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 1352e4bef41SEric Van Hensbergen * @extended: if .u extensions are active 136ee443996SEric Van Hensbergen */ 137ee443996SEric Van Hensbergen 1382e4bef41SEric Van Hensbergen int v9fs_uflags2omode(int uflags, int extended) 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_TRUNC) 159bd238fb4SLatchesar Ionkov ret |= P9_OTRUNC; 1606a3124a3SLatchesar Ionkov 1612e4bef41SEric Van Hensbergen if (extended) { 1622e4bef41SEric Van Hensbergen if (uflags & O_EXCL) 1632e4bef41SEric Van Hensbergen ret |= P9_OEXCL; 1642e4bef41SEric Van Hensbergen 1656a3124a3SLatchesar Ionkov if (uflags & O_APPEND) 166bd238fb4SLatchesar Ionkov ret |= P9_OAPPEND; 1672e4bef41SEric Van Hensbergen } 1686a3124a3SLatchesar Ionkov 1696a3124a3SLatchesar Ionkov return ret; 1706a3124a3SLatchesar Ionkov } 1716a3124a3SLatchesar Ionkov 1722bad8471SEric Van Hensbergen /** 173531b1094SLatchesar Ionkov * v9fs_blank_wstat - helper function to setup a 9P stat structure 174531b1094SLatchesar Ionkov * @wstat: structure to initialize 1752bad8471SEric Van Hensbergen * 1762bad8471SEric Van Hensbergen */ 1772bad8471SEric Van Hensbergen 17873c592b9SEric Van Hensbergen static void 179bd238fb4SLatchesar Ionkov v9fs_blank_wstat(struct p9_wstat *wstat) 1802bad8471SEric Van Hensbergen { 181531b1094SLatchesar Ionkov wstat->type = ~0; 182531b1094SLatchesar Ionkov wstat->dev = ~0; 183531b1094SLatchesar Ionkov wstat->qid.type = ~0; 184531b1094SLatchesar Ionkov wstat->qid.version = ~0; 185531b1094SLatchesar Ionkov *((long long *)&wstat->qid.path) = ~0; 186531b1094SLatchesar Ionkov wstat->mode = ~0; 187531b1094SLatchesar Ionkov wstat->atime = ~0; 188531b1094SLatchesar Ionkov wstat->mtime = ~0; 189531b1094SLatchesar Ionkov wstat->length = ~0; 190531b1094SLatchesar Ionkov wstat->name = NULL; 191531b1094SLatchesar Ionkov wstat->uid = NULL; 192531b1094SLatchesar Ionkov wstat->gid = NULL; 193531b1094SLatchesar Ionkov wstat->muid = NULL; 194531b1094SLatchesar Ionkov wstat->n_uid = ~0; 195531b1094SLatchesar Ionkov wstat->n_gid = ~0; 196531b1094SLatchesar Ionkov wstat->n_muid = ~0; 197531b1094SLatchesar Ionkov wstat->extension = NULL; 1982bad8471SEric Van Hensbergen } 1992bad8471SEric Van Hensbergen 2002bad8471SEric Van Hensbergen /** 2012bad8471SEric Van Hensbergen * v9fs_get_inode - helper function to setup an inode 2022bad8471SEric Van Hensbergen * @sb: superblock 2032bad8471SEric Van Hensbergen * @mode: mode to setup inode with 2042bad8471SEric Van Hensbergen * 2052bad8471SEric Van Hensbergen */ 2062bad8471SEric Van Hensbergen 2072bad8471SEric Van Hensbergen struct inode *v9fs_get_inode(struct super_block *sb, int mode) 2082bad8471SEric Van Hensbergen { 2092bb54115SAbhishek Kulkarni int err; 2106a3124a3SLatchesar Ionkov struct inode *inode; 211b501611aSEric Van Hensbergen struct v9fs_session_info *v9ses = sb->s_fs_info; 2122bad8471SEric Van Hensbergen 213bd238fb4SLatchesar Ionkov P9_DPRINTK(P9_DEBUG_VFS, "super block: %p mode: %o\n", sb, mode); 2142bad8471SEric Van Hensbergen 2152bad8471SEric Van Hensbergen inode = new_inode(sb); 2162bb54115SAbhishek Kulkarni if (!inode) { 2172bb54115SAbhishek Kulkarni P9_EPRINTK(KERN_WARNING, "Problem allocating inode\n"); 2182bb54115SAbhishek Kulkarni return -ENOMEM; 2192bb54115SAbhishek Kulkarni } 2202bb54115SAbhishek Kulkarni 2212bad8471SEric Van Hensbergen inode->i_mode = mode; 222f8b9d53aSDavid Howells inode->i_uid = current_fsuid(); 223f8b9d53aSDavid Howells inode->i_gid = current_fsgid(); 2242bad8471SEric Van Hensbergen inode->i_blocks = 0; 2252bad8471SEric Van Hensbergen inode->i_rdev = 0; 2262bad8471SEric Van Hensbergen inode->i_atime = inode->i_mtime = inode->i_ctime = CURRENT_TIME; 227147b31cfSEric Van Hensbergen inode->i_mapping->a_ops = &v9fs_addr_operations; 2282bad8471SEric Van Hensbergen 2292bad8471SEric Van Hensbergen switch (mode & S_IFMT) { 2302bad8471SEric Van Hensbergen case S_IFIFO: 2312bad8471SEric Van Hensbergen case S_IFBLK: 2322bad8471SEric Van Hensbergen case S_IFCHR: 2332bad8471SEric Van Hensbergen case S_IFSOCK: 2342405669bSLatchesar Ionkov if (!v9fs_extended(v9ses)) { 235bd238fb4SLatchesar Ionkov P9_DPRINTK(P9_DEBUG_ERROR, 236bd238fb4SLatchesar Ionkov "special files without extended mode\n"); 2372bb54115SAbhishek Kulkarni err = -EINVAL; 2382bb54115SAbhishek Kulkarni goto error; 239b501611aSEric Van Hensbergen } 2402bb54115SAbhishek Kulkarni init_special_inode(inode, inode->i_mode, inode->i_rdev); 2415d58bec5SEric Van Hensbergen break; 2422bad8471SEric Van Hensbergen case S_IFREG: 2432bad8471SEric Van Hensbergen inode->i_op = &v9fs_file_inode_operations; 2442bad8471SEric Van Hensbergen inode->i_fop = &v9fs_file_operations; 2452bad8471SEric Van Hensbergen break; 246b501611aSEric Van Hensbergen case S_IFLNK: 2472405669bSLatchesar Ionkov if (!v9fs_extended(v9ses)) { 248bd238fb4SLatchesar Ionkov P9_DPRINTK(P9_DEBUG_ERROR, 249bd238fb4SLatchesar Ionkov "extended modes used w/o 9P2000.u\n"); 2502bb54115SAbhishek Kulkarni err = -EINVAL; 2512bb54115SAbhishek Kulkarni goto error; 252b501611aSEric Van Hensbergen } 253b501611aSEric Van Hensbergen inode->i_op = &v9fs_symlink_inode_operations; 254b501611aSEric Van Hensbergen break; 2552bad8471SEric Van Hensbergen case S_IFDIR: 256d8c76e6fSDave Hansen inc_nlink(inode); 2572405669bSLatchesar Ionkov if (v9fs_extended(v9ses)) 258b501611aSEric Van Hensbergen inode->i_op = &v9fs_dir_inode_operations_ext; 259b501611aSEric Van Hensbergen else 2602bad8471SEric Van Hensbergen inode->i_op = &v9fs_dir_inode_operations; 2612bad8471SEric Van Hensbergen inode->i_fop = &v9fs_dir_operations; 2622bad8471SEric Van Hensbergen break; 2632bad8471SEric Van Hensbergen default: 2642bb54115SAbhishek Kulkarni P9_DPRINTK(P9_DEBUG_ERROR, "BAD mode 0x%x S_IFMT 0x%x\n", 2652bad8471SEric Van Hensbergen mode, mode & S_IFMT); 2662bb54115SAbhishek Kulkarni err = -EINVAL; 2672bb54115SAbhishek Kulkarni goto error; 2682bad8471SEric Van Hensbergen } 2692bb54115SAbhishek Kulkarni 2702bad8471SEric Van Hensbergen return inode; 2712bb54115SAbhishek Kulkarni 2722bb54115SAbhishek Kulkarni error: 2732bb54115SAbhishek Kulkarni iput(inode); 2742bb54115SAbhishek Kulkarni return ERR_PTR(err); 2752bad8471SEric Van Hensbergen } 2762bad8471SEric Van Hensbergen 277bd238fb4SLatchesar Ionkov /* 2786a3124a3SLatchesar Ionkov static struct v9fs_fid* 2796a3124a3SLatchesar Ionkov v9fs_clone_walk(struct v9fs_session_info *v9ses, u32 fid, struct dentry *dentry) 2806a3124a3SLatchesar Ionkov { 2816a3124a3SLatchesar Ionkov int err; 282736c4b85SMika Kukkonen int nfid; 2836a3124a3SLatchesar Ionkov struct v9fs_fid *ret; 2846a3124a3SLatchesar Ionkov struct v9fs_fcall *fcall; 2850b8dd177SLatchesar Ionkov 2866a3124a3SLatchesar Ionkov nfid = v9fs_get_idpool(&v9ses->fidpool); 