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 58f5fc6145SAneesh Kumar K.V static int 59f5fc6145SAneesh Kumar K.V v9fs_vfs_mknod_dotl(struct inode *dir, struct dentry *dentry, int omode, 60f5fc6145SAneesh Kumar K.V dev_t rdev); 61f5fc6145SAneesh Kumar K.V 622bad8471SEric Van Hensbergen /** 632bad8471SEric Van Hensbergen * unixmode2p9mode - convert unix mode bits to plan 9 642bad8471SEric Van Hensbergen * @v9ses: v9fs session information 652bad8471SEric Van Hensbergen * @mode: mode to convert 662bad8471SEric Van Hensbergen * 672bad8471SEric Van Hensbergen */ 682bad8471SEric Van Hensbergen 6973c592b9SEric Van Hensbergen static int unixmode2p9mode(struct v9fs_session_info *v9ses, int mode) 702bad8471SEric Van Hensbergen { 712bad8471SEric Van Hensbergen int res; 722bad8471SEric Van Hensbergen res = mode & 0777; 732bad8471SEric Van Hensbergen if (S_ISDIR(mode)) 74bd238fb4SLatchesar Ionkov res |= P9_DMDIR; 75dd6102fbSSripathi Kodi if (v9fs_proto_dotu(v9ses)) { 762bad8471SEric Van Hensbergen if (S_ISLNK(mode)) 77bd238fb4SLatchesar Ionkov res |= P9_DMSYMLINK; 782bad8471SEric Van Hensbergen if (v9ses->nodev == 0) { 792bad8471SEric Van Hensbergen if (S_ISSOCK(mode)) 80bd238fb4SLatchesar Ionkov res |= P9_DMSOCKET; 812bad8471SEric Van Hensbergen if (S_ISFIFO(mode)) 82bd238fb4SLatchesar Ionkov res |= P9_DMNAMEDPIPE; 832bad8471SEric Van Hensbergen if (S_ISBLK(mode)) 84bd238fb4SLatchesar Ionkov res |= P9_DMDEVICE; 852bad8471SEric Van Hensbergen if (S_ISCHR(mode)) 86bd238fb4SLatchesar Ionkov res |= P9_DMDEVICE; 872bad8471SEric Van Hensbergen } 882bad8471SEric Van Hensbergen 892bad8471SEric Van Hensbergen if ((mode & S_ISUID) == S_ISUID) 90bd238fb4SLatchesar Ionkov res |= P9_DMSETUID; 912bad8471SEric Van Hensbergen if ((mode & S_ISGID) == S_ISGID) 92bd238fb4SLatchesar Ionkov res |= P9_DMSETGID; 93d199d652SAnthony Liguori if ((mode & S_ISVTX) == S_ISVTX) 94d199d652SAnthony Liguori res |= P9_DMSETVTX; 95bd238fb4SLatchesar Ionkov if ((mode & P9_DMLINK)) 96bd238fb4SLatchesar Ionkov res |= P9_DMLINK; 972bad8471SEric Van Hensbergen } 982bad8471SEric Van Hensbergen 992bad8471SEric Van Hensbergen return res; 1002bad8471SEric Van Hensbergen } 1012bad8471SEric Van Hensbergen 1022bad8471SEric Van Hensbergen /** 1032bad8471SEric Van Hensbergen * p9mode2unixmode- convert plan9 mode bits to unix mode bits 1042bad8471SEric Van Hensbergen * @v9ses: v9fs session information 1052bad8471SEric Van Hensbergen * @mode: mode to convert 1062bad8471SEric Van Hensbergen * 1072bad8471SEric Van Hensbergen */ 1082bad8471SEric Van Hensbergen 10973c592b9SEric Van Hensbergen static int p9mode2unixmode(struct v9fs_session_info *v9ses, int mode) 1102bad8471SEric Van Hensbergen { 1112bad8471SEric Van Hensbergen int res; 1122bad8471SEric Van Hensbergen 1132bad8471SEric Van Hensbergen res = mode & 0777; 1142bad8471SEric Van Hensbergen 115bd238fb4SLatchesar Ionkov if ((mode & P9_DMDIR) == P9_DMDIR) 1162bad8471SEric Van Hensbergen res |= S_IFDIR; 117dd6102fbSSripathi Kodi else if ((mode & P9_DMSYMLINK) && (v9fs_proto_dotu(v9ses))) 1182bad8471SEric Van Hensbergen res |= S_IFLNK; 119dd6102fbSSripathi Kodi else if ((mode & P9_DMSOCKET) && (v9fs_proto_dotu(v9ses)) 1202bad8471SEric Van Hensbergen && (v9ses->nodev == 0)) 1212bad8471SEric Van Hensbergen res |= S_IFSOCK; 122dd6102fbSSripathi Kodi else if ((mode & P9_DMNAMEDPIPE) && (v9fs_proto_dotu(v9ses)) 1232bad8471SEric Van Hensbergen && (v9ses->nodev == 0)) 1242bad8471SEric Van Hensbergen res |= S_IFIFO; 125dd6102fbSSripathi Kodi else if ((mode & P9_DMDEVICE) && (v9fs_proto_dotu(v9ses)) 1262bad8471SEric Van Hensbergen && (v9ses->nodev == 0)) 1272bad8471SEric Van Hensbergen res |= S_IFBLK; 1282bad8471SEric Van Hensbergen else 1292bad8471SEric Van Hensbergen res |= S_IFREG; 1302bad8471SEric Van Hensbergen 131dd6102fbSSripathi Kodi if (v9fs_proto_dotu(v9ses)) { 132bd238fb4SLatchesar Ionkov if ((mode & P9_DMSETUID) == P9_DMSETUID) 1332bad8471SEric Van Hensbergen res |= S_ISUID; 1342bad8471SEric Van Hensbergen 135bd238fb4SLatchesar Ionkov if ((mode & P9_DMSETGID) == P9_DMSETGID) 1362bad8471SEric Van Hensbergen res |= S_ISGID; 137d199d652SAnthony Liguori 138d199d652SAnthony Liguori if ((mode & P9_DMSETVTX) == P9_DMSETVTX) 139d199d652SAnthony Liguori res |= S_ISVTX; 1402bad8471SEric Van Hensbergen } 1412bad8471SEric Van Hensbergen 1422bad8471SEric Van Hensbergen return res; 1432bad8471SEric Van Hensbergen } 1442bad8471SEric Van Hensbergen 145ee443996SEric Van Hensbergen /** 146ee443996SEric Van Hensbergen * v9fs_uflags2omode- convert posix open flags to plan 9 mode bits 147ee443996SEric Van Hensbergen * @uflags: flags to convert 1482e4bef41SEric Van Hensbergen * @extended: if .u extensions are active 149ee443996SEric Van Hensbergen */ 150ee443996SEric Van Hensbergen 1512e4bef41SEric Van Hensbergen int v9fs_uflags2omode(int uflags, int extended) 1526a3124a3SLatchesar Ionkov { 1536a3124a3SLatchesar Ionkov int ret; 1546a3124a3SLatchesar Ionkov 1556a3124a3SLatchesar Ionkov ret = 0; 1566a3124a3SLatchesar Ionkov switch (uflags&3) { 1576a3124a3SLatchesar Ionkov default: 1586a3124a3SLatchesar Ionkov case O_RDONLY: 159bd238fb4SLatchesar Ionkov ret = P9_OREAD; 1606a3124a3SLatchesar Ionkov break; 1616a3124a3SLatchesar Ionkov 1626a3124a3SLatchesar Ionkov case O_WRONLY: 163bd238fb4SLatchesar Ionkov ret = P9_OWRITE; 1646a3124a3SLatchesar Ionkov break; 1656a3124a3SLatchesar Ionkov 1666a3124a3SLatchesar Ionkov case O_RDWR: 167bd238fb4SLatchesar Ionkov ret = P9_ORDWR; 1686a3124a3SLatchesar Ionkov break; 1696a3124a3SLatchesar Ionkov } 1706a3124a3SLatchesar Ionkov 1716a3124a3SLatchesar Ionkov if (uflags & O_TRUNC) 172bd238fb4SLatchesar Ionkov ret |= P9_OTRUNC; 1736a3124a3SLatchesar Ionkov 1742e4bef41SEric Van Hensbergen if (extended) { 1752e4bef41SEric Van Hensbergen if (uflags & O_EXCL) 1762e4bef41SEric Van Hensbergen ret |= P9_OEXCL; 1772e4bef41SEric Van Hensbergen 1786a3124a3SLatchesar Ionkov if (uflags & O_APPEND) 179bd238fb4SLatchesar Ionkov ret |= P9_OAPPEND; 1802e4bef41SEric Van Hensbergen } 1816a3124a3SLatchesar Ionkov 1826a3124a3SLatchesar Ionkov return ret; 1836a3124a3SLatchesar Ionkov } 1846a3124a3SLatchesar Ionkov 1852bad8471SEric Van Hensbergen /** 186531b1094SLatchesar Ionkov * v9fs_blank_wstat - helper function to setup a 9P stat structure 187531b1094SLatchesar Ionkov * @wstat: structure to initialize 1882bad8471SEric Van Hensbergen * 1892bad8471SEric Van Hensbergen */ 1902bad8471SEric Van Hensbergen 1917a4439c4SM. Mohan Kumar void 192bd238fb4SLatchesar Ionkov v9fs_blank_wstat(struct p9_wstat *wstat) 1932bad8471SEric Van Hensbergen { 194531b1094SLatchesar Ionkov wstat->type = ~0; 195531b1094SLatchesar Ionkov wstat->dev = ~0; 196531b1094SLatchesar Ionkov wstat->qid.type = ~0; 197531b1094SLatchesar Ionkov wstat->qid.version = ~0; 198531b1094SLatchesar Ionkov *((long long *)&wstat->qid.path) = ~0; 199531b1094SLatchesar Ionkov wstat->mode = ~0; 200531b1094SLatchesar Ionkov wstat->atime = ~0; 201531b1094SLatchesar Ionkov wstat->mtime = ~0; 202531b1094SLatchesar Ionkov wstat->length = ~0; 203531b1094SLatchesar Ionkov wstat->name = NULL; 204531b1094SLatchesar Ionkov wstat->uid = NULL; 205531b1094SLatchesar Ionkov wstat->gid = NULL; 206531b1094SLatchesar Ionkov wstat->muid = NULL; 207531b1094SLatchesar Ionkov wstat->n_uid = ~0; 208531b1094SLatchesar Ionkov wstat->n_gid = ~0; 209531b1094SLatchesar Ionkov wstat->n_muid = ~0; 210531b1094SLatchesar Ionkov wstat->extension = NULL; 2112bad8471SEric Van Hensbergen } 2122bad8471SEric Van Hensbergen 21360e78d2cSAbhishek Kulkarni #ifdef CONFIG_9P_FSCACHE 21460e78d2cSAbhishek Kulkarni /** 21560e78d2cSAbhishek Kulkarni * v9fs_alloc_inode - helper function to allocate an inode 21660e78d2cSAbhishek Kulkarni * This callback is executed before setting up the inode so that we 21760e78d2cSAbhishek Kulkarni * can associate a vcookie with each inode. 21860e78d2cSAbhishek Kulkarni * 21960e78d2cSAbhishek Kulkarni */ 22060e78d2cSAbhishek Kulkarni 22160e78d2cSAbhishek Kulkarni struct inode *v9fs_alloc_inode(struct super_block *sb) 22260e78d2cSAbhishek Kulkarni { 22360e78d2cSAbhishek Kulkarni struct v9fs_cookie *vcookie; 22460e78d2cSAbhishek Kulkarni vcookie = (struct v9fs_cookie *)kmem_cache_alloc(vcookie_cache, 22560e78d2cSAbhishek Kulkarni GFP_KERNEL); 22660e78d2cSAbhishek Kulkarni if (!vcookie) 22760e78d2cSAbhishek Kulkarni return NULL; 22860e78d2cSAbhishek Kulkarni 22960e78d2cSAbhishek Kulkarni vcookie->fscache = NULL; 23060e78d2cSAbhishek Kulkarni vcookie->qid = NULL; 23160e78d2cSAbhishek Kulkarni spin_lock_init(&vcookie->lock); 23260e78d2cSAbhishek Kulkarni return &vcookie->inode; 23360e78d2cSAbhishek Kulkarni } 23460e78d2cSAbhishek Kulkarni 23560e78d2cSAbhishek Kulkarni /** 23660e78d2cSAbhishek Kulkarni * v9fs_destroy_inode - destroy an inode 23760e78d2cSAbhishek Kulkarni * 23860e78d2cSAbhishek Kulkarni */ 23960e78d2cSAbhishek Kulkarni 240fa0d7e3dSNick Piggin static void v9fs_i_callback(struct rcu_head *head) 241fa0d7e3dSNick Piggin { 242fa0d7e3dSNick Piggin struct inode *inode = container_of(head, struct inode, i_rcu); 243fa0d7e3dSNick Piggin INIT_LIST_HEAD(&inode->i_dentry); 244fa0d7e3dSNick Piggin kmem_cache_free(vcookie_cache, v9fs_inode2cookie(inode)); 245fa0d7e3dSNick Piggin } 246fa0d7e3dSNick Piggin 24760e78d2cSAbhishek Kulkarni void v9fs_destroy_inode(struct inode *inode) 24860e78d2cSAbhishek Kulkarni { 249fa0d7e3dSNick Piggin call_rcu(&inode->i_rcu, v9fs_i_callback); 25060e78d2cSAbhishek Kulkarni } 25160e78d2cSAbhishek Kulkarni #endif 25260e78d2cSAbhishek Kulkarni 2532bad8471SEric Van Hensbergen /** 25409d34ee5SEric Van Hensbergen * v9fs_get_fsgid_for_create - Helper function to get the gid for creating a 25509d34ee5SEric Van Hensbergen * new file system object. This checks the S_ISGID to determine the owning 25609d34ee5SEric Van Hensbergen * group of the new file system object. 25709d34ee5SEric Van Hensbergen */ 25809d34ee5SEric Van Hensbergen 25909d34ee5SEric Van Hensbergen static gid_t v9fs_get_fsgid_for_create(struct inode *dir_inode) 26009d34ee5SEric Van Hensbergen { 26109d34ee5SEric Van Hensbergen BUG_ON(dir_inode == NULL); 26209d34ee5SEric Van Hensbergen 26309d34ee5SEric Van Hensbergen if (dir_inode->i_mode & S_ISGID) { 26409d34ee5SEric Van Hensbergen /* set_gid bit is set.*/ 26509d34ee5SEric Van Hensbergen return dir_inode->i_gid; 26609d34ee5SEric Van Hensbergen } 26709d34ee5SEric Van Hensbergen return current_fsgid(); 26809d34ee5SEric Van Hensbergen } 26909d34ee5SEric Van Hensbergen 27009d34ee5SEric Van Hensbergen /** 27109d34ee5SEric Van Hensbergen * v9fs_dentry_from_dir_inode - helper function to get the dentry from 27209d34ee5SEric Van Hensbergen * dir inode. 27309d34ee5SEric Van Hensbergen * 27409d34ee5SEric Van Hensbergen */ 27509d34ee5SEric Van Hensbergen 276ea137533SEric Van Hensbergen static struct dentry *v9fs_dentry_from_dir_inode(struct inode *inode) 27709d34ee5SEric Van Hensbergen { 27809d34ee5SEric Van Hensbergen struct dentry *dentry; 27909d34ee5SEric Van Hensbergen 280b23fb0a6SNick Piggin spin_lock(&dcache_inode_lock); 28109d34ee5SEric Van Hensbergen /* Directory should have only one entry. */ 28209d34ee5SEric Van Hensbergen BUG_ON(S_ISDIR(inode->i_mode) && !list_is_singular(&inode->i_dentry)); 28309d34ee5SEric Van Hensbergen dentry = list_entry(inode->i_dentry.next, struct dentry, d_alias); 284b23fb0a6SNick Piggin spin_unlock(&dcache_inode_lock); 28509d34ee5SEric Van Hensbergen return dentry; 28609d34ee5SEric Van Hensbergen } 28709d34ee5SEric Van Hensbergen 28809d34ee5SEric Van Hensbergen /** 2892bad8471SEric Van Hensbergen * v9fs_get_inode - helper function to setup an inode 2902bad8471SEric Van Hensbergen * @sb: superblock 2912bad8471SEric Van Hensbergen * @mode: mode to setup inode with 2922bad8471SEric Van Hensbergen * 2932bad8471SEric Van Hensbergen */ 2942bad8471SEric Van Hensbergen 2952bad8471SEric Van Hensbergen struct inode *v9fs_get_inode(struct super_block *sb, int mode) 2962bad8471SEric Van Hensbergen { 2972bb54115SAbhishek Kulkarni int err; 2986a3124a3SLatchesar Ionkov struct inode *inode; 299b501611aSEric Van Hensbergen struct v9fs_session_info *v9ses = sb->s_fs_info; 3002bad8471SEric Van Hensbergen 301bd238fb4SLatchesar Ionkov P9_DPRINTK(P9_DEBUG_VFS, "super block: %p mode: %o\n", sb, mode); 3022bad8471SEric Van Hensbergen 3032bad8471SEric Van Hensbergen inode = new_inode(sb); 3042bb54115SAbhishek Kulkarni if (!inode) { 3052bb54115SAbhishek Kulkarni P9_EPRINTK(KERN_WARNING, "Problem allocating inode\n"); 30648559b4cSAbhishek Kulkarni return ERR_PTR(-ENOMEM); 3072bb54115SAbhishek Kulkarni } 3082bb54115SAbhishek Kulkarni 309217f206dSDmitry Monakhov inode_init_owner(inode, NULL, mode); 3102bad8471SEric Van Hensbergen inode->i_blocks = 0; 3112bad8471SEric Van Hensbergen inode->i_rdev = 0; 3122bad8471SEric Van Hensbergen inode->i_atime = inode->i_mtime = inode->i_ctime = CURRENT_TIME; 313147b31cfSEric Van Hensbergen inode->i_mapping->a_ops = &v9fs_addr_operations; 3142bad8471SEric Van Hensbergen 3152bad8471SEric Van Hensbergen switch (mode & S_IFMT) { 3162bad8471SEric Van Hensbergen case S_IFIFO: 3172bad8471SEric Van Hensbergen case S_IFBLK: 3182bad8471SEric Van Hensbergen case S_IFCHR: 3192bad8471SEric Van Hensbergen case S_IFSOCK: 3204b43516aSM. Mohan Kumar if (v9fs_proto_dotl(v9ses)) { 3214b43516aSM. Mohan Kumar inode->i_op = &v9fs_file_inode_operations_dotl; 3224b43516aSM. Mohan Kumar inode->i_fop = &v9fs_file_operations_dotl; 3234b43516aSM. Mohan Kumar } else if (v9fs_proto_dotu(v9ses)) { 3244b43516aSM. Mohan Kumar inode->i_op = &v9fs_file_inode_operations; 3254b43516aSM. Mohan Kumar inode->i_fop = &v9fs_file_operations; 3264b43516aSM. Mohan Kumar } else { 327bd238fb4SLatchesar Ionkov P9_DPRINTK(P9_DEBUG_ERROR, 328bd238fb4SLatchesar Ionkov "special files without extended mode\n"); 3292bb54115SAbhishek Kulkarni err = -EINVAL; 3302bb54115SAbhishek Kulkarni goto error; 331b501611aSEric Van Hensbergen } 3322bb54115SAbhishek Kulkarni init_special_inode(inode, inode->i_mode, inode->i_rdev); 3335d58bec5SEric Van Hensbergen break; 3342bad8471SEric Van Hensbergen case S_IFREG: 3359b6533c9SSripathi Kodi if (v9fs_proto_dotl(v9ses)) { 3369b6533c9SSripathi Kodi inode->i_op = &v9fs_file_inode_operations_dotl; 3379b6533c9SSripathi Kodi inode->i_fop = &v9fs_file_operations_dotl; 3389b6533c9SSripathi Kodi } else { 3392bad8471SEric Van Hensbergen inode->i_op = &v9fs_file_inode_operations; 3402bad8471SEric Van Hensbergen inode->i_fop = &v9fs_file_operations; 3419b6533c9SSripathi Kodi } 3429b6533c9SSripathi Kodi 3432bad8471SEric Van Hensbergen break; 3449b6533c9SSripathi Kodi 345b501611aSEric Van Hensbergen case S_IFLNK: 3469b6533c9SSripathi Kodi if (!v9fs_proto_dotu(v9ses) && !v9fs_proto_dotl(v9ses)) { 3479b6533c9SSripathi Kodi P9_DPRINTK(P9_DEBUG_ERROR, "extended modes used with " 3489b6533c9SSripathi Kodi "legacy protocol.