11f327613SThomas Gleixner // SPDX-License-Identifier: GPL-2.0-only 22bad8471SEric Van Hensbergen /* 373c592b9SEric Van Hensbergen * This file contains vfs inode ops for the 9P2000 protocol. 42bad8471SEric Van Hensbergen * 52bad8471SEric Van Hensbergen * Copyright (C) 2004 by Eric Van Hensbergen <ericvh@gmail.com> 62bad8471SEric Van Hensbergen * Copyright (C) 2002 by Ron Minnich <rminnich@lanl.gov> 72bad8471SEric Van Hensbergen */ 82bad8471SEric Van Hensbergen 95d385153SJoe Perches #define pr_fmt(fmt) KBUILD_MODNAME ": " fmt 105d385153SJoe Perches 112bad8471SEric Van Hensbergen #include <linux/module.h> 122bad8471SEric Van Hensbergen #include <linux/errno.h> 132bad8471SEric Van Hensbergen #include <linux/fs.h> 142bad8471SEric Van Hensbergen #include <linux/file.h> 152bad8471SEric Van Hensbergen #include <linux/pagemap.h> 162bad8471SEric Van Hensbergen #include <linux/stat.h> 172bad8471SEric Van Hensbergen #include <linux/string.h> 182bad8471SEric Van Hensbergen #include <linux/namei.h> 19e8edc6e0SAlexey Dobriyan #include <linux/sched.h> 205a0e3ad6STejun Heo #include <linux/slab.h> 21ebf46264SAneesh Kumar K.V #include <linux/xattr.h> 2285ff872dSAneesh Kumar K.V #include <linux/posix_acl.h> 23bd238fb4SLatchesar Ionkov #include <net/9p/9p.h> 24bd238fb4SLatchesar Ionkov #include <net/9p/client.h> 252bad8471SEric Van Hensbergen 262bad8471SEric Van Hensbergen #include "v9fs.h" 272bad8471SEric Van Hensbergen #include "v9fs_vfs.h" 282bad8471SEric Van Hensbergen #include "fid.h" 2960e78d2cSAbhishek Kulkarni #include "cache.h" 30ebf46264SAneesh Kumar K.V #include "xattr.h" 3185ff872dSAneesh Kumar K.V #include "acl.h" 322bad8471SEric Van Hensbergen 33754661f1SArjan van de Ven static const struct inode_operations v9fs_dir_inode_operations; 349b6533c9SSripathi Kodi static const struct inode_operations v9fs_dir_inode_operations_dotu; 35754661f1SArjan van de Ven static const struct inode_operations v9fs_file_inode_operations; 36754661f1SArjan van de Ven static const struct inode_operations v9fs_symlink_inode_operations; 37f5fc6145SAneesh Kumar K.V 382bad8471SEric Van Hensbergen /** 392bad8471SEric Van Hensbergen * unixmode2p9mode - convert unix mode bits to plan 9 402bad8471SEric Van Hensbergen * @v9ses: v9fs session information 412bad8471SEric Van Hensbergen * @mode: mode to convert 422bad8471SEric Van Hensbergen * 432bad8471SEric Van Hensbergen */ 442bad8471SEric Van Hensbergen 453eda0de6SAl Viro static u32 unixmode2p9mode(struct v9fs_session_info *v9ses, umode_t mode) 462bad8471SEric Van Hensbergen { 472bad8471SEric Van Hensbergen int res; 486e195b0fSDominique Martinet 492bad8471SEric Van Hensbergen res = mode & 0777; 502bad8471SEric Van Hensbergen if (S_ISDIR(mode)) 51bd238fb4SLatchesar Ionkov res |= P9_DMDIR; 52dd6102fbSSripathi Kodi if (v9fs_proto_dotu(v9ses)) { 532bad8471SEric Van Hensbergen if (v9ses->nodev == 0) { 542bad8471SEric Van Hensbergen if (S_ISSOCK(mode)) 55bd238fb4SLatchesar Ionkov res |= P9_DMSOCKET; 562bad8471SEric Van Hensbergen if (S_ISFIFO(mode)) 57bd238fb4SLatchesar Ionkov res |= P9_DMNAMEDPIPE; 582bad8471SEric Van Hensbergen if (S_ISBLK(mode)) 59bd238fb4SLatchesar Ionkov res |= P9_DMDEVICE; 602bad8471SEric Van Hensbergen if (S_ISCHR(mode)) 61bd238fb4SLatchesar Ionkov res |= P9_DMDEVICE; 622bad8471SEric Van Hensbergen } 632bad8471SEric Van Hensbergen 642bad8471SEric Van Hensbergen if ((mode & S_ISUID) == S_ISUID) 65bd238fb4SLatchesar Ionkov res |= P9_DMSETUID; 662bad8471SEric Van Hensbergen if ((mode & S_ISGID) == S_ISGID) 67bd238fb4SLatchesar Ionkov res |= P9_DMSETGID; 68d199d652SAnthony Liguori if ((mode & S_ISVTX) == S_ISVTX) 69d199d652SAnthony Liguori res |= P9_DMSETVTX; 702bad8471SEric Van Hensbergen } 712bad8471SEric Van Hensbergen return res; 722bad8471SEric Van Hensbergen } 732bad8471SEric Van Hensbergen 742bad8471SEric Van Hensbergen /** 75df345c67SAneesh Kumar K.V * p9mode2perm- convert plan9 mode bits to unix permission bits 76df345c67SAneesh Kumar K.V * @v9ses: v9fs session information 77df345c67SAneesh Kumar K.V * @stat: p9_wstat from which mode need to be derived 78df345c67SAneesh Kumar K.V * 79df345c67SAneesh Kumar K.V */ 80df345c67SAneesh Kumar K.V static int p9mode2perm(struct v9fs_session_info *v9ses, 81df345c67SAneesh Kumar K.V struct p9_wstat *stat) 82df345c67SAneesh Kumar K.V { 83df345c67SAneesh Kumar K.V int res; 84df345c67SAneesh Kumar K.V int mode = stat->mode; 85df345c67SAneesh Kumar K.V 86df345c67SAneesh Kumar K.V res = mode & S_IALLUGO; 87df345c67SAneesh Kumar K.V if (v9fs_proto_dotu(v9ses)) { 88df345c67SAneesh Kumar K.V if ((mode & P9_DMSETUID) == P9_DMSETUID) 89df345c67SAneesh Kumar K.V res |= S_ISUID; 90df345c67SAneesh Kumar K.V 91df345c67SAneesh Kumar K.V if ((mode & P9_DMSETGID) == P9_DMSETGID) 92df345c67SAneesh Kumar K.V res |= S_ISGID; 93df345c67SAneesh Kumar K.V 94df345c67SAneesh Kumar K.V if ((mode & P9_DMSETVTX) == P9_DMSETVTX) 95df345c67SAneesh Kumar K.V res |= S_ISVTX; 96df345c67SAneesh Kumar K.V } 97df345c67SAneesh Kumar K.V return res; 98df345c67SAneesh Kumar K.V } 99df345c67SAneesh Kumar K.V 100df345c67SAneesh Kumar K.V /** 1012bad8471SEric Van Hensbergen * p9mode2unixmode- convert plan9 mode bits to unix mode bits 1022bad8471SEric Van Hensbergen * @v9ses: v9fs session information 10345089142SAneesh Kumar K.V * @stat: p9_wstat from which mode need to be derived 10445089142SAneesh Kumar K.V * @rdev: major number, minor number in case of device files. 1052bad8471SEric Van Hensbergen * 1062bad8471SEric Van Hensbergen */ 1073eda0de6SAl Viro static umode_t p9mode2unixmode(struct v9fs_session_info *v9ses, 10845089142SAneesh Kumar K.V struct p9_wstat *stat, dev_t *rdev) 1092bad8471SEric Van Hensbergen { 11005f975cdSDominique Martinet int res, r; 1113eda0de6SAl Viro u32 mode = stat->mode; 1122bad8471SEric Van Hensbergen 11345089142SAneesh Kumar K.V *rdev = 0; 114df345c67SAneesh Kumar K.V res = p9mode2perm(v9ses, stat); 1152bad8471SEric Van Hensbergen 116bd238fb4SLatchesar Ionkov if ((mode & P9_DMDIR) == P9_DMDIR) 1172bad8471SEric Van Hensbergen res |= S_IFDIR; 118dd6102fbSSripathi Kodi else if ((mode & P9_DMSYMLINK) && (v9fs_proto_dotu(v9ses))) 1192bad8471SEric Van Hensbergen res |= S_IFLNK; 120dd6102fbSSripathi Kodi else if ((mode & P9_DMSOCKET) && (v9fs_proto_dotu(v9ses)) 1212bad8471SEric Van Hensbergen && (v9ses->nodev == 0)) 1222bad8471SEric Van Hensbergen res |= S_IFSOCK; 123dd6102fbSSripathi Kodi else if ((mode & P9_DMNAMEDPIPE) && (v9fs_proto_dotu(v9ses)) 1242bad8471SEric Van Hensbergen && (v9ses->nodev == 0)) 1252bad8471SEric Van Hensbergen res |= S_IFIFO; 126dd6102fbSSripathi Kodi else if ((mode & P9_DMDEVICE) && (v9fs_proto_dotu(v9ses)) 12745089142SAneesh Kumar K.V && (v9ses->nodev == 0)) { 12805f975cdSDominique Martinet char type = 0; 12945089142SAneesh Kumar K.V int major = -1, minor = -1; 13045089142SAneesh Kumar K.V 13105f975cdSDominique Martinet r = sscanf(stat->extension, "%c %i %i", &type, &major, &minor); 13205f975cdSDominique Martinet if (r != 3) { 13305f975cdSDominique Martinet p9_debug(P9_DEBUG_ERROR, 13405f975cdSDominique Martinet "invalid device string, umode will be bogus: %s\n", 13505f975cdSDominique Martinet stat->extension); 13605f975cdSDominique Martinet return res; 13705f975cdSDominique Martinet } 13845089142SAneesh Kumar K.V switch (type) { 13945089142SAneesh Kumar K.V case 'c': 14045089142SAneesh Kumar K.V res |= S_IFCHR; 14145089142SAneesh Kumar K.V break; 14245089142SAneesh Kumar K.V case 'b': 1432bad8471SEric Van Hensbergen res |= S_IFBLK; 14445089142SAneesh Kumar K.V break; 14545089142SAneesh Kumar K.V default: 1465d385153SJoe Perches p9_debug(P9_DEBUG_ERROR, "Unknown special type %c %s\n", 1475d385153SJoe Perches type, stat->extension); 14851958817Szhengbin } 14945089142SAneesh Kumar K.V *rdev = MKDEV(major, minor); 15045089142SAneesh Kumar K.V } else 1512bad8471SEric Van Hensbergen res |= S_IFREG; 1522bad8471SEric Van Hensbergen 1532bad8471SEric Van Hensbergen return res; 1542bad8471SEric Van Hensbergen } 1552bad8471SEric Van Hensbergen 156ee443996SEric Van Hensbergen /** 157ee443996SEric Van Hensbergen * v9fs_uflags2omode- convert posix open flags to plan 9 mode bits 158ee443996SEric Van Hensbergen * @uflags: flags to convert 1592e4bef41SEric Van Hensbergen * @extended: if .u extensions are active 160ee443996SEric Van Hensbergen */ 161ee443996SEric Van Hensbergen 1622e4bef41SEric Van Hensbergen int v9fs_uflags2omode(int uflags, int extended) 1636a3124a3SLatchesar Ionkov { 1646a3124a3SLatchesar Ionkov int ret; 1656a3124a3SLatchesar Ionkov 1666a3124a3SLatchesar Ionkov switch (uflags&3) { 1676a3124a3SLatchesar Ionkov default: 1686a3124a3SLatchesar Ionkov case O_RDONLY: 169bd238fb4SLatchesar Ionkov ret = P9_OREAD; 1706a3124a3SLatchesar Ionkov break; 1716a3124a3SLatchesar Ionkov 1726a3124a3SLatchesar Ionkov case O_WRONLY: 173bd238fb4SLatchesar Ionkov ret = P9_OWRITE; 1746a3124a3SLatchesar Ionkov break; 1756a3124a3SLatchesar Ionkov 1766a3124a3SLatchesar Ionkov case O_RDWR: 177bd238fb4SLatchesar Ionkov ret = P9_ORDWR; 1786a3124a3SLatchesar Ionkov break; 1796a3124a3SLatchesar Ionkov } 1806a3124a3SLatchesar Ionkov 1812e4bef41SEric Van Hensbergen if (extended) { 1822e4bef41SEric Van Hensbergen if (uflags & O_EXCL) 1832e4bef41SEric Van Hensbergen ret |= P9_OEXCL; 1842e4bef41SEric Van