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> 39bd238fb4SLatchesar Ionkov #include <net/9p/9p.h> 40bd238fb4SLatchesar Ionkov #include <net/9p/client.h> 412bad8471SEric Van Hensbergen 422bad8471SEric Van Hensbergen #include "v9fs.h" 432bad8471SEric Van Hensbergen #include "v9fs_vfs.h" 442bad8471SEric Van Hensbergen #include "fid.h" 4560e78d2cSAbhishek Kulkarni #include "cache.h" 46ebf46264SAneesh Kumar K.V #include "xattr.h" 472bad8471SEric Van Hensbergen 48754661f1SArjan van de Ven static const struct inode_operations v9fs_dir_inode_operations; 499b6533c9SSripathi Kodi static const struct inode_operations v9fs_dir_inode_operations_dotu; 509b6533c9SSripathi Kodi static const struct inode_operations v9fs_dir_inode_operations_dotl; 51754661f1SArjan van de Ven static const struct inode_operations v9fs_file_inode_operations; 529b6533c9SSripathi Kodi static const struct inode_operations v9fs_file_inode_operations_dotl; 53754661f1SArjan van de Ven static const struct inode_operations v9fs_symlink_inode_operations; 549b6533c9SSripathi Kodi static const struct inode_operations v9fs_symlink_inode_operations_dotl; 552bad8471SEric Van Hensbergen 562bad8471SEric Van Hensbergen /** 572bad8471SEric Van Hensbergen * unixmode2p9mode - convert unix mode bits to plan 9 582bad8471SEric Van Hensbergen * @v9ses: v9fs session information 592bad8471SEric Van Hensbergen * @mode: mode to convert 602bad8471SEric Van Hensbergen * 612bad8471SEric Van Hensbergen */ 622bad8471SEric Van Hensbergen 6373c592b9SEric Van Hensbergen static int unixmode2p9mode(struct v9fs_session_info *v9ses, int mode) 642bad8471SEric Van Hensbergen { 652bad8471SEric Van Hensbergen int res; 662bad8471SEric Van Hensbergen res = mode & 0777; 672bad8471SEric Van Hensbergen if (S_ISDIR(mode)) 68bd238fb4SLatchesar Ionkov res |= P9_DMDIR; 69dd6102fbSSripathi Kodi if (v9fs_proto_dotu(v9ses)) { 702bad8471SEric Van Hensbergen if (S_ISLNK(mode)) 71bd238fb4SLatchesar Ionkov res |= P9_DMSYMLINK; 722bad8471SEric Van Hensbergen if (v9ses->nodev == 0) { 732bad8471SEric Van Hensbergen if (S_ISSOCK(mode)) 74bd238fb4SLatchesar Ionkov res |= P9_DMSOCKET; 752bad8471SEric Van Hensbergen if (S_ISFIFO(mode)) 76bd238fb4SLatchesar Ionkov res |= P9_DMNAMEDPIPE; 772bad8471SEric Van Hensbergen if (S_ISBLK(mode)) 78bd238fb4SLatchesar Ionkov res |= P9_DMDEVICE; 792bad8471SEric Van Hensbergen if (S_ISCHR(mode)) 80bd238fb4SLatchesar Ionkov res |= P9_DMDEVICE; 812bad8471SEric Van Hensbergen } 822bad8471SEric Van Hensbergen 832bad8471SEric Van Hensbergen if ((mode & S_ISUID) == S_ISUID) 84bd238fb4SLatchesar Ionkov res |= P9_DMSETUID; 852bad8471SEric Van Hensbergen if ((mode & S_ISGID) == S_ISGID) 86bd238fb4SLatchesar Ionkov res |= P9_DMSETGID; 87d199d652SAnthony Liguori if ((mode & S_ISVTX) == S_ISVTX) 88d199d652SAnthony Liguori res |= P9_DMSETVTX; 89bd238fb4SLatchesar Ionkov if ((mode & P9_DMLINK)) 90bd238fb4SLatchesar Ionkov res |= P9_DMLINK; 912bad8471SEric Van Hensbergen } 922bad8471SEric Van Hensbergen 932bad8471SEric Van Hensbergen return res; 942bad8471SEric Van Hensbergen } 952bad8471SEric Van Hensbergen 962bad8471SEric Van Hensbergen /** 972bad8471SEric Van Hensbergen * p9mode2unixmode- convert plan9 mode bits to unix mode bits 982bad8471SEric Van Hensbergen * @v9ses: v9fs session information 992bad8471SEric Van Hensbergen * @mode: mode to convert 1002bad8471SEric Van Hensbergen * 1012bad8471SEric Van Hensbergen */ 1022bad8471SEric Van Hensbergen 10373c592b9SEric Van Hensbergen static int p9mode2unixmode(struct v9fs_session_info *v9ses, int mode) 1042bad8471SEric Van Hensbergen { 1052bad8471SEric Van Hensbergen int res; 1062bad8471SEric Van Hensbergen 1072bad8471SEric Van Hensbergen res = mode & 0777; 1082bad8471SEric Van Hensbergen 109bd238fb4SLatchesar Ionkov if ((mode & P9_DMDIR) == P9_DMDIR) 1102bad8471SEric Van Hensbergen res |= S_IFDIR; 111dd6102fbSSripathi Kodi else if ((mode & P9_DMSYMLINK) && (v9fs_proto_dotu(v9ses))) 1122bad8471SEric Van Hensbergen res |= S_IFLNK; 113dd6102fbSSripathi Kodi else if ((mode & P9_DMSOCKET) && (v9fs_proto_dotu(v9ses)) 1142bad8471SEric Van Hensbergen && (v9ses->nodev == 0)) 1152bad8471SEric Van Hensbergen res |= S_IFSOCK; 116dd6102fbSSripathi Kodi else if ((mode & P9_DMNAMEDPIPE) && (v9fs_proto_dotu(v9ses)) 1172bad8471SEric Van Hensbergen && (v9ses->nodev == 0)) 1182bad8471SEric Van Hensbergen res |= S_IFIFO; 119dd6102fbSSripathi Kodi else if ((mode & P9_DMDEVICE) && (v9fs_proto_dotu(v9ses)) 1202bad8471SEric Van Hensbergen && (v9ses->nodev == 0)) 1212bad8471SEric Van Hensbergen res |= S_IFBLK; 1222bad8471SEric Van Hensbergen else 1232bad8471SEric Van Hensbergen res |= S_IFREG; 1242bad8471SEric Van Hensbergen 125dd6102fbSSripathi Kodi if (v9fs_proto_dotu(v9ses)) { 126bd238fb4SLatchesar Ionkov if ((mode & P9_DMSETUID) == P9_DMSETUID) 1272bad8471SEric Van Hensbergen res |= S_ISUID; 1282bad8471SEric Van Hensbergen 129bd238fb4SLatchesar Ionkov if ((mode & P9_DMSETGID) == P9_DMSETGID) 1302bad8471SEric Van Hensbergen res |= S_ISGID; 131d199d652SAnthony Liguori 132d199d652SAnthony Liguori if ((mode & P9_DMSETVTX) == P9_DMSETVTX) 133d199d652SAnthony Liguori res |= S_ISVTX; 1342bad8471SEric Van Hensbergen } 1352bad8471SEric Van Hensbergen 1362bad8471SEric Van Hensbergen return res; 1372bad8471SEric Van Hensbergen } 1382bad8471SEric Van Hensbergen 139ee443996SEric Van Hensbergen /** 140ee443996SEric Van Hensbergen * v9fs_uflags2omode- convert posix open flags to plan 9 mode bits 141ee443996SEric Van Hensbergen * @uflags: flags to convert 1422e4bef41SEric Van Hensbergen * @extended: if .u extensions are active 143ee443996SEric Van Hensbergen */ 144ee443996SEric Van Hensbergen 1452e4bef41SEric Van Hensbergen int v9fs_uflags2omode(int uflags, int extended) 1466a3124a3SLatchesar Ionkov { 1476a3124a3SLatchesar Ionkov int ret; 1486a3124a3SLatchesar Ionkov 1496a3124a3SLatchesar Ionkov ret = 0; 1506a3124a3SLatchesar Ionkov switch (uflags&3) { 1516a3124a3SLatchesar Ionkov default: 1526a3124a3SLatchesar Ionkov case O_RDONLY: 153bd238fb4SLatchesar Ionkov ret = P9_OREAD; 1546a3124a3SLatchesar Ionkov break; 1556a3124a3SLatchesar Ionkov 1566a3124a3SLatchesar Ionkov case O_WRONLY: 157bd238fb4SLatchesar Ionkov ret = P9_OWRITE; 1586a3124a3SLatchesar Ionkov break; 1596a3124a3SLatchesar Ionkov 1606a3124a3SLatchesar Ionkov case O_RDWR: 161bd238fb4SLatchesar Ionkov ret = P9_ORDWR; 1626a3124a3SLatchesar Ionkov break; 1636a3124a3SLatchesar Ionkov } 1646a3124a3SLatchesar Ionkov 1656a3124a3SLatchesar Ionkov if (uflags & O_TRUNC) 166bd238fb4SLatchesar Ionkov ret |= P9_OTRUNC; 1676a3124a3SLatchesar Ionkov 1682e4bef41SEric Van Hensbergen if (extended) { 1692e4bef41SEric Van Hensbergen if (uflags & O_EXCL) 1702e4bef41SEric Van Hensbergen ret |= P9_OEXCL; 1712e4bef41SEric Van Hensbergen 1726a3124a3SLatchesar Ionkov if (uflags & O_APPEND) 173bd238fb4SLatchesar Ionkov ret |= P9_OAPPEND; 1742e4bef41SEric Van Hensbergen } 1756a3124a3SLatchesar Ionkov 1766a3124a3SLatchesar Ionkov return ret; 1776a3124a3SLatchesar Ionkov } 1786a3124a3SLatchesar Ionkov 1792bad8471SEric Van Hensbergen /** 180531b1094SLatchesar Ionkov * v9fs_blank_wstat - helper function to setup a 9P stat structure 181531b1094SLatchesar Ionkov * @wstat: structure to initialize 1822bad8471SEric Van Hensbergen * 1832bad8471SEric Van Hensbergen */ 1842bad8471SEric Van Hensbergen 1857a4439c4SM. Mohan Kumar void 186bd238fb4SLatchesar Ionkov v9fs_blank_wstat(struct p9_wstat *wstat) 1872bad8471SEric Van Hensbergen { 188531b1094SLatchesar Ionkov wstat->type = ~0; 189531b1094SLatchesar Ionkov wstat->dev = ~0; 190531b1094SLatchesar Ionkov wstat->qid.type = ~0; 191531b1094SLatchesar Ionkov wstat->qid.version = ~0; 192531b1094SLatchesar Ionkov *((long long *)&wstat->qid.path) = ~0; 193531b1094SLatchesar Ionkov wstat->mode = ~0; 194531b1094SLatchesar Ionkov wstat->atime = ~0; 195531b1094SLatchesar Ionkov wstat->mtime = ~0; 196531b1094SLatchesar Ionkov wstat->length = ~0; 197531b1094SLatchesar Ionkov wstat->name = NULL; 198531b1094SLatchesar Ionkov wstat->uid = NULL; 199531b1094SLatchesar Ionkov wstat->gid = NULL; 200531b1094SLatchesar Ionkov wstat->muid = NULL; 201531b1094SLatchesar Ionkov wstat->n_uid = ~0; 202531b1094SLatchesar Ionkov wstat->n_gid = ~0; 203531b1094SLatchesar Ionkov wstat->n_muid = ~0; 204531b1094SLatchesar Ionkov wstat->extension = NULL; 2052bad8471SEric Van Hensbergen } 2062bad8471SEric Van Hensbergen 20760e78d2cSAbhishek Kulkarni #ifdef CONFIG_9P_FSCACHE 20860e78d2cSAbhishek Kulkarni /** 20960e78d2cSAbhishek Kulkarni * v9fs_alloc_inode - helper function to allocate an inode 21060e78d2cSAbhishek Kulkarni * This callback is executed before setting up the inode so that we 21160e78d2cSAbhishek Kulkarni * can associate a vcookie with each inode. 21260e78d2cSAbhishek Kulkarni * 21360e78d2cSAbhishek Kulkarni */ 21460e78d2cSAbhishek Kulkarni 21560e78d2cSAbhishek Kulkarni struct inode *v9fs_alloc_inode(struct super_block *sb) 21660e78d2cSAbhishek Kulkarni { 21760e78d2cSAbhishek Kulkarni struct v9fs_cookie *vcookie; 21860e78d2cSAbhishek Kulkarni vcookie = (struct v9fs_cookie *)kmem_cache_alloc(vcookie_cache, 21960e78d2cSAbhishek Kulkarni GFP_KERNEL); 22060e78d2cSAbhishek Kulkarni if (!vcookie) 22160e78d2cSAbhishek Kulkarni return NULL; 22260e78d2cSAbhishek Kulkarni 22360e78d2cSAbhishek Kulkarni vcookie->fscache = NULL; 22460e78d2cSAbhishek Kulkarni vcookie->qid = NULL; 22560e78d2cSAbhishek Kulkarni spin_lock_init(&vcookie->lock); 22660e78d2cSAbhishek Kulkarni return &vcookie->inode; 22760e78d2cSAbhishek Kulkarni } 22860e78d2cSAbhishek Kulkarni 22960e78d2cSAbhishek Kulkarni /** 23060e78d2cSAbhishek Kulkarni * v9fs_destroy_inode - destroy an inode 23160e78d2cSAbhishek Kulkarni * 23260e78d2cSAbhishek Kulkarni */ 23360e78d2cSAbhishek Kulkarni 23460e78d2cSAbhishek Kulkarni void v9fs_destroy_inode(struct inode *inode) 23560e78d2cSAbhishek Kulkarni { 23660e78d2cSAbhishek Kulkarni kmem_cache_free(vcookie_cache, v9fs_inode2cookie(inode)); 23760e78d2cSAbhishek Kulkarni } 23860e78d2cSAbhishek Kulkarni #endif 23960e78d2cSAbhishek Kulkarni 2402bad8471SEric Van Hensbergen /** 24109d34ee5SEric Van Hensbergen * v9fs_get_fsgid_for_create - Helper function to get the gid for creating a 24209d34ee5SEric Van Hensbergen * new file system object. This checks the S_ISGID to determine the owning 24309d34ee5SEric Van Hensbergen * group of the new file system object. 24409d34ee5SEric Van Hensbergen */ 24509d34ee5SEric Van Hensbergen 24609d34ee5SEric Van Hensbergen static gid_t v9fs_get_fsgid_for_create(struct inode *dir_inode) 24709d34ee5SEric Van Hensbergen { 24809d34ee5SEric Van Hensbergen BUG_ON(dir_inode == NULL); 24909d34ee5SEric Van Hensbergen 25009d34ee5SEric Van Hensbergen if (dir_inode->i_mode & S_ISGID) { 25109d34ee5SEric Van Hensbergen /* set_gid bit is set.*/ 25209d34ee5SEric Van Hensbergen return dir_inode->i_gid; 25309d34ee5SEric Van Hensbergen } 25409d34ee5SEric Van Hensbergen return current_fsgid(); 25509d34ee5SEric Van Hensbergen } 25609d34ee5SEric Van Hensbergen 25709d34ee5SEric Van Hensbergen /** 25809d34ee5SEric Van Hensbergen * v9fs_dentry_from_dir_inode - helper function to get the dentry from 25909d34ee5SEric Van Hensbergen * dir inode. 