12bad8471SEric Van Hensbergen /* 22bad8471SEric Van Hensbergen * linux/fs/9p/vfs_inode.c 32bad8471SEric Van Hensbergen * 473c592b9SEric Van Hensbergen * This file contains vfs inode ops for the 9P2000 protocol. 52bad8471SEric Van Hensbergen * 62bad8471SEric Van Hensbergen * Copyright (C) 2004 by Eric Van Hensbergen <ericvh@gmail.com> 72bad8471SEric Van Hensbergen * Copyright (C) 2002 by Ron Minnich <rminnich@lanl.gov> 82bad8471SEric Van Hensbergen * 92bad8471SEric Van Hensbergen * This program is free software; you can redistribute it and/or modify 1042e8c509SEric Van Hensbergen * it under the terms of the GNU General Public License version 2 1142e8c509SEric Van Hensbergen * as published by the Free Software Foundation. 122bad8471SEric Van Hensbergen * 132bad8471SEric Van Hensbergen * This program is distributed in the hope that it will be useful, 142bad8471SEric Van Hensbergen * but WITHOUT ANY WARRANTY; without even the implied warranty of 152bad8471SEric Van Hensbergen * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 162bad8471SEric Van Hensbergen * GNU General Public License for more details. 172bad8471SEric Van Hensbergen * 182bad8471SEric Van Hensbergen * You should have received a copy of the GNU General Public License 192bad8471SEric Van Hensbergen * along with this program; if not, write to: 202bad8471SEric Van Hensbergen * Free Software Foundation 212bad8471SEric Van Hensbergen * 51 Franklin Street, Fifth Floor 222bad8471SEric Van Hensbergen * Boston, MA 02111-1301 USA 232bad8471SEric Van Hensbergen * 242bad8471SEric Van Hensbergen */ 252bad8471SEric Van Hensbergen 262bad8471SEric Van Hensbergen #include <linux/module.h> 272bad8471SEric Van Hensbergen #include <linux/errno.h> 282bad8471SEric Van Hensbergen #include <linux/fs.h> 292bad8471SEric Van Hensbergen #include <linux/file.h> 302bad8471SEric Van Hensbergen #include <linux/pagemap.h> 312bad8471SEric Van Hensbergen #include <linux/stat.h> 322bad8471SEric Van Hensbergen #include <linux/string.h> 332bad8471SEric Van Hensbergen #include <linux/inet.h> 342bad8471SEric Van Hensbergen #include <linux/namei.h> 352bad8471SEric Van Hensbergen #include <linux/idr.h> 36e8edc6e0SAlexey Dobriyan #include <linux/sched.h> 375a0e3ad6STejun Heo #include <linux/slab.h> 38ebf46264SAneesh Kumar K.V #include <linux/xattr.h> 3985ff872dSAneesh Kumar K.V #include <linux/posix_acl.h> 40bd238fb4SLatchesar Ionkov #include <net/9p/9p.h> 41bd238fb4SLatchesar Ionkov #include <net/9p/client.h> 422bad8471SEric Van Hensbergen 432bad8471SEric Van Hensbergen #include "v9fs.h" 442bad8471SEric Van Hensbergen #include "v9fs_vfs.h" 452bad8471SEric Van Hensbergen #include "fid.h" 4660e78d2cSAbhishek Kulkarni #include "cache.h" 47ebf46264SAneesh Kumar K.V #include "xattr.h" 4885ff872dSAneesh Kumar K.V #include "acl.h" 492bad8471SEric Van Hensbergen 50754661f1SArjan van de Ven static const struct inode_operations v9fs_dir_inode_operations; 519b6533c9SSripathi Kodi static const struct inode_operations v9fs_dir_inode_operations_dotu; 529b6533c9SSripathi Kodi static const struct inode_operations v9fs_dir_inode_operations_dotl; 53754661f1SArjan van de Ven static const struct inode_operations v9fs_file_inode_operations; 549b6533c9SSripathi Kodi static const struct inode_operations v9fs_file_inode_operations_dotl; 55754661f1SArjan van de Ven static const struct inode_operations v9fs_symlink_inode_operations; 569b6533c9SSripathi Kodi static const struct inode_operations v9fs_symlink_inode_operations_dotl; 572bad8471SEric Van Hensbergen 582bad8471SEric Van Hensbergen /** 592bad8471SEric Van Hensbergen * unixmode2p9mode - convert unix mode bits to plan 9 602bad8471SEric Van Hensbergen * @v9ses: v9fs session information 612bad8471SEric Van Hensbergen * @mode: mode to convert 622bad8471SEric Van Hensbergen * 632bad8471SEric Van Hensbergen */ 642bad8471SEric Van Hensbergen 6573c592b9SEric Van Hensbergen static int unixmode2p9mode(struct v9fs_session_info *v9ses, int mode) 662bad8471SEric Van Hensbergen { 672bad8471SEric Van Hensbergen int res; 682bad8471SEric Van Hensbergen res = mode & 0777; 692bad8471SEric Van Hensbergen if (S_ISDIR(mode)) 70bd238fb4SLatchesar Ionkov res |= P9_DMDIR; 71dd6102fbSSripathi Kodi if (v9fs_proto_dotu(v9ses)) { 722bad8471SEric Van Hensbergen if (S_ISLNK(mode)) 73bd238fb4SLatchesar Ionkov res |= P9_DMSYMLINK; 742bad8471SEric Van Hensbergen if (v9ses->nodev == 0) { 752bad8471SEric Van Hensbergen if (S_ISSOCK(mode)) 76bd238fb4SLatchesar Ionkov res |= P9_DMSOCKET; 772bad8471SEric Van Hensbergen if (S_ISFIFO(mode)) 78bd238fb4SLatchesar Ionkov res |= P9_DMNAMEDPIPE; 792bad8471SEric Van Hensbergen if (S_ISBLK(mode)) 80bd238fb4SLatchesar Ionkov res |= P9_DMDEVICE; 812bad8471SEric Van Hensbergen if (S_ISCHR(mode)) 82bd238fb4SLatchesar Ionkov res |= P9_DMDEVICE; 832bad8471SEric Van Hensbergen } 842bad8471SEric Van Hensbergen 852bad8471SEric Van Hensbergen if ((mode & S_ISUID) == S_ISUID) 86bd238fb4SLatchesar Ionkov res |= P9_DMSETUID; 872bad8471SEric Van Hensbergen if ((mode & S_ISGID) == S_ISGID) 88bd238fb4SLatchesar Ionkov res |= P9_DMSETGID; 89d199d652SAnthony Liguori if ((mode & S_ISVTX) == S_ISVTX) 90d199d652SAnthony Liguori res |= P9_DMSETVTX; 91bd238fb4SLatchesar Ionkov if ((mode & P9_DMLINK)) 92bd238fb4SLatchesar Ionkov res |= P9_DMLINK; 932bad8471SEric Van Hensbergen } 942bad8471SEric Van Hensbergen 952bad8471SEric Van Hensbergen return res; 962bad8471SEric Van Hensbergen } 972bad8471SEric Van Hensbergen 982bad8471SEric Van Hensbergen /** 992bad8471SEric Van Hensbergen * p9mode2unixmode- convert plan9 mode bits to unix mode bits 1002bad8471SEric Van Hensbergen * @v9ses: v9fs session information 1012bad8471SEric Van Hensbergen * @mode: mode to convert 1022bad8471SEric Van Hensbergen * 1032bad8471SEric Van Hensbergen */ 1042bad8471SEric Van Hensbergen 10573c592b9SEric Van Hensbergen static int p9mode2unixmode(struct v9fs_session_info *v9ses, int mode) 1062bad8471SEric Van Hensbergen { 1072bad8471SEric Van Hensbergen int res; 1082bad8471SEric Van Hensbergen 1092bad8471SEric Van Hensbergen res = mode & 0777; 1102bad8471SEric Van Hensbergen 111bd238fb4SLatchesar Ionkov if ((mode & P9_DMDIR) == P9_DMDIR) 1122bad8471SEric Van Hensbergen res |= S_IFDIR; 113dd6102fbSSripathi Kodi else if ((mode & P9_DMSYMLINK) && (v9fs_proto_dotu(v9ses))) 1142bad8471SEric Van Hensbergen res |= S_IFLNK; 115dd6102fbSSripathi Kodi else if ((mode & P9_DMSOCKET) && (v9fs_proto_dotu(v9ses)) 1162bad8471SEric Van Hensbergen && (v9ses->nodev == 0)) 1172bad8471SEric Van Hensbergen res |= S_IFSOCK; 118dd6102fbSSripathi Kodi else if ((mode & P9_DMNAMEDPIPE) && (v9fs_proto_dotu(v9ses)) 1192bad8471SEric Van Hensbergen && (v9ses->nodev == 0)) 1202bad8471SEric Van Hensbergen res |= S_IFIFO; 121dd6102fbSSripathi Kodi else if ((mode & P9_DMDEVICE) && (v9fs_proto_dotu(v9ses)) 1222bad8471SEric Van Hensbergen && (v9ses->nodev == 0)) 1232bad8471SEric Van Hensbergen res |= S_IFBLK; 1242bad8471SEric Van Hensbergen else 1252bad8471SEric Van Hensbergen res |= S_IFREG; 1262bad8471SEric Van Hensbergen 127dd6102fbSSripathi Kodi if (v9fs_proto_dotu(v9ses)) { 128bd238fb4SLatchesar Ionkov if ((mode & P9_DMSETUID) == P9_DMSETUID) 1292bad8471SEric Van Hensbergen res |= S_ISUID; 1302bad8471SEric Van Hensbergen 131bd238fb4SLatchesar Ionkov if ((mode & P9_DMSETGID) == P9_DMSETGID) 1322bad8471SEric Van Hensbergen res |= S_ISGID; 133d199d652SAnthony Liguori 134d199d652SAnthony Liguori if ((mode & P9_DMSETVTX) == P9_DMSETVTX) 135d199d652SAnthony Liguori res |= S_ISVTX; 1362bad8471SEric Van Hensbergen } 1372bad8471SEric Van Hensbergen 1382bad8471SEric Van Hensbergen return res; 1392bad8471SEric Van Hensbergen } 1402bad8471SEric Van Hensbergen 141ee443996SEric Van Hensbergen /** 142ee443996SEric Van Hensbergen * v9fs_uflags2omode- convert posix open flags to plan 9 mode bits 143ee443996SEric Van Hensbergen * @uflags: flags to convert 1442e4bef41SEric Van Hensbergen * @extended: if .u extensions are active 145ee443996SEric Van Hensbergen */ 146ee443996SEric Van Hensbergen 1472e4bef41SEric Van Hensbergen int v9fs_uflags2omode(int uflags, int extended) 1486a3124a3SLatchesar Ionkov { 1496a3124a3SLatchesar Ionkov int ret; 1506a3124a3SLatchesar Ionkov 1516a3124a3SLatchesar Ionkov ret = 0; 1526a3124a3SLatchesar Ionkov switch (uflags&3) { 1536a3124a3SLatchesar Ionkov default: 1546a3124a3SLatchesar Ionkov case O_RDONLY: 155bd238fb4SLatchesar Ionkov ret = P9_OREAD; 1566a3124a3SLatchesar Ionkov break; 1576a3124a3SLatchesar Ionkov 1586a3124a3SLatchesar Ionkov case O_WRONLY: 159bd238fb4SLatchesar Ionkov ret = P9_OWRITE; 1606a3124a3SLatchesar Ionkov break; 1616a3124a3SLatchesar Ionkov 1626a3124a3SLatchesar Ionkov case O_RDWR: 163bd238fb4SLatchesar Ionkov ret = P9_ORDWR; 1646a3124a3SLatchesar Ionkov break; 1656a3124a3SLatchesar Ionkov } 1666a3124a3SLatchesar Ionkov 1676a3124a3SLatchesar Ionkov if (uflags & O_TRUNC) 168bd238fb4SLatchesar Ionkov ret |= P9_OTRUNC; 1696a3124a3SLatchesar Ionkov 1702e4bef41SEric Van Hensbergen if (extended) { 1712e4bef41SEric Van Hensbergen if (uflags & O_EXCL) 1722e4bef41SEric Van Hensbergen ret |= P9_OEXCL; 1732e4bef41SEric Van Hensbergen 1746a3124a3SLatchesar Ionkov if (uflags & O_APPEND) 175bd238fb4SLatchesar Ionkov ret |= P9_OAPPEND; 1762e4bef41SEric Van Hensbergen } 1776a3124a3SLatchesar Ionkov 1786a3124a3SLatchesar Ionkov return ret; 1796a3124a3SLatchesar Ionkov } 1806a3124a3SLatchesar Ionkov 1812bad8471SEric Van Hensbergen /** 182531b1094SLatchesar Ionkov * v9fs_blank_wstat - helper function to setup a 9P stat structure 183531b1094SLatchesar Ionkov * @wstat: structure to initialize 1842bad8471SEric Van Hensbergen * 1852bad8471SEric Van Hensbergen */ 1862bad8471SEric Van Hensbergen 1877a4439c4SM. Mohan Kumar void 188bd238fb4SLatchesar Ionkov v9fs_blank_wstat(struct p9_wstat *wstat) 1892bad8471SEric Van Hensbergen { 190531b1094SLatchesar Ionkov wstat->type = ~0; 191531b1094SLatchesar Ionkov wstat->dev = ~0; 192531b1094SLatchesar Ionkov wstat->qid.type = ~0; 193531b1094SLatchesar Ionkov wstat->qid.version = ~0; 194531b1094SLatchesar Ionkov *((long long *)&wstat->qid.path) = ~0; 195531b1094SLatchesar Ionkov wstat->mode = ~0; 196531b1094SLatchesar Ionkov wstat->atime = ~0; 197531b1094SLatchesar Ionkov wstat->mtime = ~0; 198531b1094SLatchesar Ionkov wstat->length = ~0; 199531b1094SLatchesar Ionkov wstat->name = NULL; 200531b1094SLatchesar Ionkov wstat->uid = NULL; 201531b1094SLatchesar Ionkov wstat->gid = NULL; 202531b1094SLatchesar Ionkov wstat->muid = NULL; 203531b1094SLatchesar Ionkov wstat->n_uid = ~0; 204531b1094SLatchesar Ionkov wstat->n_gid = ~0; 205531b1094SLatchesar Ionkov wstat->n_muid = ~0; 206531b1094SLatchesar Ionkov wstat->extension = NULL; 2072bad8471SEric Van Hensbergen } 2082bad8471SEric Van Hensbergen 20960e78d2cSAbhishek Kulkarni #ifdef CONFIG_9P_FSCACHE 21060e78d2cSAbhishek Kulkarni /** 21160e78d2cSAbhishek Kulkarni * v9fs_alloc_inode - helper function to allocate an inode 21260e78d2cSAbhishek Kulkarni * This callback is executed before setting up the inode so that we 21360e78d2cSAbhishek Kulkarni * can associate a vcookie with each inode. 21460e78d2cSAbhishek Kulkarni * 21560e78d2cSAbhishek Kulkarni */ 21660e78d2cSAbhishek Kulkarni 21760e78d2cSAbhishek Kulkarni struct inode *v9fs_alloc_inode(struct super_block *sb) 21860e78d2cSAbhishek Kulkarni { 21960e78d2cSAbhishek Kulkarni struct v9fs_cookie *vcookie; 22060e78d2cSAbhishek Kulkarni vcookie = (struct v9fs_cookie *)kmem_cache_alloc(vcookie_cache, 22160e78d2cSAbhishek Kulkarni GFP_KERNEL); 22260e78d2cSAbhishek Kulkarni if (!vcookie) 22360e78d2cSAbhishek Kulkarni return NULL; 22460e78d2cSAbhishek Kulkarni 22560e78d2cSAbhishek Kulkarni vcookie->fscache = NULL; 22660e78d2cSAbhishek Kulkarni vcookie->qid = NULL; 22760e78d2cSAbhishek Kulkarni spin_lock_init(&vcookie->lock); 22860e78d2cSAbhishek Kulkarni return &vcookie->inode; 22960e78d2cSAbhishek Kulkarni } 23060e78d2cSAbhishek Kulkarni 23160e78d2cSAbhishek Kulkarni /** 23260e78d2cSAbhishek Kulkarni * v9fs_destroy_inode - destroy an inode 23360e78d2cSAbhishek Kulkarni * 23460e78d2cSAbhishek Kulkarni */ 23560e78d2cSAbhishek Kulkarni 23660e78d2cSAbhishek Kulkarni void v9fs_destroy_inode(struct inode *inode) 23760e78d2cSAbhishek Kulkarni { 23860e78d2cSAbhishek Kulkarni kmem_cache_free(vcookie_cache, v9fs_inode2cookie(inode)); 23960e78d2cSAbhishek Kulkarni } 24060e78d2cSAbhishek Kulkarni #endif 24160e78d2cSAbhishek Kulkarni 2422bad8471SEric Van Hensbergen /** 24309d34ee5SEric Van Hensbergen * v9fs_get_fsgid_for_create - Helper function to get the gid for creating a 24409d34ee5SEric Van Hensbergen * new file system object. This checks the S_ISGID to determine the owning 24509d34ee5SEric Van Hensbergen * group of the new file system object. 24609d34ee5SEric Van Hensbergen */ 24709d34ee5SEric Van Hensbergen 24809d34ee5SEric Van Hensbergen static gid_t v9fs_get_fsgid_for_create(struct inode *dir_inode) 24909d34ee5SEric Van Hensbergen { 25009d34ee5SEric Van Hensbergen BUG_ON(dir_inode == NULL); 25109d34ee5SEric Van Hensbergen 25209d34ee5SEric Van Hensbergen if (dir_inode->i_mode & S_ISGID) { 25309d34ee5SEric Van Hensbergen /* set_gid bit is set.*/ 25409d34ee5SEric Van Hensbergen return dir_inode->i_gid; 25509d34ee5SEric Van Hensbergen } 25609d34ee5SEric Van Hensbergen return current_fsgid(); 25709d34ee5SEric Van Hensbergen } 25809d34ee5SEric Van Hensbergen 25909d34ee5SEric Van Hensbergen /** 26009d34ee5SEric Van Hensbergen * v9fs_dentry_from_dir_inode - helper function to get the dentry from 26109d34ee5SEric Van Hensbergen * dir inode. 