Hensbergen 1856a3124a3SLatchesar Ionkov if (uflags & O_APPEND) 186bd238fb4SLatchesar Ionkov ret |= P9_OAPPEND; 1872e4bef41SEric Van Hensbergen } 1886a3124a3SLatchesar Ionkov 1896a3124a3SLatchesar Ionkov return ret; 1906a3124a3SLatchesar Ionkov } 1916a3124a3SLatchesar Ionkov 1922bad8471SEric Van Hensbergen /** 193531b1094SLatchesar Ionkov * v9fs_blank_wstat - helper function to setup a 9P stat structure 194531b1094SLatchesar Ionkov * @wstat: structure to initialize 1952bad8471SEric Van Hensbergen * 1962bad8471SEric Van Hensbergen */ 1972bad8471SEric Van Hensbergen 1987a4439c4SM. Mohan Kumar void 199bd238fb4SLatchesar Ionkov v9fs_blank_wstat(struct p9_wstat *wstat) 2002bad8471SEric Van Hensbergen { 201531b1094SLatchesar Ionkov wstat->type = ~0; 202531b1094SLatchesar Ionkov wstat->dev = ~0; 203531b1094SLatchesar Ionkov wstat->qid.type = ~0; 204531b1094SLatchesar Ionkov wstat->qid.version = ~0; 205531b1094SLatchesar Ionkov *((long long *)&wstat->qid.path) = ~0; 206531b1094SLatchesar Ionkov wstat->mode = ~0; 207531b1094SLatchesar Ionkov wstat->atime = ~0; 208531b1094SLatchesar Ionkov wstat->mtime = ~0; 209531b1094SLatchesar Ionkov wstat->length = ~0; 210531b1094SLatchesar Ionkov wstat->name = NULL; 211531b1094SLatchesar Ionkov wstat->uid = NULL; 212531b1094SLatchesar Ionkov wstat->gid = NULL; 213531b1094SLatchesar Ionkov wstat->muid = NULL; 214447c5094SEric W. Biederman wstat->n_uid = INVALID_UID; 215447c5094SEric W. Biederman wstat->n_gid = INVALID_GID; 216447c5094SEric W. Biederman wstat->n_muid = INVALID_UID; 217531b1094SLatchesar Ionkov wstat->extension = NULL; 2182bad8471SEric Van Hensbergen } 2192bad8471SEric Van Hensbergen 22060e78d2cSAbhishek Kulkarni /** 22160e78d2cSAbhishek Kulkarni * v9fs_alloc_inode - helper function to allocate an inode 222bc868036SDavid Howells * @sb: The superblock to allocate the inode from 22360e78d2cSAbhishek Kulkarni */ 22460e78d2cSAbhishek Kulkarni struct inode *v9fs_alloc_inode(struct super_block *sb) 22560e78d2cSAbhishek Kulkarni { 226a78ce05dSAneesh Kumar K.V struct v9fs_inode *v9inode; 2276e195b0fSDominique Martinet 228fd60b288SMuchun Song v9inode = alloc_inode_sb(sb, v9fs_inode_cache, GFP_KERNEL); 229a78ce05dSAneesh Kumar K.V if (!v9inode) 23060e78d2cSAbhishek Kulkarni return NULL; 231b3cbea03SAneesh Kumar K.V v9inode->cache_validity = 0; 2325a7e0a8cSAneesh Kumar K.V mutex_init(&v9inode->v_mutex); 233874c8ca1SDavid Howells return &v9inode->netfs.inode; 23460e78d2cSAbhishek Kulkarni } 23560e78d2cSAbhishek Kulkarni 23660e78d2cSAbhishek Kulkarni /** 2375e8a0770SAl Viro * v9fs_free_inode - destroy an inode 238bc868036SDavid Howells * @inode: The inode to be freed 23960e78d2cSAbhishek Kulkarni */ 24060e78d2cSAbhishek Kulkarni 2415e8a0770SAl Viro void v9fs_free_inode(struct inode *inode) 242fa0d7e3dSNick Piggin { 243a78ce05dSAneesh Kumar K.V kmem_cache_free(v9fs_inode_cache, V9FS_I(inode)); 244fa0d7e3dSNick Piggin } 245fa0d7e3dSNick Piggin 246bc899ee1SDavid Howells /* 247bc899ee1SDavid Howells * Set parameters for the netfs library 248bc899ee1SDavid Howells */ 249*11a93a73SDavid Howells void v9fs_set_netfs_context(struct inode *inode) 250bc899ee1SDavid Howells { 251e81fb419SLinus Torvalds struct v9fs_inode *v9inode = V9FS_I(inode); 252e81fb419SLinus Torvalds netfs_inode_init(&v9inode->netfs, &v9fs_req_ops); 253bc899ee1SDavid Howells } 254bc899ee1SDavid Howells 2555ffc0cb3SAneesh Kumar K.V int v9fs_init_inode(struct v9fs_session_info *v9ses, 2563eda0de6SAl Viro struct inode *inode, umode_t mode, dev_t rdev) 2572bad8471SEric Van Hensbergen { 2585ffc0cb3SAneesh Kumar K.V int err = 0; 2592bb54115SAbhishek Kulkarni 260f2d40141SChristian Brauner inode_init_owner(&nop_mnt_idmap, inode, NULL, mode); 2612bad8471SEric Van Hensbergen inode->i_blocks = 0; 26245089142SAneesh Kumar K.V inode->i_rdev = rdev; 2634f871800SJeff Layton inode->i_atime = inode->i_mtime = inode_set_ctime_current(inode); 264147b31cfSEric Van Hensbergen inode->i_mapping->a_ops = &v9fs_addr_operations; 265987a6485SGreg Kurz inode->i_private = NULL; 2662bad8471SEric Van Hensbergen 2672bad8471SEric Van Hensbergen switch (mode & S_IFMT) { 2682bad8471SEric Van Hensbergen case S_IFIFO: 2692bad8471SEric Van Hensbergen case S_IFBLK: 2702bad8471SEric Van Hensbergen case S_IFCHR: 2712bad8471SEric Van Hensbergen case S_IFSOCK: 2724b43516aSM. Mohan Kumar if (v9fs_proto_dotl(v9ses)) { 2734b43516aSM. Mohan Kumar inode->i_op = &v9fs_file_inode_operations_dotl; 2744b43516aSM. Mohan Kumar } else if (v9fs_proto_dotu(v9ses)) { 2754b43516aSM. Mohan Kumar inode->i_op = &v9fs_file_inode_operations; 2764b43516aSM. Mohan Kumar } else { 2775d385153SJoe Perches p9_debug(P9_DEBUG_ERROR, 278bd238fb4SLatchesar Ionkov "special files without extended mode\n"); 2792bb54115SAbhishek Kulkarni err = -EINVAL; 2802bb54115SAbhishek Kulkarni goto error; 281b501611aSEric Van Hensbergen } 2822bb54115SAbhishek Kulkarni init_special_inode(inode, inode->i_mode, inode->i_rdev); 2835d58bec5SEric Van Hensbergen break; 2842bad8471SEric Van Hensbergen case S_IFREG: 2859b6533c9SSripathi Kodi if (v9fs_proto_dotl(v9ses)) { 2869b6533c9SSripathi Kodi inode->i_op = &v9fs_file_inode_operations_dotl; 2879b6533c9SSripathi Kodi inode->i_fop = &v9fs_file_operations_dotl; 2889b6533c9SSripathi Kodi } else { 2892bad8471SEric Van Hensbergen inode->i_op = &v9fs_file_inode_operations; 2902bad8471SEric Van Hensbergen inode->i_fop = &v9fs_file_operations; 2919b6533c9SSripathi Kodi } 2929b6533c9SSripathi Kodi 2932bad8471SEric Van Hensbergen break; 294b501611aSEric Van Hensbergen case S_IFLNK: 2959b6533c9SSripathi Kodi if (!v9fs_proto_dotu(v9ses) && !v9fs_proto_dotl(v9ses)) { 2965d385153SJoe Perches p9_debug(P9_DEBUG_ERROR, 2975d385153SJoe Perches "extended modes used with legacy protocol\n"); 2982bb54115SAbhishek Kulkarni err = -EINVAL; 2992bb54115SAbhishek Kulkarni goto error; 300b501611aSEric Van Hensbergen } 3019b6533c9SSripathi Kodi 3029b6533c9SSripathi Kodi if (v9fs_proto_dotl(v9ses)) 3039b6533c9SSripathi Kodi inode->i_op = &v9fs_symlink_inode_operations_dotl; 3049b6533c9SSripathi Kodi else 305b501611aSEric Van Hensbergen inode->i_op = &v9fs_symlink_inode_operations; 3069b6533c9SSripathi Kodi 307b501611aSEric Van Hensbergen break; 3082bad8471SEric Van Hensbergen case S_IFDIR: 309d8c76e6fSDave Hansen inc_nlink(inode); 3109b6533c9SSripathi Kodi if (v9fs_proto_dotl(v9ses)) 3119b6533c9SSripathi Kodi inode->i_op = &v9fs_dir_inode_operations_dotl; 3129b6533c9SSripathi Kodi else if (v9fs_proto_dotu(v9ses)) 3139b6533c9SSripathi Kodi inode->i_op = &v9fs_dir_inode_operations_dotu; 314b501611aSEric Van Hensbergen else 3152bad8471SEric Van Hensbergen inode->i_op = &v9fs_dir_inode_operations; 3169b6533c9SSripathi Kodi 3179b6533c9SSripathi Kodi if (v9fs_proto_dotl(v9ses)) 3189b6533c9SSripathi Kodi inode->i_fop = &v9fs_dir_operations_dotl; 3199b6533c9SSripathi Kodi else 3202bad8471SEric Van Hensbergen inode->i_fop = &v9fs_dir_operations; 3219b6533c9SSripathi Kodi 3222bad8471SEric Van Hensbergen break; 3232bad8471SEric Van Hensbergen default: 324609eac1cSLinus Torvalds p9_debug(P9_DEBUG_ERROR, "BAD mode 0x%hx S_IFMT 0x%x\n", 3252bad8471SEric Van Hensbergen mode, mode & S_IFMT); 3262bb54115SAbhishek Kulkarni err = -EINVAL; 3272bb54115SAbhishek Kulkarni goto error; 3282bad8471SEric Van Hensbergen } 3292bb54115SAbhishek Kulkarni error: 3305ffc0cb3SAneesh Kumar K.V return err; 3315ffc0cb3SAneesh Kumar K.V 3325ffc0cb3SAneesh Kumar K.V } 3335ffc0cb3SAneesh Kumar K.V 3345ffc0cb3SAneesh Kumar K.V /** 3355ffc0cb3SAneesh Kumar K.V * v9fs_get_inode - helper function to setup an inode 3365ffc0cb3SAneesh Kumar K.V * @sb: superblock 3375ffc0cb3SAneesh Kumar K.V * @mode: mode to setup inode with 338bc868036SDavid Howells * @rdev: The device numbers to set 3395ffc0cb3SAneesh Kumar K.V */ 3405ffc0cb3SAneesh Kumar K.V 3413eda0de6SAl Viro struct inode *v9fs_get_inode(struct super_block *sb, umode_t mode, dev_t rdev) 3425ffc0cb3SAneesh Kumar K.V { 3435ffc0cb3SAneesh Kumar K.V int err; 3445ffc0cb3SAneesh Kumar K.V struct inode *inode; 3455ffc0cb3SAneesh Kumar K.V struct v9fs_session_info *v9ses = sb->s_fs_info; 3465ffc0cb3SAneesh Kumar K.V 347609eac1cSLinus Torvalds p9_debug(P9_DEBUG_VFS, "super block: %p mode: %ho\n", sb, mode); 3485ffc0cb3SAneesh Kumar K.V 3495ffc0cb3SAneesh Kumar K.V inode = new_inode(sb); 3505ffc0cb3SAneesh Kumar K.V if (!inode) { 3515d385153SJoe Perches pr_warn("%s (%d): Problem allocating inode\n", 3525d385153SJoe Perches __func__, task_pid_nr(current)); 3535ffc0cb3SAneesh Kumar K.V return ERR_PTR(-ENOMEM); 3545ffc0cb3SAneesh Kumar K.V } 35545089142SAneesh Kumar K.V err = v9fs_init_inode(v9ses, inode, mode, rdev); 3565ffc0cb3SAneesh Kumar K.V if (err) { 3572bb54115SAbhishek Kulkarni iput(inode); 3582bb54115SAbhishek Kulkarni return ERR_PTR(err); 3592bad8471SEric Van Hensbergen } 360*11a93a73SDavid Howells v9fs_set_netfs_context(inode); 3615ffc0cb3SAneesh Kumar K.V return inode; 3625ffc0cb3SAneesh Kumar K.V } 3632bad8471SEric Van Hensbergen 36460e78d2cSAbhishek Kulkarni /** 365bc868036SDavid Howells * v9fs_evict_inode - Remove an inode from the inode cache 36660e78d2cSAbhishek Kulkarni * @inode: inode to release 36760e78d2cSAbhishek Kulkarni * 36860e78d2cSAbhishek Kulkarni */ 369b57922d9SAl Viro void v9fs_evict_inode(struct inode *inode) 