12bad8471SEric Van Hensbergen /* 22bad8471SEric Van Hensbergen * linux/fs/9p/vfs_inode.c 32bad8471SEric Van Hensbergen * 473c592b9SEric Van Hensbergen * This file contains vfs inode ops for the 9P2000 protocol. 52bad8471SEric Van Hensbergen * 62bad8471SEric Van Hensbergen * Copyright (C) 2004 by Eric Van Hensbergen <ericvh@gmail.com> 72bad8471SEric Van Hensbergen * Copyright (C) 2002 by Ron Minnich <rminnich@lanl.gov> 82bad8471SEric Van Hensbergen * 92bad8471SEric Van Hensbergen * This program is free software; you can redistribute it and/or modify 1042e8c509SEric Van Hensbergen * it under the terms of the GNU General Public License version 2 1142e8c509SEric Van Hensbergen * as published by the Free Software Foundation. 122bad8471SEric Van Hensbergen * 132bad8471SEric Van Hensbergen * This program is distributed in the hope that it will be useful, 142bad8471SEric Van Hensbergen * but WITHOUT ANY WARRANTY; without even the implied warranty of 152bad8471SEric Van Hensbergen * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 162bad8471SEric Van Hensbergen * GNU General Public License for more details. 172bad8471SEric Van Hensbergen * 182bad8471SEric Van Hensbergen * You should have received a copy of the GNU General Public License 192bad8471SEric Van Hensbergen * along with this program; if not, write to: 202bad8471SEric Van Hensbergen * Free Software Foundation 212bad8471SEric Van Hensbergen * 51 Franklin Street, Fifth Floor 222bad8471SEric Van Hensbergen * Boston, MA 02111-1301 USA 232bad8471SEric Van Hensbergen * 242bad8471SEric Van Hensbergen */ 252bad8471SEric Van Hensbergen 265d385153SJoe Perches #define pr_fmt(fmt) KBUILD_MODNAME ": " fmt 275d385153SJoe Perches 282bad8471SEric Van Hensbergen #include <linux/module.h> 292bad8471SEric Van Hensbergen #include <linux/errno.h> 302bad8471SEric Van Hensbergen #include <linux/fs.h> 312bad8471SEric Van Hensbergen #include <linux/file.h> 322bad8471SEric Van Hensbergen #include <linux/pagemap.h> 332bad8471SEric Van Hensbergen #include <linux/stat.h> 342bad8471SEric Van Hensbergen #include <linux/string.h> 352bad8471SEric Van Hensbergen #include <linux/inet.h> 362bad8471SEric Van Hensbergen #include <linux/namei.h> 372bad8471SEric Van Hensbergen #include <linux/idr.h> 38e8edc6e0SAlexey Dobriyan #include <linux/sched.h> 395a0e3ad6STejun Heo #include <linux/slab.h> 40ebf46264SAneesh Kumar K.V #include <linux/xattr.h> 4185ff872dSAneesh Kumar K.V #include <linux/posix_acl.h> 42bd238fb4SLatchesar Ionkov #include <net/9p/9p.h> 43bd238fb4SLatchesar Ionkov #include <net/9p/client.h> 442bad8471SEric Van Hensbergen 452bad8471SEric Van Hensbergen #include "v9fs.h" 462bad8471SEric Van Hensbergen #include "v9fs_vfs.h" 472bad8471SEric Van Hensbergen #include "fid.h" 4860e78d2cSAbhishek Kulkarni #include "cache.h" 49ebf46264SAneesh Kumar K.V #include "xattr.h" 5085ff872dSAneesh Kumar K.V #include "acl.h" 512bad8471SEric Van Hensbergen 52754661f1SArjan van de Ven static const struct inode_operations v9fs_dir_inode_operations; 539b6533c9SSripathi Kodi static const struct inode_operations v9fs_dir_inode_operations_dotu; 54754661f1SArjan van de Ven static const struct inode_operations v9fs_file_inode_operations; 55754661f1SArjan van de Ven static const struct inode_operations v9fs_symlink_inode_operations; 56f5fc6145SAneesh Kumar K.V 572bad8471SEric Van Hensbergen /** 582bad8471SEric Van Hensbergen * unixmode2p9mode - convert unix mode bits to plan 9 592bad8471SEric Van Hensbergen * @v9ses: v9fs session information 602bad8471SEric Van Hensbergen * @mode: mode to convert 612bad8471SEric Van Hensbergen * 622bad8471SEric Van Hensbergen */ 632bad8471SEric Van Hensbergen 643eda0de6SAl Viro static u32 unixmode2p9mode(struct v9fs_session_info *v9ses, umode_t mode) 652bad8471SEric Van Hensbergen { 662bad8471SEric Van Hensbergen int res; 672bad8471SEric Van Hensbergen res = mode & 0777; 682bad8471SEric Van Hensbergen if (S_ISDIR(mode)) 69bd238fb4SLatchesar Ionkov res |= P9_DMDIR; 70dd6102fbSSripathi Kodi if (v9fs_proto_dotu(v9ses)) { 712bad8471SEric Van Hensbergen if (v9ses->nodev == 0) { 722bad8471SEric Van Hensbergen if (S_ISSOCK(mode)) 73bd238fb4SLatchesar Ionkov res |= P9_DMSOCKET; 742bad8471SEric Van Hensbergen if (S_ISFIFO(mode)) 75bd238fb4SLatchesar Ionkov res |= P9_DMNAMEDPIPE; 762bad8471SEric Van Hensbergen if (S_ISBLK(mode)) 77bd238fb4SLatchesar Ionkov res |= P9_DMDEVICE; 782bad8471SEric Van Hensbergen if (S_ISCHR(mode)) 79bd238fb4SLatchesar Ionkov res |= P9_DMDEVICE; 802bad8471SEric Van Hensbergen } 812bad8471SEric Van Hensbergen 822bad8471SEric Van Hensbergen if ((mode & S_ISUID) == S_ISUID) 83bd238fb4SLatchesar Ionkov res |= P9_DMSETUID; 842bad8471SEric Van Hensbergen if ((mode & S_ISGID) == S_ISGID) 85bd238fb4SLatchesar Ionkov res |= P9_DMSETGID; 86d199d652SAnthony Liguori if ((mode & S_ISVTX) == S_ISVTX) 87d199d652SAnthony Liguori res |= P9_DMSETVTX; 882bad8471SEric Van Hensbergen } 892bad8471SEric Van Hensbergen return res; 902bad8471SEric Van Hensbergen } 912bad8471SEric Van Hensbergen 922bad8471SEric Van Hensbergen /** 93df345c67SAneesh Kumar K.V * p9mode2perm- convert plan9 mode bits to unix permission bits 94df345c67SAneesh Kumar K.V * @v9ses: v9fs session information 95df345c67SAneesh Kumar K.V * @stat: p9_wstat from which mode need to be derived 96df345c67SAneesh Kumar K.V * 97df345c67SAneesh Kumar K.V */ 98df345c67SAneesh Kumar K.V static int p9mode2perm(struct v9fs_session_info *v9ses, 99df345c67SAneesh Kumar K.V struct p9_wstat *stat) 100df345c67SAneesh Kumar K.V { 101df345c67SAneesh Kumar K.V int res; 102df345c67SAneesh Kumar K.V int mode = stat->mode; 103df345c67SAneesh Kumar K.V 104df345c67SAneesh Kumar K.V res = mode & S_IALLUGO; 105df345c67SAneesh Kumar K.V if (v9fs_proto_dotu(v9ses)) { 106df345c67SAneesh Kumar K.V if ((mode & P9_DMSETUID) == P9_DMSETUID) 107df345c67SAneesh Kumar K.V res |= S_ISUID; 108df345c67SAneesh Kumar K.V 109df345c67SAneesh Kumar K.V if ((mode & P9_DMSETGID) == P9_DMSETGID) 110df345c67SAneesh Kumar K.V res |= S_ISGID; 111df345c67SAneesh Kumar K.V 112df345c67SAneesh Kumar K.V if ((mode & P9_DMSETVTX) == P9_DMSETVTX) 113df345c67SAneesh Kumar K.V res |= S_ISVTX; 114df345c67SAneesh Kumar K.V } 115df345c67SAneesh Kumar K.V return res; 116df345c67SAneesh Kumar K.V } 117df345c67SAneesh Kumar K.V 118df345c67SAneesh Kumar K.V /** 1192bad8471SEric Van Hensbergen * p9mode2unixmode- convert plan9 mode bits to unix mode bits 1202bad8471SEric Van Hensbergen * @v9ses: v9fs session information 12145089142SAneesh Kumar K.V * @stat: p9_wstat from which mode need to be derived 12245089142SAneesh Kumar K.V * @rdev: major number, minor number in case of device files. 1232bad8471SEric Van Hensbergen * 1242bad8471SEric Van Hensbergen */ 1253eda0de6SAl Viro static umode_t p9mode2unixmode(struct v9fs_session_info *v9ses, 12645089142SAneesh Kumar K.V struct p9_wstat *stat, dev_t *rdev) 1272bad8471SEric Van Hensbergen { 1282bad8471SEric Van Hensbergen int res; 1293eda0de6SAl Viro u32 mode = stat->mode; 1302bad8471SEric Van Hensbergen 13145089142SAneesh Kumar K.V *rdev = 0; 132df345c67SAneesh Kumar K.V res = p9mode2perm(v9ses, stat); 1332bad8471SEric Van Hensbergen 134bd238fb4SLatchesar Ionkov if ((mode & P9_DMDIR) == P9_DMDIR) 1352bad8471SEric Van Hensbergen res |= S_IFDIR; 136dd6102fbSSripathi Kodi else if ((mode & P9_DMSYMLINK) && (v9fs_proto_dotu(v9ses))) 1372bad8471SEric Van Hensbergen res |= S_IFLNK; 138dd6102fbSSripathi Kodi else if ((mode & P9_DMSOCKET) && (v9fs_proto_dotu(v9ses)) 1392bad8471SEric Van Hensbergen && (v9ses->nodev == 0)) 1402bad8471SEric Van Hensbergen res |= S_IFSOCK; 141dd6102fbSSripathi Kodi else if ((mode & P9_DMNAMEDPIPE) && (v9fs_proto_dotu(v9ses)) 1422bad8471SEric Van Hensbergen && (v9ses->nodev == 0)) 1432bad8471SEric Van Hensbergen res |= S_IFIFO; 144dd6102fbSSripathi Kodi else if ((mode & P9_DMDEVICE) && (v9fs_proto_dotu(v9ses)) 14545089142SAneesh Kumar K.V && (v9ses->nodev == 0)) { 14645089142SAneesh Kumar K.V char type = 0, ext[32]; 14745089142SAneesh Kumar K.V int major = -1, minor = -1; 14845089142SAneesh Kumar K.V 149b3f8ab4bSChen Gang strlcpy(ext, stat->extension, sizeof(ext)); 150afe604d0SToralf Förster sscanf(ext, "%c %i %i", &type, &major, &minor); 15145089142SAneesh Kumar K.V switch (type) { 15245089142SAneesh Kumar K.V case 'c': 15345089142SAneesh Kumar K.V res |= S_IFCHR; 15445089142SAneesh Kumar K.V break; 15545089142SAneesh Kumar K.V case 'b': 1562bad8471SEric Van Hensbergen res |= S_IFBLK; 15745089142SAneesh Kumar K.V break; 15845089142SAneesh Kumar K.V default: 1595d385153SJoe Perches p9_debug(P9_DEBUG_ERROR, "Unknown special type %c %s\n", 1605d385153SJoe Perches type, stat->extension); 16145089142SAneesh Kumar K.V }; 16245089142SAneesh Kumar K.V *rdev = MKDEV(major, minor); 16345089142SAneesh Kumar K.V } else 1642bad8471SEric Van Hensbergen res |= S_IFREG; 1652bad8471SEric Van Hensbergen 1662bad8471SEric Van Hensbergen return res; 1672bad8471SEric Van Hensbergen } 1682bad8471SEric Van Hensbergen 169ee443996SEric Van Hensbergen /** 170ee443996SEric Van Hensbergen * v9fs_uflags2omode- convert posix open flags to plan 9 mode bits 