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 221*bc868036SDavid Howells * @sb: The superblock to allocate the inode from 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 241*bc868036SDavid Howells * @inode: The inode to be freed 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 25421cb47beSChristian Brauner inode_init_owner(&init_user_ns,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; 259987a6485SGreg Kurz inode->i_private = NULL; 2602bad8471SEric Van Hensbergen 2612bad8471SEric Van Hensbergen switch (mode & S_IFMT) { 2622bad8471SEric Van Hensbergen case S_IFIFO: 2632bad8471SEric Van Hensbergen case S_IFBLK: 2642bad8471SEric Van Hensbergen case S_IFCHR: 2652bad8471SEric Van Hensbergen case S_IFSOCK: 2664b43516aSM. Mohan Kumar if (v9fs_proto_dotl(v9ses)) { 2674b43516aSM. Mohan Kumar inode->i_op = &v9fs_file_inode_operations_dotl; 2684b43516aSM. Mohan Kumar } else if (v9fs_proto_dotu(v9ses)) { 2694b43516aSM. Mohan Kumar inode->i_op = &v9fs_file_inode_operations; 2704b43516aSM. Mohan Kumar } else { 2715d385153SJoe Perches p9_debug(P9_DEBUG_ERROR, 272bd238fb4SLatchesar Ionkov "special files without extended mode\n"); 2732bb54115SAbhishek Kulkarni err = -EINVAL; 2742bb54115SAbhishek Kulkarni goto error; 275b501611aSEric Van Hensbergen } 2762bb54115SAbhishek Kulkarni init_special_inode(inode, inode->i_mode, inode->i_rdev); 2775d58bec5SEric Van Hensbergen break; 2782bad8471SEric Van Hensbergen case S_IFREG: 2799b6533c9SSripathi Kodi if (v9fs_proto_dotl(v9ses)) { 2809b6533c9SSripathi Kodi inode->i_op = &v9fs_file_inode_operations_dotl; 281fb89b45cSDominique Martinet if (v9ses->cache == CACHE_LOOSE || 282fb89b45cSDominique Martinet v9ses->cache == CACHE_FSCACHE) 28329236f4eSAneesh Kumar K.V inode->i_fop = 28429236f4eSAneesh Kumar K.V &v9fs_cached_file_operations_dotl; 285fb89b45cSDominique Martinet else if (v9ses->cache == CACHE_MMAP) 286fb89b45cSDominique Martinet inode->i_fop = &v9fs_mmap_file_operations_dotl; 28729236f4eSAneesh Kumar K.V else 2889b6533c9SSripathi Kodi inode->i_fop = &v9fs_file_operations_dotl; 2899b6533c9SSripathi Kodi } else { 2902bad8471SEric Van Hensbergen inode->i_op = &v9fs_file_inode_operations; 291fb89b45cSDominique Martinet if (v9ses->cache == CACHE_LOOSE || 292fb89b45cSDominique Martinet v9ses->cache == CACHE_FSCACHE) 293fb89b45cSDominique Martinet inode->i_fop = 294fb89b45cSDominique Martinet &v9fs_cached_file_operations; 295fb89b45cSDominique Martinet else if (v9ses->cache == CACHE_MMAP) 296fb89b45cSDominique Martinet inode->i_fop = &v9fs_mmap_file_operations; 29729236f4eSAneesh Kumar K.V else 2982bad8471SEric Van Hensbergen inode->i_fop = &v9fs_file_operations; 2999b6533c9SSripathi Kodi } 3009b6533c9SSripathi Kodi 3012bad8471SEric Van Hensbergen break; 302b501611aSEric Van Hensbergen case S_IFLNK: 3039b6533c9SSripathi Kodi if (!v9fs_proto_dotu(v9ses) && !v9fs_proto_dotl(v9ses)) { 3045d385153SJoe Perches p9_debug(P9_DEBUG_ERROR, 3055d385153SJoe Perches "extended modes used with legacy protocol\n"); 3062bb54115SAbhishek Kulkarni err = -EINVAL; 3072bb54115SAbhishek Kulkarni goto error; 308b501611aSEric Van Hensbergen } 3099b6533c9SSripathi Kodi 3109b6533c9SSripathi Kodi if (v9fs_proto_dotl(v9ses)) 3119b6533c9SSripathi Kodi inode->i_op = &v9fs_symlink_inode_operations_dotl; 3129b6533c9SSripathi Kodi else 313b501611aSEric Van Hensbergen inode->i_op = &v9fs_symlink_inode_operations; 3149b6533c9SSripathi Kodi 315b501611aSEric Van Hensbergen break; 3162bad8471SEric Van Hensbergen case S_IFDIR: 317d8c76e6fSDave Hansen inc_nlink(inode); 3189b6533c9SSripathi Kodi if (v9fs_proto_dotl(v9ses)) 3199b6533c9SSripathi Kodi inode->i_op = &v9fs_dir_inode_operations_dotl; 3209b6533c9SSripathi Kodi else if (v9fs_proto_dotu(v9ses)) 3219b6533c9SSripathi Kodi inode->i_op = &v9fs_dir_inode_operations_dotu; 322b501611aSEric Van Hensbergen else 3232bad8471SEric Van Hensbergen inode->i_op = &v9fs_dir_inode_operations; 3249b6533c9SSripathi Kodi 3259b6533c9SSripathi Kodi if (v9fs_proto_dotl(v9ses)) 3269b6533c9SSripathi Kodi inode->i_fop = &v9fs_dir_operations_dotl; 3279b6533c9SSripathi Kodi else 3282bad8471SEric Van Hensbergen inode->i_fop = &v9fs_dir_operations; 3299b6533c9SSripathi Kodi 3302bad8471SEric Van Hensbergen break; 3312bad8471SEric Van Hensbergen default: 332609eac1cSLinus Torvalds p9_debug(P9_DEBUG_ERROR, "BAD mode 0x%hx S_IFMT 0x%x\n", 3332bad8471SEric Van Hensbergen mode, mode & S_IFMT); 3342bb54115SAbhishek Kulkarni err = -EINVAL; 3352bb54115SAbhishek Kulkarni goto error; 3362bad8471SEric Van Hensbergen } 3372bb54115SAbhishek Kulkarni error: 3385ffc0cb3SAneesh Kumar K.V return err; 3395ffc0cb3SAneesh Kumar K.V 3405ffc0cb3SAneesh Kumar K.V } 3415ffc0cb3SAneesh Kumar K.V 3425ffc0cb3SAneesh Kumar K.V /** 3435ffc0cb3SAneesh Kumar K.V * v9fs_get_inode - helper function to setup an inode 3445ffc0cb3SAneesh Kumar K.V * @sb: superblock 3455ffc0cb3SAneesh Kumar K.V * @mode: mode to setup inode with 346*bc868036SDavid Howells * @rdev: The device numbers to set 3475ffc0cb3SAneesh Kumar K.V */ 3485ffc0cb3SAneesh Kumar K.V 3493eda0de6SAl Viro struct inode *v9fs_get_inode(struct super_block *sb, umode_t mode, dev_t rdev) 3505ffc0cb3SAneesh Kumar K.V { 3515ffc0cb3SAneesh Kumar K.V int err; 3525ffc0cb3SAneesh Kumar K.V struct inode *inode; 3535ffc0cb3SAneesh Kumar K.V struct v9fs_session_info *v9ses = sb->s_fs_info; 3545ffc0cb3SAneesh Kumar K.V 355609eac1cSLinus Torvalds p9_debug(P9_DEBUG_VFS, "super block: %p mode: %ho\n", sb, mode); 3565ffc0cb3SAneesh Kumar K.V 3575ffc0cb3SAneesh Kumar K.V inode = new_inode(sb); 3585ffc0cb3SAneesh Kumar K.V if (!inode) { 3595d385153SJoe Perches pr_warn("%s (%d): Problem allocating inode\n", 3605d385153SJoe Perches __func__, task_pid_nr(current)); 3615ffc0cb3SAneesh Kumar K.V return ERR_PTR(-ENOMEM); 3625ffc0cb3SAneesh Kumar K.V } 36345089142SAneesh Kumar K.V err = v9fs_init_inode(v9ses, inode, mode, rdev); 3645ffc0cb3SAneesh Kumar K.V if (err) { 3652bb54115SAbhishek Kulkarni iput(inode); 3662bb54115SAbhishek Kulkarni return ERR_PTR(err); 3672bad8471SEric Van Hensbergen } 3685ffc0cb3SAneesh Kumar K.V return inode; 3695ffc0cb3SAneesh Kumar K.V } 3702bad8471SEric Van Hensbergen 37160e78d2cSAbhishek Kulkarni /** 372*bc868036SDavid Howells * v9fs_evict_inode - Remove an inode from the inode cache 37360e78d2cSAbhishek Kulkarni * @inode: inode to release 37460e78d2cSAbhishek Kulkarni * 37560e78d2cSAbhishek Kulkarni */ 376b57922d9SAl Viro void v9fs_evict_inode(struct inode *inode) 37760e78d2cSAbhishek Kulkarni { 3786b39f6d2SAneesh Kumar K.V struct v9fs_inode *v9inode = V9FS_I(inode); 3796b39f6d2SAneesh Kumar K.V 3804ad78628SAl Viro truncate_inode_pages_final(&inode->i_data); 381dbd5768fSJan Kara clear_inode(inode); 3824ad78628SAl Viro filemap_fdatawrite(&inode->i_data); 38360e78d2cSAbhishek Kulkarni 38460e78d2cSAbhishek Kulkarni v9fs_cache_inode_put_cookie(inode); 3856b39f6d2SAneesh Kumar K.V /* clunk the fid stashed in writeback_fid */ 3866b39f6d2SAneesh Kumar K.V if (v9inode->writeback_fid) { 3876b39f6d2SAneesh Kumar K.V p9_client_clunk(v9inode->writeback_fid); 3886b39f6d2SAneesh Kumar K.V v9inode->writeback_fid = NULL; 3893cf387d7SAneesh Kumar K.V } 39060e78d2cSAbhishek Kulkarni } 39160e78d2cSAbhishek Kulkarni 392fd2421f5SAneesh Kumar K.V static int v9fs_test_inode(struct inode *inode, void *data) 393fd2421f5SAneesh Kumar K.V { 394fd2421f5SAneesh Kumar K.V int umode; 39545089142SAneesh Kumar K.V dev_t rdev; 396fd2421f5SAneesh Kumar K.V struct v9fs_inode *v9inode = V9FS_I(inode); 397fd2421f5SAneesh Kumar K.V struct p9_wstat *st = (struct p9_wstat *)data; 398fd2421f5SAneesh Kumar K.V struct v9fs_session_info *v9ses = v9fs_inode2v9ses(inode); 399fd2421f5SAneesh Kumar K.V 40045089142SAneesh Kumar K.V umode = p9mode2unixmode(v9ses, st, &rdev); 401fd2421f5SAneesh Kumar K.V /* don't match inode of different type */ 4026e3e2c43SAl Viro if (inode_wrong_type(inode, umode)) 403fd2421f5SAneesh Kumar K.V return 0; 404fd2421f5SAneesh Kumar K.V 405fd2421f5SAneesh Kumar K.V /* compare qid details */ 406fd2421f5SAneesh Kumar K.V if (memcmp(&v9inode->qid.version, 407fd2421f5SAneesh Kumar K.V &st->qid.version, sizeof(v9inode->qid.version))) 408fd2421f5SAneesh Kumar K.V return 0; 409fd2421f5SAneesh Kumar K.V 410fd2421f5SAneesh Kumar K.V if (v9inode->qid.type != st->qid.type) 411fd2421f5SAneesh Kumar K.V return 0; 4128ee03163STuomas Tynkkynen 4138ee03163STuomas Tynkkynen if (v9inode->qid.path != st->qid.path) 4148ee03163STuomas Tynkkynen return 0; 415fd2421f5SAneesh Kumar K.V return 1; 416fd2421f5SAneesh Kumar K.V } 417fd2421f5SAneesh Kumar K.V 418ed80fcfaSAneesh Kumar K.V static int v9fs_test_new_inode(struct inode *inode, void *data) 419ed80fcfaSAneesh Kumar K.V { 420ed80fcfaSAneesh Kumar K.V return 0; 421ed80fcfaSAneesh Kumar K.V } 422ed80fcfaSAneesh Kumar K.V 423fd2421f5SAneesh Kumar K.V static int v9fs_set_inode(struct inode *inode, void *data) 424fd2421f5SAneesh Kumar K.V { 425fd2421f5SAneesh Kumar K.V struct v9fs_inode *v9inode = V9FS_I(inode); 426fd2421f5SAneesh Kumar K.V struct p9_wstat *st = (struct p9_wstat *)data; 427fd2421f5SAneesh Kumar K.V 428fd2421f5SAneesh Kumar K.V memcpy(&v9inode->qid, &st->qid, sizeof(st->qid)); 429fd2421f5SAneesh Kumar K.V return 0; 430fd2421f5SAneesh Kumar K.V } 431fd2421f5SAneesh Kumar K.V 4325ffc0cb3SAneesh Kumar K.V static struct inode *v9fs_qid_iget(struct super_block *sb, 4335ffc0cb3SAneesh Kumar K.V struct p9_qid *qid, 434ed80fcfaSAneesh Kumar K.V struct p9_wstat *st, 435ed80fcfaSAneesh Kumar K.V int new) 4365ffc0cb3SAneesh Kumar K.V { 43745089142SAneesh Kumar K.V dev_t rdev; 4383eda0de6SAl Viro int retval; 4393eda0de6SAl Viro umode_t 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; 443ed80fcfaSAneesh Kumar K.V int (*test)(struct inode *, void *); 444ed80fcfaSAneesh Kumar K.V 445ed80fcfaSAneesh Kumar K.V if (new) 446ed80fcfaSAneesh Kumar K.V test = v9fs_test_new_inode; 447ed80fcfaSAneesh Kumar K.V else 448ed80fcfaSAneesh Kumar K.V test = v9fs_test_inode; 4495ffc0cb3SAneesh Kumar K.V 4505ffc0cb3SAneesh Kumar K.V i_ino = v9fs_qid2ino(qid); 451ed80fcfaSAneesh Kumar K.V inode = iget5_locked(sb, i_ino, test, v9fs_set_inode, st); 4525ffc0cb3SAneesh Kumar K.V if (!inode) 4535ffc0cb3SAneesh Kumar K.V return ERR_PTR(-ENOMEM); 4545ffc0cb3SAneesh Kumar K.V if (!(inode->i_state & I_NEW)) 4555ffc0cb3SAneesh Kumar K.V return inode; 4565ffc0cb3SAneesh Kumar K.V /* 4575ffc0cb3SAneesh Kumar K.V * initialize the inode with the stat info 4585ffc0cb3SAneesh Kumar K.V * FIXME!! we may need support for stale inodes 4595ffc0cb3SAneesh Kumar K.V * later. 4605ffc0cb3SAneesh Kumar K.V */ 461fd2421f5SAneesh Kumar K.V inode->i_ino = i_ino; 46245089142SAneesh Kumar K.V umode = p9mode2unixmode(v9ses, st, &rdev); 46345089142SAneesh Kumar K.V retval = v9fs_init_inode(v9ses, inode, umode, rdev); 4645ffc0cb3SAneesh Kumar K.V if (retval) 4655ffc0cb3SAneesh Kumar K.V goto error; 4665ffc0cb3SAneesh Kumar K.V 4675e3cc1eeSHou Tao v9fs_stat2inode(st, inode, sb, 0); 4685ffc0cb3SAneesh Kumar K.V v9fs_cache_inode_get_cookie(inode); 4695ffc0cb3SAneesh Kumar K.V unlock_new_inode(inode); 4705ffc0cb3SAneesh Kumar K.V return inode; 4715ffc0cb3SAneesh Kumar K.V error: 4720a73d0a2SAl Viro iget_failed(inode); 4735ffc0cb3SAneesh Kumar K.V return ERR_PTR(retval); 4745ffc0cb3SAneesh Kumar K.V 4755ffc0cb3SAneesh Kumar K.V } 4765ffc0cb3SAneesh Kumar K.V 47753c06f4eSAneesh Kumar K.V struct inode * 478a78ce05dSAneesh Kumar K.V v9fs_inode_from_fid(struct v9fs_session_info *v9ses, struct p9_fid *fid, 479ed80fcfaSAneesh Kumar K.V struct super_block *sb, int new) 4806a3124a3SLatchesar Ionkov { 48151a87c55SEric Van Hensbergen struct p9_wstat *st; 4825ffc0cb3SAneesh Kumar K.V struct inode *inode = NULL; 4836a3124a3SLatchesar Ionkov 484bd238fb4SLatchesar Ionkov st = p9_client_stat(fid); 48502bc3567SAbhishek Kulkarni if (IS_ERR(st)) 48602bc3567SAbhishek Kulkarni return ERR_CAST(st); 4872bad8471SEric Van Hensbergen 488ed80fcfaSAneesh Kumar K.V inode = v9fs_qid_iget(sb, &st->qid, st, new); 48902bc3567SAbhishek Kulkarni p9stat_free(st); 490bd238fb4SLatchesar Ionkov kfree(st); 4915ffc0cb3SAneesh Kumar K.V return inode; 4922bad8471SEric Van Hensbergen } 4932bad8471SEric Van Hensbergen 4942bad8471SEric Van Hensbergen /** 495f88657ceSAneesh Kumar K.V * v9fs_at_to_dotl_flags- convert Linux specific AT flags to 496f88657ceSAneesh Kumar K.V * plan 9 AT flag. 497f88657ceSAneesh Kumar K.V * @flags: flags to convert 498f88657ceSAneesh Kumar K.V */ 499f88657ceSAneesh Kumar K.V static int v9fs_at_to_dotl_flags(int flags) 500f88657ceSAneesh Kumar K.V { 501f88657ceSAneesh Kumar K.V int rflags = 0; 502f88657ceSAneesh Kumar K.V if (flags & AT_REMOVEDIR) 503f88657ceSAneesh Kumar K.V rflags |= P9_DOTL_AT_REMOVEDIR; 504f88657ceSAneesh Kumar K.V return rflags; 505f88657ceSAneesh Kumar K.V } 506f88657ceSAneesh Kumar K.V 507f88657ceSAneesh Kumar K.V /** 508ac89b2efSEryu Guan * v9fs_dec_count - helper functon to drop i_nlink. 509ac89b2efSEryu Guan * 510ac89b2efSEryu Guan * If a directory had nlink <= 2 (including . and ..), then we should not drop 511ac89b2efSEryu Guan * the link count, which indicates the underlying exported fs doesn't maintain 512ac89b2efSEryu Guan * nlink accurately. e.g. 513ac89b2efSEryu Guan * - overlayfs sets nlink to 1 for merged dir 514ac89b2efSEryu Guan * - ext4 (with dir_nlink feature enabled) sets nlink to 1 if a dir has more 515ac89b2efSEryu Guan * than EXT4_LINK_MAX (65000) links. 516ac89b2efSEryu Guan * 517ac89b2efSEryu Guan * @inode: inode whose nlink is being dropped 518ac89b2efSEryu Guan */ 519ac89b2efSEryu Guan static void v9fs_dec_count(struct inode *inode) 520ac89b2efSEryu Guan { 521ac89b2efSEryu Guan if (!S_ISDIR(inode->i_mode) || inode->i_nlink > 2) 522ac89b2efSEryu Guan drop_nlink(inode); 523ac89b2efSEryu Guan } 524ac89b2efSEryu Guan 525ac89b2efSEryu Guan /** 5262bad8471SEric Van Hensbergen * v9fs_remove - helper function to remove files and directories 52773c592b9SEric Van Hensbergen * @dir: directory inode that is being deleted 52848e370ffSAneesh Kumar K.V * @dentry: dentry that is being deleted 529fd2916bdSFabian Frederick * @flags: removing a directory 5302bad8471SEric Van Hensbergen * 5312bad8471SEric Van Hensbergen */ 5322bad8471SEric Van Hensbergen 53348e370ffSAneesh Kumar K.V static int v9fs_remove(struct inode *dir, struct dentry *dentry, int flags) 5342bad8471SEric Van Hensbergen { 53548e370ffSAneesh Kumar K.V struct inode *inode; 53648e370ffSAneesh Kumar K.V int retval = -EOPNOTSUPP; 53748e370ffSAneesh Kumar K.V struct p9_fid *v9fid, *dfid; 53848e370ffSAneesh Kumar K.V struct v9fs_session_info *v9ses; 5392bad8471SEric Van Hensbergen 5405d385153SJoe Perches p9_debug(P9_DEBUG_VFS, "inode: %p dentry: %p rmdir: %x\n", 54148e370ffSAneesh Kumar K.V dir, dentry, flags); 5422bad8471SEric Van Hensbergen 54348e370ffSAneesh Kumar K.V v9ses = v9fs_inode2v9ses(dir); 5442b0143b5SDavid Howells inode = d_inode(dentry); 54577d5a6b7SAl Viro dfid = v9fs_parent_fid(dentry); 54648e370ffSAneesh Kumar K.V if (IS_ERR(dfid)) { 54748e370ffSAneesh Kumar K.V retval = PTR_ERR(dfid); 5485d385153SJoe Perches p9_debug(P9_DEBUG_VFS, "fid lookup failed %d\n", retval); 54948e370ffSAneesh Kumar K.V return retval; 55048e370ffSAneesh Kumar K.V } 55148e370ffSAneesh Kumar K.V if (v9fs_proto_dotl(v9ses)) 552f88657ceSAneesh