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 262bad8471SEric Van Hensbergen #include <linux/module.h> 272bad8471SEric Van Hensbergen #include <linux/errno.h> 282bad8471SEric Van Hensbergen #include <linux/fs.h> 292bad8471SEric Van Hensbergen #include <linux/file.h> 302bad8471SEric Van Hensbergen #include <linux/pagemap.h> 312bad8471SEric Van Hensbergen #include <linux/stat.h> 322bad8471SEric Van Hensbergen #include <linux/string.h> 332bad8471SEric Van Hensbergen #include <linux/inet.h> 342bad8471SEric Van Hensbergen #include <linux/namei.h> 352bad8471SEric Van Hensbergen #include <linux/idr.h> 36e8edc6e0SAlexey Dobriyan #include <linux/sched.h> 375a0e3ad6STejun Heo #include <linux/slab.h> 38ebf46264SAneesh Kumar K.V #include <linux/xattr.h> 3985ff872dSAneesh Kumar K.V #include <linux/posix_acl.h> 40bd238fb4SLatchesar Ionkov #include <net/9p/9p.h> 41bd238fb4SLatchesar Ionkov #include <net/9p/client.h> 422bad8471SEric Van Hensbergen 432bad8471SEric Van Hensbergen #include "v9fs.h" 442bad8471SEric Van Hensbergen #include "v9fs_vfs.h" 452bad8471SEric Van Hensbergen #include "fid.h" 4660e78d2cSAbhishek Kulkarni #include "cache.h" 47ebf46264SAneesh Kumar K.V #include "xattr.h" 4885ff872dSAneesh Kumar K.V #include "acl.h" 492bad8471SEric Van Hensbergen 50754661f1SArjan van de Ven static const struct inode_operations v9fs_dir_inode_operations; 519b6533c9SSripathi Kodi static const struct inode_operations v9fs_dir_inode_operations_dotu; 52754661f1SArjan van de Ven static const struct inode_operations v9fs_file_inode_operations; 53754661f1SArjan van de Ven static const struct inode_operations v9fs_symlink_inode_operations; 54f5fc6145SAneesh Kumar K.V 552bad8471SEric Van Hensbergen /** 562bad8471SEric Van Hensbergen * unixmode2p9mode - convert unix mode bits to plan 9 572bad8471SEric Van Hensbergen * @v9ses: v9fs session information 582bad8471SEric Van Hensbergen * @mode: mode to convert 592bad8471SEric Van Hensbergen * 602bad8471SEric Van Hensbergen */ 612bad8471SEric Van Hensbergen 6273c592b9SEric Van Hensbergen static int unixmode2p9mode(struct v9fs_session_info *v9ses, int mode) 632bad8471SEric Van Hensbergen { 642bad8471SEric Van Hensbergen int res; 652bad8471SEric Van Hensbergen res = mode & 0777; 662bad8471SEric Van Hensbergen if (S_ISDIR(mode)) 67bd238fb4SLatchesar Ionkov res |= P9_DMDIR; 68dd6102fbSSripathi Kodi if (v9fs_proto_dotu(v9ses)) { 692bad8471SEric Van Hensbergen if (S_ISLNK(mode)) 70bd238fb4SLatchesar Ionkov res |= P9_DMSYMLINK; 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; 88bd238fb4SLatchesar Ionkov if ((mode & P9_DMLINK)) 89bd238fb4SLatchesar Ionkov res |= P9_DMLINK; 902bad8471SEric Van Hensbergen } 912bad8471SEric Van Hensbergen 922bad8471SEric Van Hensbergen return res; 932bad8471SEric Van Hensbergen } 942bad8471SEric Van Hensbergen 952bad8471SEric Van Hensbergen /** 962bad8471SEric Van Hensbergen * p9mode2unixmode- convert plan9 mode bits to unix mode bits 972bad8471SEric Van Hensbergen * @v9ses: v9fs session information 9845089142SAneesh Kumar K.V * @stat: p9_wstat from which mode need to be derived 9945089142SAneesh Kumar K.V * @rdev: major number, minor number in case of device files. 1002bad8471SEric Van Hensbergen * 1012bad8471SEric Van Hensbergen */ 10245089142SAneesh Kumar K.V static int p9mode2unixmode(struct v9fs_session_info *v9ses, 10345089142SAneesh Kumar K.V struct p9_wstat *stat, dev_t *rdev) 1042bad8471SEric Van Hensbergen { 1052bad8471SEric Van Hensbergen int res; 10645089142SAneesh Kumar K.V int mode = stat->mode; 1072bad8471SEric Van Hensbergen 10845089142SAneesh Kumar K.V res = mode & S_IALLUGO; 10945089142SAneesh Kumar K.V *rdev = 0; 1102bad8471SEric Van Hensbergen 111bd238fb4SLatchesar Ionkov if ((mode & P9_DMDIR) == P9_DMDIR) 1122bad8471SEric Van Hensbergen res |= S_IFDIR; 113dd6102fbSSripathi Kodi else if ((mode & P9_DMSYMLINK) && (v9fs_proto_dotu(v9ses))) 1142bad8471SEric Van Hensbergen res |= S_IFLNK; 115dd6102fbSSripathi Kodi else if ((mode & P9_DMSOCKET) && (v9fs_proto_dotu(v9ses)) 1162bad8471SEric Van Hensbergen && (v9ses->nodev == 0)) 1172bad8471SEric Van Hensbergen res |= S_IFSOCK; 118dd6102fbSSripathi Kodi else if ((mode & P9_DMNAMEDPIPE) && (v9fs_proto_dotu(v9ses)) 1192bad8471SEric Van Hensbergen && (v9ses->nodev == 0)) 1202bad8471SEric Van Hensbergen res |= S_IFIFO; 121dd6102fbSSripathi Kodi else if ((mode & P9_DMDEVICE) && (v9fs_proto_dotu(v9ses)) 12245089142SAneesh Kumar K.V && (v9ses->nodev == 0)) { 12345089142SAneesh Kumar K.V char type = 0, ext[32]; 12445089142SAneesh Kumar K.V int major = -1, minor = -1; 12545089142SAneesh Kumar K.V 12645089142SAneesh Kumar K.V strncpy(ext, stat->extension, sizeof(ext)); 12745089142SAneesh Kumar K.V sscanf(ext, "%c %u %u", &type, &major, &minor); 12845089142SAneesh Kumar K.V switch (type) { 12945089142SAneesh Kumar K.V case 'c': 13045089142SAneesh Kumar K.V res |= S_IFCHR; 13145089142SAneesh Kumar K.V break; 13245089142SAneesh Kumar K.V case 'b': 1332bad8471SEric Van Hensbergen res |= S_IFBLK; 13445089142SAneesh Kumar K.V break; 13545089142SAneesh Kumar K.V default: 13645089142SAneesh Kumar K.V P9_DPRINTK(P9_DEBUG_ERROR, 13745089142SAneesh Kumar K.V "Unknown special type %c %s\n", type, 13845089142SAneesh Kumar K.V stat->extension); 13945089142SAneesh Kumar K.V }; 14045089142SAneesh Kumar K.V *rdev = MKDEV(major, minor); 14145089142SAneesh Kumar K.V } else 1422bad8471SEric Van Hensbergen res |= S_IFREG; 1432bad8471SEric Van Hensbergen 144dd6102fbSSripathi Kodi if (v9fs_proto_dotu(v9ses)) { 145bd238fb4SLatchesar Ionkov if ((mode & P9_DMSETUID) == P9_DMSETUID) 1462bad8471SEric Van Hensbergen res |= S_ISUID; 1472bad8471SEric Van Hensbergen 148bd238fb4SLatchesar Ionkov if ((mode & P9_DMSETGID) == P9_DMSETGID) 1492bad8471SEric Van Hensbergen res |= S_ISGID; 150d199d652SAnthony Liguori 151d199d652SAnthony Liguori if ((mode & P9_DMSETVTX) == P9_DMSETVTX) 152d199d652SAnthony Liguori res |= S_ISVTX; 1532bad8471SEric Van Hensbergen } 1542bad8471SEric Van Hensbergen return res; 1552bad8471SEric Van Hensbergen } 1562bad8471SEric Van Hensbergen 157ee443996SEric Van Hensbergen /** 158ee443996SEric Van Hensbergen * v9fs_uflags2omode- convert posix open flags to plan 9 mode bits 159ee443996SEric Van Hensbergen * @uflags: flags to convert 1602e4bef41SEric Van Hensbergen * @extended: if .u extensions are active 161ee443996SEric Van Hensbergen */ 162ee443996SEric Van Hensbergen 1632e4bef41SEric Van Hensbergen int v9fs_uflags2omode(int uflags, int extended) 1646a3124a3SLatchesar Ionkov { 1656a3124a3SLatchesar Ionkov int ret; 1666a3124a3SLatchesar Ionkov 1676a3124a3SLatchesar Ionkov ret = 0; 1686a3124a3SLatchesar Ionkov switch (uflags&3) { 1696a3124a3SLatchesar Ionkov default: 1706a3124a3SLatchesar Ionkov case O_RDONLY: 171bd238fb4SLatchesar Ionkov ret = P9_OREAD; 1726a3124a3SLatchesar Ionkov break; 1736a3124a3SLatchesar Ionkov 1746a3124a3SLatchesar Ionkov case O_WRONLY: 175bd238fb4SLatchesar Ionkov ret = P9_OWRITE; 1766a3124a3SLatchesar Ionkov break; 1776a3124a3SLatchesar Ionkov 1786a3124a3SLatchesar Ionkov case O_RDWR: 179bd238fb4SLatchesar Ionkov ret = P9_ORDWR; 1806a3124a3SLatchesar Ionkov break; 1816a3124a3SLatchesar Ionkov } 1826a3124a3SLatchesar Ionkov 1836a3124a3SLatchesar Ionkov if (uflags & O_TRUNC) 184bd238fb4SLatchesar Ionkov ret |= P9_OTRUNC; 1856a3124a3SLatchesar Ionkov 1862e4bef41SEric Van Hensbergen if (extended) { 1872e4bef41SEric Van Hensbergen if (uflags & O_EXCL) 1882e4bef41SEric Van Hensbergen ret |= P9_OEXCL; 1892e4bef41SEric Van Hensbergen 1906a3124a3SLatchesar Ionkov if (uflags & O_APPEND) 191bd238fb4SLatchesar Ionkov ret |= P9_OAPPEND; 1922e4bef41SEric Van Hensbergen } 1936a3124a3SLatchesar Ionkov 1946a3124a3SLatchesar Ionkov return ret; 1956a3124a3SLatchesar Ionkov } 1966a3124a3SLatchesar Ionkov 1972bad8471SEric Van Hensbergen /** 198531b1094SLatchesar Ionkov * v9fs_blank_wstat - helper function to setup a 9P stat structure 199531b1094SLatchesar Ionkov * @wstat: structure to initialize 2002bad8471SEric Van Hensbergen * 2012bad8471SEric Van Hensbergen */ 2022bad8471SEric Van Hensbergen 2037a4439c4SM. Mohan Kumar void 204bd238fb4SLatchesar Ionkov v9fs_blank_wstat(struct p9_wstat *wstat) 2052bad8471SEric Van Hensbergen { 206531b1094SLatchesar Ionkov wstat->type = ~0; 207531b1094SLatchesar Ionkov wstat->dev = ~0; 208531b1094SLatchesar Ionkov wstat->qid.type = ~0; 209531b1094SLatchesar Ionkov wstat->qid.version = ~0; 210531b1094SLatchesar Ionkov *((long long *)&wstat->qid.path) = ~0; 211531b1094SLatchesar Ionkov wstat->mode = ~0; 212531b1094SLatchesar Ionkov wstat->atime = ~0; 213531b1094SLatchesar Ionkov wstat->mtime = ~0; 214531b1094SLatchesar Ionkov wstat->length = ~0; 215531b1094SLatchesar Ionkov wstat->name = NULL; 216531b1094SLatchesar Ionkov wstat->uid = NULL; 217531b1094SLatchesar Ionkov wstat->gid = NULL; 218531b1094SLatchesar Ionkov wstat->muid = NULL; 219531b1094SLatchesar Ionkov wstat->n_uid = ~0; 220531b1094SLatchesar Ionkov wstat->n_gid = ~0; 221531b1094SLatchesar Ionkov wstat->n_muid = ~0; 222531b1094SLatchesar Ionkov wstat->extension = NULL; 2232bad8471SEric Van Hensbergen } 2242bad8471SEric Van Hensbergen 22560e78d2cSAbhishek Kulkarni /** 22660e78d2cSAbhishek Kulkarni * v9fs_alloc_inode - helper function to allocate an inode 22760e78d2cSAbhishek Kulkarni * 22860e78d2cSAbhishek Kulkarni */ 22960e78d2cSAbhishek Kulkarni struct inode *v9fs_alloc_inode(struct super_block *sb) 23060e78d2cSAbhishek Kulkarni { 231a78ce05dSAneesh