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> 37bd238fb4SLatchesar Ionkov #include <net/9p/9p.h> 38bd238fb4SLatchesar Ionkov #include <net/9p/client.h> 392bad8471SEric Van Hensbergen 402bad8471SEric Van Hensbergen #include "v9fs.h" 412bad8471SEric Van Hensbergen #include "v9fs_vfs.h" 422bad8471SEric Van Hensbergen #include "fid.h" 4360e78d2cSAbhishek Kulkarni #include "cache.h" 442bad8471SEric Van Hensbergen 45754661f1SArjan van de Ven static const struct inode_operations v9fs_dir_inode_operations; 46754661f1SArjan van de Ven static const struct inode_operations v9fs_dir_inode_operations_ext; 47754661f1SArjan van de Ven static const struct inode_operations v9fs_file_inode_operations; 48754661f1SArjan van de Ven static const struct inode_operations v9fs_symlink_inode_operations; 492bad8471SEric Van Hensbergen 502bad8471SEric Van Hensbergen /** 512bad8471SEric Van Hensbergen * unixmode2p9mode - convert unix mode bits to plan 9 522bad8471SEric Van Hensbergen * @v9ses: v9fs session information 532bad8471SEric Van Hensbergen * @mode: mode to convert 542bad8471SEric Van Hensbergen * 552bad8471SEric Van Hensbergen */ 562bad8471SEric Van Hensbergen 5773c592b9SEric Van Hensbergen static int unixmode2p9mode(struct v9fs_session_info *v9ses, int mode) 582bad8471SEric Van Hensbergen { 592bad8471SEric Van Hensbergen int res; 602bad8471SEric Van Hensbergen res = mode & 0777; 612bad8471SEric Van Hensbergen if (S_ISDIR(mode)) 62bd238fb4SLatchesar Ionkov res |= P9_DMDIR; 63dd6102fbSSripathi Kodi if (v9fs_proto_dotu(v9ses)) { 642bad8471SEric Van Hensbergen if (S_ISLNK(mode)) 65bd238fb4SLatchesar Ionkov res |= P9_DMSYMLINK; 662bad8471SEric Van Hensbergen if (v9ses->nodev == 0) { 672bad8471SEric Van Hensbergen if (S_ISSOCK(mode)) 68bd238fb4SLatchesar Ionkov res |= P9_DMSOCKET; 692bad8471SEric Van Hensbergen if (S_ISFIFO(mode)) 70bd238fb4SLatchesar Ionkov res |= P9_DMNAMEDPIPE; 712bad8471SEric Van Hensbergen if (S_ISBLK(mode)) 72bd238fb4SLatchesar Ionkov res |= P9_DMDEVICE; 732bad8471SEric Van Hensbergen if (S_ISCHR(mode)) 74bd238fb4SLatchesar Ionkov res |= P9_DMDEVICE; 752bad8471SEric Van Hensbergen } 762bad8471SEric Van Hensbergen 772bad8471SEric Van Hensbergen if ((mode & S_ISUID) == S_ISUID) 78bd238fb4SLatchesar Ionkov res |= P9_DMSETUID; 792bad8471SEric Van Hensbergen if ((mode & S_ISGID) == S_ISGID) 80bd238fb4SLatchesar Ionkov res |= P9_DMSETGID; 81d199d652SAnthony Liguori if ((mode & S_ISVTX) == S_ISVTX) 82d199d652SAnthony Liguori res |= P9_DMSETVTX; 83bd238fb4SLatchesar Ionkov if ((mode & P9_DMLINK)) 84bd238fb4SLatchesar Ionkov res |= P9_DMLINK; 852bad8471SEric Van Hensbergen } 862bad8471SEric Van Hensbergen 872bad8471SEric Van Hensbergen return res; 882bad8471SEric Van Hensbergen } 892bad8471SEric Van Hensbergen 902bad8471SEric Van Hensbergen /** 912bad8471SEric Van Hensbergen * p9mode2unixmode- convert plan9 mode bits to unix mode bits 922bad8471SEric Van Hensbergen * @v9ses: v9fs session information 932bad8471SEric Van Hensbergen * @mode: mode to convert 942bad8471SEric Van Hensbergen * 952bad8471SEric Van Hensbergen */ 962bad8471SEric Van Hensbergen 9773c592b9SEric Van Hensbergen static int p9mode2unixmode(struct v9fs_session_info *v9ses, int mode) 982bad8471SEric Van Hensbergen { 992bad8471SEric Van Hensbergen int res; 1002bad8471SEric Van Hensbergen 1012bad8471SEric Van Hensbergen res = mode & 0777; 1022bad8471SEric Van Hensbergen 103bd238fb4SLatchesar Ionkov if ((mode & P9_DMDIR) == P9_DMDIR) 1042bad8471SEric Van Hensbergen res |= S_IFDIR; 105dd6102fbSSripathi Kodi else if ((mode & P9_DMSYMLINK) && (v9fs_proto_dotu(v9ses))) 1062bad8471SEric Van Hensbergen res |= S_IFLNK; 107dd6102fbSSripathi Kodi else if ((mode & P9_DMSOCKET) && (v9fs_proto_dotu(v9ses)) 1082bad8471SEric Van Hensbergen && (v9ses->nodev == 0)) 1092bad8471SEric Van Hensbergen res |= S_IFSOCK; 110dd6102fbSSripathi Kodi else if ((mode & P9_DMNAMEDPIPE) && (v9fs_proto_dotu(v9ses)) 1112bad8471SEric Van Hensbergen && (v9ses->nodev == 0)) 1122bad8471SEric Van Hensbergen res |= S_IFIFO; 113dd6102fbSSripathi Kodi else if ((mode & P9_DMDEVICE) && (v9fs_proto_dotu(v9ses)) 1142bad8471SEric Van Hensbergen && (v9ses->nodev == 0)) 1152bad8471SEric Van Hensbergen res |= S_IFBLK; 1162bad8471SEric Van Hensbergen else 1172bad8471SEric Van Hensbergen res |= S_IFREG; 1182bad8471SEric Van Hensbergen 119dd6102fbSSripathi Kodi if (v9fs_proto_dotu(v9ses)) { 120bd238fb4SLatchesar Ionkov if ((mode & P9_DMSETUID) == P9_DMSETUID) 1212bad8471SEric Van Hensbergen res |= S_ISUID; 1222bad8471SEric Van Hensbergen 123bd238fb4SLatchesar Ionkov if ((mode & P9_DMSETGID) == P9_DMSETGID) 1242bad8471SEric Van Hensbergen res |= S_ISGID; 125d199d652SAnthony Liguori 126d199d652SAnthony Liguori if ((mode & P9_DMSETVTX) == P9_DMSETVTX) 127d199d652SAnthony Liguori res |= S_ISVTX; 1282bad8471SEric Van Hensbergen } 1292bad8471SEric Van Hensbergen 1302bad8471SEric Van Hensbergen return res; 1312bad8471SEric Van Hensbergen } 1322bad8471SEric Van Hensbergen 133ee443996SEric Van Hensbergen /** 134ee443996SEric Van Hensbergen * v9fs_uflags2omode- convert posix open flags to plan 9 mode bits 135ee443996SEric Van Hensbergen * @uflags: flags to convert 1362e4bef41SEric Van Hensbergen * @extended: if .u extensions are active 137ee443996SEric Van Hensbergen */ 138ee443996SEric Van Hensbergen 1392e4bef41SEric Van Hensbergen int v9fs_uflags2omode(int uflags, int extended) 1406a3124a3SLatchesar Ionkov { 1416a3124a3SLatchesar Ionkov int ret; 1426a3124a3SLatchesar Ionkov 1436a3124a3SLatchesar Ionkov ret = 0; 1446a3124a3SLatchesar Ionkov switch (uflags&3) { 1456a3124a3SLatchesar Ionkov default: 1466a3124a3SLatchesar Ionkov case O_RDONLY: 147bd238fb4SLatchesar Ionkov ret = P9_OREAD; 1486a3124a3SLatchesar Ionkov break; 1496a3124a3SLatchesar Ionkov 1506a3124a3SLatchesar Ionkov case O_WRONLY: 151bd238fb4SLatchesar Ionkov ret = P9_OWRITE; 1526a3124a3SLatchesar Ionkov break; 1536a3124a3SLatchesar Ionkov 1546a3124a3SLatchesar Ionkov case O_RDWR: 155bd238fb4SLatchesar Ionkov ret = P9_ORDWR; 1566a3124a3SLatchesar Ionkov break; 1576a3124a3SLatchesar Ionkov } 1586a3124a3SLatchesar Ionkov 1596a3124a3SLatchesar Ionkov if (uflags & O_TRUNC) 160bd238fb4SLatchesar Ionkov ret |= P9_OTRUNC; 1616a3124a3SLatchesar Ionkov 1622e4bef41SEric Van Hensbergen if (extended) { 1632e4bef41SEric Van Hensbergen if (uflags & O_EXCL) 1642e4bef41SEric Van Hensbergen ret |= P9_OEXCL; 1652e4bef41SEric Van Hensbergen 1666a3124a3SLatchesar Ionkov if (uflags & O_APPEND) 167bd238fb4SLatchesar Ionkov ret |= P9_OAPPEND; 1682e4bef41SEric Van Hensbergen } 1696a3124a3SLatchesar Ionkov 1706a3124a3SLatchesar Ionkov return ret; 1716a3124a3SLatchesar Ionkov } 1726a3124a3SLatchesar Ionkov 1732bad8471SEric Van Hensbergen /** 174531b1094SLatchesar Ionkov * v9fs_blank_wstat - helper function to setup a 9P stat structure 175531b1094SLatchesar Ionkov * @wstat: structure to initialize 1762bad8471SEric Van Hensbergen * 1772bad8471SEric Van Hensbergen */ 1782bad8471SEric Van Hensbergen 1797a4439c4SM. Mohan Kumar void 180bd238fb4SLatchesar Ionkov v9fs_blank_wstat(struct p9_wstat *wstat) 1812bad8471SEric Van Hensbergen { 182531b1094SLatchesar Ionkov wstat->type = ~0; 183531b1094SLatchesar Ionkov wstat->dev = ~0; 184531b1094SLatchesar Ionkov wstat->qid.type = ~0; 185531b1094SLatchesar Ionkov wstat->qid.version = ~0; 186531b1094SLatchesar Ionkov *((long long *)&wstat->qid.path) = ~0; 187531b1094SLatchesar Ionkov wstat->mode = ~0; 188531b1094SLatchesar Ionkov wstat->atime = ~0; 189531b1094SLatchesar Ionkov wstat->mtime = ~0; 190531b1094SLatchesar Ionkov wstat->length = ~0; 191531b1094SLatchesar Ionkov wstat->name = NULL; 192531b1094SLatchesar Ionkov wstat->uid = NULL; 193531b1094SLatchesar Ionkov wstat->gid = NULL; 194531b1094SLatchesar Ionkov wstat->muid = NULL; 195531b1094SLatchesar Ionkov wstat->n_uid = ~0; 196531b1094SLatchesar Ionkov wstat->n_gid = ~0; 197531b1094SLatchesar Ionkov wstat->n_muid = ~0; 198531b1094SLatchesar Ionkov wstat->extension = NULL; 1992bad8471SEric Van Hensbergen } 2002bad8471SEric Van Hensbergen 20160e78d2cSAbhishek Kulkarni #ifdef CONFIG_9P_FSCACHE 20260e78d2cSAbhishek Kulkarni /** 20360e78d2cSAbhishek Kulkarni * v9fs_alloc_inode - helper function to allocate an inode 20460e78d2cSAbhishek Kulkarni * This callback is executed before setting up the inode so that we 20560e78d2cSAbhishek Kulkarni * can associate a vcookie with each inode. 