12bad8471SEric Van Hensbergen /* 22bad8471SEric Van Hensbergen * linux/fs/9p/vfs_inode.c 32bad8471SEric Van Hensbergen * 473c592b9SEric Van Hensbergen * This file contains vfs inode ops for the 9P2000 protocol. 52bad8471SEric Van Hensbergen * 62bad8471SEric Van Hensbergen * Copyright (C) 2004 by Eric Van Hensbergen <ericvh@gmail.com> 72bad8471SEric Van Hensbergen * Copyright (C) 2002 by Ron Minnich <rminnich@lanl.gov> 82bad8471SEric Van Hensbergen * 92bad8471SEric Van Hensbergen * This program is free software; you can redistribute it and/or modify 1042e8c509SEric Van Hensbergen * it under the terms of the GNU General Public License version 2 1142e8c509SEric Van Hensbergen * as published by the Free Software Foundation. 122bad8471SEric Van Hensbergen * 132bad8471SEric Van Hensbergen * This program is distributed in the hope that it will be useful, 142bad8471SEric Van Hensbergen * but WITHOUT ANY WARRANTY; without even the implied warranty of 152bad8471SEric Van Hensbergen * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 162bad8471SEric Van Hensbergen * GNU General Public License for more details. 172bad8471SEric Van Hensbergen * 182bad8471SEric Van Hensbergen * You should have received a copy of the GNU General Public License 192bad8471SEric Van Hensbergen * along with this program; if not, write to: 202bad8471SEric Van Hensbergen * Free Software Foundation 212bad8471SEric Van Hensbergen * 51 Franklin Street, Fifth Floor 222bad8471SEric Van Hensbergen * Boston, MA 02111-1301 USA 232bad8471SEric Van Hensbergen * 242bad8471SEric Van Hensbergen */ 252bad8471SEric Van Hensbergen 265d385153SJoe Perches #define pr_fmt(fmt) KBUILD_MODNAME ": " fmt 275d385153SJoe Perches 282bad8471SEric Van Hensbergen #include <linux/module.h> 292bad8471SEric Van Hensbergen #include <linux/errno.h> 302bad8471SEric Van Hensbergen #include <linux/fs.h> 312bad8471SEric Van Hensbergen #include <linux/file.h> 322bad8471SEric Van Hensbergen #include <linux/pagemap.h> 332bad8471SEric Van Hensbergen #include <linux/stat.h> 342bad8471SEric Van Hensbergen #include <linux/string.h> 352bad8471SEric Van Hensbergen #include <linux/inet.h> 362bad8471SEric Van Hensbergen #include <linux/namei.h> 372bad8471SEric Van Hensbergen #include <linux/idr.h> 38e8edc6e0SAlexey Dobriyan #include <linux/sched.h> 395a0e3ad6STejun Heo #include <linux/slab.h> 40ebf46264SAneesh Kumar K.V #include <linux/xattr.h> 4185ff872dSAneesh Kumar K.V #include <linux/posix_acl.h> 42bd238fb4SLatchesar Ionkov #include <net/9p/9p.h> 43bd238fb4SLatchesar Ionkov #include <net/9p/client.h> 442bad8471SEric Van Hensbergen 452bad8471SEric Van Hensbergen #include "v9fs.h" 462bad8471SEric Van Hensbergen #include "v9fs_vfs.h" 472bad8471SEric Van Hensbergen #include "fid.h" 4860e78d2cSAbhishek Kulkarni #include "cache.h" 49ebf46264SAneesh Kumar K.V #include "xattr.h" 5085ff872dSAneesh Kumar K.V #include "acl.h" 512bad8471SEric Van Hensbergen 52754661f1SArjan van de Ven static const struct inode_operations v9fs_dir_inode_operations; 539b6533c9SSripathi Kodi static const struct inode_operations v9fs_dir_inode_operations_dotu; 54754661f1SArjan van de Ven static const struct inode_operations v9fs_file_inode_operations; 55754661f1SArjan van de Ven static const struct inode_operations v9fs_symlink_inode_operations; 56f5fc6145SAneesh Kumar K.V 572bad8471SEric Van Hensbergen /** 582bad8471SEric Van Hensbergen * unixmode2p9mode - convert unix mode bits to plan 9 592bad8471SEric Van Hensbergen * @v9ses: v9fs session information 602bad8471SEric Van Hensbergen * @mode: mode to convert 612bad8471SEric Van Hensbergen * 622bad8471SEric Van Hensbergen */ 632bad8471SEric Van Hensbergen 6473c592b9SEric Van Hensbergen static int unixmode2p9mode(struct v9fs_session_info *v9ses, int mode) 652bad8471SEric Van Hensbergen { 662bad8471SEric Van Hensbergen int res; 672bad8471SEric Van Hensbergen res = mode & 0777; 682bad8471SEric Van Hensbergen if (S_ISDIR(mode)) 69bd238fb4SLatchesar Ionkov res |= P9_DMDIR; 70dd6102fbSSripathi Kodi if (v9fs_proto_dotu(v9ses)) { 712bad8471SEric Van Hensbergen if (S_ISLNK(mode)) 72bd238fb4SLatchesar Ionkov res |= P9_DMSYMLINK; 732bad8471SEric Van Hensbergen if (v9ses->nodev == 0) { 742bad8471SEric Van Hensbergen if (S_ISSOCK(mode)) 75bd238fb4SLatchesar Ionkov res |= P9_DMSOCKET; 762bad8471SEric Van Hensbergen if (S_ISFIFO(mode)) 77bd238fb4SLatchesar Ionkov res |= P9_DMNAMEDPIPE; 782bad8471SEric Van Hensbergen if (S_ISBLK(mode)) 79bd238fb4SLatchesar Ionkov res |= P9_DMDEVICE; 802bad8471SEric Van Hensbergen if (S_ISCHR(mode)) 81bd238fb4SLatchesar Ionkov res |= P9_DMDEVICE; 822bad8471SEric Van Hensbergen } 832bad8471SEric Van Hensbergen 842bad8471SEric Van Hensbergen if ((mode & S_ISUID) == S_ISUID) 85bd238fb4SLatchesar Ionkov res |= P9_DMSETUID; 862bad8471SEric Van Hensbergen if ((mode & S_ISGID) == S_ISGID) 87bd238fb4SLatchesar Ionkov res |= P9_DMSETGID; 88d199d652SAnthony Liguori if ((mode & S_ISVTX) == S_ISVTX) 89d199d652SAnthony Liguori res |= P9_DMSETVTX; 90bd238fb4SLatchesar Ionkov if ((mode & P9_DMLINK)) 91bd238fb4SLatchesar Ionkov res |= P9_DMLINK; 922bad8471SEric Van Hensbergen } 932bad8471SEric Van Hensbergen 942bad8471SEric Van Hensbergen return res; 952bad8471SEric Van Hensbergen } 962bad8471SEric Van Hensbergen 972bad8471SEric Van Hensbergen /** 98df345c67SAneesh Kumar K.V * p9mode2perm- convert plan9 mode bits to unix permission bits 99df345c67SAneesh Kumar K.V * @v9ses: v9fs session information 100df345c67SAneesh Kumar K.V * @stat: p9_wstat from which mode need to be derived 101df345c67SAneesh Kumar K.V * 102df345c67SAneesh Kumar K.V */ 103df345c67SAneesh Kumar K.V static int p9mode2perm(struct v9fs_session_info *v9ses, 104df345c67SAneesh Kumar K.V struct p9_wstat *stat) 105df345c67SAneesh Kumar K.V { 106df345c67SAneesh Kumar K.V int res; 107df345c67SAneesh Kumar K.V int mode = stat->mode; 108df345c67SAneesh Kumar K.V 109df345c67SAneesh Kumar K.V res = mode & S_IALLUGO; 110df345c67SAneesh Kumar K.V if (v9fs_proto_dotu(v9ses)) { 111df345c67SAneesh Kumar K.V if ((mode & P9_DMSETUID) == P9_DMSETUID) 112df345c67SAneesh Kumar K.V res |= S_ISUID; 113df345c67SAneesh Kumar K.V 114df345c67SAneesh Kumar K.V if ((mode & P9_DMSETGID) == P9_DMSETGID) 115df345c67SAneesh Kumar K.V res |= S_ISGID; 116df345c67SAneesh Kumar K.V 117df345c67SAneesh Kumar K.V if ((mode & P9_DMSETVTX) == P9_DMSETVTX) 118df345c67SAneesh Kumar K.V res |= S_ISVTX; 119df345c67SAneesh Kumar K.V } 120df345c67SAneesh Kumar K.V return res; 121df345c67SAneesh Kumar K.V } 122df345c67SAneesh Kumar K.V 123df345c67SAneesh Kumar K.V /** 1242bad8471SEric Van Hensbergen * p9mode2unixmode- convert plan9 mode bits to unix mode bits 1252bad8471SEric Van Hensbergen * @v9ses: v9fs session information 12645089142SAneesh Kumar K.V * @stat: p9_wstat from which mode need to be derived 12745089142SAneesh Kumar K.V * @rdev: major number, minor number in case of device files. 1282bad8471SEric Van Hensbergen * 1292bad8471SEric Van Hensbergen */ 13045089142SAneesh Kumar K.V static int p9mode2unixmode(struct v9fs_session_info *v9ses, 13145089142SAneesh Kumar K.V struct p9_wstat *stat, dev_t *rdev) 1322bad8471SEric Van Hensbergen { 1332bad8471SEric Van Hensbergen int res; 13445089142SAneesh Kumar K.V int mode = stat->mode; 1352bad8471SEric Van Hensbergen 13645089142SAneesh Kumar K.V *rdev = 0; 137df345c67SAneesh Kumar K.V res = p9mode2perm(v9ses, stat); 1382bad8471SEric Van Hensbergen 139bd238fb4SLatchesar Ionkov if ((mode & P9_DMDIR) == P9_DMDIR) 1402bad8471SEric Van Hensbergen res |= S_IFDIR; 141dd6102fbSSripathi Kodi else if ((mode & P9_DMSYMLINK) && (v9fs_proto_dotu(v9ses))) 1422bad8471SEric Van Hensbergen res |= S_IFLNK; 143dd6102fbSSripathi Kodi else if ((mode & P9_DMSOCKET) && (v9fs_proto_dotu(v9ses)) 1442bad8471SEric Van Hensbergen && (v9ses->nodev == 0)) 1452bad8471SEric Van Hensbergen res |= S_IFSOCK; 146dd6102fbSSripathi Kodi else if ((mode & P9_DMNAMEDPIPE) && (v9fs_proto_dotu(v9ses)) 1472bad8471SEric Van Hensbergen && (v9ses->nodev == 0)) 1482bad8471SEric Van Hensbergen res |= S_IFIFO; 149dd6102fbSSripathi Kodi else if ((mode & P9_DMDEVICE) && (v9fs_proto_dotu(v9ses)) 15045089142SAneesh Kumar K.V && (v9ses->nodev == 0)) { 15145089142SAneesh Kumar K.V char type = 0, ext[32]; 15245089142SAneesh Kumar K.V int major = -1, minor = -1; 15345089142SAneesh Kumar K.V 15445089142SAneesh Kumar K.V strncpy(ext, stat->extension, sizeof(ext)); 15545089142SAneesh Kumar K.V sscanf(ext, "%c %u %u", &type, &major, &minor); 15645089142SAneesh Kumar K.V switch (type) { 15745089142SAneesh Kumar K.V case 'c': 15845089142SAneesh Kumar K.V res |= S_IFCHR; 15945089142SAneesh Kumar K.V break; 16045089142SAneesh Kumar K.V case 'b': 1612bad8471SEric Van Hensbergen res |= S_IFBLK; 16245089142SAneesh Kumar K.V break; 16345089142SAneesh Kumar K.V default: 1645d385153SJoe Perches p9_debug(P9_DEBUG_ERROR, "Unknown special type %c %s\n", 1655d385153SJoe Perches type, stat->extension); 16645089142SAneesh Kumar K.V }; 16745089142SAneesh Kumar K.V *rdev = MKDEV(major, minor); 16845089142SAneesh Kumar K.V } else 1692bad8471SEric Van Hensbergen res |= S_IFREG; 1702bad8471SEric Van Hensbergen 1712bad8471SEric Van Hensbergen return res; 1722bad8471SEric Van Hensbergen } 1732bad8471SEric Van Hensbergen 174ee443996SEric Van Hensbergen /** 175ee443996SEric Van Hensbergen * v9fs_uflags2omode- convert posix open flags to plan 9 mode bits 176ee443996SEric Van Hensbergen * @uflags: flags to convert 1772e4bef41SEric Van Hensbergen * @extended: if .u extensions are active 178ee443996SEric Van Hensbergen */ 179ee443996SEric Van Hensbergen 1802e4bef41SEric Van Hensbergen int v9fs_uflags2omode(int uflags, int extended) 1816a3124a3SLatchesar Ionkov { 1826a3124a3SLatchesar Ionkov int ret; 1836a3124a3SLatchesar Ionkov 1846a3124a3SLatchesar Ionkov ret = 0; 1856a3124a3SLatchesar Ionkov switch (uflags&3) { 1866a3124a3SLatchesar Ionkov default: 1876a3124a3SLatchesar Ionkov case O_RDONLY: 188bd238fb4SLatchesar Ionkov ret = P9_OREAD; 1896a3124a3SLatchesar Ionkov break; 1906a3124a3SLatchesar Ionkov 1916a3124a3SLatchesar Ionkov case O_WRONLY: 192bd238fb4SLatchesar Ionkov ret = P9_OWRITE; 1936a3124a3SLatchesar Ionkov break; 1946a3124a3SLatchesar Ionkov 1956a3124a3SLatchesar Ionkov case O_RDWR: 196bd238fb4SLatchesar Ionkov ret = P9_ORDWR; 1976a3124a3SLatchesar Ionkov break; 1986a3124a3SLatchesar Ionkov } 1996a3124a3SLatchesar Ionkov 2006a3124a3SLatchesar Ionkov if (uflags & O_TRUNC) 201bd238fb4SLatchesar Ionkov ret |= P9_OTRUNC; 2026a3124a3SLatchesar Ionkov 2032e4bef41SEric Van Hensbergen if (extended) { 2042e4bef41SEric Van Hensbergen if (uflags & O_EXCL) 2052e4bef41SEric Van Hensbergen ret |= P9_OEXCL; 2062e4bef41SEric Van Hensbergen 2076a3124a3SLatchesar Ionkov if (uflags & O_APPEND) 208bd238fb4SLatchesar Ionkov ret |= P9_OAPPEND; 2092e4bef41SEric Van Hensbergen } 2106a3124a3SLatchesar Ionkov 2116a3124a3SLatchesar Ionkov return ret; 2126a3124a3SLatchesar Ionkov } 2136a3124a3SLatchesar Ionkov 2142bad8471SEric Van Hensbergen /** 215531b1094SLatchesar Ionkov * v9fs_blank_wstat - helper function to setup a 9P stat structure 216531b1094SLatchesar Ionkov * @wstat: structure to initialize 2172bad8471SEric Van Hensbergen * 2182bad8471SEric Van Hensbergen */ 2192bad8471SEric Van Hensbergen 2207a4439c4SM. Mohan Kumar void 221bd238fb4SLatchesar Ionkov v9fs_blank_wstat(struct p9_wstat *wstat) 2222bad8471SEric Van Hensbergen { 223531b1094SLatchesar Ionkov wstat->type = ~0; 224531b1094SLatchesar Ionkov wstat->dev = ~0; 225531b1094SLatchesar Ionkov wstat->qid.type = ~0; 226531b1094SLatchesar Ionkov wstat->qid.version = ~0; 227531b1094SLatchesar Ionkov *((long long *)&wstat->qid.path) = ~0; 228531b1094SLatchesar Ionkov wstat->mode = ~0; 229531b1094SLatchesar Ionkov wstat->atime = ~0; 230531b1094SLatchesar Ionkov wstat->mtime = ~0; 231531b1094SLatchesar Ionkov wstat->length = ~0; 232531b1094SLatchesar Ionkov wstat->name = NULL; 233531b1094SLatchesar Ionkov wstat->uid = NULL; 234531b1094SLatchesar Ionkov wstat->gid = NULL; 235531b1094SLatchesar Ionkov wstat->muid = NULL; 236531b1094SLatchesar Ionkov wstat->n_uid = ~0; 237531b1094SLatchesar Ionkov wstat->n_gid = ~0; 238531b1094SLatchesar Ionkov wstat->n_muid = ~0; 239531b1094SLatchesar Ionkov wstat->extension = NULL; 2402bad8471SEric Van Hensbergen } 2412bad8471SEric Van Hensbergen 24260e78d2cSAbhishek Kulkarni /** 24360e78d2cSAbhishek Kulkarni * v9fs_alloc_inode - helper function to allocate an inode 24460e78d2cSAbhishek Kulkarni * 24560e78d2cSAbhishek Kulkarni */ 24660e78d2cSAbhishek Kulkarni struct inode *v9fs_alloc_inode(struct super_block *sb) 24760e78d2cSAbhishek Kulkarni { 248a78ce05dSAneesh Kumar K.V struct v9fs_inode *v9inode; 249a78ce05dSAneesh Kumar K.V v9inode = (struct v9fs_inode *)kmem_cache_alloc(v9fs_inode_cache, 25060e78d2cSAbhishek Kulkarni GFP_KERNEL); 251a78ce05dSAneesh Kumar K.V if (!v9inode) 25260e78d2cSAbhishek Kulkarni return NULL; 253a78ce05dSAneesh Kumar K.V #ifdef CONFIG_9P_FSCACHE 254a78ce05dSAneesh Kumar K.V v9inode->fscache = NULL; 255a78ce05dSAneesh Kumar K.V spin_lock_init(&v9inode->fscache_lock); 256a78ce05dSAneesh Kumar K.V #endif 2576b39f6d2SAneesh Kumar K.V v9inode->writeback_fid = NULL; 258b3cbea03SAneesh Kumar K.V v9inode->cache_validity = 0; 2595a7e0a8cSAneesh Kumar K.V mutex_init(&v9inode->v_mutex); 260a78ce05dSAneesh Kumar K.V return &v9inode->vfs_inode; 26160e78d2cSAbhishek Kulkarni } 26260e78d2cSAbhishek Kulkarni 26360e78d2cSAbhishek Kulkarni /** 26460e78d2cSAbhishek Kulkarni * v9fs_destroy_inode - destroy an inode 26560e78d2cSAbhishek Kulkarni * 26660e78d2cSAbhishek Kulkarni */ 26760e78d2cSAbhishek Kulkarni 268fa0d7e3dSNick Piggin static void v9fs_i_callback(struct rcu_head *head) 269fa0d7e3dSNick Piggin { 270fa0d7e3dSNick Piggin struct inode *inode = container_of(head, struct inode, i_rcu); 271fa0d7e3dSNick Piggin INIT_LIST_HEAD(&inode->i_dentry); 272a78ce05dSAneesh Kumar K.V kmem_cache_free(v9fs_inode_cache, V9FS_I(inode)); 273fa0d7e3dSNick Piggin } 274fa0d7e3dSNick Piggin 27560e78d2cSAbhishek Kulkarni void v9fs_destroy_inode(struct inode *inode) 27660e78d2cSAbhishek Kulkarni { 277fa0d7e3dSNick Piggin call_rcu(&inode->i_rcu, v9fs_i_callback); 27860e78d2cSAbhishek Kulkarni } 27960e78d2cSAbhishek Kulkarni 2805ffc0cb3SAneesh Kumar K.V int v9fs_init_inode(struct v9fs_session_info *v9ses, 28145089142SAneesh Kumar K.V struct inode *inode, int mode, dev_t rdev) 2822bad8471SEric Van Hensbergen { 2835ffc0cb3SAneesh Kumar K.V int err = 0; 2842bb54115SAbhishek Kulkarni 285217f206dSDmitry Monakhov inode_init_owner(inode, NULL, mode); 2862bad8471SEric Van Hensbergen inode->i_blocks = 0; 28745089142SAneesh Kumar K.V inode->i_rdev = rdev; 2882bad8471SEric Van Hensbergen inode->i_atime = inode->i_mtime = inode->i_ctime = CURRENT_TIME; 289147b31cfSEric Van Hensbergen inode->i_mapping->a_ops = &v9fs_addr_operations; 2902bad8471SEric Van Hensbergen 2912bad8471SEric Van Hensbergen switch (mode & S_IFMT) { 2922bad8471SEric Van Hensbergen case S_IFIFO: 2932bad8471SEric Van Hensbergen case S_IFBLK: 2942bad8471SEric Van Hensbergen case S_IFCHR: 2952bad8471SEric Van Hensbergen case S_IFSOCK: 2964b43516aSM. Mohan Kumar if (v9fs_proto_dotl(v9ses)) { 2974b43516aSM. Mohan Kumar inode->i_op = &v9fs_file_inode_operations_dotl; 2984b43516aSM. Mohan Kumar } else if (v9fs_proto_dotu(v9ses)) { 2994b43516aSM. Mohan Kumar inode->i_op = &v9fs_file_inode_operations; 3004b43516aSM. Mohan Kumar } else { 3015d385153SJoe Perches p9_debug(P9_DEBUG_ERROR, 302bd238fb4SLatchesar Ionkov "special files without extended mode\n"); 3032bb54115SAbhishek Kulkarni err = -EINVAL; 3042bb54115SAbhishek Kulkarni goto error; 305b501611aSEric Van Hensbergen } 3062bb54115SAbhishek Kulkarni init_special_inode(inode, inode->i_mode, inode->i_rdev); 3075d58bec5SEric Van Hensbergen break; 3082bad8471SEric Van Hensbergen case S_IFREG: 3099b6533c9SSripathi Kodi if (v9fs_proto_dotl(v9ses)) { 3109b6533c9SSripathi Kodi inode->i_op = &v9fs_file_inode_operations_dotl; 31129236f4eSAneesh Kumar K.V if (v9ses->cache) 31229236f4eSAneesh Kumar K.V inode->i_fop = 31329236f4eSAneesh Kumar K.V &v9fs_cached_file_operations_dotl; 31429236f4eSAneesh Kumar K.V else 3159b6533c9SSripathi Kodi inode->i_fop = &v9fs_file_operations_dotl; 3169b6533c9SSripathi Kodi } else { 3172bad8471SEric Van Hensbergen inode->i_op = &v9fs_file_inode_operations; 31829236f4eSAneesh Kumar K.V if (v9ses->cache) 31929236f4eSAneesh Kumar K.V inode->i_fop = &v9fs_cached_file_operations; 32029236f4eSAneesh Kumar K.V else 3212bad8471SEric Van Hensbergen inode->i_fop = &v9fs_file_operations; 3229b6533c9SSripathi Kodi } 3239b6533c9SSripathi Kodi 3242bad8471SEric Van Hensbergen break; 325b501611aSEric Van Hensbergen case S_IFLNK: 3269b6533c9SSripathi Kodi if (!v9fs_proto_dotu(v9ses) && !v9fs_proto_dotl(v9ses)) { 3275d385153SJoe Perches p9_debug(P9_DEBUG_ERROR, 3285d385153SJoe Perches "extended modes used with legacy protocol\n"); 3292bb54115SAbhishek Kulkarni err = -EINVAL; 3302bb54115SAbhishek Kulkarni goto error; 331b501611aSEric Van Hensbergen } 3329b6533c9SSripathi Kodi 3339b6533c9SSripathi Kodi if (v9fs_proto_dotl(v9ses)) 3349b6533c9SSripathi Kodi inode->i_op = &v9fs_symlink_inode_operations_dotl; 3359b6533c9SSripathi Kodi else 336b501611aSEric Van Hensbergen inode->i_op = &v9fs_symlink_inode_operations; 3379b6533c9SSripathi Kodi 338b501611aSEric Van Hensbergen break; 3392bad8471SEric Van Hensbergen case S_IFDIR: 340d8c76e6fSDave Hansen inc_nlink(inode); 3419b6533c9SSripathi Kodi if (v9fs_proto_dotl(v9ses)) 3429b6533c9SSripathi Kodi inode->i_op = &v9fs_dir_inode_operations_dotl; 3439b6533c9SSripathi Kodi else if (v9fs_proto_dotu(v9ses)) 3449b6533c9SSripathi Kodi inode->i_op = &v9fs_dir_inode_operations_dotu; 345b501611aSEric Van Hensbergen else 3462bad8471SEric Van Hensbergen inode->i_op = &v9fs_dir_inode_operations; 3479b6533c9SSripathi Kodi 3489b6533c9SSripathi Kodi if (v9fs_proto_dotl(v9ses)) 3499b6533c9SSripathi Kodi inode->i_fop = &v9fs_dir_operations_dotl; 3509b6533c9SSripathi Kodi else 3512bad8471SEric Van Hensbergen inode->i_fop = &v9fs_dir_operations; 3529b6533c9SSripathi Kodi 3532bad8471SEric Van Hensbergen break; 3542bad8471SEric Van Hensbergen default: 3555d385153SJoe Perches p9_debug(P9_DEBUG_ERROR, "BAD mode 0x%x S_IFMT 0x%x\n", 3562bad8471SEric Van Hensbergen mode, mode & S_IFMT); 3572bb54115SAbhishek Kulkarni err = -EINVAL; 3582bb54115SAbhishek Kulkarni goto error; 3592bad8471SEric Van Hensbergen } 3602bb54115SAbhishek Kulkarni error: 3615ffc0cb3SAneesh Kumar K.V return err; 3625ffc0cb3SAneesh Kumar K.V 3635ffc0cb3SAneesh Kumar K.V } 3645ffc0cb3SAneesh Kumar K.V 3655ffc0cb3SAneesh Kumar K.V /** 3665ffc0cb3SAneesh Kumar K.V * v9fs_get_inode - helper function to setup an inode 3675ffc0cb3SAneesh Kumar K.V * @sb: superblock 3685ffc0cb3SAneesh Kumar K.V * @mode: mode to setup inode with 3695ffc0cb3SAneesh Kumar K.V * 3705ffc0cb3SAneesh Kumar K.V */ 3715ffc0cb3SAneesh Kumar K.V 37245089142SAneesh Kumar K.V struct inode *v9fs_get_inode(struct super_block *sb, int mode, dev_t rdev) 3735ffc0cb3SAneesh Kumar K.V { 3745ffc0cb3SAneesh Kumar K.V int err; 3755ffc0cb3SAneesh Kumar K.V struct inode *inode; 3765ffc0cb3SAneesh Kumar K.V struct v9fs_session_info *v9ses = sb->s_fs_info; 3775ffc0cb3SAneesh Kumar K.V 3785d385153SJoe Perches p9_debug(P9_DEBUG_VFS, "super block: %p mode: %o\n", sb, mode); 3795ffc0cb3SAneesh Kumar K.V 3805ffc0cb3SAneesh Kumar K.V inode = new_inode(sb); 3815ffc0cb3SAneesh Kumar K.V if (!inode) { 3825d385153SJoe Perches pr_warn("%s (%d): Problem allocating inode\n", 3835d385153SJoe Perches __func__, task_pid_nr(current)); 3845ffc0cb3SAneesh Kumar K.V return ERR_PTR(-ENOMEM); 3855ffc0cb3SAneesh Kumar K.V } 38645089142SAneesh Kumar K.V