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; 180147b31cfSEric Van Hensbergen inode->i_mapping->a_ops = &v9fs_addr_operations; 1812bad8471SEric Van Hensbergen 1822bad8471SEric Van Hensbergen switch (mode & S_IFMT) { 1832bad8471SEric Van Hensbergen case S_IFIFO: 1842bad8471SEric Van Hensbergen case S_IFBLK: 1852bad8471SEric Van Hensbergen case S_IFCHR: 1862bad8471SEric Van Hensbergen case S_IFSOCK: 187b501611aSEric Van Hensbergen if(!v9ses->extended) { 188b501611aSEric Van Hensbergen dprintk(DEBUG_ERROR, "special files without extended mode\n"); 189b501611aSEric Van Hensbergen return ERR_PTR(-EINVAL); 190b501611aSEric Van Hensbergen } 1915d58bec5SEric Van Hensbergen init_special_inode(inode, inode->i_mode, 1925d58bec5SEric Van Hensbergen inode->i_rdev); 1935d58bec5SEric Van Hensbergen break; 1942bad8471SEric Van Hensbergen case S_IFREG: 1952bad8471SEric Van Hensbergen inode->i_op = &v9fs_file_inode_operations; 1962bad8471SEric Van Hensbergen inode->i_fop = &v9fs_file_operations; 1972bad8471SEric Van Hensbergen break; 198b501611aSEric Van Hensbergen case S_IFLNK: 199b501611aSEric Van Hensbergen if(!v9ses->extended) { 200b501611aSEric Van Hensbergen dprintk(DEBUG_ERROR, "extended modes used w/o 9P2000.u\n"); 201b501611aSEric Van Hensbergen return ERR_PTR(-EINVAL); 202b501611aSEric Van Hensbergen } 203b501611aSEric Van Hensbergen inode->i_op = &v9fs_symlink_inode_operations; 204b501611aSEric Van Hensbergen break; 2052bad8471SEric Van Hensbergen case S_IFDIR: 2062bad8471SEric Van Hensbergen inode->i_nlink++; 207b501611aSEric Van Hensbergen if(v9ses->extended) 208b501611aSEric Van Hensbergen inode->i_op = &v9fs_dir_inode_operations_ext; 209b501611aSEric Van Hensbergen else 2102bad8471SEric Van Hensbergen inode->i_op = &v9fs_dir_inode_operations; 2112bad8471SEric Van Hensbergen inode->i_fop = &v9fs_dir_operations; 2122bad8471SEric Van Hensbergen break; 2132bad8471SEric Van Hensbergen default: 2142bad8471SEric Van Hensbergen dprintk(DEBUG_ERROR, "BAD mode 0x%x S_IFMT 0x%x\n", 2152bad8471SEric Van Hensbergen mode, mode & S_IFMT); 2162bad8471SEric Van Hensbergen return ERR_PTR(-EINVAL); 2172bad8471SEric Van Hensbergen } 2182bad8471SEric Van Hensbergen } else { 2192bad8471SEric Van Hensbergen eprintk(KERN_WARNING, "Problem allocating inode\n"); 2202bad8471SEric Van Hensbergen return ERR_PTR(-ENOMEM); 2212bad8471SEric Van Hensbergen } 2222bad8471SEric Van Hensbergen return inode; 2232bad8471SEric Van Hensbergen } 2242bad8471SEric Van Hensbergen 2252bad8471SEric Van Hensbergen /** 2262bad8471SEric Van Hensbergen * v9fs_create - helper function to create files and directories 2272bad8471SEric Van Hensbergen * @dir: directory inode file is being created in 2282bad8471SEric Van Hensbergen * @file_dentry: dentry file is being created in 2292bad8471SEric Van Hensbergen * @perm: permissions file is being created with 23073c592b9SEric Van Hensbergen * @open_mode: resulting open mode for file 2312bad8471SEric Van Hensbergen * 2322bad8471SEric Van Hensbergen */ 2332bad8471SEric Van Hensbergen 2342bad8471SEric Van Hensbergen static int 2352bad8471SEric Van Hensbergen v9fs_create(struct inode *dir, 2362bad8471SEric Van Hensbergen struct dentry *file_dentry, 2372bad8471SEric Van Hensbergen unsigned int perm, unsigned int open_mode) 2382bad8471SEric Van Hensbergen { 2392bad8471SEric Van Hensbergen struct v9fs_session_info *v9ses = v9fs_inode2v9ses(dir); 2402bad8471SEric Van Hensbergen struct super_block *sb = dir->i_sb; 2412bad8471SEric Van Hensbergen struct v9fs_fid *dirfid = 2420b8dd177SLatchesar Ionkov v9fs_fid_lookup(file_dentry->d_parent); 2432bad8471SEric Van Hensbergen struct v9fs_fid *fid = NULL; 2442bad8471SEric Van Hensbergen struct inode *file_inode = NULL; 2452bad8471SEric Van Hensbergen struct v9fs_fcall *fcall = NULL; 2462bad8471SEric Van Hensbergen struct v9fs_qid qid; 2472bad8471SEric Van Hensbergen int dirfidnum = -1; 2482bad8471SEric Van Hensbergen long newfid = -1; 2492bad8471SEric Van Hensbergen int result = 0; 2502bad8471SEric Van Hensbergen unsigned int iounit = 0; 2510b8dd177SLatchesar Ionkov int wfidno = -1; 2523cf6429aSLatchesar Ionkov int err; 2532bad8471SEric Van Hensbergen 2542bad8471SEric Van Hensbergen perm = unixmode2p9mode(v9ses, perm); 2552bad8471SEric Van Hensbergen 2562bad8471SEric Van Hensbergen dprintk(DEBUG_VFS, "dir: %p dentry: %p perm: %o mode: %o\n", dir, 2572bad8471SEric Van Hensbergen file_dentry, perm, open_mode); 2582bad8471SEric Van Hensbergen 2592bad8471SEric Van Hensbergen if (!dirfid) 2602bad8471SEric Van Hensbergen return -EBADF; 2612bad8471SEric Van Hensbergen 2622bad8471SEric Van Hensbergen dirfidnum = dirfid->fid; 2632bad8471SEric Van Hensbergen if (dirfidnum < 0) { 2642bad8471SEric Van Hensbergen dprintk(DEBUG_ERROR, "No fid for the directory #%lu\n", 2652bad8471SEric Van Hensbergen dir->i_ino); 2662bad8471SEric Van Hensbergen return -EBADF; 2672bad8471SEric Van Hensbergen } 2682bad8471SEric Van Hensbergen 2692bad8471SEric Van Hensbergen if (file_dentry->d_inode) { 2702bad8471SEric Van Hensbergen dprintk(DEBUG_ERROR, 2712bad8471SEric Van Hensbergen "Odd. There is an inode for dir %lu, name :%s:\n", 2722bad8471SEric Van Hensbergen dir->i_ino, file_dentry->d_name.name); 2732bad8471SEric Van Hensbergen return -EEXIST; 2742bad8471SEric Van Hensbergen } 2752bad8471SEric Van Hensbergen 2762bad8471SEric Van Hensbergen newfid = v9fs_get_idpool(&v9ses->fidpool); 2772bad8471SEric Van Hensbergen if (newfid < 0) { 2782bad8471SEric Van Hensbergen eprintk(KERN_WARNING, "no free fids available\n"); 2792bad8471SEric Van Hensbergen return -ENOSPC; 2802bad8471SEric Van Hensbergen } 2812bad8471SEric Van Hensbergen 2822bad8471SEric Van Hensbergen result = v9fs_t_walk(v9ses, dirfidnum, newfid, NULL, &fcall); 2832bad8471SEric Van Hensbergen if (result < 0) { 284531b1094SLatchesar Ionkov PRINT_FCALL_ERROR("clone error", fcall); 2852bad8471SEric Van Hensbergen v9fs_put_idpool(newfid, &v9ses->fidpool); 2860b8dd177SLatchesar Ionkov newfid = -1; 2872bad8471SEric Van Hensbergen goto CleanUpFid; 2882bad8471SEric Van Hensbergen } 2892bad8471SEric Van Hensbergen 2902bad8471SEric Van Hensbergen kfree(fcall); 2913cf6429aSLatchesar Ionkov fcall = NULL; 2922bad8471SEric Van Hensbergen 2932bad8471SEric Van Hensbergen result = v9fs_t_create(v9ses, newfid, (char *)file_dentry->d_name.name, 2942bad8471SEric Van Hensbergen perm, open_mode, &fcall); 2952bad8471SEric Van Hensbergen if (result < 0) { 296531b1094SLatchesar Ionkov PRINT_FCALL_ERROR("create fails", fcall); 2972bad8471SEric Van Hensbergen goto CleanUpFid; 2982bad8471SEric Van Hensbergen } 2992bad8471SEric Van Hensbergen 3002bad8471SEric Van Hensbergen iounit = fcall->params.rcreate.iounit; 3012bad8471SEric Van Hensbergen qid = fcall->params.rcreate.qid; 3022bad8471SEric Van Hensbergen kfree(fcall); 3033cf6429aSLatchesar Ionkov fcall = NULL; 3042bad8471SEric Van Hensbergen 3053cf6429aSLatchesar Ionkov if (!