20660e78d2cSAbhishek Kulkarni * 20760e78d2cSAbhishek Kulkarni */ 20860e78d2cSAbhishek Kulkarni 20960e78d2cSAbhishek Kulkarni struct inode *v9fs_alloc_inode(struct super_block *sb) 21060e78d2cSAbhishek Kulkarni { 21160e78d2cSAbhishek Kulkarni struct v9fs_cookie *vcookie; 21260e78d2cSAbhishek Kulkarni vcookie = (struct v9fs_cookie *)kmem_cache_alloc(vcookie_cache, 21360e78d2cSAbhishek Kulkarni GFP_KERNEL); 21460e78d2cSAbhishek Kulkarni if (!vcookie) 21560e78d2cSAbhishek Kulkarni return NULL; 21660e78d2cSAbhishek Kulkarni 21760e78d2cSAbhishek Kulkarni vcookie->fscache = NULL; 21860e78d2cSAbhishek Kulkarni vcookie->qid = NULL; 21960e78d2cSAbhishek Kulkarni spin_lock_init(&vcookie->lock); 22060e78d2cSAbhishek Kulkarni return &vcookie->inode; 22160e78d2cSAbhishek Kulkarni } 22260e78d2cSAbhishek Kulkarni 22360e78d2cSAbhishek Kulkarni /** 22460e78d2cSAbhishek Kulkarni * v9fs_destroy_inode - destroy an inode 22560e78d2cSAbhishek Kulkarni * 22660e78d2cSAbhishek Kulkarni */ 22760e78d2cSAbhishek Kulkarni 22860e78d2cSAbhishek Kulkarni void v9fs_destroy_inode(struct inode *inode) 22960e78d2cSAbhishek Kulkarni { 23060e78d2cSAbhishek Kulkarni kmem_cache_free(vcookie_cache, v9fs_inode2cookie(inode)); 23160e78d2cSAbhishek Kulkarni } 23260e78d2cSAbhishek Kulkarni #endif 23360e78d2cSAbhishek Kulkarni 2342bad8471SEric Van Hensbergen /** 2352bad8471SEric Van Hensbergen * v9fs_get_inode - helper function to setup an inode 2362bad8471SEric Van Hensbergen * @sb: superblock 2372bad8471SEric Van Hensbergen * @mode: mode to setup inode with 2382bad8471SEric Van Hensbergen * 2392bad8471SEric Van Hensbergen */ 2402bad8471SEric Van Hensbergen 2412bad8471SEric Van Hensbergen struct inode *v9fs_get_inode(struct super_block *sb, int mode) 2422bad8471SEric Van Hensbergen { 2432bb54115SAbhishek Kulkarni int err; 2446a3124a3SLatchesar Ionkov struct inode *inode; 245b501611aSEric Van Hensbergen struct v9fs_session_info *v9ses = sb->s_fs_info; 2462bad8471SEric Van Hensbergen 247bd238fb4SLatchesar Ionkov P9_DPRINTK(P9_DEBUG_VFS, "super block: %p mode: %o\n", sb, mode); 2482bad8471SEric Van Hensbergen 2492bad8471SEric Van Hensbergen inode = new_inode(sb); 2502bb54115SAbhishek Kulkarni if (!inode) { 2512bb54115SAbhishek Kulkarni P9_EPRINTK(KERN_WARNING, "Problem allocating inode\n"); 25248559b4cSAbhishek Kulkarni return ERR_PTR(-ENOMEM); 2532bb54115SAbhishek Kulkarni } 2542bb54115SAbhishek Kulkarni 2552bad8471SEric Van Hensbergen inode->i_mode = mode; 256f8b9d53aSDavid Howells inode->i_uid = current_fsuid(); 257f8b9d53aSDavid Howells inode->i_gid = current_fsgid(); 2582bad8471SEric Van Hensbergen inode->i_blocks = 0; 2592bad8471SEric Van Hensbergen inode->i_rdev = 0; 2602bad8471SEric Van Hensbergen inode->i_atime = inode->i_mtime = inode->i_ctime = CURRENT_TIME; 261147b31cfSEric Van Hensbergen inode->i_mapping->a_ops = &v9fs_addr_operations; 2622bad8471SEric Van Hensbergen 2632bad8471SEric Van Hensbergen switch (mode & S_IFMT) { 2642bad8471SEric Van Hensbergen case S_IFIFO: 2652bad8471SEric Van Hensbergen case S_IFBLK: 2662bad8471SEric Van Hensbergen case S_IFCHR: 2672bad8471SEric Van Hensbergen case S_IFSOCK: 268dd6102fbSSripathi Kodi if (!v9fs_proto_dotu(v9ses)) { 269bd238fb4SLatchesar Ionkov P9_DPRINTK(P9_DEBUG_ERROR, 270bd238fb4SLatchesar Ionkov "special files without extended mode\n"); 2712bb54115SAbhishek Kulkarni err = -EINVAL; 2722bb54115SAbhishek Kulkarni goto error; 273b501611aSEric Van Hensbergen } 2742bb54115SAbhishek Kulkarni init_special_inode(inode, inode->i_mode, inode->i_rdev); 2755d58bec5SEric Van Hensbergen break; 2762bad8471SEric Van Hensbergen case S_IFREG: 2772bad8471SEric Van Hensbergen inode->i_op = &v9fs_file_inode_operations; 2782bad8471SEric Van Hensbergen inode->i_fop = &v9fs_file_operations; 2792bad8471SEric Van Hensbergen break; 280b501611aSEric Van Hensbergen case S_IFLNK: 281dd6102fbSSripathi Kodi if (!v9fs_proto_dotu(v9ses)) { 282bd238fb4SLatchesar Ionkov P9_DPRINTK(P9_DEBUG_ERROR, 283bd238fb4SLatchesar Ionkov "extended modes used w/o 9P2000.u\n"); 2842bb54115SAbhishek Kulkarni err = -EINVAL; 2852bb54115SAbhishek Kulkarni goto error; 286b501611aSEric Van Hensbergen } 287b501611aSEric Van Hensbergen inode->i_op = &v9fs_symlink_inode_operations; 288b501611aSEric Van Hensbergen break; 2892bad8471SEric Van Hensbergen case S_IFDIR: 290d8c76e6fSDave Hansen inc_nlink(inode); 291dd6102fbSSripathi Kodi if (v9fs_proto_dotu(v9ses)) 292b501611aSEric Van Hensbergen inode->i_op = &v9fs_dir_inode_operations_ext; 293b501611aSEric Van Hensbergen else 2942bad8471SEric Van Hensbergen inode->i_op = &v9fs_dir_inode_operations; 2952bad8471SEric Van Hensbergen inode->i_fop = &v9fs_dir_operations; 2962bad8471SEric Van Hensbergen break; 2972bad8471SEric Van Hensbergen default: 2982bb54115SAbhishek Kulkarni P9_DPRINTK(P9_DEBUG_ERROR, "BAD mode 0x%x S_IFMT 0x%x\n", 2992bad8471SEric Van Hensbergen mode, mode & S_IFMT); 3002bb54115SAbhishek Kulkarni err = -EINVAL; 3012bb54115SAbhishek Kulkarni goto error; 3022bad8471SEric Van Hensbergen } 3032bb54115SAbhishek Kulkarni 3042bad8471SEric Van Hensbergen return inode; 3052bb54115SAbhishek Kulkarni 3062bb54115SAbhishek Kulkarni error: 3072bb54115SAbhishek Kulkarni iput(inode); 3082bb54115SAbhishek Kulkarni return ERR_PTR(err); 3092bad8471SEric Van Hensbergen } 3102bad8471SEric Van Hensbergen 311bd238fb4SLatchesar Ionkov /* 3126a3124a3SLatchesar Ionkov static struct v9fs_fid* 3136a3124a3SLatchesar Ionkov v9fs_clone_walk(struct v9fs_session_info *v9ses, u32 fid, struct dentry *dentry) 3146a3124a3SLatchesar Ionkov { 3156a3124a3SLatchesar Ionkov int err; 316736c4b85SMika Kukkonen int nfid; 3176a3124a3SLatchesar Ionkov struct v9fs_fid *ret; 3186a3124a3SLatchesar Ionkov struct v9fs_fcall *fcall; 3190b8dd177SLatchesar Ionkov 3206a3124a3SLatchesar Ionkov nfid = v9fs_get_idpool(&v9ses->fidpool); 3216a3124a3SLatchesar Ionkov if (nfid < 0) { 3220b8dd177SLatchesar Ionkov eprintk(KERN_WARNING, "no free fids available\n"); 323731805b4SLatchesar Ionkov return ERR_PTR(-ENOSPC); 3240b8dd177SLatchesar Ionkov } 3250b8dd177SLatchesar Ionkov 3266a3124a3SLatchesar Ionkov err = v9fs_t_walk(v9ses, fid, nfid, (char *) dentry->d_name.name, 3276a3124a3SLatchesar Ionkov &fcall); 3286a3124a3SLatchesar Ionkov 3296a3124a3SLatchesar Ionkov if (err < 0) { 33041e5a6acSLatchesar Ionkov if (fcall && fcall->id == RWALK) 33141e5a6acSLatchesar Ionkov goto clunk_fid; 33241e5a6acSLatchesar Ionkov 3336a3124a3SLatchesar Ionkov PRINT_FCALL_ERROR("walk error", fcall); 3346a3124a3SLatchesar Ionkov v9fs_put_idpool(nfid, &v9ses->fidpool); 3356a3124a3SLatchesar Ionkov goto error; 3360b8dd177SLatchesar Ionkov } 3376a3124a3SLatchesar Ionkov 3383cf6429aSLatchesar Ionkov kfree(fcall); 3393cf6429aSLatchesar Ionkov fcall = NULL; 3406a3124a3SLatchesar Ionkov ret = v9fs_fid_create(v9ses, nfid); 3416a3124a3SLatchesar Ionkov if (!ret) { 3426a3124a3SLatchesar Ionkov err = -ENOMEM; 3436a3124a3SLatchesar Ionkov goto clunk_fid; 3440b8dd177SLatchesar Ionkov } 3452bad8471SEric Van Hensbergen 3466a3124a3SLatchesar Ionkov err = v9fs_fid_insert(ret, dentry); 