26009d34ee5SEric Van Hensbergen * 26109d34ee5SEric Van Hensbergen */ 26209d34ee5SEric Van Hensbergen 26309d34ee5SEric Van Hensbergen struct dentry *v9fs_dentry_from_dir_inode(struct inode *inode) 26409d34ee5SEric Van Hensbergen { 26509d34ee5SEric Van Hensbergen struct dentry *dentry; 26609d34ee5SEric Van Hensbergen 26709d34ee5SEric Van Hensbergen spin_lock(&dcache_lock); 26809d34ee5SEric Van Hensbergen /* Directory should have only one entry. */ 26909d34ee5SEric Van Hensbergen BUG_ON(S_ISDIR(inode->i_mode) && !list_is_singular(&inode->i_dentry)); 27009d34ee5SEric Van Hensbergen dentry = list_entry(inode->i_dentry.next, struct dentry, d_alias); 27109d34ee5SEric Van Hensbergen spin_unlock(&dcache_lock); 27209d34ee5SEric Van Hensbergen return dentry; 27309d34ee5SEric Van Hensbergen } 27409d34ee5SEric Van Hensbergen 27509d34ee5SEric Van Hensbergen /** 2762bad8471SEric Van Hensbergen * v9fs_get_inode - helper function to setup an inode 2772bad8471SEric Van Hensbergen * @sb: superblock 2782bad8471SEric Van Hensbergen * @mode: mode to setup inode with 2792bad8471SEric Van Hensbergen * 2802bad8471SEric Van Hensbergen */ 2812bad8471SEric Van Hensbergen 2822bad8471SEric Van Hensbergen struct inode *v9fs_get_inode(struct super_block *sb, int mode) 2832bad8471SEric Van Hensbergen { 2842bb54115SAbhishek Kulkarni int err; 2856a3124a3SLatchesar Ionkov struct inode *inode; 286b501611aSEric Van Hensbergen struct v9fs_session_info *v9ses = sb->s_fs_info; 2872bad8471SEric Van Hensbergen 288bd238fb4SLatchesar Ionkov P9_DPRINTK(P9_DEBUG_VFS, "super block: %p mode: %o\n", sb, mode); 2892bad8471SEric Van Hensbergen 2902bad8471SEric Van Hensbergen inode = new_inode(sb); 2912bb54115SAbhishek Kulkarni if (!inode) { 2922bb54115SAbhishek Kulkarni P9_EPRINTK(KERN_WARNING, "Problem allocating inode\n"); 29348559b4cSAbhishek Kulkarni return ERR_PTR(-ENOMEM); 2942bb54115SAbhishek Kulkarni } 2952bb54115SAbhishek Kulkarni 296217f206dSDmitry Monakhov inode_init_owner(inode, NULL, mode); 2972bad8471SEric Van Hensbergen inode->i_blocks = 0; 2982bad8471SEric Van Hensbergen inode->i_rdev = 0; 2992bad8471SEric Van Hensbergen inode->i_atime = inode->i_mtime = inode->i_ctime = CURRENT_TIME; 300147b31cfSEric Van Hensbergen inode->i_mapping->a_ops = &v9fs_addr_operations; 3012bad8471SEric Van Hensbergen 3022bad8471SEric Van Hensbergen switch (mode & S_IFMT) { 3032bad8471SEric Van Hensbergen case S_IFIFO: 3042bad8471SEric Van Hensbergen case S_IFBLK: 3052bad8471SEric Van Hensbergen case S_IFCHR: 3062bad8471SEric Van Hensbergen case S_IFSOCK: 3074b43516aSM. Mohan Kumar if (v9fs_proto_dotl(v9ses)) { 3084b43516aSM. Mohan Kumar inode->i_op = &v9fs_file_inode_operations_dotl; 3094b43516aSM. Mohan Kumar inode->i_fop = &v9fs_file_operations_dotl; 3104b43516aSM. Mohan Kumar } else if (v9fs_proto_dotu(v9ses)) { 3114b43516aSM. Mohan Kumar inode->i_op = &v9fs_file_inode_operations; 3124b43516aSM. Mohan Kumar inode->i_fop = &v9fs_file_operations; 3134b43516aSM. Mohan Kumar } else { 314bd238fb4SLatchesar Ionkov P9_DPRINTK(P9_DEBUG_ERROR, 315bd238fb4SLatchesar Ionkov "special files without extended mode\n"); 3162bb54115SAbhishek Kulkarni err = -EINVAL; 3172bb54115SAbhishek Kulkarni goto error; 318b501611aSEric Van Hensbergen } 3192bb54115SAbhishek Kulkarni init_special_inode(inode, inode->i_mode, inode->i_rdev); 3205d58bec5SEric Van Hensbergen break; 3212bad8471SEric Van Hensbergen case S_IFREG: 3229b6533c9SSripathi Kodi if (v9fs_proto_dotl(v9ses)) { 3239b6533c9SSripathi Kodi inode->i_op = &v9fs_file_inode_operations_dotl; 3249b6533c9SSripathi Kodi inode->i_fop = &v9fs_file_operations_dotl; 3259b6533c9SSripathi Kodi } else { 3262bad8471SEric Van Hensbergen inode->i_op = &v9fs_file_inode_operations; 3272bad8471SEric Van Hensbergen inode->i_fop = &v9fs_file_operations; 3289b6533c9SSripathi Kodi } 3299b6533c9SSripathi Kodi 3302bad8471SEric Van Hensbergen break; 3319b6533c9SSripathi Kodi 332b501611aSEric Van Hensbergen case S_IFLNK: 3339b6533c9SSripathi Kodi if (!v9fs_proto_dotu(v9ses) && !v9fs_proto_dotl(v9ses)) { 3349b6533c9SSripathi Kodi P9_DPRINTK(P9_DEBUG_ERROR, "extended modes used with " 3359b6533c9SSripathi Kodi "legacy protocol.\n"); 3362bb54115SAbhishek Kulkarni err = -EINVAL; 3372bb54115SAbhishek Kulkarni goto error; 338b501611aSEric Van Hensbergen } 3399b6533c9SSripathi Kodi 3409b6533c9SSripathi Kodi if (v9fs_proto_dotl(v9ses)) 3419b6533c9SSripathi Kodi inode->i_op = &v9fs_symlink_inode_operations_dotl; 3429b6533c9SSripathi Kodi else 343b501611aSEric Van Hensbergen inode->i_op = &v9fs_symlink_inode_operations; 3449b6533c9SSripathi Kodi 345b501611aSEric Van Hensbergen break; 3462bad8471SEric Van Hensbergen case S_IFDIR: 347d8c76e6fSDave Hansen inc_nlink(inode); 3489b6533c9SSripathi Kodi if (v9fs_proto_dotl(v9ses)) 3499b6533c9SSripathi Kodi inode->i_op = &v9fs_dir_inode_operations_dotl; 3509b6533c9SSripathi Kodi else if (v9fs_proto_dotu(v9ses)) 3519b6533c9SSripathi Kodi inode->i_op = &v9fs_dir_inode_operations_dotu; 352b501611aSEric Van Hensbergen else 3532bad8471SEric Van Hensbergen inode->i_op = &v9fs_dir_inode_operations; 3549b6533c9SSripathi Kodi 3559b6533c9SSripathi Kodi if (v9fs_proto_dotl(v9ses)) 3569b6533c9SSripathi Kodi inode->i_fop = &v9fs_dir_operations_dotl; 3579b6533c9SSripathi Kodi else 3582bad8471SEric Van Hensbergen inode->i_fop = &v9fs_dir_operations; 3599b6533c9SSripathi Kodi 3602bad8471SEric Van Hensbergen break; 3612bad8471SEric Van Hensbergen default: 3622bb54115SAbhishek Kulkarni P9_DPRINTK(P9_DEBUG_ERROR, "BAD mode 0x%x S_IFMT 0x%x\n", 3632bad8471SEric Van Hensbergen mode, mode & S_IFMT); 3642bb54115SAbhishek Kulkarni err = -EINVAL; 3652bb54115SAbhishek Kulkarni goto error; 3662bad8471SEric Van Hensbergen } 3672bb54115SAbhishek Kulkarni 3682bad8471SEric Van Hensbergen return inode; 3692bb54115SAbhishek Kulkarni 3702bb54115SAbhishek Kulkarni error: 3712bb54115SAbhishek Kulkarni iput(inode); 3722bb54115SAbhishek Kulkarni return ERR_PTR(err); 3732bad8471SEric Van Hensbergen } 3742bad8471SEric Van Hensbergen 375bd238fb4SLatchesar Ionkov /* 3766a3124a3SLatchesar Ionkov static struct v9fs_fid* 3776a3124a3SLatchesar Ionkov v9fs_clone_walk(struct v9fs_session_info *v9ses, u32 fid, struct dentry *dentry) 3786a3124a3SLatchesar Ionkov { 3796a3124a3SLatchesar Ionkov int err; 380736c4b85SMika Kukkonen int nfid; 3816a3124a3SLatchesar Ionkov struct v9fs_fid *ret; 3826a3124a3SLatchesar Ionkov struct v9fs_fcall *fcall; 3830b8dd177SLatchesar Ionkov 3846a3124a3SLatchesar Ionkov nfid = v9fs_get_idpool(&v9ses->fidpool); 3856a3124a3SLatchesar Ionkov if (nfid < 0) { 3860b8dd177SLatchesar Ionkov eprintk(KERN_WARNING, "no free fids available\n"); 387731805b4SLatchesar Ionkov return ERR_PTR(-ENOSPC); 3880b8dd177SLatchesar Ionkov } 3890b8dd177SLatchesar Ionkov 3906a3124a3SLatchesar Ionkov err = v9fs_t_walk(v9ses, fid, nfid, (char *) dentry->d_name.name, 3916a3124a3SLatchesar Ionkov &fcall); 3926a3124a3SLatchesar Ionkov 3936a3124a3SLatchesar Ionkov if (err < 0) { 39441e5a6acSLatchesar Ionkov if (fcall && fcall->id == RWALK) 39541e5a6acSLatchesar Ionkov goto clunk_fid; 39641e5a6acSLatchesar Ionkov 3976a3124a3SLatchesar Ionkov PRINT_FCALL_ERROR("walk error", fcall); 3986a3124a3SLatchesar Ionkov v9fs_put_idpool(nfid, &v9ses->fidpool); 3996a3124a3SLatchesar Ionkov goto error; 4000b8dd177SLatchesar Ionkov } 4016a3124a3SLatchesar Ionkov 4023cf6429aSLatchesar Ionkov kfree(fcall); 4033cf6429aSLatchesar Ionkov fcall = NULL; 4046a3124a3SLatchesar Ionkov ret = v9fs_fid_create(v9ses, nfid); 4056a3124a3SLatchesar Ionkov if (!ret) { 4066a3124a3SLatchesar Ionkov err = -ENOMEM; 4076a3124a3SLatchesar Ionkov goto clunk_fid; 4080b8dd177SLatchesar Ionkov } 4092bad8471SEric Van Hensbergen 4106a3124a3SLatchesar Ionkov err = v9fs_fid_insert(ret, dentry); 4116a3124a3SLatchesar Ionkov if (err < 0) { 4126a3124a3SLatchesar Ionkov v9fs_fid_destroy(ret); 4136a3124a3SLatchesar Ionkov goto clunk_fid; 4146a3124a3SLatchesar Ionkov } 4152bad8471SEric Van Hensbergen 4166a3124a3SLatchesar Ionkov return ret; 4176a3124a3SLatchesar Ionkov 4186a3124a3SLatchesar Ionkov clunk_fid: 4196a3124a3SLatchesar Ionkov v9fs_t_clunk(v9ses, nfid); 4206a3124a3SLatchesar Ionkov 4216a3124a3SLatchesar Ionkov error: 4226a3124a3SLatchesar Ionkov kfree(fcall); 4236a3124a3SLatchesar Ionkov return ERR_PTR(err); 4246a3124a3SLatchesar Ionkov } 425bd238fb4SLatchesar Ionkov */ 4266a3124a3SLatchesar Ionkov 42760e78d2cSAbhishek Kulkarni 42860e78d2cSAbhishek Kulkarni /** 42960e78d2cSAbhishek Kulkarni * v9fs_clear_inode - release an inode 43060e78d2cSAbhishek Kulkarni * @inode: inode to release 43160e78d2cSAbhishek Kulkarni * 43260e78d2cSAbhishek Kulkarni */ 43360e78d2cSAbhishek Kulkarni void v9fs_clear_inode(struct inode *inode) 43460e78d2cSAbhishek Kulkarni { 43560e78d2cSAbhishek Kulkarni filemap_fdatawrite(inode->i_mapping); 43660e78d2cSAbhishek Kulkarni 43760e78d2cSAbhishek Kulkarni #ifdef CONFIG_9P_FSCACHE 43860e78d2cSAbhishek Kulkarni v9fs_cache_inode_put_cookie(inode); 43960e78d2cSAbhishek Kulkarni #endif 44060e78d2cSAbhishek Kulkarni } 44160e78d2cSAbhishek Kulkarni 4425174fdabSLatchesar Ionkov static struct inode * 443f0853122SSripathi Kodi v9fs_inode(struct v9fs_session_info *v9ses, struct p9_fid *fid, 4446a3124a3SLatchesar Ionkov struct super_block *sb) 4456a3124a3SLatchesar Ionkov { 4466a3124a3SLatchesar Ionkov int err, umode; 447f0853122SSripathi Kodi struct inode *ret = NULL; 44851a87c55SEric Van Hensbergen struct p9_wstat *st; 4496a3124a3SLatchesar Ionkov 450bd238fb4SLatchesar Ionkov st = p9_client_stat(fid); 45102bc3567SAbhishek Kulkarni if (IS_ERR(st)) 45202bc3567SAbhishek Kulkarni return ERR_CAST(st); 4532bad8471SEric Van Hensbergen 454bd238fb4SLatchesar Ionkov umode = p9mode2unixmode(v9ses, st->mode); 4556a3124a3SLatchesar Ionkov ret = v9fs_get_inode(sb, umode); 4566a3124a3SLatchesar Ionkov if (IS_ERR(ret)) { 4576a3124a3SLatchesar Ionkov err = PTR_ERR(ret); 4586a3124a3SLatchesar Ionkov goto error; 4592bad8471SEric Van Hensbergen } 4602bad8471SEric Van Hensbergen 461bd238fb4SLatchesar Ionkov v9fs_stat2inode(st, ret, sb); 462bd238fb4SLatchesar Ionkov ret->i_ino = v9fs_qid2ino(&st->qid); 46360e78d2cSAbhishek Kulkarni 46460e78d2cSAbhishek Kulkarni #ifdef CONFIG_9P_FSCACHE 46560e78d2cSAbhishek Kulkarni v9fs_vcookie_set_qid(ret, &st->qid); 46660e78d2cSAbhishek Kulkarni v9fs_cache_inode_get_cookie(ret); 46760e78d2cSAbhishek Kulkarni #endif 46802bc3567SAbhishek Kulkarni p9stat_free(st); 469bd238fb4SLatchesar Ionkov kfree(st); 4706a3124a3SLatchesar Ionkov return ret; 4716a3124a3SLatchesar Ionkov error: 47202bc3567SAbhishek Kulkarni p9stat_free(st); 473bd238fb4SLatchesar Ionkov kfree(st); 4746a3124a3SLatchesar Ionkov return ERR_PTR(err); 4752bad8471SEric Van Hensbergen } 4762bad8471SEric Van Hensbergen 477f0853122SSripathi Kodi static struct inode * 478f0853122SSripathi Kodi v9fs_inode_dotl(struct v9fs_session_info *v9ses, struct p9_fid *fid, 479f0853122SSripathi Kodi struct super_block *sb) 480f0853122SSripathi Kodi { 481f0853122SSripathi Kodi struct inode *ret = NULL; 482f0853122SSripathi Kodi int err; 483f0853122SSripathi Kodi struct p9_stat_dotl *st; 484f0853122SSripathi Kodi 485f0853122SSripathi Kodi st = p9_client_getattr_dotl(fid, P9_STATS_BASIC); 486f0853122SSripathi Kodi if (IS_ERR(st)) 487f0853122SSripathi Kodi return ERR_CAST(st); 488f0853122SSripathi Kodi 489f0853122SSripathi Kodi ret = v9fs_get_inode(sb, st->st_mode); 490f0853122SSripathi Kodi if (IS_ERR(ret)) { 491f0853122SSripathi Kodi err = PTR_ERR(ret); 492f0853122SSripathi Kodi goto error; 493f0853122SSripathi Kodi } 494f0853122SSripathi Kodi 495f0853122SSripathi Kodi v9fs_stat2inode_dotl(st, ret); 496f0853122SSripathi Kodi ret->i_ino = v9fs_qid2ino(&st->qid); 497f0853122SSripathi Kodi #ifdef CONFIG_9P_FSCACHE 498f0853122SSripathi Kodi v9fs_vcookie_set_qid(ret, &st->qid); 499f0853122SSripathi Kodi v9fs_cache_inode_get_cookie(ret); 500f0853122SSripathi Kodi #endif 501f0853122SSripathi Kodi kfree(st); 502f0853122SSripathi Kodi return ret; 503f0853122SSripathi Kodi error: 504f0853122SSripathi Kodi kfree(st); 505f0853122SSripathi Kodi return ERR_PTR(err); 506f0853122SSripathi Kodi } 507f0853122SSripathi Kodi 508f0853122SSripathi Kodi /** 509f0853122SSripathi Kodi * v9fs_inode_from_fid - Helper routine to populate an inode by 510f0853122SSripathi Kodi * issuing a attribute request 511f0853122SSripathi Kodi * @v9ses: session information 512f0853122SSripathi Kodi * @fid: fid to issue attribute request for 513f0853122SSripathi Kodi * @sb: superblock on which to create inode 514f0853122SSripathi Kodi * 515f0853122SSripathi Kodi */ 516f0853122SSripathi Kodi static inline struct inode * 517f0853122SSripathi Kodi v9fs_inode_from_fid(struct v9fs_session_info *v9ses, struct p9_fid *fid, 518f0853122SSripathi Kodi struct super_block *sb) 519f0853122SSripathi Kodi { 520f0853122SSripathi Kodi if (v9fs_proto_dotl(v9ses)) 521f0853122SSripathi Kodi return v9fs_inode_dotl(v9ses, fid, sb); 522f0853122SSripathi Kodi else 523f0853122SSripathi Kodi return v9fs_inode(v9ses, fid, sb); 524f0853122SSripathi Kodi } 525f0853122SSripathi Kodi 5262bad8471SEric Van Hensbergen /** 5272bad8471SEric Van Hensbergen * v9fs_remove - helper function to remove files and directories 52873c592b9SEric Van Hensbergen * @dir: directory inode that is being deleted 52973c592b9SEric Van Hensbergen * @file: dentry that is being deleted 53073c592b9SEric Van Hensbergen * @rmdir: removing a directory 5312bad8471SEric Van Hensbergen * 5322bad8471SEric Van Hensbergen */ 5332bad8471SEric Van Hensbergen 5342bad8471SEric Van Hensbergen static int v9fs_remove(struct inode *dir, struct dentry *file, int rmdir) 5352bad8471SEric Van Hensbergen { 536d994f405SAneesh Kumar K.V int retval; 537bd238fb4SLatchesar Ionkov struct inode *file_inode; 538bd238fb4SLatchesar Ionkov struct p9_fid *v9fid; 5392bad8471SEric Van Hensbergen 540bd238fb4SLatchesar Ionkov P9_DPRINTK(P9_DEBUG_VFS, "inode: %p dentry: %p rmdir: %d\n", dir, file, 5412bad8471SEric Van Hensbergen rmdir); 5422bad8471SEric Van Hensbergen 5432bad8471SEric Van Hensbergen file_inode = file->d_inode; 544c959df9fSLatchesar Ionkov v9fid = v9fs_fid_clone(file); 545da977b2cSEric Van Hensbergen if (IS_ERR(v9fid)) 546da977b2cSEric Van Hensbergen return PTR_ERR(v9fid); 5472bad8471SEric Van Hensbergen 548d994f405SAneesh Kumar K.V retval = p9_client_remove(v9fid); 549d994f405SAneesh Kumar K.V if (!retval) 550d994f405SAneesh Kumar K.V drop_nlink(file_inode); 551d994f405SAneesh Kumar K.V return retval; 5522bad8471SEric Van Hensbergen } 5532bad8471SEric Van Hensbergen 5546a3124a3SLatchesar Ionkov static int 5556a3124a3SLatchesar Ionkov v9fs_open_created(struct inode *inode, struct file *file) 5566a3124a3SLatchesar Ionkov { 5576a3124a3SLatchesar Ionkov return 