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 262bad8471SEric Van Hensbergen #include <linux/module.h> 272bad8471SEric Van Hensbergen #include <linux/errno.h> 282bad8471SEric Van Hensbergen #include <linux/fs.h> 292bad8471SEric Van Hensbergen #include <linux/file.h> 302bad8471SEric Van Hensbergen #include <linux/pagemap.h> 312bad8471SEric Van Hensbergen #include <linux/stat.h> 322bad8471SEric Van Hensbergen #include <linux/string.h> 332bad8471SEric Van Hensbergen #include <linux/inet.h> 342bad8471SEric Van Hensbergen #include <linux/namei.h> 352bad8471SEric Van Hensbergen #include <linux/idr.h> 36e8edc6e0SAlexey Dobriyan #include <linux/sched.h> 375a0e3ad6STejun Heo #include <linux/slab.h> 38ebf46264SAneesh Kumar K.V #include <linux/xattr.h> 3985ff872dSAneesh Kumar K.V #include <linux/posix_acl.h> 40bd238fb4SLatchesar Ionkov #include <net/9p/9p.h> 41bd238fb4SLatchesar Ionkov #include <net/9p/client.h> 422bad8471SEric Van Hensbergen 432bad8471SEric Van Hensbergen #include "v9fs.h" 442bad8471SEric Van Hensbergen #include "v9fs_vfs.h" 452bad8471SEric Van Hensbergen #include "fid.h" 4660e78d2cSAbhishek Kulkarni #include "cache.h" 47ebf46264SAneesh Kumar K.V #include "xattr.h" 4885ff872dSAneesh Kumar K.V #include "acl.h" 492bad8471SEric Van Hensbergen 50754661f1SArjan van de Ven static const struct inode_operations v9fs_dir_inode_operations; 519b6533c9SSripathi Kodi static const struct inode_operations v9fs_dir_inode_operations_dotu; 52754661f1SArjan van de Ven static const struct inode_operations v9fs_file_inode_operations; 53754661f1SArjan van de Ven static const struct inode_operations v9fs_symlink_inode_operations; 54f5fc6145SAneesh Kumar K.V 552bad8471SEric Van Hensbergen /** 562bad8471SEric Van Hensbergen * unixmode2p9mode - convert unix mode bits to plan 9 572bad8471SEric Van Hensbergen * @v9ses: v9fs session information 582bad8471SEric Van Hensbergen * @mode: mode to convert 592bad8471SEric Van Hensbergen * 602bad8471SEric Van Hensbergen */ 612bad8471SEric Van Hensbergen 6273c592b9SEric Van Hensbergen static int unixmode2p9mode(struct v9fs_session_info *v9ses, int mode) 632bad8471SEric Van Hensbergen { 642bad8471SEric Van Hensbergen int res; 652bad8471SEric Van Hensbergen res = mode & 0777; 662bad8471SEric Van Hensbergen if (S_ISDIR(mode)) 67bd238fb4SLatchesar Ionkov res |= P9_DMDIR; 68dd6102fbSSripathi Kodi if (v9fs_proto_dotu(v9ses)) { 692bad8471SEric Van Hensbergen if (S_ISLNK(mode)) 70bd238fb4SLatchesar Ionkov res |= P9_DMSYMLINK; 712bad8471SEric Van Hensbergen if (v9ses->nodev == 0) { 722bad8471SEric Van Hensbergen if (S_ISSOCK(mode)) 73bd238fb4SLatchesar Ionkov res |= P9_DMSOCKET; 742bad8471SEric Van Hensbergen if (S_ISFIFO(mode)) 75bd238fb4SLatchesar Ionkov res |= P9_DMNAMEDPIPE; 762bad8471SEric Van Hensbergen if (S_ISBLK(mode)) 77bd238fb4SLatchesar Ionkov res |= P9_DMDEVICE; 782bad8471SEric Van Hensbergen if (S_ISCHR(mode)) 79bd238fb4SLatchesar Ionkov res |= P9_DMDEVICE; 802bad8471SEric Van Hensbergen } 812bad8471SEric Van Hensbergen 822bad8471SEric Van Hensbergen if ((mode & S_ISUID) == S_ISUID) 83bd238fb4SLatchesar Ionkov res |= P9_DMSETUID; 842bad8471SEric Van Hensbergen if ((mode & S_ISGID) == S_ISGID) 85bd238fb4SLatchesar Ionkov res |= P9_DMSETGID; 86d199d652SAnthony Liguori if ((mode & S_ISVTX) == S_ISVTX) 87d199d652SAnthony Liguori res |= P9_DMSETVTX; 88bd238fb4SLatchesar Ionkov if ((mode & P9_DMLINK)) 89bd238fb4SLatchesar Ionkov res |= P9_DMLINK; 902bad8471SEric Van Hensbergen } 912bad8471SEric Van Hensbergen 922bad8471SEric Van Hensbergen return res; 932bad8471SEric Van Hensbergen } 942bad8471SEric Van Hensbergen 952bad8471SEric Van Hensbergen /** 962bad8471SEric Van Hensbergen * p9mode2unixmode- convert plan9 mode bits to unix mode bits 972bad8471SEric Van Hensbergen * @v9ses: v9fs session information 982bad8471SEric Van Hensbergen * @mode: mode to convert 992bad8471SEric Van Hensbergen * 1002bad8471SEric Van Hensbergen */ 1012bad8471SEric Van Hensbergen 10273c592b9SEric Van Hensbergen static int p9mode2unixmode(struct v9fs_session_info *v9ses, int mode) 1032bad8471SEric Van Hensbergen { 1042bad8471SEric Van Hensbergen int res; 1052bad8471SEric Van Hensbergen 1062bad8471SEric Van Hensbergen res = mode & 0777; 1072bad8471SEric Van Hensbergen 108bd238fb4SLatchesar Ionkov if ((mode & P9_DMDIR) == P9_DMDIR) 1092bad8471SEric Van Hensbergen res |= S_IFDIR; 110dd6102fbSSripathi Kodi else if ((mode & P9_DMSYMLINK) && (v9fs_proto_dotu(v9ses))) 1112bad8471SEric Van Hensbergen res |= S_IFLNK; 112dd6102fbSSripathi Kodi else if ((mode & P9_DMSOCKET) && (v9fs_proto_dotu(v9ses)) 1132bad8471SEric Van Hensbergen && (v9ses->nodev == 0)) 1142bad8471SEric Van Hensbergen res |= S_IFSOCK; 115dd6102fbSSripathi Kodi else if ((mode & P9_DMNAMEDPIPE) && (v9fs_proto_dotu(v9ses)) 1162bad8471SEric Van Hensbergen && (v9ses->nodev == 0)) 1172bad8471SEric Van Hensbergen res |= S_IFIFO; 118dd6102fbSSripathi Kodi else if ((mode & P9_DMDEVICE) && (v9fs_proto_dotu(v9ses)) 1192bad8471SEric Van Hensbergen && (v9ses->nodev == 0)) 1202bad8471SEric Van Hensbergen res |= S_IFBLK; 1212bad8471SEric Van Hensbergen else 1222bad8471SEric Van Hensbergen res |= S_IFREG; 1232bad8471SEric Van Hensbergen 124dd6102fbSSripathi Kodi if (v9fs_proto_dotu(v9ses)) { 125bd238fb4SLatchesar Ionkov if ((mode & P9_DMSETUID) == P9_DMSETUID) 1262bad8471SEric Van Hensbergen res |= S_ISUID; 1272bad8471SEric Van Hensbergen 128bd238fb4SLatchesar Ionkov if ((mode & P9_DMSETGID) == P9_DMSETGID) 1292bad8471SEric Van Hensbergen res |= S_ISGID; 130d199d652SAnthony Liguori 131d199d652SAnthony Liguori if ((mode & P9_DMSETVTX) == P9_DMSETVTX) 132d199d652SAnthony Liguori res |= S_ISVTX; 1332bad8471SEric Van Hensbergen } 1342bad8471SEric Van Hensbergen 1352bad8471SEric Van Hensbergen return res; 1362bad8471SEric Van Hensbergen } 1372bad8471SEric Van Hensbergen 138ee443996SEric Van Hensbergen /** 139ee443996SEric Van Hensbergen * v9fs_uflags2omode- convert posix open flags to plan 9 mode bits 140ee443996SEric Van Hensbergen * @uflags: flags to convert 1412e4bef41SEric Van Hensbergen * @extended: if .u extensions are active 142ee443996SEric Van Hensbergen */ 143ee443996SEric Van Hensbergen 1442e4bef41SEric Van Hensbergen int v9fs_uflags2omode(int uflags, int extended) 1456a3124a3SLatchesar Ionkov { 1466a3124a3SLatchesar Ionkov int ret; 1476a3124a3SLatchesar Ionkov 1486a3124a3SLatchesar Ionkov ret = 0; 1496a3124a3SLatchesar Ionkov switch (uflags&3) { 1506a3124a3SLatchesar Ionkov default: 1516a3124a3SLatchesar Ionkov case O_RDONLY: 152bd238fb4SLatchesar Ionkov ret = P9_OREAD; 1536a3124a3SLatchesar Ionkov break; 1546a3124a3SLatchesar Ionkov 1556a3124a3SLatchesar Ionkov case O_WRONLY: 156bd238fb4SLatchesar Ionkov ret = P9_OWRITE; 1576a3124a3SLatchesar Ionkov break; 1586a3124a3SLatchesar Ionkov 1596a3124a3SLatchesar Ionkov case O_RDWR: 160bd238fb4SLatchesar Ionkov ret = P9_ORDWR; 1616a3124a3SLatchesar Ionkov break; 1626a3124a3SLatchesar Ionkov } 1636a3124a3SLatchesar Ionkov 1646a3124a3SLatchesar Ionkov if (uflags & O_TRUNC) 165bd238fb4SLatchesar Ionkov ret |= P9_OTRUNC; 1666a3124a3SLatchesar Ionkov 1672e4bef41SEric Van Hensbergen if (extended) { 1682e4bef41SEric Van Hensbergen if (uflags & O_EXCL) 1692e4bef41SEric Van Hensbergen ret |= P9_OEXCL; 1702e4bef41SEric Van Hensbergen 1716a3124a3SLatchesar Ionkov if (uflags & O_APPEND) 172bd238fb4SLatchesar Ionkov ret |= P9_OAPPEND; 1732e4bef41SEric Van Hensbergen } 1746a3124a3SLatchesar Ionkov 1756a3124a3SLatchesar Ionkov return ret; 1766a3124a3SLatchesar Ionkov } 1776a3124a3SLatchesar Ionkov 1782bad8471SEric Van Hensbergen /** 179531b1094SLatchesar Ionkov * v9fs_blank_wstat - helper function to setup a 9P stat structure 180531b1094SLatchesar Ionkov * @wstat: structure to initialize 1812bad8471SEric Van Hensbergen * 1822bad8471SEric Van Hensbergen */ 1832bad8471SEric Van Hensbergen 1847a4439c4SM. Mohan Kumar void 185bd238fb4SLatchesar Ionkov v9fs_blank_wstat(struct p9_wstat *wstat) 1862bad8471SEric Van Hensbergen { 187531b1094SLatchesar Ionkov wstat->type = ~0; 188531b1094SLatchesar Ionkov wstat->dev = ~0; 189531b1094SLatchesar Ionkov wstat->qid.type = ~0; 190531b1094SLatchesar Ionkov wstat->qid.version = ~0; 191531b1094SLatchesar Ionkov *((long long *)&wstat->qid.path) = ~0; 192531b1094SLatchesar Ionkov wstat->mode = ~0; 193531b1094SLatchesar Ionkov wstat->atime = ~0; 194531b1094SLatchesar Ionkov wstat->mtime = ~0; 195531b1094SLatchesar Ionkov wstat->length = ~0; 196531b1094SLatchesar Ionkov wstat->name = NULL; 197531b1094SLatchesar Ionkov wstat->uid = NULL; 198531b1094SLatchesar Ionkov wstat->gid = NULL; 199531b1094SLatchesar Ionkov wstat->muid = NULL; 200531b1094SLatchesar Ionkov wstat->n_uid = ~0; 201531b1094SLatchesar Ionkov wstat->n_gid = ~0; 202531b1094SLatchesar Ionkov wstat->n_muid = ~0; 203531b1094SLatchesar Ionkov wstat->extension = NULL; 