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; 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 3465ffc0cb3SAneesh Kumar K.V * 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 /** 37260e78d2cSAbhishek Kulkarni * v9fs_clear_inode - release an inode 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 */ 402fd2421f5SAneesh Kumar K.V if ((inode->i_mode & S_IFMT) != (umode & S_IFMT)) 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 668e43ae79cSMiklos Szeredi * 669e43ae79cSMiklos Szeredi * open(.., O_CREAT) is handled in v9fs_vfs_atomic_open(). This is only called 670e43ae79cSMiklos Szeredi * for mknod(2). 671e43ae79cSMiklos Szeredi * 672ee443996SEric Van Hensbergen * @dir: directory inode that is being created 6732bad8471SEric Van Hensbergen * @dentry: dentry that is being deleted 6746a3124a3SLatchesar Ionkov * @mode: create permissions 6752bad8471SEric Van Hensbergen * 6762bad8471SEric Van Hensbergen */ 6772bad8471SEric Van Hensbergen 6782bad8471SEric Van Hensbergen static int 6794acdaf27SAl Viro v9fs_vfs_create(struct inode *dir, struct dentry *dentry, umode_t mode, 680ebfc3b49SAl Viro bool excl) 6812bad8471SEric Van Hensbergen { 682e43ae79cSMiklos Szeredi struct v9fs_session_info *v9ses = v9fs_inode2v9ses(dir); 683e43ae79cSMiklos Szeredi u32 perm = unixmode2p9mode(v9ses, mode); 684e43ae79cSMiklos Szeredi struct p9_fid *fid; 6856a3124a3SLatchesar Ionkov 686e43ae79cSMiklos Szeredi /* P9_OEXCL? */ 687e43ae79cSMiklos Szeredi fid = v9fs_create(v9ses, dir, dentry, NULL, perm, P9_ORDWR); 688e43ae79cSMiklos Szeredi if (IS_ERR(fid)) 689e43ae79cSMiklos Szeredi return PTR_ERR(fid); 6906a3124a3SLatchesar Ionkov 691d28c61f0SAneesh Kumar K.V v9fs_invalidate_inode_attr(dir); 692bd238fb4SLatchesar Ionkov p9_client_clunk(fid); 6936a3124a3SLatchesar Ionkov 6946a3124a3SLatchesar Ionkov return 0; 6952bad8471SEric Van Hensbergen } 6962bad8471SEric Van Hensbergen 6972bad8471SEric Van Hensbergen /** 6982bad8471SEric Van Hensbergen * v9fs_vfs_mkdir - VFS mkdir hook to create a directory 699ee443996SEric Van Hensbergen * @dir: inode that is being unlinked 7002bad8471SEric Van Hensbergen * @dentry: dentry that is being unlinked 7012bad8471SEric Van Hensbergen * @mode: mode for new directory 7022bad8471SEric Van Hensbergen * 7032bad8471SEric Van Hensbergen */ 7042bad8471SEric Van Hensbergen 70518bb1db3SAl Viro static int v9fs_vfs_mkdir(struct inode *dir, struct dentry *dentry, umode_t mode) 7062bad8471SEric Van Hensbergen { 7076a3124a3SLatchesar Ionkov int err; 708bd238fb4SLatchesar Ionkov u32 perm; 709bd238fb4SLatchesar Ionkov struct p9_fid *fid; 710d28c61f0SAneesh Kumar K.V struct v9fs_session_info *v9ses; 7116a3124a3SLatchesar Ionkov 7124b8e9923SAl Viro p9_debug(P9_DEBUG_VFS, "name %pd\n", dentry); 713bd238fb4SLatchesar Ionkov err = 0; 7146a3124a3SLatchesar Ionkov v9ses = v9fs_inode2v9ses(dir); 7156a3124a3SLatchesar Ionkov perm = unixmode2p9mode(v9ses, mode | S_IFDIR); 716bd238fb4SLatchesar Ionkov fid = v9fs_create(v9ses, dir, dentry, NULL, perm, P9_OREAD); 717bd238fb4SLatchesar Ionkov if (IS_ERR(fid)) { 718bd238fb4SLatchesar Ionkov err = PTR_ERR(fid); 719bd238fb4SLatchesar Ionkov fid = NULL; 720d28c61f0SAneesh Kumar K.V } else { 721b271ec47SAneesh Kumar K.V inc_nlink(dir); 722d28c61f0SAneesh Kumar K.V v9fs_invalidate_inode_attr(dir); 723d28c61f0SAneesh Kumar K.V } 7246a3124a3SLatchesar Ionkov 725bd238fb4SLatchesar Ionkov if (fid) 726bd238fb4SLatchesar Ionkov p9_client_clunk(fid); 7276a3124a3SLatchesar Ionkov 7286a3124a3SLatchesar Ionkov return err; 7292bad8471SEric Van Hensbergen } 7302bad8471SEric Van Hensbergen 7312bad8471SEric Van Hensbergen /** 7322bad8471SEric Van Hensbergen * v9fs_vfs_lookup - VFS lookup hook to "walk" to a new inode 7332bad8471SEric Van Hensbergen * @dir: inode that is being walked from 7342bad8471SEric Van Hensbergen * @dentry: dentry that is being walked to? 735fd2916bdSFabian Frederick * @flags: lookup flags (unused) 7362bad8471SEric Van Hensbergen * 7372bad8471SEric Van Hensbergen */ 7382bad8471SEric Van Hensbergen 73953c06f4eSAneesh Kumar K.V struct dentry *v9fs_vfs_lookup(struct inode *dir, struct dentry *dentry, 74000cd8dd3SAl Viro unsigned int flags) 7412bad8471SEric Van Hensbergen { 74273f50717SAneesh Kumar K.V struct dentry *res; 7432bad8471SEric Van Hensbergen struct v9fs_session_info *v9ses; 744bd238fb4SLatchesar Ionkov struct p9_fid *dfid, *fid; 7452bad8471SEric Van Hensbergen struct inode *inode; 7467880b43bSAl Viro const unsigned char *name; 7472bad8471SEric Van Hensbergen 7484b8e9923SAl Viro p9_debug(P9_DEBUG_VFS, "dir: %p dentry: (%pd) %p flags: %x\n", 7494b8e9923SAl Viro dir, dentry, dentry, flags); 7502bad8471SEric Van Hensbergen 75111e9b49bSSripathi Kodi if (dentry->d_name.len > NAME_MAX) 75211e9b49bSSripathi Kodi return ERR_PTR(-ENAMETOOLONG); 75311e9b49bSSripathi Kodi 7542bad8471SEric Van Hensbergen v9ses = v9fs_inode2v9ses(dir); 755a534c8d1SAneesh Kumar K.V /* We can walk d_parent because we hold the dir->i_mutex */ 75677d5a6b7SAl Viro dfid = v9fs_parent_fid(dentry); 