0; 5586a3124a3SLatchesar Ionkov } 5596a3124a3SLatchesar Ionkov 560bd238fb4SLatchesar Ionkov 561bd238fb4SLatchesar Ionkov /** 562bd238fb4SLatchesar Ionkov * v9fs_create - Create a file 563ee443996SEric Van Hensbergen * @v9ses: session information 564ee443996SEric Van Hensbergen * @dir: directory that dentry is being created in 565bd238fb4SLatchesar Ionkov * @dentry: dentry that is being created 5660e15597eSAbhishek Kulkarni * @extension: 9p2000.u extension string to support devices, etc. 567bd238fb4SLatchesar Ionkov * @perm: create permissions 568bd238fb4SLatchesar Ionkov * @mode: open mode 569bd238fb4SLatchesar Ionkov * 570bd238fb4SLatchesar Ionkov */ 571bd238fb4SLatchesar Ionkov static struct p9_fid * 572bd238fb4SLatchesar Ionkov v9fs_create(struct v9fs_session_info *v9ses, struct inode *dir, 573bd238fb4SLatchesar Ionkov struct dentry *dentry, char *extension, u32 perm, u8 mode) 574bd238fb4SLatchesar Ionkov { 575bd238fb4SLatchesar Ionkov int err; 576bd238fb4SLatchesar Ionkov char *name; 577bd238fb4SLatchesar Ionkov struct p9_fid *dfid, *ofid, *fid; 578bd238fb4SLatchesar Ionkov struct inode *inode; 579bd238fb4SLatchesar Ionkov 58051a87c55SEric Van Hensbergen P9_DPRINTK(P9_DEBUG_VFS, "name %s\n", dentry->d_name.name); 58151a87c55SEric Van Hensbergen 582bd238fb4SLatchesar Ionkov err = 0; 583bd238fb4SLatchesar Ionkov ofid = NULL; 584bd238fb4SLatchesar Ionkov fid = NULL; 585bd238fb4SLatchesar Ionkov name = (char *) dentry->d_name.name; 5866d27e64dSVenkateswararao Jujjuri dfid = v9fs_fid_lookup(dentry->d_parent); 587bd238fb4SLatchesar Ionkov if (IS_ERR(dfid)) { 588bd238fb4SLatchesar Ionkov err = PTR_ERR(dfid); 5896d27e64dSVenkateswararao Jujjuri P9_DPRINTK(P9_DEBUG_VFS, "fid lookup failed %d\n", err); 5906d27e64dSVenkateswararao Jujjuri return ERR_PTR(err); 591bd238fb4SLatchesar Ionkov } 592bd238fb4SLatchesar Ionkov 593bd238fb4SLatchesar Ionkov /* clone a fid to use for creation */ 594bd238fb4SLatchesar Ionkov ofid = p9_client_walk(dfid, 0, NULL, 1); 595bd238fb4SLatchesar Ionkov if (IS_ERR(ofid)) { 596bd238fb4SLatchesar Ionkov err = PTR_ERR(ofid); 59751a87c55SEric Van Hensbergen P9_DPRINTK(P9_DEBUG_VFS, "p9_client_walk failed %d\n", err); 5986d27e64dSVenkateswararao Jujjuri return ERR_PTR(err); 599bd238fb4SLatchesar Ionkov } 600bd238fb4SLatchesar Ionkov 601bd238fb4SLatchesar Ionkov err = p9_client_fcreate(ofid, name, perm, mode, extension); 60251a87c55SEric Van Hensbergen if (err < 0) { 60351a87c55SEric Van Hensbergen P9_DPRINTK(P9_DEBUG_VFS, "p9_client_fcreate failed %d\n", err); 604bd238fb4SLatchesar Ionkov goto error; 60551a87c55SEric Van Hensbergen } 606bd238fb4SLatchesar Ionkov 607bd238fb4SLatchesar Ionkov /* now walk from the parent so we can get unopened fid */ 6086d27e64dSVenkateswararao Jujjuri fid = p9_client_walk(dfid, 1, &name, 1); 609bd238fb4SLatchesar Ionkov if (IS_ERR(fid)) { 610bd238fb4SLatchesar Ionkov err = PTR_ERR(fid); 61151a87c55SEric Van Hensbergen P9_DPRINTK(P9_DEBUG_VFS, "p9_client_walk failed %d\n", err); 612bd238fb4SLatchesar Ionkov fid = NULL; 613bd238fb4SLatchesar Ionkov goto error; 6146d27e64dSVenkateswararao Jujjuri } 615bd238fb4SLatchesar Ionkov 616bd238fb4SLatchesar Ionkov /* instantiate inode and assign the unopened fid to the dentry */ 617bd238fb4SLatchesar Ionkov inode = v9fs_inode_from_fid(v9ses, fid, dir->i_sb); 618bd238fb4SLatchesar Ionkov if (IS_ERR(inode)) { 619bd238fb4SLatchesar Ionkov err = PTR_ERR(inode); 62051a87c55SEric Van Hensbergen P9_DPRINTK(P9_DEBUG_VFS, "inode creation failed %d\n", err); 621bd238fb4SLatchesar Ionkov goto error; 622bd238fb4SLatchesar Ionkov } 623bd238fb4SLatchesar Ionkov 624bd238fb4SLatchesar Ionkov if (v9ses->cache) 625bd238fb4SLatchesar Ionkov dentry->d_op = &v9fs_cached_dentry_operations; 626bd238fb4SLatchesar Ionkov else 627bd238fb4SLatchesar Ionkov dentry->d_op = &v9fs_dentry_operations; 628bd238fb4SLatchesar Ionkov 629bd238fb4SLatchesar Ionkov d_instantiate(dentry, inode); 63050fb6d2bSAbhishek Kulkarni err = v9fs_fid_add(dentry, fid); 63150fb6d2bSAbhishek Kulkarni if (err < 0) 63250fb6d2bSAbhishek Kulkarni goto error; 63350fb6d2bSAbhishek Kulkarni 634bd238fb4SLatchesar Ionkov return ofid; 635bd238fb4SLatchesar Ionkov 636bd238fb4SLatchesar Ionkov error: 637bd238fb4SLatchesar Ionkov if (ofid) 638bd238fb4SLatchesar Ionkov p9_client_clunk(ofid); 639bd238fb4SLatchesar Ionkov 640bd238fb4SLatchesar Ionkov if (fid) 641bd238fb4SLatchesar Ionkov p9_client_clunk(fid); 642bd238fb4SLatchesar Ionkov 643bd238fb4SLatchesar Ionkov return ERR_PTR(err); 644bd238fb4SLatchesar Ionkov } 645bd238fb4SLatchesar Ionkov 6462bad8471SEric Van Hensbergen /** 6475643135aSVenkateswararao Jujjuri (JV) * v9fs_vfs_create_dotl - VFS hook to create files for 9P2000.L protocol. 6485643135aSVenkateswararao Jujjuri (JV) * @dir: directory inode that is being created 6495643135aSVenkateswararao Jujjuri (JV) * @dentry: dentry that is being deleted 6505643135aSVenkateswararao Jujjuri (JV) * @mode: create permissions 6515643135aSVenkateswararao Jujjuri (JV) * @nd: path information 6525643135aSVenkateswararao Jujjuri (JV) * 6535643135aSVenkateswararao Jujjuri (JV) */ 6545643135aSVenkateswararao Jujjuri (JV) 6555643135aSVenkateswararao Jujjuri (JV) static int 6565643135aSVenkateswararao Jujjuri (JV) v9fs_vfs_create_dotl(struct inode *dir, struct dentry *dentry, int mode, 6575643135aSVenkateswararao Jujjuri (JV) struct nameidata *nd) 6585643135aSVenkateswararao Jujjuri (JV) { 6595643135aSVenkateswararao Jujjuri (JV) int err = 0; 6605643135aSVenkateswararao Jujjuri (JV) char *name = NULL; 6615643135aSVenkateswararao Jujjuri (JV) gid_t gid; 6625643135aSVenkateswararao Jujjuri (JV) int flags; 6635643135aSVenkateswararao Jujjuri (JV) struct v9fs_session_info *v9ses; 6645643135aSVenkateswararao Jujjuri (JV) struct p9_fid *fid = NULL; 6655643135aSVenkateswararao Jujjuri (JV) struct p9_fid *dfid, *ofid; 6665643135aSVenkateswararao Jujjuri (JV) struct file *filp; 6675643135aSVenkateswararao Jujjuri (JV) struct p9_qid qid; 6685643135aSVenkateswararao Jujjuri (JV) struct inode *inode; 6695643135aSVenkateswararao Jujjuri (JV) 6705643135aSVenkateswararao Jujjuri (JV) v9ses = v9fs_inode2v9ses(dir); 6715643135aSVenkateswararao Jujjuri (JV) if (nd && nd->flags & LOOKUP_OPEN) 6725643135aSVenkateswararao Jujjuri (JV) flags = nd->intent.open.flags - 1; 6735643135aSVenkateswararao Jujjuri (JV) else 6745643135aSVenkateswararao Jujjuri (JV) flags = O_RDWR; 6755643135aSVenkateswararao Jujjuri (JV) 6765643135aSVenkateswararao Jujjuri (JV) name = (char *) dentry->d_name.name; 6775643135aSVenkateswararao Jujjuri (JV) P9_DPRINTK(P9_DEBUG_VFS, "v9fs_vfs_create_dotl: name:%s flags:0x%x " 6785643135aSVenkateswararao Jujjuri (JV) "mode:0x%x\n", name, flags, mode); 6795643135aSVenkateswararao Jujjuri (JV) 6805643135aSVenkateswararao Jujjuri (JV) dfid = v9fs_fid_lookup(dentry->d_parent); 6815643135aSVenkateswararao Jujjuri (JV) if (IS_ERR(dfid)) { 6825643135aSVenkateswararao Jujjuri (JV) err = PTR_ERR(dfid); 6835643135aSVenkateswararao Jujjuri (JV) P9_DPRINTK(P9_DEBUG_VFS, "fid lookup failed %d\n", err); 6845643135aSVenkateswararao Jujjuri (JV) return err; 6855643135aSVenkateswararao Jujjuri (JV) } 6865643135aSVenkateswararao Jujjuri (JV) 6875643135aSVenkateswararao Jujjuri (JV) /* clone a fid to use for creation */ 6885643135aSVenkateswararao Jujjuri (JV) ofid = p9_client_walk(dfid, 0, NULL, 1); 6895643135aSVenkateswararao Jujjuri (JV) if (IS_ERR(ofid)) { 6905643135aSVenkateswararao Jujjuri (JV) err = PTR_ERR(ofid); 6915643135aSVenkateswararao Jujjuri (JV) P9_DPRINTK(P9_DEBUG_VFS, "p9_client_walk failed %d\n", err); 6925643135aSVenkateswararao Jujjuri (JV) return err; 6935643135aSVenkateswararao Jujjuri (JV) } 6945643135aSVenkateswararao Jujjuri (JV) 6955643135aSVenkateswararao Jujjuri (JV) gid = v9fs_get_fsgid_for_create(dir); 6965643135aSVenkateswararao Jujjuri (JV) err = p9_client_create_dotl(ofid, name, flags, mode, gid, &qid); 6975643135aSVenkateswararao Jujjuri (JV) if (err < 0) { 6985643135aSVenkateswararao Jujjuri (JV) P9_DPRINTK(P9_DEBUG_VFS, 6995643135aSVenkateswararao Jujjuri (JV) "p9_client_open_dotl failed in creat %d\n", 7005643135aSVenkateswararao Jujjuri (JV) err); 7015643135aSVenkateswararao Jujjuri (JV) goto error; 7025643135aSVenkateswararao Jujjuri (JV) } 7035643135aSVenkateswararao Jujjuri (JV) 7045643135aSVenkateswararao Jujjuri (JV) /* No need to populate the inode if we are not opening the file AND 7055643135aSVenkateswararao Jujjuri (JV) * not in cached mode. 7065643135aSVenkateswararao Jujjuri (JV) */ 7075643135aSVenkateswararao Jujjuri (JV) if (!v9ses->cache && !(nd && nd->flags & LOOKUP_OPEN)) { 7085643135aSVenkateswararao Jujjuri (JV) /* Not in cached mode. No need to populate inode with stat */ 7095643135aSVenkateswararao Jujjuri (JV) dentry->d_op = &v9fs_dentry_operations; 7105643135aSVenkateswararao Jujjuri (JV) p9_client_clunk(ofid); 7115643135aSVenkateswararao Jujjuri (JV) d_instantiate(dentry, NULL); 7125643135aSVenkateswararao Jujjuri (JV) return 0; 7135643135aSVenkateswararao Jujjuri (JV) } 7145643135aSVenkateswararao Jujjuri (JV) 7155643135aSVenkateswararao Jujjuri (JV) /* Now walk from the parent so we can get an unopened fid. */ 7165643135aSVenkateswararao Jujjuri (JV) fid = p9_client_walk(dfid, 1, &name, 1); 7175643135aSVenkateswararao Jujjuri (JV) if (IS_ERR(fid)) { 7185643135aSVenkateswararao Jujjuri (JV) err = PTR_ERR(fid); 7195643135aSVenkateswararao Jujjuri (JV) P9_DPRINTK(P9_DEBUG_VFS, "p9_client_walk failed %d\n", err); 7205643135aSVenkateswararao Jujjuri (JV) fid = NULL; 7215643135aSVenkateswararao Jujjuri (JV) goto error; 7225643135aSVenkateswararao Jujjuri (JV) } 7235643135aSVenkateswararao Jujjuri (JV) 7245643135aSVenkateswararao Jujjuri (JV) /* instantiate inode and assign the unopened fid to dentry */ 7255643135aSVenkateswararao Jujjuri (JV) inode = v9fs_inode_from_fid(v9ses, fid, dir->i_sb); 7265643135aSVenkateswararao Jujjuri (JV) if (IS_ERR(inode)) { 7275643135aSVenkateswararao Jujjuri (JV) err = PTR_ERR(inode); 7285643135aSVenkateswararao Jujjuri (JV) P9_DPRINTK(P9_DEBUG_VFS, "inode creation failed %d\n", err); 7295643135aSVenkateswararao Jujjuri (JV) goto error; 7305643135aSVenkateswararao Jujjuri (JV) } 7315643135aSVenkateswararao Jujjuri (JV) dentry->d_op = &v9fs_cached_dentry_operations; 7325643135aSVenkateswararao Jujjuri (JV) d_instantiate(dentry, inode); 7335643135aSVenkateswararao Jujjuri (JV) err = v9fs_fid_add(dentry, fid); 7345643135aSVenkateswararao Jujjuri (JV) if (err < 0) 7355643135aSVenkateswararao Jujjuri (JV) goto error; 7365643135aSVenkateswararao Jujjuri (JV) 7375643135aSVenkateswararao Jujjuri (JV) /* if we are opening a file, assign the open fid to the file */ 7385643135aSVenkateswararao Jujjuri (JV) if (nd && nd->flags & LOOKUP_OPEN) { 7395643135aSVenkateswararao Jujjuri (JV) filp = lookup_instantiate_filp(nd, dentry, v9fs_open_created); 7405643135aSVenkateswararao Jujjuri (JV) if (IS_ERR(filp)) { 7415643135aSVenkateswararao Jujjuri (JV) p9_client_clunk(ofid); 7425643135aSVenkateswararao Jujjuri (JV) return PTR_ERR(filp); 7435643135aSVenkateswararao Jujjuri (JV) } 7445643135aSVenkateswararao Jujjuri (JV) filp->private_data = ofid; 7455643135aSVenkateswararao Jujjuri (JV) } else 7465643135aSVenkateswararao Jujjuri (JV) p9_client_clunk(ofid); 7475643135aSVenkateswararao Jujjuri (JV) 7485643135aSVenkateswararao Jujjuri (JV) return 0; 7495643135aSVenkateswararao Jujjuri (JV) 7505643135aSVenkateswararao Jujjuri (JV) error: 7515643135aSVenkateswararao Jujjuri (JV) if (ofid) 7525643135aSVenkateswararao Jujjuri (JV) p9_client_clunk(ofid); 7535643135aSVenkateswararao Jujjuri (JV) if (fid) 7545643135aSVenkateswararao Jujjuri (JV) p9_client_clunk(fid); 7555643135aSVenkateswararao Jujjuri (JV) return err; 7565643135aSVenkateswararao Jujjuri (JV) } 7575643135aSVenkateswararao Jujjuri (JV) 7585643135aSVenkateswararao Jujjuri (JV) /** 7592bad8471SEric Van Hensbergen * v9fs_vfs_create - VFS hook to create files 760ee443996SEric Van Hensbergen * @dir: directory inode that is being created 7612bad8471SEric Van Hensbergen * @dentry: dentry that is being deleted 7626a3124a3SLatchesar Ionkov * @mode: create permissions 7632bad8471SEric Van Hensbergen * @nd: path information 7642bad8471SEric Van Hensbergen * 7652bad8471SEric Van Hensbergen */ 7662bad8471SEric Van Hensbergen 7672bad8471SEric Van Hensbergen static int 7686a3124a3SLatchesar Ionkov v9fs_vfs_create(struct inode *dir, struct dentry *dentry, int mode, 7692bad8471SEric Van Hensbergen struct nameidata *nd) 7702bad8471SEric Van Hensbergen { 7716a3124a3SLatchesar Ionkov int err; 772bd238fb4SLatchesar Ionkov u32 perm; 7736a3124a3SLatchesar Ionkov int flags; 7746a3124a3SLatchesar Ionkov struct v9fs_session_info *v9ses; 775bd238fb4SLatchesar Ionkov struct p9_fid *fid; 7766a3124a3SLatchesar Ionkov struct file *filp; 7776a3124a3SLatchesar Ionkov 778bd238fb4SLatchesar Ionkov err = 0; 779bd238fb4SLatchesar Ionkov fid = NULL; 7806a3124a3SLatchesar Ionkov