2042bad8471SEric Van Hensbergen } 2052bad8471SEric Van Hensbergen 20660e78d2cSAbhishek Kulkarni /** 20760e78d2cSAbhishek Kulkarni * v9fs_alloc_inode - helper function to allocate an inode 20860e78d2cSAbhishek Kulkarni * 20960e78d2cSAbhishek Kulkarni */ 21060e78d2cSAbhishek Kulkarni struct inode *v9fs_alloc_inode(struct super_block *sb) 21160e78d2cSAbhishek Kulkarni { 212a78ce05dSAneesh Kumar K.V struct v9fs_inode *v9inode; 213a78ce05dSAneesh Kumar K.V v9inode = (struct v9fs_inode *)kmem_cache_alloc(v9fs_inode_cache, 21460e78d2cSAbhishek Kulkarni GFP_KERNEL); 215a78ce05dSAneesh Kumar K.V if (!v9inode) 21660e78d2cSAbhishek Kulkarni return NULL; 217a78ce05dSAneesh Kumar K.V #ifdef CONFIG_9P_FSCACHE 218a78ce05dSAneesh Kumar K.V v9inode->fscache = NULL; 219a78ce05dSAneesh Kumar K.V v9inode->fscache_key = NULL; 220a78ce05dSAneesh Kumar K.V spin_lock_init(&v9inode->fscache_lock); 221a78ce05dSAneesh Kumar K.V #endif 2226b39f6d2SAneesh Kumar K.V v9inode->writeback_fid = NULL; 223b3cbea03SAneesh Kumar K.V v9inode->cache_validity = 0; 224a78ce05dSAneesh Kumar K.V return &v9inode->vfs_inode; 22560e78d2cSAbhishek Kulkarni } 22660e78d2cSAbhishek Kulkarni 22760e78d2cSAbhishek Kulkarni /** 22860e78d2cSAbhishek Kulkarni * v9fs_destroy_inode - destroy an inode 22960e78d2cSAbhishek Kulkarni * 23060e78d2cSAbhishek Kulkarni */ 23160e78d2cSAbhishek Kulkarni 232fa0d7e3dSNick Piggin static void v9fs_i_callback(struct rcu_head *head) 233fa0d7e3dSNick Piggin { 234fa0d7e3dSNick Piggin struct inode *inode = container_of(head, struct inode, i_rcu); 235fa0d7e3dSNick Piggin INIT_LIST_HEAD(&inode->i_dentry); 236a78ce05dSAneesh Kumar K.V kmem_cache_free(v9fs_inode_cache, V9FS_I(inode)); 237fa0d7e3dSNick Piggin } 238fa0d7e3dSNick Piggin 23960e78d2cSAbhishek Kulkarni void v9fs_destroy_inode(struct inode *inode) 24060e78d2cSAbhishek Kulkarni { 241fa0d7e3dSNick Piggin call_rcu(&inode->i_rcu, v9fs_i_callback); 24260e78d2cSAbhishek Kulkarni } 24360e78d2cSAbhishek Kulkarni 2445ffc0cb3SAneesh Kumar K.V int v9fs_init_inode(struct v9fs_session_info *v9ses, 2455ffc0cb3SAneesh Kumar K.V struct inode *inode, int mode) 2462bad8471SEric Van Hensbergen { 2475ffc0cb3SAneesh Kumar K.V int err = 0; 2482bb54115SAbhishek Kulkarni 249217f206dSDmitry Monakhov inode_init_owner(inode, NULL, mode); 2502bad8471SEric Van Hensbergen inode->i_blocks = 0; 2512bad8471SEric Van Hensbergen inode->i_rdev = 0; 2522bad8471SEric Van Hensbergen inode->i_atime = inode->i_mtime = inode->i_ctime = CURRENT_TIME; 253147b31cfSEric Van Hensbergen inode->i_mapping->a_ops = &v9fs_addr_operations; 2542bad8471SEric Van Hensbergen 2552bad8471SEric Van Hensbergen switch (mode & S_IFMT) { 2562bad8471SEric Van Hensbergen case S_IFIFO: 2572bad8471SEric Van Hensbergen case S_IFBLK: 2582bad8471SEric Van Hensbergen case S_IFCHR: 2592bad8471SEric Van Hensbergen case S_IFSOCK: 2604b43516aSM. Mohan Kumar if (v9fs_proto_dotl(v9ses)) { 2614b43516aSM. Mohan Kumar inode->i_op = &v9fs_file_inode_operations_dotl; 2624b43516aSM. Mohan Kumar inode->i_fop = &v9fs_file_operations_dotl; 2634b43516aSM. Mohan Kumar } else if (v9fs_proto_dotu(v9ses)) { 2644b43516aSM. Mohan Kumar inode->i_op = &v9fs_file_inode_operations; 2654b43516aSM. Mohan Kumar inode->i_fop = &v9fs_file_operations; 2664b43516aSM. Mohan Kumar } else { 267bd238fb4SLatchesar Ionkov P9_DPRINTK(P9_DEBUG_ERROR, 268bd238fb4SLatchesar Ionkov "special files without extended mode\n"); 2692bb54115SAbhishek Kulkarni err = -EINVAL; 2702bb54115SAbhishek Kulkarni goto error; 271b501611aSEric Van Hensbergen } 2722bb54115SAbhishek Kulkarni init_special_inode(inode, inode->i_mode, inode->i_rdev); 2735d58bec5SEric Van Hensbergen break; 2742bad8471SEric Van Hensbergen case S_IFREG: 2759b6533c9SSripathi Kodi if (v9fs_proto_dotl(v9ses)) { 2769b6533c9SSripathi Kodi inode->i_op = &v9fs_file_inode_operations_dotl; 27729236f4eSAneesh Kumar K.V if (v9ses->cache) 27829236f4eSAneesh Kumar K.V inode->i_fop = 27929236f4eSAneesh Kumar K.V &v9fs_cached_file_operations_dotl; 28029236f4eSAneesh Kumar K.V else 2819b6533c9SSripathi Kodi inode->i_fop = &v9fs_file_operations_dotl; 2829b6533c9SSripathi Kodi } else { 2832bad8471SEric Van Hensbergen inode->i_op = &v9fs_file_inode_operations; 28429236f4eSAneesh Kumar K.V if (v9ses->cache) 28529236f4eSAneesh Kumar K.V inode->i_fop = &v9fs_cached_file_operations; 28629236f4eSAneesh Kumar K.V else 2872bad8471SEric Van Hensbergen inode->i_fop = &v9fs_file_operations; 2889b6533c9SSripathi Kodi } 2899b6533c9SSripathi Kodi 2902bad8471SEric Van Hensbergen break; 291b501611aSEric Van Hensbergen case S_IFLNK: 2929b6533c9SSripathi Kodi if (!v9fs_proto_dotu(v9ses) && !v9fs_proto_dotl(v9ses)) { 2939b6533c9SSripathi Kodi P9_DPRINTK(P9_DEBUG_ERROR, "extended modes used with " 2949b6533c9SSripathi Kodi "legacy protocol.\n"); 2952bb54115SAbhishek Kulkarni err = -EINVAL; 2962bb54115SAbhishek Kulkarni goto error; 297b501611aSEric Van Hensbergen } 2989b6533c9SSripathi Kodi 2999b6533c9SSripathi Kodi if (v9fs_proto_dotl(v9ses)) 3009b6533c9SSripathi Kodi inode->i_op = &v9fs_symlink_inode_operations_dotl; 3019b6533c9SSripathi Kodi else 302b501611aSEric Van Hensbergen inode->i_op = &v9fs_symlink_inode_operations; 3039b6533c9SSripathi Kodi 304b501611aSEric Van Hensbergen break; 3052bad8471SEric Van Hensbergen case S_IFDIR: 306d8c76e6fSDave Hansen inc_nlink(inode); 3079b6533c9SSripathi Kodi if (v9fs_proto_dotl(v9ses)) 3089b6533c9SSripathi Kodi inode->i_op = &v9fs_dir_inode_operations_dotl; 3099b6533c9SSripathi Kodi else if (v9fs_proto_dotu(v9ses)) 3109b6533c9SSripathi Kodi inode->i_op = &v9fs_dir_inode_operations_dotu; 311b501611aSEric Van Hensbergen else 3122bad8471SEric Van Hensbergen inode->i_op = &v9fs_dir_inode_operations; 3139b6533c9SSripathi Kodi 3149b6533c9SSripathi Kodi if (v9fs_proto_dotl(v9ses)) 3159b6533c9SSripathi Kodi inode->i_fop = &v9fs_dir_operations_dotl; 3169b6533c9SSripathi Kodi else 3172bad8471SEric Van Hensbergen inode->i_fop = &v9fs_dir_operations; 3189b6533c9SSripathi Kodi 3192bad8471SEric Van Hensbergen break; 3202bad8471SEric Van Hensbergen default: 3212bb54115SAbhishek Kulkarni P9_DPRINTK(P9_DEBUG_ERROR, "BAD mode 0x%x S_IFMT 0x%x\n", 3222bad8471SEric Van Hensbergen mode, mode & S_IFMT); 3232bb54115SAbhishek Kulkarni err = -EINVAL; 3242bb54115SAbhishek Kulkarni goto error; 3252bad8471SEric Van Hensbergen } 3262bb54115SAbhishek Kulkarni error: 3275ffc0cb3SAneesh Kumar K.V return err; 3285ffc0cb3SAneesh Kumar K.V 3295ffc0cb3SAneesh Kumar K.V } 3305ffc0cb3SAneesh Kumar K.V 3315ffc0cb3SAneesh Kumar K.V /** 3325ffc0cb3SAneesh Kumar K.V * v9fs_get_inode - helper function to setup an inode 3335ffc0cb3SAneesh Kumar K.V * @sb: superblock 3345ffc0cb3SAneesh Kumar K.V * @mode: mode to setup inode with 3355ffc0cb3SAneesh Kumar K.V * 3365ffc0cb3SAneesh Kumar K.V */ 3375ffc0cb3SAneesh Kumar K.V 3385ffc0cb3SAneesh Kumar K.V struct inode *v9fs_get_inode(struct super_block *sb, int mode) 3395ffc0cb3SAneesh Kumar K.V { 3405ffc0cb3SAneesh Kumar K.V int err; 3415ffc0cb3SAneesh Kumar K.V struct inode *inode; 3425ffc0cb3SAneesh Kumar K.V struct v9fs_session_info *v9ses = sb->s_fs_info; 3435ffc0cb3SAneesh Kumar K.V 3445ffc0cb3SAneesh Kumar K.V P9_DPRINTK(P9_DEBUG_VFS, "super block: %p mode: %o\n", sb, mode); 3455ffc0cb3SAneesh Kumar K.V 3465ffc0cb3SAneesh Kumar K.V inode = new_inode(sb); 3475ffc0cb3SAneesh Kumar K.V if (!inode) { 3485ffc0cb3SAneesh Kumar K.V P9_EPRINTK(KERN_WARNING, "Problem allocating inode\n"); 3495ffc0cb3SAneesh Kumar K.V return ERR_PTR(-ENOMEM); 3505ffc0cb3SAneesh Kumar K.V } 3515ffc0cb3SAneesh Kumar K.V err = v9fs_init_inode(v9ses, inode, mode); 3525ffc0cb3SAneesh Kumar K.V if (err) { 3532bb54115SAbhishek Kulkarni iput(inode); 3542bb54115SAbhishek Kulkarni return ERR_PTR(err); 3552bad8471SEric Van Hensbergen } 3565ffc0cb3SAneesh Kumar K.V return inode; 3575ffc0cb3SAneesh Kumar K.V } 3582bad8471SEric Van Hensbergen 359bd238fb4SLatchesar Ionkov /* 3606a3124a3SLatchesar Ionkov static struct v9fs_fid* 3616a3124a3SLatchesar Ionkov v9fs_clone_walk(struct v9fs_session_info *v9ses, u32 fid, struct dentry *dentry) 3626a3124a3SLatchesar Ionkov { 3636a3124a3SLatchesar Ionkov int err; 364736c4b85SMika Kukkonen int nfid; 3656a3124a3SLatchesar Ionkov struct v9fs_fid *ret; 3666a3124a3SLatchesar Ionkov struct v9fs_fcall *fcall; 3670b8dd177SLatchesar Ionkov 3686a3124a3SLatchesar Ionkov nfid = v9fs_get_idpool(&v9ses->fidpool); 3696a3124a3SLatchesar Ionkov if (nfid < 0) { 3700b8dd177SLatchesar Ionkov eprintk(KERN_WARNING, "no free fids available\n"); 371731805b4SLatchesar Ionkov return ERR_PTR(-ENOSPC); 3720b8dd177SLatchesar Ionkov } 3730b8dd177SLatchesar Ionkov 3746a3124a3SLatchesar Ionkov err = v9fs_t_walk(v9ses, fid, nfid, (char *) dentry->d_name.name, 3756a3124a3SLatchesar Ionkov &fcall); 3766a3124a3SLatchesar Ionkov 3776a3124a3SLatchesar Ionkov if (err < 0) { 37841e5a6acSLatchesar