\n"); 3492bb54115SAbhishek Kulkarni err = -EINVAL; 3502bb54115SAbhishek Kulkarni goto error; 351b501611aSEric Van Hensbergen } 3529b6533c9SSripathi Kodi 3539b6533c9SSripathi Kodi if (v9fs_proto_dotl(v9ses)) 3549b6533c9SSripathi Kodi inode->i_op = &v9fs_symlink_inode_operations_dotl; 3559b6533c9SSripathi Kodi else 356b501611aSEric Van Hensbergen inode->i_op = &v9fs_symlink_inode_operations; 3579b6533c9SSripathi Kodi 358b501611aSEric Van Hensbergen break; 3592bad8471SEric Van Hensbergen case S_IFDIR: 360d8c76e6fSDave Hansen inc_nlink(inode); 3619b6533c9SSripathi Kodi if (v9fs_proto_dotl(v9ses)) 3629b6533c9SSripathi Kodi inode->i_op = &v9fs_dir_inode_operations_dotl; 3639b6533c9SSripathi Kodi else if (v9fs_proto_dotu(v9ses)) 3649b6533c9SSripathi Kodi inode->i_op = &v9fs_dir_inode_operations_dotu; 365b501611aSEric Van Hensbergen else 3662bad8471SEric Van Hensbergen inode->i_op = &v9fs_dir_inode_operations; 3679b6533c9SSripathi Kodi 3689b6533c9SSripathi Kodi if (v9fs_proto_dotl(v9ses)) 3699b6533c9SSripathi Kodi inode->i_fop = &v9fs_dir_operations_dotl; 3709b6533c9SSripathi Kodi else 3712bad8471SEric Van Hensbergen inode->i_fop = &v9fs_dir_operations; 3729b6533c9SSripathi Kodi 3732bad8471SEric Van Hensbergen break; 3742bad8471SEric Van Hensbergen default: 3752bb54115SAbhishek Kulkarni P9_DPRINTK(P9_DEBUG_ERROR, "BAD mode 0x%x S_IFMT 0x%x\n", 3762bad8471SEric Van Hensbergen mode, mode & S_IFMT); 3772bb54115SAbhishek Kulkarni err = -EINVAL; 3782bb54115SAbhishek Kulkarni goto error; 3792bad8471SEric Van Hensbergen } 3802bb54115SAbhishek Kulkarni 3812bad8471SEric Van Hensbergen return inode; 3822bb54115SAbhishek Kulkarni 3832bb54115SAbhishek Kulkarni error: 3842bb54115SAbhishek Kulkarni iput(inode); 3852bb54115SAbhishek Kulkarni return ERR_PTR(err); 3862bad8471SEric Van Hensbergen } 3872bad8471SEric Van Hensbergen 388bd238fb4SLatchesar Ionkov /* 3896a3124a3SLatchesar Ionkov static struct v9fs_fid* 3906a3124a3SLatchesar Ionkov v9fs_clone_walk(struct v9fs_session_info *v9ses, u32 fid, struct dentry *dentry) 3916a3124a3SLatchesar Ionkov { 3926a3124a3SLatchesar Ionkov int err; 393736c4b85SMika Kukkonen int nfid; 3946a3124a3SLatchesar Ionkov struct v9fs_fid *ret; 3956a3124a3SLatchesar Ionkov struct v9fs_fcall *fcall; 3960b8dd177SLatchesar Ionkov 3976a3124a3SLatchesar Ionkov nfid = v9fs_get_idpool(&v9ses->fidpool); 3986a3124a3SLatchesar Ionkov if (nfid < 0) { 3990b8dd177SLatchesar Ionkov eprintk(KERN_WARNING, "no free fids available\n"); 400731805b4SLatchesar Ionkov return ERR_PTR(-ENOSPC); 4010b8dd177SLatchesar Ionkov } 4020b8dd177SLatchesar Ionkov 4036a3124a3SLatchesar Ionkov err = v9fs_t_walk(v9ses, fid, nfid, (char *) dentry->d_name.name, 4046a3124a3SLatchesar Ionkov &fcall); 4056a3124a3SLatchesar Ionkov 4066a3124a3SLatchesar Ionkov if (err < 0) { 40741e5a6acSLatchesar Ionkov if (fcall && fcall->id == RWALK) 40841e5a6acSLatchesar Ionkov goto clunk_fid; 40941e5a6acSLatchesar Ionkov 4106a3124a3SLatchesar Ionkov PRINT_FCALL_ERROR("walk error", fcall); 4116a3124a3SLatchesar Ionkov v9fs_put_idpool(nfid, &v9ses->fidpool); 4126a3124a3SLatchesar Ionkov goto error; 4130b8dd177SLatchesar Ionkov } 4146a3124a3SLatchesar Ionkov 4153cf6429aSLatchesar Ionkov kfree(fcall); 4163cf6429aSLatchesar Ionkov fcall = NULL; 4176a3124a3SLatchesar Ionkov ret = v9fs_fid_create(v9ses, nfid); 4186a3124a3SLatchesar Ionkov if (!ret) { 4196a3124a3SLatchesar Ionkov err = -ENOMEM; 4206a3124a3SLatchesar Ionkov goto clunk_fid; 4210b8dd177SLatchesar Ionkov } 4222bad8471SEric Van Hensbergen 4236a3124a3SLatchesar Ionkov err = v9fs_fid_insert(ret, dentry); 4246a3124a3SLatchesar Ionkov if (err < 0) { 4256a3124a3SLatchesar Ionkov v9fs_fid_destroy(ret); 4266a3124a3SLatchesar Ionkov goto clunk_fid; 4276a3124a3SLatchesar Ionkov } 4282bad8471SEric Van Hensbergen 4296a3124a3SLatchesar Ionkov return ret; 4306a3124a3SLatchesar Ionkov 4316a3124a3SLatchesar Ionkov clunk_fid: 4326a3124a3SLatchesar Ionkov v9fs_t_clunk(v9ses, nfid); 4336a3124a3SLatchesar Ionkov 4346a3124a3SLatchesar Ionkov error: 4356a3124a3SLatchesar Ionkov kfree(fcall); 4366a3124a3SLatchesar Ionkov return ERR_PTR(err); 4376a3124a3SLatchesar Ionkov } 438bd238fb4SLatchesar Ionkov */ 4396a3124a3SLatchesar Ionkov 44060e78d2cSAbhishek Kulkarni 44160e78d2cSAbhishek Kulkarni /** 44260e78d2cSAbhishek Kulkarni * v9fs_clear_inode - release an inode 44360e78d2cSAbhishek Kulkarni * @inode: inode to release 44460e78d2cSAbhishek Kulkarni * 44560e78d2cSAbhishek Kulkarni */ 446b57922d9SAl Viro void v9fs_evict_inode(struct inode *inode) 44760e78d2cSAbhishek Kulkarni { 448b57922d9SAl Viro truncate_inode_pages(inode->i_mapping, 0); 449b57922d9SAl Viro end_writeback(inode); 45060e78d2cSAbhishek Kulkarni filemap_fdatawrite(inode->i_mapping); 45160e78d2cSAbhishek Kulkarni 45260e78d2cSAbhishek Kulkarni #ifdef CONFIG_9P_FSCACHE 45360e78d2cSAbhishek Kulkarni v9fs_cache_inode_put_cookie(inode); 45460e78d2cSAbhishek Kulkarni #endif 45560e78d2cSAbhishek Kulkarni } 45660e78d2cSAbhishek Kulkarni 4575174fdabSLatchesar Ionkov static struct inode * 458f0853122SSripathi Kodi v9fs_inode(struct v9fs_session_info *v9ses, struct p9_fid *fid, 4596a3124a3SLatchesar Ionkov struct super_block *sb) 4606a3124a3SLatchesar Ionkov { 4616a3124a3SLatchesar Ionkov int err, umode; 462f0853122SSripathi Kodi struct inode *ret = NULL; 46351a87c55SEric Van Hensbergen struct p9_wstat *st; 4646a3124a3SLatchesar Ionkov 465bd238fb4SLatchesar Ionkov st = p9_client_stat(fid); 46602bc3567SAbhishek Kulkarni if (IS_ERR(st)) 46702bc3567SAbhishek Kulkarni return ERR_CAST(st); 4682bad8471SEric Van Hensbergen 469bd238fb4SLatchesar Ionkov umode = p9mode2unixmode(v9ses, st->mode); 4706a3124a3SLatchesar Ionkov ret = v9fs_get_inode(sb, umode); 4716a3124a3SLatchesar Ionkov if (IS_ERR(ret)) { 4726a3124a3SLatchesar Ionkov err = PTR_ERR(ret); 4736a3124a3SLatchesar Ionkov goto error; 4742bad8471SEric Van Hensbergen } 4752bad8471SEric Van Hensbergen 476bd238fb4SLatchesar Ionkov v9fs_stat2inode(st, ret, sb); 477bd238fb4SLatchesar Ionkov ret->i_ino = v9fs_qid2ino(&st->qid); 47860e78d2cSAbhishek Kulkarni 47960e78d2cSAbhishek Kulkarni #ifdef CONFIG_9P_FSCACHE 48060e78d2cSAbhishek Kulkarni v9fs_vcookie_set_qid(ret, &st->qid); 48160e78d2cSAbhishek Kulkarni v9fs_cache_inode_get_cookie(ret); 48260e78d2cSAbhishek Kulkarni #endif 48302bc3567SAbhishek Kulkarni p9stat_free(st); 484bd238fb4SLatchesar Ionkov kfree(st); 4856a3124a3SLatchesar Ionkov return ret; 4866a3124a3SLatchesar Ionkov error: 48702bc3567SAbhishek Kulkarni p9stat_free(st); 488bd238fb4SLatchesar Ionkov kfree(st); 4896a3124a3SLatchesar Ionkov return ERR_PTR(err); 4902bad8471SEric Van Hensbergen } 4912bad8471SEric Van Hensbergen 492f0853122SSripathi Kodi static struct inode * 493f0853122SSripathi Kodi v9fs_inode_dotl(struct v9fs_session_info *v9ses, struct p9_fid *fid, 494f0853122SSripathi Kodi struct super_block *sb) 495f0853122SSripathi Kodi { 496f0853122SSripathi Kodi struct inode *ret = NULL; 497f0853122SSripathi Kodi int err; 498f0853122SSripathi Kodi struct p9_stat_dotl *st; 499f0853122SSripathi Kodi 500f0853122SSripathi Kodi st = p9_client_getattr_dotl(fid, P9_STATS_BASIC); 501f0853122SSripathi Kodi if (IS_ERR(st)) 502f0853122SSripathi Kodi return ERR_CAST(st); 503f0853122SSripathi Kodi 504f0853122SSripathi Kodi ret = v9fs_get_inode(sb, st->st_mode); 505f0853122SSripathi Kodi if (IS_ERR(ret)) { 506f0853122SSripathi Kodi err = PTR_ERR(ret); 507f0853122SSripathi Kodi goto error; 508f0853122SSripathi Kodi } 509f0853122SSripathi Kodi 510f0853122SSripathi Kodi v9fs_stat2inode_dotl(st, ret); 511f0853122SSripathi Kodi ret->i_ino = v9fs_qid2ino(&st->qid); 512f0853122SSripathi Kodi #ifdef CONFIG_9P_FSCACHE 513f0853122SSripathi Kodi v9fs_vcookie_set_qid(ret, &st->qid); 514f0853122SSripathi Kodi v9fs_cache_inode_get_cookie(ret); 515f0853122SSripathi Kodi #endif 51685ff872dSAneesh Kumar K.V err = v9fs_get_acl(ret, fid); 51785ff872dSAneesh Kumar K.V if (err) { 51885ff872dSAneesh Kumar K.V iput(ret); 51985ff872dSAneesh Kumar K.V goto error; 52085ff872dSAneesh Kumar K.V } 521f0853122SSripathi Kodi kfree(st); 522f0853122SSripathi Kodi return ret; 523f0853122SSripathi Kodi error: 524f0853122SSripathi Kodi kfree(st); 525f0853122SSripathi Kodi return ERR_PTR(err); 526f0853122SSripathi Kodi } 527f0853122SSripathi Kodi 528f0853122SSripathi Kodi /** 529f0853122SSripathi Kodi * v9fs_inode_from_fid - Helper routine to populate an inode by 530f0853122SSripathi Kodi * issuing a attribute request 531f0853122SSripathi Kodi * @v9ses: session information 532f0853122SSripathi Kodi * @fid: fid to issue attribute request for 533f0853122SSripathi Kodi * @sb: superblock on which to create inode 534f0853122SSripathi Kodi * 535f0853122SSripathi Kodi */ 536f0853122SSripathi Kodi static inline struct inode * 537f0853122SSripathi Kodi v9fs_inode_from_fid(struct v9fs_session_info *v9ses, struct p9_fid *fid, 538f0853122SSripathi Kodi struct super_block *sb) 539f0853122SSripathi Kodi { 540f0853122SSripathi Kodi if (v9fs_proto_dotl(v9ses)) 541f0853122SSripathi Kodi return v9fs_inode_dotl(v9ses, fid, sb); 542f0853122SSripathi Kodi else 543f0853122SSripathi Kodi return v9fs_inode(v9ses, fid, sb); 544f0853122SSripathi Kodi } 545f0853122SSripathi Kodi 5462bad8471SEric Van Hensbergen /** 5472bad8471SEric Van Hensbergen * v9fs_remove - helper function to remove files and directories 54873c592b9SEric Van Hensbergen * @dir: directory inode that is being deleted 54973c592b9SEric Van Hensbergen * @file: dentry that is being deleted 55073c592b9SEric Van Hensbergen * @rmdir: removing a directory 5512bad8471SEric Van Hensbergen * 5522bad8471SEric Van Hensbergen */ 5532bad8471SEric Van Hensbergen 5542bad8471SEric Van Hensbergen static int v9fs_remove(struct inode *dir, struct dentry *file, int rmdir) 5552bad8471SEric Van Hensbergen { 556d994f405SAneesh Kumar K.V int retval; 557bd238fb4SLatchesar Ionkov struct inode *file_inode; 558bd238fb4SLatchesar Ionkov struct p9_fid *v9fid; 5592bad8471SEric Van Hensbergen 560bd238fb4SLatchesar Ionkov P9_DPRINTK(P9_DEBUG_VFS, "inode: %p dentry: %p rmdir: %d\n", dir, file, 5612bad8471SEric Van Hensbergen rmdir); 5622bad8471SEric Van Hensbergen 5632bad8471SEric Van Hensbergen file_inode = file->d_inode; 564c959df9fSLatchesar Ionkov v9fid = v9fs_fid_clone(file); 565da977b2cSEric Van Hensbergen if (IS_ERR(v9fid)) 566da977b2cSEric Van Hensbergen return PTR_ERR(v9fid); 5672bad8471SEric Van Hensbergen 568d994f405SAneesh Kumar K.V retval = p9_client_remove(v9fid); 569d994f405SAneesh Kumar K.V if (!retval) 570d994f405SAneesh Kumar K.V drop_nlink(file_inode); 571d994f405SAneesh Kumar K.V return retval; 5722bad8471SEric Van Hensbergen } 5732bad8471SEric Van Hensbergen 574bd238fb4SLatchesar Ionkov /** 575bd238fb4SLatchesar Ionkov * v9fs_create - Create a file 576ee443996SEric Van Hensbergen * @v9ses: session information 577ee443996SEric Van Hensbergen * @dir: directory that dentry is being created in 578bd238fb4SLatchesar Ionkov * @dentry: dentry that is being created 5790e15597eSAbhishek Kulkarni * @extension: 9p2000.u extension string to support devices, etc. 580bd238fb4SLatchesar Ionkov * @perm: create permissions 581bd238fb4SLatchesar Ionkov * @mode: open mode 582bd238fb4SLatchesar Ionkov * 583bd238fb4SLatchesar Ionkov */ 584bd238fb4SLatchesar Ionkov static struct p9_fid * 585bd238fb4SLatchesar Ionkov v9fs_create(struct v9fs_session_info *v9ses, struct inode *dir, 586bd238fb4SLatchesar Ionkov struct dentry *dentry, char *extension, u32 perm, u8 mode) 587bd238fb4SLatchesar Ionkov { 588bd238fb4SLatchesar Ionkov int err; 589bd238fb4SLatchesar Ionkov char *name; 590bd238fb4SLatchesar Ionkov struct p9_fid *dfid, *ofid, *fid; 591bd238fb4SLatchesar Ionkov struct inode *inode; 592bd238fb4SLatchesar Ionkov 59351a87c55SEric Van Hensbergen P9_DPRINTK(P9_DEBUG_VFS, "name %s\n", dentry->d_name.name); 59451a87c55SEric Van Hensbergen 595bd238fb4SLatchesar Ionkov err = 0; 596bd238fb4SLatchesar Ionkov ofid = NULL; 597bd238fb4SLatchesar Ionkov fid = NULL; 598bd238fb4SLatchesar Ionkov name = (char *) dentry->d_name.name; 5996d27e64dSVenkateswararao Jujjuri dfid = v9fs_fid_lookup(dentry->d_parent); 600bd238fb4SLatchesar Ionkov if (IS_ERR(dfid)) { 601bd238fb4SLatchesar Ionkov err = PTR_ERR(dfid); 6026d27e64dSVenkateswararao Jujjuri P9_DPRINTK(P9_DEBUG_VFS, "fid lookup failed %d\n", err); 6036d27e64dSVenkateswararao Jujjuri return ERR_PTR(err); 604bd238fb4SLatchesar Ionkov } 605bd238fb4SLatchesar Ionkov 606bd238fb4SLatchesar Ionkov /* clone a fid to use for creation */ 607bd238fb4SLatchesar Ionkov ofid = p9_client_walk(dfid, 0, NULL, 1); 608bd238fb4SLatchesar Ionkov if (IS_ERR(ofid)) { 609bd238fb4SLatchesar Ionkov err = PTR_ERR(ofid); 61051a87c55SEric Van Hensbergen P9_DPRINTK(P9_DEBUG_VFS, "p9_client_walk