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 982bad8471SEric Van Hensbergen * @mode: mode to convert 992bad8471SEric Van Hensbergen * 1002bad8471SEric Van Hensbergen */ 1012bad8471SEric Van Hensbergen 10273c592b9SEric Van Hensbergen static int p9mode2unixmode(struct v9fs_session_info *v9ses, int mode) 1032bad8471SEric Van Hensbergen { 1042bad8471SEric Van Hensbergen int res; 1052bad8471SEric Van Hensbergen 1062bad8471SEric Van Hensbergen res = mode & 0777; 1072bad8471SEric Van Hensbergen 108bd238fb4SLatchesar Ionkov if ((mode & P9_DMDIR) == P9_DMDIR) 1092bad8471SEric Van Hensbergen res |= S_IFDIR; 110dd6102fbSSripathi Kodi else if ((mode & P9_DMSYMLINK) && (v9fs_proto_dotu(v9ses))) 1112bad8471SEric Van Hensbergen res |= S_IFLNK; 112dd6102fbSSripathi Kodi else if ((mode & P9_DMSOCKET) && (v9fs_proto_dotu(v9ses)) 1132bad8471SEric Van Hensbergen && (v9ses->nodev == 0)) 1142bad8471SEric Van Hensbergen res |= S_IFSOCK; 115dd6102fbSSripathi Kodi else if ((mode & P9_DMNAMEDPIPE) && (v9fs_proto_dotu(v9ses)) 1162bad8471SEric Van Hensbergen && (v9ses->nodev == 0)) 1172bad8471SEric Van Hensbergen res |= S_IFIFO; 118dd6102fbSSripathi Kodi else if ((mode & P9_DMDEVICE) && (v9fs_proto_dotu(v9ses)) 1192bad8471SEric Van Hensbergen && (v9ses->nodev == 0)) 1202bad8471SEric Van Hensbergen res |= S_IFBLK; 1212bad8471SEric Van Hensbergen else 1222bad8471SEric Van Hensbergen res |= S_IFREG; 1232bad8471SEric Van Hensbergen 124dd6102fbSSripathi Kodi if (v9fs_proto_dotu(v9ses)) { 125bd238fb4SLatchesar Ionkov if ((mode & P9_DMSETUID) == P9_DMSETUID) 1262bad8471SEric Van Hensbergen res |= S_ISUID; 1272bad8471SEric Van Hensbergen 128bd238fb4SLatchesar Ionkov if ((mode & P9_DMSETGID) == P9_DMSETGID) 1292bad8471SEric Van Hensbergen res |= S_ISGID; 130d199d652SAnthony Liguori 131d199d652SAnthony Liguori if ((mode & P9_DMSETVTX) == P9_DMSETVTX) 132d199d652SAnthony Liguori res |= S_ISVTX; 1332bad8471SEric Van Hensbergen } 1342bad8471SEric Van Hensbergen 1352bad8471SEric Van Hensbergen return res; 1362bad8471SEric Van Hensbergen } 1372bad8471SEric Van Hensbergen 138ee443996SEric Van Hensbergen /** 139ee443996SEric Van Hensbergen * v9fs_uflags2omode- convert posix open flags to plan 9 mode bits 140ee443996SEric Van Hensbergen * @uflags: flags to convert 1412e4bef41SEric Van Hensbergen * @extended: if .u extensions are active 142ee443996SEric Van Hensbergen */ 143ee443996SEric Van Hensbergen 1442e4bef41SEric Van Hensbergen int v9fs_uflags2omode(int uflags, int extended) 1456a3124a3SLatchesar Ionkov { 1466a3124a3SLatchesar Ionkov int ret; 1476a3124a3SLatchesar Ionkov 1486a3124a3SLatchesar Ionkov ret = 0; 1496a3124a3SLatchesar Ionkov switch (uflags&3) { 1506a3124a3SLatchesar Ionkov default: 1516a3124a3SLatchesar Ionkov case O_RDONLY: 152bd238fb4SLatchesar Ionkov ret = P9_OREAD; 1536a3124a3SLatchesar Ionkov break; 1546a3124a3SLatchesar Ionkov 1556a3124a3SLatchesar Ionkov case O_WRONLY: 156bd238fb4SLatchesar Ionkov ret = P9_OWRITE; 1576a3124a3SLatchesar Ionkov break; 1586a3124a3SLatchesar Ionkov 1596a3124a3SLatchesar Ionkov case O_RDWR: 160bd238fb4SLatchesar Ionkov ret = P9_ORDWR; 1616a3124a3SLatchesar Ionkov break; 1626a3124a3SLatchesar Ionkov } 1636a3124a3SLatchesar Ionkov 1646a3124a3SLatchesar Ionkov if (uflags & O_TRUNC) 165bd238fb4SLatchesar Ionkov ret |= P9_OTRUNC; 1666a3124a3SLatchesar Ionkov 1672e4bef41SEric Van Hensbergen if (extended) { 1682e4bef41SEric Van Hensbergen if (uflags & O_EXCL) 1692e4bef41SEric Van Hensbergen ret |= P9_OEXCL; 1702e4bef41SEric Van Hensbergen 1716a3124a3SLatchesar Ionkov if (uflags & O_APPEND) 172bd238fb4SLatchesar Ionkov ret |= P9_OAPPEND; 1732e4bef41SEric Van Hensbergen } 1746a3124a3SLatchesar Ionkov 1756a3124a3SLatchesar Ionkov return ret; 1766a3124a3SLatchesar Ionkov } 1776a3124a3SLatchesar Ionkov 1782bad8471SEric Van Hensbergen /** 179531b1094SLatchesar Ionkov * v9fs_blank_wstat - helper function to setup a 9P stat structure 180531b1094SLatchesar Ionkov * @wstat: structure to initialize 1812bad8471SEric Van Hensbergen * 1822bad8471SEric Van Hensbergen */ 1832bad8471SEric Van Hensbergen 1847a4439c4SM. Mohan Kumar void 185bd238fb4SLatchesar Ionkov v9fs_blank_wstat(struct p9_wstat *wstat) 1862bad8471SEric Van Hensbergen { 187531b1094SLatchesar Ionkov wstat->type = ~0; 188531b1094SLatchesar Ionkov wstat->dev = ~0; 189531b1094SLatchesar Ionkov wstat->qid.type = ~0; 190531b1094SLatchesar Ionkov wstat->qid.version = ~0; 191531b1094SLatchesar Ionkov *((long long *)&wstat->qid.path) = ~0; 192531b1094SLatchesar Ionkov wstat->mode = ~0; 193531b1094SLatchesar Ionkov wstat->atime = ~0; 194531b1094SLatchesar Ionkov wstat->mtime = ~0; 195531b1094SLatchesar Ionkov wstat->length = ~0; 196531b1094SLatchesar Ionkov wstat->name = NULL; 197531b1094SLatchesar Ionkov wstat->uid = NULL; 198531b1094SLatchesar Ionkov wstat->gid = NULL; 199531b1094SLatchesar Ionkov wstat->muid = NULL; 200531b1094SLatchesar Ionkov wstat->n_uid = ~0; 201531b1094SLatchesar Ionkov wstat->n_gid = ~0; 202531b1094SLatchesar Ionkov wstat->n_muid = ~0; 203531b1094SLatchesar Ionkov wstat->extension = NULL; 2042bad8471SEric Van Hensbergen } 2052bad8471SEric Van Hensbergen 20660e78d2cSAbhishek Kulkarni /** 20760e78d2cSAbhishek Kulkarni * v9fs_alloc_inode - helper function to allocate an inode 20860e78d2cSAbhishek Kulkarni * 20960e78d2cSAbhishek Kulkarni */ 21060e78d2cSAbhishek Kulkarni struct inode *v9fs_alloc_inode(struct super_block *sb) 21160e78d2cSAbhishek Kulkarni { 212a78ce05dSAneesh Kumar K.V struct v9fs_inode *v9inode; 213a78ce05dSAneesh Kumar K.V v9inode = (struct v9fs_inode *)kmem_cache_alloc(v9fs_inode_cache, 21460e78d2cSAbhishek Kulkarni GFP_KERNEL); 215a78ce05dSAneesh Kumar K.V if (!v9inode) 21660e78d2cSAbhishek Kulkarni return NULL; 217a78ce05dSAneesh Kumar K.V #ifdef CONFIG_9P_FSCACHE 218a78ce05dSAneesh Kumar K.V v9inode->fscache = NULL; 219a78ce05dSAneesh Kumar K.V spin_lock_init(&v9inode->fscache_lock); 220a78ce05dSAneesh Kumar K.V #endif 2216b39f6d2SAneesh Kumar K.V v9inode->writeback_fid = NULL; 222b3cbea03SAneesh Kumar K.V v9inode->cache_validity = 0; 2235a7e0a8cSAneesh Kumar K.V mutex_init(&v9inode->v_mutex); 224a78ce05dSAneesh Kumar K.V return &v9inode->vfs_inode; 22560e78d2cSAbhishek Kulkarni } 22660e78d2cSAbhishek Kulkarni 22760e78d2cSAbhishek Kulkarni /** 22860e78d2cSAbhishek Kulkarni * v9fs_destroy_inode - destroy an inode 22960e78d2cSAbhishek Kulkarni * 23060e78d2cSAbhishek Kulkarni */ 23160e78d2cSAbhishek Kulkarni 232fa0d7e3dSNick Piggin static void v9fs_i_callback(struct rcu_head *head) 233fa0d7e3dSNick Piggin { 234fa0d7e3dSNick Piggin struct inode *inode = container_of(head, struct inode, i_rcu); 235fa0d7e3dSNick Piggin INIT_LIST_HEAD(&inode->i_dentry); 236a78ce05dSAneesh Kumar K.V kmem_cache_free(v9fs_inode_cache, V9FS_I(inode)); 237fa0d7e3dSNick Piggin } 238fa0d7e3dSNick Piggin 23960e78d2cSAbhishek Kulkarni void v9fs_destroy_inode(struct inode *inode) 24060e78d2cSAbhishek Kulkarni { 241fa0d7e3dSNick Piggin call_rcu(&inode->i_rcu, v9fs_i_callback); 24260e78d2cSAbhishek Kulkarni } 24360e78d2cSAbhishek Kulkarni 2445ffc0cb3SAneesh Kumar K.V int v9fs_init_inode(struct v9fs_session_info *v9ses, 2455ffc0cb3SAneesh Kumar K.V struct inode *inode, int mode) 2462bad8471SEric Van Hensbergen { 2475ffc0cb3SAneesh Kumar K.V int err = 0; 2482bb54115SAbhishek Kulkarni 249217f206dSDmitry Monakhov inode_init_owner(inode, NULL, mode); 2502bad8471SEric Van Hensbergen inode->i_blocks = 0; 2512bad8471SEric Van Hensbergen inode->i_rdev = 0; 2522bad8471SEric Van Hensbergen inode->i_atime = inode->i_mtime = inode->i_ctime = CURRENT_TIME; 253147b31cfSEric Van Hensbergen inode->i_mapping->a_ops = &v9fs_addr_operations; 2542bad8471SEric Van Hensbergen 2552bad8471SEric Van Hensbergen switch (mode & S_IFMT) { 2562bad8471SEric Van Hensbergen case S_IFIFO: 2572bad8471SEric Van Hensbergen case S_IFBLK: 2582bad8471SEric Van Hensbergen case S_IFCHR: 2592bad8471SEric Van Hensbergen case S_IFSOCK: 2604b43516aSM. Mohan Kumar if (v9fs_proto_dotl(v9ses)) { 2614b43516aSM. Mohan Kumar inode->i_op = &v9fs_file_inode_operations_dotl; 2624b43516aSM. Mohan Kumar inode->i_fop = &v9fs_file_operations_dotl; 2634b43516aSM. Mohan Kumar } else if (v9fs_proto_dotu(v9ses)) { 2644b43516aSM. Mohan Kumar inode->i_op = &v9fs_file_inode_operations; 2654b43516aSM. Mohan Kumar inode->i_fop = &v9fs_file_operations; 2664b43516aSM. Mohan Kumar } else { 267bd238fb4SLatchesar Ionkov P9_DPRINTK(P9_DEBUG_ERROR, 268bd238fb4SLatchesar Ionkov "special files without extended mode\n"); 2692bb54115SAbhishek Kulkarni err = -EINVAL; 2702bb54115SAbhishek Kulkarni goto error; 271b501611aSEric Van Hensbergen } 2722bb54115SAbhishek Kulkarni init_special_inode(inode, inode->i_mode, inode->i_rdev); 2735d58bec5SEric Van Hensbergen break; 2742bad8471SEric Van Hensbergen case S_IFREG: 2759b6533c9SSripathi Kodi if (v9fs_proto_dotl(v9ses)) { 2769b6533c9SSripathi Kodi inode->i_op = &v9fs_file_inode_operations_dotl; 27729236f4eSAneesh Kumar K.V if (v9ses->cache) 27829236f4eSAneesh Kumar K.V inode->i_fop = 27929236f4eSAneesh Kumar K.V &v9fs_cached_file_operations_dotl; 28029236f4eSAneesh Kumar K.V else 2819b6533c9SSripathi Kodi inode->i_fop = &v9fs_file_operations_dotl; 2829b6533c9SSripathi Kodi } else { 2832bad8471SEric Van Hensbergen inode->i_op = &v9fs_file_inode_operations; 28429236f4eSAneesh Kumar K.V if (v9ses->cache) 28529236f4eSAneesh Kumar K.V inode->i_fop = &v9fs_cached_file_operations; 28629236f4eSAneesh Kumar K.V else 2872bad8471SEric Van Hensbergen inode->i_fop = &v9fs_file_operations; 2889b6533c9SSripathi Kodi } 2899b6533c9SSripathi Kodi 2902bad8471SEric Van Hensbergen break; 291b501611aSEric Van Hensbergen case S_IFLNK: 2929b6533c9SSripathi Kodi if (!v9fs_proto_dotu(v9ses) && !v9fs_proto_dotl(v9ses)) { 2939b6533c9SSripathi Kodi P9_DPRINTK(P9_DEBUG_ERROR, "extended modes used with " 2949b6533c9SSripathi Kodi "legacy protocol.