11f327613SThomas Gleixner // SPDX-License-Identifier: GPL-2.0-only 22bad8471SEric Van Hensbergen /* 32bad8471SEric Van Hensbergen * linux/fs/9p/vfs_inode.c 42bad8471SEric Van Hensbergen * 573c592b9SEric Van Hensbergen * This file contains vfs inode ops for the 9P2000 protocol. 62bad8471SEric Van Hensbergen * 72bad8471SEric Van Hensbergen * Copyright (C) 2004 by Eric Van Hensbergen <ericvh@gmail.com> 82bad8471SEric Van Hensbergen * Copyright (C) 2002 by Ron Minnich <rminnich@lanl.gov> 92bad8471SEric Van Hensbergen */ 102bad8471SEric Van Hensbergen 115d385153SJoe Perches #define pr_fmt(fmt) KBUILD_MODNAME ": " fmt 125d385153SJoe Perches 132bad8471SEric Van Hensbergen #include <linux/module.h> 142bad8471SEric Van Hensbergen #include <linux/errno.h> 152bad8471SEric Van Hensbergen #include <linux/fs.h> 162bad8471SEric Van Hensbergen #include <linux/file.h> 172bad8471SEric Van Hensbergen #include <linux/pagemap.h> 182bad8471SEric Van Hensbergen #include <linux/stat.h> 192bad8471SEric Van Hensbergen #include <linux/string.h> 202bad8471SEric Van Hensbergen #include <linux/inet.h> 212bad8471SEric Van Hensbergen #include <linux/namei.h> 222bad8471SEric Van Hensbergen #include <linux/idr.h> 23e8edc6e0SAlexey Dobriyan #include <linux/sched.h> 245a0e3ad6STejun Heo #include <linux/slab.h> 25ebf46264SAneesh Kumar K.V #include <linux/xattr.h> 2685ff872dSAneesh Kumar K.V #include <linux/posix_acl.h> 27bd238fb4SLatchesar Ionkov #include <net/9p/9p.h> 28bd238fb4SLatchesar Ionkov #include <net/9p/client.h> 292bad8471SEric Van Hensbergen 302bad8471SEric Van Hensbergen #include "v9fs.h" 312bad8471SEric Van Hensbergen #include "v9fs_vfs.h" 322bad8471SEric Van Hensbergen #include "fid.h" 3360e78d2cSAbhishek Kulkarni #include "cache.h" 34ebf46264SAneesh Kumar K.V #include "xattr.h" 3585ff872dSAneesh Kumar K.V #include "acl.h" 362bad8471SEric Van Hensbergen 37754661f1SArjan van de Ven static const struct inode_operations v9fs_dir_inode_operations; 389b6533c9SSripathi Kodi static const struct inode_operations v9fs_dir_inode_operations_dotu; 39754661f1SArjan van de Ven static const struct inode_operations v9fs_file_inode_operations; 40754661f1SArjan van de Ven static const struct inode_operations v9fs_symlink_inode_operations; 41f5fc6145SAneesh Kumar K.V 422bad8471SEric Van Hensbergen /** 432bad8471SEric Van Hensbergen * unixmode2p9mode - convert unix mode bits to plan 9 442bad8471SEric Van Hensbergen * @v9ses: v9fs session information 452bad8471SEric Van Hensbergen * @mode: mode to convert 462bad8471SEric Van Hensbergen * 472bad8471SEric Van Hensbergen */ 482bad8471SEric Van Hensbergen 493eda0de6SAl Viro static u32 unixmode2p9mode(struct v9fs_session_info *v9ses, umode_t mode) 502bad8471SEric Van Hensbergen { 512bad8471SEric Van Hensbergen int res; 522bad8471SEric Van Hensbergen res = mode & 0777; 532bad8471SEric Van Hensbergen if (S_ISDIR(mode)) 54bd238fb4SLatchesar Ionkov res |= P9_DMDIR; 55dd6102fbSSripathi Kodi if (v9fs_proto_dotu(v9ses)) { 562bad8471SEric Van Hensbergen if (v9ses->nodev == 0) { 572bad8471SEric Van Hensbergen if (S_ISSOCK(mode)) 58bd238fb4SLatchesar Ionkov res |= P9_DMSOCKET; 592bad8471SEric Van Hensbergen if (S_ISFIFO(mode)) 60bd238fb4SLatchesar Ionkov res |= P9_DMNAMEDPIPE; 612bad8471SEric Van Hensbergen if (S_ISBLK(mode)) 62bd238fb4SLatchesar Ionkov res |= P9_DMDEVICE; 632bad8471SEric Van Hensbergen if (S_ISCHR(mode)) 64bd238fb4SLatchesar Ionkov res |= P9_DMDEVICE; 652bad8471SEric Van Hensbergen } 662bad8471SEric Van Hensbergen 672bad8471SEric Van Hensbergen if ((mode & S_ISUID) == S_ISUID) 68bd238fb4SLatchesar Ionkov res |= P9_DMSETUID; 692bad8471SEric Van Hensbergen if ((mode & S_ISGID) == S_ISGID) 70bd238fb4SLatchesar Ionkov res |= P9_DMSETGID; 71d199d652SAnthony Liguori if ((mode & S_ISVTX) == S_ISVTX) 72d199d652SAnthony Liguori res |= P9_DMSETVTX; 732bad8471SEric Van Hensbergen } 742bad8471SEric Van Hensbergen return res; 752bad8471SEric Van Hensbergen } 762bad8471SEric Van Hensbergen 772bad8471SEric Van Hensbergen /** 78df345c67SAneesh Kumar K.V * p9mode2perm- convert plan9 mode bits to unix permission bits 79df345c67SAneesh Kumar K.V * @v9ses: v9fs session information 80df345c67SAneesh Kumar K.V * @stat: p9_wstat from which mode need to be derived 81df345c67SAneesh Kumar K.V * 82df345c67SAneesh Kumar K.V */ 83df345c67SAneesh Kumar K.V static int p9mode2perm(struct v9fs_session_info *v9ses, 84df345c67SAneesh Kumar K.V struct p9_wstat *stat) 85df345c67SAneesh Kumar K.V { 86df345c67SAneesh Kumar K.V int res; 87df345c67SAneesh Kumar K.V int mode = stat->mode; 88df345c67SAneesh Kumar K.V 89df345c67SAneesh Kumar K.V res = mode & S_IALLUGO; 90df345c67SAneesh Kumar K.V if (v9fs_proto_dotu(v9ses)) { 91df345c67SAneesh Kumar K.V if ((mode & P9_DMSETUID) == P9_DMSETUID) 92df345c67SAneesh Kumar K.V res |= S_ISUID; 93df345c67SAneesh Kumar K.V 94df345c67SAneesh Kumar K.V if ((mode & P9_DMSETGID) == P9_DMSETGID) 95df345c67SAneesh Kumar K.V res |= S_ISGID; 96df345c67SAneesh Kumar K.V 97df345c67SAneesh Kumar K.V if ((mode & P9_DMSETVTX) == P9_DMSETVTX) 98df345c67SAneesh Kumar K.V res |= S_ISVTX; 99df345c67SAneesh Kumar K.V } 100df345c67SAneesh Kumar K.V return res; 101df345c67SAneesh Kumar K.V } 102df345c67SAneesh Kumar K.V 103df345c67SAneesh Kumar K.V /** 1042bad8471SEric Van Hensbergen * p9mode2unixmode- convert plan9 mode bits to unix mode bits 1052bad8471SEric Van Hensbergen * @v9ses: v9fs session information 10645089142SAneesh Kumar K.V * @stat: p9_wstat from which mode need to be derived 10745089142SAneesh Kumar K.V * @rdev: major number, minor number in case of device files. 1082bad8471SEric Van Hensbergen * 1092bad8471SEric Van Hensbergen */ 1103eda0de6SAl Viro static umode_t p9mode2unixmode(struct v9fs_session_info *v9ses, 11145089142SAneesh Kumar K.V struct p9_wstat *stat, dev_t *rdev) 1122bad8471SEric Van Hensbergen { 1132bad8471SEric Van Hensbergen int res; 1143eda0de6SAl Viro u32 mode = stat->mode; 1152bad8471SEric Van Hensbergen 11645089142SAneesh Kumar K.V *rdev = 0; 117df345c67SAneesh Kumar K.V res = p9mode2perm(v9ses, stat); 1182bad8471SEric Van Hensbergen 119bd238fb4SLatchesar Ionkov if ((mode & P9_DMDIR) == P9_DMDIR) 1202bad8471SEric Van Hensbergen res |= S_IFDIR; 121dd6102fbSSripathi Kodi else if ((mode & P9_DMSYMLINK) && (v9fs_proto_dotu(v9ses))) 1222bad8471SEric Van Hensbergen res |= S_IFLNK; 123dd6102fbSSripathi Kodi else if ((mode & P9_DMSOCKET) && (v9fs_proto_dotu(v9ses)) 1242bad8471SEric Van Hensbergen && (v9ses->nodev == 0)) 1252bad8471SEric Van Hensbergen res |= S_IFSOCK; 126dd6102fbSSripathi Kodi else if ((mode & P9_DMNAMEDPIPE) && (v9fs_proto_dotu(v9ses)) 1272bad8471SEric Van Hensbergen && (v9ses->nodev == 0)) 1282bad8471SEric Van Hensbergen res |= S_IFIFO; 129dd6102fbSSripathi Kodi else if ((mode & P9_DMDEVICE) && (v9fs_proto_dotu(v9ses)) 13045089142SAneesh Kumar K.V && (v9ses->nodev == 0)) { 13145089142SAneesh Kumar K.V char type = 0, ext[32]; 13245089142SAneesh Kumar K.V int major = -1, minor = -1; 13345089142SAneesh Kumar K.V 134b3f8ab4bSChen Gang strlcpy(ext, stat->extension, sizeof(ext)); 135afe604d0SToralf Förster sscanf(ext, "%c %i %i", &type, &major, &minor); 13645089142SAneesh Kumar K.V switch (type) { 13745089142SAneesh Kumar K.V case 'c': 13845089142SAneesh Kumar K.V res |= S_IFCHR; 13945089142SAneesh Kumar K.V break; 14045089142SAneesh Kumar K.V case 'b': 1412bad8471SEric Van Hensbergen res |= S_IFBLK; 14245089142SAneesh Kumar K.V break; 14345089142SAneesh Kumar K.V default: 1445d385153SJoe Perches p9_debug(P9_DEBUG_ERROR, "Unknown special type %c %s\n", 1455d385153SJoe Perches type, stat->extension); 14651958817Szhengbin } 14745089142SAneesh Kumar K.V *rdev = MKDEV(major, minor); 14845089142SAneesh Kumar K.V } else 1492bad8471SEric Van Hensbergen res |= S_IFREG; 1502bad8471SEric Van Hensbergen 1512bad8471SEric Van Hensbergen return res; 1522bad8471SEric Van Hensbergen } 1532bad8471SEric Van Hensbergen 154ee443996SEric Van Hensbergen /** 155ee443996SEric Van Hensbergen * v9fs_uflags2omode- convert posix open flags to plan 9 mode bits 156ee443996SEric Van Hensbergen * @uflags: flags to convert 1572e4bef41SEric Van Hensbergen * @extended: if .u extensions are active 158ee443996SEric Van Hensbergen */ 159ee443996SEric Van Hensbergen 1602e4bef41SEric Van Hensbergen int v9fs_uflags2omode(int uflags, int extended) 1616a3124a3SLatchesar Ionkov { 1626a3124a3SLatchesar Ionkov int ret; 1636a3124a3SLatchesar Ionkov 1646a3124a3SLatchesar Ionkov ret = 0; 1656a3124a3SLatchesar Ionkov switch (uflags&3) { 1666a3124a3SLatchesar Ionkov default: 1676a3124a3SLatchesar Ionkov case O_RDONLY: 168bd238fb4SLatchesar Ionkov ret = P9_OREAD; 1696a3124a3SLatchesar Ionkov break; 1706a3124a3SLatchesar Ionkov 1716a3124a3SLatchesar Ionkov case O_WRONLY: 172bd238fb4SLatchesar Ionkov ret = P9_OWRITE; 1736a3124a3SLatchesar Ionkov break; 1746a3124a3SLatchesar Ionkov 1756a3124a3SLatchesar Ionkov case O_RDWR: 176bd238fb4SLatchesar Ionkov ret = P9_ORDWR; 1776a3124a3SLatchesar Ionkov break; 1786a3124a3SLatchesar Ionkov } 1796a3124a3SLatchesar Ionkov 1802e4bef41SEric Van Hensbergen if (extended) { 1812e4bef41SEric Van Hensbergen if (uflags & O_EXCL) 1822e4bef41SEric Van Hensbergen ret |= P9_OEXCL; 1832e4bef41SEric Van Hensbergen 1846a3124a3SLatchesar Ionkov if (uflags & O_APPEND) 185bd238fb4SLatchesar Ionkov ret |= P9_OAPPEND; 1862e4bef41SEric Van Hensbergen } 1876a3124a3SLatchesar Ionkov 1886a3124a3SLatchesar Ionkov return ret; 1896a3124a3SLatchesar Ionkov } 1906a3124a3SLatchesar Ionkov 1912bad8471SEric Van Hensbergen /** 192531b1094SLatchesar Ionkov * v9fs_blank_wstat - helper function to setup a 9P stat structure 193531b1094SLatchesar Ionkov * @wstat: structure to initialize 1942bad8471SEric Van Hensbergen * 1952bad8471SEric Van Hensbergen */ 1962bad8471SEric Van Hensbergen 1977a4439c4SM. Mohan Kumar void 198bd238fb4SLatchesar Ionkov v9fs_blank_wstat(struct p9_wstat *wstat) 1992bad8471SEric Van Hensbergen { 200531b1094SLatchesar Ionkov wstat->type = ~0; 201531b1094SLatchesar Ionkov wstat->dev = ~0; 202531b1094SLatchesar Ionkov wstat->qid.type = ~0; 203531b1094SLatchesar Ionkov wstat->qid.version = ~0; 204531b1094SLatchesar Ionkov *((long long *)&wstat->qid.path) = ~0; 205531b1094SLatchesar Ionkov wstat->mode = ~0; 206531b1094SLatchesar Ionkov wstat->atime = ~0; 207531b1094SLatchesar Ionkov wstat->mtime = ~0; 208531b1094SLatchesar Ionkov wstat->length = ~0; 209531b1094SLatchesar Ionkov wstat->name = NULL; 210531b1094SLatchesar Ionkov wstat->uid = NULL; 211531b1094SLatchesar Ionkov wstat->gid = NULL; 212531b1094SLatchesar Ionkov wstat->muid = NULL; 213447c5094SEric W. Biederman wstat->n_uid = INVALID_UID; 214447c5094SEric W. Biederman wstat->n_gid = INVALID_GID; 215447c5094SEric W. Biederman wstat->n_muid = INVALID_UID; 216531b1094SLatchesar Ionkov wstat->extension = NULL; 2172bad8471SEric Van Hensbergen } 2182bad8471SEric Van Hensbergen 21960e78d2cSAbhishek Kulkarni /** 22060e78d2cSAbhishek Kulkarni * v9fs_alloc_inode - helper function to allocate an inode 22160e78d2cSAbhishek Kulkarni * 22260e78d2cSAbhishek Kulkarni */ 22360e78d2cSAbhishek Kulkarni struct inode *v9fs_alloc_inode(struct super_block *sb) 22460e78d2cSAbhishek Kulkarni { 225a78ce05dSAneesh Kumar K.V struct v9fs_inode *v9inode; 2262ed0b757SLi Heng v9inode = kmem_cache_alloc(v9fs_inode_cache, GFP_KERNEL); 227a78ce05dSAneesh Kumar K.V if (!v9inode) 22860e78d2cSAbhishek Kulkarni return NULL; 229a78ce05dSAneesh Kumar K.V #ifdef CONFIG_9P_FSCACHE 230a78ce05dSAneesh Kumar K.V v9inode->fscache = NULL; 2318f5fed1eSSasha Levin mutex_init(&v9inode->fscache_lock); 232a78ce05dSAneesh Kumar K.V #endif 2336b39f6d2SAneesh Kumar K.V v9inode->writeback_fid = NULL; 234b3cbea03SAneesh Kumar K.V v9inode->cache_validity = 0; 2355a7e0a8cSAneesh Kumar K.V mutex_init(&v9inode->v_mutex); 236a78ce05dSAneesh Kumar K.V return &v9inode->vfs_inode; 23760e78d2cSAbhishek Kulkarni } 23860e78d2cSAbhishek Kulkarni 23960e78d2cSAbhishek Kulkarni /** 2405e8a0770SAl Viro * v9fs_free_inode - destroy an inode 24160e78d2cSAbhishek Kulkarni * 24260e78d2cSAbhishek Kulkarni */ 24360e78d2cSAbhishek Kulkarni 2445e8a0770SAl Viro void v9fs_free_inode(struct inode *inode) 245fa0d7e3dSNick Piggin { 246a78ce05dSAneesh Kumar K.V kmem_cache_free(v9fs_inode_cache, V9FS_I(inode)); 247fa0d7e3dSNick Piggin } 248fa0d7e3dSNick Piggin 2495ffc0cb3SAneesh Kumar K.V int v9fs_init_inode(struct v9fs_session_info *v9ses, 2503eda0de6SAl Viro struct inode *inode, umode_t mode, dev_t rdev) 2512bad8471SEric Van Hensbergen { 2525ffc0cb3SAneesh Kumar K.V int err = 0; 2532bb54115SAbhishek Kulkarni 254217f206dSDmitry Monakhov inode_init_owner(inode, NULL, mode); 2552bad8471SEric Van Hensbergen inode->i_blocks = 0; 25645089142SAneesh Kumar K.V inode->i_rdev = rdev; 257078cd827SDeepa Dinamani inode->i_atime = inode->i_mtime = inode->i_ctime = current_time(inode); 258147b31cfSEric Van Hensbergen inode->i_mapping->a_ops = &v9fs_addr_operations; 2592bad8471SEric Van Hensbergen 2602bad8471SEric Van Hensbergen switch (mode & S_IFMT) { 2612bad8471SEric Van Hensbergen case S_IFIFO: 2622bad8471SEric Van Hensbergen case S_IFBLK: 2632bad8471SEric Van Hensbergen case S_IFCHR: 2642bad8471SEric Van Hensbergen case S_IFSOCK: 2654b43516aSM. Mohan Kumar if (v9fs_proto_dotl(v9ses)) { 2664b43516aSM. Mohan Kumar inode->i_op = &v9fs_file_inode_operations_dotl; 2674b43516aSM. Mohan Kumar } else if (v9fs_proto_dotu(v9ses)) { 2684b43516aSM. Mohan Kumar inode->i_op = &v9fs_file_inode_operations; 2694b43516aSM. Mohan Kumar } else { 2705d385153SJoe Perches p9_debug(P9_DEBUG_ERROR, 271bd238fb4SLatchesar Ionkov "special files without extended mode\n"); 2722bb54115SAbhishek Kulkarni err = -EINVAL; 2732bb54115SAbhishek Kulkarni goto error; 274b501611aSEric Van Hensbergen } 2752bb54115SAbhishek Kulkarni init_special_inode(inode, inode->i_mode, inode->i_rdev); 2765d58bec5SEric Van Hensbergen break; 2772bad8471SEric Van Hensbergen case S_IFREG: 2789b6533c9SSripathi Kodi if (v9fs_proto_dotl(v9ses)) { 2799b6533c9SSripathi Kodi inode->i_op = &v9fs_file_inode_operations_dotl; 280fb89b45cSDominique Martinet if (v9ses->cache == CACHE_LOOSE || 281fb89b45cSDominique Martinet v9ses->cache == CACHE_FSCACHE) 28229236f4eSAneesh Kumar K.V inode->i_fop = 28329236f4eSAneesh Kumar K.V &v9fs_cached_file_operations_dotl; 284fb89b45cSDominique Martinet else if (v9ses->cache == CACHE_MMAP) 285fb89b45cSDominique Martinet inode->i_fop = &v9fs_mmap_file_operations_dotl; 28629236f4eSAneesh Kumar K.V else 2879b6533c9SSripathi Kodi inode->i_fop = &v9fs_file_operations_dotl; 2889b6533c9SSripathi Kodi } else { 2892bad8471SEric Van Hensbergen inode->i_op = &v9fs_file_inode_operations; 290fb89b45cSDominique Martinet if (v9ses->cache == CACHE_LOOSE || 291fb89b45cSDominique Martinet v9ses->cache == CACHE_FSCACHE) 292fb89b45cSDominique Martinet inode->i_fop = 293fb89b45cSDominique Martinet &v9fs_cached_file_operations; 294fb89b45cSDominique Martinet else if (v9ses->cache == CACHE_MMAP) 295fb89b45cSDominique Martinet inode->i_fop = &v9fs_mmap_file_operations; 29629236f4eSAneesh Kumar K.V else 2972bad8471SEric Van Hensbergen inode->i_fop = &v9fs_file_operations; 2989b6533c9SSripathi Kodi } 2999b6533c9SSripathi Kodi 3002bad8471SEric Van Hensbergen break; 301b501611aSEric Van Hensbergen case S_IFLNK: 3029b6533c9SSripathi Kodi if (!v9fs_proto_dotu(v9ses) && !v9fs_proto_dotl(v9ses)) { 3035d385153SJoe Perches p9_debug(P9_DEBUG_ERROR, 3045d385153SJoe Perches "extended modes used with legacy protocol\n"); 3052bb54115SAbhishek Kulkarni err = -EINVAL; 3062bb54115SAbhishek Kulkarni goto error; 307b501611aSEric Van Hensbergen } 3089b6533c9SSripathi Kodi 3099b6533c9SSripathi Kodi if (v9fs_proto_dotl(v9ses)) 3109b6533c9SSripathi Kodi inode->i_op = &v9fs_symlink_inode_operations_dotl; 3119b6533c9SSripathi Kodi else 312b501611aSEric Van Hensbergen inode->i_op = &v9fs_symlink_inode_operations; 3139b6533c9SSripathi Kodi 314b501611aSEric Van Hensbergen break; 3152bad8471SEric Van Hensbergen case S_IFDIR: 316d8c76e6fSDave Hansen inc_nlink(inode); 3179b6533c9SSripathi Kodi if (v9fs_proto_dotl(v9ses)) 3189b6533c9SSripathi Kodi inode->i_op = &v9fs_dir_inode_operations_dotl; 3199b6533c9SSripathi Kodi else if (v9fs_proto_dotu(v9ses)) 3209b6533c9SSripathi Kodi inode->i_op = &v9fs_dir_inode_operations_dotu; 321b501611aSEric Van Hensbergen else 3222bad8471SEric Van Hensbergen inode->i_op = &v9fs_dir_inode_operations; 3239b6533c9SSripathi Kodi 3249b6533c9SSripathi Kodi if (v9fs_proto_dotl(v9ses)) 3259b6533c9SSripathi Kodi inode->i_fop = &v9fs_dir_operations_dotl; 3269b6533c9SSripathi Kodi else 3272bad8471SEric Van Hensbergen inode->i_fop = &v9fs_dir_operations; 3289b6533c9SSripathi Kodi 3292bad8471SEric Van Hensbergen break; 3302bad8471SEric Van Hensbergen default: 331609eac1cSLinus Torvalds p9_debug(P9_DEBUG_ERROR, "BAD mode 0x%hx S_IFMT 0x%x\n", 3322bad8471SEric Van Hensbergen mode, mode & S_IFMT); 3332bb54115SAbhishek Kulkarni err = -EINVAL; 3342bb54115SAbhishek Kulkarni goto error; 3352bad8471SEric Van Hensbergen } 3362bb54115SAbhishek Kulkarni error: 3375ffc0cb3SAneesh Kumar K.V return err; 3385ffc0cb3SAneesh Kumar K.V 3395ffc0cb3SAneesh Kumar K.V } 3405ffc0cb3SAneesh Kumar K.V 3415ffc0cb3SAneesh Kumar K.V /** 3425ffc0cb3SAneesh Kumar K.V * v9fs_get_inode - helper function to setup an inode 3435ffc0cb3SAneesh Kumar K.V * @sb: superblock 3445ffc0cb3SAneesh Kumar K.V * @mode: mode to setup inode with 3455ffc0cb3SAneesh Kumar K.V * 3465ffc0cb3SAneesh Kumar K.V */ 3475ffc0cb3SAneesh Kumar K.V 3483eda0de6SAl Viro struct inode *v9fs_get_inode(struct super_block *sb, umode_t mode, dev_t rdev) 3495ffc0cb3SAneesh Kumar K.V { 3505ffc0cb3SAneesh Kumar K.V int err; 3515ffc0cb3SAneesh Kumar K.V struct inode *inode; 3525ffc0cb3SAneesh Kumar K.V struct v9fs_session_info *v9ses = sb->s_fs_info; 3535ffc0cb3SAneesh Kumar K.V 354609eac1cSLinus Torvalds p9_debug(P9_DEBUG_VFS, "super block: %p mode: %ho\n", sb, mode); 3555ffc0cb3SAneesh Kumar K.V 3565ffc0cb3SAneesh Kumar K.V inode = new_inode(sb); 3575ffc0cb3SAneesh Kumar K.V if (!inode) { 3585d385153SJoe Perches pr_warn("%s (%d): Problem allocating inode\n", 3595d385153SJoe Perches __func__, task_pid_nr(current)); 3605ffc0cb3SAneesh