failed %d\n", err); 6116d27e64dSVenkateswararao Jujjuri return ERR_PTR(err); 612bd238fb4SLatchesar Ionkov } 613bd238fb4SLatchesar Ionkov 614bd238fb4SLatchesar Ionkov err = p9_client_fcreate(ofid, name, perm, mode, extension); 61551a87c55SEric Van Hensbergen if (err < 0) { 61651a87c55SEric Van Hensbergen P9_DPRINTK(P9_DEBUG_VFS, "p9_client_fcreate failed %d\n", err); 617bd238fb4SLatchesar Ionkov goto error; 61851a87c55SEric Van Hensbergen } 619bd238fb4SLatchesar Ionkov 620bd238fb4SLatchesar Ionkov /* now walk from the parent so we can get unopened fid */ 6216d27e64dSVenkateswararao Jujjuri fid = p9_client_walk(dfid, 1, &name, 1); 622bd238fb4SLatchesar Ionkov if (IS_ERR(fid)) { 623bd238fb4SLatchesar Ionkov err = PTR_ERR(fid); 62451a87c55SEric Van Hensbergen P9_DPRINTK(P9_DEBUG_VFS, "p9_client_walk failed %d\n", err); 625bd238fb4SLatchesar Ionkov fid = NULL; 626bd238fb4SLatchesar Ionkov goto error; 6276d27e64dSVenkateswararao Jujjuri } 628bd238fb4SLatchesar Ionkov 629bd238fb4SLatchesar Ionkov /* instantiate inode and assign the unopened fid to the dentry */ 630bd238fb4SLatchesar Ionkov inode = v9fs_inode_from_fid(v9ses, fid, dir->i_sb); 631bd238fb4SLatchesar Ionkov if (IS_ERR(inode)) { 632bd238fb4SLatchesar Ionkov err = PTR_ERR(inode); 63351a87c55SEric Van Hensbergen P9_DPRINTK(P9_DEBUG_VFS, "inode creation failed %d\n", err); 634bd238fb4SLatchesar Ionkov goto error; 635bd238fb4SLatchesar Ionkov } 636bd238fb4SLatchesar Ionkov 637bd238fb4SLatchesar Ionkov if (v9ses->cache) 638bd238fb4SLatchesar Ionkov dentry->d_op = &v9fs_cached_dentry_operations; 639bd238fb4SLatchesar Ionkov else 640bd238fb4SLatchesar Ionkov dentry->d_op = &v9fs_dentry_operations; 641bd238fb4SLatchesar Ionkov 642bd238fb4SLatchesar Ionkov d_instantiate(dentry, inode); 64350fb6d2bSAbhishek Kulkarni err = v9fs_fid_add(dentry, fid); 64450fb6d2bSAbhishek Kulkarni if (err < 0) 64550fb6d2bSAbhishek Kulkarni goto error; 64650fb6d2bSAbhishek Kulkarni 647bd238fb4SLatchesar Ionkov return ofid; 648bd238fb4SLatchesar Ionkov 649bd238fb4SLatchesar Ionkov error: 650bd238fb4SLatchesar Ionkov if (ofid) 651bd238fb4SLatchesar Ionkov p9_client_clunk(ofid); 652bd238fb4SLatchesar Ionkov 653bd238fb4SLatchesar Ionkov if (fid) 654bd238fb4SLatchesar Ionkov p9_client_clunk(fid); 655bd238fb4SLatchesar Ionkov 656bd238fb4SLatchesar Ionkov return ERR_PTR(err); 657bd238fb4SLatchesar Ionkov } 658bd238fb4SLatchesar Ionkov 6592bad8471SEric Van Hensbergen /** 6605643135aSVenkateswararao Jujjuri (JV) * v9fs_vfs_create_dotl - VFS hook to create files for 9P2000.L protocol. 6615643135aSVenkateswararao Jujjuri (JV) * @dir: directory inode that is being created 6625643135aSVenkateswararao Jujjuri (JV) * @dentry: dentry that is being deleted 6635643135aSVenkateswararao Jujjuri (JV) * @mode: create permissions 6645643135aSVenkateswararao Jujjuri (JV) * @nd: path information 6655643135aSVenkateswararao Jujjuri (JV) * 6665643135aSVenkateswararao Jujjuri (JV) */ 6675643135aSVenkateswararao Jujjuri (JV) 6685643135aSVenkateswararao Jujjuri (JV) static int 669ad77dbceSAneesh Kumar K.V v9fs_vfs_create_dotl(struct inode *dir, struct dentry *dentry, int omode, 6705643135aSVenkateswararao Jujjuri (JV) struct nameidata *nd) 6715643135aSVenkateswararao Jujjuri (JV) { 6725643135aSVenkateswararao Jujjuri (JV) int err = 0; 6735643135aSVenkateswararao Jujjuri (JV) char *name = NULL; 6745643135aSVenkateswararao Jujjuri (JV) gid_t gid; 6755643135aSVenkateswararao Jujjuri (JV) int flags; 676ad77dbceSAneesh Kumar K.V mode_t mode; 6775643135aSVenkateswararao Jujjuri (JV) struct v9fs_session_info *v9ses; 6785643135aSVenkateswararao Jujjuri (JV) struct p9_fid *fid = NULL; 6795643135aSVenkateswararao Jujjuri (JV) struct p9_fid *dfid, *ofid; 6805643135aSVenkateswararao Jujjuri (JV) struct file *filp; 6815643135aSVenkateswararao Jujjuri (JV) struct p9_qid qid; 6825643135aSVenkateswararao Jujjuri (JV) struct inode *inode; 683ad77dbceSAneesh Kumar K.V struct posix_acl *pacl = NULL, *dacl = NULL; 6845643135aSVenkateswararao Jujjuri (JV) 6855643135aSVenkateswararao Jujjuri (JV) v9ses = v9fs_inode2v9ses(dir); 6865643135aSVenkateswararao Jujjuri (JV) if (nd && nd->flags & LOOKUP_OPEN) 6875643135aSVenkateswararao Jujjuri (JV) flags = nd->intent.open.flags - 1; 688f5fc6145SAneesh Kumar K.V else { 689f5fc6145SAneesh Kumar K.V /* 690f5fc6145SAneesh Kumar K.V * create call without LOOKUP_OPEN is due 691f5fc6145SAneesh Kumar K.V * to mknod of regular files. So use mknod 692f5fc6145SAneesh Kumar K.V * operation. 693f5fc6145SAneesh Kumar K.V */ 694f5fc6145SAneesh Kumar K.V return v9fs_vfs_mknod_dotl(dir, dentry, omode, 0); 695f5fc6145SAneesh Kumar K.V } 6965643135aSVenkateswararao Jujjuri (JV) 6975643135aSVenkateswararao Jujjuri (JV) name = (char *) dentry->d_name.name; 6985643135aSVenkateswararao Jujjuri (JV) P9_DPRINTK(P9_DEBUG_VFS, "v9fs_vfs_create_dotl: name:%s flags:0x%x " 699ad77dbceSAneesh Kumar K.V "mode:0x%x\n", name, flags, omode); 7005643135aSVenkateswararao Jujjuri (JV) 7015643135aSVenkateswararao Jujjuri (JV) dfid = v9fs_fid_lookup(dentry->d_parent); 7025643135aSVenkateswararao Jujjuri (JV) if (IS_ERR(dfid)) { 7035643135aSVenkateswararao Jujjuri (JV) err = PTR_ERR(dfid); 7045643135aSVenkateswararao Jujjuri (JV) P9_DPRINTK(P9_DEBUG_VFS, "fid lookup failed %d\n", err); 7055643135aSVenkateswararao Jujjuri (JV) return err; 7065643135aSVenkateswararao Jujjuri (JV) } 7075643135aSVenkateswararao Jujjuri (JV) 7085643135aSVenkateswararao Jujjuri (JV) /* clone a fid to use for creation */ 7095643135aSVenkateswararao Jujjuri (JV) ofid = p9_client_walk(dfid, 0, NULL, 1); 7105643135aSVenkateswararao Jujjuri (JV) if (IS_ERR(ofid)) { 7115643135aSVenkateswararao Jujjuri (JV) err = PTR_ERR(ofid); 7125643135aSVenkateswararao Jujjuri (JV) P9_DPRINTK(P9_DEBUG_VFS, "p9_client_walk failed %d\n", err); 7135643135aSVenkateswararao Jujjuri (JV) return err; 7145643135aSVenkateswararao Jujjuri (JV) } 7155643135aSVenkateswararao Jujjuri (JV) 7165643135aSVenkateswararao Jujjuri (JV) gid = v9fs_get_fsgid_for_create(dir); 717ad77dbceSAneesh Kumar K.V 718ad77dbceSAneesh Kumar K.V mode = omode; 719ad77dbceSAneesh Kumar K.V /* Update mode based on ACL value */ 720ad77dbceSAneesh Kumar K.V err = v9fs_acl_mode(dir, &mode, &dacl, &pacl); 721ad77dbceSAneesh Kumar K.V if (err) { 722ad77dbceSAneesh Kumar K.V P9_DPRINTK(P9_DEBUG_VFS, 723ad77dbceSAneesh Kumar K.V "Failed to get acl values in creat %d\n", err); 724ad77dbceSAneesh Kumar K.V goto error; 725ad77dbceSAneesh Kumar K.V } 7265643135aSVenkateswararao Jujjuri (JV) err = p9_client_create_dotl(ofid, name, flags, mode, gid, &qid); 7275643135aSVenkateswararao Jujjuri (JV) if (err < 0) { 7285643135aSVenkateswararao Jujjuri (JV) P9_DPRINTK(P9_DEBUG_VFS, 7295643135aSVenkateswararao Jujjuri (JV) "p9_client_open_dotl failed in creat %d\n", 7305643135aSVenkateswararao Jujjuri (JV) err); 7315643135aSVenkateswararao Jujjuri (JV) goto error; 7325643135aSVenkateswararao Jujjuri (JV) } 733ad77dbceSAneesh Kumar K.V /* instantiate inode and assign the unopened fid to the dentry */ 734ad77dbceSAneesh Kumar K.V if (v9ses->cache == CACHE_LOOSE || v9ses->cache == CACHE_FSCACHE || 735ad77dbceSAneesh Kumar K.V (nd && nd->flags & LOOKUP_OPEN)) { 7365643135aSVenkateswararao Jujjuri (JV) fid = p9_client_walk(dfid, 1, &name, 1); 7375643135aSVenkateswararao Jujjuri (JV) if (IS_ERR(fid)) { 7385643135aSVenkateswararao Jujjuri (JV) err = PTR_ERR(fid); 739ad77dbceSAneesh Kumar K.V P9_DPRINTK(P9_DEBUG_VFS, "p9_client_walk failed %d\n", 740ad77dbceSAneesh Kumar K.V err); 7415643135aSVenkateswararao Jujjuri (JV) fid = NULL; 7425643135aSVenkateswararao Jujjuri (JV) goto error; 7435643135aSVenkateswararao Jujjuri (JV) } 7445643135aSVenkateswararao Jujjuri (JV) 7455643135aSVenkateswararao Jujjuri (JV) inode = v9fs_inode_from_fid(v9ses, fid, dir->i_sb); 7465643135aSVenkateswararao Jujjuri (JV) if (IS_ERR(inode)) { 7475643135aSVenkateswararao Jujjuri (JV) err = PTR_ERR(inode); 748ad77dbceSAneesh Kumar K.V P9_DPRINTK(P9_DEBUG_VFS, "inode creation failed %d\n", 749ad77dbceSAneesh Kumar K.V err); 7505643135aSVenkateswararao Jujjuri (JV) goto error; 7515643135aSVenkateswararao Jujjuri (JV) } 7525643135aSVenkateswararao Jujjuri (JV) dentry->d_op = &v9fs_cached_dentry_operations; 7535643135aSVenkateswararao Jujjuri (JV) d_instantiate(dentry, inode); 7545643135aSVenkateswararao Jujjuri (JV) err = v9fs_fid_add(dentry, fid); 7555643135aSVenkateswararao Jujjuri (JV) if (err < 0) 7565643135aSVenkateswararao Jujjuri (JV) goto error; 757ad77dbceSAneesh Kumar K.V /* The fid would get clunked via a dput */ 758ad77dbceSAneesh Kumar K.V fid = NULL; 759ad77dbceSAneesh Kumar K.V } else { 760ad77dbceSAneesh Kumar K.V /* 761ad77dbceSAneesh Kumar K.V * Not in cached mode. No need to populate 762ad77dbceSAneesh Kumar K.V * inode with stat. We need to get an inode 763ad77dbceSAneesh Kumar K.V * so that we can set the acl with dentry 764ad77dbceSAneesh Kumar K.V */ 765ad77dbceSAneesh Kumar K.V inode = v9fs_get_inode(dir->i_sb, mode); 766ad77dbceSAneesh Kumar K.V if (IS_ERR(inode)) { 767ad77dbceSAneesh Kumar K.V err = PTR_ERR(inode); 768ad77dbceSAneesh Kumar K.V goto error; 769ad77dbceSAneesh Kumar K.V } 770ad77dbceSAneesh Kumar K.V dentry->d_op = &v9fs_dentry_operations; 771ad77dbceSAneesh Kumar K.V d_instantiate(dentry, inode); 772ad77dbceSAneesh Kumar K.V } 773ad77dbceSAneesh Kumar K.V /* Now set the ACL based on the default value */ 774ad77dbceSAneesh Kumar K.V v9fs_set_create_acl(dentry, dacl, pacl); 7755643135aSVenkateswararao Jujjuri (JV) 7765643135aSVenkateswararao Jujjuri (JV) /* if we are opening a file, assign the open fid to the file */ 7775643135aSVenkateswararao Jujjuri (JV) if (nd && nd->flags & LOOKUP_OPEN) { 778877cb3d4SAneesh Kumar K.V filp = lookup_instantiate_filp(nd, dentry, generic_file_open); 7795643135aSVenkateswararao Jujjuri (JV) if (IS_ERR(filp)) { 7805643135aSVenkateswararao Jujjuri (JV) p9_client_clunk(ofid); 7815643135aSVenkateswararao Jujjuri (JV) return PTR_ERR(filp); 7825643135aSVenkateswararao Jujjuri (JV) } 7835643135aSVenkateswararao Jujjuri (JV) filp->private_data = ofid; 7845643135aSVenkateswararao Jujjuri (JV) } else 7855643135aSVenkateswararao Jujjuri (JV) p9_client_clunk(ofid); 7865643135aSVenkateswararao Jujjuri (JV) 7875643135aSVenkateswararao Jujjuri (JV) return 0; 7885643135aSVenkateswararao Jujjuri (JV) 7895643135aSVenkateswararao Jujjuri (JV) error: 7905643135aSVenkateswararao Jujjuri (JV) if (ofid) 7915643135aSVenkateswararao Jujjuri (JV) p9_client_clunk(ofid); 7925643135aSVenkateswararao Jujjuri (JV) if (fid) 7935643135aSVenkateswararao Jujjuri (JV) p9_client_clunk(fid); 7945643135aSVenkateswararao Jujjuri (JV) return err; 7955643135aSVenkateswararao Jujjuri (JV) } 7965643135aSVenkateswararao Jujjuri (JV) 7975643135aSVenkateswararao Jujjuri (JV) /** 7982bad8471SEric Van Hensbergen * v9fs_vfs_create - VFS hook to create files 799ee443996SEric Van Hensbergen * @dir: directory inode that is being created 8002bad8471SEric Van Hensbergen * @dentry: dentry that is being deleted 8016a3124a3SLatchesar Ionkov * @mode: create permissions 8022bad8471SEric Van Hensbergen * @nd: path information 8032bad8471SEric Van Hensbergen * 8042bad8471SEric Van Hensbergen */ 8052bad8471SEric Van Hensbergen 8062bad8471SEric Van Hensbergen static int 8076a3124a3SLatchesar Ionkov v9fs_vfs_create(struct inode *dir, struct dentry *dentry, int mode, 8082bad8471SEric Van Hensbergen struct nameidata *nd) 8092bad8471SEric Van Hensbergen { 8106a3124a3SLatchesar Ionkov int err; 811bd238fb4SLatchesar Ionkov u32 perm; 8126a3124a3SLatchesar Ionkov int flags; 8136a3124a3SLatchesar Ionkov struct v9fs_session_info *v9ses; 814bd238fb4SLatchesar Ionkov struct p9_fid *fid; 8156a3124a3SLatchesar Ionkov struct file *filp; 8166a3124a3SLatchesar Ionkov 817bd238fb4SLatchesar Ionkov err = 0; 818bd238fb4SLatchesar Ionkov fid = NULL; 8196a3124a3SLatchesar Ionkov v9ses = v9fs_inode2v9ses(dir); 820da977b2cSEric Van Hensbergen perm = unixmode2p9mode(v9ses, mode); 8216a3124a3SLatchesar Ionkov if (nd && nd->flags & LOOKUP_OPEN) 8226a3124a3SLatchesar Ionkov flags = nd->intent.open.flags - 1; 8236a3124a3SLatchesar Ionkov else 8246a3124a3SLatchesar Ionkov flags = O_RDWR; 8256a3124a3SLatchesar Ionkov 826bd238fb4SLatchesar Ionkov fid = v9fs_create(v9ses, dir, dentry, NULL, perm, 827dd6102fbSSripathi Kodi v9fs_uflags2omode(flags, 828dd6102fbSSripathi Kodi v9fs_proto_dotu(v9ses))); 829bd238fb4SLatchesar Ionkov if (IS_ERR(fid)) { 830bd238fb4SLatchesar Ionkov err = PTR_ERR(fid); 831bd238fb4SLatchesar Ionkov fid = NULL; 8326a3124a3SLatchesar Ionkov goto error; 8336a3124a3SLatchesar Ionkov } 8346a3124a3SLatchesar Ionkov 835bd238fb4SLatchesar Ionkov /* if we are opening a file, assign the open fid to the file */ 8366a3124a3SLatchesar Ionkov if (nd && nd->flags & LOOKUP_OPEN) { 837877cb3d4SAneesh Kumar K.V filp = lookup_instantiate_filp(nd, dentry, generic_file_open); 8386a3124a3SLatchesar Ionkov if (IS_ERR(filp)) { 839bd238fb4SLatchesar Ionkov err = PTR_ERR(filp); 840bd238fb4SLatchesar Ionkov goto error; 8416a3124a3SLatchesar Ionkov } 8426a3124a3SLatchesar Ionkov 843bd238fb4SLatchesar Ionkov filp->private_data = fid; 844bd238fb4SLatchesar Ionkov } else 845bd238fb4SLatchesar Ionkov p9_client_clunk(fid); 8466a3124a3SLatchesar Ionkov 8476a3124a3SLatchesar Ionkov return 0; 8486a3124a3SLatchesar Ionkov 8496a3124a3SLatchesar Ionkov error: 850bd238fb4SLatchesar Ionkov if (fid) 851bd238fb4SLatchesar Ionkov p9_client_clunk(fid); 8526a3124a3SLatchesar Ionkov 8536a3124a3SLatchesar Ionkov return err; 8542bad8471SEric Van Hensbergen } 8552bad8471SEric Van Hensbergen 8562bad8471SEric Van Hensbergen /** 8572bad8471SEric Van Hensbergen * v9fs_vfs_mkdir - VFS mkdir hook to create a directory 858ee443996SEric Van Hensbergen * @dir: inode that