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> 38bd238fb4SLatchesar Ionkov #include <net/9p/9p.h> 39bd238fb4SLatchesar Ionkov #include <net/9p/client.h> 402bad8471SEric Van Hensbergen 412bad8471SEric Van Hensbergen #include "v9fs.h" 422bad8471SEric Van Hensbergen #include "v9fs_vfs.h" 432bad8471SEric Van Hensbergen #include "fid.h" 4460e78d2cSAbhishek Kulkarni #include "cache.h" 452bad8471SEric Van Hensbergen 46754661f1SArjan van de Ven static const struct inode_operations v9fs_dir_inode_operations; 479b6533c9SSripathi Kodi static const struct inode_operations v9fs_dir_inode_operations_dotu; 489b6533c9SSripathi Kodi static const struct inode_operations v9fs_dir_inode_operations_dotl; 49754661f1SArjan van de Ven static const struct inode_operations v9fs_file_inode_operations; 509b6533c9SSripathi Kodi static const struct inode_operations v9fs_file_inode_operations_dotl; 51754661f1SArjan van de Ven static const struct inode_operations v9fs_symlink_inode_operations; 529b6533c9SSripathi Kodi static const struct inode_operations v9fs_symlink_inode_operations_dotl; 532bad8471SEric Van Hensbergen 542bad8471SEric Van Hensbergen /** 552bad8471SEric Van Hensbergen * unixmode2p9mode - convert unix mode bits to plan 9 562bad8471SEric Van Hensbergen * @v9ses: v9fs session information 572bad8471SEric Van Hensbergen * @mode: mode to convert 582bad8471SEric Van Hensbergen * 592bad8471SEric Van Hensbergen */ 602bad8471SEric Van Hensbergen 6173c592b9SEric Van Hensbergen static int unixmode2p9mode(struct v9fs_session_info *v9ses, int mode) 622bad8471SEric Van Hensbergen { 632bad8471SEric Van Hensbergen int res; 642bad8471SEric Van Hensbergen res = mode & 0777; 652bad8471SEric Van Hensbergen if (S_ISDIR(mode)) 66bd238fb4SLatchesar Ionkov res |= P9_DMDIR; 67dd6102fbSSripathi Kodi if (v9fs_proto_dotu(v9ses)) { 682bad8471SEric Van Hensbergen if (S_ISLNK(mode)) 69bd238fb4SLatchesar Ionkov res |= P9_DMSYMLINK; 702bad8471SEric Van Hensbergen if (v9ses->nodev == 0) { 712bad8471SEric Van Hensbergen if (S_ISSOCK(mode)) 72bd238fb4SLatchesar Ionkov res |= P9_DMSOCKET; 732bad8471SEric Van Hensbergen if (S_ISFIFO(mode)) 74bd238fb4SLatchesar Ionkov res |= P9_DMNAMEDPIPE; 752bad8471SEric Van Hensbergen if (S_ISBLK(mode)) 76bd238fb4SLatchesar Ionkov res |= P9_DMDEVICE; 772bad8471SEric Van Hensbergen if (S_ISCHR(mode)) 78bd238fb4SLatchesar Ionkov res |= P9_DMDEVICE; 792bad8471SEric Van Hensbergen } 802bad8471SEric Van Hensbergen 812bad8471SEric Van Hensbergen if ((mode & S_ISUID) == S_ISUID) 82bd238fb4SLatchesar Ionkov res |= P9_DMSETUID; 832bad8471SEric Van Hensbergen if ((mode & S_ISGID) == S_ISGID) 84bd238fb4SLatchesar Ionkov res |= P9_DMSETGID; 85d199d652SAnthony Liguori if ((mode & S_ISVTX) == S_ISVTX) 86d199d652SAnthony Liguori res |= P9_DMSETVTX; 87bd238fb4SLatchesar Ionkov if ((mode & P9_DMLINK)) 88bd238fb4SLatchesar Ionkov res |= P9_DMLINK; 892bad8471SEric Van Hensbergen } 902bad8471SEric Van Hensbergen 912bad8471SEric Van Hensbergen return res; 922bad8471SEric Van Hensbergen } 932bad8471SEric Van Hensbergen 942bad8471SEric Van Hensbergen /** 952bad8471SEric Van Hensbergen * p9mode2unixmode- convert plan9 mode bits to unix mode bits 962bad8471SEric Van Hensbergen * @v9ses: v9fs session information 972bad8471SEric Van Hensbergen * @mode: mode to convert 982bad8471SEric Van Hensbergen * 992bad8471SEric Van Hensbergen */ 1002bad8471SEric Van Hensbergen 10173c592b9SEric Van Hensbergen static int p9mode2unixmode(struct v9fs_session_info *v9ses, int mode) 1022bad8471SEric Van Hensbergen { 1032bad8471SEric Van Hensbergen int res; 1042bad8471SEric Van Hensbergen 1052bad8471SEric Van Hensbergen res = mode & 0777; 1062bad8471SEric Van Hensbergen 107bd238fb4SLatchesar Ionkov if ((mode & P9_DMDIR) == P9_DMDIR) 1082bad8471SEric Van Hensbergen res |= S_IFDIR; 109dd6102fbSSripathi Kodi else if ((mode & P9_DMSYMLINK) && (v9fs_proto_dotu(v9ses))) 1102bad8471SEric Van Hensbergen res |= S_IFLNK; 111dd6102fbSSripathi Kodi else if ((mode & P9_DMSOCKET) && (v9fs_proto_dotu(v9ses)) 1122bad8471SEric Van Hensbergen && (v9ses->nodev == 0)) 1132bad8471SEric Van Hensbergen res |= S_IFSOCK; 114dd6102fbSSripathi Kodi else if ((mode & P9_DMNAMEDPIPE) && (v9fs_proto_dotu(v9ses)) 1152bad8471SEric Van Hensbergen && (v9ses->nodev == 0)) 1162bad8471SEric Van Hensbergen res |= S_IFIFO; 117dd6102fbSSripathi Kodi else if ((mode & P9_DMDEVICE) && (v9fs_proto_dotu(v9ses)) 1182bad8471SEric Van Hensbergen && (v9ses->nodev == 0)) 1192bad8471SEric Van Hensbergen res |= S_IFBLK; 1202bad8471SEric Van Hensbergen else 1212bad8471SEric Van Hensbergen res |= S_IFREG; 1222bad8471SEric Van Hensbergen 123dd6102fbSSripathi Kodi if (v9fs_proto_dotu(v9ses)) { 124bd238fb4SLatchesar Ionkov if ((mode & P9_DMSETUID) == P9_DMSETUID) 1252bad8471SEric Van Hensbergen res |= S_ISUID; 1262bad8471SEric Van Hensbergen 127bd238fb4SLatchesar Ionkov if ((mode & P9_DMSETGID) == P9_DMSETGID) 1282bad8471SEric Van Hensbergen res |= S_ISGID; 129d199d652SAnthony Liguori 130d199d652SAnthony Liguori if ((mode & P9_DMSETVTX) == P9_DMSETVTX) 131d199d652SAnthony Liguori res |= S_ISVTX; 1322bad8471SEric Van Hensbergen } 1332bad8471SEric Van Hensbergen 1342bad8471SEric Van Hensbergen return res; 1352bad8471SEric Van Hensbergen } 1362bad8471SEric Van Hensbergen 137ee443996SEric Van Hensbergen /** 138ee443996SEric Van Hensbergen * v9fs_uflags2omode- convert posix open flags to plan 9 mode bits 139ee443996SEric Van Hensbergen * @uflags: flags to convert 1402e4bef41SEric Van Hensbergen * @extended: if .u extensions are active 141ee443996SEric Van Hensbergen */ 142ee443996SEric Van Hensbergen 1432e4bef41SEric Van Hensbergen int v9fs_uflags2omode(int uflags, int extended) 1446a3124a3SLatchesar Ionkov { 1456a3124a3SLatchesar Ionkov int ret; 1466a3124a3SLatchesar Ionkov 1476a3124a3SLatchesar Ionkov ret = 0; 1486a3124a3SLatchesar Ionkov switch (uflags&3) { 1496a3124a3SLatchesar Ionkov default: 1506a3124a3SLatchesar Ionkov case O_RDONLY: 151bd238fb4SLatchesar Ionkov ret = P9_OREAD; 1526a3124a3SLatchesar Ionkov break; 1536a3124a3SLatchesar Ionkov 1546a3124a3SLatchesar Ionkov case O_WRONLY: 155bd238fb4SLatchesar Ionkov ret = P9_OWRITE; 1566a3124a3SLatchesar Ionkov break; 1576a3124a3SLatchesar Ionkov 1586a3124a3SLatchesar Ionkov case O_RDWR: 159bd238fb4SLatchesar Ionkov ret = P9_ORDWR; 1606a3124a3SLatchesar Ionkov break; 1616a3124a3SLatchesar Ionkov } 1626a3124a3SLatchesar Ionkov 1636a3124a3SLatchesar Ionkov if (uflags & O_TRUNC) 164bd238fb4SLatchesar Ionkov ret |= P9_OTRUNC; 1656a3124a3SLatchesar Ionkov 1662e4bef41SEric Van Hensbergen if (extended) { 1672e4bef41SEric Van Hensbergen if (uflags & O_EXCL) 1682e4bef41SEric Van Hensbergen ret |= P9_OEXCL; 1692e4bef41SEric Van Hensbergen 1706a3124a3SLatchesar Ionkov if (uflags & O_APPEND) 171bd238fb4SLatchesar Ionkov ret |= P9_OAPPEND; 1722e4bef41SEric Van Hensbergen } 1736a3124a3SLatchesar Ionkov 1746a3124a3SLatchesar Ionkov return ret; 1756a3124a3SLatchesar Ionkov } 1766a3124a3SLatchesar Ionkov 1772bad8471SEric Van Hensbergen /** 178531b1094SLatchesar Ionkov * v9fs_blank_wstat - helper function to setup a 9P stat structure 179531b1094SLatchesar Ionkov * @wstat: structure to initialize 1802bad8471SEric Van Hensbergen * 1812bad8471SEric Van Hensbergen */ 1822bad8471SEric Van Hensbergen 1837a4439c4SM. Mohan Kumar void 184bd238fb4SLatchesar Ionkov v9fs_blank_wstat(struct p9_wstat *wstat) 1852bad8471SEric Van Hensbergen { 186531b1094SLatchesar Ionkov wstat->type = ~0; 187531b1094SLatchesar Ionkov wstat->dev = ~0; 188531b1094SLatchesar Ionkov wstat->qid.type = ~0; 189531b1094SLatchesar Ionkov wstat->qid.version = ~0; 190531b1094SLatchesar Ionkov *((long long *)&wstat->qid.path) = ~0; 191531b1094SLatchesar Ionkov wstat->mode = ~0; 192531b1094SLatchesar Ionkov wstat->atime = ~0; 193531b1094SLatchesar Ionkov wstat->mtime = ~0; 194531b1094SLatchesar Ionkov wstat->length = ~0; 195531b1094SLatchesar Ionkov wstat->name = NULL; 196531b1094SLatchesar Ionkov wstat->uid = NULL; 197531b1094SLatchesar Ionkov wstat->gid = NULL; 198531b1094SLatchesar Ionkov wstat->muid = NULL; 199531b1094SLatchesar Ionkov wstat->n_uid = ~0; 200531b1094SLatchesar Ionkov wstat->n_gid = ~0; 201531b1094SLatchesar Ionkov wstat->n_muid = ~0; 202531b1094SLatchesar Ionkov wstat->extension = NULL; 2032bad8471SEric Van Hensbergen } 2042bad8471SEric Van Hensbergen 20560e78d2cSAbhishek Kulkarni #ifdef CONFIG_9P_FSCACHE 20660e78d2cSAbhishek Kulkarni /** 20760e78d2cSAbhishek Kulkarni * v9fs_alloc_inode - helper function to allocate an inode 20860e78d2cSAbhishek Kulkarni * This callback is executed before setting up the inode so that we 20960e78d2cSAbhishek Kulkarni * can associate a vcookie with each inode. 21060e78d2cSAbhishek Kulkarni * 21160e78d2cSAbhishek Kulkarni */ 21260e78d2cSAbhishek Kulkarni 21360e78d2cSAbhishek Kulkarni struct inode *v9fs_alloc_inode(struct super_block *sb) 21460e78d2cSAbhishek Kulkarni { 21560e78d2cSAbhishek Kulkarni struct v9fs_cookie *vcookie; 21660e78d2cSAbhishek Kulkarni vcookie = (struct v9fs_cookie *)kmem_cache_alloc(vcookie_cache, 21760e78d2cSAbhishek Kulkarni GFP_KERNEL); 21860e78d2cSAbhishek Kulkarni if (!vcookie) 21960e78d2cSAbhishek Kulkarni return NULL; 22060e78d2cSAbhishek Kulkarni 22160e78d2cSAbhishek Kulkarni vcookie->fscache = NULL; 22260e78d2cSAbhishek Kulkarni vcookie->qid = NULL; 22360e78d2cSAbhishek Kulkarni spin_lock_init(&vcookie->lock); 22460e78d2cSAbhishek Kulkarni return &vcookie->inode; 22560e78d2cSAbhishek Kulkarni } 22660e78d2cSAbhishek Kulkarni 22760e78d2cSAbhishek Kulkarni /** 22860e78d2cSAbhishek Kulkarni * v9fs_destroy_inode - destroy an inode 22960e78d2cSAbhishek Kulkarni * 23060e78d2cSAbhishek Kulkarni */ 23160e78d2cSAbhishek Kulkarni 23260e78d2cSAbhishek Kulkarni void v9fs_destroy_inode(struct inode *inode) 23360e78d2cSAbhishek Kulkarni { 23460e78d2cSAbhishek Kulkarni kmem_cache_free(vcookie_cache, v9fs_inode2cookie(inode)); 23560e78d2cSAbhishek Kulkarni } 23660e78d2cSAbhishek Kulkarni #endif 23760e78d2cSAbhishek Kulkarni 2382bad8471SEric Van Hensbergen /** 23909d34ee5SEric Van Hensbergen * v9fs_get_fsgid_for_create - Helper function to get the gid for creating a 24009d34ee5SEric Van Hensbergen * new file system object. This checks the S_ISGID to determine the owning 24109d34ee5SEric Van Hensbergen * group of the new file system object. 24209d34ee5SEric Van Hensbergen */ 24309d34ee5SEric Van Hensbergen 24409d34ee5SEric Van Hensbergen static gid_t v9fs_get_fsgid_for_create(struct inode *dir_inode) 24509d34ee5SEric Van Hensbergen { 24609d34ee5SEric Van Hensbergen BUG_ON(dir_inode == NULL); 24709d34ee5SEric Van Hensbergen 24809d34ee5SEric Van Hensbergen if (dir_inode->i_mode & S_ISGID) { 24909d34ee5SEric Van Hensbergen /* set_gid bit is set.