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; 2478f5fed1eSSasha Levin mutex_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 /** 2565e8a0770SAl Viro * v9fs_free_inode - destroy an inode 25760e78d2cSAbhishek Kulkarni * 25860e78d2cSAbhishek Kulkarni */ 25960e78d2cSAbhishek Kulkarni 2605e8a0770SAl Viro void v9fs_free_inode(struct inode *inode) 261fa0d7e3dSNick Piggin { 262a78ce05dSAneesh Kumar K.V kmem_cache_free(v9fs_inode_cache, V9FS_I(inode)); 263fa0d7e3dSNick Piggin } 264fa0d7e3dSNick Piggin 2655ffc0cb3SAneesh Kumar K.V int v9fs_init_inode(struct v9fs_session_info *v9ses, 2663eda0de6SAl Viro struct inode *inode, umode_t mode, dev_t rdev) 2672bad8471SEric Van Hensbergen { 2685ffc0cb3SAneesh Kumar K.V int err = 0; 2692bb54115SAbhishek Kulkarni 270217f206dSDmitry Monakhov inode_init_owner(inode, NULL, mode); 2712bad8471SEric Van Hensbergen inode->i_blocks = 0; 27245089142SAneesh Kumar K.V inode->i_rdev = rdev; 273078cd827SDeepa Dinamani inode->i_atime = inode->i_mtime = inode->i_ctime = current_time(inode); 274147b31cfSEric Van Hensbergen inode->i_mapping->a_ops = &v9fs_addr_operations; 2752bad8471SEric Van Hensbergen 2762bad8471SEric Van Hensbergen switch (mode & S_IFMT) { 2772bad8471SEric Van Hensbergen case S_IFIFO: 2782bad8471SEric Van Hensbergen case S_IFBLK: 2792bad8471SEric Van Hensbergen case S_IFCHR: 2802bad8471SEric Van Hensbergen case S_IFSOCK: 2814b43516aSM. Mohan Kumar if (v9fs_proto_dotl(v9ses)) { 2824b43516aSM. Mohan Kumar inode->i_op = &v9fs_file_inode_operations_dotl; 2834b43516aSM. Mohan Kumar } else if (v9fs_proto_dotu(v9ses)) { 2844b43516aSM. Mohan Kumar inode->i_op = &v9fs_file_inode_operations; 2854b43516aSM. Mohan Kumar } else { 2865d385153SJoe Perches p9_debug(P9_DEBUG_ERROR, 287bd238fb4SLatchesar Ionkov "special files without extended mode\n"); 2882bb54115SAbhishek Kulkarni err = -EINVAL; 2892bb54115SAbhishek Kulkarni goto error; 290b501611aSEric Van Hensbergen } 2912bb54115SAbhishek Kulkarni init_special_inode(inode, inode->i_mode, inode->i_rdev); 2925d58bec5SEric Van Hensbergen break; 2932bad8471SEric Van Hensbergen case S_IFREG: 2949b6533c9SSripathi Kodi if (v9fs_proto_dotl(v9ses)) { 2959b6533c9SSripathi Kodi inode->i_op = &v9fs_file_inode_operations_dotl; 296fb89b45cSDominique Martinet if (v9ses->cache == CACHE_LOOSE || 297fb89b45cSDominique Martinet v9ses->cache == CACHE_FSCACHE) 29829236f4eSAneesh Kumar K.V inode->i_fop = 29929236f4eSAneesh Kumar K.V &v9fs_cached_file_operations_dotl; 300fb89b45cSDominique Martinet else if (v9ses->cache == CACHE_MMAP) 301fb89b45cSDominique Martinet inode->i_fop = &v9fs_mmap_file_operations_dotl; 30229236f4eSAneesh Kumar K.V else 3039b6533c9SSripathi Kodi inode->i_fop = &v9fs_file_operations_dotl; 3049b6533c9SSripathi Kodi } else { 3052bad8471SEric Van Hensbergen inode->i_op = &v9fs_file_inode_operations; 306fb89b45cSDominique Martinet if (v9ses->cache == CACHE_LOOSE || 307fb89b45cSDominique Martinet v9ses->cache == CACHE_FSCACHE) 308fb89b45cSDominique Martinet inode->i_fop = 309fb89b45cSDominique Martinet &v9fs_cached_file_operations; 310fb89b45cSDominique Martinet else if (v9ses->cache == CACHE_MMAP) 311fb89b45cSDominique Martinet inode->i_fop = &v9fs_mmap_file_operations; 31229236f4eSAneesh Kumar K.V else 3132bad8471SEric Van Hensbergen inode->i_fop = &v9fs_file_operations; 3149b6533c9SSripathi Kodi } 3159b6533c9SSripathi Kodi 3162bad8471SEric Van Hensbergen break; 317b501611aSEric Van Hensbergen case S_IFLNK: 3189b6533c9SSripathi Kodi if (!v9fs_proto_dotu(v9ses) && !v9fs_proto_dotl(v9ses)) { 3195d385153SJoe Perches p9_debug(P9_DEBUG_ERROR, 3205d385153SJoe Perches "extended modes used with legacy protocol\n"); 3212bb54115SAbhishek Kulkarni err = -EINVAL; 3222bb54115SAbhishek Kulkarni goto error; 323b501611aSEric Van Hensbergen } 3249b6533c9SSripathi Kodi 3259b6533c9SSripathi Kodi if (v9fs_proto_dotl(v9ses)) 3269b6533c9SSripathi Kodi inode->i_op = &v9fs_symlink_inode_operations_dotl; 3279b6533c9SSripathi Kodi else 328b501611aSEric Van Hensbergen inode->i_op = &v9fs_symlink_inode_operations; 3299b6533c9SSripathi Kodi 330b501611aSEric Van Hensbergen break; 3312bad8471SEric Van Hensbergen case S_IFDIR: 332d8c76e6fSDave Hansen inc_nlink(inode); 3339b6533c9SSripathi Kodi if (v9fs_proto_dotl(v9ses)) 3349b6533c9SSripathi Kodi inode->i_op = &v9fs_dir_inode_operations_dotl; 3359b6533c9SSripathi Kodi else if (v9fs_proto_dotu(v9ses)) 3369b6533c9SSripathi Kodi inode->i_op = &v9fs_dir_inode_operations_dotu; 337b501611aSEric Van Hensbergen else 3382bad8471SEric Van Hensbergen inode->i_op = &v9fs_dir_inode_operations; 3399b6533c9SSripathi Kodi 3409b6533c9SSripathi Kodi if (v9fs_proto_dotl(v9ses)) 3419b6533c9SSripathi Kodi inode->i_fop = &v9fs_dir_operations_dotl; 3429b6533c9SSripathi Kodi else 3432bad8471SEric Van Hensbergen inode->i_fop = &v9fs_dir_operations; 3449b6533c9SSripathi Kodi 3452bad8471SEric Van Hensbergen break; 3462bad8471SEric Van Hensbergen default: 347609eac1cSLinus Torvalds p9_debug(P9_DEBUG_ERROR, "BAD mode 0x%hx S_IFMT 0x%x\n", 3482bad8471SEric Van Hensbergen mode, mode & S_IFMT); 3492bb54115SAbhishek Kulkarni err = -EINVAL; 3502bb54115SAbhishek Kulkarni goto error; 3512bad8471SEric Van Hensbergen } 3522bb54115SAbhishek Kulkarni error: 3535ffc0cb3SAneesh Kumar K.V return err; 3545ffc0cb3SAneesh Kumar K.V 3555ffc0cb3SAneesh Kumar K.V } 3565ffc0cb3SAneesh Kumar K.V 3575ffc0cb3SAneesh Kumar K.V /** 3585ffc0cb3SAneesh Kumar K.V * v9fs_get_inode - helper function to setup an inode 3595ffc0cb3SAneesh Kumar K.V * @sb: superblock 3605ffc0cb3SAneesh Kumar K.V * @mode: mode to setup inode with 3615ffc0cb3SAneesh Kumar K.V * 3625ffc0cb3SAneesh Kumar K.V */ 3635ffc0cb3SAneesh Kumar K.V 3643eda0de6SAl Viro struct inode *v9fs_get_inode(struct super_block *sb, umode_t mode, dev_t rdev) 3655ffc0cb3SAneesh Kumar K.V { 3665ffc0cb3SAneesh Kumar K.V int err; 3675ffc0cb3SAneesh Kumar K.V struct inode *inode; 3685ffc0cb3SAneesh Kumar K.V struct v9fs_session_info *v9ses = sb->s_fs_info; 3695ffc0cb3SAneesh Kumar K.V 370609eac1cSLinus Torvalds p9_debug(P9_DEBUG_VFS, "super block: %p mode: %ho\n", sb, mode); 3715ffc0cb3SAneesh Kumar K.V 3725ffc0cb3SAneesh Kumar K.V inode = new_inode(sb); 3735ffc0cb3SAneesh Kumar K.V if (!inode) { 3745d385153SJoe Perches pr_warn("%s (%d): Problem allocating inode\n", 3755d385153SJoe Perches __func__, task_pid_nr(current)); 3765ffc0cb3SAneesh Kumar K.V return ERR_PTR(-ENOMEM); 3775ffc0cb3SAneesh Kumar K.V } 37845089142SAneesh Kumar K.V err = v9fs_init_inode(v9ses, inode, mode, rdev); 3795ffc0cb3SAneesh Kumar K.V if (err) { 3802bb54115SAbhishek Kulkarni iput(inode); 3812bb54115SAbhishek Kulkarni return ERR_PTR(err); 3822bad8471SEric Van Hensbergen } 3835ffc0cb3SAneesh Kumar K.V return inode; 3845ffc0cb3SAneesh Kumar K.V } 3852bad8471SEric Van Hensbergen 386bd238fb4SLatchesar Ionkov /* 3876a3124a3SLatchesar Ionkov static struct v9fs_fid* 3886a3124a3SLatchesar Ionkov v9fs_clone_walk(struct v9fs_session_info *v9ses, u32 fid, struct dentry *dentry) 3896a3124a3SLatchesar Ionkov { 3906a3124a3SLatchesar Ionkov int err; 391736c4b85SMika Kukkonen int nfid; 3926a3124a3SLatchesar Ionkov struct v9fs_fid *ret; 3936a3124a3SLatchesar Ionkov struct v9fs_fcall *fcall; 3940b8dd177SLatchesar Ionkov 3956a3124a3SLatchesar Ionkov nfid = v9fs_get_idpool(&v9ses->fidpool); 3966a3124a3SLatchesar Ionkov if (nfid < 0) { 3970b8dd177SLatchesar Ionkov eprintk(KERN_WARNING, "no free fids available\n"); 398731805b4SLatchesar Ionkov return ERR_PTR(-ENOSPC); 3990b8dd177SLatchesar Ionkov } 4000b8dd177SLatchesar Ionkov 4016a3124a3SLatchesar Ionkov err = v9fs_t_walk(v9ses, fid, nfid, (char *) dentry->d_name.name, 4026a3124a3SLatchesar Ionkov &fcall); 4036a3124a3SLatchesar Ionkov 4046a3124a3SLatchesar Ionkov if (err < 0) { 40541e5a6acSLatchesar Ionkov if (fcall && fcall->id == RWALK) 40641e5a6acSLatchesar Ionkov goto clunk_fid; 