\n"); 2952bb54115SAbhishek Kulkarni err = -EINVAL; 2962bb54115SAbhishek Kulkarni goto error; 297b501611aSEric Van Hensbergen } 2989b6533c9SSripathi Kodi 2999b6533c9SSripathi Kodi if (v9fs_proto_dotl(v9ses)) 3009b6533c9SSripathi Kodi inode->i_op = &v9fs_symlink_inode_operations_dotl; 3019b6533c9SSripathi Kodi else 302b501611aSEric Van Hensbergen inode->i_op = &v9fs_symlink_inode_operations; 3039b6533c9SSripathi Kodi 304b501611aSEric Van Hensbergen break; 3052bad8471SEric Van Hensbergen case S_IFDIR: 306d8c76e6fSDave Hansen inc_nlink(inode); 3079b6533c9SSripathi Kodi if (v9fs_proto_dotl(v9ses)) 3089b6533c9SSripathi Kodi inode->i_op = &v9fs_dir_inode_operations_dotl; 3099b6533c9SSripathi Kodi else if (v9fs_proto_dotu(v9ses)) 3109b6533c9SSripathi Kodi inode->i_op = &v9fs_dir_inode_operations_dotu; 311b501611aSEric Van Hensbergen else 3122bad8471SEric Van Hensbergen inode->i_op = &v9fs_dir_inode_operations; 3139b6533c9SSripathi Kodi 3149b6533c9SSripathi Kodi if (v9fs_proto_dotl(v9ses)) 3159b6533c9SSripathi Kodi inode->i_fop = &v9fs_dir_operations_dotl; 3169b6533c9SSripathi Kodi else 3172bad8471SEric Van Hensbergen inode->i_fop = &v9fs_dir_operations; 3189b6533c9SSripathi Kodi 3192bad8471SEric Van Hensbergen break; 3202bad8471SEric Van Hensbergen default: 3212bb54115SAbhishek Kulkarni P9_DPRINTK(P9_DEBUG_ERROR, "BAD mode 0x%x S_IFMT 0x%x\n", 3222bad8471SEric Van Hensbergen mode, mode & S_IFMT); 3232bb54115SAbhishek Kulkarni err = -EINVAL; 3242bb54115SAbhishek Kulkarni goto error; 3252bad8471SEric Van Hensbergen } 3262bb54115SAbhishek Kulkarni error: 3275ffc0cb3SAneesh Kumar K.V return err; 3285ffc0cb3SAneesh Kumar K.V 3295ffc0cb3SAneesh Kumar K.V } 3305ffc0cb3SAneesh Kumar K.V 3315ffc0cb3SAneesh Kumar K.V /** 3325ffc0cb3SAneesh Kumar K.V * v9fs_get_inode - helper function to setup an inode 3335ffc0cb3SAneesh Kumar K.V * @sb: superblock 3345ffc0cb3SAneesh Kumar K.V * @mode: mode to setup inode with 3355ffc0cb3SAneesh Kumar K.V * 3365ffc0cb3SAneesh Kumar K.V */ 3375ffc0cb3SAneesh Kumar K.V 3385ffc0cb3SAneesh Kumar K.V struct inode *v9fs_get_inode(struct super_block *sb, int mode) 3395ffc0cb3SAneesh Kumar K.V { 3405ffc0cb3SAneesh Kumar K.V int err; 3415ffc0cb3SAneesh Kumar K.V struct inode *inode; 3425ffc0cb3SAneesh Kumar K.V struct v9fs_session_info *v9ses = sb->s_fs_info; 3435ffc0cb3SAneesh Kumar K.V 3445ffc0cb3SAneesh Kumar K.V P9_DPRINTK(P9_DEBUG_VFS, "super block: %p mode: %o\n", sb, mode); 3455ffc0cb3SAneesh Kumar K.V 3465ffc0cb3SAneesh Kumar K.V inode = new_inode(sb); 3475ffc0cb3SAneesh Kumar K.V if (!inode) { 3485ffc0cb3SAneesh Kumar K.V P9_EPRINTK(KERN_WARNING, "Problem allocating inode\n"); 3495ffc0cb3SAneesh Kumar K.V return ERR_PTR(-ENOMEM); 3505ffc0cb3SAneesh Kumar K.V } 3515ffc0cb3SAneesh Kumar K.V err = v9fs_init_inode(v9ses, inode, mode); 3525ffc0cb3SAneesh Kumar K.V if (err) { 3532bb54115SAbhishek Kulkarni iput(inode); 3542bb54115SAbhishek Kulkarni return ERR_PTR(err); 3552bad8471SEric Van Hensbergen } 3565ffc0cb3SAneesh Kumar K.V return inode; 3575ffc0cb3SAneesh Kumar K.V } 3582bad8471SEric Van Hensbergen 359bd238fb4SLatchesar Ionkov /* 3606a3124a3SLatchesar Ionkov static struct v9fs_fid* 3616a3124a3SLatchesar Ionkov v9fs_clone_walk(struct v9fs_session_info *v9ses, u32 fid, struct dentry *dentry) 3626a3124a3SLatchesar Ionkov { 3636a3124a3SLatchesar Ionkov int err; 364736c4b85SMika Kukkonen int nfid; 3656a3124a3SLatchesar Ionkov struct v9fs_fid *ret; 3666a3124a3SLatchesar Ionkov struct v9fs_fcall *fcall; 3670b8dd177SLatchesar Ionkov 3686a3124a3SLatchesar Ionkov nfid = v9fs_get_idpool(&v9ses->fidpool); 3696a3124a3SLatchesar Ionkov if (nfid < 0) { 3700b8dd177SLatchesar Ionkov eprintk(KERN_WARNING, "no free fids available\n"); 371731805b4SLatchesar Ionkov return ERR_PTR(-ENOSPC); 3720b8dd177SLatchesar Ionkov } 3730b8dd177SLatchesar Ionkov 3746a3124a3SLatchesar Ionkov err = v9fs_t_walk(v9ses, fid, nfid, (char *) dentry->d_name.name, 3756a3124a3SLatchesar Ionkov &fcall); 3766a3124a3SLatchesar Ionkov 3776a3124a3SLatchesar Ionkov if (err < 0) { 37841e5a6acSLatchesar Ionkov if (fcall && fcall->id == RWALK) 37941e5a6acSLatchesar Ionkov goto clunk_fid; 38041e5a6acSLatchesar Ionkov 3816a3124a3SLatchesar Ionkov PRINT_FCALL_ERROR("walk error", fcall); 3826a3124a3SLatchesar Ionkov v9fs_put_idpool(nfid, &v9ses->fidpool); 3836a3124a3SLatchesar Ionkov goto error; 3840b8dd177SLatchesar Ionkov } 3856a3124a3SLatchesar Ionkov 3863cf6429aSLatchesar Ionkov kfree(fcall); 3873cf6429aSLatchesar Ionkov fcall = NULL; 3886a3124a3SLatchesar Ionkov ret = v9fs_fid_create(v9ses, nfid); 3896a3124a3SLatchesar Ionkov if (!ret) { 3906a3124a3SLatchesar Ionkov err = -ENOMEM; 3916a3124a3SLatchesar Ionkov goto clunk_fid; 3920b8dd177SLatchesar Ionkov } 3932bad8471SEric Van Hensbergen 3946a3124a3SLatchesar Ionkov err = v9fs_fid_insert(ret, dentry); 3956a3124a3SLatchesar Ionkov if (err < 0) { 3966a3124a3SLatchesar Ionkov v9fs_fid_destroy(ret); 3976a3124a3SLatchesar Ionkov goto clunk_fid; 3986a3124a3SLatchesar Ionkov } 3992bad8471SEric Van Hensbergen 4006a3124a3SLatchesar Ionkov return ret; 4016a3124a3SLatchesar Ionkov 4026a3124a3SLatchesar Ionkov clunk_fid: 4036a3124a3SLatchesar Ionkov v9fs_t_clunk(v9ses, nfid); 4046a3124a3SLatchesar Ionkov 4056a3124a3SLatchesar Ionkov error: 4066a3124a3SLatchesar Ionkov kfree(fcall); 4076a3124a3SLatchesar Ionkov return ERR_PTR(err); 4086a3124a3SLatchesar Ionkov } 409bd238fb4SLatchesar Ionkov */ 4106a3124a3SLatchesar Ionkov 41160e78d2cSAbhishek Kulkarni 41260e78d2cSAbhishek Kulkarni /** 41360e78d2cSAbhishek Kulkarni * v9fs_clear_inode - release an inode 41460e78d2cSAbhishek Kulkarni * @inode: inode to release 41560e78d2cSAbhishek Kulkarni * 41660e78d2cSAbhishek Kulkarni */ 417b57922d9SAl Viro void v9fs_evict_inode(struct inode *inode) 41860e78d2cSAbhishek Kulkarni { 4196b39f6d2SAneesh Kumar K.V struct v9fs_inode *v9inode = V9FS_I(inode); 4206b39f6d2SAneesh Kumar K.V 421b57922d9SAl Viro truncate_inode_pages(inode->i_mapping, 0); 422b57922d9SAl Viro end_writeback(inode); 42360e78d2cSAbhishek Kulkarni filemap_fdatawrite(inode->i_mapping); 42460e78d2cSAbhishek Kulkarni 42560e78d2cSAbhishek Kulkarni #ifdef CONFIG_9P_FSCACHE 42660e78d2cSAbhishek Kulkarni v9fs_cache_inode_put_cookie(inode); 42760e78d2cSAbhishek Kulkarni #endif 4286b39f6d2SAneesh Kumar K.V /* clunk the fid stashed in writeback_fid */ 4296b39f6d2SAneesh Kumar K.V if (v9inode->writeback_fid) { 4306b39f6d2SAneesh Kumar K.V p9_client_clunk(v9inode->writeback_fid); 4316b39f6d2SAneesh Kumar K.V v9inode->writeback_fid = NULL; 4323cf387d7SAneesh Kumar K.V } 43360e78d2cSAbhishek Kulkarni } 43460e78d2cSAbhishek Kulkarni 435fd2421f5SAneesh Kumar K.V static int v9fs_test_inode(struct inode *inode, void *data) 436fd2421f5SAneesh Kumar K.V { 437fd2421f5SAneesh Kumar K.V int umode; 438fd2421f5SAneesh Kumar K.V struct v9fs_inode *v9inode = V9FS_I(inode); 439fd2421f5SAneesh Kumar K.V struct p9_wstat *st = (struct p9_wstat *)data; 440fd2421f5SAneesh Kumar K.V struct v9fs_session_info *v9ses = v9fs_inode2v9ses(inode); 441fd2421f5SAneesh Kumar K.V 442fd2421f5SAneesh Kumar K.V umode = p9mode2unixmode(v9ses, st->mode); 443fd2421f5SAneesh Kumar K.V /* don't match inode of different type */ 444fd2421f5SAneesh Kumar K.V if ((inode->i_mode & S_IFMT) != (umode & S_IFMT)) 445fd2421f5SAneesh Kumar K.V return 0; 446fd2421f5SAneesh Kumar K.V 447fd2421f5SAneesh Kumar K.V /* compare qid details */ 448fd2421f5SAneesh Kumar K.V if (memcmp(&v9inode->qid.version, 449fd2421f5SAneesh Kumar K.V &st->qid.version, sizeof(v9inode->qid.version))) 450fd2421f5SAneesh Kumar K.V return 0; 451fd2421f5SAneesh Kumar K.V 452fd2421f5SAneesh Kumar K.V if (v9inode->qid.type != st->qid.type) 453fd2421f5SAneesh Kumar K.V return 0; 454fd2421f5SAneesh Kumar K.V return 1; 455fd2421f5SAneesh Kumar K.V } 456fd2421f5SAneesh Kumar K.V 