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 102bad8471SEric Van Hensbergen * it under the terms of the GNU General Public License as published by 112bad8471SEric Van Hensbergen * the Free Software Foundation; either version 2 of the License, or 122bad8471SEric Van Hensbergen * (at your option) any later version. 132bad8471SEric Van Hensbergen * 142bad8471SEric Van Hensbergen * This program is distributed in the hope that it will be useful, 152bad8471SEric Van Hensbergen * but WITHOUT ANY WARRANTY; without even the implied warranty of 162bad8471SEric Van Hensbergen * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 172bad8471SEric Van Hensbergen * GNU General Public License for more details. 182bad8471SEric Van Hensbergen * 192bad8471SEric Van Hensbergen * You should have received a copy of the GNU General Public License 202bad8471SEric Van Hensbergen * along with this program; if not, write to: 212bad8471SEric Van Hensbergen * Free Software Foundation 222bad8471SEric Van Hensbergen * 51 Franklin Street, Fifth Floor 232bad8471SEric Van Hensbergen * Boston, MA 02111-1301 USA 242bad8471SEric Van Hensbergen * 252bad8471SEric Van Hensbergen */ 262bad8471SEric Van Hensbergen 272bad8471SEric Van Hensbergen #include <linux/module.h> 282bad8471SEric Van Hensbergen #include <linux/errno.h> 292bad8471SEric Van Hensbergen #include <linux/fs.h> 302bad8471SEric Van Hensbergen #include <linux/file.h> 312bad8471SEric Van Hensbergen #include <linux/pagemap.h> 322bad8471SEric Van Hensbergen #include <linux/stat.h> 332bad8471SEric Van Hensbergen #include <linux/string.h> 342bad8471SEric Van Hensbergen #include <linux/smp_lock.h> 352bad8471SEric Van Hensbergen #include <linux/inet.h> 362bad8471SEric Van Hensbergen #include <linux/namei.h> 372bad8471SEric Van Hensbergen #include <linux/idr.h> 382bad8471SEric Van Hensbergen 392bad8471SEric Van Hensbergen #include "debug.h" 402bad8471SEric Van Hensbergen #include "v9fs.h" 412bad8471SEric Van Hensbergen #include "9p.h" 422bad8471SEric Van Hensbergen #include "v9fs_vfs.h" 432bad8471SEric Van Hensbergen #include "fid.h" 442bad8471SEric Van Hensbergen 452bad8471SEric Van Hensbergen static struct inode_operations v9fs_dir_inode_operations; 46b501611aSEric Van Hensbergen static struct inode_operations v9fs_dir_inode_operations_ext; 472bad8471SEric Van Hensbergen static struct inode_operations v9fs_file_inode_operations; 482bad8471SEric Van Hensbergen static struct inode_operations v9fs_symlink_inode_operations; 492bad8471SEric Van Hensbergen 502bad8471SEric Van Hensbergen /** 512bad8471SEric Van Hensbergen * unixmode2p9mode - convert unix mode bits to plan 9 522bad8471SEric Van Hensbergen * @v9ses: v9fs session information 532bad8471SEric Van Hensbergen * @mode: mode to convert 542bad8471SEric Van Hensbergen * 552bad8471SEric Van Hensbergen */ 562bad8471SEric Van Hensbergen 5773c592b9SEric Van Hensbergen static int unixmode2p9mode(struct v9fs_session_info *v9ses, int mode) 582bad8471SEric Van Hensbergen { 592bad8471SEric Van Hensbergen int res; 602bad8471SEric Van Hensbergen res = mode & 0777; 612bad8471SEric Van Hensbergen if (S_ISDIR(mode)) 622bad8471SEric Van Hensbergen res |= V9FS_DMDIR; 632bad8471SEric Van Hensbergen if (v9ses->extended) { 642bad8471SEric Van Hensbergen if (S_ISLNK(mode)) 652bad8471SEric Van Hensbergen res |= V9FS_DMSYMLINK; 662bad8471SEric Van Hensbergen if (v9ses->nodev == 0) { 672bad8471SEric Van Hensbergen if (S_ISSOCK(mode)) 682bad8471SEric Van Hensbergen res |= V9FS_DMSOCKET; 692bad8471SEric Van Hensbergen if (S_ISFIFO(mode)) 702bad8471SEric Van Hensbergen res |= V9FS_DMNAMEDPIPE; 712bad8471SEric Van Hensbergen if (S_ISBLK(mode)) 722bad8471SEric Van Hensbergen res |= V9FS_DMDEVICE; 732bad8471SEric Van Hensbergen if (S_ISCHR(mode)) 742bad8471SEric Van Hensbergen res |= V9FS_DMDEVICE; 752bad8471SEric Van Hensbergen } 762bad8471SEric Van Hensbergen 772bad8471SEric Van Hensbergen if ((mode & S_ISUID) == S_ISUID) 782bad8471SEric Van Hensbergen res |= V9FS_DMSETUID; 792bad8471SEric Van Hensbergen if ((mode & S_ISGID) == S_ISGID) 802bad8471SEric Van Hensbergen res |= V9FS_DMSETGID; 812bad8471SEric Van Hensbergen if ((mode & V9FS_DMLINK)) 822bad8471SEric Van Hensbergen res |= V9FS_DMLINK; 832bad8471SEric Van Hensbergen } 842bad8471SEric Van Hensbergen 852bad8471SEric Van Hensbergen return res; 862bad8471SEric Van Hensbergen } 872bad8471SEric Van Hensbergen 882bad8471SEric Van Hensbergen /** 892bad8471SEric Van Hensbergen * p9mode2unixmode- convert plan9 mode bits to unix mode bits 902bad8471SEric Van Hensbergen * @v9ses: v9fs session information 912bad8471SEric Van Hensbergen * @mode: mode to convert 922bad8471SEric Van Hensbergen * 932bad8471SEric Van Hensbergen */ 942bad8471SEric Van Hensbergen 9573c592b9SEric Van Hensbergen static int p9mode2unixmode(struct v9fs_session_info *v9ses, int mode) 962bad8471SEric Van Hensbergen { 972bad8471SEric Van Hensbergen int res; 982bad8471SEric Van Hensbergen 992bad8471SEric Van Hensbergen res = mode & 0777; 1002bad8471SEric Van Hensbergen 1012bad8471SEric Van Hensbergen if ((mode & V9FS_DMDIR) == V9FS_DMDIR) 1022bad8471SEric Van Hensbergen res |= S_IFDIR; 1032bad8471SEric Van Hensbergen else if ((mode & V9FS_DMSYMLINK) && (v9ses->extended)) 1042bad8471SEric Van Hensbergen res |= S_IFLNK; 1052bad8471SEric Van Hensbergen else if ((mode & V9FS_DMSOCKET) && (v9ses->extended) 1062bad8471SEric Van Hensbergen && (v9ses->nodev == 0)) 1072bad8471SEric Van Hensbergen res |= S_IFSOCK; 1082bad8471SEric Van Hensbergen else if ((mode & V9FS_DMNAMEDPIPE) && (v9ses->extended) 1092bad8471SEric Van Hensbergen && (v9ses->nodev == 0)) 1102bad8471SEric Van Hensbergen res |= S_IFIFO; 1112bad8471SEric Van Hensbergen else if ((mode & V9FS_DMDEVICE) && (v9ses->extended) 1122bad8471SEric Van Hensbergen && (v9ses->nodev == 0)) 1132bad8471SEric Van Hensbergen res |= S_IFBLK; 1142bad8471SEric Van Hensbergen else 1152bad8471SEric Van Hensbergen res |= S_IFREG; 1162bad8471SEric Van Hensbergen 1172bad8471SEric Van Hensbergen if (v9ses->extended) { 1182bad8471SEric Van Hensbergen if ((mode & V9FS_DMSETUID) == V9FS_DMSETUID) 1192bad8471SEric Van Hensbergen res |= S_ISUID; 1202bad8471SEric Van Hensbergen 1212bad8471SEric Van Hensbergen if ((mode & V9FS_DMSETGID) == V9FS_DMSETGID) 1222bad8471SEric Van Hensbergen res |= S_ISGID; 1232bad8471SEric Van Hensbergen } 1242bad8471SEric Van Hensbergen 1252bad8471SEric Van Hensbergen return res; 1262bad8471SEric Van Hensbergen } 1272bad8471SEric Van Hensbergen 1286a3124a3SLatchesar Ionkov int v9fs_uflags2omode(int uflags) 1296a3124a3SLatchesar Ionkov { 1306a3124a3SLatchesar Ionkov int ret; 1316a3124a3SLatchesar Ionkov 1326a3124a3SLatchesar Ionkov ret = 0; 1336a3124a3SLatchesar Ionkov switch (uflags&3) { 1346a3124a3SLatchesar Ionkov default: 1356a3124a3SLatchesar Ionkov case O_RDONLY: 1366a3124a3SLatchesar Ionkov ret = V9FS_OREAD; 1376a3124a3SLatchesar Ionkov break; 1386a3124a3SLatchesar Ionkov 1396a3124a3SLatchesar Ionkov case O_WRONLY: 1406a3124a3SLatchesar Ionkov ret = V9FS_OWRITE; 1416a3124a3SLatchesar Ionkov break; 1426a3124a3SLatchesar Ionkov 1436a3124a3SLatchesar Ionkov case O_RDWR: 1446a3124a3SLatchesar Ionkov ret = V9FS_ORDWR; 1456a3124a3SLatchesar Ionkov break; 1466a3124a3SLatchesar Ionkov } 1476a3124a3SLatchesar Ionkov 1486a3124a3SLatchesar Ionkov if (uflags & O_EXCL) 1496a3124a3SLatchesar Ionkov ret |= V9FS_OEXCL; 1506a3124a3SLatchesar Ionkov 1516a3124a3SLatchesar Ionkov if (uflags & O_TRUNC) 1526a3124a3SLatchesar Ionkov ret |= V9FS_OTRUNC; 1536a3124a3SLatchesar Ionkov 1546a3124a3SLatchesar Ionkov if (uflags & O_APPEND) 1556a3124a3SLatchesar Ionkov ret |= V9FS_OAPPEND; 1566a3124a3SLatchesar Ionkov 1576a3124a3SLatchesar Ionkov return ret; 1586a3124a3SLatchesar Ionkov } 1596a3124a3SLatchesar Ionkov 1602bad8471SEric Van Hensbergen /** 161531b1094SLatchesar Ionkov * v9fs_blank_wstat - helper function to setup a 9P stat structure 1622bad8471SEric Van Hensbergen * @v9ses: 9P session info (for determining extended mode) 163531b1094SLatchesar Ionkov * @wstat: structure to initialize 1642bad8471SEric Van Hensbergen * 1652bad8471SEric Van Hensbergen */ 1662bad8471SEric Van Hensbergen 16773c592b9SEric Van Hensbergen static void 168531b1094SLatchesar Ionkov v9fs_blank_wstat(struct v9fs_wstat *wstat) 1692bad8471SEric Van Hensbergen { 170531b1094SLatchesar Ionkov