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" 432bad8471SEric Van Hensbergen 44754661f1SArjan van de Ven static const struct inode_operations v9fs_dir_inode_operations; 45754661f1SArjan van de Ven static const struct inode_operations v9fs_dir_inode_operations_ext; 46754661f1SArjan van de Ven static const struct inode_operations v9fs_file_inode_operations; 47754661f1SArjan van de Ven static const struct inode_operations v9fs_symlink_inode_operations; 482bad8471SEric Van Hensbergen 492bad8471SEric Van Hensbergen /** 502bad8471SEric Van Hensbergen * unixmode2p9mode - convert unix mode bits to plan 9 512bad8471SEric Van Hensbergen * @v9ses: v9fs session information 522bad8471SEric Van Hensbergen * @mode: mode to convert 532bad8471SEric Van Hensbergen * 542bad8471SEric Van Hensbergen */ 552bad8471SEric Van Hensbergen 5673c592b9SEric Van Hensbergen static int unixmode2p9mode(struct v9fs_session_info *v9ses, int mode) 572bad8471SEric Van Hensbergen { 582bad8471SEric Van Hensbergen int res; 592bad8471SEric Van Hensbergen res = mode & 0777; 602bad8471SEric Van Hensbergen if (S_ISDIR(mode)) 61bd238fb4SLatchesar Ionkov res |= P9_DMDIR; 622405669bSLatchesar Ionkov if (v9fs_extended(v9ses)) { 632bad8471SEric Van Hensbergen if (S_ISLNK(mode)) 64bd238fb4SLatchesar Ionkov res |= P9_DMSYMLINK; 652bad8471SEric Van Hensbergen if (v9ses->nodev == 0) { 662bad8471SEric Van Hensbergen if (S_ISSOCK(mode)) 67bd238fb4SLatchesar Ionkov res |= P9_DMSOCKET; 682bad8471SEric Van Hensbergen if (S_ISFIFO(mode)) 69bd238fb4SLatchesar Ionkov res |= P9_DMNAMEDPIPE; 702bad8471SEric Van Hensbergen if (S_ISBLK(mode)) 71bd238fb4SLatchesar Ionkov res |= P9_DMDEVICE; 722bad8471SEric Van Hensbergen if (S_ISCHR(mode)) 73bd238fb4SLatchesar Ionkov res |= P9_DMDEVICE; 742bad8471SEric Van Hensbergen } 752bad8471SEric Van Hensbergen 762bad8471SEric Van Hensbergen if ((mode & S_ISUID) == S_ISUID) 77bd238fb4SLatchesar Ionkov res |= P9_DMSETUID; 782bad8471SEric Van Hensbergen if ((mode & S_ISGID) == S_ISGID) 79bd238fb4SLatchesar Ionkov res |= P9_DMSETGID; 80bd238fb4SLatchesar Ionkov if ((mode & P9_DMLINK)) 81bd238fb4SLatchesar Ionkov res |= P9_DMLINK; 822bad8471SEric Van Hensbergen } 832bad8471SEric Van Hensbergen 842bad8471SEric Van Hensbergen return res; 852bad8471SEric Van Hensbergen } 862bad8471SEric Van Hensbergen 872bad8471SEric Van Hensbergen /** 882bad8471SEric Van Hensbergen * p9mode2unixmode- convert plan9 mode bits to unix mode bits 892bad8471SEric Van Hensbergen * @v9ses: v9fs session information 902bad8471SEric Van Hensbergen * @mode: mode to convert 912bad8471SEric Van Hensbergen * 922bad8471SEric Van Hensbergen */ 932bad8471SEric Van Hensbergen 9473c592b9SEric Van Hensbergen static int p9mode2unixmode(struct v9fs_session_info *v9ses, int mode) 952bad8471SEric Van Hensbergen { 962bad8471SEric Van Hensbergen int res; 972bad8471SEric Van Hensbergen 982bad8471SEric Van Hensbergen res = mode & 0777; 992bad8471SEric Van Hensbergen 100bd238fb4SLatchesar Ionkov if ((mode & P9_DMDIR) == P9_DMDIR) 1012bad8471SEric Van Hensbergen res |= S_IFDIR; 1022405669bSLatchesar Ionkov else if ((mode & P9_DMSYMLINK) && (v9fs_extended(v9ses))) 1032bad8471SEric Van Hensbergen res |= S_IFLNK; 1042405669bSLatchesar Ionkov else if ((mode & P9_DMSOCKET) && (v9fs_extended(v9ses)) 1052bad8471SEric Van Hensbergen && (v9ses->nodev == 0)) 1062bad8471SEric Van Hensbergen res |= S_IFSOCK; 1072405669bSLatchesar Ionkov else if ((mode & P9_DMNAMEDPIPE) && (v9fs_extended(v9ses)) 1082bad8471SEric Van Hensbergen && (v9ses->nodev == 0)) 1092bad8471SEric Van Hensbergen res |= S_IFIFO; 1102405669bSLatchesar Ionkov else if ((mode & P9_DMDEVICE) && (v9fs_extended(v9ses)) 1112bad8471SEric Van Hensbergen && (v9ses->nodev == 0)) 1122bad8471SEric Van Hensbergen res |= S_IFBLK; 1132bad8471SEric Van Hensbergen else 1142bad8471SEric Van Hensbergen res |= S_IFREG; 1152bad8471SEric Van Hensbergen 1162405669bSLatchesar Ionkov if (v9fs_extended(v9ses)) { 117bd238fb4SLatchesar Ionkov if ((mode & P9_DMSETUID) == P9_DMSETUID) 1182bad8471SEric Van Hensbergen res |= S_ISUID; 1192bad8471SEric Van Hensbergen 120bd238fb4SLatchesar Ionkov if ((mode & P9_DMSETGID) == P9_DMSETGID) 1212bad8471SEric Van Hensbergen res |= S_ISGID; 1222bad8471SEric Van Hensbergen } 1232bad8471SEric Van Hensbergen 1242bad8471SEric Van Hensbergen return res; 1252bad8471SEric Van Hensbergen } 1262bad8471SEric Van Hensbergen 1276a3124a3SLatchesar Ionkov int v9fs_uflags2omode(int uflags) 1286a3124a3SLatchesar Ionkov { 1296a3124a3SLatchesar Ionkov int ret; 1306a3124a3SLatchesar Ionkov 1316a3124a3SLatchesar Ionkov ret = 0; 1326a3124a3SLatchesar Ionkov switch (uflags&3) { 1336a3124a3SLatchesar Ionkov default: 1346a3124a3SLatchesar Ionkov case O_RDONLY: 135bd238fb4SLatchesar Ionkov ret = P9_OREAD; 1366a3124a3SLatchesar Ionkov break; 1376a3124a3SLatchesar Ionkov 1386a3124a3SLatchesar Ionkov case O_WRONLY: 139bd238fb4SLatchesar Ionkov ret = P9_OWRITE; 1406a3124a3SLatchesar Ionkov break; 1416a3124a3SLatchesar Ionkov 1426a3124a3SLatchesar Ionkov case O_RDWR: 143bd238fb4SLatchesar Ionkov ret = P9_ORDWR; 1446a3124a3SLatchesar Ionkov break; 1456a3124a3SLatchesar Ionkov } 1466a3124a3SLatchesar Ionkov 1476a3124a3SLatchesar Ionkov if (uflags & O_EXCL) 148bd238fb4SLatchesar Ionkov ret |= P9_OEXCL; 1496a3124a3SLatchesar Ionkov 1506a3124a3SLatchesar Ionkov if (uflags & O_TRUNC) 151bd238fb4SLatchesar Ionkov ret |= P9_OTRUNC; 1526a3124a3SLatchesar Ionkov 1536a3124a3SLatchesar Ionkov if (uflags & O_APPEND) 154bd238fb4SLatchesar Ionkov ret |= P9_OAPPEND; 1556a3124a3SLatchesar Ionkov 1566a3124a3SLatchesar Ionkov return ret; 1576a3124a3SLatchesar Ionkov } 1586a3124a3SLatchesar Ionkov 1592bad8471SEric Van Hensbergen /** 160531b1094SLatchesar Ionkov * v9fs_blank_wstat - helper function to setup a 9P stat structure 1612bad8471SEric Van Hensbergen * @v9ses: 9P session info (for determining extended mode) 162531b1094SLatchesar Ionkov * @wstat: structure to initialize 1632bad8471SEric Van Hensbergen * 1642bad8471SEric Van Hensbergen */ 1652bad8471SEric Van Hensbergen 16673c592b9SEric Van Hensbergen static void 167bd238fb4SLatchesar Ionkov v9fs_blank_wstat(struct p9_wstat *wstat) 1682bad8471SEric Van Hensbergen { 169531b1094SLatchesar Ionkov wstat->type = ~0; 170531b1094SLatchesar Ionkov wstat->dev = ~0; 171531b1094SLatchesar Ionkov wstat->qid.type = ~0; 172531b1094SLatchesar Ionkov wstat->qid.version = ~0; 173531b1094SLatchesar Ionkov *((long long *)&wstat->qid.path) = ~0; 174531b1094SLatchesar Ionkov wstat->mode = ~0; 175531b1094SLatchesar Ionkov wstat->atime = ~0; 176531b1094SLatchesar Ionkov wstat->mtime = ~0; 177531b1094SLatchesar Ionkov wstat->length = ~0; 178531b1094SLatchesar Ionkov wstat->name = NULL; 179531b1094SLatchesar Ionkov wstat->uid = NULL; 180531b1094SLatchesar Ionkov wstat->gid = NULL; 181531b1094SLatchesar Ionkov wstat->muid = NULL; 182531b1094SLatchesar Ionkov wstat->n_uid = ~0; 183531b1094SLatchesar Ionkov wstat->n_gid = ~0; 184531b1094SLatchesar Ionkov wstat->n_muid = ~0; 185531b1094SLatchesar Ionkov wstat->extension = NULL; 1862bad8471SEric Van Hensbergen } 1872bad8471SEric Van Hensbergen 1882bad8471SEric Van