Kumar K.V struct v9fs_inode *v9inode; 232a78ce05dSAneesh Kumar K.V v9inode = (struct v9fs_inode *)kmem_cache_alloc(v9fs_inode_cache, 23360e78d2cSAbhishek Kulkarni GFP_KERNEL); 234a78ce05dSAneesh Kumar K.V if (!v9inode) 23560e78d2cSAbhishek Kulkarni return NULL; 236a78ce05dSAneesh Kumar K.V #ifdef CONFIG_9P_FSCACHE 237a78ce05dSAneesh Kumar K.V v9inode->fscache = NULL; 238a78ce05dSAneesh Kumar K.V spin_lock_init(&v9inode->fscache_lock); 239a78ce05dSAneesh Kumar K.V #endif 2406b39f6d2SAneesh Kumar K.V v9inode->writeback_fid = NULL; 241b3cbea03SAneesh Kumar K.V v9inode->cache_validity = 0; 2425a7e0a8cSAneesh Kumar K.V mutex_init(&v9inode->v_mutex); 243a78ce05dSAneesh Kumar K.V return &v9inode->vfs_inode; 24460e78d2cSAbhishek Kulkarni } 24560e78d2cSAbhishek Kulkarni 24660e78d2cSAbhishek Kulkarni /** 24760e78d2cSAbhishek Kulkarni * v9fs_destroy_inode - destroy an inode 24860e78d2cSAbhishek Kulkarni * 24960e78d2cSAbhishek Kulkarni */ 25060e78d2cSAbhishek Kulkarni 251fa0d7e3dSNick Piggin static void v9fs_i_callback(struct rcu_head *head) 252fa0d7e3dSNick Piggin { 253fa0d7e3dSNick Piggin struct inode *inode = container_of(head, struct inode, i_rcu); 254fa0d7e3dSNick Piggin INIT_LIST_HEAD(&inode->i_dentry); 255a78ce05dSAneesh Kumar K.V kmem_cache_free(v9fs_inode_cache, V9FS_I(inode)); 256fa0d7e3dSNick Piggin } 257fa0d7e3dSNick Piggin 25860e78d2cSAbhishek Kulkarni void v9fs_destroy_inode(struct inode *inode) 25960e78d2cSAbhishek Kulkarni { 260fa0d7e3dSNick Piggin call_rcu(&inode->i_rcu, v9fs_i_callback); 26160e78d2cSAbhishek Kulkarni } 26260e78d2cSAbhishek Kulkarni 2635ffc0cb3SAneesh Kumar K.V int v9fs_init_inode(struct v9fs_session_info *v9ses, 26445089142SAneesh Kumar K.V struct inode *inode, int mode, dev_t rdev) 2652bad8471SEric Van Hensbergen { 2665ffc0cb3SAneesh Kumar K.V int err = 0; 2672bb54115SAbhishek Kulkarni 268217f206dSDmitry Monakhov inode_init_owner(inode, NULL, mode); 2692bad8471SEric Van Hensbergen inode->i_blocks = 0; 27045089142SAneesh Kumar K.V inode->i_rdev = rdev; 2712bad8471SEric Van Hensbergen inode->i_atime = inode->i_mtime = inode->i_ctime = CURRENT_TIME; 272147b31cfSEric Van Hensbergen inode->i_mapping->a_ops = &v9fs_addr_operations; 2732bad8471SEric Van Hensbergen 2742bad8471SEric Van Hensbergen switch (mode & S_IFMT) { 2752bad8471SEric Van Hensbergen case S_IFIFO: 2762bad8471SEric Van Hensbergen case S_IFBLK: 2772bad8471SEric Van Hensbergen case S_IFCHR: 2782bad8471SEric Van Hensbergen case S_IFSOCK: 2794b43516aSM. Mohan Kumar if (v9fs_proto_dotl(v9ses)) { 2804b43516aSM. Mohan Kumar inode->i_op = &v9fs_file_inode_operations_dotl; 2814b43516aSM. Mohan Kumar } else if (v9fs_proto_dotu(v9ses)) { 2824b43516aSM. Mohan Kumar inode->i_op = &v9fs_file_inode_operations; 2834b43516aSM. Mohan Kumar } else { 284bd238fb4SLatchesar Ionkov P9_DPRINTK(P9_DEBUG_ERROR, 285bd238fb4SLatchesar Ionkov "special files without extended mode\n"); 2862bb54115SAbhishek Kulkarni err = -EINVAL; 2872bb54115SAbhishek Kulkarni goto error; 288b501611aSEric Van Hensbergen } 2892bb54115SAbhishek Kulkarni init_special_inode(inode, inode->i_mode, inode->i_rdev); 2905d58bec5SEric Van Hensbergen break; 2912bad8471SEric Van Hensbergen case S_IFREG: 2929b6533c9SSripathi Kodi if (v9fs_proto_dotl(v9ses)) { 2939b6533c9SSripathi Kodi inode->i_op = &v9fs_file_inode_operations_dotl; 29429236f4eSAneesh Kumar K.V if (v9ses->cache) 29529236f4eSAneesh Kumar K.V inode->i_fop = 29629236f4eSAneesh Kumar K.V &v9fs_cached_file_operations_dotl; 29729236f4eSAneesh Kumar K.V else 2989b6533c9SSripathi Kodi inode->i_fop = &v9fs_file_operations_dotl; 2999b6533c9SSripathi Kodi } else { 3002bad8471SEric Van Hensbergen inode->i_op = &v9fs_file_inode_operations; 30129236f4eSAneesh Kumar K.V if (v9ses->cache) 30229236f4eSAneesh Kumar K.V inode->i_fop = &v9fs_cached_file_operations; 30329236f4eSAneesh Kumar K.V else 3042bad8471SEric Van Hensbergen inode->i_fop = &v9fs_file_operations; 3059b6533c9SSripathi Kodi } 3069b6533c9SSripathi Kodi 3072bad8471SEric Van Hensbergen break; 308b501611aSEric Van Hensbergen case S_IFLNK: 3099b6533c9SSripathi Kodi if (!v9fs_proto_dotu(v9ses) && !v9fs_proto_dotl(v9ses)) { 3109b6533c9SSripathi Kodi P9_DPRINTK(P9_DEBUG_ERROR, "extended modes used with " 3119b6533c9SSripathi Kodi "legacy protocol.\n"); 3122bb54115SAbhishek Kulkarni err = -EINVAL; 3132bb54115SAbhishek Kulkarni goto error; 314b501611aSEric Van Hensbergen } 3159b6533c9SSripathi Kodi 3169b6533c9SSripathi Kodi if (v9fs_proto_dotl(v9ses)) 3179b6533c9SSripathi Kodi inode->i_op = &v9fs_symlink_inode_operations_dotl; 3189b6533c9SSripathi Kodi else 319b501611aSEric Van Hensbergen inode->i_op = &v9fs_symlink_inode_operations; 3209b6533c9SSripathi Kodi 321b501611aSEric Van Hensbergen break; 3222bad8471SEric Van Hensbergen case S_IFDIR: 323d8c76e6fSDave Hansen inc_nlink(inode); 3249b6533c9SSripathi Kodi if (v9fs_proto_dotl(v9ses)) 3259b6533c9SSripathi Kodi inode->i_op = &v9fs_dir_inode_operations_dotl; 3269b6533c9SSripathi Kodi else if (v9fs_proto_dotu(v9ses)) 3279b6533c9SSripathi Kodi inode->i_op = &v9fs_dir_inode_operations_dotu; 328b501611aSEric Van Hensbergen else 3292bad8471SEric Van Hensbergen inode->i_op = &v9fs_dir_inode_operations; 3309b6533c9SSripathi Kodi 3319b6533c9SSripathi Kodi if (v9fs_proto_dotl(v9ses)) 3329b6533c9SSripathi Kodi inode->i_fop = &v9fs_dir_operations_dotl; 3339b6533c9SSripathi Kodi else 3342bad8471SEric Van Hensbergen inode->i_fop = &v9fs_dir_operations; 3359b6533c9SSripathi Kodi 3362bad8471SEric Van Hensbergen break; 3372bad8471SEric Van Hensbergen default: 3382bb54115SAbhishek Kulkarni P9_DPRINTK(P9_DEBUG_ERROR, "BAD mode 0x%x S_IFMT 0x%x\n", 3392bad8471SEric Van Hensbergen mode, mode & S_IFMT); 3402bb54115SAbhishek Kulkarni err = -EINVAL; 3412bb54115SAbhishek Kulkarni goto error; 3422bad8471SEric Van Hensbergen } 3432bb54115SAbhishek Kulkarni error: 3445ffc0cb3SAneesh Kumar K.V return err; 3455ffc0cb3SAneesh Kumar K.V 3465ffc0cb3SAneesh Kumar K.V } 3475ffc0cb3SAneesh Kumar K.V 3485ffc0cb3SAneesh Kumar K.V /** 3495ffc0cb3SAneesh Kumar K.V * v9fs_get_inode - helper function to setup an inode 3505ffc0cb3SAneesh Kumar K.V * @sb: superblock 3515ffc0cb3SAneesh Kumar K.V * @mode: mode to setup inode with 3525ffc0cb3SAneesh Kumar K.V * 3535ffc0cb3SAneesh Kumar K.V */ 3545ffc0cb3SAneesh Kumar K.V 35545089142SAneesh Kumar K.V struct inode *v9fs_get_inode(struct super_block *sb, int mode, dev_t rdev) 3565ffc0cb3SAneesh Kumar K.V { 3575ffc0cb3SAneesh Kumar K.V int err; 3585ffc0cb3SAneesh Kumar K.V struct inode *inode; 3595ffc0cb3SAneesh Kumar K.V struct v9fs_session_info *v9ses = sb->s_fs_info; 3605ffc0cb3SAneesh Kumar K.V 3615ffc0cb3SAneesh Kumar K.V P9_DPRINTK(P9_DEBUG_VFS, "super block: %p mode: %o\n", sb, mode); 3625ffc0cb3SAneesh Kumar K.V 3635ffc0cb3SAneesh Kumar K.V inode = new_inode(sb); 3645ffc0cb3SAneesh Kumar K.V if (!inode) { 3655ffc0cb3SAneesh Kumar K.V P9_EPRINTK(KERN_WARNING, "Problem allocating inode\n"); 3665ffc0cb3SAneesh Kumar K.V return ERR_PTR(-ENOMEM); 3675ffc0cb3SAneesh Kumar K.V } 36845089142SAneesh Kumar K.V err = v9fs_init_inode(v9ses, inode, mode, rdev); 3695ffc0cb3SAneesh Kumar K.V if (err) { 3702bb54115SAbhishek Kulkarni iput(inode); 3712bb54115SAbhishek Kulkarni return ERR_PTR(err); 3722bad8471SEric Van Hensbergen } 3735ffc0cb3SAneesh Kumar K.V return inode; 3745ffc0cb3SAneesh Kumar K.V } 3752bad8471SEric Van Hensbergen 376bd238fb4SLatchesar Ionkov /* 3776a3124a3SLatchesar Ionkov static struct v9fs_fid* 3786a3124a3SLatchesar Ionkov v9fs_clone_walk(struct v9fs_session_info *v9ses, u32 fid, struct dentry *dentry) 3796a3124a3SLatchesar Ionkov { 3806a3124a3SLatchesar Ionkov int err; 381736c4b85SMika Kukkonen int nfid; 3826a3124a3SLatchesar Ionkov struct v9fs_fid *ret; 3836a3124a3SLatchesar Ionkov struct v9fs_fcall *fcall; 3840b8dd177SLatchesar Ionkov 3856a3124a3SLatchesar Ionkov nfid = v9fs_get_idpool(&v9ses->fidpool); 3866a3124a3SLatchesar Ionkov if (nfid < 0) { 3870b8dd177SLatchesar Ionkov eprintk(KERN_WARNING, "no free fids available\n"); 388731805b4SLatchesar Ionkov return ERR_PTR(-ENOSPC); 3890b8dd177SLatchesar Ionkov } 3900b8dd177SLatchesar Ionkov 3916a3124a3SLatchesar Ionkov err = v9fs_t_walk(v9ses, fid, nfid, (char *) dentry->d_name.name, 3926a3124a3SLatchesar Ionkov &fcall); 3936a3124a3SLatchesar Ionkov 3946a3124a3SLatchesar Ionkov if (err < 0) { 39541e5a6acSLatchesar Ionkov if (fcall && fcall->id == RWALK) 39641e5a6acSLatchesar Ionkov goto clunk_fid; 39741e5a6acSLatchesar Ionkov 3986a3124a3SLatchesar Ionkov PRINT_FCALL_ERROR("walk error", fcall); 3996a3124a3SLatchesar Ionkov v9fs_put_idpool(nfid, &v9ses->fidpool); 4006a3124a3SLatchesar Ionkov goto error; 4010b8dd177SLatchesar Ionkov } 4026a3124a3SLatchesar Ionkov 4033cf6429aSLatchesar Ionkov kfree(fcall); 4043cf6429aSLatchesar Ionkov fcall = NULL; 4056a3124a3SLatchesar Ionkov ret = v9fs_fid_create(v9ses, nfid); 4066a3124a3SLatchesar Ionkov if (!ret) { 4076a3124a3SLatchesar Ionkov err = -ENOMEM; 4086a3124a3SLatchesar Ionkov goto clunk_fid; 4090b8dd177SLatchesar Ionkov } 4102bad8471SEric Van Hensbergen 4116a3124a3SLatchesar Ionkov err = v9fs_fid_insert(ret, dentry); 4126a3124a3SLatchesar Ionkov if (err < 0) { 4136a3124a3SLatchesar Ionkov v9fs_fid_destroy(ret); 4146a3124a3SLatchesar Ionkov goto clunk_fid; 4156a3124a3SLatchesar Ionkov } 4162bad8471SEric Van Hensbergen 4176a3124a3SLatchesar Ionkov return ret; 4186a3124a3SLatchesar Ionkov 4196a3124a3SLatchesar Ionkov clunk_fid: 4206a3124a3SLatchesar Ionkov