Kumar K.V retval = p9_client_unlinkat(dfid, dentry->d_name.name, 553f88657ceSAneesh Kumar K.V v9fs_at_to_dotl_flags(flags)); 5546636b6dcSJianyong Wu p9_client_clunk(dfid); 55548e370ffSAneesh Kumar K.V if (retval == -EOPNOTSUPP) { 55648e370ffSAneesh Kumar K.V /* Try the one based on path */ 55748e370ffSAneesh Kumar K.V v9fid = v9fs_fid_clone(dentry); 558da977b2cSEric Van Hensbergen if (IS_ERR(v9fid)) 559da977b2cSEric Van Hensbergen return PTR_ERR(v9fid); 560d994f405SAneesh Kumar K.V retval = p9_client_remove(v9fid); 56148e370ffSAneesh Kumar K.V } 562b271ec47SAneesh Kumar K.V if (!retval) { 563b271ec47SAneesh Kumar K.V /* 564b271ec47SAneesh Kumar K.V * directories on unlink should have zero 565b271ec47SAneesh Kumar K.V * link count 566b271ec47SAneesh Kumar K.V */ 56748e370ffSAneesh Kumar K.V if (flags & AT_REMOVEDIR) { 56848e370ffSAneesh Kumar K.V clear_nlink(inode); 569ac89b2efSEryu Guan v9fs_dec_count(dir); 570b271ec47SAneesh Kumar K.V } else 571ac89b2efSEryu Guan v9fs_dec_count(inode); 572d28c61f0SAneesh Kumar K.V 57348e370ffSAneesh Kumar K.V v9fs_invalidate_inode_attr(inode); 574d28c61f0SAneesh Kumar K.V v9fs_invalidate_inode_attr(dir); 575154372e6SEric Van Hensbergen 576154372e6SEric Van Hensbergen /* invalidate all fids associated with dentry */ 577154372e6SEric Van Hensbergen /* NOTE: This will not include open fids */ 578154372e6SEric Van Hensbergen dentry->d_op->d_release(dentry); 579b271ec47SAneesh Kumar K.V } 580d994f405SAneesh Kumar K.V return retval; 5812bad8471SEric Van Hensbergen } 5822bad8471SEric Van Hensbergen 583bd238fb4SLatchesar Ionkov /** 584bd238fb4SLatchesar Ionkov * v9fs_create - Create a file 585ee443996SEric Van Hensbergen * @v9ses: session information 586ee443996SEric Van Hensbergen * @dir: directory that dentry is being created in 587bd238fb4SLatchesar Ionkov * @dentry: dentry that is being created 5880e15597eSAbhishek Kulkarni * @extension: 9p2000.u extension string to support devices, etc. 589bd238fb4SLatchesar Ionkov * @perm: create permissions 590bd238fb4SLatchesar Ionkov * @mode: open mode 591bd238fb4SLatchesar Ionkov * 592bd238fb4SLatchesar Ionkov */ 593bd238fb4SLatchesar Ionkov static struct p9_fid * 594bd238fb4SLatchesar Ionkov v9fs_create(struct v9fs_session_info *v9ses, struct inode *dir, 595bd238fb4SLatchesar Ionkov struct dentry *dentry, char *extension, u32 perm, u8 mode) 596bd238fb4SLatchesar Ionkov { 597bd238fb4SLatchesar Ionkov int err; 5987880b43bSAl Viro const unsigned char *name; 5996636b6dcSJianyong Wu struct p9_fid *dfid, *ofid = NULL, *fid = NULL; 600bd238fb4SLatchesar Ionkov struct inode *inode; 601bd238fb4SLatchesar Ionkov 6024b8e9923SAl Viro p9_debug(P9_DEBUG_VFS, "name %pd\n", dentry); 60351a87c55SEric Van Hensbergen 604bd238fb4SLatchesar Ionkov err = 0; 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); 6186636b6dcSJianyong Wu p9_client_clunk(dfid); 6196d27e64dSVenkateswararao Jujjuri return ERR_PTR(err); 620bd238fb4SLatchesar Ionkov } 621bd238fb4SLatchesar Ionkov 622bd238fb4SLatchesar Ionkov err = p9_client_fcreate(ofid, name, perm, mode, extension); 62351a87c55SEric Van Hensbergen if (err < 0) { 6245d385153SJoe Perches p9_debug(P9_DEBUG_VFS, "p9_client_fcreate failed %d\n", err); 6256636b6dcSJianyong Wu p9_client_clunk(dfid); 626bd238fb4SLatchesar Ionkov goto error; 62751a87c55SEric Van Hensbergen } 628bd238fb4SLatchesar Ionkov 629b6054793SAneesh Kumar K.V if (!(perm & P9_DMLINK)) { 630bd238fb4SLatchesar Ionkov /* now walk from the parent so we can get unopened fid */ 6316d27e64dSVenkateswararao Jujjuri fid = p9_client_walk(dfid, 1, &name, 1); 632bd238fb4SLatchesar Ionkov if (IS_ERR(fid)) { 633bd238fb4SLatchesar Ionkov err = PTR_ERR(fid); 634b6054793SAneesh Kumar K.V p9_debug(P9_DEBUG_VFS, 635b6054793SAneesh Kumar K.V "p9_client_walk failed %d\n", err); 636bd238fb4SLatchesar Ionkov fid = NULL; 6376636b6dcSJianyong Wu p9_client_clunk(dfid); 638bd238fb4SLatchesar Ionkov goto error; 6396d27e64dSVenkateswararao Jujjuri } 640b6054793SAneesh Kumar K.V /* 641b6054793SAneesh Kumar K.V * instantiate inode and assign the unopened fid to the dentry 642b6054793SAneesh Kumar K.V */ 643ed80fcfaSAneesh Kumar K.V inode = v9fs_get_new_inode_from_fid(v9ses, fid, dir->i_sb); 644bd238fb4SLatchesar Ionkov if (IS_ERR(inode)) { 645bd238fb4SLatchesar Ionkov err = PTR_ERR(inode); 646b6054793SAneesh Kumar K.V p9_debug(P9_DEBUG_VFS, 647b6054793SAneesh Kumar K.V "inode creation failed %d\n", err); 6486636b6dcSJianyong Wu p9_client_clunk(dfid); 649bd238fb4SLatchesar Ionkov goto error; 650bd238fb4SLatchesar Ionkov } 6512ea03e1dSAl Viro v9fs_fid_add(dentry, fid); 6525441ae5eSAneesh Kumar K.V d_instantiate(dentry, inode); 653b6054793SAneesh Kumar K.V } 6546636b6dcSJianyong Wu p9_client_clunk(dfid); 655bd238fb4SLatchesar Ionkov return ofid; 656bd238fb4SLatchesar Ionkov error: 657bd238fb4SLatchesar Ionkov if (ofid) 658bd238fb4SLatchesar Ionkov p9_client_clunk(ofid); 659bd238fb4SLatchesar Ionkov 660bd238fb4SLatchesar Ionkov if (fid) 661bd238fb4SLatchesar Ionkov p9_client_clunk(fid); 662bd238fb4SLatchesar Ionkov 663bd238fb4SLatchesar Ionkov return ERR_PTR(err); 664bd238fb4SLatchesar Ionkov } 665bd238fb4SLatchesar Ionkov 6662bad8471SEric Van Hensbergen /** 667e43ae79cSMiklos Szeredi * v9fs_vfs_create - VFS hook to create a regular file 668*bc868036SDavid Howells * @mnt_userns: The user namespace of the mount 669*bc868036SDavid Howells * @dir: The parent directory 670*bc868036SDavid Howells * @dentry: The name of file to be created 671*bc868036SDavid Howells * @mode: The UNIX file mode to set 672*bc868036SDavid Howells * @excl: True if the file must not yet exist 673e43ae79cSMiklos Szeredi * 674e43ae79cSMiklos Szeredi * open(.., O_CREAT) is handled in v9fs_vfs_atomic_open(). This is only called 675e43ae79cSMiklos Szeredi * for mknod(2). 676e43ae79cSMiklos Szeredi * 6772bad8471SEric Van Hensbergen */ 6782bad8471SEric Van Hensbergen 6792bad8471SEric Van Hensbergen static int 680549c7297SChristian Brauner v9fs_vfs_create(struct user_namespace *mnt_userns, struct inode *dir, 681549c7297SChristian Brauner struct dentry *dentry, umode_t mode, bool excl) 6822bad8471SEric Van Hensbergen { 683e43ae79cSMiklos Szeredi struct v9fs_session_info *v9ses = v9fs_inode2v9ses(dir); 684e43ae79cSMiklos Szeredi u32 perm = unixmode2p9mode(v9ses, mode); 685e43ae79cSMiklos Szeredi struct p9_fid *fid; 6866a3124a3SLatchesar Ionkov 687e43ae79cSMiklos Szeredi /* P9_OEXCL? */ 688e43ae79cSMiklos Szeredi fid = v9fs_create(v9ses, dir, dentry, NULL, perm, P9_ORDWR); 689e43ae79cSMiklos Szeredi if (IS_ERR(fid)) 690e43ae79cSMiklos Szeredi return PTR_ERR(fid); 6916a3124a3SLatchesar Ionkov 692d28c61f0SAneesh Kumar K.V v9fs_invalidate_inode_attr(dir); 693bd238fb4SLatchesar Ionkov p9_client_clunk(fid); 6946a3124a3SLatchesar Ionkov 6956a3124a3SLatchesar Ionkov return 0; 6962bad8471SEric Van Hensbergen } 6972bad8471SEric Van Hensbergen 6982bad8471SEric Van Hensbergen /** 6992bad8471SEric Van Hensbergen * v9fs_vfs_mkdir - VFS mkdir hook to create a directory 700*bc868036SDavid Howells * @mnt_userns: The user namespace of the mount 701ee443996SEric Van Hensbergen * @dir: inode that is being unlinked 7022bad8471SEric Van Hensbergen * @dentry: dentry that is being unlinked 7032bad8471SEric Van Hensbergen * @mode: mode for new directory 7042bad8471SEric Van Hensbergen * 7052bad8471SEric Van Hensbergen */ 7062bad8471SEric Van Hensbergen 707549c7297SChristian Brauner static int v9fs_vfs_mkdir(struct user_namespace *mnt_userns, struct inode *dir, 708549c7297SChristian Brauner struct dentry *dentry, umode_t mode) 7092bad8471SEric Van Hensbergen { 7106a3124a3SLatchesar Ionkov int err; 