(perm&V9FS_DMDIR)) { 3060b8dd177SLatchesar Ionkov fid = v9fs_fid_create(file_dentry, v9ses, newfid, 1); 3070b8dd177SLatchesar Ionkov dprintk(DEBUG_VFS, "fid %p %d\n", fid, fid->fidcreate); 3082bad8471SEric Van Hensbergen if (!fid) { 3092bad8471SEric Van Hensbergen result = -ENOMEM; 3102bad8471SEric Van Hensbergen goto CleanUpFid; 3112bad8471SEric Van Hensbergen } 3122bad8471SEric Van Hensbergen 3132bad8471SEric Van Hensbergen fid->qid = qid; 3142bad8471SEric Van Hensbergen fid->iounit = iounit; 3153cf6429aSLatchesar Ionkov } else { 3163cf6429aSLatchesar Ionkov err = v9fs_t_clunk(v9ses, newfid); 317d8da097aSLatchesar Ionkov newfid = -1; 3183cf6429aSLatchesar Ionkov if (err < 0) 3193cf6429aSLatchesar Ionkov dprintk(DEBUG_ERROR, "clunk for mkdir failed: %d\n", err); 3203cf6429aSLatchesar Ionkov } 3210b8dd177SLatchesar Ionkov 3220b8dd177SLatchesar Ionkov /* walk to the newly created file and put the fid in the dentry */ 3230b8dd177SLatchesar Ionkov wfidno = v9fs_get_idpool(&v9ses->fidpool); 324d8da097aSLatchesar Ionkov if (wfidno < 0) { 3250b8dd177SLatchesar Ionkov eprintk(KERN_WARNING, "no free fids available\n"); 3260b8dd177SLatchesar Ionkov return -ENOSPC; 3270b8dd177SLatchesar Ionkov } 3280b8dd177SLatchesar Ionkov 3290b8dd177SLatchesar Ionkov result = v9fs_t_walk(v9ses, dirfidnum, wfidno, 3303cf6429aSLatchesar Ionkov (char *) file_dentry->d_name.name, &fcall); 3310b8dd177SLatchesar Ionkov if (result < 0) { 332531b1094SLatchesar Ionkov PRINT_FCALL_ERROR("clone error", fcall); 3330b8dd177SLatchesar Ionkov v9fs_put_idpool(wfidno, &v9ses->fidpool); 3340b8dd177SLatchesar Ionkov wfidno = -1; 3350b8dd177SLatchesar Ionkov goto CleanUpFid; 3360b8dd177SLatchesar Ionkov } 3373cf6429aSLatchesar Ionkov kfree(fcall); 3383cf6429aSLatchesar Ionkov fcall = NULL; 3390b8dd177SLatchesar Ionkov 3400b8dd177SLatchesar Ionkov if (!v9fs_fid_create(file_dentry, v9ses, wfidno, 0)) { 3410b8dd177SLatchesar Ionkov v9fs_put_idpool(wfidno, &v9ses->fidpool); 3420b8dd177SLatchesar Ionkov 3430b8dd177SLatchesar Ionkov goto CleanUpFid; 3440b8dd177SLatchesar Ionkov } 3452bad8471SEric Van Hensbergen 3462bad8471SEric Van Hensbergen if ((perm & V9FS_DMSYMLINK) || (perm & V9FS_DMLINK) || 3472bad8471SEric Van Hensbergen (perm & V9FS_DMNAMEDPIPE) || (perm & V9FS_DMSOCKET) || 3482bad8471SEric Van Hensbergen (perm & V9FS_DMDEVICE)) 3492bad8471SEric Van Hensbergen return 0; 3502bad8471SEric Van Hensbergen 351d8da097aSLatchesar Ionkov result = v9fs_t_stat(v9ses, wfidno, &fcall); 3522bad8471SEric Van Hensbergen if (result < 0) { 353531b1094SLatchesar Ionkov PRINT_FCALL_ERROR("stat error", fcall); 3542bad8471SEric Van Hensbergen goto CleanUpFid; 3552bad8471SEric Van Hensbergen } 3562bad8471SEric Van Hensbergen 3572bad8471SEric Van Hensbergen 358531b1094SLatchesar Ionkov file_inode = v9fs_get_inode(sb, 359531b1094SLatchesar Ionkov p9mode2unixmode(v9ses, fcall->params.rstat.stat.mode)); 360531b1094SLatchesar Ionkov 3612bad8471SEric Van Hensbergen if ((!file_inode) || IS_ERR(file_inode)) { 3622bad8471SEric Van Hensbergen dprintk(DEBUG_ERROR, "create inode failed\n"); 3632bad8471SEric Van Hensbergen result = -EBADF; 3642bad8471SEric Van Hensbergen goto CleanUpFid; 3652bad8471SEric Van Hensbergen } 3662bad8471SEric Van Hensbergen 367531b1094SLatchesar Ionkov v9fs_stat2inode(&fcall->params.rstat.stat, file_inode, sb); 3682bad8471SEric Van Hensbergen kfree(fcall); 369a93a117eSLatchesar Ionkov fcall = NULL; 370a93a117eSLatchesar Ionkov file_dentry->d_op = &v9fs_dentry_operations; 3712bad8471SEric Van Hensbergen d_instantiate(file_dentry, file_inode); 3722bad8471SEric Van Hensbergen 3732bad8471SEric Van Hensbergen return 0; 3742bad8471SEric Van Hensbergen 3752bad8471SEric Van Hensbergen CleanUpFid: 3762bad8471SEric Van Hensbergen kfree(fcall); 3773cf6429aSLatchesar Ionkov fcall = NULL; 3782bad8471SEric Van Hensbergen 3790b8dd177SLatchesar Ionkov if (newfid >= 0) { 3803cf6429aSLatchesar Ionkov err = v9fs_t_clunk(v9ses, newfid); 3813cf6429aSLatchesar Ionkov if (err < 0) 3823cf6429aSLatchesar Ionkov dprintk(DEBUG_ERROR, "clunk failed: %d\n", err); 3830b8dd177SLatchesar Ionkov } 3840b8dd177SLatchesar Ionkov if (wfidno >= 0) { 3853cf6429aSLatchesar Ionkov err = v9fs_t_clunk(v9ses, wfidno); 3863cf6429aSLatchesar Ionkov if (err < 0) 3873cf6429aSLatchesar Ionkov dprintk(DEBUG_ERROR, "clunk failed: %d\n", err); 3882bad8471SEric Van Hensbergen } 3892bad8471SEric Van Hensbergen return result; 3902bad8471SEric Van Hensbergen } 3912bad8471SEric Van Hensbergen 3922bad8471SEric Van Hensbergen /** 3932bad8471SEric Van Hensbergen * v9fs_remove - helper function to remove files and directories 39473c592b9SEric Van Hensbergen * @dir: directory inode that is being deleted 39573c592b9SEric Van Hensbergen * @file: dentry that is being deleted 39673c592b9SEric Van Hensbergen * @rmdir: removing a directory 3972bad8471SEric Van Hensbergen * 3982bad8471SEric Van Hensbergen */ 3992bad8471SEric Van Hensbergen 4002bad8471SEric Van Hensbergen static int v9fs_remove(struct inode *dir, struct dentry *file, int rmdir) 4012bad8471SEric Van Hensbergen { 4022bad8471SEric Van Hensbergen struct v9fs_fcall *fcall = NULL; 4032bad8471SEric Van Hensbergen struct super_block *sb = NULL; 4042bad8471SEric Van Hensbergen struct v9fs_session_info *v9ses = NULL; 4052bad8471SEric Van Hensbergen struct v9fs_fid *v9fid = NULL; 4062bad8471SEric Van Hensbergen struct inode *file_inode = NULL; 4072bad8471SEric Van Hensbergen int fid = -1; 4082bad8471SEric Van Hensbergen int result = 0; 4092bad8471SEric Van Hensbergen 4102bad8471SEric Van Hensbergen dprintk(DEBUG_VFS, "inode: %p dentry: %p rmdir: %d\n", dir, file, 4112bad8471SEric Van Hensbergen rmdir); 4122bad8471SEric Van Hensbergen 4132bad8471SEric Van Hensbergen file_inode = file->d_inode; 4142bad8471SEric Van Hensbergen sb = file_inode->i_sb; 4152bad8471SEric Van Hensbergen v9ses = v9fs_inode2v9ses(file_inode); 4160b8dd177SLatchesar Ionkov v9fid = v9fs_fid_lookup(file); 4172bad8471SEric Van Hensbergen 4182bad8471SEric Van Hensbergen if (!v9fid) { 4192bad8471SEric Van Hensbergen dprintk(DEBUG_ERROR, 4202bad8471SEric Van Hensbergen "no v9fs_fid\n"); 4212bad8471SEric Van Hensbergen return -EBADF; 4222bad8471SEric Van Hensbergen } 4232bad8471SEric Van Hensbergen 4242bad8471SEric Van Hensbergen fid = v9fid->fid; 4252bad8471SEric Van Hensbergen if (fid < 0) { 4262bad8471SEric Van Hensbergen dprintk(DEBUG_ERROR, "inode #%lu, no fid!