v9fs_t_clunk(v9ses, nfid); 4216a3124a3SLatchesar Ionkov 4226a3124a3SLatchesar Ionkov error: 4236a3124a3SLatchesar Ionkov kfree(fcall); 4246a3124a3SLatchesar Ionkov return ERR_PTR(err); 4256a3124a3SLatchesar Ionkov } 426bd238fb4SLatchesar Ionkov */ 4276a3124a3SLatchesar Ionkov 42860e78d2cSAbhishek Kulkarni 42960e78d2cSAbhishek Kulkarni /** 43060e78d2cSAbhishek Kulkarni * v9fs_clear_inode - release an inode 43160e78d2cSAbhishek Kulkarni * @inode: inode to release 43260e78d2cSAbhishek Kulkarni * 43360e78d2cSAbhishek Kulkarni */ 434b57922d9SAl Viro void v9fs_evict_inode(struct inode *inode) 43560e78d2cSAbhishek Kulkarni { 4366b39f6d2SAneesh Kumar K.V struct v9fs_inode *v9inode = V9FS_I(inode); 4376b39f6d2SAneesh Kumar K.V 438b57922d9SAl Viro truncate_inode_pages(inode->i_mapping, 0); 439b57922d9SAl Viro end_writeback(inode); 44060e78d2cSAbhishek Kulkarni filemap_fdatawrite(inode->i_mapping); 44160e78d2cSAbhishek Kulkarni 44260e78d2cSAbhishek Kulkarni #ifdef CONFIG_9P_FSCACHE 44360e78d2cSAbhishek Kulkarni v9fs_cache_inode_put_cookie(inode); 44460e78d2cSAbhishek Kulkarni #endif 4456b39f6d2SAneesh Kumar K.V /* clunk the fid stashed in writeback_fid */ 4466b39f6d2SAneesh Kumar K.V if (v9inode->writeback_fid) { 4476b39f6d2SAneesh Kumar K.V p9_client_clunk(v9inode->writeback_fid); 4486b39f6d2SAneesh Kumar K.V v9inode->writeback_fid = NULL; 4493cf387d7SAneesh Kumar K.V } 45060e78d2cSAbhishek Kulkarni } 45160e78d2cSAbhishek Kulkarni 452fd2421f5SAneesh Kumar K.V static int v9fs_test_inode(struct inode *inode, void *data) 453fd2421f5SAneesh Kumar K.V { 454fd2421f5SAneesh Kumar K.V int umode; 45545089142SAneesh Kumar K.V dev_t rdev; 456fd2421f5SAneesh Kumar K.V struct v9fs_inode *v9inode = V9FS_I(inode); 457fd2421f5SAneesh Kumar K.V struct p9_wstat *st = (struct p9_wstat *)data; 458fd2421f5SAneesh Kumar K.V struct v9fs_session_info *v9ses = v9fs_inode2v9ses(inode); 459fd2421f5SAneesh Kumar K.V 46045089142SAneesh Kumar K.V umode = p9mode2unixmode(v9ses, st, &rdev); 461fd2421f5SAneesh Kumar K.V /* don't match inode of different type */ 462fd2421f5SAneesh Kumar K.V if ((inode->i_mode & S_IFMT) != (umode & S_IFMT)) 463fd2421f5SAneesh Kumar K.V return 0; 464fd2421f5SAneesh Kumar K.V 465fd2421f5SAneesh Kumar K.V /* compare qid details */ 466fd2421f5SAneesh Kumar K.V if (memcmp(&v9inode->qid.version, 467fd2421f5SAneesh Kumar K.V &st->qid.version, sizeof(v9inode->qid.version))) 468fd2421f5SAneesh Kumar K.V return 0; 469fd2421f5SAneesh Kumar K.V 470fd2421f5SAneesh Kumar K.V if (v9inode->qid.type != st->qid.type) 471fd2421f5SAneesh Kumar K.V return 0; 472fd2421f5SAneesh Kumar K.V return 1; 473fd2421f5SAneesh Kumar K.V } 474fd2421f5SAneesh Kumar K.V 475ed80fcfaSAneesh Kumar K.V static int v9fs_test_new_inode(struct inode *inode, void *data) 476ed80fcfaSAneesh Kumar K.V { 477ed80fcfaSAneesh Kumar K.V return 0; 478ed80fcfaSAneesh Kumar K.V } 479ed80fcfaSAneesh Kumar K.V 480fd2421f5SAneesh Kumar K.V static int v9fs_set_inode(struct inode *inode, void *data) 481fd2421f5SAneesh Kumar K.V { 482fd2421f5SAneesh Kumar K.V struct v9fs_inode *v9inode = V9FS_I(inode); 483fd2421f5SAneesh Kumar K.V struct p9_wstat *st = (struct p9_wstat *)data; 484fd2421f5SAneesh Kumar K.V 485fd2421f5SAneesh Kumar K.V memcpy(&v9inode->qid, &st->qid, sizeof(st->qid)); 486fd2421f5SAneesh Kumar K.V return 0; 487fd2421f5SAneesh Kumar K.V } 488fd2421f5SAneesh Kumar K.V 4895ffc0cb3SAneesh Kumar K.V static struct inode *v9fs_qid_iget(struct super_block *sb, 4905ffc0cb3SAneesh Kumar K.V struct p9_qid *qid, 491ed80fcfaSAneesh Kumar K.V struct p9_wstat *st, 492ed80fcfaSAneesh Kumar K.V int new) 4935ffc0cb3SAneesh Kumar K.V { 49445089142SAneesh Kumar K.V dev_t rdev; 4955ffc0cb3SAneesh Kumar K.V int retval, umode; 4965ffc0cb3SAneesh Kumar K.V unsigned long i_ino; 4975ffc0cb3SAneesh Kumar K.V struct inode *inode; 4985ffc0cb3SAneesh Kumar K.V struct v9fs_session_info *v9ses = sb->s_fs_info; 499ed80fcfaSAneesh Kumar K.V int (*test)(struct inode *, void *); 500ed80fcfaSAneesh Kumar K.V 501ed80fcfaSAneesh Kumar K.V if (new) 502ed80fcfaSAneesh Kumar K.V test = v9fs_test_new_inode; 503ed80fcfaSAneesh Kumar K.V else 504ed80fcfaSAneesh Kumar K.V test = v9fs_test_inode; 5055ffc0cb3SAneesh Kumar K.V 5065ffc0cb3SAneesh Kumar K.V i_ino = v9fs_qid2ino(qid); 507ed80fcfaSAneesh Kumar K.V inode = iget5_locked(sb, i_ino, test, v9fs_set_inode, st); 5085ffc0cb3SAneesh Kumar K.V if (!inode) 5095ffc0cb3SAneesh Kumar K.V return ERR_PTR(-ENOMEM); 5105ffc0cb3SAneesh Kumar K.V if (!(inode->i_state & I_NEW)) 5115ffc0cb3SAneesh Kumar K.V return inode; 5125ffc0cb3SAneesh Kumar K.V /* 5135ffc0cb3SAneesh Kumar K.V * initialize the inode with the stat info 5145ffc0cb3SAneesh Kumar K.V * FIXME!! we may need support for stale inodes 5155ffc0cb3SAneesh Kumar K.V * later. 5165ffc0cb3SAneesh Kumar K.V */ 517fd2421f5SAneesh Kumar K.V inode->i_ino = i_ino; 51845089142SAneesh Kumar K.V umode = p9mode2unixmode(v9ses, st, &rdev); 51945089142SAneesh Kumar K.V retval = v9fs_init_inode(v9ses, inode, umode, rdev); 5205ffc0cb3SAneesh Kumar K.V if (retval) 5215ffc0cb3SAneesh Kumar K.V goto error; 5225ffc0cb3SAneesh Kumar K.V 5235ffc0cb3SAneesh Kumar K.V v9fs_stat2inode(st, inode, sb); 5245ffc0cb3SAneesh Kumar K.V #ifdef CONFIG_9P_FSCACHE 5255ffc0cb3SAneesh Kumar K.V v9fs_cache_inode_get_cookie(inode); 5265ffc0cb3SAneesh Kumar K.V #endif 5275ffc0cb3SAneesh Kumar K.V unlock_new_inode(inode); 5285ffc0cb3SAneesh Kumar K.V return inode; 5295ffc0cb3SAneesh Kumar K.V error: 5305ffc0cb3SAneesh Kumar K.V unlock_new_inode(inode); 5315ffc0cb3SAneesh Kumar K.V iput(inode); 5325ffc0cb3SAneesh Kumar K.V return ERR_PTR(retval); 5335ffc0cb3SAneesh Kumar K.V 5345ffc0cb3SAneesh Kumar K.V } 5355ffc0cb3SAneesh Kumar K.V 53653c06f4eSAneesh Kumar K.V struct inode * 537a78ce05dSAneesh Kumar K.V v9fs_inode_from_fid(struct v9fs_session_info *v9ses, struct p9_fid *fid, 538ed80fcfaSAneesh Kumar K.V struct super_block *sb, int new) 5396a3124a3SLatchesar Ionkov { 54051a87c55SEric Van Hensbergen struct p9_wstat *st; 5415ffc0cb3SAneesh Kumar K.V struct inode *inode = NULL; 5426a3124a3SLatchesar Ionkov 543bd238fb4SLatchesar Ionkov st = p9_client_stat(fid); 54402bc3567SAbhishek Kulkarni if (IS_ERR(st)) 54502bc3567SAbhishek Kulkarni return ERR_CAST(st); 5462bad8471SEric Van Hensbergen 547ed80fcfaSAneesh Kumar K.V inode = v9fs_qid_iget(sb, &st->qid, st, new); 54802bc3567SAbhishek Kulkarni p9stat_free(st); 549bd238fb4SLatchesar Ionkov kfree(st); 5505ffc0cb3SAneesh Kumar K.V return inode; 5512bad8471SEric Van Hensbergen } 5522bad8471SEric Van Hensbergen 5532bad8471SEric Van Hensbergen /** 554f88657ceSAneesh Kumar K.V * v9fs_at_to_dotl_flags- convert Linux specific AT flags to 555f88657ceSAneesh Kumar K.V * plan 9 AT flag. 556f88657ceSAneesh Kumar K.V * @flags: flags to convert 557f88657ceSAneesh Kumar K.V */ 558f88657ceSAneesh Kumar K.V static int v9fs_at_to_dotl_flags(int flags) 559f88657ceSAneesh Kumar K.V { 560f88657ceSAneesh Kumar K.V int rflags = 0; 561f88657ceSAneesh Kumar K.V if (flags & AT_REMOVEDIR) 562f88657ceSAneesh Kumar K.V rflags |= P9_DOTL_AT_REMOVEDIR; 563f88657ceSAneesh Kumar K.V return rflags; 564f88657ceSAneesh Kumar K.V } 565f88657ceSAneesh Kumar K.V 566f88657ceSAneesh Kumar K.V /** 5672bad8471SEric Van Hensbergen * v9fs_remove - helper function to remove files and directories 56873c592b9SEric Van Hensbergen * @dir: directory inode that is being deleted 56948e370ffSAneesh Kumar K.V * @dentry: dentry that is being deleted 57073c592b9SEric Van Hensbergen * @rmdir: removing a directory 5712bad8471SEric Van Hensbergen * 5722bad8471SEric Van Hensbergen */ 5732bad8471SEric Van Hensbergen 57448e370ffSAneesh Kumar K.V static int v9fs_remove(struct inode *dir, struct dentry *dentry, int flags) 5752bad8471SEric Van Hensbergen { 57648e370ffSAneesh Kumar K.V struct inode *inode; 57748e370ffSAneesh Kumar K.V int retval = -EOPNOTSUPP; 57848e370ffSAneesh Kumar K.V struct p9_fid *v9fid, *dfid; 57948e370ffSAneesh Kumar K.V struct v9fs_session_info *v9ses; 5802bad8471SEric Van Hensbergen 58148e370ffSAneesh Kumar K.V P9_DPRINTK(P9_DEBUG_VFS, "inode: %p dentry: %p rmdir: %x\n", 58248e370ffSAneesh Kumar K.V dir, dentry, flags); 5832bad8471SEric Van Hensbergen 58448e370ffSAneesh Kumar K.V v9ses = v9fs_inode2v9ses(dir); 58548e370ffSAneesh Kumar K.V inode = dentry->d_inode; 58648e370ffSAneesh Kumar K.V dfid = v9fs_fid_lookup(dentry->d_parent); 58748e370ffSAneesh Kumar K.V if (IS_ERR(dfid)) { 58848e370ffSAneesh Kumar K.V retval = PTR_ERR(dfid); 58948e370ffSAneesh Kumar K.V P9_DPRINTK(P9_DEBUG_VFS, "fid lookup failed %d\n", retval); 59048e370ffSAneesh Kumar K.V return retval; 59148e370ffSAneesh Kumar K.V } 59248e370ffSAneesh Kumar K.V if (v9fs_proto_dotl(v9ses)) 593f88657ceSAneesh Kumar K.V retval = p9_client_unlinkat(dfid, dentry->d_name.name, 594f88657ceSAneesh Kumar K.V v9fs_at_to_dotl_flags(flags)); 59548e370ffSAneesh Kumar K.V if (retval == -EOPNOTSUPP) { 59648e370ffSAneesh Kumar K.V /* Try the one based on path */ 59748e370ffSAneesh Kumar K.V v9fid = v9fs_fid_clone(dentry); 598da977b2cSEric Van Hensbergen if (IS_ERR(v9fid)) 599da977b2cSEric Van Hensbergen return PTR_ERR(v9fid); 600d994f405SAneesh Kumar K.V retval = p9_client_remove(v9fid); 60148e370ffSAneesh Kumar K.V } 602b271ec47SAneesh Kumar K.V if (!retval) { 603b271ec47SAneesh Kumar K.V /* 604b271ec47SAneesh Kumar K.V * directories on unlink should have zero 605b271ec47SAneesh Kumar K.V * link count 606b271ec47SAneesh Kumar K.V */ 60748e370ffSAneesh