711bd238fb4SLatchesar Ionkov u32 perm; 712bd238fb4SLatchesar Ionkov struct p9_fid *fid; 713d28c61f0SAneesh Kumar K.V struct v9fs_session_info *v9ses; 7146a3124a3SLatchesar Ionkov 7154b8e9923SAl Viro p9_debug(P9_DEBUG_VFS, "name %pd\n", dentry); 716bd238fb4SLatchesar Ionkov err = 0; 7176a3124a3SLatchesar Ionkov v9ses = v9fs_inode2v9ses(dir); 7186a3124a3SLatchesar Ionkov perm = unixmode2p9mode(v9ses, mode | S_IFDIR); 719bd238fb4SLatchesar Ionkov fid = v9fs_create(v9ses, dir, dentry, NULL, perm, P9_OREAD); 720bd238fb4SLatchesar Ionkov if (IS_ERR(fid)) { 721bd238fb4SLatchesar Ionkov err = PTR_ERR(fid); 722bd238fb4SLatchesar Ionkov fid = NULL; 723d28c61f0SAneesh Kumar K.V } else { 724b271ec47SAneesh Kumar K.V inc_nlink(dir); 725d28c61f0SAneesh Kumar K.V v9fs_invalidate_inode_attr(dir); 726d28c61f0SAneesh Kumar K.V } 7276a3124a3SLatchesar Ionkov 728bd238fb4SLatchesar Ionkov if (fid) 729bd238fb4SLatchesar Ionkov p9_client_clunk(fid); 7306a3124a3SLatchesar Ionkov 7316a3124a3SLatchesar Ionkov return err; 7322bad8471SEric Van Hensbergen } 7332bad8471SEric Van Hensbergen 7342bad8471SEric Van Hensbergen /** 7352bad8471SEric Van Hensbergen * v9fs_vfs_lookup - VFS lookup hook to "walk" to a new inode 7362bad8471SEric Van Hensbergen * @dir: inode that is being walked from 7372bad8471SEric Van Hensbergen * @dentry: dentry that is being walked to? 738fd2916bdSFabian Frederick * @flags: lookup flags (unused) 7392bad8471SEric Van Hensbergen * 7402bad8471SEric Van Hensbergen */ 7412bad8471SEric Van Hensbergen 74253c06f4eSAneesh Kumar K.V struct dentry *v9fs_vfs_lookup(struct inode *dir, struct dentry *dentry, 74300cd8dd3SAl Viro unsigned int flags) 7442bad8471SEric Van Hensbergen { 74573f50717SAneesh Kumar K.V struct dentry *res; 7462bad8471SEric Van Hensbergen struct v9fs_session_info *v9ses; 747bd238fb4SLatchesar Ionkov struct p9_fid *dfid, *fid; 7482bad8471SEric Van Hensbergen struct inode *inode; 7497880b43bSAl Viro const unsigned char *name; 7502bad8471SEric Van Hensbergen 7514b8e9923SAl Viro p9_debug(P9_DEBUG_VFS, "dir: %p dentry: (%pd) %p flags: %x\n", 7524b8e9923SAl Viro dir, dentry, dentry, flags); 7532bad8471SEric Van Hensbergen 75411e9b49bSSripathi Kodi if (dentry->d_name.len > NAME_MAX) 75511e9b49bSSripathi Kodi return ERR_PTR(-ENAMETOOLONG); 75611e9b49bSSripathi Kodi 7572bad8471SEric Van Hensbergen v9ses = v9fs_inode2v9ses(dir); 758a534c8d1SAneesh Kumar K.V /* We can walk d_parent because we hold the dir->i_mutex */ 75977d5a6b7SAl Viro dfid = v9fs_parent_fid(dentry); 760bd238fb4SLatchesar Ionkov if (IS_ERR(dfid)) 761e231c2eeSDavid Howells return ERR_CAST(dfid); 7622bad8471SEric Van Hensbergen 76373f50717SAneesh Kumar K.V /* 76473f50717SAneesh Kumar K.V * Make sure we don't use a wrong inode due to parallel 76573f50717SAneesh Kumar K.V * unlink. For cached mode create calls request for new 76673f50717SAneesh Kumar K.V * inode. But with cache disabled, lookup should do this. 76773f50717SAneesh Kumar K.V */ 768500e2ab6SAl Viro name = dentry->d_name.name; 769500e2ab6SAl Viro fid = p9_client_walk(dfid, 1, &name, 1); 7706636b6dcSJianyong Wu p9_client_clunk(dfid); 771500e2ab6SAl Viro if (fid == ERR_PTR(-ENOENT)) 772500e2ab6SAl Viro inode = NULL; 773500e2ab6SAl Viro else if (IS_ERR(fid)) 774500e2ab6SAl Viro inode = ERR_CAST(fid); 775500e2ab6SAl Viro else if (v9ses->cache == CACHE_LOOSE || v9ses->cache == CACHE_FSCACHE) 776a78ce05dSAneesh Kumar K.V inode = v9fs_get_inode_from_fid(v9ses, fid, dir->i_sb); 77773f50717SAneesh Kumar K.V else 77873f50717SAneesh Kumar K.V inode = v9fs_get_new_inode_from_fid(v9ses, fid, dir->i_sb); 77973f50717SAneesh Kumar K.V /* 78073f50717SAneesh Kumar K.V * If we had a rename on the server and a parallel lookup 78173f50717SAneesh Kumar K.V * for the new name, then make sure we instantiate with 78273f50717SAneesh Kumar K.V * the new name. ie look up for a/b, while on server somebody 78373f50717SAneesh Kumar K.V * moved b under k and client parallely did a lookup for 78473f50717SAneesh Kumar K.V * k/b. 78573f50717SAneesh Kumar K.V */ 78641d28bcaSAl Viro res = d_splice_alias(inode, dentry); 787500e2ab6SAl Viro if (!IS_ERR(fid)) { 788a3b2157eSAl Viro if (!res) 789a3b2157eSAl Viro v9fs_fid_add(dentry, fid); 790a3b2157eSAl Viro else if (!IS_ERR(res)) 791a3b2157eSAl Viro v9fs_fid_add(res, fid); 792a3b2157eSAl Viro else 793bd238fb4SLatchesar Ionkov p9_client_clunk(fid); 794500e2ab6SAl Viro } 7957b5be621SAl Viro return res; 7962bad8471SEric Van Hensbergen } 7972bad8471SEric Van Hensbergen 798d9585277SAl Viro static int 799e43ae79cSMiklos Szeredi v9fs_vfs_atomic_open(struct inode *dir, struct dentry *dentry, 80044907d79SAl Viro struct file *file, unsigned flags, umode_t mode) 801e43ae79cSMiklos Szeredi { 802e43ae79cSMiklos Szeredi int err; 803e43ae79cSMiklos Szeredi u32 perm; 804e43ae79cSMiklos Szeredi struct v9fs_inode *v9inode; 805e43ae79cSMiklos Szeredi struct v9fs_session_info *v9ses; 806e43ae79cSMiklos Szeredi struct p9_fid *fid, *inode_fid; 807e43ae79cSMiklos Szeredi struct dentry *res = NULL; 808987a6485SGreg Kurz struct inode *inode; 809e43ae79cSMiklos Szeredi 81000699ad8SAl Viro if (d_in_lookup(dentry)) { 81100cd8dd3SAl Viro res = v9fs_vfs_lookup(dir, dentry, 0); 812e43ae79cSMiklos Szeredi if (IS_ERR(res)) 813d9585277SAl Viro return PTR_ERR(res); 814e43ae79cSMiklos Szeredi 815e43ae79cSMiklos Szeredi if (res) 816e43ae79cSMiklos Szeredi dentry = res; 817e43ae79cSMiklos Szeredi } 818e43ae79cSMiklos Szeredi 819e43ae79cSMiklos Szeredi /* Only creates */ 8202b0143b5SDavid Howells if (!(flags & O_CREAT) || d_really_is_positive(dentry)) 821e45198a6SAl Viro return finish_no_open(file, res); 822e43ae79cSMiklos Szeredi 823e43ae79cSMiklos Szeredi err = 0; 824fae74696SGeyslan G. Bem 825e43ae79cSMiklos Szeredi v9ses = v9fs_inode2v9ses(dir); 826e43ae79cSMiklos Szeredi perm = unixmode2p9mode(v9ses, mode); 827e43ae79cSMiklos Szeredi fid = v9fs_create(v9ses, dir, dentry, NULL, perm, 828e43ae79cSMiklos Szeredi v9fs_uflags2omode(flags, 829e43ae79cSMiklos Szeredi v9fs_proto_dotu(v9ses))); 830e43ae79cSMiklos Szeredi if (IS_ERR(fid)) { 831e43ae79cSMiklos Szeredi err = PTR_ERR(fid); 832e43ae79cSMiklos Szeredi fid = NULL; 833e43ae79cSMiklos Szeredi goto error; 834e43ae79cSMiklos Szeredi } 835e43ae79cSMiklos Szeredi 836e43ae79cSMiklos Szeredi v9fs_invalidate_inode_attr(dir); 837987a6485SGreg Kurz inode = d_inode(dentry); 838987a6485SGreg Kurz v9inode = V9FS_I(inode); 839e43ae79cSMiklos Szeredi mutex_lock(&v9inode->v_mutex); 840fb89b45cSDominique Martinet if ((v9ses->cache == CACHE_LOOSE || v9ses->cache == CACHE_FSCACHE) && 841fb89b45cSDominique Martinet !v9inode->writeback_fid && 842e43ae79cSMiklos Szeredi ((flags & O_ACCMODE) != O_RDONLY)) { 843e43ae79cSMiklos Szeredi /* 844e43ae79cSMiklos Szeredi * clone a fid and add it to writeback_fid 845e43ae79cSMiklos Szeredi * we do it during open time instead of 846e43ae79cSMiklos Szeredi * page dirty time via write_begin/page_mkwrite 847e43ae79cSMiklos Szeredi * because we want write after unlink usecase 848e43ae79cSMiklos Szeredi * to work. 849e43ae79cSMiklos Szeredi */ 850e43ae79cSMiklos Szeredi inode_fid = v9fs_writeback_fid(dentry); 851e43ae79cSMiklos Szeredi if (IS_ERR(inode_fid)) { 852e43ae79cSMiklos Szeredi err = PTR_ERR(inode_fid); 853e43ae79cSMiklos Szeredi mutex_unlock(&v9inode->v_mutex); 854e43ae79cSMiklos Szeredi goto error; 855e43ae79cSMiklos Szeredi } 856e43ae79cSMiklos Szeredi v9inode->writeback_fid = (void *) inode_fid; 857e43ae79cSMiklos Szeredi } 858e43ae79cSMiklos Szeredi mutex_unlock(&v9inode->v_mutex); 859be12af3eSAl Viro err = finish_open(file, dentry, generic_file_open); 86030d90494SAl Viro if (err) 861e43ae79cSMiklos