12bad8471SEric Van Hensbergen /* 22bad8471SEric Van Hensbergen * linux/fs/9p/vfs_inode.c 32bad8471SEric Van Hensbergen * 42bad8471SEric Van Hensbergen * This file contians 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 "conv.h" 442bad8471SEric Van Hensbergen #include "fid.h" 452bad8471SEric Van Hensbergen 462bad8471SEric Van Hensbergen static struct inode_operations v9fs_dir_inode_operations; 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 572bad8471SEric Van Hensbergen static inline 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 952bad8471SEric Van Hensbergen static inline 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 1282bad8471SEric Van Hensbergen /** 1292bad8471SEric Van Hensbergen * v9fs_blank_mistat - helper function to setup a 9P stat structure 1302bad8471SEric Van Hensbergen * @v9ses: 9P session info (for determining extended mode) 1312bad8471SEric Van Hensbergen * @mistat: structure to initialize 1322bad8471SEric Van Hensbergen * 1332bad8471SEric Van Hensbergen */ 1342bad8471SEric Van Hensbergen 1352bad8471SEric Van Hensbergen static inline void 1362bad8471SEric Van Hensbergen v9fs_blank_mistat(struct v9fs_session_info *v9ses, struct v9fs_stat *mistat) 1372bad8471SEric Van Hensbergen { 1382bad8471SEric Van Hensbergen mistat->type = ~0; 1392bad8471SEric Van Hensbergen mistat->dev = ~0; 1402bad8471SEric Van Hensbergen mistat->qid.type = ~0; 1412bad8471SEric Van Hensbergen mistat->qid.version = ~0; 1422bad8471SEric Van Hensbergen *((long long *)&mistat->qid.path) = ~0; 1432bad8471SEric Van Hensbergen mistat->mode = ~0; 1442bad8471SEric Van Hensbergen mistat->atime = ~0; 1452bad8471SEric Van Hensbergen mistat->mtime = ~0; 1462bad8471SEric Van Hensbergen mistat->length = ~0; 1472bad8471SEric Van Hensbergen mistat->name = mistat->data; 1482bad8471SEric Van Hensbergen mistat->uid = mistat->data; 1492bad8471SEric Van Hensbergen mistat->gid = mistat->data; 1502bad8471SEric Van Hensbergen mistat->muid = mistat->data; 1512bad8471SEric Van Hensbergen if (v9ses->extended) { 1522bad8471SEric Van Hensbergen mistat->n_uid = ~0; 1532bad8471SEric Van Hensbergen mistat->n_gid = ~0; 1542bad8471SEric Van Hensbergen mistat->n_muid = ~0; 1552bad8471SEric Van Hensbergen mistat->extension = mistat->data; 1562bad8471SEric Van Hensbergen } 1572bad8471SEric Van Hensbergen *mistat->data = 0; 1582bad8471SEric Van Hensbergen } 1592bad8471SEric Van Hensbergen 1602bad8471SEric Van Hensbergen /** 1612bad8471SEric Van Hensbergen * v9fs_mistat2unix - convert mistat to unix stat 1622bad8471SEric Van Hensbergen * @mistat: Plan 9 metadata (mistat) structure 1632bad8471SEric Van Hensbergen * @stat: unix metadata (stat) structure to populate 1642bad8471SEric Van Hensbergen * @sb: superblock 1652bad8471SEric Van Hensbergen * 1662bad8471SEric Van Hensbergen */ 1672bad8471SEric Van Hensbergen 1682bad8471SEric Van Hensbergen static void 1692bad8471SEric Van Hensbergen v9fs_mistat2unix(struct v9fs_stat *mistat, struct stat *buf, 1702bad8471SEric Van Hensbergen struct super_block *sb) 1712bad8471SEric Van Hensbergen { 1722bad8471SEric Van Hensbergen struct v9fs_session_info *v9ses = sb ? sb->s_fs_info : NULL; 1732bad8471SEric Van Hensbergen 1742bad8471SEric Van Hensbergen buf->st_nlink = 1; 1752bad8471SEric Van Hensbergen 1762bad8471SEric Van Hensbergen buf->st_atime = mistat->atime; 1772bad8471SEric Van Hensbergen buf->st_mtime = mistat->mtime; 1782bad8471SEric Van Hensbergen buf->st_ctime = mistat->mtime; 1792bad8471SEric Van Hensbergen 1802bad8471SEric Van Hensbergen if (v9ses && v9ses->extended) { 1812bad8471SEric Van Hensbergen /* TODO: string to uid mapping via user-space daemon */ 1822bad8471SEric Van Hensbergen buf->st_uid = mistat->n_uid; 1832bad8471SEric Van Hensbergen buf->st_gid = mistat->n_gid; 1842bad8471SEric Van Hensbergen 1852bad8471SEric Van Hensbergen sscanf(mistat->uid, "%x", (unsigned int *)&buf->st_uid); 1862bad8471SEric Van Hensbergen sscanf(mistat->gid, "%x", (unsigned int *)&buf->st_gid); 1872bad8471SEric Van Hensbergen } else { 1882bad8471SEric Van Hensbergen buf->st_uid = v9ses->uid; 1892bad8471SEric Van Hensbergen buf->st_gid = v9ses->gid; 1902bad8471SEric Van Hensbergen } 1912bad8471SEric Van Hensbergen 1922bad8471SEric Van Hensbergen buf->st_uid = (unsigned short)-1; 1932bad8471SEric Van Hensbergen buf->st_gid = (unsigned short)-1; 1942bad8471SEric Van Hensbergen 1952bad8471SEric Van Hensbergen if (v9ses && v9ses->extended) { 1962bad8471SEric Van Hensbergen if (mistat->n_uid != -1) 1972bad8471SEric Van Hensbergen sscanf(mistat->uid, "%x", (unsigned int *)&buf->st_uid); 1982bad8471SEric Van Hensbergen 1992bad8471SEric Van Hensbergen if (mistat->n_gid != -1) 2002bad8471SEric Van Hensbergen sscanf(mistat->gid, "%x", (unsigned int *)&buf->st_gid); 2012bad8471SEric Van Hensbergen } 2022bad8471SEric Van Hensbergen 2032bad8471SEric Van Hensbergen if (buf->st_uid == (unsigned short)-1) 2042bad8471SEric Van Hensbergen buf->st_uid = v9ses->uid; 2052bad8471SEric Van Hensbergen if (buf->st_gid == (unsigned short)-1) 2062bad8471SEric Van Hensbergen buf->st_gid = v9ses->gid; 2072bad8471SEric Van Hensbergen 2082bad8471SEric Van Hensbergen buf->st_mode = p9mode2unixmode(v9ses, mistat->mode); 2092bad8471SEric Van Hensbergen if ((S_ISBLK(buf->st_mode)) || (S_ISCHR(buf->st_mode))) { 2102bad8471SEric Van Hensbergen char type = 0; 2112bad8471SEric Van Hensbergen int major = -1; 2122bad8471SEric Van Hensbergen int minor = -1; 2132bad8471SEric Van Hensbergen sscanf(mistat->extension, "%c %u %u", &type, &major, &minor); 2142bad8471SEric Van Hensbergen switch (type) { 2152bad8471SEric Van Hensbergen case 'c': 2162bad8471SEric Van Hensbergen buf->st_mode &= ~S_IFBLK; 2172bad8471SEric Van Hensbergen buf->st_mode |= S_IFCHR; 2182bad8471SEric Van Hensbergen break; 2192bad8471SEric Van Hensbergen case 'b': 2202bad8471SEric Van Hensbergen break; 2212bad8471SEric Van Hensbergen default: 2222bad8471SEric Van Hensbergen dprintk(DEBUG_ERROR, "Unknown special type %c (%s)\n", 2232bad8471SEric Van Hensbergen type, mistat->extension); 2242bad8471SEric Van Hensbergen }; 2252bad8471SEric Van Hensbergen buf->st_rdev = MKDEV(major, minor); 2262bad8471SEric Van Hensbergen } else 2272bad8471SEric Van Hensbergen buf->st_rdev = 0; 2282bad8471SEric Van Hensbergen 2292bad8471SEric Van Hensbergen buf->st_size = mistat->length; 2302bad8471SEric Van Hensbergen 2312bad8471SEric Van Hensbergen buf->st_blksize = sb->s_blocksize; 2322bad8471SEric Van Hensbergen buf->st_blocks = 2332bad8471SEric Van Hensbergen (buf->st_size + buf->st_blksize - 1) >> sb->s_blocksize_bits; 2342bad8471SEric Van Hensbergen } 2352bad8471SEric Van Hensbergen 2362bad8471SEric Van Hensbergen /** 2372bad8471SEric Van Hensbergen * v9fs_get_inode - helper function to setup an inode 2382bad8471SEric Van Hensbergen * @sb: superblock 2392bad8471SEric Van Hensbergen * @mode: mode to setup inode with 2402bad8471SEric Van Hensbergen * 2412bad8471SEric Van Hensbergen */ 2422bad8471SEric Van Hensbergen 2432bad8471SEric Van Hensbergen struct inode *v9fs_get_inode(struct super_block *sb, int mode) 2442bad8471SEric Van Hensbergen { 2452bad8471SEric Van Hensbergen struct inode *inode = NULL; 2462bad8471SEric Van Hensbergen 2472bad8471SEric Van Hensbergen dprintk(DEBUG_VFS, "super block: %p mode: %o\n", sb, mode); 2482bad8471SEric Van Hensbergen 2492bad8471SEric Van Hensbergen inode = new_inode(sb); 2502bad8471SEric Van Hensbergen if (inode) { 2512bad8471SEric Van Hensbergen inode->i_mode = mode; 2522bad8471SEric Van Hensbergen inode->i_uid = current->fsuid; 2532bad8471SEric Van Hensbergen inode->i_gid = current->fsgid; 2542bad8471SEric Van Hensbergen inode->i_blksize = sb->s_blocksize; 2552bad8471SEric Van Hensbergen inode->i_blocks = 0; 2562bad8471SEric Van Hensbergen inode->i_rdev = 0; 2572bad8471SEric Van Hensbergen inode->i_atime = inode->i_mtime = inode->i_ctime = CURRENT_TIME; 2582bad8471SEric Van Hensbergen 2592bad8471SEric Van Hensbergen switch (mode & S_IFMT) { 2602bad8471SEric Van Hensbergen case S_IFIFO: 2612bad8471SEric Van Hensbergen case S_IFBLK: 2622bad8471SEric Van Hensbergen case S_IFCHR: 2632bad8471SEric Van Hensbergen case S_IFSOCK: 2642bad8471SEric Van Hensbergen case S_IFREG: 2652bad8471SEric Van Hensbergen inode->i_op = &v9fs_file_inode_operations; 2662bad8471SEric Van Hensbergen inode->i_fop = &v9fs_file_operations; 2672bad8471SEric Van Hensbergen break; 2682bad8471SEric Van Hensbergen case S_IFDIR: 2692bad8471SEric Van Hensbergen inode->i_nlink++; 2702bad8471SEric Van Hensbergen inode->i_op = &v9fs_dir_inode_operations; 