12bad8471SEric Van Hensbergen /* 22bad8471SEric Van Hensbergen * linux/fs/9p/vfs_inode.c 32bad8471SEric Van Hensbergen * 473c592b9SEric Van Hensbergen * This file contains vfs inode ops for the 9P2000 protocol. 52bad8471SEric Van Hensbergen * 62bad8471SEric Van Hensbergen * Copyright (C) 2004 by Eric Van Hensbergen <ericvh@gmail.com> 72bad8471SEric Van Hensbergen * Copyright (C) 2002 by Ron Minnich <rminnich@lanl.gov> 82bad8471SEric Van Hensbergen * 92bad8471SEric Van Hensbergen * This program is free software; you can redistribute it and/or modify 1042e8c509SEric Van Hensbergen * it under the terms of the GNU General Public License version 2 1142e8c509SEric Van Hensbergen * as published by the Free Software Foundation. 122bad8471SEric Van Hensbergen * 132bad8471SEric Van Hensbergen * This program is distributed in the hope that it will be useful, 142bad8471SEric Van Hensbergen * but WITHOUT ANY WARRANTY; without even the implied warranty of 152bad8471SEric Van Hensbergen * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 162bad8471SEric Van Hensbergen * GNU General Public License for more details. 172bad8471SEric Van Hensbergen * 182bad8471SEric Van Hensbergen * You should have received a copy of the GNU General Public License 192bad8471SEric Van Hensbergen * along with this program; if not, write to: 202bad8471SEric Van Hensbergen * Free Software Foundation 212bad8471SEric Van Hensbergen * 51 Franklin Street, Fifth Floor 222bad8471SEric Van Hensbergen * Boston, MA 02111-1301 USA 232bad8471SEric Van Hensbergen * 242bad8471SEric Van Hensbergen */ 252bad8471SEric Van Hensbergen 262bad8471SEric Van Hensbergen #include <linux/module.h> 272bad8471SEric Van Hensbergen #include <linux/errno.h> 282bad8471SEric Van Hensbergen #include <linux/fs.h> 292bad8471SEric Van Hensbergen #include <linux/file.h> 302bad8471SEric Van Hensbergen #include <linux/pagemap.h> 312bad8471SEric Van Hensbergen #include <linux/stat.h> 322bad8471SEric Van Hensbergen #include <linux/string.h> 332bad8471SEric Van Hensbergen #include <linux/inet.h> 342bad8471SEric Van Hensbergen #include <linux/namei.h> 352bad8471SEric Van Hensbergen #include <linux/idr.h> 36e8edc6e0SAlexey Dobriyan #include <linux/sched.h> 375a0e3ad6STejun Heo #include <linux/slab.h> 38ebf46264SAneesh Kumar K.V #include <linux/xattr.h> 3985ff872dSAneesh Kumar K.V #include <linux/posix_acl.h> 40bd238fb4SLatchesar Ionkov #include <net/9p/9p.h> 41bd238fb4SLatchesar Ionkov #include <net/9p/client.h> 422bad8471SEric Van Hensbergen 432bad8471SEric Van Hensbergen #include "v9fs.h" 442bad8471SEric Van Hensbergen #include "v9fs_vfs.h" 452bad8471SEric Van Hensbergen #include "fid.h" 4660e78d2cSAbhishek Kulkarni #include "cache.h" 47ebf46264SAneesh Kumar K.V #include "xattr.h" 4885ff872dSAneesh Kumar K.V #include "acl.h" 492bad8471SEric Van Hensbergen 50754661f1SArjan van de Ven static const struct inode_operations v9fs_dir_inode_operations; 519b6533c9SSripathi Kodi static const struct inode_operations v9fs_dir_inode_operations_dotu; 52754661f1SArjan van de Ven static const struct inode_operations v9fs_file_inode_operations; 53754661f1SArjan van de Ven static const struct inode_operations v9fs_symlink_inode_operations; 54f5fc6145SAneesh Kumar K.V 552bad8471SEric Van Hensbergen /** 562bad8471SEric Van Hensbergen * unixmode2p9mode - convert unix mode bits to plan 9 572bad8471SEric Van Hensbergen * @v9ses: v9fs session information 582bad8471SEric Van Hensbergen * @mode: mode to convert 592bad8471SEric Van Hensbergen * 602bad8471SEric Van Hensbergen */ 612bad8471SEric Van Hensbergen 6273c592b9SEric Van Hensbergen static int unixmode2p9mode(struct v9fs_session_info *v9ses, int mode) 632bad8471SEric Van Hensbergen { 642bad8471SEric Van Hensbergen int res; 652bad8471SEric Van Hensbergen res = mode & 0777; 662bad8471SEric Van Hensbergen if (S_ISDIR(mode)) 67bd238fb4SLatchesar Ionkov res |= P9_DMDIR; 68dd6102fbSSripathi Kodi if (v9fs_proto_dotu(v9ses)) { 692bad8471SEric Van Hensbergen if (S_ISLNK(mode)) 70bd238fb4SLatchesar Ionkov res |= P9_DMSYMLINK; 712bad8471SEric Van Hensbergen if (v9ses->nodev == 0) { 722bad8471SEric Van Hensbergen if (S_ISSOCK(mode)) 73bd238fb4SLatchesar Ionkov res |= P9_DMSOCKET; 742bad8471SEric Van Hensbergen if (S_ISFIFO(mode)) 75bd238fb4SLatchesar Ionkov res |= P9_DMNAMEDPIPE; 762bad8471SEric Van Hensbergen if (S_ISBLK(mode)) 77bd238fb4SLatchesar Ionkov res |= P9_DMDEVICE; 782bad8471SEric Van Hensbergen if (S_ISCHR(mode)) 79bd238fb4SLatchesar Ionkov res |= P9_DMDEVICE; 802bad8471SEric Van Hensbergen } 812bad8471SEric Van Hensbergen 822bad8471SEric Van Hensbergen if ((mode & S_ISUID) == S_ISUID) 83bd238fb4SLatchesar Ionkov res |= P9_DMSETUID; 842bad8471SEric Van Hensbergen if ((mode & S_ISGID) == S_ISGID) 85bd238fb4SLatchesar Ionkov res |= P9_DMSETGID; 86d199d652SAnthony Liguori if ((mode & S_ISVTX) == S_ISVTX) 87d199d652SAnthony Liguori res |= P9_DMSETVTX; 88bd238fb4SLatchesar Ionkov if ((mode & P9_DMLINK)) 89bd238fb4SLatchesar Ionkov res |= P9_DMLINK; 902bad8471SEric Van Hensbergen } 912bad8471SEric Van Hensbergen 922bad8471SEric Van Hensbergen return res; 932bad8471SEric Van Hensbergen } 942bad8471SEric Van Hensbergen 952bad8471SEric Van Hensbergen /** 962bad8471SEric Van Hensbergen * p9mode2unixmode- convert plan9 mode bits to unix mode bits 972bad8471SEric Van Hensbergen * @v9ses: v9fs session information 9845089142SAneesh Kumar K.V * @stat: p9_wstat from which mode need to be derived 9945089142SAneesh Kumar K.V * @rdev: major number, minor number in case of device files. 