Hensbergen /** 1892bad8471SEric Van Hensbergen * v9fs_get_inode - helper function to setup an inode 1902bad8471SEric Van Hensbergen * @sb: superblock 1912bad8471SEric Van Hensbergen * @mode: mode to setup inode with 1922bad8471SEric Van Hensbergen * 1932bad8471SEric Van Hensbergen */ 1942bad8471SEric Van Hensbergen 1952bad8471SEric Van Hensbergen struct inode *v9fs_get_inode(struct super_block *sb, int mode) 1962bad8471SEric Van Hensbergen { 1976a3124a3SLatchesar Ionkov struct inode *inode; 198b501611aSEric Van Hensbergen struct v9fs_session_info *v9ses = sb->s_fs_info; 1992bad8471SEric Van Hensbergen 200bd238fb4SLatchesar Ionkov P9_DPRINTK(P9_DEBUG_VFS, "super block: %p mode: %o\n", sb, mode); 2012bad8471SEric Van Hensbergen 2022bad8471SEric Van Hensbergen inode = new_inode(sb); 2032bad8471SEric Van Hensbergen if (inode) { 2042bad8471SEric Van Hensbergen inode->i_mode = mode; 2052bad8471SEric Van Hensbergen inode->i_uid = current->fsuid; 2062bad8471SEric Van Hensbergen inode->i_gid = current->fsgid; 2072bad8471SEric Van Hensbergen inode->i_blocks = 0; 2082bad8471SEric Van Hensbergen inode->i_rdev = 0; 2092bad8471SEric Van Hensbergen inode->i_atime = inode->i_mtime = inode->i_ctime = CURRENT_TIME; 210147b31cfSEric Van Hensbergen inode->i_mapping->a_ops = &v9fs_addr_operations; 2112bad8471SEric Van Hensbergen 2122bad8471SEric Van Hensbergen switch (mode & S_IFMT) { 2132bad8471SEric Van Hensbergen case S_IFIFO: 2142bad8471SEric Van Hensbergen case S_IFBLK: 2152bad8471SEric Van Hensbergen case S_IFCHR: 2162bad8471SEric Van Hensbergen case S_IFSOCK: 2172405669bSLatchesar Ionkov if (!v9fs_extended(v9ses)) { 218bd238fb4SLatchesar Ionkov P9_DPRINTK(P9_DEBUG_ERROR, 219bd238fb4SLatchesar Ionkov "special files without extended mode\n"); 220b501611aSEric Van Hensbergen return ERR_PTR(-EINVAL); 221b501611aSEric Van Hensbergen } 2225d58bec5SEric Van Hensbergen init_special_inode(inode, inode->i_mode, 2235d58bec5SEric Van Hensbergen inode->i_rdev); 2245d58bec5SEric Van Hensbergen break; 2252bad8471SEric Van Hensbergen case S_IFREG: 2262bad8471SEric Van Hensbergen inode->i_op = &v9fs_file_inode_operations; 2272bad8471SEric Van Hensbergen inode->i_fop = &v9fs_file_operations; 2282bad8471SEric Van Hensbergen break; 229b501611aSEric Van Hensbergen case S_IFLNK: 2302405669bSLatchesar Ionkov if (!v9fs_extended(v9ses)) { 231bd238fb4SLatchesar Ionkov P9_DPRINTK(P9_DEBUG_ERROR, 232bd238fb4SLatchesar Ionkov "extended modes used w/o 9P2000.u\n"); 233b501611aSEric Van Hensbergen return ERR_PTR(-EINVAL); 234b501611aSEric Van Hensbergen } 235b501611aSEric Van Hensbergen inode->i_op = &v9fs_symlink_inode_operations; 236b501611aSEric Van Hensbergen break; 2372bad8471SEric Van Hensbergen case S_IFDIR: 238d8c76e6fSDave Hansen inc_nlink(inode); 2392405669bSLatchesar Ionkov if (v9fs_extended(v9ses)) 240b501611aSEric Van Hensbergen inode->i_op = &v9fs_dir_inode_operations_ext; 241b501611aSEric Van Hensbergen else 2422bad8471SEric Van Hensbergen inode->i_op = &v9fs_dir_inode_operations; 2432bad8471SEric Van Hensbergen inode->i_fop = &v9fs_dir_operations; 2442bad8471SEric Van Hensbergen break; 2452bad8471SEric Van Hensbergen default: 246bd238fb4SLatchesar Ionkov P9_DPRINTK(P9_DEBUG_ERROR, 247bd238fb4SLatchesar Ionkov "BAD mode 0x%x S_IFMT 0x%x\n", 2482bad8471SEric Van Hensbergen mode, mode & S_IFMT); 2492bad8471SEric Van Hensbergen return ERR_PTR(-EINVAL); 2502bad8471SEric Van Hensbergen } 2512bad8471SEric Van Hensbergen } else { 252bd238fb4SLatchesar Ionkov P9_EPRINTK(KERN_WARNING, "Problem allocating inode\n"); 2532bad8471SEric Van Hensbergen return ERR_PTR(-ENOMEM); 2542bad8471SEric Van Hensbergen } 2552bad8471SEric Van Hensbergen return inode; 2562bad8471SEric Van Hensbergen } 2572bad8471SEric Van Hensbergen 258bd238fb4SLatchesar Ionkov /* 2596a3124a3SLatchesar Ionkov static struct v9fs_fid* 2606a3124a3SLatchesar Ionkov v9fs_clone_walk(struct v9fs_session_info *v9ses, u32 fid, struct dentry *dentry) 2616a3124a3SLatchesar Ionkov { 2626a3124a3SLatchesar Ionkov int err; 263736c4b85SMika Kukkonen int nfid; 2646a3124a3SLatchesar Ionkov struct v9fs_fid *ret; 2656a3124a3SLatchesar Ionkov struct v9fs_fcall *fcall; 2660b8dd177SLatchesar Ionkov 2676a3124a3SLatchesar Ionkov nfid = v9fs_get_idpool(&v9ses->fidpool); 2686a3124a3SLatchesar Ionkov if (nfid < 0) { 2690b8dd177SLatchesar Ionkov eprintk(KERN_WARNING, "no free fids available\n"); 270731805b4SLatchesar Ionkov return ERR_PTR(-ENOSPC); 2710b8dd177SLatchesar Ionkov } 2720b8dd177SLatchesar Ionkov 2736a3124a3SLatchesar Ionkov err = v9fs_t_walk(v9ses, fid, nfid, (char *) dentry->d_name.name, 2746a3124a3SLatchesar Ionkov &fcall); 2756a3124a3SLatchesar Ionkov 2766a3124a3SLatchesar Ionkov if (err < 0) { 27741e5a6acSLatchesar Ionkov if (fcall && fcall->id == RWALK) 27841e5a6acSLatchesar Ionkov goto clunk_fid; 27941e5a6acSLatchesar Ionkov 2806a3124a3SLatchesar Ionkov PRINT_FCALL_ERROR("walk error", fcall); 2816a3124a3SLatchesar Ionkov v9fs_put_idpool(nfid, &v9ses->fidpool); 2826a3124a3SLatchesar Ionkov goto error; 2830b8dd177SLatchesar Ionkov } 2846a3124a3SLatchesar Ionkov 2853cf6429aSLatchesar Ionkov kfree(fcall); 2863cf6429aSLatchesar Ionkov fcall = NULL; 2876a3124a3SLatchesar Ionkov ret = v9fs_fid_create(v9ses, nfid); 2886a3124a3SLatchesar Ionkov if (!ret) { 2896a3124a3SLatchesar Ionkov err = -ENOMEM; 2906a3124a3SLatchesar Ionkov goto clunk_fid; 2910b8dd177SLatchesar Ionkov } 2922bad8471SEric Van Hensbergen 2936a3124a3SLatchesar Ionkov err = v9fs_fid_insert(ret, dentry); 2946a3124a3SLatchesar Ionkov if (err < 0) { 2956a3124a3SLatchesar Ionkov v9fs_fid_destroy(ret); 2966a3124a3SLatchesar Ionkov goto clunk_fid; 2976a3124a3SLatchesar Ionkov } 2982bad8471SEric Van Hensbergen 2996a3124a3SLatchesar Ionkov return ret; 3006a3124a3SLatchesar Ionkov 3016a3124a3SLatchesar Ionkov clunk_fid: 3026a3124a3SLatchesar Ionkov v9fs_t_clunk(v9ses, nfid); 3036a3124a3SLatchesar Ionkov 3046a3124a3SLatchesar Ionkov error: 3056a3124a3SLatchesar Ionkov kfree(fcall); 3066a3124a3SLatchesar Ionkov return ERR_PTR(err); 3076a3124a3SLatchesar Ionkov } 308bd238fb4SLatchesar Ionkov */ 3096a3124a3SLatchesar Ionkov 3105174fdabSLatchesar Ionkov static struct inode * 311bd238fb4SLatchesar Ionkov v9fs_inode_from_fid(struct v9fs_session_info *v9ses, struct p9_fid *fid, 3126a3124a3SLatchesar Ionkov struct super_block *sb) 3136a3124a3SLatchesar Ionkov { 3146a3124a3SLatchesar Ionkov int err, umode; 3156a3124a3SLatchesar Ionkov struct inode *ret; 316bd238fb4SLatchesar Ionkov struct p9_stat *st; 3176a3124a3SLatchesar Ionkov 3186a3124a3SLatchesar Ionkov ret = NULL; 319bd238fb4SLatchesar Ionkov st = p9_client_stat(fid); 320bd238fb4SLatchesar Ionkov if (IS_ERR(st)) { 321bd238fb4SLatchesar Ionkov err = PTR_ERR(st); 322bd238fb4SLatchesar Ionkov st = NULL; 3236a3124a3SLatchesar Ionkov goto error; 3242bad8471SEric Van Hensbergen } 3252bad8471SEric Van Hensbergen 326bd238fb4SLatchesar Ionkov umode = p9mode2unixmode(v9ses, st->mode); 3276a3124a3SLatchesar Ionkov ret = v9fs_get_inode(sb, umode); 3286a3124a3SLatchesar Ionkov if (IS_ERR(ret)) { 3296a3124a3SLatchesar Ionkov err = PTR_ERR(ret); 3306a3124a3SLatchesar Ionkov ret = NULL; 