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 /** 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; 279078cd827SDeepa Dinamani inode->i_atime = inode->i_mtime = inode->i_ctime = current_time(inode); 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 4544ad78628SAl Viro truncate_inode_pages_final(&inode->i_data); 455dbd5768fSJan Kara clear_inode(inode); 4564ad78628SAl Viro filemap_fdatawrite(&inode->i_data); 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; 4868ee03163STuomas Tynkkynen 4878ee03163STuomas Tynkkynen if (v9inode->qid.path != st->qid.path) 4888ee03163STuomas Tynkkynen return 0; 489fd2421f5SAneesh Kumar K.V return 1; 490fd2421f5SAneesh Kumar K.V } 491fd2421f5SAneesh Kumar K.V 492ed80fcfaSAneesh Kumar K.V static int v9fs_test_new_inode(struct inode *inode, void *data) 493ed80fcfaSAneesh Kumar K.V { 494ed80fcfaSAneesh Kumar K.V return 0; 495ed80fcfaSAneesh Kumar K.V } 496ed80fcfaSAneesh Kumar K.V 497fd2421f5SAneesh Kumar K.V static int v9fs_set_inode(struct inode *inode, void *data) 498fd2421f5SAneesh Kumar K.V { 499fd2421f5SAneesh Kumar K.V struct v9fs_inode *v9inode = V9FS_I(inode); 500fd2421f5SAneesh Kumar K.V struct p9_wstat *st = (struct p9_wstat *)data; 501fd2421f5SAneesh Kumar K.V 502fd2421f5SAneesh Kumar K.V memcpy(&v9inode->qid, &st->qid, sizeof(st->qid)); 503fd2421f5SAneesh Kumar K.V return 0; 504fd2421f5SAneesh Kumar K.V } 505fd2421f5SAneesh Kumar K.V 5065ffc0cb3SAneesh Kumar K.V static struct inode *v9fs_qid_iget(struct super_block *sb, 5075ffc0cb3SAneesh Kumar K.V struct p9_qid *qid, 508ed80fcfaSAneesh Kumar K.V struct p9_wstat *st, 509ed80fcfaSAneesh Kumar K.V int new) 5105ffc0cb3SAneesh Kumar K.V { 51145089142SAneesh Kumar K.V dev_t rdev; 5123eda0de6SAl Viro int retval; 5133eda0de6SAl Viro umode_t umode; 5145ffc0cb3SAneesh Kumar K.V unsigned long i_ino; 5155ffc0cb3SAneesh Kumar K.V struct inode *inode; 5165ffc0cb3SAneesh Kumar K.V struct v9fs_session_info *v9ses = sb->s_fs_info; 517ed80fcfaSAneesh Kumar K.V int (*test)(struct inode *, void *); 518ed80fcfaSAneesh Kumar K.V 519ed80fcfaSAneesh Kumar K.V if (new) 520ed80fcfaSAneesh Kumar K.V test = v9fs_test_new_inode; 521ed80fcfaSAneesh Kumar K.V else 522ed80fcfaSAneesh Kumar K.V test = v9fs_test_inode; 5235ffc0cb3SAneesh Kumar K.V 5245ffc0cb3SAneesh Kumar K.V i_ino = v9fs_qid2ino(qid); 525ed80fcfaSAneesh Kumar K.V inode = iget5_locked(sb, i_ino, test, v9fs_set_inode, st); 5265ffc0cb3SAneesh Kumar K.V if (!inode) 5275ffc0cb3SAneesh Kumar K.V return ERR_PTR(-ENOMEM); 5285ffc0cb3SAneesh Kumar K.V if (!(inode->i_state & I_NEW)) 5295ffc0cb3SAneesh Kumar K.V return inode; 5305ffc0cb3SAneesh Kumar K.V /* 5315ffc0cb3SAneesh Kumar K.V * initialize the inode with the stat info 5325ffc0cb3SAneesh Kumar K.V * FIXME!! we may need support for stale inodes 5335ffc0cb3SAneesh Kumar K.V * later. 5345ffc0cb3SAneesh Kumar K.V */ 535fd2421f5SAneesh Kumar K.V inode->i_ino = i_ino; 53645089142SAneesh Kumar K.V umode = p9mode2unixmode(v9ses, st, &rdev); 53745089142SAneesh Kumar K.V retval = v9fs_init_inode(v9ses, inode, umode, rdev); 5385ffc0cb3SAneesh Kumar K.V if (retval) 5395ffc0cb3SAneesh Kumar K.V goto error; 5405ffc0cb3SAneesh Kumar K.V 5415ffc0cb3SAneesh Kumar K.V v9fs_stat2inode(st, inode, sb); 5425ffc0cb3SAneesh Kumar K.V v9fs_cache_inode_get_cookie(inode); 5435ffc0cb3SAneesh Kumar K.V unlock_new_inode(inode); 5445ffc0cb3SAneesh Kumar K.V return inode; 5455ffc0cb3SAneesh Kumar K.V error: 5460a73d0a2SAl Viro iget_failed(inode); 5475ffc0cb3SAneesh Kumar K.V return ERR_PTR(retval); 5485ffc0cb3SAneesh Kumar K.V 5495ffc0cb3SAneesh Kumar K.V } 5505ffc0cb3SAneesh Kumar K.V 55153c06f4eSAneesh Kumar K.V struct inode * 552a78ce05dSAneesh Kumar K.V v9fs_inode_from_fid(struct v9fs_session_info *v9ses, struct p9_fid *fid, 553ed80fcfaSAneesh Kumar K.V struct super_block *sb, int new) 5546a3124a3SLatchesar Ionkov { 55551a87c55SEric Van Hensbergen struct p9_wstat *st; 5565ffc0cb3SAneesh Kumar K.V struct inode *inode = NULL; 5576a3124a3SLatchesar Ionkov 558bd238fb4SLatchesar Ionkov st = p9_client_stat(fid); 55902bc3567SAbhishek Kulkarni if (IS_ERR(st)) 56002bc3567SAbhishek Kulkarni return ERR_CAST(st); 5612bad8471SEric Van Hensbergen 562ed80fcfaSAneesh Kumar K.V inode = v9fs_qid_iget(sb, &st->qid, st, new); 56302bc3567SAbhishek Kulkarni p9stat_free(st); 564bd238fb4SLatchesar Ionkov kfree(st); 5655ffc0cb3SAneesh Kumar K.V return inode; 5662bad8471SEric Van Hensbergen } 5672bad8471SEric Van Hensbergen 5682bad8471SEric Van Hensbergen /** 569f88657ceSAneesh Kumar K.V * v9fs_at_to_dotl_flags- convert Linux specific AT flags to 570f88657ceSAneesh Kumar K.V * plan 9 AT flag. 571f88657ceSAneesh Kumar K.V * @flags: flags to convert 572f88657ceSAneesh Kumar K.V */ 573f88657ceSAneesh Kumar K.V static int v9fs_at_to_dotl_flags(int flags) 574f88657ceSAneesh Kumar K.V { 575f88657ceSAneesh Kumar K.V int rflags = 0; 576f88657ceSAneesh Kumar K.V if (flags & AT_REMOVEDIR) 577f88657ceSAneesh Kumar K.V rflags |= P9_DOTL_AT_REMOVEDIR; 578f88657ceSAneesh Kumar K.V return rflags; 579f88657ceSAneesh Kumar K.V } 580f88657ceSAneesh Kumar K.V 581f88657ceSAneesh Kumar K.V /** 582ac89b2efSEryu Guan * v9fs_dec_count - helper functon to drop i_nlink. 583ac89b2efSEryu Guan * 584ac89b2efSEryu Guan * If a directory had nlink <= 2 (including . and ..), then we should not drop 585ac89b2efSEryu Guan * the link count, which indicates the underlying exported fs doesn't maintain 586ac89b2efSEryu Guan * nlink accurately. e.g. 587ac89b2efSEryu Guan * - overlayfs sets nlink to 1 for merged dir 588ac89b2efSEryu Guan * - ext4 (with dir_nlink feature enabled) sets nlink to 1 if a dir has more 589ac89b2efSEryu Guan * than EXT4_LINK_MAX (65000) links. 