40741e5a6acSLatchesar Ionkov 4086a3124a3SLatchesar Ionkov PRINT_FCALL_ERROR("walk error", fcall); 4096a3124a3SLatchesar Ionkov v9fs_put_idpool(nfid, &v9ses->fidpool); 4106a3124a3SLatchesar Ionkov goto error; 4110b8dd177SLatchesar Ionkov } 4126a3124a3SLatchesar Ionkov 4133cf6429aSLatchesar Ionkov kfree(fcall); 4143cf6429aSLatchesar Ionkov fcall = NULL; 4156a3124a3SLatchesar Ionkov ret = v9fs_fid_create(v9ses, nfid); 4166a3124a3SLatchesar Ionkov if (!ret) { 4176a3124a3SLatchesar Ionkov err = -ENOMEM; 4186a3124a3SLatchesar Ionkov goto clunk_fid; 4190b8dd177SLatchesar Ionkov } 4202bad8471SEric Van Hensbergen 4216a3124a3SLatchesar Ionkov err = v9fs_fid_insert(ret, dentry); 4226a3124a3SLatchesar Ionkov if (err < 0) { 4236a3124a3SLatchesar Ionkov v9fs_fid_destroy(ret); 4246a3124a3SLatchesar Ionkov goto clunk_fid; 4256a3124a3SLatchesar Ionkov } 4262bad8471SEric Van Hensbergen 4276a3124a3SLatchesar Ionkov return ret; 4286a3124a3SLatchesar Ionkov 4296a3124a3SLatchesar Ionkov clunk_fid: 4306a3124a3SLatchesar Ionkov v9fs_t_clunk(v9ses, nfid); 4316a3124a3SLatchesar Ionkov 4326a3124a3SLatchesar Ionkov error: 4336a3124a3SLatchesar Ionkov kfree(fcall); 4346a3124a3SLatchesar Ionkov return ERR_PTR(err); 4356a3124a3SLatchesar Ionkov } 436bd238fb4SLatchesar Ionkov */ 4376a3124a3SLatchesar Ionkov 43860e78d2cSAbhishek Kulkarni 43960e78d2cSAbhishek Kulkarni /** 44060e78d2cSAbhishek Kulkarni * v9fs_clear_inode - release an inode 44160e78d2cSAbhishek Kulkarni * @inode: inode to release 44260e78d2cSAbhishek Kulkarni * 44360e78d2cSAbhishek Kulkarni */ 444b57922d9SAl Viro void v9fs_evict_inode(struct inode *inode) 44560e78d2cSAbhishek Kulkarni { 4466b39f6d2SAneesh Kumar K.V struct v9fs_inode *v9inode = V9FS_I(inode); 4476b39f6d2SAneesh Kumar K.V 4484ad78628SAl Viro truncate_inode_pages_final(&inode->i_data); 449dbd5768fSJan Kara clear_inode(inode); 4504ad78628SAl Viro filemap_fdatawrite(&inode->i_data); 45160e78d2cSAbhishek Kulkarni 45260e78d2cSAbhishek Kulkarni v9fs_cache_inode_put_cookie(inode); 4536b39f6d2SAneesh Kumar K.V /* clunk the fid stashed in writeback_fid */ 4546b39f6d2SAneesh Kumar K.V if (v9inode->writeback_fid) { 4556b39f6d2SAneesh Kumar K.V p9_client_clunk(v9inode->writeback_fid); 4566b39f6d2SAneesh Kumar K.V v9inode->writeback_fid = NULL; 4573cf387d7SAneesh Kumar K.V } 45860e78d2cSAbhishek Kulkarni } 45960e78d2cSAbhishek Kulkarni 460fd2421f5SAneesh Kumar K.V static int v9fs_test_inode(struct inode *inode, void *data) 461fd2421f5SAneesh Kumar K.V { 462fd2421f5SAneesh Kumar K.V int umode; 46345089142SAneesh Kumar K.V dev_t rdev; 464fd2421f5SAneesh Kumar K.V struct v9fs_inode *v9inode = V9FS_I(inode); 465fd2421f5SAneesh Kumar K.V struct p9_wstat *st = (struct p9_wstat *)data; 466fd2421f5SAneesh Kumar K.V struct v9fs_session_info *v9ses = v9fs_inode2v9ses(inode); 467fd2421f5SAneesh Kumar K.V 46845089142SAneesh Kumar K.V umode = p9mode2unixmode(v9ses, st, &rdev); 469fd2421f5SAneesh Kumar K.V /* don't match inode of different type */ 470fd2421f5SAneesh Kumar K.V if ((inode->i_mode & S_IFMT) != (umode & S_IFMT)) 471fd2421f5SAneesh Kumar K.V return 0; 472fd2421f5SAneesh Kumar K.V 473fd2421f5SAneesh Kumar K.V /* compare qid details */ 474fd2421f5SAneesh Kumar K.V if (memcmp(&v9inode->qid.version, 475fd2421f5SAneesh Kumar K.V &st->qid.version, sizeof(v9inode->qid.version))) 476fd2421f5SAneesh Kumar K.V return 0; 477fd2421f5SAneesh Kumar K.V 478fd2421f5SAneesh Kumar K.V if (v9inode->qid.type != st->qid.type) 479fd2421f5SAneesh Kumar K.V return 0; 4808ee03163STuomas Tynkkynen 4818ee03163STuomas Tynkkynen if (v9inode->qid.path != st->qid.path) 4828ee03163STuomas Tynkkynen return 0; 483fd2421f5SAneesh Kumar K.V return 1; 484fd2421f5SAneesh Kumar K.V } 485fd2421f5SAneesh Kumar K.V 486ed80fcfaSAneesh Kumar K.V static int v9fs_test_new_inode(struct inode *inode, void *data) 487ed80fcfaSAneesh Kumar K.V { 488ed80fcfaSAneesh Kumar K.V return 0; 489ed80fcfaSAneesh Kumar K.V } 490ed80fcfaSAneesh Kumar K.V 491fd2421f5SAneesh Kumar K.V static int v9fs_set_inode(struct inode *inode, void *data) 492fd2421f5SAneesh Kumar K.V { 493fd2421f5SAneesh Kumar K.V struct v9fs_inode *v9inode = V9FS_I(inode); 494fd2421f5SAneesh Kumar K.V struct p9_wstat *st = (struct p9_wstat *)data; 495fd2421f5SAneesh Kumar K.V 496fd2421f5SAneesh Kumar K.V memcpy(&v9inode->qid, &st->qid, sizeof(st->qid)); 497fd2421f5SAneesh Kumar K.V return 0; 498fd2421f5SAneesh Kumar K.V } 499fd2421f5SAneesh Kumar K.V 5005ffc0cb3SAneesh Kumar K.V static struct inode *v9fs_qid_iget(struct super_block *sb, 5015ffc0cb3SAneesh Kumar K.V struct p9_qid *qid, 502ed80fcfaSAneesh Kumar K.V struct p9_wstat *st, 503ed80fcfaSAneesh Kumar K.V int new) 5045ffc0cb3SAneesh Kumar K.V { 50545089142SAneesh Kumar K.V dev_t rdev; 5063eda0de6SAl Viro int retval; 5073eda0de6SAl Viro umode_t umode; 5085ffc0cb3SAneesh Kumar K.V unsigned long i_ino; 5095ffc0cb3SAneesh Kumar K.V struct inode *inode; 5105ffc0cb3SAneesh Kumar K.V struct v9fs_session_info *v9ses = sb->s_fs_info; 511ed80fcfaSAneesh Kumar K.V int (*test)(struct inode *, void *); 512ed80fcfaSAneesh Kumar K.V 513ed80fcfaSAneesh Kumar K.V if (new) 514ed80fcfaSAneesh Kumar K.V test = v9fs_test_new_inode; 515ed80fcfaSAneesh Kumar K.V else 516ed80fcfaSAneesh Kumar K.V test = v9fs_test_inode; 5175ffc0cb3SAneesh Kumar K.V 5185ffc0cb3SAneesh Kumar K.V i_ino = v9fs_qid2ino(qid); 519ed80fcfaSAneesh Kumar K.V inode = iget5_locked(sb, i_ino, test, v9fs_set_inode, st); 5205ffc0cb3SAneesh Kumar K.V if (!inode) 5215ffc0cb3SAneesh Kumar K.V return ERR_PTR(-ENOMEM); 5225ffc0cb3SAneesh Kumar K.V if (!(inode->i_state & I_NEW)) 5235ffc0cb3SAneesh Kumar K.V return inode; 5245ffc0cb3SAneesh Kumar K.V /* 5255ffc0cb3SAneesh Kumar K.V * initialize the inode with the stat info 5265ffc0cb3SAneesh Kumar K.V * FIXME!! we may need support for stale inodes 5275ffc0cb3SAneesh Kumar K.V * later. 5285ffc0cb3SAneesh Kumar K.V */ 529fd2421f5SAneesh Kumar K.V inode->i_ino = i_ino; 53045089142SAneesh Kumar K.V umode = p9mode2unixmode(v9ses, st, &rdev); 53145089142SAneesh Kumar K.V retval = v9fs_init_inode(v9ses, inode, umode, rdev); 5325ffc0cb3SAneesh Kumar K.V if (retval) 5335ffc0cb3SAneesh Kumar K.V goto error; 5345ffc0cb3SAneesh Kumar K.V 5355e3cc1eeSHou Tao v9fs_stat2inode(st, inode, sb, 0); 5365ffc0cb3SAneesh Kumar K.V v9fs_cache_inode_get_cookie(inode); 5375ffc0cb3SAneesh Kumar K.V unlock_new_inode(inode); 5385ffc0cb3SAneesh Kumar K.V return inode; 5395ffc0cb3SAneesh Kumar K.V error: 5400a73d0a2SAl Viro iget_failed(inode); 5415ffc0cb3SAneesh Kumar K.V return ERR_PTR(retval); 5425ffc0cb3SAneesh Kumar K.V 5435ffc0cb3SAneesh Kumar K.V } 5445ffc0cb3SAneesh Kumar K.V 54553c06f4eSAneesh Kumar K.V struct inode * 546a78ce05dSAneesh Kumar K.V v9fs_inode_from_fid(struct v9fs_session_info *v9ses, struct p9_fid *fid, 547ed80fcfaSAneesh Kumar K.V struct super_block *sb, int new) 5486a3124a3SLatchesar Ionkov { 54951a87c55SEric Van Hensbergen struct p9_wstat *st; 5505ffc0cb3SAneesh Kumar K.V struct inode *inode = NULL; 5516a3124a3SLatchesar Ionkov 552bd238fb4SLatchesar Ionkov st = p9_client_stat(fid); 55302bc3567SAbhishek Kulkarni if (IS_ERR(st)) 55402bc3567SAbhishek Kulkarni return ERR_CAST(st); 5552bad8471SEric Van Hensbergen 556ed80fcfaSAneesh Kumar K.V inode = v9fs_qid_iget(sb, &st->qid, st, new); 55702bc3567SAbhishek Kulkarni p9stat_free(st); 558bd238fb4SLatchesar Ionkov kfree(st); 5595ffc0cb3SAneesh Kumar K.V return inode; 5602bad8471SEric Van Hensbergen } 5612bad8471SEric Van Hensbergen 5622bad8471SEric Van Hensbergen /** 563f88657ceSAneesh Kumar K.V * v9fs_at_to_dotl_flags- convert Linux specific AT flags to 564f88657ceSAneesh Kumar K.V * plan 9 AT flag. 565f88657ceSAneesh Kumar K.V * @flags: flags to convert 566f88657ceSAneesh Kumar K.V */ 567f88657ceSAneesh Kumar K.V static int v9fs_at_to_dotl_flags(int flags) 568f88657ceSAneesh Kumar K.V { 569f88657ceSAneesh Kumar K.V int rflags = 0; 570f88657ceSAneesh Kumar K.V if (flags & AT_REMOVEDIR) 571f88657ceSAneesh Kumar K.V rflags |= P9_DOTL_AT_REMOVEDIR; 572f88657ceSAneesh Kumar K.V return rflags; 573f88657ceSAneesh Kumar K.V } 574f88657ceSAneesh Kumar K.V 575f88657ceSAneesh Kumar K.V /** 576ac89b2efSEryu Guan * v9fs_dec_count - helper functon to drop i_nlink. 