37060e78d2cSAbhishek Kulkarni { 3714eb31178SEric Van Hensbergen struct v9fs_inode __maybe_unused *v9inode = V9FS_I(inode); 3724eb31178SEric Van Hensbergen __le32 __maybe_unused version; 3736b39f6d2SAneesh Kumar K.V 3744ad78628SAl Viro truncate_inode_pages_final(&inode->i_data); 3754eb31178SEric Van Hensbergen 3764eb31178SEric Van Hensbergen #ifdef CONFIG_9P_FSCACHE 37793c84614SDavid Howells version = cpu_to_le32(v9inode->qid.version); 37893c84614SDavid Howells fscache_clear_inode_writeback(v9fs_inode_cookie(v9inode), inode, 37993c84614SDavid Howells &version); 3804eb31178SEric Van Hensbergen #endif 3814eb31178SEric Van Hensbergen 382dbd5768fSJan Kara clear_inode(inode); 3834ad78628SAl Viro filemap_fdatawrite(&inode->i_data); 38460e78d2cSAbhishek Kulkarni 3854eb31178SEric Van Hensbergen #ifdef CONFIG_9P_FSCACHE 38624e42e32SDavid Howells fscache_relinquish_cookie(v9fs_inode_cookie(v9inode), false); 3874eb31178SEric Van Hensbergen #endif 3883cf387d7SAneesh Kumar K.V } 38960e78d2cSAbhishek Kulkarni 390fd2421f5SAneesh Kumar K.V static int v9fs_test_inode(struct inode *inode, void *data) 391fd2421f5SAneesh Kumar K.V { 392fd2421f5SAneesh Kumar K.V int umode; 39345089142SAneesh Kumar K.V dev_t rdev; 394fd2421f5SAneesh Kumar K.V struct v9fs_inode *v9inode = V9FS_I(inode); 395fd2421f5SAneesh Kumar K.V struct p9_wstat *st = (struct p9_wstat *)data; 396fd2421f5SAneesh Kumar K.V struct v9fs_session_info *v9ses = v9fs_inode2v9ses(inode); 397fd2421f5SAneesh Kumar K.V 39845089142SAneesh Kumar K.V umode = p9mode2unixmode(v9ses, st, &rdev); 399fd2421f5SAneesh Kumar K.V /* don't match inode of different type */ 4006e3e2c43SAl Viro if (inode_wrong_type(inode, umode)) 401fd2421f5SAneesh Kumar K.V return 0; 402fd2421f5SAneesh Kumar K.V 403fd2421f5SAneesh Kumar K.V /* compare qid details */ 404fd2421f5SAneesh Kumar K.V if (memcmp(&v9inode->qid.version, 405fd2421f5SAneesh Kumar K.V &st->qid.version, sizeof(v9inode->qid.version))) 406fd2421f5SAneesh Kumar K.V return 0; 407fd2421f5SAneesh Kumar K.V 408fd2421f5SAneesh Kumar K.V if (v9inode->qid.type != st->qid.type) 409fd2421f5SAneesh Kumar K.V return 0; 4108ee03163STuomas Tynkkynen 4118ee03163STuomas Tynkkynen if (v9inode->qid.path != st->qid.path) 4128ee03163STuomas Tynkkynen return 0; 413fd2421f5SAneesh Kumar K.V return 1; 414fd2421f5SAneesh Kumar K.V } 415fd2421f5SAneesh Kumar K.V 416ed80fcfaSAneesh Kumar K.V static int v9fs_test_new_inode(struct inode *inode, void *data) 417ed80fcfaSAneesh Kumar K.V { 418ed80fcfaSAneesh Kumar K.V return 0; 419ed80fcfaSAneesh Kumar K.V } 420ed80fcfaSAneesh Kumar K.V 421fd2421f5SAneesh Kumar K.V static int v9fs_set_inode(struct inode *inode, void *data) 422fd2421f5SAneesh Kumar K.V { 423fd2421f5SAneesh Kumar K.V struct v9fs_inode *v9inode = V9FS_I(inode); 424fd2421f5SAneesh Kumar K.V struct p9_wstat *st = (struct p9_wstat *)data; 425fd2421f5SAneesh Kumar K.V 426fd2421f5SAneesh Kumar K.V memcpy(&v9inode->qid, &st->qid, sizeof(st->qid)); 427fd2421f5SAneesh Kumar K.V return 0; 428fd2421f5SAneesh Kumar K.V } 429fd2421f5SAneesh Kumar K.V 4305ffc0cb3SAneesh Kumar K.V static struct inode *v9fs_qid_iget(struct super_block *sb, 4315ffc0cb3SAneesh Kumar K.V struct p9_qid *qid, 432ed80fcfaSAneesh Kumar K.V struct p9_wstat *st, 433ed80fcfaSAneesh Kumar K.V int new) 4345ffc0cb3SAneesh Kumar K.V { 43545089142SAneesh Kumar K.V dev_t rdev; 4363eda0de6SAl Viro int retval; 4373eda0de6SAl Viro umode_t umode; 4385ffc0cb3SAneesh Kumar K.V unsigned long i_ino; 4395ffc0cb3SAneesh Kumar K.V struct inode *inode; 4405ffc0cb3SAneesh Kumar K.V struct v9fs_session_info *v9ses = sb->s_fs_info; 4416e195b0fSDominique Martinet int (*test)(struct inode *inode, void *data); 442ed80fcfaSAneesh Kumar K.V 443ed80fcfaSAneesh Kumar K.V if (new) 444ed80fcfaSAneesh Kumar K.V test = v9fs_test_new_inode; 445ed80fcfaSAneesh Kumar K.V else 446ed80fcfaSAneesh Kumar K.V test = v9fs_test_inode; 4475ffc0cb3SAneesh Kumar K.V 4485ffc0cb3SAneesh Kumar K.V i_ino = v9fs_qid2ino(qid); 449ed80fcfaSAneesh Kumar K.V inode = iget5_locked(sb, i_ino, test, v9fs_set_inode, st); 4505ffc0cb3SAneesh Kumar K.V if (!inode) 4515ffc0cb3SAneesh Kumar K.V return ERR_PTR(-ENOMEM); 4525ffc0cb3SAneesh Kumar K.V if (!(inode->i_state & I_NEW)) 4535ffc0cb3SAneesh Kumar K.V return inode; 4545ffc0cb3SAneesh Kumar K.V /* 4555ffc0cb3SAneesh Kumar K.V * initialize the inode with the stat info 4565ffc0cb3SAneesh Kumar K.V * FIXME!! we may need support for stale inodes 4575ffc0cb3SAneesh Kumar K.V * later. 4585ffc0cb3SAneesh Kumar K.V */ 459fd2421f5SAneesh Kumar K.V inode->i_ino = i_ino; 46045089142SAneesh Kumar K.V umode = p9mode2unixmode(v9ses, st, &rdev); 46145089142SAneesh Kumar K.V retval = v9fs_init_inode(v9ses, inode, umode, rdev); 4625ffc0cb3SAneesh Kumar K.V if (retval) 4635ffc0cb3SAneesh Kumar K.V goto error; 4645ffc0cb3SAneesh Kumar K.V 4655e3cc1eeSHou Tao v9fs_stat2inode(st, inode, sb, 0); 466*11a93a73SDavid Howells v9fs_set_netfs_context(inode); 4675ffc0cb3SAneesh Kumar K.V v9fs_cache_inode_get_cookie(inode); 4685ffc0cb3SAneesh Kumar K.V unlock_new_inode(inode); 4695ffc0cb3SAneesh Kumar K.V return inode; 4705ffc0cb3SAneesh Kumar K.V error: 4710a73d0a2SAl Viro iget_failed(inode); 4725ffc0cb3SAneesh Kumar K.V return ERR_PTR(retval); 4735ffc0cb3SAneesh Kumar K.V 4745ffc0cb3SAneesh Kumar K.V } 4755ffc0cb3SAneesh Kumar K.V 47653c06f4eSAneesh Kumar K.V struct inode * 477a78ce05dSAneesh Kumar K.V v9fs_inode_from_fid(struct v9fs_session_info *v9ses, struct p9_fid *fid, 478ed80fcfaSAneesh Kumar K.V struct super_block *sb, int new) 4796a3124a3SLatchesar Ionkov { 48051a87c55SEric Van Hensbergen struct p9_wstat *st; 4815ffc0cb3SAneesh Kumar K.V struct inode *inode = NULL; 4826a3124a3SLatchesar Ionkov 483bd238fb4SLatchesar Ionkov st = p9_client_stat(fid); 48402bc3567SAbhishek Kulkarni if (IS_ERR(st)) 48502bc3567SAbhishek Kulkarni return ERR_CAST(st); 4862bad8471SEric Van Hensbergen 487ed80fcfaSAneesh Kumar K.V inode = v9fs_qid_iget(sb, &st->qid, st, new); 48802bc3567SAbhishek Kulkarni p9stat_free(st); 489bd238fb4SLatchesar Ionkov kfree(st); 4905ffc0cb3SAneesh Kumar K.V return inode; 4912bad8471SEric Van Hensbergen } 4922bad8471SEric Van Hensbergen 4932bad8471SEric Van Hensbergen /** 494f88657ceSAneesh Kumar K.V * v9fs_at_to_dotl_flags- convert Linux specific AT flags to 495f88657ceSAneesh Kumar K.V * plan 9 AT flag. 496f88657ceSAneesh Kumar K.V * @flags: flags to convert 497f88657ceSAneesh Kumar K.V */ 498f88657ceSAneesh Kumar K.V static int v9fs_at_to_dotl_flags(int flags) 499f88657ceSAneesh Kumar K.V { 500f88657ceSAneesh Kumar K.V int rflags = 0; 5016e195b0fSDominique Martinet 502f88657ceSAneesh Kumar K.V if (flags & AT_REMOVEDIR) 503f88657ceSAneesh Kumar K.V rflags |= P9_DOTL_AT_REMOVEDIR; 5046e195b0fSDominique Martinet 505f88657ceSAneesh Kumar K.V return rflags; 506f88657ceSAneesh Kumar K.V } 507f88657ceSAneesh Kumar K.V 508f88657ceSAneesh Kumar K.V /** 509ac89b2efSEryu Guan * v9fs_dec_count - helper functon to drop i_nlink. 510ac89b2efSEryu Guan * 511ac89b2efSEryu Guan * If a directory had nlink <= 2 (including . and ..), then we should not drop 512ac89b2efSEryu Guan * the link count, which indicates the underlying exported fs doesn't maintain 513ac89b2efSEryu Guan * nlink accurately. e.g. 514ac89b2efSEryu Guan * - overlayfs sets nlink to 1 for merged dir 515ac89b2efSEryu Guan * - ext4 (with dir_nlink feature enabled) sets nlink to 1 if a dir has more 516ac89b2efSEryu Guan * than EXT4_LINK_MAX (65000) links. 517ac89b2efSEryu Guan * 518ac89b2efSEryu Guan * @inode: inode whose nlink is being dropped 519ac89b2efSEryu Guan */ 520ac89b2efSEryu Guan static void v9fs_dec_count(struct inode *inode) 521ac89b2efSEryu Guan { 522ac89b2efSEryu Guan if (!S_ISDIR(inode->i_mode) || inode->i_nlink > 2) 523ac89b2efSEryu Guan drop_nlink(inode); 524ac89b2efSEryu Guan } 525ac89b2efSEryu Guan 526ac89b2efSEryu Guan /** 5272bad8471SEric Van Hensbergen * v9fs_remove - helper function to remove files and directories 52873c592b9SEric Van Hensbergen * @dir: directory inode that is being deleted 52948e370ffSAneesh Kumar K.V * @dentry: dentry that is being deleted 530fd2916bdSFabian Frederick * @flags: removing a directory 5312bad8471SEric Van Hensbergen * 5322bad8471SEric Van Hensbergen */ 5332bad8471SEric Van Hensbergen 53448e370ffSAneesh Kumar K.V static int v9fs_remove(struct inode *dir, struct dentry *dentry, int flags) 5352bad8471SEric Van Hensbergen { 53648e370ffSAneesh Kumar K.V struct inode *inode; 53748e370ffSAneesh Kumar K.V int retval = -EOPNOTSUPP; 53848e370ffSAneesh Kumar K.V struct p9_fid *v9fid, *dfid; 53948e370ffSAneesh Kumar K.V struct v9fs_session_info *v9ses; 5402bad8471SEric Van Hensbergen 5415d385153SJoe Perches p9_debug(P9_DEBUG_VFS, "inode: %p dentry: %p rmdir: %x\n", 54248e370ffSAneesh Kumar K.V dir, dentry, flags); 5432bad8471SEric Van Hensbergen 54448e370ffSAneesh Kumar K.V v9ses = v9fs_inode2v9ses(dir); 5452b0143b5SDavid Howells inode = d_inode(dentry); 54677d5a6b7SAl Viro dfid = v9fs_parent_fid(dentry); 54748e370ffSAneesh Kumar K.V if (IS_ERR(dfid)) { 54848e370ffSAneesh Kumar K.V retval = PTR_ERR(dfid); 5495d385153SJoe Perches p9_debug(P9_DEBUG_VFS, "fid lookup failed %d\n", retval); 55048e370ffSAneesh Kumar K.V return retval; 55148e370ffSAneesh Kumar K.V } 55248e370ffSAneesh Kumar