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); 14645089142SAneesh Kumar K.V }; 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; 226a78ce05dSAneesh Kumar K.V v9inode = (struct v9fs_inode *)kmem_cache_alloc(v9fs_inode_cache, 22760e78d2cSAbhishek Kulkarni GFP_KERNEL); 228a78ce05dSAneesh Kumar K.V if (!v9inode) 22960e78d2cSAbhishek Kulkarni return NULL; 230a78ce05dSAneesh Kumar K.V #ifdef CONFIG_9P_FSCACHE 231a78ce05dSAneesh Kumar K.V v9inode->fscache = NULL; 2328f5fed1eSSasha Levin mutex_init(&v9inode->fscache_lock); 233a78ce05dSAneesh Kumar K.V #endif 2346b39f6d2SAneesh Kumar K.V v9inode->writeback_fid = NULL; 235b3cbea03SAneesh Kumar K.V v9inode->cache_validity = 0; 2365a7e0a8cSAneesh Kumar K.V mutex_init(&v9inode->v_mutex); 237a78ce05dSAneesh Kumar K.V return &v9inode->vfs_inode; 23860e78d2cSAbhishek Kulkarni } 23960e78d2cSAbhishek Kulkarni 24060e78d2cSAbhishek Kulkarni /** 2415e8a0770SAl Viro * v9fs_free_inode - destroy an inode 24260e78d2cSAbhishek Kulkarni * 24360e78d2cSAbhishek Kulkarni */ 24460e78d2cSAbhishek Kulkarni 2455e8a0770SAl Viro void v9fs_free_inode(struct inode *inode) 246fa0d7e3dSNick Piggin { 247a78ce05dSAneesh Kumar K.V kmem_cache_free(v9fs_inode_cache, V9FS_I(inode)); 248fa0d7e3dSNick Piggin } 249fa0d7e3dSNick Piggin 2505ffc0cb3SAneesh Kumar K.V int v9fs_init_inode(struct v9fs_session_info *v9ses, 2513eda0de6SAl Viro struct inode *inode, umode_t mode, dev_t rdev) 2522bad8471SEric Van Hensbergen { 2535ffc0cb3SAneesh Kumar K.V int err = 0; 2542bb54115SAbhishek Kulkarni 255217f206dSDmitry Monakhov inode_init_owner(inode, NULL, mode); 2562bad8471SEric Van Hensbergen inode->i_blocks = 0; 25745089142SAneesh Kumar K.V inode->i_rdev = rdev; 258078cd827SDeepa Dinamani inode->i_atime = inode->i_mtime = inode->i_ctime = current_time(inode); 259147b31cfSEric Van Hensbergen inode->i_mapping->a_ops = &v9fs_addr_operations; 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 371bd238fb4SLatchesar Ionkov /* 3726a3124a3SLatchesar Ionkov static struct v9fs_fid* 3736a3124a3SLatchesar Ionkov v9fs_clone_walk(struct v9fs_session_info *v9ses, u32 fid, struct dentry *dentry) 3746a3124a3SLatchesar Ionkov { 3756a3124a3SLatchesar Ionkov int err; 376736c4b85SMika Kukkonen int nfid; 3776a3124a3SLatchesar Ionkov struct v9fs_fid *ret; 3786a3124a3SLatchesar Ionkov struct v9fs_fcall *fcall; 3790b8dd177SLatchesar Ionkov 3806a3124a3SLatchesar Ionkov nfid = v9fs_get_idpool(&v9ses->fidpool); 3816a3124a3SLatchesar Ionkov if (nfid < 0) { 3820b8dd177SLatchesar Ionkov eprintk(KERN_WARNING, "no free fids available\n"); 383731805b4SLatchesar Ionkov return ERR_PTR(-ENOSPC); 3840b8dd177SLatchesar Ionkov } 3850b8dd177SLatchesar Ionkov 3866a3124a3SLatchesar Ionkov err = v9fs_t_walk(v9ses, fid, nfid, (char *) dentry->d_name.name, 3876a3124a3SLatchesar Ionkov &fcall); 3886a3124a3SLatchesar Ionkov 3896a3124a3SLatchesar Ionkov if (err < 0) { 39041e5a6acSLatchesar Ionkov if (fcall && fcall->id == RWALK) 39141e5a6acSLatchesar Ionkov goto clunk_fid; 39241e5a6acSLatchesar Ionkov 3936a3124a3SLatchesar Ionkov PRINT_FCALL_ERROR("walk error", fcall); 3946a3124a3SLatchesar Ionkov v9fs_put_idpool(nfid, &v9ses->fidpool); 3956a3124a3SLatchesar Ionkov goto error; 3960b8dd177SLatchesar Ionkov } 3976a3124a3SLatchesar Ionkov 3983cf6429aSLatchesar Ionkov kfree(fcall); 3993cf6429aSLatchesar Ionkov fcall = NULL; 4006a3124a3SLatchesar Ionkov ret = v9fs_fid_create(v9ses, nfid); 4016a3124a3SLatchesar Ionkov if (!ret) { 4026a3124a3SLatchesar Ionkov err = -ENOMEM; 4036a3124a3SLatchesar Ionkov goto clunk_fid; 4040b8dd177SLatchesar Ionkov } 4052bad8471SEric Van Hensbergen 4066a3124a3SLatchesar Ionkov err = v9fs_fid_insert(ret, dentry); 4076a3124a3SLatchesar Ionkov if (err < 0) { 4086a3124a3SLatchesar Ionkov v9fs_fid_destroy(ret); 4096a3124a3SLatchesar Ionkov goto clunk_fid; 4106a3124a3SLatchesar Ionkov } 4112bad8471SEric Van Hensbergen 4126a3124a3SLatchesar Ionkov return ret; 4136a3124a3SLatchesar Ionkov 4146a3124a3SLatchesar Ionkov clunk_fid: 4156a3124a3SLatchesar Ionkov v9fs_t_clunk(v9ses, nfid); 4166a3124a3SLatchesar Ionkov 4176a3124a3SLatchesar Ionkov error: 4186a3124a3SLatchesar Ionkov kfree(fcall); 4196a3124a3SLatchesar Ionkov return ERR_PTR(err); 4206a3124a3SLatchesar Ionkov } 421bd238fb4SLatchesar Ionkov */ 4226a3124a3SLatchesar Ionkov 42360e78d2cSAbhishek Kulkarni 42460e78d2cSAbhishek Kulkarni /** 42560e78d2cSAbhishek Kulkarni * v9fs_clear_inode - release an inode 42660e78d2cSAbhishek Kulkarni * @inode: inode to release 42760e78d2cSAbhishek Kulkarni * 42860e78d2cSAbhishek Kulkarni */ 429b57922d9SAl Viro void v9fs_evict_inode(struct inode *inode) 43060e78d2cSAbhishek Kulkarni { 4316b39f6d2SAneesh Kumar K.V struct v9fs_inode *v9inode = V9FS_I(inode); 4326b39f6d2SAneesh Kumar K.V 4334ad78628SAl Viro truncate_inode_pages_final(&inode->i_data); 434dbd5768fSJan Kara clear_inode(inode); 4354ad78628SAl Viro filemap_fdatawrite(&inode->i_data); 43660e78d2cSAbhishek Kulkarni 43760e78d2cSAbhishek Kulkarni v9fs_cache_inode_put_cookie(inode); 4386b39f6d2SAneesh Kumar K.V /* clunk the fid stashed in writeback_fid */ 4396b39f6d2SAneesh Kumar K.V if (v9inode->writeback_fid) { 4406b39f6d2SAneesh Kumar K.V p9_client_clunk(v9inode->writeback_fid); 4416b39f6d2SAneesh Kumar K.V v9inode->writeback_fid = NULL; 4423cf387d7SAneesh Kumar K.V } 44360e78d2cSAbhishek Kulkarni } 44460e78d2cSAbhishek Kulkarni 445fd2421f5SAneesh Kumar K.V static int v9fs_test_inode(struct inode *inode, void *data) 446fd2421f5SAneesh Kumar K.V { 447fd2421f5SAneesh Kumar K.V int umode; 44845089142SAneesh Kumar K.V dev_t rdev; 449fd2421f5SAneesh Kumar K.V struct v9fs_inode *v9inode = V9FS_I(inode); 450fd2421f5SAneesh Kumar K.V struct p9_wstat *st = (struct p9_wstat *)data; 451fd2421f5SAneesh Kumar K.V struct v9fs_session_info *v9ses = v9fs_inode2v9ses(inode); 452fd2421f5SAneesh Kumar K.V 45345089142SAneesh Kumar K.V umode = p9mode2unixmode(v9ses, st, &rdev); 454fd2421f5SAneesh Kumar K.V /* don't match inode of different type */ 455fd2421f5SAneesh Kumar K.V if ((inode->i_mode & S_IFMT) != (umode & S_IFMT)) 456fd2421f5SAneesh Kumar K.V return 0; 457fd2421f5SAneesh Kumar K.V 458fd2421f5SAneesh Kumar K.V /* compare qid details */ 459fd2421f5SAneesh Kumar K.V if (memcmp(&v9inode->qid.version, 460fd2421f5SAneesh Kumar K.V &st->qid.version, sizeof(v9inode->qid.version))) 461fd2421f5SAneesh Kumar K.V return 0; 462fd2421f5SAneesh Kumar K.V 463fd2421f5SAneesh Kumar K.V if (v9inode->qid.type != st->qid.type) 464fd2421f5SAneesh Kumar K.V return 0; 4658ee03163STuomas Tynkkynen 4668ee03163STuomas Tynkkynen if (v9inode->qid.path != st->qid.path) 4678ee03163STuomas Tynkkynen return 0; 468fd2421f5SAneesh Kumar K.V return 1; 469fd2421f5SAneesh Kumar K.V } 470fd2421f5SAneesh Kumar K.V 471ed80fcfaSAneesh Kumar K.V static int v9fs_test_new_inode(struct inode *inode, void *data) 472ed80fcfaSAneesh Kumar K.V { 473ed80fcfaSAneesh Kumar K.V return 0; 474ed80fcfaSAneesh Kumar K.V } 475ed80fcfaSAneesh Kumar K.V 476fd2421f5SAneesh Kumar K.V static int v9fs_set_inode(struct inode *inode, void *data) 477fd2421f5SAneesh Kumar K.V { 478fd2421f5SAneesh Kumar K.V struct v9fs_inode *v9inode = V9FS_I(inode); 479fd2421f5SAneesh Kumar K.V struct p9_wstat *st = (struct p9_wstat *)data; 480fd2421f5SAneesh