577ac89b2efSEryu Guan * 578ac89b2efSEryu Guan * If a directory had nlink <= 2 (including . and ..), then we should not drop 579ac89b2efSEryu Guan * the link count, which indicates the underlying exported fs doesn't maintain 580ac89b2efSEryu Guan * nlink accurately. e.g. 581ac89b2efSEryu Guan * - overlayfs sets nlink to 1 for merged dir 582ac89b2efSEryu Guan * - ext4 (with dir_nlink feature enabled) sets nlink to 1 if a dir has more 583ac89b2efSEryu Guan * than EXT4_LINK_MAX (65000) links. 584ac89b2efSEryu Guan * 585ac89b2efSEryu Guan * @inode: inode whose nlink is being dropped 586ac89b2efSEryu Guan */ 587ac89b2efSEryu Guan static void v9fs_dec_count(struct inode *inode) 588ac89b2efSEryu Guan { 589ac89b2efSEryu Guan if (!S_ISDIR(inode->i_mode) || inode->i_nlink > 2) 590ac89b2efSEryu Guan drop_nlink(inode); 591ac89b2efSEryu Guan } 592ac89b2efSEryu Guan 593ac89b2efSEryu Guan /** 5942bad8471SEric Van Hensbergen * v9fs_remove - helper function to remove files and directories 59573c592b9SEric Van Hensbergen * @dir: directory inode that is being deleted 59648e370ffSAneesh Kumar K.V * @dentry: dentry that is being deleted 597fd2916bdSFabian Frederick * @flags: removing a directory 5982bad8471SEric Van Hensbergen * 5992bad8471SEric Van Hensbergen */ 6002bad8471SEric Van Hensbergen 60148e370ffSAneesh Kumar K.V static int v9fs_remove(struct inode *dir, struct dentry *dentry, int flags) 6022bad8471SEric Van Hensbergen { 60348e370ffSAneesh Kumar K.V struct inode *inode; 60448e370ffSAneesh Kumar K.V int retval = -EOPNOTSUPP; 60548e370ffSAneesh Kumar K.V struct p9_fid *v9fid, *dfid; 60648e370ffSAneesh Kumar K.V struct v9fs_session_info *v9ses; 6072bad8471SEric Van Hensbergen 6085d385153SJoe Perches p9_debug(P9_DEBUG_VFS, "inode: %p dentry: %p rmdir: %x\n", 60948e370ffSAneesh Kumar K.V dir, dentry, flags); 6102bad8471SEric Van Hensbergen 61148e370ffSAneesh Kumar K.V v9ses = v9fs_inode2v9ses(dir); 6122b0143b5SDavid Howells inode = d_inode(dentry); 61377d5a6b7SAl Viro dfid = v9fs_parent_fid(dentry); 61448e370ffSAneesh Kumar K.V if (IS_ERR(dfid)) { 61548e370ffSAneesh Kumar K.V retval = PTR_ERR(dfid); 6165d385153SJoe Perches p9_debug(P9_DEBUG_VFS, "fid lookup failed %d\n", retval); 61748e370ffSAneesh Kumar K.V return retval; 61848e370ffSAneesh Kumar K.V } 61948e370ffSAneesh Kumar K.V if (v9fs_proto_dotl(v9ses)) 620f88657ceSAneesh Kumar K.V retval = p9_client_unlinkat(dfid, dentry->d_name.name, 621f88657ceSAneesh Kumar K.V v9fs_at_to_dotl_flags(flags)); 62248e370ffSAneesh Kumar K.V if (retval == -EOPNOTSUPP) { 62348e370ffSAneesh Kumar K.V /* Try the one based on path */ 62448e370ffSAneesh Kumar K.V v9fid = v9fs_fid_clone(dentry); 625da977b2cSEric Van Hensbergen if (IS_ERR(v9fid)) 626da977b2cSEric Van Hensbergen return PTR_ERR(v9fid); 627d994f405SAneesh Kumar K.V retval = p9_client_remove(v9fid); 62848e370ffSAneesh Kumar K.V } 629b271ec47SAneesh Kumar K.V if (!retval) { 630b271ec47SAneesh Kumar K.V /* 631b271ec47SAneesh Kumar K.V * directories on unlink should have zero 632b271ec47SAneesh Kumar K.V * link count 633b271ec47SAneesh Kumar K.V */ 63448e370ffSAneesh Kumar K.V if (flags & AT_REMOVEDIR) { 63548e370ffSAneesh Kumar K.V clear_nlink(inode); 636ac89b2efSEryu Guan v9fs_dec_count(dir); 637b271ec47SAneesh Kumar K.V } else 638ac89b2efSEryu Guan v9fs_dec_count(inode); 639d28c61f0SAneesh Kumar K.V 64048e370ffSAneesh Kumar K.V v9fs_invalidate_inode_attr(inode); 641d28c61f0SAneesh Kumar K.V v9fs_invalidate_inode_attr(dir); 642b271ec47SAneesh Kumar K.V } 643d994f405SAneesh Kumar K.V return retval; 6442bad8471SEric Van Hensbergen } 6452bad8471SEric Van Hensbergen 646bd238fb4SLatchesar Ionkov /** 647bd238fb4SLatchesar Ionkov * v9fs_create - Create a file 648ee443996SEric Van Hensbergen * @v9ses: session information 649ee443996SEric Van Hensbergen * @dir: directory that dentry is being created in 650bd238fb4SLatchesar Ionkov * @dentry: dentry that is being created 6510e15597eSAbhishek Kulkarni * @extension: 9p2000.u extension string to support devices, etc. 652bd238fb4SLatchesar Ionkov * @perm: create permissions 653bd238fb4SLatchesar Ionkov * @mode: open mode 654bd238fb4SLatchesar Ionkov * 655bd238fb4SLatchesar Ionkov */ 656bd238fb4SLatchesar Ionkov static struct p9_fid * 657bd238fb4SLatchesar Ionkov v9fs_create(struct v9fs_session_info *v9ses, struct inode *dir, 658bd238fb4SLatchesar Ionkov struct dentry *dentry, char *extension, u32 perm, u8 mode) 659bd238fb4SLatchesar Ionkov { 660bd238fb4SLatchesar Ionkov int err; 6617880b43bSAl Viro const unsigned char *name; 662bd238fb4SLatchesar Ionkov struct p9_fid *dfid, *ofid, *fid; 663bd238fb4SLatchesar Ionkov struct inode *inode; 664bd238fb4SLatchesar Ionkov 6654b8e9923SAl Viro p9_debug(P9_DEBUG_VFS, "name %pd\n", dentry); 66651a87c55SEric Van Hensbergen 667bd238fb4SLatchesar Ionkov err = 0; 668bd238fb4SLatchesar Ionkov ofid = NULL; 669bd238fb4SLatchesar Ionkov fid = NULL; 6707880b43bSAl Viro name = dentry->d_name.name; 67177d5a6b7SAl Viro dfid = v9fs_parent_fid(dentry); 672bd238fb4SLatchesar Ionkov if (IS_ERR(dfid)) { 673bd238fb4SLatchesar Ionkov err = PTR_ERR(dfid); 6745d385153SJoe Perches p9_debug(P9_DEBUG_VFS, "fid lookup failed %d\n", err); 6756d27e64dSVenkateswararao Jujjuri return ERR_PTR(err); 676bd238fb4SLatchesar Ionkov } 677bd238fb4SLatchesar Ionkov 678bd238fb4SLatchesar Ionkov /* clone a fid to use for creation */ 6797d50a29fSAl Viro ofid = clone_fid(dfid); 680bd238fb4SLatchesar Ionkov if (IS_ERR(ofid)) { 681bd238fb4SLatchesar Ionkov err = PTR_ERR(ofid); 6825d385153SJoe Perches p9_debug(P9_DEBUG_VFS, "p9_client_walk failed %d\n", err); 6836d27e64dSVenkateswararao Jujjuri return ERR_PTR(err); 684bd238fb4SLatchesar Ionkov } 685bd238fb4SLatchesar Ionkov 686bd238fb4SLatchesar Ionkov err = p9_client_fcreate(ofid, name, perm, mode, extension); 68751a87c55SEric Van Hensbergen if (err < 0) { 6885d385153SJoe Perches p9_debug(P9_DEBUG_VFS, "p9_client_fcreate failed %d\n", err); 689bd238fb4SLatchesar Ionkov goto error; 69051a87c55SEric Van Hensbergen } 691bd238fb4SLatchesar Ionkov 692b6054793SAneesh Kumar K.V if (!(perm & P9_DMLINK)) { 693bd238fb4SLatchesar Ionkov /* now walk from the parent so we can get unopened fid */ 6946d27e64dSVenkateswararao Jujjuri fid = p9_client_walk(dfid, 1, &name, 1); 695bd238fb4SLatchesar Ionkov if (IS_ERR(fid)) { 696bd238fb4SLatchesar Ionkov err = PTR_ERR(fid); 697b6054793SAneesh Kumar K.V p9_debug(P9_DEBUG_VFS, 698b6054793SAneesh Kumar K.V "p9_client_walk failed %d\n", err); 699bd238fb4SLatchesar Ionkov fid = NULL; 700bd238fb4SLatchesar Ionkov goto error; 7016d27e64dSVenkateswararao Jujjuri } 702b6054793SAneesh Kumar K.V /* 703b6054793SAneesh Kumar K.V * instantiate inode and assign the unopened fid to the dentry 704b6054793SAneesh Kumar K.V */ 705ed80fcfaSAneesh Kumar K.V inode = v9fs_get_new_inode_from_fid(v9ses, fid, dir->i_sb); 706bd238fb4SLatchesar Ionkov if (IS_ERR(inode)) { 707bd238fb4SLatchesar Ionkov err = PTR_ERR(inode); 708b6054793SAneesh Kumar K.V p9_debug(P9_DEBUG_VFS, 709b6054793SAneesh Kumar K.V "inode creation failed %d\n", err); 710bd238fb4SLatchesar Ionkov goto error; 711bd238fb4SLatchesar Ionkov } 7122ea03e1dSAl Viro v9fs_fid_add(dentry, fid); 7135441ae5eSAneesh Kumar K.V d_instantiate(dentry, inode); 714b6054793SAneesh Kumar K.V } 715bd238fb4SLatchesar Ionkov return ofid; 716bd238fb4SLatchesar Ionkov error: 717bd238fb4SLatchesar Ionkov if (ofid) 718bd238fb4SLatchesar Ionkov p9_client_clunk(ofid); 719bd238fb4SLatchesar Ionkov 720bd238fb4SLatchesar Ionkov if (fid) 721bd238fb4SLatchesar Ionkov p9_client_clunk(fid); 722bd238fb4SLatchesar Ionkov 723bd238fb4SLatchesar Ionkov return ERR_PTR(err); 724bd238fb4SLatchesar Ionkov } 725bd238fb4SLatchesar Ionkov 7262bad8471SEric Van Hensbergen /** 727e43ae79cSMiklos Szeredi * v9fs_vfs_create - VFS hook to create a regular file 728e43ae79cSMiklos Szeredi * 729e43ae79cSMiklos Szeredi * open(.., O_CREAT) is handled in v9fs_vfs_atomic_open(). This is only called 730e43ae79cSMiklos Szeredi * for mknod(2). 