757bd238fb4SLatchesar Ionkov if (IS_ERR(dfid)) 758e231c2eeSDavid Howells return ERR_CAST(dfid); 7592bad8471SEric Van Hensbergen 76073f50717SAneesh Kumar K.V /* 76173f50717SAneesh Kumar K.V * Make sure we don't use a wrong inode due to parallel 76273f50717SAneesh Kumar K.V * unlink. For cached mode create calls request for new 76373f50717SAneesh Kumar K.V * inode. But with cache disabled, lookup should do this. 76473f50717SAneesh Kumar K.V */ 765500e2ab6SAl Viro name = dentry->d_name.name; 766500e2ab6SAl Viro fid = p9_client_walk(dfid, 1, &name, 1); 7676636b6dcSJianyong Wu p9_client_clunk(dfid); 768500e2ab6SAl Viro if (fid == ERR_PTR(-ENOENT)) 769500e2ab6SAl Viro inode = NULL; 770500e2ab6SAl Viro else if (IS_ERR(fid)) 771500e2ab6SAl Viro inode = ERR_CAST(fid); 772500e2ab6SAl Viro else if (v9ses->cache == CACHE_LOOSE || v9ses->cache == CACHE_FSCACHE) 773a78ce05dSAneesh Kumar K.V inode = v9fs_get_inode_from_fid(v9ses, fid, dir->i_sb); 77473f50717SAneesh Kumar K.V else 77573f50717SAneesh Kumar K.V inode = v9fs_get_new_inode_from_fid(v9ses, fid, dir->i_sb); 77673f50717SAneesh Kumar K.V /* 77773f50717SAneesh Kumar K.V * If we had a rename on the server and a parallel lookup 77873f50717SAneesh Kumar K.V * for the new name, then make sure we instantiate with 77973f50717SAneesh Kumar K.V * the new name. ie look up for a/b, while on server somebody 78073f50717SAneesh Kumar K.V * moved b under k and client parallely did a lookup for 78173f50717SAneesh Kumar K.V * k/b. 78273f50717SAneesh Kumar K.V */ 78341d28bcaSAl Viro res = d_splice_alias(inode, dentry); 784500e2ab6SAl Viro if (!IS_ERR(fid)) { 785a3b2157eSAl Viro if (!res) 786a3b2157eSAl Viro v9fs_fid_add(dentry, fid); 787a3b2157eSAl Viro else if (!IS_ERR(res)) 788a3b2157eSAl Viro v9fs_fid_add(res, fid); 789a3b2157eSAl Viro else 790bd238fb4SLatchesar Ionkov p9_client_clunk(fid); 791500e2ab6SAl Viro } 7927b5be621SAl Viro return res; 7932bad8471SEric Van Hensbergen } 7942bad8471SEric Van Hensbergen 795d9585277SAl Viro static int 796e43ae79cSMiklos Szeredi v9fs_vfs_atomic_open(struct inode *dir, struct dentry *dentry, 79744907d79SAl Viro struct file *file, unsigned flags, umode_t mode) 798e43ae79cSMiklos Szeredi { 799e43ae79cSMiklos Szeredi int err; 800e43ae79cSMiklos Szeredi u32 perm; 801e43ae79cSMiklos Szeredi struct v9fs_inode *v9inode; 802e43ae79cSMiklos Szeredi struct v9fs_session_info *v9ses; 803e43ae79cSMiklos Szeredi struct p9_fid *fid, *inode_fid; 804e43ae79cSMiklos Szeredi struct dentry *res = NULL; 805987a6485SGreg Kurz struct inode *inode; 806e43ae79cSMiklos Szeredi 80700699ad8SAl Viro if (d_in_lookup(dentry)) { 80800cd8dd3SAl Viro res = v9fs_vfs_lookup(dir, dentry, 0); 809e43ae79cSMiklos Szeredi if (IS_ERR(res)) 810d9585277SAl Viro return PTR_ERR(res); 811e43ae79cSMiklos Szeredi 812e43ae79cSMiklos Szeredi if (res) 813e43ae79cSMiklos Szeredi dentry = res; 814e43ae79cSMiklos Szeredi } 815e43ae79cSMiklos Szeredi 816e43ae79cSMiklos Szeredi /* Only creates */ 8172b0143b5SDavid Howells if (!(flags & O_CREAT) || d_really_is_positive(dentry)) 818e45198a6SAl Viro return finish_no_open(file, res); 819e43ae79cSMiklos Szeredi 820e43ae79cSMiklos Szeredi err = 0; 821fae74696SGeyslan G. Bem 822e43ae79cSMiklos Szeredi v9ses = v9fs_inode2v9ses(dir); 823e43ae79cSMiklos Szeredi perm = unixmode2p9mode(v9ses, mode); 824e43ae79cSMiklos Szeredi fid = v9fs_create(v9ses, dir, dentry, NULL, perm, 825e43ae79cSMiklos Szeredi v9fs_uflags2omode(flags, 826e43ae79cSMiklos Szeredi v9fs_proto_dotu(v9ses))); 827e43ae79cSMiklos Szeredi if (IS_ERR(fid)) { 828e43ae79cSMiklos Szeredi err = PTR_ERR(fid); 829e43ae79cSMiklos Szeredi fid = NULL; 830e43ae79cSMiklos Szeredi goto error; 831e43ae79cSMiklos Szeredi } 832e43ae79cSMiklos Szeredi 833e43ae79cSMiklos Szeredi v9fs_invalidate_inode_attr(dir); 834987a6485SGreg Kurz inode = d_inode(dentry); 835987a6485SGreg Kurz v9inode = V9FS_I(inode); 836e43ae79cSMiklos Szeredi mutex_lock(&v9inode->v_mutex); 837fb89b45cSDominique Martinet if ((v9ses->cache == CACHE_LOOSE || v9ses->cache == CACHE_FSCACHE) && 838fb89b45cSDominique Martinet !v9inode->writeback_fid && 839e43ae79cSMiklos Szeredi ((flags & O_ACCMODE) != O_RDONLY)) { 840e43ae79cSMiklos Szeredi /* 841e43ae79cSMiklos Szeredi * clone a fid and add it to writeback_fid 842e43ae79cSMiklos Szeredi * we do it during open time instead of 843e43ae79cSMiklos Szeredi * page dirty time via write_begin/page_mkwrite 844e43ae79cSMiklos Szeredi * because we want write after unlink usecase 845e43ae79cSMiklos Szeredi * to work. 846e43ae79cSMiklos Szeredi */ 847e43ae79cSMiklos Szeredi inode_fid = v9fs_writeback_fid(dentry); 848e43ae79cSMiklos Szeredi if (IS_ERR(inode_fid)) { 849e43ae79cSMiklos Szeredi err = PTR_ERR(inode_fid); 850e43ae79cSMiklos Szeredi mutex_unlock(&v9inode->v_mutex); 851e43ae79cSMiklos Szeredi goto error; 852e43ae79cSMiklos Szeredi } 853e43ae79cSMiklos Szeredi v9inode->writeback_fid = (void *) inode_fid; 854e43ae79cSMiklos Szeredi } 855e43ae79cSMiklos Szeredi mutex_unlock(&v9inode->v_mutex); 