Kumar K.V 481fd2421f5SAneesh Kumar K.V memcpy(&v9inode->qid, &st->qid, sizeof(st->qid)); 482fd2421f5SAneesh Kumar K.V return 0; 483fd2421f5SAneesh Kumar K.V } 484fd2421f5SAneesh Kumar K.V 4855ffc0cb3SAneesh Kumar K.V static struct inode *v9fs_qid_iget(struct super_block *sb, 4865ffc0cb3SAneesh Kumar K.V struct p9_qid *qid, 487ed80fcfaSAneesh Kumar K.V struct p9_wstat *st, 488ed80fcfaSAneesh Kumar K.V int new) 4895ffc0cb3SAneesh Kumar K.V { 49045089142SAneesh Kumar K.V dev_t rdev; 4913eda0de6SAl Viro int retval; 4923eda0de6SAl Viro umode_t umode; 4935ffc0cb3SAneesh Kumar K.V unsigned long i_ino; 4945ffc0cb3SAneesh Kumar K.V struct inode *inode; 4955ffc0cb3SAneesh Kumar K.V struct v9fs_session_info *v9ses = sb->s_fs_info; 496ed80fcfaSAneesh Kumar K.V int (*test)(struct inode *, void *); 497ed80fcfaSAneesh Kumar K.V 498ed80fcfaSAneesh Kumar K.V if (new) 499ed80fcfaSAneesh Kumar K.V test = v9fs_test_new_inode; 500ed80fcfaSAneesh Kumar K.V else 501ed80fcfaSAneesh Kumar K.V test = v9fs_test_inode; 5025ffc0cb3SAneesh Kumar K.V 5035ffc0cb3SAneesh Kumar K.V i_ino = v9fs_qid2ino(qid); 504ed80fcfaSAneesh Kumar K.V inode = iget5_locked(sb, i_ino, test, v9fs_set_inode, st); 5055ffc0cb3SAneesh Kumar K.V if (!inode) 5065ffc0cb3SAneesh Kumar K.V return ERR_PTR(-ENOMEM); 5075ffc0cb3SAneesh Kumar K.V if (!(inode->i_state & I_NEW)) 5085ffc0cb3SAneesh Kumar K.V return inode; 5095ffc0cb3SAneesh Kumar K.V /* 5105ffc0cb3SAneesh Kumar K.V * initialize the inode with the stat info 5115ffc0cb3SAneesh Kumar K.V * FIXME!! we may need support for stale inodes 5125ffc0cb3SAneesh Kumar K.V * later. 5135ffc0cb3SAneesh Kumar K.V */ 514fd2421f5SAneesh Kumar K.V inode->i_ino = i_ino; 51545089142SAneesh Kumar K.V umode = p9mode2unixmode(v9ses, st, &rdev); 51645089142SAneesh Kumar K.V retval = v9fs_init_inode(v9ses, inode, umode, rdev); 5175ffc0cb3SAneesh Kumar K.V if (retval) 5185ffc0cb3SAneesh Kumar K.V goto error; 5195ffc0cb3SAneesh Kumar K.V 5205e3cc1eeSHou Tao v9fs_stat2inode(st, inode, sb, 0); 5215ffc0cb3SAneesh Kumar K.V v9fs_cache_inode_get_cookie(inode); 5225ffc0cb3SAneesh Kumar K.V unlock_new_inode(inode); 5235ffc0cb3SAneesh Kumar K.V return inode; 5245ffc0cb3SAneesh Kumar K.V error: 5250a73d0a2SAl Viro iget_failed(inode); 5265ffc0cb3SAneesh Kumar K.V return ERR_PTR(retval); 5275ffc0cb3SAneesh Kumar K.V 5285ffc0cb3SAneesh Kumar K.V } 5295ffc0cb3SAneesh Kumar K.V 53053c06f4eSAneesh Kumar K.V struct inode * 531a78ce05dSAneesh Kumar K.V v9fs_inode_from_fid(struct v9fs_session_info *v9ses, struct p9_fid *fid, 532ed80fcfaSAneesh Kumar K.V struct super_block *sb, int new) 5336a3124a3SLatchesar Ionkov { 53451a87c55SEric Van Hensbergen struct p9_wstat *st; 5355ffc0cb3SAneesh Kumar K.V struct inode *inode = NULL; 5366a3124a3SLatchesar Ionkov 537bd238fb4SLatchesar Ionkov st = p9_client_stat(fid); 53802bc3567SAbhishek Kulkarni if (IS_ERR(st)) 53902bc3567SAbhishek Kulkarni return ERR_CAST(st); 5402bad8471SEric Van Hensbergen 541ed80fcfaSAneesh Kumar K.V inode = v9fs_qid_iget(sb, &st->qid, st, new); 54202bc3567SAbhishek Kulkarni p9stat_free(st); 543bd238fb4SLatchesar Ionkov kfree(st); 5445ffc0cb3SAneesh Kumar K.V return inode; 5452bad8471SEric Van Hensbergen } 5462bad8471SEric Van Hensbergen 5472bad8471SEric Van Hensbergen /** 548f88657ceSAneesh Kumar K.V * v9fs_at_to_dotl_flags- convert Linux specific AT flags to 549f88657ceSAneesh Kumar K.V * plan 9 AT flag. 550f88657ceSAneesh Kumar K.V * @flags: flags to convert 551f88657ceSAneesh Kumar K.V */ 552f88657ceSAneesh Kumar K.V static int v9fs_at_to_dotl_flags(int flags) 553f88657ceSAneesh Kumar K.V { 554f88657ceSAneesh Kumar K.V int rflags = 0; 555f88657ceSAneesh Kumar K.V if (flags & AT_REMOVEDIR) 556f88657ceSAneesh Kumar K.V rflags |= P9_DOTL_AT_REMOVEDIR; 557f88657ceSAneesh Kumar K.V return rflags; 558f88657ceSAneesh Kumar K.V } 559f88657ceSAneesh Kumar K.V 560f88657ceSAneesh Kumar K.V /** 561ac89b2efSEryu Guan * v9fs_dec_count - helper functon to drop i_nlink. 562ac89b2efSEryu Guan * 563ac89b2efSEryu Guan * If a directory had nlink <= 2 (including . and ..), then we should not drop 564ac89b2efSEryu Guan * the link count, which indicates the underlying exported fs doesn't maintain 565ac89b2efSEryu Guan * nlink accurately. e.g. 566ac89b2efSEryu Guan * - overlayfs sets nlink to 1 for merged dir 567ac89b2efSEryu Guan * - ext4 (with dir_nlink feature enabled) sets nlink to 1 if a dir has more 568ac89b2efSEryu Guan * than EXT4_LINK_MAX (65000) links. 569ac89b2efSEryu Guan * 570ac89b2efSEryu Guan * @inode: inode whose nlink is being dropped 571ac89b2efSEryu Guan */ 572ac89b2efSEryu Guan static void v9fs_dec_count(struct inode *inode) 573ac89b2efSEryu Guan { 574ac89b2efSEryu Guan if (!S_ISDIR(inode->i_mode) || inode->i_nlink > 2) 575ac89b2efSEryu Guan drop_nlink(inode); 576ac89b2efSEryu Guan } 577ac89b2efSEryu Guan 578ac89b2efSEryu Guan /** 5792bad8471SEric Van Hensbergen * v9fs_remove - helper function to remove files and directories 58073c592b9SEric Van Hensbergen * @dir: directory inode that is being deleted 58148e370ffSAneesh Kumar K.V * @dentry: dentry that is being deleted 582fd2916bdSFabian Frederick * @flags: removing a directory 5832bad8471SEric Van Hensbergen * 5842bad8471SEric Van Hensbergen */ 5852bad8471SEric Van Hensbergen 58648e370ffSAneesh Kumar K.V static int v9fs_remove(struct inode *dir, struct dentry *dentry, int flags) 5872bad8471SEric Van Hensbergen { 58848e370ffSAneesh Kumar K.V struct inode *inode; 58948e370ffSAneesh Kumar K.V int retval = -EOPNOTSUPP; 59048e370ffSAneesh Kumar K.V struct p9_fid *v9fid, *dfid; 59148e370ffSAneesh Kumar K.V struct v9fs_session_info *v9ses; 5922bad8471SEric Van Hensbergen 5935d385153SJoe Perches p9_debug(P9_DEBUG_VFS, "inode: %p dentry: %p rmdir: %x\n", 59448e370ffSAneesh Kumar K.V dir, dentry, flags); 5952bad8471SEric Van Hensbergen 59648e370ffSAneesh Kumar K.V v9ses = v9fs_inode2v9ses(dir); 5972b0143b5SDavid Howells inode = d_inode(dentry); 59877d5a6b7SAl Viro dfid = v9fs_parent_fid(dentry); 59948e370ffSAneesh Kumar K.V if (IS_ERR(dfid)) { 60048e370ffSAneesh Kumar K.V retval = PTR_ERR(dfid); 6015d385153SJoe Perches p9_debug(P9_DEBUG_VFS, "fid lookup failed %d\n", retval); 60248e370ffSAneesh Kumar K.V return retval; 60348e370ffSAneesh Kumar K.V } 60448e370ffSAneesh Kumar K.V if (v9fs_proto_dotl(v9ses)) 605f88657ceSAneesh Kumar K.V retval = p9_client_unlinkat(dfid, dentry->d_name.name, 606f88657ceSAneesh Kumar K.V v9fs_at_to_dotl_flags(flags)); 60748e370ffSAneesh Kumar K.V if (retval == -EOPNOTSUPP) { 60848e370ffSAneesh Kumar K.V /* Try the one based on path */ 60948e370ffSAneesh Kumar K.V v9fid = v9fs_fid_clone(dentry); 610da977b2cSEric Van Hensbergen if (IS_ERR(v9fid)) 611da977b2cSEric Van Hensbergen return PTR_ERR(v9fid); 612d994f405SAneesh Kumar K.V retval = p9_client_remove(v9fid); 61348e370ffSAneesh Kumar K.V } 614b271ec47SAneesh Kumar K.V if (!retval) { 615b271ec47SAneesh Kumar K.V /* 616b271ec47SAneesh Kumar K.V * directories on unlink should have zero 617b271ec47SAneesh Kumar K.V * link count 618b271ec47SAneesh Kumar K.V */ 61948e370ffSAneesh Kumar K.V if (flags & AT_REMOVEDIR) { 62048e370ffSAneesh Kumar K.V clear_nlink(inode); 621ac89b2efSEryu Guan v9fs_dec_count(dir); 622b271ec47SAneesh Kumar K.V } else 