err = v9fs_init_inode(v9ses, inode, mode, rdev); 3875ffc0cb3SAneesh Kumar K.V if (err) { 3882bb54115SAbhishek Kulkarni iput(inode); 3892bb54115SAbhishek Kulkarni return ERR_PTR(err); 3902bad8471SEric Van Hensbergen } 3915ffc0cb3SAneesh Kumar K.V return inode; 3925ffc0cb3SAneesh Kumar K.V } 3932bad8471SEric Van Hensbergen 394bd238fb4SLatchesar Ionkov /* 3956a3124a3SLatchesar Ionkov static struct v9fs_fid* 3966a3124a3SLatchesar Ionkov v9fs_clone_walk(struct v9fs_session_info *v9ses, u32 fid, struct dentry *dentry) 3976a3124a3SLatchesar Ionkov { 3986a3124a3SLatchesar Ionkov int err; 399736c4b85SMika Kukkonen int nfid; 4006a3124a3SLatchesar Ionkov struct v9fs_fid *ret; 4016a3124a3SLatchesar Ionkov struct v9fs_fcall *fcall; 4020b8dd177SLatchesar Ionkov 4036a3124a3SLatchesar Ionkov nfid = v9fs_get_idpool(&v9ses->fidpool); 4046a3124a3SLatchesar Ionkov if (nfid < 0) { 4050b8dd177SLatchesar Ionkov eprintk(KERN_WARNING, "no free fids available\n"); 406731805b4SLatchesar Ionkov return ERR_PTR(-ENOSPC); 4070b8dd177SLatchesar Ionkov } 4080b8dd177SLatchesar Ionkov 4096a3124a3SLatchesar Ionkov err = v9fs_t_walk(v9ses, fid, nfid, (char *) dentry->d_name.name, 4106a3124a3SLatchesar Ionkov &fcall); 4116a3124a3SLatchesar Ionkov 4126a3124a3SLatchesar Ionkov if (err < 0) { 41341e5a6acSLatchesar Ionkov if (fcall && fcall->id == RWALK) 41441e5a6acSLatchesar Ionkov goto clunk_fid; 41541e5a6acSLatchesar Ionkov 4166a3124a3SLatchesar Ionkov PRINT_FCALL_ERROR("walk error", fcall); 4176a3124a3SLatchesar Ionkov v9fs_put_idpool(nfid, &v9ses->fidpool); 4186a3124a3SLatchesar Ionkov goto error; 4190b8dd177SLatchesar Ionkov } 4206a3124a3SLatchesar Ionkov 4213cf6429aSLatchesar Ionkov kfree(fcall); 4223cf6429aSLatchesar Ionkov fcall = NULL; 4236a3124a3SLatchesar Ionkov ret = v9fs_fid_create(v9ses, nfid); 4246a3124a3SLatchesar Ionkov if (!ret) { 4256a3124a3SLatchesar Ionkov err = -ENOMEM; 4266a3124a3SLatchesar Ionkov goto clunk_fid; 4270b8dd177SLatchesar Ionkov } 4282bad8471SEric Van Hensbergen 4296a3124a3SLatchesar Ionkov err = v9fs_fid_insert(ret, dentry); 4306a3124a3SLatchesar Ionkov if (err < 0) { 4316a3124a3SLatchesar Ionkov v9fs_fid_destroy(ret); 4326a3124a3SLatchesar Ionkov goto clunk_fid; 4336a3124a3SLatchesar Ionkov } 4342bad8471SEric Van Hensbergen 4356a3124a3SLatchesar Ionkov return ret; 4366a3124a3SLatchesar Ionkov 4376a3124a3SLatchesar Ionkov clunk_fid: 4386a3124a3SLatchesar Ionkov v9fs_t_clunk(v9ses, nfid); 4396a3124a3SLatchesar Ionkov 4406a3124a3SLatchesar Ionkov error: 4416a3124a3SLatchesar Ionkov kfree(fcall); 4426a3124a3SLatchesar Ionkov return ERR_PTR(err); 4436a3124a3SLatchesar Ionkov } 444bd238fb4SLatchesar Ionkov */ 4456a3124a3SLatchesar Ionkov 44660e78d2cSAbhishek Kulkarni 44760e78d2cSAbhishek Kulkarni /** 44860e78d2cSAbhishek Kulkarni * v9fs_clear_inode - release an inode 44960e78d2cSAbhishek Kulkarni * @inode: inode to release 45060e78d2cSAbhishek Kulkarni * 45160e78d2cSAbhishek Kulkarni */ 452b57922d9SAl Viro void v9fs_evict_inode(struct inode *inode) 45360e78d2cSAbhishek Kulkarni { 4546b39f6d2SAneesh Kumar K.V struct v9fs_inode *v9inode = V9FS_I(inode); 4556b39f6d2SAneesh Kumar K.V 456b57922d9SAl Viro truncate_inode_pages(inode->i_mapping, 0); 457b57922d9SAl Viro end_writeback(inode); 45860e78d2cSAbhishek Kulkarni filemap_fdatawrite(inode->i_mapping); 45960e78d2cSAbhishek Kulkarni 46060e78d2cSAbhishek Kulkarni #ifdef CONFIG_9P_FSCACHE 46160e78d2cSAbhishek Kulkarni v9fs_cache_inode_put_cookie(inode); 46260e78d2cSAbhishek Kulkarni #endif 4636b39f6d2SAneesh Kumar K.V /* clunk the fid stashed in writeback_fid */ 4646b39f6d2SAneesh Kumar K.V if (v9inode->writeback_fid) { 4656b39f6d2SAneesh Kumar K.V p9_client_clunk(v9inode->writeback_fid); 4666b39f6d2SAneesh Kumar K.V v9inode->writeback_fid = NULL; 4673cf387d7SAneesh Kumar K.V } 46860e78d2cSAbhishek Kulkarni } 46960e78d2cSAbhishek Kulkarni 470fd2421f5SAneesh Kumar K.V static int v9fs_test_inode(struct inode *inode, void *data) 471fd2421f5SAneesh Kumar K.V { 472fd2421f5SAneesh Kumar K.V int umode; 47345089142SAneesh Kumar K.V dev_t rdev; 474fd2421f5SAneesh Kumar K.V struct v9fs_inode *v9inode = V9FS_I(inode); 475fd2421f5SAneesh Kumar K.V struct p9_wstat *st = (struct p9_wstat *)data; 476fd2421f5SAneesh Kumar K.V struct v9fs_session_info *v9ses = v9fs_inode2v9ses(inode); 477fd2421f5SAneesh Kumar K.V 47845089142SAneesh Kumar K.V umode = p9mode2unixmode(v9ses, st, &rdev); 479fd2421f5SAneesh Kumar K.V /* don't match inode of different type */ 480fd2421f5SAneesh Kumar K.V if ((inode->i_mode & S_IFMT) != (umode & S_IFMT)) 481fd2421f5SAneesh Kumar K.V return 0; 482fd2421f5SAneesh Kumar K.V 483fd2421f5SAneesh Kumar K.V /* compare qid details */ 484fd2421f5SAneesh Kumar K.V if (memcmp(&v9inode->qid.version, 485fd2421f5SAneesh Kumar K.V &st->qid.version, sizeof(v9inode->qid.version))) 486fd2421f5SAneesh Kumar K.V return 0; 487fd2421f5SAneesh Kumar K.V 488fd2421f5SAneesh Kumar K.V if (v9inode->qid.type != st->qid.type) 489fd2421f5SAneesh Kumar K.V return 0; 490fd2421f5SAneesh Kumar K.V return 1; 491fd2421f5SAneesh Kumar K.V } 492fd2421f5SAneesh Kumar K.V 493ed80fcfaSAneesh Kumar K.V static int v9fs_test_new_inode(struct inode *inode, void *data) 494ed80fcfaSAneesh Kumar K.V { 495ed80fcfaSAneesh Kumar K.V return 0; 496ed80fcfaSAneesh Kumar K.V } 497ed80fcfaSAneesh Kumar K.V 498fd2421f5SAneesh Kumar K.V static int v9fs_set_inode(struct inode *inode, void *data) 499fd2421f5SAneesh Kumar K.V { 500fd2421f5SAneesh Kumar K.V struct v9fs_inode *v9inode = V9FS_I(inode); 501fd2421f5SAneesh Kumar K.V struct p9_wstat *st = (struct p9_wstat *)data; 502fd2421f5SAneesh Kumar K.V 503fd2421f5SAneesh Kumar K.V memcpy(&v9inode->qid, &st->qid, sizeof(st->qid)); 504fd2421f5SAneesh Kumar K.V return 0; 505fd2421f5SAneesh Kumar K.V } 506fd2421f5SAneesh Kumar K.V 5075ffc0cb3SAneesh Kumar K.V static struct inode *v9fs_qid_iget(struct super_block *sb, 5085ffc0cb3SAneesh Kumar K.V struct p9_qid *qid, 509ed80fcfaSAneesh Kumar K.V struct p9_wstat *st, 510ed80fcfaSAneesh Kumar K.V int new) 5115ffc0cb3SAneesh Kumar K.V { 51245089142SAneesh Kumar K.V dev_t rdev; 5135ffc0cb3SAneesh Kumar K.V int retval, umode; 5145ffc0cb3SAneesh Kumar K.V unsigned long i_ino; 5155ffc0cb3SAneesh Kumar K.V struct inode *inode; 5165ffc0cb3SAneesh Kumar K.V struct v9fs_session_info *v9ses = sb->s_fs_info; 517ed80fcfaSAneesh Kumar K.V int (*test)(struct inode *, void *); 518ed80fcfaSAneesh Kumar K.V 519ed80fcfaSAneesh Kumar K.V if (new) 520ed80fcfaSAneesh Kumar K.V test = v9fs_test_new_inode; 521ed80fcfaSAneesh Kumar K.V else 522ed80fcfaSAneesh Kumar K.V test = v9fs_test_inode; 5235ffc0cb3SAneesh Kumar K.V 5245ffc0cb3SAneesh Kumar K.V i_ino = v9fs_qid2ino(qid); 525ed80fcfaSAneesh Kumar K.V inode = iget5_locked(sb, i_ino, test, v9fs_set_inode, st); 5265ffc0cb3SAneesh Kumar K.V if (!inode) 5275ffc0cb3SAneesh Kumar K.V return ERR_PTR(-ENOMEM); 5285ffc0cb3SAneesh Kumar K.V if (!(inode->i_state & I_NEW)) 5295ffc0cb3SAneesh Kumar K.V return inode; 5305ffc0cb3SAneesh Kumar K.V /* 5315ffc0cb3SAneesh Kumar K.V * initialize the inode with the stat info 5325ffc0cb3SAneesh Kumar K.V * FIXME!! we may need support for stale inodes 5335ffc0cb3SAneesh Kumar K.V * later. 5345ffc0cb3SAneesh Kumar K.V */ 535fd2421f5SAneesh Kumar K.V inode->i_ino = i_ino; 53645089142SAneesh Kumar K.V umode = p9mode2unixmode(v9ses, st, &rdev); 53745089142SAneesh Kumar K.V retval = v9fs_init_inode(v9ses, inode, umode, rdev); 5385ffc0cb3SAneesh Kumar K.V if (retval) 5395ffc0cb3SAneesh Kumar K.V goto error; 5405ffc0cb3SAneesh Kumar K.V 5415ffc0cb3SAneesh Kumar K.V v9fs_stat2inode(st, inode, sb); 5425ffc0cb3SAneesh Kumar K.V #ifdef CONFIG_9P_FSCACHE 5435ffc0cb3SAneesh Kumar K.V v9fs_cache_inode_get_cookie(inode); 5445ffc0cb3SAneesh Kumar K.V #endif 5455ffc0cb3SAneesh Kumar K.V unlock_new_inode(inode); 5465ffc0cb3SAneesh Kumar K.V return inode; 5475ffc0cb3SAneesh Kumar K.V error: 5485ffc0cb3SAneesh Kumar K.V unlock_new_inode(inode); 5495ffc0cb3SAneesh Kumar K.V iput(inode); 5505ffc0cb3SAneesh Kumar K.V return ERR_PTR(retval); 5515ffc0cb3SAneesh Kumar K.V 5525ffc0cb3SAneesh Kumar K.V } 5535ffc0cb3SAneesh Kumar K.V 55453c06f4eSAneesh Kumar K.V struct inode * 555a78ce05dSAneesh Kumar K.V v9fs_inode_from_fid(struct v9fs_session_info *v9ses, struct p9_fid *fid, 556ed80fcfaSAneesh Kumar K.V struct super_block *sb, int new) 5576a3124a3SLatchesar Ionkov { 55851a87c55SEric Van Hensbergen struct p9_wstat *st; 5595ffc0cb3SAneesh Kumar K.V struct inode *inode = NULL; 5606a3124a3SLatchesar Ionkov 561bd238fb4SLatchesar Ionkov st = p9_client_stat(fid); 56202bc3567SAbhishek Kulkarni if (IS_ERR(st)) 56302bc3567SAbhishek Kulkarni return ERR_CAST(st); 5642bad8471SEric Van Hensbergen 565ed80fcfaSAneesh Kumar K.V inode = v9fs_qid_iget(sb, &st->qid, st, new); 56602bc3567SAbhishek Kulkarni p9stat_free(st); 567bd238fb4SLatchesar Ionkov kfree(st); 5685ffc0cb3SAneesh Kumar K.V return inode; 5692bad8471SEric Van Hensbergen } 5702bad8471SEric Van Hensbergen 5712bad8471SEric Van Hensbergen /** 572f88657ceSAneesh Kumar K.V * v9fs_at_to_dotl_flags- convert Linux specific AT flags to 573f88657ceSAneesh Kumar K.V * plan 9 AT flag. 574f88657ceSAneesh Kumar K.V * @flags: flags to convert 575f88657ceSAneesh Kumar K.V */ 576f88657ceSAneesh Kumar K.V static int v9fs_at_to_dotl_flags(int flags) 577f88657ceSAneesh Kumar K.V { 578f88657ceSAneesh Kumar K.V int rflags = 0; 579f88657ceSAneesh Kumar K.V if (flags & AT_REMOVEDIR) 580f88657ceSAneesh Kumar K.V rflags |= P9_DOTL_AT_REMOVEDIR; 581f88657ceSAneesh Kumar K.V return rflags; 582f88657ceSAneesh Kumar K.V } 583f88657ceSAneesh Kumar K.V 584f88657ceSAneesh Kumar K.V /** 5852bad8471SEric Van Hensbergen * v9fs_remove - helper function to remove files and directories 58673c592b9SEric Van Hensbergen * @dir: directory inode that is being deleted 58748e370ffSAneesh Kumar K.V * @dentry: dentry that