3316a3124a3SLatchesar Ionkov goto error; 3322bad8471SEric Van Hensbergen } 3332bad8471SEric Van Hensbergen 334bd238fb4SLatchesar Ionkov v9fs_stat2inode(st, ret, sb); 335bd238fb4SLatchesar Ionkov ret->i_ino = v9fs_qid2ino(&st->qid); 336bd238fb4SLatchesar Ionkov kfree(st); 3376a3124a3SLatchesar Ionkov return ret; 3382bad8471SEric Van Hensbergen 3396a3124a3SLatchesar Ionkov error: 340bd238fb4SLatchesar Ionkov kfree(st); 3416a3124a3SLatchesar Ionkov if (ret) 3426a3124a3SLatchesar Ionkov iput(ret); 3432bad8471SEric Van Hensbergen 3446a3124a3SLatchesar Ionkov return ERR_PTR(err); 3452bad8471SEric Van Hensbergen } 3462bad8471SEric Van Hensbergen 3472bad8471SEric Van Hensbergen /** 3482bad8471SEric Van Hensbergen * v9fs_remove - helper function to remove files and directories 34973c592b9SEric Van Hensbergen * @dir: directory inode that is being deleted 35073c592b9SEric Van Hensbergen * @file: dentry that is being deleted 35173c592b9SEric Van Hensbergen * @rmdir: removing a directory 3522bad8471SEric Van Hensbergen * 3532bad8471SEric Van Hensbergen */ 3542bad8471SEric Van Hensbergen 3552bad8471SEric Van Hensbergen static int v9fs_remove(struct inode *dir, struct dentry *file, int rmdir) 3562bad8471SEric Van Hensbergen { 357bd238fb4SLatchesar Ionkov struct inode *file_inode; 358bd238fb4SLatchesar Ionkov struct v9fs_session_info *v9ses; 359bd238fb4SLatchesar Ionkov struct p9_fid *v9fid; 3602bad8471SEric Van Hensbergen 361bd238fb4SLatchesar Ionkov P9_DPRINTK(P9_DEBUG_VFS, "inode: %p dentry: %p rmdir: %d\n", dir, file, 3622bad8471SEric Van Hensbergen rmdir); 3632bad8471SEric Van Hensbergen 3642bad8471SEric Van Hensbergen file_inode = file->d_inode; 3652bad8471SEric Van Hensbergen v9ses = v9fs_inode2v9ses(file_inode); 366c959df9fSLatchesar Ionkov v9fid = v9fs_fid_clone(file); 367da977b2cSEric Van Hensbergen if (IS_ERR(v9fid)) 368da977b2cSEric Van Hensbergen return PTR_ERR(v9fid); 3692bad8471SEric Van Hensbergen 370bd238fb4SLatchesar Ionkov return p9_client_remove(v9fid); 3712bad8471SEric Van Hensbergen } 3722bad8471SEric Van Hensbergen 3736a3124a3SLatchesar Ionkov static int 3746a3124a3SLatchesar Ionkov v9fs_open_created(struct inode *inode, struct file *file) 3756a3124a3SLatchesar Ionkov { 3766a3124a3SLatchesar Ionkov return 0; 3776a3124a3SLatchesar Ionkov } 3786a3124a3SLatchesar Ionkov 379bd238fb4SLatchesar Ionkov 380bd238fb4SLatchesar Ionkov /** 381bd238fb4SLatchesar Ionkov * v9fs_create - Create a file 382bd238fb4SLatchesar Ionkov * @dentry: dentry that is being created 383bd238fb4SLatchesar Ionkov * @perm: create permissions 384bd238fb4SLatchesar Ionkov * @mode: open mode 385bd238fb4SLatchesar Ionkov * 386bd238fb4SLatchesar Ionkov */ 387bd238fb4SLatchesar Ionkov static struct p9_fid * 388bd238fb4SLatchesar Ionkov v9fs_create(struct v9fs_session_info *v9ses, struct inode *dir, 389bd238fb4SLatchesar Ionkov struct dentry *dentry, char *extension, u32 perm, u8 mode) 390bd238fb4SLatchesar Ionkov { 391bd238fb4SLatchesar Ionkov int err; 392bd238fb4SLatchesar Ionkov char *name; 393bd238fb4SLatchesar Ionkov struct p9_fid *dfid, *ofid, *fid; 394bd238fb4SLatchesar Ionkov struct inode *inode; 395bd238fb4SLatchesar Ionkov 396bd238fb4SLatchesar Ionkov err = 0; 397bd238fb4SLatchesar Ionkov ofid = NULL; 398bd238fb4SLatchesar Ionkov fid = NULL; 399bd238fb4SLatchesar Ionkov name = (char *) dentry->d_name.name; 400bd238fb4SLatchesar Ionkov dfid = v9fs_fid_clone(dentry->d_parent); 401bd238fb4SLatchesar Ionkov if (IS_ERR(dfid)) { 402bd238fb4SLatchesar Ionkov err = PTR_ERR(dfid); 403bd238fb4SLatchesar Ionkov dfid = NULL; 404bd238fb4SLatchesar Ionkov goto error; 405bd238fb4SLatchesar Ionkov } 406bd238fb4SLatchesar Ionkov 407bd238fb4SLatchesar Ionkov /* clone a fid to use for creation */ 408bd238fb4SLatchesar Ionkov ofid = p9_client_walk(dfid, 0, NULL, 1); 409bd238fb4SLatchesar Ionkov if (IS_ERR(ofid)) { 410bd238fb4SLatchesar Ionkov err = PTR_ERR(ofid); 411bd238fb4SLatchesar Ionkov ofid = NULL; 412bd238fb4SLatchesar Ionkov goto error; 413bd238fb4SLatchesar Ionkov } 414bd238fb4SLatchesar Ionkov 415bd238fb4SLatchesar Ionkov err = p9_client_fcreate(ofid, name, perm, mode, extension); 416bd238fb4SLatchesar Ionkov if (err < 0) 417bd238fb4SLatchesar Ionkov goto error; 418bd238fb4SLatchesar Ionkov 419bd238fb4SLatchesar Ionkov /* now walk from the parent so we can get unopened fid */ 420bd238fb4SLatchesar Ionkov fid = p9_client_walk(dfid, 1, &name, 0); 421bd238fb4SLatchesar Ionkov if (IS_ERR(fid)) { 422bd238fb4SLatchesar Ionkov err = PTR_ERR(fid); 423bd238fb4SLatchesar Ionkov fid = NULL; 424bd238fb4SLatchesar Ionkov goto error; 425bd238fb4SLatchesar Ionkov } else 426bd238fb4SLatchesar Ionkov dfid = NULL; 427bd238fb4SLatchesar Ionkov 428bd238fb4SLatchesar Ionkov /* instantiate inode and assign the unopened fid to the dentry */ 429bd238fb4SLatchesar Ionkov inode = v9fs_inode_from_fid(v9ses, fid, dir->i_sb); 430bd238fb4SLatchesar Ionkov if (IS_ERR(inode)) { 431bd238fb4SLatchesar Ionkov err = PTR_ERR(inode); 432bd238fb4SLatchesar Ionkov goto error; 433bd238fb4SLatchesar Ionkov } 434bd238fb4SLatchesar Ionkov 435bd238fb4SLatchesar Ionkov if (v9ses->cache) 436bd238fb4SLatchesar Ionkov dentry->d_op = &v9fs_cached_dentry_operations; 437bd238fb4SLatchesar Ionkov else 438bd238fb4SLatchesar Ionkov dentry->d_op = &v9fs_dentry_operations; 439bd238fb4SLatchesar Ionkov 440bd238fb4SLatchesar Ionkov d_instantiate(dentry, inode); 441bd238fb4SLatchesar Ionkov v9fs_fid_add(dentry, fid); 442bd238fb4SLatchesar Ionkov return ofid; 443bd238fb4SLatchesar Ionkov 444bd238fb4SLatchesar Ionkov error: 445bd238fb4SLatchesar Ionkov if (dfid) 446bd238fb4SLatchesar Ionkov p9_client_clunk(dfid); 447bd238fb4SLatchesar Ionkov 448bd238fb4SLatchesar Ionkov if (ofid) 449bd238fb4SLatchesar Ionkov p9_client_clunk(ofid); 450bd238fb4SLatchesar Ionkov 451bd238fb4SLatchesar Ionkov if (fid) 452bd238fb4SLatchesar Ionkov p9_client_clunk(fid); 453bd238fb4SLatchesar Ionkov 454bd238fb4SLatchesar Ionkov return ERR_PTR(err); 455bd238fb4SLatchesar Ionkov } 456bd238fb4SLatchesar Ionkov 4572bad8471SEric Van Hensbergen /** 4582bad8471SEric Van Hensbergen * v9fs_vfs_create - VFS hook to create files 459bd238fb4SLatchesar Ionkov * @inode: directory inode that is being created 4602bad8471SEric Van Hensbergen * @dentry: dentry that is being deleted 4616a3124a3SLatchesar Ionkov * @mode: create permissions 4622bad8471SEric Van Hensbergen * @nd: path information 4632bad8471SEric Van Hensbergen * 4642bad8471SEric Van Hensbergen */ 4652bad8471SEric Van Hensbergen 4662bad8471SEric Van Hensbergen static int 4676a3124a3SLatchesar Ionkov v9fs_vfs_create(struct inode *dir, struct dentry *dentry, int mode, 4682bad8471SEric Van Hensbergen struct nameidata *nd) 4692bad8471SEric Van Hensbergen { 4706a3124a3SLatchesar Ionkov int err; 471bd238fb4SLatchesar Ionkov u32 perm; 4726a3124a3SLatchesar Ionkov int flags; 4736a3124a3SLatchesar Ionkov struct v9fs_session_info *v9ses; 474bd238fb4SLatchesar Ionkov struct p9_fid *fid; 4756a3124a3SLatchesar Ionkov struct file *filp; 4766a3124a3SLatchesar Ionkov 477bd238fb4SLatchesar Ionkov err = 0; 478bd238fb4SLatchesar Ionkov fid = NULL; 4796a3124a3SLatchesar Ionkov v9ses = v9fs_inode2v9ses(dir); 480da977b2cSEric Van Hensbergen perm = unixmode2p9mode(v9ses, mode); 4816a3124a3SLatchesar Ionkov if (nd && nd->flags & LOOKUP_OPEN) 4826a3124a3SLatchesar Ionkov flags = nd->intent.open.flags - 1; 4836a3124a3SLatchesar Ionkov else 4846a3124a3SLatchesar Ionkov flags = O_RDWR; 4856a3124a3SLatchesar Ionkov 486bd238fb4SLatchesar Ionkov fid = v9fs_create(v9ses, dir, dentry, NULL, perm, 487bd238fb4SLatchesar Ionkov v9fs_uflags2omode(flags)); 488bd238fb4SLatchesar Ionkov if (IS_ERR(fid)) { 489bd238fb4SLatchesar Ionkov err = PTR_ERR(fid); 490bd238fb4SLatchesar Ionkov fid = NULL; 4916a3124a3SLatchesar Ionkov goto error; 4926a3124a3SLatchesar Ionkov } 4936a3124a3SLatchesar Ionkov 494bd238fb4SLatchesar Ionkov /* if we are opening a file, assign the open fid to the file */ 4956a3124a3SLatchesar Ionkov if (nd && nd->flags & LOOKUP_OPEN) { 4966a3124a3SLatchesar Ionkov filp = lookup_instantiate_filp(nd, dentry, v9fs_open_created); 4976a3124a3SLatchesar Ionkov if (IS_ERR(filp)) { 498bd238fb4SLatchesar Ionkov err = PTR_ERR(filp); 499bd238fb4SLatchesar Ionkov goto error; 5006a3124a3SLatchesar Ionkov } 5016a3124a3SLatchesar Ionkov 502bd238fb4SLatchesar Ionkov filp->private_data = fid; 503bd238fb4SLatchesar Ionkov } else 504bd238fb4SLatchesar Ionkov p9_client_clunk(fid); 5056a3124a3SLatchesar Ionkov 5066a3124a3SLatchesar Ionkov return 0; 5076a3124a3SLatchesar Ionkov 5086a3124a3SLatchesar Ionkov error: 509bd238fb4SLatchesar Ionkov if (fid) 510bd238fb4SLatchesar Ionkov p9_client_clunk(fid); 5116a3124a3SLatchesar Ionkov 5126a3124a3SLatchesar Ionkov return err; 5132bad8471SEric Van Hensbergen } 5142bad8471SEric Van Hensbergen 5152bad8471SEric Van Hensbergen /** 5162bad8471SEric Van Hensbergen * v9fs_vfs_mkdir - VFS mkdir hook to create a directory 51773c592b9SEric Van Hensbergen * @inode: inode that is being unlinked 5182bad8471SEric Van Hensbergen * @dentry: dentry that is being unlinked 5192bad8471SEric Van Hensbergen * @mode: mode for new directory 5202bad8471SEric Van Hensbergen * 5212bad8471SEric Van Hensbergen */ 5222bad8471SEric Van Hensbergen 5236a3124a3SLatchesar Ionkov static int v9fs_vfs_mkdir(struct inode *dir, struct dentry *dentry, int mode) 5242bad8471SEric Van Hensbergen { 5256a3124a3SLatchesar Ionkov int err; 526bd238fb4SLatchesar Ionkov u32 perm; 5276a3124a3SLatchesar Ionkov struct v9fs_session_info *v9ses; 528bd238fb4SLatchesar Ionkov struct p9_fid *fid; 5296a3124a3SLatchesar Ionkov 530bd238fb4SLatchesar Ionkov P9_DPRINTK(P9_DEBUG_VFS, "name %s\n", dentry->d_name.name); 531bd238fb4SLatchesar Ionkov err = 0; 5326a3124a3SLatchesar Ionkov v9ses = v9fs_inode2v9ses(dir); 5336a3124a3SLatchesar Ionkov perm = unixmode2p9mode(v9ses, mode | S_IFDIR); 534bd238fb4SLatchesar Ionkov fid = v9fs_create(v9ses, dir, dentry, NULL, perm, P9_OREAD); 535bd238fb4SLatchesar Ionkov if (IS_ERR(fid)) { 536bd238fb4SLatchesar Ionkov err = PTR_ERR(fid); 537bd238fb4SLatchesar Ionkov fid = NULL; 5386a3124a3SLatchesar Ionkov } 5396a3124a3SLatchesar Ionkov 540bd238fb4SLatchesar Ionkov if (fid) 541bd238fb4SLatchesar Ionkov p9_client_clunk(fid); 5426a3124a3SLatchesar Ionkov 5436a3124a3SLatchesar Ionkov return err; 5442bad8471SEric Van Hensbergen } 5452bad8471SEric Van Hensbergen 5462bad8471SEric Van Hensbergen /** 5472bad8471SEric Van Hensbergen * v9fs_vfs_lookup - VFS lookup hook to "walk" to a new inode 5482bad8471SEric Van Hensbergen * @dir: inode that is being walked from 5492bad8471SEric Van Hensbergen * @dentry: dentry that is being walked to? 5502bad8471SEric Van Hensbergen * @nameidata: path data 5512bad8471SEric Van Hensbergen * 5522bad8471SEric Van Hensbergen */ 5532bad8471SEric Van Hensbergen 5542bad8471SEric Van Hensbergen static struct dentry *v9fs_vfs_lookup(struct inode *dir, struct dentry *dentry, 5552bad8471SEric Van Hensbergen struct nameidata *nameidata) 5562bad8471SEric Van Hensbergen { 5572bad8471SEric Van Hensbergen struct super_block *sb; 5582bad8471SEric Van Hensbergen struct v9fs_session_info *v9ses; 559bd238fb4SLatchesar Ionkov struct p9_fid *dfid, *fid; 5602bad8471SEric Van Hensbergen struct inode *inode; 561bd238fb4SLatchesar Ionkov char *name; 5622bad8471SEric Van Hensbergen int result = 0; 5632bad8471SEric Van Hensbergen 564bd238fb4SLatchesar Ionkov P9_DPRINTK(P9_DEBUG_VFS, "dir: %p dentry: (%s) %p nameidata: %p\n", 565731805b4SLatchesar Ionkov dir, dentry->d_name.name, dentry, nameidata); 5662bad8471SEric Van Hensbergen 5672bad8471SEric Van Hensbergen sb = dir->i_sb; 5682bad8471SEric Van Hensbergen v9ses = v9fs_inode2v9ses(dir); 569bd238fb4SLatchesar Ionkov dfid = v9fs_fid_lookup(dentry->d_parent); 570bd238fb4SLatchesar Ionkov if (IS_ERR(dfid)) 571bd238fb4SLatchesar Ionkov return ERR_PTR(PTR_ERR(dfid)); 5722bad8471SEric Van Hensbergen 573bd238fb4SLatchesar Ionkov name = (char *) dentry->d_name.name; 574bd238fb4SLatchesar Ionkov fid = p9_client_walk(dfid, 1, &name, 1); 575bd238fb4SLatchesar Ionkov if (IS_ERR(fid)) { 576bd238fb4SLatchesar Ionkov result = PTR_ERR(fid); 5772bad8471SEric Van Hensbergen if (result == -ENOENT) { 5782bad8471SEric Van Hensbergen d_add(dentry, NULL); 5792bad8471SEric Van Hensbergen return NULL; 5802bad8471SEric Van Hensbergen } 5812bad8471SEric Van Hensbergen 582bd238fb4SLatchesar Ionkov return ERR_PTR(result); 5832bad8471SEric Van Hensbergen } 5842bad8471SEric Van Hensbergen 585bd238fb4SLatchesar Ionkov inode = v9fs_inode_from_fid(v9ses, fid, dir->i_sb); 586bd238fb4SLatchesar Ionkov if (IS_ERR(inode)) { 587bd238fb4SLatchesar Ionkov result = PTR_ERR(inode); 588bd238fb4SLatchesar Ionkov inode = NULL; 589bd238fb4SLatchesar Ionkov goto error; 5902bad8471SEric Van Hensbergen } 5912bad8471SEric Van Hensbergen 592bd238fb4SLatchesar Ionkov result = v9fs_fid_add(dentry, fid); 5936a3124a3SLatchesar Ionkov if (result < 0) 594bd238fb4SLatchesar Ionkov goto error; 5956a3124a3SLatchesar Ionkov 596e03abc0cSEric Van Hensbergen if ((fid->qid.version) && (v9ses->cache)) 597e03abc0cSEric Van Hensbergen dentry->d_op = &v9fs_cached_dentry_operations; 598e03abc0cSEric Van Hensbergen else 599e03abc0cSEric Van Hensbergen dentry->d_op = &v9fs_dentry_operations; 6002bad8471SEric Van Hensbergen 6012bad8471SEric Van Hensbergen d_add(dentry, inode); 6022bad8471SEric Van Hensbergen return NULL; 6032bad8471SEric Van Hensbergen 604bd238fb4SLatchesar Ionkov error: 605bd238fb4SLatchesar Ionkov if (fid) 606bd238fb4SLatchesar Ionkov p9_client_clunk(fid); 607da977b2cSEric Van Hensbergen 6082bad8471SEric Van Hensbergen return ERR_PTR(result); 6092bad8471SEric Van Hensbergen } 6102bad8471SEric Van Hensbergen 6112bad8471SEric Van Hensbergen /** 6122bad8471SEric Van Hensbergen * v9fs_vfs_unlink - VFS unlink hook to delete an inode 6132bad8471SEric Van Hensbergen * @i: inode that is being unlinked 61473c592b9SEric Van Hensbergen * @d: dentry that is being unlinked 6152bad8471SEric Van Hensbergen * 6162bad8471SEric Van Hensbergen */ 6172bad8471SEric Van Hensbergen 6182bad8471SEric Van Hensbergen static int v9fs_vfs_unlink(struct inode *i, struct dentry *d) 6192bad8471SEric Van Hensbergen { 6202bad8471SEric Van Hensbergen return v9fs_remove(i, d, 0); 6212bad8471SEric Van Hensbergen } 6222bad8471SEric