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 263ea137533SEric Van Hensbergen static 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 */ 433b57922d9SAl Viro void v9fs_evict_inode(struct inode *inode) 43460e78d2cSAbhishek Kulkarni { 435b57922d9SAl Viro truncate_inode_pages(inode->i_mapping, 0); 436b57922d9SAl Viro end_writeback(inode); 43760e78d2cSAbhishek Kulkarni filemap_fdatawrite(inode->i_mapping); 43860e78d2cSAbhishek Kulkarni 43960e78d2cSAbhishek Kulkarni #ifdef CONFIG_9P_FSCACHE 44060e78d2cSAbhishek Kulkarni v9fs_cache_inode_put_cookie(inode); 44160e78d2cSAbhishek Kulkarni #endif 44260e78d2cSAbhishek Kulkarni } 44360e78d2cSAbhishek Kulkarni 4445174fdabSLatchesar Ionkov static struct inode * 445f0853122SSripathi Kodi v9fs_inode(struct v9fs_session_info *v9ses, struct p9_fid *fid, 4466a3124a3SLatchesar Ionkov struct super_block *sb) 4476a3124a3SLatchesar Ionkov { 4486a3124a3SLatchesar Ionkov int err, umode; 449f0853122SSripathi Kodi struct inode *ret = NULL; 45051a87c55SEric Van Hensbergen struct p9_wstat *st; 4516a3124a3SLatchesar Ionkov 452bd238fb4SLatchesar Ionkov st = p9_client_stat(fid); 45302bc3567SAbhishek Kulkarni if (IS_ERR(st)) 45402bc3567SAbhishek Kulkarni return ERR_CAST(st); 4552bad8471SEric Van Hensbergen 456bd238fb4SLatchesar Ionkov umode = p9mode2unixmode(v9ses, st->mode); 4576a3124a3SLatchesar Ionkov ret = v9fs_get_inode(sb, umode); 4586a3124a3SLatchesar Ionkov if (IS_ERR(ret)) { 4596a3124a3SLatchesar Ionkov err = PTR_ERR(ret); 4606a3124a3SLatchesar Ionkov goto error; 4612bad8471SEric Van Hensbergen } 4622bad8471SEric Van Hensbergen 463bd238fb4SLatchesar Ionkov v9fs_stat2inode(st, ret, sb); 464bd238fb4SLatchesar Ionkov ret->i_ino = v9fs_qid2ino(&st->qid); 46560e78d2cSAbhishek Kulkarni 46660e78d2cSAbhishek Kulkarni #ifdef CONFIG_9P_FSCACHE 46760e78d2cSAbhishek Kulkarni v9fs_vcookie_set_qid(ret, &st->qid); 46860e78d2cSAbhishek Kulkarni v9fs_cache_inode_get_cookie(ret); 46960e78d2cSAbhishek Kulkarni #endif 47002bc3567SAbhishek Kulkarni p9stat_free(st); 471bd238fb4SLatchesar Ionkov kfree(st); 4726a3124a3SLatchesar Ionkov return ret; 4736a3124a3SLatchesar Ionkov error: 47402bc3567SAbhishek Kulkarni p9stat_free(st); 475bd238fb4SLatchesar Ionkov kfree(st); 4766a3124a3SLatchesar Ionkov return ERR_PTR(err); 4772bad8471SEric Van Hensbergen } 4782bad8471SEric Van Hensbergen 479f0853122SSripathi Kodi static struct inode * 480f0853122SSripathi Kodi v9fs_inode_dotl(struct v9fs_session_info *v9ses, struct p9_fid *fid, 481f0853122SSripathi Kodi struct super_block *sb) 482f0853122SSripathi Kodi { 483f0853122SSripathi Kodi struct inode *ret = NULL; 484f0853122SSripathi Kodi int err; 485f0853122SSripathi Kodi struct p9_stat_dotl *st; 486f0853122SSripathi Kodi 487f0853122SSripathi Kodi st = p9_client_getattr_dotl(fid, P9_STATS_BASIC); 488f0853122SSripathi Kodi if (IS_ERR(st)) 489f0853122SSripathi Kodi return ERR_CAST(st); 490f0853122SSripathi Kodi 491f0853122SSripathi Kodi ret = v9fs_get_inode(sb, st->st_mode); 492f0853122SSripathi Kodi if (IS_ERR(ret)) { 493f0853122SSripathi Kodi err = PTR_ERR(ret); 494f0853122SSripathi Kodi goto error; 495f0853122SSripathi Kodi } 496f0853122SSripathi Kodi 497f0853122SSripathi Kodi v9fs_stat2inode_dotl(st, ret); 498f0853122SSripathi Kodi ret->i_ino = v9fs_qid2ino(&st->qid); 499f0853122SSripathi Kodi #ifdef CONFIG_9P_FSCACHE 500f0853122SSripathi Kodi v9fs_vcookie_set_qid(ret, &st->qid); 501f0853122SSripathi Kodi v9fs_cache_inode_get_cookie(ret); 502f0853122SSripathi Kodi #endif 503f0853122SSripathi Kodi kfree(st); 504f0853122SSripathi Kodi return ret; 505f0853122SSripathi Kodi error: 506f0853122SSripathi Kodi kfree(st); 507f0853122SSripathi Kodi return ERR_PTR(err); 508f0853122SSripathi Kodi } 509f0853122SSripathi Kodi 510f0853122SSripathi Kodi /** 511f0853122SSripathi Kodi * v9fs_inode_from_fid - Helper routine to populate an inode by 512f0853122SSripathi Kodi * issuing a attribute request 513f0853122SSripathi Kodi * @v9ses: session information 514f0853122SSripathi Kodi * @fid: fid to issue attribute request for 515f0853122SSripathi Kodi * @sb: superblock on which to create inode 516f0853122SSripathi Kodi * 517f0853122SSripathi Kodi */ 518f0853122SSripathi Kodi static inline struct inode * 519f0853122SSripathi Kodi v9fs_inode_from_fid(struct v9fs_session_info *v9ses, struct p9_fid *fid, 520f0853122SSripathi Kodi struct super_block *sb) 521f0853122SSripathi Kodi { 522f0853122SSripathi Kodi if (v9fs_proto_dotl(v9ses)) 523f0853122SSripathi Kodi return v9fs_inode_dotl(v9ses, fid, sb); 524f0853122SSripathi Kodi else 525f0853122SSripathi Kodi return v9fs_inode(v9ses, fid, sb); 526f0853122SSripathi Kodi } 527f0853122SSripathi Kodi 5282bad8471SEric Van Hensbergen /** 5292bad8471SEric Van Hensbergen * v9fs_remove - helper function to remove files and directories 53073c592b9SEric Van Hensbergen * @dir: directory inode that is being deleted 53173c592b9SEric Van Hensbergen * @file: dentry that is being deleted 53273c592b9SEric Van Hensbergen * @rmdir: removing a directory 5332bad8471SEric Van Hensbergen * 5342bad8471SEric Van Hensbergen */ 5352bad8471SEric Van Hensbergen 5362bad8471SEric Van Hensbergen static int v9fs_remove(struct inode *dir, struct dentry *file, int rmdir) 5372bad8471SEric Van Hensbergen { 538d994f405SAneesh Kumar K.V int retval; 539bd238fb4SLatchesar Ionkov struct inode *file_inode; 540bd238fb4SLatchesar Ionkov struct p9_fid *v9fid; 5412bad8471SEric Van Hensbergen 542bd238fb4SLatchesar Ionkov P9_DPRINTK(P9_DEBUG_VFS, "inode: %p dentry: %p rmdir: %d\n", dir, file, 5432bad8471SEric Van Hensbergen rmdir); 5442bad8471SEric Van Hensbergen 5452bad8471SEric Van Hensbergen file_inode = file->d_inode; 546c959df9fSLatchesar Ionkov v9fid = v9fs_fid_clone(file); 547da977b2cSEric Van Hensbergen if (IS_ERR(v9fid)) 548da977b2cSEric Van Hensbergen return PTR_ERR(v9fid); 5492bad8471SEric Van Hensbergen 550d994f405SAneesh Kumar K.V retval = p9_client_remove(v9fid); 551d994f405SAneesh Kumar K.V if (!retval) 552d994f405SAneesh Kumar K.V drop_nlink(file_inode); 553d994f405SAneesh Kumar K.V return retval; 5542bad8471SEric Van Hensbergen } 5552bad8471SEric Van Hensbergen 5566a3124a3SLatchesar Ionkov static int 5576a3124a3SLatchesar Ionkov v9fs_open_created(struct inode *inode, struct file *file) 5586a3124a3SLatchesar Ionkov { 5596a3124a3SLatchesar Ionkov return 0; 5606a3124a3SLatchesar Ionkov } 5616a3124a3SLatchesar Ionkov 562bd238fb4SLatchesar Ionkov 563bd238fb4SLatchesar Ionkov /** 564bd238fb4SLatchesar Ionkov * v9fs_create - Create a file 565ee443996SEric Van Hensbergen * @v9ses: session information 566ee443996SEric Van Hensbergen * @dir: directory that dentry is being created in 567bd238fb4SLatchesar Ionkov * @dentry: dentry that is being created 5680e15597eSAbhishek Kulkarni * @extension: 9p2000.u extension string to support devices, etc. 569bd238fb4SLatchesar Ionkov * @perm: create permissions 570bd238fb4SLatchesar Ionkov * @mode: open mode 571bd238fb4SLatchesar Ionkov * 572bd238fb4SLatchesar Ionkov */ 573bd238fb4SLatchesar Ionkov static struct p9_fid * 574bd238fb4SLatchesar Ionkov v9fs_create(struct v9fs_session_info *v9ses, struct inode *dir, 575bd238fb4SLatchesar Ionkov struct dentry *dentry, char *extension, u32 perm, u8 mode) 576bd238fb4SLatchesar Ionkov { 577bd238fb4SLatchesar Ionkov int err; 578bd238fb4SLatchesar Ionkov char *name; 579bd238fb4SLatchesar Ionkov struct p9_fid *dfid, *ofid, *fid; 580bd238fb4SLatchesar Ionkov struct inode *inode; 581bd238fb4SLatchesar Ionkov 58251a87c55SEric Van Hensbergen P9_DPRINTK(P9_DEBUG_VFS, "name %s\n", dentry->d_name.name); 58351a87c55SEric Van Hensbergen 584bd238fb4SLatchesar Ionkov err = 0; 585bd238fb4SLatchesar Ionkov ofid = NULL; 586bd238fb4SLatchesar Ionkov fid = NULL; 587bd238fb4SLatchesar Ionkov name = (char *) dentry->d_name.name; 5886d27e64dSVenkateswararao Jujjuri dfid = v9fs_fid_lookup(dentry->d_parent); 589bd238fb4SLatchesar Ionkov if (IS_ERR(dfid)) { 590bd238fb4SLatchesar Ionkov err = PTR_ERR(dfid); 5916d27e64dSVenkateswararao Jujjuri P9_DPRINTK(P9_DEBUG_VFS, "fid lookup failed %d\n", err); 5926d27e64dSVenkateswararao Jujjuri return ERR_PTR(err); 593bd238fb4SLatchesar Ionkov } 594bd238fb4SLatchesar Ionkov 595bd238fb4SLatchesar Ionkov /* clone a fid to use for creation */ 596bd238fb4SLatchesar Ionkov ofid = p9_client_walk(dfid, 0, NULL, 1); 597bd238fb4SLatchesar Ionkov if (IS_ERR(ofid)) { 598bd238fb4SLatchesar Ionkov err = PTR_ERR(ofid); 59951a87c55SEric Van Hensbergen P9_DPRINTK(P9_DEBUG_VFS, "p9_client_walk failed %d\n", err); 6006d27e64dSVenkateswararao Jujjuri return ERR_PTR(err); 601bd238fb4SLatchesar Ionkov } 602bd238fb4SLatchesar Ionkov 603bd238fb4SLatchesar Ionkov err = p9_client_fcreate(ofid, name, perm, mode, extension); 60451a87c55SEric Van Hensbergen if (err < 0) { 60551a87c55SEric Van Hensbergen P9_DPRINTK(P9_DEBUG_VFS, "p9_client_fcreate failed %d\n", err); 606bd238fb4SLatchesar Ionkov goto error; 60751a87c55SEric Van Hensbergen } 608bd238fb4SLatchesar Ionkov 609bd238fb4SLatchesar Ionkov /* now walk from the parent so we can get unopened fid */ 6106d27e64dSVenkateswararao Jujjuri fid = p9_client_walk(dfid, 1, &name, 1); 611bd238fb4SLatchesar Ionkov if (IS_ERR(fid)) { 612bd238fb4SLatchesar Ionkov err = PTR_ERR(fid); 61351a87c55SEric Van Hensbergen P9_DPRINTK(P9_DEBUG_VFS, "p9_client_walk failed %d\n", err); 614bd238fb4SLatchesar Ionkov fid = NULL; 615bd238fb4SLatchesar Ionkov goto error; 6166d27e64dSVenkateswararao Jujjuri } 617bd238fb4SLatchesar Ionkov 618bd238fb4SLatchesar Ionkov /* instantiate inode and assign the unopened fid to the dentry */ 619bd238fb4SLatchesar Ionkov inode = v9fs_inode_from_fid(v9ses, fid, dir->i_sb); 620bd238fb4SLatchesar Ionkov if (IS_ERR(inode)) { 621bd238fb4SLatchesar Ionkov err = PTR_ERR(inode); 62251a87c55SEric Van Hensbergen P9_DPRINTK(P9_DEBUG_VFS, "inode creation failed %d\n", err); 623bd238fb4SLatchesar Ionkov goto error; 624bd238fb4SLatchesar Ionkov } 625bd238fb4SLatchesar Ionkov 626bd238fb4SLatchesar Ionkov if (v9ses->cache) 627bd238fb4SLatchesar Ionkov dentry->d_op = &v9fs_cached_dentry_operations; 628bd238fb4SLatchesar Ionkov else 629bd238fb4SLatchesar Ionkov dentry->d_op = &v9fs_dentry_operations; 630bd238fb4SLatchesar Ionkov 631bd238fb4SLatchesar Ionkov d_instantiate(dentry, inode); 63250fb6d2bSAbhishek Kulkarni err = v9fs_fid_add(dentry, fid); 63350fb6d2bSAbhishek Kulkarni if (err < 0) 63450fb6d2bSAbhishek Kulkarni goto error; 63550fb6d2bSAbhishek Kulkarni 636bd238fb4SLatchesar Ionkov return ofid; 637bd238fb4SLatchesar Ionkov 638bd238fb4SLatchesar Ionkov error: 639bd238fb4SLatchesar Ionkov if (ofid) 640bd238fb4SLatchesar Ionkov p9_client_clunk(ofid); 641bd238fb4SLatchesar Ionkov 642bd238fb4SLatchesar Ionkov if (fid) 643bd238fb4SLatchesar Ionkov p9_client_clunk(fid); 644bd238fb4SLatchesar Ionkov 645bd238fb4SLatchesar Ionkov return ERR_PTR(err); 646bd238fb4SLatchesar Ionkov } 647bd238fb4SLatchesar Ionkov 6482bad8471SEric Van Hensbergen /** 6495643135aSVenkateswararao Jujjuri (JV) * v9fs_vfs_create_dotl - VFS hook to create files for 9P2000.L protocol. 