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 132ee443996SEric Van Hensbergen /** 133ee443996SEric Van Hensbergen * v9fs_uflags2omode- convert posix open flags to plan 9 mode bits 134ee443996SEric Van Hensbergen * @uflags: flags to convert 135ee443996SEric Van Hensbergen * 136ee443996SEric Van Hensbergen */ 137ee443996SEric Van Hensbergen 1386a3124a3SLatchesar Ionkov int v9fs_uflags2omode(int uflags) 1396a3124a3SLatchesar Ionkov { 1406a3124a3SLatchesar Ionkov int ret; 1416a3124a3SLatchesar Ionkov 1426a3124a3SLatchesar Ionkov ret = 0; 1436a3124a3SLatchesar Ionkov switch (uflags&3) { 1446a3124a3SLatchesar Ionkov default: 1456a3124a3SLatchesar Ionkov case O_RDONLY: 146bd238fb4SLatchesar Ionkov ret = P9_OREAD; 1476a3124a3SLatchesar Ionkov break; 1486a3124a3SLatchesar Ionkov 1496a3124a3SLatchesar Ionkov case O_WRONLY: 150bd238fb4SLatchesar Ionkov ret = P9_OWRITE; 1516a3124a3SLatchesar Ionkov break; 1526a3124a3SLatchesar Ionkov 1536a3124a3SLatchesar Ionkov case O_RDWR: 154bd238fb4SLatchesar Ionkov ret = P9_ORDWR; 1556a3124a3SLatchesar Ionkov break; 1566a3124a3SLatchesar Ionkov } 1576a3124a3SLatchesar Ionkov 1586a3124a3SLatchesar Ionkov if (uflags & O_EXCL) 159bd238fb4SLatchesar Ionkov ret |= P9_OEXCL; 1606a3124a3SLatchesar Ionkov 1616a3124a3SLatchesar Ionkov if (uflags & O_TRUNC) 162bd238fb4SLatchesar Ionkov ret |= P9_OTRUNC; 1636a3124a3SLatchesar Ionkov 1646a3124a3SLatchesar Ionkov if (uflags & O_APPEND) 165bd238fb4SLatchesar Ionkov ret |= P9_OAPPEND; 1666a3124a3SLatchesar Ionkov 1676a3124a3SLatchesar Ionkov return ret; 1686a3124a3SLatchesar Ionkov } 1696a3124a3SLatchesar Ionkov 1702bad8471SEric Van Hensbergen /** 171531b1094SLatchesar Ionkov * v9fs_blank_wstat - helper function to setup a 9P stat structure 1722bad8471SEric Van Hensbergen * @v9ses: 9P session info (for determining extended mode) 173531b1094SLatchesar Ionkov * @wstat: structure to initialize 1742bad8471SEric Van Hensbergen * 1752bad8471SEric Van Hensbergen */ 1762bad8471SEric Van Hensbergen 17773c592b9SEric Van Hensbergen static void 178bd238fb4SLatchesar Ionkov v9fs_blank_wstat(struct p9_wstat *wstat) 1792bad8471SEric Van Hensbergen { 180531b1094SLatchesar Ionkov wstat->type = ~0; 181531b1094SLatchesar Ionkov wstat->dev = ~0; 182531b1094SLatchesar Ionkov wstat->qid.type = ~0; 183531b1094SLatchesar Ionkov wstat->qid.version = ~0; 184531b1094SLatchesar Ionkov *((long long *)&wstat->qid.path) = ~0; 185531b1094SLatchesar Ionkov wstat->mode = ~0; 186531b1094SLatchesar Ionkov wstat->atime = ~0; 187531b1094SLatchesar Ionkov wstat->mtime = ~0; 188531b1094SLatchesar Ionkov wstat->length = ~0; 189531b1094SLatchesar Ionkov wstat->name = NULL; 190531b1094SLatchesar Ionkov wstat->uid = NULL; 191531b1094SLatchesar Ionkov wstat->gid = NULL; 192531b1094SLatchesar Ionkov wstat->muid = NULL; 193531b1094SLatchesar Ionkov wstat->n_uid = ~0; 194531b1094SLatchesar Ionkov wstat->n_gid = ~0; 195531b1094SLatchesar Ionkov wstat->n_muid = ~0; 196531b1094SLatchesar Ionkov wstat->extension = NULL; 1972bad8471SEric Van Hensbergen } 1982bad8471SEric Van Hensbergen 1992bad8471SEric Van Hensbergen /** 2002bad8471SEric Van Hensbergen * v9fs_get_inode - helper function to setup an inode 2012bad8471SEric Van Hensbergen * @sb: superblock 2022bad8471SEric Van Hensbergen * @mode: mode to setup inode with 2032bad8471SEric Van Hensbergen * 2042bad8471SEric Van Hensbergen */ 2052bad8471SEric Van Hensbergen 2062bad8471SEric Van Hensbergen struct inode *v9fs_get_inode(struct super_block *sb, int mode) 2072bad8471SEric Van Hensbergen { 2086a3124a3SLatchesar Ionkov struct inode *inode; 209b501611aSEric Van Hensbergen struct v9fs_session_info *v9ses = sb->s_fs_info; 2102bad8471SEric Van Hensbergen 211bd238fb4SLatchesar Ionkov P9_DPRINTK(P9_DEBUG_VFS, "super block: %p mode: %o\n", sb, mode); 2122bad8471SEric Van Hensbergen 2132bad8471SEric Van Hensbergen inode = new_inode(sb); 2142bad8471SEric Van Hensbergen if (inode) { 2152bad8471SEric Van Hensbergen inode->i_mode = mode; 2162bad8471SEric Van Hensbergen inode->i_uid = current->fsuid; 2172bad8471SEric Van Hensbergen inode->i_gid = current->fsgid; 2182bad8471SEric Van Hensbergen inode->i_blocks = 0; 2192bad8471SEric Van Hensbergen inode->i_rdev = 0; 2202bad8471SEric Van Hensbergen inode->i_atime = inode->i_mtime = inode->i_ctime = CURRENT_TIME; 221147b31cfSEric Van Hensbergen inode->i_mapping->a_ops = &v9fs_addr_operations; 2222bad8471SEric Van Hensbergen 2232bad8471SEric Van Hensbergen switch (mode & S_IFMT) { 2242bad8471SEric Van Hensbergen case S_IFIFO: 2252bad8471SEric Van Hensbergen case S_IFBLK: 2262bad8471SEric Van Hensbergen case S_IFCHR: 2272bad8471SEric Van Hensbergen case S_IFSOCK: 2282405669bSLatchesar Ionkov if (!v9fs_extended(v9ses)) { 229bd238fb4SLatchesar Ionkov P9_DPRINTK(P9_DEBUG_ERROR, 230bd238fb4SLatchesar Ionkov "special files without extended mode\n"); 231b501611aSEric Van Hensbergen return ERR_PTR(-EINVAL); 232b501611aSEric Van Hensbergen } 2335d58bec5SEric Van Hensbergen init_special_inode(inode, inode->i_mode, 2345d58bec5SEric Van Hensbergen inode->i_rdev); 2355d58bec5SEric Van Hensbergen break; 2362bad8471SEric Van Hensbergen case S_IFREG: 2372bad8471SEric Van Hensbergen inode->i_op = &v9fs_file_inode_operations; 2382bad8471SEric Van Hensbergen inode->i_fop = &v9fs_file_operations; 2392bad8471SEric Van Hensbergen break; 240b501611aSEric Van Hensbergen case S_IFLNK: 2412405669bSLatchesar Ionkov if (!v9fs_extended(v9ses)) { 242bd238fb4SLatchesar Ionkov P9_DPRINTK(P9_DEBUG_ERROR, 243bd238fb4SLatchesar Ionkov "extended modes used w/o 9P2000.u\n"); 244b501611aSEric Van Hensbergen return ERR_PTR(-EINVAL); 245b501611aSEric Van Hensbergen } 246b501611aSEric Van Hensbergen inode->i_op = &v9fs_symlink_inode_operations; 247b501611aSEric Van Hensbergen break; 2482bad8471SEric Van Hensbergen case S_IFDIR: 249d8c76e6fSDave Hansen inc_nlink(inode); 2502405669bSLatchesar Ionkov if (v9fs_extended(v9ses)) 251b501611aSEric Van Hensbergen inode->i_op = &v9fs_dir_inode_operations_ext; 252b501611aSEric Van Hensbergen else 2532bad8471SEric Van Hensbergen inode->i_op = &v9fs_dir_inode_operations; 2542bad8471SEric Van Hensbergen inode->i_fop = &v9fs_dir_operations; 2552bad8471SEric Van Hensbergen break; 2562bad8471SEric Van Hensbergen default: 257bd238fb4SLatchesar Ionkov P9_DPRINTK(P9_DEBUG_ERROR, 258bd238fb4SLatchesar Ionkov "BAD mode 0x%x S_IFMT 0x%x\n", 2592bad8471SEric Van Hensbergen mode, mode & S_IFMT); 2602bad8471SEric Van Hensbergen return ERR_PTR(-EINVAL); 2612bad8471SEric Van Hensbergen } 2622bad8471SEric Van Hensbergen } else { 263bd238fb4SLatchesar Ionkov P9_EPRINTK(KERN_WARNING, "Problem allocating inode\n"); 2642bad8471SEric Van Hensbergen return ERR_PTR(-ENOMEM); 2652bad8471SEric Van Hensbergen } 2662bad8471SEric Van Hensbergen