590ac89b2efSEryu Guan * 591ac89b2efSEryu Guan * @inode: inode whose nlink is being dropped 592ac89b2efSEryu Guan */ 593ac89b2efSEryu Guan static void v9fs_dec_count(struct inode *inode) 594ac89b2efSEryu Guan { 595ac89b2efSEryu Guan if (!S_ISDIR(inode->i_mode) || inode->i_nlink > 2) 596ac89b2efSEryu Guan drop_nlink(inode); 597ac89b2efSEryu Guan } 598ac89b2efSEryu Guan 599ac89b2efSEryu Guan /** 6002bad8471SEric Van Hensbergen * v9fs_remove - helper function to remove files and directories 60173c592b9SEric Van Hensbergen * @dir: directory inode that is being deleted 60248e370ffSAneesh Kumar K.V * @dentry: dentry that is being deleted 603fd2916bdSFabian Frederick * @flags: removing a directory 6042bad8471SEric Van Hensbergen * 6052bad8471SEric Van Hensbergen */ 6062bad8471SEric Van Hensbergen 60748e370ffSAneesh Kumar K.V static int v9fs_remove(struct inode *dir, struct dentry *dentry, int flags) 6082bad8471SEric Van Hensbergen { 60948e370ffSAneesh Kumar K.V struct inode *inode; 61048e370ffSAneesh Kumar K.V int retval = -EOPNOTSUPP; 61148e370ffSAneesh Kumar K.V struct p9_fid *v9fid, *dfid; 61248e370ffSAneesh Kumar K.V struct v9fs_session_info *v9ses; 6132bad8471SEric Van Hensbergen 6145d385153SJoe Perches p9_debug(P9_DEBUG_VFS, "inode: %p dentry: %p rmdir: %x\n", 61548e370ffSAneesh Kumar K.V dir, dentry, flags); 6162bad8471SEric Van Hensbergen 61748e370ffSAneesh Kumar K.V v9ses = v9fs_inode2v9ses(dir); 6182b0143b5SDavid Howells inode = d_inode(dentry); 61977d5a6b7SAl Viro dfid = v9fs_parent_fid(dentry); 62048e370ffSAneesh Kumar K.V if (IS_ERR(dfid)) { 62148e370ffSAneesh Kumar K.V retval = PTR_ERR(dfid); 6225d385153SJoe Perches p9_debug(P9_DEBUG_VFS, "fid lookup failed %d\n", retval); 62348e370ffSAneesh Kumar K.V return retval; 62448e370ffSAneesh Kumar K.V } 62548e370ffSAneesh Kumar K.V if (v9fs_proto_dotl(v9ses)) 626f88657ceSAneesh Kumar K.V retval = p9_client_unlinkat(dfid, dentry->d_name.name, 627f88657ceSAneesh Kumar K.V v9fs_at_to_dotl_flags(flags)); 62848e370ffSAneesh Kumar K.V if (retval == -EOPNOTSUPP) { 62948e370ffSAneesh Kumar K.V /* Try the one based on path */ 63048e370ffSAneesh Kumar K.V v9fid = v9fs_fid_clone(dentry); 631da977b2cSEric Van Hensbergen if (IS_ERR(v9fid)) 632da977b2cSEric Van Hensbergen return PTR_ERR(v9fid); 633d994f405SAneesh Kumar K.V retval = p9_client_remove(v9fid); 63448e370ffSAneesh Kumar K.V } 635b271ec47SAneesh Kumar K.V if (!retval) { 636b271ec47SAneesh Kumar K.V /* 637b271ec47SAneesh Kumar K.V * directories on unlink should have zero 638b271ec47SAneesh Kumar K.V * link count 639b271ec47SAneesh Kumar K.V */ 64048e370ffSAneesh Kumar K.V if (flags & AT_REMOVEDIR) { 64148e370ffSAneesh Kumar K.V clear_nlink(inode); 642ac89b2efSEryu Guan v9fs_dec_count(dir); 643b271ec47SAneesh Kumar K.V } else 644ac89b2efSEryu Guan v9fs_dec_count(inode); 645d28c61f0SAneesh Kumar K.V 64648e370ffSAneesh Kumar K.V v9fs_invalidate_inode_attr(inode); 647d28c61f0SAneesh Kumar K.V v9fs_invalidate_inode_attr(dir); 648b271ec47SAneesh Kumar K.V } 649d994f405SAneesh Kumar K.V return retval; 6502bad8471SEric Van Hensbergen } 6512bad8471SEric Van Hensbergen 652bd238fb4SLatchesar Ionkov /** 653bd238fb4SLatchesar Ionkov * v9fs_create - Create a file 654ee443996SEric Van Hensbergen * @v9ses: session information 655ee443996SEric Van Hensbergen * @dir: directory that dentry is being created in 656bd238fb4SLatchesar Ionkov * @dentry: dentry that is being created 6570e15597eSAbhishek Kulkarni * @extension: 9p2000.u extension string to support devices, etc. 658bd238fb4SLatchesar Ionkov * @perm: create permissions 659bd238fb4SLatchesar Ionkov * @mode: open mode 660bd238fb4SLatchesar Ionkov * 661bd238fb4SLatchesar Ionkov */ 662bd238fb4SLatchesar Ionkov static struct p9_fid * 663bd238fb4SLatchesar Ionkov v9fs_create(struct v9fs_session_info *v9ses, struct inode *dir, 664bd238fb4SLatchesar Ionkov struct dentry *dentry, char *extension, u32 perm, u8 mode) 665bd238fb4SLatchesar Ionkov { 666bd238fb4SLatchesar Ionkov int err; 6677880b43bSAl Viro const unsigned char *name; 668bd238fb4SLatchesar Ionkov struct p9_fid *dfid, *ofid, *fid; 669bd238fb4SLatchesar Ionkov struct inode *inode; 670bd238fb4SLatchesar Ionkov 6714b8e9923SAl Viro p9_debug(P9_DEBUG_VFS, "name %pd\n", dentry); 67251a87c55SEric Van Hensbergen 673bd238fb4SLatchesar Ionkov err = 0; 674bd238fb4SLatchesar Ionkov ofid = NULL; 675bd238fb4SLatchesar Ionkov fid = NULL; 6767880b43bSAl Viro name = dentry->d_name.name; 67777d5a6b7SAl Viro dfid = v9fs_parent_fid(dentry); 678bd238fb4SLatchesar Ionkov if (IS_ERR(dfid)) { 679bd238fb4SLatchesar Ionkov err = PTR_ERR(dfid); 6805d385153SJoe Perches p9_debug(P9_DEBUG_VFS, "fid lookup failed %d\n", err); 6816d27e64dSVenkateswararao Jujjuri return ERR_PTR(err); 682bd238fb4SLatchesar Ionkov } 683bd238fb4SLatchesar Ionkov 684bd238fb4SLatchesar Ionkov /* clone a fid to use for creation */ 6857d50a29fSAl Viro ofid = clone_fid(dfid); 686bd238fb4SLatchesar Ionkov if (IS_ERR(ofid)) { 687bd238fb4SLatchesar Ionkov err = PTR_ERR(ofid); 6885d385153SJoe Perches p9_debug(P9_DEBUG_VFS, "p9_client_walk failed %d\n", err); 6896d27e64dSVenkateswararao Jujjuri return ERR_PTR(err); 690bd238fb4SLatchesar Ionkov } 691bd238fb4SLatchesar Ionkov 692bd238fb4SLatchesar Ionkov err = p9_client_fcreate(ofid, name, perm, mode, extension); 69351a87c55SEric Van Hensbergen if (err < 0) { 6945d385153SJoe Perches p9_debug(P9_DEBUG_VFS, "p9_client_fcreate failed %d\n", err); 695bd238fb4SLatchesar Ionkov goto error; 69651a87c55SEric Van Hensbergen } 697bd238fb4SLatchesar Ionkov 698b6054793SAneesh Kumar K.V if (!(perm & P9_DMLINK)) { 699bd238fb4SLatchesar Ionkov /* now walk from the parent so we can get unopened fid */ 7006d27e64dSVenkateswararao Jujjuri fid = p9_client_walk(dfid, 1, &name, 1); 701bd238fb4SLatchesar Ionkov if (IS_ERR(fid)) { 702bd238fb4SLatchesar Ionkov err = PTR_ERR(fid); 703b6054793SAneesh Kumar K.V p9_debug(P9_DEBUG_VFS, 704b6054793SAneesh Kumar K.V "p9_client_walk failed %d\n", err); 705bd238fb4SLatchesar Ionkov fid = NULL; 706bd238fb4SLatchesar Ionkov goto error; 7076d27e64dSVenkateswararao Jujjuri } 708b6054793SAneesh Kumar K.V /* 709b6054793SAneesh Kumar K.V * instantiate inode and assign the unopened fid to the dentry 710b6054793SAneesh Kumar K.V */ 711ed80fcfaSAneesh Kumar K.V inode = v9fs_get_new_inode_from_fid(v9ses, fid, dir->i_sb); 712bd238fb4SLatchesar Ionkov if (IS_ERR(inode)) { 713bd238fb4SLatchesar Ionkov err = PTR_ERR(inode); 714b6054793SAneesh Kumar K.V p9_debug(P9_DEBUG_VFS, 715b6054793SAneesh Kumar K.V "inode creation failed %d\n", err); 716bd238fb4SLatchesar Ionkov goto error; 717bd238fb4SLatchesar Ionkov } 7182ea03e1dSAl Viro v9fs_fid_add(dentry, fid); 7195441ae5eSAneesh Kumar K.V d_instantiate(dentry, inode); 720b6054793SAneesh Kumar K.V } 721bd238fb4SLatchesar Ionkov return ofid; 722bd238fb4SLatchesar Ionkov error: 723bd238fb4SLatchesar Ionkov if (ofid) 724bd238fb4SLatchesar Ionkov p9_client_clunk(ofid); 725bd238fb4SLatchesar Ionkov 726bd238fb4SLatchesar Ionkov if (fid) 727bd238fb4SLatchesar Ionkov p9_client_clunk(fid); 728bd238fb4SLatchesar Ionkov 729bd238fb4SLatchesar Ionkov return ERR_PTR(err); 730bd238fb4SLatchesar Ionkov } 731bd238fb4SLatchesar Ionkov 7322bad8471SEric Van Hensbergen /** 733e43ae79cSMiklos Szeredi * v9fs_vfs_create - VFS hook to create a regular file 734e43ae79cSMiklos Szeredi * 735e43ae79cSMiklos Szeredi * open(.., O_CREAT) is handled in v9fs_vfs_atomic_open(). This is only called 736e43ae79cSMiklos Szeredi * for mknod(2). 