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 1742bad8471SEric Van Hensbergen * @v9ses: 9P session info (for determining extended mode) 175531b1094SLatchesar Ionkov * @wstat: structure to initialize 1762bad8471SEric Van Hensbergen * 1772bad8471SEric Van Hensbergen */ 1782bad8471SEric Van Hensbergen 17973c592b9SEric Van Hensbergen static void 180bd238fb4SLatchesar Ionkov v9fs_blank_wstat(struct p9_wstat *wstat) 1812bad8471SEric Van Hensbergen { 182531b1094SLatchesar Ionkov wstat->type = ~0; 183531b1094SLatchesar Ionkov wstat->dev = ~0; 184531b1094SLatchesar Ionkov wstat->qid.type = ~0; 185531b1094SLatchesar Ionkov wstat->qid.version = ~0; 186531b1094SLatchesar Ionkov *((long long *)&wstat->qid.path) = ~0; 187531b1094SLatchesar Ionkov wstat->mode = ~0; 188531b1094SLatchesar Ionkov wstat->atime = ~0; 189531b1094SLatchesar Ionkov wstat->mtime = ~0; 190531b1094SLatchesar Ionkov wstat->length = ~0; 191531b1094SLatchesar Ionkov wstat->name = NULL; 192531b1094SLatchesar Ionkov wstat->uid = NULL; 193531b1094SLatchesar Ionkov wstat->gid = NULL; 194531b1094SLatchesar Ionkov wstat->muid = NULL; 195531b1094SLatchesar Ionkov wstat->n_uid = ~0; 196531b1094SLatchesar Ionkov wstat->n_gid = ~0; 197531b1094SLatchesar Ionkov wstat->n_muid = ~0; 198531b1094SLatchesar Ionkov wstat->extension = NULL; 1992bad8471SEric Van Hensbergen } 2002bad8471SEric Van Hensbergen 2012bad8471SEric Van Hensbergen /** 2022bad8471SEric Van Hensbergen * v9fs_get_inode - helper function to setup an inode 2032bad8471SEric Van Hensbergen * @sb: superblock 2042bad8471SEric Van Hensbergen * @mode: mode to setup inode with 2052bad8471SEric Van Hensbergen * 2062bad8471SEric Van Hensbergen */ 2072bad8471SEric Van Hensbergen 2082bad8471SEric Van Hensbergen struct inode *v9fs_get_inode(struct super_block *sb, int mode) 2092bad8471SEric Van Hensbergen { 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); 2162bad8471SEric Van Hensbergen if (inode) { 2172bad8471SEric Van Hensbergen inode->i_mode = mode; 2182bad8471SEric Van Hensbergen inode->i_uid = current->fsuid; 2192bad8471SEric Van Hensbergen inode->i_gid = current->fsgid; 2202bad8471SEric Van Hensbergen inode->i_blocks = 0; 2212bad8471SEric Van Hensbergen inode->i_rdev = 0; 2222bad8471SEric Van Hensbergen inode->i_atime = inode->i_mtime = inode->i_ctime = CURRENT_TIME; 223147b31cfSEric Van Hensbergen inode->i_mapping->a_ops = &v9fs_addr_operations; 2242bad8471SEric Van Hensbergen 2252bad8471SEric Van Hensbergen switch (mode & S_IFMT) { 2262bad8471SEric Van Hensbergen case S_IFIFO: 2272bad8471SEric Van Hensbergen case S_IFBLK: 2282bad8471SEric Van Hensbergen case S_IFCHR: 2292bad8471SEric Van Hensbergen case S_IFSOCK: 2302405669bSLatchesar Ionkov if (!v9fs_extended(v9ses)) { 231bd238fb4SLatchesar Ionkov P9_DPRINTK(P9_DEBUG_ERROR, 232bd238fb4SLatchesar Ionkov "special files without extended mode\n"); 233b501611aSEric Van Hensbergen return ERR_PTR(-EINVAL); 234b501611aSEric Van Hensbergen } 2355d58bec5SEric Van Hensbergen init_special_inode(inode, inode->i_mode, 2365d58bec5SEric Van Hensbergen inode->i_rdev); 2375d58bec5SEric Van Hensbergen break; 2382bad8471SEric Van Hensbergen case S_IFREG: 2392bad8471SEric Van Hensbergen inode->i_op = &v9fs_file_inode_operations; 2402bad8471SEric Van Hensbergen inode->i_fop = &v9fs_file_operations; 2412bad8471SEric Van Hensbergen break; 242b501611aSEric Van Hensbergen case S_IFLNK: 2432405669bSLatchesar Ionkov if (!v9fs_extended(v9ses)) { 244bd238fb4SLatchesar Ionkov P9_DPRINTK(P9_DEBUG_ERROR, 245bd238fb4SLatchesar Ionkov "extended modes used w/o 9P2000.u\n"); 246b501611aSEric Van Hensbergen return ERR_PTR(-EINVAL); 247b501611aSEric Van Hensbergen } 248b501611aSEric Van Hensbergen inode->i_op = &v9fs_symlink_inode_operations; 249b501611aSEric Van Hensbergen break; 2502bad8471SEric Van Hensbergen case S_IFDIR: 251d8c76e6fSDave Hansen inc_nlink(inode); 2522405669bSLatchesar Ionkov if (v9fs_extended(v9ses)) 253b501611aSEric Van Hensbergen inode->i_op = &v9fs_dir_inode_operations_ext; 254b501611aSEric Van Hensbergen else 2552bad8471SEric Van Hensbergen inode->i_op = &v9fs_dir_inode_operations; 2562bad8471SEric Van Hensbergen inode->i_fop = &v9fs_dir_operations; 2572bad8471SEric Van Hensbergen break; 2582bad8471SEric Van Hensbergen default: 259bd238fb4SLatchesar Ionkov P9_DPRINTK(P9_DEBUG_ERROR, 260bd238fb4SLatchesar Ionkov "BAD mode 0x%x S_IFMT 0x%x\n", 2612bad8471SEric Van Hensbergen mode, mode & S_IFMT); 2622bad8471SEric Van Hensbergen return ERR_PTR(-EINVAL); 2632bad8471SEric Van Hensbergen } 2642bad8471SEric Van Hensbergen } else { 265bd238fb4SLatchesar Ionkov P9_EPRINTK(KERN_WARNING, "Problem allocating inode\n"); 2662bad8471SEric Van Hensbergen return ERR_PTR(-ENOMEM); 2672bad8471SEric Van Hensbergen } 2682bad8471SEric Van Hensbergen return inode; 2692bad8471SEric Van Hensbergen } 2702bad8471SEric Van Hensbergen 271bd238fb4SLatchesar Ionkov /* 2726a3124a3SLatchesar Ionkov static struct v9fs_fid* 2736a3124a3SLatchesar Ionkov v9fs_clone_walk(struct v9fs_session_info *v9ses, u32 fid, struct dentry *dentry) 2746a3124a3SLatchesar Ionkov { 2756a3124a3SLatchesar Ionkov int err; 276736c4b85SMika Kukkonen int nfid; 2776a3124a3SLatchesar Ionkov struct v9fs_fid *ret; 2786a3124a3SLatchesar Ionkov struct v9fs_fcall *fcall; 2790b8dd177SLatchesar Ionkov 2806a3124a3SLatchesar Ionkov nfid = v9fs_get_idpool(&v9ses->fidpool); 2816a3124a3SLatchesar Ionkov if (nfid < 0) { 2820b8dd177SLatchesar Ionkov eprintk(KERN_WARNING, "no free fids available\n"); 283731805b4SLatchesar Ionkov return ERR_PTR(-ENOSPC); 2840b8dd177SLatchesar Ionkov } 2850b8dd177SLatchesar Ionkov 2866a3124a3SLatchesar Ionkov err = v9fs_t_walk(v9ses, fid, nfid, (char *) dentry->d_name.name, 2876a3124a3SLatchesar Ionkov &fcall); 2886a3124a3SLatchesar Ionkov 2896a3124a3SLatchesar Ionkov if (err < 0) { 29041e5a6acSLatchesar Ionkov if (fcall && fcall->id == RWALK) 29141e5a6acSLatchesar Ionkov goto clunk_fid; 29241e5a6acSLatchesar Ionkov 2936a3124a3SLatchesar Ionkov PRINT_FCALL_ERROR("walk error", fcall); 2946a3124a3SLatchesar Ionkov v9fs_put_idpool(nfid, &v9ses->fidpool); 2956a3124a3SLatchesar Ionkov goto error; 2960b8dd177SLatchesar Ionkov } 2976a3124a3SLatchesar Ionkov 2983cf6429aSLatchesar Ionkov kfree(fcall); 2993cf6429aSLatchesar Ionkov fcall = NULL; 3006a3124a3SLatchesar Ionkov ret = v9fs_fid_create(v9ses, nfid); 3016a3124a3SLatchesar Ionkov if (!ret) { 3026a3124a3SLatchesar Ionkov err = -ENOMEM; 3036a3124a3SLatchesar Ionkov goto clunk_fid; 3040b8dd177SLatchesar Ionkov } 3052bad8471SEric Van Hensbergen 