6505643135aSVenkateswararao Jujjuri (JV) * @dir: directory inode that is being created 6515643135aSVenkateswararao Jujjuri (JV) * @dentry: dentry that is being deleted 6525643135aSVenkateswararao Jujjuri (JV) * @mode: create permissions 6535643135aSVenkateswararao Jujjuri (JV) * @nd: path information 6545643135aSVenkateswararao Jujjuri (JV) * 6555643135aSVenkateswararao Jujjuri (JV) */ 6565643135aSVenkateswararao Jujjuri (JV) 6575643135aSVenkateswararao Jujjuri (JV) static int 6585643135aSVenkateswararao Jujjuri (JV) v9fs_vfs_create_dotl(struct inode *dir, struct dentry *dentry, int mode, 6595643135aSVenkateswararao Jujjuri (JV) struct nameidata *nd) 6605643135aSVenkateswararao Jujjuri (JV) { 6615643135aSVenkateswararao Jujjuri (JV) int err = 0; 6625643135aSVenkateswararao Jujjuri (JV) char *name = NULL; 6635643135aSVenkateswararao Jujjuri (JV) gid_t gid; 6645643135aSVenkateswararao Jujjuri (JV) int flags; 6655643135aSVenkateswararao Jujjuri (JV) struct v9fs_session_info *v9ses; 6665643135aSVenkateswararao Jujjuri (JV) struct p9_fid *fid = NULL; 6675643135aSVenkateswararao Jujjuri (JV) struct p9_fid *dfid, *ofid; 6685643135aSVenkateswararao Jujjuri (JV) struct file *filp; 6695643135aSVenkateswararao Jujjuri (JV) struct p9_qid qid; 6705643135aSVenkateswararao Jujjuri (JV) struct inode *inode; 6715643135aSVenkateswararao Jujjuri (JV) 6725643135aSVenkateswararao Jujjuri (JV) v9ses = v9fs_inode2v9ses(dir); 6735643135aSVenkateswararao Jujjuri (JV) if (nd && nd->flags & LOOKUP_OPEN) 6745643135aSVenkateswararao Jujjuri (JV) flags = nd->intent.open.flags - 1; 6755643135aSVenkateswararao Jujjuri (JV) else 6765643135aSVenkateswararao Jujjuri (JV) flags = O_RDWR; 6775643135aSVenkateswararao Jujjuri (JV) 6785643135aSVenkateswararao Jujjuri (JV) name = (char *) dentry->d_name.name; 6795643135aSVenkateswararao Jujjuri (JV) P9_DPRINTK(P9_DEBUG_VFS, "v9fs_vfs_create_dotl: name:%s flags:0x%x " 6805643135aSVenkateswararao Jujjuri (JV) "mode:0x%x\n", name, flags, mode); 6815643135aSVenkateswararao Jujjuri (JV) 6825643135aSVenkateswararao Jujjuri (JV) dfid = v9fs_fid_lookup(dentry->d_parent); 6835643135aSVenkateswararao Jujjuri (JV) if (IS_ERR(dfid)) { 6845643135aSVenkateswararao Jujjuri (JV) err = PTR_ERR(dfid); 6855643135aSVenkateswararao Jujjuri (JV) P9_DPRINTK(P9_DEBUG_VFS, "fid lookup failed %d\n", err); 6865643135aSVenkateswararao Jujjuri (JV) return err; 6875643135aSVenkateswararao Jujjuri (JV) } 6885643135aSVenkateswararao Jujjuri (JV) 6895643135aSVenkateswararao Jujjuri (JV) /* clone a fid to use for creation */ 6905643135aSVenkateswararao Jujjuri (JV) ofid = p9_client_walk(dfid, 0, NULL, 1); 6915643135aSVenkateswararao Jujjuri (JV) if (IS_ERR(ofid)) { 6925643135aSVenkateswararao Jujjuri (JV) err = PTR_ERR(ofid); 6935643135aSVenkateswararao Jujjuri (JV) P9_DPRINTK(P9_DEBUG_VFS, "p9_client_walk failed %d\n", err); 6945643135aSVenkateswararao Jujjuri (JV) return err; 6955643135aSVenkateswararao Jujjuri (JV) } 6965643135aSVenkateswararao Jujjuri (JV) 6975643135aSVenkateswararao Jujjuri (JV) gid = v9fs_get_fsgid_for_create(dir); 6985643135aSVenkateswararao Jujjuri (JV) err = p9_client_create_dotl(ofid, name, flags, mode, gid, &qid); 6995643135aSVenkateswararao Jujjuri (JV) if (err < 0) { 7005643135aSVenkateswararao Jujjuri (JV) P9_DPRINTK(P9_DEBUG_VFS, 7015643135aSVenkateswararao Jujjuri (JV) "p9_client_open_dotl failed in creat %d\n", 7025643135aSVenkateswararao Jujjuri (JV) err); 7035643135aSVenkateswararao Jujjuri (JV) goto error; 7045643135aSVenkateswararao Jujjuri (JV) } 7055643135aSVenkateswararao Jujjuri (JV) 7065643135aSVenkateswararao Jujjuri (JV) /* No need to populate the inode if we are not opening the file AND 7075643135aSVenkateswararao Jujjuri (JV) * not in cached mode. 7085643135aSVenkateswararao Jujjuri (JV) */ 7095643135aSVenkateswararao Jujjuri (JV) if (!v9ses->cache && !(nd && nd->flags & LOOKUP_OPEN)) { 7105643135aSVenkateswararao Jujjuri (JV) /* Not in cached mode. No need to populate inode with stat */ 7115643135aSVenkateswararao Jujjuri (JV) dentry->d_op = &v9fs_dentry_operations; 7125643135aSVenkateswararao Jujjuri (JV) p9_client_clunk(ofid); 7135643135aSVenkateswararao Jujjuri (JV) d_instantiate(dentry, NULL); 7145643135aSVenkateswararao Jujjuri (JV) return 0; 7155643135aSVenkateswararao Jujjuri (JV) } 7165643135aSVenkateswararao Jujjuri (JV) 7175643135aSVenkateswararao Jujjuri (JV) /* Now walk from the parent so we can get an unopened fid. */ 7185643135aSVenkateswararao Jujjuri (JV) fid = p9_client_walk(dfid, 1, &name, 1); 7195643135aSVenkateswararao Jujjuri (JV) if (IS_ERR(fid)) { 7205643135aSVenkateswararao Jujjuri (JV) err = PTR_ERR(fid); 7215643135aSVenkateswararao Jujjuri (JV) P9_DPRINTK(P9_DEBUG_VFS, "p9_client_walk failed %d\n", err); 7225643135aSVenkateswararao Jujjuri (JV) fid = NULL; 7235643135aSVenkateswararao Jujjuri (JV) goto error; 7245643135aSVenkateswararao Jujjuri (JV) } 7255643135aSVenkateswararao Jujjuri (JV) 7265643135aSVenkateswararao Jujjuri (JV) /* instantiate inode and assign the unopened fid to dentry */ 7275643135aSVenkateswararao Jujjuri (JV) inode = v9fs_inode_from_fid(v9ses, fid, dir->i_sb); 7285643135aSVenkateswararao Jujjuri (JV) if (IS_ERR(inode)) { 7295643135aSVenkateswararao Jujjuri (JV) err = PTR_ERR(inode); 7305643135aSVenkateswararao Jujjuri (JV) P9_DPRINTK(P9_DEBUG_VFS, "inode creation failed %d\n", err); 7315643135aSVenkateswararao Jujjuri (JV) goto error; 7325643135aSVenkateswararao Jujjuri (JV) } 7333c30750fSAneesh Kumar K.V if (v9ses->cache) 7345643135aSVenkateswararao Jujjuri (JV) dentry->d_op = &v9fs_cached_dentry_operations; 7353c30750fSAneesh Kumar K.V else 7363c30750fSAneesh Kumar K.V dentry->d_op = &v9fs_dentry_operations; 7375643135aSVenkateswararao Jujjuri (JV) d_instantiate(dentry, inode); 7385643135aSVenkateswararao Jujjuri (JV) err = v9fs_fid_add(dentry, fid); 7395643135aSVenkateswararao Jujjuri (JV) if (err < 0) 7405643135aSVenkateswararao Jujjuri (JV) goto error; 7415643135aSVenkateswararao Jujjuri (JV) 7425643135aSVenkateswararao Jujjuri (JV) /* if we are opening a file, assign the open fid to the file */ 7435643135aSVenkateswararao Jujjuri (JV) if (nd && nd->flags & LOOKUP_OPEN) { 7445643135aSVenkateswararao Jujjuri (JV) filp = lookup_instantiate_filp(nd, dentry, v9fs_open_created); 7455643135aSVenkateswararao Jujjuri (JV) if (IS_ERR(filp)) { 7465643135aSVenkateswararao Jujjuri (JV) p9_client_clunk(ofid); 7475643135aSVenkateswararao Jujjuri (JV) return PTR_ERR(filp); 7485643135aSVenkateswararao Jujjuri (JV) } 7495643135aSVenkateswararao Jujjuri (JV) filp->private_data = ofid; 7505643135aSVenkateswararao Jujjuri (JV) } else 7515643135aSVenkateswararao Jujjuri (JV) p9_client_clunk(ofid); 7525643135aSVenkateswararao Jujjuri (JV) 7535643135aSVenkateswararao Jujjuri (JV) return 0; 7545643135aSVenkateswararao Jujjuri (JV) 7555643135aSVenkateswararao Jujjuri (JV) error: 7565643135aSVenkateswararao Jujjuri (JV) if (ofid) 7575643135aSVenkateswararao Jujjuri (JV) p9_client_clunk(ofid); 7585643135aSVenkateswararao Jujjuri (JV) if (fid) 7595643135aSVenkateswararao Jujjuri (JV) p9_client_clunk(fid); 7605643135aSVenkateswararao Jujjuri (JV) return err; 7615643135aSVenkateswararao Jujjuri (JV) } 7625643135aSVenkateswararao Jujjuri (JV) 7635643135aSVenkateswararao Jujjuri (JV) /** 7642bad8471SEric Van Hensbergen * v9fs_vfs_create - VFS hook to create files 765ee443996SEric Van Hensbergen * @dir: directory inode that is being created 7662bad8471SEric Van Hensbergen * @dentry: dentry that is being deleted 7676a3124a3SLatchesar Ionkov * @mode: create permissions 7682bad8471SEric Van Hensbergen * @nd: path information 7692bad8471SEric Van Hensbergen * 7702bad8471SEric Van Hensbergen */ 7712bad8471SEric Van Hensbergen 7722bad8471SEric Van Hensbergen static int 7736a3124a3SLatchesar Ionkov v9fs_vfs_create(struct inode *dir, struct dentry *dentry, int mode, 7742bad8471SEric Van Hensbergen struct nameidata *nd) 7752bad8471SEric Van Hensbergen { 7766a3124a3SLatchesar Ionkov int err; 777bd238fb4SLatchesar Ionkov u32 perm; 7786a3124a3SLatchesar Ionkov int flags; 7796a3124a3SLatchesar Ionkov struct v9fs_session_info *v9ses; 780bd238fb4SLatchesar Ionkov struct p9_fid *fid; 7816a3124a3SLatchesar Ionkov struct file *filp; 7826a3124a3SLatchesar Ionkov 783bd238fb4SLatchesar Ionkov err = 0; 784bd238fb4SLatchesar Ionkov fid = NULL; 7856a3124a3SLatchesar Ionkov v9ses = v9fs_inode2v9ses(dir); 786da977b2cSEric Van Hensbergen perm = unixmode2p9mode(v9ses, mode); 7876a3124a3SLatchesar Ionkov if (nd && nd->flags & LOOKUP_OPEN) 7886a3124a3SLatchesar Ionkov flags = nd->intent.open.flags - 1; 7896a3124a3SLatchesar Ionkov else 7906a3124a3SLatchesar Ionkov flags = O_RDWR; 7916a3124a3SLatchesar Ionkov 792bd238fb4SLatchesar Ionkov fid = v9fs_create(v9ses, dir, dentry, NULL, perm, 793dd6102fbSSripathi Kodi v9fs_uflags2omode(flags, 794dd6102fbSSripathi Kodi v9fs_proto_dotu(v9ses))); 795bd238fb4SLatchesar Ionkov if (IS_ERR(fid)) { 796bd238fb4SLatchesar Ionkov err = PTR_ERR(fid); 797bd238fb4SLatchesar Ionkov fid = NULL; 7986a3124a3SLatchesar Ionkov goto error; 7996a3124a3SLatchesar Ionkov } 8006a3124a3SLatchesar Ionkov 801bd238fb4SLatchesar Ionkov /* if we are opening a file, assign the open fid to the file */ 8026a3124a3SLatchesar Ionkov if (nd && nd->flags & LOOKUP_OPEN) { 8036a3124a3SLatchesar Ionkov filp = lookup_instantiate_filp(nd, dentry, v9fs_open_created); 8046a3124a3SLatchesar Ionkov if (IS_ERR(filp)) { 805bd238fb4SLatchesar Ionkov err = PTR_ERR(filp); 806bd238fb4SLatchesar Ionkov goto error; 8076a3124a3SLatchesar Ionkov } 8086a3124a3SLatchesar Ionkov 809bd238fb4SLatchesar Ionkov filp->private_data = fid; 810bd238fb4SLatchesar Ionkov } else 811bd238fb4SLatchesar Ionkov p9_client_clunk(fid); 8126a3124a3SLatchesar Ionkov 8136a3124a3SLatchesar Ionkov return 0; 8146a3124a3SLatchesar Ionkov 8156a3124a3SLatchesar Ionkov error: 816bd238fb4SLatchesar Ionkov if (fid) 817bd238fb4SLatchesar Ionkov p9_client_clunk(fid); 8186a3124a3SLatchesar Ionkov 8196a3124a3SLatchesar Ionkov return err; 8202bad8471SEric Van Hensbergen } 8212bad8471SEric Van Hensbergen 8222bad8471SEric Van Hensbergen /** 8232bad8471SEric Van Hensbergen * v9fs_vfs_mkdir - VFS mkdir hook to create a directory 824ee443996SEric Van Hensbergen * @dir: inode that is being unlinked 8252bad8471SEric Van Hensbergen * @dentry: dentry that is