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 ret = 0; 1676a3124a3SLatchesar Ionkov switch (uflags&3) { 1686a3124a3SLatchesar Ionkov default: 1696a3124a3SLatchesar Ionkov case O_RDONLY: 170bd238fb4SLatchesar Ionkov ret = P9_OREAD; 1716a3124a3SLatchesar Ionkov break; 1726a3124a3SLatchesar Ionkov 1736a3124a3SLatchesar Ionkov case O_WRONLY: 174bd238fb4SLatchesar Ionkov ret = P9_OWRITE; 1756a3124a3SLatchesar Ionkov break; 1766a3124a3SLatchesar Ionkov 1776a3124a3SLatchesar Ionkov case O_RDWR: 178bd238fb4SLatchesar Ionkov ret = P9_ORDWR; 1796a3124a3SLatchesar Ionkov break; 1806a3124a3SLatchesar Ionkov } 1816a3124a3SLatchesar Ionkov 1822e4bef41SEric Van Hensbergen if (extended) { 1832e4bef41SEric Van Hensbergen if (uflags & O_EXCL) 1842e4bef41SEric Van Hensbergen ret |= P9_OEXCL; 1852e4bef41SEric Van Hensbergen 1866a3124a3SLatchesar Ionkov if (uflags & O_APPEND) 187bd238fb4SLatchesar Ionkov ret |= P9_OAPPEND; 1882e4bef41SEric Van Hensbergen } 1896a3124a3SLatchesar Ionkov 1906a3124a3SLatchesar Ionkov return ret; 1916a3124a3SLatchesar Ionkov } 1926a3124a3SLatchesar Ionkov 1932bad8471SEric Van Hensbergen /** 194531b1094SLatchesar Ionkov * v9fs_blank_wstat - helper function to setup a 9P stat structure 195531b1094SLatchesar Ionkov * @wstat: structure to initialize 1962bad8471SEric Van Hensbergen * 1972bad8471SEric Van Hensbergen */ 1982bad8471SEric Van Hensbergen 1997a4439c4SM. Mohan Kumar void 200bd238fb4SLatchesar Ionkov v9fs_blank_wstat(struct p9_wstat *wstat) 2012bad8471SEric Van Hensbergen { 202531b1094SLatchesar Ionkov wstat->type = ~0; 203531b1094SLatchesar Ionkov wstat->dev = ~0; 204531b1094SLatchesar Ionkov wstat->qid.type = ~0; 205531b1094SLatchesar Ionkov wstat->qid.version = ~0; 206531b1094SLatchesar Ionkov *((long long *)&wstat->qid.path) = ~0; 207531b1094SLatchesar Ionkov wstat->mode = ~0; 208531b1094SLatchesar Ionkov wstat->atime = ~0; 209531b1094SLatchesar Ionkov wstat->mtime = ~0; 210531b1094SLatchesar Ionkov wstat->length = ~0; 211531b1094SLatchesar Ionkov wstat->name = NULL; 212531b1094SLatchesar Ionkov wstat->uid = NULL; 213531b1094SLatchesar Ionkov wstat->gid = NULL; 214531b1094SLatchesar Ionkov wstat->muid = NULL; 215447c5094SEric W. Biederman wstat->n_uid = INVALID_UID; 216447c5094SEric W. Biederman wstat->n_gid = INVALID_GID; 217447c5094SEric W. Biederman wstat->n_muid = INVALID_UID; 218531b1094SLatchesar Ionkov wstat->extension = NULL; 2192bad8471SEric Van Hensbergen } 2202bad8471SEric Van Hensbergen 22160e78d2cSAbhishek Kulkarni /** 22260e78d2cSAbhishek Kulkarni * v9fs_alloc_inode - helper function to allocate an inode 223bc868036SDavid Howells * @sb: The superblock to allocate the inode from 22460e78d2cSAbhishek Kulkarni */ 22560e78d2cSAbhishek Kulkarni struct inode *v9fs_alloc_inode(struct super_block *sb) 22660e78d2cSAbhishek Kulkarni { 227a78ce05dSAneesh Kumar K.V struct v9fs_inode *v9inode; 2286e195b0fSDominique Martinet 229fd60b288SMuchun Song v9inode = alloc_inode_sb(sb, v9fs_inode_cache, GFP_KERNEL); 230a78ce05dSAneesh Kumar K.V if (!v9inode) 23160e78d2cSAbhishek Kulkarni return NULL; 232b3cbea03SAneesh Kumar K.V v9inode->cache_validity = 0; 2335a7e0a8cSAneesh Kumar K.V mutex_init(&v9inode->v_mutex); 234874c8ca1SDavid Howells return &v9inode->netfs.inode; 23560e78d2cSAbhishek Kulkarni } 23660e78d2cSAbhishek Kulkarni 23760e78d2cSAbhishek Kulkarni /** 2385e8a0770SAl Viro * v9fs_free_inode - destroy an inode 239bc868036SDavid Howells * @inode: The inode to be freed 24060e78d2cSAbhishek Kulkarni */ 24160e78d2cSAbhishek Kulkarni 2425e8a0770SAl Viro void v9fs_free_inode(struct inode *inode) 243fa0d7e3dSNick Piggin { 244a78ce05dSAneesh Kumar K.V kmem_cache_free(v9fs_inode_cache, V9FS_I(inode)); 245fa0d7e3dSNick Piggin } 246fa0d7e3dSNick Piggin 247bc899ee1SDavid Howells /* 248bc899ee1SDavid Howells * Set parameters for the netfs library 249bc899ee1SDavid Howells */ 250bc899ee1SDavid Howells static void v9fs_set_netfs_context(struct inode *inode) 251bc899ee1SDavid Howells { 252e81fb419SLinus Torvalds struct v9fs_inode *v9inode = V9FS_I(inode); 253e81fb419SLinus Torvalds netfs_inode_init(&v9inode->netfs, &v9fs_req_ops); 254bc899ee1SDavid Howells } 255bc899ee1SDavid Howells 2565ffc0cb3SAneesh Kumar K.V int v9fs_init_inode(struct v9fs_session_info *v9ses, 2573eda0de6SAl Viro struct inode *inode, umode_t mode, dev_t rdev) 2582bad8471SEric Van Hensbergen { 2595ffc0cb3SAneesh Kumar K.V int err = 0; 2602bb54115SAbhishek Kulkarni 261f2d40141SChristian Brauner inode_init_owner(&nop_mnt_idmap, inode, NULL, mode); 2622bad8471SEric Van Hensbergen inode->i_blocks = 0; 26345089142SAneesh Kumar K.V inode->i_rdev = rdev; 2644f871800SJeff Layton inode->i_atime = inode->i_mtime = inode_set_ctime_current(inode); 265147b31cfSEric Van Hensbergen inode->i_mapping->a_ops = &v9fs_addr_operations; 266987a6485SGreg Kurz inode->i_private = NULL; 2672bad8471SEric Van Hensbergen 2682bad8471SEric Van Hensbergen switch (mode & S_IFMT) { 2692bad8471SEric Van Hensbergen case S_IFIFO: 2702bad8471SEric Van Hensbergen case S_IFBLK: 2712bad8471SEric Van Hensbergen case S_IFCHR: 2722bad8471SEric Van Hensbergen case S_IFSOCK: 2734b43516aSM. Mohan Kumar if (v9fs_proto_dotl(v9ses)) { 2744b43516aSM. Mohan Kumar inode->i_op = &v9fs_file_inode_operations_dotl; 2754b43516aSM. Mohan Kumar } else if (v9fs_proto_dotu(v9ses)) { 2764b43516aSM. Mohan Kumar inode->i_op = &v9fs_file_inode_operations; 2774b43516aSM. Mohan Kumar } else { 2785d385153SJoe Perches p9_debug(P9_DEBUG_ERROR, 279bd238fb4SLatchesar Ionkov "special files without extended mode\n"); 2802bb54115SAbhishek Kulkarni err = -EINVAL; 2812bb54115SAbhishek Kulkarni goto error; 282b501611aSEric Van Hensbergen } 2832bb54115SAbhishek Kulkarni init_special_inode(inode, inode->i_mode, inode->i_rdev); 2845d58bec5SEric Van Hensbergen break; 2852bad8471SEric Van Hensbergen case S_IFREG: 2869b6533c9SSripathi Kodi if (v9fs_proto_dotl(v9ses)) { 2879b6533c9SSripathi Kodi inode->i_op = &v9fs_file_inode_operations_dotl; 2889b6533c9SSripathi Kodi inode->i_fop = &v9fs_file_operations_dotl; 2899b6533c9SSripathi Kodi } else { 2902bad8471SEric Van Hensbergen inode->i_op = &v9fs_file_inode_operations; 2912bad8471SEric Van Hensbergen inode->i_fop = &v9fs_file_operations; 2929b6533c9SSripathi Kodi } 2939b6533c9SSripathi Kodi 2942bad8471SEric Van Hensbergen break; 295b501611aSEric Van Hensbergen case S_IFLNK: 2969b6533c9SSripathi Kodi if (!v9fs_proto_dotu(v9ses) && !v9fs_proto_dotl(v9ses)) { 2975d385153SJoe Perches p9_debug(P9_DEBUG_ERROR, 2985d385153SJoe Perches "extended modes used with legacy protocol\n"); 2992bb54115SAbhishek Kulkarni err = -EINVAL; 3002bb54115SAbhishek Kulkarni goto error; 301b501611aSEric Van Hensbergen } 3029b6533c9SSripathi Kodi 3039b6533c9SSripathi Kodi if (v9fs_proto_dotl(v9ses)) 3049b6533c9SSripathi Kodi inode->i_op = &v9fs_symlink_inode_operations_dotl; 3059b6533c9SSripathi Kodi else 306b501611aSEric Van Hensbergen inode->i_op = &v9fs_symlink_inode_operations; 3079b6533c9SSripathi Kodi 308b501611aSEric Van Hensbergen break; 3092bad8471SEric Van Hensbergen case S_IFDIR: 310d8c76e6fSDave Hansen inc_nlink(inode); 3119b6533c9SSripathi Kodi if (v9fs_proto_dotl(v9ses)) 3129b6533c9SSripathi Kodi inode->i_op = &v9fs_dir_inode_operations_dotl; 3139b6533c9SSripathi Kodi else if (v9fs_proto_dotu(v9ses)) 3149b6533c9SSripathi Kodi inode->i_op = &v9fs_dir_inode_operations_dotu; 315b501611aSEric Van Hensbergen else 3162bad8471SEric Van Hensbergen inode->i_op = &v9fs_dir_inode_operations; 3179b6533c9SSripathi Kodi 3189b6533c9SSripathi Kodi if (v9fs_proto_dotl(v9ses)) 3199b6533c9SSripathi Kodi inode->i_fop = &v9fs_dir_operations_dotl; 3209b6533c9SSripathi Kodi else 3212bad8471SEric Van Hensbergen inode->i_fop = &v9fs_dir_operations; 3229b6533c9SSripathi Kodi 3232bad8471SEric Van Hensbergen break; 3242bad8471SEric Van Hensbergen default: 325609eac1cSLinus Torvalds p9_debug(P9_DEBUG_ERROR, "BAD mode 0x%hx S_IFMT 0x%x\n", 3262bad8471SEric Van Hensbergen mode, mode & S_IFMT); 3272bb54115SAbhishek Kulkarni err = -EINVAL; 3282bb54115SAbhishek Kulkarni goto error; 3292bad8471SEric Van Hensbergen } 330bc899ee1SDavid Howells 331bc899ee1SDavid Howells v9fs_set_netfs_context(inode); 3322bb54115SAbhishek Kulkarni error: 3335ffc0cb3SAneesh Kumar K.V return err; 3345ffc0cb3SAneesh Kumar K.V 3355ffc0cb3SAneesh Kumar