737e43ae79cSMiklos Szeredi * 738ee443996SEric Van Hensbergen * @dir: directory inode that is being created 7392bad8471SEric Van Hensbergen * @dentry: dentry that is being deleted 7406a3124a3SLatchesar Ionkov * @mode: create permissions 7412bad8471SEric Van Hensbergen * 7422bad8471SEric Van Hensbergen */ 7432bad8471SEric Van Hensbergen 7442bad8471SEric Van Hensbergen static int 7454acdaf27SAl Viro v9fs_vfs_create(struct inode *dir, struct dentry *dentry, umode_t mode, 746ebfc3b49SAl Viro bool excl) 7472bad8471SEric Van Hensbergen { 748e43ae79cSMiklos Szeredi struct v9fs_session_info *v9ses = v9fs_inode2v9ses(dir); 749e43ae79cSMiklos Szeredi u32 perm = unixmode2p9mode(v9ses, mode); 750e43ae79cSMiklos Szeredi struct p9_fid *fid; 7516a3124a3SLatchesar Ionkov 752e43ae79cSMiklos Szeredi /* P9_OEXCL? */ 753e43ae79cSMiklos Szeredi fid = v9fs_create(v9ses, dir, dentry, NULL, perm, P9_ORDWR); 754e43ae79cSMiklos Szeredi if (IS_ERR(fid)) 755e43ae79cSMiklos Szeredi return PTR_ERR(fid); 7566a3124a3SLatchesar Ionkov 757d28c61f0SAneesh Kumar K.V v9fs_invalidate_inode_attr(dir); 758bd238fb4SLatchesar Ionkov p9_client_clunk(fid); 7596a3124a3SLatchesar Ionkov 7606a3124a3SLatchesar Ionkov return 0; 7612bad8471SEric Van Hensbergen } 7622bad8471SEric Van Hensbergen 7632bad8471SEric Van Hensbergen /** 7642bad8471SEric Van Hensbergen * v9fs_vfs_mkdir - VFS mkdir hook to create a directory 765ee443996SEric Van Hensbergen * @dir: inode that is being unlinked 7662bad8471SEric Van Hensbergen * @dentry: dentry that is being unlinked 7672bad8471SEric Van Hensbergen * @mode: mode for new directory 7682bad8471SEric Van Hensbergen * 7692bad8471SEric Van Hensbergen */ 7702bad8471SEric Van Hensbergen 77118bb1db3SAl Viro static int v9fs_vfs_mkdir(struct inode *dir, struct dentry *dentry, umode_t mode) 7722bad8471SEric Van Hensbergen { 7736a3124a3SLatchesar Ionkov int err; 774bd238fb4SLatchesar Ionkov u32 perm; 775bd238fb4SLatchesar Ionkov struct p9_fid *fid; 776d28c61f0SAneesh Kumar K.V struct v9fs_session_info *v9ses; 7776a3124a3SLatchesar Ionkov 7784b8e9923SAl Viro p9_debug(P9_DEBUG_VFS, "name %pd\n", dentry); 779bd238fb4SLatchesar Ionkov err = 0; 7806a3124a3SLatchesar Ionkov v9ses = v9fs_inode2v9ses(dir); 7816a3124a3SLatchesar Ionkov perm = unixmode2p9mode(v9ses, mode | S_IFDIR); 782bd238fb4SLatchesar Ionkov fid = v9fs_create(v9ses, dir, dentry, NULL, perm, P9_OREAD); 783bd238fb4SLatchesar Ionkov if (IS_ERR(fid)) { 784bd238fb4SLatchesar Ionkov err = PTR_ERR(fid); 785bd238fb4SLatchesar Ionkov fid = NULL; 786d28c61f0SAneesh Kumar K.V } else { 787b271ec47SAneesh Kumar K.V inc_nlink(dir); 788d28c61f0SAneesh Kumar K.V v9fs_invalidate_inode_attr(dir); 789d28c61f0SAneesh Kumar K.V } 7906a3124a3SLatchesar Ionkov 791bd238fb4SLatchesar Ionkov if (fid) 792bd238fb4SLatchesar Ionkov p9_client_clunk(fid); 7936a3124a3SLatchesar Ionkov 7946a3124a3SLatchesar Ionkov return err; 7952bad8471SEric Van Hensbergen } 7962bad8471SEric Van Hensbergen 7972bad8471SEric Van Hensbergen /** 7982bad8471SEric Van Hensbergen * v9fs_vfs_lookup - VFS lookup hook to "walk" to a new inode 7992bad8471SEric Van Hensbergen * @dir: inode that is being walked from 8002bad8471SEric Van Hensbergen * @dentry: dentry that is being walked to? 801fd2916bdSFabian Frederick * @flags: lookup flags (unused) 8022bad8471SEric Van Hensbergen * 8032bad8471SEric Van Hensbergen */ 8042bad8471SEric Van Hensbergen 80553c06f4eSAneesh Kumar K.V struct dentry *v9fs_vfs_lookup(struct inode *dir, struct dentry *dentry, 80600cd8dd3SAl Viro unsigned int flags) 8072bad8471SEric Van Hensbergen { 80873f50717SAneesh Kumar K.V struct dentry *res; 8092bad8471SEric Van Hensbergen struct v9fs_session_info *v9ses; 810bd238fb4SLatchesar Ionkov struct p9_fid *dfid, *fid; 8112bad8471SEric Van Hensbergen struct inode *inode; 8127880b43bSAl Viro const unsigned char *name; 8132bad8471SEric Van Hensbergen 8144b8e9923SAl Viro p9_debug(P9_DEBUG_VFS, "dir: %p dentry: (%pd) %p flags: %x\n", 8154b8e9923SAl Viro dir, dentry, dentry, flags); 8162bad8471SEric Van Hensbergen 81711e9b49bSSripathi Kodi if (dentry->d_name.len > NAME_MAX) 81811e9b49bSSripathi Kodi return ERR_PTR(-ENAMETOOLONG); 81911e9b49bSSripathi Kodi 8202bad8471SEric Van Hensbergen v9ses = v9fs_inode2v9ses(dir); 821a534c8d1SAneesh Kumar K.V /* We can walk d_parent because we hold the dir->i_mutex */ 82277d5a6b7SAl Viro dfid = v9fs_parent_fid(dentry); 823bd238fb4SLatchesar Ionkov if (IS_ERR(dfid)) 824e231c2eeSDavid Howells return ERR_CAST(dfid); 8252bad8471SEric Van Hensbergen 82673f50717SAneesh Kumar K.V /* 82773f50717SAneesh Kumar K.V * Make sure we don't use a wrong inode due to parallel 82873f50717SAneesh Kumar K.V * unlink. For cached mode create calls request for new 82973f50717SAneesh Kumar K.V * inode. But with cache disabled, lookup should do this. 83073f50717SAneesh Kumar K.V */ 831500e2ab6SAl Viro name = dentry->d_name.name; 832500e2ab6SAl Viro fid = p9_client_walk(dfid, 1, &name, 1); 833500e2ab6SAl Viro if (fid == ERR_PTR(-ENOENT)) 834500e2ab6SAl Viro inode = NULL; 835500e2ab6SAl Viro else if (IS_ERR(fid)) 836500e2ab6SAl Viro inode = ERR_CAST(fid); 837500e2ab6SAl Viro else if (v9ses->cache == CACHE_LOOSE || v9ses->cache == CACHE_FSCACHE) 838a78ce05dSAneesh Kumar K.V inode = v9fs_get_inode_from_fid(v9ses, fid, dir->i_sb); 83973f50717SAneesh Kumar K.V else 84073f50717SAneesh Kumar K.V inode = v9fs_get_new_inode_from_fid(v9ses, fid, dir->i_sb); 84173f50717SAneesh Kumar K.V /* 84273f50717SAneesh Kumar K.V * If we had a rename on the server and a parallel lookup 84373f50717SAneesh Kumar K.V * for the new name, then make sure we instantiate with 84473f50717SAneesh Kumar K.V * the new name. ie look up for a/b, while on server somebody 84573f50717SAneesh Kumar K.V * moved b under k and client parallely did a lookup for 84673f50717SAneesh Kumar K.V * k/b. 84773f50717SAneesh Kumar K.V */ 84841d28bcaSAl Viro res = d_splice_alias(inode, dentry); 849500e2ab6SAl Viro if (!IS_ERR(fid)) { 850a3b2157eSAl Viro if (!res) 851a3b2157eSAl Viro v9fs_fid_add(dentry, fid); 852a3b2157eSAl Viro else if (!IS_ERR(res)) 853a3b2157eSAl Viro v9fs_fid_add(res, fid); 854a3b2157eSAl Viro else 855bd238fb4SLatchesar Ionkov p9_client_clunk(fid); 856500e2ab6SAl Viro } 8577b5be621SAl Viro return res; 8582bad8471SEric Van Hensbergen } 8592bad8471SEric Van Hensbergen 860d9585277SAl