1002bad8471SEric Van Hensbergen * 1012bad8471SEric Van Hensbergen */ 10245089142SAneesh Kumar K.V static int p9mode2unixmode(struct v9fs_session_info *v9ses, 10345089142SAneesh Kumar K.V struct p9_wstat *stat, dev_t *rdev) 1042bad8471SEric Van Hensbergen { 1052bad8471SEric Van Hensbergen int res; 10645089142SAneesh Kumar K.V int mode = stat->mode; 1072bad8471SEric Van Hensbergen 10845089142SAneesh Kumar K.V res = mode & S_IALLUGO; 10945089142SAneesh Kumar K.V *rdev = 0; 1102bad8471SEric Van Hensbergen 111bd238fb4SLatchesar Ionkov if ((mode & P9_DMDIR) == P9_DMDIR) 1122bad8471SEric Van Hensbergen res |= S_IFDIR; 113dd6102fbSSripathi Kodi else if ((mode & P9_DMSYMLINK) && (v9fs_proto_dotu(v9ses))) 1142bad8471SEric Van Hensbergen res |= S_IFLNK; 115dd6102fbSSripathi Kodi else if ((mode & P9_DMSOCKET) && (v9fs_proto_dotu(v9ses)) 1162bad8471SEric Van Hensbergen && (v9ses->nodev == 0)) 1172bad8471SEric Van Hensbergen res |= S_IFSOCK; 118dd6102fbSSripathi Kodi else if ((mode & P9_DMNAMEDPIPE) && (v9fs_proto_dotu(v9ses)) 1192bad8471SEric Van Hensbergen && (v9ses->nodev == 0)) 1202bad8471SEric Van Hensbergen res |= S_IFIFO; 121dd6102fbSSripathi Kodi else if ((mode & P9_DMDEVICE) && (v9fs_proto_dotu(v9ses)) 12245089142SAneesh Kumar K.V && (v9ses->nodev == 0)) { 12345089142SAneesh Kumar K.V char type = 0, ext[32]; 12445089142SAneesh Kumar K.V int major = -1, minor = -1; 12545089142SAneesh Kumar K.V 12645089142SAneesh Kumar K.V strncpy(ext, stat->extension, sizeof(ext)); 12745089142SAneesh Kumar K.V sscanf(ext, "%c %u %u", &type, &major, &minor); 12845089142SAneesh Kumar K.V switch (type) { 12945089142SAneesh Kumar K.V case 'c': 13045089142SAneesh Kumar K.V res |= S_IFCHR; 13145089142SAneesh Kumar K.V break; 13245089142SAneesh Kumar K.V case 'b': 1332bad8471SEric Van Hensbergen res |= S_IFBLK; 13445089142SAneesh Kumar K.V break; 13545089142SAneesh Kumar K.V default: 13645089142SAneesh Kumar K.V P9_DPRINTK(P9_DEBUG_ERROR, 13745089142SAneesh Kumar K.V "Unknown special type %c %s\n", type, 13845089142SAneesh Kumar K.V stat->extension); 13945089142SAneesh Kumar K.V }; 14045089142SAneesh Kumar K.V *rdev = MKDEV(major, minor); 14145089142SAneesh Kumar K.V } else 1422bad8471SEric Van Hensbergen res |= S_IFREG; 1432bad8471SEric Van Hensbergen 144dd6102fbSSripathi Kodi if (v9fs_proto_dotu(v9ses)) { 145bd238fb4SLatchesar Ionkov if ((mode & P9_DMSETUID) == P9_DMSETUID) 1462bad8471SEric Van Hensbergen res |= S_ISUID; 1472bad8471SEric Van Hensbergen 148bd238fb4SLatchesar Ionkov if ((mode & P9_DMSETGID) == P9_DMSETGID) 1492bad8471SEric Van Hensbergen res |= S_ISGID; 150d199d652SAnthony Liguori 151d199d652SAnthony Liguori if ((mode & P9_DMSETVTX) == P9_DMSETVTX) 152d199d652SAnthony Liguori res |= S_ISVTX; 1532bad8471SEric Van Hensbergen } 1542bad8471SEric Van Hensbergen return res; 1552bad8471SEric Van Hensbergen } 1562bad8471SEric Van Hensbergen 157ee443996SEric Van Hensbergen /** 158ee443996SEric Van Hensbergen * v9fs_uflags2omode- convert posix open flags to plan 9 mode bits 159ee443996SEric Van Hensbergen * @uflags: flags to convert 1602e4bef41SEric Van Hensbergen * @extended: if .u extensions are active 161ee443996SEric Van Hensbergen */ 162ee443996SEric Van Hensbergen 1632e4bef41SEric Van Hensbergen int v9fs_uflags2omode(int uflags, int extended) 1646a3124a3SLatchesar Ionkov { 1656a3124a3SLatchesar Ionkov int ret; 1666a3124a3SLatchesar Ionkov 1676a3124a3SLatchesar Ionkov ret = 0; 1686a3124a3SLatchesar Ionkov switch (uflags&3) { 1696a3124a3SLatchesar Ionkov default: 1706a3124a3SLatchesar Ionkov case O_RDONLY: 171bd238fb4SLatchesar Ionkov ret = P9_OREAD; 1726a3124a3SLatchesar Ionkov break; 1736a3124a3SLatchesar Ionkov 1746a3124a3SLatchesar Ionkov case O_WRONLY: 175bd238fb4SLatchesar Ionkov ret = P9_OWRITE; 1766a3124a3SLatchesar Ionkov break; 1776a3124a3SLatchesar Ionkov 1786a3124a3SLatchesar Ionkov case O_RDWR: 179bd238fb4SLatchesar Ionkov ret = P9_ORDWR; 1806a3124a3SLatchesar Ionkov break; 1816a3124a3SLatchesar Ionkov } 1826a3124a3SLatchesar Ionkov 1836a3124a3SLatchesar Ionkov if (uflags & O_TRUNC) 184bd238fb4SLatchesar Ionkov ret |= P9_OTRUNC; 1856a3124a3SLatchesar Ionkov 1862e4bef41SEric Van Hensbergen if (extended) { 1872e4bef41SEric Van Hensbergen if (uflags & O_EXCL) 1882e4bef41SEric Van Hensbergen ret |= P9_OEXCL; 1892e4bef41SEric Van Hensbergen 1906a3124a3SLatchesar Ionkov if (uflags & O_APPEND) 191bd238fb4SLatchesar Ionkov ret |= P9_OAPPEND; 1922e4bef41SEric Van Hensbergen } 1936a3124a3SLatchesar Ionkov 1946a3124a3SLatchesar Ionkov return ret; 1956a3124a3SLatchesar Ionkov } 1966a3124a3SLatchesar Ionkov 1972bad8471SEric Van Hensbergen /** 198531b1094SLatchesar Ionkov * v9fs_blank_wstat - helper function to setup a 9P stat structure 199531b1094SLatchesar Ionkov * @wstat: structure to initialize 2002bad8471SEric Van Hensbergen * 2012bad8471SEric Van Hensbergen */ 2022bad8471SEric Van Hensbergen 2037a4439c4SM. Mohan Kumar void 204bd238fb4SLatchesar Ionkov v9fs_blank_wstat(struct p9_wstat *wstat) 2052bad8471SEric Van Hensbergen { 206531b1094SLatchesar Ionkov wstat->type = ~0; 207531b1094SLatchesar Ionkov wstat->dev = ~0; 208531b1094SLatchesar Ionkov wstat->qid.type = ~0; 209531b1094SLatchesar Ionkov wstat->qid.version = ~0; 210531b1094SLatchesar Ionkov *((long long *)&wstat->qid.path) = ~0; 211531b1094SLatchesar Ionkov wstat->mode = ~0; 212531b1094SLatchesar Ionkov wstat->atime = ~0; 213531b1094SLatchesar Ionkov wstat->mtime = ~0; 214531b1094SLatchesar Ionkov wstat->length = ~0; 215531b1094SLatchesar Ionkov wstat->name = NULL; 216531b1094SLatchesar Ionkov wstat->uid = NULL; 217531b1094SLatchesar Ionkov wstat->gid = NULL; 218531b1094SLatchesar Ionkov wstat->muid = NULL; 219531b1094SLatchesar Ionkov wstat->n_uid = ~0; 220531b1094SLatchesar Ionkov wstat->n_gid = ~0; 221531b1094SLatchesar Ionkov wstat->n_muid = ~0; 222531b1094SLatchesar Ionkov wstat->extension = NULL; 2232bad8471SEric Van Hensbergen } 2242bad8471SEric Van Hensbergen 22560e78d2cSAbhishek Kulkarni /** 22660e78d2cSAbhishek Kulkarni * v9fs_alloc_inode - helper function to allocate an inode 22760e78d2cSAbhishek Kulkarni * 22860e78d2cSAbhishek Kulkarni */ 22960e78d2cSAbhishek Kulkarni struct inode *v9fs_alloc_inode(struct super_block *sb) 23060e78d2cSAbhishek Kulkarni { 231a78ce05dSAneesh Kumar K.V struct v9fs_inode *v9inode; 232a78ce05dSAneesh Kumar K.V v9inode = (struct v9fs_inode *)kmem_cache_alloc(v9fs_inode_cache, 23360e78d2cSAbhishek Kulkarni