856be12af3eSAl Viro err = finish_open(file, dentry, generic_file_open); 85730d90494SAl Viro if (err) 858e43ae79cSMiklos Szeredi goto error; 859e43ae79cSMiklos Szeredi 86030d90494SAl Viro file->private_data = fid; 861fb89b45cSDominique Martinet if (v9ses->cache == CACHE_LOOSE || v9ses->cache == CACHE_FSCACHE) 8622b0143b5SDavid Howells v9fs_cache_inode_set_cookie(d_inode(dentry), file); 863987a6485SGreg Kurz v9fs_open_fid_add(inode, fid); 864e43ae79cSMiklos Szeredi 86573a09dd9SAl Viro file->f_mode |= FMODE_CREATED; 866e43ae79cSMiklos Szeredi out: 867e43ae79cSMiklos Szeredi dput(res); 868d9585277SAl Viro return err; 869e43ae79cSMiklos Szeredi 870e43ae79cSMiklos Szeredi error: 871e43ae79cSMiklos Szeredi if (fid) 872e43ae79cSMiklos Szeredi p9_client_clunk(fid); 873e43ae79cSMiklos Szeredi goto out; 874e43ae79cSMiklos Szeredi } 875e43ae79cSMiklos Szeredi 8762bad8471SEric Van Hensbergen /** 8772bad8471SEric Van Hensbergen * v9fs_vfs_unlink - VFS unlink hook to delete an inode 8782bad8471SEric Van Hensbergen * @i: inode that is being unlinked 87973c592b9SEric Van Hensbergen * @d: dentry that is being unlinked 8802bad8471SEric Van Hensbergen * 8812bad8471SEric Van Hensbergen */ 8822bad8471SEric Van Hensbergen 88353c06f4eSAneesh Kumar K.V int v9fs_vfs_unlink(struct inode *i, struct dentry *d) 8842bad8471SEric Van Hensbergen { 8852bad8471SEric Van Hensbergen return v9fs_remove(i, d, 0); 8862bad8471SEric Van Hensbergen } 8872bad8471SEric Van Hensbergen 8882bad8471SEric Van Hensbergen /** 8892bad8471SEric Van Hensbergen * v9fs_vfs_rmdir - VFS unlink hook to delete a directory 8902bad8471SEric Van Hensbergen * @i: inode that is being unlinked 89173c592b9SEric Van Hensbergen * @d: dentry that is being unlinked 8922bad8471SEric Van Hensbergen * 8932bad8471SEric Van Hensbergen */ 8942bad8471SEric Van Hensbergen 89553c06f4eSAneesh Kumar K.V int v9fs_vfs_rmdir(struct inode *i, struct dentry *d) 8962bad8471SEric Van Hensbergen { 89748e370ffSAneesh Kumar K.V return v9fs_remove(i, d, AT_REMOVEDIR); 8982bad8471SEric Van Hensbergen } 8992bad8471SEric Van Hensbergen 9002bad8471SEric Van Hensbergen /** 9012bad8471SEric Van Hensbergen * v9fs_vfs_rename - VFS hook to rename an inode 9022bad8471SEric Van Hensbergen * @old_dir: old dir inode 9032bad8471SEric Van Hensbergen * @old_dentry: old dentry 9042bad8471SEric Van Hensbergen * @new_dir: new dir inode 9052bad8471SEric Van Hensbergen * @new_dentry: new dentry 9062bad8471SEric Van Hensbergen * 9072bad8471SEric Van Hensbergen */ 9082bad8471SEric Van Hensbergen 90953c06f4eSAneesh Kumar K.V int 9102bad8471SEric Van Hensbergen v9fs_vfs_rename(struct inode *old_dir, struct dentry *old_dentry, 9111cd66c93SMiklos Szeredi struct inode *new_dir, struct dentry *new_dentry, 9121cd66c93SMiklos Szeredi unsigned int flags) 9132bad8471SEric Van Hensbergen { 914d28c61f0SAneesh Kumar K.V int retval; 915bd238fb4SLatchesar Ionkov struct inode *old_inode; 916b271ec47SAneesh Kumar K.V struct inode *new_inode; 917bd238fb4SLatchesar Ionkov struct v9fs_session_info *v9ses; 9186636b6dcSJianyong Wu struct p9_fid *oldfid, *dfid; 919bd238fb4SLatchesar Ionkov struct p9_fid *olddirfid; 920bd238fb4SLatchesar Ionkov struct p9_fid *newdirfid; 921bd238fb4SLatchesar Ionkov struct p9_wstat wstat; 9222bad8471SEric Van Hensbergen 9231cd66c93SMiklos Szeredi if (flags) 9241cd66c93SMiklos Szeredi return -EINVAL; 9251cd66c93SMiklos Szeredi 9265d385153SJoe Perches p9_debug(P9_DEBUG_VFS, "\n"); 927bd238fb4SLatchesar Ionkov retval = 0; 9282b0143b5SDavid Howells old_inode = d_inode(old_dentry); 9292b0143b5SDavid Howells new_inode = d_inode(new_dentry); 930bd238fb4SLatchesar Ionkov v9ses = v9fs_inode2v9ses(old_inode); 931bd238fb4SLatchesar Ionkov oldfid = v9fs_fid_lookup(old_dentry); 932da977b2cSEric Van Hensbergen if (IS_ERR(oldfid)) 933da977b2cSEric Van Hensbergen return PTR_ERR(oldfid); 934da977b2cSEric Van Hensbergen 9356636b6dcSJianyong Wu dfid = v9fs_parent_fid(old_dentry); 9366636b6dcSJianyong Wu olddirfid = clone_fid(dfid); 9376636b6dcSJianyong Wu if (dfid && !IS_ERR(dfid)) 9386636b6dcSJianyong Wu p9_client_clunk(dfid); 9396636b6dcSJianyong Wu 940da977b2cSEric Van Hensbergen if (IS_ERR(olddirfid)) { 941da977b2cSEric Van Hensbergen retval = PTR_ERR(olddirfid); 942bd238fb4SLatchesar Ionkov goto done; 943da977b2cSEric Van Hensbergen } 944da977b2cSEric Van Hensbergen 9456636b6dcSJianyong Wu dfid = v9fs_parent_fid(new_dentry); 9466636b6dcSJianyong Wu newdirfid = clone_fid(dfid); 9476636b6dcSJianyong Wu p9_client_clunk(dfid); 9486636b6dcSJianyong Wu 949da977b2cSEric Van Hensbergen if (IS_ERR(newdirfid)) { 950da977b2cSEric Van Hensbergen retval = PTR_ERR(newdirfid); 951bd238fb4SLatchesar Ionkov goto clunk_olddir; 9522bad8471SEric Van Hensbergen } 9532bad8471SEric Van Hensbergen 954a534c8d1SAneesh Kumar K.V down_write(&v9ses->rename_sem); 9554681dbdaSSripathi Kodi if (v9fs_proto_dotl(v9ses)) { 9569e8fb38eSAneesh Kumar K.V retval = p9_client_renameat(olddirfid, old_dentry->d_name.name, 9579e8fb38eSAneesh Kumar K.V newdirfid, new_dentry->d_name.name); 