171ee443996SEric Van Hensbergen * @uflags: flags to convert 1722e4bef41SEric Van Hensbergen * @extended: if .u extensions are active 173ee443996SEric Van Hensbergen */ 174ee443996SEric Van Hensbergen 1752e4bef41SEric Van Hensbergen int v9fs_uflags2omode(int uflags, int extended) 1766a3124a3SLatchesar Ionkov { 1776a3124a3SLatchesar Ionkov int ret; 1786a3124a3SLatchesar Ionkov 1796a3124a3SLatchesar Ionkov ret = 0; 1806a3124a3SLatchesar Ionkov switch (uflags&3) { 1816a3124a3SLatchesar Ionkov default: 1826a3124a3SLatchesar Ionkov case O_RDONLY: 183bd238fb4SLatchesar Ionkov ret = P9_OREAD; 1846a3124a3SLatchesar Ionkov break; 1856a3124a3SLatchesar Ionkov 1866a3124a3SLatchesar Ionkov case O_WRONLY: 187bd238fb4SLatchesar Ionkov ret = P9_OWRITE; 1886a3124a3SLatchesar Ionkov break; 1896a3124a3SLatchesar Ionkov 1906a3124a3SLatchesar Ionkov case O_RDWR: 191bd238fb4SLatchesar Ionkov ret = P9_ORDWR; 1926a3124a3SLatchesar Ionkov break; 1936a3124a3SLatchesar Ionkov } 1946a3124a3SLatchesar Ionkov 1952e4bef41SEric Van Hensbergen if (extended) { 1962e4bef41SEric Van Hensbergen if (uflags & O_EXCL) 1972e4bef41SEric Van Hensbergen ret |= P9_OEXCL; 1982e4bef41SEric Van Hensbergen 1996a3124a3SLatchesar Ionkov if (uflags & O_APPEND) 200bd238fb4SLatchesar Ionkov ret |= P9_OAPPEND; 2012e4bef41SEric Van Hensbergen } 2026a3124a3SLatchesar Ionkov 2036a3124a3SLatchesar Ionkov return ret; 2046a3124a3SLatchesar Ionkov } 2056a3124a3SLatchesar Ionkov 2062bad8471SEric Van Hensbergen /** 207531b1094SLatchesar Ionkov * v9fs_blank_wstat - helper function to setup a 9P stat structure 208531b1094SLatchesar Ionkov * @wstat: structure to initialize 2092bad8471SEric Van Hensbergen * 2102bad8471SEric Van Hensbergen */ 2112bad8471SEric Van Hensbergen 2127a4439c4SM. Mohan Kumar void 213bd238fb4SLatchesar Ionkov v9fs_blank_wstat(struct p9_wstat *wstat) 2142bad8471SEric Van Hensbergen { 215531b1094SLatchesar Ionkov wstat->type = ~0; 216531b1094SLatchesar Ionkov wstat->dev = ~0; 217531b1094SLatchesar Ionkov wstat->qid.type = ~0; 218531b1094SLatchesar Ionkov wstat->qid.version = ~0; 219531b1094SLatchesar Ionkov *((long long *)&wstat->qid.path) = ~0; 220531b1094SLatchesar Ionkov wstat->mode = ~0; 221531b1094SLatchesar Ionkov wstat->atime = ~0; 222531b1094SLatchesar Ionkov wstat->mtime = ~0; 223531b1094SLatchesar Ionkov wstat->length = ~0; 224531b1094SLatchesar Ionkov wstat->name = NULL; 225531b1094SLatchesar Ionkov wstat->uid = NULL; 226531b1094SLatchesar Ionkov wstat->gid = NULL; 227531b1094SLatchesar Ionkov wstat->muid = NULL; 228447c5094SEric W. Biederman wstat->n_uid = INVALID_UID; 229447c5094SEric W. Biederman wstat->n_gid = INVALID_GID; 230447c5094SEric W. Biederman wstat->n_muid = INVALID_UID; 231531b1094SLatchesar Ionkov wstat->extension = NULL; 2322bad8471SEric Van Hensbergen } 2332bad8471SEric Van Hensbergen 23460e78d2cSAbhishek Kulkarni /** 23560e78d2cSAbhishek Kulkarni * v9fs_alloc_inode - helper function to allocate an inode 23660e78d2cSAbhishek Kulkarni * 23760e78d2cSAbhishek Kulkarni */ 23860e78d2cSAbhishek Kulkarni struct inode *v9fs_alloc_inode(struct super_block *sb) 23960e78d2cSAbhishek Kulkarni { 240a78ce05dSAneesh Kumar K.V struct v9fs_inode *v9inode; 241a78ce05dSAneesh Kumar K.V v9inode = (struct v9fs_inode *)kmem_cache_alloc(v9fs_inode_cache, 24260e78d2cSAbhishek Kulkarni GFP_KERNEL); 243a78ce05dSAneesh Kumar K.V if (!v9inode) 24460e78d2cSAbhishek Kulkarni return NULL; 245a78ce05dSAneesh Kumar K.V #ifdef CONFIG_9P_FSCACHE 246a78ce05dSAneesh Kumar K.V v9inode->fscache = NULL; 247a78ce05dSAneesh Kumar K.V spin_lock_init(&v9inode->fscache_lock); 248a78ce05dSAneesh Kumar K.V #endif 2496b39f6d2SAneesh Kumar K.V v9inode->writeback_fid = NULL; 250b3cbea03SAneesh Kumar K.V v9inode->cache_validity = 0; 2515a7e0a8cSAneesh Kumar K.V mutex_init(&v9inode->v_mutex); 252a78ce05dSAneesh Kumar K.V return &v9inode->vfs_inode; 25360e78d2cSAbhishek Kulkarni } 25460e78d2cSAbhishek Kulkarni 25560e78d2cSAbhishek Kulkarni /** 25660e78d2cSAbhishek Kulkarni * v9fs_destroy_inode - destroy an inode 25760e78d2cSAbhishek Kulkarni * 25860e78d2cSAbhishek Kulkarni */ 25960e78d2cSAbhishek Kulkarni 260fa0d7e3dSNick Piggin static void v9fs_i_callback(struct rcu_head *head) 261fa0d7e3dSNick Piggin { 262fa0d7e3dSNick Piggin struct inode *inode = container_of(head, struct inode, i_rcu); 263a78ce05dSAneesh Kumar K.V kmem_cache_free(v9fs_inode_cache, V9FS_I(inode)); 264fa0d7e3dSNick Piggin } 265fa0d7e3dSNick Piggin 26660e78d2cSAbhishek Kulkarni void v9fs_destroy_inode(struct inode *inode) 26760e78d2cSAbhishek Kulkarni { 268fa0d7e3dSNick Piggin call_rcu(&inode->i_rcu, v9fs_i_callback); 26960e78d2cSAbhishek Kulkarni } 27060e78d2cSAbhishek Kulkarni 2715ffc0cb3SAneesh Kumar K.V int v9fs_init_inode(struct v9fs_session_info *v9ses, 2723eda0de6SAl Viro struct inode *inode, umode_t mode, dev_t rdev) 2732bad8471SEric Van Hensbergen { 2745ffc0cb3SAneesh Kumar K.V int err = 0; 2752bb54115SAbhishek Kulkarni 276217f206dSDmitry Monakhov inode_init_owner(inode, NULL, mode); 2772bad8471SEric Van Hensbergen inode->i_blocks = 0; 27845089142SAneesh Kumar K.V inode->i_rdev = rdev; 2792bad8471SEric Van Hensbergen inode->i_atime = inode->i_mtime = inode->i_ctime = CURRENT_TIME; 280147b31cfSEric Van Hensbergen inode->i_mapping->a_ops = &v9fs_addr_operations; 2812bad8471SEric Van Hensbergen 2822bad8471SEric Van Hensbergen switch (mode & S_IFMT) { 2832bad8471SEric Van Hensbergen case S_IFIFO: 2842bad8471SEric Van Hensbergen case S_IFBLK: 2852bad8471SEric Van Hensbergen case S_IFCHR: 2862bad8471SEric Van Hensbergen case S_IFSOCK: 2874b43516aSM. Mohan Kumar if (v9fs_proto_dotl(v9ses)) { 2884b43516aSM. Mohan Kumar inode->i_op = &v9fs_file_inode_operations_dotl; 2894b43516aSM. Mohan Kumar } else if (v9fs_proto_dotu(v9ses)) { 2904b43516aSM. Mohan Kumar inode->i_op = &v9fs_file_inode_operations; 2914b43516aSM. Mohan Kumar } else { 2925d385153SJoe Perches p9_debug(P9_DEBUG_ERROR, 293bd238fb4SLatchesar Ionkov "special files without extended mode\n"); 2942bb54115SAbhishek Kulkarni err = -EINVAL; 2952bb54115SAbhishek Kulkarni goto error; 296b501611aSEric Van Hensbergen } 2972bb54115SAbhishek Kulkarni init_special_inode(inode, inode->i_mode, inode->i_rdev); 2985d58bec5SEric Van Hensbergen break; 2992bad8471SEric Van Hensbergen case S_IFREG: 3009b6533c9SSripathi Kodi if (v9fs_proto_dotl(v9ses)) { 3019b6533c9SSripathi Kodi inode->i_op = &v9fs_file_inode_operations_dotl; 302fb89b45cSDominique Martinet if (v9ses->cache == CACHE_LOOSE || 303fb89b45cSDominique Martinet v9ses->cache == CACHE_FSCACHE) 30429236f4eSAneesh Kumar K.V inode->i_fop = 30529236f4eSAneesh Kumar K.V &v9fs_cached_file_operations_dotl; 306fb89b45cSDominique Martinet else if (v9ses->cache == CACHE_MMAP) 307fb89b45cSDominique Martinet inode->i_fop = &v9fs_mmap_file_operations_dotl; 30829236f4eSAneesh Kumar K.V else 3099b6533c9SSripathi Kodi inode->i_fop = &v9fs_file_operations_dotl; 3109b6533c9SSripathi Kodi } else { 3112bad8471SEric Van Hensbergen inode->i_op = &v9fs_file_inode_operations; 312fb89b45cSDominique Martinet if (v9ses->cache == CACHE_LOOSE || 313fb89b45cSDominique Martinet v9ses->cache == CACHE_FSCACHE) 314fb89b45cSDominique Martinet inode->i_fop = 315fb89b45cSDominique Martinet &v9fs_cached_file_operations; 316fb89b45cSDominique Martinet else if (v9ses->cache == CACHE_MMAP) 317fb89b45cSDominique Martinet inode->i_fop = &v9fs_mmap_file_operations; 31829236f4eSAneesh Kumar K.V else 3192bad8471SEric Van Hensbergen inode->i_fop = &v9fs_file_operations; 3209b6533c9SSripathi Kodi } 3219b6533c9SSripathi Kodi 3222bad8471SEric Van Hensbergen break; 323b501611aSEric Van Hensbergen case S_IFLNK: 3249b6533c9SSripathi Kodi if (!v9fs_proto_dotu(v9ses) && !v9fs_proto_dotl(v9ses)) { 3255d385153SJoe Perches p9_debug(P9_DEBUG_ERROR, 3265d385153SJoe Perches "extended modes used with legacy protocol\n"); 3272bb54115SAbhishek Kulkarni err = -EINVAL; 3282bb54115SAbhishek Kulkarni goto error; 329b501611aSEric Van Hensbergen } 3309b6533c9SSripathi Kodi 3319b6533c9SSripathi Kodi if (v9fs_proto_dotl(v9ses)) 3329b6533c9SSripathi Kodi inode->i_op = &v9fs_symlink_inode_operations_dotl; 3339b6533c9SSripathi Kodi else 334b501611aSEric Van Hensbergen inode->i_op = &v9fs_symlink_inode_operations; 3359b6533c9SSripathi Kodi 336b501611aSEric Van Hensbergen break; 3372bad8471SEric Van Hensbergen case S_IFDIR: 338d8c76e6fSDave Hansen inc_nlink(inode); 3399b6533c9SSripathi Kodi if (v9fs_proto_dotl(v9ses)) 3409b6533c9SSripathi Kodi inode->i_op = &v9fs_dir_inode_operations_dotl; 3419b6533c9SSripathi Kodi else if (v9fs_proto_dotu(v9ses)) 3429b6533c9SSripathi Kodi inode->i_op = &v9fs_dir_inode_operations_dotu; 343b501611aSEric Van Hensbergen else 3442bad8471SEric Van Hensbergen inode->i_op = &v9fs_dir_inode_operations; 3459b6533c9SSripathi Kodi 3469b6533c9SSripathi Kodi if (v9fs_proto_dotl(v9ses)) 3479b6533c9SSripathi Kodi inode->i_fop = &v9fs_dir_operations_dotl; 3489b6533c9SSripathi Kodi else 3492bad8471SEric Van Hensbergen inode->i_fop = &v9fs_dir_operations; 3509b6533c9SSripathi Kodi 3512bad8471SEric Van Hensbergen break; 3522bad8471SEric Van Hensbergen default: 353609eac1cSLinus