731e43ae79cSMiklos Szeredi * 732ee443996SEric Van Hensbergen * @dir: directory inode that is being created 7332bad8471SEric Van Hensbergen * @dentry: dentry that is being deleted 7346a3124a3SLatchesar Ionkov * @mode: create permissions 7352bad8471SEric Van Hensbergen * 7362bad8471SEric Van Hensbergen */ 7372bad8471SEric Van Hensbergen 7382bad8471SEric Van Hensbergen static int 7394acdaf27SAl Viro v9fs_vfs_create(struct inode *dir, struct dentry *dentry, umode_t mode, 740ebfc3b49SAl Viro bool excl) 7412bad8471SEric Van Hensbergen { 742e43ae79cSMiklos Szeredi struct v9fs_session_info *v9ses = v9fs_inode2v9ses(dir); 743e43ae79cSMiklos Szeredi u32 perm = unixmode2p9mode(v9ses, mode); 744e43ae79cSMiklos Szeredi struct p9_fid *fid; 7456a3124a3SLatchesar Ionkov 746e43ae79cSMiklos Szeredi /* P9_OEXCL? */ 747e43ae79cSMiklos Szeredi fid = v9fs_create(v9ses, dir, dentry, NULL, perm, P9_ORDWR); 748e43ae79cSMiklos Szeredi if (IS_ERR(fid)) 749e43ae79cSMiklos Szeredi return PTR_ERR(fid); 7506a3124a3SLatchesar Ionkov 751d28c61f0SAneesh Kumar K.V v9fs_invalidate_inode_attr(dir); 752bd238fb4SLatchesar Ionkov p9_client_clunk(fid); 7536a3124a3SLatchesar Ionkov 7546a3124a3SLatchesar Ionkov return 0; 7552bad8471SEric Van Hensbergen } 7562bad8471SEric Van Hensbergen 7572bad8471SEric Van Hensbergen /** 7582bad8471SEric Van Hensbergen * v9fs_vfs_mkdir - VFS mkdir hook to create a directory 759ee443996SEric Van Hensbergen * @dir: inode that is being unlinked 7602bad8471SEric Van Hensbergen * @dentry: dentry that is being unlinked 7612bad8471SEric Van Hensbergen * @mode: mode for new directory 7622bad8471SEric Van Hensbergen * 7632bad8471SEric Van Hensbergen */ 7642bad8471SEric Van Hensbergen 76518bb1db3SAl Viro static int v9fs_vfs_mkdir(struct inode *dir, struct dentry *dentry, umode_t mode) 7662bad8471SEric Van Hensbergen { 7676a3124a3SLatchesar Ionkov int err; 768bd238fb4SLatchesar Ionkov u32 perm; 769bd238fb4SLatchesar Ionkov struct p9_fid *fid; 770d28c61f0SAneesh Kumar K.V struct v9fs_session_info *v9ses; 7716a3124a3SLatchesar Ionkov 7724b8e9923SAl Viro p9_debug(P9_DEBUG_VFS, "name %pd\n", dentry); 773bd238fb4SLatchesar Ionkov err = 0; 7746a3124a3SLatchesar Ionkov v9ses = v9fs_inode2v9ses(dir); 7756a3124a3SLatchesar Ionkov perm = unixmode2p9mode(v9ses, mode | S_IFDIR); 776bd238fb4SLatchesar Ionkov fid = v9fs_create(v9ses, dir, dentry, NULL, perm, P9_OREAD); 777bd238fb4SLatchesar Ionkov if (IS_ERR(fid)) { 778bd238fb4SLatchesar Ionkov err = PTR_ERR(fid); 779bd238fb4SLatchesar Ionkov fid = NULL; 780d28c61f0SAneesh Kumar K.V } else { 781b271ec47SAneesh Kumar K.V inc_nlink(dir); 782d28c61f0SAneesh Kumar K.V v9fs_invalidate_inode_attr(dir); 783d28c61f0SAneesh Kumar K.V } 7846a3124a3SLatchesar Ionkov 785bd238fb4SLatchesar Ionkov if (fid) 786bd238fb4SLatchesar Ionkov p9_client_clunk(fid); 7876a3124a3SLatchesar Ionkov 7886a3124a3SLatchesar Ionkov return err; 7892bad8471SEric Van Hensbergen } 7902bad8471SEric Van Hensbergen 7912bad8471SEric Van Hensbergen /** 7922bad8471SEric Van Hensbergen * v9fs_vfs_lookup - VFS lookup hook to "walk" to a new inode 7932bad8471SEric Van Hensbergen * @dir: inode that is being walked from 7942bad8471SEric Van Hensbergen * @dentry: dentry that is being walked to? 795fd2916bdSFabian Frederick * @flags: lookup flags (unused) 7962bad8471SEric Van Hensbergen * 7972bad8471SEric Van Hensbergen */ 7982bad8471SEric Van Hensbergen 79953c06f4eSAneesh Kumar K.V struct dentry *v9fs_vfs_lookup(struct inode *dir, struct dentry *dentry, 80000cd8dd3SAl Viro unsigned int flags) 8012bad8471SEric Van Hensbergen { 80273f50717SAneesh Kumar K.V struct dentry *res; 8032bad8471SEric Van Hensbergen struct v9fs_session_info *v9ses; 804bd238fb4SLatchesar Ionkov struct p9_fid *dfid, *fid; 8052bad8471SEric Van Hensbergen struct inode *inode; 8067880b43bSAl Viro const unsigned char *name; 8072bad8471SEric Van Hensbergen 8084b8e9923SAl Viro p9_debug(P9_DEBUG_VFS, "dir: %p dentry: (%pd) %p flags: %x\n", 8094b8e9923SAl Viro dir, dentry, dentry, flags); 8102bad8471SEric Van Hensbergen 81111e9b49bSSripathi Kodi if (dentry->d_name.len > NAME_MAX) 81211e9b49bSSripathi Kodi return ERR_PTR(-ENAMETOOLONG); 81311e9b49bSSripathi Kodi 8142bad8471SEric Van Hensbergen v9ses = v9fs_inode2v9ses(dir); 815a534c8d1SAneesh Kumar K.V /* We can walk d_parent because we hold the dir->i_mutex */ 81677d5a6b7SAl Viro dfid = v9fs_parent_fid(dentry); 817bd238fb4SLatchesar Ionkov if (IS_ERR(dfid)) 818e231c2eeSDavid Howells return ERR_CAST(dfid); 8192bad8471SEric Van Hensbergen 82073f50717SAneesh Kumar K.V /* 82173f50717SAneesh Kumar K.V * Make sure we don't use a wrong inode due to parallel 82273f50717SAneesh Kumar K.V * unlink. For cached mode create calls request for new 82373f50717SAneesh Kumar K.V * inode. But with cache disabled, lookup should do this. 82473f50717SAneesh Kumar K.V */ 825500e2ab6SAl Viro name = dentry->d_name.name; 826500e2ab6SAl Viro fid = p9_client_walk(dfid, 1, &name, 1); 827500e2ab6SAl Viro if (fid == ERR_PTR(-ENOENT)) 828500e2ab6SAl Viro inode = NULL; 829500e2ab6SAl Viro else if (IS_ERR(fid)) 830500e2ab6SAl Viro inode = ERR_CAST(fid); 831500e2ab6SAl Viro else if (v9ses->cache == CACHE_LOOSE || v9ses->cache == CACHE_FSCACHE) 832a78ce05dSAneesh Kumar K.V inode = v9fs_get_inode_from_fid(v9ses, fid, dir->i_sb); 83373f50717SAneesh Kumar K.V else 83473f50717SAneesh Kumar K.V inode = v9fs_get_new_inode_from_fid(v9ses, fid, dir->i_sb); 83573f50717SAneesh Kumar K.V /* 83673f50717SAneesh Kumar K.V * If we had a rename on the server and a parallel lookup 83773f50717SAneesh Kumar K.V * for the new name, then make sure we instantiate with 83873f50717SAneesh Kumar K.V * the new name. ie look up for a/b, while on server somebody 83973f50717SAneesh Kumar K.V * moved b under k and client parallely did a lookup for 84073f50717SAneesh Kumar K.V * k/b. 84173f50717SAneesh Kumar K.V */ 84241d28bcaSAl Viro res = d_splice_alias(inode, dentry); 843500e2ab6SAl Viro if (!IS_ERR(fid)) { 844a3b2157eSAl Viro if (!res) 845a3b2157eSAl Viro v9fs_fid_add(dentry, fid); 846a3b2157eSAl Viro else if (!IS_ERR(res)) 847a3b2157eSAl Viro v9fs_fid_add(res, fid); 848a3b2157eSAl Viro else 849bd238fb4SLatchesar Ionkov p9_client_clunk(fid); 850500e2ab6SAl Viro } 8517b5be621SAl Viro return res; 8522bad8471SEric Van Hensbergen } 8532bad8471SEric Van Hensbergen 854d9585277SAl Viro static int 855e43ae79cSMiklos Szeredi v9fs_vfs_atomic_open(struct inode *dir, struct dentry *dentry, 85644907d79SAl Viro struct file *file, unsigned flags, umode_t mode) 857e43ae79cSMiklos Szeredi { 858e43ae79cSMiklos Szeredi int err; 859e43ae79cSMiklos Szeredi u32 perm; 860e43ae79cSMiklos Szeredi struct v9fs_inode *v9inode; 861e43ae79cSMiklos Szeredi struct v9fs_session_info *v9ses; 862e43ae79cSMiklos Szeredi struct p9_fid *fid, *inode_fid; 863e43ae79cSMiklos Szeredi struct dentry *res = NULL; 864e43ae79cSMiklos Szeredi 86500699ad8SAl Viro if (d_in_lookup(dentry)) { 86600cd8dd3SAl Viro res = v9fs_vfs_lookup(dir, dentry, 0); 867e43ae79cSMiklos Szeredi if (IS_ERR(res)) 868d9585277SAl Viro return PTR_ERR(res); 869e43ae79cSMiklos Szeredi 870e43ae79cSMiklos Szeredi if (res) 871e43ae79cSMiklos Szeredi dentry = res; 872e43ae79cSMiklos Szeredi } 873e43ae79cSMiklos Szeredi 874e43ae79cSMiklos Szeredi /* Only creates */ 8752b0143b5SDavid Howells if (!