being unlinked 8262bad8471SEric Van Hensbergen * @mode: mode for new directory 8272bad8471SEric Van Hensbergen * 8282bad8471SEric Van Hensbergen */ 8292bad8471SEric Van Hensbergen 8306a3124a3SLatchesar Ionkov static int v9fs_vfs_mkdir(struct inode *dir, struct dentry *dentry, int mode) 8312bad8471SEric Van Hensbergen { 8326a3124a3SLatchesar Ionkov int err; 833bd238fb4SLatchesar Ionkov u32 perm; 8346a3124a3SLatchesar Ionkov struct v9fs_session_info *v9ses; 835bd238fb4SLatchesar Ionkov struct p9_fid *fid; 8366a3124a3SLatchesar Ionkov 837bd238fb4SLatchesar Ionkov P9_DPRINTK(P9_DEBUG_VFS, "name %s\n", dentry->d_name.name); 838bd238fb4SLatchesar Ionkov err = 0; 8396a3124a3SLatchesar Ionkov v9ses = v9fs_inode2v9ses(dir); 8406a3124a3SLatchesar Ionkov perm = unixmode2p9mode(v9ses, mode | S_IFDIR); 841bd238fb4SLatchesar Ionkov fid = v9fs_create(v9ses, dir, dentry, NULL, perm, P9_OREAD); 842bd238fb4SLatchesar Ionkov if (IS_ERR(fid)) { 843bd238fb4SLatchesar Ionkov err = PTR_ERR(fid); 844bd238fb4SLatchesar Ionkov fid = NULL; 8456a3124a3SLatchesar Ionkov } 8466a3124a3SLatchesar Ionkov 847bd238fb4SLatchesar Ionkov if (fid) 848bd238fb4SLatchesar Ionkov p9_client_clunk(fid); 8496a3124a3SLatchesar Ionkov 8506a3124a3SLatchesar Ionkov return err; 8512bad8471SEric Van Hensbergen } 8522bad8471SEric Van Hensbergen 85301a622bdSM. Mohan Kumar 85401a622bdSM. Mohan Kumar /** 85501a622bdSM. Mohan Kumar * v9fs_vfs_mkdir_dotl - VFS mkdir hook to create a directory 85601a622bdSM. Mohan Kumar * @dir: inode that is being unlinked 85701a622bdSM. Mohan Kumar * @dentry: dentry that is being unlinked 85801a622bdSM. Mohan Kumar * @mode: mode for new directory 85901a622bdSM. Mohan Kumar * 86001a622bdSM. Mohan Kumar */ 86101a622bdSM. Mohan Kumar 86201a622bdSM. Mohan Kumar static int v9fs_vfs_mkdir_dotl(struct inode *dir, struct dentry *dentry, 86301a622bdSM. Mohan Kumar int mode) 86401a622bdSM. Mohan Kumar { 86501a622bdSM. Mohan Kumar int err; 86601a622bdSM. Mohan Kumar struct v9fs_session_info *v9ses; 86701a622bdSM. Mohan Kumar struct p9_fid *fid = NULL, *dfid = NULL; 86801a622bdSM. Mohan Kumar gid_t gid; 86901a622bdSM. Mohan Kumar char *name; 87001a622bdSM. Mohan Kumar struct inode *inode; 87101a622bdSM. Mohan Kumar struct p9_qid qid; 87201a622bdSM. Mohan Kumar struct dentry *dir_dentry; 87301a622bdSM. Mohan Kumar 87401a622bdSM. Mohan Kumar P9_DPRINTK(P9_DEBUG_VFS, "name %s\n", dentry->d_name.name); 87501a622bdSM. Mohan Kumar err = 0; 87601a622bdSM. Mohan Kumar v9ses = v9fs_inode2v9ses(dir); 87701a622bdSM. Mohan Kumar 87801a622bdSM. Mohan Kumar mode |= S_IFDIR; 87901a622bdSM. Mohan Kumar dir_dentry = v9fs_dentry_from_dir_inode(dir); 88001a622bdSM. Mohan Kumar dfid = v9fs_fid_lookup(dir_dentry); 88101a622bdSM. Mohan Kumar if (IS_ERR(dfid)) { 88201a622bdSM. Mohan Kumar err = PTR_ERR(dfid); 88301a622bdSM. Mohan Kumar P9_DPRINTK(P9_DEBUG_VFS, "fid lookup failed %d\n", err); 88401a622bdSM. Mohan Kumar dfid = NULL; 88501a622bdSM. Mohan Kumar goto error; 88601a622bdSM. Mohan Kumar } 88701a622bdSM. Mohan Kumar 88801a622bdSM. Mohan Kumar gid = v9fs_get_fsgid_for_create(dir); 88901a622bdSM. Mohan Kumar if (gid < 0) { 89001a622bdSM. Mohan Kumar P9_DPRINTK(P9_DEBUG_VFS, "v9fs_get_fsgid_for_create failed\n"); 89101a622bdSM. Mohan Kumar goto error; 89201a622bdSM. Mohan Kumar } 89301a622bdSM. Mohan Kumar 89401a622bdSM. Mohan Kumar name = (char *) dentry->d_name.name; 89501a622bdSM. Mohan Kumar err = p9_client_mkdir_dotl(dfid, name, mode, gid, &qid); 89601a622bdSM. Mohan Kumar if (err < 0) 89701a622bdSM. Mohan Kumar goto error; 89801a622bdSM. Mohan Kumar 89901a622bdSM. Mohan Kumar /* instantiate inode and assign the unopened fid to the dentry */ 90001a622bdSM. Mohan Kumar if (v9ses->cache == CACHE_LOOSE || v9ses->cache == CACHE_FSCACHE) { 90101a622bdSM. Mohan Kumar fid = p9_client_walk(dfid, 1, &name, 1); 90201a622bdSM. Mohan Kumar if (IS_ERR(fid)) { 90301a622bdSM. Mohan Kumar err = PTR_ERR(fid); 90401a622bdSM. Mohan Kumar P9_DPRINTK(P9_DEBUG_VFS, "p9_client_walk failed %d\n", 90501a622bdSM. Mohan Kumar err); 90601a622bdSM. Mohan Kumar fid = NULL; 90701a622bdSM. Mohan Kumar goto error; 90801a622bdSM. Mohan Kumar } 90901a622bdSM. Mohan Kumar 91001a622bdSM. Mohan Kumar inode = v9fs_inode_from_fid(v9ses, fid, dir->i_sb); 91101a622bdSM. Mohan Kumar if (IS_ERR(inode)) { 91201a622bdSM. Mohan Kumar err = PTR_ERR(inode); 91301a622bdSM. Mohan Kumar P9_DPRINTK(P9_DEBUG_VFS, "inode creation failed %d\n", 91401a622bdSM. Mohan Kumar err); 91501a622bdSM. Mohan Kumar goto error; 91601a622bdSM. Mohan Kumar } 91701a622bdSM. Mohan Kumar dentry->d_op = &v9fs_cached_dentry_operations; 91801a622bdSM. Mohan Kumar d_instantiate(dentry, inode); 91901a622bdSM. Mohan Kumar err = v9fs_fid_add(dentry, fid); 92001a622bdSM. Mohan Kumar if (err < 0) 92101a622bdSM. Mohan Kumar goto error; 92201a622bdSM. Mohan Kumar fid = NULL; 92301a622bdSM. Mohan Kumar } 92401a622bdSM. Mohan Kumar error: 92501a622bdSM. Mohan Kumar if (fid) 92601a622bdSM. Mohan Kumar p9_client_clunk(fid); 92701a622bdSM. Mohan Kumar return err; 92801a622bdSM. Mohan Kumar } 92901a622bdSM. Mohan Kumar 9302bad8471SEric Van Hensbergen /** 9312bad8471SEric Van Hensbergen * v9fs_vfs_lookup - VFS lookup hook to "walk" to a new inode 9322bad8471SEric Van Hensbergen * @dir: inode that is being walked from 9332bad8471SEric Van Hensbergen * @dentry: dentry that is being walked to? 9342bad8471SEric Van Hensbergen * @nameidata: path data 9352bad8471SEric Van Hensbergen * 9362bad8471SEric Van Hensbergen */ 9372bad8471SEric Van Hensbergen 9382bad8471SEric Van Hensbergen static struct dentry *v9fs_vfs_lookup(struct inode *dir, struct dentry *dentry, 9392bad8471SEric Van Hensbergen struct nameidata *nameidata) 9402bad8471SEric Van Hensbergen { 9412bad8471SEric Van Hensbergen struct super_block *sb; 9422bad8471SEric Van Hensbergen struct v9fs_session_info *v9ses; 943bd238fb4SLatchesar Ionkov struct p9_fid *dfid, *fid; 9442bad8471SEric Van Hensbergen struct inode *inode; 945bd238fb4SLatchesar Ionkov char *name; 9462bad8471SEric Van Hensbergen int result = 0; 9472bad8471SEric Van Hensbergen 948bd238fb4SLatchesar Ionkov P9_DPRINTK(P9_DEBUG_VFS, "dir: %p dentry: (%s) %p nameidata: %p\n", 949731805b4SLatchesar Ionkov dir, dentry->d_name.name, dentry, nameidata); 9502bad8471SEric Van Hensbergen 95111e9b49bSSripathi Kodi if (dentry->d_name.len > NAME_MAX) 95211e9b49bSSripathi Kodi return ERR_PTR(-ENAMETOOLONG); 95311e9b49bSSripathi Kodi 9542bad8471SEric Van Hensbergen sb = dir->i_sb; 9552bad8471SEric Van Hensbergen v9ses = v9fs_inode2v9ses(dir); 956a534c8d1SAneesh Kumar K.V /* We can walk d_parent because we hold the dir->i_mutex */ 957bd238fb4SLatchesar Ionkov dfid = v9fs_fid_lookup(dentry->d_parent); 958bd238fb4SLatchesar Ionkov if (IS_ERR(dfid)) 959e231c2eeSDavid Howells return ERR_CAST(dfid); 9602bad8471SEric Van Hensbergen 961bd238fb4SLatchesar Ionkov name = (char *) dentry->d_name.name; 962bd238fb4SLatchesar Ionkov fid = p9_client_walk(dfid, 1, &name, 1); 963bd238fb4SLatchesar Ionkov if (IS_ERR(fid)) { 964bd238fb4SLatchesar Ionkov result = PTR_ERR(fid); 9652bad8471SEric Van Hensbergen if (result == -ENOENT) { 96685e0df24SAneesh Kumar K.V inode = NULL; 96785e0df24SAneesh Kumar K.V goto inst_out; 9682bad8471SEric Van Hensbergen } 9692bad8471SEric Van Hensbergen 970bd238fb4SLatchesar Ionkov return ERR_PTR(result); 9712bad8471SEric Van Hensbergen } 9722bad8471SEric Van Hensbergen 973bd238fb4SLatchesar Ionkov inode = v9fs_inode_from_fid(v9ses, fid, dir->i_sb); 974bd238fb4SLatchesar Ionkov if (IS_ERR(inode)) { 975bd238fb4SLatchesar Ionkov result = PTR_ERR(inode); 976bd238fb4SLatchesar Ionkov inode = NULL; 977bd238fb4SLatchesar Ionkov goto error; 9782bad8471SEric Van Hensbergen } 9792bad8471SEric Van Hensbergen 980bd238fb4SLatchesar Ionkov result = v9fs_fid_add(dentry, fid); 9816a3124a3SLatchesar Ionkov if (result < 0) 982bd238fb4SLatchesar Ionkov goto error; 9836a3124a3SLatchesar Ionkov 98485e0df24SAneesh Kumar K.V inst_out: 98585e0df24SAneesh Kumar K.V if (v9ses->cache) 986e03abc0cSEric Van Hensbergen dentry->d_op = &v9fs_cached_dentry_operations; 987e03abc0cSEric Van Hensbergen else 988e03abc0cSEric Van Hensbergen dentry->d_op = &v9fs_dentry_operations; 9892bad8471SEric Van Hensbergen 9902bad8471SEric Van Hensbergen d_add(dentry, inode); 9912bad8471SEric Van Hensbergen return NULL; 9922bad8471SEric Van Hensbergen 993bd238fb4SLatchesar Ionkov error: 994bd238fb4SLatchesar Ionkov p9_client_clunk(fid); 995da977b2cSEric Van Hensbergen 9962bad8471SEric Van Hensbergen return ERR_PTR(result); 9972bad8471SEric Van Hensbergen } 9982bad8471SEric Van Hensbergen 9992bad8471SEric Van Hensbergen /** 10002bad8471SEric Van Hensbergen * v9fs_vfs_unlink - VFS unlink hook to delete an inode 10012bad8471SEric Van Hensbergen * @i: inode that is being unlinked 100273c592b9SEric Van Hensbergen * @d: dentry that is being unlinked 10032bad8471SEric Van Hensbergen * 10042bad8471SEric Van Hensbergen */ 10052bad8471SEric Van Hensbergen 10062bad8471SEric Van Hensbergen static int v9fs_vfs_unlink(struct inode *i, struct dentry *d) 10072bad8471SEric Van Hensbergen { 10082bad8471SEric Van Hensbergen return v9fs_remove(i, d, 0); 10092bad8471SEric Van Hensbergen } 10102bad8471SEric Van Hensbergen 10112bad8471SEric Van Hensbergen /** 10122bad8471SEric Van Hensbergen * v9fs_vfs_rmdir - VFS unlink hook to delete a directory 10132bad8471SEric Van Hensbergen * @i: inode that is being unlinked 101473c592b9SEric Van Hensbergen * @d: dentry that is being unlinked 10152bad8471SEric Van Hensbergen * 10162bad8471SEric Van Hensbergen */ 10172bad8471SEric Van Hensbergen 10182bad8471SEric Van Hensbergen static int v9fs_vfs_rmdir(struct inode *i, struct dentry *d) 10192bad8471SEric Van Hensbergen { 10202bad8471SEric Van Hensbergen return v9fs_remove(i, d, 1); 10212bad8471SEric Van Hensbergen } 10222bad8471SEric Van Hensbergen 10232bad8471SEric Van Hensbergen /** 10242bad8471SEric Van Hensbergen * v9fs_vfs_rename - VFS hook to rename an inode 10252bad8471SEric Van Hensbergen * @old_dir: old dir inode 10262bad8471SEric Van Hensbergen * @old_dentry: old dentry 10272bad8471SEric Van Hensbergen * @new_dir: new dir inode 10282bad8471SEric Van Hensbergen * @new_dentry: new dentry 10292bad8471SEric Van Hensbergen * 10302bad8471SEric Van Hensbergen */ 10312bad8471SEric Van Hensbergen 10322bad8471SEric Van Hensbergen static int 10332bad8471SEric Van Hensbergen v9fs_vfs_rename(struct inode *old_dir, struct dentry *old_dentry, 10342bad8471SEric Van Hensbergen struct inode *new_dir, struct dentry *new_dentry) 10352bad8471SEric Van Hensbergen { 1036bd238fb4SLatchesar Ionkov struct inode *old_inode; 1037bd238fb4SLatchesar Ionkov struct v9fs_session_info *v9ses; 