GFP_KERNEL); 234a78ce05dSAneesh Kumar K.V if (!v9inode) 23560e78d2cSAbhishek Kulkarni return NULL; 236a78ce05dSAneesh Kumar K.V #ifdef CONFIG_9P_FSCACHE 237a78ce05dSAneesh Kumar K.V v9inode->fscache = NULL; 238a78ce05dSAneesh Kumar K.V spin_lock_init(&v9inode->fscache_lock); 239a78ce05dSAneesh Kumar K.V #endif 2406b39f6d2SAneesh Kumar K.V v9inode->writeback_fid = NULL; 241b3cbea03SAneesh Kumar K.V v9inode->cache_validity = 0; 2425a7e0a8cSAneesh Kumar K.V mutex_init(&v9inode->v_mutex); 243a78ce05dSAneesh Kumar K.V return &v9inode->vfs_inode; 24460e78d2cSAbhishek Kulkarni } 24560e78d2cSAbhishek Kulkarni 24660e78d2cSAbhishek Kulkarni /** 24760e78d2cSAbhishek Kulkarni * v9fs_destroy_inode - destroy an inode 24860e78d2cSAbhishek Kulkarni * 24960e78d2cSAbhishek Kulkarni */ 25060e78d2cSAbhishek Kulkarni 251fa0d7e3dSNick Piggin static void v9fs_i_callback(struct rcu_head *head) 252fa0d7e3dSNick Piggin { 253fa0d7e3dSNick Piggin struct inode *inode = container_of(head, struct inode, i_rcu); 254fa0d7e3dSNick Piggin INIT_LIST_HEAD(&inode->i_dentry); 255a78ce05dSAneesh Kumar K.V kmem_cache_free(v9fs_inode_cache, V9FS_I(inode)); 256fa0d7e3dSNick Piggin } 257fa0d7e3dSNick Piggin 25860e78d2cSAbhishek Kulkarni void v9fs_destroy_inode(struct inode *inode) 25960e78d2cSAbhishek Kulkarni { 260fa0d7e3dSNick Piggin call_rcu(&inode->i_rcu, v9fs_i_callback); 26160e78d2cSAbhishek Kulkarni } 26260e78d2cSAbhishek Kulkarni 2635ffc0cb3SAneesh Kumar K.V int v9fs_init_inode(struct v9fs_session_info *v9ses, 26445089142SAneesh Kumar K.V struct inode *inode, int mode, dev_t rdev) 2652bad8471SEric Van Hensbergen { 2665ffc0cb3SAneesh Kumar K.V int err = 0; 2672bb54115SAbhishek Kulkarni 268217f206dSDmitry Monakhov inode_init_owner(inode, NULL, mode); 2692bad8471SEric Van Hensbergen inode->i_blocks = 0; 27045089142SAneesh Kumar K.V inode->i_rdev = rdev; 2712bad8471SEric Van Hensbergen inode->i_atime = inode->i_mtime = inode->i_ctime = CURRENT_TIME; 272147b31cfSEric Van Hensbergen inode->i_mapping->a_ops = &v9fs_addr_operations; 2732bad8471SEric Van Hensbergen 2742bad8471SEric Van Hensbergen switch (mode & S_IFMT) { 2752bad8471SEric Van Hensbergen case S_IFIFO: 2762bad8471SEric Van Hensbergen case S_IFBLK: 2772bad8471SEric Van Hensbergen case S_IFCHR: 2782bad8471SEric Van Hensbergen case S_IFSOCK: 2794b43516aSM. Mohan Kumar if (v9fs_proto_dotl(v9ses)) { 2804b43516aSM. Mohan Kumar inode->i_op = &v9fs_file_inode_operations_dotl; 2814b43516aSM. Mohan Kumar inode->i_fop = &v9fs_file_operations_dotl; 2824b43516aSM. Mohan Kumar } else if (v9fs_proto_dotu(v9ses)) { 2834b43516aSM. Mohan Kumar inode->i_op = &v9fs_file_inode_operations; 2844b43516aSM. Mohan Kumar inode->i_fop = &v9fs_file_operations; 2854b43516aSM. Mohan Kumar } else { 286bd238fb4SLatchesar Ionkov P9_DPRINTK(P9_DEBUG_ERROR, 287bd238fb4SLatchesar Ionkov "special files without extended mode\n"); 2882bb54115SAbhishek Kulkarni err = -EINVAL; 2892bb54115SAbhishek Kulkarni goto error; 290b501611aSEric Van Hensbergen } 2912bb54115SAbhishek Kulkarni init_special_inode(inode, inode->i_mode, inode->i_rdev); 2925d58bec5SEric Van Hensbergen break; 2932bad8471SEric Van Hensbergen case S_IFREG: 2949b6533c9SSripathi Kodi if (v9fs_proto_dotl(v9ses)) { 2959b6533c9SSripathi Kodi inode->i_op = &v9fs_file_inode_operations_dotl; 29629236f4eSAneesh Kumar K.V if (v9ses->cache) 29729236f4eSAneesh Kumar K.V inode->i_fop = 29829236f4eSAneesh Kumar K.V &v9fs_cached_file_operations_dotl; 29929236f4eSAneesh Kumar K.V else 3009b6533c9SSripathi Kodi inode->i_fop = &v9fs_file_operations_dotl; 3019b6533c9SSripathi Kodi } else { 3022bad8471SEric Van Hensbergen inode->i_op = &v9fs_file_inode_operations; 30329236f4eSAneesh Kumar K.V if (v9ses->cache) 30429236f4eSAneesh Kumar K.V inode->i_fop = &v9fs_cached_file_operations; 30529236f4eSAneesh Kumar K.V else 3062bad8471SEric Van Hensbergen inode->i_fop = &v9fs_file_operations; 3079b6533c9SSripathi Kodi } 3089b6533c9SSripathi Kodi 3092bad8471SEric Van Hensbergen break; 310b501611aSEric Van Hensbergen case S_IFLNK: 3119b6533c9SSripathi Kodi if (!v9fs_proto_dotu(v9ses) && !v9fs_proto_dotl(v9ses)) { 3129b6533c9SSripathi Kodi P9_DPRINTK(P9_DEBUG_ERROR, "extended modes used with " 3139b6533c9SSripathi Kodi "legacy protocol.\n"); 3142bb54115SAbhishek Kulkarni err = -EINVAL; 3152bb54115SAbhishek Kulkarni goto error; 316b501611aSEric Van Hensbergen } 3179b6533c9SSripathi Kodi 3189b6533c9SSripathi Kodi if (v9fs_proto_dotl(v9ses)) 3199b6533c9SSripathi Kodi inode->i_op = &v9fs_symlink_inode_operations_dotl; 3209b6533c9SSripathi Kodi else 321b501611aSEric Van Hensbergen inode->i_op = &v9fs_symlink_inode_operations; 3229b6533c9SSripathi Kodi 323b501611aSEric Van Hensbergen break; 3242bad8471SEric Van Hensbergen case S_IFDIR: 325d8c76e6fSDave Hansen inc_nlink(inode); 3269b6533c9SSripathi Kodi if (v9fs_proto_dotl(v9ses)) 3279b6533c9SSripathi Kodi inode->i_op = &v9fs_dir_inode_operations_dotl; 3289b6533c9SSripathi Kodi else if (v9fs_proto_dotu(v9ses)) 3299b6533c9SSripathi Kodi inode->i_op = &v9fs_dir_inode_operations_dotu; 330b501611aSEric Van Hensbergen else 3312bad8471SEric Van Hensbergen inode->i_op = &v9fs_dir_inode_operations; 3329b6533c9SSripathi Kodi 3339b6533c9SSripathi Kodi if (v9fs_proto_dotl(v9ses)) 3349b6533c9SSripathi Kodi inode->i_fop = &v9fs_dir_operations_dotl; 3359b6533c9SSripathi Kodi else 3362bad8471SEric Van Hensbergen inode->i_fop = &v9fs_dir_operations; 3379b6533c9SSripathi Kodi 3382bad8471SEric Van Hensbergen break; 3392bad8471SEric Van Hensbergen default: 3402bb54115SAbhishek Kulkarni P9_DPRINTK(P9_DEBUG_ERROR, "BAD mode 0x%x S_IFMT 0x%x\n", 3412bad8471SEric Van Hensbergen mode, mode & S_IFMT); 3422bb54115SAbhishek Kulkarni err = -EINVAL; 3432bb54115SAbhishek Kulkarni goto error; 3442bad8471SEric Van Hensbergen } 3452bb54115SAbhishek Kulkarni error: 3465ffc0cb3SAneesh Kumar K.V return err; 3475ffc0cb3SAneesh Kumar K.V 3485ffc0cb3SAneesh Kumar K.V } 3495ffc0cb3SAneesh Kumar K.V 3505ffc0cb3SAneesh Kumar K.V /** 3515ffc0cb3SAneesh