K.V if (v9fs_proto_dotl(v9ses)) 553f88657ceSAneesh Kumar K.V retval = p9_client_unlinkat(dfid, dentry->d_name.name, 554f88657ceSAneesh Kumar K.V v9fs_at_to_dotl_flags(flags)); 555b48dbb99SDominique Martinet p9_fid_put(dfid); 55648e370ffSAneesh Kumar K.V if (retval == -EOPNOTSUPP) { 55748e370ffSAneesh Kumar K.V /* Try the one based on path */ 55848e370ffSAneesh Kumar K.V v9fid = v9fs_fid_clone(dentry); 559da977b2cSEric Van Hensbergen if (IS_ERR(v9fid)) 560da977b2cSEric Van Hensbergen return PTR_ERR(v9fid); 561d994f405SAneesh Kumar K.V retval = p9_client_remove(v9fid); 56248e370ffSAneesh Kumar K.V } 563b271ec47SAneesh Kumar K.V if (!retval) { 564b271ec47SAneesh Kumar K.V /* 565b271ec47SAneesh Kumar K.V * directories on unlink should have zero 566b271ec47SAneesh Kumar K.V * link count 567b271ec47SAneesh Kumar K.V */ 56848e370ffSAneesh Kumar K.V if (flags & AT_REMOVEDIR) { 56948e370ffSAneesh Kumar K.V clear_nlink(inode); 570ac89b2efSEryu Guan v9fs_dec_count(dir); 571b271ec47SAneesh Kumar K.V } else 572ac89b2efSEryu Guan v9fs_dec_count(inode); 573d28c61f0SAneesh Kumar K.V 57448e370ffSAneesh Kumar K.V v9fs_invalidate_inode_attr(inode); 575d28c61f0SAneesh Kumar K.V v9fs_invalidate_inode_attr(dir); 576154372e6SEric Van Hensbergen 577154372e6SEric Van Hensbergen /* invalidate all fids associated with dentry */ 578154372e6SEric Van Hensbergen /* NOTE: This will not include open fids */ 579154372e6SEric Van Hensbergen dentry->d_op->d_release(dentry); 580b271ec47SAneesh Kumar K.V } 581d994f405SAneesh Kumar K.V return retval; 5822bad8471SEric Van Hensbergen } 5832bad8471SEric Van Hensbergen 584bd238fb4SLatchesar Ionkov /** 585bd238fb4SLatchesar Ionkov * v9fs_create - Create a file 586ee443996SEric Van Hensbergen * @v9ses: session information 587ee443996SEric Van Hensbergen * @dir: directory that dentry is being created in 588bd238fb4SLatchesar Ionkov * @dentry: dentry that is being created 5890e15597eSAbhishek Kulkarni * @extension: 9p2000.u extension string to support devices, etc. 590bd238fb4SLatchesar Ionkov * @perm: create permissions 591bd238fb4SLatchesar Ionkov * @mode: open mode 592bd238fb4SLatchesar Ionkov * 593bd238fb4SLatchesar Ionkov */ 594bd238fb4SLatchesar Ionkov static struct p9_fid * 595bd238fb4SLatchesar Ionkov v9fs_create(struct v9fs_session_info *v9ses, struct inode *dir, 596bd238fb4SLatchesar Ionkov struct dentry *dentry, char *extension, u32 perm, u8 mode) 597bd238fb4SLatchesar Ionkov { 598bd238fb4SLatchesar Ionkov int err; 5997880b43bSAl Viro const unsigned char *name; 6006636b6dcSJianyong Wu struct p9_fid *dfid, *ofid = NULL, *fid = NULL; 601bd238fb4SLatchesar Ionkov struct inode *inode; 602bd238fb4SLatchesar Ionkov 6034b8e9923SAl Viro p9_debug(P9_DEBUG_VFS, "name %pd\n", dentry); 60451a87c55SEric Van Hensbergen 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); 618dafbe689SDominique Martinet goto error; 619bd238fb4SLatchesar Ionkov } 620bd238fb4SLatchesar Ionkov 621bd238fb4SLatchesar Ionkov err = p9_client_fcreate(ofid, name, perm, mode, extension); 62251a87c55SEric Van Hensbergen if (err < 0) { 6235d385153SJoe Perches p9_debug(P9_DEBUG_VFS, "p9_client_fcreate failed %d\n", err); 624bd238fb4SLatchesar Ionkov goto error; 62551a87c55SEric Van Hensbergen } 626bd238fb4SLatchesar Ionkov 627b6054793SAneesh Kumar K.V if (!(perm & P9_DMLINK)) { 628bd238fb4SLatchesar Ionkov /* now walk from the parent so we can get unopened fid */ 6296d27e64dSVenkateswararao Jujjuri fid = p9_client_walk(dfid, 1, &name, 1); 630bd238fb4SLatchesar Ionkov if (IS_ERR(fid)) { 631bd238fb4SLatchesar Ionkov err = PTR_ERR(fid); 632b6054793SAneesh Kumar K.V p9_debug(P9_DEBUG_VFS, 633b6054793SAneesh Kumar K.V "p9_client_walk failed %d\n", err); 634bd238fb4SLatchesar Ionkov goto error; 6356d27e64dSVenkateswararao Jujjuri } 636b6054793SAneesh Kumar K.V /* 637b6054793SAneesh Kumar K.V * instantiate inode and assign the unopened fid to the dentry 638b6054793SAneesh Kumar K.V */ 639ed80fcfaSAneesh Kumar K.V inode = v9fs_get_new_inode_from_fid(v9ses, fid, dir->i_sb); 640bd238fb4SLatchesar Ionkov if (IS_ERR(inode)) { 641bd238fb4SLatchesar Ionkov err = PTR_ERR(inode); 642b6054793SAneesh Kumar K.V p9_debug(P9_DEBUG_VFS, 643b6054793SAneesh Kumar K.V "inode creation failed %d\n", err); 644bd238fb4SLatchesar Ionkov goto error; 645bd238fb4SLatchesar Ionkov } 646dafbe689SDominique Martinet v9fs_fid_add(dentry, &fid); 6475441ae5eSAneesh Kumar K.V d_instantiate(dentry, inode); 648b6054793SAneesh Kumar K.V } 649b48dbb99SDominique Martinet p9_fid_put(dfid); 650bd238fb4SLatchesar Ionkov return ofid; 651bd238fb4SLatchesar Ionkov error: 652dafbe689SDominique Martinet p9_fid_put(dfid); 653b48dbb99SDominique Martinet p9_fid_put(ofid); 654b48dbb99SDominique Martinet p9_fid_put(fid); 655bd238fb4SLatchesar Ionkov return ERR_PTR(err); 656bd238fb4SLatchesar Ionkov } 657bd238fb4SLatchesar Ionkov 6582bad8471SEric Van Hensbergen /** 659e43ae79cSMiklos Szeredi * v9fs_vfs_create - VFS hook to create a regular file 6606c960e68SChristian Brauner * @idmap: idmap of the mount 661bc868036SDavid Howells * @dir: The parent directory 662bc868036SDavid Howells * @dentry: The name of file to be created 663bc868036SDavid Howells * @mode: The UNIX file mode to set 664bc868036SDavid Howells * @excl: True if the file must not yet exist 665e43ae79cSMiklos Szeredi * 666e43ae79cSMiklos Szeredi * open(.., O_CREAT) is handled in v9fs_vfs_atomic_open(). This is only called 667e43ae79cSMiklos Szeredi * for mknod(2). 668e43ae79cSMiklos Szeredi * 6692bad8471SEric Van Hensbergen */ 6702bad8471SEric Van Hensbergen 6712bad8471SEric Van Hensbergen static int 6726c960e68SChristian Brauner v9fs_vfs_create(struct mnt_idmap *idmap, struct inode *dir, 673549c7297SChristian Brauner struct dentry *dentry, umode_t mode, bool excl) 6742bad8471SEric Van Hensbergen { 675e43ae79cSMiklos Szeredi struct v9fs_session_info *v9ses = v9fs_inode2v9ses(dir); 676e43ae79cSMiklos Szeredi u32 perm = unixmode2p9mode(v9ses, mode); 677e43ae79cSMiklos Szeredi struct p9_fid *fid; 6786a3124a3SLatchesar Ionkov 679e43ae79cSMiklos Szeredi /* P9_OEXCL? */ 680e43ae79cSMiklos Szeredi fid = v9fs_create(v9ses, dir, dentry, NULL, perm, P9_ORDWR); 681e43ae79cSMiklos Szeredi if (IS_ERR(fid)) 682e43ae79cSMiklos Szeredi return PTR_ERR(fid); 6836a3124a3SLatchesar Ionkov 684d28c61f0SAneesh Kumar K.V v9fs_invalidate_inode_attr(dir); 685b48dbb99SDominique Martinet p9_fid_put(fid); 6866a3124a3SLatchesar Ionkov 6876a3124a3SLatchesar Ionkov return 0; 6882bad8471SEric Van Hensbergen } 6892bad8471SEric Van Hensbergen 6902bad8471SEric Van Hensbergen /** 6912bad8471SEric Van Hensbergen * v9fs_vfs_mkdir - VFS mkdir hook to create a directory 692c54bd91eSChristian Brauner * @idmap: idmap of the mount 693ee443996SEric Van Hensbergen * @dir: inode that is being unlinked 6942bad8471SEric Van Hensbergen * @dentry: dentry that is being unlinked 6952bad8471SEric Van Hensbergen * @mode: mode for new directory 6962bad8471SEric Van Hensbergen * 6972bad8471SEric Van Hensbergen */ 6982bad8471SEric Van Hensbergen 699c54bd91eSChristian Brauner static int v9fs_vfs_mkdir(struct mnt_idmap *idmap, struct inode *dir, 700549c7297SChristian Brauner struct dentry *dentry, umode_t mode) 7012bad8471SEric Van Hensbergen { 7026a3124a3SLatchesar Ionkov int err; 703bd238fb4SLatchesar Ionkov u32 perm; 704bd238fb4SLatchesar Ionkov struct p9_fid *fid; 705d28c61f0SAneesh Kumar K.V struct v9fs_session_info *v9ses; 7066a3124a3SLatchesar Ionkov 7074b8e9923SAl Viro p9_debug(P9_DEBUG_VFS, "name %pd\n", dentry); 708bd238fb4SLatchesar Ionkov err = 0; 7096a3124a3SLatchesar Ionkov v9ses = v9fs_inode2v9ses(dir); 7106a3124a3SLatchesar Ionkov perm = unixmode2p9mode(v9ses, mode | S_IFDIR); 711bd238fb4SLatchesar Ionkov fid = v9fs_create(v9ses, dir, dentry, NULL, perm, P9_OREAD); 712bd238fb4SLatchesar Ionkov if (IS_ERR(fid)) { 713bd238fb4SLatchesar Ionkov err = PTR_ERR(fid); 714bd238fb4SLatchesar Ionkov fid = NULL; 715d28c61f0SAneesh Kumar K.V } else { 716b271ec47SAneesh Kumar K.V inc_nlink(dir); 717d28c61f0SAneesh Kumar K.V v9fs_invalidate_inode_attr(dir); 718d28c61f0SAneesh Kumar K.V } 7196a3124a3SLatchesar Ionkov 720bd238fb4SLatchesar Ionkov if (fid) 721b48dbb99SDominique Martinet p9_fid_put(fid); 7226a3124a3SLatchesar Ionkov 7236a3124a3SLatchesar Ionkov return err; 7242bad8471SEric Van Hensbergen } 7252bad8471SEric Van Hensbergen 7262bad8471SEric Van Hensbergen /** 7272bad8471SEric Van Hensbergen * v9fs_vfs_lookup - VFS lookup hook to "walk" to a new inode 7282bad8471SEric Van Hensbergen * @dir: inode that is being walked from 7292bad8471SEric Van Hensbergen * @dentry: dentry that is being walked to? 730fd2916bdSFabian Frederick * @flags: lookup flags (unused) 7312bad8471SEric Van Hensbergen * 7322bad8471SEric Van Hensbergen */ 7332bad8471SEric Van Hensbergen 73453c06f4eSAneesh Kumar K.V struct dentry *v9fs_vfs_lookup(struct inode *dir, struct dentry *dentry, 73500cd8dd3SAl Viro unsigned int flags) 7362bad8471SEric Van Hensbergen { 73773f50717SAneesh Kumar K.V struct dentry *res; 7382bad8471SEric Van Hensbergen struct v9fs_session_info *v9ses; 739bd238fb4SLatchesar Ionkov struct p9_fid *dfid, *fid; 7402bad8471SEric Van Hensbergen struct inode *inode; 7417880b43bSAl Viro const unsigned char *name; 7422bad8471SEric Van Hensbergen 