return inode; 2672bad8471SEric Van Hensbergen } 2682bad8471SEric Van Hensbergen 269bd238fb4SLatchesar Ionkov /* 2706a3124a3SLatchesar Ionkov static struct v9fs_fid* 2716a3124a3SLatchesar Ionkov v9fs_clone_walk(struct v9fs_session_info *v9ses, u32 fid, struct dentry *dentry) 2726a3124a3SLatchesar Ionkov { 2736a3124a3SLatchesar Ionkov int err; 274736c4b85SMika Kukkonen int nfid; 2756a3124a3SLatchesar Ionkov struct v9fs_fid *ret; 2766a3124a3SLatchesar Ionkov struct v9fs_fcall *fcall; 2770b8dd177SLatchesar Ionkov 2786a3124a3SLatchesar Ionkov nfid = v9fs_get_idpool(&v9ses->fidpool); 2796a3124a3SLatchesar Ionkov if (nfid < 0) { 2800b8dd177SLatchesar Ionkov eprintk(KERN_WARNING, "no free fids available\n"); 281731805b4SLatchesar Ionkov return ERR_PTR(-ENOSPC); 2820b8dd177SLatchesar Ionkov } 2830b8dd177SLatchesar Ionkov 2846a3124a3SLatchesar Ionkov err = v9fs_t_walk(v9ses, fid, nfid, (char *) dentry->d_name.name, 2856a3124a3SLatchesar Ionkov &fcall); 2866a3124a3SLatchesar Ionkov 2876a3124a3SLatchesar Ionkov if (err < 0) { 28841e5a6acSLatchesar Ionkov if (fcall && fcall->id == RWALK) 28941e5a6acSLatchesar Ionkov goto clunk_fid; 29041e5a6acSLatchesar Ionkov 2916a3124a3SLatchesar Ionkov PRINT_FCALL_ERROR("walk error", fcall); 2926a3124a3SLatchesar Ionkov v9fs_put_idpool(nfid, &v9ses->fidpool); 2936a3124a3SLatchesar Ionkov goto error; 2940b8dd177SLatchesar Ionkov } 2956a3124a3SLatchesar Ionkov 2963cf6429aSLatchesar Ionkov kfree(fcall); 2973cf6429aSLatchesar Ionkov fcall = NULL; 2986a3124a3SLatchesar Ionkov ret = v9fs_fid_create(v9ses, nfid); 2996a3124a3SLatchesar Ionkov if (!ret) { 3006a3124a3SLatchesar Ionkov err = -ENOMEM; 3016a3124a3SLatchesar Ionkov goto clunk_fid; 3020b8dd177SLatchesar Ionkov } 3032bad8471SEric Van Hensbergen 3046a3124a3SLatchesar Ionkov err = v9fs_fid_insert(ret, dentry); 3056a3124a3SLatchesar Ionkov if (err < 0) { 3066a3124a3SLatchesar Ionkov v9fs_fid_destroy(ret); 3076a3124a3SLatchesar Ionkov goto clunk_fid; 3086a3124a3SLatchesar Ionkov } 3092bad8471SEric Van Hensbergen 3106a3124a3SLatchesar Ionkov return ret; 3116a3124a3SLatchesar Ionkov 3126a3124a3SLatchesar Ionkov clunk_fid: 3136a3124a3SLatchesar Ionkov v9fs_t_clunk(v9ses, nfid); 3146a3124a3SLatchesar Ionkov 3156a3124a3SLatchesar Ionkov error: 3166a3124a3SLatchesar Ionkov kfree(fcall); 3176a3124a3SLatchesar Ionkov return ERR_PTR(err); 3186a3124a3SLatchesar Ionkov } 319bd238fb4SLatchesar Ionkov */ 3206a3124a3SLatchesar Ionkov 321ee443996SEric Van Hensbergen /** 322ee443996SEric Van Hensbergen * v9fs_inode_from_fid - populate an inode by issuing a attribute request 323ee443996SEric Van Hensbergen * @v9ses: session information 324ee443996SEric Van Hensbergen * @fid: fid to issue attribute request for 325ee443996SEric Van Hensbergen * @sb: superblock on which to create inode 326ee443996SEric Van Hensbergen * 327ee443996SEric Van Hensbergen */ 328ee443996SEric Van Hensbergen 3295174fdabSLatchesar Ionkov static struct inode * 330bd238fb4SLatchesar Ionkov v9fs_inode_from_fid(struct v9fs_session_info *v9ses, struct p9_fid *fid, 3316a3124a3SLatchesar Ionkov struct super_block *sb) 3326a3124a3SLatchesar Ionkov { 3336a3124a3SLatchesar Ionkov int err, umode; 3346a3124a3SLatchesar Ionkov struct inode *ret; 335bd238fb4SLatchesar Ionkov struct p9_stat *st; 3366a3124a3SLatchesar Ionkov 3376a3124a3SLatchesar Ionkov ret = NULL; 338bd238fb4SLatchesar Ionkov st = p9_client_stat(fid); 339bd238fb4SLatchesar Ionkov if (IS_ERR(st)) { 340bd238fb4SLatchesar Ionkov err = PTR_ERR(st); 341bd238fb4SLatchesar Ionkov st = NULL; 3426a3124a3SLatchesar Ionkov goto error; 3432bad8471SEric Van Hensbergen } 3442bad8471SEric Van Hensbergen 345bd238fb4SLatchesar Ionkov umode = p9mode2unixmode(v9ses, st->mode); 3466a3124a3SLatchesar Ionkov ret = v9fs_get_inode(sb, umode); 3476a3124a3SLatchesar Ionkov if (IS_ERR(ret)) { 3486a3124a3SLatchesar Ionkov err = PTR_ERR(ret); 3496a3124a3SLatchesar Ionkov ret = NULL; 3506a3124a3SLatchesar Ionkov goto error; 3512bad8471SEric Van Hensbergen } 3522bad8471SEric Van Hensbergen 353bd238fb4SLatchesar Ionkov v9fs_stat2inode(st, ret, sb); 354bd238fb4SLatchesar Ionkov ret->i_ino = v9fs_qid2ino(&st->qid); 355bd238fb4SLatchesar Ionkov kfree(st); 3566a3124a3SLatchesar Ionkov return ret; 3572bad8471SEric Van Hensbergen 3586a3124a3SLatchesar Ionkov error: 359bd238fb4SLatchesar Ionkov kfree(st); 3606a3124a3SLatchesar Ionkov if (ret) 3616a3124a3SLatchesar Ionkov iput(ret); 3622bad8471SEric Van Hensbergen 3636a3124a3SLatchesar Ionkov return ERR_PTR(err); 3642bad8471SEric Van Hensbergen } 3652bad8471SEric Van Hensbergen 3662bad8471SEric Van Hensbergen /** 3672bad8471SEric Van Hensbergen * v9fs_remove - helper function to remove files and directories 36873c592b9SEric Van Hensbergen * @dir: directory inode that is being deleted 36973c592b9SEric Van Hensbergen * @file: dentry that is being deleted 37073c592b9SEric Van Hensbergen * @rmdir: removing a directory 3712bad8471SEric Van Hensbergen * 3722bad8471SEric Van Hensbergen */ 3732bad8471SEric Van Hensbergen 3742bad8471SEric Van Hensbergen static int v9fs_remove(struct inode *dir, struct dentry *file, int rmdir) 3752bad8471SEric Van Hensbergen { 376bd238fb4SLatchesar Ionkov struct inode *file_inode; 377bd238fb4SLatchesar Ionkov struct v9fs_session_info *v9ses; 378bd238fb4SLatchesar Ionkov struct p9_fid *v9fid; 3792bad8471SEric Van Hensbergen 380bd238fb4SLatchesar Ionkov P9_DPRINTK(P9_DEBUG_VFS, "inode: %p dentry: %p rmdir: %d\n", dir, file, 3812bad8471SEric Van Hensbergen rmdir); 3822bad8471SEric Van Hensbergen 3832bad8471SEric Van Hensbergen file_inode = file->d_inode; 3842bad8471SEric Van Hensbergen v9ses = v9fs_inode2v9ses(file_inode); 385c959df9fSLatchesar Ionkov v9fid = v9fs_fid_clone(file); 386da977b2cSEric Van Hensbergen if (IS_ERR(v9fid)) 387da977b2cSEric Van Hensbergen return PTR_ERR(v9fid); 3882bad8471SEric Van Hensbergen 389bd238fb4SLatchesar Ionkov return p9_client_remove(v9fid); 3902bad8471SEric Van Hensbergen } 3912bad8471SEric Van Hensbergen 3926a3124a3SLatchesar Ionkov static int 3936a3124a3SLatchesar Ionkov v9fs_open_created(struct inode *inode, struct file *file) 3946a3124a3SLatchesar Ionkov { 3956a3124a3SLatchesar Ionkov return 0; 3966a3124a3SLatchesar Ionkov } 3976a3124a3SLatchesar Ionkov 398bd238fb4SLatchesar Ionkov 399bd238fb4SLatchesar Ionkov /** 400bd238fb4SLatchesar Ionkov * v9fs_create - Create a file 401ee443996SEric Van Hensbergen * @v9ses: session information 402ee443996SEric Van Hensbergen * @dir: directory that dentry is being created in 403bd238fb4SLatchesar Ionkov * @dentry: dentry that is being created 404bd238fb4SLatchesar Ionkov * @perm: create permissions 405bd238fb4SLatchesar Ionkov * @mode: open mode 406ee443996SEric Van Hensbergen * @extension: 9p2000.u extension string to support