3066a3124a3SLatchesar Ionkov err = v9fs_fid_insert(ret, dentry); 3076a3124a3SLatchesar Ionkov if (err < 0) { 3086a3124a3SLatchesar Ionkov v9fs_fid_destroy(ret); 3096a3124a3SLatchesar Ionkov goto clunk_fid; 3106a3124a3SLatchesar Ionkov } 3112bad8471SEric Van Hensbergen 3126a3124a3SLatchesar Ionkov return ret; 3136a3124a3SLatchesar Ionkov 3146a3124a3SLatchesar Ionkov clunk_fid: 3156a3124a3SLatchesar Ionkov v9fs_t_clunk(v9ses, nfid); 3166a3124a3SLatchesar Ionkov 3176a3124a3SLatchesar Ionkov error: 3186a3124a3SLatchesar Ionkov kfree(fcall); 3196a3124a3SLatchesar Ionkov return ERR_PTR(err); 3206a3124a3SLatchesar Ionkov } 321bd238fb4SLatchesar Ionkov */ 3226a3124a3SLatchesar Ionkov 323ee443996SEric Van Hensbergen /** 324ee443996SEric Van Hensbergen * v9fs_inode_from_fid - populate an inode by issuing a attribute request 325ee443996SEric Van Hensbergen * @v9ses: session information 326ee443996SEric Van Hensbergen * @fid: fid to issue attribute request for 327ee443996SEric Van Hensbergen * @sb: superblock on which to create inode 328ee443996SEric Van Hensbergen * 329ee443996SEric Van Hensbergen */ 330ee443996SEric Van Hensbergen 3315174fdabSLatchesar Ionkov static struct inode * 332bd238fb4SLatchesar Ionkov v9fs_inode_from_fid(struct v9fs_session_info *v9ses, struct p9_fid *fid, 3336a3124a3SLatchesar Ionkov struct super_block *sb) 3346a3124a3SLatchesar Ionkov { 3356a3124a3SLatchesar Ionkov int err, umode; 3366a3124a3SLatchesar Ionkov struct inode *ret; 33751a87c55SEric Van Hensbergen struct p9_wstat *st; 3386a3124a3SLatchesar Ionkov 3396a3124a3SLatchesar Ionkov ret = NULL; 340bd238fb4SLatchesar Ionkov st = p9_client_stat(fid); 341bd238fb4SLatchesar Ionkov if (IS_ERR(st)) { 342bd238fb4SLatchesar Ionkov err = PTR_ERR(st); 343bd238fb4SLatchesar Ionkov st = NULL; 3446a3124a3SLatchesar Ionkov goto error; 3452bad8471SEric Van Hensbergen } 3462bad8471SEric Van Hensbergen 347bd238fb4SLatchesar Ionkov umode = p9mode2unixmode(v9ses, st->mode); 3486a3124a3SLatchesar Ionkov ret = v9fs_get_inode(sb, umode); 3496a3124a3SLatchesar Ionkov if (IS_ERR(ret)) { 3506a3124a3SLatchesar Ionkov err = PTR_ERR(ret); 3516a3124a3SLatchesar Ionkov ret = NULL; 3526a3124a3SLatchesar Ionkov goto error; 3532bad8471SEric Van Hensbergen } 3542bad8471SEric Van Hensbergen 355bd238fb4SLatchesar Ionkov v9fs_stat2inode(st, ret, sb); 356bd238fb4SLatchesar Ionkov ret->i_ino = v9fs_qid2ino(&st->qid); 357bd238fb4SLatchesar Ionkov kfree(st); 3586a3124a3SLatchesar Ionkov return ret; 3592bad8471SEric Van Hensbergen 3606a3124a3SLatchesar Ionkov error: 361bd238fb4SLatchesar Ionkov kfree(st); 3626a3124a3SLatchesar Ionkov if (ret) 3636a3124a3SLatchesar Ionkov iput(ret); 3642bad8471SEric Van Hensbergen 3656a3124a3SLatchesar Ionkov return ERR_PTR(err); 3662bad8471SEric Van Hensbergen } 3672bad8471SEric Van Hensbergen 3682bad8471SEric Van Hensbergen /** 3692bad8471SEric Van Hensbergen * v9fs_remove - helper function to remove files and directories 37073c592b9SEric Van Hensbergen * @dir: directory inode that is being deleted 37173c592b9SEric Van Hensbergen * @file: dentry that is being deleted 37273c592b9SEric Van Hensbergen * @rmdir: removing a directory 3732bad8471SEric Van Hensbergen * 3742bad8471SEric Van Hensbergen */ 3752bad8471SEric Van Hensbergen 3762bad8471SEric Van Hensbergen static int v9fs_remove(struct inode *dir, struct dentry *file, int rmdir) 3772bad8471SEric Van Hensbergen { 378bd238fb4SLatchesar Ionkov struct inode *file_inode; 379bd238fb4SLatchesar Ionkov struct v9fs_session_info *v9ses; 380bd238fb4SLatchesar Ionkov struct p9_fid *v9fid; 3812bad8471SEric Van Hensbergen 382bd238fb4SLatchesar Ionkov P9_DPRINTK(P9_DEBUG_VFS, "inode: %p dentry: %p rmdir: %d\n", dir, file, 3832bad8471SEric Van Hensbergen rmdir); 3842bad8471SEric Van Hensbergen 3852bad8471SEric Van Hensbergen file_inode = file->d_inode; 3862bad8471SEric Van Hensbergen v9ses = v9fs_inode2v9ses(file_inode); 387c959df9fSLatchesar Ionkov v9fid = v9fs_fid_clone(file); 388da977b2cSEric Van Hensbergen if (IS_ERR(v9fid)) 389da977b2cSEric Van Hensbergen return PTR_ERR(v9fid); 3902bad8471SEric Van Hensbergen 391bd238fb4SLatchesar Ionkov return p9_client_remove(v9fid); 3922bad8471SEric Van Hensbergen } 3932bad8471SEric Van Hensbergen 3946a3124a3SLatchesar Ionkov static int 3956a3124a3SLatchesar Ionkov v9fs_open_created(struct inode *inode, struct file *file) 3966a3124a3SLatchesar Ionkov { 3976a3124a3SLatchesar Ionkov return 0; 3986a3124a3SLatchesar Ionkov } 3996a3124a3SLatchesar Ionkov 400bd238fb4SLatchesar Ionkov 401bd238fb4SLatchesar Ionkov /** 402bd238fb4SLatchesar Ionkov * v9fs_create - Create a file 403ee443996SEric Van Hensbergen * @v9ses: session information 404ee443996SEric Van Hensbergen * @dir: directory that dentry is being created in 405bd238fb4SLatchesar Ionkov * @dentry: dentry that is being created 406bd238fb4SLatchesar Ionkov * @perm: create permissions 407bd238fb4SLatchesar Ionkov * @mode: open mode 408ee443996SEric Van Hensbergen * @extension: 9p2000.u extension string to support devices, etc. 409bd238fb4SLatchesar Ionkov * 410bd238fb4SLatchesar Ionkov */ 411bd238fb4SLatchesar Ionkov static struct p9_fid * 412bd238fb4SLatchesar Ionkov v9fs_create(struct v9fs_session_info *v9ses, struct inode *dir, 413bd238fb4SLatchesar Ionkov struct dentry *dentry, char *extension, u32 perm, u8 mode) 414bd238fb4SLatchesar Ionkov { 415bd238fb4SLatchesar Ionkov int err; 416bd238fb4SLatchesar Ionkov char *name; 417bd238fb4SLatchesar Ionkov struct p9_fid *dfid, *ofid, *fid; 418bd238fb4SLatchesar Ionkov struct inode *inode; 419bd238fb4SLatchesar Ionkov 42051a87c55SEric Van Hensbergen P9_DPRINTK(P9_DEBUG_VFS, "name %s\n", dentry->d_name.name); 42151a87c55SEric Van Hensbergen 422bd238fb4SLatchesar Ionkov err = 0; 423bd238fb4SLatchesar Ionkov ofid = NULL; 424bd238fb4SLatchesar Ionkov fid = NULL; 425bd238fb4SLatchesar Ionkov name = (char *) dentry->d_name.name; 426bd238fb4SLatchesar Ionkov dfid = v9fs_fid_clone(dentry->d_parent); 427bd238fb4SLatchesar Ionkov if (IS_ERR(dfid)) { 428bd238fb4SLatchesar Ionkov err = PTR_ERR(dfid); 42951a87c55SEric Van Hensbergen P9_DPRINTK(P9_DEBUG_VFS, "fid clone failed %d\n", err); 430bd238fb4SLatchesar Ionkov dfid = NULL; 431bd238fb4SLatchesar Ionkov goto error; 432bd238fb4SLatchesar Ionkov } 433bd238fb4SLatchesar Ionkov 434bd238fb4SLatchesar Ionkov /* clone a fid to use for creation */ 435bd238fb4SLatchesar Ionkov ofid = p9_client_walk(dfid, 0, NULL, 1); 436bd238fb4SLatchesar Ionkov if (IS_ERR(ofid)) { 437bd238fb4SLatchesar Ionkov err = PTR_ERR(ofid); 43851a87c55SEric