\n", 4272bad8471SEric Van Hensbergen file_inode->i_ino); 4282bad8471SEric Van Hensbergen return -EBADF; 4292bad8471SEric Van Hensbergen } 4302bad8471SEric Van Hensbergen 4312bad8471SEric Van Hensbergen result = v9fs_t_remove(v9ses, fid, &fcall); 432531b1094SLatchesar Ionkov if (result < 0) { 433531b1094SLatchesar Ionkov PRINT_FCALL_ERROR("remove fails", fcall); 434531b1094SLatchesar Ionkov } else { 4352bad8471SEric Van Hensbergen v9fs_put_idpool(fid, &v9ses->fidpool); 4362bad8471SEric Van Hensbergen v9fs_fid_destroy(v9fid); 4372bad8471SEric Van Hensbergen } 4382bad8471SEric Van Hensbergen 4392bad8471SEric Van Hensbergen kfree(fcall); 4402bad8471SEric Van Hensbergen return result; 4412bad8471SEric Van Hensbergen } 4422bad8471SEric Van Hensbergen 4432bad8471SEric Van Hensbergen /** 4442bad8471SEric Van Hensbergen * v9fs_vfs_create - VFS hook to create files 4452bad8471SEric Van Hensbergen * @inode: directory inode that is being deleted 4462bad8471SEric Van Hensbergen * @dentry: dentry that is being deleted 4472bad8471SEric Van Hensbergen * @perm: create permissions 4482bad8471SEric Van Hensbergen * @nd: path information 4492bad8471SEric Van Hensbergen * 4502bad8471SEric Van Hensbergen */ 4512bad8471SEric Van Hensbergen 4522bad8471SEric Van Hensbergen static int 4532bad8471SEric Van Hensbergen v9fs_vfs_create(struct inode *inode, struct dentry *dentry, int perm, 4542bad8471SEric Van Hensbergen struct nameidata *nd) 4552bad8471SEric Van Hensbergen { 4562bad8471SEric Van Hensbergen return v9fs_create(inode, dentry, perm, O_RDWR); 4572bad8471SEric Van Hensbergen } 4582bad8471SEric Van Hensbergen 4592bad8471SEric Van Hensbergen /** 4602bad8471SEric Van Hensbergen * v9fs_vfs_mkdir - VFS mkdir hook to create a directory 46173c592b9SEric Van Hensbergen * @inode: inode that is being unlinked 4622bad8471SEric Van Hensbergen * @dentry: dentry that is being unlinked 4632bad8471SEric Van Hensbergen * @mode: mode for new directory 4642bad8471SEric Van Hensbergen * 4652bad8471SEric Van Hensbergen */ 4662bad8471SEric Van Hensbergen 4672bad8471SEric Van Hensbergen static int v9fs_vfs_mkdir(struct inode *inode, struct dentry *dentry, int mode) 4682bad8471SEric Van Hensbergen { 4692bad8471SEric Van Hensbergen return v9fs_create(inode, dentry, mode | S_IFDIR, O_RDONLY); 4702bad8471SEric Van Hensbergen } 4712bad8471SEric Van Hensbergen 4722bad8471SEric Van Hensbergen /** 4732bad8471SEric Van Hensbergen * v9fs_vfs_lookup - VFS lookup hook to "walk" to a new inode 4742bad8471SEric Van Hensbergen * @dir: inode that is being walked from 4752bad8471SEric Van Hensbergen * @dentry: dentry that is being walked to? 4762bad8471SEric Van Hensbergen * @nameidata: path data 4772bad8471SEric Van Hensbergen * 4782bad8471SEric Van Hensbergen */ 4792bad8471SEric Van Hensbergen 4802bad8471SEric Van Hensbergen static struct dentry *v9fs_vfs_lookup(struct inode *dir, struct dentry *dentry, 4812bad8471SEric Van Hensbergen struct nameidata *nameidata) 4822bad8471SEric Van Hensbergen { 4832bad8471SEric Van Hensbergen struct super_block *sb; 4842bad8471SEric Van Hensbergen struct v9fs_session_info *v9ses; 4852bad8471SEric Van Hensbergen struct v9fs_fid *dirfid; 4862bad8471SEric Van Hensbergen struct v9fs_fid *fid; 4872bad8471SEric Van Hensbergen struct inode *inode; 4882bad8471SEric Van Hensbergen struct v9fs_fcall *fcall = NULL; 4892bad8471SEric Van Hensbergen int dirfidnum = -1; 4902bad8471SEric Van Hensbergen int newfid = -1; 4912bad8471SEric Van Hensbergen int result = 0; 4922bad8471SEric Van Hensbergen 4932bad8471SEric Van Hensbergen dprintk(DEBUG_VFS, "dir: %p dentry: (%s) %p nameidata: %p\n", 4942bad8471SEric Van Hensbergen dir, dentry->d_iname, dentry, nameidata); 4952bad8471SEric Van Hensbergen 4962bad8471SEric Van Hensbergen sb = dir->i_sb; 4972bad8471SEric Van Hensbergen v9ses = v9fs_inode2v9ses(dir); 4980b8dd177SLatchesar Ionkov dirfid = v9fs_fid_lookup(dentry->d_parent); 4992bad8471SEric Van Hensbergen 5002bad8471SEric Van Hensbergen if (!dirfid) { 5012bad8471SEric Van Hensbergen dprintk(DEBUG_ERROR, "no dirfid\n"); 5022bad8471SEric Van Hensbergen return ERR_PTR(-EINVAL); 5032bad8471SEric Van Hensbergen } 5042bad8471SEric Van Hensbergen 5052bad8471SEric Van Hensbergen dirfidnum = dirfid->fid; 5062bad8471SEric Van Hensbergen 5072bad8471SEric Van Hensbergen if (dirfidnum < 0) { 5082bad8471SEric Van Hensbergen dprintk(DEBUG_ERROR, "no dirfid for inode %p, #%lu\n", 5092bad8471SEric Van Hensbergen dir, dir->i_ino); 5102bad8471SEric Van Hensbergen return ERR_PTR(-EBADF); 5112bad8471SEric Van Hensbergen } 5122bad8471SEric Van Hensbergen 5132bad8471SEric Van Hensbergen newfid = v9fs_get_idpool(&v9ses->fidpool); 5142bad8471SEric Van Hensbergen if (newfid < 0) { 5152bad8471SEric Van Hensbergen eprintk(KERN_WARNING, "newfid fails!\n"); 5162bad8471SEric Van Hensbergen return ERR_PTR(-ENOSPC); 5172bad8471SEric Van Hensbergen } 5182bad8471SEric Van Hensbergen 5192bad8471SEric Van Hensbergen result = 5202bad8471SEric Van Hensbergen v9fs_t_walk(v9ses, dirfidnum, newfid, (char *)dentry->d_name.name, 5212bad8471SEric Van Hensbergen NULL); 5222bad8471SEric Van Hensbergen if (result < 0) { 5232bad8471SEric Van Hensbergen v9fs_put_idpool(newfid, &v9ses->fidpool); 5242bad8471SEric Van Hensbergen if (result == -ENOENT) { 5252bad8471SEric Van Hensbergen d_add(dentry, NULL); 5260b8dd177SLatchesar Ionkov dprintk(DEBUG_VFS, 5272bad8471SEric Van Hensbergen "Return negative dentry %p count %d\n", 5282bad8471SEric Van Hensbergen dentry, atomic_read(&dentry->d_count)); 5292bad8471SEric Van Hensbergen return NULL; 5302bad8471SEric Van Hensbergen } 5312bad8471SEric Van Hensbergen dprintk(DEBUG_ERROR, "walk error:%d\n", result); 5322bad8471SEric Van Hensbergen goto FreeFcall; 5332bad8471SEric Van Hensbergen } 5342bad8471SEric Van Hensbergen 5352bad8471SEric Van Hensbergen result = v9fs_t_stat(v9ses, newfid, &fcall); 5362bad8471SEric Van Hensbergen if (result < 0) { 5372bad8471SEric Van Hensbergen dprintk(DEBUG_ERROR, "stat error\n"); 5382bad8471SEric Van Hensbergen goto FreeFcall; 5392bad8471SEric Van Hensbergen } 5402bad8471SEric Van Hensbergen 541531b1094SLatchesar Ionkov inode = v9fs_get_inode(sb, p9mode2unixmode(v9ses, 542531b1094SLatchesar Ionkov fcall->params.rstat.stat.mode)); 5432bad8471SEric Van Hensbergen 5442bad8471SEric Van Hensbergen if (IS_ERR(inode) && (PTR_ERR(inode) == -ENOSPC)) { 5452bad8471SEric