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 1282bad8471SEric Van Hensbergen /** 129531b1094SLatchesar Ionkov * v9fs_blank_wstat - helper function to setup a 9P stat structure 1302bad8471SEric Van Hensbergen * @v9ses: 9P session info (for determining extended mode) 131531b1094SLatchesar Ionkov * @wstat: structure to initialize 1322bad8471SEric Van Hensbergen * 1332bad8471SEric Van Hensbergen */ 1342bad8471SEric Van Hensbergen 13573c592b9SEric Van Hensbergen static void 136531b1094SLatchesar Ionkov v9fs_blank_wstat(struct v9fs_wstat *wstat) 1372bad8471SEric Van Hensbergen { 138531b1094SLatchesar Ionkov wstat->type = ~0; 139531b1094SLatchesar Ionkov wstat->dev = ~0; 140531b1094SLatchesar Ionkov wstat->qid.type = ~0; 141531b1094SLatchesar Ionkov wstat->qid.version = ~0; 142531b1094SLatchesar Ionkov *((long long *)&wstat->qid.path) = ~0; 143531b1094SLatchesar Ionkov wstat->mode = ~0; 144531b1094SLatchesar Ionkov wstat->atime = ~0; 145531b1094SLatchesar Ionkov wstat->mtime = ~0; 146531b1094SLatchesar Ionkov wstat->length = ~0; 147531b1094SLatchesar Ionkov wstat->name = NULL; 148531b1094SLatchesar Ionkov wstat->uid = NULL; 149531b1094SLatchesar Ionkov wstat->gid = NULL; 150531b1094SLatchesar Ionkov wstat->muid = NULL; 151531b1094SLatchesar Ionkov wstat->n_uid = ~0; 152531b1094SLatchesar Ionkov wstat->n_gid = ~0; 153531b1094SLatchesar Ionkov wstat->n_muid = ~0; 154531b1094SLatchesar Ionkov wstat->extension = NULL; 1552bad8471SEric Van Hensbergen } 1562bad8471SEric Van Hensbergen 1572bad8471SEric Van Hensbergen /** 1582bad8471SEric Van Hensbergen * v9fs_get_inode - helper function to setup an inode 1592bad8471SEric Van Hensbergen * @sb: superblock 1602bad8471SEric Van Hensbergen * @mode: mode to setup inode with 1612bad8471SEric Van Hensbergen * 1622bad8471SEric Van Hensbergen */ 1632bad8471SEric Van Hensbergen 1642bad8471SEric Van Hensbergen struct inode *v9fs_get_inode(struct super_block *sb, int mode) 1652bad8471SEric Van Hensbergen { 1662bad8471SEric Van Hensbergen struct inode *inode = NULL; 167b501611aSEric Van Hensbergen struct v9fs_session_info *v9ses = sb->s_fs_info; 1682bad8471SEric Van Hensbergen 1692bad8471SEric Van Hensbergen dprintk(DEBUG_VFS, "super block: %p mode: %o\n", sb, mode); 1702bad8471SEric Van Hensbergen 1712bad8471SEric Van Hensbergen inode = new_inode(sb); 1722bad8471SEric Van Hensbergen if (inode) { 1732bad8471SEric Van Hensbergen inode->i_mode = mode; 1742bad8471SEric Van Hensbergen inode->i_uid = current->fsuid; 1752bad8471SEric Van Hensbergen inode->i_gid = current->fsgid; 1762bad8471SEric Van Hensbergen inode->i_blksize = sb->s_blocksize; 1772bad8471SEric Van Hensbergen inode->i_blocks = 0; 1782bad8471SEric Van Hensbergen inode->i_rdev = 0; 1792bad8471SEric Van Hensbergen inode->i_atime = inode->i_mtime = inode->i_ctime = CURRENT_TIME; 1802bad8471SEric Van Hensbergen 1812bad8471SEric Van Hensbergen switch (mode & S_IFMT) { 1822bad8471SEric Van Hensbergen case S_IFIFO: 1832bad8471SEric Van Hensbergen case S_IFBLK: 1842bad8471SEric Van Hensbergen case S_IFCHR: 1852bad8471SEric Van Hensbergen case S_IFSOCK: 186b501611aSEric Van Hensbergen if(!v9ses->extended) { 187b501611aSEric Van Hensbergen dprintk(DEBUG_ERROR, "special files without extended mode\n"); 188b501611aSEric Van Hensbergen return ERR_PTR(-EINVAL); 189b501611aSEric Van Hensbergen } 1905d58bec5SEric Van Hensbergen init_special_inode(inode, inode->i_mode, 1915d58bec5SEric Van Hensbergen inode->i_rdev); 1925d58bec5SEric Van Hensbergen break; 1932bad8471SEric Van Hensbergen case S_IFREG: 1942bad8471SEric Van Hensbergen inode->i_op = &v9fs_file_inode_operations; 1952bad8471SEric Van Hensbergen inode->i_fop = &v9fs_file_operations; 1962bad8471SEric Van Hensbergen break; 197b501611aSEric Van Hensbergen case S_IFLNK: 198b501611aSEric Van Hensbergen if(!v9ses->extended) { 199b501611aSEric Van Hensbergen dprintk(DEBUG_ERROR, "extended modes used w/o 9P2000.u\n"); 200b501611aSEric Van Hensbergen return ERR_PTR(-EINVAL); 201b501611aSEric Van Hensbergen } 202b501611aSEric Van Hensbergen inode->i_op = &v9fs_symlink_inode_operations; 203b501611aSEric Van Hensbergen break; 2042bad8471SEric Van Hensbergen case S_IFDIR: 2052bad8471SEric Van Hensbergen inode->i_nlink++; 206b501611aSEric Van Hensbergen if(v9ses->extended) 207b501611aSEric Van Hensbergen inode->i_op = &v9fs_dir_inode_operations_ext; 208b501611aSEric Van Hensbergen else 2092bad8471SEric Van Hensbergen inode->i_op = &v9fs_dir_inode_operations; 2102bad8471SEric Van Hensbergen inode->i_fop = &v9fs_dir_operations; 2112bad8471SEric Van Hensbergen break; 2122bad8471SEric Van Hensbergen default: 2132bad8471SEric Van Hensbergen dprintk(DEBUG_ERROR, "BAD mode 0x%x S_IFMT 0x%x\n", 2142bad8471SEric Van Hensbergen mode, mode & S_IFMT); 2152bad8471SEric Van Hensbergen return ERR_PTR(-EINVAL); 2162bad8471SEric Van Hensbergen } 2172bad8471SEric Van Hensbergen } else { 2182bad8471SEric Van Hensbergen eprintk(KERN_WARNING, "Problem allocating inode\n"); 2192bad8471SEric Van Hensbergen return ERR_PTR(-ENOMEM); 2202bad8471SEric Van Hensbergen } 2212bad8471SEric Van Hensbergen return inode; 2222bad8471SEric Van Hensbergen } 2232bad8471SEric Van Hensbergen 2242bad8471SEric Van Hensbergen /** 2252bad8471SEric Van Hensbergen * v9fs_create - helper function to create files and directories 2262bad8471SEric Van Hensbergen * @dir: directory inode file is being created in 2272bad8471SEric Van Hensbergen * @file_dentry: dentry file is being created in 2282bad8471SEric Van Hensbergen * @perm: permissions file is being created with 22973c592b9SEric Van Hensbergen * @open_mode: resulting open mode for file 2302bad8471SEric Van Hensbergen * 2312bad8471SEric Van Hensbergen */ 2322bad8471SEric Van Hensbergen 2332bad8471SEric Van Hensbergen static int 2342bad8471SEric Van Hensbergen v9fs_create(struct inode *dir, 2352bad8471SEric Van Hensbergen struct dentry *file_dentry, 2362bad8471SEric Van Hensbergen unsigned int perm, unsigned int open_mode) 2372bad8471SEric Van Hensbergen { 2382bad8471SEric Van Hensbergen struct v9fs_session_info *v9ses = v9fs_inode2v9ses(dir); 2392bad8471SEric Van Hensbergen struct super_block *sb = dir->i_sb; 2402bad8471SEric Van Hensbergen struct v9fs_fid *dirfid = 2410b8dd177SLatchesar Ionkov v9fs_fid_lookup(file_dentry->d_parent); 2422bad8471SEric Van Hensbergen struct v9fs_fid *fid = NULL; 2432bad8471SEric Van Hensbergen struct inode *file_inode = NULL; 2442bad8471SEric Van Hensbergen struct v9fs_fcall *fcall = NULL; 2452bad8471SEric Van Hensbergen struct v9fs_qid qid; 2462bad8471SEric Van Hensbergen int dirfidnum = -1; 2472bad8471SEric Van Hensbergen long newfid = -1; 2482bad8471SEric Van Hensbergen int result = 0; 2492bad8471SEric Van Hensbergen unsigned int iounit = 0; 2500b8dd177SLatchesar Ionkov int wfidno = -1; 2513cf6429aSLatchesar Ionkov int err; 2522bad8471SEric Van Hensbergen 2532bad8471SEric Van Hensbergen perm = unixmode2p9mode(v9ses, perm); 2542bad8471SEric Van Hensbergen 2552bad8471SEric Van Hensbergen dprintk(DEBUG_VFS, "dir: %p dentry: %p perm: %o mode: %o\n", dir, 2562bad8471SEric Van Hensbergen file_dentry, perm, open_mode); 2572bad8471SEric Van Hensbergen 2582bad8471SEric Van Hensbergen if (!dirfid) 2592bad8471SEric Van Hensbergen return -EBADF; 2602bad8471SEric Van Hensbergen 2612bad8471SEric Van Hensbergen dirfidnum = dirfid->fid; 2622bad8471SEric Van Hensbergen if (dirfidnum < 0) { 2632bad8471SEric Van Hensbergen dprintk(DEBUG_ERROR, "No fid for the directory #%lu\n", 2642bad8471SEric Van Hensbergen dir->i_ino); 2652bad8471SEric Van Hensbergen return -EBADF; 2662bad8471SEric Van Hensbergen } 2672bad8471SEric Van Hensbergen 2682bad8471SEric Van Hensbergen if (file_dentry->d_inode) { 2692bad8471SEric Van Hensbergen dprintk(DEBUG_ERROR, 2702bad8471SEric Van Hensbergen "Odd. There is an inode for dir %lu, name :%s:\n", 2712bad8471SEric Van Hensbergen dir->i_ino, file_dentry->d_name.name); 2722bad8471SEric Van Hensbergen return -EEXIST; 2732bad8471SEric Van Hensbergen } 2742bad8471SEric Van Hensbergen 2752bad8471SEric Van Hensbergen newfid = v9fs_get_idpool(&v9ses->fidpool); 2762bad8471SEric Van Hensbergen if (newfid < 0) { 2772bad8471SEric Van Hensbergen eprintk(KERN_WARNING, "no free fids available\n"); 2782bad8471SEric Van Hensbergen return -ENOSPC; 2792bad8471SEric Van Hensbergen } 2802bad8471SEric Van Hensbergen 2812bad8471SEric Van Hensbergen result = v9fs_t_walk(v9ses, dirfidnum, newfid, NULL, &fcall); 2822bad8471SEric Van Hensbergen if (result < 0) { 283531b1094SLatchesar Ionkov PRINT_FCALL_ERROR("clone error", fcall); 2842bad8471SEric Van Hensbergen v9fs_put_idpool(newfid, &v9ses->fidpool); 2850b8dd177SLatchesar Ionkov newfid = -1; 2862bad8471SEric Van Hensbergen goto CleanUpFid; 2872bad8471SEric Van Hensbergen } 2882bad8471SEric Van Hensbergen 2892bad8471SEric Van Hensbergen kfree(fcall); 2903cf6429aSLatchesar Ionkov fcall = NULL; 2912bad8471SEric Van Hensbergen 2922bad8471SEric Van Hensbergen result = v9fs_t_create(v9ses, newfid, (char *)file_dentry->d_name.name, 2932bad8471SEric Van Hensbergen perm, open_mode, &fcall); 2942bad8471SEric Van Hensbergen if (result < 0) { 295531b1094SLatchesar Ionkov PRINT_FCALL_ERROR("create fails", fcall); 2962bad8471SEric Van Hensbergen goto CleanUpFid; 2972bad8471SEric Van Hensbergen } 2982bad8471SEric Van Hensbergen 2992bad8471SEric Van Hensbergen iounit = fcall->params.rcreate.iounit; 3002bad8471SEric Van Hensbergen qid = fcall->params.rcreate.qid; 3012bad8471SEric Van Hensbergen kfree(fcall); 3023cf6429aSLatchesar Ionkov fcall = NULL; 3032bad8471SEric Van Hensbergen 3043cf6429aSLatchesar Ionkov if (!(perm&V9FS_DMDIR)) { 3050b8dd177SLatchesar Ionkov fid = v9fs_fid_create(file_dentry, v9ses, newfid, 1); 3060b8dd177SLatchesar Ionkov dprintk(DEBUG_VFS, "fid %p %d\n", fid, fid->fidcreate); 3072bad8471SEric Van Hensbergen if (!fid) { 3082bad8471SEric Van Hensbergen result = -ENOMEM; 3092bad8471SEric Van Hensbergen goto CleanUpFid; 3102bad8471SEric Van Hensbergen } 3112bad8471SEric Van Hensbergen 3122bad8471SEric Van Hensbergen fid->qid = qid; 3132bad8471SEric Van Hensbergen fid->iounit = iounit; 3143cf6429aSLatchesar Ionkov } else { 3153cf6429aSLatchesar Ionkov err = v9fs_t_clunk(v9ses, newfid); 316d8da097aSLatchesar Ionkov newfid = -1; 3173cf6429aSLatchesar Ionkov if (err < 0) 3183cf6429aSLatchesar Ionkov dprintk(DEBUG_ERROR, "clunk for mkdir failed: %d\n", err); 3193cf6429aSLatchesar Ionkov } 3200b8dd177SLatchesar Ionkov 3210b8dd177SLatchesar Ionkov /* walk to the newly created file and put the fid in the dentry */ 3220b8dd177SLatchesar Ionkov wfidno = v9fs_get_idpool(&v9ses->fidpool); 323d8da097aSLatchesar Ionkov if (wfidno < 0) { 3240b8dd177SLatchesar Ionkov eprintk(KERN_WARNING, "no free fids available\n"); 3250b8dd177SLatchesar Ionkov return -ENOSPC; 3260b8dd177SLatchesar Ionkov } 3270b8dd177SLatchesar Ionkov 3280b8dd177SLatchesar Ionkov result = v9fs_t_walk(v9ses, dirfidnum, wfidno, 3293cf6429aSLatchesar Ionkov (char *) file_dentry->d_name.name, &fcall); 3300b8dd177SLatchesar Ionkov if (result < 0) { 331531b1094SLatchesar Ionkov PRINT_FCALL_ERROR("clone error", fcall); 3320b8dd177SLatchesar Ionkov v9fs_put_idpool(wfidno, &v9ses->fidpool); 3330b8dd177SLatchesar Ionkov wfidno = -1; 3340b8dd177SLatchesar Ionkov goto CleanUpFid; 3350b8dd177SLatchesar Ionkov } 3363cf6429aSLatchesar Ionkov kfree(fcall); 3373cf6429aSLatchesar Ionkov fcall = NULL; 3380b8dd177SLatchesar Ionkov 3390b8dd177SLatchesar Ionkov if (!v9fs_fid_create(file_dentry, v9ses, wfidno, 0)) { 3400b8dd177SLatchesar Ionkov v9fs_put_idpool(wfidno, &v9ses->fidpool); 3410b8dd177SLatchesar Ionkov 3420b8dd177SLatchesar Ionkov goto CleanUpFid; 3430b8dd177SLatchesar Ionkov } 3442bad8471SEric Van Hensbergen 3452bad8471SEric Van Hensbergen if ((perm & V9FS_DMSYMLINK) || (perm & V9FS_DMLINK) || 3462bad8471SEric Van Hensbergen (perm & V9FS_DMNAMEDPIPE) || (perm & V9FS_DMSOCKET) || 3472bad8471SEric Van Hensbergen (perm & V9FS_DMDEVICE)) 3482bad8471SEric Van Hensbergen return 0; 3492bad8471SEric Van Hensbergen 350d8da097aSLatchesar Ionkov result = v9fs_t_stat(v9ses, wfidno, &fcall); 3512bad8471SEric Van Hensbergen if (result < 0) { 352531b1094SLatchesar Ionkov PRINT_FCALL_ERROR("stat error", fcall); 3532bad8471SEric Van Hensbergen goto CleanUpFid; 3542bad8471SEric Van Hensbergen } 3552bad8471SEric Van Hensbergen 3562bad8471SEric Van Hensbergen 357531b1094SLatchesar Ionkov file_inode = v9fs_get_inode(sb, 358531b1094SLatchesar Ionkov p9mode2unixmode(v9ses, fcall->params.rstat.stat.mode)); 359531b1094SLatchesar Ionkov 3602bad8471SEric Van Hensbergen if ((!file_inode) || IS_ERR(file_inode)) { 3612bad8471SEric Van Hensbergen dprintk(DEBUG_ERROR, "create inode failed\n"); 3622bad8471SEric Van Hensbergen result = -EBADF; 3632bad8471SEric Van Hensbergen goto CleanUpFid; 3642bad8471SEric Van Hensbergen } 3652bad8471SEric Van Hensbergen 366531b1094SLatchesar Ionkov v9fs_stat2inode(&fcall->params.rstat.stat, file_inode, sb); 3672bad8471SEric Van Hensbergen kfree(fcall); 368a93a117eSLatchesar Ionkov fcall = NULL; 369a93a117eSLatchesar Ionkov file_dentry->d_op = &v9fs_dentry_operations; 3702bad8471SEric Van Hensbergen d_instantiate(file_dentry, file_inode); 3712bad8471SEric Van Hensbergen 3722bad8471SEric Van Hensbergen return 0; 3732bad8471SEric Van Hensbergen 3742bad8471SEric Van Hensbergen CleanUpFid: 3752bad8471SEric Van Hensbergen kfree(fcall); 3763cf6429aSLatchesar Ionkov fcall = NULL; 3772bad8471SEric Van Hensbergen 3780b8dd177SLatchesar Ionkov if (newfid >= 0) { 3793cf6429aSLatchesar Ionkov err = v9fs_t_clunk(v9ses, newfid); 3803cf6429aSLatchesar Ionkov if (err < 0) 3813cf6429aSLatchesar Ionkov dprintk(DEBUG_ERROR, "clunk failed: %d\n", err); 3820b8dd177SLatchesar Ionkov } 3830b8dd177SLatchesar Ionkov if (wfidno >= 0) { 3843cf6429aSLatchesar Ionkov err = v9fs_t_clunk(v9ses, wfidno); 3853cf6429aSLatchesar Ionkov if (err < 0) 3863cf6429aSLatchesar Ionkov dprintk(DEBUG_ERROR, "clunk failed: %d\n", err); 3872bad8471SEric Van Hensbergen } 3882bad8471SEric Van Hensbergen return result; 3892bad8471SEric Van Hensbergen } 3902bad8471SEric Van Hensbergen 3912bad8471SEric Van Hensbergen /** 3922bad8471SEric Van Hensbergen * v9fs_remove - helper function to remove files and directories 39373c592b9SEric Van Hensbergen * @dir: directory inode that is being deleted 39473c592b9SEric Van Hensbergen * @file: dentry that is being deleted 39573c592b9SEric Van Hensbergen * @rmdir: removing a directory 3962bad8471SEric Van Hensbergen * 3972bad8471SEric Van Hensbergen */ 3982bad8471SEric Van Hensbergen 3992bad8471SEric Van Hensbergen static int v9fs_remove(struct inode *dir, struct dentry *file, int rmdir) 4002bad8471SEric Van Hensbergen { 4012bad8471SEric Van Hensbergen struct v9fs_fcall *fcall = NULL; 4022bad8471SEric Van Hensbergen struct super_block *sb = NULL; 4032bad8471SEric Van Hensbergen struct v9fs_session_info *v9ses = NULL; 4042bad8471SEric Van Hensbergen struct v9fs_fid *v9fid = NULL; 4052bad8471SEric Van Hensbergen struct inode *file_inode = NULL; 4062bad8471SEric Van Hensbergen int fid = -1; 4072bad8471SEric Van Hensbergen int result = 0; 4082bad8471SEric Van Hensbergen 4092bad8471SEric Van Hensbergen dprintk(DEBUG_VFS, "inode: %p dentry: %p rmdir: %d\n", dir, file, 4102bad8471SEric Van Hensbergen rmdir); 4112bad8471SEric Van Hensbergen 4122bad8471SEric Van Hensbergen file_inode = file->d_inode; 4132bad8471SEric Van Hensbergen sb = file_inode->i_sb; 4142bad8471SEric Van Hensbergen v9ses = v9fs_inode2v9ses(file_inode); 4150b8dd177SLatchesar Ionkov v9fid = v9fs_fid_lookup(file); 4162bad8471SEric Van Hensbergen 4172bad8471SEric Van Hensbergen if (!v9fid) { 4182bad8471SEric Van Hensbergen dprintk(DEBUG_ERROR, 4192bad8471SEric Van Hensbergen "no v9fs_fid\n"); 4202bad8471SEric Van Hensbergen return -EBADF; 4212bad8471SEric Van Hensbergen } 4222bad8471SEric Van Hensbergen 4232bad8471SEric Van Hensbergen fid = v9fid->fid; 4242bad8471SEric Van Hensbergen if (fid < 0) { 4252bad8471SEric Van Hensbergen dprintk(DEBUG_ERROR, "inode #%lu, no fid!\n", 4262bad8471SEric Van Hensbergen file_inode->i_ino); 4272bad8471SEric Van Hensbergen return -EBADF; 4282bad8471SEric Van Hensbergen } 4292bad8471SEric Van Hensbergen 4302bad8471SEric Van Hensbergen result = v9fs_t_remove(v9ses, fid, &fcall); 431531b1094SLatchesar Ionkov if (result < 0) { 432531b1094SLatchesar Ionkov PRINT_FCALL_ERROR("remove fails", fcall); 433531b1094SLatchesar Ionkov } else { 4342bad8471SEric Van Hensbergen v9fs_put_idpool(fid, &v9ses->fidpool); 4352bad8471SEric Van Hensbergen v9fs_fid_destroy(v9fid); 4362bad8471SEric Van Hensbergen } 4372bad8471SEric Van Hensbergen 4382bad8471SEric Van Hensbergen kfree(fcall); 4392bad8471SEric Van Hensbergen return result; 4402bad8471SEric Van Hensbergen } 4412bad8471SEric Van Hensbergen 4422bad8471SEric Van Hensbergen /** 4432bad8471SEric Van Hensbergen * v9fs_vfs_create - VFS hook to create files 4442bad8471SEric Van Hensbergen * @inode: directory inode that is being deleted 4452bad8471SEric Van Hensbergen * @dentry: dentry that is being deleted 4462bad8471SEric Van Hensbergen * @perm: create permissions 4472bad8471SEric Van Hensbergen * @nd: path information 4482bad8471SEric Van Hensbergen * 4492bad8471SEric Van Hensbergen */ 4502bad8471SEric Van Hensbergen 4512bad8471SEric Van Hensbergen static int 4522bad8471SEric Van Hensbergen v9fs_vfs_create(struct inode *inode, struct dentry *dentry, int perm, 4532bad8471SEric Van Hensbergen struct nameidata *nd) 4542bad8471SEric Van Hensbergen { 4552bad8471SEric Van Hensbergen return v9fs_create(inode, dentry, perm, O_RDWR); 4562bad8471SEric Van Hensbergen } 4572bad8471SEric Van Hensbergen 4582bad8471SEric Van Hensbergen /** 4592bad8471SEric Van Hensbergen * v9fs_vfs_mkdir - VFS mkdir hook to create a directory 46073c592b9SEric Van Hensbergen * @inode: inode that is being unlinked 4612bad8471SEric Van Hensbergen * @dentry: dentry that is being unlinked 4622bad8471SEric Van Hensbergen * @mode: mode for new directory 4632bad8471SEric Van Hensbergen * 4642bad8471SEric Van Hensbergen */ 4652bad8471SEric Van Hensbergen 4662bad8471SEric Van Hensbergen static int v9fs_vfs_mkdir(struct inode *inode, struct dentry *dentry, int mode) 4672bad8471SEric Van Hensbergen { 4682bad8471SEric Van Hensbergen return v9fs_create(inode, dentry, mode | S_IFDIR, O_RDONLY); 4692bad8471SEric Van Hensbergen } 4702bad8471SEric Van Hensbergen 4712bad8471SEric Van Hensbergen /** 4722bad8471SEric Van Hensbergen * v9fs_vfs_lookup - VFS lookup hook to "walk" to a new inode 4732bad8471SEric Van Hensbergen * @dir: inode that is being walked from 4742bad8471SEric Van Hensbergen * @dentry: dentry that is being walked to? 4752bad8471SEric Van Hensbergen * @nameidata: path data 4762bad8471SEric Van Hensbergen * 4772bad8471SEric Van Hensbergen */ 4782bad8471SEric Van Hensbergen 4792bad8471SEric Van Hensbergen static struct dentry *v9fs_vfs_lookup(struct inode *dir, struct dentry *dentry, 4802bad8471SEric Van Hensbergen struct nameidata *nameidata) 4812bad8471SEric Van Hensbergen { 4822bad8471SEric Van Hensbergen struct super_block *sb; 4832bad8471SEric Van Hensbergen struct v9fs_session_info *v9ses; 4842bad8471SEric Van Hensbergen struct v9fs_fid *dirfid; 4852bad8471SEric Van Hensbergen struct v9fs_fid *fid; 4862bad8471SEric Van Hensbergen struct inode *inode; 4872bad8471SEric Van Hensbergen struct v9fs_fcall *fcall = NULL; 4882bad8471SEric Van Hensbergen int dirfidnum = -1; 4892bad8471SEric Van Hensbergen int newfid = -1; 4902bad8471SEric Van Hensbergen int result = 0; 4912bad8471SEric Van Hensbergen 4922bad8471SEric Van Hensbergen dprintk(DEBUG_VFS, "dir: %p dentry: (%s) %p nameidata: %p\n", 4932bad8471SEric Van Hensbergen dir, dentry->d_iname, dentry, nameidata); 4942bad8471SEric Van Hensbergen 4952bad8471SEric Van Hensbergen sb = dir->i_sb; 4962bad8471SEric Van Hensbergen v9ses = v9fs_inode2v9ses(dir); 4970b8dd177SLatchesar Ionkov dirfid = v9fs_fid_lookup(dentry->d_parent); 4982bad8471SEric Van Hensbergen 4992bad8471SEric Van Hensbergen if (!dirfid) { 5002bad8471SEric Van Hensbergen dprintk(DEBUG_ERROR, "no dirfid\n"); 5012bad8471SEric Van Hensbergen return ERR_PTR(-EINVAL); 5022bad8471SEric Van Hensbergen } 5032bad8471SEric Van Hensbergen 5042bad8471SEric Van Hensbergen dirfidnum = dirfid->fid; 5052bad8471SEric Van Hensbergen 5062bad8471SEric Van Hensbergen if (dirfidnum < 0) { 5072bad8471SEric Van Hensbergen dprintk(DEBUG_ERROR, "no dirfid for inode %p, #%lu\n", 5082bad8471SEric Van Hensbergen dir, dir->i_ino); 5092bad8471SEric Van Hensbergen return ERR_PTR(-EBADF); 5102bad8471SEric Van Hensbergen } 5112bad8471SEric Van Hensbergen 5122bad8471SEric Van Hensbergen newfid = v9fs_get_idpool(&v9ses->fidpool); 5132bad8471SEric Van Hensbergen if (newfid < 0) { 5142bad8471SEric Van Hensbergen eprintk(KERN_WARNING, "newfid fails!