26209d34ee5SEric Van Hensbergen * 26309d34ee5SEric Van Hensbergen */ 26409d34ee5SEric Van Hensbergen 265ea137533SEric Van Hensbergen static struct dentry *v9fs_dentry_from_dir_inode(struct inode *inode) 26609d34ee5SEric Van Hensbergen { 26709d34ee5SEric Van Hensbergen struct dentry *dentry; 26809d34ee5SEric Van Hensbergen 26909d34ee5SEric Van Hensbergen spin_lock(&dcache_lock); 27009d34ee5SEric Van Hensbergen /* Directory should have only one entry. */ 27109d34ee5SEric Van Hensbergen BUG_ON(S_ISDIR(inode->i_mode) && !list_is_singular(&inode->i_dentry)); 27209d34ee5SEric Van Hensbergen dentry = list_entry(inode->i_dentry.next, struct dentry, d_alias); 27309d34ee5SEric Van Hensbergen spin_unlock(&dcache_lock); 27409d34ee5SEric Van Hensbergen return dentry; 27509d34ee5SEric Van Hensbergen } 27609d34ee5SEric Van Hensbergen 27709d34ee5SEric Van Hensbergen /** 2782bad8471SEric Van Hensbergen * v9fs_get_inode - helper function to setup an inode 2792bad8471SEric Van Hensbergen * @sb: superblock 2802bad8471SEric Van Hensbergen * @mode: mode to setup inode with 2812bad8471SEric Van Hensbergen * 2822bad8471SEric Van Hensbergen */ 2832bad8471SEric Van Hensbergen 2842bad8471SEric Van Hensbergen struct inode *v9fs_get_inode(struct super_block *sb, int mode) 2852bad8471SEric Van Hensbergen { 2862bb54115SAbhishek Kulkarni int err; 2876a3124a3SLatchesar Ionkov struct inode *inode; 288b501611aSEric Van Hensbergen struct v9fs_session_info *v9ses = sb->s_fs_info; 2892bad8471SEric Van Hensbergen 290bd238fb4SLatchesar Ionkov P9_DPRINTK(P9_DEBUG_VFS, "super block: %p mode: %o\n", sb, mode); 2912bad8471SEric Van Hensbergen 2922bad8471SEric Van Hensbergen inode = new_inode(sb); 2932bb54115SAbhishek Kulkarni if (!inode) { 2942bb54115SAbhishek Kulkarni P9_EPRINTK(KERN_WARNING, "Problem allocating inode\n"); 29548559b4cSAbhishek Kulkarni return ERR_PTR(-ENOMEM); 2962bb54115SAbhishek Kulkarni } 2972bb54115SAbhishek Kulkarni 298217f206dSDmitry Monakhov inode_init_owner(inode, NULL, mode); 2992bad8471SEric Van Hensbergen inode->i_blocks = 0; 3002bad8471SEric Van Hensbergen inode->i_rdev = 0; 3012bad8471SEric Van Hensbergen inode->i_atime = inode->i_mtime = inode->i_ctime = CURRENT_TIME; 302147b31cfSEric Van Hensbergen inode->i_mapping->a_ops = &v9fs_addr_operations; 3032bad8471SEric Van Hensbergen 3042bad8471SEric Van Hensbergen switch (mode & S_IFMT) { 3052bad8471SEric Van Hensbergen case S_IFIFO: 3062bad8471SEric Van Hensbergen case S_IFBLK: 3072bad8471SEric Van Hensbergen case S_IFCHR: 3082bad8471SEric Van Hensbergen case S_IFSOCK: 3094b43516aSM. Mohan Kumar if (v9fs_proto_dotl(v9ses)) { 3104b43516aSM. Mohan Kumar inode->i_op = &v9fs_file_inode_operations_dotl; 3114b43516aSM. Mohan Kumar inode->i_fop = &v9fs_file_operations_dotl; 3124b43516aSM. Mohan Kumar } else if (v9fs_proto_dotu(v9ses)) { 3134b43516aSM. Mohan Kumar inode->i_op = &v9fs_file_inode_operations; 3144b43516aSM. Mohan Kumar inode->i_fop = &v9fs_file_operations; 3154b43516aSM. Mohan Kumar } else { 316bd238fb4SLatchesar Ionkov P9_DPRINTK(P9_DEBUG_ERROR, 317bd238fb4SLatchesar Ionkov "special files without extended mode\n"); 3182bb54115SAbhishek Kulkarni err = -EINVAL; 3192bb54115SAbhishek Kulkarni goto error; 320b501611aSEric Van Hensbergen } 3212bb54115SAbhishek Kulkarni init_special_inode(inode, inode->i_mode, inode->i_rdev); 3225d58bec5SEric Van Hensbergen break; 3232bad8471SEric Van Hensbergen case S_IFREG: 3249b6533c9SSripathi Kodi if (v9fs_proto_dotl(v9ses)) { 3259b6533c9SSripathi Kodi inode->i_op = &v9fs_file_inode_operations_dotl; 3269b6533c9SSripathi Kodi inode->i_fop = &v9fs_file_operations_dotl; 3279b6533c9SSripathi Kodi } else { 3282bad8471SEric Van Hensbergen inode->i_op = &v9fs_file_inode_operations; 3292bad8471SEric Van Hensbergen inode->i_fop = &v9fs_file_operations; 3309b6533c9SSripathi Kodi } 3319b6533c9SSripathi Kodi 3322bad8471SEric Van Hensbergen break; 3339b6533c9SSripathi Kodi 334b501611aSEric Van Hensbergen case S_IFLNK: 3359b6533c9SSripathi Kodi if (!v9fs_proto_dotu(v9ses) && !v9fs_proto_dotl(v9ses)) { 3369b6533c9SSripathi Kodi P9_DPRINTK(P9_DEBUG_ERROR, "extended modes used with " 3379b6533c9SSripathi Kodi "legacy protocol.\n"); 3382bb54115SAbhishek Kulkarni err = -EINVAL; 3392bb54115SAbhishek Kulkarni goto error; 340b501611aSEric Van Hensbergen } 3419b6533c9SSripathi Kodi 3429b6533c9SSripathi Kodi if (v9fs_proto_dotl(v9ses)) 3439b6533c9SSripathi Kodi inode->i_op = &v9fs_symlink_inode_operations_dotl; 3449b6533c9SSripathi Kodi else 345b501611aSEric Van Hensbergen inode->i_op = &v9fs_symlink_inode_operations; 3469b6533c9SSripathi Kodi 347b501611aSEric Van Hensbergen break; 3482bad8471SEric Van Hensbergen case S_IFDIR: 349d8c76e6fSDave Hansen inc_nlink(inode); 3509b6533c9SSripathi Kodi if (v9fs_proto_dotl(v9ses)) 3519b6533c9SSripathi Kodi inode->i_op = &v9fs_dir_inode_operations_dotl; 3529b6533c9SSripathi Kodi else if (v9fs_proto_dotu(v9ses)) 3539b6533c9SSripathi Kodi inode->i_op = &v9fs_dir_inode_operations_dotu; 354b501611aSEric Van Hensbergen else 3552bad8471SEric Van Hensbergen inode->i_op = &v9fs_dir_inode_operations; 3569b6533c9SSripathi Kodi 3579b6533c9SSripathi Kodi if (v9fs_proto_dotl(v9ses)) 3589b6533c9SSripathi Kodi inode->i_fop = &v9fs_dir_operations_dotl; 3599b6533c9SSripathi Kodi else 3602bad8471SEric Van Hensbergen inode->i_fop = &v9fs_dir_operations; 3619b6533c9SSripathi Kodi 3622bad8471SEric Van Hensbergen break; 3632bad8471SEric Van Hensbergen default: 3642bb54115SAbhishek Kulkarni P9_DPRINTK(P9_DEBUG_ERROR, "BAD mode 0x%x S_IFMT 0x%x\n", 3652bad8471SEric Van Hensbergen mode, mode & S_IFMT); 3662bb54115SAbhishek Kulkarni err = -EINVAL; 3672bb54115SAbhishek Kulkarni goto error; 3682bad8471SEric Van Hensbergen } 3692bb54115SAbhishek Kulkarni 3702bad8471SEric Van Hensbergen return inode; 3712bb54115SAbhishek Kulkarni 3722bb54115SAbhishek Kulkarni error: 3732bb54115SAbhishek Kulkarni iput(inode); 3742bb54115SAbhishek Kulkarni return ERR_PTR(err); 3752bad8471SEric Van Hensbergen } 3762bad8471SEric Van Hensbergen 377bd238fb4SLatchesar Ionkov /* 3786a3124a3SLatchesar Ionkov static struct v9fs_fid* 3796a3124a3SLatchesar Ionkov v9fs_clone_walk(struct v9fs_session_info *v9ses, u32 fid, struct dentry *dentry) 3806a3124a3SLatchesar Ionkov { 3816a3124a3SLatchesar Ionkov int err; 382736c4b85SMika Kukkonen int nfid; 3836a3124a3SLatchesar Ionkov struct v9fs_fid *ret; 3846a3124a3SLatchesar Ionkov struct v9fs_fcall *fcall; 3850b8dd177SLatchesar Ionkov 3866a3124a3SLatchesar Ionkov nfid = v9fs_get_idpool(&v9ses->fidpool); 3876a3124a3SLatchesar Ionkov if (nfid < 0) { 3880b8dd177SLatchesar Ionkov eprintk(KERN_WARNING, "no free fids available\n"); 389731805b4SLatchesar Ionkov return ERR_PTR(-ENOSPC); 3900b8dd177SLatchesar Ionkov } 3910b8dd177SLatchesar Ionkov 3926a3124a3SLatchesar Ionkov err = v9fs_t_walk(v9ses, fid, nfid, (char *) dentry->d_name.name, 3936a3124a3SLatchesar Ionkov &fcall); 3946a3124a3SLatchesar Ionkov 3956a3124a3SLatchesar Ionkov if (err < 0) { 39641e5a6acSLatchesar Ionkov if (fcall && fcall->id == RWALK) 39741e5a6acSLatchesar Ionkov goto clunk_fid; 39841e5a6acSLatchesar Ionkov 3996a3124a3SLatchesar Ionkov PRINT_FCALL_ERROR("walk error", fcall); 4006a3124a3SLatchesar Ionkov v9fs_put_idpool(nfid, &v9ses->fidpool); 4016a3124a3SLatchesar Ionkov goto error; 4020b8dd177SLatchesar Ionkov } 4036a3124a3SLatchesar Ionkov 4043cf6429aSLatchesar Ionkov kfree(fcall); 4053cf6429aSLatchesar Ionkov fcall = NULL; 4066a3124a3SLatchesar Ionkov ret = v9fs_fid_create(v9ses, nfid); 4076a3124a3SLatchesar Ionkov if (!ret) { 4086a3124a3SLatchesar Ionkov err = -ENOMEM; 4096a3124a3SLatchesar Ionkov goto clunk_fid; 4100b8dd177SLatchesar Ionkov } 4112bad8471SEric Van Hensbergen 4126a3124a3SLatchesar Ionkov err = v9fs_fid_insert(ret, dentry); 4136a3124a3SLatchesar Ionkov if (err < 0) { 4146a3124a3SLatchesar Ionkov v9fs_fid_destroy(ret); 4156a3124a3SLatchesar Ionkov goto clunk_fid; 4166a3124a3SLatchesar Ionkov } 4172bad8471SEric Van Hensbergen 4186a3124a3SLatchesar Ionkov return ret; 4196a3124a3SLatchesar Ionkov 4206a3124a3SLatchesar Ionkov clunk_fid: 4216a3124a3SLatchesar Ionkov v9fs_t_clunk(v9ses, nfid); 4226a3124a3SLatchesar Ionkov 4236a3124a3SLatchesar Ionkov error: 4246a3124a3SLatchesar Ionkov kfree(fcall); 4256a3124a3SLatchesar Ionkov return ERR_PTR(err); 4266a3124a3SLatchesar Ionkov } 427bd238fb4SLatchesar Ionkov */ 4286a3124a3SLatchesar Ionkov 42960e78d2cSAbhishek Kulkarni 43060e78d2cSAbhishek Kulkarni /** 43160e78d2cSAbhishek Kulkarni * v9fs_clear_inode - release an inode 43260e78d2cSAbhishek Kulkarni * @inode: inode to release 43360e78d2cSAbhishek Kulkarni * 43460e78d2cSAbhishek Kulkarni */ 435b57922d9SAl Viro void v9fs_evict_inode(struct inode *inode) 43660e78d2cSAbhishek Kulkarni { 437b57922d9SAl Viro truncate_inode_pages(inode->i_mapping, 0); 438b57922d9SAl Viro end_writeback(inode); 43960e78d2cSAbhishek Kulkarni filemap_fdatawrite(inode->i_mapping); 44060e78d2cSAbhishek Kulkarni 44160e78d2cSAbhishek Kulkarni #ifdef CONFIG_9P_FSCACHE 44260e78d2cSAbhishek Kulkarni v9fs_cache_inode_put_cookie(inode); 44360e78d2cSAbhishek Kulkarni #endif 44460e78d2cSAbhishek Kulkarni } 44560e78d2cSAbhishek Kulkarni 4465174fdabSLatchesar Ionkov static struct inode * 447f0853122SSripathi Kodi v9fs_inode(struct v9fs_session_info *v9ses, struct p9_fid *fid, 4486a3124a3SLatchesar Ionkov struct super_block *sb) 4496a3124a3SLatchesar Ionkov { 4506a3124a3SLatchesar Ionkov int err, umode; 451f0853122SSripathi Kodi struct inode *ret = NULL; 45251a87c55SEric Van Hensbergen struct p9_wstat *st; 4536a3124a3SLatchesar Ionkov 454bd238fb4SLatchesar Ionkov st = p9_client_stat(fid); 45502bc3567SAbhishek Kulkarni if (IS_ERR(st)) 45602bc3567SAbhishek Kulkarni return ERR_CAST(st); 4572bad8471SEric Van Hensbergen 458bd238fb4SLatchesar Ionkov umode = p9mode2unixmode(v9ses, st->mode); 4596a3124a3SLatchesar Ionkov ret = v9fs_get_inode(sb, umode); 4606a3124a3SLatchesar Ionkov if (IS_ERR(ret)) { 4616a3124a3SLatchesar Ionkov err = PTR_ERR(ret); 4626a3124a3SLatchesar Ionkov goto error; 4632bad8471SEric Van Hensbergen } 4642bad8471SEric Van Hensbergen 465bd238fb4SLatchesar Ionkov v9fs_stat2inode(st, ret, sb); 466bd238fb4SLatchesar Ionkov ret->i_ino = v9fs_qid2ino(&st->qid); 46760e78d2cSAbhishek Kulkarni 46860e78d2cSAbhishek Kulkarni #ifdef CONFIG_9P_FSCACHE 46960e78d2cSAbhishek Kulkarni v9fs_vcookie_set_qid(ret, &st->qid); 47060e78d2cSAbhishek Kulkarni v9fs_cache_inode_get_cookie(ret); 47160e78d2cSAbhishek Kulkarni #endif 47202bc3567SAbhishek Kulkarni p9stat_free(st); 473bd238fb4SLatchesar Ionkov kfree(st); 4746a3124a3SLatchesar Ionkov return ret; 4756a3124a3SLatchesar Ionkov error: 47602bc3567SAbhishek Kulkarni p9stat_free(st); 477bd238fb4SLatchesar Ionkov kfree(st); 4786a3124a3SLatchesar Ionkov return ERR_PTR(err); 4792bad8471SEric Van Hensbergen } 4802bad8471SEric Van Hensbergen 481f0853122SSripathi Kodi static struct inode * 482f0853122SSripathi Kodi v9fs_inode_dotl(struct v9fs_session_info *v9ses, struct p9_fid *fid, 483f0853122SSripathi Kodi struct super_block *sb) 484f0853122SSripathi Kodi { 485f0853122SSripathi Kodi struct inode *ret = NULL; 486f0853122SSripathi Kodi int err; 487f0853122SSripathi Kodi struct p9_stat_dotl *st; 488f0853122SSripathi Kodi 489f0853122SSripathi Kodi st = p9_client_getattr_dotl(fid, P9_STATS_BASIC); 490f0853122SSripathi Kodi if (IS_ERR(st)) 491f0853122SSripathi Kodi return ERR_CAST(st); 492f0853122SSripathi Kodi 493f0853122SSripathi Kodi ret = v9fs_get_inode(sb, st->st_mode); 494f0853122SSripathi Kodi if (IS_ERR(ret)) { 495f0853122SSripathi Kodi err = PTR_ERR(ret); 496f0853122SSripathi Kodi goto error; 497f0853122SSripathi Kodi } 498f0853122SSripathi Kodi 499f0853122SSripathi Kodi v9fs_stat2inode_dotl(st, ret); 500f0853122SSripathi Kodi ret->i_ino = v9fs_qid2ino(&st->qid); 501f0853122SSripathi Kodi #ifdef CONFIG_9P_FSCACHE 502f0853122SSripathi Kodi v9fs_vcookie_set_qid(ret, &st->qid); 503f0853122SSripathi Kodi v9fs_cache_inode_get_cookie(ret); 504f0853122SSripathi Kodi #endif 50585ff872dSAneesh Kumar K.V err = v9fs_get_acl(ret, fid); 50685ff872dSAneesh Kumar K.V if (err) { 50785ff872dSAneesh Kumar K.V iput(ret); 50885ff872dSAneesh Kumar K.V goto error; 50985ff872dSAneesh Kumar K.V } 510f0853122SSripathi Kodi kfree(st); 511f0853122SSripathi Kodi return ret; 512f0853122SSripathi Kodi error: 513f0853122SSripathi Kodi kfree(st); 514f0853122SSripathi Kodi return ERR_PTR(err); 515f0853122SSripathi Kodi } 516f0853122SSripathi Kodi 517f0853122SSripathi Kodi /** 518f0853122SSripathi Kodi * v9fs_inode_from_fid - Helper routine to populate an inode by 519f0853122SSripathi Kodi * issuing a attribute request 520f0853122SSripathi Kodi * @v9ses: session information 521f0853122SSripathi Kodi * @fid: fid to issue attribute request for 522f0853122SSripathi Kodi * @sb: superblock on which to create inode 523f0853122SSripathi Kodi * 524f0853122SSripathi Kodi */ 525f0853122SSripathi Kodi static inline struct inode * 526f0853122SSripathi Kodi v9fs_inode_from_fid(struct v9fs_session_info *v9ses, struct p9_fid *fid, 527f0853122SSripathi Kodi struct super_block *sb) 528f0853122SSripathi Kodi { 529f0853122SSripathi Kodi if (v9fs_proto_dotl(v9ses)) 530f0853122SSripathi Kodi return v9fs_inode_dotl(v9ses, fid, sb); 531f0853122SSripathi Kodi else 532f0853122SSripathi Kodi return