Van Hensbergen P9_DPRINTK(P9_DEBUG_VFS, "p9_client_walk failed %d\n", err); 439bd238fb4SLatchesar Ionkov ofid = NULL; 440bd238fb4SLatchesar Ionkov goto error; 441bd238fb4SLatchesar Ionkov } 442bd238fb4SLatchesar Ionkov 443bd238fb4SLatchesar Ionkov err = p9_client_fcreate(ofid, name, perm, mode, extension); 44451a87c55SEric Van Hensbergen if (err < 0) { 44551a87c55SEric Van Hensbergen P9_DPRINTK(P9_DEBUG_VFS, "p9_client_fcreate failed %d\n", err); 446bd238fb4SLatchesar Ionkov goto error; 44751a87c55SEric Van Hensbergen } 448bd238fb4SLatchesar Ionkov 449bd238fb4SLatchesar Ionkov /* now walk from the parent so we can get unopened fid */ 450bd238fb4SLatchesar Ionkov fid = p9_client_walk(dfid, 1, &name, 0); 451bd238fb4SLatchesar Ionkov if (IS_ERR(fid)) { 452bd238fb4SLatchesar Ionkov err = PTR_ERR(fid); 45351a87c55SEric Van Hensbergen P9_DPRINTK(P9_DEBUG_VFS, "p9_client_walk failed %d\n", err); 454bd238fb4SLatchesar Ionkov fid = NULL; 455bd238fb4SLatchesar Ionkov goto error; 456bd238fb4SLatchesar Ionkov } else 457bd238fb4SLatchesar Ionkov dfid = NULL; 458bd238fb4SLatchesar Ionkov 459bd238fb4SLatchesar Ionkov /* instantiate inode and assign the unopened fid to the dentry */ 460bd238fb4SLatchesar Ionkov inode = v9fs_inode_from_fid(v9ses, fid, dir->i_sb); 461bd238fb4SLatchesar Ionkov if (IS_ERR(inode)) { 462bd238fb4SLatchesar Ionkov err = PTR_ERR(inode); 46351a87c55SEric Van Hensbergen P9_DPRINTK(P9_DEBUG_VFS, "inode creation failed %d\n", err); 464bd238fb4SLatchesar Ionkov goto error; 465bd238fb4SLatchesar Ionkov } 466bd238fb4SLatchesar Ionkov 467bd238fb4SLatchesar Ionkov if (v9ses->cache) 468bd238fb4SLatchesar Ionkov dentry->d_op = &v9fs_cached_dentry_operations; 469bd238fb4SLatchesar Ionkov else 470bd238fb4SLatchesar Ionkov dentry->d_op = &v9fs_dentry_operations; 471bd238fb4SLatchesar Ionkov 472bd238fb4SLatchesar Ionkov d_instantiate(dentry, inode); 473bd238fb4SLatchesar Ionkov v9fs_fid_add(dentry, fid); 474bd238fb4SLatchesar Ionkov return ofid; 475bd238fb4SLatchesar Ionkov 476bd238fb4SLatchesar Ionkov error: 477bd238fb4SLatchesar Ionkov if (dfid) 478bd238fb4SLatchesar Ionkov p9_client_clunk(dfid); 479bd238fb4SLatchesar Ionkov 480bd238fb4SLatchesar Ionkov if (ofid) 481bd238fb4SLatchesar Ionkov p9_client_clunk(ofid); 482bd238fb4SLatchesar Ionkov 483bd238fb4SLatchesar Ionkov if (fid) 484bd238fb4SLatchesar Ionkov p9_client_clunk(fid); 485bd238fb4SLatchesar Ionkov 486bd238fb4SLatchesar Ionkov return ERR_PTR(err); 487bd238fb4SLatchesar Ionkov } 488bd238fb4SLatchesar Ionkov 4892bad8471SEric Van Hensbergen /** 4902bad8471SEric Van Hensbergen * v9fs_vfs_create - VFS hook to create files 491ee443996SEric Van Hensbergen * @dir: directory inode that is being created 4922bad8471SEric Van Hensbergen * @dentry: dentry that is being deleted 4936a3124a3SLatchesar Ionkov * @mode: create permissions 4942bad8471SEric Van Hensbergen * @nd: path information 4952bad8471SEric Van Hensbergen * 4962bad8471SEric Van Hensbergen */ 4972bad8471SEric Van Hensbergen 4982bad8471SEric Van Hensbergen static int 4996a3124a3SLatchesar Ionkov v9fs_vfs_create(struct inode *dir, struct dentry *dentry, int mode, 5002bad8471SEric Van Hensbergen struct nameidata *nd) 5012bad8471SEric Van Hensbergen { 5026a3124a3SLatchesar Ionkov int err; 503bd238fb4SLatchesar Ionkov u32 perm; 5046a3124a3SLatchesar Ionkov int flags; 5056a3124a3SLatchesar Ionkov struct v9fs_session_info *v9ses; 506bd238fb4SLatchesar Ionkov struct p9_fid *fid; 5076a3124a3SLatchesar Ionkov struct file *filp; 5086a3124a3SLatchesar Ionkov 509bd238fb4SLatchesar Ionkov err = 0; 510bd238fb4SLatchesar Ionkov fid = NULL; 5116a3124a3SLatchesar Ionkov v9ses = v9fs_inode2v9ses(dir); 512da977b2cSEric Van Hensbergen perm = unixmode2p9mode(v9ses, mode); 5136a3124a3SLatchesar Ionkov if (nd && nd->flags & LOOKUP_OPEN) 5146a3124a3SLatchesar Ionkov flags = nd->intent.open.flags - 1; 5156a3124a3SLatchesar Ionkov else 5166a3124a3SLatchesar Ionkov flags = O_RDWR; 5176a3124a3SLatchesar Ionkov 518bd238fb4SLatchesar Ionkov fid = v9fs_create(v9ses, dir, dentry, NULL, perm, 5192e4bef41SEric Van Hensbergen v9fs_uflags2omode(flags, v9fs_extended(v9ses))); 520bd238fb4SLatchesar Ionkov if (IS_ERR(fid)) { 521bd238fb4SLatchesar Ionkov err = PTR_ERR(fid); 522bd238fb4SLatchesar Ionkov fid = NULL; 5236a3124a3SLatchesar Ionkov goto error; 5246a3124a3SLatchesar Ionkov } 5256a3124a3SLatchesar Ionkov 526bd238fb4SLatchesar Ionkov /* if we are opening a file, assign the open fid to the file */ 5276a3124a3SLatchesar Ionkov if (nd && nd->flags & LOOKUP_OPEN) { 5286a3124a3SLatchesar Ionkov filp = lookup_instantiate_filp(nd, dentry, v9fs_open_created); 5296a3124a3SLatchesar Ionkov if (IS_ERR(filp)) { 530bd238fb4SLatchesar Ionkov err = PTR_ERR(filp); 531bd238fb4SLatchesar Ionkov goto error; 5326a3124a3SLatchesar Ionkov } 5336a3124a3SLatchesar Ionkov 534bd238fb4SLatchesar Ionkov filp->private_data = fid; 535bd238fb4SLatchesar Ionkov } else 536bd238fb4SLatchesar Ionkov p9_client_clunk(fid); 5376a3124a3SLatchesar Ionkov 5386a3124a3SLatchesar Ionkov return 0; 5396a3124a3SLatchesar Ionkov 5406a3124a3SLatchesar Ionkov error: 541bd238fb4SLatchesar Ionkov if (fid) 542bd238fb4SLatchesar Ionkov p9_client_clunk(fid); 5436a3124a3SLatchesar Ionkov 5446a3124a3SLatchesar Ionkov return err; 5452bad8471SEric Van Hensbergen } 5462bad8471SEric Van Hensbergen 5472bad8471SEric Van Hensbergen /** 5482bad8471SEric Van Hensbergen * v9fs_vfs_mkdir - VFS mkdir hook to create a directory 549ee443996SEric Van Hensbergen * @dir: inode that is being unlinked 5502bad8471SEric Van Hensbergen * @dentry: dentry that is being unlinked 5512bad8471SEric Van Hensbergen * @mode: mode for new directory 5522bad8471SEric Van Hensbergen * 5532bad8471SEric Van Hensbergen */ 5542bad8471SEric Van Hensbergen 5556a3124a3SLatchesar Ionkov static int v9fs_vfs_mkdir(struct inode *dir, struct dentry *dentry, int mode) 5562bad8471SEric Van Hensbergen { 5576a3124a3SLatchesar Ionkov int err; 558bd238fb4SLatchesar Ionkov u32 perm; 5596a3124a3SLatchesar Ionkov struct v9fs_session_info *v9ses; 560bd238fb4SLatchesar Ionkov struct p9_fid *fid; 5616a3124a3SLatchesar Ionkov 562bd238fb4SLatchesar Ionkov P9_DPRINTK(P9_DEBUG_VFS, "name %s\n", dentry->d_name.name); 563bd238fb4SLatchesar Ionkov err = 0; 5646a3124a3SLatchesar Ionkov v9ses = v9fs_inode2v9ses(dir); 5656a3124a3SLatchesar Ionkov perm = unixmode2p9mode(v9ses, mode | S_IFDIR); 566bd238fb4SLatchesar Ionkov fid = v9fs_create(v9ses, dir, dentry, NULL, perm, P9_OREAD); 567bd238fb4SLatchesar Ionkov if (IS_ERR(fid)) { 568bd238fb4SLatchesar