623ac89b2efSEryu Guan v9fs_dec_count(inode); 624d28c61f0SAneesh Kumar K.V 62548e370ffSAneesh Kumar K.V v9fs_invalidate_inode_attr(inode); 626d28c61f0SAneesh Kumar K.V v9fs_invalidate_inode_attr(dir); 627b271ec47SAneesh Kumar K.V } 628d994f405SAneesh Kumar K.V return retval; 6292bad8471SEric Van Hensbergen } 6302bad8471SEric Van Hensbergen 631bd238fb4SLatchesar Ionkov /** 632bd238fb4SLatchesar Ionkov * v9fs_create - Create a file 633ee443996SEric Van Hensbergen * @v9ses: session information 634ee443996SEric Van Hensbergen * @dir: directory that dentry is being created in 635bd238fb4SLatchesar Ionkov * @dentry: dentry that is being created 6360e15597eSAbhishek Kulkarni * @extension: 9p2000.u extension string to support devices, etc. 637bd238fb4SLatchesar Ionkov * @perm: create permissions 638bd238fb4SLatchesar Ionkov * @mode: open mode 639bd238fb4SLatchesar Ionkov * 640bd238fb4SLatchesar Ionkov */ 641bd238fb4SLatchesar Ionkov static struct p9_fid * 642bd238fb4SLatchesar Ionkov v9fs_create(struct v9fs_session_info *v9ses, struct inode *dir, 643bd238fb4SLatchesar Ionkov struct dentry *dentry, char *extension, u32 perm, u8 mode) 644bd238fb4SLatchesar Ionkov { 645bd238fb4SLatchesar Ionkov int err; 6467880b43bSAl Viro const unsigned char *name; 647bd238fb4SLatchesar Ionkov struct p9_fid *dfid, *ofid, *fid; 648bd238fb4SLatchesar Ionkov struct inode *inode; 649bd238fb4SLatchesar Ionkov 6504b8e9923SAl Viro p9_debug(P9_DEBUG_VFS, "name %pd\n", dentry); 65151a87c55SEric Van Hensbergen 652bd238fb4SLatchesar Ionkov err = 0; 653bd238fb4SLatchesar Ionkov ofid = NULL; 654bd238fb4SLatchesar Ionkov fid = NULL; 6557880b43bSAl Viro name = dentry->d_name.name; 65677d5a6b7SAl Viro dfid = v9fs_parent_fid(dentry); 657bd238fb4SLatchesar Ionkov if (IS_ERR(dfid)) { 658bd238fb4SLatchesar Ionkov err = PTR_ERR(dfid); 6595d385153SJoe Perches p9_debug(P9_DEBUG_VFS, "fid lookup failed %d\n", err); 6606d27e64dSVenkateswararao Jujjuri return ERR_PTR(err); 661bd238fb4SLatchesar Ionkov } 662bd238fb4SLatchesar Ionkov 663bd238fb4SLatchesar Ionkov /* clone a fid to use for creation */ 6647d50a29fSAl Viro ofid = clone_fid(dfid); 665bd238fb4SLatchesar Ionkov if (IS_ERR(ofid)) { 666bd238fb4SLatchesar Ionkov err = PTR_ERR(ofid); 6675d385153SJoe Perches p9_debug(P9_DEBUG_VFS, "p9_client_walk failed %d\n", err); 6686d27e64dSVenkateswararao Jujjuri return ERR_PTR(err); 669bd238fb4SLatchesar Ionkov } 670bd238fb4SLatchesar Ionkov 671bd238fb4SLatchesar Ionkov err = p9_client_fcreate(ofid, name, perm, mode, extension); 67251a87c55SEric Van Hensbergen if (err < 0) { 6735d385153SJoe Perches p9_debug(P9_DEBUG_VFS, "p9_client_fcreate failed %d\n", err); 674bd238fb4SLatchesar Ionkov goto error; 67551a87c55SEric Van Hensbergen } 676bd238fb4SLatchesar Ionkov 677b6054793SAneesh Kumar K.V if (!(perm & P9_DMLINK)) { 678bd238fb4SLatchesar Ionkov /* now walk from the parent so we can get unopened fid */ 6796d27e64dSVenkateswararao Jujjuri fid = p9_client_walk(dfid, 1, &name, 1); 680bd238fb4SLatchesar Ionkov if (IS_ERR(fid)) { 681bd238fb4SLatchesar Ionkov err = PTR_ERR(fid); 682b6054793SAneesh Kumar K.V p9_debug(P9_DEBUG_VFS, 683b6054793SAneesh Kumar K.V "p9_client_walk failed %d\n", err); 684bd238fb4SLatchesar Ionkov fid = NULL; 685bd238fb4SLatchesar Ionkov goto error; 6866d27e64dSVenkateswararao Jujjuri } 687b6054793SAneesh Kumar K.V /* 688b6054793SAneesh Kumar K.V * instantiate inode and assign the unopened fid to the dentry 689b6054793SAneesh Kumar K.V */ 690ed80fcfaSAneesh Kumar K.V inode = v9fs_get_new_inode_from_fid(v9ses, fid, dir->i_sb); 691bd238fb4SLatchesar Ionkov if (IS_ERR(inode)) { 692bd238fb4SLatchesar Ionkov err = PTR_ERR(inode); 693b6054793SAneesh Kumar K.V p9_debug(P9_DEBUG_VFS, 694b6054793SAneesh Kumar K.V "inode creation failed %d\n", err); 695bd238fb4SLatchesar Ionkov goto error; 696bd238fb4SLatchesar Ionkov } 6972ea03e1dSAl Viro v9fs_fid_add(dentry, fid); 6985441ae5eSAneesh Kumar K.V d_instantiate(dentry, inode); 699b6054793SAneesh Kumar K.V } 700bd238fb4SLatchesar Ionkov return ofid; 701bd238fb4SLatchesar Ionkov error: 702bd238fb4SLatchesar Ionkov if (ofid) 703bd238fb4SLatchesar Ionkov p9_client_clunk(ofid); 704bd238fb4SLatchesar Ionkov 705bd238fb4SLatchesar Ionkov if (fid) 706bd238fb4SLatchesar Ionkov p9_client_clunk(fid); 707bd238fb4SLatchesar Ionkov 708bd238fb4SLatchesar Ionkov return ERR_PTR(err); 709bd238fb4SLatchesar Ionkov } 710bd238fb4SLatchesar Ionkov 7112bad8471SEric Van Hensbergen /** 712e43ae79cSMiklos Szeredi * v9fs_vfs_create - VFS hook to create a regular file 713e43ae79cSMiklos Szeredi * 714e43ae79cSMiklos Szeredi * open(.., O_CREAT) is handled in v9fs_vfs_atomic_open(). This is only called 715e43ae79cSMiklos Szeredi * for mknod(2). 716e43ae79cSMiklos Szeredi * 717ee443996SEric Van Hensbergen * @dir: directory inode that is being created 7182bad8471SEric Van Hensbergen * @dentry: dentry that is being deleted 7196a3124a3SLatchesar Ionkov * @mode: create permissions 7202bad8471SEric Van Hensbergen * 7212bad8471SEric Van Hensbergen */ 7222bad8471SEric Van Hensbergen 7232bad8471SEric Van Hensbergen static int 7244acdaf27SAl Viro v9fs_vfs_create(struct inode *dir, struct dentry *dentry, umode_t mode, 725ebfc3b49SAl Viro bool excl) 7262bad8471SEric Van Hensbergen { 727e43ae79cSMiklos Szeredi struct v9fs_session_info *v9ses = v9fs_inode2v9ses(dir); 728e43ae79cSMiklos Szeredi u32 perm = unixmode2p9mode(v9ses, mode); 729e43ae79cSMiklos Szeredi struct p9_fid *fid; 7306a3124a3SLatchesar Ionkov 731e43ae79cSMiklos Szeredi /* P9_OEXCL? */ 732e43ae79cSMiklos Szeredi fid = v9fs_create(v9ses, dir, dentry, NULL, perm, P9_ORDWR); 733e43ae79cSMiklos Szeredi if (IS_ERR(fid)) 734e43ae79cSMiklos Szeredi return PTR_ERR(fid); 7356a3124a3SLatchesar Ionkov 736d28c61f0SAneesh Kumar K.V v9fs_invalidate_inode_attr(dir); 737bd238fb4SLatchesar Ionkov p9_client_clunk(fid); 7386a3124a3SLatchesar Ionkov 7396a3124a3SLatchesar Ionkov return 0; 7402bad8471SEric Van Hensbergen } 7412bad8471SEric Van Hensbergen 7422bad8471SEric Van Hensbergen /** 7432bad8471SEric Van Hensbergen * v9fs_vfs_mkdir - VFS mkdir hook to create a directory 744ee443996SEric Van Hensbergen * @dir: inode that is being unlinked 7452bad8471SEric Van Hensbergen * @dentry: dentry that is being unlinked 7462bad8471SEric Van Hensbergen * @mode: mode for new directory 7472bad8471SEric Van Hensbergen * 7482bad8471SEric Van Hensbergen */ 7492bad8471SEric Van Hensbergen 75018bb1db3SAl Viro static int v9fs_vfs_mkdir(struct inode *dir, struct dentry *dentry, umode_t mode) 7512bad8471SEric Van Hensbergen { 7526a3124a3SLatchesar Ionkov int err; 753bd238fb4SLatchesar Ionkov u32 perm; 754bd238fb4SLatchesar Ionkov struct p9_fid *fid; 755d28c61f0SAneesh Kumar K.V struct v9fs_session_info *v9ses; 7566a3124a3SLatchesar Ionkov 7574b8e9923SAl Viro p9_debug(P9_DEBUG_VFS, "name %pd\n", dentry); 758bd238fb4SLatchesar Ionkov err = 0; 7596a3124a3SLatchesar Ionkov v9ses = v9fs_inode2v9ses(dir); 7606a3124a3SLatchesar Ionkov perm = unixmode2p9mode(v9ses, mode | S_IFDIR); 761bd238fb4SLatchesar Ionkov fid = v9fs_create(v9ses, dir, dentry, NULL, perm, P9_OREAD); 762bd238fb4SLatchesar Ionkov if (IS_ERR(fid)) { 763bd238fb4SLatchesar Ionkov err = PTR_ERR(fid); 764bd238fb4SLatchesar Ionkov fid = NULL; 765d28c61f0SAneesh