11da177e4SLinus Torvalds /* 21da177e4SLinus Torvalds * Copyright (c) 2001 The Regents of the University of Michigan. 31da177e4SLinus Torvalds * All rights reserved. 41da177e4SLinus Torvalds * 51da177e4SLinus Torvalds * Kendrick Smith <kmsmith@umich.edu> 61da177e4SLinus Torvalds * Andy Adamson <kandros@umich.edu> 71da177e4SLinus Torvalds * 81da177e4SLinus Torvalds * Redistribution and use in source and binary forms, with or without 91da177e4SLinus Torvalds * modification, are permitted provided that the following conditions 101da177e4SLinus Torvalds * are met: 111da177e4SLinus Torvalds * 121da177e4SLinus Torvalds * 1. Redistributions of source code must retain the above copyright 131da177e4SLinus Torvalds * notice, this list of conditions and the following disclaimer. 141da177e4SLinus Torvalds * 2. Redistributions in binary form must reproduce the above copyright 151da177e4SLinus Torvalds * notice, this list of conditions and the following disclaimer in the 161da177e4SLinus Torvalds * documentation and/or other materials provided with the distribution. 171da177e4SLinus Torvalds * 3. Neither the name of the University nor the names of its 181da177e4SLinus Torvalds * contributors may be used to endorse or promote products derived 191da177e4SLinus Torvalds * from this software without specific prior written permission. 201da177e4SLinus Torvalds * 211da177e4SLinus Torvalds * THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESS OR IMPLIED 221da177e4SLinus Torvalds * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF 231da177e4SLinus Torvalds * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE 241da177e4SLinus Torvalds * DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 251da177e4SLinus Torvalds * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR 261da177e4SLinus Torvalds * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF 271da177e4SLinus Torvalds * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR 281da177e4SLinus Torvalds * BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF 291da177e4SLinus Torvalds * LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING 301da177e4SLinus Torvalds * NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS 311da177e4SLinus Torvalds * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 321da177e4SLinus Torvalds * 331da177e4SLinus Torvalds */ 341da177e4SLinus Torvalds 35aceaf78dSDave Hansen #include <linux/file.h> 36b89f4321SArnd Bergmann #include <linux/fs.h> 375a0e3ad6STejun Heo #include <linux/slab.h> 380964a3d3SNeilBrown #include <linux/namei.h> 39c2f1a551SMeelap Shah #include <linux/swap.h> 4068e76ad0SOlga Kornievskaia #include <linux/sunrpc/svcauth_gss.h> 41363168b4SJeff Layton #include <linux/sunrpc/clnt.h> 429a74af21SBoaz Harrosh #include "xdr4.h" 430a3adadeSJ. Bruce Fields #include "vfs.h" 441da177e4SLinus Torvalds 451da177e4SLinus Torvalds #define NFSDDBG_FACILITY NFSDDBG_PROC 461da177e4SLinus Torvalds 471da177e4SLinus Torvalds /* Globals */ 48cf07d2eaSJ. Bruce Fields time_t nfsd4_lease = 90; /* default lease time */ 49efc4bb4fSJ. Bruce Fields time_t nfsd4_grace = 90; 50fd39ca9aSNeilBrown static time_t boot_time; 511da177e4SLinus Torvalds static u32 current_ownerid = 1; 521da177e4SLinus Torvalds static u32 current_fileid = 1; 531da177e4SLinus Torvalds static u32 current_delegid = 1; 54fd39ca9aSNeilBrown static stateid_t zerostateid; /* bits all 0 */ 55fd39ca9aSNeilBrown static stateid_t onestateid; /* bits all 1 */ 56ec6b5d7bSAndy Adamson static u64 current_sessionid = 1; 57fd39ca9aSNeilBrown 58fd39ca9aSNeilBrown #define ZERO_STATEID(stateid) (!memcmp((stateid), &zerostateid, sizeof(stateid_t))) 59fd39ca9aSNeilBrown #define ONE_STATEID(stateid) (!memcmp((stateid), &onestateid, sizeof(stateid_t))) 601da177e4SLinus Torvalds 611da177e4SLinus Torvalds /* forward declarations */ 62fd39ca9aSNeilBrown static struct nfs4_stateid * find_stateid(stateid_t *stid, int flags); 631da177e4SLinus Torvalds static struct nfs4_delegation * find_delegation_stateid(struct inode *ino, stateid_t *stid); 640964a3d3SNeilBrown static char user_recovery_dirname[PATH_MAX] = "/var/lib/nfs/v4recovery"; 650964a3d3SNeilBrown static void nfs4_set_recdir(char *recdir); 661da177e4SLinus Torvalds 678b671b80SJ. Bruce Fields /* Locking: */ 688b671b80SJ. Bruce Fields 698b671b80SJ. Bruce Fields /* Currently used for almost all code touching nfsv4 state: */ 70353ab6e9SIngo Molnar static DEFINE_MUTEX(client_mutex); 711da177e4SLinus Torvalds 728b671b80SJ. Bruce Fields /* 738b671b80SJ. Bruce Fields * Currently used for the del_recall_lru and file hash table. In an 748b671b80SJ. Bruce Fields * effort to decrease the scope of the client_mutex, this spinlock may 758b671b80SJ. Bruce Fields * eventually cover more: 768b671b80SJ. Bruce Fields */ 778b671b80SJ. Bruce Fields static DEFINE_SPINLOCK(recall_lock); 788b671b80SJ. Bruce Fields 79e18b890bSChristoph Lameter static struct kmem_cache *stateowner_slab = NULL; 80e18b890bSChristoph Lameter static struct kmem_cache *file_slab = NULL; 81e18b890bSChristoph Lameter static struct kmem_cache *stateid_slab = NULL; 82e18b890bSChristoph Lameter static struct kmem_cache *deleg_slab = NULL; 83e60d4398SNeilBrown 841da177e4SLinus Torvalds void 851da177e4SLinus Torvalds nfs4_lock_state(void) 861da177e4SLinus Torvalds { 87353ab6e9SIngo Molnar mutex_lock(&client_mutex); 881da177e4SLinus Torvalds } 891da177e4SLinus Torvalds 901da177e4SLinus Torvalds void 911da177e4SLinus Torvalds nfs4_unlock_state(void) 921da177e4SLinus Torvalds { 93353ab6e9SIngo Molnar mutex_unlock(&client_mutex); 941da177e4SLinus Torvalds } 951da177e4SLinus Torvalds 961da177e4SLinus Torvalds static inline u32 971da177e4SLinus Torvalds opaque_hashval(const void *ptr, int nbytes) 981da177e4SLinus Torvalds { 991da177e4SLinus Torvalds unsigned char *cptr = (unsigned char *) ptr; 1001da177e4SLinus Torvalds 1011da177e4SLinus Torvalds u32 x = 0; 1021da177e4SLinus Torvalds while (nbytes--) { 1031da177e4SLinus Torvalds x *= 37; 1041da177e4SLinus Torvalds x += *cptr++; 1051da177e4SLinus Torvalds } 1061da177e4SLinus Torvalds return x; 1071da177e4SLinus Torvalds } 1081da177e4SLinus Torvalds 1091da177e4SLinus Torvalds static struct list_head del_recall_lru; 1101da177e4SLinus Torvalds 11113cd2184SNeilBrown static inline void 11213cd2184SNeilBrown put_nfs4_file(struct nfs4_file *fi) 11313cd2184SNeilBrown { 1148b671b80SJ. Bruce Fields if (atomic_dec_and_lock(&fi->fi_ref, &recall_lock)) { 1158b671b80SJ. Bruce Fields list_del(&fi->fi_hash); 1168b671b80SJ. Bruce Fields spin_unlock(&recall_lock); 1178b671b80SJ. Bruce Fields iput(fi->fi_inode); 1188b671b80SJ. Bruce Fields kmem_cache_free(file_slab, fi); 1198b671b80SJ. Bruce Fields } 12013cd2184SNeilBrown } 12113cd2184SNeilBrown 12213cd2184SNeilBrown static inline void 12313cd2184SNeilBrown get_nfs4_file(struct nfs4_file *fi) 12413cd2184SNeilBrown { 1258b671b80SJ. Bruce Fields atomic_inc(&fi->fi_ref); 12613cd2184SNeilBrown } 12713cd2184SNeilBrown 128ef0f3390SNeilBrown static int num_delegations; 129c2f1a551SMeelap Shah unsigned int max_delegations; 130ef0f3390SNeilBrown 131ef0f3390SNeilBrown /* 132ef0f3390SNeilBrown * Open owner state (share locks) 133ef0f3390SNeilBrown */ 134ef0f3390SNeilBrown 135ef0f3390SNeilBrown /* hash tables for nfs4_stateowner */ 136ef0f3390SNeilBrown #define OWNER_HASH_BITS 8 137ef0f3390SNeilBrown #define OWNER_HASH_SIZE (1 << OWNER_HASH_BITS) 138ef0f3390SNeilBrown #define OWNER_HASH_MASK (OWNER_HASH_SIZE - 1) 139ef0f3390SNeilBrown 140ef0f3390SNeilBrown #define ownerid_hashval(id) \ 141ef0f3390SNeilBrown ((id) & OWNER_HASH_MASK) 142ef0f3390SNeilBrown #define ownerstr_hashval(clientid, ownername) \ 143ef0f3390SNeilBrown (((clientid) + opaque_hashval((ownername.data), (ownername.len))) & OWNER_HASH_MASK) 144ef0f3390SNeilBrown 145ef0f3390SNeilBrown static struct list_head ownerid_hashtbl[OWNER_HASH_SIZE]; 146ef0f3390SNeilBrown static struct list_head ownerstr_hashtbl[OWNER_HASH_SIZE]; 147ef0f3390SNeilBrown 148ef0f3390SNeilBrown /* hash table for nfs4_file */ 149ef0f3390SNeilBrown #define FILE_HASH_BITS 8 150ef0f3390SNeilBrown #define FILE_HASH_SIZE (1 << FILE_HASH_BITS) 15135079582SShan Wei 152ef0f3390SNeilBrown /* hash table for (open)nfs4_stateid */ 153ef0f3390SNeilBrown #define STATEID_HASH_BITS 10 154ef0f3390SNeilBrown #define STATEID_HASH_SIZE (1 << STATEID_HASH_BITS) 155ef0f3390SNeilBrown #define STATEID_HASH_MASK (STATEID_HASH_SIZE - 1) 156ef0f3390SNeilBrown 157ef0f3390SNeilBrown #define file_hashval(x) \ 158ef0f3390SNeilBrown hash_ptr(x, FILE_HASH_BITS) 159ef0f3390SNeilBrown #define stateid_hashval(owner_id, file_id) \ 160ef0f3390SNeilBrown (((owner_id) + (file_id)) & STATEID_HASH_MASK) 161ef0f3390SNeilBrown 162ef0f3390SNeilBrown static struct list_head file_hashtbl[FILE_HASH_SIZE]; 163ef0f3390SNeilBrown static struct list_head stateid_hashtbl[STATEID_HASH_SIZE]; 164ef0f3390SNeilBrown 165998db52cSJ. Bruce Fields static void __nfs4_file_get_access(struct nfs4_file *fp, int oflag) 166f9d7562fSJ. Bruce Fields { 167f9d7562fSJ. Bruce Fields BUG_ON(!(fp->fi_fds[oflag] || fp->fi_fds[O_RDWR])); 168f9d7562fSJ. Bruce Fields atomic_inc(&fp->fi_access[oflag]); 169f9d7562fSJ. Bruce Fields } 170f9d7562fSJ. Bruce Fields 171998db52cSJ. Bruce Fields static void nfs4_file_get_access(struct nfs4_file *fp, int oflag) 172998db52cSJ. Bruce Fields { 173998db52cSJ. Bruce Fields if (oflag == O_RDWR) { 174998db52cSJ. Bruce Fields __nfs4_file_get_access(fp, O_RDONLY); 175998db52cSJ. Bruce Fields __nfs4_file_get_access(fp, O_WRONLY); 176998db52cSJ. Bruce Fields } else 177998db52cSJ. Bruce Fields __nfs4_file_get_access(fp, oflag); 178998db52cSJ. Bruce Fields } 179998db52cSJ. Bruce Fields 180998db52cSJ. Bruce Fields static void nfs4_file_put_fd(struct nfs4_file *fp, int oflag) 181f9d7562fSJ. Bruce Fields { 182f9d7562fSJ. Bruce Fields if (fp->fi_fds[oflag]) { 183f9d7562fSJ. Bruce Fields fput(fp->fi_fds[oflag]); 184f9d7562fSJ. Bruce Fields fp->fi_fds[oflag] = NULL; 185f9d7562fSJ. Bruce Fields } 186f9d7562fSJ. Bruce Fields } 187f9d7562fSJ. Bruce Fields 188998db52cSJ. Bruce Fields static void __nfs4_file_put_access(struct nfs4_file *fp, int oflag) 189f9d7562fSJ. Bruce Fields { 190f9d7562fSJ. Bruce Fields if (atomic_dec_and_test(&fp->fi_access[oflag])) { 191f9d7562fSJ. Bruce Fields nfs4_file_put_fd(fp, O_RDWR); 192f9d7562fSJ. Bruce Fields nfs4_file_put_fd(fp, oflag); 193f9d7562fSJ. Bruce Fields } 194f9d7562fSJ. Bruce Fields } 195f9d7562fSJ. Bruce Fields 196998db52cSJ. Bruce Fields static void nfs4_file_put_access(struct nfs4_file *fp, int oflag) 197998db52cSJ. Bruce Fields { 198998db52cSJ. Bruce Fields if (oflag == O_RDWR) { 199998db52cSJ. Bruce Fields __nfs4_file_put_access(fp, O_RDONLY); 200998db52cSJ. Bruce Fields __nfs4_file_put_access(fp, O_WRONLY); 201998db52cSJ. Bruce Fields } else 202998db52cSJ. Bruce Fields __nfs4_file_put_access(fp, oflag); 203998db52cSJ. Bruce Fields } 204998db52cSJ. Bruce Fields 2051da177e4SLinus Torvalds static struct nfs4_delegation * 2061da177e4SLinus Torvalds alloc_init_deleg(struct nfs4_client *clp, struct nfs4_stateid *stp, struct svc_fh *current_fh, u32 type) 2071da177e4SLinus Torvalds { 2081da177e4SLinus Torvalds struct nfs4_delegation *dp; 2091da177e4SLinus Torvalds struct nfs4_file *fp = stp->st_file; 2101da177e4SLinus Torvalds 2111da177e4SLinus Torvalds dprintk("NFSD alloc_init_deleg\n"); 212c3e48080SJ. Bruce Fields /* 213c3e48080SJ. Bruce Fields * Major work on the lease subsystem (for example, to support 214c3e48080SJ. Bruce Fields * calbacks on stat) will be required before we can support 215c3e48080SJ. Bruce Fields * write delegations properly. 216c3e48080SJ. Bruce Fields */ 217c3e48080SJ. Bruce Fields if (type != NFS4_OPEN_DELEGATE_READ) 218c3e48080SJ. Bruce Fields return NULL; 21947f9940cSMeelap Shah if (fp->fi_had_conflict) 22047f9940cSMeelap Shah return NULL; 221c2f1a551SMeelap Shah if (num_delegations > max_delegations) 222ef0f3390SNeilBrown return NULL; 2235b2d21c1SNeilBrown dp = kmem_cache_alloc(deleg_slab, GFP_KERNEL); 2245b2d21c1SNeilBrown if (dp == NULL) 2251da177e4SLinus Torvalds return dp; 226ef0f3390SNeilBrown num_delegations++; 227ea1da636SNeilBrown INIT_LIST_HEAD(&dp->dl_perfile); 228ea1da636SNeilBrown INIT_LIST_HEAD(&dp->dl_perclnt); 2291da177e4SLinus Torvalds INIT_LIST_HEAD(&dp->dl_recall_lru); 2301da177e4SLinus Torvalds dp->dl_client = clp; 23113cd2184SNeilBrown get_nfs4_file(fp); 2321da177e4SLinus Torvalds dp->dl_file = fp; 2331da177e4SLinus Torvalds dp->dl_type = type; 234e4e83ea4SJ. Bruce Fields dp->dl_stateid.si_boot = boot_time; 2351da177e4SLinus Torvalds dp->dl_stateid.si_stateownerid = current_delegid++; 2361da177e4SLinus Torvalds dp->dl_stateid.si_fileid = 0; 2371da177e4SLinus Torvalds dp->dl_stateid.si_generation = 0; 2386c02eaa1SJ. Bruce Fields fh_copy_shallow(&dp->dl_fh, ¤t_fh->fh_handle); 2391da177e4SLinus Torvalds dp->dl_time = 0; 2401da177e4SLinus Torvalds atomic_set(&dp->dl_count, 1); 241b5a1a81eSJ. Bruce Fields INIT_WORK(&dp->dl_recall.cb_work, nfsd4_do_callback_rpc); 2421da177e4SLinus Torvalds return dp; 2431da177e4SLinus Torvalds } 2441da177e4SLinus Torvalds 2451da177e4SLinus Torvalds void 2461da177e4SLinus Torvalds nfs4_put_delegation(struct nfs4_delegation *dp) 2471da177e4SLinus Torvalds { 2481da177e4SLinus Torvalds if (atomic_dec_and_test(&dp->dl_count)) { 2491da177e4SLinus Torvalds dprintk("NFSD: freeing dp %p\n",dp); 25013cd2184SNeilBrown put_nfs4_file(dp->dl_file); 2515b2d21c1SNeilBrown kmem_cache_free(deleg_slab, dp); 252ef0f3390SNeilBrown num_delegations--; 2531da177e4SLinus Torvalds } 2541da177e4SLinus Torvalds } 2551da177e4SLinus Torvalds 256acfdf5c3SJ. Bruce Fields static void nfs4_put_deleg_lease(struct nfs4_file *fp) 2571da177e4SLinus Torvalds { 258acfdf5c3SJ. Bruce Fields if (atomic_dec_and_test(&fp->fi_delegees)) { 259acfdf5c3SJ. Bruce Fields vfs_setlease(fp->fi_deleg_file, F_UNLCK, &fp->fi_lease); 260acfdf5c3SJ. Bruce Fields fp->fi_lease = NULL; 261acfdf5c3SJ. Bruce Fields fp->fi_deleg_file = NULL; 262acfdf5c3SJ. Bruce Fields } 2631da177e4SLinus Torvalds } 2641da177e4SLinus Torvalds 2651da177e4SLinus Torvalds /* Called under the state lock. */ 2661da177e4SLinus Torvalds static void 2671da177e4SLinus Torvalds unhash_delegation(struct nfs4_delegation *dp) 2681da177e4SLinus Torvalds { 269ea1da636SNeilBrown list_del_init(&dp->dl_perclnt); 2701da177e4SLinus Torvalds spin_lock(&recall_lock); 2715d926e8cSJ. Bruce Fields list_del_init(&dp->dl_perfile); 2721da177e4SLinus Torvalds list_del_init(&dp->dl_recall_lru); 2731da177e4SLinus Torvalds spin_unlock(&recall_lock); 274acfdf5c3SJ. Bruce Fields nfs4_put_deleg_lease(dp->dl_file); 2751da177e4SLinus Torvalds nfs4_put_delegation(dp); 2761da177e4SLinus Torvalds } 2771da177e4SLinus Torvalds 2781da177e4SLinus Torvalds /* 2791da177e4SLinus Torvalds * SETCLIENTID state 2801da177e4SLinus Torvalds */ 2811da177e4SLinus Torvalds 28236acb66bSBenny Halevy /* client_lock protects the client lru list and session hash table */ 2839089f1b4SBenny Halevy static DEFINE_SPINLOCK(client_lock); 2849089f1b4SBenny Halevy 2851da177e4SLinus Torvalds /* Hash tables for nfs4_clientid state */ 2861da177e4SLinus Torvalds #define CLIENT_HASH_BITS 4 2871da177e4SLinus Torvalds #define CLIENT_HASH_SIZE (1 << CLIENT_HASH_BITS) 2881da177e4SLinus Torvalds #define CLIENT_HASH_MASK (CLIENT_HASH_SIZE - 1) 2891da177e4SLinus Torvalds 2901da177e4SLinus Torvalds #define clientid_hashval(id) \ 2911da177e4SLinus Torvalds ((id) & CLIENT_HASH_MASK) 292a55370a3SNeilBrown #define clientstr_hashval(name) \ 293a55370a3SNeilBrown (opaque_hashval((name), 8) & CLIENT_HASH_MASK) 2941da177e4SLinus Torvalds /* 2951da177e4SLinus Torvalds * reclaim_str_hashtbl[] holds known client info from previous reset/reboot 2961da177e4SLinus Torvalds * used in reboot/reset lease grace period processing 2971da177e4SLinus Torvalds * 2981da177e4SLinus Torvalds * conf_id_hashtbl[], and conf_str_hashtbl[] hold confirmed 2991da177e4SLinus Torvalds * setclientid_confirmed info. 3001da177e4SLinus Torvalds * 3011da177e4SLinus Torvalds * unconf_str_hastbl[] and unconf_id_hashtbl[] hold unconfirmed 3021da177e4SLinus Torvalds * setclientid info. 3031da177e4SLinus Torvalds * 3041da177e4SLinus Torvalds * client_lru holds client queue ordered by nfs4_client.cl_time 3051da177e4SLinus Torvalds * for lease renewal. 3061da177e4SLinus Torvalds * 3071da177e4SLinus Torvalds * close_lru holds (open) stateowner queue ordered by nfs4_stateowner.so_time 3081da177e4SLinus Torvalds * for last close replay. 3091da177e4SLinus Torvalds */ 3101da177e4SLinus Torvalds static struct list_head reclaim_str_hashtbl[CLIENT_HASH_SIZE]; 3111da177e4SLinus Torvalds static int reclaim_str_hashtbl_size = 0; 3121da177e4SLinus Torvalds static struct list_head conf_id_hashtbl[CLIENT_HASH_SIZE]; 3131da177e4SLinus Torvalds static struct list_head conf_str_hashtbl[CLIENT_HASH_SIZE]; 3141da177e4SLinus Torvalds static struct list_head unconf_str_hashtbl[CLIENT_HASH_SIZE]; 3151da177e4SLinus Torvalds static struct list_head unconf_id_hashtbl[CLIENT_HASH_SIZE]; 3161da177e4SLinus Torvalds static struct list_head client_lru; 3171da177e4SLinus Torvalds static struct list_head close_lru; 3181da177e4SLinus Torvalds 319f9d7562fSJ. Bruce Fields /* 320f9d7562fSJ. Bruce Fields * We store the NONE, READ, WRITE, and BOTH bits separately in the 321f9d7562fSJ. Bruce Fields * st_{access,deny}_bmap field of the stateid, in order to track not 322f9d7562fSJ. Bruce Fields * only what share bits are currently in force, but also what 323f9d7562fSJ. Bruce Fields * combinations of share bits previous opens have used. This allows us 324f9d7562fSJ. Bruce Fields * to enforce the recommendation of rfc 3530 14.2.19 that the server 325f9d7562fSJ. Bruce Fields * return an error if the client attempt to downgrade to a combination 326f9d7562fSJ. Bruce Fields * of share bits not explicable by closing some of its previous opens. 327f9d7562fSJ. Bruce Fields * 328f9d7562fSJ. Bruce Fields * XXX: This enforcement is actually incomplete, since we don't keep 329f9d7562fSJ. Bruce Fields * track of access/deny bit combinations; so, e.g., we allow: 330f9d7562fSJ. Bruce Fields * 331f9d7562fSJ. Bruce Fields * OPEN allow read, deny write 332f9d7562fSJ. Bruce Fields * OPEN allow both, deny none 333f9d7562fSJ. Bruce Fields * DOWNGRADE allow read, deny none 334f9d7562fSJ. Bruce Fields * 335f9d7562fSJ. Bruce Fields * which we should reject. 336f9d7562fSJ. Bruce Fields */ 337f9d7562fSJ. Bruce Fields static void 338f9d7562fSJ. Bruce Fields set_access(unsigned int *access, unsigned long bmap) { 339f9d7562fSJ. Bruce Fields int i; 340f9d7562fSJ. Bruce Fields 341f9d7562fSJ. Bruce Fields *access = 0; 342f9d7562fSJ. Bruce Fields for (i = 1; i < 4; i++) { 343f9d7562fSJ. Bruce Fields if (test_bit(i, &bmap)) 344f9d7562fSJ. Bruce Fields *access |= i; 345f9d7562fSJ. Bruce Fields } 346f9d7562fSJ. Bruce Fields } 347f9d7562fSJ. Bruce Fields 348f9d7562fSJ. Bruce Fields static void 349f9d7562fSJ. Bruce Fields set_deny(unsigned int *deny, unsigned long bmap) { 350f9d7562fSJ. Bruce Fields int i; 351f9d7562fSJ. Bruce Fields 352f9d7562fSJ. Bruce Fields *deny = 0; 353f9d7562fSJ. Bruce Fields for (i = 0; i < 4; i++) { 354f9d7562fSJ. Bruce Fields if (test_bit(i, &bmap)) 355f9d7562fSJ. Bruce Fields *deny |= i ; 356f9d7562fSJ. Bruce Fields } 357f9d7562fSJ. Bruce Fields } 358f9d7562fSJ. Bruce Fields 359f9d7562fSJ. Bruce Fields static int 360f9d7562fSJ. Bruce Fields test_share(struct nfs4_stateid *stp, struct nfsd4_open *open) { 361f9d7562fSJ. Bruce Fields unsigned int access, deny; 362f9d7562fSJ. Bruce Fields 363f9d7562fSJ. Bruce Fields set_access(&access, stp->st_access_bmap); 364f9d7562fSJ. Bruce Fields set_deny(&deny, stp->st_deny_bmap); 365f9d7562fSJ. Bruce Fields if ((access & open->op_share_deny) || (deny & open->op_share_access)) 366f9d7562fSJ. Bruce Fields return 0; 367f9d7562fSJ. Bruce Fields return 1; 368f9d7562fSJ. Bruce Fields } 369f9d7562fSJ. Bruce Fields 370f9d7562fSJ. Bruce Fields static int nfs4_access_to_omode(u32 access) 371f9d7562fSJ. Bruce Fields { 3728f34a430SJ. Bruce Fields switch (access & NFS4_SHARE_ACCESS_BOTH) { 373f9d7562fSJ. Bruce Fields case NFS4_SHARE_ACCESS_READ: 374f9d7562fSJ. Bruce Fields return O_RDONLY; 375f9d7562fSJ. Bruce Fields case NFS4_SHARE_ACCESS_WRITE: 376f9d7562fSJ. Bruce Fields return O_WRONLY; 377f9d7562fSJ. Bruce Fields case NFS4_SHARE_ACCESS_BOTH: 378f9d7562fSJ. Bruce Fields return O_RDWR; 379f9d7562fSJ. Bruce Fields } 380f9d7562fSJ. Bruce Fields BUG(); 381f9d7562fSJ. Bruce Fields } 382f9d7562fSJ. Bruce Fields 383f9d7562fSJ. Bruce Fields static int nfs4_access_bmap_to_omode(struct nfs4_stateid *stp) 384f9d7562fSJ. Bruce Fields { 385f9d7562fSJ. Bruce Fields unsigned int access; 386f9d7562fSJ. Bruce Fields 387f9d7562fSJ. Bruce Fields set_access(&access, stp->st_access_bmap); 388f9d7562fSJ. Bruce Fields return nfs4_access_to_omode(access); 389f9d7562fSJ. Bruce Fields } 390f9d7562fSJ. Bruce Fields 391529d7b2aSJ. Bruce Fields static void unhash_generic_stateid(struct nfs4_stateid *stp) 392529d7b2aSJ. Bruce Fields { 393529d7b2aSJ. Bruce Fields list_del(&stp->st_hash); 394529d7b2aSJ. Bruce Fields list_del(&stp->st_perfile); 395529d7b2aSJ. Bruce Fields list_del(&stp->st_perstateowner); 396529d7b2aSJ. Bruce Fields } 397529d7b2aSJ. Bruce Fields 398529d7b2aSJ. Bruce Fields static void free_generic_stateid(struct nfs4_stateid *stp) 399529d7b2aSJ. Bruce Fields { 40023fcf2ecSJ. Bruce Fields int oflag; 4010997b173SJ. Bruce Fields 40223fcf2ecSJ. Bruce Fields if (stp->st_access_bmap) { 40323fcf2ecSJ. Bruce Fields oflag = nfs4_access_bmap_to_omode(stp); 4040997b173SJ. Bruce Fields nfs4_file_put_access(stp->st_file, oflag); 405529d7b2aSJ. Bruce Fields put_nfs4_file(stp->st_file); 40623fcf2ecSJ. Bruce Fields } 407529d7b2aSJ. Bruce Fields kmem_cache_free(stateid_slab, stp); 408529d7b2aSJ. Bruce Fields } 409529d7b2aSJ. Bruce Fields 410529d7b2aSJ. Bruce Fields static void release_lock_stateid(struct nfs4_stateid *stp) 411529d7b2aSJ. Bruce Fields { 412529d7b2aSJ. Bruce Fields struct file *file; 413529d7b2aSJ. Bruce Fields 414529d7b2aSJ. Bruce Fields unhash_generic_stateid(stp); 415529d7b2aSJ. Bruce Fields file = find_any_file(stp->st_file); 416529d7b2aSJ. Bruce Fields if (file) 417529d7b2aSJ. Bruce Fields locks_remove_posix(file, (fl_owner_t)stp->st_stateowner); 418529d7b2aSJ. Bruce Fields free_generic_stateid(stp); 419529d7b2aSJ. Bruce Fields } 420529d7b2aSJ. Bruce Fields 421529d7b2aSJ. Bruce Fields static void unhash_lockowner(struct nfs4_stateowner *sop) 422529d7b2aSJ. Bruce Fields { 423529d7b2aSJ. Bruce Fields struct nfs4_stateid *stp; 424529d7b2aSJ. Bruce Fields 425529d7b2aSJ. Bruce Fields list_del(&sop->so_idhash); 426529d7b2aSJ. Bruce Fields list_del(&sop->so_strhash); 427529d7b2aSJ. Bruce Fields list_del(&sop->so_perstateid); 428529d7b2aSJ. Bruce Fields while (!list_empty(&sop->so_stateids)) { 429529d7b2aSJ. Bruce Fields stp = list_first_entry(&sop->so_stateids, 430529d7b2aSJ. Bruce Fields struct nfs4_stateid, st_perstateowner); 431529d7b2aSJ. Bruce Fields release_lock_stateid(stp); 432529d7b2aSJ. Bruce Fields } 433529d7b2aSJ. Bruce Fields } 434529d7b2aSJ. Bruce Fields 435529d7b2aSJ. Bruce Fields static void release_lockowner(struct nfs4_stateowner *sop) 436529d7b2aSJ. Bruce Fields { 437529d7b2aSJ. Bruce Fields unhash_lockowner(sop); 438529d7b2aSJ. Bruce Fields nfs4_put_stateowner(sop); 439529d7b2aSJ. Bruce Fields } 440529d7b2aSJ. Bruce Fields 441529d7b2aSJ. Bruce Fields static void 442529d7b2aSJ. Bruce Fields release_stateid_lockowners(struct nfs4_stateid *open_stp) 443529d7b2aSJ. Bruce Fields { 444529d7b2aSJ. Bruce Fields struct nfs4_stateowner *lock_sop; 445529d7b2aSJ. Bruce Fields 446529d7b2aSJ. Bruce Fields while (!list_empty(&open_stp->st_lockowners)) { 447529d7b2aSJ. Bruce Fields lock_sop = list_entry(open_stp->st_lockowners.next, 448529d7b2aSJ. Bruce Fields struct nfs4_stateowner, so_perstateid); 449529d7b2aSJ. Bruce Fields /* list_del(&open_stp->st_lockowners); */ 450529d7b2aSJ. Bruce Fields BUG_ON(lock_sop->so_is_open_owner); 451529d7b2aSJ. Bruce Fields release_lockowner(lock_sop); 452529d7b2aSJ. Bruce Fields } 453529d7b2aSJ. Bruce Fields } 454529d7b2aSJ. Bruce Fields 4552283963fSJ. Bruce Fields static void release_open_stateid(struct nfs4_stateid *stp) 4562283963fSJ. Bruce Fields { 4572283963fSJ. Bruce Fields unhash_generic_stateid(stp); 4582283963fSJ. Bruce Fields release_stateid_lockowners(stp); 4592283963fSJ. Bruce Fields free_generic_stateid(stp); 4602283963fSJ. Bruce Fields } 4612283963fSJ. Bruce Fields 462f044ff83SJ. Bruce Fields static void unhash_openowner(struct nfs4_stateowner *sop) 463f1d110caSJ. Bruce Fields { 464f1d110caSJ. Bruce Fields struct nfs4_stateid *stp; 465f1d110caSJ. Bruce Fields 466f1d110caSJ. Bruce Fields list_del(&sop->so_idhash); 467f1d110caSJ. Bruce Fields list_del(&sop->so_strhash); 468f1d110caSJ. Bruce Fields list_del(&sop->so_perclient); 469f044ff83SJ. Bruce Fields list_del(&sop->so_perstateid); /* XXX: necessary? */ 470f1d110caSJ. Bruce Fields while (!list_empty(&sop->so_stateids)) { 471f044ff83SJ. Bruce Fields stp = list_first_entry(&sop->so_stateids, 472f1d110caSJ. Bruce Fields struct nfs4_stateid, st_perstateowner); 473f1d110caSJ. Bruce Fields release_open_stateid(stp); 474f1d110caSJ. Bruce Fields } 475f1d110caSJ. Bruce Fields } 476f1d110caSJ. Bruce Fields 477f044ff83SJ. Bruce Fields static void release_openowner(struct nfs4_stateowner *sop) 478f1d110caSJ. Bruce Fields { 479f044ff83SJ. Bruce Fields unhash_openowner(sop); 480f1d110caSJ. Bruce Fields list_del(&sop->so_close_lru); 481f1d110caSJ. Bruce Fields nfs4_put_stateowner(sop); 482f1d110caSJ. Bruce Fields } 483f1d110caSJ. Bruce Fields 4845282fd72SMarc Eshel #define SESSION_HASH_SIZE 512 4855282fd72SMarc Eshel static struct list_head sessionid_hashtbl[SESSION_HASH_SIZE]; 4865282fd72SMarc Eshel 4875282fd72SMarc Eshel static inline int 4885282fd72SMarc Eshel hash_sessionid(struct nfs4_sessionid *sessionid) 4895282fd72SMarc Eshel { 4905282fd72SMarc Eshel struct nfsd4_sessionid *sid = (struct nfsd4_sessionid *)sessionid; 4915282fd72SMarc Eshel 4925282fd72SMarc Eshel return sid->sequence % SESSION_HASH_SIZE; 4935282fd72SMarc Eshel } 4945282fd72SMarc Eshel 4955282fd72SMarc Eshel static inline void 4965282fd72SMarc Eshel dump_sessionid(const char *fn, struct nfs4_sessionid *sessionid) 4975282fd72SMarc Eshel { 4985282fd72SMarc Eshel u32 *ptr = (u32 *)(&sessionid->data[0]); 4995282fd72SMarc Eshel dprintk("%s: %u:%u:%u:%u\n", fn, ptr[0], ptr[1], ptr[2], ptr[3]); 5005282fd72SMarc Eshel } 5015282fd72SMarc Eshel 502ec6b5d7bSAndy Adamson static void 503ec6b5d7bSAndy Adamson gen_sessionid(struct nfsd4_session *ses) 504ec6b5d7bSAndy Adamson { 505ec6b5d7bSAndy Adamson struct nfs4_client *clp = ses->se_client; 506ec6b5d7bSAndy Adamson struct nfsd4_sessionid *sid; 507ec6b5d7bSAndy Adamson 508ec6b5d7bSAndy Adamson sid = (struct nfsd4_sessionid *)ses->se_sessionid.data; 509ec6b5d7bSAndy Adamson sid->clientid = clp->cl_clientid; 510ec6b5d7bSAndy Adamson sid->sequence = current_sessionid++; 511ec6b5d7bSAndy Adamson sid->reserved = 0; 512ec6b5d7bSAndy Adamson } 513ec6b5d7bSAndy Adamson 514ec6b5d7bSAndy Adamson /* 515a649637cSAndy Adamson * The protocol defines ca_maxresponssize_cached to include the size of 516a649637cSAndy Adamson * the rpc header, but all we need to cache is the data starting after 517a649637cSAndy Adamson * the end of the initial SEQUENCE operation--the rest we regenerate 518a649637cSAndy Adamson * each time. Therefore we can advertise a ca_maxresponssize_cached 519a649637cSAndy Adamson * value that is the number of bytes in our cache plus a few additional 520a649637cSAndy Adamson * bytes. In order to stay on the safe side, and not promise more than 521a649637cSAndy Adamson * we can cache, those additional bytes must be the minimum possible: 24 522a649637cSAndy Adamson * bytes of rpc header (xid through accept state, with AUTH_NULL 523a649637cSAndy Adamson * verifier), 12 for the compound header (with zero-length tag), and 44 524a649637cSAndy Adamson * for the SEQUENCE op response: 525ec6b5d7bSAndy Adamson */ 526a649637cSAndy Adamson #define NFSD_MIN_HDR_SEQ_SZ (24 + 12 + 44) 527a649637cSAndy Adamson 528557ce264SAndy Adamson static void 529557ce264SAndy Adamson free_session_slots(struct nfsd4_session *ses) 530557ce264SAndy Adamson { 531557ce264SAndy Adamson int i; 532557ce264SAndy Adamson 533557ce264SAndy Adamson for (i = 0; i < ses->se_fchannel.maxreqs; i++) 534557ce264SAndy Adamson kfree(ses->se_slots[i]); 535557ce264SAndy Adamson } 536557ce264SAndy Adamson 537efe0cb6dSJ. Bruce Fields /* 538efe0cb6dSJ. Bruce Fields * We don't actually need to cache the rpc and session headers, so we 539efe0cb6dSJ. Bruce Fields * can allocate a little less for each slot: 540efe0cb6dSJ. Bruce Fields */ 541efe0cb6dSJ. Bruce Fields static inline int slot_bytes(struct nfsd4_channel_attrs *ca) 542efe0cb6dSJ. Bruce Fields { 543efe0cb6dSJ. Bruce Fields return ca->maxresp_cached - NFSD_MIN_HDR_SEQ_SZ; 544efe0cb6dSJ. Bruce Fields } 545efe0cb6dSJ. Bruce Fields 5465b6feee9SJ. Bruce Fields static int nfsd4_sanitize_slot_size(u32 size) 547ec6b5d7bSAndy Adamson { 5485b6feee9SJ. Bruce Fields size -= NFSD_MIN_HDR_SEQ_SZ; /* We don't cache the rpc header */ 5495b6feee9SJ. Bruce Fields size = min_t(u32, size, NFSD_SLOT_CACHE_SIZE); 550ec6b5d7bSAndy Adamson 5515b6feee9SJ. Bruce Fields return size; 552557ce264SAndy Adamson } 553557ce264SAndy Adamson 5545b6feee9SJ. Bruce Fields /* 5555b6feee9SJ. Bruce Fields * XXX: If we run out of reserved DRC memory we could (up to a point) 5565b6feee9SJ. Bruce Fields * re-negotiate active sessions and reduce their slot usage to make 5575b6feee9SJ. Bruce Fields * rooom for new connections. For now we just fail the create session. 