Ionkov err = PTR_ERR(fid); 569bd238fb4SLatchesar Ionkov fid = NULL; 5706a3124a3SLatchesar Ionkov } 5716a3124a3SLatchesar Ionkov 572bd238fb4SLatchesar Ionkov if (fid) 573bd238fb4SLatchesar Ionkov p9_client_clunk(fid); 5746a3124a3SLatchesar Ionkov 5756a3124a3SLatchesar Ionkov return err; 5762bad8471SEric Van Hensbergen } 5772bad8471SEric Van Hensbergen 5782bad8471SEric Van Hensbergen /** 5792bad8471SEric Van Hensbergen * v9fs_vfs_lookup - VFS lookup hook to "walk" to a new inode 5802bad8471SEric Van Hensbergen * @dir: inode that is being walked from 5812bad8471SEric Van Hensbergen * @dentry: dentry that is being walked to? 5822bad8471SEric Van Hensbergen * @nameidata: path data 5832bad8471SEric Van Hensbergen * 5842bad8471SEric Van Hensbergen */ 5852bad8471SEric Van Hensbergen 5862bad8471SEric Van Hensbergen static struct dentry *v9fs_vfs_lookup(struct inode *dir, struct dentry *dentry, 5872bad8471SEric Van Hensbergen struct nameidata *nameidata) 5882bad8471SEric Van Hensbergen { 5892bad8471SEric Van Hensbergen struct super_block *sb; 5902bad8471SEric Van Hensbergen struct v9fs_session_info *v9ses; 591bd238fb4SLatchesar Ionkov struct p9_fid *dfid, *fid; 5922bad8471SEric Van Hensbergen struct inode *inode; 593bd238fb4SLatchesar Ionkov char *name; 5942bad8471SEric Van Hensbergen int result = 0; 5952bad8471SEric Van Hensbergen 596bd238fb4SLatchesar Ionkov P9_DPRINTK(P9_DEBUG_VFS, "dir: %p dentry: (%s) %p nameidata: %p\n", 597731805b4SLatchesar Ionkov dir, dentry->d_name.name, dentry, nameidata); 5982bad8471SEric Van Hensbergen 5992bad8471SEric Van Hensbergen sb = dir->i_sb; 6002bad8471SEric Van Hensbergen v9ses = v9fs_inode2v9ses(dir); 601bd238fb4SLatchesar Ionkov dfid = v9fs_fid_lookup(dentry->d_parent); 602bd238fb4SLatchesar Ionkov if (IS_ERR(dfid)) 603e231c2eeSDavid Howells return ERR_CAST(dfid); 6042bad8471SEric Van Hensbergen 605bd238fb4SLatchesar Ionkov name = (char *) dentry->d_name.name; 606bd238fb4SLatchesar Ionkov fid = p9_client_walk(dfid, 1, &name, 1); 607bd238fb4SLatchesar Ionkov if (IS_ERR(fid)) { 608bd238fb4SLatchesar Ionkov result = PTR_ERR(fid); 6092bad8471SEric Van Hensbergen if (result == -ENOENT) { 6102bad8471SEric Van Hensbergen d_add(dentry, NULL); 6112bad8471SEric Van Hensbergen return NULL; 6122bad8471SEric Van Hensbergen } 6132bad8471SEric Van Hensbergen 614bd238fb4SLatchesar Ionkov return ERR_PTR(result); 6152bad8471SEric Van Hensbergen } 6162bad8471SEric Van Hensbergen 617bd238fb4SLatchesar Ionkov inode = v9fs_inode_from_fid(v9ses, fid, dir->i_sb); 618bd238fb4SLatchesar Ionkov if (IS_ERR(inode)) { 619bd238fb4SLatchesar Ionkov result = PTR_ERR(inode); 620bd238fb4SLatchesar Ionkov inode = NULL; 621bd238fb4SLatchesar Ionkov goto error; 6222bad8471SEric Van Hensbergen } 6232bad8471SEric Van Hensbergen 624bd238fb4SLatchesar Ionkov result = v9fs_fid_add(dentry, fid); 6256a3124a3SLatchesar Ionkov if (result < 0) 626bd238fb4SLatchesar Ionkov goto error; 6276a3124a3SLatchesar Ionkov 628e03abc0cSEric Van Hensbergen if ((fid->qid.version) && (v9ses->cache)) 629e03abc0cSEric Van Hensbergen dentry->d_op = &v9fs_cached_dentry_operations; 630e03abc0cSEric Van Hensbergen else 631e03abc0cSEric Van Hensbergen dentry->d_op = &v9fs_dentry_operations; 6322bad8471SEric Van Hensbergen 6332bad8471SEric Van Hensbergen d_add(dentry, inode); 6342bad8471SEric Van Hensbergen return NULL; 6352bad8471SEric Van Hensbergen 636bd238fb4SLatchesar Ionkov error: 637bd238fb4SLatchesar Ionkov p9_client_clunk(fid); 638da977b2cSEric Van Hensbergen 6392bad8471SEric Van Hensbergen return ERR_PTR(result); 6402bad8471SEric Van Hensbergen } 6412bad8471SEric Van Hensbergen 6422bad8471SEric Van Hensbergen /** 6432bad8471SEric Van Hensbergen * v9fs_vfs_unlink - VFS unlink hook to delete an inode 6442bad8471SEric Van Hensbergen * @i: inode that is being unlinked 64573c592b9SEric Van Hensbergen * @d: dentry that is being unlinked 6462bad8471SEric Van Hensbergen * 6472bad8471SEric Van Hensbergen */ 6482bad8471SEric Van Hensbergen 6492bad8471SEric Van Hensbergen static int v9fs_vfs_unlink(struct inode *i, struct dentry *d) 6502bad8471SEric Van Hensbergen { 6512bad8471SEric Van Hensbergen return v9fs_remove(i, d, 0); 6522bad8471SEric Van Hensbergen } 6532bad8471SEric Van Hensbergen 6542bad8471SEric Van Hensbergen /** 6552bad8471SEric Van Hensbergen * v9fs_vfs_rmdir - VFS unlink hook to delete a directory 6562bad8471SEric Van Hensbergen * @i: inode that is being unlinked 65773c592b9SEric Van Hensbergen * @d: dentry that is being unlinked 6582bad8471SEric Van Hensbergen * 6592bad8471SEric Van Hensbergen */ 6602bad8471SEric Van Hensbergen 6612bad8471SEric Van Hensbergen static int v9fs_vfs_rmdir(struct inode *i, struct dentry *d) 6622bad8471SEric Van Hensbergen { 6632bad8471SEric Van Hensbergen return v9fs_remove(i, d, 1); 6642bad8471SEric Van Hensbergen } 6652bad8471SEric Van Hensbergen 6662bad8471SEric Van Hensbergen /** 6672bad8471SEric Van Hensbergen * v9fs_vfs_rename - VFS hook to rename an inode 6682bad8471SEric Van Hensbergen * @old_dir: old dir inode 6692bad8471SEric Van Hensbergen * @old_dentry: old dentry 6702bad8471SEric Van Hensbergen * @new_dir: new dir inode 6712bad8471SEric Van Hensbergen * @new_dentry: new dentry 6722bad8471SEric Van Hensbergen * 6732bad8471SEric Van Hensbergen */ 6742bad8471SEric Van Hensbergen 6752bad8471SEric Van Hensbergen static int 6762bad8471SEric Van Hensbergen v9fs_vfs_rename(struct inode *old_dir, struct dentry *old_dentry, 6772bad8471SEric Van Hensbergen struct inode *new_dir, struct dentry *new_dentry) 6782bad8471SEric Van Hensbergen { 679bd238fb4SLatchesar Ionkov struct inode *old_inode; 680bd238fb4SLatchesar Ionkov struct v9fs_session_info *v9ses; 681bd238fb4SLatchesar Ionkov struct p9_fid *oldfid; 682bd238fb4SLatchesar Ionkov struct p9_fid *olddirfid; 683bd238fb4SLatchesar Ionkov struct p9_fid *newdirfid; 684bd238fb4SLatchesar Ionkov struct p9_wstat wstat; 685bd238fb4SLatchesar Ionkov int retval; 6862bad8471SEric Van Hensbergen 687bd238fb4SLatchesar Ionkov P9_DPRINTK(P9_DEBUG_VFS, "\n"); 688bd238fb4SLatchesar Ionkov retval = 0; 689bd238fb4SLatchesar Ionkov old_inode = old_dentry->d_inode; 690bd238fb4SLatchesar Ionkov v9ses = v9fs_inode2v9ses(old_inode); 691bd238fb4SLatchesar Ionkov oldfid = v9fs_fid_lookup(old_dentry); 692da977b2cSEric Van Hensbergen if (IS_ERR(oldfid)) 693da977b2cSEric Van Hensbergen return PTR_ERR(oldfid); 694da977b2cSEric Van Hensbergen 695da977b2cSEric Van Hensbergen olddirfid = v9fs_fid_clone(old_dentry->d_parent); 696da977b2cSEric Van Hensbergen if (IS_ERR(olddirfid)) { 