K.V } 3365ffc0cb3SAneesh Kumar K.V 3375ffc0cb3SAneesh Kumar K.V /** 3385ffc0cb3SAneesh Kumar K.V * v9fs_get_inode - helper function to setup an inode 3395ffc0cb3SAneesh Kumar K.V * @sb: superblock 3405ffc0cb3SAneesh Kumar K.V * @mode: mode to setup inode with 341bc868036SDavid Howells * @rdev: The device numbers to set 3425ffc0cb3SAneesh Kumar K.V */ 3435ffc0cb3SAneesh Kumar K.V 3443eda0de6SAl Viro struct inode *v9fs_get_inode(struct super_block *sb, umode_t mode, dev_t rdev) 3455ffc0cb3SAneesh Kumar K.V { 3465ffc0cb3SAneesh Kumar K.V int err; 3475ffc0cb3SAneesh Kumar K.V struct inode *inode; 3485ffc0cb3SAneesh Kumar K.V struct v9fs_session_info *v9ses = sb->s_fs_info; 3495ffc0cb3SAneesh Kumar K.V 350609eac1cSLinus Torvalds p9_debug(P9_DEBUG_VFS, "super block: %p mode: %ho\n", sb, mode); 3515ffc0cb3SAneesh Kumar K.V 3525ffc0cb3SAneesh Kumar K.V inode = new_inode(sb); 3535ffc0cb3SAneesh Kumar K.V if (!inode) { 3545d385153SJoe Perches pr_warn("%s (%d): Problem allocating inode\n", 3555d385153SJoe Perches __func__, task_pid_nr(current)); 3565ffc0cb3SAneesh Kumar K.V return ERR_PTR(-ENOMEM); 3575ffc0cb3SAneesh Kumar K.V } 35845089142SAneesh Kumar K.V err = v9fs_init_inode(v9ses, inode, mode, rdev); 3595ffc0cb3SAneesh Kumar K.V if (err) { 3602bb54115SAbhishek Kulkarni iput(inode); 3612bb54115SAbhishek Kulkarni return ERR_PTR(err); 3622bad8471SEric Van Hensbergen } 3635ffc0cb3SAneesh Kumar K.V return inode; 3645ffc0cb3SAneesh Kumar K.V } 3652bad8471SEric Van Hensbergen 36660e78d2cSAbhishek Kulkarni /** 367bc868036SDavid Howells * v9fs_evict_inode - Remove an inode from the inode cache 36860e78d2cSAbhishek Kulkarni * @inode: inode to release 36960e78d2cSAbhishek Kulkarni * 37060e78d2cSAbhishek Kulkarni */ 371b57922d9SAl Viro void v9fs_evict_inode(struct inode *inode) 37260e78d2cSAbhishek Kulkarni { 3734eb31178SEric Van Hensbergen struct v9fs_inode __maybe_unused *v9inode = V9FS_I(inode); 3744eb31178SEric Van Hensbergen __le32 __maybe_unused version; 3756b39f6d2SAneesh Kumar K.V 3764ad78628SAl Viro truncate_inode_pages_final(&inode->i_data); 3774eb31178SEric Van Hensbergen 3784eb31178SEric Van Hensbergen #ifdef CONFIG_9P_FSCACHE 37993c84614SDavid Howells version = cpu_to_le32(v9inode->qid.version); 38093c84614SDavid Howells fscache_clear_inode_writeback(v9fs_inode_cookie(v9inode), inode, 38193c84614SDavid Howells &version); 3824eb31178SEric Van Hensbergen #endif 3834eb31178SEric Van Hensbergen 384dbd5768fSJan Kara clear_inode(inode); 3854ad78628SAl Viro filemap_fdatawrite(&inode->i_data); 38660e78d2cSAbhishek Kulkarni 3874eb31178SEric Van Hensbergen #ifdef CONFIG_9P_FSCACHE 38824e42e32SDavid Howells fscache_relinquish_cookie(v9fs_inode_cookie(v9inode), false); 3894eb31178SEric Van Hensbergen #endif 3903cf387d7SAneesh Kumar K.V } 39160e78d2cSAbhishek Kulkarni 392fd2421f5SAneesh Kumar K.V static int v9fs_test_inode(struct inode *inode, void *data) 393fd2421f5SAneesh Kumar K.V { 394fd2421f5SAneesh Kumar K.V int umode; 39545089142SAneesh Kumar K.V dev_t rdev; 396fd2421f5SAneesh Kumar K.V struct v9fs_inode *v9inode = V9FS_I(inode); 397fd2421f5SAneesh Kumar K.V struct p9_wstat *st = (struct p9_wstat *)data; 398fd2421f5SAneesh Kumar K.V struct v9fs_session_info *v9ses = v9fs_inode2v9ses(inode); 399fd2421f5SAneesh Kumar K.V 40045089142SAneesh Kumar K.V umode = p9mode2unixmode(v9ses, st, &rdev); 401fd2421f5SAneesh Kumar K.V /* don't match inode of different type */ 4026e3e2c43SAl Viro if (inode_wrong_type(inode, umode)) 403fd2421f5SAneesh Kumar K.V return 0; 404fd2421f5SAneesh Kumar K.V 405fd2421f5SAneesh Kumar K.V /* compare qid details */ 406fd2421f5SAneesh Kumar K.V if (memcmp(&v9inode->qid.version, 407fd2421f5SAneesh Kumar K.V &st->qid.version, sizeof(v9inode->qid.version))) 408fd2421f5SAneesh Kumar K.V return 0; 409fd2421f5SAneesh Kumar K.V 410fd2421f5SAneesh Kumar K.V if (v9inode->qid.type != st->qid.type) 411fd2421f5SAneesh Kumar K.V return 0; 4128ee03163STuomas Tynkkynen 4138ee03163STuomas Tynkkynen if (v9inode->qid.path != st->qid.path) 4148ee03163STuomas Tynkkynen return 0; 415fd2421f5SAneesh Kumar K.V return 1; 416fd2421f5SAneesh Kumar K.V } 417fd2421f5SAneesh Kumar K.V 418ed80fcfaSAneesh Kumar K.V static int v9fs_test_new_inode(struct inode *inode, void *data) 419ed80fcfaSAneesh Kumar K.V { 420ed80fcfaSAneesh Kumar K.V return 0; 421ed80fcfaSAneesh Kumar K.V } 422ed80fcfaSAneesh Kumar K.V 423fd2421f5SAneesh Kumar K.V static int v9fs_set_inode(struct inode *inode, void *data) 424fd2421f5SAneesh Kumar K.V { 425fd2421f5SAneesh Kumar K.V struct v9fs_inode *v9inode = V9FS_I(inode); 426fd2421f5SAneesh Kumar K.V struct p9_wstat *st = (struct p9_wstat *)data; 427fd2421f5SAneesh Kumar K.V 428fd2421f5SAneesh Kumar K.V memcpy(&v9inode->qid, &st->qid, sizeof(st->qid)); 429fd2421f5SAneesh Kumar K.V return 0; 430fd2421f5SAneesh Kumar K.V } 431fd2421f5SAneesh Kumar K.V 4325ffc0cb3SAneesh Kumar K.V static struct inode *v9fs_qid_iget(struct super_block *sb, 4335ffc0cb3SAneesh Kumar K.V struct p9_qid *qid, 434ed80fcfaSAneesh Kumar K.V struct p9_wstat *st, 435ed80fcfaSAneesh Kumar K.V int new) 4365ffc0cb3SAneesh Kumar K.V { 43745089142SAneesh Kumar K.V dev_t rdev; 4383eda0de6SAl Viro int retval; 4393eda0de6SAl Viro umode_t umode; 4405ffc0cb3SAneesh Kumar K.V unsigned long i_ino; 4415ffc0cb3SAneesh Kumar K.V struct inode *inode; 4425ffc0cb3SAneesh Kumar K.V struct v9fs_session_info *v9ses = sb->s_fs_info; 4436e195b0fSDominique Martinet int (*test)(struct inode *inode, void *data); 444ed80fcfaSAneesh Kumar K.V 445ed80fcfaSAneesh Kumar K.V if (new) 446ed80fcfaSAneesh Kumar K.V test = v9fs_test_new_inode; 447ed80fcfaSAneesh Kumar K.V else 448ed80fcfaSAneesh Kumar K.V test = v9fs_test_inode; 4495ffc0cb3SAneesh Kumar K.V 4505ffc0cb3SAneesh Kumar K.V i_ino = v9fs_qid2ino(qid); 451ed80fcfaSAneesh Kumar K.V inode = iget5_locked(sb, i_ino, test, v9fs_set_inode, st); 4525ffc0cb3SAneesh Kumar K.V if (!inode) 4535ffc0cb3SAneesh Kumar K.V return ERR_PTR(-ENOMEM); 4545ffc0cb3SAneesh Kumar K.V if (!(inode->i_state & I_NEW)) 4555ffc0cb3SAneesh Kumar K.V return inode; 4565ffc0cb3SAneesh Kumar K.V /* 4575ffc0cb3SAneesh Kumar K.V * initialize the inode with the stat info 4585ffc0cb3SAneesh Kumar K.V * FIXME!! we may need support for stale inodes 4595ffc0cb3SAneesh Kumar K.V * later. 4605ffc0cb3SAneesh Kumar K.V */ 461fd2421f5SAneesh Kumar K.V inode->i_ino = i_ino; 46245089142SAneesh Kumar K.V umode = p9mode2unixmode(v9ses, st, &rdev); 46345089142SAneesh Kumar K.V retval = v9fs_init_inode(v9ses, inode, umode, rdev); 4645ffc0cb3SAneesh Kumar K.V if (retval) 4655ffc0cb3SAneesh Kumar K.V goto error; 4665ffc0cb3SAneesh Kumar K.V 4675e3cc1eeSHou Tao v9fs_stat2inode(st, inode, sb, 0); 4685ffc0cb3SAneesh Kumar K.V v9fs_cache_inode_get_cookie(inode); 4695ffc0cb3SAneesh Kumar K.V unlock_new_inode(inode); 4705ffc0cb3SAneesh Kumar K.V return inode; 4715ffc0cb3SAneesh Kumar K.V error: 4720a73d0a2SAl Viro iget_failed(inode); 4735ffc0cb3SAneesh Kumar K.V return ERR_PTR(retval); 4745ffc0cb3SAneesh Kumar K.V 4755ffc0cb3SAneesh Kumar K.V } 4765ffc0cb3SAneesh Kumar K.V 47753c06f4eSAneesh Kumar K.V struct inode * 478a78ce05dSAneesh Kumar K.V v9fs_inode_from_fid(struct v9fs_session_info *v9ses, struct p9_fid *fid, 479ed80fcfaSAneesh Kumar K.V struct super_block *sb, int new) 4806a3124a3SLatchesar Ionkov { 48151a87c55SEric Van Hensbergen struct p9_wstat *st; 4825ffc0cb3SAneesh Kumar K.V struct inode *inode = NULL; 4836a3124a3SLatchesar Ionkov 484bd238fb4SLatchesar Ionkov st = p9_client_stat(fid); 48502bc3567SAbhishek Kulkarni if (IS_ERR(st)) 48602bc3567SAbhishek Kulkarni return ERR_CAST(st); 4872bad8471SEric Van Hensbergen 488ed80fcfaSAneesh Kumar K.V inode = v9fs_qid_iget(sb, &st->qid, st, new); 48902bc3567SAbhishek Kulkarni p9stat_free(st); 490bd238fb4SLatchesar Ionkov kfree(st); 4915ffc0cb3SAneesh Kumar K.V return inode; 4922bad8471SEric Van Hensbergen } 4932bad8471SEric Van Hensbergen 4942bad8471SEric Van Hensbergen /** 495f88657ceSAneesh Kumar K.V * v9fs_at_to_dotl_flags- convert Linux specific AT flags to 496f88657ceSAneesh Kumar K.V * plan 9 AT flag. 497f88657ceSAneesh Kumar K.V * @flags: flags to convert 498f88657ceSAneesh Kumar K.V */ 499f88657ceSAneesh Kumar K.V static int v9fs_at_to_dotl_flags(int flags) 500f88657ceSAneesh Kumar K.V { 501f88657ceSAneesh Kumar K.V int rflags = 0; 5026e195b0fSDominique Martinet 503f88657ceSAneesh Kumar K.V if (flags & AT_REMOVEDIR) 504f88657ceSAneesh Kumar K.V rflags |= P9_DOTL_AT_REMOVEDIR; 5056e195b0fSDominique Martinet 506f88657ceSAneesh Kumar K.V return rflags; 507f88657ceSAneesh Kumar K.V } 508f88657ceSAneesh Kumar K.V 509f88657ceSAneesh Kumar K.V /** 510ac89b2efSEryu Guan * v9fs_dec_count - helper functon to drop i_nlink. 