Kumar K.V } else { 766b271ec47SAneesh Kumar K.V inc_nlink(dir); 767d28c61f0SAneesh Kumar K.V v9fs_invalidate_inode_attr(dir); 768d28c61f0SAneesh Kumar K.V } 7696a3124a3SLatchesar Ionkov 770bd238fb4SLatchesar Ionkov if (fid) 771bd238fb4SLatchesar Ionkov p9_client_clunk(fid); 7726a3124a3SLatchesar Ionkov 7736a3124a3SLatchesar Ionkov return err; 7742bad8471SEric Van Hensbergen } 7752bad8471SEric Van Hensbergen 7762bad8471SEric Van Hensbergen /** 7772bad8471SEric Van Hensbergen * v9fs_vfs_lookup - VFS lookup hook to "walk" to a new inode 7782bad8471SEric Van Hensbergen * @dir: inode that is being walked from 7792bad8471SEric Van Hensbergen * @dentry: dentry that is being walked to? 780fd2916bdSFabian Frederick * @flags: lookup flags (unused) 7812bad8471SEric Van Hensbergen * 7822bad8471SEric Van Hensbergen */ 7832bad8471SEric Van Hensbergen 78453c06f4eSAneesh Kumar K.V struct dentry *v9fs_vfs_lookup(struct inode *dir, struct dentry *dentry, 78500cd8dd3SAl Viro unsigned int flags) 7862bad8471SEric Van Hensbergen { 78773f50717SAneesh Kumar K.V struct dentry *res; 7882bad8471SEric Van Hensbergen struct v9fs_session_info *v9ses; 789bd238fb4SLatchesar Ionkov struct p9_fid *dfid, *fid; 7902bad8471SEric Van Hensbergen struct inode *inode; 7917880b43bSAl Viro const unsigned char *name; 7922bad8471SEric Van Hensbergen 7934b8e9923SAl Viro p9_debug(P9_DEBUG_VFS, "dir: %p dentry: (%pd) %p flags: %x\n", 7944b8e9923SAl Viro dir, dentry, dentry, flags); 7952bad8471SEric Van Hensbergen 79611e9b49bSSripathi Kodi if (dentry->d_name.len > NAME_MAX) 79711e9b49bSSripathi Kodi return ERR_PTR(-ENAMETOOLONG); 79811e9b49bSSripathi Kodi 7992bad8471SEric Van Hensbergen v9ses = v9fs_inode2v9ses(dir); 800a534c8d1SAneesh Kumar K.V /* We can walk d_parent because we hold the dir->i_mutex */ 80177d5a6b7SAl Viro dfid = v9fs_parent_fid(dentry); 802bd238fb4SLatchesar Ionkov if (IS_ERR(dfid)) 803e231c2eeSDavid Howells return ERR_CAST(dfid); 8042bad8471SEric Van Hensbergen 80573f50717SAneesh Kumar K.V /* 80673f50717SAneesh Kumar K.V * Make sure we don't use a wrong inode due to parallel 80773f50717SAneesh Kumar K.V * unlink. For cached mode create calls request for new 80873f50717SAneesh Kumar K.V * inode. But with cache disabled, lookup should do this. 80973f50717SAneesh Kumar K.V */ 810500e2ab6SAl Viro name = dentry->d_name.name; 811500e2ab6SAl Viro fid = p9_client_walk(dfid, 1, &name, 1); 812500e2ab6SAl Viro if (fid == ERR_PTR(-ENOENT)) 813500e2ab6SAl Viro inode = NULL; 814500e2ab6SAl Viro else if (IS_ERR(fid)) 815500e2ab6SAl Viro inode = ERR_CAST(fid); 816500e2ab6SAl Viro else if (v9ses->cache == CACHE_LOOSE || v9ses->cache == CACHE_FSCACHE) 817a78ce05dSAneesh Kumar K.V inode = v9fs_get_inode_from_fid(v9ses, fid, dir->i_sb); 81873f50717SAneesh Kumar K.V else 81973f50717SAneesh Kumar K.V inode = v9fs_get_new_inode_from_fid(v9ses, fid, dir->i_sb); 82073f50717SAneesh Kumar K.V /* 82173f50717SAneesh Kumar K.V * If we had a rename on the server and a parallel lookup 82273f50717SAneesh Kumar K.V * for the new name, then make sure we instantiate with 82373f50717SAneesh Kumar K.V * the new name. ie look up for a/b, while on server somebody 82473f50717SAneesh Kumar K.V * moved b under k and client parallely did a lookup for 82573f50717SAneesh Kumar K.V * k/b. 82673f50717SAneesh Kumar K.V */ 82741d28bcaSAl Viro res = d_splice_alias(inode, dentry); 828500e2ab6SAl Viro if (!IS_ERR(fid)) { 829a3b2157eSAl Viro if (!res) 830a3b2157eSAl Viro v9fs_fid_add(dentry, fid); 831a3b2157eSAl Viro else if (!IS_ERR(res)) 832a3b2157eSAl Viro v9fs_fid_add(res, fid); 833a3b2157eSAl Viro else 834bd238fb4SLatchesar Ionkov p9_client_clunk(fid); 835500e2ab6SAl Viro } 8367b5be621SAl Viro return res; 8372bad8471SEric Van Hensbergen } 8382bad8471SEric Van Hensbergen 839d9585277SAl Viro static int 840e43ae79cSMiklos Szeredi v9fs_vfs_atomic_open(struct inode *dir, struct dentry *dentry, 84144907d79SAl Viro struct file *file, unsigned flags, umode_t mode) 842e43ae79cSMiklos Szeredi { 843e43ae79cSMiklos Szeredi int err; 844e43ae79cSMiklos Szeredi u32 perm; 845e43ae79cSMiklos Szeredi struct v9fs_inode *v9inode; 846e43ae79cSMiklos Szeredi struct v9fs_session_info *v9ses; 847e43ae79cSMiklos Szeredi struct p9_fid *fid, *inode_fid; 848e43ae79cSMiklos Szeredi struct dentry *res = NULL; 849e43ae79cSMiklos Szeredi 85000699ad8SAl Viro if (d_in_lookup(dentry)) { 85100cd8dd3SAl Viro res = v9fs_vfs_lookup(dir, dentry, 0); 852e43ae79cSMiklos Szeredi if (IS_ERR(res)) 853d9585277SAl Viro return PTR_ERR(res); 854e43ae79cSMiklos Szeredi 855e43ae79cSMiklos Szeredi if (res) 856e43ae79cSMiklos Szeredi dentry = res; 857e43ae79cSMiklos Szeredi } 858e43ae79cSMiklos Szeredi 859e43ae79cSMiklos Szeredi /* Only creates */ 8602b0143b5SDavid Howells if (!(flags & O_CREAT) || d_really_is_positive(dentry)) 861e45198a6SAl Viro return finish_no_open(file, res); 862e43ae79cSMiklos Szeredi 863e43ae79cSMiklos Szeredi err = 0; 864fae74696SGeyslan G. Bem 865e43ae79cSMiklos Szeredi v9ses = v9fs_inode2v9ses(dir); 866e43ae79cSMiklos Szeredi perm = unixmode2p9mode(v9ses, mode); 867e43ae79cSMiklos Szeredi fid = v9fs_create(v9ses, dir, dentry, NULL, perm, 868e43ae79cSMiklos Szeredi v9fs_uflags2omode(flags, 869e43ae79cSMiklos Szeredi v9fs_proto_dotu(v9ses))); 870e43ae79cSMiklos Szeredi if (IS_ERR(fid)) { 871e43ae79cSMiklos Szeredi err = PTR_ERR(fid); 872e43ae79cSMiklos Szeredi fid = NULL; 873e43ae79cSMiklos Szeredi goto error; 874e43ae79cSMiklos Szeredi } 875e43ae79cSMiklos Szeredi 876e43ae79cSMiklos Szeredi v9fs_invalidate_inode_attr(dir); 8772b0143b5SDavid Howells v9inode = V9FS_I(d_inode(dentry)); 878e43ae79cSMiklos Szeredi mutex_lock(&v9inode->v_mutex); 879fb89b45cSDominique Martinet if ((v9ses->cache == CACHE_LOOSE || v9ses->cache == CACHE_FSCACHE) && 880fb89b45cSDominique Martinet !v9inode->writeback_fid && 881e43ae79cSMiklos Szeredi ((flags & O_ACCMODE) != O_RDONLY)) { 882e43ae79cSMiklos Szeredi /* 883e43ae79cSMiklos Szeredi * clone a fid and add it to writeback_fid 884e43ae79cSMiklos Szeredi * we do it during open time instead of 885e43ae79cSMiklos Szeredi * page dirty time via write_begin/page_mkwrite 886e43ae79cSMiklos Szeredi * because we want write after unlink usecase 887e43ae79cSMiklos Szeredi * to work. 888e43ae79cSMiklos Szeredi */ 889e43ae79cSMiklos Szeredi inode_fid = v9fs_writeback_fid(dentry); 890e43ae79cSMiklos Szeredi if (IS_ERR(inode_fid)) { 891e43ae79cSMiklos Szeredi err = PTR_ERR(inode_fid); 892e43ae79cSMiklos Szeredi mutex_unlock(&v9inode->v_mutex); 893e43ae79cSMiklos Szeredi goto error; 894e43ae79cSMiklos Szeredi } 895e43ae79cSMiklos Szeredi v9inode->writeback_fid = (void *) inode_fid; 896e43ae79cSMiklos Szeredi } 897e43ae79cSMiklos Szeredi mutex_unlock(&v9inode->v_mutex); 898be12af3eSAl Viro err = finish_open(file, dentry, generic_file_open); 89930d90494SAl Viro if (err) 900e43ae79cSMiklos Szeredi goto error; 901e43ae79cSMiklos Szeredi 90230d90494SAl Viro file->private_data = fid; 903fb89b45cSDominique Martinet if (v9ses->cache == CACHE_LOOSE || v9ses->cache == CACHE_FSCACHE) 9042b0143b5SDavid Howells v9fs_cache_inode_set_cookie(d_inode(dentry), file); 905e43ae79cSMiklos Szeredi 90673a09dd9SAl Viro file->f_mode |= FMODE_CREATED; 907e43ae79cSMiklos Szeredi out: 