is being deleted 58873c592b9SEric Van Hensbergen * @rmdir: removing a directory 5892bad8471SEric Van Hensbergen * 5902bad8471SEric Van Hensbergen */ 5912bad8471SEric Van Hensbergen 59248e370ffSAneesh Kumar K.V static int v9fs_remove(struct inode *dir, struct dentry *dentry, int flags) 5932bad8471SEric Van Hensbergen { 59448e370ffSAneesh Kumar K.V struct inode *inode; 59548e370ffSAneesh Kumar K.V int retval = -EOPNOTSUPP; 59648e370ffSAneesh Kumar K.V struct p9_fid *v9fid, *dfid; 59748e370ffSAneesh Kumar K.V struct v9fs_session_info *v9ses; 5982bad8471SEric Van Hensbergen 5995d385153SJoe Perches p9_debug(P9_DEBUG_VFS, "inode: %p dentry: %p rmdir: %x\n", 60048e370ffSAneesh Kumar K.V dir, dentry, flags); 6012bad8471SEric Van Hensbergen 60248e370ffSAneesh Kumar K.V v9ses = v9fs_inode2v9ses(dir); 60348e370ffSAneesh Kumar K.V inode = dentry->d_inode; 60448e370ffSAneesh Kumar K.V dfid = v9fs_fid_lookup(dentry->d_parent); 60548e370ffSAneesh Kumar K.V if (IS_ERR(dfid)) { 60648e370ffSAneesh Kumar K.V retval = PTR_ERR(dfid); 6075d385153SJoe Perches p9_debug(P9_DEBUG_VFS, "fid lookup failed %d\n", retval); 60848e370ffSAneesh Kumar K.V return retval; 60948e370ffSAneesh Kumar K.V } 61048e370ffSAneesh Kumar K.V if (v9fs_proto_dotl(v9ses)) 611f88657ceSAneesh Kumar K.V retval = p9_client_unlinkat(dfid, dentry->d_name.name, 612f88657ceSAneesh Kumar K.V v9fs_at_to_dotl_flags(flags)); 61348e370ffSAneesh Kumar K.V if (retval == -EOPNOTSUPP) { 61448e370ffSAneesh Kumar K.V /* Try the one based on path */ 61548e370ffSAneesh Kumar K.V v9fid = v9fs_fid_clone(dentry); 616da977b2cSEric Van Hensbergen if (IS_ERR(v9fid)) 617da977b2cSEric Van Hensbergen return PTR_ERR(v9fid); 618d994f405SAneesh Kumar K.V retval = p9_client_remove(v9fid); 61948e370ffSAneesh Kumar K.V } 620b271ec47SAneesh Kumar K.V if (!retval) { 621b271ec47SAneesh Kumar K.V /* 622b271ec47SAneesh Kumar K.V * directories on unlink should have zero 623b271ec47SAneesh Kumar K.V * link count 624b271ec47SAneesh Kumar K.V */ 62548e370ffSAneesh Kumar K.V if (flags & AT_REMOVEDIR) { 62648e370ffSAneesh Kumar K.V clear_nlink(inode); 627b271ec47SAneesh Kumar K.V drop_nlink(dir); 628b271ec47SAneesh Kumar K.V } else 62948e370ffSAneesh Kumar K.V drop_nlink(inode); 630d28c61f0SAneesh Kumar K.V 63148e370ffSAneesh Kumar K.V v9fs_invalidate_inode_attr(inode); 632d28c61f0SAneesh Kumar K.V v9fs_invalidate_inode_attr(dir); 633b271ec47SAneesh Kumar K.V } 634d994f405SAneesh Kumar K.V return retval; 6352bad8471SEric Van Hensbergen } 6362bad8471SEric Van Hensbergen 637bd238fb4SLatchesar Ionkov /** 638bd238fb4SLatchesar Ionkov * v9fs_create - Create a file 639ee443996SEric Van Hensbergen * @v9ses: session information 640ee443996SEric Van Hensbergen * @dir: directory that dentry is being created in 641bd238fb4SLatchesar Ionkov * @dentry: dentry that is being created 6420e15597eSAbhishek Kulkarni * @extension: 9p2000.u extension string to support devices, etc. 643bd238fb4SLatchesar Ionkov * @perm: create permissions 644bd238fb4SLatchesar Ionkov * @mode: open mode 645bd238fb4SLatchesar Ionkov * 646bd238fb4SLatchesar Ionkov */ 647bd238fb4SLatchesar Ionkov static struct p9_fid * 648bd238fb4SLatchesar Ionkov v9fs_create(struct v9fs_session_info *v9ses, struct inode *dir, 649bd238fb4SLatchesar Ionkov struct dentry *dentry, char *extension, u32 perm, u8 mode) 650bd238fb4SLatchesar Ionkov { 651bd238fb4SLatchesar Ionkov int err; 652bd238fb4SLatchesar Ionkov char *name; 653bd238fb4SLatchesar Ionkov struct p9_fid *dfid, *ofid, *fid; 654bd238fb4SLatchesar Ionkov struct inode *inode; 655bd238fb4SLatchesar Ionkov 6565d385153SJoe Perches p9_debug(P9_DEBUG_VFS, "name %s\n", dentry->d_name.name); 65751a87c55SEric Van Hensbergen 658bd238fb4SLatchesar Ionkov err = 0; 659bd238fb4SLatchesar Ionkov ofid = NULL; 660bd238fb4SLatchesar Ionkov fid = NULL; 661bd238fb4SLatchesar Ionkov name = (char *) dentry->d_name.name; 6626d27e64dSVenkateswararao Jujjuri dfid = v9fs_fid_lookup(dentry->d_parent); 663bd238fb4SLatchesar Ionkov if (IS_ERR(dfid)) { 664bd238fb4SLatchesar Ionkov err = PTR_ERR(dfid); 6655d385153SJoe Perches p9_debug(P9_DEBUG_VFS, "fid lookup failed %d\n", err); 6666d27e64dSVenkateswararao Jujjuri return ERR_PTR(err); 667bd238fb4SLatchesar Ionkov } 668bd238fb4SLatchesar Ionkov 669bd238fb4SLatchesar Ionkov /* clone a fid to use for creation */ 670bd238fb4SLatchesar Ionkov ofid = p9_client_walk(dfid, 0, NULL, 1); 671bd238fb4SLatchesar Ionkov if (IS_ERR(ofid)) { 672bd238fb4SLatchesar Ionkov err = PTR_ERR(ofid); 6735d385153SJoe Perches p9_debug(P9_DEBUG_VFS, "p9_client_walk failed %d\n", err); 6746d27e64dSVenkateswararao Jujjuri return ERR_PTR(err); 675bd238fb4SLatchesar Ionkov } 676bd238fb4SLatchesar Ionkov 677bd238fb4SLatchesar Ionkov err = p9_client_fcreate(ofid, name, perm, mode, extension); 67851a87c55SEric Van Hensbergen if (err < 0) { 6795d385153SJoe Perches p9_debug(P9_DEBUG_VFS, "p9_client_fcreate failed %d\n", err); 680bd238fb4SLatchesar Ionkov goto error; 68151a87c55SEric Van Hensbergen } 682bd238fb4SLatchesar Ionkov 683b6054793SAneesh Kumar K.V if (!(perm & P9_DMLINK)) { 684bd238fb4SLatchesar Ionkov /* now walk from the parent so we can get unopened fid */ 6856d27e64dSVenkateswararao Jujjuri fid = p9_client_walk(dfid, 1, &name, 1); 686bd238fb4SLatchesar Ionkov if (IS_ERR(fid)) { 687bd238fb4SLatchesar Ionkov err = PTR_ERR(fid); 688b6054793SAneesh Kumar K.V p9_debug(P9_DEBUG_VFS, 689b6054793SAneesh Kumar K.V "p9_client_walk failed %d\n", err); 690bd238fb4SLatchesar Ionkov fid = NULL; 691bd238fb4SLatchesar Ionkov goto error; 6926d27e64dSVenkateswararao Jujjuri } 693b6054793SAneesh Kumar K.V /* 694b6054793SAneesh Kumar K.V * instantiate inode and assign the unopened fid to the dentry 695b6054793SAneesh Kumar K.V */ 696ed80fcfaSAneesh Kumar K.V inode = v9fs_get_new_inode_from_fid(v9ses, fid, dir->i_sb); 697bd238fb4SLatchesar Ionkov if (IS_ERR(inode)) { 698bd238fb4SLatchesar Ionkov err = PTR_ERR(inode); 699b6054793SAneesh Kumar K.V p9_debug(P9_DEBUG_VFS, 700b6054793SAneesh Kumar K.V "inode creation failed %d\n", err); 701bd238fb4SLatchesar Ionkov goto error; 702bd238fb4SLatchesar Ionkov } 70350fb6d2bSAbhishek Kulkarni err = v9fs_fid_add(dentry, fid); 70450fb6d2bSAbhishek Kulkarni if (err < 0) 70550fb6d2bSAbhishek Kulkarni goto error; 7065441ae5eSAneesh Kumar K.V d_instantiate(dentry, inode); 707b6054793SAneesh Kumar K.V } 708bd238fb4SLatchesar Ionkov return ofid; 709bd238fb4SLatchesar Ionkov error: 710bd238fb4SLatchesar Ionkov if (ofid) 711bd238fb4SLatchesar Ionkov p9_client_clunk(ofid); 712bd238fb4SLatchesar Ionkov 713bd238fb4SLatchesar Ionkov if (fid) 714bd238fb4SLatchesar Ionkov p9_client_clunk(fid); 715bd238fb4SLatchesar Ionkov 716bd238fb4SLatchesar Ionkov return ERR_PTR(err); 717bd238fb4SLatchesar Ionkov } 718bd238fb4SLatchesar Ionkov 7192bad8471SEric Van Hensbergen /** 7202bad8471SEric Van Hensbergen * v9fs_vfs_create - VFS hook to create files 721ee443996SEric Van Hensbergen * @dir: directory inode that is being created 7222bad8471SEric Van Hensbergen * @dentry: dentry that is being deleted 7236a3124a3SLatchesar Ionkov * @mode: create permissions 7242bad8471SEric Van Hensbergen * @nd: path information 7252bad8471SEric Van Hensbergen * 7262bad8471SEric Van Hensbergen */ 7272bad8471SEric Van Hensbergen 7282bad8471SEric Van Hensbergen static int 7296a3124a3SLatchesar Ionkov v9fs_vfs_create(struct inode *dir, struct dentry *dentry, int mode, 7302bad8471SEric Van Hensbergen struct nameidata *nd) 7312bad8471SEric Van Hensbergen { 7326a3124a3SLatchesar Ionkov int err; 733bd238fb4SLatchesar Ionkov u32 perm; 7346a3124a3SLatchesar Ionkov int flags; 7356b39f6d2SAneesh Kumar K.V struct file *filp; 7366b39f6d2SAneesh Kumar K.V struct v9fs_inode *v9inode; 7376a3124a3SLatchesar Ionkov struct v9fs_session_info *v9ses; 7383cf387d7SAneesh Kumar K.V struct p9_fid *fid, *inode_fid; 7396a3124a3SLatchesar Ionkov 740bd238fb4SLatchesar Ionkov err = 0; 741bd238fb4SLatchesar Ionkov fid = NULL; 7426a3124a3SLatchesar Ionkov v9ses = v9fs_inode2v9ses(dir); 743da977b2cSEric Van Hensbergen perm = unixmode2p9mode(v9ses, mode); 744dd7dd556SAl Viro if (nd) 7458a5e929dSAl Viro flags = nd->intent.open.flags; 7466a3124a3SLatchesar Ionkov else 7476a3124a3SLatchesar Ionkov flags = O_RDWR; 7486a3124a3SLatchesar Ionkov 749bd238fb4SLatchesar Ionkov fid = v9fs_create(v9ses, dir, dentry, NULL, perm, 750dd6102fbSSripathi Kodi v9fs_uflags2omode(flags, 751dd6102fbSSripathi Kodi v9fs_proto_dotu(v9ses))); 752bd238fb4SLatchesar Ionkov if (IS_ERR(fid)) { 753bd238fb4SLatchesar Ionkov err = PTR_ERR(fid); 754bd238fb4SLatchesar Ionkov fid = NULL; 7556a3124a3SLatchesar Ionkov goto error; 7566a3124a3SLatchesar Ionkov } 7576a3124a3SLatchesar Ionkov 758d28c61f0SAneesh Kumar K.V v9fs_invalidate_inode_attr(dir); 759bd238fb4SLatchesar Ionkov /* if we are opening a file, assign the open fid to the file */ 760dd7dd556SAl Viro if (nd) { 7616b39f6d2SAneesh Kumar K.V v9inode = V9FS_I(dentry->d_inode); 7625a7e0a8cSAneesh Kumar K.V mutex_lock(&v9inode->v_mutex); 7637add697aSAneesh Kumar K.V if (v9ses->cache && !v9inode->writeback_fid && 7647add697aSAneesh Kumar K.V ((flags & O_ACCMODE) != O_RDONLY)) { 7653cf387d7SAneesh Kumar K.V /* 7666b39f6d2SAneesh Kumar K.V * clone a fid and add it to writeback_fid 7673cf387d7SAneesh Kumar K.V * we do it during open time instead of 7683cf387d7SAneesh Kumar K.V * page dirty time via write_begin/page_mkwrite 7693cf387d7SAneesh Kumar K.V * because we want write after unlink usecase 7703cf387d7SAneesh Kumar K.V * to work. 7713cf387d7SAneesh Kumar K.V */ 7723cf387d7SAneesh Kumar K.V inode_fid = v9fs_writeback_fid(dentry); 7733cf387d7SAneesh Kumar K.V if (IS_ERR(inode_fid)) { 7743cf387d7SAneesh Kumar K.V err = PTR_ERR(inode_fid); 7755a7e0a8cSAneesh Kumar K.V mutex_unlock(&v9inode->v_mutex); 7763cf387d7SAneesh Kumar K.V goto error; 7773cf387d7SAneesh Kumar K.V } 