(flags & O_CREAT) || d_really_is_positive(dentry)) 876e45198a6SAl Viro return finish_no_open(file, res); 877e43ae79cSMiklos Szeredi 878e43ae79cSMiklos Szeredi err = 0; 879fae74696SGeyslan G. Bem 880e43ae79cSMiklos Szeredi v9ses = v9fs_inode2v9ses(dir); 881e43ae79cSMiklos Szeredi perm = unixmode2p9mode(v9ses, mode); 882e43ae79cSMiklos Szeredi fid = v9fs_create(v9ses, dir, dentry, NULL, perm, 883e43ae79cSMiklos Szeredi v9fs_uflags2omode(flags, 884e43ae79cSMiklos Szeredi v9fs_proto_dotu(v9ses))); 885e43ae79cSMiklos Szeredi if (IS_ERR(fid)) { 886e43ae79cSMiklos Szeredi err = PTR_ERR(fid); 887e43ae79cSMiklos Szeredi fid = NULL; 888e43ae79cSMiklos Szeredi goto error; 889e43ae79cSMiklos Szeredi } 890e43ae79cSMiklos Szeredi 891e43ae79cSMiklos Szeredi v9fs_invalidate_inode_attr(dir); 8922b0143b5SDavid Howells v9inode = V9FS_I(d_inode(dentry)); 893e43ae79cSMiklos Szeredi mutex_lock(&v9inode->v_mutex); 894fb89b45cSDominique Martinet if ((v9ses->cache == CACHE_LOOSE || v9ses->cache == CACHE_FSCACHE) && 895fb89b45cSDominique Martinet !v9inode->writeback_fid && 896e43ae79cSMiklos Szeredi ((flags & O_ACCMODE) != O_RDONLY)) { 897e43ae79cSMiklos Szeredi /* 898e43ae79cSMiklos Szeredi * clone a fid and add it to writeback_fid 899e43ae79cSMiklos Szeredi * we do it during open time instead of 900e43ae79cSMiklos Szeredi * page dirty time via write_begin/page_mkwrite 901e43ae79cSMiklos Szeredi * because we want write after unlink usecase 902e43ae79cSMiklos Szeredi * to work. 903e43ae79cSMiklos Szeredi */ 904e43ae79cSMiklos Szeredi inode_fid = v9fs_writeback_fid(dentry); 905e43ae79cSMiklos Szeredi if (IS_ERR(inode_fid)) { 906e43ae79cSMiklos Szeredi err = PTR_ERR(inode_fid); 907e43ae79cSMiklos Szeredi mutex_unlock(&v9inode->v_mutex); 908e43ae79cSMiklos Szeredi goto error; 909e43ae79cSMiklos Szeredi } 910e43ae79cSMiklos Szeredi v9inode->writeback_fid = (void *) inode_fid; 911e43ae79cSMiklos Szeredi } 912e43ae79cSMiklos Szeredi mutex_unlock(&v9inode->v_mutex); 913be12af3eSAl Viro err = finish_open(file, dentry, generic_file_open); 91430d90494SAl Viro if (err) 915e43ae79cSMiklos Szeredi goto error; 916e43ae79cSMiklos Szeredi 91730d90494SAl Viro file->private_data = fid; 918fb89b45cSDominique Martinet if (v9ses->cache == CACHE_LOOSE || v9ses->cache == CACHE_FSCACHE) 9192b0143b5SDavid Howells v9fs_cache_inode_set_cookie(d_inode(dentry), file); 920e43ae79cSMiklos Szeredi 92173a09dd9SAl Viro file->f_mode |= FMODE_CREATED; 922e43ae79cSMiklos Szeredi out: 923e43ae79cSMiklos Szeredi dput(res); 924d9585277SAl Viro return err; 925e43ae79cSMiklos Szeredi 926e43ae79cSMiklos Szeredi error: 927e43ae79cSMiklos Szeredi if (fid) 928e43ae79cSMiklos Szeredi p9_client_clunk(fid); 929e43ae79cSMiklos Szeredi goto out; 930e43ae79cSMiklos Szeredi } 931e43ae79cSMiklos Szeredi 9322bad8471SEric Van Hensbergen /** 9332bad8471SEric Van Hensbergen * v9fs_vfs_unlink - VFS unlink hook to delete an inode 9342bad8471SEric Van Hensbergen * @i: inode that is being unlinked 93573c592b9SEric Van Hensbergen * @d: dentry that is being unlinked 9362bad8471SEric Van Hensbergen * 9372bad8471SEric Van Hensbergen */ 9382bad8471SEric Van Hensbergen 93953c06f4eSAneesh Kumar K.V int v9fs_vfs_unlink(struct inode *i, struct dentry *d) 9402bad8471SEric Van Hensbergen { 9412bad8471SEric Van Hensbergen return v9fs_remove(i, d, 0); 9422bad8471SEric Van Hensbergen } 9432bad8471SEric Van Hensbergen 9442bad8471SEric Van Hensbergen /** 9452bad8471SEric Van Hensbergen * v9fs_vfs_rmdir - VFS unlink hook to delete a directory 9462bad8471SEric Van Hensbergen * @i: inode that is being unlinked 94773c592b9SEric Van Hensbergen * @d: dentry that is being unlinked 9482bad8471SEric Van Hensbergen * 9492bad8471SEric Van Hensbergen */ 9502bad8471SEric Van Hensbergen 95153c06f4eSAneesh Kumar K.V int v9fs_vfs_rmdir(struct inode *i, struct dentry *d) 9522bad8471SEric Van Hensbergen { 95348e370ffSAneesh Kumar K.V return v9fs_remove(i, d, AT_REMOVEDIR); 9542bad8471SEric Van Hensbergen } 9552bad8471SEric Van Hensbergen 9562bad8471SEric Van Hensbergen /** 9572bad8471SEric Van Hensbergen * v9fs_vfs_rename - VFS hook to rename an inode 9582bad8471SEric Van Hensbergen * @old_dir: old dir inode 9592bad8471SEric Van Hensbergen * @old_dentry: old dentry 9602bad8471SEric Van Hensbergen * @new_dir: new dir inode 9612bad8471SEric Van Hensbergen * @new_dentry: new dentry 9622bad8471SEric Van Hensbergen * 9632bad8471SEric Van Hensbergen */ 9642bad8471SEric Van Hensbergen 96553c06f4eSAneesh Kumar K.V int 9662bad8471SEric Van Hensbergen v9fs_vfs_rename(struct inode *old_dir, struct dentry *old_dentry, 9671cd66c93SMiklos Szeredi struct inode *new_dir, struct dentry *new_dentry, 9681cd66c93SMiklos Szeredi unsigned int flags) 9692bad8471SEric Van Hensbergen { 970d28c61f0SAneesh Kumar K.V int retval; 971bd238fb4SLatchesar Ionkov struct inode *old_inode; 972b271ec47SAneesh Kumar K.V struct inode *new_inode; 973bd238fb4SLatchesar Ionkov struct v9fs_session_info *v9ses; 974bd238fb4SLatchesar Ionkov struct p9_fid *oldfid; 975bd238fb4SLatchesar Ionkov struct p9_fid *olddirfid; 976bd238fb4SLatchesar Ionkov struct p9_fid *newdirfid; 977bd238fb4SLatchesar Ionkov struct p9_wstat wstat; 9782bad8471SEric Van Hensbergen 9791cd66c93SMiklos Szeredi if (flags) 9801cd66c93SMiklos Szeredi return -EINVAL; 9811cd66c93SMiklos Szeredi 9825d385153SJoe Perches p9_debug(P9_DEBUG_VFS, "\n"); 983bd238fb4SLatchesar Ionkov retval = 0; 9842b0143b5SDavid Howells old_inode = d_inode(old_dentry); 9852b0143b5SDavid Howells new_inode = d_inode(new_dentry); 986bd238fb4SLatchesar Ionkov v9ses = v9fs_inode2v9ses(old_inode); 987bd238fb4SLatchesar Ionkov oldfid = v9fs_fid_lookup(old_dentry); 988da977b2cSEric Van Hensbergen if (IS_ERR(oldfid)) 989da977b2cSEric Van Hensbergen return PTR_ERR(oldfid); 990da977b2cSEric Van Hensbergen 991797fc16dSAl Viro olddirfid = clone_fid(v9fs_parent_fid(old_dentry)); 992da977b2cSEric Van Hensbergen if (IS_ERR(olddirfid)) { 993da977b2cSEric Van Hensbergen retval = PTR_ERR(olddirfid); 994bd238fb4SLatchesar Ionkov goto done; 995da977b2cSEric Van Hensbergen } 996da977b2cSEric Van Hensbergen 997797fc16dSAl Viro newdirfid = clone_fid(v9fs_parent_fid(new_dentry)); 998da977b2cSEric Van Hensbergen if (IS_ERR(newdirfid)) { 999da977b2cSEric Van Hensbergen retval = PTR_ERR(newdirfid); 1000bd238fb4SLatchesar Ionkov goto clunk_olddir; 10012bad8471SEric Van Hensbergen } 10022bad8471SEric Van Hensbergen 1003a534c8d1SAneesh Kumar K.V down_write(&v9ses->rename_sem); 10044681dbdaSSripathi Kodi if (v9fs_proto_dotl(v9ses)) { 10059e8fb38eSAneesh Kumar K.V retval = p9_client_renameat(olddirfid, old_dentry->d_name.name, 10069e8fb38eSAneesh Kumar K.V newdirfid, new_dentry->d_name.name); 10079e8fb38eSAneesh Kumar K.V if (retval == -EOPNOTSUPP) 10084681dbdaSSripathi Kodi retval = p9_client_rename(oldfid, newdirfid, 10099e8fb38eSAneesh Kumar K.V new_dentry->d_name.name); 10109e8fb38eSAneesh Kumar K.V if (retval != -EOPNOTSUPP) 10114681dbdaSSripathi Kodi goto clunk_newdir; 10124681dbdaSSripathi Kodi } 1013a534c8d1SAneesh Kumar K.V if (old_dentry->d_parent != new_dentry->d_parent) { 1014a534c8d1SAneesh Kumar K.V /* 1015a534c8d1SAneesh Kumar K.V * 9P .u can only handle file rename in the same directory 1016a534c8d1SAneesh Kumar K.V */ 10174681dbdaSSripathi Kodi 10185d385153SJoe Perches p9_debug(P9_DEBUG_ERROR, "old dir and new dir are different\n"); 1019621997cdSEric Van Hensbergen retval = -EXDEV; 1020bd238fb4SLatchesar Ionkov goto clunk_newdir; 10212bad8471SEric Van Hensbergen } 1022531b1094SLatchesar Ionkov v9fs_blank_wstat(&wstat); 1023ba17674fSLatchesar Ionkov wstat.muid = v9ses->uname; 10247880b43bSAl Viro wstat.name = new_dentry->d_name.name; 1025bd238fb4SLatchesar Ionkov retval = p9_client_wstat(oldfid, &wstat); 10262bad8471SEric Van Hensbergen 1027bd238fb4SLatchesar Ionkov clunk_newdir: 1028b271ec47SAneesh Kumar K.V if (!retval) { 1029b271ec47SAneesh Kumar K.V if (new_inode) { 