908e43ae79cSMiklos Szeredi dput(res); 909d9585277SAl Viro return err; 910e43ae79cSMiklos Szeredi 911e43ae79cSMiklos Szeredi error: 912e43ae79cSMiklos Szeredi if (fid) 913e43ae79cSMiklos Szeredi p9_client_clunk(fid); 914e43ae79cSMiklos Szeredi goto out; 915e43ae79cSMiklos Szeredi } 916e43ae79cSMiklos Szeredi 9172bad8471SEric Van Hensbergen /** 9182bad8471SEric Van Hensbergen * v9fs_vfs_unlink - VFS unlink hook to delete an inode 9192bad8471SEric Van Hensbergen * @i: inode that is being unlinked 92073c592b9SEric Van Hensbergen * @d: dentry that is being unlinked 9212bad8471SEric Van Hensbergen * 9222bad8471SEric Van Hensbergen */ 9232bad8471SEric Van Hensbergen 92453c06f4eSAneesh Kumar K.V int v9fs_vfs_unlink(struct inode *i, struct dentry *d) 9252bad8471SEric Van Hensbergen { 9262bad8471SEric Van Hensbergen return v9fs_remove(i, d, 0); 9272bad8471SEric Van Hensbergen } 9282bad8471SEric Van Hensbergen 9292bad8471SEric Van Hensbergen /** 9302bad8471SEric Van Hensbergen * v9fs_vfs_rmdir - VFS unlink hook to delete a directory 9312bad8471SEric Van Hensbergen * @i: inode that is being unlinked 93273c592b9SEric Van Hensbergen * @d: dentry that is being unlinked 9332bad8471SEric Van Hensbergen * 9342bad8471SEric Van Hensbergen */ 9352bad8471SEric Van Hensbergen 93653c06f4eSAneesh Kumar K.V int v9fs_vfs_rmdir(struct inode *i, struct dentry *d) 9372bad8471SEric Van Hensbergen { 93848e370ffSAneesh Kumar K.V return v9fs_remove(i, d, AT_REMOVEDIR); 9392bad8471SEric Van Hensbergen } 9402bad8471SEric Van Hensbergen 9412bad8471SEric Van Hensbergen /** 9422bad8471SEric Van Hensbergen * v9fs_vfs_rename - VFS hook to rename an inode 9432bad8471SEric Van Hensbergen * @old_dir: old dir inode 9442bad8471SEric Van Hensbergen * @old_dentry: old dentry 9452bad8471SEric Van Hensbergen * @new_dir: new dir inode 9462bad8471SEric Van Hensbergen * @new_dentry: new dentry 9472bad8471SEric Van Hensbergen * 9482bad8471SEric Van Hensbergen */ 9492bad8471SEric Van Hensbergen 95053c06f4eSAneesh Kumar K.V int 9512bad8471SEric Van Hensbergen v9fs_vfs_rename(struct inode *old_dir, struct dentry *old_dentry, 9521cd66c93SMiklos Szeredi struct inode *new_dir, struct dentry *new_dentry, 9531cd66c93SMiklos Szeredi unsigned int flags) 9542bad8471SEric Van Hensbergen { 955d28c61f0SAneesh Kumar K.V int retval; 956bd238fb4SLatchesar Ionkov struct inode *old_inode; 957b271ec47SAneesh Kumar K.V struct inode *new_inode; 958bd238fb4SLatchesar Ionkov struct v9fs_session_info *v9ses; 959bd238fb4SLatchesar Ionkov struct p9_fid *oldfid; 960bd238fb4SLatchesar Ionkov struct p9_fid *olddirfid; 961bd238fb4SLatchesar Ionkov struct p9_fid *newdirfid; 962bd238fb4SLatchesar Ionkov struct p9_wstat wstat; 9632bad8471SEric Van Hensbergen 9641cd66c93SMiklos Szeredi if (flags) 9651cd66c93SMiklos Szeredi return -EINVAL; 9661cd66c93SMiklos Szeredi 9675d385153SJoe Perches p9_debug(P9_DEBUG_VFS, "\n"); 968bd238fb4SLatchesar Ionkov retval = 0; 9692b0143b5SDavid Howells old_inode = d_inode(old_dentry); 9702b0143b5SDavid Howells new_inode = d_inode(new_dentry); 971bd238fb4SLatchesar Ionkov v9ses = v9fs_inode2v9ses(old_inode); 972bd238fb4SLatchesar Ionkov oldfid = v9fs_fid_lookup(old_dentry); 973da977b2cSEric Van Hensbergen if (IS_ERR(oldfid)) 974da977b2cSEric Van Hensbergen return PTR_ERR(oldfid); 975da977b2cSEric Van Hensbergen 976797fc16dSAl Viro olddirfid = clone_fid(v9fs_parent_fid(old_dentry)); 977da977b2cSEric Van Hensbergen if (IS_ERR(olddirfid)) { 978da977b2cSEric Van Hensbergen retval = PTR_ERR(olddirfid); 979bd238fb4SLatchesar Ionkov goto done; 980da977b2cSEric Van Hensbergen } 981da977b2cSEric Van Hensbergen 982797fc16dSAl Viro newdirfid = clone_fid(v9fs_parent_fid(new_dentry)); 983da977b2cSEric Van Hensbergen if (IS_ERR(newdirfid)) { 984da977b2cSEric Van Hensbergen retval = PTR_ERR(newdirfid); 985bd238fb4SLatchesar Ionkov goto clunk_olddir; 9862bad8471SEric Van Hensbergen } 9872bad8471SEric Van Hensbergen 988a534c8d1SAneesh Kumar K.V down_write(&v9ses->rename_sem); 9894681dbdaSSripathi Kodi if (v9fs_proto_dotl(v9ses)) { 9909e8fb38eSAneesh Kumar K.V retval = p9_client_renameat(olddirfid, old_dentry->d_name.name, 9919e8fb38eSAneesh Kumar K.V newdirfid, new_dentry->d_name.name); 9929e8fb38eSAneesh Kumar K.V if (retval == -EOPNOTSUPP) 9934681dbdaSSripathi Kodi retval = p9_client_rename(oldfid, newdirfid, 9949e8fb38eSAneesh Kumar K.V new_dentry->d_name.name); 9959e8fb38eSAneesh Kumar K.V if (retval != -EOPNOTSUPP) 9964681dbdaSSripathi Kodi goto clunk_newdir; 9974681dbdaSSripathi Kodi } 998a534c8d1SAneesh Kumar K.V if (old_dentry->d_parent != new_dentry->d_parent) { 999a534c8d1SAneesh Kumar K.V /* 1000a534c8d1SAneesh Kumar K.V * 9P .u can only handle file rename in the same directory 1001a534c8d1SAneesh Kumar K.V */ 10024681dbdaSSripathi Kodi 10035d385153SJoe Perches p9_debug(P9_DEBUG_ERROR, "old dir and new dir are different\n"); 1004621997cdSEric Van Hensbergen retval = -EXDEV; 1005bd238fb4SLatchesar Ionkov goto clunk_newdir; 10062bad8471SEric Van Hensbergen } 1007531b1094SLatchesar Ionkov v9fs_blank_wstat(&wstat); 1008ba17674fSLatchesar Ionkov wstat.muid = v9ses->uname; 10097880b43bSAl Viro wstat.name = new_dentry->d_name.name; 1010bd238fb4SLatchesar Ionkov retval = p9_client_wstat(oldfid, &wstat); 10112bad8471SEric Van Hensbergen 1012bd238fb4SLatchesar Ionkov clunk_newdir: 1013b271ec47SAneesh Kumar K.V if (!retval) { 1014b271ec47SAneesh Kumar K.V if (new_inode) { 1015b271ec47SAneesh Kumar K.V if (S_ISDIR(new_inode->i_mode)) 1016b271ec47SAneesh Kumar K.V clear_nlink(new_inode); 1017b271ec47SAneesh Kumar K.V else 1018ac89b2efSEryu Guan v9fs_dec_count(new_inode); 1019b271ec47SAneesh Kumar K.V } 1020b271ec47SAneesh Kumar K.V if (S_ISDIR(old_inode->i_mode)) { 1021b271ec47SAneesh Kumar K.V if (!new_inode) 1022b271ec47SAneesh Kumar K.V inc_nlink(new_dir); 1023ac89b2efSEryu Guan v9fs_dec_count(old_dir); 1024b271ec47SAneesh Kumar K.V } 10253bc86de3SAneesh Kumar K.V v9fs_invalidate_inode_attr(old_inode); 1026d28c61f0SAneesh Kumar K.V v9fs_invalidate_inode_attr(old_dir); 1027d28c61f0SAneesh Kumar K.V v9fs_invalidate_inode_attr(new_dir); 10283bc86de3SAneesh Kumar K.V 1029a534c8d1SAneesh Kumar K.V /* successful rename */ 1030a534c8d1SAneesh Kumar K.V d_move(old_dentry, new_dentry); 1031b271ec47SAneesh Kumar K.V } 1032a534c8d1SAneesh Kumar K.V up_write(&v9ses->rename_sem); 103322150c4fSLatchesar Ionkov p9_client_clunk(newdirfid); 10342bad8471SEric Van Hensbergen 1035bd238fb4SLatchesar Ionkov clunk_olddir: 103622150c4fSLatchesar Ionkov p9_client_clunk(olddirfid); 10372bad8471SEric Van Hensbergen 1038bd238fb4SLatchesar Ionkov done: 10392bad8471SEric Van Hensbergen return retval; 10402bad8471SEric Van Hensbergen } 10412bad8471SEric Van Hensbergen 10422bad8471SEric Van Hensbergen /** 1043943ffb58SAdrian Bunk * v9fs_vfs_getattr - retrieve file metadata 1044a528d35eSDavid Howells * @path: Object to query 1045ee443996SEric Van Hensbergen * @stat: metadata structure to populate 1046a528d35eSDavid Howells * @request_mask: Mask of STATX_xxx flags indicating the caller's interests 1047a528d35eSDavid Howells * @flags: AT_STATX_xxx setting 10482bad8471SEric Van Hensbergen * 10492bad8471SEric Van Hensbergen */ 10502bad8471SEric Van Hensbergen 10512bad8471SEric Van Hensbergen static