\n"); 5152bad8471SEric Van Hensbergen return ERR_PTR(-ENOSPC); 5162bad8471SEric Van Hensbergen } 5172bad8471SEric Van Hensbergen 5182bad8471SEric Van Hensbergen result = 5192bad8471SEric Van Hensbergen v9fs_t_walk(v9ses, dirfidnum, newfid, (char *)dentry->d_name.name, 5202bad8471SEric Van Hensbergen NULL); 5212bad8471SEric Van Hensbergen if (result < 0) { 5222bad8471SEric Van Hensbergen v9fs_put_idpool(newfid, &v9ses->fidpool); 5232bad8471SEric Van Hensbergen if (result == -ENOENT) { 5242bad8471SEric Van Hensbergen d_add(dentry, NULL); 5250b8dd177SLatchesar Ionkov dprintk(DEBUG_VFS, 5262bad8471SEric Van Hensbergen "Return negative dentry %p count %d\n", 5272bad8471SEric Van Hensbergen dentry, atomic_read(&dentry->d_count)); 5282bad8471SEric Van Hensbergen return NULL; 5292bad8471SEric Van Hensbergen } 5302bad8471SEric Van Hensbergen dprintk(DEBUG_ERROR, "walk error:%d\n", result); 5312bad8471SEric Van Hensbergen goto FreeFcall; 5322bad8471SEric Van Hensbergen } 5332bad8471SEric Van Hensbergen 5342bad8471SEric Van Hensbergen result = v9fs_t_stat(v9ses, newfid, &fcall); 5352bad8471SEric Van Hensbergen if (result < 0) { 5362bad8471SEric Van Hensbergen dprintk(DEBUG_ERROR, "stat error\n"); 5372bad8471SEric Van Hensbergen goto FreeFcall; 5382bad8471SEric Van Hensbergen } 5392bad8471SEric Van Hensbergen 540531b1094SLatchesar Ionkov inode = v9fs_get_inode(sb, p9mode2unixmode(v9ses, 541531b1094SLatchesar Ionkov fcall->params.rstat.stat.mode)); 5422bad8471SEric Van Hensbergen 5432bad8471SEric Van Hensbergen if (IS_ERR(inode) && (PTR_ERR(inode) == -ENOSPC)) { 5442bad8471SEric Van Hensbergen eprintk(KERN_WARNING, "inode alloc failes, returns %ld\n", 5452bad8471SEric Van Hensbergen PTR_ERR(inode)); 5462bad8471SEric Van Hensbergen 5472bad8471SEric Van Hensbergen result = -ENOSPC; 5482bad8471SEric Van Hensbergen goto FreeFcall; 5492bad8471SEric Van Hensbergen } 5502bad8471SEric Van Hensbergen 551531b1094SLatchesar Ionkov inode->i_ino = v9fs_qid2ino(&fcall->params.rstat.stat.qid); 5522bad8471SEric Van Hensbergen 5530b8dd177SLatchesar Ionkov fid = v9fs_fid_create(dentry, v9ses, newfid, 0); 5542bad8471SEric Van Hensbergen if (fid == NULL) { 5552bad8471SEric Van Hensbergen dprintk(DEBUG_ERROR, "couldn't insert\n"); 5562bad8471SEric Van Hensbergen result = -ENOMEM; 5572bad8471SEric Van Hensbergen goto FreeFcall; 5582bad8471SEric Van Hensbergen } 5592bad8471SEric Van Hensbergen 560531b1094SLatchesar Ionkov fid->qid = fcall->params.rstat.stat.qid; 5612bad8471SEric Van Hensbergen 5622bad8471SEric Van Hensbergen dentry->d_op = &v9fs_dentry_operations; 563531b1094SLatchesar Ionkov v9fs_stat2inode(&fcall->params.rstat.stat, inode, inode->i_sb); 5642bad8471SEric Van Hensbergen 5652bad8471SEric Van Hensbergen d_add(dentry, inode); 5662bad8471SEric Van Hensbergen kfree(fcall); 5672bad8471SEric Van Hensbergen 5682bad8471SEric Van Hensbergen return NULL; 5692bad8471SEric Van Hensbergen 5702bad8471SEric Van Hensbergen FreeFcall: 5712bad8471SEric Van Hensbergen kfree(fcall); 5722bad8471SEric Van Hensbergen return ERR_PTR(result); 5732bad8471SEric Van Hensbergen } 5742bad8471SEric Van Hensbergen 5752bad8471SEric Van Hensbergen /** 5762bad8471SEric Van Hensbergen * v9fs_vfs_unlink - VFS unlink hook to delete an inode 5772bad8471SEric Van Hensbergen * @i: inode that is being unlinked 57873c592b9SEric Van Hensbergen * @d: dentry that is being unlinked 5792bad8471SEric Van Hensbergen * 5802bad8471SEric Van Hensbergen */ 5812bad8471SEric Van Hensbergen 5822bad8471SEric Van Hensbergen static int v9fs_vfs_unlink(struct inode *i, struct dentry *d) 5832bad8471SEric Van Hensbergen { 5842bad8471SEric Van Hensbergen return v9fs_remove(i, d, 0); 5852bad8471SEric Van Hensbergen } 5862bad8471SEric Van Hensbergen 5872bad8471SEric Van Hensbergen /** 5882bad8471SEric Van Hensbergen * v9fs_vfs_rmdir - VFS unlink hook to delete a directory 5892bad8471SEric Van Hensbergen * @i: inode that is being unlinked 59073c592b9SEric Van Hensbergen * @d: dentry that is being unlinked 5912bad8471SEric Van Hensbergen * 5922bad8471SEric Van Hensbergen */ 5932bad8471SEric Van Hensbergen 5942bad8471SEric Van Hensbergen static int v9fs_vfs_rmdir(struct inode *i, struct dentry *d) 5952bad8471SEric Van Hensbergen { 5962bad8471SEric Van Hensbergen return v9fs_remove(i, d, 1); 5972bad8471SEric Van Hensbergen } 5982bad8471SEric Van Hensbergen 5992bad8471SEric Van Hensbergen /** 6002bad8471SEric Van Hensbergen * v9fs_vfs_rename - VFS hook to rename an inode 6012bad8471SEric Van Hensbergen * @old_dir: old dir inode 6022bad8471SEric Van Hensbergen * @old_dentry: old dentry 6032bad8471SEric Van Hensbergen * @new_dir: new dir inode 6042bad8471SEric Van Hensbergen * @new_dentry: new dentry 6052bad8471SEric Van Hensbergen * 6062bad8471SEric Van Hensbergen */ 6072bad8471SEric Van Hensbergen 6082bad8471SEric Van Hensbergen static int 6092bad8471SEric Van Hensbergen v9fs_vfs_rename(struct inode *old_dir, struct dentry *old_dentry, 6102bad8471SEric Van Hensbergen struct inode *new_dir, struct dentry *new_dentry) 6112bad8471SEric Van Hensbergen { 6122bad8471SEric Van Hensbergen struct inode *old_inode = old_dentry->d_inode; 6132bad8471SEric Van Hensbergen struct v9fs_session_info *v9ses = v9fs_inode2v9ses(old_inode); 6140b8dd177SLatchesar Ionkov struct v9fs_fid *oldfid = v9fs_fid_lookup(old_dentry); 6152bad8471SEric Van Hensbergen struct v9fs_fid *olddirfid = 6160b8dd177SLatchesar Ionkov v9fs_fid_lookup(old_dentry->d_parent); 6172bad8471SEric Van Hensbergen struct v9fs_fid *newdirfid = 6180b8dd177SLatchesar Ionkov v9fs_fid_lookup(new_dentry->d_parent); 619531b1094SLatchesar Ionkov struct v9fs_wstat wstat; 6202bad8471SEric Van Hensbergen struct v9fs_fcall *fcall = NULL; 6212bad8471SEric Van Hensbergen int fid = -1; 6222bad8471SEric Van Hensbergen int olddirfidnum = -1; 6232bad8471SEric Van Hensbergen int newdirfidnum = -1; 6242bad8471SEric Van Hensbergen int retval = 0; 6252bad8471SEric Van Hensbergen 6262bad8471SEric Van Hensbergen dprintk(DEBUG_VFS, "\n"); 6272bad8471SEric Van Hensbergen 6282bad8471SEric Van Hensbergen if ((!oldfid) || (!olddirfid) || (!newdirfid)) { 6292bad8471SEric Van Hensbergen dprintk(DEBUG_ERROR, "problem with arguments\n"); 6302bad8471SEric Van Hensbergen return -EBADF; 6312bad8471SEric Van Hensbergen } 6322bad8471SEric Van Hensbergen 6332bad8471SEric Van Hensbergen /* 9P can only handle file rename in the same directory */ 6342bad8471SEric Van Hensbergen if (memcmp(&olddirfid->qid, &newdirfid->qid, sizeof(newdirfid->qid))) { 6352bad8471SEric Van Hensbergen dprintk(DEBUG_ERROR, "old dir and new dir are different\n"); 6362bad8471SEric Van Hensbergen retval = -EPERM; 6372bad8471SEric Van Hensbergen goto FreeFcallnBail; 6382bad8471SEric Van Hensbergen } 6392bad8471SEric Van Hensbergen 6402bad8471SEric Van Hensbergen fid = oldfid->fid; 6412bad8471SEric Van Hensbergen olddirfidnum = olddirfid->fid; 6422bad8471SEric Van Hensbergen newdirfidnum = newdirfid->fid; 6432bad8471SEric Van Hensbergen 6442bad8471SEric Van Hensbergen if (fid < 0) { 6452bad8471SEric Van Hensbergen dprintk(DEBUG_ERROR, "no fid for old file #%lu\n", 6462bad8471SEric Van Hensbergen old_inode->i_ino); 6472bad8471SEric Van Hensbergen retval = -EBADF; 6482bad8471SEric Van Hensbergen goto FreeFcallnBail; 6492bad8471SEric Van Hensbergen } 6502bad8471SEric Van Hensbergen 651531b1094SLatchesar Ionkov v9fs_blank_wstat(&wstat); 652531b1094SLatchesar Ionkov wstat.muid = v9ses->name; 653531b1094SLatchesar Ionkov wstat.name = (char *) new_dentry->d_name.name; 6542bad8471SEric Van Hensbergen 655531b1094SLatchesar Ionkov retval = v9fs_t_wstat(v9ses, fid, &wstat, &fcall); 6562bad8471SEric Van Hensbergen 6572bad8471SEric Van Hensbergen FreeFcallnBail: 6582bad8471SEric Van Hensbergen if (retval < 0) 659531b1094SLatchesar Ionkov PRINT_FCALL_ERROR("wstat error", fcall); 6602bad8471SEric Van Hensbergen 6612bad8471SEric Van Hensbergen kfree(fcall); 6622bad8471SEric Van Hensbergen return retval; 6632bad8471SEric Van Hensbergen } 6642bad8471SEric Van Hensbergen 6652bad8471SEric Van Hensbergen /** 666943ffb58SAdrian Bunk * v9fs_vfs_getattr - retrieve file metadata 6672bad8471SEric Van Hensbergen * @mnt - mount information 6682bad8471SEric Van Hensbergen * @dentry - file to get attributes on 6692bad8471SEric Van Hensbergen * @stat - metadata structure to populate 6702bad8471SEric Van Hensbergen * 6712bad8471SEric Van Hensbergen */ 6722bad8471SEric Van Hensbergen 6732bad8471SEric Van Hensbergen static int 6742bad8471SEric Van Hensbergen v9fs_vfs_getattr(struct vfsmount *mnt, struct dentry *dentry, 6752bad8471SEric Van Hensbergen struct kstat *stat) 6762bad8471SEric Van Hensbergen { 6772bad8471SEric Van Hensbergen struct v9fs_fcall *fcall = NULL; 6782bad8471SEric Van Hensbergen struct v9fs_session_info *v9ses = v9fs_inode2v9ses(dentry->d_inode); 6790b8dd177SLatchesar Ionkov struct v9fs_fid *fid = v9fs_fid_lookup(dentry); 6802bad8471SEric Van Hensbergen int err = -EPERM; 6812bad8471SEric Van Hensbergen 6822bad8471SEric Van Hensbergen dprintk(DEBUG_VFS, "dentry: %p\n", dentry); 6832bad8471SEric Van Hensbergen if (!fid) { 6842bad8471SEric Van Hensbergen dprintk(DEBUG_ERROR, 6852bad8471SEric Van Hensbergen "couldn't find fid associated with dentry\n"); 6862bad8471SEric Van Hensbergen return -EBADF; 6872bad8471SEric Van Hensbergen } 6882bad8471SEric Van Hensbergen 6892bad8471SEric Van Hensbergen err = v9fs_t_stat(v9ses, fid->fid, &fcall); 6902bad8471SEric Van Hensbergen 6912bad8471SEric Van Hensbergen if (err < 0) 6922bad8471SEric Van Hensbergen dprintk(DEBUG_ERROR, "stat error\n"); 6932bad8471SEric Van Hensbergen else { 694531b1094SLatchesar Ionkov v9fs_stat2inode(&fcall->params.rstat.stat, dentry->d_inode, 6952bad8471SEric Van Hensbergen dentry->d_inode->i_sb); 6962bad8471SEric Van Hensbergen generic_fillattr(dentry->d_inode, stat); 6972bad8471SEric Van Hensbergen } 6982bad8471SEric Van Hensbergen 6992bad8471SEric Van Hensbergen kfree(fcall); 7002bad8471SEric Van Hensbergen return err; 7012bad8471SEric Van Hensbergen } 7022bad8471SEric Van Hensbergen 7032bad8471SEric Van Hensbergen /** 7042bad8471SEric Van Hensbergen * v9fs_vfs_setattr - set file metadata 7052bad8471SEric Van Hensbergen * @dentry: file whose metadata to set 7062bad8471SEric Van Hensbergen * @iattr: metadata assignment structure 7072bad8471SEric Van Hensbergen * 7082bad8471SEric Van Hensbergen */ 7092bad8471SEric Van Hensbergen 7102bad8471SEric Van Hensbergen static int v9fs_vfs_setattr(struct dentry *dentry, struct iattr *iattr) 7112bad8471SEric Van Hensbergen { 7122bad8471SEric Van Hensbergen struct v9fs_session_info *v9ses = v9fs_inode2v9ses(dentry->d_inode); 7130b8dd177SLatchesar Ionkov struct v9fs_fid *fid = v9fs_fid_lookup(dentry); 7142bad8471SEric Van Hensbergen struct v9fs_fcall *fcall = NULL; 715531b1094SLatchesar Ionkov struct v9fs_wstat wstat; 7162bad8471SEric Van Hensbergen int res = -EPERM; 7172bad8471SEric Van Hensbergen 7182bad8471SEric Van Hensbergen dprintk(DEBUG_VFS, "\n"); 71973c592b9SEric Van Hensbergen 7202bad8471SEric Van Hensbergen if (!fid) { 7212bad8471SEric Van Hensbergen dprintk(DEBUG_ERROR, 7222bad8471SEric Van Hensbergen "Couldn't find fid associated with dentry\n"); 7232bad8471SEric Van Hensbergen return -EBADF; 7242bad8471SEric Van Hensbergen } 7252bad8471SEric Van Hensbergen 726531b1094SLatchesar Ionkov v9fs_blank_wstat(&wstat); 7272bad8471SEric Van Hensbergen if (iattr->ia_valid & ATTR_MODE) 728531b1094SLatchesar Ionkov wstat.mode = unixmode2p9mode(v9ses, iattr->ia_mode); 7292bad8471SEric Van Hensbergen 7302bad8471SEric Van Hensbergen if (iattr->ia_valid & ATTR_MTIME) 731531b1094SLatchesar Ionkov wstat.mtime = iattr->ia_mtime.tv_sec; 7322bad8471SEric Van Hensbergen 7332bad8471SEric Van Hensbergen if (iattr->ia_valid & ATTR_ATIME) 734531b1094SLatchesar Ionkov wstat.atime = iattr->ia_atime.tv_sec; 7352bad8471SEric Van Hensbergen 7362bad8471SEric Van Hensbergen if (iattr->ia_valid & ATTR_SIZE) 737531b1094SLatchesar Ionkov wstat.length = iattr->ia_size; 7382bad8471SEric Van Hensbergen 7392bad8471SEric Van Hensbergen if (v9ses->extended) { 740531b1094SLatchesar Ionkov if (iattr->ia_valid & ATTR_UID) 741531b1094SLatchesar Ionkov wstat.n_uid = iattr->ia_uid; 7422bad8471SEric Van Hensbergen 743531b1094SLatchesar Ionkov if (iattr->ia_valid & ATTR_GID) 744531b1094SLatchesar Ionkov wstat.n_gid = iattr->ia_gid; 7452bad8471SEric Van Hensbergen } 7462bad8471SEric Van Hensbergen 747531b1094SLatchesar Ionkov res = v9fs_t_wstat(v9ses, fid->fid, &wstat, &fcall); 7482bad8471SEric Van Hensbergen 7492bad8471SEric Van Hensbergen if (res < 0) 750531b1094SLatchesar Ionkov PRINT_FCALL_ERROR("wstat error", fcall); 7512bad8471SEric Van Hensbergen 7522bad8471SEric Van Hensbergen kfree(fcall); 7532bad8471SEric Van Hensbergen if (res >= 0) 7542bad8471SEric Van Hensbergen res = inode_setattr(dentry->d_inode, iattr); 7552bad8471SEric Van Hensbergen 7562bad8471SEric Van Hensbergen return res; 7572bad8471SEric Van Hensbergen } 7582bad8471SEric Van Hensbergen 7592bad8471SEric Van Hensbergen /** 760531b1094SLatchesar Ionkov * v9fs_stat2inode - populate an inode structure with mistat info 761531b1094SLatchesar Ionkov * @stat: Plan 9 metadata (mistat) structure 7622bad8471SEric Van Hensbergen * @inode: inode to populate 7632bad8471SEric Van Hensbergen * @sb: superblock of filesystem 7642bad8471SEric Van Hensbergen * 7652bad8471SEric Van Hensbergen */ 7662bad8471SEric Van Hensbergen 7672bad8471SEric Van Hensbergen void 768531b1094SLatchesar Ionkov v9fs_stat2inode(struct v9fs_stat *stat, struct inode *inode, 7692bad8471SEric Van Hensbergen struct super_block *sb) 7702bad8471SEric Van Hensbergen { 7711dac06b2SLatchesar Ionkov int n; 772531b1094SLatchesar Ionkov char ext[32]; 