*/ 25009d34ee5SEric Van Hensbergen return dir_inode->i_gid; 25109d34ee5SEric Van Hensbergen } 25209d34ee5SEric Van Hensbergen return current_fsgid(); 25309d34ee5SEric Van Hensbergen } 25409d34ee5SEric Van Hensbergen 25509d34ee5SEric Van Hensbergen /** 25609d34ee5SEric Van Hensbergen * v9fs_dentry_from_dir_inode - helper function to get the dentry from 25709d34ee5SEric Van Hensbergen * dir inode. 25809d34ee5SEric Van Hensbergen * 25909d34ee5SEric Van Hensbergen */ 26009d34ee5SEric Van Hensbergen 26109d34ee5SEric Van Hensbergen struct dentry *v9fs_dentry_from_dir_inode(struct inode *inode) 26209d34ee5SEric Van Hensbergen { 26309d34ee5SEric Van Hensbergen struct dentry *dentry; 26409d34ee5SEric Van Hensbergen 26509d34ee5SEric Van Hensbergen spin_lock(&dcache_lock); 26609d34ee5SEric Van Hensbergen /* Directory should have only one entry. */ 26709d34ee5SEric Van Hensbergen BUG_ON(S_ISDIR(inode->i_mode) && !list_is_singular(&inode->i_dentry)); 26809d34ee5SEric Van Hensbergen dentry = list_entry(inode->i_dentry.next, struct dentry, d_alias); 26909d34ee5SEric Van Hensbergen spin_unlock(&dcache_lock); 27009d34ee5SEric Van Hensbergen return dentry; 27109d34ee5SEric Van Hensbergen } 27209d34ee5SEric Van Hensbergen 27309d34ee5SEric Van Hensbergen /** 2742bad8471SEric Van Hensbergen * v9fs_get_inode - helper function to setup an inode 2752bad8471SEric Van Hensbergen * @sb: superblock 2762bad8471SEric Van Hensbergen * @mode: mode to setup inode with 2772bad8471SEric Van Hensbergen * 2782bad8471SEric Van Hensbergen */ 2792bad8471SEric Van Hensbergen 2802bad8471SEric Van Hensbergen struct inode *v9fs_get_inode(struct super_block *sb, int mode) 2812bad8471SEric Van Hensbergen { 2822bb54115SAbhishek Kulkarni int err; 2836a3124a3SLatchesar Ionkov struct inode *inode; 284b501611aSEric Van Hensbergen struct v9fs_session_info *v9ses = sb->s_fs_info; 2852bad8471SEric Van Hensbergen 286bd238fb4SLatchesar Ionkov P9_DPRINTK(P9_DEBUG_VFS, "super block: %p mode: %o\n", sb, mode); 2872bad8471SEric Van Hensbergen 2882bad8471SEric Van Hensbergen inode = new_inode(sb); 2892bb54115SAbhishek Kulkarni if (!inode) { 2902bb54115SAbhishek Kulkarni P9_EPRINTK(KERN_WARNING, "Problem allocating inode\n"); 29148559b4cSAbhishek Kulkarni return ERR_PTR(-ENOMEM); 2922bb54115SAbhishek Kulkarni } 2932bb54115SAbhishek Kulkarni 294217f206dSDmitry Monakhov inode_init_owner(inode, NULL, mode); 2952bad8471SEric Van Hensbergen inode->i_blocks = 0; 2962bad8471SEric Van Hensbergen inode->i_rdev = 0; 2972bad8471SEric Van Hensbergen inode->i_atime = inode->i_mtime = inode->i_ctime = CURRENT_TIME; 298147b31cfSEric Van Hensbergen inode->i_mapping->a_ops = &v9fs_addr_operations; 2992bad8471SEric Van Hensbergen 3002bad8471SEric Van Hensbergen switch (mode & S_IFMT) { 3012bad8471SEric Van Hensbergen case S_IFIFO: 3022bad8471SEric Van Hensbergen case S_IFBLK: 3032bad8471SEric Van Hensbergen case S_IFCHR: 3042bad8471SEric Van Hensbergen case S_IFSOCK: 305dd6102fbSSripathi Kodi if (!v9fs_proto_dotu(v9ses)) { 306bd238fb4SLatchesar Ionkov P9_DPRINTK(P9_DEBUG_ERROR, 307bd238fb4SLatchesar Ionkov "special files without extended mode\n"); 3082bb54115SAbhishek Kulkarni err = -EINVAL; 3092bb54115SAbhishek Kulkarni goto error; 310b501611aSEric Van Hensbergen } 3112bb54115SAbhishek Kulkarni init_special_inode(inode, inode->i_mode, inode->i_rdev); 3125d58bec5SEric Van Hensbergen break; 3132bad8471SEric Van Hensbergen case S_IFREG: 3149b6533c9SSripathi Kodi if (v9fs_proto_dotl(v9ses)) { 3159b6533c9SSripathi Kodi inode->i_op = &v9fs_file_inode_operations_dotl; 3169b6533c9SSripathi Kodi inode->i_fop = &v9fs_file_operations_dotl; 3179b6533c9SSripathi Kodi } else { 3182bad8471SEric Van Hensbergen inode->i_op = &v9fs_file_inode_operations; 3192bad8471SEric Van Hensbergen inode->i_fop = &v9fs_file_operations; 3209b6533c9SSripathi Kodi } 3219b6533c9SSripathi Kodi 3222bad8471SEric Van Hensbergen break; 3239b6533c9SSripathi Kodi 324b501611aSEric Van Hensbergen case S_IFLNK: 3259b6533c9SSripathi Kodi if (!v9fs_proto_dotu(v9ses) && !v9fs_proto_dotl(v9ses)) { 3269b6533c9SSripathi Kodi P9_DPRINTK(P9_DEBUG_ERROR, "extended modes used with " 3279b6533c9SSripathi Kodi "legacy protocol.\n"); 3282bb54115SAbhishek Kulkarni err = -EINVAL; 3292bb54115SAbhishek Kulkarni goto error; 330b501611aSEric Van Hensbergen } 3319b6533c9SSripathi Kodi 3329b6533c9SSripathi Kodi if (v9fs_proto_dotl(v9ses)) 3339b6533c9SSripathi Kodi inode->i_op = &v9fs_symlink_inode_operations_dotl; 3349b6533c9SSripathi Kodi else 335b501611aSEric Van Hensbergen inode->i_op = &v9fs_symlink_inode_operations; 3369b6533c9SSripathi Kodi 337b501611aSEric Van Hensbergen break; 3382bad8471SEric Van Hensbergen case S_IFDIR: 339d8c76e6fSDave Hansen inc_nlink(inode); 3409b6533c9SSripathi Kodi if (v9fs_proto_dotl(v9ses)) 3419b6533c9SSripathi Kodi inode->i_op = &v9fs_dir_inode_operations_dotl; 3429b6533c9SSripathi Kodi else if (v9fs_proto_dotu(v9ses)) 3439b6533c9SSripathi Kodi inode->i_op = &v9fs_dir_inode_operations_dotu; 344b501611aSEric Van Hensbergen else 3452bad8471SEric Van Hensbergen inode->i_op = &v9fs_dir_inode_operations; 3469b6533c9SSripathi Kodi 3479b6533c9SSripathi Kodi if (v9fs_proto_dotl(v9ses)) 3489b6533c9SSripathi Kodi inode->i_fop = &v9fs_dir_operations_dotl; 3499b6533c9SSripathi Kodi else 3502bad8471SEric Van Hensbergen inode->i_fop = &v9fs_dir_operations; 3519b6533c9SSripathi Kodi 3522bad8471SEric Van Hensbergen break; 3532bad8471SEric Van Hensbergen default: 3542bb54115SAbhishek Kulkarni P9_DPRINTK(P9_DEBUG_ERROR, "BAD mode 0x%x S_IFMT 0x%x\n", 3552bad8471SEric Van Hensbergen mode, mode & S_IFMT); 3562bb54115SAbhishek Kulkarni err = -EINVAL; 3572bb54115SAbhishek Kulkarni goto error; 3582bad8471SEric Van Hensbergen } 3592bb54115SAbhishek Kulkarni 3602bad8471SEric Van Hensbergen return inode; 3612bb54115SAbhishek Kulkarni 3622bb54115SAbhishek Kulkarni error: 3632bb54115SAbhishek Kulkarni iput(inode); 3642bb54115SAbhishek Kulkarni return ERR_PTR(err); 3652bad8471SEric Van Hensbergen } 3662bad8471SEric Van Hensbergen 367bd238fb4SLatchesar Ionkov /* 3686a3124a3SLatchesar Ionkov static struct v9fs_fid* 3696a3124a3SLatchesar Ionkov v9fs_clone_walk(struct v9fs_session_info *v9ses, u32 fid, struct dentry *dentry) 3706a3124a3SLatchesar Ionkov { 3716a3124a3SLatchesar Ionkov int err; 372736c4b85SMika Kukkonen int nfid; 3736a3124a3SLatchesar Ionkov struct v9fs_fid *ret; 3746a3124a3SLatchesar Ionkov struct v9fs_fcall *fcall; 3750b8dd177SLatchesar Ionkov 3766a3124a3SLatchesar Ionkov nfid = v9fs_get_idpool(&v9ses->fidpool); 3776a3124a3SLatchesar Ionkov if (nfid < 0) { 3780b8dd177SLatchesar Ionkov eprintk(KERN_WARNING, "no free fids available\n"); 379731805b4SLatchesar Ionkov return ERR_PTR(-ENOSPC); 3800b8dd177SLatchesar Ionkov } 3810b8dd177SLatchesar Ionkov 3826a3124a3SLatchesar Ionkov err = v9fs_t_walk(v9ses, fid, nfid, (char *) dentry->d_name.name, 3836a3124a3SLatchesar Ionkov &fcall); 3846a3124a3SLatchesar Ionkov 3856a3124a3SLatchesar Ionkov if (err < 0) { 38641e5a6acSLatchesar Ionkov if (fcall && fcall->id == RWALK) 38741e5a6acSLatchesar Ionkov goto clunk_fid; 38841e5a6acSLatchesar Ionkov 3896a3124a3SLatchesar Ionkov PRINT_FCALL_ERROR("walk error", fcall); 3906a3124a3SLatchesar Ionkov v9fs_put_idpool(nfid, &v9ses->fidpool); 3916a3124a3SLatchesar Ionkov goto error; 3920b8dd177SLatchesar Ionkov } 3936a3124a3SLatchesar Ionkov 3943cf6429aSLatchesar Ionkov kfree(fcall); 3953cf6429aSLatchesar Ionkov fcall = NULL; 3966a3124a3SLatchesar Ionkov ret = v9fs_fid_create(v9ses, nfid); 3976a3124a3SLatchesar Ionkov if (!ret) { 3986a3124a3SLatchesar Ionkov err = -ENOMEM; 3996a3124a3SLatchesar Ionkov goto clunk_fid; 4000b8dd177SLatchesar Ionkov } 4012bad8471SEric Van Hensbergen 4026a3124a3SLatchesar Ionkov err = v9fs_fid_insert(ret, dentry); 4036a3124a3SLatchesar Ionkov if (err < 0) { 4046a3124a3SLatchesar Ionkov v9fs_fid_destroy(ret); 4056a3124a3SLatchesar Ionkov goto clunk_fid; 4066a3124a3SLatchesar Ionkov } 4072bad8471SEric Van Hensbergen 4086a3124a3SLatchesar Ionkov return ret; 4096a3124a3SLatchesar Ionkov 4106a3124a3SLatchesar Ionkov clunk_fid: 4116a3124a3SLatchesar Ionkov v9fs_t_clunk(v9ses, nfid); 4126a3124a3SLatchesar Ionkov 4136a3124a3SLatchesar Ionkov error: 4146a3124a3SLatchesar Ionkov kfree(fcall); 4156a3124a3SLatchesar Ionkov return ERR_PTR(err); 4166a3124a3SLatchesar Ionkov } 417bd238fb4SLatchesar Ionkov */ 4186a3124a3SLatchesar Ionkov 41960e78d2cSAbhishek Kulkarni 42060e78d2cSAbhishek Kulkarni /** 42160e78d2cSAbhishek Kulkarni * v9fs_clear_inode - release an inode 42260e78d2cSAbhishek Kulkarni * @inode: inode to release 42360e78d2cSAbhishek Kulkarni * 42460e78d2cSAbhishek Kulkarni */ 42560e78d2cSAbhishek Kulkarni void v9fs_clear_inode(struct inode *inode) 42660e78d2cSAbhishek Kulkarni { 42760e78d2cSAbhishek Kulkarni filemap_fdatawrite(inode->i_mapping); 42860e78d2cSAbhishek Kulkarni 42960e78d2cSAbhishek Kulkarni #ifdef CONFIG_9P_FSCACHE 43060e78d2cSAbhishek Kulkarni v9fs_cache_inode_put_cookie(inode); 43160e78d2cSAbhishek Kulkarni #endif 43260e78d2cSAbhishek Kulkarni } 43360e78d2cSAbhishek Kulkarni 4345174fdabSLatchesar Ionkov static struct inode * 435f0853122SSripathi Kodi v9fs_inode(struct v9fs_session_info *v9ses, struct p9_fid *fid, 4366a3124a3SLatchesar Ionkov struct super_block *sb) 4376a3124a3SLatchesar Ionkov { 4386a3124a3SLatchesar Ionkov int err, umode; 439f0853122SSripathi Kodi struct inode *ret = NULL; 44051a87c55SEric Van Hensbergen struct p9_wstat *st; 4416a3124a3SLatchesar Ionkov 442bd238fb4SLatchesar Ionkov st = p9_client_stat(fid); 44302bc3567SAbhishek Kulkarni if (IS_ERR(st)) 44402bc3567SAbhishek Kulkarni return ERR_CAST(st); 4452bad8471SEric Van Hensbergen 446bd238fb4SLatchesar Ionkov umode = p9mode2unixmode(v9ses, st->mode); 4476a3124a3SLatchesar Ionkov ret = v9fs_get_inode(sb, umode); 4486a3124a3SLatchesar Ionkov if (IS_ERR(ret)) { 4496a3124a3SLatchesar Ionkov err = PTR_ERR(ret); 4506a3124a3SLatchesar Ionkov goto error; 4512bad8471SEric Van Hensbergen } 4522bad8471SEric Van Hensbergen 453bd238fb4SLatchesar Ionkov v9fs_stat2inode(st, ret, sb); 454bd238fb4SLatchesar Ionkov ret->i_ino = v9fs_qid2ino(&st->qid); 45560e78d2cSAbhishek Kulkarni 45660e78d2cSAbhishek Kulkarni #ifdef CONFIG_9P_FSCACHE 45760e78d2cSAbhishek Kulkarni v9fs_vcookie_set_qid(ret, &st->qid); 45860e78d2cSAbhishek Kulkarni v9fs_cache_inode_get_cookie(ret); 45960e78d2cSAbhishek Kulkarni #endif 46002bc3567SAbhishek Kulkarni p9stat_free(st); 461bd238fb4SLatchesar Ionkov kfree(st); 4626a3124a3SLatchesar Ionkov return ret; 4636a3124a3SLatchesar Ionkov error: 46402bc3567SAbhishek Kulkarni p9stat_free(st); 465bd238fb4SLatchesar Ionkov kfree(st); 4666a3124a3SLatchesar Ionkov return ERR_PTR(err); 4672bad8471SEric Van Hensbergen } 4682bad8471SEric Van Hensbergen 469f0853122SSripathi Kodi static struct inode * 470f0853122SSripathi Kodi v9fs_inode_dotl(struct v9fs_session_info *v9ses, struct p9_fid *fid, 471f0853122SSripathi Kodi struct super_block *sb) 472f0853122SSripathi Kodi { 473f0853122SSripathi Kodi struct inode *ret = NULL; 474f0853122SSripathi Kodi int err; 475f0853122SSripathi Kodi struct p9_stat_dotl *st; 476f0853122SSripathi Kodi 477f0853122SSripathi Kodi st = p9_client_getattr_dotl(fid, P9_STATS_BASIC); 478f0853122SSripathi Kodi if (IS_ERR(st)) 479f0853122SSripathi Kodi return ERR_CAST(st); 480f0853122SSripathi Kodi 481f0853122SSripathi Kodi ret = v9fs_get_inode(sb, st->st_mode); 482f0853122SSripathi Kodi if (IS_ERR(ret)) { 483f0853122SSripathi Kodi err = PTR_ERR(ret); 484f0853122SSripathi Kodi goto error; 485f0853122SSripathi Kodi } 486f0853122SSripathi Kodi 487f0853122SSripathi Kodi v9fs_stat2inode_dotl(st, ret); 488f0853122SSripathi Kodi ret->i_ino = v9fs_qid2ino(&st->qid); 489f0853122SSripathi Kodi #ifdef CONFIG_9P_FSCACHE 490f0853122SSripathi Kodi v9fs_vcookie_set_qid(ret, &st->qid); 491f0853122SSripathi Kodi v9fs_cache_inode_get_cookie(ret); 492f0853122SSripathi Kodi #endif 493f0853122SSripathi Kodi kfree(st); 494f0853122SSripathi Kodi return ret; 495f0853122SSripathi Kodi error: 496f0853122SSripathi Kodi kfree(st); 497f0853122SSripathi Kodi return ERR_PTR(err); 498f0853122SSripathi Kodi } 499f0853122SSripathi Kodi 500f0853122SSripathi Kodi /** 501f0853122SSripathi Kodi * v9fs_inode_from_fid - Helper routine to populate an inode by 502f0853122SSripathi Kodi * issuing a attribute request 503f0853122SSripathi Kodi * @v9ses: session information 504f0853122SSripathi Kodi * @fid: fid to issue attribute request for 505f0853122SSripathi Kodi * @sb: superblock on which to create inode 506f0853122SSripathi Kodi * 507f0853122SSripathi Kodi */ 508f0853122SSripathi Kodi static inline struct inode * 509f0853122SSripathi Kodi v9fs_inode_from_fid(struct v9fs_session_info *v9ses, struct p9_fid *fid, 510f0853122SSripathi Kodi struct super_block *sb) 511f0853122SSripathi Kodi { 512f0853122SSripathi Kodi if (v9fs_proto_dotl(v9ses)) 513f0853122SSripathi Kodi return v9fs_inode_dotl(v9ses, fid, sb); 514f0853122SSripathi Kodi else 515f0853122SSripathi Kodi return v9fs_inode(v9ses, fid, sb); 516f0853122SSripathi Kodi } 517f0853122SSripathi Kodi 5182bad8471SEric Van Hensbergen /** 5192bad8471SEric Van Hensbergen * v9fs_remove - helper function to remove files and directories 52073c592b9SEric Van Hensbergen * @dir: directory inode that is being deleted 52173c592b9SEric Van Hensbergen * @file: dentry that is being deleted 52273c592b9SEric Van Hensbergen * @rmdir: removing a directory 5232bad8471SEric Van Hensbergen * 5242bad8471SEric Van Hensbergen */ 5252bad8471SEric Van Hensbergen 5262bad8471SEric Van Hensbergen static int v9fs_remove(struct inode *dir, struct dentry *file, int rmdir) 5272bad8471SEric Van Hensbergen { 528d994f405SAneesh Kumar K.V int retval; 529bd238fb4SLatchesar Ionkov struct inode *file_inode; 530bd238fb4SLatchesar Ionkov struct p9_fid *v9fid; 5312bad8471SEric Van Hensbergen 532bd238fb4SLatchesar Ionkov P9_DPRINTK(P9_DEBUG_VFS, "inode: %p dentry: %p rmdir: %d\n", dir, file, 5332bad8471SEric Van Hensbergen rmdir); 5342bad8471SEric Van Hensbergen 5352bad8471SEric Van Hensbergen file_inode = file->d_inode; 536c959df9fSLatchesar Ionkov v9fid = v9fs_fid_clone(file); 537da977b2cSEric Van Hensbergen if (IS_ERR(v9fid)) 538da977b2cSEric Van Hensbergen return PTR_ERR(v9fid); 5392bad8471SEric Van Hensbergen 540d994f405SAneesh Kumar K.V retval = p9_client_remove(v9fid); 541d994f405SAneesh Kumar K.V if (!retval) 542d994f405SAneesh Kumar K.V drop_nlink(file_inode); 543d994f405SAneesh Kumar K.V return retval; 5442bad8471SEric Van Hensbergen } 5452bad8471SEric Van Hensbergen 5466a3124a3SLatchesar Ionkov static int 5476a3124a3SLatchesar Ionkov v9fs_open_created(struct inode *inode, struct file *file) 5486a3124a3SLatchesar Ionkov { 5496a3124a3SLatchesar Ionkov return 0; 5506a3124a3SLatchesar Ionkov } 5516a3124a3SLatchesar Ionkov 552bd238fb4SLatchesar Ionkov 553bd238fb4SLatchesar Ionkov /** 554bd238fb4SLatchesar Ionkov * v9fs_create - Create a file 555ee443996SEric Van Hensbergen * @v9ses: session information 556ee443996SEric Van Hensbergen * @dir: directory that dentry is being created in 557bd238fb4SLatchesar Ionkov * @dentry: dentry that is being created 5580e15597eSAbhishek Kulkarni * @extension: 9p2000.u extension string to support devices, etc. 559bd238fb4SLatchesar Ionkov * @perm: create permissions 560bd238fb4SLatchesar Ionkov * @mode: open mode 561bd238fb4SLatchesar Ionkov * 562bd238fb4SLatchesar Ionkov */ 563bd238fb4SLatchesar Ionkov static struct p9_fid * 564bd238fb4SLatchesar Ionkov v9fs_create(struct v9fs_session_info *v9ses, struct inode *dir, 565bd238fb4SLatchesar Ionkov struct dentry *dentry, char *extension, u32 perm, u8 mode) 566bd238fb4SLatchesar Ionkov { 567bd238fb4SLatchesar Ionkov int err; 568bd238fb4SLatchesar Ionkov char *name; 569bd238fb4SLatchesar Ionkov struct p9_fid *dfid, *ofid, *fid; 570bd238fb4SLatchesar Ionkov struct inode *inode; 571bd238fb4SLatchesar Ionkov 57251a87c55SEric Van Hensbergen P9_DPRINTK(P9_DEBUG_VFS, "name %s\n", dentry->d_name.name); 57351a87c55SEric Van Hensbergen 574bd238fb4SLatchesar Ionkov err = 0; 575bd238fb4SLatchesar Ionkov ofid = NULL; 576bd238fb4SLatchesar Ionkov fid = NULL; 577bd238fb4SLatchesar Ionkov name = (char *) dentry->d_name.name; 5786d27e64dSVenkateswararao Jujjuri dfid = v9fs_fid_lookup(dentry->d_parent); 579bd238fb4SLatchesar Ionkov if (IS_ERR(dfid)) { 580bd238fb4SLatchesar Ionkov err = PTR_ERR(dfid); 5816d27e64dSVenkateswararao Jujjuri P9_DPRINTK(P9_DEBUG_VFS, "fid lookup failed %d\n", err); 5826d27e64dSVenkateswararao Jujjuri return ERR_PTR(err); 583bd238fb4SLatchesar Ionkov } 584bd238fb4SLatchesar Ionkov 585bd238fb4SLatchesar Ionkov /* clone a fid to use for creation */ 586bd238fb4SLatchesar Ionkov ofid = p9_client_walk(dfid, 0, NULL, 1); 587bd238fb4SLatchesar Ionkov if (IS_ERR(ofid)) { 588bd238fb4SLatchesar Ionkov err = PTR_ERR(ofid); 58951a87c55SEric Van Hensbergen P9_DPRINTK(P9_DEBUG_VFS, "p9_client_walk failed %d\n", err); 5906d27e64dSVenkateswararao Jujjuri return ERR_PTR(err); 591bd238fb4SLatchesar Ionkov } 592bd238fb4SLatchesar Ionkov 593bd238fb4SLatchesar Ionkov err = p9_client_fcreate(ofid, name, perm, mode, extension); 59451a87c55SEric Van Hensbergen if (err < 0) { 59551a87c55SEric Van Hensbergen P9_DPRINTK(P9_DEBUG_VFS, "p9_client_fcreate failed %d\n", err); 596bd238fb4SLatchesar Ionkov goto error; 59751a87c55SEric Van Hensbergen } 598bd238fb4SLatchesar Ionkov 599bd238fb4SLatchesar Ionkov /* now walk from the parent so we can get unopened fid */ 6006d27e64dSVenkateswararao Jujjuri fid = p9_client_walk(dfid, 1, &name, 1); 601bd238fb4SLatchesar Ionkov if (IS_ERR(fid)) { 602bd238fb4SLatchesar Ionkov err = PTR_ERR(fid); 60351a87c55SEric Van Hensbergen P9_DPRINTK(P9_DEBUG_VFS, "p9_client_walk failed %d\n", err); 604bd238fb4SLatchesar Ionkov fid = NULL; 605bd238fb4SLatchesar Ionkov goto error; 6066d27e64dSVenkateswararao Jujjuri } 607bd238fb4SLatchesar Ionkov 608bd238fb4SLatchesar Ionkov /* instantiate inode and assign the unopened fid to the dentry */ 609bd238fb4SLatchesar Ionkov inode = v9fs_inode_from_fid(v9ses, fid, dir->i_sb); 610bd238fb4SLatchesar Ionkov if (IS_ERR(inode)) { 611bd238fb4SLatchesar Ionkov err = PTR_ERR(inode); 61251a87c55SEric Van Hensbergen P9_DPRINTK(P9_DEBUG_VFS, "inode creation failed %d\n", err); 613bd238fb4SLatchesar Ionkov goto error; 614bd238fb4SLatchesar Ionkov } 615bd238fb4SLatchesar Ionkov 616bd238fb4SLatchesar Ionkov if (v9ses->cache) 617bd238fb4SLatchesar Ionkov dentry->d_op = &v9fs_cached_dentry_operations; 618bd238fb4SLatchesar Ionkov else 619bd238fb4SLatchesar Ionkov dentry->d_op = &v9fs_dentry_operations; 620bd238fb4SLatchesar Ionkov 621bd238fb4SLatchesar Ionkov d_instantiate(dentry, inode); 62250fb6d2bSAbhishek Kulkarni err = v9fs_fid_add(dentry, fid); 62350fb6d2bSAbhishek Kulkarni if (err < 0) 62450fb6d2bSAbhishek Kulkarni goto error; 62550fb6d2bSAbhishek Kulkarni 626bd238fb4SLatchesar Ionkov return ofid; 627bd238fb4SLatchesar Ionkov 628bd238fb4SLatchesar Ionkov error: 629bd238fb4SLatchesar Ionkov if (ofid) 630bd238fb4SLatchesar Ionkov p9_client_clunk(ofid); 631bd238fb4SLatchesar Ionkov 632bd238fb4SLatchesar Ionkov if (fid) 633bd238fb4SLatchesar Ionkov p9_client_clunk(fid); 634bd238fb4SLatchesar Ionkov 635bd238fb4SLatchesar Ionkov return ERR_PTR(err); 636bd238fb4SLatchesar Ionkov } 637bd238fb4SLatchesar Ionkov 6382bad8471SEric Van Hensbergen /** 6392bad8471SEric Van Hensbergen * v9fs_vfs_create - VFS hook to create files 640ee443996SEric Van Hensbergen * @dir: directory inode that is being created 6412bad8471SEric Van Hensbergen * @dentry: dentry that is being deleted 6426a3124a3SLatchesar Ionkov * @mode: create permissions 6432bad8471SEric Van Hensbergen * @nd: path information 6442bad8471SEric Van Hensbergen * 6452bad8471SEric Van Hensbergen */ 6462bad8471SEric Van Hensbergen 6472bad8471SEric Van Hensbergen static int 6486a3124a3SLatchesar Ionkov v9fs_vfs_create(struct inode *dir, struct dentry *dentry, int mode, 6492bad8471SEric Van Hensbergen struct nameidata *nd) 6502bad8471SEric Van Hensbergen { 6516a3124a3SLatchesar Ionkov int err; 652bd238fb4SLatchesar Ionkov u32 perm; 6536a3124a3SLatchesar Ionkov int flags; 6546a3124a3SLatchesar Ionkov struct v9fs_session_info *v9ses; 655bd238fb4SLatchesar Ionkov struct p9_fid *fid; 6566a3124a3SLatchesar Ionkov struct file *filp; 6576a3124a3SLatchesar Ionkov 658bd238fb4SLatchesar Ionkov err = 0; 659bd238fb4SLatchesar Ionkov fid = NULL; 6606a3124a3SLatchesar Ionkov v9ses = v9fs_inode2v9ses(dir); 661da977b2cSEric Van Hensbergen perm = unixmode2p9mode(v9ses, mode); 6626a3124a3SLatchesar Ionkov if (nd && nd->flags & LOOKUP_OPEN) 6636a3124a3SLatchesar Ionkov flags = nd->intent.open.flags - 1; 6646a3124a3SLatchesar Ionkov else 6656a3124a3SLatchesar Ionkov flags = O_RDWR; 6666a3124a3SLatchesar Ionkov 667bd238fb4SLatchesar Ionkov fid = v9fs_create(v9ses, dir, dentry, NULL, perm, 668dd6102fbSSripathi Kodi v9fs_uflags2omode(flags, 669dd6102fbSSripathi Kodi v9fs_proto_dotu(v9ses))); 670bd238fb4SLatchesar Ionkov if (IS_ERR(fid)) { 671bd238fb4SLatchesar Ionkov err = PTR_ERR(fid); 672bd238fb4SLatchesar Ionkov fid = NULL; 6736a3124a3SLatchesar Ionkov goto error; 6746a3124a3SLatchesar Ionkov } 6756a3124a3SLatchesar Ionkov 676bd238fb4SLatchesar Ionkov /* if we are opening a file, assign the open fid to the file */ 6776a3124a3SLatchesar Ionkov if (nd && nd->flags & LOOKUP_OPEN) { 6786a3124a3SLatchesar Ionkov filp = lookup_instantiate_filp(nd, dentry, v9fs_open_created); 6796a3124a3SLatchesar Ionkov if (IS_ERR(filp)) { 680bd238fb4SLatchesar Ionkov err = PTR_ERR(filp); 681bd238fb4SLatchesar Ionkov goto error; 6826a3124a3SLatchesar Ionkov } 6836a3124a3SLatchesar Ionkov 684bd238fb4SLatchesar Ionkov