2876a3124a3SLatchesar Ionkov if (nfid < 0) { 2880b8dd177SLatchesar Ionkov eprintk(KERN_WARNING, "no free fids available\n"); 289731805b4SLatchesar Ionkov return ERR_PTR(-ENOSPC); 2900b8dd177SLatchesar Ionkov } 2910b8dd177SLatchesar Ionkov 2926a3124a3SLatchesar Ionkov err = v9fs_t_walk(v9ses, fid, nfid, (char *) dentry->d_name.name, 2936a3124a3SLatchesar Ionkov &fcall); 2946a3124a3SLatchesar Ionkov 2956a3124a3SLatchesar Ionkov if (err < 0) { 29641e5a6acSLatchesar Ionkov if (fcall && fcall->id == RWALK) 29741e5a6acSLatchesar Ionkov goto clunk_fid; 29841e5a6acSLatchesar Ionkov 2996a3124a3SLatchesar Ionkov PRINT_FCALL_ERROR("walk error", fcall); 3006a3124a3SLatchesar Ionkov v9fs_put_idpool(nfid, &v9ses->fidpool); 3016a3124a3SLatchesar Ionkov goto error; 3020b8dd177SLatchesar Ionkov } 3036a3124a3SLatchesar Ionkov 3043cf6429aSLatchesar Ionkov kfree(fcall); 3053cf6429aSLatchesar Ionkov fcall = NULL; 3066a3124a3SLatchesar Ionkov ret = v9fs_fid_create(v9ses, nfid); 3076a3124a3SLatchesar Ionkov if (!ret) { 3086a3124a3SLatchesar Ionkov err = -ENOMEM; 3096a3124a3SLatchesar Ionkov goto clunk_fid; 3100b8dd177SLatchesar Ionkov } 3112bad8471SEric Van Hensbergen 3126a3124a3SLatchesar Ionkov err = v9fs_fid_insert(ret, dentry); 3136a3124a3SLatchesar Ionkov if (err < 0) { 3146a3124a3SLatchesar Ionkov v9fs_fid_destroy(ret); 3156a3124a3SLatchesar Ionkov goto clunk_fid; 3166a3124a3SLatchesar Ionkov } 3172bad8471SEric Van Hensbergen 3186a3124a3SLatchesar Ionkov return ret; 3196a3124a3SLatchesar Ionkov 3206a3124a3SLatchesar Ionkov clunk_fid: 3216a3124a3SLatchesar Ionkov v9fs_t_clunk(v9ses, nfid); 3226a3124a3SLatchesar Ionkov 3236a3124a3SLatchesar Ionkov error: 3246a3124a3SLatchesar Ionkov kfree(fcall); 3256a3124a3SLatchesar Ionkov return ERR_PTR(err); 3266a3124a3SLatchesar Ionkov } 327bd238fb4SLatchesar Ionkov */ 3286a3124a3SLatchesar Ionkov 329ee443996SEric Van Hensbergen /** 330ee443996SEric Van Hensbergen * v9fs_inode_from_fid - populate an inode by issuing a attribute request 331ee443996SEric Van Hensbergen * @v9ses: session information 332ee443996SEric Van Hensbergen * @fid: fid to issue attribute request for 333ee443996SEric Van Hensbergen * @sb: superblock on which to create inode 334ee443996SEric Van Hensbergen * 335ee443996SEric Van Hensbergen */ 336ee443996SEric Van Hensbergen 3375174fdabSLatchesar Ionkov static struct inode * 338bd238fb4SLatchesar Ionkov v9fs_inode_from_fid(struct v9fs_session_info *v9ses, struct p9_fid *fid, 3396a3124a3SLatchesar Ionkov struct super_block *sb) 3406a3124a3SLatchesar Ionkov { 3416a3124a3SLatchesar Ionkov int err, umode; 3426a3124a3SLatchesar Ionkov struct inode *ret; 34351a87c55SEric Van Hensbergen struct p9_wstat *st; 3446a3124a3SLatchesar Ionkov 3456a3124a3SLatchesar Ionkov ret = NULL; 346bd238fb4SLatchesar Ionkov st = p9_client_stat(fid); 347bd238fb4SLatchesar Ionkov if (IS_ERR(st)) { 348bd238fb4SLatchesar Ionkov err = PTR_ERR(st); 349bd238fb4SLatchesar Ionkov st = NULL; 3506a3124a3SLatchesar Ionkov goto error; 3512bad8471SEric Van Hensbergen } 3522bad8471SEric Van Hensbergen 353bd238fb4SLatchesar Ionkov umode = p9mode2unixmode(v9ses, st->mode); 3546a3124a3SLatchesar Ionkov ret = v9fs_get_inode(sb, umode); 3556a3124a3SLatchesar Ionkov if (IS_ERR(ret)) { 3566a3124a3SLatchesar Ionkov err = PTR_ERR(ret); 3576a3124a3SLatchesar Ionkov ret = NULL; 3586a3124a3SLatchesar Ionkov goto error; 3592bad8471SEric Van Hensbergen } 3602bad8471SEric Van Hensbergen 361bd238fb4SLatchesar Ionkov v9fs_stat2inode(st, ret, sb); 362bd238fb4SLatchesar Ionkov ret->i_ino = v9fs_qid2ino(&st->qid); 363bd238fb4SLatchesar Ionkov kfree(st); 3646a3124a3SLatchesar Ionkov return ret; 3652bad8471SEric Van Hensbergen 3666a3124a3SLatchesar Ionkov error: 367bd238fb4SLatchesar Ionkov kfree(st); 3686a3124a3SLatchesar Ionkov if (ret) 3696a3124a3SLatchesar Ionkov iput(ret); 3702bad8471SEric Van Hensbergen 3716a3124a3SLatchesar Ionkov return ERR_PTR(err); 3722bad8471SEric Van Hensbergen } 3732bad8471SEric Van Hensbergen 3742bad8471SEric Van Hensbergen /** 3752bad8471SEric Van Hensbergen * v9fs_remove - helper function to remove files and directories 37673c592b9SEric Van Hensbergen * @dir: directory inode that is being deleted 37773c592b9SEric Van Hensbergen * @file: dentry that is being deleted 37873c592b9SEric Van Hensbergen * @rmdir: removing a directory 3792bad8471SEric Van Hensbergen * 3802bad8471SEric Van Hensbergen */ 3812bad8471SEric Van Hensbergen 3822bad8471SEric Van Hensbergen static int v9fs_remove(struct inode *dir, struct dentry *file, int rmdir) 3832bad8471SEric Van Hensbergen { 384bd238fb4SLatchesar Ionkov struct inode *file_inode; 385bd238fb4SLatchesar Ionkov struct v9fs_session_info *v9ses; 386bd238fb4SLatchesar Ionkov struct p9_fid *v9fid; 3872bad8471SEric Van Hensbergen 388bd238fb4SLatchesar Ionkov P9_DPRINTK(P9_DEBUG_VFS, "inode: %p dentry: %p rmdir: %d\n", dir, file, 3892bad8471SEric Van Hensbergen rmdir); 3902bad8471SEric Van Hensbergen 3912bad8471SEric Van Hensbergen file_inode = file->d_inode; 3922bad8471SEric Van Hensbergen v9ses = v9fs_inode2v9ses(file_inode); 393c959df9fSLatchesar Ionkov v9fid = v9fs_fid_clone(file); 394da977b2cSEric Van Hensbergen if (IS_ERR(v9fid)) 395da977b2cSEric Van Hensbergen return PTR_ERR(v9fid); 3962bad8471SEric Van Hensbergen 397bd238fb4SLatchesar Ionkov return p9_client_remove(v9fid); 3982bad8471SEric Van Hensbergen } 3992bad8471SEric Van Hensbergen 4006a3124a3SLatchesar Ionkov static int 4016a3124a3SLatchesar Ionkov v9fs_open_created(struct inode *inode, struct file *file) 4026a3124a3SLatchesar Ionkov { 4036a3124a3SLatchesar Ionkov return 0; 4046a3124a3SLatchesar Ionkov } 4056a3124a3SLatchesar Ionkov 406bd238fb4SLatchesar Ionkov 407bd238fb4SLatchesar Ionkov /** 408bd238fb4SLatchesar Ionkov * v9fs_create - Create a file 409ee443996SEric Van Hensbergen * @v9ses: session information 410ee443996SEric Van Hensbergen * @dir: directory that dentry is being created in 411bd238fb4SLatchesar Ionkov * @dentry: dentry that is being created 4120e15597eSAbhishek Kulkarni * @extension: 9p2000.u extension string to support devices, etc. 413bd238fb4SLatchesar Ionkov * @perm: create permissions 414bd238fb4SLatchesar Ionkov * @mode: open mode 415bd238fb4SLatchesar Ionkov * 416bd238fb4SLatchesar Ionkov */ 417bd238fb4SLatchesar Ionkov static struct p9_fid * 418bd238fb4SLatchesar Ionkov v9fs_create(struct v9fs_session_info *v9ses, struct inode *dir, 419bd238fb4SLatchesar Ionkov struct dentry *dentry, char *extension, u32 perm, u8 mode) 420bd238fb4SLatchesar Ionkov { 421bd238fb4SLatchesar Ionkov int err; 422bd238fb4SLatchesar Ionkov char *name; 423bd238fb4SLatchesar Ionkov struct p9_fid *dfid, *ofid, *fid; 424bd238fb4SLatchesar Ionkov struct inode *inode; 425bd238fb4SLatchesar Ionkov 42651a87c55SEric