2712bad8471SEric Van Hensbergen inode->i_fop = &v9fs_dir_operations; 2722bad8471SEric Van Hensbergen break; 2732bad8471SEric Van Hensbergen case S_IFLNK: 2742bad8471SEric Van Hensbergen inode->i_op = &v9fs_symlink_inode_operations; 2752bad8471SEric Van Hensbergen break; 2762bad8471SEric Van Hensbergen default: 2772bad8471SEric Van Hensbergen dprintk(DEBUG_ERROR, "BAD mode 0x%x S_IFMT 0x%x\n", 2782bad8471SEric Van Hensbergen mode, mode & S_IFMT); 2792bad8471SEric Van Hensbergen return ERR_PTR(-EINVAL); 2802bad8471SEric Van Hensbergen } 2812bad8471SEric Van Hensbergen } else { 2822bad8471SEric Van Hensbergen eprintk(KERN_WARNING, "Problem allocating inode\n"); 2832bad8471SEric Van Hensbergen return ERR_PTR(-ENOMEM); 2842bad8471SEric Van Hensbergen } 2852bad8471SEric Van Hensbergen return inode; 2862bad8471SEric Van Hensbergen } 2872bad8471SEric Van Hensbergen 2882bad8471SEric Van Hensbergen /** 2892bad8471SEric Van Hensbergen * v9fs_create - helper function to create files and directories 2902bad8471SEric Van Hensbergen * @dir: directory inode file is being created in 2912bad8471SEric Van Hensbergen * @file_dentry: dentry file is being created in 2922bad8471SEric Van Hensbergen * @perm: permissions file is being created with 2932bad8471SEric Van Hensbergen * @open_mode: resulting open mode for file ??? 2942bad8471SEric Van Hensbergen * 2952bad8471SEric Van Hensbergen */ 2962bad8471SEric Van Hensbergen 2972bad8471SEric Van Hensbergen static int 2982bad8471SEric Van Hensbergen v9fs_create(struct inode *dir, 2992bad8471SEric Van Hensbergen struct dentry *file_dentry, 3002bad8471SEric Van Hensbergen unsigned int perm, unsigned int open_mode) 3012bad8471SEric Van Hensbergen { 3022bad8471SEric Van Hensbergen struct v9fs_session_info *v9ses = v9fs_inode2v9ses(dir); 3032bad8471SEric Van Hensbergen struct super_block *sb = dir->i_sb; 3042bad8471SEric Van Hensbergen struct v9fs_fid *dirfid = 3052bad8471SEric Van Hensbergen v9fs_fid_lookup(file_dentry->d_parent, FID_WALK); 3062bad8471SEric Van Hensbergen struct v9fs_fid *fid = NULL; 3072bad8471SEric Van Hensbergen struct inode *file_inode = NULL; 3082bad8471SEric Van Hensbergen struct v9fs_fcall *fcall = NULL; 3092bad8471SEric Van Hensbergen struct v9fs_qid qid; 3102bad8471SEric Van Hensbergen struct stat newstat; 3112bad8471SEric Van Hensbergen int dirfidnum = -1; 3122bad8471SEric Van Hensbergen long newfid = -1; 3132bad8471SEric Van Hensbergen int result = 0; 3142bad8471SEric Van Hensbergen unsigned int iounit = 0; 3152bad8471SEric Van Hensbergen 3162bad8471SEric Van Hensbergen perm = unixmode2p9mode(v9ses, perm); 3172bad8471SEric Van Hensbergen 3182bad8471SEric Van Hensbergen dprintk(DEBUG_VFS, "dir: %p dentry: %p perm: %o mode: %o\n", dir, 3192bad8471SEric Van Hensbergen file_dentry, perm, open_mode); 3202bad8471SEric Van Hensbergen 3212bad8471SEric Van Hensbergen if (!dirfid) 3222bad8471SEric Van Hensbergen return -EBADF; 3232bad8471SEric Van Hensbergen 3242bad8471SEric Van Hensbergen dirfidnum = dirfid->fid; 3252bad8471SEric Van Hensbergen if (dirfidnum < 0) { 3262bad8471SEric Van Hensbergen dprintk(DEBUG_ERROR, "No fid for the directory #%lu\n", 3272bad8471SEric Van Hensbergen dir->i_ino); 3282bad8471SEric Van Hensbergen return -EBADF; 3292bad8471SEric Van Hensbergen } 3302bad8471SEric Van Hensbergen 3312bad8471SEric Van Hensbergen if (file_dentry->d_inode) { 3322bad8471SEric Van Hensbergen dprintk(DEBUG_ERROR, 3332bad8471SEric Van Hensbergen "Odd. There is an inode for dir %lu, name :%s:\n", 3342bad8471SEric Van Hensbergen dir->i_ino, file_dentry->d_name.name); 3352bad8471SEric Van Hensbergen return -EEXIST; 3362bad8471SEric Van Hensbergen } 3372bad8471SEric Van Hensbergen 3382bad8471SEric Van Hensbergen newfid = v9fs_get_idpool(&v9ses->fidpool); 3392bad8471SEric Van Hensbergen if (newfid < 0) { 3402bad8471SEric Van Hensbergen eprintk(KERN_WARNING, "no free fids available\n"); 3412bad8471SEric Van Hensbergen return -ENOSPC; 3422bad8471SEric Van Hensbergen } 3432bad8471SEric Van Hensbergen 3442bad8471SEric Van Hensbergen result = v9fs_t_walk(v9ses, dirfidnum, newfid, NULL, &fcall); 3452bad8471SEric Van Hensbergen if (result < 0) { 3462bad8471SEric Van Hensbergen dprintk(DEBUG_ERROR, "clone error: %s\n", FCALL_ERROR(fcall)); 3472bad8471SEric Van Hensbergen v9fs_put_idpool(newfid, &v9ses->fidpool); 3482bad8471SEric Van Hensbergen newfid = 0; 3492bad8471SEric Van Hensbergen goto CleanUpFid; 3502bad8471SEric Van Hensbergen } 3512bad8471SEric Van Hensbergen 3522bad8471SEric Van Hensbergen kfree(fcall); 3532bad8471SEric Van Hensbergen 3542bad8471SEric Van Hensbergen result = v9fs_t_create(v9ses, newfid, (char *)file_dentry->d_name.name, 3552bad8471SEric Van Hensbergen perm, open_mode, &fcall); 3562bad8471SEric Van Hensbergen if (result < 0) { 3572bad8471SEric Van Hensbergen dprintk(DEBUG_ERROR, "create fails: %s(%d)\n", 3582bad8471SEric Van Hensbergen FCALL_ERROR(fcall), result); 3592bad8471SEric Van Hensbergen 3602bad8471SEric Van Hensbergen goto CleanUpFid; 3612bad8471SEric Van Hensbergen } 3622bad8471SEric Van Hensbergen 3632bad8471SEric Van Hensbergen iounit = fcall->params.rcreate.iounit; 3642bad8471SEric Van Hensbergen qid = fcall->params.rcreate.qid; 3652bad8471SEric Van Hensbergen kfree(fcall); 3662bad8471SEric Van Hensbergen 3672bad8471SEric Van Hensbergen fid = v9fs_fid_create(file_dentry); 3682bad8471SEric Van Hensbergen if (!fid) { 3692bad8471SEric Van Hensbergen result = -ENOMEM; 3702bad8471SEric Van Hensbergen goto CleanUpFid; 3712bad8471SEric Van Hensbergen } 3722bad8471SEric Van Hensbergen 3732bad8471SEric Van Hensbergen fid->fid = newfid; 3742bad8471SEric Van Hensbergen fid->fidopen = 0; 3752bad8471SEric Van Hensbergen fid->fidcreate = 1; 3762bad8471SEric Van Hensbergen fid->qid = qid; 3772bad8471SEric Van Hensbergen fid->iounit = iounit; 3782bad8471SEric Van Hensbergen fid->rdir_pos = 0; 3792bad8471SEric Van Hensbergen fid->rdir_fcall = NULL; 3802bad8471SEric Van Hensbergen fid->v9ses = v9ses; 3812bad8471SEric Van Hensbergen 3822bad8471SEric Van Hensbergen if ((perm & V9FS_DMSYMLINK) || (perm & V9FS_DMLINK) || 3832bad8471SEric Van Hensbergen (perm & V9FS_DMNAMEDPIPE) || (perm & V9FS_DMSOCKET) || 3842bad8471SEric Van Hensbergen (perm & V9FS_DMDEVICE)) 3852bad8471SEric Van Hensbergen return 0; 3862bad8471SEric Van Hensbergen 3872bad8471SEric Van Hensbergen result = v9fs_t_stat(v9ses, newfid, &fcall); 3882bad8471SEric Van Hensbergen if (result < 0) { 3892bad8471SEric Van Hensbergen dprintk(DEBUG_ERROR, "stat error: %s(%d)\n", FCALL_ERROR(fcall), 3902bad8471SEric Van Hensbergen result); 3912bad8471SEric Van Hensbergen goto CleanUpFid; 3922bad8471SEric Van Hensbergen } 3932bad8471SEric Van Hensbergen 3942bad8471SEric Van Hensbergen v9fs_mistat2unix(fcall->params.rstat.stat, &newstat, sb); 3952bad8471SEric Van Hensbergen 3962bad8471SEric Van Hensbergen file_inode = v9fs_get_inode(sb, newstat.st_mode); 3972bad8471SEric Van Hensbergen if ((!file_inode) || IS_ERR(file_inode)) { 3982bad8471SEric Van Hensbergen dprintk(DEBUG_ERROR, "create inode failed\n"); 3992bad8471SEric Van Hensbergen result = -EBADF; 4002bad8471SEric Van Hensbergen goto CleanUpFid; 4012bad8471SEric Van Hensbergen } 4022bad8471SEric Van Hensbergen 4032bad8471SEric Van Hensbergen v9fs_mistat2inode(fcall->params.rstat.stat, file_inode, sb); 4042bad8471SEric Van Hensbergen kfree(fcall); 4052bad8471SEric Van Hensbergen d_instantiate(file_dentry, file_inode); 4062bad8471SEric Van Hensbergen 4072bad8471SEric Van Hensbergen if (perm & V9FS_DMDIR) { 4082bad8471SEric Van Hensbergen if (v9fs_t_clunk(v9ses, newfid, &fcall)) 4092bad8471SEric Van Hensbergen dprintk(DEBUG_ERROR, "clunk for mkdir failed: %s\n", 4102bad8471SEric Van Hensbergen FCALL_ERROR(fcall)); 4112bad8471SEric Van Hensbergen 4122bad8471SEric Van Hensbergen v9fs_put_idpool(newfid, &v9ses->fidpool); 4132bad8471SEric Van Hensbergen kfree(fcall); 4142bad8471SEric Van Hensbergen fid->fidopen = 0; 4152bad8471SEric Van Hensbergen fid->fidcreate = 0; 4162bad8471SEric Van Hensbergen d_drop(file_dentry); 4172bad8471SEric Van Hensbergen } 4182bad8471SEric Van Hensbergen 4192bad8471SEric Van Hensbergen return 0; 4202bad8471SEric Van Hensbergen 4212bad8471SEric Van Hensbergen CleanUpFid: 4222bad8471SEric Van Hensbergen kfree(fcall); 4232bad8471SEric Van Hensbergen 4242bad8471SEric Van Hensbergen if (newfid) { 4252bad8471SEric Van Hensbergen if (v9fs_t_clunk(v9ses, newfid, &fcall)) 4262bad8471SEric Van Hensbergen dprintk(DEBUG_ERROR, "clunk failed: %s\n", 4272bad8471SEric Van Hensbergen