Kumar K.V if (flags & AT_REMOVEDIR) { 60848e370ffSAneesh Kumar K.V clear_nlink(inode); 609b271ec47SAneesh Kumar K.V drop_nlink(dir); 610b271ec47SAneesh Kumar K.V } else 61148e370ffSAneesh Kumar K.V drop_nlink(inode); 612d28c61f0SAneesh Kumar K.V 61348e370ffSAneesh Kumar K.V v9fs_invalidate_inode_attr(inode); 614d28c61f0SAneesh Kumar K.V v9fs_invalidate_inode_attr(dir); 615b271ec47SAneesh Kumar K.V } 616d994f405SAneesh Kumar K.V return retval; 6172bad8471SEric Van Hensbergen } 6182bad8471SEric Van Hensbergen 619bd238fb4SLatchesar Ionkov /** 620bd238fb4SLatchesar Ionkov * v9fs_create - Create a file 621ee443996SEric Van Hensbergen * @v9ses: session information 622ee443996SEric Van Hensbergen * @dir: directory that dentry is being created in 623bd238fb4SLatchesar Ionkov * @dentry: dentry that is being created 6240e15597eSAbhishek Kulkarni * @extension: 9p2000.u extension string to support devices, etc. 625bd238fb4SLatchesar Ionkov * @perm: create permissions 626bd238fb4SLatchesar Ionkov * @mode: open mode 627bd238fb4SLatchesar Ionkov * 628bd238fb4SLatchesar Ionkov */ 629bd238fb4SLatchesar Ionkov static struct p9_fid * 630bd238fb4SLatchesar Ionkov v9fs_create(struct v9fs_session_info *v9ses, struct inode *dir, 631bd238fb4SLatchesar Ionkov struct dentry *dentry, char *extension, u32 perm, u8 mode) 632bd238fb4SLatchesar Ionkov { 633bd238fb4SLatchesar Ionkov int err; 634bd238fb4SLatchesar Ionkov char *name; 635bd238fb4SLatchesar Ionkov struct p9_fid *dfid, *ofid, *fid; 636bd238fb4SLatchesar Ionkov struct inode *inode; 637bd238fb4SLatchesar Ionkov 63851a87c55SEric Van Hensbergen P9_DPRINTK(P9_DEBUG_VFS, "name %s\n", dentry->d_name.name); 63951a87c55SEric Van Hensbergen 640bd238fb4SLatchesar Ionkov err = 0; 641bd238fb4SLatchesar Ionkov ofid = NULL; 642bd238fb4SLatchesar Ionkov fid = NULL; 643bd238fb4SLatchesar Ionkov name = (char *) dentry->d_name.name; 6446d27e64dSVenkateswararao Jujjuri dfid = v9fs_fid_lookup(dentry->d_parent); 645bd238fb4SLatchesar Ionkov if (IS_ERR(dfid)) { 646bd238fb4SLatchesar Ionkov err = PTR_ERR(dfid); 6476d27e64dSVenkateswararao Jujjuri P9_DPRINTK(P9_DEBUG_VFS, "fid lookup failed %d\n", err); 6486d27e64dSVenkateswararao Jujjuri return ERR_PTR(err); 649bd238fb4SLatchesar Ionkov } 650bd238fb4SLatchesar Ionkov 651bd238fb4SLatchesar Ionkov /* clone a fid to use for creation */ 652bd238fb4SLatchesar Ionkov ofid = p9_client_walk(dfid, 0, NULL, 1); 653bd238fb4SLatchesar Ionkov if (IS_ERR(ofid)) { 654bd238fb4SLatchesar Ionkov err = PTR_ERR(ofid); 65551a87c55SEric Van Hensbergen P9_DPRINTK(P9_DEBUG_VFS, "p9_client_walk failed %d\n", err); 6566d27e64dSVenkateswararao Jujjuri return ERR_PTR(err); 657bd238fb4SLatchesar Ionkov } 658bd238fb4SLatchesar Ionkov 659bd238fb4SLatchesar Ionkov err = p9_client_fcreate(ofid, name, perm, mode, extension); 66051a87c55SEric Van Hensbergen if (err < 0) { 66151a87c55SEric Van Hensbergen P9_DPRINTK(P9_DEBUG_VFS, "p9_client_fcreate failed %d\n", err); 662bd238fb4SLatchesar Ionkov goto error; 66351a87c55SEric Van Hensbergen } 664bd238fb4SLatchesar Ionkov 665bd238fb4SLatchesar Ionkov /* now walk from the parent so we can get unopened fid */ 6666d27e64dSVenkateswararao Jujjuri fid = p9_client_walk(dfid, 1, &name, 1); 667bd238fb4SLatchesar Ionkov if (IS_ERR(fid)) { 668bd238fb4SLatchesar Ionkov err = PTR_ERR(fid); 66951a87c55SEric Van Hensbergen P9_DPRINTK(P9_DEBUG_VFS, "p9_client_walk failed %d\n", err); 670bd238fb4SLatchesar Ionkov fid = NULL; 671bd238fb4SLatchesar Ionkov goto error; 6726d27e64dSVenkateswararao Jujjuri } 673bd238fb4SLatchesar Ionkov 674bd238fb4SLatchesar Ionkov /* instantiate inode and assign the unopened fid to the dentry */ 675ed80fcfaSAneesh Kumar K.V inode = v9fs_get_new_inode_from_fid(v9ses, fid, dir->i_sb); 676bd238fb4SLatchesar Ionkov if (IS_ERR(inode)) { 677bd238fb4SLatchesar Ionkov err = PTR_ERR(inode); 67851a87c55SEric Van Hensbergen P9_DPRINTK(P9_DEBUG_VFS, "inode creation failed %d\n", err); 679bd238fb4SLatchesar Ionkov goto error; 680bd238fb4SLatchesar Ionkov } 68150fb6d2bSAbhishek Kulkarni err = v9fs_fid_add(dentry, fid); 68250fb6d2bSAbhishek Kulkarni if (err < 0) 68350fb6d2bSAbhishek Kulkarni goto error; 6845441ae5eSAneesh Kumar K.V d_instantiate(dentry, inode); 685bd238fb4SLatchesar Ionkov return ofid; 686bd238fb4SLatchesar Ionkov error: 687bd238fb4SLatchesar Ionkov if (ofid) 688bd238fb4SLatchesar Ionkov p9_client_clunk(ofid); 689bd238fb4SLatchesar Ionkov 690bd238fb4SLatchesar Ionkov if (fid) 691bd238fb4SLatchesar Ionkov p9_client_clunk(fid); 692bd238fb4SLatchesar Ionkov 693bd238fb4SLatchesar Ionkov return ERR_PTR(err); 694bd238fb4SLatchesar Ionkov } 695bd238fb4SLatchesar Ionkov 6962bad8471SEric Van Hensbergen /** 6972bad8471SEric Van Hensbergen * v9fs_vfs_create - VFS hook to create files 698ee443996SEric Van Hensbergen * @dir: directory inode that is being created 6992bad8471SEric Van Hensbergen * @dentry: dentry that is being deleted 7006a3124a3SLatchesar Ionkov * @mode: create permissions 7012bad8471SEric Van Hensbergen * @nd: path information 7022bad8471SEric Van Hensbergen * 7032bad8471SEric Van Hensbergen */ 7042bad8471SEric Van Hensbergen 7052bad8471SEric Van Hensbergen static int 7066a3124a3SLatchesar Ionkov v9fs_vfs_create(struct inode *dir, struct dentry *dentry, int mode, 7072bad8471SEric Van Hensbergen struct nameidata *nd) 7082bad8471SEric Van Hensbergen { 7096a3124a3SLatchesar Ionkov int err; 710bd238fb4SLatchesar Ionkov u32 perm; 7116a3124a3SLatchesar Ionkov int flags; 7126b39f6d2SAneesh Kumar K.V struct file *filp; 7136b39f6d2SAneesh Kumar K.V struct v9fs_inode *v9inode; 7146a3124a3SLatchesar Ionkov struct v9fs_session_info *v9ses; 7153cf387d7SAneesh Kumar K.V struct p9_fid *fid, *inode_fid; 7166a3124a3SLatchesar Ionkov 717bd238fb4SLatchesar Ionkov err = 0; 718bd238fb4SLatchesar Ionkov fid = NULL; 7196a3124a3SLatchesar Ionkov v9ses = v9fs_inode2v9ses(dir); 720da977b2cSEric Van Hensbergen perm = unixmode2p9mode(v9ses, mode); 721dd7dd556SAl Viro if (nd) 7228a5e929dSAl Viro flags = nd->intent.open.flags; 7236a3124a3SLatchesar Ionkov else 7246a3124a3SLatchesar Ionkov flags = O_RDWR; 7256a3124a3SLatchesar Ionkov 726bd238fb4SLatchesar Ionkov fid = v9fs_create(v9ses, dir, dentry, NULL, perm, 727dd6102fbSSripathi Kodi v9fs_uflags2omode(flags, 728dd6102fbSSripathi Kodi v9fs_proto_dotu(v9ses))); 729bd238fb4SLatchesar Ionkov if (IS_ERR(fid)) { 730bd238fb4SLatchesar Ionkov err = PTR_ERR(fid); 731bd238fb4SLatchesar Ionkov fid = NULL; 7326a3124a3SLatchesar Ionkov goto error; 7336a3124a3SLatchesar Ionkov } 7346a3124a3SLatchesar Ionkov 735d28c61f0SAneesh Kumar K.V v9fs_invalidate_inode_attr(dir); 736bd238fb4SLatchesar Ionkov /* if we are opening a file, assign the open fid to the file */ 737dd7dd556SAl Viro if (nd) { 7386b39f6d2SAneesh Kumar K.V v9inode = V9FS_I(dentry->d_inode); 7395a7e0a8cSAneesh Kumar K.V mutex_lock(&v9inode->v_mutex); 7407add697aSAneesh Kumar K.V if (v9ses->cache && !v9inode->writeback_fid && 7417add697aSAneesh Kumar K.V ((flags & O_ACCMODE) != O_RDONLY)) { 7423cf387d7SAneesh Kumar K.V /* 7436b39f6d2SAneesh Kumar K.V * clone a fid and add it to writeback_fid 7443cf387d7SAneesh Kumar K.V * we do it during open time instead of 7453cf387d7SAneesh Kumar K.V * page dirty time via write_begin/page_mkwrite 7463cf387d7SAneesh Kumar K.V * because we want write after unlink usecase 7473cf387d7SAneesh Kumar K.V * to work. 7483cf387d7SAneesh Kumar K.V */ 7493cf387d7SAneesh Kumar K.V inode_fid = v9fs_writeback_fid(dentry); 7503cf387d7SAneesh Kumar K.V if (IS_ERR(inode_fid)) { 7513cf387d7SAneesh Kumar K.V err = PTR_ERR(inode_fid); 7525a7e0a8cSAneesh Kumar K.V mutex_unlock(&v9inode->v_mutex); 7533cf387d7SAneesh Kumar K.V goto error; 7543cf387d7SAneesh Kumar K.V } 7556b39f6d2SAneesh Kumar K.V v9inode->writeback_fid = (void *) inode_fid; 7563cf387d7SAneesh Kumar K.V } 7575a7e0a8cSAneesh Kumar K.V mutex_unlock(&v9inode->v_mutex); 758877cb3d4SAneesh Kumar K.V filp = lookup_instantiate_filp(nd, dentry, generic_file_open); 7596a3124a3SLatchesar Ionkov if (IS_ERR(filp)) { 760bd238fb4SLatchesar Ionkov err = PTR_ERR(filp); 761bd238fb4SLatchesar Ionkov goto error; 7626a3124a3SLatchesar Ionkov } 7636a3124a3SLatchesar Ionkov 764bd238fb4SLatchesar Ionkov filp->private_data = fid; 76546848de0SAneesh Kumar K.V #ifdef CONFIG_9P_FSCACHE 76646848de0SAneesh Kumar K.V if (v9ses->cache) 76746848de0SAneesh Kumar K.V v9fs_cache_inode_set_cookie(dentry->d_inode, filp); 76846848de0SAneesh Kumar K.V #endif 769bd238fb4SLatchesar Ionkov } else 770bd238fb4SLatchesar Ionkov p9_client_clunk(fid); 7716a3124a3SLatchesar Ionkov 7726a3124a3SLatchesar Ionkov return 0; 7736a3124a3SLatchesar Ionkov 7746a3124a3SLatchesar Ionkov error: 775bd238fb4SLatchesar Ionkov if (fid) 776bd238fb4SLatchesar Ionkov p9_client_clunk(fid); 7776a3124a3SLatchesar Ionkov 7786a3124a3SLatchesar Ionkov return err; 7792bad8471SEric Van Hensbergen } 7802bad8471SEric Van Hensbergen 7812bad8471SEric Van Hensbergen /** 7822bad8471SEric Van Hensbergen * v9fs_vfs_mkdir - VFS mkdir hook to create a directory 783ee443996SEric Van Hensbergen * @dir: inode that is being unlinked 7842bad8471SEric Van Hensbergen * @dentry: dentry that is being unlinked 7852bad8471SEric Van Hensbergen * @mode: mode for new directory 7862bad8471SEric Van Hensbergen * 7872bad8471SEric Van Hensbergen */ 7882bad8471SEric Van Hensbergen 7896a3124a3SLatchesar Ionkov static int v9fs_vfs_mkdir(struct inode *dir, struct dentry *dentry, int mode) 7902bad8471SEric