511ac89b2efSEryu Guan * 512ac89b2efSEryu Guan * If a directory had nlink <= 2 (including . and ..), then we should not drop 513ac89b2efSEryu Guan * the link count, which indicates the underlying exported fs doesn't maintain 514ac89b2efSEryu Guan * nlink accurately. e.g. 515ac89b2efSEryu Guan * - overlayfs sets nlink to 1 for merged dir 516ac89b2efSEryu Guan * - ext4 (with dir_nlink feature enabled) sets nlink to 1 if a dir has more 517ac89b2efSEryu Guan * than EXT4_LINK_MAX (65000) links. 518ac89b2efSEryu Guan * 519ac89b2efSEryu Guan * @inode: inode whose nlink is being dropped 520ac89b2efSEryu Guan */ 521ac89b2efSEryu Guan static void v9fs_dec_count(struct inode *inode) 522ac89b2efSEryu Guan { 523ac89b2efSEryu Guan if (!S_ISDIR(inode->i_mode) || inode->i_nlink > 2) 524ac89b2efSEryu Guan drop_nlink(inode); 525ac89b2efSEryu Guan } 526ac89b2efSEryu Guan 527ac89b2efSEryu Guan /** 5282bad8471SEric Van Hensbergen * v9fs_remove - helper function to remove files and directories 52973c592b9SEric Van Hensbergen * @dir: directory inode that is being deleted 53048e370ffSAneesh Kumar K.V * @dentry: dentry that is being deleted 531fd2916bdSFabian Frederick * @flags: removing a directory 5322bad8471SEric Van Hensbergen * 5332bad8471SEric Van Hensbergen */ 5342bad8471SEric Van Hensbergen 53548e370ffSAneesh Kumar K.V static int v9fs_remove(struct inode *dir, struct dentry *dentry, int flags) 5362bad8471SEric Van Hensbergen { 53748e370ffSAneesh Kumar K.V struct inode *inode; 53848e370ffSAneesh Kumar K.V int retval = -EOPNOTSUPP; 53948e370ffSAneesh Kumar K.V struct p9_fid *v9fid, *dfid; 54048e370ffSAneesh Kumar K.V struct v9fs_session_info *v9ses; 5412bad8471SEric Van Hensbergen 5425d385153SJoe Perches p9_debug(P9_DEBUG_VFS, "inode: %p dentry: %p rmdir: %x\n", 54348e370ffSAneesh Kumar K.V dir, dentry, flags); 5442bad8471SEric Van Hensbergen 54548e370ffSAneesh Kumar K.V v9ses = v9fs_inode2v9ses(dir); 5462b0143b5SDavid Howells inode = d_inode(dentry); 54777d5a6b7SAl Viro dfid = v9fs_parent_fid(dentry); 54848e370ffSAneesh Kumar K.V if (IS_ERR(dfid)) { 54948e370ffSAneesh Kumar K.V retval = PTR_ERR(dfid); 5505d385153SJoe Perches p9_debug(P9_DEBUG_VFS, "fid lookup failed %d\n", retval); 55148e370ffSAneesh Kumar K.V return retval; 55248e370ffSAneesh Kumar K.V } 55348e370ffSAneesh Kumar K.V if (v9fs_proto_dotl(v9ses)) 554f88657ceSAneesh Kumar K.V retval = p9_client_unlinkat(dfid, dentry->d_name.name, 555f88657ceSAneesh Kumar K.V v9fs_at_to_dotl_flags(flags)); 556b48dbb99SDominique Martinet p9_fid_put(dfid); 55748e370ffSAneesh Kumar K.V if (retval == -EOPNOTSUPP) { 55848e370ffSAneesh Kumar K.V /* Try the one based on path */ 55948e370ffSAneesh Kumar K.V v9fid = v9fs_fid_clone(dentry); 560da977b2cSEric Van Hensbergen if (IS_ERR(v9fid)) 561da977b2cSEric Van Hensbergen return PTR_ERR(v9fid); 562d994f405SAneesh Kumar K.V retval = p9_client_remove(v9fid); 56348e370ffSAneesh Kumar K.V } 564b271ec47SAneesh Kumar K.V if (!retval) { 565b271ec47SAneesh Kumar K.V /* 566b271ec47SAneesh Kumar K.V * directories on unlink should have zero 567b271ec47SAneesh Kumar K.V * link count 568b271ec47SAneesh Kumar K.V */ 56948e370ffSAneesh Kumar K.V if (flags & AT_REMOVEDIR) { 57048e370ffSAneesh Kumar K.V clear_nlink(inode); 571ac89b2efSEryu Guan v9fs_dec_count(dir); 572b271ec47SAneesh Kumar K.V } else 573ac89b2efSEryu Guan v9fs_dec_count(inode); 574d28c61f0SAneesh Kumar K.V 57548e370ffSAneesh Kumar K.V v9fs_invalidate_inode_attr(inode); 576d28c61f0SAneesh Kumar K.V v9fs_invalidate_inode_attr(dir); 577154372e6SEric Van Hensbergen 578154372e6SEric Van Hensbergen /* invalidate all fids associated with dentry */ 579154372e6SEric Van Hensbergen /* NOTE: This will not include open fids */ 580154372e6SEric Van Hensbergen dentry->d_op->d_release(dentry); 581b271ec47SAneesh Kumar K.V } 582d994f405SAneesh Kumar K.V return retval; 5832bad8471SEric Van Hensbergen } 5842bad8471SEric Van Hensbergen 585bd238fb4SLatchesar Ionkov /** 586bd238fb4SLatchesar Ionkov * v9fs_create - Create a file 587ee443996SEric Van Hensbergen * @v9ses: session information 588ee443996SEric Van Hensbergen * @dir: directory that dentry is being created in 589bd238fb4SLatchesar Ionkov * @dentry: dentry that is being created 5900e15597eSAbhishek Kulkarni * @extension: 9p2000.u extension string to support devices, etc. 591bd238fb4SLatchesar Ionkov * @perm: create permissions 592bd238fb4SLatchesar Ionkov * @mode: open mode 593bd238fb4SLatchesar Ionkov * 594bd238fb4SLatchesar Ionkov */ 595bd238fb4SLatchesar Ionkov static struct p9_fid * 596bd238fb4SLatchesar Ionkov v9fs_create(struct v9fs_session_info *v9ses, struct inode *dir, 597bd238fb4SLatchesar Ionkov struct dentry *dentry, char *extension, u32 perm, u8 mode) 598bd238fb4SLatchesar Ionkov { 599bd238fb4SLatchesar Ionkov int err; 6007880b43bSAl Viro const unsigned char *name; 6016636b6dcSJianyong Wu struct p9_fid *dfid, *ofid = NULL, *fid = NULL; 602bd238fb4SLatchesar Ionkov struct inode *inode; 603bd238fb4SLatchesar Ionkov 6044b8e9923SAl Viro p9_debug(P9_DEBUG_VFS, "name %pd\n", dentry); 60551a87c55SEric Van Hensbergen 606bd238fb4SLatchesar Ionkov err = 0; 6077880b43bSAl Viro name = dentry->d_name.name; 60877d5a6b7SAl Viro dfid = v9fs_parent_fid(dentry); 609bd238fb4SLatchesar Ionkov if (IS_ERR(dfid)) { 610bd238fb4SLatchesar Ionkov err = PTR_ERR(dfid); 6115d385153SJoe Perches p9_debug(P9_DEBUG_VFS, "fid lookup failed %d\n", err); 6126d27e64dSVenkateswararao Jujjuri return ERR_PTR(err); 613bd238fb4SLatchesar Ionkov } 614bd238fb4SLatchesar Ionkov 615bd238fb4SLatchesar Ionkov /* clone a fid to use for creation */ 6167d50a29fSAl Viro ofid = clone_fid(dfid); 617bd238fb4SLatchesar Ionkov if (IS_ERR(ofid)) { 618bd238fb4SLatchesar Ionkov err = PTR_ERR(ofid); 6195d385153SJoe Perches p9_debug(P9_DEBUG_VFS, "p9_client_walk failed %d\n", err); 620dafbe689SDominique Martinet goto error; 621bd238fb4SLatchesar Ionkov } 622bd238fb4SLatchesar Ionkov 623bd238fb4SLatchesar Ionkov err = p9_client_fcreate(ofid, name, perm, mode, extension); 62451a87c55SEric Van Hensbergen if (err < 0) { 6255d385153SJoe Perches p9_debug(P9_DEBUG_VFS, "p9_client_fcreate failed %d\n", err); 626bd238fb4SLatchesar Ionkov goto error; 62751a87c55SEric Van Hensbergen } 628bd238fb4SLatchesar Ionkov 629b6054793SAneesh Kumar K.V if (!(perm & P9_DMLINK)) { 630bd238fb4SLatchesar Ionkov /* now walk from the parent so we can get unopened fid */ 6316d27e64dSVenkateswararao Jujjuri fid = p9_client_walk(dfid, 1, &name, 1); 632bd238fb4SLatchesar Ionkov if (IS_ERR(fid)) { 633bd238fb4SLatchesar Ionkov err = PTR_ERR(fid); 634b6054793SAneesh Kumar K.V p9_debug(P9_DEBUG_VFS, 635b6054793SAneesh Kumar K.V "p9_client_walk failed %d\n", err); 636bd238fb4SLatchesar Ionkov goto error; 6376d27e64dSVenkateswararao Jujjuri } 638b6054793SAneesh Kumar K.V /* 639b6054793SAneesh Kumar K.V * instantiate inode and assign the unopened fid to the dentry 640b6054793SAneesh Kumar K.V */ 641ed80fcfaSAneesh Kumar K.V inode = v9fs_get_new_inode_from_fid(v9ses, fid, dir->i_sb); 642bd238fb4SLatchesar Ionkov if (IS_ERR(inode)) { 643bd238fb4SLatchesar Ionkov err = PTR_ERR(inode); 644b6054793SAneesh Kumar K.V p9_debug(P9_DEBUG_VFS, 645b6054793SAneesh Kumar K.V "inode creation failed %d\n", err); 646bd238fb4SLatchesar Ionkov goto error; 647bd238fb4SLatchesar Ionkov } 648dafbe689SDominique Martinet v9fs_fid_add(dentry, &fid); 6495441ae5eSAneesh Kumar K.V d_instantiate(dentry, inode); 650b6054793SAneesh Kumar K.V } 651b48dbb99SDominique Martinet p9_fid_put(dfid); 652bd238fb4SLatchesar Ionkov return ofid; 653bd238fb4SLatchesar Ionkov error: 654dafbe689SDominique Martinet p9_fid_put(dfid); 655b48dbb99SDominique Martinet p9_fid_put(ofid); 656b48dbb99SDominique Martinet p9_fid_put(fid); 657bd238fb4SLatchesar Ionkov return ERR_PTR(err); 658bd238fb4SLatchesar Ionkov } 659bd238fb4SLatchesar Ionkov 6602bad8471SEric Van Hensbergen /** 661e43ae79cSMiklos Szeredi * v9fs_vfs_create - VFS hook to create a regular file 6626c960e68SChristian Brauner * @idmap: idmap of the mount 663bc868036SDavid Howells * @dir: The parent directory 664bc868036SDavid Howells * @dentry: The name of file to be created 665bc868036SDavid Howells * @mode: The UNIX file mode to set 666bc868036SDavid Howells * @excl: True if the file must not yet exist 667e43ae79cSMiklos Szeredi * 668e43ae79cSMiklos Szeredi * open(.., O_CREAT) is handled in v9fs_vfs_atomic_open(). This is only called 669e43ae79cSMiklos Szeredi * for mknod(2). 