1038bd238fb4SLatchesar Ionkov struct p9_fid *oldfid; 1039bd238fb4SLatchesar Ionkov struct p9_fid *olddirfid; 1040bd238fb4SLatchesar Ionkov struct p9_fid *newdirfid; 1041bd238fb4SLatchesar Ionkov struct p9_wstat wstat; 1042bd238fb4SLatchesar Ionkov int retval; 10432bad8471SEric Van Hensbergen 1044bd238fb4SLatchesar Ionkov P9_DPRINTK(P9_DEBUG_VFS, "\n"); 1045bd238fb4SLatchesar Ionkov retval = 0; 1046bd238fb4SLatchesar Ionkov old_inode = old_dentry->d_inode; 1047bd238fb4SLatchesar Ionkov v9ses = v9fs_inode2v9ses(old_inode); 1048bd238fb4SLatchesar Ionkov oldfid = v9fs_fid_lookup(old_dentry); 1049da977b2cSEric Van Hensbergen if (IS_ERR(oldfid)) 1050da977b2cSEric Van Hensbergen return PTR_ERR(oldfid); 1051da977b2cSEric Van Hensbergen 1052da977b2cSEric Van Hensbergen olddirfid = v9fs_fid_clone(old_dentry->d_parent); 1053da977b2cSEric Van Hensbergen if (IS_ERR(olddirfid)) { 1054da977b2cSEric Van Hensbergen retval = PTR_ERR(olddirfid); 1055bd238fb4SLatchesar Ionkov goto done; 1056da977b2cSEric Van Hensbergen } 1057da977b2cSEric Van Hensbergen 1058da977b2cSEric Van Hensbergen newdirfid = v9fs_fid_clone(new_dentry->d_parent); 1059da977b2cSEric Van Hensbergen if (IS_ERR(newdirfid)) { 1060da977b2cSEric Van Hensbergen retval = PTR_ERR(newdirfid); 1061bd238fb4SLatchesar Ionkov goto clunk_olddir; 10622bad8471SEric Van Hensbergen } 10632bad8471SEric Van Hensbergen 1064a534c8d1SAneesh Kumar K.V down_write(&v9ses->rename_sem); 10654681dbdaSSripathi Kodi if (v9fs_proto_dotl(v9ses)) { 10664681dbdaSSripathi Kodi retval = p9_client_rename(oldfid, newdirfid, 10674681dbdaSSripathi Kodi (char *) new_dentry->d_name.name); 10684681dbdaSSripathi Kodi if (retval != -ENOSYS) 10694681dbdaSSripathi Kodi goto clunk_newdir; 10704681dbdaSSripathi Kodi } 1071a534c8d1SAneesh Kumar K.V if (old_dentry->d_parent != new_dentry->d_parent) { 1072a534c8d1SAneesh Kumar K.V /* 1073a534c8d1SAneesh Kumar K.V * 9P .u can only handle file rename in the same directory 1074a534c8d1SAneesh Kumar K.V */ 10754681dbdaSSripathi Kodi 1076bd238fb4SLatchesar Ionkov P9_DPRINTK(P9_DEBUG_ERROR, 1077bd238fb4SLatchesar Ionkov "old dir and new dir are different\n"); 1078621997cdSEric Van Hensbergen retval = -EXDEV; 1079bd238fb4SLatchesar Ionkov goto clunk_newdir; 10802bad8471SEric Van Hensbergen } 1081531b1094SLatchesar Ionkov v9fs_blank_wstat(&wstat); 1082ba17674fSLatchesar Ionkov wstat.muid = v9ses->uname; 1083531b1094SLatchesar Ionkov wstat.name = (char *) new_dentry->d_name.name; 1084bd238fb4SLatchesar Ionkov retval = p9_client_wstat(oldfid, &wstat); 10852bad8471SEric Van Hensbergen 1086bd238fb4SLatchesar Ionkov clunk_newdir: 1087a534c8d1SAneesh Kumar K.V if (!retval) 1088a534c8d1SAneesh Kumar K.V /* successful rename */ 1089a534c8d1SAneesh Kumar K.V d_move(old_dentry, new_dentry); 1090a534c8d1SAneesh Kumar K.V up_write(&v9ses->rename_sem); 109122150c4fSLatchesar Ionkov p9_client_clunk(newdirfid); 10922bad8471SEric Van Hensbergen 1093bd238fb4SLatchesar Ionkov clunk_olddir: 109422150c4fSLatchesar Ionkov p9_client_clunk(olddirfid); 10952bad8471SEric Van Hensbergen 1096bd238fb4SLatchesar Ionkov done: 10972bad8471SEric Van Hensbergen return retval; 10982bad8471SEric Van Hensbergen } 10992bad8471SEric Van Hensbergen 11002bad8471SEric Van Hensbergen /** 1101943ffb58SAdrian Bunk * v9fs_vfs_getattr - retrieve file metadata 1102ee443996SEric Van Hensbergen * @mnt: mount information 1103ee443996SEric Van Hensbergen * @dentry: file to get attributes on 1104ee443996SEric Van Hensbergen * @stat: metadata structure to populate 11052bad8471SEric Van Hensbergen * 11062bad8471SEric Van Hensbergen */ 11072bad8471SEric Van Hensbergen 11082bad8471SEric Van Hensbergen static int 11092bad8471SEric Van Hensbergen v9fs_vfs_getattr(struct vfsmount *mnt, struct dentry *dentry, 11102bad8471SEric Van Hensbergen struct kstat *stat) 11112bad8471SEric Van Hensbergen { 1112bd238fb4SLatchesar Ionkov int err; 1113bd238fb4SLatchesar Ionkov struct v9fs_session_info *v9ses; 1114bd238fb4SLatchesar Ionkov struct p9_fid *fid; 111551a87c55SEric Van Hensbergen struct p9_wstat *st; 11162bad8471SEric Van Hensbergen 1117bd238fb4SLatchesar Ionkov P9_DPRINTK(P9_DEBUG_VFS, "dentry: %p\n", dentry); 1118bd238fb4SLatchesar Ionkov err = -EPERM; 1119bd238fb4SLatchesar Ionkov v9ses = v9fs_inode2v9ses(dentry->d_inode); 112060e78d2cSAbhishek Kulkarni if (v9ses->cache == CACHE_LOOSE || v9ses->cache == CACHE_FSCACHE) 11219523a841SEric Van Hensbergen return simple_getattr(mnt, dentry, stat); 11229523a841SEric Van Hensbergen 1123bd238fb4SLatchesar Ionkov fid = v9fs_fid_lookup(dentry); 1124da977b2cSEric Van Hensbergen if (IS_ERR(fid)) 1125da977b2cSEric Van Hensbergen return PTR_ERR(fid); 11262bad8471SEric Van Hensbergen 1127bd238fb4SLatchesar Ionkov st = p9_client_stat(fid); 1128bd238fb4SLatchesar Ionkov if (IS_ERR(st)) 1129bd238fb4SLatchesar Ionkov return PTR_ERR(st); 11302bad8471SEric Van Hensbergen 1131bd238fb4SLatchesar Ionkov v9fs_stat2inode(st, dentry->d_inode, dentry->d_inode->i_sb); 11322bad8471SEric Van Hensbergen generic_fillattr(dentry->d_inode, stat); 11332bad8471SEric Van Hensbergen 113462b2be59SLatchesar Ionkov p9stat_free(st); 1135bd238fb4SLatchesar Ionkov kfree(st); 1136bd238fb4SLatchesar Ionkov return 0; 11372bad8471SEric Van Hensbergen } 11382bad8471SEric Van Hensbergen 1139f0853122SSripathi Kodi static int 1140f0853122SSripathi Kodi v9fs_vfs_getattr_dotl(struct vfsmount *mnt, struct dentry *dentry, 1141f0853122SSripathi Kodi struct kstat *stat) 1142f0853122SSripathi Kodi { 1143f0853122SSripathi Kodi int err; 1144f0853122SSripathi Kodi struct v9fs_session_info *v9ses; 1145f0853122SSripathi Kodi struct p9_fid *fid; 1146f0853122SSripathi Kodi struct p9_stat_dotl *st; 1147f0853122SSripathi Kodi 1148f0853122SSripathi Kodi P9_DPRINTK(P9_DEBUG_VFS, "dentry: %p\n", dentry); 1149f0853122SSripathi Kodi err = -EPERM; 1150f0853122SSripathi Kodi v9ses = v9fs_inode2v9ses(dentry->d_inode); 1151f0853122SSripathi Kodi if (v9ses->cache == CACHE_LOOSE || v9ses->cache == CACHE_FSCACHE) 1152f0853122SSripathi Kodi return simple_getattr(mnt, dentry, stat); 1153f0853122SSripathi Kodi 1154f0853122SSripathi Kodi fid = v9fs_fid_lookup(dentry); 1155f0853122SSripathi Kodi if (IS_ERR(fid)) 1156f0853122SSripathi Kodi return PTR_ERR(fid); 1157f0853122SSripathi Kodi 1158f0853122SSripathi Kodi /* Ask for all the fields in stat structure. Server will return 1159f0853122SSripathi Kodi * whatever it supports 1160f0853122SSripathi Kodi */ 1161f0853122SSripathi Kodi 1162f0853122SSripathi Kodi st = p9_client_getattr_dotl(fid, P9_STATS_ALL); 1163f0853122SSripathi Kodi if (IS_ERR(st)) 1164f0853122SSripathi Kodi return PTR_ERR(st); 1165f0853122SSripathi Kodi 1166f0853122SSripathi Kodi v9fs_stat2inode_dotl(st, dentry->d_inode); 1167f0853122SSripathi Kodi generic_fillattr(dentry->d_inode, stat); 1168f0853122SSripathi Kodi /* Change block size to what the server returned */ 1169f0853122SSripathi Kodi stat->blksize = st->st_blksize; 1170f0853122SSripathi Kodi 1171f0853122SSripathi Kodi kfree(st); 1172f0853122SSripathi Kodi return 0; 1173f0853122SSripathi Kodi } 1174f0853122SSripathi Kodi 11752bad8471SEric Van Hensbergen /** 11762bad8471SEric Van Hensbergen * v9fs_vfs_setattr - set file metadata 11772bad8471SEric Van Hensbergen * @dentry: file whose metadata to set 11782bad8471SEric Van Hensbergen * @iattr: metadata assignment structure 11792bad8471SEric Van Hensbergen * 11802bad8471SEric Van Hensbergen */ 11812bad8471SEric Van Hensbergen 11822bad8471SEric Van Hensbergen static int v9fs_vfs_setattr(struct dentry *dentry, struct iattr *iattr) 11832bad8471SEric Van Hensbergen { 1184bd238fb4SLatchesar Ionkov int retval; 1185bd238fb4SLatchesar Ionkov struct v9fs_session_info *v9ses; 1186bd238fb4SLatchesar Ionkov struct p9_fid *fid; 1187bd238fb4SLatchesar Ionkov struct p9_wstat wstat; 11882bad8471SEric Van Hensbergen 1189bd238fb4SLatchesar Ionkov P9_DPRINTK(P9_DEBUG_VFS, "\n"); 1190bd238fb4SLatchesar Ionkov retval = -EPERM; 1191bd238fb4SLatchesar Ionkov v9ses = v9fs_inode2v9ses(dentry->d_inode); 1192bd238fb4SLatchesar Ionkov fid = v9fs_fid_lookup(dentry); 1193da977b2cSEric Van Hensbergen if(IS_ERR(fid)) 1194da977b2cSEric Van Hensbergen return PTR_ERR(fid); 11952bad8471SEric Van Hensbergen 1196531b1094SLatchesar Ionkov v9fs_blank_wstat(&wstat); 11972bad8471SEric Van Hensbergen if (iattr->ia_valid & ATTR_MODE) 1198531b1094SLatchesar Ionkov wstat.mode = unixmode2p9mode(v9ses, iattr->ia_mode); 11992bad8471SEric Van Hensbergen 12002bad8471SEric Van Hensbergen if (iattr->ia_valid & ATTR_MTIME) 1201531b1094SLatchesar Ionkov wstat.mtime = iattr->ia_mtime.tv_sec; 12022bad8471SEric Van Hensbergen 12032bad8471SEric Van Hensbergen if (iattr->ia_valid & ATTR_ATIME) 1204531b1094SLatchesar Ionkov wstat.atime = iattr->ia_atime.tv_sec; 12052bad8471SEric Van Hensbergen 12062bad8471SEric Van Hensbergen if (iattr->ia_valid & ATTR_SIZE) 1207531b1094SLatchesar Ionkov wstat.length = iattr->ia_size; 12082bad8471SEric Van Hensbergen 1209dd6102fbSSripathi Kodi if (v9fs_proto_dotu(v9ses)) { 1210531b1094SLatchesar Ionkov if (iattr->ia_valid & ATTR_UID) 1211531b1094SLatchesar Ionkov wstat.n_uid = iattr->ia_uid; 12122bad8471SEric Van Hensbergen 1213531b1094SLatchesar Ionkov if (iattr->ia_valid & ATTR_GID) 1214531b1094SLatchesar Ionkov wstat.n_gid = iattr->ia_gid; 12152bad8471SEric Van Hensbergen } 12162bad8471SEric Van Hensbergen 1217bd238fb4SLatchesar Ionkov retval = p9_client_wstat(fid, &wstat); 12181025774cSChristoph Hellwig if (retval < 0) 1219bd238fb4SLatchesar Ionkov return retval; 12201025774cSChristoph Hellwig 12211025774cSChristoph Hellwig if ((iattr->ia_valid & ATTR_SIZE) && 12221025774cSChristoph Hellwig iattr->ia_size != i_size_read(dentry->d_inode)) { 12231025774cSChristoph Hellwig retval = vmtruncate(dentry->d_inode, iattr->ia_size); 12241025774cSChristoph Hellwig if (retval) 12251025774cSChristoph Hellwig return retval; 12261025774cSChristoph Hellwig } 12271025774cSChristoph Hellwig 12281025774cSChristoph Hellwig setattr_copy(dentry->d_inode, iattr); 12291025774cSChristoph Hellwig mark_inode_dirty(dentry->d_inode); 12301025774cSChristoph Hellwig return 0; 12312bad8471SEric Van Hensbergen } 12322bad8471SEric Van Hensbergen 12332bad8471SEric Van Hensbergen /** 123487d7845aSSripathi Kodi * v9fs_vfs_setattr_dotl - set file metadata 123587d7845aSSripathi Kodi * @dentry: file whose metadata to set 123687d7845aSSripathi Kodi * @iattr: metadata assignment structure 123787d7845aSSripathi Kodi * 123887d7845aSSripathi Kodi */ 123987d7845aSSripathi Kodi 124087d7845aSSripathi Kodi static int v9fs_vfs_setattr_dotl(struct dentry *dentry, struct iattr *iattr) 124187d7845aSSripathi Kodi { 124287d7845aSSripathi Kodi int retval; 124387d7845aSSripathi