int 1052a528d35eSDavid Howells v9fs_vfs_getattr(const struct path *path, struct kstat *stat, 1053a528d35eSDavid Howells u32 request_mask, unsigned int flags) 10542bad8471SEric Van Hensbergen { 1055a528d35eSDavid Howells struct dentry *dentry = path->dentry; 1056bd238fb4SLatchesar Ionkov struct v9fs_session_info *v9ses; 1057bd238fb4SLatchesar Ionkov struct p9_fid *fid; 105851a87c55SEric Van Hensbergen struct p9_wstat *st; 10592bad8471SEric Van Hensbergen 10605d385153SJoe Perches p9_debug(P9_DEBUG_VFS, "dentry: %p\n", dentry); 106142869c8aSAneesh Kumar K.V v9ses = v9fs_dentry2v9ses(dentry); 1062a1211908SAneesh Kumar K.V if (v9ses->cache == CACHE_LOOSE || v9ses->cache == CACHE_FSCACHE) { 10632b0143b5SDavid Howells generic_fillattr(d_inode(dentry), stat); 1064a1211908SAneesh Kumar K.V return 0; 1065a1211908SAneesh Kumar K.V } 1066bd238fb4SLatchesar Ionkov fid = v9fs_fid_lookup(dentry); 1067da977b2cSEric Van Hensbergen if (IS_ERR(fid)) 1068da977b2cSEric Van Hensbergen return PTR_ERR(fid); 10692bad8471SEric Van Hensbergen 1070bd238fb4SLatchesar Ionkov st = p9_client_stat(fid); 1071bd238fb4SLatchesar Ionkov if (IS_ERR(st)) 1072bd238fb4SLatchesar Ionkov return PTR_ERR(st); 10732bad8471SEric Van Hensbergen 10745e3cc1eeSHou Tao v9fs_stat2inode(st, d_inode(dentry), dentry->d_sb, 0); 10752b0143b5SDavid Howells generic_fillattr(d_inode(dentry), stat); 10762bad8471SEric Van Hensbergen 107762b2be59SLatchesar Ionkov p9stat_free(st); 1078bd238fb4SLatchesar Ionkov kfree(st); 1079bd238fb4SLatchesar Ionkov return 0; 10802bad8471SEric Van Hensbergen } 10812bad8471SEric Van Hensbergen 10822bad8471SEric Van Hensbergen /** 10832bad8471SEric Van Hensbergen * v9fs_vfs_setattr - set file metadata 10842bad8471SEric Van Hensbergen * @dentry: file whose metadata to set 10852bad8471SEric Van Hensbergen * @iattr: metadata assignment structure 10862bad8471SEric Van Hensbergen * 10872bad8471SEric Van Hensbergen */ 10882bad8471SEric Van Hensbergen 10892bad8471SEric Van Hensbergen static int v9fs_vfs_setattr(struct dentry *dentry, struct iattr *iattr) 10902bad8471SEric Van Hensbergen { 1091bd238fb4SLatchesar Ionkov int retval; 1092bd238fb4SLatchesar Ionkov struct v9fs_session_info *v9ses; 1093bd238fb4SLatchesar Ionkov struct p9_fid *fid; 1094bd238fb4SLatchesar Ionkov struct p9_wstat wstat; 10952bad8471SEric Van Hensbergen 10965d385153SJoe Perches p9_debug(P9_DEBUG_VFS, "\n"); 109731051c85SJan Kara retval = setattr_prepare(dentry, iattr); 1098059c138bSAneesh Kumar K.V if (retval) 1099059c138bSAneesh Kumar K.V return retval; 1100059c138bSAneesh Kumar K.V 1101bd238fb4SLatchesar Ionkov retval = -EPERM; 110242869c8aSAneesh Kumar K.V v9ses = v9fs_dentry2v9ses(dentry); 1103bd238fb4SLatchesar Ionkov fid = v9fs_fid_lookup(dentry); 1104da977b2cSEric Van Hensbergen if(IS_ERR(fid)) 1105da977b2cSEric Van Hensbergen return PTR_ERR(fid); 11062bad8471SEric Van Hensbergen 1107531b1094SLatchesar Ionkov v9fs_blank_wstat(&wstat); 11082bad8471SEric Van Hensbergen if (iattr->ia_valid & ATTR_MODE) 1109531b1094SLatchesar Ionkov wstat.mode = unixmode2p9mode(v9ses, iattr->ia_mode); 11102bad8471SEric Van Hensbergen 11112bad8471SEric Van Hensbergen if (iattr->ia_valid & ATTR_MTIME) 1112531b1094SLatchesar Ionkov wstat.mtime = iattr->ia_mtime.tv_sec; 11132bad8471SEric Van Hensbergen 11142bad8471SEric Van Hensbergen if (iattr->ia_valid & ATTR_ATIME) 1115531b1094SLatchesar Ionkov wstat.atime = iattr->ia_atime.tv_sec; 11162bad8471SEric Van Hensbergen 11172bad8471SEric Van Hensbergen if (iattr->ia_valid & ATTR_SIZE) 1118531b1094SLatchesar Ionkov wstat.length = iattr->ia_size; 11192bad8471SEric Van Hensbergen 1120dd6102fbSSripathi Kodi if (v9fs_proto_dotu(v9ses)) { 1121531b1094SLatchesar Ionkov if (iattr->ia_valid & ATTR_UID) 1122531b1094SLatchesar Ionkov wstat.n_uid = iattr->ia_uid; 11232bad8471SEric Van Hensbergen 1124531b1094SLatchesar Ionkov if (iattr->ia_valid & ATTR_GID) 1125531b1094SLatchesar Ionkov wstat.n_gid = iattr->ia_gid; 11262bad8471SEric Van Hensbergen } 1127059c138bSAneesh Kumar K.V 11283dc5436aSAneesh Kumar K.V /* Write all dirty data */ 1129e36cb0b8SDavid Howells if (d_is_reg(dentry)) 11302b0143b5SDavid Howells filemap_write_and_wait(d_inode(dentry)->i_mapping); 11313dc5436aSAneesh Kumar K.V 1132f10fc50fSAneesh Kumar K.V retval = p9_client_wstat(fid, &wstat); 1133f10fc50fSAneesh Kumar K.V if (retval < 0) 1134f10fc50fSAneesh Kumar K.V return retval; 1135059c138bSAneesh Kumar K.V 1136059c138bSAneesh Kumar K.V if ((iattr->ia_valid & ATTR_SIZE) && 11372b0143b5SDavid Howells iattr->ia_size != i_size_read(d_inode(dentry))) 11382b0143b5SDavid Howells truncate_setsize(d_inode(dentry), iattr->ia_size); 1139059c138bSAneesh Kumar K.V 11402b0143b5SDavid Howells v9fs_invalidate_inode_attr(d_inode(dentry)); 11411025774cSChristoph Hellwig 11422b0143b5SDavid Howells setattr_copy(d_inode(dentry), iattr); 11432b0143b5SDavid Howells mark_inode_dirty(d_inode(dentry)); 11441025774cSChristoph Hellwig return 0; 11452bad8471SEric Van Hensbergen } 11462bad8471SEric Van Hensbergen 11472bad8471SEric Van Hensbergen /** 1148531b1094SLatchesar Ionkov * v9fs_stat2inode - populate an inode structure with mistat info 1149531b1094SLatchesar Ionkov * @stat: Plan 9 metadata (mistat) structure 11502bad8471SEric Van Hensbergen * @inode: inode to populate 11512bad8471SEric Van Hensbergen * @sb: superblock of filesystem 11525e3cc1eeSHou Tao * @flags: control flags (e.g. V9FS_STAT2INODE_KEEP_ISIZE) 11532bad8471SEric Van Hensbergen * 11542bad8471SEric Van Hensbergen */ 11552bad8471SEric Van Hensbergen 11562bad8471SEric Van Hensbergen void 115751a87c55SEric Van Hensbergen v9fs_stat2inode(struct p9_wstat *stat, struct inode *inode, 11585e3cc1eeSHou Tao struct super_block *sb, unsigned int flags) 11592bad8471SEric Van Hensbergen { 11603eda0de6SAl Viro umode_t mode; 1161531b1094SLatchesar Ionkov char ext[32]; 11625717144aSAneesh Kumar K.V char tag_name[14]; 11635717144aSAneesh Kumar K.V unsigned int i_nlink; 11642bad8471SEric Van Hensbergen struct v9fs_session_info *v9ses = sb->s_fs_info; 1165b3cbea03SAneesh Kumar K.V struct v9fs_inode *v9inode = V9FS_I(inode); 11662bad8471SEric Van Hensbergen 1167bfe86848SMiklos Szeredi set_nlink(inode, 1); 11682bad8471SEric Van Hensbergen 1169531b1094SLatchesar Ionkov inode->i_atime.tv_sec = stat->atime; 1170531b1094SLatchesar Ionkov inode->i_mtime.tv_sec = stat->mtime; 1171531b1094SLatchesar Ionkov inode->i_ctime.tv_sec = stat->mtime; 11722bad8471SEric Van Hensbergen 1173bd32b82dSLatchesar Ionkov inode->i_uid = v9ses->dfltuid; 1174bd32b82dSLatchesar Ionkov inode->i_gid = v9ses->dfltgid; 11752bad8471SEric Van Hensbergen 1176dd6102fbSSripathi Kodi if (v9fs_proto_dotu(v9ses)) { 1177531b1094SLatchesar Ionkov inode->i_uid = stat->n_uid; 1178531b1094SLatchesar Ionkov inode->i_gid = stat->n_gid; 1179531b1094SLatchesar Ionkov } 11805717144aSAneesh Kumar K.V if ((S_ISREG(inode->i_mode)) || (S_ISDIR(inode->i_mode))) { 11815717144aSAneesh Kumar K.V if (v9fs_proto_dotu(v9ses) && (stat->extension[0] != '\0')) { 11825717144aSAneesh Kumar K.V /* 11835717144aSAneesh Kumar K.V * Hadlink support got added later to 11845717144aSAneesh Kumar K.V * to the .u extension. So there can be 11855717144aSAneesh Kumar K.V * server out there that doesn't support 11865717144aSAneesh Kumar K.V * this even with .u extension. So check 11875717144aSAneesh Kumar K.V * for non NULL stat->extension 11885717144aSAneesh Kumar K.V */ 1189b3f8ab4bSChen Gang strlcpy(ext, stat->extension, sizeof(ext)); 11905717144aSAneesh Kumar K.V /* HARDLINKCOUNT %u */ 11915717144aSAneesh Kumar K.V sscanf(ext, "%13s %u", tag_name, &i_nlink); 11925717144aSAneesh Kumar K.V if (!strncmp(tag_name, "HARDLINKCOUNT", 13)) 1193bfe86848SMiklos Szeredi set_nlink(inode, i_nlink); 11945717144aSAneesh Kumar K.V } 11955717144aSAneesh Kumar K.V } 1196df345c67SAneesh Kumar K.V mode = p9mode2perm(v9ses, stat); 119745089142SAneesh Kumar K.V mode |= inode->i_mode & ~S_IALLUGO; 119845089142SAneesh Kumar K.V inode->i_mode = mode; 11992bad8471SEric Van Hensbergen 12005e3cc1eeSHou Tao if (!