3476a3124a3SLatchesar Ionkov if (err < 0) { 3486a3124a3SLatchesar Ionkov v9fs_fid_destroy(ret); 3496a3124a3SLatchesar Ionkov goto clunk_fid; 3506a3124a3SLatchesar Ionkov } 3512bad8471SEric Van Hensbergen 3526a3124a3SLatchesar Ionkov return ret; 3536a3124a3SLatchesar Ionkov 3546a3124a3SLatchesar Ionkov clunk_fid: 3556a3124a3SLatchesar Ionkov v9fs_t_clunk(v9ses, nfid); 3566a3124a3SLatchesar Ionkov 3576a3124a3SLatchesar Ionkov error: 3586a3124a3SLatchesar Ionkov kfree(fcall); 3596a3124a3SLatchesar Ionkov return ERR_PTR(err); 3606a3124a3SLatchesar Ionkov } 361bd238fb4SLatchesar Ionkov */ 3626a3124a3SLatchesar Ionkov 36360e78d2cSAbhishek Kulkarni 36460e78d2cSAbhishek Kulkarni /** 36560e78d2cSAbhishek Kulkarni * v9fs_clear_inode - release an inode 36660e78d2cSAbhishek Kulkarni * @inode: inode to release 36760e78d2cSAbhishek Kulkarni * 36860e78d2cSAbhishek Kulkarni */ 36960e78d2cSAbhishek Kulkarni void v9fs_clear_inode(struct inode *inode) 37060e78d2cSAbhishek Kulkarni { 37160e78d2cSAbhishek Kulkarni filemap_fdatawrite(inode->i_mapping); 37260e78d2cSAbhishek Kulkarni 37360e78d2cSAbhishek Kulkarni #ifdef CONFIG_9P_FSCACHE 37460e78d2cSAbhishek Kulkarni v9fs_cache_inode_put_cookie(inode); 37560e78d2cSAbhishek Kulkarni #endif 37660e78d2cSAbhishek Kulkarni } 37760e78d2cSAbhishek Kulkarni 378ee443996SEric Van Hensbergen /** 379ee443996SEric Van Hensbergen * v9fs_inode_from_fid - populate an inode by issuing a attribute request 380ee443996SEric Van Hensbergen * @v9ses: session information 381ee443996SEric Van Hensbergen * @fid: fid to issue attribute request for 382ee443996SEric Van Hensbergen * @sb: superblock on which to create inode 383ee443996SEric Van Hensbergen * 384ee443996SEric Van Hensbergen */ 385ee443996SEric Van Hensbergen 3865174fdabSLatchesar Ionkov static struct inode * 387bd238fb4SLatchesar Ionkov v9fs_inode_from_fid(struct v9fs_session_info *v9ses, struct p9_fid *fid, 3886a3124a3SLatchesar Ionkov struct super_block *sb) 3896a3124a3SLatchesar Ionkov { 3906a3124a3SLatchesar Ionkov int err, umode; 3916a3124a3SLatchesar Ionkov struct inode *ret; 39251a87c55SEric Van Hensbergen struct p9_wstat *st; 3936a3124a3SLatchesar Ionkov 3946a3124a3SLatchesar Ionkov ret = NULL; 395bd238fb4SLatchesar Ionkov st = p9_client_stat(fid); 39602bc3567SAbhishek Kulkarni if (IS_ERR(st)) 39702bc3567SAbhishek Kulkarni return ERR_CAST(st); 3982bad8471SEric Van Hensbergen 399bd238fb4SLatchesar Ionkov umode = p9mode2unixmode(v9ses, st->mode); 4006a3124a3SLatchesar Ionkov ret = v9fs_get_inode(sb, umode); 4016a3124a3SLatchesar Ionkov if (IS_ERR(ret)) { 4026a3124a3SLatchesar Ionkov err = PTR_ERR(ret); 4036a3124a3SLatchesar Ionkov goto error; 4042bad8471SEric Van Hensbergen } 4052bad8471SEric Van Hensbergen 406bd238fb4SLatchesar Ionkov v9fs_stat2inode(st, ret, sb); 407bd238fb4SLatchesar Ionkov ret->i_ino = v9fs_qid2ino(&st->qid); 40860e78d2cSAbhishek Kulkarni 40960e78d2cSAbhishek Kulkarni #ifdef CONFIG_9P_FSCACHE 41060e78d2cSAbhishek Kulkarni v9fs_vcookie_set_qid(ret, &st->qid); 41160e78d2cSAbhishek Kulkarni v9fs_cache_inode_get_cookie(ret); 41260e78d2cSAbhishek Kulkarni #endif 41302bc3567SAbhishek Kulkarni p9stat_free(st); 414bd238fb4SLatchesar Ionkov kfree(st); 41560e78d2cSAbhishek Kulkarni 4166a3124a3SLatchesar Ionkov return ret; 4172bad8471SEric Van Hensbergen 4186a3124a3SLatchesar Ionkov error: 41902bc3567SAbhishek Kulkarni p9stat_free(st); 420bd238fb4SLatchesar Ionkov kfree(st); 4216a3124a3SLatchesar Ionkov return ERR_PTR(err); 4222bad8471SEric Van Hensbergen } 4232bad8471SEric Van Hensbergen 4242bad8471SEric Van Hensbergen /** 4252bad8471SEric Van Hensbergen * v9fs_remove - helper function to remove files and directories 42673c592b9SEric Van Hensbergen * @dir: directory inode that is being deleted 42773c592b9SEric Van Hensbergen * @file: dentry that is being deleted 42873c592b9SEric Van Hensbergen * @rmdir: removing a directory 4292bad8471SEric Van Hensbergen * 4302bad8471SEric Van Hensbergen */ 4312bad8471SEric Van Hensbergen 4322bad8471SEric Van Hensbergen static int v9fs_remove(struct inode *dir, struct dentry *file, int rmdir) 4332bad8471SEric Van Hensbergen { 434d994f405SAneesh Kumar K.V int retval; 435bd238fb4SLatchesar Ionkov struct inode *file_inode; 436bd238fb4SLatchesar Ionkov struct v9fs_session_info *v9ses; 437bd238fb4SLatchesar Ionkov struct p9_fid *v9fid; 4382bad8471SEric Van Hensbergen 439bd238fb4SLatchesar Ionkov P9_DPRINTK(P9_DEBUG_VFS, "inode: %p dentry: %p rmdir: %d\n", dir, file, 4402bad8471SEric Van Hensbergen rmdir); 4412bad8471SEric Van Hensbergen 4422bad8471SEric Van Hensbergen file_inode = file->d_inode; 4432bad8471SEric Van Hensbergen v9ses = v9fs_inode2v9ses(file_inode); 444c959df9fSLatchesar Ionkov v9fid = v9fs_fid_clone(file); 445da977b2cSEric Van Hensbergen if (IS_ERR(v9fid)) 446da977b2cSEric Van Hensbergen return PTR_ERR(v9fid); 4472bad8471SEric Van Hensbergen 448d994f405SAneesh Kumar K.V retval = p9_client_remove(v9fid); 449d994f405SAneesh Kumar K.V if (!retval) 450d994f405SAneesh Kumar K.V drop_nlink(file_inode); 451d994f405SAneesh Kumar K.V return retval; 4522bad8471SEric Van Hensbergen } 4532bad8471SEric Van Hensbergen 4546a3124a3SLatchesar Ionkov static int 4556a3124a3SLatchesar Ionkov v9fs_open_created(struct inode *inode, struct file *file) 4566a3124a3SLatchesar Ionkov { 4576a3124a3SLatchesar Ionkov return 0; 4586a3124a3SLatchesar Ionkov } 4596a3124a3SLatchesar Ionkov 460bd238fb4SLatchesar Ionkov 461bd238fb4SLatchesar Ionkov /** 462bd238fb4SLatchesar Ionkov * v9fs_create - Create a file 463ee443996SEric Van Hensbergen * @v9ses: session information 464ee443996SEric Van Hensbergen * @dir: directory that dentry is being created in 465bd238fb4SLatchesar Ionkov * @dentry: dentry that is being created 4660e15597eSAbhishek Kulkarni * @extension: 9p2000.u extension string to support devices, etc. 467bd238fb4SLatchesar Ionkov * @perm: create permissions 468bd238fb4SLatchesar Ionkov * @mode: open mode 469bd238fb4SLatchesar Ionkov * 470bd238fb4SLatchesar Ionkov */ 471bd238fb4SLatchesar Ionkov static struct p9_fid * 472bd238fb4SLatchesar Ionkov v9fs_create(struct v9fs_session_info *v9ses, struct inode *dir, 473bd238fb4SLatchesar Ionkov struct dentry *dentry, char *extension, u32 perm, u8 mode) 474bd238fb4SLatchesar Ionkov { 475bd238fb4SLatchesar Ionkov int err; 476bd238fb4SLatchesar Ionkov char *name; 477bd238fb4SLatchesar Ionkov struct p9_fid *dfid, *ofid, *fid; 478bd238fb4SLatchesar Ionkov struct inode *inode; 479bd238fb4SLatchesar Ionkov 48051a87c55SEric Van Hensbergen P9_DPRINTK(P9_DEBUG_VFS, "name %s\n", dentry->d_name.name); 48151a87c55SEric Van Hensbergen 482bd238fb4SLatchesar Ionkov err = 0; 483bd238fb4SLatchesar Ionkov ofid = NULL; 484bd238fb4SLatchesar Ionkov fid = NULL; 485bd238fb4SLatchesar Ionkov name = (char *) dentry->d_name.name; 486bd238fb4SLatchesar Ionkov dfid = v9fs_fid_clone(dentry->d_parent); 487bd238fb4SLatchesar Ionkov if (IS_ERR(dfid)) { 488bd238fb4SLatchesar Ionkov err = PTR_ERR(dfid); 48951a87c55SEric Van Hensbergen P9_DPRINTK(P9_DEBUG_VFS, "fid clone failed %d\n", err); 490bd238fb4SLatchesar Ionkov dfid = NULL; 491bd238fb4SLatchesar Ionkov goto error; 492bd238fb4SLatchesar Ionkov } 493bd238fb4SLatchesar Ionkov 494bd238fb4SLatchesar Ionkov /* clone a fid to use for creation */ 495bd238fb4SLatchesar Ionkov ofid = p9_client_walk(dfid, 0, NULL, 1); 496bd238fb4SLatchesar Ionkov if (IS_ERR(ofid)) { 497bd238fb4SLatchesar Ionkov err = PTR_ERR(ofid); 49851a87c55SEric Van Hensbergen P9_DPRINTK(P9_DEBUG_VFS, "p9_client_walk failed %d\n", err); 499bd238fb4SLatchesar Ionkov ofid = NULL; 500bd238fb4SLatchesar Ionkov goto error; 501bd238fb4SLatchesar Ionkov } 502bd238fb4SLatchesar Ionkov 503bd238fb4SLatchesar Ionkov err = p9_client_fcreate(ofid, name, perm, mode, extension); 50451a87c55SEric Van Hensbergen if (err < 0) { 50551a87c55SEric Van Hensbergen P9_DPRINTK(P9_DEBUG_VFS, "p9_client_fcreate failed %d\n", err); 506bd238fb4SLatchesar Ionkov goto error; 50751a87c55SEric Van Hensbergen } 508bd238fb4SLatchesar Ionkov 509bd238fb4SLatchesar Ionkov /* now walk from the parent so we can get unopened fid */ 510bd238fb4SLatchesar Ionkov fid = p9_client_walk(dfid, 1, &name, 0); 511bd238fb4SLatchesar Ionkov if (IS_ERR(fid)) { 512bd238fb4SLatchesar Ionkov err = PTR_ERR(fid); 51351a87c55SEric Van Hensbergen P9_DPRINTK(P9_DEBUG_VFS, "p9_client_walk failed %d\n", err); 514bd238fb4SLatchesar Ionkov fid = NULL; 515bd238fb4SLatchesar Ionkov goto error; 516bd238fb4SLatchesar Ionkov } else 517bd238fb4SLatchesar Ionkov dfid = NULL; 518bd238fb4SLatchesar Ionkov 519bd238fb4SLatchesar Ionkov /* instantiate inode and assign the unopened fid to the dentry */ 520bd238fb4SLatchesar Ionkov inode = v9fs_inode_from_fid(v9ses, fid, dir->i_sb); 521bd238fb4SLatchesar Ionkov if (IS_ERR(inode)) { 522bd238fb4SLatchesar Ionkov err = PTR_ERR(inode); 52351a87c55SEric Van Hensbergen P9_DPRINTK(P9_DEBUG_VFS, "inode creation failed %d\n", err); 524bd238fb4SLatchesar Ionkov goto error; 525bd238fb4SLatchesar Ionkov } 526bd238fb4SLatchesar Ionkov 527bd238fb4SLatchesar Ionkov if (v9ses->cache) 528bd238fb4SLatchesar Ionkov dentry->d_op = &v9fs_cached_dentry_operations; 529bd238fb4SLatchesar Ionkov else 530bd238fb4SLatchesar Ionkov dentry->d_op = &v9fs_dentry_operations; 531bd238fb4SLatchesar Ionkov 532bd238fb4SLatchesar Ionkov d_instantiate(dentry, inode); 53350fb6d2bSAbhishek Kulkarni err = v9fs_fid_add(dentry, fid); 53450fb6d2bSAbhishek Kulkarni if (err < 0) 53550fb6d2bSAbhishek Kulkarni goto error; 53650fb6d2bSAbhishek Kulkarni 537bd238fb4SLatchesar Ionkov return ofid; 538bd238fb4SLatchesar Ionkov 539bd238fb4SLatchesar Ionkov error: 540bd238fb4SLatchesar Ionkov if (dfid) 541bd238fb4SLatchesar Ionkov p9_client_clunk(dfid); 542bd238fb4SLatchesar Ionkov 543bd238fb4SLatchesar Ionkov if (ofid) 544bd238fb4SLatchesar Ionkov p9_client_clunk(ofid); 545bd238fb4SLatchesar Ionkov 546bd238fb4SLatchesar Ionkov if (fid) 547bd238fb4SLatchesar Ionkov p9_client_clunk(fid); 548bd238fb4SLatchesar Ionkov 549bd238fb4SLatchesar Ionkov return ERR_PTR(err); 550bd238fb4SLatchesar Ionkov } 551bd238fb4SLatchesar Ionkov 5522bad8471SEric Van Hensbergen /** 5532bad8471SEric Van Hensbergen * v9fs_vfs_create - VFS hook to create files 554ee443996SEric Van Hensbergen * @dir: directory inode that is being created 5552bad8471SEric Van Hensbergen * @dentry: dentry that is being deleted 5566a3124a3SLatchesar Ionkov * @mode: create permissions 5572bad8471SEric Van Hensbergen * @nd: path information 5582bad8471SEric Van Hensbergen * 5592bad8471SEric Van Hensbergen */ 5602bad8471SEric Van Hensbergen 5612bad8471SEric Van Hensbergen static int 5626a3124a3SLatchesar Ionkov v9fs_vfs_create(struct inode *dir, struct dentry *dentry, int mode, 5632bad8471SEric Van Hensbergen struct nameidata *nd) 5642bad8471SEric Van Hensbergen { 5656a3124a3SLatchesar Ionkov int err; 566bd238fb4SLatchesar Ionkov u32 perm; 5676a3124a3SLatchesar Ionkov int flags; 5686a3124a3SLatchesar Ionkov struct v9fs_session_info *v9ses; 569bd238fb4SLatchesar Ionkov struct p9_fid *fid; 5706a3124a3SLatchesar Ionkov struct file *filp; 5716a3124a3SLatchesar Ionkov 572bd238fb4SLatchesar Ionkov err = 0; 573bd238fb4SLatchesar Ionkov fid = NULL; 5746a3124a3SLatchesar Ionkov v9ses = v9fs_inode2v9ses(dir); 575da977b2cSEric Van Hensbergen perm = unixmode2p9mode(v9ses, mode); 5766a3124a3SLatchesar Ionkov if (nd && nd->flags & LOOKUP_OPEN) 5776a3124a3SLatchesar Ionkov flags = nd->intent.open.flags - 1; 5786a3124a3SLatchesar Ionkov else 5796a3124a3SLatchesar Ionkov flags = O_RDWR; 5806a3124a3SLatchesar Ionkov 581bd238fb4SLatchesar Ionkov fid = v9fs_create(v9ses, dir, dentry, NULL, perm, 582dd6102fbSSripathi Kodi v9fs_uflags2omode(flags, 583dd6102fbSSripathi Kodi v9fs_proto_dotu(v9ses))); 584bd238fb4SLatchesar Ionkov if (IS_ERR(fid)) { 585bd238fb4SLatchesar Ionkov err = PTR_ERR(fid); 586bd238fb4SLatchesar Ionkov fid = NULL; 5876a3124a3SLatchesar Ionkov goto error; 5886a3124a3SLatchesar Ionkov } 5896a3124a3SLatchesar Ionkov 590bd238fb4SLatchesar Ionkov /* if we are opening a file, assign the open fid to the file */ 5916a3124a3SLatchesar Ionkov if (nd && nd->flags & LOOKUP_OPEN) { 5926a3124a3SLatchesar Ionkov filp = lookup_instantiate_filp(nd, dentry, v9fs_open_created); 5936a3124a3SLatchesar Ionkov if (IS_ERR(filp)) { 594bd238fb4SLatchesar Ionkov err = PTR_ERR(filp); 595bd238fb4SLatchesar Ionkov goto error; 5966a3124a3SLatchesar Ionkov } 5976a3124a3SLatchesar Ionkov 598bd238fb4SLatchesar Ionkov filp->private_data = fid; 599bd238fb4SLatchesar Ionkov } else 600bd238fb4SLatchesar Ionkov p9_client_clunk(fid); 6016a3124a3SLatchesar Ionkov 6026a3124a3SLatchesar Ionkov return 0; 6036a3124a3SLatchesar Ionkov 6046a3124a3SLatchesar Ionkov error: 605bd238fb4SLatchesar Ionkov if (fid) 606bd238fb4SLatchesar Ionkov p9_client_clunk(fid); 6076a3124a3SLatchesar Ionkov 6086a3124a3SLatchesar Ionkov return err; 6092bad8471SEric Van Hensbergen } 6102bad8471SEric Van Hensbergen 6112bad8471SEric Van Hensbergen /** 6122bad8471SEric Van Hensbergen * v9fs_vfs_mkdir - VFS mkdir hook to create a directory 613ee443996SEric Van Hensbergen * @dir: inode that is being unlinked 6142bad8471SEric Van Hensbergen * @dentry: dentry that is being unlinked 6152bad8471SEric Van Hensbergen * @mode: mode for new directory 6162bad8471SEric Van Hensbergen * 6172bad8471SEric Van Hensbergen */ 6182bad8471SEric Van Hensbergen 6196a3124a3SLatchesar Ionkov static int v9fs_vfs_mkdir(struct inode *dir, struct dentry *dentry, int mode) 6202bad8471SEric Van Hensbergen { 6216a3124a3SLatchesar Ionkov int err; 622bd238fb4SLatchesar Ionkov u32 perm; 6236a3124a3SLatchesar Ionkov struct v9fs_session_info *v9ses; 624bd238fb4SLatchesar Ionkov struct p9_fid *fid; 6256a3124a3SLatchesar Ionkov 626bd238fb4SLatchesar Ionkov P9_DPRINTK(P9_DEBUG_VFS, "name %s\n", dentry->d_name.name); 627bd238fb4SLatchesar Ionkov err = 0; 6286a3124a3SLatchesar Ionkov v9ses = v9fs_inode2v9ses(dir); 6296a3124a3SLatchesar Ionkov perm = unixmode2p9mode(v9ses, mode | S_IFDIR); 630bd238fb4SLatchesar Ionkov fid = v9fs_create(v9ses, dir, dentry, NULL, perm, P9_OREAD); 631bd238fb4SLatchesar Ionkov if (IS_ERR(fid)) { 632bd238fb4SLatchesar Ionkov err = PTR_ERR(fid); 633bd238fb4SLatchesar Ionkov fid = NULL; 6346a3124a3SLatchesar Ionkov } 6356a3124a3SLatchesar Ionkov 636bd238fb4SLatchesar Ionkov if (fid) 637bd238fb4SLatchesar Ionkov p9_client_clunk(fid); 6386a3124a3SLatchesar Ionkov 6396a3124a3SLatchesar Ionkov return err; 6402bad8471SEric Van Hensbergen } 6412bad8471SEric Van Hensbergen 6422bad8471SEric Van Hensbergen /** 6432bad8471SEric Van Hensbergen * v9fs_vfs_lookup - VFS lookup hook to "walk" to a new inode 6442bad8471SEric Van Hensbergen * @dir: inode that is being walked from 6452bad8471SEric Van Hensbergen * @dentry: dentry that is being walked to? 6462bad8471SEric Van Hensbergen * @nameidata: path data 6472bad8471SEric Van Hensbergen * 6482bad8471SEric Van Hensbergen */ 6492bad8471SEric Van Hensbergen 6502bad8471SEric Van Hensbergen static struct dentry *v9fs_vfs_lookup(struct inode *dir, struct dentry *dentry, 6512bad8471SEric Van Hensbergen struct nameidata *nameidata) 6522bad8471SEric Van Hensbergen { 6532bad8471SEric Van Hensbergen struct super_block *sb; 6542bad8471SEric Van Hensbergen struct v9fs_session_info *v9ses; 655bd238fb4SLatchesar Ionkov struct p9_fid *dfid, *fid; 6562bad8471SEric Van Hensbergen struct inode *inode; 657bd238fb4SLatchesar Ionkov char *name; 6582bad8471SEric Van Hensbergen int