Ionkov if (fcall && fcall->id == RWALK) 37941e5a6acSLatchesar Ionkov goto clunk_fid; 38041e5a6acSLatchesar Ionkov 3816a3124a3SLatchesar Ionkov PRINT_FCALL_ERROR("walk error", fcall); 3826a3124a3SLatchesar Ionkov v9fs_put_idpool(nfid, &v9ses->fidpool); 3836a3124a3SLatchesar Ionkov goto error; 3840b8dd177SLatchesar Ionkov } 3856a3124a3SLatchesar Ionkov 3863cf6429aSLatchesar Ionkov kfree(fcall); 3873cf6429aSLatchesar Ionkov fcall = NULL; 3886a3124a3SLatchesar Ionkov ret = v9fs_fid_create(v9ses, nfid); 3896a3124a3SLatchesar Ionkov if (!ret) { 3906a3124a3SLatchesar Ionkov err = -ENOMEM; 3916a3124a3SLatchesar Ionkov goto clunk_fid; 3920b8dd177SLatchesar Ionkov } 3932bad8471SEric Van Hensbergen 3946a3124a3SLatchesar Ionkov err = v9fs_fid_insert(ret, dentry); 3956a3124a3SLatchesar Ionkov if (err < 0) { 3966a3124a3SLatchesar Ionkov v9fs_fid_destroy(ret); 3976a3124a3SLatchesar Ionkov goto clunk_fid; 3986a3124a3SLatchesar Ionkov } 3992bad8471SEric Van Hensbergen 4006a3124a3SLatchesar Ionkov return ret; 4016a3124a3SLatchesar Ionkov 4026a3124a3SLatchesar Ionkov clunk_fid: 4036a3124a3SLatchesar Ionkov v9fs_t_clunk(v9ses, nfid); 4046a3124a3SLatchesar Ionkov 4056a3124a3SLatchesar Ionkov error: 4066a3124a3SLatchesar Ionkov kfree(fcall); 4076a3124a3SLatchesar Ionkov return ERR_PTR(err); 4086a3124a3SLatchesar Ionkov } 409bd238fb4SLatchesar Ionkov */ 4106a3124a3SLatchesar Ionkov 41160e78d2cSAbhishek Kulkarni 41260e78d2cSAbhishek Kulkarni /** 41360e78d2cSAbhishek Kulkarni * v9fs_clear_inode - release an inode 41460e78d2cSAbhishek Kulkarni * @inode: inode to release 41560e78d2cSAbhishek Kulkarni * 41660e78d2cSAbhishek Kulkarni */ 417b57922d9SAl Viro void v9fs_evict_inode(struct inode *inode) 41860e78d2cSAbhishek Kulkarni { 4196b39f6d2SAneesh Kumar K.V struct v9fs_inode *v9inode = V9FS_I(inode); 4206b39f6d2SAneesh Kumar K.V 421b57922d9SAl Viro truncate_inode_pages(inode->i_mapping, 0); 422b57922d9SAl Viro end_writeback(inode); 42360e78d2cSAbhishek Kulkarni filemap_fdatawrite(inode->i_mapping); 42460e78d2cSAbhishek Kulkarni 42560e78d2cSAbhishek Kulkarni #ifdef CONFIG_9P_FSCACHE 42660e78d2cSAbhishek Kulkarni v9fs_cache_inode_put_cookie(inode); 42760e78d2cSAbhishek Kulkarni #endif 4286b39f6d2SAneesh Kumar K.V /* clunk the fid stashed in writeback_fid */ 4296b39f6d2SAneesh Kumar K.V if (v9inode->writeback_fid) { 4306b39f6d2SAneesh Kumar K.V p9_client_clunk(v9inode->writeback_fid); 4316b39f6d2SAneesh Kumar K.V v9inode->writeback_fid = NULL; 4323cf387d7SAneesh Kumar K.V } 43360e78d2cSAbhishek Kulkarni } 43460e78d2cSAbhishek Kulkarni 4355ffc0cb3SAneesh Kumar K.V static struct inode *v9fs_qid_iget(struct super_block *sb, 4365ffc0cb3SAneesh Kumar K.V struct p9_qid *qid, 4375ffc0cb3SAneesh Kumar K.V struct p9_wstat *st) 4385ffc0cb3SAneesh Kumar K.V { 4395ffc0cb3SAneesh Kumar K.V int retval, umode; 4405ffc0cb3SAneesh Kumar K.V unsigned long i_ino; 4415ffc0cb3SAneesh Kumar K.V struct inode *inode; 4425ffc0cb3SAneesh Kumar K.V struct v9fs_session_info *v9ses = sb->s_fs_info; 4435ffc0cb3SAneesh Kumar K.V 4445ffc0cb3SAneesh Kumar K.V i_ino = v9fs_qid2ino(qid); 4455ffc0cb3SAneesh Kumar K.V inode = iget_locked(sb, i_ino); 4465ffc0cb3SAneesh Kumar K.V if (!inode) 4475ffc0cb3SAneesh Kumar K.V return ERR_PTR(-ENOMEM); 4485ffc0cb3SAneesh Kumar K.V if (!(inode->i_state & I_NEW)) 4495ffc0cb3SAneesh Kumar K.V return inode; 4505ffc0cb3SAneesh Kumar K.V /* 4515ffc0cb3SAneesh Kumar K.V * initialize the inode with the stat info 4525ffc0cb3SAneesh Kumar K.V * FIXME!! we may need support for stale inodes 4535ffc0cb3SAneesh Kumar K.V * later. 4545ffc0cb3SAneesh Kumar K.V */ 4555ffc0cb3SAneesh Kumar K.V umode = p9mode2unixmode(v9ses, st->mode); 4565ffc0cb3SAneesh Kumar K.V retval = v9fs_init_inode(v9ses, inode, umode); 4575ffc0cb3SAneesh Kumar K.V if (retval) 4585ffc0cb3SAneesh Kumar K.V goto error; 4595ffc0cb3SAneesh Kumar K.V 4605ffc0cb3SAneesh Kumar K.V v9fs_stat2inode(st, inode, sb); 4615ffc0cb3SAneesh Kumar K.V #ifdef CONFIG_9P_FSCACHE 462a78ce05dSAneesh Kumar K.V v9fs_fscache_set_key(inode, &st->qid); 4635ffc0cb3SAneesh Kumar K.V v9fs_cache_inode_get_cookie(inode); 4645ffc0cb3SAneesh Kumar K.V #endif 4655ffc0cb3SAneesh Kumar K.V unlock_new_inode(inode); 4665ffc0cb3SAneesh Kumar K.V return inode; 4675ffc0cb3SAneesh Kumar K.V error: 4685ffc0cb3SAneesh Kumar K.V unlock_new_inode(inode); 4695ffc0cb3SAneesh Kumar K.V iput(inode); 4705ffc0cb3SAneesh Kumar K.V return ERR_PTR(retval); 4715ffc0cb3SAneesh Kumar K.V 4725ffc0cb3SAneesh Kumar K.V } 4735ffc0cb3SAneesh Kumar K.V 47453c06f4eSAneesh Kumar K.V struct inode * 475a78ce05dSAneesh Kumar K.V v9fs_inode_from_fid(struct v9fs_session_info *v9ses, struct p9_fid *fid, 4766a3124a3SLatchesar Ionkov struct super_block *sb) 4776a3124a3SLatchesar Ionkov { 47851a87c55SEric Van Hensbergen struct p9_wstat *st; 4795ffc0cb3SAneesh Kumar K.V struct inode *inode = NULL; 4806a3124a3SLatchesar Ionkov 481bd238fb4SLatchesar Ionkov st = p9_client_stat(fid); 48202bc3567SAbhishek Kulkarni if (IS_ERR(st)) 48302bc3567SAbhishek Kulkarni return ERR_CAST(st); 4842bad8471SEric Van Hensbergen 4855ffc0cb3SAneesh Kumar K.V inode = v9fs_qid_iget(sb, &st->qid, st); 48602bc3567SAbhishek Kulkarni p9stat_free(st); 487bd238fb4SLatchesar Ionkov kfree(st); 4885ffc0cb3SAneesh Kumar K.V return inode; 4892bad8471SEric Van Hensbergen } 4902bad8471SEric Van Hensbergen 4912bad8471SEric Van Hensbergen /** 4922bad8471SEric Van Hensbergen * v9fs_remove - helper function to remove files and directories 49373c592b9SEric Van Hensbergen * @dir: directory inode that is being deleted 49473c592b9SEric Van Hensbergen * @file: dentry that is being deleted 49573c592b9SEric Van Hensbergen * @rmdir: removing a directory 4962bad8471SEric Van Hensbergen * 4972bad8471SEric Van Hensbergen */ 4982bad8471SEric Van Hensbergen 4992bad8471SEric Van Hensbergen static int v9fs_remove(struct inode *dir, struct dentry *file, int rmdir) 5002bad8471SEric Van Hensbergen { 501d994f405SAneesh Kumar K.V int retval; 502bd238fb4SLatchesar Ionkov struct p9_fid *v9fid; 503d28c61f0SAneesh Kumar K.V struct inode *file_inode; 5042bad8471SEric Van Hensbergen 505bd238fb4SLatchesar Ionkov P9_DPRINTK(P9_DEBUG_VFS, "inode: %p dentry: %p rmdir: %d\n", dir, file, 5062bad8471SEric Van Hensbergen rmdir); 5072bad8471SEric Van Hensbergen 5082bad8471SEric Van Hensbergen file_inode = file->d_inode; 509c959df9fSLatchesar Ionkov v9fid = v9fs_fid_clone(file); 510da977b2cSEric Van Hensbergen if (IS_ERR(v9fid)) 511da977b2cSEric Van Hensbergen return PTR_ERR(v9fid); 5122bad8471SEric Van Hensbergen 513d994f405SAneesh Kumar K.V retval = p9_client_remove(v9fid); 514b271ec47SAneesh Kumar K.V if (!retval) { 515b271ec47SAneesh Kumar K.V /* 516b271ec47SAneesh Kumar K.V * directories on unlink should have zero 517b271ec47SAneesh Kumar K.V * link count 518b271ec47SAneesh Kumar K.V */ 519b271ec47SAneesh Kumar K.V if (rmdir) { 520b271ec47SAneesh Kumar K.V clear_nlink(file_inode); 521b271ec47SAneesh Kumar K.V drop_nlink(dir); 522b271ec47SAneesh Kumar K.V } else 523d994f405SAneesh Kumar K.V drop_nlink(file_inode); 524d28c61f0SAneesh Kumar K.V 5253bc86de3SAneesh Kumar K.V v9fs_invalidate_inode_attr(file_inode); 526d28c61f0SAneesh Kumar K.V v9fs_invalidate_inode_attr(dir); 527b271ec47SAneesh Kumar K.V } 528d994f405SAneesh Kumar K.V return retval; 5292bad8471SEric Van Hensbergen } 5302bad8471SEric Van Hensbergen 531bd238fb4SLatchesar Ionkov /** 532bd238fb4SLatchesar Ionkov * v9fs_create - Create a file 533ee443996SEric Van Hensbergen * @v9ses: session information 534ee443996SEric Van Hensbergen * @dir: directory that dentry is being created in 535bd238fb4SLatchesar Ionkov * @dentry: dentry that is being created 5360e15597eSAbhishek Kulkarni * @extension: 9p2000.u extension string to support devices, etc. 537bd238fb4SLatchesar Ionkov * @perm: create permissions 538bd238fb4SLatchesar Ionkov * @mode: open mode 539bd238fb4SLatchesar Ionkov * 540bd238fb4SLatchesar Ionkov */ 541bd238fb4SLatchesar Ionkov static struct p9_fid * 542bd238fb4SLatchesar Ionkov v9fs_create(struct v9fs_session_info *v9ses, struct inode *dir, 543bd238fb4SLatchesar Ionkov struct dentry *dentry, char *extension, u32 perm, u8 mode) 544bd238fb4SLatchesar Ionkov { 545bd238fb4SLatchesar Ionkov int err; 546bd238fb4SLatchesar Ionkov char *name; 547bd238fb4SLatchesar Ionkov struct p9_fid *dfid, *ofid, *fid; 548bd238fb4SLatchesar Ionkov struct inode *inode; 549bd238fb4SLatchesar Ionkov 55051a87c55SEric Van Hensbergen P9_DPRINTK(P9_DEBUG_VFS, "name %s\n", dentry->d_name.name); 55151a87c55SEric Van Hensbergen 552bd238fb4SLatchesar Ionkov err = 0; 553bd238fb4SLatchesar Ionkov ofid = NULL; 554bd238fb4SLatchesar Ionkov fid = NULL; 555bd238fb4SLatchesar Ionkov name = (char *) dentry->d_name.name; 5566d27e64dSVenkateswararao Jujjuri dfid = v9fs_fid_lookup(dentry->d_parent); 557bd238fb4SLatchesar