1030b271ec47SAneesh Kumar K.V if (S_ISDIR(new_inode->i_mode)) 1031b271ec47SAneesh Kumar K.V clear_nlink(new_inode); 1032b271ec47SAneesh Kumar K.V else 1033ac89b2efSEryu Guan v9fs_dec_count(new_inode); 1034b271ec47SAneesh Kumar K.V } 1035b271ec47SAneesh Kumar K.V if (S_ISDIR(old_inode->i_mode)) { 1036b271ec47SAneesh Kumar K.V if (!new_inode) 1037b271ec47SAneesh Kumar K.V inc_nlink(new_dir); 1038ac89b2efSEryu Guan v9fs_dec_count(old_dir); 1039b271ec47SAneesh Kumar K.V } 10403bc86de3SAneesh Kumar K.V v9fs_invalidate_inode_attr(old_inode); 1041d28c61f0SAneesh Kumar K.V v9fs_invalidate_inode_attr(old_dir); 1042d28c61f0SAneesh Kumar K.V v9fs_invalidate_inode_attr(new_dir); 10433bc86de3SAneesh Kumar K.V 1044a534c8d1SAneesh Kumar K.V /* successful rename */ 1045a534c8d1SAneesh Kumar K.V d_move(old_dentry, new_dentry); 1046b271ec47SAneesh Kumar K.V } 1047a534c8d1SAneesh Kumar K.V up_write(&v9ses->rename_sem); 104822150c4fSLatchesar Ionkov p9_client_clunk(newdirfid); 10492bad8471SEric Van Hensbergen 1050bd238fb4SLatchesar Ionkov clunk_olddir: 105122150c4fSLatchesar Ionkov p9_client_clunk(olddirfid); 10522bad8471SEric Van Hensbergen 1053bd238fb4SLatchesar Ionkov done: 10542bad8471SEric Van Hensbergen return retval; 10552bad8471SEric Van Hensbergen } 10562bad8471SEric Van Hensbergen 10572bad8471SEric Van Hensbergen /** 1058943ffb58SAdrian Bunk * v9fs_vfs_getattr - retrieve file metadata 1059a528d35eSDavid Howells * @path: Object to query 1060ee443996SEric Van Hensbergen * @stat: metadata structure to populate 1061a528d35eSDavid Howells * @request_mask: Mask of STATX_xxx flags indicating the caller's interests 1062a528d35eSDavid Howells * @flags: AT_STATX_xxx setting 10632bad8471SEric Van Hensbergen * 10642bad8471SEric Van Hensbergen */ 10652bad8471SEric Van Hensbergen 10662bad8471SEric Van Hensbergen static int 1067a528d35eSDavid Howells v9fs_vfs_getattr(const struct path *path, struct kstat *stat, 1068a528d35eSDavid Howells u32 request_mask, unsigned int flags) 10692bad8471SEric Van Hensbergen { 1070a528d35eSDavid Howells struct dentry *dentry = path->dentry; 1071bd238fb4SLatchesar Ionkov struct v9fs_session_info *v9ses; 1072bd238fb4SLatchesar Ionkov struct p9_fid *fid; 107351a87c55SEric Van Hensbergen struct p9_wstat *st; 10742bad8471SEric Van Hensbergen 10755d385153SJoe Perches p9_debug(P9_DEBUG_VFS, "dentry: %p\n", dentry); 107642869c8aSAneesh Kumar K.V v9ses = v9fs_dentry2v9ses(dentry); 1077a1211908SAneesh Kumar K.V if (v9ses->cache == CACHE_LOOSE || v9ses->cache == CACHE_FSCACHE) { 10782b0143b5SDavid Howells generic_fillattr(d_inode(dentry), stat); 1079a1211908SAneesh Kumar K.V return 0; 1080a1211908SAneesh Kumar K.V } 1081bd238fb4SLatchesar Ionkov fid = v9fs_fid_lookup(dentry); 1082da977b2cSEric Van Hensbergen if (IS_ERR(fid)) 1083da977b2cSEric Van Hensbergen return PTR_ERR(fid); 10842bad8471SEric Van Hensbergen 1085bd238fb4SLatchesar Ionkov st = p9_client_stat(fid); 1086bd238fb4SLatchesar Ionkov if (IS_ERR(st)) 1087bd238fb4SLatchesar Ionkov return PTR_ERR(st); 10882bad8471SEric Van Hensbergen 10895e3cc1eeSHou Tao v9fs_stat2inode(st, d_inode(dentry), dentry->d_sb, 0); 10902b0143b5SDavid Howells generic_fillattr(d_inode(dentry), stat); 10912bad8471SEric Van Hensbergen 109262b2be59SLatchesar Ionkov p9stat_free(st); 1093bd238fb4SLatchesar Ionkov kfree(st); 1094bd238fb4SLatchesar Ionkov return 0; 10952bad8471SEric Van Hensbergen } 10962bad8471SEric Van Hensbergen 10972bad8471SEric Van Hensbergen /** 10982bad8471SEric Van Hensbergen * v9fs_vfs_setattr - set file metadata 10992bad8471SEric Van Hensbergen * @dentry: file whose metadata to set 11002bad8471SEric Van Hensbergen * @iattr: metadata assignment structure 11012bad8471SEric Van Hensbergen * 11022bad8471SEric Van Hensbergen */ 11032bad8471SEric Van Hensbergen 11042bad8471SEric Van Hensbergen static int v9fs_vfs_setattr(struct dentry *dentry, struct iattr *iattr) 11052bad8471SEric Van Hensbergen { 1106bd238fb4SLatchesar Ionkov int retval; 1107bd238fb4SLatchesar Ionkov struct v9fs_session_info *v9ses; 1108bd238fb4SLatchesar Ionkov struct p9_fid *fid; 1109bd238fb4SLatchesar Ionkov struct p9_wstat wstat; 11102bad8471SEric Van Hensbergen 11115d385153SJoe Perches p9_debug(P9_DEBUG_VFS, "\n"); 111231051c85SJan Kara retval = setattr_prepare(dentry, iattr); 1113059c138bSAneesh Kumar K.V if (retval) 1114059c138bSAneesh Kumar K.V return retval; 1115059c138bSAneesh Kumar K.V 1116bd238fb4SLatchesar Ionkov retval = -EPERM; 111742869c8aSAneesh Kumar K.V v9ses = v9fs_dentry2v9ses(dentry); 1118bd238fb4SLatchesar Ionkov fid = v9fs_fid_lookup(dentry); 1119da977b2cSEric Van Hensbergen if(IS_ERR(fid)) 1120da977b2cSEric Van Hensbergen return PTR_ERR(fid); 11212bad8471SEric Van Hensbergen 1122531b1094SLatchesar Ionkov v9fs_blank_wstat(&wstat); 11232bad8471SEric Van Hensbergen if (iattr->ia_valid & ATTR_MODE) 1124531b1094SLatchesar Ionkov wstat.mode = unixmode2p9mode(v9ses, iattr->ia_mode); 11252bad8471SEric Van Hensbergen 11262bad8471SEric Van Hensbergen if (iattr->ia_valid & ATTR_MTIME) 1127531b1094SLatchesar Ionkov wstat.mtime = iattr->ia_mtime.tv_sec; 11282bad8471SEric Van Hensbergen 11292bad8471SEric Van Hensbergen if (iattr->ia_valid & ATTR_ATIME) 1130531b1094SLatchesar Ionkov wstat.atime = iattr->ia_atime.tv_sec; 11312bad8471SEric Van Hensbergen 11322bad8471SEric Van Hensbergen if (iattr->ia_valid & ATTR_SIZE) 1133531b1094SLatchesar Ionkov wstat.length = iattr->ia_size; 11342bad8471SEric Van Hensbergen 1135dd6102fbSSripathi Kodi if (v9fs_proto_dotu(v9ses)) { 1136531b1094SLatchesar Ionkov if (iattr->ia_valid & ATTR_UID) 1137531b1094SLatchesar Ionkov wstat.n_uid = iattr->ia_uid; 11382bad8471SEric Van Hensbergen 1139531b1094SLatchesar Ionkov if (iattr->ia_valid & ATTR_GID) 1140531b1094SLatchesar Ionkov wstat.n_gid = iattr->ia_gid; 11412bad8471SEric Van Hensbergen } 1142059c138bSAneesh Kumar K.V 11433dc5436aSAneesh Kumar K.V /* Write all dirty data */ 1144e36cb0b8SDavid Howells if (d_is_reg(dentry)) 11452b0143b5SDavid Howells filemap_write_and_wait(d_inode(dentry)->i_mapping); 11463dc5436aSAneesh Kumar K.V 1147f10fc50fSAneesh Kumar K.V retval = p9_client_wstat(fid, &wstat); 1148f10fc50fSAneesh Kumar K.V if (retval < 0) 1149f10fc50fSAneesh Kumar K.V return retval; 1150059c138bSAneesh Kumar K.V 1151059c138bSAneesh Kumar K.V if ((iattr->ia_valid & ATTR_SIZE) && 11522b0143b5SDavid Howells iattr->ia_size != i_size_read(d_inode(dentry))) 11532b0143b5SDavid Howells truncate_setsize(d_inode(dentry), iattr->ia_size); 1154059c138bSAneesh Kumar K.V 11552b0143b5SDavid Howells v9fs_invalidate_inode_attr(d_inode(dentry)); 11561025774cSChristoph Hellwig 11572b0143b5SDavid Howells setattr_copy(d_inode(dentry), iattr); 11582b0143b5SDavid Howells mark_inode_dirty(d_inode(dentry)); 11591025774cSChristoph Hellwig return 0; 11602bad8471SEric Van Hensbergen } 11612bad8471SEric Van Hensbergen 11622bad8471SEric Van Hensbergen /** 1163531b1094SLatchesar Ionkov * v9fs_stat2inode - populate an inode structure with mistat info 1164531b1094SLatchesar Ionkov * @stat: Plan 9 metadata (mistat) structure 11652bad8471SEric Van Hensbergen * @inode: inode to populate 11662bad8471SEric Van Hensbergen * @sb: superblock of filesystem 11675e3cc1eeSHou Tao * @flags: control flags (e.g. V9FS_STAT2INODE_KEEP_ISIZE) 11682bad8471SEric Van Hensbergen * 11692bad8471SEric Van Hensbergen */ 11702bad8471SEric Van Hensbergen 11712bad8471SEric Van Hensbergen void 117251a87c55SEric Van Hensbergen v9fs_stat2inode(struct p9_wstat *stat, struct inode *inode, 11735e3cc1eeSHou Tao struct super_block *sb, unsigned int flags) 11742bad8471SEric Van Hensbergen { 11753eda0de6SAl Viro umode_t mode; 1176531b1094SLatchesar Ionkov char ext[32]; 11775717144aSAneesh Kumar K.V char tag_name[14]; 11785717144aSAneesh Kumar K.V unsigned int i_nlink; 11792bad8471SEric Van Hensbergen struct v9fs_session_info *v9ses = sb->s_fs_info; 