Viro static int 861e43ae79cSMiklos Szeredi v9fs_vfs_atomic_open(struct inode *dir, struct dentry *dentry, 86230d90494SAl Viro struct file *file, unsigned flags, umode_t mode, 86347237687SAl Viro int *opened) 864e43ae79cSMiklos Szeredi { 865e43ae79cSMiklos Szeredi int err; 866e43ae79cSMiklos Szeredi u32 perm; 867e43ae79cSMiklos Szeredi struct v9fs_inode *v9inode; 868e43ae79cSMiklos Szeredi struct v9fs_session_info *v9ses; 869e43ae79cSMiklos Szeredi struct p9_fid *fid, *inode_fid; 870e43ae79cSMiklos Szeredi struct dentry *res = NULL; 871e43ae79cSMiklos Szeredi 87200699ad8SAl Viro if (d_in_lookup(dentry)) { 87300cd8dd3SAl Viro res = v9fs_vfs_lookup(dir, dentry, 0); 874e43ae79cSMiklos Szeredi if (IS_ERR(res)) 875d9585277SAl Viro return PTR_ERR(res); 876e43ae79cSMiklos Szeredi 877e43ae79cSMiklos Szeredi if (res) 878e43ae79cSMiklos Szeredi dentry = res; 879e43ae79cSMiklos Szeredi } 880e43ae79cSMiklos Szeredi 881e43ae79cSMiklos Szeredi /* Only creates */ 8822b0143b5SDavid Howells if (!(flags & O_CREAT) || d_really_is_positive(dentry)) 883e45198a6SAl Viro return finish_no_open(file, res); 884e43ae79cSMiklos Szeredi 885e43ae79cSMiklos Szeredi err = 0; 886fae74696SGeyslan G. Bem 887e43ae79cSMiklos Szeredi v9ses = v9fs_inode2v9ses(dir); 888e43ae79cSMiklos Szeredi perm = unixmode2p9mode(v9ses, mode); 889e43ae79cSMiklos Szeredi fid = v9fs_create(v9ses, dir, dentry, NULL, perm, 890e43ae79cSMiklos Szeredi v9fs_uflags2omode(flags, 891e43ae79cSMiklos Szeredi v9fs_proto_dotu(v9ses))); 892e43ae79cSMiklos Szeredi if (IS_ERR(fid)) { 893e43ae79cSMiklos Szeredi err = PTR_ERR(fid); 894e43ae79cSMiklos Szeredi fid = NULL; 895e43ae79cSMiklos Szeredi goto error; 896e43ae79cSMiklos Szeredi } 897e43ae79cSMiklos Szeredi 898e43ae79cSMiklos Szeredi v9fs_invalidate_inode_attr(dir); 8992b0143b5SDavid Howells v9inode = V9FS_I(d_inode(dentry)); 900e43ae79cSMiklos Szeredi mutex_lock(&v9inode->v_mutex); 901fb89b45cSDominique Martinet if ((v9ses->cache == CACHE_LOOSE || v9ses->cache == CACHE_FSCACHE) && 902fb89b45cSDominique Martinet !v9inode->writeback_fid && 903e43ae79cSMiklos Szeredi ((flags & O_ACCMODE) != O_RDONLY)) { 904e43ae79cSMiklos Szeredi /* 905e43ae79cSMiklos Szeredi * clone a fid and add it to writeback_fid 906e43ae79cSMiklos Szeredi * we do it during open time instead of 907e43ae79cSMiklos Szeredi * page dirty time via write_begin/page_mkwrite 908e43ae79cSMiklos Szeredi * because we want write after unlink usecase 909e43ae79cSMiklos Szeredi * to work. 910e43ae79cSMiklos Szeredi */ 911e43ae79cSMiklos Szeredi inode_fid = v9fs_writeback_fid(dentry); 912e43ae79cSMiklos Szeredi if (IS_ERR(inode_fid)) { 913e43ae79cSMiklos Szeredi err = PTR_ERR(inode_fid); 914e43ae79cSMiklos Szeredi mutex_unlock(&v9inode->v_mutex); 915e43ae79cSMiklos Szeredi goto error; 916e43ae79cSMiklos Szeredi } 917e43ae79cSMiklos Szeredi v9inode->writeback_fid = (void *) inode_fid; 918e43ae79cSMiklos Szeredi } 919e43ae79cSMiklos Szeredi mutex_unlock(&v9inode->v_mutex); 92030d90494SAl Viro err = finish_open(file, dentry, generic_file_open, opened); 92130d90494SAl Viro if (err) 922e43ae79cSMiklos Szeredi goto error; 923e43ae79cSMiklos Szeredi 92430d90494SAl Viro file->private_data = fid; 925fb89b45cSDominique Martinet if (v9ses->cache == CACHE_LOOSE || v9ses->cache == CACHE_FSCACHE) 9262b0143b5SDavid Howells v9fs_cache_inode_set_cookie(d_inode(dentry), file); 927e43ae79cSMiklos Szeredi 92873a09dd9SAl Viro file->f_mode |= FMODE_CREATED; 929e43ae79cSMiklos Szeredi out: 930e43ae79cSMiklos Szeredi dput(res); 931d9585277SAl Viro return err; 932e43ae79cSMiklos Szeredi 933e43ae79cSMiklos Szeredi error: 934e43ae79cSMiklos Szeredi if (fid) 935e43ae79cSMiklos Szeredi p9_client_clunk(fid); 936e43ae79cSMiklos Szeredi goto out; 937e43ae79cSMiklos Szeredi } 938e43ae79cSMiklos Szeredi 9392bad8471SEric Van Hensbergen /** 9402bad8471SEric Van Hensbergen * v9fs_vfs_unlink - VFS unlink hook to delete an inode 9412bad8471SEric Van Hensbergen * @i: inode that is being unlinked 94273c592b9SEric Van Hensbergen * @d: dentry that is being unlinked 9432bad8471SEric Van Hensbergen * 9442bad8471SEric Van Hensbergen */ 9452bad8471SEric Van Hensbergen 94653c06f4eSAneesh Kumar K.V int v9fs_vfs_unlink(struct inode *i, struct dentry *d) 9472bad8471SEric Van Hensbergen { 9482bad8471SEric Van Hensbergen return v9fs_remove(i, d, 0); 9492bad8471SEric Van Hensbergen } 9502bad8471SEric Van Hensbergen 9512bad8471SEric Van Hensbergen /** 9522bad8471SEric Van Hensbergen * v9fs_vfs_rmdir - VFS unlink hook to delete a directory 9532bad8471SEric Van Hensbergen * @i: inode that is being unlinked 95473c592b9SEric Van Hensbergen * @d: dentry that is being unlinked 9552bad8471SEric Van Hensbergen * 9562bad8471SEric Van Hensbergen */ 9572bad8471SEric Van Hensbergen 95853c06f4eSAneesh Kumar K.V int v9fs_vfs_rmdir(struct inode *i, struct dentry *d) 9592bad8471SEric Van Hensbergen { 96048e370ffSAneesh Kumar K.V return v9fs_remove(i, d, AT_REMOVEDIR); 9612bad8471SEric Van Hensbergen } 9622bad8471SEric Van Hensbergen 9632bad8471SEric Van Hensbergen /** 9642bad8471SEric Van Hensbergen * v9fs_vfs_rename - VFS hook to rename an inode 9652bad8471SEric Van Hensbergen * @old_dir: old dir inode 9662bad8471SEric Van Hensbergen * @old_dentry: old dentry 9672bad8471SEric Van Hensbergen * @new_dir: new dir inode 9682bad8471SEric Van Hensbergen * @new_dentry: new dentry 9692bad8471SEric Van Hensbergen * 9702bad8471SEric Van Hensbergen */ 9712bad8471SEric Van Hensbergen 97253c06f4eSAneesh Kumar K.V int 9732bad8471SEric Van Hensbergen v9fs_vfs_rename(struct inode *old_dir, struct dentry *old_dentry, 9741cd66c93SMiklos Szeredi struct inode *new_dir, struct dentry *new_dentry, 9751cd66c93SMiklos Szeredi unsigned int flags) 9762bad8471SEric Van Hensbergen { 977d28c61f0SAneesh Kumar K.V int retval; 978bd238fb4SLatchesar Ionkov struct inode *old_inode; 979b271ec47SAneesh Kumar K.V struct inode *new_inode; 980bd238fb4SLatchesar Ionkov struct v9fs_session_info *v9ses; 981bd238fb4SLatchesar Ionkov struct p9_fid *oldfid; 982bd238fb4SLatchesar Ionkov struct p9_fid *olddirfid; 983bd238fb4SLatchesar Ionkov struct p9_fid *newdirfid; 984bd238fb4SLatchesar Ionkov struct p9_wstat wstat; 9852bad8471SEric Van Hensbergen 9861cd66c93SMiklos Szeredi if (flags) 9871cd66c93SMiklos Szeredi return -EINVAL; 9881cd66c93SMiklos Szeredi 9895d385153SJoe Perches p9_debug(P9_DEBUG_VFS, "\n"); 990bd238fb4SLatchesar Ionkov retval = 0; 9912b0143b5SDavid Howells old_inode = d_inode(old_dentry); 9922b0143b5SDavid Howells new_inode = d_inode(new_dentry); 993bd238fb4SLatchesar Ionkov v9ses = v9fs_inode2v9ses(old_inode); 994bd238fb4SLatchesar Ionkov oldfid = v9fs_fid_lookup(old_dentry); 995da977b2cSEric Van Hensbergen if (IS_ERR(oldfid)) 996da977b2cSEric Van Hensbergen return PTR_ERR(oldfid); 997da977b2cSEric Van Hensbergen 998797fc16dSAl Viro olddirfid = clone_fid(v9fs_parent_fid(old_dentry)); 999da977b2cSEric Van Hensbergen if (IS_ERR(olddirfid)) { 1000da977b2cSEric Van Hensbergen retval = PTR_ERR(olddirfid); 1001bd238fb4SLatchesar Ionkov goto done; 1002da977b2cSEric Van Hensbergen } 1003da977b2cSEric Van Hensbergen 1004797fc16dSAl Viro newdirfid = clone_fid(v9fs_parent_fid(new_dentry)); 1005da977b2cSEric Van Hensbergen if (IS_ERR(newdirfid)) { 1006da977b2cSEric Van Hensbergen retval = PTR_ERR(newdirfid); 1007bd238fb4SLatchesar Ionkov goto clunk_olddir; 10082bad8471SEric Van Hensbergen } 10092bad8471SEric Van Hensbergen 1010a534c8d1SAneesh Kumar K.V down_write(&v9ses->rename_sem); 10114681dbdaSSripathi Kodi if (v9fs_proto_dotl(v9ses)) { 10129e8fb38eSAneesh Kumar K.V retval = p9_client_renameat(olddirfid, old_dentry->d_name.name, 10139e8fb38eSAneesh Kumar K.V newdirfid, new_dentry->d_name.name); 10149e8fb38eSAneesh Kumar K.V if (retval == -EOPNOTSUPP) 10154681dbdaSSripathi Kodi retval = p9_client_rename(oldfid, newdirfid, 10169e8fb38eSAneesh Kumar K.V new_dentry->d_name.name); 10179e8fb38eSAneesh Kumar K.V if (retval != -EOPNOTSUPP) 10184681dbdaSSripathi Kodi goto clunk_newdir; 10194681dbdaSSripathi Kodi } 1020a534c8d1SAneesh Kumar K.V if (old_dentry->d_parent != new_dentry->d_parent) { 1021a534c8d1SAneesh Kumar K.V /* 1022a534c8d1SAneesh Kumar K.V * 9P .u can only handle file rename in the same directory 1023a534c8d1SAneesh Kumar K.V */ 10244681dbdaSSripathi Kodi 10255d385153SJoe Perches p9_debug(P9_DEBUG_ERROR, "old dir and new dir are different\n"); 1026621997cdSEric Van Hensbergen retval = -EXDEV; 1027bd238fb4SLatchesar Ionkov goto clunk_newdir; 10282bad8471SEric Van Hensbergen } 1029531b1094SLatchesar Ionkov v9fs_blank_wstat(&wstat); 1030ba17674fSLatchesar Ionkov wstat.muid = v9ses->uname; 10317880b43bSAl Viro wstat.name = new_dentry->d_name.name; 1032bd238fb4SLatchesar Ionkov retval = p9_client_wstat(oldfid, &wstat); 10332bad8471SEric Van Hensbergen 1034bd238fb4SLatchesar Ionkov clunk_newdir: 1035b271ec47SAneesh Kumar K.V if (!retval) { 1036b271ec47SAneesh Kumar K.V if (new_inode) { 1037b271ec47SAneesh Kumar K.V if (S_ISDIR(new_inode->i_mode)) 1038b271ec47SAneesh Kumar K.V clear_nlink(new_inode); 1039b271ec47SAneesh Kumar K.V else 1040ac89b2efSEryu Guan v9fs_dec_count(new_inode); 1041b271ec47SAneesh Kumar K.V } 1042b271ec47SAneesh Kumar K.V if (S_ISDIR(old_inode->i_mode)) { 1043b271ec47SAneesh Kumar K.V if (!new_inode) 1044b271ec47SAneesh Kumar K.V inc_nlink(new_dir); 1045ac89b2efSEryu Guan v9fs_dec_count(old_dir); 1046b271ec47SAneesh Kumar K.V } 10473bc86de3SAneesh Kumar K.V v9fs_invalidate_inode_attr(old_inode); 1048d28c61f0SAneesh Kumar K.V v9fs_invalidate_inode_attr(old_dir); 1049d28c61f0SAneesh Kumar K.V v9fs_invalidate_inode_attr(new_dir); 10503bc86de3SAneesh Kumar K.V 1051a534c8d1SAneesh Kumar K.V /* successful rename */ 1052a534c8d1SAneesh Kumar K.V d_move(old_dentry, new_dentry); 1053b271ec47SAneesh Kumar K.V } 1054a534c8d1SAneesh Kumar K.V up_write(&v9ses->rename_sem); 105522150c4fSLatchesar Ionkov p9_client_clunk(newdirfid); 10562bad8471SEric Van Hensbergen 1057bd238fb4SLatchesar Ionkov clunk_olddir: 105822150c4fSLatchesar Ionkov p9_client_clunk(olddirfid); 10592bad8471SEric Van Hensbergen 1060bd238fb4SLatchesar Ionkov done: 10612bad8471SEric Van Hensbergen return retval; 10622bad8471SEric Van Hensbergen } 10632bad8471SEric Van Hensbergen 10642bad8471SEric Van Hensbergen /** 1065943ffb58SAdrian Bunk * v9fs_vfs_getattr - retrieve file metadata 1066a528d35eSDavid Howells * @path: Object to query 1067ee443996SEric Van Hensbergen * @stat: metadata structure to populate 1068a528d35eSDavid Howells * @request_mask: Mask of STATX_xxx flags indicating the caller's interests 1069a528d35eSDavid Howells * @flags: AT_STATX_xxx setting 10702bad8471SEric Van Hensbergen * 10712bad8471SEric Van Hensbergen */ 10722bad8471SEric Van Hensbergen 10732bad8471SEric Van Hensbergen static int 1074a528d35eSDavid Howells v9fs_vfs_getattr(const struct path *path, struct kstat *stat, 1075a528d35eSDavid Howells u32 request_mask, unsigned int flags) 10762bad8471SEric Van Hensbergen { 1077a528d35eSDavid Howells struct dentry *dentry = path->dentry; 1078bd238fb4SLatchesar Ionkov struct v9fs_session_info *v9ses; 1079bd238fb4SLatchesar Ionkov struct p9_fid *fid; 108051a87c55SEric Van Hensbergen struct p9_wstat *st; 10812bad8471SEric Van Hensbergen 10825d385153SJoe Perches p9_debug(P9_DEBUG_VFS, "dentry: %p\n", dentry); 108342869c8aSAneesh Kumar K.V v9ses = v9fs_dentry2v9ses(dentry); 1084a1211908SAneesh Kumar K.V if (v9ses->cache == CACHE_LOOSE || v9ses->cache == CACHE_FSCACHE) { 10852b0143b5SDavid Howells generic_fillattr(d_inode(dentry), stat); 1086a1211908SAneesh Kumar K.V return 0; 1087a1211908SAneesh Kumar K.V } 1088bd238fb4SLatchesar Ionkov fid = v9fs_fid_lookup(dentry); 1089da977b2cSEric Van Hensbergen if (IS_ERR(fid)) 1090da977b2cSEric Van Hensbergen return PTR_ERR(fid); 10912bad8471SEric Van Hensbergen 1092bd238fb4SLatchesar Ionkov st = p9_client_stat(fid); 1093bd238fb4SLatchesar Ionkov if (IS_ERR(st)) 1094bd238fb4SLatchesar Ionkov return PTR_ERR(st); 10952bad8471SEric Van Hensbergen 1096fc64005cSAl Viro v9fs_stat2inode(st, d_inode(dentry), dentry->d_sb); 10972b0143b5SDavid Howells generic_fillattr(d_inode(dentry), stat); 10982bad8471SEric Van Hensbergen 109962b2be59SLatchesar Ionkov p9stat_free(st); 1100bd238fb4SLatchesar Ionkov kfree(st); 1101bd238fb4SLatchesar Ionkov return 0; 11022bad8471SEric Van Hensbergen } 11032bad8471SEric Van Hensbergen 11042bad8471SEric Van Hensbergen /** 11052bad8471SEric Van Hensbergen * v9fs_vfs_setattr - set file metadata 11062bad8471SEric Van Hensbergen * @dentry: file whose metadata to set 11072bad8471SEric Van Hensbergen * @iattr: metadata assignment structure 11082bad8471SEric Van Hensbergen * 11092bad8471SEric Van Hensbergen */ 11102bad8471SEric Van Hensbergen 11112bad8471SEric Van Hensbergen static int v9fs_vfs_setattr(struct dentry *dentry, struct iattr *iattr) 11122bad8471SEric Van Hensbergen { 1113bd238fb4SLatchesar Ionkov int retval; 1114bd238fb4SLatchesar Ionkov struct v9fs_session_info *v9ses; 1115bd238fb4SLatchesar Ionkov struct p9_fid *fid; 