Van Hensbergen { 7916a3124a3SLatchesar Ionkov int err; 792bd238fb4SLatchesar Ionkov u32 perm; 793bd238fb4SLatchesar Ionkov struct p9_fid *fid; 794d28c61f0SAneesh Kumar K.V struct v9fs_session_info *v9ses; 7956a3124a3SLatchesar Ionkov 796bd238fb4SLatchesar Ionkov P9_DPRINTK(P9_DEBUG_VFS, "name %s\n", dentry->d_name.name); 797bd238fb4SLatchesar Ionkov err = 0; 7986a3124a3SLatchesar Ionkov v9ses = v9fs_inode2v9ses(dir); 7996a3124a3SLatchesar Ionkov perm = unixmode2p9mode(v9ses, mode | S_IFDIR); 800bd238fb4SLatchesar Ionkov fid = v9fs_create(v9ses, dir, dentry, NULL, perm, P9_OREAD); 801bd238fb4SLatchesar Ionkov if (IS_ERR(fid)) { 802bd238fb4SLatchesar Ionkov err = PTR_ERR(fid); 803bd238fb4SLatchesar Ionkov fid = NULL; 804d28c61f0SAneesh Kumar K.V } else { 805b271ec47SAneesh Kumar K.V inc_nlink(dir); 806d28c61f0SAneesh Kumar K.V v9fs_invalidate_inode_attr(dir); 807d28c61f0SAneesh Kumar K.V } 8086a3124a3SLatchesar Ionkov 809bd238fb4SLatchesar Ionkov if (fid) 810bd238fb4SLatchesar Ionkov p9_client_clunk(fid); 8116a3124a3SLatchesar Ionkov 8126a3124a3SLatchesar Ionkov return err; 8132bad8471SEric Van Hensbergen } 8142bad8471SEric Van Hensbergen 8152bad8471SEric Van Hensbergen /** 8162bad8471SEric Van Hensbergen * v9fs_vfs_lookup - VFS lookup hook to "walk" to a new inode 8172bad8471SEric Van Hensbergen * @dir: inode that is being walked from 8182bad8471SEric Van Hensbergen * @dentry: dentry that is being walked to? 8192bad8471SEric Van Hensbergen * @nameidata: path data 8202bad8471SEric Van Hensbergen * 8212bad8471SEric Van Hensbergen */ 8222bad8471SEric Van Hensbergen 82353c06f4eSAneesh Kumar K.V struct dentry *v9fs_vfs_lookup(struct inode *dir, struct dentry *dentry, 8242bad8471SEric Van Hensbergen struct nameidata *nameidata) 8252bad8471SEric Van Hensbergen { 82673f50717SAneesh Kumar K.V struct dentry *res; 8272bad8471SEric Van Hensbergen struct super_block *sb; 8282bad8471SEric Van Hensbergen struct v9fs_session_info *v9ses; 829bd238fb4SLatchesar Ionkov struct p9_fid *dfid, *fid; 8302bad8471SEric Van Hensbergen struct inode *inode; 831bd238fb4SLatchesar Ionkov char *name; 8322bad8471SEric Van Hensbergen int result = 0; 8332bad8471SEric Van Hensbergen 834bd238fb4SLatchesar Ionkov P9_DPRINTK(P9_DEBUG_VFS, "dir: %p dentry: (%s) %p nameidata: %p\n", 835731805b4SLatchesar Ionkov dir, dentry->d_name.name, dentry, nameidata); 8362bad8471SEric Van Hensbergen 83711e9b49bSSripathi Kodi if (dentry->d_name.len > NAME_MAX) 83811e9b49bSSripathi Kodi return ERR_PTR(-ENAMETOOLONG); 83911e9b49bSSripathi Kodi 8402bad8471SEric Van Hensbergen sb = dir->i_sb; 8412bad8471SEric Van Hensbergen v9ses = v9fs_inode2v9ses(dir); 842a534c8d1SAneesh Kumar K.V /* We can walk d_parent because we hold the dir->i_mutex */ 843bd238fb4SLatchesar Ionkov dfid = v9fs_fid_lookup(dentry->d_parent); 844bd238fb4SLatchesar Ionkov if (IS_ERR(dfid)) 845e231c2eeSDavid Howells return ERR_CAST(dfid); 8462bad8471SEric Van Hensbergen 847bd238fb4SLatchesar Ionkov name = (char *) dentry->d_name.name; 848bd238fb4SLatchesar Ionkov fid = p9_client_walk(dfid, 1, &name, 1); 849bd238fb4SLatchesar Ionkov if (IS_ERR(fid)) { 850bd238fb4SLatchesar Ionkov result = PTR_ERR(fid); 8512bad8471SEric Van Hensbergen if (result == -ENOENT) { 85285e0df24SAneesh Kumar K.V inode = NULL; 85385e0df24SAneesh Kumar K.V goto inst_out; 8542bad8471SEric Van Hensbergen } 8552bad8471SEric Van Hensbergen 856bd238fb4SLatchesar Ionkov return ERR_PTR(result); 8572bad8471SEric Van Hensbergen } 85873f50717SAneesh Kumar K.V /* 85973f50717SAneesh Kumar K.V * Make sure we don't use a wrong inode due to parallel 86073f50717SAneesh Kumar K.V * unlink. For cached mode create calls request for new 86173f50717SAneesh Kumar K.V * inode. But with cache disabled, lookup should do this. 86273f50717SAneesh Kumar K.V */ 86373f50717SAneesh Kumar K.V if (v9ses->cache) 864a78ce05dSAneesh Kumar K.V inode = v9fs_get_inode_from_fid(v9ses, fid, dir->i_sb); 86573f50717SAneesh Kumar K.V else 86673f50717SAneesh Kumar K.V inode = v9fs_get_new_inode_from_fid(v9ses, fid, dir->i_sb); 867bd238fb4SLatchesar Ionkov if (IS_ERR(inode)) { 868bd238fb4SLatchesar Ionkov result = PTR_ERR(inode); 869bd238fb4SLatchesar Ionkov inode = NULL; 870bd238fb4SLatchesar Ionkov goto error; 8712bad8471SEric Van Hensbergen } 872bd238fb4SLatchesar Ionkov result = v9fs_fid_add(dentry, fid); 8736a3124a3SLatchesar Ionkov if (result < 0) 8749856af8bSAneesh Kumar K.V goto error_iput; 87585e0df24SAneesh Kumar K.V inst_out: 87673f50717SAneesh Kumar K.V /* 87773f50717SAneesh Kumar K.V * If we had a rename on the server and a parallel lookup 87873f50717SAneesh Kumar K.V * for the new name, then make sure we instantiate with 87973f50717SAneesh Kumar K.V * the new name. ie look up for a/b, while on server somebody 88073f50717SAneesh Kumar K.V * moved b under k and client parallely did a lookup for 88173f50717SAneesh Kumar K.V * k/b. 88273f50717SAneesh Kumar K.V */ 88373f50717SAneesh Kumar K.V res = d_materialise_unique(dentry, inode); 88473f50717SAneesh Kumar K.V if (!IS_ERR(res)) 88573f50717SAneesh Kumar K.V return res; 88673f50717SAneesh Kumar K.V result = PTR_ERR(res); 8879856af8bSAneesh Kumar K.V error_iput: 8889856af8bSAneesh Kumar K.V iput(inode); 889bd238fb4SLatchesar Ionkov error: 890bd238fb4SLatchesar Ionkov p9_client_clunk(fid); 891da977b2cSEric Van Hensbergen 8922bad8471SEric Van Hensbergen return ERR_PTR(result); 8932bad8471SEric Van Hensbergen } 8942bad8471SEric Van Hensbergen 8952bad8471SEric Van Hensbergen /** 8962bad8471SEric Van Hensbergen * v9fs_vfs_unlink - VFS unlink hook to delete an inode 8972bad8471SEric Van Hensbergen * @i: inode that is being unlinked 89873c592b9SEric Van Hensbergen * @d: dentry that is being unlinked 8992bad8471SEric Van Hensbergen * 9002bad8471SEric Van Hensbergen */ 9012bad8471SEric Van Hensbergen 90253c06f4eSAneesh Kumar K.V int v9fs_vfs_unlink(struct inode *i, struct dentry *d) 9032bad8471SEric Van Hensbergen { 9042bad8471SEric Van Hensbergen return v9fs_remove(i, d, 0); 9052bad8471SEric Van Hensbergen } 9062bad8471SEric Van Hensbergen 9072bad8471SEric Van Hensbergen /** 9082bad8471SEric Van Hensbergen * v9fs_vfs_rmdir - VFS unlink hook to delete a directory 9092bad8471SEric Van Hensbergen * @i: inode that is being unlinked 91073c592b9SEric Van Hensbergen * @d: dentry that is being unlinked 9112bad8471SEric Van Hensbergen * 9122bad8471SEric Van Hensbergen */ 9132bad8471SEric Van Hensbergen 91453c06f4eSAneesh Kumar K.V int v9fs_vfs_rmdir(struct inode *i, struct dentry *d) 9152bad8471SEric Van Hensbergen { 91648e370ffSAneesh Kumar K.V return v9fs_remove(i, d, AT_REMOVEDIR); 9172bad8471SEric Van Hensbergen } 9182bad8471SEric Van Hensbergen 9192bad8471SEric Van Hensbergen /** 9202bad8471SEric Van Hensbergen * v9fs_vfs_rename - VFS hook to rename an inode 9212bad8471SEric Van Hensbergen * @old_dir: old dir inode 9222bad8471SEric Van Hensbergen * @old_dentry: old dentry 9232bad8471SEric Van Hensbergen * @new_dir: new dir inode 9242bad8471SEric Van Hensbergen * @new_dentry: new dentry 9252bad8471SEric Van Hensbergen * 9262bad8471SEric Van Hensbergen */ 9272bad8471SEric Van Hensbergen 92853c06f4eSAneesh Kumar K.V int 9292bad8471SEric Van Hensbergen v9fs_vfs_rename(struct inode *old_dir, struct dentry *old_dentry, 9302bad8471SEric Van Hensbergen struct inode *new_dir, struct dentry *new_dentry) 9312bad8471SEric Van Hensbergen { 932d28c61f0SAneesh Kumar K.V int retval; 933bd238fb4SLatchesar Ionkov struct inode *old_inode; 934b271ec47SAneesh Kumar K.V struct inode *new_inode; 935bd238fb4SLatchesar Ionkov struct v9fs_session_info *v9ses; 936bd238fb4SLatchesar Ionkov struct p9_fid *oldfid; 937bd238fb4SLatchesar Ionkov struct p9_fid *olddirfid; 938bd238fb4SLatchesar Ionkov struct p9_fid *newdirfid; 939bd238fb4SLatchesar Ionkov struct p9_wstat wstat; 9402bad8471SEric Van Hensbergen 941bd238fb4SLatchesar Ionkov P9_DPRINTK(P9_DEBUG_VFS, "\n"); 942bd238fb4SLatchesar Ionkov retval = 0; 943bd238fb4SLatchesar Ionkov old_inode = old_dentry->d_inode; 944b271ec47SAneesh Kumar K.V new_inode = new_dentry->d_inode; 945bd238fb4SLatchesar Ionkov v9ses = v9fs_inode2v9ses(old_inode); 946bd238fb4SLatchesar Ionkov oldfid = v9fs_fid_lookup(old_dentry); 947da977b2cSEric Van Hensbergen if (IS_ERR(oldfid)) 948da977b2cSEric Van Hensbergen return PTR_ERR(oldfid); 949da977b2cSEric Van Hensbergen 950da977b2cSEric Van Hensbergen olddirfid = v9fs_fid_clone(old_dentry->d_parent); 951da977b2cSEric Van Hensbergen if (IS_ERR(olddirfid)) { 952da977b2cSEric Van Hensbergen retval = PTR_ERR(olddirfid); 953bd238fb4SLatchesar Ionkov goto done; 954da977b2cSEric Van Hensbergen } 955da977b2cSEric Van Hensbergen 956da977b2cSEric Van Hensbergen newdirfid = v9fs_fid_clone(new_dentry->d_parent); 957da977b2cSEric Van Hensbergen if (IS_ERR(newdirfid)) { 958da977b2cSEric Van Hensbergen retval = PTR_ERR(newdirfid); 959bd238fb4SLatchesar Ionkov goto clunk_olddir; 9602bad8471SEric Van Hensbergen } 9612bad8471SEric Van Hensbergen 962a534c8d1SAneesh Kumar K.V down_write(&v9ses->rename_sem); 9634681dbdaSSripathi Kodi if (v9fs_proto_dotl(v9ses)) { 9649e8fb38eSAneesh Kumar K.V retval = p9_client_renameat(olddirfid, old_dentry->d_name.name, 9659e8fb38eSAneesh Kumar K.V newdirfid, new_dentry->d_name.name); 9669e8fb38eSAneesh Kumar K.V if (retval == -EOPNOTSUPP) 9674681dbdaSSripathi Kodi retval = p9_client_rename(oldfid, newdirfid, 9689e8fb38eSAneesh Kumar K.V new_dentry->d_name.name); 9699e8fb38eSAneesh Kumar K.V if (retval != -EOPNOTSUPP) 9704681dbdaSSripathi Kodi goto clunk_newdir; 9714681dbdaSSripathi Kodi } 972a534c8d1SAneesh Kumar K.V if (old_dentry->d_parent != new_dentry->d_parent) { 973a534c8d1SAneesh Kumar K.V /* 974a534c8d1SAneesh Kumar K.V * 9P .u can only handle file rename in the same directory 975a534c8d1SAneesh Kumar K.V */ 9764681dbdaSSripathi Kodi 977bd238fb4SLatchesar Ionkov P9_DPRINTK(P9_DEBUG_ERROR, 978bd238fb4SLatchesar Ionkov "old dir and new dir are different\n"); 979621997cdSEric Van Hensbergen retval = -EXDEV; 980bd238fb4SLatchesar Ionkov goto clunk_newdir; 9812bad8471SEric Van Hensbergen } 982531b1094SLatchesar Ionkov v9fs_blank_wstat(&wstat); 983ba17674fSLatchesar Ionkov wstat.muid = v9ses->uname; 984531b1094SLatchesar Ionkov wstat.name = (char *) new_dentry->d_name.name; 985bd238fb4SLatchesar Ionkov retval = p9_client_wstat(oldfid, &wstat); 9862bad8471SEric Van Hensbergen 987bd238fb4SLatchesar Ionkov clunk_newdir: 988b271ec47SAneesh Kumar K.V if (!retval) { 989b271ec47SAneesh Kumar K.V if (new_inode) { 990b271ec47SAneesh Kumar K.V if (S_ISDIR(new_inode->i_mode)) 991b271ec47SAneesh Kumar K.V clear_nlink(new_inode); 992b271ec47SAneesh Kumar K.V else 993b271ec47SAneesh Kumar K.V drop_nlink(new_inode); 994b271ec47SAneesh Kumar K.V } 995b271ec47SAneesh Kumar K.V if (S_ISDIR(old_inode->i_mode)) { 996b271ec47SAneesh Kumar K.V if (!new_inode) 997b271ec47SAneesh Kumar K.V inc_nlink(new_dir); 998b271ec47SAneesh Kumar K.V drop_nlink(old_dir); 999b271ec47SAneesh Kumar K.V } 10003bc86de3SAneesh Kumar K.V v9fs_invalidate_inode_attr(old_inode); 1001d28c61f0SAneesh Kumar K.V v9fs_invalidate_inode_attr(old_dir); 1002d28c61f0SAneesh Kumar K.V v9fs_invalidate_inode_attr(new_dir); 10033bc86de3SAneesh Kumar K.V 1004a534c8d1SAneesh Kumar K.V /* successful rename */ 1005a534c8d1SAneesh Kumar K.V d_move(old_dentry, new_dentry); 1006b271ec47SAneesh Kumar K.V } 1007a534c8d1SAneesh Kumar K.V up_write(&v9ses->rename_sem); 100822150c4fSLatchesar Ionkov p9_client_clunk(newdirfid); 10092bad8471SEric Van Hensbergen 1010bd238fb4SLatchesar Ionkov clunk_olddir: 101122150c4fSLatchesar Ionkov p9_client_clunk(olddirfid); 10122bad8471SEric Van Hensbergen 1013bd238fb4SLatchesar Ionkov done: 10142bad8471SEric Van Hensbergen return retval; 10152bad8471SEric Van Hensbergen } 10162bad8471SEric Van Hensbergen 10172bad8471SEric Van Hensbergen /** 1018943ffb58SAdrian Bunk * v9fs_vfs_getattr - retrieve file metadata 1019ee443996SEric Van Hensbergen * @mnt: mount information 1020ee443996SEric Van Hensbergen * @dentry: file to get attributes on 1021ee443996SEric Van Hensbergen * @stat: metadata structure to populate 10222bad8471SEric Van Hensbergen * 10232bad8471SEric Van Hensbergen */ 10242bad8471SEric Van Hensbergen 10252bad8471SEric Van Hensbergen static int 10262bad8471SEric Van Hensbergen v9fs_vfs_getattr(struct vfsmount *mnt, struct dentry *dentry, 10272bad8471SEric Van Hensbergen struct kstat *stat) 10282bad8471SEric Van Hensbergen { 1029bd238fb4SLatchesar Ionkov int err; 1030bd238fb4SLatchesar Ionkov struct v9fs_session_info *v9ses; 1031bd238fb4SLatchesar Ionkov struct p9_fid *fid; 103251a87c55SEric Van Hensbergen struct p9_wstat *st; 10332bad8471SEric Van Hensbergen 1034bd238fb4SLatchesar Ionkov P9_DPRINTK(P9_DEBUG_VFS, "dentry: %p\n", dentry); 1035bd238fb4SLatchesar Ionkov err = -EPERM; 103642869c8aSAneesh Kumar K.V v9ses = v9fs_dentry2v9ses(dentry); 1037a1211908SAneesh Kumar K.V if (v9ses->cache == CACHE_LOOSE || v9ses->cache == CACHE_FSCACHE) { 1038a1211908SAneesh Kumar K.V generic_fillattr(dentry->d_inode, stat); 1039a1211908SAneesh Kumar K.V return 0; 1040a1211908SAneesh Kumar K.V } 1041bd238fb4SLatchesar Ionkov fid = v9fs_fid_lookup(dentry); 1042da977b2cSEric Van Hensbergen if (IS_ERR(fid)) 1043da977b2cSEric Van Hensbergen return PTR_ERR(fid); 10442bad8471SEric Van Hensbergen 1045bd238fb4SLatchesar Ionkov st = p9_client_stat(fid); 1046bd238fb4SLatchesar Ionkov if (IS_ERR(st)) 1047bd238fb4SLatchesar Ionkov return PTR_ERR(st); 10482bad8471SEric Van Hensbergen 1049bd238fb4SLatchesar Ionkov v9fs_stat2inode(st, dentry->d_inode, dentry->d_inode->i_sb); 10502bad8471SEric Van Hensbergen generic_fillattr(dentry->d_inode, stat); 10512bad8471SEric Van Hensbergen 105262b2be59SLatchesar Ionkov p9stat_free(st); 1053bd238fb4SLatchesar Ionkov kfree(st); 1054bd238fb4SLatchesar Ionkov return 0; 10552bad8471SEric Van Hensbergen } 10562bad8471SEric Van Hensbergen 10572bad8471SEric Van Hensbergen /** 10582bad8471SEric Van Hensbergen * v9fs_vfs_setattr - set file metadata 10592bad8471SEric Van Hensbergen * @dentry: file whose metadata to set 10602bad8471SEric Van Hensbergen * @iattr: metadata assignment structure 10612bad8471SEric Van Hensbergen * 10622bad8471SEric Van Hensbergen */ 10632bad8471SEric Van Hensbergen 10642bad8471SEric Van Hensbergen static int v9fs_vfs_setattr(struct dentry *dentry, struct iattr *iattr) 10652bad8471SEric Van Hensbergen { 1066bd238fb4SLatchesar Ionkov int retval; 1067bd238fb4SLatchesar Ionkov struct v9fs_session_info *v9ses; 1068bd238fb4SLatchesar Ionkov struct p9_fid *fid; 1069bd238fb4SLatchesar Ionkov struct p9_wstat wstat; 10702bad8471SEric Van Hensbergen 1071bd238fb4SLatchesar Ionkov P9_DPRINTK(P9_DEBUG_VFS, "\n"); 1072059c138bSAneesh Kumar K.V retval = inode_change_ok(dentry->d_inode, iattr); 1073059c138bSAneesh Kumar K.V if (retval) 1074059c138bSAneesh Kumar K.V return retval; 1075059c138bSAneesh Kumar K.V 1076bd238fb4SLatchesar Ionkov retval = -EPERM; 107742869c8aSAneesh Kumar K.V v9ses = v9fs_dentry2v9ses(dentry); 1078bd238fb4SLatchesar Ionkov fid = v9fs_fid_lookup(dentry); 1079da977b2cSEric Van Hensbergen if(IS_ERR(fid)) 1080da977b2cSEric Van Hensbergen return PTR_ERR(fid); 10812bad8471SEric Van Hensbergen 1082531b1094SLatchesar Ionkov v9fs_blank_wstat(&wstat); 10832bad8471SEric Van Hensbergen if (iattr->ia_valid & ATTR_MODE) 1084531b1094SLatchesar Ionkov wstat.mode = unixmode2p9mode(v9ses, iattr->ia_mode); 10852bad8471SEric Van Hensbergen 10862bad8471SEric Van Hensbergen if (iattr->ia_valid & ATTR_MTIME) 1087531b1094SLatchesar Ionkov wstat.mtime = iattr->ia_mtime.tv_sec; 10882bad8471SEric Van Hensbergen 10892bad8471SEric Van Hensbergen if (iattr->ia_valid & ATTR_ATIME) 1090531b1094SLatchesar Ionkov wstat.atime = iattr->ia_atime.tv_sec; 10912bad8471SEric Van Hensbergen 10922bad8471SEric Van Hensbergen if (iattr->ia_valid & ATTR_SIZE) 1093531b1094SLatchesar Ionkov wstat.length = iattr->ia_size; 10942bad8471SEric Van Hensbergen 1095dd6102fbSSripathi Kodi if (v9fs_proto_dotu(v9ses)) { 1096531b1094SLatchesar Ionkov if (iattr->ia_valid & ATTR_UID) 1097531b1094SLatchesar Ionkov wstat.n_uid = iattr->ia_uid; 10982bad8471SEric Van Hensbergen 1099531b1094SLatchesar Ionkov if (iattr->ia_valid & ATTR_GID) 1100531b1094SLatchesar Ionkov wstat.n_gid = iattr->ia_gid; 11012bad8471SEric Van Hensbergen } 1102059c138bSAneesh Kumar K.V 11033dc5436aSAneesh Kumar K.V /* Write all dirty data */ 11043dc5436aSAneesh Kumar K.V if (S_ISREG(dentry->d_inode->i_mode)) 11053dc5436aSAneesh Kumar K.V filemap_write_and_wait(dentry->d_inode->i_mapping); 11063dc5436aSAneesh Kumar K.V 1107f10fc50fSAneesh Kumar K.V retval = p9_client_wstat(fid, &wstat); 1108f10fc50fSAneesh Kumar K.V if (retval < 0) 1109f10fc50fSAneesh Kumar K.V return retval; 1110059c138bSAneesh Kumar K.V 1111059c138bSAneesh Kumar K.V if ((iattr->ia_valid & ATTR_SIZE) && 1112059c138bSAneesh Kumar K.V iattr->ia_size != i_size_read(dentry->d_inode)) 1113059c138bSAneesh Kumar K.V truncate_setsize(dentry->d_inode, iattr->ia_size); 1114059c138bSAneesh Kumar K.V 1115f10fc50fSAneesh Kumar K.V v9fs_invalidate_inode_attr(dentry->d_inode); 11161025774cSChristoph Hellwig 11171025774cSChristoph Hellwig setattr_copy(dentry->d_inode, iattr); 11181025774cSChristoph Hellwig mark_inode_dirty(dentry->d_inode); 11191025774cSChristoph Hellwig return 0; 11202bad8471SEric Van Hensbergen } 11212bad8471SEric Van Hensbergen 11222bad8471SEric Van Hensbergen /** 1123531b1094SLatchesar Ionkov * v9fs_stat2inode - populate an inode structure with mistat info 1124531b1094SLatchesar Ionkov * @stat: Plan 9 metadata (mistat) structure 11252bad8471SEric Van Hensbergen * @inode: inode to populate 11262bad8471SEric Van Hensbergen * @sb: superblock of filesystem 11272bad8471SEric Van Hensbergen * 11282bad8471SEric Van Hensbergen */ 11292bad8471SEric Van Hensbergen 11302bad8471SEric Van Hensbergen void 113151a87c55SEric Van Hensbergen v9fs_stat2inode(struct p9_wstat *stat, struct inode *inode, 11322bad8471SEric Van Hensbergen struct super_block *sb) 11332bad8471SEric Van Hensbergen { 113445089142SAneesh Kumar K.V mode_t mode; 1135531b1094SLatchesar Ionkov char ext[32]; 11365717144aSAneesh Kumar K.V char tag_name[14]; 11375717144aSAneesh Kumar K.V unsigned int i_nlink; 11382bad8471SEric Van Hensbergen struct v9fs_session_info *v9ses = sb->s_fs_info; 1139b3cbea03SAneesh Kumar K.V struct v9fs_inode *v9inode = V9FS_I(inode); 11402bad8471SEric Van Hensbergen 1141bfe86848SMiklos Szeredi set_nlink(inode, 1); 11422bad8471SEric Van Hensbergen 1143531b1094SLatchesar Ionkov inode->i_atime.tv_sec = stat->atime; 1144531b1094SLatchesar Ionkov inode->i_mtime.tv_sec = stat->mtime; 1145531b1094SLatchesar Ionkov inode->i_ctime.tv_sec = stat->mtime; 11462bad8471SEric Van Hensbergen 1147bd32b82dSLatchesar Ionkov inode->i_uid = v9ses->dfltuid; 1148bd32b82dSLatchesar Ionkov inode->i_gid = v9ses->dfltgid; 11492bad8471SEric Van Hensbergen 1150dd6102fbSSripathi Kodi if (v9fs_proto_dotu(v9ses)) { 