670e43ae79cSMiklos Szeredi * 6712bad8471SEric Van Hensbergen */ 6722bad8471SEric Van Hensbergen 6732bad8471SEric Van Hensbergen static int 6746c960e68SChristian Brauner v9fs_vfs_create(struct mnt_idmap *idmap, struct inode *dir, 675549c7297SChristian Brauner struct dentry *dentry, umode_t mode, bool excl) 6762bad8471SEric Van Hensbergen { 677e43ae79cSMiklos Szeredi struct v9fs_session_info *v9ses = v9fs_inode2v9ses(dir); 678e43ae79cSMiklos Szeredi u32 perm = unixmode2p9mode(v9ses, mode); 679e43ae79cSMiklos Szeredi struct p9_fid *fid; 6806a3124a3SLatchesar Ionkov 681e43ae79cSMiklos Szeredi /* P9_OEXCL? */ 682e43ae79cSMiklos Szeredi fid = v9fs_create(v9ses, dir, dentry, NULL, perm, P9_ORDWR); 683e43ae79cSMiklos Szeredi if (IS_ERR(fid)) 684e43ae79cSMiklos Szeredi return PTR_ERR(fid); 6856a3124a3SLatchesar Ionkov 686d28c61f0SAneesh Kumar K.V v9fs_invalidate_inode_attr(dir); 687b48dbb99SDominique Martinet p9_fid_put(fid); 6886a3124a3SLatchesar Ionkov 6896a3124a3SLatchesar Ionkov return 0; 6902bad8471SEric Van Hensbergen } 6912bad8471SEric Van Hensbergen 6922bad8471SEric Van Hensbergen /** 6932bad8471SEric Van Hensbergen * v9fs_vfs_mkdir - VFS mkdir hook to create a directory 694c54bd91eSChristian Brauner * @idmap: idmap of the mount 695ee443996SEric Van Hensbergen * @dir: inode that is being unlinked 6962bad8471SEric Van Hensbergen * @dentry: dentry that is being unlinked 6972bad8471SEric Van Hensbergen * @mode: mode for new directory 6982bad8471SEric Van Hensbergen * 6992bad8471SEric Van Hensbergen */ 7002bad8471SEric Van Hensbergen 701c54bd91eSChristian Brauner static int v9fs_vfs_mkdir(struct mnt_idmap *idmap, struct inode *dir, 702549c7297SChristian Brauner struct dentry *dentry, umode_t mode) 7032bad8471SEric Van Hensbergen { 7046a3124a3SLatchesar Ionkov int err; 705bd238fb4SLatchesar Ionkov u32 perm; 706bd238fb4SLatchesar Ionkov struct p9_fid *fid; 707d28c61f0SAneesh Kumar K.V struct v9fs_session_info *v9ses; 7086a3124a3SLatchesar Ionkov 7094b8e9923SAl Viro p9_debug(P9_DEBUG_VFS, "name %pd\n", dentry); 710bd238fb4SLatchesar Ionkov err = 0; 7116a3124a3SLatchesar Ionkov v9ses = v9fs_inode2v9ses(dir); 7126a3124a3SLatchesar Ionkov perm = unixmode2p9mode(v9ses, mode | S_IFDIR); 713bd238fb4SLatchesar Ionkov fid = v9fs_create(v9ses, dir, dentry, NULL, perm, P9_OREAD); 714bd238fb4SLatchesar Ionkov if (IS_ERR(fid)) { 715bd238fb4SLatchesar Ionkov err = PTR_ERR(fid); 716bd238fb4SLatchesar Ionkov fid = NULL; 717d28c61f0SAneesh Kumar K.V } else { 718b271ec47SAneesh Kumar K.V inc_nlink(dir); 719d28c61f0SAneesh Kumar K.V v9fs_invalidate_inode_attr(dir); 720d28c61f0SAneesh Kumar K.V } 7216a3124a3SLatchesar Ionkov 722bd238fb4SLatchesar Ionkov if (fid) 723b48dbb99SDominique Martinet p9_fid_put(fid); 7246a3124a3SLatchesar Ionkov 7256a3124a3SLatchesar Ionkov return err; 7262bad8471SEric Van Hensbergen } 7272bad8471SEric Van Hensbergen 7282bad8471SEric Van Hensbergen /** 7292bad8471SEric Van Hensbergen * v9fs_vfs_lookup - VFS lookup hook to "walk" to a new inode 7302bad8471SEric Van Hensbergen * @dir: inode that is being walked from 7312bad8471SEric Van Hensbergen * @dentry: dentry that is being walked to? 732fd2916bdSFabian Frederick * @flags: lookup flags (unused) 7332bad8471SEric Van Hensbergen * 7342bad8471SEric Van Hensbergen */ 7352bad8471SEric Van Hensbergen 73653c06f4eSAneesh Kumar K.V struct dentry *v9fs_vfs_lookup(struct inode *dir, struct dentry *dentry, 73700cd8dd3SAl Viro unsigned int flags) 7382bad8471SEric Van Hensbergen { 73973f50717SAneesh Kumar K.V struct dentry *res; 7402bad8471SEric Van Hensbergen struct v9fs_session_info *v9ses; 741bd238fb4SLatchesar Ionkov struct p9_fid *dfid, *fid; 7422bad8471SEric Van Hensbergen struct inode *inode; 7437880b43bSAl Viro const unsigned char *name; 7442bad8471SEric Van Hensbergen 7454b8e9923SAl Viro p9_debug(P9_DEBUG_VFS, "dir: %p dentry: (%pd) %p flags: %x\n", 7464b8e9923SAl Viro dir, dentry, dentry, flags); 7472bad8471SEric Van Hensbergen 74811e9b49bSSripathi Kodi if (dentry->d_name.len > NAME_MAX) 74911e9b49bSSripathi Kodi return ERR_PTR(-ENAMETOOLONG); 75011e9b49bSSripathi Kodi 7512bad8471SEric Van Hensbergen v9ses = v9fs_inode2v9ses(dir); 752a534c8d1SAneesh Kumar K.V /* We can walk d_parent because we hold the dir->i_mutex */ 75377d5a6b7SAl Viro dfid = v9fs_parent_fid(dentry); 754bd238fb4SLatchesar Ionkov if (IS_ERR(dfid)) 755e231c2eeSDavid Howells return ERR_CAST(dfid); 7562bad8471SEric Van Hensbergen 75773f50717SAneesh Kumar K.V /* 75873f50717SAneesh Kumar K.V * Make sure we don't use a wrong inode due to parallel 75973f50717SAneesh Kumar K.V * unlink. For cached mode create calls request for new 76073f50717SAneesh Kumar K.V * inode. But with cache disabled, lookup should do this. 76173f50717SAneesh Kumar K.V */ 762500e2ab6SAl Viro name = dentry->d_name.name; 763500e2ab6SAl Viro fid = p9_client_walk(dfid, 1, &name, 1); 764b48dbb99SDominique Martinet p9_fid_put(dfid); 765500e2ab6SAl Viro if (fid == ERR_PTR(-ENOENT)) 766500e2ab6SAl Viro inode = NULL; 767500e2ab6SAl Viro else if (IS_ERR(fid)) 768500e2ab6SAl Viro inode = ERR_CAST(fid); 7694eb31178SEric Van Hensbergen else if (v9ses->cache & (CACHE_META|CACHE_LOOSE)) 770a78ce05dSAneesh Kumar K.V inode = v9fs_get_inode_from_fid(v9ses, fid, dir->i_sb); 77173f50717SAneesh Kumar K.V else 77273f50717SAneesh Kumar K.V inode = v9fs_get_new_inode_from_fid(v9ses, fid, dir->i_sb); 77373f50717SAneesh Kumar K.V /* 77473f50717SAneesh Kumar K.V * If we had a rename on the server and a parallel lookup 77573f50717SAneesh Kumar K.V * for the new name, then make sure we instantiate with 77673f50717SAneesh Kumar K.V * the new name. ie look up for a/b, while on server somebody 77773f50717SAneesh Kumar K.V * moved b under k and client parallely did a lookup for 77873f50717SAneesh Kumar K.V * k/b. 77973f50717SAneesh Kumar K.V */ 78041d28bcaSAl Viro res = d_splice_alias(inode, dentry); 781500e2ab6SAl Viro if (!IS_ERR(fid)) { 782a3b2157eSAl Viro if (!res) 783dafbe689SDominique Martinet v9fs_fid_add(dentry, &fid); 784a3b2157eSAl Viro else if (!IS_ERR(res)) 785dafbe689SDominique Martinet v9fs_fid_add(res, &fid); 786a3b2157eSAl Viro else 787b48dbb99SDominique Martinet p9_fid_put(fid); 788500e2ab6SAl Viro } 7897b5be621SAl Viro return res; 7902bad8471SEric Van Hensbergen } 7912bad8471SEric Van Hensbergen 792d9585277SAl Viro static int 793e43ae79cSMiklos Szeredi v9fs_vfs_atomic_open(struct inode *dir, struct dentry *dentry, 7946e195b0fSDominique Martinet struct file *file, unsigned int flags, umode_t mode) 795e43ae79cSMiklos Szeredi { 796e43ae79cSMiklos Szeredi int err; 797e43ae79cSMiklos Szeredi u32 perm; 7984eb31178SEric Van Hensbergen struct v9fs_inode __maybe_unused *v9inode; 799e43ae79cSMiklos Szeredi struct v9fs_session_info *v9ses; 8001543b4c5SEric Van Hensbergen struct p9_fid *fid; 801e43ae79cSMiklos Szeredi struct dentry *res = NULL; 802987a6485SGreg Kurz struct inode *inode; 8031543b4c5SEric Van Hensbergen int p9_omode; 804e43ae79cSMiklos Szeredi 80500699ad8SAl Viro if (d_in_lookup(dentry)) { 80600cd8dd3SAl Viro res = v9fs_vfs_lookup(dir, dentry, 0); 807e43ae79cSMiklos Szeredi if (IS_ERR(res)) 808d9585277SAl Viro return PTR_ERR(res); 809e43ae79cSMiklos Szeredi 810e43ae79cSMiklos Szeredi if (res) 811e43ae79cSMiklos Szeredi dentry = res; 812e43ae79cSMiklos Szeredi } 813e43ae79cSMiklos Szeredi 814e43ae79cSMiklos Szeredi /* Only creates */ 8152b0143b5SDavid Howells if (!