5585b6feee9SJ. Bruce Fields */ 5595b6feee9SJ. Bruce Fields static int nfsd4_get_drc_mem(int slotsize, u32 num) 5605b6feee9SJ. Bruce Fields { 5615b6feee9SJ. Bruce Fields int avail; 5625b6feee9SJ. Bruce Fields 5635b6feee9SJ. Bruce Fields num = min_t(u32, num, NFSD_MAX_SLOTS_PER_SESSION); 5645b6feee9SJ. Bruce Fields 5655b6feee9SJ. Bruce Fields spin_lock(&nfsd_drc_lock); 5665b6feee9SJ. Bruce Fields avail = min_t(int, NFSD_MAX_MEM_PER_SESSION, 5675b6feee9SJ. Bruce Fields nfsd_drc_max_mem - nfsd_drc_mem_used); 5685b6feee9SJ. Bruce Fields num = min_t(int, num, avail / slotsize); 5695b6feee9SJ. Bruce Fields nfsd_drc_mem_used += num * slotsize; 5705b6feee9SJ. Bruce Fields spin_unlock(&nfsd_drc_lock); 5715b6feee9SJ. Bruce Fields 5725b6feee9SJ. Bruce Fields return num; 5735b6feee9SJ. Bruce Fields } 5745b6feee9SJ. Bruce Fields 5755b6feee9SJ. Bruce Fields static void nfsd4_put_drc_mem(int slotsize, int num) 5765b6feee9SJ. Bruce Fields { 5775b6feee9SJ. Bruce Fields spin_lock(&nfsd_drc_lock); 5785b6feee9SJ. Bruce Fields nfsd_drc_mem_used -= slotsize * num; 5795b6feee9SJ. Bruce Fields spin_unlock(&nfsd_drc_lock); 5805b6feee9SJ. Bruce Fields } 5815b6feee9SJ. Bruce Fields 5825b6feee9SJ. Bruce Fields static struct nfsd4_session *alloc_session(int slotsize, int numslots) 5835b6feee9SJ. Bruce Fields { 5845b6feee9SJ. Bruce Fields struct nfsd4_session *new; 5855b6feee9SJ. Bruce Fields int mem, i; 586ec6b5d7bSAndy Adamson 587c23753daSJ. Bruce Fields BUILD_BUG_ON(NFSD_MAX_SLOTS_PER_SESSION * sizeof(struct nfsd4_slot *) 588ec6b5d7bSAndy Adamson + sizeof(struct nfsd4_session) > PAGE_SIZE); 5895b6feee9SJ. Bruce Fields mem = numslots * sizeof(struct nfsd4_slot *); 590ec6b5d7bSAndy Adamson 5915b6feee9SJ. Bruce Fields new = kzalloc(sizeof(*new) + mem, GFP_KERNEL); 5926c18ba9fSAlexandros Batsakis if (!new) 5935b6feee9SJ. Bruce Fields return NULL; 594ec6b5d7bSAndy Adamson /* allocate each struct nfsd4_slot and data cache in one piece */ 5955b6feee9SJ. Bruce Fields for (i = 0; i < numslots; i++) { 5965b6feee9SJ. Bruce Fields mem = sizeof(struct nfsd4_slot) + slotsize; 5975b6feee9SJ. Bruce Fields new->se_slots[i] = kzalloc(mem, GFP_KERNEL); 5985b6feee9SJ. Bruce Fields if (!new->se_slots[i]) 599ec6b5d7bSAndy Adamson goto out_free; 600ec6b5d7bSAndy Adamson } 6015b6feee9SJ. Bruce Fields return new; 6025b6feee9SJ. Bruce Fields out_free: 6035b6feee9SJ. Bruce Fields while (i--) 6045b6feee9SJ. Bruce Fields kfree(new->se_slots[i]); 6055b6feee9SJ. Bruce Fields kfree(new); 6065b6feee9SJ. Bruce Fields return NULL; 6075b6feee9SJ. Bruce Fields } 6085b6feee9SJ. Bruce Fields 6095b6feee9SJ. Bruce Fields static void init_forechannel_attrs(struct nfsd4_channel_attrs *new, struct nfsd4_channel_attrs *req, int numslots, int slotsize) 6105b6feee9SJ. Bruce Fields { 6115b6feee9SJ. Bruce Fields u32 maxrpc = nfsd_serv->sv_max_mesg; 6125b6feee9SJ. Bruce Fields 6135b6feee9SJ. Bruce Fields new->maxreqs = numslots; 614d2b21743SMi Jinlong new->maxresp_cached = min_t(u32, req->maxresp_cached, 615d2b21743SMi Jinlong slotsize + NFSD_MIN_HDR_SEQ_SZ); 6165b6feee9SJ. Bruce Fields new->maxreq_sz = min_t(u32, req->maxreq_sz, maxrpc); 6175b6feee9SJ. Bruce Fields new->maxresp_sz = min_t(u32, req->maxresp_sz, maxrpc); 6185b6feee9SJ. Bruce Fields new->maxops = min_t(u32, req->maxops, NFSD_MAX_OPS_PER_COMPOUND); 6195b6feee9SJ. Bruce Fields } 6205b6feee9SJ. Bruce Fields 62119cf5c02SJ. Bruce Fields static void free_conn(struct nfsd4_conn *c) 62219cf5c02SJ. Bruce Fields { 62319cf5c02SJ. Bruce Fields svc_xprt_put(c->cn_xprt); 62419cf5c02SJ. Bruce Fields kfree(c); 62519cf5c02SJ. Bruce Fields } 62619cf5c02SJ. Bruce Fields 62719cf5c02SJ. Bruce Fields static void nfsd4_conn_lost(struct svc_xpt_user *u) 62819cf5c02SJ. Bruce Fields { 62919cf5c02SJ. Bruce Fields struct nfsd4_conn *c = container_of(u, struct nfsd4_conn, cn_xpt_user); 63019cf5c02SJ. Bruce Fields struct nfs4_client *clp = c->cn_session->se_client; 63119cf5c02SJ. Bruce Fields 63219cf5c02SJ. Bruce Fields spin_lock(&clp->cl_lock); 63319cf5c02SJ. Bruce Fields if (!list_empty(&c->cn_persession)) { 63419cf5c02SJ. Bruce Fields list_del(&c->cn_persession); 63519cf5c02SJ. Bruce Fields free_conn(c); 63619cf5c02SJ. Bruce Fields } 63719cf5c02SJ. Bruce Fields spin_unlock(&clp->cl_lock); 638eea49806SJ. Bruce Fields nfsd4_probe_callback(clp); 63919cf5c02SJ. Bruce Fields } 64019cf5c02SJ. Bruce Fields 641d29c374cSJ. Bruce Fields static struct nfsd4_conn *alloc_conn(struct svc_rqst *rqstp, u32 flags) 642c7662518SJ. Bruce Fields { 643c7662518SJ. Bruce Fields struct nfsd4_conn *conn; 644c7662518SJ. Bruce Fields 645c7662518SJ. Bruce Fields conn = kmalloc(sizeof(struct nfsd4_conn), GFP_KERNEL); 646c7662518SJ. Bruce Fields if (!conn) 647db90681dSJ. Bruce Fields return NULL; 648c7662518SJ. Bruce Fields svc_xprt_get(rqstp->rq_xprt); 649c7662518SJ. Bruce Fields conn->cn_xprt = rqstp->rq_xprt; 650d29c374cSJ. Bruce Fields conn->cn_flags = flags; 651db90681dSJ. Bruce Fields INIT_LIST_HEAD(&conn->cn_xpt_user.list); 652db90681dSJ. Bruce Fields return conn; 653db90681dSJ. Bruce Fields } 654db90681dSJ. Bruce Fields 655328ead28SJ. Bruce Fields static void __nfsd4_hash_conn(struct nfsd4_conn *conn, struct nfsd4_session *ses) 656328ead28SJ. Bruce Fields { 657328ead28SJ. Bruce Fields conn->cn_session = ses; 658328ead28SJ. Bruce Fields list_add(&conn->cn_persession, &ses->se_conns); 659328ead28SJ. Bruce Fields } 660328ead28SJ. Bruce Fields 661db90681dSJ. Bruce Fields static void nfsd4_hash_conn(struct nfsd4_conn *conn, struct nfsd4_session *ses) 662db90681dSJ. Bruce Fields { 663db90681dSJ. Bruce Fields struct nfs4_client *clp = ses->se_client; 664c7662518SJ. Bruce Fields 665c7662518SJ. Bruce Fields spin_lock(&clp->cl_lock); 666328ead28SJ. Bruce Fields __nfsd4_hash_conn(conn, ses); 667c7662518SJ. Bruce Fields spin_unlock(&clp->cl_lock); 668db90681dSJ. Bruce Fields } 669c7662518SJ. Bruce Fields 67021b75b01SJ. Bruce Fields static int nfsd4_register_conn(struct nfsd4_conn *conn) 671db90681dSJ. Bruce Fields { 67219cf5c02SJ. Bruce Fields conn->cn_xpt_user.callback = nfsd4_conn_lost; 67321b75b01SJ. Bruce Fields return register_xpt_user(conn->cn_xprt, &conn->cn_xpt_user); 674db90681dSJ. Bruce Fields } 675db90681dSJ. Bruce Fields 6761d1bc8f2SJ. Bruce Fields static __be32 nfsd4_new_conn(struct svc_rqst *rqstp, struct nfsd4_session *ses, u32 dir) 677db90681dSJ. Bruce Fields { 678db90681dSJ. Bruce Fields struct nfsd4_conn *conn; 67921b75b01SJ. Bruce Fields int ret; 680db90681dSJ. Bruce Fields 6811d1bc8f2SJ. Bruce Fields conn = alloc_conn(rqstp, dir); 682db90681dSJ. Bruce Fields if (!conn) 683db90681dSJ. Bruce Fields return nfserr_jukebox; 684db90681dSJ. Bruce Fields nfsd4_hash_conn(conn, ses); 68521b75b01SJ. Bruce Fields ret = nfsd4_register_conn(conn); 68621b75b01SJ. Bruce Fields if (ret) 68721b75b01SJ. Bruce Fields /* oops; xprt is already down: */ 68821b75b01SJ. Bruce Fields nfsd4_conn_lost(&conn->cn_xpt_user); 689c7662518SJ. Bruce Fields return nfs_ok; 690c7662518SJ. Bruce Fields } 691c7662518SJ. Bruce Fields 6921d1bc8f2SJ. Bruce Fields static __be32 nfsd4_new_conn_from_crses(struct svc_rqst *rqstp, struct nfsd4_session *ses) 6931d1bc8f2SJ. Bruce Fields { 6941d1bc8f2SJ. Bruce Fields u32 dir = NFS4_CDFC4_FORE; 6951d1bc8f2SJ. Bruce Fields 6961d1bc8f2SJ. Bruce Fields if (ses->se_flags & SESSION4_BACK_CHAN) 6971d1bc8f2SJ. Bruce Fields dir |= NFS4_CDFC4_BACK; 6981d1bc8f2SJ. Bruce Fields 6991d1bc8f2SJ. Bruce Fields return nfsd4_new_conn(rqstp, ses, dir); 7001d1bc8f2SJ. Bruce Fields } 7011d1bc8f2SJ. Bruce Fields 7021d1bc8f2SJ. Bruce Fields /* must be called under client_lock */ 70319cf5c02SJ. Bruce Fields static void nfsd4_del_conns(struct nfsd4_session *s) 704c7662518SJ. Bruce Fields { 70519cf5c02SJ. Bruce Fields struct nfs4_client *clp = s->se_client; 70619cf5c02SJ. Bruce Fields struct nfsd4_conn *c; 70719cf5c02SJ. Bruce Fields 70819cf5c02SJ. Bruce Fields spin_lock(&clp->cl_lock); 70919cf5c02SJ. Bruce Fields while (!list_empty(&s->se_conns)) { 71019cf5c02SJ. Bruce Fields c = list_first_entry(&s->se_conns, struct nfsd4_conn, cn_persession); 71119cf5c02SJ. Bruce Fields list_del_init(&c->cn_persession); 71219cf5c02SJ. Bruce Fields spin_unlock(&clp->cl_lock); 71319cf5c02SJ. Bruce Fields 71419cf5c02SJ. Bruce Fields unregister_xpt_user(c->cn_xprt, &c->cn_xpt_user); 71519cf5c02SJ. Bruce Fields free_conn(c); 71619cf5c02SJ. Bruce Fields 71719cf5c02SJ. Bruce Fields spin_lock(&clp->cl_lock); 71819cf5c02SJ. Bruce Fields } 71919cf5c02SJ. Bruce Fields spin_unlock(&clp->cl_lock); 720c7662518SJ. Bruce Fields } 721c7662518SJ. Bruce Fields 722c7662518SJ. Bruce Fields void free_session(struct kref *kref) 723c7662518SJ. Bruce Fields { 724c7662518SJ. Bruce Fields struct nfsd4_session *ses; 725c7662518SJ. Bruce Fields int mem; 726c7662518SJ. Bruce Fields 727c7662518SJ. Bruce Fields ses = container_of(kref, struct nfsd4_session, se_ref); 72819cf5c02SJ. Bruce Fields nfsd4_del_conns(ses); 729c7662518SJ. Bruce Fields spin_lock(&nfsd_drc_lock); 730c7662518SJ. Bruce Fields mem = ses->se_fchannel.maxreqs * slot_bytes(&ses->se_fchannel); 731c7662518SJ. Bruce Fields nfsd_drc_mem_used -= mem; 732c7662518SJ. Bruce Fields spin_unlock(&nfsd_drc_lock); 733c7662518SJ. Bruce Fields free_session_slots(ses); 734c7662518SJ. Bruce Fields kfree(ses); 735c7662518SJ. Bruce Fields } 736c7662518SJ. Bruce Fields 737ac7c46f2SJ. Bruce Fields static struct nfsd4_session *alloc_init_session(struct svc_rqst *rqstp, struct nfs4_client *clp, struct nfsd4_create_session *cses) 7385b6feee9SJ. Bruce Fields { 7395b6feee9SJ. Bruce Fields struct nfsd4_session *new; 7405b6feee9SJ. Bruce Fields struct nfsd4_channel_attrs *fchan = &cses->fore_channel; 7415b6feee9SJ. Bruce Fields int numslots, slotsize; 742c7662518SJ. Bruce Fields int status; 7435b6feee9SJ. Bruce Fields int idx; 7445b6feee9SJ. Bruce Fields 7455b6feee9SJ. Bruce Fields /* 7465b6feee9SJ. Bruce Fields * Note decreasing slot size below client's request may 7475b6feee9SJ. Bruce Fields * make it difficult for client to function correctly, whereas 7485b6feee9SJ. Bruce Fields * decreasing the number of slots will (just?) affect 7495b6feee9SJ. Bruce Fields * performance. When short on memory we therefore prefer to 7505b6feee9SJ. Bruce Fields * decrease number of slots instead of their size. 7515b6feee9SJ. Bruce Fields */ 7525b6feee9SJ. Bruce Fields slotsize = nfsd4_sanitize_slot_size(fchan->maxresp_cached); 7535b6feee9SJ. Bruce Fields numslots = nfsd4_get_drc_mem(slotsize, fchan->maxreqs); 754ced6dfe9SMi Jinlong if (numslots < 1) 755ced6dfe9SMi Jinlong return NULL; 7565b6feee9SJ. Bruce Fields 7575b6feee9SJ. Bruce Fields new = alloc_session(slotsize, numslots); 7585b6feee9SJ. Bruce Fields if (!new) { 7595b6feee9SJ. Bruce Fields nfsd4_put_drc_mem(slotsize, fchan->maxreqs); 760ac7c46f2SJ. Bruce Fields return NULL; 7615b6feee9SJ. Bruce Fields } 7625b6feee9SJ. Bruce Fields init_forechannel_attrs(&new->se_fchannel, fchan, numslots, slotsize); 763ec6b5d7bSAndy Adamson 764ec6b5d7bSAndy Adamson new->se_client = clp; 765ec6b5d7bSAndy Adamson gen_sessionid(new); 766ec6b5d7bSAndy Adamson 767c7662518SJ. Bruce Fields INIT_LIST_HEAD(&new->se_conns); 768c7662518SJ. Bruce Fields 769ac7c46f2SJ. Bruce Fields new->se_cb_seq_nr = 1; 770ec6b5d7bSAndy Adamson new->se_flags = cses->flags; 7718b5ce5cdSJ. Bruce Fields new->se_cb_prog = cses->callback_prog; 772ec6b5d7bSAndy Adamson kref_init(&new->se_ref); 7735b6feee9SJ. Bruce Fields idx = hash_sessionid(&new->se_sessionid); 7749089f1b4SBenny Halevy spin_lock(&client_lock); 775ec6b5d7bSAndy Adamson list_add(&new->se_hash, &sessionid_hashtbl[idx]); 7764c649378SJ. Bruce Fields spin_lock(&clp->cl_lock); 777ec6b5d7bSAndy Adamson list_add(&new->se_perclnt, &clp->cl_sessions); 7784c649378SJ. Bruce Fields spin_unlock(&clp->cl_lock); 7799089f1b4SBenny Halevy spin_unlock(&client_lock); 780ec6b5d7bSAndy Adamson 7811d1bc8f2SJ. Bruce Fields status = nfsd4_new_conn_from_crses(rqstp, new); 782ac7c46f2SJ. Bruce Fields /* whoops: benny points out, status is ignored! (err, or bogus) */ 783c7662518SJ. Bruce Fields if (status) { 784c7662518SJ. Bruce Fields free_session(&new->se_ref); 785ac7c46f2SJ. Bruce Fields return NULL; 786c7662518SJ. Bruce Fields } 787dcbeaa68SJ. Bruce Fields if (cses->flags & SESSION4_BACK_CHAN) { 788edd76786SJ. Bruce Fields struct sockaddr *sa = svc_addr(rqstp); 789dcbeaa68SJ. Bruce Fields /* 790dcbeaa68SJ. Bruce Fields * This is a little silly; with sessions there's no real 791dcbeaa68SJ. Bruce Fields * use for the callback address. Use the peer address 792dcbeaa68SJ. Bruce Fields * as a reasonable default for now, but consider fixing 793dcbeaa68SJ. Bruce Fields * the rpc client not to require an address in the 794dcbeaa68SJ. Bruce Fields * future: 795dcbeaa68SJ. Bruce Fields */ 796edd76786SJ. Bruce Fields rpc_copy_addr((struct sockaddr *)&clp->cl_cb_conn.cb_addr, sa); 797edd76786SJ. Bruce Fields clp->cl_cb_conn.cb_addrlen = svc_addr_len(sa); 798edd76786SJ. Bruce Fields } 799dcbeaa68SJ. Bruce Fields nfsd4_probe_callback(clp); 800ac7c46f2SJ. Bruce Fields return new; 801ec6b5d7bSAndy Adamson } 802ec6b5d7bSAndy Adamson 8039089f1b4SBenny Halevy /* caller must hold client_lock */ 8045282fd72SMarc Eshel static struct nfsd4_session * 8055282fd72SMarc Eshel find_in_sessionid_hashtbl(struct nfs4_sessionid *sessionid) 8065282fd72SMarc Eshel { 8075282fd72SMarc Eshel struct nfsd4_session *elem; 8085282fd72SMarc Eshel int idx; 8095282fd72SMarc Eshel 8105282fd72SMarc Eshel dump_sessionid(__func__, sessionid); 8115282fd72SMarc Eshel idx = hash_sessionid(sessionid); 8125282fd72SMarc Eshel /* Search in the appropriate list */ 8135282fd72SMarc Eshel list_for_each_entry(elem, &sessionid_hashtbl[idx], se_hash) { 8145282fd72SMarc Eshel if (!memcmp(elem->se_sessionid.data, sessionid->data, 8155282fd72SMarc Eshel NFS4_MAX_SESSIONID_LEN)) { 8165282fd72SMarc Eshel return elem; 8175282fd72SMarc Eshel } 8185282fd72SMarc Eshel } 8195282fd72SMarc Eshel 8205282fd72SMarc Eshel dprintk("%s: session not found\n", __func__); 8215282fd72SMarc Eshel return NULL; 8225282fd72SMarc Eshel } 8235282fd72SMarc Eshel 8249089f1b4SBenny Halevy /* caller must hold client_lock */ 8257116ed6bSAndy Adamson static void 8265282fd72SMarc Eshel unhash_session(struct nfsd4_session *ses) 8277116ed6bSAndy Adamson { 8287116ed6bSAndy Adamson list_del(&ses->se_hash); 8294c649378SJ. Bruce Fields spin_lock(&ses->se_client->cl_lock); 8307116ed6bSAndy Adamson list_del(&ses->se_perclnt); 8314c649378SJ. Bruce Fields spin_unlock(&ses->se_client->cl_lock); 8325282fd72SMarc Eshel } 8335282fd72SMarc Eshel 83436acb66bSBenny Halevy /* must be called under the client_lock */ 8351da177e4SLinus Torvalds static inline void 83636acb66bSBenny Halevy renew_client_locked(struct nfs4_client *clp) 8371da177e4SLinus Torvalds { 83807cd4909SBenny Halevy if (is_client_expired(clp)) { 83907cd4909SBenny Halevy dprintk("%s: client (clientid %08x/%08x) already expired\n", 84007cd4909SBenny Halevy __func__, 84107cd4909SBenny Halevy clp->cl_clientid.cl_boot, 84207cd4909SBenny Halevy clp->cl_clientid.cl_id); 84307cd4909SBenny Halevy return; 84407cd4909SBenny Halevy } 84507cd4909SBenny Halevy 8461da177e4SLinus Torvalds /* 8471da177e4SLinus Torvalds * Move client to the end to the LRU list. 8481da177e4SLinus Torvalds */ 8491da177e4SLinus Torvalds dprintk("renewing client (clientid %08x/%08x)\n", 8501da177e4SLinus Torvalds clp->cl_clientid.cl_boot, 8511da177e4SLinus Torvalds clp->cl_clientid.cl_id); 8521da177e4SLinus Torvalds list_move_tail(&clp->cl_lru, &client_lru); 8531da177e4SLinus Torvalds clp->cl_time = get_seconds(); 8541da177e4SLinus Torvalds } 8551da177e4SLinus Torvalds 85636acb66bSBenny Halevy static inline void 85736acb66bSBenny Halevy renew_client(struct nfs4_client *clp) 85836acb66bSBenny Halevy { 85936acb66bSBenny Halevy spin_lock(&client_lock); 86036acb66bSBenny Halevy renew_client_locked(clp); 86136acb66bSBenny Halevy spin_unlock(&client_lock); 86236acb66bSBenny Halevy } 86336acb66bSBenny Halevy 8641da177e4SLinus Torvalds /* SETCLIENTID and SETCLIENTID_CONFIRM Helper functions */ 8651da177e4SLinus Torvalds static int 8661da177e4SLinus Torvalds STALE_CLIENTID(clientid_t *clid) 8671da177e4SLinus Torvalds { 8681da177e4SLinus Torvalds if (clid->cl_boot == boot_time) 8691da177e4SLinus Torvalds return 0; 87060adfc50SAndy Adamson dprintk("NFSD stale clientid (%08x/%08x) boot_time %08lx\n", 87160adfc50SAndy Adamson clid->cl_boot, clid->cl_id, boot_time); 8721da177e4SLinus Torvalds return 1; 8731da177e4SLinus Torvalds } 8741da177e4SLinus Torvalds 8751da177e4SLinus Torvalds /* 8761da177e4SLinus Torvalds * XXX Should we use a slab cache ? 8771da177e4SLinus Torvalds * This type of memory management is somewhat inefficient, but we use it 8781da177e4SLinus Torvalds * anyway since SETCLIENTID is not a common operation. 8791da177e4SLinus Torvalds */ 88035bba9a3SJ. Bruce Fields static struct nfs4_client *alloc_client(struct xdr_netobj name) 8811da177e4SLinus Torvalds { 8821da177e4SLinus Torvalds struct nfs4_client *clp; 8831da177e4SLinus Torvalds 88435bba9a3SJ. Bruce Fields clp = kzalloc(sizeof(struct nfs4_client), GFP_KERNEL); 88535bba9a3SJ. Bruce Fields if (clp == NULL) 88635bba9a3SJ. Bruce Fields return NULL; 88735bba9a3SJ. Bruce Fields clp->cl_name.data = kmalloc(name.len, GFP_KERNEL); 88835bba9a3SJ. Bruce Fields if (clp->cl_name.data == NULL) { 88935bba9a3SJ. Bruce Fields kfree(clp); 89035bba9a3SJ. Bruce Fields return NULL; 89135bba9a3SJ. Bruce Fields } 8921da177e4SLinus Torvalds memcpy(clp->cl_name.data, name.data, name.len); 8931da177e4SLinus Torvalds clp->cl_name.len = name.len; 8941da177e4SLinus Torvalds return clp; 8951da177e4SLinus Torvalds } 8961da177e4SLinus Torvalds 8971da177e4SLinus Torvalds static inline void 8981da177e4SLinus Torvalds free_client(struct nfs4_client *clp) 8991da177e4SLinus Torvalds { 900792c95ddSJ. Bruce Fields while (!list_empty(&clp->cl_sessions)) { 901792c95ddSJ. Bruce Fields struct nfsd4_session *ses; 902792c95ddSJ. Bruce Fields ses = list_entry(clp->cl_sessions.next, struct nfsd4_session, 903792c95ddSJ. Bruce Fields se_perclnt); 904792c95ddSJ. Bruce Fields list_del(&ses->se_perclnt); 905792c95ddSJ. Bruce Fields nfsd4_put_session(ses); 906792c95ddSJ. Bruce Fields } 9071da177e4SLinus Torvalds if (clp->cl_cred.cr_group_info) 9081da177e4SLinus Torvalds put_group_info(clp->cl_cred.cr_group_info); 90968e76ad0SOlga Kornievskaia kfree(clp->cl_principal); 9101da177e4SLinus Torvalds kfree(clp->cl_name.data); 9111da177e4SLinus Torvalds kfree(clp); 9121da177e4SLinus Torvalds } 9131da177e4SLinus Torvalds 914d7682988SBenny Halevy void 915d7682988SBenny Halevy release_session_client(struct nfsd4_session *session) 916d7682988SBenny Halevy { 917d7682988SBenny Halevy struct nfs4_client *clp = session->se_client; 918d7682988SBenny Halevy 919d7682988SBenny Halevy if (!atomic_dec_and_lock(&clp->cl_refcount, &client_lock)) 920d7682988SBenny Halevy return; 921d7682988SBenny Halevy if (is_client_expired(clp)) { 922d7682988SBenny Halevy free_client(clp); 923d7682988SBenny Halevy session->se_client = NULL; 924d7682988SBenny Halevy } else 925d7682988SBenny Halevy renew_client_locked(clp); 926d7682988SBenny Halevy spin_unlock(&client_lock); 927d7682988SBenny Halevy } 928d7682988SBenny Halevy 92984d38ac9SBenny Halevy /* must be called under the client_lock */ 93084d38ac9SBenny Halevy static inline void 93184d38ac9SBenny Halevy unhash_client_locked(struct nfs4_client *clp) 93284d38ac9SBenny Halevy { 933792c95ddSJ. Bruce Fields struct nfsd4_session *ses; 934792c95ddSJ. Bruce Fields 93507cd4909SBenny Halevy mark_client_expired(clp); 93684d38ac9SBenny Halevy list_del(&clp->cl_lru); 9374c649378SJ. Bruce Fields spin_lock(&clp->cl_lock); 938792c95ddSJ. Bruce Fields list_for_each_entry(ses, &clp->cl_sessions, se_perclnt) 939792c95ddSJ. Bruce Fields list_del_init(&ses->se_hash); 9404c649378SJ. Bruce Fields spin_unlock(&clp->cl_lock); 94184d38ac9SBenny Halevy } 94284d38ac9SBenny Halevy 9431da177e4SLinus Torvalds static void 9441da177e4SLinus Torvalds expire_client(struct nfs4_client *clp) 9451da177e4SLinus Torvalds { 9461da177e4SLinus Torvalds struct nfs4_stateowner *sop; 9471da177e4SLinus Torvalds struct nfs4_delegation *dp; 9481da177e4SLinus Torvalds struct list_head reaplist; 9491da177e4SLinus Torvalds 9501da177e4SLinus Torvalds INIT_LIST_HEAD(&reaplist); 9511da177e4SLinus Torvalds spin_lock(&recall_lock); 952ea1da636SNeilBrown while (!list_empty(&clp->cl_delegations)) { 953ea1da636SNeilBrown dp = list_entry(clp->cl_delegations.next, struct nfs4_delegation, dl_perclnt); 954ea1da636SNeilBrown list_del_init(&dp->dl_perclnt); 9551da177e4SLinus Torvalds list_move(&dp->dl_recall_lru, &reaplist); 9561da177e4SLinus Torvalds } 9571da177e4SLinus Torvalds spin_unlock(&recall_lock); 9581da177e4SLinus Torvalds while (!list_empty(&reaplist)) { 9591da177e4SLinus Torvalds dp = list_entry(reaplist.next, struct nfs4_delegation, dl_recall_lru); 9601da177e4SLinus Torvalds list_del_init(&dp->dl_recall_lru); 9611da177e4SLinus Torvalds unhash_delegation(dp); 9621da177e4SLinus Torvalds } 963ea1da636SNeilBrown while (!list_empty(&clp->cl_openowners)) { 964ea1da636SNeilBrown sop = list_entry(clp->cl_openowners.next, struct nfs4_stateowner, so_perclient); 965f044ff83SJ. Bruce Fields release_openowner(sop); 9661da177e4SLinus Torvalds } 9676ff8da08SJ. Bruce Fields nfsd4_shutdown_callback(clp); 9682bf23875SJ. Bruce Fields if (clp->cl_cb_conn.cb_xprt) 9692bf23875SJ. Bruce Fields svc_xprt_put(clp->cl_cb_conn.cb_xprt); 97084d38ac9SBenny Halevy list_del(&clp->cl_idhash); 97184d38ac9SBenny Halevy list_del(&clp->cl_strhash); 97284d38ac9SBenny Halevy spin_lock(&client_lock); 97384d38ac9SBenny Halevy unhash_client_locked(clp); 97446583e25SBenny Halevy if (atomic_read(&clp->cl_refcount) == 0) 975b12a05cbSJ. Bruce Fields free_client(clp); 97646583e25SBenny Halevy spin_unlock(&client_lock); 9771da177e4SLinus Torvalds } 9781da177e4SLinus Torvalds 97935bba9a3SJ. Bruce Fields static void copy_verf(struct nfs4_client *target, nfs4_verifier *source) 98035bba9a3SJ. Bruce Fields { 98135bba9a3SJ. Bruce Fields memcpy(target->cl_verifier.data, source->data, 98235bba9a3SJ. Bruce Fields sizeof(target->cl_verifier.data)); 9831da177e4SLinus Torvalds } 9841da177e4SLinus Torvalds 98535bba9a3SJ. Bruce Fields static void copy_clid(struct nfs4_client *target, struct nfs4_client *source) 98635bba9a3SJ. Bruce Fields { 9871da177e4SLinus Torvalds target->cl_clientid.cl_boot = source->cl_clientid.cl_boot; 9881da177e4SLinus Torvalds target->cl_clientid.cl_id = source->cl_clientid.cl_id; 9891da177e4SLinus Torvalds } 9901da177e4SLinus Torvalds 99135bba9a3SJ. Bruce Fields static void copy_cred(struct svc_cred *target, struct svc_cred *source) 99235bba9a3SJ. Bruce Fields { 9931da177e4SLinus Torvalds target->cr_uid = source->cr_uid; 9941da177e4SLinus Torvalds target->cr_gid = source->cr_gid; 9951da177e4SLinus Torvalds target->cr_group_info = source->cr_group_info; 9961da177e4SLinus Torvalds get_group_info(target->cr_group_info); 9971da177e4SLinus Torvalds } 9981da177e4SLinus Torvalds 99935bba9a3SJ. Bruce Fields static int same_name(const char *n1, const char *n2) 1000599e0a22SJ. Bruce Fields { 1001a55370a3SNeilBrown return 0 == memcmp(n1, n2, HEXDIR_LEN); 10021da177e4SLinus Torvalds } 10031da177e4SLinus Torvalds 10041da177e4SLinus Torvalds static int 1005599e0a22SJ. Bruce Fields same_verf(nfs4_verifier *v1, nfs4_verifier *v2) 1006599e0a22SJ. Bruce Fields { 1007599e0a22SJ. Bruce Fields return 0 == memcmp(v1->data, v2->data, sizeof(v1->data)); 10081da177e4SLinus Torvalds } 10091da177e4SLinus Torvalds 10101da177e4SLinus Torvalds static int 1011599e0a22SJ. Bruce Fields same_clid(clientid_t *cl1, clientid_t *cl2) 1012599e0a22SJ. Bruce Fields { 1013599e0a22SJ. Bruce Fields return (cl1->cl_boot == cl2->cl_boot) && (cl1->cl_id == cl2->cl_id); 10141da177e4SLinus Torvalds } 10151da177e4SLinus Torvalds 10161da177e4SLinus Torvalds /* XXX what about NGROUP */ 10171da177e4SLinus Torvalds static int 1018599e0a22SJ. Bruce Fields same_creds(struct svc_cred *cr1, struct svc_cred *cr2) 1019599e0a22SJ. Bruce Fields { 1020599e0a22SJ. Bruce Fields return cr1->cr_uid == cr2->cr_uid; 10211da177e4SLinus Torvalds } 10221da177e4SLinus Torvalds 10235ec7b46cSJ. Bruce Fields static void gen_clid(struct nfs4_client *clp) 10245ec7b46cSJ. Bruce Fields { 10255ec7b46cSJ. Bruce Fields static u32 current_clientid = 1; 10265ec7b46cSJ. Bruce Fields 10271da177e4SLinus Torvalds clp->cl_clientid.cl_boot = boot_time; 10281da177e4SLinus Torvalds clp->cl_clientid.cl_id = current_clientid++; 10291da177e4SLinus Torvalds } 10301da177e4SLinus Torvalds 1031deda2faaSJ. Bruce Fields static void gen_confirm(struct nfs4_client *clp) 1032deda2faaSJ. Bruce Fields { 1033deda2faaSJ. Bruce Fields static u32 i; 10341da177e4SLinus Torvalds u32 *p; 10351da177e4SLinus Torvalds 10361da177e4SLinus Torvalds p = (u32 *)clp->cl_confirm.data; 1037deda2faaSJ. Bruce Fields *p++ = get_seconds(); 1038deda2faaSJ. Bruce Fields *p++ = i++; 10391da177e4SLinus Torvalds } 10401da177e4SLinus Torvalds 1041b09333c4SRicardo Labiaga static struct nfs4_client *create_client(struct xdr_netobj name, char *recdir, 1042b09333c4SRicardo Labiaga struct svc_rqst *rqstp, nfs4_verifier *verf) 1043b09333c4SRicardo Labiaga { 1044b09333c4SRicardo Labiaga struct nfs4_client *clp; 1045b09333c4SRicardo Labiaga struct sockaddr *sa = svc_addr(rqstp); 1046b09333c4SRicardo Labiaga char *princ; 1047b09333c4SRicardo Labiaga 1048b09333c4SRicardo Labiaga clp = alloc_client(name); 1049b09333c4SRicardo Labiaga if (clp == NULL) 1050b09333c4SRicardo Labiaga return NULL; 1051b09333c4SRicardo Labiaga 1052792c95ddSJ. Bruce Fields INIT_LIST_HEAD(&clp->cl_sessions); 1053792c95ddSJ. Bruce Fields 1054b09333c4SRicardo Labiaga princ = svc_gss_principal(rqstp); 1055b09333c4SRicardo Labiaga if (princ) { 1056b09333c4SRicardo Labiaga clp->cl_principal = kstrdup(princ, GFP_KERNEL); 1057b09333c4SRicardo Labiaga if (clp->cl_principal == NULL) { 1058b09333c4SRicardo Labiaga free_client(clp); 1059b09333c4SRicardo Labiaga return NULL; 1060b09333c4SRicardo Labiaga } 1061b09333c4SRicardo Labiaga } 1062b09333c4SRicardo Labiaga 1063b09333c4SRicardo Labiaga memcpy(clp->cl_recdir, recdir, HEXDIR_LEN); 106446583e25SBenny Halevy atomic_set(&clp->cl_refcount, 0); 106577a3569dSJ. Bruce Fields clp->cl_cb_state = NFSD4_CB_UNKNOWN; 1066b09333c4SRicardo Labiaga INIT_LIST_HEAD(&clp->cl_idhash); 1067b09333c4SRicardo Labiaga INIT_LIST_HEAD(&clp->cl_strhash); 1068b09333c4SRicardo Labiaga INIT_LIST_HEAD(&clp->cl_openowners); 1069b09333c4SRicardo Labiaga INIT_LIST_HEAD(&clp->cl_delegations); 1070b09333c4SRicardo Labiaga INIT_LIST_HEAD(&clp->cl_lru); 10715ce8ba25SJ. Bruce Fields INIT_LIST_HEAD(&clp->cl_callbacks); 10726ff8da08SJ. Bruce Fields spin_lock_init(&clp->cl_lock); 1073cee277d9SJ. Bruce Fields INIT_WORK(&clp->cl_cb_null.cb_work, nfsd4_do_callback_rpc); 107407cd4909SBenny Halevy clp->cl_time = get_seconds(); 1075b09333c4SRicardo Labiaga clear_bit(0, &clp->cl_cb_slot_busy); 1076b09333c4SRicardo Labiaga rpc_init_wait_queue(&clp->cl_cb_waitq, "Backchannel slot table"); 1077b09333c4SRicardo Labiaga copy_verf(clp, verf); 1078b09333c4SRicardo Labiaga rpc_copy_addr((struct sockaddr *) &clp->cl_addr, sa); 1079b09333c4SRicardo Labiaga clp->cl_flavor = rqstp->rq_flavor; 1080b09333c4SRicardo Labiaga copy_cred(&clp->cl_cred, &rqstp->rq_cred); 1081b09333c4SRicardo Labiaga gen_confirm(clp); 1082edd76786SJ. Bruce Fields clp->cl_cb_session = NULL; 1083b09333c4SRicardo Labiaga return clp; 1084b09333c4SRicardo Labiaga } 1085b09333c4SRicardo Labiaga 108635bba9a3SJ. Bruce Fields static int check_name(struct xdr_netobj name) 108735bba9a3SJ. Bruce Fields { 10881da177e4SLinus Torvalds if (name.len == 0) 10891da177e4SLinus Torvalds return 0; 10901da177e4SLinus Torvalds if (name.len > NFS4_OPAQUE_LIMIT) { 10912fdada03SJ. Bruce Fields dprintk("NFSD: check_name: name too long(%d)!