Kodi struct v9fs_session_info *v9ses; 124487d7845aSSripathi Kodi struct p9_fid *fid; 124587d7845aSSripathi Kodi struct p9_iattr_dotl p9attr; 124687d7845aSSripathi Kodi 124787d7845aSSripathi Kodi P9_DPRINTK(P9_DEBUG_VFS, "\n"); 124887d7845aSSripathi Kodi 124987d7845aSSripathi Kodi retval = inode_change_ok(dentry->d_inode, iattr); 125087d7845aSSripathi Kodi if (retval) 125187d7845aSSripathi Kodi return retval; 125287d7845aSSripathi Kodi 125387d7845aSSripathi Kodi p9attr.valid = iattr->ia_valid; 125487d7845aSSripathi Kodi p9attr.mode = iattr->ia_mode; 125587d7845aSSripathi Kodi p9attr.uid = iattr->ia_uid; 125687d7845aSSripathi Kodi p9attr.gid = iattr->ia_gid; 125787d7845aSSripathi Kodi p9attr.size = iattr->ia_size; 125887d7845aSSripathi Kodi p9attr.atime_sec = iattr->ia_atime.tv_sec; 125987d7845aSSripathi Kodi p9attr.atime_nsec = iattr->ia_atime.tv_nsec; 126087d7845aSSripathi Kodi p9attr.mtime_sec = iattr->ia_mtime.tv_sec; 126187d7845aSSripathi Kodi p9attr.mtime_nsec = iattr->ia_mtime.tv_nsec; 126287d7845aSSripathi Kodi 126387d7845aSSripathi Kodi retval = -EPERM; 126487d7845aSSripathi Kodi v9ses = v9fs_inode2v9ses(dentry->d_inode); 126587d7845aSSripathi Kodi fid = v9fs_fid_lookup(dentry); 126687d7845aSSripathi Kodi if (IS_ERR(fid)) 126787d7845aSSripathi Kodi return PTR_ERR(fid); 126887d7845aSSripathi Kodi 126987d7845aSSripathi Kodi retval = p9_client_setattr(fid, &p9attr); 12708cef9c67SStephen Rothwell if (retval < 0) 127187d7845aSSripathi Kodi return retval; 12728cef9c67SStephen Rothwell 12738cef9c67SStephen Rothwell if ((iattr->ia_valid & ATTR_SIZE) && 12748cef9c67SStephen Rothwell iattr->ia_size != i_size_read(dentry->d_inode)) { 12758cef9c67SStephen Rothwell retval = vmtruncate(dentry->d_inode, iattr->ia_size); 12768cef9c67SStephen Rothwell if (retval) 12778cef9c67SStephen Rothwell return retval; 12788cef9c67SStephen Rothwell } 12798cef9c67SStephen Rothwell 12808cef9c67SStephen Rothwell setattr_copy(dentry->d_inode, iattr); 12818cef9c67SStephen Rothwell mark_inode_dirty(dentry->d_inode); 12828cef9c67SStephen Rothwell return 0; 128387d7845aSSripathi Kodi } 128487d7845aSSripathi Kodi 128587d7845aSSripathi Kodi /** 1286531b1094SLatchesar Ionkov * v9fs_stat2inode - populate an inode structure with mistat info 1287531b1094SLatchesar Ionkov * @stat: Plan 9 metadata (mistat) structure 12882bad8471SEric Van Hensbergen * @inode: inode to populate 12892bad8471SEric Van Hensbergen * @sb: superblock of filesystem 12902bad8471SEric Van Hensbergen * 12912bad8471SEric Van Hensbergen */ 12922bad8471SEric Van Hensbergen 12932bad8471SEric Van Hensbergen void 129451a87c55SEric Van Hensbergen v9fs_stat2inode(struct p9_wstat *stat, struct inode *inode, 12952bad8471SEric Van Hensbergen struct super_block *sb) 12962bad8471SEric Van Hensbergen { 1297531b1094SLatchesar Ionkov char ext[32]; 12985717144aSAneesh Kumar K.V char tag_name[14]; 12995717144aSAneesh Kumar K.V unsigned int i_nlink; 13002bad8471SEric Van Hensbergen struct v9fs_session_info *v9ses = sb->s_fs_info; 13012bad8471SEric Van Hensbergen 13022bad8471SEric Van Hensbergen inode->i_nlink = 1; 13032bad8471SEric Van Hensbergen 1304531b1094SLatchesar Ionkov inode->i_atime.tv_sec = stat->atime; 1305531b1094SLatchesar Ionkov inode->i_mtime.tv_sec = stat->mtime; 1306531b1094SLatchesar Ionkov inode->i_ctime.tv_sec = stat->mtime; 13072bad8471SEric Van Hensbergen 1308bd32b82dSLatchesar Ionkov inode->i_uid = v9ses->dfltuid; 1309bd32b82dSLatchesar Ionkov inode->i_gid = v9ses->dfltgid; 13102bad8471SEric Van Hensbergen 1311dd6102fbSSripathi Kodi if (v9fs_proto_dotu(v9ses)) { 1312531b1094SLatchesar Ionkov inode->i_uid = stat->n_uid; 1313531b1094SLatchesar Ionkov inode->i_gid = stat->n_gid; 1314531b1094SLatchesar Ionkov } 13155717144aSAneesh Kumar K.V if ((S_ISREG(inode->i_mode)) || (S_ISDIR(inode->i_mode))) { 13165717144aSAneesh Kumar K.V if (v9fs_proto_dotu(v9ses) && (stat->extension[0] != '\0')) { 13175717144aSAneesh Kumar K.V /* 13185717144aSAneesh Kumar K.V * Hadlink support got added later to 13195717144aSAneesh Kumar K.V * to the .u extension. So there can be 13205717144aSAneesh Kumar K.V * server out there that doesn't support 13215717144aSAneesh Kumar K.V * this even with .u extension. So check 13225717144aSAneesh Kumar K.V * for non NULL stat->extension 13235717144aSAneesh Kumar K.V */ 13245717144aSAneesh Kumar K.V strncpy(ext, stat->extension, sizeof(ext)); 13255717144aSAneesh Kumar K.V /* HARDLINKCOUNT %u */ 13265717144aSAneesh Kumar K.V sscanf(ext, "%13s %u", tag_name, &i_nlink); 13275717144aSAneesh Kumar K.V if (!strncmp(tag_name, "HARDLINKCOUNT", 13)) 13285717144aSAneesh Kumar K.V inode->i_nlink = i_nlink; 13295717144aSAneesh Kumar K.V } 13305717144aSAneesh Kumar K.V } 1331531b1094SLatchesar Ionkov inode->i_mode = p9mode2unixmode(v9ses, stat->mode); 13322bad8471SEric Van Hensbergen if ((S_ISBLK(inode->i_mode)) || (S_ISCHR(inode->i_mode))) { 13332bad8471SEric Van Hensbergen char type = 0; 13342bad8471SEric Van Hensbergen int major = -1; 13352bad8471SEric Van Hensbergen int minor = -1; 1336531b1094SLatchesar Ionkov 133751a87c55SEric Van Hensbergen strncpy(ext, stat->extension, sizeof(ext)); 1338531b1094SLatchesar Ionkov sscanf(ext, "%c %u %u", &type, &major, &minor); 13392bad8471SEric Van Hensbergen switch (type) { 13402bad8471SEric Van Hensbergen case 'c': 13412bad8471SEric Van Hensbergen inode->i_mode &= ~S_IFBLK; 13422bad8471SEric Van Hensbergen inode->i_mode |= S_IFCHR; 13432bad8471SEric Van Hensbergen break; 13442bad8471SEric Van Hensbergen case 'b': 13452bad8471SEric Van Hensbergen break; 13462bad8471SEric Van Hensbergen default: 1347bd238fb4SLatchesar Ionkov P9_DPRINTK(P9_DEBUG_ERROR, 134851a87c55SEric Van Hensbergen "Unknown special type %c %s\n", type, 134951a87c55SEric Van Hensbergen stat->extension); 13502bad8471SEric Van Hensbergen }; 13512bad8471SEric Van Hensbergen inode->i_rdev = MKDEV(major, minor); 135257c7b4e6SMagnus Deininger init_special_inode(inode, inode->i_mode, inode->i_rdev); 13532bad8471SEric Van Hensbergen } else 13542bad8471SEric Van Hensbergen inode->i_rdev = 0; 13552bad8471SEric Van Hensbergen 13567549ae3eSAbhishek Kulkarni i_size_write(inode, stat->length); 13572bad8471SEric Van Hensbergen 1358bd238fb4SLatchesar Ionkov /* not real number of blocks, but 512 byte ones ... */ 13597549ae3eSAbhishek Kulkarni inode->i_blocks = (i_size_read(inode) + 512 - 1) >> 9; 13602bad8471SEric Van Hensbergen } 13612bad8471SEric Van Hensbergen 13622bad8471SEric Van Hensbergen /** 1363f0853122SSripathi Kodi * v9fs_stat2inode_dotl - populate an inode structure with stat info 1364f0853122SSripathi Kodi * @stat: stat structure 1365f0853122SSripathi Kodi * @inode: inode to populate 1366f0853122SSripathi Kodi * @sb: superblock of filesystem 1367f0853122SSripathi Kodi * 1368f0853122SSripathi Kodi */ 1369f0853122SSripathi Kodi 1370f0853122SSripathi Kodi void 1371f0853122SSripathi Kodi v9fs_stat2inode_dotl(struct p9_stat_dotl *stat, struct inode *inode) 1372f0853122SSripathi Kodi { 1373f0853122SSripathi Kodi 1374f0853122SSripathi Kodi if ((stat->st_result_mask & P9_STATS_BASIC) == P9_STATS_BASIC) { 1375f0853122SSripathi Kodi inode->i_atime.tv_sec = stat->st_atime_sec; 1376f0853122SSripathi Kodi inode->i_atime.tv_nsec = stat->st_atime_nsec; 1377f0853122SSripathi Kodi inode->i_mtime.tv_sec = stat->st_mtime_sec; 1378f0853122SSripathi Kodi inode->i_mtime.tv_nsec = stat->st_mtime_nsec; 1379f0853122SSripathi Kodi inode->i_ctime.tv_sec = stat->st_ctime_sec; 1380f0853122SSripathi Kodi inode->i_ctime.tv_nsec = stat->st_ctime_nsec; 1381f0853122SSripathi Kodi inode->i_uid = stat->st_uid; 1382f0853122SSripathi Kodi inode->i_gid = stat->st_gid; 1383f0853122SSripathi Kodi inode->i_nlink = stat->st_nlink; 1384f0853122SSripathi Kodi inode->i_mode = stat->st_mode; 1385f0853122SSripathi Kodi inode->i_rdev = new_decode_dev(stat->st_rdev); 1386f0853122SSripathi Kodi 1387f0853122SSripathi Kodi if ((S_ISBLK(inode->i_mode)) || (S_ISCHR(inode->i_mode))) 1388f0853122SSripathi Kodi init_special_inode(inode, inode->i_mode, inode->i_rdev); 1389f0853122SSripathi Kodi 1390f0853122SSripathi Kodi i_size_write(inode, stat->st_size); 1391f0853122SSripathi Kodi inode->i_blocks = stat->st_blocks; 1392f0853122SSripathi Kodi } else { 1393f0853122SSripathi Kodi if (stat->st_result_mask & P9_STATS_ATIME) { 1394f0853122SSripathi Kodi inode->i_atime.tv_sec = stat->st_atime_sec; 1395f0853122SSripathi Kodi inode->i_atime.tv_nsec = stat->st_atime_nsec; 1396f0853122SSripathi Kodi } 1397f0853122SSripathi Kodi if (stat->st_result_mask & P9_STATS_MTIME) { 1398f0853122SSripathi Kodi inode->i_mtime.tv_sec = stat->st_mtime_sec; 1399f0853122SSripathi Kodi inode->i_mtime.tv_nsec = stat->st_mtime_nsec; 1400f0853122SSripathi Kodi } 1401f0853122SSripathi Kodi if (stat->st_result_mask & P9_STATS_CTIME) { 1402f0853122SSripathi Kodi inode->i_ctime.tv_sec = stat->st_ctime_sec; 1403f0853122SSripathi Kodi inode->i_ctime.tv_nsec = stat->st_ctime_nsec; 1404f0853122SSripathi Kodi } 1405f0853122SSripathi Kodi if (stat->st_result_mask & P9_STATS_UID) 1406f0853122SSripathi Kodi inode->i_uid = stat->st_uid; 1407f0853122SSripathi Kodi if (stat->st_result_mask & P9_STATS_GID) 1408f0853122SSripathi Kodi inode->i_gid = stat->st_gid; 1409f0853122SSripathi Kodi if (stat->st_result_mask & P9_STATS_NLINK) 1410f0853122SSripathi Kodi inode->i_nlink = stat->st_nlink; 1411f0853122SSripathi Kodi if (stat->st_result_mask & P9_STATS_MODE) { 1412f0853122SSripathi Kodi inode->i_mode = stat->st_mode; 1413f0853122SSripathi Kodi if ((S_ISBLK(inode->i_mode)) || 1414f0853122SSripathi Kodi (S_ISCHR(inode->i_mode))) 1415f0853122SSripathi Kodi init_special_inode(inode, inode->i_mode, 1416f0853122SSripathi Kodi inode->i_rdev); 1417f0853122SSripathi Kodi } 1418f0853122SSripathi Kodi if (stat->st_result_mask & P9_STATS_RDEV) 1419f0853122SSripathi Kodi inode->i_rdev = new_decode_dev(stat->st_rdev); 1420f0853122SSripathi Kodi if (stat->st_result_mask & P9_STATS_SIZE) 1421f0853122SSripathi Kodi i_size_write(inode, stat->st_size); 1422f0853122SSripathi Kodi if (stat->st_result_mask & P9_STATS_BLOCKS) 1423f0853122SSripathi Kodi inode->i_blocks = stat->st_blocks; 1424f0853122SSripathi Kodi } 1425f0853122SSripathi Kodi if (stat->st_result_mask & P9_STATS_GEN) 1426f0853122SSripathi Kodi inode->i_generation = stat->st_gen; 1427f0853122SSripathi Kodi 1428f0853122SSripathi Kodi /* Currently we don't support P9_STATS_BTIME and P9_STATS_DATA_VERSION 1429f0853122SSripathi Kodi * because the inode structure does not have fields for them. 1430f0853122SSripathi Kodi */ 1431f0853122SSripathi Kodi } 1432f0853122SSripathi Kodi 1433f0853122SSripathi Kodi /** 14342bad8471SEric Van Hensbergen * v9fs_qid2ino - convert qid into inode number 14352bad8471SEric Van Hensbergen * @qid: qid to hash 14362bad8471SEric Van Hensbergen * 14372bad8471SEric Van Hensbergen * BUG: potential for inode number collisions? 