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; 80d199d652SAnthony Liguori if ((mode & S_ISVTX) == S_ISVTX) 81d199d652SAnthony Liguori res |= P9_DMSETVTX; 82bd238fb4SLatchesar Ionkov if ((mode & P9_DMLINK)) 83bd238fb4SLatchesar Ionkov res |= P9_DMLINK; 842bad8471SEric Van Hensbergen } 852bad8471SEric Van Hensbergen 862bad8471SEric Van Hensbergen return res; 872bad8471SEric Van Hensbergen } 882bad8471SEric Van Hensbergen 892bad8471SEric Van Hensbergen /** 902bad8471SEric Van Hensbergen * p9mode2unixmode- convert plan9 mode bits to unix mode bits 912bad8471SEric Van Hensbergen * @v9ses: v9fs session information 922bad8471SEric Van Hensbergen * @mode: mode to convert 932bad8471SEric Van Hensbergen * 942bad8471SEric Van Hensbergen */ 952bad8471SEric Van Hensbergen 9673c592b9SEric Van Hensbergen static int p9mode2unixmode(struct v9fs_session_info *v9ses, int mode) 972bad8471SEric Van Hensbergen { 982bad8471SEric Van Hensbergen int res; 992bad8471SEric Van Hensbergen 1002bad8471SEric Van Hensbergen res = mode & 0777; 1012bad8471SEric Van Hensbergen 102bd238fb4SLatchesar Ionkov if ((mode & P9_DMDIR) == P9_DMDIR) 1032bad8471SEric Van Hensbergen res |= S_IFDIR; 1042405669bSLatchesar Ionkov else if ((mode & P9_DMSYMLINK) && (v9fs_extended(v9ses))) 1052bad8471SEric Van Hensbergen res |= S_IFLNK; 1062405669bSLatchesar Ionkov else if ((mode & P9_DMSOCKET) && (v9fs_extended(v9ses)) 1072bad8471SEric Van Hensbergen && (v9ses->nodev == 0)) 1082bad8471SEric Van Hensbergen res |= S_IFSOCK; 1092405669bSLatchesar Ionkov else if ((mode & P9_DMNAMEDPIPE) && (v9fs_extended(v9ses)) 1102bad8471SEric Van Hensbergen && (v9ses->nodev == 0)) 1112bad8471SEric Van Hensbergen res |= S_IFIFO; 1122405669bSLatchesar Ionkov else if ((mode & P9_DMDEVICE) && (v9fs_extended(v9ses)) 1132bad8471SEric Van Hensbergen && (v9ses->nodev == 0)) 1142bad8471SEric Van Hensbergen res |= S_IFBLK; 1152bad8471SEric Van Hensbergen else 1162bad8471SEric Van Hensbergen res |= S_IFREG; 1172bad8471SEric Van Hensbergen 1182405669bSLatchesar Ionkov if (v9fs_extended(v9ses)) { 119bd238fb4SLatchesar Ionkov if ((mode & P9_DMSETUID) == P9_DMSETUID) 1202bad8471SEric Van Hensbergen res |= S_ISUID; 1212bad8471SEric Van Hensbergen 122bd238fb4SLatchesar Ionkov if ((mode & P9_DMSETGID) == P9_DMSETGID) 1232bad8471SEric Van Hensbergen res |= S_ISGID; 124d199d652SAnthony Liguori 125d199d652SAnthony Liguori if ((mode & P9_DMSETVTX) == P9_DMSETVTX) 126d199d652SAnthony Liguori res |= S_ISVTX; 1272bad8471SEric Van Hensbergen } 1282bad8471SEric Van Hensbergen 1292bad8471SEric Van Hensbergen return res; 1302bad8471SEric Van Hensbergen } 1312bad8471SEric Van Hensbergen 1326a3124a3SLatchesar Ionkov int v9fs_uflags2omode(int uflags) 1336a3124a3SLatchesar Ionkov { 1346a3124a3SLatchesar Ionkov int ret; 1356a3124a3SLatchesar Ionkov 1366a3124a3SLatchesar Ionkov ret = 0; 1376a3124a3SLatchesar Ionkov switch (uflags&3) { 1386a3124a3SLatchesar Ionkov default: 1396a3124a3SLatchesar Ionkov case O_RDONLY: 140bd238fb4SLatchesar Ionkov ret = P9_OREAD; 1416a3124a3SLatchesar Ionkov break; 1426a3124a3SLatchesar Ionkov 1436a3124a3SLatchesar Ionkov case O_WRONLY: 144bd238fb4SLatchesar Ionkov ret = P9_OWRITE; 1456a3124a3SLatchesar Ionkov break; 1466a3124a3SLatchesar Ionkov 1476a3124a3SLatchesar Ionkov case O_RDWR: 148bd238fb4SLatchesar Ionkov ret = P9_ORDWR; 1496a3124a3SLatchesar Ionkov break; 1506a3124a3SLatchesar Ionkov } 1516a3124a3SLatchesar Ionkov 1526a3124a3SLatchesar Ionkov if (uflags & O_EXCL) 153bd238fb4SLatchesar Ionkov ret |= P9_OEXCL; 1546a3124a3SLatchesar Ionkov 1556a3124a3SLatchesar Ionkov if (uflags & O_TRUNC) 156bd238fb4SLatchesar Ionkov ret |= P9_OTRUNC; 1576a3124a3SLatchesar Ionkov 1586a3124a3SLatchesar Ionkov if (uflags & O_APPEND) 159bd238fb4SLatchesar Ionkov ret |= P9_OAPPEND; 1606a3124a3SLatchesar Ionkov 1616a3124a3SLatchesar Ionkov return ret; 1626a3124a3SLatchesar Ionkov } 1636a3124a3SLatchesar Ionkov 1642bad8471SEric Van Hensbergen /** 165531b1094SLatchesar Ionkov * v9fs_blank_wstat - helper function to setup a 9P stat structure 1662bad8471SEric Van Hensbergen * @v9ses: 9P session info (for determining extended mode) 167531b1094SLatchesar Ionkov * @wstat: structure to initialize 1682bad8471SEric Van Hensbergen * 1692bad8471SEric Van Hensbergen */ 1702bad8471SEric Van Hensbergen 17173c592b9SEric Van Hensbergen static void 172bd238fb4SLatchesar Ionkov v9fs_blank_wstat(struct p9_wstat *wstat) 1732bad8471SEric Van Hensbergen { 174531b1094SLatchesar Ionkov wstat->type = ~0; 175531b1094SLatchesar Ionkov wstat->dev = ~0; 176531b1094SLatchesar Ionkov wstat->qid.type = ~0; 177531b1094SLatchesar Ionkov wstat->qid.version = ~0; 178531b1094SLatchesar Ionkov *((long long *)&wstat->qid.path) = ~0; 179531b1094SLatchesar Ionkov wstat->mode = ~0; 180531b1094SLatchesar Ionkov wstat->atime = ~0; 181531b1094SLatchesar Ionkov wstat->mtime = ~0; 182531b1094SLatchesar Ionkov wstat->length = ~0; 183531b1094SLatchesar Ionkov wstat->name = NULL; 184531b1094SLatchesar Ionkov wstat->uid = NULL; 185531b1094SLatchesar Ionkov wstat->gid = NULL; 186531b1094SLatchesar Ionkov wstat->muid = NULL; 187531b1094SLatchesar Ionkov wstat->n_uid = ~0; 188531b1094SLatchesar Ionkov wstat->n_gid = ~0; 189531b1094SLatchesar Ionkov wstat->n_muid = ~0; 190531b1094SLatchesar Ionkov wstat->extension = NULL; 1912bad8471SEric Van Hensbergen } 1922bad8471SEric Van Hensbergen 1932bad8471SEric Van Hensbergen /** 1942bad8471SEric Van Hensbergen * v9fs_get_inode - helper function to setup an inode 1952bad8471SEric Van Hensbergen * @sb: superblock 1962bad8471SEric Van Hensbergen * @mode: mode to setup inode with 1972bad8471SEric Van Hensbergen * 1982bad8471SEric Van Hensbergen */ 1992bad8471SEric Van Hensbergen 2002bad8471SEric Van Hensbergen struct inode *v9fs_get_inode(struct super_block *sb, int mode) 2012bad8471SEric Van Hensbergen { 2026a3124a3SLatchesar Ionkov struct inode *inode; 203b501611aSEric Van Hensbergen struct v9fs_session_info *v9ses = sb->s_fs_info; 2042bad8471SEric Van Hensbergen 205bd238fb4SLatchesar Ionkov P9_DPRINTK(P9_DEBUG_VFS, "super block: %p mode: %o\n", sb, mode); 2062bad8471SEric Van Hensbergen 2072bad8471SEric Van Hensbergen inode = new_inode(sb); 2082bad8471SEric Van Hensbergen if (inode) { 2092bad8471SEric Van Hensbergen inode->i_mode = mode; 2102bad8471SEric Van Hensbergen inode->i_uid = current->fsuid; 2112bad8471SEric Van Hensbergen inode->i_gid = current->fsgid; 2122bad8471SEric Van Hensbergen inode->i_blocks = 0; 2132bad8471SEric Van Hensbergen inode->i_rdev = 0; 2142bad8471SEric Van Hensbergen inode->i_atime = inode->i_mtime = inode->i_ctime = CURRENT_TIME; 215147b31cfSEric Van Hensbergen inode->i_mapping->a_ops = &v9fs_addr_operations; 2162bad8471SEric Van Hensbergen 2172bad8471SEric Van Hensbergen switch (mode & S_IFMT) { 2182bad8471SEric Van Hensbergen case S_IFIFO: 2192bad8471SEric Van Hensbergen case S_IFBLK: 2202bad8471SEric Van Hensbergen case S_IFCHR: 