457ed80fcfaSAneesh Kumar K.V static int v9fs_test_new_inode(struct inode *inode, void *data) 458ed80fcfaSAneesh Kumar K.V { 459ed80fcfaSAneesh Kumar K.V return 0; 460ed80fcfaSAneesh Kumar K.V } 461ed80fcfaSAneesh Kumar K.V 462fd2421f5SAneesh Kumar K.V static int v9fs_set_inode(struct inode *inode, void *data) 463fd2421f5SAneesh Kumar K.V { 464fd2421f5SAneesh Kumar K.V struct v9fs_inode *v9inode = V9FS_I(inode); 465fd2421f5SAneesh Kumar K.V struct p9_wstat *st = (struct p9_wstat *)data; 466fd2421f5SAneesh Kumar K.V 467fd2421f5SAneesh Kumar K.V memcpy(&v9inode->qid, &st->qid, sizeof(st->qid)); 468fd2421f5SAneesh Kumar K.V return 0; 469fd2421f5SAneesh Kumar K.V } 470fd2421f5SAneesh Kumar K.V 4715ffc0cb3SAneesh Kumar K.V static struct inode *v9fs_qid_iget(struct super_block *sb, 4725ffc0cb3SAneesh Kumar K.V struct p9_qid *qid, 473ed80fcfaSAneesh Kumar K.V struct p9_wstat *st, 474ed80fcfaSAneesh Kumar K.V int new) 4755ffc0cb3SAneesh Kumar K.V { 4765ffc0cb3SAneesh Kumar K.V int retval, umode; 4775ffc0cb3SAneesh Kumar K.V unsigned long i_ino; 4785ffc0cb3SAneesh Kumar K.V struct inode *inode; 4795ffc0cb3SAneesh Kumar K.V struct v9fs_session_info *v9ses = sb->s_fs_info; 480ed80fcfaSAneesh Kumar K.V int (*test)(struct inode *, void *); 481ed80fcfaSAneesh Kumar K.V 482ed80fcfaSAneesh Kumar K.V if (new) 483ed80fcfaSAneesh Kumar K.V test = v9fs_test_new_inode; 484ed80fcfaSAneesh Kumar K.V else 485ed80fcfaSAneesh Kumar K.V test = v9fs_test_inode; 4865ffc0cb3SAneesh Kumar K.V 4875ffc0cb3SAneesh Kumar K.V i_ino = v9fs_qid2ino(qid); 488ed80fcfaSAneesh Kumar K.V inode = iget5_locked(sb, i_ino, test, v9fs_set_inode, st); 4895ffc0cb3SAneesh Kumar K.V if (!inode) 4905ffc0cb3SAneesh Kumar K.V return ERR_PTR(-ENOMEM); 4915ffc0cb3SAneesh Kumar K.V if (!(inode->i_state & I_NEW)) 4925ffc0cb3SAneesh Kumar K.V return inode; 4935ffc0cb3SAneesh Kumar K.V /* 4945ffc0cb3SAneesh Kumar K.V * initialize the inode with the stat info 4955ffc0cb3SAneesh Kumar K.V * FIXME!! we may need support for stale inodes 4965ffc0cb3SAneesh Kumar K.V * later. 4975ffc0cb3SAneesh Kumar K.V */ 498fd2421f5SAneesh Kumar K.V inode->i_ino = i_ino; 4995ffc0cb3SAneesh Kumar K.V umode = p9mode2unixmode(v9ses, st->mode); 5005ffc0cb3SAneesh Kumar K.V retval = v9fs_init_inode(v9ses, inode, umode); 5015ffc0cb3SAneesh Kumar K.V if (retval) 5025ffc0cb3SAneesh Kumar K.V goto error; 5035ffc0cb3SAneesh Kumar K.V 5045ffc0cb3SAneesh Kumar K.V v9fs_stat2inode(st, inode, sb); 5055ffc0cb3SAneesh Kumar K.V #ifdef CONFIG_9P_FSCACHE 5065ffc0cb3SAneesh Kumar K.V v9fs_cache_inode_get_cookie(inode); 5075ffc0cb3SAneesh Kumar K.V #endif 5085ffc0cb3SAneesh Kumar K.V unlock_new_inode(inode); 5095ffc0cb3SAneesh Kumar K.V return inode; 5105ffc0cb3SAneesh Kumar K.V error: 5115ffc0cb3SAneesh Kumar K.V unlock_new_inode(inode); 5125ffc0cb3SAneesh Kumar K.V iput(inode); 5135ffc0cb3SAneesh Kumar K.V return ERR_PTR(retval); 5145ffc0cb3SAneesh Kumar K.V 5155ffc0cb3SAneesh Kumar K.V } 5165ffc0cb3SAneesh Kumar K.V 51753c06f4eSAneesh Kumar K.V struct inode * 518a78ce05dSAneesh Kumar K.V v9fs_inode_from_fid(struct v9fs_session_info *v9ses, struct p9_fid *fid, 519ed80fcfaSAneesh Kumar K.V struct super_block *sb, int new) 5206a3124a3SLatchesar Ionkov { 52151a87c55SEric Van Hensbergen struct p9_wstat *st; 5225ffc0cb3SAneesh Kumar K.V struct inode *inode = NULL; 5236a3124a3SLatchesar Ionkov 524bd238fb4SLatchesar Ionkov st = p9_client_stat(fid); 52502bc3567SAbhishek Kulkarni if (IS_ERR(st)) 52602bc3567SAbhishek Kulkarni return ERR_CAST(st); 5272bad8471SEric Van Hensbergen 528ed80fcfaSAneesh Kumar K.V inode = v9fs_qid_iget(sb, &st->qid, st, new); 52902bc3567SAbhishek Kulkarni p9stat_free(st); 530bd238fb4SLatchesar Ionkov kfree(st); 5315ffc0cb3SAneesh Kumar K.V return inode; 5322bad8471SEric Van Hensbergen } 5332bad8471SEric Van Hensbergen 5342bad8471SEric Van Hensbergen /** 5352bad8471SEric Van Hensbergen * v9fs_remove - helper function to remove files and directories 53673c592b9SEric Van Hensbergen * @dir: directory inode that is being deleted 53748e370ffSAneesh Kumar K.V * @dentry: dentry that is being deleted 53873c592b9SEric Van Hensbergen * @rmdir: removing a directory 5392bad8471SEric Van Hensbergen * 5402bad8471SEric Van Hensbergen */ 5412bad8471SEric Van Hensbergen 54248e370ffSAneesh Kumar K.V static int v9fs_remove(struct inode *dir, struct dentry *dentry, int flags) 5432bad8471SEric Van Hensbergen { 54448e370ffSAneesh Kumar K.V struct inode *inode; 54548e370ffSAneesh Kumar K.V int retval = -EOPNOTSUPP; 54648e370ffSAneesh Kumar K.V struct p9_fid *v9fid, *dfid; 54748e370ffSAneesh Kumar K.V struct v9fs_session_info *v9ses; 5482bad8471SEric Van Hensbergen 54948e370ffSAneesh Kumar K.V P9_DPRINTK(P9_DEBUG_VFS, "inode: %p dentry: %p rmdir: %x\n", 55048e370ffSAneesh Kumar K.V dir, dentry, flags); 5512bad8471SEric Van Hensbergen 55248e370ffSAneesh Kumar K.V v9ses = v9fs_inode2v9ses(dir); 55348e370ffSAneesh Kumar K.V inode = dentry->d_inode; 55448e370ffSAneesh Kumar K.V dfid = v9fs_fid_lookup(dentry->d_parent); 55548e370ffSAneesh Kumar K.V if (IS_ERR(dfid)) { 55648e370ffSAneesh Kumar K.V retval = PTR_ERR(dfid); 55748e370ffSAneesh Kumar K.V P9_DPRINTK(P9_DEBUG_VFS, "fid lookup failed %d\n", retval); 55848e370ffSAneesh Kumar K.V return retval; 55948e370ffSAneesh Kumar K.V } 56048e370ffSAneesh Kumar K.V if (v9fs_proto_dotl(v9ses)) 56148e370ffSAneesh Kumar K.V retval = p9_client_unlinkat(dfid, dentry->d_name.name, flags); 56248e370ffSAneesh Kumar K.V if (retval == -EOPNOTSUPP) { 56348e370ffSAneesh Kumar K.V /* Try the one based on path */ 56448e370ffSAneesh Kumar K.V v9fid = v9fs_fid_clone(dentry); 565da977b2cSEric Van Hensbergen if (IS_ERR(v9fid)) 566da977b2cSEric Van Hensbergen return PTR_ERR(v9fid); 567d994f405SAneesh Kumar K.V retval = p9_client_remove(v9fid); 56848e370ffSAneesh Kumar K.V } 569b271ec47SAneesh Kumar K.V if (!retval) { 570b271ec47SAneesh Kumar K.V /* 571b271ec47SAneesh Kumar K.V * directories on unlink should have zero 572b271ec47SAneesh Kumar K.V * link count 573b271ec47SAneesh Kumar K.V */ 57448e370ffSAneesh Kumar K.V if (flags & AT_REMOVEDIR) { 57548e370ffSAneesh Kumar K.V clear_nlink(inode); 576b271ec47SAneesh Kumar K.V drop_nlink(dir); 577b271ec47SAneesh Kumar K.V } else 57848e370ffSAneesh Kumar K.V drop_nlink(inode); 579d28c61f0SAneesh Kumar K.V 58048e370ffSAneesh Kumar K.V v9fs_invalidate_inode_attr(inode); 581d28c61f0SAneesh Kumar K.V v9fs_invalidate_inode_attr(dir); 582b271ec47SAneesh Kumar K.V } 583d994f405SAneesh Kumar K.V return retval; 5842bad8471SEric Van Hensbergen } 5852bad8471SEric Van Hensbergen 586bd238fb4SLatchesar Ionkov /** 587bd238fb4SLatchesar Ionkov * v9fs_create - Create a file 588ee443996SEric Van Hensbergen * @v9ses: session information 589ee443996SEric Van Hensbergen * @dir: directory that dentry is being created in 590bd238fb4SLatchesar Ionkov * @dentry: dentry that is being created 5910e15597eSAbhishek Kulkarni * @extension: 9p2000.u extension string to support devices, etc. 592bd238fb4SLatchesar Ionkov * @perm: create permissions 593bd238fb4SLatchesar Ionkov * @mode: open mode 594bd238fb4SLatchesar Ionkov * 595bd238fb4SLatchesar Ionkov */ 596bd238fb4SLatchesar Ionkov static struct p9_fid * 597bd238fb4SLatchesar Ionkov v9fs_create(struct v9fs_session_info *v9ses, struct inode *dir, 598bd238fb4SLatchesar Ionkov struct dentry *dentry, char *extension, u32 perm, u8 mode) 599bd238fb4SLatchesar Ionkov { 600bd238fb4SLatchesar Ionkov int err; 601bd238fb4SLatchesar Ionkov char *name; 602bd238fb4SLatchesar Ionkov struct p9_fid *dfid, *ofid, *fid; 603bd238fb4SLatchesar Ionkov struct inode *inode; 604bd238fb4SLatchesar Ionkov 60551a87c55SEric Van Hensbergen P9_DPRINTK(P9_DEBUG_VFS, "name %s\n", dentry->d_name.name); 60651a87c55SEric Van Hensbergen 607bd238fb4SLatchesar Ionkov err = 0; 608bd238fb4SLatchesar Ionkov ofid = NULL; 609bd238fb4SLatchesar Ionkov fid = NULL; 610bd238fb4SLatchesar Ionkov name = (char *) dentry->d_name.name; 6116d27e64dSVenkateswararao Jujjuri dfid = v9fs_fid_lookup(dentry->d_parent); 612bd238fb4SLatchesar Ionkov if (IS_ERR(dfid)) { 613bd238fb4SLatchesar Ionkov err = PTR_ERR(dfid); 6146d27e64dSVenkateswararao Jujjuri P9_DPRINTK(P9_DEBUG_VFS, "fid lookup failed %d\n", err); 6156d27e64dSVenkateswararao Jujjuri return ERR_PTR(err); 616bd238fb4SLatchesar Ionkov } 617bd238fb4SLatchesar Ionkov 618bd238fb4SLatchesar Ionkov /* clone a fid to use for creation */ 619bd238fb4SLatchesar Ionkov ofid = p9_client_walk(dfid, 0, NULL, 1); 620bd238fb4SLatchesar Ionkov if (IS_ERR(ofid)) { 621bd238fb4SLatchesar Ionkov err = PTR_ERR(ofid); 62251a87c55SEric Van Hensbergen P9_DPRINTK(P9_DEBUG_VFS, "p9_client_walk failed %d\n", err); 6236d27e64dSVenkateswararao Jujjuri return ERR_PTR(err); 624bd238fb4SLatchesar Ionkov } 625bd238fb4SLatchesar Ionkov 626bd238fb4SLatchesar Ionkov err = p9_client_fcreate(ofid, name, perm, mode, extension); 