Torvalds p9_debug(P9_DEBUG_ERROR, "BAD mode 0x%hx S_IFMT 0x%x\n", 3542bad8471SEric Van Hensbergen mode, mode & S_IFMT); 3552bb54115SAbhishek Kulkarni err = -EINVAL; 3562bb54115SAbhishek Kulkarni goto error; 3572bad8471SEric Van Hensbergen } 3582bb54115SAbhishek Kulkarni error: 3595ffc0cb3SAneesh Kumar K.V return err; 3605ffc0cb3SAneesh Kumar K.V 3615ffc0cb3SAneesh Kumar K.V } 3625ffc0cb3SAneesh Kumar K.V 3635ffc0cb3SAneesh Kumar K.V /** 3645ffc0cb3SAneesh Kumar K.V * v9fs_get_inode - helper function to setup an inode 3655ffc0cb3SAneesh Kumar K.V * @sb: superblock 3665ffc0cb3SAneesh Kumar K.V * @mode: mode to setup inode with 3675ffc0cb3SAneesh Kumar K.V * 3685ffc0cb3SAneesh Kumar K.V */ 3695ffc0cb3SAneesh Kumar K.V 3703eda0de6SAl Viro struct inode *v9fs_get_inode(struct super_block *sb, umode_t mode, dev_t rdev) 3715ffc0cb3SAneesh Kumar K.V { 3725ffc0cb3SAneesh Kumar K.V int err; 3735ffc0cb3SAneesh Kumar K.V struct inode *inode; 3745ffc0cb3SAneesh Kumar K.V struct v9fs_session_info *v9ses = sb->s_fs_info; 3755ffc0cb3SAneesh Kumar K.V 376609eac1cSLinus Torvalds p9_debug(P9_DEBUG_VFS, "super block: %p mode: %ho\n", sb, mode); 3775ffc0cb3SAneesh Kumar K.V 3785ffc0cb3SAneesh Kumar K.V inode = new_inode(sb); 3795ffc0cb3SAneesh Kumar K.V if (!inode) { 3805d385153SJoe Perches pr_warn("%s (%d): Problem allocating inode\n", 3815d385153SJoe Perches __func__, task_pid_nr(current)); 3825ffc0cb3SAneesh Kumar K.V return ERR_PTR(-ENOMEM); 3835ffc0cb3SAneesh Kumar K.V } 38445089142SAneesh Kumar K.V err = v9fs_init_inode(v9ses, inode, mode, rdev); 3855ffc0cb3SAneesh Kumar K.V if (err) { 3862bb54115SAbhishek Kulkarni iput(inode); 3872bb54115SAbhishek Kulkarni return ERR_PTR(err); 3882bad8471SEric Van Hensbergen } 3895ffc0cb3SAneesh Kumar K.V return inode; 3905ffc0cb3SAneesh Kumar K.V } 3912bad8471SEric Van Hensbergen 392bd238fb4SLatchesar Ionkov /* 3936a3124a3SLatchesar Ionkov static struct v9fs_fid* 3946a3124a3SLatchesar Ionkov v9fs_clone_walk(struct v9fs_session_info *v9ses, u32 fid, struct dentry *dentry) 3956a3124a3SLatchesar Ionkov { 3966a3124a3SLatchesar Ionkov int err; 397736c4b85SMika Kukkonen int nfid; 3986a3124a3SLatchesar Ionkov struct v9fs_fid *ret; 3996a3124a3SLatchesar Ionkov struct v9fs_fcall *fcall; 4000b8dd177SLatchesar Ionkov 4016a3124a3SLatchesar Ionkov nfid = v9fs_get_idpool(&v9ses->fidpool); 4026a3124a3SLatchesar Ionkov if (nfid < 0) { 4030b8dd177SLatchesar Ionkov eprintk(KERN_WARNING, "no free fids available\n"); 404731805b4SLatchesar Ionkov return ERR_PTR(-ENOSPC); 4050b8dd177SLatchesar Ionkov } 4060b8dd177SLatchesar Ionkov 4076a3124a3SLatchesar Ionkov err = v9fs_t_walk(v9ses, fid, nfid, (char *) dentry->d_name.name, 4086a3124a3SLatchesar Ionkov &fcall); 4096a3124a3SLatchesar Ionkov 4106a3124a3SLatchesar Ionkov if (err < 0) { 41141e5a6acSLatchesar Ionkov if (fcall && fcall->id == RWALK) 41241e5a6acSLatchesar Ionkov goto clunk_fid; 41341e5a6acSLatchesar Ionkov 4146a3124a3SLatchesar Ionkov PRINT_FCALL_ERROR("walk error", fcall); 4156a3124a3SLatchesar Ionkov v9fs_put_idpool(nfid, &v9ses->fidpool); 4166a3124a3SLatchesar Ionkov goto error; 4170b8dd177SLatchesar Ionkov } 4186a3124a3SLatchesar Ionkov 4193cf6429aSLatchesar Ionkov kfree(fcall); 4203cf6429aSLatchesar Ionkov fcall = NULL; 4216a3124a3SLatchesar Ionkov ret = v9fs_fid_create(v9ses, nfid); 4226a3124a3SLatchesar Ionkov if (!ret) { 4236a3124a3SLatchesar Ionkov err = -ENOMEM; 4246a3124a3SLatchesar Ionkov goto clunk_fid; 4250b8dd177SLatchesar Ionkov } 4262bad8471SEric Van Hensbergen 4276a3124a3SLatchesar Ionkov err = v9fs_fid_insert(ret, dentry); 4286a3124a3SLatchesar Ionkov if (err < 0) { 4296a3124a3SLatchesar Ionkov v9fs_fid_destroy(ret); 4306a3124a3SLatchesar Ionkov goto clunk_fid; 4316a3124a3SLatchesar Ionkov } 4322bad8471SEric Van Hensbergen 4336a3124a3SLatchesar Ionkov return ret; 4346a3124a3SLatchesar Ionkov 4356a3124a3SLatchesar Ionkov clunk_fid: 4366a3124a3SLatchesar Ionkov v9fs_t_clunk(v9ses, nfid); 4376a3124a3SLatchesar Ionkov 4386a3124a3SLatchesar Ionkov error: 4396a3124a3SLatchesar Ionkov kfree(fcall); 4406a3124a3SLatchesar Ionkov return ERR_PTR(err); 4416a3124a3SLatchesar Ionkov } 442bd238fb4SLatchesar Ionkov */ 4436a3124a3SLatchesar Ionkov 44460e78d2cSAbhishek Kulkarni 44560e78d2cSAbhishek Kulkarni /** 44660e78d2cSAbhishek Kulkarni * v9fs_clear_inode - release an inode 44760e78d2cSAbhishek Kulkarni * @inode: inode to release 44860e78d2cSAbhishek Kulkarni * 44960e78d2cSAbhishek Kulkarni */ 450b57922d9SAl Viro void v9fs_evict_inode(struct inode *inode) 45160e78d2cSAbhishek Kulkarni { 4526b39f6d2SAneesh Kumar K.V struct v9fs_inode *v9inode = V9FS_I(inode); 4536b39f6d2SAneesh Kumar K.V 45491b0abe3SJohannes Weiner truncate_inode_pages_final(inode->i_mapping); 455dbd5768fSJan Kara clear_inode(inode); 45660e78d2cSAbhishek Kulkarni filemap_fdatawrite(inode->i_mapping); 45760e78d2cSAbhishek Kulkarni 45860e78d2cSAbhishek Kulkarni v9fs_cache_inode_put_cookie(inode); 4596b39f6d2SAneesh Kumar K.V /* clunk the fid stashed in writeback_fid */ 4606b39f6d2SAneesh Kumar K.V if (v9inode->writeback_fid) { 4616b39f6d2SAneesh Kumar K.V p9_client_clunk(v9inode->writeback_fid); 4626b39f6d2SAneesh Kumar K.V v9inode->writeback_fid = NULL; 4633cf387d7SAneesh Kumar K.V } 46460e78d2cSAbhishek Kulkarni } 46560e78d2cSAbhishek Kulkarni 466fd2421f5SAneesh Kumar K.V static int v9fs_test_inode(struct inode *inode, void *data) 467fd2421f5SAneesh Kumar K.V { 468fd2421f5SAneesh Kumar K.V int umode; 46945089142SAneesh Kumar K.V dev_t rdev; 470fd2421f5SAneesh Kumar K.V struct v9fs_inode *v9inode = V9FS_I(inode); 471fd2421f5SAneesh Kumar K.V struct p9_wstat *st = (struct p9_wstat *)data; 472fd2421f5SAneesh Kumar K.V struct v9fs_session_info *v9ses = v9fs_inode2v9ses(inode); 473fd2421f5SAneesh Kumar K.V 47445089142SAneesh Kumar K.V umode = p9mode2unixmode(v9ses, st, &rdev); 475fd2421f5SAneesh Kumar K.V /* don't match inode of different type */ 476fd2421f5SAneesh Kumar K.V if ((inode->i_mode & S_IFMT) != (umode & S_IFMT)) 477fd2421f5SAneesh Kumar K.V return 0; 478fd2421f5SAneesh Kumar K.V 479fd2421f5SAneesh Kumar K.V /* compare qid details */ 480fd2421f5SAneesh Kumar K.V if (memcmp(&v9inode->qid.version, 481fd2421f5SAneesh Kumar K.V &st->qid.version, sizeof(v9inode->qid.version))) 482fd2421f5SAneesh Kumar K.V return 0; 483fd2421f5SAneesh Kumar K.V 484fd2421f5SAneesh Kumar K.V if (v9inode->qid.type != st->qid.type) 485fd2421f5SAneesh Kumar K.V return 0; 486fd2421f5SAneesh Kumar K.V return 1; 487fd2421f5SAneesh Kumar K.V } 488fd2421f5SAneesh Kumar K.V 489ed80fcfaSAneesh Kumar K.V static int v9fs_test_new_inode(struct inode *inode, void *data) 490ed80fcfaSAneesh Kumar K.V { 491ed80fcfaSAneesh Kumar K.V return 0; 492ed80fcfaSAneesh Kumar K.V } 493ed80fcfaSAneesh Kumar K.V 494fd2421f5SAneesh Kumar K.V static int v9fs_set_inode(struct inode *inode, void *data) 495fd2421f5SAneesh Kumar K.V { 496fd2421f5SAneesh Kumar K.V struct v9fs_inode *v9inode = V9FS_I(inode); 497fd2421f5SAneesh Kumar K.V struct p9_wstat *st = (struct p9_wstat *)data; 498fd2421f5SAneesh Kumar K.V 499fd2421f5SAneesh Kumar K.V memcpy(&v9inode->qid, &st->qid, sizeof(st->qid)); 500fd2421f5SAneesh Kumar K.V return 0; 501fd2421f5SAneesh Kumar K.V } 502fd2421f5SAneesh Kumar K.V 5035ffc0cb3SAneesh Kumar K.V static struct inode *v9fs_qid_iget(struct super_block *sb, 5045ffc0cb3SAneesh Kumar K.V struct p9_qid *qid, 505ed80fcfaSAneesh Kumar K.V struct p9_wstat *st, 506ed80fcfaSAneesh Kumar K.V int new) 5075ffc0cb3SAneesh Kumar K.V { 50845089142SAneesh Kumar K.V dev_t rdev; 5093eda0de6SAl Viro int retval; 5103eda0de6SAl Viro umode_t umode; 5115ffc0cb3SAneesh Kumar K.V unsigned long i_ino; 5125ffc0cb3SAneesh Kumar K.V struct inode *inode; 5135ffc0cb3SAneesh Kumar K.V struct v9fs_session_info *v9ses = sb->s_fs_info; 514ed80fcfaSAneesh Kumar K.V int (*test)(struct inode *, void *); 515ed80fcfaSAneesh Kumar K.V 516ed80fcfaSAneesh Kumar K.V if (new) 517ed80fcfaSAneesh Kumar K.V test = v9fs_test_new_inode; 518ed80fcfaSAneesh Kumar K.V else 519ed80fcfaSAneesh Kumar K.V test = v9fs_test_inode; 5205ffc0cb3SAneesh Kumar K.V 5215ffc0cb3SAneesh Kumar K.V i_ino = v9fs_qid2ino(qid); 522ed80fcfaSAneesh Kumar K.V inode = iget5_locked(sb, i_ino, test, v9fs_set_inode, st); 5235ffc0cb3SAneesh Kumar K.V if (!inode) 5245ffc0cb3SAneesh Kumar K.V return ERR_PTR(-ENOMEM); 5255ffc0cb3SAneesh Kumar K.V if (!(inode->i_state & I_NEW)) 5265ffc0cb3SAneesh Kumar K.V return inode; 5275ffc0cb3SAneesh Kumar K.V /* 5285ffc0cb3SAneesh Kumar K.V * initialize the inode with the stat info 5295ffc0cb3SAneesh Kumar K.V * FIXME!! we may need support for stale inodes 5305ffc0cb3SAneesh Kumar K.V * later. 