result = 0; 6592bad8471SEric Van Hensbergen 660bd238fb4SLatchesar Ionkov P9_DPRINTK(P9_DEBUG_VFS, "dir: %p dentry: (%s) %p nameidata: %p\n", 661731805b4SLatchesar Ionkov dir, dentry->d_name.name, dentry, nameidata); 6622bad8471SEric Van Hensbergen 66311e9b49bSSripathi Kodi if (dentry->d_name.len > NAME_MAX) 66411e9b49bSSripathi Kodi return ERR_PTR(-ENAMETOOLONG); 66511e9b49bSSripathi Kodi 6662bad8471SEric Van Hensbergen sb = dir->i_sb; 6672bad8471SEric Van Hensbergen v9ses = v9fs_inode2v9ses(dir); 668bd238fb4SLatchesar Ionkov dfid = v9fs_fid_lookup(dentry->d_parent); 669bd238fb4SLatchesar Ionkov if (IS_ERR(dfid)) 670e231c2eeSDavid Howells return ERR_CAST(dfid); 6712bad8471SEric Van Hensbergen 672bd238fb4SLatchesar Ionkov name = (char *) dentry->d_name.name; 673bd238fb4SLatchesar Ionkov fid = p9_client_walk(dfid, 1, &name, 1); 674bd238fb4SLatchesar Ionkov if (IS_ERR(fid)) { 675bd238fb4SLatchesar Ionkov result = PTR_ERR(fid); 6762bad8471SEric Van Hensbergen if (result == -ENOENT) { 6772bad8471SEric Van Hensbergen d_add(dentry, NULL); 6782bad8471SEric Van Hensbergen return NULL; 6792bad8471SEric Van Hensbergen } 6802bad8471SEric Van Hensbergen 681bd238fb4SLatchesar Ionkov return ERR_PTR(result); 6822bad8471SEric Van Hensbergen } 6832bad8471SEric Van Hensbergen 684bd238fb4SLatchesar Ionkov inode = v9fs_inode_from_fid(v9ses, fid, dir->i_sb); 685bd238fb4SLatchesar Ionkov if (IS_ERR(inode)) { 686bd238fb4SLatchesar Ionkov result = PTR_ERR(inode); 687bd238fb4SLatchesar Ionkov inode = NULL; 688bd238fb4SLatchesar Ionkov goto error; 6892bad8471SEric Van Hensbergen } 6902bad8471SEric Van Hensbergen 691bd238fb4SLatchesar Ionkov result = v9fs_fid_add(dentry, fid); 6926a3124a3SLatchesar Ionkov if (result < 0) 693bd238fb4SLatchesar Ionkov goto error; 6946a3124a3SLatchesar Ionkov 695e03abc0cSEric Van Hensbergen if ((fid->qid.version) && (v9ses->cache)) 696e03abc0cSEric Van Hensbergen dentry->d_op = &v9fs_cached_dentry_operations; 697e03abc0cSEric Van Hensbergen else 698e03abc0cSEric Van Hensbergen dentry->d_op = &v9fs_dentry_operations; 6992bad8471SEric Van Hensbergen 7002bad8471SEric Van Hensbergen d_add(dentry, inode); 7012bad8471SEric Van Hensbergen return NULL; 7022bad8471SEric Van Hensbergen 703bd238fb4SLatchesar Ionkov error: 704bd238fb4SLatchesar Ionkov p9_client_clunk(fid); 705da977b2cSEric Van Hensbergen 7062bad8471SEric Van Hensbergen return ERR_PTR(result); 7072bad8471SEric Van Hensbergen } 7082bad8471SEric Van Hensbergen 7092bad8471SEric Van Hensbergen /** 7102bad8471SEric Van Hensbergen * v9fs_vfs_unlink - VFS unlink hook to delete an inode 7112bad8471SEric Van Hensbergen * @i: inode that is being unlinked 71273c592b9SEric Van Hensbergen * @d: dentry that is being unlinked 7132bad8471SEric Van Hensbergen * 7142bad8471SEric Van Hensbergen */ 7152bad8471SEric Van Hensbergen 7162bad8471SEric Van Hensbergen static int v9fs_vfs_unlink(struct inode *i, struct dentry *d) 7172bad8471SEric Van Hensbergen { 7182bad8471SEric Van Hensbergen return v9fs_remove(i, d, 0); 7192bad8471SEric Van Hensbergen } 7202bad8471SEric Van Hensbergen 7212bad8471SEric Van Hensbergen /** 7222bad8471SEric Van Hensbergen * v9fs_vfs_rmdir - VFS unlink hook to delete a directory 7232bad8471SEric Van Hensbergen * @i: inode that is being unlinked 72473c592b9SEric Van Hensbergen * @d: dentry that is being unlinked 7252bad8471SEric Van Hensbergen * 7262bad8471SEric Van Hensbergen */ 7272bad8471SEric Van Hensbergen 7282bad8471SEric Van Hensbergen static int v9fs_vfs_rmdir(struct inode *i, struct dentry *d) 7292bad8471SEric Van Hensbergen { 7302bad8471SEric Van Hensbergen return v9fs_remove(i, d, 1); 7312bad8471SEric Van Hensbergen } 7322bad8471SEric Van Hensbergen 7332bad8471SEric Van Hensbergen /** 7342bad8471SEric Van Hensbergen * v9fs_vfs_rename - VFS hook to rename an inode 7352bad8471SEric Van Hensbergen * @old_dir: old dir inode 7362bad8471SEric Van Hensbergen * @old_dentry: old dentry 7372bad8471SEric Van Hensbergen * @new_dir: new dir inode 7382bad8471SEric Van Hensbergen * @new_dentry: new dentry 7392bad8471SEric Van Hensbergen * 7402bad8471SEric Van Hensbergen */ 7412bad8471SEric Van Hensbergen 7422bad8471SEric Van Hensbergen static int 7432bad8471SEric Van Hensbergen v9fs_vfs_rename(struct inode *old_dir, struct dentry *old_dentry, 7442bad8471SEric Van Hensbergen struct inode *new_dir, struct dentry *new_dentry) 7452bad8471SEric Van Hensbergen { 746bd238fb4SLatchesar Ionkov struct inode *old_inode; 747bd238fb4SLatchesar Ionkov struct v9fs_session_info *v9ses; 748bd238fb4SLatchesar Ionkov struct p9_fid *oldfid; 749bd238fb4SLatchesar Ionkov struct p9_fid *olddirfid; 750bd238fb4SLatchesar Ionkov struct p9_fid *newdirfid; 751bd238fb4SLatchesar Ionkov struct p9_wstat wstat; 752bd238fb4SLatchesar Ionkov int retval; 7532bad8471SEric Van Hensbergen 754bd238fb4SLatchesar Ionkov P9_DPRINTK(P9_DEBUG_VFS, "\n"); 755bd238fb4SLatchesar Ionkov retval = 0; 756bd238fb4SLatchesar Ionkov old_inode = old_dentry->d_inode; 757bd238fb4SLatchesar Ionkov v9ses = v9fs_inode2v9ses(old_inode); 758bd238fb4SLatchesar Ionkov oldfid = v9fs_fid_lookup(old_dentry); 759da977b2cSEric Van Hensbergen if (IS_ERR(oldfid)) 760da977b2cSEric Van Hensbergen return PTR_ERR(oldfid); 761da977b2cSEric Van Hensbergen 762da977b2cSEric Van Hensbergen olddirfid = v9fs_fid_clone(old_dentry->d_parent); 763da977b2cSEric Van Hensbergen if (IS_ERR(olddirfid)) { 764da977b2cSEric Van Hensbergen retval = PTR_ERR(olddirfid); 765bd238fb4SLatchesar Ionkov goto done; 766da977b2cSEric Van Hensbergen } 767da977b2cSEric Van Hensbergen 768da977b2cSEric Van Hensbergen newdirfid = v9fs_fid_clone(new_dentry->d_parent); 769da977b2cSEric Van Hensbergen if (IS_ERR(newdirfid)) { 770da977b2cSEric Van Hensbergen retval = PTR_ERR(newdirfid); 771bd238fb4SLatchesar Ionkov goto clunk_olddir; 7722bad8471SEric Van Hensbergen } 7732bad8471SEric Van Hensbergen 7742bad8471SEric Van Hensbergen /* 9P can only handle file rename in the same directory */ 7752bad8471SEric Van Hensbergen if (memcmp(&olddirfid->qid, &newdirfid->qid, sizeof(newdirfid->qid))) { 776bd238fb4SLatchesar Ionkov P9_DPRINTK(P9_DEBUG_ERROR, 777bd238fb4SLatchesar Ionkov "old dir and new dir are different\n"); 778621997cdSEric Van Hensbergen retval = -EXDEV; 779bd238fb4SLatchesar Ionkov goto clunk_newdir; 7802bad8471SEric Van Hensbergen } 7812bad8471SEric Van Hensbergen 782531b1094SLatchesar Ionkov v9fs_blank_wstat(&wstat); 783ba17674fSLatchesar Ionkov wstat.muid = v9ses->uname; 784531b1094SLatchesar Ionkov wstat.name = (char *) new_dentry->d_name.name; 785bd238fb4SLatchesar Ionkov retval = p9_client_wstat(oldfid, &wstat); 7862bad8471SEric Van Hensbergen 787bd238fb4SLatchesar Ionkov clunk_newdir: 78822150c4fSLatchesar Ionkov p9_client_clunk(newdirfid); 7892bad8471SEric Van Hensbergen 790bd238fb4SLatchesar Ionkov clunk_olddir: 79122150c4fSLatchesar Ionkov p9_client_clunk(olddirfid); 7922bad8471SEric Van Hensbergen 793bd238fb4SLatchesar Ionkov done: 7942bad8471SEric Van Hensbergen return retval; 7952bad8471SEric Van Hensbergen } 7962bad8471SEric Van Hensbergen 7972bad8471SEric Van Hensbergen /** 798943ffb58SAdrian Bunk * v9fs_vfs_getattr - retrieve file metadata 799ee443996SEric Van Hensbergen * @mnt: mount information 800ee443996SEric Van Hensbergen * @dentry: file to get attributes on 801ee443996SEric Van Hensbergen * @stat: metadata structure to populate 8022bad8471SEric Van Hensbergen * 8032bad8471SEric Van Hensbergen */ 8042bad8471SEric Van Hensbergen 8052bad8471SEric Van Hensbergen static int 8062bad8471SEric Van Hensbergen v9fs_vfs_getattr(struct vfsmount *mnt, struct dentry *dentry, 8072bad8471SEric Van Hensbergen struct kstat *stat) 8082bad8471SEric Van Hensbergen { 809bd238fb4SLatchesar Ionkov