Kumar K.V return ERR_PTR(-ENOMEM); 3615ffc0cb3SAneesh Kumar K.V } 36245089142SAneesh Kumar K.V err = v9fs_init_inode(v9ses, inode, mode, rdev); 3635ffc0cb3SAneesh Kumar K.V if (err) { 3642bb54115SAbhishek Kulkarni iput(inode); 3652bb54115SAbhishek Kulkarni return ERR_PTR(err); 3662bad8471SEric Van Hensbergen } 3675ffc0cb3SAneesh Kumar K.V return inode; 3685ffc0cb3SAneesh Kumar K.V } 3692bad8471SEric Van Hensbergen 37060e78d2cSAbhishek Kulkarni /** 37160e78d2cSAbhishek Kulkarni * v9fs_clear_inode - release an inode 37260e78d2cSAbhishek Kulkarni * @inode: inode to release 37360e78d2cSAbhishek Kulkarni * 37460e78d2cSAbhishek Kulkarni */ 375b57922d9SAl Viro void v9fs_evict_inode(struct inode *inode) 37660e78d2cSAbhishek Kulkarni { 3776b39f6d2SAneesh Kumar K.V struct v9fs_inode *v9inode = V9FS_I(inode); 3786b39f6d2SAneesh Kumar K.V 3794ad78628SAl Viro truncate_inode_pages_final(&inode->i_data); 380dbd5768fSJan Kara clear_inode(inode); 3814ad78628SAl Viro filemap_fdatawrite(&inode->i_data); 38260e78d2cSAbhishek Kulkarni 38360e78d2cSAbhishek Kulkarni v9fs_cache_inode_put_cookie(inode); 3846b39f6d2SAneesh Kumar K.V /* clunk the fid stashed in writeback_fid */ 3856b39f6d2SAneesh Kumar K.V if (v9inode->writeback_fid) { 3866b39f6d2SAneesh Kumar K.V p9_client_clunk(v9inode->writeback_fid); 3876b39f6d2SAneesh Kumar K.V v9inode->writeback_fid = NULL; 3883cf387d7SAneesh Kumar K.V } 38960e78d2cSAbhishek Kulkarni } 39060e78d2cSAbhishek Kulkarni 391fd2421f5SAneesh Kumar K.V static int v9fs_test_inode(struct inode *inode, void *data) 392fd2421f5SAneesh Kumar K.V { 393fd2421f5SAneesh Kumar K.V int umode; 39445089142SAneesh Kumar K.V dev_t rdev; 395fd2421f5SAneesh Kumar K.V struct v9fs_inode *v9inode = V9FS_I(inode); 396fd2421f5SAneesh Kumar K.V struct p9_wstat *st = (struct p9_wstat *)data; 397fd2421f5SAneesh Kumar K.V struct v9fs_session_info *v9ses = v9fs_inode2v9ses(inode); 398fd2421f5SAneesh Kumar K.V 39945089142SAneesh Kumar K.V umode = p9mode2unixmode(v9ses, st, &rdev); 400fd2421f5SAneesh Kumar K.V /* don't match inode of different type */ 401fd2421f5SAneesh Kumar K.V if ((inode->i_mode & S_IFMT) != (umode & S_IFMT)) 402fd2421f5SAneesh Kumar K.V return 0; 403fd2421f5SAneesh Kumar K.V 404fd2421f5SAneesh Kumar K.V /* compare qid details */ 405fd2421f5SAneesh Kumar K.V if (memcmp(&v9inode->qid.version, 406fd2421f5SAneesh Kumar K.V &st->qid.version, sizeof(v9inode->qid.version))) 407fd2421f5SAneesh Kumar K.V return 0; 408fd2421f5SAneesh Kumar K.V 409fd2421f5SAneesh Kumar K.V if (v9inode->qid.type != st->qid.type) 410fd2421f5SAneesh Kumar K.V return 0; 4118ee03163STuomas Tynkkynen 4128ee03163STuomas Tynkkynen if (v9inode->qid.path != st->qid.path) 4138ee03163STuomas Tynkkynen return 0; 414fd2421f5SAneesh Kumar K.V return 1; 415fd2421f5SAneesh Kumar K.V } 416fd2421f5SAneesh Kumar K.V 417ed80fcfaSAneesh Kumar K.V static int v9fs_test_new_inode(struct inode *inode, void *data) 418ed80fcfaSAneesh Kumar K.V { 419ed80fcfaSAneesh Kumar K.V return 0; 420ed80fcfaSAneesh Kumar K.V } 421ed80fcfaSAneesh Kumar K.V 422fd2421f5SAneesh Kumar K.V static int v9fs_set_inode(struct inode *inode, void *data) 423fd2421f5SAneesh Kumar K.V { 424fd2421f5SAneesh Kumar K.V struct v9fs_inode *v9inode = V9FS_I(inode); 425fd2421f5SAneesh Kumar K.V struct p9_wstat *st = (struct p9_wstat *)data; 426fd2421f5SAneesh Kumar K.V 427fd2421f5SAneesh Kumar K.V memcpy(&v9inode->qid, &st->qid, sizeof(st->qid)); 428fd2421f5SAneesh Kumar K.V return 0; 429fd2421f5SAneesh Kumar K.V } 430fd2421f5SAneesh Kumar K.V 4315ffc0cb3SAneesh Kumar K.V static struct inode *v9fs_qid_iget(struct super_block *sb, 4325ffc0cb3SAneesh Kumar K.V struct p9_qid *qid, 433ed80fcfaSAneesh Kumar K.V struct p9_wstat *st, 434ed80fcfaSAneesh Kumar K.V int new) 4355ffc0cb3SAneesh Kumar K.V { 43645089142SAneesh Kumar K.V dev_t rdev; 4373eda0de6SAl Viro int retval; 4383eda0de6SAl Viro umode_t umode; 4395ffc0cb3SAneesh Kumar K.V unsigned long i_ino; 4405ffc0cb3SAneesh Kumar K.V struct inode *inode; 4415ffc0cb3SAneesh Kumar K.V struct v9fs_session_info *v9ses = sb->s_fs_info; 442ed80fcfaSAneesh Kumar K.V int (*test)(struct inode *, void *); 443ed80fcfaSAneesh Kumar K.V 444ed80fcfaSAneesh Kumar K.V if (new) 445ed80fcfaSAneesh Kumar K.V test = v9fs_test_new_inode; 446ed80fcfaSAneesh Kumar K.V else 447ed80fcfaSAneesh Kumar K.V test = v9fs_test_inode; 4485ffc0cb3SAneesh Kumar K.V 4495ffc0cb3SAneesh Kumar K.V i_ino = v9fs_qid2ino(qid); 450ed80fcfaSAneesh Kumar K.V inode = iget5_locked(sb, i_ino, test, v9fs_set_inode, st); 4515ffc0cb3SAneesh Kumar K.V if (!inode) 4525ffc0cb3SAneesh Kumar K.V return ERR_PTR(-ENOMEM); 4535ffc0cb3SAneesh Kumar K.V if (!(inode->i_state & I_NEW)) 4545ffc0cb3SAneesh Kumar K.V return inode; 4555ffc0cb3SAneesh Kumar K.V /* 4565ffc0cb3SAneesh Kumar K.V * initialize the inode with the stat info 4575ffc0cb3SAneesh Kumar K.V * FIXME!! we may need support for stale inodes 4585ffc0cb3SAneesh Kumar K.V * later. 4595ffc0cb3SAneesh Kumar K.V */ 460fd2421f5SAneesh Kumar K.V inode->i_ino = i_ino; 46145089142SAneesh Kumar K.V umode = p9mode2unixmode(v9ses, st, &rdev); 46245089142SAneesh Kumar K.V retval = v9fs_init_inode(v9ses, inode, umode, rdev); 4635ffc0cb3SAneesh Kumar K.V if (retval) 4645ffc0cb3SAneesh Kumar K.V goto error; 4655ffc0cb3SAneesh Kumar K.V 4665e3cc1eeSHou Tao v9fs_stat2inode(st, inode, sb, 0); 4675ffc0cb3SAneesh Kumar K.V v9fs_cache_inode_get_cookie(inode); 4685ffc0cb3SAneesh Kumar K.V unlock_new_inode(inode); 4695ffc0cb3SAneesh Kumar K.V return inode; 4705ffc0cb3SAneesh Kumar K.V error: 4710a73d0a2SAl Viro iget_failed(inode); 4725ffc0cb3SAneesh Kumar K.V return ERR_PTR(retval); 4735ffc0cb3SAneesh Kumar K.V 4745ffc0cb3SAneesh Kumar K.V } 4755ffc0cb3SAneesh Kumar K.V 47653c06f4eSAneesh Kumar K.V struct inode * 477a78ce05dSAneesh Kumar K.V v9fs_inode_from_fid(struct v9fs_session_info *v9ses, struct p9_fid *fid, 478ed80fcfaSAneesh Kumar K.V struct super_block *sb, int new) 4796a3124a3SLatchesar Ionkov { 48051a87c55SEric Van Hensbergen struct p9_wstat *st; 4815ffc0cb3SAneesh Kumar K.V struct inode *inode = NULL; 4826a3124a3SLatchesar Ionkov 483bd238fb4SLatchesar Ionkov st = p9_client_stat(fid); 48402bc3567SAbhishek Kulkarni if (IS_ERR(st)) 48502bc3567SAbhishek Kulkarni return ERR_CAST(st); 4862bad8471SEric Van Hensbergen 487ed80fcfaSAneesh Kumar K.V inode = v9fs_qid_iget(sb, &st->qid, st, new); 48802bc3567SAbhishek Kulkarni p9stat_free(st); 489bd238fb4SLatchesar Ionkov kfree(st); 4905ffc0cb3SAneesh Kumar K.V return inode; 4912bad8471SEric Van Hensbergen } 4922bad8471SEric Van Hensbergen 4932bad8471SEric Van Hensbergen /** 494f88657ceSAneesh Kumar K.V * v9fs_at_to_dotl_flags- convert Linux specific AT flags to 495f88657ceSAneesh Kumar K.V * plan 9 AT flag. 496f88657ceSAneesh Kumar K.V * @flags: flags to convert 497f88657ceSAneesh Kumar K.V */ 498f88657ceSAneesh Kumar K.V static int v9fs_at_to_dotl_flags(int flags) 499f88657ceSAneesh Kumar K.V { 500f88657ceSAneesh Kumar K.V int rflags = 0; 501f88657ceSAneesh Kumar K.V if (flags & AT_REMOVEDIR) 502f88657ceSAneesh Kumar K.V rflags |= P9_DOTL_AT_REMOVEDIR; 503f88657ceSAneesh Kumar K.V return rflags; 504f88657ceSAneesh Kumar K.V } 505f88657ceSAneesh Kumar K.V 506f88657ceSAneesh Kumar K.V /** 507ac89b2efSEryu Guan * v9fs_dec_count - helper functon to drop i_nlink. 508ac89b2efSEryu Guan * 509ac89b2efSEryu Guan * If a directory had nlink <= 2 (including . and ..), then we should not drop 510ac89b2efSEryu Guan * the link count, which indicates the underlying exported fs doesn't maintain 511ac89b2efSEryu Guan * nlink accurately. e.g. 512ac89b2efSEryu Guan * - overlayfs sets nlink to 1 for merged dir 513ac89b2efSEryu Guan * - ext4 (with dir_nlink feature enabled) sets nlink to 1 if a dir has more 514ac89b2efSEryu Guan * than EXT4_LINK_MAX (65000) links. 