(flags & O_CREAT) || d_really_is_positive(dentry)) 816e45198a6SAl Viro return finish_no_open(file, res); 817e43ae79cSMiklos Szeredi 818e43ae79cSMiklos Szeredi err = 0; 819fae74696SGeyslan G. Bem 820e43ae79cSMiklos Szeredi v9ses = v9fs_inode2v9ses(dir); 821e43ae79cSMiklos Szeredi perm = unixmode2p9mode(v9ses, mode); 8221543b4c5SEric Van Hensbergen p9_omode = v9fs_uflags2omode(flags, v9fs_proto_dotu(v9ses)); 8231543b4c5SEric Van Hensbergen 8244eb31178SEric Van Hensbergen if ((v9ses->cache & CACHE_WRITEBACK) && (p9_omode & P9_OWRITE)) { 82521e26d5eSEric Van Hensbergen p9_omode = (p9_omode & ~P9_OWRITE) | P9_ORDWR; 8261543b4c5SEric Van Hensbergen p9_debug(P9_DEBUG_CACHE, 8271543b4c5SEric Van Hensbergen "write-only file with writeback enabled, creating w/ O_RDWR\n"); 8281543b4c5SEric Van Hensbergen } 8291543b4c5SEric Van Hensbergen fid = v9fs_create(v9ses, dir, dentry, NULL, perm, p9_omode); 830e43ae79cSMiklos Szeredi if (IS_ERR(fid)) { 831e43ae79cSMiklos Szeredi err = PTR_ERR(fid); 832e43ae79cSMiklos Szeredi goto error; 833e43ae79cSMiklos Szeredi } 834e43ae79cSMiklos Szeredi 835e43ae79cSMiklos Szeredi v9fs_invalidate_inode_attr(dir); 836987a6485SGreg Kurz inode = d_inode(dentry); 837987a6485SGreg Kurz v9inode = V9FS_I(inode); 838be12af3eSAl Viro err = finish_open(file, dentry, generic_file_open); 83930d90494SAl Viro if (err) 840e43ae79cSMiklos Szeredi goto error; 841e43ae79cSMiklos Szeredi 84230d90494SAl Viro file->private_data = fid; 8434eb31178SEric Van Hensbergen #ifdef CONFIG_9P_FSCACHE 8444eb31178SEric Van Hensbergen if (v9ses->cache & CACHE_FSCACHE) 84524e42e32SDavid Howells fscache_use_cookie(v9fs_inode_cookie(v9inode), 84624e42e32SDavid Howells file->f_mode & FMODE_WRITE); 8474eb31178SEric Van Hensbergen #endif 8481543b4c5SEric Van Hensbergen 8491543b4c5SEric Van Hensbergen v9fs_fid_add_modes(fid, v9ses->flags, v9ses->cache, file->f_flags); 850dafbe689SDominique Martinet v9fs_open_fid_add(inode, &fid); 851e43ae79cSMiklos Szeredi 85273a09dd9SAl Viro file->f_mode |= FMODE_CREATED; 853e43ae79cSMiklos Szeredi out: 854e43ae79cSMiklos Szeredi dput(res); 855d9585277SAl Viro return err; 856e43ae79cSMiklos Szeredi 857e43ae79cSMiklos Szeredi error: 858b48dbb99SDominique Martinet p9_fid_put(fid); 859e43ae79cSMiklos Szeredi goto out; 860e43ae79cSMiklos Szeredi } 861e43ae79cSMiklos Szeredi 8622bad8471SEric Van Hensbergen /** 8632bad8471SEric Van Hensbergen * v9fs_vfs_unlink - VFS unlink hook to delete an inode 8642bad8471SEric Van Hensbergen * @i: inode that is being unlinked 86573c592b9SEric Van Hensbergen * @d: dentry that is being unlinked 8662bad8471SEric Van Hensbergen * 8672bad8471SEric Van Hensbergen */ 8682bad8471SEric Van Hensbergen 86953c06f4eSAneesh Kumar K.V int v9fs_vfs_unlink(struct inode *i, struct dentry *d) 8702bad8471SEric Van Hensbergen { 8712bad8471SEric Van Hensbergen return v9fs_remove(i, d, 0); 8722bad8471SEric Van Hensbergen } 8732bad8471SEric Van Hensbergen 8742bad8471SEric Van Hensbergen /** 8752bad8471SEric Van Hensbergen * v9fs_vfs_rmdir - VFS unlink hook to delete a directory 8762bad8471SEric Van Hensbergen * @i: inode that is being unlinked 87773c592b9SEric Van Hensbergen * @d: dentry that is being unlinked 8782bad8471SEric Van Hensbergen * 8792bad8471SEric Van Hensbergen */ 8802bad8471SEric Van Hensbergen 88153c06f4eSAneesh Kumar K.V int v9fs_vfs_rmdir(struct inode *i, struct dentry *d) 8822bad8471SEric Van Hensbergen { 88348e370ffSAneesh Kumar K.V return v9fs_remove(i, d, AT_REMOVEDIR); 8842bad8471SEric Van Hensbergen } 8852bad8471SEric Van Hensbergen 8862bad8471SEric Van Hensbergen /** 8872bad8471SEric Van Hensbergen * v9fs_vfs_rename - VFS hook to rename an inode 888e18275aeSChristian Brauner * @idmap: The idmap of the mount 8892bad8471SEric Van Hensbergen * @old_dir: old dir inode 8902bad8471SEric Van Hensbergen * @old_dentry: old dentry 8912bad8471SEric Van Hensbergen * @new_dir: new dir inode 8922bad8471SEric Van Hensbergen * @new_dentry: new dentry 893bc868036SDavid Howells * @flags: RENAME_* flags 8942bad8471SEric Van Hensbergen * 8952bad8471SEric Van Hensbergen */ 8962bad8471SEric Van Hensbergen 89753c06f4eSAneesh Kumar K.V int 898e18275aeSChristian Brauner v9fs_vfs_rename(struct mnt_idmap *idmap, struct inode *old_dir, 899549c7297SChristian Brauner struct dentry *old_dentry, struct inode *new_dir, 900549c7297SChristian Brauner struct dentry *new_dentry, unsigned int flags) 9012bad8471SEric Van Hensbergen { 902d28c61f0SAneesh Kumar K.V int retval; 903bd238fb4SLatchesar Ionkov struct inode *old_inode; 904b271ec47SAneesh Kumar K.V struct inode *new_inode; 905bd238fb4SLatchesar Ionkov struct v9fs_session_info *v9ses; 906dafbe689SDominique Martinet struct p9_fid *oldfid = NULL, *dfid = NULL; 907dafbe689SDominique Martinet struct p9_fid *olddirfid = NULL; 908dafbe689SDominique Martinet struct p9_fid *newdirfid = NULL; 909bd238fb4SLatchesar Ionkov struct p9_wstat wstat; 9102bad8471SEric Van Hensbergen 9111cd66c93SMiklos Szeredi if (flags) 9121cd66c93SMiklos Szeredi return -EINVAL; 9131cd66c93SMiklos Szeredi 9145d385153SJoe Perches p9_debug(P9_DEBUG_VFS, "\n"); 915bd238fb4SLatchesar Ionkov retval = 0; 9162b0143b5SDavid Howells old_inode = d_inode(old_dentry); 9172b0143b5SDavid Howells new_inode = d_inode(new_dentry); 918bd238fb4SLatchesar Ionkov v9ses = v9fs_inode2v9ses(old_inode); 919bd238fb4SLatchesar Ionkov oldfid = v9fs_fid_lookup(old_dentry); 920da977b2cSEric Van Hensbergen if (IS_ERR(oldfid)) 921da977b2cSEric Van Hensbergen return PTR_ERR(oldfid); 922da977b2cSEric Van Hensbergen 9236636b6dcSJianyong Wu dfid = v9fs_parent_fid(old_dentry); 9246636b6dcSJianyong Wu olddirfid = clone_fid(dfid); 925b48dbb99SDominique Martinet p9_fid_put(dfid); 926dafbe689SDominique Martinet dfid = NULL; 9276636b6dcSJianyong Wu 928da977b2cSEric Van Hensbergen if (IS_ERR(olddirfid)) { 929da977b2cSEric Van Hensbergen retval = PTR_ERR(olddirfid); 930dafbe689SDominique Martinet goto error; 931da977b2cSEric Van Hensbergen } 932da977b2cSEric Van Hensbergen 9336636b6dcSJianyong Wu dfid = v9fs_parent_fid(new_dentry); 9346636b6dcSJianyong Wu newdirfid = clone_fid(dfid); 935b48dbb99SDominique Martinet p9_fid_put(dfid); 936dafbe689SDominique Martinet dfid = NULL; 9376636b6dcSJianyong Wu 938da977b2cSEric Van Hensbergen if (IS_ERR(newdirfid)) { 939da977b2cSEric Van Hensbergen retval = PTR_ERR(newdirfid); 940dafbe689SDominique Martinet goto error; 9412bad8471SEric Van Hensbergen } 9422bad8471SEric Van Hensbergen 943a534c8d1SAneesh Kumar K.V down_write(&v9ses->rename_sem); 9444681dbdaSSripathi Kodi if (v9fs_proto_dotl(v9ses)) { 9459e8fb38eSAneesh Kumar K.V retval = p9_client_renameat(olddirfid, old_dentry->d_name.name, 9469e8fb38eSAneesh Kumar K.V newdirfid, new_dentry->d_name.name); 9479e8fb38eSAneesh Kumar K.V if (retval == -EOPNOTSUPP) 9484681dbdaSSripathi Kodi retval = p9_client_rename(oldfid, newdirfid, 9499e8fb38eSAneesh Kumar K.V new_dentry->d_name.name); 9509e8fb38eSAneesh Kumar K.V if (retval != -EOPNOTSUPP) 951dafbe689SDominique Martinet goto error_locked; 9524681dbdaSSripathi Kodi } 953a534c8d1SAneesh Kumar K.V if (old_dentry->d_parent != new_dentry->d_parent) { 954a534c8d1SAneesh Kumar K.V /* 955a534c8d1SAneesh Kumar K.V * 9P .u can only handle file rename in the same directory 956a534c8d1SAneesh Kumar K.V */ 9574681dbdaSSripathi Kodi 9585d385153SJoe Perches p9_debug(P9_DEBUG_ERROR, "old dir and new dir are different\n"); 959621997cdSEric Van Hensbergen retval = -EXDEV; 960dafbe689SDominique Martinet goto error_locked; 9612bad8471SEric Van Hensbergen } 962531b1094SLatchesar Ionkov v9fs_blank_wstat(&wstat); 963ba17674fSLatchesar Ionkov wstat.muid = v9ses->uname; 9647880b43bSAl Viro wstat.name = new_dentry->d_name.name; 965bd238fb4SLatchesar Ionkov retval = p9_client_wstat(oldfid, &wstat); 9662bad8471SEric Van Hensbergen 967dafbe689SDominique Martinet error_locked: 968b271ec47SAneesh Kumar K.V if (!retval) { 969b271ec47SAneesh Kumar K.V if (new_inode) { 970b271ec47SAneesh Kumar K.V if (S_ISDIR(new_inode->i_mode)) 971b271ec47SAneesh Kumar K.V clear_nlink(new_inode); 972b271ec47SAneesh Kumar K.V else 973ac89b2efSEryu Guan v9fs_dec_count(new_inode); 974b271ec47SAneesh Kumar K.V } 975b271ec47SAneesh Kumar K.V if (S_ISDIR(old_inode->i_mode)) { 976b271ec47SAneesh Kumar K.V if (!new_inode) 977b271ec47SAneesh Kumar K.V inc_nlink(new_dir); 978ac89b2efSEryu Guan v9fs_dec_count(old_dir); 979b271ec47SAneesh Kumar K.V } 9803bc86de3SAneesh Kumar K.V v9fs_invalidate_inode_attr(old_inode); 981d28c61f0SAneesh Kumar K.V v9fs_invalidate_inode_attr(old_dir); 982d28c61f0SAneesh Kumar K.V v9fs_invalidate_inode_attr(new_dir); 9833bc86de3SAneesh Kumar K.V 984a534c8d1SAneesh Kumar K.V /* successful rename */ 