Van Hensbergen eprintk(KERN_WARNING, "inode alloc failes, returns %ld\n", 5462bad8471SEric Van Hensbergen PTR_ERR(inode)); 5472bad8471SEric Van Hensbergen 5482bad8471SEric Van Hensbergen result = -ENOSPC; 5492bad8471SEric Van Hensbergen goto FreeFcall; 5502bad8471SEric Van Hensbergen } 5512bad8471SEric Van Hensbergen 552531b1094SLatchesar Ionkov inode->i_ino = v9fs_qid2ino(&fcall->params.rstat.stat.qid); 5532bad8471SEric Van Hensbergen 5540b8dd177SLatchesar Ionkov fid = v9fs_fid_create(dentry, v9ses, newfid, 0); 5552bad8471SEric Van Hensbergen if (fid == NULL) { 5562bad8471SEric Van Hensbergen dprintk(DEBUG_ERROR, "couldn't insert\n"); 5572bad8471SEric Van Hensbergen result = -ENOMEM; 5582bad8471SEric Van Hensbergen goto FreeFcall; 5592bad8471SEric Van Hensbergen } 5602bad8471SEric Van Hensbergen 561531b1094SLatchesar Ionkov fid->qid = fcall->params.rstat.stat.qid; 5622bad8471SEric Van Hensbergen 5632bad8471SEric Van Hensbergen dentry->d_op = &v9fs_dentry_operations; 564531b1094SLatchesar Ionkov v9fs_stat2inode(&fcall->params.rstat.stat, inode, inode->i_sb); 5652bad8471SEric Van Hensbergen 5662bad8471SEric Van Hensbergen d_add(dentry, inode); 5672bad8471SEric Van Hensbergen kfree(fcall); 5682bad8471SEric Van Hensbergen 5692bad8471SEric Van Hensbergen return NULL; 5702bad8471SEric Van Hensbergen 5712bad8471SEric Van Hensbergen FreeFcall: 5722bad8471SEric Van Hensbergen kfree(fcall); 5732bad8471SEric Van Hensbergen return ERR_PTR(result); 5742bad8471SEric Van Hensbergen } 5752bad8471SEric Van Hensbergen 5762bad8471SEric Van Hensbergen /** 5772bad8471SEric Van Hensbergen * v9fs_vfs_unlink - VFS unlink hook to delete an inode 5782bad8471SEric Van Hensbergen * @i: inode that is being unlinked 57973c592b9SEric Van Hensbergen * @d: dentry that is being unlinked 5802bad8471SEric Van Hensbergen * 5812bad8471SEric Van Hensbergen */ 5822bad8471SEric Van Hensbergen 5832bad8471SEric Van Hensbergen static int v9fs_vfs_unlink(struct inode *i, struct dentry *d) 5842bad8471SEric Van Hensbergen { 5852bad8471SEric Van Hensbergen return v9fs_remove(i, d, 0); 5862bad8471SEric Van Hensbergen } 5872bad8471SEric Van Hensbergen 5882bad8471SEric Van Hensbergen /** 5892bad8471SEric Van Hensbergen * v9fs_vfs_rmdir - VFS unlink hook to delete a directory 5902bad8471SEric Van Hensbergen * @i: inode that is being unlinked 59173c592b9SEric Van Hensbergen * @d: dentry that is being unlinked 5922bad8471SEric Van Hensbergen * 5932bad8471SEric Van Hensbergen */ 5942bad8471SEric Van Hensbergen 5952bad8471SEric Van Hensbergen static int v9fs_vfs_rmdir(struct inode *i, struct dentry *d) 5962bad8471SEric Van Hensbergen { 5972bad8471SEric Van Hensbergen return v9fs_remove(i, d, 1); 5982bad8471SEric Van Hensbergen } 5992bad8471SEric Van Hensbergen 6002bad8471SEric Van Hensbergen /** 6012bad8471SEric Van Hensbergen * v9fs_vfs_rename - VFS hook to rename an inode 6022bad8471SEric Van Hensbergen * @old_dir: old dir inode 6032bad8471SEric Van Hensbergen * @old_dentry: old dentry 6042bad8471SEric Van Hensbergen * @new_dir: new dir inode 6052bad8471SEric Van Hensbergen * @new_dentry: new dentry 6062bad8471SEric Van Hensbergen * 6072bad8471SEric Van Hensbergen */ 6082bad8471SEric Van Hensbergen 6092bad8471SEric Van Hensbergen static int 6102bad8471SEric Van Hensbergen v9fs_vfs_rename(struct inode *old_dir, struct dentry *old_dentry, 6112bad8471SEric Van Hensbergen struct inode *new_dir, struct dentry *new_dentry) 6122bad8471SEric Van Hensbergen { 6132bad8471SEric Van Hensbergen struct inode *old_inode = old_dentry->d_inode; 6142bad8471SEric Van Hensbergen struct v9fs_session_info *v9ses = v9fs_inode2v9ses(old_inode); 6150b8dd177SLatchesar Ionkov struct v9fs_fid *oldfid = v9fs_fid_lookup(old_dentry); 6162bad8471SEric Van Hensbergen struct v9fs_fid *olddirfid = 6170b8dd177SLatchesar Ionkov v9fs_fid_lookup(old_dentry->d_parent); 6182bad8471SEric Van Hensbergen struct v9fs_fid *newdirfid = 6190b8dd177SLatchesar Ionkov v9fs_fid_lookup(new_dentry->d_parent); 620531b1094SLatchesar Ionkov struct v9fs_wstat wstat; 6212bad8471SEric Van Hensbergen struct v9fs_fcall *fcall = NULL; 6222bad8471SEric Van Hensbergen int fid = -1; 6232bad8471SEric Van Hensbergen int olddirfidnum = -1; 6242bad8471SEric Van Hensbergen int newdirfidnum = -1; 6252bad8471SEric Van Hensbergen int retval = 0; 6262bad8471SEric Van Hensbergen 6272bad8471SEric Van Hensbergen dprintk(DEBUG_VFS, "\n"); 6282bad8471SEric Van Hensbergen 6292bad8471SEric Van Hensbergen if ((!oldfid) || (!olddirfid) || (!newdirfid)) { 6302bad8471SEric Van Hensbergen dprintk(DEBUG_ERROR, "problem with arguments\n"); 6312bad8471SEric Van Hensbergen return -EBADF; 6322bad8471SEric Van Hensbergen } 6332bad8471SEric Van Hensbergen 6342bad8471SEric Van Hensbergen /* 9P can only handle file rename in the same directory */ 6352bad8471SEric Van Hensbergen if (memcmp(&olddirfid->qid, &newdirfid->qid, sizeof(newdirfid->qid))) { 6362bad8471SEric Van Hensbergen dprintk(DEBUG_ERROR, "old dir and new dir are different\n"); 6372bad8471SEric Van Hensbergen retval = -EPERM; 6382bad8471SEric Van Hensbergen goto FreeFcallnBail; 6392bad8471SEric Van Hensbergen } 6402bad8471SEric Van Hensbergen 6412bad8471SEric Van Hensbergen fid = oldfid->fid; 6422bad8471SEric Van Hensbergen olddirfidnum = olddirfid->fid; 6432bad8471SEric Van Hensbergen newdirfidnum = newdirfid->fid; 6442bad8471SEric Van Hensbergen 6452bad8471SEric Van Hensbergen if (fid < 0) { 6462bad8471SEric Van Hensbergen dprintk(DEBUG_ERROR, "no fid for old file #%lu\n", 6472bad8471SEric Van Hensbergen old_inode->i_ino); 6482bad8471SEric Van Hensbergen retval = -EBADF; 6492bad8471SEric Van Hensbergen goto FreeFcallnBail; 6502bad8471SEric Van Hensbergen } 6512bad8471SEric Van Hensbergen 652531b1094SLatchesar Ionkov v9fs_blank_wstat(&wstat); 653531b1094SLatchesar Ionkov wstat.muid = v9ses->name; 654531b1094SLatchesar Ionkov wstat.name = (char *) new_dentry->d_name.name; 6552bad8471SEric Van Hensbergen 656531b1094SLatchesar Ionkov retval = v9fs_t_wstat(v9ses, fid, &wstat, &fcall); 6572bad8471SEric Van Hensbergen 6582bad8471SEric Van Hensbergen FreeFcallnBail: 6592bad8471SEric Van Hensbergen if (retval < 0) 660531b1094SLatchesar Ionkov PRINT_FCALL_ERROR("wstat error", fcall); 6612bad8471SEric Van Hensbergen 6622bad8471SEric Van Hensbergen kfree(fcall); 6632bad8471SEric Van Hensbergen return retval; 6642bad8471SEric Van Hensbergen } 6652bad8471SEric Van Hensbergen 6662bad8471SEric Van Hensbergen /** 667943ffb58SAdrian Bunk * v9fs_vfs_getattr - retrieve file metadata 6682bad8471SEric Van Hensbergen * @mnt - mount information 6692bad8471SEric Van Hensbergen * @dentry - file to get attributes on 6702bad8471SEric Van Hensbergen * @stat - metadata structure to populate 6712bad8471SEric Van Hensbergen * 6722bad8471SEric Van Hensbergen */ 6732bad8471SEric Van Hensbergen 6742bad8471SEric Van Hensbergen static int 6752bad8471SEric Van Hensbergen v9fs_vfs_getattr(struct vfsmount *mnt, struct dentry *dentry, 6762bad8471SEric Van Hensbergen struct kstat *stat) 6772bad8471SEric Van Hensbergen { 6782bad8471SEric Van Hensbergen struct v9fs_fcall *fcall = NULL; 6792bad8471SEric Van Hensbergen struct v9fs_session_info *v9ses = v9fs_inode2v9ses(dentry->d_inode); 6800b8dd177SLatchesar Ionkov struct v9fs_fid *fid = v9fs_fid_lookup(dentry); 6812bad8471SEric Van Hensbergen int err = -EPERM; 6822bad8471SEric Van Hensbergen 6832bad8471SEric Van Hensbergen dprintk(DEBUG_VFS, "dentry: %p\n", dentry); 6842bad8471SEric Van Hensbergen if (!fid) { 6852bad8471SEric Van Hensbergen dprintk(DEBUG_ERROR, 6862bad8471SEric Van Hensbergen "couldn't find fid associated with dentry\n"); 6872bad8471SEric Van Hensbergen return -EBADF; 6882bad8471SEric Van Hensbergen } 6892bad8471SEric Van Hensbergen 6902bad8471SEric Van Hensbergen err = v9fs_t_stat(v9ses, fid->fid, &fcall); 6912bad8471SEric Van Hensbergen 6922bad8471SEric Van Hensbergen if (err < 0) 6932bad8471SEric Van Hensbergen dprintk(DEBUG_ERROR, "stat error\n"); 6942bad8471SEric Van Hensbergen else { 695531b1094SLatchesar Ionkov v9fs_stat2inode(&fcall->params.rstat.stat, dentry->d_inode, 6962bad8471SEric Van Hensbergen dentry->d_inode->i_sb); 6972bad8471SEric Van Hensbergen generic_fillattr(dentry->d_inode, stat); 6982bad8471SEric Van Hensbergen } 6992bad8471SEric Van Hensbergen 7002bad8471SEric Van Hensbergen kfree(fcall); 7012bad8471SEric Van Hensbergen return err; 7022bad8471SEric Van Hensbergen } 7032bad8471SEric Van Hensbergen 7042bad8471SEric Van Hensbergen /** 7052bad8471SEric Van Hensbergen * v9fs_vfs_setattr - set file metadata 7062bad8471SEric Van Hensbergen * @dentry: file whose metadata to set 7072bad8471SEric Van Hensbergen * @iattr: metadata assignment structure 7082bad8471SEric Van Hensbergen * 7092bad8471SEric Van Hensbergen */ 7102bad8471SEric Van Hensbergen 7112bad8471SEric Van Hensbergen static int v9fs_vfs_setattr(struct dentry *dentry, struct iattr *iattr) 7122bad8471SEric Van Hensbergen { 7132bad8471SEric Van Hensbergen struct v9fs_session_info *v9ses = v9fs_inode2v9ses(dentry->d_inode); 7140b8dd177SLatchesar Ionkov struct v9fs_fid *fid = v9fs_fid_lookup(dentry); 7152bad8471SEric Van Hensbergen struct v9fs_fcall *fcall = NULL; 716531b1094SLatchesar Ionkov struct v9fs_wstat wstat; 7172bad8471SEric Van Hensbergen int res = -EPERM; 7182bad8471SEric Van Hensbergen 7192bad8471SEric Van Hensbergen dprintk(DEBUG_VFS, "\n"); 72073c592b9SEric Van Hensbergen 7212bad8471SEric Van Hensbergen if (!fid) { 7222bad8471SEric Van Hensbergen dprintk(DEBUG_ERROR, 7232bad8471SEric Van Hensbergen "Couldn't find fid associated with dentry\n"); 7242bad8471SEric Van Hensbergen return -EBADF; 7252bad8471SEric Van Hensbergen } 7262bad8471SEric Van Hensbergen 727531b1094SLatchesar Ionkov v9fs_blank_wstat(&wstat); 7282bad8471SEric Van Hensbergen if (iattr->ia_valid & ATTR_MODE) 729531b1094SLatchesar Ionkov wstat.mode = unixmode2p9mode(v9ses, iattr->ia_mode); 7302bad8471SEric Van Hensbergen 7312bad8471SEric Van Hensbergen if (iattr->ia_valid & ATTR_MTIME) 732531b1094SLatchesar Ionkov wstat.mtime = iattr->ia_mtime.tv_sec; 7332bad8471SEric Van Hensbergen 7342bad8471SEric Van Hensbergen if (iattr->ia_valid & ATTR_ATIME) 735531b1094SLatchesar Ionkov wstat.atime = iattr->ia_atime.tv_sec; 7362bad8471SEric Van Hensbergen 7372bad8471SEric Van Hensbergen if (iattr->ia_valid & ATTR_SIZE) 738531b1094SLatchesar Ionkov wstat.length = iattr->ia_size; 7392bad8471SEric Van Hensbergen 7402bad8471SEric Van Hensbergen if (v9ses->extended) { 741531b1094SLatchesar Ionkov if (iattr->ia_valid & ATTR_UID) 742531b1094SLatchesar Ionkov wstat.n_uid = iattr->ia_uid; 7432bad8471SEric Van Hensbergen 744531b1094SLatchesar Ionkov if (iattr->ia_valid & ATTR_GID) 745531b1094SLatchesar Ionkov wstat.n_gid = iattr->ia_gid; 7462bad8471SEric Van Hensbergen } 7472bad8471SEric Van Hensbergen 748531b1094SLatchesar Ionkov res = v9fs_t_wstat(v9ses, fid->fid, &wstat, &fcall); 7492bad8471SEric Van Hensbergen 7502bad8471SEric Van Hensbergen if (res < 0) 751531b1094SLatchesar Ionkov PRINT_FCALL_ERROR("wstat error", fcall); 7522bad8471SEric Van Hensbergen 7532bad8471SEric Van Hensbergen kfree(fcall); 7542bad8471SEric Van Hensbergen if (res >= 0) 7552bad8471SEric Van Hensbergen res = inode_setattr(dentry->d_inode, iattr); 7562bad8471SEric Van Hensbergen 7572bad8471SEric Van Hensbergen return res; 7582bad8471SEric Van Hensbergen } 7592bad8471SEric Van Hensbergen 7602bad8471SEric Van Hensbergen /** 761531b1094SLatchesar Ionkov * v9fs_stat2inode - populate an inode structure with mistat info 762531b1094SLatchesar Ionkov * @stat: Plan 9 metadata (mistat) structure 7632bad8471SEric Van Hensbergen * @inode: inode to populate 7642bad8471SEric Van Hensbergen * @sb: superblock of filesystem 7652bad8471SEric Van Hensbergen * 7662bad8471SEric Van Hensbergen */ 7672bad8471SEric Van Hensbergen 7682bad8471SEric Van Hensbergen void 769531b1094SLatchesar Ionkov v9fs_stat2inode(struct v9fs_stat *stat, struct inode *inode, 7702bad8471SEric Van Hensbergen struct super_block *sb) 7712bad8471SEric Van Hensbergen { 7721dac06b2SLatchesar Ionkov int n; 773531b1094SLatchesar Ionkov char ext[32]; 7742bad8471SEric Van Hensbergen struct v9fs_session_info *v9ses = sb->s_fs_info; 7752bad8471SEric Van Hensbergen 7762bad8471SEric Van Hensbergen inode->i_nlink = 1; 7772bad8471SEric Van Hensbergen 778531b1094SLatchesar Ionkov inode->i_atime.tv_sec = stat->atime; 779531b1094SLatchesar Ionkov inode->i_mtime.tv_sec = stat->mtime; 780531b1094SLatchesar Ionkov inode->i_ctime.tv_sec = stat->mtime; 7812bad8471SEric Van Hensbergen 7822bad8471SEric Van Hensbergen inode->i_uid = v9ses->uid; 7832bad8471SEric Van Hensbergen inode->i_gid = v9ses->gid; 7842bad8471SEric Van Hensbergen 785531b1094SLatchesar Ionkov if (v9ses->extended) { 786531b1094SLatchesar Ionkov inode->i_uid = stat->n_uid; 787531b1094SLatchesar Ionkov inode->i_gid = stat->n_gid; 788531b1094SLatchesar Ionkov } 789531b1094SLatchesar Ionkov 790531b1094SLatchesar Ionkov inode->i_mode = p9mode2unixmode(v9ses, stat->mode); 7912bad8471SEric Van Hensbergen if ((S_ISBLK(inode->i_mode)) || (S_ISCHR(inode->i_mode))) { 7922bad8471SEric Van Hensbergen char type = 0; 7932bad8471SEric Van Hensbergen int major = -1; 7942bad8471SEric Van Hensbergen int minor = -1; 795531b1094SLatchesar Ionkov 7961dac06b2SLatchesar Ionkov n = stat->extension.len; 7971dac06b2SLatchesar Ionkov if (n > sizeof(ext)-1) 7981dac06b2SLatchesar Ionkov n = sizeof(ext)-1; 7991dac06b2SLatchesar Ionkov memmove(ext, stat->extension.str, n); 8001dac06b2SLatchesar Ionkov ext[n] = 0; 801531b1094SLatchesar Ionkov sscanf(ext, "%c %u %u", &type, &major, &minor); 8022bad8471SEric Van Hensbergen switch (type) { 8032bad8471SEric Van Hensbergen case 'c': 8042bad8471SEric Van Hensbergen inode->i_mode &= ~S_IFBLK; 8052bad8471SEric Van Hensbergen inode->i_mode |= S_IFCHR; 8062bad8471SEric Van Hensbergen break; 8072bad8471SEric Van Hensbergen case 'b': 8082bad8471SEric Van Hensbergen break; 8092bad8471SEric Van Hensbergen default: 810531b1094SLatchesar Ionkov dprintk(DEBUG_ERROR, "Unknown special type %c (%.