14382bad8471SEric Van Hensbergen */ 14392bad8471SEric Van Hensbergen 1440bd238fb4SLatchesar Ionkov ino_t v9fs_qid2ino(struct p9_qid *qid) 14412bad8471SEric Van Hensbergen { 14422bad8471SEric Van Hensbergen u64 path = qid->path + 2; 14432bad8471SEric Van Hensbergen ino_t i = 0; 14442bad8471SEric Van Hensbergen 14452bad8471SEric Van Hensbergen if (sizeof(ino_t) == sizeof(path)) 14462bad8471SEric Van Hensbergen memcpy(&i, &path, sizeof(ino_t)); 14472bad8471SEric Van Hensbergen else 14482bad8471SEric Van Hensbergen i = (ino_t) (path ^ (path >> 32)); 14492bad8471SEric Van Hensbergen 14502bad8471SEric Van Hensbergen return i; 14512bad8471SEric Van Hensbergen } 14522bad8471SEric Van Hensbergen 14532bad8471SEric Van Hensbergen /** 14542bad8471SEric Van Hensbergen * v9fs_readlink - read a symlink's location (internal version) 14552bad8471SEric Van Hensbergen * @dentry: dentry for symlink 145673c592b9SEric Van Hensbergen * @buffer: buffer to load symlink location into 14572bad8471SEric Van Hensbergen * @buflen: length of buffer 14582bad8471SEric Van Hensbergen * 14592bad8471SEric Van Hensbergen */ 14602bad8471SEric Van Hensbergen 14612bad8471SEric Van Hensbergen static int v9fs_readlink(struct dentry *dentry, char *buffer, int buflen) 14622bad8471SEric Van Hensbergen { 1463bd238fb4SLatchesar Ionkov int retval; 14642bad8471SEric Van Hensbergen 1465bd238fb4SLatchesar Ionkov struct v9fs_session_info *v9ses; 1466bd238fb4SLatchesar Ionkov struct p9_fid *fid; 146751a87c55SEric Van Hensbergen struct p9_wstat *st; 14682bad8471SEric Van Hensbergen 1469bd238fb4SLatchesar Ionkov P9_DPRINTK(P9_DEBUG_VFS, " %s\n", dentry->d_name.name); 1470bd238fb4SLatchesar Ionkov retval = -EPERM; 1471bd238fb4SLatchesar Ionkov v9ses = v9fs_inode2v9ses(dentry->d_inode); 1472bd238fb4SLatchesar Ionkov fid = v9fs_fid_lookup(dentry); 1473da977b2cSEric Van Hensbergen if (IS_ERR(fid)) 1474da977b2cSEric Van Hensbergen return PTR_ERR(fid); 14752bad8471SEric Van Hensbergen 147650cc42ffSVenkateswararao Jujjuri (JV) if (!v9fs_proto_dotu(v9ses) && !v9fs_proto_dotl(v9ses)) 1477bd238fb4SLatchesar Ionkov return -EBADF; 14782bad8471SEric Van Hensbergen 1479bd238fb4SLatchesar Ionkov st = p9_client_stat(fid); 1480bd238fb4SLatchesar Ionkov if (IS_ERR(st)) 1481bd238fb4SLatchesar Ionkov return PTR_ERR(st); 14822bad8471SEric Van Hensbergen 1483bd238fb4SLatchesar Ionkov if (!(st->mode & P9_DMSYMLINK)) { 14842bad8471SEric Van Hensbergen retval = -EINVAL; 1485bd238fb4SLatchesar Ionkov goto done; 14862bad8471SEric Van Hensbergen } 14872bad8471SEric Van Hensbergen 14882bad8471SEric Van Hensbergen /* copy extension buffer into buffer */ 148951a87c55SEric Van Hensbergen strncpy(buffer, st->extension, buflen); 14902bad8471SEric Van Hensbergen 1491bd238fb4SLatchesar Ionkov P9_DPRINTK(P9_DEBUG_VFS, 149251a87c55SEric Van Hensbergen "%s -> %s (%s)\n", dentry->d_name.name, st->extension, buffer); 1493bd238fb4SLatchesar Ionkov 14942511cd0bSMartin Stava retval = strnlen(buffer, buflen); 1495bd238fb4SLatchesar Ionkov done: 149662b2be59SLatchesar Ionkov p9stat_free(st); 1497bd238fb4SLatchesar Ionkov kfree(st); 14982bad8471SEric Van Hensbergen return retval; 14992bad8471SEric Van Hensbergen } 15002bad8471SEric Van Hensbergen 15012bad8471SEric Van Hensbergen /** 15022bad8471SEric Van Hensbergen * v9fs_vfs_follow_link - follow a symlink path 15032bad8471SEric Van Hensbergen * @dentry: dentry for symlink 15042bad8471SEric Van Hensbergen * @nd: nameidata 15052bad8471SEric Van Hensbergen * 15062bad8471SEric Van Hensbergen */ 15072bad8471SEric Van Hensbergen 15082bad8471SEric Van Hensbergen static void *v9fs_vfs_follow_link(struct dentry *dentry, struct nameidata *nd) 15092bad8471SEric Van Hensbergen { 15102bad8471SEric Van Hensbergen int len = 0; 15112bad8471SEric Van Hensbergen char *link = __getname(); 15122bad8471SEric Van Hensbergen 1513bd238fb4SLatchesar Ionkov P9_DPRINTK(P9_DEBUG_VFS, "%s n", dentry->d_name.name); 15142bad8471SEric Van Hensbergen 15152bad8471SEric Van Hensbergen if (!link) 15162bad8471SEric Van Hensbergen link = ERR_PTR(-ENOMEM); 15172bad8471SEric Van Hensbergen else { 151816cce6d2SLatchesar Ionkov len = v9fs_readlink(dentry, link, PATH_MAX); 15192bad8471SEric Van Hensbergen 15202bad8471SEric Van Hensbergen if (len < 0) { 1521ce44eeb6SDavi Arnaut __putname(link); 15222bad8471SEric Van Hensbergen link = ERR_PTR(len); 15232bad8471SEric Van Hensbergen } else 15242511cd0bSMartin Stava link[min(len, PATH_MAX-1)] = 0; 15252bad8471SEric Van Hensbergen } 15262bad8471SEric Van Hensbergen nd_set_link(nd, link); 15272bad8471SEric Van Hensbergen 15282bad8471SEric Van Hensbergen return NULL; 15292bad8471SEric Van Hensbergen } 15302bad8471SEric Van Hensbergen 15312bad8471SEric Van Hensbergen /** 15322bad8471SEric Van Hensbergen * v9fs_vfs_put_link - release a symlink path 15332bad8471SEric Van Hensbergen * @dentry: dentry for symlink 15342bad8471SEric Van Hensbergen * @nd: nameidata 1535ee443996SEric Van Hensbergen * @p: unused 15362bad8471SEric Van Hensbergen * 15372bad8471SEric Van Hensbergen */ 15382bad8471SEric Van Hensbergen 1539ee443996SEric Van Hensbergen static void 1540ee443996SEric Van Hensbergen v9fs_vfs_put_link(struct dentry *dentry, struct nameidata *nd, void *p) 15412bad8471SEric Van Hensbergen { 15422bad8471SEric Van Hensbergen char *s = nd_get_link(nd); 15432bad8471SEric Van Hensbergen 15446ff23207SDuane Griffin P9_DPRINTK(P9_DEBUG_VFS, " %s %s\n", dentry->d_name.name, 15456ff23207SDuane Griffin IS_ERR(s) ? "<error>" : s); 15462bad8471SEric Van Hensbergen if (!IS_ERR(s)) 1547ce44eeb6SDavi Arnaut __putname(s); 15482bad8471SEric Van Hensbergen } 15492bad8471SEric Van Hensbergen 1550ee443996SEric Van Hensbergen /** 1551ee443996SEric Van Hensbergen * v9fs_vfs_mkspecial - create a special file 1552ee443996SEric Van Hensbergen * @dir: inode to create special file in 1553ee443996SEric Van Hensbergen * @dentry: dentry to create 1554ee443996SEric Van Hensbergen * @mode: mode to create special file 1555ee443996SEric Van Hensbergen * @extension: 9p2000.u format extension string representing special file 1556ee443996SEric Van Hensbergen * 1557ee443996SEric Van Hensbergen */ 1558ee443996SEric Van Hensbergen 1559531b1094SLatchesar Ionkov static int v9fs_vfs_mkspecial(struct inode *dir, struct dentry *dentry, 1560531b1094SLatchesar Ionkov int mode, const char *extension) 1561531b1094SLatchesar Ionkov { 1562bd238fb4SLatchesar Ionkov u32 perm; 1563531b1094SLatchesar Ionkov struct v9fs_session_info *v9ses; 1564bd238fb4SLatchesar Ionkov struct p9_fid *fid; 1565531b1094SLatchesar Ionkov 15666a3124a3SLatchesar Ionkov v9ses = v9fs_inode2v9ses(dir); 1567dd6102fbSSripathi Kodi if (!v9fs_proto_dotu(v9ses)) { 1568bd238fb4SLatchesar Ionkov P9_DPRINTK(P9_DEBUG_ERROR, "not extended\n"); 15696a3124a3SLatchesar Ionkov return -EPERM; 1570531b1094SLatchesar Ionkov } 1571531b1094SLatchesar Ionkov 1572da977b2cSEric Van Hensbergen perm = unixmode2p9mode(v9ses, mode); 1573bd238fb4SLatchesar Ionkov fid = v9fs_create(v9ses, dir, dentry, (char *) extension, perm, 1574bd238fb4SLatchesar Ionkov P9_OREAD); 1575bd238fb4SLatchesar Ionkov if (IS_ERR(fid)) 1576bd238fb4SLatchesar Ionkov return PTR_ERR(fid); 1577da977b2cSEric Van Hensbergen 1578bd238fb4SLatchesar Ionkov p9_client_clunk(fid); 15796a3124a3SLatchesar Ionkov return 0; 1580531b1094SLatchesar Ionkov } 1581531b1094SLatchesar Ionkov 1582531b1094SLatchesar Ionkov /** 158350cc42ffSVenkateswararao Jujjuri (JV) * v9fs_vfs_symlink_dotl - helper function to create symlinks 158450cc42ffSVenkateswararao Jujjuri (JV) * @dir: directory inode containing symlink 158550cc42ffSVenkateswararao Jujjuri (JV) * @dentry: dentry for symlink 158650cc42ffSVenkateswararao Jujjuri (JV) * @symname: symlink data 158750cc42ffSVenkateswararao Jujjuri (JV) * 158850cc42ffSVenkateswararao Jujjuri (JV) * See Also: 9P2000.L RFC for more information 158950cc42ffSVenkateswararao Jujjuri (JV) * 159050cc42ffSVenkateswararao Jujjuri (JV) */ 159150cc42ffSVenkateswararao Jujjuri (JV) 159250cc42ffSVenkateswararao Jujjuri (JV) static int 159350cc42ffSVenkateswararao Jujjuri (JV) v9fs_vfs_symlink_dotl(struct inode *dir, struct dentry *dentry, 159450cc42ffSVenkateswararao Jujjuri (JV) const char *symname) 159550cc42ffSVenkateswararao Jujjuri (JV) { 159650cc42ffSVenkateswararao Jujjuri (JV) struct v9fs_session_info *v9ses; 159750cc42ffSVenkateswararao Jujjuri (JV) struct p9_fid *dfid; 159850cc42ffSVenkateswararao Jujjuri (JV) struct p9_fid *fid = NULL; 159950cc42ffSVenkateswararao Jujjuri (JV) struct inode *inode; 160050cc42ffSVenkateswararao Jujjuri (JV) struct p9_qid qid; 160150cc42ffSVenkateswararao Jujjuri (JV) char *name; 160250cc42ffSVenkateswararao Jujjuri (JV) int err; 160350cc42ffSVenkateswararao Jujjuri (JV) gid_t gid; 160450cc42ffSVenkateswararao Jujjuri (JV) 160550cc42ffSVenkateswararao Jujjuri (JV) name = (char *) dentry->d_name.name; 160650cc42ffSVenkateswararao Jujjuri (JV) P9_DPRINTK(P9_DEBUG_VFS, "v9fs_vfs_symlink_dotl : %lu,%s,%s\n", 160750cc42ffSVenkateswararao Jujjuri (JV) dir->i_ino, name, symname); 160850cc42ffSVenkateswararao Jujjuri (JV) v9ses = v9fs_inode2v9ses(dir); 160950cc42ffSVenkateswararao Jujjuri (JV) 161050cc42ffSVenkateswararao Jujjuri (JV) dfid = v9fs_fid_lookup(dentry->d_parent); 161150cc42ffSVenkateswararao Jujjuri (JV) if (IS_ERR(dfid)) { 161250cc42ffSVenkateswararao Jujjuri (JV) err = PTR_ERR(dfid); 161350cc42ffSVenkateswararao Jujjuri (JV) P9_DPRINTK(P9_DEBUG_VFS, "fid lookup failed %d\n", err); 161450cc42ffSVenkateswararao Jujjuri (JV) return err; 161550cc42ffSVenkateswararao Jujjuri (JV) } 161650cc42ffSVenkateswararao Jujjuri (JV) 161750cc42ffSVenkateswararao Jujjuri (JV) gid = v9fs_get_fsgid_for_create(dir); 161850cc42ffSVenkateswararao Jujjuri (JV) 161950cc42ffSVenkateswararao Jujjuri (JV) if (gid < 0) { 162050cc42ffSVenkateswararao Jujjuri (JV) P9_DPRINTK(P9_DEBUG_VFS, "v9fs_get_egid failed %d\n", gid); 162150cc42ffSVenkateswararao Jujjuri (JV) goto error; 162250cc42ffSVenkateswararao Jujjuri (JV) } 162350cc42ffSVenkateswararao Jujjuri (JV) 162450cc42ffSVenkateswararao Jujjuri (JV) /* Server doesn't alter fid on TSYMLINK. Hence no need to clone it. */ 162550cc42ffSVenkateswararao Jujjuri (JV) err = p9_client_symlink(dfid, name, (char *)symname, gid, &qid); 162650cc42ffSVenkateswararao Jujjuri (JV) 162750cc42ffSVenkateswararao Jujjuri (JV) if (err < 0) { 162850cc42ffSVenkateswararao Jujjuri (JV) P9_DPRINTK(P9_DEBUG_VFS, "p9_client_symlink failed %d\n", err); 162950cc42ffSVenkateswararao Jujjuri (JV) goto error; 163050cc42ffSVenkateswararao