\n", name.len); 10921da177e4SLinus Torvalds return 0; 10931da177e4SLinus Torvalds } 10941da177e4SLinus Torvalds return 1; 10951da177e4SLinus Torvalds } 10961da177e4SLinus Torvalds 1097fd39ca9aSNeilBrown static void 10981da177e4SLinus Torvalds add_to_unconfirmed(struct nfs4_client *clp, unsigned int strhashval) 10991da177e4SLinus Torvalds { 11001da177e4SLinus Torvalds unsigned int idhashval; 11011da177e4SLinus Torvalds 11021da177e4SLinus Torvalds list_add(&clp->cl_strhash, &unconf_str_hashtbl[strhashval]); 11031da177e4SLinus Torvalds idhashval = clientid_hashval(clp->cl_clientid.cl_id); 11041da177e4SLinus Torvalds list_add(&clp->cl_idhash, &unconf_id_hashtbl[idhashval]); 110536acb66bSBenny Halevy renew_client(clp); 11061da177e4SLinus Torvalds } 11071da177e4SLinus Torvalds 1108fd39ca9aSNeilBrown static void 11091da177e4SLinus Torvalds move_to_confirmed(struct nfs4_client *clp) 11101da177e4SLinus Torvalds { 11111da177e4SLinus Torvalds unsigned int idhashval = clientid_hashval(clp->cl_clientid.cl_id); 11121da177e4SLinus Torvalds unsigned int strhashval; 11131da177e4SLinus Torvalds 11141da177e4SLinus Torvalds dprintk("NFSD: move_to_confirm nfs4_client %p\n", clp); 1115f116629dSAkinobu Mita list_move(&clp->cl_idhash, &conf_id_hashtbl[idhashval]); 1116a55370a3SNeilBrown strhashval = clientstr_hashval(clp->cl_recdir); 1117328efbabSBenny Halevy list_move(&clp->cl_strhash, &conf_str_hashtbl[strhashval]); 11181da177e4SLinus Torvalds renew_client(clp); 11191da177e4SLinus Torvalds } 11201da177e4SLinus Torvalds 11211da177e4SLinus Torvalds static struct nfs4_client * 11221da177e4SLinus Torvalds find_confirmed_client(clientid_t *clid) 11231da177e4SLinus Torvalds { 11241da177e4SLinus Torvalds struct nfs4_client *clp; 11251da177e4SLinus Torvalds unsigned int idhashval = clientid_hashval(clid->cl_id); 11261da177e4SLinus Torvalds 11271da177e4SLinus Torvalds list_for_each_entry(clp, &conf_id_hashtbl[idhashval], cl_idhash) { 1128599e0a22SJ. Bruce Fields if (same_clid(&clp->cl_clientid, clid)) 11291da177e4SLinus Torvalds return clp; 11301da177e4SLinus Torvalds } 11311da177e4SLinus Torvalds return NULL; 11321da177e4SLinus Torvalds } 11331da177e4SLinus Torvalds 11341da177e4SLinus Torvalds static struct nfs4_client * 11351da177e4SLinus Torvalds find_unconfirmed_client(clientid_t *clid) 11361da177e4SLinus Torvalds { 11371da177e4SLinus Torvalds struct nfs4_client *clp; 11381da177e4SLinus Torvalds unsigned int idhashval = clientid_hashval(clid->cl_id); 11391da177e4SLinus Torvalds 11401da177e4SLinus Torvalds list_for_each_entry(clp, &unconf_id_hashtbl[idhashval], cl_idhash) { 1141599e0a22SJ. Bruce Fields if (same_clid(&clp->cl_clientid, clid)) 11421da177e4SLinus Torvalds return clp; 11431da177e4SLinus Torvalds } 11441da177e4SLinus Torvalds return NULL; 11451da177e4SLinus Torvalds } 11461da177e4SLinus Torvalds 11476e5f15c9SJ. Bruce Fields static bool clp_used_exchangeid(struct nfs4_client *clp) 1148a1bcecd2SAndy Adamson { 11496e5f15c9SJ. Bruce Fields return clp->cl_exchange_flags != 0; 1150a1bcecd2SAndy Adamson } 1151a1bcecd2SAndy Adamson 115228ce6054SNeilBrown static struct nfs4_client * 1153e203d506SJ. Bruce Fields find_confirmed_client_by_str(const char *dname, unsigned int hashval) 115428ce6054SNeilBrown { 115528ce6054SNeilBrown struct nfs4_client *clp; 115628ce6054SNeilBrown 115728ce6054SNeilBrown list_for_each_entry(clp, &conf_str_hashtbl[hashval], cl_strhash) { 1158e203d506SJ. Bruce Fields if (same_name(clp->cl_recdir, dname)) 115928ce6054SNeilBrown return clp; 116028ce6054SNeilBrown } 116128ce6054SNeilBrown return NULL; 116228ce6054SNeilBrown } 116328ce6054SNeilBrown 116428ce6054SNeilBrown static struct nfs4_client * 1165e203d506SJ. Bruce Fields find_unconfirmed_client_by_str(const char *dname, unsigned int hashval) 116628ce6054SNeilBrown { 116728ce6054SNeilBrown struct nfs4_client *clp; 116828ce6054SNeilBrown 116928ce6054SNeilBrown list_for_each_entry(clp, &unconf_str_hashtbl[hashval], cl_strhash) { 1170e203d506SJ. Bruce Fields if (same_name(clp->cl_recdir, dname)) 117128ce6054SNeilBrown return clp; 117228ce6054SNeilBrown } 117328ce6054SNeilBrown return NULL; 117428ce6054SNeilBrown } 117528ce6054SNeilBrown 11766f3d772fSTakuma Umeya static void rpc_svcaddr2sockaddr(struct sockaddr *sa, unsigned short family, union svc_addr_u *svcaddr) 11776f3d772fSTakuma Umeya { 11786f3d772fSTakuma Umeya switch (family) { 11796f3d772fSTakuma Umeya case AF_INET: 11806f3d772fSTakuma Umeya ((struct sockaddr_in *)sa)->sin_family = AF_INET; 11816f3d772fSTakuma Umeya ((struct sockaddr_in *)sa)->sin_addr = svcaddr->addr; 11826f3d772fSTakuma Umeya return; 11836f3d772fSTakuma Umeya case AF_INET6: 11846f3d772fSTakuma Umeya ((struct sockaddr_in6 *)sa)->sin6_family = AF_INET6; 11856f3d772fSTakuma Umeya ((struct sockaddr_in6 *)sa)->sin6_addr = svcaddr->addr6; 11866f3d772fSTakuma Umeya return; 11876f3d772fSTakuma Umeya } 11886f3d772fSTakuma Umeya } 11896f3d772fSTakuma Umeya 1190fd39ca9aSNeilBrown static void 11916f3d772fSTakuma Umeya gen_callback(struct nfs4_client *clp, struct nfsd4_setclientid *se, struct svc_rqst *rqstp) 11921da177e4SLinus Torvalds { 119307263f1eSJ. Bruce Fields struct nfs4_cb_conn *conn = &clp->cl_cb_conn; 11946f3d772fSTakuma Umeya struct sockaddr *sa = svc_addr(rqstp); 11956f3d772fSTakuma Umeya u32 scopeid = rpc_get_scope_id(sa); 11967077ecbaSJeff Layton unsigned short expected_family; 11971da177e4SLinus Torvalds 11987077ecbaSJeff Layton /* Currently, we only support tcp and tcp6 for the callback channel */ 11997077ecbaSJeff Layton if (se->se_callback_netid_len == 3 && 12007077ecbaSJeff Layton !memcmp(se->se_callback_netid_val, "tcp", 3)) 12017077ecbaSJeff Layton expected_family = AF_INET; 12027077ecbaSJeff Layton else if (se->se_callback_netid_len == 4 && 12037077ecbaSJeff Layton !memcmp(se->se_callback_netid_val, "tcp6", 4)) 12047077ecbaSJeff Layton expected_family = AF_INET6; 12057077ecbaSJeff Layton else 12061da177e4SLinus Torvalds goto out_err; 12071da177e4SLinus Torvalds 120807263f1eSJ. Bruce Fields conn->cb_addrlen = rpc_uaddr2sockaddr(se->se_callback_addr_val, 1209aa9a4ec7SJeff Layton se->se_callback_addr_len, 121007263f1eSJ. Bruce Fields (struct sockaddr *)&conn->cb_addr, 121107263f1eSJ. Bruce Fields sizeof(conn->cb_addr)); 1212aa9a4ec7SJeff Layton 121307263f1eSJ. Bruce Fields if (!conn->cb_addrlen || conn->cb_addr.ss_family != expected_family) 12141da177e4SLinus Torvalds goto out_err; 1215aa9a4ec7SJeff Layton 121607263f1eSJ. Bruce Fields if (conn->cb_addr.ss_family == AF_INET6) 121707263f1eSJ. Bruce Fields ((struct sockaddr_in6 *)&conn->cb_addr)->sin6_scope_id = scopeid; 1218fbf4665fSJeff Layton 121907263f1eSJ. Bruce Fields conn->cb_prog = se->se_callback_prog; 122007263f1eSJ. Bruce Fields conn->cb_ident = se->se_callback_ident; 12216f3d772fSTakuma Umeya rpc_svcaddr2sockaddr((struct sockaddr *)&conn->cb_saddr, expected_family, &rqstp->rq_daddr); 12221da177e4SLinus Torvalds return; 12231da177e4SLinus Torvalds out_err: 122407263f1eSJ. Bruce Fields conn->cb_addr.ss_family = AF_UNSPEC; 122507263f1eSJ. Bruce Fields conn->cb_addrlen = 0; 1226849823c5SNeil Brown dprintk(KERN_INFO "NFSD: this client (clientid %08x/%08x) " 12271da177e4SLinus Torvalds "will not receive delegations\n", 12281da177e4SLinus Torvalds clp->cl_clientid.cl_boot, clp->cl_clientid.cl_id); 12291da177e4SLinus Torvalds 12301da177e4SLinus Torvalds return; 12311da177e4SLinus Torvalds } 12321da177e4SLinus Torvalds 1233074fe897SAndy Adamson /* 1234557ce264SAndy Adamson * Cache a reply. nfsd4_check_drc_limit() has bounded the cache size. 1235074fe897SAndy Adamson */ 1236074fe897SAndy Adamson void 1237074fe897SAndy Adamson nfsd4_store_cache_entry(struct nfsd4_compoundres *resp) 1238074fe897SAndy Adamson { 1239557ce264SAndy Adamson struct nfsd4_slot *slot = resp->cstate.slot; 1240557ce264SAndy Adamson unsigned int base; 1241074fe897SAndy Adamson 1242557ce264SAndy Adamson dprintk("--> %s slot %p\n", __func__, slot); 1243074fe897SAndy Adamson 1244557ce264SAndy Adamson slot->sl_opcnt = resp->opcnt; 1245557ce264SAndy Adamson slot->sl_status = resp->cstate.status; 1246bf864a31SAndy Adamson 1247bf864a31SAndy Adamson if (nfsd4_not_cached(resp)) { 1248557ce264SAndy Adamson slot->sl_datalen = 0; 1249bf864a31SAndy Adamson return; 1250bf864a31SAndy Adamson } 1251557ce264SAndy Adamson slot->sl_datalen = (char *)resp->p - (char *)resp->cstate.datap; 1252557ce264SAndy Adamson base = (char *)resp->cstate.datap - 1253557ce264SAndy Adamson (char *)resp->xbuf->head[0].iov_base; 1254557ce264SAndy Adamson if (read_bytes_from_xdr_buf(resp->xbuf, base, slot->sl_data, 1255557ce264SAndy Adamson slot->sl_datalen)) 1256557ce264SAndy Adamson WARN("%s: sessions DRC could not cache compound\n", __func__); 1257557ce264SAndy Adamson return; 1258074fe897SAndy Adamson } 1259074fe897SAndy Adamson 1260074fe897SAndy Adamson /* 1261abfabf8cSAndy Adamson * Encode the replay sequence operation from the slot values. 1262abfabf8cSAndy Adamson * If cachethis is FALSE encode the uncached rep error on the next 1263abfabf8cSAndy Adamson * operation which sets resp->p and increments resp->opcnt for 1264abfabf8cSAndy Adamson * nfs4svc_encode_compoundres. 1265abfabf8cSAndy Adamson * 1266074fe897SAndy Adamson */ 1267abfabf8cSAndy Adamson static __be32 1268abfabf8cSAndy Adamson nfsd4_enc_sequence_replay(struct nfsd4_compoundargs *args, 1269abfabf8cSAndy Adamson struct nfsd4_compoundres *resp) 1270074fe897SAndy Adamson { 1271abfabf8cSAndy Adamson struct nfsd4_op *op; 1272abfabf8cSAndy Adamson struct nfsd4_slot *slot = resp->cstate.slot; 1273074fe897SAndy Adamson 1274abfabf8cSAndy Adamson dprintk("--> %s resp->opcnt %d cachethis %u \n", __func__, 1275557ce264SAndy Adamson resp->opcnt, resp->cstate.slot->sl_cachethis); 1276abfabf8cSAndy Adamson 1277abfabf8cSAndy Adamson /* Encode the replayed sequence operation */ 1278abfabf8cSAndy Adamson op = &args->ops[resp->opcnt - 1]; 1279abfabf8cSAndy Adamson nfsd4_encode_operation(resp, op); 1280abfabf8cSAndy Adamson 1281abfabf8cSAndy Adamson /* Return nfserr_retry_uncached_rep in next operation. */ 1282557ce264SAndy Adamson if (args->opcnt > 1 && slot->sl_cachethis == 0) { 1283abfabf8cSAndy Adamson op = &args->ops[resp->opcnt++]; 1284abfabf8cSAndy Adamson op->status = nfserr_retry_uncached_rep; 1285abfabf8cSAndy Adamson nfsd4_encode_operation(resp, op); 1286074fe897SAndy Adamson } 1287abfabf8cSAndy Adamson return op->status; 1288074fe897SAndy Adamson } 1289074fe897SAndy Adamson 1290074fe897SAndy Adamson /* 1291557ce264SAndy Adamson * The sequence operation is not cached because we can use the slot and 1292557ce264SAndy Adamson * session values. 1293074fe897SAndy Adamson */ 1294074fe897SAndy Adamson __be32 1295bf864a31SAndy Adamson nfsd4_replay_cache_entry(struct nfsd4_compoundres *resp, 1296bf864a31SAndy Adamson struct nfsd4_sequence *seq) 1297074fe897SAndy Adamson { 1298557ce264SAndy Adamson struct nfsd4_slot *slot = resp->cstate.slot; 1299074fe897SAndy Adamson __be32 status; 1300074fe897SAndy Adamson 1301557ce264SAndy Adamson dprintk("--> %s slot %p\n", __func__, slot); 1302074fe897SAndy Adamson 1303abfabf8cSAndy Adamson /* Either returns 0 or nfserr_retry_uncached */ 1304abfabf8cSAndy Adamson status = nfsd4_enc_sequence_replay(resp->rqstp->rq_argp, resp); 1305abfabf8cSAndy Adamson if (status == nfserr_retry_uncached_rep) 1306abfabf8cSAndy Adamson return status; 1307074fe897SAndy Adamson 1308557ce264SAndy Adamson /* The sequence operation has been encoded, cstate->datap set. */ 1309557ce264SAndy Adamson memcpy(resp->cstate.datap, slot->sl_data, slot->sl_datalen); 1310074fe897SAndy Adamson 1311557ce264SAndy Adamson resp->opcnt = slot->sl_opcnt; 1312557ce264SAndy Adamson resp->p = resp->cstate.datap + XDR_QUADLEN(slot->sl_datalen); 1313557ce264SAndy Adamson status = slot->sl_status; 1314074fe897SAndy Adamson 1315074fe897SAndy Adamson return status; 1316074fe897SAndy Adamson } 1317074fe897SAndy Adamson 13180733d213SAndy Adamson /* 13190733d213SAndy Adamson * Set the exchange_id flags returned by the server. 13200733d213SAndy Adamson */ 13210733d213SAndy Adamson static void 13220733d213SAndy Adamson nfsd4_set_ex_flags(struct nfs4_client *new, struct nfsd4_exchange_id *clid) 13230733d213SAndy Adamson { 13240733d213SAndy Adamson /* pNFS is not supported */ 13250733d213SAndy Adamson new->cl_exchange_flags |= EXCHGID4_FLAG_USE_NON_PNFS; 13260733d213SAndy Adamson 13270733d213SAndy Adamson /* Referrals are supported, Migration is not. */ 13280733d213SAndy Adamson new->cl_exchange_flags |= EXCHGID4_FLAG_SUPP_MOVED_REFER; 13290733d213SAndy Adamson 13300733d213SAndy Adamson /* set the wire flags to return to client. */ 13310733d213SAndy Adamson clid->flags = new->cl_exchange_flags; 13320733d213SAndy Adamson } 13330733d213SAndy Adamson 1334b37ad28bSAl Viro __be32 1335069b6ad4SAndy Adamson nfsd4_exchange_id(struct svc_rqst *rqstp, 1336069b6ad4SAndy Adamson struct nfsd4_compound_state *cstate, 1337069b6ad4SAndy Adamson struct nfsd4_exchange_id *exid) 1338069b6ad4SAndy Adamson { 13390733d213SAndy Adamson struct nfs4_client *unconf, *conf, *new; 13400733d213SAndy Adamson int status; 13410733d213SAndy Adamson unsigned int strhashval; 13420733d213SAndy Adamson char dname[HEXDIR_LEN]; 1343363168b4SJeff Layton char addr_str[INET6_ADDRSTRLEN]; 13440733d213SAndy Adamson nfs4_verifier verf = exid->verifier; 1345363168b4SJeff Layton struct sockaddr *sa = svc_addr(rqstp); 13460733d213SAndy Adamson 1347363168b4SJeff Layton rpc_ntop(sa, addr_str, sizeof(addr_str)); 13480733d213SAndy Adamson dprintk("%s rqstp=%p exid=%p clname.len=%u clname.data=%p " 1349363168b4SJeff Layton "ip_addr=%s flags %x, spa_how %d\n", 13500733d213SAndy Adamson __func__, rqstp, exid, exid->clname.len, exid->clname.data, 1351363168b4SJeff Layton addr_str, exid->flags, exid->spa_how); 13520733d213SAndy Adamson 13530733d213SAndy Adamson if (!check_name(exid->clname) || (exid->flags & ~EXCHGID4_FLAG_MASK_A)) 13540733d213SAndy Adamson return nfserr_inval; 13550733d213SAndy Adamson 13560733d213SAndy Adamson /* Currently only support SP4_NONE */ 13570733d213SAndy Adamson switch (exid->spa_how) { 13580733d213SAndy Adamson case SP4_NONE: 13590733d213SAndy Adamson break; 13600733d213SAndy Adamson case SP4_SSV: 1361044bc1d4SJ. Bruce Fields return nfserr_serverfault; 13620733d213SAndy Adamson default: 13630733d213SAndy Adamson BUG(); /* checked by xdr code */ 13640733d213SAndy Adamson case SP4_MACH_CRED: 13650733d213SAndy Adamson return nfserr_serverfault; /* no excuse :-/ */ 13660733d213SAndy Adamson } 13670733d213SAndy Adamson 13680733d213SAndy Adamson status = nfs4_make_rec_clidname(dname, &exid->clname); 13690733d213SAndy Adamson 13700733d213SAndy Adamson if (status) 13710733d213SAndy Adamson goto error; 13720733d213SAndy Adamson 13730733d213SAndy Adamson strhashval = clientstr_hashval(dname); 13740733d213SAndy Adamson 13750733d213SAndy Adamson nfs4_lock_state(); 13760733d213SAndy Adamson status = nfs_ok; 13770733d213SAndy Adamson 1378e203d506SJ. Bruce Fields conf = find_confirmed_client_by_str(dname, strhashval); 13790733d213SAndy Adamson if (conf) { 1380e203d506SJ. Bruce Fields if (!clp_used_exchangeid(conf)) { 1381e203d506SJ. Bruce Fields status = nfserr_clid_inuse; /* XXX: ? */ 1382e203d506SJ. Bruce Fields goto out; 1383e203d506SJ. Bruce Fields } 13840733d213SAndy Adamson if (!same_verf(&verf, &conf->cl_verifier)) { 13850733d213SAndy Adamson /* 18.35.4 case 8 */ 13860733d213SAndy Adamson if (exid->flags & EXCHGID4_FLAG_UPD_CONFIRMED_REC_A) { 13870733d213SAndy Adamson status = nfserr_not_same; 13880733d213SAndy Adamson goto out; 13890733d213SAndy Adamson } 13900733d213SAndy Adamson /* Client reboot: destroy old state */ 13910733d213SAndy Adamson expire_client(conf); 13920733d213SAndy Adamson goto out_new; 13930733d213SAndy Adamson } 13940733d213SAndy Adamson if (!same_creds(&conf->cl_cred, &rqstp->rq_cred)) { 13950733d213SAndy Adamson /* 18.35.4 case 9 */ 13960733d213SAndy Adamson if (exid->flags & EXCHGID4_FLAG_UPD_CONFIRMED_REC_A) { 13970733d213SAndy Adamson status = nfserr_perm; 13980733d213SAndy Adamson goto out; 13990733d213SAndy Adamson } 14000733d213SAndy Adamson expire_client(conf); 14010733d213SAndy Adamson goto out_new; 14020733d213SAndy Adamson } 14030733d213SAndy Adamson /* 14040733d213SAndy Adamson * Set bit when the owner id and verifier map to an already 14050733d213SAndy Adamson * confirmed client id (18.35.3). 14060733d213SAndy Adamson */ 14070733d213SAndy Adamson exid->flags |= EXCHGID4_FLAG_CONFIRMED_R; 14080733d213SAndy Adamson 14090733d213SAndy Adamson /* 14100733d213SAndy Adamson * Falling into 18.35.4 case 2, possible router replay. 14110733d213SAndy Adamson * Leave confirmed record intact and return same result. 14120733d213SAndy Adamson */ 14130733d213SAndy Adamson copy_verf(conf, &verf); 14140733d213SAndy Adamson new = conf; 14150733d213SAndy Adamson goto out_copy; 14166ddbbbfeSMike Sager } 14176ddbbbfeSMike Sager 14180733d213SAndy Adamson /* 18.35.4 case 7 */ 14190733d213SAndy Adamson if (exid->flags & EXCHGID4_FLAG_UPD_CONFIRMED_REC_A) { 14200733d213SAndy Adamson status = nfserr_noent; 14210733d213SAndy Adamson goto out; 14220733d213SAndy Adamson } 14230733d213SAndy Adamson 1424e203d506SJ. Bruce Fields unconf = find_unconfirmed_client_by_str(dname, strhashval); 14250733d213SAndy Adamson if (unconf) { 14260733d213SAndy Adamson /* 14270733d213SAndy Adamson * Possible retry or client restart. Per 18.35.4 case 4, 14280733d213SAndy Adamson * a new unconfirmed record should be generated regardless 14290733d213SAndy Adamson * of whether any properties have changed. 14300733d213SAndy Adamson */ 14310733d213SAndy Adamson expire_client(unconf); 14320733d213SAndy Adamson } 14330733d213SAndy Adamson 14340733d213SAndy Adamson out_new: 14350733d213SAndy Adamson /* Normal case */ 1436b09333c4SRicardo Labiaga new = create_client(exid->clname, dname, rqstp, &verf); 14370733d213SAndy Adamson if (new == NULL) { 14384731030dSJ. Bruce Fields status = nfserr_jukebox; 14390733d213SAndy Adamson goto out; 14400733d213SAndy Adamson } 14410733d213SAndy Adamson 14420733d213SAndy Adamson gen_clid(new); 14430733d213SAndy Adamson add_to_unconfirmed(new, strhashval); 14440733d213SAndy Adamson out_copy: 14450733d213SAndy Adamson exid->clientid.cl_boot = new->cl_clientid.cl_boot; 14460733d213SAndy Adamson exid->clientid.cl_id = new->cl_clientid.cl_id; 14470733d213SAndy Adamson 144838eb76a5SAndy Adamson exid->seqid = 1; 14490733d213SAndy Adamson nfsd4_set_ex_flags(new, exid); 14500733d213SAndy Adamson 14510733d213SAndy Adamson dprintk("nfsd4_exchange_id seqid %d flags %x\n", 145249557cc7SAndy Adamson new->cl_cs_slot.sl_seqid, new->cl_exchange_flags); 14530733d213SAndy Adamson status = nfs_ok; 14540733d213SAndy Adamson 14550733d213SAndy Adamson out: 14560733d213SAndy Adamson nfs4_unlock_state(); 14570733d213SAndy Adamson error: 14580733d213SAndy Adamson dprintk("nfsd4_exchange_id returns %d\n", ntohl(status)); 14590733d213SAndy Adamson return status; 1460069b6ad4SAndy Adamson } 1461069b6ad4SAndy Adamson 1462b85d4c01SBenny Halevy static int 146388e588d5SAndy Adamson check_slot_seqid(u32 seqid, u32 slot_seqid, int slot_inuse) 1464b85d4c01SBenny Halevy { 146588e588d5SAndy Adamson dprintk("%s enter. seqid %d slot_seqid %d\n", __func__, seqid, 146688e588d5SAndy Adamson slot_seqid); 1467b85d4c01SBenny Halevy 1468b85d4c01SBenny Halevy /* The slot is in use, and no response has been sent. */ 146988e588d5SAndy Adamson if (slot_inuse) { 147088e588d5SAndy Adamson if (seqid == slot_seqid) 1471b85d4c01SBenny Halevy return nfserr_jukebox; 1472b85d4c01SBenny Halevy else 1473b85d4c01SBenny Halevy return nfserr_seq_misordered; 1474b85d4c01SBenny Halevy } 1475b85d4c01SBenny Halevy /* Normal */ 147688e588d5SAndy Adamson if (likely(seqid == slot_seqid + 1)) 1477b85d4c01SBenny Halevy return nfs_ok; 1478b85d4c01SBenny Halevy /* Replay */ 147988e588d5SAndy Adamson if (seqid == slot_seqid) 1480b85d4c01SBenny Halevy return nfserr_replay_cache; 1481b85d4c01SBenny Halevy /* Wraparound */ 148288e588d5SAndy Adamson if (seqid == 1 && (slot_seqid + 1) == 0) 1483b85d4c01SBenny Halevy return nfs_ok; 1484b85d4c01SBenny Halevy /* Misordered replay or misordered new request */ 1485b85d4c01SBenny Halevy return nfserr_seq_misordered; 1486b85d4c01SBenny Halevy } 1487b85d4c01SBenny Halevy 148849557cc7SAndy Adamson /* 148949557cc7SAndy Adamson * Cache the create session result into the create session single DRC 149049557cc7SAndy Adamson * slot cache by saving the xdr structure. sl_seqid has been set. 149149557cc7SAndy Adamson * Do this for solo or embedded create session operations. 149249557cc7SAndy Adamson */ 149349557cc7SAndy Adamson static void 149449557cc7SAndy Adamson nfsd4_cache_create_session(struct nfsd4_create_session *cr_ses, 149549557cc7SAndy Adamson struct nfsd4_clid_slot *slot, int nfserr) 149649557cc7SAndy Adamson { 149749557cc7SAndy Adamson slot->sl_status = nfserr; 149849557cc7SAndy Adamson memcpy(&slot->sl_cr_ses, cr_ses, sizeof(*cr_ses)); 149949557cc7SAndy Adamson } 150049557cc7SAndy Adamson 150149557cc7SAndy Adamson static __be32 150249557cc7SAndy Adamson nfsd4_replay_create_session(struct nfsd4_create_session *cr_ses, 150349557cc7SAndy Adamson struct nfsd4_clid_slot *slot) 150449557cc7SAndy Adamson { 150549557cc7SAndy Adamson memcpy(cr_ses, &slot->sl_cr_ses, sizeof(*cr_ses)); 150649557cc7SAndy Adamson return slot->sl_status; 150749557cc7SAndy Adamson } 150849557cc7SAndy Adamson 1509069b6ad4SAndy Adamson __be32 1510069b6ad4SAndy Adamson nfsd4_create_session(struct svc_rqst *rqstp, 1511069b6ad4SAndy Adamson struct nfsd4_compound_state *cstate, 1512069b6ad4SAndy Adamson struct nfsd4_create_session *cr_ses) 1513069b6ad4SAndy Adamson { 1514363168b4SJeff Layton struct sockaddr *sa = svc_addr(rqstp); 1515ec6b5d7bSAndy Adamson struct nfs4_client *conf, *unconf; 1516ac7c46f2SJ. Bruce Fields struct nfsd4_session *new; 151749557cc7SAndy Adamson struct nfsd4_clid_slot *cs_slot = NULL; 151886c3e16cSJ. Bruce Fields bool confirm_me = false; 1519ec6b5d7bSAndy Adamson int status = 0; 1520ec6b5d7bSAndy Adamson 1521ec6b5d7bSAndy Adamson nfs4_lock_state(); 1522ec6b5d7bSAndy Adamson unconf = find_unconfirmed_client(&cr_ses->clientid); 1523ec6b5d7bSAndy Adamson conf = find_confirmed_client(&cr_ses->clientid); 1524ec6b5d7bSAndy Adamson 1525ec6b5d7bSAndy Adamson if (conf) { 152649557cc7SAndy Adamson cs_slot = &conf->cl_cs_slot; 152749557cc7SAndy Adamson status = check_slot_seqid(cr_ses->seqid, cs_slot->sl_seqid, 0); 152838eb76a5SAndy Adamson if (status == nfserr_replay_cache) { 1529ec6b5d7bSAndy Adamson dprintk("Got a create_session replay! seqid= %d\n", 153049557cc7SAndy Adamson cs_slot->sl_seqid); 153138eb76a5SAndy Adamson /* Return the cached reply status */ 153249557cc7SAndy Adamson status = nfsd4_replay_create_session(cr_ses, cs_slot); 153338eb76a5SAndy Adamson goto out; 153449557cc7SAndy Adamson } else if (cr_ses->seqid != cs_slot->sl_seqid + 1) { 1535ec6b5d7bSAndy Adamson status = nfserr_seq_misordered; 1536ec6b5d7bSAndy Adamson dprintk("Sequence misordered!\n"); 1537ec6b5d7bSAndy Adamson dprintk("Expected seqid= %d but got seqid= %d\n", 153849557cc7SAndy Adamson cs_slot->sl_seqid, cr_ses->seqid); 1539ec6b5d7bSAndy Adamson goto out; 1540ec6b5d7bSAndy Adamson } 1541ec6b5d7bSAndy Adamson } else if (unconf) { 1542ec6b5d7bSAndy Adamson if (!same_creds(&unconf->cl_cred, &rqstp->rq_cred) || 1543363168b4SJeff Layton !rpc_cmp_addr(sa, (struct sockaddr *) &unconf->cl_addr)) { 1544ec6b5d7bSAndy Adamson status = nfserr_clid_inuse; 1545ec6b5d7bSAndy Adamson goto out; 1546ec6b5d7bSAndy Adamson } 1547ec6b5d7bSAndy Adamson 154849557cc7SAndy Adamson cs_slot = &unconf->cl_cs_slot; 154949557cc7SAndy Adamson status = check_slot_seqid(cr_ses->seqid, cs_slot->sl_seqid, 0); 155038eb76a5SAndy Adamson if (status) { 155138eb76a5SAndy Adamson /* an unconfirmed replay returns misordered */ 1552ec6b5d7bSAndy Adamson status = nfserr_seq_misordered; 1553cd5b8144SJ. Bruce Fields goto out; 1554ec6b5d7bSAndy Adamson } 1555ec6b5d7bSAndy Adamson 155686c3e16cSJ. Bruce Fields confirm_me = true; 1557ec6b5d7bSAndy Adamson conf = unconf; 1558ec6b5d7bSAndy Adamson } else { 1559ec6b5d7bSAndy Adamson status = nfserr_stale_clientid; 1560ec6b5d7bSAndy Adamson goto out; 1561ec6b5d7bSAndy Adamson } 1562ec6b5d7bSAndy Adamson 1563408b79bcSJ. Bruce Fields /* 15648323c3b2SJ. Bruce Fields * XXX: we should probably set this at creation time, and check 15658323c3b2SJ. Bruce Fields * for consistent minorversion use throughout: 15668323c3b2SJ. Bruce Fields */ 15678323c3b2SJ. Bruce Fields conf->cl_minorversion = 1; 15688323c3b2SJ. Bruce Fields /* 1569408b79bcSJ. Bruce Fields * We do not support RDMA or persistent sessions 1570408b79bcSJ. Bruce Fields */ 1571408b79bcSJ. Bruce Fields cr_ses->flags &= ~SESSION4_PERSIST; 1572408b79bcSJ. Bruce Fields cr_ses->flags &= ~SESSION4_RDMA; 1573408b79bcSJ. Bruce Fields 1574ac7c46f2SJ. Bruce Fields status = nfserr_jukebox; 1575ac7c46f2SJ. Bruce Fields new = alloc_init_session(rqstp, conf, cr_ses); 1576ac7c46f2SJ. Bruce Fields if (!new) 1577ec6b5d7bSAndy Adamson goto out; 1578ac7c46f2SJ. Bruce Fields status = nfs_ok; 1579ac7c46f2SJ. Bruce Fields memcpy(cr_ses->sessionid.data, new->se_sessionid.data, 1580ec6b5d7bSAndy Adamson NFS4_MAX_SESSIONID_LEN); 158112050657SMi Jinlong memcpy(&cr_ses->fore_channel, &new->se_fchannel, 158212050657SMi Jinlong sizeof(struct nfsd4_channel_attrs)); 158386c3e16cSJ. Bruce Fields cs_slot->sl_seqid++; 158449557cc7SAndy Adamson cr_ses->seqid = cs_slot->sl_seqid; 1585ec6b5d7bSAndy Adamson 158649557cc7SAndy Adamson /* cache solo and embedded create sessions under the state lock */ 158749557cc7SAndy Adamson nfsd4_cache_create_session(cr_ses, cs_slot, status); 158886c3e16cSJ. Bruce Fields if (confirm_me) 158986c3e16cSJ. Bruce Fields move_to_confirmed(conf); 1590ec6b5d7bSAndy Adamson out: 1591ec6b5d7bSAndy Adamson nfs4_unlock_state(); 1592ec6b5d7bSAndy Adamson dprintk("%s returns %d\n", __func__, ntohl(status)); 1593ec6b5d7bSAndy Adamson return status; 1594069b6ad4SAndy Adamson } 1595069b6ad4SAndy Adamson 159657716355SJ. Bruce Fields static bool nfsd4_last_compound_op(struct svc_rqst *rqstp) 159757716355SJ. Bruce Fields { 159857716355SJ. Bruce Fields struct nfsd4_compoundres *resp = rqstp->rq_resp; 159957716355SJ. Bruce Fields struct nfsd4_compoundargs *argp = rqstp->rq_argp; 160057716355SJ. Bruce Fields 160157716355SJ. Bruce Fields return argp->opcnt == resp->opcnt; 160257716355SJ. Bruce Fields } 160357716355SJ. Bruce Fields 16041d1bc8f2SJ. Bruce Fields static __be32 nfsd4_map_bcts_dir(u32 *dir) 16051d1bc8f2SJ. Bruce Fields { 16061d1bc8f2SJ. Bruce Fields switch (*dir) { 16071d1bc8f2SJ. Bruce Fields case NFS4_CDFC4_FORE: 16081d1bc8f2SJ. Bruce Fields case NFS4_CDFC4_BACK: 16091d1bc8f2SJ. Bruce Fields return nfs_ok; 16101d1bc8f2SJ. Bruce Fields case NFS4_CDFC4_FORE_OR_BOTH: 16111d1bc8f2SJ. Bruce Fields case NFS4_CDFC4_BACK_OR_BOTH: 16121d1bc8f2SJ. Bruce Fields *dir = NFS4_CDFC4_BOTH; 16131d1bc8f2SJ. Bruce Fields return nfs_ok; 16141d1bc8f2SJ. Bruce Fields }; 16151d1bc8f2SJ. Bruce Fields return nfserr_inval; 16161d1bc8f2SJ. Bruce Fields } 16171d1bc8f2SJ. Bruce Fields 16181d1bc8f2SJ. Bruce Fields __be32 nfsd4_bind_conn_to_session(struct svc_rqst *rqstp, 16191d1bc8f2SJ. Bruce Fields struct nfsd4_compound_state *cstate, 16201d1bc8f2SJ. Bruce Fields struct nfsd4_bind_conn_to_session *bcts) 16211d1bc8f2SJ. Bruce Fields { 16221d1bc8f2SJ. Bruce Fields __be32 status; 16231d1bc8f2SJ. Bruce Fields 16241d1bc8f2SJ. Bruce Fields if (!nfsd4_last_compound_op(rqstp)) 16251d1bc8f2SJ. Bruce Fields return nfserr_not_only_op; 16261d1bc8f2SJ. Bruce Fields spin_lock(&client_lock); 16271d1bc8f2SJ. Bruce Fields cstate->session = find_in_sessionid_hashtbl(&bcts->sessionid); 16281d1bc8f2SJ. Bruce Fields /* Sorta weird: we only need the refcnt'ing because new_conn acquires 16291d1bc8f2SJ. Bruce Fields * client_lock iself: */ 16301d1bc8f2SJ. Bruce Fields if (cstate->session) { 16311d1bc8f2SJ. Bruce Fields nfsd4_get_session(cstate->session); 16321d1bc8f2SJ. Bruce Fields atomic_inc(&cstate->session->se_client->cl_refcount); 16331d1bc8f2SJ. Bruce Fields } 16341d1bc8f2SJ. Bruce Fields spin_unlock(&client_lock); 16351d1bc8f2SJ. Bruce Fields if (!cstate->session) 16361d1bc8f2SJ. Bruce Fields return nfserr_badsession; 16371d1bc8f2SJ. Bruce Fields 16381d1bc8f2SJ. Bruce Fields status = nfsd4_map_bcts_dir(&bcts->dir); 16391d1bc8f2SJ. Bruce Fields nfsd4_new_conn(rqstp, cstate->session, bcts->dir); 16401d1bc8f2SJ. Bruce Fields return nfs_ok; 16411d1bc8f2SJ. Bruce Fields } 16421d1bc8f2SJ. Bruce Fields 16435d4cec2fSJ. Bruce Fields static bool nfsd4_compound_in_session(struct nfsd4_session *session, struct nfs4_sessionid *sid) 16445d4cec2fSJ. Bruce Fields { 16455d4cec2fSJ. Bruce Fields if (!session) 16465d4cec2fSJ. Bruce Fields return 0; 16475d4cec2fSJ. Bruce Fields return !memcmp(sid, &session->se_sessionid, sizeof(*sid)); 16485d4cec2fSJ. Bruce Fields } 16495d4cec2fSJ. Bruce Fields 1650069b6ad4SAndy Adamson __be32 1651069b6ad4SAndy Adamson nfsd4_destroy_session(struct svc_rqst *r, 1652069b6ad4SAndy Adamson struct nfsd4_compound_state *cstate, 1653069b6ad4SAndy Adamson struct nfsd4_destroy_session *sessionid) 1654069b6ad4SAndy Adamson { 1655e10e0cfcSBenny Halevy struct nfsd4_session *ses; 1656e10e0cfcSBenny Halevy u32 status = nfserr_badsession; 1657e10e0cfcSBenny Halevy 1658e10e0cfcSBenny Halevy /* Notes: 1659e10e0cfcSBenny Halevy * - The confirmed nfs4_client->cl_sessionid holds destroyed sessinid 1660e10e0cfcSBenny Halevy * - Should we return nfserr_back_chan_busy if waiting for 1661e10e0cfcSBenny Halevy * callbacks on to-be-destroyed session? 1662e10e0cfcSBenny Halevy * - Do we need to clear any callback info from previous session? 