v9fs_inode(v9ses, fid, sb); 533f0853122SSripathi Kodi } 534f0853122SSripathi Kodi 5352bad8471SEric Van Hensbergen /** 5362bad8471SEric Van Hensbergen * v9fs_remove - helper function to remove files and directories 53773c592b9SEric Van Hensbergen * @dir: directory inode that is being deleted 53873c592b9SEric Van Hensbergen * @file: dentry that is being deleted 53973c592b9SEric Van Hensbergen * @rmdir: removing a directory 5402bad8471SEric Van Hensbergen * 5412bad8471SEric Van Hensbergen */ 5422bad8471SEric Van Hensbergen 5432bad8471SEric Van Hensbergen static int v9fs_remove(struct inode *dir, struct dentry *file, int rmdir) 5442bad8471SEric Van Hensbergen { 545d994f405SAneesh Kumar K.V int retval; 546bd238fb4SLatchesar Ionkov struct inode *file_inode; 547bd238fb4SLatchesar Ionkov struct p9_fid *v9fid; 5482bad8471SEric Van Hensbergen 549bd238fb4SLatchesar Ionkov P9_DPRINTK(P9_DEBUG_VFS, "inode: %p dentry: %p rmdir: %d\n", dir, file, 5502bad8471SEric Van Hensbergen rmdir); 5512bad8471SEric Van Hensbergen 5522bad8471SEric Van Hensbergen file_inode = file->d_inode; 553c959df9fSLatchesar Ionkov v9fid = v9fs_fid_clone(file); 554da977b2cSEric Van Hensbergen if (IS_ERR(v9fid)) 555da977b2cSEric Van Hensbergen return PTR_ERR(v9fid); 5562bad8471SEric Van Hensbergen 557d994f405SAneesh Kumar K.V retval = p9_client_remove(v9fid); 558d994f405SAneesh Kumar K.V if (!retval) 559d994f405SAneesh Kumar K.V drop_nlink(file_inode); 560d994f405SAneesh Kumar K.V return retval; 5612bad8471SEric Van Hensbergen } 5622bad8471SEric Van Hensbergen 5636a3124a3SLatchesar Ionkov static int 5646a3124a3SLatchesar Ionkov v9fs_open_created(struct inode *inode, struct file *file) 5656a3124a3SLatchesar Ionkov { 5666a3124a3SLatchesar Ionkov return 0; 5676a3124a3SLatchesar Ionkov } 5686a3124a3SLatchesar Ionkov 569bd238fb4SLatchesar Ionkov 570bd238fb4SLatchesar Ionkov /** 571bd238fb4SLatchesar Ionkov * v9fs_create - Create a file 572ee443996SEric Van Hensbergen * @v9ses: session information 573ee443996SEric Van Hensbergen * @dir: directory that dentry is being created in 574bd238fb4SLatchesar Ionkov * @dentry: dentry that is being created 5750e15597eSAbhishek Kulkarni * @extension: 9p2000.u extension string to support devices, etc. 576bd238fb4SLatchesar Ionkov * @perm: create permissions 577bd238fb4SLatchesar Ionkov * @mode: open mode 578bd238fb4SLatchesar Ionkov * 579bd238fb4SLatchesar Ionkov */ 580bd238fb4SLatchesar Ionkov static struct p9_fid * 581bd238fb4SLatchesar Ionkov v9fs_create(struct v9fs_session_info *v9ses, struct inode *dir, 582bd238fb4SLatchesar Ionkov struct dentry *dentry, char *extension, u32 perm, u8 mode) 583bd238fb4SLatchesar Ionkov { 584bd238fb4SLatchesar Ionkov int err; 585bd238fb4SLatchesar Ionkov char *name; 586bd238fb4SLatchesar Ionkov struct p9_fid *dfid, *ofid, *fid; 587bd238fb4SLatchesar Ionkov struct inode *inode; 588bd238fb4SLatchesar Ionkov 58951a87c55SEric Van Hensbergen P9_DPRINTK(P9_DEBUG_VFS, "name %s\n", dentry->d_name.name); 59051a87c55SEric Van Hensbergen 591bd238fb4SLatchesar Ionkov err = 0; 592bd238fb4SLatchesar Ionkov ofid = NULL; 593bd238fb4SLatchesar Ionkov fid = NULL; 594bd238fb4SLatchesar Ionkov name = (char *) dentry->d_name.name; 5956d27e64dSVenkateswararao Jujjuri dfid = v9fs_fid_lookup(dentry->d_parent); 596bd238fb4SLatchesar Ionkov if (IS_ERR(dfid)) { 597bd238fb4SLatchesar Ionkov err = PTR_ERR(dfid); 5986d27e64dSVenkateswararao Jujjuri P9_DPRINTK(P9_DEBUG_VFS, "fid lookup failed %d\n", err); 5996d27e64dSVenkateswararao Jujjuri return ERR_PTR(err); 600bd238fb4SLatchesar Ionkov } 601bd238fb4SLatchesar Ionkov 602bd238fb4SLatchesar Ionkov /* clone a fid to use for creation */ 603bd238fb4SLatchesar Ionkov ofid = p9_client_walk(dfid, 0, NULL, 1); 604bd238fb4SLatchesar Ionkov if (IS_ERR(ofid)) { 605bd238fb4SLatchesar Ionkov err = PTR_ERR(ofid); 60651a87c55SEric Van Hensbergen P9_DPRINTK(P9_DEBUG_VFS, "p9_client_walk failed %d\n", err); 6076d27e64dSVenkateswararao Jujjuri return ERR_PTR(err); 608bd238fb4SLatchesar Ionkov } 609bd238fb4SLatchesar Ionkov 610bd238fb4SLatchesar Ionkov err = p9_client_fcreate(ofid, name, perm, mode, extension); 61151a87c55SEric Van Hensbergen if (err < 0) { 61251a87c55SEric Van Hensbergen P9_DPRINTK(P9_DEBUG_VFS, "p9_client_fcreate failed %d\n", err); 613bd238fb4SLatchesar Ionkov goto error; 61451a87c55SEric Van Hensbergen } 615bd238fb4SLatchesar Ionkov 616bd238fb4SLatchesar Ionkov /* now walk from the parent so we can get unopened fid */ 6176d27e64dSVenkateswararao Jujjuri fid = p9_client_walk(dfid, 1, &name, 1); 618bd238fb4SLatchesar Ionkov if (IS_ERR(fid)) { 619bd238fb4SLatchesar Ionkov err = PTR_ERR(fid); 62051a87c55SEric Van Hensbergen P9_DPRINTK(P9_DEBUG_VFS, "p9_client_walk failed %d\n", err); 621bd238fb4SLatchesar Ionkov fid = NULL; 622bd238fb4SLatchesar Ionkov goto error; 6236d27e64dSVenkateswararao Jujjuri } 624bd238fb4SLatchesar Ionkov 625bd238fb4SLatchesar Ionkov /* instantiate inode and assign the unopened fid to the dentry */ 626bd238fb4SLatchesar Ionkov inode = v9fs_inode_from_fid(v9ses, fid, dir->i_sb); 627bd238fb4SLatchesar Ionkov if (IS_ERR(inode)) { 628bd238fb4SLatchesar Ionkov err = PTR_ERR(inode); 62951a87c55SEric Van Hensbergen P9_DPRINTK(P9_DEBUG_VFS, "inode creation failed %d\n", err); 630bd238fb4SLatchesar Ionkov goto error; 631bd238fb4SLatchesar Ionkov } 632bd238fb4SLatchesar Ionkov 633bd238fb4SLatchesar Ionkov if (v9ses->cache) 634bd238fb4SLatchesar Ionkov dentry->d_op = &v9fs_cached_dentry_operations; 635bd238fb4SLatchesar Ionkov else 636bd238fb4SLatchesar Ionkov dentry->d_op = &v9fs_dentry_operations; 637bd238fb4SLatchesar Ionkov 638bd238fb4SLatchesar Ionkov d_instantiate(dentry, inode); 63950fb6d2bSAbhishek Kulkarni err = v9fs_fid_add(dentry, fid); 64050fb6d2bSAbhishek Kulkarni if (err < 0) 64150fb6d2bSAbhishek Kulkarni goto error; 64250fb6d2bSAbhishek Kulkarni 643bd238fb4SLatchesar Ionkov return ofid; 644bd238fb4SLatchesar Ionkov 645bd238fb4SLatchesar Ionkov error: 646bd238fb4SLatchesar Ionkov if (ofid) 647bd238fb4SLatchesar Ionkov p9_client_clunk(ofid); 648bd238fb4SLatchesar Ionkov 649bd238fb4SLatchesar Ionkov if (fid) 650bd238fb4SLatchesar Ionkov p9_client_clunk(fid); 651bd238fb4SLatchesar Ionkov 652bd238fb4SLatchesar Ionkov return ERR_PTR(err); 653bd238fb4SLatchesar Ionkov } 654bd238fb4SLatchesar Ionkov 6552bad8471SEric Van Hensbergen /** 6565643135aSVenkateswararao Jujjuri (JV) * v9fs_vfs_create_dotl - VFS hook to create files for 9P2000.L protocol. 6575643135aSVenkateswararao Jujjuri (JV) * @dir: directory inode that is being created 6585643135aSVenkateswararao Jujjuri (JV) * @dentry: dentry that is being deleted 6595643135aSVenkateswararao Jujjuri (JV) * @mode: create permissions 6605643135aSVenkateswararao Jujjuri (JV) * @nd: path information 6615643135aSVenkateswararao Jujjuri (JV) * 6625643135aSVenkateswararao Jujjuri (JV) */ 6635643135aSVenkateswararao Jujjuri (JV) 6645643135aSVenkateswararao Jujjuri (JV) static int 6655643135aSVenkateswararao Jujjuri (JV) v9fs_vfs_create_dotl(struct inode *dir, struct dentry *dentry, int mode, 6665643135aSVenkateswararao Jujjuri (JV) struct nameidata *nd) 6675643135aSVenkateswararao Jujjuri (JV) { 6685643135aSVenkateswararao Jujjuri (JV) int err = 0; 6695643135aSVenkateswararao Jujjuri (JV) char *name = NULL; 6705643135aSVenkateswararao Jujjuri (JV) gid_t gid; 6715643135aSVenkateswararao Jujjuri (JV) int flags; 6725643135aSVenkateswararao Jujjuri (JV) struct v9fs_session_info *v9ses; 6735643135aSVenkateswararao Jujjuri (JV) struct p9_fid *fid = NULL; 6745643135aSVenkateswararao Jujjuri (JV) struct p9_fid *dfid, *ofid; 6755643135aSVenkateswararao Jujjuri (JV) struct file *filp; 6765643135aSVenkateswararao Jujjuri (JV) struct p9_qid qid; 6775643135aSVenkateswararao Jujjuri (JV) struct inode *inode; 6785643135aSVenkateswararao Jujjuri (JV) 6795643135aSVenkateswararao Jujjuri (JV) v9ses = v9fs_inode2v9ses(dir); 6805643135aSVenkateswararao Jujjuri (JV) if (nd && nd->flags & LOOKUP_OPEN) 6815643135aSVenkateswararao Jujjuri (JV) flags = nd->intent.open.flags - 1; 6825643135aSVenkateswararao Jujjuri (JV) else 6835643135aSVenkateswararao Jujjuri (JV) flags = O_RDWR; 6845643135aSVenkateswararao Jujjuri (JV) 6855643135aSVenkateswararao Jujjuri (JV) name = (char *) dentry->d_name.name; 6865643135aSVenkateswararao Jujjuri (JV) P9_DPRINTK(P9_DEBUG_VFS, "v9fs_vfs_create_dotl: name:%s flags:0x%x " 6875643135aSVenkateswararao Jujjuri (JV) "mode:0x%x\n", name, flags, mode); 6885643135aSVenkateswararao Jujjuri (JV) 6895643135aSVenkateswararao Jujjuri (JV) dfid = v9fs_fid_lookup(dentry->d_parent); 6905643135aSVenkateswararao Jujjuri (JV) if (IS_ERR(dfid)) { 6915643135aSVenkateswararao Jujjuri (JV) err = PTR_ERR(dfid); 6925643135aSVenkateswararao Jujjuri (JV) P9_DPRINTK(P9_DEBUG_VFS, "fid lookup failed %d\n", err); 6935643135aSVenkateswararao Jujjuri (JV) return err; 6945643135aSVenkateswararao Jujjuri (JV) } 6955643135aSVenkateswararao Jujjuri (JV) 6965643135aSVenkateswararao Jujjuri (JV) /* clone a fid to use for creation */ 6975643135aSVenkateswararao Jujjuri (JV) ofid = p9_client_walk(dfid, 0, NULL, 1); 6985643135aSVenkateswararao Jujjuri (JV) if (IS_ERR(ofid)) { 6995643135aSVenkateswararao Jujjuri (JV) err = PTR_ERR(ofid); 7005643135aSVenkateswararao Jujjuri (JV) P9_DPRINTK(P9_DEBUG_VFS, "p9_client_walk failed %d\n", err); 7015643135aSVenkateswararao Jujjuri (JV) return err; 7025643135aSVenkateswararao Jujjuri (JV) } 7035643135aSVenkateswararao Jujjuri (JV) 7045643135aSVenkateswararao Jujjuri (JV) gid = v9fs_get_fsgid_for_create(dir); 7055643135aSVenkateswararao Jujjuri (JV) err = p9_client_create_dotl(ofid, name, flags, mode, gid, &qid); 7065643135aSVenkateswararao Jujjuri (JV) if (err < 0) { 7075643135aSVenkateswararao Jujjuri (JV) P9_DPRINTK(P9_DEBUG_VFS, 7085643135aSVenkateswararao Jujjuri (JV) "p9_client_open_dotl failed in creat %d\n", 7095643135aSVenkateswararao Jujjuri (JV) err); 7105643135aSVenkateswararao Jujjuri (JV) goto error; 7115643135aSVenkateswararao Jujjuri (JV) } 7125643135aSVenkateswararao Jujjuri (JV) 7135643135aSVenkateswararao Jujjuri (JV) /* No need to populate the inode if we are not opening the file AND 7145643135aSVenkateswararao Jujjuri (JV) * not in cached mode. 7155643135aSVenkateswararao Jujjuri (JV) */ 7165643135aSVenkateswararao Jujjuri (JV) if (!v9ses->cache && !(nd && nd->flags & LOOKUP_OPEN)) { 7175643135aSVenkateswararao Jujjuri (JV) /* Not in cached mode. No need to populate inode with stat */ 7185643135aSVenkateswararao Jujjuri (JV) dentry->d_op = &v9fs_dentry_operations; 7195643135aSVenkateswararao Jujjuri (JV) p9_client_clunk(ofid); 7205643135aSVenkateswararao Jujjuri (JV) d_instantiate(dentry, NULL); 7215643135aSVenkateswararao Jujjuri (JV) return 0; 7225643135aSVenkateswararao Jujjuri (JV) } 7235643135aSVenkateswararao Jujjuri (JV) 7245643135aSVenkateswararao Jujjuri (JV) /* Now walk from the parent so we can get an unopened fid. */ 7255643135aSVenkateswararao Jujjuri (JV) fid = p9_client_walk(dfid, 1, &name, 1); 7265643135aSVenkateswararao Jujjuri (JV) if (IS_ERR(fid)) { 7275643135aSVenkateswararao Jujjuri (JV) err = PTR_ERR(fid); 7285643135aSVenkateswararao Jujjuri (JV) P9_DPRINTK(P9_DEBUG_VFS, "p9_client_walk failed %d\n", err); 7295643135aSVenkateswararao Jujjuri (JV) fid = NULL; 7305643135aSVenkateswararao Jujjuri (JV) goto error; 7315643135aSVenkateswararao Jujjuri (JV) } 7325643135aSVenkateswararao Jujjuri (JV) 7335643135aSVenkateswararao Jujjuri (JV) /* instantiate inode and assign the unopened fid to dentry */ 7345643135aSVenkateswararao Jujjuri (JV) inode = v9fs_inode_from_fid(v9ses, fid, dir->i_sb); 7355643135aSVenkateswararao Jujjuri (JV) if (IS_ERR(inode)) { 7365643135aSVenkateswararao Jujjuri (JV) err = PTR_ERR(inode); 7375643135aSVenkateswararao Jujjuri (JV) P9_DPRINTK(P9_DEBUG_VFS, "inode creation failed %d\n", err); 7385643135aSVenkateswararao Jujjuri (JV) goto error; 7395643135aSVenkateswararao Jujjuri (JV) } 7403c30750fSAneesh Kumar K.V if (v9ses->cache) 7415643135aSVenkateswararao Jujjuri (JV) dentry->d_op = &v9fs_cached_dentry_operations; 7423c30750fSAneesh Kumar K.V else 7433c30750fSAneesh Kumar K.V dentry->d_op = &v9fs_dentry_operations; 7445643135aSVenkateswararao Jujjuri (JV) d_instantiate(dentry, inode); 7455643135aSVenkateswararao Jujjuri (JV) err = v9fs_fid_add(dentry, fid); 7465643135aSVenkateswararao Jujjuri (JV) if (err < 0) 7475643135aSVenkateswararao Jujjuri (JV) goto error; 7485643135aSVenkateswararao Jujjuri (JV) 7495643135aSVenkateswararao Jujjuri (JV) /* if we are opening a file, assign the open fid to the file */ 7505643135aSVenkateswararao Jujjuri (JV) if (nd && nd->flags & LOOKUP_OPEN) { 7515643135aSVenkateswararao Jujjuri (JV) filp = lookup_instantiate_filp(nd, dentry, v9fs_open_created); 7525643135aSVenkateswararao Jujjuri (JV) if (IS_ERR(filp)) { 7535643135aSVenkateswararao Jujjuri (JV) p9_client_clunk(ofid); 7545643135aSVenkateswararao Jujjuri (JV) return PTR_ERR(filp); 7555643135aSVenkateswararao Jujjuri (JV) } 7565643135aSVenkateswararao Jujjuri (JV) filp->private_data = ofid; 7575643135aSVenkateswararao Jujjuri (JV) } else 7585643135aSVenkateswararao Jujjuri (JV) p9_client_clunk(ofid); 7595643135aSVenkateswararao Jujjuri (JV) 7605643135aSVenkateswararao Jujjuri (JV) return 0; 7615643135aSVenkateswararao Jujjuri (JV) 7625643135aSVenkateswararao Jujjuri (JV) error: 7635643135aSVenkateswararao Jujjuri (JV) if (ofid) 7645643135aSVenkateswararao