5315ffc0cb3SAneesh Kumar K.V */ 532fd2421f5SAneesh Kumar K.V inode->i_ino = i_ino; 53345089142SAneesh Kumar K.V umode = p9mode2unixmode(v9ses, st, &rdev); 53445089142SAneesh Kumar K.V retval = v9fs_init_inode(v9ses, inode, umode, rdev); 5355ffc0cb3SAneesh Kumar K.V if (retval) 5365ffc0cb3SAneesh Kumar K.V goto error; 5375ffc0cb3SAneesh Kumar K.V 5385ffc0cb3SAneesh Kumar K.V v9fs_stat2inode(st, inode, sb); 5395ffc0cb3SAneesh Kumar K.V v9fs_cache_inode_get_cookie(inode); 5405ffc0cb3SAneesh Kumar K.V unlock_new_inode(inode); 5415ffc0cb3SAneesh Kumar K.V return inode; 5425ffc0cb3SAneesh Kumar K.V error: 5430a73d0a2SAl Viro iget_failed(inode); 5445ffc0cb3SAneesh Kumar K.V return ERR_PTR(retval); 5455ffc0cb3SAneesh Kumar K.V 5465ffc0cb3SAneesh Kumar K.V } 5475ffc0cb3SAneesh Kumar K.V 54853c06f4eSAneesh Kumar K.V struct inode * 549a78ce05dSAneesh Kumar K.V v9fs_inode_from_fid(struct v9fs_session_info *v9ses, struct p9_fid *fid, 550ed80fcfaSAneesh Kumar K.V struct super_block *sb, int new) 5516a3124a3SLatchesar Ionkov { 55251a87c55SEric Van Hensbergen struct p9_wstat *st; 5535ffc0cb3SAneesh Kumar K.V struct inode *inode = NULL; 5546a3124a3SLatchesar Ionkov 555bd238fb4SLatchesar Ionkov st = p9_client_stat(fid); 55602bc3567SAbhishek Kulkarni if (IS_ERR(st)) 55702bc3567SAbhishek Kulkarni return ERR_CAST(st); 5582bad8471SEric Van Hensbergen 559ed80fcfaSAneesh Kumar K.V inode = v9fs_qid_iget(sb, &st->qid, st, new); 56002bc3567SAbhishek Kulkarni p9stat_free(st); 561bd238fb4SLatchesar Ionkov kfree(st); 5625ffc0cb3SAneesh Kumar K.V return inode; 5632bad8471SEric Van Hensbergen } 5642bad8471SEric Van Hensbergen 5652bad8471SEric Van Hensbergen /** 566f88657ceSAneesh Kumar K.V * v9fs_at_to_dotl_flags- convert Linux specific AT flags to 567f88657ceSAneesh Kumar K.V * plan 9 AT flag. 568f88657ceSAneesh Kumar K.V * @flags: flags to convert 569f88657ceSAneesh Kumar K.V */ 570f88657ceSAneesh Kumar K.V static int v9fs_at_to_dotl_flags(int flags) 571f88657ceSAneesh Kumar K.V { 572f88657ceSAneesh Kumar K.V int rflags = 0; 573f88657ceSAneesh Kumar K.V if (flags & AT_REMOVEDIR) 574f88657ceSAneesh Kumar K.V rflags |= P9_DOTL_AT_REMOVEDIR; 575f88657ceSAneesh Kumar K.V return rflags; 576f88657ceSAneesh Kumar K.V } 577f88657ceSAneesh Kumar K.V 578f88657ceSAneesh Kumar K.V /** 5792bad8471SEric Van Hensbergen * v9fs_remove - helper function to remove files and directories 58073c592b9SEric Van Hensbergen * @dir: directory inode that is being deleted 58148e370ffSAneesh Kumar K.V * @dentry: dentry that is being deleted 582fd2916bdSFabian Frederick * @flags: removing a directory 5832bad8471SEric Van Hensbergen * 5842bad8471SEric Van Hensbergen */ 5852bad8471SEric Van Hensbergen 58648e370ffSAneesh Kumar K.V static int v9fs_remove(struct inode *dir, struct dentry *dentry, int flags) 5872bad8471SEric Van Hensbergen { 58848e370ffSAneesh Kumar K.V struct inode *inode; 58948e370ffSAneesh Kumar K.V int retval = -EOPNOTSUPP; 59048e370ffSAneesh Kumar K.V struct p9_fid *v9fid, *dfid; 59148e370ffSAneesh Kumar K.V struct v9fs_session_info *v9ses; 5922bad8471SEric Van Hensbergen 5935d385153SJoe Perches p9_debug(P9_DEBUG_VFS, "inode: %p dentry: %p rmdir: %x\n", 59448e370ffSAneesh Kumar K.V dir, dentry, flags); 5952bad8471SEric Van Hensbergen 59648e370ffSAneesh Kumar K.V v9ses = v9fs_inode2v9ses(dir); 5972b0143b5SDavid Howells inode = d_inode(dentry); 59848e370ffSAneesh Kumar K.V dfid = v9fs_fid_lookup(dentry->d_parent); 59948e370ffSAneesh Kumar K.V if (IS_ERR(dfid)) { 60048e370ffSAneesh Kumar K.V retval = PTR_ERR(dfid); 6015d385153SJoe Perches p9_debug(P9_DEBUG_VFS, "fid lookup failed %d\n", retval); 60248e370ffSAneesh Kumar K.V return retval; 60348e370ffSAneesh Kumar K.V } 60448e370ffSAneesh Kumar K.V if (v9fs_proto_dotl(v9ses)) 605f88657ceSAneesh Kumar K.V retval = p9_client_unlinkat(dfid, dentry->d_name.name, 606f88657ceSAneesh Kumar K.V v9fs_at_to_dotl_flags(flags)); 60748e370ffSAneesh Kumar K.V if (retval == -EOPNOTSUPP) { 60848e370ffSAneesh Kumar K.V /* Try the one based on path */ 60948e370ffSAneesh Kumar K.V v9fid = v9fs_fid_clone(dentry); 610da977b2cSEric Van Hensbergen if (IS_ERR(v9fid)) 611da977b2cSEric Van Hensbergen return PTR_ERR(v9fid); 612d994f405SAneesh Kumar K.V retval = p9_client_remove(v9fid); 61348e370ffSAneesh Kumar K.V } 614b271ec47SAneesh Kumar K.V if (!retval) { 615b271ec47SAneesh Kumar K.V /* 616b271ec47SAneesh Kumar K.V * directories on unlink should have zero 617b271ec47SAneesh Kumar K.V * link count 618b271ec47SAneesh Kumar K.V */ 61948e370ffSAneesh Kumar K.V if (flags & AT_REMOVEDIR) { 62048e370ffSAneesh Kumar K.V clear_nlink(inode); 621b271ec47SAneesh Kumar K.V drop_nlink(dir); 622b271ec47SAneesh Kumar K.V } else 62348e370ffSAneesh Kumar K.V drop_nlink(inode); 624d28c61f0SAneesh Kumar K.V 62548e370ffSAneesh Kumar K.V v9fs_invalidate_inode_attr(inode); 626d28c61f0SAneesh Kumar K.V v9fs_invalidate_inode_attr(dir); 627b271ec47SAneesh Kumar K.V } 628d994f405SAneesh Kumar K.V return retval; 6292bad8471SEric Van Hensbergen } 6302bad8471SEric Van Hensbergen 631bd238fb4SLatchesar Ionkov /** 632bd238fb4SLatchesar Ionkov * v9fs_create - Create a file 633ee443996SEric Van Hensbergen * @v9ses: session information 634ee443996SEric Van Hensbergen * @dir: directory that dentry is being created in 635bd238fb4SLatchesar Ionkov * @dentry: dentry that is being created 6360e15597eSAbhishek Kulkarni * @extension: 9p2000.u extension string to support devices, etc. 637bd238fb4SLatchesar Ionkov * @perm: create permissions 638bd238fb4SLatchesar Ionkov * @mode: open mode 639bd238fb4SLatchesar Ionkov * 640bd238fb4SLatchesar Ionkov */ 641bd238fb4SLatchesar Ionkov static struct p9_fid * 642bd238fb4SLatchesar Ionkov v9fs_create(struct v9fs_session_info *v9ses, struct inode *dir, 643bd238fb4SLatchesar Ionkov struct dentry *dentry, char *extension, u32 perm, u8 mode) 644bd238fb4SLatchesar Ionkov { 645bd238fb4SLatchesar Ionkov int err; 646bd238fb4SLatchesar Ionkov char *name; 647bd238fb4SLatchesar Ionkov struct p9_fid *dfid, *ofid, *fid; 648bd238fb4SLatchesar Ionkov struct inode *inode; 649bd238fb4SLatchesar Ionkov 6504b8e9923SAl Viro p9_debug(P9_DEBUG_VFS, "name %pd\n", dentry); 65151a87c55SEric Van Hensbergen 652bd238fb4SLatchesar Ionkov err = 0; 653bd238fb4SLatchesar Ionkov ofid = NULL; 654bd238fb4SLatchesar Ionkov fid = NULL; 655bd238fb4SLatchesar Ionkov name = (char *) dentry->d_name.name; 6566d27e64dSVenkateswararao Jujjuri dfid = v9fs_fid_lookup(dentry->d_parent); 657bd238fb4SLatchesar Ionkov if (IS_ERR(dfid)) { 658bd238fb4SLatchesar Ionkov err = PTR_ERR(dfid); 6595d385153SJoe Perches p9_debug(P9_DEBUG_VFS, "fid lookup failed %d\n", err); 6606d27e64dSVenkateswararao Jujjuri return ERR_PTR(err); 661bd238fb4SLatchesar Ionkov } 662bd238fb4SLatchesar Ionkov 663bd238fb4SLatchesar Ionkov /* clone a fid to use for creation */ 664bd238fb4SLatchesar Ionkov ofid = p9_client_walk(dfid, 0, NULL, 1); 665bd238fb4SLatchesar Ionkov if (IS_ERR(ofid)) { 666bd238fb4SLatchesar Ionkov err = PTR_ERR(ofid); 6675d385153SJoe Perches p9_debug(P9_DEBUG_VFS, "p9_client_walk failed %d\n", err); 6686d27e64dSVenkateswararao Jujjuri return ERR_PTR(err); 669bd238fb4SLatchesar Ionkov } 670bd238fb4SLatchesar Ionkov 671bd238fb4SLatchesar Ionkov err = p9_client_fcreate(ofid, name, perm, mode, extension); 67251a87c55SEric Van Hensbergen if (err < 0) { 6735d385153SJoe Perches p9_debug(P9_DEBUG_VFS, "p9_client_fcreate failed %d\n", err); 674bd238fb4SLatchesar Ionkov goto error; 67551a87c55SEric Van Hensbergen } 676bd238fb4SLatchesar Ionkov 677b6054793SAneesh Kumar K.V if (!(perm & P9_DMLINK)) { 678bd238fb4SLatchesar Ionkov /* now walk from the parent so we can get unopened fid */ 6796d27e64dSVenkateswararao Jujjuri fid = p9_client_walk(dfid, 1, &name, 1); 680bd238fb4SLatchesar Ionkov if (IS_ERR(fid)) { 681bd238fb4SLatchesar Ionkov err = PTR_ERR(fid); 682b6054793SAneesh Kumar K.V p9_debug(P9_DEBUG_VFS, 683b6054793SAneesh Kumar K.V "p9_client_walk failed %d\n", err); 684bd238fb4SLatchesar Ionkov fid = NULL; 685bd238fb4SLatchesar Ionkov goto error; 6866d27e64dSVenkateswararao Jujjuri } 687b6054793SAneesh Kumar K.V /* 688b6054793SAneesh Kumar K.V * instantiate inode and assign the unopened fid to the dentry 689b6054793SAneesh Kumar K.V */ 690ed80fcfaSAneesh Kumar K.V inode = v9fs_get_new_inode_from_fid(v9ses, fid, dir->i_sb); 691bd238fb4SLatchesar Ionkov if (IS_ERR(inode)) { 692bd238fb4SLatchesar Ionkov err = PTR_ERR(inode); 693b6054793SAneesh Kumar K.V p9_debug(P9_DEBUG_VFS, 694b6054793SAneesh Kumar K.V "inode creation failed %d\n", err); 695bd238fb4SLatchesar Ionkov goto error; 696bd238fb4SLatchesar Ionkov } 6972ea03e1dSAl Viro v9fs_fid_add(dentry, fid); 6985441ae5eSAneesh Kumar K.V d_instantiate(dentry, inode); 699b6054793SAneesh Kumar K.V } 700bd238fb4SLatchesar Ionkov return ofid; 701bd238fb4SLatchesar Ionkov error: 702bd238fb4SLatchesar Ionkov if (ofid) 703bd238fb4SLatchesar Ionkov p9_client_clunk(ofid); 704bd238fb4SLatchesar Ionkov 705bd238fb4SLatchesar Ionkov if (fid) 706bd238fb4SLatchesar Ionkov p9_client_clunk(fid); 707bd238fb4SLatchesar Ionkov 708bd238fb4SLatchesar Ionkov return ERR_PTR(err); 709bd238fb4SLatchesar Ionkov } 710bd238fb4SLatchesar Ionkov 7112bad8471SEric Van Hensbergen /** 712e43ae79cSMiklos Szeredi * v9fs_vfs_create - VFS hook to create a regular file 713e43ae79cSMiklos Szeredi * 714e43ae79cSMiklos Szeredi * open(.., O_CREAT) is handled in v9fs_vfs_atomic_open(). This is only called 715e43ae79cSMiklos Szeredi * for mknod(2). 