Van Hensbergen P9_DPRINTK(P9_DEBUG_VFS, "name %s\n", dentry->d_name.name); 42751a87c55SEric Van Hensbergen 428bd238fb4SLatchesar Ionkov err = 0; 429bd238fb4SLatchesar Ionkov ofid = NULL; 430bd238fb4SLatchesar Ionkov fid = NULL; 431bd238fb4SLatchesar Ionkov name = (char *) dentry->d_name.name; 432bd238fb4SLatchesar Ionkov dfid = v9fs_fid_clone(dentry->d_parent); 433bd238fb4SLatchesar Ionkov if (IS_ERR(dfid)) { 434bd238fb4SLatchesar Ionkov err = PTR_ERR(dfid); 43551a87c55SEric Van Hensbergen P9_DPRINTK(P9_DEBUG_VFS, "fid clone failed %d\n", err); 436bd238fb4SLatchesar Ionkov dfid = NULL; 437bd238fb4SLatchesar Ionkov goto error; 438bd238fb4SLatchesar Ionkov } 439bd238fb4SLatchesar Ionkov 440bd238fb4SLatchesar Ionkov /* clone a fid to use for creation */ 441bd238fb4SLatchesar Ionkov ofid = p9_client_walk(dfid, 0, NULL, 1); 442bd238fb4SLatchesar Ionkov if (IS_ERR(ofid)) { 443bd238fb4SLatchesar Ionkov err = PTR_ERR(ofid); 44451a87c55SEric Van Hensbergen P9_DPRINTK(P9_DEBUG_VFS, "p9_client_walk failed %d\n", err); 445bd238fb4SLatchesar Ionkov ofid = NULL; 446bd238fb4SLatchesar Ionkov goto error; 447bd238fb4SLatchesar Ionkov } 448bd238fb4SLatchesar Ionkov 449bd238fb4SLatchesar Ionkov err = p9_client_fcreate(ofid, name, perm, mode, extension); 45051a87c55SEric Van Hensbergen if (err < 0) { 45151a87c55SEric Van Hensbergen P9_DPRINTK(P9_DEBUG_VFS, "p9_client_fcreate failed %d\n", err); 452bd238fb4SLatchesar Ionkov goto error; 45351a87c55SEric Van Hensbergen } 454bd238fb4SLatchesar Ionkov 455bd238fb4SLatchesar Ionkov /* now walk from the parent so we can get unopened fid */ 456bd238fb4SLatchesar Ionkov fid = p9_client_walk(dfid, 1, &name, 0); 457bd238fb4SLatchesar Ionkov if (IS_ERR(fid)) { 458bd238fb4SLatchesar Ionkov err = PTR_ERR(fid); 45951a87c55SEric Van Hensbergen P9_DPRINTK(P9_DEBUG_VFS, "p9_client_walk failed %d\n", err); 460bd238fb4SLatchesar Ionkov fid = NULL; 461bd238fb4SLatchesar Ionkov goto error; 462bd238fb4SLatchesar Ionkov } else 463bd238fb4SLatchesar Ionkov dfid = NULL; 464bd238fb4SLatchesar Ionkov 465bd238fb4SLatchesar Ionkov /* instantiate inode and assign the unopened fid to the dentry */ 466bd238fb4SLatchesar Ionkov inode = v9fs_inode_from_fid(v9ses, fid, dir->i_sb); 467bd238fb4SLatchesar Ionkov if (IS_ERR(inode)) { 468bd238fb4SLatchesar Ionkov err = PTR_ERR(inode); 46951a87c55SEric Van Hensbergen P9_DPRINTK(P9_DEBUG_VFS, "inode creation failed %d\n", err); 470bd238fb4SLatchesar Ionkov goto error; 471bd238fb4SLatchesar Ionkov } 472bd238fb4SLatchesar Ionkov 473bd238fb4SLatchesar Ionkov if (v9ses->cache) 474bd238fb4SLatchesar Ionkov dentry->d_op = &v9fs_cached_dentry_operations; 475bd238fb4SLatchesar Ionkov else 476bd238fb4SLatchesar Ionkov dentry->d_op = &v9fs_dentry_operations; 477bd238fb4SLatchesar Ionkov 478bd238fb4SLatchesar Ionkov d_instantiate(dentry, inode); 47950fb6d2bSAbhishek Kulkarni err = v9fs_fid_add(dentry, fid); 48050fb6d2bSAbhishek Kulkarni if (err < 0) 48150fb6d2bSAbhishek Kulkarni goto error; 48250fb6d2bSAbhishek Kulkarni 483bd238fb4SLatchesar Ionkov return ofid; 484bd238fb4SLatchesar Ionkov 485bd238fb4SLatchesar Ionkov error: 486bd238fb4SLatchesar Ionkov if (dfid) 487bd238fb4SLatchesar Ionkov p9_client_clunk(dfid); 488bd238fb4SLatchesar Ionkov 489bd238fb4SLatchesar Ionkov if (ofid) 490bd238fb4SLatchesar Ionkov p9_client_clunk(ofid); 491bd238fb4SLatchesar Ionkov 492bd238fb4SLatchesar Ionkov if (fid) 493bd238fb4SLatchesar Ionkov p9_client_clunk(fid); 494bd238fb4SLatchesar Ionkov 495bd238fb4SLatchesar Ionkov return ERR_PTR(err); 496bd238fb4SLatchesar Ionkov } 497bd238fb4SLatchesar Ionkov 4982bad8471SEric Van Hensbergen /** 4992bad8471SEric Van Hensbergen * v9fs_vfs_create - VFS hook to create files 500ee443996SEric Van Hensbergen * @dir: directory inode that is being created 5012bad8471SEric Van Hensbergen * @dentry: dentry that is being deleted 5026a3124a3SLatchesar Ionkov * @mode: create permissions 5032bad8471SEric Van Hensbergen * @nd: path information 5042bad8471SEric Van Hensbergen * 5052bad8471SEric Van Hensbergen */ 5062bad8471SEric Van Hensbergen 5072bad8471SEric Van Hensbergen static int 5086a3124a3SLatchesar Ionkov v9fs_vfs_create(struct inode *dir, struct dentry *dentry, int mode, 5092bad8471SEric Van Hensbergen struct nameidata *nd) 5102bad8471SEric Van Hensbergen { 5116a3124a3SLatchesar Ionkov int err; 512bd238fb4SLatchesar Ionkov u32 perm; 5136a3124a3SLatchesar Ionkov int flags; 5146a3124a3SLatchesar Ionkov struct v9fs_session_info *v9ses; 515bd238fb4SLatchesar Ionkov struct p9_fid *fid; 5166a3124a3SLatchesar Ionkov struct file *filp; 5176a3124a3SLatchesar Ionkov 518bd238fb4SLatchesar Ionkov err = 0; 519bd238fb4SLatchesar Ionkov fid = NULL; 5206a3124a3SLatchesar Ionkov v9ses = v9fs_inode2v9ses(dir); 521da977b2cSEric Van Hensbergen perm = unixmode2p9mode(v9ses, mode); 5226a3124a3SLatchesar Ionkov if (nd && nd->flags & LOOKUP_OPEN) 5236a3124a3SLatchesar Ionkov flags = nd->intent.open.flags - 1; 5246a3124a3SLatchesar Ionkov else 5256a3124a3SLatchesar Ionkov flags = O_RDWR; 5266a3124a3SLatchesar Ionkov 527bd238fb4SLatchesar Ionkov fid = v9fs_create(v9ses, dir, dentry, NULL, perm, 5282e4bef41SEric Van Hensbergen v9fs_uflags2omode(flags, v9fs_extended(v9ses))); 529bd238fb4SLatchesar Ionkov if (IS_ERR(fid)) { 530bd238fb4SLatchesar Ionkov err = PTR_ERR(fid); 531bd238fb4SLatchesar Ionkov fid = NULL; 5326a3124a3SLatchesar Ionkov goto error; 5336a3124a3SLatchesar Ionkov } 5346a3124a3SLatchesar Ionkov 535bd238fb4SLatchesar Ionkov /* if we are opening a file, assign the open fid to the file */ 5366a3124a3SLatchesar Ionkov if (nd && nd->flags & LOOKUP_OPEN) { 5376a3124a3SLatchesar Ionkov filp = lookup_instantiate_filp(nd, dentry, v9fs_open_created); 5386a3124a3SLatchesar Ionkov if (IS_ERR(filp)) { 539bd238fb4SLatchesar Ionkov err = PTR_ERR(filp); 540bd238fb4SLatchesar Ionkov goto error; 5416a3124a3SLatchesar Ionkov } 5426a3124a3SLatchesar Ionkov 543bd238fb4SLatchesar Ionkov filp->private_data = fid; 544bd238fb4SLatchesar Ionkov } else 545bd238fb4SLatchesar Ionkov p9_client_clunk(fid); 5466a3124a3SLatchesar Ionkov 5476a3124a3SLatchesar Ionkov return 0; 5486a3124a3SLatchesar Ionkov 5496a3124a3SLatchesar Ionkov error: 550bd238fb4SLatchesar Ionkov if (fid) 551bd238fb4SLatchesar Ionkov p9_client_clunk(fid); 5526a3124a3SLatchesar Ionkov 5536a3124a3SLatchesar Ionkov return err; 5542bad8471SEric Van Hensbergen } 5552bad8471SEric Van Hensbergen 5562bad8471SEric Van Hensbergen /** 5572bad8471SEric Van Hensbergen * v9fs_vfs_mkdir - VFS mkdir hook to create a directory 558ee443996SEric Van Hensbergen * @dir: inode that is being unlinked 5592bad8471SEric Van Hensbergen * @dentry: dentry that is being unlinked 5602bad8471SEric Van Hensbergen * @mode: mode for new directory 