FCALL_ERROR(fcall)); 4282bad8471SEric Van Hensbergen 4292bad8471SEric Van Hensbergen v9fs_put_idpool(newfid, &v9ses->fidpool); 4302bad8471SEric Van Hensbergen kfree(fcall); 4312bad8471SEric Van Hensbergen } 4322bad8471SEric Van Hensbergen return result; 4332bad8471SEric Van Hensbergen } 4342bad8471SEric Van Hensbergen 4352bad8471SEric Van Hensbergen /** 4362bad8471SEric Van Hensbergen * v9fs_remove - helper function to remove files and directories 4372bad8471SEric Van Hensbergen * @inode: directory inode that is being deleted 4382bad8471SEric Van Hensbergen * @dentry: dentry that is being deleted 4392bad8471SEric Van Hensbergen * @rmdir: where we are a file or a directory 4402bad8471SEric Van Hensbergen * 4412bad8471SEric Van Hensbergen */ 4422bad8471SEric Van Hensbergen 4432bad8471SEric Van Hensbergen static int v9fs_remove(struct inode *dir, struct dentry *file, int rmdir) 4442bad8471SEric Van Hensbergen { 4452bad8471SEric Van Hensbergen struct v9fs_fcall *fcall = NULL; 4462bad8471SEric Van Hensbergen struct super_block *sb = NULL; 4472bad8471SEric Van Hensbergen struct v9fs_session_info *v9ses = NULL; 4482bad8471SEric Van Hensbergen struct v9fs_fid *v9fid = NULL; 4492bad8471SEric Van Hensbergen struct inode *file_inode = NULL; 4502bad8471SEric Van Hensbergen int fid = -1; 4512bad8471SEric Van Hensbergen int result = 0; 4522bad8471SEric Van Hensbergen 4532bad8471SEric Van Hensbergen dprintk(DEBUG_VFS, "inode: %p dentry: %p rmdir: %d\n", dir, file, 4542bad8471SEric Van Hensbergen rmdir); 4552bad8471SEric Van Hensbergen 4562bad8471SEric Van Hensbergen file_inode = file->d_inode; 4572bad8471SEric Van Hensbergen sb = file_inode->i_sb; 4582bad8471SEric Van Hensbergen v9ses = v9fs_inode2v9ses(file_inode); 4592bad8471SEric Van Hensbergen v9fid = v9fs_fid_lookup(file, FID_OP); 4602bad8471SEric Van Hensbergen 4612bad8471SEric Van Hensbergen if (!v9fid) { 4622bad8471SEric Van Hensbergen dprintk(DEBUG_ERROR, 4632bad8471SEric Van Hensbergen "no v9fs_fid\n"); 4642bad8471SEric Van Hensbergen return -EBADF; 4652bad8471SEric Van Hensbergen } 4662bad8471SEric Van Hensbergen 4672bad8471SEric Van Hensbergen fid = v9fid->fid; 4682bad8471SEric Van Hensbergen if (fid < 0) { 4692bad8471SEric Van Hensbergen dprintk(DEBUG_ERROR, "inode #%lu, no fid!\n", 4702bad8471SEric Van Hensbergen file_inode->i_ino); 4712bad8471SEric Van Hensbergen return -EBADF; 4722bad8471SEric Van Hensbergen } 4732bad8471SEric Van Hensbergen 4742bad8471SEric Van Hensbergen result = v9fs_t_remove(v9ses, fid, &fcall); 4752bad8471SEric Van Hensbergen if (result < 0) 4762bad8471SEric Van Hensbergen dprintk(DEBUG_ERROR, "remove of file fails: %s(%d)\n", 4772bad8471SEric Van Hensbergen FCALL_ERROR(fcall), result); 4782bad8471SEric Van Hensbergen else { 4792bad8471SEric Van Hensbergen v9fs_put_idpool(fid, &v9ses->fidpool); 4802bad8471SEric Van Hensbergen v9fs_fid_destroy(v9fid); 4812bad8471SEric Van Hensbergen } 4822bad8471SEric Van Hensbergen 4832bad8471SEric Van Hensbergen kfree(fcall); 4842bad8471SEric Van Hensbergen return result; 4852bad8471SEric Van Hensbergen } 4862bad8471SEric Van Hensbergen 4872bad8471SEric Van Hensbergen /** 4882bad8471SEric Van Hensbergen * v9fs_vfs_create - VFS hook to create files 4892bad8471SEric Van Hensbergen * @inode: directory inode that is being deleted 4902bad8471SEric Van Hensbergen * @dentry: dentry that is being deleted 4912bad8471SEric Van Hensbergen * @perm: create permissions 4922bad8471SEric Van Hensbergen * @nd: path information 4932bad8471SEric Van Hensbergen * 4942bad8471SEric Van Hensbergen */ 4952bad8471SEric Van Hensbergen 4962bad8471SEric Van Hensbergen static int 4972bad8471SEric Van Hensbergen v9fs_vfs_create(struct inode *inode, struct dentry *dentry, int perm, 4982bad8471SEric Van Hensbergen struct nameidata *nd) 4992bad8471SEric Van Hensbergen { 5002bad8471SEric Van Hensbergen return v9fs_create(inode, dentry, perm, O_RDWR); 5012bad8471SEric Van Hensbergen } 5022bad8471SEric Van Hensbergen 5032bad8471SEric Van Hensbergen /** 5042bad8471SEric Van Hensbergen * v9fs_vfs_mkdir - VFS mkdir hook to create a directory 5052bad8471SEric Van Hensbergen * @i: inode that is being unlinked 5062bad8471SEric Van Hensbergen * @dentry: dentry that is being unlinked 5072bad8471SEric Van Hensbergen * @mode: mode for new directory 5082bad8471SEric Van Hensbergen * 5092bad8471SEric Van Hensbergen */ 5102bad8471SEric Van Hensbergen 5112bad8471SEric Van Hensbergen static int v9fs_vfs_mkdir(struct inode *inode, struct dentry *dentry, int mode) 5122bad8471SEric Van Hensbergen { 5132bad8471SEric Van Hensbergen return v9fs_create(inode, dentry, mode | S_IFDIR, O_RDONLY); 5142bad8471SEric Van Hensbergen } 5152bad8471SEric Van Hensbergen 5162bad8471SEric Van Hensbergen /** 5172bad8471SEric Van Hensbergen * v9fs_vfs_lookup - VFS lookup hook to "walk" to a new inode 5182bad8471SEric Van Hensbergen * @dir: inode that is being walked from 5192bad8471SEric Van Hensbergen * @dentry: dentry that is being walked to? 5202bad8471SEric Van Hensbergen * @nameidata: path data 5212bad8471SEric Van Hensbergen * 5222bad8471SEric Van Hensbergen */ 5232bad8471SEric Van Hensbergen 5242bad8471SEric Van Hensbergen static struct dentry *v9fs_vfs_lookup(struct inode *dir, struct dentry *dentry, 5252bad8471SEric Van Hensbergen struct nameidata *nameidata) 5262bad8471SEric Van Hensbergen { 5272bad8471SEric Van Hensbergen struct super_block *sb; 5282bad8471SEric Van Hensbergen struct v9fs_session_info *v9ses; 5292bad8471SEric Van Hensbergen struct v9fs_fid *dirfid; 5302bad8471SEric Van Hensbergen struct v9fs_fid *fid; 5312bad8471SEric Van Hensbergen struct inode *inode; 5322bad8471SEric Van Hensbergen struct v9fs_fcall *fcall = NULL; 5332bad8471SEric Van Hensbergen struct stat newstat; 5342bad8471SEric Van Hensbergen int dirfidnum = -1; 5352bad8471SEric Van Hensbergen int newfid = -1; 5362bad8471SEric Van Hensbergen int result = 0; 5372bad8471SEric Van Hensbergen 5382bad8471SEric Van Hensbergen dprintk(DEBUG_VFS, "dir: %p dentry: (%s) %p nameidata: %p\n", 5392bad8471SEric Van Hensbergen dir, dentry->d_iname, dentry, nameidata); 5402bad8471SEric Van Hensbergen 5412bad8471SEric Van Hensbergen sb = dir->i_sb; 5422bad8471SEric Van Hensbergen v9ses = v9fs_inode2v9ses(dir); 5432bad8471SEric Van Hensbergen dirfid = v9fs_fid_lookup(dentry->d_parent, FID_WALK); 5442bad8471SEric Van Hensbergen 5452bad8471SEric Van Hensbergen if (!dirfid) { 5462bad8471SEric Van Hensbergen dprintk(DEBUG_ERROR, "no dirfid\n"); 5472bad8471SEric Van Hensbergen return ERR_PTR(-EINVAL); 5482bad8471SEric Van Hensbergen } 5492bad8471SEric Van Hensbergen 5502bad8471SEric Van Hensbergen dirfidnum = dirfid->fid; 5512bad8471SEric Van Hensbergen 5522bad8471SEric Van Hensbergen if (dirfidnum < 0) { 5532bad8471SEric Van Hensbergen dprintk(DEBUG_ERROR, "no dirfid for inode %p, #%lu\n", 5542bad8471SEric Van Hensbergen dir, dir->i_ino); 5552bad8471SEric Van Hensbergen return ERR_PTR(-EBADF); 5562bad8471SEric Van Hensbergen } 5572bad8471SEric Van Hensbergen 5582bad8471SEric Van Hensbergen newfid = v9fs_get_idpool(&v9ses->fidpool); 5592bad8471SEric Van Hensbergen if (newfid < 0) { 5602bad8471SEric Van Hensbergen eprintk(KERN_WARNING, "newfid fails!\n"); 5612bad8471SEric Van Hensbergen return ERR_PTR(-ENOSPC); 5622bad8471SEric Van Hensbergen } 5632bad8471SEric Van Hensbergen 5642bad8471SEric Van Hensbergen result = 5652bad8471SEric Van Hensbergen v9fs_t_walk(v9ses, dirfidnum, newfid, (char *)dentry->d_name.name, 5662bad8471SEric Van Hensbergen NULL); 5672bad8471SEric Van Hensbergen if (result < 0) { 5682bad8471SEric Van Hensbergen v9fs_put_idpool(newfid, &v9ses->fidpool); 5692bad8471SEric Van Hensbergen if (result == -ENOENT) { 5702bad8471SEric Van Hensbergen d_add(dentry, NULL); 5712bad8471SEric Van Hensbergen dprintk(DEBUG_ERROR, 5722bad8471SEric Van Hensbergen "Return negative dentry %p count %d\n", 5732bad8471SEric Van Hensbergen dentry, atomic_read(&dentry->d_count)); 5742bad8471SEric Van Hensbergen return NULL; 5752bad8471SEric Van Hensbergen } 5762bad8471SEric Van Hensbergen dprintk(DEBUG_ERROR, "walk error:%d\n", result); 5772bad8471SEric Van Hensbergen goto FreeFcall; 5782bad8471SEric Van Hensbergen } 5792bad8471SEric Van Hensbergen 5802bad8471SEric Van Hensbergen result = v9fs_t_stat(v9ses, newfid, &fcall); 5812bad8471SEric Van Hensbergen if (result < 0) { 5822bad8471SEric Van Hensbergen dprintk(DEBUG_ERROR, "stat error\n"); 5832bad8471SEric Van Hensbergen goto FreeFcall; 5842bad8471SEric Van Hensbergen } 5852bad8471SEric Van Hensbergen 5862bad8471SEric