716e43ae79cSMiklos Szeredi * 717ee443996SEric Van Hensbergen * @dir: directory inode that is being created 7182bad8471SEric Van Hensbergen * @dentry: dentry that is being deleted 7196a3124a3SLatchesar Ionkov * @mode: create permissions 7202bad8471SEric Van Hensbergen * 7212bad8471SEric Van Hensbergen */ 7222bad8471SEric Van Hensbergen 7232bad8471SEric Van Hensbergen static int 7244acdaf27SAl Viro v9fs_vfs_create(struct inode *dir, struct dentry *dentry, umode_t mode, 725ebfc3b49SAl Viro bool excl) 7262bad8471SEric Van Hensbergen { 727e43ae79cSMiklos Szeredi struct v9fs_session_info *v9ses = v9fs_inode2v9ses(dir); 728e43ae79cSMiklos Szeredi u32 perm = unixmode2p9mode(v9ses, mode); 729e43ae79cSMiklos Szeredi struct p9_fid *fid; 7306a3124a3SLatchesar Ionkov 731e43ae79cSMiklos Szeredi /* P9_OEXCL? */ 732e43ae79cSMiklos Szeredi fid = v9fs_create(v9ses, dir, dentry, NULL, perm, P9_ORDWR); 733e43ae79cSMiklos Szeredi if (IS_ERR(fid)) 734e43ae79cSMiklos Szeredi return PTR_ERR(fid); 7356a3124a3SLatchesar Ionkov 736d28c61f0SAneesh Kumar K.V v9fs_invalidate_inode_attr(dir); 737bd238fb4SLatchesar Ionkov p9_client_clunk(fid); 7386a3124a3SLatchesar Ionkov 7396a3124a3SLatchesar Ionkov return 0; 7402bad8471SEric Van Hensbergen } 7412bad8471SEric Van Hensbergen 7422bad8471SEric Van Hensbergen /** 7432bad8471SEric Van Hensbergen * v9fs_vfs_mkdir - VFS mkdir hook to create a directory 744ee443996SEric Van Hensbergen * @dir: inode that is being unlinked 7452bad8471SEric Van Hensbergen * @dentry: dentry that is being unlinked 7462bad8471SEric Van Hensbergen * @mode: mode for new directory 7472bad8471SEric Van Hensbergen * 7482bad8471SEric Van Hensbergen */ 7492bad8471SEric Van Hensbergen 75018bb1db3SAl Viro static int v9fs_vfs_mkdir(struct inode *dir, struct dentry *dentry, umode_t mode) 7512bad8471SEric Van Hensbergen { 7526a3124a3SLatchesar Ionkov int err; 753bd238fb4SLatchesar Ionkov u32 perm; 754bd238fb4SLatchesar Ionkov struct p9_fid *fid; 755d28c61f0SAneesh Kumar K.V struct v9fs_session_info *v9ses; 7566a3124a3SLatchesar Ionkov 7574b8e9923SAl Viro p9_debug(P9_DEBUG_VFS, "name %pd\n", dentry); 758bd238fb4SLatchesar Ionkov err = 0; 7596a3124a3SLatchesar Ionkov v9ses = v9fs_inode2v9ses(dir); 7606a3124a3SLatchesar Ionkov perm = unixmode2p9mode(v9ses, mode | S_IFDIR); 761bd238fb4SLatchesar Ionkov fid = v9fs_create(v9ses, dir, dentry, NULL, perm, P9_OREAD); 762bd238fb4SLatchesar Ionkov if (IS_ERR(fid)) { 763bd238fb4SLatchesar Ionkov err = PTR_ERR(fid); 764bd238fb4SLatchesar Ionkov fid = NULL; 765d28c61f0SAneesh Kumar K.V } else { 766b271ec47SAneesh Kumar K.V inc_nlink(dir); 767d28c61f0SAneesh Kumar K.V v9fs_invalidate_inode_attr(dir); 768d28c61f0SAneesh Kumar K.V } 7696a3124a3SLatchesar Ionkov 770bd238fb4SLatchesar Ionkov if (fid) 771bd238fb4SLatchesar Ionkov p9_client_clunk(fid); 7726a3124a3SLatchesar Ionkov 7736a3124a3SLatchesar Ionkov return err; 7742bad8471SEric Van Hensbergen } 7752bad8471SEric Van Hensbergen 7762bad8471SEric Van Hensbergen /** 7772bad8471SEric Van Hensbergen * v9fs_vfs_lookup - VFS lookup hook to "walk" to a new inode 7782bad8471SEric Van Hensbergen * @dir: inode that is being walked from 7792bad8471SEric Van Hensbergen * @dentry: dentry that is being walked to? 780fd2916bdSFabian Frederick * @flags: lookup flags (unused) 7812bad8471SEric Van Hensbergen * 7822bad8471SEric Van Hensbergen */ 7832bad8471SEric Van Hensbergen 78453c06f4eSAneesh Kumar K.V struct dentry *v9fs_vfs_lookup(struct inode *dir, struct dentry *dentry, 78500cd8dd3SAl Viro unsigned int flags) 7862bad8471SEric Van Hensbergen { 78773f50717SAneesh Kumar K.V struct dentry *res; 7882bad8471SEric Van Hensbergen struct v9fs_session_info *v9ses; 789bd238fb4SLatchesar Ionkov struct p9_fid *dfid, *fid; 7902bad8471SEric Van Hensbergen struct inode *inode; 791bd238fb4SLatchesar Ionkov char *name; 7922bad8471SEric Van Hensbergen 7934b8e9923SAl Viro p9_debug(P9_DEBUG_VFS, "dir: %p dentry: (%pd) %p flags: %x\n", 7944b8e9923SAl Viro dir, dentry, dentry, flags); 7952bad8471SEric Van Hensbergen 79611e9b49bSSripathi Kodi if (dentry->d_name.len > NAME_MAX) 79711e9b49bSSripathi Kodi return ERR_PTR(-ENAMETOOLONG); 79811e9b49bSSripathi Kodi 7992bad8471SEric Van Hensbergen v9ses = v9fs_inode2v9ses(dir); 800a534c8d1SAneesh Kumar K.V /* We can walk d_parent because we hold the dir->i_mutex */ 801bd238fb4SLatchesar Ionkov dfid = v9fs_fid_lookup(dentry->d_parent); 802bd238fb4SLatchesar Ionkov if (IS_ERR(dfid)) 803e231c2eeSDavid Howells return ERR_CAST(dfid); 8042bad8471SEric Van Hensbergen 805bd238fb4SLatchesar Ionkov name = (char *) dentry->d_name.name; 806bd238fb4SLatchesar Ionkov fid = p9_client_walk(dfid, 1, &name, 1); 807bd238fb4SLatchesar Ionkov if (IS_ERR(fid)) { 8087b5be621SAl Viro if (fid == ERR_PTR(-ENOENT)) { 8097b5be621SAl Viro d_add(dentry, NULL); 8107b5be621SAl Viro return NULL; 8112bad8471SEric Van Hensbergen } 8127b5be621SAl Viro return ERR_CAST(fid); 8132bad8471SEric Van Hensbergen } 81473f50717SAneesh Kumar K.V /* 81573f50717SAneesh Kumar K.V * Make sure we don't use a wrong inode due to parallel 81673f50717SAneesh Kumar K.V * unlink. For cached mode create calls request for new 81773f50717SAneesh Kumar K.V * inode. But with cache disabled, lookup should do this. 81873f50717SAneesh Kumar K.V */ 819fb89b45cSDominique Martinet if (v9ses->cache == CACHE_LOOSE || v9ses->cache == CACHE_FSCACHE) 820a78ce05dSAneesh Kumar K.V inode = v9fs_get_inode_from_fid(v9ses, fid, dir->i_sb); 82173f50717SAneesh Kumar K.V else 82273f50717SAneesh Kumar K.V inode = v9fs_get_new_inode_from_fid(v9ses, fid, dir->i_sb); 823bd238fb4SLatchesar Ionkov if (IS_ERR(inode)) { 8247b5be621SAl Viro p9_client_clunk(fid); 8257b5be621SAl Viro return ERR_CAST(inode); 8262bad8471SEric Van Hensbergen } 82773f50717SAneesh Kumar K.V /* 82873f50717SAneesh Kumar K.V * If we had a rename on the server and a parallel lookup 82973f50717SAneesh Kumar K.V * for the new name, then make sure we instantiate with 83073f50717SAneesh Kumar K.V * the new name. ie look up for a/b, while on server somebody 83173f50717SAneesh Kumar K.V * moved b under k and client parallely did a lookup for 83273f50717SAneesh Kumar K.V * k/b. 83373f50717SAneesh Kumar K.V */ 83441d28bcaSAl Viro res = d_splice_alias(inode, dentry); 835a3b2157eSAl Viro if (!res) 836a3b2157eSAl Viro v9fs_fid_add(dentry, fid); 837a3b2157eSAl Viro else if (!IS_ERR(res)) 838a3b2157eSAl Viro v9fs_fid_add(res, fid); 839a3b2157eSAl Viro else 840bd238fb4SLatchesar Ionkov p9_client_clunk(fid); 8417b5be621SAl Viro return res; 8422bad8471SEric Van Hensbergen } 8432bad8471SEric Van Hensbergen 844d9585277SAl Viro static int 845e43ae79cSMiklos Szeredi v9fs_vfs_atomic_open(struct inode *dir, struct dentry *dentry, 84630d90494SAl Viro struct file *file, unsigned flags, umode_t mode, 84747237687SAl Viro int *opened) 848e43ae79cSMiklos Szeredi { 849e43ae79cSMiklos Szeredi int err; 850e43ae79cSMiklos Szeredi u32 perm; 851e43ae79cSMiklos Szeredi struct v9fs_inode *v9inode; 852e43ae79cSMiklos Szeredi struct v9fs_session_info *v9ses; 853e43ae79cSMiklos Szeredi struct p9_fid *fid, *inode_fid; 854e43ae79cSMiklos Szeredi struct dentry *res = NULL; 855e43ae79cSMiklos Szeredi 856e43ae79cSMiklos Szeredi if (d_unhashed(dentry)) { 85700cd8dd3SAl Viro res = v9fs_vfs_lookup(dir, dentry, 0); 858e43ae79cSMiklos Szeredi if (IS_ERR(res)) 859d9585277SAl Viro return PTR_ERR(res); 860e43ae79cSMiklos Szeredi 861e43ae79cSMiklos Szeredi if (res) 862e43ae79cSMiklos Szeredi dentry = res; 863e43ae79cSMiklos Szeredi } 864e43ae79cSMiklos Szeredi 865e43ae79cSMiklos Szeredi /* Only creates */ 8662b0143b5SDavid Howells if (!(flags & O_CREAT) || d_really_is_positive(dentry)) 867e45198a6SAl Viro return finish_no_open(file, res); 868e43ae79cSMiklos Szeredi 869e43ae79cSMiklos Szeredi err = 0; 870fae74696SGeyslan G. Bem 871e43ae79cSMiklos Szeredi v9ses = v9fs_inode2v9ses(dir); 872e43ae79cSMiklos Szeredi perm = unixmode2p9mode(v9ses, mode); 873e43ae79cSMiklos Szeredi fid = v9fs_create(v9ses, dir, dentry, NULL, perm, 874e43ae79cSMiklos Szeredi v9fs_uflags2omode(flags, 875e43ae79cSMiklos Szeredi v9fs_proto_dotu(v9ses))); 876e43ae79cSMiklos Szeredi if (IS_ERR(fid)) { 877e43ae79cSMiklos Szeredi err = PTR_ERR(fid); 878e43ae79cSMiklos Szeredi fid = NULL; 879e43ae79cSMiklos Szeredi goto error; 880e43ae79cSMiklos Szeredi } 881e43ae79cSMiklos Szeredi 882e43ae79cSMiklos Szeredi v9fs_invalidate_inode_attr(dir); 8832b0143b5SDavid Howells v9inode = V9FS_I(d_inode(dentry)); 884e43ae79cSMiklos Szeredi mutex_lock(&v9inode->v_mutex); 885fb89b45cSDominique Martinet if ((v9ses->cache == CACHE_LOOSE || v9ses->cache == CACHE_FSCACHE) && 886fb89b45cSDominique Martinet !v9inode->writeback_fid && 887e43ae79cSMiklos Szeredi ((flags & O_ACCMODE) != O_RDONLY)) { 888e43ae79cSMiklos Szeredi /* 889e43ae79cSMiklos Szeredi * clone a fid and add it to writeback_fid 890e43ae79cSMiklos Szeredi * we do it during open time instead of 891e43ae79cSMiklos Szeredi * page dirty time via write_begin/page_mkwrite 892e43ae79cSMiklos Szeredi * because we want write after unlink usecase 893e43ae79cSMiklos Szeredi * to work. 894e43ae79cSMiklos Szeredi */ 895e43ae79cSMiklos Szeredi inode_fid = v9fs_writeback_fid(dentry); 896e43ae79cSMiklos Szeredi if (IS_ERR(inode_fid)) { 897e43ae79cSMiklos Szeredi