697da977b2cSEric Van Hensbergen retval = PTR_ERR(olddirfid); 698bd238fb4SLatchesar Ionkov goto done; 699da977b2cSEric Van Hensbergen } 700da977b2cSEric Van Hensbergen 701da977b2cSEric Van Hensbergen newdirfid = v9fs_fid_clone(new_dentry->d_parent); 702da977b2cSEric Van Hensbergen if (IS_ERR(newdirfid)) { 703da977b2cSEric Van Hensbergen retval = PTR_ERR(newdirfid); 704bd238fb4SLatchesar Ionkov goto clunk_olddir; 7052bad8471SEric Van Hensbergen } 7062bad8471SEric Van Hensbergen 7072bad8471SEric Van Hensbergen /* 9P can only handle file rename in the same directory */ 7082bad8471SEric Van Hensbergen if (memcmp(&olddirfid->qid, &newdirfid->qid, sizeof(newdirfid->qid))) { 709bd238fb4SLatchesar Ionkov P9_DPRINTK(P9_DEBUG_ERROR, 710bd238fb4SLatchesar Ionkov "old dir and new dir are different\n"); 711621997cdSEric Van Hensbergen retval = -EXDEV; 712bd238fb4SLatchesar Ionkov goto clunk_newdir; 7132bad8471SEric Van Hensbergen } 7142bad8471SEric Van Hensbergen 715531b1094SLatchesar Ionkov v9fs_blank_wstat(&wstat); 716ba17674fSLatchesar Ionkov wstat.muid = v9ses->uname; 717531b1094SLatchesar Ionkov wstat.name = (char *) new_dentry->d_name.name; 718bd238fb4SLatchesar Ionkov retval = p9_client_wstat(oldfid, &wstat); 7192bad8471SEric Van Hensbergen 720bd238fb4SLatchesar Ionkov clunk_newdir: 72122150c4fSLatchesar Ionkov p9_client_clunk(newdirfid); 7222bad8471SEric Van Hensbergen 723bd238fb4SLatchesar Ionkov clunk_olddir: 72422150c4fSLatchesar Ionkov p9_client_clunk(olddirfid); 7252bad8471SEric Van Hensbergen 726bd238fb4SLatchesar Ionkov done: 7272bad8471SEric Van Hensbergen return retval; 7282bad8471SEric Van Hensbergen } 7292bad8471SEric Van Hensbergen 7302bad8471SEric Van Hensbergen /** 731943ffb58SAdrian Bunk * v9fs_vfs_getattr - retrieve file metadata 732ee443996SEric Van Hensbergen * @mnt: mount information 733ee443996SEric Van Hensbergen * @dentry: file to get attributes on 734ee443996SEric Van Hensbergen * @stat: metadata structure to populate 7352bad8471SEric Van Hensbergen * 7362bad8471SEric Van Hensbergen */ 7372bad8471SEric Van Hensbergen 7382bad8471SEric Van Hensbergen static int 7392bad8471SEric Van Hensbergen v9fs_vfs_getattr(struct vfsmount *mnt, struct dentry *dentry, 7402bad8471SEric Van Hensbergen struct kstat *stat) 7412bad8471SEric Van Hensbergen { 742bd238fb4SLatchesar Ionkov int err; 743bd238fb4SLatchesar Ionkov struct v9fs_session_info *v9ses; 744bd238fb4SLatchesar Ionkov struct p9_fid *fid; 74551a87c55SEric Van Hensbergen struct p9_wstat *st; 7462bad8471SEric Van Hensbergen 747bd238fb4SLatchesar Ionkov P9_DPRINTK(P9_DEBUG_VFS, "dentry: %p\n", dentry); 748bd238fb4SLatchesar Ionkov err = -EPERM; 749bd238fb4SLatchesar Ionkov v9ses = v9fs_inode2v9ses(dentry->d_inode); 7509523a841SEric Van Hensbergen if (v9ses->cache == CACHE_LOOSE) 7519523a841SEric Van Hensbergen return simple_getattr(mnt, dentry, stat); 7529523a841SEric Van Hensbergen 753bd238fb4SLatchesar Ionkov fid = v9fs_fid_lookup(dentry); 754da977b2cSEric Van Hensbergen if (IS_ERR(fid)) 755da977b2cSEric Van Hensbergen return PTR_ERR(fid); 7562bad8471SEric Van Hensbergen 757bd238fb4SLatchesar Ionkov st = p9_client_stat(fid); 758bd238fb4SLatchesar Ionkov if (IS_ERR(st)) 759bd238fb4SLatchesar Ionkov return PTR_ERR(st); 7602bad8471SEric Van Hensbergen 761bd238fb4SLatchesar Ionkov v9fs_stat2inode(st, dentry->d_inode, dentry->d_inode->i_sb); 7622bad8471SEric Van Hensbergen generic_fillattr(dentry->d_inode, stat); 7632bad8471SEric Van Hensbergen 764bd238fb4SLatchesar Ionkov kfree(st); 765bd238fb4SLatchesar Ionkov return 0; 7662bad8471SEric Van Hensbergen } 7672bad8471SEric Van Hensbergen 7682bad8471SEric Van Hensbergen /** 7692bad8471SEric Van Hensbergen * v9fs_vfs_setattr - set file metadata 7702bad8471SEric Van Hensbergen * @dentry: file whose metadata to set 7712bad8471SEric Van Hensbergen * @iattr: metadata assignment structure 7722bad8471SEric Van Hensbergen * 7732bad8471SEric Van Hensbergen */ 7742bad8471SEric Van Hensbergen 7752bad8471SEric Van Hensbergen static int v9fs_vfs_setattr(struct dentry *dentry, struct iattr *iattr) 7762bad8471SEric Van Hensbergen { 777bd238fb4SLatchesar Ionkov int retval; 778bd238fb4SLatchesar Ionkov struct v9fs_session_info *v9ses; 779bd238fb4SLatchesar Ionkov struct p9_fid *fid; 780bd238fb4SLatchesar Ionkov struct p9_wstat wstat; 7812bad8471SEric Van Hensbergen 782bd238fb4SLatchesar Ionkov P9_DPRINTK(P9_DEBUG_VFS, "\n"); 783bd238fb4SLatchesar Ionkov retval = -EPERM; 784bd238fb4SLatchesar Ionkov v9ses = v9fs_inode2v9ses(dentry->d_inode); 785bd238fb4SLatchesar Ionkov fid = v9fs_fid_lookup(dentry); 786da977b2cSEric Van Hensbergen if(IS_ERR(fid)) 787da977b2cSEric Van Hensbergen return PTR_ERR(fid); 7882bad8471SEric Van Hensbergen 789531b1094SLatchesar Ionkov v9fs_blank_wstat(&wstat); 7902bad8471SEric Van Hensbergen if (iattr->ia_valid & ATTR_MODE) 791531b1094SLatchesar Ionkov wstat.mode = unixmode2p9mode(v9ses, iattr->ia_mode); 7922bad8471SEric Van Hensbergen 7932bad8471SEric Van Hensbergen if (iattr->ia_valid & ATTR_MTIME) 794531b1094SLatchesar Ionkov wstat.mtime = iattr->ia_mtime.tv_sec; 7952bad8471SEric Van Hensbergen 7962bad8471SEric Van Hensbergen if (iattr->ia_valid & ATTR_ATIME) 797531b1094SLatchesar Ionkov wstat.atime = iattr->ia_atime.tv_sec; 7982bad8471SEric Van Hensbergen 7992bad8471SEric Van Hensbergen if (iattr->ia_valid & ATTR_SIZE) 800531b1094SLatchesar Ionkov wstat.length = iattr->ia_size; 8012bad8471SEric Van Hensbergen 8022405669bSLatchesar Ionkov if (v9fs_extended(v9ses)) { 803531b1094SLatchesar Ionkov if (iattr->ia_valid & ATTR_UID) 804531b1094SLatchesar Ionkov wstat.n_uid = iattr->ia_uid; 8052bad8471SEric Van Hensbergen 806531b1094SLatchesar Ionkov if (iattr->ia_valid & ATTR_GID) 807531b1094SLatchesar Ionkov wstat.n_gid = iattr->ia_gid; 8082bad8471SEric Van Hensbergen } 8092bad8471SEric Van Hensbergen 810bd238fb4SLatchesar Ionkov retval = p9_client_wstat(fid, &wstat); 811bd238fb4SLatchesar Ionkov if (retval >= 0) 812bd238fb4SLatchesar Ionkov retval = inode_setattr(dentry->d_inode, iattr); 8132bad8471SEric Van Hensbergen 814bd238fb4SLatchesar Ionkov return retval; 8152bad8471SEric Van Hensbergen } 8162bad8471SEric Van Hensbergen 8172bad8471SEric Van Hensbergen /** 818531b1094SLatchesar Ionkov * v9fs_stat2inode - populate an inode structure with mistat info 819531b1094SLatchesar Ionkov * @stat: Plan 9 metadata (mistat) structure 8202bad8471SEric Van Hensbergen * @inode: inode to populate 8212bad8471SEric Van Hensbergen * @sb: superblock of filesystem 8222bad8471SEric Van Hensbergen * 