devices, etc. 407bd238fb4SLatchesar Ionkov * 408bd238fb4SLatchesar Ionkov */ 409bd238fb4SLatchesar Ionkov static struct p9_fid * 410bd238fb4SLatchesar Ionkov v9fs_create(struct v9fs_session_info *v9ses, struct inode *dir, 411bd238fb4SLatchesar Ionkov struct dentry *dentry, char *extension, u32 perm, u8 mode) 412bd238fb4SLatchesar Ionkov { 413bd238fb4SLatchesar Ionkov int err; 414bd238fb4SLatchesar Ionkov char *name; 415bd238fb4SLatchesar Ionkov struct p9_fid *dfid, *ofid, *fid; 416bd238fb4SLatchesar Ionkov struct inode *inode; 417bd238fb4SLatchesar Ionkov 418bd238fb4SLatchesar Ionkov err = 0; 419bd238fb4SLatchesar Ionkov ofid = NULL; 420bd238fb4SLatchesar Ionkov fid = NULL; 421bd238fb4SLatchesar Ionkov name = (char *) dentry->d_name.name; 422bd238fb4SLatchesar Ionkov dfid = v9fs_fid_clone(dentry->d_parent); 423bd238fb4SLatchesar Ionkov if (IS_ERR(dfid)) { 424bd238fb4SLatchesar Ionkov err = PTR_ERR(dfid); 425bd238fb4SLatchesar Ionkov dfid = NULL; 426bd238fb4SLatchesar Ionkov goto error; 427bd238fb4SLatchesar Ionkov } 428bd238fb4SLatchesar Ionkov 429bd238fb4SLatchesar Ionkov /* clone a fid to use for creation */ 430bd238fb4SLatchesar Ionkov ofid = p9_client_walk(dfid, 0, NULL, 1); 431bd238fb4SLatchesar Ionkov if (IS_ERR(ofid)) { 432bd238fb4SLatchesar Ionkov err = PTR_ERR(ofid); 433bd238fb4SLatchesar Ionkov ofid = NULL; 434bd238fb4SLatchesar Ionkov goto error; 435bd238fb4SLatchesar Ionkov } 436bd238fb4SLatchesar Ionkov 437bd238fb4SLatchesar Ionkov err = p9_client_fcreate(ofid, name, perm, mode, extension); 438bd238fb4SLatchesar Ionkov if (err < 0) 439bd238fb4SLatchesar Ionkov goto error; 440bd238fb4SLatchesar Ionkov 441bd238fb4SLatchesar Ionkov /* now walk from the parent so we can get unopened fid */ 442bd238fb4SLatchesar Ionkov fid = p9_client_walk(dfid, 1, &name, 0); 443bd238fb4SLatchesar Ionkov if (IS_ERR(fid)) { 444bd238fb4SLatchesar Ionkov err = PTR_ERR(fid); 445bd238fb4SLatchesar Ionkov fid = NULL; 446bd238fb4SLatchesar Ionkov goto error; 447bd238fb4SLatchesar Ionkov } else 448bd238fb4SLatchesar Ionkov dfid = NULL; 449bd238fb4SLatchesar Ionkov 450bd238fb4SLatchesar Ionkov /* instantiate inode and assign the unopened fid to the dentry */ 451bd238fb4SLatchesar Ionkov inode = v9fs_inode_from_fid(v9ses, fid, dir->i_sb); 452bd238fb4SLatchesar Ionkov if (IS_ERR(inode)) { 453bd238fb4SLatchesar Ionkov err = PTR_ERR(inode); 454bd238fb4SLatchesar Ionkov goto error; 455bd238fb4SLatchesar Ionkov } 456bd238fb4SLatchesar Ionkov 457bd238fb4SLatchesar Ionkov if (v9ses->cache) 458bd238fb4SLatchesar Ionkov dentry->d_op = &v9fs_cached_dentry_operations; 459bd238fb4SLatchesar Ionkov else 460bd238fb4SLatchesar Ionkov dentry->d_op = &v9fs_dentry_operations; 461bd238fb4SLatchesar Ionkov 462bd238fb4SLatchesar Ionkov d_instantiate(dentry, inode); 463bd238fb4SLatchesar Ionkov v9fs_fid_add(dentry, fid); 464bd238fb4SLatchesar Ionkov return ofid; 465bd238fb4SLatchesar Ionkov 466bd238fb4SLatchesar Ionkov error: 467bd238fb4SLatchesar Ionkov if (dfid) 468bd238fb4SLatchesar Ionkov p9_client_clunk(dfid); 469bd238fb4SLatchesar Ionkov 470bd238fb4SLatchesar Ionkov if (ofid) 471bd238fb4SLatchesar Ionkov p9_client_clunk(ofid); 472bd238fb4SLatchesar Ionkov 473bd238fb4SLatchesar Ionkov if (fid) 474bd238fb4SLatchesar Ionkov p9_client_clunk(fid); 475bd238fb4SLatchesar Ionkov 476bd238fb4SLatchesar Ionkov return ERR_PTR(err); 477bd238fb4SLatchesar Ionkov } 478bd238fb4SLatchesar Ionkov 4792bad8471SEric Van Hensbergen /** 4802bad8471SEric Van Hensbergen * v9fs_vfs_create - VFS hook to create files 481ee443996SEric Van Hensbergen * @dir: directory inode that is being created 4822bad8471SEric Van Hensbergen * @dentry: dentry that is being deleted 4836a3124a3SLatchesar Ionkov * @mode: create permissions 4842bad8471SEric Van Hensbergen * @nd: path information 4852bad8471SEric Van Hensbergen * 4862bad8471SEric Van Hensbergen */ 4872bad8471SEric Van Hensbergen 4882bad8471SEric Van Hensbergen static int 4896a3124a3SLatchesar Ionkov v9fs_vfs_create(struct inode *dir, struct dentry *dentry, int mode, 4902bad8471SEric Van Hensbergen struct nameidata *nd) 4912bad8471SEric Van Hensbergen { 4926a3124a3SLatchesar Ionkov int err; 493bd238fb4SLatchesar Ionkov u32 perm; 4946a3124a3SLatchesar Ionkov int flags; 4956a3124a3SLatchesar Ionkov struct v9fs_session_info *v9ses; 496bd238fb4SLatchesar Ionkov struct p9_fid *fid; 4976a3124a3SLatchesar Ionkov struct file *filp; 4986a3124a3SLatchesar Ionkov 499bd238fb4SLatchesar Ionkov err = 0; 500bd238fb4SLatchesar Ionkov fid = NULL; 5016a3124a3SLatchesar Ionkov v9ses = v9fs_inode2v9ses(dir); 502da977b2cSEric Van Hensbergen perm = unixmode2p9mode(v9ses, mode); 5036a3124a3SLatchesar Ionkov if (nd && nd->flags & LOOKUP_OPEN) 5046a3124a3SLatchesar Ionkov flags = nd->intent.open.flags - 1; 5056a3124a3SLatchesar Ionkov else 5066a3124a3SLatchesar Ionkov flags = O_RDWR; 5076a3124a3SLatchesar Ionkov 508bd238fb4SLatchesar Ionkov fid = v9fs_create(v9ses, dir, dentry, NULL, perm, 509bd238fb4SLatchesar Ionkov v9fs_uflags2omode(flags)); 510bd238fb4SLatchesar Ionkov if (IS_ERR(fid)) { 511bd238fb4SLatchesar Ionkov err = PTR_ERR(fid); 512bd238fb4SLatchesar Ionkov fid = NULL; 5136a3124a3SLatchesar Ionkov goto error; 5146a3124a3SLatchesar Ionkov } 5156a3124a3SLatchesar Ionkov 516bd238fb4SLatchesar Ionkov /* if we are opening a file, assign the open fid to the file */ 5176a3124a3SLatchesar Ionkov if (nd && nd->flags & LOOKUP_OPEN) { 5186a3124a3SLatchesar Ionkov filp = lookup_instantiate_filp(nd, dentry, v9fs_open_created); 5196a3124a3SLatchesar Ionkov if (IS_ERR(filp)) { 520bd238fb4SLatchesar Ionkov err = PTR_ERR(filp); 521bd238fb4SLatchesar Ionkov goto error; 5226a3124a3SLatchesar Ionkov } 5236a3124a3SLatchesar Ionkov 524bd238fb4SLatchesar Ionkov filp->private_data = fid; 525bd238fb4SLatchesar Ionkov } else 526bd238fb4SLatchesar Ionkov p9_client_clunk(fid); 5276a3124a3SLatchesar Ionkov 5286a3124a3SLatchesar Ionkov return 0; 5296a3124a3SLatchesar Ionkov 5306a3124a3SLatchesar Ionkov error: 531bd238fb4SLatchesar Ionkov if (fid) 532bd238fb4SLatchesar Ionkov p9_client_clunk(fid); 5336a3124a3SLatchesar Ionkov 5346a3124a3SLatchesar Ionkov return err; 5352bad8471SEric Van Hensbergen } 5362bad8471SEric Van Hensbergen 5372bad8471SEric Van Hensbergen /** 5382bad8471SEric Van Hensbergen * v9fs_vfs_mkdir - VFS mkdir hook to create a directory 539ee443996SEric Van Hensbergen * @dir: inode that is being unlinked 5402bad8471SEric Van Hensbergen * @dentry: dentry that is being unlinked 5412bad8471SEric Van Hensbergen * @mode: mode for new directory 5422bad8471SEric Van Hensbergen * 5432bad8471SEric Van Hensbergen */ 5442bad8471SEric Van Hensbergen 5456a3124a3SLatchesar Ionkov static int v9fs_vfs_mkdir(struct inode *dir, struct dentry *dentry, int mode) 5462bad8471SEric Van Hensbergen { 5476a3124a3SLatchesar Ionkov int err; 548bd238fb4SLatchesar Ionkov u32 perm; 5496a3124a3SLatchesar Ionkov struct v9fs_session_info *v9ses; 550bd238fb4SLatchesar Ionkov struct p9_fid *fid; 5516a3124a3SLatchesar Ionkov 552bd238fb4SLatchesar Ionkov P9_DPRINTK(P9_DEBUG_VFS, "name %s\n", dentry->d_name.name); 553bd238fb4SLatchesar Ionkov err = 0; 5546a3124a3SLatchesar Ionkov v9ses = v9fs_inode2v9ses(dir); 5556a3124a3SLatchesar Ionkov perm = unixmode2p9mode(v9ses, mode | S_IFDIR); 556bd238fb4SLatchesar Ionkov fid = v9fs_create(v9ses, dir, dentry, NULL, perm, P9_OREAD); 557bd238fb4SLatchesar Ionkov if (IS_ERR(fid)) { 558bd238fb4SLatchesar Ionkov err = PTR_ERR(fid); 559bd238fb4SLatchesar Ionkov fid = NULL; 5606a3124a3SLatchesar Ionkov } 5616a3124a3SLatchesar Ionkov 562bd238fb4SLatchesar Ionkov if (fid) 563bd238fb4SLatchesar Ionkov p9_client_clunk(fid); 5646a3124a3SLatchesar Ionkov 5656a3124a3SLatchesar Ionkov return err; 5662bad8471SEric Van Hensbergen } 5672bad8471SEric Van Hensbergen 5682bad8471SEric Van Hensbergen /** 5692bad8471SEric Van Hensbergen * v9fs_vfs_lookup - VFS lookup hook to "walk" to a new inode 5702bad8471SEric Van Hensbergen * @dir: inode that is being walked from 5712bad8471SEric Van Hensbergen * @dentry: dentry that is being walked to? 5722bad8471SEric Van Hensbergen * @nameidata: path data 5732bad8471SEric Van Hensbergen * 5742bad8471SEric Van Hensbergen */ 5752bad8471SEric Van Hensbergen 5762bad8471SEric Van Hensbergen static struct dentry *v9fs_vfs_lookup(struct inode *dir, struct dentry *dentry, 5772bad8471SEric Van Hensbergen struct nameidata *nameidata) 5782bad8471SEric Van Hensbergen { 5792bad8471SEric Van Hensbergen struct super_block *sb; 5802bad8471SEric Van Hensbergen struct v9fs_session_info *v9ses; 581bd238fb4SLatchesar Ionkov struct p9_fid *dfid, *fid; 5822bad8471SEric Van Hensbergen struct inode *inode; 583bd238fb4SLatchesar Ionkov char *name; 5842bad8471SEric Van Hensbergen int result = 0; 5852bad8471SEric Van Hensbergen 586bd238fb4SLatchesar Ionkov P9_DPRINTK(P9_DEBUG_VFS, "dir: %p dentry: (%s) %p nameidata: %p\n", 587731805b4SLatchesar Ionkov dir, dentry->d_name.name, dentry, nameidata); 5882bad8471SEric Van Hensbergen 5892bad8471SEric Van Hensbergen sb = dir->i_sb; 5902bad8471SEric Van Hensbergen v9ses = v9fs_inode2v9ses(dir); 591bd238fb4SLatchesar Ionkov dfid = v9fs_fid_lookup(dentry->d_parent); 592bd238fb4SLatchesar Ionkov if (IS_ERR(dfid)) 593e231c2eeSDavid Howells return ERR_CAST(dfid); 5942bad8471SEric Van Hensbergen 595bd238fb4SLatchesar Ionkov name = (char *) dentry->d_name.name; 596bd238fb4SLatchesar Ionkov fid = p9_client_walk(dfid, 1, &name, 1); 597bd238fb4SLatchesar Ionkov if (IS_ERR(fid)) { 598bd238fb4SLatchesar Ionkov result = PTR_ERR(fid); 5992bad8471SEric Van Hensbergen if (result == -ENOENT) { 6002bad8471SEric Van Hensbergen d_add(dentry, NULL); 6012bad8471SEric Van Hensbergen return NULL; 6022bad8471SEric Van Hensbergen } 6032bad8471SEric Van Hensbergen 604bd238fb4SLatchesar Ionkov return ERR_PTR(result); 6052bad8471SEric Van Hensbergen } 6062bad8471SEric Van Hensbergen 607bd238fb4SLatchesar Ionkov inode = v9fs_inode_from_fid(v9ses, fid, dir->i_sb); 608bd238fb4SLatchesar Ionkov if (IS_ERR(inode)) { 609bd238fb4SLatchesar Ionkov result = PTR_ERR(inode); 610bd238fb4SLatchesar Ionkov inode = NULL; 611bd238fb4SLatchesar Ionkov goto error; 6122bad8471SEric Van Hensbergen } 6132bad8471SEric Van Hensbergen 614bd238fb4SLatchesar Ionkov result = v9fs_fid_add(dentry, fid); 6156a3124a3SLatchesar Ionkov if (result < 0) 616bd238fb4SLatchesar Ionkov goto error; 6176a3124a3SLatchesar Ionkov 618e03abc0cSEric Van Hensbergen if ((fid->qid.version) && (v9ses->cache)) 619e03abc0cSEric Van Hensbergen dentry->d_op = &v9fs_cached_dentry_operations; 620e03abc0cSEric Van Hensbergen else 621e03abc0cSEric Van Hensbergen dentry->d_op = &v9fs_dentry_operations; 6222bad8471SEric Van Hensbergen 6232bad8471SEric Van Hensbergen d_add(dentry, inode); 6242bad8471SEric Van Hensbergen return NULL; 6252bad8471SEric Van Hensbergen 626bd238fb4SLatchesar Ionkov error: 627bd238fb4SLatchesar Ionkov if (fid) 628bd238fb4SLatchesar Ionkov p9_client_clunk(fid); 629da977b2cSEric Van Hensbergen 6302bad8471SEric Van Hensbergen return ERR_PTR(result); 6312bad8471SEric Van Hensbergen } 6322bad8471SEric Van Hensbergen 6332bad8471SEric Van Hensbergen /** 6342bad8471SEric Van Hensbergen * v9fs_vfs_unlink - VFS unlink hook to delete an inode 6352bad8471SEric Van Hensbergen * @i: inode that is being unlinked 63673c592b9SEric Van Hensbergen * @d: dentry that is being unlinked 6372bad8471SEric Van Hensbergen * 6382bad8471SEric Van Hensbergen */ 6392bad8471SEric Van Hensbergen 6402bad8471SEric Van Hensbergen static int v9fs_vfs_unlink(struct inode *i, struct dentry *d) 6412bad8471SEric Van Hensbergen { 6422bad8471SEric Van Hensbergen return v9fs_remove(i, d, 0); 6432bad8471SEric Van Hensbergen } 6442bad8471SEric Van Hensbergen 6452bad8471SEric Van Hensbergen /** 6462bad8471SEric Van Hensbergen * v9fs_vfs_rmdir - VFS unlink hook to delete a directory 6472bad8471SEric Van Hensbergen * @i: inode that is being unlinked 64873c592b9SEric Van Hensbergen * @d: dentry that is being unlinked 6492bad8471SEric Van Hensbergen * 6502bad8471SEric Van Hensbergen */ 6512bad8471SEric Van Hensbergen 6522bad8471SEric Van Hensbergen static int v9fs_vfs_rmdir(struct inode *i, struct dentry *d) 6532bad8471SEric Van Hensbergen { 6542bad8471SEric Van Hensbergen return v9fs_remove(i, d, 1); 6552bad8471SEric Van Hensbergen } 6562bad8471SEric Van Hensbergen 6572bad8471SEric Van Hensbergen /** 6582bad8471SEric Van Hensbergen * v9fs_vfs_rename - VFS hook to rename an inode 6592bad8471SEric Van Hensbergen * @old_dir: old dir inode 6602bad8471SEric Van Hensbergen * @old_dentry: old dentry 6612bad8471SEric Van Hensbergen * @new_dir: new dir inode 6622bad8471SEric Van Hensbergen * @new_dentry: new dentry 6632bad8471SEric Van Hensbergen * 6642bad8471SEric Van Hensbergen */ 6652bad8471SEric Van Hensbergen 6662bad8471SEric Van Hensbergen static int 6672bad8471SEric Van Hensbergen v9fs_vfs_rename(struct inode *old_dir, struct dentry *old_dentry, 6682bad8471SEric Van Hensbergen struct inode *new_dir, struct dentry *new_dentry) 6692bad8471SEric Van Hensbergen { 670bd238fb4SLatchesar Ionkov struct inode *old_inode; 671bd238fb4SLatchesar Ionkov struct v9fs_session_info *v9ses; 672bd238fb4SLatchesar Ionkov struct p9_fid *oldfid; 673bd238fb4SLatchesar Ionkov struct p9_fid *olddirfid; 674bd238fb4SLatchesar Ionkov struct p9_fid *newdirfid; 675bd238fb4SLatchesar Ionkov struct p9_wstat wstat; 676bd238fb4SLatchesar Ionkov int retval; 6772bad8471SEric Van Hensbergen 678bd238fb4SLatchesar Ionkov P9_DPRINTK(P9_DEBUG_VFS, "\n"); 679bd238fb4SLatchesar Ionkov retval = 0; 