wstat->type = ~0; 171531b1094SLatchesar Ionkov wstat->dev = ~0; 172531b1094SLatchesar Ionkov wstat->qid.type = ~0; 173531b1094SLatchesar Ionkov wstat->qid.version = ~0; 174531b1094SLatchesar Ionkov *((long long *)&wstat->qid.path) = ~0; 175531b1094SLatchesar Ionkov wstat->mode = ~0; 176531b1094SLatchesar Ionkov wstat->atime = ~0; 177531b1094SLatchesar Ionkov wstat->mtime = ~0; 178531b1094SLatchesar Ionkov wstat->length = ~0; 179531b1094SLatchesar Ionkov wstat->name = NULL; 180531b1094SLatchesar Ionkov wstat->uid = NULL; 181531b1094SLatchesar Ionkov wstat->gid = NULL; 182531b1094SLatchesar Ionkov wstat->muid = NULL; 183531b1094SLatchesar Ionkov wstat->n_uid = ~0; 184531b1094SLatchesar Ionkov wstat->n_gid = ~0; 185531b1094SLatchesar Ionkov wstat->n_muid = ~0; 186531b1094SLatchesar Ionkov wstat->extension = NULL; 1872bad8471SEric Van Hensbergen } 1882bad8471SEric Van Hensbergen 1892bad8471SEric Van Hensbergen /** 1902bad8471SEric Van Hensbergen * v9fs_get_inode - helper function to setup an inode 1912bad8471SEric Van Hensbergen * @sb: superblock 1922bad8471SEric Van Hensbergen * @mode: mode to setup inode with 1932bad8471SEric Van Hensbergen * 1942bad8471SEric Van Hensbergen */ 1952bad8471SEric Van Hensbergen 1962bad8471SEric Van Hensbergen struct inode *v9fs_get_inode(struct super_block *sb, int mode) 1972bad8471SEric Van Hensbergen { 1986a3124a3SLatchesar Ionkov struct inode *inode; 199b501611aSEric Van Hensbergen struct v9fs_session_info *v9ses = sb->s_fs_info; 2002bad8471SEric Van Hensbergen 2012bad8471SEric Van Hensbergen dprintk(DEBUG_VFS, "super block: %p mode: %o\n", sb, mode); 2022bad8471SEric Van Hensbergen 2032bad8471SEric Van Hensbergen inode = new_inode(sb); 2042bad8471SEric Van Hensbergen if (inode) { 2052bad8471SEric Van Hensbergen inode->i_mode = mode; 2062bad8471SEric Van Hensbergen inode->i_uid = current->fsuid; 2072bad8471SEric Van Hensbergen inode->i_gid = current->fsgid; 2082bad8471SEric Van Hensbergen inode->i_blksize = sb->s_blocksize; 2092bad8471SEric Van Hensbergen inode->i_blocks = 0; 2102bad8471SEric Van Hensbergen inode->i_rdev = 0; 2112bad8471SEric Van Hensbergen inode->i_atime = inode->i_mtime = inode->i_ctime = CURRENT_TIME; 212147b31cfSEric Van Hensbergen inode->i_mapping->a_ops = &v9fs_addr_operations; 2132bad8471SEric Van Hensbergen 2142bad8471SEric Van Hensbergen switch (mode & S_IFMT) { 2152bad8471SEric Van Hensbergen case S_IFIFO: 2162bad8471SEric Van Hensbergen case S_IFBLK: 2172bad8471SEric Van Hensbergen case S_IFCHR: 2182bad8471SEric Van Hensbergen case S_IFSOCK: 219b501611aSEric Van Hensbergen if(!v9ses->extended) { 220b501611aSEric Van Hensbergen dprintk(DEBUG_ERROR, "special files without extended mode\n"); 221b501611aSEric Van Hensbergen return ERR_PTR(-EINVAL); 222b501611aSEric Van Hensbergen } 2235d58bec5SEric Van Hensbergen init_special_inode(inode, inode->i_mode, 2245d58bec5SEric Van Hensbergen inode->i_rdev); 2255d58bec5SEric Van Hensbergen break; 2262bad8471SEric Van Hensbergen case S_IFREG: 2272bad8471SEric Van Hensbergen inode->i_op = &v9fs_file_inode_operations; 2282bad8471SEric Van Hensbergen inode->i_fop = &v9fs_file_operations; 2292bad8471SEric Van Hensbergen break; 230b501611aSEric Van Hensbergen case S_IFLNK: 231b501611aSEric Van Hensbergen if(!v9ses->extended) { 232b501611aSEric Van Hensbergen dprintk(DEBUG_ERROR, "extended modes used w/o 9P2000.u\n"); 233b501611aSEric Van Hensbergen return ERR_PTR(-EINVAL); 234b501611aSEric Van Hensbergen } 235b501611aSEric Van Hensbergen inode->i_op = &v9fs_symlink_inode_operations; 236b501611aSEric Van Hensbergen break; 2372bad8471SEric Van Hensbergen case S_IFDIR: 2382bad8471SEric Van Hensbergen inode->i_nlink++; 239b501611aSEric Van Hensbergen if(v9ses->extended) 240b501611aSEric Van Hensbergen inode->i_op = &v9fs_dir_inode_operations_ext; 241b501611aSEric Van Hensbergen else 2422bad8471SEric Van Hensbergen inode->i_op = &v9fs_dir_inode_operations; 2432bad8471SEric Van Hensbergen inode->i_fop = &v9fs_dir_operations; 2442bad8471SEric Van Hensbergen break; 2452bad8471SEric Van Hensbergen default: 2462bad8471SEric Van Hensbergen dprintk(DEBUG_ERROR, "BAD mode 0x%x S_IFMT 0x%x\n", 2472bad8471SEric Van Hensbergen mode, mode & S_IFMT); 2482bad8471SEric Van Hensbergen return ERR_PTR(-EINVAL); 2492bad8471SEric Van Hensbergen } 2502bad8471SEric Van Hensbergen } else { 2512bad8471SEric Van Hensbergen eprintk(KERN_WARNING, "Problem allocating inode\n"); 2522bad8471SEric Van Hensbergen return ERR_PTR(-ENOMEM); 2532bad8471SEric Van Hensbergen } 2542bad8471SEric Van Hensbergen return inode; 2552bad8471SEric Van Hensbergen } 2562bad8471SEric Van Hensbergen 2572bad8471SEric Van Hensbergen static int 25816cce6d2SLatchesar Ionkov v9fs_create(struct v9fs_session_info *v9ses, u32 pfid, char *name, u32 perm, 25916cce6d2SLatchesar Ionkov u8 mode, char *extension, u32 *fidp, struct v9fs_qid *qid, u32 *iounit) 2602bad8471SEric Van Hensbergen { 2616a3124a3SLatchesar Ionkov u32 fid; 2623cf6429aSLatchesar Ionkov int err; 2636a3124a3SLatchesar Ionkov struct v9fs_fcall *fcall; 2642bad8471SEric Van Hensbergen 2656a3124a3SLatchesar Ionkov fid = v9fs_get_idpool(&v9ses->fidpool); 2666a3124a3SLatchesar Ionkov if (fid < 0) { 2672bad8471SEric Van Hensbergen eprintk(KERN_WARNING, "no free fids available\n"); 268731805b4SLatchesar Ionkov return -ENOSPC; 2692bad8471SEric Van Hensbergen } 2702bad8471SEric Van Hensbergen 2716a3124a3SLatchesar Ionkov err = v9fs_t_walk(v9ses, pfid, fid, NULL, &fcall); 2726a3124a3SLatchesar Ionkov if (err < 0) { 273531b1094SLatchesar Ionkov PRINT_FCALL_ERROR("clone error", fcall); 27416cce6d2SLatchesar Ionkov goto put_fid; 2752bad8471SEric Van Hensbergen } 2762bad8471SEric Van Hensbergen kfree(fcall); 2772bad8471SEric Van Hensbergen 27816cce6d2SLatchesar Ionkov err = v9fs_t_create(v9ses, fid, name, perm, mode, extension, &fcall); 2796a3124a3SLatchesar Ionkov if (err < 0) { 280531b1094SLatchesar Ionkov PRINT_FCALL_ERROR("create fails", fcall); 28116cce6d2SLatchesar Ionkov goto clunk_fid; 2822bad8471SEric Van Hensbergen } 2832bad8471SEric Van Hensbergen 2846a3124a3SLatchesar Ionkov if (iounit) 2856a3124a3SLatchesar Ionkov *iounit = fcall->params.rcreate.iounit; 2866a3124a3SLatchesar Ionkov 2876a3124a3SLatchesar Ionkov if (qid) 2886a3124a3SLatchesar Ionkov *qid = fcall->params.rcreate.qid; 2896a3124a3SLatchesar Ionkov 2906a3124a3SLatchesar Ionkov if (fidp) 2916a3124a3SLatchesar Ionkov *fidp = fid; 2926a3124a3SLatchesar Ionkov 2932bad8471SEric Van Hensbergen kfree(fcall); 2946a3124a3SLatchesar Ionkov return 0; 2952bad8471SEric Van Hensbergen 29616cce6d2SLatchesar Ionkov clunk_fid: 29716cce6d2SLatchesar Ionkov v9fs_t_clunk(v9ses, fid); 29816cce6d2SLatchesar Ionkov fid = V9FS_NOFID; 29916cce6d2SLatchesar Ionkov 30016cce6d2SLatchesar Ionkov put_fid: 3016a3124a3SLatchesar Ionkov if (fid >= 0) 3026a3124a3SLatchesar Ionkov v9fs_put_idpool(fid, &v9ses->fidpool); 3036a3124a3SLatchesar Ionkov 3046a3124a3SLatchesar Ionkov kfree(fcall); 3056a3124a3SLatchesar Ionkov return err; 3062bad8471SEric Van Hensbergen } 3072bad8471SEric Van Hensbergen 3086a3124a3SLatchesar Ionkov static struct v9fs_fid* 3096a3124a3SLatchesar Ionkov v9fs_clone_walk(struct v9fs_session_info *v9ses, u32 fid, struct dentry *dentry) 3106a3124a3SLatchesar Ionkov { 3116a3124a3SLatchesar Ionkov int err; 3126a3124a3SLatchesar Ionkov u32 nfid; 3136a3124a3SLatchesar Ionkov struct v9fs_fid *ret; 3146a3124a3SLatchesar Ionkov struct v9fs_fcall *fcall; 3150b8dd177SLatchesar Ionkov 3166a3124a3SLatchesar Ionkov nfid = v9fs_get_idpool(&v9ses->fidpool); 3176a3124a3SLatchesar Ionkov if (nfid < 0) { 3180b8dd177SLatchesar Ionkov eprintk(KERN_WARNING, "no free fids available\n"); 319731805b4SLatchesar Ionkov return ERR_PTR(-ENOSPC); 3200b8dd177SLatchesar Ionkov } 3210b8dd177SLatchesar Ionkov 3226a3124a3SLatchesar Ionkov err = v9fs_t_walk(v9ses, fid, nfid, (char *) dentry->d_name.name, 3236a3124a3SLatchesar Ionkov &fcall); 3246a3124a3SLatchesar Ionkov 3256a3124a3SLatchesar Ionkov if (err < 0) { 3266a3124a3SLatchesar Ionkov PRINT_FCALL_ERROR("walk error", fcall); 3276a3124a3SLatchesar Ionkov v9fs_put_idpool(nfid, &v9ses->fidpool); 3286a3124a3SLatchesar Ionkov goto error; 3290b8dd177SLatchesar Ionkov } 3306a3124a3SLatchesar Ionkov 3313cf6429aSLatchesar Ionkov kfree(fcall); 3323cf6429aSLatchesar Ionkov fcall = NULL; 3336a3124a3SLatchesar Ionkov ret = v9fs_fid_create(v9ses, nfid); 3346a3124a3SLatchesar Ionkov if (!ret) { 3356a3124a3SLatchesar Ionkov err = -ENOMEM; 3366a3124a3SLatchesar Ionkov goto clunk_fid; 3370b8dd177SLatchesar Ionkov } 3382bad8471SEric Van Hensbergen 3396a3124a3SLatchesar Ionkov err = v9fs_fid_insert(ret, dentry); 3406a3124a3SLatchesar Ionkov if (err < 0) { 3416a3124a3SLatchesar Ionkov v9fs_fid_destroy(ret); 3426a3124a3SLatchesar Ionkov goto clunk_fid; 3436a3124a3SLatchesar Ionkov } 3442bad8471SEric Van Hensbergen 3456a3124a3SLatchesar Ionkov return ret; 3466a3124a3SLatchesar Ionkov 3476a3124a3SLatchesar Ionkov clunk_fid: 3486a3124a3SLatchesar Ionkov v9fs_t_clunk(v9ses, nfid); 3496a3124a3SLatchesar Ionkov 3506a3124a3SLatchesar Ionkov error: 3516a3124a3SLatchesar Ionkov kfree(fcall); 3526a3124a3SLatchesar Ionkov return ERR_PTR(err); 3536a3124a3SLatchesar Ionkov } 3546a3124a3SLatchesar Ionkov 3555174fdabSLatchesar Ionkov static struct inode * 3566a3124a3SLatchesar Ionkov v9fs_inode_from_fid(struct v9fs_session_info *v9ses, u32 fid, 3576a3124a3SLatchesar Ionkov struct super_block *sb) 3586a3124a3SLatchesar Ionkov { 3596a3124a3SLatchesar Ionkov int err, umode; 3606a3124a3SLatchesar Ionkov struct inode *ret; 3616a3124a3SLatchesar Ionkov struct v9fs_fcall *fcall; 3626a3124a3SLatchesar Ionkov 3636a3124a3SLatchesar Ionkov ret = NULL; 3646a3124a3SLatchesar Ionkov err = v9fs_t_stat(v9ses, fid, &fcall); 3656a3124a3SLatchesar Ionkov if (err) { 366531b1094SLatchesar Ionkov PRINT_FCALL_ERROR("stat error", fcall); 3676a3124a3SLatchesar Ionkov goto error; 3682bad8471SEric Van Hensbergen } 3692bad8471SEric Van Hensbergen 3706a3124a3SLatchesar Ionkov umode = p9mode2unixmode(v9ses, fcall->params.rstat.stat.mode); 3716a3124a3SLatchesar Ionkov ret = v9fs_get_inode(sb, umode); 3726a3124a3SLatchesar Ionkov if (IS_ERR(ret)) { 3736a3124a3SLatchesar Ionkov err = PTR_ERR(ret); 3746a3124a3SLatchesar Ionkov ret = NULL; 3756a3124a3SLatchesar Ionkov goto error; 3762bad8471SEric Van Hensbergen } 3772bad8471SEric Van Hensbergen 3786a3124a3SLatchesar Ionkov v9fs_stat2inode(&fcall->params.rstat.stat, ret, sb); 3792bad8471SEric Van Hensbergen kfree(fcall); 3806a3124a3SLatchesar Ionkov return ret; 3812bad8471SEric Van Hensbergen 3826a3124a3SLatchesar Ionkov error: 3832bad8471SEric Van Hensbergen kfree(fcall); 3846a3124a3SLatchesar Ionkov if (ret) 3856a3124a3SLatchesar Ionkov iput(ret); 3862bad8471SEric Van Hensbergen 3876a3124a3SLatchesar Ionkov return ERR_PTR(err); 3882bad8471SEric Van Hensbergen } 3892bad8471SEric Van Hensbergen 3902bad8471SEric Van Hensbergen /** 3912bad8471SEric Van Hensbergen * v9fs_remove - helper function to remove files and directories 39273c592b9SEric Van Hensbergen * @dir: directory inode that is being deleted 39373c592b9SEric Van Hensbergen * @file: dentry that is being deleted 39473c592b9SEric Van Hensbergen * @rmdir: removing a directory 3952bad8471SEric Van Hensbergen * 3962bad8471SEric Van Hensbergen */ 3972bad8471SEric Van Hensbergen 3982bad8471SEric Van Hensbergen static int v9fs_remove(struct inode *dir, struct dentry *file, int rmdir) 3992bad8471SEric Van Hensbergen { 4002bad8471SEric Van Hensbergen struct v9fs_fcall *fcall = NULL; 4012bad8471SEric Van Hensbergen struct super_block *sb = NULL; 4022bad8471SEric Van Hensbergen struct v9fs_session_info *v9ses = NULL; 4032bad8471SEric Van Hensbergen struct v9fs_fid *v9fid = NULL; 4042bad8471SEric Van Hensbergen struct inode *file_inode = NULL; 4052bad8471SEric Van Hensbergen int fid = -1; 4062bad8471SEric Van Hensbergen int result = 0; 4072bad8471SEric Van Hensbergen 4082bad8471SEric Van Hensbergen dprintk(DEBUG_VFS, "inode: %p dentry: %p rmdir: %d\n", dir, file, 4092bad8471SEric Van Hensbergen rmdir); 4102bad8471SEric Van Hensbergen 4112bad8471SEric Van Hensbergen file_inode = file->d_inode; 4122bad8471SEric Van Hensbergen sb = file_inode->i_sb; 4132bad8471SEric Van Hensbergen v9ses = v9fs_inode2v9ses(file_inode); 4140b8dd177SLatchesar Ionkov v9fid = v9fs_fid_lookup(file); 4152bad8471SEric Van Hensbergen 4162bad8471SEric Van Hensbergen if (!v9fid) { 4172bad8471SEric Van Hensbergen dprintk(DEBUG_ERROR, 4182bad8471SEric Van Hensbergen "no v9fs_fid\n"); 4192bad8471SEric Van Hensbergen return -EBADF; 4202bad8471SEric Van Hensbergen } 4212bad8471SEric Van Hensbergen 4222bad8471SEric Van Hensbergen fid = v9fid->fid; 4232bad8471SEric Van Hensbergen if (fid < 0) { 4242bad8471SEric Van Hensbergen dprintk(DEBUG_ERROR, "inode #%lu, no fid!\n", 4252bad8471SEric Van Hensbergen file_inode->i_ino); 4262bad8471SEric Van Hensbergen return -EBADF; 4272bad8471SEric Van Hensbergen } 4282bad8471SEric Van Hensbergen 4292bad8471SEric Van Hensbergen result = v9fs_t_remove(v9ses, fid, &fcall); 430531b1094SLatchesar Ionkov if (result < 0) { 431531b1094SLatchesar Ionkov PRINT_FCALL_ERROR("remove fails", fcall); 432531b1094SLatchesar Ionkov } else { 4332bad8471SEric Van Hensbergen v9fs_put_idpool(fid, &v9ses->fidpool); 4342bad8471SEric Van Hensbergen v9fs_fid_destroy(v9fid); 4352bad8471SEric Van Hensbergen } 4362bad8471SEric Van Hensbergen 4372bad8471SEric Van Hensbergen kfree(fcall); 4382bad8471SEric Van Hensbergen return result; 4392bad8471SEric Van Hensbergen } 4402bad8471SEric Van Hensbergen 4416a3124a3SLatchesar Ionkov static int 4426a3124a3SLatchesar Ionkov v9fs_open_created(struct inode *inode, struct file *file) 4436a3124a3SLatchesar Ionkov { 4446a3124a3SLatchesar Ionkov return 0; 4456a3124a3SLatchesar Ionkov } 4466a3124a3SLatchesar Ionkov 4472bad8471SEric Van Hensbergen /** 4482bad8471SEric Van Hensbergen * v9fs_vfs_create - VFS hook to create files 4492bad8471SEric Van Hensbergen * @inode: directory inode that is being deleted 4502bad8471SEric Van Hensbergen * @dentry: dentry that is being deleted 4516a3124a3SLatchesar Ionkov * @mode: create permissions 4522bad8471SEric Van Hensbergen * @nd: path information 4532bad8471SEric Van Hensbergen * 4542bad8471SEric Van Hensbergen */ 4552bad8471SEric Van Hensbergen 4562bad8471SEric Van Hensbergen static int 4576a3124a3SLatchesar Ionkov v9fs_vfs_create(struct inode *dir, struct dentry *dentry, int mode, 4582bad8471SEric Van Hensbergen struct nameidata *nd) 4592bad8471SEric Van Hensbergen { 4606a3124a3SLatchesar Ionkov int err; 4616a3124a3SLatchesar Ionkov u32 fid, perm, iounit; 4626a3124a3SLatchesar Ionkov int flags; 4636a3124a3SLatchesar Ionkov struct v9fs_session_info *v9ses; 4646a3124a3SLatchesar Ionkov struct v9fs_fid *dfid, *vfid, *ffid; 4656a3124a3SLatchesar Ionkov struct inode *inode; 4666a3124a3SLatchesar Ionkov struct v9fs_qid qid; 4676a3124a3SLatchesar Ionkov struct file *filp; 4686a3124a3SLatchesar Ionkov 4696a3124a3SLatchesar Ionkov inode = NULL; 4706a3124a3SLatchesar Ionkov vfid = NULL; 4716a3124a3SLatchesar Ionkov v9ses = v9fs_inode2v9ses(dir); 4726a3124a3SLatchesar Ionkov dfid = v9fs_fid_lookup(dentry->d_parent); 4736a3124a3SLatchesar Ionkov perm = unixmode2p9mode(v9ses, mode); 4746a3124a3SLatchesar Ionkov 4756a3124a3SLatchesar Ionkov if (nd && nd->flags & LOOKUP_OPEN) 4766a3124a3SLatchesar Ionkov flags = nd->intent.open.flags - 1; 4776a3124a3SLatchesar Ionkov else 4786a3124a3SLatchesar Ionkov flags = O_RDWR; 4796a3124a3SLatchesar Ionkov 4806a3124a3SLatchesar Ionkov err = v9fs_create(v9ses, dfid->fid, (char *) dentry->d_name.name, 48116cce6d2SLatchesar Ionkov perm, v9fs_uflags2omode(flags), NULL, &fid, &qid, &iounit); 4826a3124a3SLatchesar Ionkov 4836a3124a3SLatchesar Ionkov if (err) 4846a3124a3SLatchesar Ionkov goto error; 4856a3124a3SLatchesar Ionkov 4866a3124a3SLatchesar Ionkov vfid = v9fs_clone_walk(v9ses, dfid->fid, dentry); 4876a3124a3SLatchesar Ionkov if (IS_ERR(vfid)) { 4886a3124a3SLatchesar Ionkov err = PTR_ERR(vfid); 4896a3124a3SLatchesar Ionkov vfid = NULL; 4906a3124a3SLatchesar Ionkov goto error; 4916a3124a3SLatchesar Ionkov } 4926a3124a3SLatchesar Ionkov 4936a3124a3SLatchesar Ionkov inode = v9fs_inode_from_fid(v9ses, vfid->fid, dir->i_sb); 4946a3124a3SLatchesar Ionkov if (IS_ERR(inode)) { 4956a3124a3SLatchesar Ionkov err = PTR_ERR(inode); 4966a3124a3SLatchesar Ionkov inode = NULL; 4976a3124a3SLatchesar Ionkov goto error; 4986a3124a3SLatchesar Ionkov } 4996a3124a3SLatchesar Ionkov 5006a3124a3SLatchesar Ionkov dentry->d_op = &v9fs_dentry_operations; 5016a3124a3SLatchesar Ionkov d_instantiate(dentry, inode); 5026a3124a3SLatchesar Ionkov 5036a3124a3SLatchesar Ionkov if (nd && nd->flags & LOOKUP_OPEN) { 