is being unlinked 8592bad8471SEric Van Hensbergen * @dentry: dentry that is being unlinked 8602bad8471SEric Van Hensbergen * @mode: mode for new directory 8612bad8471SEric Van Hensbergen * 8622bad8471SEric Van Hensbergen */ 8632bad8471SEric Van Hensbergen 8646a3124a3SLatchesar Ionkov static int v9fs_vfs_mkdir(struct inode *dir, struct dentry *dentry, int mode) 8652bad8471SEric Van Hensbergen { 8666a3124a3SLatchesar Ionkov int err; 867bd238fb4SLatchesar Ionkov u32 perm; 8686a3124a3SLatchesar Ionkov struct v9fs_session_info *v9ses; 869bd238fb4SLatchesar Ionkov struct p9_fid *fid; 8706a3124a3SLatchesar Ionkov 871bd238fb4SLatchesar Ionkov P9_DPRINTK(P9_DEBUG_VFS, "name %s\n", dentry->d_name.name); 872bd238fb4SLatchesar Ionkov err = 0; 8736a3124a3SLatchesar Ionkov v9ses = v9fs_inode2v9ses(dir); 8746a3124a3SLatchesar Ionkov perm = unixmode2p9mode(v9ses, mode | S_IFDIR); 875bd238fb4SLatchesar Ionkov fid = v9fs_create(v9ses, dir, dentry, NULL, perm, P9_OREAD); 876bd238fb4SLatchesar Ionkov if (IS_ERR(fid)) { 877bd238fb4SLatchesar Ionkov err = PTR_ERR(fid); 878bd238fb4SLatchesar Ionkov fid = NULL; 8796a3124a3SLatchesar Ionkov } 8806a3124a3SLatchesar Ionkov 881bd238fb4SLatchesar Ionkov if (fid) 882bd238fb4SLatchesar Ionkov p9_client_clunk(fid); 8836a3124a3SLatchesar Ionkov 8846a3124a3SLatchesar Ionkov return err; 8852bad8471SEric Van Hensbergen } 8862bad8471SEric Van Hensbergen 88701a622bdSM. Mohan Kumar 88801a622bdSM. Mohan Kumar /** 88901a622bdSM. Mohan Kumar * v9fs_vfs_mkdir_dotl - VFS mkdir hook to create a directory 89001a622bdSM. Mohan Kumar * @dir: inode that is being unlinked 89101a622bdSM. Mohan Kumar * @dentry: dentry that is being unlinked 89201a622bdSM. Mohan Kumar * @mode: mode for new directory 89301a622bdSM. Mohan Kumar * 89401a622bdSM. Mohan Kumar */ 89501a622bdSM. Mohan Kumar 896ad77dbceSAneesh Kumar K.V static int v9fs_vfs_mkdir_dotl(struct inode *dir, 897ad77dbceSAneesh Kumar K.V struct dentry *dentry, int omode) 89801a622bdSM. Mohan Kumar { 89901a622bdSM. Mohan Kumar int err; 90001a622bdSM. Mohan Kumar struct v9fs_session_info *v9ses; 90101a622bdSM. Mohan Kumar struct p9_fid *fid = NULL, *dfid = NULL; 90201a622bdSM. Mohan Kumar gid_t gid; 90301a622bdSM. Mohan Kumar char *name; 904ad77dbceSAneesh Kumar K.V mode_t mode; 90501a622bdSM. Mohan Kumar struct inode *inode; 90601a622bdSM. Mohan Kumar struct p9_qid qid; 90701a622bdSM. Mohan Kumar struct dentry *dir_dentry; 908ad77dbceSAneesh Kumar K.V struct posix_acl *dacl = NULL, *pacl = NULL; 90901a622bdSM. Mohan Kumar 91001a622bdSM. Mohan Kumar P9_DPRINTK(P9_DEBUG_VFS, "name %s\n", dentry->d_name.name); 91101a622bdSM. Mohan Kumar err = 0; 91201a622bdSM. Mohan Kumar v9ses = v9fs_inode2v9ses(dir); 91301a622bdSM. Mohan Kumar 914ad77dbceSAneesh Kumar K.V omode |= S_IFDIR; 9157c7298cfSHarsh Prateek Bora if (dir->i_mode & S_ISGID) 916ad77dbceSAneesh Kumar K.V omode |= S_ISGID; 917ad77dbceSAneesh Kumar K.V 91801a622bdSM. Mohan Kumar dir_dentry = v9fs_dentry_from_dir_inode(dir); 91901a622bdSM. Mohan Kumar dfid = v9fs_fid_lookup(dir_dentry); 92001a622bdSM. Mohan Kumar if (IS_ERR(dfid)) { 92101a622bdSM. Mohan Kumar err = PTR_ERR(dfid); 92201a622bdSM. Mohan Kumar P9_DPRINTK(P9_DEBUG_VFS, "fid lookup failed %d\n", err); 92301a622bdSM. Mohan Kumar dfid = NULL; 92401a622bdSM. Mohan Kumar goto error; 92501a622bdSM. Mohan Kumar } 92601a622bdSM. Mohan Kumar 92701a622bdSM. Mohan Kumar gid = v9fs_get_fsgid_for_create(dir); 928ad77dbceSAneesh Kumar K.V mode = omode; 929ad77dbceSAneesh Kumar K.V /* Update mode based on ACL value */ 930ad77dbceSAneesh Kumar K.V err = v9fs_acl_mode(dir, &mode, &dacl, &pacl); 931ad77dbceSAneesh Kumar K.V if (err) { 932ad77dbceSAneesh Kumar K.V P9_DPRINTK(P9_DEBUG_VFS, 933ad77dbceSAneesh Kumar K.V "Failed to get acl values in mkdir %d\n", err); 934ad77dbceSAneesh Kumar K.V goto error; 935ad77dbceSAneesh Kumar K.V } 93601a622bdSM. Mohan Kumar name = (char *) dentry->d_name.name; 93701a622bdSM. Mohan Kumar err = p9_client_mkdir_dotl(dfid, name, mode, gid, &qid); 93801a622bdSM. Mohan Kumar if (err < 0) 93901a622bdSM. Mohan Kumar goto error; 94001a622bdSM. Mohan Kumar 94101a622bdSM. Mohan Kumar /* instantiate inode and assign the unopened fid to the dentry */ 94201a622bdSM. Mohan Kumar if (v9ses->cache == CACHE_LOOSE || v9ses->cache == CACHE_FSCACHE) { 94301a622bdSM. Mohan Kumar fid = p9_client_walk(dfid, 1, &name, 1); 94401a622bdSM. Mohan Kumar if (IS_ERR(fid)) { 94501a622bdSM. Mohan Kumar err = PTR_ERR(fid); 94601a622bdSM. Mohan Kumar P9_DPRINTK(P9_DEBUG_VFS, "p9_client_walk failed %d\n", 94701a622bdSM. Mohan Kumar err); 94801a622bdSM. Mohan Kumar fid = NULL; 94901a622bdSM. Mohan Kumar goto error; 95001a622bdSM. Mohan Kumar } 95101a622bdSM. Mohan Kumar 95201a622bdSM. Mohan Kumar inode = v9fs_inode_from_fid(v9ses, fid, dir->i_sb); 95301a622bdSM. Mohan Kumar if (IS_ERR(inode)) { 95401a622bdSM. Mohan Kumar err = PTR_ERR(inode); 95501a622bdSM. Mohan Kumar P9_DPRINTK(P9_DEBUG_VFS, "inode creation failed %d\n", 95601a622bdSM. Mohan Kumar err); 95701a622bdSM. Mohan Kumar goto error; 95801a622bdSM. Mohan Kumar } 95901a622bdSM. Mohan Kumar dentry->d_op = &v9fs_cached_dentry_operations; 96001a622bdSM. Mohan Kumar d_instantiate(dentry, inode); 96101a622bdSM. Mohan Kumar err = v9fs_fid_add(dentry, fid); 96201a622bdSM. Mohan Kumar if (err < 0) 96301a622bdSM. Mohan Kumar goto error; 96401a622bdSM. Mohan Kumar fid = NULL; 965ad77dbceSAneesh Kumar K.V } else { 966ad77dbceSAneesh Kumar K.V /* 967ad77dbceSAneesh Kumar K.V * Not in cached mode. No need to populate 968ad77dbceSAneesh Kumar K.V * inode with stat. We need to get an inode 969ad77dbceSAneesh Kumar K.V * so that we can set the acl with dentry 970ad77dbceSAneesh Kumar K.V */ 971ad77dbceSAneesh Kumar K.V inode = v9fs_get_inode(dir->i_sb, mode); 972ad77dbceSAneesh Kumar K.V if (IS_ERR(inode)) { 973ad77dbceSAneesh Kumar K.V err = PTR_ERR(inode); 974ad77dbceSAneesh Kumar K.V goto error; 97501a622bdSM. Mohan Kumar } 976ad77dbceSAneesh Kumar K.V dentry->d_op = &v9fs_dentry_operations; 977ad77dbceSAneesh Kumar K.V d_instantiate(dentry, inode); 978ad77dbceSAneesh Kumar K.V } 979ad77dbceSAneesh Kumar K.V /* Now set the ACL based on the default value */ 980ad77dbceSAneesh Kumar K.V v9fs_set_create_acl(dentry, dacl, pacl); 981ad77dbceSAneesh Kumar K.V 98201a622bdSM. Mohan Kumar error: 98301a622bdSM. Mohan Kumar if (fid) 98401a622bdSM. Mohan Kumar p9_client_clunk(fid); 98501a622bdSM. Mohan Kumar return err; 98601a622bdSM. Mohan Kumar } 98701a622bdSM. Mohan Kumar 9882bad8471SEric Van Hensbergen /** 9892bad8471SEric Van Hensbergen * v9fs_vfs_lookup - VFS lookup hook to "walk" to a new inode 9902bad8471SEric Van Hensbergen * @dir: inode that is being walked from 9912bad8471SEric Van Hensbergen * @dentry: dentry that is being walked to? 9922bad8471SEric Van Hensbergen * @nameidata: path data 9932bad8471SEric Van Hensbergen * 9942bad8471SEric Van Hensbergen */ 9952bad8471SEric Van Hensbergen 9962bad8471SEric Van Hensbergen static struct dentry *v9fs_vfs_lookup(struct inode *dir, struct dentry *dentry, 9972bad8471SEric Van Hensbergen struct nameidata *nameidata) 9982bad8471SEric Van Hensbergen { 9992bad8471SEric Van Hensbergen struct super_block *sb; 10002bad8471SEric Van Hensbergen struct v9fs_session_info *v9ses; 1001bd238fb4SLatchesar Ionkov struct p9_fid *dfid, *fid; 10022bad8471SEric Van Hensbergen struct inode *inode; 1003bd238fb4SLatchesar Ionkov char *name; 10042bad8471SEric Van Hensbergen int result = 0; 10052bad8471SEric Van Hensbergen 1006bd238fb4SLatchesar Ionkov P9_DPRINTK(P9_DEBUG_VFS, "dir: %p dentry: (%s) %p nameidata: %p\n", 1007731805b4SLatchesar Ionkov dir, dentry->d_name.name, dentry, nameidata); 10082bad8471SEric Van Hensbergen 100911e9b49bSSripathi Kodi if (dentry->d_name.len > NAME_MAX) 101011e9b49bSSripathi Kodi return ERR_PTR(-ENAMETOOLONG); 101111e9b49bSSripathi Kodi 10122bad8471SEric Van Hensbergen sb = dir->i_sb; 10132bad8471SEric Van Hensbergen v9ses = v9fs_inode2v9ses(dir); 1014a534c8d1SAneesh Kumar K.V /* We can walk d_parent because we hold the dir->i_mutex */ 1015bd238fb4SLatchesar Ionkov dfid = v9fs_fid_lookup(dentry->d_parent); 1016bd238fb4SLatchesar Ionkov if (IS_ERR(dfid)) 1017e231c2eeSDavid Howells return ERR_CAST(dfid); 10182bad8471SEric Van Hensbergen 1019bd238fb4SLatchesar Ionkov name = (char *) dentry->d_name.name; 1020bd238fb4SLatchesar Ionkov fid = p9_client_walk(dfid, 1, &name, 1); 1021bd238fb4SLatchesar Ionkov if (IS_ERR(fid)) { 1022bd238fb4SLatchesar Ionkov result = PTR_ERR(fid); 10232bad8471SEric Van Hensbergen if (result == -ENOENT) { 102485e0df24SAneesh Kumar K.V inode = NULL; 102585e0df24SAneesh Kumar K.V goto inst_out; 10262bad8471SEric Van Hensbergen } 10272bad8471SEric Van Hensbergen 1028bd238fb4SLatchesar Ionkov return ERR_PTR(result); 10292bad8471SEric Van Hensbergen } 10302bad8471SEric Van Hensbergen 1031bd238fb4SLatchesar Ionkov inode = v9fs_inode_from_fid(v9ses, fid, dir->i_sb); 1032bd238fb4SLatchesar Ionkov if (IS_ERR(inode)) { 1033bd238fb4SLatchesar Ionkov result = PTR_ERR(inode); 1034bd238fb4SLatchesar Ionkov inode = NULL; 1035bd238fb4SLatchesar Ionkov goto error; 10362bad8471SEric Van Hensbergen } 10372bad8471SEric Van Hensbergen 1038bd238fb4SLatchesar Ionkov result = v9fs_fid_add(dentry, fid); 10396a3124a3SLatchesar Ionkov if (result < 0) 10409856af8bSAneesh Kumar K.V goto error_iput; 10416a3124a3SLatchesar Ionkov 104285e0df24SAneesh Kumar K.V inst_out: 104385e0df24SAneesh Kumar K.V if (v9ses->cache) 1044e03abc0cSEric Van Hensbergen dentry->d_op = &v9fs_cached_dentry_operations; 1045e03abc0cSEric Van Hensbergen else 1046e03abc0cSEric Van Hensbergen dentry->d_op = &v9fs_dentry_operations; 10472bad8471SEric Van Hensbergen 10482bad8471SEric Van Hensbergen d_add(dentry, inode); 10492bad8471SEric Van Hensbergen return NULL; 10502bad8471SEric Van Hensbergen 10519856af8bSAneesh Kumar K.V error_iput: 10529856af8bSAneesh Kumar K.V iput(inode); 1053bd238fb4SLatchesar Ionkov error: 1054bd238fb4SLatchesar Ionkov p9_client_clunk(fid); 1055da977b2cSEric Van Hensbergen 10562bad8471SEric Van Hensbergen return ERR_PTR(result); 10572bad8471SEric Van Hensbergen } 10582bad8471SEric Van Hensbergen 10592bad8471SEric Van Hensbergen /** 10602bad8471SEric Van Hensbergen * v9fs_vfs_unlink - VFS unlink hook to delete an inode 10612bad8471SEric Van Hensbergen * @i: inode that is being unlinked 106273c592b9SEric Van Hensbergen * @d: dentry that is being unlinked 10632bad8471SEric Van Hensbergen * 10642bad8471SEric Van Hensbergen */ 10652bad8471SEric Van Hensbergen 10662bad8471SEric Van Hensbergen static int v9fs_vfs_unlink(struct inode *i, struct dentry *d) 10672bad8471SEric Van Hensbergen { 10682bad8471SEric Van Hensbergen return v9fs_remove(i, d, 0); 10692bad8471SEric Van Hensbergen } 10702bad8471SEric Van Hensbergen 10712bad8471SEric Van Hensbergen /** 10722bad8471SEric Van Hensbergen * v9fs_vfs_rmdir - VFS unlink hook to delete a directory 10732bad8471SEric Van Hensbergen * @i: inode that is being unlinked 107473c592b9SEric Van Hensbergen * @d: dentry that is being unlinked 10752bad8471SEric Van Hensbergen * 10762bad8471SEric Van Hensbergen */ 10772bad8471SEric Van Hensbergen 10782bad8471SEric Van Hensbergen static int v9fs_vfs_rmdir(struct inode *i, struct dentry *d) 10792bad8471SEric Van Hensbergen { 10802bad8471SEric Van Hensbergen return v9fs_remove(i, d, 1); 10812bad8471SEric Van Hensbergen } 10822bad8471SEric Van Hensbergen 10832bad8471SEric Van Hensbergen /** 10842bad8471SEric Van Hensbergen * v9fs_vfs_rename - VFS hook to rename an inode 10852bad8471SEric Van Hensbergen * @old_dir: old dir inode 10862bad8471SEric Van Hensbergen * @old_dentry: old dentry 10872bad8471SEric Van Hensbergen * @new_dir: new dir inode 10882bad8471SEric Van Hensbergen * @new_dentry: new dentry 10892bad8471SEric Van Hensbergen * 10902bad8471SEric Van Hensbergen */ 10912bad8471SEric Van Hensbergen 10922bad8471SEric Van Hensbergen static int 10932bad8471SEric Van Hensbergen v9fs_vfs_rename(struct inode *old_dir, struct dentry *old_dentry, 10942bad8471SEric Van Hensbergen struct inode *new_dir, struct dentry *new_dentry) 10952bad8471SEric Van Hensbergen { 1096bd238fb4SLatchesar Ionkov struct inode *old_inode; 1097bd238fb4SLatchesar Ionkov struct v9fs_session_info *v9ses; 1098bd238fb4SLatchesar Ionkov struct p9_fid *oldfid; 1099bd238fb4SLatchesar Ionkov struct p9_fid *olddirfid; 1100bd238fb4SLatchesar Ionkov struct p9_fid *newdirfid; 1101bd238fb4SLatchesar Ionkov struct p9_wstat wstat; 1102bd238fb4SLatchesar Ionkov int retval; 11032bad8471SEric Van Hensbergen 1104bd238fb4SLatchesar Ionkov P9_DPRINTK(P9_DEBUG_VFS, "\n"); 1105bd238fb4SLatchesar Ionkov retval = 0; 1106bd238fb4SLatchesar Ionkov old_inode = old_dentry->d_inode; 1107bd238fb4SLatchesar Ionkov v9ses = v9fs_inode2v9ses(old_inode); 1108bd238fb4SLatchesar Ionkov oldfid = v9fs_fid_lookup(old_dentry); 1109da977b2cSEric Van Hensbergen if (IS_ERR(oldfid)) 1110da977b2cSEric Van Hensbergen return PTR_ERR(oldfid); 1111da977b2cSEric Van Hensbergen 1112da977b2cSEric Van Hensbergen olddirfid = v9fs_fid_clone(old_dentry->d_parent); 1113da977b2cSEric Van Hensbergen if (IS_ERR(olddirfid)) { 1114da977b2cSEric Van Hensbergen retval = PTR_ERR(olddirfid); 1115bd238fb4SLatchesar Ionkov goto done; 1116da977b2cSEric Van Hensbergen } 1117da977b2cSEric Van Hensbergen 1118da977b2cSEric Van Hensbergen newdirfid = v9fs_fid_clone(new_dentry->d_parent); 1119da977b2cSEric Van Hensbergen if (IS_ERR(newdirfid)) { 1120da977b2cSEric Van Hensbergen retval = PTR_ERR(newdirfid); 1121bd238fb4SLatchesar Ionkov goto clunk_olddir; 11222bad8471SEric Van Hensbergen } 11232bad8471SEric Van Hensbergen 1124a534c8d1SAneesh Kumar K.V down_write(&v9ses->rename_sem); 11254681dbdaSSripathi Kodi if (v9fs_proto_dotl(v9ses)) { 11264681dbdaSSripathi