Ionkov if (IS_ERR(dfid)) { 558bd238fb4SLatchesar Ionkov err = PTR_ERR(dfid); 5596d27e64dSVenkateswararao Jujjuri P9_DPRINTK(P9_DEBUG_VFS, "fid lookup failed %d\n", err); 5606d27e64dSVenkateswararao Jujjuri return ERR_PTR(err); 561bd238fb4SLatchesar Ionkov } 562bd238fb4SLatchesar Ionkov 563bd238fb4SLatchesar Ionkov /* clone a fid to use for creation */ 564bd238fb4SLatchesar Ionkov ofid = p9_client_walk(dfid, 0, NULL, 1); 565bd238fb4SLatchesar Ionkov if (IS_ERR(ofid)) { 566bd238fb4SLatchesar Ionkov err = PTR_ERR(ofid); 56751a87c55SEric Van Hensbergen P9_DPRINTK(P9_DEBUG_VFS, "p9_client_walk failed %d\n", err); 5686d27e64dSVenkateswararao Jujjuri return ERR_PTR(err); 569bd238fb4SLatchesar Ionkov } 570bd238fb4SLatchesar Ionkov 571bd238fb4SLatchesar Ionkov err = p9_client_fcreate(ofid, name, perm, mode, extension); 57251a87c55SEric Van Hensbergen if (err < 0) { 57351a87c55SEric Van Hensbergen P9_DPRINTK(P9_DEBUG_VFS, "p9_client_fcreate failed %d\n", err); 574bd238fb4SLatchesar Ionkov goto error; 57551a87c55SEric Van Hensbergen } 576bd238fb4SLatchesar Ionkov 577bd238fb4SLatchesar Ionkov /* now walk from the parent so we can get unopened fid */ 5786d27e64dSVenkateswararao Jujjuri fid = p9_client_walk(dfid, 1, &name, 1); 579bd238fb4SLatchesar Ionkov if (IS_ERR(fid)) { 580bd238fb4SLatchesar Ionkov err = PTR_ERR(fid); 58151a87c55SEric Van Hensbergen P9_DPRINTK(P9_DEBUG_VFS, "p9_client_walk failed %d\n", err); 582bd238fb4SLatchesar Ionkov fid = NULL; 583bd238fb4SLatchesar Ionkov goto error; 5846d27e64dSVenkateswararao Jujjuri } 585bd238fb4SLatchesar Ionkov 586bd238fb4SLatchesar Ionkov /* instantiate inode and assign the unopened fid to the dentry */ 587a78ce05dSAneesh Kumar K.V inode = v9fs_get_inode_from_fid(v9ses, fid, dir->i_sb); 588bd238fb4SLatchesar Ionkov if (IS_ERR(inode)) { 589bd238fb4SLatchesar Ionkov err = PTR_ERR(inode); 59051a87c55SEric Van Hensbergen P9_DPRINTK(P9_DEBUG_VFS, "inode creation failed %d\n", err); 591bd238fb4SLatchesar Ionkov goto error; 592bd238fb4SLatchesar Ionkov } 593bd238fb4SLatchesar Ionkov d_instantiate(dentry, inode); 59450fb6d2bSAbhishek Kulkarni err = v9fs_fid_add(dentry, fid); 59550fb6d2bSAbhishek Kulkarni if (err < 0) 59650fb6d2bSAbhishek Kulkarni goto error; 59750fb6d2bSAbhishek Kulkarni 598bd238fb4SLatchesar Ionkov return ofid; 599bd238fb4SLatchesar Ionkov 600bd238fb4SLatchesar Ionkov error: 601bd238fb4SLatchesar Ionkov if (ofid) 602bd238fb4SLatchesar Ionkov p9_client_clunk(ofid); 603bd238fb4SLatchesar Ionkov 604bd238fb4SLatchesar Ionkov if (fid) 605bd238fb4SLatchesar Ionkov p9_client_clunk(fid); 606bd238fb4SLatchesar Ionkov 607bd238fb4SLatchesar Ionkov return ERR_PTR(err); 608bd238fb4SLatchesar Ionkov } 609bd238fb4SLatchesar Ionkov 6102bad8471SEric Van Hensbergen /** 6112bad8471SEric Van Hensbergen * v9fs_vfs_create - VFS hook to create files 612ee443996SEric Van Hensbergen * @dir: directory inode that is being created 6132bad8471SEric Van Hensbergen * @dentry: dentry that is being deleted 6146a3124a3SLatchesar Ionkov * @mode: create permissions 6152bad8471SEric Van Hensbergen * @nd: path information 6162bad8471SEric Van Hensbergen * 6172bad8471SEric Van Hensbergen */ 6182bad8471SEric Van Hensbergen 6192bad8471SEric Van Hensbergen static int 6206a3124a3SLatchesar Ionkov v9fs_vfs_create(struct inode *dir, struct dentry *dentry, int mode, 6212bad8471SEric Van Hensbergen struct nameidata *nd) 6222bad8471SEric Van Hensbergen { 6236a3124a3SLatchesar Ionkov int err; 624bd238fb4SLatchesar Ionkov u32 perm; 6256a3124a3SLatchesar Ionkov int flags; 6266b39f6d2SAneesh Kumar K.V struct file *filp; 6276b39f6d2SAneesh Kumar K.V struct v9fs_inode *v9inode; 6286a3124a3SLatchesar Ionkov struct v9fs_session_info *v9ses; 6293cf387d7SAneesh Kumar K.V struct p9_fid *fid, *inode_fid; 6306a3124a3SLatchesar Ionkov 631bd238fb4SLatchesar Ionkov err = 0; 632bd238fb4SLatchesar Ionkov fid = NULL; 6336a3124a3SLatchesar Ionkov v9ses = v9fs_inode2v9ses(dir); 634da977b2cSEric Van Hensbergen perm = unixmode2p9mode(v9ses, mode); 6356a3124a3SLatchesar Ionkov if (nd && nd->flags & LOOKUP_OPEN) 6366a3124a3SLatchesar Ionkov flags = nd->intent.open.flags - 1; 6376a3124a3SLatchesar Ionkov else 6386a3124a3SLatchesar Ionkov flags = O_RDWR; 6396a3124a3SLatchesar Ionkov 640bd238fb4SLatchesar Ionkov fid = v9fs_create(v9ses, dir, dentry, NULL, perm, 641dd6102fbSSripathi Kodi v9fs_uflags2omode(flags, 642dd6102fbSSripathi Kodi v9fs_proto_dotu(v9ses))); 643bd238fb4SLatchesar Ionkov if (IS_ERR(fid)) { 644bd238fb4SLatchesar Ionkov err = PTR_ERR(fid); 645bd238fb4SLatchesar Ionkov fid = NULL; 6466a3124a3SLatchesar Ionkov goto error; 6476a3124a3SLatchesar Ionkov } 6486a3124a3SLatchesar Ionkov 649d28c61f0SAneesh Kumar K.V v9fs_invalidate_inode_attr(dir); 650bd238fb4SLatchesar Ionkov /* if we are opening a file, assign the open fid to the file */ 6516a3124a3SLatchesar Ionkov if (nd && nd->flags & LOOKUP_OPEN) { 6526b39f6d2SAneesh Kumar K.V v9inode = V9FS_I(dentry->d_inode); 6536b39f6d2SAneesh Kumar K.V if (v9ses->cache && !v9inode->writeback_fid) { 6543cf387d7SAneesh Kumar K.V /* 6556b39f6d2SAneesh Kumar K.V * clone a fid and add it to writeback_fid 6563cf387d7SAneesh Kumar K.V * we do it during open time instead of 6573cf387d7SAneesh Kumar K.V * page dirty time via write_begin/page_mkwrite 6583cf387d7SAneesh Kumar K.V * because we want write after unlink usecase 6593cf387d7SAneesh Kumar K.V * to work. 6603cf387d7SAneesh Kumar K.V */ 6613cf387d7SAneesh Kumar K.V inode_fid = v9fs_writeback_fid(dentry); 6623cf387d7SAneesh Kumar K.V if (IS_ERR(inode_fid)) { 6633cf387d7SAneesh Kumar K.V err = PTR_ERR(inode_fid); 6643cf387d7SAneesh Kumar K.V goto error; 6653cf387d7SAneesh Kumar K.V } 6666b39f6d2SAneesh Kumar K.V v9inode->writeback_fid = (void *) inode_fid; 6673cf387d7SAneesh Kumar K.V } 668877cb3d4SAneesh Kumar K.V filp = lookup_instantiate_filp(nd, dentry, generic_file_open); 6696a3124a3SLatchesar Ionkov if (IS_ERR(filp)) { 670bd238fb4SLatchesar Ionkov err = PTR_ERR(filp); 671bd238fb4SLatchesar Ionkov goto error; 6726a3124a3SLatchesar Ionkov } 6736a3124a3SLatchesar Ionkov 674bd238fb4SLatchesar Ionkov filp->private_data = fid; 67546848de0SAneesh Kumar K.V #ifdef CONFIG_9P_FSCACHE 67646848de0SAneesh Kumar K.V if (v9ses->cache) 67746848de0SAneesh Kumar K.V v9fs_cache_inode_set_cookie(dentry->d_inode, filp); 67846848de0SAneesh Kumar K.V #endif 679bd238fb4SLatchesar Ionkov } else 680bd238fb4SLatchesar Ionkov p9_client_clunk(fid); 6816a3124a3SLatchesar Ionkov 6826a3124a3SLatchesar Ionkov return 0; 6836a3124a3SLatchesar Ionkov 6846a3124a3SLatchesar Ionkov error: 685bd238fb4SLatchesar Ionkov if (fid) 686bd238fb4SLatchesar Ionkov p9_client_clunk(fid); 6876a3124a3SLatchesar Ionkov 6886a3124a3SLatchesar Ionkov return err; 6892bad8471SEric Van Hensbergen } 6902bad8471SEric Van Hensbergen 6912bad8471SEric Van Hensbergen /** 6922bad8471SEric Van Hensbergen * v9fs_vfs_mkdir - VFS mkdir hook to create a directory 693ee443996SEric Van Hensbergen * @dir: inode that is being unlinked 6942bad8471SEric Van Hensbergen * @dentry: dentry that is being unlinked 6952bad8471SEric Van Hensbergen * @mode: mode for new directory 6962bad8471SEric Van Hensbergen * 6972bad8471SEric Van Hensbergen */ 6982bad8471SEric Van Hensbergen 6996a3124a3SLatchesar Ionkov static int v9fs_vfs_mkdir(struct inode *dir, struct dentry *dentry, int mode) 7002bad8471SEric Van Hensbergen { 7016a3124a3SLatchesar Ionkov int err; 702bd238fb4SLatchesar Ionkov u32 perm; 703bd238fb4SLatchesar Ionkov struct p9_fid *fid; 704d28c61f0SAneesh Kumar K.V struct v9fs_session_info *v9ses; 7056a3124a3SLatchesar Ionkov 706bd238fb4SLatchesar Ionkov P9_DPRINTK(P9_DEBUG_VFS, "name %s\n", dentry->d_name.name); 707bd238fb4SLatchesar Ionkov err = 0; 7086a3124a3SLatchesar Ionkov v9ses = v9fs_inode2v9ses(dir); 7096a3124a3SLatchesar Ionkov perm = unixmode2p9mode(v9ses, mode | S_IFDIR); 710bd238fb4SLatchesar Ionkov fid = v9fs_create(v9ses, dir, dentry, NULL, perm, P9_OREAD); 711bd238fb4SLatchesar Ionkov if (IS_ERR(fid)) { 712bd238fb4SLatchesar Ionkov err = PTR_ERR(fid); 713bd238fb4SLatchesar Ionkov fid = NULL; 714d28c61f0SAneesh Kumar K.V } else { 715b271ec47SAneesh Kumar K.V inc_nlink(dir); 716d28c61f0SAneesh Kumar K.V v9fs_invalidate_inode_attr(dir); 717d28c61f0SAneesh Kumar K.V } 7186a3124a3SLatchesar Ionkov 719bd238fb4SLatchesar Ionkov if (fid) 720bd238fb4SLatchesar Ionkov p9_client_clunk(fid); 7216a3124a3SLatchesar Ionkov 7226a3124a3SLatchesar Ionkov return err; 7232bad8471SEric Van Hensbergen } 7242bad8471SEric Van Hensbergen 7252bad8471SEric Van Hensbergen /** 7262bad8471SEric Van Hensbergen * v9fs_vfs_lookup - VFS lookup hook to "walk" to a new inode 7272bad8471SEric Van Hensbergen * @dir: inode that is being walked from 7282bad8471SEric Van Hensbergen * @dentry: dentry that is being walked to? 7292bad8471SEric Van Hensbergen * @nameidata: path data 7302bad8471SEric Van Hensbergen * 7312bad8471SEric Van Hensbergen */ 7322bad8471SEric Van Hensbergen 73353c06f4eSAneesh Kumar K.V struct dentry *v9fs_vfs_lookup(struct inode *dir, struct dentry *dentry, 7342bad8471SEric Van Hensbergen struct nameidata *nameidata) 7352bad8471SEric Van Hensbergen { 7362bad8471SEric Van Hensbergen struct super_block *sb; 7372bad8471SEric Van Hensbergen struct v9fs_session_info *v9ses; 738bd238fb4SLatchesar Ionkov struct p9_fid *dfid, *fid; 7392bad8471SEric Van Hensbergen struct inode *inode; 740bd238fb4SLatchesar Ionkov char *name; 7412bad8471SEric Van Hensbergen int result = 0; 7422bad8471SEric Van Hensbergen 743bd238fb4SLatchesar Ionkov P9_DPRINTK(P9_DEBUG_VFS, "dir: %p dentry: (%s) %p nameidata: %p\n", 744731805b4SLatchesar Ionkov dir, dentry->d_name.name, dentry, nameidata); 7452bad8471SEric Van Hensbergen 74611e9b49bSSripathi Kodi if (dentry->d_name.len > NAME_MAX) 74711e9b49bSSripathi Kodi return ERR_PTR(-ENAMETOOLONG); 74811e9b49bSSripathi Kodi 7492bad8471SEric Van Hensbergen sb = dir->i_sb; 7502bad8471SEric Van Hensbergen v9ses = v9fs_inode2v9ses(dir); 751a534c8d1SAneesh Kumar K.V /* We can walk d_parent because we hold the dir->i_mutex */ 752bd238fb4SLatchesar Ionkov dfid = v9fs_fid_lookup(dentry->d_parent); 753bd238fb4SLatchesar Ionkov if (IS_ERR(dfid)) 754e231c2eeSDavid Howells return ERR_CAST(dfid); 7552bad8471SEric Van Hensbergen 756bd238fb4SLatchesar Ionkov name = (char *) dentry->d_name.name; 757bd238fb4SLatchesar Ionkov fid = p9_client_walk(dfid, 1, &name, 1); 758bd238fb4SLatchesar Ionkov if (IS_ERR(fid)) { 759bd238fb4SLatchesar Ionkov result = PTR_ERR(fid); 7602bad8471SEric Van Hensbergen if (result == -ENOENT) { 76185e0df24SAneesh Kumar K.V inode = NULL; 76285e0df24SAneesh Kumar K.V goto inst_out; 7632bad8471SEric Van Hensbergen } 7642bad8471SEric Van Hensbergen 765bd238fb4SLatchesar Ionkov return ERR_PTR(result); 7662bad8471SEric Van Hensbergen } 7672bad8471SEric Van Hensbergen 768a78ce05dSAneesh Kumar K.V inode = v9fs_get_inode_from_fid(v9ses, fid, dir->i_sb); 769bd238fb4SLatchesar Ionkov if (IS_ERR(inode)) { 770bd238fb4SLatchesar Ionkov result = PTR_ERR(inode); 771bd238fb4SLatchesar Ionkov inode = NULL; 772bd238fb4SLatchesar Ionkov goto error; 7732bad8471SEric Van Hensbergen } 7742bad8471SEric Van Hensbergen 775bd238fb4SLatchesar Ionkov result = v9fs_fid_add(dentry, fid); 7766a3124a3SLatchesar Ionkov if (result < 0) 7779856af8bSAneesh Kumar K.V goto error_iput; 7786a3124a3SLatchesar Ionkov 77985e0df24SAneesh Kumar K.V inst_out: 7802bad8471SEric Van Hensbergen d_add(dentry, inode); 7812bad8471SEric Van Hensbergen return NULL; 7822bad8471SEric Van Hensbergen 7839856af8bSAneesh Kumar K.V error_iput: 7849856af8bSAneesh Kumar K.V iput(inode); 785bd238fb4SLatchesar Ionkov error: 786bd238fb4SLatchesar Ionkov p9_client_clunk(fid); 787da977b2cSEric Van Hensbergen 7882bad8471SEric Van Hensbergen return ERR_PTR(result); 7892bad8471SEric Van Hensbergen } 7902bad8471SEric Van Hensbergen 7912bad8471SEric Van Hensbergen /** 7922bad8471SEric Van Hensbergen * v9fs_vfs_unlink - VFS unlink hook to delete an inode 7932bad8471SEric Van Hensbergen * @i: inode that is being unlinked 79473c592b9SEric Van Hensbergen * @d: dentry that is being unlinked 7952bad8471SEric Van Hensbergen * 7962bad8471SEric Van Hensbergen */ 7972bad8471SEric Van Hensbergen 79853c06f4eSAneesh Kumar K.V int v9fs_vfs_unlink(struct inode *i, struct dentry *d) 7992bad8471SEric Van Hensbergen { 8002bad8471SEric Van Hensbergen return v9fs_remove(i, d, 0); 8012bad8471SEric Van Hensbergen } 8022bad8471SEric Van Hensbergen 8032bad8471SEric Van Hensbergen /** 8042bad8471SEric Van Hensbergen * v9fs_vfs_rmdir - VFS unlink hook to delete a directory 8052bad8471SEric Van Hensbergen * @i: inode that is being unlinked 80673c592b9SEric Van Hensbergen * @d: dentry that is being unlinked 8072bad8471SEric Van Hensbergen * 8082bad8471SEric Van Hensbergen */ 8092bad8471SEric Van Hensbergen 81053c06f4eSAneesh Kumar K.V int v9fs_vfs_rmdir(struct inode *i, struct dentry *d) 8112bad8471SEric Van Hensbergen { 8122bad8471SEric Van Hensbergen return v9fs_remove(i, d, 1); 8132bad8471SEric Van Hensbergen } 8142bad8471SEric Van Hensbergen 8152bad8471SEric Van Hensbergen /** 8162bad8471SEric Van Hensbergen * v9fs_vfs_rename - VFS hook to rename an inode 8172bad8471SEric Van Hensbergen * @old_dir: old dir inode 8182bad8471SEric Van Hensbergen * @old_dentry: old dentry 8192bad8471SEric Van Hensbergen * @new_dir: new dir inode 8202bad8471SEric Van Hensbergen * @new_dentry: new dentry 8212bad8471SEric Van Hensbergen * 8222bad8471SEric Van Hensbergen */ 8232bad8471SEric Van Hensbergen 82453c06f4eSAneesh Kumar K.V int 8252bad8471SEric Van Hensbergen v9fs_vfs_rename(struct inode *old_dir, struct dentry *old_dentry, 8262bad8471SEric Van Hensbergen struct inode *new_dir, struct dentry *new_dentry) 8272bad8471SEric Van Hensbergen { 828d28c61f0SAneesh Kumar K.V int retval; 829bd238fb4SLatchesar Ionkov struct inode *old_inode; 830b271ec47SAneesh Kumar K.V struct inode *new_inode; 831bd238fb4SLatchesar Ionkov struct v9fs_session_info *v9ses; 832bd238fb4SLatchesar Ionkov struct p9_fid *oldfid; 833bd238fb4SLatchesar Ionkov struct p9_fid *olddirfid; 834bd238fb4SLatchesar Ionkov struct p9_fid *newdirfid; 835bd238fb4SLatchesar Ionkov struct p9_wstat wstat; 8362bad8471SEric Van Hensbergen 837bd238fb4SLatchesar Ionkov P9_DPRINTK(P9_DEBUG_VFS, "\n"); 838bd238fb4SLatchesar Ionkov retval = 0; 839bd238fb4SLatchesar Ionkov old_inode = old_dentry->d_inode; 840b271ec47SAneesh Kumar K.V new_inode = new_dentry->d_inode; 841bd238fb4SLatchesar Ionkov v9ses = v9fs_inode2v9ses(old_inode); 842bd238fb4SLatchesar Ionkov oldfid = v9fs_fid_lookup(old_dentry); 843da977b2cSEric Van Hensbergen if (IS_ERR(oldfid)) 844da977b2cSEric Van Hensbergen return PTR_ERR(oldfid); 845da977b2cSEric Van Hensbergen 846da977b2cSEric Van Hensbergen olddirfid = v9fs_fid_clone(old_dentry->d_parent); 847da977b2cSEric Van Hensbergen if (IS_ERR(olddirfid)) { 848da977b2cSEric Van Hensbergen retval = PTR_ERR(olddirfid); 849bd238fb4SLatchesar Ionkov goto done; 850da977b2cSEric Van Hensbergen } 851da977b2cSEric Van Hensbergen 852da977b2cSEric Van Hensbergen newdirfid = v9fs_fid_clone(new_dentry->d_parent); 853da977b2cSEric Van Hensbergen if (IS_ERR(newdirfid)) { 854da977b2cSEric Van Hensbergen retval = PTR_ERR(newdirfid); 855bd238fb4SLatchesar Ionkov goto clunk_olddir; 8562bad8471SEric Van Hensbergen } 8572bad8471SEric Van Hensbergen 858a534c8d1SAneesh Kumar K.V down_write(&v9ses->rename_sem); 8594681dbdaSSripathi Kodi if (v9fs_proto_dotl(v9ses)) { 8604681dbdaSSripathi Kodi retval = p9_client_rename(oldfid, newdirfid, 8614681dbdaSSripathi Kodi (char *) new_dentry->d_name.name); 8624681dbdaSSripathi Kodi if (retval != -ENOSYS) 8634681dbdaSSripathi Kodi goto clunk_newdir; 8644681dbdaSSripathi Kodi } 865a534c8d1SAneesh Kumar K.V if (old_dentry->d_parent != new_dentry->d_parent) { 866a534c8d1SAneesh Kumar K.V /* 867a534c8d1SAneesh Kumar K.V * 9P .u can only handle file rename in the same directory 868a534c8d1SAneesh Kumar K.V */ 8694681dbdaSSripathi Kodi 870bd238fb4SLatchesar Ionkov P9_DPRINTK(P9_DEBUG_ERROR, 871bd238fb4SLatchesar Ionkov "old dir and new dir are different\n"); 872621997cdSEric Van Hensbergen retval = -EXDEV; 873bd238fb4SLatchesar Ionkov goto clunk_newdir; 8742bad8471SEric Van Hensbergen } 875531b1094SLatchesar Ionkov v9fs_blank_wstat(&wstat); 876ba17674fSLatchesar Ionkov wstat.muid = v9ses->uname; 877531b1094SLatchesar Ionkov wstat.name = (char *) new_dentry->d_name.name; 878bd238fb4SLatchesar Ionkov retval = p9_client_wstat(oldfid, &wstat); 8792bad8471SEric Van Hensbergen 880bd238fb4SLatchesar Ionkov clunk_newdir: 881b271ec47SAneesh Kumar K.V if (!retval) { 882b271ec47SAneesh Kumar K.V if (new_inode) { 883b271ec47SAneesh Kumar K.V if (S_ISDIR(new_inode->i_mode)) 884b271ec47SAneesh Kumar K.V clear_nlink(new_inode); 885b271ec47SAneesh Kumar K.V else 886b271ec47SAneesh Kumar K.V drop_nlink(new_inode); 887b271ec47SAneesh Kumar K.V } 888b271ec47SAneesh Kumar K.V if (S_ISDIR(old_inode->i_mode)) { 889b271ec47SAneesh Kumar K.V if (!new_inode) 890b271ec47SAneesh Kumar K.V inc_nlink(new_dir); 891b271ec47SAneesh Kumar K.V drop_nlink(old_dir); 892b271ec47SAneesh Kumar K.V } 8933bc86de3SAneesh Kumar K.V v9fs_invalidate_inode_attr(old_inode); 894d28c61f0SAneesh Kumar K.V v9fs_invalidate_inode_attr(old_dir); 895d28c61f0SAneesh Kumar K.V v9fs_invalidate_inode_attr(new_dir); 8963bc86de3SAneesh Kumar K.V 897a534c8d1SAneesh Kumar K.V /* successful rename */ 898a534c8d1SAneesh Kumar K.V d_move(old_dentry, new_dentry); 899b271ec47SAneesh Kumar K.V } 900a534c8d1SAneesh Kumar K.V up_write(&v9ses->rename_sem); 90122150c4fSLatchesar Ionkov p9_client_clunk(newdirfid); 9022bad8471SEric Van Hensbergen 903bd238fb4SLatchesar Ionkov