5046a3124a3SLatchesar Ionkov ffid = v9fs_fid_create(v9ses, fid); 5056a3124a3SLatchesar Ionkov if (!ffid) 5066a3124a3SLatchesar Ionkov return -ENOMEM; 5076a3124a3SLatchesar Ionkov 5086a3124a3SLatchesar Ionkov filp = lookup_instantiate_filp(nd, dentry, v9fs_open_created); 5096a3124a3SLatchesar Ionkov if (IS_ERR(filp)) { 5106a3124a3SLatchesar Ionkov v9fs_fid_destroy(ffid); 5116a3124a3SLatchesar Ionkov return PTR_ERR(filp); 5126a3124a3SLatchesar Ionkov } 5136a3124a3SLatchesar Ionkov 5146a3124a3SLatchesar Ionkov ffid->rdir_pos = 0; 5156a3124a3SLatchesar Ionkov ffid->rdir_fcall = NULL; 5166a3124a3SLatchesar Ionkov ffid->fidopen = 1; 5176a3124a3SLatchesar Ionkov ffid->iounit = iounit; 5186a3124a3SLatchesar Ionkov ffid->filp = filp; 5196a3124a3SLatchesar Ionkov filp->private_data = ffid; 5206a3124a3SLatchesar Ionkov } 5216a3124a3SLatchesar Ionkov 5226a3124a3SLatchesar Ionkov return 0; 5236a3124a3SLatchesar Ionkov 5246a3124a3SLatchesar Ionkov error: 5256a3124a3SLatchesar Ionkov if (vfid) 5266a3124a3SLatchesar Ionkov v9fs_fid_destroy(vfid); 5276a3124a3SLatchesar Ionkov 5286a3124a3SLatchesar Ionkov if (inode) 5296a3124a3SLatchesar Ionkov iput(inode); 5306a3124a3SLatchesar Ionkov 5316a3124a3SLatchesar Ionkov return err; 5322bad8471SEric Van Hensbergen } 5332bad8471SEric Van Hensbergen 5342bad8471SEric Van Hensbergen /** 5352bad8471SEric Van Hensbergen * v9fs_vfs_mkdir - VFS mkdir hook to create a directory 53673c592b9SEric Van Hensbergen * @inode: inode that is being unlinked 5372bad8471SEric Van Hensbergen * @dentry: dentry that is being unlinked 5382bad8471SEric Van Hensbergen * @mode: mode for new directory 5392bad8471SEric Van Hensbergen * 5402bad8471SEric Van Hensbergen */ 5412bad8471SEric Van Hensbergen 5426a3124a3SLatchesar Ionkov static int v9fs_vfs_mkdir(struct inode *dir, struct dentry *dentry, int mode) 5432bad8471SEric Van Hensbergen { 5446a3124a3SLatchesar Ionkov int err; 5456a3124a3SLatchesar Ionkov u32 fid, perm; 5466a3124a3SLatchesar Ionkov struct v9fs_session_info *v9ses; 5476a3124a3SLatchesar Ionkov struct v9fs_fid *dfid, *vfid; 5486a3124a3SLatchesar Ionkov struct inode *inode; 5496a3124a3SLatchesar Ionkov 5506a3124a3SLatchesar Ionkov inode = NULL; 5516a3124a3SLatchesar Ionkov vfid = NULL; 5526a3124a3SLatchesar Ionkov v9ses = v9fs_inode2v9ses(dir); 5536a3124a3SLatchesar Ionkov dfid = v9fs_fid_lookup(dentry->d_parent); 5546a3124a3SLatchesar Ionkov perm = unixmode2p9mode(v9ses, mode | S_IFDIR); 5556a3124a3SLatchesar Ionkov 5566a3124a3SLatchesar Ionkov err = v9fs_create(v9ses, dfid->fid, (char *) dentry->d_name.name, 55716cce6d2SLatchesar Ionkov perm, V9FS_OREAD, NULL, &fid, NULL, NULL); 5586a3124a3SLatchesar Ionkov 5596a3124a3SLatchesar Ionkov if (err) { 5606a3124a3SLatchesar Ionkov dprintk(DEBUG_ERROR, "create error %d\n", err); 5616a3124a3SLatchesar Ionkov goto error; 5626a3124a3SLatchesar Ionkov } 5636a3124a3SLatchesar Ionkov 5646a3124a3SLatchesar Ionkov err = v9fs_t_clunk(v9ses, fid); 5656a3124a3SLatchesar Ionkov if (err) { 5666a3124a3SLatchesar Ionkov dprintk(DEBUG_ERROR, "clunk error %d\n", err); 5676a3124a3SLatchesar Ionkov goto error; 5686a3124a3SLatchesar Ionkov } 5696a3124a3SLatchesar Ionkov 5706a3124a3SLatchesar Ionkov vfid = v9fs_clone_walk(v9ses, dfid->fid, dentry); 5716a3124a3SLatchesar Ionkov if (IS_ERR(vfid)) { 5726a3124a3SLatchesar Ionkov err = PTR_ERR(vfid); 5736a3124a3SLatchesar Ionkov vfid = NULL; 5746a3124a3SLatchesar Ionkov goto error; 5756a3124a3SLatchesar Ionkov } 5766a3124a3SLatchesar Ionkov 5776a3124a3SLatchesar Ionkov inode = v9fs_inode_from_fid(v9ses, vfid->fid, dir->i_sb); 5786a3124a3SLatchesar Ionkov if (IS_ERR(inode)) { 5796a3124a3SLatchesar Ionkov err = PTR_ERR(inode); 5806a3124a3SLatchesar Ionkov inode = NULL; 5816a3124a3SLatchesar Ionkov goto error; 5826a3124a3SLatchesar Ionkov } 5836a3124a3SLatchesar Ionkov 5846a3124a3SLatchesar Ionkov dentry->d_op = &v9fs_dentry_operations; 5856a3124a3SLatchesar Ionkov d_instantiate(dentry, inode); 5866a3124a3SLatchesar Ionkov return 0; 5876a3124a3SLatchesar Ionkov 5886a3124a3SLatchesar Ionkov error: 5896a3124a3SLatchesar Ionkov if (vfid) 5906a3124a3SLatchesar Ionkov v9fs_fid_destroy(vfid); 5916a3124a3SLatchesar Ionkov 5926a3124a3SLatchesar Ionkov return err; 5932bad8471SEric Van Hensbergen } 5942bad8471SEric Van Hensbergen 5952bad8471SEric Van Hensbergen /** 5962bad8471SEric Van Hensbergen * v9fs_vfs_lookup - VFS lookup hook to "walk" to a new inode 5972bad8471SEric Van Hensbergen * @dir: inode that is being walked from 5982bad8471SEric Van Hensbergen * @dentry: dentry that is being walked to? 5992bad8471SEric Van Hensbergen * @nameidata: path data 6002bad8471SEric Van Hensbergen * 6012bad8471SEric Van Hensbergen */ 6022bad8471SEric Van Hensbergen 6032bad8471SEric Van Hensbergen static struct dentry *v9fs_vfs_lookup(struct inode *dir, struct dentry *dentry, 6042bad8471SEric Van Hensbergen struct nameidata *nameidata) 6052bad8471SEric Van Hensbergen { 6062bad8471SEric Van Hensbergen struct super_block *sb; 6072bad8471SEric Van Hensbergen struct v9fs_session_info *v9ses; 6082bad8471SEric Van Hensbergen struct v9fs_fid *dirfid; 6092bad8471SEric Van Hensbergen struct v9fs_fid *fid; 6102bad8471SEric Van Hensbergen struct inode *inode; 6112bad8471SEric Van Hensbergen struct v9fs_fcall *fcall = NULL; 6122bad8471SEric Van Hensbergen int dirfidnum = -1; 6132bad8471SEric Van Hensbergen int newfid = -1; 6142bad8471SEric Van Hensbergen int result = 0; 6152bad8471SEric Van Hensbergen 6162bad8471SEric Van Hensbergen dprintk(DEBUG_VFS, "dir: %p dentry: (%s) %p nameidata: %p\n", 617731805b4SLatchesar Ionkov dir, dentry->d_name.name, dentry, nameidata); 6182bad8471SEric Van Hensbergen 6192bad8471SEric Van Hensbergen sb = dir->i_sb; 6202bad8471SEric Van Hensbergen v9ses = v9fs_inode2v9ses(dir); 6215e7a99acSLatchesar Ionkov dentry->d_op = &v9fs_dentry_operations; 6220b8dd177SLatchesar Ionkov dirfid = v9fs_fid_lookup(dentry->d_parent); 6232bad8471SEric Van Hensbergen 6242bad8471SEric Van Hensbergen if (!dirfid) { 6252bad8471SEric Van Hensbergen dprintk(DEBUG_ERROR, "no dirfid\n"); 6262bad8471SEric Van Hensbergen return ERR_PTR(-EINVAL); 6272bad8471SEric Van Hensbergen } 6282bad8471SEric Van Hensbergen 6292bad8471SEric Van Hensbergen dirfidnum = dirfid->fid; 6302bad8471SEric Van Hensbergen 6312bad8471SEric Van Hensbergen if (dirfidnum < 0) { 6322bad8471SEric Van Hensbergen dprintk(DEBUG_ERROR, "no dirfid for inode %p, #%lu\n", 6332bad8471SEric Van Hensbergen dir, dir->i_ino); 6342bad8471SEric Van Hensbergen return ERR_PTR(-EBADF); 6352bad8471SEric Van Hensbergen } 6362bad8471SEric Van Hensbergen 6372bad8471SEric Van Hensbergen newfid = v9fs_get_idpool(&v9ses->fidpool); 6382bad8471SEric Van Hensbergen if (newfid < 0) { 6392bad8471SEric Van Hensbergen eprintk(KERN_WARNING, "newfid fails!\n"); 6402bad8471SEric Van Hensbergen return ERR_PTR(-ENOSPC); 6412bad8471SEric Van Hensbergen } 6422bad8471SEric Van Hensbergen 6436a3124a3SLatchesar Ionkov result = v9fs_t_walk(v9ses, dirfidnum, newfid, 6446a3124a3SLatchesar Ionkov (char *)dentry->d_name.name, NULL); 6452bad8471SEric Van Hensbergen if (result < 0) { 6462bad8471SEric Van Hensbergen v9fs_put_idpool(newfid, &v9ses->fidpool); 6472bad8471SEric Van Hensbergen if (result == -ENOENT) { 6482bad8471SEric Van Hensbergen d_add(dentry, NULL); 6490b8dd177SLatchesar Ionkov dprintk(DEBUG_VFS, 6502bad8471SEric Van Hensbergen "Return negative dentry %p count %d\n", 6512bad8471SEric Van Hensbergen dentry, atomic_read(&dentry->d_count)); 6522bad8471SEric Van Hensbergen return NULL; 6532bad8471SEric Van Hensbergen } 6542bad8471SEric Van Hensbergen dprintk(DEBUG_ERROR, "walk error:%d\n", result); 6552bad8471SEric Van Hensbergen goto FreeFcall; 6562bad8471SEric Van Hensbergen } 6572bad8471SEric Van Hensbergen 6582bad8471SEric Van Hensbergen result = v9fs_t_stat(v9ses, newfid, &fcall); 6592bad8471SEric Van Hensbergen if (result < 0) { 6602bad8471SEric Van Hensbergen dprintk(DEBUG_ERROR, "stat error\n"); 6612bad8471SEric Van Hensbergen goto FreeFcall; 6622bad8471SEric Van Hensbergen } 6632bad8471SEric Van Hensbergen 664531b1094SLatchesar Ionkov inode = v9fs_get_inode(sb, p9mode2unixmode(v9ses, 665531b1094SLatchesar Ionkov fcall->params.rstat.stat.mode)); 6662bad8471SEric Van Hensbergen 6672bad8471SEric Van Hensbergen if (IS_ERR(inode) && (PTR_ERR(inode) == -ENOSPC)) { 6682bad8471SEric