1151531b1094SLatchesar Ionkov inode->i_uid = stat->n_uid; 1152531b1094SLatchesar Ionkov inode->i_gid = stat->n_gid; 1153531b1094SLatchesar Ionkov } 11545717144aSAneesh Kumar K.V if ((S_ISREG(inode->i_mode)) || (S_ISDIR(inode->i_mode))) { 11555717144aSAneesh Kumar K.V if (v9fs_proto_dotu(v9ses) && (stat->extension[0] != '\0')) { 11565717144aSAneesh Kumar K.V /* 11575717144aSAneesh Kumar K.V * Hadlink support got added later to 11585717144aSAneesh Kumar K.V * to the .u extension. So there can be 11595717144aSAneesh Kumar K.V * server out there that doesn't support 11605717144aSAneesh Kumar K.V * this even with .u extension. So check 11615717144aSAneesh Kumar K.V * for non NULL stat->extension 11625717144aSAneesh Kumar K.V */ 11635717144aSAneesh Kumar K.V strncpy(ext, stat->extension, sizeof(ext)); 11645717144aSAneesh Kumar K.V /* HARDLINKCOUNT %u */ 11655717144aSAneesh Kumar K.V sscanf(ext, "%13s %u", tag_name, &i_nlink); 11665717144aSAneesh Kumar K.V if (!strncmp(tag_name, "HARDLINKCOUNT", 13)) 1167bfe86848SMiklos Szeredi set_nlink(inode, i_nlink); 11685717144aSAneesh Kumar K.V } 11695717144aSAneesh Kumar K.V } 117045089142SAneesh Kumar K.V mode = stat->mode & S_IALLUGO; 117145089142SAneesh Kumar K.V mode |= inode->i_mode & ~S_IALLUGO; 117245089142SAneesh Kumar K.V inode->i_mode = mode; 11737549ae3eSAbhishek Kulkarni i_size_write(inode, stat->length); 11742bad8471SEric Van Hensbergen 1175bd238fb4SLatchesar Ionkov /* not real number of blocks, but 512 byte ones ... */ 11767549ae3eSAbhishek Kulkarni inode->i_blocks = (i_size_read(inode) + 512 - 1) >> 9; 1177b3cbea03SAneesh Kumar K.V v9inode->cache_validity &= ~V9FS_INO_INVALID_ATTR; 11782bad8471SEric Van Hensbergen } 11792bad8471SEric Van Hensbergen 11802bad8471SEric Van Hensbergen /** 11812bad8471SEric Van Hensbergen * v9fs_qid2ino - convert qid into inode number 11822bad8471SEric Van Hensbergen * @qid: qid to hash 11832bad8471SEric Van Hensbergen * 11842bad8471SEric Van Hensbergen * BUG: potential for inode number collisions? 11852bad8471SEric Van Hensbergen */ 11862bad8471SEric Van Hensbergen 1187bd238fb4SLatchesar Ionkov ino_t v9fs_qid2ino(struct p9_qid *qid) 11882bad8471SEric Van Hensbergen { 11892bad8471SEric Van Hensbergen u64 path = qid->path + 2; 11902bad8471SEric Van Hensbergen ino_t i = 0; 11912bad8471SEric Van Hensbergen 11922bad8471SEric Van Hensbergen if (sizeof(ino_t) == sizeof(path)) 11932bad8471SEric Van Hensbergen memcpy(&i, &path, sizeof(ino_t)); 11942bad8471SEric Van Hensbergen else 11952bad8471SEric Van Hensbergen i = (ino_t) (path ^ (path >> 32)); 11962bad8471SEric Van Hensbergen 11972bad8471SEric Van Hensbergen return i; 11982bad8471SEric Van Hensbergen } 11992bad8471SEric Van Hensbergen 12002bad8471SEric Van Hensbergen /** 12012bad8471SEric Van Hensbergen * v9fs_readlink - read a symlink's location (internal version) 12022bad8471SEric Van Hensbergen * @dentry: dentry for symlink 120373c592b9SEric Van Hensbergen * @buffer: buffer to load symlink location into 12042bad8471SEric Van Hensbergen * @buflen: length of buffer 12052bad8471SEric Van Hensbergen * 12062bad8471SEric Van Hensbergen */ 12072bad8471SEric Van Hensbergen 12082bad8471SEric Van Hensbergen static int v9fs_readlink(struct dentry *dentry, char *buffer, int buflen) 12092bad8471SEric Van Hensbergen { 1210bd238fb4SLatchesar Ionkov int retval; 12112bad8471SEric Van Hensbergen 1212bd238fb4SLatchesar Ionkov struct v9fs_session_info *v9ses; 1213bd238fb4SLatchesar Ionkov struct p9_fid *fid; 121451a87c55SEric Van Hensbergen struct p9_wstat *st; 12152bad8471SEric Van Hensbergen 1216bd238fb4SLatchesar Ionkov P9_DPRINTK(P9_DEBUG_VFS, " %s\n", dentry->d_name.name); 1217bd238fb4SLatchesar Ionkov retval = -EPERM; 121842869c8aSAneesh Kumar K.V v9ses = v9fs_dentry2v9ses(dentry); 1219bd238fb4SLatchesar Ionkov fid = v9fs_fid_lookup(dentry); 1220da977b2cSEric Van Hensbergen if (IS_ERR(fid)) 1221da977b2cSEric Van Hensbergen return PTR_ERR(fid); 12222bad8471SEric Van Hensbergen 1223329176ccSM. Mohan Kumar if (!v9fs_proto_dotu(v9ses)) 1224bd238fb4SLatchesar Ionkov return -EBADF; 12252bad8471SEric Van Hensbergen 1226bd238fb4SLatchesar Ionkov st = p9_client_stat(fid); 1227bd238fb4SLatchesar Ionkov if (IS_ERR(st)) 1228bd238fb4SLatchesar Ionkov return PTR_ERR(st); 12292bad8471SEric Van Hensbergen 1230bd238fb4SLatchesar Ionkov if (!(st->mode & P9_DMSYMLINK)) { 12312bad8471SEric Van Hensbergen retval = -EINVAL; 1232bd238fb4SLatchesar Ionkov goto done; 12332bad8471SEric Van Hensbergen } 12342bad8471SEric Van Hensbergen 12352bad8471SEric Van Hensbergen /* copy extension buffer into buffer */ 123651a87c55SEric Van Hensbergen strncpy(buffer, st->extension, buflen); 12372bad8471SEric Van Hensbergen 1238bd238fb4SLatchesar Ionkov P9_DPRINTK(P9_DEBUG_VFS, 123951a87c55SEric Van Hensbergen "%s -> %s (%s)\n", dentry->d_name.name, st->extension, buffer); 1240bd238fb4SLatchesar Ionkov 12412511cd0bSMartin Stava retval = strnlen(buffer, buflen); 1242bd238fb4SLatchesar Ionkov done: 124362b2be59SLatchesar Ionkov p9stat_free(st); 1244bd238fb4SLatchesar Ionkov kfree(st); 12452bad8471SEric Van Hensbergen return retval; 12462bad8471SEric Van Hensbergen } 12472bad8471SEric Van Hensbergen 12482bad8471SEric Van Hensbergen /** 12492bad8471SEric Van Hensbergen * v9fs_vfs_follow_link - follow a symlink path 12502bad8471SEric Van Hensbergen * @dentry: dentry for symlink 12512bad8471SEric Van Hensbergen * @nd: nameidata 12522bad8471SEric Van Hensbergen * 12532bad8471SEric Van Hensbergen */ 12542bad8471SEric Van Hensbergen 12552bad8471SEric Van Hensbergen static void *v9fs_vfs_follow_link(struct dentry *dentry, struct nameidata *nd) 12562bad8471SEric Van Hensbergen { 12572bad8471SEric Van Hensbergen int len = 0; 12582bad8471SEric Van Hensbergen char *link = __getname(); 12592bad8471SEric Van Hensbergen 1260bd238fb4SLatchesar Ionkov P9_DPRINTK(P9_DEBUG_VFS, "%s n", dentry->d_name.name); 12612bad8471SEric Van Hensbergen 12622bad8471SEric Van Hensbergen if (!link) 12632bad8471SEric Van Hensbergen link = ERR_PTR(-ENOMEM); 12642bad8471SEric Van Hensbergen else { 126516cce6d2SLatchesar Ionkov len = v9fs_readlink(dentry, link, PATH_MAX); 12662bad8471SEric Van Hensbergen 12672bad8471SEric Van Hensbergen if (len < 0) { 1268ce44eeb6SDavi Arnaut __putname(link); 12692bad8471SEric Van Hensbergen link = ERR_PTR(len); 12702bad8471SEric Van Hensbergen } else 12712511cd0bSMartin Stava link[min(len, PATH_MAX-1)] = 0; 12722bad8471SEric Van Hensbergen } 12732bad8471SEric Van Hensbergen nd_set_link(nd, link); 12742bad8471SEric Van Hensbergen 12752bad8471SEric Van Hensbergen return NULL; 12762bad8471SEric Van Hensbergen } 12772bad8471SEric Van Hensbergen 12782bad8471SEric Van Hensbergen /** 12792bad8471SEric Van Hensbergen * v9fs_vfs_put_link - release a symlink path 12802bad8471SEric Van Hensbergen * @dentry: dentry for symlink 12812bad8471SEric Van Hensbergen * @nd: nameidata 1282ee443996SEric Van Hensbergen * @p: unused 12832bad8471SEric Van Hensbergen * 12842bad8471SEric Van Hensbergen */ 12852bad8471SEric Van Hensbergen 128653c06f4eSAneesh Kumar K.V void 1287ee443996SEric Van Hensbergen v9fs_vfs_put_link(struct dentry *dentry, struct nameidata *nd, void *p) 12882bad8471SEric Van Hensbergen { 12892bad8471SEric Van Hensbergen char *s = nd_get_link(nd); 12902bad8471SEric Van Hensbergen 12916ff23207SDuane Griffin P9_DPRINTK(P9_DEBUG_VFS, " %s %s\n", dentry->d_name.name, 12926ff23207SDuane Griffin IS_ERR(s) ? "<error>" : s); 12932bad8471SEric Van Hensbergen if (!IS_ERR(s)) 1294ce44eeb6SDavi Arnaut __putname(s); 12952bad8471SEric Van Hensbergen } 12962bad8471SEric Van Hensbergen 1297ee443996SEric Van Hensbergen /** 1298ee443996SEric Van Hensbergen * v9fs_vfs_mkspecial - create a special file 1299ee443996SEric Van Hensbergen * @dir: inode to create special file in 1300ee443996SEric Van Hensbergen * @dentry: dentry to create 1301ee443996SEric Van Hensbergen * @mode: mode to create special file 1302ee443996SEric Van Hensbergen * @extension: 9p2000.u format extension string representing special file 1303ee443996SEric Van Hensbergen * 1304ee443996SEric Van Hensbergen */ 1305ee443996SEric Van Hensbergen 1306531b1094SLatchesar Ionkov static int v9fs_vfs_mkspecial(struct inode *dir, struct dentry *dentry, 1307531b1094SLatchesar Ionkov int mode, const char *extension) 1308531b1094SLatchesar Ionkov { 1309bd238fb4SLatchesar Ionkov u32 perm; 1310bd238fb4SLatchesar Ionkov struct p9_fid *fid; 1311d28c61f0SAneesh Kumar K.V struct v9fs_session_info *v9ses; 1312531b1094SLatchesar Ionkov 13136a3124a3SLatchesar Ionkov v9ses = v9fs_inode2v9ses(dir); 1314dd6102fbSSripathi Kodi if (!v9fs_proto_dotu(v9ses)) { 1315bd238fb4SLatchesar Ionkov P9_DPRINTK(P9_DEBUG_ERROR, "not extended\n"); 13166a3124a3SLatchesar Ionkov return -EPERM; 1317531b1094SLatchesar Ionkov } 1318531b1094SLatchesar Ionkov 1319da977b2cSEric Van Hensbergen perm = unixmode2p9mode(v9ses, mode); 1320bd238fb4SLatchesar Ionkov fid = v9fs_create(v9ses, dir, dentry, (char *) extension, perm, 1321bd238fb4SLatchesar Ionkov P9_OREAD); 1322bd238fb4SLatchesar Ionkov if (IS_ERR(fid)) 1323bd238fb4SLatchesar Ionkov return PTR_ERR(fid); 1324da977b2cSEric Van Hensbergen 1325d28c61f0SAneesh Kumar K.V v9fs_invalidate_inode_attr(dir); 1326bd238fb4SLatchesar Ionkov p9_client_clunk(fid); 13276a3124a3SLatchesar Ionkov return 0; 1328531b1094SLatchesar Ionkov } 1329531b1094SLatchesar Ionkov 1330531b1094SLatchesar Ionkov /** 1331531b1094SLatchesar Ionkov * v9fs_vfs_symlink - helper function to create symlinks 1332531b1094SLatchesar Ionkov * @dir: directory inode containing symlink 1333531b1094SLatchesar Ionkov * @dentry: dentry for symlink 1334531b1094SLatchesar Ionkov * @symname: symlink data 1335531b1094SLatchesar Ionkov * 1336ee443996SEric Van Hensbergen * See Also: 9P2000.u RFC for more information 1337531b1094SLatchesar Ionkov * 1338531b1094SLatchesar Ionkov */ 1339531b1094SLatchesar Ionkov 1340531b1094SLatchesar Ionkov static int 1341531b1094SLatchesar Ionkov v9fs_vfs_symlink(struct inode *dir, struct dentry *dentry, const char *symname) 1342531b1094SLatchesar Ionkov { 1343bd238fb4SLatchesar Ionkov P9_DPRINTK(P9_DEBUG_VFS, " %lu,%s,%s\n", dir->i_ino, 1344bd238fb4SLatchesar Ionkov dentry->d_name.name, symname); 1345531b1094SLatchesar Ionkov 1346531b1094SLatchesar Ionkov return v9fs_vfs_mkspecial(dir, dentry, S_IFLNK, symname); 1347531b1094SLatchesar Ionkov } 1348531b1094SLatchesar Ionkov 13492bad8471SEric Van Hensbergen /** 13502bad8471SEric Van Hensbergen * v9fs_vfs_link - create a hardlink 13512bad8471SEric Van Hensbergen * @old_dentry: dentry for file to link to 13522bad8471SEric Van Hensbergen * @dir: inode destination for new link 135373c592b9SEric Van Hensbergen * @dentry: dentry for link 13542bad8471SEric Van Hensbergen * 13552bad8471SEric Van Hensbergen */ 13562bad8471SEric Van Hensbergen 13572bad8471SEric Van Hensbergen static int 13582bad8471SEric Van Hensbergen v9fs_vfs_link(struct dentry *old_dentry, struct inode *dir, 13592bad8471SEric Van Hensbergen struct dentry *dentry) 13602bad8471SEric Van Hensbergen { 1361531b1094SLatchesar Ionkov int retval; 1362531b1094SLatchesar Ionkov char *name; 1363d28c61f0SAneesh Kumar K.V struct p9_fid *oldfid; 13642bad8471SEric Van Hensbergen 1365bd238fb4SLatchesar Ionkov P9_DPRINTK(P9_DEBUG_VFS, 1366bd238fb4SLatchesar Ionkov " %lu,%s,%s\n", dir->i_ino, dentry->d_name.name, 13672bad8471SEric Van Hensbergen old_dentry->d_name.name); 13682bad8471SEric Van Hensbergen 1369da977b2cSEric Van Hensbergen oldfid = v9fs_fid_clone(old_dentry); 1370da977b2cSEric Van Hensbergen if (IS_ERR(oldfid)) 1371da977b2cSEric Van Hensbergen return PTR_ERR(oldfid); 13722bad8471SEric Van Hensbergen 1373531b1094SLatchesar Ionkov name = __getname(); 1374da977b2cSEric Van Hensbergen if (unlikely(!name)) { 1375da977b2cSEric Van Hensbergen retval = -ENOMEM; 1376da977b2cSEric Van Hensbergen goto clunk_fid; 1377da977b2cSEric Van Hensbergen } 13780710d36aSFlorin Malita 137916cce6d2SLatchesar Ionkov sprintf(name, "%d\n", oldfid->fid); 1380bd238fb4SLatchesar Ionkov retval = v9fs_vfs_mkspecial(dir, dentry, P9_DMLINK, name); 1381531b1094SLatchesar Ionkov __putname(name); 1382c06c066aSAneesh Kumar K.V if (!retval) { 1383c06c066aSAneesh Kumar K.V v9fs_refresh_inode(oldfid, old_dentry->d_inode); 1384d28c61f0SAneesh Kumar K.V v9fs_invalidate_inode_attr(dir); 1385c06c066aSAneesh Kumar K.V } 1386da977b2cSEric Van Hensbergen clunk_fid: 1387bd238fb4SLatchesar Ionkov p9_client_clunk(oldfid); 13882bad8471SEric Van Hensbergen return retval; 13892bad8471SEric Van Hensbergen } 13902bad8471SEric Van Hensbergen 13912bad8471SEric Van Hensbergen /** 13922bad8471SEric Van Hensbergen * v9fs_vfs_mknod - create a special file 13932bad8471SEric Van Hensbergen * @dir: inode destination for new link 13942bad8471SEric Van Hensbergen * @dentry: dentry for file 13952bad8471SEric Van Hensbergen * @mode: mode for creation 1396ee443996SEric Van Hensbergen * @rdev: device associated with special file 13972bad8471SEric Van Hensbergen * 13982bad8471SEric Van Hensbergen */ 13992bad8471SEric Van Hensbergen 14002bad8471SEric Van Hensbergen static int 14012bad8471SEric Van Hensbergen v9fs_vfs_mknod(struct inode *dir, struct dentry *dentry, int mode, dev_t rdev) 14022bad8471SEric Van Hensbergen { 1403531b1094SLatchesar Ionkov int retval; 1404531b1094SLatchesar Ionkov char *name; 14052bad8471SEric Van Hensbergen 1406bd238fb4SLatchesar Ionkov P9_DPRINTK(P9_DEBUG_VFS, 1407bd238fb4SLatchesar Ionkov " %lu,%s mode: %x MAJOR: %u MINOR: %u\n", dir->i_ino, 14082bad8471SEric Van Hensbergen dentry->d_name.name, mode, MAJOR(rdev), MINOR(rdev)); 14092bad8471SEric Van Hensbergen 1410531b1094SLatchesar Ionkov if (!new_valid_dev(rdev)) 1411531b1094SLatchesar Ionkov return -EINVAL; 141273c592b9SEric Van Hensbergen 1413531b1094SLatchesar Ionkov name = __getname(); 1414c0291a05SEugene Teo if (!name) 1415c0291a05SEugene Teo return -ENOMEM; 14162bad8471SEric Van Hensbergen /* build extension */ 14172bad8471SEric Van Hensbergen if (S_ISBLK(mode)) 1418531b1094SLatchesar Ionkov sprintf(name, "b %u %u", MAJOR(rdev), MINOR(rdev)); 14192bad8471SEric Van Hensbergen else if (S_ISCHR(mode)) 1420531b1094SLatchesar Ionkov sprintf(name, "c %u %u", MAJOR(rdev), MINOR(rdev)); 142173c592b9SEric Van Hensbergen else if (S_ISFIFO(mode)) 1422531b1094SLatchesar Ionkov *name = 0; 142375cc5c9bSVenkateswararao Jujjuri else if (S_ISSOCK(mode)) 142475cc5c9bSVenkateswararao Jujjuri *name = 0; 14252bad8471SEric Van Hensbergen else { 1426531b1094SLatchesar Ionkov __putname(name); 1427531b1094SLatchesar Ionkov return -EINVAL; 14282bad8471SEric Van Hensbergen } 14292bad8471SEric Van Hensbergen 1430531b1094SLatchesar Ionkov retval = v9fs_vfs_mkspecial(dir, dentry, mode, name); 1431531b1094SLatchesar Ionkov __putname(name); 14322bad8471SEric Van Hensbergen 14332bad8471SEric Van Hensbergen return retval; 14342bad8471SEric Van Hensbergen } 14352bad8471SEric Van Hensbergen 1436b3cbea03SAneesh Kumar K.V int v9fs_refresh_inode(struct p9_fid *fid, struct inode *inode) 1437b3cbea03SAneesh Kumar K.V { 143845089142SAneesh Kumar K.V int umode; 143945089142SAneesh Kumar K.V dev_t rdev; 1440b3cbea03SAneesh Kumar K.V loff_t i_size; 1441b3cbea03SAneesh Kumar K.V struct p9_wstat *st; 1442b3cbea03SAneesh Kumar K.V struct v9fs_session_info *v9ses; 1443b3cbea03SAneesh Kumar K.V 1444b3cbea03SAneesh Kumar K.V v9ses = v9fs_inode2v9ses(inode); 1445b3cbea03SAneesh Kumar K.V st = p9_client_stat(fid); 1446b3cbea03SAneesh Kumar K.V if (IS_ERR(st)) 1447b3cbea03SAneesh Kumar K.V return PTR_ERR(st); 144845089142SAneesh Kumar K.V /* 144945089142SAneesh Kumar K.V * Don't update inode if the file type is different 145045089142SAneesh Kumar K.V */ 145145089142SAneesh Kumar K.V umode = p9mode2unixmode(v9ses, st, &rdev); 145245089142SAneesh Kumar K.V if ((inode->i_mode & S_IFMT) != (umode & S_IFMT)) 145345089142SAneesh Kumar K.V goto out; 1454b3cbea03SAneesh Kumar K.V 1455b3cbea03SAneesh Kumar K.V spin_lock(&inode->i_lock); 1456b3cbea03SAneesh Kumar K.V /* 1457b3cbea03SAneesh Kumar K.V * We don't want to refresh inode->i_size, 1458b3cbea03SAneesh Kumar K.V * because we may have cached data 1459b3cbea03SAneesh Kumar K.V */ 1460b3cbea03SAneesh Kumar K.V i_size = inode->i_size; 1461b3cbea03SAneesh Kumar K.V v9fs_stat2inode(st, inode, inode->i_sb); 1462b3cbea03SAneesh Kumar K.V if (v9ses->cache) 1463b3cbea03SAneesh Kumar K.V inode->i_size = i_size; 1464b3cbea03SAneesh Kumar K.V spin_unlock(&inode->i_lock); 146545089142SAneesh Kumar K.V out: 1466b3cbea03SAneesh Kumar K.V p9stat_free(st); 1467b3cbea03SAneesh Kumar K.V kfree(st); 1468b3cbea03SAneesh Kumar K.V return 0; 1469b3cbea03SAneesh Kumar K.V } 1470b3cbea03SAneesh Kumar K.V 14719b6533c9SSripathi Kodi static const struct inode_operations v9fs_dir_inode_operations_dotu = { 14729b6533c9SSripathi Kodi .create = v9fs_vfs_create, 14739b6533c9SSripathi Kodi .lookup = v9fs_vfs_lookup, 14749b6533c9SSripathi Kodi .symlink = v9fs_vfs_symlink, 147550cc42ffSVenkateswararao Jujjuri (JV) .link = v9fs_vfs_link, 14769b6533c9SSripathi Kodi .unlink = v9fs_vfs_unlink, 14779b6533c9SSripathi Kodi .mkdir = v9fs_vfs_mkdir, 14789b6533c9SSripathi Kodi .rmdir = v9fs_vfs_rmdir, 14791d76e313SAneesh Kumar K.V .mknod = v9fs_vfs_mknod, 14809b6533c9SSripathi Kodi .rename = v9fs_vfs_rename, 14819b6533c9SSripathi Kodi .getattr = v9fs_vfs_getattr, 14829b6533c9SSripathi Kodi .setattr = v9fs_vfs_setattr, 14839b6533c9SSripathi Kodi }; 14849b6533c9SSripathi Kodi 1485754661f1SArjan van de Ven static const struct inode_operations v9fs_dir_inode_operations = { 1486b501611aSEric Van Hensbergen .create = v9fs_vfs_create, 1487b501611aSEric Van Hensbergen .lookup = v9fs_vfs_lookup, 1488b501611aSEric Van Hensbergen .unlink = v9fs_vfs_unlink, 1489b501611aSEric Van Hensbergen .mkdir = v9fs_vfs_mkdir, 1490b501611aSEric Van Hensbergen .rmdir = v9fs_vfs_rmdir, 1491b501611aSEric Van Hensbergen .mknod = v9fs_vfs_mknod, 1492b501611aSEric Van Hensbergen .rename = v9fs_vfs_rename, 1493b501611aSEric Van Hensbergen .getattr = v9fs_vfs_getattr, 1494b501611aSEric Van Hensbergen .setattr = v9fs_vfs_setattr, 1495b501611aSEric Van Hensbergen }; 1496b501611aSEric Van Hensbergen 1497754661f1SArjan van de Ven static const struct inode_operations v9fs_file_inode_operations = { 14982bad8471SEric Van Hensbergen .getattr = v9fs_vfs_getattr, 14992bad8471SEric Van Hensbergen .setattr = v9fs_vfs_setattr, 15002bad8471SEric Van Hensbergen }; 15012bad8471SEric Van Hensbergen 1502754661f1SArjan van de Ven static const struct inode_operations v9fs_symlink_inode_operations = { 1503204f2f0eSAl Viro .readlink = generic_readlink, 15042bad8471SEric Van Hensbergen .follow_link = v9fs_vfs_follow_link, 15052bad8471SEric Van Hensbergen .put_link = v9fs_vfs_put_link, 15062bad8471SEric Van Hensbergen .getattr = v9fs_vfs_getattr, 15072bad8471SEric Van Hensbergen .setattr = v9fs_vfs_setattr, 15082bad8471SEric Van Hensbergen }; 15099b6533c9SSripathi Kodi 1510