1116bd238fb4SLatchesar Ionkov struct p9_wstat wstat; 11172bad8471SEric Van Hensbergen 11185d385153SJoe Perches p9_debug(P9_DEBUG_VFS, "\n"); 111931051c85SJan Kara retval = setattr_prepare(dentry, iattr); 1120059c138bSAneesh Kumar K.V if (retval) 1121059c138bSAneesh Kumar K.V return retval; 1122059c138bSAneesh Kumar K.V 1123bd238fb4SLatchesar Ionkov retval = -EPERM; 112442869c8aSAneesh Kumar K.V v9ses = v9fs_dentry2v9ses(dentry); 1125bd238fb4SLatchesar Ionkov fid = v9fs_fid_lookup(dentry); 1126da977b2cSEric Van Hensbergen if(IS_ERR(fid)) 1127da977b2cSEric Van Hensbergen return PTR_ERR(fid); 11282bad8471SEric Van Hensbergen 1129531b1094SLatchesar Ionkov v9fs_blank_wstat(&wstat); 11302bad8471SEric Van Hensbergen if (iattr->ia_valid & ATTR_MODE) 1131531b1094SLatchesar Ionkov wstat.mode = unixmode2p9mode(v9ses, iattr->ia_mode); 11322bad8471SEric Van Hensbergen 11332bad8471SEric Van Hensbergen if (iattr->ia_valid & ATTR_MTIME) 1134531b1094SLatchesar Ionkov wstat.mtime = iattr->ia_mtime.tv_sec; 11352bad8471SEric Van Hensbergen 11362bad8471SEric Van Hensbergen if (iattr->ia_valid & ATTR_ATIME) 1137531b1094SLatchesar Ionkov wstat.atime = iattr->ia_atime.tv_sec; 11382bad8471SEric Van Hensbergen 11392bad8471SEric Van Hensbergen if (iattr->ia_valid & ATTR_SIZE) 1140531b1094SLatchesar Ionkov wstat.length = iattr->ia_size; 11412bad8471SEric Van Hensbergen 1142dd6102fbSSripathi Kodi if (v9fs_proto_dotu(v9ses)) { 1143531b1094SLatchesar Ionkov if (iattr->ia_valid & ATTR_UID) 1144531b1094SLatchesar Ionkov wstat.n_uid = iattr->ia_uid; 11452bad8471SEric Van Hensbergen 1146531b1094SLatchesar Ionkov if (iattr->ia_valid & ATTR_GID) 1147531b1094SLatchesar Ionkov wstat.n_gid = iattr->ia_gid; 11482bad8471SEric Van Hensbergen } 1149059c138bSAneesh Kumar K.V 11503dc5436aSAneesh Kumar K.V /* Write all dirty data */ 1151e36cb0b8SDavid Howells if (d_is_reg(dentry)) 11522b0143b5SDavid Howells filemap_write_and_wait(d_inode(dentry)->i_mapping); 11533dc5436aSAneesh Kumar K.V 1154f10fc50fSAneesh Kumar K.V retval = p9_client_wstat(fid, &wstat); 1155f10fc50fSAneesh Kumar K.V if (retval < 0) 1156f10fc50fSAneesh Kumar K.V return retval; 1157059c138bSAneesh Kumar K.V 1158059c138bSAneesh Kumar K.V if ((iattr->ia_valid & ATTR_SIZE) && 11592b0143b5SDavid Howells iattr->ia_size != i_size_read(d_inode(dentry))) 11602b0143b5SDavid Howells truncate_setsize(d_inode(dentry), iattr->ia_size); 1161059c138bSAneesh Kumar K.V 11622b0143b5SDavid Howells v9fs_invalidate_inode_attr(d_inode(dentry)); 11631025774cSChristoph Hellwig 11642b0143b5SDavid Howells setattr_copy(d_inode(dentry), iattr); 11652b0143b5SDavid Howells mark_inode_dirty(d_inode(dentry)); 11661025774cSChristoph Hellwig return 0; 11672bad8471SEric Van Hensbergen } 11682bad8471SEric Van Hensbergen 11692bad8471SEric Van Hensbergen /** 1170531b1094SLatchesar Ionkov * v9fs_stat2inode - populate an inode structure with mistat info 1171531b1094SLatchesar Ionkov * @stat: Plan 9 metadata (mistat) structure 11722bad8471SEric Van Hensbergen * @inode: inode to populate 11732bad8471SEric Van Hensbergen * @sb: superblock of filesystem 11742bad8471SEric Van Hensbergen * 11752bad8471SEric Van Hensbergen */ 11762bad8471SEric Van Hensbergen 11772bad8471SEric Van Hensbergen void 117851a87c55SEric Van Hensbergen v9fs_stat2inode(struct p9_wstat *stat, struct inode *inode, 11792bad8471SEric Van Hensbergen struct super_block *sb) 11802bad8471SEric Van Hensbergen { 11813eda0de6SAl Viro umode_t mode; 1182531b1094SLatchesar Ionkov char ext[32]; 11835717144aSAneesh Kumar K.V char tag_name[14]; 11845717144aSAneesh Kumar K.V unsigned int i_nlink; 11852bad8471SEric Van Hensbergen struct v9fs_session_info *v9ses = sb->s_fs_info; 1186b3cbea03SAneesh Kumar K.V struct v9fs_inode *v9inode = V9FS_I(inode); 11872bad8471SEric Van Hensbergen 1188bfe86848SMiklos Szeredi set_nlink(inode, 1); 11892bad8471SEric Van Hensbergen 1190531b1094SLatchesar Ionkov inode->i_atime.tv_sec = stat->atime; 1191531b1094SLatchesar Ionkov inode->i_mtime.tv_sec = stat->mtime; 1192531b1094SLatchesar Ionkov inode->i_ctime.tv_sec = stat->mtime; 11932bad8471SEric Van Hensbergen 1194bd32b82dSLatchesar Ionkov inode->i_uid = v9ses->dfltuid; 1195bd32b82dSLatchesar Ionkov inode->i_gid = v9ses->dfltgid; 11962bad8471SEric Van Hensbergen 1197dd6102fbSSripathi Kodi if (v9fs_proto_dotu(v9ses)) { 1198531b1094SLatchesar Ionkov inode->i_uid = stat->n_uid; 1199531b1094SLatchesar Ionkov inode->i_gid = stat->n_gid; 1200531b1094SLatchesar Ionkov } 12015717144aSAneesh Kumar K.V if ((S_ISREG(inode->i_mode)) || (S_ISDIR(inode->i_mode))) { 12025717144aSAneesh Kumar K.V if (v9fs_proto_dotu(v9ses) && (stat->extension[0] != '\0')) { 12035717144aSAneesh Kumar K.V /* 12045717144aSAneesh Kumar K.V * Hadlink support got added later to 12055717144aSAneesh Kumar K.V * to the .u extension. So there can be 12065717144aSAneesh Kumar K.V * server out there that doesn't support 12075717144aSAneesh Kumar K.V * this even with .u extension. So check 12085717144aSAneesh Kumar K.V * for non NULL stat->extension 12095717144aSAneesh Kumar K.V */ 1210b3f8ab4bSChen Gang strlcpy(ext, stat->extension, sizeof(ext)); 12115717144aSAneesh Kumar K.V /* HARDLINKCOUNT %u */ 12125717144aSAneesh Kumar K.V sscanf(ext, "%13s %u", tag_name, &i_nlink); 12135717144aSAneesh Kumar K.V if (!strncmp(tag_name, "HARDLINKCOUNT", 13)) 1214bfe86848SMiklos Szeredi set_nlink(inode, i_nlink); 12155717144aSAneesh Kumar K.V } 12165717144aSAneesh Kumar K.V } 1217df345c67SAneesh Kumar K.V mode = p9mode2perm(v9ses, stat); 121845089142SAneesh Kumar K.V mode |= inode->i_mode & ~S_IALLUGO; 121945089142SAneesh Kumar K.V inode->i_mode = mode; 12207549ae3eSAbhishek Kulkarni i_size_write(inode, stat->length); 12212bad8471SEric Van Hensbergen 1222bd238fb4SLatchesar Ionkov /* not real number of blocks, but 512 byte ones ... */ 12237549ae3eSAbhishek Kulkarni inode->i_blocks = (i_size_read(inode) + 512 - 1) >> 9; 1224b3cbea03SAneesh Kumar K.V v9inode->cache_validity &= ~V9FS_INO_INVALID_ATTR; 12252bad8471SEric Van Hensbergen } 12262bad8471SEric Van Hensbergen 12272bad8471SEric Van Hensbergen /** 12282bad8471SEric Van Hensbergen * v9fs_qid2ino - convert qid into inode number 12292bad8471SEric Van Hensbergen * @qid: qid to hash 12302bad8471SEric Van Hensbergen * 12312bad8471SEric Van Hensbergen * BUG: potential for inode number collisions? 