680bd238fb4SLatchesar Ionkov old_inode = old_dentry->d_inode; 681bd238fb4SLatchesar Ionkov v9ses = v9fs_inode2v9ses(old_inode); 682bd238fb4SLatchesar Ionkov oldfid = v9fs_fid_lookup(old_dentry); 683da977b2cSEric Van Hensbergen if (IS_ERR(oldfid)) 684da977b2cSEric Van Hensbergen return PTR_ERR(oldfid); 685da977b2cSEric Van Hensbergen 686da977b2cSEric Van Hensbergen olddirfid = v9fs_fid_clone(old_dentry->d_parent); 687da977b2cSEric Van Hensbergen if (IS_ERR(olddirfid)) { 688da977b2cSEric Van Hensbergen retval = PTR_ERR(olddirfid); 689bd238fb4SLatchesar Ionkov goto done; 690da977b2cSEric Van Hensbergen } 691da977b2cSEric Van Hensbergen 692da977b2cSEric Van Hensbergen newdirfid = v9fs_fid_clone(new_dentry->d_parent); 693da977b2cSEric Van Hensbergen if (IS_ERR(newdirfid)) { 694da977b2cSEric Van Hensbergen retval = PTR_ERR(newdirfid); 695bd238fb4SLatchesar Ionkov goto clunk_olddir; 6962bad8471SEric Van Hensbergen } 6972bad8471SEric Van Hensbergen 6982bad8471SEric Van Hensbergen /* 9P can only handle file rename in the same directory */ 6992bad8471SEric Van Hensbergen if (memcmp(&olddirfid->qid, &newdirfid->qid, sizeof(newdirfid->qid))) { 700bd238fb4SLatchesar Ionkov P9_DPRINTK(P9_DEBUG_ERROR, 701bd238fb4SLatchesar Ionkov "old dir and new dir are different\n"); 702621997cdSEric Van Hensbergen retval = -EXDEV; 703bd238fb4SLatchesar Ionkov goto clunk_newdir; 7042bad8471SEric Van Hensbergen } 7052bad8471SEric Van Hensbergen 706531b1094SLatchesar Ionkov v9fs_blank_wstat(&wstat); 707ba17674fSLatchesar Ionkov wstat.muid = v9ses->uname; 708531b1094SLatchesar Ionkov wstat.name = (char *) new_dentry->d_name.name; 709bd238fb4SLatchesar Ionkov retval = p9_client_wstat(oldfid, &wstat); 7102bad8471SEric Van Hensbergen 711bd238fb4SLatchesar Ionkov clunk_newdir: 71222150c4fSLatchesar Ionkov p9_client_clunk(newdirfid); 7132bad8471SEric Van Hensbergen 714bd238fb4SLatchesar Ionkov clunk_olddir: 71522150c4fSLatchesar Ionkov p9_client_clunk(olddirfid); 7162bad8471SEric Van Hensbergen 717bd238fb4SLatchesar Ionkov done: 7182bad8471SEric Van Hensbergen return retval; 7192bad8471SEric Van Hensbergen } 7202bad8471SEric Van Hensbergen 7212bad8471SEric Van Hensbergen /** 722943ffb58SAdrian Bunk * v9fs_vfs_getattr - retrieve file metadata 723ee443996SEric Van Hensbergen * @mnt: mount information 724ee443996SEric Van Hensbergen * @dentry: file to get attributes on 725ee443996SEric Van Hensbergen * @stat: metadata structure to populate 7262bad8471SEric Van Hensbergen * 7272bad8471SEric Van Hensbergen */ 7282bad8471SEric Van Hensbergen 7292bad8471SEric Van Hensbergen static int 7302bad8471SEric Van Hensbergen v9fs_vfs_getattr(struct vfsmount *mnt, struct dentry *dentry, 7312bad8471SEric Van Hensbergen struct kstat *stat) 7322bad8471SEric Van Hensbergen { 733bd238fb4SLatchesar Ionkov int err; 734bd238fb4SLatchesar Ionkov struct v9fs_session_info *v9ses; 735bd238fb4SLatchesar Ionkov struct p9_fid *fid; 736bd238fb4SLatchesar Ionkov struct p9_stat *st; 7372bad8471SEric Van Hensbergen 738bd238fb4SLatchesar Ionkov P9_DPRINTK(P9_DEBUG_VFS, "dentry: %p\n", dentry); 739bd238fb4SLatchesar Ionkov err = -EPERM; 740bd238fb4SLatchesar Ionkov v9ses = v9fs_inode2v9ses(dentry->d_inode); 7419523a841SEric Van Hensbergen if (v9ses->cache == CACHE_LOOSE) 7429523a841SEric Van Hensbergen return simple_getattr(mnt, dentry, stat); 7439523a841SEric Van Hensbergen 744bd238fb4SLatchesar Ionkov fid = v9fs_fid_lookup(dentry); 745da977b2cSEric Van Hensbergen if (IS_ERR(fid)) 746da977b2cSEric Van Hensbergen return PTR_ERR(fid); 7472bad8471SEric Van Hensbergen 748bd238fb4SLatchesar Ionkov st = p9_client_stat(fid); 749bd238fb4SLatchesar Ionkov if (IS_ERR(st)) 750bd238fb4SLatchesar Ionkov return PTR_ERR(st); 7512bad8471SEric Van Hensbergen 752bd238fb4SLatchesar Ionkov v9fs_stat2inode(st, dentry->d_inode, dentry->d_inode->i_sb); 7532bad8471SEric Van Hensbergen generic_fillattr(dentry->d_inode, stat); 7542bad8471SEric Van Hensbergen 755bd238fb4SLatchesar Ionkov kfree(st); 756bd238fb4SLatchesar Ionkov return 0; 7572bad8471SEric Van Hensbergen } 7582bad8471SEric Van Hensbergen 7592bad8471SEric Van Hensbergen /** 7602bad8471SEric Van Hensbergen * v9fs_vfs_setattr - set file metadata 7612bad8471SEric Van Hensbergen * @dentry: file whose metadata to set 7622bad8471SEric Van Hensbergen * @iattr: metadata assignment structure 7632bad8471SEric Van Hensbergen * 7642bad8471SEric Van Hensbergen */ 7652bad8471SEric Van Hensbergen 7662bad8471SEric Van Hensbergen static int v9fs_vfs_setattr(struct dentry *dentry, struct iattr *iattr) 7672bad8471SEric Van Hensbergen { 768bd238fb4SLatchesar Ionkov int retval; 769bd238fb4SLatchesar Ionkov struct v9fs_session_info *v9ses; 770bd238fb4SLatchesar Ionkov struct p9_fid *fid; 771bd238fb4SLatchesar Ionkov struct p9_wstat wstat; 7722bad8471SEric Van Hensbergen 773bd238fb4SLatchesar Ionkov P9_DPRINTK(P9_DEBUG_VFS, "\n"); 774bd238fb4SLatchesar Ionkov retval = -EPERM; 775bd238fb4SLatchesar Ionkov v9ses = v9fs_inode2v9ses(dentry->d_inode); 776bd238fb4SLatchesar Ionkov fid = v9fs_fid_lookup(dentry); 777da977b2cSEric Van Hensbergen if(IS_ERR(fid)) 778da977b2cSEric Van Hensbergen return PTR_ERR(fid); 7792bad8471SEric Van Hensbergen 780531b1094SLatchesar Ionkov v9fs_blank_wstat(&wstat); 7812bad8471SEric Van Hensbergen if (iattr->ia_valid & ATTR_MODE) 782531b1094SLatchesar Ionkov wstat.mode = unixmode2p9mode(v9ses, iattr->ia_mode); 7832bad8471SEric Van Hensbergen 7842bad8471SEric Van Hensbergen if (iattr->ia_valid & ATTR_MTIME) 785531b1094SLatchesar Ionkov wstat.mtime = iattr->ia_mtime.tv_sec; 7862bad8471SEric Van Hensbergen 7872bad8471SEric Van Hensbergen if (iattr->ia_valid & ATTR_ATIME) 788531b1094SLatchesar Ionkov wstat.atime = iattr->ia_atime.tv_sec; 7892bad8471SEric Van Hensbergen 7902bad8471SEric Van Hensbergen if (iattr->ia_valid & ATTR_SIZE) 791531b1094SLatchesar Ionkov wstat.length = iattr->ia_size; 7922bad8471SEric Van Hensbergen 7932405669bSLatchesar Ionkov if (v9fs_extended(v9ses)) { 794531b1094SLatchesar Ionkov if (iattr->ia_valid & ATTR_UID) 795531b1094SLatchesar Ionkov wstat.n_uid = iattr->ia_uid; 7962bad8471SEric Van Hensbergen 797531b1094SLatchesar Ionkov if (iattr->ia_valid & ATTR_GID) 798531b1094SLatchesar Ionkov wstat.n_gid = iattr->ia_gid; 7992bad8471SEric Van Hensbergen } 8002bad8471SEric Van Hensbergen 801bd238fb4SLatchesar Ionkov retval = p9_client_wstat(fid, &wstat); 802bd238fb4SLatchesar Ionkov if (retval >= 0) 803bd238fb4SLatchesar Ionkov retval = inode_setattr(dentry->d_inode, iattr); 8042bad8471SEric Van Hensbergen 805bd238fb4SLatchesar Ionkov return retval; 8062bad8471SEric Van Hensbergen } 8072bad8471SEric Van Hensbergen 8082bad8471SEric Van Hensbergen /** 809531b1094SLatchesar Ionkov * v9fs_stat2inode - populate an inode structure with mistat info 