Jujjuri (JV) p9_client_clunk(ofid); 7655643135aSVenkateswararao Jujjuri (JV) if (fid) 7665643135aSVenkateswararao Jujjuri (JV) p9_client_clunk(fid); 7675643135aSVenkateswararao Jujjuri (JV) return err; 7685643135aSVenkateswararao Jujjuri (JV) } 7695643135aSVenkateswararao Jujjuri (JV) 7705643135aSVenkateswararao Jujjuri (JV) /** 7712bad8471SEric Van Hensbergen * v9fs_vfs_create - VFS hook to create files 772ee443996SEric Van Hensbergen * @dir: directory inode that is being created 7732bad8471SEric Van Hensbergen * @dentry: dentry that is being deleted 7746a3124a3SLatchesar Ionkov * @mode: create permissions 7752bad8471SEric Van Hensbergen * @nd: path information 7762bad8471SEric Van Hensbergen * 7772bad8471SEric Van Hensbergen */ 7782bad8471SEric Van Hensbergen 7792bad8471SEric Van Hensbergen static int 7806a3124a3SLatchesar Ionkov v9fs_vfs_create(struct inode *dir, struct dentry *dentry, int mode, 7812bad8471SEric Van Hensbergen struct nameidata *nd) 7822bad8471SEric Van Hensbergen { 7836a3124a3SLatchesar Ionkov int err; 784bd238fb4SLatchesar Ionkov u32 perm; 7856a3124a3SLatchesar Ionkov int flags; 7866a3124a3SLatchesar Ionkov struct v9fs_session_info *v9ses; 787bd238fb4SLatchesar Ionkov struct p9_fid *fid; 7886a3124a3SLatchesar Ionkov struct file *filp; 7896a3124a3SLatchesar Ionkov 790bd238fb4SLatchesar Ionkov err = 0; 791bd238fb4SLatchesar Ionkov fid = NULL; 7926a3124a3SLatchesar Ionkov v9ses = v9fs_inode2v9ses(dir); 793da977b2cSEric Van Hensbergen perm = unixmode2p9mode(v9ses, mode); 7946a3124a3SLatchesar Ionkov if (nd && nd->flags & LOOKUP_OPEN) 7956a3124a3SLatchesar Ionkov flags = nd->intent.open.flags - 1; 7966a3124a3SLatchesar Ionkov else 7976a3124a3SLatchesar Ionkov flags = O_RDWR; 7986a3124a3SLatchesar Ionkov 799bd238fb4SLatchesar Ionkov fid = v9fs_create(v9ses, dir, dentry, NULL, perm, 800dd6102fbSSripathi Kodi v9fs_uflags2omode(flags, 801dd6102fbSSripathi Kodi v9fs_proto_dotu(v9ses))); 802bd238fb4SLatchesar Ionkov if (IS_ERR(fid)) { 803bd238fb4SLatchesar Ionkov err = PTR_ERR(fid); 804bd238fb4SLatchesar Ionkov fid = NULL; 8056a3124a3SLatchesar Ionkov goto error; 8066a3124a3SLatchesar Ionkov } 8076a3124a3SLatchesar Ionkov 808bd238fb4SLatchesar Ionkov /* if we are opening a file, assign the open fid to the file */ 8096a3124a3SLatchesar Ionkov if (nd && nd->flags & LOOKUP_OPEN) { 8106a3124a3SLatchesar Ionkov filp = lookup_instantiate_filp(nd, dentry, v9fs_open_created); 8116a3124a3SLatchesar Ionkov if (IS_ERR(filp)) { 812bd238fb4SLatchesar Ionkov err = PTR_ERR(filp); 813bd238fb4SLatchesar Ionkov goto error; 8146a3124a3SLatchesar Ionkov } 8156a3124a3SLatchesar Ionkov 816bd238fb4SLatchesar Ionkov filp->private_data = fid; 817bd238fb4SLatchesar Ionkov } else 818bd238fb4SLatchesar Ionkov p9_client_clunk(fid); 8196a3124a3SLatchesar Ionkov 8206a3124a3SLatchesar Ionkov return 0; 8216a3124a3SLatchesar Ionkov 8226a3124a3SLatchesar Ionkov error: 823bd238fb4SLatchesar Ionkov if (fid) 824bd238fb4SLatchesar Ionkov p9_client_clunk(fid); 8256a3124a3SLatchesar Ionkov 8266a3124a3SLatchesar Ionkov return err; 8272bad8471SEric Van Hensbergen } 8282bad8471SEric Van Hensbergen 8292bad8471SEric Van Hensbergen /** 8302bad8471SEric Van Hensbergen * v9fs_vfs_mkdir - VFS mkdir hook to create a directory 831ee443996SEric Van Hensbergen * @dir: inode that is being unlinked 8322bad8471SEric Van Hensbergen * @dentry: dentry that is being unlinked 8332bad8471SEric Van Hensbergen * @mode: mode for new directory 8342bad8471SEric Van Hensbergen * 8352bad8471SEric Van Hensbergen */ 8362bad8471SEric Van Hensbergen 8376a3124a3SLatchesar Ionkov static int v9fs_vfs_mkdir(struct inode *dir, struct dentry *dentry, int mode) 8382bad8471SEric Van Hensbergen { 8396a3124a3SLatchesar Ionkov int err; 840bd238fb4SLatchesar Ionkov u32 perm; 8416a3124a3SLatchesar Ionkov struct v9fs_session_info *v9ses; 842bd238fb4SLatchesar Ionkov struct p9_fid *fid; 8436a3124a3SLatchesar Ionkov 844bd238fb4SLatchesar Ionkov P9_DPRINTK(P9_DEBUG_VFS, "name %s\n", dentry->d_name.name); 845bd238fb4SLatchesar Ionkov err = 0; 8466a3124a3SLatchesar Ionkov v9ses = v9fs_inode2v9ses(dir); 8476a3124a3SLatchesar Ionkov perm = unixmode2p9mode(v9ses, mode | S_IFDIR); 848bd238fb4SLatchesar Ionkov fid = v9fs_create(v9ses, dir, dentry, NULL, perm, P9_OREAD); 849bd238fb4SLatchesar Ionkov if (IS_ERR(fid)) { 850bd238fb4SLatchesar Ionkov err = PTR_ERR(fid); 851bd238fb4SLatchesar Ionkov fid = NULL; 8526a3124a3SLatchesar Ionkov } 8536a3124a3SLatchesar Ionkov 854bd238fb4SLatchesar Ionkov if (fid) 855bd238fb4SLatchesar Ionkov p9_client_clunk(fid); 8566a3124a3SLatchesar Ionkov 8576a3124a3SLatchesar Ionkov return err; 8582bad8471SEric Van Hensbergen } 8592bad8471SEric Van Hensbergen 86001a622bdSM. Mohan Kumar 86101a622bdSM. Mohan Kumar /** 86201a622bdSM. Mohan Kumar * v9fs_vfs_mkdir_dotl - VFS mkdir hook to create a directory 86301a622bdSM. Mohan Kumar * @dir: inode that is being unlinked 86401a622bdSM. Mohan Kumar * @dentry: dentry that is being unlinked 86501a622bdSM. Mohan Kumar * @mode: mode for new directory 86601a622bdSM. Mohan Kumar * 86701a622bdSM. Mohan Kumar */ 86801a622bdSM. Mohan Kumar 86901a622bdSM. Mohan Kumar static int v9fs_vfs_mkdir_dotl(struct inode *dir, struct dentry *dentry, 87001a622bdSM. Mohan Kumar int mode) 87101a622bdSM. Mohan Kumar { 87201a622bdSM. Mohan Kumar int err; 87301a622bdSM. Mohan Kumar struct v9fs_session_info *v9ses; 87401a622bdSM. Mohan Kumar struct p9_fid *fid = NULL, *dfid = NULL; 87501a622bdSM. Mohan Kumar gid_t gid; 87601a622bdSM. Mohan Kumar char *name; 87701a622bdSM. Mohan Kumar struct inode *inode; 87801a622bdSM. Mohan Kumar struct p9_qid qid; 87901a622bdSM. Mohan Kumar struct dentry *dir_dentry; 88001a622bdSM. Mohan Kumar 88101a622bdSM. Mohan Kumar P9_DPRINTK(P9_DEBUG_VFS, "name %s\n", dentry->d_name.name); 88201a622bdSM. Mohan Kumar err = 0; 88301a622bdSM. Mohan Kumar v9ses = v9fs_inode2v9ses(dir); 88401a622bdSM. Mohan Kumar 88501a622bdSM. Mohan Kumar mode |= S_IFDIR; 8867c7298cfSHarsh Prateek Bora if (dir->i_mode & S_ISGID) 8877c7298cfSHarsh Prateek Bora mode |= S_ISGID; 88801a622bdSM. Mohan Kumar dir_dentry = v9fs_dentry_from_dir_inode(dir); 88901a622bdSM. Mohan Kumar dfid = v9fs_fid_lookup(dir_dentry); 89001a622bdSM. Mohan Kumar if (IS_ERR(dfid)) { 89101a622bdSM. Mohan Kumar err = PTR_ERR(dfid); 89201a622bdSM. Mohan Kumar P9_DPRINTK(P9_DEBUG_VFS, "fid lookup failed %d\n", err); 89301a622bdSM. Mohan Kumar dfid = NULL; 89401a622bdSM. Mohan Kumar goto error; 89501a622bdSM. Mohan Kumar } 89601a622bdSM. Mohan Kumar 89701a622bdSM. Mohan Kumar gid = v9fs_get_fsgid_for_create(dir); 89801a622bdSM. Mohan Kumar 89901a622bdSM. Mohan Kumar name = (char *) dentry->d_name.name; 90001a622bdSM. Mohan Kumar err = p9_client_mkdir_dotl(dfid, name, mode, gid, &qid); 90101a622bdSM. Mohan Kumar if (err < 0) 90201a622bdSM. Mohan Kumar goto error; 90301a622bdSM. Mohan Kumar 90401a622bdSM. Mohan Kumar /* instantiate inode and assign the unopened fid to the dentry */ 90501a622bdSM. Mohan Kumar if (v9ses->cache == CACHE_LOOSE || v9ses->cache == CACHE_FSCACHE) { 90601a622bdSM. Mohan Kumar fid = p9_client_walk(dfid, 1, &name, 1); 90701a622bdSM. Mohan Kumar if (IS_ERR(fid)) { 90801a622bdSM. Mohan Kumar err = PTR_ERR(fid); 90901a622bdSM. Mohan Kumar P9_DPRINTK(P9_DEBUG_VFS, "p9_client_walk failed %d\n", 91001a622bdSM. Mohan Kumar err); 91101a622bdSM. Mohan Kumar fid = NULL; 91201a622bdSM. Mohan Kumar goto error; 91301a622bdSM. Mohan Kumar } 91401a622bdSM. Mohan Kumar 91501a622bdSM. Mohan Kumar inode = v9fs_inode_from_fid(v9ses, fid, dir->i_sb); 91601a622bdSM. Mohan Kumar if (IS_ERR(inode)) { 91701a622bdSM. Mohan Kumar err = PTR_ERR(inode); 91801a622bdSM. Mohan Kumar P9_DPRINTK(P9_DEBUG_VFS, "inode creation failed %d\n", 91901a622bdSM. Mohan Kumar err); 92001a622bdSM. Mohan Kumar goto error; 92101a622bdSM. Mohan Kumar } 92201a622bdSM. Mohan Kumar dentry->d_op = &v9fs_cached_dentry_operations; 92301a622bdSM. Mohan Kumar d_instantiate(dentry, inode); 92401a622bdSM. Mohan Kumar err = v9fs_fid_add(dentry, fid); 92501a622bdSM. Mohan Kumar if (err < 0) 92601a622bdSM. Mohan Kumar goto error; 92701a622bdSM. Mohan Kumar fid = NULL; 92801a622bdSM. Mohan Kumar } 92901a622bdSM. Mohan Kumar error: 93001a622bdSM. Mohan Kumar if (fid) 93101a622bdSM. Mohan Kumar p9_client_clunk(fid); 93201a622bdSM. Mohan Kumar return err; 93301a622bdSM. Mohan Kumar } 93401a622bdSM. Mohan Kumar 9352bad8471SEric Van Hensbergen /** 9362bad8471SEric Van Hensbergen * v9fs_vfs_lookup - VFS lookup hook to "walk" to a new inode 9372bad8471SEric Van Hensbergen * @dir: inode that is being walked from 9382bad8471SEric Van Hensbergen * @dentry: dentry that is being walked to? 9392bad8471SEric Van Hensbergen * @nameidata: path data 9402bad8471SEric Van Hensbergen * 9412bad8471SEric Van Hensbergen */ 9422bad8471SEric Van Hensbergen 9432bad8471SEric Van Hensbergen static struct dentry *v9fs_vfs_lookup(struct inode *dir, struct dentry *dentry, 9442bad8471SEric Van Hensbergen struct nameidata *nameidata) 9452bad8471SEric Van Hensbergen { 9462bad8471SEric Van Hensbergen struct super_block *sb; 9472bad8471SEric Van Hensbergen struct v9fs_session_info *v9ses; 948bd238fb4SLatchesar Ionkov struct p9_fid *dfid, *fid; 9492bad8471SEric Van Hensbergen struct inode *inode; 950bd238fb4SLatchesar Ionkov char *name; 9512bad8471SEric Van Hensbergen int result = 0; 9522bad8471SEric Van Hensbergen 953bd238fb4SLatchesar Ionkov P9_DPRINTK(P9_DEBUG_VFS, "dir: %p dentry: (%s) %p nameidata: %p\n", 954731805b4SLatchesar Ionkov dir, dentry->d_name.name, dentry, nameidata); 9552bad8471SEric Van Hensbergen 95611e9b49bSSripathi Kodi if (dentry->d_name.len > NAME_MAX) 95711e9b49bSSripathi Kodi return ERR_PTR(-ENAMETOOLONG); 95811e9b49bSSripathi Kodi 9592bad8471SEric Van Hensbergen sb = dir->i_sb; 9602bad8471SEric Van Hensbergen v9ses = v9fs_inode2v9ses(dir); 961a534c8d1SAneesh Kumar K.V /* We can walk d_parent because we hold the dir->i_mutex */ 962bd238fb4SLatchesar Ionkov dfid = v9fs_fid_lookup(dentry->d_parent); 963bd238fb4SLatchesar Ionkov if (IS_ERR(dfid)) 964e231c2eeSDavid Howells return ERR_CAST(dfid); 9652bad8471SEric Van Hensbergen 966bd238fb4SLatchesar Ionkov name = (char *) dentry->d_name.name; 967bd238fb4SLatchesar Ionkov fid = p9_client_walk(dfid, 1, &name, 1); 968bd238fb4SLatchesar Ionkov if (IS_ERR(fid)) { 969bd238fb4SLatchesar Ionkov result = PTR_ERR(fid); 9702bad8471SEric Van Hensbergen if (result == -ENOENT) { 97185e0df24SAneesh Kumar K.V inode = NULL; 97285e0df24SAneesh Kumar K.V goto inst_out; 9732bad8471SEric Van Hensbergen } 9742bad8471SEric Van Hensbergen 975bd238fb4SLatchesar Ionkov return ERR_PTR(result); 9762bad8471SEric Van Hensbergen } 9772bad8471SEric Van Hensbergen 978bd238fb4SLatchesar Ionkov inode = v9fs_inode_from_fid(v9ses, fid, dir->i_sb); 979bd238fb4SLatchesar Ionkov if (IS_ERR(inode)) { 980bd238fb4SLatchesar Ionkov result = PTR_ERR(inode); 981bd238fb4SLatchesar Ionkov inode = NULL; 982bd238fb4SLatchesar Ionkov goto error; 9832bad8471SEric Van Hensbergen } 9842bad8471SEric Van Hensbergen 985bd238fb4SLatchesar Ionkov result = v9fs_fid_add(dentry, fid); 9866a3124a3SLatchesar Ionkov if (result < 0) 987bd238fb4SLatchesar Ionkov goto error; 9886a3124a3SLatchesar Ionkov 98985e0df24SAneesh Kumar K.V inst_out: 99085e0df24SAneesh Kumar K.V if (v9ses->cache) 991e03abc0cSEric Van Hensbergen dentry->d_op = &v9fs_cached_dentry_operations; 992e03abc0cSEric Van Hensbergen else 993e03abc0cSEric Van Hensbergen dentry->d_op = &v9fs_dentry_operations; 9942bad8471SEric Van Hensbergen 9952bad8471SEric Van Hensbergen d_add(dentry, inode); 9962bad8471SEric Van Hensbergen return NULL; 9972bad8471SEric Van Hensbergen 998bd238fb4SLatchesar Ionkov error: 999bd238fb4SLatchesar Ionkov p9_client_clunk(fid); 1000da977b2cSEric Van Hensbergen 10012bad8471SEric Van Hensbergen return ERR_PTR(result); 10022bad8471SEric Van Hensbergen } 10032bad8471SEric Van Hensbergen 10042bad8471SEric Van Hensbergen /** 10052bad8471SEric Van Hensbergen * v9fs_vfs_unlink - VFS unlink hook to delete an inode 10062bad8471SEric Van Hensbergen * @i: inode that is being unlinked 100773c592b9SEric Van Hensbergen * @d: dentry that is being unlinked 10082bad8471SEric Van Hensbergen * 10092bad8471SEric Van Hensbergen */ 10102bad8471SEric Van Hensbergen 10112bad8471SEric Van Hensbergen static int v9fs_vfs_unlink(struct inode *i, struct dentry *d) 10122bad8471SEric Van Hensbergen { 10132bad8471SEric Van Hensbergen return v9fs_remove(i, d, 0); 10142bad8471SEric Van Hensbergen } 10152bad8471SEric Van Hensbergen 10162bad8471SEric Van Hensbergen /** 10172bad8471SEric Van Hensbergen * v9fs_vfs_rmdir - VFS unlink hook to delete a directory 10182bad8471SEric Van Hensbergen * @i: inode that is being unlinked 101973c592b9SEric Van Hensbergen * @d: dentry that is being unlinked 10202bad8471SEric Van Hensbergen * 10212bad8471SEric Van Hensbergen */ 10222bad8471SEric Van Hensbergen 10232bad8471SEric Van Hensbergen static int v9fs_vfs_rmdir(struct inode *i, struct dentry *d) 10242bad8471SEric Van Hensbergen { 10252bad8471SEric Van Hensbergen return v9fs_remove(i, d, 1); 10262bad8471SEric Van Hensbergen } 10272bad8471SEric Van Hensbergen 10282bad8471SEric Van Hensbergen /** 10292bad8471SEric Van Hensbergen * v9fs_vfs_rename - VFS hook to rename an inode 10302bad8471SEric Van Hensbergen * @old_dir: old dir inode 10312bad8471SEric Van Hensbergen * @old_dentry: old dentry 10322bad8471SEric