12322bad8471SEric Van Hensbergen */ 12332bad8471SEric Van Hensbergen 1234bd238fb4SLatchesar Ionkov ino_t v9fs_qid2ino(struct p9_qid *qid) 12352bad8471SEric Van Hensbergen { 12362bad8471SEric Van Hensbergen u64 path = qid->path + 2; 12372bad8471SEric Van Hensbergen ino_t i = 0; 12382bad8471SEric Van Hensbergen 12392bad8471SEric Van Hensbergen if (sizeof(ino_t) == sizeof(path)) 12402bad8471SEric Van Hensbergen memcpy(&i, &path, sizeof(ino_t)); 12412bad8471SEric Van Hensbergen else 12422bad8471SEric Van Hensbergen i = (ino_t) (path ^ (path >> 32)); 12432bad8471SEric Van Hensbergen 12442bad8471SEric Van Hensbergen return i; 12452bad8471SEric Van Hensbergen } 12462bad8471SEric Van Hensbergen 12472bad8471SEric Van Hensbergen /** 12486b255391SAl Viro * v9fs_vfs_get_link - follow a symlink path 12492bad8471SEric Van Hensbergen * @dentry: dentry for symlink 12506b255391SAl Viro * @inode: inode for symlink 1251fceef393SAl Viro * @done: delayed call for when we are done with the return value 12522bad8471SEric Van Hensbergen */ 12532bad8471SEric Van Hensbergen 12546b255391SAl Viro static const char *v9fs_vfs_get_link(struct dentry *dentry, 1255fceef393SAl Viro struct inode *inode, 1256fceef393SAl Viro struct delayed_call *done) 12572bad8471SEric Van Hensbergen { 12586b255391SAl Viro struct v9fs_session_info *v9ses; 12596b255391SAl Viro struct p9_fid *fid; 126090e4fc88SAl Viro struct p9_wstat *st; 1261680baacbSAl Viro char *res; 12622bad8471SEric Van Hensbergen 12636b255391SAl Viro if (!dentry) 12646b255391SAl Viro return ERR_PTR(-ECHILD); 12656b255391SAl Viro 12666b255391SAl Viro v9ses = v9fs_dentry2v9ses(dentry); 12676b255391SAl Viro fid = v9fs_fid_lookup(dentry); 12684b8e9923SAl Viro p9_debug(P9_DEBUG_VFS, "%pd\n", dentry); 12692bad8471SEric Van Hensbergen 127090e4fc88SAl Viro if (IS_ERR(fid)) 127190e4fc88SAl Viro return ERR_CAST(fid); 12722bad8471SEric Van Hensbergen 127390e4fc88SAl Viro if (!v9fs_proto_dotu(v9ses)) 127490e4fc88SAl Viro return ERR_PTR(-EBADF); 127590e4fc88SAl Viro 127690e4fc88SAl Viro st = p9_client_stat(fid); 127790e4fc88SAl Viro if (IS_ERR(st)) 127890e4fc88SAl Viro return ERR_CAST(st); 127990e4fc88SAl Viro 128090e4fc88SAl Viro if (!(st->mode & P9_DMSYMLINK)) { 128190e4fc88SAl Viro p9stat_free(st); 128290e4fc88SAl Viro kfree(st); 128390e4fc88SAl Viro return ERR_PTR(-EINVAL); 12842bad8471SEric Van Hensbergen } 1285680baacbSAl Viro res = st->extension; 128690e4fc88SAl Viro st->extension = NULL; 1287680baacbSAl Viro if (strlen(res) >= PATH_MAX) 1288680baacbSAl Viro res[PATH_MAX - 1] = '\0'; 1289680baacbSAl Viro 129090e4fc88SAl Viro p9stat_free(st); 129190e4fc88SAl Viro kfree(st); 1292fceef393SAl Viro set_delayed_call(done, kfree_link, res); 1293fceef393SAl Viro return res; 12942bad8471SEric Van Hensbergen } 12952bad8471SEric Van Hensbergen 12962bad8471SEric Van Hensbergen /** 1297ee443996SEric Van Hensbergen * v9fs_vfs_mkspecial - create a special file 1298ee443996SEric Van Hensbergen * @dir: inode to create special file in 1299ee443996SEric Van Hensbergen * @dentry: dentry to create 1300fd2916bdSFabian Frederick * @perm: mode to create special file 1301ee443996SEric Van Hensbergen * @extension: 9p2000.u format extension string representing special file 1302ee443996SEric Van Hensbergen * 1303ee443996SEric Van Hensbergen */ 1304ee443996SEric Van Hensbergen 1305531b1094SLatchesar Ionkov static int v9fs_vfs_mkspecial(struct inode *dir, struct dentry *dentry, 1306c2837de7SAl Viro u32 perm, const char *extension) 1307531b1094SLatchesar Ionkov { 1308bd238fb4SLatchesar Ionkov struct p9_fid *fid; 1309d28c61f0SAneesh Kumar K.V struct v9fs_session_info *v9ses; 1310531b1094SLatchesar Ionkov 13116a3124a3SLatchesar Ionkov v9ses = v9fs_inode2v9ses(dir); 1312dd6102fbSSripathi Kodi if (!v9fs_proto_dotu(v9ses)) { 13135d385153SJoe Perches p9_debug(P9_DEBUG_ERROR, "not extended\n"); 13146a3124a3SLatchesar Ionkov return -EPERM; 1315531b1094SLatchesar Ionkov } 1316531b1094SLatchesar Ionkov 1317bd238fb4SLatchesar Ionkov fid = v9fs_create(v9ses, dir, dentry, (char *) extension, perm, 1318bd238fb4SLatchesar Ionkov P9_OREAD); 1319bd238fb4SLatchesar Ionkov if (IS_ERR(fid)) 1320bd238fb4SLatchesar Ionkov return PTR_ERR(fid); 1321da977b2cSEric Van Hensbergen 1322d28c61f0SAneesh Kumar K.V v9fs_invalidate_inode_attr(dir); 1323bd238fb4SLatchesar Ionkov p9_client_clunk(fid); 13246a3124a3SLatchesar Ionkov return 0; 1325531b1094SLatchesar Ionkov } 1326531b1094SLatchesar Ionkov 1327531b1094SLatchesar Ionkov /** 1328531b1094SLatchesar Ionkov * v9fs_vfs_symlink - helper function to create symlinks 1329531b1094SLatchesar Ionkov * @dir: directory inode containing symlink 1330531b1094SLatchesar Ionkov * @dentry: dentry for symlink 1331531b1094SLatchesar Ionkov * @symname: symlink data 1332531b1094SLatchesar Ionkov * 1333ee443996SEric Van Hensbergen * See Also: 9P2000.u RFC for more information 1334531b1094SLatchesar Ionkov * 1335531b1094SLatchesar Ionkov */ 1336531b1094SLatchesar Ionkov 1337531b1094SLatchesar Ionkov static int 1338531b1094SLatchesar Ionkov v9fs_vfs_symlink(struct inode *dir, struct dentry *dentry, const char *symname) 1339531b1094SLatchesar Ionkov { 13404b8e9923SAl Viro p9_debug(P9_DEBUG_VFS, " %lu,%pd,%s\n", 13414b8e9923SAl Viro dir->i_ino, dentry, symname); 1342531b1094SLatchesar Ionkov 1343c2837de7SAl Viro return v9fs_vfs_mkspecial(dir, dentry, P9_DMSYMLINK, symname); 1344531b1094SLatchesar Ionkov } 1345531b1094SLatchesar Ionkov 1346b46c267eSAl Viro #define U32_MAX_DIGITS 10 1347b46c267eSAl Viro 13482bad8471SEric Van Hensbergen /** 13492bad8471SEric Van Hensbergen * v9fs_vfs_link - create a hardlink 13502bad8471SEric Van Hensbergen * @old_dentry: dentry for file to link to 13512bad8471SEric Van Hensbergen * @dir: inode destination for new link 135273c592b9SEric Van Hensbergen * @dentry: dentry for link 13532bad8471SEric Van Hensbergen * 13542bad8471SEric Van Hensbergen */ 13552bad8471SEric Van Hensbergen 13562bad8471SEric Van Hensbergen static int 13572bad8471SEric Van Hensbergen v9fs_vfs_link(struct dentry *old_dentry, struct inode *dir, 13582bad8471SEric Van Hensbergen struct dentry *dentry) 13592bad8471SEric Van Hensbergen { 1360531b1094SLatchesar Ionkov int retval; 1361b46c267eSAl Viro char name[1 + U32_MAX_DIGITS + 2]; /* sign + number + \n + \0 */ 1362d28c61f0SAneesh Kumar K.V struct p9_fid *oldfid; 13632bad8471SEric Van Hensbergen 13644b8e9923SAl Viro p9_debug(P9_DEBUG_VFS, " %lu,%pd,%pd\n", 13654b8e9923SAl Viro dir->i_ino, dentry, old_dentry); 13662bad8471SEric Van Hensbergen 1367da977b2cSEric Van Hensbergen oldfid = v9fs_fid_clone(old_dentry); 1368da977b2cSEric Van Hensbergen if (IS_ERR(oldfid)) 1369da977b2cSEric Van Hensbergen return