810531b1094SLatchesar Ionkov * @stat: Plan 9 metadata (mistat) structure 8112bad8471SEric Van Hensbergen * @inode: inode to populate 8122bad8471SEric Van Hensbergen * @sb: superblock of filesystem 8132bad8471SEric Van Hensbergen * 8142bad8471SEric Van Hensbergen */ 8152bad8471SEric Van Hensbergen 8162bad8471SEric Van Hensbergen void 817bd238fb4SLatchesar Ionkov v9fs_stat2inode(struct p9_stat *stat, struct inode *inode, 8182bad8471SEric Van Hensbergen struct super_block *sb) 8192bad8471SEric Van Hensbergen { 8201dac06b2SLatchesar Ionkov int n; 821531b1094SLatchesar Ionkov char ext[32]; 8222bad8471SEric Van Hensbergen struct v9fs_session_info *v9ses = sb->s_fs_info; 8232bad8471SEric Van Hensbergen 8242bad8471SEric Van Hensbergen inode->i_nlink = 1; 8252bad8471SEric Van Hensbergen 826531b1094SLatchesar Ionkov inode->i_atime.tv_sec = stat->atime; 827531b1094SLatchesar Ionkov inode->i_mtime.tv_sec = stat->mtime; 828531b1094SLatchesar Ionkov inode->i_ctime.tv_sec = stat->mtime; 8292bad8471SEric Van Hensbergen 830bd32b82dSLatchesar Ionkov inode->i_uid = v9ses->dfltuid; 831bd32b82dSLatchesar Ionkov inode->i_gid = v9ses->dfltgid; 8322bad8471SEric Van Hensbergen 8332405669bSLatchesar Ionkov if (v9fs_extended(v9ses)) { 834531b1094SLatchesar Ionkov inode->i_uid = stat->n_uid; 835531b1094SLatchesar Ionkov inode->i_gid = stat->n_gid; 836531b1094SLatchesar Ionkov } 837531b1094SLatchesar Ionkov 838531b1094SLatchesar Ionkov inode->i_mode = p9mode2unixmode(v9ses, stat->mode); 8392bad8471SEric Van Hensbergen if ((S_ISBLK(inode->i_mode)) || (S_ISCHR(inode->i_mode))) { 8402bad8471SEric Van Hensbergen char type = 0; 8412bad8471SEric Van Hensbergen int major = -1; 8422bad8471SEric Van Hensbergen int minor = -1; 843531b1094SLatchesar Ionkov 8441dac06b2SLatchesar Ionkov n = stat->extension.len; 8451dac06b2SLatchesar Ionkov if (n > sizeof(ext)-1) 8461dac06b2SLatchesar Ionkov n = sizeof(ext)-1; 8471dac06b2SLatchesar Ionkov memmove(ext, stat->extension.str, n); 8481dac06b2SLatchesar Ionkov ext[n] = 0; 849531b1094SLatchesar Ionkov sscanf(ext, "%c %u %u", &type, &major, &minor); 8502bad8471SEric Van Hensbergen switch (type) { 8512bad8471SEric Van Hensbergen case 'c': 8522bad8471SEric Van Hensbergen inode->i_mode &= ~S_IFBLK; 8532bad8471SEric Van Hensbergen inode->i_mode |= S_IFCHR; 8542bad8471SEric Van Hensbergen break; 8552bad8471SEric Van Hensbergen case 'b': 8562bad8471SEric Van Hensbergen break; 8572bad8471SEric Van Hensbergen default: 858bd238fb4SLatchesar Ionkov P9_DPRINTK(P9_DEBUG_ERROR, 859bd238fb4SLatchesar Ionkov "Unknown special type %c (%.*s)\n", type, 860bd238fb4SLatchesar Ionkov stat->extension.len, stat->extension.str); 8612bad8471SEric Van Hensbergen }; 8622bad8471SEric Van Hensbergen inode->i_rdev = MKDEV(major, minor); 8632bad8471SEric Van Hensbergen } else 8642bad8471SEric Van Hensbergen inode->i_rdev = 0; 8652bad8471SEric Van Hensbergen 866531b1094SLatchesar Ionkov inode->i_size = stat->length; 8672bad8471SEric Van Hensbergen 868bd238fb4SLatchesar Ionkov /* not real number of blocks, but 512 byte ones ... */ 869bd238fb4SLatchesar Ionkov inode->i_blocks = (inode->i_size + 512 - 1) >> 9; 8702bad8471SEric Van Hensbergen } 8712bad8471SEric Van Hensbergen 8722bad8471SEric Van Hensbergen /** 8732bad8471SEric Van Hensbergen * v9fs_qid2ino - convert qid into inode number 8742bad8471SEric Van Hensbergen * @qid: qid to hash 8752bad8471SEric Van Hensbergen * 8762bad8471SEric Van Hensbergen * BUG: potential for inode number collisions? 8772bad8471SEric Van Hensbergen */ 8782bad8471SEric Van Hensbergen 879bd238fb4SLatchesar Ionkov ino_t v9fs_qid2ino(struct p9_qid *qid) 8802bad8471SEric Van Hensbergen { 8812bad8471SEric Van Hensbergen u64 path = qid->path + 2; 8822bad8471SEric Van Hensbergen ino_t i = 0; 8832bad8471SEric Van Hensbergen 8842bad8471SEric Van Hensbergen if (sizeof(ino_t) == sizeof(path)) 8852bad8471SEric Van Hensbergen memcpy(&i, &path, sizeof(ino_t)); 8862bad8471SEric Van Hensbergen else 8872bad8471SEric Van Hensbergen i = (ino_t) (path ^ (path >> 32)); 8882bad8471SEric Van Hensbergen 8892bad8471SEric Van Hensbergen return i; 8902bad8471SEric Van Hensbergen } 8912bad8471SEric Van Hensbergen 8922bad8471SEric Van Hensbergen /** 8932bad8471SEric Van Hensbergen * v9fs_readlink - read a symlink's location (internal version) 8942bad8471SEric Van Hensbergen * @dentry: dentry for symlink 89573c592b9SEric Van Hensbergen * @buffer: buffer to load symlink location into 8962bad8471SEric Van Hensbergen * @buflen: length of buffer 8972bad8471SEric Van Hensbergen * 8982bad8471SEric Van Hensbergen */ 8992bad8471SEric Van Hensbergen 9002bad8471SEric Van Hensbergen static int v9fs_readlink(struct dentry *dentry, char *buffer, int buflen) 9012bad8471SEric Van Hensbergen { 902bd238fb4SLatchesar Ionkov int retval; 9032bad8471SEric Van Hensbergen 904bd238fb4SLatchesar Ionkov struct v9fs_session_info *v9ses; 905bd238fb4SLatchesar Ionkov struct p9_fid *fid; 906bd238fb4SLatchesar Ionkov struct p9_stat *st; 9072bad8471SEric Van Hensbergen 908bd238fb4SLatchesar Ionkov P9_DPRINTK(P9_DEBUG_VFS, " %s\n", dentry->d_name.name); 909bd238fb4SLatchesar Ionkov retval = -EPERM; 910bd238fb4SLatchesar Ionkov v9ses = v9fs_inode2v9ses(dentry->d_inode); 911bd238fb4SLatchesar Ionkov fid = v9fs_fid_lookup(dentry); 912da977b2cSEric Van Hensbergen if (IS_ERR(fid)) 913da977b2cSEric Van Hensbergen return PTR_ERR(fid); 9142bad8471SEric Van Hensbergen 9152405669bSLatchesar Ionkov if (!v9fs_extended(v9ses)) 916bd238fb4SLatchesar Ionkov return -EBADF; 9172bad8471SEric Van Hensbergen 918bd238fb4SLatchesar Ionkov st = p9_client_stat(fid); 919bd238fb4SLatchesar Ionkov if (IS_ERR(st)) 920bd238fb4SLatchesar Ionkov return PTR_ERR(st); 9212bad8471SEric Van Hensbergen 922bd238fb4SLatchesar Ionkov if (!(st->mode & P9_DMSYMLINK)) { 9232bad8471SEric Van Hensbergen retval = -EINVAL; 924bd238fb4SLatchesar Ionkov goto done; 9252bad8471SEric Van Hensbergen } 9262bad8471SEric Van Hensbergen 9272bad8471SEric Van Hensbergen /* copy extension buffer into buffer */ 928bd238fb4SLatchesar Ionkov if (st->extension.len < buflen) 929bd238fb4SLatchesar Ionkov buflen = st->extension.len + 1; 9302bad8471SEric Van Hensbergen 931bd238fb4SLatchesar Ionkov memmove(buffer, st->extension.str, buflen - 1); 932531b1094SLatchesar Ionkov buffer[buflen-1] = 0; 9332bad8471SEric Van Hensbergen 934bd238fb4SLatchesar Ionkov P9_DPRINTK(P9_DEBUG_VFS, 935bd238fb4SLatchesar Ionkov "%s -> %.