Szeredi goto error; 862e43ae79cSMiklos Szeredi 86330d90494SAl Viro file->private_data = fid; 864fb89b45cSDominique Martinet if (v9ses->cache == CACHE_LOOSE || v9ses->cache == CACHE_FSCACHE) 8652b0143b5SDavid Howells v9fs_cache_inode_set_cookie(d_inode(dentry), file); 866987a6485SGreg Kurz v9fs_open_fid_add(inode, fid); 867e43ae79cSMiklos Szeredi 86873a09dd9SAl Viro file->f_mode |= FMODE_CREATED; 869e43ae79cSMiklos Szeredi out: 870e43ae79cSMiklos Szeredi dput(res); 871d9585277SAl Viro return err; 872e43ae79cSMiklos Szeredi 873e43ae79cSMiklos Szeredi error: 874e43ae79cSMiklos Szeredi if (fid) 875e43ae79cSMiklos Szeredi p9_client_clunk(fid); 876e43ae79cSMiklos Szeredi goto out; 877e43ae79cSMiklos Szeredi } 878e43ae79cSMiklos Szeredi 8792bad8471SEric Van Hensbergen /** 8802bad8471SEric Van Hensbergen * v9fs_vfs_unlink - VFS unlink hook to delete an inode 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_unlink(struct inode *i, struct dentry *d) 8872bad8471SEric Van Hensbergen { 8882bad8471SEric Van Hensbergen return v9fs_remove(i, d, 0); 8892bad8471SEric Van Hensbergen } 8902bad8471SEric Van Hensbergen 8912bad8471SEric Van Hensbergen /** 8922bad8471SEric Van Hensbergen * v9fs_vfs_rmdir - VFS unlink hook to delete a directory 8932bad8471SEric Van Hensbergen * @i: inode that is being unlinked 89473c592b9SEric Van Hensbergen * @d: dentry that is being unlinked 8952bad8471SEric Van Hensbergen * 8962bad8471SEric Van Hensbergen */ 8972bad8471SEric Van Hensbergen 89853c06f4eSAneesh Kumar K.V int v9fs_vfs_rmdir(struct inode *i, struct dentry *d) 8992bad8471SEric Van Hensbergen { 90048e370ffSAneesh Kumar K.V return v9fs_remove(i, d, AT_REMOVEDIR); 9012bad8471SEric Van Hensbergen } 9022bad8471SEric Van Hensbergen 9032bad8471SEric Van Hensbergen /** 9042bad8471SEric Van Hensbergen * v9fs_vfs_rename - VFS hook to rename an inode 905*bc868036SDavid Howells * @mnt_userns: The user namespace of the mount 9062bad8471SEric Van Hensbergen * @old_dir: old dir inode 9072bad8471SEric Van Hensbergen * @old_dentry: old dentry 9082bad8471SEric Van Hensbergen * @new_dir: new dir inode 9092bad8471SEric Van Hensbergen * @new_dentry: new dentry 910*bc868036SDavid Howells * @flags: RENAME_* flags 9112bad8471SEric Van Hensbergen * 9122bad8471SEric Van Hensbergen */ 9132bad8471SEric Van Hensbergen 91453c06f4eSAneesh Kumar K.V int 915549c7297SChristian Brauner v9fs_vfs_rename(struct user_namespace *mnt_userns, struct inode *old_dir, 916549c7297SChristian Brauner struct dentry *old_dentry, struct inode *new_dir, 917549c7297SChristian Brauner struct dentry *new_dentry, unsigned int flags) 9182bad8471SEric Van Hensbergen { 919d28c61f0SAneesh Kumar K.V int retval; 920bd238fb4SLatchesar Ionkov struct inode *old_inode; 921b271ec47SAneesh Kumar K.V struct inode *new_inode; 922bd238fb4SLatchesar Ionkov struct v9fs_session_info *v9ses; 9236636b6dcSJianyong Wu struct p9_fid *oldfid, *dfid; 924bd238fb4SLatchesar Ionkov struct p9_fid *olddirfid; 925bd238fb4SLatchesar Ionkov struct p9_fid *newdirfid; 926bd238fb4SLatchesar Ionkov struct p9_wstat wstat; 9272bad8471SEric Van Hensbergen 9281cd66c93SMiklos Szeredi if (flags) 9291cd66c93SMiklos Szeredi return -EINVAL; 9301cd66c93SMiklos Szeredi 9315d385153SJoe Perches p9_debug(P9_DEBUG_VFS, "\n"); 932bd238fb4SLatchesar Ionkov retval = 0; 9332b0143b5SDavid Howells old_inode = d_inode(old_dentry); 9342b0143b5SDavid Howells new_inode = d_inode(new_dentry); 935bd238fb4SLatchesar Ionkov v9ses = v9fs_inode2v9ses(old_inode); 936bd238fb4SLatchesar Ionkov oldfid = v9fs_fid_lookup(old_dentry); 937da977b2cSEric Van Hensbergen if (IS_ERR(oldfid)) 938da977b2cSEric Van Hensbergen return PTR_ERR(oldfid); 939da977b2cSEric Van Hensbergen 9406636b6dcSJianyong Wu dfid = v9fs_parent_fid(old_dentry); 9416636b6dcSJianyong Wu olddirfid = clone_fid(dfid); 9426636b6dcSJianyong Wu if (dfid && !IS_ERR(dfid)) 9436636b6dcSJianyong Wu p9_client_clunk(dfid); 9446636b6dcSJianyong Wu 945da977b2cSEric Van Hensbergen if (IS_ERR(olddirfid)) { 946da977b2cSEric Van Hensbergen retval = PTR_ERR(olddirfid); 947bd238fb4SLatchesar Ionkov goto done; 948da977b2cSEric Van Hensbergen } 949da977b2cSEric Van Hensbergen 9506636b6dcSJianyong Wu dfid = v9fs_parent_fid(new_dentry); 9516636b6dcSJianyong Wu newdirfid = clone_fid(dfid); 9526636b6dcSJianyong Wu p9_client_clunk(dfid); 9536636b6dcSJianyong Wu 954da977b2cSEric Van Hensbergen if (IS_ERR(newdirfid)) { 955da977b2cSEric Van Hensbergen retval = PTR_ERR(newdirfid); 956bd238fb4SLatchesar Ionkov goto clunk_olddir; 9572bad8471SEric Van Hensbergen } 9582bad8471SEric Van Hensbergen 959a534c8d1SAneesh Kumar K.V down_write(&v9ses->rename_sem); 9604681dbdaSSripathi Kodi if (v9fs_proto_dotl(v9ses)) { 9619e8fb38eSAneesh Kumar K.V retval = p9_client_renameat(olddirfid, old_dentry->d_name.name, 9629e8fb38eSAneesh Kumar K.V newdirfid, new_dentry->d_name.name); 9639e8fb38eSAneesh Kumar K.V if (retval == -EOPNOTSUPP) 9644681dbdaSSripathi Kodi retval = p9_client_rename(oldfid, newdirfid, 9659e8fb38eSAneesh Kumar K.V new_dentry->d_name.name); 9669e8fb38eSAneesh Kumar K.V if (retval != -EOPNOTSUPP) 9674681dbdaSSripathi Kodi goto clunk_newdir; 9684681dbdaSSripathi Kodi } 969a534c8d1SAneesh Kumar K.V if (old_dentry->d_parent != new_dentry->d_parent) { 970a534c8d1SAneesh Kumar K.V /* 971a534c8d1SAneesh Kumar K.V * 9P .u can only handle file rename in the same directory 972a534c8d1SAneesh Kumar K.V */ 9734681dbdaSSripathi Kodi 9745d385153SJoe Perches p9_debug(P9_DEBUG_ERROR, "old dir and new dir are different\n"); 975621997cdSEric Van Hensbergen retval = -EXDEV; 976bd238fb4SLatchesar Ionkov goto clunk_newdir; 9772bad8471SEric Van Hensbergen } 978531b1094SLatchesar Ionkov v9fs_blank_wstat(&wstat); 979ba17674fSLatchesar Ionkov wstat.muid = v9ses->uname; 9807880b43bSAl Viro wstat.name = new_dentry->d_name.name; 981bd238fb4SLatchesar Ionkov retval = p9_client_wstat(oldfid, &wstat); 9822bad8471SEric Van Hensbergen 983bd238fb4SLatchesar Ionkov clunk_newdir: 984b271ec47SAneesh Kumar K.V if (!retval) { 985b271ec47SAneesh Kumar K.V if (new_inode) { 986b271ec47SAneesh Kumar K.V if (S_ISDIR(new_inode->i_mode)) 987b271ec47SAneesh Kumar K.V clear_nlink(new_inode); 988b271ec47SAneesh Kumar K.V else 989ac89b2efSEryu Guan v9fs_dec_count(new_inode); 990b271ec47SAneesh Kumar K.V } 991b271ec47SAneesh Kumar K.V if (S_ISDIR(old_inode->i_mode)) { 992b271ec47SAneesh Kumar K.V if (!new_inode) 993b271ec47SAneesh Kumar K.V inc_nlink(new_dir); 994ac89b2efSEryu Guan v9fs_dec_count(old_dir); 995b271ec47SAneesh Kumar K.V } 9963bc86de3SAneesh Kumar K.V v9fs_invalidate_inode_attr(old_inode); 997d28c61f0SAneesh Kumar K.V v9fs_invalidate_inode_attr(old_dir); 998d28c61f0SAneesh Kumar K.V v9fs_invalidate_inode_attr(new_dir); 9993bc86de3SAneesh Kumar K.V 1000a534c8d1SAneesh Kumar K.V /* successful rename */ 1001a534c8d1SAneesh Kumar K.V d_move(old_dentry, new_dentry); 1002b271ec47SAneesh Kumar K.V } 1003a534c8d1SAneesh Kumar K.V up_write(&v9ses->rename_sem); 100422150c4fSLatchesar Ionkov p9_client_clunk(newdirfid); 10052bad8471SEric Van Hensbergen 1006bd238fb4SLatchesar Ionkov clunk_olddir: 100722150c4fSLatchesar Ionkov p9_client_clunk(olddirfid); 10082bad8471SEric Van Hensbergen 1009bd238fb4SLatchesar Ionkov done: 10106636b6dcSJianyong Wu p9_client_clunk(oldfid); 10112bad8471SEric Van Hensbergen return retval; 10122bad8471SEric Van Hensbergen } 10132bad8471SEric Van Hensbergen 10142bad8471SEric Van Hensbergen /** 1015943ffb58SAdrian Bunk * v9fs_vfs_getattr - retrieve file metadata 1016*bc868036SDavid Howells * @mnt_userns: The user namespace of the mount 1017a528d35eSDavid Howells * @path: Object to query 1018ee443996SEric