985a534c8d1SAneesh Kumar K.V d_move(old_dentry, new_dentry); 986b271ec47SAneesh Kumar K.V } 987a534c8d1SAneesh Kumar K.V up_write(&v9ses->rename_sem); 988dafbe689SDominique Martinet 989dafbe689SDominique Martinet error: 990b48dbb99SDominique Martinet p9_fid_put(newdirfid); 991b48dbb99SDominique Martinet p9_fid_put(olddirfid); 992b48dbb99SDominique Martinet p9_fid_put(oldfid); 9932bad8471SEric Van Hensbergen return retval; 9942bad8471SEric Van Hensbergen } 9952bad8471SEric Van Hensbergen 9962bad8471SEric Van Hensbergen /** 997943ffb58SAdrian Bunk * v9fs_vfs_getattr - retrieve file metadata 998b74d24f7SChristian Brauner * @idmap: idmap of the mount 999a528d35eSDavid Howells * @path: Object to query 1000ee443996SEric Van Hensbergen * @stat: metadata structure to populate 1001a528d35eSDavid Howells * @request_mask: Mask of STATX_xxx flags indicating the caller's interests 1002a528d35eSDavid Howells * @flags: AT_STATX_xxx setting 10032bad8471SEric Van Hensbergen * 10042bad8471SEric Van Hensbergen */ 10052bad8471SEric Van Hensbergen 10062bad8471SEric Van Hensbergen static int 1007b74d24f7SChristian Brauner v9fs_vfs_getattr(struct mnt_idmap *idmap, const struct path *path, 1008549c7297SChristian Brauner struct kstat *stat, u32 request_mask, unsigned int flags) 10092bad8471SEric Van Hensbergen { 1010a528d35eSDavid Howells struct dentry *dentry = path->dentry; 1011d9bc0d11SEric Van Hensbergen struct inode *inode = d_inode(dentry); 1012bd238fb4SLatchesar Ionkov struct v9fs_session_info *v9ses; 1013bd238fb4SLatchesar Ionkov struct p9_fid *fid; 101451a87c55SEric Van Hensbergen struct p9_wstat *st; 10152bad8471SEric Van Hensbergen 10165d385153SJoe Perches p9_debug(P9_DEBUG_VFS, "dentry: %p\n", dentry); 101742869c8aSAneesh Kumar K.V v9ses = v9fs_dentry2v9ses(dentry); 10184eb31178SEric Van Hensbergen if (v9ses->cache & (CACHE_META|CACHE_LOOSE)) { 1019*0d72b928SJeff Layton generic_fillattr(&nop_mnt_idmap, request_mask, inode, stat); 1020a1211908SAneesh Kumar K.V return 0; 10214eb31178SEric Van Hensbergen } else if (v9ses->cache & CACHE_WRITEBACK) { 1022d9bc0d11SEric Van Hensbergen if (S_ISREG(inode->i_mode)) { 1023d9bc0d11SEric Van Hensbergen int retval = filemap_fdatawrite(inode->i_mapping); 1024d9bc0d11SEric Van Hensbergen 1025d9bc0d11SEric Van Hensbergen if (retval) 1026d9bc0d11SEric Van Hensbergen p9_debug(P9_DEBUG_ERROR, 1027d9bc0d11SEric Van Hensbergen "flushing writeback during getattr returned %d\n", retval); 1028d9bc0d11SEric Van Hensbergen } 1029a1211908SAneesh Kumar K.V } 1030bd238fb4SLatchesar Ionkov fid = v9fs_fid_lookup(dentry); 1031da977b2cSEric Van Hensbergen if (IS_ERR(fid)) 1032da977b2cSEric Van Hensbergen return PTR_ERR(fid); 10332bad8471SEric Van Hensbergen 1034bd238fb4SLatchesar Ionkov st = p9_client_stat(fid); 1035b48dbb99SDominique Martinet p9_fid_put(fid); 1036bd238fb4SLatchesar Ionkov if (IS_ERR(st)) 1037bd238fb4SLatchesar Ionkov return PTR_ERR(st); 10382bad8471SEric Van Hensbergen 10395e3cc1eeSHou Tao v9fs_stat2inode(st, d_inode(dentry), dentry->d_sb, 0); 1040*0d72b928SJeff Layton generic_fillattr(&nop_mnt_idmap, request_mask, d_inode(dentry), stat); 10412bad8471SEric Van Hensbergen 104262b2be59SLatchesar Ionkov p9stat_free(st); 1043bd238fb4SLatchesar Ionkov kfree(st); 1044bd238fb4SLatchesar Ionkov return 0; 10452bad8471SEric Van Hensbergen } 10462bad8471SEric Van Hensbergen 10472bad8471SEric Van Hensbergen /** 10482bad8471SEric Van Hensbergen * v9fs_vfs_setattr - set file metadata 1049c1632a0fSChristian Brauner * @idmap: idmap of the mount 10502bad8471SEric Van Hensbergen * @dentry: file whose metadata to set 10512bad8471SEric Van Hensbergen * @iattr: metadata assignment structure 10522bad8471SEric Van Hensbergen * 10532bad8471SEric Van Hensbergen */ 10542bad8471SEric Van Hensbergen 1055c1632a0fSChristian Brauner static int v9fs_vfs_setattr(struct mnt_idmap *idmap, 1056549c7297SChristian Brauner struct dentry *dentry, struct iattr *iattr) 10572bad8471SEric Van Hensbergen { 10586636b6dcSJianyong Wu int retval, use_dentry = 0; 105924e42e32SDavid Howells struct inode *inode = d_inode(dentry); 1060bd238fb4SLatchesar Ionkov struct v9fs_session_info *v9ses; 106166246641SJianyong Wu struct p9_fid *fid = NULL; 1062bd238fb4SLatchesar Ionkov struct p9_wstat wstat; 10632bad8471SEric Van Hensbergen 10645d385153SJoe Perches p9_debug(P9_DEBUG_VFS, "\n"); 1065c1632a0fSChristian Brauner retval = setattr_prepare(&nop_mnt_idmap, dentry, iattr); 1066059c138bSAneesh Kumar K.V if (retval) 1067059c138bSAneesh Kumar K.V return retval; 1068059c138bSAneesh Kumar K.V 1069bd238fb4SLatchesar Ionkov retval = -EPERM; 107042869c8aSAneesh Kumar K.V v9ses = v9fs_dentry2v9ses(dentry); 107166246641SJianyong Wu if (iattr->ia_valid & ATTR_FILE) { 107266246641SJianyong Wu fid = iattr->ia_file->private_data; 107366246641SJianyong Wu WARN_ON(!fid); 107466246641SJianyong Wu } 10756636b6dcSJianyong Wu if (!fid) { 1076bd238fb4SLatchesar Ionkov fid = v9fs_fid_lookup(dentry); 10776636b6dcSJianyong Wu use_dentry = 1; 10786636b6dcSJianyong Wu } 1079da977b2cSEric Van Hensbergen if (IS_ERR(fid)) 1080da977b2cSEric Van Hensbergen return PTR_ERR(fid); 10812bad8471SEric Van Hensbergen 1082531b1094SLatchesar Ionkov v9fs_blank_wstat(&wstat); 10832bad8471SEric Van Hensbergen if (iattr->ia_valid & ATTR_MODE) 1084531b1094SLatchesar Ionkov wstat.mode = unixmode2p9mode(v9ses, iattr->ia_mode); 10852bad8471SEric Van Hensbergen 10862bad8471SEric Van Hensbergen if (iattr->ia_valid & ATTR_MTIME) 1087531b1094SLatchesar Ionkov wstat.mtime = iattr->ia_mtime.tv_sec; 10882bad8471SEric Van Hensbergen 10892bad8471SEric Van Hensbergen if (iattr->ia_valid & ATTR_ATIME) 1090531b1094SLatchesar Ionkov wstat.atime = iattr->ia_atime.tv_sec; 10912bad8471SEric Van Hensbergen 10922bad8471SEric Van Hensbergen if (iattr->ia_valid & ATTR_SIZE) 1093531b1094SLatchesar Ionkov wstat.length = iattr->ia_size; 10942bad8471SEric Van Hensbergen 1095dd6102fbSSripathi Kodi if (v9fs_proto_dotu(v9ses)) { 1096531b1094SLatchesar Ionkov if (iattr->ia_valid & ATTR_UID) 1097531b1094SLatchesar Ionkov wstat.n_uid = iattr->ia_uid; 10982bad8471SEric Van Hensbergen 1099531b1094SLatchesar Ionkov if (iattr->ia_valid & ATTR_GID) 1100531b1094SLatchesar Ionkov wstat.n_gid = iattr->ia_gid; 11012bad8471SEric Van Hensbergen } 1102059c138bSAneesh Kumar K.V 11033dc5436aSAneesh Kumar K.V /* Write all dirty data */ 1104d9bc0d11SEric Van Hensbergen if (d_is_reg(dentry)) { 1105d9bc0d11SEric Van Hensbergen retval = filemap_fdatawrite(inode->i_mapping); 1106d9bc0d11SEric Van Hensbergen if (retval) 1107d9bc0d11SEric Van Hensbergen p9_debug(P9_DEBUG_ERROR, 1108d9bc0d11SEric Van Hensbergen "flushing writeback during setattr returned %d\n", retval); 1109d9bc0d11SEric Van Hensbergen } 11103dc5436aSAneesh Kumar K.V 1111f10fc50fSAneesh Kumar K.V retval = p9_client_wstat(fid, &wstat); 11126636b6dcSJianyong Wu 11136636b6dcSJianyong Wu if (use_dentry) 1114b48dbb99SDominique Martinet p9_fid_put(fid); 11156636b6dcSJianyong Wu 1116f10fc50fSAneesh Kumar K.V if (retval < 0) 1117f10fc50fSAneesh Kumar K.V return retval; 1118059c138bSAneesh Kumar K.V 1119059c138bSAneesh Kumar K.V if ((iattr->ia_valid & ATTR_SIZE) && 112024e42e32SDavid Howells iattr->ia_size != i_size_read(inode)) { 112124e42e32SDavid Howells truncate_setsize(inode, iattr->ia_size); 11221543b4c5SEric Van Hensbergen truncate_pagecache(inode, iattr->ia_size); 11231543b4c5SEric Van Hensbergen 11244eb31178SEric Van Hensbergen #ifdef CONFIG_9P_FSCACHE 11254eb31178SEric Van Hensbergen if (v9ses->cache & CACHE_FSCACHE) { 11264eb31178SEric Van Hensbergen struct v9fs_inode *v9inode = V9FS_I(inode); 11274eb31178SEric Van Hensbergen 112824e42e32SDavid Howells fscache_resize_cookie(v9fs_inode_cookie(v9inode), iattr->ia_size); 112924e42e32SDavid Howells } 11304eb31178SEric Van Hensbergen #endif 11314eb31178SEric Van Hensbergen } 1132059c138bSAneesh Kumar K.V 113324e42e32SDavid Howells v9fs_invalidate_inode_attr(inode); 11341025774cSChristoph Hellwig 1135c1632a0fSChristian Brauner setattr_copy(&nop_mnt_idmap, inode, iattr); 113624e42e32SDavid Howells mark_inode_dirty(inode); 11371025774cSChristoph Hellwig return 0; 11382bad8471SEric Van Hensbergen } 11392bad8471SEric Van Hensbergen 11402bad8471SEric Van Hensbergen /** 1141531b1094SLatchesar Ionkov * v9fs_stat2inode - populate an inode structure with mistat