err = PTR_ERR(inode_fid); 898e43ae79cSMiklos Szeredi mutex_unlock(&v9inode->v_mutex); 899e43ae79cSMiklos Szeredi goto error; 900e43ae79cSMiklos Szeredi } 901e43ae79cSMiklos Szeredi v9inode->writeback_fid = (void *) inode_fid; 902e43ae79cSMiklos Szeredi } 903e43ae79cSMiklos Szeredi mutex_unlock(&v9inode->v_mutex); 90430d90494SAl Viro err = finish_open(file, dentry, generic_file_open, opened); 90530d90494SAl Viro if (err) 906e43ae79cSMiklos Szeredi goto error; 907e43ae79cSMiklos Szeredi 90830d90494SAl Viro file->private_data = fid; 909fb89b45cSDominique Martinet if (v9ses->cache == CACHE_LOOSE || v9ses->cache == CACHE_FSCACHE) 9102b0143b5SDavid Howells v9fs_cache_inode_set_cookie(d_inode(dentry), file); 911e43ae79cSMiklos Szeredi 91247237687SAl Viro *opened |= FILE_CREATED; 913e43ae79cSMiklos Szeredi out: 914e43ae79cSMiklos Szeredi dput(res); 915d9585277SAl Viro return err; 916e43ae79cSMiklos Szeredi 917e43ae79cSMiklos Szeredi error: 918e43ae79cSMiklos Szeredi if (fid) 919e43ae79cSMiklos Szeredi p9_client_clunk(fid); 920e43ae79cSMiklos Szeredi goto out; 921e43ae79cSMiklos Szeredi } 922e43ae79cSMiklos Szeredi 9232bad8471SEric Van Hensbergen /** 9242bad8471SEric Van Hensbergen * v9fs_vfs_unlink - VFS unlink hook to delete an inode 9252bad8471SEric Van Hensbergen * @i: inode that is being unlinked 92673c592b9SEric Van Hensbergen * @d: dentry that is being unlinked 9272bad8471SEric Van Hensbergen * 9282bad8471SEric Van Hensbergen */ 9292bad8471SEric Van Hensbergen 93053c06f4eSAneesh Kumar K.V int v9fs_vfs_unlink(struct inode *i, struct dentry *d) 9312bad8471SEric Van Hensbergen { 9322bad8471SEric Van Hensbergen return v9fs_remove(i, d, 0); 9332bad8471SEric Van Hensbergen } 9342bad8471SEric Van Hensbergen 9352bad8471SEric Van Hensbergen /** 9362bad8471SEric Van Hensbergen * v9fs_vfs_rmdir - VFS unlink hook to delete a directory 9372bad8471SEric Van Hensbergen * @i: inode that is being unlinked 93873c592b9SEric Van Hensbergen * @d: dentry that is being unlinked 9392bad8471SEric Van Hensbergen * 9402bad8471SEric Van Hensbergen */ 9412bad8471SEric Van Hensbergen 94253c06f4eSAneesh Kumar K.V int v9fs_vfs_rmdir(struct inode *i, struct dentry *d) 9432bad8471SEric Van Hensbergen { 94448e370ffSAneesh Kumar K.V return v9fs_remove(i, d, AT_REMOVEDIR); 9452bad8471SEric Van Hensbergen } 9462bad8471SEric Van Hensbergen 9472bad8471SEric Van Hensbergen /** 9482bad8471SEric Van Hensbergen * v9fs_vfs_rename - VFS hook to rename an inode 9492bad8471SEric Van Hensbergen * @old_dir: old dir inode 9502bad8471SEric Van Hensbergen * @old_dentry: old dentry 9512bad8471SEric Van Hensbergen * @new_dir: new dir inode 9522bad8471SEric Van Hensbergen * @new_dentry: new dentry 9532bad8471SEric Van Hensbergen * 9542bad8471SEric Van Hensbergen */ 9552bad8471SEric Van Hensbergen 95653c06f4eSAneesh Kumar K.V int 9572bad8471SEric Van Hensbergen v9fs_vfs_rename(struct inode *old_dir, struct dentry *old_dentry, 9582bad8471SEric Van Hensbergen struct inode *new_dir, struct dentry *new_dentry) 9592bad8471SEric Van Hensbergen { 960d28c61f0SAneesh Kumar K.V int retval; 961bd238fb4SLatchesar Ionkov struct inode *old_inode; 962b271ec47SAneesh Kumar K.V struct inode *new_inode; 963bd238fb4SLatchesar Ionkov struct v9fs_session_info *v9ses; 964bd238fb4SLatchesar Ionkov struct p9_fid *oldfid; 965bd238fb4SLatchesar Ionkov struct p9_fid *olddirfid; 966bd238fb4SLatchesar Ionkov struct p9_fid *newdirfid; 967bd238fb4SLatchesar Ionkov struct p9_wstat wstat; 9682bad8471SEric Van Hensbergen 9695d385153SJoe Perches p9_debug(P9_DEBUG_VFS, "\n"); 970bd238fb4SLatchesar Ionkov retval = 0; 9712b0143b5SDavid Howells old_inode = d_inode(old_dentry); 9722b0143b5SDavid Howells new_inode = d_inode(new_dentry); 973bd238fb4SLatchesar Ionkov v9ses = v9fs_inode2v9ses(old_inode); 974bd238fb4SLatchesar Ionkov oldfid = v9fs_fid_lookup(old_dentry); 975da977b2cSEric Van Hensbergen if (IS_ERR(oldfid)) 976da977b2cSEric Van Hensbergen return PTR_ERR(oldfid); 977da977b2cSEric Van Hensbergen 978da977b2cSEric Van Hensbergen olddirfid = v9fs_fid_clone(old_dentry->d_parent); 979da977b2cSEric Van Hensbergen if (IS_ERR(olddirfid)) { 980da977b2cSEric Van Hensbergen retval = PTR_ERR(olddirfid); 981bd238fb4SLatchesar Ionkov goto done; 982da977b2cSEric Van Hensbergen } 983da977b2cSEric Van Hensbergen 984da977b2cSEric Van Hensbergen newdirfid = v9fs_fid_clone(new_dentry->d_parent); 985da977b2cSEric Van Hensbergen if (IS_ERR(newdirfid)) { 986da977b2cSEric Van Hensbergen retval = PTR_ERR(newdirfid); 987bd238fb4SLatchesar Ionkov goto clunk_olddir; 9882bad8471SEric Van Hensbergen } 9892bad8471SEric Van Hensbergen 990a534c8d1SAneesh Kumar K.V down_write(&v9ses->rename_sem); 9914681dbdaSSripathi Kodi if (v9fs_proto_dotl(v9ses)) { 9929e8fb38eSAneesh Kumar K.V retval = p9_client_renameat(olddirfid, old_dentry->d_name.name, 9939e8fb38eSAneesh Kumar K.V newdirfid, new_dentry->d_name.name); 9949e8fb38eSAneesh Kumar K.V if (retval == -EOPNOTSUPP) 9954681dbdaSSripathi Kodi retval = p9_client_rename(oldfid, newdirfid, 9969e8fb38eSAneesh Kumar K.V new_dentry->d_name.name); 9979e8fb38eSAneesh Kumar K.V if (retval != -EOPNOTSUPP) 9984681dbdaSSripathi Kodi goto clunk_newdir; 9994681dbdaSSripathi Kodi } 1000a534c8d1SAneesh Kumar K.V if (old_dentry->d_parent != new_dentry->d_parent) { 1001a534c8d1SAneesh Kumar K.V /* 1002a534c8d1SAneesh Kumar K.V * 9P .u can only handle file rename in the same directory 1003a534c8d1SAneesh Kumar K.V */ 10044681dbdaSSripathi Kodi 10055d385153SJoe Perches p9_debug(P9_DEBUG_ERROR, "old dir and new dir are different\n"); 1006621997cdSEric Van Hensbergen retval = -EXDEV; 1007bd238fb4SLatchesar Ionkov goto clunk_newdir; 10082bad8471SEric Van Hensbergen } 1009531b1094SLatchesar Ionkov v9fs_blank_wstat(&wstat); 1010ba17674fSLatchesar Ionkov wstat.muid = v9ses->uname; 1011531b1094SLatchesar Ionkov wstat.name = (char *) new_dentry->d_name.name; 1012bd238fb4SLatchesar Ionkov retval = p9_client_wstat(oldfid, &wstat); 10132bad8471SEric Van Hensbergen 1014bd238fb4SLatchesar Ionkov clunk_newdir: 1015b271ec47SAneesh Kumar K.V if (!retval) { 1016b271ec47SAneesh Kumar K.V if (new_inode) { 1017b271ec47SAneesh Kumar K.V if (S_ISDIR(new_inode->i_mode)) 1018b271ec47SAneesh Kumar K.V clear_nlink(new_inode); 1019b271ec47SAneesh Kumar K.V else 1020b271ec47SAneesh Kumar K.V drop_nlink(new_inode); 1021b271ec47SAneesh Kumar K.V } 1022b271ec47SAneesh Kumar K.V if (S_ISDIR(old_inode->i_mode)) { 1023b271ec47SAneesh Kumar K.V if (!new_inode) 1024b271ec47SAneesh Kumar K.V inc_nlink(new_dir); 1025b271ec47SAneesh Kumar K.V drop_nlink(old_dir); 1026b271ec47SAneesh Kumar K.V } 10273bc86de3SAneesh Kumar K.V v9fs_invalidate_inode_attr(old_inode); 1028d28c61f0SAneesh Kumar K.V v9fs_invalidate_inode_attr(old_dir); 1029d28c61f0SAneesh Kumar K.V v9fs_invalidate_inode_attr(new_dir); 10303bc86de3SAneesh Kumar K.V 1031a534c8d1SAneesh Kumar K.V /* successful rename */ 1032a534c8d1SAneesh Kumar K.V d_move(old_dentry, new_dentry); 1033b271ec47SAneesh Kumar K.V } 1034a534c8d1SAneesh Kumar K.V up_write(&v9ses->rename_sem); 103522150c4fSLatchesar Ionkov p9_client_clunk(newdirfid); 10362bad8471SEric Van Hensbergen 1037bd238fb4SLatchesar Ionkov clunk_olddir: 103822150c4fSLatchesar Ionkov p9_client_clunk(olddirfid); 10392bad8471SEric Van Hensbergen 1040bd238fb4SLatchesar Ionkov done: 10412bad8471SEric Van Hensbergen return retval; 10422bad8471SEric Van Hensbergen } 10432bad8471SEric Van Hensbergen 10442bad8471SEric Van Hensbergen /** 1045943ffb58SAdrian Bunk * v9fs_vfs_getattr - retrieve file metadata 1046ee443996SEric Van Hensbergen * @mnt: mount information 1047ee443996SEric Van Hensbergen * @dentry: file to get attributes on 1048ee443996SEric Van Hensbergen * @stat: metadata structure to populate 10492bad8471SEric Van Hensbergen * 10502bad8471SEric Van Hensbergen */ 10512bad8471SEric Van Hensbergen 10522bad8471SEric Van Hensbergen static int 10532bad8471SEric Van Hensbergen v9fs_vfs_getattr(struct vfsmount *mnt, struct dentry *dentry, 10542bad8471SEric Van Hensbergen struct kstat *stat) 10552bad8471SEric Van Hensbergen { 1056bd238fb4SLatchesar Ionkov struct v9fs_session_info *v9ses; 1057bd238fb4SLatchesar Ionkov struct p9_fid *fid; 105851a87c55SEric Van Hensbergen struct p9_wstat *st; 10592bad8471SEric Van Hensbergen 10605d385153SJoe Perches p9_debug(P9_DEBUG_VFS, "dentry: %p\n", dentry); 106142869c8aSAneesh Kumar K.V v9ses = v9fs_dentry2v9ses(dentry); 1062a1211908SAneesh Kumar K.V if (v9ses->cache == CACHE_LOOSE || v9ses->cache == CACHE_FSCACHE) { 10632b0143b5SDavid Howells generic_fillattr(d_inode(dentry), stat); 1064a1211908SAneesh Kumar K.V return 0; 1065a1211908SAneesh Kumar K.V } 1066bd238fb4SLatchesar Ionkov fid = v9fs_fid_lookup(dentry); 1067da977b2cSEric Van Hensbergen if (IS_ERR(fid)) 1068da977b2cSEric Van Hensbergen return PTR_ERR(fid); 10692bad8471SEric Van Hensbergen 1070bd238fb4SLatchesar Ionkov st = p9_client_stat(fid); 1071bd238fb4SLatchesar Ionkov if (IS_ERR(st)) 1072bd238fb4SLatchesar Ionkov return PTR_ERR(st); 10732bad8471SEric Van Hensbergen 10742b0143b5SDavid Howells v9fs_stat2inode(st, d_inode(dentry), d_inode(dentry)->i_sb); 