Kumar K.V * v9fs_get_inode - helper function to setup an inode 3525ffc0cb3SAneesh Kumar K.V * @sb: superblock 3535ffc0cb3SAneesh Kumar K.V * @mode: mode to setup inode with 3545ffc0cb3SAneesh Kumar K.V * 3555ffc0cb3SAneesh Kumar K.V */ 3565ffc0cb3SAneesh Kumar K.V 35745089142SAneesh Kumar K.V struct inode *v9fs_get_inode(struct super_block *sb, int mode, dev_t rdev) 3585ffc0cb3SAneesh Kumar K.V { 3595ffc0cb3SAneesh Kumar K.V int err; 3605ffc0cb3SAneesh Kumar K.V struct inode *inode; 3615ffc0cb3SAneesh Kumar K.V struct v9fs_session_info *v9ses = sb->s_fs_info; 3625ffc0cb3SAneesh Kumar K.V 3635ffc0cb3SAneesh Kumar K.V P9_DPRINTK(P9_DEBUG_VFS, "super block: %p mode: %o\n", sb, mode); 3645ffc0cb3SAneesh Kumar K.V 3655ffc0cb3SAneesh Kumar K.V inode = new_inode(sb); 3665ffc0cb3SAneesh Kumar K.V if (!inode) { 3675ffc0cb3SAneesh Kumar K.V P9_EPRINTK(KERN_WARNING, "Problem allocating inode\n"); 3685ffc0cb3SAneesh Kumar K.V return ERR_PTR(-ENOMEM); 3695ffc0cb3SAneesh Kumar K.V } 37045089142SAneesh Kumar K.V err = v9fs_init_inode(v9ses, inode, mode, rdev); 3715ffc0cb3SAneesh Kumar K.V if (err) { 3722bb54115SAbhishek Kulkarni iput(inode); 3732bb54115SAbhishek Kulkarni return ERR_PTR(err); 3742bad8471SEric Van Hensbergen } 3755ffc0cb3SAneesh Kumar K.V return inode; 3765ffc0cb3SAneesh Kumar K.V } 3772bad8471SEric Van Hensbergen 378bd238fb4SLatchesar Ionkov /* 3796a3124a3SLatchesar Ionkov static struct v9fs_fid* 3806a3124a3SLatchesar Ionkov v9fs_clone_walk(struct v9fs_session_info *v9ses, u32 fid, struct dentry *dentry) 3816a3124a3SLatchesar Ionkov { 3826a3124a3SLatchesar Ionkov int err; 383736c4b85SMika Kukkonen int nfid; 3846a3124a3SLatchesar Ionkov struct v9fs_fid *ret; 3856a3124a3SLatchesar Ionkov struct v9fs_fcall *fcall; 3860b8dd177SLatchesar Ionkov 3876a3124a3SLatchesar Ionkov nfid = v9fs_get_idpool(&v9ses->fidpool); 3886a3124a3SLatchesar Ionkov if (nfid < 0) { 3890b8dd177SLatchesar Ionkov eprintk(KERN_WARNING, "no free fids available\n"); 390731805b4SLatchesar Ionkov return ERR_PTR(-ENOSPC); 3910b8dd177SLatchesar Ionkov } 3920b8dd177SLatchesar Ionkov 3936a3124a3SLatchesar Ionkov err = v9fs_t_walk(v9ses, fid, nfid, (char *) dentry->d_name.name, 3946a3124a3SLatchesar Ionkov &fcall); 3956a3124a3SLatchesar Ionkov 3966a3124a3SLatchesar Ionkov if (err < 0) { 39741e5a6acSLatchesar Ionkov if (fcall && fcall->id == RWALK) 39841e5a6acSLatchesar Ionkov goto clunk_fid; 39941e5a6acSLatchesar Ionkov 4006a3124a3SLatchesar Ionkov PRINT_FCALL_ERROR("walk error", fcall); 4016a3124a3SLatchesar Ionkov v9fs_put_idpool(nfid, &v9ses->fidpool); 4026a3124a3SLatchesar Ionkov goto error; 4030b8dd177SLatchesar Ionkov } 4046a3124a3SLatchesar Ionkov 4053cf6429aSLatchesar Ionkov kfree(fcall); 4063cf6429aSLatchesar Ionkov fcall = NULL; 4076a3124a3SLatchesar Ionkov ret = v9fs_fid_create(v9ses, nfid); 4086a3124a3SLatchesar Ionkov if (!ret) { 4096a3124a3SLatchesar Ionkov err = -ENOMEM; 4106a3124a3SLatchesar Ionkov goto clunk_fid; 4110b8dd177SLatchesar Ionkov } 4122bad8471SEric Van Hensbergen 4136a3124a3SLatchesar Ionkov err = v9fs_fid_insert(ret, dentry); 4146a3124a3SLatchesar Ionkov if (err < 0) { 4156a3124a3SLatchesar Ionkov v9fs_fid_destroy(ret); 4166a3124a3SLatchesar Ionkov goto clunk_fid; 4176a3124a3SLatchesar Ionkov } 4182bad8471SEric Van Hensbergen 4196a3124a3SLatchesar Ionkov return ret; 4206a3124a3SLatchesar Ionkov 4216a3124a3SLatchesar Ionkov clunk_fid: 4226a3124a3SLatchesar Ionkov v9fs_t_clunk(v9ses, nfid); 4236a3124a3SLatchesar Ionkov 4246a3124a3SLatchesar Ionkov error: 4256a3124a3SLatchesar Ionkov kfree(fcall); 4266a3124a3SLatchesar Ionkov return ERR_PTR(err); 4276a3124a3SLatchesar Ionkov } 428bd238fb4SLatchesar Ionkov */ 4296a3124a3SLatchesar Ionkov 43060e78d2cSAbhishek Kulkarni 43160e78d2cSAbhishek Kulkarni /** 43260e78d2cSAbhishek Kulkarni * v9fs_clear_inode - release an inode 43360e78d2cSAbhishek Kulkarni * @inode: inode to release 43460e78d2cSAbhishek Kulkarni * 43560e78d2cSAbhishek Kulkarni */ 436b57922d9SAl Viro void v9fs_evict_inode(struct inode *inode) 43760e78d2cSAbhishek Kulkarni { 4386b39f6d2SAneesh Kumar K.V struct v9fs_inode *v9inode = V9FS_I(inode); 4396b39f6d2SAneesh Kumar K.V 440b57922d9SAl Viro truncate_inode_pages(inode->i_mapping, 0); 441b57922d9SAl Viro end_writeback(inode); 44260e78d2cSAbhishek Kulkarni filemap_fdatawrite(inode->i_mapping); 44360e78d2cSAbhishek Kulkarni 44460e78d2cSAbhishek Kulkarni #ifdef CONFIG_9P_FSCACHE 44560e78d2cSAbhishek Kulkarni v9fs_cache_inode_put_cookie(inode); 44660e78d2cSAbhishek Kulkarni #endif 4476b39f6d2SAneesh Kumar K.V /* clunk the fid stashed in writeback_fid */ 4486b39f6d2SAneesh Kumar K.V if (v9inode->writeback_fid) { 4496b39f6d2SAneesh Kumar K.V p9_client_clunk(v9inode->writeback_fid); 4506b39f6d2SAneesh Kumar K.V v9inode->writeback_fid = NULL; 4513cf387d7SAneesh Kumar K.V } 45260e78d2cSAbhishek Kulkarni } 45360e78d2cSAbhishek Kulkarni 454fd2421f5SAneesh Kumar K.V static int v9fs_test_inode(struct inode *inode, void *data) 455fd2421f5SAneesh Kumar K.V { 456fd2421f5SAneesh Kumar K.V int umode; 45745089142SAneesh Kumar K.V dev_t rdev; 458fd2421f5SAneesh Kumar K.V struct v9fs_inode *v9inode = V9FS_I(inode); 459fd2421f5SAneesh Kumar K.V struct p9_wstat *st = (struct p9_wstat *)data; 460fd2421f5SAneesh Kumar K.V struct v9fs_session_info *v9ses = v9fs_inode2v9ses(inode); 461fd2421f5SAneesh Kumar K.V 46245089142SAneesh Kumar K.V umode = p9mode2unixmode(v9ses, st, &rdev); 463fd2421f5SAneesh Kumar K.V /* don't match inode of different type */ 464fd2421f5SAneesh Kumar K.V if ((inode->i_mode & S_IFMT) != (umode & S_IFMT)) 465fd2421f5SAneesh Kumar K.V return 0; 466fd2421f5SAneesh Kumar K.V 467fd2421f5SAneesh Kumar K.V /* compare qid details */ 468fd2421f5SAneesh Kumar K.V if (memcmp(&v9inode->qid.version, 469fd2421f5SAneesh Kumar K.V &st->qid.version, sizeof(v9inode->qid.version))) 470fd2421f5SAneesh Kumar K.V return 0; 471fd2421f5SAneesh Kumar K.V 472fd2421f5SAneesh Kumar K.V if (v9inode->qid.type != st->qid.type) 473fd2421f5SAneesh