515ac89b2efSEryu Guan * 516ac89b2efSEryu Guan * @inode: inode whose nlink is being dropped 517ac89b2efSEryu Guan */ 518ac89b2efSEryu Guan static void v9fs_dec_count(struct inode *inode) 519ac89b2efSEryu Guan { 520ac89b2efSEryu Guan if (!S_ISDIR(inode->i_mode) || inode->i_nlink > 2) 521ac89b2efSEryu Guan drop_nlink(inode); 522ac89b2efSEryu Guan } 523ac89b2efSEryu Guan 524ac89b2efSEryu Guan /** 5252bad8471SEric Van Hensbergen * v9fs_remove - helper function to remove files and directories 52673c592b9SEric Van Hensbergen * @dir: directory inode that is being deleted 52748e370ffSAneesh Kumar K.V * @dentry: dentry that is being deleted 528fd2916bdSFabian Frederick * @flags: removing a directory 5292bad8471SEric Van Hensbergen * 5302bad8471SEric Van Hensbergen */ 5312bad8471SEric Van Hensbergen 53248e370ffSAneesh Kumar K.V static int v9fs_remove(struct inode *dir, struct dentry *dentry, int flags) 5332bad8471SEric Van Hensbergen { 53448e370ffSAneesh Kumar K.V struct inode *inode; 53548e370ffSAneesh Kumar K.V int retval = -EOPNOTSUPP; 53648e370ffSAneesh Kumar K.V struct p9_fid *v9fid, *dfid; 53748e370ffSAneesh Kumar K.V struct v9fs_session_info *v9ses; 5382bad8471SEric Van Hensbergen 5395d385153SJoe Perches p9_debug(P9_DEBUG_VFS, "inode: %p dentry: %p rmdir: %x\n", 54048e370ffSAneesh Kumar K.V dir, dentry, flags); 5412bad8471SEric Van Hensbergen 54248e370ffSAneesh Kumar K.V v9ses = v9fs_inode2v9ses(dir); 5432b0143b5SDavid Howells inode = d_inode(dentry); 54477d5a6b7SAl Viro dfid = v9fs_parent_fid(dentry); 54548e370ffSAneesh Kumar K.V if (IS_ERR(dfid)) { 54648e370ffSAneesh Kumar K.V retval = PTR_ERR(dfid); 5475d385153SJoe Perches p9_debug(P9_DEBUG_VFS, "fid lookup failed %d\n", retval); 54848e370ffSAneesh Kumar K.V return retval; 54948e370ffSAneesh Kumar K.V } 55048e370ffSAneesh Kumar K.V if (v9fs_proto_dotl(v9ses)) 551f88657ceSAneesh Kumar K.V retval = p9_client_unlinkat(dfid, dentry->d_name.name, 552f88657ceSAneesh Kumar K.V v9fs_at_to_dotl_flags(flags)); 55348e370ffSAneesh Kumar K.V if (retval == -EOPNOTSUPP) { 55448e370ffSAneesh Kumar K.V /* Try the one based on path */ 55548e370ffSAneesh Kumar K.V v9fid = v9fs_fid_clone(dentry); 556da977b2cSEric Van Hensbergen if (IS_ERR(v9fid)) 557da977b2cSEric Van Hensbergen return PTR_ERR(v9fid); 558d994f405SAneesh Kumar K.V retval = p9_client_remove(v9fid); 55948e370ffSAneesh Kumar K.V } 560b271ec47SAneesh Kumar K.V if (!retval) { 561b271ec47SAneesh Kumar K.V /* 562b271ec47SAneesh Kumar K.V * directories on unlink should have zero 563b271ec47SAneesh Kumar K.V * link count 564b271ec47SAneesh Kumar K.V */ 56548e370ffSAneesh Kumar K.V if (flags & AT_REMOVEDIR) { 56648e370ffSAneesh Kumar K.V clear_nlink(inode); 567ac89b2efSEryu Guan v9fs_dec_count(dir); 568b271ec47SAneesh Kumar K.V } else 569ac89b2efSEryu Guan v9fs_dec_count(inode); 570d28c61f0SAneesh Kumar K.V 57148e370ffSAneesh Kumar K.V v9fs_invalidate_inode_attr(inode); 572d28c61f0SAneesh Kumar K.V v9fs_invalidate_inode_attr(dir); 573*154372e6SEric Van Hensbergen 574*154372e6SEric Van Hensbergen /* invalidate all fids associated with dentry */ 575*154372e6SEric Van Hensbergen /* NOTE: This will not include open fids */ 576*154372e6SEric Van Hensbergen dentry->d_op->d_release(dentry); 577b271ec47SAneesh Kumar K.V } 578d994f405SAneesh Kumar K.V return retval; 5792bad8471SEric Van Hensbergen } 5802bad8471SEric Van Hensbergen 581bd238fb4SLatchesar Ionkov /** 582bd238fb4SLatchesar Ionkov * v9fs_create - Create a file 583ee443996SEric Van Hensbergen * @v9ses: session information 584ee443996SEric Van Hensbergen * @dir: directory that dentry is being created in 585bd238fb4SLatchesar Ionkov * @dentry: dentry that is being created 5860e15597eSAbhishek Kulkarni * @extension: 9p2000.u extension string to support devices, etc. 587bd238fb4SLatchesar Ionkov * @perm: create permissions 588bd238fb4SLatchesar Ionkov * @mode: open mode 589bd238fb4SLatchesar Ionkov * 590bd238fb4SLatchesar Ionkov */ 591bd238fb4SLatchesar Ionkov static struct p9_fid * 592bd238fb4SLatchesar Ionkov v9fs_create(struct v9fs_session_info *v9ses, struct inode *dir, 593bd238fb4SLatchesar Ionkov struct dentry *dentry, char *extension, u32 perm, u8 mode) 594bd238fb4SLatchesar Ionkov { 595bd238fb4SLatchesar Ionkov int err; 5967880b43bSAl Viro const unsigned char *name; 597bd238fb4SLatchesar Ionkov struct p9_fid *dfid, *ofid, *fid; 598bd238fb4SLatchesar Ionkov struct inode *inode; 599bd238fb4SLatchesar Ionkov 6004b8e9923SAl Viro p9_debug(P9_DEBUG_VFS, "name %pd\n", dentry); 60151a87c55SEric Van Hensbergen 602bd238fb4SLatchesar Ionkov err = 0; 603bd238fb4SLatchesar Ionkov ofid = NULL; 604bd238fb4SLatchesar Ionkov fid = NULL; 6057880b43bSAl Viro name = dentry->d_name.name; 60677d5a6b7SAl Viro dfid = v9fs_parent_fid(dentry); 607bd238fb4SLatchesar Ionkov if (IS_ERR(dfid)) { 608bd238fb4SLatchesar Ionkov err = PTR_ERR(dfid); 6095d385153SJoe Perches p9_debug(P9_DEBUG_VFS, "fid lookup failed %d\n", err); 6106d27e64dSVenkateswararao Jujjuri return ERR_PTR(err); 611bd238fb4SLatchesar Ionkov } 612bd238fb4SLatchesar Ionkov 613bd238fb4SLatchesar Ionkov /* clone a fid to use for creation */ 6147d50a29fSAl Viro ofid = clone_fid(dfid); 615bd238fb4SLatchesar Ionkov if (IS_ERR(ofid)) { 616bd238fb4SLatchesar Ionkov err = PTR_ERR(ofid); 6175d385153SJoe Perches p9_debug(P9_DEBUG_VFS, "p9_client_walk failed %d\n", err); 6186d27e64dSVenkateswararao Jujjuri return ERR_PTR(err); 619bd238fb4SLatchesar Ionkov } 620bd238fb4SLatchesar Ionkov 621bd238fb4SLatchesar Ionkov err = p9_client_fcreate(ofid, name, perm, mode, extension); 62251a87c55SEric Van Hensbergen if (err < 0) { 6235d385153SJoe Perches p9_debug(P9_DEBUG_VFS, "p9_client_fcreate failed %d\n", err); 624bd238fb4SLatchesar Ionkov goto error; 62551a87c55SEric Van Hensbergen } 626bd238fb4SLatchesar Ionkov 627b6054793SAneesh Kumar K.V if (!(perm & P9_DMLINK)) { 628bd238fb4SLatchesar Ionkov /* now walk from the parent so we can get unopened fid */ 6296d27e64dSVenkateswararao Jujjuri fid = p9_client_walk(dfid, 1, &name, 1); 630bd238fb4SLatchesar Ionkov if (IS_ERR(fid)) { 631bd238fb4SLatchesar Ionkov err = PTR_ERR(fid); 632b6054793SAneesh Kumar K.V p9_debug(P9_DEBUG_VFS, 633b6054793SAneesh Kumar K.V "p9_client_walk failed %d\n", err); 634bd238fb4SLatchesar Ionkov fid = NULL; 635bd238fb4SLatchesar Ionkov goto error; 6366d27e64dSVenkateswararao Jujjuri } 637b6054793SAneesh Kumar K.V /* 638b6054793SAneesh Kumar K.V * instantiate inode and assign the unopened fid to the dentry 639b6054793SAneesh Kumar K.V */ 640ed80fcfaSAneesh Kumar K.V inode = v9fs_get_new_inode_from_fid(v9ses, fid, dir->i_sb); 641bd238fb4SLatchesar Ionkov if (IS_ERR(inode)) { 642bd238fb4SLatchesar Ionkov err = PTR_ERR(inode); 643b6054793SAneesh Kumar K.V p9_debug(P9_DEBUG_VFS, 644b6054793SAneesh Kumar K.V "inode creation failed %d\n", err); 645bd238fb4SLatchesar Ionkov goto error; 646bd238fb4SLatchesar Ionkov } 6472ea03e1dSAl Viro v9fs_fid_add(dentry, fid); 6485441ae5eSAneesh Kumar K.V d_instantiate(dentry, inode); 649b6054793SAneesh Kumar K.V } 650bd238fb4SLatchesar Ionkov return ofid; 651bd238fb4SLatchesar Ionkov error: 652bd238fb4SLatchesar Ionkov if (ofid) 653bd238fb4SLatchesar Ionkov p9_client_clunk(ofid); 654bd238fb4SLatchesar Ionkov 655bd238fb4SLatchesar Ionkov if (fid) 656bd238fb4SLatchesar Ionkov p9_client_clunk(fid); 657bd238fb4SLatchesar Ionkov 658bd238fb4SLatchesar Ionkov return ERR_PTR(err); 659bd238fb4SLatchesar Ionkov } 660bd238fb4SLatchesar Ionkov 6612bad8471SEric Van Hensbergen /** 662e43ae79cSMiklos Szeredi * v9fs_vfs_create - VFS hook to create a regular file 663e43ae79cSMiklos Szeredi * 664e43ae79cSMiklos Szeredi * open(.., O_CREAT) is handled in v9fs_vfs_atomic_open(). This is only called 665e43ae79cSMiklos Szeredi * for mknod(2). 666e43ae79cSMiklos Szeredi * 667ee443996SEric Van Hensbergen * @dir: directory inode that is being created 6682bad8471SEric Van Hensbergen * @dentry: dentry that is being deleted 6696a3124a3SLatchesar Ionkov * @mode: create permissions 6702bad8471SEric Van Hensbergen * 6712bad8471SEric Van Hensbergen */ 6722bad8471SEric Van Hensbergen 6732bad8471SEric Van Hensbergen static int 6744acdaf27SAl Viro v9fs_vfs_create(struct inode *dir, struct dentry *dentry, umode_t mode, 675ebfc3b49SAl Viro bool excl) 6762bad8471SEric Van Hensbergen { 677e43ae79cSMiklos Szeredi struct v9fs_session_info *v9ses = v9fs_inode2v9ses(dir); 678e43ae79cSMiklos Szeredi u32 perm = unixmode2p9mode(v9ses, mode); 679e43ae79cSMiklos Szeredi struct p9_fid *fid; 6806a3124a3SLatchesar Ionkov 681e43ae79cSMiklos Szeredi /* P9_OEXCL? */ 682e43ae79cSMiklos Szeredi fid = v9fs_create(v9ses, dir, dentry, NULL, perm, P9_ORDWR); 683e43ae79cSMiklos Szeredi if (IS_ERR(fid)) 684e43ae79cSMiklos Szeredi return PTR_ERR(fid); 6856a3124a3SLatchesar Ionkov 686d28c61f0SAneesh Kumar K.V v9fs_invalidate_inode_attr(dir); 687bd238fb4SLatchesar Ionkov p9_client_clunk(fid); 6886a3124a3SLatchesar Ionkov 6896a3124a3SLatchesar Ionkov return 0; 6902bad8471SEric Van Hensbergen } 6912bad8471SEric Van Hensbergen 6922bad8471SEric Van Hensbergen /** 6932bad8471SEric Van Hensbergen * v9fs_vfs_mkdir - VFS mkdir hook to create a directory 694ee443996SEric Van Hensbergen * @dir: inode that is being unlinked 6952bad8471SEric Van Hensbergen * @dentry: dentry that is being unlinked 6962bad8471SEric Van Hensbergen * @mode: mode for new directory 6972bad8471SEric Van Hensbergen * 6982bad8471SEric Van Hensbergen */ 6992bad8471SEric Van Hensbergen 70018bb1db3SAl Viro static int v9fs_vfs_mkdir(struct inode *dir, struct dentry *dentry, umode_t mode) 7012bad8471SEric Van Hensbergen { 7026a3124a3SLatchesar Ionkov int err; 703bd238fb4SLatchesar Ionkov u32 perm; 704bd238fb4SLatchesar Ionkov struct p9_fid *fid; 705d28c61f0SAneesh Kumar K.V struct v9fs_session_info *v9ses; 7066a3124a3SLatchesar Ionkov 7074b8e9923SAl Viro p9_debug(P9_DEBUG_VFS, "name %pd\n", dentry); 708bd238fb4SLatchesar Ionkov err = 0; 7096a3124a3SLatchesar Ionkov v9ses = v9fs_inode2v9ses(dir); 7106a3124a3SLatchesar Ionkov perm = unixmode2p9mode(v9ses, mode | S_IFDIR); 711bd238fb4SLatchesar Ionkov fid = v9fs_create(v9ses, dir, dentry, NULL, perm, P9_OREAD); 712bd238fb4SLatchesar Ionkov if (IS_ERR(fid)) { 713bd238fb4SLatchesar Ionkov err = PTR_ERR(fid); 714bd238fb4SLatchesar Ionkov fid = NULL; 715d28c61f0SAneesh Kumar K.V } else { 716b271ec47SAneesh Kumar K.V inc_nlink(dir); 