10752b0143b5SDavid Howells generic_fillattr(d_inode(dentry), stat); 10762bad8471SEric Van Hensbergen 107762b2be59SLatchesar Ionkov p9stat_free(st); 1078bd238fb4SLatchesar Ionkov kfree(st); 1079bd238fb4SLatchesar Ionkov return 0; 10802bad8471SEric Van Hensbergen } 10812bad8471SEric Van Hensbergen 10822bad8471SEric Van Hensbergen /** 10832bad8471SEric Van Hensbergen * v9fs_vfs_setattr - set file metadata 10842bad8471SEric Van Hensbergen * @dentry: file whose metadata to set 10852bad8471SEric Van Hensbergen * @iattr: metadata assignment structure 10862bad8471SEric Van Hensbergen * 10872bad8471SEric Van Hensbergen */ 10882bad8471SEric Van Hensbergen 10892bad8471SEric Van Hensbergen static int v9fs_vfs_setattr(struct dentry *dentry, struct iattr *iattr) 10902bad8471SEric Van Hensbergen { 1091bd238fb4SLatchesar Ionkov int retval; 1092bd238fb4SLatchesar Ionkov struct v9fs_session_info *v9ses; 1093bd238fb4SLatchesar Ionkov struct p9_fid *fid; 1094bd238fb4SLatchesar Ionkov struct p9_wstat wstat; 10952bad8471SEric Van Hensbergen 10965d385153SJoe Perches p9_debug(P9_DEBUG_VFS, "\n"); 10972b0143b5SDavid Howells retval = inode_change_ok(d_inode(dentry), iattr); 1098059c138bSAneesh Kumar K.V if (retval) 1099059c138bSAneesh Kumar K.V return retval; 1100059c138bSAneesh Kumar K.V 1101bd238fb4SLatchesar Ionkov retval = -EPERM; 110242869c8aSAneesh Kumar K.V v9ses = v9fs_dentry2v9ses(dentry); 1103bd238fb4SLatchesar Ionkov fid = v9fs_fid_lookup(dentry); 1104da977b2cSEric Van Hensbergen if(IS_ERR(fid)) 1105da977b2cSEric Van Hensbergen return PTR_ERR(fid); 11062bad8471SEric Van Hensbergen 1107531b1094SLatchesar Ionkov v9fs_blank_wstat(&wstat); 11082bad8471SEric Van Hensbergen if (iattr->ia_valid & ATTR_MODE) 1109531b1094SLatchesar Ionkov wstat.mode = unixmode2p9mode(v9ses, iattr->ia_mode); 11102bad8471SEric Van Hensbergen 11112bad8471SEric Van Hensbergen if (iattr->ia_valid & ATTR_MTIME) 1112531b1094SLatchesar Ionkov wstat.mtime = iattr->ia_mtime.tv_sec; 11132bad8471SEric Van Hensbergen 11142bad8471SEric Van Hensbergen if (iattr->ia_valid & ATTR_ATIME) 1115531b1094SLatchesar Ionkov wstat.atime = iattr->ia_atime.tv_sec; 11162bad8471SEric Van Hensbergen 11172bad8471SEric Van Hensbergen if (iattr->ia_valid & ATTR_SIZE) 1118531b1094SLatchesar Ionkov wstat.length = iattr->ia_size; 11192bad8471SEric Van Hensbergen 1120dd6102fbSSripathi Kodi if (v9fs_proto_dotu(v9ses)) { 1121531b1094SLatchesar Ionkov if (iattr->ia_valid & ATTR_UID) 1122531b1094SLatchesar Ionkov wstat.n_uid = iattr->ia_uid; 11232bad8471SEric Van Hensbergen 1124531b1094SLatchesar Ionkov if (iattr->ia_valid & ATTR_GID) 1125531b1094SLatchesar Ionkov wstat.n_gid = iattr->ia_gid; 11262bad8471SEric Van Hensbergen } 1127059c138bSAneesh Kumar K.V 11283dc5436aSAneesh Kumar K.V /* Write all dirty data */ 1129e36cb0b8SDavid Howells if (d_is_reg(dentry)) 11302b0143b5SDavid Howells filemap_write_and_wait(d_inode(dentry)->i_mapping); 11313dc5436aSAneesh Kumar K.V 1132f10fc50fSAneesh Kumar K.V retval = p9_client_wstat(fid, &wstat); 1133f10fc50fSAneesh Kumar K.V if (retval < 0) 1134f10fc50fSAneesh Kumar K.V return retval; 1135059c138bSAneesh Kumar K.V 1136059c138bSAneesh Kumar K.V if ((iattr->ia_valid & ATTR_SIZE) && 11372b0143b5SDavid Howells iattr->ia_size != i_size_read(d_inode(dentry))) 11382b0143b5SDavid Howells truncate_setsize(d_inode(dentry), iattr->ia_size); 1139059c138bSAneesh Kumar K.V 11402b0143b5SDavid Howells v9fs_invalidate_inode_attr(d_inode(dentry)); 11411025774cSChristoph Hellwig 11422b0143b5SDavid Howells setattr_copy(d_inode(dentry), iattr); 11432b0143b5SDavid Howells mark_inode_dirty(d_inode(dentry)); 11441025774cSChristoph Hellwig return 0; 11452bad8471SEric Van Hensbergen } 11462bad8471SEric Van Hensbergen 11472bad8471SEric Van Hensbergen /** 1148531b1094SLatchesar Ionkov * v9fs_stat2inode - populate an inode structure with mistat info 1149531b1094SLatchesar Ionkov * @stat: Plan 9 metadata (mistat) structure 11502bad8471SEric Van Hensbergen * @inode: inode to populate 11512bad8471SEric Van Hensbergen * @sb: superblock of filesystem 11522bad8471SEric Van Hensbergen * 11532bad8471SEric Van Hensbergen */ 11542bad8471SEric Van Hensbergen 11552bad8471SEric Van Hensbergen void 115651a87c55SEric Van Hensbergen v9fs_stat2inode(struct p9_wstat *stat, struct inode *inode, 11572bad8471SEric Van Hensbergen struct super_block *sb) 11582bad8471SEric Van Hensbergen { 11593eda0de6SAl Viro umode_t mode; 1160531b1094SLatchesar Ionkov char ext[32]; 11615717144aSAneesh Kumar K.V char tag_name[14]; 11625717144aSAneesh Kumar K.V unsigned int i_nlink; 11632bad8471SEric Van Hensbergen struct v9fs_session_info *v9ses = sb->s_fs_info; 1164b3cbea03SAneesh Kumar K.V struct v9fs_inode *v9inode = V9FS_I(inode); 11652bad8471SEric Van Hensbergen 1166bfe86848SMiklos Szeredi set_nlink(inode, 1); 11672bad8471SEric Van Hensbergen 1168531b1094SLatchesar Ionkov inode->i_atime.tv_sec = stat->atime; 1169531b1094SLatchesar Ionkov inode->i_mtime.tv_sec = stat->mtime; 1170531b1094SLatchesar Ionkov inode->i_ctime.tv_sec = stat->mtime; 11712bad8471SEric Van Hensbergen 1172bd32b82dSLatchesar Ionkov inode->i_uid = v9ses->dfltuid; 1173bd32b82dSLatchesar Ionkov inode->i_gid = v9ses->dfltgid; 11742bad8471SEric Van Hensbergen 1175dd6102fbSSripathi Kodi if (v9fs_proto_dotu(v9ses)) { 1176531b1094SLatchesar Ionkov inode->i_uid = stat->n_uid; 1177531b1094SLatchesar Ionkov inode->i_gid = stat->n_gid; 1178531b1094SLatchesar Ionkov } 11795717144aSAneesh Kumar K.V if ((S_ISREG(inode->i_mode)) || (S_ISDIR(inode->i_mode))) { 11805717144aSAneesh Kumar K.V if (v9fs_proto_dotu(v9ses) && (stat->extension[0] != '\0')) { 11815717144aSAneesh Kumar K.V /* 11825717144aSAneesh Kumar K.V * Hadlink support got added later to 11835717144aSAneesh Kumar K.V * to the .u extension. So there can be 11845717144aSAneesh Kumar K.V * server out there that doesn't support 11855717144aSAneesh Kumar K.V * this even with .u extension. So check 11865717144aSAneesh Kumar K.V * for non NULL stat->extension 11875717144aSAneesh Kumar K.V */ 1188b3f8ab4bSChen Gang strlcpy(ext, stat->extension, sizeof(ext)); 11895717144aSAneesh Kumar K.V /* HARDLINKCOUNT %u */ 11905717144aSAneesh Kumar K.V sscanf(ext, "%13s %u", tag_name, &i_nlink); 11915717144aSAneesh Kumar K.V if (!strncmp(tag_name, "HARDLINKCOUNT", 13)) 1192bfe86848SMiklos Szeredi set_nlink(inode, i_nlink); 11935717144aSAneesh Kumar K.V } 11945717144aSAneesh Kumar K.V } 1195df345c67SAneesh Kumar K.V mode = p9mode2perm(v9ses, stat); 119645089142SAneesh Kumar K.V mode |= inode->i_mode & ~S_IALLUGO; 119745089142SAneesh Kumar K.V inode->i_mode = mode; 11987549ae3eSAbhishek Kulkarni i_size_write(inode, stat->length); 11992bad8471SEric Van Hensbergen 1200bd238fb4SLatchesar Ionkov /* not real number of blocks, but 512 byte ones ... */ 12017549ae3eSAbhishek Kulkarni inode->i_blocks = (i_size_read(inode) + 512 - 1) >> 9; 1202b3cbea03SAneesh Kumar K.V v9inode->cache_validity &= ~V9FS_INO_INVALID_ATTR; 12032bad8471SEric Van Hensbergen } 12042bad8471SEric Van Hensbergen 12052bad8471SEric Van Hensbergen /** 12062bad8471SEric Van Hensbergen * v9fs_qid2ino - convert qid into inode number 12072bad8471SEric Van Hensbergen * @qid: qid to hash 12082bad8471SEric Van Hensbergen * 12092bad8471SEric Van Hensbergen * BUG: potential for inode number collisions? 12102bad8471SEric Van Hensbergen */ 12112bad8471SEric Van Hensbergen 1212bd238fb4SLatchesar Ionkov ino_t v9fs_qid2ino(struct p9_qid *qid) 12132bad8471SEric Van Hensbergen { 12142bad8471SEric Van Hensbergen u64 path = qid->path + 2; 12152bad8471SEric Van Hensbergen ino_t i = 0; 12162bad8471SEric Van Hensbergen 12172bad8471SEric Van Hensbergen if (sizeof(ino_t) == sizeof(path)) 12182bad8471SEric Van Hensbergen memcpy(&i, &path, sizeof(ino_t)); 12192bad8471SEric Van Hensbergen else 12202bad8471SEric Van Hensbergen i = (ino_t) (path ^ (path >> 32)); 12212bad8471SEric Van Hensbergen 12222bad8471SEric Van Hensbergen return i; 12232bad8471SEric Van Hensbergen } 12242bad8471SEric Van Hensbergen 12252bad8471SEric Van Hensbergen /** 12262bad8471SEric Van Hensbergen * v9fs_vfs_follow_link - follow a symlink path 12272bad8471SEric Van Hensbergen * @dentry: dentry for symlink 122889076bc3SAl Viro * @cookie: place to pass the data to put_link() 12292bad8471SEric Van Hensbergen */ 12302bad8471SEric Van Hensbergen 12316e77137bSAl Viro static const char *v9fs_vfs_follow_link(struct dentry *dentry, void **cookie) 12322bad8471SEric Van Hensbergen { 123390e4fc88SAl Viro struct v9fs_session_info *v9ses = v9fs_dentry2v9ses(dentry); 123490e4fc88SAl Viro struct p9_fid *fid = v9fs_fid_lookup(dentry); 123590e4fc88SAl Viro struct p9_wstat *st; 1236680baacbSAl Viro char *res; 12372bad8471SEric Van Hensbergen 12384b8e9923SAl Viro p9_debug(P9_DEBUG_VFS, "%pd\n", dentry); 12392bad8471SEric Van Hensbergen 124090e4fc88SAl Viro if (IS_ERR(fid)) 124190e4fc88SAl Viro return ERR_CAST(fid); 12422bad8471SEric Van Hensbergen 124390e4fc88SAl Viro if (!v9fs_proto_dotu(v9ses)) 124490e4fc88SAl Viro return ERR_PTR(-EBADF); 124590e4fc88SAl Viro 124690e4fc88SAl Viro st = p9_client_stat(fid); 124790e4fc88SAl Viro if (IS_ERR(st)) 124890e4fc88SAl Viro return ERR_CAST(st); 124990e4fc88SAl Viro 125090e4fc88SAl Viro if (!