9589e8fb38eSAneesh Kumar K.V if (retval == -EOPNOTSUPP) 9594681dbdaSSripathi Kodi retval = p9_client_rename(oldfid, newdirfid, 9609e8fb38eSAneesh Kumar K.V new_dentry->d_name.name); 9619e8fb38eSAneesh Kumar K.V if (retval != -EOPNOTSUPP) 9624681dbdaSSripathi Kodi goto clunk_newdir; 9634681dbdaSSripathi Kodi } 964a534c8d1SAneesh Kumar K.V if (old_dentry->d_parent != new_dentry->d_parent) { 965a534c8d1SAneesh Kumar K.V /* 966a534c8d1SAneesh Kumar K.V * 9P .u can only handle file rename in the same directory 967a534c8d1SAneesh Kumar K.V */ 9684681dbdaSSripathi Kodi 9695d385153SJoe Perches p9_debug(P9_DEBUG_ERROR, "old dir and new dir are different\n"); 970621997cdSEric Van Hensbergen retval = -EXDEV; 971bd238fb4SLatchesar Ionkov goto clunk_newdir; 9722bad8471SEric Van Hensbergen } 973531b1094SLatchesar Ionkov v9fs_blank_wstat(&wstat); 974ba17674fSLatchesar Ionkov wstat.muid = v9ses->uname; 9757880b43bSAl Viro wstat.name = new_dentry->d_name.name; 976bd238fb4SLatchesar Ionkov retval = p9_client_wstat(oldfid, &wstat); 9772bad8471SEric Van Hensbergen 978bd238fb4SLatchesar Ionkov clunk_newdir: 979b271ec47SAneesh Kumar K.V if (!retval) { 980b271ec47SAneesh Kumar K.V if (new_inode) { 981b271ec47SAneesh Kumar K.V if (S_ISDIR(new_inode->i_mode)) 982b271ec47SAneesh Kumar K.V clear_nlink(new_inode); 983b271ec47SAneesh Kumar K.V else 984ac89b2efSEryu Guan v9fs_dec_count(new_inode); 985b271ec47SAneesh Kumar K.V } 986b271ec47SAneesh Kumar K.V if (S_ISDIR(old_inode->i_mode)) { 987b271ec47SAneesh Kumar K.V if (!new_inode) 988b271ec47SAneesh Kumar K.V inc_nlink(new_dir); 989ac89b2efSEryu Guan v9fs_dec_count(old_dir); 990b271ec47SAneesh Kumar K.V } 9913bc86de3SAneesh Kumar K.V v9fs_invalidate_inode_attr(old_inode); 992d28c61f0SAneesh Kumar K.V v9fs_invalidate_inode_attr(old_dir); 993d28c61f0SAneesh Kumar K.V v9fs_invalidate_inode_attr(new_dir); 9943bc86de3SAneesh Kumar K.V 995a534c8d1SAneesh Kumar K.V /* successful rename */ 996a534c8d1SAneesh Kumar K.V d_move(old_dentry, new_dentry); 997b271ec47SAneesh Kumar K.V } 998a534c8d1SAneesh Kumar K.V up_write(&v9ses->rename_sem); 99922150c4fSLatchesar Ionkov p9_client_clunk(newdirfid); 10002bad8471SEric Van Hensbergen 1001bd238fb4SLatchesar Ionkov clunk_olddir: 100222150c4fSLatchesar Ionkov p9_client_clunk(olddirfid); 10032bad8471SEric Van Hensbergen 1004bd238fb4SLatchesar Ionkov done: 10056636b6dcSJianyong Wu p9_client_clunk(oldfid); 10062bad8471SEric Van Hensbergen return retval; 10072bad8471SEric Van Hensbergen } 10082bad8471SEric Van Hensbergen 10092bad8471SEric Van Hensbergen /** 1010943ffb58SAdrian Bunk * v9fs_vfs_getattr - retrieve file metadata 1011a528d35eSDavid Howells * @path: Object to query 1012ee443996SEric Van Hensbergen * @stat: metadata structure to populate 1013a528d35eSDavid Howells * @request_mask: Mask of STATX_xxx flags indicating the caller's interests 1014a528d35eSDavid Howells * @flags: AT_STATX_xxx setting 10152bad8471SEric Van Hensbergen * 10162bad8471SEric Van Hensbergen */ 10172bad8471SEric Van Hensbergen 10182bad8471SEric Van Hensbergen static int 1019a528d35eSDavid Howells v9fs_vfs_getattr(const struct path *path, struct kstat *stat, 1020a528d35eSDavid Howells u32 request_mask, unsigned int flags) 10212bad8471SEric Van Hensbergen { 1022a528d35eSDavid Howells struct dentry *dentry = path->dentry; 1023bd238fb4SLatchesar Ionkov struct v9fs_session_info *v9ses; 1024bd238fb4SLatchesar Ionkov struct p9_fid *fid; 102551a87c55SEric Van Hensbergen struct p9_wstat *st; 10262bad8471SEric Van Hensbergen 10275d385153SJoe Perches p9_debug(P9_DEBUG_VFS, "dentry: %p\n", dentry); 102842869c8aSAneesh Kumar K.V v9ses = v9fs_dentry2v9ses(dentry); 1029a1211908SAneesh Kumar K.V if (v9ses->cache == CACHE_LOOSE || v9ses->cache == CACHE_FSCACHE) { 10302b0143b5SDavid Howells generic_fillattr(d_inode(dentry), stat); 1031a1211908SAneesh Kumar K.V return 0; 1032a1211908SAneesh Kumar K.V } 1033bd238fb4SLatchesar Ionkov fid = v9fs_fid_lookup(dentry); 1034da977b2cSEric Van Hensbergen if (IS_ERR(fid)) 1035da977b2cSEric Van Hensbergen return PTR_ERR(fid); 10362bad8471SEric Van Hensbergen 1037bd238fb4SLatchesar Ionkov st = p9_client_stat(fid); 10386636b6dcSJianyong Wu p9_client_clunk(fid); 1039bd238fb4SLatchesar Ionkov if (IS_ERR(st)) 1040bd238fb4SLatchesar Ionkov return PTR_ERR(st); 10412bad8471SEric Van Hensbergen 10425e3cc1eeSHou Tao v9fs_stat2inode(st, d_inode(dentry), dentry->d_sb, 0); 10432b0143b5SDavid Howells generic_fillattr(d_inode(dentry), stat); 10442bad8471SEric Van Hensbergen 104562b2be59SLatchesar Ionkov p9stat_free(st); 1046bd238fb4SLatchesar Ionkov kfree(st); 1047bd238fb4SLatchesar Ionkov return 0; 10482bad8471SEric Van Hensbergen } 10492bad8471SEric Van Hensbergen 10502bad8471SEric Van Hensbergen /** 10512bad8471SEric Van Hensbergen * v9fs_vfs_setattr - set file metadata 10522bad8471SEric Van Hensbergen * @dentry: file whose metadata to set 10532bad8471SEric Van Hensbergen * @iattr: metadata assignment structure 10542bad8471SEric Van Hensbergen * 10552bad8471SEric