clunk_olddir: 90422150c4fSLatchesar Ionkov p9_client_clunk(olddirfid); 9052bad8471SEric Van Hensbergen 906bd238fb4SLatchesar Ionkov done: 9072bad8471SEric Van Hensbergen return retval; 9082bad8471SEric Van Hensbergen } 9092bad8471SEric Van Hensbergen 9102bad8471SEric Van Hensbergen /** 911943ffb58SAdrian Bunk * v9fs_vfs_getattr - retrieve file metadata 912ee443996SEric Van Hensbergen * @mnt: mount information 913ee443996SEric Van Hensbergen * @dentry: file to get attributes on 914ee443996SEric Van Hensbergen * @stat: metadata structure to populate 9152bad8471SEric Van Hensbergen * 9162bad8471SEric Van Hensbergen */ 9172bad8471SEric Van Hensbergen 9182bad8471SEric Van Hensbergen static int 9192bad8471SEric Van Hensbergen v9fs_vfs_getattr(struct vfsmount *mnt, struct dentry *dentry, 9202bad8471SEric Van Hensbergen struct kstat *stat) 9212bad8471SEric Van Hensbergen { 922bd238fb4SLatchesar Ionkov int err; 923bd238fb4SLatchesar Ionkov struct v9fs_session_info *v9ses; 924bd238fb4SLatchesar Ionkov struct p9_fid *fid; 92551a87c55SEric Van Hensbergen struct p9_wstat *st; 9262bad8471SEric Van Hensbergen 927bd238fb4SLatchesar Ionkov P9_DPRINTK(P9_DEBUG_VFS, "dentry: %p\n", dentry); 928bd238fb4SLatchesar Ionkov err = -EPERM; 929bd238fb4SLatchesar Ionkov v9ses = v9fs_inode2v9ses(dentry->d_inode); 930a1211908SAneesh Kumar K.V if (v9ses->cache == CACHE_LOOSE || v9ses->cache == CACHE_FSCACHE) { 931a1211908SAneesh Kumar K.V generic_fillattr(dentry->d_inode, stat); 932a1211908SAneesh Kumar K.V return 0; 933a1211908SAneesh Kumar K.V } 934bd238fb4SLatchesar Ionkov fid = v9fs_fid_lookup(dentry); 935da977b2cSEric Van Hensbergen if (IS_ERR(fid)) 936da977b2cSEric Van Hensbergen return PTR_ERR(fid); 9372bad8471SEric Van Hensbergen 938bd238fb4SLatchesar Ionkov st = p9_client_stat(fid); 939bd238fb4SLatchesar Ionkov if (IS_ERR(st)) 940bd238fb4SLatchesar Ionkov return PTR_ERR(st); 9412bad8471SEric Van Hensbergen 942bd238fb4SLatchesar Ionkov v9fs_stat2inode(st, dentry->d_inode, dentry->d_inode->i_sb); 9432bad8471SEric Van Hensbergen generic_fillattr(dentry->d_inode, stat); 9442bad8471SEric Van Hensbergen 94562b2be59SLatchesar Ionkov p9stat_free(st); 946bd238fb4SLatchesar Ionkov kfree(st); 947bd238fb4SLatchesar Ionkov return 0; 9482bad8471SEric Van Hensbergen } 9492bad8471SEric Van Hensbergen 9502bad8471SEric Van Hensbergen /** 9512bad8471SEric Van Hensbergen * v9fs_vfs_setattr - set file metadata 9522bad8471SEric Van Hensbergen * @dentry: file whose metadata to set 9532bad8471SEric Van Hensbergen * @iattr: metadata assignment structure 9542bad8471SEric Van Hensbergen * 9552bad8471SEric Van Hensbergen */ 9562bad8471SEric Van Hensbergen 9572bad8471SEric Van Hensbergen static int v9fs_vfs_setattr(struct dentry *dentry, struct iattr *iattr) 9582bad8471SEric Van Hensbergen { 959bd238fb4SLatchesar Ionkov int retval; 960bd238fb4SLatchesar Ionkov struct v9fs_session_info *v9ses; 961bd238fb4SLatchesar Ionkov struct p9_fid *fid; 962bd238fb4SLatchesar Ionkov struct p9_wstat wstat; 9632bad8471SEric Van Hensbergen 964bd238fb4SLatchesar Ionkov P9_DPRINTK(P9_DEBUG_VFS, "\n"); 965bd238fb4SLatchesar Ionkov retval = -EPERM; 966bd238fb4SLatchesar Ionkov v9ses = v9fs_inode2v9ses(dentry->d_inode); 967bd238fb4SLatchesar Ionkov fid = v9fs_fid_lookup(dentry); 968da977b2cSEric Van Hensbergen if(IS_ERR(fid)) 969da977b2cSEric Van Hensbergen return PTR_ERR(fid); 9702bad8471SEric Van Hensbergen 971531b1094SLatchesar Ionkov v9fs_blank_wstat(&wstat); 9722bad8471SEric Van Hensbergen if (iattr->ia_valid & ATTR_MODE) 973531b1094SLatchesar Ionkov wstat.mode = unixmode2p9mode(v9ses, iattr->ia_mode); 9742bad8471SEric Van Hensbergen 9752bad8471SEric Van Hensbergen if (iattr->ia_valid & ATTR_MTIME) 976531b1094SLatchesar Ionkov wstat.mtime = iattr->ia_mtime.tv_sec; 9772bad8471SEric Van Hensbergen 9782bad8471SEric Van Hensbergen if (iattr->ia_valid & ATTR_ATIME) 979531b1094SLatchesar Ionkov wstat.atime = iattr->ia_atime.tv_sec; 9802bad8471SEric Van Hensbergen 9812bad8471SEric Van Hensbergen if (iattr->ia_valid & ATTR_SIZE) 982531b1094SLatchesar Ionkov wstat.length = iattr->ia_size; 9832bad8471SEric Van Hensbergen 984dd6102fbSSripathi Kodi if (v9fs_proto_dotu(v9ses)) { 985531b1094SLatchesar Ionkov if (iattr->ia_valid & ATTR_UID) 986531b1094SLatchesar Ionkov wstat.n_uid = iattr->ia_uid; 9872bad8471SEric Van Hensbergen 988531b1094SLatchesar Ionkov if (iattr->ia_valid & ATTR_GID) 989531b1094SLatchesar Ionkov wstat.n_gid = iattr->ia_gid; 9902bad8471SEric Van Hensbergen } 9912bad8471SEric Van Hensbergen 992bd238fb4SLatchesar Ionkov retval = p9_client_wstat(fid, &wstat); 9931025774cSChristoph Hellwig if (retval < 0) 994bd238fb4SLatchesar Ionkov return retval; 9951025774cSChristoph Hellwig 9963bc86de3SAneesh Kumar K.V v9fs_invalidate_inode_attr(dentry->d_inode); 9971025774cSChristoph Hellwig if ((iattr->ia_valid & ATTR_SIZE) && 9981025774cSChristoph Hellwig iattr->ia_size != i_size_read(dentry->d_inode)) { 9991025774cSChristoph Hellwig retval = vmtruncate(dentry->d_inode, iattr->ia_size); 10001025774cSChristoph Hellwig if (retval) 10011025774cSChristoph Hellwig return retval; 10021025774cSChristoph Hellwig } 10031025774cSChristoph Hellwig 10041025774cSChristoph Hellwig setattr_copy(dentry->d_inode, iattr); 10051025774cSChristoph Hellwig mark_inode_dirty(dentry->d_inode); 10061025774cSChristoph Hellwig return 0; 10072bad8471SEric Van Hensbergen } 10082bad8471SEric Van Hensbergen 10092bad8471SEric Van Hensbergen /** 1010531b1094SLatchesar Ionkov * v9fs_stat2inode - populate an inode structure with mistat info 1011531b1094SLatchesar Ionkov * @stat: Plan 9 metadata (mistat) structure 10122bad8471SEric Van Hensbergen * @inode: inode to populate 10132bad8471SEric Van Hensbergen * @sb: superblock of filesystem 10142bad8471SEric Van Hensbergen * 10152bad8471SEric Van Hensbergen */ 10162bad8471SEric Van Hensbergen 10172bad8471SEric Van Hensbergen void 101851a87c55SEric Van Hensbergen v9fs_stat2inode(struct p9_wstat *stat, struct inode *inode, 10192bad8471SEric Van Hensbergen struct super_block *sb) 10202bad8471SEric Van Hensbergen { 1021531b1094SLatchesar Ionkov char ext[32]; 10225717144aSAneesh Kumar K.V char tag_name[14]; 10235717144aSAneesh Kumar K.V unsigned int i_nlink; 10242bad8471SEric Van Hensbergen struct v9fs_session_info *v9ses = sb->s_fs_info; 1025b3cbea03SAneesh Kumar K.V struct v9fs_inode *v9inode = V9FS_I(inode); 10262bad8471SEric Van Hensbergen 10272bad8471SEric Van Hensbergen inode->i_nlink = 1; 10282bad8471SEric Van Hensbergen 1029531b1094SLatchesar Ionkov inode->i_atime.tv_sec = stat->atime; 1030531b1094SLatchesar Ionkov inode->i_mtime.tv_sec = stat->mtime; 1031531b1094SLatchesar Ionkov inode->i_ctime.tv_sec = stat->mtime; 10322bad8471SEric Van Hensbergen 1033bd32b82dSLatchesar Ionkov inode->i_uid = v9ses->dfltuid; 1034bd32b82dSLatchesar Ionkov inode->i_gid = v9ses->dfltgid; 10352bad8471SEric Van Hensbergen 1036dd6102fbSSripathi Kodi if (v9fs_proto_dotu(v9ses)) { 1037531b1094SLatchesar Ionkov inode->i_uid = stat->n_uid; 1038531b1094SLatchesar Ionkov inode->i_gid = stat->n_gid; 1039531b1094SLatchesar Ionkov } 10405717144aSAneesh Kumar K.V if ((S_ISREG(inode->i_mode)) || (S_ISDIR(inode->i_mode))) { 10415717144aSAneesh Kumar K.V if (v9fs_proto_dotu(v9ses) && (stat->extension[0] != '\0')) { 10425717144aSAneesh Kumar K.V /* 10435717144aSAneesh Kumar K.V * Hadlink support got added later to 10445717144aSAneesh Kumar K.V * to the .u extension. So there can be 10455717144aSAneesh Kumar K.V * server out there that doesn't support 10465717144aSAneesh Kumar K.V * this even with .u extension. So check 10475717144aSAneesh Kumar K.V * for non NULL stat->extension 10485717144aSAneesh Kumar K.V */ 10495717144aSAneesh Kumar K.V strncpy(ext, stat->extension, sizeof(ext)); 10505717144aSAneesh Kumar K.V /* HARDLINKCOUNT %u */ 10515717144aSAneesh Kumar K.V sscanf(ext, "%13s %u", tag_name, &i_nlink); 10525717144aSAneesh Kumar K.V if (!strncmp(tag_name, "HARDLINKCOUNT", 13)) 10535717144aSAneesh Kumar K.V inode->i_nlink = i_nlink; 10545717144aSAneesh Kumar K.V } 10555717144aSAneesh Kumar K.V } 1056531b1094SLatchesar Ionkov inode->i_mode = p9mode2unixmode(v9ses, stat->mode); 10572bad8471SEric Van Hensbergen if ((S_ISBLK(inode->i_mode)) || (S_ISCHR(inode->i_mode))) { 10582bad8471SEric Van Hensbergen char type = 0; 10592bad8471SEric Van Hensbergen int major = -1; 10602bad8471SEric Van Hensbergen int minor = -1; 1061531b1094SLatchesar Ionkov 106251a87c55SEric Van Hensbergen strncpy(ext, stat->extension, sizeof(ext)); 1063531b1094SLatchesar Ionkov sscanf(ext, "%c %u %u", &type, &major, &minor); 10642bad8471SEric Van Hensbergen switch (type) { 10652bad8471SEric Van Hensbergen case 'c': 10662bad8471SEric Van Hensbergen inode->i_mode &= ~S_IFBLK; 10672bad8471SEric Van Hensbergen inode->i_mode |= S_IFCHR; 10682bad8471SEric Van