Van Hensbergen eprintk(KERN_WARNING, "inode alloc failes, returns %ld\n", 6692bad8471SEric Van Hensbergen PTR_ERR(inode)); 6702bad8471SEric Van Hensbergen 6712bad8471SEric Van Hensbergen result = -ENOSPC; 6722bad8471SEric Van Hensbergen goto FreeFcall; 6732bad8471SEric Van Hensbergen } 6742bad8471SEric Van Hensbergen 675531b1094SLatchesar Ionkov inode->i_ino = v9fs_qid2ino(&fcall->params.rstat.stat.qid); 6762bad8471SEric Van Hensbergen 6776a3124a3SLatchesar Ionkov fid = v9fs_fid_create(v9ses, newfid); 6782bad8471SEric Van Hensbergen if (fid == NULL) { 6792bad8471SEric Van Hensbergen dprintk(DEBUG_ERROR, "couldn't insert\n"); 6802bad8471SEric Van Hensbergen result = -ENOMEM; 6812bad8471SEric Van Hensbergen goto FreeFcall; 6822bad8471SEric Van Hensbergen } 6832bad8471SEric Van Hensbergen 6846a3124a3SLatchesar Ionkov result = v9fs_fid_insert(fid, dentry); 6856a3124a3SLatchesar Ionkov if (result < 0) 6866a3124a3SLatchesar Ionkov goto FreeFcall; 6876a3124a3SLatchesar Ionkov 688531b1094SLatchesar Ionkov fid->qid = fcall->params.rstat.stat.qid; 689531b1094SLatchesar Ionkov v9fs_stat2inode(&fcall->params.rstat.stat, inode, inode->i_sb); 6902bad8471SEric Van Hensbergen 6912bad8471SEric Van Hensbergen d_add(dentry, inode); 6922bad8471SEric Van Hensbergen kfree(fcall); 6932bad8471SEric Van Hensbergen 6942bad8471SEric Van Hensbergen return NULL; 6952bad8471SEric Van Hensbergen 6962bad8471SEric Van Hensbergen FreeFcall: 6972bad8471SEric Van Hensbergen kfree(fcall); 6982bad8471SEric Van Hensbergen return ERR_PTR(result); 6992bad8471SEric Van Hensbergen } 7002bad8471SEric Van Hensbergen 7012bad8471SEric Van Hensbergen /** 7022bad8471SEric Van Hensbergen * v9fs_vfs_unlink - VFS unlink hook to delete an inode 7032bad8471SEric Van Hensbergen * @i: inode that is being unlinked 70473c592b9SEric Van Hensbergen * @d: dentry that is being unlinked 7052bad8471SEric Van Hensbergen * 7062bad8471SEric Van Hensbergen */ 7072bad8471SEric Van Hensbergen 7082bad8471SEric Van Hensbergen static int v9fs_vfs_unlink(struct inode *i, struct dentry *d) 7092bad8471SEric Van Hensbergen { 7102bad8471SEric Van Hensbergen return v9fs_remove(i, d, 0); 7112bad8471SEric Van Hensbergen } 7122bad8471SEric Van Hensbergen 7132bad8471SEric Van Hensbergen /** 7142bad8471SEric Van Hensbergen * v9fs_vfs_rmdir - VFS unlink hook to delete a directory 7152bad8471SEric Van Hensbergen * @i: inode that is being unlinked 71673c592b9SEric Van Hensbergen * @d: dentry that is being unlinked 7172bad8471SEric Van Hensbergen * 7182bad8471SEric Van Hensbergen */ 7192bad8471SEric Van Hensbergen 7202bad8471SEric Van Hensbergen static int v9fs_vfs_rmdir(struct inode *i, struct dentry *d) 7212bad8471SEric Van Hensbergen { 7222bad8471SEric Van Hensbergen return v9fs_remove(i, d, 1); 7232bad8471SEric Van Hensbergen } 7242bad8471SEric Van Hensbergen 7252bad8471SEric Van Hensbergen /** 7262bad8471SEric Van Hensbergen * v9fs_vfs_rename - VFS hook to rename an inode 7272bad8471SEric Van Hensbergen * @old_dir: old dir inode 7282bad8471SEric Van Hensbergen * @old_dentry: old dentry 7292bad8471SEric Van Hensbergen * @new_dir: new dir inode 7302bad8471SEric Van Hensbergen * @new_dentry: new dentry 7312bad8471SEric Van Hensbergen * 7322bad8471SEric Van Hensbergen */ 7332bad8471SEric Van Hensbergen 7342bad8471SEric Van Hensbergen static int 7352bad8471SEric Van Hensbergen v9fs_vfs_rename(struct inode *old_dir, struct dentry *old_dentry, 7362bad8471SEric Van Hensbergen struct inode *new_dir, struct dentry *new_dentry) 7372bad8471SEric Van Hensbergen { 7382bad8471SEric Van Hensbergen struct inode *old_inode = old_dentry->d_inode; 7392bad8471SEric Van Hensbergen struct v9fs_session_info *v9ses = v9fs_inode2v9ses(old_inode); 7400b8dd177SLatchesar Ionkov struct v9fs_fid *oldfid = v9fs_fid_lookup(old_dentry); 7412bad8471SEric Van Hensbergen struct v9fs_fid *olddirfid = 7420b8dd177SLatchesar Ionkov v9fs_fid_lookup(old_dentry->d_parent); 7432bad8471SEric Van Hensbergen struct v9fs_fid *newdirfid = 7440b8dd177SLatchesar Ionkov v9fs_fid_lookup(new_dentry->d_parent); 745531b1094SLatchesar Ionkov struct v9fs_wstat wstat; 7462bad8471SEric Van Hensbergen struct v9fs_fcall *fcall = NULL; 7472bad8471SEric Van Hensbergen int fid = -1; 7482bad8471SEric Van Hensbergen int olddirfidnum = -1; 7492bad8471SEric Van Hensbergen int newdirfidnum = -1; 7502bad8471SEric Van Hensbergen int retval = 0; 7512bad8471SEric Van Hensbergen 7522bad8471SEric Van Hensbergen dprintk(DEBUG_VFS, "\n"); 7532bad8471SEric Van Hensbergen 7542bad8471SEric Van Hensbergen if ((!oldfid) || (!olddirfid) || (!newdirfid)) { 7552bad8471SEric Van Hensbergen dprintk(DEBUG_ERROR, "problem with arguments\n"); 7562bad8471SEric Van Hensbergen return -EBADF; 7572bad8471SEric Van Hensbergen } 7582bad8471SEric Van Hensbergen 7592bad8471SEric Van Hensbergen /* 9P can only handle file rename in the same directory */ 7602bad8471SEric Van Hensbergen if (memcmp(&olddirfid->qid, &newdirfid->qid, sizeof(newdirfid->qid))) { 7612bad8471SEric Van Hensbergen dprintk(DEBUG_ERROR, "old dir and new dir are different\n"); 7622bad8471SEric Van Hensbergen retval = -EPERM; 7632bad8471SEric Van Hensbergen goto FreeFcallnBail; 7642bad8471SEric Van Hensbergen } 7652bad8471SEric Van Hensbergen 7662bad8471SEric Van Hensbergen fid = oldfid->fid; 7672bad8471SEric Van Hensbergen olddirfidnum = olddirfid->fid; 7682bad8471SEric Van Hensbergen newdirfidnum = newdirfid->fid; 7692bad8471SEric Van Hensbergen 7702bad8471SEric Van Hensbergen if (fid < 0) { 7712bad8471SEric Van Hensbergen dprintk(DEBUG_ERROR, "no fid for old file #%lu\n", 7722bad8471SEric Van Hensbergen old_inode->i_ino); 7732bad8471SEric Van Hensbergen retval = -EBADF; 7742bad8471SEric Van Hensbergen goto FreeFcallnBail; 7752bad8471SEric Van Hensbergen } 7762bad8471SEric Van Hensbergen 777531b1094SLatchesar Ionkov v9fs_blank_wstat(&wstat); 778531b1094SLatchesar Ionkov wstat.muid = v9ses->name; 779531b1094SLatchesar Ionkov wstat.name = (char *) new_dentry->d_name.name; 7802bad8471SEric Van Hensbergen 781531b1094SLatchesar Ionkov retval = v9fs_t_wstat(v9ses, fid, &wstat, &fcall); 7822bad8471SEric Van Hensbergen 7832bad8471SEric Van Hensbergen FreeFcallnBail: 7842bad8471SEric Van Hensbergen if (retval < 0) 785531b1094SLatchesar Ionkov PRINT_FCALL_ERROR("wstat error", fcall); 7862bad8471SEric Van Hensbergen 7872bad8471SEric Van Hensbergen kfree(fcall); 7882bad8471SEric Van Hensbergen return retval; 7892bad8471SEric Van Hensbergen } 7902bad8471SEric Van Hensbergen 7912bad8471SEric Van Hensbergen /** 792943ffb58SAdrian Bunk * v9fs_vfs_getattr - retrieve file metadata 7932bad8471SEric Van Hensbergen * @mnt - mount information 7942bad8471SEric Van Hensbergen * @dentry - file to get attributes on 7952bad8471SEric Van Hensbergen * @stat - metadata structure to populate 7962bad8471SEric Van Hensbergen * 7972bad8471SEric Van Hensbergen */ 7982bad8471SEric Van Hensbergen 7992bad8471SEric Van Hensbergen static int 8002bad8471SEric Van Hensbergen v9fs_vfs_getattr(struct vfsmount *mnt, struct dentry *dentry, 8012bad8471SEric Van Hensbergen struct kstat *stat) 8022bad8471SEric Van Hensbergen { 8032bad8471SEric Van Hensbergen struct v9fs_fcall *fcall = NULL; 8042bad8471SEric Van Hensbergen struct v9fs_session_info *v9ses = v9fs_inode2v9ses(dentry->d_inode); 8050b8dd177SLatchesar Ionkov struct v9fs_fid *fid = v9fs_fid_lookup(dentry); 8062bad8471SEric Van Hensbergen int err = -EPERM; 8072bad8471SEric Van Hensbergen 8082bad8471SEric Van Hensbergen dprintk(DEBUG_VFS, "dentry: %p\n", dentry); 8092bad8471SEric Van Hensbergen if (!fid) { 8102bad8471SEric Van Hensbergen dprintk(DEBUG_ERROR, 8112bad8471SEric Van Hensbergen "couldn't find fid associated with dentry\n"); 8122bad8471SEric Van Hensbergen return -EBADF; 8132bad8471SEric Van Hensbergen } 8142bad8471SEric Van Hensbergen 8152bad8471SEric Van Hensbergen err = v9fs_t_stat(v9ses, fid->fid, &fcall); 8162bad8471SEric Van Hensbergen 8172bad8471SEric Van Hensbergen if (err < 0) 8182bad8471SEric Van Hensbergen dprintk(DEBUG_ERROR, "stat error\n"); 8192bad8471SEric Van Hensbergen else { 820531b1094SLatchesar Ionkov v9fs_stat2inode(&fcall->params.rstat.stat, dentry->d_inode, 8212bad8471SEric Van Hensbergen dentry->d_inode->i_sb); 8222bad8471SEric Van Hensbergen generic_fillattr(dentry->d_inode, stat); 8232bad8471SEric Van Hensbergen } 