Kodi retval = p9_client_rename(oldfid, newdirfid, 11274681dbdaSSripathi Kodi (char *) new_dentry->d_name.name); 11284681dbdaSSripathi Kodi if (retval != -ENOSYS) 11294681dbdaSSripathi Kodi goto clunk_newdir; 11304681dbdaSSripathi Kodi } 1131a534c8d1SAneesh Kumar K.V if (old_dentry->d_parent != new_dentry->d_parent) { 1132a534c8d1SAneesh Kumar K.V /* 1133a534c8d1SAneesh Kumar K.V * 9P .u can only handle file rename in the same directory 1134a534c8d1SAneesh Kumar K.V */ 11354681dbdaSSripathi Kodi 1136bd238fb4SLatchesar Ionkov P9_DPRINTK(P9_DEBUG_ERROR, 1137bd238fb4SLatchesar Ionkov "old dir and new dir are different\n"); 1138621997cdSEric Van Hensbergen retval = -EXDEV; 1139bd238fb4SLatchesar Ionkov goto clunk_newdir; 11402bad8471SEric Van Hensbergen } 1141531b1094SLatchesar Ionkov v9fs_blank_wstat(&wstat); 1142ba17674fSLatchesar Ionkov wstat.muid = v9ses->uname; 1143531b1094SLatchesar Ionkov wstat.name = (char *) new_dentry->d_name.name; 1144bd238fb4SLatchesar Ionkov retval = p9_client_wstat(oldfid, &wstat); 11452bad8471SEric Van Hensbergen 1146bd238fb4SLatchesar Ionkov clunk_newdir: 1147a534c8d1SAneesh Kumar K.V if (!retval) 1148a534c8d1SAneesh Kumar K.V /* successful rename */ 1149a534c8d1SAneesh Kumar K.V d_move(old_dentry, new_dentry); 1150a534c8d1SAneesh Kumar K.V up_write(&v9ses->rename_sem); 115122150c4fSLatchesar Ionkov p9_client_clunk(newdirfid); 11522bad8471SEric Van Hensbergen 1153bd238fb4SLatchesar Ionkov clunk_olddir: 115422150c4fSLatchesar Ionkov p9_client_clunk(olddirfid); 11552bad8471SEric Van Hensbergen 1156bd238fb4SLatchesar Ionkov done: 11572bad8471SEric Van Hensbergen return retval; 11582bad8471SEric Van Hensbergen } 11592bad8471SEric Van Hensbergen 11602bad8471SEric Van Hensbergen /** 1161943ffb58SAdrian Bunk * v9fs_vfs_getattr - retrieve file metadata 1162ee443996SEric Van Hensbergen * @mnt: mount information 1163ee443996SEric Van Hensbergen * @dentry: file to get attributes on 1164ee443996SEric Van Hensbergen * @stat: metadata structure to populate 11652bad8471SEric Van Hensbergen * 11662bad8471SEric Van Hensbergen */ 11672bad8471SEric Van Hensbergen 11682bad8471SEric Van Hensbergen static int 11692bad8471SEric Van Hensbergen v9fs_vfs_getattr(struct vfsmount *mnt, struct dentry *dentry, 11702bad8471SEric Van Hensbergen struct kstat *stat) 11712bad8471SEric Van Hensbergen { 1172bd238fb4SLatchesar Ionkov int err; 1173bd238fb4SLatchesar Ionkov struct v9fs_session_info *v9ses; 1174bd238fb4SLatchesar Ionkov struct p9_fid *fid; 117551a87c55SEric Van Hensbergen struct p9_wstat *st; 11762bad8471SEric Van Hensbergen 1177bd238fb4SLatchesar Ionkov P9_DPRINTK(P9_DEBUG_VFS, "dentry: %p\n", dentry); 1178bd238fb4SLatchesar Ionkov err = -EPERM; 1179bd238fb4SLatchesar Ionkov v9ses = v9fs_inode2v9ses(dentry->d_inode); 118060e78d2cSAbhishek Kulkarni if (v9ses->cache == CACHE_LOOSE || v9ses->cache == CACHE_FSCACHE) 11819523a841SEric Van Hensbergen return simple_getattr(mnt, dentry, stat); 11829523a841SEric Van Hensbergen 1183bd238fb4SLatchesar Ionkov fid = v9fs_fid_lookup(dentry); 1184da977b2cSEric Van Hensbergen if (IS_ERR(fid)) 1185da977b2cSEric Van Hensbergen return PTR_ERR(fid); 11862bad8471SEric Van Hensbergen 1187bd238fb4SLatchesar Ionkov st = p9_client_stat(fid); 1188bd238fb4SLatchesar Ionkov if (IS_ERR(st)) 1189bd238fb4SLatchesar Ionkov return PTR_ERR(st); 11902bad8471SEric Van Hensbergen 1191bd238fb4SLatchesar Ionkov v9fs_stat2inode(st, dentry->d_inode, dentry->d_inode->i_sb); 11922bad8471SEric Van Hensbergen generic_fillattr(dentry->d_inode, stat); 11932bad8471SEric Van Hensbergen 119462b2be59SLatchesar Ionkov p9stat_free(st); 1195bd238fb4SLatchesar Ionkov kfree(st); 1196bd238fb4SLatchesar Ionkov return 0; 11972bad8471SEric Van Hensbergen } 11982bad8471SEric Van Hensbergen 1199f0853122SSripathi Kodi static int 1200f0853122SSripathi Kodi v9fs_vfs_getattr_dotl(struct vfsmount *mnt, struct dentry *dentry, 1201f0853122SSripathi Kodi struct kstat *stat) 1202f0853122SSripathi Kodi { 1203f0853122SSripathi Kodi int err; 1204f0853122SSripathi Kodi struct v9fs_session_info *v9ses; 1205f0853122SSripathi Kodi struct p9_fid *fid; 1206f0853122SSripathi Kodi struct p9_stat_dotl *st; 1207f0853122SSripathi Kodi 1208f0853122SSripathi Kodi P9_DPRINTK(P9_DEBUG_VFS, "dentry: %p\n", dentry); 1209f0853122SSripathi Kodi err = -EPERM; 1210f0853122SSripathi Kodi v9ses = v9fs_inode2v9ses(dentry->d_inode); 1211f0853122SSripathi Kodi if (v9ses->cache == CACHE_LOOSE || v9ses->cache == CACHE_FSCACHE) 1212f0853122SSripathi Kodi return simple_getattr(mnt, dentry, stat); 1213f0853122SSripathi Kodi 1214f0853122SSripathi Kodi fid = v9fs_fid_lookup(dentry); 1215f0853122SSripathi Kodi if (IS_ERR(fid)) 1216f0853122SSripathi Kodi return PTR_ERR(fid); 1217f0853122SSripathi Kodi 1218f0853122SSripathi Kodi /* Ask for all the fields in stat structure. Server will return 1219f0853122SSripathi Kodi * whatever it supports 1220f0853122SSripathi Kodi */ 1221f0853122SSripathi Kodi 1222f0853122SSripathi Kodi st = p9_client_getattr_dotl(fid, P9_STATS_ALL); 1223f0853122SSripathi Kodi if (IS_ERR(st)) 1224f0853122SSripathi Kodi return PTR_ERR(st); 1225f0853122SSripathi Kodi 1226f0853122SSripathi Kodi v9fs_stat2inode_dotl(st, dentry->d_inode); 1227f0853122SSripathi Kodi generic_fillattr(dentry->d_inode, stat); 1228f0853122SSripathi Kodi /* Change block size to what the server returned */ 1229f0853122SSripathi Kodi stat->blksize = st->st_blksize; 1230f0853122SSripathi Kodi 1231f0853122SSripathi Kodi kfree(st); 1232f0853122SSripathi Kodi return 0; 1233f0853122SSripathi Kodi } 1234f0853122SSripathi Kodi 12352bad8471SEric Van Hensbergen /** 12362bad8471SEric Van Hensbergen * v9fs_vfs_setattr - set file metadata 12372bad8471SEric Van Hensbergen * @dentry: file whose metadata to set 12382bad8471SEric Van Hensbergen * @iattr: metadata assignment structure 12392bad8471SEric Van Hensbergen * 12402bad8471SEric Van Hensbergen */ 12412bad8471SEric Van Hensbergen 12422bad8471SEric Van Hensbergen static int v9fs_vfs_setattr(struct dentry *dentry, struct iattr *iattr) 12432bad8471SEric Van Hensbergen { 1244bd238fb4SLatchesar Ionkov int retval; 1245bd238fb4SLatchesar Ionkov struct v9fs_session_info *v9ses; 1246bd238fb4SLatchesar Ionkov struct p9_fid *fid; 1247bd238fb4SLatchesar Ionkov struct p9_wstat wstat; 12482bad8471SEric Van Hensbergen 1249bd238fb4SLatchesar Ionkov P9_DPRINTK(P9_DEBUG_VFS, "\n"); 1250bd238fb4SLatchesar Ionkov retval = -EPERM; 1251bd238fb4SLatchesar Ionkov v9ses = v9fs_inode2v9ses(dentry->d_inode); 1252bd238fb4SLatchesar Ionkov fid = v9fs_fid_lookup(dentry); 1253da977b2cSEric Van Hensbergen if(IS_ERR(fid)) 1254da977b2cSEric Van Hensbergen return PTR_ERR(fid); 12552bad8471SEric Van Hensbergen 1256531b1094SLatchesar Ionkov v9fs_blank_wstat(&wstat); 12572bad8471SEric Van Hensbergen if (iattr->ia_valid & ATTR_MODE) 1258531b1094SLatchesar Ionkov wstat.mode = unixmode2p9mode(v9ses, iattr->ia_mode); 12592bad8471SEric Van Hensbergen 12602bad8471SEric Van Hensbergen if (iattr->ia_valid & ATTR_MTIME) 1261531b1094SLatchesar Ionkov wstat.mtime = iattr->ia_mtime.tv_sec; 12622bad8471SEric Van Hensbergen 12632bad8471SEric Van Hensbergen if (iattr->ia_valid & ATTR_ATIME) 1264531b1094SLatchesar Ionkov wstat.atime = iattr->ia_atime.tv_sec; 12652bad8471SEric Van Hensbergen 12662bad8471SEric Van Hensbergen if (iattr->ia_valid & ATTR_SIZE) 1267531b1094SLatchesar Ionkov wstat.length = iattr->ia_size; 12682bad8471SEric Van Hensbergen 1269dd6102fbSSripathi Kodi if (v9fs_proto_dotu(v9ses)) { 1270531b1094SLatchesar Ionkov if (iattr->ia_valid & ATTR_UID) 1271531b1094SLatchesar Ionkov wstat.n_uid = iattr->ia_uid; 12722bad8471SEric Van Hensbergen 1273531b1094SLatchesar Ionkov if (iattr->ia_valid & ATTR_GID) 1274531b1094SLatchesar Ionkov wstat.n_gid = iattr->ia_gid; 12752bad8471SEric Van Hensbergen } 12762bad8471SEric Van Hensbergen 1277bd238fb4SLatchesar Ionkov retval = p9_client_wstat(fid, &wstat); 12781025774cSChristoph Hellwig if (retval < 0) 1279bd238fb4SLatchesar Ionkov return retval; 12801025774cSChristoph Hellwig 12811025774cSChristoph Hellwig if ((iattr->ia_valid & ATTR_SIZE) && 12821025774cSChristoph Hellwig iattr->ia_size != i_size_read(dentry->d_inode)) { 12831025774cSChristoph Hellwig retval = vmtruncate(dentry->d_inode, iattr->ia_size); 12841025774cSChristoph Hellwig if (retval) 12851025774cSChristoph Hellwig return retval; 12861025774cSChristoph Hellwig } 12871025774cSChristoph Hellwig 12881025774cSChristoph Hellwig setattr_copy(dentry->d_inode, iattr); 12891025774cSChristoph Hellwig mark_inode_dirty(dentry->d_inode); 12901025774cSChristoph Hellwig return 0; 12912bad8471SEric Van Hensbergen } 12922bad8471SEric Van Hensbergen 12932bad8471SEric Van Hensbergen /** 129487d7845aSSripathi Kodi * v9fs_vfs_setattr_dotl - set file metadata 129587d7845aSSripathi Kodi * @dentry: file whose metadata to set 129687d7845aSSripathi Kodi * @iattr: metadata assignment structure 129787d7845aSSripathi Kodi * 129887d7845aSSripathi Kodi */ 129987d7845aSSripathi Kodi 130022d8dcdfSAneesh Kumar K.V int v9fs_vfs_setattr_dotl(struct dentry *dentry, struct iattr *iattr) 130187d7845aSSripathi Kodi { 130287d7845aSSripathi Kodi int retval; 130387d7845aSSripathi Kodi struct v9fs_session_info *v9ses; 130487d7845aSSripathi Kodi struct p9_fid *fid; 130587d7845aSSripathi Kodi struct p9_iattr_dotl p9attr; 130687d7845aSSripathi Kodi 130787d7845aSSripathi Kodi P9_DPRINTK(P9_DEBUG_VFS, "\n"); 130887d7845aSSripathi Kodi 130987d7845aSSripathi Kodi retval = inode_change_ok(dentry->d_inode, iattr); 131087d7845aSSripathi Kodi if (retval) 131187d7845aSSripathi Kodi return retval; 131287d7845aSSripathi Kodi 131387d7845aSSripathi Kodi p9attr.valid = iattr->ia_valid; 131487d7845aSSripathi Kodi p9attr.mode = iattr->ia_mode; 131587d7845aSSripathi Kodi p9attr.uid = iattr->ia_uid; 131687d7845aSSripathi Kodi p9attr.gid = iattr->ia_gid; 131787d7845aSSripathi Kodi p9attr.size = iattr->ia_size; 131887d7845aSSripathi Kodi p9attr.atime_sec = iattr->ia_atime.tv_sec; 131987d7845aSSripathi Kodi p9attr.atime_nsec = iattr->ia_atime.tv_nsec; 132087d7845aSSripathi Kodi p9attr.mtime_sec = iattr->ia_mtime.tv_sec; 132187d7845aSSripathi Kodi p9attr.mtime_nsec = iattr->ia_mtime.tv_nsec; 132287d7845aSSripathi Kodi 132387d7845aSSripathi Kodi retval = -EPERM; 132487d7845aSSripathi Kodi v9ses = v9fs_inode2v9ses(dentry->d_inode); 132587d7845aSSripathi Kodi fid = v9fs_fid_lookup(dentry); 132687d7845aSSripathi Kodi if (IS_ERR(fid)) 132787d7845aSSripathi Kodi return PTR_ERR(fid); 132887d7845aSSripathi Kodi 132987d7845aSSripathi Kodi retval = p9_client_setattr(fid, &p9attr); 13308cef9c67SStephen Rothwell if (retval < 0) 133187d7845aSSripathi Kodi return retval; 13328cef9c67SStephen Rothwell 13338cef9c67SStephen Rothwell if ((iattr->ia_valid & ATTR_SIZE) && 13348cef9c67SStephen Rothwell iattr->ia_size != i_size_read(dentry->d_inode)) { 13358cef9c67SStephen Rothwell retval = vmtruncate(dentry->d_inode, iattr->ia_size); 13368cef9c67SStephen Rothwell if (retval) 13378cef9c67SStephen Rothwell return retval; 13388cef9c67SStephen Rothwell } 13398cef9c67SStephen Rothwell 13408cef9c67SStephen Rothwell setattr_copy(dentry->d_inode, iattr); 13418cef9c67SStephen Rothwell mark_inode_dirty(dentry->d_inode); 13426e8dc555SAneesh Kumar K.V if (iattr->ia_valid & ATTR_MODE) { 13436e8dc555SAneesh Kumar K.V /* We also want to update ACL when we update mode bits */ 13446e8dc555SAneesh Kumar K.V retval = v9fs_acl_chmod(dentry); 13456e8dc555SAneesh Kumar K.V if (retval < 0) 13466e8dc555SAneesh Kumar K.V return retval; 13476e8dc555SAneesh Kumar K.V } 13488cef9c67SStephen Rothwell return 0; 134987d7845aSSripathi Kodi } 135087d7845aSSripathi Kodi 135187d7845aSSripathi Kodi /** 1352531b1094SLatchesar Ionkov * v9fs_stat2inode - populate an inode structure with mistat info 1353531b1094SLatchesar Ionkov * @stat: Plan 9 metadata (mistat) structure 13542bad8471SEric Van Hensbergen * @inode: inode to populate 13552bad8471SEric Van Hensbergen * @sb: superblock of filesystem 13562bad8471SEric Van Hensbergen * 13572bad8471SEric Van Hensbergen */ 13582bad8471SEric Van Hensbergen 13592bad8471SEric Van Hensbergen void 136051a87c55SEric Van Hensbergen v9fs_stat2inode(struct p9_wstat *stat, struct inode *inode, 13612bad8471SEric Van Hensbergen struct super_block *sb) 13622bad8471SEric Van Hensbergen { 1363531b1094SLatchesar Ionkov char ext[32]; 13645717144aSAneesh Kumar K.V char tag_name[14]; 13655717144aSAneesh Kumar K.V unsigned int i_nlink; 13662bad8471SEric Van Hensbergen struct v9fs_session_info *v9ses = sb->s_fs_info; 13672bad8471SEric Van Hensbergen 13682bad8471SEric Van Hensbergen inode->i_nlink = 1; 13692bad8471SEric Van Hensbergen 1370531b1094SLatchesar Ionkov inode->i_atime.tv_sec = stat->atime; 1371531b1094SLatchesar Ionkov inode->i_mtime.tv_sec = stat->mtime; 1372531b1094SLatchesar Ionkov inode->i_ctime.tv_sec = stat->mtime; 13732bad8471SEric Van Hensbergen 1374bd32b82dSLatchesar Ionkov inode->i_uid = v9ses->dfltuid; 1375bd32b82dSLatchesar Ionkov inode->i_gid = v9ses->dfltgid; 13762bad8471SEric Van Hensbergen 1377dd6102fbSSripathi Kodi if (v9fs_proto_dotu(v9ses)) { 1378531b1094SLatchesar Ionkov inode->i_uid = stat->n_uid; 1379531b1094SLatchesar Ionkov inode->i_gid = stat->n_gid; 1380531b1094SLatchesar Ionkov } 13815717144aSAneesh Kumar K.V if ((S_ISREG(inode->i_mode)) || (S_ISDIR(inode->i_mode))) { 13825717144aSAneesh Kumar K.V if (v9fs_proto_dotu(v9ses) && (stat->extension[0] != '\0')) { 13835717144aSAneesh Kumar K.V /* 13845717144aSAneesh Kumar K.V * Hadlink support got added later to 13855717144aSAneesh Kumar K.V * to the .u extension. So there can be 13865717144aSAneesh Kumar K.V * server out there that doesn't support 13875717144aSAneesh Kumar K.V * this even with .u extension. So check 13885717144aSAneesh