Van Hensbergen */ 10562bad8471SEric Van Hensbergen 10572bad8471SEric Van Hensbergen static int v9fs_vfs_setattr(struct dentry *dentry, struct iattr *iattr) 10582bad8471SEric Van Hensbergen { 10596636b6dcSJianyong Wu int retval, use_dentry = 0; 1060bd238fb4SLatchesar Ionkov struct v9fs_session_info *v9ses; 106166246641SJianyong Wu struct p9_fid *fid = NULL; 1062bd238fb4SLatchesar Ionkov struct p9_wstat wstat; 10632bad8471SEric Van Hensbergen 10645d385153SJoe Perches p9_debug(P9_DEBUG_VFS, "\n"); 106531051c85SJan Kara retval = setattr_prepare(dentry, iattr); 1066059c138bSAneesh Kumar K.V if (retval) 1067059c138bSAneesh Kumar K.V return retval; 1068059c138bSAneesh Kumar K.V 1069bd238fb4SLatchesar Ionkov retval = -EPERM; 107042869c8aSAneesh Kumar K.V v9ses = v9fs_dentry2v9ses(dentry); 107166246641SJianyong Wu if (iattr->ia_valid & ATTR_FILE) { 107266246641SJianyong Wu fid = iattr->ia_file->private_data; 107366246641SJianyong Wu WARN_ON(!fid); 107466246641SJianyong Wu } 10756636b6dcSJianyong Wu if (!fid) { 1076bd238fb4SLatchesar Ionkov fid = v9fs_fid_lookup(dentry); 10776636b6dcSJianyong Wu use_dentry = 1; 10786636b6dcSJianyong Wu } 1079da977b2cSEric Van Hensbergen if(IS_ERR(fid)) 1080da977b2cSEric Van Hensbergen return PTR_ERR(fid); 10812bad8471SEric Van Hensbergen 1082531b1094SLatchesar Ionkov v9fs_blank_wstat(&wstat); 10832bad8471SEric Van Hensbergen if (iattr->ia_valid & ATTR_MODE) 1084531b1094SLatchesar Ionkov wstat.mode = unixmode2p9mode(v9ses, iattr->ia_mode); 10852bad8471SEric Van Hensbergen 10862bad8471SEric Van Hensbergen if (iattr->ia_valid & ATTR_MTIME) 1087531b1094SLatchesar Ionkov wstat.mtime = iattr->ia_mtime.tv_sec; 10882bad8471SEric Van Hensbergen 10892bad8471SEric Van Hensbergen if (iattr->ia_valid & ATTR_ATIME) 1090531b1094SLatchesar Ionkov wstat.atime = iattr->ia_atime.tv_sec; 10912bad8471SEric Van Hensbergen 10922bad8471SEric Van Hensbergen if (iattr->ia_valid & ATTR_SIZE) 1093531b1094SLatchesar Ionkov wstat.length = iattr->ia_size; 10942bad8471SEric Van Hensbergen 1095dd6102fbSSripathi Kodi if (v9fs_proto_dotu(v9ses)) { 1096531b1094SLatchesar Ionkov if (iattr->ia_valid & ATTR_UID) 1097531b1094SLatchesar Ionkov wstat.n_uid = iattr->ia_uid; 10982bad8471SEric Van Hensbergen 1099531b1094SLatchesar Ionkov if (iattr->ia_valid & ATTR_GID) 1100531b1094SLatchesar Ionkov wstat.n_gid = iattr->ia_gid; 11012bad8471SEric Van Hensbergen } 1102059c138bSAneesh Kumar K.V 11033dc5436aSAneesh Kumar K.V /* Write all dirty data */ 1104e36cb0b8SDavid Howells if (d_is_reg(dentry)) 11052b0143b5SDavid Howells filemap_write_and_wait(d_inode(dentry)->i_mapping); 11063dc5436aSAneesh Kumar K.V 1107f10fc50fSAneesh Kumar K.V retval = p9_client_wstat(fid, &wstat); 11086636b6dcSJianyong Wu 11096636b6dcSJianyong Wu if (use_dentry) 11106636b6dcSJianyong Wu p9_client_clunk(fid); 11116636b6dcSJianyong Wu 1112f10fc50fSAneesh Kumar K.V if (retval < 0) 1113f10fc50fSAneesh Kumar K.V return retval; 1114059c138bSAneesh Kumar K.V 1115059c138bSAneesh Kumar K.V if ((iattr->ia_valid & ATTR_SIZE) && 11162b0143b5SDavid Howells iattr->ia_size != i_size_read(d_inode(dentry))) 11172b0143b5SDavid Howells truncate_setsize(d_inode(dentry), iattr->ia_size); 1118059c138bSAneesh Kumar K.V 11192b0143b5SDavid Howells v9fs_invalidate_inode_attr(d_inode(dentry)); 11201025774cSChristoph Hellwig 11212b0143b5SDavid Howells setattr_copy(d_inode(dentry), iattr); 11222b0143b5SDavid Howells mark_inode_dirty(d_inode(dentry)); 11231025774cSChristoph Hellwig return 0; 11242bad8471SEric Van Hensbergen } 11252bad8471SEric Van Hensbergen 11262bad8471SEric Van Hensbergen /** 1127531b1094SLatchesar Ionkov * v9fs_stat2inode - populate an inode structure with mistat info 1128531b1094SLatchesar Ionkov * @stat: Plan 9 metadata (mistat) structure 11292bad8471SEric Van Hensbergen * @inode: inode to populate 11302bad8471SEric Van Hensbergen * @sb: superblock of filesystem 11315e3cc1eeSHou Tao * @flags: control flags (e.g. V9FS_STAT2INODE_KEEP_ISIZE) 11322bad8471SEric Van Hensbergen * 11332bad8471SEric Van Hensbergen */ 11342bad8471SEric Van Hensbergen 11352bad8471SEric Van Hensbergen void 113651a87c55SEric Van Hensbergen v9fs_stat2inode(struct p9_wstat *stat, struct inode *inode, 11375e3cc1eeSHou Tao struct super_block *sb, unsigned int flags) 11382bad8471SEric Van Hensbergen { 11393eda0de6SAl Viro umode_t mode; 11402bad8471SEric Van Hensbergen struct v9fs_session_info *v9ses = sb->s_fs_info; 1141b3cbea03SAneesh Kumar K.V struct v9fs_inode *v9inode = V9FS_I(inode); 11422bad8471SEric Van Hensbergen 1143bfe86848SMiklos Szeredi set_nlink(inode, 1); 11442bad8471SEric Van Hensbergen 1145531b1094SLatchesar Ionkov inode->i_atime.tv_sec = stat->atime; 1146531b1094SLatchesar Ionkov inode->i_mtime.tv_sec = stat->mtime; 1147531b1094SLatchesar Ionkov inode->i_ctime.tv_sec = stat->mtime; 11482bad8471SEric Van Hensbergen 1149bd32b82dSLatchesar Ionkov inode->i_uid = v9ses->dfltuid; 1150bd32b82dSLatchesar Ionkov inode->i_gid = v9ses->dfltgid; 11512bad8471SEric Van Hensbergen 1152dd6102fbSSripathi Kodi if (v9fs_proto_dotu(v9ses)) { 1153531b1094SLatchesar Ionkov inode->i_uid = stat->n_uid; 1154531b1094SLatchesar Ionkov inode->i_gid = stat->n_gid; 1155531b1094SLatchesar Ionkov } 11565717144aSAneesh Kumar K.V if ((S_ISREG(inode->i_mode)) || (S_ISDIR(inode->i_mode))) { 1157*9652c732SAl Viro if (v9fs_proto_dotu(v9ses)) { 1158*9652c732SAl Viro unsigned int i_nlink; 11595717144aSAneesh Kumar K.V /* 1160*9652c732SAl Viro * Hadlink support got added later to the .u extension. 