Jujjuri (JV) } 163150cc42ffSVenkateswararao Jujjuri (JV) 163250cc42ffSVenkateswararao Jujjuri (JV) if (v9ses->cache) { 163350cc42ffSVenkateswararao Jujjuri (JV) /* Now walk from the parent so we can get an unopened fid. */ 163450cc42ffSVenkateswararao Jujjuri (JV) fid = p9_client_walk(dfid, 1, &name, 1); 163550cc42ffSVenkateswararao Jujjuri (JV) if (IS_ERR(fid)) { 163650cc42ffSVenkateswararao Jujjuri (JV) err = PTR_ERR(fid); 163750cc42ffSVenkateswararao Jujjuri (JV) P9_DPRINTK(P9_DEBUG_VFS, "p9_client_walk failed %d\n", 163850cc42ffSVenkateswararao Jujjuri (JV) err); 163950cc42ffSVenkateswararao Jujjuri (JV) fid = NULL; 164050cc42ffSVenkateswararao Jujjuri (JV) goto error; 164150cc42ffSVenkateswararao Jujjuri (JV) } 164250cc42ffSVenkateswararao Jujjuri (JV) 164350cc42ffSVenkateswararao Jujjuri (JV) /* instantiate inode and assign the unopened fid to dentry */ 164450cc42ffSVenkateswararao Jujjuri (JV) inode = v9fs_inode_from_fid(v9ses, fid, dir->i_sb); 164550cc42ffSVenkateswararao Jujjuri (JV) if (IS_ERR(inode)) { 164650cc42ffSVenkateswararao Jujjuri (JV) err = PTR_ERR(inode); 164750cc42ffSVenkateswararao Jujjuri (JV) P9_DPRINTK(P9_DEBUG_VFS, "inode creation failed %d\n", 164850cc42ffSVenkateswararao Jujjuri (JV) err); 164950cc42ffSVenkateswararao Jujjuri (JV) goto error; 165050cc42ffSVenkateswararao Jujjuri (JV) } 165150cc42ffSVenkateswararao Jujjuri (JV) dentry->d_op = &v9fs_cached_dentry_operations; 165250cc42ffSVenkateswararao Jujjuri (JV) d_instantiate(dentry, inode); 165350cc42ffSVenkateswararao Jujjuri (JV) err = v9fs_fid_add(dentry, fid); 165450cc42ffSVenkateswararao Jujjuri (JV) if (err < 0) 165550cc42ffSVenkateswararao Jujjuri (JV) goto error; 165650cc42ffSVenkateswararao Jujjuri (JV) fid = NULL; 165750cc42ffSVenkateswararao Jujjuri (JV) } else { 165850cc42ffSVenkateswararao Jujjuri (JV) /* Not in cached mode. No need to populate inode with stat */ 165950cc42ffSVenkateswararao Jujjuri (JV) inode = v9fs_get_inode(dir->i_sb, S_IFLNK); 166050cc42ffSVenkateswararao Jujjuri (JV) if (IS_ERR(inode)) { 166150cc42ffSVenkateswararao Jujjuri (JV) err = PTR_ERR(inode); 166250cc42ffSVenkateswararao Jujjuri (JV) goto error; 166350cc42ffSVenkateswararao Jujjuri (JV) } 166450cc42ffSVenkateswararao Jujjuri (JV) dentry->d_op = &v9fs_dentry_operations; 166550cc42ffSVenkateswararao Jujjuri (JV) d_instantiate(dentry, inode); 166650cc42ffSVenkateswararao Jujjuri (JV) } 166750cc42ffSVenkateswararao Jujjuri (JV) 166850cc42ffSVenkateswararao Jujjuri (JV) error: 166950cc42ffSVenkateswararao Jujjuri (JV) if (fid) 167050cc42ffSVenkateswararao Jujjuri (JV) p9_client_clunk(fid); 167150cc42ffSVenkateswararao Jujjuri (JV) 167250cc42ffSVenkateswararao Jujjuri (JV) return err; 167350cc42ffSVenkateswararao Jujjuri (JV) } 167450cc42ffSVenkateswararao Jujjuri (JV) 167550cc42ffSVenkateswararao Jujjuri (JV) /** 1676531b1094SLatchesar Ionkov * v9fs_vfs_symlink - helper function to create symlinks 1677531b1094SLatchesar Ionkov * @dir: directory inode containing symlink 1678531b1094SLatchesar Ionkov * @dentry: dentry for symlink 1679531b1094SLatchesar Ionkov * @symname: symlink data 1680531b1094SLatchesar Ionkov * 1681ee443996SEric Van Hensbergen * See Also: 9P2000.u RFC for more information 1682531b1094SLatchesar Ionkov * 1683531b1094SLatchesar Ionkov */ 1684531b1094SLatchesar Ionkov 1685531b1094SLatchesar Ionkov static int 1686531b1094SLatchesar Ionkov v9fs_vfs_symlink(struct inode *dir, struct dentry *dentry, const char *symname) 1687531b1094SLatchesar Ionkov { 1688bd238fb4SLatchesar Ionkov P9_DPRINTK(P9_DEBUG_VFS, " %lu,%s,%s\n", dir->i_ino, 1689bd238fb4SLatchesar Ionkov dentry->d_name.name, symname); 1690531b1094SLatchesar Ionkov 1691531b1094SLatchesar Ionkov return v9fs_vfs_mkspecial(dir, dentry, S_IFLNK, symname); 1692531b1094SLatchesar Ionkov } 1693531b1094SLatchesar Ionkov 16942bad8471SEric Van Hensbergen /** 16952bad8471SEric Van Hensbergen * v9fs_vfs_link - create a hardlink 16962bad8471SEric Van Hensbergen * @old_dentry: dentry for file to link to 16972bad8471SEric Van Hensbergen * @dir: inode destination for new link 169873c592b9SEric Van Hensbergen * @dentry: dentry for link 16992bad8471SEric Van Hensbergen * 17002bad8471SEric Van Hensbergen */ 17012bad8471SEric Van Hensbergen 17022bad8471SEric Van Hensbergen static int 17032bad8471SEric Van Hensbergen v9fs_vfs_link(struct dentry *old_dentry, struct inode *dir, 17042bad8471SEric Van Hensbergen struct dentry *dentry) 17052bad8471SEric Van Hensbergen { 1706531b1094SLatchesar Ionkov int retval; 1707bd238fb4SLatchesar Ionkov struct p9_fid *oldfid; 1708531b1094SLatchesar Ionkov char *name; 17092bad8471SEric Van Hensbergen 1710bd238fb4SLatchesar Ionkov P9_DPRINTK(P9_DEBUG_VFS, 1711bd238fb4SLatchesar Ionkov " %lu,%s,%s\n", dir->i_ino, dentry->d_name.name, 17122bad8471SEric Van Hensbergen old_dentry->d_name.name); 17132bad8471SEric Van Hensbergen 1714da977b2cSEric Van Hensbergen oldfid = v9fs_fid_clone(old_dentry); 1715da977b2cSEric Van Hensbergen if (IS_ERR(oldfid)) 1716da977b2cSEric Van Hensbergen return PTR_ERR(oldfid); 17172bad8471SEric Van Hensbergen 1718531b1094SLatchesar Ionkov name = __getname(); 1719da977b2cSEric Van Hensbergen if (unlikely(!name)) { 1720da977b2cSEric Van Hensbergen retval = -ENOMEM; 1721da977b2cSEric Van Hensbergen goto clunk_fid; 1722da977b2cSEric Van Hensbergen } 17230710d36aSFlorin Malita 172416cce6d2SLatchesar Ionkov sprintf(name, "%d\n", oldfid->fid); 1725bd238fb4SLatchesar Ionkov retval = v9fs_vfs_mkspecial(dir, dentry, P9_DMLINK, name); 1726531b1094SLatchesar Ionkov __putname(name); 17272bad8471SEric Van Hensbergen 1728da977b2cSEric Van Hensbergen clunk_fid: 1729bd238fb4SLatchesar Ionkov p9_client_clunk(oldfid); 17302bad8471SEric Van Hensbergen return retval; 17312bad8471SEric Van Hensbergen } 17322bad8471SEric Van Hensbergen 17332bad8471SEric Van Hensbergen /** 173409d34ee5SEric Van Hensbergen * v9fs_vfs_link_dotl - create a hardlink for dotl 173509d34ee5SEric Van Hensbergen * @old_dentry: dentry for file to link to 173609d34ee5SEric Van Hensbergen * @dir: inode destination for new link 173709d34ee5SEric Van Hensbergen * @dentry: dentry for link 173809d34ee5SEric Van Hensbergen * 173909d34ee5SEric Van Hensbergen */ 174009d34ee5SEric Van Hensbergen 174109d34ee5SEric Van Hensbergen static int 174209d34ee5SEric Van Hensbergen v9fs_vfs_link_dotl(struct dentry *old_dentry, struct inode *dir, 174309d34ee5SEric Van Hensbergen struct dentry *dentry) 174409d34ee5SEric Van Hensbergen { 174509d34ee5SEric Van Hensbergen int err; 174609d34ee5SEric Van Hensbergen struct p9_fid *dfid, *oldfid; 174709d34ee5SEric Van Hensbergen char *name; 174809d34ee5SEric Van Hensbergen struct v9fs_session_info *v9ses; 174909d34ee5SEric Van Hensbergen struct dentry *dir_dentry; 175009d34ee5SEric Van Hensbergen 175109d34ee5SEric Van Hensbergen P9_DPRINTK(P9_DEBUG_VFS, "dir ino: %lu, old_name: %s, new_name: %s\n", 175209d34ee5SEric Van Hensbergen dir->i_ino, old_dentry->d_name.name, 175309d34ee5SEric Van Hensbergen dentry->d_name.name); 175409d34ee5SEric Van Hensbergen 175509d34ee5SEric Van Hensbergen v9ses = v9fs_inode2v9ses(dir); 175609d34ee5SEric Van Hensbergen dir_dentry = v9fs_dentry_from_dir_inode(dir); 175709d34ee5SEric Van Hensbergen dfid = v9fs_fid_lookup(dir_dentry); 175809d34ee5SEric Van Hensbergen if (IS_ERR(dfid)) 175909d34ee5SEric Van Hensbergen return PTR_ERR(dfid); 176009d34ee5SEric Van Hensbergen 176109d34ee5SEric Van Hensbergen oldfid = v9fs_fid_lookup(old_dentry); 176209d34ee5SEric Van Hensbergen if (IS_ERR(oldfid)) 176309d34ee5SEric Van Hensbergen return PTR_ERR(oldfid); 176409d34ee5SEric Van Hensbergen 176509d34ee5SEric Van Hensbergen name = (char *) dentry->d_name.name; 176609d34ee5SEric Van Hensbergen 176709d34ee5SEric Van Hensbergen err = p9_client_link(dfid, oldfid, (char *)dentry->d_name.name); 176809d34ee5SEric Van Hensbergen 176909d34ee5SEric Van Hensbergen if (err < 0) { 177009d34ee5SEric Van Hensbergen P9_DPRINTK(P9_DEBUG_VFS, "p9_client_link failed %d\n", err); 177109d34ee5SEric Van Hensbergen return err; 177209d34ee5SEric Van Hensbergen } 177309d34ee5SEric Van Hensbergen 177409d34ee5SEric Van Hensbergen if (v9ses->cache == CACHE_LOOSE || v9ses->cache == CACHE_FSCACHE) { 177509d34ee5SEric Van Hensbergen /* Get the latest stat info from server. */ 177609d34ee5SEric Van Hensbergen struct p9_fid *fid; 177709d34ee5SEric Van Hensbergen struct p9_stat_dotl *st; 177809d34ee5SEric Van Hensbergen 177909d34ee5SEric Van Hensbergen fid = v9fs_fid_lookup(old_dentry); 178009d34ee5SEric Van Hensbergen if (IS_ERR(fid)) 178109d34ee5SEric Van Hensbergen return PTR_ERR(fid); 178209d34ee5SEric Van Hensbergen 178309d34ee5SEric Van Hensbergen st = p9_client_getattr_dotl(fid, P9_STATS_BASIC); 178409d34ee5SEric Van Hensbergen if (IS_ERR(st)) 178509d34ee5SEric Van Hensbergen return PTR_ERR(st); 178609d34ee5SEric Van Hensbergen 178709d34ee5SEric Van Hensbergen v9fs_stat2inode_dotl(st, old_dentry->d_inode); 178809d34ee5SEric Van Hensbergen 178909d34ee5SEric Van Hensbergen kfree(st); 179009d34ee5SEric Van Hensbergen } else { 179109d34ee5SEric Van Hensbergen /* Caching disabled. No need to get upto date stat info. 179209d34ee5SEric Van Hensbergen * This dentry will be released immediately. So, just i_count++ 179309d34ee5SEric Van Hensbergen */ 179409d34ee5SEric Van Hensbergen atomic_inc(&old_dentry->d_inode->i_count); 179509d34ee5SEric Van Hensbergen } 179609d34ee5SEric Van Hensbergen 179709d34ee5SEric Van Hensbergen dentry->d_op = old_dentry->d_op; 179809d34ee5SEric Van Hensbergen d_instantiate(dentry, old_dentry->d_inode); 179909d34ee5SEric Van Hensbergen 180009d34ee5SEric Van Hensbergen return err; 180109d34ee5SEric Van Hensbergen } 180209d34ee5SEric Van Hensbergen 180309d34ee5SEric Van Hensbergen /** 18042bad8471SEric Van Hensbergen * v9fs_vfs_mknod - create a special file 18052bad8471SEric Van Hensbergen * @dir: inode destination for new link 18062bad8471SEric Van Hensbergen * @dentry: dentry for file 18072bad8471SEric Van Hensbergen * @mode: mode for creation 1808ee443996SEric Van Hensbergen * @rdev: device associated with special file 18092bad8471SEric Van Hensbergen * 18102bad8471SEric Van Hensbergen */ 18112bad8471SEric Van Hensbergen 18122bad8471SEric Van Hensbergen static int 18132bad8471SEric Van Hensbergen v9fs_vfs_mknod(struct inode *dir, struct dentry *dentry, int mode, dev_t rdev) 18142bad8471SEric Van Hensbergen { 1815531b1094SLatchesar Ionkov int retval; 1816531b1094SLatchesar Ionkov char *name; 18172bad8471SEric Van Hensbergen 1818bd238fb4SLatchesar Ionkov P9_DPRINTK(P9_DEBUG_VFS, 1819bd238fb4SLatchesar Ionkov " %lu,%s mode: %x MAJOR: %u MINOR: %u\n", dir->i_ino, 18202bad8471SEric Van Hensbergen