5612bad8471SEric Van Hensbergen * 5622bad8471SEric Van Hensbergen */ 5632bad8471SEric Van Hensbergen 5646a3124a3SLatchesar Ionkov static int v9fs_vfs_mkdir(struct inode *dir, struct dentry *dentry, int mode) 5652bad8471SEric Van Hensbergen { 5666a3124a3SLatchesar Ionkov int err; 567bd238fb4SLatchesar Ionkov u32 perm; 5686a3124a3SLatchesar Ionkov struct v9fs_session_info *v9ses; 569bd238fb4SLatchesar Ionkov struct p9_fid *fid; 5706a3124a3SLatchesar Ionkov 571bd238fb4SLatchesar Ionkov P9_DPRINTK(P9_DEBUG_VFS, "name %s\n", dentry->d_name.name); 572bd238fb4SLatchesar Ionkov err = 0; 5736a3124a3SLatchesar Ionkov v9ses = v9fs_inode2v9ses(dir); 5746a3124a3SLatchesar Ionkov perm = unixmode2p9mode(v9ses, mode | S_IFDIR); 575bd238fb4SLatchesar Ionkov fid = v9fs_create(v9ses, dir, dentry, NULL, perm, P9_OREAD); 576bd238fb4SLatchesar Ionkov if (IS_ERR(fid)) { 577bd238fb4SLatchesar Ionkov err = PTR_ERR(fid); 578bd238fb4SLatchesar Ionkov fid = NULL; 5796a3124a3SLatchesar Ionkov } 5806a3124a3SLatchesar Ionkov 581bd238fb4SLatchesar Ionkov if (fid) 582bd238fb4SLatchesar Ionkov p9_client_clunk(fid); 5836a3124a3SLatchesar Ionkov 5846a3124a3SLatchesar Ionkov return err; 5852bad8471SEric Van Hensbergen } 5862bad8471SEric Van Hensbergen 5872bad8471SEric Van Hensbergen /** 5882bad8471SEric Van Hensbergen * v9fs_vfs_lookup - VFS lookup hook to "walk" to a new inode 5892bad8471SEric Van Hensbergen * @dir: inode that is being walked from 5902bad8471SEric Van Hensbergen * @dentry: dentry that is being walked to? 5912bad8471SEric Van Hensbergen * @nameidata: path data 5922bad8471SEric Van Hensbergen * 5932bad8471SEric Van Hensbergen */ 5942bad8471SEric Van Hensbergen 5952bad8471SEric Van Hensbergen static struct dentry *v9fs_vfs_lookup(struct inode *dir, struct dentry *dentry, 5962bad8471SEric Van Hensbergen struct nameidata *nameidata) 5972bad8471SEric Van Hensbergen { 5982bad8471SEric Van Hensbergen struct super_block *sb; 5992bad8471SEric Van Hensbergen struct v9fs_session_info *v9ses; 600bd238fb4SLatchesar Ionkov struct p9_fid *dfid, *fid; 6012bad8471SEric Van Hensbergen struct inode *inode; 602bd238fb4SLatchesar Ionkov char *name; 6032bad8471SEric Van Hensbergen int result = 0; 6042bad8471SEric Van Hensbergen 605bd238fb4SLatchesar Ionkov P9_DPRINTK(P9_DEBUG_VFS, "dir: %p dentry: (%s) %p nameidata: %p\n", 606731805b4SLatchesar Ionkov dir, dentry->d_name.name, dentry, nameidata); 6072bad8471SEric Van Hensbergen 6082bad8471SEric Van Hensbergen sb = dir->i_sb; 6092bad8471SEric Van Hensbergen v9ses = v9fs_inode2v9ses(dir); 610bd238fb4SLatchesar Ionkov dfid = v9fs_fid_lookup(dentry->d_parent); 611bd238fb4SLatchesar Ionkov if (IS_ERR(dfid)) 612e231c2eeSDavid Howells return ERR_CAST(dfid); 6132bad8471SEric Van Hensbergen 614bd238fb4SLatchesar Ionkov name = (char *) dentry->d_name.name; 615bd238fb4SLatchesar Ionkov fid = p9_client_walk(dfid, 1, &name, 1); 616bd238fb4SLatchesar Ionkov if (IS_ERR(fid)) { 617bd238fb4SLatchesar Ionkov result = PTR_ERR(fid); 6182bad8471SEric Van Hensbergen if (result == -ENOENT) { 6192bad8471SEric Van Hensbergen d_add(dentry, NULL); 6202bad8471SEric Van Hensbergen return NULL; 6212bad8471SEric Van Hensbergen } 6222bad8471SEric Van Hensbergen 623bd238fb4SLatchesar Ionkov return ERR_PTR(result); 6242bad8471SEric Van Hensbergen } 6252bad8471SEric Van Hensbergen 626bd238fb4SLatchesar Ionkov inode = v9fs_inode_from_fid(v9ses, fid, dir->i_sb); 627bd238fb4SLatchesar Ionkov if (IS_ERR(inode)) { 628bd238fb4SLatchesar Ionkov result = PTR_ERR(inode); 629bd238fb4SLatchesar Ionkov inode = NULL; 630bd238fb4SLatchesar Ionkov goto error; 6312bad8471SEric Van Hensbergen } 6322bad8471SEric Van Hensbergen 633bd238fb4SLatchesar Ionkov result = v9fs_fid_add(dentry, fid); 6346a3124a3SLatchesar Ionkov if (result < 0) 635bd238fb4SLatchesar Ionkov goto error; 6366a3124a3SLatchesar Ionkov 637e03abc0cSEric Van Hensbergen if ((fid->qid.version) && (v9ses->cache)) 638e03abc0cSEric Van Hensbergen dentry->d_op = &v9fs_cached_dentry_operations; 639e03abc0cSEric Van Hensbergen else 640e03abc0cSEric Van Hensbergen dentry->d_op = &v9fs_dentry_operations; 6412bad8471SEric Van Hensbergen 6422bad8471SEric Van Hensbergen d_add(dentry, inode); 6432bad8471SEric Van Hensbergen return NULL; 6442bad8471SEric Van Hensbergen 645bd238fb4SLatchesar Ionkov error: 646bd238fb4SLatchesar Ionkov p9_client_clunk(fid); 647da977b2cSEric Van Hensbergen 6482bad8471SEric Van Hensbergen return ERR_PTR(result); 6492bad8471SEric Van Hensbergen } 6502bad8471SEric Van Hensbergen 6512bad8471SEric Van Hensbergen /** 6522bad8471SEric Van Hensbergen * v9fs_vfs_unlink - VFS unlink hook to delete an inode 6532bad8471SEric Van Hensbergen * @i: inode that is being unlinked 65473c592b9SEric Van Hensbergen * @d: dentry that is being unlinked 6552bad8471SEric Van Hensbergen * 6562bad8471SEric Van Hensbergen */ 6572bad8471SEric Van Hensbergen 6582bad8471SEric Van Hensbergen static int v9fs_vfs_unlink(struct inode *i, struct dentry *d) 6592bad8471SEric Van Hensbergen { 6602bad8471SEric Van Hensbergen return v9fs_remove(i, d, 0); 6612bad8471SEric Van Hensbergen } 6622bad8471SEric Van Hensbergen 6632bad8471SEric Van Hensbergen /** 6642bad8471SEric Van Hensbergen * v9fs_vfs_rmdir - VFS unlink hook to delete a directory 6652bad8471SEric Van Hensbergen * @i: inode that is being unlinked 66673c592b9SEric Van Hensbergen * @d: dentry that is being unlinked 6672bad8471SEric Van Hensbergen * 6682bad8471SEric Van Hensbergen */ 6692bad8471SEric Van Hensbergen 6702bad8471SEric Van Hensbergen static int v9fs_vfs_rmdir(struct inode *i, struct dentry *d) 6712bad8471SEric Van Hensbergen { 6722bad8471SEric Van Hensbergen return v9fs_remove(i, d, 1); 6732bad8471SEric Van Hensbergen } 6742bad8471SEric Van Hensbergen 6752bad8471SEric Van Hensbergen /** 6762bad8471SEric Van Hensbergen * v9fs_vfs_rename - VFS hook to rename an inode 6772bad8471SEric Van Hensbergen * @old_dir: old dir inode 6782bad8471SEric Van Hensbergen * @old_dentry: old dentry 6792bad8471SEric Van Hensbergen * @new_dir: new dir inode 6802bad8471SEric Van Hensbergen * @new_dentry: new dentry 6812bad8471SEric Van Hensbergen * 6822bad8471SEric Van Hensbergen */ 6832bad8471SEric Van Hensbergen 6842bad8471SEric Van Hensbergen static int 6852bad8471SEric Van Hensbergen v9fs_vfs_rename(struct inode *old_dir, struct dentry *old_dentry, 6862bad8471SEric Van Hensbergen struct inode *new_dir, struct dentry *new_dentry) 6872bad8471SEric Van Hensbergen { 688bd238fb4SLatchesar Ionkov struct inode *old_inode; 689bd238fb4SLatchesar Ionkov struct v9fs_session_info *v9ses; 690bd238fb4SLatchesar Ionkov struct p9_fid *oldfid; 691bd238fb4SLatchesar Ionkov struct p9_fid *olddirfid; 692bd238fb4SLatchesar Ionkov struct p9_fid *newdirfid; 693bd238fb4SLatchesar