Van Hensbergen * @new_dir: new dir inode 10332bad8471SEric Van Hensbergen * @new_dentry: new dentry 10342bad8471SEric Van Hensbergen * 10352bad8471SEric Van Hensbergen */ 10362bad8471SEric Van Hensbergen 10372bad8471SEric Van Hensbergen static int 10382bad8471SEric Van Hensbergen v9fs_vfs_rename(struct inode *old_dir, struct dentry *old_dentry, 10392bad8471SEric Van Hensbergen struct inode *new_dir, struct dentry *new_dentry) 10402bad8471SEric Van Hensbergen { 1041bd238fb4SLatchesar Ionkov struct inode *old_inode; 1042bd238fb4SLatchesar Ionkov struct v9fs_session_info *v9ses; 1043bd238fb4SLatchesar Ionkov struct p9_fid *oldfid; 1044bd238fb4SLatchesar Ionkov struct p9_fid *olddirfid; 1045bd238fb4SLatchesar Ionkov struct p9_fid *newdirfid; 1046bd238fb4SLatchesar Ionkov struct p9_wstat wstat; 1047bd238fb4SLatchesar Ionkov int retval; 10482bad8471SEric Van Hensbergen 1049bd238fb4SLatchesar Ionkov P9_DPRINTK(P9_DEBUG_VFS, "\n"); 1050bd238fb4SLatchesar Ionkov retval = 0; 1051bd238fb4SLatchesar Ionkov old_inode = old_dentry->d_inode; 1052bd238fb4SLatchesar Ionkov v9ses = v9fs_inode2v9ses(old_inode); 1053bd238fb4SLatchesar Ionkov oldfid = v9fs_fid_lookup(old_dentry); 1054da977b2cSEric Van Hensbergen if (IS_ERR(oldfid)) 1055da977b2cSEric Van Hensbergen return PTR_ERR(oldfid); 1056da977b2cSEric Van Hensbergen 1057da977b2cSEric Van Hensbergen olddirfid = v9fs_fid_clone(old_dentry->d_parent); 1058da977b2cSEric Van Hensbergen if (IS_ERR(olddirfid)) { 1059da977b2cSEric Van Hensbergen retval = PTR_ERR(olddirfid); 1060bd238fb4SLatchesar Ionkov goto done; 1061da977b2cSEric Van Hensbergen } 1062da977b2cSEric Van Hensbergen 1063da977b2cSEric Van Hensbergen newdirfid = v9fs_fid_clone(new_dentry->d_parent); 1064da977b2cSEric Van Hensbergen if (IS_ERR(newdirfid)) { 1065da977b2cSEric Van Hensbergen retval = PTR_ERR(newdirfid); 1066bd238fb4SLatchesar Ionkov goto clunk_olddir; 10672bad8471SEric Van Hensbergen } 10682bad8471SEric Van Hensbergen 1069a534c8d1SAneesh Kumar K.V down_write(&v9ses->rename_sem); 10704681dbdaSSripathi Kodi if (v9fs_proto_dotl(v9ses)) { 10714681dbdaSSripathi Kodi retval = p9_client_rename(oldfid, newdirfid, 10724681dbdaSSripathi Kodi (char *) new_dentry->d_name.name); 10734681dbdaSSripathi Kodi if (retval != -ENOSYS) 10744681dbdaSSripathi Kodi goto clunk_newdir; 10754681dbdaSSripathi Kodi } 1076a534c8d1SAneesh Kumar K.V if (old_dentry->d_parent != new_dentry->d_parent) { 1077a534c8d1SAneesh Kumar K.V /* 1078a534c8d1SAneesh Kumar K.V * 9P .u can only handle file rename in the same directory 1079a534c8d1SAneesh Kumar K.V */ 10804681dbdaSSripathi Kodi 1081bd238fb4SLatchesar Ionkov P9_DPRINTK(P9_DEBUG_ERROR, 1082bd238fb4SLatchesar Ionkov "old dir and new dir are different\n"); 1083621997cdSEric Van Hensbergen retval = -EXDEV; 1084bd238fb4SLatchesar Ionkov goto clunk_newdir; 10852bad8471SEric Van Hensbergen } 1086531b1094SLatchesar Ionkov v9fs_blank_wstat(&wstat); 1087ba17674fSLatchesar Ionkov wstat.muid = v9ses->uname; 1088531b1094SLatchesar Ionkov wstat.name = (char *) new_dentry->d_name.name; 1089bd238fb4SLatchesar Ionkov retval = p9_client_wstat(oldfid, &wstat); 10902bad8471SEric Van Hensbergen 1091bd238fb4SLatchesar Ionkov clunk_newdir: 1092a534c8d1SAneesh Kumar K.V if (!retval) 1093a534c8d1SAneesh Kumar K.V /* successful rename */ 1094a534c8d1SAneesh Kumar K.V d_move(old_dentry, new_dentry); 1095a534c8d1SAneesh Kumar K.V up_write(&v9ses->rename_sem); 109622150c4fSLatchesar Ionkov p9_client_clunk(newdirfid); 10972bad8471SEric Van Hensbergen 1098bd238fb4SLatchesar Ionkov clunk_olddir: 109922150c4fSLatchesar Ionkov p9_client_clunk(olddirfid); 11002bad8471SEric Van Hensbergen 1101bd238fb4SLatchesar Ionkov done: 11022bad8471SEric Van Hensbergen return retval; 11032bad8471SEric Van Hensbergen } 11042bad8471SEric Van Hensbergen 11052bad8471SEric Van Hensbergen /** 1106943ffb58SAdrian Bunk * v9fs_vfs_getattr - retrieve file metadata 1107ee443996SEric Van Hensbergen * @mnt: mount information 1108ee443996SEric Van Hensbergen * @dentry: file to get attributes on 1109ee443996SEric Van Hensbergen * @stat: metadata structure to populate 11102bad8471SEric Van Hensbergen * 11112bad8471SEric Van Hensbergen */ 11122bad8471SEric Van Hensbergen 11132bad8471SEric Van Hensbergen static int 11142bad8471SEric Van Hensbergen v9fs_vfs_getattr(struct vfsmount *mnt, struct dentry *dentry, 11152bad8471SEric Van Hensbergen struct kstat *stat) 11162bad8471SEric Van Hensbergen { 1117bd238fb4SLatchesar Ionkov int err; 1118bd238fb4SLatchesar Ionkov struct v9fs_session_info *v9ses; 1119bd238fb4SLatchesar Ionkov struct p9_fid *fid; 112051a87c55SEric Van Hensbergen struct p9_wstat *st; 11212bad8471SEric Van Hensbergen 1122bd238fb4SLatchesar Ionkov P9_DPRINTK(P9_DEBUG_VFS, "dentry: %p\n", dentry); 1123bd238fb4SLatchesar Ionkov err = -EPERM; 1124bd238fb4SLatchesar Ionkov v9ses = v9fs_inode2v9ses(dentry->d_inode); 112560e78d2cSAbhishek Kulkarni if (v9ses->cache == CACHE_LOOSE || v9ses->cache == CACHE_FSCACHE) 11269523a841SEric Van Hensbergen return simple_getattr(mnt, dentry, stat); 11279523a841SEric Van Hensbergen 1128bd238fb4SLatchesar Ionkov fid = v9fs_fid_lookup(dentry); 1129da977b2cSEric Van Hensbergen if (IS_ERR(fid)) 1130da977b2cSEric Van Hensbergen return PTR_ERR(fid); 11312bad8471SEric Van Hensbergen 1132bd238fb4SLatchesar Ionkov st = p9_client_stat(fid); 1133bd238fb4SLatchesar Ionkov if (IS_ERR(st)) 1134bd238fb4SLatchesar Ionkov return PTR_ERR(st); 11352bad8471SEric Van Hensbergen 1136bd238fb4SLatchesar Ionkov v9fs_stat2inode(st, dentry->d_inode, dentry->d_inode->i_sb); 11372bad8471SEric Van Hensbergen generic_fillattr(dentry->d_inode, stat); 11382bad8471SEric Van Hensbergen 113962b2be59SLatchesar Ionkov p9stat_free(st); 1140bd238fb4SLatchesar Ionkov kfree(st); 1141bd238fb4SLatchesar Ionkov return 0; 11422bad8471SEric Van Hensbergen } 11432bad8471SEric Van Hensbergen 1144f0853122SSripathi Kodi static int 1145f0853122SSripathi Kodi v9fs_vfs_getattr_dotl(struct vfsmount *mnt, struct dentry *dentry, 1146f0853122SSripathi Kodi struct kstat *stat) 1147f0853122SSripathi Kodi { 1148f0853122SSripathi Kodi int err; 1149f0853122SSripathi Kodi struct v9fs_session_info *v9ses; 1150f0853122SSripathi Kodi struct p9_fid *fid; 1151f0853122SSripathi Kodi struct p9_stat_dotl *st; 1152f0853122SSripathi Kodi 1153f0853122SSripathi Kodi P9_DPRINTK(P9_DEBUG_VFS, "dentry: %p\n", dentry); 1154f0853122SSripathi Kodi err = -EPERM; 1155f0853122SSripathi Kodi v9ses = v9fs_inode2v9ses(dentry->d_inode); 1156f0853122SSripathi Kodi if (v9ses->cache == CACHE_LOOSE || v9ses->cache == CACHE_FSCACHE) 1157f0853122SSripathi Kodi return simple_getattr(mnt, dentry, stat); 1158f0853122SSripathi Kodi 1159f0853122SSripathi Kodi fid = v9fs_fid_lookup(dentry); 1160f0853122SSripathi Kodi if (IS_ERR(fid)) 1161f0853122SSripathi Kodi return PTR_ERR(fid); 1162f0853122SSripathi Kodi 1163f0853122SSripathi Kodi /* Ask for all the fields in stat structure. Server will return 1164f0853122SSripathi Kodi * whatever it supports 1165f0853122SSripathi Kodi */ 1166f0853122SSripathi Kodi 1167f0853122SSripathi Kodi st = p9_client_getattr_dotl(fid, P9_STATS_ALL); 1168f0853122SSripathi Kodi if (IS_ERR(st)) 1169f0853122SSripathi Kodi return PTR_ERR(st); 1170f0853122SSripathi Kodi 1171f0853122SSripathi Kodi v9fs_stat2inode_dotl(st, dentry->d_inode); 1172f0853122SSripathi Kodi generic_fillattr(dentry->d_inode, stat); 1173f0853122SSripathi Kodi /* Change block size to what the server returned */ 1174f0853122SSripathi Kodi stat->blksize = st->st_blksize; 1175f0853122SSripathi Kodi 1176f0853122SSripathi Kodi kfree(st); 1177f0853122SSripathi Kodi return 0; 1178f0853122SSripathi Kodi } 1179f0853122SSripathi Kodi 11802bad8471SEric Van Hensbergen /** 11812bad8471SEric Van Hensbergen * v9fs_vfs_setattr - set file metadata 11822bad8471SEric Van Hensbergen * @dentry: file whose metadata to set 11832bad8471SEric Van Hensbergen * @iattr: metadata assignment structure 11842bad8471SEric Van Hensbergen * 11852bad8471SEric Van Hensbergen */ 11862bad8471SEric Van Hensbergen 11872bad8471SEric Van Hensbergen static int v9fs_vfs_setattr(struct dentry *dentry, struct iattr *iattr) 11882bad8471SEric Van Hensbergen { 1189bd238fb4SLatchesar Ionkov int retval; 1190bd238fb4SLatchesar Ionkov struct v9fs_session_info *v9ses; 1191bd238fb4SLatchesar Ionkov struct p9_fid *fid; 1192bd238fb4SLatchesar Ionkov struct p9_wstat wstat; 11932bad8471SEric Van Hensbergen 1194bd238fb4SLatchesar Ionkov P9_DPRINTK(P9_DEBUG_VFS, "\n"); 1195bd238fb4SLatchesar Ionkov retval = -EPERM; 1196bd238fb4SLatchesar Ionkov v9ses = v9fs_inode2v9ses(dentry->d_inode); 1197bd238fb4SLatchesar Ionkov fid = v9fs_fid_lookup(dentry); 1198da977b2cSEric Van Hensbergen if(IS_ERR(fid)) 1199da977b2cSEric Van Hensbergen return PTR_ERR(fid); 12002bad8471SEric Van Hensbergen 1201531b1094SLatchesar Ionkov v9fs_blank_wstat(&wstat); 12022bad8471SEric Van Hensbergen if (iattr->ia_valid & ATTR_MODE) 1203531b1094SLatchesar Ionkov wstat.mode = unixmode2p9mode(v9ses, iattr->ia_mode); 12042bad8471SEric Van Hensbergen 12052bad8471SEric Van Hensbergen if (iattr->ia_valid & ATTR_MTIME) 1206531b1094SLatchesar Ionkov wstat.mtime = iattr->ia_mtime.tv_sec; 12072bad8471SEric Van Hensbergen 12082bad8471SEric Van Hensbergen if (iattr->ia_valid & ATTR_ATIME) 1209531b1094SLatchesar Ionkov wstat.atime = iattr->ia_atime.tv_sec; 12102bad8471SEric Van Hensbergen 12112bad8471SEric Van Hensbergen if (iattr->ia_valid & ATTR_SIZE) 1212531b1094SLatchesar Ionkov wstat.length = iattr->ia_size; 12132bad8471SEric Van Hensbergen 1214dd6102fbSSripathi Kodi if (v9fs_proto_dotu(v9ses)) { 1215531b1094SLatchesar Ionkov if (iattr->ia_valid & ATTR_UID) 1216531b1094SLatchesar Ionkov wstat.n_uid = iattr->ia_uid; 12172bad8471SEric Van Hensbergen 1218531b1094SLatchesar Ionkov if (iattr->ia_valid & ATTR_GID) 1219531b1094SLatchesar Ionkov wstat.n_gid = iattr->ia_gid; 12202bad8471SEric Van Hensbergen } 12212bad8471SEric Van Hensbergen 1222bd238fb4SLatchesar Ionkov retval = p9_client_wstat(fid, &wstat); 12231025774cSChristoph Hellwig if (retval < 0) 1224bd238fb4SLatchesar Ionkov return retval; 12251025774cSChristoph Hellwig 12261025774cSChristoph Hellwig if ((iattr->ia_valid & ATTR_SIZE) && 12271025774cSChristoph Hellwig iattr->ia_size != i_size_read(dentry->d_inode)) { 12281025774cSChristoph Hellwig retval = vmtruncate(dentry->d_inode, iattr->ia_size); 12291025774cSChristoph Hellwig if (retval) 12301025774cSChristoph Hellwig return retval; 12311025774cSChristoph Hellwig } 12321025774cSChristoph Hellwig 12331025774cSChristoph Hellwig setattr_copy(dentry->d_inode, iattr); 12341025774cSChristoph Hellwig mark_inode_dirty(dentry->d_inode); 12351025774cSChristoph Hellwig return 0; 12362bad8471SEric Van Hensbergen } 12372bad8471SEric Van Hensbergen 12382bad8471SEric Van Hensbergen /** 123987d7845aSSripathi Kodi * v9fs_vfs_setattr_dotl - set file metadata 124087d7845aSSripathi Kodi * @dentry: file whose metadata to set 124187d7845aSSripathi Kodi * @iattr: metadata assignment structure 124287d7845aSSripathi Kodi * 124387d7845aSSripathi Kodi */ 124487d7845aSSripathi Kodi 124587d7845aSSripathi Kodi static int v9fs_vfs_setattr_dotl(struct dentry *dentry, struct iattr *iattr) 124687d7845aSSripathi Kodi { 124787d7845aSSripathi Kodi int retval; 124887d7845aSSripathi Kodi struct v9fs_session_info *v9ses; 124987d7845aSSripathi Kodi struct p9_fid *fid; 125087d7845aSSripathi Kodi struct p9_iattr_dotl p9attr; 125187d7845aSSripathi Kodi 125287d7845aSSripathi Kodi P9_DPRINTK(P9_DEBUG_VFS, "\n"); 125387d7845aSSripathi Kodi 125487d7845aSSripathi Kodi retval = inode_change_ok(dentry->d_inode, iattr); 125587d7845aSSripathi Kodi if (retval) 125687d7845aSSripathi Kodi return retval; 125787d7845aSSripathi Kodi 125887d7845aSSripathi Kodi p9attr.valid = iattr->ia_valid; 125987d7845aSSripathi Kodi p9attr.mode = iattr->ia_mode; 126087d7845aSSripathi Kodi p9attr.uid = iattr->ia_uid; 126187d7845aSSripathi Kodi p9attr.gid = iattr->ia_gid; 126287d7845aSSripathi Kodi p9attr.size = iattr->ia_size; 126387d7845aSSripathi Kodi p9attr.atime_sec = iattr->ia_atime.tv_sec; 126487d7845aSSripathi Kodi p9attr.atime_nsec = iattr->ia_atime.tv_nsec; 126587d7845aSSripathi Kodi p9attr.mtime_sec = iattr->ia_mtime.tv_sec; 126687d7845aSSripathi Kodi p9attr.mtime_nsec = iattr->ia_mtime.tv_nsec; 126787d7845aSSripathi Kodi 126887d7845aSSripathi Kodi retval = -EPERM; 126987d7845aSSripathi Kodi v9ses = v9fs_inode2v9ses(dentry->d_inode); 127087d7845aSSripathi Kodi fid = v9fs_fid_lookup(dentry); 127187d7845aSSripathi Kodi if (IS_ERR(fid)) 127287d7845aSSripathi Kodi return PTR_ERR(fid); 127387d7845aSSripathi Kodi 127487d7845aSSripathi Kodi retval = p9_client_setattr(fid, &p9attr); 12758cef9c67SStephen Rothwell if (retval < 0) 127687d7845aSSripathi Kodi return retval; 12778cef9c67SStephen Rothwell 12788cef9c67SStephen Rothwell if ((iattr->ia_valid & ATTR_SIZE) && 12798cef9c67SStephen Rothwell iattr->ia_size != i_size_read(dentry->d_inode)) { 12808cef9c67SStephen Rothwell retval = vmtruncate(dentry->d_inode, iattr->ia_size); 12818cef9c67SStephen Rothwell if (retval) 12828cef9c67SStephen Rothwell return retval; 12838cef9c67SStephen Rothwell } 12848cef9c67SStephen Rothwell 12858cef9c67SStephen Rothwell setattr_copy(dentry->d_inode, iattr); 12868cef9c67SStephen Rothwell mark_inode_dirty(dentry->d_inode); 12878cef9c67SStephen Rothwell return 0; 128887d7845aSSripathi Kodi } 128987d7845aSSripathi