1f7b422b1SDavid Howells /* 2f7b422b1SDavid Howells * NFS internal definitions 3f7b422b1SDavid Howells */ 4f7b422b1SDavid Howells 5eedc020eSAndy Adamson #include "nfs4_fs.h" 6f7b422b1SDavid Howells #include <linux/mount.h> 7f9c3a380SEric Paris #include <linux/security.h> 8f7b422b1SDavid Howells 908734048SDavid Howells #define NFS_MS_MASK (MS_RDONLY|MS_NOSUID|MS_NODEV|MS_NOEXEC|MS_SYNCHRONOUS) 1008734048SDavid Howells 1154ceac45SDavid Howells struct nfs_string; 1254ceac45SDavid Howells 1354ceac45SDavid Howells /* Maximum number of readahead requests 1454ceac45SDavid Howells * FIXME: this should really be a sysctl so that users may tune it to suit 1554ceac45SDavid Howells * their needs. People that do NFS over a slow network, might for 1654ceac45SDavid Howells * instance want to reduce it to something closer to 1 for improved 1754ceac45SDavid Howells * interactive response. 1854ceac45SDavid Howells */ 1954ceac45SDavid Howells #define NFS_MAX_READAHEAD (RPC_DEF_SLOT_TABLE - 1) 2054ceac45SDavid Howells 21eedc020eSAndy Adamson /* 22eedc020eSAndy Adamson * Determine if sessions are in use. 23eedc020eSAndy Adamson */ 24eedc020eSAndy Adamson static inline int nfs4_has_session(const struct nfs_client *clp) 25eedc020eSAndy Adamson { 26eedc020eSAndy Adamson #ifdef CONFIG_NFS_V4_1 27eedc020eSAndy Adamson if (clp->cl_session) 28eedc020eSAndy Adamson return 1; 29eedc020eSAndy Adamson #endif /* CONFIG_NFS_V4_1 */ 30eedc020eSAndy Adamson return 0; 31eedc020eSAndy Adamson } 32eedc020eSAndy Adamson 33d8cb1a7cSAlexandros Batsakis static inline int nfs4_has_persistent_session(const struct nfs_client *clp) 34d8cb1a7cSAlexandros Batsakis { 35d8cb1a7cSAlexandros Batsakis #ifdef CONFIG_NFS_V4_1 36d8cb1a7cSAlexandros Batsakis if (nfs4_has_session(clp)) 37d8cb1a7cSAlexandros Batsakis return (clp->cl_session->flags & SESSION4_PERSIST); 38d8cb1a7cSAlexandros Batsakis #endif /* CONFIG_NFS_V4_1 */ 39d8cb1a7cSAlexandros Batsakis return 0; 40d8cb1a7cSAlexandros Batsakis } 41d8cb1a7cSAlexandros Batsakis 427ebb9315SBryan Schumaker static inline void nfs_attr_check_mountpoint(struct super_block *parent, struct nfs_fattr *fattr) 437ebb9315SBryan Schumaker { 447ebb9315SBryan Schumaker if (!nfs_fsid_equal(&NFS_SB(parent)->fsid, &fattr->fsid)) 457ebb9315SBryan Schumaker fattr->valid |= NFS_ATTR_FATTR_MOUNTPOINT; 467ebb9315SBryan Schumaker } 477ebb9315SBryan Schumaker 48533eb461SAndy Adamson static inline int nfs_attr_use_mounted_on_fileid(struct nfs_fattr *fattr) 49533eb461SAndy Adamson { 50533eb461SAndy Adamson if (((fattr->valid & NFS_ATTR_FATTR_MOUNTED_ON_FILEID) == 0) || 51533eb461SAndy Adamson (((fattr->valid & NFS_ATTR_FATTR_MOUNTPOINT) == 0) && 52533eb461SAndy Adamson ((fattr->valid & NFS_ATTR_FATTR_V4_REFERRAL) == 0))) 53533eb461SAndy Adamson return 0; 54533eb461SAndy Adamson 55533eb461SAndy Adamson fattr->fileid = fattr->mounted_on_fileid; 56533eb461SAndy Adamson return 1; 57533eb461SAndy Adamson } 58533eb461SAndy Adamson 59f7b422b1SDavid Howells struct nfs_clone_mount { 60f7b422b1SDavid Howells const struct super_block *sb; 61f7b422b1SDavid Howells const struct dentry *dentry; 62f7b422b1SDavid Howells struct nfs_fh *fh; 63f7b422b1SDavid Howells struct nfs_fattr *fattr; 64f7b422b1SDavid Howells char *hostname; 65f7b422b1SDavid Howells char *mnt_path; 666677d095SChuck Lever struct sockaddr *addr; 676677d095SChuck Lever size_t addrlen; 68f7b422b1SDavid Howells rpc_authflavor_t authflavor; 69f7b422b1SDavid Howells }; 70f7b422b1SDavid Howells 716b18eaa0S\"Talpey, Thomas\ /* 72a14017dbSChuck Lever * Note: RFC 1813 doesn't limit the number of auth flavors that 73a14017dbSChuck Lever * a server can return, so make something up. 74a14017dbSChuck Lever */ 75a14017dbSChuck Lever #define NFS_MAX_SECFLAVORS (12) 76a14017dbSChuck Lever 77a14017dbSChuck Lever /* 784cfd74fcSChuck Lever * Value used if the user did not specify a port value. 794cfd74fcSChuck Lever */ 804cfd74fcSChuck Lever #define NFS_UNSPEC_PORT (-1) 814cfd74fcSChuck Lever 824cfd74fcSChuck Lever /* 8356e4ebf8SBryan Schumaker * Maximum number of pages that readdir can use for creating 8456e4ebf8SBryan Schumaker * a vmapped array of pages. 