7786b39f6d2SAneesh Kumar K.V v9inode->writeback_fid = (void *) inode_fid; 7793cf387d7SAneesh Kumar K.V } 7805a7e0a8cSAneesh Kumar K.V mutex_unlock(&v9inode->v_mutex); 781877cb3d4SAneesh Kumar K.V filp = lookup_instantiate_filp(nd, dentry, generic_file_open); 7826a3124a3SLatchesar Ionkov if (IS_ERR(filp)) { 783bd238fb4SLatchesar Ionkov err = PTR_ERR(filp); 784bd238fb4SLatchesar Ionkov goto error; 7856a3124a3SLatchesar Ionkov } 7866a3124a3SLatchesar Ionkov 787bd238fb4SLatchesar Ionkov filp->private_data = fid; 78846848de0SAneesh Kumar K.V #ifdef CONFIG_9P_FSCACHE 78946848de0SAneesh Kumar K.V if (v9ses->cache) 79046848de0SAneesh Kumar K.V v9fs_cache_inode_set_cookie(dentry->d_inode, filp); 79146848de0SAneesh Kumar K.V #endif 792bd238fb4SLatchesar Ionkov } else 793bd238fb4SLatchesar Ionkov p9_client_clunk(fid); 7946a3124a3SLatchesar Ionkov 7956a3124a3SLatchesar Ionkov return 0; 7966a3124a3SLatchesar Ionkov 7976a3124a3SLatchesar Ionkov error: 798bd238fb4SLatchesar Ionkov if (fid) 799bd238fb4SLatchesar Ionkov p9_client_clunk(fid); 8006a3124a3SLatchesar Ionkov 8016a3124a3SLatchesar Ionkov return err; 8022bad8471SEric Van Hensbergen } 8032bad8471SEric Van Hensbergen 8042bad8471SEric Van Hensbergen /** 8052bad8471SEric Van Hensbergen * v9fs_vfs_mkdir - VFS mkdir hook to create a directory 806ee443996SEric Van Hensbergen * @dir: inode that is being unlinked 8072bad8471SEric Van Hensbergen * @dentry: dentry that is being unlinked 8082bad8471SEric Van Hensbergen * @mode: mode for new directory 8092bad8471SEric Van Hensbergen * 8102bad8471SEric Van Hensbergen */ 8112bad8471SEric Van Hensbergen 8126a3124a3SLatchesar Ionkov static int v9fs_vfs_mkdir(struct inode *dir, struct dentry *dentry, int mode) 8132bad8471SEric Van Hensbergen { 8146a3124a3SLatchesar Ionkov int err; 815bd238fb4SLatchesar Ionkov u32 perm; 816bd238fb4SLatchesar Ionkov struct p9_fid *fid; 817d28c61f0SAneesh Kumar K.V struct v9fs_session_info *v9ses; 8186a3124a3SLatchesar Ionkov 8195d385153SJoe Perches p9_debug(P9_DEBUG_VFS, "name %s\n", dentry->d_name.name); 820bd238fb4SLatchesar Ionkov err = 0; 8216a3124a3SLatchesar Ionkov v9ses = v9fs_inode2v9ses(dir); 8226a3124a3SLatchesar Ionkov perm = unixmode2p9mode(v9ses, mode | S_IFDIR); 823bd238fb4SLatchesar Ionkov fid = v9fs_create(v9ses, dir, dentry, NULL, perm, P9_OREAD); 824bd238fb4SLatchesar Ionkov if (IS_ERR(fid)) { 825bd238fb4SLatchesar Ionkov err = PTR_ERR(fid); 826bd238fb4SLatchesar Ionkov fid = NULL; 827d28c61f0SAneesh Kumar K.V } else { 828b271ec47SAneesh Kumar K.V inc_nlink(dir); 829d28c61f0SAneesh Kumar K.V v9fs_invalidate_inode_attr(dir); 830d28c61f0SAneesh Kumar K.V } 8316a3124a3SLatchesar Ionkov 832bd238fb4SLatchesar Ionkov if (fid) 833bd238fb4SLatchesar Ionkov p9_client_clunk(fid); 8346a3124a3SLatchesar Ionkov 8356a3124a3SLatchesar Ionkov return err; 8362bad8471SEric Van Hensbergen } 8372bad8471SEric Van Hensbergen 8382bad8471SEric Van Hensbergen /** 8392bad8471SEric Van Hensbergen * v9fs_vfs_lookup - VFS lookup hook to "walk" to a new inode 8402bad8471SEric Van Hensbergen * @dir: inode that is being walked from 8412bad8471SEric Van Hensbergen * @dentry: dentry that is being walked to? 8422bad8471SEric Van Hensbergen * @nameidata: path data 8432bad8471SEric Van Hensbergen * 8442bad8471SEric Van Hensbergen */ 8452bad8471SEric Van Hensbergen 84653c06f4eSAneesh Kumar K.V struct dentry *v9fs_vfs_lookup(struct inode *dir, struct dentry *dentry, 8472bad8471SEric Van Hensbergen struct nameidata *nameidata) 8482bad8471SEric Van Hensbergen { 84973f50717SAneesh Kumar K.V struct dentry *res; 8502bad8471SEric Van Hensbergen struct super_block *sb; 8512bad8471SEric Van Hensbergen struct v9fs_session_info *v9ses; 852bd238fb4SLatchesar Ionkov struct p9_fid *dfid, *fid; 8532bad8471SEric Van Hensbergen struct inode *inode; 854bd238fb4SLatchesar Ionkov char *name; 8552bad8471SEric Van Hensbergen int result = 0; 8562bad8471SEric Van Hensbergen 8575d385153SJoe Perches p9_debug(P9_DEBUG_VFS, "dir: %p dentry: (%s) %p nameidata: %p\n", 858731805b4SLatchesar Ionkov dir, dentry->d_name.name, dentry, nameidata); 8592bad8471SEric Van Hensbergen 86011e9b49bSSripathi Kodi if (dentry->d_name.len > NAME_MAX) 86111e9b49bSSripathi Kodi return ERR_PTR(-ENAMETOOLONG); 86211e9b49bSSripathi Kodi 8632bad8471SEric Van Hensbergen sb = dir->i_sb; 8642bad8471SEric Van Hensbergen v9ses = v9fs_inode2v9ses(dir); 865a534c8d1SAneesh Kumar K.V /* We can walk d_parent because we hold the dir->i_mutex */ 866bd238fb4SLatchesar Ionkov dfid = v9fs_fid_lookup(dentry->d_parent); 867bd238fb4SLatchesar Ionkov if (IS_ERR(dfid)) 868e231c2eeSDavid Howells return ERR_CAST(dfid); 8692bad8471SEric Van Hensbergen 870bd238fb4SLatchesar Ionkov name = (char *) dentry->d_name.name; 871bd238fb4SLatchesar Ionkov fid = p9_client_walk(dfid, 1, &name, 1); 872bd238fb4SLatchesar Ionkov if (IS_ERR(fid)) { 873bd238fb4SLatchesar Ionkov result = PTR_ERR(fid); 8742bad8471SEric Van Hensbergen if (result == -ENOENT) { 87585e0df24SAneesh Kumar K.V inode = NULL; 87685e0df24SAneesh Kumar K.V goto inst_out; 8772bad8471SEric Van Hensbergen } 8782bad8471SEric Van Hensbergen 879bd238fb4SLatchesar Ionkov return ERR_PTR(result); 8802bad8471SEric Van Hensbergen } 88173f50717SAneesh Kumar K.V /* 88273f50717SAneesh Kumar K.V * Make sure we don't use a wrong inode due to parallel 88373f50717SAneesh Kumar K.V * unlink. For cached mode create calls request for new 88473f50717SAneesh Kumar K.V * inode. But with cache disabled, lookup should do this. 88573f50717SAneesh Kumar K.V */ 88673f50717SAneesh Kumar K.V if (v9ses->cache) 887a78ce05dSAneesh Kumar K.V inode = v9fs_get_inode_from_fid(v9ses, fid, dir->i_sb); 88873f50717SAneesh Kumar K.V else 88973f50717SAneesh Kumar K.V inode = v9fs_get_new_inode_from_fid(v9ses, fid, dir->i_sb); 890bd238fb4SLatchesar Ionkov if (IS_ERR(inode)) { 891bd238fb4SLatchesar Ionkov result = PTR_ERR(inode); 892bd238fb4SLatchesar Ionkov inode = NULL; 893bd238fb4SLatchesar Ionkov goto error; 8942bad8471SEric Van Hensbergen } 895bd238fb4SLatchesar Ionkov result = v9fs_fid_add(dentry, fid); 8966a3124a3SLatchesar Ionkov if (result < 0) 8979856af8bSAneesh Kumar K.V goto error_iput; 89885e0df24SAneesh Kumar K.V inst_out: 89973f50717SAneesh Kumar K.V /* 90073f50717SAneesh Kumar K.V * If we had a rename on the server and a parallel lookup 90173f50717SAneesh Kumar K.V * for the new name, then make sure we instantiate with 90273f50717SAneesh Kumar K.V * the new name. ie look up for a/b, while on server somebody 90373f50717SAneesh Kumar K.V * moved b under k and client parallely did a lookup for 90473f50717SAneesh Kumar K.V * k/b. 90573f50717SAneesh Kumar K.V */ 90673f50717SAneesh Kumar K.V res = d_materialise_unique(dentry, inode); 90773f50717SAneesh Kumar K.V if (!IS_ERR(res)) 90873f50717SAneesh Kumar K.V return res; 90973f50717SAneesh Kumar K.V result = PTR_ERR(res); 9109856af8bSAneesh Kumar K.V error_iput: 9119856af8bSAneesh Kumar K.V iput(inode); 912bd238fb4SLatchesar Ionkov error: 913bd238fb4SLatchesar Ionkov p9_client_clunk(fid); 914da977b2cSEric Van Hensbergen 9152bad8471SEric Van Hensbergen return ERR_PTR(result); 9162bad8471SEric Van Hensbergen } 9172bad8471SEric Van Hensbergen 9182bad8471SEric Van Hensbergen /** 9192bad8471SEric Van Hensbergen * v9fs_vfs_unlink - VFS unlink hook to delete an inode 9202bad8471SEric Van Hensbergen * @i: inode that is being unlinked 92173c592b9SEric Van Hensbergen * @d: dentry that is being unlinked 9222bad8471SEric Van Hensbergen * 9232bad8471SEric Van Hensbergen */ 9242bad8471SEric Van Hensbergen 92553c06f4eSAneesh Kumar K.V int v9fs_vfs_unlink(struct inode *i, struct dentry *d) 9262bad8471SEric Van Hensbergen { 9272bad8471SEric Van Hensbergen return v9fs_remove(i, d, 0); 9282bad8471SEric Van Hensbergen } 9292bad8471SEric Van Hensbergen 9302bad8471SEric Van Hensbergen /** 9312bad8471SEric Van Hensbergen * v9fs_vfs_rmdir - VFS unlink hook to delete a directory 9322bad8471SEric Van Hensbergen * @i: inode that is being unlinked 93373c592b9SEric Van Hensbergen * @d: dentry that is being unlinked 9342bad8471SEric Van Hensbergen * 9352bad8471SEric Van Hensbergen */ 9362bad8471SEric Van Hensbergen 93753c06f4eSAneesh Kumar K.V int v9fs_vfs_rmdir(struct inode *i, struct dentry *d) 9382bad8471SEric Van Hensbergen { 93948e370ffSAneesh Kumar K.V return v9fs_remove(i, d, AT_REMOVEDIR); 9402bad8471SEric Van Hensbergen } 9412bad8471SEric Van Hensbergen 9422bad8471SEric Van Hensbergen /** 9432bad8471SEric Van Hensbergen * v9fs_vfs_rename - VFS hook to rename an inode 9442bad8471SEric Van Hensbergen * @old_dir: old dir inode 9452bad8471SEric Van Hensbergen * @old_dentry: old dentry 9462bad8471SEric Van Hensbergen * @new_dir: new dir inode 9472bad8471SEric Van Hensbergen * @new_dentry: new dentry 9482bad8471SEric Van Hensbergen * 9492bad8471SEric Van Hensbergen */ 9502bad8471SEric Van Hensbergen 95153c06f4eSAneesh Kumar K.V int 9522bad8471SEric Van Hensbergen v9fs_vfs_rename(struct inode *old_dir, struct dentry *old_dentry, 9532bad8471SEric Van Hensbergen struct inode *new_dir, struct dentry *new_dentry) 9542bad8471SEric Van Hensbergen { 955d28c61f0SAneesh Kumar K.V int retval; 956bd238fb4SLatchesar Ionkov struct inode *old_inode; 957b271ec47SAneesh Kumar K.V struct inode *new_inode; 958bd238fb4SLatchesar Ionkov struct v9fs_session_info *v9ses; 959bd238fb4SLatchesar Ionkov struct p9_fid *oldfid; 960bd238fb4SLatchesar Ionkov struct p9_fid *olddirfid; 961bd238fb4SLatchesar Ionkov struct p9_fid *newdirfid; 962bd238fb4SLatchesar Ionkov struct p9_wstat wstat; 9632bad8471SEric Van Hensbergen 9645d385153SJoe Perches p9_debug(P9_DEBUG_VFS, "\n"); 965bd238fb4SLatchesar Ionkov retval = 0; 966bd238fb4SLatchesar Ionkov old_inode = old_dentry->d_inode; 967b271ec47SAneesh Kumar K.V new_inode = new_dentry->d_inode; 968bd238fb4SLatchesar Ionkov v9ses = v9fs_inode2v9ses(old_inode); 