int err; 810bd238fb4SLatchesar Ionkov struct v9fs_session_info *v9ses; 811bd238fb4SLatchesar Ionkov struct p9_fid *fid; 81251a87c55SEric Van Hensbergen struct p9_wstat *st; 8132bad8471SEric Van Hensbergen 814bd238fb4SLatchesar Ionkov P9_DPRINTK(P9_DEBUG_VFS, "dentry: %p\n", dentry); 815bd238fb4SLatchesar Ionkov err = -EPERM; 816bd238fb4SLatchesar Ionkov v9ses = v9fs_inode2v9ses(dentry->d_inode); 81760e78d2cSAbhishek Kulkarni if (v9ses->cache == CACHE_LOOSE || v9ses->cache == CACHE_FSCACHE) 8189523a841SEric Van Hensbergen return simple_getattr(mnt, dentry, stat); 8199523a841SEric Van Hensbergen 820bd238fb4SLatchesar Ionkov fid = v9fs_fid_lookup(dentry); 821da977b2cSEric Van Hensbergen if (IS_ERR(fid)) 822da977b2cSEric Van Hensbergen return PTR_ERR(fid); 8232bad8471SEric Van Hensbergen 824bd238fb4SLatchesar Ionkov st = p9_client_stat(fid); 825bd238fb4SLatchesar Ionkov if (IS_ERR(st)) 826bd238fb4SLatchesar Ionkov return PTR_ERR(st); 8272bad8471SEric Van Hensbergen 828bd238fb4SLatchesar Ionkov v9fs_stat2inode(st, dentry->d_inode, dentry->d_inode->i_sb); 8292bad8471SEric Van Hensbergen generic_fillattr(dentry->d_inode, stat); 8302bad8471SEric Van Hensbergen 831bd238fb4SLatchesar Ionkov kfree(st); 832bd238fb4SLatchesar Ionkov return 0; 8332bad8471SEric Van Hensbergen } 8342bad8471SEric Van Hensbergen 8352bad8471SEric Van Hensbergen /** 8362bad8471SEric Van Hensbergen * v9fs_vfs_setattr - set file metadata 8372bad8471SEric Van Hensbergen * @dentry: file whose metadata to set 8382bad8471SEric Van Hensbergen * @iattr: metadata assignment structure 8392bad8471SEric Van Hensbergen * 8402bad8471SEric Van Hensbergen */ 8412bad8471SEric Van Hensbergen 8422bad8471SEric Van Hensbergen static int v9fs_vfs_setattr(struct dentry *dentry, struct iattr *iattr) 8432bad8471SEric Van Hensbergen { 844bd238fb4SLatchesar Ionkov int retval; 845bd238fb4SLatchesar Ionkov struct v9fs_session_info *v9ses; 846bd238fb4SLatchesar Ionkov struct p9_fid *fid; 847bd238fb4SLatchesar Ionkov struct p9_wstat wstat; 8482bad8471SEric Van Hensbergen 849bd238fb4SLatchesar Ionkov P9_DPRINTK(P9_DEBUG_VFS, "\n"); 850bd238fb4SLatchesar Ionkov retval = -EPERM; 851bd238fb4SLatchesar Ionkov v9ses = v9fs_inode2v9ses(dentry->d_inode); 852bd238fb4SLatchesar Ionkov fid = v9fs_fid_lookup(dentry); 853da977b2cSEric Van Hensbergen if(IS_ERR(fid)) 854da977b2cSEric Van Hensbergen return PTR_ERR(fid); 8552bad8471SEric Van Hensbergen 856531b1094SLatchesar Ionkov v9fs_blank_wstat(&wstat); 8572bad8471SEric Van Hensbergen if (iattr->ia_valid & ATTR_MODE) 858531b1094SLatchesar Ionkov wstat.mode = unixmode2p9mode(v9ses, iattr->ia_mode); 8592bad8471SEric Van Hensbergen 8602bad8471SEric Van Hensbergen if (iattr->ia_valid & ATTR_MTIME) 861531b1094SLatchesar Ionkov wstat.mtime = iattr->ia_mtime.tv_sec; 8622bad8471SEric Van Hensbergen 8632bad8471SEric Van Hensbergen if (iattr->ia_valid & ATTR_ATIME) 864531b1094SLatchesar Ionkov wstat.atime = iattr->ia_atime.tv_sec; 8652bad8471SEric Van Hensbergen 8662bad8471SEric Van Hensbergen if (iattr->ia_valid & ATTR_SIZE) 867531b1094SLatchesar Ionkov wstat.length = iattr->ia_size; 8682bad8471SEric Van Hensbergen 869dd6102fbSSripathi Kodi if (v9fs_proto_dotu(v9ses)) { 870531b1094SLatchesar Ionkov if (iattr->ia_valid & ATTR_UID) 871531b1094SLatchesar Ionkov wstat.n_uid = iattr->ia_uid; 8722bad8471SEric Van Hensbergen 873531b1094SLatchesar Ionkov if (iattr->ia_valid & ATTR_GID) 874531b1094SLatchesar Ionkov wstat.n_gid = iattr->ia_gid; 8752bad8471SEric Van Hensbergen } 8762bad8471SEric Van Hensbergen 877bd238fb4SLatchesar Ionkov retval = p9_client_wstat(fid, &wstat); 878bd238fb4SLatchesar Ionkov if (retval >= 0) 879bd238fb4SLatchesar Ionkov retval = inode_setattr(dentry->d_inode, iattr); 8802bad8471SEric Van Hensbergen 881bd238fb4SLatchesar Ionkov return retval; 8822bad8471SEric Van Hensbergen } 8832bad8471SEric Van Hensbergen 8842bad8471SEric Van Hensbergen /** 885531b1094SLatchesar Ionkov * v9fs_stat2inode - populate an inode structure with mistat info 886531b1094SLatchesar Ionkov * @stat: Plan 9 metadata (mistat) structure 8872bad8471SEric Van Hensbergen * @inode: inode to populate 8882bad8471SEric Van Hensbergen * @sb: superblock of filesystem 8892bad8471SEric Van Hensbergen * 8902bad8471SEric Van Hensbergen */ 8912bad8471SEric Van Hensbergen 8922bad8471SEric Van Hensbergen void 89351a87c55SEric Van Hensbergen v9fs_stat2inode(struct p9_wstat *stat, struct inode *inode, 8942bad8471SEric Van Hensbergen struct super_block *sb) 8952bad8471SEric Van Hensbergen { 896531b1094SLatchesar Ionkov char ext[32]; 8975717144aSAneesh Kumar K.V char tag_name[14]; 8985717144aSAneesh Kumar K.V unsigned int i_nlink; 8992bad8471SEric Van Hensbergen struct v9fs_session_info *v9ses = sb->s_fs_info; 9002bad8471SEric Van Hensbergen 9012bad8471SEric Van Hensbergen inode->i_nlink = 1; 9022bad8471SEric Van Hensbergen 903531b1094SLatchesar Ionkov inode->i_atime.tv_sec = stat->atime; 904531b1094SLatchesar Ionkov inode->i_mtime.tv_sec = stat->mtime; 905531b1094SLatchesar Ionkov inode->i_ctime.tv_sec = stat->mtime; 9062bad8471SEric Van Hensbergen 907bd32b82dSLatchesar Ionkov inode->i_uid = v9ses->dfltuid; 908bd32b82dSLatchesar Ionkov inode->i_gid = v9ses->dfltgid; 9092bad8471SEric Van Hensbergen 910dd6102fbSSripathi Kodi if (v9fs_proto_dotu(v9ses)) { 911531b1094SLatchesar Ionkov inode->i_uid = stat->n_uid; 912531b1094SLatchesar Ionkov inode->i_gid = stat->n_gid; 913531b1094SLatchesar Ionkov } 9145717144aSAneesh Kumar K.V if ((S_ISREG(inode->i_mode)) || (S_ISDIR(inode->i_mode))) { 9155717144aSAneesh Kumar K.V if (v9fs_proto_dotu(v9ses) && (stat->extension[0] != '\0')) { 9165717144aSAneesh Kumar K.V /* 9175717144aSAneesh Kumar K.V * Hadlink support got added later to 9185717144aSAneesh Kumar K.V * to the .u extension. So there can be 9195717144aSAneesh Kumar K.V * server out there that doesn't support 9205717144aSAneesh Kumar K.V * this even with .u extension. So check 9215717144aSAneesh Kumar K.V * for non NULL stat->extension 9225717144aSAneesh Kumar K.V */ 9235717144aSAneesh Kumar K.V strncpy(ext, stat->extension, sizeof(ext)); 9245717144aSAneesh Kumar K.V /* HARDLINKCOUNT %u */ 9255717144aSAneesh Kumar K.V sscanf(ext, "%13s %u", tag_name, &i_nlink); 9265717144aSAneesh Kumar K.V if (!strncmp(tag_name, "HARDLINKCOUNT", 13)) 9275717144aSAneesh Kumar K.V inode->i_nlink = i_nlink; 9285717144aSAneesh Kumar K.V } 9295717144aSAneesh Kumar K.V } 930531b1094SLatchesar Ionkov inode->i_mode = p9mode2unixmode(v9ses, stat->mode); 9312bad8471SEric Van Hensbergen if ((S_ISBLK(inode->i_mode)) || (S_ISCHR(inode->i_mode))) { 9322bad8471SEric Van Hensbergen char type = 0; 9332bad8471SEric Van Hensbergen int major = -1; 9342bad8471SEric Van Hensbergen int minor = -1; 935531b1094SLatchesar Ionkov 93651a87c55SEric Van Hensbergen strncpy(ext, stat->extension, sizeof(ext)); 937531b1094SLatchesar Ionkov sscanf(ext, "%c %u %u", &type, &major, &minor); 9382bad8471SEric Van Hensbergen switch (type) { 9392bad8471SEric Van Hensbergen case 'c': 9402bad8471SEric Van Hensbergen inode->i_mode &= ~S_IFBLK; 9412bad8471SEric Van Hensbergen inode->i_mode |= S_IFCHR; 9422bad8471SEric Van Hensbergen break; 9432bad8471SEric Van Hensbergen case 'b': 9442bad8471SEric Van Hensbergen break; 9452bad8471SEric Van Hensbergen default: 946bd238fb4SLatchesar Ionkov P9_DPRINTK(P9_DEBUG_ERROR, 94751a87c55SEric Van Hensbergen "Unknown special type %c %s\n", type, 94851a87c55SEric Van Hensbergen stat->extension); 9492bad8471SEric Van Hensbergen }; 9502bad8471SEric Van Hensbergen inode->i_rdev = MKDEV(major, minor); 95157c7b4e6SMagnus Deininger init_special_inode(inode, inode->i_mode, inode->i_rdev); 9522bad8471SEric Van Hensbergen } else 9532bad8471SEric Van Hensbergen inode->i_rdev = 0; 9542bad8471SEric Van Hensbergen 9557549ae3eSAbhishek Kulkarni i_size_write(inode, stat->length); 9562bad8471SEric Van Hensbergen 957bd238fb4SLatchesar Ionkov /* not real number of blocks, but 512 byte ones ... */ 9587549ae3eSAbhishek Kulkarni inode->i_blocks = (i_size_read(inode) + 512 - 1) >> 9; 9592bad8471SEric Van Hensbergen } 9602bad8471SEric Van Hensbergen 9612bad8471SEric Van Hensbergen /** 9622bad8471SEric Van Hensbergen * v9fs_qid2ino - convert qid into inode number 9632bad8471SEric Van Hensbergen * @qid: qid to hash 9642bad8471SEric Van Hensbergen * 9652bad8471SEric Van Hensbergen * BUG: potential for inode number collisions? 