1663e10e0cfcSBenny Halevy */ 1664e10e0cfcSBenny Halevy 16655d4cec2fSJ. Bruce Fields if (nfsd4_compound_in_session(cstate->session, &sessionid->sessionid)) { 166657716355SJ. Bruce Fields if (!nfsd4_last_compound_op(r)) 166757716355SJ. Bruce Fields return nfserr_not_only_op; 166857716355SJ. Bruce Fields } 1669e10e0cfcSBenny Halevy dump_sessionid(__func__, &sessionid->sessionid); 16709089f1b4SBenny Halevy spin_lock(&client_lock); 1671e10e0cfcSBenny Halevy ses = find_in_sessionid_hashtbl(&sessionid->sessionid); 1672e10e0cfcSBenny Halevy if (!ses) { 16739089f1b4SBenny Halevy spin_unlock(&client_lock); 1674e10e0cfcSBenny Halevy goto out; 1675e10e0cfcSBenny Halevy } 1676e10e0cfcSBenny Halevy 1677e10e0cfcSBenny Halevy unhash_session(ses); 16789089f1b4SBenny Halevy spin_unlock(&client_lock); 1679e10e0cfcSBenny Halevy 1680ab707e15SBenny Halevy nfs4_lock_state(); 168184f5f7ccSJ. Bruce Fields nfsd4_probe_callback_sync(ses->se_client); 1682ab707e15SBenny Halevy nfs4_unlock_state(); 168319cf5c02SJ. Bruce Fields 168419cf5c02SJ. Bruce Fields nfsd4_del_conns(ses); 168519cf5c02SJ. Bruce Fields 1686e10e0cfcSBenny Halevy nfsd4_put_session(ses); 1687e10e0cfcSBenny Halevy status = nfs_ok; 1688e10e0cfcSBenny Halevy out: 1689e10e0cfcSBenny Halevy dprintk("%s returns %d\n", __func__, ntohl(status)); 1690e10e0cfcSBenny Halevy return status; 1691069b6ad4SAndy Adamson } 1692069b6ad4SAndy Adamson 1693a663bdd8SJ. Bruce Fields static struct nfsd4_conn *__nfsd4_find_conn(struct svc_xprt *xpt, struct nfsd4_session *s) 1694328ead28SJ. Bruce Fields { 1695328ead28SJ. Bruce Fields struct nfsd4_conn *c; 1696328ead28SJ. Bruce Fields 1697328ead28SJ. Bruce Fields list_for_each_entry(c, &s->se_conns, cn_persession) { 1698a663bdd8SJ. Bruce Fields if (c->cn_xprt == xpt) { 1699328ead28SJ. Bruce Fields return c; 1700328ead28SJ. Bruce Fields } 1701328ead28SJ. Bruce Fields } 1702328ead28SJ. Bruce Fields return NULL; 1703328ead28SJ. Bruce Fields } 1704328ead28SJ. Bruce Fields 1705a663bdd8SJ. Bruce Fields static void nfsd4_sequence_check_conn(struct nfsd4_conn *new, struct nfsd4_session *ses) 1706328ead28SJ. Bruce Fields { 1707328ead28SJ. Bruce Fields struct nfs4_client *clp = ses->se_client; 1708a663bdd8SJ. Bruce Fields struct nfsd4_conn *c; 170921b75b01SJ. Bruce Fields int ret; 1710328ead28SJ. Bruce Fields 1711328ead28SJ. Bruce Fields spin_lock(&clp->cl_lock); 1712a663bdd8SJ. Bruce Fields c = __nfsd4_find_conn(new->cn_xprt, ses); 1713328ead28SJ. Bruce Fields if (c) { 1714328ead28SJ. Bruce Fields spin_unlock(&clp->cl_lock); 1715328ead28SJ. Bruce Fields free_conn(new); 1716328ead28SJ. Bruce Fields return; 1717328ead28SJ. Bruce Fields } 1718328ead28SJ. Bruce Fields __nfsd4_hash_conn(new, ses); 1719328ead28SJ. Bruce Fields spin_unlock(&clp->cl_lock); 172021b75b01SJ. Bruce Fields ret = nfsd4_register_conn(new); 172121b75b01SJ. Bruce Fields if (ret) 172221b75b01SJ. Bruce Fields /* oops; xprt is already down: */ 172321b75b01SJ. Bruce Fields nfsd4_conn_lost(&new->cn_xpt_user); 1724328ead28SJ. Bruce Fields return; 1725328ead28SJ. Bruce Fields } 1726328ead28SJ. Bruce Fields 1727069b6ad4SAndy Adamson __be32 1728b85d4c01SBenny Halevy nfsd4_sequence(struct svc_rqst *rqstp, 1729069b6ad4SAndy Adamson struct nfsd4_compound_state *cstate, 1730069b6ad4SAndy Adamson struct nfsd4_sequence *seq) 1731069b6ad4SAndy Adamson { 1732f9bb94c4SAndy Adamson struct nfsd4_compoundres *resp = rqstp->rq_resp; 1733b85d4c01SBenny Halevy struct nfsd4_session *session; 1734b85d4c01SBenny Halevy struct nfsd4_slot *slot; 1735a663bdd8SJ. Bruce Fields struct nfsd4_conn *conn; 1736b85d4c01SBenny Halevy int status; 1737b85d4c01SBenny Halevy 1738f9bb94c4SAndy Adamson if (resp->opcnt != 1) 1739f9bb94c4SAndy Adamson return nfserr_sequence_pos; 1740f9bb94c4SAndy Adamson 1741a663bdd8SJ. Bruce Fields /* 1742a663bdd8SJ. Bruce Fields * Will be either used or freed by nfsd4_sequence_check_conn 1743a663bdd8SJ. Bruce Fields * below. 1744a663bdd8SJ. Bruce Fields */ 1745a663bdd8SJ. Bruce Fields conn = alloc_conn(rqstp, NFS4_CDFC4_FORE); 1746a663bdd8SJ. Bruce Fields if (!conn) 1747a663bdd8SJ. Bruce Fields return nfserr_jukebox; 1748a663bdd8SJ. Bruce Fields 17499089f1b4SBenny Halevy spin_lock(&client_lock); 1750b85d4c01SBenny Halevy status = nfserr_badsession; 1751b85d4c01SBenny Halevy session = find_in_sessionid_hashtbl(&seq->sessionid); 1752b85d4c01SBenny Halevy if (!session) 1753b85d4c01SBenny Halevy goto out; 1754b85d4c01SBenny Halevy 1755b85d4c01SBenny Halevy status = nfserr_badslot; 17566c18ba9fSAlexandros Batsakis if (seq->slotid >= session->se_fchannel.maxreqs) 1757b85d4c01SBenny Halevy goto out; 1758b85d4c01SBenny Halevy 1759557ce264SAndy Adamson slot = session->se_slots[seq->slotid]; 1760b85d4c01SBenny Halevy dprintk("%s: slotid %d\n", __func__, seq->slotid); 1761b85d4c01SBenny Halevy 1762a8dfdaebSAndy Adamson /* We do not negotiate the number of slots yet, so set the 1763a8dfdaebSAndy Adamson * maxslots to the session maxreqs which is used to encode 1764a8dfdaebSAndy Adamson * sr_highest_slotid and the sr_target_slot id to maxslots */ 1765a8dfdaebSAndy Adamson seq->maxslots = session->se_fchannel.maxreqs; 1766a8dfdaebSAndy Adamson 176788e588d5SAndy Adamson status = check_slot_seqid(seq->seqid, slot->sl_seqid, slot->sl_inuse); 1768b85d4c01SBenny Halevy if (status == nfserr_replay_cache) { 1769b85d4c01SBenny Halevy cstate->slot = slot; 1770b85d4c01SBenny Halevy cstate->session = session; 1771da3846a2SAndy Adamson /* Return the cached reply status and set cstate->status 1772557ce264SAndy Adamson * for nfsd4_proc_compound processing */ 1773bf864a31SAndy Adamson status = nfsd4_replay_cache_entry(resp, seq); 1774da3846a2SAndy Adamson cstate->status = nfserr_replay_cache; 1775aaf84eb9SBenny Halevy goto out; 1776b85d4c01SBenny Halevy } 1777b85d4c01SBenny Halevy if (status) 1778b85d4c01SBenny Halevy goto out; 1779b85d4c01SBenny Halevy 1780a663bdd8SJ. Bruce Fields nfsd4_sequence_check_conn(conn, session); 1781a663bdd8SJ. Bruce Fields conn = NULL; 1782328ead28SJ. Bruce Fields 1783b85d4c01SBenny Halevy /* Success! bump slot seqid */ 1784b85d4c01SBenny Halevy slot->sl_inuse = true; 1785b85d4c01SBenny Halevy slot->sl_seqid = seq->seqid; 1786557ce264SAndy Adamson slot->sl_cachethis = seq->cachethis; 1787b85d4c01SBenny Halevy 1788b85d4c01SBenny Halevy cstate->slot = slot; 1789b85d4c01SBenny Halevy cstate->session = session; 1790b85d4c01SBenny Halevy 1791b85d4c01SBenny Halevy out: 179226c0c75eSJ. Bruce Fields /* Hold a session reference until done processing the compound. */ 1793aaf84eb9SBenny Halevy if (cstate->session) { 17940d7bb719SJ. Bruce Fields struct nfs4_client *clp = session->se_client; 17950d7bb719SJ. Bruce Fields 179636acb66bSBenny Halevy nfsd4_get_session(cstate->session); 17970d7bb719SJ. Bruce Fields atomic_inc(&clp->cl_refcount); 17980d7bb719SJ. Bruce Fields if (clp->cl_cb_state == NFSD4_CB_DOWN) 17990d7bb719SJ. Bruce Fields seq->status_flags |= SEQ4_STATUS_CB_PATH_DOWN; 1800aaf84eb9SBenny Halevy } 1801a663bdd8SJ. Bruce Fields kfree(conn); 180236acb66bSBenny Halevy spin_unlock(&client_lock); 1803b85d4c01SBenny Halevy dprintk("%s: return %d\n", __func__, ntohl(status)); 1804b85d4c01SBenny Halevy return status; 1805069b6ad4SAndy Adamson } 1806069b6ad4SAndy Adamson 1807069b6ad4SAndy Adamson __be32 18084dc6ec00SJ. Bruce Fields nfsd4_reclaim_complete(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, struct nfsd4_reclaim_complete *rc) 18094dc6ec00SJ. Bruce Fields { 18104dc6ec00SJ. Bruce Fields if (rc->rca_one_fs) { 18114dc6ec00SJ. Bruce Fields if (!cstate->current_fh.fh_dentry) 18124dc6ec00SJ. Bruce Fields return nfserr_nofilehandle; 18134dc6ec00SJ. Bruce Fields /* 18144dc6ec00SJ. Bruce Fields * We don't take advantage of the rca_one_fs case. 18154dc6ec00SJ. Bruce Fields * That's OK, it's optional, we can safely ignore it. 18164dc6ec00SJ. Bruce Fields */ 18174dc6ec00SJ. Bruce Fields return nfs_ok; 18184dc6ec00SJ. Bruce Fields } 18194dc6ec00SJ. Bruce Fields nfs4_lock_state(); 18204dc6ec00SJ. Bruce Fields if (is_client_expired(cstate->session->se_client)) { 18214dc6ec00SJ. Bruce Fields nfs4_unlock_state(); 18224dc6ec00SJ. Bruce Fields /* 18234dc6ec00SJ. Bruce Fields * The following error isn't really legal. 18244dc6ec00SJ. Bruce Fields * But we only get here if the client just explicitly 18254dc6ec00SJ. Bruce Fields * destroyed the client. Surely it no longer cares what 18264dc6ec00SJ. Bruce Fields * error it gets back on an operation for the dead 18274dc6ec00SJ. Bruce Fields * client. 18284dc6ec00SJ. Bruce Fields */ 18294dc6ec00SJ. Bruce Fields return nfserr_stale_clientid; 18304dc6ec00SJ. Bruce Fields } 18314dc6ec00SJ. Bruce Fields nfsd4_create_clid_dir(cstate->session->se_client); 18324dc6ec00SJ. Bruce Fields nfs4_unlock_state(); 18334dc6ec00SJ. Bruce Fields return nfs_ok; 18344dc6ec00SJ. Bruce Fields } 18354dc6ec00SJ. Bruce Fields 18364dc6ec00SJ. Bruce Fields __be32 1837b591480bSJ.Bruce Fields nfsd4_setclientid(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, 1838b591480bSJ.Bruce Fields struct nfsd4_setclientid *setclid) 18391da177e4SLinus Torvalds { 18401da177e4SLinus Torvalds struct xdr_netobj clname = { 18411da177e4SLinus Torvalds .len = setclid->se_namelen, 18421da177e4SLinus Torvalds .data = setclid->se_name, 18431da177e4SLinus Torvalds }; 18441da177e4SLinus Torvalds nfs4_verifier clverifier = setclid->se_verf; 18451da177e4SLinus Torvalds unsigned int strhashval; 184628ce6054SNeilBrown struct nfs4_client *conf, *unconf, *new; 1847b37ad28bSAl Viro __be32 status; 1848a55370a3SNeilBrown char dname[HEXDIR_LEN]; 18491da177e4SLinus Torvalds 18501da177e4SLinus Torvalds if (!check_name(clname)) 185173aea4ecSNeil Brown return nfserr_inval; 18521da177e4SLinus Torvalds 1853a55370a3SNeilBrown status = nfs4_make_rec_clidname(dname, &clname); 1854a55370a3SNeilBrown if (status) 185573aea4ecSNeil Brown return status; 1856a55370a3SNeilBrown 18571da177e4SLinus Torvalds /* 18581da177e4SLinus Torvalds * XXX The Duplicate Request Cache (DRC) has been checked (??) 18591da177e4SLinus Torvalds * We get here on a DRC miss. 18601da177e4SLinus Torvalds */ 18611da177e4SLinus Torvalds 1862a55370a3SNeilBrown strhashval = clientstr_hashval(dname); 18631da177e4SLinus Torvalds 18641da177e4SLinus Torvalds nfs4_lock_state(); 1865e203d506SJ. Bruce Fields conf = find_confirmed_client_by_str(dname, strhashval); 186628ce6054SNeilBrown if (conf) { 1867a186e767SJ. Bruce Fields /* RFC 3530 14.2.33 CASE 0: */ 18681da177e4SLinus Torvalds status = nfserr_clid_inuse; 1869e203d506SJ. Bruce Fields if (clp_used_exchangeid(conf)) 1870e203d506SJ. Bruce Fields goto out; 1871026722c2SJ. Bruce Fields if (!same_creds(&conf->cl_cred, &rqstp->rq_cred)) { 1872363168b4SJeff Layton char addr_str[INET6_ADDRSTRLEN]; 1873363168b4SJeff Layton rpc_ntop((struct sockaddr *) &conf->cl_addr, addr_str, 1874363168b4SJeff Layton sizeof(addr_str)); 1875026722c2SJ. Bruce Fields dprintk("NFSD: setclientid: string in use by client " 1876363168b4SJeff Layton "at %s\n", addr_str); 18771da177e4SLinus Torvalds goto out; 18781da177e4SLinus Torvalds } 18791da177e4SLinus Torvalds } 1880a186e767SJ. Bruce Fields /* 1881a186e767SJ. Bruce Fields * section 14.2.33 of RFC 3530 (under the heading "IMPLEMENTATION") 1882a186e767SJ. Bruce Fields * has a description of SETCLIENTID request processing consisting 1883a186e767SJ. Bruce Fields * of 5 bullet points, labeled as CASE0 - CASE4 below. 1884a186e767SJ. Bruce Fields */ 1885e203d506SJ. Bruce Fields unconf = find_unconfirmed_client_by_str(dname, strhashval); 18861da177e4SLinus Torvalds status = nfserr_resource; 18871da177e4SLinus Torvalds if (!conf) { 18881da177e4SLinus Torvalds /* 1889a186e767SJ. Bruce Fields * RFC 3530 14.2.33 CASE 4: 1890a186e767SJ. Bruce Fields * placed first, because it is the normal case 18911da177e4SLinus Torvalds */ 18921da177e4SLinus Torvalds if (unconf) 18931da177e4SLinus Torvalds expire_client(unconf); 1894b09333c4SRicardo Labiaga new = create_client(clname, dname, rqstp, &clverifier); 1895a55370a3SNeilBrown if (new == NULL) 18961da177e4SLinus Torvalds goto out; 18971da177e4SLinus Torvalds gen_clid(new); 1898599e0a22SJ. Bruce Fields } else if (same_verf(&conf->cl_verifier, &clverifier)) { 18991da177e4SLinus Torvalds /* 1900a186e767SJ. Bruce Fields * RFC 3530 14.2.33 CASE 1: 1901a186e767SJ. Bruce Fields * probable callback update 19021da177e4SLinus Torvalds */ 190331f4a6c1SNeilBrown if (unconf) { 190431f4a6c1SNeilBrown /* Note this is removing unconfirmed {*x***}, 190531f4a6c1SNeilBrown * which is stronger than RFC recommended {vxc**}. 190631f4a6c1SNeilBrown * This has the advantage that there is at most 190731f4a6c1SNeilBrown * one {*x***} in either list at any time. 190831f4a6c1SNeilBrown */ 19091da177e4SLinus Torvalds expire_client(unconf); 19101da177e4SLinus Torvalds } 1911b09333c4SRicardo Labiaga new = create_client(clname, dname, rqstp, &clverifier); 1912a55370a3SNeilBrown if (new == NULL) 19131da177e4SLinus Torvalds goto out; 19141da177e4SLinus Torvalds copy_clid(new, conf); 19151da177e4SLinus Torvalds } else if (!unconf) { 19161da177e4SLinus Torvalds /* 1917a186e767SJ. Bruce Fields * RFC 3530 14.2.33 CASE 2: 1918a186e767SJ. Bruce Fields * probable client reboot; state will be removed if 1919a186e767SJ. Bruce Fields * confirmed. 19201da177e4SLinus Torvalds */ 1921b09333c4SRicardo Labiaga new = create_client(clname, dname, rqstp, &clverifier); 1922a55370a3SNeilBrown if (new == NULL) 19231da177e4SLinus Torvalds goto out; 19241da177e4SLinus Torvalds gen_clid(new); 192549ba8781SJ. Bruce Fields } else { 19261da177e4SLinus Torvalds /* 1927a186e767SJ. Bruce Fields * RFC 3530 14.2.33 CASE 3: 1928a186e767SJ. Bruce Fields * probable client reboot; state will be removed if 1929a186e767SJ. Bruce Fields * confirmed. 19301da177e4SLinus Torvalds */ 19311da177e4SLinus Torvalds expire_client(unconf); 1932b09333c4SRicardo Labiaga new = create_client(clname, dname, rqstp, &clverifier); 1933a55370a3SNeilBrown if (new == NULL) 19341da177e4SLinus Torvalds goto out; 19351da177e4SLinus Torvalds gen_clid(new); 19361da177e4SLinus Torvalds } 19378323c3b2SJ. Bruce Fields /* 19388323c3b2SJ. Bruce Fields * XXX: we should probably set this at creation time, and check 19398323c3b2SJ. Bruce Fields * for consistent minorversion use throughout: 19408323c3b2SJ. Bruce Fields */ 19418323c3b2SJ. Bruce Fields new->cl_minorversion = 0; 19426f3d772fSTakuma Umeya gen_callback(new, setclid, rqstp); 1943c175b83cSJ. Bruce Fields add_to_unconfirmed(new, strhashval); 19441da177e4SLinus Torvalds setclid->se_clientid.cl_boot = new->cl_clientid.cl_boot; 19451da177e4SLinus Torvalds setclid->se_clientid.cl_id = new->cl_clientid.cl_id; 19461da177e4SLinus Torvalds memcpy(setclid->se_confirm.data, new->cl_confirm.data, sizeof(setclid->se_confirm.data)); 19471da177e4SLinus Torvalds status = nfs_ok; 19481da177e4SLinus Torvalds out: 19491da177e4SLinus Torvalds nfs4_unlock_state(); 19501da177e4SLinus Torvalds return status; 19511da177e4SLinus Torvalds } 19521da177e4SLinus Torvalds 19531da177e4SLinus Torvalds 19541da177e4SLinus Torvalds /* 1955a186e767SJ. Bruce Fields * Section 14.2.34 of RFC 3530 (under the heading "IMPLEMENTATION") has 1956a186e767SJ. Bruce Fields * a description of SETCLIENTID_CONFIRM request processing consisting of 4 1957a186e767SJ. Bruce Fields * bullets, labeled as CASE1 - CASE4 below. 19581da177e4SLinus Torvalds */ 1959b37ad28bSAl Viro __be32 1960b591480bSJ.Bruce Fields nfsd4_setclientid_confirm(struct svc_rqst *rqstp, 1961b591480bSJ.Bruce Fields struct nfsd4_compound_state *cstate, 1962b591480bSJ.Bruce Fields struct nfsd4_setclientid_confirm *setclientid_confirm) 19631da177e4SLinus Torvalds { 1964363168b4SJeff Layton struct sockaddr *sa = svc_addr(rqstp); 196521ab45a4SNeilBrown struct nfs4_client *conf, *unconf; 19661da177e4SLinus Torvalds nfs4_verifier confirm = setclientid_confirm->sc_confirm; 19671da177e4SLinus Torvalds clientid_t * clid = &setclientid_confirm->sc_clientid; 1968b37ad28bSAl Viro __be32 status; 19691da177e4SLinus Torvalds 19701da177e4SLinus Torvalds if (STALE_CLIENTID(clid)) 19711da177e4SLinus Torvalds return nfserr_stale_clientid; 19721da177e4SLinus Torvalds /* 19731da177e4SLinus Torvalds * XXX The Duplicate Request Cache (DRC) has been checked (??) 19741da177e4SLinus Torvalds * We get here on a DRC miss. 19751da177e4SLinus Torvalds */ 19761da177e4SLinus Torvalds 19771da177e4SLinus Torvalds nfs4_lock_state(); 197821ab45a4SNeilBrown 197921ab45a4SNeilBrown conf = find_confirmed_client(clid); 198021ab45a4SNeilBrown unconf = find_unconfirmed_client(clid); 198121ab45a4SNeilBrown 198222de4d83SNeilBrown status = nfserr_clid_inuse; 1983363168b4SJeff Layton if (conf && !rpc_cmp_addr((struct sockaddr *) &conf->cl_addr, sa)) 19841da177e4SLinus Torvalds goto out; 1985363168b4SJeff Layton if (unconf && !rpc_cmp_addr((struct sockaddr *) &unconf->cl_addr, sa)) 19861da177e4SLinus Torvalds goto out; 198721ab45a4SNeilBrown 1988a186e767SJ. Bruce Fields /* 1989a186e767SJ. Bruce Fields * section 14.2.34 of RFC 3530 has a description of 1990a186e767SJ. Bruce Fields * SETCLIENTID_CONFIRM request processing consisting 1991a186e767SJ. Bruce Fields * of 4 bullet points, labeled as CASE1 - CASE4 below. 1992a186e767SJ. Bruce Fields */ 1993366e0c1dSJ. Bruce Fields if (conf && unconf && same_verf(&confirm, &unconf->cl_confirm)) { 1994a186e767SJ. Bruce Fields /* 1995a186e767SJ. Bruce Fields * RFC 3530 14.2.34 CASE 1: 1996a186e767SJ. Bruce Fields * callback update 19977c79f737SNeilBrown */ 1998599e0a22SJ. Bruce Fields if (!same_creds(&conf->cl_cred, &unconf->cl_cred)) 19991da177e4SLinus Torvalds status = nfserr_clid_inuse; 20001da177e4SLinus Torvalds else { 20015a3c9d71SJ. Bruce Fields nfsd4_change_callback(conf, &unconf->cl_cb_conn); 20025a3c9d71SJ. Bruce Fields nfsd4_probe_callback(conf); 20031a69c179SNeilBrown expire_client(unconf); 20041da177e4SLinus Torvalds status = nfs_ok; 20051a69c179SNeilBrown 20061da177e4SLinus Torvalds } 2007f3aba4e5SJ. Bruce Fields } else if (conf && !unconf) { 2008a186e767SJ. Bruce Fields /* 2009a186e767SJ. Bruce Fields * RFC 3530 14.2.34 CASE 2: 2010a186e767SJ. Bruce Fields * probable retransmitted request; play it safe and 2011a186e767SJ. Bruce Fields * do nothing. 20127c79f737SNeilBrown */ 2013599e0a22SJ. Bruce Fields if (!same_creds(&conf->cl_cred, &rqstp->rq_cred)) 20141da177e4SLinus Torvalds status = nfserr_clid_inuse; 201521ab45a4SNeilBrown else 20161da177e4SLinus Torvalds status = nfs_ok; 20177c79f737SNeilBrown } else if (!conf && unconf 2018599e0a22SJ. Bruce Fields && same_verf(&unconf->cl_confirm, &confirm)) { 2019a186e767SJ. Bruce Fields /* 2020a186e767SJ. Bruce Fields * RFC 3530 14.2.34 CASE 3: 2021a186e767SJ. Bruce Fields * Normal case; new or rebooted client: 20221da177e4SLinus Torvalds */ 2023599e0a22SJ. Bruce Fields if (!same_creds(&unconf->cl_cred, &rqstp->rq_cred)) { 20241da177e4SLinus Torvalds status = nfserr_clid_inuse; 20251da177e4SLinus Torvalds } else { 20261a69c179SNeilBrown unsigned int hash = 20271a69c179SNeilBrown clientstr_hashval(unconf->cl_recdir); 20281a69c179SNeilBrown conf = find_confirmed_client_by_str(unconf->cl_recdir, 2029e203d506SJ. Bruce Fields hash); 20301a69c179SNeilBrown if (conf) { 2031c7b9a459SNeilBrown nfsd4_remove_clid_dir(conf); 20321a69c179SNeilBrown expire_client(conf); 20331a69c179SNeilBrown } 20341da177e4SLinus Torvalds move_to_confirmed(unconf); 203521ab45a4SNeilBrown conf = unconf; 20365a3c9d71SJ. Bruce Fields nfsd4_probe_callback(conf); 20371a69c179SNeilBrown status = nfs_ok; 20381da177e4SLinus Torvalds } 2039599e0a22SJ. Bruce Fields } else if ((!conf || (conf && !same_verf(&conf->cl_confirm, &confirm))) 2040599e0a22SJ. Bruce Fields && (!unconf || (unconf && !same_verf(&unconf->cl_confirm, 20417c79f737SNeilBrown &confirm)))) { 2042a186e767SJ. Bruce Fields /* 2043a186e767SJ. Bruce Fields * RFC 3530 14.2.34 CASE 4: 2044a186e767SJ. Bruce Fields * Client probably hasn't noticed that we rebooted yet. 20451da177e4SLinus Torvalds */ 20461da177e4SLinus Torvalds status = nfserr_stale_clientid; 20477c79f737SNeilBrown } else { 20481da177e4SLinus Torvalds /* check that we have hit one of the cases...*/ 204922de4d83SNeilBrown status = nfserr_clid_inuse; 205008e8987cSNeilBrown } 20511da177e4SLinus Torvalds out: 20521da177e4SLinus Torvalds nfs4_unlock_state(); 20531da177e4SLinus Torvalds return status; 20541da177e4SLinus Torvalds } 20551da177e4SLinus Torvalds 20561da177e4SLinus Torvalds /* OPEN Share state helper functions */ 20571da177e4SLinus Torvalds static inline struct nfs4_file * 20581da177e4SLinus Torvalds alloc_init_file(struct inode *ino) 20591da177e4SLinus Torvalds { 20601da177e4SLinus Torvalds struct nfs4_file *fp; 20611da177e4SLinus Torvalds unsigned int hashval = file_hashval(ino); 20621da177e4SLinus Torvalds 2063e60d4398SNeilBrown fp = kmem_cache_alloc(file_slab, GFP_KERNEL); 2064e60d4398SNeilBrown if (fp) { 20658b671b80SJ. Bruce Fields atomic_set(&fp->fi_ref, 1); 20661da177e4SLinus Torvalds INIT_LIST_HEAD(&fp->fi_hash); 20678beefa24SNeilBrown INIT_LIST_HEAD(&fp->fi_stateids); 20688beefa24SNeilBrown INIT_LIST_HEAD(&fp->fi_delegations); 20691da177e4SLinus Torvalds fp->fi_inode = igrab(ino); 20701da177e4SLinus Torvalds fp->fi_id = current_fileid++; 207147f9940cSMeelap Shah fp->fi_had_conflict = false; 2072acfdf5c3SJ. Bruce Fields fp->fi_lease = NULL; 2073f9d7562fSJ. Bruce Fields memset(fp->fi_fds, 0, sizeof(fp->fi_fds)); 2074f9d7562fSJ. Bruce Fields memset(fp->fi_access, 0, sizeof(fp->fi_access)); 207547cee541SPavel Emelyanov spin_lock(&recall_lock); 207647cee541SPavel Emelyanov list_add(&fp->fi_hash, &file_hashtbl[hashval]); 207747cee541SPavel Emelyanov spin_unlock(&recall_lock); 20781da177e4SLinus Torvalds return fp; 20791da177e4SLinus Torvalds } 20801da177e4SLinus Torvalds return NULL; 20811da177e4SLinus Torvalds } 20821da177e4SLinus Torvalds 20831da177e4SLinus Torvalds static void 2084e18b890bSChristoph Lameter nfsd4_free_slab(struct kmem_cache **slab) 2085e60d4398SNeilBrown { 2086e60d4398SNeilBrown if (*slab == NULL) 2087e60d4398SNeilBrown return; 20881a1d92c1SAlexey Dobriyan kmem_cache_destroy(*slab); 2089e60d4398SNeilBrown *slab = NULL; 2090e60d4398SNeilBrown } 2091e60d4398SNeilBrown 2092e8ff2a84SJ. Bruce Fields void 2093e60d4398SNeilBrown nfsd4_free_slabs(void) 2094e60d4398SNeilBrown { 2095e60d4398SNeilBrown nfsd4_free_slab(&stateowner_slab); 2096e60d4398SNeilBrown nfsd4_free_slab(&file_slab); 20975ac049acSNeilBrown nfsd4_free_slab(&stateid_slab); 20985b2d21c1SNeilBrown nfsd4_free_slab(&deleg_slab); 2099e60d4398SNeilBrown } 21001da177e4SLinus Torvalds 21011da177e4SLinus Torvalds static int 21021da177e4SLinus Torvalds nfsd4_init_slabs(void) 21031da177e4SLinus Torvalds { 21041da177e4SLinus Torvalds stateowner_slab = kmem_cache_create("nfsd4_stateowners", 210520c2df83SPaul Mundt sizeof(struct nfs4_stateowner), 0, 0, NULL); 2106e60d4398SNeilBrown if (stateowner_slab == NULL) 2107e60d4398SNeilBrown goto out_nomem; 2108e60d4398SNeilBrown file_slab = kmem_cache_create("nfsd4_files", 210920c2df83SPaul Mundt sizeof(struct nfs4_file), 0, 0, NULL); 2110e60d4398SNeilBrown if (file_slab == NULL) 2111e60d4398SNeilBrown goto out_nomem; 21125ac049acSNeilBrown stateid_slab = kmem_cache_create("nfsd4_stateids", 211320c2df83SPaul Mundt sizeof(struct nfs4_stateid), 0, 0, NULL); 21145ac049acSNeilBrown if (stateid_slab == NULL) 21155ac049acSNeilBrown goto out_nomem; 21165b2d21c1SNeilBrown deleg_slab = kmem_cache_create("nfsd4_delegations", 211720c2df83SPaul Mundt sizeof(struct nfs4_delegation), 0, 0, NULL); 21185b2d21c1SNeilBrown if (deleg_slab == NULL) 21195b2d21c1SNeilBrown goto out_nomem; 2120e60d4398SNeilBrown return 0; 2121e60d4398SNeilBrown out_nomem: 2122e60d4398SNeilBrown nfsd4_free_slabs(); 21231da177e4SLinus Torvalds dprintk("nfsd4: out of memory while initializing nfsv4\n"); 21241da177e4SLinus Torvalds return -ENOMEM; 21251da177e4SLinus Torvalds } 21261da177e4SLinus Torvalds 21271da177e4SLinus Torvalds void 21281da177e4SLinus Torvalds nfs4_free_stateowner(struct kref *kref) 21291da177e4SLinus Torvalds { 21301da177e4SLinus Torvalds struct nfs4_stateowner *sop = 21311da177e4SLinus Torvalds container_of(kref, struct nfs4_stateowner, so_ref); 21321da177e4SLinus Torvalds kfree(sop->so_owner.data); 21331da177e4SLinus Torvalds kmem_cache_free(stateowner_slab, sop); 21341da177e4SLinus Torvalds } 21351da177e4SLinus Torvalds 21361da177e4SLinus Torvalds static inline struct nfs4_stateowner * 21371da177e4SLinus Torvalds alloc_stateowner(struct xdr_netobj *owner) 21381da177e4SLinus Torvalds { 21391da177e4SLinus Torvalds struct nfs4_stateowner *sop; 21401da177e4SLinus Torvalds 21411da177e4SLinus Torvalds if ((sop = kmem_cache_alloc(stateowner_slab, GFP_KERNEL))) { 21421da177e4SLinus Torvalds if ((sop->so_owner.data = kmalloc(owner->len, GFP_KERNEL))) { 21431da177e4SLinus Torvalds memcpy(sop->so_owner.data, owner->data, owner->len); 21441da177e4SLinus Torvalds sop->so_owner.len = owner->len; 21451da177e4SLinus Torvalds kref_init(&sop->so_ref); 21461da177e4SLinus Torvalds return sop; 21471da177e4SLinus Torvalds } 21481da177e4SLinus Torvalds kmem_cache_free(stateowner_slab, sop); 21491da177e4SLinus Torvalds } 21501da177e4SLinus Torvalds return NULL; 21511da177e4SLinus Torvalds } 21521da177e4SLinus Torvalds 21531da177e4SLinus Torvalds static struct nfs4_stateowner * 21541da177e4SLinus Torvalds alloc_init_open_stateowner(unsigned int strhashval, struct nfs4_client *clp, struct nfsd4_open *open) { 21551da177e4SLinus Torvalds struct nfs4_stateowner *sop; 21561da177e4SLinus Torvalds struct nfs4_replay *rp; 21571da177e4SLinus Torvalds unsigned int idhashval; 21581da177e4SLinus Torvalds 21591da177e4SLinus Torvalds if (!