*s)\n", 811531b1094SLatchesar Ionkov type, stat->extension.len, stat->extension.str); 8122bad8471SEric Van Hensbergen }; 8132bad8471SEric Van Hensbergen inode->i_rdev = MKDEV(major, minor); 8142bad8471SEric Van Hensbergen } else 8152bad8471SEric Van Hensbergen inode->i_rdev = 0; 8162bad8471SEric Van Hensbergen 817531b1094SLatchesar Ionkov inode->i_size = stat->length; 8182bad8471SEric Van Hensbergen 8192bad8471SEric Van Hensbergen inode->i_blksize = sb->s_blocksize; 8202bad8471SEric Van Hensbergen inode->i_blocks = 8212bad8471SEric Van Hensbergen (inode->i_size + inode->i_blksize - 1) >> sb->s_blocksize_bits; 8222bad8471SEric Van Hensbergen } 8232bad8471SEric Van Hensbergen 8242bad8471SEric Van Hensbergen /** 8252bad8471SEric Van Hensbergen * v9fs_qid2ino - convert qid into inode number 8262bad8471SEric Van Hensbergen * @qid: qid to hash 8272bad8471SEric Van Hensbergen * 8282bad8471SEric Van Hensbergen * BUG: potential for inode number collisions? 8292bad8471SEric Van Hensbergen */ 8302bad8471SEric Van Hensbergen 8312bad8471SEric Van Hensbergen ino_t v9fs_qid2ino(struct v9fs_qid *qid) 8322bad8471SEric Van Hensbergen { 8332bad8471SEric Van Hensbergen u64 path = qid->path + 2; 8342bad8471SEric Van Hensbergen ino_t i = 0; 8352bad8471SEric Van Hensbergen 8362bad8471SEric Van Hensbergen if (sizeof(ino_t) == sizeof(path)) 8372bad8471SEric Van Hensbergen memcpy(&i, &path, sizeof(ino_t)); 8382bad8471SEric Van Hensbergen else 8392bad8471SEric Van Hensbergen i = (ino_t) (path ^ (path >> 32)); 8402bad8471SEric Van Hensbergen 8412bad8471SEric Van Hensbergen return i; 8422bad8471SEric Van Hensbergen } 8432bad8471SEric Van Hensbergen 8442bad8471SEric Van Hensbergen /** 8452bad8471SEric Van Hensbergen * v9fs_readlink - read a symlink's location (internal version) 8462bad8471SEric Van Hensbergen * @dentry: dentry for symlink 84773c592b9SEric Van Hensbergen * @buffer: buffer to load symlink location into 8482bad8471SEric Van Hensbergen * @buflen: length of buffer 8492bad8471SEric Van Hensbergen * 8502bad8471SEric Van Hensbergen */ 8512bad8471SEric Van Hensbergen 8522bad8471SEric Van Hensbergen static int v9fs_readlink(struct dentry *dentry, char *buffer, int buflen) 8532bad8471SEric Van Hensbergen { 8542bad8471SEric Van Hensbergen int retval = -EPERM; 8552bad8471SEric Van Hensbergen 8562bad8471SEric Van Hensbergen struct v9fs_fcall *fcall = NULL; 8572bad8471SEric Van Hensbergen struct v9fs_session_info *v9ses = v9fs_inode2v9ses(dentry->d_inode); 8580b8dd177SLatchesar Ionkov struct v9fs_fid *fid = v9fs_fid_lookup(dentry); 8592bad8471SEric Van Hensbergen 8602bad8471SEric Van Hensbergen if (!fid) { 8612bad8471SEric Van Hensbergen dprintk(DEBUG_ERROR, "could not resolve fid from dentry\n"); 8622bad8471SEric Van Hensbergen retval = -EBADF; 8632bad8471SEric Van Hensbergen goto FreeFcall; 8642bad8471SEric Van Hensbergen } 8652bad8471SEric Van Hensbergen 8662bad8471SEric Van Hensbergen if (!v9ses->extended) { 8672bad8471SEric Van Hensbergen retval = -EBADF; 8682bad8471SEric Van Hensbergen dprintk(DEBUG_ERROR, "not extended\n"); 8692bad8471SEric Van Hensbergen goto FreeFcall; 8702bad8471SEric Van Hensbergen } 8712bad8471SEric Van Hensbergen 8722bad8471SEric Van Hensbergen dprintk(DEBUG_VFS, " %s\n", dentry->d_name.name); 8732bad8471SEric Van Hensbergen retval = v9fs_t_stat(v9ses, fid->fid, &fcall); 8742bad8471SEric Van Hensbergen 8752bad8471SEric Van Hensbergen if (retval < 0) { 8762bad8471SEric Van Hensbergen dprintk(DEBUG_ERROR, "stat error\n"); 8772bad8471SEric Van Hensbergen goto FreeFcall; 8782bad8471SEric Van Hensbergen } 8792bad8471SEric Van Hensbergen 8802bad8471SEric Van Hensbergen if (!fcall) 8812bad8471SEric Van Hensbergen return -EIO; 8822bad8471SEric Van Hensbergen 883531b1094SLatchesar Ionkov if (!(fcall->params.rstat.stat.mode & V9FS_DMSYMLINK)) { 8842bad8471SEric Van Hensbergen retval = -EINVAL; 8852bad8471SEric Van Hensbergen goto FreeFcall; 8862bad8471SEric Van Hensbergen } 8872bad8471SEric Van Hensbergen 8882bad8471SEric Van Hensbergen /* copy extension buffer into buffer */ 889531b1094SLatchesar Ionkov if (fcall->params.rstat.stat.extension.len < buflen) 890531b1094SLatchesar Ionkov buflen = fcall->params.rstat.stat.extension.len; 8912bad8471SEric Van Hensbergen 892531b1094SLatchesar Ionkov memcpy(buffer, fcall->params.rstat.stat.extension.str, buflen - 1); 893531b1094SLatchesar Ionkov buffer[buflen-1] = 0; 8942bad8471SEric Van Hensbergen 8952bad8471SEric Van Hensbergen retval = buflen; 8962bad8471SEric Van Hensbergen 8972bad8471SEric Van Hensbergen FreeFcall: 8982bad8471SEric Van Hensbergen kfree(fcall); 8992bad8471SEric Van Hensbergen 9002bad8471SEric Van Hensbergen return retval; 9012bad8471SEric Van Hensbergen } 9022bad8471SEric Van Hensbergen 9032bad8471SEric Van Hensbergen /** 9042bad8471SEric Van Hensbergen * v9fs_vfs_readlink - read a symlink's location 9052bad8471SEric Van Hensbergen * @dentry: dentry for symlink 9062bad8471SEric Van Hensbergen * @buf: buffer to load symlink location into 9072bad8471SEric Van Hensbergen * @buflen: length of buffer 9082bad8471SEric Van Hensbergen * 9092bad8471SEric Van Hensbergen */ 9102bad8471SEric Van Hensbergen 9112bad8471SEric Van Hensbergen static int v9fs_vfs_readlink(struct dentry *dentry, char __user * buffer, 9122bad8471SEric Van Hensbergen int buflen) 9132bad8471SEric Van Hensbergen { 9142bad8471SEric Van Hensbergen int retval; 9152bad8471SEric Van Hensbergen int ret; 9162bad8471SEric Van Hensbergen char *link = __getname(); 9172bad8471SEric Van Hensbergen 918a1f9d8d2SLatchesar Ionkov if (buflen > PATH_MAX) 919a1f9d8d2SLatchesar Ionkov buflen = PATH_MAX; 9202bad8471SEric Van