8556e4ebf8SBryan Schumaker */ 8656e4ebf8SBryan Schumaker #define NFS_MAX_READDIR_PAGES 8 8756e4ebf8SBryan Schumaker 88fcf10398SBryan Schumaker struct nfs_client_initdata { 89fcf10398SBryan Schumaker unsigned long init_flags; 90fcf10398SBryan Schumaker const char *hostname; 91fcf10398SBryan Schumaker const struct sockaddr *addr; 92fcf10398SBryan Schumaker size_t addrlen; 93ab7017a3SBryan Schumaker struct nfs_subversion *nfs_mod; 94fcf10398SBryan Schumaker int proto; 95fcf10398SBryan Schumaker u32 minorversion; 96fcf10398SBryan Schumaker struct net *net; 97fcf10398SBryan Schumaker }; 98fcf10398SBryan Schumaker 9956e4ebf8SBryan Schumaker /* 1006b18eaa0S\"Talpey, Thomas\ * In-kernel mount arguments 1016b18eaa0S\"Talpey, Thomas\ */ 1026b18eaa0S\"Talpey, Thomas\ struct nfs_parsed_mount_data { 1036b18eaa0S\"Talpey, Thomas\ int flags; 1046b18eaa0S\"Talpey, Thomas\ int rsize, wsize; 1056b18eaa0S\"Talpey, Thomas\ int timeo, retrans; 1066b18eaa0S\"Talpey, Thomas\ int acregmin, acregmax, 1076b18eaa0S\"Talpey, Thomas\ acdirmin, acdirmax; 1086b18eaa0S\"Talpey, Thomas\ int namlen; 109b797cac7SDavid Howells unsigned int options; 1106b18eaa0S\"Talpey, Thomas\ unsigned int bsize; 1116b18eaa0S\"Talpey, Thomas\ unsigned int auth_flavor_len; 1126b18eaa0S\"Talpey, Thomas\ rpc_authflavor_t auth_flavors[1]; 1136b18eaa0S\"Talpey, Thomas\ char *client_address; 114764302ccSChuck Lever unsigned int version; 1153fd5be9eSMike Sager unsigned int minorversion; 11608734048SDavid Howells char *fscache_uniq; 117b72e4f42SBryan Schumaker bool need_mount; 1186b18eaa0S\"Talpey, Thomas\ 1196b18eaa0S\"Talpey, Thomas\ struct { 1204c568017SChuck Lever struct sockaddr_storage address; 1214c568017SChuck Lever size_t addrlen; 1226b18eaa0S\"Talpey, Thomas\ char *hostname; 12378fa701fSChuck Lever u32 version; 1244cfd74fcSChuck Lever int port; 12578fa701fSChuck Lever unsigned short protocol; 1266b18eaa0S\"Talpey, Thomas\ } mount_server; 1276b18eaa0S\"Talpey, Thomas\ 1286b18eaa0S\"Talpey, Thomas\ struct { 1294c568017SChuck Lever struct sockaddr_storage address; 1304c568017SChuck Lever size_t addrlen; 1316b18eaa0S\"Talpey, Thomas\ char *hostname; 1326b18eaa0S\"Talpey, Thomas\ char *export_path; 1334cfd74fcSChuck Lever int port; 13478fa701fSChuck Lever unsigned short protocol; 1356b18eaa0S\"Talpey, Thomas\ } nfs_server; 136f9c3a380SEric Paris 137f9c3a380SEric Paris struct security_mnt_opts lsm_opts; 138e50a7a1aSStanislav Kinsbursky struct net *net; 1396b18eaa0S\"Talpey, Thomas\ }; 1406b18eaa0S\"Talpey, Thomas\ 141146ec944SChuck Lever /* mount_clnt.c */ 142c5d120f8SChuck Lever struct nfs_mount_request { 143c5d120f8SChuck Lever struct sockaddr *sap; 144c5d120f8SChuck Lever size_t salen; 145c5d120f8SChuck Lever char *hostname; 146c5d120f8SChuck Lever char *dirpath; 147c5d120f8SChuck Lever u32 version; 148c5d120f8SChuck Lever unsigned short protocol; 149c5d120f8SChuck Lever struct nfs_fh *fh; 15050a737f8SChuck Lever int noresvport; 1518e02f6b9SChuck Lever unsigned int *auth_flav_len; 1528e02f6b9SChuck Lever rpc_authflavor_t *auth_flavs; 1536d59b8d5SStanislav Kinsbursky struct net *net; 154c5d120f8SChuck Lever }; 155c5d120f8SChuck Lever 156fbdefd64SBryan Schumaker struct nfs_mount_info { 157fbdefd64SBryan Schumaker void (*fill_super)(struct super_block *, struct nfs_mount_info *); 158fbdefd64SBryan Schumaker int (*set_security)(struct super_block *, struct dentry *, struct nfs_mount_info *); 159fbdefd64SBryan Schumaker struct nfs_parsed_mount_data *parsed; 160fbdefd64SBryan Schumaker struct nfs_clone_mount *cloned; 161fbdefd64SBryan Schumaker struct nfs_fh *mntfh; 162fbdefd64SBryan Schumaker }; 163fbdefd64SBryan Schumaker 164c5d120f8SChuck Lever extern int nfs_mount(struct nfs_mount_request *info); 1650b524123SChuck Lever extern void nfs_umount(const struct nfs_mount_request *info); 166146ec944SChuck Lever 16724c8dbbbSDavid Howells /* client.c */ 168a613fa16STrond Myklebust extern const struct rpc_program nfs_program; 1696b13168bSStanislav Kinsbursky extern void nfs_clients_init(struct net *net); 1706663ee7fSBryan Schumaker extern struct nfs_client *nfs_alloc_client(const struct nfs_client_initdata *); 171428360d7SBryan Schumaker int nfs_create_rpc_client(struct nfs_client *, const struct rpc_timeout *, rpc_authflavor_t); 172fcf10398SBryan Schumaker struct nfs_client *nfs_get_client(const struct nfs_client_initdata *, 173fcf10398SBryan Schumaker const struct rpc_timeout *, const char *, 174fcf10398SBryan Schumaker rpc_authflavor_t); 175fcf10398SBryan Schumaker int nfs_probe_fsinfo(struct nfs_server *server, struct