62751a87c55SEric Van Hensbergen if (err < 0) { 62851a87c55SEric Van Hensbergen P9_DPRINTK(P9_DEBUG_VFS, "p9_client_fcreate failed %d\n", err); 629bd238fb4SLatchesar Ionkov goto error; 63051a87c55SEric Van Hensbergen } 631bd238fb4SLatchesar Ionkov 632bd238fb4SLatchesar Ionkov /* now walk from the parent so we can get unopened fid */ 6336d27e64dSVenkateswararao Jujjuri fid = p9_client_walk(dfid, 1, &name, 1); 634bd238fb4SLatchesar Ionkov if (IS_ERR(fid)) { 635bd238fb4SLatchesar Ionkov err = PTR_ERR(fid); 63651a87c55SEric Van Hensbergen P9_DPRINTK(P9_DEBUG_VFS, "p9_client_walk failed %d\n", err); 637bd238fb4SLatchesar Ionkov fid = NULL; 638bd238fb4SLatchesar Ionkov goto error; 6396d27e64dSVenkateswararao Jujjuri } 640bd238fb4SLatchesar Ionkov 641bd238fb4SLatchesar Ionkov /* instantiate inode and assign the unopened fid to the dentry */ 642ed80fcfaSAneesh Kumar K.V inode = v9fs_get_new_inode_from_fid(v9ses, fid, dir->i_sb); 643bd238fb4SLatchesar Ionkov if (IS_ERR(inode)) { 644bd238fb4SLatchesar Ionkov err = PTR_ERR(inode); 64551a87c55SEric Van Hensbergen P9_DPRINTK(P9_DEBUG_VFS, "inode creation failed %d\n", err); 646bd238fb4SLatchesar Ionkov goto error; 647bd238fb4SLatchesar Ionkov } 64850fb6d2bSAbhishek Kulkarni err = v9fs_fid_add(dentry, fid); 64950fb6d2bSAbhishek Kulkarni if (err < 0) 65050fb6d2bSAbhishek Kulkarni goto error; 6515441ae5eSAneesh Kumar K.V d_instantiate(dentry, inode); 652bd238fb4SLatchesar Ionkov return ofid; 653bd238fb4SLatchesar Ionkov error: 654bd238fb4SLatchesar Ionkov if (ofid) 655bd238fb4SLatchesar Ionkov p9_client_clunk(ofid); 656bd238fb4SLatchesar Ionkov 657bd238fb4SLatchesar Ionkov if (fid) 658bd238fb4SLatchesar Ionkov p9_client_clunk(fid); 659bd238fb4SLatchesar Ionkov 660bd238fb4SLatchesar Ionkov return ERR_PTR(err); 661bd238fb4SLatchesar Ionkov } 662bd238fb4SLatchesar Ionkov 6632bad8471SEric Van Hensbergen /** 6642bad8471SEric Van Hensbergen * v9fs_vfs_create - VFS hook to create files 665ee443996SEric Van Hensbergen * @dir: directory inode that is being created 6662bad8471SEric Van Hensbergen * @dentry: dentry that is being deleted 6676a3124a3SLatchesar Ionkov * @mode: create permissions 6682bad8471SEric Van Hensbergen * @nd: path information 6692bad8471SEric Van Hensbergen * 6702bad8471SEric Van Hensbergen */ 6712bad8471SEric Van Hensbergen 6722bad8471SEric Van Hensbergen static int 6736a3124a3SLatchesar Ionkov v9fs_vfs_create(struct inode *dir, struct dentry *dentry, int mode, 6742bad8471SEric Van Hensbergen struct nameidata *nd) 6752bad8471SEric Van Hensbergen { 6766a3124a3SLatchesar Ionkov int err; 677bd238fb4SLatchesar Ionkov u32 perm; 6786a3124a3SLatchesar Ionkov int flags; 6796b39f6d2SAneesh Kumar K.V struct file *filp; 6806b39f6d2SAneesh Kumar K.V struct v9fs_inode *v9inode; 6816a3124a3SLatchesar Ionkov struct v9fs_session_info *v9ses; 6823cf387d7SAneesh Kumar K.V struct p9_fid *fid, *inode_fid; 6836a3124a3SLatchesar Ionkov 684bd238fb4SLatchesar Ionkov err = 0; 685bd238fb4SLatchesar Ionkov fid = NULL; 6866a3124a3SLatchesar Ionkov v9ses = v9fs_inode2v9ses(dir); 687da977b2cSEric Van Hensbergen perm = unixmode2p9mode(v9ses, mode); 688dd7dd556SAl Viro if (nd) 6898a5e929dSAl Viro flags = nd->intent.open.flags; 6906a3124a3SLatchesar Ionkov else 6916a3124a3SLatchesar Ionkov flags = O_RDWR; 6926a3124a3SLatchesar Ionkov 693bd238fb4SLatchesar Ionkov fid = v9fs_create(v9ses, dir, dentry, NULL, perm, 694dd6102fbSSripathi Kodi v9fs_uflags2omode(flags, 695dd6102fbSSripathi Kodi v9fs_proto_dotu(v9ses))); 696bd238fb4SLatchesar Ionkov if (IS_ERR(fid)) { 697bd238fb4SLatchesar Ionkov err = PTR_ERR(fid); 698bd238fb4SLatchesar Ionkov fid = NULL; 6996a3124a3SLatchesar Ionkov goto error; 7006a3124a3SLatchesar Ionkov } 7016a3124a3SLatchesar Ionkov 702d28c61f0SAneesh Kumar K.V v9fs_invalidate_inode_attr(dir); 703bd238fb4SLatchesar Ionkov /* if we are opening a file, assign the open fid to the file */ 704dd7dd556SAl Viro if (nd) { 7056b39f6d2SAneesh Kumar K.V v9inode = V9FS_I(dentry->d_inode); 7065a7e0a8cSAneesh Kumar K.V mutex_lock(&v9inode->v_mutex); 7077add697aSAneesh Kumar K.V if (v9ses->cache && !v9inode->writeback_fid && 7087add697aSAneesh Kumar K.V ((flags & O_ACCMODE) != O_RDONLY)) { 7093cf387d7SAneesh Kumar K.V /* 7106b39f6d2SAneesh Kumar K.V * clone a fid and add it to writeback_fid 7113cf387d7SAneesh Kumar K.V * we do it during open time instead of 7123cf387d7SAneesh Kumar K.V * page dirty time via write_begin/page_mkwrite 7133cf387d7SAneesh Kumar K.V * because we want write after unlink usecase 7143cf387d7SAneesh Kumar K.V * to work. 7153cf387d7SAneesh Kumar K.V */ 7163cf387d7SAneesh Kumar K.V inode_fid = v9fs_writeback_fid(dentry); 7173cf387d7SAneesh Kumar K.V if (IS_ERR(inode_fid)) { 7183cf387d7SAneesh Kumar K.V err = PTR_ERR(inode_fid); 7195a7e0a8cSAneesh Kumar K.V mutex_unlock(&v9inode->v_mutex); 7203cf387d7SAneesh Kumar K.V goto error; 7213cf387d7SAneesh Kumar K.V } 7226b39f6d2SAneesh Kumar K.V v9inode->writeback_fid = (void *) inode_fid; 7233cf387d7SAneesh Kumar K.V } 7245a7e0a8cSAneesh Kumar K.V mutex_unlock(&v9inode->v_mutex); 725877cb3d4SAneesh Kumar K.V filp = lookup_instantiate_filp(nd, dentry, generic_file_open); 7266a3124a3SLatchesar Ionkov if (IS_ERR(filp)) { 727bd238fb4SLatchesar Ionkov err = PTR_ERR(filp); 728bd238fb4SLatchesar Ionkov goto error; 7296a3124a3SLatchesar Ionkov } 7306a3124a3SLatchesar Ionkov 731bd238fb4SLatchesar Ionkov filp->private_data = fid; 73246848de0SAneesh Kumar K.V #ifdef CONFIG_9P_FSCACHE 73346848de0SAneesh Kumar K.V if (v9ses->cache) 73446848de0SAneesh Kumar K.V v9fs_cache_inode_set_cookie(dentry->d_inode, filp); 73546848de0SAneesh Kumar K.V #endif 736bd238fb4SLatchesar Ionkov } else 737bd238fb4SLatchesar Ionkov p9_client_clunk(fid); 7386a3124a3SLatchesar Ionkov 7396a3124a3SLatchesar Ionkov return 0; 7406a3124a3SLatchesar Ionkov 7416a3124a3SLatchesar Ionkov error: 742bd238fb4SLatchesar Ionkov if (fid) 743bd238fb4SLatchesar Ionkov p9_client_clunk(fid); 7446a3124a3SLatchesar Ionkov 7456a3124a3SLatchesar Ionkov return err; 7462bad8471SEric Van Hensbergen } 7472bad8471SEric Van Hensbergen 7482bad8471SEric Van Hensbergen /** 7492bad8471SEric Van Hensbergen * v9fs_vfs_mkdir - VFS mkdir hook to create a directory 750ee443996SEric Van Hensbergen * @dir: inode that is being unlinked 7512bad8471SEric Van Hensbergen * @dentry: dentry that is being unlinked 7522bad8471SEric Van Hensbergen * @mode: mode for new directory 7532bad8471SEric Van Hensbergen * 7542bad8471SEric Van Hensbergen */ 7552bad8471SEric Van Hensbergen 7566a3124a3SLatchesar Ionkov static int v9fs_vfs_mkdir(struct inode *dir, struct dentry *dentry, int mode) 7572bad8471SEric Van Hensbergen { 7586a3124a3SLatchesar Ionkov int err; 759bd238fb4SLatchesar Ionkov u32 perm; 760bd238fb4SLatchesar Ionkov struct p9_fid *fid; 761d28c61f0SAneesh Kumar K.V struct v9fs_session_info *v9ses; 7626a3124a3SLatchesar Ionkov 763bd238fb4SLatchesar Ionkov P9_DPRINTK(P9_DEBUG_VFS, "name %s\n", dentry->d_name.name); 764bd238fb4SLatchesar Ionkov err = 0; 7656a3124a3SLatchesar Ionkov v9ses = v9fs_inode2v9ses(dir); 7666a3124a3SLatchesar Ionkov perm = unixmode2p9mode(v9ses, mode | S_IFDIR); 767bd238fb4SLatchesar Ionkov fid = v9fs_create(v9ses, dir, dentry, NULL, perm, P9_OREAD); 768bd238fb4SLatchesar Ionkov if (IS_ERR(fid)) { 769bd238fb4SLatchesar Ionkov err = PTR_ERR(fid); 770bd238fb4SLatchesar Ionkov fid = NULL; 771d28c61f0SAneesh Kumar K.V } else { 772b271ec47SAneesh Kumar K.V inc_nlink(dir); 773d28c61f0SAneesh Kumar K.V v9fs_invalidate_inode_attr(dir); 774d28c61f0SAneesh Kumar K.V } 7756a3124a3SLatchesar Ionkov 776bd238fb4SLatchesar Ionkov if (fid) 777bd238fb4SLatchesar Ionkov p9_client_clunk(fid); 7786a3124a3SLatchesar Ionkov 7796a3124a3SLatchesar Ionkov return err; 7802bad8471SEric Van Hensbergen } 7812bad8471SEric Van Hensbergen 7822bad8471SEric Van Hensbergen /** 7832bad8471SEric Van Hensbergen * v9fs_vfs_lookup - VFS lookup hook to "walk" to a new inode 7842bad8471SEric Van Hensbergen * @dir: inode that is being walked from 7852bad8471SEric Van Hensbergen * @dentry: dentry that is being walked to? 7862bad8471SEric Van Hensbergen * @nameidata: path data 7872bad8471SEric Van Hensbergen * 7882bad8471SEric Van Hensbergen */ 7892bad8471SEric Van Hensbergen 79053c06f4eSAneesh Kumar K.V struct dentry *v9fs_vfs_lookup(struct inode *dir, struct dentry *dentry, 7912bad8471SEric Van Hensbergen struct nameidata *nameidata) 7922bad8471SEric Van Hensbergen { 7932bad8471SEric Van Hensbergen struct super_block *sb; 7942bad8471SEric Van Hensbergen struct v9fs_session_info *v9ses; 795bd238fb4SLatchesar Ionkov struct p9_fid *dfid, *fid; 7962bad8471SEric Van Hensbergen struct inode *inode; 797bd238fb4SLatchesar Ionkov char *name; 7982bad8471SEric Van Hensbergen int result = 0; 7992bad8471SEric Van Hensbergen 800bd238fb4SLatchesar Ionkov