Van Hensbergen 6232bad8471SEric Van Hensbergen /** 6242bad8471SEric Van Hensbergen * v9fs_vfs_rmdir - VFS unlink hook to delete a directory 6252bad8471SEric Van Hensbergen * @i: inode that is being unlinked 62673c592b9SEric Van Hensbergen * @d: dentry that is being unlinked 6272bad8471SEric Van Hensbergen * 6282bad8471SEric Van Hensbergen */ 6292bad8471SEric Van Hensbergen 6302bad8471SEric Van Hensbergen static int v9fs_vfs_rmdir(struct inode *i, struct dentry *d) 6312bad8471SEric Van Hensbergen { 6322bad8471SEric Van Hensbergen return v9fs_remove(i, d, 1); 6332bad8471SEric Van Hensbergen } 6342bad8471SEric Van Hensbergen 6352bad8471SEric Van Hensbergen /** 6362bad8471SEric Van Hensbergen * v9fs_vfs_rename - VFS hook to rename an inode 6372bad8471SEric Van Hensbergen * @old_dir: old dir inode 6382bad8471SEric Van Hensbergen * @old_dentry: old dentry 6392bad8471SEric Van Hensbergen * @new_dir: new dir inode 6402bad8471SEric Van Hensbergen * @new_dentry: new dentry 6412bad8471SEric Van Hensbergen * 6422bad8471SEric Van Hensbergen */ 6432bad8471SEric Van Hensbergen 6442bad8471SEric Van Hensbergen static int 6452bad8471SEric Van Hensbergen v9fs_vfs_rename(struct inode *old_dir, struct dentry *old_dentry, 6462bad8471SEric Van Hensbergen struct inode *new_dir, struct dentry *new_dentry) 6472bad8471SEric Van Hensbergen { 648bd238fb4SLatchesar Ionkov struct inode *old_inode; 649bd238fb4SLatchesar Ionkov struct v9fs_session_info *v9ses; 650bd238fb4SLatchesar Ionkov struct p9_fid *oldfid; 651bd238fb4SLatchesar Ionkov struct p9_fid *olddirfid; 652bd238fb4SLatchesar Ionkov struct p9_fid *newdirfid; 653bd238fb4SLatchesar Ionkov struct p9_wstat wstat; 654bd238fb4SLatchesar Ionkov int retval; 6552bad8471SEric Van Hensbergen 656bd238fb4SLatchesar Ionkov P9_DPRINTK(P9_DEBUG_VFS, "\n"); 657bd238fb4SLatchesar Ionkov retval = 0; 658bd238fb4SLatchesar Ionkov old_inode = old_dentry->d_inode; 659bd238fb4SLatchesar Ionkov v9ses = v9fs_inode2v9ses(old_inode); 660bd238fb4SLatchesar Ionkov oldfid = v9fs_fid_lookup(old_dentry); 661da977b2cSEric Van Hensbergen if (IS_ERR(oldfid)) 662da977b2cSEric Van Hensbergen return PTR_ERR(oldfid); 663da977b2cSEric Van Hensbergen 664da977b2cSEric Van Hensbergen olddirfid = v9fs_fid_clone(old_dentry->d_parent); 665da977b2cSEric Van Hensbergen if (IS_ERR(olddirfid)) { 666da977b2cSEric Van Hensbergen retval = PTR_ERR(olddirfid); 667bd238fb4SLatchesar Ionkov goto done; 668da977b2cSEric Van Hensbergen } 669da977b2cSEric Van Hensbergen 670da977b2cSEric Van Hensbergen newdirfid = v9fs_fid_clone(new_dentry->d_parent); 671da977b2cSEric Van Hensbergen if (IS_ERR(newdirfid)) { 672da977b2cSEric Van Hensbergen retval = PTR_ERR(newdirfid); 673bd238fb4SLatchesar Ionkov goto clunk_olddir; 6742bad8471SEric Van Hensbergen } 6752bad8471SEric Van Hensbergen 6762bad8471SEric Van Hensbergen /* 9P can only handle file rename in the same directory */ 6772bad8471SEric Van Hensbergen if (memcmp(&olddirfid->qid, &newdirfid->qid, sizeof(newdirfid->qid))) { 678bd238fb4SLatchesar Ionkov P9_DPRINTK(P9_DEBUG_ERROR, 679bd238fb4SLatchesar Ionkov "old dir and new dir are different\n"); 680621997cdSEric Van Hensbergen retval = -EXDEV; 681bd238fb4SLatchesar Ionkov goto clunk_newdir; 6822bad8471SEric Van Hensbergen } 6832bad8471SEric Van Hensbergen 684531b1094SLatchesar Ionkov v9fs_blank_wstat(&wstat); 685ba17674fSLatchesar Ionkov wstat.muid = v9ses->uname; 686531b1094SLatchesar Ionkov wstat.name = (char *) new_dentry->d_name.name; 687bd238fb4SLatchesar Ionkov retval = p9_client_wstat(oldfid, &wstat); 6882bad8471SEric Van Hensbergen 689bd238fb4SLatchesar Ionkov clunk_newdir: 69022150c4fSLatchesar Ionkov p9_client_clunk(newdirfid); 6912bad8471SEric Van Hensbergen 692bd238fb4SLatchesar Ionkov clunk_olddir: 69322150c4fSLatchesar Ionkov p9_client_clunk(olddirfid); 6942bad8471SEric Van Hensbergen 695bd238fb4SLatchesar Ionkov done: 6962bad8471SEric Van Hensbergen return retval; 6972bad8471SEric Van Hensbergen } 6982bad8471SEric Van Hensbergen 6992bad8471SEric Van Hensbergen /** 700943ffb58SAdrian Bunk * v9fs_vfs_getattr - retrieve file metadata 7012bad8471SEric Van Hensbergen * @mnt - mount information 7022bad8471SEric Van Hensbergen * @dentry - file to get attributes on 7032bad8471SEric Van Hensbergen * @stat - metadata structure to populate 7042bad8471SEric Van Hensbergen * 7052bad8471SEric Van Hensbergen */ 7062bad8471SEric Van Hensbergen 7072bad8471SEric Van Hensbergen static int 7082bad8471SEric Van Hensbergen v9fs_vfs_getattr(struct vfsmount *mnt, struct dentry *dentry, 7092bad8471SEric Van Hensbergen struct kstat *stat) 7102bad8471SEric Van Hensbergen { 711bd238fb4SLatchesar Ionkov int err; 712bd238fb4SLatchesar Ionkov struct v9fs_session_info *v9ses; 713bd238fb4SLatchesar Ionkov struct p9_fid *fid; 714bd238fb4SLatchesar Ionkov struct p9_stat *st; 7152bad8471SEric Van Hensbergen 716bd238fb4SLatchesar Ionkov P9_DPRINTK(P9_DEBUG_VFS, "dentry: %p\n", dentry); 717bd238fb4SLatchesar Ionkov err = -EPERM; 718bd238fb4SLatchesar Ionkov v9ses = v9fs_inode2v9ses(dentry->d_inode); 7199523a841SEric Van Hensbergen if (v9ses->cache == CACHE_LOOSE) 7209523a841SEric Van Hensbergen return simple_getattr(mnt, dentry, stat); 7219523a841SEric Van Hensbergen 722bd238fb4SLatchesar Ionkov fid = v9fs_fid_lookup(dentry); 723da977b2cSEric Van Hensbergen if (IS_ERR(fid)) 724da977b2cSEric Van Hensbergen return PTR_ERR(fid); 7252bad8471SEric Van Hensbergen 726bd238fb4SLatchesar Ionkov st = p9_client_stat(fid); 727bd238fb4SLatchesar Ionkov if (IS_ERR(st)) 728bd238fb4SLatchesar Ionkov return PTR_ERR(st); 7292bad8471SEric Van Hensbergen 730bd238fb4SLatchesar Ionkov v9fs_stat2inode(st, dentry->d_inode, dentry->d_inode->i_sb); 7312bad8471SEric Van Hensbergen generic_fillattr(dentry->d_inode, stat); 7322bad8471SEric Van Hensbergen 733bd238fb4SLatchesar Ionkov kfree(st); 734bd238fb4SLatchesar Ionkov return 0; 7352bad8471SEric Van Hensbergen } 7362bad8471SEric Van Hensbergen 7372bad8471SEric Van Hensbergen /** 7382bad8471SEric Van Hensbergen * v9fs_vfs_setattr - set file metadata 7392bad8471SEric Van Hensbergen * @dentry: file whose metadata to set 7402bad8471SEric Van Hensbergen * @iattr: metadata assignment structure 7412bad8471SEric Van Hensbergen * 7422bad8471SEric Van Hensbergen */ 7432bad8471SEric Van Hensbergen 7442bad8471SEric Van Hensbergen static int v9fs_vfs_setattr(struct dentry *dentry, struct iattr *iattr) 7452bad8471SEric Van Hensbergen { 746bd238fb4SLatchesar Ionkov int retval; 747bd238fb4SLatchesar Ionkov struct v9fs_session_info *v9ses; 748bd238fb4SLatchesar Ionkov struct p9_fid *fid; 749bd238fb4SLatchesar Ionkov struct p9_wstat wstat; 7502bad8471SEric Van Hensbergen 751bd238fb4SLatchesar Ionkov P9_DPRINTK(P9_DEBUG_VFS, "\n"); 752bd238fb4SLatchesar Ionkov retval = -EPERM; 753bd238fb4SLatchesar Ionkov v9ses = v9fs_inode2v9ses(dentry->d_inode); 754bd238fb4SLatchesar Ionkov fid = v9fs_fid_lookup(dentry); 755da977b2cSEric Van Hensbergen if(IS_ERR(fid)) 756da977b2cSEric Van Hensbergen return PTR_ERR(fid); 7572bad8471SEric Van Hensbergen 758531b1094SLatchesar Ionkov v9fs_blank_wstat(&wstat); 7592bad8471SEric Van Hensbergen if (iattr->ia_valid & ATTR_MODE) 760531b1094SLatchesar Ionkov wstat.mode = unixmode2p9mode(v9ses, iattr->ia_mode); 7612bad8471SEric Van Hensbergen 7622bad8471SEric Van Hensbergen if (iattr->ia_valid & ATTR_MTIME) 763531b1094SLatchesar Ionkov wstat.mtime = iattr->ia_mtime.tv_sec; 7642bad8471SEric Van Hensbergen 7652bad8471SEric Van Hensbergen if (iattr->ia_valid & ATTR_ATIME) 766531b1094SLatchesar Ionkov wstat.atime = iattr->ia_atime.tv_sec; 7672bad8471SEric Van Hensbergen 7682bad8471SEric Van Hensbergen if (iattr->ia_valid & ATTR_SIZE) 769531b1094SLatchesar Ionkov wstat.length = iattr->ia_size; 7702bad8471SEric Van Hensbergen 7712405669bSLatchesar Ionkov if (v9fs_extended(v9ses)) { 772531b1094SLatchesar Ionkov if (iattr->ia_valid & ATTR_UID) 773531b1094SLatchesar Ionkov wstat.n_uid = iattr->ia_uid; 7742bad8471SEric Van Hensbergen 775531b1094SLatchesar Ionkov if (iattr->ia_valid & ATTR_GID) 776531b1094SLatchesar Ionkov wstat.n_gid = iattr->ia_gid; 7772bad8471SEric Van Hensbergen } 7782bad8471SEric Van Hensbergen 779bd238fb4SLatchesar Ionkov retval = p9_client_wstat(fid, &wstat); 780bd238fb4SLatchesar Ionkov if (retval >= 0) 781bd238fb4SLatchesar Ionkov retval = inode_setattr(dentry->d_inode, iattr); 7822bad8471SEric Van Hensbergen 783bd238fb4SLatchesar Ionkov return retval; 7842bad8471SEric Van Hensbergen } 7852bad8471SEric Van Hensbergen 7862bad8471SEric Van Hensbergen /** 787531b1094SLatchesar Ionkov * v9fs_stat2inode - populate an inode structure with mistat info 788531b1094SLatchesar Ionkov * @stat: Plan 9 metadata (mistat) structure 7892bad8471SEric Van Hensbergen * @inode: inode to populate 7902bad8471SEric Van Hensbergen * @sb: superblock of filesystem 7912bad8471SEric Van Hensbergen * 7922bad8471SEric Van Hensbergen */ 7932bad8471SEric Van Hensbergen 7942bad8471SEric Van Hensbergen void 795bd238fb4SLatchesar Ionkov v9fs_stat2inode(struct p9_stat *stat, struct inode *inode, 7962bad8471SEric Van Hensbergen struct super_block *sb) 7972bad8471SEric Van Hensbergen { 7981dac06b2SLatchesar Ionkov int n; 799531b1094SLatchesar Ionkov char ext[32]; 8002bad8471SEric Van Hensbergen struct v9fs_session_info *v9ses = sb->s_fs_info; 8012bad8471SEric Van Hensbergen 8022bad8471SEric Van Hensbergen inode->i_nlink = 1; 8032bad8471SEric Van Hensbergen 804531b1094SLatchesar Ionkov inode->i_atime.tv_sec = stat->atime; 805531b1094SLatchesar Ionkov inode->i_mtime.tv_sec = stat->mtime; 806531b1094SLatchesar Ionkov inode->i_ctime.tv_sec = stat->mtime; 8072bad8471SEric Van Hensbergen 808bd32b82dSLatchesar Ionkov inode->i_uid = v9ses->dfltuid; 809bd32b82dSLatchesar Ionkov inode->i_gid = v9ses->dfltgid; 8102bad8471SEric Van Hensbergen 8112405669bSLatchesar Ionkov if (v9fs_extended(v9ses)) { 812531b1094SLatchesar Ionkov inode->i_uid = stat->n_uid; 813531b1094SLatchesar Ionkov inode->i_gid = stat->n_gid; 814531b1094SLatchesar Ionkov } 815531b1094SLatchesar Ionkov 816531b1094SLatchesar Ionkov inode->i_mode = p9mode2unixmode(v9ses, stat->mode); 8172bad8471SEric Van Hensbergen if ((S_ISBLK(inode->i_mode)) || (S_ISCHR(inode->i_mode))) { 8182bad8471SEric Van Hensbergen char type = 0; 8192bad8471SEric Van Hensbergen int major = -1; 8202bad8471SEric Van Hensbergen int minor = -1; 821531b1094SLatchesar Ionkov 8221dac06b2SLatchesar Ionkov n = stat->extension.len; 8231dac06b2SLatchesar Ionkov if (n > sizeof(ext)-1) 8241dac06b2SLatchesar Ionkov n = sizeof(ext)-1; 8251dac06b2SLatchesar Ionkov memmove(ext, stat->extension.str, n); 8261dac06b2SLatchesar Ionkov ext[n] = 0; 827531b1094SLatchesar Ionkov sscanf(ext, "%c %u %u", &type, &major, &minor); 8282bad8471SEric Van Hensbergen switch (type) { 8292bad8471SEric Van Hensbergen case 'c': 8302bad8471SEric Van Hensbergen inode->i_mode &= ~S_IFBLK; 8312bad8471SEric Van Hensbergen inode->i_mode |= S_IFCHR; 8322bad8471SEric Van Hensbergen break; 8332bad8471SEric Van Hensbergen case 'b': 8342bad8471SEric Van Hensbergen break; 8352bad8471SEric Van Hensbergen default: 836bd238fb4SLatchesar Ionkov P9_DPRINTK(P9_DEBUG_ERROR, 837bd238fb4SLatchesar Ionkov "Unknown special type %c (%.*s)\n", type, 838bd238fb4SLatchesar Ionkov stat->extension.len, stat->extension.str); 8392bad8471SEric Van Hensbergen }; 8402bad8471SEric Van Hensbergen inode->i_rdev = MKDEV(major, minor); 8412bad8471SEric Van Hensbergen } else 8422bad8471SEric Van Hensbergen inode->i_rdev = 0; 8432bad8471SEric Van Hensbergen 844531b1094SLatchesar Ionkov inode->i_size = stat->length; 8452bad8471SEric Van Hensbergen 846bd238fb4SLatchesar Ionkov /* not real number of blocks, but 512 byte ones ... */ 847bd238fb4SLatchesar Ionkov inode->i_blocks = (inode->i_size + 512 - 1) >> 9; 8482bad8471SEric Van Hensbergen } 8492bad8471SEric Van Hensbergen 8502bad8471SEric Van Hensbergen /** 8512bad8471SEric Van Hensbergen * v9fs_qid2ino - convert qid into inode number 8522bad8471SEric Van Hensbergen * @qid: qid to hash 8532bad8471SEric Van Hensbergen * 8542bad8471SEric Van Hensbergen * BUG: potential for inode number collisions? 8552bad8471SEric Van Hensbergen */ 8562bad8471SEric Van Hensbergen 857bd238fb4SLatchesar Ionkov ino_t v9fs_qid2ino(struct p9_qid *qid) 8582bad8471SEric Van Hensbergen { 8592bad8471SEric Van Hensbergen u64 path = qid->path + 2; 8602bad8471SEric Van Hensbergen ino_t i = 0; 8612bad8471SEric Van Hensbergen 8622bad8471SEric Van Hensbergen if (sizeof(ino_t) == sizeof(path)) 8632bad8471SEric Van Hensbergen memcpy(&i, &path, sizeof(ino_t)); 8642bad8471SEric Van Hensbergen else 8652bad8471SEric Van Hensbergen i = (ino_t) (path ^ (path >> 32)); 8662bad8471SEric Van Hensbergen 8672bad8471SEric Van Hensbergen return i; 8682bad8471SEric Van Hensbergen } 8692bad8471SEric Van Hensbergen 8702bad8471SEric Van Hensbergen /** 8712bad8471SEric Van Hensbergen * v9fs_readlink - read a symlink's location (internal version) 8722bad8471SEric Van Hensbergen * @dentry: dentry for symlink 87373c592b9SEric Van Hensbergen * @buffer: buffer to load symlink location into 8742bad8471SEric Van Hensbergen * @buflen: length of buffer 8752bad8471SEric Van Hensbergen * 8762bad8471SEric Van Hensbergen */ 8772bad8471SEric Van Hensbergen 8782bad8471SEric Van Hensbergen static int v9fs_readlink(struct dentry *dentry, char *buffer, int buflen) 8792bad8471SEric Van Hensbergen { 880bd238fb4SLatchesar Ionkov int retval; 8812bad8471SEric Van Hensbergen 882bd238fb4SLatchesar Ionkov struct v9fs_session_info *v9ses; 883bd238fb4SLatchesar Ionkov struct p9_fid *fid; 884bd238fb4SLatchesar Ionkov struct p9_stat *st; 8852bad8471SEric Van Hensbergen 886bd238fb4SLatchesar Ionkov P9_DPRINTK(P9_DEBUG_VFS, " %s\n", dentry->d_name.name); 887bd238fb4SLatchesar Ionkov retval = -EPERM; 888bd238fb4SLatchesar Ionkov v9ses = v9fs_inode2v9ses(dentry->d_inode); 889bd238fb4SLatchesar Ionkov fid = v9fs_fid_lookup(dentry); 890da977b2cSEric Van Hensbergen if (IS_ERR(fid)) 891da977b2cSEric Van Hensbergen return PTR_ERR(fid); 8922bad8471SEric Van Hensbergen 8932405669bSLatchesar Ionkov if (!v9fs_extended(v9ses)) 894bd238fb4SLatchesar Ionkov return -EBADF; 8952bad8471SEric Van Hensbergen 896bd238fb4SLatchesar Ionkov st = p9_client_stat(fid); 897bd238fb4SLatchesar Ionkov if (IS_ERR(st)) 898bd238fb4SLatchesar Ionkov return PTR_ERR(st); 8992bad8471SEric Van Hensbergen 900bd238fb4SLatchesar Ionkov if (!