Van Hensbergen * @stat: metadata structure to populate 1019a528d35eSDavid Howells * @request_mask: Mask of STATX_xxx flags indicating the caller's interests 1020a528d35eSDavid Howells * @flags: AT_STATX_xxx setting 10212bad8471SEric Van Hensbergen * 10222bad8471SEric Van Hensbergen */ 10232bad8471SEric Van Hensbergen 10242bad8471SEric Van Hensbergen static int 1025549c7297SChristian Brauner v9fs_vfs_getattr(struct user_namespace *mnt_userns, const struct path *path, 1026549c7297SChristian Brauner struct kstat *stat, u32 request_mask, unsigned int flags) 10272bad8471SEric Van Hensbergen { 1028a528d35eSDavid Howells struct dentry *dentry = path->dentry; 1029bd238fb4SLatchesar Ionkov struct v9fs_session_info *v9ses; 1030bd238fb4SLatchesar Ionkov struct p9_fid *fid; 103151a87c55SEric Van Hensbergen struct p9_wstat *st; 10322bad8471SEric Van Hensbergen 10335d385153SJoe Perches p9_debug(P9_DEBUG_VFS, "dentry: %p\n", dentry); 103442869c8aSAneesh Kumar K.V v9ses = v9fs_dentry2v9ses(dentry); 1035a1211908SAneesh Kumar K.V if (v9ses->cache == CACHE_LOOSE || v9ses->cache == CACHE_FSCACHE) { 10360d56a451SChristian Brauner generic_fillattr(&init_user_ns, d_inode(dentry), stat); 1037a1211908SAneesh Kumar K.V return 0; 1038a1211908SAneesh Kumar K.V } 1039bd238fb4SLatchesar Ionkov fid = v9fs_fid_lookup(dentry); 1040da977b2cSEric Van Hensbergen if (IS_ERR(fid)) 1041da977b2cSEric Van Hensbergen return PTR_ERR(fid); 10422bad8471SEric Van Hensbergen 1043bd238fb4SLatchesar Ionkov st = p9_client_stat(fid); 10446636b6dcSJianyong Wu p9_client_clunk(fid); 1045bd238fb4SLatchesar Ionkov if (IS_ERR(st)) 1046bd238fb4SLatchesar Ionkov return PTR_ERR(st); 10472bad8471SEric Van Hensbergen 10485e3cc1eeSHou Tao v9fs_stat2inode(st, d_inode(dentry), dentry->d_sb, 0); 10490d56a451SChristian Brauner generic_fillattr(&init_user_ns, d_inode(dentry), stat); 10502bad8471SEric Van Hensbergen 105162b2be59SLatchesar Ionkov p9stat_free(st); 1052bd238fb4SLatchesar Ionkov kfree(st); 1053bd238fb4SLatchesar Ionkov return 0; 10542bad8471SEric Van Hensbergen } 10552bad8471SEric Van Hensbergen 10562bad8471SEric Van Hensbergen /** 10572bad8471SEric Van Hensbergen * v9fs_vfs_setattr - set file metadata 1058*bc868036SDavid Howells * @mnt_userns: The user namespace of the mount 10592bad8471SEric Van Hensbergen * @dentry: file whose metadata to set 10602bad8471SEric Van Hensbergen * @iattr: metadata assignment structure 10612bad8471SEric Van Hensbergen * 10622bad8471SEric Van Hensbergen */ 10632bad8471SEric Van Hensbergen 1064549c7297SChristian Brauner static int v9fs_vfs_setattr(struct user_namespace *mnt_userns, 1065549c7297SChristian Brauner struct dentry *dentry, struct iattr *iattr) 10662bad8471SEric Van Hensbergen { 10676636b6dcSJianyong Wu int retval, use_dentry = 0; 1068bd238fb4SLatchesar Ionkov struct v9fs_session_info *v9ses; 106966246641SJianyong Wu struct p9_fid *fid = NULL; 1070bd238fb4SLatchesar Ionkov struct p9_wstat wstat; 10712bad8471SEric Van Hensbergen 10725d385153SJoe Perches p9_debug(P9_DEBUG_VFS, "\n"); 10732f221d6fSChristian Brauner retval = setattr_prepare(&init_user_ns, dentry, iattr); 1074059c138bSAneesh Kumar K.V if (retval) 1075059c138bSAneesh Kumar K.V return retval; 1076059c138bSAneesh Kumar K.V 1077bd238fb4SLatchesar Ionkov retval = -EPERM; 107842869c8aSAneesh Kumar K.V v9ses = v9fs_dentry2v9ses(dentry); 107966246641SJianyong Wu if (iattr->ia_valid & ATTR_FILE) { 108066246641SJianyong Wu fid = iattr->ia_file->private_data; 108166246641SJianyong Wu WARN_ON(!fid); 108266246641SJianyong Wu } 10836636b6dcSJianyong Wu if (!fid) { 1084bd238fb4SLatchesar Ionkov fid = v9fs_fid_lookup(dentry); 10856636b6dcSJianyong Wu use_dentry = 1; 10866636b6dcSJianyong Wu } 1087da977b2cSEric Van Hensbergen if(IS_ERR(fid)) 1088da977b2cSEric Van Hensbergen return PTR_ERR(fid); 10892bad8471SEric Van Hensbergen 1090531b1094SLatchesar Ionkov v9fs_blank_wstat(&wstat); 10912bad8471SEric Van Hensbergen if (iattr->ia_valid & ATTR_MODE) 1092531b1094SLatchesar Ionkov wstat.mode = unixmode2p9mode(v9ses, iattr->ia_mode); 10932bad8471SEric Van Hensbergen 10942bad8471SEric Van Hensbergen if (iattr->ia_valid & ATTR_MTIME) 1095531b1094SLatchesar Ionkov wstat.mtime = iattr->ia_mtime.tv_sec; 10962bad8471SEric Van Hensbergen 10972bad8471SEric Van Hensbergen if (iattr->ia_valid & ATTR_ATIME) 1098531b1094SLatchesar Ionkov wstat.atime = iattr->ia_atime.tv_sec; 10992bad8471SEric Van Hensbergen 11002bad8471SEric Van Hensbergen if (iattr->ia_valid & ATTR_SIZE) 1101531b1094SLatchesar Ionkov wstat.length = iattr->ia_size; 11022bad8471SEric Van Hensbergen 1103dd6102fbSSripathi Kodi if (v9fs_proto_dotu(v9ses)) { 1104531b1094SLatchesar Ionkov if (iattr->ia_valid & ATTR_UID) 1105531b1094SLatchesar Ionkov wstat.n_uid = iattr->ia_uid; 11062bad8471SEric Van Hensbergen 1107531b1094SLatchesar Ionkov if (iattr->ia_valid & ATTR_GID) 1108531b1094SLatchesar Ionkov wstat.n_gid = iattr->ia_gid; 11092bad8471SEric Van Hensbergen } 1110059c138bSAneesh Kumar K.V 11113dc5436aSAneesh Kumar K.V /* Write all dirty data */ 1112e36cb0b8SDavid Howells if (d_is_reg(dentry)) 11132b0143b5SDavid Howells filemap_write_and_wait(d_inode(dentry)->i_mapping); 11143dc5436aSAneesh Kumar K.V 1115f10fc50fSAneesh Kumar K.V retval = p9_client_wstat(fid, &wstat); 11166636b6dcSJianyong Wu 11176636b6dcSJianyong Wu if (use_dentry) 11186636b6dcSJianyong Wu p9_client_clunk(fid); 11196636b6dcSJianyong Wu 1120f10fc50fSAneesh Kumar K.V if (retval < 0) 1121f10fc50fSAneesh Kumar K.V return retval; 1122059c138bSAneesh Kumar K.V 1123059c138bSAneesh Kumar K.V if ((iattr->ia_valid & ATTR_SIZE) && 11242b0143b5SDavid Howells iattr->ia_size != i_size_read(d_inode(dentry))) 11252b0143b5SDavid Howells truncate_setsize(d_inode(dentry), iattr->ia_size); 1126059c138bSAneesh Kumar K.V 11272b0143b5SDavid Howells v9fs_invalidate_inode_attr(d_inode(dentry)); 11281025774cSChristoph Hellwig 11292f221d6fSChristian Brauner setattr_copy(&init_user_ns, d_inode(dentry), iattr); 11302b0143b5SDavid Howells mark_inode_dirty(d_inode(dentry)); 11311025774cSChristoph Hellwig return 0; 11322bad8471SEric Van Hensbergen } 11332bad8471SEric Van Hensbergen 11342bad8471SEric Van Hensbergen /** 1135531b1094SLatchesar Ionkov * v9fs_stat2inode - populate an inode structure with mistat info 1136531b1094SLatchesar Ionkov * @stat: Plan 9 metadata (mistat) structure 11372bad8471SEric Van Hensbergen * @inode: inode to populate 11382bad8471SEric Van Hensbergen * @sb: superblock of filesystem 11395e3cc1eeSHou Tao * @flags: control flags (e.g. V9FS_STAT2INODE_KEEP_ISIZE) 11402bad8471SEric Van Hensbergen * 11412bad8471SEric Van Hensbergen */ 11422bad8471SEric Van Hensbergen 11432bad8471SEric Van Hensbergen void 114451a87c55SEric Van Hensbergen v9fs_stat2inode(struct p9_wstat *stat, struct inode *inode, 11455e3cc1eeSHou Tao struct super_block *sb, unsigned int flags) 11462bad8471SEric Van Hensbergen { 11473eda0de6SAl Viro umode_t mode; 11482bad8471SEric Van Hensbergen struct v9fs_session_info *v9ses = sb->s_fs_info; 1149b3cbea03SAneesh Kumar K.V struct v9fs_inode *v9inode = V9FS_I(inode); 11502bad8471SEric Van Hensbergen 1151bfe86848SMiklos Szeredi set_nlink(inode, 1); 11522bad8471SEric Van Hensbergen 1153531b1094SLatchesar Ionkov inode->i_atime.tv_sec = stat->atime; 1154531b1094SLatchesar Ionkov inode->i_mtime.tv_sec = stat->mtime; 1155531b1094SLatchesar Ionkov inode->i_ctime.tv_sec = stat->mtime; 11562bad8471SEric Van Hensbergen 1157bd32b82dSLatchesar Ionkov inode->i_uid = v9ses->dfltuid; 1158bd32b82dSLatchesar Ionkov inode->i_gid = v9ses->dfltgid; 11592bad8471SEric Van Hensbergen 1160dd6102fbSSripathi Kodi if (v9fs_proto_dotu(v9ses)) { 1161531b1094SLatchesar Ionkov inode->i_uid = stat->n_uid; 1162531b1094SLatchesar Ionkov inode->i_gid = stat->n_gid; 1163531b1094SLatchesar Ionkov } 11645717144aSAneesh Kumar K.V if ((S_ISREG(inode->i_mode)) || (S_ISDIR(inode->i_mode))) { 11659652c732SAl Viro if (v9fs_proto_dotu(v9ses)) { 11669652c732SAl Viro unsigned int i_nlink; 11675717144aSAneesh Kumar K.V /* 11689652c732SAl Viro * Hadlink support got added later to the .u extension. 