Kodi 129087d7845aSSripathi Kodi /** 1291531b1094SLatchesar Ionkov * v9fs_stat2inode - populate an inode structure with mistat info 1292531b1094SLatchesar Ionkov * @stat: Plan 9 metadata (mistat) structure 12932bad8471SEric Van Hensbergen * @inode: inode to populate 12942bad8471SEric Van Hensbergen * @sb: superblock of filesystem 12952bad8471SEric Van Hensbergen * 12962bad8471SEric Van Hensbergen */ 12972bad8471SEric Van Hensbergen 12982bad8471SEric Van Hensbergen void 129951a87c55SEric Van Hensbergen v9fs_stat2inode(struct p9_wstat *stat, struct inode *inode, 13002bad8471SEric Van Hensbergen struct super_block *sb) 13012bad8471SEric Van Hensbergen { 1302531b1094SLatchesar Ionkov char ext[32]; 13035717144aSAneesh Kumar K.V char tag_name[14]; 13045717144aSAneesh Kumar K.V unsigned int i_nlink; 13052bad8471SEric Van Hensbergen struct v9fs_session_info *v9ses = sb->s_fs_info; 13062bad8471SEric Van Hensbergen 13072bad8471SEric Van Hensbergen inode->i_nlink = 1; 13082bad8471SEric Van Hensbergen 1309531b1094SLatchesar Ionkov inode->i_atime.tv_sec = stat->atime; 1310531b1094SLatchesar Ionkov inode->i_mtime.tv_sec = stat->mtime; 1311531b1094SLatchesar Ionkov inode->i_ctime.tv_sec = stat->mtime; 13122bad8471SEric Van Hensbergen 1313bd32b82dSLatchesar Ionkov inode->i_uid = v9ses->dfltuid; 1314bd32b82dSLatchesar Ionkov inode->i_gid = v9ses->dfltgid; 13152bad8471SEric Van Hensbergen 1316dd6102fbSSripathi Kodi if (v9fs_proto_dotu(v9ses)) { 1317531b1094SLatchesar Ionkov inode->i_uid = stat->n_uid; 1318531b1094SLatchesar Ionkov inode->i_gid = stat->n_gid; 1319531b1094SLatchesar Ionkov } 13205717144aSAneesh Kumar K.V if ((S_ISREG(inode->i_mode)) || (S_ISDIR(inode->i_mode))) { 13215717144aSAneesh Kumar K.V if (v9fs_proto_dotu(v9ses) && (stat->extension[0] != '\0')) { 13225717144aSAneesh Kumar K.V /* 13235717144aSAneesh Kumar K.V * Hadlink support got added later to 13245717144aSAneesh Kumar K.V * to the .u extension. So there can be 13255717144aSAneesh Kumar K.V * server out there that doesn't support 13265717144aSAneesh Kumar K.V * this even with .u extension. So check 13275717144aSAneesh Kumar K.V * for non NULL stat->extension 13285717144aSAneesh Kumar K.V */ 13295717144aSAneesh Kumar K.V strncpy(ext, stat->extension, sizeof(ext)); 13305717144aSAneesh Kumar K.V /* HARDLINKCOUNT %u */ 13315717144aSAneesh Kumar K.V sscanf(ext, "%13s %u", tag_name, &i_nlink); 13325717144aSAneesh Kumar K.V if (!strncmp(tag_name, "HARDLINKCOUNT", 13)) 13335717144aSAneesh Kumar K.V inode->i_nlink = i_nlink; 13345717144aSAneesh Kumar K.V } 13355717144aSAneesh Kumar K.V } 1336531b1094SLatchesar Ionkov inode->i_mode = p9mode2unixmode(v9ses, stat->mode); 13372bad8471SEric Van Hensbergen if ((S_ISBLK(inode->i_mode)) || (S_ISCHR(inode->i_mode))) { 13382bad8471SEric Van Hensbergen char type = 0; 13392bad8471SEric Van Hensbergen int major = -1; 13402bad8471SEric Van Hensbergen int minor = -1; 1341531b1094SLatchesar Ionkov 134251a87c55SEric Van Hensbergen strncpy(ext, stat->extension, sizeof(ext)); 1343531b1094SLatchesar Ionkov sscanf(ext, "%c %u %u", &type, &major, &minor); 13442bad8471SEric Van Hensbergen switch (type) { 13452bad8471SEric Van Hensbergen case 'c': 13462bad8471SEric Van Hensbergen inode->i_mode &= ~S_IFBLK; 13472bad8471SEric Van Hensbergen inode->i_mode |= S_IFCHR; 13482bad8471SEric Van Hensbergen break; 13492bad8471SEric Van Hensbergen case 'b': 13502bad8471SEric Van Hensbergen break; 13512bad8471SEric Van Hensbergen default: 1352bd238fb4SLatchesar Ionkov P9_DPRINTK(P9_DEBUG_ERROR, 135351a87c55SEric Van Hensbergen "Unknown special type %c %s\n", type, 135451a87c55SEric Van Hensbergen stat->extension); 13552bad8471SEric Van Hensbergen }; 13562bad8471SEric Van Hensbergen inode->i_rdev = MKDEV(major, minor); 135757c7b4e6SMagnus Deininger init_special_inode(inode, inode->i_mode, inode->i_rdev); 13582bad8471SEric Van Hensbergen } else 13592bad8471SEric Van Hensbergen inode->i_rdev = 0; 13602bad8471SEric Van Hensbergen 13617549ae3eSAbhishek Kulkarni i_size_write(inode, stat->length); 13622bad8471SEric Van Hensbergen 1363bd238fb4SLatchesar Ionkov /* not real number of blocks, but 512 byte ones ... */ 13647549ae3eSAbhishek Kulkarni inode->i_blocks = (i_size_read(inode) + 512 - 1) >> 9; 13652bad8471SEric Van Hensbergen } 13662bad8471SEric Van Hensbergen 13672bad8471SEric Van Hensbergen /** 1368f0853122SSripathi Kodi * v9fs_stat2inode_dotl - populate an inode structure with stat info 1369f0853122SSripathi Kodi * @stat: stat structure 1370f0853122SSripathi Kodi * @inode: inode to populate 1371f0853122SSripathi Kodi * @sb: superblock of filesystem 1372f0853122SSripathi Kodi * 1373f0853122SSripathi Kodi */ 1374f0853122SSripathi Kodi 1375f0853122SSripathi Kodi void 1376f0853122SSripathi Kodi v9fs_stat2inode_dotl(struct p9_stat_dotl *stat, struct inode *inode) 1377f0853122SSripathi Kodi { 1378f0853122SSripathi Kodi 1379f0853122SSripathi Kodi if ((stat->st_result_mask & P9_STATS_BASIC) == P9_STATS_BASIC) { 1380f0853122SSripathi Kodi inode->i_atime.tv_sec = stat->st_atime_sec; 1381f0853122SSripathi Kodi inode->i_atime.tv_nsec = stat->st_atime_nsec; 1382f0853122SSripathi Kodi inode->i_mtime.tv_sec = stat->st_mtime_sec; 1383f0853122SSripathi Kodi inode->i_mtime.tv_nsec = stat->st_mtime_nsec; 1384f0853122SSripathi Kodi inode->i_ctime.tv_sec = stat->st_ctime_sec; 1385f0853122SSripathi Kodi inode->i_ctime.tv_nsec = stat->st_ctime_nsec; 1386f0853122SSripathi Kodi inode->i_uid = stat->st_uid; 1387f0853122SSripathi Kodi inode->i_gid = stat->st_gid; 1388f0853122SSripathi Kodi inode->i_nlink = stat->st_nlink; 1389f0853122SSripathi Kodi inode->i_mode = stat->st_mode; 1390f0853122SSripathi Kodi inode->i_rdev = new_decode_dev(stat->st_rdev); 1391f0853122SSripathi Kodi 1392f0853122SSripathi Kodi if ((S_ISBLK(inode->i_mode)) || (S_ISCHR(inode->i_mode))) 1393f0853122SSripathi Kodi init_special_inode(inode, inode->i_mode, inode->i_rdev); 1394f0853122SSripathi Kodi 1395f0853122SSripathi Kodi i_size_write(inode, stat->st_size); 1396f0853122SSripathi Kodi inode->i_blocks = stat->st_blocks; 1397f0853122SSripathi Kodi } else { 1398f0853122SSripathi Kodi if (stat->st_result_mask & P9_STATS_ATIME) { 1399f0853122SSripathi Kodi inode->i_atime.tv_sec = stat->st_atime_sec; 1400f0853122SSripathi Kodi inode->i_atime.tv_nsec = stat->st_atime_nsec; 1401f0853122SSripathi Kodi } 1402f0853122SSripathi Kodi if (stat->st_result_mask & P9_STATS_MTIME) { 1403f0853122SSripathi Kodi inode->i_mtime.tv_sec = stat->st_mtime_sec; 1404f0853122SSripathi Kodi inode->i_mtime.tv_nsec = stat->st_mtime_nsec; 1405f0853122SSripathi Kodi } 1406f0853122SSripathi Kodi if (stat->st_result_mask & P9_STATS_CTIME) { 1407f0853122SSripathi Kodi inode->i_ctime.tv_sec = stat->st_ctime_sec; 1408f0853122SSripathi Kodi inode->i_ctime.tv_nsec = stat->st_ctime_nsec; 1409f0853122SSripathi Kodi } 1410f0853122SSripathi Kodi if (stat->st_result_mask & P9_STATS_UID) 1411f0853122SSripathi Kodi inode->i_uid = stat->st_uid; 1412f0853122SSripathi Kodi if (stat->st_result_mask & P9_STATS_GID) 1413f0853122SSripathi Kodi inode->i_gid = stat->st_gid; 1414f0853122SSripathi Kodi if (stat->st_result_mask & P9_STATS_NLINK) 1415f0853122SSripathi Kodi inode->i_nlink = stat->st_nlink; 1416f0853122SSripathi Kodi if (stat->st_result_mask & P9_STATS_MODE) { 1417f0853122SSripathi Kodi inode->i_mode = stat->st_mode; 1418f0853122SSripathi Kodi if ((S_ISBLK(inode->i_mode)) || 1419f0853122SSripathi Kodi (S_ISCHR(inode->i_mode))) 1420f0853122SSripathi Kodi init_special_inode(inode, inode->i_mode, 1421f0853122SSripathi Kodi inode->i_rdev); 1422f0853122SSripathi Kodi } 1423f0853122SSripathi Kodi if (stat->st_result_mask & P9_STATS_RDEV) 1424f0853122SSripathi Kodi inode->i_rdev = new_decode_dev(stat->st_rdev); 1425f0853122SSripathi Kodi if (stat->st_result_mask & P9_STATS_SIZE) 1426f0853122SSripathi Kodi i_size_write(inode, stat->st_size); 1427f0853122SSripathi Kodi if (stat->st_result_mask & P9_STATS_BLOCKS) 1428f0853122SSripathi Kodi inode->i_blocks = stat->st_blocks; 1429f0853122SSripathi Kodi } 1430f0853122SSripathi Kodi if (stat->st_result_mask & P9_STATS_GEN) 1431f0853122SSripathi Kodi inode->i_generation = stat->st_gen; 1432f0853122SSripathi Kodi 1433f0853122SSripathi Kodi /* Currently we don't support P9_STATS_BTIME and P9_STATS_DATA_VERSION 1434f0853122SSripathi Kodi * because the inode structure does not have fields for them. 1435f0853122SSripathi Kodi */ 1436f0853122SSripathi Kodi } 1437f0853122SSripathi Kodi 1438f0853122SSripathi Kodi /** 14392bad8471SEric Van Hensbergen * v9fs_qid2ino - convert qid into inode number 14402bad8471SEric Van Hensbergen * @qid: qid to hash 14412bad8471SEric Van Hensbergen * 14422bad8471SEric Van Hensbergen * BUG: potential for inode number collisions? 14432bad8471SEric Van Hensbergen */ 14442bad8471SEric Van Hensbergen 1445bd238fb4SLatchesar Ionkov ino_t v9fs_qid2ino(struct p9_qid *qid) 14462bad8471SEric Van Hensbergen { 14472bad8471SEric Van Hensbergen u64 path = qid->path + 2; 14482bad8471SEric Van Hensbergen ino_t i = 0; 14492bad8471SEric Van Hensbergen 14502bad8471SEric Van Hensbergen if (sizeof(ino_t) == sizeof(path)) 14512bad8471SEric Van Hensbergen memcpy(&i, &path, sizeof(ino_t)); 14522bad8471SEric Van Hensbergen else 14532bad8471SEric Van Hensbergen i = (ino_t) (path ^ (path >> 32)); 14542bad8471SEric Van Hensbergen 14552bad8471SEric Van Hensbergen return i; 14562bad8471SEric Van Hensbergen } 14572bad8471SEric Van Hensbergen 14582bad8471SEric Van Hensbergen /** 14592bad8471SEric Van Hensbergen * v9fs_readlink - read a symlink's location (internal version) 14602bad8471SEric Van Hensbergen * @dentry: dentry for symlink 146173c592b9SEric Van Hensbergen * @buffer: buffer to load symlink location into 14622bad8471SEric Van Hensbergen * @buflen: length of buffer 14632bad8471SEric Van Hensbergen * 14642bad8471SEric Van Hensbergen */ 14652bad8471SEric Van Hensbergen 14662bad8471SEric Van Hensbergen static int v9fs_readlink(struct dentry *dentry, char *buffer, int buflen) 14672bad8471SEric Van Hensbergen { 1468bd238fb4SLatchesar Ionkov int retval; 14692bad8471SEric Van Hensbergen 1470bd238fb4SLatchesar Ionkov struct v9fs_session_info *v9ses; 1471bd238fb4SLatchesar Ionkov struct p9_fid *fid; 147251a87c55SEric Van Hensbergen struct p9_wstat *st; 14732bad8471SEric Van Hensbergen 1474bd238fb4SLatchesar Ionkov P9_DPRINTK(P9_DEBUG_VFS, " %s\n", dentry->d_name.name); 1475bd238fb4SLatchesar Ionkov retval = -EPERM; 1476bd238fb4SLatchesar Ionkov v9ses = v9fs_inode2v9ses(dentry->d_inode); 1477bd238fb4SLatchesar Ionkov fid = v9fs_fid_lookup(dentry); 1478da977b2cSEric Van Hensbergen if (IS_ERR(fid)) 1479da977b2cSEric Van Hensbergen return PTR_ERR(fid); 14802bad8471SEric Van Hensbergen 148150cc42ffSVenkateswararao Jujjuri (JV) if (!v9fs_proto_dotu(v9ses) && !v9fs_proto_dotl(v9ses)) 1482bd238fb4SLatchesar Ionkov return -EBADF; 14832bad8471SEric Van Hensbergen 1484bd238fb4SLatchesar Ionkov st = p9_client_stat(fid); 1485bd238fb4SLatchesar Ionkov if (IS_ERR(st)) 1486bd238fb4SLatchesar Ionkov return PTR_ERR(st); 14872bad8471SEric Van Hensbergen 1488bd238fb4SLatchesar Ionkov if (!(st->mode & P9_DMSYMLINK)) { 14892bad8471SEric Van Hensbergen retval = -EINVAL; 1490bd238fb4SLatchesar Ionkov goto done; 14912bad8471SEric Van Hensbergen } 14922bad8471SEric Van Hensbergen 14932bad8471SEric Van Hensbergen /* copy extension buffer into buffer */ 149451a87c55SEric Van Hensbergen strncpy(buffer, st->extension, buflen); 14952bad8471SEric Van Hensbergen 1496bd238fb4SLatchesar Ionkov P9_DPRINTK(P9_DEBUG_VFS, 149751a87c55SEric Van Hensbergen "%s -> %s (%s)\n", dentry->d_name.name, st->extension, buffer); 1498bd238fb4SLatchesar Ionkov 14992511cd0bSMartin Stava retval = strnlen(buffer, buflen); 1500bd238fb4SLatchesar Ionkov done: 150162b2be59SLatchesar Ionkov p9stat_free(st); 1502bd238fb4SLatchesar Ionkov kfree(st); 15032bad8471SEric Van Hensbergen return retval; 15042bad8471SEric Van Hensbergen } 15052bad8471SEric Van Hensbergen 15062bad8471SEric Van Hensbergen /** 15072bad8471SEric Van Hensbergen * v9fs_vfs_follow_link - follow a symlink path 15082bad8471SEric Van Hensbergen * @dentry: dentry for symlink 15092bad8471SEric Van Hensbergen * @nd: nameidata 15102bad8471SEric Van Hensbergen * 15112bad8471SEric Van Hensbergen */ 15122bad8471SEric Van Hensbergen 15132bad8471SEric Van Hensbergen static void *v9fs_vfs_follow_link(struct dentry *dentry, struct nameidata *nd) 15142bad8471SEric Van Hensbergen { 15152bad8471SEric Van Hensbergen int len = 0; 15162bad8471SEric Van Hensbergen char *link = __getname(); 15172bad8471SEric Van Hensbergen 1518bd238fb4SLatchesar Ionkov P9_DPRINTK(P9_DEBUG_VFS, "%s n", dentry->d_name.name); 15192bad8471SEric Van Hensbergen 15202bad8471SEric Van Hensbergen if (!link) 15212bad8471SEric Van Hensbergen link = ERR_PTR(-ENOMEM); 15222bad8471SEric Van Hensbergen else { 152316cce6d2SLatchesar Ionkov len = v9fs_readlink(dentry, link, PATH_MAX); 15242bad8471SEric Van Hensbergen 15252bad8471SEric Van Hensbergen if (len < 0) { 1526ce44eeb6SDavi Arnaut __putname(link); 15272bad8471SEric Van Hensbergen link = ERR_PTR(len); 15282bad8471SEric Van Hensbergen } else 15292511cd0bSMartin Stava link[min(len, PATH_MAX-1)] = 0; 15302bad8471SEric Van Hensbergen } 15312bad8471SEric Van Hensbergen nd_set_link(nd, link); 15322bad8471SEric Van Hensbergen 15332bad8471SEric Van Hensbergen return NULL; 15342bad8471SEric Van Hensbergen } 15352bad8471SEric