Kumar K.V return 0; 474fd2421f5SAneesh Kumar K.V return 1; 475fd2421f5SAneesh Kumar K.V } 476fd2421f5SAneesh Kumar K.V 477ed80fcfaSAneesh Kumar K.V static int v9fs_test_new_inode(struct inode *inode, void *data) 478ed80fcfaSAneesh Kumar K.V { 479ed80fcfaSAneesh Kumar K.V return 0; 480ed80fcfaSAneesh Kumar K.V } 481ed80fcfaSAneesh Kumar K.V 482fd2421f5SAneesh Kumar K.V static int v9fs_set_inode(struct inode *inode, void *data) 483fd2421f5SAneesh Kumar K.V { 484fd2421f5SAneesh Kumar K.V struct v9fs_inode *v9inode = V9FS_I(inode); 485fd2421f5SAneesh Kumar K.V struct p9_wstat *st = (struct p9_wstat *)data; 486fd2421f5SAneesh Kumar K.V 487fd2421f5SAneesh Kumar K.V memcpy(&v9inode->qid, &st->qid, sizeof(st->qid)); 488fd2421f5SAneesh Kumar K.V return 0; 489fd2421f5SAneesh Kumar K.V } 490fd2421f5SAneesh Kumar K.V 4915ffc0cb3SAneesh Kumar K.V static struct inode *v9fs_qid_iget(struct super_block *sb, 4925ffc0cb3SAneesh Kumar K.V struct p9_qid *qid, 493ed80fcfaSAneesh Kumar K.V struct p9_wstat *st, 494ed80fcfaSAneesh Kumar K.V int new) 4955ffc0cb3SAneesh Kumar K.V { 49645089142SAneesh Kumar K.V dev_t rdev; 4975ffc0cb3SAneesh Kumar K.V int retval, umode; 4985ffc0cb3SAneesh Kumar K.V unsigned long i_ino; 4995ffc0cb3SAneesh Kumar K.V struct inode *inode; 5005ffc0cb3SAneesh Kumar K.V struct v9fs_session_info *v9ses = sb->s_fs_info; 501ed80fcfaSAneesh Kumar K.V int (*test)(struct inode *, void *); 502ed80fcfaSAneesh Kumar K.V 503ed80fcfaSAneesh Kumar K.V if (new) 504ed80fcfaSAneesh Kumar K.V test = v9fs_test_new_inode; 505ed80fcfaSAneesh Kumar K.V else 506ed80fcfaSAneesh Kumar K.V test = v9fs_test_inode; 5075ffc0cb3SAneesh Kumar K.V 5085ffc0cb3SAneesh Kumar K.V i_ino = v9fs_qid2ino(qid); 509ed80fcfaSAneesh Kumar K.V inode = iget5_locked(sb, i_ino, test, v9fs_set_inode, st); 5105ffc0cb3SAneesh Kumar K.V if (!inode) 5115ffc0cb3SAneesh Kumar K.V return ERR_PTR(-ENOMEM); 5125ffc0cb3SAneesh Kumar K.V if (!(inode->i_state & I_NEW)) 5135ffc0cb3SAneesh Kumar K.V return inode; 5145ffc0cb3SAneesh Kumar K.V /* 5155ffc0cb3SAneesh Kumar K.V * initialize the inode with the stat info 5165ffc0cb3SAneesh Kumar K.V * FIXME!! we may need support for stale inodes 5175ffc0cb3SAneesh Kumar K.V * later. 5185ffc0cb3SAneesh Kumar K.V */ 519fd2421f5SAneesh Kumar K.V inode->i_ino = i_ino; 52045089142SAneesh Kumar K.V umode = p9mode2unixmode(v9ses, st, &rdev); 52145089142SAneesh Kumar K.V retval = v9fs_init_inode(v9ses, inode, umode, rdev); 5225ffc0cb3SAneesh Kumar K.V if (retval) 5235ffc0cb3SAneesh Kumar K.V goto error; 5245ffc0cb3SAneesh Kumar K.V 5255ffc0cb3SAneesh Kumar K.V v9fs_stat2inode(st, inode, sb); 5265ffc0cb3SAneesh Kumar K.V #ifdef CONFIG_9P_FSCACHE 5275ffc0cb3SAneesh Kumar K.V v9fs_cache_inode_get_cookie(inode); 5285ffc0cb3SAneesh Kumar K.V #endif 5295ffc0cb3SAneesh Kumar K.V unlock_new_inode(inode); 5305ffc0cb3SAneesh Kumar K.V return inode; 5315ffc0cb3SAneesh Kumar K.V error: 5325ffc0cb3SAneesh Kumar K.V unlock_new_inode(inode); 5335ffc0cb3SAneesh Kumar K.V iput(inode); 5345ffc0cb3SAneesh Kumar K.V return ERR_PTR(retval); 5355ffc0cb3SAneesh Kumar K.V 5365ffc0cb3SAneesh Kumar K.V } 5375ffc0cb3SAneesh Kumar K.V 53853c06f4eSAneesh Kumar K.V struct inode * 539a78ce05dSAneesh Kumar K.V v9fs_inode_from_fid(struct v9fs_session_info *v9ses, struct p9_fid *fid, 540ed80fcfaSAneesh Kumar K.V struct super_block *sb, int new) 5416a3124a3SLatchesar Ionkov { 54251a87c55SEric Van Hensbergen struct p9_wstat *st; 5435ffc0cb3SAneesh Kumar K.V struct inode *inode = NULL; 5446a3124a3SLatchesar Ionkov 545bd238fb4SLatchesar Ionkov st = p9_client_stat(fid); 54602bc3567SAbhishek Kulkarni if (IS_ERR(st)) 54702bc3567SAbhishek Kulkarni return ERR_CAST(st); 5482bad8471SEric Van Hensbergen 549ed80fcfaSAneesh Kumar K.V inode = v9fs_qid_iget(sb, &st->qid, st, new); 55002bc3567SAbhishek Kulkarni p9stat_free(st); 551bd238fb4SLatchesar Ionkov kfree(st); 5525ffc0cb3SAneesh Kumar K.V return inode; 5532bad8471SEric Van Hensbergen } 5542bad8471SEric Van Hensbergen 5552bad8471SEric Van Hensbergen /** 5562bad8471SEric Van Hensbergen * v9fs_remove - helper function to remove files and directories 55773c592b9SEric Van Hensbergen * @dir: directory inode that is being deleted 55848e370ffSAneesh Kumar K.V * @dentry: dentry that is being deleted 55973c592b9SEric Van Hensbergen * @rmdir: removing a directory 5602bad8471SEric Van Hensbergen * 5612bad8471SEric Van Hensbergen */ 5622bad8471SEric Van Hensbergen 56348e370ffSAneesh Kumar K.V static int v9fs_remove(struct inode *dir, struct dentry *dentry, int flags) 5642bad8471SEric Van Hensbergen { 56548e370ffSAneesh Kumar K.V struct inode *inode; 56648e370ffSAneesh Kumar K.V int retval = -EOPNOTSUPP; 56748e370ffSAneesh Kumar K.V struct p9_fid *v9fid, *dfid; 56848e370ffSAneesh Kumar K.V struct v9fs_session_info *v9ses; 5692bad8471SEric Van Hensbergen 57048e370ffSAneesh Kumar K.V P9_DPRINTK(P9_DEBUG_VFS, "inode: %p dentry: %p rmdir: %x\n", 57148e370ffSAneesh Kumar K.V dir, dentry, flags); 5722bad8471SEric Van Hensbergen 57348e370ffSAneesh Kumar K.V v9ses = v9fs_inode2v9ses(dir); 57448e370ffSAneesh Kumar K.V inode = dentry->d_inode; 57548e370ffSAneesh Kumar K.V dfid = v9fs_fid_lookup(dentry->d_parent); 57648e370ffSAneesh Kumar K.V if (IS_ERR(dfid)) { 57748e370ffSAneesh Kumar K.V retval = PTR_ERR(dfid); 57848e370ffSAneesh Kumar K.V P9_DPRINTK(P9_DEBUG_VFS, "fid lookup failed %d\n", retval); 57948e370ffSAneesh Kumar K.V return retval; 58048e370ffSAneesh Kumar K.V } 58148e370ffSAneesh Kumar K.V if (v9fs_proto_dotl(v9ses)) 58248e370ffSAneesh Kumar K.V retval = p9_client_unlinkat(dfid, dentry->d_name.name, flags); 58348e370ffSAneesh Kumar K.V if (retval == -EOPNOTSUPP) { 58448e370ffSAneesh Kumar K.V /* Try the one based on path */ 58548e370ffSAneesh Kumar K.V v9fid = v9fs_fid_clone(dentry); 586da977b2cSEric Van Hensbergen if (IS_ERR(v9fid)) 587da977b2cSEric Van Hensbergen return PTR_ERR(v9fid); 588d994f405SAneesh Kumar K.V retval = p9_client_remove(v9fid); 58948e370ffSAneesh Kumar K.V } 