(st->mode & P9_DMSYMLINK)) { 125190e4fc88SAl Viro p9stat_free(st); 125290e4fc88SAl Viro kfree(st); 125390e4fc88SAl Viro return ERR_PTR(-EINVAL); 12542bad8471SEric Van Hensbergen } 1255680baacbSAl Viro res = st->extension; 125690e4fc88SAl Viro st->extension = NULL; 1257680baacbSAl Viro if (strlen(res) >= PATH_MAX) 1258680baacbSAl Viro res[PATH_MAX - 1] = '\0'; 1259680baacbSAl Viro 126090e4fc88SAl Viro p9stat_free(st); 126190e4fc88SAl Viro kfree(st); 1262680baacbSAl Viro return *cookie = res; 12632bad8471SEric Van Hensbergen } 12642bad8471SEric Van Hensbergen 12652bad8471SEric Van Hensbergen /** 1266ee443996SEric Van Hensbergen * v9fs_vfs_mkspecial - create a special file 1267ee443996SEric Van Hensbergen * @dir: inode to create special file in 1268ee443996SEric Van Hensbergen * @dentry: dentry to create 1269fd2916bdSFabian Frederick * @perm: mode to create special file 1270ee443996SEric Van Hensbergen * @extension: 9p2000.u format extension string representing special file 1271ee443996SEric Van Hensbergen * 1272ee443996SEric Van Hensbergen */ 1273ee443996SEric Van Hensbergen 1274531b1094SLatchesar Ionkov static int v9fs_vfs_mkspecial(struct inode *dir, struct dentry *dentry, 1275c2837de7SAl Viro u32 perm, const char *extension) 1276531b1094SLatchesar Ionkov { 1277bd238fb4SLatchesar Ionkov struct p9_fid *fid; 1278d28c61f0SAneesh Kumar K.V struct v9fs_session_info *v9ses; 1279531b1094SLatchesar Ionkov 12806a3124a3SLatchesar Ionkov v9ses = v9fs_inode2v9ses(dir); 1281dd6102fbSSripathi Kodi if (!v9fs_proto_dotu(v9ses)) { 12825d385153SJoe Perches p9_debug(P9_DEBUG_ERROR, "not extended\n"); 12836a3124a3SLatchesar Ionkov return -EPERM; 1284531b1094SLatchesar Ionkov } 1285531b1094SLatchesar Ionkov 1286bd238fb4SLatchesar Ionkov fid = v9fs_create(v9ses, dir, dentry, (char *) extension, perm, 1287bd238fb4SLatchesar Ionkov P9_OREAD); 1288bd238fb4SLatchesar Ionkov if (IS_ERR(fid)) 1289bd238fb4SLatchesar Ionkov return PTR_ERR(fid); 1290da977b2cSEric Van Hensbergen 1291d28c61f0SAneesh Kumar K.V v9fs_invalidate_inode_attr(dir); 1292bd238fb4SLatchesar Ionkov p9_client_clunk(fid); 12936a3124a3SLatchesar Ionkov return 0; 1294531b1094SLatchesar Ionkov } 1295531b1094SLatchesar Ionkov 1296531b1094SLatchesar Ionkov /** 1297531b1094SLatchesar Ionkov * v9fs_vfs_symlink - helper function to create symlinks 1298531b1094SLatchesar Ionkov * @dir: directory inode containing symlink 1299531b1094SLatchesar Ionkov * @dentry: dentry for symlink 1300531b1094SLatchesar Ionkov * @symname: symlink data 1301531b1094SLatchesar Ionkov * 1302ee443996SEric Van Hensbergen * See Also: 9P2000.u RFC for more information 1303531b1094SLatchesar Ionkov * 1304531b1094SLatchesar Ionkov */ 1305531b1094SLatchesar Ionkov 1306531b1094SLatchesar Ionkov static int 1307531b1094SLatchesar Ionkov v9fs_vfs_symlink(struct inode *dir, struct dentry *dentry, const char *symname) 1308531b1094SLatchesar Ionkov { 13094b8e9923SAl Viro p9_debug(P9_DEBUG_VFS, " %lu,%pd,%s\n", 13104b8e9923SAl Viro dir->i_ino, dentry, symname); 1311531b1094SLatchesar Ionkov 1312c2837de7SAl Viro return v9fs_vfs_mkspecial(dir, dentry, P9_DMSYMLINK, symname); 1313531b1094SLatchesar Ionkov } 1314531b1094SLatchesar Ionkov 1315b46c267eSAl Viro #define U32_MAX_DIGITS 10 1316b46c267eSAl Viro 13172bad8471SEric Van Hensbergen /** 13182bad8471SEric Van Hensbergen * v9fs_vfs_link - create a hardlink 13192bad8471SEric Van Hensbergen * @old_dentry: dentry for file to link to 13202bad8471SEric Van Hensbergen * @dir: inode destination for new link 132173c592b9SEric Van Hensbergen * @dentry: dentry for link 13222bad8471SEric Van Hensbergen * 13232bad8471SEric Van Hensbergen */ 13242bad8471SEric Van Hensbergen 13252bad8471SEric Van Hensbergen static int 13262bad8471SEric Van Hensbergen v9fs_vfs_link(struct dentry *old_dentry, struct inode *dir, 13272bad8471SEric Van Hensbergen struct dentry *dentry) 13282bad8471SEric Van Hensbergen { 1329531b1094SLatchesar Ionkov int retval; 1330b46c267eSAl Viro char name[1 + U32_MAX_DIGITS + 2]; /* sign + number + \n + \0 */ 1331d28c61f0SAneesh Kumar K.V struct p9_fid *oldfid; 13322bad8471SEric Van Hensbergen 13334b8e9923SAl Viro p9_debug(P9_DEBUG_VFS, " %lu,%pd,%pd\n", 13344b8e9923SAl Viro dir->i_ino, dentry, old_dentry); 13352bad8471SEric Van Hensbergen 1336da977b2cSEric Van Hensbergen oldfid = v9fs_fid_clone(old_dentry); 1337da977b2cSEric Van Hensbergen if (IS_ERR(oldfid)) 1338da977b2cSEric Van Hensbergen return PTR_ERR(oldfid); 13392bad8471SEric Van Hensbergen 134016cce6d2SLatchesar Ionkov sprintf(name, "%d\n", oldfid->fid); 1341bd238fb4SLatchesar Ionkov retval = v9fs_vfs_mkspecial(dir, dentry, P9_DMLINK, name); 1342c06c066aSAneesh Kumar K.V if (!retval) { 13432b0143b5SDavid Howells v9fs_refresh_inode(oldfid, d_inode(old_dentry)); 1344d28c61f0SAneesh Kumar K.V v9fs_invalidate_inode_attr(dir); 1345c06c066aSAneesh Kumar K.V } 1346bd238fb4SLatchesar Ionkov p9_client_clunk(oldfid); 13472bad8471SEric Van Hensbergen return retval; 13482bad8471SEric Van Hensbergen } 13492bad8471SEric Van Hensbergen 13502bad8471SEric Van Hensbergen /** 13512bad8471SEric Van Hensbergen * v9fs_vfs_mknod - create a special file 13522bad8471SEric Van Hensbergen * @dir: inode destination for new link 13532bad8471SEric Van Hensbergen * @dentry: dentry for file 13542bad8471SEric Van Hensbergen * @mode: mode for creation 1355ee443996SEric Van Hensbergen * @rdev: device associated with special file 13562bad8471SEric Van Hensbergen * 13572bad8471SEric Van Hensbergen */ 13582bad8471SEric Van Hensbergen 13592bad8471SEric Van Hensbergen static int 13601a67aafbSAl Viro v9fs_vfs_mknod(struct inode *dir, struct dentry *dentry, umode_t mode, dev_t rdev) 13612bad8471SEric Van Hensbergen { 1362c2837de7SAl Viro struct v9fs_session_info *v9ses = v9fs_inode2v9ses(dir); 1363531b1094SLatchesar Ionkov int retval; 1364b46c267eSAl Viro char name[2 + U32_MAX_DIGITS + 1 + U32_MAX_DIGITS + 1]; 1365c2837de7SAl Viro u32 perm; 13662bad8471SEric Van Hensbergen 13674b8e9923SAl Viro p9_debug(P9_DEBUG_VFS, " %lu,%pd mode: %hx MAJOR: %u MINOR: %u\n", 13684b8e9923SAl Viro dir->i_ino, dentry, mode, 13695d385153SJoe Perches MAJOR(rdev), MINOR(rdev)); 13702bad8471SEric Van Hensbergen 1371531b1094SLatchesar Ionkov if (!new_valid_dev(rdev)) 1372531b1094SLatchesar Ionkov return -EINVAL; 137373c592b9SEric Van Hensbergen 13742bad8471SEric Van Hensbergen /* build extension */ 13752bad8471SEric Van Hensbergen if (S_ISBLK(mode)) 1376531b1094SLatchesar Ionkov sprintf(name, "b %u %u", MAJOR(rdev), MINOR(rdev)); 13772bad8471SEric Van Hensbergen else if (S_ISCHR(mode)) 1378531b1094SLatchesar Ionkov sprintf(name, "c %u %u", MAJOR(rdev), MINOR(rdev)); 1379b46c267eSAl Viro else 1380531b1094SLatchesar Ionkov *name = 0; 13812bad8471SEric Van Hensbergen 1382c2837de7SAl Viro perm = unixmode2p9mode(v9ses, mode); 1383c2837de7SAl Viro retval = v9fs_vfs_mkspecial(dir, dentry, perm, name); 13842bad8471SEric Van Hensbergen 13852bad8471SEric Van Hensbergen return retval; 13862bad8471SEric Van Hensbergen } 13872bad8471SEric Van Hensbergen 1388b3cbea03SAneesh Kumar K.V int v9fs_refresh_inode(struct p9_fid *fid, struct inode *inode) 1389b3cbea03SAneesh Kumar K.V { 139045089142SAneesh Kumar K.V int umode; 139145089142SAneesh Kumar K.V dev_t rdev; 1392b3cbea03SAneesh Kumar K.V loff_t i_size; 1393b3cbea03SAneesh Kumar K.V struct p9_wstat *st; 1394b3cbea03SAneesh Kumar K.V struct v9fs_session_info *v9ses; 1395b3cbea03SAneesh Kumar K.V 1396b3cbea03SAneesh Kumar K.V v9ses = v9fs_inode2v9ses(inode); 1397b3cbea03SAneesh Kumar K.V st = p9_client_stat(fid); 1398b3cbea03SAneesh Kumar K.V if (IS_ERR(st)) 1399b3cbea03SAneesh Kumar K.V return PTR_ERR(st); 140045089142SAneesh Kumar K.V /* 140145089142SAneesh Kumar K.V * Don't update inode if the file type is different 140245089142SAneesh Kumar K.V */ 140345089142SAneesh Kumar K.V umode = p9mode2unixmode(v9ses, st, &rdev); 140445089142SAneesh Kumar K.V if ((inode->i_mode & S_IFMT) != (umode & S_IFMT)) 140545089142SAneesh Kumar K.V goto out; 1406b3cbea03SAneesh Kumar K.V 1407b3cbea03SAneesh Kumar K.V spin_lock(&inode->i_lock); 1408b3cbea03SAneesh Kumar K.V /* 1409b3cbea03SAneesh Kumar K.V * We don't want to refresh inode->i_size, 1410b3cbea03SAneesh Kumar K.V * because we may have cached data 1411b3cbea03SAneesh Kumar K.V */ 1412b3cbea03SAneesh Kumar K.V i_size = inode->i_size; 1413b3cbea03SAneesh Kumar K.V v9fs_stat2inode(st, inode, inode->i_sb); 1414fb89b45cSDominique Martinet if (v9ses->cache == CACHE_LOOSE || v9ses->cache == CACHE_FSCACHE) 1415b3cbea03SAneesh Kumar K.V inode->i_size = i_size; 1416b3cbea03SAneesh Kumar K.V spin_unlock(&inode->i_lock); 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 = { 1457204f2f0eSAl Viro .readlink = generic_readlink, 14582bad8471SEric Van Hensbergen .follow_link = v9fs_vfs_follow_link, 145990e4fc88SAl Viro .put_link = kfree_put_link, 14602bad8471SEric Van Hensbergen .getattr = v9fs_vfs_getattr, 14612bad8471SEric Van Hensbergen .setattr = v9fs_vfs_setattr, 14622bad8471SEric Van Hensbergen }; 14639b6533c9SSripathi Kodi 1464