7434b8e9923SAl Viro p9_debug(P9_DEBUG_VFS, "dir: %p dentry: (%pd) %p flags: %x\n", 7444b8e9923SAl Viro dir, dentry, dentry, flags); 7452bad8471SEric Van Hensbergen 74611e9b49bSSripathi Kodi if (dentry->d_name.len > NAME_MAX) 74711e9b49bSSripathi Kodi return ERR_PTR(-ENAMETOOLONG); 74811e9b49bSSripathi Kodi 7492bad8471SEric Van Hensbergen v9ses = v9fs_inode2v9ses(dir); 750a534c8d1SAneesh Kumar K.V /* We can walk d_parent because we hold the dir->i_mutex */ 75177d5a6b7SAl Viro dfid = v9fs_parent_fid(dentry); 752bd238fb4SLatchesar Ionkov if (IS_ERR(dfid)) 753e231c2eeSDavid Howells return ERR_CAST(dfid); 7542bad8471SEric Van Hensbergen 75573f50717SAneesh Kumar K.V /* 75673f50717SAneesh Kumar K.V * Make sure we don't use a wrong inode due to parallel 75773f50717SAneesh Kumar K.V * unlink. For cached mode create calls request for new 75873f50717SAneesh Kumar K.V * inode. But with cache disabled, lookup should do this. 75973f50717SAneesh Kumar K.V */ 760500e2ab6SAl Viro name = dentry->d_name.name; 761500e2ab6SAl Viro fid = p9_client_walk(dfid, 1, &name, 1); 762b48dbb99SDominique Martinet p9_fid_put(dfid); 763500e2ab6SAl Viro if (fid == ERR_PTR(-ENOENT)) 764500e2ab6SAl Viro inode = NULL; 765500e2ab6SAl Viro else if (IS_ERR(fid)) 766500e2ab6SAl Viro inode = ERR_CAST(fid); 7674eb31178SEric Van Hensbergen else if (v9ses->cache & (CACHE_META|CACHE_LOOSE)) 768a78ce05dSAneesh Kumar K.V inode = v9fs_get_inode_from_fid(v9ses, fid, dir->i_sb); 76973f50717SAneesh Kumar K.V else 77073f50717SAneesh Kumar K.V inode = v9fs_get_new_inode_from_fid(v9ses, fid, dir->i_sb); 77173f50717SAneesh Kumar K.V /* 77273f50717SAneesh Kumar K.V * If we had a rename on the server and a parallel lookup 77373f50717SAneesh Kumar K.V * for the new name, then make sure we instantiate with 77473f50717SAneesh Kumar K.V * the new name. ie look up for a/b, while on server somebody 77573f50717SAneesh Kumar K.V * moved b under k and client parallely did a lookup for 77673f50717SAneesh Kumar K.V * k/b. 77773f50717SAneesh Kumar K.V */ 77841d28bcaSAl Viro res = d_splice_alias(inode, dentry); 779500e2ab6SAl Viro if (!IS_ERR(fid)) { 780a3b2157eSAl Viro if (!res) 781dafbe689SDominique Martinet v9fs_fid_add(dentry, &fid); 782a3b2157eSAl Viro else if (!IS_ERR(res)) 783dafbe689SDominique Martinet v9fs_fid_add(res, &fid); 784a3b2157eSAl Viro else 785b48dbb99SDominique Martinet p9_fid_put(fid); 786500e2ab6SAl Viro } 7877b5be621SAl Viro return res; 7882bad8471SEric Van Hensbergen } 7892bad8471SEric Van Hensbergen 790d9585277SAl Viro static int 791e43ae79cSMiklos Szeredi v9fs_vfs_atomic_open(struct inode *dir, struct dentry *dentry, 7926e195b0fSDominique Martinet struct file *file, unsigned int flags, umode_t mode) 793e43ae79cSMiklos Szeredi { 794e43ae79cSMiklos Szeredi int err; 795e43ae79cSMiklos Szeredi u32 perm; 7964eb31178SEric Van Hensbergen struct v9fs_inode __maybe_unused *v9inode; 797e43ae79cSMiklos Szeredi struct v9fs_session_info *v9ses; 7981543b4c5SEric Van Hensbergen struct p9_fid *fid; 799e43ae79cSMiklos Szeredi struct dentry *res = NULL; 800987a6485SGreg Kurz struct inode *inode; 8011543b4c5SEric Van Hensbergen int p9_omode; 802e43ae79cSMiklos Szeredi 80300699ad8SAl Viro if (d_in_lookup(dentry)) { 80400cd8dd3SAl Viro res = v9fs_vfs_lookup(dir, dentry, 0); 805e43ae79cSMiklos Szeredi if (IS_ERR(res)) 806d9585277SAl Viro return PTR_ERR(res); 807e43ae79cSMiklos Szeredi 808e43ae79cSMiklos Szeredi if (res) 809e43ae79cSMiklos Szeredi dentry = res; 810e43ae79cSMiklos Szeredi } 811e43ae79cSMiklos Szeredi 812e43ae79cSMiklos Szeredi /* Only creates */ 8132b0143b5SDavid Howells if (!(flags & O_CREAT) || d_really_is_positive(dentry)) 814e45198a6SAl Viro return finish_no_open(file, res); 815e43ae79cSMiklos Szeredi 816e43ae79cSMiklos Szeredi v9ses = v9fs_inode2v9ses(dir); 817e43ae79cSMiklos Szeredi perm = unixmode2p9mode(v9ses, mode); 8181543b4c5SEric Van Hensbergen p9_omode = v9fs_uflags2omode(flags, v9fs_proto_dotu(v9ses)); 8191543b4c5SEric Van Hensbergen 8204eb31178SEric Van Hensbergen if ((v9ses->cache & CACHE_WRITEBACK) && (p9_omode & P9_OWRITE)) { 82121e26d5eSEric Van Hensbergen p9_omode = (p9_omode & ~P9_OWRITE) | P9_ORDWR; 8221543b4c5SEric Van Hensbergen p9_debug(P9_DEBUG_CACHE, 8231543b4c5SEric Van Hensbergen "write-only file with writeback enabled, creating w/ O_RDWR\n"); 8241543b4c5SEric Van Hensbergen } 8251543b4c5SEric Van Hensbergen fid = v9fs_create(v9ses, dir, dentry, NULL, perm, p9_omode); 826e43ae79cSMiklos Szeredi if (IS_ERR(fid)) { 827e43ae79cSMiklos Szeredi err = PTR_ERR(fid); 828e43ae79cSMiklos Szeredi goto error; 829e43ae79cSMiklos Szeredi } 830e43ae79cSMiklos Szeredi 831e43ae79cSMiklos Szeredi v9fs_invalidate_inode_attr(dir); 832987a6485SGreg Kurz inode = d_inode(dentry); 833987a6485SGreg Kurz v9inode = V9FS_I(inode); 834be12af3eSAl Viro err = finish_open(file, dentry, generic_file_open); 83530d90494SAl Viro if (err) 836e43ae79cSMiklos Szeredi goto error; 837e43ae79cSMiklos Szeredi 83830d90494SAl Viro file->private_data = fid; 8394eb31178SEric Van Hensbergen #ifdef CONFIG_9P_FSCACHE 8404eb31178SEric Van Hensbergen if (v9ses->cache & CACHE_FSCACHE) 84124e42e32SDavid Howells fscache_use_cookie(v9fs_inode_cookie(v9inode), 84224e42e32SDavid Howells file->f_mode & FMODE_WRITE); 8434eb31178SEric Van Hensbergen #endif 8441543b4c5SEric Van Hensbergen 8451543b4c5SEric Van Hensbergen v9fs_fid_add_modes(fid, v9ses->flags, v9ses->cache, file->f_flags); 846dafbe689SDominique Martinet v9fs_open_fid_add(inode, &fid); 847e43ae79cSMiklos Szeredi 84873a09dd9SAl Viro file->f_mode |= FMODE_CREATED; 849e43ae79cSMiklos Szeredi out: 850e43ae79cSMiklos Szeredi dput(res); 851d9585277SAl Viro return err; 852e43ae79cSMiklos Szeredi 853e43ae79cSMiklos Szeredi error: 854b48dbb99SDominique Martinet p9_fid_put(fid); 855e43ae79cSMiklos Szeredi goto out; 856e43ae79cSMiklos Szeredi } 857e43ae79cSMiklos Szeredi 8582bad8471SEric Van Hensbergen /** 8592bad8471SEric Van Hensbergen * v9fs_vfs_unlink - VFS unlink hook to delete an inode 8602bad8471SEric Van Hensbergen * @i: inode that is being unlinked 86173c592b9SEric Van Hensbergen * @d: dentry that is being unlinked 8622bad8471SEric Van Hensbergen * 8632bad8471SEric Van Hensbergen */ 8642bad8471SEric Van Hensbergen 86553c06f4eSAneesh Kumar K.V int v9fs_vfs_unlink(struct inode *i, struct dentry *d) 8662bad8471SEric Van Hensbergen { 8672bad8471SEric Van Hensbergen return v9fs_remove(i, d, 0); 8682bad8471SEric Van Hensbergen } 8692bad8471SEric Van Hensbergen 8702bad8471SEric Van Hensbergen /** 8712bad8471SEric Van Hensbergen * v9fs_vfs_rmdir - VFS unlink hook to delete a directory 8722bad8471SEric Van Hensbergen * @i: inode that is being unlinked 87373c592b9SEric Van Hensbergen * @d: dentry that is being unlinked 8742bad8471SEric Van Hensbergen * 8752bad8471SEric Van Hensbergen */ 8762bad8471SEric Van Hensbergen 87753c06f4eSAneesh Kumar K.V int v9fs_vfs_rmdir(struct inode *i, struct dentry *d) 8782bad8471SEric Van Hensbergen { 87948e370ffSAneesh Kumar K.V return v9fs_remove(i, d, AT_REMOVEDIR); 8802bad8471SEric Van Hensbergen } 8812bad8471SEric Van Hensbergen 8822bad8471SEric Van Hensbergen /** 8832bad8471SEric Van Hensbergen * v9fs_vfs_rename - VFS hook to rename an inode 884e18275aeSChristian Brauner * @idmap: The idmap of the mount 8852bad8471SEric Van Hensbergen * @old_dir: old dir inode 8862bad8471SEric Van Hensbergen * @old_dentry: old dentry 8872bad8471SEric Van Hensbergen * @new_dir: new dir inode 8882bad8471SEric Van Hensbergen * @new_dentry: new dentry 889bc868036SDavid Howells * @flags: RENAME_* flags 8902bad8471SEric Van Hensbergen * 8912bad8471SEric Van Hensbergen */ 8922bad8471SEric Van Hensbergen 89353c06f4eSAneesh Kumar K.V int 894e18275aeSChristian Brauner v9fs_vfs_rename(struct mnt_idmap *idmap, struct inode *old_dir, 895549c7297SChristian Brauner struct dentry *old_dentry, struct inode *new_dir, 896549c7297SChristian Brauner struct dentry *new_dentry, unsigned int flags) 8972bad8471SEric Van Hensbergen { 898d28c61f0SAneesh Kumar K.V int retval; 899bd238fb4SLatchesar Ionkov struct inode *old_inode; 900b271ec47SAneesh Kumar K.V struct inode *new_inode; 901bd238fb4SLatchesar Ionkov struct v9fs_session_info *v9ses; 902dafbe689SDominique Martinet struct p9_fid *oldfid = NULL, *dfid = NULL; 903dafbe689SDominique Martinet struct p9_fid *olddirfid = NULL; 904dafbe689SDominique Martinet struct p9_fid *newdirfid = NULL; 905bd238fb4SLatchesar Ionkov struct p9_wstat wstat; 9062bad8471SEric Van Hensbergen 9071cd66c93SMiklos Szeredi if (flags) 9081cd66c93SMiklos Szeredi return -EINVAL; 9091cd66c93SMiklos Szeredi 9105d385153SJoe Perches p9_debug(P9_DEBUG_VFS, "\n"); 9112b0143b5SDavid Howells old_inode = d_inode(old_dentry); 9122b0143b5SDavid Howells new_inode = d_inode(new_dentry); 913bd238fb4SLatchesar Ionkov v9ses = v9fs_inode2v9ses(old_inode); 914bd238fb4SLatchesar Ionkov oldfid = v9fs_fid_lookup(old_dentry); 915da977b2cSEric Van Hensbergen if (IS_ERR(oldfid)) 916da977b2cSEric Van Hensbergen return PTR_ERR(oldfid); 917da977b2cSEric Van Hensbergen 9186636b6dcSJianyong Wu dfid = v9fs_parent_fid(old_dentry); 9196636b6dcSJianyong Wu olddirfid = clone_fid(dfid); 920b48dbb99SDominique Martinet p9_fid_put(dfid); 921dafbe689SDominique Martinet dfid = NULL; 9226636b6dcSJianyong Wu 