dentry->d_name.name, mode, MAJOR(rdev), MINOR(rdev)); 18212bad8471SEric Van Hensbergen 1822531b1094SLatchesar Ionkov if (!new_valid_dev(rdev)) 1823531b1094SLatchesar Ionkov return -EINVAL; 182473c592b9SEric Van Hensbergen 1825531b1094SLatchesar Ionkov name = __getname(); 1826c0291a05SEugene Teo if (!name) 1827c0291a05SEugene Teo return -ENOMEM; 18282bad8471SEric Van Hensbergen /* build extension */ 18292bad8471SEric Van Hensbergen if (S_ISBLK(mode)) 1830531b1094SLatchesar Ionkov sprintf(name, "b %u %u", MAJOR(rdev), MINOR(rdev)); 18312bad8471SEric Van Hensbergen else if (S_ISCHR(mode)) 1832531b1094SLatchesar Ionkov sprintf(name, "c %u %u", MAJOR(rdev), MINOR(rdev)); 183373c592b9SEric Van Hensbergen else if (S_ISFIFO(mode)) 1834531b1094SLatchesar Ionkov *name = 0; 183575cc5c9bSVenkateswararao Jujjuri else if (S_ISSOCK(mode)) 183675cc5c9bSVenkateswararao Jujjuri *name = 0; 18372bad8471SEric Van Hensbergen else { 1838531b1094SLatchesar Ionkov __putname(name); 1839531b1094SLatchesar Ionkov return -EINVAL; 18402bad8471SEric Van Hensbergen } 18412bad8471SEric Van Hensbergen 1842531b1094SLatchesar Ionkov retval = v9fs_vfs_mkspecial(dir, dentry, mode, name); 1843531b1094SLatchesar Ionkov __putname(name); 18442bad8471SEric Van Hensbergen 18452bad8471SEric Van Hensbergen return retval; 18462bad8471SEric Van Hensbergen } 18472bad8471SEric Van Hensbergen 18484b43516aSM. Mohan Kumar /** 18494b43516aSM. Mohan Kumar * v9fs_vfs_mknod_dotl - create a special file 18504b43516aSM. Mohan Kumar * @dir: inode destination for new link 18514b43516aSM. Mohan Kumar * @dentry: dentry for file 18524b43516aSM. Mohan Kumar * @mode: mode for creation 18534b43516aSM. Mohan Kumar * @rdev: device associated with special file 18544b43516aSM. Mohan Kumar * 18554b43516aSM. Mohan Kumar */ 18564b43516aSM. Mohan Kumar static int 18574b43516aSM. Mohan Kumar v9fs_vfs_mknod_dotl(struct inode *dir, struct dentry *dentry, int mode, 18584b43516aSM. Mohan Kumar dev_t rdev) 18594b43516aSM. Mohan Kumar { 18604b43516aSM. Mohan Kumar int err; 18614b43516aSM. Mohan Kumar char *name; 18624b43516aSM. Mohan Kumar struct v9fs_session_info *v9ses; 18634b43516aSM. Mohan Kumar struct p9_fid *fid = NULL, *dfid = NULL; 18644b43516aSM. Mohan Kumar struct inode *inode; 18654b43516aSM. Mohan Kumar gid_t gid; 18664b43516aSM. Mohan Kumar struct p9_qid qid; 186701a622bdSM. Mohan Kumar struct dentry *dir_dentry; 18684b43516aSM. Mohan Kumar 18694b43516aSM. Mohan Kumar P9_DPRINTK(P9_DEBUG_VFS, 18704b43516aSM. Mohan Kumar " %lu,%s mode: %x MAJOR: %u MINOR: %u\n", dir->i_ino, 18714b43516aSM. Mohan Kumar dentry->d_name.name, mode, MAJOR(rdev), MINOR(rdev)); 18724b43516aSM. Mohan Kumar 18734b43516aSM. Mohan Kumar if (!new_valid_dev(rdev)) 18744b43516aSM. Mohan Kumar return -EINVAL; 18754b43516aSM. Mohan Kumar 18764b43516aSM. Mohan Kumar v9ses = v9fs_inode2v9ses(dir); 18774b43516aSM. Mohan Kumar dir_dentry = v9fs_dentry_from_dir_inode(dir); 187801a622bdSM. Mohan Kumar dfid = v9fs_fid_lookup(dir_dentry); 18794b43516aSM. Mohan Kumar if (IS_ERR(dfid)) { 18804b43516aSM. Mohan Kumar err = PTR_ERR(dfid); 18814b43516aSM. Mohan Kumar P9_DPRINTK(P9_DEBUG_VFS, "fid lookup failed %d\n", err); 18824b43516aSM. Mohan Kumar dfid = NULL; 18834b43516aSM. Mohan Kumar goto error; 18844b43516aSM. Mohan Kumar } 18854b43516aSM. Mohan Kumar 18864b43516aSM. Mohan Kumar gid = v9fs_get_fsgid_for_create(dir); 18874b43516aSM. Mohan Kumar if (gid < 0) { 18884b43516aSM. Mohan Kumar P9_DPRINTK(P9_DEBUG_VFS, "v9fs_get_fsgid_for_create failed\n"); 18894b43516aSM. Mohan Kumar goto error; 18904b43516aSM. Mohan Kumar } 18914b43516aSM. Mohan Kumar 18924b43516aSM. Mohan Kumar name = (char *) dentry->d_name.name; 18934b43516aSM. Mohan Kumar 18944b43516aSM. Mohan Kumar err = p9_client_mknod_dotl(dfid, name, mode, rdev, gid, &qid); 18954b43516aSM. Mohan Kumar if (err < 0) 18964b43516aSM. Mohan Kumar goto error; 18974b43516aSM. Mohan Kumar 18984b43516aSM. Mohan Kumar /* instantiate inode and assign the unopened fid to the dentry */ 18994b43516aSM. Mohan Kumar if (v9ses->cache == CACHE_LOOSE || v9ses->cache == CACHE_FSCACHE) { 19004b43516aSM. Mohan Kumar fid = p9_client_walk(dfid, 1, &name, 1); 19014b43516aSM. Mohan Kumar if (IS_ERR(fid)) { 19024b43516aSM. Mohan Kumar err = PTR_ERR(fid); 19034b43516aSM. Mohan Kumar P9_DPRINTK(P9_DEBUG_VFS, "p9_client_walk failed %d\n", 19044b43516aSM. Mohan Kumar err); 19054b43516aSM. Mohan Kumar fid = NULL; 19064b43516aSM. Mohan Kumar goto error; 19074b43516aSM. Mohan Kumar } 19084b43516aSM. Mohan Kumar 19094b43516aSM. Mohan Kumar inode = v9fs_inode_from_fid(v9ses, fid, dir->i_sb); 19104b43516aSM. Mohan Kumar if (IS_ERR(inode)) { 19114b43516aSM. Mohan Kumar err = PTR_ERR(inode); 19124b43516aSM. Mohan Kumar P9_DPRINTK(P9_DEBUG_VFS, "inode creation failed %d\n", 19134b43516aSM. Mohan Kumar err); 19144b43516aSM. Mohan Kumar goto error; 19154b43516aSM. Mohan Kumar } 19164b43516aSM. Mohan Kumar dentry->d_op = &v9fs_cached_dentry_operations; 19174b43516aSM. Mohan Kumar d_instantiate(dentry, inode); 19184b43516aSM. Mohan Kumar err = v9fs_fid_add(dentry, fid); 19194b43516aSM. Mohan Kumar if (err < 0) 19204b43516aSM. Mohan Kumar goto error; 19214b43516aSM. Mohan Kumar fid = NULL; 19224b43516aSM. Mohan Kumar } else { 19234b43516aSM. Mohan Kumar /* 19244b43516aSM. Mohan Kumar * Not in cached mode. No need to populate inode with stat. 19254b43516aSM. Mohan Kumar * socket syscall returns a fd, so we need instantiate 19264b43516aSM. Mohan Kumar */ 19274b43516aSM. Mohan Kumar inode = v9fs_get_inode(dir->i_sb, mode); 19284b43516aSM. Mohan Kumar if (IS_ERR(inode)) { 19294b43516aSM. Mohan Kumar err = PTR_ERR(inode); 19304b43516aSM. Mohan Kumar goto error; 19314b43516aSM. Mohan Kumar } 19324b43516aSM. Mohan Kumar dentry->d_op = &v9fs_dentry_operations; 19334b43516aSM. Mohan Kumar d_instantiate(dentry, inode); 19344b43516aSM. Mohan Kumar } 19354b43516aSM. Mohan Kumar 19364b43516aSM. Mohan Kumar error: 19374b43516aSM. Mohan Kumar if (fid) 19384b43516aSM. Mohan Kumar p9_client_clunk(fid); 19394b43516aSM. Mohan Kumar return err; 19404b43516aSM. Mohan Kumar } 19414b43516aSM. Mohan Kumar 19429b6533c9SSripathi Kodi static const struct inode_operations v9fs_dir_inode_operations_dotu = { 19439b6533c9SSripathi Kodi .create = v9fs_vfs_create, 19449b6533c9SSripathi Kodi .lookup = v9fs_vfs_lookup, 19459b6533c9SSripathi Kodi .symlink = v9fs_vfs_symlink, 194650cc42ffSVenkateswararao Jujjuri (JV) .link = v9fs_vfs_link, 19479b6533c9SSripathi Kodi .unlink = v9fs_vfs_unlink, 19489b6533c9SSripathi Kodi .mkdir = v9fs_vfs_mkdir, 19499b6533c9SSripathi Kodi .rmdir = v9fs_vfs_rmdir, 19501d76e313SAneesh Kumar K.V .mknod = v9fs_vfs_mknod, 19519b6533c9SSripathi Kodi .rename = v9fs_vfs_rename, 19529b6533c9SSripathi Kodi .getattr = v9fs_vfs_getattr, 19539b6533c9SSripathi Kodi .setattr = v9fs_vfs_setattr, 19549b6533c9SSripathi Kodi }; 19559b6533c9SSripathi Kodi 19569b6533c9SSripathi Kodi static const struct inode_operations v9fs_dir_inode_operations_dotl = { 19575643135aSVenkateswararao Jujjuri (JV) .create = v9fs_vfs_create_dotl, 19582bad8471SEric Van Hensbergen .lookup = v9fs_vfs_lookup, 195950cc42ffSVenkateswararao Jujjuri (JV) .link = v9fs_vfs_link_dotl, 196050cc42ffSVenkateswararao Jujjuri (JV) .symlink = v9fs_vfs_symlink_dotl, 19612bad8471SEric Van Hensbergen .unlink = v9fs_vfs_unlink, 196201a622bdSM. Mohan Kumar .mkdir = v9fs_vfs_mkdir_dotl, 19632bad8471SEric Van Hensbergen .rmdir = v9fs_vfs_rmdir, 19644b43516aSM. Mohan Kumar .mknod = v9fs_vfs_mknod_dotl, 19652bad8471SEric Van Hensbergen .rename = v9fs_vfs_rename, 1966f0853122SSripathi Kodi .getattr = v9fs_vfs_getattr_dotl, 196787d7845aSSripathi Kodi .setattr = v9fs_vfs_setattr_dotl, 1968ebf46264SAneesh Kumar K.V .setxattr = generic_setxattr, 1969ebf46264SAneesh Kumar K.V .getxattr = generic_getxattr, 1970ebf46264SAneesh Kumar K.V .removexattr = generic_removexattr, 1971ebf46264SAneesh Kumar K.V .listxattr = v9fs_listxattr, 1972ebf46264SAneesh Kumar K.V 19732bad8471SEric Van Hensbergen }; 19742bad8471SEric Van Hensbergen 1975754661f1SArjan van de Ven static const struct inode_operations v9fs_dir_inode_operations = { 1976b501611aSEric Van Hensbergen .create = v9fs_vfs_create, 1977b501611aSEric Van Hensbergen .lookup = v9fs_vfs_lookup, 1978b501611aSEric Van Hensbergen .unlink = v9fs_vfs_unlink, 1979b501611aSEric Van Hensbergen .mkdir = v9fs_vfs_mkdir, 1980b501611aSEric Van Hensbergen .rmdir = v9fs_vfs_rmdir, 1981b501611aSEric Van Hensbergen .mknod = v9fs_vfs_mknod, 1982b501611aSEric Van Hensbergen .rename = v9fs_vfs_rename, 1983b501611aSEric Van Hensbergen .getattr = v9fs_vfs_getattr, 1984b501611aSEric Van Hensbergen .setattr = v9fs_vfs_setattr, 1985b501611aSEric Van Hensbergen }; 1986b501611aSEric Van Hensbergen 1987754661f1SArjan van de Ven static const struct inode_operations v9fs_file_inode_operations = { 19882bad8471SEric Van Hensbergen .getattr = v9fs_vfs_getattr, 19892bad8471SEric Van Hensbergen .setattr = v9fs_vfs_setattr, 19902bad8471SEric Van Hensbergen }; 19912bad8471SEric Van Hensbergen 19929b6533c9SSripathi Kodi static const struct inode_operations v9fs_file_inode_operations_dotl = { 1993f0853122SSripathi Kodi .getattr = v9fs_vfs_getattr_dotl, 199487d7845aSSripathi Kodi .setattr = v9fs_vfs_setattr_dotl, 1995ebf46264SAneesh Kumar K.V .setxattr = generic_setxattr, 1996ebf46264SAneesh Kumar K.V .getxattr = generic_getxattr, 1997ebf46264SAneesh Kumar K.V .removexattr = generic_removexattr, 1998ebf46264SAneesh Kumar K.V .listxattr = v9fs_listxattr, 19999b6533c9SSripathi Kodi }; 20009b6533c9SSripathi Kodi 2001754661f1SArjan van de Ven static const struct inode_operations v9fs_symlink_inode_operations = { 2002204f2f0eSAl Viro .readlink = generic_readlink, 20032bad8471SEric Van Hensbergen .follow_link = v9fs_vfs_follow_link, 20042bad8471SEric Van Hensbergen .put_link = v9fs_vfs_put_link, 20052bad8471SEric Van Hensbergen .getattr = v9fs_vfs_getattr, 20062bad8471SEric Van Hensbergen .setattr = v9fs_vfs_setattr, 20072bad8471SEric Van Hensbergen }; 20089b6533c9SSripathi Kodi 20099b6533c9SSripathi Kodi static const struct inode_operations v9fs_symlink_inode_operations_dotl = { 20109b6533c9SSripathi Kodi .readlink = generic_readlink, 20119b6533c9SSripathi Kodi .follow_link = v9fs_vfs_follow_link, 20129b6533c9SSripathi Kodi .put_link = v9fs_vfs_put_link, 2013f0853122SSripathi Kodi .getattr = v9fs_vfs_getattr_dotl, 201487d7845aSSripathi Kodi .setattr = v9fs_vfs_setattr_dotl, 2015ebf46264SAneesh Kumar K.V .setxattr = generic_setxattr, 2016ebf46264SAneesh Kumar K.V .getxattr = generic_getxattr, 2017ebf46264SAneesh Kumar K.V .removexattr = generic_removexattr, 2018ebf46264SAneesh Kumar K.V .listxattr = v9fs_listxattr, 20199b6533c9SSripathi Kodi }; 2020