7732bad8471SEric Van Hensbergen struct v9fs_session_info *v9ses = sb->s_fs_info; 7742bad8471SEric Van Hensbergen 7752bad8471SEric Van Hensbergen inode->i_nlink = 1; 7762bad8471SEric Van Hensbergen 777531b1094SLatchesar Ionkov inode->i_atime.tv_sec = stat->atime; 778531b1094SLatchesar Ionkov inode->i_mtime.tv_sec = stat->mtime; 779531b1094SLatchesar Ionkov inode->i_ctime.tv_sec = stat->mtime; 7802bad8471SEric Van Hensbergen 7812bad8471SEric Van Hensbergen inode->i_uid = v9ses->uid; 7822bad8471SEric Van Hensbergen inode->i_gid = v9ses->gid; 7832bad8471SEric Van Hensbergen 784531b1094SLatchesar Ionkov if (v9ses->extended) { 785531b1094SLatchesar Ionkov inode->i_uid = stat->n_uid; 786531b1094SLatchesar Ionkov inode->i_gid = stat->n_gid; 787531b1094SLatchesar Ionkov } 788531b1094SLatchesar Ionkov 789531b1094SLatchesar Ionkov inode->i_mode = p9mode2unixmode(v9ses, stat->mode); 7902bad8471SEric Van Hensbergen if ((S_ISBLK(inode->i_mode)) || (S_ISCHR(inode->i_mode))) { 7912bad8471SEric Van Hensbergen char type = 0; 7922bad8471SEric Van Hensbergen int major = -1; 7932bad8471SEric Van Hensbergen int minor = -1; 794531b1094SLatchesar Ionkov 7951dac06b2SLatchesar Ionkov n = stat->extension.len; 7961dac06b2SLatchesar Ionkov if (n > sizeof(ext)-1) 7971dac06b2SLatchesar Ionkov n = sizeof(ext)-1; 7981dac06b2SLatchesar Ionkov memmove(ext, stat->extension.str, n); 7991dac06b2SLatchesar Ionkov ext[n] = 0; 800531b1094SLatchesar Ionkov sscanf(ext, "%c %u %u", &type, &major, &minor); 8012bad8471SEric Van Hensbergen switch (type) { 8022bad8471SEric Van Hensbergen case 'c': 8032bad8471SEric Van Hensbergen inode->i_mode &= ~S_IFBLK; 8042bad8471SEric Van Hensbergen inode->i_mode |= S_IFCHR; 8052bad8471SEric Van Hensbergen break; 8062bad8471SEric Van Hensbergen case 'b': 8072bad8471SEric Van Hensbergen break; 8082bad8471SEric Van Hensbergen default: 809531b1094SLatchesar Ionkov dprintk(DEBUG_ERROR, "Unknown special type %c (%.*s)\n", 810531b1094SLatchesar Ionkov type, stat->extension.len, stat->extension.str); 8112bad8471SEric Van Hensbergen }; 8122bad8471SEric Van Hensbergen inode->i_rdev = MKDEV(major, minor); 8132bad8471SEric Van Hensbergen } else 8142bad8471SEric Van Hensbergen inode->i_rdev = 0; 8152bad8471SEric Van Hensbergen 816531b1094SLatchesar Ionkov inode->i_size = stat->length; 8172bad8471SEric Van Hensbergen 8182bad8471SEric Van Hensbergen inode->i_blksize = sb->s_blocksize; 8192bad8471SEric Van Hensbergen inode->i_blocks = 8202bad8471SEric Van Hensbergen (inode->i_size + inode->i_blksize - 1) >> sb->s_blocksize_bits; 8212bad8471SEric Van Hensbergen } 8222bad8471SEric Van Hensbergen 8232bad8471SEric Van Hensbergen /** 8242bad8471SEric Van Hensbergen * v9fs_qid2ino - convert qid into inode number 8252bad8471SEric Van Hensbergen * @qid: qid to hash 8262bad8471SEric Van Hensbergen * 8272bad8471SEric Van Hensbergen * BUG: potential for inode number collisions? 8282bad8471SEric Van Hensbergen */ 8292bad8471SEric Van Hensbergen 8302bad8471SEric Van Hensbergen ino_t v9fs_qid2ino(struct v9fs_qid *qid) 8312bad8471SEric Van Hensbergen { 8322bad8471SEric Van Hensbergen u64 path = qid->path + 2; 8332bad8471SEric Van Hensbergen ino_t i = 0; 8342bad8471SEric Van Hensbergen 8352bad8471SEric Van Hensbergen if (sizeof(ino_t) == sizeof(path)) 8362bad8471SEric Van Hensbergen memcpy(&i, &path, sizeof(ino_t)); 8372bad8471SEric Van Hensbergen else 8382bad8471SEric Van Hensbergen i = (ino_t) (path ^ (path >> 32)); 8392bad8471SEric Van Hensbergen 8402bad8471SEric Van Hensbergen return i; 8412bad8471SEric Van Hensbergen } 8422bad8471SEric Van Hensbergen 8432bad8471SEric Van Hensbergen /** 8442bad8471SEric Van Hensbergen * v9fs_readlink - read a symlink's location (internal version) 8452bad8471SEric Van Hensbergen * @dentry: dentry for symlink 84673c592b9SEric Van Hensbergen * @buffer: buffer to load symlink location into 8472bad8471SEric Van Hensbergen * @buflen: length of buffer 8482bad8471SEric Van Hensbergen * 8492bad8471SEric Van Hensbergen */ 8502bad8471SEric Van Hensbergen 8512bad8471SEric Van Hensbergen static int v9fs_readlink(struct dentry *dentry, char *buffer, int buflen) 8522bad8471SEric Van Hensbergen { 8532bad8471SEric Van Hensbergen int retval = -EPERM; 8542bad8471SEric Van Hensbergen 8552bad8471SEric Van Hensbergen struct v9fs_fcall *fcall = NULL; 8562bad8471SEric Van Hensbergen struct v9fs_session_info *v9ses = v9fs_inode2v9ses(dentry->d_inode); 8570b8dd177SLatchesar Ionkov struct v9fs_fid *fid = v9fs_fid_lookup(dentry); 8582bad8471SEric Van Hensbergen 8592bad8471SEric Van Hensbergen if (!fid) { 8602bad8471SEric Van Hensbergen dprintk(DEBUG_ERROR, "could not resolve fid from dentry\n"); 8612bad8471SEric Van Hensbergen retval = -EBADF; 8622bad8471SEric Van Hensbergen goto FreeFcall; 8632bad8471SEric Van Hensbergen } 8642bad8471SEric Van Hensbergen 8652bad8471SEric Van Hensbergen if (!v9ses->extended) { 8662bad8471SEric Van Hensbergen retval = -EBADF; 8672bad8471SEric Van Hensbergen dprintk(DEBUG_ERROR, "not extended\n"); 8682bad8471SEric Van Hensbergen goto FreeFcall; 8692bad8471SEric Van Hensbergen } 8702bad8471SEric Van Hensbergen 8712bad8471SEric Van Hensbergen dprintk(DEBUG_VFS, " %s\n", dentry->d_name.name); 8722bad8471SEric Van Hensbergen retval = v9fs_t_stat(v9ses, fid->fid, &fcall); 8732bad8471SEric Van Hensbergen 8742bad8471SEric Van Hensbergen if (retval < 0) { 8752bad8471SEric Van Hensbergen dprintk(DEBUG_ERROR, "stat error\n"); 8762bad8471SEric Van Hensbergen goto FreeFcall; 8772bad8471SEric Van Hensbergen } 8782bad8471SEric Van Hensbergen 8792bad8471SEric Van Hensbergen if (!fcall) 8802bad8471SEric Van Hensbergen return -EIO; 8812bad8471SEric Van Hensbergen 882531b1094SLatchesar Ionkov if (!(fcall->params.rstat.stat.mode & V9FS_DMSYMLINK)) { 8832bad8471SEric Van Hensbergen retval = -EINVAL; 8842bad8471SEric Van Hensbergen goto FreeFcall; 8852bad8471SEric Van Hensbergen } 8862bad8471SEric Van Hensbergen 8872bad8471SEric Van Hensbergen /* copy extension buffer into buffer */ 888531b1094SLatchesar Ionkov if (fcall->params.rstat.stat.extension.len < buflen) 889531b1094SLatchesar Ionkov buflen = fcall->params.rstat.stat.extension.len; 8902bad8471SEric Van Hensbergen 891531b1094SLatchesar Ionkov memcpy(buffer, fcall->params.rstat.stat.extension.str, buflen - 1); 892531b1094SLatchesar Ionkov buffer[buflen-1] = 0; 8932bad8471SEric Van Hensbergen 8942bad8471SEric Van Hensbergen retval = buflen; 8952bad8471SEric Van Hensbergen 8962bad8471SEric Van Hensbergen FreeFcall: 8972bad8471SEric Van Hensbergen kfree(fcall); 8982bad8471SEric Van Hensbergen 8992bad8471SEric Van Hensbergen return retval; 9002bad8471SEric Van Hensbergen } 9012bad8471SEric Van Hensbergen 9022bad8471SEric Van Hensbergen /** 9032bad8471SEric Van Hensbergen * v9fs_vfs_readlink - read a symlink's location 9042bad8471SEric Van Hensbergen * @dentry: dentry for symlink 9052bad8471SEric Van Hensbergen * @buf: buffer