(sop = alloc_stateowner(&open->op_owner))) 21601da177e4SLinus Torvalds return NULL; 21611da177e4SLinus Torvalds idhashval = ownerid_hashval(current_ownerid); 21621da177e4SLinus Torvalds INIT_LIST_HEAD(&sop->so_idhash); 21631da177e4SLinus Torvalds INIT_LIST_HEAD(&sop->so_strhash); 21641da177e4SLinus Torvalds INIT_LIST_HEAD(&sop->so_perclient); 2165ea1da636SNeilBrown INIT_LIST_HEAD(&sop->so_stateids); 2166ea1da636SNeilBrown INIT_LIST_HEAD(&sop->so_perstateid); /* not used */ 21671da177e4SLinus Torvalds INIT_LIST_HEAD(&sop->so_close_lru); 21681da177e4SLinus Torvalds sop->so_time = 0; 21691da177e4SLinus Torvalds list_add(&sop->so_idhash, &ownerid_hashtbl[idhashval]); 21701da177e4SLinus Torvalds list_add(&sop->so_strhash, &ownerstr_hashtbl[strhashval]); 2171ea1da636SNeilBrown list_add(&sop->so_perclient, &clp->cl_openowners); 21721da177e4SLinus Torvalds sop->so_is_open_owner = 1; 21731da177e4SLinus Torvalds sop->so_id = current_ownerid++; 21741da177e4SLinus Torvalds sop->so_client = clp; 21751da177e4SLinus Torvalds sop->so_seqid = open->op_seqid; 21761da177e4SLinus Torvalds sop->so_confirmed = 0; 21771da177e4SLinus Torvalds rp = &sop->so_replay; 2178de1ae286SAl Viro rp->rp_status = nfserr_serverfault; 21791da177e4SLinus Torvalds rp->rp_buflen = 0; 21801da177e4SLinus Torvalds rp->rp_buf = rp->rp_ibuf; 21811da177e4SLinus Torvalds return sop; 21821da177e4SLinus Torvalds } 21831da177e4SLinus Torvalds 21841da177e4SLinus Torvalds static inline void 21851da177e4SLinus Torvalds init_stateid(struct nfs4_stateid *stp, struct nfs4_file *fp, struct nfsd4_open *open) { 21861da177e4SLinus Torvalds struct nfs4_stateowner *sop = open->op_stateowner; 21871da177e4SLinus Torvalds unsigned int hashval = stateid_hashval(sop->so_id, fp->fi_id); 21881da177e4SLinus Torvalds 21891da177e4SLinus Torvalds INIT_LIST_HEAD(&stp->st_hash); 2190ea1da636SNeilBrown INIT_LIST_HEAD(&stp->st_perstateowner); 2191ea1da636SNeilBrown INIT_LIST_HEAD(&stp->st_lockowners); 21921da177e4SLinus Torvalds INIT_LIST_HEAD(&stp->st_perfile); 21931da177e4SLinus Torvalds list_add(&stp->st_hash, &stateid_hashtbl[hashval]); 2194ea1da636SNeilBrown list_add(&stp->st_perstateowner, &sop->so_stateids); 21958beefa24SNeilBrown list_add(&stp->st_perfile, &fp->fi_stateids); 21961da177e4SLinus Torvalds stp->st_stateowner = sop; 219713cd2184SNeilBrown get_nfs4_file(fp); 21981da177e4SLinus Torvalds stp->st_file = fp; 2199e4e83ea4SJ. Bruce Fields stp->st_stateid.si_boot = boot_time; 22001da177e4SLinus Torvalds stp->st_stateid.si_stateownerid = sop->so_id; 22011da177e4SLinus Torvalds stp->st_stateid.si_fileid = fp->fi_id; 22021da177e4SLinus Torvalds stp->st_stateid.si_generation = 0; 22031da177e4SLinus Torvalds stp->st_access_bmap = 0; 22041da177e4SLinus Torvalds stp->st_deny_bmap = 0; 220584459a11SAndy Adamson __set_bit(open->op_share_access & ~NFS4_SHARE_WANT_MASK, 220684459a11SAndy Adamson &stp->st_access_bmap); 22071da177e4SLinus Torvalds __set_bit(open->op_share_deny, &stp->st_deny_bmap); 22084c4cd222SNeilBrown stp->st_openstp = NULL; 22091da177e4SLinus Torvalds } 22101da177e4SLinus Torvalds 22111da177e4SLinus Torvalds static void 22121da177e4SLinus Torvalds move_to_close_lru(struct nfs4_stateowner *sop) 22131da177e4SLinus Torvalds { 22141da177e4SLinus Torvalds dprintk("NFSD: move_to_close_lru nfs4_stateowner %p\n", sop); 22151da177e4SLinus Torvalds 2216358dd55aSNeilBrown list_move_tail(&sop->so_close_lru, &close_lru); 22171da177e4SLinus Torvalds sop->so_time = get_seconds(); 22181da177e4SLinus Torvalds } 22191da177e4SLinus Torvalds 22201da177e4SLinus Torvalds static int 2221599e0a22SJ. Bruce Fields same_owner_str(struct nfs4_stateowner *sop, struct xdr_netobj *owner, 2222599e0a22SJ. Bruce Fields clientid_t *clid) 2223599e0a22SJ. Bruce Fields { 2224599e0a22SJ. Bruce Fields return (sop->so_owner.len == owner->len) && 2225599e0a22SJ. Bruce Fields 0 == memcmp(sop->so_owner.data, owner->data, owner->len) && 2226599e0a22SJ. Bruce Fields (sop->so_client->cl_clientid.cl_id == clid->cl_id); 22271da177e4SLinus Torvalds } 22281da177e4SLinus Torvalds 22291da177e4SLinus Torvalds static struct nfs4_stateowner * 22301da177e4SLinus Torvalds find_openstateowner_str(unsigned int hashval, struct nfsd4_open *open) 22311da177e4SLinus Torvalds { 22321da177e4SLinus Torvalds struct nfs4_stateowner *so = NULL; 22331da177e4SLinus Torvalds 22341da177e4SLinus Torvalds list_for_each_entry(so, &ownerstr_hashtbl[hashval], so_strhash) { 2235599e0a22SJ. Bruce Fields if (same_owner_str(so, &open->op_owner, &open->op_clientid)) 22361da177e4SLinus Torvalds return so; 22371da177e4SLinus Torvalds } 22381da177e4SLinus Torvalds return NULL; 22391da177e4SLinus Torvalds } 22401da177e4SLinus Torvalds 22411da177e4SLinus Torvalds /* search file_hashtbl[] for file */ 22421da177e4SLinus Torvalds static struct nfs4_file * 22431da177e4SLinus Torvalds find_file(struct inode *ino) 22441da177e4SLinus Torvalds { 22451da177e4SLinus Torvalds unsigned int hashval = file_hashval(ino); 22461da177e4SLinus Torvalds struct nfs4_file *fp; 22471da177e4SLinus Torvalds 22488b671b80SJ. Bruce Fields spin_lock(&recall_lock); 22491da177e4SLinus Torvalds list_for_each_entry(fp, &file_hashtbl[hashval], fi_hash) { 225013cd2184SNeilBrown if (fp->fi_inode == ino) { 225113cd2184SNeilBrown get_nfs4_file(fp); 22528b671b80SJ. Bruce Fields spin_unlock(&recall_lock); 22531da177e4SLinus Torvalds return fp; 22541da177e4SLinus Torvalds } 225513cd2184SNeilBrown } 22568b671b80SJ. Bruce Fields spin_unlock(&recall_lock); 22571da177e4SLinus Torvalds return NULL; 22581da177e4SLinus Torvalds } 22591da177e4SLinus Torvalds 2260d87a8adeSAndy Adamson static inline int access_valid(u32 x, u32 minorversion) 2261ba5a6a19SJ. Bruce Fields { 2262d87a8adeSAndy Adamson if ((x & NFS4_SHARE_ACCESS_MASK) < NFS4_SHARE_ACCESS_READ) 22638838dc43SJ. Bruce Fields return 0; 2264d87a8adeSAndy Adamson if ((x & NFS4_SHARE_ACCESS_MASK) > NFS4_SHARE_ACCESS_BOTH) 2265d87a8adeSAndy Adamson return 0; 2266d87a8adeSAndy Adamson x &= ~NFS4_SHARE_ACCESS_MASK; 2267d87a8adeSAndy Adamson if (minorversion && x) { 2268d87a8adeSAndy Adamson if ((x & NFS4_SHARE_WANT_MASK) > NFS4_SHARE_WANT_CANCEL) 2269d87a8adeSAndy Adamson return 0; 2270d87a8adeSAndy Adamson if ((x & NFS4_SHARE_WHEN_MASK) > NFS4_SHARE_PUSH_DELEG_WHEN_UNCONTENDED) 2271d87a8adeSAndy Adamson return 0; 2272d87a8adeSAndy Adamson x &= ~(NFS4_SHARE_WANT_MASK | NFS4_SHARE_WHEN_MASK); 2273d87a8adeSAndy Adamson } 2274d87a8adeSAndy Adamson if (x) 22758838dc43SJ. Bruce Fields return 0; 22768838dc43SJ. Bruce Fields return 1; 2277ba5a6a19SJ. Bruce Fields } 2278ba5a6a19SJ. Bruce Fields 22798838dc43SJ. Bruce Fields static inline int deny_valid(u32 x) 2280ba5a6a19SJ. Bruce Fields { 22818838dc43SJ. Bruce Fields /* Note: unlike access bits, deny bits may be zero. */ 22828838dc43SJ. Bruce Fields return x <= NFS4_SHARE_DENY_BOTH; 2283ba5a6a19SJ. Bruce Fields } 22841da177e4SLinus Torvalds 22854f83aa30SJ. Bruce Fields /* 22861da177e4SLinus Torvalds * Called to check deny when READ with all zero stateid or 22871da177e4SLinus Torvalds * WRITE with all zero or all one stateid 22881da177e4SLinus Torvalds */ 2289b37ad28bSAl Viro static __be32 22901da177e4SLinus Torvalds nfs4_share_conflict(struct svc_fh *current_fh, unsigned int deny_type) 22911da177e4SLinus Torvalds { 22921da177e4SLinus Torvalds struct inode *ino = current_fh->fh_dentry->d_inode; 22931da177e4SLinus Torvalds struct nfs4_file *fp; 22941da177e4SLinus Torvalds struct nfs4_stateid *stp; 2295b37ad28bSAl Viro __be32 ret; 22961da177e4SLinus Torvalds 22971da177e4SLinus Torvalds dprintk("NFSD: nfs4_share_conflict\n"); 22981da177e4SLinus Torvalds 22991da177e4SLinus Torvalds fp = find_file(ino); 230013cd2184SNeilBrown if (!fp) 230113cd2184SNeilBrown return nfs_ok; 2302b700949bSNeilBrown ret = nfserr_locked; 23031da177e4SLinus Torvalds /* Search for conflicting share reservations */ 23048beefa24SNeilBrown list_for_each_entry(stp, &fp->fi_stateids, st_perfile) { 23051da177e4SLinus Torvalds if (test_bit(deny_type, &stp->st_deny_bmap) || 23061da177e4SLinus Torvalds test_bit(NFS4_SHARE_DENY_BOTH, &stp->st_deny_bmap)) 230713cd2184SNeilBrown goto out; 23081da177e4SLinus Torvalds } 230913cd2184SNeilBrown ret = nfs_ok; 231013cd2184SNeilBrown out: 231113cd2184SNeilBrown put_nfs4_file(fp); 231213cd2184SNeilBrown return ret; 23131da177e4SLinus Torvalds } 23141da177e4SLinus Torvalds 23151da177e4SLinus Torvalds static inline void 2316f9d7562fSJ. Bruce Fields nfs4_file_downgrade(struct nfs4_file *fp, unsigned int share_access) 23171da177e4SLinus Torvalds { 2318f9d7562fSJ. Bruce Fields if (share_access & NFS4_SHARE_ACCESS_WRITE) 2319f9d7562fSJ. Bruce Fields nfs4_file_put_access(fp, O_WRONLY); 2320f9d7562fSJ. Bruce Fields if (share_access & NFS4_SHARE_ACCESS_READ) 2321f9d7562fSJ. Bruce Fields nfs4_file_put_access(fp, O_RDONLY); 23221da177e4SLinus Torvalds } 23231da177e4SLinus Torvalds 23246b57d9c8SJ. Bruce Fields static void nfsd_break_one_deleg(struct nfs4_delegation *dp) 23251da177e4SLinus Torvalds { 23261da177e4SLinus Torvalds /* We're assuming the state code never drops its reference 23271da177e4SLinus Torvalds * without first removing the lease. Since we're in this lease 23281da177e4SLinus Torvalds * callback (and since the lease code is serialized by the kernel 23291da177e4SLinus Torvalds * lock) we know the server hasn't removed the lease yet, we know 23301da177e4SLinus Torvalds * it's safe to take a reference: */ 23311da177e4SLinus Torvalds atomic_inc(&dp->dl_count); 23321da177e4SLinus Torvalds 23331da177e4SLinus Torvalds list_add_tail(&dp->dl_recall_lru, &del_recall_lru); 23341da177e4SLinus Torvalds 2335460781b5SArnd Bergmann /* only place dl_time is set. protected by lock_flocks*/ 23361da177e4SLinus Torvalds dp->dl_time = get_seconds(); 23371da177e4SLinus Torvalds 23386b57d9c8SJ. Bruce Fields nfsd4_cb_recall(dp); 23396b57d9c8SJ. Bruce Fields } 23406b57d9c8SJ. Bruce Fields 2341acfdf5c3SJ. Bruce Fields /* Called from break_lease() with lock_flocks() held. */ 23426b57d9c8SJ. Bruce Fields static void nfsd_break_deleg_cb(struct file_lock *fl) 23436b57d9c8SJ. Bruce Fields { 2344acfdf5c3SJ. Bruce Fields struct nfs4_file *fp = (struct nfs4_file *)fl->fl_owner; 2345acfdf5c3SJ. Bruce Fields struct nfs4_delegation *dp; 23466b57d9c8SJ. Bruce Fields 2347acfdf5c3SJ. Bruce Fields BUG_ON(!fp); 2348acfdf5c3SJ. Bruce Fields /* We assume break_lease is only called once per lease: */ 2349acfdf5c3SJ. Bruce Fields BUG_ON(fp->fi_had_conflict); 23500272e1fdSJ. Bruce Fields /* 23510272e1fdSJ. Bruce Fields * We don't want the locks code to timeout the lease for us; 2352acfdf5c3SJ. Bruce Fields * we'll remove it ourself if a delegation isn't returned 23536b57d9c8SJ. Bruce Fields * in time: 23540272e1fdSJ. Bruce Fields */ 23550272e1fdSJ. Bruce Fields fl->fl_break_time = 0; 23561da177e4SLinus Torvalds 23575d926e8cSJ. Bruce Fields spin_lock(&recall_lock); 2358acfdf5c3SJ. Bruce Fields fp->fi_had_conflict = true; 2359acfdf5c3SJ. Bruce Fields list_for_each_entry(dp, &fp->fi_delegations, dl_perfile) 23605d926e8cSJ. Bruce Fields nfsd_break_one_deleg(dp); 23615d926e8cSJ. Bruce Fields spin_unlock(&recall_lock); 23621da177e4SLinus Torvalds } 23631da177e4SLinus Torvalds 23641da177e4SLinus Torvalds static 23651da177e4SLinus Torvalds int nfsd_change_deleg_cb(struct file_lock **onlist, int arg) 23661da177e4SLinus Torvalds { 23671da177e4SLinus Torvalds if (arg & F_UNLCK) 23681da177e4SLinus Torvalds return lease_modify(onlist, arg); 23691da177e4SLinus Torvalds else 23701da177e4SLinus Torvalds return -EAGAIN; 23711da177e4SLinus Torvalds } 23721da177e4SLinus Torvalds 23737b021967SAlexey Dobriyan static const struct lock_manager_operations nfsd_lease_mng_ops = { 23741da177e4SLinus Torvalds .fl_break = nfsd_break_deleg_cb, 23751da177e4SLinus Torvalds .fl_change = nfsd_change_deleg_cb, 23761da177e4SLinus Torvalds }; 23771da177e4SLinus Torvalds 23781da177e4SLinus Torvalds 2379b37ad28bSAl Viro __be32 23806668958fSAndy Adamson nfsd4_process_open1(struct nfsd4_compound_state *cstate, 23816668958fSAndy Adamson struct nfsd4_open *open) 23821da177e4SLinus Torvalds { 23831da177e4SLinus Torvalds clientid_t *clientid = &open->op_clientid; 23841da177e4SLinus Torvalds struct nfs4_client *clp = NULL; 23851da177e4SLinus Torvalds unsigned int strhashval; 23861da177e4SLinus Torvalds struct nfs4_stateowner *sop = NULL; 23871da177e4SLinus Torvalds 23881da177e4SLinus Torvalds if (!check_name(open->op_owner)) 23890f442aa2SJ. Bruce Fields return nfserr_inval; 23901da177e4SLinus Torvalds 23911da177e4SLinus Torvalds if (STALE_CLIENTID(&open->op_clientid)) 23921da177e4SLinus Torvalds return nfserr_stale_clientid; 23931da177e4SLinus Torvalds 23941da177e4SLinus Torvalds strhashval = ownerstr_hashval(clientid->cl_id, open->op_owner); 23951da177e4SLinus Torvalds sop = find_openstateowner_str(strhashval, open); 23961da177e4SLinus Torvalds open->op_stateowner = sop; 23970f442aa2SJ. Bruce Fields if (!sop) { 23980f442aa2SJ. Bruce Fields /* Make sure the client's lease hasn't expired. */ 23990f442aa2SJ. Bruce Fields clp = find_confirmed_client(clientid); 24000f442aa2SJ. Bruce Fields if (clp == NULL) 24010f442aa2SJ. Bruce Fields return nfserr_expired; 24020f442aa2SJ. Bruce Fields goto renew; 24030f442aa2SJ. Bruce Fields } 24046668958fSAndy Adamson /* When sessions are used, skip open sequenceid processing */ 24056668958fSAndy Adamson if (nfsd4_has_session(cstate)) 24066668958fSAndy Adamson goto renew; 2407ae8b6253SJ. Bruce Fields if (!sop->so_confirmed) { 24080f442aa2SJ. Bruce Fields /* Replace unconfirmed owners without checking for replay. */ 2409ae8b6253SJ. Bruce Fields clp = sop->so_client; 2410f044ff83SJ. Bruce Fields release_openowner(sop); 24110f442aa2SJ. Bruce Fields open->op_stateowner = NULL; 2412ae8b6253SJ. Bruce Fields goto renew; 24130f442aa2SJ. Bruce Fields } 24140f442aa2SJ. Bruce Fields if (open->op_seqid == sop->so_seqid - 1) { 24151da177e4SLinus Torvalds if (sop->so_replay.rp_buflen) 2416a90b061cSAl Viro return nfserr_replay_me; 24171da177e4SLinus Torvalds /* The original OPEN failed so spectacularly 24181da177e4SLinus Torvalds * that we don't even have replay data saved! 24191da177e4SLinus Torvalds * Therefore, we have no choice but to continue 24201da177e4SLinus Torvalds * processing this OPEN; presumably, we'll 24211da177e4SLinus Torvalds * fail again for the same reason. 24221da177e4SLinus Torvalds */ 24230f442aa2SJ. Bruce Fields dprintk("nfsd4_process_open1: replay with no replay cache\n"); 24241da177e4SLinus Torvalds goto renew; 24251da177e4SLinus Torvalds } 24260f442aa2SJ. Bruce Fields if (open->op_seqid != sop->so_seqid) 24270f442aa2SJ. Bruce Fields return nfserr_bad_seqid; 24280f442aa2SJ. Bruce Fields renew: 24290f442aa2SJ. Bruce Fields if (open->op_stateowner == NULL) { 24301da177e4SLinus Torvalds sop = alloc_init_open_stateowner(strhashval, clp, open); 24311da177e4SLinus Torvalds if (sop == NULL) 24320f442aa2SJ. Bruce Fields return nfserr_resource; 24331da177e4SLinus Torvalds open->op_stateowner = sop; 24340f442aa2SJ. Bruce Fields } 24350f442aa2SJ. Bruce Fields list_del_init(&sop->so_close_lru); 24361da177e4SLinus Torvalds renew_client(sop->so_client); 24370f442aa2SJ. Bruce Fields return nfs_ok; 24381da177e4SLinus Torvalds } 24391da177e4SLinus Torvalds 2440b37ad28bSAl Viro static inline __be32 24414a6e43e6SNeilBrown nfs4_check_delegmode(struct nfs4_delegation *dp, int flags) 24424a6e43e6SNeilBrown { 24434a6e43e6SNeilBrown if ((flags & WR_STATE) && (dp->dl_type == NFS4_OPEN_DELEGATE_READ)) 24444a6e43e6SNeilBrown return nfserr_openmode; 24454a6e43e6SNeilBrown else 24464a6e43e6SNeilBrown return nfs_ok; 24474a6e43e6SNeilBrown } 24484a6e43e6SNeilBrown 244952f4fb43SNeilBrown static struct nfs4_delegation * 245052f4fb43SNeilBrown find_delegation_file(struct nfs4_file *fp, stateid_t *stid) 245152f4fb43SNeilBrown { 245232b007b4SJ. Bruce Fields struct nfs4_delegation *dp; 245352f4fb43SNeilBrown 2454acfdf5c3SJ. Bruce Fields spin_lock(&recall_lock); 245532b007b4SJ. Bruce Fields list_for_each_entry(dp, &fp->fi_delegations, dl_perfile) 245632b007b4SJ. Bruce Fields if (dp->dl_stateid.si_stateownerid == stid->si_stateownerid) { 2457acfdf5c3SJ. Bruce Fields spin_unlock(&recall_lock); 2458acfdf5c3SJ. Bruce Fields return dp; 245952f4fb43SNeilBrown } 246032b007b4SJ. Bruce Fields spin_unlock(&recall_lock); 246132b007b4SJ. Bruce Fields return NULL; 246232b007b4SJ. Bruce Fields } 246352f4fb43SNeilBrown 246424a0111eSJ. Bruce Fields int share_access_to_flags(u32 share_access) 246524a0111eSJ. Bruce Fields { 246624a0111eSJ. Bruce Fields share_access &= ~NFS4_SHARE_WANT_MASK; 246724a0111eSJ. Bruce Fields 246824a0111eSJ. Bruce Fields return share_access == NFS4_SHARE_ACCESS_READ ? RD_STATE : WR_STATE; 246924a0111eSJ. Bruce Fields } 247024a0111eSJ. Bruce Fields 2471b37ad28bSAl Viro static __be32 2472567d9829SNeilBrown nfs4_check_deleg(struct nfs4_file *fp, struct nfsd4_open *open, 2473567d9829SNeilBrown struct nfs4_delegation **dp) 2474567d9829SNeilBrown { 2475567d9829SNeilBrown int flags; 2476b37ad28bSAl Viro __be32 status = nfserr_bad_stateid; 2477567d9829SNeilBrown 2478567d9829SNeilBrown *dp = find_delegation_file(fp, &open->op_delegate_stateid); 2479567d9829SNeilBrown if (*dp == NULL) 2480c44c5eebSNeilBrown goto out; 248124a0111eSJ. Bruce Fields flags = share_access_to_flags(open->op_share_access); 2482567d9829SNeilBrown status = nfs4_check_delegmode(*dp, flags); 2483567d9829SNeilBrown if (status) 2484567d9829SNeilBrown *dp = NULL; 2485c44c5eebSNeilBrown out: 2486c44c5eebSNeilBrown if (open->op_claim_type != NFS4_OPEN_CLAIM_DELEGATE_CUR) 2487c44c5eebSNeilBrown return nfs_ok; 2488c44c5eebSNeilBrown if (status) 2489c44c5eebSNeilBrown return status; 2490c44c5eebSNeilBrown open->op_stateowner->so_confirmed = 1; 2491c44c5eebSNeilBrown return nfs_ok; 2492567d9829SNeilBrown } 2493567d9829SNeilBrown 2494b37ad28bSAl Viro static __be32 24951da177e4SLinus Torvalds nfs4_check_open(struct nfs4_file *fp, struct nfsd4_open *open, struct nfs4_stateid **stpp) 24961da177e4SLinus Torvalds { 24971da177e4SLinus Torvalds struct nfs4_stateid *local; 2498b37ad28bSAl Viro __be32 status = nfserr_share_denied; 24991da177e4SLinus Torvalds struct nfs4_stateowner *sop = open->op_stateowner; 25001da177e4SLinus Torvalds 25018beefa24SNeilBrown list_for_each_entry(local, &fp->fi_stateids, st_perfile) { 25021da177e4SLinus Torvalds /* ignore lock owners */ 25031da177e4SLinus Torvalds if (local->st_stateowner->so_is_open_owner == 0) 25041da177e4SLinus Torvalds continue; 25051da177e4SLinus Torvalds /* remember if we have seen this open owner */ 25061da177e4SLinus Torvalds if (local->st_stateowner == sop) 25071da177e4SLinus Torvalds *stpp = local; 25081da177e4SLinus Torvalds /* check for conflicting share reservations */ 25091da177e4SLinus Torvalds if (!test_share(local, open)) 25101da177e4SLinus Torvalds goto out; 25111da177e4SLinus Torvalds } 25121da177e4SLinus Torvalds status = 0; 25131da177e4SLinus Torvalds out: 25141da177e4SLinus Torvalds return status; 25151da177e4SLinus Torvalds } 25161da177e4SLinus Torvalds 25175ac049acSNeilBrown static inline struct nfs4_stateid * 25185ac049acSNeilBrown nfs4_alloc_stateid(void) 25195ac049acSNeilBrown { 25205ac049acSNeilBrown return kmem_cache_alloc(stateid_slab, GFP_KERNEL); 25215ac049acSNeilBrown } 25225ac049acSNeilBrown 252321fb4016SJ. Bruce Fields static inline int nfs4_access_to_access(u32 nfs4_access) 252421fb4016SJ. Bruce Fields { 252521fb4016SJ. Bruce Fields int flags = 0; 252621fb4016SJ. Bruce Fields 252721fb4016SJ. Bruce Fields if (nfs4_access & NFS4_SHARE_ACCESS_READ) 252821fb4016SJ. Bruce Fields flags |= NFSD_MAY_READ; 252921fb4016SJ. Bruce Fields if (nfs4_access & NFS4_SHARE_ACCESS_WRITE) 253021fb4016SJ. Bruce Fields flags |= NFSD_MAY_WRITE; 253121fb4016SJ. Bruce Fields return flags; 253221fb4016SJ. Bruce Fields } 253321fb4016SJ. Bruce Fields 2534f9d7562fSJ. Bruce Fields static __be32 nfs4_get_vfs_file(struct svc_rqst *rqstp, struct nfs4_file 2535f9d7562fSJ. Bruce Fields *fp, struct svc_fh *cur_fh, u32 nfs4_access) 2536f9d7562fSJ. Bruce Fields { 2537f9d7562fSJ. Bruce Fields __be32 status; 2538f9d7562fSJ. Bruce Fields int oflag = nfs4_access_to_omode(nfs4_access); 2539f9d7562fSJ. Bruce Fields int access = nfs4_access_to_access(nfs4_access); 2540f9d7562fSJ. Bruce Fields 2541f9d7562fSJ. Bruce Fields if (!fp->fi_fds[oflag]) { 2542f9d7562fSJ. Bruce Fields status = nfsd_open(rqstp, cur_fh, S_IFREG, access, 2543f9d7562fSJ. Bruce Fields &fp->fi_fds[oflag]); 2544f9d7562fSJ. Bruce Fields if (status) 2545f9d7562fSJ. Bruce Fields return status; 2546f9d7562fSJ. Bruce Fields } 2547f9d7562fSJ. Bruce Fields nfs4_file_get_access(fp, oflag); 2548f9d7562fSJ. Bruce Fields 2549f9d7562fSJ. Bruce Fields return nfs_ok; 2550f9d7562fSJ. Bruce Fields } 2551f9d7562fSJ. Bruce Fields 2552b37ad28bSAl Viro static __be32 25531da177e4SLinus Torvalds nfs4_new_open(struct svc_rqst *rqstp, struct nfs4_stateid **stpp, 2554f9d7562fSJ. Bruce Fields struct nfs4_file *fp, struct svc_fh *cur_fh, 2555f9d7562fSJ. Bruce Fields struct nfsd4_open *open) 25561da177e4SLinus Torvalds { 25571da177e4SLinus Torvalds struct nfs4_stateid *stp; 2558f9d7562fSJ. Bruce Fields __be32 status; 25591da177e4SLinus Torvalds 25605ac049acSNeilBrown stp = nfs4_alloc_stateid(); 25611da177e4SLinus Torvalds if (stp == NULL) 25621da177e4SLinus Torvalds return nfserr_resource; 25631da177e4SLinus Torvalds 2564f9d7562fSJ. Bruce Fields status = nfs4_get_vfs_file(rqstp, fp, cur_fh, open->op_share_access); 25651da177e4SLinus Torvalds if (status) { 25665ac049acSNeilBrown kmem_cache_free(stateid_slab, stp); 25671da177e4SLinus Torvalds return status; 25681da177e4SLinus Torvalds } 25691da177e4SLinus Torvalds *stpp = stp; 25701da177e4SLinus Torvalds return 0; 25711da177e4SLinus Torvalds } 25721da177e4SLinus Torvalds 2573b37ad28bSAl Viro static inline __be32 25741da177e4SLinus Torvalds nfsd4_truncate(struct svc_rqst *rqstp, struct svc_fh *fh, 25751da177e4SLinus Torvalds struct nfsd4_open *open) 25761da177e4SLinus Torvalds { 25771da177e4SLinus Torvalds struct iattr iattr = { 25781da177e4SLinus Torvalds .ia_valid = ATTR_SIZE, 25791da177e4SLinus Torvalds .ia_size = 0, 25801da177e4SLinus Torvalds }; 25811da177e4SLinus Torvalds if (!open->op_truncate) 25821da177e4SLinus Torvalds return 0; 25831da177e4SLinus Torvalds if (!(open->op_share_access & NFS4_SHARE_ACCESS_WRITE)) 25849246585aSAl Viro return nfserr_inval; 25851da177e4SLinus Torvalds return nfsd_setattr(rqstp, fh, &iattr, 0, (time_t)0); 25861da177e4SLinus Torvalds } 25871da177e4SLinus Torvalds 2588b37ad28bSAl Viro static __be32 2589f9d7562fSJ. Bruce Fields nfs4_upgrade_open(struct svc_rqst *rqstp, struct nfs4_file *fp, struct svc_fh *cur_fh, struct nfs4_stateid *stp, struct nfsd4_open *open) 25901da177e4SLinus Torvalds { 25917d947842SJ. Bruce Fields u32 op_share_access = open->op_share_access & ~NFS4_SHARE_WANT_MASK; 25927d947842SJ. Bruce Fields bool new_access; 2593b37ad28bSAl Viro __be32 status; 25941da177e4SLinus Torvalds 25957d947842SJ. Bruce Fields new_access = !test_bit(op_share_access, &stp->st_access_bmap); 2596f9d7562fSJ. Bruce Fields if (new_access) { 25977d947842SJ. Bruce Fields status = nfs4_get_vfs_file(rqstp, fp, cur_fh, op_share_access); 2598f9d7562fSJ. Bruce Fields if (status) 2599f9d7562fSJ. Bruce Fields return status; 26006c26d08fSJ. Bruce Fields } 26011da177e4SLinus Torvalds status = nfsd4_truncate(rqstp, cur_fh, open); 26021da177e4SLinus Torvalds if (status) { 2603f9d7562fSJ. Bruce Fields if (new_access) { 2604f9d7562fSJ. Bruce Fields int oflag = nfs4_access_to_omode(new_access); 2605f9d7562fSJ. Bruce Fields nfs4_file_put_access(fp, oflag); 2606f9d7562fSJ. Bruce Fields } 26071da177e4SLinus Torvalds return status; 26081da177e4SLinus Torvalds } 26091da177e4SLinus Torvalds /* remember the open */ 261024a0111eSJ. Bruce Fields __set_bit(op_share_access, &stp->st_access_bmap); 2611b55e0ba1SJ. Bruce Fields __set_bit(open->op_share_deny, &stp->st_deny_bmap); 26121da177e4SLinus Torvalds 26131da177e4SLinus Torvalds return nfs_ok; 26141da177e4SLinus Torvalds } 26151da177e4SLinus Torvalds 26161da177e4SLinus Torvalds 26171da177e4SLinus Torvalds static void 261837515177SNeilBrown nfs4_set_claim_prev(struct nfsd4_open *open) 26191da177e4SLinus Torvalds { 26201da177e4SLinus Torvalds open->op_stateowner->so_confirmed = 1; 2621c7b9a459SNeilBrown open->op_stateowner->so_client->cl_firststate = 1; 26221da177e4SLinus Torvalds } 26231da177e4SLinus Torvalds 262414a24e99SJ. Bruce Fields /* Should we give out recallable state?: */ 262514a24e99SJ. Bruce Fields static bool nfsd4_cb_channel_good(struct nfs4_client *clp) 262614a24e99SJ. Bruce Fields { 262714a24e99SJ. Bruce Fields if (clp->cl_cb_state == NFSD4_CB_UP) 262814a24e99SJ. Bruce Fields return true; 262914a24e99SJ. Bruce Fields /* 263014a24e99SJ. Bruce Fields * In the sessions case, since we don't have to establish a 263114a24e99SJ. Bruce Fields * separate connection for callbacks, we assume it's OK 263214a24e99SJ. Bruce Fields * until we hear otherwise: 263314a24e99SJ. Bruce Fields */ 263414a24e99SJ. Bruce Fields return clp->cl_minorversion && clp->cl_cb_state == NFSD4_CB_UNKNOWN; 263514a24e99SJ. Bruce Fields } 263614a24e99SJ. Bruce Fields 263722d38c4cSJ. Bruce Fields static struct file_lock *nfs4_alloc_init_lease(struct nfs4_delegation *dp, int flag) 263822d38c4cSJ. Bruce Fields { 263922d38c4cSJ. Bruce Fields struct file_lock *fl; 264022d38c4cSJ. Bruce Fields 264122d38c4cSJ. Bruce Fields fl = locks_alloc_lock(); 264222d38c4cSJ. Bruce Fields if (!fl) 264322d38c4cSJ. Bruce Fields return NULL; 264422d38c4cSJ. Bruce Fields locks_init_lock(fl); 264522d38c4cSJ. Bruce Fields fl->fl_lmops = &nfsd_lease_mng_ops; 264622d38c4cSJ. Bruce Fields fl->fl_flags = FL_LEASE; 264722d38c4cSJ. Bruce Fields fl->fl_type = flag == NFS4_OPEN_DELEGATE_READ? F_RDLCK: F_WRLCK; 264822d38c4cSJ. Bruce Fields fl->fl_end = OFFSET_MAX; 2649acfdf5c3SJ. Bruce Fields fl->fl_owner = (fl_owner_t)(dp->dl_file); 265022d38c4cSJ. Bruce Fields fl->fl_pid = current->tgid; 265122d38c4cSJ. Bruce Fields return fl; 265222d38c4cSJ. Bruce Fields } 265322d38c4cSJ. Bruce Fields 2654edab9782SJ. Bruce Fields static int nfs4_setlease(struct nfs4_delegation *dp, int flag) 2655edab9782SJ. Bruce Fields { 2656acfdf5c3SJ. Bruce Fields struct nfs4_file *fp = dp->dl_file; 2657edab9782SJ. Bruce Fields struct file_lock *fl; 2658edab9782SJ. Bruce Fields int status; 2659edab9782SJ. Bruce Fields 2660edab9782SJ. Bruce Fields fl = nfs4_alloc_init_lease(dp, flag); 2661edab9782SJ. Bruce Fields if (!fl) 2662edab9782SJ. Bruce Fields return -ENOMEM; 2663acfdf5c3SJ. Bruce Fields fl->fl_file = find_readable_file(fp); 2664acfdf5c3SJ. Bruce Fields list_add(&dp->dl_perclnt, &dp->dl_client->cl_delegations); 2665acfdf5c3SJ. Bruce Fields status = vfs_setlease(fl->fl_file, fl->fl_type, &fl); 2666edab9782SJ. Bruce Fields if (status) { 2667acfdf5c3SJ. Bruce Fields list_del_init(&dp->dl_perclnt); 2668edab9782SJ. Bruce Fields locks_free_lock(fl); 2669edab9782SJ. Bruce Fields return -ENOMEM; 2670edab9782SJ. Bruce Fields } 2671acfdf5c3SJ. Bruce Fields fp->fi_lease = fl; 2672acfdf5c3SJ. Bruce Fields fp->fi_deleg_file = fl->fl_file; 2673acfdf5c3SJ. Bruce Fields get_file(fp->fi_deleg_file); 2674acfdf5c3SJ. Bruce Fields atomic_set(&fp->fi_delegees, 1); 2675acfdf5c3SJ. Bruce Fields list_add(&dp->dl_perfile, &fp->fi_delegations); 2676acfdf5c3SJ. Bruce Fields return 0; 2677acfdf5c3SJ. Bruce Fields } 2678acfdf5c3SJ. Bruce Fields 2679acfdf5c3SJ. Bruce Fields static int nfs4_set_delegation(struct nfs4_delegation *dp, int flag) 2680acfdf5c3SJ. Bruce Fields { 2681acfdf5c3SJ. Bruce Fields struct nfs4_file *fp = dp->dl_file; 2682acfdf5c3SJ. Bruce Fields 2683acfdf5c3SJ. Bruce Fields if (!fp->fi_lease) 2684acfdf5c3SJ. Bruce Fields return nfs4_setlease(dp, flag); 2685acfdf5c3SJ. Bruce Fields spin_lock(&recall_lock); 2686acfdf5c3SJ. Bruce Fields if (fp->fi_had_conflict) { 2687acfdf5c3SJ. Bruce Fields spin_unlock(&recall_lock); 2688acfdf5c3SJ. Bruce Fields return -EAGAIN; 2689acfdf5c3SJ. Bruce Fields } 2690acfdf5c3SJ. Bruce Fields atomic_inc(&fp->fi_delegees); 2691acfdf5c3SJ. Bruce Fields list_add(&dp->dl_perfile, &fp->fi_delegations); 2692acfdf5c3SJ. Bruce Fields spin_unlock(&recall_lock); 2693acfdf5c3SJ. Bruce Fields list_add(&dp->dl_perclnt, &dp->dl_client->cl_delegations); 2694edab9782SJ. Bruce Fields return 0; 2695edab9782SJ. Bruce Fields } 2696edab9782SJ. Bruce Fields 26971da177e4SLinus Torvalds /* 26981da177e4SLinus Torvalds * Attempt to hand out a delegation. 26991da177e4SLinus Torvalds */ 27001da177e4SLinus Torvalds static void 27011da177e4SLinus Torvalds nfs4_open_delegation(struct svc_fh *fh, struct nfsd4_open *open, struct nfs4_stateid *stp) 27021da177e4SLinus Torvalds { 27031da177e4SLinus Torvalds struct nfs4_delegation *dp; 27041da177e4SLinus Torvalds struct nfs4_stateowner *sop = stp->st_stateowner; 270514a24e99SJ. Bruce Fields int cb_up; 27061da177e4SLinus Torvalds int status, flag = 0; 27071da177e4SLinus Torvalds 270814a24e99SJ. Bruce Fields cb_up = nfsd4_cb_channel_good(sop->so_client); 27091da177e4SLinus Torvalds flag = NFS4_OPEN_DELEGATE_NONE; 27107b190fecSNeilBrown open->op_recall = 0; 27117b190fecSNeilBrown switch (open->op_claim_type) { 27127b190fecSNeilBrown case NFS4_OPEN_CLAIM_PREVIOUS: 27132bf23875SJ. Bruce Fields if (!cb_up) 27147b190fecSNeilBrown open->op_recall = 1; 27157b190fecSNeilBrown flag = open->op_delegate_type; 27167b190fecSNeilBrown if (flag == NFS4_OPEN_DELEGATE_NONE) 27171da177e4SLinus Torvalds goto out; 27187b190fecSNeilBrown break; 27197b190fecSNeilBrown case NFS4_OPEN_CLAIM_NULL: 27207b190fecSNeilBrown /* Let's not give out any delegations till everyone's 27217b190fecSNeilBrown * had the chance to reclaim theirs.... */ 2722af558e33SJ. Bruce Fields if (locks_in_grace()) 27237b190fecSNeilBrown goto out; 27242bf23875SJ. Bruce Fields if (!cb_up || !sop->so_confirmed) 27257b190fecSNeilBrown goto out; 27261da177e4SLinus Torvalds if (open->op_share_access & NFS4_SHARE_ACCESS_WRITE) 27271da177e4SLinus Torvalds flag = NFS4_OPEN_DELEGATE_WRITE; 27281da177e4SLinus Torvalds else 27291da177e4SLinus Torvalds flag = NFS4_OPEN_DELEGATE_READ; 27307b190fecSNeilBrown break; 27317b190fecSNeilBrown default: 27327b190fecSNeilBrown goto out; 27337b190fecSNeilBrown } 27341da177e4SLinus Torvalds 27351da177e4SLinus Torvalds dp = alloc_init_deleg(sop->so_client, stp, fh, flag); 2736dd239cc0SJ. Bruce Fields if (dp == NULL) 2737dd239cc0SJ. Bruce Fields goto out_no_deleg; 2738acfdf5c3SJ. Bruce Fields status = nfs4_set_delegation(dp, flag); 2739edab9782SJ. Bruce Fields if (status) 2740dd239cc0SJ. Bruce Fields goto out_free; 27411da177e4SLinus Torvalds 27421da177e4SLinus Torvalds memcpy(&open->op_delegate_stateid, &dp->dl_stateid, sizeof(dp->dl_stateid)); 27431da177e4SLinus Torvalds 27448c10cbdbSBenny Halevy dprintk("NFSD: delegation stateid=" STATEID_FMT "\n", 27458c10cbdbSBenny Halevy STATEID_VAL(&dp->dl_stateid)); 27461da177e4SLinus Torvalds out: 27477b190fecSNeilBrown if (open->op_claim_type == NFS4_OPEN_CLAIM_PREVIOUS 27487b190fecSNeilBrown && flag == NFS4_OPEN_DELEGATE_NONE 27497b190fecSNeilBrown && open->op_delegate_type != NFS4_OPEN_DELEGATE_NONE) 27502fdada03SJ. Bruce Fields dprintk("NFSD: WARNING: refusing delegation reclaim\n"); 27511da177e4SLinus Torvalds open->op_delegate_type = flag; 2752dd239cc0SJ. Bruce Fields return; 2753dd239cc0SJ. Bruce Fields out_free: 2754acfdf5c3SJ. Bruce Fields nfs4_put_delegation(dp); 2755dd239cc0SJ. Bruce Fields out_no_deleg: 2756dd239cc0SJ. Bruce Fields flag = NFS4_OPEN_DELEGATE_NONE; 2757dd239cc0SJ. Bruce Fields goto out; 27581da177e4SLinus Torvalds } 27591da177e4SLinus Torvalds 27601da177e4SLinus Torvalds /* 27611da177e4SLinus Torvalds * called with nfs4_lock_state() held. 27621da177e4SLinus Torvalds */ 2763b37ad28bSAl Viro __be32 27641da177e4SLinus Torvalds nfsd4_process_open2(struct svc_rqst *rqstp, struct svc_fh *current_fh, struct nfsd4_open *open) 27651da177e4SLinus Torvalds { 27666668958fSAndy Adamson struct nfsd4_compoundres *resp = rqstp->rq_resp; 27671da177e4SLinus Torvalds struct nfs4_file *fp = NULL; 27681da177e4SLinus Torvalds struct inode *ino = current_fh->fh_dentry->d_inode; 27691da177e4SLinus Torvalds struct nfs4_stateid *stp = NULL; 2770567d9829SNeilBrown struct nfs4_delegation *dp = NULL; 2771b37ad28bSAl Viro __be32 status; 27721da177e4SLinus Torvalds 27731da177e4SLinus Torvalds status = nfserr_inval; 2774d87a8adeSAndy Adamson if (!access_valid(open->op_share_access, resp->cstate.minorversion) 2775ba5a6a19SJ. Bruce Fields || !deny_valid(open->op_share_deny)) 27761da177e4SLinus Torvalds goto out; 27771da177e4SLinus Torvalds /* 27781da177e4SLinus Torvalds * Lookup file; if found, lookup stateid and check open request, 27791da177e4SLinus Torvalds * and check for delegations in the process of being recalled. 