717d28c61f0SAneesh Kumar K.V v9fs_invalidate_inode_attr(dir); 718d28c61f0SAneesh Kumar K.V } 7196a3124a3SLatchesar Ionkov 720bd238fb4SLatchesar Ionkov if (fid) 721bd238fb4SLatchesar Ionkov p9_client_clunk(fid); 7226a3124a3SLatchesar Ionkov 7236a3124a3SLatchesar Ionkov return err; 7242bad8471SEric Van Hensbergen } 7252bad8471SEric Van Hensbergen 7262bad8471SEric Van Hensbergen /** 7272bad8471SEric Van Hensbergen * v9fs_vfs_lookup - VFS lookup hook to "walk" to a new inode 7282bad8471SEric Van Hensbergen * @dir: inode that is being walked from 7292bad8471SEric Van Hensbergen * @dentry: dentry that is being walked to? 730fd2916bdSFabian Frederick * @flags: lookup flags (unused) 7312bad8471SEric Van Hensbergen * 7322bad8471SEric Van Hensbergen */ 7332bad8471SEric Van Hensbergen 73453c06f4eSAneesh Kumar K.V struct dentry *v9fs_vfs_lookup(struct inode *dir, struct dentry *dentry, 73500cd8dd3SAl Viro unsigned int flags) 7362bad8471SEric Van Hensbergen { 73773f50717SAneesh Kumar K.V struct dentry *res; 7382bad8471SEric Van Hensbergen struct v9fs_session_info *v9ses; 739bd238fb4SLatchesar Ionkov struct p9_fid *dfid, *fid; 7402bad8471SEric Van Hensbergen struct inode *inode; 7417880b43bSAl Viro const unsigned char *name; 7422bad8471SEric Van Hensbergen 7434b8e9923SAl Viro p9_debug(P9_DEBUG_VFS, "dir: %p dentry: (%pd) %p flags: %x\n", 7444b8e9923SAl Viro dir, dentry, dentry, flags); 7452bad8471SEric Van Hensbergen 74611e9b49bSSripathi Kodi if (dentry->d_name.len > NAME_MAX) 74711e9b49bSSripathi Kodi return ERR_PTR(-ENAMETOOLONG); 74811e9b49bSSripathi Kodi 7492bad8471SEric Van Hensbergen v9ses = v9fs_inode2v9ses(dir); 750a534c8d1SAneesh Kumar K.V /* We can walk d_parent because we hold the dir->i_mutex */ 75177d5a6b7SAl Viro dfid = v9fs_parent_fid(dentry); 752bd238fb4SLatchesar Ionkov if (IS_ERR(dfid)) 753e231c2eeSDavid Howells return ERR_CAST(dfid); 7542bad8471SEric Van Hensbergen 75573f50717SAneesh Kumar K.V /* 75673f50717SAneesh Kumar K.V * Make sure we don't use a wrong inode due to parallel 75773f50717SAneesh Kumar K.V * unlink. For cached mode create calls request for new 75873f50717SAneesh Kumar K.V * inode. But with cache disabled, lookup should do this. 75973f50717SAneesh Kumar K.V */ 760500e2ab6SAl Viro name = dentry->d_name.name; 761500e2ab6SAl Viro fid = p9_client_walk(dfid, 1, &name, 1); 762500e2ab6SAl Viro if (fid == ERR_PTR(-ENOENT)) 763500e2ab6SAl Viro inode = NULL; 764500e2ab6SAl Viro else if (IS_ERR(fid)) 765500e2ab6SAl Viro inode = ERR_CAST(fid); 766500e2ab6SAl Viro else if (v9ses->cache == CACHE_LOOSE || v9ses->cache == CACHE_FSCACHE) 767a78ce05dSAneesh Kumar K.V inode = v9fs_get_inode_from_fid(v9ses, fid, dir->i_sb); 76873f50717SAneesh Kumar K.V else 76973f50717SAneesh Kumar K.V inode = v9fs_get_new_inode_from_fid(v9ses, fid, dir->i_sb); 77073f50717SAneesh Kumar K.V /* 77173f50717SAneesh Kumar K.V * If we had a rename on the server and a parallel lookup 77273f50717SAneesh Kumar K.V * for the new name, then make sure we instantiate with 77373f50717SAneesh Kumar K.V * the new name. ie look up for a/b, while on server somebody 77473f50717SAneesh Kumar K.V * moved b under k and client parallely did a lookup for 77573f50717SAneesh Kumar K.V * k/b. 77673f50717SAneesh Kumar K.V */ 77741d28bcaSAl Viro res = d_splice_alias(inode, dentry); 778500e2ab6SAl Viro if (!IS_ERR(fid)) { 779a3b2157eSAl Viro if (!res) 780a3b2157eSAl Viro v9fs_fid_add(dentry, fid); 781a3b2157eSAl Viro else if (!IS_ERR(res)) 782a3b2157eSAl Viro v9fs_fid_add(res, fid); 783a3b2157eSAl Viro else 784bd238fb4SLatchesar Ionkov p9_client_clunk(fid); 785500e2ab6SAl Viro } 7867b5be621SAl Viro return res; 7872bad8471SEric Van Hensbergen } 7882bad8471SEric Van Hensbergen 789d9585277SAl Viro static int 790e43ae79cSMiklos Szeredi v9fs_vfs_atomic_open(struct inode *dir, struct dentry *dentry, 79144907d79SAl Viro struct file *file, unsigned flags, umode_t mode) 792e43ae79cSMiklos Szeredi { 793e43ae79cSMiklos Szeredi int err; 794e43ae79cSMiklos Szeredi u32 perm; 795e43ae79cSMiklos Szeredi struct v9fs_inode *v9inode; 796e43ae79cSMiklos Szeredi struct v9fs_session_info *v9ses; 797e43ae79cSMiklos Szeredi struct p9_fid *fid, *inode_fid; 798e43ae79cSMiklos Szeredi struct dentry *res = NULL; 799e43ae79cSMiklos Szeredi 80000699ad8SAl Viro if (d_in_lookup(dentry)) { 80100cd8dd3SAl Viro res = v9fs_vfs_lookup(dir, dentry, 0); 802e43ae79cSMiklos Szeredi if (IS_ERR(res)) 803d9585277SAl Viro return PTR_ERR(res); 804e43ae79cSMiklos Szeredi 805e43ae79cSMiklos Szeredi if (res) 806e43ae79cSMiklos Szeredi dentry = res; 807e43ae79cSMiklos Szeredi } 808e43ae79cSMiklos Szeredi 809e43ae79cSMiklos Szeredi /* Only creates */ 8102b0143b5SDavid Howells if (!(flags & O_CREAT) || d_really_is_positive(dentry)) 811e45198a6SAl Viro return finish_no_open(file, res); 812e43ae79cSMiklos Szeredi 813e43ae79cSMiklos Szeredi err = 0; 814fae74696SGeyslan G. Bem 815e43ae79cSMiklos Szeredi v9ses = v9fs_inode2v9ses(dir); 816e43ae79cSMiklos Szeredi perm = unixmode2p9mode(v9ses, mode); 817e43ae79cSMiklos Szeredi fid = v9fs_create(v9ses, dir, dentry, NULL, perm, 818e43ae79cSMiklos Szeredi v9fs_uflags2omode(flags, 819e43ae79cSMiklos Szeredi v9fs_proto_dotu(v9ses))); 820e43ae79cSMiklos Szeredi if (IS_ERR(fid)) { 821e43ae79cSMiklos Szeredi err = PTR_ERR(fid); 822e43ae79cSMiklos Szeredi fid = NULL; 823e43ae79cSMiklos Szeredi goto error; 824e43ae79cSMiklos Szeredi } 825e43ae79cSMiklos Szeredi 826e43ae79cSMiklos Szeredi v9fs_invalidate_inode_attr(dir); 8272b0143b5SDavid Howells v9inode = V9FS_I(d_inode(dentry)); 828e43ae79cSMiklos Szeredi mutex_lock(&v9inode->v_mutex); 829fb89b45cSDominique Martinet if ((v9ses->cache == CACHE_LOOSE || v9ses->cache == CACHE_FSCACHE) && 830fb89b45cSDominique Martinet !v9inode->writeback_fid && 831e43ae79cSMiklos Szeredi ((flags & O_ACCMODE) != O_RDONLY)) { 832e43ae79cSMiklos Szeredi /* 833e43ae79cSMiklos Szeredi * clone a fid and add it to writeback_fid 834e43ae79cSMiklos Szeredi * we do it during open time instead of 835e43ae79cSMiklos Szeredi * page dirty time via write_begin/page_mkwrite 836e43ae79cSMiklos Szeredi * because we want write after unlink usecase 837e43ae79cSMiklos Szeredi * to work. 838e43ae79cSMiklos Szeredi */ 839e43ae79cSMiklos Szeredi inode_fid = v9fs_writeback_fid(dentry); 840e43ae79cSMiklos Szeredi if (IS_ERR(inode_fid)) { 841e43ae79cSMiklos Szeredi err = PTR_ERR(inode_fid); 842e43ae79cSMiklos Szeredi mutex_unlock(&v9inode->v_mutex); 843e43ae79cSMiklos Szeredi goto error; 844e43ae79cSMiklos Szeredi } 845e43ae79cSMiklos Szeredi v9inode->writeback_fid = (void *) inode_fid; 846e43ae79cSMiklos Szeredi } 847e43ae79cSMiklos Szeredi mutex_unlock(&v9inode->v_mutex); 848be12af3eSAl Viro err = finish_open(file, dentry, generic_file_open); 84930d90494SAl Viro if (err) 850e43ae79cSMiklos Szeredi goto error; 851e43ae79cSMiklos Szeredi 85230d90494SAl Viro file->private_data = fid; 853fb89b45cSDominique Martinet if (v9ses->cache == CACHE_LOOSE || v9ses->cache == CACHE_FSCACHE) 8542b0143b5SDavid Howells v9fs_cache_inode_set_cookie(d_inode(dentry), file); 855e43ae79cSMiklos Szeredi 85673a09dd9SAl Viro file->f_mode |= FMODE_CREATED; 857e43ae79cSMiklos Szeredi out: 858e43ae79cSMiklos Szeredi dput(res); 859d9585277SAl Viro return err; 860e43ae79cSMiklos Szeredi 861e43ae79cSMiklos Szeredi error: 862e43ae79cSMiklos Szeredi if (fid) 863e43ae79cSMiklos Szeredi p9_client_clunk(fid); 864e43ae79cSMiklos Szeredi goto out; 865e43ae79cSMiklos Szeredi } 866e43ae79cSMiklos Szeredi 8672bad8471SEric Van Hensbergen /** 8682bad8471SEric Van Hensbergen * v9fs_vfs_unlink - VFS unlink hook to delete an inode 8692bad8471SEric Van Hensbergen * @i: inode that is being unlinked 87073c592b9SEric Van Hensbergen * @d: dentry that is being unlinked 8712bad8471SEric Van Hensbergen * 8722bad8471SEric Van Hensbergen */ 8732bad8471SEric Van Hensbergen 87453c06f4eSAneesh Kumar K.V int v9fs_vfs_unlink(struct inode *i, struct dentry *d) 8752bad8471SEric Van Hensbergen { 8762bad8471SEric Van Hensbergen return v9fs_remove(i, d, 0); 8772bad8471SEric Van Hensbergen } 8782bad8471SEric Van Hensbergen 8792bad8471SEric Van Hensbergen /** 8802bad8471SEric Van Hensbergen * v9fs_vfs_rmdir - VFS unlink hook to delete a directory 8812bad8471SEric Van Hensbergen * @i: inode that is being unlinked 88273c592b9SEric Van Hensbergen * @d: dentry that is being unlinked 8832bad8471SEric Van Hensbergen * 8842bad8471SEric Van Hensbergen */ 8852bad8471SEric Van Hensbergen 88653c06f4eSAneesh Kumar K.V int v9fs_vfs_rmdir(struct inode *i, struct dentry *d) 8872bad8471SEric Van Hensbergen { 88848e370ffSAneesh Kumar K.V return v9fs_remove(i, d, AT_REMOVEDIR); 8892bad8471SEric Van Hensbergen } 8902bad8471SEric Van Hensbergen 8912bad8471SEric Van Hensbergen /** 8922bad8471SEric Van Hensbergen * v9fs_vfs_rename - VFS hook to rename an inode 8932bad8471SEric Van Hensbergen * @old_dir: old dir inode 8942bad8471SEric Van Hensbergen * @old_dentry: old dentry 8952bad8471SEric Van Hensbergen * @new_dir: new dir inode 8962bad8471SEric Van Hensbergen * @new_dentry: new dentry 8972bad8471SEric Van Hensbergen * 