to load symlink location into 9062bad8471SEric Van Hensbergen * @buflen: length of buffer 9072bad8471SEric Van Hensbergen * 9082bad8471SEric Van Hensbergen */ 9092bad8471SEric Van Hensbergen 9102bad8471SEric Van Hensbergen static int v9fs_vfs_readlink(struct dentry *dentry, char __user * buffer, 9112bad8471SEric Van Hensbergen int buflen) 9122bad8471SEric Van Hensbergen { 9132bad8471SEric Van Hensbergen int retval; 9142bad8471SEric Van Hensbergen int ret; 9152bad8471SEric Van Hensbergen char *link = __getname(); 9162bad8471SEric Van Hensbergen 917a1f9d8d2SLatchesar Ionkov if (buflen > PATH_MAX) 918a1f9d8d2SLatchesar Ionkov buflen = PATH_MAX; 9192bad8471SEric Van Hensbergen 9202bad8471SEric Van Hensbergen dprintk(DEBUG_VFS, " dentry: %s (%p)\n", dentry->d_iname, dentry); 9212bad8471SEric Van Hensbergen 9222bad8471SEric Van Hensbergen retval = v9fs_readlink(dentry, link, buflen); 9232bad8471SEric Van Hensbergen 9242bad8471SEric Van Hensbergen if (retval > 0) { 9252bad8471SEric Van Hensbergen if ((ret = copy_to_user(buffer, link, retval)) != 0) { 9262bad8471SEric Van Hensbergen dprintk(DEBUG_ERROR, "problem copying to user: %d\n", 9272bad8471SEric Van Hensbergen ret); 9282bad8471SEric Van Hensbergen retval = ret; 9292bad8471SEric Van Hensbergen } 9302bad8471SEric Van Hensbergen } 9312bad8471SEric Van Hensbergen 932ce44eeb6SDavi Arnaut __putname(link); 9332bad8471SEric Van Hensbergen return retval; 9342bad8471SEric Van Hensbergen } 9352bad8471SEric Van Hensbergen 9362bad8471SEric Van Hensbergen /** 9372bad8471SEric Van Hensbergen * v9fs_vfs_follow_link - follow a symlink path 9382bad8471SEric Van Hensbergen * @dentry: dentry for symlink 9392bad8471SEric Van Hensbergen * @nd: nameidata 9402bad8471SEric Van Hensbergen * 9412bad8471SEric Van Hensbergen */ 9422bad8471SEric Van Hensbergen 9432bad8471SEric Van Hensbergen static void *v9fs_vfs_follow_link(struct dentry *dentry, struct nameidata *nd) 9442bad8471SEric Van Hensbergen { 9452bad8471SEric Van Hensbergen int len = 0; 9462bad8471SEric Van Hensbergen char *link = __getname(); 9472bad8471SEric Van Hensbergen 9482bad8471SEric Van Hensbergen dprintk(DEBUG_VFS, "%s n", dentry->d_name.name); 9492bad8471SEric Van Hensbergen 9502bad8471SEric Van Hensbergen if (!link) 9512bad8471SEric Van Hensbergen link = ERR_PTR(-ENOMEM); 9522bad8471SEric Van Hensbergen else { 9532bad8471SEric Van Hensbergen len = v9fs_readlink(dentry, link, strlen(link)); 9542bad8471SEric Van Hensbergen 9552bad8471SEric Van Hensbergen if (len < 0) { 956ce44eeb6SDavi Arnaut __putname(link); 9572bad8471SEric Van Hensbergen link = ERR_PTR(len); 9582bad8471SEric Van Hensbergen } else 9592bad8471SEric Van Hensbergen link[len] = 0; 9602bad8471SEric Van Hensbergen } 9612bad8471SEric Van Hensbergen nd_set_link(nd, link); 9622bad8471SEric Van Hensbergen 9632bad8471SEric Van Hensbergen return NULL; 9642bad8471SEric Van Hensbergen } 9652bad8471SEric Van Hensbergen 9662bad8471SEric Van Hensbergen /** 9672bad8471SEric Van Hensbergen * v9fs_vfs_put_link - release a symlink path 9682bad8471SEric Van Hensbergen * @dentry: dentry for symlink 9692bad8471SEric Van Hensbergen * @nd: nameidata 9702bad8471SEric Van Hensbergen * 9712bad8471SEric Van Hensbergen */ 9722bad8471SEric Van Hensbergen 9732bad8471SEric Van Hensbergen static void v9fs_vfs_put_link(struct dentry *dentry, struct nameidata *nd, void *p) 9742bad8471SEric Van Hensbergen { 9752bad8471SEric Van Hensbergen char *s = nd_get_link(nd); 9762bad8471SEric Van Hensbergen 9772bad8471SEric Van Hensbergen dprintk(DEBUG_VFS, " %s %s\n", dentry->d_name.name, s); 9782bad8471SEric Van Hensbergen if (!IS_ERR(s)) 979ce44eeb6SDavi Arnaut __putname(s); 9802bad8471SEric Van Hensbergen } 9812bad8471SEric Van Hensbergen 982531b1094SLatchesar Ionkov static int v9fs_vfs_mkspecial(struct inode *dir, struct dentry *dentry, 983531b1094SLatchesar Ionkov int mode, const char *extension) 984531b1094SLatchesar Ionkov { 985531b1094SLatchesar Ionkov int err, retval; 986531b1094SLatchesar Ionkov struct v9fs_session_info *v9ses; 987531b1094SLatchesar Ionkov struct v9fs_fcall *fcall; 988531b1094SLatchesar Ionkov struct v9fs_fid *fid; 989531b1094SLatchesar Ionkov struct v9fs_wstat wstat; 990531b1094SLatchesar Ionkov 991531b1094SLatchesar Ionkov v9ses = v9fs_inode2v9ses(dir); 992531b1094SLatchesar Ionkov retval = -EPERM; 993531b1094SLatchesar Ionkov fcall = NULL; 994531b1094SLatchesar Ionkov 995531b1094SLatchesar Ionkov if (!v9ses->extended) { 996531b1094SLatchesar Ionkov dprintk(DEBUG_ERROR, "not extended\n"); 997531b1094SLatchesar Ionkov goto free_mem; 998531b1094SLatchesar Ionkov } 999531b1094SLatchesar Ionkov 1000531b1094SLatchesar Ionkov /* issue a create */ 1001531b1094SLatchesar Ionkov retval = v9fs_create(dir, dentry, mode, 0); 1002531b1094SLatchesar Ionkov if (retval != 0) 1003531b1094SLatchesar Ionkov goto free_mem; 1004531b1094SLatchesar Ionkov 1005531b1094SLatchesar Ionkov fid = v9fs_fid_get_created(dentry); 1006531b1094SLatchesar Ionkov if (!fid) { 1007531b1094SLatchesar Ionkov dprintk(DEBUG_ERROR, "couldn't resolve fid from dentry\n"); 1008531b1094SLatchesar Ionkov goto free_mem; 1009531b1094SLatchesar Ionkov } 1010531b1094SLatchesar Ionkov 1011531b1094SLatchesar Ionkov /* issue a Twstat */ 1012531b1094SLatchesar Ionkov v9fs_blank_wstat(&wstat); 1013531b1094SLatchesar Ionkov wstat.muid = v9ses->name; 1014531b1094SLatchesar Ionkov wstat.extension = (char *) extension; 1015531b1094SLatchesar Ionkov retval = v9fs_t_wstat(v9ses, fid->fid, &wstat, &fcall); 1016531b1094SLatchesar Ionkov if (retval < 0) { 1017531b1094SLatchesar Ionkov PRINT_FCALL_ERROR("wstat error", fcall); 1018531b1094SLatchesar Ionkov goto free_mem; 1019531b1094SLatchesar Ionkov } 1020531b1094SLatchesar Ionkov 1021531b1094SLatchesar Ionkov err = v9fs_t_clunk(v9ses, fid->fid); 1022531b1094SLatchesar Ionkov if (err < 0) { 1023531b1094SLatchesar Ionkov dprintk(DEBUG_ERROR, "clunk failed: %d\n", err); 1024531b1094SLatchesar Ionkov goto free_mem; 1025531b1094SLatchesar Ionkov } 1026531b1094SLatchesar Ionkov 1027531b1094SLatchesar Ionkov d_drop(dentry); /* FID - will this also clunk? */ 1028531b1094SLatchesar Ionkov 1029531b1094SLatchesar Ionkov free_mem: 1030531b1094SLatchesar Ionkov kfree(fcall); 1031531b1094SLatchesar Ionkov return retval; 1032531b1094SLatchesar Ionkov } 1033531b1094SLatchesar Ionkov 1034531b1094SLatchesar Ionkov /** 1035531b1094SLatchesar Ionkov * v9fs_vfs_symlink - helper function to create symlinks 1036531b1094SLatchesar Ionkov * @dir: directory inode containing symlink 1037531b1094SLatchesar Ionkov * @dentry: dentry for symlink 1038531b1094SLatchesar Ionkov * @symname: symlink data 1039531b1094SLatchesar Ionkov * 1040531b1094SLatchesar Ionkov * See 9P2000.u RFC for more information 1041531b1094SLatchesar Ionkov * 1042531b1094SLatchesar Ionkov */ 1043531b1094SLatchesar Ionkov 1044531b1094SLatchesar Ionkov static int 1045531b1094SLatchesar