923da977b2cSEric Van Hensbergen if (IS_ERR(olddirfid)) { 924da977b2cSEric Van Hensbergen retval = PTR_ERR(olddirfid); 925dafbe689SDominique Martinet goto error; 926da977b2cSEric Van Hensbergen } 927da977b2cSEric Van Hensbergen 9286636b6dcSJianyong Wu dfid = v9fs_parent_fid(new_dentry); 9296636b6dcSJianyong Wu newdirfid = clone_fid(dfid); 930b48dbb99SDominique Martinet p9_fid_put(dfid); 931dafbe689SDominique Martinet dfid = NULL; 9326636b6dcSJianyong Wu 933da977b2cSEric Van Hensbergen if (IS_ERR(newdirfid)) { 934da977b2cSEric Van Hensbergen retval = PTR_ERR(newdirfid); 935dafbe689SDominique Martinet goto error; 9362bad8471SEric Van Hensbergen } 9372bad8471SEric Van Hensbergen 938a534c8d1SAneesh Kumar K.V down_write(&v9ses->rename_sem); 9394681dbdaSSripathi Kodi if (v9fs_proto_dotl(v9ses)) { 9409e8fb38eSAneesh Kumar K.V retval = p9_client_renameat(olddirfid, old_dentry->d_name.name, 9419e8fb38eSAneesh Kumar K.V newdirfid, new_dentry->d_name.name); 9429e8fb38eSAneesh Kumar K.V if (retval == -EOPNOTSUPP) 9434681dbdaSSripathi Kodi retval = p9_client_rename(oldfid, newdirfid, 9449e8fb38eSAneesh Kumar K.V new_dentry->d_name.name); 9459e8fb38eSAneesh Kumar K.V if (retval != -EOPNOTSUPP) 946dafbe689SDominique Martinet goto error_locked; 9474681dbdaSSripathi Kodi } 948a534c8d1SAneesh Kumar K.V if (old_dentry->d_parent != new_dentry->d_parent) { 949a534c8d1SAneesh Kumar K.V /* 950a534c8d1SAneesh Kumar K.V * 9P .u can only handle file rename in the same directory 951a534c8d1SAneesh Kumar K.V */ 9524681dbdaSSripathi Kodi 9535d385153SJoe Perches p9_debug(P9_DEBUG_ERROR, "old dir and new dir are different\n"); 954621997cdSEric Van Hensbergen retval = -EXDEV; 955dafbe689SDominique Martinet goto error_locked; 9562bad8471SEric Van Hensbergen } 957531b1094SLatchesar Ionkov v9fs_blank_wstat(&wstat); 958ba17674fSLatchesar Ionkov wstat.muid = v9ses->uname; 9597880b43bSAl Viro wstat.name = new_dentry->d_name.name; 960bd238fb4SLatchesar Ionkov retval = p9_client_wstat(oldfid, &wstat); 9612bad8471SEric Van Hensbergen 962dafbe689SDominique Martinet error_locked: 963b271ec47SAneesh Kumar K.V if (!retval) { 964b271ec47SAneesh Kumar K.V if (new_inode) { 965b271ec47SAneesh Kumar K.V if (S_ISDIR(new_inode->i_mode)) 966b271ec47SAneesh Kumar K.V clear_nlink(new_inode); 967b271ec47SAneesh Kumar K.V else 968ac89b2efSEryu Guan v9fs_dec_count(new_inode); 969b271ec47SAneesh Kumar K.V } 970b271ec47SAneesh Kumar K.V if (S_ISDIR(old_inode->i_mode)) { 971b271ec47SAneesh Kumar K.V if (!new_inode) 972b271ec47SAneesh Kumar K.V inc_nlink(new_dir); 973ac89b2efSEryu Guan v9fs_dec_count(old_dir); 974b271ec47SAneesh Kumar K.V } 9753bc86de3SAneesh Kumar K.V v9fs_invalidate_inode_attr(old_inode); 976d28c61f0SAneesh Kumar K.V v9fs_invalidate_inode_attr(old_dir); 977d28c61f0SAneesh Kumar K.V v9fs_invalidate_inode_attr(new_dir); 9783bc86de3SAneesh Kumar K.V 979a534c8d1SAneesh Kumar K.V /* successful rename */ 980a534c8d1SAneesh Kumar K.V d_move(old_dentry, new_dentry); 981b271ec47SAneesh Kumar K.V } 982a534c8d1SAneesh Kumar K.V up_write(&v9ses->rename_sem); 983dafbe689SDominique Martinet 984dafbe689SDominique Martinet error: 985b48dbb99SDominique Martinet p9_fid_put(newdirfid); 986b48dbb99SDominique Martinet p9_fid_put(olddirfid); 987b48dbb99SDominique Martinet p9_fid_put(oldfid); 9882bad8471SEric Van Hensbergen return retval; 9892bad8471SEric Van Hensbergen } 9902bad8471SEric Van Hensbergen 9912bad8471SEric Van Hensbergen /** 992943ffb58SAdrian Bunk * v9fs_vfs_getattr - retrieve file metadata 993b74d24f7SChristian Brauner * @idmap: idmap of the mount 994a528d35eSDavid Howells * @path: Object to query 995ee443996SEric Van Hensbergen * @stat: metadata structure to populate 996a528d35eSDavid Howells * @request_mask: Mask of STATX_xxx flags indicating the caller's interests 997a528d35eSDavid Howells * @flags: AT_STATX_xxx setting 9982bad8471SEric Van Hensbergen * 9992bad8471SEric Van Hensbergen */ 10002bad8471SEric Van Hensbergen 10012bad8471SEric Van Hensbergen static int 1002b74d24f7SChristian Brauner v9fs_vfs_getattr(struct mnt_idmap *idmap, const struct path *path, 1003549c7297SChristian Brauner struct kstat *stat, u32 request_mask, unsigned int flags) 10042bad8471SEric Van Hensbergen { 1005a528d35eSDavid Howells struct dentry *dentry = path->dentry; 1006d9bc0d11SEric Van Hensbergen struct inode *inode = d_inode(dentry); 1007bd238fb4SLatchesar Ionkov struct v9fs_session_info *v9ses; 1008bd238fb4SLatchesar Ionkov struct p9_fid *fid; 100951a87c55SEric Van Hensbergen struct p9_wstat *st; 10102bad8471SEric Van Hensbergen 10115d385153SJoe Perches p9_debug(P9_DEBUG_VFS, "dentry: %p\n", dentry); 101242869c8aSAneesh Kumar K.V v9ses = v9fs_dentry2v9ses(dentry); 10134eb31178SEric Van Hensbergen if (v9ses->cache & (CACHE_META|CACHE_LOOSE)) { 10140d72b928SJeff Layton generic_fillattr(&nop_mnt_idmap, request_mask, inode, stat); 1015a1211908SAneesh Kumar K.V return 0; 10164eb31178SEric Van Hensbergen } else if (v9ses->cache & CACHE_WRITEBACK) { 1017d9bc0d11SEric Van Hensbergen if (S_ISREG(inode->i_mode)) { 1018d9bc0d11SEric Van Hensbergen int retval = filemap_fdatawrite(inode->i_mapping); 1019d9bc0d11SEric Van Hensbergen 1020d9bc0d11SEric Van Hensbergen if (retval) 1021d9bc0d11SEric Van Hensbergen p9_debug(P9_DEBUG_ERROR, 1022d9bc0d11SEric Van Hensbergen "flushing writeback during getattr returned %d\n", retval); 1023d9bc0d11SEric Van Hensbergen } 1024a1211908SAneesh Kumar K.V } 1025bd238fb4SLatchesar Ionkov fid = v9fs_fid_lookup(dentry); 1026da977b2cSEric Van Hensbergen if (IS_ERR(fid)) 1027da977b2cSEric Van Hensbergen return PTR_ERR(fid); 10282bad8471SEric Van Hensbergen 1029bd238fb4SLatchesar Ionkov st = p9_client_stat(fid); 1030b48dbb99SDominique Martinet p9_fid_put(fid); 1031bd238fb4SLatchesar Ionkov if (IS_ERR(st)) 1032bd238fb4SLatchesar Ionkov return PTR_ERR(st); 10332bad8471SEric Van Hensbergen 10345e3cc1eeSHou Tao v9fs_stat2inode(st, d_inode(dentry), dentry->d_sb, 0); 10350d72b928SJeff Layton generic_fillattr(&nop_mnt_idmap, request_mask, d_inode(dentry), stat); 10362bad8471SEric Van Hensbergen 103762b2be59SLatchesar Ionkov p9stat_free(st); 1038bd238fb4SLatchesar Ionkov kfree(st); 1039bd238fb4SLatchesar Ionkov return 0; 10402bad8471SEric Van Hensbergen } 10412bad8471SEric Van Hensbergen 10422bad8471SEric Van Hensbergen /** 10432bad8471SEric Van Hensbergen * v9fs_vfs_setattr - set file metadata 1044c1632a0fSChristian Brauner * @idmap: idmap of the mount 10452bad8471SEric Van Hensbergen * @dentry: file whose metadata to set 10462bad8471SEric Van Hensbergen * @iattr: metadata assignment structure 10472bad8471SEric Van Hensbergen * 10482bad8471SEric Van Hensbergen */ 10492bad8471SEric Van Hensbergen 1050c1632a0fSChristian Brauner static int v9fs_vfs_setattr(struct mnt_idmap *idmap, 1051549c7297SChristian Brauner struct dentry *dentry, struct iattr *iattr) 10522bad8471SEric Van Hensbergen { 10536636b6dcSJianyong Wu int retval, use_dentry = 0; 105424e42e32SDavid Howells struct inode *inode = d_inode(dentry); 1055bd238fb4SLatchesar Ionkov struct v9fs_session_info *v9ses; 105666246641SJianyong Wu struct p9_fid *fid = NULL; 1057bd238fb4SLatchesar Ionkov struct p9_wstat wstat; 10582bad8471SEric Van Hensbergen 10595d385153SJoe Perches p9_debug(P9_DEBUG_VFS, "\n"); 1060c1632a0fSChristian Brauner retval = setattr_prepare(&nop_mnt_idmap, dentry, iattr); 1061059c138bSAneesh Kumar K.V if (retval) 1062059c138bSAneesh Kumar K.V return retval; 1063059c138bSAneesh Kumar K.V 106442869c8aSAneesh Kumar K.V v9ses = v9fs_dentry2v9ses(dentry); 106566246641SJianyong Wu if (iattr->ia_valid & ATTR_FILE) { 106666246641SJianyong Wu fid = iattr->ia_file->private_data; 106766246641SJianyong Wu WARN_ON(!fid); 106866246641SJianyong Wu } 10696636b6dcSJianyong Wu if (!fid) { 1070bd238fb4SLatchesar Ionkov fid = v9fs_fid_lookup(dentry); 10716636b6dcSJianyong Wu use_dentry = 1; 10726636b6dcSJianyong Wu } 1073da977b2cSEric Van Hensbergen if (IS_ERR(fid)) 1074da977b2cSEric Van Hensbergen return PTR_ERR(fid); 10752bad8471SEric Van Hensbergen 1076531b1094SLatchesar Ionkov v9fs_blank_wstat(&wstat); 10772bad8471SEric Van Hensbergen if (iattr->ia_valid & ATTR_MODE) 1078531b1094SLatchesar Ionkov wstat.mode = unixmode2p9mode(v9ses, iattr->ia_mode); 10792bad8471SEric Van Hensbergen 10802bad8471SEric Van Hensbergen if (iattr->ia_valid & ATTR_MTIME) 1081531b1094SLatchesar Ionkov wstat.mtime = iattr->ia_mtime.tv_sec; 10822bad8471SEric Van Hensbergen 10832bad8471SEric Van Hensbergen if (iattr->ia_valid & ATTR_ATIME) 1084531b1094SLatchesar Ionkov wstat.atime = iattr->ia_atime.tv_sec; 10852bad8471SEric Van Hensbergen 10862bad8471SEric Van Hensbergen if (iattr->ia_valid & ATTR_SIZE) 1087531b1094SLatchesar Ionkov wstat.length = iattr->ia_size; 10882bad8471SEric Van Hensbergen 1089dd6102fbSSripathi Kodi if (v9fs_proto_dotu(v9ses)) { 1090531b1094SLatchesar Ionkov if (iattr->ia_valid & ATTR_UID) 1091531b1094SLatchesar Ionkov wstat.n_uid = iattr->ia_uid; 10922bad8471SEric Van Hensbergen 1093531b1094SLatchesar Ionkov if (iattr->ia_valid & ATTR_GID) 1094531b1094SLatchesar Ionkov wstat.n_gid = iattr->ia_gid; 10952bad8471SEric Van Hensbergen } 1096059c138bSAneesh Kumar K.V 10973dc5436aSAneesh Kumar K.V /* Write all dirty data */ 1098d9bc0d11SEric Van Hensbergen if (d_is_reg(dentry)) { 