nfs_fh *, struct nfs_fattr *); 176fcf10398SBryan Schumaker void nfs_server_insert_lists(struct nfs_server *); 177fcf10398SBryan Schumaker void nfs_init_timeout_values(struct rpc_timeout *, int, unsigned int, unsigned int); 178fcf10398SBryan Schumaker int nfs_init_server_rpcclient(struct nfs_server *, const struct rpc_timeout *t, 179fcf10398SBryan Schumaker rpc_authflavor_t); 180fcf10398SBryan Schumaker struct nfs_server *nfs_alloc_server(void); 181fcf10398SBryan Schumaker void nfs_server_copy_userdata(struct nfs_server *, struct nfs_server *); 18254ceac45SDavid Howells 18328cd1b3fSStanislav Kinsbursky extern void nfs_cleanup_cb_ident_idr(struct net *); 18424c8dbbbSDavid Howells extern void nfs_put_client(struct nfs_client *); 185cdb7ecedSBryan Schumaker extern void nfs_free_client(struct nfs_client *); 18628cd1b3fSStanislav Kinsbursky extern struct nfs_client *nfs4_find_client_ident(struct net *, int); 187c36fca52SAndy Adamson extern struct nfs_client * 188c7add9a9SStanislav Kinsbursky nfs4_find_client_sessionid(struct net *, const struct sockaddr *, 189c7add9a9SStanislav Kinsbursky struct nfs4_sessionid *); 1901179acc6SBryan Schumaker extern struct nfs_server *nfs_create_server(struct nfs_mount_info *, 191ab7017a3SBryan Schumaker struct nfs_subversion *); 19291ea40b9S\"Talpey, Thomas\ extern struct nfs_server *nfs4_create_server( 1931179acc6SBryan Schumaker struct nfs_mount_info *, 1941179acc6SBryan Schumaker struct nfs_subversion *); 19554ceac45SDavid Howells extern struct nfs_server *nfs4_create_referral_server(struct nfs_clone_mount *, 19654ceac45SDavid Howells struct nfs_fh *); 19754ceac45SDavid Howells extern void nfs_free_server(struct nfs_server *server); 19854ceac45SDavid Howells extern struct nfs_server *nfs_clone_server(struct nfs_server *, 19954ceac45SDavid Howells struct nfs_fh *, 2007e6eb683SBryan Schumaker struct nfs_fattr *, 2017e6eb683SBryan Schumaker rpc_authflavor_t); 2024697bd5eSTrond Myklebust extern int nfs_wait_client_init_complete(const struct nfs_client *clp); 20376db6d95SAndy Adamson extern void nfs_mark_client_ready(struct nfs_client *clp, int state); 204d83217c1SAndy Adamson extern struct nfs_client *nfs4_set_ds_client(struct nfs_client* mds_clp, 205d83217c1SAndy Adamson const struct sockaddr *ds_addr, 20698fc685aSAndy Adamson int ds_addrlen, int ds_proto, 20798fc685aSAndy Adamson unsigned int ds_timeo, 20898fc685aSAndy Adamson unsigned int ds_retrans); 2096aaca566SDavid Howells #ifdef CONFIG_PROC_FS 2106aaca566SDavid Howells extern int __init nfs_fs_proc_init(void); 2116aaca566SDavid Howells extern void nfs_fs_proc_exit(void); 2126aaca566SDavid Howells #else 2136aaca566SDavid Howells static inline int nfs_fs_proc_init(void) 2146aaca566SDavid Howells { 2156aaca566SDavid Howells return 0; 2166aaca566SDavid Howells } 2176aaca566SDavid Howells static inline void nfs_fs_proc_exit(void) 2186aaca566SDavid Howells { 2196aaca566SDavid Howells } 2206aaca566SDavid Howells #endif 22124c8dbbbSDavid Howells 222fcf10398SBryan Schumaker #ifdef CONFIG_NFS_V4_1 223fcf10398SBryan Schumaker int nfs_sockaddr_match_ipaddr(const struct sockaddr *, const struct sockaddr *); 224fcf10398SBryan Schumaker #endif 225fcf10398SBryan Schumaker 2261179acc6SBryan Schumaker /* nfs3client.c */ 2271c606fb7SBryan Schumaker #if IS_ENABLED(CONFIG_NFS_V3) 2281179acc6SBryan Schumaker struct nfs_server *nfs3_create_server(struct nfs_mount_info *, struct nfs_subversion *); 2291179acc6SBryan Schumaker struct nfs_server *nfs3_clone_server(struct nfs_server *, struct nfs_fh *, 2301179acc6SBryan Schumaker struct nfs_fattr *, rpc_authflavor_t); 2311179acc6SBryan Schumaker #endif 2321179acc6SBryan Schumaker 233f7b422b1SDavid Howells /* callback_xdr.c */ 234f7b422b1SDavid Howells extern struct svc_version nfs4_callback_version1; 23507bccc2dSAlexandros Batsakis extern struct svc_version nfs4_callback_version4; 236f7b422b1SDavid Howells 2374db6e0b7SFred Isaman struct nfs_pageio_descriptor; 238f7b422b1SDavid Howells /* pagelist.c */ 239f7b422b1SDavid Howells extern int __init nfs_init_nfspagecache(void); 240266bee88SDavid Brownell extern void nfs_destroy_nfspagecache(void); 241f7b422b1SDavid Howells extern int __init nfs_init_readpagecache(void); 242266bee88SDavid Brownell extern void nfs_destroy_readpagecache(void); 243f7b422b1SDavid Howells extern int __init nfs_init_writepagecache(void); 