v9ses = v9fs_inode2v9ses(dir); 781da977b2cSEric Van Hensbergen perm = unixmode2p9mode(v9ses, mode); 7826a3124a3SLatchesar Ionkov if (nd && nd->flags & LOOKUP_OPEN) 7836a3124a3SLatchesar Ionkov flags = nd->intent.open.flags - 1; 7846a3124a3SLatchesar Ionkov else 7856a3124a3SLatchesar Ionkov flags = O_RDWR; 7866a3124a3SLatchesar Ionkov 787bd238fb4SLatchesar Ionkov fid = v9fs_create(v9ses, dir, dentry, NULL, perm, 788dd6102fbSSripathi Kodi v9fs_uflags2omode(flags, 789dd6102fbSSripathi Kodi v9fs_proto_dotu(v9ses))); 790bd238fb4SLatchesar Ionkov if (IS_ERR(fid)) { 791bd238fb4SLatchesar Ionkov err = PTR_ERR(fid); 792bd238fb4SLatchesar Ionkov fid = NULL; 7936a3124a3SLatchesar Ionkov goto error; 7946a3124a3SLatchesar Ionkov } 7956a3124a3SLatchesar Ionkov 796bd238fb4SLatchesar Ionkov /* if we are opening a file, assign the open fid to the file */ 7976a3124a3SLatchesar Ionkov if (nd && nd->flags & LOOKUP_OPEN) { 7986a3124a3SLatchesar Ionkov filp = lookup_instantiate_filp(nd, dentry, v9fs_open_created); 7996a3124a3SLatchesar Ionkov if (IS_ERR(filp)) { 800bd238fb4SLatchesar Ionkov err = PTR_ERR(filp); 801bd238fb4SLatchesar Ionkov goto error; 8026a3124a3SLatchesar Ionkov } 8036a3124a3SLatchesar Ionkov 804bd238fb4SLatchesar Ionkov filp->private_data = fid; 805bd238fb4SLatchesar Ionkov } else 806bd238fb4SLatchesar Ionkov p9_client_clunk(fid); 8076a3124a3SLatchesar Ionkov 8086a3124a3SLatchesar Ionkov return 0; 8096a3124a3SLatchesar Ionkov 8106a3124a3SLatchesar Ionkov error: 811bd238fb4SLatchesar Ionkov if (fid) 812bd238fb4SLatchesar Ionkov p9_client_clunk(fid); 8136a3124a3SLatchesar Ionkov 8146a3124a3SLatchesar Ionkov return err; 8152bad8471SEric Van Hensbergen } 8162bad8471SEric Van Hensbergen 8172bad8471SEric Van Hensbergen /** 8182bad8471SEric Van Hensbergen * v9fs_vfs_mkdir - VFS mkdir hook to create a directory 819ee443996SEric Van Hensbergen * @dir: inode that is being unlinked 8202bad8471SEric Van Hensbergen * @dentry: dentry that is being unlinked 8212bad8471SEric Van Hensbergen * @mode: mode for new directory 8222bad8471SEric Van Hensbergen * 8232bad8471SEric Van Hensbergen */ 8242bad8471SEric Van Hensbergen 8256a3124a3SLatchesar Ionkov static int v9fs_vfs_mkdir(struct inode *dir, struct dentry *dentry, int mode) 8262bad8471SEric Van Hensbergen { 8276a3124a3SLatchesar Ionkov int err; 828bd238fb4SLatchesar Ionkov u32 perm; 8296a3124a3SLatchesar Ionkov struct v9fs_session_info *v9ses; 830bd238fb4SLatchesar Ionkov struct p9_fid *fid; 8316a3124a3SLatchesar Ionkov 832bd238fb4SLatchesar Ionkov P9_DPRINTK(P9_DEBUG_VFS, "name %s\n", dentry->d_name.name); 833bd238fb4SLatchesar Ionkov err = 0; 8346a3124a3SLatchesar Ionkov v9ses = v9fs_inode2v9ses(dir); 8356a3124a3SLatchesar Ionkov perm = unixmode2p9mode(v9ses, mode | S_IFDIR); 836bd238fb4SLatchesar Ionkov fid = v9fs_create(v9ses, dir, dentry, NULL, perm, P9_OREAD); 837bd238fb4SLatchesar Ionkov if (IS_ERR(fid)) { 838bd238fb4SLatchesar Ionkov err = PTR_ERR(fid); 839bd238fb4SLatchesar Ionkov fid = NULL; 8406a3124a3SLatchesar Ionkov } 8416a3124a3SLatchesar Ionkov 842bd238fb4SLatchesar Ionkov if (fid) 843bd238fb4SLatchesar Ionkov p9_client_clunk(fid); 8446a3124a3SLatchesar Ionkov 8456a3124a3SLatchesar Ionkov return err; 8462bad8471SEric Van Hensbergen } 8472bad8471SEric Van Hensbergen 84801a622bdSM. Mohan Kumar 84901a622bdSM. Mohan Kumar /** 85001a622bdSM. Mohan Kumar * v9fs_vfs_mkdir_dotl - VFS mkdir hook to create a directory 85101a622bdSM. Mohan Kumar * @dir: inode that is being unlinked 85201a622bdSM. Mohan Kumar * @dentry: dentry that is being unlinked 85301a622bdSM. Mohan Kumar * @mode: mode for new directory 85401a622bdSM. Mohan Kumar * 85501a622bdSM. Mohan Kumar */ 85601a622bdSM. Mohan Kumar 85701a622bdSM. Mohan Kumar static int v9fs_vfs_mkdir_dotl(struct inode *dir, struct dentry *dentry, 85801a622bdSM. Mohan Kumar int mode) 85901a622bdSM. Mohan Kumar { 86001a622bdSM. Mohan Kumar int err; 86101a622bdSM. Mohan Kumar struct v9fs_session_info *v9ses; 86201a622bdSM. Mohan Kumar struct p9_fid *fid = NULL, *dfid = NULL; 86301a622bdSM. Mohan Kumar gid_t gid; 86401a622bdSM. Mohan Kumar char *name; 86501a622bdSM. Mohan Kumar struct inode *inode; 86601a622bdSM. Mohan Kumar struct p9_qid qid; 86701a622bdSM. Mohan Kumar struct dentry *dir_dentry; 86801a622bdSM. Mohan Kumar 86901a622bdSM. Mohan Kumar P9_DPRINTK(P9_DEBUG_VFS, "name %s\n", dentry->d_name.name); 87001a622bdSM. Mohan Kumar err = 0; 87101a622bdSM. Mohan Kumar v9ses = v9fs_inode2v9ses(dir); 87201a622bdSM. Mohan Kumar 87301a622bdSM. Mohan Kumar mode |= S_IFDIR; 87401a622bdSM. Mohan Kumar dir_dentry = v9fs_dentry_from_dir_inode(dir); 87501a622bdSM. Mohan Kumar dfid = v9fs_fid_lookup(dir_dentry); 87601a622bdSM. Mohan Kumar if (IS_ERR(dfid)) { 87701a622bdSM. Mohan Kumar err = PTR_ERR(dfid); 87801a622bdSM. Mohan Kumar P9_DPRINTK(P9_DEBUG_VFS, "fid lookup failed %d\n", err); 87901a622bdSM. Mohan Kumar dfid = NULL; 88001a622bdSM. Mohan Kumar goto error; 88101a622bdSM. Mohan Kumar } 88201a622bdSM. Mohan Kumar 88301a622bdSM. Mohan Kumar gid = v9fs_get_fsgid_for_create(dir); 88401a622bdSM. Mohan Kumar if (gid < 0) { 88501a622bdSM. Mohan Kumar P9_DPRINTK(P9_DEBUG_VFS, "v9fs_get_fsgid_for_create failed\n"); 88601a622bdSM. Mohan Kumar goto error; 88701a622bdSM. Mohan Kumar } 88801a622bdSM. Mohan Kumar 88901a622bdSM. Mohan Kumar name = (char *) dentry->d_name.name; 89001a622bdSM. Mohan Kumar err = p9_client_mkdir_dotl(dfid, name, mode, gid, &qid); 89101a622bdSM. Mohan Kumar if (err < 0) 89201a622bdSM. Mohan Kumar goto error; 89301a622bdSM. Mohan Kumar 89401a622bdSM. Mohan Kumar /* instantiate inode and assign the unopened fid to the dentry */ 89501a622bdSM. Mohan Kumar if (v9ses->cache == CACHE_LOOSE || v9ses->cache == CACHE_FSCACHE) { 89601a622bdSM. Mohan Kumar fid = p9_client_walk(dfid, 1, &name, 1); 89701a622bdSM. Mohan Kumar if (IS_ERR(fid)) { 89801a622bdSM. Mohan Kumar err = PTR_ERR(fid); 89901a622bdSM. Mohan Kumar P9_DPRINTK(P9_DEBUG_VFS, "p9_client_walk failed %d\n", 90001a622bdSM. Mohan Kumar err); 90101a622bdSM. Mohan Kumar fid = NULL; 90201a622bdSM. Mohan Kumar goto error; 90301a622bdSM. Mohan Kumar } 90401a622bdSM. Mohan Kumar 90501a622bdSM. Mohan Kumar inode = v9fs_inode_from_fid(v9ses, fid, dir->i_sb); 90601a622bdSM. Mohan Kumar if (IS_ERR(inode)) { 90701a622bdSM. Mohan Kumar err = PTR_ERR(inode); 90801a622bdSM. Mohan Kumar P9_DPRINTK(P9_DEBUG_VFS, "inode creation failed %d\n", 90901a622bdSM. Mohan Kumar err); 91001a622bdSM. Mohan Kumar goto error; 91101a622bdSM. Mohan Kumar } 91201a622bdSM. Mohan Kumar dentry->d_op = &v9fs_cached_dentry_operations; 91301a622bdSM. Mohan Kumar d_instantiate(dentry, inode); 91401a622bdSM. Mohan Kumar err = v9fs_fid_add(dentry, fid); 91501a622bdSM. Mohan Kumar if (err < 0) 91601a622bdSM. Mohan Kumar goto error; 91701a622bdSM. Mohan Kumar fid = NULL; 91801a622bdSM. Mohan Kumar } 91901a622bdSM. Mohan Kumar error: 92001a622bdSM. Mohan Kumar if (fid) 92101a622bdSM. Mohan Kumar p9_client_clunk(fid); 92201a622bdSM. Mohan Kumar return err; 92301a622bdSM. Mohan Kumar } 92401a622bdSM. Mohan Kumar 9252bad8471SEric Van Hensbergen /** 9262bad8471SEric Van Hensbergen * v9fs_vfs_lookup - VFS lookup hook to "walk" to a new inode 9272bad8471SEric Van Hensbergen * @dir: inode that is being walked from 9282bad8471SEric Van Hensbergen * @dentry: dentry that is being walked to? 9292bad8471SEric Van Hensbergen * @nameidata: path data 9302bad8471SEric Van Hensbergen * 9312bad8471SEric Van Hensbergen */ 9322bad8471SEric Van Hensbergen 9332bad8471SEric Van Hensbergen static struct dentry *v9fs_vfs_lookup(struct inode *dir, struct dentry *dentry, 9342bad8471SEric Van Hensbergen struct nameidata *nameidata) 9352bad8471SEric Van Hensbergen { 9362bad8471SEric Van Hensbergen struct super_block *sb; 9372bad8471SEric Van Hensbergen struct v9fs_session_info *v9ses; 938bd238fb4SLatchesar Ionkov struct p9_fid *dfid, *fid; 9392bad8471SEric Van Hensbergen struct inode *inode; 940bd238fb4SLatchesar Ionkov char *name; 9412bad8471SEric Van Hensbergen int result = 0; 9422bad8471SEric Van Hensbergen 943bd238fb4SLatchesar Ionkov P9_DPRINTK(P9_DEBUG_VFS, "dir: %p dentry: (%s) %p nameidata: %p\n", 944731805b4SLatchesar Ionkov dir, dentry->d_name.name, dentry, nameidata); 9452bad8471SEric Van Hensbergen 94611e9b49bSSripathi Kodi if (dentry->d_name.len > NAME_MAX) 94711e9b49bSSripathi Kodi return ERR_PTR(-ENAMETOOLONG); 94811e9b49bSSripathi Kodi 9492bad8471SEric Van Hensbergen sb = dir->i_sb; 9502bad8471SEric Van Hensbergen v9ses = v9fs_inode2v9ses(dir); 951bd238fb4SLatchesar Ionkov dfid = v9fs_fid_lookup(dentry->d_parent); 952bd238fb4SLatchesar Ionkov if (IS_ERR(dfid)) 953e231c2eeSDavid Howells return ERR_CAST(dfid); 9542bad8471SEric Van Hensbergen 955bd238fb4SLatchesar Ionkov name = (char *) dentry->d_name.name; 956bd238fb4SLatchesar Ionkov fid = p9_client_walk(dfid, 1, &name, 1); 957bd238fb4SLatchesar Ionkov if (IS_ERR(fid)) { 958bd238fb4SLatchesar Ionkov result = PTR_ERR(fid); 9592bad8471SEric Van Hensbergen if (result == -ENOENT) { 96085e0df24SAneesh Kumar K.V inode = NULL; 96185e0df24SAneesh Kumar K.V goto inst_out; 9622bad8471SEric Van Hensbergen } 9632bad8471SEric Van Hensbergen 964bd238fb4SLatchesar Ionkov return ERR_PTR(result); 9652bad8471SEric Van Hensbergen } 9662bad8471SEric Van Hensbergen 967bd238fb4SLatchesar Ionkov inode = v9fs_inode_from_fid(v9ses, fid, dir->i_sb); 968bd238fb4SLatchesar Ionkov if (IS_ERR(inode)) { 969bd238fb4SLatchesar Ionkov result = PTR_ERR(inode); 970bd238fb4SLatchesar Ionkov inode = NULL; 971bd238fb4SLatchesar Ionkov goto error; 9722bad8471SEric Van Hensbergen } 9732bad8471SEric Van Hensbergen 974bd238fb4SLatchesar Ionkov result = v9fs_fid_add(dentry, fid); 9756a3124a3SLatchesar Ionkov if (result < 0) 976bd238fb4SLatchesar Ionkov goto error; 9776a3124a3SLatchesar Ionkov 97885e0df24SAneesh Kumar K.V inst_out: 97985e0df24SAneesh Kumar K.V if (v9ses->cache) 980e03abc0cSEric Van Hensbergen dentry->d_op = &v9fs_cached_dentry_operations; 981e03abc0cSEric Van Hensbergen else 982e03abc0cSEric Van Hensbergen dentry->d_op = &v9fs_dentry_operations; 9832bad8471SEric Van Hensbergen 9842bad8471SEric Van Hensbergen d_add(dentry, inode); 9852bad8471SEric Van Hensbergen return NULL; 9862bad8471SEric Van Hensbergen 987bd238fb4SLatchesar Ionkov error: 988bd238fb4SLatchesar Ionkov p9_client_clunk(fid); 989da977b2cSEric Van Hensbergen 9902bad8471SEric Van Hensbergen return ERR_PTR(result); 9912bad8471SEric Van Hensbergen } 9922bad8471SEric Van Hensbergen 9932bad8471SEric Van Hensbergen /** 9942bad8471SEric Van Hensbergen * v9fs_vfs_unlink - VFS unlink hook to delete an inode 9952bad8471SEric Van Hensbergen * @i: inode that is being unlinked 99673c592b9SEric Van Hensbergen * @d: dentry that is being unlinked 9972bad8471SEric Van Hensbergen * 9982bad8471SEric Van Hensbergen */ 9992bad8471SEric Van Hensbergen 10002bad8471SEric Van Hensbergen static int v9fs_vfs_unlink(struct inode *i, struct dentry *d) 10012bad8471SEric Van Hensbergen { 10022bad8471SEric Van Hensbergen return v9fs_remove(i, d, 0); 10032bad8471SEric Van Hensbergen } 10042bad8471SEric Van Hensbergen 10052bad8471SEric Van Hensbergen /** 10062bad8471SEric Van Hensbergen * v9fs_vfs_rmdir - VFS unlink hook to delete a directory 10072bad8471SEric Van Hensbergen * @i: inode that is being unlinked 100873c592b9SEric Van Hensbergen * @d: dentry that is being unlinked 10092bad8471SEric Van Hensbergen * 10102bad8471SEric Van Hensbergen */ 10112bad8471SEric Van Hensbergen 10122bad8471SEric Van Hensbergen static int v9fs_vfs_rmdir(struct inode *i, struct dentry *d) 10132bad8471SEric Van Hensbergen { 10142bad8471SEric Van Hensbergen return v9fs_remove(i, d, 1); 10152bad8471SEric Van Hensbergen } 10162bad8471SEric Van Hensbergen 10172bad8471SEric Van Hensbergen /** 10182bad8471SEric Van Hensbergen * v9fs_vfs_rename - VFS hook to rename an inode 10192bad8471SEric Van Hensbergen * @old_dir: old dir inode 10202bad8471SEric Van Hensbergen * @old_dentry: old dentry 10212bad8471SEric Van Hensbergen * @new_dir: new dir inode 10222bad8471SEric Van Hensbergen * @new_dentry: new dentry 10232bad8471SEric Van Hensbergen * 10242bad8471SEric Van Hensbergen */ 10252bad8471SEric Van Hensbergen 10262bad8471SEric Van Hensbergen static int 10272bad8471SEric Van Hensbergen v9fs_vfs_rename(struct inode *old_dir, struct dentry *old_dentry, 10282bad8471SEric Van Hensbergen struct inode *new_dir, struct dentry *new_dentry) 10292bad8471SEric Van Hensbergen { 1030bd238fb4SLatchesar Ionkov struct inode *old_inode; 1031bd238fb4SLatchesar Ionkov struct v9fs_session_info *v9ses; 1032bd238fb4SLatchesar Ionkov struct p9_fid *oldfid; 1033bd238fb4SLatchesar Ionkov struct p9_fid *olddirfid; 1034bd238fb4SLatchesar Ionkov struct p9_fid *newdirfid; 1035bd238fb4SLatchesar Ionkov struct p9_wstat wstat; 1036bd238fb4SLatchesar Ionkov int retval; 10372bad8471SEric Van Hensbergen 1038bd238fb4SLatchesar Ionkov P9_DPRINTK(P9_DEBUG_VFS, "\n"); 1039bd238fb4SLatchesar