Ionkov struct p9_wstat wstat; 694bd238fb4SLatchesar Ionkov int retval; 6952bad8471SEric Van Hensbergen 696bd238fb4SLatchesar Ionkov P9_DPRINTK(P9_DEBUG_VFS, "\n"); 697bd238fb4SLatchesar Ionkov retval = 0; 698bd238fb4SLatchesar Ionkov old_inode = old_dentry->d_inode; 699bd238fb4SLatchesar Ionkov v9ses = v9fs_inode2v9ses(old_inode); 700bd238fb4SLatchesar Ionkov oldfid = v9fs_fid_lookup(old_dentry); 701da977b2cSEric Van Hensbergen if (IS_ERR(oldfid)) 702da977b2cSEric Van Hensbergen return PTR_ERR(oldfid); 703da977b2cSEric Van Hensbergen 704da977b2cSEric Van Hensbergen olddirfid = v9fs_fid_clone(old_dentry->d_parent); 705da977b2cSEric Van Hensbergen if (IS_ERR(olddirfid)) { 706da977b2cSEric Van Hensbergen retval = PTR_ERR(olddirfid); 707bd238fb4SLatchesar Ionkov goto done; 708da977b2cSEric Van Hensbergen } 709da977b2cSEric Van Hensbergen 710da977b2cSEric Van Hensbergen newdirfid = v9fs_fid_clone(new_dentry->d_parent); 711da977b2cSEric Van Hensbergen if (IS_ERR(newdirfid)) { 712da977b2cSEric Van Hensbergen retval = PTR_ERR(newdirfid); 713bd238fb4SLatchesar Ionkov goto clunk_olddir; 7142bad8471SEric Van Hensbergen } 7152bad8471SEric Van Hensbergen 7162bad8471SEric Van Hensbergen /* 9P can only handle file rename in the same directory */ 7172bad8471SEric Van Hensbergen if (memcmp(&olddirfid->qid, &newdirfid->qid, sizeof(newdirfid->qid))) { 718bd238fb4SLatchesar Ionkov P9_DPRINTK(P9_DEBUG_ERROR, 719bd238fb4SLatchesar Ionkov "old dir and new dir are different\n"); 720621997cdSEric Van Hensbergen retval = -EXDEV; 721bd238fb4SLatchesar Ionkov goto clunk_newdir; 7222bad8471SEric Van Hensbergen } 7232bad8471SEric Van Hensbergen 724531b1094SLatchesar Ionkov v9fs_blank_wstat(&wstat); 725ba17674fSLatchesar Ionkov wstat.muid = v9ses->uname; 726531b1094SLatchesar Ionkov wstat.name = (char *) new_dentry->d_name.name; 727bd238fb4SLatchesar Ionkov retval = p9_client_wstat(oldfid, &wstat); 7282bad8471SEric Van Hensbergen 729bd238fb4SLatchesar Ionkov clunk_newdir: 73022150c4fSLatchesar Ionkov p9_client_clunk(newdirfid); 7312bad8471SEric Van Hensbergen 732bd238fb4SLatchesar Ionkov clunk_olddir: 73322150c4fSLatchesar Ionkov p9_client_clunk(olddirfid); 7342bad8471SEric Van Hensbergen 735bd238fb4SLatchesar Ionkov done: 7362bad8471SEric Van Hensbergen return retval; 7372bad8471SEric Van Hensbergen } 7382bad8471SEric Van Hensbergen 7392bad8471SEric Van Hensbergen /** 740943ffb58SAdrian Bunk * v9fs_vfs_getattr - retrieve file metadata 741ee443996SEric Van Hensbergen * @mnt: mount information 742ee443996SEric Van Hensbergen * @dentry: file to get attributes on 743ee443996SEric Van Hensbergen * @stat: metadata structure to populate 7442bad8471SEric Van Hensbergen * 7452bad8471SEric Van Hensbergen */ 7462bad8471SEric Van Hensbergen 7472bad8471SEric Van Hensbergen static int 7482bad8471SEric Van Hensbergen v9fs_vfs_getattr(struct vfsmount *mnt, struct dentry *dentry, 7492bad8471SEric Van Hensbergen struct kstat *stat) 7502bad8471SEric Van Hensbergen { 751bd238fb4SLatchesar Ionkov int err; 752bd238fb4SLatchesar Ionkov struct v9fs_session_info *v9ses; 753bd238fb4SLatchesar Ionkov struct p9_fid *fid; 75451a87c55SEric Van Hensbergen struct p9_wstat *st; 7552bad8471SEric Van Hensbergen 756bd238fb4SLatchesar Ionkov P9_DPRINTK(P9_DEBUG_VFS, "dentry: %p\n", dentry); 757bd238fb4SLatchesar Ionkov err = -EPERM; 758bd238fb4SLatchesar Ionkov v9ses = v9fs_inode2v9ses(dentry->d_inode); 7599523a841SEric Van Hensbergen if (v9ses->cache == CACHE_LOOSE) 7609523a841SEric Van Hensbergen return simple_getattr(mnt, dentry, stat); 7619523a841SEric Van Hensbergen 762bd238fb4SLatchesar Ionkov fid = v9fs_fid_lookup(dentry); 763da977b2cSEric Van Hensbergen if (IS_ERR(fid)) 764da977b2cSEric Van Hensbergen return PTR_ERR(fid); 7652bad8471SEric Van Hensbergen 766bd238fb4SLatchesar Ionkov st = p9_client_stat(fid); 767bd238fb4SLatchesar Ionkov if (IS_ERR(st)) 768bd238fb4SLatchesar Ionkov return PTR_ERR(st); 7692bad8471SEric Van Hensbergen 770bd238fb4SLatchesar Ionkov v9fs_stat2inode(st, dentry->d_inode, dentry->d_inode->i_sb); 7712bad8471SEric Van Hensbergen generic_fillattr(dentry->d_inode, stat); 7722bad8471SEric Van Hensbergen 773bd238fb4SLatchesar Ionkov kfree(st); 774bd238fb4SLatchesar Ionkov return 0; 7752bad8471SEric Van Hensbergen } 7762bad8471SEric Van Hensbergen 7772bad8471SEric Van Hensbergen /** 7782bad8471SEric Van Hensbergen * v9fs_vfs_setattr - set file metadata 7792bad8471SEric Van Hensbergen * @dentry: file whose metadata to set 7802bad8471SEric Van Hensbergen * @iattr: metadata assignment structure 7812bad8471SEric Van Hensbergen * 7822bad8471SEric Van Hensbergen */ 7832bad8471SEric Van Hensbergen 7842bad8471SEric Van Hensbergen static int v9fs_vfs_setattr(struct dentry *dentry, struct iattr *iattr) 7852bad8471SEric Van Hensbergen { 786bd238fb4SLatchesar Ionkov int retval; 787bd238fb4SLatchesar Ionkov struct v9fs_session_info *v9ses; 788bd238fb4SLatchesar Ionkov struct p9_fid *fid; 789bd238fb4SLatchesar Ionkov struct p9_wstat wstat; 7902bad8471SEric Van Hensbergen 791bd238fb4SLatchesar Ionkov P9_DPRINTK(P9_DEBUG_VFS, "\n"); 792bd238fb4SLatchesar Ionkov retval = -EPERM; 793bd238fb4SLatchesar Ionkov v9ses = v9fs_inode2v9ses(dentry->d_inode); 794bd238fb4SLatchesar Ionkov fid = v9fs_fid_lookup(dentry); 795da977b2cSEric Van Hensbergen if(IS_ERR(fid)) 796da977b2cSEric Van Hensbergen return PTR_ERR(fid); 7972bad8471SEric Van Hensbergen 798531b1094SLatchesar Ionkov v9fs_blank_wstat(&wstat); 7992bad8471SEric Van Hensbergen if (iattr->ia_valid & ATTR_MODE) 800531b1094SLatchesar Ionkov wstat.mode = unixmode2p9mode(v9ses, iattr->ia_mode); 8012bad8471SEric Van Hensbergen 8022bad8471SEric Van Hensbergen if (iattr->ia_valid & ATTR_MTIME) 803531b1094SLatchesar Ionkov wstat.mtime = iattr->ia_mtime.tv_sec; 8042bad8471SEric Van Hensbergen 8052bad8471SEric Van Hensbergen if (iattr->ia_valid & ATTR_ATIME) 806531b1094SLatchesar Ionkov wstat.atime = iattr->ia_atime.tv_sec; 8072bad8471SEric Van Hensbergen 8082bad8471SEric Van Hensbergen if (iattr->ia_valid & ATTR_SIZE) 809531b1094SLatchesar Ionkov wstat.length = iattr->ia_size; 8102bad8471SEric Van Hensbergen 8112405669bSLatchesar Ionkov if (v9fs_extended(v9ses)) { 812531b1094SLatchesar Ionkov if (iattr->ia_valid & ATTR_UID) 813531b1094SLatchesar Ionkov wstat.n_uid = iattr->ia_uid; 8142bad8471SEric Van Hensbergen 815531b1094SLatchesar Ionkov if (iattr->ia_valid & ATTR_GID) 816531b1094SLatchesar Ionkov wstat.n_gid = iattr->ia_gid; 8172bad8471SEric Van Hensbergen } 8182bad8471SEric Van Hensbergen 819bd238fb4SLatchesar Ionkov retval = p9_client_wstat(fid, &wstat); 820bd238fb4SLatchesar Ionkov if (retval >= 0) 821bd238fb4SLatchesar Ionkov retval = inode_setattr(dentry->d_inode, iattr); 8222bad8471SEric Van Hensbergen 