11699652c732SAl Viro * So there can be a server out there that doesn't 11709652c732SAl Viro * support this even with .u extension. That would 11719652c732SAl Viro * just leave us with stat->extension being an empty 11729652c732SAl Viro * string, though. 11735717144aSAneesh Kumar K.V */ 11745717144aSAneesh Kumar K.V /* HARDLINKCOUNT %u */ 11759652c732SAl Viro if (sscanf(stat->extension, 11769652c732SAl Viro " HARDLINKCOUNT %u", &i_nlink) == 1) 1177bfe86848SMiklos Szeredi set_nlink(inode, i_nlink); 11785717144aSAneesh Kumar K.V } 11795717144aSAneesh Kumar K.V } 1180df345c67SAneesh Kumar K.V mode = p9mode2perm(v9ses, stat); 118145089142SAneesh Kumar K.V mode |= inode->i_mode & ~S_IALLUGO; 118245089142SAneesh Kumar K.V inode->i_mode = mode; 11832bad8471SEric Van Hensbergen 11845e3cc1eeSHou Tao if (!(flags & V9FS_STAT2INODE_KEEP_ISIZE)) 11855e3cc1eeSHou Tao v9fs_i_size_write(inode, stat->length); 1186bd238fb4SLatchesar Ionkov /* not real number of blocks, but 512 byte ones ... */ 11875e3cc1eeSHou Tao inode->i_blocks = (stat->length + 512 - 1) >> 9; 1188b3cbea03SAneesh Kumar K.V v9inode->cache_validity &= ~V9FS_INO_INVALID_ATTR; 11892bad8471SEric Van Hensbergen } 11902bad8471SEric Van Hensbergen 11912bad8471SEric Van Hensbergen /** 11922bad8471SEric Van Hensbergen * v9fs_qid2ino - convert qid into inode number 11932bad8471SEric Van Hensbergen * @qid: qid to hash 11942bad8471SEric Van Hensbergen * 11952bad8471SEric Van Hensbergen * BUG: potential for inode number collisions? 11962bad8471SEric Van Hensbergen */ 11972bad8471SEric Van Hensbergen 1198bd238fb4SLatchesar Ionkov ino_t v9fs_qid2ino(struct p9_qid *qid) 11992bad8471SEric Van Hensbergen { 12002bad8471SEric Van Hensbergen u64 path = qid->path + 2; 12012bad8471SEric Van Hensbergen ino_t i = 0; 12022bad8471SEric Van Hensbergen 12032bad8471SEric Van Hensbergen if (sizeof(ino_t) == sizeof(path)) 12042bad8471SEric Van Hensbergen memcpy(&i, &path, sizeof(ino_t)); 12052bad8471SEric Van Hensbergen else 12062bad8471SEric Van Hensbergen i = (ino_t) (path ^ (path >> 32)); 12072bad8471SEric Van Hensbergen 12082bad8471SEric Van Hensbergen return i; 12092bad8471SEric Van Hensbergen } 12102bad8471SEric Van Hensbergen 12112bad8471SEric Van Hensbergen /** 12126b255391SAl Viro * v9fs_vfs_get_link - follow a symlink path 12132bad8471SEric Van Hensbergen * @dentry: dentry for symlink 12146b255391SAl Viro * @inode: inode for symlink 1215fceef393SAl Viro * @done: delayed call for when we are done with the return value 12162bad8471SEric Van Hensbergen */ 12172bad8471SEric Van Hensbergen 12186b255391SAl Viro static const char *v9fs_vfs_get_link(struct dentry *dentry, 1219fceef393SAl Viro struct inode *inode, 1220fceef393SAl Viro struct delayed_call *done) 12212bad8471SEric Van Hensbergen { 12226b255391SAl Viro struct v9fs_session_info *v9ses; 12236b255391SAl Viro struct p9_fid *fid; 122490e4fc88SAl Viro struct p9_wstat *st; 1225680baacbSAl Viro char *res; 12262bad8471SEric Van Hensbergen 12276b255391SAl Viro if (!dentry) 12286b255391SAl Viro return ERR_PTR(-ECHILD); 12296b255391SAl Viro 12306b255391SAl Viro v9ses = v9fs_dentry2v9ses(dentry); 12316b255391SAl Viro fid = v9fs_fid_lookup(dentry); 12324b8e9923SAl Viro p9_debug(P9_DEBUG_VFS, "%pd\n", dentry); 12332bad8471SEric Van Hensbergen 123490e4fc88SAl Viro if (IS_ERR(fid)) 123590e4fc88SAl Viro return ERR_CAST(fid); 12362bad8471SEric Van Hensbergen 123790e4fc88SAl Viro if (!v9fs_proto_dotu(v9ses)) 123890e4fc88SAl Viro return ERR_PTR(-EBADF); 123990e4fc88SAl Viro 124090e4fc88SAl Viro st = p9_client_stat(fid); 12416636b6dcSJianyong Wu p9_client_clunk(fid); 124290e4fc88SAl Viro if (IS_ERR(st)) 124390e4fc88SAl Viro return ERR_CAST(st); 124490e4fc88SAl Viro 124590e4fc88SAl Viro if (!(st->mode & P9_DMSYMLINK)) { 124690e4fc88SAl Viro p9stat_free(st); 124790e4fc88SAl Viro kfree(st); 124890e4fc88SAl Viro return ERR_PTR(-EINVAL); 12492bad8471SEric Van Hensbergen } 1250680baacbSAl Viro res = st->extension; 125190e4fc88SAl Viro st->extension = NULL; 1252680baacbSAl Viro if (strlen(res) >= PATH_MAX) 1253680baacbSAl Viro res[PATH_MAX - 1] = '\0'; 1254680baacbSAl Viro 125590e4fc88SAl Viro p9stat_free(st); 125690e4fc88SAl Viro kfree(st); 1257fceef393SAl Viro set_delayed_call(done, kfree_link, res); 1258fceef393SAl Viro return res; 12592bad8471SEric Van Hensbergen } 12602bad8471SEric Van Hensbergen 12612bad8471SEric Van Hensbergen /** 1262ee443996SEric Van Hensbergen * v9fs_vfs_mkspecial - create a special file 1263ee443996SEric Van Hensbergen * @dir: inode to create special file in 1264ee443996SEric Van Hensbergen * @dentry: dentry to create 1265fd2916bdSFabian Frederick * @perm: mode to create special file 1266ee443996SEric Van Hensbergen * @extension: 9p2000.u format extension string representing special file 1267ee443996SEric Van Hensbergen * 1268ee443996SEric Van Hensbergen */ 1269ee443996SEric Van Hensbergen 1270531b1094SLatchesar Ionkov static int v9fs_vfs_mkspecial(struct inode *dir, struct dentry *dentry, 1271c2837de7SAl Viro u32 perm, const char *extension) 1272531b1094SLatchesar Ionkov { 1273bd238fb4SLatchesar Ionkov struct p9_fid *fid; 1274d28c61f0SAneesh Kumar K.V struct v9fs_session_info *v9ses; 1275531b1094SLatchesar Ionkov 12766a3124a3SLatchesar Ionkov v9ses = v9fs_inode2v9ses(dir); 1277dd6102fbSSripathi Kodi if (!v9fs_proto_dotu(v9ses)) { 12785d385153SJoe Perches p9_debug(P9_DEBUG_ERROR, "not extended\n"); 12796a3124a3SLatchesar Ionkov return -EPERM; 1280531b1094SLatchesar Ionkov } 1281531b1094SLatchesar Ionkov 1282bd238fb4SLatchesar Ionkov fid = v9fs_create(v9ses, dir, dentry, (char *) extension, perm, 1283bd238fb4SLatchesar Ionkov P9_OREAD); 1284bd238fb4SLatchesar Ionkov if (IS_ERR(fid)) 1285bd238fb4SLatchesar Ionkov return PTR_ERR(fid); 1286da977b2cSEric Van Hensbergen 1287d28c61f0SAneesh Kumar K.V v9fs_invalidate_inode_attr(dir); 1288bd238fb4SLatchesar Ionkov p9_client_clunk(fid); 12896a3124a3SLatchesar Ionkov return 0; 1290531b1094SLatchesar Ionkov } 1291531b1094SLatchesar Ionkov 1292531b1094SLatchesar Ionkov /** 1293531b1094SLatchesar Ionkov * v9fs_vfs_symlink - helper function to create symlinks 1294*bc868036SDavid Howells * @mnt_userns: The user namespace of the mount 1295531b1094SLatchesar Ionkov * @dir: directory inode containing symlink 1296531b1094SLatchesar Ionkov * @dentry: dentry for symlink 1297531b1094SLatchesar Ionkov * @symname: symlink data 1298531b1094SLatchesar Ionkov * 1299ee443996SEric Van Hensbergen * See Also: 9P2000.u RFC for more information 1300531b1094SLatchesar Ionkov * 1301531b1094SLatchesar Ionkov */ 1302531b1094SLatchesar Ionkov 1303531b1094SLatchesar Ionkov static int 1304549c7297SChristian Brauner v9fs_vfs_symlink(struct user_namespace *mnt_userns, struct inode *dir, 1305549c7297SChristian Brauner struct dentry *dentry, const char *symname) 1306531b1094SLatchesar Ionkov { 13074b8e9923SAl Viro p9_debug(P9_DEBUG_VFS, " %lu,%pd,%s\n", 13084b8e9923SAl Viro dir->i_ino, dentry, symname); 1309531b1094SLatchesar Ionkov 1310c2837de7SAl Viro return v9fs_vfs_mkspecial(dir, dentry, P9_DMSYMLINK, symname); 1311531b1094SLatchesar Ionkov } 1312531b1094SLatchesar Ionkov 1313b46c267eSAl Viro #define U32_MAX_DIGITS 10 1314b46c267eSAl