(flags & V9FS_STAT2INODE_KEEP_ISIZE)) 12015e3cc1eeSHou Tao v9fs_i_size_write(inode, stat->length); 1202bd238fb4SLatchesar Ionkov /* not real number of blocks, but 512 byte ones ... */ 12035e3cc1eeSHou Tao inode->i_blocks = (stat->length + 512 - 1) >> 9; 1204b3cbea03SAneesh Kumar K.V v9inode->cache_validity &= ~V9FS_INO_INVALID_ATTR; 12052bad8471SEric Van Hensbergen } 12062bad8471SEric Van Hensbergen 12072bad8471SEric Van Hensbergen /** 12082bad8471SEric Van Hensbergen * v9fs_qid2ino - convert qid into inode number 12092bad8471SEric Van Hensbergen * @qid: qid to hash 12102bad8471SEric Van Hensbergen * 12112bad8471SEric Van Hensbergen * BUG: potential for inode number collisions? 12122bad8471SEric Van Hensbergen */ 12132bad8471SEric Van Hensbergen 1214bd238fb4SLatchesar Ionkov ino_t v9fs_qid2ino(struct p9_qid *qid) 12152bad8471SEric Van Hensbergen { 12162bad8471SEric Van Hensbergen u64 path = qid->path + 2; 12172bad8471SEric Van Hensbergen ino_t i = 0; 12182bad8471SEric Van Hensbergen 12192bad8471SEric Van Hensbergen if (sizeof(ino_t) == sizeof(path)) 12202bad8471SEric Van Hensbergen memcpy(&i, &path, sizeof(ino_t)); 12212bad8471SEric Van Hensbergen else 12222bad8471SEric Van Hensbergen i = (ino_t) (path ^ (path >> 32)); 12232bad8471SEric Van Hensbergen 12242bad8471SEric Van Hensbergen return i; 12252bad8471SEric Van Hensbergen } 12262bad8471SEric Van Hensbergen 12272bad8471SEric Van Hensbergen /** 12286b255391SAl Viro * v9fs_vfs_get_link - follow a symlink path 12292bad8471SEric Van Hensbergen * @dentry: dentry for symlink 12306b255391SAl Viro * @inode: inode for symlink 1231fceef393SAl Viro * @done: delayed call for when we are done with the return value 12322bad8471SEric Van Hensbergen */ 12332bad8471SEric Van Hensbergen 12346b255391SAl Viro static const char *v9fs_vfs_get_link(struct dentry *dentry, 1235fceef393SAl Viro struct inode *inode, 1236fceef393SAl Viro struct delayed_call *done) 12372bad8471SEric Van Hensbergen { 12386b255391SAl Viro struct v9fs_session_info *v9ses; 12396b255391SAl Viro struct p9_fid *fid; 124090e4fc88SAl Viro struct p9_wstat *st; 1241680baacbSAl Viro char *res; 12422bad8471SEric Van Hensbergen 12436b255391SAl Viro if (!dentry) 12446b255391SAl Viro return ERR_PTR(-ECHILD); 12456b255391SAl Viro 12466b255391SAl Viro v9ses = v9fs_dentry2v9ses(dentry); 12476b255391SAl Viro fid = v9fs_fid_lookup(dentry); 12484b8e9923SAl Viro p9_debug(P9_DEBUG_VFS, "%pd\n", dentry); 12492bad8471SEric Van Hensbergen 125090e4fc88SAl Viro if (IS_ERR(fid)) 125190e4fc88SAl Viro return ERR_CAST(fid); 12522bad8471SEric Van Hensbergen 125390e4fc88SAl Viro if (!v9fs_proto_dotu(v9ses)) 125490e4fc88SAl Viro return ERR_PTR(-EBADF); 125590e4fc88SAl Viro 125690e4fc88SAl Viro st = p9_client_stat(fid); 125790e4fc88SAl Viro if (IS_ERR(st)) 125890e4fc88SAl Viro return ERR_CAST(st); 125990e4fc88SAl Viro 126090e4fc88SAl Viro if (!(st->mode & P9_DMSYMLINK)) { 126190e4fc88SAl Viro p9stat_free(st); 126290e4fc88SAl Viro kfree(st); 126390e4fc88SAl Viro return ERR_PTR(-EINVAL); 12642bad8471SEric Van Hensbergen } 1265680baacbSAl Viro res = st->extension; 126690e4fc88SAl Viro st->extension = NULL; 1267680baacbSAl Viro if (strlen(res) >= PATH_MAX) 1268680baacbSAl Viro res[PATH_MAX - 1] = '\0'; 1269680baacbSAl Viro 127090e4fc88SAl Viro p9stat_free(st); 127190e4fc88SAl Viro kfree(st); 1272fceef393SAl Viro set_delayed_call(done, kfree_link, res); 1273fceef393SAl Viro return res; 12742bad8471SEric Van Hensbergen } 12752bad8471SEric Van Hensbergen 12762bad8471SEric Van Hensbergen /** 1277ee443996SEric Van Hensbergen * v9fs_vfs_mkspecial - create a special file 1278ee443996SEric Van Hensbergen * @dir: inode to create special file in 1279ee443996SEric Van Hensbergen * @dentry: dentry to create 1280fd2916bdSFabian Frederick * @perm: mode to create special file 1281ee443996SEric Van Hensbergen * @extension: 9p2000.u format extension string representing special file 1282ee443996SEric Van Hensbergen * 1283ee443996SEric Van Hensbergen */ 1284ee443996SEric Van Hensbergen 1285531b1094SLatchesar Ionkov static int v9fs_vfs_mkspecial(struct inode *dir, struct dentry *dentry, 1286c2837de7SAl Viro u32 perm, const char *extension) 1287531b1094SLatchesar Ionkov { 1288bd238fb4SLatchesar Ionkov struct p9_fid *fid; 1289d28c61f0SAneesh Kumar K.V struct v9fs_session_info *v9ses; 1290531b1094SLatchesar Ionkov 12916a3124a3SLatchesar Ionkov v9ses = v9fs_inode2v9ses(dir); 1292dd6102fbSSripathi Kodi if (!v9fs_proto_dotu(v9ses)) { 12935d385153SJoe Perches p9_debug(P9_DEBUG_ERROR, "not extended\n"); 12946a3124a3SLatchesar Ionkov return -EPERM; 1295531b1094SLatchesar Ionkov } 1296531b1094SLatchesar Ionkov 1297bd238fb4SLatchesar Ionkov fid = v9fs_create(v9ses, dir, dentry, (char *) extension, perm, 1298bd238fb4SLatchesar Ionkov P9_OREAD); 1299bd238fb4SLatchesar Ionkov if (IS_ERR(fid)) 1300bd238fb4SLatchesar Ionkov return PTR_ERR(fid); 1301da977b2cSEric Van Hensbergen 1302d28c61f0SAneesh Kumar K.V v9fs_invalidate_inode_attr(dir); 1303bd238fb4SLatchesar Ionkov p9_client_clunk(fid); 13046a3124a3SLatchesar Ionkov return 0; 1305531b1094SLatchesar Ionkov } 1306531b1094SLatchesar Ionkov 1307531b1094SLatchesar Ionkov /** 1308531b1094SLatchesar Ionkov * v9fs_vfs_symlink - helper function to create symlinks 1309531b1094SLatchesar Ionkov * @dir: directory inode containing symlink 1310531b1094SLatchesar Ionkov * @dentry: dentry for symlink 1311531b1094SLatchesar Ionkov * @symname: symlink data 1312531b1094SLatchesar Ionkov * 1313ee443996SEric Van Hensbergen * See Also: 9P2000.u RFC for more information 1314531b1094SLatchesar Ionkov * 1315531b1094SLatchesar Ionkov */ 1316531b1094SLatchesar Ionkov 1317531b1094SLatchesar Ionkov static int 1318531b1094SLatchesar Ionkov v9fs_vfs_symlink(struct inode *dir, struct dentry *dentry, const char *symname) 1319531b1094SLatchesar Ionkov { 13204b8e9923SAl Viro p9_debug(P9_DEBUG_VFS, " %lu,%pd,%s\n", 13214b8e9923SAl Viro dir->i_ino, dentry, symname); 1322531b1094SLatchesar Ionkov 1323c2837de7SAl Viro return v9fs_vfs_mkspecial(dir, dentry, P9_DMSYMLINK, symname); 1324531b1094SLatchesar Ionkov } 1325531b1094SLatchesar Ionkov 1326b46c267eSAl Viro #define U32_MAX_DIGITS 10 1327b46c267eSAl Viro 13282bad8471SEric Van Hensbergen /** 13292bad8471SEric Van Hensbergen * v9fs_vfs_link - create a hardlink 13302bad8471SEric Van Hensbergen * @old_dentry: dentry for file to link to 13312bad8471SEric Van Hensbergen * @dir: inode destination for new link 