Ionkov v9fs_vfs_symlink(struct inode *dir, struct dentry *dentry, const char *symname) 1046531b1094SLatchesar Ionkov { 1047531b1094SLatchesar Ionkov dprintk(DEBUG_VFS, " %lu,%s,%s\n", dir->i_ino, dentry->d_name.name, 1048531b1094SLatchesar Ionkov symname); 1049531b1094SLatchesar Ionkov 1050531b1094SLatchesar Ionkov return v9fs_vfs_mkspecial(dir, dentry, S_IFLNK, symname); 1051531b1094SLatchesar Ionkov } 1052531b1094SLatchesar Ionkov 10532bad8471SEric Van Hensbergen /** 10542bad8471SEric Van Hensbergen * v9fs_vfs_link - create a hardlink 10552bad8471SEric Van Hensbergen * @old_dentry: dentry for file to link to 10562bad8471SEric Van Hensbergen * @dir: inode destination for new link 105773c592b9SEric Van Hensbergen * @dentry: dentry for link 10582bad8471SEric Van Hensbergen * 10592bad8471SEric Van Hensbergen */ 10602bad8471SEric Van Hensbergen 10612bad8471SEric Van Hensbergen /* XXX - lots of code dup'd from symlink and creates, 10622bad8471SEric Van Hensbergen * figure out a better reuse strategy 10632bad8471SEric Van Hensbergen */ 10642bad8471SEric Van Hensbergen 10652bad8471SEric Van Hensbergen static int 10662bad8471SEric Van Hensbergen v9fs_vfs_link(struct dentry *old_dentry, struct inode *dir, 10672bad8471SEric Van Hensbergen struct dentry *dentry) 10682bad8471SEric Van Hensbergen { 1069531b1094SLatchesar Ionkov int retval; 1070531b1094SLatchesar Ionkov struct v9fs_fid *oldfid; 1071531b1094SLatchesar Ionkov char *name; 10722bad8471SEric Van Hensbergen 10732bad8471SEric Van Hensbergen dprintk(DEBUG_VFS, " %lu,%s,%s\n", dir->i_ino, dentry->d_name.name, 10742bad8471SEric Van Hensbergen old_dentry->d_name.name); 10752bad8471SEric Van Hensbergen 1076531b1094SLatchesar Ionkov oldfid = v9fs_fid_lookup(old_dentry); 1077531b1094SLatchesar Ionkov if (!oldfid) { 1078531b1094SLatchesar Ionkov dprintk(DEBUG_ERROR, "can't find oldfid\n"); 1079531b1094SLatchesar Ionkov return -EPERM; 10802bad8471SEric Van Hensbergen } 10812bad8471SEric Van Hensbergen 1082531b1094SLatchesar Ionkov name = __getname(); 1083531b1094SLatchesar Ionkov sprintf(name, "hardlink(%d)\n", oldfid->fid); 1084531b1094SLatchesar Ionkov retval = v9fs_vfs_mkspecial(dir, dentry, V9FS_DMLINK, name); 1085531b1094SLatchesar Ionkov __putname(name); 10862bad8471SEric Van Hensbergen 10872bad8471SEric Van Hensbergen return retval; 10882bad8471SEric Van Hensbergen } 10892bad8471SEric Van Hensbergen 10902bad8471SEric Van Hensbergen /** 10912bad8471SEric Van Hensbergen * v9fs_vfs_mknod - create a special file 10922bad8471SEric Van Hensbergen * @dir: inode destination for new link 10932bad8471SEric Van Hensbergen * @dentry: dentry for file 10942bad8471SEric Van Hensbergen * @mode: mode for creation 10952bad8471SEric Van Hensbergen * @dev_t: device associated with special file 10962bad8471SEric Van Hensbergen * 10972bad8471SEric Van Hensbergen */ 10982bad8471SEric Van Hensbergen 10992bad8471SEric Van Hensbergen static int 11002bad8471SEric Van Hensbergen v9fs_vfs_mknod(struct inode *dir, struct dentry *dentry, int mode, dev_t rdev) 11012bad8471SEric Van Hensbergen { 1102531b1094SLatchesar Ionkov int retval; 1103531b1094SLatchesar Ionkov char *name; 11042bad8471SEric Van Hensbergen 11052bad8471SEric Van Hensbergen dprintk(DEBUG_VFS, " %lu,%s mode: %x MAJOR: %u MINOR: %u\n", dir->i_ino, 11062bad8471SEric Van Hensbergen dentry->d_name.name, mode, MAJOR(rdev), MINOR(rdev)); 11072bad8471SEric Van Hensbergen 1108531b1094SLatchesar Ionkov if (!new_valid_dev(rdev)) 1109531b1094SLatchesar Ionkov return -EINVAL; 111073c592b9SEric Van Hensbergen 1111531b1094SLatchesar Ionkov name = __getname(); 11122bad8471SEric Van Hensbergen /* build extension */ 11132bad8471SEric Van Hensbergen if (S_ISBLK(mode)) 1114531b1094SLatchesar Ionkov sprintf(name, "b %u %u", MAJOR(rdev), MINOR(rdev)); 11152bad8471SEric Van Hensbergen else if (S_ISCHR(mode)) 1116531b1094SLatchesar Ionkov sprintf(name, "c %u %u", MAJOR(rdev), MINOR(rdev)); 111773c592b9SEric Van Hensbergen else if (S_ISFIFO(mode)) 1118531b1094SLatchesar Ionkov *name = 0; 11192bad8471SEric Van Hensbergen else { 1120531b1094SLatchesar Ionkov __putname(name); 1121531b1094SLatchesar Ionkov return -EINVAL; 11222bad8471SEric Van Hensbergen } 11232bad8471SEric Van Hensbergen 1124531b1094SLatchesar Ionkov retval = v9fs_vfs_mkspecial(dir, dentry, mode, name); 1125531b1094SLatchesar Ionkov __putname(name); 11262bad8471SEric Van Hensbergen 11272bad8471SEric Van Hensbergen return retval; 11282bad8471SEric Van Hensbergen } 11292bad8471SEric Van Hensbergen 1130b501611aSEric Van Hensbergen static struct inode_operations v9fs_dir_inode_operations_ext = { 11312bad8471SEric Van Hensbergen .create = v9fs_vfs_create, 11322bad8471SEric Van Hensbergen .lookup = v9fs_vfs_lookup, 11332bad8471SEric Van Hensbergen .symlink = v9fs_vfs_symlink, 11342bad8471SEric Van Hensbergen .link = v9fs_vfs_link, 11352bad8471SEric Van Hensbergen .unlink = v9fs_vfs_unlink, 11362bad8471SEric Van Hensbergen .mkdir = v9fs_vfs_mkdir, 11372bad8471SEric Van Hensbergen .rmdir = v9fs_vfs_rmdir, 11382bad8471SEric Van Hensbergen .mknod = v9fs_vfs_mknod, 11392bad8471SEric Van Hensbergen .rename = v9fs_vfs_rename, 11402bad8471SEric Van Hensbergen .readlink = v9fs_vfs_readlink, 11412bad8471SEric Van Hensbergen .getattr = v9fs_vfs_getattr, 11422bad8471SEric Van Hensbergen .setattr = v9fs_vfs_setattr, 11432bad8471SEric Van Hensbergen }; 11442bad8471SEric Van Hensbergen 1145b501611aSEric Van Hensbergen static struct inode_operations v9fs_dir_inode_operations = { 1146b501611aSEric Van Hensbergen .create = v9fs_vfs_create, 1147b501611aSEric Van Hensbergen .lookup = v9fs_vfs_lookup, 1148b501611aSEric Van Hensbergen .unlink = v9fs_vfs_unlink, 1149b501611aSEric Van Hensbergen .mkdir = v9fs_vfs_mkdir, 1150b501611aSEric Van Hensbergen .rmdir = v9fs_vfs_rmdir, 1151b501611aSEric Van Hensbergen .mknod = v9fs_vfs_mknod, 1152b501611aSEric Van Hensbergen .rename = v9fs_vfs_rename, 1153b501611aSEric Van Hensbergen .getattr = v9fs_vfs_getattr, 1154b501611aSEric Van Hensbergen .setattr = v9fs_vfs_setattr, 1155b501611aSEric Van Hensbergen }; 1156b501611aSEric Van Hensbergen 11572bad8471SEric Van Hensbergen static struct inode_operations v9fs_file_inode_operations = { 11582bad8471SEric Van Hensbergen .getattr = v9fs_vfs_getattr, 11592bad8471SEric Van Hensbergen .setattr = v9fs_vfs_setattr, 11602bad8471SEric Van Hensbergen }; 11612bad8471SEric Van Hensbergen 11622bad8471SEric Van Hensbergen static struct inode_operations v9fs_symlink_inode_operations = { 11632bad8471SEric Van Hensbergen .readlink = v9fs_vfs_readlink, 11642bad8471SEric Van Hensbergen .follow_link = v9fs_vfs_follow_link, 11652bad8471SEric Van Hensbergen .put_link = v9fs_vfs_put_link, 11662bad8471SEric Van Hensbergen .getattr = v9fs_vfs_getattr, 11672bad8471SEric Van Hensbergen .setattr = v9fs_vfs_setattr, 11682bad8471SEric Van Hensbergen }; 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