27801da177e4SLinus Torvalds * If not found, create the nfs4_file struct 27811da177e4SLinus Torvalds */ 27821da177e4SLinus Torvalds fp = find_file(ino); 27831da177e4SLinus Torvalds if (fp) { 27841da177e4SLinus Torvalds if ((status = nfs4_check_open(fp, open, &stp))) 27851da177e4SLinus Torvalds goto out; 2786c44c5eebSNeilBrown status = nfs4_check_deleg(fp, open, &dp); 2787c44c5eebSNeilBrown if (status) 2788c44c5eebSNeilBrown goto out; 27891da177e4SLinus Torvalds } else { 2790c44c5eebSNeilBrown status = nfserr_bad_stateid; 2791c44c5eebSNeilBrown if (open->op_claim_type == NFS4_OPEN_CLAIM_DELEGATE_CUR) 2792c44c5eebSNeilBrown goto out; 27931da177e4SLinus Torvalds status = nfserr_resource; 27941da177e4SLinus Torvalds fp = alloc_init_file(ino); 27951da177e4SLinus Torvalds if (fp == NULL) 27961da177e4SLinus Torvalds goto out; 27971da177e4SLinus Torvalds } 27981da177e4SLinus Torvalds 27991da177e4SLinus Torvalds /* 28001da177e4SLinus Torvalds * OPEN the file, or upgrade an existing OPEN. 28011da177e4SLinus Torvalds * If truncate fails, the OPEN fails. 28021da177e4SLinus Torvalds */ 28031da177e4SLinus Torvalds if (stp) { 28041da177e4SLinus Torvalds /* Stateid was found, this is an OPEN upgrade */ 2805f9d7562fSJ. Bruce Fields status = nfs4_upgrade_open(rqstp, fp, current_fh, stp, open); 28061da177e4SLinus Torvalds if (status) 28071da177e4SLinus Torvalds goto out; 2808444c2c07SNeilBrown update_stateid(&stp->st_stateid); 28091da177e4SLinus Torvalds } else { 2810f9d7562fSJ. Bruce Fields status = nfs4_new_open(rqstp, &stp, fp, current_fh, open); 2811567d9829SNeilBrown if (status) 28121da177e4SLinus Torvalds goto out; 28131da177e4SLinus Torvalds init_stateid(stp, fp, open); 28141da177e4SLinus Torvalds status = nfsd4_truncate(rqstp, current_fh, open); 28151da177e4SLinus Torvalds if (status) { 28162283963fSJ. Bruce Fields release_open_stateid(stp); 28171da177e4SLinus Torvalds goto out; 28181da177e4SLinus Torvalds } 28196668958fSAndy Adamson if (nfsd4_has_session(&resp->cstate)) 28206668958fSAndy Adamson update_stateid(&stp->st_stateid); 28211da177e4SLinus Torvalds } 28221da177e4SLinus Torvalds memcpy(&open->op_stateid, &stp->st_stateid, sizeof(stateid_t)); 28231da177e4SLinus Torvalds 28244dc6ec00SJ. Bruce Fields if (nfsd4_has_session(&resp->cstate)) 28256668958fSAndy Adamson open->op_stateowner->so_confirmed = 1; 28266668958fSAndy Adamson 28271da177e4SLinus Torvalds /* 28281da177e4SLinus Torvalds * Attempt to hand out a delegation. No error return, because the 28291da177e4SLinus Torvalds * OPEN succeeds even if we fail. 28301da177e4SLinus Torvalds */ 28311da177e4SLinus Torvalds nfs4_open_delegation(current_fh, open, stp); 28321da177e4SLinus Torvalds 28331da177e4SLinus Torvalds status = nfs_ok; 28341da177e4SLinus Torvalds 28358c10cbdbSBenny Halevy dprintk("%s: stateid=" STATEID_FMT "\n", __func__, 28368c10cbdbSBenny Halevy STATEID_VAL(&stp->st_stateid)); 28371da177e4SLinus Torvalds out: 283813cd2184SNeilBrown if (fp) 283913cd2184SNeilBrown put_nfs4_file(fp); 284037515177SNeilBrown if (status == 0 && open->op_claim_type == NFS4_OPEN_CLAIM_PREVIOUS) 284137515177SNeilBrown nfs4_set_claim_prev(open); 28421da177e4SLinus Torvalds /* 28431da177e4SLinus Torvalds * To finish the open response, we just need to set the rflags. 28441da177e4SLinus Torvalds */ 28451da177e4SLinus Torvalds open->op_rflags = NFS4_OPEN_RESULT_LOCKTYPE_POSIX; 28466668958fSAndy Adamson if (!open->op_stateowner->so_confirmed && 28476668958fSAndy Adamson !nfsd4_has_session(&resp->cstate)) 28481da177e4SLinus Torvalds open->op_rflags |= NFS4_OPEN_RESULT_CONFIRM; 28491da177e4SLinus Torvalds 28501da177e4SLinus Torvalds return status; 28511da177e4SLinus Torvalds } 28521da177e4SLinus Torvalds 2853b37ad28bSAl Viro __be32 2854b591480bSJ.Bruce Fields nfsd4_renew(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, 2855b591480bSJ.Bruce Fields clientid_t *clid) 28561da177e4SLinus Torvalds { 28571da177e4SLinus Torvalds struct nfs4_client *clp; 2858b37ad28bSAl Viro __be32 status; 28591da177e4SLinus Torvalds 28601da177e4SLinus Torvalds nfs4_lock_state(); 28611da177e4SLinus Torvalds dprintk("process_renew(%08x/%08x): starting\n", 28621da177e4SLinus Torvalds clid->cl_boot, clid->cl_id); 28631da177e4SLinus Torvalds status = nfserr_stale_clientid; 28641da177e4SLinus Torvalds if (STALE_CLIENTID(clid)) 28651da177e4SLinus Torvalds goto out; 28661da177e4SLinus Torvalds clp = find_confirmed_client(clid); 28671da177e4SLinus Torvalds status = nfserr_expired; 28681da177e4SLinus Torvalds if (clp == NULL) { 28691da177e4SLinus Torvalds /* We assume the client took too long to RENEW. */ 28701da177e4SLinus Torvalds dprintk("nfsd4_renew: clientid not found!\n"); 28711da177e4SLinus Torvalds goto out; 28721da177e4SLinus Torvalds } 28731da177e4SLinus Torvalds renew_client(clp); 28741da177e4SLinus Torvalds status = nfserr_cb_path_down; 2875ea1da636SNeilBrown if (!list_empty(&clp->cl_delegations) 287677a3569dSJ. Bruce Fields && clp->cl_cb_state != NFSD4_CB_UP) 28771da177e4SLinus Torvalds goto out; 28781da177e4SLinus Torvalds status = nfs_ok; 28791da177e4SLinus Torvalds out: 28801da177e4SLinus Torvalds nfs4_unlock_state(); 28811da177e4SLinus Torvalds return status; 28821da177e4SLinus Torvalds } 28831da177e4SLinus Torvalds 2884af558e33SJ. Bruce Fields struct lock_manager nfsd4_manager = { 2885af558e33SJ. Bruce Fields }; 2886af558e33SJ. Bruce Fields 2887a76b4319SNeilBrown static void 2888af558e33SJ. Bruce Fields nfsd4_end_grace(void) 2889a76b4319SNeilBrown { 2890a76b4319SNeilBrown dprintk("NFSD: end of grace period\n"); 2891c7b9a459SNeilBrown nfsd4_recdir_purge_old(); 2892af558e33SJ. Bruce Fields locks_end_grace(&nfsd4_manager); 2893e46b498cSJ. Bruce Fields /* 2894e46b498cSJ. Bruce Fields * Now that every NFSv4 client has had the chance to recover and 2895e46b498cSJ. Bruce Fields * to see the (possibly new, possibly shorter) lease time, we 2896e46b498cSJ. Bruce Fields * can safely set the next grace time to the current lease time: 2897e46b498cSJ. Bruce Fields */ 2898e46b498cSJ. Bruce Fields nfsd4_grace = nfsd4_lease; 2899a76b4319SNeilBrown } 2900a76b4319SNeilBrown 2901fd39ca9aSNeilBrown static time_t 29021da177e4SLinus Torvalds nfs4_laundromat(void) 29031da177e4SLinus Torvalds { 29041da177e4SLinus Torvalds struct nfs4_client *clp; 29051da177e4SLinus Torvalds struct nfs4_stateowner *sop; 29061da177e4SLinus Torvalds struct nfs4_delegation *dp; 29071da177e4SLinus Torvalds struct list_head *pos, *next, reaplist; 2908cf07d2eaSJ. Bruce Fields time_t cutoff = get_seconds() - nfsd4_lease; 2909cf07d2eaSJ. Bruce Fields time_t t, clientid_val = nfsd4_lease; 2910cf07d2eaSJ. Bruce Fields time_t u, test_val = nfsd4_lease; 29111da177e4SLinus Torvalds 29121da177e4SLinus Torvalds nfs4_lock_state(); 29131da177e4SLinus Torvalds 29141da177e4SLinus Torvalds dprintk("NFSD: laundromat service - starting\n"); 2915af558e33SJ. Bruce Fields if (locks_in_grace()) 2916af558e33SJ. Bruce Fields nfsd4_end_grace(); 291736acb66bSBenny Halevy INIT_LIST_HEAD(&reaplist); 291836acb66bSBenny Halevy spin_lock(&client_lock); 29191da177e4SLinus Torvalds list_for_each_safe(pos, next, &client_lru) { 29201da177e4SLinus Torvalds clp = list_entry(pos, struct nfs4_client, cl_lru); 29211da177e4SLinus Torvalds if (time_after((unsigned long)clp->cl_time, (unsigned long)cutoff)) { 29221da177e4SLinus Torvalds t = clp->cl_time - cutoff; 29231da177e4SLinus Torvalds if (clientid_val > t) 29241da177e4SLinus Torvalds clientid_val = t; 29251da177e4SLinus Torvalds break; 29261da177e4SLinus Torvalds } 2927d7682988SBenny Halevy if (atomic_read(&clp->cl_refcount)) { 2928d7682988SBenny Halevy dprintk("NFSD: client in use (clientid %08x)\n", 2929d7682988SBenny Halevy clp->cl_clientid.cl_id); 2930d7682988SBenny Halevy continue; 2931d7682988SBenny Halevy } 2932d7682988SBenny Halevy unhash_client_locked(clp); 2933d7682988SBenny Halevy list_add(&clp->cl_lru, &reaplist); 293436acb66bSBenny Halevy } 293536acb66bSBenny Halevy spin_unlock(&client_lock); 293636acb66bSBenny Halevy list_for_each_safe(pos, next, &reaplist) { 293736acb66bSBenny Halevy clp = list_entry(pos, struct nfs4_client, cl_lru); 29381da177e4SLinus Torvalds dprintk("NFSD: purging unused client (clientid %08x)\n", 29391da177e4SLinus Torvalds clp->cl_clientid.cl_id); 2940c7b9a459SNeilBrown nfsd4_remove_clid_dir(clp); 29411da177e4SLinus Torvalds expire_client(clp); 29421da177e4SLinus Torvalds } 29431da177e4SLinus Torvalds spin_lock(&recall_lock); 29441da177e4SLinus Torvalds list_for_each_safe(pos, next, &del_recall_lru) { 29451da177e4SLinus Torvalds dp = list_entry (pos, struct nfs4_delegation, dl_recall_lru); 29461da177e4SLinus Torvalds if (time_after((unsigned long)dp->dl_time, (unsigned long)cutoff)) { 29471da177e4SLinus Torvalds u = dp->dl_time - cutoff; 29481da177e4SLinus Torvalds if (test_val > u) 29491da177e4SLinus Torvalds test_val = u; 29501da177e4SLinus Torvalds break; 29511da177e4SLinus Torvalds } 29521da177e4SLinus Torvalds list_move(&dp->dl_recall_lru, &reaplist); 29531da177e4SLinus Torvalds } 29541da177e4SLinus Torvalds spin_unlock(&recall_lock); 29551da177e4SLinus Torvalds list_for_each_safe(pos, next, &reaplist) { 29561da177e4SLinus Torvalds dp = list_entry (pos, struct nfs4_delegation, dl_recall_lru); 29571da177e4SLinus Torvalds list_del_init(&dp->dl_recall_lru); 29581da177e4SLinus Torvalds unhash_delegation(dp); 29591da177e4SLinus Torvalds } 2960cf07d2eaSJ. Bruce Fields test_val = nfsd4_lease; 29611da177e4SLinus Torvalds list_for_each_safe(pos, next, &close_lru) { 29621da177e4SLinus Torvalds sop = list_entry(pos, struct nfs4_stateowner, so_close_lru); 29631da177e4SLinus Torvalds if (time_after((unsigned long)sop->so_time, (unsigned long)cutoff)) { 29641da177e4SLinus Torvalds u = sop->so_time - cutoff; 29651da177e4SLinus Torvalds if (test_val > u) 29661da177e4SLinus Torvalds test_val = u; 29671da177e4SLinus Torvalds break; 29681da177e4SLinus Torvalds } 29691da177e4SLinus Torvalds dprintk("NFSD: purging unused open stateowner (so_id %d)\n", 29701da177e4SLinus Torvalds sop->so_id); 2971f044ff83SJ. Bruce Fields release_openowner(sop); 29721da177e4SLinus Torvalds } 29731da177e4SLinus Torvalds if (clientid_val < NFSD_LAUNDROMAT_MINTIMEOUT) 29741da177e4SLinus Torvalds clientid_val = NFSD_LAUNDROMAT_MINTIMEOUT; 29751da177e4SLinus Torvalds nfs4_unlock_state(); 29761da177e4SLinus Torvalds return clientid_val; 29771da177e4SLinus Torvalds } 29781da177e4SLinus Torvalds 2979a254b246SHarvey Harrison static struct workqueue_struct *laundry_wq; 2980a254b246SHarvey Harrison static void laundromat_main(struct work_struct *); 2981a254b246SHarvey Harrison static DECLARE_DELAYED_WORK(laundromat_work, laundromat_main); 2982a254b246SHarvey Harrison 2983a254b246SHarvey Harrison static void 2984c4028958SDavid Howells laundromat_main(struct work_struct *not_used) 29851da177e4SLinus Torvalds { 29861da177e4SLinus Torvalds time_t t; 29871da177e4SLinus Torvalds 29881da177e4SLinus Torvalds t = nfs4_laundromat(); 29891da177e4SLinus Torvalds dprintk("NFSD: laundromat_main - sleeping for %ld seconds\n", t); 299058da282bSNeilBrown queue_delayed_work(laundry_wq, &laundromat_work, t*HZ); 29911da177e4SLinus Torvalds } 29921da177e4SLinus Torvalds 2993fd39ca9aSNeilBrown static struct nfs4_stateowner * 2994f8816512SNeilBrown search_close_lru(u32 st_id, int flags) 2995f8816512SNeilBrown { 29961da177e4SLinus Torvalds struct nfs4_stateowner *local = NULL; 29971da177e4SLinus Torvalds 29981da177e4SLinus Torvalds if (flags & CLOSE_STATE) { 29991da177e4SLinus Torvalds list_for_each_entry(local, &close_lru, so_close_lru) { 30001da177e4SLinus Torvalds if (local->so_id == st_id) 30011da177e4SLinus Torvalds return local; 30021da177e4SLinus Torvalds } 30031da177e4SLinus Torvalds } 30041da177e4SLinus Torvalds return NULL; 30051da177e4SLinus Torvalds } 30061da177e4SLinus Torvalds 30071da177e4SLinus Torvalds static inline int 30081da177e4SLinus Torvalds nfs4_check_fh(struct svc_fh *fhp, struct nfs4_stateid *stp) 30091da177e4SLinus Torvalds { 3010f9d7562fSJ. Bruce Fields return fhp->fh_dentry->d_inode != stp->st_file->fi_inode; 30111da177e4SLinus Torvalds } 30121da177e4SLinus Torvalds 30131da177e4SLinus Torvalds static int 30141da177e4SLinus Torvalds STALE_STATEID(stateid_t *stateid) 30151da177e4SLinus Torvalds { 3016e4e83ea4SJ. Bruce Fields if (stateid->si_boot == boot_time) 3017e4e83ea4SJ. Bruce Fields return 0; 30188c10cbdbSBenny Halevy dprintk("NFSD: stale stateid " STATEID_FMT "!\n", 30198c10cbdbSBenny Halevy STATEID_VAL(stateid)); 30201da177e4SLinus Torvalds return 1; 30211da177e4SLinus Torvalds } 30221da177e4SLinus Torvalds 30231da177e4SLinus Torvalds static inline int 30241da177e4SLinus Torvalds access_permit_read(unsigned long access_bmap) 30251da177e4SLinus Torvalds { 30261da177e4SLinus Torvalds return test_bit(NFS4_SHARE_ACCESS_READ, &access_bmap) || 30271da177e4SLinus Torvalds test_bit(NFS4_SHARE_ACCESS_BOTH, &access_bmap) || 30281da177e4SLinus Torvalds test_bit(NFS4_SHARE_ACCESS_WRITE, &access_bmap); 30291da177e4SLinus Torvalds } 30301da177e4SLinus Torvalds 30311da177e4SLinus Torvalds static inline int 30321da177e4SLinus Torvalds access_permit_write(unsigned long access_bmap) 30331da177e4SLinus Torvalds { 30341da177e4SLinus Torvalds return test_bit(NFS4_SHARE_ACCESS_WRITE, &access_bmap) || 30351da177e4SLinus Torvalds test_bit(NFS4_SHARE_ACCESS_BOTH, &access_bmap); 30361da177e4SLinus Torvalds } 30371da177e4SLinus Torvalds 30381da177e4SLinus Torvalds static 3039b37ad28bSAl Viro __be32 nfs4_check_openmode(struct nfs4_stateid *stp, int flags) 30401da177e4SLinus Torvalds { 3041b37ad28bSAl Viro __be32 status = nfserr_openmode; 30421da177e4SLinus Torvalds 304302921914SJ. Bruce Fields /* For lock stateid's, we test the parent open, not the lock: */ 304402921914SJ. Bruce Fields if (stp->st_openstp) 304502921914SJ. Bruce Fields stp = stp->st_openstp; 30461da177e4SLinus Torvalds if ((flags & WR_STATE) && (!access_permit_write(stp->st_access_bmap))) 30471da177e4SLinus Torvalds goto out; 30481da177e4SLinus Torvalds if ((flags & RD_STATE) && (!access_permit_read(stp->st_access_bmap))) 30491da177e4SLinus Torvalds goto out; 30501da177e4SLinus Torvalds status = nfs_ok; 30511da177e4SLinus Torvalds out: 30521da177e4SLinus Torvalds return status; 30531da177e4SLinus Torvalds } 30541da177e4SLinus Torvalds 3055b37ad28bSAl Viro static inline __be32 30561da177e4SLinus Torvalds check_special_stateids(svc_fh *current_fh, stateid_t *stateid, int flags) 30571da177e4SLinus Torvalds { 3058203a8c8eSJ. Bruce Fields if (ONE_STATEID(stateid) && (flags & RD_STATE)) 30591da177e4SLinus Torvalds return nfs_ok; 3060af558e33SJ. Bruce Fields else if (locks_in_grace()) { 30611da177e4SLinus Torvalds /* Answer in remaining cases depends on existance of 30621da177e4SLinus Torvalds * conflicting state; so we must wait out the grace period. */ 30631da177e4SLinus Torvalds return nfserr_grace; 30641da177e4SLinus Torvalds } else if (flags & WR_STATE) 30651da177e4SLinus Torvalds return nfs4_share_conflict(current_fh, 30661da177e4SLinus Torvalds NFS4_SHARE_DENY_WRITE); 30671da177e4SLinus Torvalds else /* (flags & RD_STATE) && ZERO_STATEID(stateid) */ 30681da177e4SLinus Torvalds return nfs4_share_conflict(current_fh, 30691da177e4SLinus Torvalds NFS4_SHARE_DENY_READ); 30701da177e4SLinus Torvalds } 30711da177e4SLinus Torvalds 30721da177e4SLinus Torvalds /* 30731da177e4SLinus Torvalds * Allow READ/WRITE during grace period on recovered state only for files 30741da177e4SLinus Torvalds * that are not able to provide mandatory locking. 30751da177e4SLinus Torvalds */ 30761da177e4SLinus Torvalds static inline int 307718f82731SJ. Bruce Fields grace_disallows_io(struct inode *inode) 30781da177e4SLinus Torvalds { 3079203a8c8eSJ. Bruce Fields return locks_in_grace() && mandatory_lock(inode); 30801da177e4SLinus Torvalds } 30811da177e4SLinus Torvalds 30826668958fSAndy Adamson static int check_stateid_generation(stateid_t *in, stateid_t *ref, int flags) 30830836f587SJ. Bruce Fields { 30846668958fSAndy Adamson /* 30856668958fSAndy Adamson * When sessions are used the stateid generation number is ignored 30866668958fSAndy Adamson * when it is zero. 30876668958fSAndy Adamson */ 30886668958fSAndy Adamson if ((flags & HAS_SESSION) && in->si_generation == 0) 30896668958fSAndy Adamson goto out; 30906668958fSAndy Adamson 30910836f587SJ. Bruce Fields /* If the client sends us a stateid from the future, it's buggy: */ 30920836f587SJ. Bruce Fields if (in->si_generation > ref->si_generation) 30930836f587SJ. Bruce Fields return nfserr_bad_stateid; 30940836f587SJ. Bruce Fields /* 30950836f587SJ. Bruce Fields * The following, however, can happen. For example, if the 30960836f587SJ. Bruce Fields * client sends an open and some IO at the same time, the open 30970836f587SJ. Bruce Fields * may bump si_generation while the IO is still in flight. 30980836f587SJ. Bruce Fields * Thanks to hard links and renames, the client never knows what 30990836f587SJ. Bruce Fields * file an open will affect. So it could avoid that situation 31000836f587SJ. Bruce Fields * only by serializing all opens and IO from the same open 31010836f587SJ. Bruce Fields * owner. To recover from the old_stateid error, the client 31020836f587SJ. Bruce Fields * will just have to retry the IO: 31030836f587SJ. Bruce Fields */ 31040836f587SJ. Bruce Fields if (in->si_generation < ref->si_generation) 31050836f587SJ. Bruce Fields return nfserr_old_stateid; 31066668958fSAndy Adamson out: 31070836f587SJ. Bruce Fields return nfs_ok; 31080836f587SJ. Bruce Fields } 31090836f587SJ. Bruce Fields 31103e633079SJ. Bruce Fields static int is_delegation_stateid(stateid_t *stateid) 31113e633079SJ. Bruce Fields { 31123e633079SJ. Bruce Fields return stateid->si_fileid == 0; 31133e633079SJ. Bruce Fields } 31143e633079SJ. Bruce Fields 31151da177e4SLinus Torvalds /* 31161da177e4SLinus Torvalds * Checks for stateid operations 31171da177e4SLinus Torvalds */ 3118b37ad28bSAl Viro __be32 3119dd453dfdSBenny Halevy nfs4_preprocess_stateid_op(struct nfsd4_compound_state *cstate, 3120dd453dfdSBenny Halevy stateid_t *stateid, int flags, struct file **filpp) 31211da177e4SLinus Torvalds { 31221da177e4SLinus Torvalds struct nfs4_stateid *stp = NULL; 31231da177e4SLinus Torvalds struct nfs4_delegation *dp = NULL; 3124dd453dfdSBenny Halevy struct svc_fh *current_fh = &cstate->current_fh; 31251da177e4SLinus Torvalds struct inode *ino = current_fh->fh_dentry->d_inode; 3126b37ad28bSAl Viro __be32 status; 31271da177e4SLinus Torvalds 31281da177e4SLinus Torvalds if (filpp) 31291da177e4SLinus Torvalds *filpp = NULL; 31301da177e4SLinus Torvalds 313118f82731SJ. Bruce Fields if (grace_disallows_io(ino)) 31321da177e4SLinus Torvalds return nfserr_grace; 31331da177e4SLinus Torvalds 31346668958fSAndy Adamson if (nfsd4_has_session(cstate)) 31356668958fSAndy Adamson flags |= HAS_SESSION; 31366668958fSAndy Adamson 31371da177e4SLinus Torvalds if (ZERO_STATEID(stateid) || ONE_STATEID(stateid)) 31381da177e4SLinus Torvalds return check_special_stateids(current_fh, stateid, flags); 31391da177e4SLinus Torvalds 31401da177e4SLinus Torvalds status = nfserr_stale_stateid; 31411da177e4SLinus Torvalds if (STALE_STATEID(stateid)) 31421da177e4SLinus Torvalds goto out; 31431da177e4SLinus Torvalds 314433515142SJ. Bruce Fields /* 314533515142SJ. Bruce Fields * We assume that any stateid that has the current boot time, 314633515142SJ. Bruce Fields * but that we can't find, is expired: 314733515142SJ. Bruce Fields */ 314833515142SJ. Bruce Fields status = nfserr_expired; 31493e633079SJ. Bruce Fields if (is_delegation_stateid(stateid)) { 3150a4455be0SJ. Bruce Fields dp = find_delegation_stateid(ino, stateid); 3151e4e83ea4SJ. Bruce Fields if (!dp) 31521da177e4SLinus Torvalds goto out; 31536668958fSAndy Adamson status = check_stateid_generation(stateid, &dp->dl_stateid, 31546668958fSAndy Adamson flags); 31550c2a498fSJ. Bruce Fields if (status) 31560c2a498fSJ. Bruce Fields goto out; 3157dc9bf700SJ. Bruce Fields status = nfs4_check_delegmode(dp, flags); 3158dc9bf700SJ. Bruce Fields if (status) 3159dc9bf700SJ. Bruce Fields goto out; 3160dc9bf700SJ. Bruce Fields renew_client(dp->dl_client); 316143b0178eSDan Carpenter if (filpp) { 3162acfdf5c3SJ. Bruce Fields *filpp = dp->dl_file->fi_deleg_file; 3163f9d7562fSJ. Bruce Fields BUG_ON(!*filpp); 316443b0178eSDan Carpenter } 31651da177e4SLinus Torvalds } else { /* open or lock stateid */ 3166a4455be0SJ. Bruce Fields stp = find_stateid(stateid, flags); 3167e4e83ea4SJ. Bruce Fields if (!stp) 31681da177e4SLinus Torvalds goto out; 316933515142SJ. Bruce Fields status = nfserr_bad_stateid; 31706150ef0dSJ. Bruce Fields if (nfs4_check_fh(current_fh, stp)) 31711da177e4SLinus Torvalds goto out; 31721da177e4SLinus Torvalds if (!stp->st_stateowner->so_confirmed) 31731da177e4SLinus Torvalds goto out; 31746668958fSAndy Adamson status = check_stateid_generation(stateid, &stp->st_stateid, 31756668958fSAndy Adamson flags); 31760836f587SJ. Bruce Fields if (status) 31771da177e4SLinus Torvalds goto out; 3178a4455be0SJ. Bruce Fields status = nfs4_check_openmode(stp, flags); 3179a4455be0SJ. Bruce Fields if (status) 31801da177e4SLinus Torvalds goto out; 31811da177e4SLinus Torvalds renew_client(stp->st_stateowner->so_client); 3182f9d7562fSJ. Bruce Fields if (filpp) { 3183f9d7562fSJ. Bruce Fields if (flags & RD_STATE) 3184f9d7562fSJ. Bruce Fields *filpp = find_readable_file(stp->st_file); 3185f9d7562fSJ. Bruce Fields else 3186f9d7562fSJ. Bruce Fields *filpp = find_writeable_file(stp->st_file); 3187f9d7562fSJ. Bruce Fields } 31881da177e4SLinus Torvalds } 31891da177e4SLinus Torvalds status = nfs_ok; 31901da177e4SLinus Torvalds out: 31911da177e4SLinus Torvalds return status; 31921da177e4SLinus Torvalds } 31931da177e4SLinus Torvalds 31944c4cd222SNeilBrown static inline int 31954c4cd222SNeilBrown setlkflg (int type) 31964c4cd222SNeilBrown { 31974c4cd222SNeilBrown return (type == NFS4_READW_LT || type == NFS4_READ_LT) ? 31984c4cd222SNeilBrown RD_STATE : WR_STATE; 31994c4cd222SNeilBrown } 32001da177e4SLinus Torvalds 32011da177e4SLinus Torvalds /* 32021da177e4SLinus Torvalds * Checks for sequence id mutating operations. 32031da177e4SLinus Torvalds */ 3204b37ad28bSAl Viro static __be32 3205dd453dfdSBenny Halevy nfs4_preprocess_seqid_op(struct nfsd4_compound_state *cstate, u32 seqid, 3206dd453dfdSBenny Halevy stateid_t *stateid, int flags, 3207dd453dfdSBenny Halevy struct nfs4_stateowner **sopp, 3208dd453dfdSBenny Halevy struct nfs4_stateid **stpp, struct nfsd4_lock *lock) 32091da177e4SLinus Torvalds { 32101da177e4SLinus Torvalds struct nfs4_stateid *stp; 32111da177e4SLinus Torvalds struct nfs4_stateowner *sop; 3212dd453dfdSBenny Halevy struct svc_fh *current_fh = &cstate->current_fh; 32130836f587SJ. Bruce Fields __be32 status; 32141da177e4SLinus Torvalds 32158c10cbdbSBenny Halevy dprintk("NFSD: %s: seqid=%d stateid = " STATEID_FMT "\n", __func__, 32168c10cbdbSBenny Halevy seqid, STATEID_VAL(stateid)); 32171da177e4SLinus Torvalds 32181da177e4SLinus Torvalds *stpp = NULL; 32191da177e4SLinus Torvalds *sopp = NULL; 32201da177e4SLinus Torvalds 32211da177e4SLinus Torvalds if (ZERO_STATEID(stateid) || ONE_STATEID(stateid)) { 32222fdada03SJ. Bruce Fields dprintk("NFSD: preprocess_seqid_op: magic stateid!\n"); 32233a4f98bbSNeilBrown return nfserr_bad_stateid; 32241da177e4SLinus Torvalds } 32251da177e4SLinus Torvalds 32261da177e4SLinus Torvalds if (STALE_STATEID(stateid)) 32273a4f98bbSNeilBrown return nfserr_stale_stateid; 32286668958fSAndy Adamson 32296668958fSAndy Adamson if (nfsd4_has_session(cstate)) 32306668958fSAndy Adamson flags |= HAS_SESSION; 32316668958fSAndy Adamson 32321da177e4SLinus Torvalds /* 32331da177e4SLinus Torvalds * We return BAD_STATEID if filehandle doesn't match stateid, 32341da177e4SLinus Torvalds * the confirmed flag is incorrecly set, or the generation 32351da177e4SLinus Torvalds * number is incorrect. 32361da177e4SLinus Torvalds */ 3237f8816512SNeilBrown stp = find_stateid(stateid, flags); 3238f8816512SNeilBrown if (stp == NULL) { 3239f8816512SNeilBrown /* 3240f8816512SNeilBrown * Also, we should make sure this isn't just the result of 3241f8816512SNeilBrown * a replayed close: 3242f8816512SNeilBrown */ 3243f8816512SNeilBrown sop = search_close_lru(stateid->si_stateownerid, flags); 324433515142SJ. Bruce Fields /* It's not stale; let's assume it's expired: */ 3245f8816512SNeilBrown if (sop == NULL) 324633515142SJ. Bruce Fields return nfserr_expired; 3247f8816512SNeilBrown *sopp = sop; 3248f8816512SNeilBrown goto check_replay; 3249f8816512SNeilBrown } 32501da177e4SLinus Torvalds 325139325bd0SJ. Bruce Fields *stpp = stp; 325239325bd0SJ. Bruce Fields *sopp = sop = stp->st_stateowner; 325339325bd0SJ. Bruce Fields 32544c4cd222SNeilBrown if (lock) { 32554c4cd222SNeilBrown clientid_t *lockclid = &lock->v.new.clientid; 32561da177e4SLinus Torvalds struct nfs4_client *clp = sop->so_client; 32574c4cd222SNeilBrown int lkflg = 0; 3258b37ad28bSAl Viro __be32 status; 32591da177e4SLinus Torvalds 32604c4cd222SNeilBrown lkflg = setlkflg(lock->lk_type); 32614c4cd222SNeilBrown 32624c4cd222SNeilBrown if (lock->lk_is_new) { 32631da177e4SLinus Torvalds if (!sop->so_is_open_owner) 32643a4f98bbSNeilBrown return nfserr_bad_stateid; 326560adfc50SAndy Adamson if (!(flags & HAS_SESSION) && 326660adfc50SAndy Adamson !same_clid(&clp->cl_clientid, lockclid)) 32673a4f98bbSNeilBrown return nfserr_bad_stateid; 32684c4cd222SNeilBrown /* stp is the open stateid */ 32694c4cd222SNeilBrown status = nfs4_check_openmode(stp, lkflg); 32704c4cd222SNeilBrown if (status) 32714c4cd222SNeilBrown return status; 32724c4cd222SNeilBrown } else { 32734c4cd222SNeilBrown /* stp is the lock stateid */ 32744c4cd222SNeilBrown status = nfs4_check_openmode(stp->st_openstp, lkflg); 32754c4cd222SNeilBrown if (status) 32764c4cd222SNeilBrown return status; 32774c4cd222SNeilBrown } 32781da177e4SLinus Torvalds } 32791da177e4SLinus Torvalds 3280f3362737SJ. Bruce Fields if (nfs4_check_fh(current_fh, stp)) { 32812fdada03SJ. Bruce Fields dprintk("NFSD: preprocess_seqid_op: fh-stateid mismatch!\n"); 32823a4f98bbSNeilBrown return nfserr_bad_stateid; 32831da177e4SLinus Torvalds } 32841da177e4SLinus Torvalds 32851da177e4SLinus Torvalds /* 32861da177e4SLinus Torvalds * We now validate the seqid and stateid generation numbers. 32871da177e4SLinus Torvalds * For the moment, we ignore the possibility of 32881da177e4SLinus Torvalds * generation number wraparound. 32891da177e4SLinus Torvalds */ 32906668958fSAndy Adamson if (!(flags & HAS_SESSION) && seqid != sop->so_seqid) 32911da177e4SLinus Torvalds goto check_replay; 32921da177e4SLinus Torvalds 32933a4f98bbSNeilBrown if (sop->so_confirmed && flags & CONFIRM) { 32942fdada03SJ. Bruce Fields dprintk("NFSD: preprocess_seqid_op: expected" 32953a4f98bbSNeilBrown " unconfirmed stateowner!\n"); 32963a4f98bbSNeilBrown return nfserr_bad_stateid; 32971da177e4SLinus Torvalds } 32983a4f98bbSNeilBrown if (!sop->so_confirmed && !(flags & CONFIRM)) { 32992fdada03SJ. Bruce Fields dprintk("NFSD: preprocess_seqid_op: stateowner not" 33003a4f98bbSNeilBrown " confirmed yet!\n"); 33013a4f98bbSNeilBrown return nfserr_bad_stateid; 33021da177e4SLinus Torvalds } 33036668958fSAndy Adamson status = check_stateid_generation(stateid, &stp->st_stateid, flags); 33040836f587SJ. Bruce Fields if (status) 33050836f587SJ. Bruce Fields return status; 330652fd004eSNeilBrown renew_client(sop->so_client); 33073a4f98bbSNeilBrown return nfs_ok; 33081da177e4SLinus Torvalds 33091da177e4SLinus Torvalds check_replay: 3310bd9aac52SNeilBrown if (seqid == sop->so_seqid - 1) { 3311849823c5SNeil Brown dprintk("NFSD: preprocess_seqid_op: retransmission?\n"); 33121da177e4SLinus Torvalds /* indicate replay to calling function */ 3313a90b061cSAl Viro return nfserr_replay_me; 33141da177e4SLinus Torvalds } 33152fdada03SJ. Bruce Fields dprintk("NFSD: preprocess_seqid_op: bad seqid (expected %d, got %d)\n", 33163a4f98bbSNeilBrown sop->so_seqid, seqid); 33173a4f98bbSNeilBrown *sopp = NULL; 33183a4f98bbSNeilBrown return nfserr_bad_seqid; 33191da177e4SLinus Torvalds } 33201da177e4SLinus Torvalds 3321b37ad28bSAl Viro __be32 3322ca364317SJ.Bruce Fields nfsd4_open_confirm(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, 3323a4f1706aSJ.Bruce Fields struct nfsd4_open_confirm *oc) 33241da177e4SLinus Torvalds { 3325b37ad28bSAl Viro __be32 status; 33261da177e4SLinus Torvalds struct nfs4_stateowner *sop; 33271da177e4SLinus Torvalds struct nfs4_stateid *stp; 33281da177e4SLinus Torvalds 33291da177e4SLinus Torvalds dprintk("NFSD: nfsd4_open_confirm on file %.