969bd238fb4SLatchesar Ionkov oldfid = v9fs_fid_lookup(old_dentry); 970da977b2cSEric Van Hensbergen if (IS_ERR(oldfid)) 971da977b2cSEric Van Hensbergen return PTR_ERR(oldfid); 972da977b2cSEric Van Hensbergen 973da977b2cSEric Van Hensbergen olddirfid = v9fs_fid_clone(old_dentry->d_parent); 974da977b2cSEric Van Hensbergen if (IS_ERR(olddirfid)) { 975da977b2cSEric Van Hensbergen retval = PTR_ERR(olddirfid); 976bd238fb4SLatchesar Ionkov goto done; 977da977b2cSEric Van Hensbergen } 978da977b2cSEric Van Hensbergen 979da977b2cSEric Van Hensbergen newdirfid = v9fs_fid_clone(new_dentry->d_parent); 980da977b2cSEric Van Hensbergen if (IS_ERR(newdirfid)) { 981da977b2cSEric Van Hensbergen retval = PTR_ERR(newdirfid); 982bd238fb4SLatchesar Ionkov goto clunk_olddir; 9832bad8471SEric Van Hensbergen } 9842bad8471SEric Van Hensbergen 985a534c8d1SAneesh Kumar K.V down_write(&v9ses->rename_sem); 9864681dbdaSSripathi Kodi if (v9fs_proto_dotl(v9ses)) { 9879e8fb38eSAneesh Kumar K.V retval = p9_client_renameat(olddirfid, old_dentry->d_name.name, 9889e8fb38eSAneesh Kumar K.V newdirfid, new_dentry->d_name.name); 9899e8fb38eSAneesh Kumar K.V if (retval == -EOPNOTSUPP) 9904681dbdaSSripathi Kodi retval = p9_client_rename(oldfid, newdirfid, 9919e8fb38eSAneesh Kumar K.V new_dentry->d_name.name); 9929e8fb38eSAneesh Kumar K.V if (retval != -EOPNOTSUPP) 9934681dbdaSSripathi Kodi goto clunk_newdir; 9944681dbdaSSripathi Kodi } 995a534c8d1SAneesh Kumar K.V if (old_dentry->d_parent != new_dentry->d_parent) { 996a534c8d1SAneesh Kumar K.V /* 997a534c8d1SAneesh Kumar K.V * 9P .u can only handle file rename in the same directory 998a534c8d1SAneesh Kumar K.V */ 9994681dbdaSSripathi Kodi 10005d385153SJoe Perches p9_debug(P9_DEBUG_ERROR, "old dir and new dir are different\n"); 1001621997cdSEric Van Hensbergen retval = -EXDEV; 1002bd238fb4SLatchesar Ionkov goto clunk_newdir; 10032bad8471SEric Van Hensbergen } 1004531b1094SLatchesar Ionkov v9fs_blank_wstat(&wstat); 1005ba17674fSLatchesar Ionkov wstat.muid = v9ses->uname; 1006531b1094SLatchesar Ionkov wstat.name = (char *) new_dentry->d_name.name; 1007bd238fb4SLatchesar Ionkov retval = p9_client_wstat(oldfid, &wstat); 10082bad8471SEric Van Hensbergen 1009bd238fb4SLatchesar Ionkov clunk_newdir: 1010b271ec47SAneesh Kumar K.V if (!retval) { 1011b271ec47SAneesh Kumar K.V if (new_inode) { 1012b271ec47SAneesh Kumar K.V if (S_ISDIR(new_inode->i_mode)) 1013b271ec47SAneesh Kumar K.V clear_nlink(new_inode); 1014b271ec47SAneesh Kumar K.V else 1015b271ec47SAneesh Kumar K.V drop_nlink(new_inode); 1016b271ec47SAneesh Kumar K.V } 1017b271ec47SAneesh Kumar K.V if (S_ISDIR(old_inode->i_mode)) { 1018b271ec47SAneesh Kumar K.V if (!new_inode) 1019b271ec47SAneesh Kumar K.V inc_nlink(new_dir); 1020b271ec47SAneesh Kumar K.V drop_nlink(old_dir); 1021b271ec47SAneesh Kumar K.V } 10223bc86de3SAneesh Kumar K.V v9fs_invalidate_inode_attr(old_inode); 1023d28c61f0SAneesh Kumar K.V v9fs_invalidate_inode_attr(old_dir); 1024d28c61f0SAneesh Kumar K.V v9fs_invalidate_inode_attr(new_dir); 10253bc86de3SAneesh Kumar K.V 1026a534c8d1SAneesh Kumar K.V /* successful rename */ 1027a534c8d1SAneesh Kumar K.V d_move(old_dentry, new_dentry); 1028b271ec47SAneesh Kumar K.V } 1029a534c8d1SAneesh Kumar K.V up_write(&v9ses->rename_sem); 103022150c4fSLatchesar Ionkov p9_client_clunk(newdirfid); 10312bad8471SEric Van Hensbergen 1032bd238fb4SLatchesar Ionkov clunk_olddir: 103322150c4fSLatchesar Ionkov p9_client_clunk(olddirfid); 10342bad8471SEric Van Hensbergen 1035bd238fb4SLatchesar Ionkov done: 10362bad8471SEric Van Hensbergen return retval; 10372bad8471SEric Van Hensbergen } 10382bad8471SEric Van Hensbergen 10392bad8471SEric Van Hensbergen /** 1040943ffb58SAdrian Bunk * v9fs_vfs_getattr - retrieve file metadata 1041ee443996SEric Van Hensbergen * @mnt: mount information 1042ee443996SEric Van Hensbergen * @dentry: file to get attributes on 1043ee443996SEric Van Hensbergen * @stat: metadata structure to populate 10442bad8471SEric Van Hensbergen * 10452bad8471SEric Van Hensbergen */ 10462bad8471SEric Van Hensbergen 10472bad8471SEric Van Hensbergen static int 10482bad8471SEric Van Hensbergen v9fs_vfs_getattr(struct vfsmount *mnt, struct dentry *dentry, 10492bad8471SEric Van Hensbergen struct kstat *stat) 10502bad8471SEric Van Hensbergen { 1051bd238fb4SLatchesar Ionkov int err; 1052bd238fb4SLatchesar Ionkov struct v9fs_session_info *v9ses; 1053bd238fb4SLatchesar Ionkov struct p9_fid *fid; 105451a87c55SEric Van Hensbergen struct p9_wstat *st; 10552bad8471SEric Van Hensbergen 10565d385153SJoe Perches p9_debug(P9_DEBUG_VFS, "dentry: %p\n", dentry); 1057bd238fb4SLatchesar Ionkov err = -EPERM; 105842869c8aSAneesh Kumar K.V v9ses = v9fs_dentry2v9ses(dentry); 1059a1211908SAneesh Kumar K.V if (v9ses->cache == CACHE_LOOSE || v9ses->cache == CACHE_FSCACHE) { 1060a1211908SAneesh Kumar K.V generic_fillattr(dentry->d_inode, stat); 1061a1211908SAneesh Kumar K.V return 0; 1062a1211908SAneesh Kumar K.V } 1063bd238fb4SLatchesar Ionkov fid = v9fs_fid_lookup(dentry); 1064da977b2cSEric Van Hensbergen if (IS_ERR(fid)) 1065da977b2cSEric Van Hensbergen return PTR_ERR(fid); 10662bad8471SEric Van Hensbergen 1067bd238fb4SLatchesar Ionkov st = p9_client_stat(fid); 1068bd238fb4SLatchesar Ionkov if (IS_ERR(st)) 1069bd238fb4SLatchesar Ionkov return PTR_ERR(st); 10702bad8471SEric Van Hensbergen 1071bd238fb4SLatchesar Ionkov v9fs_stat2inode(st, dentry->d_inode, dentry->d_inode->i_sb); 10722bad8471SEric Van Hensbergen generic_fillattr(dentry->d_inode, stat); 10732bad8471SEric Van Hensbergen 107462b2be59SLatchesar Ionkov p9stat_free(st); 1075bd238fb4SLatchesar Ionkov kfree(st); 1076bd238fb4SLatchesar Ionkov return 0; 10772bad8471SEric Van Hensbergen } 10782bad8471SEric Van Hensbergen 10792bad8471SEric Van Hensbergen /** 10802bad8471SEric Van Hensbergen * v9fs_vfs_setattr - set file metadata 10812bad8471SEric Van Hensbergen * @dentry: file whose metadata to set 10822bad8471SEric Van Hensbergen * @iattr: metadata assignment structure 10832bad8471SEric Van Hensbergen * 10842bad8471SEric Van Hensbergen */ 10852bad8471SEric Van Hensbergen 10862bad8471SEric Van Hensbergen static int v9fs_vfs_setattr(struct dentry *dentry, struct iattr *iattr) 10872bad8471SEric Van Hensbergen { 1088bd238fb4SLatchesar Ionkov int retval; 1089bd238fb4SLatchesar Ionkov struct v9fs_session_info *v9ses; 1090bd238fb4SLatchesar Ionkov struct p9_fid *fid; 1091bd238fb4SLatchesar Ionkov struct p9_wstat wstat; 10922bad8471SEric Van Hensbergen 10935d385153SJoe Perches p9_debug(P9_DEBUG_VFS, "\n"); 1094059c138bSAneesh Kumar K.V retval = inode_change_ok(dentry->d_inode, iattr); 1095059c138bSAneesh Kumar K.V if (retval) 1096059c138bSAneesh Kumar K.V return retval; 1097059c138bSAneesh Kumar K.V 1098bd238fb4SLatchesar Ionkov retval = -EPERM; 109942869c8aSAneesh Kumar K.V v9ses = v9fs_dentry2v9ses(dentry); 1100bd238fb4SLatchesar Ionkov fid = v9fs_fid_lookup(dentry); 1101da977b2cSEric Van Hensbergen if(IS_ERR(fid)) 1102da977b2cSEric Van Hensbergen return PTR_ERR(fid); 11032bad8471SEric Van Hensbergen 1104531b1094SLatchesar Ionkov v9fs_blank_wstat(&wstat); 11052bad8471SEric Van Hensbergen if (iattr->ia_valid & ATTR_MODE) 1106531b1094SLatchesar Ionkov wstat.mode = unixmode2p9mode(v9ses, iattr->ia_mode); 11072bad8471SEric Van Hensbergen 11082bad8471SEric Van Hensbergen if (iattr->ia_valid & ATTR_MTIME) 1109531b1094SLatchesar Ionkov wstat.mtime = iattr->ia_mtime.tv_sec; 11102bad8471SEric Van Hensbergen 11112bad8471SEric Van Hensbergen if (iattr->ia_valid & ATTR_ATIME) 1112531b1094SLatchesar Ionkov wstat.atime = iattr->ia_atime.tv_sec; 11132bad8471SEric Van Hensbergen 11142bad8471SEric Van Hensbergen if (iattr->ia_valid & ATTR_SIZE) 1115531b1094SLatchesar Ionkov wstat.length = iattr->ia_size; 11162bad8471SEric Van Hensbergen 1117dd6102fbSSripathi Kodi if (v9fs_proto_dotu(v9ses)) { 1118531b1094SLatchesar Ionkov if (iattr->ia_valid & ATTR_UID) 1119531b1094SLatchesar Ionkov wstat.n_uid = iattr->ia_uid; 11202bad8471SEric Van Hensbergen 1121531b1094SLatchesar Ionkov if (iattr->ia_valid & ATTR_GID) 1122531b1094SLatchesar Ionkov wstat.n_gid = iattr->ia_gid; 11232bad8471SEric Van Hensbergen } 1124059c138bSAneesh Kumar K.V 11253dc5436aSAneesh Kumar K.V /* Write all dirty data */ 11263dc5436aSAneesh Kumar K.V if (S_ISREG(dentry->d_inode->i_mode)) 11273dc5436aSAneesh Kumar K.V filemap_write_and_wait(dentry->d_inode->i_mapping); 11283dc5436aSAneesh Kumar K.V 1129f10fc50fSAneesh Kumar K.V retval = p9_client_wstat(fid, &wstat); 1130f10fc50fSAneesh Kumar K.V if (retval < 0) 1131f10fc50fSAneesh Kumar K.V return retval; 1132059c138bSAneesh Kumar K.V 1133059c138bSAneesh Kumar K.V if ((iattr->ia_valid & ATTR_SIZE) && 1134059c138bSAneesh Kumar K.V iattr->ia_size != i_size_read(dentry->d_inode)) 1135059c138bSAneesh Kumar K.V truncate_setsize(dentry->d_inode, iattr->ia_size); 1136059c138bSAneesh Kumar K.V 1137f10fc50fSAneesh Kumar K.V v9fs_invalidate_inode_attr(dentry->d_inode); 11381025774cSChristoph Hellwig 11391025774cSChristoph Hellwig setattr_copy(dentry->d_inode, iattr); 11401025774cSChristoph Hellwig mark_inode_dirty(dentry->d_inode); 11411025774cSChristoph Hellwig return 0; 11422bad8471SEric Van Hensbergen } 11432bad8471SEric Van Hensbergen 11442bad8471SEric Van Hensbergen /** 1145531b1094SLatchesar Ionkov * v9fs_stat2inode - populate an inode structure with mistat info 1146531b1094SLatchesar Ionkov * @stat: Plan 9 metadata (mistat) structure 11472bad8471SEric Van Hensbergen * @inode: inode to populate 11482bad8471SEric Van Hensbergen * @sb: superblock of filesystem 11492bad8471SEric Van Hensbergen * 11502bad8471SEric Van Hensbergen */ 11512bad8471SEric Van Hensbergen 11522bad8471SEric Van Hensbergen void 115351a87c55SEric Van Hensbergen v9fs_stat2inode(struct p9_wstat *stat, struct inode *inode, 11542bad8471SEric Van Hensbergen struct super_block *sb) 11552bad8471SEric Van Hensbergen { 115645089142SAneesh Kumar K.V mode_t mode; 1157531b1094SLatchesar Ionkov char ext[32]; 11585717144aSAneesh Kumar K.V char tag_name[14]; 11595717144aSAneesh Kumar K.V unsigned int i_nlink; 11602bad8471SEric Van Hensbergen struct v9fs_session_info *v9ses = sb->s_fs_info; 1161b3cbea03SAneesh Kumar K.V struct v9fs_inode *v9inode = V9FS_I(inode); 11622bad8471SEric Van Hensbergen 1163bfe86848SMiklos Szeredi set_nlink(inode, 1); 11642bad8471SEric Van Hensbergen 1165531b1094SLatchesar Ionkov inode->i_atime.tv_sec = stat->atime; 1166531b1094SLatchesar Ionkov inode->i_mtime.tv_sec = stat->mtime; 1167531b1094SLatchesar Ionkov inode->i_ctime.tv_sec = stat->mtime; 11682bad8471SEric Van Hensbergen 1169bd32b82dSLatchesar Ionkov inode->i_uid = v9ses->dfltuid; 1170bd32b82dSLatchesar Ionkov inode->i_gid = v9ses->dfltgid; 11712bad8471SEric Van Hensbergen 1172dd6102fbSSripathi Kodi if (v9fs_proto_dotu(v9ses)) { 1173531b1094SLatchesar Ionkov inode->i_uid = stat->n_uid; 1174531b1094SLatchesar Ionkov inode->i_gid = stat->n_gid; 1175531b1094SLatchesar Ionkov } 11765717144aSAneesh Kumar K.V if ((S_ISREG(inode->i_mode)) || (S_ISDIR(inode->i_mode))) { 11775717144aSAneesh Kumar K.V if (v9fs_proto_dotu(v9ses) && (stat->extension[0] != '\0')) { 11785717144aSAneesh Kumar K.V /* 11795717144aSAneesh Kumar K.V * Hadlink support got added later to 11805717144aSAneesh Kumar K.V * to the .u extension. So there can be 11815717144aSAneesh Kumar K.V * server out there that doesn't support 11825717144aSAneesh Kumar K.V * this even with .u extension. So check 11835717144aSAneesh Kumar K.V * for non NULL stat->extension 11845717144aSAneesh Kumar K.V */ 11855717144aSAneesh Kumar K.V strncpy(ext, stat->extension, sizeof(ext)); 11865717144aSAneesh Kumar K.V /* HARDLINKCOUNT %u */ 11875717144aSAneesh Kumar K.V sscanf(ext, "%13s %u", tag_name, &i_nlink); 11885717144aSAneesh Kumar K.V if (!strncmp(tag_name, "HARDLINKCOUNT", 13)) 1189bfe86848SMiklos Szeredi set_nlink(inode, i_nlink); 11905717144aSAneesh Kumar K.V } 11915717144aSAneesh Kumar K.V } 1192df345c67SAneesh Kumar K.V mode = p9mode2perm(v9ses, stat); 119345089142SAneesh Kumar K.V mode |= inode->i_mode & ~S_IALLUGO; 119445089142SAneesh Kumar K.V inode->i_mode = mode; 11957549ae3eSAbhishek Kulkarni i_size_write(inode, stat->length); 11962bad8471SEric Van Hensbergen 1197bd238fb4SLatchesar Ionkov /* not real number of blocks, but 512 byte ones ... */ 11987549ae3eSAbhishek Kulkarni inode->i_blocks = (i_size_read(inode) + 512 - 1) >> 9; 1199b3cbea03SAneesh Kumar K.V v9inode->cache_validity &= ~V9FS_INO_INVALID_ATTR; 12002bad8471SEric Van Hensbergen } 12012bad8471SEric Van Hensbergen 12022bad8471SEric Van Hensbergen /** 12032bad8471SEric Van Hensbergen * v9fs_qid2ino - convert qid into inode number 12042bad8471SEric Van Hensbergen * @qid: qid to hash 12052bad8471SEric Van Hensbergen * 12062bad8471SEric Van Hensbergen * BUG: potential for inode number collisions? 12072bad8471SEric Van Hensbergen */ 12082bad8471SEric Van Hensbergen 1209bd238fb4SLatchesar Ionkov ino_t v9fs_qid2ino(struct p9_qid *qid) 12102bad8471SEric Van Hensbergen { 12112bad8471SEric Van Hensbergen u64 path = qid->path + 2; 12122bad8471SEric Van Hensbergen ino_t i = 0; 12132bad8471SEric Van Hensbergen 12142bad8471SEric Van Hensbergen if (sizeof(ino_t) == sizeof(path)) 12152bad8471SEric Van Hensbergen memcpy(&i, &path, sizeof(ino_t)); 12162bad8471SEric Van Hensbergen else 12172bad8471SEric Van Hensbergen i = (ino_t) (path ^ (path >> 32)); 12182bad8471SEric Van Hensbergen 12192bad8471SEric Van Hensbergen return i; 12202bad8471SEric Van Hensbergen } 12212bad8471SEric Van Hensbergen 12222bad8471SEric Van Hensbergen /** 12232bad8471SEric Van Hensbergen * v9fs_readlink - read a symlink's location (internal version) 12242bad8471SEric Van Hensbergen * @dentry: dentry for symlink 122573c592b9SEric Van Hensbergen * @buffer: buffer to load symlink location into 12262bad8471SEric Van Hensbergen * @buflen: length of buffer 12272bad8471SEric Van Hensbergen * 12282bad8471SEric Van Hensbergen */ 12292bad8471SEric Van Hensbergen 12302bad8471SEric Van Hensbergen static int v9fs_readlink(struct dentry *dentry, char *buffer, int buflen) 12312bad8471SEric Van Hensbergen { 1232bd238fb4SLatchesar Ionkov int retval; 12332bad8471SEric Van Hensbergen 1234bd238fb4SLatchesar Ionkov struct v9fs_session_info *v9ses; 1235bd238fb4SLatchesar Ionkov struct p9_fid *fid; 123651a87c55SEric Van Hensbergen struct p9_wstat *st; 12372bad8471SEric Van Hensbergen 12385d385153SJoe Perches p9_debug(P9_DEBUG_VFS, " %s\n", dentry->d_name.name); 1239bd238fb4SLatchesar Ionkov retval = -EPERM; 124042869c8aSAneesh Kumar K.V v9ses = v9fs_dentry2v9ses(dentry); 1241bd238fb4SLatchesar Ionkov fid = v9fs_fid_lookup(dentry); 1242da977b2cSEric Van Hensbergen if (IS_ERR(fid)) 1243da977b2cSEric Van Hensbergen return PTR_ERR(fid); 12442bad8471SEric Van Hensbergen 1245329176ccSM. Mohan Kumar if (!v9fs_proto_dotu(v9ses)) 1246bd238fb4SLatchesar Ionkov return -EBADF; 12472bad8471SEric Van Hensbergen 1248bd238fb4SLatchesar Ionkov st = p9_client_stat(fid); 1249bd238fb4SLatchesar Ionkov if (IS_ERR(st)) 1250bd238fb4SLatchesar Ionkov return PTR_ERR(st); 12512bad8471SEric Van Hensbergen 1252bd238fb4SLatchesar Ionkov if (!(st->mode & P9_DMSYMLINK)) { 12532bad8471SEric Van Hensbergen retval = -EINVAL; 1254bd238fb4SLatchesar Ionkov goto done; 12552bad8471SEric Van Hensbergen } 12562bad8471SEric Van Hensbergen 12572bad8471SEric Van Hensbergen /* copy extension buffer into buffer */ 125851a87c55SEric Van Hensbergen strncpy(buffer, st->extension, buflen); 12592bad8471SEric Van Hensbergen 12605d385153SJoe Perches p9_debug(P9_DEBUG_VFS, "%s -> %s (%s)\n", 12615d385153SJoe Perches dentry->d_name.name, st->extension, buffer); 1262bd238fb4SLatchesar Ionkov 12632511cd0bSMartin Stava retval = strnlen(buffer, buflen); 1264bd238fb4SLatchesar Ionkov done: 126562b2be59SLatchesar Ionkov p9stat_free(st); 1266bd238fb4SLatchesar Ionkov kfree(st); 12672bad8471SEric Van Hensbergen return retval; 12682bad8471SEric Van Hensbergen } 12692bad8471SEric Van Hensbergen 12702bad8471SEric Van Hensbergen /** 12712bad8471SEric Van Hensbergen * v9fs_vfs_follow_link - follow a symlink path 12722bad8471SEric Van Hensbergen * @dentry: dentry for symlink 12732bad8471SEric Van Hensbergen * @nd: nameidata 12742bad8471SEric Van Hensbergen * 12752bad8471SEric Van Hensbergen */ 12762bad8471SEric Van Hensbergen 12772bad8471SEric Van Hensbergen static void *v9fs_vfs_follow_link(struct dentry *dentry, struct nameidata *nd) 12782bad8471SEric Van Hensbergen { 12792bad8471SEric Van Hensbergen int len = 0; 12802bad8471SEric Van Hensbergen char *link = __getname(); 12812bad8471SEric Van Hensbergen 12825d385153SJoe Perches p9_debug(P9_DEBUG_VFS, "%s\n", dentry->d_name.name); 12832bad8471SEric Van Hensbergen 12842bad8471SEric Van Hensbergen if (!link) 12852bad8471SEric Van Hensbergen link = ERR_PTR(-ENOMEM); 12862bad8471SEric Van Hensbergen else { 128716cce6d2SLatchesar Ionkov len = v9fs_readlink(dentry, link, PATH_MAX); 12882bad8471SEric Van Hensbergen 12892bad8471SEric Van Hensbergen if (len < 0) { 1290ce44eeb6SDavi Arnaut __putname(link); 12912bad8471SEric Van Hensbergen link = ERR_PTR(len); 12922bad8471SEric Van Hensbergen } else 12932511cd0bSMartin Stava link[min(len, PATH_MAX-1)] = 0; 12942bad8471SEric Van Hensbergen } 12952bad8471SEric Van Hensbergen nd_set_link(nd, link); 12962bad8471SEric Van Hensbergen 12972bad8471SEric Van Hensbergen return NULL; 12982bad8471SEric Van Hensbergen } 12992bad8471SEric Van Hensbergen 13002bad8471SEric Van Hensbergen /** 13012bad8471SEric Van Hensbergen * v9fs_vfs_put_link - release a symlink path 13022bad8471SEric Van Hensbergen * @dentry: dentry for symlink 13032bad8471SEric Van Hensbergen * @nd: nameidata 1304ee443996SEric Van Hensbergen * @p: unused 13052bad8471SEric Van Hensbergen * 13062bad8471SEric Van Hensbergen */ 13072bad8471SEric Van Hensbergen 130853c06f4eSAneesh Kumar K.V void 1309ee443996SEric Van Hensbergen v9fs_vfs_put_link(struct dentry *dentry, struct nameidata *nd, void *p) 13102bad8471SEric Van Hensbergen { 13112bad8471SEric Van Hensbergen char *s = nd_get_link(nd); 13122bad8471SEric Van Hensbergen 13135d385153SJoe Perches p9_debug(P9_DEBUG_VFS, " %s %s\n", 13145d385153SJoe Perches dentry->d_name.name, IS_ERR(s) ? "<error>" : s); 13152bad8471SEric Van Hensbergen if (!IS_ERR(s)) 1316ce44eeb6SDavi Arnaut __putname(s); 13172bad8471SEric Van Hensbergen } 13182bad8471SEric Van Hensbergen 1319ee443996SEric Van Hensbergen /** 1320ee443996SEric Van Hensbergen * v9fs_vfs_mkspecial - create a special file 1321ee443996SEric Van Hensbergen * @dir: inode to create special file in 1322ee443996SEric Van Hensbergen * @dentry: dentry to create 1323ee443996SEric Van Hensbergen * @mode: mode to create special file 1324ee443996SEric Van Hensbergen * @extension: 9p2000.u format extension string representing special file 1325ee443996SEric Van Hensbergen * 1326ee443996SEric Van Hensbergen */ 1327ee443996SEric Van Hensbergen 1328531b1094SLatchesar Ionkov static int v9fs_vfs_mkspecial(struct inode *dir, struct dentry *dentry, 1329531b1094SLatchesar Ionkov int mode, const char *extension) 1330531b1094SLatchesar Ionkov { 1331bd238fb4SLatchesar Ionkov u32 perm; 1332bd238fb4SLatchesar Ionkov struct p9_fid *fid; 1333d28c61f0SAneesh Kumar K.V struct v9fs_session_info *v9ses; 1334531b1094SLatchesar Ionkov 13356a3124a3SLatchesar Ionkov v9ses = v9fs_inode2v9ses(dir); 1336dd6102fbSSripathi Kodi if (!v9fs_proto_dotu(v9ses)) { 13375d385153SJoe Perches p9_debug(P9_DEBUG_ERROR, "not extended\n"); 13386a3124a3SLatchesar Ionkov return -EPERM; 1339531b1094SLatchesar Ionkov } 1340531b1094SLatchesar Ionkov 1341da977b2cSEric Van Hensbergen perm = unixmode2p9mode(v9ses, mode); 1342bd238fb4SLatchesar Ionkov fid = v9fs_create(v9ses, dir, dentry, (char *) extension, perm, 