2212bad8471SEric Van Hensbergen case S_IFSOCK: 2222405669bSLatchesar Ionkov if (!v9fs_extended(v9ses)) { 223bd238fb4SLatchesar Ionkov P9_DPRINTK(P9_DEBUG_ERROR, 224bd238fb4SLatchesar Ionkov "special files without extended mode\n"); 225b501611aSEric Van Hensbergen return ERR_PTR(-EINVAL); 226b501611aSEric Van Hensbergen } 2275d58bec5SEric Van Hensbergen init_special_inode(inode, inode->i_mode, 2285d58bec5SEric Van Hensbergen inode->i_rdev); 2295d58bec5SEric Van Hensbergen break; 2302bad8471SEric Van Hensbergen case S_IFREG: 2312bad8471SEric Van Hensbergen inode->i_op = &v9fs_file_inode_operations; 2322bad8471SEric Van Hensbergen inode->i_fop = &v9fs_file_operations; 2332bad8471SEric Van Hensbergen break; 234b501611aSEric Van Hensbergen case S_IFLNK: 2352405669bSLatchesar Ionkov if (!v9fs_extended(v9ses)) { 236bd238fb4SLatchesar Ionkov P9_DPRINTK(P9_DEBUG_ERROR, 237bd238fb4SLatchesar Ionkov "extended modes used w/o 9P2000.u\n"); 238b501611aSEric Van Hensbergen return ERR_PTR(-EINVAL); 239b501611aSEric Van Hensbergen } 240b501611aSEric Van Hensbergen inode->i_op = &v9fs_symlink_inode_operations; 241b501611aSEric Van Hensbergen break; 2422bad8471SEric Van Hensbergen case S_IFDIR: 243d8c76e6fSDave Hansen inc_nlink(inode); 2442405669bSLatchesar Ionkov if (v9fs_extended(v9ses)) 245b501611aSEric Van Hensbergen inode->i_op = &v9fs_dir_inode_operations_ext; 246b501611aSEric Van Hensbergen else 2472bad8471SEric Van Hensbergen inode->i_op = &v9fs_dir_inode_operations; 2482bad8471SEric Van Hensbergen inode->i_fop = &v9fs_dir_operations; 2492bad8471SEric Van Hensbergen break; 2502bad8471SEric Van Hensbergen default: 251bd238fb4SLatchesar Ionkov P9_DPRINTK(P9_DEBUG_ERROR, 252bd238fb4SLatchesar Ionkov "BAD mode 0x%x S_IFMT 0x%x\n", 2532bad8471SEric Van Hensbergen mode, mode & S_IFMT); 2542bad8471SEric Van Hensbergen return ERR_PTR(-EINVAL); 2552bad8471SEric Van Hensbergen } 2562bad8471SEric Van Hensbergen } else { 257bd238fb4SLatchesar Ionkov P9_EPRINTK(KERN_WARNING, "Problem allocating inode\n"); 2582bad8471SEric Van Hensbergen return ERR_PTR(-ENOMEM); 2592bad8471SEric Van Hensbergen } 2602bad8471SEric Van Hensbergen return inode; 2612bad8471SEric Van Hensbergen } 2622bad8471SEric Van Hensbergen 263bd238fb4SLatchesar Ionkov /* 2646a3124a3SLatchesar Ionkov static struct v9fs_fid* 2656a3124a3SLatchesar Ionkov v9fs_clone_walk(struct v9fs_session_info *v9ses, u32 fid, struct dentry *dentry) 2666a3124a3SLatchesar Ionkov { 2676a3124a3SLatchesar Ionkov int err; 268736c4b85SMika Kukkonen int nfid; 2696a3124a3SLatchesar Ionkov struct v9fs_fid *ret; 2706a3124a3SLatchesar Ionkov struct v9fs_fcall *fcall; 2710b8dd177SLatchesar Ionkov 2726a3124a3SLatchesar Ionkov nfid = v9fs_get_idpool(&v9ses->fidpool); 2736a3124a3SLatchesar Ionkov if (nfid < 0) { 2740b8dd177SLatchesar Ionkov eprintk(KERN_WARNING, "no free fids available\n"); 275731805b4SLatchesar Ionkov return ERR_PTR(-ENOSPC); 2760b8dd177SLatchesar Ionkov } 2770b8dd177SLatchesar Ionkov 2786a3124a3SLatchesar Ionkov err = v9fs_t_walk(v9ses, fid, nfid, (char *) dentry->d_name.name, 2796a3124a3SLatchesar Ionkov &fcall); 2806a3124a3SLatchesar Ionkov 2816a3124a3SLatchesar Ionkov if (err < 0) { 28241e5a6acSLatchesar Ionkov if (fcall && fcall->id == RWALK) 28341e5a6acSLatchesar Ionkov goto clunk_fid; 28441e5a6acSLatchesar Ionkov 2856a3124a3SLatchesar Ionkov PRINT_FCALL_ERROR("walk error", fcall); 2866a3124a3SLatchesar Ionkov v9fs_put_idpool(nfid, &v9ses->fidpool); 2876a3124a3SLatchesar Ionkov goto error; 2880b8dd177SLatchesar Ionkov } 2896a3124a3SLatchesar Ionkov 2903cf6429aSLatchesar Ionkov kfree(fcall); 2913cf6429aSLatchesar Ionkov fcall = NULL; 2926a3124a3SLatchesar Ionkov ret = v9fs_fid_create(v9ses, nfid); 2936a3124a3SLatchesar Ionkov if (!ret) { 2946a3124a3SLatchesar Ionkov err = -ENOMEM; 2956a3124a3SLatchesar Ionkov goto clunk_fid; 2960b8dd177SLatchesar Ionkov } 2972bad8471SEric Van Hensbergen 2986a3124a3SLatchesar Ionkov err = v9fs_fid_insert(ret, dentry); 2996a3124a3SLatchesar Ionkov if (err < 0) { 3006a3124a3SLatchesar Ionkov v9fs_fid_destroy(ret); 3016a3124a3SLatchesar Ionkov goto clunk_fid; 3026a3124a3SLatchesar Ionkov } 3032bad8471SEric Van Hensbergen 3046a3124a3SLatchesar Ionkov return ret; 3056a3124a3SLatchesar Ionkov 3066a3124a3SLatchesar Ionkov clunk_fid: 3076a3124a3SLatchesar Ionkov v9fs_t_clunk(v9ses, nfid); 3086a3124a3SLatchesar Ionkov 3096a3124a3SLatchesar Ionkov error: 3106a3124a3SLatchesar Ionkov kfree(fcall); 3116a3124a3SLatchesar Ionkov return ERR_PTR(err); 3126a3124a3SLatchesar Ionkov } 313bd238fb4SLatchesar Ionkov */ 3146a3124a3SLatchesar Ionkov 3155174fdabSLatchesar Ionkov static struct inode * 316bd238fb4SLatchesar Ionkov v9fs_inode_from_fid(struct v9fs_session_info *v9ses, struct p9_fid *fid, 3176a3124a3SLatchesar Ionkov struct super_block *sb) 3186a3124a3SLatchesar Ionkov { 3196a3124a3SLatchesar Ionkov int err, umode; 3206a3124a3SLatchesar Ionkov struct inode *ret; 321bd238fb4SLatchesar Ionkov struct p9_stat *st; 3226a3124a3SLatchesar Ionkov 3236a3124a3SLatchesar Ionkov ret = NULL; 324bd238fb4SLatchesar Ionkov st = p9_client_stat(fid); 325bd238fb4SLatchesar Ionkov if (IS_ERR(st)) { 326bd238fb4SLatchesar Ionkov err = PTR_ERR(st); 327bd238fb4SLatchesar Ionkov st = NULL; 3286a3124a3SLatchesar Ionkov goto error; 3292bad8471SEric Van Hensbergen } 3302bad8471SEric Van Hensbergen 331bd238fb4SLatchesar Ionkov umode = p9mode2unixmode(v9ses, st->mode); 3326a3124a3SLatchesar Ionkov ret = v9fs_get_inode(sb, umode); 3336a3124a3SLatchesar Ionkov if (IS_ERR(ret)) { 3346a3124a3SLatchesar Ionkov err = PTR_ERR(ret); 3356a3124a3SLatchesar Ionkov ret = NULL; 3366a3124a3SLatchesar Ionkov goto error; 3372bad8471SEric Van Hensbergen } 3382bad8471SEric Van Hensbergen 339bd238fb4SLatchesar Ionkov v9fs_stat2inode(st, ret, sb); 340bd238fb4SLatchesar Ionkov ret->i_ino = v9fs_qid2ino(&st->qid); 341bd238fb4SLatchesar Ionkov kfree(st); 3426a3124a3SLatchesar Ionkov return ret; 3432bad8471SEric Van Hensbergen 3446a3124a3SLatchesar Ionkov error: 345bd238fb4SLatchesar Ionkov kfree(st); 3466a3124a3SLatchesar Ionkov if (ret) 3476a3124a3SLatchesar Ionkov iput(ret); 3482bad8471SEric Van Hensbergen 3496a3124a3SLatchesar Ionkov return ERR_PTR(err); 3502bad8471SEric Van Hensbergen } 3512bad8471SEric Van Hensbergen 3522bad8471SEric Van Hensbergen /** 3532bad8471SEric Van Hensbergen * v9fs_remove - helper function to remove files and directories 35473c592b9SEric Van Hensbergen * @dir: directory inode that is being deleted 35573c592b9SEric Van Hensbergen * @file: dentry that is being deleted 35673c592b9SEric Van Hensbergen * @rmdir: removing a directory 3572bad8471SEric Van Hensbergen * 3582bad8471SEric Van Hensbergen */ 3592bad8471SEric Van Hensbergen 3602bad8471SEric Van Hensbergen static int v9fs_remove(struct inode *dir, struct dentry *file, int rmdir) 3612bad8471SEric Van Hensbergen { 362bd238fb4SLatchesar Ionkov struct inode *file_inode; 363bd238fb4SLatchesar Ionkov