Ionkov retval = 0; 1040bd238fb4SLatchesar Ionkov old_inode = old_dentry->d_inode; 1041bd238fb4SLatchesar Ionkov v9ses = v9fs_inode2v9ses(old_inode); 1042bd238fb4SLatchesar Ionkov oldfid = v9fs_fid_lookup(old_dentry); 1043da977b2cSEric Van Hensbergen if (IS_ERR(oldfid)) 1044da977b2cSEric Van Hensbergen return PTR_ERR(oldfid); 1045da977b2cSEric Van Hensbergen 1046da977b2cSEric Van Hensbergen olddirfid = v9fs_fid_clone(old_dentry->d_parent); 1047da977b2cSEric Van Hensbergen if (IS_ERR(olddirfid)) { 1048da977b2cSEric Van Hensbergen retval = PTR_ERR(olddirfid); 1049bd238fb4SLatchesar Ionkov goto done; 1050da977b2cSEric Van Hensbergen } 1051da977b2cSEric Van Hensbergen 1052da977b2cSEric Van Hensbergen newdirfid = v9fs_fid_clone(new_dentry->d_parent); 1053da977b2cSEric Van Hensbergen if (IS_ERR(newdirfid)) { 1054da977b2cSEric Van Hensbergen retval = PTR_ERR(newdirfid); 1055bd238fb4SLatchesar Ionkov goto clunk_olddir; 10562bad8471SEric Van Hensbergen } 10572bad8471SEric Van Hensbergen 10584681dbdaSSripathi Kodi if (v9fs_proto_dotl(v9ses)) { 10594681dbdaSSripathi Kodi retval = p9_client_rename(oldfid, newdirfid, 10604681dbdaSSripathi Kodi (char *) new_dentry->d_name.name); 10614681dbdaSSripathi Kodi if (retval != -ENOSYS) 10624681dbdaSSripathi Kodi goto clunk_newdir; 10634681dbdaSSripathi Kodi } 10644681dbdaSSripathi Kodi 10652bad8471SEric Van Hensbergen /* 9P can only handle file rename in the same directory */ 10662bad8471SEric Van Hensbergen if (memcmp(&olddirfid->qid, &newdirfid->qid, sizeof(newdirfid->qid))) { 1067bd238fb4SLatchesar Ionkov P9_DPRINTK(P9_DEBUG_ERROR, 1068bd238fb4SLatchesar Ionkov "old dir and new dir are different\n"); 1069621997cdSEric Van Hensbergen retval = -EXDEV; 1070bd238fb4SLatchesar Ionkov goto clunk_newdir; 10712bad8471SEric Van Hensbergen } 10722bad8471SEric Van Hensbergen 1073531b1094SLatchesar Ionkov v9fs_blank_wstat(&wstat); 1074ba17674fSLatchesar Ionkov wstat.muid = v9ses->uname; 1075531b1094SLatchesar Ionkov wstat.name = (char *) new_dentry->d_name.name; 1076bd238fb4SLatchesar Ionkov retval = p9_client_wstat(oldfid, &wstat); 10772bad8471SEric Van Hensbergen 1078bd238fb4SLatchesar Ionkov clunk_newdir: 107922150c4fSLatchesar Ionkov p9_client_clunk(newdirfid); 10802bad8471SEric Van Hensbergen 1081bd238fb4SLatchesar Ionkov clunk_olddir: 108222150c4fSLatchesar Ionkov p9_client_clunk(olddirfid); 10832bad8471SEric Van Hensbergen 1084bd238fb4SLatchesar Ionkov done: 10852bad8471SEric Van Hensbergen return retval; 10862bad8471SEric Van Hensbergen } 10872bad8471SEric Van Hensbergen 10882bad8471SEric Van Hensbergen /** 1089943ffb58SAdrian Bunk * v9fs_vfs_getattr - retrieve file metadata 1090ee443996SEric Van Hensbergen * @mnt: mount information 1091ee443996SEric Van Hensbergen * @dentry: file to get attributes on 1092ee443996SEric Van Hensbergen * @stat: metadata structure to populate 10932bad8471SEric Van Hensbergen * 10942bad8471SEric Van Hensbergen */ 10952bad8471SEric Van Hensbergen 10962bad8471SEric Van Hensbergen static int 10972bad8471SEric Van Hensbergen v9fs_vfs_getattr(struct vfsmount *mnt, struct dentry *dentry, 10982bad8471SEric Van Hensbergen struct kstat *stat) 10992bad8471SEric Van Hensbergen { 1100bd238fb4SLatchesar Ionkov int err; 1101bd238fb4SLatchesar Ionkov struct v9fs_session_info *v9ses; 1102bd238fb4SLatchesar Ionkov struct p9_fid *fid; 110351a87c55SEric Van Hensbergen struct p9_wstat *st; 11042bad8471SEric Van Hensbergen 1105bd238fb4SLatchesar Ionkov P9_DPRINTK(P9_DEBUG_VFS, "dentry: %p\n", dentry); 1106bd238fb4SLatchesar Ionkov err = -EPERM; 1107bd238fb4SLatchesar Ionkov v9ses = v9fs_inode2v9ses(dentry->d_inode); 110860e78d2cSAbhishek Kulkarni if (v9ses->cache == CACHE_LOOSE || v9ses->cache == CACHE_FSCACHE) 11099523a841SEric Van Hensbergen return simple_getattr(mnt, dentry, stat); 11109523a841SEric Van Hensbergen 1111bd238fb4SLatchesar Ionkov fid = v9fs_fid_lookup(dentry); 1112da977b2cSEric Van Hensbergen if (IS_ERR(fid)) 1113da977b2cSEric Van Hensbergen return PTR_ERR(fid); 11142bad8471SEric Van Hensbergen 1115bd238fb4SLatchesar Ionkov st = p9_client_stat(fid); 1116bd238fb4SLatchesar Ionkov if (IS_ERR(st)) 1117bd238fb4SLatchesar Ionkov return PTR_ERR(st); 11182bad8471SEric Van Hensbergen 1119bd238fb4SLatchesar Ionkov v9fs_stat2inode(st, dentry->d_inode, dentry->d_inode->i_sb); 11202bad8471SEric Van Hensbergen generic_fillattr(dentry->d_inode, stat); 11212bad8471SEric Van Hensbergen 1122bd238fb4SLatchesar Ionkov kfree(st); 1123bd238fb4SLatchesar Ionkov return 0; 11242bad8471SEric Van Hensbergen } 11252bad8471SEric Van Hensbergen 1126f0853122SSripathi Kodi static int 1127f0853122SSripathi Kodi v9fs_vfs_getattr_dotl(struct vfsmount *mnt, struct dentry *dentry, 1128f0853122SSripathi Kodi struct kstat *stat) 1129f0853122SSripathi Kodi { 1130f0853122SSripathi Kodi int err; 1131f0853122SSripathi Kodi struct v9fs_session_info *v9ses; 1132f0853122SSripathi Kodi struct p9_fid *fid; 1133f0853122SSripathi Kodi struct p9_stat_dotl *st; 1134f0853122SSripathi Kodi 1135f0853122SSripathi Kodi P9_DPRINTK(P9_DEBUG_VFS, "dentry: %p\n", dentry); 1136f0853122SSripathi Kodi err = -EPERM; 1137f0853122SSripathi Kodi v9ses = v9fs_inode2v9ses(dentry->d_inode); 1138f0853122SSripathi Kodi if (v9ses->cache == CACHE_LOOSE || v9ses->cache == CACHE_FSCACHE) 1139f0853122SSripathi Kodi return simple_getattr(mnt, dentry, stat); 1140f0853122SSripathi Kodi 1141f0853122SSripathi Kodi fid = v9fs_fid_lookup(dentry); 1142f0853122SSripathi Kodi if (IS_ERR(fid)) 1143f0853122SSripathi Kodi return PTR_ERR(fid); 1144f0853122SSripathi Kodi 1145f0853122SSripathi Kodi /* Ask for all the fields in stat structure. Server will return 1146f0853122SSripathi Kodi * whatever it supports 1147f0853122SSripathi Kodi */ 1148f0853122SSripathi Kodi 1149f0853122SSripathi Kodi st = p9_client_getattr_dotl(fid, P9_STATS_ALL); 1150f0853122SSripathi Kodi if (IS_ERR(st)) 1151f0853122SSripathi Kodi return PTR_ERR(st); 1152f0853122SSripathi Kodi 1153f0853122SSripathi Kodi v9fs_stat2inode_dotl(st, dentry->d_inode); 1154f0853122SSripathi Kodi generic_fillattr(dentry->d_inode, stat); 1155f0853122SSripathi Kodi /* Change block size to what the server returned */ 1156f0853122SSripathi Kodi stat->blksize = st->st_blksize; 1157f0853122SSripathi Kodi 1158f0853122SSripathi Kodi kfree(st); 1159f0853122SSripathi Kodi return 0; 1160f0853122SSripathi Kodi } 1161f0853122SSripathi Kodi 11622bad8471SEric Van Hensbergen /** 11632bad8471SEric Van Hensbergen * v9fs_vfs_setattr - set file metadata 11642bad8471SEric Van Hensbergen * @dentry: file whose metadata to set 11652bad8471SEric Van Hensbergen * @iattr: metadata assignment structure 11662bad8471SEric Van Hensbergen * 11672bad8471SEric Van Hensbergen */ 11682bad8471SEric Van Hensbergen 11692bad8471SEric Van Hensbergen static int v9fs_vfs_setattr(struct dentry *dentry, struct iattr *iattr) 11702bad8471SEric Van Hensbergen { 1171bd238fb4SLatchesar Ionkov int retval; 1172bd238fb4SLatchesar Ionkov struct v9fs_session_info *v9ses; 1173bd238fb4SLatchesar Ionkov struct p9_fid *fid; 1174bd238fb4SLatchesar Ionkov struct p9_wstat wstat; 11752bad8471SEric Van Hensbergen 1176bd238fb4SLatchesar Ionkov P9_DPRINTK(P9_DEBUG_VFS, "\n"); 1177bd238fb4SLatchesar Ionkov retval = -EPERM; 1178bd238fb4SLatchesar Ionkov v9ses = v9fs_inode2v9ses(dentry->d_inode); 1179bd238fb4SLatchesar Ionkov fid = v9fs_fid_lookup(dentry); 1180da977b2cSEric Van Hensbergen if(IS_ERR(fid)) 1181da977b2cSEric Van Hensbergen return PTR_ERR(fid); 11822bad8471SEric Van Hensbergen 1183531b1094SLatchesar Ionkov v9fs_blank_wstat(&wstat); 11842bad8471SEric Van Hensbergen if (iattr->ia_valid & ATTR_MODE) 1185531b1094SLatchesar Ionkov wstat.mode = unixmode2p9mode(v9ses, iattr->ia_mode); 11862bad8471SEric Van Hensbergen 11872bad8471SEric Van Hensbergen if (iattr->ia_valid & ATTR_MTIME) 1188531b1094SLatchesar Ionkov wstat.mtime = iattr->ia_mtime.tv_sec; 11892bad8471SEric Van Hensbergen 11902bad8471SEric Van Hensbergen if (iattr->ia_valid & ATTR_ATIME) 1191531b1094SLatchesar Ionkov wstat.atime = iattr->ia_atime.tv_sec; 11922bad8471SEric Van Hensbergen 11932bad8471SEric Van Hensbergen if (iattr->ia_valid & ATTR_SIZE) 1194531b1094SLatchesar Ionkov wstat.length = iattr->ia_size; 11952bad8471SEric Van Hensbergen 1196dd6102fbSSripathi Kodi if (v9fs_proto_dotu(v9ses)) { 1197531b1094SLatchesar Ionkov if (iattr->ia_valid & ATTR_UID) 1198531b1094SLatchesar Ionkov wstat.n_uid = iattr->ia_uid; 11992bad8471SEric Van Hensbergen 1200531b1094SLatchesar Ionkov if (iattr->ia_valid & ATTR_GID) 1201531b1094SLatchesar Ionkov wstat.n_gid = iattr->ia_gid; 12022bad8471SEric Van Hensbergen } 12032bad8471SEric Van Hensbergen 1204bd238fb4SLatchesar Ionkov retval = p9_client_wstat(fid, &wstat); 1205bd238fb4SLatchesar Ionkov if (retval >= 0) 1206bd238fb4SLatchesar Ionkov retval = inode_setattr(dentry->d_inode, iattr); 12072bad8471SEric Van Hensbergen 1208bd238fb4SLatchesar Ionkov return retval; 12092bad8471SEric Van Hensbergen } 12102bad8471SEric Van Hensbergen 12112bad8471SEric Van Hensbergen /** 121287d7845aSSripathi Kodi * v9fs_vfs_setattr_dotl - set file metadata 121387d7845aSSripathi Kodi * @dentry: file whose metadata to set 121487d7845aSSripathi Kodi * @iattr: metadata assignment structure 121587d7845aSSripathi Kodi * 121687d7845aSSripathi Kodi */ 121787d7845aSSripathi Kodi 121887d7845aSSripathi Kodi static int v9fs_vfs_setattr_dotl(struct dentry *dentry, struct iattr *iattr) 121987d7845aSSripathi Kodi { 122087d7845aSSripathi Kodi int retval; 122187d7845aSSripathi Kodi struct v9fs_session_info *v9ses; 122287d7845aSSripathi Kodi struct p9_fid *fid; 122387d7845aSSripathi Kodi struct p9_iattr_dotl p9attr; 122487d7845aSSripathi Kodi 122587d7845aSSripathi Kodi P9_DPRINTK(P9_DEBUG_VFS, "\n"); 122687d7845aSSripathi Kodi 122787d7845aSSripathi Kodi retval = inode_change_ok(dentry->d_inode, iattr); 122887d7845aSSripathi Kodi if (retval) 122987d7845aSSripathi Kodi return retval; 123087d7845aSSripathi Kodi 123187d7845aSSripathi Kodi p9attr.valid = iattr->ia_valid; 123287d7845aSSripathi Kodi p9attr.mode = iattr->ia_mode; 123387d7845aSSripathi Kodi p9attr.uid = iattr->ia_uid; 123487d7845aSSripathi Kodi p9attr.gid = iattr->ia_gid; 123587d7845aSSripathi Kodi p9attr.size = iattr->ia_size; 123687d7845aSSripathi Kodi p9attr.atime_sec = iattr->ia_atime.tv_sec; 123787d7845aSSripathi Kodi p9attr.atime_nsec = iattr->ia_atime.tv_nsec; 123887d7845aSSripathi Kodi p9attr.mtime_sec = iattr->ia_mtime.tv_sec; 123987d7845aSSripathi Kodi p9attr.mtime_nsec = iattr->ia_mtime.tv_nsec; 124087d7845aSSripathi Kodi 124187d7845aSSripathi Kodi retval = -EPERM; 124287d7845aSSripathi Kodi v9ses = v9fs_inode2v9ses(dentry->d_inode); 124387d7845aSSripathi Kodi fid = v9fs_fid_lookup(dentry); 124487d7845aSSripathi Kodi if (IS_ERR(fid)) 124587d7845aSSripathi Kodi return PTR_ERR(fid); 124687d7845aSSripathi Kodi 124787d7845aSSripathi Kodi retval = p9_client_setattr(fid, &p9attr); 124887d7845aSSripathi Kodi if (retval >= 0) 124987d7845aSSripathi Kodi retval = inode_setattr(dentry->d_inode, iattr); 125087d7845aSSripathi Kodi 125187d7845aSSripathi Kodi return retval; 125287d7845aSSripathi Kodi } 125387d7845aSSripathi Kodi 125487d7845aSSripathi Kodi /** 1255531b1094SLatchesar Ionkov * v9fs_stat2inode - populate an inode structure with mistat info 1256531b1094SLatchesar Ionkov * @stat: Plan 9 metadata (mistat) structure 12572bad8471SEric Van Hensbergen * @inode: inode to populate 12582bad8471SEric Van Hensbergen * @sb: superblock of filesystem 12592bad8471SEric Van Hensbergen * 12602bad8471SEric Van Hensbergen */ 12612bad8471SEric Van Hensbergen 12622bad8471SEric Van Hensbergen void 126351a87c55SEric Van Hensbergen v9fs_stat2inode(struct p9_wstat *stat, struct inode *inode, 12642bad8471SEric Van Hensbergen struct super_block *sb) 12652bad8471SEric Van Hensbergen { 1266531b1094SLatchesar Ionkov char ext[32]; 12675717144aSAneesh Kumar K.V char tag_name[14]; 12685717144aSAneesh Kumar K.V unsigned int i_nlink; 12692bad8471SEric Van Hensbergen struct v9fs_session_info *v9ses = sb->s_fs_info; 12702bad8471SEric Van Hensbergen 12712bad8471SEric Van Hensbergen inode->i_nlink = 1; 12722bad8471SEric Van Hensbergen 1273531b1094SLatchesar Ionkov inode->i_atime.tv_sec = stat->atime; 1274531b1094SLatchesar Ionkov inode->i_mtime.tv_sec = stat->mtime; 1275531b1094SLatchesar Ionkov inode->i_ctime.tv_sec = stat->mtime; 12762bad8471SEric Van Hensbergen 1277bd32b82dSLatchesar Ionkov inode->i_uid = v9ses->dfltuid; 1278bd32b82dSLatchesar Ionkov inode->i_gid = v9ses->dfltgid; 12792bad8471SEric Van Hensbergen 1280dd6102fbSSripathi Kodi if (v9fs_proto_dotu(v9ses)) { 1281531b1094SLatchesar Ionkov inode->i_uid = stat->n_uid; 1282531b1094SLatchesar Ionkov inode->i_gid = stat->n_gid; 1283531b1094SLatchesar Ionkov } 12845717144aSAneesh Kumar K.V if ((S_ISREG(inode->i_mode)) || (S_ISDIR(inode->i_mode))) { 12855717144aSAneesh Kumar K.V if (v9fs_proto_dotu(v9ses) && (stat->extension[0] != '\0')) { 