*s (%s)\n", dentry->d_name.name, st->extension.len, 936bd238fb4SLatchesar Ionkov st->extension.str, buffer); 937bd238fb4SLatchesar Ionkov 9382bad8471SEric Van Hensbergen retval = buflen; 9392bad8471SEric Van Hensbergen 940bd238fb4SLatchesar Ionkov done: 941bd238fb4SLatchesar Ionkov kfree(st); 9422bad8471SEric Van Hensbergen return retval; 9432bad8471SEric Van Hensbergen } 9442bad8471SEric Van Hensbergen 9452bad8471SEric Van Hensbergen /** 9462bad8471SEric Van Hensbergen * v9fs_vfs_readlink - read a symlink's location 9472bad8471SEric Van Hensbergen * @dentry: dentry for symlink 948ee443996SEric Van Hensbergen * @buffer: buffer to load symlink location into 9492bad8471SEric Van Hensbergen * @buflen: length of buffer 9502bad8471SEric Van Hensbergen * 9512bad8471SEric Van Hensbergen */ 9522bad8471SEric Van Hensbergen 9532bad8471SEric Van Hensbergen static int v9fs_vfs_readlink(struct dentry *dentry, char __user * buffer, 9542bad8471SEric Van Hensbergen int buflen) 9552bad8471SEric Van Hensbergen { 9562bad8471SEric Van Hensbergen int retval; 9572bad8471SEric Van Hensbergen int ret; 9582bad8471SEric Van Hensbergen char *link = __getname(); 9592bad8471SEric Van Hensbergen 9600710d36aSFlorin Malita if (unlikely(!link)) 9610710d36aSFlorin Malita return -ENOMEM; 9620710d36aSFlorin Malita 963a1f9d8d2SLatchesar Ionkov if (buflen > PATH_MAX) 964a1f9d8d2SLatchesar Ionkov buflen = PATH_MAX; 9652bad8471SEric Van Hensbergen 966bd238fb4SLatchesar Ionkov P9_DPRINTK(P9_DEBUG_VFS, " dentry: %s (%p)\n", dentry->d_iname, dentry); 9672bad8471SEric Van Hensbergen 9682bad8471SEric Van Hensbergen retval = v9fs_readlink(dentry, link, buflen); 9692bad8471SEric Van Hensbergen 9702bad8471SEric Van Hensbergen if (retval > 0) { 9712bad8471SEric Van Hensbergen if ((ret = copy_to_user(buffer, link, retval)) != 0) { 972bd238fb4SLatchesar Ionkov P9_DPRINTK(P9_DEBUG_ERROR, 973bd238fb4SLatchesar Ionkov "problem copying to user: %d\n", ret); 9742bad8471SEric Van Hensbergen retval = ret; 9752bad8471SEric Van Hensbergen } 9762bad8471SEric Van Hensbergen } 9772bad8471SEric Van Hensbergen 978ce44eeb6SDavi Arnaut __putname(link); 9792bad8471SEric Van Hensbergen return retval; 9802bad8471SEric Van Hensbergen } 9812bad8471SEric Van Hensbergen 9822bad8471SEric Van Hensbergen /** 9832bad8471SEric Van Hensbergen * v9fs_vfs_follow_link - follow a symlink path 9842bad8471SEric Van Hensbergen * @dentry: dentry for symlink 9852bad8471SEric Van Hensbergen * @nd: nameidata 9862bad8471SEric Van Hensbergen * 9872bad8471SEric Van Hensbergen */ 9882bad8471SEric Van Hensbergen 9892bad8471SEric Van Hensbergen static void *v9fs_vfs_follow_link(struct dentry *dentry, struct nameidata *nd) 9902bad8471SEric Van Hensbergen { 9912bad8471SEric Van Hensbergen int len = 0; 9922bad8471SEric Van Hensbergen char *link = __getname(); 9932bad8471SEric Van Hensbergen 994bd238fb4SLatchesar Ionkov P9_DPRINTK(P9_DEBUG_VFS, "%s n", dentry->d_name.name); 9952bad8471SEric Van Hensbergen 9962bad8471SEric Van Hensbergen if (!link) 9972bad8471SEric Van Hensbergen link = ERR_PTR(-ENOMEM); 9982bad8471SEric Van Hensbergen else { 99916cce6d2SLatchesar Ionkov len = v9fs_readlink(dentry, link, PATH_MAX); 10002bad8471SEric Van Hensbergen 10012bad8471SEric Van Hensbergen if (len < 0) { 1002ce44eeb6SDavi Arnaut __putname(link); 10032bad8471SEric Van Hensbergen link = ERR_PTR(len); 10042bad8471SEric Van Hensbergen } else 10052bad8471SEric Van Hensbergen link[len] = 0; 10062bad8471SEric Van Hensbergen } 10072bad8471SEric Van Hensbergen nd_set_link(nd, link); 10082bad8471SEric Van Hensbergen 10092bad8471SEric Van Hensbergen return NULL; 10102bad8471SEric Van Hensbergen } 10112bad8471SEric Van Hensbergen 10122bad8471SEric Van Hensbergen /** 10132bad8471SEric Van Hensbergen * v9fs_vfs_put_link - release a symlink path 10142bad8471SEric Van Hensbergen * @dentry: dentry for symlink 10152bad8471SEric Van Hensbergen * @nd: nameidata 1016ee443996SEric Van Hensbergen * @p: unused 10172bad8471SEric Van Hensbergen * 10182bad8471SEric Van Hensbergen */ 10192bad8471SEric Van Hensbergen 1020ee443996SEric Van Hensbergen static void 1021ee443996SEric Van Hensbergen v9fs_vfs_put_link(struct dentry *dentry, struct nameidata *nd, void *p) 10222bad8471SEric Van Hensbergen { 10232bad8471SEric Van Hensbergen char *s = nd_get_link(nd); 10242bad8471SEric Van Hensbergen 1025bd238fb4SLatchesar Ionkov P9_DPRINTK(P9_DEBUG_VFS, " %s %s\n", dentry->d_name.name, s); 10262bad8471SEric Van Hensbergen if (!IS_ERR(s)) 1027ce44eeb6SDavi Arnaut __putname(s); 10282bad8471SEric Van Hensbergen } 10292bad8471SEric Van Hensbergen 1030ee443996SEric Van Hensbergen /** 1031ee443996SEric Van Hensbergen * v9fs_vfs_mkspecial - create a special file 1032ee443996SEric Van Hensbergen * @dir: inode to create special file in 1033ee443996SEric Van Hensbergen * @dentry: dentry to create 1034ee443996SEric Van Hensbergen * @mode: mode to create special file 1035ee443996SEric Van Hensbergen * @extension: 9p2000.u format extension string representing special file 1036ee443996SEric Van Hensbergen * 1037ee443996SEric Van Hensbergen */ 1038ee443996SEric Van Hensbergen 1039531b1094SLatchesar Ionkov static int v9fs_vfs_mkspecial(struct inode *dir, struct dentry *dentry, 1040531b1094SLatchesar Ionkov int mode, const char *extension) 1041531b1094SLatchesar Ionkov { 1042bd238fb4SLatchesar Ionkov u32 perm; 1043531b1094SLatchesar Ionkov struct v9fs_session_info *v9ses; 1044bd238fb4SLatchesar Ionkov struct p9_fid *fid; 1045531b1094SLatchesar Ionkov 10466a3124a3SLatchesar Ionkov v9ses = v9fs_inode2v9ses(dir); 10472405669bSLatchesar Ionkov if (!v9fs_extended(v9ses)) { 1048bd238fb4SLatchesar Ionkov P9_DPRINTK(P9_DEBUG_ERROR, "not extended\n"); 10496a3124a3SLatchesar Ionkov return -EPERM; 1050531b1094SLatchesar Ionkov } 1051531b1094SLatchesar Ionkov 1052da977b2cSEric Van Hensbergen perm = unixmode2p9mode(v9ses, mode); 1053bd238fb4SLatchesar Ionkov fid = v9fs_create(v9ses, dir, dentry, (char *) extension, perm, 1054bd238fb4SLatchesar Ionkov P9_OREAD); 1055bd238fb4SLatchesar Ionkov if (IS_ERR(fid)) 1056bd238fb4SLatchesar Ionkov return PTR_ERR(fid); 1057da977b2cSEric Van Hensbergen 1058bd238fb4SLatchesar Ionkov p9_client_clunk(fid); 10596a3124a3SLatchesar Ionkov return 0; 1060531b1094SLatchesar Ionkov } 1061531b1094SLatchesar Ionkov 1062531b1094SLatchesar Ionkov /** 1063531b1094SLatchesar Ionkov * v9fs_vfs_symlink - helper function to create symlinks 1064531b1094SLatchesar Ionkov * @dir: directory inode containing symlink 1065531b1094SLatchesar Ionkov * @dentry: dentry for symlink 1066531b1094SLatchesar Ionkov * @symname: symlink data 1067531b1094SLatchesar Ionkov * 1068ee443996SEric Van Hensbergen * See Also: 9P2000.u RFC for more information 1069531b1094SLatchesar Ionkov * 1070531b1094SLatchesar Ionkov */ 1071531b1094SLatchesar Ionkov 1072531b1094SLatchesar Ionkov static int 1073531b1094SLatchesar Ionkov v9fs_vfs_symlink(struct inode *dir, struct dentry *dentry, const char *symname) 1074531b1094SLatchesar Ionkov { 1075bd238fb4SLatchesar Ionkov P9_DPRINTK(P9_DEBUG_VFS, " %lu,%s,%s\n", dir->i_ino, 1076bd238fb4SLatchesar Ionkov