1099d9bc0d11SEric Van Hensbergen retval = filemap_fdatawrite(inode->i_mapping); 1100d9bc0d11SEric Van Hensbergen if (retval) 1101d9bc0d11SEric Van Hensbergen p9_debug(P9_DEBUG_ERROR, 1102d9bc0d11SEric Van Hensbergen "flushing writeback during setattr returned %d\n", retval); 1103d9bc0d11SEric Van Hensbergen } 11043dc5436aSAneesh Kumar K.V 1105f10fc50fSAneesh Kumar K.V retval = p9_client_wstat(fid, &wstat); 11066636b6dcSJianyong Wu 11076636b6dcSJianyong Wu if (use_dentry) 1108b48dbb99SDominique Martinet p9_fid_put(fid); 11096636b6dcSJianyong Wu 1110f10fc50fSAneesh Kumar K.V if (retval < 0) 1111f10fc50fSAneesh Kumar K.V return retval; 1112059c138bSAneesh Kumar K.V 1113059c138bSAneesh Kumar K.V if ((iattr->ia_valid & ATTR_SIZE) && 111424e42e32SDavid Howells iattr->ia_size != i_size_read(inode)) { 111524e42e32SDavid Howells truncate_setsize(inode, iattr->ia_size); 11161543b4c5SEric Van Hensbergen truncate_pagecache(inode, iattr->ia_size); 11171543b4c5SEric Van Hensbergen 11184eb31178SEric Van Hensbergen #ifdef CONFIG_9P_FSCACHE 11194eb31178SEric Van Hensbergen if (v9ses->cache & CACHE_FSCACHE) { 11204eb31178SEric Van Hensbergen struct v9fs_inode *v9inode = V9FS_I(inode); 11214eb31178SEric Van Hensbergen 112224e42e32SDavid Howells fscache_resize_cookie(v9fs_inode_cookie(v9inode), iattr->ia_size); 112324e42e32SDavid Howells } 11244eb31178SEric Van Hensbergen #endif 11254eb31178SEric Van Hensbergen } 1126059c138bSAneesh Kumar K.V 112724e42e32SDavid Howells v9fs_invalidate_inode_attr(inode); 11281025774cSChristoph Hellwig 1129c1632a0fSChristian Brauner setattr_copy(&nop_mnt_idmap, inode, iattr); 113024e42e32SDavid Howells mark_inode_dirty(inode); 11311025774cSChristoph Hellwig return 0; 11322bad8471SEric Van Hensbergen } 11332bad8471SEric Van Hensbergen 11342bad8471SEric Van Hensbergen /** 1135531b1094SLatchesar Ionkov * v9fs_stat2inode - populate an inode structure with mistat info 1136531b1094SLatchesar Ionkov * @stat: Plan 9 metadata (mistat) structure 11372bad8471SEric Van Hensbergen * @inode: inode to populate 11382bad8471SEric Van Hensbergen * @sb: superblock of filesystem 11395e3cc1eeSHou Tao * @flags: control flags (e.g. V9FS_STAT2INODE_KEEP_ISIZE) 11402bad8471SEric Van Hensbergen * 11412bad8471SEric Van Hensbergen */ 11422bad8471SEric Van Hensbergen 11432bad8471SEric Van Hensbergen void 114451a87c55SEric Van Hensbergen v9fs_stat2inode(struct p9_wstat *stat, struct inode *inode, 11455e3cc1eeSHou Tao struct super_block *sb, unsigned int flags) 11462bad8471SEric Van Hensbergen { 11473eda0de6SAl Viro umode_t mode; 11482bad8471SEric Van Hensbergen struct v9fs_session_info *v9ses = sb->s_fs_info; 1149b3cbea03SAneesh Kumar K.V struct v9fs_inode *v9inode = V9FS_I(inode); 11502bad8471SEric Van Hensbergen 1151bfe86848SMiklos Szeredi set_nlink(inode, 1); 11522bad8471SEric Van Hensbergen 1153531b1094SLatchesar Ionkov inode->i_atime.tv_sec = stat->atime; 1154531b1094SLatchesar Ionkov inode->i_mtime.tv_sec = stat->mtime; 11554f871800SJeff Layton inode_set_ctime(inode, stat->mtime, 0); 11562bad8471SEric Van Hensbergen 1157bd32b82dSLatchesar Ionkov inode->i_uid = v9ses->dfltuid; 1158bd32b82dSLatchesar Ionkov inode->i_gid = v9ses->dfltgid; 11592bad8471SEric Van Hensbergen 1160dd6102fbSSripathi Kodi if (v9fs_proto_dotu(v9ses)) { 1161531b1094SLatchesar Ionkov inode->i_uid = stat->n_uid; 1162531b1094SLatchesar Ionkov inode->i_gid = stat->n_gid; 1163531b1094SLatchesar Ionkov } 11645717144aSAneesh Kumar K.V if ((S_ISREG(inode->i_mode)) || (S_ISDIR(inode->i_mode))) { 11659652c732SAl Viro if (v9fs_proto_dotu(v9ses)) { 11669652c732SAl Viro unsigned int i_nlink; 11675717144aSAneesh Kumar K.V /* 11689652c732SAl Viro * Hadlink support got added later to the .u extension. 11699652c732SAl Viro * So there can be a server out there that doesn't 11709652c732SAl Viro * support this even with .u extension. That would 11719652c732SAl Viro * just leave us with stat->extension being an empty 11729652c732SAl Viro * string, though. 11735717144aSAneesh Kumar K.V */ 11745717144aSAneesh Kumar K.V /* HARDLINKCOUNT %u */ 11759652c732SAl Viro if (sscanf(stat->extension, 11769652c732SAl Viro " HARDLINKCOUNT %u", &i_nlink) == 1) 1177bfe86848SMiklos Szeredi set_nlink(inode, i_nlink); 11785717144aSAneesh Kumar K.V } 11795717144aSAneesh Kumar K.V } 1180df345c67SAneesh Kumar K.V mode = p9mode2perm(v9ses, stat); 118145089142SAneesh Kumar K.V mode |= inode->i_mode & ~S_IALLUGO; 118245089142SAneesh Kumar K.V inode->i_mode = mode; 11832bad8471SEric Van Hensbergen 11845e3cc1eeSHou Tao if (!(flags & V9FS_STAT2INODE_KEEP_ISIZE)) 11855e3cc1eeSHou Tao v9fs_i_size_write(inode, stat->length); 1186bd238fb4SLatchesar Ionkov /* not real number of blocks, but 512 byte ones ... */ 11875e3cc1eeSHou Tao inode->i_blocks = (stat->length + 512 - 1) >> 9; 1188b3cbea03SAneesh Kumar K.V v9inode->cache_validity &= ~V9FS_INO_INVALID_ATTR; 11892bad8471SEric Van Hensbergen } 11902bad8471SEric Van Hensbergen 11912bad8471SEric Van Hensbergen /** 11922bad8471SEric Van Hensbergen * v9fs_qid2ino - convert qid into inode number 11932bad8471SEric Van Hensbergen * @qid: qid to hash 11942bad8471SEric Van Hensbergen * 11952bad8471SEric Van Hensbergen * BUG: potential for inode number collisions? 11962bad8471SEric Van Hensbergen */ 11972bad8471SEric Van Hensbergen 1198bd238fb4SLatchesar Ionkov ino_t v9fs_qid2ino(struct p9_qid *qid) 11992bad8471SEric Van Hensbergen { 12002bad8471SEric Van Hensbergen u64 path = qid->path + 2; 12012bad8471SEric Van Hensbergen ino_t i = 0; 12022bad8471SEric Van Hensbergen 12032bad8471SEric Van Hensbergen if (sizeof(ino_t) == sizeof(path)) 12042bad8471SEric Van Hensbergen memcpy(&i, &path, sizeof(ino_t)); 12052bad8471SEric Van Hensbergen else 12062bad8471SEric Van Hensbergen i = (ino_t) (path ^ (path >> 32)); 12072bad8471SEric Van Hensbergen 12082bad8471SEric Van Hensbergen return i; 12092bad8471SEric Van Hensbergen } 12102bad8471SEric Van Hensbergen 12112bad8471SEric Van Hensbergen /** 12126b255391SAl Viro * v9fs_vfs_get_link - follow a symlink path 12132bad8471SEric Van Hensbergen * @dentry: dentry for symlink 12146b255391SAl Viro * @inode: inode for symlink 1215fceef393SAl Viro * @done: delayed call for when we are done with the return value 12162bad8471SEric Van Hensbergen */ 12172bad8471SEric Van Hensbergen 12186b255391SAl Viro static const char *v9fs_vfs_get_link(struct dentry *dentry, 1219fceef393SAl Viro struct inode *inode, 1220fceef393SAl Viro struct delayed_call *done) 12212bad8471SEric Van Hensbergen { 12226b255391SAl Viro struct v9fs_session_info *v9ses; 12236b255391SAl Viro struct p9_fid *fid; 122490e4fc88SAl Viro struct p9_wstat *st; 1225680baacbSAl Viro char *res; 12262bad8471SEric Van Hensbergen 12276b255391SAl Viro if (!dentry) 12286b255391SAl Viro return ERR_PTR(-ECHILD); 12296b255391SAl Viro 12306b255391SAl Viro v9ses = v9fs_dentry2v9ses(dentry); 1231e5690f26SDominique Martinet if (!v9fs_proto_dotu(v9ses)) 1232e5690f26SDominique Martinet return ERR_PTR(-EBADF); 1233e5690f26SDominique Martinet 12344b8e9923SAl Viro p9_debug(P9_DEBUG_VFS, "%pd\n", dentry); 1235e5690f26SDominique Martinet fid = v9fs_fid_lookup(dentry); 12362bad8471SEric Van Hensbergen 123790e4fc88SAl Viro if (IS_ERR(fid)) 123890e4fc88SAl Viro return ERR_CAST(fid); 12392bad8471SEric Van Hensbergen 124090e4fc88SAl Viro st = p9_client_stat(fid); 1241b48dbb99SDominique Martinet p9_fid_put(fid); 124290e4fc88SAl Viro if (IS_ERR(st)) 124390e4fc88SAl Viro return ERR_CAST(st); 124490e4fc88SAl Viro 124590e4fc88SAl Viro if (!(st->mode & P9_DMSYMLINK)) { 124690e4fc88SAl Viro p9stat_free(st); 124790e4fc88SAl Viro kfree(st); 124890e4fc88SAl Viro return ERR_PTR(-EINVAL); 12492bad8471SEric Van Hensbergen } 1250680baacbSAl Viro res = st->extension; 125190e4fc88SAl Viro st->extension = NULL; 1252680baacbSAl Viro if (strlen(res) >= PATH_MAX) 1253680baacbSAl Viro res[PATH_MAX - 1] = '\0'; 1254680baacbSAl Viro 125590e4fc88SAl Viro p9stat_free(st); 125690e4fc88SAl Viro kfree(st); 1257fceef393SAl Viro set_delayed_call(done, kfree_link, res); 1258fceef393SAl Viro return res; 12592bad8471SEric Van Hensbergen } 12602bad8471SEric Van Hensbergen 12612bad8471SEric Van Hensbergen /** 1262ee443996SEric Van Hensbergen * v9fs_vfs_mkspecial - create a special file 1263ee443996SEric Van Hensbergen * @dir: inode to create special file in 1264ee443996SEric Van Hensbergen * @dentry: dentry to create 1265fd2916bdSFabian Frederick * @perm: mode to create special file 1266ee443996SEric Van Hensbergen * @extension: 9p2000.u format extension string representing special file 1267ee443996SEric Van Hensbergen * 1268ee443996SEric Van Hensbergen */ 1269ee443996SEric Van Hensbergen 1270531b1094SLatchesar Ionkov static int v9fs_vfs_mkspecial(struct inode *dir, struct dentry *dentry, 1271c2837de7SAl Viro u32 perm, const char *extension) 1272531b1094SLatchesar Ionkov { 1273bd238fb4SLatchesar Ionkov struct p9_fid *fid; 1274d28c61f0SAneesh Kumar K.V struct v9fs_session_info *v9ses; 1275531b1094SLatchesar Ionkov 12766a3124a3SLatchesar Ionkov v9ses = v9fs_inode2v9ses(dir); 1277dd6102fbSSripathi Kodi if (!v9fs_proto_dotu(v9ses)) { 12785d385153SJoe Perches p9_debug(P9_DEBUG_ERROR, "not extended\n"); 12796a3124a3SLatchesar Ionkov return -EPERM; 1280531b1094SLatchesar Ionkov } 1281531b1094SLatchesar