12865717144aSAneesh Kumar K.V /* 12875717144aSAneesh Kumar K.V * Hadlink support got added later to 12885717144aSAneesh Kumar K.V * to the .u extension. So there can be 12895717144aSAneesh Kumar K.V * server out there that doesn't support 12905717144aSAneesh Kumar K.V * this even with .u extension. So check 12915717144aSAneesh Kumar K.V * for non NULL stat->extension 12925717144aSAneesh Kumar K.V */ 12935717144aSAneesh Kumar K.V strncpy(ext, stat->extension, sizeof(ext)); 12945717144aSAneesh Kumar K.V /* HARDLINKCOUNT %u */ 12955717144aSAneesh Kumar K.V sscanf(ext, "%13s %u", tag_name, &i_nlink); 12965717144aSAneesh Kumar K.V if (!strncmp(tag_name, "HARDLINKCOUNT", 13)) 12975717144aSAneesh Kumar K.V inode->i_nlink = i_nlink; 12985717144aSAneesh Kumar K.V } 12995717144aSAneesh Kumar K.V } 1300531b1094SLatchesar Ionkov inode->i_mode = p9mode2unixmode(v9ses, stat->mode); 13012bad8471SEric Van Hensbergen if ((S_ISBLK(inode->i_mode)) || (S_ISCHR(inode->i_mode))) { 13022bad8471SEric Van Hensbergen char type = 0; 13032bad8471SEric Van Hensbergen int major = -1; 13042bad8471SEric Van Hensbergen int minor = -1; 1305531b1094SLatchesar Ionkov 130651a87c55SEric Van Hensbergen strncpy(ext, stat->extension, sizeof(ext)); 1307531b1094SLatchesar Ionkov sscanf(ext, "%c %u %u", &type, &major, &minor); 13082bad8471SEric Van Hensbergen switch (type) { 13092bad8471SEric Van Hensbergen case 'c': 13102bad8471SEric Van Hensbergen inode->i_mode &= ~S_IFBLK; 13112bad8471SEric Van Hensbergen inode->i_mode |= S_IFCHR; 13122bad8471SEric Van Hensbergen break; 13132bad8471SEric Van Hensbergen case 'b': 13142bad8471SEric Van Hensbergen break; 13152bad8471SEric Van Hensbergen default: 1316bd238fb4SLatchesar Ionkov P9_DPRINTK(P9_DEBUG_ERROR, 131751a87c55SEric Van Hensbergen "Unknown special type %c %s\n", type, 131851a87c55SEric Van Hensbergen stat->extension); 13192bad8471SEric Van Hensbergen }; 13202bad8471SEric Van Hensbergen inode->i_rdev = MKDEV(major, minor); 132157c7b4e6SMagnus Deininger init_special_inode(inode, inode->i_mode, inode->i_rdev); 13222bad8471SEric Van Hensbergen } else 13232bad8471SEric Van Hensbergen inode->i_rdev = 0; 13242bad8471SEric Van Hensbergen 13257549ae3eSAbhishek Kulkarni i_size_write(inode, stat->length); 13262bad8471SEric Van Hensbergen 1327bd238fb4SLatchesar Ionkov /* not real number of blocks, but 512 byte ones ... */ 13287549ae3eSAbhishek Kulkarni inode->i_blocks = (i_size_read(inode) + 512 - 1) >> 9; 13292bad8471SEric Van Hensbergen } 13302bad8471SEric Van Hensbergen 13312bad8471SEric Van Hensbergen /** 1332f0853122SSripathi Kodi * v9fs_stat2inode_dotl - populate an inode structure with stat info 1333f0853122SSripathi Kodi * @stat: stat structure 1334f0853122SSripathi Kodi * @inode: inode to populate 1335f0853122SSripathi Kodi * @sb: superblock of filesystem 1336f0853122SSripathi Kodi * 1337f0853122SSripathi Kodi */ 1338f0853122SSripathi Kodi 1339f0853122SSripathi Kodi void 1340f0853122SSripathi Kodi v9fs_stat2inode_dotl(struct p9_stat_dotl *stat, struct inode *inode) 1341f0853122SSripathi Kodi { 1342f0853122SSripathi Kodi 1343f0853122SSripathi Kodi if ((stat->st_result_mask & P9_STATS_BASIC) == P9_STATS_BASIC) { 1344f0853122SSripathi Kodi inode->i_atime.tv_sec = stat->st_atime_sec; 1345f0853122SSripathi Kodi inode->i_atime.tv_nsec = stat->st_atime_nsec; 1346f0853122SSripathi Kodi inode->i_mtime.tv_sec = stat->st_mtime_sec; 1347f0853122SSripathi Kodi inode->i_mtime.tv_nsec = stat->st_mtime_nsec; 1348f0853122SSripathi Kodi inode->i_ctime.tv_sec = stat->st_ctime_sec; 1349f0853122SSripathi Kodi inode->i_ctime.tv_nsec = stat->st_ctime_nsec; 1350f0853122SSripathi Kodi inode->i_uid = stat->st_uid; 1351f0853122SSripathi Kodi inode->i_gid = stat->st_gid; 1352f0853122SSripathi Kodi inode->i_nlink = stat->st_nlink; 1353f0853122SSripathi Kodi inode->i_mode = stat->st_mode; 1354f0853122SSripathi Kodi inode->i_rdev = new_decode_dev(stat->st_rdev); 1355f0853122SSripathi Kodi 1356f0853122SSripathi Kodi if ((S_ISBLK(inode->i_mode)) || (S_ISCHR(inode->i_mode))) 1357f0853122SSripathi Kodi init_special_inode(inode, inode->i_mode, inode->i_rdev); 1358f0853122SSripathi Kodi 1359f0853122SSripathi Kodi i_size_write(inode, stat->st_size); 1360f0853122SSripathi Kodi inode->i_blocks = stat->st_blocks; 1361f0853122SSripathi Kodi } else { 1362f0853122SSripathi Kodi if (stat->st_result_mask & P9_STATS_ATIME) { 1363f0853122SSripathi Kodi inode->i_atime.tv_sec = stat->st_atime_sec; 1364f0853122SSripathi Kodi inode->i_atime.tv_nsec = stat->st_atime_nsec; 1365f0853122SSripathi Kodi } 1366f0853122SSripathi Kodi if (stat->st_result_mask & P9_STATS_MTIME) { 1367f0853122SSripathi Kodi inode->i_mtime.tv_sec = stat->st_mtime_sec; 1368f0853122SSripathi Kodi inode->i_mtime.tv_nsec = stat->st_mtime_nsec; 1369f0853122SSripathi Kodi } 1370f0853122SSripathi Kodi if (stat->st_result_mask & P9_STATS_CTIME) { 1371f0853122SSripathi Kodi inode->i_ctime.tv_sec = stat->st_ctime_sec; 1372f0853122SSripathi Kodi inode->i_ctime.tv_nsec = stat->st_ctime_nsec; 1373f0853122SSripathi Kodi } 1374f0853122SSripathi Kodi if (stat->st_result_mask & P9_STATS_UID) 1375f0853122SSripathi Kodi inode->i_uid = stat->st_uid; 1376f0853122SSripathi Kodi if (stat->st_result_mask & P9_STATS_GID) 1377f0853122SSripathi Kodi inode->i_gid = stat->st_gid; 1378f0853122SSripathi Kodi if (stat->st_result_mask & P9_STATS_NLINK) 1379f0853122SSripathi Kodi inode->i_nlink = stat->st_nlink; 1380f0853122SSripathi Kodi if (stat->st_result_mask & P9_STATS_MODE) { 1381f0853122SSripathi Kodi inode->i_mode = stat->st_mode; 1382f0853122SSripathi Kodi if ((S_ISBLK(inode->i_mode)) || 1383f0853122SSripathi Kodi (S_ISCHR(inode->i_mode))) 1384f0853122SSripathi Kodi init_special_inode(inode, inode->i_mode, 1385f0853122SSripathi Kodi inode->i_rdev); 1386f0853122SSripathi Kodi } 1387f0853122SSripathi Kodi if (stat->st_result_mask & P9_STATS_RDEV) 1388f0853122SSripathi Kodi inode->i_rdev = new_decode_dev(stat->st_rdev); 1389f0853122SSripathi Kodi if (stat->st_result_mask & P9_STATS_SIZE) 1390f0853122SSripathi Kodi i_size_write(inode, stat->st_size); 1391f0853122SSripathi Kodi if (stat->st_result_mask & P9_STATS_BLOCKS) 1392f0853122SSripathi Kodi inode->i_blocks = stat->st_blocks; 1393f0853122SSripathi Kodi } 1394f0853122SSripathi Kodi if (stat->st_result_mask & P9_STATS_GEN) 1395f0853122SSripathi Kodi inode->i_generation = stat->st_gen; 1396f0853122SSripathi Kodi 1397f0853122SSripathi Kodi /* Currently we don't support P9_STATS_BTIME and P9_STATS_DATA_VERSION 1398f0853122SSripathi Kodi * because the inode structure does not have fields for them. 1399f0853122SSripathi Kodi */ 1400f0853122SSripathi Kodi } 1401f0853122SSripathi Kodi 1402f0853122SSripathi Kodi /** 14032bad8471SEric Van Hensbergen * v9fs_qid2ino - convert qid into inode number 14042bad8471SEric Van Hensbergen * @qid: qid to hash 14052bad8471SEric Van Hensbergen * 14062bad8471SEric Van Hensbergen * BUG: potential for inode number collisions? 14072bad8471SEric Van Hensbergen */ 14082bad8471SEric Van Hensbergen 1409bd238fb4SLatchesar Ionkov ino_t v9fs_qid2ino(struct p9_qid *qid) 14102bad8471SEric Van Hensbergen { 14112bad8471SEric Van Hensbergen u64 path = qid->path + 2; 14122bad8471SEric Van Hensbergen ino_t i = 0; 14132bad8471SEric Van Hensbergen 14142bad8471SEric Van Hensbergen if (sizeof(ino_t) == sizeof(path)) 14152bad8471SEric Van Hensbergen memcpy(&i, &path, sizeof(ino_t)); 14162bad8471SEric Van Hensbergen else 14172bad8471SEric Van Hensbergen i = (ino_t) (path ^ (path >> 32)); 14182bad8471SEric Van Hensbergen 14192bad8471SEric Van Hensbergen return i; 14202bad8471SEric Van Hensbergen } 14212bad8471SEric Van Hensbergen 14222bad8471SEric Van Hensbergen /** 14232bad8471SEric Van Hensbergen * v9fs_readlink - read a symlink's location (internal version) 14242bad8471SEric Van Hensbergen * @dentry: dentry for symlink 142573c592b9SEric Van Hensbergen * @buffer: buffer to load symlink location into 14262bad8471SEric Van Hensbergen * @buflen: length of buffer 14272bad8471SEric Van Hensbergen * 14282bad8471SEric Van Hensbergen */ 14292bad8471SEric Van Hensbergen 14302bad8471SEric Van Hensbergen static int v9fs_readlink(struct dentry *dentry, char *buffer, int buflen) 14312bad8471SEric Van Hensbergen { 1432bd238fb4SLatchesar Ionkov int retval; 14332bad8471SEric Van Hensbergen 1434bd238fb4SLatchesar Ionkov struct v9fs_session_info *v9ses; 1435bd238fb4SLatchesar Ionkov struct p9_fid *fid; 143651a87c55SEric Van Hensbergen struct p9_wstat *st; 14372bad8471SEric Van Hensbergen 1438bd238fb4SLatchesar Ionkov P9_DPRINTK(P9_DEBUG_VFS, " %s\n", dentry->d_name.name); 1439bd238fb4SLatchesar Ionkov retval = -EPERM; 1440bd238fb4SLatchesar Ionkov v9ses = v9fs_inode2v9ses(dentry->d_inode); 1441bd238fb4SLatchesar Ionkov fid = v9fs_fid_lookup(dentry); 1442da977b2cSEric Van Hensbergen if (IS_ERR(fid)) 1443da977b2cSEric Van Hensbergen return PTR_ERR(fid); 14442bad8471SEric Van Hensbergen 144550cc42ffSVenkateswararao Jujjuri (JV) if (!v9fs_proto_dotu(v9ses) && !v9fs_proto_dotl(v9ses)) 1446bd238fb4SLatchesar Ionkov return -EBADF; 14472bad8471SEric Van Hensbergen 1448bd238fb4SLatchesar Ionkov st = p9_client_stat(fid); 1449bd238fb4SLatchesar Ionkov if (IS_ERR(st)) 1450bd238fb4SLatchesar Ionkov return PTR_ERR(st); 14512bad8471SEric Van Hensbergen 1452bd238fb4SLatchesar Ionkov if (!(st->mode & P9_DMSYMLINK)) { 14532bad8471SEric Van Hensbergen retval = -EINVAL; 1454bd238fb4SLatchesar Ionkov goto done; 14552bad8471SEric Van Hensbergen } 14562bad8471SEric Van Hensbergen 14572bad8471SEric Van Hensbergen /* copy extension buffer into buffer */ 145851a87c55SEric Van Hensbergen strncpy(buffer, st->extension, buflen); 14592bad8471SEric Van Hensbergen 1460bd238fb4SLatchesar Ionkov P9_DPRINTK(P9_DEBUG_VFS, 146151a87c55SEric Van Hensbergen "%s -> %s (%s)\n", dentry->d_name.name, st->extension, buffer); 1462bd238fb4SLatchesar Ionkov 14632511cd0bSMartin Stava retval = strnlen(buffer, buflen); 1464bd238fb4SLatchesar Ionkov done: 1465bd238fb4SLatchesar Ionkov kfree(st); 14662bad8471SEric Van Hensbergen return retval; 14672bad8471SEric Van Hensbergen } 14682bad8471SEric Van Hensbergen 14692bad8471SEric Van Hensbergen /** 14702bad8471SEric Van Hensbergen * v9fs_vfs_follow_link - follow a symlink path 14712bad8471SEric Van Hensbergen * @dentry: dentry for symlink 14722bad8471SEric Van Hensbergen * @nd: nameidata 14732bad8471SEric Van Hensbergen * 14742bad8471SEric Van Hensbergen */ 14752bad8471SEric Van Hensbergen 14762bad8471SEric Van Hensbergen static void *v9fs_vfs_follow_link(struct dentry *dentry, struct nameidata *nd) 14772bad8471SEric Van Hensbergen { 14782bad8471SEric Van Hensbergen int len = 0; 14792bad8471SEric Van Hensbergen char *link = __getname(); 14802bad8471SEric Van Hensbergen 1481bd238fb4SLatchesar Ionkov P9_DPRINTK(P9_DEBUG_VFS, "%s n", dentry->d_name.name); 14822bad8471SEric Van Hensbergen 14832bad8471SEric Van Hensbergen if (!link) 14842bad8471SEric Van Hensbergen link = ERR_PTR(-ENOMEM); 14852bad8471SEric Van Hensbergen else { 148616cce6d2SLatchesar Ionkov len = v9fs_readlink(dentry, link, PATH_MAX); 14872bad8471SEric Van Hensbergen 14882bad8471SEric Van Hensbergen if (len < 0) { 1489ce44eeb6SDavi Arnaut __putname(link); 14902bad8471SEric Van Hensbergen link = ERR_PTR(len); 14912bad8471SEric Van Hensbergen } else 14922511cd0bSMartin Stava link[min(len, PATH_MAX-1)] = 0; 14932bad8471SEric Van Hensbergen } 14942bad8471SEric Van Hensbergen nd_set_link(nd, link); 14952bad8471SEric Van Hensbergen 14962bad8471SEric Van Hensbergen return NULL; 14972bad8471SEric Van Hensbergen } 14982bad8471SEric Van Hensbergen 14992bad8471SEric Van Hensbergen /** 15002bad8471SEric Van Hensbergen * v9fs_vfs_put_link - release a symlink path 15012bad8471SEric Van Hensbergen * @dentry: dentry for symlink 15022bad8471SEric Van Hensbergen * @nd: nameidata 1503ee443996SEric Van Hensbergen * @p: unused 15042bad8471SEric Van Hensbergen * 15052bad8471SEric Van Hensbergen */ 15062bad8471SEric Van Hensbergen 1507ee443996SEric Van Hensbergen static void 1508ee443996SEric Van Hensbergen v9fs_vfs_put_link(struct dentry *dentry, struct nameidata *nd, void *p) 15092bad8471SEric Van Hensbergen { 15102bad8471SEric Van Hensbergen char *s = nd_get_link(nd); 15112bad8471SEric Van Hensbergen 15126ff23207SDuane Griffin P9_DPRINTK(P9_DEBUG_VFS, " %s %s\n", dentry->d_name.name, 15136ff23207SDuane Griffin IS_ERR(s) ? "<error>" : s); 15142bad8471SEric Van Hensbergen if (!IS_ERR(s)) 1515ce44eeb6SDavi Arnaut __putname(s); 15162bad8471SEric Van Hensbergen } 15172bad8471SEric Van Hensbergen 1518ee443996SEric Van Hensbergen /** 1519ee443996SEric Van Hensbergen * v9fs_vfs_mkspecial - create a special file 1520ee443996SEric Van Hensbergen * @dir: inode to create special file in 1521ee443996SEric Van Hensbergen * @dentry: dentry to create 1522ee443996SEric Van Hensbergen * @mode: mode to create special file 1523ee443996SEric Van Hensbergen * @extension: 9p2000.u format extension