590b271ec47SAneesh Kumar K.V if (!retval) { 591b271ec47SAneesh Kumar K.V /* 592b271ec47SAneesh Kumar K.V * directories on unlink should have zero 593b271ec47SAneesh Kumar K.V * link count 594b271ec47SAneesh Kumar K.V */ 59548e370ffSAneesh Kumar K.V if (flags & AT_REMOVEDIR) { 59648e370ffSAneesh Kumar K.V clear_nlink(inode); 597b271ec47SAneesh Kumar K.V drop_nlink(dir); 598b271ec47SAneesh Kumar K.V } else 59948e370ffSAneesh Kumar K.V drop_nlink(inode); 600d28c61f0SAneesh Kumar K.V 60148e370ffSAneesh Kumar K.V v9fs_invalidate_inode_attr(inode); 602d28c61f0SAneesh Kumar K.V v9fs_invalidate_inode_attr(dir); 603b271ec47SAneesh Kumar K.V } 604d994f405SAneesh Kumar K.V return retval; 6052bad8471SEric Van Hensbergen } 6062bad8471SEric Van Hensbergen 607bd238fb4SLatchesar Ionkov /** 608bd238fb4SLatchesar Ionkov * v9fs_create - Create a file 609ee443996SEric Van Hensbergen * @v9ses: session information 610ee443996SEric Van Hensbergen * @dir: directory that dentry is being created in 611bd238fb4SLatchesar Ionkov * @dentry: dentry that is being created 6120e15597eSAbhishek Kulkarni * @extension: 9p2000.u extension string to support devices, etc. 613bd238fb4SLatchesar Ionkov * @perm: create permissions 614bd238fb4SLatchesar Ionkov * @mode: open mode 615bd238fb4SLatchesar Ionkov * 616bd238fb4SLatchesar Ionkov */ 617bd238fb4SLatchesar Ionkov static struct p9_fid * 618bd238fb4SLatchesar Ionkov v9fs_create(struct v9fs_session_info *v9ses, struct inode *dir, 619bd238fb4SLatchesar Ionkov struct dentry *dentry, char *extension, u32 perm, u8 mode) 620bd238fb4SLatchesar Ionkov { 621bd238fb4SLatchesar Ionkov int err; 622bd238fb4SLatchesar Ionkov char *name; 623bd238fb4SLatchesar Ionkov struct p9_fid *dfid, *ofid, *fid; 624bd238fb4SLatchesar Ionkov struct inode *inode; 625bd238fb4SLatchesar Ionkov 62651a87c55SEric Van Hensbergen P9_DPRINTK(P9_DEBUG_VFS, "name %s\n", dentry->d_name.name); 62751a87c55SEric Van Hensbergen 628bd238fb4SLatchesar Ionkov err = 0; 629bd238fb4SLatchesar Ionkov ofid = NULL; 630bd238fb4SLatchesar Ionkov fid = NULL; 631bd238fb4SLatchesar Ionkov name = (char *) dentry->d_name.name; 6326d27e64dSVenkateswararao Jujjuri dfid = v9fs_fid_lookup(dentry->d_parent); 633bd238fb4SLatchesar Ionkov if (IS_ERR(dfid)) { 634bd238fb4SLatchesar Ionkov err = PTR_ERR(dfid); 6356d27e64dSVenkateswararao Jujjuri P9_DPRINTK(P9_DEBUG_VFS, "fid lookup failed %d\n", err); 6366d27e64dSVenkateswararao Jujjuri return ERR_PTR(err); 637bd238fb4SLatchesar Ionkov } 638bd238fb4SLatchesar Ionkov 639bd238fb4SLatchesar Ionkov /* clone a fid to use for creation */ 640bd238fb4SLatchesar Ionkov ofid = p9_client_walk(dfid, 0, NULL, 1); 641bd238fb4SLatchesar Ionkov if (IS_ERR(ofid)) { 642bd238fb4SLatchesar Ionkov err = PTR_ERR(ofid); 64351a87c55SEric Van Hensbergen P9_DPRINTK(P9_DEBUG_VFS, "p9_client_walk failed %d\n", err); 6446d27e64dSVenkateswararao Jujjuri return ERR_PTR(err); 645bd238fb4SLatchesar Ionkov } 646bd238fb4SLatchesar Ionkov 647bd238fb4SLatchesar Ionkov err = p9_client_fcreate(ofid, name, perm, mode, extension); 64851a87c55SEric Van Hensbergen if (err < 0) { 64951a87c55SEric Van Hensbergen P9_DPRINTK(P9_DEBUG_VFS, "p9_client_fcreate failed %d\n", err); 650bd238fb4SLatchesar Ionkov goto error; 65151a87c55SEric Van Hensbergen } 652bd238fb4SLatchesar Ionkov 653bd238fb4SLatchesar Ionkov /* now walk from the parent so we can get unopened fid */ 6546d27e64dSVenkateswararao Jujjuri fid = p9_client_walk(dfid, 1, &name, 1); 655bd238fb4SLatchesar Ionkov if (IS_ERR(fid)) { 656bd238fb4SLatchesar Ionkov err = PTR_ERR(fid); 65751a87c55SEric Van Hensbergen P9_DPRINTK(P9_DEBUG_VFS, "p9_client_walk failed %d\n", err); 658bd238fb4SLatchesar Ionkov fid = NULL; 659bd238fb4SLatchesar Ionkov goto error; 6606d27e64dSVenkateswararao Jujjuri } 661bd238fb4SLatchesar Ionkov 662bd238fb4SLatchesar Ionkov /* instantiate inode and assign the unopened fid to the dentry */ 663ed80fcfaSAneesh Kumar K.V inode = v9fs_get_new_inode_from_fid(v9ses, fid, dir->i_sb); 664bd238fb4SLatchesar Ionkov if (IS_ERR(inode)) { 665bd238fb4SLatchesar Ionkov err = PTR_ERR(inode); 66651a87c55SEric Van Hensbergen P9_DPRINTK(P9_DEBUG_VFS, "inode creation failed %d\n", err); 667bd238fb4SLatchesar Ionkov goto error; 668bd238fb4SLatchesar Ionkov } 66950fb6d2bSAbhishek Kulkarni err = v9fs_fid_add(dentry, fid); 67050fb6d2bSAbhishek Kulkarni if (err < 0) 67150fb6d2bSAbhishek Kulkarni goto error; 6725441ae5eSAneesh Kumar K.V d_instantiate(dentry, inode); 673bd238fb4SLatchesar Ionkov return ofid; 674bd238fb4SLatchesar Ionkov error: 675bd238fb4SLatchesar Ionkov if (ofid) 676bd238fb4SLatchesar Ionkov p9_client_clunk(ofid); 677bd238fb4SLatchesar Ionkov 678bd238fb4SLatchesar Ionkov if (fid) 679bd238fb4SLatchesar Ionkov p9_client_clunk(fid); 680bd238fb4SLatchesar Ionkov 681bd238fb4SLatchesar Ionkov return ERR_PTR(err); 682bd238fb4SLatchesar Ionkov } 683bd238fb4SLatchesar Ionkov 6842bad8471SEric Van Hensbergen /** 6852bad8471SEric Van Hensbergen * v9fs_vfs_create - VFS hook to create files 686ee443996SEric Van Hensbergen * @dir: directory inode that is being created 6872bad8471SEric Van Hensbergen * @dentry: dentry that is being deleted 6886a3124a3SLatchesar Ionkov * @mode: create permissions 6892bad8471SEric Van Hensbergen * @nd: path information 6902bad8471SEric Van Hensbergen * 6912bad8471SEric Van Hensbergen */ 6922bad8471SEric Van Hensbergen 6932bad8471SEric Van Hensbergen static int 6946a3124a3SLatchesar Ionkov v9fs_vfs_create(struct inode *dir, struct dentry *dentry, int mode, 6952bad8471SEric Van Hensbergen struct nameidata *nd) 6962bad8471SEric Van Hensbergen { 6976a3124a3SLatchesar Ionkov int err; 698bd238fb4SLatchesar Ionkov u32 perm; 6996a3124a3SLatchesar Ionkov int flags; 7006b39f6d2SAneesh Kumar K.V struct file *filp; 7016b39f6d2SAneesh Kumar K.V struct v9fs_inode *v9inode; 7026a3124a3SLatchesar Ionkov struct v9fs_session_info *v9ses; 7033cf387d7SAneesh Kumar K.V struct p9_fid *fid, *inode_fid; 7046a3124a3SLatchesar Ionkov 705bd238fb4SLatchesar