P9_DPRINTK(P9_DEBUG_VFS, "dir: %p dentry: (%s) %p nameidata: %p\n", 801731805b4SLatchesar Ionkov dir, dentry->d_name.name, dentry, nameidata); 8022bad8471SEric Van Hensbergen 80311e9b49bSSripathi Kodi if (dentry->d_name.len > NAME_MAX) 80411e9b49bSSripathi Kodi return ERR_PTR(-ENAMETOOLONG); 80511e9b49bSSripathi Kodi 8062bad8471SEric Van Hensbergen sb = dir->i_sb; 8072bad8471SEric Van Hensbergen v9ses = v9fs_inode2v9ses(dir); 808a534c8d1SAneesh Kumar K.V /* We can walk d_parent because we hold the dir->i_mutex */ 809bd238fb4SLatchesar Ionkov dfid = v9fs_fid_lookup(dentry->d_parent); 810bd238fb4SLatchesar Ionkov if (IS_ERR(dfid)) 811e231c2eeSDavid Howells return ERR_CAST(dfid); 8122bad8471SEric Van Hensbergen 813bd238fb4SLatchesar Ionkov name = (char *) dentry->d_name.name; 814bd238fb4SLatchesar Ionkov fid = p9_client_walk(dfid, 1, &name, 1); 815bd238fb4SLatchesar Ionkov if (IS_ERR(fid)) { 816bd238fb4SLatchesar Ionkov result = PTR_ERR(fid); 8172bad8471SEric Van Hensbergen if (result == -ENOENT) { 81885e0df24SAneesh Kumar K.V inode = NULL; 81985e0df24SAneesh Kumar K.V goto inst_out; 8202bad8471SEric Van Hensbergen } 8212bad8471SEric Van Hensbergen 822bd238fb4SLatchesar Ionkov return ERR_PTR(result); 8232bad8471SEric Van Hensbergen } 8242bad8471SEric Van Hensbergen 825a78ce05dSAneesh Kumar K.V inode = v9fs_get_inode_from_fid(v9ses, fid, dir->i_sb); 826bd238fb4SLatchesar Ionkov if (IS_ERR(inode)) { 827bd238fb4SLatchesar Ionkov result = PTR_ERR(inode); 828bd238fb4SLatchesar Ionkov inode = NULL; 829bd238fb4SLatchesar Ionkov goto error; 8302bad8471SEric Van Hensbergen } 8312bad8471SEric Van Hensbergen 832bd238fb4SLatchesar Ionkov result = v9fs_fid_add(dentry, fid); 8336a3124a3SLatchesar Ionkov if (result < 0) 8349856af8bSAneesh Kumar K.V goto error_iput; 8356a3124a3SLatchesar Ionkov 83685e0df24SAneesh Kumar K.V inst_out: 8372bad8471SEric Van Hensbergen d_add(dentry, inode); 8382bad8471SEric Van Hensbergen return NULL; 8392bad8471SEric Van Hensbergen 8409856af8bSAneesh Kumar K.V error_iput: 8419856af8bSAneesh Kumar K.V iput(inode); 842bd238fb4SLatchesar Ionkov error: 843bd238fb4SLatchesar Ionkov p9_client_clunk(fid); 844da977b2cSEric Van Hensbergen 8452bad8471SEric Van Hensbergen return ERR_PTR(result); 8462bad8471SEric Van Hensbergen } 8472bad8471SEric Van Hensbergen 8482bad8471SEric Van Hensbergen /** 8492bad8471SEric Van Hensbergen * v9fs_vfs_unlink - VFS unlink hook to delete an inode 8502bad8471SEric Van Hensbergen * @i: inode that is being unlinked 85173c592b9SEric Van Hensbergen * @d: dentry that is being unlinked 8522bad8471SEric Van Hensbergen * 8532bad8471SEric Van Hensbergen */ 8542bad8471SEric Van Hensbergen 85553c06f4eSAneesh Kumar K.V int v9fs_vfs_unlink(struct inode *i, struct dentry *d) 8562bad8471SEric Van Hensbergen { 8572bad8471SEric Van Hensbergen return v9fs_remove(i, d, 0); 8582bad8471SEric Van Hensbergen } 8592bad8471SEric Van Hensbergen 8602bad8471SEric Van Hensbergen /** 8612bad8471SEric Van Hensbergen * v9fs_vfs_rmdir - VFS unlink hook to delete a directory 8622bad8471SEric Van Hensbergen * @i: inode that is being unlinked 86373c592b9SEric Van Hensbergen * @d: dentry that is being unlinked 8642bad8471SEric Van Hensbergen * 8652bad8471SEric Van Hensbergen */ 8662bad8471SEric Van Hensbergen 86753c06f4eSAneesh Kumar K.V int v9fs_vfs_rmdir(struct inode *i, struct dentry *d) 8682bad8471SEric Van Hensbergen { 86948e370ffSAneesh Kumar K.V return v9fs_remove(i, d, AT_REMOVEDIR); 8702bad8471SEric Van Hensbergen } 8712bad8471SEric Van Hensbergen 8722bad8471SEric Van Hensbergen /** 8732bad8471SEric Van Hensbergen * v9fs_vfs_rename - VFS hook to rename an inode 8742bad8471SEric Van Hensbergen * @old_dir: old dir inode 8752bad8471SEric Van Hensbergen * @old_dentry: old dentry 8762bad8471SEric Van Hensbergen * @new_dir: new dir inode 8772bad8471SEric Van Hensbergen * @new_dentry: new dentry 8782bad8471SEric Van Hensbergen * 8792bad8471SEric Van Hensbergen */ 8802bad8471SEric Van Hensbergen 88153c06f4eSAneesh Kumar K.V int 8822bad8471SEric Van Hensbergen v9fs_vfs_rename(struct inode *old_dir, struct dentry *old_dentry, 8832bad8471SEric Van Hensbergen struct inode *new_dir, struct dentry *new_dentry) 8842bad8471SEric Van Hensbergen { 885d28c61f0SAneesh Kumar K.V int retval; 886bd238fb4SLatchesar Ionkov struct inode *old_inode; 887b271ec47SAneesh Kumar K.V struct inode *new_inode; 888bd238fb4SLatchesar Ionkov struct v9fs_session_info *v9ses; 889bd238fb4SLatchesar Ionkov struct p9_fid *oldfid; 890bd238fb4SLatchesar Ionkov struct p9_fid *olddirfid; 891bd238fb4SLatchesar Ionkov struct p9_fid *newdirfid; 892bd238fb4SLatchesar Ionkov struct p9_wstat wstat; 8932bad8471SEric Van Hensbergen 894bd238fb4SLatchesar Ionkov P9_DPRINTK(P9_DEBUG_VFS, "\n"); 895bd238fb4SLatchesar Ionkov retval = 0; 896bd238fb4SLatchesar Ionkov old_inode = old_dentry->d_inode; 897b271ec47SAneesh Kumar K.V new_inode = new_dentry->d_inode; 898bd238fb4SLatchesar Ionkov v9ses = v9fs_inode2v9ses(old_inode); 899bd238fb4SLatchesar Ionkov oldfid = v9fs_fid_lookup(old_dentry); 900da977b2cSEric Van Hensbergen if (IS_ERR(oldfid)) 901da977b2cSEric Van Hensbergen return PTR_ERR(oldfid); 902da977b2cSEric Van Hensbergen 903da977b2cSEric Van Hensbergen olddirfid = v9fs_fid_clone(old_dentry->d_parent); 904da977b2cSEric Van Hensbergen if (IS_ERR(olddirfid)) { 905da977b2cSEric Van Hensbergen retval = PTR_ERR(olddirfid); 906bd238fb4SLatchesar Ionkov goto done; 907da977b2cSEric Van Hensbergen } 908da977b2cSEric Van Hensbergen 909da977b2cSEric Van Hensbergen newdirfid = v9fs_fid_clone(new_dentry->d_parent); 910da977b2cSEric Van Hensbergen if (IS_ERR(newdirfid)) { 911da977b2cSEric Van Hensbergen retval = PTR_ERR(newdirfid); 912bd238fb4SLatchesar Ionkov goto clunk_olddir; 9132bad8471SEric Van Hensbergen } 9142bad8471SEric Van Hensbergen 915a534c8d1SAneesh Kumar K.V down_write(&v9ses->rename_sem); 9164681dbdaSSripathi Kodi if (v9fs_proto_dotl(v9ses)) { 9179e8fb38eSAneesh Kumar K.V retval = p9_client_renameat(olddirfid, old_dentry->d_name.name, 9189e8fb38eSAneesh Kumar K.V newdirfid, new_dentry->d_name.name); 9199e8fb38eSAneesh Kumar K.V if (retval == -EOPNOTSUPP) 9204681dbdaSSripathi Kodi retval = p9_client_rename(oldfid, newdirfid, 9219e8fb38eSAneesh Kumar K.V new_dentry->d_name.name); 9229e8fb38eSAneesh Kumar K.V if (retval != -EOPNOTSUPP) 9234681dbdaSSripathi Kodi goto clunk_newdir; 9244681dbdaSSripathi Kodi } 925a534c8d1SAneesh Kumar K.V if (old_dentry->d_parent != new_dentry->d_parent) { 926a534c8d1SAneesh Kumar K.V /* 927a534c8d1SAneesh Kumar K.V * 9P .u can only handle file rename in the same directory 928a534c8d1SAneesh Kumar K.V */ 9294681dbdaSSripathi Kodi 930bd238fb4SLatchesar Ionkov P9_DPRINTK(P9_DEBUG_ERROR, 931bd238fb4SLatchesar Ionkov "old dir and new dir are different\n"); 932621997cdSEric Van Hensbergen retval = -EXDEV; 933bd238fb4SLatchesar Ionkov goto clunk_newdir; 9342bad8471SEric Van Hensbergen } 935531b1094SLatchesar Ionkov v9fs_blank_wstat(&wstat); 936ba17674fSLatchesar Ionkov wstat.muid = v9ses->uname; 937531b1094SLatchesar Ionkov wstat.name = (char *) new_dentry->d_name.name; 938bd238fb4SLatchesar Ionkov retval = p9_client_wstat(oldfid, &wstat); 9392bad8471SEric Van Hensbergen 940bd238fb4SLatchesar Ionkov clunk_newdir: 941b271ec47SAneesh Kumar K.V if (!retval) { 942b271ec47SAneesh Kumar K.V if (new_inode) { 943b271ec47SAneesh Kumar K.V if (S_ISDIR(new_inode->i_mode)) 944b271ec47SAneesh Kumar K.V clear_nlink(new_inode); 945b271ec47SAneesh Kumar K.V else 946b271ec47SAneesh Kumar K.V drop_nlink(new_inode); 947b271ec47SAneesh Kumar K.V } 948b271ec47SAneesh Kumar K.V if (S_ISDIR(old_inode->i_mode)) { 949b271ec47SAneesh Kumar K.V if (!new_inode) 950b271ec47SAneesh Kumar K.V inc_nlink(new_dir); 951b271ec47SAneesh Kumar K.V drop_nlink(old_dir); 952b271ec47SAneesh Kumar K.V } 9533bc86de3SAneesh Kumar K.V v9fs_invalidate_inode_attr(old_inode); 954d28c61f0SAneesh Kumar K.V v9fs_invalidate_inode_attr(old_dir); 955d28c61f0SAneesh Kumar K.V v9fs_invalidate_inode_attr(new_dir); 9563bc86de3SAneesh Kumar K.V 957a534c8d1SAneesh Kumar K.V /* successful rename */ 958a534c8d1SAneesh Kumar K.V d_move(old_dentry, new_dentry); 959b271ec47SAneesh Kumar K.V } 960a534c8d1SAneesh Kumar K.V up_write(&v9ses->rename_sem); 96122150c4fSLatchesar Ionkov p9_client_clunk(newdirfid); 9622bad8471SEric Van Hensbergen 963bd238fb4SLatchesar Ionkov clunk_olddir: 96422150c4fSLatchesar Ionkov p9_client_clunk(olddirfid); 9652bad8471SEric Van Hensbergen 966bd238fb4SLatchesar Ionkov done: 9672bad8471SEric Van Hensbergen return retval; 9682bad8471SEric Van Hensbergen } 9692bad8471SEric Van Hensbergen 9702bad8471SEric Van Hensbergen /** 971943ffb58SAdrian Bunk * v9fs_vfs_getattr - retrieve file metadata 972ee443996SEric Van Hensbergen * @mnt: mount information 973ee443996SEric Van Hensbergen * @dentry: file to get