*s\n", 3330ca364317SJ.Bruce Fields (int)cstate->current_fh.fh_dentry->d_name.len, 3331ca364317SJ.Bruce Fields cstate->current_fh.fh_dentry->d_name.name); 33321da177e4SLinus Torvalds 3333ca364317SJ.Bruce Fields status = fh_verify(rqstp, &cstate->current_fh, S_IFREG, 0); 3334a8cddc5dSJ. Bruce Fields if (status) 3335a8cddc5dSJ. Bruce Fields return status; 33361da177e4SLinus Torvalds 33371da177e4SLinus Torvalds nfs4_lock_state(); 33381da177e4SLinus Torvalds 3339dd453dfdSBenny Halevy if ((status = nfs4_preprocess_seqid_op(cstate, 3340ca364317SJ.Bruce Fields oc->oc_seqid, &oc->oc_req_stateid, 3341f3362737SJ. Bruce Fields CONFIRM | OPEN_STATE, 33421da177e4SLinus Torvalds &oc->oc_stateowner, &stp, NULL))) 33431da177e4SLinus Torvalds goto out; 33441da177e4SLinus Torvalds 33451da177e4SLinus Torvalds sop = oc->oc_stateowner; 33461da177e4SLinus Torvalds sop->so_confirmed = 1; 33471da177e4SLinus Torvalds update_stateid(&stp->st_stateid); 33481da177e4SLinus Torvalds memcpy(&oc->oc_resp_stateid, &stp->st_stateid, sizeof(stateid_t)); 33498c10cbdbSBenny Halevy dprintk("NFSD: %s: success, seqid=%d stateid=" STATEID_FMT "\n", 33508c10cbdbSBenny Halevy __func__, oc->oc_seqid, STATEID_VAL(&stp->st_stateid)); 3351c7b9a459SNeilBrown 3352c7b9a459SNeilBrown nfsd4_create_clid_dir(sop->so_client); 33531da177e4SLinus Torvalds out: 3354f2327d9aSNeil Brown if (oc->oc_stateowner) { 33551da177e4SLinus Torvalds nfs4_get_stateowner(oc->oc_stateowner); 3356a4f1706aSJ.Bruce Fields cstate->replay_owner = oc->oc_stateowner; 3357f2327d9aSNeil Brown } 33581da177e4SLinus Torvalds nfs4_unlock_state(); 33591da177e4SLinus Torvalds return status; 33601da177e4SLinus Torvalds } 33611da177e4SLinus Torvalds 33621da177e4SLinus Torvalds 33631da177e4SLinus Torvalds /* 33641da177e4SLinus Torvalds * unset all bits in union bitmap (bmap) that 33651da177e4SLinus Torvalds * do not exist in share (from successful OPEN_DOWNGRADE) 33661da177e4SLinus Torvalds */ 33671da177e4SLinus Torvalds static void 33681da177e4SLinus Torvalds reset_union_bmap_access(unsigned long access, unsigned long *bmap) 33691da177e4SLinus Torvalds { 33701da177e4SLinus Torvalds int i; 33711da177e4SLinus Torvalds for (i = 1; i < 4; i++) { 33721da177e4SLinus Torvalds if ((i & access) != i) 33731da177e4SLinus Torvalds __clear_bit(i, bmap); 33741da177e4SLinus Torvalds } 33751da177e4SLinus Torvalds } 33761da177e4SLinus Torvalds 33771da177e4SLinus Torvalds static void 33781da177e4SLinus Torvalds reset_union_bmap_deny(unsigned long deny, unsigned long *bmap) 33791da177e4SLinus Torvalds { 33801da177e4SLinus Torvalds int i; 33811da177e4SLinus Torvalds for (i = 0; i < 4; i++) { 33821da177e4SLinus Torvalds if ((i & deny) != i) 33831da177e4SLinus Torvalds __clear_bit(i, bmap); 33841da177e4SLinus Torvalds } 33851da177e4SLinus Torvalds } 33861da177e4SLinus Torvalds 3387b37ad28bSAl Viro __be32 3388ca364317SJ.Bruce Fields nfsd4_open_downgrade(struct svc_rqst *rqstp, 3389ca364317SJ.Bruce Fields struct nfsd4_compound_state *cstate, 3390a4f1706aSJ.Bruce Fields struct nfsd4_open_downgrade *od) 33911da177e4SLinus Torvalds { 3392b37ad28bSAl Viro __be32 status; 33931da177e4SLinus Torvalds struct nfs4_stateid *stp; 33941da177e4SLinus Torvalds unsigned int share_access; 33951da177e4SLinus Torvalds 33961da177e4SLinus Torvalds dprintk("NFSD: nfsd4_open_downgrade on file %.*s\n", 3397ca364317SJ.Bruce Fields (int)cstate->current_fh.fh_dentry->d_name.len, 3398ca364317SJ.Bruce Fields cstate->current_fh.fh_dentry->d_name.name); 33991da177e4SLinus Torvalds 3400d87a8adeSAndy Adamson if (!access_valid(od->od_share_access, cstate->minorversion) 3401ba5a6a19SJ. Bruce Fields || !deny_valid(od->od_share_deny)) 34021da177e4SLinus Torvalds return nfserr_inval; 34031da177e4SLinus Torvalds 34041da177e4SLinus Torvalds nfs4_lock_state(); 3405dd453dfdSBenny Halevy if ((status = nfs4_preprocess_seqid_op(cstate, 3406ca364317SJ.Bruce Fields od->od_seqid, 34071da177e4SLinus Torvalds &od->od_stateid, 3408f3362737SJ. Bruce Fields OPEN_STATE, 34091da177e4SLinus Torvalds &od->od_stateowner, &stp, NULL))) 34101da177e4SLinus Torvalds goto out; 34111da177e4SLinus Torvalds 34121da177e4SLinus Torvalds status = nfserr_inval; 34131da177e4SLinus Torvalds if (!test_bit(od->od_share_access, &stp->st_access_bmap)) { 34141da177e4SLinus Torvalds dprintk("NFSD:access not a subset current bitmap: 0x%lx, input access=%08x\n", 34151da177e4SLinus Torvalds stp->st_access_bmap, od->od_share_access); 34161da177e4SLinus Torvalds goto out; 34171da177e4SLinus Torvalds } 34181da177e4SLinus Torvalds if (!test_bit(od->od_share_deny, &stp->st_deny_bmap)) { 34191da177e4SLinus Torvalds dprintk("NFSD:deny not a subset current bitmap: 0x%lx, input deny=%08x\n", 34201da177e4SLinus Torvalds stp->st_deny_bmap, od->od_share_deny); 34211da177e4SLinus Torvalds goto out; 34221da177e4SLinus Torvalds } 34231da177e4SLinus Torvalds set_access(&share_access, stp->st_access_bmap); 3424f9d7562fSJ. Bruce Fields nfs4_file_downgrade(stp->st_file, share_access & ~od->od_share_access); 34251da177e4SLinus Torvalds 34261da177e4SLinus Torvalds reset_union_bmap_access(od->od_share_access, &stp->st_access_bmap); 34271da177e4SLinus Torvalds reset_union_bmap_deny(od->od_share_deny, &stp->st_deny_bmap); 34281da177e4SLinus Torvalds 34291da177e4SLinus Torvalds update_stateid(&stp->st_stateid); 34301da177e4SLinus Torvalds memcpy(&od->od_stateid, &stp->st_stateid, sizeof(stateid_t)); 34311da177e4SLinus Torvalds status = nfs_ok; 34321da177e4SLinus Torvalds out: 3433f2327d9aSNeil Brown if (od->od_stateowner) { 34341da177e4SLinus Torvalds nfs4_get_stateowner(od->od_stateowner); 3435a4f1706aSJ.Bruce Fields cstate->replay_owner = od->od_stateowner; 3436f2327d9aSNeil Brown } 34371da177e4SLinus Torvalds nfs4_unlock_state(); 34381da177e4SLinus Torvalds return status; 34391da177e4SLinus Torvalds } 34401da177e4SLinus Torvalds 34411da177e4SLinus Torvalds /* 34421da177e4SLinus Torvalds * nfs4_unlock_state() called after encode 34431da177e4SLinus Torvalds */ 3444b37ad28bSAl Viro __be32 3445ca364317SJ.Bruce Fields nfsd4_close(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, 3446a4f1706aSJ.Bruce Fields struct nfsd4_close *close) 34471da177e4SLinus Torvalds { 3448b37ad28bSAl Viro __be32 status; 34491da177e4SLinus Torvalds struct nfs4_stateid *stp; 34501da177e4SLinus Torvalds 34511da177e4SLinus Torvalds dprintk("NFSD: nfsd4_close on file %.*s\n", 3452ca364317SJ.Bruce Fields (int)cstate->current_fh.fh_dentry->d_name.len, 3453ca364317SJ.Bruce Fields cstate->current_fh.fh_dentry->d_name.name); 34541da177e4SLinus Torvalds 34551da177e4SLinus Torvalds nfs4_lock_state(); 34561da177e4SLinus Torvalds /* check close_lru for replay */ 3457dd453dfdSBenny Halevy if ((status = nfs4_preprocess_seqid_op(cstate, 3458ca364317SJ.Bruce Fields close->cl_seqid, 34591da177e4SLinus Torvalds &close->cl_stateid, 3460f3362737SJ. Bruce Fields OPEN_STATE | CLOSE_STATE, 34611da177e4SLinus Torvalds &close->cl_stateowner, &stp, NULL))) 34621da177e4SLinus Torvalds goto out; 34631da177e4SLinus Torvalds status = nfs_ok; 34641da177e4SLinus Torvalds update_stateid(&stp->st_stateid); 34651da177e4SLinus Torvalds memcpy(&close->cl_stateid, &stp->st_stateid, sizeof(stateid_t)); 34661da177e4SLinus Torvalds 346704ef5954SJ. Bruce Fields /* release_stateid() calls nfsd_close() if needed */ 34682283963fSJ. Bruce Fields release_open_stateid(stp); 346904ef5954SJ. Bruce Fields 347004ef5954SJ. Bruce Fields /* place unused nfs4_stateowners on so_close_lru list to be 347104ef5954SJ. Bruce Fields * released by the laundromat service after the lease period 347204ef5954SJ. Bruce Fields * to enable us to handle CLOSE replay 347304ef5954SJ. Bruce Fields */ 347404ef5954SJ. Bruce Fields if (list_empty(&close->cl_stateowner->so_stateids)) 347504ef5954SJ. Bruce Fields move_to_close_lru(close->cl_stateowner); 34761da177e4SLinus Torvalds out: 3477f2327d9aSNeil Brown if (close->cl_stateowner) { 34781da177e4SLinus Torvalds nfs4_get_stateowner(close->cl_stateowner); 3479a4f1706aSJ.Bruce Fields cstate->replay_owner = close->cl_stateowner; 3480f2327d9aSNeil Brown } 34811da177e4SLinus Torvalds nfs4_unlock_state(); 34821da177e4SLinus Torvalds return status; 34831da177e4SLinus Torvalds } 34841da177e4SLinus Torvalds 3485b37ad28bSAl Viro __be32 3486ca364317SJ.Bruce Fields nfsd4_delegreturn(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, 3487ca364317SJ.Bruce Fields struct nfsd4_delegreturn *dr) 34881da177e4SLinus Torvalds { 3489203a8c8eSJ. Bruce Fields struct nfs4_delegation *dp; 3490203a8c8eSJ. Bruce Fields stateid_t *stateid = &dr->dr_stateid; 3491203a8c8eSJ. Bruce Fields struct inode *inode; 3492b37ad28bSAl Viro __be32 status; 34936668958fSAndy Adamson int flags = 0; 34941da177e4SLinus Torvalds 3495ca364317SJ.Bruce Fields if ((status = fh_verify(rqstp, &cstate->current_fh, S_IFREG, 0))) 3496203a8c8eSJ. Bruce Fields return status; 3497203a8c8eSJ. Bruce Fields inode = cstate->current_fh.fh_dentry->d_inode; 34981da177e4SLinus Torvalds 34996668958fSAndy Adamson if (nfsd4_has_session(cstate)) 35006668958fSAndy Adamson flags |= HAS_SESSION; 35011da177e4SLinus Torvalds nfs4_lock_state(); 3502203a8c8eSJ. Bruce Fields status = nfserr_bad_stateid; 3503203a8c8eSJ. Bruce Fields if (ZERO_STATEID(stateid) || ONE_STATEID(stateid)) 3504203a8c8eSJ. Bruce Fields goto out; 3505203a8c8eSJ. Bruce Fields status = nfserr_stale_stateid; 3506203a8c8eSJ. Bruce Fields if (STALE_STATEID(stateid)) 3507203a8c8eSJ. Bruce Fields goto out; 35087e0f7cf5SJ. Bruce Fields status = nfserr_bad_stateid; 3509203a8c8eSJ. Bruce Fields if (!is_delegation_stateid(stateid)) 3510203a8c8eSJ. Bruce Fields goto out; 351133515142SJ. Bruce Fields status = nfserr_expired; 3512203a8c8eSJ. Bruce Fields dp = find_delegation_stateid(inode, stateid); 3513e4e83ea4SJ. Bruce Fields if (!dp) 3514203a8c8eSJ. Bruce Fields goto out; 35156668958fSAndy Adamson status = check_stateid_generation(stateid, &dp->dl_stateid, flags); 3516203a8c8eSJ. Bruce Fields if (status) 3517203a8c8eSJ. Bruce Fields goto out; 3518203a8c8eSJ. Bruce Fields renew_client(dp->dl_client); 3519203a8c8eSJ. Bruce Fields 3520203a8c8eSJ. Bruce Fields unhash_delegation(dp); 35211da177e4SLinus Torvalds out: 3522203a8c8eSJ. Bruce Fields nfs4_unlock_state(); 3523203a8c8eSJ. Bruce Fields 35241da177e4SLinus Torvalds return status; 35251da177e4SLinus Torvalds } 35261da177e4SLinus Torvalds 35271da177e4SLinus Torvalds 35281da177e4SLinus Torvalds /* 35291da177e4SLinus Torvalds * Lock owner state (byte-range locks) 35301da177e4SLinus Torvalds */ 35311da177e4SLinus Torvalds #define LOFF_OVERFLOW(start, len) ((u64)(len) > ~(u64)(start)) 35321da177e4SLinus Torvalds #define LOCK_HASH_BITS 8 35331da177e4SLinus Torvalds #define LOCK_HASH_SIZE (1 << LOCK_HASH_BITS) 35341da177e4SLinus Torvalds #define LOCK_HASH_MASK (LOCK_HASH_SIZE - 1) 35351da177e4SLinus Torvalds 353687df4de8SBenny Halevy static inline u64 353787df4de8SBenny Halevy end_offset(u64 start, u64 len) 353887df4de8SBenny Halevy { 353987df4de8SBenny Halevy u64 end; 354087df4de8SBenny Halevy 354187df4de8SBenny Halevy end = start + len; 354287df4de8SBenny Halevy return end >= start ? end: NFS4_MAX_UINT64; 354387df4de8SBenny Halevy } 354487df4de8SBenny Halevy 354587df4de8SBenny Halevy /* last octet in a range */ 354687df4de8SBenny Halevy static inline u64 354787df4de8SBenny Halevy last_byte_offset(u64 start, u64 len) 354887df4de8SBenny Halevy { 354987df4de8SBenny Halevy u64 end; 355087df4de8SBenny Halevy 355187df4de8SBenny Halevy BUG_ON(!len); 355287df4de8SBenny Halevy end = start + len; 355387df4de8SBenny Halevy return end > start ? end - 1: NFS4_MAX_UINT64; 355487df4de8SBenny Halevy } 355587df4de8SBenny Halevy 35561da177e4SLinus Torvalds #define lockownerid_hashval(id) \ 35571da177e4SLinus Torvalds ((id) & LOCK_HASH_MASK) 35581da177e4SLinus Torvalds 35591da177e4SLinus Torvalds static inline unsigned int 35601da177e4SLinus Torvalds lock_ownerstr_hashval(struct inode *inode, u32 cl_id, 35611da177e4SLinus Torvalds struct xdr_netobj *ownername) 35621da177e4SLinus Torvalds { 35631da177e4SLinus Torvalds return (file_hashval(inode) + cl_id 35641da177e4SLinus Torvalds + opaque_hashval(ownername->data, ownername->len)) 35651da177e4SLinus Torvalds & LOCK_HASH_MASK; 35661da177e4SLinus Torvalds } 35671da177e4SLinus Torvalds 35681da177e4SLinus Torvalds static struct list_head lock_ownerid_hashtbl[LOCK_HASH_SIZE]; 35691da177e4SLinus Torvalds static struct list_head lock_ownerstr_hashtbl[LOCK_HASH_SIZE]; 35701da177e4SLinus Torvalds static struct list_head lockstateid_hashtbl[STATEID_HASH_SIZE]; 35711da177e4SLinus Torvalds 3572fd39ca9aSNeilBrown static struct nfs4_stateid * 35731da177e4SLinus Torvalds find_stateid(stateid_t *stid, int flags) 35741da177e4SLinus Torvalds { 35759346eff0SKrishna Kumar struct nfs4_stateid *local; 35761da177e4SLinus Torvalds u32 st_id = stid->si_stateownerid; 35771da177e4SLinus Torvalds u32 f_id = stid->si_fileid; 35781da177e4SLinus Torvalds unsigned int hashval; 35791da177e4SLinus Torvalds 35801da177e4SLinus Torvalds dprintk("NFSD: find_stateid flags 0x%x\n",flags); 35819346eff0SKrishna Kumar if (flags & (LOCK_STATE | RD_STATE | WR_STATE)) { 35821da177e4SLinus Torvalds hashval = stateid_hashval(st_id, f_id); 35831da177e4SLinus Torvalds list_for_each_entry(local, &lockstateid_hashtbl[hashval], st_hash) { 35841da177e4SLinus Torvalds if ((local->st_stateid.si_stateownerid == st_id) && 35851da177e4SLinus Torvalds (local->st_stateid.si_fileid == f_id)) 35861da177e4SLinus Torvalds return local; 35871da177e4SLinus Torvalds } 35881da177e4SLinus Torvalds } 35899346eff0SKrishna Kumar 35909346eff0SKrishna Kumar if (flags & (OPEN_STATE | RD_STATE | WR_STATE)) { 35911da177e4SLinus Torvalds hashval = stateid_hashval(st_id, f_id); 35921da177e4SLinus Torvalds list_for_each_entry(local, &stateid_hashtbl[hashval], st_hash) { 35931da177e4SLinus Torvalds if ((local->st_stateid.si_stateownerid == st_id) && 35941da177e4SLinus Torvalds (local->st_stateid.si_fileid == f_id)) 35951da177e4SLinus Torvalds return local; 35961da177e4SLinus Torvalds } 3597849823c5SNeil Brown } 35981da177e4SLinus Torvalds return NULL; 35991da177e4SLinus Torvalds } 36001da177e4SLinus Torvalds 36011da177e4SLinus Torvalds static struct nfs4_delegation * 36021da177e4SLinus Torvalds find_delegation_stateid(struct inode *ino, stateid_t *stid) 36031da177e4SLinus Torvalds { 360413cd2184SNeilBrown struct nfs4_file *fp; 360513cd2184SNeilBrown struct nfs4_delegation *dl; 36061da177e4SLinus Torvalds 36078c10cbdbSBenny Halevy dprintk("NFSD: %s: stateid=" STATEID_FMT "\n", __func__, 36088c10cbdbSBenny Halevy STATEID_VAL(stid)); 36091da177e4SLinus Torvalds 36101da177e4SLinus Torvalds fp = find_file(ino); 361113cd2184SNeilBrown if (!fp) 36121da177e4SLinus Torvalds return NULL; 361313cd2184SNeilBrown dl = find_delegation_file(fp, stid); 361413cd2184SNeilBrown put_nfs4_file(fp); 361513cd2184SNeilBrown return dl; 36161da177e4SLinus Torvalds } 36171da177e4SLinus Torvalds 36181da177e4SLinus Torvalds /* 36191da177e4SLinus Torvalds * TODO: Linux file offsets are _signed_ 64-bit quantities, which means that 36201da177e4SLinus Torvalds * we can't properly handle lock requests that go beyond the (2^63 - 1)-th 36211da177e4SLinus Torvalds * byte, because of sign extension problems. Since NFSv4 calls for 64-bit 36221da177e4SLinus Torvalds * locking, this prevents us from being completely protocol-compliant. The 36231da177e4SLinus Torvalds * real solution to this problem is to start using unsigned file offsets in 36241da177e4SLinus Torvalds * the VFS, but this is a very deep change! 36251da177e4SLinus Torvalds */ 36261da177e4SLinus Torvalds static inline void 36271da177e4SLinus Torvalds nfs4_transform_lock_offset(struct file_lock *lock) 36281da177e4SLinus Torvalds { 36291da177e4SLinus Torvalds if (lock->fl_start < 0) 36301da177e4SLinus Torvalds lock->fl_start = OFFSET_MAX; 36311da177e4SLinus Torvalds if (lock->fl_end < 0) 36321da177e4SLinus Torvalds lock->fl_end = OFFSET_MAX; 36331da177e4SLinus Torvalds } 36341da177e4SLinus Torvalds 3635d5b9026aSNeilBrown /* Hack!: For now, we're defining this just so we can use a pointer to it 3636d5b9026aSNeilBrown * as a unique cookie to identify our (NFSv4's) posix locks. */ 36377b021967SAlexey Dobriyan static const struct lock_manager_operations nfsd_posix_mng_ops = { 3638d5b9026aSNeilBrown }; 36391da177e4SLinus Torvalds 36401da177e4SLinus Torvalds static inline void 36411da177e4SLinus Torvalds nfs4_set_lock_denied(struct file_lock *fl, struct nfsd4_lock_denied *deny) 36421da177e4SLinus Torvalds { 3643d5b9026aSNeilBrown struct nfs4_stateowner *sop; 36441da177e4SLinus Torvalds 3645d5b9026aSNeilBrown if (fl->fl_lmops == &nfsd_posix_mng_ops) { 3646d5b9026aSNeilBrown sop = (struct nfs4_stateowner *) fl->fl_owner; 36471da177e4SLinus Torvalds kref_get(&sop->so_ref); 36481da177e4SLinus Torvalds deny->ld_sop = sop; 36491da177e4SLinus Torvalds deny->ld_clientid = sop->so_client->cl_clientid; 3650d5b9026aSNeilBrown } else { 3651d5b9026aSNeilBrown deny->ld_sop = NULL; 3652d5b9026aSNeilBrown deny->ld_clientid.cl_boot = 0; 3653d5b9026aSNeilBrown deny->ld_clientid.cl_id = 0; 36541da177e4SLinus Torvalds } 36551da177e4SLinus Torvalds deny->ld_start = fl->fl_start; 365687df4de8SBenny Halevy deny->ld_length = NFS4_MAX_UINT64; 365787df4de8SBenny Halevy if (fl->fl_end != NFS4_MAX_UINT64) 36581da177e4SLinus Torvalds deny->ld_length = fl->fl_end - fl->fl_start + 1; 36591da177e4SLinus Torvalds deny->ld_type = NFS4_READ_LT; 36601da177e4SLinus Torvalds if (fl->fl_type != F_RDLCK) 36611da177e4SLinus Torvalds deny->ld_type = NFS4_WRITE_LT; 36621da177e4SLinus Torvalds } 36631da177e4SLinus Torvalds 36641da177e4SLinus Torvalds static struct nfs4_stateowner * 36651da177e4SLinus Torvalds find_lockstateowner_str(struct inode *inode, clientid_t *clid, 36661da177e4SLinus Torvalds struct xdr_netobj *owner) 36671da177e4SLinus Torvalds { 36681da177e4SLinus Torvalds unsigned int hashval = lock_ownerstr_hashval(inode, clid->cl_id, owner); 36691da177e4SLinus Torvalds struct nfs4_stateowner *op; 36701da177e4SLinus Torvalds 36711da177e4SLinus Torvalds list_for_each_entry(op, &lock_ownerstr_hashtbl[hashval], so_strhash) { 3672599e0a22SJ. Bruce Fields if (same_owner_str(op, owner, clid)) 36731da177e4SLinus Torvalds return op; 36741da177e4SLinus Torvalds } 36751da177e4SLinus Torvalds return NULL; 36761da177e4SLinus Torvalds } 36771da177e4SLinus Torvalds 36781da177e4SLinus Torvalds /* 36791da177e4SLinus Torvalds * Alloc a lock owner structure. 36801da177e4SLinus Torvalds * Called in nfsd4_lock - therefore, OPEN and OPEN_CONFIRM (if needed) has 36811da177e4SLinus Torvalds * occured. 36821da177e4SLinus Torvalds * 36831da177e4SLinus Torvalds * strhashval = lock_ownerstr_hashval 36841da177e4SLinus Torvalds */ 36851da177e4SLinus Torvalds 36861da177e4SLinus Torvalds static struct nfs4_stateowner * 36871da177e4SLinus Torvalds alloc_init_lock_stateowner(unsigned int strhashval, struct nfs4_client *clp, struct nfs4_stateid *open_stp, struct nfsd4_lock *lock) { 36881da177e4SLinus Torvalds struct nfs4_stateowner *sop; 36891da177e4SLinus Torvalds struct nfs4_replay *rp; 36901da177e4SLinus Torvalds unsigned int idhashval; 36911da177e4SLinus Torvalds 36921da177e4SLinus Torvalds if (!(sop = alloc_stateowner(&lock->lk_new_owner))) 36931da177e4SLinus Torvalds return NULL; 36941da177e4SLinus Torvalds idhashval = lockownerid_hashval(current_ownerid); 36951da177e4SLinus Torvalds INIT_LIST_HEAD(&sop->so_idhash); 36961da177e4SLinus Torvalds INIT_LIST_HEAD(&sop->so_strhash); 36971da177e4SLinus Torvalds INIT_LIST_HEAD(&sop->so_perclient); 3698ea1da636SNeilBrown INIT_LIST_HEAD(&sop->so_stateids); 3699ea1da636SNeilBrown INIT_LIST_HEAD(&sop->so_perstateid); 37001da177e4SLinus Torvalds INIT_LIST_HEAD(&sop->so_close_lru); /* not used */ 37011da177e4SLinus Torvalds sop->so_time = 0; 37021da177e4SLinus Torvalds list_add(&sop->so_idhash, &lock_ownerid_hashtbl[idhashval]); 37031da177e4SLinus Torvalds list_add(&sop->so_strhash, &lock_ownerstr_hashtbl[strhashval]); 3704ea1da636SNeilBrown list_add(&sop->so_perstateid, &open_stp->st_lockowners); 37051da177e4SLinus Torvalds sop->so_is_open_owner = 0; 37061da177e4SLinus Torvalds sop->so_id = current_ownerid++; 37071da177e4SLinus Torvalds sop->so_client = clp; 3708b59e3c0eSNeil Brown /* It is the openowner seqid that will be incremented in encode in the 3709b59e3c0eSNeil Brown * case of new lockowners; so increment the lock seqid manually: */ 3710b59e3c0eSNeil Brown sop->so_seqid = lock->lk_new_lock_seqid + 1; 37111da177e4SLinus Torvalds sop->so_confirmed = 1; 37121da177e4SLinus Torvalds rp = &sop->so_replay; 3713de1ae286SAl Viro rp->rp_status = nfserr_serverfault; 37141da177e4SLinus Torvalds rp->rp_buflen = 0; 37151da177e4SLinus Torvalds rp->rp_buf = rp->rp_ibuf; 37161da177e4SLinus Torvalds return sop; 37171da177e4SLinus Torvalds } 37181da177e4SLinus Torvalds 3719fd39ca9aSNeilBrown static struct nfs4_stateid * 37201da177e4SLinus Torvalds alloc_init_lock_stateid(struct nfs4_stateowner *sop, struct nfs4_file *fp, struct nfs4_stateid *open_stp) 37211da177e4SLinus Torvalds { 37221da177e4SLinus Torvalds struct nfs4_stateid *stp; 37231da177e4SLinus Torvalds unsigned int hashval = stateid_hashval(sop->so_id, fp->fi_id); 37241da177e4SLinus Torvalds 37255ac049acSNeilBrown stp = nfs4_alloc_stateid(); 37265ac049acSNeilBrown if (stp == NULL) 37271da177e4SLinus Torvalds goto out; 37281da177e4SLinus Torvalds INIT_LIST_HEAD(&stp->st_hash); 37291da177e4SLinus Torvalds INIT_LIST_HEAD(&stp->st_perfile); 3730ea1da636SNeilBrown INIT_LIST_HEAD(&stp->st_perstateowner); 3731ea1da636SNeilBrown INIT_LIST_HEAD(&stp->st_lockowners); /* not used */ 37321da177e4SLinus Torvalds list_add(&stp->st_hash, &lockstateid_hashtbl[hashval]); 37338beefa24SNeilBrown list_add(&stp->st_perfile, &fp->fi_stateids); 3734ea1da636SNeilBrown list_add(&stp->st_perstateowner, &sop->so_stateids); 37351da177e4SLinus Torvalds stp->st_stateowner = sop; 373613cd2184SNeilBrown get_nfs4_file(fp); 37371da177e4SLinus Torvalds stp->st_file = fp; 3738e4e83ea4SJ. Bruce Fields stp->st_stateid.si_boot = boot_time; 37391da177e4SLinus Torvalds stp->st_stateid.si_stateownerid = sop->so_id; 37401da177e4SLinus Torvalds stp->st_stateid.si_fileid = fp->fi_id; 37411da177e4SLinus Torvalds stp->st_stateid.si_generation = 0; 37420997b173SJ. Bruce Fields stp->st_access_bmap = 0; 37431da177e4SLinus Torvalds stp->st_deny_bmap = open_stp->st_deny_bmap; 37444c4cd222SNeilBrown stp->st_openstp = open_stp; 37451da177e4SLinus Torvalds 37461da177e4SLinus Torvalds out: 37471da177e4SLinus Torvalds return stp; 37481da177e4SLinus Torvalds } 37491da177e4SLinus Torvalds 3750fd39ca9aSNeilBrown static int 37511da177e4SLinus Torvalds check_lock_length(u64 offset, u64 length) 37521da177e4SLinus Torvalds { 375387df4de8SBenny Halevy return ((length == 0) || ((length != NFS4_MAX_UINT64) && 37541da177e4SLinus Torvalds LOFF_OVERFLOW(offset, length))); 37551da177e4SLinus Torvalds } 37561da177e4SLinus Torvalds 37570997b173SJ. Bruce Fields static void get_lock_access(struct nfs4_stateid *lock_stp, u32 access) 37580997b173SJ. Bruce Fields { 37590997b173SJ. Bruce Fields struct nfs4_file *fp = lock_stp->st_file; 37600997b173SJ. Bruce Fields int oflag = nfs4_access_to_omode(access); 37610997b173SJ. Bruce Fields 37620997b173SJ. Bruce Fields if (test_bit(access, &lock_stp->st_access_bmap)) 37630997b173SJ. Bruce Fields return; 37640997b173SJ. Bruce Fields nfs4_file_get_access(fp, oflag); 37650997b173SJ. Bruce Fields __set_bit(access, &lock_stp->st_access_bmap); 37660997b173SJ. Bruce Fields } 37670997b173SJ. Bruce Fields 37681da177e4SLinus Torvalds /* 37691da177e4SLinus Torvalds * LOCK operation 37701da177e4SLinus Torvalds */ 3771b37ad28bSAl Viro __be32 3772ca364317SJ.Bruce Fields nfsd4_lock(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, 3773a4f1706aSJ.Bruce Fields struct nfsd4_lock *lock) 37741da177e4SLinus Torvalds { 37753e9e3dbeSNeilBrown struct nfs4_stateowner *open_sop = NULL; 3776b59e3c0eSNeil Brown struct nfs4_stateowner *lock_sop = NULL; 37771da177e4SLinus Torvalds struct nfs4_stateid *lock_stp; 37787d947842SJ. Bruce Fields struct nfs4_file *fp; 37797d947842SJ. Bruce Fields struct file *filp = NULL; 37801da177e4SLinus Torvalds struct file_lock file_lock; 37818dc7c311SAndy Adamson struct file_lock conflock; 3782b37ad28bSAl Viro __be32 status = 0; 37831da177e4SLinus Torvalds unsigned int strhashval; 3784b8dd7b9aSAl Viro int err; 37851da177e4SLinus Torvalds 37861da177e4SLinus Torvalds dprintk("NFSD: nfsd4_lock: start=%Ld length=%Ld\n", 37871da177e4SLinus Torvalds (long long) lock->lk_offset, 37881da177e4SLinus Torvalds (long long) lock->lk_length); 37891da177e4SLinus Torvalds 37901da177e4SLinus Torvalds if (check_lock_length(lock->lk_offset, lock->lk_length)) 37911da177e4SLinus Torvalds return nfserr_inval; 37921da177e4SLinus Torvalds 3793ca364317SJ.Bruce Fields if ((status = fh_verify(rqstp, &cstate->current_fh, 37948837abcaSMiklos Szeredi S_IFREG, NFSD_MAY_LOCK))) { 3795a6f6ef2fSAndy Adamson dprintk("NFSD: nfsd4_lock: permission denied!\n"); 3796a6f6ef2fSAndy Adamson return status; 3797a6f6ef2fSAndy Adamson } 3798a6f6ef2fSAndy Adamson 37991da177e4SLinus Torvalds nfs4_lock_state(); 38001da177e4SLinus Torvalds 38011da177e4SLinus Torvalds if (lock->lk_is_new) { 38021da177e4SLinus Torvalds /* 38031da177e4SLinus Torvalds * Client indicates that this is a new lockowner. 3804893f8770SNeilBrown * Use open owner and open stateid to create lock owner and 3805893f8770SNeilBrown * lock stateid. 38061da177e4SLinus Torvalds */ 38071da177e4SLinus Torvalds struct nfs4_stateid *open_stp = NULL; 38081da177e4SLinus Torvalds 38091da177e4SLinus Torvalds status = nfserr_stale_clientid; 381060adfc50SAndy Adamson if (!nfsd4_has_session(cstate) && 381160adfc50SAndy Adamson STALE_CLIENTID(&lock->lk_new_clientid)) 38121da177e4SLinus Torvalds goto out; 38131da177e4SLinus Torvalds 38141da177e4SLinus Torvalds /* validate and update open stateid and open seqid */ 3815dd453dfdSBenny Halevy status = nfs4_preprocess_seqid_op(cstate, 38161da177e4SLinus Torvalds lock->lk_new_open_seqid, 38171da177e4SLinus Torvalds &lock->lk_new_open_stateid, 3818f3362737SJ. Bruce Fields OPEN_STATE, 38193a65588aSJ. Bruce Fields &lock->lk_replay_owner, &open_stp, 3820b59e3c0eSNeil Brown lock); 382137515177SNeilBrown if (status) 38221da177e4SLinus Torvalds goto out; 38233a65588aSJ. Bruce Fields open_sop = lock->lk_replay_owner; 38241da177e4SLinus Torvalds /* create lockowner and lock stateid */ 38251da177e4SLinus Torvalds fp = open_stp->st_file; 38261da177e4SLinus Torvalds strhashval = lock_ownerstr_hashval(fp->fi_inode, 38271da177e4SLinus Torvalds open_sop->so_client->cl_clientid.cl_id, 38281da177e4SLinus Torvalds &lock->v.new.owner); 38293e9e3dbeSNeilBrown /* XXX: Do we need to check for duplicate stateowners on 38303e9e3dbeSNeilBrown * the same file, or should they just be allowed (and 38313e9e3dbeSNeilBrown * create new stateids)? */ 38321da177e4SLinus Torvalds status = nfserr_resource; 3833b59e3c0eSNeil Brown lock_sop = alloc_init_lock_stateowner(strhashval, 3834b59e3c0eSNeil Brown open_sop->so_client, open_stp, lock); 3835b59e3c0eSNeil Brown if (lock_sop == NULL) 38361da177e4SLinus Torvalds goto out; 3837b59e3c0eSNeil Brown lock_stp = alloc_init_lock_stateid(lock_sop, fp, open_stp); 38388a280510SJ. Bruce Fields if (lock_stp == NULL) 38391da177e4SLinus Torvalds goto out; 38401da177e4SLinus Torvalds } else { 38411da177e4SLinus Torvalds /* lock (lock owner + lock stateid) already exists */ 3842dd453dfdSBenny Halevy status = nfs4_preprocess_seqid_op(cstate, 38431da177e4SLinus Torvalds lock->lk_old_lock_seqid, 38441da177e4SLinus Torvalds &lock->lk_old_lock_stateid, 3845f3362737SJ. Bruce Fields LOCK_STATE, 38463a65588aSJ. Bruce Fields &lock->lk_replay_owner, &lock_stp, lock); 38471da177e4SLinus Torvalds if (status) 38481da177e4SLinus Torvalds goto out; 38493a65588aSJ. Bruce Fields lock_sop = lock->lk_replay_owner; 38507d947842SJ. Bruce Fields fp = lock_stp->st_file; 38511da177e4SLinus Torvalds } 38523a65588aSJ. Bruce Fields /* lock->lk_replay_owner and lock_stp have been created or found */ 38531da177e4SLinus Torvalds 38540dd395dcSNeilBrown status = nfserr_grace; 3855af558e33SJ. Bruce Fields if (locks_in_grace() && !lock->lk_reclaim) 38560dd395dcSNeilBrown goto out; 38570dd395dcSNeilBrown status = nfserr_no_grace; 3858af558e33SJ. Bruce Fields if (!locks_in_grace() && lock->lk_reclaim) 38590dd395dcSNeilBrown goto out; 38600dd395dcSNeilBrown 38611da177e4SLinus Torvalds locks_init_lock(&file_lock); 38621da177e4SLinus Torvalds switch (lock->lk_type) { 38631da177e4SLinus Torvalds case NFS4_READ_LT: 38641da177e4SLinus Torvalds case NFS4_READW_LT: 3865f9d7562fSJ. Bruce Fields filp = find_readable_file(lock_stp->st_file); 38660997b173SJ. Bruce Fields if (filp) 38670997b173SJ. Bruce Fields get_lock_access(lock_stp, NFS4_SHARE_ACCESS_READ); 38681da177e4SLinus Torvalds file_lock.fl_type = F_RDLCK; 38691da177e4SLinus Torvalds break; 38701da177e4SLinus Torvalds case NFS4_WRITE_LT: 38711da177e4SLinus Torvalds case NFS4_WRITEW_LT: 3872f9d7562fSJ. Bruce Fields filp = find_writeable_file(lock_stp->st_file); 38730997b173SJ. Bruce Fields if (filp) 38740997b173SJ. Bruce Fields get_lock_access(lock_stp, NFS4_SHARE_ACCESS_WRITE); 38751da177e4SLinus Torvalds file_lock.fl_type = F_WRLCK; 38761da177e4SLinus Torvalds break; 38771da177e4SLinus Torvalds default: 38781da177e4SLinus Torvalds status = nfserr_inval; 38791da177e4SLinus Torvalds goto out; 38801da177e4SLinus Torvalds } 3881f9d7562fSJ. Bruce Fields if (!filp) { 3882f9d7562fSJ. Bruce Fields status = nfserr_openmode; 3883f9d7562fSJ. Bruce Fields goto out; 3884f9d7562fSJ. Bruce Fields } 3885b59e3c0eSNeil Brown file_lock.fl_owner = (fl_owner_t)lock_sop; 38861da177e4SLinus Torvalds file_lock.fl_pid = current->tgid; 38871da177e4SLinus Torvalds file_lock.fl_file = filp; 38881da177e4SLinus Torvalds file_lock.fl_flags = FL_POSIX; 3889d5b9026aSNeilBrown file_lock.fl_lmops = &nfsd_posix_mng_ops; 38901da177e4SLinus Torvalds 38911da177e4SLinus Torvalds file_lock.fl_start = lock->lk_offset; 389287df4de8SBenny Halevy file_lock.fl_end = last_byte_offset(lock->lk_offset, lock->lk_length); 38931da177e4SLinus Torvalds nfs4_transform_lock_offset(&file_lock); 38941da177e4SLinus Torvalds 38951da177e4SLinus Torvalds /* 38961da177e4SLinus Torvalds * Try to lock the file in the VFS. 38971da177e4SLinus Torvalds * Note: locks.c uses the BKL to protect the inode's lock list. 38981da177e4SLinus Torvalds */ 38991da177e4SLinus Torvalds 3900529d7b2aSJ. Bruce Fields err = vfs_lock_file(filp, F_SETLK, &file_lock, &conflock); 3901b8dd7b9aSAl Viro switch (-err) { 39021da177e4SLinus Torvalds case 0: /* success! */ 39031da177e4SLinus Torvalds update_stateid(&lock_stp->st_stateid); 39041da177e4SLinus Torvalds memcpy(&lock->lk_resp_stateid, &lock_stp->st_stateid, 39051da177e4SLinus Torvalds sizeof(stateid_t)); 3906b8dd7b9aSAl Viro status = 0; 3907eb76b3fdSAndy Adamson break; 3908eb76b3fdSAndy Adamson case (EAGAIN): /* conflock holds conflicting lock */ 3909eb76b3fdSAndy Adamson status = nfserr_denied; 3910eb76b3fdSAndy Adamson dprintk("NFSD: nfsd4_lock: conflicting lock found!