PTR_ERR(oldfid); 13702bad8471SEric Van Hensbergen 137116cce6d2SLatchesar Ionkov sprintf(name, "%d\n", oldfid->fid); 1372bd238fb4SLatchesar Ionkov retval = v9fs_vfs_mkspecial(dir, dentry, P9_DMLINK, name); 1373c06c066aSAneesh Kumar K.V if (!retval) { 13742b0143b5SDavid Howells v9fs_refresh_inode(oldfid, d_inode(old_dentry)); 1375d28c61f0SAneesh Kumar K.V v9fs_invalidate_inode_attr(dir); 1376c06c066aSAneesh Kumar K.V } 1377bd238fb4SLatchesar Ionkov p9_client_clunk(oldfid); 13782bad8471SEric Van Hensbergen return retval; 13792bad8471SEric Van Hensbergen } 13802bad8471SEric Van Hensbergen 13812bad8471SEric Van Hensbergen /** 13822bad8471SEric Van Hensbergen * v9fs_vfs_mknod - create a special file 13832bad8471SEric Van Hensbergen * @dir: inode destination for new link 13842bad8471SEric Van Hensbergen * @dentry: dentry for file 13852bad8471SEric Van Hensbergen * @mode: mode for creation 1386ee443996SEric Van Hensbergen * @rdev: device associated with special file 13872bad8471SEric Van Hensbergen * 13882bad8471SEric Van Hensbergen */ 13892bad8471SEric Van Hensbergen 13902bad8471SEric Van Hensbergen static int 13911a67aafbSAl Viro v9fs_vfs_mknod(struct inode *dir, struct dentry *dentry, umode_t mode, dev_t rdev) 13922bad8471SEric Van Hensbergen { 1393c2837de7SAl Viro struct v9fs_session_info *v9ses = v9fs_inode2v9ses(dir); 1394531b1094SLatchesar Ionkov int retval; 1395b46c267eSAl Viro char name[2 + U32_MAX_DIGITS + 1 + U32_MAX_DIGITS + 1]; 1396c2837de7SAl Viro u32 perm; 13972bad8471SEric Van Hensbergen 13984b8e9923SAl Viro p9_debug(P9_DEBUG_VFS, " %lu,%pd mode: %hx MAJOR: %u MINOR: %u\n", 13994b8e9923SAl Viro dir->i_ino, dentry, mode, 14005d385153SJoe Perches MAJOR(rdev), MINOR(rdev)); 14012bad8471SEric Van Hensbergen 14022bad8471SEric Van Hensbergen /* build extension */ 14032bad8471SEric Van Hensbergen if (S_ISBLK(mode)) 1404531b1094SLatchesar Ionkov sprintf(name, "b %u %u", MAJOR(rdev), MINOR(rdev)); 14052bad8471SEric Van Hensbergen else if (S_ISCHR(mode)) 1406531b1094SLatchesar Ionkov sprintf(name, "c %u %u", MAJOR(rdev), MINOR(rdev)); 1407b46c267eSAl Viro else 1408531b1094SLatchesar Ionkov *name = 0; 14092bad8471SEric Van Hensbergen 1410c2837de7SAl Viro perm = unixmode2p9mode(v9ses, mode); 1411c2837de7SAl Viro retval = v9fs_vfs_mkspecial(dir, dentry, perm, name); 14122bad8471SEric Van Hensbergen 14132bad8471SEric Van Hensbergen return retval; 14142bad8471SEric Van Hensbergen } 14152bad8471SEric Van Hensbergen 1416b3cbea03SAneesh Kumar K.V int v9fs_refresh_inode(struct p9_fid *fid, struct inode *inode) 1417b3cbea03SAneesh Kumar K.V { 141845089142SAneesh Kumar K.V int umode; 141945089142SAneesh Kumar K.V dev_t rdev; 1420b3cbea03SAneesh Kumar K.V loff_t i_size; 1421b3cbea03SAneesh Kumar K.V struct p9_wstat *st; 1422b3cbea03SAneesh Kumar K.V struct v9fs_session_info *v9ses; 1423b3cbea03SAneesh Kumar K.V 1424b3cbea03SAneesh Kumar K.V v9ses = v9fs_inode2v9ses(inode); 1425b3cbea03SAneesh Kumar K.V st = p9_client_stat(fid); 1426b3cbea03SAneesh Kumar K.V if (IS_ERR(st)) 1427b3cbea03SAneesh Kumar K.V return PTR_ERR(st); 142845089142SAneesh Kumar K.V /* 142945089142SAneesh Kumar K.V * Don't update inode if the file type is different 143045089142SAneesh Kumar K.V */ 143145089142SAneesh Kumar K.V umode = p9mode2unixmode(v9ses, st, &rdev); 143245089142SAneesh Kumar K.V if ((inode->i_mode & S_IFMT) != (umode & S_IFMT)) 143345089142SAneesh Kumar K.V goto out; 1434b3cbea03SAneesh Kumar K.V 1435b3cbea03SAneesh Kumar K.V spin_lock(&inode->i_lock); 1436b3cbea03SAneesh Kumar K.V /* 1437b3cbea03SAneesh Kumar K.V * We don't want to refresh inode->i_size, 1438b3cbea03SAneesh Kumar K.V * because we may have cached data 1439b3cbea03SAneesh Kumar K.V */ 1440b3cbea03SAneesh Kumar K.V i_size = inode->i_size; 1441b3cbea03SAneesh Kumar K.V v9fs_stat2inode(st, inode, inode->i_sb); 1442fb89b45cSDominique Martinet if (v9ses->cache == CACHE_LOOSE || v9ses->cache == CACHE_FSCACHE) 1443b3cbea03SAneesh Kumar K.V inode->i_size = i_size; 1444b3cbea03SAneesh Kumar K.V spin_unlock(&inode->i_lock); 144545089142SAneesh Kumar K.V out: 1446b3cbea03SAneesh Kumar K.V p9stat_free(st); 1447b3cbea03SAneesh Kumar K.V kfree(st); 1448b3cbea03SAneesh Kumar K.V return 0; 1449b3cbea03SAneesh Kumar K.V } 1450b3cbea03SAneesh Kumar K.V 14519b6533c9SSripathi Kodi static const struct inode_operations v9fs_dir_inode_operations_dotu = { 14529b6533c9SSripathi Kodi .create = v9fs_vfs_create, 14539b6533c9SSripathi Kodi .lookup = v9fs_vfs_lookup, 1454e43ae79cSMiklos Szeredi .atomic_open = v9fs_vfs_atomic_open, 14559b6533c9SSripathi Kodi .symlink = v9fs_vfs_symlink, 145650cc42ffSVenkateswararao Jujjuri (JV) .link = v9fs_vfs_link, 14579b6533c9SSripathi Kodi .unlink = v9fs_vfs_unlink, 14589b6533c9SSripathi Kodi .mkdir = v9fs_vfs_mkdir, 14599b6533c9SSripathi Kodi .rmdir = v9fs_vfs_rmdir, 14601d76e313SAneesh Kumar K.V .mknod = v9fs_vfs_mknod, 14619b6533c9SSripathi Kodi .rename = v9fs_vfs_rename, 14629b6533c9SSripathi Kodi .getattr = v9fs_vfs_getattr, 14639b6533c9SSripathi Kodi .setattr = v9fs_vfs_setattr, 14649b6533c9SSripathi Kodi }; 14659b6533c9SSripathi Kodi 1466754661f1SArjan van de Ven static const struct inode_operations v9fs_dir_inode_operations = { 1467b501611aSEric Van Hensbergen .create = v9fs_vfs_create, 1468b501611aSEric Van Hensbergen .lookup = v9fs_vfs_lookup, 1469e43ae79cSMiklos Szeredi .atomic_open = v9fs_vfs_atomic_open, 1470b501611aSEric Van Hensbergen .unlink = v9fs_vfs_unlink, 1471b501611aSEric Van Hensbergen .mkdir = v9fs_vfs_mkdir, 1472b501611aSEric Van Hensbergen .rmdir = v9fs_vfs_rmdir, 1473b501611aSEric Van Hensbergen .mknod = v9fs_vfs_mknod, 1474b501611aSEric Van Hensbergen .rename = v9fs_vfs_rename, 1475b501611aSEric Van Hensbergen .getattr = v9fs_vfs_getattr, 1476b501611aSEric Van Hensbergen .setattr = v9fs_vfs_setattr, 1477b501611aSEric Van Hensbergen }; 1478b501611aSEric Van Hensbergen 1479754661f1SArjan van de Ven static const struct inode_operations v9fs_file_inode_operations = { 14802bad8471SEric Van Hensbergen .getattr = v9fs_vfs_getattr, 14812bad8471SEric Van Hensbergen .setattr = v9fs_vfs_setattr, 14822bad8471SEric Van Hensbergen }; 14832bad8471SEric Van Hensbergen 1484754661f1SArjan van de Ven static const struct inode_operations v9fs_symlink_inode_operations = { 14856b255391SAl Viro .get_link = v9fs_vfs_get_link, 14862bad8471SEric Van Hensbergen .getattr = v9fs_vfs_getattr, 14872bad8471SEric Van Hensbergen .setattr = v9fs_vfs_setattr, 14882bad8471SEric Van Hensbergen }; 14899b6533c9SSripathi Kodi 1490