1180b3cbea03SAneesh Kumar K.V struct v9fs_inode *v9inode = V9FS_I(inode); 11812bad8471SEric Van Hensbergen 1182bfe86848SMiklos Szeredi set_nlink(inode, 1); 11832bad8471SEric Van Hensbergen 1184531b1094SLatchesar Ionkov inode->i_atime.tv_sec = stat->atime; 1185531b1094SLatchesar Ionkov inode->i_mtime.tv_sec = stat->mtime; 1186531b1094SLatchesar Ionkov inode->i_ctime.tv_sec = stat->mtime; 11872bad8471SEric Van Hensbergen 1188bd32b82dSLatchesar Ionkov inode->i_uid = v9ses->dfltuid; 1189bd32b82dSLatchesar Ionkov inode->i_gid = v9ses->dfltgid; 11902bad8471SEric Van Hensbergen 1191dd6102fbSSripathi Kodi if (v9fs_proto_dotu(v9ses)) { 1192531b1094SLatchesar Ionkov inode->i_uid = stat->n_uid; 1193531b1094SLatchesar Ionkov inode->i_gid = stat->n_gid; 1194531b1094SLatchesar Ionkov } 11955717144aSAneesh Kumar K.V if ((S_ISREG(inode->i_mode)) || (S_ISDIR(inode->i_mode))) { 11965717144aSAneesh Kumar K.V if (v9fs_proto_dotu(v9ses) && (stat->extension[0] != '\0')) { 11975717144aSAneesh Kumar K.V /* 11985717144aSAneesh Kumar K.V * Hadlink support got added later to 11995717144aSAneesh Kumar K.V * to the .u extension. So there can be 12005717144aSAneesh Kumar K.V * server out there that doesn't support 12015717144aSAneesh Kumar K.V * this even with .u extension. So check 12025717144aSAneesh Kumar K.V * for non NULL stat->extension 12035717144aSAneesh Kumar K.V */ 1204b3f8ab4bSChen Gang strlcpy(ext, stat->extension, sizeof(ext)); 12055717144aSAneesh Kumar K.V /* HARDLINKCOUNT %u */ 12065717144aSAneesh Kumar K.V sscanf(ext, "%13s %u", tag_name, &i_nlink); 12075717144aSAneesh Kumar K.V if (!strncmp(tag_name, "HARDLINKCOUNT", 13)) 1208bfe86848SMiklos Szeredi set_nlink(inode, i_nlink); 12095717144aSAneesh Kumar K.V } 12105717144aSAneesh Kumar K.V } 1211df345c67SAneesh Kumar K.V mode = p9mode2perm(v9ses, stat); 121245089142SAneesh Kumar K.V mode |= inode->i_mode & ~S_IALLUGO; 121345089142SAneesh Kumar K.V inode->i_mode = mode; 12142bad8471SEric Van Hensbergen 12155e3cc1eeSHou Tao if (!(flags & V9FS_STAT2INODE_KEEP_ISIZE)) 12165e3cc1eeSHou Tao v9fs_i_size_write(inode, stat->length); 1217bd238fb4SLatchesar Ionkov /* not real number of blocks, but 512 byte ones ... */ 12185e3cc1eeSHou Tao inode->i_blocks = (stat->length + 512 - 1) >> 9; 1219b3cbea03SAneesh Kumar K.V v9inode->cache_validity &= ~V9FS_INO_INVALID_ATTR; 12202bad8471SEric Van Hensbergen } 12212bad8471SEric Van Hensbergen 12222bad8471SEric Van Hensbergen /** 12232bad8471SEric Van Hensbergen * v9fs_qid2ino - convert qid into inode number 12242bad8471SEric Van Hensbergen * @qid: qid to hash 12252bad8471SEric Van Hensbergen * 12262bad8471SEric Van Hensbergen * BUG: potential for inode number collisions? 12272bad8471SEric Van Hensbergen */ 12282bad8471SEric Van Hensbergen 1229bd238fb4SLatchesar Ionkov ino_t v9fs_qid2ino(struct p9_qid *qid) 12302bad8471SEric Van Hensbergen { 12312bad8471SEric Van Hensbergen u64 path = qid->path + 2; 12322bad8471SEric Van Hensbergen ino_t i = 0; 12332bad8471SEric Van Hensbergen 12342bad8471SEric Van Hensbergen if (sizeof(ino_t) == sizeof(path)) 12352bad8471SEric Van Hensbergen memcpy(&i, &path, sizeof(ino_t)); 12362bad8471SEric Van Hensbergen else 12372bad8471SEric Van Hensbergen i = (ino_t) (path ^ (path >> 32)); 12382bad8471SEric Van Hensbergen 12392bad8471SEric Van Hensbergen return i; 12402bad8471SEric Van Hensbergen } 12412bad8471SEric Van Hensbergen 12422bad8471SEric Van Hensbergen /** 12436b255391SAl Viro * v9fs_vfs_get_link - follow a symlink path 12442bad8471SEric Van Hensbergen * @dentry: dentry for symlink 12456b255391SAl Viro * @inode: inode for symlink 1246fceef393SAl Viro * @done: delayed call for when we are done with the return value 12472bad8471SEric Van Hensbergen */ 12482bad8471SEric Van Hensbergen 12496b255391SAl Viro static const char *v9fs_vfs_get_link(struct dentry *dentry, 1250fceef393SAl Viro struct inode *inode, 1251fceef393SAl Viro struct delayed_call *done) 12522bad8471SEric Van Hensbergen { 12536b255391SAl Viro struct v9fs_session_info *v9ses; 12546b255391SAl Viro struct p9_fid *fid; 125590e4fc88SAl Viro struct p9_wstat *st; 1256680baacbSAl Viro char *res; 12572bad8471SEric Van Hensbergen 12586b255391SAl Viro if (!dentry) 12596b255391SAl Viro return ERR_PTR(-ECHILD); 12606b255391SAl Viro 12616b255391SAl Viro v9ses = v9fs_dentry2v9ses(dentry); 12626b255391SAl Viro fid = v9fs_fid_lookup(dentry); 12634b8e9923SAl Viro p9_debug(P9_DEBUG_VFS, "%pd\n", dentry); 12642bad8471SEric Van Hensbergen 126590e4fc88SAl Viro if (IS_ERR(fid)) 126690e4fc88SAl Viro return ERR_CAST(fid); 12672bad8471SEric Van Hensbergen 126890e4fc88SAl Viro if (!v9fs_proto_dotu(v9ses)) 126990e4fc88SAl Viro return ERR_PTR(-EBADF); 127090e4fc88SAl Viro 127190e4fc88SAl Viro st = p9_client_stat(fid); 127290e4fc88SAl Viro if (IS_ERR(st)) 127390e4fc88SAl Viro return ERR_CAST(st); 127490e4fc88SAl Viro 127590e4fc88SAl Viro if (!(st->mode & P9_DMSYMLINK)) { 127690e4fc88SAl Viro p9stat_free(st); 127790e4fc88SAl Viro kfree(st); 127890e4fc88SAl Viro return ERR_PTR(-EINVAL); 12792bad8471SEric Van Hensbergen } 1280680baacbSAl Viro res = st->extension; 128190e4fc88SAl Viro st->extension = NULL; 1282680baacbSAl Viro if (strlen(res) >= PATH_MAX) 1283680baacbSAl Viro res[PATH_MAX - 1] = '\0'; 1284680baacbSAl Viro 128590e4fc88SAl Viro p9stat_free(st); 128690e4fc88SAl Viro kfree(st); 1287fceef393SAl Viro set_delayed_call(done, kfree_link, res); 1288fceef393SAl Viro return res; 12892bad8471SEric Van Hensbergen } 12902bad8471SEric Van Hensbergen 12912bad8471SEric Van Hensbergen /** 1292ee443996SEric Van Hensbergen * v9fs_vfs_mkspecial - create a special file 1293ee443996SEric Van Hensbergen * @dir: inode to create special file in 1294ee443996SEric Van Hensbergen * @dentry: dentry to create 1295fd2916bdSFabian Frederick * @perm: mode to create special file 1296ee443996SEric Van Hensbergen * @extension: 9p2000.u format extension string representing special file 1297ee443996SEric Van Hensbergen * 1298ee443996SEric Van Hensbergen */ 1299ee443996SEric Van Hensbergen 1300531b1094SLatchesar Ionkov static int v9fs_vfs_mkspecial(struct inode *dir, struct dentry *dentry, 1301c2837de7SAl Viro u32 perm, const char *extension) 1302531b1094SLatchesar Ionkov { 1303bd238fb4SLatchesar Ionkov struct p9_fid *fid; 1304d28c61f0SAneesh Kumar K.V struct v9fs_session_info *v9ses; 1305531b1094SLatchesar Ionkov 13066a3124a3SLatchesar Ionkov v9ses = v9fs_inode2v9ses(dir); 1307dd6102fbSSripathi Kodi if (!v9fs_proto_dotu(v9ses)) { 13085d385153SJoe Perches p9_debug(P9_DEBUG_ERROR, "not extended\n"); 13096a3124a3SLatchesar Ionkov return -EPERM; 1310531b1094SLatchesar Ionkov } 1311531b1094SLatchesar Ionkov 1312bd238fb4SLatchesar Ionkov fid = v9fs_create(v9ses, dir, dentry, (char *) extension, perm, 1313bd238fb4SLatchesar Ionkov P9_OREAD); 1314bd238fb4SLatchesar Ionkov if (IS_ERR(fid)) 1315bd238fb4SLatchesar Ionkov return PTR_ERR(fid); 1316da977b2cSEric Van Hensbergen 1317d28c61f0SAneesh Kumar K.V v9fs_invalidate_inode_attr(dir); 1318bd238fb4SLatchesar Ionkov p9_client_clunk(fid); 13196a3124a3SLatchesar Ionkov return 0; 1320531b1094SLatchesar Ionkov } 1321531b1094SLatchesar Ionkov 1322531b1094SLatchesar Ionkov /** 1323531b1094SLatchesar Ionkov * v9fs_vfs_symlink - helper function to create symlinks 1324531b1094SLatchesar Ionkov * @dir: directory inode containing symlink 1325531b1094SLatchesar Ionkov * @dentry: dentry for symlink 1326531b1094SLatchesar Ionkov * @symname: symlink data 1327531b1094SLatchesar Ionkov * 1328ee443996SEric Van Hensbergen * See Also: 9P2000.u RFC for more information 1329531b1094SLatchesar Ionkov * 1330531b1094SLatchesar Ionkov */ 1331531b1094SLatchesar Ionkov 1332531b1094SLatchesar Ionkov static int 1333531b1094SLatchesar Ionkov v9fs_vfs_symlink(struct inode *dir, struct dentry *dentry, const char *symname) 1334531b1094SLatchesar Ionkov { 13354b8e9923SAl