1343bd238fb4SLatchesar Ionkov P9_OREAD); 1344bd238fb4SLatchesar Ionkov if (IS_ERR(fid)) 1345bd238fb4SLatchesar Ionkov return PTR_ERR(fid); 1346da977b2cSEric Van Hensbergen 1347d28c61f0SAneesh Kumar K.V v9fs_invalidate_inode_attr(dir); 1348bd238fb4SLatchesar Ionkov p9_client_clunk(fid); 13496a3124a3SLatchesar Ionkov return 0; 1350531b1094SLatchesar Ionkov } 1351531b1094SLatchesar Ionkov 1352531b1094SLatchesar Ionkov /** 1353531b1094SLatchesar Ionkov * v9fs_vfs_symlink - helper function to create symlinks 1354531b1094SLatchesar Ionkov * @dir: directory inode containing symlink 1355531b1094SLatchesar Ionkov * @dentry: dentry for symlink 1356531b1094SLatchesar Ionkov * @symname: symlink data 1357531b1094SLatchesar Ionkov * 1358ee443996SEric Van Hensbergen * See Also: 9P2000.u RFC for more information 1359531b1094SLatchesar Ionkov * 1360531b1094SLatchesar Ionkov */ 1361531b1094SLatchesar Ionkov 1362531b1094SLatchesar Ionkov static int 1363531b1094SLatchesar Ionkov v9fs_vfs_symlink(struct inode *dir, struct dentry *dentry, const char *symname) 1364531b1094SLatchesar Ionkov { 13655d385153SJoe Perches p9_debug(P9_DEBUG_VFS, " %lu,%s,%s\n", 13665d385153SJoe Perches dir->i_ino, dentry->d_name.name, symname); 1367531b1094SLatchesar Ionkov 1368531b1094SLatchesar Ionkov return v9fs_vfs_mkspecial(dir, dentry, S_IFLNK, symname); 1369531b1094SLatchesar Ionkov } 1370531b1094SLatchesar Ionkov 13712bad8471SEric Van Hensbergen /** 13722bad8471SEric Van Hensbergen * v9fs_vfs_link - create a hardlink 13732bad8471SEric Van Hensbergen * @old_dentry: dentry for file to link to 13742bad8471SEric Van Hensbergen * @dir: inode destination for new link 137573c592b9SEric Van Hensbergen * @dentry: dentry for link 13762bad8471SEric Van Hensbergen * 13772bad8471SEric Van Hensbergen */ 13782bad8471SEric Van Hensbergen 13792bad8471SEric Van Hensbergen static int 13802bad8471SEric Van Hensbergen v9fs_vfs_link(struct dentry *old_dentry, struct inode *dir, 13812bad8471SEric Van Hensbergen struct dentry *dentry) 13822bad8471SEric Van Hensbergen { 1383531b1094SLatchesar Ionkov int retval; 1384531b1094SLatchesar Ionkov char *name; 1385d28c61f0SAneesh Kumar K.V struct p9_fid *oldfid; 13862bad8471SEric Van Hensbergen 13875d385153SJoe Perches p9_debug(P9_DEBUG_VFS, " %lu,%s,%s\n", 13885d385153SJoe Perches dir->i_ino, dentry->d_name.name, old_dentry->d_name.name); 13892bad8471SEric Van Hensbergen 1390da977b2cSEric Van Hensbergen oldfid = v9fs_fid_clone(old_dentry); 1391da977b2cSEric Van Hensbergen if (IS_ERR(oldfid)) 1392da977b2cSEric Van Hensbergen return PTR_ERR(oldfid); 13932bad8471SEric Van Hensbergen 1394531b1094SLatchesar Ionkov name = __getname(); 1395da977b2cSEric Van Hensbergen if (unlikely(!name)) { 1396da977b2cSEric Van Hensbergen retval = -ENOMEM; 1397da977b2cSEric Van Hensbergen goto clunk_fid; 1398da977b2cSEric Van Hensbergen } 13990710d36aSFlorin Malita 140016cce6d2SLatchesar Ionkov sprintf(name, "%d\n", oldfid->fid); 1401bd238fb4SLatchesar Ionkov retval = v9fs_vfs_mkspecial(dir, dentry, P9_DMLINK, name); 1402531b1094SLatchesar Ionkov __putname(name); 1403c06c066aSAneesh Kumar K.V if (!retval) { 1404c06c066aSAneesh Kumar K.V v9fs_refresh_inode(oldfid, old_dentry->d_inode); 1405d28c61f0SAneesh Kumar K.V v9fs_invalidate_inode_attr(dir); 1406c06c066aSAneesh Kumar K.V } 1407da977b2cSEric Van Hensbergen clunk_fid: 1408bd238fb4SLatchesar Ionkov p9_client_clunk(oldfid); 14092bad8471SEric Van Hensbergen return retval; 14102bad8471SEric Van Hensbergen } 14112bad8471SEric Van Hensbergen 14122bad8471SEric Van Hensbergen /** 14132bad8471SEric Van Hensbergen * v9fs_vfs_mknod - create a special file 14142bad8471SEric Van Hensbergen * @dir: inode destination for new link 14152bad8471SEric Van Hensbergen * @dentry: dentry for file 14162bad8471SEric Van Hensbergen * @mode: mode for creation 1417ee443996SEric Van Hensbergen * @rdev: device associated with special file 14182bad8471SEric Van Hensbergen * 14192bad8471SEric Van Hensbergen */ 14202bad8471SEric Van Hensbergen 14212bad8471SEric Van Hensbergen static int 14222bad8471SEric Van Hensbergen v9fs_vfs_mknod(struct inode *dir, struct dentry *dentry, int mode, dev_t rdev) 14232bad8471SEric Van Hensbergen { 1424531b1094SLatchesar Ionkov int retval; 1425531b1094SLatchesar Ionkov char *name; 14262bad8471SEric Van Hensbergen 14275d385153SJoe Perches p9_debug(P9_DEBUG_VFS, " %lu,%s mode: %x MAJOR: %u MINOR: %u\n", 14285d385153SJoe Perches dir->i_ino, dentry->d_name.name, mode, 14295d385153SJoe Perches MAJOR(rdev), MINOR(rdev)); 14302bad8471SEric Van Hensbergen 1431531b1094SLatchesar Ionkov if (!new_valid_dev(rdev)) 1432531b1094SLatchesar Ionkov return -EINVAL; 143373c592b9SEric Van Hensbergen 1434531b1094SLatchesar Ionkov name = __getname(); 1435c0291a05SEugene Teo if (!name) 1436c0291a05SEugene Teo return -ENOMEM; 14372bad8471SEric Van Hensbergen /* build extension */ 14382bad8471SEric Van Hensbergen if (S_ISBLK(mode)) 1439531b1094SLatchesar Ionkov sprintf(name, "b %u %u", MAJOR(rdev), MINOR(rdev)); 14402bad8471SEric Van Hensbergen else if (S_ISCHR(mode)) 1441531b1094SLatchesar Ionkov sprintf(name, "c %u %u", MAJOR(rdev), MINOR(rdev)); 144273c592b9SEric Van Hensbergen else if (S_ISFIFO(mode)) 1443531b1094SLatchesar Ionkov *name = 0; 144475cc5c9bSVenkateswararao Jujjuri else if (S_ISSOCK(mode)) 144575cc5c9bSVenkateswararao Jujjuri *name = 0; 14462bad8471SEric Van Hensbergen else { 1447531b1094SLatchesar Ionkov __putname(name); 1448531b1094SLatchesar Ionkov return -EINVAL; 14492bad8471SEric Van Hensbergen } 14502bad8471SEric Van Hensbergen 1451531b1094SLatchesar Ionkov retval = v9fs_vfs_mkspecial(dir, dentry, mode, name); 1452531b1094SLatchesar Ionkov __putname(name); 14532bad8471SEric Van Hensbergen 14542bad8471SEric Van Hensbergen return retval; 14552bad8471SEric Van Hensbergen } 14562bad8471SEric Van Hensbergen 1457b3cbea03SAneesh Kumar K.V int v9fs_refresh_inode(struct p9_fid *fid, struct inode *inode) 1458b3cbea03SAneesh Kumar K.V { 145945089142SAneesh Kumar K.V int umode; 146045089142SAneesh Kumar K.V dev_t rdev; 1461b3cbea03SAneesh Kumar K.V loff_t i_size; 1462b3cbea03SAneesh Kumar K.V struct p9_wstat *st; 1463b3cbea03SAneesh Kumar K.V struct v9fs_session_info *v9ses; 1464b3cbea03SAneesh Kumar K.V 1465b3cbea03SAneesh Kumar K.V v9ses = v9fs_inode2v9ses(inode); 1466b3cbea03SAneesh Kumar K.V st = p9_client_stat(fid); 1467b3cbea03SAneesh Kumar K.V if (IS_ERR(st)) 1468b3cbea03SAneesh Kumar K.V return PTR_ERR(st); 146945089142SAneesh Kumar K.V /* 147045089142SAneesh Kumar K.V * Don't update inode if the file type is different 147145089142SAneesh Kumar K.V */ 147245089142SAneesh Kumar K.V umode = p9mode2unixmode(v9ses, st, &rdev); 147345089142SAneesh Kumar K.V if ((inode->i_mode & S_IFMT) != (umode & S_IFMT)) 147445089142SAneesh Kumar K.V goto out; 1475b3cbea03SAneesh Kumar K.V 1476b3cbea03SAneesh Kumar K.V spin_lock(&inode->i_lock); 1477b3cbea03SAneesh Kumar K.V /* 1478b3cbea03SAneesh Kumar K.V * We don't want to refresh inode->i_size, 1479b3cbea03SAneesh Kumar K.V * because we may have cached data 1480b3cbea03SAneesh Kumar K.V */ 1481b3cbea03SAneesh Kumar K.V i_size = inode->i_size; 1482b3cbea03SAneesh Kumar K.V v9fs_stat2inode(st, inode, inode->i_sb); 1483b3cbea03SAneesh Kumar K.V if (v9ses->cache) 1484b3cbea03SAneesh Kumar K.V inode->i_size = i_size; 1485b3cbea03SAneesh Kumar K.V spin_unlock(&inode->i_lock); 148645089142SAneesh Kumar K.V out: 1487b3cbea03SAneesh Kumar K.V p9stat_free(st); 1488b3cbea03SAneesh Kumar K.V kfree(st); 1489b3cbea03SAneesh Kumar K.V return 0; 1490b3cbea03SAneesh Kumar K.V } 1491b3cbea03SAneesh Kumar K.V 14929b6533c9SSripathi Kodi static const struct inode_operations v9fs_dir_inode_operations_dotu = { 14939b6533c9SSripathi Kodi .create = v9fs_vfs_create, 14949b6533c9SSripathi Kodi .lookup = v9fs_vfs_lookup, 14959b6533c9SSripathi Kodi .symlink = v9fs_vfs_symlink, 149650cc42ffSVenkateswararao Jujjuri (JV) .link = v9fs_vfs_link, 14979b6533c9SSripathi Kodi .unlink = v9fs_vfs_unlink, 14989b6533c9SSripathi Kodi .mkdir = v9fs_vfs_mkdir, 14999b6533c9SSripathi Kodi .rmdir = v9fs_vfs_rmdir, 15001d76e313SAneesh Kumar K.V .mknod = v9fs_vfs_mknod, 15019b6533c9SSripathi Kodi .rename = v9fs_vfs_rename, 15029b6533c9SSripathi Kodi .getattr = v9fs_vfs_getattr, 15039b6533c9SSripathi Kodi .setattr = v9fs_vfs_setattr, 15049b6533c9SSripathi Kodi }; 15059b6533c9SSripathi Kodi 1506754661f1SArjan van de Ven static const struct inode_operations v9fs_dir_inode_operations = { 1507b501611aSEric Van Hensbergen .create = v9fs_vfs_create, 1508b501611aSEric Van Hensbergen .lookup = v9fs_vfs_lookup, 1509b501611aSEric Van Hensbergen .unlink = v9fs_vfs_unlink, 1510b501611aSEric Van Hensbergen .mkdir = v9fs_vfs_mkdir, 1511b501611aSEric Van Hensbergen .rmdir = v9fs_vfs_rmdir, 1512b501611aSEric Van Hensbergen .mknod = v9fs_vfs_mknod, 1513b501611aSEric Van Hensbergen .rename = v9fs_vfs_rename, 1514b501611aSEric Van Hensbergen .getattr = v9fs_vfs_getattr, 1515b501611aSEric Van Hensbergen .setattr = v9fs_vfs_setattr, 1516b501611aSEric Van Hensbergen }; 1517b501611aSEric Van Hensbergen 1518754661f1SArjan van de Ven static const struct inode_operations v9fs_file_inode_operations = { 15192bad8471SEric Van Hensbergen .getattr = v9fs_vfs_getattr, 15202bad8471SEric Van Hensbergen .setattr = v9fs_vfs_setattr, 15212bad8471SEric Van Hensbergen }; 15222bad8471SEric Van Hensbergen 1523754661f1SArjan van de Ven static const struct inode_operations v9fs_symlink_inode_operations = { 1524204f2f0eSAl Viro .readlink = generic_readlink, 15252bad8471SEric Van Hensbergen .follow_link = v9fs_vfs_follow_link, 15262bad8471SEric Van Hensbergen .put_link = v9fs_vfs_put_link, 15272bad8471SEric Van Hensbergen .getattr = v9fs_vfs_getattr, 15282bad8471SEric Van Hensbergen .setattr = v9fs_vfs_setattr, 15292bad8471SEric Van Hensbergen }; 15309b6533c9SSripathi Kodi 1531