Van Hensbergen 15362bad8471SEric Van Hensbergen /** 15372bad8471SEric Van Hensbergen * v9fs_vfs_put_link - release a symlink path 15382bad8471SEric Van Hensbergen * @dentry: dentry for symlink 15392bad8471SEric Van Hensbergen * @nd: nameidata 1540ee443996SEric Van Hensbergen * @p: unused 15412bad8471SEric Van Hensbergen * 15422bad8471SEric Van Hensbergen */ 15432bad8471SEric Van Hensbergen 1544ee443996SEric Van Hensbergen static void 1545ee443996SEric Van Hensbergen v9fs_vfs_put_link(struct dentry *dentry, struct nameidata *nd, void *p) 15462bad8471SEric Van Hensbergen { 15472bad8471SEric Van Hensbergen char *s = nd_get_link(nd); 15482bad8471SEric Van Hensbergen 15496ff23207SDuane Griffin P9_DPRINTK(P9_DEBUG_VFS, " %s %s\n", dentry->d_name.name, 15506ff23207SDuane Griffin IS_ERR(s) ? "<error>" : s); 15512bad8471SEric Van Hensbergen if (!IS_ERR(s)) 1552ce44eeb6SDavi Arnaut __putname(s); 15532bad8471SEric Van Hensbergen } 15542bad8471SEric Van Hensbergen 1555ee443996SEric Van Hensbergen /** 1556ee443996SEric Van Hensbergen * v9fs_vfs_mkspecial - create a special file 1557ee443996SEric Van Hensbergen * @dir: inode to create special file in 1558ee443996SEric Van Hensbergen * @dentry: dentry to create 1559ee443996SEric Van Hensbergen * @mode: mode to create special file 1560ee443996SEric Van Hensbergen * @extension: 9p2000.u format extension string representing special file 1561ee443996SEric Van Hensbergen * 1562ee443996SEric Van Hensbergen */ 1563ee443996SEric Van Hensbergen 1564531b1094SLatchesar Ionkov static int v9fs_vfs_mkspecial(struct inode *dir, struct dentry *dentry, 1565531b1094SLatchesar Ionkov int mode, const char *extension) 1566531b1094SLatchesar Ionkov { 1567bd238fb4SLatchesar Ionkov u32 perm; 1568531b1094SLatchesar Ionkov struct v9fs_session_info *v9ses; 1569bd238fb4SLatchesar Ionkov struct p9_fid *fid; 1570531b1094SLatchesar Ionkov 15716a3124a3SLatchesar Ionkov v9ses = v9fs_inode2v9ses(dir); 1572dd6102fbSSripathi Kodi if (!v9fs_proto_dotu(v9ses)) { 1573bd238fb4SLatchesar Ionkov P9_DPRINTK(P9_DEBUG_ERROR, "not extended\n"); 15746a3124a3SLatchesar Ionkov return -EPERM; 1575531b1094SLatchesar Ionkov } 1576531b1094SLatchesar Ionkov 1577da977b2cSEric Van Hensbergen perm = unixmode2p9mode(v9ses, mode); 1578bd238fb4SLatchesar Ionkov fid = v9fs_create(v9ses, dir, dentry, (char *) extension, perm, 1579bd238fb4SLatchesar Ionkov P9_OREAD); 1580bd238fb4SLatchesar Ionkov if (IS_ERR(fid)) 1581bd238fb4SLatchesar Ionkov return PTR_ERR(fid); 1582da977b2cSEric Van Hensbergen 1583bd238fb4SLatchesar Ionkov p9_client_clunk(fid); 15846a3124a3SLatchesar Ionkov return 0; 1585531b1094SLatchesar Ionkov } 1586531b1094SLatchesar Ionkov 1587531b1094SLatchesar Ionkov /** 158850cc42ffSVenkateswararao Jujjuri (JV) * v9fs_vfs_symlink_dotl - helper function to create symlinks 158950cc42ffSVenkateswararao Jujjuri (JV) * @dir: directory inode containing symlink 159050cc42ffSVenkateswararao Jujjuri (JV) * @dentry: dentry for symlink 159150cc42ffSVenkateswararao Jujjuri (JV) * @symname: symlink data 159250cc42ffSVenkateswararao Jujjuri (JV) * 159350cc42ffSVenkateswararao Jujjuri (JV) * See Also: 9P2000.L RFC for more information 159450cc42ffSVenkateswararao Jujjuri (JV) * 159550cc42ffSVenkateswararao Jujjuri (JV) */ 159650cc42ffSVenkateswararao Jujjuri (JV) 159750cc42ffSVenkateswararao Jujjuri (JV) static int 159850cc42ffSVenkateswararao Jujjuri (JV) v9fs_vfs_symlink_dotl(struct inode *dir, struct dentry *dentry, 159950cc42ffSVenkateswararao Jujjuri (JV) const char *symname) 160050cc42ffSVenkateswararao Jujjuri (JV) { 160150cc42ffSVenkateswararao Jujjuri (JV) struct v9fs_session_info *v9ses; 160250cc42ffSVenkateswararao Jujjuri (JV) struct p9_fid *dfid; 160350cc42ffSVenkateswararao Jujjuri (JV) struct p9_fid *fid = NULL; 160450cc42ffSVenkateswararao Jujjuri (JV) struct inode *inode; 160550cc42ffSVenkateswararao Jujjuri (JV) struct p9_qid qid; 160650cc42ffSVenkateswararao Jujjuri (JV) char *name; 160750cc42ffSVenkateswararao Jujjuri (JV) int err; 160850cc42ffSVenkateswararao Jujjuri (JV) gid_t gid; 160950cc42ffSVenkateswararao Jujjuri (JV) 161050cc42ffSVenkateswararao Jujjuri (JV) name = (char *) dentry->d_name.name; 161150cc42ffSVenkateswararao Jujjuri (JV) P9_DPRINTK(P9_DEBUG_VFS, "v9fs_vfs_symlink_dotl : %lu,%s,%s\n", 161250cc42ffSVenkateswararao Jujjuri (JV) dir->i_ino, name, symname); 161350cc42ffSVenkateswararao Jujjuri (JV) v9ses = v9fs_inode2v9ses(dir); 161450cc42ffSVenkateswararao Jujjuri (JV) 161550cc42ffSVenkateswararao Jujjuri (JV) dfid = v9fs_fid_lookup(dentry->d_parent); 161650cc42ffSVenkateswararao Jujjuri (JV) if (IS_ERR(dfid)) { 161750cc42ffSVenkateswararao Jujjuri (JV) err = PTR_ERR(dfid); 161850cc42ffSVenkateswararao Jujjuri (JV) P9_DPRINTK(P9_DEBUG_VFS, "fid lookup failed %d\n", err); 161950cc42ffSVenkateswararao Jujjuri (JV) return err; 162050cc42ffSVenkateswararao Jujjuri (JV) } 162150cc42ffSVenkateswararao Jujjuri (JV) 162250cc42ffSVenkateswararao Jujjuri (JV) gid = v9fs_get_fsgid_for_create(dir); 162350cc42ffSVenkateswararao Jujjuri (JV) 162450cc42ffSVenkateswararao Jujjuri (JV) /* Server doesn't alter fid on TSYMLINK. Hence no need to clone it. */ 162550cc42ffSVenkateswararao Jujjuri (JV) err = p9_client_symlink(dfid, name, (char *)symname, gid, &qid); 162650cc42ffSVenkateswararao Jujjuri (JV) 162750cc42ffSVenkateswararao Jujjuri (JV) if (err < 0) { 162850cc42ffSVenkateswararao Jujjuri (JV) P9_DPRINTK(P9_DEBUG_VFS, "p9_client_symlink failed %d\n", err); 162950cc42ffSVenkateswararao Jujjuri (JV) goto error; 163050cc42ffSVenkateswararao Jujjuri (JV) } 163150cc42ffSVenkateswararao Jujjuri (JV) 163250cc42ffSVenkateswararao Jujjuri (JV) if (v9ses->cache) { 163350cc42ffSVenkateswararao Jujjuri (JV) /* Now walk from the parent so we can get an unopened fid. */ 163450cc42ffSVenkateswararao Jujjuri (JV) fid = p9_client_walk(dfid, 1, &name, 1); 163550cc42ffSVenkateswararao Jujjuri (JV) if (IS_ERR(fid)) { 163650cc42ffSVenkateswararao Jujjuri (JV) err = PTR_ERR(fid); 163750cc42ffSVenkateswararao Jujjuri (JV) P9_DPRINTK(P9_DEBUG_VFS, "p9_client_walk failed %d\n", 163850cc42ffSVenkateswararao Jujjuri (JV) err); 163950cc42ffSVenkateswararao Jujjuri (JV) fid = NULL; 164050cc42ffSVenkateswararao Jujjuri (JV) goto error; 164150cc42ffSVenkateswararao Jujjuri (JV) } 164250cc42ffSVenkateswararao Jujjuri (JV) 164350cc42ffSVenkateswararao Jujjuri (JV) /* instantiate inode and assign the unopened fid to dentry */ 164450cc42ffSVenkateswararao Jujjuri (JV) inode = v9fs_inode_from_fid(v9ses, fid, dir->i_sb); 164550cc42ffSVenkateswararao Jujjuri (JV) if (IS_ERR(inode)) { 164650cc42ffSVenkateswararao Jujjuri (JV) err = PTR_ERR(inode); 164750cc42ffSVenkateswararao Jujjuri (JV) P9_DPRINTK(P9_DEBUG_VFS, "inode creation failed %d\n", 164850cc42ffSVenkateswararao Jujjuri (JV) err); 164950cc42ffSVenkateswararao Jujjuri (JV) goto error; 165050cc42ffSVenkateswararao Jujjuri (JV) } 165150cc42ffSVenkateswararao Jujjuri (JV) dentry->d_op = &v9fs_cached_dentry_operations; 165250cc42ffSVenkateswararao Jujjuri (JV) d_instantiate(dentry, inode); 165350cc42ffSVenkateswararao Jujjuri (JV) err = v9fs_fid_add(dentry, fid); 165450cc42ffSVenkateswararao Jujjuri (JV) if (err < 0) 165550cc42ffSVenkateswararao Jujjuri (JV) goto error; 165650cc42ffSVenkateswararao Jujjuri (JV) fid = NULL; 165750cc42ffSVenkateswararao Jujjuri (JV) } else { 165850cc42ffSVenkateswararao Jujjuri (JV) /* Not in cached mode. No need to populate inode with stat */ 165950cc42ffSVenkateswararao Jujjuri (JV) inode = v9fs_get_inode(dir->i_sb, S_IFLNK); 166050cc42ffSVenkateswararao Jujjuri (JV) if (IS_ERR(inode)) { 166150cc42ffSVenkateswararao Jujjuri (JV) err = PTR_ERR(inode); 166250cc42ffSVenkateswararao Jujjuri (JV) goto error; 166350cc42ffSVenkateswararao Jujjuri (JV) } 166450cc42ffSVenkateswararao Jujjuri (JV) dentry->d_op = &v9fs_dentry_operations; 166550cc42ffSVenkateswararao Jujjuri (JV) d_instantiate(dentry, inode); 166650cc42ffSVenkateswararao Jujjuri (JV) } 166750cc42ffSVenkateswararao Jujjuri (JV) 166850cc42ffSVenkateswararao Jujjuri (JV) error: 166950cc42ffSVenkateswararao Jujjuri (JV) if (fid) 167050cc42ffSVenkateswararao Jujjuri (JV) p9_client_clunk(fid); 167150cc42ffSVenkateswararao Jujjuri (JV) 167250cc42ffSVenkateswararao Jujjuri (JV) return err; 167350cc42ffSVenkateswararao Jujjuri (JV) } 167450cc42ffSVenkateswararao Jujjuri (JV) 167550cc42ffSVenkateswararao Jujjuri (JV) /** 1676531b1094SLatchesar Ionkov * v9fs_vfs_symlink - helper function to create symlinks 1677531b1094SLatchesar Ionkov * @dir: directory inode containing symlink 1678531b1094SLatchesar Ionkov * @dentry: dentry for symlink 1679531b1094SLatchesar Ionkov * @symname: symlink data 1680531b1094SLatchesar Ionkov * 1681ee443996SEric Van Hensbergen * See Also: 9P2000.u RFC for more information 1682531b1094SLatchesar Ionkov * 1683531b1094SLatchesar Ionkov */ 1684531b1094SLatchesar Ionkov 1685531b1094SLatchesar Ionkov static int 1686531b1094SLatchesar Ionkov v9fs_vfs_symlink(struct inode *dir, struct dentry *dentry, const char *symname) 1687531b1094SLatchesar Ionkov { 1688bd238fb4SLatchesar Ionkov P9_DPRINTK(P9_DEBUG_VFS, " %lu,%s,%s\n", dir->i_ino, 1689bd238fb4SLatchesar Ionkov dentry->d_name.name, symname); 1690531b1094SLatchesar Ionkov 1691531b1094SLatchesar Ionkov return v9fs_vfs_mkspecial(dir, dentry, S_IFLNK, symname); 1692531b1094SLatchesar Ionkov } 1693531b1094SLatchesar Ionkov 16942bad8471SEric Van Hensbergen /** 16952bad8471SEric Van Hensbergen * v9fs_vfs_link - create a hardlink 16962bad8471SEric Van Hensbergen * @old_dentry: dentry for file to link to 16972bad8471SEric Van Hensbergen * @dir: inode destination for new link 169873c592b9SEric Van Hensbergen * @dentry: dentry for link 16992bad8471SEric Van Hensbergen * 17002bad8471SEric Van Hensbergen */ 17012bad8471SEric Van Hensbergen 17022bad8471SEric Van Hensbergen static int 17032bad8471SEric Van Hensbergen v9fs_vfs_link(struct dentry *old_dentry, struct inode *dir, 17042bad8471SEric Van Hensbergen struct dentry *dentry) 17052bad8471SEric Van Hensbergen { 1706531b1094SLatchesar Ionkov int retval; 1707bd238fb4SLatchesar Ionkov struct p9_fid *oldfid; 1708531b1094SLatchesar Ionkov char *name; 17092bad8471SEric Van Hensbergen 1710bd238fb4SLatchesar Ionkov P9_DPRINTK(P9_DEBUG_VFS, 1711bd238fb4SLatchesar Ionkov " %lu,%s,%s\n", dir->i_ino, dentry->d_name.name, 17122bad8471SEric Van Hensbergen old_dentry->d_name.name); 17132bad8471SEric Van Hensbergen 1714da977b2cSEric Van Hensbergen oldfid = v9fs_fid_clone(old_dentry); 1715da977b2cSEric Van Hensbergen if (IS_ERR(oldfid)) 1716da977b2cSEric Van Hensbergen return PTR_ERR(oldfid); 17172bad8471SEric Van Hensbergen 1718531b1094SLatchesar Ionkov name = __getname(); 1719da977b2cSEric Van Hensbergen if (unlikely(!name)) { 1720da977b2cSEric Van Hensbergen retval = -ENOMEM; 1721da977b2cSEric Van Hensbergen goto clunk_fid; 1722da977b2cSEric Van Hensbergen } 17230710d36aSFlorin Malita 172416cce6d2SLatchesar Ionkov sprintf(name, "%d\n", oldfid->fid); 1725bd238fb4SLatchesar Ionkov retval = v9fs_vfs_mkspecial(dir, dentry, P9_DMLINK, name); 1726531b1094SLatchesar Ionkov __putname(name); 17272bad8471SEric Van Hensbergen 1728da977b2cSEric Van Hensbergen clunk_fid: 1729bd238fb4SLatchesar Ionkov p9_client_clunk(oldfid); 17302bad8471SEric Van Hensbergen return retval; 17312bad8471SEric Van Hensbergen } 17322bad8471SEric Van Hensbergen 17332bad8471SEric Van Hensbergen /** 173409d34ee5SEric Van Hensbergen * v9fs_vfs_link_dotl - create a hardlink for dotl 173509d34ee5SEric Van Hensbergen * @old_dentry: dentry for file to link to 173609d34ee5SEric Van Hensbergen * @dir: inode destination for new link 173709d34ee5SEric Van Hensbergen * @dentry: dentry for link 173809d34ee5SEric Van Hensbergen * 173909d34ee5SEric Van Hensbergen */ 174009d34ee5SEric Van Hensbergen 174109d34ee5SEric Van Hensbergen static int 174209d34ee5SEric Van Hensbergen v9fs_vfs_link_dotl(struct dentry *old_dentry, struct inode *dir, 174309d34ee5SEric Van Hensbergen struct dentry *dentry) 174409d34ee5SEric Van Hensbergen { 174509d34ee5SEric Van Hensbergen int err; 174609d34ee5SEric Van Hensbergen struct p9_fid *dfid, *oldfid; 174709d34ee5SEric Van Hensbergen char *name; 174809d34ee5SEric Van Hensbergen struct v9fs_session_info *v9ses; 174909d34ee5SEric Van Hensbergen struct dentry *dir_dentry; 175009d34ee5SEric Van Hensbergen 175109d34ee5SEric Van Hensbergen P9_DPRINTK(P9_DEBUG_VFS, "dir ino: %lu, old_name: %s, new_name: %s\n", 175209d34ee5SEric Van Hensbergen dir->i_ino, old_dentry->d_name.name, 175309d34ee5SEric Van Hensbergen dentry->d_name.name); 175409d34ee5SEric Van Hensbergen 175509d34ee5SEric Van Hensbergen v9ses = v9fs_inode2v9ses(dir); 175609d34ee5SEric Van Hensbergen dir_dentry = v9fs_dentry_from_dir_inode(dir); 175709d34ee5SEric Van Hensbergen dfid = v9fs_fid_lookup(dir_dentry); 175809d34ee5SEric Van Hensbergen if (IS_ERR(dfid)) 175909d34ee5SEric Van Hensbergen return PTR_ERR(dfid); 176009d34ee5SEric Van Hensbergen 176109d34ee5SEric Van Hensbergen oldfid = v9fs_fid_lookup(old_dentry); 176209d34ee5SEric Van Hensbergen if (IS_ERR(oldfid)) 176309d34ee5SEric Van Hensbergen return PTR_ERR(oldfid); 176409d34ee5SEric Van Hensbergen 176509d34ee5SEric Van Hensbergen name = (char *) dentry->d_name.name; 176609d34ee5SEric Van Hensbergen 176709d34ee5SEric Van Hensbergen err = p9_client_link(dfid, oldfid, (char *)dentry->d_name.name); 176809d34ee5SEric Van Hensbergen 