Hensbergen break; 10692bad8471SEric Van Hensbergen case 'b': 10702bad8471SEric Van Hensbergen break; 10712bad8471SEric Van Hensbergen default: 1072bd238fb4SLatchesar Ionkov P9_DPRINTK(P9_DEBUG_ERROR, 107351a87c55SEric Van Hensbergen "Unknown special type %c %s\n", type, 107451a87c55SEric Van Hensbergen stat->extension); 10752bad8471SEric Van Hensbergen }; 10762bad8471SEric Van Hensbergen inode->i_rdev = MKDEV(major, minor); 107757c7b4e6SMagnus Deininger init_special_inode(inode, inode->i_mode, inode->i_rdev); 10782bad8471SEric Van Hensbergen } else 10792bad8471SEric Van Hensbergen inode->i_rdev = 0; 10802bad8471SEric Van Hensbergen 10817549ae3eSAbhishek Kulkarni i_size_write(inode, stat->length); 10822bad8471SEric Van Hensbergen 1083bd238fb4SLatchesar Ionkov /* not real number of blocks, but 512 byte ones ... */ 10847549ae3eSAbhishek Kulkarni inode->i_blocks = (i_size_read(inode) + 512 - 1) >> 9; 1085b3cbea03SAneesh Kumar K.V v9inode->cache_validity &= ~V9FS_INO_INVALID_ATTR; 10862bad8471SEric Van Hensbergen } 10872bad8471SEric Van Hensbergen 10882bad8471SEric Van Hensbergen /** 10892bad8471SEric Van Hensbergen * v9fs_qid2ino - convert qid into inode number 10902bad8471SEric Van Hensbergen * @qid: qid to hash 10912bad8471SEric Van Hensbergen * 10922bad8471SEric Van Hensbergen * BUG: potential for inode number collisions? 10932bad8471SEric Van Hensbergen */ 10942bad8471SEric Van Hensbergen 1095bd238fb4SLatchesar Ionkov ino_t v9fs_qid2ino(struct p9_qid *qid) 10962bad8471SEric Van Hensbergen { 10972bad8471SEric Van Hensbergen u64 path = qid->path + 2; 10982bad8471SEric Van Hensbergen ino_t i = 0; 10992bad8471SEric Van Hensbergen 11002bad8471SEric Van Hensbergen if (sizeof(ino_t) == sizeof(path)) 11012bad8471SEric Van Hensbergen memcpy(&i, &path, sizeof(ino_t)); 11022bad8471SEric Van Hensbergen else 11032bad8471SEric Van Hensbergen i = (ino_t) (path ^ (path >> 32)); 11042bad8471SEric Van Hensbergen 11052bad8471SEric Van Hensbergen return i; 11062bad8471SEric Van Hensbergen } 11072bad8471SEric Van Hensbergen 11082bad8471SEric Van Hensbergen /** 11092bad8471SEric Van Hensbergen * v9fs_readlink - read a symlink's location (internal version) 11102bad8471SEric Van Hensbergen * @dentry: dentry for symlink 111173c592b9SEric Van Hensbergen * @buffer: buffer to load symlink location into 11122bad8471SEric Van Hensbergen * @buflen: length of buffer 11132bad8471SEric Van Hensbergen * 11142bad8471SEric Van Hensbergen */ 11152bad8471SEric Van Hensbergen 11162bad8471SEric Van Hensbergen static int v9fs_readlink(struct dentry *dentry, char *buffer, int buflen) 11172bad8471SEric Van Hensbergen { 1118bd238fb4SLatchesar Ionkov int retval; 11192bad8471SEric Van Hensbergen 1120bd238fb4SLatchesar Ionkov struct v9fs_session_info *v9ses; 1121bd238fb4SLatchesar Ionkov struct p9_fid *fid; 112251a87c55SEric Van Hensbergen struct p9_wstat *st; 11232bad8471SEric Van Hensbergen 1124bd238fb4SLatchesar Ionkov P9_DPRINTK(P9_DEBUG_VFS, " %s\n", dentry->d_name.name); 1125bd238fb4SLatchesar Ionkov retval = -EPERM; 1126bd238fb4SLatchesar Ionkov v9ses = v9fs_inode2v9ses(dentry->d_inode); 1127bd238fb4SLatchesar Ionkov fid = v9fs_fid_lookup(dentry); 1128da977b2cSEric Van Hensbergen if (IS_ERR(fid)) 1129da977b2cSEric Van Hensbergen return PTR_ERR(fid); 11302bad8471SEric Van Hensbergen 1131329176ccSM. Mohan Kumar if (!v9fs_proto_dotu(v9ses)) 1132bd238fb4SLatchesar Ionkov return -EBADF; 11332bad8471SEric Van Hensbergen 1134bd238fb4SLatchesar Ionkov st = p9_client_stat(fid); 1135bd238fb4SLatchesar Ionkov if (IS_ERR(st)) 1136bd238fb4SLatchesar Ionkov return PTR_ERR(st); 11372bad8471SEric Van Hensbergen 1138bd238fb4SLatchesar Ionkov if (!(st->mode & P9_DMSYMLINK)) { 11392bad8471SEric Van Hensbergen retval = -EINVAL; 1140bd238fb4SLatchesar Ionkov goto done; 11412bad8471SEric Van Hensbergen } 11422bad8471SEric Van Hensbergen 11432bad8471SEric Van Hensbergen /* copy extension buffer into buffer */ 114451a87c55SEric Van Hensbergen strncpy(buffer, st->extension, buflen); 11452bad8471SEric Van Hensbergen 1146bd238fb4SLatchesar Ionkov P9_DPRINTK(P9_DEBUG_VFS, 114751a87c55SEric Van Hensbergen "%s -> %s (%s)\n", dentry->d_name.name, st->extension, buffer); 1148bd238fb4SLatchesar Ionkov 11492511cd0bSMartin Stava retval = strnlen(buffer, buflen); 1150bd238fb4SLatchesar Ionkov done: 115162b2be59SLatchesar Ionkov p9stat_free(st); 1152bd238fb4SLatchesar Ionkov kfree(st); 11532bad8471SEric Van Hensbergen return retval; 11542bad8471SEric Van Hensbergen } 11552bad8471SEric Van Hensbergen 11562bad8471SEric Van Hensbergen /** 11572bad8471SEric Van Hensbergen * v9fs_vfs_follow_link - follow a symlink path 11582bad8471SEric Van Hensbergen * @dentry: dentry for symlink 11592bad8471SEric Van Hensbergen * @nd: nameidata 11602bad8471SEric Van Hensbergen * 11612bad8471SEric Van Hensbergen */ 11622bad8471SEric Van Hensbergen 11632bad8471SEric Van Hensbergen static void *v9fs_vfs_follow_link(struct dentry *dentry, struct nameidata *nd) 11642bad8471SEric Van Hensbergen { 11652bad8471SEric Van Hensbergen int len = 0; 11662bad8471SEric Van Hensbergen char *link = __getname(); 11672bad8471SEric Van Hensbergen 1168bd238fb4SLatchesar Ionkov P9_DPRINTK(P9_DEBUG_VFS, "%s n", dentry->d_name.name); 11692bad8471SEric Van Hensbergen 11702bad8471SEric Van Hensbergen if (!link) 11712bad8471SEric Van Hensbergen link = ERR_PTR(-ENOMEM); 11722bad8471SEric Van Hensbergen else { 117316cce6d2SLatchesar Ionkov len = v9fs_readlink(dentry, link, PATH_MAX); 11742bad8471SEric Van Hensbergen 11752bad8471SEric Van Hensbergen if (len < 0) { 1176ce44eeb6SDavi Arnaut __putname(link); 11772bad8471SEric Van Hensbergen link = ERR_PTR(len); 11782bad8471SEric Van Hensbergen } else 11792511cd0bSMartin Stava link[min(len, PATH_MAX-1)] = 0; 11802bad8471SEric Van Hensbergen } 11812bad8471SEric Van Hensbergen nd_set_link(nd, link); 11822bad8471SEric Van Hensbergen 11832bad8471SEric Van Hensbergen return NULL; 11842bad8471SEric Van Hensbergen } 11852bad8471SEric Van Hensbergen 11862bad8471SEric Van Hensbergen /** 11872bad8471SEric Van Hensbergen * v9fs_vfs_put_link - release a symlink path 11882bad8471SEric Van Hensbergen * @dentry: dentry for symlink 11892bad8471SEric Van Hensbergen * @nd: nameidata 1190ee443996SEric Van Hensbergen * @p: unused 11912bad8471SEric Van Hensbergen * 11922bad8471SEric Van Hensbergen */ 11932bad8471SEric Van Hensbergen 119453c06f4eSAneesh Kumar K.V void 1195ee443996SEric Van Hensbergen v9fs_vfs_put_link(struct dentry *dentry, struct nameidata *nd, void *p) 11962bad8471SEric Van Hensbergen { 11972bad8471SEric Van Hensbergen char *s = nd_get_link(nd); 11982bad8471SEric Van Hensbergen 11996ff23207SDuane Griffin P9_DPRINTK(P9_DEBUG_VFS, " %s %s\n", dentry->d_name.name, 12006ff23207SDuane Griffin IS_ERR(s) ? "<error>" : s); 12012bad8471SEric Van Hensbergen if (!IS_ERR(s)) 1202ce44eeb6SDavi Arnaut __putname(s); 12032bad8471SEric Van Hensbergen } 12042bad8471SEric Van Hensbergen 1205ee443996SEric Van Hensbergen /** 1206ee443996SEric Van Hensbergen * v9fs_vfs_mkspecial - create a special file 1207ee443996SEric Van Hensbergen * @dir: inode to create special file in 1208ee443996SEric Van Hensbergen * @dentry: dentry to create 1209ee443996SEric Van Hensbergen * @mode: mode to create special file 1210ee443996SEric Van Hensbergen * @extension: 9p2000.u format extension string representing special file 1211ee443996SEric Van Hensbergen * 1212ee443996SEric Van Hensbergen */ 1213ee443996SEric Van Hensbergen 1214531b1094SLatchesar Ionkov static int v9fs_vfs_mkspecial(struct inode *dir, struct dentry *dentry, 1215531b1094SLatchesar Ionkov int mode, const char *extension) 1216531b1094SLatchesar Ionkov { 1217bd238fb4SLatchesar Ionkov u32 perm; 1218bd238fb4SLatchesar Ionkov struct p9_fid *fid; 1219d28c61f0SAneesh Kumar K.V struct v9fs_session_info *v9ses; 1220531b1094SLatchesar Ionkov 12216a3124a3SLatchesar Ionkov v9ses = v9fs_inode2v9ses(dir); 1222dd6102fbSSripathi Kodi if (!v9fs_proto_dotu(v9ses)) { 1223bd238fb4SLatchesar Ionkov P9_DPRINTK(P9_DEBUG_ERROR, "not extended\n"); 12246a3124a3SLatchesar Ionkov return -EPERM; 1225531b1094SLatchesar Ionkov } 1226531b1094SLatchesar Ionkov 1227da977b2cSEric Van Hensbergen perm = unixmode2p9mode(v9ses, mode); 1228bd238fb4SLatchesar Ionkov fid = v9fs_create(v9ses, dir, dentry, (char *) extension, perm, 1229bd238fb4SLatchesar Ionkov P9_OREAD); 1230bd238fb4SLatchesar Ionkov if (IS_ERR(fid)) 1231bd238fb4SLatchesar Ionkov return PTR_ERR(fid); 1232da977b2cSEric Van Hensbergen 1233d28c61f0SAneesh Kumar K.V v9fs_invalidate_inode_attr(dir); 1234bd238fb4SLatchesar Ionkov p9_client_clunk(fid); 12356a3124a3SLatchesar Ionkov return 0; 1236531b1094SLatchesar Ionkov } 1237531b1094SLatchesar Ionkov 1238531b1094SLatchesar Ionkov /** 1239531b1094SLatchesar Ionkov * v9fs_vfs_symlink - helper function to create symlinks 