1161*9652c732SAl Viro * So there can be a server out there that doesn't 1162*9652c732SAl Viro * support this even with .u extension. That would 1163*9652c732SAl Viro * just leave us with stat->extension being an empty 1164*9652c732SAl Viro * string, though. 11655717144aSAneesh Kumar K.V */ 11665717144aSAneesh Kumar K.V /* HARDLINKCOUNT %u */ 1167*9652c732SAl Viro if (sscanf(stat->extension, 1168*9652c732SAl Viro " HARDLINKCOUNT %u", &i_nlink) == 1) 1169bfe86848SMiklos Szeredi set_nlink(inode, i_nlink); 11705717144aSAneesh Kumar K.V } 11715717144aSAneesh Kumar K.V } 1172df345c67SAneesh Kumar K.V mode = p9mode2perm(v9ses, stat); 117345089142SAneesh Kumar K.V mode |= inode->i_mode & ~S_IALLUGO; 117445089142SAneesh Kumar K.V inode->i_mode = mode; 11752bad8471SEric Van Hensbergen 11765e3cc1eeSHou Tao if (!(flags & V9FS_STAT2INODE_KEEP_ISIZE)) 11775e3cc1eeSHou Tao v9fs_i_size_write(inode, stat->length); 1178bd238fb4SLatchesar Ionkov /* not real number of blocks, but 512 byte ones ... */ 11795e3cc1eeSHou Tao inode->i_blocks = (stat->length + 512 - 1) >> 9; 1180b3cbea03SAneesh Kumar K.V v9inode->cache_validity &= ~V9FS_INO_INVALID_ATTR; 11812bad8471SEric Van Hensbergen } 11822bad8471SEric Van Hensbergen 11832bad8471SEric Van Hensbergen /** 11842bad8471SEric Van Hensbergen * v9fs_qid2ino - convert qid into inode number 11852bad8471SEric Van Hensbergen * @qid: qid to hash 11862bad8471SEric Van Hensbergen * 11872bad8471SEric Van Hensbergen * BUG: potential for inode number collisions? 11882bad8471SEric Van Hensbergen */ 11892bad8471SEric Van Hensbergen 1190bd238fb4SLatchesar Ionkov ino_t v9fs_qid2ino(struct p9_qid *qid) 11912bad8471SEric Van Hensbergen { 11922bad8471SEric Van Hensbergen u64 path = qid->path + 2; 11932bad8471SEric Van Hensbergen ino_t i = 0; 11942bad8471SEric Van Hensbergen 11952bad8471SEric Van Hensbergen if (sizeof(ino_t) == sizeof(path)) 11962bad8471SEric Van Hensbergen memcpy(&i, &path, sizeof(ino_t)); 11972bad8471SEric Van Hensbergen else 11982bad8471SEric Van Hensbergen i = (ino_t) (path ^ (path >> 32)); 11992bad8471SEric Van Hensbergen 12002bad8471SEric Van Hensbergen return i; 12012bad8471SEric Van Hensbergen } 12022bad8471SEric Van Hensbergen 12032bad8471SEric Van Hensbergen /** 12046b255391SAl Viro * v9fs_vfs_get_link - follow a symlink path 12052bad8471SEric Van Hensbergen * @dentry: dentry for symlink 12066b255391SAl Viro * @inode: inode for symlink 1207fceef393SAl Viro * @done: delayed call for when we are done with the return value 12082bad8471SEric Van Hensbergen */ 12092bad8471SEric Van Hensbergen 12106b255391SAl Viro static const char *v9fs_vfs_get_link(struct dentry *dentry, 1211fceef393SAl Viro struct inode *inode, 1212fceef393SAl Viro struct delayed_call *done) 12132bad8471SEric Van Hensbergen { 12146b255391SAl Viro struct v9fs_session_info *v9ses; 12156b255391SAl Viro struct p9_fid *fid; 121690e4fc88SAl Viro struct p9_wstat *st; 1217680baacbSAl Viro char *res; 12182bad8471SEric Van Hensbergen 12196b255391SAl Viro if (!dentry) 12206b255391SAl Viro return ERR_PTR(-ECHILD); 12216b255391SAl Viro 12226b255391SAl Viro v9ses = v9fs_dentry2v9ses(dentry); 12236b255391SAl Viro fid = v9fs_fid_lookup(dentry); 12244b8e9923SAl Viro p9_debug(P9_DEBUG_VFS, "%pd\n", dentry); 12252bad8471SEric Van Hensbergen 122690e4fc88SAl Viro if (IS_ERR(fid)) 122790e4fc88SAl Viro return ERR_CAST(fid); 12282bad8471SEric Van Hensbergen 122990e4fc88SAl Viro if (!v9fs_proto_dotu(v9ses)) 123090e4fc88SAl Viro return ERR_PTR(-EBADF); 123190e4fc88SAl Viro 123290e4fc88SAl Viro st = p9_client_stat(fid); 12336636b6dcSJianyong Wu p9_client_clunk(fid); 123490e4fc88SAl Viro if (IS_ERR(st)) 123590e4fc88SAl Viro return ERR_CAST(st); 123690e4fc88SAl Viro 123790e4fc88SAl Viro if (!(st->mode & P9_DMSYMLINK)) { 123890e4fc88SAl Viro p9stat_free(st); 123990e4fc88SAl Viro kfree(st); 124090e4fc88SAl Viro return ERR_PTR(-EINVAL); 12412bad8471SEric Van Hensbergen } 1242680baacbSAl Viro res = st->extension; 124390e4fc88SAl Viro st->extension = NULL; 1244680baacbSAl Viro if (strlen(res) >= PATH_MAX) 1245680baacbSAl Viro res[PATH_MAX - 1] = '\0'; 1246680baacbSAl Viro 124790e4fc88SAl Viro p9stat_free(st); 124890e4fc88SAl Viro kfree(st); 1249fceef393SAl Viro set_delayed_call(done, kfree_link, res); 1250fceef393SAl Viro return res; 12512bad8471SEric Van Hensbergen } 12522bad8471SEric Van Hensbergen 12532bad8471SEric Van Hensbergen /** 1254ee443996SEric Van Hensbergen * v9fs_vfs_mkspecial - create a special file 1255ee443996SEric Van Hensbergen * @dir: inode to