struct v9fs_session_info *v9ses; 364bd238fb4SLatchesar Ionkov struct p9_fid *v9fid; 3652bad8471SEric Van Hensbergen 366bd238fb4SLatchesar Ionkov P9_DPRINTK(P9_DEBUG_VFS, "inode: %p dentry: %p rmdir: %d\n", dir, file, 3672bad8471SEric Van Hensbergen rmdir); 3682bad8471SEric Van Hensbergen 3692bad8471SEric Van Hensbergen file_inode = file->d_inode; 3702bad8471SEric Van Hensbergen v9ses = v9fs_inode2v9ses(file_inode); 371c959df9fSLatchesar Ionkov v9fid = v9fs_fid_clone(file); 372da977b2cSEric Van Hensbergen if (IS_ERR(v9fid)) 373da977b2cSEric Van Hensbergen return PTR_ERR(v9fid); 3742bad8471SEric Van Hensbergen 375bd238fb4SLatchesar Ionkov return p9_client_remove(v9fid); 3762bad8471SEric Van Hensbergen } 3772bad8471SEric Van Hensbergen 3786a3124a3SLatchesar Ionkov static int 3796a3124a3SLatchesar Ionkov v9fs_open_created(struct inode *inode, struct file *file) 3806a3124a3SLatchesar Ionkov { 3816a3124a3SLatchesar Ionkov return 0; 3826a3124a3SLatchesar Ionkov } 3836a3124a3SLatchesar Ionkov 384bd238fb4SLatchesar Ionkov 385bd238fb4SLatchesar Ionkov /** 386bd238fb4SLatchesar Ionkov * v9fs_create - Create a file 387bd238fb4SLatchesar Ionkov * @dentry: dentry that is being created 388bd238fb4SLatchesar Ionkov * @perm: create permissions 389bd238fb4SLatchesar Ionkov * @mode: open mode 390bd238fb4SLatchesar Ionkov * 391bd238fb4SLatchesar Ionkov */ 392bd238fb4SLatchesar Ionkov static struct p9_fid * 393bd238fb4SLatchesar Ionkov v9fs_create(struct v9fs_session_info *v9ses, struct inode *dir, 394bd238fb4SLatchesar Ionkov struct dentry *dentry, char *extension, u32 perm, u8 mode) 395bd238fb4SLatchesar Ionkov { 396bd238fb4SLatchesar Ionkov int err; 397bd238fb4SLatchesar Ionkov char *name; 398bd238fb4SLatchesar Ionkov struct p9_fid *dfid, *ofid, *fid; 399bd238fb4SLatchesar Ionkov struct inode *inode; 400bd238fb4SLatchesar Ionkov 401bd238fb4SLatchesar Ionkov err = 0; 402bd238fb4SLatchesar Ionkov ofid = NULL; 403bd238fb4SLatchesar Ionkov fid = NULL; 404bd238fb4SLatchesar Ionkov name = (char *) dentry->d_name.name; 405bd238fb4SLatchesar Ionkov dfid = v9fs_fid_clone(dentry->d_parent); 406bd238fb4SLatchesar Ionkov if (IS_ERR(dfid)) { 407bd238fb4SLatchesar Ionkov err = PTR_ERR(dfid); 408bd238fb4SLatchesar Ionkov dfid = NULL; 409bd238fb4SLatchesar Ionkov goto error; 410bd238fb4SLatchesar Ionkov } 411bd238fb4SLatchesar Ionkov 412bd238fb4SLatchesar Ionkov /* clone a fid to use for creation */ 413bd238fb4SLatchesar Ionkov ofid = p9_client_walk(dfid, 0, NULL, 1); 414bd238fb4SLatchesar Ionkov if (IS_ERR(ofid)) { 415bd238fb4SLatchesar Ionkov err = PTR_ERR(ofid); 416bd238fb4SLatchesar Ionkov ofid = NULL; 417bd238fb4SLatchesar Ionkov goto error; 418bd238fb4SLatchesar Ionkov } 419bd238fb4SLatchesar Ionkov 420bd238fb4SLatchesar Ionkov err = p9_client_fcreate(ofid, name, perm, mode, extension); 421bd238fb4SLatchesar Ionkov if (err < 0) 422bd238fb4SLatchesar Ionkov goto error; 423bd238fb4SLatchesar Ionkov 424bd238fb4SLatchesar Ionkov /* now walk from the parent so we can get unopened fid */ 425bd238fb4SLatchesar Ionkov fid = p9_client_walk(dfid, 1, &name, 0); 426bd238fb4SLatchesar Ionkov if (IS_ERR(fid)) { 427bd238fb4SLatchesar Ionkov err = PTR_ERR(fid); 428bd238fb4SLatchesar Ionkov fid = NULL; 429bd238fb4SLatchesar Ionkov goto error; 430bd238fb4SLatchesar Ionkov } else 431bd238fb4SLatchesar Ionkov dfid = NULL; 432bd238fb4SLatchesar Ionkov 433bd238fb4SLatchesar Ionkov /* instantiate inode and assign the unopened fid to the dentry */ 434bd238fb4SLatchesar Ionkov inode = v9fs_inode_from_fid(v9ses, fid, dir->i_sb); 435bd238fb4SLatchesar Ionkov if (IS_ERR(inode)) { 436bd238fb4SLatchesar Ionkov err = PTR_ERR(inode); 437bd238fb4SLatchesar Ionkov goto error; 438bd238fb4SLatchesar Ionkov } 439bd238fb4SLatchesar Ionkov 440bd238fb4SLatchesar Ionkov if (v9ses->cache) 441bd238fb4SLatchesar Ionkov dentry->d_op = &v9fs_cached_dentry_operations; 442bd238fb4SLatchesar Ionkov else 443bd238fb4SLatchesar Ionkov dentry->d_op = &v9fs_dentry_operations; 444bd238fb4SLatchesar Ionkov 445bd238fb4SLatchesar Ionkov d_instantiate(dentry, inode); 446bd238fb4SLatchesar Ionkov v9fs_fid_add(dentry, fid); 447bd238fb4SLatchesar Ionkov return ofid; 448bd238fb4SLatchesar Ionkov 449bd238fb4SLatchesar Ionkov error: 450bd238fb4SLatchesar Ionkov if (dfid) 451bd238fb4SLatchesar Ionkov p9_client_clunk(dfid); 452bd238fb4SLatchesar Ionkov 453bd238fb4SLatchesar Ionkov if (ofid) 454bd238fb4SLatchesar Ionkov p9_client_clunk(ofid); 455bd238fb4SLatchesar Ionkov 456bd238fb4SLatchesar Ionkov if (fid) 457bd238fb4SLatchesar Ionkov p9_client_clunk(fid); 458bd238fb4SLatchesar Ionkov 459bd238fb4SLatchesar Ionkov return ERR_PTR(err); 460bd238fb4SLatchesar Ionkov } 461bd238fb4SLatchesar Ionkov 4622bad8471SEric Van Hensbergen /** 4632bad8471SEric Van Hensbergen * v9fs_vfs_create - VFS hook to create files 464bd238fb4SLatchesar Ionkov * @inode: directory inode that is being created 4652bad8471SEric Van Hensbergen * @dentry: dentry that is being deleted 4666a3124a3SLatchesar Ionkov * @mode: create permissions 4672bad8471SEric Van Hensbergen * @nd: path information 4682bad8471SEric Van Hensbergen * 4692bad8471SEric Van Hensbergen */ 4702bad8471SEric Van Hensbergen 4712bad8471SEric Van Hensbergen static int 4726a3124a3SLatchesar Ionkov v9fs_vfs_create(struct inode *dir, struct dentry *dentry, int mode, 4732bad8471SEric Van Hensbergen struct nameidata *nd) 4742bad8471SEric Van Hensbergen { 4756a3124a3SLatchesar Ionkov int err; 476bd238fb4SLatchesar Ionkov u32 perm; 4776a3124a3SLatchesar Ionkov int flags; 4786a3124a3SLatchesar Ionkov struct v9fs_session_info *v9ses; 479bd238fb4SLatchesar Ionkov struct p9_fid *fid; 4806a3124a3SLatchesar Ionkov struct file *filp; 4816a3124a3SLatchesar Ionkov 482bd238fb4SLatchesar Ionkov err = 0; 483bd238fb4SLatchesar Ionkov fid = NULL; 4846a3124a3SLatchesar Ionkov v9ses = v9fs_inode2v9ses(dir); 485da977b2cSEric Van Hensbergen perm = unixmode2p9mode(v9ses, mode); 4866a3124a3SLatchesar Ionkov if (nd && nd->flags & LOOKUP_OPEN) 4876a3124a3SLatchesar Ionkov flags = nd->intent.open.flags - 1; 4886a3124a3SLatchesar Ionkov else 4896a3124a3SLatchesar Ionkov flags = O_RDWR; 4906a3124a3SLatchesar Ionkov 491bd238fb4SLatchesar Ionkov fid = v9fs_create(v9ses, dir, dentry, NULL, perm, 492bd238fb4SLatchesar Ionkov v9fs_uflags2omode(flags)); 493bd238fb4SLatchesar Ionkov if (IS_ERR(fid)) { 494bd238fb4SLatchesar Ionkov err = PTR_ERR(fid); 495bd238fb4SLatchesar Ionkov fid = NULL; 4966a3124a3SLatchesar Ionkov goto error; 4976a3124a3SLatchesar Ionkov } 4986a3124a3SLatchesar Ionkov 499bd238fb4SLatchesar Ionkov /* if we are opening a file, assign the open fid to the file */ 5006a3124a3SLatchesar Ionkov if (nd && nd->flags & LOOKUP_OPEN) { 5016a3124a3SLatchesar Ionkov filp = lookup_instantiate_filp(nd, dentry, v9fs_open_created); 5026a3124a3SLatchesar Ionkov if (IS_ERR(filp)) { 503bd238fb4SLatchesar Ionkov err = PTR_ERR(filp); 504bd238fb4SLatchesar Ionkov goto error; 