823bd238fb4SLatchesar Ionkov return retval; 8242bad8471SEric Van Hensbergen } 8252bad8471SEric Van Hensbergen 8262bad8471SEric Van Hensbergen /** 827531b1094SLatchesar Ionkov * v9fs_stat2inode - populate an inode structure with mistat info 828531b1094SLatchesar Ionkov * @stat: Plan 9 metadata (mistat) structure 8292bad8471SEric Van Hensbergen * @inode: inode to populate 8302bad8471SEric Van Hensbergen * @sb: superblock of filesystem 8312bad8471SEric Van Hensbergen * 8322bad8471SEric Van Hensbergen */ 8332bad8471SEric Van Hensbergen 8342bad8471SEric Van Hensbergen void 83551a87c55SEric Van Hensbergen v9fs_stat2inode(struct p9_wstat *stat, struct inode *inode, 8362bad8471SEric Van Hensbergen struct super_block *sb) 8372bad8471SEric Van Hensbergen { 838531b1094SLatchesar Ionkov char ext[32]; 8392bad8471SEric Van Hensbergen struct v9fs_session_info *v9ses = sb->s_fs_info; 8402bad8471SEric Van Hensbergen 8412bad8471SEric Van Hensbergen inode->i_nlink = 1; 8422bad8471SEric Van Hensbergen 843531b1094SLatchesar Ionkov inode->i_atime.tv_sec = stat->atime; 844531b1094SLatchesar Ionkov inode->i_mtime.tv_sec = stat->mtime; 845531b1094SLatchesar Ionkov inode->i_ctime.tv_sec = stat->mtime; 8462bad8471SEric Van Hensbergen 847bd32b82dSLatchesar Ionkov inode->i_uid = v9ses->dfltuid; 848bd32b82dSLatchesar Ionkov inode->i_gid = v9ses->dfltgid; 8492bad8471SEric Van Hensbergen 8502405669bSLatchesar Ionkov if (v9fs_extended(v9ses)) { 851531b1094SLatchesar Ionkov inode->i_uid = stat->n_uid; 852531b1094SLatchesar Ionkov inode->i_gid = stat->n_gid; 853531b1094SLatchesar Ionkov } 854531b1094SLatchesar Ionkov 855531b1094SLatchesar Ionkov inode->i_mode = p9mode2unixmode(v9ses, stat->mode); 8562bad8471SEric Van Hensbergen if ((S_ISBLK(inode->i_mode)) || (S_ISCHR(inode->i_mode))) { 8572bad8471SEric Van Hensbergen char type = 0; 8582bad8471SEric Van Hensbergen int major = -1; 8592bad8471SEric Van Hensbergen int minor = -1; 860531b1094SLatchesar Ionkov 86151a87c55SEric Van Hensbergen strncpy(ext, stat->extension, sizeof(ext)); 862531b1094SLatchesar Ionkov sscanf(ext, "%c %u %u", &type, &major, &minor); 8632bad8471SEric Van Hensbergen switch (type) { 8642bad8471SEric Van Hensbergen case 'c': 8652bad8471SEric Van Hensbergen inode->i_mode &= ~S_IFBLK; 8662bad8471SEric Van Hensbergen inode->i_mode |= S_IFCHR; 8672bad8471SEric Van Hensbergen break; 8682bad8471SEric Van Hensbergen case 'b': 8692bad8471SEric Van Hensbergen break; 8702bad8471SEric Van Hensbergen default: 871bd238fb4SLatchesar Ionkov P9_DPRINTK(P9_DEBUG_ERROR, 87251a87c55SEric Van Hensbergen "Unknown special type %c %s\n", type, 87351a87c55SEric Van Hensbergen stat->extension); 8742bad8471SEric Van Hensbergen }; 8752bad8471SEric Van Hensbergen inode->i_rdev = MKDEV(major, minor); 87657c7b4e6SMagnus Deininger init_special_inode(inode, inode->i_mode, inode->i_rdev); 8772bad8471SEric Van Hensbergen } else 8782bad8471SEric Van Hensbergen inode->i_rdev = 0; 8792bad8471SEric Van Hensbergen 880531b1094SLatchesar Ionkov inode->i_size = stat->length; 8812bad8471SEric Van Hensbergen 882bd238fb4SLatchesar Ionkov /* not real number of blocks, but 512 byte ones ... */ 883bd238fb4SLatchesar Ionkov inode->i_blocks = (inode->i_size + 512 - 1) >> 9; 8842bad8471SEric Van Hensbergen } 8852bad8471SEric Van Hensbergen 8862bad8471SEric Van Hensbergen /** 8872bad8471SEric Van Hensbergen * v9fs_qid2ino - convert qid into inode number 8882bad8471SEric Van Hensbergen * @qid: qid to hash 8892bad8471SEric Van Hensbergen * 8902bad8471SEric Van Hensbergen * BUG: potential for inode number collisions? 8912bad8471SEric Van Hensbergen */ 8922bad8471SEric Van Hensbergen 893bd238fb4SLatchesar Ionkov ino_t v9fs_qid2ino(struct p9_qid *qid) 8942bad8471SEric Van Hensbergen { 8952bad8471SEric Van Hensbergen u64 path = qid->path + 2; 8962bad8471SEric Van Hensbergen ino_t i = 0; 8972bad8471SEric Van Hensbergen 8982bad8471SEric Van Hensbergen if (sizeof(ino_t) == sizeof(path)) 8992bad8471SEric Van Hensbergen memcpy(&i, &path, sizeof(ino_t)); 9002bad8471SEric Van Hensbergen else 9012bad8471SEric Van Hensbergen i = (ino_t) (path ^ (path >> 32)); 9022bad8471SEric Van Hensbergen 9032bad8471SEric Van Hensbergen return i; 9042bad8471SEric Van Hensbergen } 9052bad8471SEric Van Hensbergen 9062bad8471SEric Van Hensbergen /** 9072bad8471SEric Van Hensbergen * v9fs_readlink - read a symlink's location (internal version) 9082bad8471SEric Van Hensbergen * @dentry: dentry for symlink 90973c592b9SEric Van Hensbergen * @buffer: buffer to load symlink location into 9102bad8471SEric Van Hensbergen * @buflen: length of buffer 9112bad8471SEric Van Hensbergen * 9122bad8471SEric Van Hensbergen */ 9132bad8471SEric Van Hensbergen 9142bad8471SEric Van Hensbergen static int v9fs_readlink(struct dentry *dentry, char *buffer, int buflen) 9152bad8471SEric Van Hensbergen { 916bd238fb4SLatchesar Ionkov int retval; 9172bad8471SEric Van Hensbergen 918bd238fb4SLatchesar Ionkov struct v9fs_session_info *v9ses; 919bd238fb4SLatchesar Ionkov struct p9_fid *fid; 92051a87c55SEric Van Hensbergen struct p9_wstat *st; 9212bad8471SEric Van Hensbergen 922bd238fb4SLatchesar Ionkov P9_DPRINTK(P9_DEBUG_VFS, " %s\n", dentry->d_name.name); 923bd238fb4SLatchesar Ionkov retval = -EPERM; 924bd238fb4SLatchesar Ionkov v9ses = v9fs_inode2v9ses(dentry->d_inode); 925bd238fb4SLatchesar Ionkov fid = v9fs_fid_lookup(dentry); 926da977b2cSEric Van Hensbergen if (IS_ERR(fid)) 927da977b2cSEric Van Hensbergen return PTR_ERR(fid); 9282bad8471SEric Van Hensbergen 9292405669bSLatchesar Ionkov if (!v9fs_extended(v9ses)) 930bd238fb4SLatchesar Ionkov return -EBADF; 9312bad8471SEric Van Hensbergen 932bd238fb4SLatchesar Ionkov st = p9_client_stat(fid); 933bd238fb4SLatchesar Ionkov if (IS_ERR(st)) 934bd238fb4SLatchesar Ionkov return PTR_ERR(st); 9352bad8471SEric Van Hensbergen 936bd238fb4SLatchesar Ionkov if (!