8232bad8471SEric Van Hensbergen */ 8242bad8471SEric Van Hensbergen 8252bad8471SEric Van Hensbergen void 82651a87c55SEric Van Hensbergen v9fs_stat2inode(struct p9_wstat *stat, struct inode *inode, 8272bad8471SEric Van Hensbergen struct super_block *sb) 8282bad8471SEric Van Hensbergen { 829531b1094SLatchesar Ionkov char ext[32]; 8302bad8471SEric Van Hensbergen struct v9fs_session_info *v9ses = sb->s_fs_info; 8312bad8471SEric Van Hensbergen 8322bad8471SEric Van Hensbergen inode->i_nlink = 1; 8332bad8471SEric Van Hensbergen 834531b1094SLatchesar Ionkov inode->i_atime.tv_sec = stat->atime; 835531b1094SLatchesar Ionkov inode->i_mtime.tv_sec = stat->mtime; 836531b1094SLatchesar Ionkov inode->i_ctime.tv_sec = stat->mtime; 8372bad8471SEric Van Hensbergen 838bd32b82dSLatchesar Ionkov inode->i_uid = v9ses->dfltuid; 839bd32b82dSLatchesar Ionkov inode->i_gid = v9ses->dfltgid; 8402bad8471SEric Van Hensbergen 8412405669bSLatchesar Ionkov if (v9fs_extended(v9ses)) { 842531b1094SLatchesar Ionkov inode->i_uid = stat->n_uid; 843531b1094SLatchesar Ionkov inode->i_gid = stat->n_gid; 844531b1094SLatchesar Ionkov } 845531b1094SLatchesar Ionkov 846531b1094SLatchesar Ionkov inode->i_mode = p9mode2unixmode(v9ses, stat->mode); 8472bad8471SEric Van Hensbergen if ((S_ISBLK(inode->i_mode)) || (S_ISCHR(inode->i_mode))) { 8482bad8471SEric Van Hensbergen char type = 0; 8492bad8471SEric Van Hensbergen int major = -1; 8502bad8471SEric Van Hensbergen int minor = -1; 851531b1094SLatchesar Ionkov 85251a87c55SEric Van Hensbergen strncpy(ext, stat->extension, sizeof(ext)); 853531b1094SLatchesar Ionkov sscanf(ext, "%c %u %u", &type, &major, &minor); 8542bad8471SEric Van Hensbergen switch (type) { 8552bad8471SEric Van Hensbergen case 'c': 8562bad8471SEric Van Hensbergen inode->i_mode &= ~S_IFBLK; 8572bad8471SEric Van Hensbergen inode->i_mode |= S_IFCHR; 8582bad8471SEric Van Hensbergen break; 8592bad8471SEric Van Hensbergen case 'b': 8602bad8471SEric Van Hensbergen break; 8612bad8471SEric Van Hensbergen default: 862bd238fb4SLatchesar Ionkov P9_DPRINTK(P9_DEBUG_ERROR, 86351a87c55SEric Van Hensbergen "Unknown special type %c %s\n", type, 86451a87c55SEric Van Hensbergen stat->extension); 8652bad8471SEric Van Hensbergen }; 8662bad8471SEric Van Hensbergen inode->i_rdev = MKDEV(major, minor); 8672bad8471SEric Van Hensbergen } else 8682bad8471SEric Van Hensbergen inode->i_rdev = 0; 8692bad8471SEric Van Hensbergen 870531b1094SLatchesar Ionkov inode->i_size = stat->length; 8712bad8471SEric Van Hensbergen 872bd238fb4SLatchesar Ionkov /* not real number of blocks, but 512 byte ones ... */ 873bd238fb4SLatchesar Ionkov inode->i_blocks = (inode->i_size + 512 - 1) >> 9; 8742bad8471SEric Van Hensbergen } 8752bad8471SEric Van Hensbergen 8762bad8471SEric Van Hensbergen /** 8772bad8471SEric Van Hensbergen * v9fs_qid2ino - convert qid into inode number 8782bad8471SEric Van Hensbergen * @qid: qid to hash 8792bad8471SEric Van Hensbergen * 8802bad8471SEric Van Hensbergen * BUG: potential for inode number collisions? 8812bad8471SEric Van Hensbergen */ 8822bad8471SEric Van Hensbergen 883bd238fb4SLatchesar Ionkov ino_t v9fs_qid2ino(struct p9_qid *qid) 8842bad8471SEric Van Hensbergen { 8852bad8471SEric Van Hensbergen u64 path = qid->path + 2; 8862bad8471SEric Van Hensbergen ino_t i = 0; 8872bad8471SEric Van Hensbergen 8882bad8471SEric Van Hensbergen if (sizeof(ino_t) == sizeof(path)) 8892bad8471SEric Van Hensbergen memcpy(&i, &path, sizeof(ino_t)); 8902bad8471SEric Van Hensbergen else 8912bad8471SEric Van Hensbergen i = (ino_t) (path ^ (path >> 32)); 8922bad8471SEric Van Hensbergen 8932bad8471SEric Van Hensbergen return i; 8942bad8471SEric Van Hensbergen } 8952bad8471SEric Van Hensbergen 8962bad8471SEric Van Hensbergen /** 8972bad8471SEric Van Hensbergen * v9fs_readlink - read a symlink's location (internal version) 8982bad8471SEric Van Hensbergen * @dentry: dentry for symlink 89973c592b9SEric Van Hensbergen * @buffer: buffer to load symlink location into 9002bad8471SEric Van Hensbergen * @buflen: length of buffer 9012bad8471SEric Van Hensbergen * 9022bad8471SEric Van Hensbergen */ 9032bad8471SEric Van Hensbergen 9042bad8471SEric Van Hensbergen static int v9fs_readlink(struct dentry *dentry, char *buffer, int buflen) 9052bad8471SEric Van Hensbergen { 906bd238fb4SLatchesar Ionkov int retval; 9072bad8471SEric Van Hensbergen 908bd238fb4SLatchesar Ionkov struct v9fs_session_info *v9ses; 909bd238fb4SLatchesar Ionkov struct p9_fid *fid; 91051a87c55SEric Van Hensbergen struct p9_wstat *st; 9112bad8471SEric Van Hensbergen 912bd238fb4SLatchesar Ionkov P9_DPRINTK(P9_DEBUG_VFS, " %s\n", dentry->d_name.name); 913bd238fb4SLatchesar Ionkov retval = -EPERM; 914bd238fb4SLatchesar Ionkov v9ses = v9fs_inode2v9ses(dentry->d_inode); 915bd238fb4SLatchesar Ionkov fid = v9fs_fid_lookup(dentry); 916da977b2cSEric Van Hensbergen if (IS_ERR(fid)) 917da977b2cSEric Van Hensbergen return PTR_ERR(fid); 9182bad8471SEric Van Hensbergen 9192405669bSLatchesar Ionkov if (!v9fs_extended(v9ses)) 920bd238fb4SLatchesar Ionkov return -EBADF; 9212bad8471SEric Van Hensbergen 922bd238fb4SLatchesar Ionkov st = p9_client_stat(fid); 923bd238fb4SLatchesar Ionkov if (IS_ERR(st)) 924bd238fb4SLatchesar Ionkov return PTR_ERR(st); 9252bad8471SEric Van Hensbergen 926bd238fb4SLatchesar Ionkov if (!(st->mode & P9_DMSYMLINK)) { 9272bad8471SEric Van Hensbergen retval = -EINVAL; 928bd238fb4SLatchesar Ionkov goto done; 9292bad8471SEric Van Hensbergen } 9302bad8471SEric Van Hensbergen 9312bad8471SEric Van Hensbergen /* copy extension buffer into buffer */ 93251a87c55SEric Van Hensbergen strncpy(buffer, st->extension, buflen); 9332bad8471SEric Van Hensbergen 934bd238fb4SLatchesar Ionkov P9_DPRINTK(P9_DEBUG_VFS, 93551a87c55SEric Van Hensbergen "%s -> %s (%s)\n", dentry->d_name.name, st->extension, buffer); 936bd238fb4SLatchesar Ionkov 9372bad8471SEric Van Hensbergen retval = buflen; 9382bad8471SEric Van Hensbergen 939bd238fb4SLatchesar Ionkov done: 940bd238fb4SLatchesar Ionkov kfree(st); 9412bad8471SEric Van Hensbergen return retval; 9422bad8471SEric Van Hensbergen } 9432bad8471SEric Van Hensbergen 9442bad8471SEric Van Hensbergen /** 9452bad8471SEric Van Hensbergen * v9fs_vfs_readlink - read a symlink's location 9462bad8471SEric Van Hensbergen * @dentry: dentry for symlink 947ee443996SEric Van Hensbergen * @buffer: buffer to load symlink location into 9482bad8471SEric Van Hensbergen * @buflen: length of buffer 9492bad8471SEric Van Hensbergen * 9502bad8471SEric Van Hensbergen */ 9512bad8471SEric Van Hensbergen 9522bad8471SEric Van