Hensbergen 9212bad8471SEric Van Hensbergen dprintk(DEBUG_VFS, " dentry: %s (%p)\n", dentry->d_iname, dentry); 9222bad8471SEric Van Hensbergen 9232bad8471SEric Van Hensbergen retval = v9fs_readlink(dentry, link, buflen); 9242bad8471SEric Van Hensbergen 9252bad8471SEric Van Hensbergen if (retval > 0) { 9262bad8471SEric Van Hensbergen if ((ret = copy_to_user(buffer, link, retval)) != 0) { 9272bad8471SEric Van Hensbergen dprintk(DEBUG_ERROR, "problem copying to user: %d\n", 9282bad8471SEric Van Hensbergen ret); 9292bad8471SEric Van Hensbergen retval = ret; 9302bad8471SEric Van Hensbergen } 9312bad8471SEric Van Hensbergen } 9322bad8471SEric Van Hensbergen 933ce44eeb6SDavi Arnaut __putname(link); 9342bad8471SEric Van Hensbergen return retval; 9352bad8471SEric Van Hensbergen } 9362bad8471SEric Van Hensbergen 9372bad8471SEric Van Hensbergen /** 9382bad8471SEric Van Hensbergen * v9fs_vfs_follow_link - follow a symlink path 9392bad8471SEric Van Hensbergen * @dentry: dentry for symlink 9402bad8471SEric Van Hensbergen * @nd: nameidata 9412bad8471SEric Van Hensbergen * 9422bad8471SEric Van Hensbergen */ 9432bad8471SEric Van Hensbergen 9442bad8471SEric Van Hensbergen static void *v9fs_vfs_follow_link(struct dentry *dentry, struct nameidata *nd) 9452bad8471SEric Van Hensbergen { 9462bad8471SEric Van Hensbergen int len = 0; 9472bad8471SEric Van Hensbergen char *link = __getname(); 9482bad8471SEric Van Hensbergen 9492bad8471SEric Van Hensbergen dprintk(DEBUG_VFS, "%s n", dentry->d_name.name); 9502bad8471SEric Van Hensbergen 9512bad8471SEric Van Hensbergen if (!link) 9522bad8471SEric Van Hensbergen link = ERR_PTR(-ENOMEM); 9532bad8471SEric Van Hensbergen else { 9542bad8471SEric Van Hensbergen len = v9fs_readlink(dentry, link, strlen(link)); 9552bad8471SEric Van Hensbergen 9562bad8471SEric Van Hensbergen if (len < 0) { 957ce44eeb6SDavi Arnaut __putname(link); 9582bad8471SEric Van Hensbergen link = ERR_PTR(len); 9592bad8471SEric Van Hensbergen } else 9602bad8471SEric Van Hensbergen link[len] = 0; 9612bad8471SEric Van Hensbergen } 9622bad8471SEric Van Hensbergen nd_set_link(nd, link); 9632bad8471SEric Van Hensbergen 9642bad8471SEric Van Hensbergen return NULL; 9652bad8471SEric Van Hensbergen } 9662bad8471SEric Van Hensbergen 9672bad8471SEric Van Hensbergen /** 9682bad8471SEric Van Hensbergen * v9fs_vfs_put_link - release a symlink path 9692bad8471SEric Van Hensbergen * @dentry: dentry for symlink 9702bad8471SEric Van Hensbergen * @nd: nameidata 9712bad8471SEric Van Hensbergen * 9722bad8471SEric Van Hensbergen */ 9732bad8471SEric Van Hensbergen 9742bad8471SEric Van Hensbergen static void v9fs_vfs_put_link(struct dentry *dentry, struct nameidata *nd, void *p) 9752bad8471SEric Van Hensbergen { 9762bad8471SEric Van Hensbergen char *s = nd_get_link(nd); 9772bad8471SEric Van Hensbergen 9782bad8471SEric Van Hensbergen dprintk(DEBUG_VFS, " %s %s\n", dentry->d_name.name, s); 9792bad8471SEric Van Hensbergen if (!IS_ERR(s)) 980ce44eeb6SDavi Arnaut __putname(s); 9812bad8471SEric Van Hensbergen } 9822bad8471SEric Van Hensbergen 983531b1094SLatchesar Ionkov static int v9fs_vfs_mkspecial(struct inode *dir, struct dentry *dentry, 984531b1094SLatchesar Ionkov int mode, const char *extension) 985531b1094SLatchesar Ionkov { 986531b1094SLatchesar Ionkov int err, retval; 987531b1094SLatchesar Ionkov struct v9fs_session_info *v9ses; 988531b1094SLatchesar Ionkov struct v9fs_fcall *fcall; 989531b1094SLatchesar Ionkov struct v9fs_fid *fid; 990531b1094SLatchesar Ionkov struct v9fs_wstat wstat; 991531b1094SLatchesar Ionkov 992531b1094SLatchesar Ionkov v9ses = v9fs_inode2v9ses(dir); 993531b1094SLatchesar Ionkov retval = -EPERM; 994531b1094SLatchesar Ionkov fcall = NULL; 995531b1094SLatchesar Ionkov 996531b1094SLatchesar Ionkov if (!v9ses->extended) { 997531b1094SLatchesar Ionkov dprintk(DEBUG_ERROR, "not extended\n"); 998531b1094SLatchesar Ionkov goto free_mem; 999531b1094SLatchesar Ionkov } 1000531b1094SLatchesar Ionkov 1001531b1094SLatchesar Ionkov /* issue a create */ 1002531b1094SLatchesar Ionkov retval = v9fs_create(dir, dentry, mode, 0); 1003531b1094SLatchesar Ionkov if (retval != 0) 1004531b1094SLatchesar Ionkov goto free_mem; 1005531b1094SLatchesar Ionkov 1006531b1094SLatchesar Ionkov fid = v9fs_fid_get_created(dentry); 1007531b1094SLatchesar Ionkov if (!fid) { 1008531b1094SLatchesar Ionkov dprintk(DEBUG_ERROR, "couldn't resolve fid from dentry\n"); 1009531b1094SLatchesar Ionkov goto free_mem; 1010531b1094SLatchesar Ionkov } 1011531b1094SLatchesar Ionkov 1012531b1094SLatchesar Ionkov /* issue a Twstat */ 1013531b1094SLatchesar Ionkov v9fs_blank_wstat(&wstat); 1014531b1094SLatchesar Ionkov wstat.muid = v9ses->name; 1015531b1094SLatchesar Ionkov wstat.extension = (char *) extension; 1016531b1094SLatchesar Ionkov retval = v9fs_t_wstat(v9ses, fid->fid, &wstat, &fcall); 1017531b1094SLatchesar Ionkov if (retval < 0) { 1018531b1094SLatchesar Ionkov PRINT_FCALL_ERROR("wstat error", fcall); 1019531b1094SLatchesar Ionkov goto free_mem; 1020531b1094SLatchesar Ionkov } 1021531b1094SLatchesar Ionkov 1022531b1094SLatchesar Ionkov err = v9fs_t_clunk(v9ses, fid->fid); 1023531b1094SLatchesar Ionkov if (err < 0) { 1024531b1094SLatchesar Ionkov dprintk(DEBUG_ERROR, "clunk failed: %d\n", err); 1025531b1094SLatchesar Ionkov goto free_mem; 1026531b1094SLatchesar Ionkov } 1027531b1094SLatchesar Ionkov 1028531b1094SLatchesar Ionkov d_drop(dentry); /* FID - will this also clunk? */ 1029531b1094SLatchesar Ionkov 1030531b1094SLatchesar Ionkov free_mem: 1031531b1094SLatchesar Ionkov kfree(fcall); 1032531b1094SLatchesar Ionkov return retval; 1033531b1094SLatchesar Ionkov } 1034531b1094SLatchesar Ionkov 1035531b1094SLatchesar Ionkov /** 1036531b1094SLatchesar Ionkov * v9fs_vfs_symlink - helper function to create symlinks 1037531b1094SLatchesar Ionkov * @dir: directory inode containing symlink 1038531b1094SLatchesar Ionkov * @dentry: dentry for symlink 1039531b1094SLatchesar Ionkov * @symname: symlink data 1040531b1094SLatchesar Ionkov * 1041531b1094SLatchesar Ionkov * See 9P2000.u RFC for more information 1042531b1094SLatchesar Ionkov * 1043531b1094SLatchesar Ionkov */ 1044531b1094SLatchesar Ionkov 1045531b1094SLatchesar Ionkov static int 1046531b1094SLatchesar Ionkov v9fs_vfs_symlink(struct inode *dir, struct dentry *dentry, const char *symname) 1047531b1094SLatchesar Ionkov { 1048531b1094SLatchesar Ionkov dprintk(DEBUG_VFS, " %lu,%s,%s\n", dir->i_ino, dentry->d_name.name, 1049531b1094SLatchesar Ionkov symname); 1050531b1094SLatchesar Ionkov 1051531b1094SLatchesar Ionkov return