176909d34ee5SEric Van Hensbergen if (err < 0) { 177009d34ee5SEric Van Hensbergen P9_DPRINTK(P9_DEBUG_VFS, "p9_client_link failed %d\n", err); 177109d34ee5SEric Van Hensbergen return err; 177209d34ee5SEric Van Hensbergen } 177309d34ee5SEric Van Hensbergen 177409d34ee5SEric Van Hensbergen if (v9ses->cache == CACHE_LOOSE || v9ses->cache == CACHE_FSCACHE) { 177509d34ee5SEric Van Hensbergen /* Get the latest stat info from server. */ 177609d34ee5SEric Van Hensbergen struct p9_fid *fid; 177709d34ee5SEric Van Hensbergen struct p9_stat_dotl *st; 177809d34ee5SEric Van Hensbergen 177909d34ee5SEric Van Hensbergen fid = v9fs_fid_lookup(old_dentry); 178009d34ee5SEric Van Hensbergen if (IS_ERR(fid)) 178109d34ee5SEric Van Hensbergen return PTR_ERR(fid); 178209d34ee5SEric Van Hensbergen 178309d34ee5SEric Van Hensbergen st = p9_client_getattr_dotl(fid, P9_STATS_BASIC); 178409d34ee5SEric Van Hensbergen if (IS_ERR(st)) 178509d34ee5SEric Van Hensbergen return PTR_ERR(st); 178609d34ee5SEric Van Hensbergen 178709d34ee5SEric Van Hensbergen v9fs_stat2inode_dotl(st, old_dentry->d_inode); 178809d34ee5SEric Van Hensbergen 178909d34ee5SEric Van Hensbergen kfree(st); 179009d34ee5SEric Van Hensbergen } else { 179109d34ee5SEric Van Hensbergen /* Caching disabled. No need to get upto date stat info. 17927de9c6eeSAl Viro * This dentry will be released immediately. So, just hold the 17937de9c6eeSAl Viro * inode 179409d34ee5SEric Van Hensbergen */ 17957de9c6eeSAl Viro ihold(old_dentry->d_inode); 179609d34ee5SEric Van Hensbergen } 179709d34ee5SEric Van Hensbergen 179809d34ee5SEric Van Hensbergen dentry->d_op = old_dentry->d_op; 179909d34ee5SEric Van Hensbergen d_instantiate(dentry, old_dentry->d_inode); 180009d34ee5SEric Van Hensbergen 180109d34ee5SEric Van Hensbergen return err; 180209d34ee5SEric Van Hensbergen } 180309d34ee5SEric Van Hensbergen 180409d34ee5SEric Van Hensbergen /** 18052bad8471SEric Van Hensbergen * v9fs_vfs_mknod - create a special file 18062bad8471SEric Van Hensbergen * @dir: inode destination for new link 18072bad8471SEric Van Hensbergen * @dentry: dentry for file 18082bad8471SEric Van Hensbergen * @mode: mode for creation 1809ee443996SEric Van Hensbergen * @rdev: device associated with special file 18102bad8471SEric Van Hensbergen * 18112bad8471SEric Van Hensbergen */ 18122bad8471SEric Van Hensbergen 18132bad8471SEric Van Hensbergen static int 18142bad8471SEric Van Hensbergen v9fs_vfs_mknod(struct inode *dir, struct dentry *dentry, int mode, dev_t rdev) 18152bad8471SEric Van Hensbergen { 1816531b1094SLatchesar Ionkov int retval; 1817531b1094SLatchesar Ionkov char *name; 18182bad8471SEric Van Hensbergen 1819bd238fb4SLatchesar Ionkov P9_DPRINTK(P9_DEBUG_VFS, 1820bd238fb4SLatchesar Ionkov " %lu,%s mode: %x MAJOR: %u MINOR: %u\n", dir->i_ino, 18212bad8471SEric Van Hensbergen dentry->d_name.name, mode, MAJOR(rdev), MINOR(rdev)); 18222bad8471SEric Van Hensbergen 1823531b1094SLatchesar Ionkov if (!new_valid_dev(rdev)) 1824531b1094SLatchesar Ionkov return -EINVAL; 182573c592b9SEric Van Hensbergen 1826531b1094SLatchesar Ionkov name = __getname(); 1827c0291a05SEugene Teo if (!name) 1828c0291a05SEugene Teo return -ENOMEM; 18292bad8471SEric Van Hensbergen /* build extension */ 18302bad8471SEric Van Hensbergen if (S_ISBLK(mode)) 1831531b1094SLatchesar Ionkov sprintf(name, "b %u %u", MAJOR(rdev), MINOR(rdev)); 18322bad8471SEric Van Hensbergen else if (S_ISCHR(mode)) 1833531b1094SLatchesar Ionkov sprintf(name, "c %u %u", MAJOR(rdev), MINOR(rdev)); 183473c592b9SEric Van Hensbergen else if (S_ISFIFO(mode)) 1835531b1094SLatchesar Ionkov *name = 0; 183675cc5c9bSVenkateswararao Jujjuri else if (S_ISSOCK(mode)) 183775cc5c9bSVenkateswararao Jujjuri *name = 0; 18382bad8471SEric Van Hensbergen else { 1839531b1094SLatchesar Ionkov __putname(name); 1840531b1094SLatchesar Ionkov return -EINVAL; 18412bad8471SEric Van Hensbergen } 18422bad8471SEric Van Hensbergen 1843531b1094SLatchesar Ionkov retval = v9fs_vfs_mkspecial(dir, dentry, mode, name); 1844531b1094SLatchesar Ionkov __putname(name); 18452bad8471SEric Van Hensbergen 18462bad8471SEric Van Hensbergen return retval; 18472bad8471SEric Van Hensbergen } 18482bad8471SEric Van Hensbergen 18494b43516aSM. Mohan Kumar /** 18504b43516aSM. Mohan Kumar * v9fs_vfs_mknod_dotl - create a special file 18514b43516aSM. Mohan Kumar * @dir: inode destination for new link 18524b43516aSM. Mohan Kumar * @dentry: dentry for file 18534b43516aSM. Mohan Kumar * @mode: mode for creation 18544b43516aSM. Mohan Kumar * @rdev: device associated with special file 18554b43516aSM. Mohan Kumar * 18564b43516aSM. Mohan Kumar */ 18574b43516aSM. Mohan Kumar static int 18584b43516aSM. Mohan Kumar v9fs_vfs_mknod_dotl(struct inode *dir, struct dentry *dentry, int mode, 18594b43516aSM. Mohan Kumar dev_t rdev) 18604b43516aSM. Mohan Kumar { 18614b43516aSM. Mohan Kumar int err; 18624b43516aSM. Mohan Kumar char *name; 18634b43516aSM. Mohan Kumar struct v9fs_session_info *v9ses; 18644b43516aSM. Mohan Kumar struct p9_fid *fid = NULL, *dfid = NULL; 18654b43516aSM. Mohan Kumar struct inode *inode; 18664b43516aSM. Mohan Kumar gid_t gid; 18674b43516aSM. Mohan Kumar struct p9_qid qid; 186801a622bdSM. Mohan Kumar struct dentry *dir_dentry; 18694b43516aSM. Mohan Kumar 18704b43516aSM. Mohan Kumar P9_DPRINTK(P9_DEBUG_VFS, 18714b43516aSM. Mohan Kumar " %lu,%s mode: %x MAJOR: %u MINOR: %u\n", dir->i_ino, 18724b43516aSM. Mohan Kumar dentry->d_name.name, mode, MAJOR(rdev), MINOR(rdev)); 18734b43516aSM. Mohan Kumar 18744b43516aSM. Mohan Kumar if (!new_valid_dev(rdev)) 18754b43516aSM. Mohan Kumar return -EINVAL; 18764b43516aSM. Mohan Kumar 18774b43516aSM. Mohan Kumar v9ses = v9fs_inode2v9ses(dir); 18784b43516aSM. Mohan Kumar dir_dentry = v9fs_dentry_from_dir_inode(dir); 187901a622bdSM. Mohan Kumar dfid = v9fs_fid_lookup(dir_dentry); 18804b43516aSM. Mohan Kumar if (IS_ERR(dfid)) { 18814b43516aSM. Mohan Kumar err = PTR_ERR(dfid); 18824b43516aSM. Mohan Kumar P9_DPRINTK(P9_DEBUG_VFS, "fid lookup failed %d\n", err); 18834b43516aSM. Mohan Kumar dfid = NULL; 18844b43516aSM. Mohan Kumar goto error; 18854b43516aSM. Mohan Kumar } 18864b43516aSM. Mohan Kumar 18874b43516aSM. Mohan Kumar gid = v9fs_get_fsgid_for_create(dir); 18884b43516aSM. Mohan Kumar 18894b43516aSM. Mohan Kumar name = (char *) dentry->d_name.name; 18904b43516aSM. Mohan Kumar 18914b43516aSM. Mohan Kumar err = p9_client_mknod_dotl(dfid, name, mode, rdev, gid, &qid); 18924b43516aSM. Mohan Kumar if (err < 0) 18934b43516aSM. Mohan Kumar goto error; 18944b43516aSM. Mohan Kumar 18954b43516aSM. Mohan Kumar /* instantiate inode and assign the unopened fid to the dentry */ 18964b43516aSM. Mohan Kumar if (v9ses->cache == CACHE_LOOSE || v9ses->cache == CACHE_FSCACHE) { 18974b43516aSM. Mohan Kumar fid = p9_client_walk(dfid, 1, &name, 1); 18984b43516aSM. Mohan Kumar if (IS_ERR(fid)) { 18994b43516aSM. Mohan Kumar err = PTR_ERR(fid); 19004b43516aSM. Mohan Kumar P9_DPRINTK(P9_DEBUG_VFS, "p9_client_walk failed %d\n", 19014b43516aSM. Mohan Kumar err); 19024b43516aSM. Mohan Kumar fid = NULL; 19034b43516aSM. Mohan Kumar goto error; 19044b43516aSM. Mohan Kumar } 19054b43516aSM. Mohan Kumar 19064b43516aSM. Mohan Kumar inode = v9fs_inode_from_fid(v9ses, fid, dir->i_sb); 19074b43516aSM. Mohan Kumar if (IS_ERR(inode)) { 19084b43516aSM. Mohan Kumar err = PTR_ERR(inode); 19094b43516aSM. Mohan Kumar P9_DPRINTK(P9_DEBUG_VFS, "inode creation failed %d\n", 19104b43516aSM. Mohan Kumar err); 19114b43516aSM. Mohan Kumar goto error; 19124b43516aSM. Mohan Kumar } 19134b43516aSM. Mohan Kumar dentry->d_op = &v9fs_cached_dentry_operations; 19144b43516aSM. Mohan Kumar d_instantiate(dentry, inode); 19154b43516aSM. Mohan Kumar err = v9fs_fid_add(dentry, fid); 19164b43516aSM. Mohan Kumar if (err < 0) 19174b43516aSM. Mohan Kumar goto error; 19184b43516aSM. Mohan Kumar fid = NULL; 19194b43516aSM. Mohan Kumar } else { 19204b43516aSM. Mohan Kumar /* 19214b43516aSM. Mohan Kumar * Not in cached mode. No need to populate inode with stat. 19224b43516aSM. Mohan Kumar * socket syscall returns a fd, so we need instantiate 19234b43516aSM. Mohan Kumar */ 19244b43516aSM. Mohan Kumar inode = v9fs_get_inode(dir->i_sb, mode); 19254b43516aSM. Mohan Kumar if (IS_ERR(inode)) { 19264b43516aSM. Mohan Kumar err = PTR_ERR(inode); 19274b43516aSM. Mohan Kumar goto error; 19284b43516aSM. Mohan Kumar } 19294b43516aSM. Mohan Kumar dentry->d_op = &v9fs_dentry_operations; 19304b43516aSM. Mohan Kumar d_instantiate(dentry, inode); 19314b43516aSM. Mohan Kumar } 19324b43516aSM. Mohan Kumar 19334b43516aSM. Mohan Kumar error: 19344b43516aSM. Mohan Kumar if (fid) 19354b43516aSM. Mohan Kumar p9_client_clunk(fid); 19364b43516aSM. Mohan Kumar return err; 19374b43516aSM. Mohan Kumar } 19384b43516aSM. Mohan Kumar 19399b6533c9SSripathi Kodi static const struct inode_operations v9fs_dir_inode_operations_dotu = { 19409b6533c9SSripathi Kodi .create = v9fs_vfs_create, 19419b6533c9SSripathi Kodi .lookup = v9fs_vfs_lookup, 19429b6533c9SSripathi Kodi .symlink = v9fs_vfs_symlink, 194350cc42ffSVenkateswararao Jujjuri (JV) .link = v9fs_vfs_link, 19449b6533c9SSripathi Kodi .unlink = v9fs_vfs_unlink, 19459b6533c9SSripathi Kodi .mkdir = v9fs_vfs_mkdir, 19469b6533c9SSripathi Kodi .rmdir = v9fs_vfs_rmdir, 19471d76e313SAneesh Kumar K.V .mknod = v9fs_vfs_mknod, 19489b6533c9SSripathi Kodi .rename = v9fs_vfs_rename, 19499b6533c9SSripathi Kodi .getattr = v9fs_vfs_getattr, 19509b6533c9SSripathi Kodi .setattr = v9fs_vfs_setattr, 19519b6533c9SSripathi Kodi }; 19529b6533c9SSripathi Kodi 19539b6533c9SSripathi Kodi static const struct inode_operations v9fs_dir_inode_operations_dotl = { 19545643135aSVenkateswararao Jujjuri (JV) .create = v9fs_vfs_create_dotl, 19552bad8471SEric Van Hensbergen .lookup = v9fs_vfs_lookup, 195650cc42ffSVenkateswararao Jujjuri (JV) .link = v9fs_vfs_link_dotl, 195750cc42ffSVenkateswararao Jujjuri (JV) .symlink = v9fs_vfs_symlink_dotl, 19582bad8471SEric Van Hensbergen .unlink = v9fs_vfs_unlink, 195901a622bdSM. Mohan Kumar .mkdir = v9fs_vfs_mkdir_dotl, 19602bad8471SEric Van Hensbergen .rmdir = v9fs_vfs_rmdir, 19614b43516aSM. Mohan Kumar .mknod = v9fs_vfs_mknod_dotl, 19622bad8471SEric Van Hensbergen .rename = v9fs_vfs_rename, 1963f0853122SSripathi Kodi .getattr = v9fs_vfs_getattr_dotl, 196487d7845aSSripathi Kodi .setattr = v9fs_vfs_setattr_dotl, 1965ebf46264SAneesh Kumar K.V .setxattr = generic_setxattr, 1966ebf46264SAneesh Kumar K.V .getxattr = generic_getxattr, 1967ebf46264SAneesh Kumar K.V .removexattr = generic_removexattr, 1968ebf46264SAneesh Kumar K.V .listxattr = v9fs_listxattr, 196985ff872dSAneesh Kumar K.V .check_acl = v9fs_check_acl, 19702bad8471SEric Van Hensbergen }; 19712bad8471SEric Van Hensbergen 1972754661f1SArjan van de Ven static const struct inode_operations v9fs_dir_inode_operations = { 1973b501611aSEric Van Hensbergen .create = v9fs_vfs_create, 1974b501611aSEric Van Hensbergen .lookup = v9fs_vfs_lookup, 1975b501611aSEric Van Hensbergen .unlink = v9fs_vfs_unlink, 1976b501611aSEric Van Hensbergen .mkdir = v9fs_vfs_mkdir, 1977b501611aSEric Van Hensbergen .rmdir = v9fs_vfs_rmdir, 1978b501611aSEric Van Hensbergen .mknod = v9fs_vfs_mknod, 1979b501611aSEric Van Hensbergen .rename = v9fs_vfs_rename, 1980b501611aSEric Van Hensbergen .getattr = v9fs_vfs_getattr, 1981b501611aSEric Van Hensbergen .setattr = v9fs_vfs_setattr, 1982b501611aSEric Van Hensbergen }; 1983b501611aSEric Van Hensbergen 1984754661f1SArjan van de Ven static const struct inode_operations v9fs_file_inode_operations = { 19852bad8471SEric Van Hensbergen .getattr = v9fs_vfs_getattr, 19862bad8471SEric Van Hensbergen .setattr = v9fs_vfs_setattr, 19872bad8471SEric Van Hensbergen }; 19882bad8471SEric Van Hensbergen 19899b6533c9SSripathi Kodi static const struct inode_operations v9fs_file_inode_operations_dotl = { 1990f0853122SSripathi Kodi .getattr = v9fs_vfs_getattr_dotl, 199187d7845aSSripathi Kodi .setattr = v9fs_vfs_setattr_dotl, 1992ebf46264SAneesh Kumar K.V .setxattr = generic_setxattr, 1993ebf46264SAneesh Kumar K.V .getxattr = generic_getxattr, 1994ebf46264SAneesh Kumar K.V .removexattr = generic_removexattr, 1995ebf46264SAneesh Kumar K.V .listxattr = v9fs_listxattr, 199685ff872dSAneesh Kumar K.V .check_acl = v9fs_check_acl, 19979b6533c9SSripathi Kodi }; 19989b6533c9SSripathi Kodi 1999754661f1SArjan van de Ven static const struct inode_operations v9fs_symlink_inode_operations = { 2000204f2f0eSAl Viro .readlink = generic_readlink, 20012bad8471SEric Van Hensbergen .follow_link = v9fs_vfs_follow_link, 20022bad8471SEric Van Hensbergen .put_link = v9fs_vfs_put_link, 20032bad8471SEric Van Hensbergen .getattr = v9fs_vfs_getattr, 20042bad8471SEric Van Hensbergen .setattr = v9fs_vfs_setattr, 20052bad8471SEric Van Hensbergen }; 20069b6533c9SSripathi Kodi 20079b6533c9SSripathi Kodi static const struct inode_operations v9fs_symlink_inode_operations_dotl = { 20089b6533c9SSripathi Kodi .readlink = generic_readlink, 20099b6533c9SSripathi Kodi .follow_link = v9fs_vfs_follow_link, 20109b6533c9SSripathi Kodi .put_link = v9fs_vfs_put_link, 2011f0853122SSripathi Kodi .getattr = v9fs_vfs_getattr_dotl, 201287d7845aSSripathi Kodi .setattr = v9fs_vfs_setattr_dotl, 2013ebf46264SAneesh Kumar K.V .setxattr = generic_setxattr, 2014ebf46264SAneesh Kumar K.V .getxattr = generic_getxattr, 2015ebf46264SAneesh Kumar K.V .removexattr = generic_removexattr, 2016ebf46264SAneesh Kumar K.V .listxattr = v9fs_listxattr, 20179b6533c9SSripathi Kodi }; 2018