9662bad8471SEric Van Hensbergen */ 9672bad8471SEric Van Hensbergen 968bd238fb4SLatchesar Ionkov ino_t v9fs_qid2ino(struct p9_qid *qid) 9692bad8471SEric Van Hensbergen { 9702bad8471SEric Van Hensbergen u64 path = qid->path + 2; 9712bad8471SEric Van Hensbergen ino_t i = 0; 9722bad8471SEric Van Hensbergen 9732bad8471SEric Van Hensbergen if (sizeof(ino_t) == sizeof(path)) 9742bad8471SEric Van Hensbergen memcpy(&i, &path, sizeof(ino_t)); 9752bad8471SEric Van Hensbergen else 9762bad8471SEric Van Hensbergen i = (ino_t) (path ^ (path >> 32)); 9772bad8471SEric Van Hensbergen 9782bad8471SEric Van Hensbergen return i; 9792bad8471SEric Van Hensbergen } 9802bad8471SEric Van Hensbergen 9812bad8471SEric Van Hensbergen /** 9822bad8471SEric Van Hensbergen * v9fs_readlink - read a symlink's location (internal version) 9832bad8471SEric Van Hensbergen * @dentry: dentry for symlink 98473c592b9SEric Van Hensbergen * @buffer: buffer to load symlink location into 9852bad8471SEric Van Hensbergen * @buflen: length of buffer 9862bad8471SEric Van Hensbergen * 9872bad8471SEric Van Hensbergen */ 9882bad8471SEric Van Hensbergen 9892bad8471SEric Van Hensbergen static int v9fs_readlink(struct dentry *dentry, char *buffer, int buflen) 9902bad8471SEric Van Hensbergen { 991bd238fb4SLatchesar Ionkov int retval; 9922bad8471SEric Van Hensbergen 993bd238fb4SLatchesar Ionkov struct v9fs_session_info *v9ses; 994bd238fb4SLatchesar Ionkov struct p9_fid *fid; 99551a87c55SEric Van Hensbergen struct p9_wstat *st; 9962bad8471SEric Van Hensbergen 997bd238fb4SLatchesar Ionkov P9_DPRINTK(P9_DEBUG_VFS, " %s\n", dentry->d_name.name); 998bd238fb4SLatchesar Ionkov retval = -EPERM; 999bd238fb4SLatchesar Ionkov v9ses = v9fs_inode2v9ses(dentry->d_inode); 1000bd238fb4SLatchesar Ionkov fid = v9fs_fid_lookup(dentry); 1001da977b2cSEric Van Hensbergen if (IS_ERR(fid)) 1002da977b2cSEric Van Hensbergen return PTR_ERR(fid); 10032bad8471SEric Van Hensbergen 1004dd6102fbSSripathi Kodi if (!v9fs_proto_dotu(v9ses)) 1005bd238fb4SLatchesar Ionkov return -EBADF; 10062bad8471SEric Van Hensbergen 1007bd238fb4SLatchesar Ionkov st = p9_client_stat(fid); 1008bd238fb4SLatchesar Ionkov if (IS_ERR(st)) 1009bd238fb4SLatchesar Ionkov return PTR_ERR(st); 10102bad8471SEric Van Hensbergen 1011bd238fb4SLatchesar Ionkov if (!(st->mode & P9_DMSYMLINK)) { 10122bad8471SEric Van Hensbergen retval = -EINVAL; 1013bd238fb4SLatchesar Ionkov goto done; 10142bad8471SEric Van Hensbergen } 10152bad8471SEric Van Hensbergen 10162bad8471SEric Van Hensbergen /* copy extension buffer into buffer */ 101751a87c55SEric Van Hensbergen strncpy(buffer, st->extension, buflen); 10182bad8471SEric Van Hensbergen 1019bd238fb4SLatchesar Ionkov P9_DPRINTK(P9_DEBUG_VFS, 102051a87c55SEric Van Hensbergen "%s -> %s (%s)\n", dentry->d_name.name, st->extension, buffer); 1021bd238fb4SLatchesar Ionkov 10222511cd0bSMartin Stava retval = strnlen(buffer, buflen); 1023bd238fb4SLatchesar Ionkov done: 1024bd238fb4SLatchesar Ionkov kfree(st); 10252bad8471SEric Van Hensbergen return retval; 10262bad8471SEric Van Hensbergen } 10272bad8471SEric Van Hensbergen 10282bad8471SEric Van Hensbergen /** 10292bad8471SEric Van Hensbergen * v9fs_vfs_follow_link - follow a symlink path 10302bad8471SEric Van Hensbergen * @dentry: dentry for symlink 10312bad8471SEric Van Hensbergen * @nd: nameidata 10322bad8471SEric Van Hensbergen * 10332bad8471SEric Van Hensbergen */ 10342bad8471SEric Van Hensbergen 10352bad8471SEric Van Hensbergen static void *v9fs_vfs_follow_link(struct dentry *dentry, struct nameidata *nd) 10362bad8471SEric Van Hensbergen { 10372bad8471SEric Van Hensbergen int len = 0; 10382bad8471SEric Van Hensbergen char *link = __getname(); 10392bad8471SEric Van Hensbergen 1040bd238fb4SLatchesar Ionkov P9_DPRINTK(P9_DEBUG_VFS, "%s n", dentry->d_name.name); 10412bad8471SEric Van Hensbergen 10422bad8471SEric Van Hensbergen if (!link) 10432bad8471SEric Van Hensbergen link = ERR_PTR(-ENOMEM); 10442bad8471SEric Van Hensbergen else { 104516cce6d2SLatchesar Ionkov len = v9fs_readlink(dentry, link, PATH_MAX); 10462bad8471SEric Van Hensbergen 10472bad8471SEric Van Hensbergen if (len < 0) { 1048ce44eeb6SDavi Arnaut __putname(link); 10492bad8471SEric Van Hensbergen link = ERR_PTR(len); 10502bad8471SEric Van Hensbergen } else 10512511cd0bSMartin Stava link[min(len, PATH_MAX-1)] = 0; 10522bad8471SEric Van Hensbergen } 10532bad8471SEric Van Hensbergen nd_set_link(nd, link); 10542bad8471SEric Van Hensbergen 10552bad8471SEric Van Hensbergen return NULL; 10562bad8471SEric Van Hensbergen } 10572bad8471SEric Van Hensbergen 10582bad8471SEric Van Hensbergen /** 10592bad8471SEric Van Hensbergen * v9fs_vfs_put_link - release a symlink path 10602bad8471SEric Van Hensbergen * @dentry: dentry for symlink 10612bad8471SEric Van Hensbergen * @nd: nameidata 1062ee443996SEric Van Hensbergen * @p: unused 10632bad8471SEric Van Hensbergen * 10642bad8471SEric Van Hensbergen */ 10652bad8471SEric Van Hensbergen 1066ee443996SEric Van Hensbergen static void 1067ee443996SEric Van Hensbergen v9fs_vfs_put_link(struct dentry *dentry, struct nameidata *nd, void *p) 10682bad8471SEric Van Hensbergen { 10692bad8471SEric Van Hensbergen char *s = nd_get_link(nd); 10702bad8471SEric Van Hensbergen 10716ff23207SDuane Griffin P9_DPRINTK(P9_DEBUG_VFS, " %s %s\n", dentry->d_name.name, 10726ff23207SDuane Griffin IS_ERR(s) ? "<error>" : s); 10732bad8471SEric Van Hensbergen if (!IS_ERR(s)) 1074ce44eeb6SDavi Arnaut __putname(s); 10752bad8471SEric Van Hensbergen } 10762bad8471SEric Van Hensbergen 1077ee443996SEric Van Hensbergen /** 1078ee443996SEric Van Hensbergen * v9fs_vfs_mkspecial - create a special file 1079ee443996SEric Van Hensbergen * @dir: inode to create special file in 1080ee443996SEric Van Hensbergen * @dentry: dentry to create 1081ee443996SEric Van Hensbergen * @mode: mode to create special file 1082ee443996SEric Van Hensbergen * @extension: 9p2000.u format extension string representing special file 1083ee443996SEric Van Hensbergen * 1084ee443996SEric Van Hensbergen */ 1085ee443996SEric Van Hensbergen 1086531b1094SLatchesar Ionkov static int v9fs_vfs_mkspecial(struct inode *dir, struct dentry *dentry, 1087531b1094SLatchesar Ionkov int mode, const char *extension) 1088531b1094SLatchesar Ionkov { 1089bd238fb4SLatchesar Ionkov u32 perm; 1090531b1094SLatchesar Ionkov struct v9fs_session_info *v9ses; 1091bd238fb4SLatchesar Ionkov struct p9_fid *fid; 1092531b1094SLatchesar Ionkov 10936a3124a3SLatchesar Ionkov v9ses = v9fs_inode2v9ses(dir); 1094dd6102fbSSripathi Kodi if (!v9fs_proto_dotu(v9ses)) { 1095bd238fb4SLatchesar Ionkov P9_DPRINTK(P9_DEBUG_ERROR, "not extended\n"); 10966a3124a3SLatchesar Ionkov return -EPERM; 1097531b1094SLatchesar Ionkov } 1098531b1094SLatchesar Ionkov 1099da977b2cSEric Van Hensbergen perm = unixmode2p9mode(v9ses, mode); 1100bd238fb4SLatchesar Ionkov fid = v9fs_create(v9ses, dir, dentry, (char *) extension, perm, 1101bd238fb4SLatchesar Ionkov P9_OREAD); 1102bd238fb4SLatchesar Ionkov if (IS_ERR(fid)) 1103bd238fb4SLatchesar Ionkov return PTR_ERR(fid); 1104da977b2cSEric Van