Van Hensbergen v9fs_mistat2unix(fcall->params.rstat.stat, &newstat, sb); 5872bad8471SEric Van Hensbergen inode = v9fs_get_inode(sb, newstat.st_mode); 5882bad8471SEric Van Hensbergen 5892bad8471SEric Van Hensbergen if (IS_ERR(inode) && (PTR_ERR(inode) == -ENOSPC)) { 5902bad8471SEric Van Hensbergen eprintk(KERN_WARNING, "inode alloc failes, returns %ld\n", 5912bad8471SEric Van Hensbergen PTR_ERR(inode)); 5922bad8471SEric Van Hensbergen 5932bad8471SEric Van Hensbergen result = -ENOSPC; 5942bad8471SEric Van Hensbergen goto FreeFcall; 5952bad8471SEric Van Hensbergen } 5962bad8471SEric Van Hensbergen 5972bad8471SEric Van Hensbergen inode->i_ino = v9fs_qid2ino(&fcall->params.rstat.stat->qid); 5982bad8471SEric Van Hensbergen 5992bad8471SEric Van Hensbergen fid = v9fs_fid_create(dentry); 6002bad8471SEric Van Hensbergen if (fid == NULL) { 6012bad8471SEric Van Hensbergen dprintk(DEBUG_ERROR, "couldn't insert\n"); 6022bad8471SEric Van Hensbergen result = -ENOMEM; 6032bad8471SEric Van Hensbergen goto FreeFcall; 6042bad8471SEric Van Hensbergen } 6052bad8471SEric Van Hensbergen 6062bad8471SEric Van Hensbergen fid->fid = newfid; 6072bad8471SEric Van Hensbergen fid->fidopen = 0; 6082bad8471SEric Van Hensbergen fid->v9ses = v9ses; 6092bad8471SEric Van Hensbergen fid->qid = fcall->params.rstat.stat->qid; 6102bad8471SEric Van Hensbergen 6112bad8471SEric Van Hensbergen dentry->d_op = &v9fs_dentry_operations; 6122bad8471SEric Van Hensbergen v9fs_mistat2inode(fcall->params.rstat.stat, inode, inode->i_sb); 6132bad8471SEric Van Hensbergen 6142bad8471SEric Van Hensbergen d_add(dentry, inode); 6152bad8471SEric Van Hensbergen kfree(fcall); 6162bad8471SEric Van Hensbergen 6172bad8471SEric Van Hensbergen return NULL; 6182bad8471SEric Van Hensbergen 6192bad8471SEric Van Hensbergen FreeFcall: 6202bad8471SEric Van Hensbergen kfree(fcall); 6212bad8471SEric Van Hensbergen return ERR_PTR(result); 6222bad8471SEric Van Hensbergen } 6232bad8471SEric Van Hensbergen 6242bad8471SEric Van Hensbergen /** 6252bad8471SEric Van Hensbergen * v9fs_vfs_unlink - VFS unlink hook to delete an inode 6262bad8471SEric Van Hensbergen * @i: inode that is being unlinked 6272bad8471SEric Van Hensbergen * @dentry: dentry that is being unlinked 6282bad8471SEric Van Hensbergen * 6292bad8471SEric Van Hensbergen */ 6302bad8471SEric Van Hensbergen 6312bad8471SEric Van Hensbergen static int v9fs_vfs_unlink(struct inode *i, struct dentry *d) 6322bad8471SEric Van Hensbergen { 6332bad8471SEric Van Hensbergen return v9fs_remove(i, d, 0); 6342bad8471SEric Van Hensbergen } 6352bad8471SEric Van Hensbergen 6362bad8471SEric Van Hensbergen /** 6372bad8471SEric Van Hensbergen * v9fs_vfs_rmdir - VFS unlink hook to delete a directory 6382bad8471SEric Van Hensbergen * @i: inode that is being unlinked 6392bad8471SEric Van Hensbergen * @dentry: dentry that is being unlinked 6402bad8471SEric Van Hensbergen * 6412bad8471SEric Van Hensbergen */ 6422bad8471SEric Van Hensbergen 6432bad8471SEric Van Hensbergen static int v9fs_vfs_rmdir(struct inode *i, struct dentry *d) 6442bad8471SEric Van Hensbergen { 6452bad8471SEric Van Hensbergen return v9fs_remove(i, d, 1); 6462bad8471SEric Van Hensbergen } 6472bad8471SEric Van Hensbergen 6482bad8471SEric Van Hensbergen /** 6492bad8471SEric Van Hensbergen * v9fs_vfs_rename - VFS hook to rename an inode 6502bad8471SEric Van Hensbergen * @old_dir: old dir inode 6512bad8471SEric Van Hensbergen * @old_dentry: old dentry 6522bad8471SEric Van Hensbergen * @new_dir: new dir inode 6532bad8471SEric Van Hensbergen * @new_dentry: new dentry 6542bad8471SEric Van Hensbergen * 6552bad8471SEric Van Hensbergen */ 6562bad8471SEric Van Hensbergen 6572bad8471SEric Van Hensbergen static int 6582bad8471SEric Van Hensbergen v9fs_vfs_rename(struct inode *old_dir, struct dentry *old_dentry, 6592bad8471SEric Van Hensbergen struct inode *new_dir, struct dentry *new_dentry) 6602bad8471SEric Van Hensbergen { 6612bad8471SEric Van Hensbergen struct inode *old_inode = old_dentry->d_inode; 6622bad8471SEric Van Hensbergen struct v9fs_session_info *v9ses = v9fs_inode2v9ses(old_inode); 6632bad8471SEric Van Hensbergen struct v9fs_fid *oldfid = v9fs_fid_lookup(old_dentry, FID_WALK); 6642bad8471SEric Van Hensbergen struct v9fs_fid *olddirfid = 6652bad8471SEric Van Hensbergen v9fs_fid_lookup(old_dentry->d_parent, FID_WALK); 6662bad8471SEric Van Hensbergen struct v9fs_fid *newdirfid = 6672bad8471SEric Van Hensbergen v9fs_fid_lookup(new_dentry->d_parent, FID_WALK); 6682bad8471SEric Van Hensbergen struct v9fs_stat *mistat = kmalloc(v9ses->maxdata, GFP_KERNEL); 6692bad8471SEric Van Hensbergen struct v9fs_fcall *fcall = NULL; 6702bad8471SEric Van Hensbergen int fid = -1; 6712bad8471SEric Van Hensbergen int olddirfidnum = -1; 6722bad8471SEric Van Hensbergen int newdirfidnum = -1; 6732bad8471SEric Van Hensbergen int retval = 0; 6742bad8471SEric Van Hensbergen 6752bad8471SEric Van Hensbergen dprintk(DEBUG_VFS, "\n"); 6762bad8471SEric Van Hensbergen 6772bad8471SEric Van Hensbergen if ((!oldfid) || (!olddirfid) || (!newdirfid)) { 6782bad8471SEric Van Hensbergen dprintk(DEBUG_ERROR, "problem with arguments\n"); 6792bad8471SEric Van Hensbergen return -EBADF; 6802bad8471SEric Van Hensbergen } 6812bad8471SEric Van Hensbergen 6822bad8471SEric Van Hensbergen /* 9P can only handle file rename in the same directory */ 6832bad8471SEric Van Hensbergen if (memcmp(&olddirfid->qid, &newdirfid->qid, sizeof(newdirfid->qid))) { 6842bad8471SEric Van Hensbergen dprintk(DEBUG_ERROR, "old dir and new dir are different\n"); 6852bad8471SEric Van Hensbergen retval = -EPERM; 6862bad8471SEric Van Hensbergen goto FreeFcallnBail; 6872bad8471SEric Van Hensbergen } 6882bad8471SEric Van Hensbergen 6892bad8471SEric Van Hensbergen fid = oldfid->fid; 6902bad8471SEric Van Hensbergen olddirfidnum = olddirfid->fid; 6912bad8471SEric Van Hensbergen newdirfidnum = newdirfid->fid; 6922bad8471SEric Van Hensbergen 6932bad8471SEric Van Hensbergen if (fid < 0) { 6942bad8471SEric Van Hensbergen dprintk(DEBUG_ERROR, "no fid for old file #%lu\n", 6952bad8471SEric Van Hensbergen old_inode->i_ino); 6962bad8471SEric Van Hensbergen retval = -EBADF; 6972bad8471SEric Van Hensbergen goto FreeFcallnBail; 6982bad8471SEric Van Hensbergen } 6992bad8471SEric Van Hensbergen 7002bad8471SEric Van Hensbergen v9fs_blank_mistat(v9ses, mistat); 7012bad8471SEric Van Hensbergen 7022bad8471SEric Van Hensbergen strcpy(mistat->data + 1, v9ses->name); 7032bad8471SEric Van Hensbergen mistat->name = mistat->data + 1 + strlen(v9ses->name); 7042bad8471SEric Van Hensbergen 7052bad8471SEric Van Hensbergen if (new_dentry->d_name.len > 7062bad8471SEric Van Hensbergen (v9ses->maxdata - strlen(v9ses->name) - sizeof(struct v9fs_stat))) { 7072bad8471SEric Van Hensbergen dprintk(DEBUG_ERROR, "new name too long\n"); 7082bad8471SEric Van Hensbergen goto FreeFcallnBail; 7092bad8471SEric Van Hensbergen } 7102bad8471SEric Van Hensbergen 7112bad8471SEric Van Hensbergen strcpy(mistat->name, new_dentry->d_name.name); 7122bad8471SEric Van Hensbergen retval = v9fs_t_wstat(v9ses, fid, mistat, &fcall); 7132bad8471SEric Van Hensbergen 7142bad8471SEric Van Hensbergen FreeFcallnBail: 7152bad8471SEric Van Hensbergen kfree(mistat); 7162bad8471SEric Van Hensbergen 7172bad8471SEric Van Hensbergen if (retval < 0) 7182bad8471SEric Van Hensbergen dprintk(DEBUG_ERROR, "v9fs_t_wstat error: %s\n", 7192bad8471SEric Van Hensbergen FCALL_ERROR(fcall)); 7202bad8471SEric Van Hensbergen 7212bad8471SEric Van Hensbergen kfree(fcall); 7222bad8471SEric Van Hensbergen return retval; 7232bad8471SEric Van Hensbergen } 7242bad8471SEric Van Hensbergen 7252bad8471SEric Van Hensbergen /** 7262bad8471SEric Van Hensbergen * v9fs_vfs_getattr - retreive file metadata 7272bad8471SEric Van Hensbergen * @mnt - mount information 7282bad8471SEric Van Hensbergen * @dentry - file to get attributes on 7292bad8471SEric Van Hensbergen * @stat - metadata structure to populate 7302bad8471SEric Van Hensbergen * 7312bad8471SEric Van Hensbergen */ 7322bad8471SEric Van Hensbergen 7332bad8471SEric Van Hensbergen static int 7342bad8471SEric Van Hensbergen v9fs_vfs_getattr(struct vfsmount *mnt, struct dentry *dentry, 7352bad8471SEric Van Hensbergen struct kstat *stat) 7362bad8471SEric Van Hensbergen { 7372bad8471SEric Van Hensbergen struct v9fs_fcall *fcall = NULL; 7382bad8471SEric Van Hensbergen struct v9fs_session_info *v9ses = v9fs_inode2v9ses(dentry->d_inode); 7392bad8471SEric Van Hensbergen struct v9fs_fid *fid = v9fs_fid_lookup(dentry, FID_OP); 7402bad8471SEric Van Hensbergen int err = -EPERM; 