v9fs_vfs_mkspecial(dir, dentry, S_IFLNK, symname); 1052531b1094SLatchesar Ionkov } 1053531b1094SLatchesar Ionkov 10542bad8471SEric Van Hensbergen /** 10552bad8471SEric Van Hensbergen * v9fs_vfs_link - create a hardlink 10562bad8471SEric Van Hensbergen * @old_dentry: dentry for file to link to 10572bad8471SEric Van Hensbergen * @dir: inode destination for new link 105873c592b9SEric Van Hensbergen * @dentry: dentry for link 10592bad8471SEric Van Hensbergen * 10602bad8471SEric Van Hensbergen */ 10612bad8471SEric Van Hensbergen 10622bad8471SEric Van Hensbergen /* XXX - lots of code dup'd from symlink and creates, 10632bad8471SEric Van Hensbergen * figure out a better reuse strategy 10642bad8471SEric Van Hensbergen */ 10652bad8471SEric Van Hensbergen 10662bad8471SEric Van Hensbergen static int 10672bad8471SEric Van Hensbergen v9fs_vfs_link(struct dentry *old_dentry, struct inode *dir, 10682bad8471SEric Van Hensbergen struct dentry *dentry) 10692bad8471SEric Van Hensbergen { 1070531b1094SLatchesar Ionkov int retval; 1071531b1094SLatchesar Ionkov struct v9fs_fid *oldfid; 1072531b1094SLatchesar Ionkov char *name; 10732bad8471SEric Van Hensbergen 10742bad8471SEric Van Hensbergen dprintk(DEBUG_VFS, " %lu,%s,%s\n", dir->i_ino, dentry->d_name.name, 10752bad8471SEric Van Hensbergen old_dentry->d_name.name); 10762bad8471SEric Van Hensbergen 1077531b1094SLatchesar Ionkov oldfid = v9fs_fid_lookup(old_dentry); 1078531b1094SLatchesar Ionkov if (!oldfid) { 1079531b1094SLatchesar Ionkov dprintk(DEBUG_ERROR, "can't find oldfid\n"); 1080531b1094SLatchesar Ionkov return -EPERM; 10812bad8471SEric Van Hensbergen } 10822bad8471SEric Van Hensbergen 1083531b1094SLatchesar Ionkov name = __getname(); 1084531b1094SLatchesar Ionkov sprintf(name, "hardlink(%d)\n", oldfid->fid); 1085531b1094SLatchesar Ionkov retval = v9fs_vfs_mkspecial(dir, dentry, V9FS_DMLINK, name); 1086531b1094SLatchesar Ionkov __putname(name); 10872bad8471SEric Van Hensbergen 10882bad8471SEric Van Hensbergen return retval; 10892bad8471SEric Van Hensbergen } 10902bad8471SEric Van Hensbergen 10912bad8471SEric Van Hensbergen /** 10922bad8471SEric Van Hensbergen * v9fs_vfs_mknod - create a special file 10932bad8471SEric Van Hensbergen * @dir: inode destination for new link 10942bad8471SEric Van Hensbergen * @dentry: dentry for file 10952bad8471SEric Van Hensbergen * @mode: mode for creation 10962bad8471SEric Van Hensbergen * @dev_t: device associated with special file 10972bad8471SEric Van Hensbergen * 10982bad8471SEric Van Hensbergen */ 10992bad8471SEric Van Hensbergen 11002bad8471SEric Van Hensbergen static int 11012bad8471SEric Van Hensbergen v9fs_vfs_mknod(struct inode *dir, struct dentry *dentry, int mode, dev_t rdev) 11022bad8471SEric Van Hensbergen { 1103531b1094SLatchesar Ionkov int retval; 1104531b1094SLatchesar Ionkov char *name; 11052bad8471SEric Van Hensbergen 11062bad8471SEric Van Hensbergen dprintk(DEBUG_VFS, " %lu,%s mode: %x MAJOR: %u MINOR: %u\n", dir->i_ino, 11072bad8471SEric Van Hensbergen dentry->d_name.name, mode, MAJOR(rdev), MINOR(rdev)); 11082bad8471SEric Van Hensbergen 1109531b1094SLatchesar Ionkov if (!new_valid_dev(rdev)) 1110531b1094SLatchesar Ionkov return -EINVAL; 111173c592b9SEric Van Hensbergen 1112531b1094SLatchesar Ionkov name = __getname(); 11132bad8471SEric Van Hensbergen /* build extension */ 11142bad8471SEric Van Hensbergen if (S_ISBLK(mode)) 1115531b1094SLatchesar Ionkov sprintf(name, "b %u %u", MAJOR(rdev), MINOR(rdev)); 11162bad8471SEric Van Hensbergen else if (S_ISCHR(mode)) 1117531b1094SLatchesar Ionkov sprintf(name, "c %u %u", MAJOR(rdev), MINOR(rdev)); 111873c592b9SEric Van Hensbergen else if (S_ISFIFO(mode)) 1119531b1094SLatchesar Ionkov *name = 0; 11202bad8471SEric Van Hensbergen else { 1121531b1094SLatchesar Ionkov __putname(name); 1122531b1094SLatchesar Ionkov return -EINVAL; 11232bad8471SEric Van Hensbergen } 11242bad8471SEric Van Hensbergen 1125531b1094SLatchesar Ionkov retval = v9fs_vfs_mkspecial(dir, dentry, mode, name); 1126531b1094SLatchesar Ionkov __putname(name); 11272bad8471SEric Van Hensbergen 11282bad8471SEric Van Hensbergen return retval; 11292bad8471SEric Van Hensbergen } 11302bad8471SEric Van Hensbergen 1131b501611aSEric Van Hensbergen static struct inode_operations v9fs_dir_inode_operations_ext = { 11322bad8471SEric Van Hensbergen .create = v9fs_vfs_create, 11332bad8471SEric Van Hensbergen .lookup = v9fs_vfs_lookup, 11342bad8471SEric Van Hensbergen .symlink = v9fs_vfs_symlink, 11352bad8471SEric Van Hensbergen .link = v9fs_vfs_link, 11362bad8471SEric Van Hensbergen .unlink = v9fs_vfs_unlink, 11372bad8471SEric Van Hensbergen .mkdir = v9fs_vfs_mkdir, 11382bad8471SEric Van Hensbergen .rmdir = v9fs_vfs_rmdir, 11392bad8471SEric Van Hensbergen .mknod = v9fs_vfs_mknod, 11402bad8471SEric Van Hensbergen .rename = v9fs_vfs_rename, 11412bad8471SEric Van Hensbergen .readlink = v9fs_vfs_readlink, 11422bad8471SEric Van Hensbergen .getattr = v9fs_vfs_getattr, 11432bad8471SEric Van Hensbergen .setattr = v9fs_vfs_setattr, 11442bad8471SEric Van Hensbergen }; 11452bad8471SEric Van Hensbergen 1146b501611aSEric Van Hensbergen static struct inode_operations v9fs_dir_inode_operations = { 1147b501611aSEric Van Hensbergen .create = v9fs_vfs_create, 1148b501611aSEric Van Hensbergen .lookup = v9fs_vfs_lookup, 1149b501611aSEric Van Hensbergen .unlink = v9fs_vfs_unlink, 1150b501611aSEric Van Hensbergen .mkdir = v9fs_vfs_mkdir, 1151b501611aSEric Van Hensbergen .rmdir = v9fs_vfs_rmdir, 1152b501611aSEric Van Hensbergen .mknod = v9fs_vfs_mknod, 1153b501611aSEric Van Hensbergen .rename = v9fs_vfs_rename, 1154b501611aSEric Van Hensbergen .getattr = v9fs_vfs_getattr, 1155b501611aSEric Van Hensbergen .setattr = v9fs_vfs_setattr, 1156b501611aSEric Van Hensbergen }; 1157b501611aSEric Van Hensbergen 11582bad8471SEric Van Hensbergen static struct inode_operations v9fs_file_inode_operations = { 11592bad8471SEric Van Hensbergen .getattr = v9fs_vfs_getattr, 11602bad8471SEric Van Hensbergen .setattr = v9fs_vfs_setattr, 11612bad8471SEric Van Hensbergen }; 11622bad8471SEric Van Hensbergen 11632bad8471SEric Van Hensbergen static struct inode_operations v9fs_symlink_inode_operations = { 11642bad8471SEric Van Hensbergen .readlink = v9fs_vfs_readlink, 11652bad8471SEric Van Hensbergen .follow_link = v9fs_vfs_follow_link, 11662bad8471SEric Van Hensbergen .put_link = v9fs_vfs_put_link, 11672bad8471SEric Van Hensbergen .getattr = v9fs_vfs_getattr, 11682bad8471SEric Van Hensbergen .setattr = v9fs_vfs_setattr, 11692bad8471SEric Van Hensbergen }; 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