8242bad8471SEric Van Hensbergen 8252bad8471SEric Van Hensbergen kfree(fcall); 8262bad8471SEric Van Hensbergen return err; 8272bad8471SEric Van Hensbergen } 8282bad8471SEric Van Hensbergen 8292bad8471SEric Van Hensbergen /** 8302bad8471SEric Van Hensbergen * v9fs_vfs_setattr - set file metadata 8312bad8471SEric Van Hensbergen * @dentry: file whose metadata to set 8322bad8471SEric Van Hensbergen * @iattr: metadata assignment structure 8332bad8471SEric Van Hensbergen * 8342bad8471SEric Van Hensbergen */ 8352bad8471SEric Van Hensbergen 8362bad8471SEric Van Hensbergen static int v9fs_vfs_setattr(struct dentry *dentry, struct iattr *iattr) 8372bad8471SEric Van Hensbergen { 8382bad8471SEric Van Hensbergen struct v9fs_session_info *v9ses = v9fs_inode2v9ses(dentry->d_inode); 8390b8dd177SLatchesar Ionkov struct v9fs_fid *fid = v9fs_fid_lookup(dentry); 8402bad8471SEric Van Hensbergen struct v9fs_fcall *fcall = NULL; 841531b1094SLatchesar Ionkov struct v9fs_wstat wstat; 8422bad8471SEric Van Hensbergen int res = -EPERM; 8432bad8471SEric Van Hensbergen 8442bad8471SEric Van Hensbergen dprintk(DEBUG_VFS, "\n"); 84573c592b9SEric Van Hensbergen 8462bad8471SEric Van Hensbergen if (!fid) { 8472bad8471SEric Van Hensbergen dprintk(DEBUG_ERROR, 8482bad8471SEric Van Hensbergen "Couldn't find fid associated with dentry\n"); 8492bad8471SEric Van Hensbergen return -EBADF; 8502bad8471SEric Van Hensbergen } 8512bad8471SEric Van Hensbergen 852531b1094SLatchesar Ionkov v9fs_blank_wstat(&wstat); 8532bad8471SEric Van Hensbergen if (iattr->ia_valid & ATTR_MODE) 854531b1094SLatchesar Ionkov wstat.mode = unixmode2p9mode(v9ses, iattr->ia_mode); 8552bad8471SEric Van Hensbergen 8562bad8471SEric Van Hensbergen if (iattr->ia_valid & ATTR_MTIME) 857531b1094SLatchesar Ionkov wstat.mtime = iattr->ia_mtime.tv_sec; 8582bad8471SEric Van Hensbergen 8592bad8471SEric Van Hensbergen if (iattr->ia_valid & ATTR_ATIME) 860531b1094SLatchesar Ionkov wstat.atime = iattr->ia_atime.tv_sec; 8612bad8471SEric Van Hensbergen 8622bad8471SEric Van Hensbergen if (iattr->ia_valid & ATTR_SIZE) 863531b1094SLatchesar Ionkov wstat.length = iattr->ia_size; 8642bad8471SEric Van Hensbergen 8652bad8471SEric Van Hensbergen if (v9ses->extended) { 866531b1094SLatchesar Ionkov if (iattr->ia_valid & ATTR_UID) 867531b1094SLatchesar Ionkov wstat.n_uid = iattr->ia_uid; 8682bad8471SEric Van Hensbergen 869531b1094SLatchesar Ionkov if (iattr->ia_valid & ATTR_GID) 870531b1094SLatchesar Ionkov wstat.n_gid = iattr->ia_gid; 8712bad8471SEric Van Hensbergen } 8722bad8471SEric Van Hensbergen 873531b1094SLatchesar Ionkov res = v9fs_t_wstat(v9ses, fid->fid, &wstat, &fcall); 8742bad8471SEric Van Hensbergen 8752bad8471SEric Van Hensbergen if (res < 0) 876531b1094SLatchesar Ionkov PRINT_FCALL_ERROR("wstat error", fcall); 8772bad8471SEric Van Hensbergen 8782bad8471SEric Van Hensbergen kfree(fcall); 8792bad8471SEric Van Hensbergen if (res >= 0) 8802bad8471SEric Van Hensbergen res = inode_setattr(dentry->d_inode, iattr); 8812bad8471SEric Van Hensbergen 8822bad8471SEric Van Hensbergen return res; 8832bad8471SEric Van Hensbergen } 8842bad8471SEric Van Hensbergen 8852bad8471SEric Van Hensbergen /** 886531b1094SLatchesar Ionkov * v9fs_stat2inode - populate an inode structure with mistat info 887531b1094SLatchesar Ionkov * @stat: Plan 9 metadata (mistat) structure 8882bad8471SEric Van Hensbergen * @inode: inode to populate 8892bad8471SEric Van Hensbergen * @sb: superblock of filesystem 8902bad8471SEric Van Hensbergen * 8912bad8471SEric Van Hensbergen */ 8922bad8471SEric Van Hensbergen 8932bad8471SEric Van Hensbergen void 894531b1094SLatchesar Ionkov v9fs_stat2inode(struct v9fs_stat *stat, struct inode *inode, 8952bad8471SEric Van Hensbergen struct super_block *sb) 8962bad8471SEric Van Hensbergen { 8971dac06b2SLatchesar Ionkov int n; 898531b1094SLatchesar Ionkov char ext[32]; 8992bad8471SEric Van Hensbergen struct v9fs_session_info *v9ses = sb->s_fs_info; 9002bad8471SEric Van Hensbergen 9012bad8471SEric Van Hensbergen inode->i_nlink = 1; 9022bad8471SEric Van Hensbergen 903531b1094SLatchesar Ionkov inode->i_atime.tv_sec = stat->atime; 904531b1094SLatchesar Ionkov inode->i_mtime.tv_sec = stat->mtime; 905531b1094SLatchesar Ionkov inode->i_ctime.tv_sec = stat->mtime; 9062bad8471SEric Van Hensbergen 9072bad8471SEric Van Hensbergen inode->i_uid = v9ses->uid; 9082bad8471SEric Van Hensbergen inode->i_gid = v9ses->gid; 9092bad8471SEric Van Hensbergen 910531b1094SLatchesar Ionkov if (v9ses->extended) { 911531b1094SLatchesar Ionkov inode->i_uid = stat->n_uid; 912531b1094SLatchesar Ionkov inode->i_gid = stat->n_gid; 913531b1094SLatchesar Ionkov } 914531b1094SLatchesar Ionkov 915531b1094SLatchesar Ionkov inode->i_mode = p9mode2unixmode(v9ses, stat->mode); 9162bad8471SEric Van Hensbergen if ((S_ISBLK(inode->i_mode)) || (S_ISCHR(inode->i_mode))) { 9172bad8471SEric Van Hensbergen char type = 0; 9182bad8471SEric Van Hensbergen int major = -1; 9192bad8471SEric Van Hensbergen int minor = -1; 920531b1094SLatchesar Ionkov 9211dac06b2SLatchesar Ionkov n = stat->extension.len; 9221dac06b2SLatchesar Ionkov if (n > sizeof(ext)-1) 9231dac06b2SLatchesar Ionkov n = sizeof(ext)-1; 9241dac06b2SLatchesar Ionkov memmove(ext, stat->extension.str, n); 9251dac06b2SLatchesar Ionkov ext[n] = 0; 926531b1094SLatchesar Ionkov sscanf(ext, "%c %u %u", &type, &major, &minor); 9272bad8471SEric Van Hensbergen switch (type) { 9282bad8471SEric Van Hensbergen case 'c': 9292bad8471SEric Van Hensbergen inode->i_mode &= ~S_IFBLK; 9302bad8471SEric Van Hensbergen inode->i_mode |= S_IFCHR; 9312bad8471SEric Van Hensbergen break; 9322bad8471SEric Van Hensbergen case 'b': 9332bad8471SEric Van Hensbergen break; 9342bad8471SEric Van Hensbergen default: 935531b1094SLatchesar Ionkov dprintk(DEBUG_ERROR, "Unknown special type %c (%.*s)\n", 936531b1094SLatchesar Ionkov type, stat->extension.len, stat->extension.str); 9372bad8471SEric Van Hensbergen }; 9382bad8471SEric Van Hensbergen inode->i_rdev = MKDEV(major, minor); 9392bad8471SEric Van Hensbergen } else 9402bad8471SEric Van Hensbergen inode->i_rdev = 0; 9412bad8471SEric Van Hensbergen 942531b1094SLatchesar Ionkov inode->i_size = stat->length; 9432bad8471SEric Van Hensbergen 9442bad8471SEric Van Hensbergen inode->i_blksize = sb->s_blocksize; 9452bad8471SEric Van Hensbergen inode->i_blocks = 9462bad8471SEric Van Hensbergen (inode->i_size + inode->i_blksize - 1) >> sb->s_blocksize_bits; 9472bad8471SEric Van Hensbergen } 9482bad8471SEric Van Hensbergen 9492bad8471SEric Van Hensbergen /** 9502bad8471SEric Van Hensbergen * v9fs_qid2ino - convert qid into inode number 9512bad8471SEric Van Hensbergen * @qid: qid to hash 9522bad8471SEric Van Hensbergen * 9532bad8471SEric Van Hensbergen * BUG: potential for inode number collisions? 9542bad8471SEric Van Hensbergen */ 9552bad8471SEric Van Hensbergen 9562bad8471SEric Van Hensbergen ino_t v9fs_qid2ino(struct v9fs_qid *qid) 9572bad8471SEric Van Hensbergen { 9582bad8471SEric Van Hensbergen u64 path = qid->path + 2; 9592bad8471SEric Van Hensbergen ino_t i = 0; 9602bad8471SEric Van Hensbergen 9612bad8471SEric Van Hensbergen if (sizeof(ino_t) == sizeof(path)) 9622bad8471SEric Van Hensbergen memcpy(&i, &path, sizeof(ino_t)); 9632bad8471SEric Van Hensbergen else 9642bad8471SEric Van Hensbergen i = (ino_t) (path ^ (path >> 32)); 9652bad8471SEric Van Hensbergen 9662bad8471SEric Van Hensbergen return i; 9672bad8471SEric Van Hensbergen } 9682bad8471SEric Van Hensbergen 9692bad8471SEric Van Hensbergen /** 9702bad8471SEric Van Hensbergen * v9fs_readlink - read a symlink's location (internal version) 9712bad8471SEric Van Hensbergen * @dentry: dentry for symlink 97273c592b9SEric Van Hensbergen * @buffer: buffer to load symlink location into 9732bad8471SEric Van Hensbergen * @buflen: length of buffer 9742bad8471SEric Van Hensbergen * 9752bad8471SEric Van Hensbergen */ 9762bad8471SEric Van Hensbergen 9772bad8471SEric Van Hensbergen static int v9fs_readlink(struct dentry *dentry, char *buffer, int buflen) 9782bad8471SEric Van Hensbergen { 9792bad8471SEric Van Hensbergen int retval = -EPERM; 9802bad8471SEric Van Hensbergen 9812bad8471SEric Van Hensbergen struct v9fs_fcall *fcall = NULL; 9822bad8471SEric Van Hensbergen struct v9fs_session_info *v9ses = v9fs_inode2v9ses(dentry->d_inode); 9830b8dd177SLatchesar Ionkov struct v9fs_fid *fid = v9fs_fid_lookup(dentry); 9842bad8471SEric Van Hensbergen 9852bad8471SEric Van Hensbergen if (!fid) { 9862bad8471SEric Van Hensbergen dprintk(DEBUG_ERROR, "could not resolve fid from dentry\n"); 9872bad8471SEric Van Hensbergen retval = -EBADF; 9882bad8471SEric Van Hensbergen goto FreeFcall; 9892bad8471SEric Van Hensbergen } 9902bad8471SEric Van Hensbergen 9912bad8471SEric Van Hensbergen if (!v9ses->extended) { 9922bad8471SEric Van Hensbergen retval = -EBADF; 9932bad8471SEric Van Hensbergen dprintk(DEBUG_ERROR, "not extended\n"); 9942bad8471SEric Van Hensbergen goto FreeFcall; 9952bad8471SEric Van Hensbergen } 9962bad8471SEric Van Hensbergen 9972bad8471SEric Van Hensbergen dprintk(DEBUG_VFS, " %s\n", dentry->d_name.name); 9982bad8471SEric Van Hensbergen retval = v9fs_t_stat(v9ses, fid->fid, &fcall); 9992bad8471SEric Van Hensbergen 10002bad8471SEric Van Hensbergen if (retval < 0) { 10012bad8471SEric Van Hensbergen dprintk(DEBUG_ERROR, "stat error\n"); 10022bad8471SEric Van Hensbergen goto FreeFcall; 10032bad8471SEric Van Hensbergen } 10042bad8471SEric Van Hensbergen 10052bad8471SEric Van Hensbergen if (!fcall) 10062bad8471SEric Van Hensbergen return -EIO; 10072bad8471SEric Van Hensbergen 1008531b1094SLatchesar Ionkov if (!