7412bad8471SEric Van Hensbergen 7422bad8471SEric Van Hensbergen dprintk(DEBUG_VFS, "dentry: %p\n", dentry); 7432bad8471SEric Van Hensbergen if (!fid) { 7442bad8471SEric Van Hensbergen dprintk(DEBUG_ERROR, 7452bad8471SEric Van Hensbergen "couldn't find fid associated with dentry\n"); 7462bad8471SEric Van Hensbergen return -EBADF; 7472bad8471SEric Van Hensbergen } 7482bad8471SEric Van Hensbergen 7492bad8471SEric Van Hensbergen err = v9fs_t_stat(v9ses, fid->fid, &fcall); 7502bad8471SEric Van Hensbergen 7512bad8471SEric Van Hensbergen if (err < 0) 7522bad8471SEric Van Hensbergen dprintk(DEBUG_ERROR, "stat error\n"); 7532bad8471SEric Van Hensbergen else { 7542bad8471SEric Van Hensbergen v9fs_mistat2inode(fcall->params.rstat.stat, dentry->d_inode, 7552bad8471SEric Van Hensbergen dentry->d_inode->i_sb); 7562bad8471SEric Van Hensbergen generic_fillattr(dentry->d_inode, stat); 7572bad8471SEric Van Hensbergen } 7582bad8471SEric Van Hensbergen 7592bad8471SEric Van Hensbergen kfree(fcall); 7602bad8471SEric Van Hensbergen return err; 7612bad8471SEric Van Hensbergen } 7622bad8471SEric Van Hensbergen 7632bad8471SEric Van Hensbergen /** 7642bad8471SEric Van Hensbergen * v9fs_vfs_setattr - set file metadata 7652bad8471SEric Van Hensbergen * @dentry: file whose metadata to set 7662bad8471SEric Van Hensbergen * @iattr: metadata assignment structure 7672bad8471SEric Van Hensbergen * 7682bad8471SEric Van Hensbergen */ 7692bad8471SEric Van Hensbergen 7702bad8471SEric Van Hensbergen static int v9fs_vfs_setattr(struct dentry *dentry, struct iattr *iattr) 7712bad8471SEric Van Hensbergen { 7722bad8471SEric Van Hensbergen struct v9fs_session_info *v9ses = v9fs_inode2v9ses(dentry->d_inode); 7732bad8471SEric Van Hensbergen struct v9fs_fid *fid = v9fs_fid_lookup(dentry, FID_OP); 7742bad8471SEric Van Hensbergen struct v9fs_stat *mistat = kmalloc(v9ses->maxdata, GFP_KERNEL); 7752bad8471SEric Van Hensbergen struct v9fs_fcall *fcall = NULL; 7762bad8471SEric Van Hensbergen int res = -EPERM; 7772bad8471SEric Van Hensbergen 7782bad8471SEric Van Hensbergen dprintk(DEBUG_VFS, "\n"); 7792bad8471SEric Van Hensbergen if (!fid) { 7802bad8471SEric Van Hensbergen dprintk(DEBUG_ERROR, 7812bad8471SEric Van Hensbergen "Couldn't find fid associated with dentry\n"); 7822bad8471SEric Van Hensbergen return -EBADF; 7832bad8471SEric Van Hensbergen } 7842bad8471SEric Van Hensbergen 7852bad8471SEric Van Hensbergen if (!mistat) 7862bad8471SEric Van Hensbergen return -ENOMEM; 7872bad8471SEric Van Hensbergen 7882bad8471SEric Van Hensbergen v9fs_blank_mistat(v9ses, mistat); 7892bad8471SEric Van Hensbergen if (iattr->ia_valid & ATTR_MODE) 7902bad8471SEric Van Hensbergen mistat->mode = unixmode2p9mode(v9ses, iattr->ia_mode); 7912bad8471SEric Van Hensbergen 7922bad8471SEric Van Hensbergen if (iattr->ia_valid & ATTR_MTIME) 7932bad8471SEric Van Hensbergen mistat->mtime = iattr->ia_mtime.tv_sec; 7942bad8471SEric Van Hensbergen 7952bad8471SEric Van Hensbergen if (iattr->ia_valid & ATTR_ATIME) 7962bad8471SEric Van Hensbergen mistat->atime = iattr->ia_atime.tv_sec; 7972bad8471SEric Van Hensbergen 7982bad8471SEric Van Hensbergen if (iattr->ia_valid & ATTR_SIZE) 7992bad8471SEric Van Hensbergen mistat->length = iattr->ia_size; 8002bad8471SEric Van Hensbergen 8012bad8471SEric Van Hensbergen if (v9ses->extended) { 8022bad8471SEric Van Hensbergen char *uid = kmalloc(strlen(mistat->uid), GFP_KERNEL); 8032bad8471SEric Van Hensbergen char *gid = kmalloc(strlen(mistat->gid), GFP_KERNEL); 8042bad8471SEric Van Hensbergen char *muid = kmalloc(strlen(mistat->muid), GFP_KERNEL); 8052bad8471SEric Van Hensbergen char *name = kmalloc(strlen(mistat->name), GFP_KERNEL); 8062bad8471SEric Van Hensbergen char *extension = kmalloc(strlen(mistat->extension), 8072bad8471SEric Van Hensbergen GFP_KERNEL); 8082bad8471SEric Van Hensbergen 8092bad8471SEric Van Hensbergen if ((!uid) || (!gid) || (!muid) || (!name) || (!extension)) { 8102bad8471SEric Van Hensbergen kfree(uid); 8112bad8471SEric Van Hensbergen kfree(gid); 8122bad8471SEric Van Hensbergen kfree(muid); 8132bad8471SEric Van Hensbergen kfree(name); 8142bad8471SEric Van Hensbergen kfree(extension); 8152bad8471SEric Van Hensbergen 8162bad8471SEric Van Hensbergen return -ENOMEM; 8172bad8471SEric Van Hensbergen } 8182bad8471SEric Van Hensbergen 8192bad8471SEric Van Hensbergen strcpy(uid, mistat->uid); 8202bad8471SEric Van Hensbergen strcpy(gid, mistat->gid); 8212bad8471SEric Van Hensbergen strcpy(muid, mistat->muid); 8222bad8471SEric Van Hensbergen strcpy(name, mistat->name); 8232bad8471SEric Van Hensbergen strcpy(extension, mistat->extension); 8242bad8471SEric Van Hensbergen 8252bad8471SEric Van Hensbergen if (iattr->ia_valid & ATTR_UID) { 8262bad8471SEric Van Hensbergen if (strlen(uid) != 8) { 8272bad8471SEric Van Hensbergen dprintk(DEBUG_ERROR, "uid strlen is %u not 8\n", 8282bad8471SEric Van Hensbergen (unsigned int)strlen(uid)); 8292bad8471SEric Van Hensbergen sprintf(uid, "%08x", iattr->ia_uid); 8302bad8471SEric Van Hensbergen } else { 8312bad8471SEric Van Hensbergen kfree(uid); 8322bad8471SEric Van Hensbergen uid = kmalloc(9, GFP_KERNEL); 8332bad8471SEric Van Hensbergen } 8342bad8471SEric Van Hensbergen 8352bad8471SEric Van Hensbergen sprintf(uid, "%08x", iattr->ia_uid); 8362bad8471SEric Van Hensbergen mistat->n_uid = iattr->ia_uid; 8372bad8471SEric Van Hensbergen } 8382bad8471SEric Van Hensbergen 8392bad8471SEric Van Hensbergen if (iattr->ia_valid & ATTR_GID) { 8402bad8471SEric Van Hensbergen if (strlen(gid) != 8) 8412bad8471SEric Van Hensbergen dprintk(DEBUG_ERROR, "gid strlen is %u not 8\n", 8422bad8471SEric Van Hensbergen (unsigned int)strlen(gid)); 8432bad8471SEric Van Hensbergen else { 8442bad8471SEric Van Hensbergen kfree(gid); 8452bad8471SEric Van Hensbergen gid = kmalloc(9, GFP_KERNEL); 8462bad8471SEric Van Hensbergen } 8472bad8471SEric Van Hensbergen 8482bad8471SEric Van Hensbergen sprintf(gid, "%08x", iattr->ia_gid); 8492bad8471SEric Van Hensbergen mistat->n_gid = iattr->ia_gid; 8502bad8471SEric Van Hensbergen } 8512bad8471SEric Van Hensbergen 8522bad8471SEric Van Hensbergen mistat->uid = mistat->data; 8532bad8471SEric Van Hensbergen strcpy(mistat->uid, uid); 8542bad8471SEric Van Hensbergen mistat->gid = mistat->data + strlen(uid) + 1; 8552bad8471SEric Van Hensbergen strcpy(mistat->gid, gid); 8562bad8471SEric Van Hensbergen mistat->muid = mistat->gid + strlen(gid) + 1; 8572bad8471SEric Van Hensbergen strcpy(mistat->muid, muid); 8582bad8471SEric Van Hensbergen mistat->name = mistat->muid + strlen(muid) + 1; 8592bad8471SEric Van Hensbergen strcpy(mistat->name, name); 8602bad8471SEric Van Hensbergen mistat->extension = mistat->name + strlen(name) + 1; 8612bad8471SEric Van Hensbergen strcpy(mistat->extension, extension); 8622bad8471SEric Van Hensbergen 8632bad8471SEric Van Hensbergen kfree(uid); 8642bad8471SEric Van Hensbergen kfree(gid); 8652bad8471SEric Van Hensbergen kfree(muid); 8662bad8471SEric Van Hensbergen kfree(name); 8672bad8471SEric Van Hensbergen kfree(extension); 8682bad8471SEric Van Hensbergen } 8692bad8471SEric Van Hensbergen 8702bad8471SEric Van Hensbergen res = v9fs_t_wstat(v9ses, fid->fid, mistat, &fcall); 8712bad8471SEric Van Hensbergen 8722bad8471SEric Van Hensbergen if (res < 0) 8732bad8471SEric Van Hensbergen dprintk(DEBUG_ERROR, "wstat error: %s\n", FCALL_ERROR(fcall)); 8742bad8471SEric Van Hensbergen 8752bad8471SEric Van Hensbergen kfree(mistat); 8762bad8471SEric Van Hensbergen kfree(fcall); 8772bad8471SEric Van Hensbergen 8782bad8471SEric Van Hensbergen if (res >= 0) 8792bad8471SEric Van Hensbergen res = inode_setattr(dentry->d_inode, iattr); 8802bad8471SEric Van Hensbergen 8812bad8471SEric Van Hensbergen return res; 8822bad8471SEric Van Hensbergen } 8832bad8471SEric Van Hensbergen 8842bad8471SEric Van Hensbergen /** 8852bad8471SEric Van Hensbergen * v9fs_mistat2inode - populate an inode structure with mistat info 8862bad8471SEric Van Hensbergen * @mistat: Plan 9 metadata (mistat) structure 8872bad8471SEric Van Hensbergen * @inode: inode to populate 8882bad8471SEric Van Hensbergen * @sb: superblock of filesystem 8892bad8471SEric Van Hensbergen * 8902bad8471SEric Van Hensbergen */ 8912bad8471SEric Van Hensbergen 8922bad8471SEric Van Hensbergen void 8932bad8471SEric Van Hensbergen v9fs_mistat2inode(struct v9fs_stat *mistat, struct inode *inode, 8942bad8471SEric Van Hensbergen struct super_block *sb) 8952bad8471SEric Van Hensbergen { 8962bad8471SEric Van Hensbergen struct v9fs_session_info *v9ses = sb->s_fs_info; 8972bad8471SEric Van Hensbergen 8982bad8471SEric Van