string representing special file 1524ee443996SEric Van Hensbergen * 1525ee443996SEric Van Hensbergen */ 1526ee443996SEric Van Hensbergen 1527531b1094SLatchesar Ionkov static int v9fs_vfs_mkspecial(struct inode *dir, struct dentry *dentry, 1528531b1094SLatchesar Ionkov int mode, const char *extension) 1529531b1094SLatchesar Ionkov { 1530bd238fb4SLatchesar Ionkov u32 perm; 1531531b1094SLatchesar Ionkov struct v9fs_session_info *v9ses; 1532bd238fb4SLatchesar Ionkov struct p9_fid *fid; 1533531b1094SLatchesar Ionkov 15346a3124a3SLatchesar Ionkov v9ses = v9fs_inode2v9ses(dir); 1535dd6102fbSSripathi Kodi if (!v9fs_proto_dotu(v9ses)) { 1536bd238fb4SLatchesar Ionkov P9_DPRINTK(P9_DEBUG_ERROR, "not extended\n"); 15376a3124a3SLatchesar Ionkov return -EPERM; 1538531b1094SLatchesar Ionkov } 1539531b1094SLatchesar Ionkov 1540da977b2cSEric Van Hensbergen perm = unixmode2p9mode(v9ses, mode); 1541bd238fb4SLatchesar Ionkov fid = v9fs_create(v9ses, dir, dentry, (char *) extension, perm, 1542bd238fb4SLatchesar Ionkov P9_OREAD); 1543bd238fb4SLatchesar Ionkov if (IS_ERR(fid)) 1544bd238fb4SLatchesar Ionkov return PTR_ERR(fid); 1545da977b2cSEric Van Hensbergen 1546bd238fb4SLatchesar Ionkov p9_client_clunk(fid); 15476a3124a3SLatchesar Ionkov return 0; 1548531b1094SLatchesar Ionkov } 1549531b1094SLatchesar Ionkov 1550531b1094SLatchesar Ionkov /** 155150cc42ffSVenkateswararao Jujjuri (JV) * v9fs_vfs_symlink_dotl - helper function to create symlinks 155250cc42ffSVenkateswararao Jujjuri (JV) * @dir: directory inode containing symlink 155350cc42ffSVenkateswararao Jujjuri (JV) * @dentry: dentry for symlink 155450cc42ffSVenkateswararao Jujjuri (JV) * @symname: symlink data 155550cc42ffSVenkateswararao Jujjuri (JV) * 155650cc42ffSVenkateswararao Jujjuri (JV) * See Also: 9P2000.L RFC for more information 155750cc42ffSVenkateswararao Jujjuri (JV) * 155850cc42ffSVenkateswararao Jujjuri (JV) */ 155950cc42ffSVenkateswararao Jujjuri (JV) 156050cc42ffSVenkateswararao Jujjuri (JV) static int 156150cc42ffSVenkateswararao Jujjuri (JV) v9fs_vfs_symlink_dotl(struct inode *dir, struct dentry *dentry, 156250cc42ffSVenkateswararao Jujjuri (JV) const char *symname) 156350cc42ffSVenkateswararao Jujjuri (JV) { 156450cc42ffSVenkateswararao Jujjuri (JV) struct v9fs_session_info *v9ses; 156550cc42ffSVenkateswararao Jujjuri (JV) struct p9_fid *dfid; 156650cc42ffSVenkateswararao Jujjuri (JV) struct p9_fid *fid = NULL; 156750cc42ffSVenkateswararao Jujjuri (JV) struct inode *inode; 156850cc42ffSVenkateswararao Jujjuri (JV) struct p9_qid qid; 156950cc42ffSVenkateswararao Jujjuri (JV) char *name; 157050cc42ffSVenkateswararao Jujjuri (JV) int err; 157150cc42ffSVenkateswararao Jujjuri (JV) gid_t gid; 157250cc42ffSVenkateswararao Jujjuri (JV) 157350cc42ffSVenkateswararao Jujjuri (JV) name = (char *) dentry->d_name.name; 157450cc42ffSVenkateswararao Jujjuri (JV) P9_DPRINTK(P9_DEBUG_VFS, "v9fs_vfs_symlink_dotl : %lu,%s,%s\n", 157550cc42ffSVenkateswararao Jujjuri (JV) dir->i_ino, name, symname); 157650cc42ffSVenkateswararao Jujjuri (JV) v9ses = v9fs_inode2v9ses(dir); 157750cc42ffSVenkateswararao Jujjuri (JV) 157850cc42ffSVenkateswararao Jujjuri (JV) dfid = v9fs_fid_lookup(dentry->d_parent); 157950cc42ffSVenkateswararao Jujjuri (JV) if (IS_ERR(dfid)) { 158050cc42ffSVenkateswararao Jujjuri (JV) err = PTR_ERR(dfid); 158150cc42ffSVenkateswararao Jujjuri (JV) P9_DPRINTK(P9_DEBUG_VFS, "fid lookup failed %d\n", err); 158250cc42ffSVenkateswararao Jujjuri (JV) return err; 158350cc42ffSVenkateswararao Jujjuri (JV) } 158450cc42ffSVenkateswararao Jujjuri (JV) 158550cc42ffSVenkateswararao Jujjuri (JV) gid = v9fs_get_fsgid_for_create(dir); 158650cc42ffSVenkateswararao Jujjuri (JV) 158750cc42ffSVenkateswararao Jujjuri (JV) if (gid < 0) { 158850cc42ffSVenkateswararao Jujjuri (JV) P9_DPRINTK(P9_DEBUG_VFS, "v9fs_get_egid failed %d\n", gid); 158950cc42ffSVenkateswararao Jujjuri (JV) goto error; 159050cc42ffSVenkateswararao Jujjuri (JV) } 159150cc42ffSVenkateswararao Jujjuri (JV) 159250cc42ffSVenkateswararao Jujjuri (JV) /* Server doesn't alter fid on TSYMLINK. Hence no need to clone it. */ 159350cc42ffSVenkateswararao Jujjuri (JV) err = p9_client_symlink(dfid, name, (char *)symname, gid, &qid); 159450cc42ffSVenkateswararao Jujjuri (JV) 159550cc42ffSVenkateswararao Jujjuri (JV) if (err < 0) { 159650cc42ffSVenkateswararao Jujjuri (JV) P9_DPRINTK(P9_DEBUG_VFS, "p9_client_symlink failed %d\n", err); 159750cc42ffSVenkateswararao Jujjuri (JV) goto error; 159850cc42ffSVenkateswararao Jujjuri (JV) } 159950cc42ffSVenkateswararao Jujjuri (JV) 160050cc42ffSVenkateswararao Jujjuri (JV) if (v9ses->cache) { 160150cc42ffSVenkateswararao Jujjuri (JV) /* Now walk from the parent so we can get an unopened fid. */ 160250cc42ffSVenkateswararao Jujjuri (JV) fid = p9_client_walk(dfid, 1, &name, 1); 160350cc42ffSVenkateswararao Jujjuri (JV) if (IS_ERR(fid)) { 160450cc42ffSVenkateswararao Jujjuri (JV) err = PTR_ERR(fid); 160550cc42ffSVenkateswararao Jujjuri (JV) P9_DPRINTK(P9_DEBUG_VFS, "p9_client_walk failed %d\n", 160650cc42ffSVenkateswararao Jujjuri (JV) err); 160750cc42ffSVenkateswararao Jujjuri (JV) fid = NULL; 160850cc42ffSVenkateswararao Jujjuri (JV) goto error; 160950cc42ffSVenkateswararao Jujjuri (JV) } 161050cc42ffSVenkateswararao Jujjuri (JV) 161150cc42ffSVenkateswararao Jujjuri (JV) /* instantiate inode and assign the unopened fid to dentry */ 161250cc42ffSVenkateswararao Jujjuri (JV) inode = v9fs_inode_from_fid(v9ses, fid, dir->i_sb); 161350cc42ffSVenkateswararao Jujjuri (JV) if (IS_ERR(inode)) { 161450cc42ffSVenkateswararao Jujjuri (JV) err = PTR_ERR(inode); 161550cc42ffSVenkateswararao Jujjuri (JV) P9_DPRINTK(P9_DEBUG_VFS, "inode creation failed %d\n", 161650cc42ffSVenkateswararao Jujjuri (JV) err); 161750cc42ffSVenkateswararao Jujjuri (JV) goto error; 161850cc42ffSVenkateswararao Jujjuri (JV) } 161950cc42ffSVenkateswararao Jujjuri (JV) dentry->d_op = &v9fs_cached_dentry_operations; 162050cc42ffSVenkateswararao Jujjuri (JV) d_instantiate(dentry, inode); 162150cc42ffSVenkateswararao Jujjuri (JV) err = v9fs_fid_add(dentry, fid); 162250cc42ffSVenkateswararao Jujjuri (JV) if (err < 0) 162350cc42ffSVenkateswararao Jujjuri (JV) goto error; 162450cc42ffSVenkateswararao Jujjuri (JV) fid = NULL; 162550cc42ffSVenkateswararao Jujjuri (JV) } else { 162650cc42ffSVenkateswararao Jujjuri (JV) /* Not in cached mode. No need to populate inode with stat */ 162750cc42ffSVenkateswararao Jujjuri (JV) inode = v9fs_get_inode(dir->i_sb, S_IFLNK); 162850cc42ffSVenkateswararao Jujjuri (JV) if (IS_ERR(inode)) { 162950cc42ffSVenkateswararao Jujjuri (JV) err = PTR_ERR(inode); 163050cc42ffSVenkateswararao Jujjuri (JV) goto error; 163150cc42ffSVenkateswararao Jujjuri (JV) } 163250cc42ffSVenkateswararao Jujjuri (JV) dentry->d_op = &v9fs_dentry_operations; 163350cc42ffSVenkateswararao Jujjuri (JV) d_instantiate(dentry, inode); 163450cc42ffSVenkateswararao Jujjuri (JV) } 163550cc42ffSVenkateswararao Jujjuri (JV) 163650cc42ffSVenkateswararao Jujjuri (JV) error: 163750cc42ffSVenkateswararao Jujjuri (JV) if (fid) 163850cc42ffSVenkateswararao Jujjuri (JV) p9_client_clunk(fid); 163950cc42ffSVenkateswararao Jujjuri (JV) 164050cc42ffSVenkateswararao Jujjuri (JV) return err; 164150cc42ffSVenkateswararao Jujjuri (JV) } 164250cc42ffSVenkateswararao Jujjuri (JV) 164350cc42ffSVenkateswararao Jujjuri (JV) /** 1644531b1094SLatchesar Ionkov * v9fs_vfs_symlink - helper function to create symlinks 1645531b1094SLatchesar Ionkov * @dir: directory inode containing symlink 1646531b1094SLatchesar Ionkov * @dentry: dentry for symlink 1647531b1094SLatchesar Ionkov * @symname: symlink data 1648531b1094SLatchesar Ionkov * 1649ee443996SEric Van Hensbergen * See Also: 9P2000.u RFC for more information 1650531b1094SLatchesar Ionkov * 1651531b1094SLatchesar Ionkov */ 1652531b1094SLatchesar Ionkov 1653531b1094SLatchesar Ionkov static int 1654531b1094SLatchesar Ionkov v9fs_vfs_symlink(struct inode *dir, struct dentry *dentry, const char *symname) 1655531b1094SLatchesar Ionkov { 1656bd238fb4SLatchesar Ionkov P9_DPRINTK(P9_DEBUG_VFS, " %lu,%s,%s\n", dir->i_ino, 1657bd238fb4SLatchesar Ionkov dentry->d_name.name, symname); 1658531b1094SLatchesar Ionkov 1659531b1094SLatchesar Ionkov return v9fs_vfs_mkspecial(dir, dentry, S_IFLNK, symname); 1660531b1094SLatchesar Ionkov } 1661531b1094SLatchesar Ionkov 16622bad8471SEric Van Hensbergen /** 16632bad8471SEric Van Hensbergen * v9fs_vfs_link - create a hardlink 16642bad8471SEric Van Hensbergen * @old_dentry: dentry for file to link to 16652bad8471SEric Van Hensbergen * @dir: inode destination for new link 166673c592b9SEric Van Hensbergen * @dentry: dentry for link 16672bad8471SEric Van Hensbergen * 16682bad8471SEric Van Hensbergen */ 16692bad8471SEric Van Hensbergen 16702bad8471SEric Van Hensbergen static int 16712bad8471SEric Van Hensbergen v9fs_vfs_link(struct dentry *old_dentry, struct inode *dir, 16722bad8471SEric Van Hensbergen struct dentry *dentry) 16732bad8471SEric Van Hensbergen { 1674531b1094SLatchesar Ionkov int retval; 1675bd238fb4SLatchesar Ionkov struct p9_fid *oldfid; 1676531b1094SLatchesar Ionkov char *name; 16772bad8471SEric Van Hensbergen 1678bd238fb4SLatchesar Ionkov P9_DPRINTK(P9_DEBUG_VFS, 1679bd238fb4SLatchesar Ionkov " %lu,%s,%s\n", dir->i_ino, dentry->d_name.name, 16802bad8471SEric Van Hensbergen old_dentry->d_name.name); 16812bad8471SEric Van Hensbergen 1682da977b2cSEric Van Hensbergen oldfid = v9fs_fid_clone(old_dentry); 1683da977b2cSEric Van Hensbergen if (IS_ERR(oldfid)) 1684da977b2cSEric Van Hensbergen return PTR_ERR(oldfid); 16852bad8471SEric Van Hensbergen 1686531b1094SLatchesar Ionkov name = __getname(); 1687da977b2cSEric Van Hensbergen if (unlikely(!name)) { 1688da977b2cSEric Van Hensbergen retval = -ENOMEM; 1689da977b2cSEric Van Hensbergen goto clunk_fid; 1690da977b2cSEric Van Hensbergen } 16910710d36aSFlorin Malita 169216cce6d2SLatchesar Ionkov sprintf(name, "%d\n", oldfid->fid); 1693bd238fb4SLatchesar Ionkov retval = v9fs_vfs_mkspecial(dir, dentry, P9_DMLINK, name); 1694531b1094SLatchesar Ionkov __putname(name); 16952bad8471SEric Van Hensbergen 1696da977b2cSEric Van Hensbergen clunk_fid: 1697bd238fb4SLatchesar Ionkov p9_client_clunk(oldfid); 16982bad8471SEric Van Hensbergen return retval; 16992bad8471SEric Van Hensbergen } 17002bad8471SEric Van Hensbergen 17012bad8471SEric Van Hensbergen /** 170209d34ee5SEric Van Hensbergen * v9fs_vfs_link_dotl - create a hardlink for dotl 170309d34ee5SEric Van Hensbergen * @old_dentry: dentry for file to link to 170409d34ee5SEric Van Hensbergen * @dir: inode destination for new link 170509d34ee5SEric Van Hensbergen * @dentry: dentry for link 170609d34ee5SEric Van Hensbergen * 170709d34ee5SEric Van Hensbergen */ 170809d34ee5SEric Van Hensbergen 170909d34ee5SEric Van Hensbergen static int 171009d34ee5SEric Van Hensbergen v9fs_vfs_link_dotl(struct dentry *old_dentry, struct inode *dir, 171109d34ee5SEric Van Hensbergen struct dentry *dentry) 171209d34ee5SEric Van Hensbergen { 171309d34ee5SEric Van Hensbergen int err; 171409d34ee5SEric Van Hensbergen struct p9_fid *dfid, *oldfid; 171509d34ee5SEric Van Hensbergen char *name; 171609d34ee5SEric Van Hensbergen struct v9fs_session_info *v9ses; 171709d34ee5SEric Van Hensbergen struct dentry *dir_dentry; 171809d34ee5SEric Van Hensbergen 171909d34ee5SEric Van Hensbergen P9_DPRINTK(P9_DEBUG_VFS, "dir ino: %lu, old_name: %s, new_name: %s\n", 172009d34ee5SEric Van Hensbergen dir->i_ino, old_dentry->d_name.name, 172109d34ee5SEric Van Hensbergen dentry->d_name.name); 172209d34ee5SEric Van Hensbergen 172309d34ee5SEric Van Hensbergen v9ses = v9fs_inode2v9ses(dir); 172409d34ee5SEric Van Hensbergen dir_dentry = v9fs_dentry_from_dir_inode(dir); 172509d34ee5SEric Van Hensbergen dfid = v9fs_fid_lookup(dir_dentry); 172609d34ee5SEric Van Hensbergen if (IS_ERR(dfid)) 172709d34ee5SEric Van Hensbergen return PTR_ERR(dfid); 172809d34ee5SEric Van Hensbergen 172909d34ee5SEric Van Hensbergen oldfid = v9fs_fid_lookup(old_dentry); 173009d34ee5SEric Van Hensbergen if (IS_ERR(oldfid)) 173109d34ee5SEric Van Hensbergen return PTR_ERR(oldfid); 173209d34ee5SEric Van Hensbergen 173309d34ee5SEric Van Hensbergen name = (char *) dentry->d_name.name; 173409d34ee5SEric Van Hensbergen 173509d34ee5SEric Van Hensbergen err = p9_client_link(dfid, oldfid, (char *)dentry->d_name.name); 173609d34ee5SEric Van Hensbergen 173709d34ee5SEric Van Hensbergen if (err < 0) { 173809d34ee5SEric Van Hensbergen P9_DPRINTK(P9_DEBUG_VFS, "p9_client_link failed %d\n", err); 173909d34ee5SEric Van Hensbergen return err; 174009d34ee5SEric Van Hensbergen } 174109d34ee5SEric Van Hensbergen 174209d34ee5SEric Van Hensbergen if (v9ses->cache == CACHE_LOOSE || v9ses->cache == CACHE_FSCACHE) { 174309d34ee5SEric Van Hensbergen /* Get the latest stat info from server. */ 174409d34ee5SEric Van Hensbergen struct p9_fid *fid; 174509d34ee5SEric Van Hensbergen struct p9_stat_dotl *st; 174609d34ee5SEric Van Hensbergen 174709d34ee5SEric Van