(st->mode & P9_DMSYMLINK)) { 9372bad8471SEric Van Hensbergen retval = -EINVAL; 938bd238fb4SLatchesar Ionkov goto done; 9392bad8471SEric Van Hensbergen } 9402bad8471SEric Van Hensbergen 9412bad8471SEric Van Hensbergen /* copy extension buffer into buffer */ 94251a87c55SEric Van Hensbergen strncpy(buffer, st->extension, buflen); 9432bad8471SEric Van Hensbergen 944bd238fb4SLatchesar Ionkov P9_DPRINTK(P9_DEBUG_VFS, 94551a87c55SEric Van Hensbergen "%s -> %s (%s)\n", dentry->d_name.name, st->extension, buffer); 946bd238fb4SLatchesar Ionkov 9472bad8471SEric Van Hensbergen retval = buflen; 9482bad8471SEric Van Hensbergen 949bd238fb4SLatchesar Ionkov done: 950bd238fb4SLatchesar Ionkov kfree(st); 9512bad8471SEric Van Hensbergen return retval; 9522bad8471SEric Van Hensbergen } 9532bad8471SEric Van Hensbergen 9542bad8471SEric Van Hensbergen /** 9552bad8471SEric Van Hensbergen * v9fs_vfs_readlink - read a symlink's location 9562bad8471SEric Van Hensbergen * @dentry: dentry for symlink 957ee443996SEric Van Hensbergen * @buffer: buffer to load symlink location into 9582bad8471SEric Van Hensbergen * @buflen: length of buffer 9592bad8471SEric Van Hensbergen * 9602bad8471SEric Van Hensbergen */ 9612bad8471SEric Van Hensbergen 9622bad8471SEric Van Hensbergen static int v9fs_vfs_readlink(struct dentry *dentry, char __user * buffer, 9632bad8471SEric Van Hensbergen int buflen) 9642bad8471SEric Van Hensbergen { 9652bad8471SEric Van Hensbergen int retval; 9662bad8471SEric Van Hensbergen int ret; 9672bad8471SEric Van Hensbergen char *link = __getname(); 9682bad8471SEric Van Hensbergen 9690710d36aSFlorin Malita if (unlikely(!link)) 9700710d36aSFlorin Malita return -ENOMEM; 9710710d36aSFlorin Malita 972a1f9d8d2SLatchesar Ionkov if (buflen > PATH_MAX) 973a1f9d8d2SLatchesar Ionkov buflen = PATH_MAX; 9742bad8471SEric Van Hensbergen 9757dd0cdc5SWu Fengguang P9_DPRINTK(P9_DEBUG_VFS, " dentry: %s (%p)\n", dentry->d_name.name, 9767dd0cdc5SWu Fengguang dentry); 9772bad8471SEric Van Hensbergen 9782bad8471SEric Van Hensbergen retval = v9fs_readlink(dentry, link, buflen); 9792bad8471SEric Van Hensbergen 9802bad8471SEric Van Hensbergen if (retval > 0) { 9812bad8471SEric Van Hensbergen if ((ret = copy_to_user(buffer, link, retval)) != 0) { 982bd238fb4SLatchesar Ionkov P9_DPRINTK(P9_DEBUG_ERROR, 983bd238fb4SLatchesar Ionkov "problem copying to user: %d\n", ret); 9842bad8471SEric Van Hensbergen retval = ret; 9852bad8471SEric Van Hensbergen } 9862bad8471SEric Van Hensbergen } 9872bad8471SEric Van Hensbergen 988ce44eeb6SDavi Arnaut __putname(link); 9892bad8471SEric Van Hensbergen return retval; 9902bad8471SEric Van Hensbergen } 9912bad8471SEric Van Hensbergen 9922bad8471SEric Van Hensbergen /** 9932bad8471SEric Van Hensbergen * v9fs_vfs_follow_link - follow a symlink path 9942bad8471SEric Van Hensbergen * @dentry: dentry for symlink 9952bad8471SEric Van Hensbergen * @nd: nameidata 9962bad8471SEric Van Hensbergen * 9972bad8471SEric Van Hensbergen */ 9982bad8471SEric Van Hensbergen 9992bad8471SEric Van Hensbergen static void *v9fs_vfs_follow_link(struct dentry *dentry, struct nameidata *nd) 10002bad8471SEric Van Hensbergen { 10012bad8471SEric Van Hensbergen int len = 0; 10022bad8471SEric Van Hensbergen char *link = __getname(); 10032bad8471SEric Van Hensbergen 1004bd238fb4SLatchesar Ionkov P9_DPRINTK(P9_DEBUG_VFS, "%s n", dentry->d_name.name); 10052bad8471SEric Van Hensbergen 10062bad8471SEric Van Hensbergen if (!link) 10072bad8471SEric Van Hensbergen link = ERR_PTR(-ENOMEM); 10082bad8471SEric Van Hensbergen else { 100916cce6d2SLatchesar Ionkov len = v9fs_readlink(dentry, link, PATH_MAX); 10102bad8471SEric Van Hensbergen 10112bad8471SEric Van Hensbergen if (len < 0) { 1012ce44eeb6SDavi Arnaut __putname(link); 10132bad8471SEric Van Hensbergen link = ERR_PTR(len); 10142bad8471SEric Van Hensbergen } else 10152bad8471SEric Van Hensbergen link[len] = 0; 10162bad8471SEric Van Hensbergen } 10172bad8471SEric Van Hensbergen nd_set_link(nd, link); 10182bad8471SEric Van Hensbergen 10192bad8471SEric Van Hensbergen return NULL; 10202bad8471SEric Van Hensbergen } 10212bad8471SEric Van Hensbergen 10222bad8471SEric Van Hensbergen /** 10232bad8471SEric Van Hensbergen * v9fs_vfs_put_link - release a symlink path 10242bad8471SEric Van Hensbergen * @dentry: dentry for symlink 10252bad8471SEric Van Hensbergen * @nd: nameidata 1026ee443996SEric Van Hensbergen * @p: unused 10272bad8471SEric Van Hensbergen * 10282bad8471SEric Van Hensbergen */ 10292bad8471SEric Van Hensbergen 1030ee443996SEric Van Hensbergen static void 1031ee443996SEric Van Hensbergen v9fs_vfs_put_link(struct dentry *dentry, struct nameidata *nd, void *p) 10322bad8471SEric Van Hensbergen { 10332bad8471SEric Van Hensbergen char *s = nd_get_link(nd); 10342bad8471SEric Van Hensbergen 10356ff23207SDuane Griffin P9_DPRINTK(P9_DEBUG_VFS, " %s %s\n", dentry->d_name.name, 10366ff23207SDuane Griffin IS_ERR(s) ? "<error>" : s); 10372bad8471SEric Van Hensbergen if (!IS_ERR(s)) 1038ce44eeb6SDavi Arnaut __putname(s); 10392bad8471SEric Van Hensbergen } 10402bad8471SEric Van Hensbergen 1041ee443996SEric Van Hensbergen /** 1042ee443996SEric Van Hensbergen * v9fs_vfs_mkspecial - create a special file 1043ee443996SEric Van Hensbergen * @dir: inode to create special file in 1044ee443996SEric Van Hensbergen * @dentry: dentry to create 1045ee443996SEric Van Hensbergen * @mode: mode to create special file 1046ee443996SEric Van Hensbergen * @extension: 9p2000.u format extension string representing special file 1047ee443996SEric Van Hensbergen * 1048ee443996SEric Van Hensbergen */ 1049ee443996SEric Van Hensbergen 1050531b1094SLatchesar Ionkov static int v9fs_vfs_mkspecial(struct inode *dir, struct dentry *dentry, 1051531b1094SLatchesar Ionkov int mode, const char *extension) 1052531b1094SLatchesar Ionkov { 1053bd238fb4SLatchesar Ionkov u32 perm; 1054531b1094SLatchesar Ionkov struct v9fs_session_info *v9ses; 1055bd238fb4SLatchesar Ionkov struct p9_fid *fid; 1056531b1094SLatchesar Ionkov 10576a3124a3SLatchesar Ionkov v9ses = v9fs_inode2v9ses(dir); 10582405669bSLatchesar Ionkov if (!v9fs_extended(v9ses)) { 1059bd238fb4SLatchesar Ionkov P9_DPRINTK(P9_DEBUG_ERROR, "not extended\n"); 10606a3124a3SLatchesar Ionkov return -EPERM; 1061531b1094SLatchesar Ionkov } 1062531b1094SLatchesar Ionkov 1063da977b2cSEric Van Hensbergen perm = unixmode2p9mode(v9ses, mode); 1064bd238fb4SLatchesar Ionkov fid = v9fs_create(v9ses, dir, dentry, (char *) extension, perm, 1065bd238fb4SLatchesar Ionkov P9_OREAD); 1066bd238fb4SLatchesar Ionkov if (IS_ERR(fid)) 1067bd238fb4SLatchesar Ionkov return PTR_ERR(fid); 1068da977b2cSEric Van Hensbergen 1069bd238fb4SLatchesar Ionkov p9_client_clunk(fid); 10706a3124a3SLatchesar Ionkov return 0; 1071531b1094SLatchesar Ionkov } 1072531b1094SLatchesar Ionkov 1073531b1094SLatchesar Ionkov /** 1074531b1094SLatchesar Ionkov * v9fs_vfs_symlink - helper function to create symlinks 1075531b1094SLatchesar Ionkov * @dir: directory inode containing symlink 1076531b1094SLatchesar Ionkov * @dentry: dentry for symlink 1077531b1094SLatchesar Ionkov * @symname: symlink data 1078531b1094SLatchesar Ionkov * 1079ee443996SEric Van Hensbergen * See Also: 9P2000.u RFC for more information 1080531b1094SLatchesar Ionkov * 1081531b1094SLatchesar Ionkov */ 1082531b1094SLatchesar Ionkov 1083531b1094SLatchesar Ionkov static int 1084531b1094SLatchesar Ionkov v9fs_vfs_symlink(struct inode *dir, struct dentry *dentry, const char *symname) 1085531b1094SLatchesar Ionkov { 1086bd238fb4SLatchesar Ionkov P9_DPRINTK(P9_DEBUG_VFS, " %lu,%s,%s\n", dir->i_ino, 1087bd238fb4SLatchesar Ionkov dentry->d_name.name, symname); 