Viro p9_debug(P9_DEBUG_VFS, " %lu,%pd,%s\n", 13364b8e9923SAl Viro dir->i_ino, dentry, symname); 1337531b1094SLatchesar Ionkov 1338c2837de7SAl Viro return v9fs_vfs_mkspecial(dir, dentry, P9_DMSYMLINK, symname); 1339531b1094SLatchesar Ionkov } 1340531b1094SLatchesar Ionkov 1341b46c267eSAl Viro #define U32_MAX_DIGITS 10 1342b46c267eSAl Viro 13432bad8471SEric Van Hensbergen /** 13442bad8471SEric Van Hensbergen * v9fs_vfs_link - create a hardlink 13452bad8471SEric Van Hensbergen * @old_dentry: dentry for file to link to 13462bad8471SEric Van Hensbergen * @dir: inode destination for new link 134773c592b9SEric Van Hensbergen * @dentry: dentry for link 13482bad8471SEric Van Hensbergen * 13492bad8471SEric Van Hensbergen */ 13502bad8471SEric Van Hensbergen 13512bad8471SEric Van Hensbergen static int 13522bad8471SEric Van Hensbergen v9fs_vfs_link(struct dentry *old_dentry, struct inode *dir, 13532bad8471SEric Van Hensbergen struct dentry *dentry) 13542bad8471SEric Van Hensbergen { 1355531b1094SLatchesar Ionkov int retval; 1356b46c267eSAl Viro char name[1 + U32_MAX_DIGITS + 2]; /* sign + number + \n + \0 */ 1357d28c61f0SAneesh Kumar K.V struct p9_fid *oldfid; 13582bad8471SEric Van Hensbergen 13594b8e9923SAl Viro p9_debug(P9_DEBUG_VFS, " %lu,%pd,%pd\n", 13604b8e9923SAl Viro dir->i_ino, dentry, old_dentry); 13612bad8471SEric Van Hensbergen 1362da977b2cSEric Van Hensbergen oldfid = v9fs_fid_clone(old_dentry); 1363da977b2cSEric Van Hensbergen if (IS_ERR(oldfid)) 1364da977b2cSEric Van Hensbergen return PTR_ERR(oldfid); 13652bad8471SEric Van Hensbergen 136616cce6d2SLatchesar Ionkov sprintf(name, "%d\n", oldfid->fid); 1367bd238fb4SLatchesar Ionkov retval = v9fs_vfs_mkspecial(dir, dentry, P9_DMLINK, name); 1368c06c066aSAneesh Kumar K.V if (!retval) { 13692b0143b5SDavid Howells v9fs_refresh_inode(oldfid, d_inode(old_dentry)); 1370d28c61f0SAneesh Kumar K.V v9fs_invalidate_inode_attr(dir); 1371c06c066aSAneesh Kumar K.V } 1372bd238fb4SLatchesar Ionkov p9_client_clunk(oldfid); 13732bad8471SEric Van Hensbergen return retval; 13742bad8471SEric Van Hensbergen } 13752bad8471SEric Van Hensbergen 13762bad8471SEric Van Hensbergen /** 13772bad8471SEric Van Hensbergen * v9fs_vfs_mknod - create a special file 13782bad8471SEric Van Hensbergen * @dir: inode destination for new link 13792bad8471SEric Van Hensbergen * @dentry: dentry for file 13802bad8471SEric Van Hensbergen * @mode: mode for creation 1381ee443996SEric Van Hensbergen * @rdev: device associated with special file 13822bad8471SEric Van Hensbergen * 13832bad8471SEric Van Hensbergen */ 13842bad8471SEric Van Hensbergen 13852bad8471SEric Van Hensbergen static int 13861a67aafbSAl Viro v9fs_vfs_mknod(struct inode *dir, struct dentry *dentry, umode_t mode, dev_t rdev) 13872bad8471SEric Van Hensbergen { 1388c2837de7SAl Viro struct v9fs_session_info *v9ses = v9fs_inode2v9ses(dir); 1389531b1094SLatchesar Ionkov int retval; 1390b46c267eSAl Viro char name[2 + U32_MAX_DIGITS + 1 + U32_MAX_DIGITS + 1]; 1391c2837de7SAl Viro u32 perm; 13922bad8471SEric Van Hensbergen 13934b8e9923SAl Viro p9_debug(P9_DEBUG_VFS, " %lu,%pd mode: %hx MAJOR: %u MINOR: %u\n", 13944b8e9923SAl Viro dir->i_ino, dentry, mode, 13955d385153SJoe Perches MAJOR(rdev), MINOR(rdev)); 13962bad8471SEric Van Hensbergen 13972bad8471SEric Van Hensbergen /* build extension */ 13982bad8471SEric Van Hensbergen if (S_ISBLK(mode)) 1399531b1094SLatchesar Ionkov sprintf(name, "b %u %u", MAJOR(rdev), MINOR(rdev)); 14002bad8471SEric Van Hensbergen else if (S_ISCHR(mode)) 1401531b1094SLatchesar Ionkov sprintf(name, "c %u %u", MAJOR(rdev), MINOR(rdev)); 1402b46c267eSAl Viro else 1403531b1094SLatchesar Ionkov *name = 0; 14042bad8471SEric Van Hensbergen 1405c2837de7SAl Viro perm = unixmode2p9mode(v9ses, mode); 1406c2837de7SAl Viro retval = v9fs_vfs_mkspecial(dir, dentry, perm, name); 14072bad8471SEric Van Hensbergen 14082bad8471SEric Van Hensbergen return retval; 14092bad8471SEric Van Hensbergen } 14102bad8471SEric Van Hensbergen 1411b3cbea03SAneesh Kumar K.V int v9fs_refresh_inode(struct p9_fid *fid, struct inode *inode) 1412b3cbea03SAneesh Kumar K.V { 141345089142SAneesh Kumar K.V int umode; 141445089142SAneesh Kumar K.V dev_t rdev; 1415b3cbea03SAneesh Kumar K.V struct p9_wstat *st; 1416b3cbea03SAneesh Kumar K.V struct v9fs_session_info *v9ses; 14175e3cc1eeSHou Tao unsigned int flags; 1418b3cbea03SAneesh Kumar K.V 1419b3cbea03SAneesh Kumar K.V v9ses = v9fs_inode2v9ses(inode); 1420b3cbea03SAneesh Kumar K.V st = p9_client_stat(fid); 1421b3cbea03SAneesh Kumar K.V if (IS_ERR(st)) 1422b3cbea03SAneesh Kumar K.V return PTR_ERR(st); 142345089142SAneesh Kumar K.V /* 142445089142SAneesh Kumar K.V * Don't update inode if the file type is different 142545089142SAneesh Kumar K.V */ 142645089142SAneesh Kumar K.V umode = p9mode2unixmode(v9ses, st, &rdev); 142745089142SAneesh Kumar K.V if ((inode->i_mode & S_IFMT) != (umode & S_IFMT)) 142845089142SAneesh Kumar K.V goto out; 1429b3cbea03SAneesh Kumar K.V 1430b3cbea03SAneesh Kumar K.V /* 1431b3cbea03SAneesh Kumar K.V * We don't want to refresh inode->i_size, 1432b3cbea03SAneesh Kumar K.V * because we may have cached data 1433b3cbea03SAneesh Kumar K.V */ 14345e3cc1eeSHou Tao flags = (v9ses->cache == CACHE_LOOSE || v9ses->cache == CACHE_FSCACHE) ? 14355e3cc1eeSHou Tao V9FS_STAT2INODE_KEEP_ISIZE : 0; 14365e3cc1eeSHou Tao v9fs_stat2inode(st, inode, inode->i_sb, flags); 143745089142SAneesh Kumar K.V out: 1438b3cbea03SAneesh Kumar K.V p9stat_free(st); 1439b3cbea03SAneesh Kumar K.V kfree(st); 1440b3cbea03SAneesh Kumar K.V return 0; 1441b3cbea03SAneesh Kumar K.V } 1442b3cbea03SAneesh Kumar K.V 14439b6533c9SSripathi Kodi static const struct inode_operations v9fs_dir_inode_operations_dotu = { 14449b6533c9SSripathi Kodi .create = v9fs_vfs_create, 14459b6533c9SSripathi Kodi .lookup = v9fs_vfs_lookup, 1446e43ae79cSMiklos Szeredi .atomic_open = v9fs_vfs_atomic_open, 14479b6533c9SSripathi Kodi .symlink = v9fs_vfs_symlink, 144850cc42ffSVenkateswararao Jujjuri (JV) .link = v9fs_vfs_link, 14499b6533c9SSripathi Kodi .unlink = v9fs_vfs_unlink, 14509b6533c9SSripathi Kodi .mkdir = v9fs_vfs_mkdir, 14519b6533c9SSripathi Kodi .rmdir = v9fs_vfs_rmdir, 14521d76e313SAneesh Kumar K.V .mknod = v9fs_vfs_mknod, 14539b6533c9SSripathi Kodi .rename = v9fs_vfs_rename, 14549b6533c9SSripathi Kodi .getattr = v9fs_vfs_getattr, 14559b6533c9SSripathi Kodi .setattr = v9fs_vfs_setattr, 14569b6533c9SSripathi Kodi }; 14579b6533c9SSripathi Kodi 1458754661f1SArjan van de Ven static const struct inode_operations v9fs_dir_inode_operations = { 1459b501611aSEric Van Hensbergen .create = v9fs_vfs_create, 1460b501611aSEric Van Hensbergen .lookup = v9fs_vfs_lookup, 1461e43ae79cSMiklos Szeredi .atomic_open = v9fs_vfs_atomic_open, 1462b501611aSEric Van Hensbergen .unlink = v9fs_vfs_unlink, 1463b501611aSEric Van Hensbergen .mkdir = v9fs_vfs_mkdir, 1464b501611aSEric Van Hensbergen .rmdir = v9fs_vfs_rmdir, 1465b501611aSEric Van Hensbergen .mknod = v9fs_vfs_mknod, 1466b501611aSEric Van Hensbergen .rename = v9fs_vfs_rename, 1467b501611aSEric Van Hensbergen .getattr = v9fs_vfs_getattr, 1468b501611aSEric Van Hensbergen .setattr = v9fs_vfs_setattr, 1469b501611aSEric Van Hensbergen }; 1470b501611aSEric Van Hensbergen 1471754661f1SArjan van de Ven static const struct inode_operations v9fs_file_inode_operations = { 14722bad8471SEric Van Hensbergen .getattr = v9fs_vfs_getattr, 14732bad8471SEric Van Hensbergen .setattr = v9fs_vfs_setattr, 14742bad8471SEric Van Hensbergen }; 14752bad8471SEric Van Hensbergen 1476754661f1SArjan van de Ven static const struct inode_operations v9fs_symlink_inode_operations = { 14776b255391SAl Viro .get_link = v9fs_vfs_get_link, 14782bad8471SEric Van Hensbergen .getattr = v9fs_vfs_getattr, 14792bad8471SEric Van Hensbergen .setattr = v9fs_vfs_setattr, 14802bad8471SEric Van Hensbergen }; 14819b6533c9SSripathi Kodi 1482