Hensbergen fid = v9fs_fid_lookup(old_dentry); 174809d34ee5SEric Van Hensbergen if (IS_ERR(fid)) 174909d34ee5SEric Van Hensbergen return PTR_ERR(fid); 175009d34ee5SEric Van Hensbergen 175109d34ee5SEric Van Hensbergen st = p9_client_getattr_dotl(fid, P9_STATS_BASIC); 175209d34ee5SEric Van Hensbergen if (IS_ERR(st)) 175309d34ee5SEric Van Hensbergen return PTR_ERR(st); 175409d34ee5SEric Van Hensbergen 175509d34ee5SEric Van Hensbergen v9fs_stat2inode_dotl(st, old_dentry->d_inode); 175609d34ee5SEric Van Hensbergen 175709d34ee5SEric Van Hensbergen kfree(st); 175809d34ee5SEric Van Hensbergen } else { 175909d34ee5SEric Van Hensbergen /* Caching disabled. No need to get upto date stat info. 176009d34ee5SEric Van Hensbergen * This dentry will be released immediately. So, just i_count++ 176109d34ee5SEric Van Hensbergen */ 176209d34ee5SEric Van Hensbergen atomic_inc(&old_dentry->d_inode->i_count); 176309d34ee5SEric Van Hensbergen } 176409d34ee5SEric Van Hensbergen 176509d34ee5SEric Van Hensbergen dentry->d_op = old_dentry->d_op; 176609d34ee5SEric Van Hensbergen d_instantiate(dentry, old_dentry->d_inode); 176709d34ee5SEric Van Hensbergen 176809d34ee5SEric Van Hensbergen return err; 176909d34ee5SEric Van Hensbergen } 177009d34ee5SEric Van Hensbergen 177109d34ee5SEric Van Hensbergen /** 17722bad8471SEric Van Hensbergen * v9fs_vfs_mknod - create a special file 17732bad8471SEric Van Hensbergen * @dir: inode destination for new link 17742bad8471SEric Van Hensbergen * @dentry: dentry for file 17752bad8471SEric Van Hensbergen * @mode: mode for creation 1776ee443996SEric Van Hensbergen * @rdev: device associated with special file 17772bad8471SEric Van Hensbergen * 17782bad8471SEric Van Hensbergen */ 17792bad8471SEric Van Hensbergen 17802bad8471SEric Van Hensbergen static int 17812bad8471SEric Van Hensbergen v9fs_vfs_mknod(struct inode *dir, struct dentry *dentry, int mode, dev_t rdev) 17822bad8471SEric Van Hensbergen { 1783531b1094SLatchesar Ionkov int retval; 1784531b1094SLatchesar Ionkov char *name; 17852bad8471SEric Van Hensbergen 1786bd238fb4SLatchesar Ionkov P9_DPRINTK(P9_DEBUG_VFS, 1787bd238fb4SLatchesar Ionkov " %lu,%s mode: %x MAJOR: %u MINOR: %u\n", dir->i_ino, 17882bad8471SEric Van Hensbergen dentry->d_name.name, mode, MAJOR(rdev), MINOR(rdev)); 17892bad8471SEric Van Hensbergen 1790531b1094SLatchesar Ionkov if (!new_valid_dev(rdev)) 1791531b1094SLatchesar Ionkov return -EINVAL; 179273c592b9SEric Van Hensbergen 1793531b1094SLatchesar Ionkov name = __getname(); 1794c0291a05SEugene Teo if (!name) 1795c0291a05SEugene Teo return -ENOMEM; 17962bad8471SEric Van Hensbergen /* build extension */ 17972bad8471SEric Van Hensbergen if (S_ISBLK(mode)) 1798531b1094SLatchesar Ionkov sprintf(name, "b %u %u", MAJOR(rdev), MINOR(rdev)); 17992bad8471SEric Van Hensbergen else if (S_ISCHR(mode)) 1800531b1094SLatchesar Ionkov sprintf(name, "c %u %u", MAJOR(rdev), MINOR(rdev)); 180173c592b9SEric Van Hensbergen else if (S_ISFIFO(mode)) 1802531b1094SLatchesar Ionkov *name = 0; 180375cc5c9bSVenkateswararao Jujjuri else if (S_ISSOCK(mode)) 180475cc5c9bSVenkateswararao Jujjuri *name = 0; 18052bad8471SEric Van Hensbergen else { 1806531b1094SLatchesar Ionkov __putname(name); 1807531b1094SLatchesar Ionkov return -EINVAL; 18082bad8471SEric Van Hensbergen } 18092bad8471SEric Van Hensbergen 1810531b1094SLatchesar Ionkov retval = v9fs_vfs_mkspecial(dir, dentry, mode, name); 1811531b1094SLatchesar Ionkov __putname(name); 18122bad8471SEric Van Hensbergen 18132bad8471SEric Van Hensbergen return retval; 18142bad8471SEric Van Hensbergen } 18152bad8471SEric Van Hensbergen 18164b43516aSM. Mohan Kumar /** 18174b43516aSM. Mohan Kumar * v9fs_vfs_mknod_dotl - create a special file 18184b43516aSM. Mohan Kumar * @dir: inode destination for new link 18194b43516aSM. Mohan Kumar * @dentry: dentry for file 18204b43516aSM. Mohan Kumar * @mode: mode for creation 18214b43516aSM. Mohan Kumar * @rdev: device associated with special file 18224b43516aSM. Mohan Kumar * 18234b43516aSM. Mohan Kumar */ 18244b43516aSM. Mohan Kumar static int 18254b43516aSM. Mohan Kumar v9fs_vfs_mknod_dotl(struct inode *dir, struct dentry *dentry, int mode, 18264b43516aSM. Mohan Kumar dev_t rdev) 18274b43516aSM. Mohan Kumar { 18284b43516aSM. Mohan Kumar int err; 18294b43516aSM. Mohan Kumar char *name; 18304b43516aSM. Mohan Kumar struct v9fs_session_info *v9ses; 18314b43516aSM. Mohan Kumar struct p9_fid *fid = NULL, *dfid = NULL; 18324b43516aSM. Mohan Kumar struct inode *inode; 18334b43516aSM. Mohan Kumar gid_t gid; 18344b43516aSM. Mohan Kumar struct p9_qid qid; 183501a622bdSM. Mohan Kumar struct dentry *dir_dentry; 18364b43516aSM. Mohan Kumar 18374b43516aSM. Mohan Kumar P9_DPRINTK(P9_DEBUG_VFS, 18384b43516aSM. Mohan Kumar " %lu,%s mode: %x MAJOR: %u MINOR: %u\n", dir->i_ino, 18394b43516aSM. Mohan Kumar dentry->d_name.name, mode, MAJOR(rdev), MINOR(rdev)); 18404b43516aSM. Mohan Kumar 18414b43516aSM. Mohan Kumar if (!new_valid_dev(rdev)) 18424b43516aSM. Mohan Kumar return -EINVAL; 18434b43516aSM. Mohan Kumar 18444b43516aSM. Mohan Kumar v9ses = v9fs_inode2v9ses(dir); 18454b43516aSM. Mohan Kumar dir_dentry = v9fs_dentry_from_dir_inode(dir); 184601a622bdSM. Mohan Kumar dfid = v9fs_fid_lookup(dir_dentry); 18474b43516aSM. Mohan Kumar if (IS_ERR(dfid)) { 18484b43516aSM. Mohan Kumar err = PTR_ERR(dfid); 18494b43516aSM. Mohan Kumar P9_DPRINTK(P9_DEBUG_VFS, "fid lookup failed %d\n", err); 18504b43516aSM. Mohan Kumar dfid = NULL; 18514b43516aSM. Mohan Kumar goto error; 18524b43516aSM. Mohan Kumar } 18534b43516aSM. Mohan Kumar 18544b43516aSM. Mohan Kumar gid = v9fs_get_fsgid_for_create(dir); 18554b43516aSM. Mohan Kumar if (gid < 0) { 18564b43516aSM. Mohan Kumar P9_DPRINTK(P9_DEBUG_VFS, "v9fs_get_fsgid_for_create failed\n"); 18574b43516aSM. Mohan Kumar goto error; 18584b43516aSM. Mohan Kumar } 18594b43516aSM. Mohan Kumar 18604b43516aSM. Mohan Kumar name = (char *) dentry->d_name.name; 18614b43516aSM. Mohan Kumar 18624b43516aSM. Mohan Kumar err = p9_client_mknod_dotl(dfid, name, mode, rdev, gid, &qid); 18634b43516aSM. Mohan Kumar if (err < 0) 18644b43516aSM. Mohan Kumar goto error; 18654b43516aSM. Mohan Kumar 18664b43516aSM. Mohan Kumar /* instantiate inode and assign the unopened fid to the dentry */ 18674b43516aSM. Mohan Kumar if (v9ses->cache == CACHE_LOOSE || v9ses->cache == CACHE_FSCACHE) { 18684b43516aSM. Mohan Kumar fid = p9_client_walk(dfid, 1, &name, 1); 18694b43516aSM. Mohan Kumar if (IS_ERR(fid)) { 18704b43516aSM. Mohan Kumar err = PTR_ERR(fid); 18714b43516aSM. Mohan Kumar P9_DPRINTK(P9_DEBUG_VFS, "p9_client_walk failed %d\n", 18724b43516aSM. Mohan Kumar err); 18734b43516aSM. Mohan Kumar fid = NULL; 18744b43516aSM. Mohan Kumar goto error; 18754b43516aSM. Mohan Kumar } 18764b43516aSM. Mohan Kumar 18774b43516aSM. Mohan Kumar inode = v9fs_inode_from_fid(v9ses, fid, dir->i_sb); 18784b43516aSM. Mohan Kumar if (IS_ERR(inode)) { 18794b43516aSM. Mohan Kumar err = PTR_ERR(inode); 18804b43516aSM. Mohan Kumar P9_DPRINTK(P9_DEBUG_VFS, "inode creation failed %d\n", 18814b43516aSM. Mohan Kumar err); 18824b43516aSM. Mohan Kumar goto error; 18834b43516aSM. Mohan Kumar } 18844b43516aSM. Mohan Kumar dentry->d_op = &v9fs_cached_dentry_operations; 18854b43516aSM. Mohan Kumar d_instantiate(dentry, inode); 18864b43516aSM. Mohan Kumar err = v9fs_fid_add(dentry, fid); 18874b43516aSM. Mohan Kumar if (err < 0) 18884b43516aSM. Mohan Kumar goto error; 18894b43516aSM. Mohan Kumar fid = NULL; 18904b43516aSM. Mohan Kumar } else { 18914b43516aSM. Mohan Kumar /* 18924b43516aSM. Mohan Kumar * Not in cached mode. No need to populate inode with stat. 18934b43516aSM. Mohan Kumar * socket syscall returns a fd, so we need instantiate 18944b43516aSM. Mohan Kumar */ 18954b43516aSM. Mohan Kumar inode = v9fs_get_inode(dir->i_sb, mode); 18964b43516aSM. Mohan Kumar if (IS_ERR(inode)) { 18974b43516aSM. Mohan Kumar err = PTR_ERR(inode); 18984b43516aSM. Mohan Kumar goto error; 18994b43516aSM. Mohan Kumar } 19004b43516aSM. Mohan Kumar dentry->d_op = &v9fs_dentry_operations; 19014b43516aSM. Mohan Kumar d_instantiate(dentry, inode); 19024b43516aSM. Mohan Kumar } 19034b43516aSM. Mohan Kumar 19044b43516aSM. Mohan Kumar error: 19054b43516aSM. Mohan Kumar if (fid) 19064b43516aSM. Mohan Kumar p9_client_clunk(fid); 19074b43516aSM. Mohan Kumar return err; 19084b43516aSM. Mohan Kumar } 19094b43516aSM. Mohan Kumar 19109b6533c9SSripathi Kodi static const struct inode_operations v9fs_dir_inode_operations_dotu = { 19119b6533c9SSripathi Kodi .create = v9fs_vfs_create, 19129b6533c9SSripathi Kodi .lookup = v9fs_vfs_lookup, 19139b6533c9SSripathi Kodi .symlink = v9fs_vfs_symlink, 191450cc42ffSVenkateswararao Jujjuri (JV) .link = v9fs_vfs_link, 19159b6533c9SSripathi Kodi .unlink = v9fs_vfs_unlink, 19169b6533c9SSripathi Kodi .mkdir = v9fs_vfs_mkdir, 19179b6533c9SSripathi Kodi .rmdir = v9fs_vfs_rmdir, 19184b43516aSM. Mohan Kumar .mknod = v9fs_vfs_mknod_dotl, 19199b6533c9SSripathi Kodi .rename = v9fs_vfs_rename, 19209b6533c9SSripathi Kodi .getattr = v9fs_vfs_getattr, 19219b6533c9SSripathi Kodi .setattr = v9fs_vfs_setattr, 19229b6533c9SSripathi Kodi }; 19239b6533c9SSripathi Kodi 19249b6533c9SSripathi Kodi static const struct inode_operations v9fs_dir_inode_operations_dotl = { 19255643135aSVenkateswararao Jujjuri (JV) .create = v9fs_vfs_create_dotl, 19262bad8471SEric Van Hensbergen .lookup = v9fs_vfs_lookup, 192750cc42ffSVenkateswararao Jujjuri (JV) .link = v9fs_vfs_link_dotl, 192850cc42ffSVenkateswararao Jujjuri (JV) .symlink = v9fs_vfs_symlink_dotl, 19292bad8471SEric Van Hensbergen .unlink = v9fs_vfs_unlink, 193001a622bdSM. Mohan Kumar .mkdir = v9fs_vfs_mkdir_dotl, 19312bad8471SEric Van Hensbergen .rmdir = v9fs_vfs_rmdir, 19324b43516aSM. Mohan Kumar .mknod = v9fs_vfs_mknod_dotl, 19332bad8471SEric Van Hensbergen .rename = v9fs_vfs_rename, 1934f0853122SSripathi Kodi .getattr = v9fs_vfs_getattr_dotl, 193587d7845aSSripathi Kodi .setattr = v9fs_vfs_setattr_dotl, 1936ebf46264SAneesh Kumar K.V .setxattr = generic_setxattr, 1937ebf46264SAneesh Kumar K.V .getxattr = generic_getxattr, 1938ebf46264SAneesh Kumar K.V .removexattr = generic_removexattr, 1939ebf46264SAneesh Kumar K.V .listxattr = v9fs_listxattr, 1940ebf46264SAneesh Kumar K.V 19412bad8471SEric Van Hensbergen }; 19422bad8471SEric Van Hensbergen 1943754661f1SArjan van de Ven static const struct inode_operations v9fs_dir_inode_operations = { 1944b501611aSEric Van Hensbergen .create = v9fs_vfs_create, 1945b501611aSEric Van Hensbergen .lookup = v9fs_vfs_lookup, 1946b501611aSEric Van Hensbergen .unlink = v9fs_vfs_unlink, 1947b501611aSEric Van Hensbergen .mkdir = v9fs_vfs_mkdir, 1948b501611aSEric Van Hensbergen .rmdir = v9fs_vfs_rmdir, 1949b501611aSEric Van Hensbergen .mknod = v9fs_vfs_mknod, 1950b501611aSEric Van Hensbergen .rename = v9fs_vfs_rename, 1951b501611aSEric Van Hensbergen .getattr = v9fs_vfs_getattr, 1952b501611aSEric Van Hensbergen .setattr = v9fs_vfs_setattr, 1953b501611aSEric Van Hensbergen }; 1954b501611aSEric Van Hensbergen 1955754661f1SArjan van de Ven static const struct inode_operations v9fs_file_inode_operations = { 19562bad8471SEric Van Hensbergen .getattr = v9fs_vfs_getattr, 19572bad8471SEric Van Hensbergen .setattr = v9fs_vfs_setattr, 19582bad8471SEric Van Hensbergen }; 19592bad8471SEric Van Hensbergen 19609b6533c9SSripathi Kodi static const struct inode_operations v9fs_file_inode_operations_dotl = { 1961f0853122SSripathi Kodi .getattr = v9fs_vfs_getattr_dotl, 196287d7845aSSripathi Kodi .setattr = v9fs_vfs_setattr_dotl, 1963ebf46264SAneesh Kumar K.V .setxattr = generic_setxattr, 1964ebf46264SAneesh Kumar K.V .getxattr = generic_getxattr, 1965ebf46264SAneesh Kumar K.V .removexattr = generic_removexattr, 1966ebf46264SAneesh Kumar K.V .listxattr = v9fs_listxattr, 19679b6533c9SSripathi Kodi }; 19689b6533c9SSripathi Kodi 1969754661f1SArjan van de Ven static const struct inode_operations v9fs_symlink_inode_operations = { 1970204f2f0eSAl Viro .readlink = generic_readlink, 19712bad8471SEric Van Hensbergen .follow_link = v9fs_vfs_follow_link, 19722bad8471SEric Van Hensbergen .put_link = v9fs_vfs_put_link, 19732bad8471SEric Van Hensbergen .getattr = v9fs_vfs_getattr, 19742bad8471SEric Van Hensbergen .setattr = v9fs_vfs_setattr, 19752bad8471SEric Van Hensbergen }; 19769b6533c9SSripathi Kodi 19779b6533c9SSripathi Kodi static const struct inode_operations v9fs_symlink_inode_operations_dotl = { 19789b6533c9SSripathi Kodi .readlink = generic_readlink, 19799b6533c9SSripathi Kodi .follow_link = v9fs_vfs_follow_link, 19809b6533c9SSripathi Kodi .put_link = v9fs_vfs_put_link, 1981f0853122SSripathi Kodi .getattr = v9fs_vfs_getattr_dotl, 198287d7845aSSripathi Kodi .setattr = v9fs_vfs_setattr_dotl, 1983ebf46264SAneesh Kumar K.V .setxattr = generic_setxattr, 1984ebf46264SAneesh Kumar K.V .getxattr = generic_getxattr, 1985ebf46264SAneesh Kumar K.V .removexattr = generic_removexattr, 1986ebf46264SAneesh Kumar K.V .listxattr = v9fs_listxattr, 19879b6533c9SSripathi Kodi }; 1988