Ionkov 1282bd238fb4SLatchesar Ionkov fid = v9fs_create(v9ses, dir, dentry, (char *) extension, perm, 1283bd238fb4SLatchesar Ionkov P9_OREAD); 1284bd238fb4SLatchesar Ionkov if (IS_ERR(fid)) 1285bd238fb4SLatchesar Ionkov return PTR_ERR(fid); 1286da977b2cSEric Van Hensbergen 1287d28c61f0SAneesh Kumar K.V v9fs_invalidate_inode_attr(dir); 1288b48dbb99SDominique Martinet p9_fid_put(fid); 12896a3124a3SLatchesar Ionkov return 0; 1290531b1094SLatchesar Ionkov } 1291531b1094SLatchesar Ionkov 1292531b1094SLatchesar Ionkov /** 1293531b1094SLatchesar Ionkov * v9fs_vfs_symlink - helper function to create symlinks 12947a77db95SChristian Brauner * @idmap: idmap of the mount 1295531b1094SLatchesar Ionkov * @dir: directory inode containing symlink 1296531b1094SLatchesar Ionkov * @dentry: dentry for symlink 1297531b1094SLatchesar Ionkov * @symname: symlink data 1298531b1094SLatchesar Ionkov * 1299ee443996SEric Van Hensbergen * See Also: 9P2000.u RFC for more information 1300531b1094SLatchesar Ionkov * 1301531b1094SLatchesar Ionkov */ 1302531b1094SLatchesar Ionkov 1303531b1094SLatchesar Ionkov static int 13047a77db95SChristian Brauner v9fs_vfs_symlink(struct mnt_idmap *idmap, struct inode *dir, 1305549c7297SChristian Brauner struct dentry *dentry, const char *symname) 1306531b1094SLatchesar Ionkov { 13074b8e9923SAl Viro p9_debug(P9_DEBUG_VFS, " %lu,%pd,%s\n", 13084b8e9923SAl Viro dir->i_ino, dentry, symname); 1309531b1094SLatchesar Ionkov 1310c2837de7SAl Viro return v9fs_vfs_mkspecial(dir, dentry, P9_DMSYMLINK, symname); 1311531b1094SLatchesar Ionkov } 1312531b1094SLatchesar Ionkov 1313b46c267eSAl Viro #define U32_MAX_DIGITS 10 1314b46c267eSAl Viro 13152bad8471SEric Van Hensbergen /** 13162bad8471SEric Van Hensbergen * v9fs_vfs_link - create a hardlink 13172bad8471SEric Van Hensbergen * @old_dentry: dentry for file to link to 13182bad8471SEric Van Hensbergen * @dir: inode destination for new link 131973c592b9SEric Van Hensbergen * @dentry: dentry for link 13202bad8471SEric Van Hensbergen * 13212bad8471SEric Van Hensbergen */ 13222bad8471SEric Van Hensbergen 13232bad8471SEric Van Hensbergen static int 13242bad8471SEric Van Hensbergen v9fs_vfs_link(struct dentry *old_dentry, struct inode *dir, 13252bad8471SEric Van Hensbergen struct dentry *dentry) 13262bad8471SEric Van Hensbergen { 1327531b1094SLatchesar Ionkov int retval; 1328b46c267eSAl Viro char name[1 + U32_MAX_DIGITS + 2]; /* sign + number + \n + \0 */ 1329d28c61f0SAneesh Kumar K.V struct p9_fid *oldfid; 13302bad8471SEric Van Hensbergen 13314b8e9923SAl Viro p9_debug(P9_DEBUG_VFS, " %lu,%pd,%pd\n", 13324b8e9923SAl Viro dir->i_ino, dentry, old_dentry); 13332bad8471SEric Van Hensbergen 1334da977b2cSEric Van Hensbergen oldfid = v9fs_fid_clone(old_dentry); 1335da977b2cSEric Van Hensbergen if (IS_ERR(oldfid)) 1336da977b2cSEric Van Hensbergen return PTR_ERR(oldfid); 13372bad8471SEric Van Hensbergen 133816cce6d2SLatchesar Ionkov sprintf(name, "%d\n", oldfid->fid); 1339bd238fb4SLatchesar Ionkov retval = v9fs_vfs_mkspecial(dir, dentry, P9_DMLINK, name); 1340c06c066aSAneesh Kumar K.V if (!retval) { 13412b0143b5SDavid Howells v9fs_refresh_inode(oldfid, d_inode(old_dentry)); 1342d28c61f0SAneesh Kumar K.V v9fs_invalidate_inode_attr(dir); 1343c06c066aSAneesh Kumar K.V } 1344b48dbb99SDominique Martinet p9_fid_put(oldfid); 13452bad8471SEric Van Hensbergen return retval; 13462bad8471SEric Van Hensbergen } 13472bad8471SEric Van Hensbergen 13482bad8471SEric Van Hensbergen /** 13492bad8471SEric Van Hensbergen * v9fs_vfs_mknod - create a special file 13505ebb29beSChristian Brauner * @idmap: idmap of the mount 13512bad8471SEric Van Hensbergen * @dir: inode destination for new link 13522bad8471SEric Van Hensbergen * @dentry: dentry for file 13532bad8471SEric Van Hensbergen * @mode: mode for creation 1354ee443996SEric Van Hensbergen * @rdev: device associated with special file 13552bad8471SEric Van Hensbergen * 13562bad8471SEric Van Hensbergen */ 13572bad8471SEric Van Hensbergen 13582bad8471SEric Van Hensbergen static int 13595ebb29beSChristian Brauner v9fs_vfs_mknod(struct mnt_idmap *idmap, struct inode *dir, 1360549c7297SChristian Brauner struct dentry *dentry, umode_t mode, dev_t rdev) 13612bad8471SEric Van Hensbergen { 1362c2837de7SAl Viro struct v9fs_session_info *v9ses = v9fs_inode2v9ses(dir); 1363531b1094SLatchesar Ionkov int retval; 1364b46c267eSAl Viro char name[2 + U32_MAX_DIGITS + 1 + U32_MAX_DIGITS + 1]; 1365c2837de7SAl Viro u32 perm; 13662bad8471SEric Van Hensbergen 13676e195b0fSDominique Martinet p9_debug(P9_DEBUG_VFS, " %lu,%pd mode: %x MAJOR: %u MINOR: %u\n", 13684b8e9923SAl Viro dir->i_ino, dentry, mode, 13695d385153SJoe Perches MAJOR(rdev), MINOR(rdev)); 13702bad8471SEric Van Hensbergen 13712bad8471SEric Van Hensbergen /* build extension */ 13722bad8471SEric Van Hensbergen if (S_ISBLK(mode)) 1373531b1094SLatchesar Ionkov sprintf(name, "b %u %u", MAJOR(rdev), MINOR(rdev)); 13742bad8471SEric Van Hensbergen else if (S_ISCHR(mode)) 1375531b1094SLatchesar Ionkov sprintf(name, "c %u %u", MAJOR(rdev), MINOR(rdev)); 1376b46c267eSAl Viro else 1377531b1094SLatchesar Ionkov *name = 0; 13782bad8471SEric Van Hensbergen 1379c2837de7SAl Viro perm = unixmode2p9mode(v9ses, mode); 1380c2837de7SAl Viro retval = v9fs_vfs_mkspecial(dir, dentry, perm, name); 13812bad8471SEric Van Hensbergen 13822bad8471SEric Van Hensbergen return retval; 13832bad8471SEric Van Hensbergen } 13842bad8471SEric Van Hensbergen 1385b3cbea03SAneesh Kumar K.V int v9fs_refresh_inode(struct p9_fid *fid, struct inode *inode) 1386b3cbea03SAneesh Kumar K.V { 138745089142SAneesh Kumar K.V int umode; 138845089142SAneesh Kumar K.V dev_t rdev; 1389b3cbea03SAneesh Kumar K.V struct p9_wstat *st; 1390b3cbea03SAneesh Kumar K.V struct v9fs_session_info *v9ses; 13915e3cc1eeSHou Tao unsigned int flags; 1392b3cbea03SAneesh Kumar K.V 1393b3cbea03SAneesh Kumar K.V v9ses = v9fs_inode2v9ses(inode); 1394b3cbea03SAneesh Kumar K.V st = p9_client_stat(fid); 1395b3cbea03SAneesh Kumar K.V if (IS_ERR(st)) 1396b3cbea03SAneesh Kumar K.V return PTR_ERR(st); 139745089142SAneesh Kumar K.V /* 139845089142SAneesh Kumar K.V * Don't update inode if the file type is different 139945089142SAneesh Kumar K.V */ 140045089142SAneesh Kumar K.V umode = p9mode2unixmode(v9ses, st, &rdev); 14016e3e2c43SAl Viro if (inode_wrong_type(inode, umode)) 140245089142SAneesh Kumar K.V goto out; 1403b3cbea03SAneesh Kumar K.V 1404b3cbea03SAneesh Kumar K.V /* 1405b3cbea03SAneesh Kumar K.V * We don't want to refresh inode->i_size, 1406b3cbea03SAneesh Kumar K.V * because we may have cached data 1407b3cbea03SAneesh Kumar K.V */ 14084eb31178SEric Van Hensbergen flags = (v9ses->cache & CACHE_LOOSE) ? 14095e3cc1eeSHou Tao V9FS_STAT2INODE_KEEP_ISIZE : 0; 14105e3cc1eeSHou Tao v9fs_stat2inode(st, inode, inode->i_sb, flags); 141145089142SAneesh Kumar K.V out: 1412b3cbea03SAneesh Kumar K.V p9stat_free(st); 1413b3cbea03SAneesh Kumar K.V kfree(st); 1414b3cbea03SAneesh Kumar K.V return 0; 1415b3cbea03SAneesh Kumar K.V } 1416b3cbea03SAneesh Kumar K.V 14179b6533c9SSripathi Kodi static const struct inode_operations v9fs_dir_inode_operations_dotu = { 14189b6533c9SSripathi Kodi .create = v9fs_vfs_create, 14199b6533c9SSripathi Kodi .lookup = v9fs_vfs_lookup, 1420e43ae79cSMiklos Szeredi .atomic_open = v9fs_vfs_atomic_open, 14219b6533c9SSripathi Kodi .symlink = v9fs_vfs_symlink, 142250cc42ffSVenkateswararao Jujjuri (JV) .link = v9fs_vfs_link, 14239b6533c9SSripathi Kodi .unlink = v9fs_vfs_unlink, 14249b6533c9SSripathi Kodi .mkdir = v9fs_vfs_mkdir, 14259b6533c9SSripathi Kodi .rmdir = v9fs_vfs_rmdir, 14261d76e313SAneesh Kumar K.V .mknod = v9fs_vfs_mknod, 14279b6533c9SSripathi Kodi .rename = v9fs_vfs_rename, 14289b6533c9SSripathi Kodi .getattr = v9fs_vfs_getattr, 14299b6533c9SSripathi Kodi .setattr = v9fs_vfs_setattr, 14309b6533c9SSripathi Kodi }; 14319b6533c9SSripathi Kodi 1432754661f1SArjan van de Ven static const struct inode_operations v9fs_dir_inode_operations = { 1433b501611aSEric Van Hensbergen .create = v9fs_vfs_create, 1434b501611aSEric Van Hensbergen .lookup = v9fs_vfs_lookup, 1435e43ae79cSMiklos Szeredi .atomic_open = v9fs_vfs_atomic_open, 1436b501611aSEric Van Hensbergen .unlink = v9fs_vfs_unlink, 1437b501611aSEric Van Hensbergen .mkdir = v9fs_vfs_mkdir, 1438b501611aSEric Van Hensbergen .rmdir = v9fs_vfs_rmdir, 1439b501611aSEric Van Hensbergen .mknod = v9fs_vfs_mknod, 1440b501611aSEric Van Hensbergen .rename = v9fs_vfs_rename, 1441b501611aSEric Van Hensbergen .getattr = v9fs_vfs_getattr, 1442b501611aSEric Van Hensbergen .setattr = v9fs_vfs_setattr, 1443b501611aSEric Van Hensbergen }; 1444b501611aSEric Van Hensbergen 1445754661f1SArjan van de Ven static const struct inode_operations v9fs_file_inode_operations = { 14462bad8471SEric Van Hensbergen .getattr = v9fs_vfs_getattr, 14472bad8471SEric Van Hensbergen .setattr = v9fs_vfs_setattr, 14482bad8471SEric Van Hensbergen }; 14492bad8471SEric Van Hensbergen 1450754661f1SArjan van de Ven static const struct inode_operations v9fs_symlink_inode_operations = { 14516b255391SAl Viro .get_link = v9fs_vfs_get_link, 14522bad8471SEric Van Hensbergen .getattr = v9fs_vfs_getattr, 14532bad8471SEric Van Hensbergen .setattr = v9fs_vfs_setattr, 14542bad8471SEric Van Hensbergen }; 14559b6533c9SSripathi Kodi 1456