Hensbergen static int v9fs_vfs_readlink(struct dentry *dentry, char __user * buffer, 9532bad8471SEric Van Hensbergen int buflen) 9542bad8471SEric Van Hensbergen { 9552bad8471SEric Van Hensbergen int retval; 9562bad8471SEric Van Hensbergen int ret; 9572bad8471SEric Van Hensbergen char *link = __getname(); 9582bad8471SEric Van Hensbergen 9590710d36aSFlorin Malita if (unlikely(!link)) 9600710d36aSFlorin Malita return -ENOMEM; 9610710d36aSFlorin Malita 962a1f9d8d2SLatchesar Ionkov if (buflen > PATH_MAX) 963a1f9d8d2SLatchesar Ionkov buflen = PATH_MAX; 9642bad8471SEric Van Hensbergen 965bd238fb4SLatchesar Ionkov P9_DPRINTK(P9_DEBUG_VFS, " dentry: %s (%p)\n", dentry->d_iname, dentry); 9662bad8471SEric Van Hensbergen 9672bad8471SEric Van Hensbergen retval = v9fs_readlink(dentry, link, buflen); 9682bad8471SEric Van Hensbergen 9692bad8471SEric Van Hensbergen if (retval > 0) { 9702bad8471SEric Van Hensbergen if ((ret = copy_to_user(buffer, link, retval)) != 0) { 971bd238fb4SLatchesar Ionkov P9_DPRINTK(P9_DEBUG_ERROR, 972bd238fb4SLatchesar Ionkov "problem copying to user: %d\n", ret); 9732bad8471SEric Van Hensbergen retval = ret; 9742bad8471SEric Van Hensbergen } 9752bad8471SEric Van Hensbergen } 9762bad8471SEric Van Hensbergen 977ce44eeb6SDavi Arnaut __putname(link); 9782bad8471SEric Van Hensbergen return retval; 9792bad8471SEric Van Hensbergen } 9802bad8471SEric Van Hensbergen 9812bad8471SEric Van Hensbergen /** 9822bad8471SEric Van Hensbergen * v9fs_vfs_follow_link - follow a symlink path 9832bad8471SEric Van Hensbergen * @dentry: dentry for symlink 9842bad8471SEric Van Hensbergen * @nd: nameidata 9852bad8471SEric Van Hensbergen * 9862bad8471SEric Van Hensbergen */ 9872bad8471SEric Van Hensbergen 9882bad8471SEric Van Hensbergen static void *v9fs_vfs_follow_link(struct dentry *dentry, struct nameidata *nd) 9892bad8471SEric Van Hensbergen { 9902bad8471SEric Van Hensbergen int len = 0; 9912bad8471SEric Van Hensbergen char *link = __getname(); 9922bad8471SEric Van Hensbergen 993bd238fb4SLatchesar Ionkov P9_DPRINTK(P9_DEBUG_VFS, "%s n", dentry->d_name.name); 9942bad8471SEric Van Hensbergen 9952bad8471SEric Van Hensbergen if (!link) 9962bad8471SEric Van Hensbergen link = ERR_PTR(-ENOMEM); 9972bad8471SEric Van Hensbergen else { 99816cce6d2SLatchesar Ionkov len = v9fs_readlink(dentry, link, PATH_MAX); 9992bad8471SEric Van Hensbergen 10002bad8471SEric Van Hensbergen if (len < 0) { 1001ce44eeb6SDavi Arnaut __putname(link); 10022bad8471SEric Van Hensbergen link = ERR_PTR(len); 10032bad8471SEric Van Hensbergen } else 10042bad8471SEric Van Hensbergen link[len] = 0; 10052bad8471SEric Van Hensbergen } 10062bad8471SEric Van Hensbergen nd_set_link(nd, link); 10072bad8471SEric Van Hensbergen 10082bad8471SEric Van Hensbergen return NULL; 10092bad8471SEric Van Hensbergen } 10102bad8471SEric Van Hensbergen 10112bad8471SEric Van Hensbergen /** 10122bad8471SEric Van Hensbergen * v9fs_vfs_put_link - release a symlink path 10132bad8471SEric Van Hensbergen * @dentry: dentry for symlink 10142bad8471SEric Van Hensbergen * @nd: nameidata 1015ee443996SEric Van Hensbergen * @p: unused 10162bad8471SEric Van Hensbergen * 10172bad8471SEric Van Hensbergen */ 10182bad8471SEric Van Hensbergen 1019ee443996SEric Van Hensbergen static void 1020ee443996SEric Van Hensbergen v9fs_vfs_put_link(struct dentry *dentry, struct nameidata *nd, void *p) 10212bad8471SEric Van Hensbergen { 10222bad8471SEric Van Hensbergen char *s = nd_get_link(nd); 10232bad8471SEric Van Hensbergen 1024bd238fb4SLatchesar Ionkov P9_DPRINTK(P9_DEBUG_VFS, " %s %s\n", dentry->d_name.name, s); 10252bad8471SEric Van Hensbergen if (!IS_ERR(s)) 1026ce44eeb6SDavi Arnaut __putname(s); 10272bad8471SEric Van Hensbergen } 10282bad8471SEric Van Hensbergen 1029ee443996SEric Van Hensbergen /** 1030ee443996SEric Van Hensbergen * v9fs_vfs_mkspecial - create a special file 1031ee443996SEric Van Hensbergen * @dir: inode to create special file in 1032ee443996SEric Van Hensbergen * @dentry: dentry to create 1033ee443996SEric Van Hensbergen * @mode: mode to create special file 1034ee443996SEric Van Hensbergen * @extension: 9p2000.u format extension string representing special file 1035ee443996SEric Van Hensbergen * 1036ee443996SEric Van Hensbergen */ 1037ee443996SEric Van Hensbergen 1038531b1094SLatchesar Ionkov static int v9fs_vfs_mkspecial(struct inode *dir, struct dentry *dentry, 1039531b1094SLatchesar Ionkov int mode, const char *extension) 1040531b1094SLatchesar Ionkov { 1041bd238fb4SLatchesar Ionkov u32 perm; 1042531b1094SLatchesar Ionkov struct v9fs_session_info *v9ses; 1043bd238fb4SLatchesar Ionkov struct p9_fid *fid; 1044531b1094SLatchesar Ionkov 10456a3124a3SLatchesar Ionkov v9ses = v9fs_inode2v9ses(dir); 10462405669bSLatchesar Ionkov if (!v9fs_extended(v9ses)) { 1047bd238fb4SLatchesar Ionkov P9_DPRINTK(P9_DEBUG_ERROR, "not extended\n"); 10486a3124a3SLatchesar Ionkov return -EPERM; 1049531b1094SLatchesar Ionkov } 1050531b1094SLatchesar Ionkov 1051da977b2cSEric Van Hensbergen perm = unixmode2p9mode(v9ses, mode); 1052bd238fb4SLatchesar Ionkov fid = v9fs_create(v9ses, dir, dentry, (char *) extension, perm, 1053bd238fb4SLatchesar Ionkov P9_OREAD); 1054bd238fb4SLatchesar Ionkov if (IS_ERR(fid)) 1055bd238fb4SLatchesar Ionkov return PTR_ERR(fid); 1056da977b2cSEric Van Hensbergen 1057bd238fb4SLatchesar Ionkov p9_client_clunk(fid); 10586a3124a3SLatchesar Ionkov return 0; 1059531b1094SLatchesar Ionkov } 1060531b1094SLatchesar Ionkov 1061531b1094SLatchesar Ionkov /** 1062531b1094SLatchesar Ionkov * v9fs_vfs_symlink - helper function to create symlinks 1063531b1094SLatchesar Ionkov * @dir: directory inode containing symlink 1064531b1094SLatchesar Ionkov * @dentry: dentry for symlink 1065531b1094SLatchesar Ionkov * @symname: symlink data 1066531b1094SLatchesar Ionkov * 1067ee443996SEric Van Hensbergen * See Also: 9P2000.u RFC for more information 1068531b1094SLatchesar Ionkov * 1069531b1094SLatchesar Ionkov */ 1070531b1094SLatchesar Ionkov 1071531b1094SLatchesar Ionkov static int 1072531b1094SLatchesar Ionkov v9fs_vfs_symlink(struct inode *dir, struct dentry *dentry, const char *symname) 1073531b1094SLatchesar Ionkov { 1074bd238fb4SLatchesar Ionkov P9_DPRINTK(P9_DEBUG_VFS, " %lu,%s,%s\n", dir->i_ino, 1075bd238fb4SLatchesar Ionkov dentry->d_name.name, symname); 1076531b1094SLatchesar Ionkov 1077531b1094SLatchesar Ionkov return v9fs_vfs_mkspecial(dir, dentry, S_IFLNK, symname); 1078531b1094SLatchesar Ionkov } 1079531b1094SLatchesar Ionkov 10802bad8471SEric Van Hensbergen /** 10812bad8471SEric Van Hensbergen * v9fs_vfs_link - create a hardlink 10822bad8471SEric Van Hensbergen * @old_dentry: dentry for file to link to 10832bad8471SEric Van Hensbergen * @dir: inode destination for new link 108473c592b9SEric Van Hensbergen * @dentry: dentry for link 10852bad8471SEric Van Hensbergen * 10862bad8471SEric Van Hensbergen */ 10872bad8471SEric Van Hensbergen 10882bad8471SEric Van Hensbergen static int 10892bad8471SEric Van Hensbergen v9fs_vfs_link(struct dentry *old_dentry, struct inode *dir, 10902bad8471SEric Van Hensbergen struct dentry *dentry) 10912bad8471SEric Van Hensbergen { 1092531b1094SLatchesar Ionkov int retval; 1093bd238fb4SLatchesar Ionkov struct p9_fid *oldfid; 1094531b1094SLatchesar Ionkov char *name; 10952bad8471SEric Van Hensbergen 1096bd238fb4SLatchesar Ionkov P9_DPRINTK(P9_DEBUG_VFS, 1097bd238fb4SLatchesar Ionkov " %lu,%s,%s\n", dir->i_ino, dentry->d_name.name, 10982bad8471SEric Van Hensbergen old_dentry->d_name.name); 10992bad8471SEric Van Hensbergen 1100da977b2cSEric Van Hensbergen oldfid = v9fs_fid_clone(old_dentry); 1101da977b2cSEric Van Hensbergen if (IS_ERR(oldfid)) 1102da977b2cSEric Van Hensbergen return PTR_ERR(oldfid); 11032bad8471SEric Van Hensbergen 1104531b1094SLatchesar Ionkov name = __getname(); 1105da977b2cSEric Van Hensbergen if (unlikely(!name)) { 1106da977b2cSEric Van Hensbergen retval = -ENOMEM; 1107da977b2cSEric Van Hensbergen goto clunk_fid; 1108da977b2cSEric Van Hensbergen } 11090710d36aSFlorin Malita 111016cce6d2SLatchesar Ionkov sprintf(name, "%d\n", oldfid->fid); 1111bd238fb4SLatchesar Ionkov retval = v9fs_vfs_mkspecial(dir, dentry, P9_DMLINK, name); 1112531b1094SLatchesar Ionkov __putname(name); 11132bad8471SEric Van Hensbergen 1114da977b2cSEric Van Hensbergen clunk_fid: 1115bd238fb4SLatchesar Ionkov p9_client_clunk(oldfid); 11162bad8471SEric Van Hensbergen return retval; 11172bad8471SEric Van Hensbergen } 11182bad8471SEric Van Hensbergen 11192bad8471SEric Van Hensbergen /** 11202bad8471SEric Van Hensbergen * v9fs_vfs_mknod - create a special file 11212bad8471SEric Van Hensbergen * @dir: inode destination for new link 11222bad8471SEric Van Hensbergen * @dentry: dentry for file 11232bad8471SEric Van Hensbergen * @mode: mode for creation 1124ee443996SEric Van Hensbergen * @rdev: device associated with special file 11252bad8471SEric Van Hensbergen * 11262bad8471SEric Van Hensbergen */ 11272bad8471SEric Van Hensbergen 11282bad8471SEric Van Hensbergen static int 11292bad8471SEric Van Hensbergen v9fs_vfs_mknod(struct inode *dir, struct dentry *dentry, int mode, dev_t rdev) 11302bad8471SEric Van Hensbergen { 1131531b1094SLatchesar Ionkov int retval; 1132531b1094SLatchesar Ionkov char *name; 11332bad8471SEric Van Hensbergen 1134bd238fb4SLatchesar Ionkov P9_DPRINTK(P9_DEBUG_VFS, 1135bd238fb4SLatchesar Ionkov " %lu,%s mode: %x MAJOR: %u MINOR: %u\n", dir->i_ino, 11362bad8471SEric Van Hensbergen dentry->d_name.name, mode, MAJOR(rdev), MINOR(rdev)); 11372bad8471SEric Van Hensbergen 1138531b1094SLatchesar Ionkov if (!new_valid_dev(rdev)) 1139531b1094SLatchesar Ionkov return -EINVAL; 114073c592b9SEric Van Hensbergen 1141531b1094SLatchesar Ionkov name = __getname(); 1142c0291a05SEugene Teo if (!name) 1143c0291a05SEugene Teo return -ENOMEM; 11442bad8471SEric Van Hensbergen /* build extension */ 11452bad8471SEric Van Hensbergen if (S_ISBLK(mode)) 1146531b1094SLatchesar Ionkov sprintf(name, "b %u %u", MAJOR(rdev), MINOR(rdev)); 11472bad8471SEric Van Hensbergen else if (S_ISCHR(mode)) 1148531b1094SLatchesar Ionkov sprintf(name, "c %u %u", MAJOR(rdev), MINOR(rdev)); 114973c592b9SEric Van Hensbergen else if (S_ISFIFO(mode)) 1150531b1094SLatchesar Ionkov *name = 0; 11512bad8471SEric Van Hensbergen else { 1152531b1094SLatchesar Ionkov __putname(name); 1153531b1094SLatchesar Ionkov return -EINVAL; 11542bad8471SEric Van Hensbergen } 11552bad8471SEric Van Hensbergen 1156531b1094SLatchesar Ionkov retval = v9fs_vfs_mkspecial(dir, dentry, mode, name); 1157531b1094SLatchesar Ionkov __putname(name); 11582bad8471SEric Van Hensbergen 11592bad8471SEric Van Hensbergen return retval; 11602bad8471SEric Van Hensbergen } 11612bad8471SEric Van Hensbergen 1162754661f1SArjan van de Ven static const struct inode_operations v9fs_dir_inode_operations_ext = { 11632bad8471SEric Van Hensbergen .create = v9fs_vfs_create, 11642bad8471SEric Van Hensbergen .lookup = v9fs_vfs_lookup, 11652bad8471SEric Van Hensbergen .symlink = v9fs_vfs_symlink, 11662bad8471SEric Van Hensbergen .link = v9fs_vfs_link, 11672bad8471SEric Van Hensbergen .unlink = v9fs_vfs_unlink, 11682bad8471SEric Van Hensbergen .mkdir = v9fs_vfs_mkdir, 11692bad8471SEric Van Hensbergen .rmdir = v9fs_vfs_rmdir, 11702bad8471SEric Van Hensbergen .mknod = v9fs_vfs_mknod, 11712bad8471SEric Van Hensbergen .rename = v9fs_vfs_rename, 11722bad8471SEric Van Hensbergen .readlink = v9fs_vfs_readlink, 11732bad8471SEric Van Hensbergen .getattr = v9fs_vfs_getattr, 11742bad8471SEric Van Hensbergen .setattr = v9fs_vfs_setattr, 11752bad8471SEric Van Hensbergen }; 11762bad8471SEric Van Hensbergen 1177754661f1SArjan van de Ven static const struct inode_operations v9fs_dir_inode_operations = { 1178b501611aSEric Van Hensbergen .create = v9fs_vfs_create, 1179b501611aSEric Van Hensbergen .lookup = v9fs_vfs_lookup, 1180b501611aSEric Van Hensbergen .unlink = v9fs_vfs_unlink, 1181b501611aSEric Van Hensbergen .mkdir = v9fs_vfs_mkdir, 1182b501611aSEric Van Hensbergen .rmdir = v9fs_vfs_rmdir, 1183b501611aSEric Van Hensbergen .mknod = v9fs_vfs_mknod, 1184b501611aSEric Van Hensbergen .rename = v9fs_vfs_rename, 1185b501611aSEric Van Hensbergen .getattr = v9fs_vfs_getattr, 1186b501611aSEric Van Hensbergen .setattr = v9fs_vfs_setattr, 1187b501611aSEric Van Hensbergen }; 1188b501611aSEric Van Hensbergen 1189754661f1SArjan van de Ven static const struct inode_operations v9fs_file_inode_operations = { 11902bad8471SEric Van Hensbergen .getattr = v9fs_vfs_getattr, 11912bad8471SEric Van Hensbergen .setattr = v9fs_vfs_setattr, 11922bad8471SEric Van Hensbergen }; 11932bad8471SEric Van Hensbergen 1194754661f1SArjan van de Ven static const struct inode_operations v9fs_symlink_inode_operations = { 11952bad8471SEric Van Hensbergen .readlink = v9fs_vfs_readlink, 11962bad8471SEric Van Hensbergen .follow_link = v9fs_vfs_follow_link, 11972bad8471SEric Van Hensbergen .put_link = v9fs_vfs_put_link, 11982bad8471SEric Van Hensbergen .getattr = v9fs_vfs_getattr, 11992bad8471SEric Van Hensbergen .setattr = v9fs_vfs_setattr, 12002bad8471SEric Van Hensbergen }; 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