Kumar K.V * for non NULL stat->extension 13895717144aSAneesh Kumar K.V */ 13905717144aSAneesh Kumar K.V strncpy(ext, stat->extension, sizeof(ext)); 13915717144aSAneesh Kumar K.V /* HARDLINKCOUNT %u */ 13925717144aSAneesh Kumar K.V sscanf(ext, "%13s %u", tag_name, &i_nlink); 13935717144aSAneesh Kumar K.V if (!strncmp(tag_name, "HARDLINKCOUNT", 13)) 13945717144aSAneesh Kumar K.V inode->i_nlink = i_nlink; 13955717144aSAneesh Kumar K.V } 13965717144aSAneesh Kumar K.V } 1397531b1094SLatchesar Ionkov inode->i_mode = p9mode2unixmode(v9ses, stat->mode); 13982bad8471SEric Van Hensbergen if ((S_ISBLK(inode->i_mode)) || (S_ISCHR(inode->i_mode))) { 13992bad8471SEric Van Hensbergen char type = 0; 14002bad8471SEric Van Hensbergen int major = -1; 14012bad8471SEric Van Hensbergen int minor = -1; 1402531b1094SLatchesar Ionkov 140351a87c55SEric Van Hensbergen strncpy(ext, stat->extension, sizeof(ext)); 1404531b1094SLatchesar Ionkov sscanf(ext, "%c %u %u", &type, &major, &minor); 14052bad8471SEric Van Hensbergen switch (type) { 14062bad8471SEric Van Hensbergen case 'c': 14072bad8471SEric Van Hensbergen inode->i_mode &= ~S_IFBLK; 14082bad8471SEric Van Hensbergen inode->i_mode |= S_IFCHR; 14092bad8471SEric Van Hensbergen break; 14102bad8471SEric Van Hensbergen case 'b': 14112bad8471SEric Van Hensbergen break; 14122bad8471SEric Van Hensbergen default: 1413bd238fb4SLatchesar Ionkov P9_DPRINTK(P9_DEBUG_ERROR, 141451a87c55SEric Van Hensbergen "Unknown special type %c %s\n", type, 141551a87c55SEric Van Hensbergen stat->extension); 14162bad8471SEric Van Hensbergen }; 14172bad8471SEric Van Hensbergen inode->i_rdev = MKDEV(major, minor); 141857c7b4e6SMagnus Deininger init_special_inode(inode, inode->i_mode, inode->i_rdev); 14192bad8471SEric Van Hensbergen } else 14202bad8471SEric Van Hensbergen inode->i_rdev = 0; 14212bad8471SEric Van Hensbergen 14227549ae3eSAbhishek Kulkarni i_size_write(inode, stat->length); 14232bad8471SEric Van Hensbergen 1424bd238fb4SLatchesar Ionkov /* not real number of blocks, but 512 byte ones ... */ 14257549ae3eSAbhishek Kulkarni inode->i_blocks = (i_size_read(inode) + 512 - 1) >> 9; 14262bad8471SEric Van Hensbergen } 14272bad8471SEric Van Hensbergen 14282bad8471SEric Van Hensbergen /** 1429f0853122SSripathi Kodi * v9fs_stat2inode_dotl - populate an inode structure with stat info 1430f0853122SSripathi Kodi * @stat: stat structure 1431f0853122SSripathi Kodi * @inode: inode to populate 1432f0853122SSripathi Kodi * @sb: superblock of filesystem 1433f0853122SSripathi Kodi * 1434f0853122SSripathi Kodi */ 1435f0853122SSripathi Kodi 1436f0853122SSripathi Kodi void 1437f0853122SSripathi Kodi v9fs_stat2inode_dotl(struct p9_stat_dotl *stat, struct inode *inode) 1438f0853122SSripathi Kodi { 1439f0853122SSripathi Kodi 1440f0853122SSripathi Kodi if ((stat->st_result_mask & P9_STATS_BASIC) == P9_STATS_BASIC) { 1441f0853122SSripathi Kodi inode->i_atime.tv_sec = stat->st_atime_sec; 1442f0853122SSripathi Kodi inode->i_atime.tv_nsec = stat->st_atime_nsec; 1443f0853122SSripathi Kodi inode->i_mtime.tv_sec = stat->st_mtime_sec; 1444f0853122SSripathi Kodi inode->i_mtime.tv_nsec = stat->st_mtime_nsec; 1445f0853122SSripathi Kodi inode->i_ctime.tv_sec = stat->st_ctime_sec; 1446f0853122SSripathi Kodi inode->i_ctime.tv_nsec = stat->st_ctime_nsec; 1447f0853122SSripathi Kodi inode->i_uid = stat->st_uid; 1448f0853122SSripathi Kodi inode->i_gid = stat->st_gid; 1449f0853122SSripathi Kodi inode->i_nlink = stat->st_nlink; 1450f0853122SSripathi Kodi inode->i_mode = stat->st_mode; 1451f0853122SSripathi Kodi inode->i_rdev = new_decode_dev(stat->st_rdev); 1452f0853122SSripathi Kodi 1453f0853122SSripathi Kodi if ((S_ISBLK(inode->i_mode)) || (S_ISCHR(inode->i_mode))) 1454f0853122SSripathi Kodi init_special_inode(inode, inode->i_mode, inode->i_rdev); 1455f0853122SSripathi Kodi 1456f0853122SSripathi Kodi i_size_write(inode, stat->st_size); 1457f0853122SSripathi Kodi inode->i_blocks = stat->st_blocks; 1458f0853122SSripathi Kodi } else { 1459f0853122SSripathi Kodi if (stat->st_result_mask & P9_STATS_ATIME) { 1460f0853122SSripathi Kodi inode->i_atime.tv_sec = stat->st_atime_sec; 1461f0853122SSripathi Kodi inode->i_atime.tv_nsec = stat->st_atime_nsec; 1462f0853122SSripathi Kodi } 1463f0853122SSripathi Kodi if (stat->st_result_mask & P9_STATS_MTIME) { 1464f0853122SSripathi Kodi inode->i_mtime.tv_sec = stat->st_mtime_sec; 1465f0853122SSripathi Kodi inode->i_mtime.tv_nsec = stat->st_mtime_nsec; 1466f0853122SSripathi Kodi } 1467f0853122SSripathi Kodi if (stat->st_result_mask & P9_STATS_CTIME) { 1468f0853122SSripathi Kodi inode->i_ctime.tv_sec = stat->st_ctime_sec; 1469f0853122SSripathi Kodi inode->i_ctime.tv_nsec = stat->st_ctime_nsec; 1470f0853122SSripathi Kodi } 1471f0853122SSripathi Kodi if (stat->st_result_mask & P9_STATS_UID) 1472f0853122SSripathi Kodi inode->i_uid = stat->st_uid; 1473f0853122SSripathi Kodi if (stat->st_result_mask & P9_STATS_GID) 1474f0853122SSripathi Kodi inode->i_gid = stat->st_gid; 1475f0853122SSripathi Kodi if (stat->st_result_mask & P9_STATS_NLINK) 1476f0853122SSripathi Kodi inode->i_nlink = stat->st_nlink; 1477f0853122SSripathi Kodi if (stat->st_result_mask & P9_STATS_MODE) { 1478f0853122SSripathi Kodi inode->i_mode = stat->st_mode; 1479f0853122SSripathi Kodi if ((S_ISBLK(inode->i_mode)) || 1480f0853122SSripathi Kodi (S_ISCHR(inode->i_mode))) 1481f0853122SSripathi Kodi init_special_inode(inode, inode->i_mode, 1482f0853122SSripathi Kodi inode->i_rdev); 1483f0853122SSripathi Kodi } 1484f0853122SSripathi Kodi if (stat->st_result_mask & P9_STATS_RDEV) 1485f0853122SSripathi Kodi inode->i_rdev = new_decode_dev(stat->st_rdev); 1486f0853122SSripathi Kodi if (stat->st_result_mask & P9_STATS_SIZE) 1487f0853122SSripathi Kodi i_size_write(inode, stat->st_size); 1488f0853122SSripathi Kodi if (stat->st_result_mask & P9_STATS_BLOCKS) 1489f0853122SSripathi Kodi inode->i_blocks = stat->st_blocks; 1490f0853122SSripathi Kodi } 1491f0853122SSripathi Kodi if (stat->st_result_mask & P9_STATS_GEN) 1492f0853122SSripathi Kodi inode->i_generation = stat->st_gen; 1493f0853122SSripathi Kodi 1494f0853122SSripathi Kodi /* Currently we don't support P9_STATS_BTIME and P9_STATS_DATA_VERSION 1495f0853122SSripathi Kodi * because the inode structure does not have fields for them. 1496f0853122SSripathi Kodi */ 1497f0853122SSripathi Kodi } 1498f0853122SSripathi Kodi 1499f0853122SSripathi Kodi /** 15002bad8471SEric Van Hensbergen * v9fs_qid2ino - convert qid into inode number 15012bad8471SEric Van Hensbergen * @qid: qid to hash 15022bad8471SEric Van Hensbergen * 15032bad8471SEric Van Hensbergen * BUG: potential for inode number collisions? 15042bad8471SEric Van Hensbergen */ 15052bad8471SEric Van Hensbergen 1506bd238fb4SLatchesar Ionkov ino_t v9fs_qid2ino(struct p9_qid *qid) 15072bad8471SEric Van Hensbergen { 15082bad8471SEric Van Hensbergen u64 path = qid->path + 2; 15092bad8471SEric Van Hensbergen ino_t i = 0; 15102bad8471SEric Van Hensbergen 15112bad8471SEric Van Hensbergen if (sizeof(ino_t) == sizeof(path)) 15122bad8471SEric Van Hensbergen memcpy(&i, &path, sizeof(ino_t)); 15132bad8471SEric Van Hensbergen else 15142bad8471SEric Van Hensbergen i = (ino_t) (path ^ (path >> 32)); 15152bad8471SEric Van Hensbergen 15162bad8471SEric Van Hensbergen return i; 15172bad8471SEric Van Hensbergen } 15182bad8471SEric Van Hensbergen 15192bad8471SEric Van Hensbergen /** 15202bad8471SEric Van Hensbergen * v9fs_readlink - read a symlink's location (internal version) 15212bad8471SEric Van Hensbergen * @dentry: dentry for symlink 152273c592b9SEric Van Hensbergen * @buffer: buffer to load symlink location into 15232bad8471SEric Van Hensbergen * @buflen: length of buffer 15242bad8471SEric Van Hensbergen * 15252bad8471SEric Van Hensbergen */ 15262bad8471SEric Van Hensbergen 15272bad8471SEric Van Hensbergen static int v9fs_readlink(struct dentry *dentry, char *buffer, int buflen) 15282bad8471SEric Van Hensbergen { 1529bd238fb4SLatchesar Ionkov int retval; 15302bad8471SEric Van Hensbergen 1531bd238fb4SLatchesar Ionkov struct v9fs_session_info *v9ses; 1532bd238fb4SLatchesar Ionkov struct p9_fid *fid; 153351a87c55SEric Van Hensbergen struct p9_wstat *st; 15342bad8471SEric Van Hensbergen 1535bd238fb4SLatchesar Ionkov P9_DPRINTK(P9_DEBUG_VFS, " %s\n", dentry->d_name.name); 1536bd238fb4SLatchesar Ionkov retval = -EPERM; 1537bd238fb4SLatchesar Ionkov v9ses = v9fs_inode2v9ses(dentry->d_inode); 1538bd238fb4SLatchesar Ionkov fid = v9fs_fid_lookup(dentry); 1539da977b2cSEric Van Hensbergen if (IS_ERR(fid)) 1540da977b2cSEric Van Hensbergen return PTR_ERR(fid); 15412bad8471SEric Van Hensbergen 1542329176ccSM. Mohan Kumar if (!v9fs_proto_dotu(v9ses)) 1543bd238fb4SLatchesar Ionkov return -EBADF; 15442bad8471SEric Van Hensbergen 1545bd238fb4SLatchesar Ionkov st = p9_client_stat(fid); 1546bd238fb4SLatchesar Ionkov if (IS_ERR(st)) 1547bd238fb4SLatchesar Ionkov return PTR_ERR(st); 15482bad8471SEric Van Hensbergen 1549bd238fb4SLatchesar Ionkov if (!(st->mode & P9_DMSYMLINK)) { 15502bad8471SEric Van Hensbergen retval = -EINVAL; 1551bd238fb4SLatchesar Ionkov goto done; 15522bad8471SEric Van Hensbergen } 15532bad8471SEric Van Hensbergen 15542bad8471SEric Van Hensbergen /* copy extension buffer into buffer */ 155551a87c55SEric Van Hensbergen strncpy(buffer, st->extension, buflen); 15562bad8471SEric Van Hensbergen 1557bd238fb4SLatchesar Ionkov P9_DPRINTK(P9_DEBUG_VFS, 155851a87c55SEric Van Hensbergen "%s -> %s (%s)\n", dentry->d_name.name, st->extension, buffer); 1559bd238fb4SLatchesar Ionkov 15602511cd0bSMartin Stava retval = strnlen(buffer, buflen); 1561bd238fb4SLatchesar Ionkov done: 156262b2be59SLatchesar Ionkov p9stat_free(st); 1563bd238fb4SLatchesar Ionkov kfree(st); 15642bad8471SEric Van Hensbergen return retval; 15652bad8471SEric Van Hensbergen } 15662bad8471SEric Van Hensbergen 15672bad8471SEric Van Hensbergen /** 15682bad8471SEric Van Hensbergen * v9fs_vfs_follow_link - follow a symlink path 15692bad8471SEric Van Hensbergen * @dentry: dentry for symlink 15702bad8471SEric Van Hensbergen * @nd: nameidata 15712bad8471SEric Van Hensbergen * 15722bad8471SEric Van Hensbergen */ 15732bad8471SEric Van Hensbergen 15742bad8471SEric Van Hensbergen static void *v9fs_vfs_follow_link(struct dentry *dentry, struct nameidata *nd) 15752bad8471SEric Van Hensbergen { 15762bad8471SEric Van Hensbergen int len = 0; 15772bad8471SEric Van Hensbergen char *link = __getname(); 15782bad8471SEric Van Hensbergen 1579bd238fb4SLatchesar Ionkov P9_DPRINTK(P9_DEBUG_VFS, "%s n", dentry->d_name.name); 15802bad8471SEric Van Hensbergen 15812bad8471SEric Van Hensbergen if (!link) 15822bad8471SEric Van Hensbergen link = ERR_PTR(-ENOMEM); 15832bad8471SEric Van Hensbergen else { 158416cce6d2SLatchesar Ionkov len = v9fs_readlink(dentry, link, PATH_MAX); 15852bad8471SEric Van Hensbergen 15862bad8471SEric Van Hensbergen if (len < 0) { 1587ce44eeb6SDavi Arnaut __putname(link); 15882bad8471SEric Van Hensbergen link = ERR_PTR(len); 15892bad8471SEric Van Hensbergen } else 15902511cd0bSMartin Stava link[min(len, PATH_MAX-1)] = 0; 15912bad8471SEric Van Hensbergen } 15922bad8471SEric Van Hensbergen nd_set_link(nd, link); 15932bad8471SEric Van Hensbergen 15942bad8471SEric Van Hensbergen return NULL; 15952bad8471SEric Van Hensbergen } 15962bad8471SEric Van Hensbergen 15972bad8471SEric Van Hensbergen /** 15982bad8471SEric Van Hensbergen * v9fs_vfs_put_link - release a symlink path 15992bad8471SEric Van Hensbergen * @dentry: dentry for symlink 16002bad8471SEric Van Hensbergen * @nd: nameidata 1601ee443996SEric Van Hensbergen * @p: unused 16022bad8471SEric Van Hensbergen * 16032bad8471SEric Van Hensbergen */ 16042bad8471SEric Van Hensbergen 1605ee443996SEric Van Hensbergen static void 1606ee443996SEric Van Hensbergen v9fs_vfs_put_link(struct dentry *dentry, struct nameidata *nd, void *p) 16072bad8471SEric Van Hensbergen { 16082bad8471SEric Van Hensbergen char *s = nd_get_link(nd); 16092bad8471SEric Van Hensbergen 16106ff23207SDuane Griffin P9_DPRINTK(P9_DEBUG_VFS, " %s %s\n", dentry->d_name.name, 16116ff23207SDuane Griffin IS_ERR(s) ? "<error>" : s); 16122bad8471SEric Van Hensbergen if (!IS_ERR(s)) 1613ce44eeb6SDavi Arnaut __putname(s); 16142bad8471SEric Van Hensbergen } 16152bad8471SEric Van Hensbergen 1616ee443996SEric Van Hensbergen /** 1617ee443996SEric Van Hensbergen * v9fs_vfs_mkspecial - create a special file 1618ee443996SEric Van Hensbergen * @dir: inode to create special file in 1619ee443996SEric Van Hensbergen * @dentry: dentry to create 1620ee443996SEric Van Hensbergen * @mode: mode to create special file 1621ee443996SEric Van Hensbergen * @extension: 9p2000.u format extension string representing special file 1622ee443996SEric Van Hensbergen * 1623ee443996SEric Van Hensbergen */ 1624ee443996SEric Van Hensbergen 1625531b1094SLatchesar Ionkov static int v9fs_vfs_mkspecial(struct inode *dir, struct dentry *dentry, 1626531b1094SLatchesar Ionkov int mode, const char *extension) 1627531b1094SLatchesar Ionkov { 1628bd238fb4SLatchesar Ionkov u32 perm; 1629531b1094SLatchesar Ionkov struct v9fs_session_info *v9ses; 1630bd238fb4SLatchesar Ionkov struct p9_fid *fid; 1631531b1094SLatchesar Ionkov 16326a3124a3SLatchesar Ionkov v9ses = v9fs_inode2v9ses(dir); 1633dd6102fbSSripathi Kodi if (!v9fs_proto_dotu(v9ses)) { 1634bd238fb4SLatchesar Ionkov P9_DPRINTK(P9_DEBUG_ERROR, "not extended\n"); 16356a3124a3SLatchesar Ionkov return -EPERM; 1636531b1094SLatchesar Ionkov } 1637531b1094SLatchesar Ionkov 1638da977b2cSEric Van Hensbergen perm = unixmode2p9mode(v9ses, mode); 1639bd238fb4SLatchesar Ionkov fid = v9fs_create(v9ses, dir, dentry, (char *) extension, perm, 1640bd238fb4SLatchesar Ionkov P9_OREAD); 1641bd238fb4SLatchesar Ionkov if (IS_ERR(fid)) 1642bd238fb4SLatchesar Ionkov return PTR_ERR(fid); 1643da977b2cSEric