dentry->d_name.name, symname); 1077531b1094SLatchesar Ionkov 1078531b1094SLatchesar Ionkov return v9fs_vfs_mkspecial(dir, dentry, S_IFLNK, symname); 1079531b1094SLatchesar Ionkov } 1080531b1094SLatchesar Ionkov 10812bad8471SEric Van Hensbergen /** 10822bad8471SEric Van Hensbergen * v9fs_vfs_link - create a hardlink 10832bad8471SEric Van Hensbergen * @old_dentry: dentry for file to link to 10842bad8471SEric Van Hensbergen * @dir: inode destination for new link 108573c592b9SEric Van Hensbergen * @dentry: dentry for link 10862bad8471SEric Van Hensbergen * 10872bad8471SEric Van Hensbergen */ 10882bad8471SEric Van Hensbergen 10892bad8471SEric Van Hensbergen static int 10902bad8471SEric Van Hensbergen v9fs_vfs_link(struct dentry *old_dentry, struct inode *dir, 10912bad8471SEric Van Hensbergen struct dentry *dentry) 10922bad8471SEric Van Hensbergen { 1093531b1094SLatchesar Ionkov int retval; 1094bd238fb4SLatchesar Ionkov struct p9_fid *oldfid; 1095531b1094SLatchesar Ionkov char *name; 10962bad8471SEric Van Hensbergen 1097bd238fb4SLatchesar Ionkov P9_DPRINTK(P9_DEBUG_VFS, 1098bd238fb4SLatchesar Ionkov " %lu,%s,%s\n", dir->i_ino, dentry->d_name.name, 10992bad8471SEric Van Hensbergen old_dentry->d_name.name); 11002bad8471SEric Van Hensbergen 1101da977b2cSEric Van Hensbergen oldfid = v9fs_fid_clone(old_dentry); 1102da977b2cSEric Van Hensbergen if (IS_ERR(oldfid)) 1103da977b2cSEric Van Hensbergen return PTR_ERR(oldfid); 11042bad8471SEric Van Hensbergen 1105531b1094SLatchesar Ionkov name = __getname(); 1106da977b2cSEric Van Hensbergen if (unlikely(!name)) { 1107da977b2cSEric Van Hensbergen retval = -ENOMEM; 1108da977b2cSEric Van Hensbergen goto clunk_fid; 1109da977b2cSEric Van Hensbergen } 11100710d36aSFlorin Malita 111116cce6d2SLatchesar Ionkov sprintf(name, "%d\n", oldfid->fid); 1112bd238fb4SLatchesar Ionkov retval = v9fs_vfs_mkspecial(dir, dentry, P9_DMLINK, name); 1113531b1094SLatchesar Ionkov __putname(name); 11142bad8471SEric Van Hensbergen 1115da977b2cSEric Van Hensbergen clunk_fid: 1116bd238fb4SLatchesar Ionkov p9_client_clunk(oldfid); 11172bad8471SEric Van Hensbergen return retval; 11182bad8471SEric Van Hensbergen } 11192bad8471SEric Van Hensbergen 11202bad8471SEric Van Hensbergen /** 11212bad8471SEric Van Hensbergen * v9fs_vfs_mknod - create a special file 11222bad8471SEric Van Hensbergen * @dir: inode destination for new link 11232bad8471SEric Van Hensbergen * @dentry: dentry for file 11242bad8471SEric Van Hensbergen * @mode: mode for creation 1125ee443996SEric Van Hensbergen * @rdev: device associated with special file 11262bad8471SEric Van Hensbergen * 11272bad8471SEric Van Hensbergen */ 11282bad8471SEric Van Hensbergen 11292bad8471SEric Van Hensbergen static int 11302bad8471SEric Van Hensbergen v9fs_vfs_mknod(struct inode *dir, struct dentry *dentry, int mode, dev_t rdev) 11312bad8471SEric Van Hensbergen { 1132531b1094SLatchesar Ionkov int retval; 1133531b1094SLatchesar Ionkov char *name; 11342bad8471SEric Van Hensbergen 1135bd238fb4SLatchesar Ionkov P9_DPRINTK(P9_DEBUG_VFS, 1136bd238fb4SLatchesar Ionkov " %lu,%s mode: %x MAJOR: %u MINOR: %u\n", dir->i_ino, 11372bad8471SEric Van Hensbergen dentry->d_name.name, mode, MAJOR(rdev), MINOR(rdev)); 11382bad8471SEric Van Hensbergen 1139531b1094SLatchesar Ionkov if (!new_valid_dev(rdev)) 1140531b1094SLatchesar Ionkov return -EINVAL; 114173c592b9SEric Van Hensbergen 1142531b1094SLatchesar Ionkov name = __getname(); 1143c0291a05SEugene Teo if (!name) 1144c0291a05SEugene Teo return -ENOMEM; 11452bad8471SEric Van Hensbergen /* build extension */ 11462bad8471SEric Van Hensbergen if (S_ISBLK(mode)) 1147531b1094SLatchesar Ionkov sprintf(name, "b %u %u", MAJOR(rdev), MINOR(rdev)); 11482bad8471SEric Van Hensbergen else if (S_ISCHR(mode)) 1149531b1094SLatchesar Ionkov sprintf(name, "c %u %u", MAJOR(rdev), MINOR(rdev)); 115073c592b9SEric Van Hensbergen else if (S_ISFIFO(mode)) 1151531b1094SLatchesar Ionkov *name = 0; 11522bad8471SEric Van Hensbergen else { 1153531b1094SLatchesar Ionkov __putname(name); 1154531b1094SLatchesar Ionkov return -EINVAL; 11552bad8471SEric Van Hensbergen } 11562bad8471SEric Van Hensbergen 1157531b1094SLatchesar Ionkov retval = v9fs_vfs_mkspecial(dir, dentry, mode, name); 1158531b1094SLatchesar Ionkov __putname(name); 11592bad8471SEric Van Hensbergen 11602bad8471SEric Van Hensbergen return retval; 11612bad8471SEric Van Hensbergen } 11622bad8471SEric Van Hensbergen 1163754661f1SArjan van de Ven static const struct inode_operations v9fs_dir_inode_operations_ext = { 11642bad8471SEric Van Hensbergen .create = v9fs_vfs_create, 11652bad8471SEric Van Hensbergen .lookup = v9fs_vfs_lookup, 11662bad8471SEric Van Hensbergen .symlink = v9fs_vfs_symlink, 11672bad8471SEric Van Hensbergen .link = v9fs_vfs_link, 11682bad8471SEric Van Hensbergen .unlink = v9fs_vfs_unlink, 11692bad8471SEric Van Hensbergen .mkdir = v9fs_vfs_mkdir, 11702bad8471SEric Van Hensbergen .rmdir = v9fs_vfs_rmdir, 11712bad8471SEric Van Hensbergen .mknod = v9fs_vfs_mknod, 11722bad8471SEric Van Hensbergen .rename = v9fs_vfs_rename, 11732bad8471SEric Van Hensbergen .readlink = v9fs_vfs_readlink, 11742bad8471SEric Van Hensbergen .getattr = v9fs_vfs_getattr, 11752bad8471SEric Van Hensbergen .setattr = v9fs_vfs_setattr, 11762bad8471SEric Van Hensbergen }; 11772bad8471SEric Van Hensbergen 1178754661f1SArjan van de Ven static const struct inode_operations v9fs_dir_inode_operations = { 1179b501611aSEric Van Hensbergen .create = v9fs_vfs_create, 1180b501611aSEric Van Hensbergen .lookup = v9fs_vfs_lookup, 1181b501611aSEric Van Hensbergen .unlink = v9fs_vfs_unlink, 1182b501611aSEric Van Hensbergen .mkdir = v9fs_vfs_mkdir, 1183b501611aSEric Van Hensbergen .rmdir = v9fs_vfs_rmdir, 1184b501611aSEric Van Hensbergen .mknod = v9fs_vfs_mknod, 1185b501611aSEric Van Hensbergen .rename = v9fs_vfs_rename, 1186b501611aSEric Van Hensbergen .getattr = v9fs_vfs_getattr, 1187b501611aSEric Van Hensbergen .setattr = v9fs_vfs_setattr, 1188b501611aSEric Van Hensbergen }; 1189b501611aSEric Van Hensbergen 1190754661f1SArjan van de Ven static const struct inode_operations v9fs_file_inode_operations = { 11912bad8471SEric Van Hensbergen .getattr = v9fs_vfs_getattr, 11922bad8471SEric Van Hensbergen .setattr = v9fs_vfs_setattr, 11932bad8471SEric Van Hensbergen }; 11942bad8471SEric Van Hensbergen 1195754661f1SArjan van de Ven static const struct inode_operations v9fs_symlink_inode_operations = { 11962bad8471SEric Van Hensbergen .readlink = v9fs_vfs_readlink, 11972bad8471SEric Van Hensbergen .follow_link = v9fs_vfs_follow_link, 11982bad8471SEric Van Hensbergen .put_link = v9fs_vfs_put_link, 11992bad8471SEric Van Hensbergen .getattr = v9fs_vfs_getattr, 12002bad8471SEric Van Hensbergen .setattr = v9fs_vfs_setattr, 12012bad8471SEric Van Hensbergen }; 1202