244266bee88SDavid Brownell extern void nfs_destroy_writepagecache(void); 245f7b422b1SDavid Howells 246f7b422b1SDavid Howells extern int __init nfs_init_directcache(void); 247266bee88SDavid Brownell extern void nfs_destroy_directcache(void); 24830dd374fSFred Isaman extern bool nfs_pgarray_set(struct nfs_page_array *p, unsigned int pagecount); 2494db6e0b7SFred Isaman extern void nfs_pgheader_init(struct nfs_pageio_descriptor *desc, 2504db6e0b7SFred Isaman struct nfs_pgio_header *hdr, 2514db6e0b7SFred Isaman void (*release)(struct nfs_pgio_header *hdr)); 2524db6e0b7SFred Isaman void nfs_set_pgio_error(struct nfs_pgio_header *hdr, int error, loff_t pos); 253f7b422b1SDavid Howells 254f7b422b1SDavid Howells /* nfs2xdr.c */ 255f7b422b1SDavid Howells extern struct rpc_procinfo nfs_procedures[]; 256573c4e1eSChuck Lever extern int nfs2_decode_dirent(struct xdr_stream *, 257573c4e1eSChuck Lever struct nfs_entry *, int); 258f7b422b1SDavid Howells 259f7b422b1SDavid Howells /* nfs3xdr.c */ 260f7b422b1SDavid Howells extern struct rpc_procinfo nfs3_procedures[]; 261573c4e1eSChuck Lever extern int nfs3_decode_dirent(struct xdr_stream *, 262573c4e1eSChuck Lever struct nfs_entry *, int); 263f7b422b1SDavid Howells 264f7b422b1SDavid Howells /* nfs4xdr.c */ 2657d4e2747SDavid Howells #ifdef CONFIG_NFS_V4 266573c4e1eSChuck Lever extern int nfs4_decode_dirent(struct xdr_stream *, 267573c4e1eSChuck Lever struct nfs_entry *, int); 2687d4e2747SDavid Howells #endif 2692449ea2eSAlexandros Batsakis #ifdef CONFIG_NFS_V4_1 2702449ea2eSAlexandros Batsakis extern const u32 nfs41_maxread_overhead; 2712449ea2eSAlexandros Batsakis extern const u32 nfs41_maxwrite_overhead; 2722449ea2eSAlexandros Batsakis #endif 273f7b422b1SDavid Howells 274f7b422b1SDavid Howells /* nfs4proc.c */ 275d75d5414SAndrew Morton #ifdef CONFIG_NFS_V4 276f7b422b1SDavid Howells extern struct rpc_procinfo nfs4_procedures[]; 277d75d5414SAndrew Morton #endif 278f7b422b1SDavid Howells 2797b38c368STrond Myklebust extern int nfs4_init_ds_session(struct nfs_client *, unsigned long); 280d83217c1SAndy Adamson 2817fe5c398STrond Myklebust /* proc.c */ 2827fe5c398STrond Myklebust void nfs_close_context(struct nfs_open_context *ctx, int is_sync); 2838cab4c39SChuck Lever extern struct nfs_client *nfs_init_client(struct nfs_client *clp, 28445a52a02SAndy Adamson const struct rpc_timeout *timeparms, 2854bf590e0SChuck Lever const char *ip_addr, rpc_authflavor_t authflavour); 2867fe5c398STrond Myklebust 287979df72eSTrond Myklebust /* dir.c */ 2887f8275d0SDave Chinner extern int nfs_access_cache_shrinker(struct shrinker *shrink, 2891495f230SYing Han struct shrink_control *sc); 290597d9289SBryan Schumaker struct dentry *nfs_lookup(struct inode *, struct dentry *, unsigned int); 291597d9289SBryan Schumaker int nfs_create(struct inode *, struct dentry *, umode_t, bool); 292597d9289SBryan Schumaker int nfs_mkdir(struct inode *, struct dentry *, umode_t); 293597d9289SBryan Schumaker int nfs_rmdir(struct inode *, struct dentry *); 294597d9289SBryan Schumaker int nfs_unlink(struct inode *, struct dentry *); 295597d9289SBryan Schumaker int nfs_symlink(struct inode *, struct dentry *, const char *); 296597d9289SBryan Schumaker int nfs_link(struct dentry *, struct inode *, struct dentry *); 297597d9289SBryan Schumaker int nfs_mknod(struct inode *, struct dentry *, umode_t, dev_t); 298597d9289SBryan Schumaker int nfs_rename(struct inode *, struct dentry *, struct inode *, struct dentry *); 299979df72eSTrond Myklebust 300ce4ef7c0SBryan Schumaker /* file.c */ 301ce4ef7c0SBryan Schumaker int nfs_file_fsync_commit(struct file *, loff_t, loff_t, int); 302ce4ef7c0SBryan Schumaker loff_t nfs_file_llseek(struct file *, loff_t, int); 303ce4ef7c0SBryan Schumaker int nfs_file_flush(struct file *, fl_owner_t); 304ce4ef7c0SBryan Schumaker ssize_t nfs_file_read(struct kiocb *, const struct iovec *, unsigned long, loff_t); 305ce4ef7c0SBryan Schumaker ssize_t nfs_file_splice_read(struct file *, loff_t *, struct pipe_inode_info *, 306ce4ef7c0SBryan Schumaker size_t, unsigned int); 307ce4ef7c0SBryan Schumaker int nfs_file_mmap(struct file *, struct vm_area_struct *); 308ce4ef7c0SBryan Schumaker ssize_t nfs_file_write(struct kiocb *, const struct iovec *, unsigned long, loff_t); 309ce4ef7c0SBryan Schumaker int nfs_file_release(struct inode *, struct file *); 310ce4ef7c0SBryan Schumaker int nfs_lock(struct file *, int, struct file_lock *); 311ce4ef7c0SBryan Schumaker int nfs_flock(struct file *, int, struct file_lock *); 312ce4ef7c0SBryan Schumaker ssize_t nfs_file_splice_write(struct pipe_inode_info *, struct file *, loff_t *, 313ce4ef7c0SBryan Schumaker size_t, unsigned int); 314ce4ef7c0SBryan Schumaker int nfs_check_flags(int); 315ce4ef7c0SBryan Schumaker int nfs_setlease(struct file *, long, struct file_lock **); 316ce4ef7c0SBryan Schumaker 317f7b422b1SDavid Howells /* inode.c */ 3185746006fSTrond Myklebust extern struct workqueue_struct *nfsiod_workqueue; 319f7b422b1SDavid Howells extern struct inode *nfs_alloc_inode(struct super_block *sb); 320f7b422b1SDavid Howells extern void nfs_destroy_inode(struct inode *); 321a9185b41SChristoph Hellwig extern int nfs_write_inode(struct inode *, struct writeback_control *); 32219d87ca3SBryan Schumaker extern void nfs_clear_inode(struct inode *); 323b57922d9SAl Viro extern void nfs_evict_inode(struct inode *); 324f41f7418STrond Myklebust void nfs_zap_acl_cache(struct inode *inode); 32572cb77f4STrond Myklebust extern int nfs_wait_bit_killable(void *word); 326f7b422b1SDavid Howells 327f7b422b1SDavid Howells /* super.c */ 3286a74490dSBryan Schumaker extern const struct super_operations nfs_sops; 329ab7017a3SBryan Schumaker extern struct file_system_type nfs_fs_type; 33054ceac45SDavid Howells extern struct file_system_type nfs_xdev_fs_type; 331f7b422b1SDavid Howells #ifdef CONFIG_NFS_V4 33254ceac45SDavid Howells extern struct file_system_type nfs4_xdev_fs_type; 33354ceac45SDavid Howells extern struct file_system_type nfs4_referral_fs_type; 334f7b422b1SDavid Howells #endif 335ff9099f2SBryan Schumaker struct dentry *nfs_try_mount(int, const char *, struct nfs_mount_info *, 336ff9099f2SBryan Schumaker struct nfs_subversion *); 337fbdefd64SBryan Schumaker void nfs_initialise_sb(struct super_block *); 338fbdefd64SBryan Schumaker int nfs_set_sb_security(struct super_block *, struct dentry *, struct nfs_mount_info *); 339fbdefd64SBryan Schumaker int nfs_clone_sb_security(struct super_block *, struct dentry *, struct nfs_mount_info *); 340ab7017a3SBryan Schumaker struct dentry *nfs_fs_mount_common(struct nfs_server *, int, const char *, 341ab7017a3SBryan Schumaker struct nfs_mount_info *, struct nfs_subversion *); 342fbdefd64SBryan Schumaker struct dentry *nfs_fs_mount(struct file_system_type *, int, const char *, void *); 343fbdefd64SBryan Schumaker struct dentry * nfs_xdev_mount_common(struct file_system_type *, int, 344fbdefd64SBryan Schumaker const char *, struct nfs_mount_info *); 345fbdefd64SBryan Schumaker void nfs_kill_super(struct super_block *); 346fbdefd64SBryan Schumaker void nfs_fill_super(struct super_block *, struct nfs_mount_info *); 3474ebd9ab3SDominik Hackl 348f7b422b1SDavid Howells extern struct rpc_stat nfs_rpcstat; 3494ebd9ab3SDominik Hackl 350f7b422b1SDavid Howells extern int __init register_nfs_fs(void); 351f7b422b1SDavid Howells extern void __exit unregister_nfs_fs(void); 3521daef0a8STrond Myklebust extern void nfs_sb_active(struct super_block *sb); 3531daef0a8STrond Myklebust extern void nfs_sb_deactive(struct super_block *sb); 354f7b422b1SDavid Howells 355f7b422b1SDavid Howells /* namespace.c */ 356b514f872SAl Viro extern char *nfs_path(char **p, struct dentry *dentry, 357f7b422b1SDavid Howells char *buffer, ssize_t buflen); 35836d43a43SDavid Howells extern struct vfsmount *nfs_d_automount(struct path *path); 359281cad46SBryan Schumaker struct vfsmount *nfs_submount(struct nfs_server *, struct dentry *, 360281cad46SBryan Schumaker struct nfs_fh *, struct nfs_fattr *); 361281cad46SBryan Schumaker struct vfsmount *nfs_do_submount(struct dentry *, struct nfs_fh *, 362281cad46SBryan Schumaker struct nfs_fattr *, rpc_authflavor_t); 363f7b422b1SDavid Howells 36454ceac45SDavid Howells /* getroot.c */ 3650d5839adSAl Viro extern struct dentry *nfs_get_root(struct super_block *, struct nfs_fh *, 3660d5839adSAl Viro const char *); 3677d4e2747SDavid Howells #ifdef CONFIG_NFS_V4 3680d5839adSAl Viro extern struct dentry *nfs4_get_root(struct super_block *, struct nfs_fh *, 3690d5839adSAl Viro const char *); 37054ceac45SDavid Howells 371815409d2STrond Myklebust extern int nfs4_get_rootfh(struct nfs_server *server, struct nfs_fh *mntfh); 3727d4e2747SDavid Howells #endif 