Viro 13152bad8471SEric Van Hensbergen /** 13162bad8471SEric Van Hensbergen * v9fs_vfs_link - create a hardlink 13172bad8471SEric Van Hensbergen * @old_dentry: dentry for file to link to 13182bad8471SEric Van Hensbergen * @dir: inode destination for new link 131973c592b9SEric Van Hensbergen * @dentry: dentry for link 13202bad8471SEric Van Hensbergen * 13212bad8471SEric Van Hensbergen */ 13222bad8471SEric Van Hensbergen 13232bad8471SEric Van Hensbergen static int 13242bad8471SEric Van Hensbergen v9fs_vfs_link(struct dentry *old_dentry, struct inode *dir, 13252bad8471SEric Van Hensbergen struct dentry *dentry) 13262bad8471SEric Van Hensbergen { 1327531b1094SLatchesar Ionkov int retval; 1328b46c267eSAl Viro char name[1 + U32_MAX_DIGITS + 2]; /* sign + number + \n + \0 */ 1329d28c61f0SAneesh Kumar K.V struct p9_fid *oldfid; 13302bad8471SEric Van Hensbergen 13314b8e9923SAl Viro p9_debug(P9_DEBUG_VFS, " %lu,%pd,%pd\n", 13324b8e9923SAl Viro dir->i_ino, dentry, old_dentry); 13332bad8471SEric Van Hensbergen 1334da977b2cSEric Van Hensbergen oldfid = v9fs_fid_clone(old_dentry); 1335da977b2cSEric Van Hensbergen if (IS_ERR(oldfid)) 1336da977b2cSEric Van Hensbergen return PTR_ERR(oldfid); 13372bad8471SEric Van Hensbergen 133816cce6d2SLatchesar Ionkov sprintf(name, "%d\n", oldfid->fid); 1339bd238fb4SLatchesar Ionkov retval = v9fs_vfs_mkspecial(dir, dentry, P9_DMLINK, name); 1340c06c066aSAneesh Kumar K.V if (!retval) { 13412b0143b5SDavid Howells v9fs_refresh_inode(oldfid, d_inode(old_dentry)); 1342d28c61f0SAneesh Kumar K.V v9fs_invalidate_inode_attr(dir); 1343c06c066aSAneesh Kumar K.V } 1344bd238fb4SLatchesar Ionkov p9_client_clunk(oldfid); 13452bad8471SEric Van Hensbergen return retval; 13462bad8471SEric Van Hensbergen } 13472bad8471SEric Van Hensbergen 13482bad8471SEric Van Hensbergen /** 13492bad8471SEric Van Hensbergen * v9fs_vfs_mknod - create a special file 1350*bc868036SDavid Howells * @mnt_userns: The user namespace of the mount 13512bad8471SEric Van Hensbergen * @dir: inode destination for new link 13522bad8471SEric Van Hensbergen * @dentry: dentry for file 13532bad8471SEric Van Hensbergen * @mode: mode for creation 1354ee443996SEric Van Hensbergen * @rdev: device associated with special file 13552bad8471SEric Van Hensbergen * 13562bad8471SEric Van Hensbergen */ 13572bad8471SEric Van Hensbergen 13582bad8471SEric Van Hensbergen static int 1359549c7297SChristian Brauner v9fs_vfs_mknod(struct user_namespace *mnt_userns, struct inode *dir, 1360549c7297SChristian Brauner struct dentry *dentry, umode_t mode, dev_t rdev) 13612bad8471SEric Van Hensbergen { 1362c2837de7SAl Viro struct v9fs_session_info *v9ses = v9fs_inode2v9ses(dir); 1363531b1094SLatchesar Ionkov int retval; 1364b46c267eSAl Viro char name[2 + U32_MAX_DIGITS + 1 + U32_MAX_DIGITS + 1]; 1365c2837de7SAl Viro u32 perm; 13662bad8471SEric Van Hensbergen 13674b8e9923SAl Viro p9_debug(P9_DEBUG_VFS, " %lu,%pd mode: %hx MAJOR: %u MINOR: %u\n", 13684b8e9923SAl Viro dir->i_ino, dentry, mode, 13695d385153SJoe Perches MAJOR(rdev), MINOR(rdev)); 13702bad8471SEric Van Hensbergen 13712bad8471SEric Van Hensbergen /* build extension */ 13722bad8471SEric Van Hensbergen if (S_ISBLK(mode)) 1373531b1094SLatchesar Ionkov sprintf(name, "b %u %u", MAJOR(rdev), MINOR(rdev)); 13742bad8471SEric Van Hensbergen else if (S_ISCHR(mode)) 1375531b1094SLatchesar Ionkov sprintf(name, "c %u %u", MAJOR(rdev), MINOR(rdev)); 1376b46c267eSAl Viro else 1377531b1094SLatchesar Ionkov *name = 0; 13782bad8471SEric Van Hensbergen 1379c2837de7SAl Viro perm = unixmode2p9mode(v9ses, mode); 1380c2837de7SAl Viro retval = v9fs_vfs_mkspecial(dir, dentry, perm, name); 13812bad8471SEric Van Hensbergen 13822bad8471SEric Van Hensbergen return retval; 13832bad8471SEric Van Hensbergen } 13842bad8471SEric Van Hensbergen 1385b3cbea03SAneesh Kumar K.V int v9fs_refresh_inode(struct p9_fid *fid, struct inode *inode) 1386b3cbea03SAneesh Kumar K.V { 138745089142SAneesh Kumar K.V int umode; 138845089142SAneesh Kumar K.V dev_t rdev; 1389b3cbea03SAneesh Kumar K.V struct p9_wstat *st; 1390b3cbea03SAneesh Kumar K.V struct v9fs_session_info *v9ses; 13915e3cc1eeSHou Tao unsigned int flags; 1392b3cbea03SAneesh Kumar K.V 1393b3cbea03SAneesh Kumar K.V v9ses = v9fs_inode2v9ses(inode); 1394b3cbea03SAneesh Kumar K.V st = p9_client_stat(fid); 1395b3cbea03SAneesh Kumar K.V if (IS_ERR(st)) 1396b3cbea03SAneesh Kumar K.V return PTR_ERR(st); 139745089142SAneesh Kumar K.V /* 139845089142SAneesh Kumar K.V * Don't update inode if the file type is different 139945089142SAneesh Kumar K.V */ 140045089142SAneesh Kumar K.V umode = p9mode2unixmode(v9ses, st, &rdev); 14016e3e2c43SAl Viro if (inode_wrong_type(inode, umode)) 140245089142SAneesh Kumar K.V goto out; 1403b3cbea03SAneesh Kumar K.V 1404b3cbea03SAneesh Kumar K.V /* 1405b3cbea03SAneesh Kumar K.V * We don't want to refresh inode->i_size, 1406b3cbea03SAneesh Kumar K.V * because we may have cached data 1407b3cbea03SAneesh Kumar K.V */ 14085e3cc1eeSHou Tao flags = (v9ses->cache == CACHE_LOOSE || v9ses->cache == CACHE_FSCACHE) ? 14095e3cc1eeSHou Tao V9FS_STAT2INODE_KEEP_ISIZE : 0; 14105e3cc1eeSHou Tao v9fs_stat2inode(st, inode, inode->i_sb, flags); 141145089142SAneesh Kumar K.V out: 1412b3cbea03SAneesh Kumar K.V p9stat_free(st); 1413b3cbea03SAneesh Kumar K.V kfree(st); 1414b3cbea03SAneesh Kumar K.V return 0; 1415b3cbea03SAneesh Kumar K.V } 1416b3cbea03SAneesh Kumar K.V 14179b6533c9SSripathi Kodi static const struct inode_operations v9fs_dir_inode_operations_dotu = { 14189b6533c9SSripathi Kodi .create = v9fs_vfs_create, 14199b6533c9SSripathi Kodi .lookup = v9fs_vfs_lookup, 1420e43ae79cSMiklos Szeredi .atomic_open = v9fs_vfs_atomic_open, 14219b6533c9SSripathi Kodi .symlink = v9fs_vfs_symlink, 142250cc42ffSVenkateswararao Jujjuri (JV) .link = v9fs_vfs_link, 14239b6533c9SSripathi Kodi .unlink = v9fs_vfs_unlink, 14249b6533c9SSripathi Kodi .mkdir = v9fs_vfs_mkdir, 14259b6533c9SSripathi Kodi .rmdir = v9fs_vfs_rmdir, 14261d76e313SAneesh Kumar K.V .mknod = v9fs_vfs_mknod, 14279b6533c9SSripathi Kodi .rename = v9fs_vfs_rename, 14289b6533c9SSripathi Kodi .getattr = v9fs_vfs_getattr, 14299b6533c9SSripathi Kodi .setattr = v9fs_vfs_setattr, 14309b6533c9SSripathi Kodi }; 14319b6533c9SSripathi Kodi 1432754661f1SArjan van de Ven static const struct inode_operations v9fs_dir_inode_operations = { 1433b501611aSEric Van Hensbergen .create = v9fs_vfs_create, 1434b501611aSEric Van Hensbergen .lookup = v9fs_vfs_lookup, 1435e43ae79cSMiklos Szeredi .atomic_open = v9fs_vfs_atomic_open, 1436b501611aSEric Van Hensbergen .unlink = v9fs_vfs_unlink, 1437b501611aSEric Van Hensbergen .mkdir = v9fs_vfs_mkdir, 1438b501611aSEric Van Hensbergen .rmdir = v9fs_vfs_rmdir, 1439b501611aSEric Van Hensbergen .mknod = v9fs_vfs_mknod, 1440b501611aSEric Van Hensbergen .rename = v9fs_vfs_rename, 1441b501611aSEric Van Hensbergen .getattr = v9fs_vfs_getattr, 1442b501611aSEric Van Hensbergen .setattr = v9fs_vfs_setattr, 1443b501611aSEric Van Hensbergen }; 1444b501611aSEric Van Hensbergen 1445754661f1SArjan van de Ven static const struct inode_operations v9fs_file_inode_operations = { 14462bad8471SEric Van Hensbergen .getattr = v9fs_vfs_getattr, 14472bad8471SEric Van Hensbergen .setattr = v9fs_vfs_setattr, 14482bad8471SEric Van Hensbergen }; 14492bad8471SEric Van Hensbergen 1450754661f1SArjan van de Ven static const struct inode_operations v9fs_symlink_inode_operations = { 14516b255391SAl Viro .get_link = v9fs_vfs_get_link, 14522bad8471SEric Van Hensbergen .getattr = v9fs_vfs_getattr, 14532bad8471SEric Van Hensbergen .setattr = v9fs_vfs_setattr, 14542bad8471SEric Van Hensbergen }; 14559b6533c9SSripathi Kodi 1456