(st->mode & P9_DMSYMLINK)) { 9012bad8471SEric Van Hensbergen retval = -EINVAL; 902bd238fb4SLatchesar Ionkov goto done; 9032bad8471SEric Van Hensbergen } 9042bad8471SEric Van Hensbergen 9052bad8471SEric Van Hensbergen /* copy extension buffer into buffer */ 906bd238fb4SLatchesar Ionkov if (st->extension.len < buflen) 907bd238fb4SLatchesar Ionkov buflen = st->extension.len + 1; 9082bad8471SEric Van Hensbergen 909bd238fb4SLatchesar Ionkov memmove(buffer, st->extension.str, buflen - 1); 910531b1094SLatchesar Ionkov buffer[buflen-1] = 0; 9112bad8471SEric Van Hensbergen 912bd238fb4SLatchesar Ionkov P9_DPRINTK(P9_DEBUG_VFS, 913bd238fb4SLatchesar Ionkov "%s -> %.*s (%s)\n", dentry->d_name.name, st->extension.len, 914bd238fb4SLatchesar Ionkov st->extension.str, buffer); 915bd238fb4SLatchesar Ionkov 9162bad8471SEric Van Hensbergen retval = buflen; 9172bad8471SEric Van Hensbergen 918bd238fb4SLatchesar Ionkov done: 919bd238fb4SLatchesar Ionkov kfree(st); 9202bad8471SEric Van Hensbergen return retval; 9212bad8471SEric Van Hensbergen } 9222bad8471SEric Van Hensbergen 9232bad8471SEric Van Hensbergen /** 9242bad8471SEric Van Hensbergen * v9fs_vfs_readlink - read a symlink's location 9252bad8471SEric Van Hensbergen * @dentry: dentry for symlink 9262bad8471SEric Van Hensbergen * @buf: buffer to load symlink location into 9272bad8471SEric Van Hensbergen * @buflen: length of buffer 9282bad8471SEric Van Hensbergen * 9292bad8471SEric Van Hensbergen */ 9302bad8471SEric Van Hensbergen 9312bad8471SEric Van Hensbergen static int v9fs_vfs_readlink(struct dentry *dentry, char __user * buffer, 9322bad8471SEric Van Hensbergen int buflen) 9332bad8471SEric Van Hensbergen { 9342bad8471SEric Van Hensbergen int retval; 9352bad8471SEric Van Hensbergen int ret; 9362bad8471SEric Van Hensbergen char *link = __getname(); 9372bad8471SEric Van Hensbergen 9380710d36aSFlorin Malita if (unlikely(!link)) 9390710d36aSFlorin Malita return -ENOMEM; 9400710d36aSFlorin Malita 941a1f9d8d2SLatchesar Ionkov if (buflen > PATH_MAX) 942a1f9d8d2SLatchesar Ionkov buflen = PATH_MAX; 9432bad8471SEric Van Hensbergen 944bd238fb4SLatchesar Ionkov P9_DPRINTK(P9_DEBUG_VFS, " dentry: %s (%p)\n", dentry->d_iname, dentry); 9452bad8471SEric Van Hensbergen 9462bad8471SEric Van Hensbergen retval = v9fs_readlink(dentry, link, buflen); 9472bad8471SEric Van Hensbergen 9482bad8471SEric Van Hensbergen if (retval > 0) { 9492bad8471SEric Van Hensbergen if ((ret = copy_to_user(buffer, link, retval)) != 0) { 950bd238fb4SLatchesar Ionkov P9_DPRINTK(P9_DEBUG_ERROR, 951bd238fb4SLatchesar Ionkov "problem copying to user: %d\n", ret); 9522bad8471SEric Van Hensbergen retval = ret; 9532bad8471SEric Van Hensbergen } 9542bad8471SEric Van Hensbergen } 9552bad8471SEric Van Hensbergen 956ce44eeb6SDavi Arnaut __putname(link); 9572bad8471SEric Van Hensbergen return retval; 9582bad8471SEric Van Hensbergen } 9592bad8471SEric Van Hensbergen 9602bad8471SEric Van Hensbergen /** 9612bad8471SEric Van Hensbergen * v9fs_vfs_follow_link - follow a symlink path 9622bad8471SEric Van Hensbergen * @dentry: dentry for symlink 9632bad8471SEric Van Hensbergen * @nd: nameidata 9642bad8471SEric Van Hensbergen * 9652bad8471SEric Van Hensbergen */ 9662bad8471SEric Van Hensbergen 9672bad8471SEric Van Hensbergen static void *v9fs_vfs_follow_link(struct dentry *dentry, struct nameidata *nd) 9682bad8471SEric Van Hensbergen { 9692bad8471SEric Van Hensbergen int len = 0; 9702bad8471SEric Van Hensbergen char *link = __getname(); 9712bad8471SEric Van Hensbergen 972bd238fb4SLatchesar Ionkov P9_DPRINTK(P9_DEBUG_VFS, "%s n", dentry->d_name.name); 9732bad8471SEric Van Hensbergen 9742bad8471SEric Van Hensbergen if (!link) 9752bad8471SEric Van Hensbergen link = ERR_PTR(-ENOMEM); 9762bad8471SEric Van Hensbergen else { 97716cce6d2SLatchesar Ionkov len = v9fs_readlink(dentry, link, PATH_MAX); 9782bad8471SEric Van Hensbergen 9792bad8471SEric Van Hensbergen if (len < 0) { 980ce44eeb6SDavi Arnaut __putname(link); 9812bad8471SEric Van Hensbergen link = ERR_PTR(len); 9822bad8471SEric Van Hensbergen } else 9832bad8471SEric Van Hensbergen link[len] = 0; 9842bad8471SEric Van Hensbergen } 9852bad8471SEric Van Hensbergen nd_set_link(nd, link); 9862bad8471SEric Van Hensbergen 9872bad8471SEric Van Hensbergen return NULL; 9882bad8471SEric Van Hensbergen } 9892bad8471SEric Van Hensbergen 9902bad8471SEric Van Hensbergen /** 9912bad8471SEric Van Hensbergen * v9fs_vfs_put_link - release a symlink path 9922bad8471SEric Van Hensbergen * @dentry: dentry for symlink 9932bad8471SEric Van Hensbergen * @nd: nameidata 9942bad8471SEric Van Hensbergen * 9952bad8471SEric Van Hensbergen */ 9962bad8471SEric Van Hensbergen 9972bad8471SEric Van Hensbergen static void v9fs_vfs_put_link(struct dentry *dentry, struct nameidata *nd, void *p) 9982bad8471SEric Van Hensbergen { 9992bad8471SEric Van Hensbergen char *s = nd_get_link(nd); 10002bad8471SEric Van Hensbergen 1001bd238fb4SLatchesar Ionkov P9_DPRINTK(P9_DEBUG_VFS, " %s %s\n", dentry->d_name.name, s); 10022bad8471SEric Van Hensbergen if (!IS_ERR(s)) 1003ce44eeb6SDavi Arnaut __putname(s); 10042bad8471SEric Van Hensbergen } 10052bad8471SEric Van Hensbergen 1006531b1094SLatchesar Ionkov static int v9fs_vfs_mkspecial(struct inode *dir, struct dentry *dentry, 1007531b1094SLatchesar Ionkov int mode, const char *extension) 1008531b1094SLatchesar Ionkov { 1009bd238fb4SLatchesar Ionkov u32 perm; 1010531b1094SLatchesar Ionkov struct v9fs_session_info *v9ses; 1011bd238fb4SLatchesar Ionkov struct p9_fid *fid; 1012531b1094SLatchesar Ionkov 10136a3124a3SLatchesar Ionkov v9ses = v9fs_inode2v9ses(dir); 10142405669bSLatchesar Ionkov if (!v9fs_extended(v9ses)) { 1015bd238fb4SLatchesar Ionkov P9_DPRINTK(P9_DEBUG_ERROR, "not extended\n"); 10166a3124a3SLatchesar Ionkov return -EPERM; 1017531b1094SLatchesar Ionkov } 1018531b1094SLatchesar Ionkov 1019da977b2cSEric Van Hensbergen perm = unixmode2p9mode(v9ses, mode); 1020bd238fb4SLatchesar Ionkov fid = v9fs_create(v9ses, dir, dentry, (char *) extension, perm, 1021bd238fb4SLatchesar Ionkov P9_OREAD); 1022bd238fb4SLatchesar Ionkov if (IS_ERR(fid)) 1023bd238fb4SLatchesar Ionkov return PTR_ERR(fid); 1024da977b2cSEric Van Hensbergen 1025bd238fb4SLatchesar Ionkov p9_client_clunk(fid); 10266a3124a3SLatchesar Ionkov return 0; 1027531b1094SLatchesar Ionkov } 1028531b1094SLatchesar Ionkov 1029531b1094SLatchesar Ionkov /** 1030531b1094SLatchesar Ionkov * v9fs_vfs_symlink - helper function to create symlinks 1031531b1094SLatchesar Ionkov * @dir: directory inode containing symlink 1032531b1094SLatchesar Ionkov * @dentry: dentry for symlink 1033531b1094SLatchesar Ionkov * @symname: symlink data 1034531b1094SLatchesar Ionkov * 1035531b1094SLatchesar Ionkov * See 9P2000.u RFC for more information 1036531b1094SLatchesar Ionkov * 1037531b1094SLatchesar Ionkov */ 1038531b1094SLatchesar Ionkov 1039531b1094SLatchesar Ionkov static int 1040531b1094SLatchesar Ionkov v9fs_vfs_symlink(struct inode *dir, struct dentry *dentry, const char *symname) 1041531b1094SLatchesar Ionkov { 1042bd238fb4SLatchesar