373f7b422b1SDavid Howells 374061ae2edSFred Isaman struct nfs_pgio_completion_ops; 375f11c88afSAndy Adamson /* read.c */ 3764db6e0b7SFred Isaman extern struct nfs_read_header *nfs_readhdr_alloc(void); 377cd841605SFred Isaman extern void nfs_readhdr_free(struct nfs_pgio_header *hdr); 378584aa810SFred Isaman extern void nfs_pageio_init_read(struct nfs_pageio_descriptor *pgio, 379584aa810SFred Isaman struct inode *inode, 380584aa810SFred Isaman const struct nfs_pgio_completion_ops *compl_ops); 381c5996c4eSFred Isaman extern int nfs_initiate_read(struct rpc_clnt *clnt, 382c5996c4eSFred Isaman struct nfs_read_data *data, 3839f0ec176SAndy Adamson const struct rpc_call_ops *call_ops, int flags); 384f11c88afSAndy Adamson extern void nfs_read_prepare(struct rpc_task *task, void *calldata); 385493292ddSTrond Myklebust extern int nfs_generic_pagein(struct nfs_pageio_descriptor *desc, 3864db6e0b7SFred Isaman struct nfs_pgio_header *hdr); 3871abb5088SBryan Schumaker extern void nfs_pageio_init_read(struct nfs_pageio_descriptor *pgio, 388061ae2edSFred Isaman struct inode *inode, 389061ae2edSFred Isaman const struct nfs_pgio_completion_ops *compl_ops); 390493292ddSTrond Myklebust extern void nfs_pageio_reset_read_mds(struct nfs_pageio_descriptor *pgio); 391493292ddSTrond Myklebust extern void nfs_readdata_release(struct nfs_read_data *rdata); 392e885de1aSTrond Myklebust 393fbdefd64SBryan Schumaker /* super.c */ 394fbdefd64SBryan Schumaker void nfs_clone_super(struct super_block *, struct nfs_mount_info *); 395fbdefd64SBryan Schumaker void nfs_umount_begin(struct super_block *); 396fbdefd64SBryan Schumaker int nfs_statfs(struct dentry *, struct kstatfs *); 397fbdefd64SBryan Schumaker int nfs_show_options(struct seq_file *, struct dentry *); 398fbdefd64SBryan Schumaker int nfs_show_devname(struct seq_file *, struct dentry *); 399fbdefd64SBryan Schumaker int nfs_show_path(struct seq_file *, struct dentry *); 400fbdefd64SBryan Schumaker int nfs_show_stats(struct seq_file *, struct dentry *); 401fbdefd64SBryan Schumaker void nfs_put_super(struct super_block *); 402fbdefd64SBryan Schumaker int nfs_remount(struct super_block *sb, int *flags, char *raw_data); 403fbdefd64SBryan Schumaker 404def6ed7eSAndy Adamson /* write.c */ 4051763da12SFred Isaman extern void nfs_pageio_init_write(struct nfs_pageio_descriptor *pgio, 4061763da12SFred Isaman struct inode *inode, int ioflags, 4071763da12SFred Isaman const struct nfs_pgio_completion_ops *compl_ops); 4086c75dc0dSFred Isaman extern struct nfs_write_header *nfs_writehdr_alloc(void); 409cd841605SFred Isaman extern void nfs_writehdr_free(struct nfs_pgio_header *hdr); 410dce81290STrond Myklebust extern int nfs_generic_flush(struct nfs_pageio_descriptor *desc, 4116c75dc0dSFred Isaman struct nfs_pgio_header *hdr); 41257208fa7SBryan Schumaker extern void nfs_pageio_init_write(struct nfs_pageio_descriptor *pgio, 413061ae2edSFred Isaman struct inode *inode, int ioflags, 414061ae2edSFred Isaman const struct nfs_pgio_completion_ops *compl_ops); 415dce81290STrond Myklebust extern void nfs_pageio_reset_write_mds(struct nfs_pageio_descriptor *pgio); 416dce81290STrond Myklebust extern void nfs_writedata_release(struct nfs_write_data *wdata); 4170b7c0153SFred Isaman extern void nfs_commit_free(struct nfs_commit_data *p); 418c5996c4eSFred Isaman extern int nfs_initiate_write(struct rpc_clnt *clnt, 419c5996c4eSFred Isaman struct nfs_write_data *data, 420a69aef14SFred Isaman const struct rpc_call_ops *call_ops, 4219f0ec176SAndy Adamson int how, int flags); 422def6ed7eSAndy Adamson extern void nfs_write_prepare(struct rpc_task *task, void *calldata); 4230b7c0153SFred Isaman extern void nfs_commit_prepare(struct rpc_task *task, void *calldata); 4240b7c0153SFred Isaman extern int nfs_initiate_commit(struct rpc_clnt *clnt, 4250b7c0153SFred Isaman struct nfs_commit_data *data, 426e0c2b380SFred Isaman const struct rpc_call_ops *call_ops, 4279f0ec176SAndy Adamson int how, int flags); 4280b7c0153SFred Isaman extern void nfs_init_commit(struct nfs_commit_data *data, 429e0c2b380SFred Isaman struct list_head *head, 430f453a54aSFred Isaman struct pnfs_layout_segment *lseg, 431f453a54aSFred Isaman struct nfs_commit_info *cinfo); 4321763da12SFred Isaman int nfs_scan_commit_list(struct list_head *src, struct list_head *dst, 4331763da12SFred Isaman struct nfs_commit_info *cinfo, int max); 4341763da12SFred Isaman int nfs_scan_commit(struct inode *inode, struct list_head *dst, 4351763da12SFred Isaman struct nfs_commit_info *cinfo); 4361763da12SFred Isaman void nfs_mark_request_commit(struct nfs_page *req, 4371763da12SFred Isaman struct pnfs_layout_segment *lseg, 4381763da12SFred Isaman struct nfs_commit_info *cinfo); 4391763da12SFred Isaman int nfs_generic_commit_list(struct inode *inode, struct list_head *head, 4401763da12SFred Isaman int how, struct nfs_commit_info *cinfo); 441e0c2b380SFred Isaman void nfs_retry_commit(struct list_head *page_list, 442ea2cf228SFred Isaman struct pnfs_layout_segment *lseg, 443ea2cf228SFred Isaman struct nfs_commit_info *cinfo); 4440b7c0153SFred Isaman void nfs_commitdata_release(struct nfs_commit_data *data); 445ea2cf228SFred Isaman void nfs_request_add_commit_list(struct nfs_page *req, struct list_head *dst, 446ea2cf228SFred Isaman struct nfs_commit_info *cinfo); 447ea2cf228SFred Isaman void nfs_request_remove_commit_list(struct nfs_page *req, 448ea2cf228SFred Isaman struct nfs_commit_info *cinfo); 449ea2cf228SFred Isaman void nfs_init_cinfo(struct nfs_commit_info *cinfo, 450ea2cf228SFred Isaman struct inode *inode, 451ea2cf228SFred Isaman struct nfs_direct_req *dreq); 452e0c2b380SFred Isaman 453074cc1deSTrond Myklebust #ifdef CONFIG_MIGRATION 454074cc1deSTrond Myklebust extern int nfs_migrate_page(struct address_space *, 455a6bc32b8SMel Gorman struct page *, struct page *, enum migrate_mode); 456074cc1deSTrond Myklebust #else 457074cc1deSTrond Myklebust #define nfs_migrate_page NULL 458074cc1deSTrond Myklebust #endif 459def6ed7eSAndy Adamson 4601763da12SFred Isaman /* direct.c */ 4611763da12SFred Isaman void nfs_init_cinfo_from_dreq(struct nfs_commit_info *cinfo, 4621763da12SFred Isaman struct nfs_direct_req *dreq); 4631d59d61fSTrond Myklebust static inline void nfs_inode_dio_wait(struct inode *inode) 4641d59d61fSTrond Myklebust { 4651d59d61fSTrond Myklebust inode_dio_wait(inode); 4661d59d61fSTrond Myklebust } 4671763da12SFred Isaman 468cccef3b9SAndy Adamson /* nfs4proc.c */ 469d20581aaSBenny Halevy extern void __nfs4_read_done_cb(struct nfs_read_data *); 4708cab4c39SChuck Lever extern struct nfs_client *nfs4_init_client(struct nfs_client *clp, 47145a52a02SAndy Adamson const struct rpc_timeout *timeparms, 47245a52a02SAndy Adamson const char *ip_addr, 4734bf590e0SChuck Lever rpc_authflavor_t authflavour); 4747c513058SBryan Schumaker extern int _nfs4_call_sync(struct rpc_clnt *clnt, 4757c513058SBryan Schumaker struct nfs_server *server, 476cccef3b9SAndy Adamson struct rpc_message *msg, 477cccef3b9SAndy Adamson struct nfs4_sequence_args *args, 478cccef3b9SAndy Adamson struct nfs4_sequence_res *res, 479cccef3b9SAndy Adamson int cache_reply); 4807c513058SBryan Schumaker extern int _nfs4_call_sync_session(struct rpc_clnt *clnt, 4817c513058SBryan Schumaker struct nfs_server *server, 482cccef3b9SAndy Adamson struct rpc_message *msg, 483cccef3b9SAndy Adamson struct nfs4_sequence_args *args, 484cccef3b9SAndy Adamson struct nfs4_sequence_res *res, 485cccef3b9SAndy Adamson int cache_reply); 486cccef3b9SAndy Adamson 487557134a3SAndy Adamson /* 488f7b422b1SDavid Howells * Determine the device name as a string 489f7b422b1SDavid Howells */ 490b514f872SAl Viro static inline char *nfs_devname(struct dentry *dentry, 491f7b422b1SDavid Howells char *buffer, ssize_t buflen) 492f7b422b1SDavid Howells { 493b514f872SAl Viro char *dummy; 494b514f872SAl Viro return nfs_path(&dummy, dentry, buffer, buflen); 495f7b422b1SDavid Howells } 496f7b422b1SDavid Howells 497f7b422b1SDavid Howells /* 498f7b422b1SDavid Howells * Determine the actual block size (and log2 thereof) 499f7b422b1SDavid Howells */ 500f7b422b1SDavid Howells static inline 501f7b422b1SDavid Howells unsigned long nfs_block_bits(unsigned long bsize, unsigned char *nrbitsp) 502f7b422b1SDavid Howells { 503f7b422b1SDavid Howells /* make sure blocksize is a power of two */ 504f7b422b1SDavid Howells if ((bsize & (bsize - 1)) || nrbitsp) { 505f7b422b1SDavid Howells unsigned char nrbits; 506f7b422b1SDavid Howells 507f7b422b1SDavid Howells for (nrbits = 31; nrbits && !