(fcall->params.rstat.stat.mode & V9FS_DMSYMLINK)) { 10092bad8471SEric Van Hensbergen retval = -EINVAL; 10102bad8471SEric Van Hensbergen goto FreeFcall; 10112bad8471SEric Van Hensbergen } 10122bad8471SEric Van Hensbergen 10132bad8471SEric Van Hensbergen /* copy extension buffer into buffer */ 10146a3124a3SLatchesar Ionkov if (fcall->params.rstat.stat.extension.len < buflen) 101516cce6d2SLatchesar Ionkov buflen = fcall->params.rstat.stat.extension.len + 1; 10162bad8471SEric Van Hensbergen 101716cce6d2SLatchesar Ionkov memmove(buffer, fcall->params.rstat.stat.extension.str, buflen - 1); 1018531b1094SLatchesar Ionkov buffer[buflen-1] = 0; 10192bad8471SEric Van Hensbergen 102016cce6d2SLatchesar Ionkov dprintk(DEBUG_ERROR, "%s -> %.*s (%s)\n", dentry->d_name.name, fcall->params.rstat.stat.extension.len, 102116cce6d2SLatchesar Ionkov fcall->params.rstat.stat.extension.str, buffer); 10222bad8471SEric Van Hensbergen retval = buflen; 10232bad8471SEric Van Hensbergen 10242bad8471SEric Van Hensbergen FreeFcall: 10252bad8471SEric Van Hensbergen kfree(fcall); 10262bad8471SEric Van Hensbergen 10272bad8471SEric Van Hensbergen return retval; 10282bad8471SEric Van Hensbergen } 10292bad8471SEric Van Hensbergen 10302bad8471SEric Van Hensbergen /** 10312bad8471SEric Van Hensbergen * v9fs_vfs_readlink - read a symlink's location 10322bad8471SEric Van Hensbergen * @dentry: dentry for symlink 10332bad8471SEric Van Hensbergen * @buf: buffer to load symlink location into 10342bad8471SEric Van Hensbergen * @buflen: length of buffer 10352bad8471SEric Van Hensbergen * 10362bad8471SEric Van Hensbergen */ 10372bad8471SEric Van Hensbergen 10382bad8471SEric Van Hensbergen static int v9fs_vfs_readlink(struct dentry *dentry, char __user * buffer, 10392bad8471SEric Van Hensbergen int buflen) 10402bad8471SEric Van Hensbergen { 10412bad8471SEric Van Hensbergen int retval; 10422bad8471SEric Van Hensbergen int ret; 10432bad8471SEric Van Hensbergen char *link = __getname(); 10442bad8471SEric Van Hensbergen 1045a1f9d8d2SLatchesar Ionkov if (buflen > PATH_MAX) 1046a1f9d8d2SLatchesar Ionkov buflen = PATH_MAX; 10472bad8471SEric Van Hensbergen 10482bad8471SEric Van Hensbergen dprintk(DEBUG_VFS, " dentry: %s (%p)\n", dentry->d_iname, dentry); 10492bad8471SEric Van Hensbergen 10502bad8471SEric Van Hensbergen retval = v9fs_readlink(dentry, link, buflen); 10512bad8471SEric Van Hensbergen 10522bad8471SEric Van Hensbergen if (retval > 0) { 10532bad8471SEric Van Hensbergen if ((ret = copy_to_user(buffer, link, retval)) != 0) { 10542bad8471SEric Van Hensbergen dprintk(DEBUG_ERROR, "problem copying to user: %d\n", 10552bad8471SEric Van Hensbergen ret); 10562bad8471SEric Van Hensbergen retval = ret; 10572bad8471SEric Van Hensbergen } 10582bad8471SEric Van Hensbergen } 10592bad8471SEric Van Hensbergen 1060ce44eeb6SDavi Arnaut __putname(link); 10612bad8471SEric Van Hensbergen return retval; 10622bad8471SEric Van Hensbergen } 10632bad8471SEric Van Hensbergen 10642bad8471SEric Van Hensbergen /** 10652bad8471SEric Van Hensbergen * v9fs_vfs_follow_link - follow a symlink path 10662bad8471SEric Van Hensbergen * @dentry: dentry for symlink 10672bad8471SEric Van Hensbergen * @nd: nameidata 10682bad8471SEric Van Hensbergen * 10692bad8471SEric Van Hensbergen */ 10702bad8471SEric Van Hensbergen 10712bad8471SEric Van Hensbergen static void *v9fs_vfs_follow_link(struct dentry *dentry, struct nameidata *nd) 10722bad8471SEric Van Hensbergen { 10732bad8471SEric Van Hensbergen int len = 0; 10742bad8471SEric Van Hensbergen char *link = __getname(); 10752bad8471SEric Van Hensbergen 10762bad8471SEric Van Hensbergen dprintk(DEBUG_VFS, "%s n", dentry->d_name.name); 10772bad8471SEric Van Hensbergen 10782bad8471SEric Van Hensbergen if (!link) 10792bad8471SEric Van Hensbergen link = ERR_PTR(-ENOMEM); 10802bad8471SEric Van Hensbergen else { 108116cce6d2SLatchesar Ionkov len = v9fs_readlink(dentry, link, PATH_MAX); 10822bad8471SEric Van Hensbergen 10832bad8471SEric Van Hensbergen if (len < 0) { 1084ce44eeb6SDavi Arnaut __putname(link); 10852bad8471SEric Van Hensbergen link = ERR_PTR(len); 10862bad8471SEric Van Hensbergen } else 10872bad8471SEric Van Hensbergen link[len] = 0; 10882bad8471SEric Van Hensbergen } 10892bad8471SEric Van Hensbergen nd_set_link(nd, link); 10902bad8471SEric Van Hensbergen 10912bad8471SEric Van Hensbergen return NULL; 10922bad8471SEric Van Hensbergen } 10932bad8471SEric Van Hensbergen 10942bad8471SEric Van Hensbergen /** 10952bad8471SEric Van Hensbergen * v9fs_vfs_put_link - release a symlink path 10962bad8471SEric Van Hensbergen * @dentry: dentry for symlink 10972bad8471SEric Van Hensbergen * @nd: nameidata 10982bad8471SEric Van Hensbergen * 10992bad8471SEric Van Hensbergen */ 11002bad8471SEric Van Hensbergen 11012bad8471SEric Van Hensbergen static void v9fs_vfs_put_link(struct dentry *dentry, struct nameidata *nd, void *p) 11022bad8471SEric Van Hensbergen { 11032bad8471SEric Van Hensbergen char *s = nd_get_link(nd); 11042bad8471SEric Van Hensbergen 11052bad8471SEric Van Hensbergen dprintk(DEBUG_VFS, " %s %s\n", dentry->d_name.name, s); 11062bad8471SEric Van Hensbergen if (!IS_ERR(s)) 1107ce44eeb6SDavi Arnaut __putname(s); 11082bad8471SEric Van Hensbergen } 11092bad8471SEric Van Hensbergen 1110531b1094SLatchesar Ionkov static int v9fs_vfs_mkspecial(struct inode *dir, struct dentry *dentry, 1111531b1094SLatchesar Ionkov int mode, const char *extension) 1112531b1094SLatchesar Ionkov { 11136a3124a3SLatchesar Ionkov int err; 11146a3124a3SLatchesar Ionkov u32 fid, perm; 1115531b1094SLatchesar Ionkov struct v9fs_session_info *v9ses; 11166a3124a3SLatchesar Ionkov struct v9fs_fid *dfid, *vfid; 11176a3124a3SLatchesar Ionkov struct inode *inode; 1118531b1094SLatchesar Ionkov 11196a3124a3SLatchesar Ionkov inode = NULL; 11206a3124a3SLatchesar Ionkov vfid = NULL; 11216a3124a3SLatchesar Ionkov v9ses = v9fs_inode2v9ses(dir); 11226a3124a3SLatchesar Ionkov dfid = v9fs_fid_lookup(dentry->d_parent); 11236a3124a3SLatchesar Ionkov perm = unixmode2p9mode(v9ses, mode); 1124531b1094SLatchesar Ionkov 1125531b1094SLatchesar Ionkov if (!v9ses->extended) { 1126531b1094SLatchesar Ionkov dprintk(DEBUG_ERROR, "not extended\n"); 11276a3124a3SLatchesar Ionkov return -EPERM; 1128531b1094SLatchesar Ionkov } 1129531b1094SLatchesar Ionkov 11306a3124a3SLatchesar Ionkov err = v9fs_create(v9ses, dfid->fid, (char *) dentry->d_name.name, 113116cce6d2SLatchesar Ionkov perm, V9FS_OREAD, (char *) extension, &fid, NULL, NULL); 1132531b1094SLatchesar Ionkov 11336a3124a3SLatchesar Ionkov if (err) 11346a3124a3SLatchesar Ionkov goto error; 11356a3124a3SLatchesar Ionkov 11366a3124a3SLatchesar Ionkov err = v9fs_t_clunk(v9ses, fid); 11376a3124a3SLatchesar Ionkov if (err) 11386a3124a3SLatchesar Ionkov goto error; 11396a3124a3SLatchesar Ionkov 11406a3124a3SLatchesar Ionkov vfid = v9fs_clone_walk(v9ses, dfid->fid, dentry); 11416a3124a3SLatchesar Ionkov if (IS_ERR(vfid)) { 11426a3124a3SLatchesar Ionkov err = PTR_ERR(vfid); 11436a3124a3SLatchesar Ionkov vfid = NULL; 11446a3124a3SLatchesar Ionkov goto error; 11456a3124a3SLatchesar Ionkov } 11466a3124a3SLatchesar Ionkov 11476a3124a3SLatchesar