Van Hensbergen 1644bd238fb4SLatchesar Ionkov p9_client_clunk(fid); 16456a3124a3SLatchesar Ionkov return 0; 1646531b1094SLatchesar Ionkov } 1647531b1094SLatchesar Ionkov 1648531b1094SLatchesar Ionkov /** 164950cc42ffSVenkateswararao Jujjuri (JV) * v9fs_vfs_symlink_dotl - helper function to create symlinks 165050cc42ffSVenkateswararao Jujjuri (JV) * @dir: directory inode containing symlink 165150cc42ffSVenkateswararao Jujjuri (JV) * @dentry: dentry for symlink 165250cc42ffSVenkateswararao Jujjuri (JV) * @symname: symlink data 165350cc42ffSVenkateswararao Jujjuri (JV) * 165450cc42ffSVenkateswararao Jujjuri (JV) * See Also: 9P2000.L RFC for more information 165550cc42ffSVenkateswararao Jujjuri (JV) * 165650cc42ffSVenkateswararao Jujjuri (JV) */ 165750cc42ffSVenkateswararao Jujjuri (JV) 165850cc42ffSVenkateswararao Jujjuri (JV) static int 165950cc42ffSVenkateswararao Jujjuri (JV) v9fs_vfs_symlink_dotl(struct inode *dir, struct dentry *dentry, 166050cc42ffSVenkateswararao Jujjuri (JV) const char *symname) 166150cc42ffSVenkateswararao Jujjuri (JV) { 166250cc42ffSVenkateswararao Jujjuri (JV) struct v9fs_session_info *v9ses; 166350cc42ffSVenkateswararao Jujjuri (JV) struct p9_fid *dfid; 166450cc42ffSVenkateswararao Jujjuri (JV) struct p9_fid *fid = NULL; 166550cc42ffSVenkateswararao Jujjuri (JV) struct inode *inode; 166650cc42ffSVenkateswararao Jujjuri (JV) struct p9_qid qid; 166750cc42ffSVenkateswararao Jujjuri (JV) char *name; 166850cc42ffSVenkateswararao Jujjuri (JV) int err; 166950cc42ffSVenkateswararao Jujjuri (JV) gid_t gid; 167050cc42ffSVenkateswararao Jujjuri (JV) 167150cc42ffSVenkateswararao Jujjuri (JV) name = (char *) dentry->d_name.name; 167250cc42ffSVenkateswararao Jujjuri (JV) P9_DPRINTK(P9_DEBUG_VFS, "v9fs_vfs_symlink_dotl : %lu,%s,%s\n", 167350cc42ffSVenkateswararao Jujjuri (JV) dir->i_ino, name, symname); 167450cc42ffSVenkateswararao Jujjuri (JV) v9ses = v9fs_inode2v9ses(dir); 167550cc42ffSVenkateswararao Jujjuri (JV) 167650cc42ffSVenkateswararao Jujjuri (JV) dfid = v9fs_fid_lookup(dentry->d_parent); 167750cc42ffSVenkateswararao Jujjuri (JV) if (IS_ERR(dfid)) { 167850cc42ffSVenkateswararao Jujjuri (JV) err = PTR_ERR(dfid); 167950cc42ffSVenkateswararao Jujjuri (JV) P9_DPRINTK(P9_DEBUG_VFS, "fid lookup failed %d\n", err); 168050cc42ffSVenkateswararao Jujjuri (JV) return err; 168150cc42ffSVenkateswararao Jujjuri (JV) } 168250cc42ffSVenkateswararao Jujjuri (JV) 168350cc42ffSVenkateswararao Jujjuri (JV) gid = v9fs_get_fsgid_for_create(dir); 168450cc42ffSVenkateswararao Jujjuri (JV) 168550cc42ffSVenkateswararao Jujjuri (JV) /* Server doesn't alter fid on TSYMLINK. Hence no need to clone it. */ 168650cc42ffSVenkateswararao Jujjuri (JV) err = p9_client_symlink(dfid, name, (char *)symname, gid, &qid); 168750cc42ffSVenkateswararao Jujjuri (JV) 168850cc42ffSVenkateswararao Jujjuri (JV) if (err < 0) { 168950cc42ffSVenkateswararao Jujjuri (JV) P9_DPRINTK(P9_DEBUG_VFS, "p9_client_symlink failed %d\n", err); 169050cc42ffSVenkateswararao Jujjuri (JV) goto error; 169150cc42ffSVenkateswararao Jujjuri (JV) } 169250cc42ffSVenkateswararao Jujjuri (JV) 169350cc42ffSVenkateswararao Jujjuri (JV) if (v9ses->cache) { 169450cc42ffSVenkateswararao Jujjuri (JV) /* Now walk from the parent so we can get an unopened fid. */ 169550cc42ffSVenkateswararao Jujjuri (JV) fid = p9_client_walk(dfid, 1, &name, 1); 169650cc42ffSVenkateswararao Jujjuri (JV) if (IS_ERR(fid)) { 169750cc42ffSVenkateswararao Jujjuri (JV) err = PTR_ERR(fid); 169850cc42ffSVenkateswararao Jujjuri (JV) P9_DPRINTK(P9_DEBUG_VFS, "p9_client_walk failed %d\n", 169950cc42ffSVenkateswararao Jujjuri (JV) err); 170050cc42ffSVenkateswararao Jujjuri (JV) fid = NULL; 170150cc42ffSVenkateswararao Jujjuri (JV) goto error; 170250cc42ffSVenkateswararao Jujjuri (JV) } 170350cc42ffSVenkateswararao Jujjuri (JV) 170450cc42ffSVenkateswararao Jujjuri (JV) /* instantiate inode and assign the unopened fid to dentry */ 170550cc42ffSVenkateswararao Jujjuri (JV) inode = v9fs_inode_from_fid(v9ses, fid, dir->i_sb); 170650cc42ffSVenkateswararao Jujjuri (JV) if (IS_ERR(inode)) { 170750cc42ffSVenkateswararao Jujjuri (JV) err = PTR_ERR(inode); 170850cc42ffSVenkateswararao Jujjuri (JV) P9_DPRINTK(P9_DEBUG_VFS, "inode creation failed %d\n", 170950cc42ffSVenkateswararao Jujjuri (JV) err); 171050cc42ffSVenkateswararao Jujjuri (JV) goto error; 171150cc42ffSVenkateswararao Jujjuri (JV) } 171250cc42ffSVenkateswararao Jujjuri (JV) dentry->d_op = &v9fs_cached_dentry_operations; 171350cc42ffSVenkateswararao Jujjuri (JV) d_instantiate(dentry, inode); 171450cc42ffSVenkateswararao Jujjuri (JV) err = v9fs_fid_add(dentry, fid); 171550cc42ffSVenkateswararao Jujjuri (JV) if (err < 0) 171650cc42ffSVenkateswararao Jujjuri (JV) goto error; 171750cc42ffSVenkateswararao Jujjuri (JV) fid = NULL; 171850cc42ffSVenkateswararao Jujjuri (JV) } else { 171950cc42ffSVenkateswararao Jujjuri (JV) /* Not in cached mode. No need to populate inode with stat */ 172050cc42ffSVenkateswararao Jujjuri (JV) inode = v9fs_get_inode(dir->i_sb, S_IFLNK); 172150cc42ffSVenkateswararao Jujjuri (JV) if (IS_ERR(inode)) { 172250cc42ffSVenkateswararao Jujjuri (JV) err = PTR_ERR(inode); 172350cc42ffSVenkateswararao Jujjuri (JV) goto error; 172450cc42ffSVenkateswararao Jujjuri (JV) } 172550cc42ffSVenkateswararao Jujjuri (JV) dentry->d_op = &v9fs_dentry_operations; 172650cc42ffSVenkateswararao Jujjuri (JV) d_instantiate(dentry, inode); 172750cc42ffSVenkateswararao Jujjuri (JV) } 172850cc42ffSVenkateswararao Jujjuri (JV) 172950cc42ffSVenkateswararao Jujjuri (JV) error: 173050cc42ffSVenkateswararao Jujjuri (JV) if (fid) 173150cc42ffSVenkateswararao Jujjuri (JV) p9_client_clunk(fid); 173250cc42ffSVenkateswararao Jujjuri (JV) 173350cc42ffSVenkateswararao Jujjuri (JV) return err; 173450cc42ffSVenkateswararao Jujjuri (JV) } 173550cc42ffSVenkateswararao Jujjuri (JV) 173650cc42ffSVenkateswararao Jujjuri (JV) /** 1737531b1094SLatchesar Ionkov * v9fs_vfs_symlink - helper function to create symlinks 1738531b1094SLatchesar Ionkov * @dir: directory inode containing symlink 1739531b1094SLatchesar Ionkov * @dentry: dentry for symlink 1740531b1094SLatchesar Ionkov * @symname: symlink data 1741531b1094SLatchesar Ionkov * 1742ee443996SEric Van Hensbergen * See Also: 9P2000.u RFC for more information 1743531b1094SLatchesar Ionkov * 1744531b1094SLatchesar Ionkov */ 1745531b1094SLatchesar Ionkov 1746531b1094SLatchesar Ionkov static int 1747531b1094SLatchesar Ionkov v9fs_vfs_symlink(struct inode *dir, struct dentry *dentry, const char *symname) 1748531b1094SLatchesar Ionkov { 1749bd238fb4SLatchesar Ionkov P9_DPRINTK(P9_DEBUG_VFS, " %lu,%s,%s\n", dir->i_ino, 1750bd238fb4SLatchesar Ionkov dentry->d_name.name, symname); 1751531b1094SLatchesar Ionkov 1752531b1094SLatchesar Ionkov return v9fs_vfs_mkspecial(dir, dentry, S_IFLNK, symname); 1753531b1094SLatchesar Ionkov } 1754531b1094SLatchesar Ionkov 17552bad8471SEric Van Hensbergen /** 17562bad8471SEric Van Hensbergen * v9fs_vfs_link - create a hardlink 17572bad8471SEric Van Hensbergen * @old_dentry: dentry for file to link to 17582bad8471SEric Van Hensbergen * @dir: inode destination for new link 175973c592b9SEric Van Hensbergen * @dentry: dentry for link 17602bad8471SEric Van Hensbergen * 17612bad8471SEric Van Hensbergen */ 17622bad8471SEric Van Hensbergen 17632bad8471SEric Van Hensbergen static int 17642bad8471SEric Van Hensbergen v9fs_vfs_link(struct dentry *old_dentry, struct inode *dir, 17652bad8471SEric Van Hensbergen struct dentry *dentry) 17662bad8471SEric Van Hensbergen { 1767531b1094SLatchesar Ionkov int retval; 1768bd238fb4SLatchesar Ionkov struct p9_fid *oldfid; 1769531b1094SLatchesar Ionkov char *name; 17702bad8471SEric Van Hensbergen 1771bd238fb4SLatchesar Ionkov P9_DPRINTK(P9_DEBUG_VFS, 1772bd238fb4SLatchesar Ionkov " %lu,%s,%s\n", dir->i_ino, dentry->d_name.name, 17732bad8471SEric Van Hensbergen old_dentry->d_name.name); 17742bad8471SEric Van Hensbergen 1775da977b2cSEric Van Hensbergen oldfid = v9fs_fid_clone(old_dentry); 1776da977b2cSEric Van Hensbergen if (IS_ERR(oldfid)) 1777da977b2cSEric Van Hensbergen return PTR_ERR(oldfid); 17782bad8471SEric Van Hensbergen 1779531b1094SLatchesar Ionkov name = __getname(); 1780da977b2cSEric Van Hensbergen if (unlikely(!name)) { 1781da977b2cSEric Van Hensbergen retval = -ENOMEM; 1782da977b2cSEric Van Hensbergen goto clunk_fid; 1783da977b2cSEric Van Hensbergen } 17840710d36aSFlorin Malita 178516cce6d2SLatchesar Ionkov sprintf(name, "%d\n", oldfid->fid); 1786bd238fb4SLatchesar Ionkov retval = v9fs_vfs_mkspecial(dir, dentry, P9_DMLINK, name); 1787531b1094SLatchesar Ionkov __putname(name); 17882bad8471SEric Van Hensbergen 1789da977b2cSEric Van Hensbergen clunk_fid: 1790bd238fb4SLatchesar Ionkov p9_client_clunk(oldfid); 17912bad8471SEric Van Hensbergen return retval; 17922bad8471SEric Van Hensbergen } 17932bad8471SEric Van Hensbergen 17942bad8471SEric Van Hensbergen /** 179509d34ee5SEric Van Hensbergen * v9fs_vfs_link_dotl - create a hardlink for dotl 179609d34ee5SEric Van Hensbergen * @old_dentry: dentry for file to link to 179709d34ee5SEric Van Hensbergen * @dir: inode destination for new link 179809d34ee5SEric Van Hensbergen * @dentry: dentry for link 179909d34ee5SEric Van Hensbergen * 180009d34ee5SEric Van Hensbergen */ 180109d34ee5SEric Van Hensbergen 180209d34ee5SEric Van Hensbergen static int 180309d34ee5SEric Van Hensbergen v9fs_vfs_link_dotl(struct dentry *old_dentry, struct inode *dir, 180409d34ee5SEric Van Hensbergen struct dentry *dentry) 180509d34ee5SEric Van Hensbergen { 180609d34ee5SEric Van Hensbergen int err; 180709d34ee5SEric Van Hensbergen struct p9_fid *dfid, *oldfid; 180809d34ee5SEric Van Hensbergen char *name; 180909d34ee5SEric Van Hensbergen struct v9fs_session_info *v9ses; 181009d34ee5SEric Van Hensbergen struct dentry *dir_dentry; 181109d34ee5SEric Van Hensbergen 181209d34ee5SEric Van Hensbergen P9_DPRINTK(P9_DEBUG_VFS, "dir ino: %lu, old_name: %s, new_name: %s\n", 181309d34ee5SEric Van Hensbergen dir->i_ino, old_dentry->d_name.name, 181409d34ee5SEric Van Hensbergen dentry->d_name.name); 181509d34ee5SEric Van Hensbergen 181609d34ee5SEric Van Hensbergen v9ses = v9fs_inode2v9ses(dir); 181709d34ee5SEric Van Hensbergen dir_dentry = v9fs_dentry_from_dir_inode(dir); 181809d34ee5SEric Van Hensbergen dfid = v9fs_fid_lookup(dir_dentry); 181909d34ee5SEric Van Hensbergen if (IS_ERR(dfid)) 182009d34ee5SEric Van Hensbergen return PTR_ERR(dfid); 182109d34ee5SEric Van Hensbergen 182209d34ee5SEric Van Hensbergen oldfid = v9fs_fid_lookup(old_dentry); 182309d34ee5SEric Van Hensbergen if (IS_ERR(oldfid)) 182409d34ee5SEric Van Hensbergen return PTR_ERR(oldfid); 182509d34ee5SEric Van Hensbergen 182609d34ee5SEric Van Hensbergen name = (char *) dentry->d_name.name; 182709d34ee5SEric Van Hensbergen 182809d34ee5SEric Van Hensbergen err = p9_client_link(dfid, oldfid, (char *)dentry->d_name.name); 182909d34ee5SEric Van Hensbergen 183009d34ee5SEric Van Hensbergen if (err < 0) { 183109d34ee5SEric Van Hensbergen P9_DPRINTK(P9_DEBUG_VFS, "p9_client_link failed %d\n", err); 183209d34ee5SEric Van Hensbergen return err; 183309d34ee5SEric Van Hensbergen } 183409d34ee5SEric Van Hensbergen 183509d34ee5SEric Van Hensbergen if (v9ses->cache == CACHE_LOOSE || v9ses->cache == CACHE_FSCACHE) { 183609d34ee5SEric Van Hensbergen /* Get the latest stat info from server. */ 183709d34ee5SEric Van Hensbergen struct p9_fid *fid; 183809d34ee5SEric Van Hensbergen struct p9_stat_dotl *st; 183909d34ee5SEric Van Hensbergen 184009d34ee5SEric Van Hensbergen fid = v9fs_fid_lookup(old_dentry); 184109d34ee5SEric Van Hensbergen if (IS_ERR(fid)) 184209d34ee5SEric Van Hensbergen return PTR_ERR(fid); 184309d34ee5SEric Van Hensbergen 184409d34ee5SEric Van Hensbergen st = p9_client_getattr_dotl(fid, P9_STATS_BASIC); 184509d34ee5SEric Van Hensbergen if (IS_ERR(st)) 184609d34ee5SEric Van Hensbergen return PTR_ERR(st); 184709d34ee5SEric Van Hensbergen 184809d34ee5SEric Van Hensbergen v9fs_stat2inode_dotl(st, old_dentry->d_inode); 184909d34ee5SEric Van Hensbergen 185009d34ee5SEric Van Hensbergen kfree(st); 185109d34ee5SEric Van Hensbergen } else { 185209d34ee5SEric Van Hensbergen /* Caching disabled. No need to get upto date stat info. 18537de9c6eeSAl Viro * This dentry will be released immediately. So, just hold the 18547de9c6eeSAl Viro * inode 185509d34ee5SEric Van Hensbergen */ 18567de9c6eeSAl Viro ihold(old_dentry->d_inode); 185709d34ee5SEric Van Hensbergen } 185809d34ee5SEric Van Hensbergen 185909d34ee5SEric Van Hensbergen dentry->d_op = old_dentry->d_op; 186009d34ee5SEric Van Hensbergen d_instantiate(dentry, old_dentry->d_inode); 186109d34ee5SEric Van Hensbergen 186209d34ee5SEric Van Hensbergen return err; 186309d34ee5SEric Van Hensbergen } 186409d34ee5SEric Van Hensbergen 186509d34ee5SEric Van Hensbergen /** 18662bad8471SEric Van Hensbergen * v9fs_vfs_mknod - create a special file 18672bad8471SEric Van Hensbergen * @dir: inode destination for new link 18682bad8471SEric Van Hensbergen * @dentry: dentry for file 18692bad8471SEric Van Hensbergen * @mode: mode for creation 1870ee443996SEric Van Hensbergen * @rdev: device associated with special file 18712bad8471SEric Van Hensbergen * 18722bad8471SEric Van Hensbergen */ 18732bad8471SEric Van Hensbergen 18742bad8471SEric Van Hensbergen static int 18752bad8471SEric Van Hensbergen v9fs_vfs_mknod(struct inode *dir, struct dentry *dentry, int mode, dev_t rdev) 18762bad8471SEric Van Hensbergen { 1877531b1094SLatchesar Ionkov int retval; 1878531b1094SLatchesar Ionkov char *name; 18792bad8471SEric Van Hensbergen 1880bd238fb4SLatchesar Ionkov P9_DPRINTK(P9_DEBUG_VFS, 1881bd238fb4SLatchesar Ionkov " %lu,%s mode: %x MAJOR: %u MINOR: %u\n", dir->i_ino, 18822bad8471SEric Van Hensbergen dentry->d_name.name, mode, MAJOR(rdev), MINOR(rdev)); 