Ionkov err = 0; 706bd238fb4SLatchesar Ionkov fid = NULL; 7076a3124a3SLatchesar Ionkov v9ses = v9fs_inode2v9ses(dir); 708da977b2cSEric Van Hensbergen perm = unixmode2p9mode(v9ses, mode); 709dd7dd556SAl Viro if (nd) 7108a5e929dSAl Viro flags = nd->intent.open.flags; 7116a3124a3SLatchesar Ionkov else 7126a3124a3SLatchesar Ionkov flags = O_RDWR; 7136a3124a3SLatchesar Ionkov 714bd238fb4SLatchesar Ionkov fid = v9fs_create(v9ses, dir, dentry, NULL, perm, 715dd6102fbSSripathi Kodi v9fs_uflags2omode(flags, 716dd6102fbSSripathi Kodi v9fs_proto_dotu(v9ses))); 717bd238fb4SLatchesar Ionkov if (IS_ERR(fid)) { 718bd238fb4SLatchesar Ionkov err = PTR_ERR(fid); 719bd238fb4SLatchesar Ionkov fid = NULL; 7206a3124a3SLatchesar Ionkov goto error; 7216a3124a3SLatchesar Ionkov } 7226a3124a3SLatchesar Ionkov 723d28c61f0SAneesh Kumar K.V v9fs_invalidate_inode_attr(dir); 724bd238fb4SLatchesar Ionkov /* if we are opening a file, assign the open fid to the file */ 725dd7dd556SAl Viro if (nd) { 7266b39f6d2SAneesh Kumar K.V v9inode = V9FS_I(dentry->d_inode); 7275a7e0a8cSAneesh Kumar K.V mutex_lock(&v9inode->v_mutex); 7287add697aSAneesh Kumar K.V if (v9ses->cache && !v9inode->writeback_fid && 7297add697aSAneesh Kumar K.V ((flags & O_ACCMODE) != O_RDONLY)) { 7303cf387d7SAneesh Kumar K.V /* 7316b39f6d2SAneesh Kumar K.V * clone a fid and add it to writeback_fid 7323cf387d7SAneesh Kumar K.V * we do it during open time instead of 7333cf387d7SAneesh Kumar K.V * page dirty time via write_begin/page_mkwrite 7343cf387d7SAneesh Kumar K.V * because we want write after unlink usecase 7353cf387d7SAneesh Kumar K.V * to work. 7363cf387d7SAneesh Kumar K.V */ 7373cf387d7SAneesh Kumar K.V inode_fid = v9fs_writeback_fid(dentry); 7383cf387d7SAneesh Kumar K.V if (IS_ERR(inode_fid)) { 7393cf387d7SAneesh Kumar K.V err = PTR_ERR(inode_fid); 7405a7e0a8cSAneesh Kumar K.V mutex_unlock(&v9inode->v_mutex); 7413cf387d7SAneesh Kumar K.V goto error; 7423cf387d7SAneesh Kumar K.V } 7436b39f6d2SAneesh Kumar K.V v9inode->writeback_fid = (void *) inode_fid; 7443cf387d7SAneesh Kumar K.V } 7455a7e0a8cSAneesh Kumar K.V mutex_unlock(&v9inode->v_mutex); 746877cb3d4SAneesh Kumar K.V filp = lookup_instantiate_filp(nd, dentry, generic_file_open); 7476a3124a3SLatchesar Ionkov if (IS_ERR(filp)) { 748bd238fb4SLatchesar Ionkov err = PTR_ERR(filp); 749bd238fb4SLatchesar Ionkov goto error; 7506a3124a3SLatchesar Ionkov } 7516a3124a3SLatchesar Ionkov 752bd238fb4SLatchesar Ionkov filp->private_data = fid; 75346848de0SAneesh Kumar K.V #ifdef CONFIG_9P_FSCACHE 75446848de0SAneesh Kumar K.V if (v9ses->cache) 75546848de0SAneesh Kumar K.V v9fs_cache_inode_set_cookie(dentry->d_inode, filp); 75646848de0SAneesh Kumar K.V #endif 757bd238fb4SLatchesar Ionkov } else 758bd238fb4SLatchesar Ionkov p9_client_clunk(fid); 7596a3124a3SLatchesar Ionkov 7606a3124a3SLatchesar Ionkov return 0; 7616a3124a3SLatchesar Ionkov 7626a3124a3SLatchesar Ionkov error: 763bd238fb4SLatchesar Ionkov if (fid) 764bd238fb4SLatchesar Ionkov p9_client_clunk(fid); 7656a3124a3SLatchesar Ionkov 7666a3124a3SLatchesar Ionkov return err; 7672bad8471SEric Van Hensbergen } 7682bad8471SEric Van Hensbergen 7692bad8471SEric Van Hensbergen /** 7702bad8471SEric Van Hensbergen * v9fs_vfs_mkdir - VFS mkdir hook to create a directory 771ee443996SEric Van Hensbergen * @dir: inode that is being unlinked 7722bad8471SEric Van Hensbergen * @dentry: dentry that is being unlinked 7732bad8471SEric Van Hensbergen * @mode: mode for new directory 7742bad8471SEric Van Hensbergen * 7752bad8471SEric Van Hensbergen */ 7762bad8471SEric Van Hensbergen 7776a3124a3SLatchesar Ionkov static int v9fs_vfs_mkdir(struct inode *dir, struct dentry *dentry, int mode) 7782bad8471SEric Van Hensbergen { 7796a3124a3SLatchesar Ionkov int err; 780bd238fb4SLatchesar Ionkov u32 perm; 781bd238fb4SLatchesar Ionkov struct p9_fid *fid; 782d28c61f0SAneesh Kumar K.V struct v9fs_session_info *v9ses; 7836a3124a3SLatchesar Ionkov 784bd238fb4SLatchesar Ionkov P9_DPRINTK(P9_DEBUG_VFS, "name %s\n", dentry->d_name.name); 785bd238fb4SLatchesar Ionkov err = 0; 7866a3124a3SLatchesar Ionkov v9ses = v9fs_inode2v9ses(dir); 7876a3124a3SLatchesar Ionkov perm = unixmode2p9mode(v9ses, mode | S_IFDIR); 788bd238fb4SLatchesar Ionkov fid = v9fs_create(v9ses, dir, dentry, NULL, perm, P9_OREAD); 789bd238fb4SLatchesar Ionkov if (IS_ERR(fid)) { 790bd238fb4SLatchesar Ionkov err = PTR_ERR(fid); 791bd238fb4SLatchesar Ionkov fid = NULL; 792d28c61f0SAneesh Kumar K.V } else { 793b271ec47SAneesh Kumar K.V inc_nlink(dir); 794d28c61f0SAneesh Kumar K.V v9fs_invalidate_inode_attr(dir); 795d28c61f0SAneesh Kumar K.V } 7966a3124a3SLatchesar Ionkov 797bd238fb4SLatchesar Ionkov if (fid) 798bd238fb4SLatchesar Ionkov p9_client_clunk(fid); 7996a3124a3SLatchesar Ionkov 8006a3124a3SLatchesar Ionkov return err; 8012bad8471SEric Van Hensbergen } 8022bad8471SEric Van Hensbergen 8032bad8471SEric Van Hensbergen /** 8042bad8471SEric Van Hensbergen * v9fs_vfs_lookup - VFS lookup hook to "walk" to a new inode 8052bad8471SEric Van Hensbergen * @dir: inode that is being walked from 8062bad8471SEric Van Hensbergen * @dentry: dentry that is being walked to? 8072bad8471SEric Van Hensbergen * @nameidata: path data 8082bad8471SEric Van Hensbergen * 8092bad8471SEric Van Hensbergen */ 8102bad8471SEric Van Hensbergen 81153c06f4eSAneesh Kumar K.V struct dentry *v9fs_vfs_lookup(struct inode *dir, struct dentry *dentry, 8122bad8471SEric Van Hensbergen struct nameidata *nameidata) 8132bad8471SEric Van Hensbergen { 8142bad8471SEric Van Hensbergen struct super_block *sb; 8152bad8471SEric Van Hensbergen struct v9fs_session_info *v9ses; 816bd238fb4SLatchesar Ionkov struct p9_fid *dfid, *fid; 8172bad8471SEric Van Hensbergen struct inode *inode; 818bd238fb4SLatchesar Ionkov char *name; 8192bad8471SEric Van Hensbergen int result = 0; 8202bad8471SEric Van Hensbergen 821bd238fb4SLatchesar Ionkov P9_DPRINTK(P9_DEBUG_VFS, "dir: %p dentry: (%s) %p nameidata: %p\n", 822731805b4SLatchesar Ionkov dir, dentry->d_name.name, dentry, nameidata); 