Ionkov P9_DPRINTK(P9_DEBUG_VFS, " %lu,%s,%s\n", dir->i_ino, 1043bd238fb4SLatchesar Ionkov dentry->d_name.name, symname); 1044531b1094SLatchesar Ionkov 1045531b1094SLatchesar Ionkov return v9fs_vfs_mkspecial(dir, dentry, S_IFLNK, symname); 1046531b1094SLatchesar Ionkov } 1047531b1094SLatchesar Ionkov 10482bad8471SEric Van Hensbergen /** 10492bad8471SEric Van Hensbergen * v9fs_vfs_link - create a hardlink 10502bad8471SEric Van Hensbergen * @old_dentry: dentry for file to link to 10512bad8471SEric Van Hensbergen * @dir: inode destination for new link 105273c592b9SEric Van Hensbergen * @dentry: dentry for link 10532bad8471SEric Van Hensbergen * 10542bad8471SEric Van Hensbergen */ 10552bad8471SEric Van Hensbergen 10562bad8471SEric Van Hensbergen /* XXX - lots of code dup'd from symlink and creates, 10572bad8471SEric Van Hensbergen * figure out a better reuse strategy 10582bad8471SEric Van Hensbergen */ 10592bad8471SEric Van Hensbergen 10602bad8471SEric Van Hensbergen static int 10612bad8471SEric Van Hensbergen v9fs_vfs_link(struct dentry *old_dentry, struct inode *dir, 10622bad8471SEric Van Hensbergen struct dentry *dentry) 10632bad8471SEric Van Hensbergen { 1064531b1094SLatchesar Ionkov int retval; 1065bd238fb4SLatchesar Ionkov struct p9_fid *oldfid; 1066531b1094SLatchesar Ionkov char *name; 10672bad8471SEric Van Hensbergen 1068bd238fb4SLatchesar Ionkov P9_DPRINTK(P9_DEBUG_VFS, 1069bd238fb4SLatchesar Ionkov " %lu,%s,%s\n", dir->i_ino, dentry->d_name.name, 10702bad8471SEric Van Hensbergen old_dentry->d_name.name); 10712bad8471SEric Van Hensbergen 1072da977b2cSEric Van Hensbergen oldfid = v9fs_fid_clone(old_dentry); 1073da977b2cSEric Van Hensbergen if (IS_ERR(oldfid)) 1074da977b2cSEric Van Hensbergen return PTR_ERR(oldfid); 10752bad8471SEric Van Hensbergen 1076531b1094SLatchesar Ionkov name = __getname(); 1077da977b2cSEric Van Hensbergen if (unlikely(!name)) { 1078da977b2cSEric Van Hensbergen retval = -ENOMEM; 1079da977b2cSEric Van Hensbergen goto clunk_fid; 1080da977b2cSEric Van Hensbergen } 10810710d36aSFlorin Malita 108216cce6d2SLatchesar Ionkov sprintf(name, "%d\n", oldfid->fid); 1083bd238fb4SLatchesar Ionkov retval = v9fs_vfs_mkspecial(dir, dentry, P9_DMLINK, name); 1084531b1094SLatchesar Ionkov __putname(name); 10852bad8471SEric Van Hensbergen 1086da977b2cSEric Van Hensbergen clunk_fid: 1087bd238fb4SLatchesar Ionkov p9_client_clunk(oldfid); 10882bad8471SEric Van Hensbergen return retval; 10892bad8471SEric Van Hensbergen } 10902bad8471SEric Van Hensbergen 10912bad8471SEric Van Hensbergen /** 10922bad8471SEric Van Hensbergen * v9fs_vfs_mknod - create a special file 10932bad8471SEric Van Hensbergen * @dir: inode destination for new link 10942bad8471SEric Van Hensbergen * @dentry: dentry for file 10952bad8471SEric Van Hensbergen * @mode: mode for creation 10962bad8471SEric Van Hensbergen * @dev_t: device associated with special file 10972bad8471SEric Van Hensbergen * 10982bad8471SEric Van Hensbergen */ 10992bad8471SEric Van Hensbergen 11002bad8471SEric Van Hensbergen static int 11012bad8471SEric Van Hensbergen v9fs_vfs_mknod(struct inode *dir, struct dentry *dentry, int mode, dev_t rdev) 11022bad8471SEric Van Hensbergen { 1103531b1094SLatchesar Ionkov int retval; 1104531b1094SLatchesar Ionkov char *name; 11052bad8471SEric Van Hensbergen 1106bd238fb4SLatchesar Ionkov P9_DPRINTK(P9_DEBUG_VFS, 1107bd238fb4SLatchesar Ionkov " %lu,%s mode: %x MAJOR: %u MINOR: %u\n", dir->i_ino, 11082bad8471SEric Van Hensbergen dentry->d_name.name, mode, MAJOR(rdev), MINOR(rdev)); 11092bad8471SEric Van Hensbergen 1110531b1094SLatchesar Ionkov if (!new_valid_dev(rdev)) 1111531b1094SLatchesar Ionkov return -EINVAL; 111273c592b9SEric Van Hensbergen 1113531b1094SLatchesar Ionkov name = __getname(); 1114c0291a05SEugene Teo if (!name) 1115c0291a05SEugene Teo return -ENOMEM; 11162bad8471SEric Van Hensbergen /* build extension */ 11172bad8471SEric Van Hensbergen if (S_ISBLK(mode)) 1118531b1094SLatchesar Ionkov sprintf(name, "b %u %u", MAJOR(rdev), MINOR(rdev)); 11192bad8471SEric Van Hensbergen else if (S_ISCHR(mode)) 1120531b1094SLatchesar Ionkov sprintf(name, "c %u %u", MAJOR(rdev), MINOR(rdev)); 112173c592b9SEric Van Hensbergen else if (S_ISFIFO(mode)) 1122531b1094SLatchesar Ionkov *name = 0; 11232bad8471SEric Van Hensbergen else { 1124531b1094SLatchesar Ionkov __putname(name); 1125531b1094SLatchesar Ionkov return -EINVAL; 11262bad8471SEric Van Hensbergen } 11272bad8471SEric Van Hensbergen 1128531b1094SLatchesar Ionkov retval = v9fs_vfs_mkspecial(dir, dentry, mode, name); 1129531b1094SLatchesar Ionkov __putname(name); 11302bad8471SEric Van Hensbergen 11312bad8471SEric Van Hensbergen return retval; 11322bad8471SEric Van Hensbergen } 11332bad8471SEric Van Hensbergen 1134754661f1SArjan van de Ven static const struct inode_operations v9fs_dir_inode_operations_ext = { 11352bad8471SEric Van Hensbergen .create = v9fs_vfs_create, 11362bad8471SEric Van Hensbergen .lookup = v9fs_vfs_lookup, 11372bad8471SEric Van Hensbergen .symlink = v9fs_vfs_symlink, 11382bad8471SEric Van Hensbergen .link = v9fs_vfs_link, 11392bad8471SEric Van Hensbergen .unlink = v9fs_vfs_unlink, 11402bad8471SEric Van Hensbergen .mkdir = v9fs_vfs_mkdir, 11412bad8471SEric Van Hensbergen .rmdir = v9fs_vfs_rmdir, 11422bad8471SEric Van Hensbergen .mknod = v9fs_vfs_mknod, 11432bad8471SEric Van Hensbergen .rename = v9fs_vfs_rename, 11442bad8471SEric Van Hensbergen .readlink = v9fs_vfs_readlink, 11452bad8471SEric Van Hensbergen .getattr = v9fs_vfs_getattr, 11462bad8471SEric Van Hensbergen .setattr = v9fs_vfs_setattr, 11472bad8471SEric Van Hensbergen }; 11482bad8471SEric Van Hensbergen 1149754661f1SArjan van de Ven static const struct inode_operations v9fs_dir_inode_operations = { 1150b501611aSEric Van Hensbergen .create = v9fs_vfs_create, 1151b501611aSEric Van Hensbergen .lookup = v9fs_vfs_lookup, 1152b501611aSEric Van Hensbergen .unlink = v9fs_vfs_unlink, 1153b501611aSEric Van Hensbergen .mkdir = v9fs_vfs_mkdir, 1154b501611aSEric Van Hensbergen .rmdir = v9fs_vfs_rmdir, 1155b501611aSEric Van Hensbergen .mknod = v9fs_vfs_mknod, 1156b501611aSEric Van Hensbergen .rename = v9fs_vfs_rename, 1157b501611aSEric Van Hensbergen .getattr = v9fs_vfs_getattr, 1158b501611aSEric Van Hensbergen .setattr = v9fs_vfs_setattr, 1159b501611aSEric Van Hensbergen }; 1160b501611aSEric Van Hensbergen 1161754661f1SArjan van de Ven static const struct inode_operations v9fs_file_inode_operations = { 11622bad8471SEric Van Hensbergen .getattr = v9fs_vfs_getattr, 11632bad8471SEric Van Hensbergen .setattr = v9fs_vfs_setattr, 11642bad8471SEric Van Hensbergen }; 11652bad8471SEric Van Hensbergen 1166754661f1SArjan van de Ven static const struct inode_operations v9fs_symlink_inode_operations = { 11672bad8471SEric Van Hensbergen .readlink = v9fs_vfs_readlink, 11682bad8471SEric Van Hensbergen .follow_link = v9fs_vfs_follow_link, 11692bad8471SEric Van Hensbergen .put_link = v9fs_vfs_put_link, 11702bad8471SEric Van Hensbergen .getattr = v9fs_vfs_getattr, 11712bad8471SEric Van Hensbergen .setattr = v9fs_vfs_setattr, 11722bad8471SEric Van Hensbergen }; 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