1240531b1094SLatchesar Ionkov * @dir: directory inode containing symlink 1241531b1094SLatchesar Ionkov * @dentry: dentry for symlink 1242531b1094SLatchesar Ionkov * @symname: symlink data 1243531b1094SLatchesar Ionkov * 1244ee443996SEric Van Hensbergen * See Also: 9P2000.u RFC for more information 1245531b1094SLatchesar Ionkov * 1246531b1094SLatchesar Ionkov */ 1247531b1094SLatchesar Ionkov 1248531b1094SLatchesar Ionkov static int 1249531b1094SLatchesar Ionkov v9fs_vfs_symlink(struct inode *dir, struct dentry *dentry, const char *symname) 1250531b1094SLatchesar Ionkov { 1251bd238fb4SLatchesar Ionkov P9_DPRINTK(P9_DEBUG_VFS, " %lu,%s,%s\n", dir->i_ino, 1252bd238fb4SLatchesar Ionkov dentry->d_name.name, symname); 1253531b1094SLatchesar Ionkov 1254531b1094SLatchesar Ionkov return v9fs_vfs_mkspecial(dir, dentry, S_IFLNK, symname); 1255531b1094SLatchesar Ionkov } 1256531b1094SLatchesar Ionkov 12572bad8471SEric Van Hensbergen /** 12582bad8471SEric Van Hensbergen * v9fs_vfs_link - create a hardlink 12592bad8471SEric Van Hensbergen * @old_dentry: dentry for file to link to 12602bad8471SEric Van Hensbergen * @dir: inode destination for new link 126173c592b9SEric Van Hensbergen * @dentry: dentry for link 12622bad8471SEric Van Hensbergen * 12632bad8471SEric Van Hensbergen */ 12642bad8471SEric Van Hensbergen 12652bad8471SEric Van Hensbergen static int 12662bad8471SEric Van Hensbergen v9fs_vfs_link(struct dentry *old_dentry, struct inode *dir, 12672bad8471SEric Van Hensbergen struct dentry *dentry) 12682bad8471SEric Van Hensbergen { 1269531b1094SLatchesar Ionkov int retval; 1270531b1094SLatchesar Ionkov char *name; 1271d28c61f0SAneesh Kumar K.V struct p9_fid *oldfid; 12722bad8471SEric Van Hensbergen 1273bd238fb4SLatchesar Ionkov P9_DPRINTK(P9_DEBUG_VFS, 1274bd238fb4SLatchesar Ionkov " %lu,%s,%s\n", dir->i_ino, dentry->d_name.name, 12752bad8471SEric Van Hensbergen old_dentry->d_name.name); 12762bad8471SEric Van Hensbergen 1277da977b2cSEric Van Hensbergen oldfid = v9fs_fid_clone(old_dentry); 1278da977b2cSEric Van Hensbergen if (IS_ERR(oldfid)) 1279da977b2cSEric Van Hensbergen return PTR_ERR(oldfid); 12802bad8471SEric Van Hensbergen 1281531b1094SLatchesar Ionkov name = __getname(); 1282da977b2cSEric Van Hensbergen if (unlikely(!name)) { 1283da977b2cSEric Van Hensbergen retval = -ENOMEM; 1284da977b2cSEric Van Hensbergen goto clunk_fid; 1285da977b2cSEric Van Hensbergen } 12860710d36aSFlorin Malita 128716cce6d2SLatchesar Ionkov sprintf(name, "%d\n", oldfid->fid); 1288bd238fb4SLatchesar Ionkov retval = v9fs_vfs_mkspecial(dir, dentry, P9_DMLINK, name); 1289531b1094SLatchesar Ionkov __putname(name); 1290d28c61f0SAneesh Kumar K.V if (!retval) 1291d28c61f0SAneesh Kumar K.V v9fs_invalidate_inode_attr(dir); 1292da977b2cSEric Van Hensbergen clunk_fid: 1293bd238fb4SLatchesar Ionkov p9_client_clunk(oldfid); 12942bad8471SEric Van Hensbergen return retval; 12952bad8471SEric Van Hensbergen } 12962bad8471SEric Van Hensbergen 12972bad8471SEric Van Hensbergen /** 12982bad8471SEric Van Hensbergen * v9fs_vfs_mknod - create a special file 12992bad8471SEric Van Hensbergen * @dir: inode destination for new link 13002bad8471SEric Van Hensbergen * @dentry: dentry for file 13012bad8471SEric Van Hensbergen * @mode: mode for creation 1302ee443996SEric Van Hensbergen * @rdev: device associated with special file 13032bad8471SEric Van Hensbergen * 13042bad8471SEric Van Hensbergen */ 13052bad8471SEric Van Hensbergen 13062bad8471SEric Van Hensbergen static int 13072bad8471SEric Van Hensbergen v9fs_vfs_mknod(struct inode *dir, struct dentry *dentry, int mode, dev_t rdev) 13082bad8471SEric Van Hensbergen { 1309531b1094SLatchesar Ionkov int retval; 1310531b1094SLatchesar Ionkov char *name; 13112bad8471SEric Van Hensbergen 1312bd238fb4SLatchesar Ionkov P9_DPRINTK(P9_DEBUG_VFS, 1313bd238fb4SLatchesar Ionkov " %lu,%s mode: %x MAJOR: %u MINOR: %u\n", dir->i_ino, 13142bad8471SEric Van Hensbergen dentry->d_name.name, mode, MAJOR(rdev), MINOR(rdev)); 13152bad8471SEric Van Hensbergen 1316531b1094SLatchesar Ionkov if (!new_valid_dev(rdev)) 1317531b1094SLatchesar Ionkov return -EINVAL; 131873c592b9SEric Van Hensbergen 1319531b1094SLatchesar Ionkov name = __getname(); 1320c0291a05SEugene Teo if (!name) 1321c0291a05SEugene Teo return -ENOMEM; 13222bad8471SEric Van Hensbergen /* build extension */ 13232bad8471SEric Van Hensbergen if (S_ISBLK(mode)) 1324531b1094SLatchesar Ionkov sprintf(name, "b %u %u", MAJOR(rdev), MINOR(rdev)); 13252bad8471SEric Van Hensbergen else if (S_ISCHR(mode)) 1326531b1094SLatchesar Ionkov sprintf(name, "c %u %u", MAJOR(rdev), MINOR(rdev)); 132773c592b9SEric Van Hensbergen else if (S_ISFIFO(mode)) 1328531b1094SLatchesar Ionkov *name = 0; 132975cc5c9bSVenkateswararao Jujjuri else if (S_ISSOCK(mode)) 133075cc5c9bSVenkateswararao Jujjuri *name = 0; 13312bad8471SEric Van Hensbergen else { 1332531b1094SLatchesar Ionkov __putname(name); 1333531b1094SLatchesar Ionkov return -EINVAL; 13342bad8471SEric Van Hensbergen } 13352bad8471SEric Van Hensbergen 1336531b1094SLatchesar Ionkov retval = v9fs_vfs_mkspecial(dir, dentry, mode, name); 1337531b1094SLatchesar Ionkov __putname(name); 13382bad8471SEric Van Hensbergen 13392bad8471SEric Van Hensbergen return retval; 13402bad8471SEric Van Hensbergen } 13412bad8471SEric Van Hensbergen 1342b3cbea03SAneesh Kumar K.V int v9fs_refresh_inode(struct p9_fid *fid, struct inode *inode) 1343b3cbea03SAneesh Kumar K.V { 1344b3cbea03SAneesh Kumar K.V loff_t i_size; 1345b3cbea03SAneesh Kumar K.V struct p9_wstat *st; 1346b3cbea03SAneesh Kumar K.V struct v9fs_session_info *v9ses; 1347b3cbea03SAneesh Kumar K.V 1348b3cbea03SAneesh Kumar K.V v9ses = v9fs_inode2v9ses(inode); 1349b3cbea03SAneesh Kumar K.V st = p9_client_stat(fid); 1350b3cbea03SAneesh Kumar K.V if (IS_ERR(st)) 1351b3cbea03SAneesh Kumar K.V return PTR_ERR(st); 1352b3cbea03SAneesh Kumar K.V 1353b3cbea03SAneesh Kumar K.V spin_lock(&inode->i_lock); 1354b3cbea03SAneesh Kumar K.V /* 1355b3cbea03SAneesh Kumar K.V * We don't want to refresh inode->i_size, 1356b3cbea03SAneesh Kumar K.V * because we may have cached data 1357b3cbea03SAneesh Kumar K.V */ 1358b3cbea03SAneesh Kumar K.V i_size = inode->i_size; 1359b3cbea03SAneesh Kumar K.V v9fs_stat2inode(st, inode, inode->i_sb); 1360b3cbea03SAneesh Kumar K.V if (v9ses->cache) 1361b3cbea03SAneesh Kumar K.V inode->i_size = i_size; 1362b3cbea03SAneesh Kumar K.V spin_unlock(&inode->i_lock); 1363b3cbea03SAneesh Kumar K.V p9stat_free(st); 1364b3cbea03SAneesh Kumar K.V kfree(st); 1365b3cbea03SAneesh Kumar K.V return 0; 1366b3cbea03SAneesh Kumar K.V } 1367b3cbea03SAneesh Kumar K.V 13689b6533c9SSripathi Kodi static const struct inode_operations v9fs_dir_inode_operations_dotu = { 13699b6533c9SSripathi Kodi .create = v9fs_vfs_create, 13709b6533c9SSripathi Kodi .lookup = v9fs_vfs_lookup, 13719b6533c9SSripathi Kodi .symlink = v9fs_vfs_symlink, 137250cc42ffSVenkateswararao Jujjuri (JV) .link = v9fs_vfs_link, 13739b6533c9SSripathi Kodi .unlink = v9fs_vfs_unlink, 13749b6533c9SSripathi Kodi .mkdir = v9fs_vfs_mkdir, 13759b6533c9SSripathi Kodi .rmdir = v9fs_vfs_rmdir, 13761d76e313SAneesh Kumar K.V .mknod = v9fs_vfs_mknod, 13779b6533c9SSripathi Kodi .rename = v9fs_vfs_rename, 13789b6533c9SSripathi Kodi .getattr = v9fs_vfs_getattr, 13799b6533c9SSripathi Kodi .setattr = v9fs_vfs_setattr, 13809b6533c9SSripathi Kodi }; 13819b6533c9SSripathi Kodi 1382754661f1SArjan van de Ven static const struct inode_operations v9fs_dir_inode_operations = { 1383b501611aSEric Van Hensbergen .create = v9fs_vfs_create, 1384b501611aSEric Van Hensbergen .lookup = v9fs_vfs_lookup, 1385b501611aSEric Van Hensbergen .unlink = v9fs_vfs_unlink, 1386b501611aSEric Van Hensbergen .mkdir = v9fs_vfs_mkdir, 1387b501611aSEric Van Hensbergen .rmdir = v9fs_vfs_rmdir, 1388b501611aSEric Van Hensbergen .mknod = v9fs_vfs_mknod, 1389b501611aSEric Van Hensbergen .rename = v9fs_vfs_rename, 1390b501611aSEric Van Hensbergen .getattr = v9fs_vfs_getattr, 1391b501611aSEric Van Hensbergen .setattr = v9fs_vfs_setattr, 1392b501611aSEric Van Hensbergen }; 1393b501611aSEric Van Hensbergen 1394754661f1SArjan van de Ven static const struct inode_operations v9fs_file_inode_operations = { 13952bad8471SEric Van Hensbergen .getattr = v9fs_vfs_getattr, 13962bad8471SEric Van Hensbergen .setattr = v9fs_vfs_setattr, 13972bad8471SEric Van Hensbergen }; 13982bad8471SEric Van Hensbergen 1399754661f1SArjan van de Ven static const struct inode_operations v9fs_symlink_inode_operations = { 1400204f2f0eSAl Viro .readlink = generic_readlink, 14012bad8471SEric Van Hensbergen .follow_link = v9fs_vfs_follow_link, 14022bad8471SEric Van Hensbergen .put_link = v9fs_vfs_put_link, 14032bad8471SEric Van Hensbergen .getattr = v9fs_vfs_getattr, 14042bad8471SEric Van Hensbergen .setattr = v9fs_vfs_setattr, 14052bad8471SEric Van Hensbergen }; 14069b6533c9SSripathi Kodi 1407