Hensbergen inode->i_nlink = 1; 8992bad8471SEric Van Hensbergen 9002bad8471SEric Van Hensbergen inode->i_atime.tv_sec = mistat->atime; 9012bad8471SEric Van Hensbergen inode->i_mtime.tv_sec = mistat->mtime; 9022bad8471SEric Van Hensbergen inode->i_ctime.tv_sec = mistat->mtime; 9032bad8471SEric Van Hensbergen 9042bad8471SEric Van Hensbergen inode->i_uid = -1; 9052bad8471SEric Van Hensbergen inode->i_gid = -1; 9062bad8471SEric Van Hensbergen 9072bad8471SEric Van Hensbergen if (v9ses->extended) { 9082bad8471SEric Van Hensbergen /* TODO: string to uid mapping via user-space daemon */ 9092bad8471SEric Van Hensbergen inode->i_uid = mistat->n_uid; 9102bad8471SEric Van Hensbergen inode->i_gid = mistat->n_gid; 9112bad8471SEric Van Hensbergen 9122bad8471SEric Van Hensbergen if (mistat->n_uid == -1) 9132bad8471SEric Van Hensbergen sscanf(mistat->uid, "%x", &inode->i_uid); 9142bad8471SEric Van Hensbergen 9152bad8471SEric Van Hensbergen if (mistat->n_gid == -1) 9162bad8471SEric Van Hensbergen sscanf(mistat->gid, "%x", &inode->i_gid); 9172bad8471SEric Van Hensbergen } 9182bad8471SEric Van Hensbergen 9192bad8471SEric Van Hensbergen if (inode->i_uid == -1) 9202bad8471SEric Van Hensbergen inode->i_uid = v9ses->uid; 9212bad8471SEric Van Hensbergen if (inode->i_gid == -1) 9222bad8471SEric Van Hensbergen inode->i_gid = v9ses->gid; 9232bad8471SEric Van Hensbergen 9242bad8471SEric Van Hensbergen inode->i_mode = p9mode2unixmode(v9ses, mistat->mode); 9252bad8471SEric Van Hensbergen if ((S_ISBLK(inode->i_mode)) || (S_ISCHR(inode->i_mode))) { 9262bad8471SEric Van Hensbergen char type = 0; 9272bad8471SEric Van Hensbergen int major = -1; 9282bad8471SEric Van Hensbergen int minor = -1; 9292bad8471SEric Van Hensbergen sscanf(mistat->extension, "%c %u %u", &type, &major, &minor); 9302bad8471SEric Van Hensbergen switch (type) { 9312bad8471SEric Van Hensbergen case 'c': 9322bad8471SEric Van Hensbergen inode->i_mode &= ~S_IFBLK; 9332bad8471SEric Van Hensbergen inode->i_mode |= S_IFCHR; 9342bad8471SEric Van Hensbergen break; 9352bad8471SEric Van Hensbergen case 'b': 9362bad8471SEric Van Hensbergen break; 9372bad8471SEric Van Hensbergen default: 9382bad8471SEric Van Hensbergen dprintk(DEBUG_ERROR, "Unknown special type %c (%s)\n", 9392bad8471SEric Van Hensbergen type, mistat->extension); 9402bad8471SEric Van Hensbergen }; 9412bad8471SEric Van Hensbergen inode->i_rdev = MKDEV(major, minor); 9422bad8471SEric Van Hensbergen } else 9432bad8471SEric Van Hensbergen inode->i_rdev = 0; 9442bad8471SEric Van Hensbergen 9452bad8471SEric Van Hensbergen inode->i_size = mistat->length; 9462bad8471SEric Van Hensbergen 9472bad8471SEric Van Hensbergen inode->i_blksize = sb->s_blocksize; 9482bad8471SEric Van Hensbergen inode->i_blocks = 9492bad8471SEric Van Hensbergen (inode->i_size + inode->i_blksize - 1) >> sb->s_blocksize_bits; 9502bad8471SEric Van Hensbergen } 9512bad8471SEric Van Hensbergen 9522bad8471SEric Van Hensbergen /** 9532bad8471SEric Van Hensbergen * v9fs_qid2ino - convert qid into inode number 9542bad8471SEric Van Hensbergen * @qid: qid to hash 9552bad8471SEric Van Hensbergen * 9562bad8471SEric Van Hensbergen * BUG: potential for inode number collisions? 9572bad8471SEric Van Hensbergen */ 9582bad8471SEric Van Hensbergen 9592bad8471SEric Van Hensbergen ino_t v9fs_qid2ino(struct v9fs_qid *qid) 9602bad8471SEric Van Hensbergen { 9612bad8471SEric Van Hensbergen u64 path = qid->path + 2; 9622bad8471SEric Van Hensbergen ino_t i = 0; 9632bad8471SEric Van Hensbergen 9642bad8471SEric Van Hensbergen if (sizeof(ino_t) == sizeof(path)) 9652bad8471SEric Van Hensbergen memcpy(&i, &path, sizeof(ino_t)); 9662bad8471SEric Van Hensbergen else 9672bad8471SEric Van Hensbergen i = (ino_t) (path ^ (path >> 32)); 9682bad8471SEric Van Hensbergen 9692bad8471SEric Van Hensbergen return i; 9702bad8471SEric Van Hensbergen } 9712bad8471SEric Van Hensbergen 9722bad8471SEric Van Hensbergen /** 9732bad8471SEric Van Hensbergen * v9fs_vfs_symlink - helper function to create symlinks 9742bad8471SEric Van Hensbergen * @dir: directory inode containing symlink 9752bad8471SEric Van Hensbergen * @dentry: dentry for symlink 9762bad8471SEric Van Hensbergen * @symname: symlink data 9772bad8471SEric Van Hensbergen * 9782bad8471SEric Van Hensbergen * See 9P2000.u RFC for more information 9792bad8471SEric Van Hensbergen * 9802bad8471SEric Van Hensbergen */ 9812bad8471SEric Van Hensbergen 9822bad8471SEric Van Hensbergen static int 9832bad8471SEric Van Hensbergen v9fs_vfs_symlink(struct inode *dir, struct dentry *dentry, const char *symname) 9842bad8471SEric Van Hensbergen { 9852bad8471SEric Van Hensbergen int retval = -EPERM; 9862bad8471SEric Van Hensbergen struct v9fs_fid *newfid; 9872bad8471SEric Van Hensbergen struct v9fs_session_info *v9ses = v9fs_inode2v9ses(dir); 9882bad8471SEric Van Hensbergen struct super_block *sb = dir ? dir->i_sb : NULL; 9892bad8471SEric Van Hensbergen struct v9fs_fcall *fcall = NULL; 9902bad8471SEric Van Hensbergen struct v9fs_stat *mistat = kmalloc(v9ses->maxdata, GFP_KERNEL); 9912bad8471SEric Van Hensbergen 9922bad8471SEric Van Hensbergen dprintk(DEBUG_VFS, " %lu,%s,%s\n", dir->i_ino, dentry->d_name.name, 9932bad8471SEric Van Hensbergen symname); 9942bad8471SEric Van Hensbergen 9952bad8471SEric Van Hensbergen if ((!dentry) || (!sb) || (!v9ses)) { 9962bad8471SEric Van Hensbergen dprintk(DEBUG_ERROR, "problem with arguments\n"); 9972bad8471SEric Van Hensbergen return -EBADF; 9982bad8471SEric Van Hensbergen } 9992bad8471SEric Van Hensbergen 10002bad8471SEric Van Hensbergen if (!v9ses->extended) { 10012bad8471SEric Van Hensbergen dprintk(DEBUG_ERROR, "not extended\n"); 10022bad8471SEric Van Hensbergen goto FreeFcall; 10032bad8471SEric Van Hensbergen } 10042bad8471SEric Van Hensbergen 10052bad8471SEric Van Hensbergen /* issue a create */ 10062bad8471SEric Van Hensbergen retval = v9fs_create(dir, dentry, S_IFLNK, 0); 10072bad8471SEric Van Hensbergen if (retval != 0) 10082bad8471SEric Van Hensbergen goto FreeFcall; 10092bad8471SEric Van Hensbergen 10102bad8471SEric Van Hensbergen newfid = v9fs_fid_lookup(dentry, FID_OP); 10112bad8471SEric Van Hensbergen 10122bad8471SEric Van Hensbergen /* issue a twstat */ 10132bad8471SEric Van Hensbergen v9fs_blank_mistat(v9ses, mistat); 10142bad8471SEric Van Hensbergen strcpy(mistat->data + 1, symname); 10152bad8471SEric Van Hensbergen mistat->extension = mistat->data + 1; 10162bad8471SEric Van Hensbergen retval = v9fs_t_wstat(v9ses, newfid->fid, mistat, &fcall); 10172bad8471SEric Van Hensbergen if (retval < 0) { 10182bad8471SEric Van Hensbergen dprintk(DEBUG_ERROR, "v9fs_t_wstat error: %s\n", 10192bad8471SEric Van Hensbergen FCALL_ERROR(fcall)); 10202bad8471SEric Van Hensbergen goto FreeFcall; 10212bad8471SEric Van Hensbergen } 10222bad8471SEric Van Hensbergen 10232bad8471SEric Van Hensbergen kfree(fcall); 10242bad8471SEric Van Hensbergen 10252bad8471SEric Van Hensbergen if (v9fs_t_clunk(v9ses, newfid->fid, &fcall)) { 10262bad8471SEric Van Hensbergen dprintk(DEBUG_ERROR, "clunk for symlink failed: %s\n", 10272bad8471SEric Van Hensbergen FCALL_ERROR(fcall)); 10282bad8471SEric Van Hensbergen goto FreeFcall; 10292bad8471SEric Van Hensbergen } 10302bad8471SEric Van Hensbergen 10312bad8471SEric Van Hensbergen d_drop(dentry); /* FID - will this also clunk? */ 10322bad8471SEric Van Hensbergen 10332bad8471SEric Van Hensbergen FreeFcall: 10342bad8471SEric Van Hensbergen kfree(mistat); 10352bad8471SEric Van Hensbergen kfree(fcall); 10362bad8471SEric Van Hensbergen 10372bad8471SEric Van Hensbergen return retval; 10382bad8471SEric Van Hensbergen } 10392bad8471SEric Van Hensbergen 10402bad8471SEric Van Hensbergen /** 10412bad8471SEric Van Hensbergen * v9fs_readlink - read a symlink's location (internal version) 10422bad8471SEric Van Hensbergen * @dentry: dentry for symlink 10432bad8471SEric Van Hensbergen * @buf: buffer to load symlink location into 10442bad8471SEric Van Hensbergen * @buflen: length of buffer 10452bad8471SEric Van Hensbergen * 10462bad8471SEric Van Hensbergen */ 10472bad8471SEric Van Hensbergen 10482bad8471SEric Van Hensbergen static int v9fs_readlink(struct dentry *dentry, char *buffer, int buflen) 10492bad8471SEric Van Hensbergen { 10502bad8471SEric Van Hensbergen int retval = -EPERM; 10512bad8471SEric Van Hensbergen 10522bad8471SEric Van Hensbergen struct v9fs_fcall *fcall = NULL; 10532bad8471SEric Van Hensbergen struct v9fs_session_info *v9ses = v9fs_inode2v9ses(dentry->d_inode); 10542bad8471SEric Van Hensbergen struct v9fs_fid *fid = v9fs_fid_lookup(dentry, FID_OP); 10552bad8471SEric Van Hensbergen 10562bad8471SEric Van Hensbergen if (!fid) { 10572bad8471SEric Van Hensbergen dprintk(DEBUG_ERROR, "could not resolve fid from dentry\n"); 10582bad8471SEric Van Hensbergen retval = -EBADF; 10592bad8471SEric Van Hensbergen goto FreeFcall; 10602bad8471SEric Van Hensbergen } 10612bad8471SEric Van Hensbergen 10622bad8471SEric Van Hensbergen if (!v9ses->extended) { 10632bad8471SEric Van Hensbergen retval = -EBADF; 10642bad8471SEric Van Hensbergen dprintk(DEBUG_ERROR, "not extended\n"); 10652bad8471SEric Van Hensbergen goto FreeFcall; 10662bad8471SEric Van Hensbergen } 10672bad8471SEric Van Hensbergen 10682bad8471SEric Van Hensbergen dprintk(DEBUG_VFS, " %s\n", dentry->d_name.name); 10692bad8471SEric Van Hensbergen retval = v9fs_t_stat(v9ses, fid->fid, &fcall); 10702bad8471SEric Van Hensbergen 10712bad8471SEric Van Hensbergen if (retval < 0) { 10722bad8471SEric Van Hensbergen dprintk(DEBUG_ERROR, "stat error\n"); 10732bad8471SEric Van Hensbergen goto FreeFcall; 10742bad8471SEric Van Hensbergen } 10752bad8471SEric Van Hensbergen 10762bad8471SEric Van Hensbergen if (!fcall) 10772bad8471SEric Van Hensbergen return -EIO; 10782bad8471SEric Van Hensbergen 10792bad8471SEric Van Hensbergen if (!