filp->private_data = fid; 685bd238fb4SLatchesar Ionkov } else 686bd238fb4SLatchesar Ionkov p9_client_clunk(fid); 6876a3124a3SLatchesar Ionkov 6886a3124a3SLatchesar Ionkov return 0; 6896a3124a3SLatchesar Ionkov 6906a3124a3SLatchesar Ionkov error: 691bd238fb4SLatchesar Ionkov if (fid) 692bd238fb4SLatchesar Ionkov p9_client_clunk(fid); 6936a3124a3SLatchesar Ionkov 6946a3124a3SLatchesar Ionkov return err; 6952bad8471SEric Van Hensbergen } 6962bad8471SEric Van Hensbergen 6972bad8471SEric Van Hensbergen /** 6982bad8471SEric Van Hensbergen * v9fs_vfs_mkdir - VFS mkdir hook to create a directory 699ee443996SEric Van Hensbergen * @dir: inode that is being unlinked 7002bad8471SEric Van Hensbergen * @dentry: dentry that is being unlinked 7012bad8471SEric Van Hensbergen * @mode: mode for new directory 7022bad8471SEric Van Hensbergen * 7032bad8471SEric Van Hensbergen */ 7042bad8471SEric Van Hensbergen 7056a3124a3SLatchesar Ionkov static int v9fs_vfs_mkdir(struct inode *dir, struct dentry *dentry, int mode) 7062bad8471SEric Van Hensbergen { 7076a3124a3SLatchesar Ionkov int err; 708bd238fb4SLatchesar Ionkov u32 perm; 7096a3124a3SLatchesar Ionkov struct v9fs_session_info *v9ses; 710bd238fb4SLatchesar Ionkov struct p9_fid *fid; 7116a3124a3SLatchesar Ionkov 712bd238fb4SLatchesar Ionkov P9_DPRINTK(P9_DEBUG_VFS, "name %s\n", dentry->d_name.name); 713bd238fb4SLatchesar Ionkov err = 0; 7146a3124a3SLatchesar Ionkov v9ses = v9fs_inode2v9ses(dir); 7156a3124a3SLatchesar Ionkov perm = unixmode2p9mode(v9ses, mode | S_IFDIR); 716bd238fb4SLatchesar Ionkov fid = v9fs_create(v9ses, dir, dentry, NULL, perm, P9_OREAD); 717bd238fb4SLatchesar Ionkov if (IS_ERR(fid)) { 718bd238fb4SLatchesar Ionkov err = PTR_ERR(fid); 719bd238fb4SLatchesar Ionkov fid = NULL; 7206a3124a3SLatchesar Ionkov } 7216a3124a3SLatchesar Ionkov 722bd238fb4SLatchesar Ionkov if (fid) 723bd238fb4SLatchesar Ionkov p9_client_clunk(fid); 7246a3124a3SLatchesar Ionkov 7256a3124a3SLatchesar Ionkov return err; 7262bad8471SEric Van Hensbergen } 7272bad8471SEric Van Hensbergen 7282bad8471SEric Van Hensbergen /** 7292bad8471SEric Van Hensbergen * v9fs_vfs_lookup - VFS lookup hook to "walk" to a new inode 7302bad8471SEric Van Hensbergen * @dir: inode that is being walked from 7312bad8471SEric Van Hensbergen * @dentry: dentry that is being walked to? 7322bad8471SEric Van Hensbergen * @nameidata: path data 7332bad8471SEric Van Hensbergen * 7342bad8471SEric Van Hensbergen */ 7352bad8471SEric Van Hensbergen 7362bad8471SEric Van Hensbergen static struct dentry *v9fs_vfs_lookup(struct inode *dir, struct dentry *dentry, 7372bad8471SEric Van Hensbergen struct nameidata *nameidata) 7382bad8471SEric Van Hensbergen { 7392bad8471SEric Van Hensbergen struct super_block *sb; 7402bad8471SEric Van Hensbergen struct v9fs_session_info *v9ses; 741bd238fb4SLatchesar Ionkov struct p9_fid *dfid, *fid; 7422bad8471SEric Van Hensbergen struct inode *inode; 743bd238fb4SLatchesar Ionkov char *name; 7442bad8471SEric Van Hensbergen int result = 0; 7452bad8471SEric Van Hensbergen 746bd238fb4SLatchesar Ionkov P9_DPRINTK(P9_DEBUG_VFS, "dir: %p dentry: (%s) %p nameidata: %p\n", 747731805b4SLatchesar Ionkov dir, dentry->d_name.name, dentry, nameidata); 7482bad8471SEric Van Hensbergen 74911e9b49bSSripathi Kodi if (dentry->d_name.len > NAME_MAX) 75011e9b49bSSripathi Kodi return ERR_PTR(-ENAMETOOLONG); 75111e9b49bSSripathi Kodi 7522bad8471SEric Van Hensbergen sb = dir->i_sb; 7532bad8471SEric Van Hensbergen v9ses = v9fs_inode2v9ses(dir); 754bd238fb4SLatchesar Ionkov dfid = v9fs_fid_lookup(dentry->d_parent); 755bd238fb4SLatchesar Ionkov if (IS_ERR(dfid)) 756e231c2eeSDavid Howells return ERR_CAST(dfid); 7572bad8471SEric Van Hensbergen 758bd238fb4SLatchesar Ionkov name = (char *) dentry->d_name.name; 759bd238fb4SLatchesar Ionkov fid = p9_client_walk(dfid, 1, &name, 1); 760bd238fb4SLatchesar Ionkov if (IS_ERR(fid)) { 761bd238fb4SLatchesar Ionkov result = PTR_ERR(fid); 7622bad8471SEric Van Hensbergen if (result == -ENOENT) { 76385e0df24SAneesh Kumar K.V inode = NULL; 76485e0df24SAneesh Kumar K.V goto inst_out; 7652bad8471SEric Van Hensbergen } 7662bad8471SEric Van Hensbergen 767bd238fb4SLatchesar Ionkov return ERR_PTR(result); 7682bad8471SEric Van Hensbergen } 7692bad8471SEric Van Hensbergen 770bd238fb4SLatchesar Ionkov inode = v9fs_inode_from_fid(v9ses, fid, dir->i_sb); 771bd238fb4SLatchesar Ionkov if (IS_ERR(inode)) { 772bd238fb4SLatchesar Ionkov result = PTR_ERR(inode); 773bd238fb4SLatchesar Ionkov inode = NULL; 774bd238fb4SLatchesar Ionkov goto error; 7752bad8471SEric Van Hensbergen } 7762bad8471SEric Van Hensbergen 777bd238fb4SLatchesar Ionkov result = v9fs_fid_add(dentry, fid); 7786a3124a3SLatchesar Ionkov if (result < 0) 779bd238fb4SLatchesar Ionkov goto error; 7806a3124a3SLatchesar Ionkov 78185e0df24SAneesh Kumar K.V inst_out: 78285e0df24SAneesh Kumar K.V if (v9ses->cache) 783e03abc0cSEric Van Hensbergen dentry->d_op = &v9fs_cached_dentry_operations; 784e03abc0cSEric Van Hensbergen else 785e03abc0cSEric Van Hensbergen dentry->d_op = &v9fs_dentry_operations; 7862bad8471SEric Van Hensbergen 7872bad8471SEric Van Hensbergen d_add(dentry, inode); 7882bad8471SEric Van Hensbergen return NULL; 7892bad8471SEric Van Hensbergen 790bd238fb4SLatchesar Ionkov error: 791bd238fb4SLatchesar Ionkov p9_client_clunk(fid); 792da977b2cSEric Van Hensbergen 7932bad8471SEric Van Hensbergen return ERR_PTR(result); 7942bad8471SEric Van Hensbergen } 7952bad8471SEric Van Hensbergen 7962bad8471SEric Van Hensbergen /** 7972bad8471SEric Van Hensbergen * v9fs_vfs_unlink - VFS unlink hook to delete an inode 7982bad8471SEric Van Hensbergen * @i: inode that is being unlinked 79973c592b9SEric Van Hensbergen * @d: dentry that is being unlinked 8002bad8471SEric Van Hensbergen * 8012bad8471SEric Van Hensbergen */ 8022bad8471SEric Van Hensbergen 8032bad8471SEric Van Hensbergen static int v9fs_vfs_unlink(struct inode *i, struct dentry *d) 8042bad8471SEric Van Hensbergen { 8052bad8471SEric Van Hensbergen return v9fs_remove(i, d, 0); 8062bad8471SEric Van Hensbergen } 8072bad8471SEric Van Hensbergen 8082bad8471SEric Van Hensbergen /** 8092bad8471SEric Van Hensbergen * v9fs_vfs_rmdir - VFS unlink hook to delete a directory 8102bad8471SEric Van Hensbergen * @i: inode that is being unlinked 81173c592b9SEric Van Hensbergen * @d: dentry that is being unlinked 8122bad8471SEric Van Hensbergen * 8132bad8471SEric Van Hensbergen */ 8142bad8471SEric Van Hensbergen 8152bad8471SEric Van Hensbergen static int v9fs_vfs_rmdir(struct inode *i, struct dentry *d) 8162bad8471SEric Van Hensbergen { 8172bad8471SEric Van Hensbergen return v9fs_remove(i, d, 1); 8182bad8471SEric Van Hensbergen } 8192bad8471SEric Van Hensbergen 8202bad8471SEric Van Hensbergen /** 8212bad8471SEric Van Hensbergen * v9fs_vfs_rename - VFS hook to rename an inode 8222bad8471SEric Van Hensbergen * @old_dir: old dir inode 8232bad8471SEric Van Hensbergen * @old_dentry: old dentry 8242bad8471SEric Van Hensbergen * @new_dir: new dir inode 8252bad8471SEric Van Hensbergen * @new_dentry: new dentry 8262bad8471SEric Van Hensbergen * 8272bad8471SEric Van Hensbergen */ 8282bad8471SEric Van Hensbergen 8292bad8471SEric Van Hensbergen static int 8302bad8471SEric Van Hensbergen v9fs_vfs_rename(struct inode *old_dir, struct dentry *old_dentry, 8312bad8471SEric Van Hensbergen struct inode *new_dir, struct dentry *new_dentry) 8322bad8471SEric Van Hensbergen { 833bd238fb4SLatchesar Ionkov struct inode *old_inode; 834bd238fb4SLatchesar Ionkov struct v9fs_session_info *v9ses; 835bd238fb4SLatchesar Ionkov struct p9_fid *oldfid; 836bd238fb4SLatchesar Ionkov struct p9_fid *olddirfid; 837bd238fb4SLatchesar Ionkov struct p9_fid *newdirfid; 838bd238fb4SLatchesar Ionkov struct p9_wstat wstat; 839bd238fb4SLatchesar Ionkov int retval; 8402bad8471SEric Van Hensbergen 841bd238fb4SLatchesar Ionkov P9_DPRINTK(P9_DEBUG_VFS, "\n"); 842bd238fb4SLatchesar Ionkov retval = 0; 843bd238fb4SLatchesar Ionkov old_inode = old_dentry->d_inode; 844bd238fb4SLatchesar Ionkov v9ses = v9fs_inode2v9ses(old_inode); 845bd238fb4SLatchesar Ionkov oldfid = v9fs_fid_lookup(old_dentry); 846da977b2cSEric Van Hensbergen if (IS_ERR(oldfid)) 847da977b2cSEric Van Hensbergen return PTR_ERR(oldfid); 848da977b2cSEric Van Hensbergen 849da977b2cSEric Van Hensbergen olddirfid = v9fs_fid_clone(old_dentry->d_parent); 850da977b2cSEric Van Hensbergen if (IS_ERR(olddirfid)) { 851da977b2cSEric Van Hensbergen retval = PTR_ERR(olddirfid); 852bd238fb4SLatchesar Ionkov goto done; 853da977b2cSEric Van Hensbergen } 854da977b2cSEric Van Hensbergen 855da977b2cSEric Van Hensbergen newdirfid = v9fs_fid_clone(new_dentry->d_parent); 856da977b2cSEric Van Hensbergen if (IS_ERR(newdirfid)) { 857da977b2cSEric Van Hensbergen retval = PTR_ERR(newdirfid); 858bd238fb4SLatchesar Ionkov goto clunk_olddir; 8592bad8471SEric Van Hensbergen } 8602bad8471SEric Van Hensbergen 8614681dbdaSSripathi Kodi if (v9fs_proto_dotl(v9ses)) { 8624681dbdaSSripathi Kodi retval = p9_client_rename(oldfid, newdirfid, 8634681dbdaSSripathi Kodi (char *) new_dentry->d_name.name); 8644681dbdaSSripathi Kodi if (retval != -ENOSYS) 8654681dbdaSSripathi Kodi goto clunk_newdir; 8664681dbdaSSripathi Kodi } 8674681dbdaSSripathi Kodi 8682bad8471SEric Van Hensbergen /* 9P can only handle file rename in the same directory */ 8692bad8471SEric Van Hensbergen if (memcmp(&olddirfid->qid, &newdirfid->qid, sizeof(newdirfid->qid))) { 870bd238fb4SLatchesar Ionkov P9_DPRINTK(P9_DEBUG_ERROR, 871bd238fb4SLatchesar Ionkov "old dir and new dir are different\n"); 872621997cdSEric Van Hensbergen retval = -EXDEV; 873bd238fb4SLatchesar Ionkov goto clunk_newdir; 8742bad8471SEric Van Hensbergen } 8752bad8471SEric Van Hensbergen 876531b1094SLatchesar Ionkov v9fs_blank_wstat(&wstat); 877ba17674fSLatchesar Ionkov wstat.muid = v9ses->uname; 878531b1094SLatchesar Ionkov wstat.name = (char *) new_dentry->d_name.name; 879bd238fb4SLatchesar Ionkov retval = p9_client_wstat(oldfid, &wstat); 8802bad8471SEric Van Hensbergen 881bd238fb4SLatchesar Ionkov clunk_newdir: 88222150c4fSLatchesar Ionkov p9_client_clunk(newdirfid); 8832bad8471SEric Van Hensbergen 884bd238fb4SLatchesar Ionkov clunk_olddir: 88522150c4fSLatchesar Ionkov p9_client_clunk(olddirfid); 8862bad8471SEric Van Hensbergen 887bd238fb4SLatchesar Ionkov done: 8882bad8471SEric Van Hensbergen return retval; 8892bad8471SEric Van Hensbergen } 8902bad8471SEric Van Hensbergen 8912bad8471SEric Van Hensbergen /** 892943ffb58SAdrian Bunk * v9fs_vfs_getattr - retrieve file metadata 893ee443996SEric Van Hensbergen * @mnt: mount information 894ee443996SEric Van Hensbergen * @dentry: file to get attributes on 895ee443996SEric Van Hensbergen * @stat: metadata structure to populate 8962bad8471SEric Van Hensbergen * 8972bad8471SEric Van Hensbergen */ 8982bad8471SEric Van