5056a3124a3SLatchesar Ionkov } 5066a3124a3SLatchesar Ionkov 507bd238fb4SLatchesar Ionkov filp->private_data = fid; 508bd238fb4SLatchesar Ionkov } else 509bd238fb4SLatchesar Ionkov p9_client_clunk(fid); 5106a3124a3SLatchesar Ionkov 5116a3124a3SLatchesar Ionkov return 0; 5126a3124a3SLatchesar Ionkov 5136a3124a3SLatchesar Ionkov error: 514bd238fb4SLatchesar Ionkov if (fid) 515bd238fb4SLatchesar Ionkov p9_client_clunk(fid); 5166a3124a3SLatchesar Ionkov 5176a3124a3SLatchesar Ionkov return err; 5182bad8471SEric Van Hensbergen } 5192bad8471SEric Van Hensbergen 5202bad8471SEric Van Hensbergen /** 5212bad8471SEric Van Hensbergen * v9fs_vfs_mkdir - VFS mkdir hook to create a directory 52273c592b9SEric Van Hensbergen * @inode: inode that is being unlinked 5232bad8471SEric Van Hensbergen * @dentry: dentry that is being unlinked 5242bad8471SEric Van Hensbergen * @mode: mode for new directory 5252bad8471SEric Van Hensbergen * 5262bad8471SEric Van Hensbergen */ 5272bad8471SEric Van Hensbergen 5286a3124a3SLatchesar Ionkov static int v9fs_vfs_mkdir(struct inode *dir, struct dentry *dentry, int mode) 5292bad8471SEric Van Hensbergen { 5306a3124a3SLatchesar Ionkov int err; 531bd238fb4SLatchesar Ionkov u32 perm; 5326a3124a3SLatchesar Ionkov struct v9fs_session_info *v9ses; 533bd238fb4SLatchesar Ionkov struct p9_fid *fid; 5346a3124a3SLatchesar Ionkov 535bd238fb4SLatchesar Ionkov P9_DPRINTK(P9_DEBUG_VFS, "name %s\n", dentry->d_name.name); 536bd238fb4SLatchesar Ionkov err = 0; 5376a3124a3SLatchesar Ionkov v9ses = v9fs_inode2v9ses(dir); 5386a3124a3SLatchesar Ionkov perm = unixmode2p9mode(v9ses, mode | S_IFDIR); 539bd238fb4SLatchesar Ionkov fid = v9fs_create(v9ses, dir, dentry, NULL, perm, P9_OREAD); 540bd238fb4SLatchesar Ionkov if (IS_ERR(fid)) { 541bd238fb4SLatchesar Ionkov err = PTR_ERR(fid); 542bd238fb4SLatchesar Ionkov fid = NULL; 5436a3124a3SLatchesar Ionkov } 5446a3124a3SLatchesar Ionkov 545bd238fb4SLatchesar Ionkov if (fid) 546bd238fb4SLatchesar Ionkov p9_client_clunk(fid); 5476a3124a3SLatchesar Ionkov 5486a3124a3SLatchesar Ionkov return err; 5492bad8471SEric Van Hensbergen } 5502bad8471SEric Van Hensbergen 5512bad8471SEric Van Hensbergen /** 5522bad8471SEric Van Hensbergen * v9fs_vfs_lookup - VFS lookup hook to "walk" to a new inode 5532bad8471SEric Van Hensbergen * @dir: inode that is being walked from 5542bad8471SEric Van Hensbergen * @dentry: dentry that is being walked to? 5552bad8471SEric Van Hensbergen * @nameidata: path data 5562bad8471SEric Van Hensbergen * 5572bad8471SEric Van Hensbergen */ 5582bad8471SEric Van Hensbergen 5592bad8471SEric Van Hensbergen static struct dentry *v9fs_vfs_lookup(struct inode *dir, struct dentry *dentry, 5602bad8471SEric Van Hensbergen struct nameidata *nameidata) 5612bad8471SEric Van Hensbergen { 5622bad8471SEric Van Hensbergen struct super_block *sb; 5632bad8471SEric Van Hensbergen struct v9fs_session_info *v9ses; 564bd238fb4SLatchesar Ionkov struct p9_fid *dfid, *fid; 5652bad8471SEric Van Hensbergen struct inode *inode; 566bd238fb4SLatchesar Ionkov char *name; 5672bad8471SEric Van Hensbergen int result = 0; 5682bad8471SEric Van Hensbergen 569bd238fb4SLatchesar Ionkov P9_DPRINTK(P9_DEBUG_VFS, "dir: %p dentry: (%s) %p nameidata: %p\n", 570731805b4SLatchesar Ionkov dir, dentry->d_name.name, dentry, nameidata); 5712bad8471SEric Van Hensbergen 5722bad8471SEric Van Hensbergen sb = dir->i_sb; 5732bad8471SEric Van Hensbergen v9ses = v9fs_inode2v9ses(dir); 574bd238fb4SLatchesar Ionkov dfid = v9fs_fid_lookup(dentry->d_parent); 575bd238fb4SLatchesar Ionkov if (IS_ERR(dfid)) 576bd238fb4SLatchesar Ionkov return ERR_PTR(PTR_ERR(dfid)); 5772bad8471SEric Van Hensbergen 578bd238fb4SLatchesar Ionkov name = (char *) dentry->d_name.name; 579bd238fb4SLatchesar Ionkov fid = p9_client_walk(dfid, 1, &name, 1); 580bd238fb4SLatchesar Ionkov if (IS_ERR(fid)) { 581bd238fb4SLatchesar Ionkov result = PTR_ERR(fid); 5822bad8471SEric Van Hensbergen if (result == -ENOENT) { 5832bad8471SEric Van Hensbergen d_add(dentry, NULL); 5842bad8471SEric Van Hensbergen return NULL; 5852bad8471SEric Van Hensbergen } 5862bad8471SEric Van Hensbergen 587bd238fb4SLatchesar Ionkov return ERR_PTR(result); 5882bad8471SEric Van Hensbergen } 5892bad8471SEric Van Hensbergen 590bd238fb4SLatchesar Ionkov inode = v9fs_inode_from_fid(v9ses, fid, dir->i_sb); 591bd238fb4SLatchesar Ionkov if (IS_ERR(inode)) { 592bd238fb4SLatchesar Ionkov result = PTR_ERR(inode); 593bd238fb4SLatchesar Ionkov inode = NULL; 594bd238fb4SLatchesar Ionkov goto error; 5952bad8471SEric Van Hensbergen } 5962bad8471SEric Van Hensbergen 597bd238fb4SLatchesar Ionkov result = v9fs_fid_add(dentry, fid); 5986a3124a3SLatchesar Ionkov if (result < 0) 599bd238fb4SLatchesar Ionkov goto error; 6006a3124a3SLatchesar Ionkov 601e03abc0cSEric Van Hensbergen if ((fid->qid.version) && (v9ses->cache)) 602e03abc0cSEric Van Hensbergen dentry->d_op = &v9fs_cached_dentry_operations; 603e03abc0cSEric Van Hensbergen else 604e03abc0cSEric Van Hensbergen dentry->d_op = &v9fs_dentry_operations; 6052bad8471SEric Van Hensbergen 6062bad8471SEric Van Hensbergen d_add(dentry, inode); 6072bad8471SEric Van Hensbergen return NULL; 6082bad8471SEric Van Hensbergen 609bd238fb4SLatchesar Ionkov error: 610bd238fb4SLatchesar Ionkov if (fid) 611bd238fb4SLatchesar Ionkov p9_client_clunk(fid); 612da977b2cSEric Van Hensbergen 6132bad8471SEric Van Hensbergen return ERR_PTR(result); 6142bad8471SEric Van Hensbergen } 6152bad8471SEric Van Hensbergen 6162bad8471SEric Van Hensbergen /** 6172bad8471SEric Van Hensbergen * v9fs_vfs_unlink - VFS unlink hook to delete an inode 6182bad8471SEric Van Hensbergen * @i: inode that is being unlinked 61973c592b9SEric Van Hensbergen * @d: dentry that is being unlinked 6202bad8471SEric Van Hensbergen * 6212bad8471SEric Van Hensbergen */ 6222bad8471SEric Van Hensbergen 6232bad8471SEric Van Hensbergen static int v9fs_vfs_unlink(struct inode *i, struct dentry *d) 6242bad8471SEric Van Hensbergen { 6252bad8471SEric Van Hensbergen return v9fs_remove(i, d, 0); 6262bad8471SEric Van Hensbergen } 6272bad8471SEric Van Hensbergen 6282bad8471SEric Van Hensbergen /** 6292bad8471SEric Van Hensbergen * v9fs_vfs_rmdir - VFS unlink hook to delete a directory 6302bad8471SEric Van Hensbergen * @i: inode that is being unlinked 63173c592b9SEric Van Hensbergen * @d: dentry that is being unlinked 6322bad8471SEric Van Hensbergen * 6332bad8471SEric Van Hensbergen */ 6342bad8471SEric Van Hensbergen 6352bad8471SEric Van Hensbergen static int v9fs_vfs_rmdir(struct inode *i, struct dentry *d) 6362bad8471SEric Van Hensbergen { 6372bad8471SEric Van Hensbergen return v9fs_remove(i, d, 1); 6382bad8471SEric Van Hensbergen } 6392bad8471SEric Van Hensbergen 6402bad8471SEric Van Hensbergen /** 6412bad8471SEric Van Hensbergen * v9fs_vfs_rename - VFS hook to rename an inode 6422bad8471SEric Van Hensbergen * @old_dir: old dir inode 6432bad8471SEric Van Hensbergen * @old_dentry: old dentry 