(bsize & (1 << nrbits)); nrbits--) 508f7b422b1SDavid Howells ; 509f7b422b1SDavid Howells bsize = 1 << nrbits; 510f7b422b1SDavid Howells if (nrbitsp) 511f7b422b1SDavid Howells *nrbitsp = nrbits; 512f7b422b1SDavid Howells } 513f7b422b1SDavid Howells 514f7b422b1SDavid Howells return bsize; 515f7b422b1SDavid Howells } 516f7b422b1SDavid Howells 517f7b422b1SDavid Howells /* 518f7b422b1SDavid Howells * Calculate the number of 512byte blocks used. 519f7b422b1SDavid Howells */ 5209eaa67c6SChuck Lever static inline blkcnt_t nfs_calc_block_size(u64 tsize) 521f7b422b1SDavid Howells { 5229eaa67c6SChuck Lever blkcnt_t used = (tsize + 511) >> 9; 523f7b422b1SDavid Howells return (used > ULONG_MAX) ? ULONG_MAX : used; 524f7b422b1SDavid Howells } 525f7b422b1SDavid Howells 526f7b422b1SDavid Howells /* 527f7b422b1SDavid Howells * Compute and set NFS server blocksize 528f7b422b1SDavid Howells */ 529f7b422b1SDavid Howells static inline 530f7b422b1SDavid Howells unsigned long nfs_block_size(unsigned long bsize, unsigned char *nrbitsp) 531f7b422b1SDavid Howells { 532f7b422b1SDavid Howells if (bsize < NFS_MIN_FILE_IO_SIZE) 533f7b422b1SDavid Howells bsize = NFS_DEF_FILE_IO_SIZE; 534f7b422b1SDavid Howells else if (bsize >= NFS_MAX_FILE_IO_SIZE) 535f7b422b1SDavid Howells bsize = NFS_MAX_FILE_IO_SIZE; 536f7b422b1SDavid Howells 537f7b422b1SDavid Howells return nfs_block_bits(bsize, nrbitsp); 538f7b422b1SDavid Howells } 539f7b422b1SDavid Howells 540f7b422b1SDavid Howells /* 541f7b422b1SDavid Howells * Determine the maximum file size for a superblock 542f7b422b1SDavid Howells */ 543f7b422b1SDavid Howells static inline 544f7b422b1SDavid Howells void nfs_super_set_maxbytes(struct super_block *sb, __u64 maxfilesize) 545f7b422b1SDavid Howells { 546f7b422b1SDavid Howells sb->s_maxbytes = (loff_t)maxfilesize; 547f7b422b1SDavid Howells if (sb->s_maxbytes > MAX_LFS_FILESIZE || sb->s_maxbytes <= 0) 548f7b422b1SDavid Howells sb->s_maxbytes = MAX_LFS_FILESIZE; 549f7b422b1SDavid Howells } 55049a70f27STrond Myklebust 55149a70f27STrond Myklebust /* 55249a70f27STrond Myklebust * Determine the number of bytes of data the page contains 55349a70f27STrond Myklebust */ 55449a70f27STrond Myklebust static inline 55549a70f27STrond Myklebust unsigned int nfs_page_length(struct page *page) 55649a70f27STrond Myklebust { 55749a70f27STrond Myklebust loff_t i_size = i_size_read(page->mapping->host); 55849a70f27STrond Myklebust 55949a70f27STrond Myklebust if (i_size > 0) { 56049a70f27STrond Myklebust pgoff_t end_index = (i_size - 1) >> PAGE_CACHE_SHIFT; 56149a70f27STrond Myklebust if (page->index < end_index) 56249a70f27STrond Myklebust return PAGE_CACHE_SIZE; 56349a70f27STrond Myklebust if (page->index == end_index) 56449a70f27STrond Myklebust return ((i_size - 1) & ~PAGE_CACHE_MASK) + 1; 56549a70f27STrond Myklebust } 56649a70f27STrond Myklebust return 0; 56749a70f27STrond Myklebust } 5688d5658c9STrond Myklebust 5698d5658c9STrond Myklebust /* 5700b26a0bfSTrond Myklebust * Convert a umode to a dirent->d_type 5710b26a0bfSTrond Myklebust */ 5720b26a0bfSTrond Myklebust static inline 5730b26a0bfSTrond Myklebust unsigned char nfs_umode_to_dtype(umode_t mode) 5740b26a0bfSTrond Myklebust { 5750b26a0bfSTrond Myklebust return (mode >> 12) & 15; 5760b26a0bfSTrond Myklebust } 5770b26a0bfSTrond Myklebust 5780b26a0bfSTrond Myklebust /* 5798d5658c9STrond Myklebust * Determine the number of pages in an array of length 'len' and 5808d5658c9STrond Myklebust * with a base offset of 'base' 5818d5658c9STrond Myklebust */ 5828d5658c9STrond Myklebust static inline 5838d5658c9STrond Myklebust unsigned int nfs_page_array_len(unsigned int base, size_t len) 5848d5658c9STrond Myklebust { 5858d5658c9STrond Myklebust return ((unsigned long)len + (unsigned long)base + 5868d5658c9STrond Myklebust PAGE_SIZE - 1) >> PAGE_SHIFT; 5878d5658c9STrond Myklebust } 5880110ee15STrond Myklebust 5893a1556e8STrond Myklebust /* 5903a1556e8STrond Myklebust * Convert a struct timespec into a 64-bit change attribute 5913a1556e8STrond Myklebust * 5923a1556e8STrond Myklebust * This does approximately the same thing as timespec_to_ns(), 5933a1556e8STrond Myklebust * but for calculation efficiency, we multiply the seconds by 5943a1556e8STrond Myklebust * 1024*1024*1024. 5953a1556e8STrond Myklebust */ 5963a1556e8STrond Myklebust static inline 5973a1556e8STrond Myklebust u64 nfs_timespec_to_change_attr(const struct timespec *ts) 5983a1556e8STrond Myklebust { 5993a1556e8STrond Myklebust return ((u64)ts->tv_sec << 30) + ts->tv_nsec; 6003a1556e8STrond Myklebust } 601