create special file in 1256ee443996SEric Van Hensbergen * @dentry: dentry to create 1257fd2916bdSFabian Frederick * @perm: mode to create special file 1258ee443996SEric Van Hensbergen * @extension: 9p2000.u format extension string representing special file 1259ee443996SEric Van Hensbergen * 1260ee443996SEric Van Hensbergen */ 1261ee443996SEric Van Hensbergen 1262531b1094SLatchesar Ionkov static int v9fs_vfs_mkspecial(struct inode *dir, struct dentry *dentry, 1263c2837de7SAl Viro u32 perm, const char *extension) 1264531b1094SLatchesar Ionkov { 1265bd238fb4SLatchesar Ionkov struct p9_fid *fid; 1266d28c61f0SAneesh Kumar K.V struct v9fs_session_info *v9ses; 1267531b1094SLatchesar Ionkov 12686a3124a3SLatchesar Ionkov v9ses = v9fs_inode2v9ses(dir); 1269dd6102fbSSripathi Kodi if (!v9fs_proto_dotu(v9ses)) { 12705d385153SJoe Perches p9_debug(P9_DEBUG_ERROR, "not extended\n"); 12716a3124a3SLatchesar Ionkov return -EPERM; 1272531b1094SLatchesar Ionkov } 1273531b1094SLatchesar Ionkov 1274bd238fb4SLatchesar Ionkov fid = v9fs_create(v9ses, dir, dentry, (char *) extension, perm, 1275bd238fb4SLatchesar Ionkov P9_OREAD); 1276bd238fb4SLatchesar Ionkov if (IS_ERR(fid)) 1277bd238fb4SLatchesar Ionkov return PTR_ERR(fid); 1278da977b2cSEric Van Hensbergen 1279d28c61f0SAneesh Kumar K.V v9fs_invalidate_inode_attr(dir); 1280bd238fb4SLatchesar Ionkov p9_client_clunk(fid); 12816a3124a3SLatchesar Ionkov return 0; 1282531b1094SLatchesar Ionkov } 1283531b1094SLatchesar Ionkov 1284531b1094SLatchesar Ionkov /** 1285531b1094SLatchesar Ionkov * v9fs_vfs_symlink - helper function to create symlinks 1286531b1094SLatchesar Ionkov * @dir: directory inode containing symlink 1287531b1094SLatchesar Ionkov * @dentry: dentry for symlink 1288531b1094SLatchesar Ionkov * @symname: symlink data 1289531b1094SLatchesar Ionkov * 1290ee443996SEric Van Hensbergen * See Also: 9P2000.u RFC for more information 1291531b1094SLatchesar Ionkov * 1292531b1094SLatchesar Ionkov */ 1293531b1094SLatchesar Ionkov 1294531b1094SLatchesar Ionkov static int 1295531b1094SLatchesar Ionkov v9fs_vfs_symlink(struct inode *dir, struct dentry *dentry, const char *symname) 1296531b1094SLatchesar Ionkov { 12974b8e9923SAl Viro p9_debug(P9_DEBUG_VFS, " %lu,%pd,%s\n", 12984b8e9923SAl Viro dir->i_ino, dentry, symname); 1299531b1094SLatchesar Ionkov 1300c2837de7SAl Viro return v9fs_vfs_mkspecial(dir, dentry, P9_DMSYMLINK, symname); 1301531b1094SLatchesar Ionkov } 1302531b1094SLatchesar Ionkov 1303b46c267eSAl Viro #define U32_MAX_DIGITS 10 1304b46c267eSAl Viro 13052bad8471SEric Van Hensbergen /** 13062bad8471SEric Van Hensbergen * v9fs_vfs_link - create a hardlink 13072bad8471SEric Van Hensbergen * @old_dentry: dentry for file to link to 13082bad8471SEric Van Hensbergen * @dir: inode destination for new link 130973c592b9SEric Van Hensbergen * @dentry: dentry for link 13102bad8471SEric Van Hensbergen * 13112bad8471SEric Van Hensbergen */ 13122bad8471SEric Van Hensbergen 13132bad8471SEric Van Hensbergen static int 13142bad8471SEric Van Hensbergen v9fs_vfs_link(struct dentry *old_dentry, struct inode *dir, 13152bad8471SEric Van Hensbergen struct dentry *dentry) 13162bad8471SEric Van Hensbergen { 1317531b1094SLatchesar Ionkov int retval; 1318b46c267eSAl Viro char name[1 + U32_MAX_DIGITS + 2]; /* sign + number + \n + \0 */ 1319d28c61f0SAneesh Kumar K.V struct p9_fid *oldfid; 13202bad8471SEric Van Hensbergen 13214b8e9923SAl Viro p9_debug(P9_DEBUG_VFS, " %lu,%pd,%pd\n", 13224b8e9923SAl Viro dir->i_ino, dentry, old_dentry); 13232bad8471SEric Van Hensbergen 1324da977b2cSEric Van Hensbergen oldfid = v9fs_fid_clone(old_dentry); 1325da977b2cSEric Van Hensbergen if (IS_ERR(oldfid)) 1326da977b2cSEric Van Hensbergen return PTR_ERR(oldfid); 13272bad8471SEric Van Hensbergen 132816cce6d2SLatchesar Ionkov sprintf(name, "%d\n", oldfid->fid); 1329bd238fb4SLatchesar Ionkov retval = v9fs_vfs_mkspecial(dir, dentry, P9_DMLINK, name); 1330c06c066aSAneesh Kumar K.V if (!retval) { 13312b0143b5SDavid Howells v9fs_refresh_inode(oldfid, d_inode(old_dentry)); 1332d28c61f0SAneesh Kumar K.V v9fs_invalidate_inode_attr(dir); 1333c06c066aSAneesh Kumar K.V } 1334bd238fb4SLatchesar Ionkov p9_client_clunk(oldfid); 13352bad8471SEric Van Hensbergen return retval; 13362bad8471SEric Van Hensbergen } 13372bad8471SEric Van Hensbergen 13382bad8471SEric Van Hensbergen /** 13392bad8471SEric Van Hensbergen * v9fs_vfs_mknod - create a special file 13402bad8471SEric Van Hensbergen * @dir: inode destination for new link 13412bad8471SEric Van Hensbergen * @dentry: dentry for file 13422bad8471SEric Van Hensbergen * @mode: mode for creation 1343ee443996SEric Van Hensbergen * @rdev: device associated with special file 13442bad8471SEric Van Hensbergen * 13452bad8471SEric Van Hensbergen */ 13462bad8471SEric Van Hensbergen 13472bad8471SEric Van Hensbergen static int 13481a67aafbSAl Viro v9fs_vfs_mknod(struct inode *dir, struct dentry *dentry, umode_t mode, dev_t rdev) 13492bad8471SEric Van Hensbergen { 1350c2837de7SAl Viro struct v9fs_session_info *v9ses = v9fs_inode2v9ses(dir); 1351531b1094SLatchesar Ionkov int retval; 1352b46c267eSAl Viro char name[2 + U32_MAX_DIGITS + 1 + U32_MAX_DIGITS + 1]; 1353c2837de7SAl Viro u32 perm; 13542bad8471SEric Van Hensbergen 13554b8e9923SAl Viro p9_debug(P9_DEBUG_VFS, " %lu,%pd mode: %hx MAJOR: %u MINOR: %u\n", 13564b8e9923SAl Viro dir->i_ino, dentry, mode, 13575d385153SJoe Perches MAJOR(rdev), MINOR(rdev)); 13582bad8471SEric Van Hensbergen 13592bad8471SEric Van Hensbergen /* build extension */ 13602bad8471SEric Van Hensbergen if (S_ISBLK(mode)) 1361531b1094SLatchesar Ionkov sprintf(name, "b %u %u", MAJOR(rdev), MINOR(rdev)); 13622bad8471SEric Van Hensbergen else if (S_ISCHR(mode)) 1363531b1094SLatchesar Ionkov sprintf(name, "c %u %u", MAJOR(rdev), MINOR(rdev)); 1364b46c267eSAl Viro else 1365531b1094SLatchesar Ionkov *name = 0; 13662bad8471SEric Van Hensbergen 1367c2837de7SAl Viro perm = unixmode2p9mode(v9ses, mode); 1368c2837de7SAl Viro retval = v9fs_vfs_mkspecial(dir, dentry, perm, name); 13692bad8471SEric Van Hensbergen 13702bad8471SEric Van Hensbergen return retval; 13712bad8471SEric Van Hensbergen } 13722bad8471SEric Van Hensbergen 1373b3cbea03SAneesh Kumar K.V int v9fs_refresh_inode(struct p9_fid *fid, struct inode *inode) 1374b3cbea03SAneesh Kumar K.V { 137545089142SAneesh Kumar K.V int umode; 137645089142SAneesh Kumar K.V dev_t rdev; 1377b3cbea03SAneesh Kumar K.V struct p9_wstat *st; 1378b3cbea03SAneesh Kumar K.V struct v9fs_session_info *v9ses; 13795e3cc1eeSHou Tao unsigned int flags; 1380b3cbea03SAneesh Kumar K.V 1381b3cbea03SAneesh Kumar K.V v9ses = v9fs_inode2v9ses(inode); 1382b3cbea03SAneesh Kumar K.V st = p9_client_stat(fid); 1383b3cbea03SAneesh Kumar K.V if (IS_ERR(st)) 1384b3cbea03SAneesh Kumar K.V return PTR_ERR(st); 138545089142SAneesh Kumar K.V /* 138645089142SAneesh Kumar K.V * Don't update inode if the file type is different 138745089142SAneesh Kumar K.V */ 138845089142SAneesh Kumar K.V umode = p9mode2unixmode(v9ses, st, &rdev); 138945089142SAneesh Kumar K.V if ((inode->i_mode & S_IFMT) != (umode & S_IFMT)) 139045089142SAneesh Kumar K.V goto out; 1391b3cbea03SAneesh Kumar K.V 1392b3cbea03SAneesh Kumar K.V /* 1393b3cbea03SAneesh Kumar K.V * We don't want to refresh inode->i_size, 1394b3cbea03SAneesh Kumar K.V * because we may have cached data 1395b3cbea03SAneesh Kumar K.V */ 13965e3cc1eeSHou Tao flags = (v9ses->cache == CACHE_LOOSE || v9ses->cache == CACHE_FSCACHE) ? 13975e3cc1eeSHou Tao V9FS_STAT2INODE_KEEP_ISIZE : 0; 13985e3cc1eeSHou Tao v9fs_stat2inode(st, inode, inode->i_sb, flags); 139945089142SAneesh Kumar K.V out: 1400b3cbea03SAneesh Kumar K.V p9stat_free(st); 1401b3cbea03SAneesh Kumar K.V kfree(st); 1402b3cbea03SAneesh Kumar K.V return 0; 1403b3cbea03SAneesh Kumar K.V } 1404b3cbea03SAneesh Kumar K.V 14059b6533c9SSripathi Kodi static const struct inode_operations v9fs_dir_inode_operations_dotu = { 14069b6533c9SSripathi Kodi .create = v9fs_vfs_create, 14079b6533c9SSripathi Kodi .lookup = v9fs_vfs_lookup, 1408e43ae79cSMiklos Szeredi .atomic_open = v9fs_vfs_atomic_open, 14099b6533c9SSripathi Kodi .symlink = v9fs_vfs_symlink, 141050cc42ffSVenkateswararao Jujjuri (JV) .link = v9fs_vfs_link, 14119b6533c9SSripathi Kodi .unlink = v9fs_vfs_unlink, 14129b6533c9SSripathi Kodi .mkdir = v9fs_vfs_mkdir, 14139b6533c9SSripathi Kodi .rmdir = v9fs_vfs_rmdir, 14141d76e313SAneesh Kumar K.V .mknod = v9fs_vfs_mknod, 14159b6533c9SSripathi Kodi .rename = v9fs_vfs_rename, 14169b6533c9SSripathi Kodi .getattr = v9fs_vfs_getattr, 14179b6533c9SSripathi Kodi .setattr = v9fs_vfs_setattr, 14189b6533c9SSripathi Kodi }; 14199b6533c9SSripathi Kodi 1420754661f1SArjan van de Ven static const struct inode_operations v9fs_dir_inode_operations = { 1421b501611aSEric Van Hensbergen .create = v9fs_vfs_create, 1422b501611aSEric Van Hensbergen .lookup = v9fs_vfs_lookup, 1423e43ae79cSMiklos Szeredi .atomic_open = v9fs_vfs_atomic_open, 1424b501611aSEric Van Hensbergen .unlink = v9fs_vfs_unlink, 1425b501611aSEric Van Hensbergen .mkdir = v9fs_vfs_mkdir, 1426b501611aSEric Van Hensbergen .rmdir = v9fs_vfs_rmdir, 1427b501611aSEric Van Hensbergen .mknod = v9fs_vfs_mknod, 1428b501611aSEric Van Hensbergen .rename = v9fs_vfs_rename, 1429b501611aSEric Van Hensbergen .getattr = v9fs_vfs_getattr, 1430b501611aSEric Van Hensbergen .setattr = v9fs_vfs_setattr, 1431b501611aSEric Van Hensbergen }; 1432b501611aSEric Van Hensbergen 1433754661f1SArjan van de Ven static const struct inode_operations v9fs_file_inode_operations = { 14342bad8471SEric Van Hensbergen .getattr = v9fs_vfs_getattr, 14352bad8471SEric Van Hensbergen .setattr = v9fs_vfs_setattr, 14362bad8471SEric Van Hensbergen }; 14372bad8471SEric Van Hensbergen 1438754661f1SArjan van de Ven static const struct inode_operations v9fs_symlink_inode_operations = { 14396b255391SAl Viro .get_link = v9fs_vfs_get_link, 14402bad8471SEric Van Hensbergen .getattr = v9fs_vfs_getattr, 14412bad8471SEric Van Hensbergen .setattr = v9fs_vfs_setattr, 14422bad8471SEric Van Hensbergen }; 14439b6533c9SSripathi Kodi 1444