Hensbergen 8992bad8471SEric Van Hensbergen static int 9002bad8471SEric Van Hensbergen v9fs_vfs_getattr(struct vfsmount *mnt, struct dentry *dentry, 9012bad8471SEric Van Hensbergen struct kstat *stat) 9022bad8471SEric Van Hensbergen { 903bd238fb4SLatchesar Ionkov int err; 904bd238fb4SLatchesar Ionkov struct v9fs_session_info *v9ses; 905bd238fb4SLatchesar Ionkov struct p9_fid *fid; 90651a87c55SEric Van Hensbergen struct p9_wstat *st; 9072bad8471SEric Van Hensbergen 908bd238fb4SLatchesar Ionkov P9_DPRINTK(P9_DEBUG_VFS, "dentry: %p\n", dentry); 909bd238fb4SLatchesar Ionkov err = -EPERM; 910bd238fb4SLatchesar Ionkov v9ses = v9fs_inode2v9ses(dentry->d_inode); 91160e78d2cSAbhishek Kulkarni if (v9ses->cache == CACHE_LOOSE || v9ses->cache == CACHE_FSCACHE) 9129523a841SEric Van Hensbergen return simple_getattr(mnt, dentry, stat); 9139523a841SEric Van Hensbergen 914bd238fb4SLatchesar Ionkov fid = v9fs_fid_lookup(dentry); 915da977b2cSEric Van Hensbergen if (IS_ERR(fid)) 916da977b2cSEric Van Hensbergen return PTR_ERR(fid); 9172bad8471SEric Van Hensbergen 918bd238fb4SLatchesar Ionkov st = p9_client_stat(fid); 919bd238fb4SLatchesar Ionkov if (IS_ERR(st)) 920bd238fb4SLatchesar Ionkov return PTR_ERR(st); 9212bad8471SEric Van Hensbergen 922bd238fb4SLatchesar Ionkov v9fs_stat2inode(st, dentry->d_inode, dentry->d_inode->i_sb); 9232bad8471SEric Van Hensbergen generic_fillattr(dentry->d_inode, stat); 9242bad8471SEric Van Hensbergen 925bd238fb4SLatchesar Ionkov kfree(st); 926bd238fb4SLatchesar Ionkov return 0; 9272bad8471SEric Van Hensbergen } 9282bad8471SEric Van Hensbergen 929f0853122SSripathi Kodi static int 930f0853122SSripathi Kodi v9fs_vfs_getattr_dotl(struct vfsmount *mnt, struct dentry *dentry, 931f0853122SSripathi Kodi struct kstat *stat) 932f0853122SSripathi Kodi { 933f0853122SSripathi Kodi int err; 934f0853122SSripathi Kodi struct v9fs_session_info *v9ses; 935f0853122SSripathi Kodi struct p9_fid *fid; 936f0853122SSripathi Kodi struct p9_stat_dotl *st; 937f0853122SSripathi Kodi 938f0853122SSripathi Kodi P9_DPRINTK(P9_DEBUG_VFS, "dentry: %p\n", dentry); 939f0853122SSripathi Kodi err = -EPERM; 940f0853122SSripathi Kodi v9ses = v9fs_inode2v9ses(dentry->d_inode); 941f0853122SSripathi Kodi if (v9ses->cache == CACHE_LOOSE || v9ses->cache == CACHE_FSCACHE) 942f0853122SSripathi Kodi return simple_getattr(mnt, dentry, stat); 943f0853122SSripathi Kodi 944f0853122SSripathi Kodi fid = v9fs_fid_lookup(dentry); 945f0853122SSripathi Kodi if (IS_ERR(fid)) 946f0853122SSripathi Kodi return PTR_ERR(fid); 947f0853122SSripathi Kodi 948f0853122SSripathi Kodi /* Ask for all the fields in stat structure. Server will return 949f0853122SSripathi Kodi * whatever it supports 950f0853122SSripathi Kodi */ 951f0853122SSripathi Kodi 952f0853122SSripathi Kodi st = p9_client_getattr_dotl(fid, P9_STATS_ALL); 953f0853122SSripathi Kodi if (IS_ERR(st)) 954f0853122SSripathi Kodi return PTR_ERR(st); 955f0853122SSripathi Kodi 956f0853122SSripathi Kodi v9fs_stat2inode_dotl(st, dentry->d_inode); 957f0853122SSripathi Kodi generic_fillattr(dentry->d_inode, stat); 958f0853122SSripathi Kodi /* Change block size to what the server returned */ 959f0853122SSripathi Kodi stat->blksize = st->st_blksize; 960f0853122SSripathi Kodi 961f0853122SSripathi Kodi kfree(st); 962f0853122SSripathi Kodi return 0; 963f0853122SSripathi Kodi } 964f0853122SSripathi Kodi 9652bad8471SEric Van Hensbergen /** 9662bad8471SEric Van Hensbergen * v9fs_vfs_setattr - set file metadata 9672bad8471SEric Van Hensbergen * @dentry: file whose metadata to set 9682bad8471SEric Van Hensbergen * @iattr: metadata assignment structure 9692bad8471SEric Van Hensbergen * 9702bad8471SEric Van Hensbergen */ 9712bad8471SEric Van Hensbergen 9722bad8471SEric Van Hensbergen static int v9fs_vfs_setattr(struct dentry *dentry, struct iattr *iattr) 9732bad8471SEric Van Hensbergen { 974bd238fb4SLatchesar Ionkov int retval; 975bd238fb4SLatchesar Ionkov struct v9fs_session_info *v9ses; 976bd238fb4SLatchesar Ionkov struct p9_fid *fid; 977bd238fb4SLatchesar Ionkov struct p9_wstat wstat; 9782bad8471SEric Van Hensbergen 979bd238fb4SLatchesar Ionkov P9_DPRINTK(P9_DEBUG_VFS, "\n"); 980bd238fb4SLatchesar Ionkov retval = -EPERM; 981bd238fb4SLatchesar Ionkov v9ses = v9fs_inode2v9ses(dentry->d_inode); 982bd238fb4SLatchesar Ionkov fid = v9fs_fid_lookup(dentry); 983da977b2cSEric Van Hensbergen if(IS_ERR(fid)) 984da977b2cSEric Van Hensbergen return PTR_ERR(fid); 9852bad8471SEric Van Hensbergen 986531b1094SLatchesar Ionkov v9fs_blank_wstat(&wstat); 9872bad8471SEric Van Hensbergen if (iattr->ia_valid & ATTR_MODE) 988531b1094SLatchesar Ionkov wstat.mode = unixmode2p9mode(v9ses, iattr->ia_mode); 9892bad8471SEric Van Hensbergen 9902bad8471SEric Van Hensbergen if (iattr->ia_valid & ATTR_MTIME) 991531b1094SLatchesar Ionkov wstat.mtime = iattr->ia_mtime.tv_sec; 9922bad8471SEric Van Hensbergen 9932bad8471SEric Van Hensbergen if (iattr->ia_valid & ATTR_ATIME) 994531b1094SLatchesar Ionkov wstat.atime = iattr->ia_atime.tv_sec; 9952bad8471SEric Van Hensbergen 9962bad8471SEric Van Hensbergen if (iattr->ia_valid & ATTR_SIZE) 997531b1094SLatchesar Ionkov wstat.length = iattr->ia_size; 9982bad8471SEric Van Hensbergen 999dd6102fbSSripathi Kodi if (v9fs_proto_dotu(v9ses)) { 1000531b1094SLatchesar Ionkov if (iattr->ia_valid & ATTR_UID) 1001531b1094SLatchesar Ionkov wstat.n_uid = iattr->ia_uid; 10022bad8471SEric Van Hensbergen 1003531b1094SLatchesar Ionkov if (iattr->ia_valid & ATTR_GID) 1004531b1094SLatchesar Ionkov wstat.n_gid = iattr->ia_gid; 10052bad8471SEric Van Hensbergen } 10062bad8471SEric Van Hensbergen 1007bd238fb4SLatchesar Ionkov retval = p9_client_wstat(fid, &wstat); 1008bd238fb4SLatchesar Ionkov if (retval >= 0) 1009bd238fb4SLatchesar Ionkov retval = inode_setattr(dentry->d_inode, iattr); 10102bad8471SEric Van Hensbergen 1011bd238fb4SLatchesar Ionkov return retval; 10122bad8471SEric Van Hensbergen } 10132bad8471SEric Van Hensbergen 10142bad8471SEric Van Hensbergen /** 101587d7845aSSripathi Kodi * v9fs_vfs_setattr_dotl - set file metadata 101687d7845aSSripathi Kodi * @dentry: file whose metadata to set 101787d7845aSSripathi Kodi * @iattr: metadata assignment structure 101887d7845aSSripathi Kodi * 101987d7845aSSripathi Kodi */ 102087d7845aSSripathi Kodi 102187d7845aSSripathi Kodi static int v9fs_vfs_setattr_dotl(struct dentry *dentry, struct iattr *iattr) 102287d7845aSSripathi Kodi { 102387d7845aSSripathi Kodi int retval; 102487d7845aSSripathi Kodi struct v9fs_session_info *v9ses; 102587d7845aSSripathi Kodi struct p9_fid *fid; 102687d7845aSSripathi Kodi struct p9_iattr_dotl p9attr; 102787d7845aSSripathi Kodi 102887d7845aSSripathi Kodi P9_DPRINTK(P9_DEBUG_VFS, "\n"); 102987d7845aSSripathi Kodi 103087d7845aSSripathi Kodi retval = inode_change_ok(dentry->d_inode, iattr); 103187d7845aSSripathi Kodi if (retval) 103287d7845aSSripathi Kodi return retval; 103387d7845aSSripathi Kodi 103487d7845aSSripathi Kodi p9attr.valid = iattr->ia_valid; 103587d7845aSSripathi Kodi p9attr.mode = iattr->ia_mode; 103687d7845aSSripathi Kodi p9attr.uid = iattr->ia_uid; 103787d7845aSSripathi Kodi p9attr.gid = iattr->ia_gid; 103887d7845aSSripathi Kodi p9attr.size = iattr->ia_size; 103987d7845aSSripathi Kodi p9attr.atime_sec = iattr->ia_atime.tv_sec; 104087d7845aSSripathi Kodi p9attr.atime_nsec = iattr->ia_atime.tv_nsec; 104187d7845aSSripathi Kodi p9attr.mtime_sec = iattr->ia_mtime.tv_sec; 104287d7845aSSripathi Kodi p9attr.mtime_nsec = iattr->ia_mtime.tv_nsec; 104387d7845aSSripathi Kodi 104487d7845aSSripathi Kodi retval = -EPERM; 104587d7845aSSripathi Kodi v9ses = v9fs_inode2v9ses(dentry->d_inode); 104687d7845aSSripathi Kodi fid = v9fs_fid_lookup(dentry); 104787d7845aSSripathi Kodi if (IS_ERR(fid)) 104887d7845aSSripathi Kodi return PTR_ERR(fid); 104987d7845aSSripathi Kodi 105087d7845aSSripathi Kodi retval = p9_client_setattr(fid, &p9attr); 105187d7845aSSripathi Kodi if (retval >= 0) 105287d7845aSSripathi Kodi retval = inode_setattr(dentry->d_inode, iattr); 105387d7845aSSripathi Kodi 105487d7845aSSripathi Kodi return retval; 105587d7845aSSripathi Kodi } 105687d7845aSSripathi Kodi 105787d7845aSSripathi Kodi /** 1058531b1094SLatchesar Ionkov * v9fs_stat2inode - populate an inode structure with mistat info 1059531b1094SLatchesar Ionkov * @stat: Plan 9 metadata (mistat) structure 10602bad8471SEric Van Hensbergen * @inode: inode to populate 10612bad8471SEric Van Hensbergen * @sb: superblock of filesystem 10622bad8471SEric Van Hensbergen * 10632bad8471SEric Van Hensbergen */ 10642bad8471SEric Van Hensbergen 10652bad8471SEric Van Hensbergen void 106651a87c55SEric Van Hensbergen v9fs_stat2inode(struct p9_wstat *stat, struct inode *inode, 10672bad8471SEric Van Hensbergen struct super_block *sb) 10682bad8471SEric Van Hensbergen { 1069531b1094SLatchesar Ionkov char ext[32]; 10705717144aSAneesh Kumar K.V char tag_name[14]; 10715717144aSAneesh Kumar K.V unsigned int i_nlink; 10722bad8471SEric Van Hensbergen struct v9fs_session_info *v9ses = sb->s_fs_info; 10732bad8471SEric Van Hensbergen 10742bad8471SEric Van Hensbergen inode->i_nlink = 1; 10752bad8471SEric Van Hensbergen 1076531b1094SLatchesar Ionkov inode->i_atime.tv_sec = stat->atime; 1077531b1094SLatchesar Ionkov inode->i_mtime.tv_sec = stat->mtime; 1078531b1094SLatchesar Ionkov inode->i_ctime.tv_sec = stat->mtime; 10792bad8471SEric Van Hensbergen 1080bd32b82dSLatchesar Ionkov inode->i_uid = v9ses->dfltuid; 1081bd32b82dSLatchesar Ionkov inode->i_gid = v9ses->dfltgid; 10822bad8471SEric Van Hensbergen 1083dd6102fbSSripathi Kodi if (v9fs_proto_dotu(v9ses)) { 1084531b1094SLatchesar Ionkov inode->i_uid = stat->n_uid; 1085531b1094SLatchesar Ionkov inode->i_gid = stat->n_gid; 1086531b1094SLatchesar Ionkov } 10875717144aSAneesh Kumar K.V if ((S_ISREG(inode->i_mode)) || (S_ISDIR(inode->i_mode))) { 10885717144aSAneesh Kumar K.V if (v9fs_proto_dotu(v9ses) && (stat->extension[0] != '\0')) { 10895717144aSAneesh Kumar K.V /* 10905717144aSAneesh Kumar K.V * Hadlink support got added later to 10915717144aSAneesh Kumar K.V * to the .u extension. So there can be 10925717144aSAneesh Kumar K.V * server out there that doesn't support 10935717144aSAneesh Kumar K.V * this even with .u extension. So check 10945717144aSAneesh Kumar K.V * for non NULL stat->extension 10955717144aSAneesh Kumar K.V */ 10965717144aSAneesh Kumar K.V strncpy(ext, stat->extension, sizeof(ext)); 10975717144aSAneesh Kumar K.V /* HARDLINKCOUNT %u */ 10985717144aSAneesh Kumar K.V sscanf(ext, "%13s %u", tag_name, &i_nlink); 10995717144aSAneesh Kumar K.V if (!strncmp(tag_name, "HARDLINKCOUNT", 13)) 11005717144aSAneesh Kumar K.V inode->i_nlink = i_nlink; 11015717144aSAneesh Kumar K.V } 11025717144aSAneesh Kumar K.V } 1103531b1094SLatchesar Ionkov inode->i_mode = p9mode2unixmode(v9ses, stat->mode); 11042bad8471SEric Van Hensbergen if ((S_ISBLK(inode->i_mode)) || (S_ISCHR(inode->i_mode))) { 11052bad8471SEric Van Hensbergen char type = 0; 11062bad8471SEric Van Hensbergen int major = -1; 11072bad8471SEric Van Hensbergen int minor = -1; 1108531b1094SLatchesar Ionkov 110951a87c55SEric Van Hensbergen strncpy(ext, stat->extension, sizeof(ext)); 1110531b1094SLatchesar Ionkov sscanf(ext, "%c %u %u", &type, &major, &minor); 11112bad8471SEric Van Hensbergen switch (type) { 11122bad8471SEric Van Hensbergen case 'c': 11132bad8471SEric Van Hensbergen inode->i_mode &= ~S_IFBLK; 11142bad8471SEric Van Hensbergen inode->i_mode |= S_IFCHR; 11152bad8471SEric Van Hensbergen break; 11162bad8471SEric Van Hensbergen case 'b': 11172bad8471SEric Van Hensbergen break; 11182bad8471SEric Van Hensbergen default: 1119bd238fb4SLatchesar Ionkov P9_DPRINTK(P9_DEBUG_ERROR, 112051a87c55SEric Van Hensbergen "Unknown special type %c %s\n", type, 112151a87c55SEric Van Hensbergen stat->extension); 11222bad8471SEric Van Hensbergen }; 11232bad8471SEric Van Hensbergen inode->i_rdev = MKDEV(major, minor); 112457c7b4e6SMagnus Deininger init_special_inode(inode, inode->i_mode, inode->i_rdev); 11252bad8471SEric Van Hensbergen } else 11262bad8471SEric Van Hensbergen inode->i_rdev = 0; 11272bad8471SEric Van Hensbergen 11287549ae3eSAbhishek Kulkarni i_size_write(inode, stat->length); 11292bad8471SEric Van Hensbergen 1130bd238fb4SLatchesar Ionkov /* not real number of blocks, but 512 byte ones ... */ 11317549ae3eSAbhishek Kulkarni inode->i_blocks = (i_size_read(inode) + 512 - 1) >> 9; 11322bad8471SEric Van Hensbergen } 11332bad8471SEric Van Hensbergen 11342bad8471SEric Van Hensbergen /** 1135f0853122SSripathi Kodi * v9fs_stat2inode_dotl - populate an inode structure with stat info 1136f0853122SSripathi Kodi * @stat: stat structure 1137f0853122SSripathi Kodi * @inode: inode to populate 1138f0853122SSripathi Kodi * @sb: superblock of filesystem 1139f0853122SSripathi Kodi * 1140f0853122SSripathi Kodi */ 1141f0853122SSripathi Kodi 1142f0853122SSripathi Kodi void 1143f0853122SSripathi Kodi v9fs_stat2inode_dotl(struct p9_stat_dotl *stat, struct inode *inode) 1144f0853122SSripathi Kodi { 1145f0853122SSripathi Kodi 1146f0853122SSripathi Kodi if ((stat->st_result_mask & P9_STATS_BASIC) == P9_STATS_BASIC) { 1147f0853122SSripathi Kodi inode->i_atime.tv_sec = stat->st_atime_sec; 1148f0853122SSripathi Kodi inode->i_atime.tv_nsec = stat->st_atime_nsec; 1149f0853122SSripathi Kodi inode->i_mtime.tv_sec = stat->st_mtime_sec; 1150f0853122SSripathi Kodi inode->i_mtime.tv_nsec = stat->st_mtime_nsec; 1151f0853122SSripathi Kodi inode->i_ctime.tv_sec = stat->st_ctime_sec; 1152f0853122SSripathi Kodi inode->i_ctime.tv_nsec = stat->st_ctime_nsec; 1153f0853122SSripathi Kodi inode->i_uid = stat->st_uid; 1154f0853122SSripathi Kodi inode->i_gid = stat->st_gid; 1155f0853122SSripathi Kodi inode->i_nlink = stat->st_nlink; 1156f0853122SSripathi Kodi inode->i_mode = stat->st_mode; 1157f0853122SSripathi Kodi inode->i_rdev = new_decode_dev(stat->st_rdev); 1158f0853122SSripathi Kodi 1159f0853122SSripathi Kodi if ((S_ISBLK(inode->i_mode)) || (S_ISCHR(inode->i_mode))) 1160f0853122SSripathi Kodi init_special_inode(inode, inode->i_mode, inode->i_rdev); 1161f0853122SSripathi Kodi 1162f0853122SSripathi Kodi i_size_write(inode, stat->st_size); 1163f0853122SSripathi Kodi inode->i_blocks = stat->st_blocks; 1164f0853122SSripathi Kodi } else { 1165f0853122SSripathi Kodi if (stat->st_result_mask & P9_STATS_ATIME) { 1166f0853122SSripathi Kodi inode->i_atime.tv_sec = stat->st_atime_sec; 1167f0853122SSripathi Kodi inode->i_atime.tv_nsec = stat->st_atime_nsec; 1168f0853122SSripathi Kodi } 1169f0853122SSripathi Kodi if (stat->st_result_mask & P9_STATS_MTIME) { 1170f0853122SSripathi Kodi inode->i_mtime.tv_sec = stat->st_mtime_sec; 1171f0853122SSripathi Kodi inode->i_mtime.tv_nsec = stat->st_mtime_nsec; 1172f0853122SSripathi Kodi } 1173f0853122SSripathi Kodi if (stat->st_result_mask & P9_STATS_CTIME) { 1174f0853122SSripathi Kodi inode->i_ctime.tv_sec = stat->st_ctime_sec; 1175f0853122SSripathi Kodi inode->i_ctime.tv_nsec = stat->st_ctime_nsec; 1176f0853122SSripathi Kodi } 1177f0853122SSripathi Kodi if (stat->st_result_mask & P9_STATS_UID) 1178f0853122SSripathi Kodi inode->i_uid = stat->st_uid; 1179f0853122SSripathi Kodi if (stat->st_result_mask & P9_STATS_GID) 1180f0853122SSripathi Kodi inode->i_gid = stat->st_gid; 1181f0853122SSripathi Kodi if (stat->st_result_mask & P9_STATS_NLINK) 1182f0853122SSripathi Kodi inode->i_nlink = stat->st_nlink; 1183f0853122SSripathi Kodi if (stat->st_result_mask & P9_STATS_MODE) { 1184f0853122SSripathi Kodi inode->i_mode = stat->st_mode; 1185f0853122SSripathi Kodi if ((S_ISBLK(inode->i_mode)) || 1186f0853122SSripathi Kodi (S_ISCHR(inode->i_mode))) 1187f0853122SSripathi Kodi init_special_inode(inode, inode->i_mode, 1188f0853122SSripathi Kodi inode->i_rdev); 1189f0853122SSripathi Kodi } 1190f0853122SSripathi Kodi if (stat->st_result_mask & P9_STATS_RDEV) 1191f0853122SSripathi Kodi inode->i_rdev = new_decode_dev(stat->st_rdev); 1192f0853122SSripathi Kodi if (stat->st_result_mask & P9_STATS_SIZE) 1193f0853122SSripathi Kodi i_size_write(inode, stat->st_size); 1194f0853122SSripathi Kodi if (stat->st_result_mask & P9_STATS_BLOCKS) 1195f0853122SSripathi Kodi inode->i_blocks = stat->st_blocks; 1196f0853122SSripathi Kodi } 1197f0853122SSripathi Kodi if (stat->st_result_mask & P9_STATS_GEN) 1198f0853122SSripathi Kodi inode->i_generation = stat->st_gen; 1199f0853122SSripathi Kodi 1200f0853122SSripathi Kodi /* Currently we don't support P9_STATS_BTIME and P9_STATS_DATA_VERSION 1201f0853122SSripathi Kodi * because the inode structure does not have fields for them. 1202f0853122SSripathi Kodi */ 1203f0853122SSripathi Kodi } 1204f0853122SSripathi Kodi 1205f0853122SSripathi Kodi /** 12062bad8471SEric Van Hensbergen * v9fs_qid2ino - convert qid into inode number 12072bad8471SEric Van Hensbergen * @qid: qid to hash 12082bad8471SEric Van Hensbergen * 12092bad8471SEric Van Hensbergen * BUG: potential for inode number collisions? 12102bad8471SEric Van Hensbergen */ 12112bad8471SEric Van Hensbergen 1212bd238fb4SLatchesar Ionkov ino_t v9fs_qid2ino(struct p9_qid *qid) 12132bad8471SEric Van Hensbergen { 12142bad8471SEric Van Hensbergen u64 path = qid->path + 2; 12152bad8471SEric Van Hensbergen ino_t i = 0; 12162bad8471SEric Van Hensbergen 12172bad8471SEric Van Hensbergen if (sizeof(ino_t) == sizeof(path)) 12182bad8471SEric Van Hensbergen memcpy(&i, &path, sizeof(ino_t)); 12192bad8471SEric Van Hensbergen else 12202bad8471SEric Van Hensbergen i = (ino_t) (path ^ (path >> 32)); 12212bad8471SEric Van Hensbergen 12222bad8471SEric Van Hensbergen return i; 12232bad8471SEric Van Hensbergen } 12242bad8471SEric Van Hensbergen 12252bad8471SEric Van Hensbergen /** 12262bad8471SEric Van Hensbergen * v9fs_readlink - read a symlink's location (internal version) 12272bad8471SEric Van Hensbergen * @dentry: dentry for symlink 122873c592b9SEric Van Hensbergen * @buffer: buffer to load symlink location into 12292bad8471SEric Van Hensbergen * @buflen: length of buffer 12302bad8471SEric Van Hensbergen * 12312bad8471SEric Van Hensbergen */ 12322bad8471SEric Van Hensbergen 12332bad8471SEric Van Hensbergen static int v9fs_readlink(struct dentry *dentry, char *buffer, int buflen) 12342bad8471SEric Van Hensbergen { 1235bd238fb4SLatchesar Ionkov int retval; 12362bad8471SEric Van Hensbergen 1237bd238fb4SLatchesar Ionkov struct v9fs_session_info *v9ses; 1238bd238fb4SLatchesar Ionkov struct p9_fid *fid; 123951a87c55SEric Van Hensbergen struct p9_wstat *st; 12402bad8471SEric Van Hensbergen 1241bd238fb4SLatchesar Ionkov P9_DPRINTK(P9_DEBUG_VFS, " %s\n", dentry->d_name.name); 1242bd238fb4SLatchesar Ionkov retval = -EPERM; 1243bd238fb4SLatchesar Ionkov v9ses = v9fs_inode2v9ses(dentry->d_inode); 1244bd238fb4SLatchesar Ionkov fid = v9fs_fid_lookup(dentry); 1245da977b2cSEric Van Hensbergen if (IS_ERR(fid)) 1246da977b2cSEric Van Hensbergen return PTR_ERR(fid); 12472bad8471SEric Van Hensbergen 124850cc42ffSVenkateswararao Jujjuri (JV) if (!v9fs_proto_dotu(v9ses) && !v9fs_proto_dotl(v9ses)) 1249bd238fb4SLatchesar Ionkov return -EBADF; 12502bad8471SEric Van Hensbergen 1251bd238fb4SLatchesar Ionkov st = p9_client_stat(fid); 1252bd238fb4SLatchesar Ionkov if (IS_ERR(st)) 1253bd238fb4SLatchesar Ionkov return PTR_ERR(st); 12542bad8471SEric Van Hensbergen 1255bd238fb4SLatchesar Ionkov if (!(st->mode & P9_DMSYMLINK)) { 12562bad8471SEric Van Hensbergen retval = -EINVAL; 1257bd238fb4SLatchesar Ionkov goto done; 12582bad8471SEric Van Hensbergen } 12592bad8471SEric Van Hensbergen 12602bad8471SEric Van Hensbergen /* copy extension buffer into buffer */ 126151a87c55SEric Van Hensbergen strncpy(buffer, st->extension, buflen); 12622bad8471SEric Van Hensbergen 1263bd238fb4SLatchesar Ionkov P9_DPRINTK(P9_DEBUG_VFS, 126451a87c55SEric Van Hensbergen "%s -> %s (%s)\n", dentry->d_name.name, st->extension, buffer); 1265bd238fb4SLatchesar Ionkov 12662511cd0bSMartin Stava retval = strnlen(buffer, buflen); 1267bd238fb4SLatchesar Ionkov done: 1268bd238fb4SLatchesar Ionkov kfree(st); 12692bad8471SEric Van Hensbergen return retval; 12702bad8471SEric Van Hensbergen } 12712bad8471SEric Van Hensbergen 12722bad8471SEric Van Hensbergen /** 12732bad8471SEric Van Hensbergen * v9fs_vfs_follow_link - follow a symlink path 12742bad8471SEric Van Hensbergen * @dentry: dentry for symlink 12752bad8471SEric Van Hensbergen * @nd: nameidata 12762bad8471SEric Van Hensbergen * 12772bad8471SEric Van Hensbergen */ 12782bad8471SEric Van Hensbergen 12792bad8471SEric Van Hensbergen static void *v9fs_vfs_follow_link(struct dentry *dentry, struct nameidata *nd) 12802bad8471SEric Van Hensbergen { 12812bad8471SEric Van Hensbergen int len = 0; 12822bad8471SEric Van Hensbergen char *link = __getname(); 12832bad8471SEric Van Hensbergen 1284bd238fb4SLatchesar Ionkov P9_DPRINTK(P9_DEBUG_VFS, "%s n", dentry->d_name.name); 12852bad8471SEric Van Hensbergen 12862bad8471SEric Van Hensbergen if (!link) 12872bad8471SEric Van Hensbergen link = ERR_PTR(-ENOMEM); 12882bad8471SEric Van Hensbergen else { 128916cce6d2SLatchesar Ionkov len = v9fs_readlink(dentry, link, PATH_MAX); 12902bad8471SEric Van Hensbergen 12912bad8471SEric Van Hensbergen if (len < 0) { 1292ce44eeb6SDavi Arnaut __putname(link); 12932bad8471SEric Van Hensbergen link = ERR_PTR(len); 12942bad8471SEric Van Hensbergen } else 12952511cd0bSMartin Stava link[min(len, PATH_MAX-1)] = 0; 12962bad8471SEric Van Hensbergen } 12972bad8471SEric Van Hensbergen nd_set_link(nd, link); 12982bad8471SEric Van Hensbergen 12992bad8471SEric Van Hensbergen return NULL; 13002bad8471SEric Van Hensbergen } 13012bad8471SEric Van Hensbergen 13022bad8471SEric Van Hensbergen /** 13032bad8471SEric Van Hensbergen * v9fs_vfs_put_link - release a symlink path 