1088531b1094SLatchesar Ionkov 1089531b1094SLatchesar Ionkov return v9fs_vfs_mkspecial(dir, dentry, S_IFLNK, symname); 1090531b1094SLatchesar Ionkov } 1091531b1094SLatchesar Ionkov 10922bad8471SEric Van Hensbergen /** 10932bad8471SEric Van Hensbergen * v9fs_vfs_link - create a hardlink 10942bad8471SEric Van Hensbergen * @old_dentry: dentry for file to link to 10952bad8471SEric Van Hensbergen * @dir: inode destination for new link 109673c592b9SEric Van Hensbergen * @dentry: dentry for link 10972bad8471SEric Van Hensbergen * 10982bad8471SEric Van Hensbergen */ 10992bad8471SEric Van Hensbergen 11002bad8471SEric Van Hensbergen static int 11012bad8471SEric Van Hensbergen v9fs_vfs_link(struct dentry *old_dentry, struct inode *dir, 11022bad8471SEric Van Hensbergen struct dentry *dentry) 11032bad8471SEric Van Hensbergen { 1104531b1094SLatchesar Ionkov int retval; 1105bd238fb4SLatchesar Ionkov struct p9_fid *oldfid; 1106531b1094SLatchesar Ionkov char *name; 11072bad8471SEric Van Hensbergen 1108bd238fb4SLatchesar Ionkov P9_DPRINTK(P9_DEBUG_VFS, 1109bd238fb4SLatchesar Ionkov " %lu,%s,%s\n", dir->i_ino, dentry->d_name.name, 11102bad8471SEric Van Hensbergen old_dentry->d_name.name); 11112bad8471SEric Van Hensbergen 1112da977b2cSEric Van Hensbergen oldfid = v9fs_fid_clone(old_dentry); 1113da977b2cSEric Van Hensbergen if (IS_ERR(oldfid)) 1114da977b2cSEric Van Hensbergen return PTR_ERR(oldfid); 11152bad8471SEric Van Hensbergen 1116531b1094SLatchesar Ionkov name = __getname(); 1117da977b2cSEric Van Hensbergen if (unlikely(!name)) { 1118da977b2cSEric Van Hensbergen retval = -ENOMEM; 1119da977b2cSEric Van Hensbergen goto clunk_fid; 1120da977b2cSEric Van Hensbergen } 11210710d36aSFlorin Malita 112216cce6d2SLatchesar Ionkov sprintf(name, "%d\n", oldfid->fid); 1123bd238fb4SLatchesar Ionkov retval = v9fs_vfs_mkspecial(dir, dentry, P9_DMLINK, name); 1124531b1094SLatchesar Ionkov __putname(name); 11252bad8471SEric Van Hensbergen 1126da977b2cSEric Van Hensbergen clunk_fid: 1127bd238fb4SLatchesar Ionkov p9_client_clunk(oldfid); 11282bad8471SEric Van Hensbergen return retval; 11292bad8471SEric Van Hensbergen } 11302bad8471SEric Van Hensbergen 11312bad8471SEric Van Hensbergen /** 11322bad8471SEric Van Hensbergen * v9fs_vfs_mknod - create a special file 11332bad8471SEric Van Hensbergen * @dir: inode destination for new link 11342bad8471SEric Van Hensbergen * @dentry: dentry for file 11352bad8471SEric Van Hensbergen * @mode: mode for creation 1136ee443996SEric Van Hensbergen * @rdev: device associated with special file 11372bad8471SEric Van Hensbergen * 11382bad8471SEric Van Hensbergen */ 11392bad8471SEric Van Hensbergen 11402bad8471SEric Van Hensbergen static int 11412bad8471SEric Van Hensbergen v9fs_vfs_mknod(struct inode *dir, struct dentry *dentry, int mode, dev_t rdev) 11422bad8471SEric Van Hensbergen { 1143531b1094SLatchesar Ionkov int retval; 1144531b1094SLatchesar Ionkov char *name; 11452bad8471SEric Van Hensbergen 1146bd238fb4SLatchesar Ionkov P9_DPRINTK(P9_DEBUG_VFS, 1147bd238fb4SLatchesar Ionkov " %lu,%s mode: %x MAJOR: %u MINOR: %u\n", dir->i_ino, 11482bad8471SEric Van Hensbergen dentry->d_name.name, mode, MAJOR(rdev), MINOR(rdev)); 11492bad8471SEric Van Hensbergen 1150531b1094SLatchesar Ionkov if (!new_valid_dev(rdev)) 1151531b1094SLatchesar Ionkov return -EINVAL; 115273c592b9SEric Van Hensbergen 1153531b1094SLatchesar Ionkov name = __getname(); 1154c0291a05SEugene Teo if (!name) 1155c0291a05SEugene Teo return -ENOMEM; 11562bad8471SEric Van Hensbergen /* build extension */ 11572bad8471SEric Van Hensbergen if (S_ISBLK(mode)) 1158531b1094SLatchesar Ionkov sprintf(name, "b %u %u", MAJOR(rdev), MINOR(rdev)); 11592bad8471SEric Van Hensbergen else if (S_ISCHR(mode)) 1160531b1094SLatchesar Ionkov sprintf(name, "c %u %u", MAJOR(rdev), MINOR(rdev)); 116173c592b9SEric Van Hensbergen else if (S_ISFIFO(mode)) 1162531b1094SLatchesar Ionkov *name = 0; 11632bad8471SEric Van Hensbergen else { 1164531b1094SLatchesar Ionkov __putname(name); 1165531b1094SLatchesar Ionkov return -EINVAL; 11662bad8471SEric Van Hensbergen } 11672bad8471SEric Van Hensbergen 1168531b1094SLatchesar Ionkov retval = v9fs_vfs_mkspecial(dir, dentry, mode, name); 1169531b1094SLatchesar Ionkov __putname(name); 11702bad8471SEric Van Hensbergen 11712bad8471SEric Van Hensbergen return retval; 11722bad8471SEric Van Hensbergen } 11732bad8471SEric Van Hensbergen 1174754661f1SArjan van de Ven static const struct inode_operations v9fs_dir_inode_operations_ext = { 11752bad8471SEric Van Hensbergen .create = v9fs_vfs_create, 11762bad8471SEric Van Hensbergen .lookup = v9fs_vfs_lookup, 11772bad8471SEric Van Hensbergen .symlink = v9fs_vfs_symlink, 11782bad8471SEric Van Hensbergen .link = v9fs_vfs_link, 11792bad8471SEric Van Hensbergen .unlink = v9fs_vfs_unlink, 11802bad8471SEric Van Hensbergen .mkdir = v9fs_vfs_mkdir, 11812bad8471SEric Van Hensbergen .rmdir = v9fs_vfs_rmdir, 11822bad8471SEric Van Hensbergen .mknod = v9fs_vfs_mknod, 11832bad8471SEric Van Hensbergen .rename = v9fs_vfs_rename, 11842bad8471SEric Van Hensbergen .readlink = v9fs_vfs_readlink, 11852bad8471SEric Van Hensbergen .getattr = v9fs_vfs_getattr, 11862bad8471SEric Van Hensbergen .setattr = v9fs_vfs_setattr, 11872bad8471SEric Van Hensbergen }; 11882bad8471SEric Van Hensbergen 1189754661f1SArjan van de Ven static const struct inode_operations v9fs_dir_inode_operations = { 1190b501611aSEric Van Hensbergen .create = v9fs_vfs_create, 1191b501611aSEric Van Hensbergen .lookup = v9fs_vfs_lookup, 1192b501611aSEric Van Hensbergen .unlink = v9fs_vfs_unlink, 1193b501611aSEric Van Hensbergen .mkdir = v9fs_vfs_mkdir, 1194b501611aSEric Van Hensbergen .rmdir = v9fs_vfs_rmdir, 1195b501611aSEric Van Hensbergen .mknod = v9fs_vfs_mknod, 1196b501611aSEric Van Hensbergen .rename = v9fs_vfs_rename, 1197b501611aSEric Van Hensbergen .getattr = v9fs_vfs_getattr, 1198b501611aSEric Van Hensbergen .setattr = v9fs_vfs_setattr, 1199b501611aSEric Van Hensbergen }; 1200b501611aSEric Van Hensbergen 1201754661f1SArjan van de Ven static const struct inode_operations v9fs_file_inode_operations = { 12022bad8471SEric Van Hensbergen .getattr = v9fs_vfs_getattr, 12032bad8471SEric Van Hensbergen .setattr = v9fs_vfs_setattr, 12042bad8471SEric Van Hensbergen }; 12052bad8471SEric Van Hensbergen 1206754661f1SArjan van de Ven static const struct inode_operations v9fs_symlink_inode_operations = { 12072bad8471SEric Van Hensbergen .readlink = v9fs_vfs_readlink, 12082bad8471SEric Van Hensbergen .follow_link = v9fs_vfs_follow_link, 12092bad8471SEric Van Hensbergen .put_link = v9fs_vfs_put_link, 12102bad8471SEric Van Hensbergen .getattr = v9fs_vfs_getattr, 12112bad8471SEric Van Hensbergen .setattr = v9fs_vfs_setattr, 12122bad8471SEric Van Hensbergen }; 1213