133273c592b9SEric Van Hensbergen * @dentry: dentry for link 13332bad8471SEric Van Hensbergen * 13342bad8471SEric Van Hensbergen */ 13352bad8471SEric Van Hensbergen 13362bad8471SEric Van Hensbergen static int 13372bad8471SEric Van Hensbergen v9fs_vfs_link(struct dentry *old_dentry, struct inode *dir, 13382bad8471SEric Van Hensbergen struct dentry *dentry) 13392bad8471SEric Van Hensbergen { 1340531b1094SLatchesar Ionkov int retval; 1341b46c267eSAl Viro char name[1 + U32_MAX_DIGITS + 2]; /* sign + number + \n + \0 */ 1342d28c61f0SAneesh Kumar K.V struct p9_fid *oldfid; 13432bad8471SEric Van Hensbergen 13444b8e9923SAl Viro p9_debug(P9_DEBUG_VFS, " %lu,%pd,%pd\n", 13454b8e9923SAl Viro dir->i_ino, dentry, old_dentry); 13462bad8471SEric Van Hensbergen 1347da977b2cSEric Van Hensbergen oldfid = v9fs_fid_clone(old_dentry); 1348da977b2cSEric Van Hensbergen if (IS_ERR(oldfid)) 1349da977b2cSEric Van Hensbergen return PTR_ERR(oldfid); 13502bad8471SEric Van Hensbergen 135116cce6d2SLatchesar Ionkov sprintf(name, "%d\n", oldfid->fid); 1352bd238fb4SLatchesar Ionkov retval = v9fs_vfs_mkspecial(dir, dentry, P9_DMLINK, name); 1353c06c066aSAneesh Kumar K.V if (!retval) { 13542b0143b5SDavid Howells v9fs_refresh_inode(oldfid, d_inode(old_dentry)); 1355d28c61f0SAneesh Kumar K.V v9fs_invalidate_inode_attr(dir); 1356c06c066aSAneesh Kumar K.V } 1357bd238fb4SLatchesar Ionkov p9_client_clunk(oldfid); 13582bad8471SEric Van Hensbergen return retval; 13592bad8471SEric Van Hensbergen } 13602bad8471SEric Van Hensbergen 13612bad8471SEric Van Hensbergen /** 13622bad8471SEric Van Hensbergen * v9fs_vfs_mknod - create a special file 13632bad8471SEric Van Hensbergen * @dir: inode destination for new link 13642bad8471SEric Van Hensbergen * @dentry: dentry for file 13652bad8471SEric Van Hensbergen * @mode: mode for creation 1366ee443996SEric Van Hensbergen * @rdev: device associated with special file 13672bad8471SEric Van Hensbergen * 13682bad8471SEric Van Hensbergen */ 13692bad8471SEric Van Hensbergen 13702bad8471SEric Van Hensbergen static int 13711a67aafbSAl Viro v9fs_vfs_mknod(struct inode *dir, struct dentry *dentry, umode_t mode, dev_t rdev) 13722bad8471SEric Van Hensbergen { 1373c2837de7SAl Viro struct v9fs_session_info *v9ses = v9fs_inode2v9ses(dir); 1374531b1094SLatchesar Ionkov int retval; 1375b46c267eSAl Viro char name[2 + U32_MAX_DIGITS + 1 + U32_MAX_DIGITS + 1]; 1376c2837de7SAl Viro u32 perm; 13772bad8471SEric Van Hensbergen 13784b8e9923SAl Viro p9_debug(P9_DEBUG_VFS, " %lu,%pd mode: %hx MAJOR: %u MINOR: %u\n", 13794b8e9923SAl Viro dir->i_ino, dentry, mode, 13805d385153SJoe Perches MAJOR(rdev), MINOR(rdev)); 13812bad8471SEric Van Hensbergen 13822bad8471SEric Van Hensbergen /* build extension */ 13832bad8471SEric Van Hensbergen if (S_ISBLK(mode)) 1384531b1094SLatchesar Ionkov sprintf(name, "b %u %u", MAJOR(rdev), MINOR(rdev)); 13852bad8471SEric Van Hensbergen else if (S_ISCHR(mode)) 1386531b1094SLatchesar Ionkov sprintf(name, "c %u %u", MAJOR(rdev), MINOR(rdev)); 1387b46c267eSAl Viro else 1388531b1094SLatchesar Ionkov *name = 0; 13892bad8471SEric Van Hensbergen 1390c2837de7SAl Viro perm = unixmode2p9mode(v9ses, mode); 1391c2837de7SAl Viro retval = v9fs_vfs_mkspecial(dir, dentry, perm, name); 13922bad8471SEric Van Hensbergen 13932bad8471SEric Van Hensbergen return retval; 13942bad8471SEric Van Hensbergen } 13952bad8471SEric Van Hensbergen 1396b3cbea03SAneesh Kumar K.V int v9fs_refresh_inode(struct p9_fid *fid, struct inode *inode) 1397b3cbea03SAneesh Kumar K.V { 139845089142SAneesh Kumar K.V int umode; 139945089142SAneesh Kumar K.V dev_t rdev; 1400b3cbea03SAneesh Kumar K.V struct p9_wstat *st; 1401b3cbea03SAneesh Kumar K.V struct v9fs_session_info *v9ses; 14025e3cc1eeSHou Tao unsigned int flags; 1403b3cbea03SAneesh Kumar K.V 1404b3cbea03SAneesh Kumar K.V v9ses = v9fs_inode2v9ses(inode); 1405b3cbea03SAneesh Kumar K.V st = p9_client_stat(fid); 1406b3cbea03SAneesh Kumar K.V if (IS_ERR(st)) 1407b3cbea03SAneesh Kumar K.V return PTR_ERR(st); 140845089142SAneesh Kumar K.V /* 140945089142SAneesh Kumar K.V * Don't update inode if the file type is different 141045089142SAneesh Kumar K.V */ 141145089142SAneesh Kumar K.V umode = p9mode2unixmode(v9ses, st, &rdev); 141245089142SAneesh Kumar K.V if ((inode->i_mode & S_IFMT) != (umode & S_IFMT)) 141345089142SAneesh Kumar K.V goto out; 1414b3cbea03SAneesh Kumar K.V 1415b3cbea03SAneesh Kumar K.V /* 1416b3cbea03SAneesh Kumar K.V * We don't want to refresh inode->i_size, 1417b3cbea03SAneesh Kumar K.V * because we may have cached data 1418b3cbea03SAneesh Kumar K.V */ 14195e3cc1eeSHou Tao flags = (v9ses->cache == CACHE_LOOSE || v9ses->cache == CACHE_FSCACHE) ? 14205e3cc1eeSHou Tao V9FS_STAT2INODE_KEEP_ISIZE : 0; 14215e3cc1eeSHou Tao v9fs_stat2inode(st, inode, inode->i_sb, flags); 142245089142SAneesh Kumar K.V out: 1423b3cbea03SAneesh Kumar K.V p9stat_free(st); 1424b3cbea03SAneesh Kumar K.V kfree(st); 1425b3cbea03SAneesh Kumar K.V return 0; 1426b3cbea03SAneesh Kumar K.V } 1427b3cbea03SAneesh Kumar K.V 14289b6533c9SSripathi Kodi static const struct inode_operations v9fs_dir_inode_operations_dotu = { 14299b6533c9SSripathi Kodi .create = v9fs_vfs_create, 14309b6533c9SSripathi Kodi .lookup = v9fs_vfs_lookup, 1431e43ae79cSMiklos Szeredi .atomic_open = v9fs_vfs_atomic_open, 14329b6533c9SSripathi Kodi .symlink = v9fs_vfs_symlink, 143350cc42ffSVenkateswararao Jujjuri (JV) .link = v9fs_vfs_link, 14349b6533c9SSripathi Kodi .unlink = v9fs_vfs_unlink, 14359b6533c9SSripathi Kodi .mkdir = v9fs_vfs_mkdir, 14369b6533c9SSripathi Kodi .rmdir = v9fs_vfs_rmdir, 14371d76e313SAneesh Kumar K.V .mknod = v9fs_vfs_mknod, 14389b6533c9SSripathi Kodi .rename = v9fs_vfs_rename, 14399b6533c9SSripathi Kodi .getattr = v9fs_vfs_getattr, 14409b6533c9SSripathi Kodi .setattr = v9fs_vfs_setattr, 14419b6533c9SSripathi Kodi }; 14429b6533c9SSripathi Kodi 1443754661f1SArjan van de Ven static const struct inode_operations v9fs_dir_inode_operations = { 1444b501611aSEric Van Hensbergen .create = v9fs_vfs_create, 1445b501611aSEric Van Hensbergen .lookup = v9fs_vfs_lookup, 1446e43ae79cSMiklos Szeredi .atomic_open = v9fs_vfs_atomic_open, 1447b501611aSEric Van Hensbergen .unlink = v9fs_vfs_unlink, 1448b501611aSEric Van Hensbergen .mkdir = v9fs_vfs_mkdir, 1449b501611aSEric Van Hensbergen .rmdir = v9fs_vfs_rmdir, 1450b501611aSEric Van Hensbergen .mknod = v9fs_vfs_mknod, 1451b501611aSEric Van Hensbergen .rename = v9fs_vfs_rename, 1452b501611aSEric Van Hensbergen .getattr = v9fs_vfs_getattr, 1453b501611aSEric Van Hensbergen .setattr = v9fs_vfs_setattr, 1454b501611aSEric Van Hensbergen }; 1455b501611aSEric Van Hensbergen 1456754661f1SArjan van de Ven static const struct inode_operations v9fs_file_inode_operations = { 14572bad8471SEric Van Hensbergen .getattr = v9fs_vfs_getattr, 14582bad8471SEric Van Hensbergen .setattr = v9fs_vfs_setattr, 14592bad8471SEric Van Hensbergen }; 14602bad8471SEric Van Hensbergen 1461754661f1SArjan van de Ven static const struct inode_operations v9fs_symlink_inode_operations = { 14626b255391SAl Viro .get_link = v9fs_vfs_get_link, 14632bad8471SEric Van Hensbergen .getattr = v9fs_vfs_getattr, 14642bad8471SEric Van Hensbergen .setattr = v9fs_vfs_setattr, 14652bad8471SEric Van Hensbergen }; 14669b6533c9SSripathi Kodi 1467