Ionkov inode = v9fs_inode_from_fid(v9ses, vfid->fid, dir->i_sb); 11486a3124a3SLatchesar Ionkov if (IS_ERR(inode)) { 11496a3124a3SLatchesar Ionkov err = PTR_ERR(inode); 11506a3124a3SLatchesar Ionkov inode = NULL; 11516a3124a3SLatchesar Ionkov goto error; 1152531b1094SLatchesar Ionkov } 1153531b1094SLatchesar Ionkov 11546a3124a3SLatchesar Ionkov dentry->d_op = &v9fs_dentry_operations; 11556a3124a3SLatchesar Ionkov d_instantiate(dentry, inode); 11566a3124a3SLatchesar Ionkov return 0; 11576a3124a3SLatchesar Ionkov 11586a3124a3SLatchesar Ionkov error: 11596a3124a3SLatchesar Ionkov if (vfid) 11606a3124a3SLatchesar Ionkov v9fs_fid_destroy(vfid); 11616a3124a3SLatchesar Ionkov 11626a3124a3SLatchesar Ionkov if (inode) 11636a3124a3SLatchesar Ionkov iput(inode); 11646a3124a3SLatchesar Ionkov 11656a3124a3SLatchesar Ionkov return err; 11666a3124a3SLatchesar Ionkov 1167531b1094SLatchesar Ionkov } 1168531b1094SLatchesar Ionkov 1169531b1094SLatchesar Ionkov /** 1170531b1094SLatchesar Ionkov * v9fs_vfs_symlink - helper function to create symlinks 1171531b1094SLatchesar Ionkov * @dir: directory inode containing symlink 1172531b1094SLatchesar Ionkov * @dentry: dentry for symlink 1173531b1094SLatchesar Ionkov * @symname: symlink data 1174531b1094SLatchesar Ionkov * 1175531b1094SLatchesar Ionkov * See 9P2000.u RFC for more information 1176531b1094SLatchesar Ionkov * 1177531b1094SLatchesar Ionkov */ 1178531b1094SLatchesar Ionkov 1179531b1094SLatchesar Ionkov static int 1180531b1094SLatchesar Ionkov v9fs_vfs_symlink(struct inode *dir, struct dentry *dentry, const char *symname) 1181531b1094SLatchesar Ionkov { 1182531b1094SLatchesar Ionkov dprintk(DEBUG_VFS, " %lu,%s,%s\n", dir->i_ino, dentry->d_name.name, 1183531b1094SLatchesar Ionkov symname); 1184531b1094SLatchesar Ionkov 1185531b1094SLatchesar Ionkov return v9fs_vfs_mkspecial(dir, dentry, S_IFLNK, symname); 1186531b1094SLatchesar Ionkov } 1187531b1094SLatchesar Ionkov 11882bad8471SEric Van Hensbergen /** 11892bad8471SEric Van Hensbergen * v9fs_vfs_link - create a hardlink 11902bad8471SEric Van Hensbergen * @old_dentry: dentry for file to link to 11912bad8471SEric Van Hensbergen * @dir: inode destination for new link 119273c592b9SEric Van Hensbergen * @dentry: dentry for link 11932bad8471SEric Van Hensbergen * 11942bad8471SEric Van Hensbergen */ 11952bad8471SEric Van Hensbergen 11962bad8471SEric Van Hensbergen /* XXX - lots of code dup'd from symlink and creates, 11972bad8471SEric Van Hensbergen * figure out a better reuse strategy 11982bad8471SEric Van Hensbergen */ 11992bad8471SEric Van Hensbergen 12002bad8471SEric Van Hensbergen static int 12012bad8471SEric Van Hensbergen v9fs_vfs_link(struct dentry *old_dentry, struct inode *dir, 12022bad8471SEric Van Hensbergen struct dentry *dentry) 12032bad8471SEric Van Hensbergen { 1204531b1094SLatchesar Ionkov int retval; 1205531b1094SLatchesar Ionkov struct v9fs_fid *oldfid; 1206531b1094SLatchesar Ionkov char *name; 12072bad8471SEric Van Hensbergen 12082bad8471SEric Van Hensbergen dprintk(DEBUG_VFS, " %lu,%s,%s\n", dir->i_ino, dentry->d_name.name, 12092bad8471SEric Van Hensbergen old_dentry->d_name.name); 12102bad8471SEric Van Hensbergen 1211531b1094SLatchesar Ionkov oldfid = v9fs_fid_lookup(old_dentry); 1212531b1094SLatchesar Ionkov if (!oldfid) { 1213531b1094SLatchesar Ionkov dprintk(DEBUG_ERROR, "can't find oldfid\n"); 1214531b1094SLatchesar Ionkov return -EPERM; 12152bad8471SEric Van Hensbergen } 12162bad8471SEric Van Hensbergen 1217531b1094SLatchesar Ionkov name = __getname(); 121816cce6d2SLatchesar Ionkov sprintf(name, "%d\n", oldfid->fid); 1219531b1094SLatchesar Ionkov retval = v9fs_vfs_mkspecial(dir, dentry, V9FS_DMLINK, name); 1220531b1094SLatchesar Ionkov __putname(name); 12212bad8471SEric Van Hensbergen 12222bad8471SEric Van Hensbergen return retval; 12232bad8471SEric Van Hensbergen } 12242bad8471SEric Van Hensbergen 12252bad8471SEric Van Hensbergen /** 12262bad8471SEric Van Hensbergen * v9fs_vfs_mknod - create a special file 12272bad8471SEric Van Hensbergen * @dir: inode destination for new link 12282bad8471SEric Van Hensbergen * @dentry: dentry for file 12292bad8471SEric Van Hensbergen * @mode: mode for creation 12302bad8471SEric Van Hensbergen * @dev_t: device associated with special file 12312bad8471SEric Van Hensbergen * 12322bad8471SEric Van Hensbergen */ 12332bad8471SEric Van Hensbergen 12342bad8471SEric Van Hensbergen static int 12352bad8471SEric Van Hensbergen v9fs_vfs_mknod(struct inode *dir, struct dentry *dentry, int mode, dev_t rdev) 12362bad8471SEric Van Hensbergen { 1237531b1094SLatchesar Ionkov int retval; 1238531b1094SLatchesar Ionkov char *name; 12392bad8471SEric Van Hensbergen 12402bad8471SEric Van Hensbergen dprintk(DEBUG_VFS, " %lu,%s mode: %x MAJOR: %u MINOR: %u\n", dir->i_ino, 12412bad8471SEric Van Hensbergen dentry->d_name.name, mode, MAJOR(rdev), MINOR(rdev)); 12422bad8471SEric Van Hensbergen 1243531b1094SLatchesar Ionkov if (!new_valid_dev(rdev)) 1244531b1094SLatchesar Ionkov return -EINVAL; 124573c592b9SEric Van Hensbergen 1246531b1094SLatchesar Ionkov name = __getname(); 12472bad8471SEric Van Hensbergen /* build extension */ 12482bad8471SEric Van Hensbergen if (S_ISBLK(mode)) 1249531b1094SLatchesar Ionkov sprintf(name, "b %u %u", MAJOR(rdev), MINOR(rdev)); 12502bad8471SEric Van Hensbergen else if (S_ISCHR(mode)) 1251531b1094SLatchesar Ionkov sprintf(name, "c %u %u", MAJOR(rdev), MINOR(rdev)); 125273c592b9SEric Van Hensbergen else if (S_ISFIFO(mode)) 1253531b1094SLatchesar Ionkov *name = 0; 12542bad8471SEric Van Hensbergen else { 1255531b1094SLatchesar Ionkov __putname(name); 1256531b1094SLatchesar Ionkov return -EINVAL; 12572bad8471SEric Van Hensbergen } 12582bad8471SEric Van Hensbergen 1259531b1094SLatchesar Ionkov retval = v9fs_vfs_mkspecial(dir, dentry, mode, name); 1260531b1094SLatchesar Ionkov __putname(name); 12612bad8471SEric Van Hensbergen 12622bad8471SEric Van Hensbergen return retval; 12632bad8471SEric Van Hensbergen } 12642bad8471SEric Van Hensbergen 1265b501611aSEric Van Hensbergen static struct inode_operations v9fs_dir_inode_operations_ext = { 12662bad8471SEric Van Hensbergen .create = v9fs_vfs_create, 12672bad8471SEric Van Hensbergen .lookup = v9fs_vfs_lookup, 12682bad8471SEric Van Hensbergen .symlink = v9fs_vfs_symlink, 12692bad8471SEric Van Hensbergen .link = v9fs_vfs_link, 12702bad8471SEric Van Hensbergen .unlink = v9fs_vfs_unlink, 12712bad8471SEric Van Hensbergen .mkdir = v9fs_vfs_mkdir, 12722bad8471SEric Van Hensbergen .rmdir = v9fs_vfs_rmdir, 12732bad8471SEric Van Hensbergen .mknod = v9fs_vfs_mknod, 12742bad8471SEric Van Hensbergen .rename = v9fs_vfs_rename, 12752bad8471SEric Van Hensbergen .readlink = v9fs_vfs_readlink, 12762bad8471SEric Van Hensbergen .getattr = v9fs_vfs_getattr, 12772bad8471SEric Van Hensbergen .setattr = v9fs_vfs_setattr, 12782bad8471SEric Van Hensbergen }; 12792bad8471SEric Van Hensbergen 1280b501611aSEric Van Hensbergen static struct inode_operations v9fs_dir_inode_operations = { 1281b501611aSEric Van Hensbergen .create = v9fs_vfs_create, 1282b501611aSEric Van Hensbergen .lookup = v9fs_vfs_lookup, 1283b501611aSEric Van Hensbergen .unlink = v9fs_vfs_unlink, 1284b501611aSEric Van Hensbergen .mkdir = v9fs_vfs_mkdir, 1285b501611aSEric Van Hensbergen .rmdir = v9fs_vfs_rmdir, 1286b501611aSEric Van Hensbergen .mknod = v9fs_vfs_mknod, 1287b501611aSEric Van Hensbergen .rename = v9fs_vfs_rename, 1288b501611aSEric Van Hensbergen .getattr = v9fs_vfs_getattr, 1289b501611aSEric Van Hensbergen .setattr = v9fs_vfs_setattr, 1290b501611aSEric Van Hensbergen }; 1291b501611aSEric Van Hensbergen 12922bad8471SEric Van Hensbergen static struct inode_operations v9fs_file_inode_operations = { 12932bad8471SEric Van Hensbergen .getattr = v9fs_vfs_getattr, 12942bad8471SEric Van Hensbergen .setattr = v9fs_vfs_setattr, 12952bad8471SEric Van Hensbergen }; 12962bad8471SEric Van Hensbergen 12972bad8471SEric Van Hensbergen static struct inode_operations v9fs_symlink_inode_operations = { 12982bad8471SEric Van Hensbergen .readlink = v9fs_vfs_readlink, 12992bad8471SEric Van Hensbergen .follow_link = v9fs_vfs_follow_link, 13002bad8471SEric Van Hensbergen .put_link = v9fs_vfs_put_link, 13012bad8471SEric Van Hensbergen .getattr = v9fs_vfs_getattr, 13022bad8471SEric Van Hensbergen .setattr = v9fs_vfs_setattr, 13032bad8471SEric Van Hensbergen }; 1304