(fcall->params.rstat.stat->mode & V9FS_DMSYMLINK)) { 10802bad8471SEric Van Hensbergen retval = -EINVAL; 10812bad8471SEric Van Hensbergen goto FreeFcall; 10822bad8471SEric Van Hensbergen } 10832bad8471SEric Van Hensbergen 10842bad8471SEric Van Hensbergen /* copy extension buffer into buffer */ 10852bad8471SEric Van Hensbergen if (strlen(fcall->params.rstat.stat->extension) < buflen) 10862bad8471SEric Van Hensbergen buflen = strlen(fcall->params.rstat.stat->extension); 10872bad8471SEric Van Hensbergen 10882bad8471SEric Van Hensbergen memcpy(buffer, fcall->params.rstat.stat->extension, buflen + 1); 10892bad8471SEric Van Hensbergen 10902bad8471SEric Van Hensbergen retval = buflen; 10912bad8471SEric Van Hensbergen 10922bad8471SEric Van Hensbergen FreeFcall: 10932bad8471SEric Van Hensbergen kfree(fcall); 10942bad8471SEric Van Hensbergen 10952bad8471SEric Van Hensbergen return retval; 10962bad8471SEric Van Hensbergen } 10972bad8471SEric Van Hensbergen 10982bad8471SEric Van Hensbergen /** 10992bad8471SEric Van Hensbergen * v9fs_vfs_readlink - read a symlink's location 11002bad8471SEric Van Hensbergen * @dentry: dentry for symlink 11012bad8471SEric Van Hensbergen * @buf: buffer to load symlink location into 11022bad8471SEric Van Hensbergen * @buflen: length of buffer 11032bad8471SEric Van Hensbergen * 11042bad8471SEric Van Hensbergen */ 11052bad8471SEric Van Hensbergen 11062bad8471SEric Van Hensbergen static int v9fs_vfs_readlink(struct dentry *dentry, char __user * buffer, 11072bad8471SEric Van Hensbergen int buflen) 11082bad8471SEric Van Hensbergen { 11092bad8471SEric Van Hensbergen int retval; 11102bad8471SEric Van Hensbergen int ret; 11112bad8471SEric Van Hensbergen char *link = __getname(); 11122bad8471SEric Van Hensbergen 11132bad8471SEric Van Hensbergen if (strlen(link) < buflen) 11142bad8471SEric Van Hensbergen buflen = strlen(link); 11152bad8471SEric Van Hensbergen 11162bad8471SEric Van Hensbergen dprintk(DEBUG_VFS, " dentry: %s (%p)\n", dentry->d_iname, dentry); 11172bad8471SEric Van Hensbergen 11182bad8471SEric Van Hensbergen retval = v9fs_readlink(dentry, link, buflen); 11192bad8471SEric Van Hensbergen 11202bad8471SEric Van Hensbergen if (retval > 0) { 11212bad8471SEric Van Hensbergen if ((ret = copy_to_user(buffer, link, retval)) != 0) { 11222bad8471SEric Van Hensbergen dprintk(DEBUG_ERROR, "problem copying to user: %d\n", 11232bad8471SEric Van Hensbergen ret); 11242bad8471SEric Van Hensbergen retval = ret; 11252bad8471SEric Van Hensbergen } 11262bad8471SEric Van Hensbergen } 11272bad8471SEric Van Hensbergen 11282bad8471SEric Van Hensbergen putname(link); 11292bad8471SEric Van Hensbergen return retval; 11302bad8471SEric Van Hensbergen } 11312bad8471SEric Van Hensbergen 11322bad8471SEric Van Hensbergen /** 11332bad8471SEric Van Hensbergen * v9fs_vfs_follow_link - follow a symlink path 11342bad8471SEric Van Hensbergen * @dentry: dentry for symlink 11352bad8471SEric Van Hensbergen * @nd: nameidata 11362bad8471SEric Van Hensbergen * 11372bad8471SEric Van Hensbergen */ 11382bad8471SEric Van Hensbergen 11392bad8471SEric Van Hensbergen static void *v9fs_vfs_follow_link(struct dentry *dentry, struct nameidata *nd) 11402bad8471SEric Van Hensbergen { 11412bad8471SEric Van Hensbergen int len = 0; 11422bad8471SEric Van Hensbergen char *link = __getname(); 11432bad8471SEric Van Hensbergen 11442bad8471SEric Van Hensbergen dprintk(DEBUG_VFS, "%s n", dentry->d_name.name); 11452bad8471SEric Van Hensbergen 11462bad8471SEric Van Hensbergen if (!link) 11472bad8471SEric Van Hensbergen link = ERR_PTR(-ENOMEM); 11482bad8471SEric Van Hensbergen else { 11492bad8471SEric Van Hensbergen len = v9fs_readlink(dentry, link, strlen(link)); 11502bad8471SEric Van Hensbergen 11512bad8471SEric Van Hensbergen if (len < 0) { 11522bad8471SEric Van Hensbergen putname(link); 11532bad8471SEric Van Hensbergen link = ERR_PTR(len); 11542bad8471SEric Van Hensbergen } else 11552bad8471SEric Van Hensbergen link[len] = 0; 11562bad8471SEric Van Hensbergen } 11572bad8471SEric Van Hensbergen nd_set_link(nd, link); 11582bad8471SEric Van Hensbergen 11592bad8471SEric Van Hensbergen return NULL; 11602bad8471SEric Van Hensbergen } 11612bad8471SEric Van Hensbergen 11622bad8471SEric Van Hensbergen /** 11632bad8471SEric Van Hensbergen * v9fs_vfs_put_link - release a symlink path 11642bad8471SEric Van Hensbergen * @dentry: dentry for symlink 11652bad8471SEric Van Hensbergen * @nd: nameidata 11662bad8471SEric Van Hensbergen * 11672bad8471SEric Van Hensbergen */ 11682bad8471SEric Van Hensbergen 11692bad8471SEric Van Hensbergen static void v9fs_vfs_put_link(struct dentry *dentry, struct nameidata *nd, void *p) 11702bad8471SEric Van Hensbergen { 11712bad8471SEric Van Hensbergen char *s = nd_get_link(nd); 11722bad8471SEric Van Hensbergen 11732bad8471SEric Van Hensbergen dprintk(DEBUG_VFS, " %s %s\n", dentry->d_name.name, s); 11742bad8471SEric Van Hensbergen if (!IS_ERR(s)) 11752bad8471SEric Van Hensbergen putname(s); 11762bad8471SEric Van Hensbergen } 11772bad8471SEric Van Hensbergen 11782bad8471SEric Van Hensbergen /** 11792bad8471SEric Van Hensbergen * v9fs_vfs_link - create a hardlink 11802bad8471SEric Van Hensbergen * @old_dentry: dentry for file to link to 11812bad8471SEric Van Hensbergen * @dir: inode destination for new link 11822bad8471SEric Van Hensbergen * @new_dentry: dentry for link 11832bad8471SEric Van Hensbergen * 11842bad8471SEric Van Hensbergen */ 11852bad8471SEric Van Hensbergen 11862bad8471SEric Van Hensbergen /* XXX - lots of code dup'd from symlink and creates, 11872bad8471SEric Van Hensbergen * figure out a better reuse strategy 11882bad8471SEric Van Hensbergen */ 11892bad8471SEric Van Hensbergen 11902bad8471SEric Van Hensbergen static int 11912bad8471SEric Van Hensbergen v9fs_vfs_link(struct dentry *old_dentry, struct inode *dir, 11922bad8471SEric Van Hensbergen struct dentry *dentry) 11932bad8471SEric Van Hensbergen { 11942bad8471SEric Van Hensbergen int retval = -EPERM; 11952bad8471SEric Van Hensbergen struct v9fs_session_info *v9ses = v9fs_inode2v9ses(dir); 11962bad8471SEric Van Hensbergen struct v9fs_fcall *fcall = NULL; 11972bad8471SEric Van Hensbergen struct v9fs_stat *mistat = kmalloc(v9ses->maxdata, GFP_KERNEL); 11982bad8471SEric Van Hensbergen struct v9fs_fid *oldfid = v9fs_fid_lookup(old_dentry, FID_OP); 11992bad8471SEric Van Hensbergen struct v9fs_fid *newfid = NULL; 12002bad8471SEric Van Hensbergen char *symname = __getname(); 12012bad8471SEric Van Hensbergen 12022bad8471SEric Van Hensbergen dprintk(DEBUG_VFS, " %lu,%s,%s\n", dir->i_ino, dentry->d_name.name, 12032bad8471SEric Van Hensbergen old_dentry->d_name.name); 12042bad8471SEric Van Hensbergen 12052bad8471SEric Van Hensbergen if (!v9ses->extended) { 12062bad8471SEric Van Hensbergen dprintk(DEBUG_ERROR, "not extended\n"); 12072bad8471SEric Van Hensbergen goto FreeMem; 12082bad8471SEric Van Hensbergen } 12092bad8471SEric Van Hensbergen 12102bad8471SEric Van Hensbergen /* get fid of old_dentry */ 12112bad8471SEric Van Hensbergen sprintf(symname, "hardlink(%d)\n", oldfid->fid); 12122bad8471SEric Van Hensbergen 12132bad8471SEric Van Hensbergen /* issue a create */ 12142bad8471SEric Van Hensbergen retval = v9fs_create(dir, dentry, V9FS_DMLINK, 0); 12152bad8471SEric Van Hensbergen if (retval != 0) 12162bad8471SEric Van Hensbergen goto FreeMem; 