attributes on 974ee443996SEric Van Hensbergen * @stat: metadata structure to populate 9752bad8471SEric Van Hensbergen * 9762bad8471SEric Van Hensbergen */ 9772bad8471SEric Van Hensbergen 9782bad8471SEric Van Hensbergen static int 9792bad8471SEric Van Hensbergen v9fs_vfs_getattr(struct vfsmount *mnt, struct dentry *dentry, 9802bad8471SEric Van Hensbergen struct kstat *stat) 9812bad8471SEric Van Hensbergen { 982bd238fb4SLatchesar Ionkov int err; 983bd238fb4SLatchesar Ionkov struct v9fs_session_info *v9ses; 984bd238fb4SLatchesar Ionkov struct p9_fid *fid; 98551a87c55SEric Van Hensbergen struct p9_wstat *st; 9862bad8471SEric Van Hensbergen 987bd238fb4SLatchesar Ionkov P9_DPRINTK(P9_DEBUG_VFS, "dentry: %p\n", dentry); 988bd238fb4SLatchesar Ionkov err = -EPERM; 98942869c8aSAneesh Kumar K.V v9ses = v9fs_dentry2v9ses(dentry); 990a1211908SAneesh Kumar K.V if (v9ses->cache == CACHE_LOOSE || v9ses->cache == CACHE_FSCACHE) { 991a1211908SAneesh Kumar K.V generic_fillattr(dentry->d_inode, stat); 992a1211908SAneesh Kumar K.V return 0; 993a1211908SAneesh Kumar K.V } 994bd238fb4SLatchesar Ionkov fid = v9fs_fid_lookup(dentry); 995da977b2cSEric Van Hensbergen if (IS_ERR(fid)) 996da977b2cSEric Van Hensbergen return PTR_ERR(fid); 9972bad8471SEric Van Hensbergen 998bd238fb4SLatchesar Ionkov st = p9_client_stat(fid); 999bd238fb4SLatchesar Ionkov if (IS_ERR(st)) 1000bd238fb4SLatchesar Ionkov return PTR_ERR(st); 10012bad8471SEric Van Hensbergen 1002bd238fb4SLatchesar Ionkov v9fs_stat2inode(st, dentry->d_inode, dentry->d_inode->i_sb); 10032bad8471SEric Van Hensbergen generic_fillattr(dentry->d_inode, stat); 10042bad8471SEric Van Hensbergen 100562b2be59SLatchesar Ionkov p9stat_free(st); 1006bd238fb4SLatchesar Ionkov kfree(st); 1007bd238fb4SLatchesar Ionkov return 0; 10082bad8471SEric Van Hensbergen } 10092bad8471SEric Van Hensbergen 10102bad8471SEric Van Hensbergen /** 10112bad8471SEric Van Hensbergen * v9fs_vfs_setattr - set file metadata 10122bad8471SEric Van Hensbergen * @dentry: file whose metadata to set 10132bad8471SEric Van Hensbergen * @iattr: metadata assignment structure 10142bad8471SEric Van Hensbergen * 10152bad8471SEric Van Hensbergen */ 10162bad8471SEric Van Hensbergen 10172bad8471SEric Van Hensbergen static int v9fs_vfs_setattr(struct dentry *dentry, struct iattr *iattr) 10182bad8471SEric Van Hensbergen { 1019bd238fb4SLatchesar Ionkov int retval; 1020bd238fb4SLatchesar Ionkov struct v9fs_session_info *v9ses; 1021bd238fb4SLatchesar Ionkov struct p9_fid *fid; 1022bd238fb4SLatchesar Ionkov struct p9_wstat wstat; 10232bad8471SEric Van Hensbergen 1024bd238fb4SLatchesar Ionkov P9_DPRINTK(P9_DEBUG_VFS, "\n"); 1025059c138bSAneesh Kumar K.V retval = inode_change_ok(dentry->d_inode, iattr); 1026059c138bSAneesh Kumar K.V if (retval) 1027059c138bSAneesh Kumar K.V return retval; 1028059c138bSAneesh Kumar K.V 1029bd238fb4SLatchesar Ionkov retval = -EPERM; 103042869c8aSAneesh Kumar K.V v9ses = v9fs_dentry2v9ses(dentry); 1031bd238fb4SLatchesar Ionkov fid = v9fs_fid_lookup(dentry); 1032da977b2cSEric Van Hensbergen if(IS_ERR(fid)) 1033da977b2cSEric Van Hensbergen return PTR_ERR(fid); 10342bad8471SEric Van Hensbergen 1035531b1094SLatchesar Ionkov v9fs_blank_wstat(&wstat); 10362bad8471SEric Van Hensbergen if (iattr->ia_valid & ATTR_MODE) 1037531b1094SLatchesar Ionkov wstat.mode = unixmode2p9mode(v9ses, iattr->ia_mode); 10382bad8471SEric Van Hensbergen 10392bad8471SEric Van Hensbergen if (iattr->ia_valid & ATTR_MTIME) 1040531b1094SLatchesar Ionkov wstat.mtime = iattr->ia_mtime.tv_sec; 10412bad8471SEric Van Hensbergen 10422bad8471SEric Van Hensbergen if (iattr->ia_valid & ATTR_ATIME) 1043531b1094SLatchesar Ionkov wstat.atime = iattr->ia_atime.tv_sec; 10442bad8471SEric Van Hensbergen 10452bad8471SEric Van Hensbergen if (iattr->ia_valid & ATTR_SIZE) 1046531b1094SLatchesar Ionkov wstat.length = iattr->ia_size; 10472bad8471SEric Van Hensbergen 1048dd6102fbSSripathi Kodi if (v9fs_proto_dotu(v9ses)) { 1049531b1094SLatchesar Ionkov if (iattr->ia_valid & ATTR_UID) 1050531b1094SLatchesar Ionkov wstat.n_uid = iattr->ia_uid; 10512bad8471SEric Van Hensbergen 1052531b1094SLatchesar Ionkov if (iattr->ia_valid & ATTR_GID) 1053531b1094SLatchesar Ionkov wstat.n_gid = iattr->ia_gid; 10542bad8471SEric Van Hensbergen } 1055059c138bSAneesh Kumar K.V 10563dc5436aSAneesh Kumar K.V /* Write all dirty data */ 10573dc5436aSAneesh Kumar K.V if (S_ISREG(dentry->d_inode->i_mode)) 10583dc5436aSAneesh Kumar K.V filemap_write_and_wait(dentry->d_inode->i_mapping); 10593dc5436aSAneesh Kumar K.V 1060f10fc50fSAneesh Kumar K.V retval = p9_client_wstat(fid, &wstat); 1061f10fc50fSAneesh Kumar K.V if (retval < 0) 1062f10fc50fSAneesh Kumar K.V return retval; 1063059c138bSAneesh Kumar K.V 1064059c138bSAneesh Kumar K.V if ((iattr->ia_valid & ATTR_SIZE) && 1065059c138bSAneesh Kumar K.V iattr->ia_size != i_size_read(dentry->d_inode)) 1066059c138bSAneesh Kumar K.V truncate_setsize(dentry->d_inode, iattr->ia_size); 1067059c138bSAneesh Kumar K.V 1068f10fc50fSAneesh Kumar K.V v9fs_invalidate_inode_attr(dentry->d_inode); 10691025774cSChristoph Hellwig 10701025774cSChristoph Hellwig setattr_copy(dentry->d_inode, iattr); 10711025774cSChristoph Hellwig mark_inode_dirty(dentry->d_inode); 10721025774cSChristoph Hellwig return 0; 10732bad8471SEric Van Hensbergen } 10742bad8471SEric Van Hensbergen 10752bad8471SEric Van Hensbergen /** 1076531b1094SLatchesar Ionkov * v9fs_stat2inode - populate an inode structure with mistat info 1077531b1094SLatchesar Ionkov * @stat: Plan 9 metadata (mistat) structure 10782bad8471SEric Van Hensbergen * @inode: inode to populate 10792bad8471SEric Van Hensbergen * @sb: superblock of filesystem 10802bad8471SEric Van Hensbergen * 10812bad8471SEric Van Hensbergen */ 10822bad8471SEric Van Hensbergen 10832bad8471SEric Van Hensbergen void 108451a87c55SEric Van Hensbergen v9fs_stat2inode(struct p9_wstat *stat, struct inode *inode, 10852bad8471SEric Van Hensbergen struct super_block *sb) 10862bad8471SEric Van Hensbergen { 1087531b1094SLatchesar Ionkov char ext[32]; 10885717144aSAneesh Kumar K.V char tag_name[14]; 10895717144aSAneesh Kumar K.V unsigned int i_nlink; 10902bad8471SEric Van Hensbergen struct v9fs_session_info *v9ses = sb->s_fs_info; 1091b3cbea03SAneesh Kumar K.V struct v9fs_inode *v9inode = V9FS_I(inode); 10922bad8471SEric Van Hensbergen 10932bad8471SEric Van Hensbergen inode->i_nlink = 1; 10942bad8471SEric Van Hensbergen 1095531b1094SLatchesar Ionkov inode->i_atime.tv_sec = stat->atime; 1096531b1094SLatchesar Ionkov inode->i_mtime.tv_sec = stat->mtime; 1097531b1094SLatchesar Ionkov inode->i_ctime.tv_sec = stat->mtime; 10982bad8471SEric Van Hensbergen 1099bd32b82dSLatchesar Ionkov inode->i_uid = v9ses->dfltuid; 1100bd32b82dSLatchesar Ionkov inode->i_gid = v9ses->dfltgid; 11012bad8471SEric Van Hensbergen 1102dd6102fbSSripathi Kodi if (v9fs_proto_dotu(v9ses)) { 1103531b1094SLatchesar Ionkov inode->i_uid = stat->n_uid; 1104531b1094SLatchesar Ionkov inode->i_gid = stat->n_gid; 1105531b1094SLatchesar Ionkov } 11065717144aSAneesh Kumar K.V if ((S_ISREG(inode->i_mode)) || (S_ISDIR(inode->i_mode))) { 11075717144aSAneesh Kumar K.V if (v9fs_proto_dotu(v9ses) && (stat->extension[0] != '\0')) { 11085717144aSAneesh Kumar K.V /* 11095717144aSAneesh Kumar K.V * Hadlink support got added later to 11105717144aSAneesh Kumar K.V * to the .u extension. So there can be 11115717144aSAneesh Kumar K.V * server out there that doesn't support 11125717144aSAneesh Kumar K.V * this even with .u extension. So check 11135717144aSAneesh Kumar K.V * for non NULL stat->extension 11145717144aSAneesh Kumar K.V */ 11155717144aSAneesh Kumar K.V strncpy(ext, stat->extension, sizeof(ext)); 11165717144aSAneesh Kumar K.V /* HARDLINKCOUNT %u */ 11175717144aSAneesh Kumar K.V sscanf(ext, "%13s %u", tag_name, &i_nlink); 11185717144aSAneesh Kumar K.V if (!strncmp(tag_name, "HARDLINKCOUNT", 13)) 11195717144aSAneesh Kumar K.V inode->i_nlink = i_nlink; 11205717144aSAneesh Kumar K.V } 11215717144aSAneesh Kumar K.V } 1122531b1094SLatchesar Ionkov inode->i_mode = p9mode2unixmode(v9ses, stat->mode); 11232bad8471SEric Van Hensbergen if ((S_ISBLK(inode->i_mode)) || (S_ISCHR(inode->i_mode))) { 11242bad8471SEric Van Hensbergen char type = 0; 11252bad8471SEric Van Hensbergen int major = -1; 11262bad8471SEric Van Hensbergen int minor = -1; 1127531b1094SLatchesar Ionkov 112851a87c55SEric Van Hensbergen strncpy(ext, stat->extension, sizeof(ext)); 1129531b1094SLatchesar Ionkov sscanf(ext, "%c %u %u", &type, &major, &minor); 11302bad8471SEric Van Hensbergen switch (type) { 11312bad8471SEric Van Hensbergen case 'c': 11322bad8471SEric Van Hensbergen inode->i_mode &= ~S_IFBLK; 11332bad8471SEric Van Hensbergen inode->i_mode |= S_IFCHR; 11342bad8471SEric Van Hensbergen break; 11352bad8471SEric Van Hensbergen case 'b': 11362bad8471SEric Van Hensbergen break; 11372bad8471SEric Van Hensbergen default: 1138bd238fb4SLatchesar Ionkov P9_DPRINTK(P9_DEBUG_ERROR, 113951a87c55SEric Van Hensbergen "Unknown special type %c %s\n", type, 114051a87c55SEric Van Hensbergen stat->extension); 11412bad8471SEric Van Hensbergen }; 11422bad8471SEric Van Hensbergen inode->i_rdev = MKDEV(major, minor); 114357c7b4e6SMagnus Deininger init_special_inode(inode, inode->i_mode, inode->i_rdev); 11442bad8471SEric Van Hensbergen } else 11452bad8471SEric Van Hensbergen inode->i_rdev = 0; 11462bad8471SEric Van Hensbergen 11477549ae3eSAbhishek Kulkarni i_size_write(inode, stat->length); 11482bad8471SEric Van Hensbergen 1149bd238fb4SLatchesar Ionkov /* not real number of blocks, but 512 byte ones ... */ 11507549ae3eSAbhishek Kulkarni inode->i_blocks = (i_size_read(inode) + 512 - 1) >> 9; 1151b3cbea03SAneesh Kumar K.V v9inode->cache_validity &= ~V9FS_INO_INVALID_ATTR; 11522bad8471SEric Van Hensbergen } 11532bad8471SEric Van Hensbergen 11542bad8471SEric Van Hensbergen /** 11552bad8471SEric Van Hensbergen * v9fs_qid2ino - convert qid into inode number 11562bad8471SEric Van Hensbergen * @qid: qid to hash 11572bad8471SEric Van Hensbergen * 11582bad8471SEric Van Hensbergen * BUG: potential for inode number collisions? 