13042bad8471SEric Van Hensbergen * @dentry: dentry for symlink 13052bad8471SEric Van Hensbergen * @nd: nameidata 1306ee443996SEric Van Hensbergen * @p: unused 13072bad8471SEric Van Hensbergen * 13082bad8471SEric Van Hensbergen */ 13092bad8471SEric Van Hensbergen 1310ee443996SEric Van Hensbergen static void 1311ee443996SEric Van Hensbergen v9fs_vfs_put_link(struct dentry *dentry, struct nameidata *nd, void *p) 13122bad8471SEric Van Hensbergen { 13132bad8471SEric Van Hensbergen char *s = nd_get_link(nd); 13142bad8471SEric Van Hensbergen 13156ff23207SDuane Griffin P9_DPRINTK(P9_DEBUG_VFS, " %s %s\n", dentry->d_name.name, 13166ff23207SDuane Griffin IS_ERR(s) ? "<error>" : s); 13172bad8471SEric Van Hensbergen if (!IS_ERR(s)) 1318ce44eeb6SDavi Arnaut __putname(s); 13192bad8471SEric Van Hensbergen } 13202bad8471SEric Van Hensbergen 1321ee443996SEric Van Hensbergen /** 1322ee443996SEric Van Hensbergen * v9fs_vfs_mkspecial - create a special file 1323ee443996SEric Van Hensbergen * @dir: inode to create special file in 1324ee443996SEric Van Hensbergen * @dentry: dentry to create 1325ee443996SEric Van Hensbergen * @mode: mode to create special file 1326ee443996SEric Van Hensbergen * @extension: 9p2000.u format extension string representing special file 1327ee443996SEric Van Hensbergen * 1328ee443996SEric Van Hensbergen */ 1329ee443996SEric Van Hensbergen 1330531b1094SLatchesar Ionkov static int v9fs_vfs_mkspecial(struct inode *dir, struct dentry *dentry, 1331531b1094SLatchesar Ionkov int mode, const char *extension) 1332531b1094SLatchesar Ionkov { 1333bd238fb4SLatchesar Ionkov u32 perm; 1334531b1094SLatchesar Ionkov struct v9fs_session_info *v9ses; 1335bd238fb4SLatchesar Ionkov struct p9_fid *fid; 1336531b1094SLatchesar Ionkov 13376a3124a3SLatchesar Ionkov v9ses = v9fs_inode2v9ses(dir); 1338dd6102fbSSripathi Kodi if (!v9fs_proto_dotu(v9ses)) { 1339bd238fb4SLatchesar Ionkov P9_DPRINTK(P9_DEBUG_ERROR, "not extended\n"); 13406a3124a3SLatchesar Ionkov return -EPERM; 1341531b1094SLatchesar Ionkov } 1342531b1094SLatchesar Ionkov 1343da977b2cSEric Van Hensbergen perm = unixmode2p9mode(v9ses, mode); 1344bd238fb4SLatchesar Ionkov fid = v9fs_create(v9ses, dir, dentry, (char *) extension, perm, 1345bd238fb4SLatchesar Ionkov P9_OREAD); 1346bd238fb4SLatchesar Ionkov if (IS_ERR(fid)) 1347bd238fb4SLatchesar Ionkov return PTR_ERR(fid); 1348da977b2cSEric Van Hensbergen 1349bd238fb4SLatchesar Ionkov p9_client_clunk(fid); 13506a3124a3SLatchesar Ionkov return 0; 1351531b1094SLatchesar Ionkov } 1352531b1094SLatchesar Ionkov 1353531b1094SLatchesar Ionkov /** 135450cc42ffSVenkateswararao Jujjuri (JV) * v9fs_vfs_symlink_dotl - helper function to create symlinks 135550cc42ffSVenkateswararao Jujjuri (JV) * @dir: directory inode containing symlink 135650cc42ffSVenkateswararao Jujjuri (JV) * @dentry: dentry for symlink 135750cc42ffSVenkateswararao Jujjuri (JV) * @symname: symlink data 135850cc42ffSVenkateswararao Jujjuri (JV) * 135950cc42ffSVenkateswararao Jujjuri (JV) * See Also: 9P2000.L RFC for more information 136050cc42ffSVenkateswararao Jujjuri (JV) * 136150cc42ffSVenkateswararao Jujjuri (JV) */ 136250cc42ffSVenkateswararao Jujjuri (JV) 136350cc42ffSVenkateswararao Jujjuri (JV) static int 136450cc42ffSVenkateswararao Jujjuri (JV) v9fs_vfs_symlink_dotl(struct inode *dir, struct dentry *dentry, 136550cc42ffSVenkateswararao Jujjuri (JV) const char *symname) 136650cc42ffSVenkateswararao Jujjuri (JV) { 136750cc42ffSVenkateswararao Jujjuri (JV) struct v9fs_session_info *v9ses; 136850cc42ffSVenkateswararao Jujjuri (JV) struct p9_fid *dfid; 136950cc42ffSVenkateswararao Jujjuri (JV) struct p9_fid *fid = NULL; 137050cc42ffSVenkateswararao Jujjuri (JV) struct inode *inode; 137150cc42ffSVenkateswararao Jujjuri (JV) struct p9_qid qid; 137250cc42ffSVenkateswararao Jujjuri (JV) char *name; 137350cc42ffSVenkateswararao Jujjuri (JV) int err; 137450cc42ffSVenkateswararao Jujjuri (JV) gid_t gid; 137550cc42ffSVenkateswararao Jujjuri (JV) 137650cc42ffSVenkateswararao Jujjuri (JV) name = (char *) dentry->d_name.name; 137750cc42ffSVenkateswararao Jujjuri (JV) P9_DPRINTK(P9_DEBUG_VFS, "v9fs_vfs_symlink_dotl : %lu,%s,%s\n", 137850cc42ffSVenkateswararao Jujjuri (JV) dir->i_ino, name, symname); 137950cc42ffSVenkateswararao Jujjuri (JV) v9ses = v9fs_inode2v9ses(dir); 138050cc42ffSVenkateswararao Jujjuri (JV) 138150cc42ffSVenkateswararao Jujjuri (JV) dfid = v9fs_fid_lookup(dentry->d_parent); 138250cc42ffSVenkateswararao Jujjuri (JV) if (IS_ERR(dfid)) { 138350cc42ffSVenkateswararao Jujjuri (JV) err = PTR_ERR(dfid); 138450cc42ffSVenkateswararao Jujjuri (JV) P9_DPRINTK(P9_DEBUG_VFS, "fid lookup failed %d\n", err); 138550cc42ffSVenkateswararao Jujjuri (JV) return err; 138650cc42ffSVenkateswararao Jujjuri (JV) } 138750cc42ffSVenkateswararao Jujjuri (JV) 138850cc42ffSVenkateswararao Jujjuri (JV) gid = v9fs_get_fsgid_for_create(dir); 138950cc42ffSVenkateswararao Jujjuri (JV) 139050cc42ffSVenkateswararao Jujjuri (JV) if (gid < 0) { 139150cc42ffSVenkateswararao Jujjuri (JV) P9_DPRINTK(P9_DEBUG_VFS, "v9fs_get_egid failed %d\n", gid); 139250cc42ffSVenkateswararao Jujjuri (JV) goto error; 139350cc42ffSVenkateswararao Jujjuri (JV) } 139450cc42ffSVenkateswararao Jujjuri (JV) 139550cc42ffSVenkateswararao Jujjuri (JV) /* Server doesn't alter fid on TSYMLINK. Hence no need to clone it. */ 139650cc42ffSVenkateswararao Jujjuri (JV) err = p9_client_symlink(dfid, name, (char *)symname, gid, &qid); 139750cc42ffSVenkateswararao Jujjuri (JV) 139850cc42ffSVenkateswararao Jujjuri (JV) if (err < 0) { 139950cc42ffSVenkateswararao Jujjuri (JV) P9_DPRINTK(P9_DEBUG_VFS, "p9_client_symlink failed %d\n", err); 140050cc42ffSVenkateswararao Jujjuri (JV) goto error; 140150cc42ffSVenkateswararao Jujjuri (JV) } 140250cc42ffSVenkateswararao Jujjuri (JV) 140350cc42ffSVenkateswararao Jujjuri (JV) if (v9ses->cache) { 140450cc42ffSVenkateswararao Jujjuri (JV) /* Now walk from the parent so we can get an unopened fid. */ 140550cc42ffSVenkateswararao Jujjuri (JV) fid = p9_client_walk(dfid, 1, &name, 1); 140650cc42ffSVenkateswararao Jujjuri (JV) if (IS_ERR(fid)) { 140750cc42ffSVenkateswararao Jujjuri (JV) err = PTR_ERR(fid); 140850cc42ffSVenkateswararao Jujjuri (JV) P9_DPRINTK(P9_DEBUG_VFS, "p9_client_walk failed %d\n", 140950cc42ffSVenkateswararao Jujjuri (JV) err); 141050cc42ffSVenkateswararao Jujjuri (JV) fid = NULL; 141150cc42ffSVenkateswararao Jujjuri (JV) goto error; 141250cc42ffSVenkateswararao Jujjuri (JV) } 141350cc42ffSVenkateswararao Jujjuri (JV) 141450cc42ffSVenkateswararao Jujjuri (JV) /* instantiate inode and assign the unopened fid to dentry */ 141550cc42ffSVenkateswararao Jujjuri (JV) inode = v9fs_inode_from_fid(v9ses, fid, dir->i_sb); 141650cc42ffSVenkateswararao Jujjuri (JV) if (IS_ERR(inode)) { 141750cc42ffSVenkateswararao Jujjuri (JV) err = PTR_ERR(inode); 141850cc42ffSVenkateswararao Jujjuri (JV) P9_DPRINTK(P9_DEBUG_VFS, "inode creation failed %d\n", 141950cc42ffSVenkateswararao Jujjuri (JV) err); 142050cc42ffSVenkateswararao Jujjuri (JV) goto error; 142150cc42ffSVenkateswararao Jujjuri (JV) } 142250cc42ffSVenkateswararao Jujjuri (JV) dentry->d_op = &v9fs_cached_dentry_operations; 142350cc42ffSVenkateswararao Jujjuri (JV) d_instantiate(dentry, inode); 142450cc42ffSVenkateswararao Jujjuri (JV) err = v9fs_fid_add(dentry, fid); 142550cc42ffSVenkateswararao Jujjuri (JV) if (err < 0) 142650cc42ffSVenkateswararao Jujjuri (JV) goto error; 142750cc42ffSVenkateswararao Jujjuri (JV) fid = NULL; 142850cc42ffSVenkateswararao Jujjuri (JV) } else { 142950cc42ffSVenkateswararao Jujjuri (JV) /* Not in cached mode. No need to populate inode with stat */ 143050cc42ffSVenkateswararao Jujjuri (JV) inode = v9fs_get_inode(dir->i_sb, S_IFLNK); 143150cc42ffSVenkateswararao Jujjuri (JV) if (IS_ERR(inode)) { 143250cc42ffSVenkateswararao Jujjuri (JV) err = PTR_ERR(inode); 143350cc42ffSVenkateswararao Jujjuri (JV) goto error; 143450cc42ffSVenkateswararao Jujjuri (JV) } 143550cc42ffSVenkateswararao Jujjuri (JV) dentry->d_op = &v9fs_dentry_operations; 143650cc42ffSVenkateswararao Jujjuri (JV) d_instantiate(dentry, inode); 143750cc42ffSVenkateswararao Jujjuri (JV) } 143850cc42ffSVenkateswararao Jujjuri (JV) 143950cc42ffSVenkateswararao Jujjuri (JV) error: 144050cc42ffSVenkateswararao Jujjuri (JV) if (fid) 144150cc42ffSVenkateswararao Jujjuri (JV) p9_client_clunk(fid); 144250cc42ffSVenkateswararao Jujjuri (JV) 144350cc42ffSVenkateswararao Jujjuri (JV) return err; 144450cc42ffSVenkateswararao Jujjuri (JV) } 144550cc42ffSVenkateswararao Jujjuri (JV) 144650cc42ffSVenkateswararao Jujjuri (JV) /** 1447531b1094SLatchesar Ionkov * v9fs_vfs_symlink - helper function to create symlinks 1448531b1094SLatchesar Ionkov * @dir: directory inode containing symlink 1449531b1094SLatchesar Ionkov * @dentry: dentry for symlink 1450531b1094SLatchesar Ionkov * @symname: symlink data 1451531b1094SLatchesar Ionkov * 1452ee443996SEric Van Hensbergen * See Also: 9P2000.u RFC for more information 1453531b1094SLatchesar Ionkov * 1454531b1094SLatchesar Ionkov */ 1455531b1094SLatchesar Ionkov 1456531b1094SLatchesar Ionkov static int 1457531b1094SLatchesar Ionkov v9fs_vfs_symlink(struct inode *dir, struct dentry *dentry, const char *symname) 1458531b1094SLatchesar Ionkov { 1459bd238fb4SLatchesar Ionkov P9_DPRINTK(P9_DEBUG_VFS, " %lu,%s,%s\n", dir->i_ino, 1460bd238fb4SLatchesar Ionkov dentry->d_name.name, symname); 1461531b1094SLatchesar Ionkov 1462531b1094SLatchesar Ionkov return v9fs_vfs_mkspecial(dir, dentry, S_IFLNK, symname); 1463531b1094SLatchesar Ionkov } 1464531b1094SLatchesar Ionkov 14652bad8471SEric Van Hensbergen /** 14662bad8471SEric Van Hensbergen * v9fs_vfs_link - create a hardlink 14672bad8471SEric Van Hensbergen * @old_dentry: dentry for file to link to 14682bad8471SEric Van Hensbergen * @dir: inode destination for new link 146973c592b9SEric Van Hensbergen * @dentry: dentry for link 14702bad8471SEric Van Hensbergen * 14712bad8471SEric Van Hensbergen */ 14722bad8471SEric Van Hensbergen 14732bad8471SEric Van Hensbergen static int 14742bad8471SEric Van Hensbergen v9fs_vfs_link(struct dentry *old_dentry, struct inode *dir, 14752bad8471SEric Van Hensbergen struct dentry *dentry) 14762bad8471SEric Van Hensbergen { 1477531b1094SLatchesar Ionkov int retval; 1478bd238fb4SLatchesar Ionkov struct p9_fid *oldfid; 1479531b1094SLatchesar Ionkov char *name; 14802bad8471SEric Van Hensbergen 1481bd238fb4SLatchesar Ionkov P9_DPRINTK(P9_DEBUG_VFS, 1482bd238fb4SLatchesar Ionkov " %lu,%s,%s\n", dir->i_ino, dentry->d_name.name, 14832bad8471SEric Van Hensbergen old_dentry->d_name.name); 14842bad8471SEric Van Hensbergen 1485da977b2cSEric Van Hensbergen oldfid = v9fs_fid_clone(old_dentry); 1486da977b2cSEric Van Hensbergen if (IS_ERR(oldfid)) 1487da977b2cSEric Van Hensbergen return PTR_ERR(oldfid); 14882bad8471SEric