\n"); 3911eb76b3fdSAndy Adamson nfs4_set_lock_denied(&conflock, &lock->lk_denied); 3912eb76b3fdSAndy Adamson break; 39131da177e4SLinus Torvalds case (EDEADLK): 39141da177e4SLinus Torvalds status = nfserr_deadlock; 3915eb76b3fdSAndy Adamson break; 39161da177e4SLinus Torvalds default: 3917fd85b817SMarc Eshel dprintk("NFSD: nfsd4_lock: vfs_lock_file() failed! status %d\n",err); 3918eb76b3fdSAndy Adamson status = nfserr_resource; 3919eb76b3fdSAndy Adamson break; 39201da177e4SLinus Torvalds } 39211da177e4SLinus Torvalds out: 39228a280510SJ. Bruce Fields if (status && lock->lk_is_new && lock_sop) 3923f044ff83SJ. Bruce Fields release_lockowner(lock_sop); 39243a65588aSJ. Bruce Fields if (lock->lk_replay_owner) { 39253a65588aSJ. Bruce Fields nfs4_get_stateowner(lock->lk_replay_owner); 3926a4f1706aSJ.Bruce Fields cstate->replay_owner = lock->lk_replay_owner; 3927f2327d9aSNeil Brown } 39281da177e4SLinus Torvalds nfs4_unlock_state(); 39291da177e4SLinus Torvalds return status; 39301da177e4SLinus Torvalds } 39311da177e4SLinus Torvalds 39321da177e4SLinus Torvalds /* 393355ef1274SJ. Bruce Fields * The NFSv4 spec allows a client to do a LOCKT without holding an OPEN, 393455ef1274SJ. Bruce Fields * so we do a temporary open here just to get an open file to pass to 393555ef1274SJ. Bruce Fields * vfs_test_lock. (Arguably perhaps test_lock should be done with an 393655ef1274SJ. Bruce Fields * inode operation.) 393755ef1274SJ. Bruce Fields */ 393855ef1274SJ. Bruce Fields static int nfsd_test_lock(struct svc_rqst *rqstp, struct svc_fh *fhp, struct file_lock *lock) 393955ef1274SJ. Bruce Fields { 394055ef1274SJ. Bruce Fields struct file *file; 394155ef1274SJ. Bruce Fields int err; 394255ef1274SJ. Bruce Fields 394355ef1274SJ. Bruce Fields err = nfsd_open(rqstp, fhp, S_IFREG, NFSD_MAY_READ, &file); 394455ef1274SJ. Bruce Fields if (err) 394555ef1274SJ. Bruce Fields return err; 394655ef1274SJ. Bruce Fields err = vfs_test_lock(file, lock); 394755ef1274SJ. Bruce Fields nfsd_close(file); 394855ef1274SJ. Bruce Fields return err; 394955ef1274SJ. Bruce Fields } 395055ef1274SJ. Bruce Fields 395155ef1274SJ. Bruce Fields /* 39521da177e4SLinus Torvalds * LOCKT operation 39531da177e4SLinus Torvalds */ 3954b37ad28bSAl Viro __be32 3955ca364317SJ.Bruce Fields nfsd4_lockt(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, 3956ca364317SJ.Bruce Fields struct nfsd4_lockt *lockt) 39571da177e4SLinus Torvalds { 39581da177e4SLinus Torvalds struct inode *inode; 39591da177e4SLinus Torvalds struct file_lock file_lock; 3960fd85b817SMarc Eshel int error; 3961b37ad28bSAl Viro __be32 status; 39621da177e4SLinus Torvalds 3963af558e33SJ. Bruce Fields if (locks_in_grace()) 39641da177e4SLinus Torvalds return nfserr_grace; 39651da177e4SLinus Torvalds 39661da177e4SLinus Torvalds if (check_lock_length(lockt->lt_offset, lockt->lt_length)) 39671da177e4SLinus Torvalds return nfserr_inval; 39681da177e4SLinus Torvalds 39691da177e4SLinus Torvalds lockt->lt_stateowner = NULL; 39701da177e4SLinus Torvalds nfs4_lock_state(); 39711da177e4SLinus Torvalds 39721da177e4SLinus Torvalds status = nfserr_stale_clientid; 397360adfc50SAndy Adamson if (!nfsd4_has_session(cstate) && STALE_CLIENTID(&lockt->lt_clientid)) 39741da177e4SLinus Torvalds goto out; 39751da177e4SLinus Torvalds 3976ca364317SJ.Bruce Fields if ((status = fh_verify(rqstp, &cstate->current_fh, S_IFREG, 0))) { 3977849823c5SNeil Brown dprintk("NFSD: nfsd4_lockt: fh_verify() failed!\n"); 39781da177e4SLinus Torvalds if (status == nfserr_symlink) 39791da177e4SLinus Torvalds status = nfserr_inval; 39801da177e4SLinus Torvalds goto out; 39811da177e4SLinus Torvalds } 39821da177e4SLinus Torvalds 3983ca364317SJ.Bruce Fields inode = cstate->current_fh.fh_dentry->d_inode; 39841da177e4SLinus Torvalds locks_init_lock(&file_lock); 39851da177e4SLinus Torvalds switch (lockt->lt_type) { 39861da177e4SLinus Torvalds case NFS4_READ_LT: 39871da177e4SLinus Torvalds case NFS4_READW_LT: 39881da177e4SLinus Torvalds file_lock.fl_type = F_RDLCK; 39891da177e4SLinus Torvalds break; 39901da177e4SLinus Torvalds case NFS4_WRITE_LT: 39911da177e4SLinus Torvalds case NFS4_WRITEW_LT: 39921da177e4SLinus Torvalds file_lock.fl_type = F_WRLCK; 39931da177e4SLinus Torvalds break; 39941da177e4SLinus Torvalds default: 39952fdada03SJ. Bruce Fields dprintk("NFSD: nfs4_lockt: bad lock type!\n"); 39961da177e4SLinus Torvalds status = nfserr_inval; 39971da177e4SLinus Torvalds goto out; 39981da177e4SLinus Torvalds } 39991da177e4SLinus Torvalds 40001da177e4SLinus Torvalds lockt->lt_stateowner = find_lockstateowner_str(inode, 40011da177e4SLinus Torvalds &lockt->lt_clientid, &lockt->lt_owner); 40021da177e4SLinus Torvalds if (lockt->lt_stateowner) 40031da177e4SLinus Torvalds file_lock.fl_owner = (fl_owner_t)lockt->lt_stateowner; 40041da177e4SLinus Torvalds file_lock.fl_pid = current->tgid; 40051da177e4SLinus Torvalds file_lock.fl_flags = FL_POSIX; 40061da177e4SLinus Torvalds 40071da177e4SLinus Torvalds file_lock.fl_start = lockt->lt_offset; 400887df4de8SBenny Halevy file_lock.fl_end = last_byte_offset(lockt->lt_offset, lockt->lt_length); 40091da177e4SLinus Torvalds 40101da177e4SLinus Torvalds nfs4_transform_lock_offset(&file_lock); 40111da177e4SLinus Torvalds 40121da177e4SLinus Torvalds status = nfs_ok; 401355ef1274SJ. Bruce Fields error = nfsd_test_lock(rqstp, &cstate->current_fh, &file_lock); 4014fd85b817SMarc Eshel if (error) { 4015fd85b817SMarc Eshel status = nfserrno(error); 4016fd85b817SMarc Eshel goto out; 4017fd85b817SMarc Eshel } 40189d6a8c5cSMarc Eshel if (file_lock.fl_type != F_UNLCK) { 40191da177e4SLinus Torvalds status = nfserr_denied; 40209d6a8c5cSMarc Eshel nfs4_set_lock_denied(&file_lock, &lockt->lt_denied); 40211da177e4SLinus Torvalds } 40221da177e4SLinus Torvalds out: 40231da177e4SLinus Torvalds nfs4_unlock_state(); 40241da177e4SLinus Torvalds return status; 40251da177e4SLinus Torvalds } 40261da177e4SLinus Torvalds 4027b37ad28bSAl Viro __be32 4028ca364317SJ.Bruce Fields nfsd4_locku(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, 4029a4f1706aSJ.Bruce Fields struct nfsd4_locku *locku) 40301da177e4SLinus Torvalds { 40311da177e4SLinus Torvalds struct nfs4_stateid *stp; 40321da177e4SLinus Torvalds struct file *filp = NULL; 40331da177e4SLinus Torvalds struct file_lock file_lock; 4034b37ad28bSAl Viro __be32 status; 4035b8dd7b9aSAl Viro int err; 40361da177e4SLinus Torvalds 40371da177e4SLinus Torvalds dprintk("NFSD: nfsd4_locku: start=%Ld length=%Ld\n", 40381da177e4SLinus Torvalds (long long) locku->lu_offset, 40391da177e4SLinus Torvalds (long long) locku->lu_length); 40401da177e4SLinus Torvalds 40411da177e4SLinus Torvalds if (check_lock_length(locku->lu_offset, locku->lu_length)) 40421da177e4SLinus Torvalds return nfserr_inval; 40431da177e4SLinus Torvalds 40441da177e4SLinus Torvalds nfs4_lock_state(); 40451da177e4SLinus Torvalds 4046dd453dfdSBenny Halevy if ((status = nfs4_preprocess_seqid_op(cstate, 40471da177e4SLinus Torvalds locku->lu_seqid, 40481da177e4SLinus Torvalds &locku->lu_stateid, 4049f3362737SJ. Bruce Fields LOCK_STATE, 40501da177e4SLinus Torvalds &locku->lu_stateowner, &stp, NULL))) 40511da177e4SLinus Torvalds goto out; 40521da177e4SLinus Torvalds 4053f9d7562fSJ. Bruce Fields filp = find_any_file(stp->st_file); 4054f9d7562fSJ. Bruce Fields if (!filp) { 4055f9d7562fSJ. Bruce Fields status = nfserr_lock_range; 4056f9d7562fSJ. Bruce Fields goto out; 4057f9d7562fSJ. Bruce Fields } 40581da177e4SLinus Torvalds BUG_ON(!filp); 40591da177e4SLinus Torvalds locks_init_lock(&file_lock); 40601da177e4SLinus Torvalds file_lock.fl_type = F_UNLCK; 40611da177e4SLinus Torvalds file_lock.fl_owner = (fl_owner_t) locku->lu_stateowner; 40621da177e4SLinus Torvalds file_lock.fl_pid = current->tgid; 40631da177e4SLinus Torvalds file_lock.fl_file = filp; 40641da177e4SLinus Torvalds file_lock.fl_flags = FL_POSIX; 4065d5b9026aSNeilBrown file_lock.fl_lmops = &nfsd_posix_mng_ops; 40661da177e4SLinus Torvalds file_lock.fl_start = locku->lu_offset; 40671da177e4SLinus Torvalds 406887df4de8SBenny Halevy file_lock.fl_end = last_byte_offset(locku->lu_offset, locku->lu_length); 40691da177e4SLinus Torvalds nfs4_transform_lock_offset(&file_lock); 40701da177e4SLinus Torvalds 40711da177e4SLinus Torvalds /* 40721da177e4SLinus Torvalds * Try to unlock the file in the VFS. 40731da177e4SLinus Torvalds */ 4074fd85b817SMarc Eshel err = vfs_lock_file(filp, F_SETLK, &file_lock, NULL); 4075b8dd7b9aSAl Viro if (err) { 4076fd85b817SMarc Eshel dprintk("NFSD: nfs4_locku: vfs_lock_file failed!\n"); 40771da177e4SLinus Torvalds goto out_nfserr; 40781da177e4SLinus Torvalds } 40791da177e4SLinus Torvalds /* 40801da177e4SLinus Torvalds * OK, unlock succeeded; the only thing left to do is update the stateid. 40811da177e4SLinus Torvalds */ 40821da177e4SLinus Torvalds update_stateid(&stp->st_stateid); 40831da177e4SLinus Torvalds memcpy(&locku->lu_stateid, &stp->st_stateid, sizeof(stateid_t)); 40841da177e4SLinus Torvalds 40851da177e4SLinus Torvalds out: 4086f2327d9aSNeil Brown if (locku->lu_stateowner) { 40871da177e4SLinus Torvalds nfs4_get_stateowner(locku->lu_stateowner); 4088a4f1706aSJ.Bruce Fields cstate->replay_owner = locku->lu_stateowner; 4089f2327d9aSNeil Brown } 40901da177e4SLinus Torvalds nfs4_unlock_state(); 40911da177e4SLinus Torvalds return status; 40921da177e4SLinus Torvalds 40931da177e4SLinus Torvalds out_nfserr: 4094b8dd7b9aSAl Viro status = nfserrno(err); 40951da177e4SLinus Torvalds goto out; 40961da177e4SLinus Torvalds } 40971da177e4SLinus Torvalds 40981da177e4SLinus Torvalds /* 40991da177e4SLinus Torvalds * returns 41001da177e4SLinus Torvalds * 1: locks held by lockowner 41011da177e4SLinus Torvalds * 0: no locks held by lockowner 41021da177e4SLinus Torvalds */ 41031da177e4SLinus Torvalds static int 4104f9d7562fSJ. Bruce Fields check_for_locks(struct nfs4_file *filp, struct nfs4_stateowner *lowner) 41051da177e4SLinus Torvalds { 41061da177e4SLinus Torvalds struct file_lock **flpp; 4107f9d7562fSJ. Bruce Fields struct inode *inode = filp->fi_inode; 41081da177e4SLinus Torvalds int status = 0; 41091da177e4SLinus Torvalds 4110b89f4321SArnd Bergmann lock_flocks(); 41111da177e4SLinus Torvalds for (flpp = &inode->i_flock; *flpp != NULL; flpp = &(*flpp)->fl_next) { 4112796dadfdSJ. Bruce Fields if ((*flpp)->fl_owner == (fl_owner_t)lowner) { 41131da177e4SLinus Torvalds status = 1; 41141da177e4SLinus Torvalds goto out; 41151da177e4SLinus Torvalds } 4116796dadfdSJ. Bruce Fields } 41171da177e4SLinus Torvalds out: 4118b89f4321SArnd Bergmann unlock_flocks(); 41191da177e4SLinus Torvalds return status; 41201da177e4SLinus Torvalds } 41211da177e4SLinus Torvalds 4122b37ad28bSAl Viro __be32 4123b591480bSJ.Bruce Fields nfsd4_release_lockowner(struct svc_rqst *rqstp, 4124b591480bSJ.Bruce Fields struct nfsd4_compound_state *cstate, 4125b591480bSJ.Bruce Fields struct nfsd4_release_lockowner *rlockowner) 41261da177e4SLinus Torvalds { 41271da177e4SLinus Torvalds clientid_t *clid = &rlockowner->rl_clientid; 41283e9e3dbeSNeilBrown struct nfs4_stateowner *sop; 41293e9e3dbeSNeilBrown struct nfs4_stateid *stp; 41301da177e4SLinus Torvalds struct xdr_netobj *owner = &rlockowner->rl_owner; 41313e9e3dbeSNeilBrown struct list_head matches; 41323e9e3dbeSNeilBrown int i; 4133b37ad28bSAl Viro __be32 status; 41341da177e4SLinus Torvalds 41351da177e4SLinus Torvalds dprintk("nfsd4_release_lockowner clientid: (%08x/%08x):\n", 41361da177e4SLinus Torvalds clid->cl_boot, clid->cl_id); 41371da177e4SLinus Torvalds 41381da177e4SLinus Torvalds /* XXX check for lease expiration */ 41391da177e4SLinus Torvalds 41401da177e4SLinus Torvalds status = nfserr_stale_clientid; 4141849823c5SNeil Brown if (STALE_CLIENTID(clid)) 41421da177e4SLinus Torvalds return status; 41431da177e4SLinus Torvalds 41441da177e4SLinus Torvalds nfs4_lock_state(); 41451da177e4SLinus Torvalds 41461da177e4SLinus Torvalds status = nfserr_locks_held; 41473e9e3dbeSNeilBrown /* XXX: we're doing a linear search through all the lockowners. 41483e9e3dbeSNeilBrown * Yipes! For now we'll just hope clients aren't really using 41493e9e3dbeSNeilBrown * release_lockowner much, but eventually we have to fix these 41503e9e3dbeSNeilBrown * data structures. */ 41513e9e3dbeSNeilBrown INIT_LIST_HEAD(&matches); 41523e9e3dbeSNeilBrown for (i = 0; i < LOCK_HASH_SIZE; i++) { 41533e9e3dbeSNeilBrown list_for_each_entry(sop, &lock_ownerid_hashtbl[i], so_idhash) { 4154599e0a22SJ. Bruce Fields if (!same_owner_str(sop, owner, clid)) 41553e9e3dbeSNeilBrown continue; 41563e9e3dbeSNeilBrown list_for_each_entry(stp, &sop->so_stateids, 4157ea1da636SNeilBrown st_perstateowner) { 4158f9d7562fSJ. Bruce Fields if (check_for_locks(stp->st_file, sop)) 41591da177e4SLinus Torvalds goto out; 41603e9e3dbeSNeilBrown /* Note: so_perclient unused for lockowners, 41613e9e3dbeSNeilBrown * so it's OK to fool with here. */ 41623e9e3dbeSNeilBrown list_add(&sop->so_perclient, &matches); 41631da177e4SLinus Torvalds } 41643e9e3dbeSNeilBrown } 41653e9e3dbeSNeilBrown } 41663e9e3dbeSNeilBrown /* Clients probably won't expect us to return with some (but not all) 41673e9e3dbeSNeilBrown * of the lockowner state released; so don't release any until all 41683e9e3dbeSNeilBrown * have been checked. */ 41691da177e4SLinus Torvalds status = nfs_ok; 41700fa822e4SNeilBrown while (!list_empty(&matches)) { 41710fa822e4SNeilBrown sop = list_entry(matches.next, struct nfs4_stateowner, 41720fa822e4SNeilBrown so_perclient); 41730fa822e4SNeilBrown /* unhash_stateowner deletes so_perclient only 41740fa822e4SNeilBrown * for openowners. */ 41750fa822e4SNeilBrown list_del(&sop->so_perclient); 4176f044ff83SJ. Bruce Fields release_lockowner(sop); 41771da177e4SLinus Torvalds } 41781da177e4SLinus Torvalds out: 41791da177e4SLinus Torvalds nfs4_unlock_state(); 41801da177e4SLinus Torvalds return status; 41811da177e4SLinus Torvalds } 41821da177e4SLinus Torvalds 41831da177e4SLinus Torvalds static inline struct nfs4_client_reclaim * 4184a55370a3SNeilBrown alloc_reclaim(void) 41851da177e4SLinus Torvalds { 4186a55370a3SNeilBrown return kmalloc(sizeof(struct nfs4_client_reclaim), GFP_KERNEL); 41871da177e4SLinus Torvalds } 41881da177e4SLinus Torvalds 4189c7b9a459SNeilBrown int 4190a1bcecd2SAndy Adamson nfs4_has_reclaimed_state(const char *name, bool use_exchange_id) 4191c7b9a459SNeilBrown { 4192c7b9a459SNeilBrown unsigned int strhashval = clientstr_hashval(name); 4193c7b9a459SNeilBrown struct nfs4_client *clp; 4194c7b9a459SNeilBrown 4195e203d506SJ. Bruce Fields clp = find_confirmed_client_by_str(name, strhashval); 4196c7b9a459SNeilBrown return clp ? 1 : 0; 4197c7b9a459SNeilBrown } 4198c7b9a459SNeilBrown 41991da177e4SLinus Torvalds /* 42001da177e4SLinus Torvalds * failure => all reset bets are off, nfserr_no_grace... 42011da177e4SLinus Torvalds */ 4202190e4fbfSNeilBrown int 4203190e4fbfSNeilBrown nfs4_client_to_reclaim(const char *name) 42041da177e4SLinus Torvalds { 42051da177e4SLinus Torvalds unsigned int strhashval; 42061da177e4SLinus Torvalds struct nfs4_client_reclaim *crp = NULL; 42071da177e4SLinus Torvalds 4208a55370a3SNeilBrown dprintk("NFSD nfs4_client_to_reclaim NAME: %.*s\n", HEXDIR_LEN, name); 4209a55370a3SNeilBrown crp = alloc_reclaim(); 42101da177e4SLinus Torvalds if (!crp) 42111da177e4SLinus Torvalds return 0; 4212a55370a3SNeilBrown strhashval = clientstr_hashval(name); 42131da177e4SLinus Torvalds INIT_LIST_HEAD(&crp->cr_strhash); 42141da177e4SLinus Torvalds list_add(&crp->cr_strhash, &reclaim_str_hashtbl[strhashval]); 4215a55370a3SNeilBrown memcpy(crp->cr_recdir, name, HEXDIR_LEN); 42161da177e4SLinus Torvalds reclaim_str_hashtbl_size++; 42171da177e4SLinus Torvalds return 1; 42181da177e4SLinus Torvalds } 42191da177e4SLinus Torvalds 42201da177e4SLinus Torvalds static void 42211da177e4SLinus Torvalds nfs4_release_reclaim(void) 42221da177e4SLinus Torvalds { 42231da177e4SLinus Torvalds struct nfs4_client_reclaim *crp = NULL; 42241da177e4SLinus Torvalds int i; 42251da177e4SLinus Torvalds 42261da177e4SLinus Torvalds for (i = 0; i < CLIENT_HASH_SIZE; i++) { 42271da177e4SLinus Torvalds while (!list_empty(&reclaim_str_hashtbl[i])) { 42281da177e4SLinus Torvalds crp = list_entry(reclaim_str_hashtbl[i].next, 42291da177e4SLinus Torvalds struct nfs4_client_reclaim, cr_strhash); 42301da177e4SLinus Torvalds list_del(&crp->cr_strhash); 42311da177e4SLinus Torvalds kfree(crp); 42321da177e4SLinus Torvalds reclaim_str_hashtbl_size--; 42331da177e4SLinus Torvalds } 42341da177e4SLinus Torvalds } 42351da177e4SLinus Torvalds BUG_ON(reclaim_str_hashtbl_size); 42361da177e4SLinus Torvalds } 42371da177e4SLinus Torvalds 42381da177e4SLinus Torvalds /* 42391da177e4SLinus Torvalds * called from OPEN, CLAIM_PREVIOUS with a new clientid. */ 4240fd39ca9aSNeilBrown static struct nfs4_client_reclaim * 42411da177e4SLinus Torvalds nfs4_find_reclaim_client(clientid_t *clid) 42421da177e4SLinus Torvalds { 42431da177e4SLinus Torvalds unsigned int strhashval; 42441da177e4SLinus Torvalds struct nfs4_client *clp; 42451da177e4SLinus Torvalds struct nfs4_client_reclaim *crp = NULL; 42461da177e4SLinus Torvalds 42471da177e4SLinus Torvalds 42481da177e4SLinus Torvalds /* find clientid in conf_id_hashtbl */ 42491da177e4SLinus Torvalds clp = find_confirmed_client(clid); 42501da177e4SLinus Torvalds if (clp == NULL) 42511da177e4SLinus Torvalds return NULL; 42521da177e4SLinus Torvalds 4253a55370a3SNeilBrown dprintk("NFSD: nfs4_find_reclaim_client for %.*s with recdir %s\n", 4254a55370a3SNeilBrown clp->cl_name.len, clp->cl_name.data, 4255a55370a3SNeilBrown clp->cl_recdir); 42561da177e4SLinus Torvalds 42571da177e4SLinus Torvalds /* find clp->cl_name in reclaim_str_hashtbl */ 4258a55370a3SNeilBrown strhashval = clientstr_hashval(clp->cl_recdir); 42591da177e4SLinus Torvalds list_for_each_entry(crp, &reclaim_str_hashtbl[strhashval], cr_strhash) { 4260a55370a3SNeilBrown if (same_name(crp->cr_recdir, clp->cl_recdir)) { 42611da177e4SLinus Torvalds return crp; 42621da177e4SLinus Torvalds } 42631da177e4SLinus Torvalds } 42641da177e4SLinus Torvalds return NULL; 42651da177e4SLinus Torvalds } 42661da177e4SLinus Torvalds 42671da177e4SLinus Torvalds /* 42681da177e4SLinus Torvalds * Called from OPEN. Look for clientid in reclaim list. 42691da177e4SLinus Torvalds */ 4270b37ad28bSAl Viro __be32 42711da177e4SLinus Torvalds nfs4_check_open_reclaim(clientid_t *clid) 42721da177e4SLinus Torvalds { 4273dfc83565SNeilBrown return nfs4_find_reclaim_client(clid) ? nfs_ok : nfserr_reclaim_bad; 42741da177e4SLinus Torvalds } 42751da177e4SLinus Torvalds 4276ac4d8ff2SNeilBrown /* initialization to perform at module load time: */ 42771da177e4SLinus Torvalds 4278e8ff2a84SJ. Bruce Fields int 4279ac4d8ff2SNeilBrown nfs4_state_init(void) 42801da177e4SLinus Torvalds { 4281e8ff2a84SJ. Bruce Fields int i, status; 42821da177e4SLinus Torvalds 4283e8ff2a84SJ. Bruce Fields status = nfsd4_init_slabs(); 4284e8ff2a84SJ. Bruce Fields if (status) 4285e8ff2a84SJ. Bruce Fields return status; 42861da177e4SLinus Torvalds for (i = 0; i < CLIENT_HASH_SIZE; i++) { 42871da177e4SLinus Torvalds INIT_LIST_HEAD(&conf_id_hashtbl[i]); 42881da177e4SLinus Torvalds INIT_LIST_HEAD(&conf_str_hashtbl[i]); 42891da177e4SLinus Torvalds INIT_LIST_HEAD(&unconf_str_hashtbl[i]); 42901da177e4SLinus Torvalds INIT_LIST_HEAD(&unconf_id_hashtbl[i]); 429102cb2858SWang Chen INIT_LIST_HEAD(&reclaim_str_hashtbl[i]); 42921da177e4SLinus Torvalds } 42935282fd72SMarc Eshel for (i = 0; i < SESSION_HASH_SIZE; i++) 42945282fd72SMarc Eshel INIT_LIST_HEAD(&sessionid_hashtbl[i]); 42951da177e4SLinus Torvalds for (i = 0; i < FILE_HASH_SIZE; i++) { 42961da177e4SLinus Torvalds INIT_LIST_HEAD(&file_hashtbl[i]); 42971da177e4SLinus Torvalds } 42981da177e4SLinus Torvalds for (i = 0; i < OWNER_HASH_SIZE; i++) { 42991da177e4SLinus Torvalds INIT_LIST_HEAD(&ownerstr_hashtbl[i]); 43001da177e4SLinus Torvalds INIT_LIST_HEAD(&ownerid_hashtbl[i]); 43011da177e4SLinus Torvalds } 43021da177e4SLinus Torvalds for (i = 0; i < STATEID_HASH_SIZE; i++) { 43031da177e4SLinus Torvalds INIT_LIST_HEAD(&stateid_hashtbl[i]); 43041da177e4SLinus Torvalds INIT_LIST_HEAD(&lockstateid_hashtbl[i]); 43051da177e4SLinus Torvalds } 43061da177e4SLinus Torvalds for (i = 0; i < LOCK_HASH_SIZE; i++) { 43071da177e4SLinus Torvalds INIT_LIST_HEAD(&lock_ownerid_hashtbl[i]); 43081da177e4SLinus Torvalds INIT_LIST_HEAD(&lock_ownerstr_hashtbl[i]); 43091da177e4SLinus Torvalds } 43101da177e4SLinus Torvalds memset(&onestateid, ~0, sizeof(stateid_t)); 43111da177e4SLinus Torvalds INIT_LIST_HEAD(&close_lru); 43121da177e4SLinus Torvalds INIT_LIST_HEAD(&client_lru); 43131da177e4SLinus Torvalds INIT_LIST_HEAD(&del_recall_lru); 4314ac4d8ff2SNeilBrown reclaim_str_hashtbl_size = 0; 4315e8ff2a84SJ. Bruce Fields return 0; 4316ac4d8ff2SNeilBrown } 4317ac4d8ff2SNeilBrown 4318190e4fbfSNeilBrown static void 4319190e4fbfSNeilBrown nfsd4_load_reboot_recovery_data(void) 4320190e4fbfSNeilBrown { 4321190e4fbfSNeilBrown int status; 4322190e4fbfSNeilBrown 43230964a3d3SNeilBrown nfs4_lock_state(); 43240964a3d3SNeilBrown nfsd4_init_recdir(user_recovery_dirname); 4325190e4fbfSNeilBrown status = nfsd4_recdir_load(); 43260964a3d3SNeilBrown nfs4_unlock_state(); 4327190e4fbfSNeilBrown if (status) 4328190e4fbfSNeilBrown printk("NFSD: Failure reading reboot recovery data\n"); 4329190e4fbfSNeilBrown } 4330190e4fbfSNeilBrown 4331c2f1a551SMeelap Shah /* 4332c2f1a551SMeelap Shah * Since the lifetime of a delegation isn't limited to that of an open, a 4333c2f1a551SMeelap Shah * client may quite reasonably hang on to a delegation as long as it has 4334c2f1a551SMeelap Shah * the inode cached. This becomes an obvious problem the first time a 4335c2f1a551SMeelap Shah * client's inode cache approaches the size of the server's total memory. 4336c2f1a551SMeelap Shah * 4337c2f1a551SMeelap Shah * For now we avoid this problem by imposing a hard limit on the number 4338c2f1a551SMeelap Shah * of delegations, which varies according to the server's memory size. 4339c2f1a551SMeelap Shah */ 4340c2f1a551SMeelap Shah static void 4341c2f1a551SMeelap Shah set_max_delegations(void) 4342c2f1a551SMeelap Shah { 4343c2f1a551SMeelap Shah /* 4344c2f1a551SMeelap Shah * Allow at most 4 delegations per megabyte of RAM. Quick 4345c2f1a551SMeelap Shah * estimates suggest that in the worst case (where every delegation 4346c2f1a551SMeelap Shah * is for a different inode), a delegation could take about 1.5K, 4347c2f1a551SMeelap Shah * giving a worst case usage of about 6% of memory. 4348c2f1a551SMeelap Shah */ 4349c2f1a551SMeelap Shah max_delegations = nr_free_buffer_pages() >> (20 - 2 - PAGE_SHIFT); 4350c2f1a551SMeelap Shah } 4351c2f1a551SMeelap Shah 4352ac4d8ff2SNeilBrown /* initialization to perform when the nfsd service is started: */ 4353ac4d8ff2SNeilBrown 435429ab23ccSJ. Bruce Fields static int 4355ac4d8ff2SNeilBrown __nfs4_state_start(void) 4356ac4d8ff2SNeilBrown { 4357b5a1a81eSJ. Bruce Fields int ret; 4358b5a1a81eSJ. Bruce Fields 43591da177e4SLinus Torvalds boot_time = get_seconds(); 4360af558e33SJ. Bruce Fields locks_start_grace(&nfsd4_manager); 43619a8db97eSMarc Eshel printk(KERN_INFO "NFSD: starting %ld-second grace period\n", 4362e46b498cSJ. Bruce Fields nfsd4_grace); 4363b5a1a81eSJ. Bruce Fields ret = set_callback_cred(); 4364b5a1a81eSJ. Bruce Fields if (ret) 4365b5a1a81eSJ. Bruce Fields return -ENOMEM; 436658da282bSNeilBrown laundry_wq = create_singlethread_workqueue("nfsd4"); 436729ab23ccSJ. Bruce Fields if (laundry_wq == NULL) 436829ab23ccSJ. Bruce Fields return -ENOMEM; 4369b5a1a81eSJ. Bruce Fields ret = nfsd4_create_callback_queue(); 4370b5a1a81eSJ. Bruce Fields if (ret) 4371b5a1a81eSJ. Bruce Fields goto out_free_laundry; 4372e46b498cSJ. Bruce Fields queue_delayed_work(laundry_wq, &laundromat_work, nfsd4_grace * HZ); 4373c2f1a551SMeelap Shah set_max_delegations(); 4374b5a1a81eSJ. Bruce Fields return 0; 4375b5a1a81eSJ. Bruce Fields out_free_laundry: 4376b5a1a81eSJ. Bruce Fields destroy_workqueue(laundry_wq); 4377b5a1a81eSJ. Bruce Fields return ret; 43781da177e4SLinus Torvalds } 43791da177e4SLinus Torvalds 438029ab23ccSJ. Bruce Fields int 438176a3550eSNeilBrown nfs4_state_start(void) 43821da177e4SLinus Torvalds { 4383190e4fbfSNeilBrown nfsd4_load_reboot_recovery_data(); 43844ad9a344SJeff Layton return __nfs4_state_start(); 43851da177e4SLinus Torvalds } 43861da177e4SLinus Torvalds 43871da177e4SLinus Torvalds static void 43881da177e4SLinus Torvalds __nfs4_state_shutdown(void) 43891da177e4SLinus Torvalds { 43901da177e4SLinus Torvalds int i; 43911da177e4SLinus Torvalds struct nfs4_client *clp = NULL; 43921da177e4SLinus Torvalds struct nfs4_delegation *dp = NULL; 43931da177e4SLinus Torvalds struct list_head *pos, *next, reaplist; 43941da177e4SLinus Torvalds 43951da177e4SLinus Torvalds for (i = 0; i < CLIENT_HASH_SIZE; i++) { 43961da177e4SLinus Torvalds while (!list_empty(&conf_id_hashtbl[i])) { 43971da177e4SLinus Torvalds clp = list_entry(conf_id_hashtbl[i].next, struct nfs4_client, cl_idhash); 43981da177e4SLinus Torvalds expire_client(clp); 43991da177e4SLinus Torvalds } 44001da177e4SLinus Torvalds while (!list_empty(&unconf_str_hashtbl[i])) { 44011da177e4SLinus Torvalds clp = list_entry(unconf_str_hashtbl[i].next, struct nfs4_client, cl_strhash); 44021da177e4SLinus Torvalds expire_client(clp); 44031da177e4SLinus Torvalds } 44041da177e4SLinus Torvalds } 44051da177e4SLinus Torvalds INIT_LIST_HEAD(&reaplist); 44061da177e4SLinus Torvalds spin_lock(&recall_lock); 44071da177e4SLinus Torvalds list_for_each_safe(pos, next, &del_recall_lru) { 44081da177e4SLinus Torvalds dp = list_entry (pos, struct nfs4_delegation, dl_recall_lru); 44091da177e4SLinus Torvalds list_move(&dp->dl_recall_lru, &reaplist); 44101da177e4SLinus Torvalds } 44111da177e4SLinus Torvalds spin_unlock(&recall_lock); 44121da177e4SLinus Torvalds list_for_each_safe(pos, next, &reaplist) { 44131da177e4SLinus Torvalds dp = list_entry (pos, struct nfs4_delegation, dl_recall_lru); 44141da177e4SLinus Torvalds list_del_init(&dp->dl_recall_lru); 44151da177e4SLinus Torvalds unhash_delegation(dp); 44161da177e4SLinus Torvalds } 44171da177e4SLinus Torvalds 4418190e4fbfSNeilBrown nfsd4_shutdown_recdir(); 44191da177e4SLinus Torvalds } 44201da177e4SLinus Torvalds 44211da177e4SLinus Torvalds void 44221da177e4SLinus Torvalds nfs4_state_shutdown(void) 44231da177e4SLinus Torvalds { 4424afe2c511STejun Heo cancel_delayed_work_sync(&laundromat_work); 44255e8d5c29SNeilBrown destroy_workqueue(laundry_wq); 44262c5e7615SJ. Bruce Fields locks_end_grace(&nfsd4_manager); 44271da177e4SLinus Torvalds nfs4_lock_state(); 44281da177e4SLinus Torvalds nfs4_release_reclaim(); 44291da177e4SLinus Torvalds __nfs4_state_shutdown(); 44301da177e4SLinus Torvalds nfs4_unlock_state(); 4431c3935e30SJ. Bruce Fields nfsd4_destroy_callback_queue(); 44321da177e4SLinus Torvalds } 44331da177e4SLinus Torvalds 44343dd98a3bSJeff Layton /* 44353dd98a3bSJeff Layton * user_recovery_dirname is protected by the nfsd_mutex since it's only 44363dd98a3bSJeff Layton * accessed when nfsd is starting. 44373dd98a3bSJeff Layton */ 44380964a3d3SNeilBrown static void 44390964a3d3SNeilBrown nfs4_set_recdir(char *recdir) 44400964a3d3SNeilBrown { 44410964a3d3SNeilBrown strcpy(user_recovery_dirname, recdir); 44420964a3d3SNeilBrown } 44430964a3d3SNeilBrown 44440964a3d3SNeilBrown /* 44450964a3d3SNeilBrown * Change the NFSv4 recovery directory to recdir. 44460964a3d3SNeilBrown */ 44470964a3d3SNeilBrown int 44480964a3d3SNeilBrown nfs4_reset_recoverydir(char *recdir) 44490964a3d3SNeilBrown { 44500964a3d3SNeilBrown int status; 4451a63bb996SAl Viro struct path path; 44520964a3d3SNeilBrown 4453a63bb996SAl Viro status = kern_path(recdir, LOOKUP_FOLLOW, &path); 44540964a3d3SNeilBrown if (status) 44550964a3d3SNeilBrown return status; 44560964a3d3SNeilBrown status = -ENOTDIR; 4457a63bb996SAl Viro if (S_ISDIR(path.dentry->d_inode->i_mode)) { 44580964a3d3SNeilBrown nfs4_set_recdir(recdir); 44590964a3d3SNeilBrown status = 0; 44600964a3d3SNeilBrown } 4461a63bb996SAl Viro path_put(&path); 44620964a3d3SNeilBrown return status; 44630964a3d3SNeilBrown } 44640964a3d3SNeilBrown 44653dd98a3bSJeff Layton char * 44663dd98a3bSJeff Layton nfs4_recoverydir(void) 44673dd98a3bSJeff Layton { 44683dd98a3bSJeff Layton return user_recovery_dirname; 44693dd98a3bSJeff Layton } 4470