6442bad8471SEric Van Hensbergen * @new_dir: new dir inode 6452bad8471SEric Van Hensbergen * @new_dentry: new dentry 6462bad8471SEric Van Hensbergen * 6472bad8471SEric Van Hensbergen */ 6482bad8471SEric Van Hensbergen 6492bad8471SEric Van Hensbergen static int 6502bad8471SEric Van Hensbergen v9fs_vfs_rename(struct inode *old_dir, struct dentry *old_dentry, 6512bad8471SEric Van Hensbergen struct inode *new_dir, struct dentry *new_dentry) 6522bad8471SEric Van Hensbergen { 653bd238fb4SLatchesar Ionkov struct inode *old_inode; 654bd238fb4SLatchesar Ionkov struct v9fs_session_info *v9ses; 655bd238fb4SLatchesar Ionkov struct p9_fid *oldfid; 656bd238fb4SLatchesar Ionkov struct p9_fid *olddirfid; 657bd238fb4SLatchesar Ionkov struct p9_fid *newdirfid; 658bd238fb4SLatchesar Ionkov struct p9_wstat wstat; 659bd238fb4SLatchesar Ionkov int retval; 6602bad8471SEric Van Hensbergen 661bd238fb4SLatchesar Ionkov P9_DPRINTK(P9_DEBUG_VFS, "\n"); 662bd238fb4SLatchesar Ionkov retval = 0; 663bd238fb4SLatchesar Ionkov old_inode = old_dentry->d_inode; 664bd238fb4SLatchesar Ionkov v9ses = v9fs_inode2v9ses(old_inode); 665bd238fb4SLatchesar Ionkov oldfid = v9fs_fid_lookup(old_dentry); 666da977b2cSEric Van Hensbergen if (IS_ERR(oldfid)) 667da977b2cSEric Van Hensbergen return PTR_ERR(oldfid); 668da977b2cSEric Van Hensbergen 669da977b2cSEric Van Hensbergen olddirfid = v9fs_fid_clone(old_dentry->d_parent); 670da977b2cSEric Van Hensbergen if (IS_ERR(olddirfid)) { 671da977b2cSEric Van Hensbergen retval = PTR_ERR(olddirfid); 672bd238fb4SLatchesar Ionkov goto done; 673da977b2cSEric Van Hensbergen } 674da977b2cSEric Van Hensbergen 675da977b2cSEric Van Hensbergen newdirfid = v9fs_fid_clone(new_dentry->d_parent); 676da977b2cSEric Van Hensbergen if (IS_ERR(newdirfid)) { 677da977b2cSEric Van Hensbergen retval = PTR_ERR(newdirfid); 678bd238fb4SLatchesar Ionkov goto clunk_olddir; 6792bad8471SEric Van Hensbergen } 6802bad8471SEric Van Hensbergen 6812bad8471SEric Van Hensbergen /* 9P can only handle file rename in the same directory */ 6822bad8471SEric Van Hensbergen if (memcmp(&olddirfid->qid, &newdirfid->qid, sizeof(newdirfid->qid))) { 683bd238fb4SLatchesar Ionkov P9_DPRINTK(P9_DEBUG_ERROR, 684bd238fb4SLatchesar Ionkov "old dir and new dir are different\n"); 685621997cdSEric Van Hensbergen retval = -EXDEV; 686bd238fb4SLatchesar Ionkov goto clunk_newdir; 6872bad8471SEric Van Hensbergen } 6882bad8471SEric Van Hensbergen 689531b1094SLatchesar Ionkov v9fs_blank_wstat(&wstat); 690ba17674fSLatchesar Ionkov wstat.muid = v9ses->uname; 691531b1094SLatchesar Ionkov wstat.name = (char *) new_dentry->d_name.name; 692bd238fb4SLatchesar Ionkov retval = p9_client_wstat(oldfid, &wstat); 6932bad8471SEric Van Hensbergen 694bd238fb4SLatchesar Ionkov clunk_newdir: 69522150c4fSLatchesar Ionkov p9_client_clunk(newdirfid); 6962bad8471SEric Van Hensbergen 697bd238fb4SLatchesar Ionkov clunk_olddir: 69822150c4fSLatchesar Ionkov p9_client_clunk(olddirfid); 6992bad8471SEric Van Hensbergen 700bd238fb4SLatchesar Ionkov done: 7012bad8471SEric Van Hensbergen return retval; 7022bad8471SEric Van Hensbergen } 7032bad8471SEric Van Hensbergen 7042bad8471SEric Van Hensbergen /** 705943ffb58SAdrian Bunk * v9fs_vfs_getattr - retrieve file metadata 7062bad8471SEric Van Hensbergen * @mnt - mount information 7072bad8471SEric Van Hensbergen * @dentry - file to get attributes on 7082bad8471SEric Van Hensbergen * @stat - metadata structure to populate 7092bad8471SEric Van Hensbergen * 7102bad8471SEric Van Hensbergen */ 7112bad8471SEric Van Hensbergen 7122bad8471SEric Van Hensbergen static int 7132bad8471SEric Van Hensbergen v9fs_vfs_getattr(struct vfsmount *mnt, struct dentry *dentry, 7142bad8471SEric Van Hensbergen struct kstat *stat) 7152bad8471SEric Van Hensbergen { 716bd238fb4SLatchesar Ionkov int err; 717bd238fb4SLatchesar Ionkov struct v9fs_session_info *v9ses; 718bd238fb4SLatchesar Ionkov struct p9_fid *fid; 719bd238fb4SLatchesar Ionkov struct p9_stat *st; 7202bad8471SEric Van Hensbergen 721bd238fb4SLatchesar Ionkov P9_DPRINTK(P9_DEBUG_VFS, "dentry: %p\n", dentry); 722bd238fb4SLatchesar Ionkov err = -EPERM; 723bd238fb4SLatchesar Ionkov v9ses = v9fs_inode2v9ses(dentry->d_inode); 7249523a841SEric Van Hensbergen if (v9ses->cache == CACHE_LOOSE) 7259523a841SEric Van Hensbergen return simple_getattr(mnt, dentry, stat); 7269523a841SEric Van Hensbergen 727bd238fb4SLatchesar Ionkov fid = v9fs_fid_lookup(dentry); 728da977b2cSEric Van Hensbergen if (IS_ERR(fid)) 729da977b2cSEric Van Hensbergen return PTR_ERR(fid); 7302bad8471SEric Van Hensbergen 731bd238fb4SLatchesar Ionkov st = p9_client_stat(fid); 732bd238fb4SLatchesar Ionkov if (IS_ERR(st)) 733bd238fb4SLatchesar Ionkov return PTR_ERR(st); 7342bad8471SEric Van Hensbergen 735bd238fb4SLatchesar Ionkov v9fs_stat2inode(st, dentry->d_inode, dentry->d_inode->i_sb); 7362bad8471SEric Van Hensbergen generic_fillattr(dentry->d_inode, stat); 7372bad8471SEric Van Hensbergen 738bd238fb4SLatchesar Ionkov kfree(st); 739bd238fb4SLatchesar Ionkov return 0; 7402bad8471SEric Van Hensbergen } 7412bad8471SEric Van Hensbergen 7422bad8471SEric Van Hensbergen /** 7432bad8471SEric Van Hensbergen * v9fs_vfs_setattr - set file metadata 7442bad8471SEric Van Hensbergen * @dentry: file whose metadata to set 7452bad8471SEric Van Hensbergen * @iattr: metadata assignment structure 7462bad8471SEric Van Hensbergen * 7472bad8471SEric Van Hensbergen */ 7482bad8471SEric Van Hensbergen 7492bad8471SEric Van Hensbergen static int v9fs_vfs_setattr(struct dentry *dentry, struct iattr *iattr) 7502bad8471SEric Van Hensbergen { 751bd238fb4SLatchesar Ionkov int retval; 752bd238fb4SLatchesar Ionkov struct v9fs_session_info *v9ses; 753bd238fb4SLatchesar Ionkov struct p9_fid *fid; 754bd238fb4SLatchesar Ionkov struct p9_wstat wstat; 7552bad8471SEric Van Hensbergen 756bd238fb4SLatchesar Ionkov P9_DPRINTK(P9_DEBUG_VFS, "\n"); 757bd238fb4SLatchesar Ionkov retval = -EPERM; 758bd238fb4SLatchesar Ionkov v9ses = v9fs_inode2v9ses(dentry->d_inode); 759bd238fb4SLatchesar Ionkov fid = v9fs_fid_lookup(dentry); 760da977b2cSEric Van Hensbergen if(IS_ERR(fid)) 761da977b2cSEric Van Hensbergen return PTR_ERR(fid); 7622bad8471SEric Van Hensbergen 763531b1094SLatchesar Ionkov v9fs_blank_wstat(&wstat); 7642bad8471SEric Van Hensbergen if (iattr->ia_valid & ATTR_MODE) 765531b1094SLatchesar Ionkov wstat.mode = unixmode2p9mode(v9ses, iattr->ia_mode); 7662bad8471SEric Van Hensbergen 7672bad8471SEric Van Hensbergen if (iattr->ia_valid & ATTR_MTIME) 768531b1094SLatchesar Ionkov wstat.mtime = iattr->ia_mtime.tv_sec; 7692bad8471SEric Van Hensbergen 7702bad8471SEric Van Hensbergen if (iattr->ia_valid & ATTR_ATIME) 771531b1094SLatchesar Ionkov wstat.atime = iattr->ia_atime.tv_sec; 7722bad8471SEric Van Hensbergen 7732bad8471SEric Van Hensbergen if (iattr->ia_valid & ATTR_SIZE) 774531b1094SLatchesar Ionkov wstat.length = iattr->ia_size; 7752bad8471SEric Van Hensbergen 7762405669bSLatchesar Ionkov if (v9fs_extended(v9ses)) { 777531b1094SLatchesar Ionkov if (iattr->ia_valid & ATTR_UID) 778531b1094SLatchesar Ionkov wstat.n_uid = iattr->ia_uid; 7792bad8471SEric Van Hensbergen 780531b1094SLatchesar Ionkov if (iattr->ia_valid & ATTR_GID) 781531b1094SLatchesar Ionkov wstat.n_gid = iattr->ia_gid; 7822bad8471SEric Van Hensbergen } 7832bad8471SEric Van Hensbergen 784bd238fb4SLatchesar Ionkov retval = p9_client_wstat(fid, &wstat); 785bd238fb4SLatchesar Ionkov if (retval >= 0) 786bd238fb4SLatchesar Ionkov retval = inode_setattr(dentry->d_inode, iattr); 7872bad8471SEric Van Hensbergen 788bd238fb4SLatchesar Ionkov return retval; 7892bad8471SEric Van Hensbergen } 7902bad8471SEric Van Hensbergen 7912bad8471SEric Van Hensbergen /** 792531b1094SLatchesar Ionkov * v9fs_stat2inode - populate an inode structure with mistat info 793531b1094SLatchesar Ionkov * @stat: Plan 9 metadata (mistat) structure 7942bad8471SEric Van Hensbergen * @inode: inode to populate 7952bad8471SEric Van Hensbergen * @sb: superblock of filesystem 7962bad8471SEric Van Hensbergen * 7972bad8471SEric Van Hensbergen */ 7982bad8471SEric Van Hensbergen 7992bad8471SEric Van Hensbergen void 800bd238fb4SLatchesar Ionkov v9fs_stat2inode(struct p9_stat *stat, struct inode *inode, 8012bad8471SEric Van Hensbergen struct super_block *sb) 8022bad8471SEric Van Hensbergen { 8031dac06b2SLatchesar Ionkov int n; 804531b1094SLatchesar Ionkov char ext[32]; 8052bad8471SEric Van Hensbergen struct v9fs_session_info *v9ses = sb->s_fs_info; 8062bad8471SEric Van Hensbergen 8072bad8471SEric Van Hensbergen inode->i_nlink = 1; 8082bad8471SEric Van Hensbergen 809531b1094SLatchesar Ionkov inode->i_atime.tv_sec = stat->atime; 810531b1094SLatchesar Ionkov inode->i_mtime.tv_sec = stat->mtime; 811531b1094SLatchesar Ionkov inode->i_ctime.tv_sec = stat->mtime; 8122bad8471SEric Van Hensbergen 813bd32b82dSLatchesar Ionkov inode->i_uid = v9ses->dfltuid; 814bd32b82dSLatchesar Ionkov inode->i_gid = v9ses->dfltgid; 8152bad8471SEric Van Hensbergen 8162405669bSLatchesar Ionkov if (v9fs_extended(v9ses)) { 817531b1094SLatchesar Ionkov inode->i_uid = stat->n_uid; 818531b1094SLatchesar Ionkov inode->i_gid = stat->n_gid; 819531b1094SLatchesar Ionkov } 820531b1094SLatchesar Ionkov 821531b1094SLatchesar Ionkov inode->i_mode = p9mode2unixmode(v9ses, stat->mode); 8222bad8471SEric Van Hensbergen if ((S_ISBLK(inode->i_mode)) || (S_ISCHR(inode->i_mode))) { 8232bad8471SEric Van Hensbergen char type = 0; 8242bad8471SEric Van Hensbergen int major = -1; 8252bad8471SEric Van Hensbergen int minor = -1; 826531b1094SLatchesar Ionkov 8271dac06b2SLatchesar Ionkov n = stat->extension.len; 8281dac06b2SLatchesar Ionkov if (n > sizeof(ext)-1) 8291dac06b2SLatchesar Ionkov n = sizeof(ext)-1; 8301dac06b2SLatchesar Ionkov memmove(ext, stat->extension.str, n); 8311dac06b2SLatchesar Ionkov ext[n] = 0; 832531b1094SLatchesar Ionkov sscanf(ext, "%c %u %u", &type, &major, &minor); 8332bad8471SEric Van Hensbergen switch (type) { 8342bad8471SEric Van Hensbergen case 'c': 8352bad8471SEric Van Hensbergen inode->i_mode &= ~S_IFBLK; 8362bad8471SEric Van Hensbergen inode->i_mode |= S_IFCHR; 8372bad8471SEric Van Hensbergen break; 8382bad8471SEric Van Hensbergen case 'b': 8392bad8471SEric Van Hensbergen break; 8402bad8471SEric Van Hensbergen default: 841bd238fb4SLatchesar Ionkov P9_DPRINTK(P9_DEBUG_ERROR, 842bd238fb4SLatchesar Ionkov "Unknown special type %c (%.*s)\n", type, 843bd238fb4SLatchesar Ionkov stat->extension.len, stat->extension.str); 8442bad8471SEric Van Hensbergen }; 8452bad8471SEric Van Hensbergen inode->i_rdev = MKDEV(major, minor); 8462bad8471SEric Van Hensbergen } else 8472bad8471SEric Van Hensbergen inode->i_rdev = 0; 8482bad8471SEric Van Hensbergen 849531b1094SLatchesar Ionkov inode->i_size = stat->length; 8502bad8471SEric Van Hensbergen 851bd238fb4SLatchesar Ionkov /* not real number of blocks, but 512 byte ones ... */ 852bd238fb4SLatchesar Ionkov inode->i_blocks = (inode->i_size + 512 - 1) >> 9; 8532bad8471SEric Van Hensbergen } 8542bad8471SEric Van Hensbergen 8552bad8471SEric Van Hensbergen /** 8562bad8471SEric Van Hensbergen * v9fs_qid2ino - convert qid into inode number 8572bad8471SEric Van Hensbergen * @qid: qid to hash 8582bad8471SEric Van Hensbergen * 8592bad8471SEric Van Hensbergen * BUG: potential for inode number collisions? 8602bad8471SEric Van Hensbergen */ 8612bad8471SEric Van Hensbergen 862bd238fb4SLatchesar Ionkov ino_t v9fs_qid2ino(struct p9_qid *qid) 8632bad8471SEric Van Hensbergen { 8642bad8471SEric Van Hensbergen u64 path = qid->path + 2; 8652bad8471SEric Van Hensbergen ino_t i = 0; 8662bad8471SEric Van Hensbergen 8672bad8471SEric Van Hensbergen if (sizeof(ino_t) == sizeof(path)) 8682bad8471SEric Van Hensbergen memcpy(&i, &path, sizeof(ino_t)); 8692bad8471SEric Van Hensbergen else 8702bad8471SEric Van Hensbergen i = (ino_t) (path ^ (path >> 32)); 8712bad8471SEric Van Hensbergen 8722bad8471SEric Van Hensbergen return i; 8732bad8471SEric Van Hensbergen } 8742bad8471SEric Van Hensbergen 8752bad8471SEric Van Hensbergen /** 8762bad8471SEric Van Hensbergen * v9fs_readlink - read a symlink's location (internal version) 8772bad8471SEric Van Hensbergen * @dentry: dentry for symlink 87873c592b9SEric Van Hensbergen * @buffer: buffer to load symlink location into 8792bad8471SEric Van Hensbergen * @buflen: length of buffer 8802bad8471SEric Van Hensbergen * 8812bad8471SEric Van Hensbergen */ 8822bad8471SEric Van Hensbergen 8832bad8471SEric Van Hensbergen static int v9fs_readlink(struct dentry *dentry, char *buffer, int buflen) 8842bad8471SEric Van Hensbergen { 885bd238fb4SLatchesar Ionkov int retval; 8862bad8471SEric Van Hensbergen 887bd238fb4SLatchesar Ionkov struct v9fs_session_info *v9ses; 888bd238fb4SLatchesar Ionkov struct p9_fid *fid; 889bd238fb4SLatchesar Ionkov struct p9_stat *st; 8902bad8471SEric Van Hensbergen 891bd238fb4SLatchesar Ionkov P9_DPRINTK(P9_DEBUG_VFS, " %s\n", dentry->d_name.name); 892bd238fb4SLatchesar Ionkov retval = -EPERM; 893bd238fb4SLatchesar Ionkov v9ses = v9fs_inode2v9ses(dentry->d_inode); 894bd238fb4SLatchesar Ionkov fid = v9fs_fid_lookup(dentry); 895da977b2cSEric Van Hensbergen if (IS_ERR(fid)) 896da977b2cSEric Van Hensbergen return PTR_ERR(fid); 8972bad8471SEric Van Hensbergen 8982405669bSLatchesar Ionkov if (!v9fs_extended(v9ses)) 899bd238fb4SLatchesar Ionkov return -EBADF; 9002bad8471SEric Van Hensbergen 901bd238fb4SLatchesar Ionkov st = p9_client_stat(fid); 902bd238fb4SLatchesar Ionkov if (IS_ERR(st)) 903bd238fb4SLatchesar Ionkov return PTR_ERR(st); 9042bad8471SEric Van Hensbergen 905bd238fb4SLatchesar Ionkov if (!(st->mode & P9_DMSYMLINK)) { 9062bad8471SEric Van Hensbergen retval = -EINVAL; 907bd238fb4SLatchesar Ionkov goto done; 9082bad8471SEric Van Hensbergen } 9092bad8471SEric Van Hensbergen 9102bad8471SEric Van Hensbergen /* copy extension buffer into buffer */ 911bd238fb4SLatchesar Ionkov if (st->extension.len < buflen) 912bd238fb4SLatchesar Ionkov buflen = st->extension.len + 1; 9132bad8471SEric Van Hensbergen 914bd238fb4SLatchesar Ionkov memmove(buffer, st->extension.str, buflen - 1); 915531b1094SLatchesar Ionkov buffer[buflen-1] = 0; 9162bad8471SEric Van Hensbergen 917bd238fb4SLatchesar Ionkov P9_DPRINTK(P9_DEBUG_VFS, 918bd238fb4SLatchesar Ionkov "%s -> %.