info 1142531b1094SLatchesar Ionkov * @stat: Plan 9 metadata (mistat) structure 11432bad8471SEric Van Hensbergen * @inode: inode to populate 11442bad8471SEric Van Hensbergen * @sb: superblock of filesystem 11455e3cc1eeSHou Tao * @flags: control flags (e.g. V9FS_STAT2INODE_KEEP_ISIZE) 11462bad8471SEric Van Hensbergen * 11472bad8471SEric Van Hensbergen */ 11482bad8471SEric Van Hensbergen 11492bad8471SEric Van Hensbergen void 115051a87c55SEric Van Hensbergen v9fs_stat2inode(struct p9_wstat *stat, struct inode *inode, 11515e3cc1eeSHou Tao struct super_block *sb, unsigned int flags) 11522bad8471SEric Van Hensbergen { 11533eda0de6SAl Viro umode_t mode; 11542bad8471SEric Van Hensbergen struct v9fs_session_info *v9ses = sb->s_fs_info; 1155b3cbea03SAneesh Kumar K.V struct v9fs_inode *v9inode = V9FS_I(inode); 11562bad8471SEric Van Hensbergen 1157bfe86848SMiklos Szeredi set_nlink(inode, 1); 11582bad8471SEric Van Hensbergen 1159531b1094SLatchesar Ionkov inode->i_atime.tv_sec = stat->atime; 1160531b1094SLatchesar Ionkov inode->i_mtime.tv_sec = stat->mtime; 11614f871800SJeff Layton inode_set_ctime(inode, stat->mtime, 0); 11622bad8471SEric Van Hensbergen 1163bd32b82dSLatchesar Ionkov inode->i_uid = v9ses->dfltuid; 1164bd32b82dSLatchesar Ionkov inode->i_gid = v9ses->dfltgid; 11652bad8471SEric Van Hensbergen 1166dd6102fbSSripathi Kodi if (v9fs_proto_dotu(v9ses)) { 1167531b1094SLatchesar Ionkov inode->i_uid = stat->n_uid; 1168531b1094SLatchesar Ionkov inode->i_gid = stat->n_gid; 1169531b1094SLatchesar Ionkov } 11705717144aSAneesh Kumar K.V if ((S_ISREG(inode->i_mode)) || (S_ISDIR(inode->i_mode))) { 11719652c732SAl Viro if (v9fs_proto_dotu(v9ses)) { 11729652c732SAl Viro unsigned int i_nlink; 11735717144aSAneesh Kumar K.V /* 11749652c732SAl Viro * Hadlink support got added later to the .u extension. 11759652c732SAl Viro * So there can be a server out there that doesn't 11769652c732SAl Viro * support this even with .u extension. That would 11779652c732SAl Viro * just leave us with stat->extension being an empty 11789652c732SAl Viro * string, though. 11795717144aSAneesh Kumar K.V */ 11805717144aSAneesh Kumar K.V /* HARDLINKCOUNT %u */ 11819652c732SAl Viro if (sscanf(stat->extension, 11829652c732SAl Viro " HARDLINKCOUNT %u", &i_nlink) == 1) 1183bfe86848SMiklos Szeredi set_nlink(inode, i_nlink); 11845717144aSAneesh Kumar K.V } 11855717144aSAneesh Kumar K.V } 1186df345c67SAneesh Kumar K.V mode = p9mode2perm(v9ses, stat); 118745089142SAneesh Kumar K.V mode |= inode->i_mode & ~S_IALLUGO; 118845089142SAneesh Kumar K.V inode->i_mode = mode; 11892bad8471SEric Van Hensbergen 11905e3cc1eeSHou Tao if (!(flags & V9FS_STAT2INODE_KEEP_ISIZE)) 11915e3cc1eeSHou Tao v9fs_i_size_write(inode, stat->length); 1192bd238fb4SLatchesar Ionkov /* not real number of blocks, but 512 byte ones ... */ 11935e3cc1eeSHou Tao inode->i_blocks = (stat->length + 512 - 1) >> 9; 1194b3cbea03SAneesh Kumar K.V v9inode->cache_validity &= ~V9FS_INO_INVALID_ATTR; 11952bad8471SEric Van Hensbergen } 11962bad8471SEric Van Hensbergen 11972bad8471SEric Van Hensbergen /** 11982bad8471SEric Van Hensbergen * v9fs_qid2ino - convert qid into inode number 11992bad8471SEric Van Hensbergen * @qid: qid to hash 12002bad8471SEric Van Hensbergen * 12012bad8471SEric Van Hensbergen * BUG: potential for inode number collisions? 12022bad8471SEric Van Hensbergen */ 12032bad8471SEric Van Hensbergen 1204bd238fb4SLatchesar Ionkov ino_t v9fs_qid2ino(struct p9_qid *qid) 12052bad8471SEric Van Hensbergen { 12062bad8471SEric Van Hensbergen u64 path = qid->path + 2; 12072bad8471SEric Van Hensbergen ino_t i = 0; 12082bad8471SEric Van Hensbergen 12092bad8471SEric Van Hensbergen if (sizeof(ino_t) == sizeof(path)) 12102bad8471SEric Van Hensbergen memcpy(&i, &path, sizeof(ino_t)); 12112bad8471SEric Van Hensbergen else 12122bad8471SEric Van Hensbergen i = (ino_t) (path ^ (path >> 32)); 12132bad8471SEric Van Hensbergen 12142bad8471SEric Van Hensbergen return i; 12152bad8471SEric Van Hensbergen } 12162bad8471SEric Van Hensbergen 12172bad8471SEric Van Hensbergen /** 12186b255391SAl Viro * v9fs_vfs_get_link - follow a symlink path 12192bad8471SEric Van Hensbergen * @dentry: dentry for symlink 12206b255391SAl Viro * @inode: inode for symlink 1221fceef393SAl Viro * @done: delayed call for when we are done with the return value 12222bad8471SEric Van Hensbergen */ 12232bad8471SEric Van Hensbergen 12246b255391SAl Viro static const char *v9fs_vfs_get_link(struct dentry *dentry, 1225fceef393SAl Viro struct inode *inode, 1226fceef393SAl Viro struct delayed_call *done) 12272bad8471SEric Van Hensbergen { 12286b255391SAl Viro struct v9fs_session_info *v9ses; 12296b255391SAl Viro struct p9_fid *fid; 123090e4fc88SAl Viro struct p9_wstat *st; 1231680baacbSAl Viro char *res; 12322bad8471SEric Van Hensbergen 12336b255391SAl Viro if (!dentry) 12346b255391SAl Viro return ERR_PTR(-ECHILD); 12356b255391SAl Viro 12366b255391SAl Viro v9ses = v9fs_dentry2v9ses(dentry); 1237e5690f26SDominique Martinet if (!v9fs_proto_dotu(v9ses)) 1238e5690f26SDominique Martinet return ERR_PTR(-EBADF); 1239e5690f26SDominique Martinet 12404b8e9923SAl Viro p9_debug(P9_DEBUG_VFS, "%pd\n", dentry); 1241e5690f26SDominique Martinet fid = v9fs_fid_lookup(dentry); 12422bad8471SEric Van Hensbergen 124390e4fc88SAl Viro if (IS_ERR(fid)) 124490e4fc88SAl Viro return ERR_CAST(fid); 12452bad8471SEric Van Hensbergen 124690e4fc88SAl Viro st = p9_client_stat(fid); 1247b48dbb99SDominique Martinet p9_fid_put(fid); 124890e4fc88SAl Viro if (IS_ERR(st)) 124990e4fc88SAl Viro return ERR_CAST(st); 125090e4fc88SAl Viro 125190e4fc88SAl Viro if (!(st->mode & P9_DMSYMLINK)) { 125290e4fc88SAl Viro p9stat_free(st); 125390e4fc88SAl Viro kfree(st); 125490e4fc88SAl Viro return ERR_PTR(-EINVAL); 12552bad8471SEric Van Hensbergen } 1256680baacbSAl Viro res = st->extension; 125790e4fc88SAl Viro st->extension = NULL; 1258680baacbSAl Viro if (strlen(res) >= PATH_MAX) 1259680baacbSAl Viro res[PATH_MAX - 1] = '\0'; 1260680baacbSAl Viro 126190e4fc88SAl Viro p9stat_free(st); 126290e4fc88SAl Viro kfree(st); 1263fceef393SAl Viro set_delayed_call(done, kfree_link, res); 1264fceef393SAl Viro return res; 12652bad8471SEric Van Hensbergen } 12662bad8471SEric Van Hensbergen 12672bad8471SEric Van Hensbergen /** 1268ee443996SEric Van Hensbergen * v9fs_vfs_mkspecial - create a special file 1269ee443996SEric Van Hensbergen * @dir: inode to create special file in 1270ee443996SEric Van Hensbergen * @dentry: dentry to create 1271fd2916bdSFabian Frederick * @perm: mode to create special file 1272ee443996SEric Van Hensbergen * @extension: 9p2000.u format extension string representing special file 1273ee443996SEric Van Hensbergen * 1274ee443996SEric Van Hensbergen */ 1275ee443996SEric Van Hensbergen 1276531b1094SLatchesar Ionkov static int v9fs_vfs_mkspecial(struct inode *dir, struct dentry *dentry, 1277c2837de7SAl Viro u32 perm, const char *extension) 1278531b1094SLatchesar Ionkov { 1279bd238fb4SLatchesar Ionkov struct p9_fid *fid; 1280d28c61f0SAneesh Kumar K.V struct v9fs_session_info *v9ses; 1281531b1094SLatchesar Ionkov 12826a3124a3SLatchesar Ionkov v9ses = v9fs_inode2v9ses(dir); 1283dd6102fbSSripathi Kodi if (!v9fs_proto_dotu(v9ses)) { 12845d385153SJoe Perches p9_debug(P9_DEBUG_ERROR, "not extended\n"); 12856a3124a3SLatchesar Ionkov return -EPERM; 1286531b1094SLatchesar Ionkov } 1287531b1094SLatchesar Ionkov 1288bd238fb4SLatchesar Ionkov fid = v9fs_create(v9ses, dir, dentry, (char *) extension, perm, 1289bd238fb4SLatchesar Ionkov P9_OREAD); 1290bd238fb4SLatchesar Ionkov if (IS_ERR(fid)) 1291bd238fb4SLatchesar Ionkov return PTR_ERR(fid); 1292da977b2cSEric Van Hensbergen 1293d28c61f0SAneesh Kumar K.V v9fs_invalidate_inode_attr(dir); 1294b48dbb99SDominique Martinet p9_fid_put(fid); 12956a3124a3SLatchesar Ionkov return 0; 1296531b1094SLatchesar Ionkov } 1297531b1094SLatchesar Ionkov 1298531b1094SLatchesar Ionkov /** 1299531b1094SLatchesar Ionkov * v9fs_vfs_symlink - helper function to create symlinks 13007a77db95SChristian Brauner * @idmap: idmap of the mount 1301531b1094SLatchesar Ionkov * @dir: directory inode containing symlink 1302531b1094SLatchesar Ionkov * @dentry: dentry for symlink 1303531b1094SLatchesar Ionkov * @symname: symlink data 1304531b1094SLatchesar Ionkov * 1305ee443996SEric Van Hensbergen * See Also: 9P2000.u