Van Hensbergen 1489531b1094SLatchesar Ionkov name = __getname(); 1490da977b2cSEric Van Hensbergen if (unlikely(!name)) { 1491da977b2cSEric Van Hensbergen retval = -ENOMEM; 1492da977b2cSEric Van Hensbergen goto clunk_fid; 1493da977b2cSEric Van Hensbergen } 14940710d36aSFlorin Malita 149516cce6d2SLatchesar Ionkov sprintf(name, "%d\n", oldfid->fid); 1496bd238fb4SLatchesar Ionkov retval = v9fs_vfs_mkspecial(dir, dentry, P9_DMLINK, name); 1497531b1094SLatchesar Ionkov __putname(name); 14982bad8471SEric Van Hensbergen 1499da977b2cSEric Van Hensbergen clunk_fid: 1500bd238fb4SLatchesar Ionkov p9_client_clunk(oldfid); 15012bad8471SEric Van Hensbergen return retval; 15022bad8471SEric Van Hensbergen } 15032bad8471SEric Van Hensbergen 15042bad8471SEric Van Hensbergen /** 150509d34ee5SEric Van Hensbergen * v9fs_vfs_link_dotl - create a hardlink for dotl 150609d34ee5SEric Van Hensbergen * @old_dentry: dentry for file to link to 150709d34ee5SEric Van Hensbergen * @dir: inode destination for new link 150809d34ee5SEric Van Hensbergen * @dentry: dentry for link 150909d34ee5SEric Van Hensbergen * 151009d34ee5SEric Van Hensbergen */ 151109d34ee5SEric Van Hensbergen 151209d34ee5SEric Van Hensbergen static int 151309d34ee5SEric Van Hensbergen v9fs_vfs_link_dotl(struct dentry *old_dentry, struct inode *dir, 151409d34ee5SEric Van Hensbergen struct dentry *dentry) 151509d34ee5SEric Van Hensbergen { 151609d34ee5SEric Van Hensbergen int err; 151709d34ee5SEric Van Hensbergen struct p9_fid *dfid, *oldfid; 151809d34ee5SEric Van Hensbergen char *name; 151909d34ee5SEric Van Hensbergen struct v9fs_session_info *v9ses; 152009d34ee5SEric Van Hensbergen struct dentry *dir_dentry; 152109d34ee5SEric Van Hensbergen 152209d34ee5SEric Van Hensbergen P9_DPRINTK(P9_DEBUG_VFS, "dir ino: %lu, old_name: %s, new_name: %s\n", 152309d34ee5SEric Van Hensbergen dir->i_ino, old_dentry->d_name.name, 152409d34ee5SEric Van Hensbergen dentry->d_name.name); 152509d34ee5SEric Van Hensbergen 152609d34ee5SEric Van Hensbergen v9ses = v9fs_inode2v9ses(dir); 152709d34ee5SEric Van Hensbergen dir_dentry = v9fs_dentry_from_dir_inode(dir); 152809d34ee5SEric Van Hensbergen dfid = v9fs_fid_lookup(dir_dentry); 152909d34ee5SEric Van Hensbergen if (IS_ERR(dfid)) 153009d34ee5SEric Van Hensbergen return PTR_ERR(dfid); 153109d34ee5SEric Van Hensbergen 153209d34ee5SEric Van Hensbergen oldfid = v9fs_fid_lookup(old_dentry); 153309d34ee5SEric Van Hensbergen if (IS_ERR(oldfid)) 153409d34ee5SEric Van Hensbergen return PTR_ERR(oldfid); 153509d34ee5SEric Van Hensbergen 153609d34ee5SEric Van Hensbergen name = (char *) dentry->d_name.name; 153709d34ee5SEric Van Hensbergen 153809d34ee5SEric Van Hensbergen err = p9_client_link(dfid, oldfid, (char *)dentry->d_name.name); 153909d34ee5SEric Van Hensbergen 154009d34ee5SEric Van Hensbergen if (err < 0) { 154109d34ee5SEric Van Hensbergen P9_DPRINTK(P9_DEBUG_VFS, "p9_client_link failed %d\n", err); 154209d34ee5SEric Van Hensbergen return err; 154309d34ee5SEric Van Hensbergen } 154409d34ee5SEric Van Hensbergen 154509d34ee5SEric Van Hensbergen if (v9ses->cache == CACHE_LOOSE || v9ses->cache == CACHE_FSCACHE) { 154609d34ee5SEric Van Hensbergen /* Get the latest stat info from server. */ 154709d34ee5SEric Van Hensbergen struct p9_fid *fid; 154809d34ee5SEric Van Hensbergen struct p9_stat_dotl *st; 154909d34ee5SEric Van Hensbergen 155009d34ee5SEric Van Hensbergen fid = v9fs_fid_lookup(old_dentry); 155109d34ee5SEric Van Hensbergen if (IS_ERR(fid)) 155209d34ee5SEric Van Hensbergen return PTR_ERR(fid); 155309d34ee5SEric Van Hensbergen 155409d34ee5SEric Van Hensbergen st = p9_client_getattr_dotl(fid, P9_STATS_BASIC); 155509d34ee5SEric Van Hensbergen if (IS_ERR(st)) 155609d34ee5SEric Van Hensbergen return PTR_ERR(st); 155709d34ee5SEric Van Hensbergen 155809d34ee5SEric Van Hensbergen v9fs_stat2inode_dotl(st, old_dentry->d_inode); 155909d34ee5SEric Van Hensbergen 156009d34ee5SEric Van Hensbergen kfree(st); 156109d34ee5SEric Van Hensbergen } else { 156209d34ee5SEric Van Hensbergen /* Caching disabled. No need to get upto date stat info. 156309d34ee5SEric Van Hensbergen * This dentry will be released immediately. So, just i_count++ 156409d34ee5SEric Van Hensbergen */ 156509d34ee5SEric Van Hensbergen atomic_inc(&old_dentry->d_inode->i_count); 156609d34ee5SEric Van Hensbergen } 156709d34ee5SEric Van Hensbergen 156809d34ee5SEric Van Hensbergen dentry->d_op = old_dentry->d_op; 156909d34ee5SEric Van Hensbergen d_instantiate(dentry, old_dentry->d_inode); 157009d34ee5SEric Van Hensbergen 157109d34ee5SEric Van Hensbergen return err; 157209d34ee5SEric Van Hensbergen } 157309d34ee5SEric Van Hensbergen 157409d34ee5SEric Van Hensbergen /** 15752bad8471SEric Van Hensbergen * v9fs_vfs_mknod - create a special file 15762bad8471SEric Van Hensbergen * @dir: inode destination for new link 15772bad8471SEric Van Hensbergen * @dentry: dentry for file 15782bad8471SEric Van Hensbergen * @mode: mode for creation 1579ee443996SEric Van Hensbergen * @rdev: device associated with special file 15802bad8471SEric Van Hensbergen * 15812bad8471SEric Van Hensbergen */ 15822bad8471SEric Van Hensbergen 15832bad8471SEric Van Hensbergen static int 15842bad8471SEric Van Hensbergen v9fs_vfs_mknod(struct inode *dir, struct dentry *dentry, int mode, dev_t rdev) 15852bad8471SEric Van Hensbergen { 1586531b1094SLatchesar Ionkov int retval; 1587531b1094SLatchesar Ionkov char *name; 15882bad8471SEric Van Hensbergen 1589bd238fb4SLatchesar Ionkov P9_DPRINTK(P9_DEBUG_VFS, 1590bd238fb4SLatchesar Ionkov " %lu,%s mode: %x MAJOR: %u MINOR: %u\n", dir->i_ino, 15912bad8471SEric Van Hensbergen dentry->d_name.name, mode, MAJOR(rdev), MINOR(rdev)); 15922bad8471SEric Van Hensbergen 1593531b1094SLatchesar Ionkov if (!new_valid_dev(rdev)) 1594531b1094SLatchesar Ionkov return -EINVAL; 159573c592b9SEric Van Hensbergen 1596531b1094SLatchesar Ionkov name = __getname(); 1597c0291a05SEugene Teo if (!name) 1598c0291a05SEugene Teo return -ENOMEM; 15992bad8471SEric Van Hensbergen /* build extension */ 16002bad8471SEric Van Hensbergen if (S_ISBLK(mode)) 1601531b1094SLatchesar Ionkov sprintf(name, "b %u %u", MAJOR(rdev), MINOR(rdev)); 16022bad8471SEric Van Hensbergen else if (S_ISCHR(mode)) 1603531b1094SLatchesar Ionkov sprintf(name, "c %u %u", MAJOR(rdev), MINOR(rdev)); 160473c592b9SEric Van Hensbergen else if (S_ISFIFO(mode)) 1605531b1094SLatchesar Ionkov *name = 0; 160675cc5c9bSVenkateswararao Jujjuri else if (S_ISSOCK(mode)) 160775cc5c9bSVenkateswararao Jujjuri *name = 0; 16082bad8471SEric Van Hensbergen else { 1609531b1094SLatchesar Ionkov __putname(name); 1610531b1094SLatchesar Ionkov return -EINVAL; 16112bad8471SEric Van Hensbergen } 16122bad8471SEric Van Hensbergen 1613531b1094SLatchesar Ionkov retval = v9fs_vfs_mkspecial(dir, dentry, mode, name); 1614531b1094SLatchesar Ionkov __putname(name); 16152bad8471SEric Van Hensbergen 16162bad8471SEric Van Hensbergen return retval; 16172bad8471SEric Van Hensbergen } 16182bad8471SEric Van Hensbergen 16199b6533c9SSripathi Kodi static const struct inode_operations v9fs_dir_inode_operations_dotu = { 16209b6533c9SSripathi Kodi .create = v9fs_vfs_create, 16219b6533c9SSripathi Kodi .lookup = v9fs_vfs_lookup, 16229b6533c9SSripathi Kodi .symlink = v9fs_vfs_symlink, 162350cc42ffSVenkateswararao Jujjuri (JV) .link = v9fs_vfs_link, 16249b6533c9SSripathi Kodi .unlink = v9fs_vfs_unlink, 16259b6533c9SSripathi Kodi .mkdir = v9fs_vfs_mkdir, 16269b6533c9SSripathi Kodi .rmdir = v9fs_vfs_rmdir, 16279b6533c9SSripathi Kodi .mknod = v9fs_vfs_mknod, 16289b6533c9SSripathi Kodi .rename = v9fs_vfs_rename, 16299b6533c9SSripathi Kodi .getattr = v9fs_vfs_getattr, 16309b6533c9SSripathi Kodi .setattr = v9fs_vfs_setattr, 16319b6533c9SSripathi Kodi }; 16329b6533c9SSripathi Kodi 16339b6533c9SSripathi Kodi static const struct inode_operations v9fs_dir_inode_operations_dotl = { 16342bad8471SEric Van Hensbergen .create = v9fs_vfs_create, 16352bad8471SEric Van Hensbergen .lookup = v9fs_vfs_lookup, 163650cc42ffSVenkateswararao Jujjuri (JV) .link = v9fs_vfs_link_dotl, 163750cc42ffSVenkateswararao Jujjuri (JV) .symlink = v9fs_vfs_symlink_dotl, 16382bad8471SEric Van Hensbergen .unlink = v9fs_vfs_unlink, 16392bad8471SEric Van Hensbergen .mkdir = v9fs_vfs_mkdir, 16402bad8471SEric Van Hensbergen .rmdir = v9fs_vfs_rmdir, 16412bad8471SEric Van Hensbergen .mknod = v9fs_vfs_mknod, 16422bad8471SEric Van Hensbergen .rename = v9fs_vfs_rename, 1643f0853122SSripathi Kodi .getattr = v9fs_vfs_getattr_dotl, 164487d7845aSSripathi Kodi .setattr = v9fs_vfs_setattr_dotl, 16452bad8471SEric Van Hensbergen }; 16462bad8471SEric Van Hensbergen 1647754661f1SArjan van de Ven static const struct inode_operations v9fs_dir_inode_operations = { 1648b501611aSEric Van Hensbergen .create = v9fs_vfs_create, 1649b501611aSEric Van Hensbergen .lookup = v9fs_vfs_lookup, 1650b501611aSEric Van Hensbergen .unlink = v9fs_vfs_unlink, 1651b501611aSEric Van Hensbergen .mkdir = v9fs_vfs_mkdir, 1652b501611aSEric Van Hensbergen .rmdir = v9fs_vfs_rmdir, 1653b501611aSEric Van Hensbergen .mknod = v9fs_vfs_mknod, 1654b501611aSEric Van Hensbergen .rename = v9fs_vfs_rename, 1655b501611aSEric Van Hensbergen .getattr = v9fs_vfs_getattr, 1656b501611aSEric Van Hensbergen .setattr = v9fs_vfs_setattr, 1657b501611aSEric Van Hensbergen }; 1658b501611aSEric Van Hensbergen 1659754661f1SArjan van de Ven static const struct inode_operations v9fs_file_inode_operations = { 16602bad8471SEric Van Hensbergen .getattr = v9fs_vfs_getattr, 16612bad8471SEric Van Hensbergen .setattr = v9fs_vfs_setattr, 16622bad8471SEric Van Hensbergen }; 16632bad8471SEric Van Hensbergen 16649b6533c9SSripathi Kodi static const struct inode_operations v9fs_file_inode_operations_dotl = { 1665f0853122SSripathi Kodi .getattr = v9fs_vfs_getattr_dotl, 166687d7845aSSripathi Kodi .setattr = v9fs_vfs_setattr_dotl, 16679b6533c9SSripathi Kodi }; 16689b6533c9SSripathi Kodi 1669754661f1SArjan van de Ven static const struct inode_operations v9fs_symlink_inode_operations = { 1670204f2f0eSAl Viro .readlink = generic_readlink, 16712bad8471SEric Van Hensbergen .follow_link = v9fs_vfs_follow_link, 16722bad8471SEric Van Hensbergen .put_link = v9fs_vfs_put_link, 16732bad8471SEric Van Hensbergen .getattr = v9fs_vfs_getattr, 16742bad8471SEric Van Hensbergen .setattr = v9fs_vfs_setattr, 16752bad8471SEric Van Hensbergen }; 16769b6533c9SSripathi Kodi 16779b6533c9SSripathi Kodi static const struct inode_operations v9fs_symlink_inode_operations_dotl = { 16789b6533c9SSripathi Kodi .readlink = generic_readlink, 16799b6533c9SSripathi Kodi .follow_link = v9fs_vfs_follow_link, 16809b6533c9SSripathi Kodi .put_link = v9fs_vfs_put_link, 1681f0853122SSripathi Kodi .getattr = v9fs_vfs_getattr_dotl, 168287d7845aSSripathi Kodi .setattr = v9fs_vfs_setattr_dotl, 16839b6533c9SSripathi Kodi }; 1684