8982bad8471SEric Van Hensbergen */ 8992bad8471SEric Van Hensbergen 90053c06f4eSAneesh Kumar K.V int 9012bad8471SEric Van Hensbergen v9fs_vfs_rename(struct inode *old_dir, struct dentry *old_dentry, 9021cd66c93SMiklos Szeredi struct inode *new_dir, struct dentry *new_dentry, 9031cd66c93SMiklos Szeredi unsigned int flags) 9042bad8471SEric Van Hensbergen { 905d28c61f0SAneesh Kumar K.V int retval; 906bd238fb4SLatchesar Ionkov struct inode *old_inode; 907b271ec47SAneesh Kumar K.V struct inode *new_inode; 908bd238fb4SLatchesar Ionkov struct v9fs_session_info *v9ses; 909bd238fb4SLatchesar Ionkov struct p9_fid *oldfid; 910bd238fb4SLatchesar Ionkov struct p9_fid *olddirfid; 911bd238fb4SLatchesar Ionkov struct p9_fid *newdirfid; 912bd238fb4SLatchesar Ionkov struct p9_wstat wstat; 9132bad8471SEric Van Hensbergen 9141cd66c93SMiklos Szeredi if (flags) 9151cd66c93SMiklos Szeredi return -EINVAL; 9161cd66c93SMiklos Szeredi 9175d385153SJoe Perches p9_debug(P9_DEBUG_VFS, "\n"); 918bd238fb4SLatchesar Ionkov retval = 0; 9192b0143b5SDavid Howells old_inode = d_inode(old_dentry); 9202b0143b5SDavid Howells new_inode = d_inode(new_dentry); 921bd238fb4SLatchesar Ionkov v9ses = v9fs_inode2v9ses(old_inode); 922bd238fb4SLatchesar Ionkov oldfid = v9fs_fid_lookup(old_dentry); 923da977b2cSEric Van Hensbergen if (IS_ERR(oldfid)) 924da977b2cSEric Van Hensbergen return PTR_ERR(oldfid); 925da977b2cSEric Van Hensbergen 926797fc16dSAl Viro olddirfid = clone_fid(v9fs_parent_fid(old_dentry)); 927da977b2cSEric Van Hensbergen if (IS_ERR(olddirfid)) { 928da977b2cSEric Van Hensbergen retval = PTR_ERR(olddirfid); 929bd238fb4SLatchesar Ionkov goto done; 930da977b2cSEric Van Hensbergen } 931da977b2cSEric Van Hensbergen 932797fc16dSAl Viro newdirfid = clone_fid(v9fs_parent_fid(new_dentry)); 933da977b2cSEric Van Hensbergen if (IS_ERR(newdirfid)) { 934da977b2cSEric Van Hensbergen retval = PTR_ERR(newdirfid); 935bd238fb4SLatchesar Ionkov goto clunk_olddir; 9362bad8471SEric Van Hensbergen } 9372bad8471SEric Van Hensbergen 938a534c8d1SAneesh Kumar K.V down_write(&v9ses->rename_sem); 9394681dbdaSSripathi Kodi if (v9fs_proto_dotl(v9ses)) { 9409e8fb38eSAneesh Kumar K.V retval = p9_client_renameat(olddirfid, old_dentry->d_name.name, 9419e8fb38eSAneesh Kumar K.V newdirfid, new_dentry->d_name.name); 9429e8fb38eSAneesh Kumar K.V if (retval == -EOPNOTSUPP) 9434681dbdaSSripathi Kodi retval = p9_client_rename(oldfid, newdirfid, 9449e8fb38eSAneesh Kumar K.V new_dentry->d_name.name); 9459e8fb38eSAneesh Kumar K.V if (retval != -EOPNOTSUPP) 9464681dbdaSSripathi Kodi goto clunk_newdir; 9474681dbdaSSripathi Kodi } 948a534c8d1SAneesh Kumar K.V if (old_dentry->d_parent != new_dentry->d_parent) { 949a534c8d1SAneesh Kumar K.V /* 950a534c8d1SAneesh Kumar K.V * 9P .u can only handle file rename in the same directory 951a534c8d1SAneesh Kumar K.V */ 9524681dbdaSSripathi Kodi 9535d385153SJoe Perches p9_debug(P9_DEBUG_ERROR, "old dir and new dir are different\n"); 954621997cdSEric Van Hensbergen retval = -EXDEV; 955bd238fb4SLatchesar Ionkov goto clunk_newdir; 9562bad8471SEric Van Hensbergen } 957531b1094SLatchesar Ionkov v9fs_blank_wstat(&wstat); 958ba17674fSLatchesar Ionkov wstat.muid = v9ses->uname; 9597880b43bSAl Viro wstat.name = new_dentry->d_name.name; 960bd238fb4SLatchesar Ionkov retval = p9_client_wstat(oldfid, &wstat); 9612bad8471SEric Van Hensbergen 962bd238fb4SLatchesar Ionkov clunk_newdir: 963b271ec47SAneesh Kumar K.V if (!retval) { 964b271ec47SAneesh Kumar K.V if (new_inode) { 965b271ec47SAneesh Kumar K.V if (S_ISDIR(new_inode->i_mode)) 966b271ec47SAneesh Kumar K.V clear_nlink(new_inode); 967b271ec47SAneesh Kumar K.V else 968ac89b2efSEryu Guan v9fs_dec_count(new_inode); 969b271ec47SAneesh Kumar K.V } 970b271ec47SAneesh Kumar K.V if (S_ISDIR(old_inode->i_mode)) { 971b271ec47SAneesh Kumar K.V if (!new_inode) 972b271ec47SAneesh Kumar K.V inc_nlink(new_dir); 973ac89b2efSEryu Guan v9fs_dec_count(old_dir); 974b271ec47SAneesh Kumar K.V } 9753bc86de3SAneesh Kumar K.V v9fs_invalidate_inode_attr(old_inode); 976d28c61f0SAneesh Kumar K.V v9fs_invalidate_inode_attr(old_dir); 977d28c61f0SAneesh Kumar K.V v9fs_invalidate_inode_attr(new_dir); 9783bc86de3SAneesh Kumar K.V 979a534c8d1SAneesh Kumar K.V /* successful rename */ 980a534c8d1SAneesh Kumar K.V d_move(old_dentry, new_dentry); 981b271ec47SAneesh Kumar K.V } 982a534c8d1SAneesh Kumar K.V up_write(&v9ses->rename_sem); 98322150c4fSLatchesar Ionkov p9_client_clunk(newdirfid); 9842bad8471SEric Van Hensbergen 985bd238fb4SLatchesar Ionkov clunk_olddir: 98622150c4fSLatchesar Ionkov p9_client_clunk(olddirfid); 9872bad8471SEric Van Hensbergen 988bd238fb4SLatchesar Ionkov done: 9892bad8471SEric Van Hensbergen return retval; 9902bad8471SEric Van Hensbergen } 9912bad8471SEric Van Hensbergen 9922bad8471SEric Van Hensbergen /** 993943ffb58SAdrian Bunk * v9fs_vfs_getattr - retrieve file metadata 994a528d35eSDavid Howells * @path: Object to query 995ee443996SEric Van Hensbergen * @stat: metadata structure to populate 996a528d35eSDavid Howells * @request_mask: Mask of STATX_xxx flags indicating the caller's interests 997a528d35eSDavid Howells * @flags: AT_STATX_xxx setting 9982bad8471SEric Van Hensbergen * 9992bad8471SEric Van Hensbergen */ 10002bad8471SEric Van Hensbergen 10012bad8471SEric Van Hensbergen static int 1002a528d35eSDavid Howells v9fs_vfs_getattr(const struct path *path, struct kstat *stat, 1003a528d35eSDavid Howells u32 request_mask, unsigned int flags) 10042bad8471SEric Van Hensbergen { 1005a528d35eSDavid Howells struct dentry *dentry = path->dentry; 1006bd238fb4SLatchesar Ionkov struct v9fs_session_info *v9ses; 1007bd238fb4SLatchesar Ionkov struct p9_fid *fid; 100851a87c55SEric Van Hensbergen struct p9_wstat *st; 10092bad8471SEric Van Hensbergen 10105d385153SJoe Perches p9_debug(P9_DEBUG_VFS, "dentry: %p\n", dentry); 101142869c8aSAneesh Kumar K.V v9ses = v9fs_dentry2v9ses(dentry); 1012a1211908SAneesh Kumar K.V if (v9ses->cache == CACHE_LOOSE || v9ses->cache == CACHE_FSCACHE) { 10132b0143b5SDavid Howells generic_fillattr(d_inode(dentry), stat); 1014a1211908SAneesh Kumar K.V return 0; 1015a1211908SAneesh Kumar K.V } 1016bd238fb4SLatchesar Ionkov fid = v9fs_fid_lookup(dentry); 1017da977b2cSEric Van Hensbergen if (IS_ERR(fid)) 1018da977b2cSEric Van Hensbergen return PTR_ERR(fid); 10192bad8471SEric Van Hensbergen 1020bd238fb4SLatchesar Ionkov st = p9_client_stat(fid); 1021bd238fb4SLatchesar Ionkov if (IS_ERR(st)) 1022bd238fb4SLatchesar Ionkov return PTR_ERR(st); 10232bad8471SEric Van Hensbergen 10245e3cc1eeSHou Tao v9fs_stat2inode(st, d_inode(dentry), dentry->d_sb, 0); 10252b0143b5SDavid Howells generic_fillattr(d_inode(dentry), stat); 10262bad8471SEric Van Hensbergen 102762b2be59SLatchesar Ionkov p9stat_free(st); 1028bd238fb4SLatchesar Ionkov kfree(st); 1029bd238fb4SLatchesar Ionkov return 0; 10302bad8471SEric Van Hensbergen } 10312bad8471SEric Van Hensbergen 10322bad8471SEric Van Hensbergen /** 10332bad8471SEric Van Hensbergen * v9fs_vfs_setattr - set file metadata 10342bad8471SEric Van Hensbergen * @dentry: file whose metadata to set 10352bad8471SEric Van Hensbergen * @iattr: metadata assignment structure 10362bad8471SEric Van Hensbergen * 10372bad8471SEric Van Hensbergen */ 10382bad8471SEric Van Hensbergen 10392bad8471SEric Van Hensbergen static int v9fs_vfs_setattr(struct dentry *dentry, struct iattr *iattr) 10402bad8471SEric Van Hensbergen { 1041bd238fb4SLatchesar Ionkov int retval; 1042bd238fb4SLatchesar Ionkov struct v9fs_session_info *v9ses; 104366246641SJianyong Wu struct p9_fid *fid = NULL; 1044bd238fb4SLatchesar Ionkov struct p9_wstat wstat; 10452bad8471SEric Van Hensbergen 10465d385153SJoe Perches p9_debug(P9_DEBUG_VFS, "\n"); 104731051c85SJan Kara retval = setattr_prepare(dentry, iattr); 1048059c138bSAneesh Kumar K.V if (retval) 1049059c138bSAneesh Kumar K.V return retval; 1050059c138bSAneesh Kumar K.V 1051bd238fb4SLatchesar Ionkov retval = -EPERM; 105242869c8aSAneesh Kumar K.V v9ses = v9fs_dentry2v9ses(dentry); 105366246641SJianyong Wu if (iattr->ia_valid & ATTR_FILE) { 105466246641SJianyong Wu fid = iattr->ia_file->private_data; 105566246641SJianyong Wu WARN_ON(!fid); 105666246641SJianyong Wu } 105766246641SJianyong Wu if (!fid) 1058bd238fb4SLatchesar Ionkov fid = v9fs_fid_lookup(dentry); 1059da977b2cSEric Van Hensbergen if(IS_ERR(fid)) 1060da977b2cSEric Van Hensbergen return PTR_ERR(fid); 10612bad8471SEric Van Hensbergen 1062531b1094SLatchesar Ionkov v9fs_blank_wstat(&wstat); 10632bad8471SEric Van Hensbergen if (iattr->ia_valid & ATTR_MODE) 1064531b1094SLatchesar Ionkov wstat.mode = unixmode2p9mode(v9ses, iattr->ia_mode); 10652bad8471SEric Van Hensbergen 10662bad8471SEric Van Hensbergen if (iattr->ia_valid & ATTR_MTIME) 1067531b1094SLatchesar Ionkov wstat.mtime = iattr->ia_mtime.tv_sec; 10682bad8471SEric Van Hensbergen 10692bad8471SEric Van Hensbergen if (iattr->ia_valid & ATTR_ATIME) 1070531b1094SLatchesar Ionkov wstat.atime = iattr->ia_atime.tv_sec; 10712bad8471SEric Van Hensbergen 10722bad8471SEric Van Hensbergen if (iattr->ia_valid & ATTR_SIZE) 1073531b1094SLatchesar Ionkov wstat.length = iattr->ia_size; 10742bad8471SEric Van Hensbergen 1075dd6102fbSSripathi Kodi if (v9fs_proto_dotu(v9ses)) { 1076531b1094SLatchesar Ionkov if (iattr->ia_valid & ATTR_UID) 1077531b1094SLatchesar Ionkov wstat.n_uid = iattr->ia_uid; 10782bad8471SEric Van Hensbergen 1079531b1094SLatchesar Ionkov if (iattr->ia_valid & ATTR_GID) 1080531b1094SLatchesar Ionkov wstat.n_gid = iattr->ia_gid; 10812bad8471SEric Van Hensbergen } 1082059c138bSAneesh Kumar K.V 10833dc5436aSAneesh Kumar K.V /* Write all dirty data */ 1084e36cb0b8SDavid Howells if (d_is_reg(dentry)) 10852b0143b5SDavid Howells filemap_write_and_wait(d_inode(dentry)->i_mapping); 10863dc5436aSAneesh Kumar K.V 1087f10fc50fSAneesh Kumar K.V retval = p9_client_wstat(fid, &wstat); 1088f10fc50fSAneesh Kumar K.V if (retval < 0) 1089f10fc50fSAneesh Kumar K.V return retval; 1090059c138bSAneesh Kumar K.V 1091059c138bSAneesh Kumar K.V if ((iattr->ia_valid & ATTR_SIZE) && 10922b0143b5SDavid Howells iattr->ia_size != i_size_read(d_inode(dentry))) 10932b0143b5SDavid Howells truncate_setsize(d_inode(dentry), iattr->ia_size); 1094059c138bSAneesh Kumar K.V 10952b0143b5SDavid Howells v9fs_invalidate_inode_attr(d_inode(dentry)); 10961025774cSChristoph Hellwig 10972b0143b5SDavid Howells setattr_copy(d_inode(dentry), iattr); 10982b0143b5SDavid Howells mark_inode_dirty(d_inode(dentry)); 10991025774cSChristoph Hellwig return 0; 11002bad8471SEric Van Hensbergen } 11012bad8471SEric Van Hensbergen 11022bad8471SEric Van Hensbergen /** 1103531b1094SLatchesar Ionkov * v9fs_stat2inode - populate an inode structure with mistat info 1104531b1094SLatchesar Ionkov * @stat: Plan 9 metadata (mistat) structure 11052bad8471SEric Van Hensbergen * @inode: inode to populate 11062bad8471SEric Van Hensbergen * @sb: superblock of filesystem 11075e3cc1eeSHou Tao * @flags: control flags (e.g. V9FS_STAT2INODE_KEEP_ISIZE) 11082bad8471SEric Van Hensbergen * 11092bad8471SEric Van Hensbergen */ 11102bad8471SEric Van Hensbergen 11112bad8471SEric Van Hensbergen void 111251a87c55SEric Van Hensbergen v9fs_stat2inode(struct p9_wstat *stat, struct inode *inode, 11135e3cc1eeSHou Tao struct super_block *sb, unsigned int flags) 11142bad8471SEric Van Hensbergen { 11153eda0de6SAl Viro umode_t mode; 1116531b1094SLatchesar Ionkov char ext[32]; 11175717144aSAneesh Kumar K.V char tag_name[14]; 11185717144aSAneesh Kumar K.V unsigned int i_nlink; 11192bad8471SEric Van Hensbergen struct v9fs_session_info *v9ses = sb->s_fs_info; 1120b3cbea03SAneesh Kumar K.V struct v9fs_inode *v9inode = V9FS_I(inode); 11212bad8471SEric Van Hensbergen 1122bfe86848SMiklos Szeredi set_nlink(inode, 1); 11232bad8471SEric Van Hensbergen 1124531b1094SLatchesar Ionkov inode->i_atime.tv_sec = stat->atime; 1125531b1094SLatchesar Ionkov inode->i_mtime.tv_sec = stat->mtime; 1126531b1094SLatchesar Ionkov inode->i_ctime.tv_sec = stat->mtime; 11272bad8471SEric Van Hensbergen 1128bd32b82dSLatchesar Ionkov inode->i_uid = v9ses->dfltuid; 1129bd32b82dSLatchesar Ionkov inode->i_gid = v9ses->dfltgid; 11302bad8471SEric Van Hensbergen 1131dd6102fbSSripathi Kodi if (v9fs_proto_dotu(v9ses)) { 1132531b1094SLatchesar Ionkov inode->i_uid = stat->n_uid; 1133531b1094SLatchesar Ionkov inode->i_gid = stat->n_gid; 1134531b1094SLatchesar Ionkov } 11355717144aSAneesh Kumar K.V if ((S_ISREG(inode->i_mode)) || (S_ISDIR(inode->i_mode))) { 11365717144aSAneesh Kumar K.V if (v9fs_proto_dotu(v9ses) && (stat->extension[0] != '\0')) { 11375717144aSAneesh Kumar K.V /* 11385717144aSAneesh Kumar K.V * Hadlink support got added later to 11395717144aSAneesh Kumar K.V * to the .u extension. So there can be 11405717144aSAneesh Kumar K.V * server out there that doesn't support 11415717144aSAneesh Kumar K.V * this even with .u extension. So check 11425717144aSAneesh Kumar K.V * for non NULL stat->extension 11435717144aSAneesh Kumar K.V */ 1144b3f8ab4bSChen Gang strlcpy(ext, stat->extension, sizeof(ext)); 11455717144aSAneesh Kumar K.V /* HARDLINKCOUNT %u */ 11465717144aSAneesh Kumar K.V sscanf(ext, "%13s %u", tag_name, &i_nlink); 11475717144aSAneesh Kumar K.V if (!strncmp(tag_name, "HARDLINKCOUNT", 13)) 1148bfe86848SMiklos Szeredi set_nlink(inode, i_nlink); 11495717144aSAneesh Kumar K.V } 11505717144aSAneesh Kumar K.V } 1151df345c67SAneesh Kumar K.V mode = p9mode2perm(v9ses, stat); 115245089142SAneesh Kumar K.V mode |= inode->i_mode & ~S_IALLUGO; 115345089142SAneesh Kumar K.V inode->i_mode = mode; 11542bad8471SEric Van Hensbergen 11555e3cc1eeSHou Tao if (!(flags & V9FS_STAT2INODE_KEEP_ISIZE)) 11565e3cc1eeSHou Tao v9fs_i_size_write(inode, stat->length); 1157bd238fb4SLatchesar Ionkov /* not real number of blocks, but 512 byte ones ... */ 11585e3cc1eeSHou Tao inode->i_blocks = (stat->length + 512 - 1) >> 9; 1159b3cbea03SAneesh Kumar K.V v9inode->cache_validity &= ~V9FS_INO_INVALID_ATTR; 11602bad8471SEric Van Hensbergen } 11612bad8471SEric Van Hensbergen 11622bad8471SEric Van Hensbergen /** 11632bad8471SEric Van Hensbergen * v9fs_qid2ino - convert qid into inode number 11642bad8471SEric Van Hensbergen * @qid: qid to hash 11652bad8471SEric Van Hensbergen * 11662bad8471SEric Van Hensbergen * BUG: potential for inode number collisions? 11672bad8471SEric Van Hensbergen */ 11682bad8471SEric Van Hensbergen 1169bd238fb4SLatchesar Ionkov ino_t v9fs_qid2ino(struct p9_qid *qid) 11702bad8471SEric Van Hensbergen { 11712bad8471SEric Van Hensbergen u64 path = qid->path + 2; 11722bad8471SEric Van Hensbergen ino_t i = 0; 11732bad8471SEric Van Hensbergen 11742bad8471SEric Van Hensbergen if (sizeof(ino_t) == sizeof(path)) 11752bad8471SEric Van Hensbergen memcpy(&i, &path, sizeof(ino_t)); 11762bad8471SEric Van Hensbergen else 11772bad8471SEric Van Hensbergen i = (ino_t) (path ^ (path >> 32)); 11782bad8471SEric Van Hensbergen 11792bad8471SEric Van Hensbergen return i; 11802bad8471SEric Van Hensbergen } 11812bad8471SEric Van Hensbergen 11822bad8471SEric Van Hensbergen /** 11836b255391SAl Viro * v9fs_vfs_get_link - follow a symlink path 11842bad8471SEric Van Hensbergen * @dentry: dentry for symlink 11856b255391SAl Viro * @inode: inode for symlink 1186fceef393SAl Viro * @done: delayed call for when we are done with the return value 11872bad8471SEric Van Hensbergen */ 11882bad8471SEric Van Hensbergen 11896b255391SAl Viro static const char *v9fs_vfs_get_link(struct dentry *dentry, 1190fceef393SAl Viro struct inode *inode, 1191fceef393SAl Viro struct delayed_call *done) 11922bad8471SEric Van Hensbergen { 11936b255391SAl Viro struct v9fs_session_info *v9ses; 11946b255391SAl Viro struct p9_fid *fid; 119590e4fc88SAl Viro struct p9_wstat *st; 1196680baacbSAl Viro char *res; 11972bad8471SEric Van Hensbergen 11986b255391SAl Viro if (!dentry) 11996b255391SAl Viro return ERR_PTR(-ECHILD); 12006b255391SAl Viro 12016b255391SAl Viro v9ses = v9fs_dentry2v9ses(dentry); 12026b255391SAl Viro fid = v9fs_fid_lookup(dentry); 12034b8e9923SAl Viro p9_debug(P9_DEBUG_VFS, "%pd\n", dentry); 12042bad8471SEric Van Hensbergen 120590e4fc88SAl Viro if (IS_ERR(fid)) 120690e4fc88SAl Viro return ERR_CAST(fid); 12072bad8471SEric Van Hensbergen 120890e4fc88SAl Viro if (!v9fs_proto_dotu(v9ses)) 120990e4fc88SAl Viro return ERR_PTR(-EBADF); 121090e4fc88SAl Viro 121190e4fc88SAl Viro st = p9_client_stat(fid); 121290e4fc88SAl Viro if (IS_ERR(st)) 121390e4fc88SAl Viro return ERR_CAST(st); 121490e4fc88SAl Viro 121590e4fc88SAl Viro if (!(st->mode & P9_DMSYMLINK)) { 121690e4fc88SAl Viro p9stat_free(st); 121790e4fc88SAl Viro kfree(st); 121890e4fc88SAl Viro return ERR_PTR(-EINVAL); 12192bad8471SEric Van Hensbergen } 1220680baacbSAl Viro res = st->extension; 122190e4fc88SAl Viro st->extension = NULL; 1222680baacbSAl Viro if (strlen(res) >= PATH_MAX) 1223680baacbSAl Viro res[PATH_MAX - 1] = '\0'; 1224680baacbSAl Viro 122590e4fc88SAl Viro p9stat_free(st); 122690e4fc88SAl Viro kfree(st); 1227fceef393SAl Viro set_delayed_call(done, kfree_link, res); 1228fceef393SAl Viro return res; 12292bad8471SEric Van Hensbergen } 12302bad8471SEric Van Hensbergen 12312bad8471SEric Van Hensbergen /** 1232ee443996SEric Van Hensbergen * v9fs_vfs_mkspecial - create a special file 1233ee443996SEric Van Hensbergen * @dir: inode to create special file in 1234ee443996SEric Van Hensbergen * @dentry: dentry to create 1235fd2916bdSFabian Frederick * @perm: mode to create special file 1236ee443996SEric Van Hensbergen * @extension: 9p2000.u format extension string representing special file 1237ee443996SEric Van Hensbergen * 1238ee443996SEric Van Hensbergen */ 1239ee443996SEric Van Hensbergen 1240531b1094SLatchesar Ionkov static int v9fs_vfs_mkspecial(struct inode *dir, struct dentry *dentry, 1241c2837de7SAl Viro u32 perm, const char *extension) 1242531b1094SLatchesar Ionkov { 1243bd238fb4SLatchesar Ionkov struct p9_fid *fid; 1244d28c61f0SAneesh Kumar K.V struct v9fs_session_info *v9ses; 1245531b1094SLatchesar Ionkov 12466a3124a3SLatchesar Ionkov v9ses = v9fs_inode2v9ses(dir); 1247dd6102fbSSripathi Kodi if (!v9fs_proto_dotu(v9ses)) { 12485d385153SJoe Perches p9_debug(P9_DEBUG_ERROR, "not extended\n"); 12496a3124a3SLatchesar Ionkov return -EPERM; 1250531b1094SLatchesar Ionkov } 1251531b1094SLatchesar Ionkov 1252bd238fb4SLatchesar Ionkov fid = v9fs_create(v9ses, dir, dentry, (char *) extension, perm, 1253bd238fb4SLatchesar Ionkov P9_OREAD); 1254bd238fb4SLatchesar Ionkov if (IS_ERR(fid)) 1255bd238fb4SLatchesar Ionkov return PTR_ERR(fid); 1256da977b2cSEric Van Hensbergen 1257d28c61f0SAneesh Kumar K.V v9fs_invalidate_inode_attr(dir); 1258bd238fb4SLatchesar Ionkov p9_client_clunk(fid); 12596a3124a3SLatchesar Ionkov return 0; 1260531b1094SLatchesar Ionkov } 1261531b1094SLatchesar Ionkov 1262531b1094SLatchesar Ionkov /** 1263531b1094SLatchesar Ionkov * v9fs_vfs_symlink - helper function to create symlinks 1264531b1094SLatchesar Ionkov * @dir: directory inode containing symlink 1265531b1094SLatchesar Ionkov * @dentry: dentry for symlink 1266531b1094SLatchesar Ionkov * @symname: symlink data 1267531b1094SLatchesar Ionkov * 1268ee443996SEric Van Hensbergen * See Also: 9P2000.u RFC for more information 1269531b1094SLatchesar Ionkov * 1270531b1094SLatchesar Ionkov */ 1271531b1094SLatchesar Ionkov 1272531b1094SLatchesar Ionkov static int 1273531b1094SLatchesar Ionkov v9fs_vfs_symlink(struct inode *dir, struct dentry *dentry, const char *symname) 1274531b1094SLatchesar Ionkov { 12754b8e9923SAl Viro p9_debug(P9_DEBUG_VFS, " %lu,%pd,%s\n", 12764b8e9923SAl Viro dir->i_ino, dentry, symname); 1277531b1094SLatchesar Ionkov 1278c2837de7SAl Viro return v9fs_vfs_mkspecial(dir, dentry, P9_DMSYMLINK, symname); 1279531b1094SLatchesar Ionkov } 1280531b1094SLatchesar Ionkov 1281b46c267eSAl Viro #define U32_MAX_DIGITS 10 1282b46c267eSAl Viro 12832bad8471SEric Van Hensbergen /** 12842bad8471SEric Van Hensbergen * v9fs_vfs_link - create a hardlink 12852bad8471SEric Van Hensbergen * @old_dentry: dentry for file to link to 12862bad8471SEric Van Hensbergen * @dir: inode destination for new link 128773c592b9SEric Van Hensbergen * @dentry: dentry for link 12882bad8471SEric Van Hensbergen * 12892bad8471SEric Van Hensbergen */ 12902bad8471SEric Van Hensbergen 12912bad8471SEric Van Hensbergen static int 12922bad8471SEric Van Hensbergen v9fs_vfs_link(struct dentry *old_dentry, struct inode *dir, 12932bad8471SEric Van Hensbergen struct dentry *dentry) 12942bad8471SEric Van Hensbergen { 1295531b1094SLatchesar Ionkov int retval; 1296b46c267eSAl Viro char name[1 + U32_MAX_DIGITS + 2]; /* sign + number + \n + \0 */ 1297d28c61f0SAneesh Kumar K.V struct p9_fid *oldfid; 12982bad8471SEric Van Hensbergen 12994b8e9923SAl Viro p9_debug(P9_DEBUG_VFS, " %lu,%pd,%pd\n", 13004b8e9923SAl Viro dir->i_ino, dentry, old_dentry); 13012bad8471SEric Van Hensbergen 1302da977b2cSEric Van Hensbergen oldfid = v9fs_fid_clone(old_dentry); 1303da977b2cSEric Van Hensbergen if (IS_ERR(oldfid)) 1304da977b2cSEric Van Hensbergen return PTR_ERR(oldfid); 13052bad8471SEric Van Hensbergen 130616cce6d2SLatchesar Ionkov sprintf(name, "%d\n", oldfid->fid); 1307bd238fb4SLatchesar Ionkov retval = v9fs_vfs_mkspecial(dir, dentry, P9_DMLINK, name); 1308c06c066aSAneesh Kumar K.V if (!retval) { 13092b0143b5SDavid Howells v9fs_refresh_inode(oldfid, d_inode(old_dentry)); 1310d28c61f0SAneesh Kumar K.V v9fs_invalidate_inode_attr(dir); 1311c06c066aSAneesh Kumar K.V } 1312bd238fb4SLatchesar Ionkov p9_client_clunk(oldfid); 13132bad8471SEric Van Hensbergen return retval; 13142bad8471SEric Van Hensbergen } 13152bad8471SEric Van Hensbergen 13162bad8471SEric Van Hensbergen /** 13172bad8471SEric Van Hensbergen * v9fs_vfs_mknod - create a special file 13182bad8471SEric Van Hensbergen * @dir: inode destination for new link 13192bad8471SEric Van Hensbergen * @dentry: dentry for file 13202bad8471SEric Van Hensbergen * @mode: mode for creation 1321ee443996SEric Van Hensbergen * @rdev: device associated with special file 13222bad8471SEric Van Hensbergen * 13232bad8471SEric Van Hensbergen */ 13242bad8471SEric Van Hensbergen 13252bad8471SEric Van Hensbergen static int 13261a67aafbSAl Viro v9fs_vfs_mknod(struct inode *dir, struct dentry *dentry, umode_t mode, dev_t rdev) 13272bad8471SEric Van Hensbergen { 1328c2837de7SAl Viro struct v9fs_session_info *v9ses = v9fs_inode2v9ses(dir); 1329531b1094SLatchesar Ionkov int retval; 1330b46c267eSAl Viro char name[2 + U32_MAX_DIGITS + 1 + U32_MAX_DIGITS + 1]; 1331c2837de7SAl Viro u32 perm; 13322bad8471SEric Van Hensbergen 13334b8e9923SAl Viro p9_debug(P9_DEBUG_VFS, " %lu,%pd mode: %hx MAJOR: %u MINOR: %u\n", 13344b8e9923SAl Viro dir->i_ino, dentry, mode, 13355d385153SJoe Perches MAJOR(rdev), MINOR(rdev)); 13362bad8471SEric Van Hensbergen 13372bad8471SEric Van Hensbergen /* build extension */ 13382bad8471SEric Van Hensbergen if (S_ISBLK(mode)) 1339531b1094SLatchesar Ionkov sprintf(name, "b %u %u", MAJOR(rdev), MINOR(rdev)); 13402bad8471SEric Van Hensbergen else if (S_ISCHR(mode)) 1341531b1094SLatchesar Ionkov sprintf(name, "c %u %u", MAJOR(rdev), MINOR(rdev)); 1342b46c267eSAl Viro else 1343531b1094SLatchesar Ionkov *name = 0; 13442bad8471SEric Van Hensbergen 1345c2837de7SAl Viro perm = unixmode2p9mode(v9ses, mode); 1346c2837de7SAl Viro retval = v9fs_vfs_mkspecial(dir, dentry, perm, name); 13472bad8471SEric Van Hensbergen 13482bad8471SEric Van Hensbergen return retval; 13492bad8471SEric Van Hensbergen } 13502bad8471SEric Van Hensbergen 1351b3cbea03SAneesh Kumar K.V int v9fs_refresh_inode(struct p9_fid *fid, struct inode *inode) 1352b3cbea03SAneesh Kumar K.V { 135345089142SAneesh Kumar K.V int umode; 135445089142SAneesh Kumar K.V dev_t rdev; 1355b3cbea03SAneesh Kumar K.V struct p9_wstat *st; 1356b3cbea03SAneesh Kumar K.V struct v9fs_session_info *v9ses; 13575e3cc1eeSHou Tao unsigned int flags; 1358b3cbea03SAneesh Kumar K.V 1359b3cbea03SAneesh Kumar K.V v9ses = v9fs_inode2v9ses(inode); 1360b3cbea03SAneesh Kumar K.V st = p9_client_stat(fid); 1361b3cbea03SAneesh Kumar K.V if (IS_ERR(st)) 1362b3cbea03SAneesh Kumar K.V return PTR_ERR(st); 136345089142SAneesh Kumar K.V /* 136445089142SAneesh Kumar K.V * Don't update inode if the file type is different 136545089142SAneesh Kumar K.V */ 136645089142SAneesh Kumar K.V umode = p9mode2unixmode(v9ses, st, &rdev); 136745089142SAneesh Kumar K.V if ((inode->i_mode & S_IFMT) != (umode & S_IFMT)) 136845089142SAneesh Kumar K.V goto out; 1369b3cbea03SAneesh Kumar K.V 1370b3cbea03SAneesh Kumar K.V /* 1371b3cbea03SAneesh Kumar K.V * We don't want to refresh inode->i_size, 1372b3cbea03SAneesh Kumar K.V * because we may have cached data 1373b3cbea03SAneesh Kumar K.V */ 13745e3cc1eeSHou Tao flags = (v9ses->cache == CACHE_LOOSE || v9ses->cache == CACHE_FSCACHE) ? 13755e3cc1eeSHou Tao V9FS_STAT2INODE_KEEP_ISIZE : 0; 13765e3cc1eeSHou Tao v9fs_stat2inode(st, inode, inode->i_sb, flags); 137745089142SAneesh Kumar K.V out: 1378b3cbea03SAneesh Kumar K.V p9stat_free(st); 1379b3cbea03SAneesh Kumar K.V kfree(st); 1380b3cbea03SAneesh Kumar K.V return 0; 1381b3cbea03SAneesh Kumar K.V } 1382b3cbea03SAneesh Kumar K.V 13839b6533c9SSripathi Kodi static const struct inode_operations v9fs_dir_inode_operations_dotu = { 13849b6533c9SSripathi Kodi .create = v9fs_vfs_create, 13859b6533c9SSripathi Kodi .lookup = v9fs_vfs_lookup, 1386e43ae79cSMiklos Szeredi .atomic_open = v9fs_vfs_atomic_open, 13879b6533c9SSripathi Kodi .symlink = v9fs_vfs_symlink, 138850cc42ffSVenkateswararao Jujjuri (JV) .link = v9fs_vfs_link, 13899b6533c9SSripathi Kodi .unlink = v9fs_vfs_unlink, 13909b6533c9SSripathi Kodi .mkdir = v9fs_vfs_mkdir, 13919b6533c9SSripathi Kodi .rmdir = v9fs_vfs_rmdir, 13921d76e313SAneesh Kumar K.V .mknod = v9fs_vfs_mknod, 13939b6533c9SSripathi Kodi .rename = v9fs_vfs_rename, 13949b6533c9SSripathi Kodi .getattr = v9fs_vfs_getattr, 13959b6533c9SSripathi Kodi .setattr = v9fs_vfs_setattr, 13969b6533c9SSripathi Kodi }; 13979b6533c9SSripathi Kodi 1398754661f1SArjan van de Ven static const struct inode_operations v9fs_dir_inode_operations = { 1399b501611aSEric Van Hensbergen .create = v9fs_vfs_create, 1400b501611aSEric Van Hensbergen .lookup = v9fs_vfs_lookup, 1401e43ae79cSMiklos Szeredi .atomic_open = v9fs_vfs_atomic_open, 1402b501611aSEric Van Hensbergen .unlink = v9fs_vfs_unlink, 1403b501611aSEric Van Hensbergen .mkdir = v9fs_vfs_mkdir, 1404b501611aSEric Van Hensbergen .rmdir = v9fs_vfs_rmdir, 1405b501611aSEric Van Hensbergen .mknod = v9fs_vfs_mknod, 1406b501611aSEric Van Hensbergen .rename = v9fs_vfs_rename, 1407b501611aSEric Van Hensbergen .getattr = v9fs_vfs_getattr, 1408b501611aSEric Van Hensbergen .setattr = v9fs_vfs_setattr, 1409b501611aSEric Van Hensbergen }; 1410b501611aSEric Van Hensbergen 1411754661f1SArjan van de Ven static const struct inode_operations v9fs_file_inode_operations = { 14122bad8471SEric Van Hensbergen .getattr = v9fs_vfs_getattr, 14132bad8471SEric Van Hensbergen .setattr = v9fs_vfs_setattr, 14142bad8471SEric Van Hensbergen }; 14152bad8471SEric Van Hensbergen 1416754661f1SArjan van de Ven static const struct inode_operations v9fs_symlink_inode_operations = { 14176b255391SAl Viro .get_link = v9fs_vfs_get_link, 14182bad8471SEric Van Hensbergen .getattr = v9fs_vfs_getattr, 14192bad8471SEric Van Hensbergen .setattr = v9fs_vfs_setattr, 14202bad8471SEric Van Hensbergen }; 14219b6533c9SSripathi Kodi 1422