12172bad8471SEric Van Hensbergen 12182bad8471SEric Van Hensbergen newfid = v9fs_fid_lookup(dentry, FID_OP); 12192bad8471SEric Van Hensbergen if (!newfid) { 12202bad8471SEric Van Hensbergen dprintk(DEBUG_ERROR, "couldn't resolve fid from dentry\n"); 12212bad8471SEric Van Hensbergen goto FreeMem; 12222bad8471SEric Van Hensbergen } 12232bad8471SEric Van Hensbergen 12242bad8471SEric Van Hensbergen /* issue a twstat */ 12252bad8471SEric Van Hensbergen v9fs_blank_mistat(v9ses, mistat); 12262bad8471SEric Van Hensbergen strcpy(mistat->data + 1, symname); 12272bad8471SEric Van Hensbergen mistat->extension = mistat->data + 1; 12282bad8471SEric Van Hensbergen retval = v9fs_t_wstat(v9ses, newfid->fid, mistat, &fcall); 12292bad8471SEric Van Hensbergen if (retval < 0) { 12302bad8471SEric Van Hensbergen dprintk(DEBUG_ERROR, "v9fs_t_wstat error: %s\n", 12312bad8471SEric Van Hensbergen FCALL_ERROR(fcall)); 12322bad8471SEric Van Hensbergen goto FreeMem; 12332bad8471SEric Van Hensbergen } 12342bad8471SEric Van Hensbergen 12352bad8471SEric Van Hensbergen kfree(fcall); 12362bad8471SEric Van Hensbergen 12372bad8471SEric Van Hensbergen if (v9fs_t_clunk(v9ses, newfid->fid, &fcall)) { 12382bad8471SEric Van Hensbergen dprintk(DEBUG_ERROR, "clunk for symlink failed: %s\n", 12392bad8471SEric Van Hensbergen FCALL_ERROR(fcall)); 12402bad8471SEric Van Hensbergen goto FreeMem; 12412bad8471SEric Van Hensbergen } 12422bad8471SEric Van Hensbergen 12432bad8471SEric Van Hensbergen d_drop(dentry); /* FID - will this also clunk? */ 12442bad8471SEric Van Hensbergen 12452bad8471SEric Van Hensbergen kfree(fcall); 12462bad8471SEric Van Hensbergen fcall = NULL; 12472bad8471SEric Van Hensbergen 12482bad8471SEric Van Hensbergen FreeMem: 12492bad8471SEric Van Hensbergen kfree(mistat); 12502bad8471SEric Van Hensbergen kfree(fcall); 12512bad8471SEric Van Hensbergen putname(symname); 12522bad8471SEric Van Hensbergen return retval; 12532bad8471SEric Van Hensbergen } 12542bad8471SEric Van Hensbergen 12552bad8471SEric Van Hensbergen /** 12562bad8471SEric Van Hensbergen * v9fs_vfs_mknod - create a special file 12572bad8471SEric Van Hensbergen * @dir: inode destination for new link 12582bad8471SEric Van Hensbergen * @dentry: dentry for file 12592bad8471SEric Van Hensbergen * @mode: mode for creation 12602bad8471SEric Van Hensbergen * @dev_t: device associated with special file 12612bad8471SEric Van Hensbergen * 12622bad8471SEric Van Hensbergen */ 12632bad8471SEric Van Hensbergen 12642bad8471SEric Van Hensbergen static int 12652bad8471SEric Van Hensbergen v9fs_vfs_mknod(struct inode *dir, struct dentry *dentry, int mode, dev_t rdev) 12662bad8471SEric Van Hensbergen { 12672bad8471SEric Van Hensbergen int retval = -EPERM; 12682bad8471SEric Van Hensbergen struct v9fs_fid *newfid; 12692bad8471SEric Van Hensbergen struct v9fs_session_info *v9ses = v9fs_inode2v9ses(dir); 12702bad8471SEric Van Hensbergen struct v9fs_fcall *fcall = NULL; 12712bad8471SEric Van Hensbergen struct v9fs_stat *mistat = kmalloc(v9ses->maxdata, GFP_KERNEL); 12722bad8471SEric Van Hensbergen char *symname = __getname(); 12732bad8471SEric Van Hensbergen 12742bad8471SEric Van Hensbergen dprintk(DEBUG_VFS, " %lu,%s mode: %x MAJOR: %u MINOR: %u\n", dir->i_ino, 12752bad8471SEric Van Hensbergen dentry->d_name.name, mode, MAJOR(rdev), MINOR(rdev)); 12762bad8471SEric Van Hensbergen 12772bad8471SEric Van Hensbergen if (!new_valid_dev(rdev)) { 12782bad8471SEric Van Hensbergen retval = -EINVAL; 12792bad8471SEric Van Hensbergen goto FreeMem; 12802bad8471SEric Van Hensbergen } 12812bad8471SEric Van Hensbergen 12822bad8471SEric Van Hensbergen if (!v9ses->extended) { 12832bad8471SEric Van Hensbergen dprintk(DEBUG_ERROR, "not extended\n"); 12842bad8471SEric Van Hensbergen goto FreeMem; 12852bad8471SEric Van Hensbergen } 12862bad8471SEric Van Hensbergen 12872bad8471SEric Van Hensbergen /* issue a create */ 12882bad8471SEric Van Hensbergen retval = v9fs_create(dir, dentry, mode, 0); 12892bad8471SEric Van Hensbergen 12902bad8471SEric Van Hensbergen if (retval != 0) 12912bad8471SEric Van Hensbergen goto FreeMem; 12922bad8471SEric Van Hensbergen 12932bad8471SEric Van Hensbergen newfid = v9fs_fid_lookup(dentry, FID_OP); 12942bad8471SEric Van Hensbergen if (!newfid) { 12952bad8471SEric Van Hensbergen dprintk(DEBUG_ERROR, "coudn't resove fid from dentry\n"); 12962bad8471SEric Van Hensbergen retval = -EINVAL; 12972bad8471SEric Van Hensbergen goto FreeMem; 12982bad8471SEric Van Hensbergen } 12992bad8471SEric Van Hensbergen 13002bad8471SEric Van Hensbergen /* build extension */ 13012bad8471SEric Van Hensbergen if (S_ISBLK(mode)) 13022bad8471SEric Van Hensbergen sprintf(symname, "b %u %u", MAJOR(rdev), MINOR(rdev)); 13032bad8471SEric Van Hensbergen else if (S_ISCHR(mode)) 13042bad8471SEric Van Hensbergen sprintf(symname, "c %u %u", MAJOR(rdev), MINOR(rdev)); 13052bad8471SEric Van Hensbergen else if (S_ISFIFO(mode)) ; /* DO NOTHING */ 13062bad8471SEric Van Hensbergen else { 13072bad8471SEric Van Hensbergen retval = -EINVAL; 13082bad8471SEric Van Hensbergen goto FreeMem; 13092bad8471SEric Van Hensbergen } 13102bad8471SEric Van Hensbergen 13112bad8471SEric Van Hensbergen if (!S_ISFIFO(mode)) { 13122bad8471SEric Van Hensbergen /* issue a twstat */ 13132bad8471SEric Van Hensbergen v9fs_blank_mistat(v9ses, mistat); 13142bad8471SEric Van Hensbergen strcpy(mistat->data + 1, symname); 13152bad8471SEric Van Hensbergen mistat->extension = mistat->data + 1; 13162bad8471SEric Van Hensbergen retval = v9fs_t_wstat(v9ses, newfid->fid, mistat, &fcall); 13172bad8471SEric Van Hensbergen if (retval < 0) { 13182bad8471SEric Van Hensbergen dprintk(DEBUG_ERROR, "v9fs_t_wstat error: %s\n", 13192bad8471SEric Van Hensbergen FCALL_ERROR(fcall)); 13202bad8471SEric Van Hensbergen goto FreeMem; 13212bad8471SEric Van Hensbergen } 13222bad8471SEric Van Hensbergen 13232bad8471SEric Van Hensbergen kfree(fcall); 13242bad8471SEric Van Hensbergen } 13252bad8471SEric Van Hensbergen 13262bad8471SEric Van Hensbergen /* need to update dcache so we show up */ 13272bad8471SEric Van Hensbergen kfree(fcall); 13282bad8471SEric Van Hensbergen 13292bad8471SEric Van Hensbergen if (v9fs_t_clunk(v9ses, newfid->fid, &fcall)) { 13302bad8471SEric Van Hensbergen dprintk(DEBUG_ERROR, "clunk for symlink failed: %s\n", 13312bad8471SEric Van Hensbergen FCALL_ERROR(fcall)); 13322bad8471SEric Van Hensbergen goto FreeMem; 13332bad8471SEric Van Hensbergen } 13342bad8471SEric Van Hensbergen 13352bad8471SEric Van Hensbergen d_drop(dentry); /* FID - will this also clunk? */ 13362bad8471SEric Van Hensbergen 13372bad8471SEric Van Hensbergen FreeMem: 13382bad8471SEric Van Hensbergen kfree(mistat); 13392bad8471SEric Van Hensbergen kfree(fcall); 13402bad8471SEric Van Hensbergen putname(symname); 13412bad8471SEric Van Hensbergen 13422bad8471SEric Van Hensbergen return retval; 13432bad8471SEric Van Hensbergen } 13442bad8471SEric Van Hensbergen 13452bad8471SEric Van Hensbergen static struct inode_operations v9fs_dir_inode_operations = { 13462bad8471SEric Van Hensbergen .create = v9fs_vfs_create, 13472bad8471SEric Van Hensbergen .lookup = v9fs_vfs_lookup, 13482bad8471SEric Van Hensbergen .symlink = v9fs_vfs_symlink, 13492bad8471SEric Van Hensbergen .link = v9fs_vfs_link, 13502bad8471SEric Van Hensbergen .unlink = v9fs_vfs_unlink, 13512bad8471SEric Van Hensbergen .mkdir = v9fs_vfs_mkdir, 13522bad8471SEric Van Hensbergen .rmdir = v9fs_vfs_rmdir, 13532bad8471SEric Van Hensbergen .mknod = v9fs_vfs_mknod, 13542bad8471SEric Van Hensbergen .rename = v9fs_vfs_rename, 13552bad8471SEric Van Hensbergen .readlink = v9fs_vfs_readlink, 13562bad8471SEric Van Hensbergen .getattr = v9fs_vfs_getattr, 13572bad8471SEric Van Hensbergen .setattr = v9fs_vfs_setattr, 13582bad8471SEric Van Hensbergen }; 13592bad8471SEric Van Hensbergen 13602bad8471SEric Van Hensbergen static struct inode_operations v9fs_file_inode_operations = { 13612bad8471SEric Van Hensbergen .getattr = v9fs_vfs_getattr, 13622bad8471SEric Van Hensbergen .setattr = v9fs_vfs_setattr, 13632bad8471SEric Van Hensbergen }; 13642bad8471SEric Van Hensbergen 13652bad8471SEric Van Hensbergen static struct inode_operations v9fs_symlink_inode_operations = { 13662bad8471SEric Van Hensbergen .readlink = v9fs_vfs_readlink, 13672bad8471SEric Van Hensbergen .follow_link = v9fs_vfs_follow_link, 13682bad8471SEric Van Hensbergen .put_link = v9fs_vfs_put_link, 13692bad8471SEric Van Hensbergen .getattr = v9fs_vfs_getattr, 13702bad8471SEric Van Hensbergen .setattr = v9fs_vfs_setattr, 13712bad8471SEric Van Hensbergen }; 1372