*s (%s)\n", dentry->d_name.name, st->extension.len, 919bd238fb4SLatchesar Ionkov st->extension.str, buffer); 920bd238fb4SLatchesar Ionkov 9212bad8471SEric Van Hensbergen retval = buflen; 9222bad8471SEric Van Hensbergen 923bd238fb4SLatchesar Ionkov done: 924bd238fb4SLatchesar Ionkov kfree(st); 9252bad8471SEric Van Hensbergen return retval; 9262bad8471SEric Van Hensbergen } 9272bad8471SEric Van Hensbergen 9282bad8471SEric Van Hensbergen /** 9292bad8471SEric Van Hensbergen * v9fs_vfs_readlink - read a symlink's location 9302bad8471SEric Van Hensbergen * @dentry: dentry for symlink 9312bad8471SEric Van Hensbergen * @buf: buffer to load symlink location into 9322bad8471SEric Van Hensbergen * @buflen: length of buffer 9332bad8471SEric Van Hensbergen * 9342bad8471SEric Van Hensbergen */ 9352bad8471SEric Van Hensbergen 9362bad8471SEric Van Hensbergen static int v9fs_vfs_readlink(struct dentry *dentry, char __user * buffer, 9372bad8471SEric Van Hensbergen int buflen) 9382bad8471SEric Van Hensbergen { 9392bad8471SEric Van Hensbergen int retval; 9402bad8471SEric Van Hensbergen int ret; 9412bad8471SEric Van Hensbergen char *link = __getname(); 9422bad8471SEric Van Hensbergen 9430710d36aSFlorin Malita if (unlikely(!link)) 9440710d36aSFlorin Malita return -ENOMEM; 9450710d36aSFlorin Malita 946a1f9d8d2SLatchesar Ionkov if (buflen > PATH_MAX) 947a1f9d8d2SLatchesar Ionkov buflen = PATH_MAX; 9482bad8471SEric Van Hensbergen 949bd238fb4SLatchesar Ionkov P9_DPRINTK(P9_DEBUG_VFS, " dentry: %s (%p)\n", dentry->d_iname, dentry); 9502bad8471SEric Van Hensbergen 9512bad8471SEric Van Hensbergen retval = v9fs_readlink(dentry, link, buflen); 9522bad8471SEric Van Hensbergen 9532bad8471SEric Van Hensbergen if (retval > 0) { 9542bad8471SEric Van Hensbergen if ((ret = copy_to_user(buffer, link, retval)) != 0) { 955bd238fb4SLatchesar Ionkov P9_DPRINTK(P9_DEBUG_ERROR, 956bd238fb4SLatchesar Ionkov "problem copying to user: %d\n", ret); 9572bad8471SEric Van Hensbergen retval = ret; 9582bad8471SEric Van Hensbergen } 9592bad8471SEric Van Hensbergen } 9602bad8471SEric Van Hensbergen 961ce44eeb6SDavi Arnaut __putname(link); 9622bad8471SEric Van Hensbergen return retval; 9632bad8471SEric Van Hensbergen } 9642bad8471SEric Van Hensbergen 9652bad8471SEric Van Hensbergen /** 9662bad8471SEric Van Hensbergen * v9fs_vfs_follow_link - follow a symlink path 9672bad8471SEric Van Hensbergen * @dentry: dentry for symlink 9682bad8471SEric Van Hensbergen * @nd: nameidata 9692bad8471SEric Van Hensbergen * 9702bad8471SEric Van Hensbergen */ 9712bad8471SEric Van Hensbergen 9722bad8471SEric Van Hensbergen static void *v9fs_vfs_follow_link(struct dentry *dentry, struct nameidata *nd) 9732bad8471SEric Van Hensbergen { 9742bad8471SEric Van Hensbergen int len = 0; 9752bad8471SEric Van Hensbergen char *link = __getname(); 9762bad8471SEric Van Hensbergen 977bd238fb4SLatchesar Ionkov P9_DPRINTK(P9_DEBUG_VFS, "%s n", dentry->d_name.name); 9782bad8471SEric Van Hensbergen 9792bad8471SEric Van Hensbergen if (!link) 9802bad8471SEric Van Hensbergen link = ERR_PTR(-ENOMEM); 9812bad8471SEric Van Hensbergen else { 98216cce6d2SLatchesar Ionkov len = v9fs_readlink(dentry, link, PATH_MAX); 9832bad8471SEric Van Hensbergen 9842bad8471SEric Van Hensbergen if (len < 0) { 985ce44eeb6SDavi Arnaut __putname(link); 9862bad8471SEric Van Hensbergen link = ERR_PTR(len); 9872bad8471SEric Van Hensbergen } else 9882bad8471SEric Van Hensbergen link[len] = 0; 9892bad8471SEric Van Hensbergen } 9902bad8471SEric Van Hensbergen nd_set_link(nd, link); 9912bad8471SEric Van Hensbergen 9922bad8471SEric Van Hensbergen return NULL; 9932bad8471SEric Van Hensbergen } 9942bad8471SEric Van Hensbergen 9952bad8471SEric Van Hensbergen /** 9962bad8471SEric Van Hensbergen * v9fs_vfs_put_link - release a symlink path 9972bad8471SEric Van Hensbergen * @dentry: dentry for symlink 9982bad8471SEric Van Hensbergen * @nd: nameidata 9992bad8471SEric Van Hensbergen * 10002bad8471SEric Van Hensbergen */ 10012bad8471SEric Van Hensbergen 10022bad8471SEric Van Hensbergen static void v9fs_vfs_put_link(struct dentry *dentry, struct nameidata *nd, void *p) 10032bad8471SEric Van Hensbergen { 10042bad8471SEric Van Hensbergen char *s = nd_get_link(nd); 10052bad8471SEric Van Hensbergen 1006bd238fb4SLatchesar Ionkov P9_DPRINTK(P9_DEBUG_VFS, " %s %s\n", dentry->d_name.name, s); 10072bad8471SEric Van Hensbergen if (!IS_ERR(s)) 1008ce44eeb6SDavi Arnaut __putname(s); 10092bad8471SEric Van Hensbergen } 10102bad8471SEric Van Hensbergen 1011531b1094SLatchesar Ionkov static int v9fs_vfs_mkspecial(struct inode *dir, struct dentry *dentry, 1012531b1094SLatchesar Ionkov int mode, const char *extension) 1013531b1094SLatchesar Ionkov { 1014bd238fb4SLatchesar Ionkov u32 perm; 1015531b1094SLatchesar Ionkov struct v9fs_session_info *v9ses; 1016bd238fb4SLatchesar Ionkov struct p9_fid *fid; 1017531b1094SLatchesar Ionkov 10186a3124a3SLatchesar Ionkov v9ses = v9fs_inode2v9ses(dir); 10192405669bSLatchesar Ionkov if (!v9fs_extended(v9ses)) { 1020bd238fb4SLatchesar Ionkov P9_DPRINTK(P9_DEBUG_ERROR, "not extended\n"); 10216a3124a3SLatchesar Ionkov return -EPERM; 1022531b1094SLatchesar Ionkov } 1023531b1094SLatchesar Ionkov 1024da977b2cSEric Van Hensbergen perm = unixmode2p9mode(v9ses, mode); 1025bd238fb4SLatchesar Ionkov fid = v9fs_create(v9ses, dir, dentry, (char *) extension, perm, 1026bd238fb4SLatchesar Ionkov P9_OREAD); 1027bd238fb4SLatchesar Ionkov if (IS_ERR(fid)) 1028bd238fb4SLatchesar Ionkov return PTR_ERR(fid); 1029da977b2cSEric Van Hensbergen 1030bd238fb4SLatchesar Ionkov p9_client_clunk(fid); 10316a3124a3SLatchesar Ionkov return 0; 1032531b1094SLatchesar Ionkov } 1033531b1094SLatchesar Ionkov 1034531b1094SLatchesar Ionkov /** 1035531b1094SLatchesar Ionkov * v9fs_vfs_symlink - helper function to create symlinks 1036531b1094SLatchesar Ionkov * @dir: directory inode containing symlink 1037531b1094SLatchesar Ionkov * @dentry: dentry for symlink 1038531b1094SLatchesar Ionkov * @symname: symlink data 1039531b1094SLatchesar Ionkov * 1040531b1094SLatchesar Ionkov * See 9P2000.u RFC for more information 1041531b1094SLatchesar Ionkov * 1042531b1094SLatchesar Ionkov */ 1043531b1094SLatchesar Ionkov 1044531b1094SLatchesar Ionkov static int 1045531b1094SLatchesar Ionkov v9fs_vfs_symlink(struct inode *dir, struct dentry *dentry, const char *symname) 1046531b1094SLatchesar Ionkov { 1047bd238fb4SLatchesar Ionkov P9_DPRINTK(P9_DEBUG_VFS, " %lu,%s,%s\n", dir->i_ino, 1048bd238fb4SLatchesar Ionkov dentry->d_name.name, symname); 1049531b1094SLatchesar Ionkov 1050531b1094SLatchesar Ionkov return