Hensbergen 1105bd238fb4SLatchesar Ionkov p9_client_clunk(fid); 11066a3124a3SLatchesar Ionkov return 0; 1107531b1094SLatchesar Ionkov } 1108531b1094SLatchesar Ionkov 1109531b1094SLatchesar Ionkov /** 1110531b1094SLatchesar Ionkov * v9fs_vfs_symlink - helper function to create symlinks 1111531b1094SLatchesar Ionkov * @dir: directory inode containing symlink 1112531b1094SLatchesar Ionkov * @dentry: dentry for symlink 1113531b1094SLatchesar Ionkov * @symname: symlink data 1114531b1094SLatchesar Ionkov * 1115ee443996SEric Van Hensbergen * See Also: 9P2000.u RFC for more information 1116531b1094SLatchesar Ionkov * 1117531b1094SLatchesar Ionkov */ 1118531b1094SLatchesar Ionkov 1119531b1094SLatchesar Ionkov static int 1120531b1094SLatchesar Ionkov v9fs_vfs_symlink(struct inode *dir, struct dentry *dentry, const char *symname) 1121531b1094SLatchesar Ionkov { 1122bd238fb4SLatchesar Ionkov P9_DPRINTK(P9_DEBUG_VFS, " %lu,%s,%s\n", dir->i_ino, 1123bd238fb4SLatchesar Ionkov dentry->d_name.name, symname); 1124531b1094SLatchesar Ionkov 1125531b1094SLatchesar Ionkov return v9fs_vfs_mkspecial(dir, dentry, S_IFLNK, symname); 1126531b1094SLatchesar Ionkov } 1127531b1094SLatchesar Ionkov 11282bad8471SEric Van Hensbergen /** 11292bad8471SEric Van Hensbergen * v9fs_vfs_link - create a hardlink 11302bad8471SEric Van Hensbergen * @old_dentry: dentry for file to link to 11312bad8471SEric Van Hensbergen * @dir: inode destination for new link 113273c592b9SEric Van Hensbergen * @dentry: dentry for link 11332bad8471SEric Van Hensbergen * 11342bad8471SEric Van Hensbergen */ 11352bad8471SEric Van Hensbergen 11362bad8471SEric Van Hensbergen static int 11372bad8471SEric Van Hensbergen v9fs_vfs_link(struct dentry *old_dentry, struct inode *dir, 11382bad8471SEric Van Hensbergen struct dentry *dentry) 11392bad8471SEric Van Hensbergen { 1140531b1094SLatchesar Ionkov int retval; 1141bd238fb4SLatchesar Ionkov struct p9_fid *oldfid; 1142531b1094SLatchesar Ionkov char *name; 11432bad8471SEric Van Hensbergen 1144bd238fb4SLatchesar Ionkov P9_DPRINTK(P9_DEBUG_VFS, 1145bd238fb4SLatchesar Ionkov " %lu,%s,%s\n", dir->i_ino, dentry->d_name.name, 11462bad8471SEric Van Hensbergen old_dentry->d_name.name); 11472bad8471SEric Van Hensbergen 1148da977b2cSEric Van Hensbergen oldfid = v9fs_fid_clone(old_dentry); 1149da977b2cSEric Van Hensbergen if (IS_ERR(oldfid)) 1150da977b2cSEric Van Hensbergen return PTR_ERR(oldfid); 11512bad8471SEric Van Hensbergen 1152531b1094SLatchesar Ionkov name = __getname(); 1153da977b2cSEric Van Hensbergen if (unlikely(!name)) { 1154da977b2cSEric Van Hensbergen retval = -ENOMEM; 1155da977b2cSEric Van Hensbergen goto clunk_fid; 1156da977b2cSEric Van Hensbergen } 11570710d36aSFlorin Malita 115816cce6d2SLatchesar Ionkov sprintf(name, "%d\n", oldfid->fid); 1159bd238fb4SLatchesar Ionkov retval = v9fs_vfs_mkspecial(dir, dentry, P9_DMLINK, name); 1160531b1094SLatchesar Ionkov __putname(name); 11612bad8471SEric Van Hensbergen 1162da977b2cSEric Van Hensbergen clunk_fid: 1163bd238fb4SLatchesar Ionkov p9_client_clunk(oldfid); 11642bad8471SEric Van Hensbergen return retval; 11652bad8471SEric Van Hensbergen } 11662bad8471SEric Van Hensbergen 11672bad8471SEric Van Hensbergen /** 11682bad8471SEric Van Hensbergen * v9fs_vfs_mknod - create a special file 11692bad8471SEric Van Hensbergen * @dir: inode destination for new link 11702bad8471SEric Van Hensbergen * @dentry: dentry for file 11712bad8471SEric Van Hensbergen * @mode: mode for creation 1172ee443996SEric Van Hensbergen * @rdev: device associated with special file 11732bad8471SEric Van Hensbergen * 11742bad8471SEric Van Hensbergen */ 11752bad8471SEric Van Hensbergen 11762bad8471SEric Van Hensbergen static int 11772bad8471SEric Van Hensbergen v9fs_vfs_mknod(struct inode *dir, struct dentry *dentry, int mode, dev_t rdev) 11782bad8471SEric Van Hensbergen { 1179531b1094SLatchesar Ionkov int retval; 1180531b1094SLatchesar Ionkov char *name; 11812bad8471SEric Van Hensbergen 1182bd238fb4SLatchesar Ionkov P9_DPRINTK(P9_DEBUG_VFS, 1183bd238fb4SLatchesar Ionkov " %lu,%s mode: %x MAJOR: %u MINOR: %u\n", dir->i_ino, 11842bad8471SEric Van Hensbergen dentry->d_name.name, mode, MAJOR(rdev), MINOR(rdev)); 11852bad8471SEric Van Hensbergen 1186531b1094SLatchesar Ionkov if (!new_valid_dev(rdev)) 1187531b1094SLatchesar Ionkov return -EINVAL; 118873c592b9SEric Van Hensbergen 1189531b1094SLatchesar Ionkov name = __getname(); 1190c0291a05SEugene Teo if (!name) 1191c0291a05SEugene Teo return -ENOMEM; 11922bad8471SEric Van Hensbergen /* build extension */ 11932bad8471SEric Van Hensbergen if (S_ISBLK(mode)) 1194531b1094SLatchesar Ionkov sprintf(name, "b %u %u", MAJOR(rdev), MINOR(rdev)); 11952bad8471SEric Van Hensbergen else if (S_ISCHR(mode)) 1196531b1094SLatchesar Ionkov sprintf(name, "c %u %u", MAJOR(rdev), MINOR(rdev)); 119773c592b9SEric Van Hensbergen else if (S_ISFIFO(mode)) 1198531b1094SLatchesar Ionkov *name = 0; 11992bad8471SEric Van Hensbergen else { 1200531b1094SLatchesar Ionkov __putname(name); 1201531b1094SLatchesar Ionkov return -EINVAL; 12022bad8471SEric Van Hensbergen } 12032bad8471SEric Van Hensbergen 1204531b1094SLatchesar Ionkov retval = v9fs_vfs_mkspecial(dir, dentry, mode, name); 1205531b1094SLatchesar Ionkov __putname(name); 12062bad8471SEric Van Hensbergen 12072bad8471SEric Van Hensbergen return retval; 12082bad8471SEric Van Hensbergen } 12092bad8471SEric Van Hensbergen 1210754661f1SArjan van de Ven static const struct inode_operations v9fs_dir_inode_operations_ext = { 12112bad8471SEric Van Hensbergen .create = v9fs_vfs_create, 12122bad8471SEric Van Hensbergen .lookup = v9fs_vfs_lookup, 12132bad8471SEric Van Hensbergen .symlink = v9fs_vfs_symlink, 12142bad8471SEric Van Hensbergen .link = v9fs_vfs_link, 12152bad8471SEric Van Hensbergen .unlink = v9fs_vfs_unlink, 12162bad8471SEric Van Hensbergen .mkdir = v9fs_vfs_mkdir, 12172bad8471SEric Van Hensbergen .rmdir = v9fs_vfs_rmdir, 12182bad8471SEric Van Hensbergen .mknod = v9fs_vfs_mknod, 12192bad8471SEric Van Hensbergen .rename = v9fs_vfs_rename, 12202bad8471SEric Van Hensbergen .getattr = v9fs_vfs_getattr, 12212bad8471SEric Van Hensbergen .setattr = v9fs_vfs_setattr, 12222bad8471SEric Van Hensbergen }; 12232bad8471SEric Van Hensbergen 1224754661f1SArjan van de Ven static const struct inode_operations v9fs_dir_inode_operations = { 1225b501611aSEric Van Hensbergen .create = v9fs_vfs_create, 1226b501611aSEric Van Hensbergen .lookup = v9fs_vfs_lookup, 1227b501611aSEric Van Hensbergen .unlink = v9fs_vfs_unlink, 1228b501611aSEric Van Hensbergen .mkdir = v9fs_vfs_mkdir, 1229b501611aSEric Van Hensbergen .rmdir = v9fs_vfs_rmdir, 1230b501611aSEric Van Hensbergen .mknod = v9fs_vfs_mknod, 1231b501611aSEric Van Hensbergen .rename = v9fs_vfs_rename, 1232b501611aSEric Van Hensbergen .getattr = v9fs_vfs_getattr, 1233b501611aSEric Van Hensbergen .setattr = v9fs_vfs_setattr, 1234b501611aSEric Van Hensbergen }; 1235b501611aSEric Van Hensbergen 1236754661f1SArjan van de Ven static const struct inode_operations v9fs_file_inode_operations = { 12372bad8471SEric Van Hensbergen .getattr = v9fs_vfs_getattr, 12382bad8471SEric Van Hensbergen .setattr = v9fs_vfs_setattr, 12392bad8471SEric Van Hensbergen }; 12402bad8471SEric Van Hensbergen 1241754661f1SArjan van de Ven static const struct inode_operations v9fs_symlink_inode_operations = { 1242204f2f0eSAl Viro .readlink = generic_readlink, 12432bad8471SEric Van Hensbergen .follow_link = v9fs_vfs_follow_link, 12442bad8471SEric Van Hensbergen .put_link = v9fs_vfs_put_link, 12452bad8471SEric Van Hensbergen .getattr = v9fs_vfs_getattr, 12462bad8471SEric Van Hensbergen .setattr = v9fs_vfs_setattr, 12472bad8471SEric Van Hensbergen }; 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