18832bad8471SEric Van Hensbergen 1884531b1094SLatchesar Ionkov if (!new_valid_dev(rdev)) 1885531b1094SLatchesar Ionkov return -EINVAL; 188673c592b9SEric Van Hensbergen 1887531b1094SLatchesar Ionkov name = __getname(); 1888c0291a05SEugene Teo if (!name) 1889c0291a05SEugene Teo return -ENOMEM; 18902bad8471SEric Van Hensbergen /* build extension */ 18912bad8471SEric Van Hensbergen if (S_ISBLK(mode)) 1892531b1094SLatchesar Ionkov sprintf(name, "b %u %u", MAJOR(rdev), MINOR(rdev)); 18932bad8471SEric Van Hensbergen else if (S_ISCHR(mode)) 1894531b1094SLatchesar Ionkov sprintf(name, "c %u %u", MAJOR(rdev), MINOR(rdev)); 189573c592b9SEric Van Hensbergen else if (S_ISFIFO(mode)) 1896531b1094SLatchesar Ionkov *name = 0; 189775cc5c9bSVenkateswararao Jujjuri else if (S_ISSOCK(mode)) 189875cc5c9bSVenkateswararao Jujjuri *name = 0; 18992bad8471SEric Van Hensbergen else { 1900531b1094SLatchesar Ionkov __putname(name); 1901531b1094SLatchesar Ionkov return -EINVAL; 19022bad8471SEric Van Hensbergen } 19032bad8471SEric Van Hensbergen 1904531b1094SLatchesar Ionkov retval = v9fs_vfs_mkspecial(dir, dentry, mode, name); 1905531b1094SLatchesar Ionkov __putname(name); 19062bad8471SEric Van Hensbergen 19072bad8471SEric Van Hensbergen return retval; 19082bad8471SEric Van Hensbergen } 19092bad8471SEric Van Hensbergen 19104b43516aSM. Mohan Kumar /** 19114b43516aSM. Mohan Kumar * v9fs_vfs_mknod_dotl - create a special file 19124b43516aSM. Mohan Kumar * @dir: inode destination for new link 19134b43516aSM. Mohan Kumar * @dentry: dentry for file 19144b43516aSM. Mohan Kumar * @mode: mode for creation 19154b43516aSM. Mohan Kumar * @rdev: device associated with special file 19164b43516aSM. Mohan Kumar * 19174b43516aSM. Mohan Kumar */ 19184b43516aSM. Mohan Kumar static int 1919ad77dbceSAneesh Kumar K.V v9fs_vfs_mknod_dotl(struct inode *dir, struct dentry *dentry, int omode, 19204b43516aSM. Mohan Kumar dev_t rdev) 19214b43516aSM. Mohan Kumar { 19224b43516aSM. Mohan Kumar int err; 19234b43516aSM. Mohan Kumar char *name; 1924ad77dbceSAneesh Kumar K.V mode_t mode; 19254b43516aSM. Mohan Kumar struct v9fs_session_info *v9ses; 19264b43516aSM. Mohan Kumar struct p9_fid *fid = NULL, *dfid = NULL; 19274b43516aSM. Mohan Kumar struct inode *inode; 19284b43516aSM. Mohan Kumar gid_t gid; 19294b43516aSM. Mohan Kumar struct p9_qid qid; 193001a622bdSM. Mohan Kumar struct dentry *dir_dentry; 1931ad77dbceSAneesh Kumar K.V struct posix_acl *dacl = NULL, *pacl = NULL; 19324b43516aSM. Mohan Kumar 19334b43516aSM. Mohan Kumar P9_DPRINTK(P9_DEBUG_VFS, 19344b43516aSM. Mohan Kumar " %lu,%s mode: %x MAJOR: %u MINOR: %u\n", dir->i_ino, 1935ad77dbceSAneesh Kumar K.V dentry->d_name.name, omode, MAJOR(rdev), MINOR(rdev)); 19364b43516aSM. Mohan Kumar 19374b43516aSM. Mohan Kumar if (!new_valid_dev(rdev)) 19384b43516aSM. Mohan Kumar return -EINVAL; 19394b43516aSM. Mohan Kumar 19404b43516aSM. Mohan Kumar v9ses = v9fs_inode2v9ses(dir); 19414b43516aSM. Mohan Kumar dir_dentry = v9fs_dentry_from_dir_inode(dir); 194201a622bdSM. Mohan Kumar dfid = v9fs_fid_lookup(dir_dentry); 19434b43516aSM. Mohan Kumar if (IS_ERR(dfid)) { 19444b43516aSM. Mohan Kumar err = PTR_ERR(dfid); 19454b43516aSM. Mohan Kumar P9_DPRINTK(P9_DEBUG_VFS, "fid lookup failed %d\n", err); 19464b43516aSM. Mohan Kumar dfid = NULL; 19474b43516aSM. Mohan Kumar goto error; 19484b43516aSM. Mohan Kumar } 19494b43516aSM. Mohan Kumar 19504b43516aSM. Mohan Kumar gid = v9fs_get_fsgid_for_create(dir); 1951ad77dbceSAneesh Kumar K.V mode = omode; 1952ad77dbceSAneesh Kumar K.V /* Update mode based on ACL value */ 1953ad77dbceSAneesh Kumar K.V err = v9fs_acl_mode(dir, &mode, &dacl, &pacl); 1954ad77dbceSAneesh Kumar K.V if (err) { 1955ad77dbceSAneesh Kumar K.V P9_DPRINTK(P9_DEBUG_VFS, 1956ad77dbceSAneesh Kumar K.V "Failed to get acl values in mknod %d\n", err); 1957ad77dbceSAneesh Kumar K.V goto error; 1958ad77dbceSAneesh Kumar K.V } 19594b43516aSM. Mohan Kumar name = (char *) dentry->d_name.name; 19604b43516aSM. Mohan Kumar 19614b43516aSM. Mohan Kumar err = p9_client_mknod_dotl(dfid, name, mode, rdev, gid, &qid); 19624b43516aSM. Mohan Kumar if (err < 0) 19634b43516aSM. Mohan Kumar goto error; 19644b43516aSM. Mohan Kumar 19654b43516aSM. Mohan Kumar /* instantiate inode and assign the unopened fid to the dentry */ 19664b43516aSM. Mohan Kumar if (v9ses->cache == CACHE_LOOSE || v9ses->cache == CACHE_FSCACHE) { 19674b43516aSM. Mohan Kumar fid = p9_client_walk(dfid, 1, &name, 1); 19684b43516aSM. Mohan Kumar if (IS_ERR(fid)) { 19694b43516aSM. Mohan Kumar err = PTR_ERR(fid); 19704b43516aSM. Mohan Kumar P9_DPRINTK(P9_DEBUG_VFS, "p9_client_walk failed %d\n", 19714b43516aSM. Mohan Kumar err); 19724b43516aSM. Mohan Kumar fid = NULL; 19734b43516aSM. Mohan Kumar goto error; 19744b43516aSM. Mohan Kumar } 19754b43516aSM. Mohan Kumar 19764b43516aSM. Mohan Kumar inode = v9fs_inode_from_fid(v9ses, fid, dir->i_sb); 19774b43516aSM. Mohan Kumar if (IS_ERR(inode)) { 19784b43516aSM. Mohan Kumar err = PTR_ERR(inode); 19794b43516aSM. Mohan Kumar P9_DPRINTK(P9_DEBUG_VFS, "inode creation failed %d\n", 19804b43516aSM. Mohan Kumar err); 19814b43516aSM. Mohan Kumar goto error; 19824b43516aSM. Mohan Kumar } 19834b43516aSM. Mohan Kumar dentry->d_op = &v9fs_cached_dentry_operations; 19844b43516aSM. Mohan Kumar d_instantiate(dentry, inode); 19854b43516aSM. Mohan Kumar err = v9fs_fid_add(dentry, fid); 19864b43516aSM. Mohan Kumar if (err < 0) 19874b43516aSM. Mohan Kumar goto error; 19884b43516aSM. Mohan Kumar fid = NULL; 19894b43516aSM. Mohan Kumar } else { 19904b43516aSM. Mohan Kumar /* 19914b43516aSM. Mohan Kumar * Not in cached mode. No need to populate inode with stat. 19924b43516aSM. Mohan Kumar * socket syscall returns a fd, so we need instantiate 19934b43516aSM. Mohan Kumar */ 19944b43516aSM. Mohan Kumar inode = v9fs_get_inode(dir->i_sb, mode); 19954b43516aSM. Mohan Kumar if (IS_ERR(inode)) { 19964b43516aSM. Mohan Kumar err = PTR_ERR(inode); 19974b43516aSM. Mohan Kumar goto error; 19984b43516aSM. Mohan Kumar } 19994b43516aSM. Mohan Kumar dentry->d_op = &v9fs_dentry_operations; 20004b43516aSM. Mohan Kumar d_instantiate(dentry, inode); 20014b43516aSM. Mohan Kumar } 2002ad77dbceSAneesh Kumar K.V /* Now set the ACL based on the default value */ 2003ad77dbceSAneesh Kumar K.V v9fs_set_create_acl(dentry, dacl, pacl); 20044b43516aSM. Mohan Kumar error: 20054b43516aSM. Mohan Kumar if (fid) 20064b43516aSM. Mohan Kumar p9_client_clunk(fid); 20074b43516aSM. Mohan Kumar return err; 20084b43516aSM. Mohan Kumar } 20094b43516aSM. Mohan Kumar 2010329176ccSM. Mohan Kumar static int 2011329176ccSM. Mohan Kumar v9fs_vfs_readlink_dotl(struct dentry *dentry, char *buffer, int buflen) 2012329176ccSM. Mohan Kumar { 2013329176ccSM. Mohan Kumar int retval; 2014329176ccSM. Mohan Kumar struct p9_fid *fid; 2015329176ccSM. Mohan Kumar char *target = NULL; 2016329176ccSM. Mohan Kumar 2017329176ccSM. Mohan Kumar P9_DPRINTK(P9_DEBUG_VFS, " %s\n", dentry->d_name.name); 2018329176ccSM. Mohan Kumar retval = -EPERM; 2019329176ccSM. Mohan Kumar fid = v9fs_fid_lookup(dentry); 2020329176ccSM. Mohan Kumar if (IS_ERR(fid)) 2021329176ccSM. Mohan Kumar return PTR_ERR(fid); 2022329176ccSM. Mohan Kumar 2023329176ccSM. Mohan Kumar retval = p9_client_readlink(fid, &target); 2024329176ccSM. Mohan Kumar if (retval < 0) 2025329176ccSM. Mohan Kumar return retval; 2026329176ccSM. Mohan Kumar 2027329176ccSM. Mohan Kumar strncpy(buffer, target, buflen); 2028329176ccSM. Mohan Kumar P9_DPRINTK(P9_DEBUG_VFS, "%s -> %s\n", dentry->d_name.name, buffer); 2029329176ccSM. Mohan Kumar 2030329176ccSM. Mohan Kumar retval = strnlen(buffer, buflen); 2031329176ccSM. Mohan Kumar return retval; 2032329176ccSM. Mohan Kumar } 2033329176ccSM. Mohan Kumar 2034329176ccSM. Mohan Kumar /** 2035329176ccSM. Mohan Kumar * v9fs_vfs_follow_link_dotl - follow a symlink path 2036329176ccSM. Mohan Kumar * @dentry: dentry for symlink 2037329176ccSM. Mohan Kumar * @nd: nameidata 2038329176ccSM. Mohan Kumar * 2039329176ccSM. Mohan Kumar */ 2040329176ccSM. Mohan Kumar 2041329176ccSM. Mohan Kumar static void * 2042329176ccSM. Mohan Kumar v9fs_vfs_follow_link_dotl(struct dentry *dentry, struct nameidata *nd) 2043329176ccSM. Mohan Kumar { 2044329176ccSM. Mohan Kumar int len = 0; 2045329176ccSM. Mohan Kumar char *link = __getname(); 2046329176ccSM. Mohan Kumar 2047329176ccSM. Mohan Kumar P9_DPRINTK(P9_DEBUG_VFS, "%s n", dentry->d_name.name); 2048329176ccSM. Mohan Kumar 2049329176ccSM. Mohan Kumar if (!link) 2050329176ccSM. Mohan Kumar link = ERR_PTR(-ENOMEM); 2051329176ccSM. Mohan Kumar else { 2052329176ccSM. Mohan Kumar len = v9fs_vfs_readlink_dotl(dentry, link, PATH_MAX); 2053329176ccSM. Mohan Kumar if (len < 0) { 2054329176ccSM. Mohan Kumar __putname(link); 2055329176ccSM. Mohan Kumar link = ERR_PTR(len); 2056329176ccSM. Mohan Kumar } else 2057329176ccSM. Mohan Kumar link[min(len, PATH_MAX-1)] = 0; 2058329176ccSM. Mohan Kumar } 2059329176ccSM. Mohan Kumar nd_set_link(nd, link); 2060329176ccSM. Mohan Kumar 2061329176ccSM. Mohan Kumar return NULL; 2062329176ccSM. Mohan Kumar } 2063329176ccSM. Mohan Kumar 20649b6533c9SSripathi Kodi static const struct inode_operations v9fs_dir_inode_operations_dotu = { 20659b6533c9SSripathi Kodi .create = v9fs_vfs_create, 20669b6533c9SSripathi Kodi .lookup = v9fs_vfs_lookup, 20679b6533c9SSripathi Kodi .symlink = v9fs_vfs_symlink, 206850cc42ffSVenkateswararao Jujjuri (JV) .link = v9fs_vfs_link, 20699b6533c9SSripathi Kodi .unlink = v9fs_vfs_unlink, 20709b6533c9SSripathi Kodi .mkdir = v9fs_vfs_mkdir, 20719b6533c9SSripathi Kodi .rmdir = v9fs_vfs_rmdir, 20721d76e313SAneesh Kumar K.V .mknod = v9fs_vfs_mknod, 20739b6533c9SSripathi Kodi .rename = v9fs_vfs_rename, 20749b6533c9SSripathi Kodi .getattr = v9fs_vfs_getattr, 20759b6533c9SSripathi Kodi .setattr = v9fs_vfs_setattr, 20769b6533c9SSripathi Kodi }; 20779b6533c9SSripathi Kodi 20789b6533c9SSripathi Kodi static const struct inode_operations v9fs_dir_inode_operations_dotl = { 20795643135aSVenkateswararao Jujjuri (JV) .create = v9fs_vfs_create_dotl, 20802bad8471SEric Van Hensbergen .lookup = v9fs_vfs_lookup, 208150cc42ffSVenkateswararao Jujjuri (JV) .link = v9fs_vfs_link_dotl, 208250cc42ffSVenkateswararao Jujjuri (JV) .symlink = v9fs_vfs_symlink_dotl, 20832bad8471SEric Van Hensbergen .unlink = v9fs_vfs_unlink, 208401a622bdSM. Mohan Kumar .mkdir = v9fs_vfs_mkdir_dotl, 20852bad8471SEric Van Hensbergen .rmdir = v9fs_vfs_rmdir, 20864b43516aSM. Mohan Kumar .mknod = v9fs_vfs_mknod_dotl, 20872bad8471SEric Van Hensbergen .rename = v9fs_vfs_rename, 2088f0853122SSripathi Kodi .getattr = v9fs_vfs_getattr_dotl, 208987d7845aSSripathi Kodi .setattr = v9fs_vfs_setattr_dotl, 2090ebf46264SAneesh Kumar K.V .setxattr = generic_setxattr, 2091ebf46264SAneesh Kumar K.V .getxattr = generic_getxattr, 2092ebf46264SAneesh Kumar K.V .removexattr = generic_removexattr, 2093ebf46264SAneesh Kumar K.V .listxattr = v9fs_listxattr, 209485ff872dSAneesh Kumar K.V .check_acl = v9fs_check_acl, 20952bad8471SEric Van Hensbergen }; 20962bad8471SEric Van Hensbergen 2097754661f1SArjan van de Ven static const struct inode_operations v9fs_dir_inode_operations = { 2098b501611aSEric Van Hensbergen .create = v9fs_vfs_create, 2099b501611aSEric Van Hensbergen .lookup = v9fs_vfs_lookup, 2100b501611aSEric Van Hensbergen .unlink = v9fs_vfs_unlink, 2101b501611aSEric Van Hensbergen .mkdir = v9fs_vfs_mkdir, 2102b501611aSEric Van Hensbergen .rmdir = v9fs_vfs_rmdir, 2103b501611aSEric Van Hensbergen .mknod = v9fs_vfs_mknod, 2104b501611aSEric Van Hensbergen .rename = v9fs_vfs_rename, 2105b501611aSEric Van Hensbergen .getattr = v9fs_vfs_getattr, 2106b501611aSEric Van Hensbergen .setattr = v9fs_vfs_setattr, 2107b501611aSEric Van Hensbergen }; 2108b501611aSEric Van Hensbergen 2109754661f1SArjan van de Ven static const struct inode_operations v9fs_file_inode_operations = { 21102bad8471SEric Van Hensbergen .getattr = v9fs_vfs_getattr, 21112bad8471SEric Van Hensbergen .setattr = v9fs_vfs_setattr, 21122bad8471SEric Van Hensbergen }; 21132bad8471SEric Van Hensbergen 21149b6533c9SSripathi Kodi static const struct inode_operations v9fs_file_inode_operations_dotl = { 2115f0853122SSripathi Kodi .getattr = v9fs_vfs_getattr_dotl, 211687d7845aSSripathi Kodi .setattr = v9fs_vfs_setattr_dotl, 2117ebf46264SAneesh Kumar K.V .setxattr = generic_setxattr, 2118ebf46264SAneesh Kumar K.V .getxattr = generic_getxattr, 2119ebf46264SAneesh Kumar K.V .removexattr = generic_removexattr, 2120ebf46264SAneesh Kumar K.V .listxattr = v9fs_listxattr, 212185ff872dSAneesh Kumar K.V .check_acl = v9fs_check_acl, 21229b6533c9SSripathi Kodi }; 21239b6533c9SSripathi Kodi 2124754661f1SArjan van de Ven static const struct inode_operations v9fs_symlink_inode_operations = { 2125204f2f0eSAl Viro .readlink = generic_readlink, 21262bad8471SEric Van Hensbergen .follow_link = v9fs_vfs_follow_link, 21272bad8471SEric Van Hensbergen .put_link = v9fs_vfs_put_link, 21282bad8471SEric Van Hensbergen .getattr = v9fs_vfs_getattr, 21292bad8471SEric Van Hensbergen .setattr = v9fs_vfs_setattr, 21302bad8471SEric Van Hensbergen }; 21319b6533c9SSripathi Kodi 21329b6533c9SSripathi Kodi static const struct inode_operations v9fs_symlink_inode_operations_dotl = { 2133329176ccSM. Mohan Kumar .readlink = v9fs_vfs_readlink_dotl, 2134329176ccSM. Mohan Kumar .follow_link = v9fs_vfs_follow_link_dotl, 21359b6533c9SSripathi Kodi .put_link = v9fs_vfs_put_link, 2136f0853122SSripathi Kodi .getattr = v9fs_vfs_getattr_dotl, 213787d7845aSSripathi Kodi .setattr = v9fs_vfs_setattr_dotl, 2138ebf46264SAneesh Kumar K.V .setxattr = generic_setxattr, 2139ebf46264SAneesh Kumar K.V .getxattr = generic_getxattr, 2140ebf46264SAneesh Kumar K.V .removexattr = generic_removexattr, 2141ebf46264SAneesh Kumar K.V .listxattr = v9fs_listxattr, 21429b6533c9SSripathi Kodi }; 2143