v9fs_vfs_mkspecial(dir, dentry, S_IFLNK, symname); 1051531b1094SLatchesar Ionkov } 1052531b1094SLatchesar Ionkov 10532bad8471SEric Van Hensbergen /** 10542bad8471SEric Van Hensbergen * v9fs_vfs_link - create a hardlink 10552bad8471SEric Van Hensbergen * @old_dentry: dentry for file to link to 10562bad8471SEric Van Hensbergen * @dir: inode destination for new link 105773c592b9SEric Van Hensbergen * @dentry: dentry for link 10582bad8471SEric Van Hensbergen * 10592bad8471SEric Van Hensbergen */ 10602bad8471SEric Van Hensbergen 10612bad8471SEric Van Hensbergen /* XXX - lots of code dup'd from symlink and creates, 10622bad8471SEric Van Hensbergen * figure out a better reuse strategy 10632bad8471SEric Van Hensbergen */ 10642bad8471SEric Van Hensbergen 10652bad8471SEric Van Hensbergen static int 10662bad8471SEric Van Hensbergen v9fs_vfs_link(struct dentry *old_dentry, struct inode *dir, 10672bad8471SEric Van Hensbergen struct dentry *dentry) 10682bad8471SEric Van Hensbergen { 1069531b1094SLatchesar Ionkov int retval; 1070bd238fb4SLatchesar Ionkov struct p9_fid *oldfid; 1071531b1094SLatchesar Ionkov char *name; 10722bad8471SEric Van Hensbergen 1073bd238fb4SLatchesar Ionkov P9_DPRINTK(P9_DEBUG_VFS, 1074bd238fb4SLatchesar Ionkov " %lu,%s,%s\n", dir->i_ino, dentry->d_name.name, 10752bad8471SEric Van Hensbergen old_dentry->d_name.name); 10762bad8471SEric Van Hensbergen 1077da977b2cSEric Van Hensbergen oldfid = v9fs_fid_clone(old_dentry); 1078da977b2cSEric Van Hensbergen if (IS_ERR(oldfid)) 1079da977b2cSEric Van Hensbergen return PTR_ERR(oldfid); 10802bad8471SEric Van Hensbergen 1081531b1094SLatchesar Ionkov name = __getname(); 1082da977b2cSEric Van Hensbergen if (unlikely(!name)) { 1083da977b2cSEric Van Hensbergen retval = -ENOMEM; 1084da977b2cSEric Van Hensbergen goto clunk_fid; 1085da977b2cSEric Van Hensbergen } 10860710d36aSFlorin Malita 108716cce6d2SLatchesar Ionkov sprintf(name, "%d\n", oldfid->fid); 1088bd238fb4SLatchesar Ionkov retval = v9fs_vfs_mkspecial(dir, dentry, P9_DMLINK, name); 1089531b1094SLatchesar Ionkov __putname(name); 10902bad8471SEric Van Hensbergen 1091da977b2cSEric Van Hensbergen clunk_fid: 1092bd238fb4SLatchesar Ionkov p9_client_clunk(oldfid); 10932bad8471SEric Van Hensbergen return retval; 10942bad8471SEric Van Hensbergen } 10952bad8471SEric Van Hensbergen 10962bad8471SEric Van Hensbergen /** 10972bad8471SEric Van Hensbergen * v9fs_vfs_mknod - create a special file 10982bad8471SEric Van Hensbergen * @dir: inode destination for new link 10992bad8471SEric Van Hensbergen * @dentry: dentry for file 11002bad8471SEric Van Hensbergen * @mode: mode for creation 11012bad8471SEric Van Hensbergen * @dev_t: device associated with special file 11022bad8471SEric Van Hensbergen * 11032bad8471SEric Van Hensbergen */ 11042bad8471SEric Van Hensbergen 11052bad8471SEric Van Hensbergen static int 11062bad8471SEric Van Hensbergen v9fs_vfs_mknod(struct inode *dir, struct dentry *dentry, int mode, dev_t rdev) 11072bad8471SEric Van Hensbergen { 1108531b1094SLatchesar Ionkov int retval; 1109531b1094SLatchesar Ionkov char *name; 11102bad8471SEric Van Hensbergen 1111bd238fb4SLatchesar Ionkov P9_DPRINTK(P9_DEBUG_VFS, 1112bd238fb4SLatchesar Ionkov " %lu,%s mode: %x MAJOR: %u MINOR: %u\n", dir->i_ino, 11132bad8471SEric Van Hensbergen dentry->d_name.name, mode, MAJOR(rdev), MINOR(rdev)); 11142bad8471SEric Van Hensbergen 1115531b1094SLatchesar Ionkov if (!new_valid_dev(rdev)) 1116531b1094SLatchesar Ionkov return -EINVAL; 111773c592b9SEric Van Hensbergen 1118531b1094SLatchesar Ionkov name = __getname(); 1119c0291a05SEugene Teo if (!name) 1120c0291a05SEugene Teo return -ENOMEM; 11212bad8471SEric Van Hensbergen /* build extension */ 11222bad8471SEric Van Hensbergen if (S_ISBLK(mode)) 1123531b1094SLatchesar Ionkov sprintf(name, "b %u %u", MAJOR(rdev), MINOR(rdev)); 11242bad8471SEric Van Hensbergen else if (S_ISCHR(mode)) 1125531b1094SLatchesar Ionkov sprintf(name, "c %u %u", MAJOR(rdev), MINOR(rdev)); 112673c592b9SEric Van Hensbergen else if (S_ISFIFO(mode)) 1127531b1094SLatchesar Ionkov *name = 0; 11282bad8471SEric Van Hensbergen else { 1129531b1094SLatchesar Ionkov __putname(name); 1130531b1094SLatchesar Ionkov return -EINVAL; 11312bad8471SEric Van Hensbergen } 11322bad8471SEric Van Hensbergen 1133531b1094SLatchesar Ionkov retval = v9fs_vfs_mkspecial(dir, dentry, mode, name); 1134531b1094SLatchesar Ionkov __putname(name); 11352bad8471SEric Van Hensbergen 11362bad8471SEric Van Hensbergen return retval; 11372bad8471SEric Van Hensbergen } 11382bad8471SEric Van Hensbergen 1139754661f1SArjan van de Ven static const struct inode_operations v9fs_dir_inode_operations_ext = { 11402bad8471SEric Van Hensbergen .create = v9fs_vfs_create, 11412bad8471SEric Van Hensbergen .lookup = v9fs_vfs_lookup, 11422bad8471SEric Van Hensbergen .symlink = v9fs_vfs_symlink, 11432bad8471SEric Van Hensbergen .link = v9fs_vfs_link, 11442bad8471SEric Van Hensbergen .unlink = v9fs_vfs_unlink, 11452bad8471SEric Van Hensbergen .mkdir = v9fs_vfs_mkdir, 11462bad8471SEric Van Hensbergen .rmdir = v9fs_vfs_rmdir, 11472bad8471SEric Van Hensbergen .mknod = v9fs_vfs_mknod, 11482bad8471SEric Van Hensbergen .rename = v9fs_vfs_rename, 11492bad8471SEric Van Hensbergen .readlink = v9fs_vfs_readlink, 11502bad8471SEric Van Hensbergen .getattr = v9fs_vfs_getattr, 11512bad8471SEric Van Hensbergen .setattr = v9fs_vfs_setattr, 11522bad8471SEric Van Hensbergen }; 11532bad8471SEric Van Hensbergen 1154754661f1SArjan van de Ven static const struct inode_operations v9fs_dir_inode_operations = { 1155b501611aSEric Van Hensbergen .create = v9fs_vfs_create, 1156b501611aSEric Van Hensbergen .lookup = v9fs_vfs_lookup, 1157b501611aSEric Van Hensbergen .unlink = v9fs_vfs_unlink, 1158b501611aSEric Van Hensbergen .mkdir = v9fs_vfs_mkdir, 1159b501611aSEric Van Hensbergen .rmdir = v9fs_vfs_rmdir, 1160b501611aSEric Van Hensbergen .mknod = v9fs_vfs_mknod, 1161b501611aSEric Van Hensbergen .rename = v9fs_vfs_rename, 1162b501611aSEric Van Hensbergen .getattr = v9fs_vfs_getattr, 1163b501611aSEric Van Hensbergen .setattr = v9fs_vfs_setattr, 1164b501611aSEric Van Hensbergen }; 1165b501611aSEric Van Hensbergen 1166754661f1SArjan van de Ven static const struct inode_operations v9fs_file_inode_operations = { 11672bad8471SEric Van Hensbergen .getattr = v9fs_vfs_getattr, 11682bad8471SEric Van Hensbergen .setattr = v9fs_vfs_setattr, 11692bad8471SEric Van Hensbergen }; 11702bad8471SEric Van Hensbergen 1171754661f1SArjan van de Ven static const struct inode_operations v9fs_symlink_inode_operations = { 11722bad8471SEric Van Hensbergen .readlink = v9fs_vfs_readlink, 11732bad8471SEric Van Hensbergen .follow_link = v9fs_vfs_follow_link, 11742bad8471SEric Van Hensbergen .put_link = v9fs_vfs_put_link, 11752bad8471SEric Van Hensbergen .getattr = v9fs_vfs_getattr, 11762bad8471SEric Van Hensbergen .setattr = v9fs_vfs_setattr, 11772bad8471SEric Van Hensbergen }; 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