RFC for more information 1306531b1094SLatchesar Ionkov * 1307531b1094SLatchesar Ionkov */ 1308531b1094SLatchesar Ionkov 1309531b1094SLatchesar Ionkov static int 13107a77db95SChristian Brauner v9fs_vfs_symlink(struct mnt_idmap *idmap, struct inode *dir, 1311549c7297SChristian Brauner struct dentry *dentry, const char *symname) 1312531b1094SLatchesar Ionkov { 13134b8e9923SAl Viro p9_debug(P9_DEBUG_VFS, " %lu,%pd,%s\n", 13144b8e9923SAl Viro dir->i_ino, dentry, symname); 1315531b1094SLatchesar Ionkov 1316c2837de7SAl Viro return v9fs_vfs_mkspecial(dir, dentry, P9_DMSYMLINK, symname); 1317531b1094SLatchesar Ionkov } 1318531b1094SLatchesar Ionkov 1319b46c267eSAl Viro #define U32_MAX_DIGITS 10 1320b46c267eSAl Viro 13212bad8471SEric Van Hensbergen /** 13222bad8471SEric Van Hensbergen * v9fs_vfs_link - create a hardlink 13232bad8471SEric Van Hensbergen * @old_dentry: dentry for file to link to 13242bad8471SEric Van Hensbergen * @dir: inode destination for new link 132573c592b9SEric Van Hensbergen * @dentry: dentry for link 13262bad8471SEric Van Hensbergen * 13272bad8471SEric Van Hensbergen */ 13282bad8471SEric Van Hensbergen 13292bad8471SEric Van Hensbergen static int 13302bad8471SEric Van Hensbergen v9fs_vfs_link(struct dentry *old_dentry, struct inode *dir, 13312bad8471SEric Van Hensbergen struct dentry *dentry) 13322bad8471SEric Van Hensbergen { 1333531b1094SLatchesar Ionkov int retval; 1334b46c267eSAl Viro char name[1 + U32_MAX_DIGITS + 2]; /* sign + number + \n + \0 */ 1335d28c61f0SAneesh Kumar K.V struct p9_fid *oldfid; 13362bad8471SEric Van Hensbergen 13374b8e9923SAl Viro p9_debug(P9_DEBUG_VFS, " %lu,%pd,%pd\n", 13384b8e9923SAl Viro dir->i_ino, dentry, old_dentry); 13392bad8471SEric Van Hensbergen 1340da977b2cSEric Van Hensbergen oldfid = v9fs_fid_clone(old_dentry); 1341da977b2cSEric Van Hensbergen if (IS_ERR(oldfid)) 1342da977b2cSEric Van Hensbergen return PTR_ERR(oldfid); 13432bad8471SEric Van Hensbergen 134416cce6d2SLatchesar Ionkov sprintf(name, "%d\n", oldfid->fid); 1345bd238fb4SLatchesar Ionkov retval = v9fs_vfs_mkspecial(dir, dentry, P9_DMLINK, name); 1346c06c066aSAneesh Kumar K.V if (!retval) { 13472b0143b5SDavid Howells v9fs_refresh_inode(oldfid, d_inode(old_dentry)); 1348d28c61f0SAneesh Kumar K.V v9fs_invalidate_inode_attr(dir); 1349c06c066aSAneesh Kumar K.V } 1350b48dbb99SDominique Martinet p9_fid_put(oldfid); 13512bad8471SEric Van Hensbergen return retval; 13522bad8471SEric Van Hensbergen } 13532bad8471SEric Van Hensbergen 13542bad8471SEric Van Hensbergen /** 13552bad8471SEric Van Hensbergen * v9fs_vfs_mknod - create a special file 13565ebb29beSChristian Brauner * @idmap: idmap of the mount 13572bad8471SEric Van Hensbergen * @dir: inode destination for new link 13582bad8471SEric Van Hensbergen * @dentry: dentry for file 13592bad8471SEric Van Hensbergen * @mode: mode for creation 1360ee443996SEric Van Hensbergen * @rdev: device associated with special file 13612bad8471SEric Van Hensbergen * 13622bad8471SEric Van Hensbergen */ 13632bad8471SEric Van Hensbergen 13642bad8471SEric Van Hensbergen static int 13655ebb29beSChristian Brauner v9fs_vfs_mknod(struct mnt_idmap *idmap, struct inode *dir, 1366549c7297SChristian Brauner struct dentry *dentry, umode_t mode, dev_t rdev) 13672bad8471SEric Van Hensbergen { 1368c2837de7SAl Viro struct v9fs_session_info *v9ses = v9fs_inode2v9ses(dir); 1369531b1094SLatchesar Ionkov int retval; 1370b46c267eSAl Viro char name[2 + U32_MAX_DIGITS + 1 + U32_MAX_DIGITS + 1]; 1371c2837de7SAl Viro u32 perm; 13722bad8471SEric Van Hensbergen 13736e195b0fSDominique Martinet p9_debug(P9_DEBUG_VFS, " %lu,%pd mode: %x MAJOR: %u MINOR: %u\n", 13744b8e9923SAl Viro dir->i_ino, dentry, mode, 13755d385153SJoe Perches MAJOR(rdev), MINOR(rdev)); 13762bad8471SEric Van Hensbergen 13772bad8471SEric Van Hensbergen /* build extension */ 13782bad8471SEric Van Hensbergen if (S_ISBLK(mode)) 1379531b1094SLatchesar Ionkov sprintf(name, "b %u %u", MAJOR(rdev), MINOR(rdev)); 13802bad8471SEric Van Hensbergen else if (S_ISCHR(mode)) 1381531b1094SLatchesar Ionkov sprintf(name, "c %u %u", MAJOR(rdev), MINOR(rdev)); 1382b46c267eSAl Viro else 1383531b1094SLatchesar Ionkov *name = 0; 13842bad8471SEric Van Hensbergen 1385c2837de7SAl Viro perm = unixmode2p9mode(v9ses, mode); 1386c2837de7SAl Viro retval = v9fs_vfs_mkspecial(dir, dentry, perm, name); 13872bad8471SEric Van Hensbergen 13882bad8471SEric Van Hensbergen return retval; 13892bad8471SEric Van Hensbergen } 13902bad8471SEric Van Hensbergen 1391b3cbea03SAneesh Kumar K.V int v9fs_refresh_inode(struct p9_fid *fid, struct inode *inode) 1392b3cbea03SAneesh Kumar K.V { 139345089142SAneesh Kumar K.V int umode; 139445089142SAneesh Kumar K.V dev_t rdev; 1395b3cbea03SAneesh Kumar K.V struct p9_wstat *st; 1396b3cbea03SAneesh Kumar K.V struct v9fs_session_info *v9ses; 13975e3cc1eeSHou Tao unsigned int flags; 1398b3cbea03SAneesh Kumar K.V 1399b3cbea03SAneesh Kumar K.V v9ses = v9fs_inode2v9ses(inode); 1400b3cbea03SAneesh Kumar K.V st = p9_client_stat(fid); 1401b3cbea03SAneesh Kumar K.V if (IS_ERR(st)) 1402b3cbea03SAneesh Kumar K.V return PTR_ERR(st); 140345089142SAneesh Kumar K.V /* 140445089142SAneesh Kumar K.V * Don't update inode if the file type is different 140545089142SAneesh Kumar K.V */ 140645089142SAneesh Kumar K.V umode = p9mode2unixmode(v9ses, st, &rdev); 14076e3e2c43SAl Viro if (inode_wrong_type(inode, umode)) 140845089142SAneesh Kumar K.V goto out; 1409b3cbea03SAneesh Kumar K.V 1410b3cbea03SAneesh Kumar K.V /* 1411b3cbea03SAneesh Kumar K.V * We don't want to refresh inode->i_size, 1412b3cbea03SAneesh Kumar K.V * because we may have cached data 1413b3cbea03SAneesh Kumar K.V */ 14144eb31178SEric Van Hensbergen flags = (v9ses->cache & CACHE_LOOSE) ? 14155e3cc1eeSHou Tao V9FS_STAT2INODE_KEEP_ISIZE : 0; 14165e3cc1eeSHou Tao v9fs_stat2inode(st, inode, inode->i_sb, flags); 141745089142SAneesh Kumar K.V out: 1418b3cbea03SAneesh Kumar K.V p9stat_free(st); 1419b3cbea03SAneesh Kumar K.V kfree(st); 1420b3cbea03SAneesh Kumar K.V return 0; 1421b3cbea03SAneesh Kumar K.V } 1422b3cbea03SAneesh Kumar K.V 14239b6533c9SSripathi Kodi static const struct inode_operations v9fs_dir_inode_operations_dotu = { 14249b6533c9SSripathi Kodi .create = v9fs_vfs_create, 14259b6533c9SSripathi Kodi .lookup = v9fs_vfs_lookup, 1426e43ae79cSMiklos Szeredi .atomic_open = v9fs_vfs_atomic_open, 14279b6533c9SSripathi Kodi .symlink = v9fs_vfs_symlink, 142850cc42ffSVenkateswararao Jujjuri (JV) .link = v9fs_vfs_link, 14299b6533c9SSripathi Kodi .unlink = v9fs_vfs_unlink, 14309b6533c9SSripathi Kodi .mkdir = v9fs_vfs_mkdir, 14319b6533c9SSripathi Kodi .rmdir = v9fs_vfs_rmdir, 14321d76e313SAneesh Kumar K.V .mknod = v9fs_vfs_mknod, 14339b6533c9SSripathi Kodi .rename = v9fs_vfs_rename, 14349b6533c9SSripathi Kodi .getattr = v9fs_vfs_getattr, 14359b6533c9SSripathi Kodi .setattr = v9fs_vfs_setattr, 14369b6533c9SSripathi Kodi }; 14379b6533c9SSripathi Kodi 1438754661f1SArjan van de Ven static const struct inode_operations v9fs_dir_inode_operations = { 1439b501611aSEric Van Hensbergen .create = v9fs_vfs_create, 1440b501611aSEric Van Hensbergen .lookup = v9fs_vfs_lookup, 1441e43ae79cSMiklos Szeredi .atomic_open = v9fs_vfs_atomic_open, 1442b501611aSEric Van Hensbergen .unlink = v9fs_vfs_unlink, 1443b501611aSEric Van Hensbergen .mkdir = v9fs_vfs_mkdir, 1444b501611aSEric Van Hensbergen .rmdir = v9fs_vfs_rmdir, 1445b501611aSEric Van Hensbergen .mknod = v9fs_vfs_mknod, 1446b501611aSEric Van Hensbergen .rename = v9fs_vfs_rename, 1447b501611aSEric Van Hensbergen .getattr = v9fs_vfs_getattr, 1448b501611aSEric Van Hensbergen .setattr = v9fs_vfs_setattr, 1449b501611aSEric Van Hensbergen }; 1450b501611aSEric Van Hensbergen 1451754661f1SArjan van de Ven static const struct inode_operations v9fs_file_inode_operations = { 14522bad8471SEric Van Hensbergen .getattr = v9fs_vfs_getattr, 14532bad8471SEric Van Hensbergen .setattr = v9fs_vfs_setattr, 14542bad8471SEric Van Hensbergen }; 14552bad8471SEric Van Hensbergen 1456754661f1SArjan van de Ven static const struct inode_operations v9fs_symlink_inode_operations = { 14576b255391SAl Viro .get_link = v9fs_vfs_get_link, 14582bad8471SEric Van Hensbergen .getattr = v9fs_vfs_getattr, 14592bad8471SEric Van Hensbergen .setattr = v9fs_vfs_setattr, 14602bad8471SEric Van Hensbergen }; 14619b6533c9SSripathi Kodi 1462