11592bad8471SEric Van Hensbergen */ 11602bad8471SEric Van Hensbergen 1161bd238fb4SLatchesar Ionkov ino_t v9fs_qid2ino(struct p9_qid *qid) 11622bad8471SEric Van Hensbergen { 11632bad8471SEric Van Hensbergen u64 path = qid->path + 2; 11642bad8471SEric Van Hensbergen ino_t i = 0; 11652bad8471SEric Van Hensbergen 11662bad8471SEric Van Hensbergen if (sizeof(ino_t) == sizeof(path)) 11672bad8471SEric Van Hensbergen memcpy(&i, &path, sizeof(ino_t)); 11682bad8471SEric Van Hensbergen else 11692bad8471SEric Van Hensbergen i = (ino_t) (path ^ (path >> 32)); 11702bad8471SEric Van Hensbergen 11712bad8471SEric Van Hensbergen return i; 11722bad8471SEric Van Hensbergen } 11732bad8471SEric Van Hensbergen 11742bad8471SEric Van Hensbergen /** 11752bad8471SEric Van Hensbergen * v9fs_readlink - read a symlink's location (internal version) 11762bad8471SEric Van Hensbergen * @dentry: dentry for symlink 117773c592b9SEric Van Hensbergen * @buffer: buffer to load symlink location into 11782bad8471SEric Van Hensbergen * @buflen: length of buffer 11792bad8471SEric Van Hensbergen * 11802bad8471SEric Van Hensbergen */ 11812bad8471SEric Van Hensbergen 11822bad8471SEric Van Hensbergen static int v9fs_readlink(struct dentry *dentry, char *buffer, int buflen) 11832bad8471SEric Van Hensbergen { 1184bd238fb4SLatchesar Ionkov int retval; 11852bad8471SEric Van Hensbergen 1186bd238fb4SLatchesar Ionkov struct v9fs_session_info *v9ses; 1187bd238fb4SLatchesar Ionkov struct p9_fid *fid; 118851a87c55SEric Van Hensbergen struct p9_wstat *st; 11892bad8471SEric Van Hensbergen 1190bd238fb4SLatchesar Ionkov P9_DPRINTK(P9_DEBUG_VFS, " %s\n", dentry->d_name.name); 1191bd238fb4SLatchesar Ionkov retval = -EPERM; 119242869c8aSAneesh Kumar K.V v9ses = v9fs_dentry2v9ses(dentry); 1193bd238fb4SLatchesar Ionkov fid = v9fs_fid_lookup(dentry); 1194da977b2cSEric Van Hensbergen if (IS_ERR(fid)) 1195da977b2cSEric Van Hensbergen return PTR_ERR(fid); 11962bad8471SEric Van Hensbergen 1197329176ccSM. Mohan Kumar if (!v9fs_proto_dotu(v9ses)) 1198bd238fb4SLatchesar Ionkov return -EBADF; 11992bad8471SEric Van Hensbergen 1200bd238fb4SLatchesar Ionkov st = p9_client_stat(fid); 1201bd238fb4SLatchesar Ionkov if (IS_ERR(st)) 1202bd238fb4SLatchesar Ionkov return PTR_ERR(st); 12032bad8471SEric Van Hensbergen 1204bd238fb4SLatchesar Ionkov if (!(st->mode & P9_DMSYMLINK)) { 12052bad8471SEric Van Hensbergen retval = -EINVAL; 1206bd238fb4SLatchesar Ionkov goto done; 12072bad8471SEric Van Hensbergen } 12082bad8471SEric Van Hensbergen 12092bad8471SEric Van Hensbergen /* copy extension buffer into buffer */ 121051a87c55SEric Van Hensbergen strncpy(buffer, st->extension, buflen); 12112bad8471SEric Van Hensbergen 1212bd238fb4SLatchesar Ionkov P9_DPRINTK(P9_DEBUG_VFS, 121351a87c55SEric Van Hensbergen "%s -> %s (%s)\n", dentry->d_name.name, st->extension, buffer); 1214bd238fb4SLatchesar Ionkov 12152511cd0bSMartin Stava retval = strnlen(buffer, buflen); 1216bd238fb4SLatchesar Ionkov done: 121762b2be59SLatchesar Ionkov p9stat_free(st); 1218bd238fb4SLatchesar Ionkov kfree(st); 12192bad8471SEric Van Hensbergen return retval; 12202bad8471SEric Van Hensbergen } 12212bad8471SEric Van Hensbergen 12222bad8471SEric Van Hensbergen /** 12232bad8471SEric Van Hensbergen * v9fs_vfs_follow_link - follow a symlink path 12242bad8471SEric Van Hensbergen * @dentry: dentry for symlink 12252bad8471SEric Van Hensbergen * @nd: nameidata 12262bad8471SEric Van Hensbergen * 12272bad8471SEric Van Hensbergen */ 12282bad8471SEric Van Hensbergen 12292bad8471SEric Van Hensbergen static void *v9fs_vfs_follow_link(struct dentry *dentry, struct nameidata *nd) 12302bad8471SEric Van Hensbergen { 12312bad8471SEric Van Hensbergen int len = 0; 12322bad8471SEric Van Hensbergen char *link = __getname(); 12332bad8471SEric Van Hensbergen 1234bd238fb4SLatchesar Ionkov P9_DPRINTK(P9_DEBUG_VFS, "%s n", dentry->d_name.name); 12352bad8471SEric Van Hensbergen 12362bad8471SEric Van Hensbergen if (!link) 12372bad8471SEric Van Hensbergen link = ERR_PTR(-ENOMEM); 12382bad8471SEric Van Hensbergen else { 123916cce6d2SLatchesar Ionkov len = v9fs_readlink(dentry, link, PATH_MAX); 12402bad8471SEric Van Hensbergen 12412bad8471SEric Van Hensbergen if (len < 0) { 1242ce44eeb6SDavi Arnaut __putname(link); 12432bad8471SEric Van Hensbergen link = ERR_PTR(len); 12442bad8471SEric Van Hensbergen } else 12452511cd0bSMartin Stava link[min(len, PATH_MAX-1)] = 0; 12462bad8471SEric Van Hensbergen } 12472bad8471SEric Van Hensbergen nd_set_link(nd, link); 12482bad8471SEric Van Hensbergen 12492bad8471SEric Van Hensbergen return NULL; 12502bad8471SEric Van Hensbergen } 12512bad8471SEric Van Hensbergen 12522bad8471SEric Van Hensbergen /** 12532bad8471SEric Van Hensbergen * v9fs_vfs_put_link - release a symlink path 12542bad8471SEric Van Hensbergen * @dentry: dentry for symlink 12552bad8471SEric Van Hensbergen * @nd: nameidata 1256ee443996SEric Van Hensbergen * @p: unused 12572bad8471SEric Van Hensbergen * 12582bad8471SEric Van Hensbergen */ 12592bad8471SEric Van Hensbergen 126053c06f4eSAneesh Kumar K.V void 1261ee443996SEric Van Hensbergen v9fs_vfs_put_link(struct dentry *dentry, struct nameidata *nd, void *p) 12622bad8471SEric Van Hensbergen { 12632bad8471SEric Van Hensbergen char *s = nd_get_link(nd); 12642bad8471SEric Van Hensbergen 12656ff23207SDuane Griffin P9_DPRINTK(P9_DEBUG_VFS, " %s %s\n", dentry->d_name.name, 12666ff23207SDuane Griffin IS_ERR(s) ? "<error>" : s); 12672bad8471SEric Van Hensbergen if (!IS_ERR(s)) 1268ce44eeb6SDavi Arnaut __putname(s); 12692bad8471SEric Van Hensbergen } 12702bad8471SEric Van Hensbergen 1271ee443996SEric Van Hensbergen /** 1272ee443996SEric Van Hensbergen * v9fs_vfs_mkspecial - create a special file 1273ee443996SEric Van Hensbergen * @dir: inode to create special file in 1274ee443996SEric Van Hensbergen * @dentry: dentry to create 1275ee443996SEric Van Hensbergen * @mode: mode to create special file 1276ee443996SEric Van Hensbergen * @extension: 9p2000.u format extension string representing special file 1277ee443996SEric Van Hensbergen * 1278ee443996SEric Van Hensbergen */ 1279ee443996SEric Van Hensbergen 1280531b1094SLatchesar Ionkov static int v9fs_vfs_mkspecial(struct inode *dir, struct dentry *dentry, 1281531b1094SLatchesar Ionkov int mode, const char *extension) 1282531b1094SLatchesar Ionkov { 1283bd238fb4SLatchesar Ionkov u32 perm; 1284bd238fb4SLatchesar Ionkov struct p9_fid *fid; 1285d28c61f0SAneesh Kumar K.V struct v9fs_session_info *v9ses; 1286531b1094SLatchesar Ionkov 12876a3124a3SLatchesar Ionkov v9ses = v9fs_inode2v9ses(dir); 1288dd6102fbSSripathi Kodi if (!v9fs_proto_dotu(v9ses)) { 1289bd238fb4SLatchesar Ionkov P9_DPRINTK(P9_DEBUG_ERROR, "not extended\n"); 12906a3124a3SLatchesar Ionkov return -EPERM; 1291531b1094SLatchesar Ionkov } 1292531b1094SLatchesar Ionkov 1293da977b2cSEric Van Hensbergen perm = unixmode2p9mode(v9ses, mode); 1294bd238fb4SLatchesar Ionkov fid = v9fs_create(v9ses, dir, dentry, (char *) extension, perm, 1295bd238fb4SLatchesar Ionkov P9_OREAD); 1296bd238fb4SLatchesar Ionkov if (IS_ERR(fid)) 1297bd238fb4SLatchesar Ionkov return PTR_ERR(fid); 1298da977b2cSEric Van Hensbergen 1299d28c61f0SAneesh Kumar K.V v9fs_invalidate_inode_attr(dir); 1300bd238fb4SLatchesar Ionkov p9_client_clunk(fid); 13016a3124a3SLatchesar Ionkov return 0; 1302531b1094SLatchesar Ionkov } 1303531b1094SLatchesar Ionkov 1304531b1094SLatchesar Ionkov /** 1305531b1094SLatchesar Ionkov * v9fs_vfs_symlink - helper function to create symlinks 1306531b1094SLatchesar Ionkov * @dir: directory inode containing symlink 1307531b1094SLatchesar Ionkov * @dentry: dentry for symlink 1308531b1094SLatchesar Ionkov * @symname: symlink data 1309531b1094SLatchesar Ionkov * 1310ee443996SEric Van Hensbergen * See Also: 9P2000.u RFC for more information 1311531b1094SLatchesar Ionkov * 1312531b1094SLatchesar Ionkov */ 1313531b1094SLatchesar Ionkov 1314531b1094SLatchesar Ionkov static int 1315531b1094SLatchesar Ionkov v9fs_vfs_symlink(struct inode *dir, struct dentry *dentry, const char *symname) 1316531b1094SLatchesar Ionkov { 1317bd238fb4SLatchesar Ionkov P9_DPRINTK(P9_DEBUG_VFS, " %lu,%s,%s\n", dir->i_ino, 1318bd238fb4SLatchesar Ionkov dentry->d_name.name, symname); 1319531b1094SLatchesar Ionkov 1320531b1094SLatchesar Ionkov return v9fs_vfs_mkspecial(dir, dentry, S_IFLNK, symname); 1321531b1094SLatchesar Ionkov } 1322531b1094SLatchesar Ionkov 13232bad8471SEric Van Hensbergen /** 13242bad8471SEric Van Hensbergen * v9fs_vfs_link - create a hardlink 13252bad8471SEric Van Hensbergen * @old_dentry: dentry for file to link to 13262bad8471SEric Van Hensbergen * @dir: inode destination for new link 132773c592b9SEric Van Hensbergen * @dentry: dentry for link 13282bad8471SEric Van Hensbergen * 13292bad8471SEric Van Hensbergen */ 13302bad8471SEric Van Hensbergen 13312bad8471SEric Van Hensbergen static int 13322bad8471SEric Van Hensbergen v9fs_vfs_link(struct dentry *old_dentry, struct inode *dir, 13332bad8471SEric Van Hensbergen struct dentry *dentry) 13342bad8471SEric Van Hensbergen { 1335531b1094SLatchesar Ionkov int retval; 1336531b1094SLatchesar Ionkov char *name; 1337d28c61f0SAneesh Kumar K.V struct p9_fid *oldfid; 13382bad8471SEric Van Hensbergen 1339bd238fb4SLatchesar Ionkov P9_DPRINTK(P9_DEBUG_VFS, 1340bd238fb4SLatchesar Ionkov " %lu,%s,%s\n", dir->i_ino, dentry->d_name.name, 13412bad8471SEric Van Hensbergen old_dentry->d_name.name); 13422bad8471SEric Van Hensbergen 1343da977b2cSEric Van Hensbergen oldfid = v9fs_fid_clone(old_dentry); 1344da977b2cSEric Van Hensbergen if (IS_ERR(oldfid)) 1345da977b2cSEric Van Hensbergen return PTR_ERR(oldfid); 13462bad8471SEric Van Hensbergen 1347531b1094SLatchesar Ionkov name = __getname(); 1348da977b2cSEric Van Hensbergen if (unlikely(!name)) { 1349da977b2cSEric Van Hensbergen retval = -ENOMEM; 1350da977b2cSEric Van Hensbergen goto clunk_fid; 1351da977b2cSEric Van Hensbergen } 13520710d36aSFlorin Malita 135316cce6d2SLatchesar Ionkov sprintf(name, "%d\n", oldfid->fid); 1354bd238fb4SLatchesar Ionkov retval = v9fs_vfs_mkspecial(dir, dentry, P9_DMLINK, name); 1355531b1094SLatchesar Ionkov __putname(name); 1356c06c066aSAneesh Kumar K.V if (!retval) { 1357c06c066aSAneesh Kumar K.V v9fs_refresh_inode(oldfid, old_dentry->d_inode); 1358d28c61f0SAneesh Kumar K.V v9fs_invalidate_inode_attr(dir); 1359c06c066aSAneesh Kumar K.V } 1360da977b2cSEric Van Hensbergen clunk_fid: 1361bd238fb4SLatchesar Ionkov p9_client_clunk(oldfid); 13622bad8471SEric Van Hensbergen return retval; 13632bad8471SEric Van Hensbergen } 13642bad8471SEric Van Hensbergen 13652bad8471SEric Van Hensbergen /** 13662bad8471SEric Van Hensbergen * v9fs_vfs_mknod - create a special file 13672bad8471SEric Van Hensbergen * @dir: inode destination for new link 13682bad8471SEric Van Hensbergen * @dentry: dentry for file 13692bad8471SEric Van Hensbergen * @mode: mode for creation 1370ee443996SEric Van Hensbergen * @rdev: device associated with special file 13712bad8471SEric Van Hensbergen * 13722bad8471SEric Van Hensbergen */ 13732bad8471SEric Van Hensbergen 13742bad8471SEric Van Hensbergen static int 13752bad8471SEric Van Hensbergen v9fs_vfs_mknod(struct inode *dir, struct dentry *dentry, int mode, dev_t rdev) 13762bad8471SEric Van Hensbergen { 1377531b1094SLatchesar Ionkov int retval; 1378531b1094SLatchesar Ionkov char *name; 13792bad8471SEric Van Hensbergen 1380bd238fb4SLatchesar Ionkov P9_DPRINTK(P9_DEBUG_VFS, 1381bd238fb4SLatchesar Ionkov " %lu,%s mode: %x MAJOR: %u MINOR: %u\n", dir->i_ino, 13822bad8471SEric Van Hensbergen dentry->d_name.name, mode, MAJOR(rdev), MINOR(rdev)); 13832bad8471SEric Van Hensbergen 1384531b1094SLatchesar Ionkov if (!new_valid_dev(rdev)) 1385531b1094SLatchesar Ionkov return -EINVAL; 138673c592b9SEric Van Hensbergen 1387531b1094SLatchesar Ionkov name = __getname(); 1388c0291a05SEugene Teo if (!name) 1389c0291a05SEugene Teo return -ENOMEM; 13902bad8471SEric Van Hensbergen /* build extension */ 13912bad8471SEric Van Hensbergen if (S_ISBLK(mode)) 1392531b1094SLatchesar Ionkov sprintf(name, "b %u %u", MAJOR(rdev), MINOR(rdev)); 13932bad8471SEric Van Hensbergen else if (S_ISCHR(mode)) 1394531b1094SLatchesar Ionkov sprintf(name, "c %u %u", MAJOR(rdev), MINOR(rdev)); 139573c592b9SEric Van Hensbergen else if (S_ISFIFO(mode)) 1396531b1094SLatchesar Ionkov *name = 0; 139775cc5c9bSVenkateswararao Jujjuri else if (S_ISSOCK(mode)) 139875cc5c9bSVenkateswararao Jujjuri *name = 0; 13992bad8471SEric Van Hensbergen else { 1400531b1094SLatchesar Ionkov __putname(name); 1401531b1094SLatchesar Ionkov return -EINVAL; 14022bad8471SEric Van Hensbergen } 14032bad8471SEric Van Hensbergen 1404531b1094SLatchesar Ionkov retval = v9fs_vfs_mkspecial(dir, dentry, mode, name); 1405531b1094SLatchesar Ionkov __putname(name); 14062bad8471SEric Van Hensbergen 14072bad8471SEric Van Hensbergen return retval; 14082bad8471SEric Van Hensbergen } 14092bad8471SEric Van Hensbergen 1410b3cbea03SAneesh Kumar K.V int v9fs_refresh_inode(struct p9_fid *fid, struct inode *inode) 1411b3cbea03SAneesh Kumar K.V { 1412b3cbea03SAneesh Kumar K.V loff_t i_size; 1413b3cbea03SAneesh Kumar K.V struct p9_wstat *st; 1414b3cbea03SAneesh Kumar K.V struct v9fs_session_info *v9ses; 1415b3cbea03SAneesh Kumar K.V 1416b3cbea03SAneesh Kumar K.V v9ses = v9fs_inode2v9ses(inode); 1417b3cbea03SAneesh Kumar K.V st = p9_client_stat(fid); 1418b3cbea03SAneesh Kumar K.V if (IS_ERR(st)) 1419b3cbea03SAneesh Kumar K.V return PTR_ERR(st); 1420b3cbea03SAneesh Kumar K.V 1421b3cbea03SAneesh Kumar K.V spin_lock(&inode->i_lock); 1422b3cbea03SAneesh Kumar K.V /* 1423b3cbea03SAneesh Kumar K.V * We don't want to refresh inode->i_size, 1424b3cbea03SAneesh Kumar K.V * because we may have cached data 1425b3cbea03SAneesh Kumar K.V */ 1426b3cbea03SAneesh Kumar K.V i_size = inode->i_size; 1427b3cbea03SAneesh Kumar K.V v9fs_stat2inode(st, inode, inode->i_sb); 1428b3cbea03SAneesh Kumar K.V if (v9ses->cache) 1429b3cbea03SAneesh Kumar K.V inode->i_size = i_size; 1430b3cbea03SAneesh Kumar K.V spin_unlock(&inode->i_lock); 1431b3cbea03SAneesh Kumar K.V p9stat_free(st); 1432b3cbea03SAneesh Kumar K.V kfree(st); 1433b3cbea03SAneesh Kumar K.V return 0; 1434b3cbea03SAneesh Kumar K.V } 1435b3cbea03SAneesh Kumar K.V 14369b6533c9SSripathi Kodi static const struct inode_operations v9fs_dir_inode_operations_dotu = { 14379b6533c9SSripathi Kodi .create = v9fs_vfs_create, 14389b6533c9SSripathi Kodi .lookup = v9fs_vfs_lookup, 14399b6533c9SSripathi Kodi .symlink = v9fs_vfs_symlink, 144050cc42ffSVenkateswararao Jujjuri (JV) .link = v9fs_vfs_link, 14419b6533c9SSripathi Kodi .unlink = v9fs_vfs_unlink, 14429b6533c9SSripathi Kodi .mkdir = v9fs_vfs_mkdir, 14439b6533c9SSripathi Kodi .rmdir = v9fs_vfs_rmdir, 14441d76e313SAneesh Kumar K.V .mknod = v9fs_vfs_mknod, 14459b6533c9SSripathi Kodi .rename = v9fs_vfs_rename, 14469b6533c9SSripathi Kodi .getattr = v9fs_vfs_getattr, 14479b6533c9SSripathi Kodi .setattr = v9fs_vfs_setattr, 14489b6533c9SSripathi Kodi }; 14499b6533c9SSripathi Kodi 1450754661f1SArjan van de Ven static const struct inode_operations v9fs_dir_inode_operations = { 1451b501611aSEric Van Hensbergen .create = v9fs_vfs_create, 1452b501611aSEric Van Hensbergen .lookup = v9fs_vfs_lookup, 1453b501611aSEric Van Hensbergen .unlink = v9fs_vfs_unlink, 1454b501611aSEric Van Hensbergen .mkdir = v9fs_vfs_mkdir, 1455b501611aSEric Van Hensbergen .rmdir = v9fs_vfs_rmdir, 1456b501611aSEric Van Hensbergen .mknod = v9fs_vfs_mknod, 1457b501611aSEric Van Hensbergen .rename = v9fs_vfs_rename, 1458b501611aSEric Van Hensbergen .getattr = v9fs_vfs_getattr, 1459b501611aSEric Van Hensbergen .setattr = v9fs_vfs_setattr, 1460b501611aSEric Van Hensbergen }; 1461b501611aSEric Van Hensbergen 1462754661f1SArjan van de Ven static const struct inode_operations v9fs_file_inode_operations = { 14632bad8471SEric Van Hensbergen .getattr = v9fs_vfs_getattr, 14642bad8471SEric Van Hensbergen .setattr = v9fs_vfs_setattr, 14652bad8471SEric Van Hensbergen }; 14662bad8471SEric Van Hensbergen 1467754661f1SArjan van de Ven static const struct inode_operations v9fs_symlink_inode_operations = { 1468204f2f0eSAl Viro .readlink = generic_readlink, 14692bad8471SEric Van Hensbergen .follow_link = v9fs_vfs_follow_link, 14702bad8471SEric Van Hensbergen .put_link = v9fs_vfs_put_link, 14712bad8471SEric Van Hensbergen .getattr = v9fs_vfs_getattr, 14722bad8471SEric Van Hensbergen .setattr = v9fs_vfs_setattr, 14732bad8471SEric Van Hensbergen }; 14749b6533c9SSripathi Kodi 1475