8232bad8471SEric Van Hensbergen 82411e9b49bSSripathi Kodi if (dentry->d_name.len > NAME_MAX) 82511e9b49bSSripathi Kodi return ERR_PTR(-ENAMETOOLONG); 82611e9b49bSSripathi Kodi 8272bad8471SEric Van Hensbergen sb = dir->i_sb; 8282bad8471SEric Van Hensbergen v9ses = v9fs_inode2v9ses(dir); 829a534c8d1SAneesh Kumar K.V /* We can walk d_parent because we hold the dir->i_mutex */ 830bd238fb4SLatchesar Ionkov dfid = v9fs_fid_lookup(dentry->d_parent); 831bd238fb4SLatchesar Ionkov if (IS_ERR(dfid)) 832e231c2eeSDavid Howells return ERR_CAST(dfid); 8332bad8471SEric Van Hensbergen 834bd238fb4SLatchesar Ionkov name = (char *) dentry->d_name.name; 835bd238fb4SLatchesar Ionkov fid = p9_client_walk(dfid, 1, &name, 1); 836bd238fb4SLatchesar Ionkov if (IS_ERR(fid)) { 837bd238fb4SLatchesar Ionkov result = PTR_ERR(fid); 8382bad8471SEric Van Hensbergen if (result == -ENOENT) { 83985e0df24SAneesh Kumar K.V inode = NULL; 84085e0df24SAneesh Kumar K.V goto inst_out; 8412bad8471SEric Van Hensbergen } 8422bad8471SEric Van Hensbergen 843bd238fb4SLatchesar Ionkov return ERR_PTR(result); 8442bad8471SEric Van Hensbergen } 8452bad8471SEric Van Hensbergen 846a78ce05dSAneesh Kumar K.V inode = v9fs_get_inode_from_fid(v9ses, fid, dir->i_sb); 847bd238fb4SLatchesar Ionkov if (IS_ERR(inode)) { 848bd238fb4SLatchesar Ionkov result = PTR_ERR(inode); 849bd238fb4SLatchesar Ionkov inode = NULL; 850bd238fb4SLatchesar Ionkov goto error; 8512bad8471SEric Van Hensbergen } 8522bad8471SEric Van Hensbergen 853bd238fb4SLatchesar Ionkov result = v9fs_fid_add(dentry, fid); 8546a3124a3SLatchesar Ionkov if (result < 0) 8559856af8bSAneesh Kumar K.V goto error_iput; 8566a3124a3SLatchesar Ionkov 85785e0df24SAneesh Kumar K.V inst_out: 8582bad8471SEric Van Hensbergen d_add(dentry, inode); 8592bad8471SEric Van Hensbergen return NULL; 8602bad8471SEric Van Hensbergen 8619856af8bSAneesh Kumar K.V error_iput: 8629856af8bSAneesh Kumar K.V iput(inode); 863bd238fb4SLatchesar Ionkov error: 864bd238fb4SLatchesar Ionkov p9_client_clunk(fid); 865da977b2cSEric Van Hensbergen 8662bad8471SEric Van Hensbergen return ERR_PTR(result); 8672bad8471SEric Van Hensbergen } 8682bad8471SEric Van Hensbergen 8692bad8471SEric Van Hensbergen /** 8702bad8471SEric Van Hensbergen * v9fs_vfs_unlink - VFS unlink hook to delete an inode 8712bad8471SEric Van Hensbergen * @i: inode that is being unlinked 87273c592b9SEric Van Hensbergen * @d: dentry that is being unlinked 8732bad8471SEric Van Hensbergen * 8742bad8471SEric Van Hensbergen */ 8752bad8471SEric Van Hensbergen 87653c06f4eSAneesh Kumar K.V int v9fs_vfs_unlink(struct inode *i, struct dentry *d) 8772bad8471SEric Van Hensbergen { 8782bad8471SEric Van Hensbergen return v9fs_remove(i, d, 0); 8792bad8471SEric Van Hensbergen } 8802bad8471SEric Van Hensbergen 8812bad8471SEric Van Hensbergen /** 8822bad8471SEric Van Hensbergen * v9fs_vfs_rmdir - VFS unlink hook to delete a directory 8832bad8471SEric Van Hensbergen * @i: inode that is being unlinked 88473c592b9SEric Van Hensbergen * @d: dentry that is being unlinked 8852bad8471SEric Van Hensbergen * 8862bad8471SEric Van Hensbergen */ 8872bad8471SEric Van Hensbergen 88853c06f4eSAneesh Kumar K.V int v9fs_vfs_rmdir(struct inode *i, struct dentry *d) 8892bad8471SEric Van Hensbergen { 89048e370ffSAneesh Kumar K.V return v9fs_remove(i, d, AT_REMOVEDIR); 8912bad8471SEric Van Hensbergen } 8922bad8471SEric Van Hensbergen 8932bad8471SEric Van Hensbergen /** 8942bad8471SEric Van Hensbergen * v9fs_vfs_rename - VFS hook to rename an inode 8952bad8471SEric Van Hensbergen * @old_dir: old dir inode 8962bad8471SEric Van Hensbergen * @old_dentry: old dentry 8972bad8471SEric Van Hensbergen * @new_dir: new dir inode 8982bad8471SEric Van Hensbergen * @new_dentry: new dentry 8992bad8471SEric Van Hensbergen * 9002bad8471SEric Van Hensbergen */ 9012bad8471SEric Van Hensbergen 90253c06f4eSAneesh Kumar K.V int 9032bad8471SEric Van Hensbergen v9fs_vfs_rename(struct inode *old_dir, struct dentry *old_dentry, 9042bad8471SEric Van Hensbergen struct inode *new_dir, struct dentry *new_dentry) 9052bad8471SEric Van Hensbergen { 906d28c61f0SAneesh Kumar K.V int retval; 907bd238fb4SLatchesar Ionkov struct inode *old_inode; 908b271ec47SAneesh Kumar K.V struct inode *new_inode; 909bd238fb4SLatchesar Ionkov struct v9fs_session_info *v9ses; 910bd238fb4SLatchesar Ionkov struct p9_fid *oldfid; 911bd238fb4SLatchesar Ionkov struct p9_fid *olddirfid; 912bd238fb4SLatchesar Ionkov struct p9_fid *newdirfid; 913bd238fb4SLatchesar Ionkov struct p9_wstat wstat; 9142bad8471SEric Van Hensbergen 915bd238fb4SLatchesar Ionkov P9_DPRINTK(P9_DEBUG_VFS, "\n"); 916bd238fb4SLatchesar Ionkov retval = 0; 917bd238fb4SLatchesar Ionkov old_inode = old_dentry->d_inode; 918b271ec47SAneesh Kumar K.V new_inode = new_dentry->d_inode; 919bd238fb4SLatchesar Ionkov v9ses = v9fs_inode2v9ses(old_inode); 920bd238fb4SLatchesar Ionkov oldfid = v9fs_fid_lookup(old_dentry); 921da977b2cSEric Van Hensbergen if (IS_ERR(oldfid)) 922da977b2cSEric Van Hensbergen return PTR_ERR(oldfid); 923da977b2cSEric Van Hensbergen 924da977b2cSEric Van Hensbergen olddirfid = v9fs_fid_clone(old_dentry->d_parent); 925da977b2cSEric Van Hensbergen if (IS_ERR(olddirfid)) { 926da977b2cSEric Van Hensbergen retval = PTR_ERR(olddirfid); 927bd238fb4SLatchesar Ionkov goto done; 928da977b2cSEric Van Hensbergen } 929da977b2cSEric Van Hensbergen 930da977b2cSEric Van Hensbergen newdirfid = v9fs_fid_clone(new_dentry->d_parent); 931da977b2cSEric Van Hensbergen if (IS_ERR(newdirfid)) { 932da977b2cSEric Van Hensbergen retval = PTR_ERR(newdirfid); 933bd238fb4SLatchesar Ionkov goto clunk_olddir; 9342bad8471SEric Van Hensbergen } 9352bad8471SEric Van Hensbergen 936a534c8d1SAneesh Kumar K.V down_write(&v9ses->rename_sem); 9374681dbdaSSripathi Kodi if (v9fs_proto_dotl(v9ses)) { 9389e8fb38eSAneesh Kumar K.V retval = p9_client_renameat(olddirfid, old_dentry->d_name.name, 9399e8fb38eSAneesh Kumar K.V newdirfid, new_dentry->d_name.name); 9409e8fb38eSAneesh Kumar K.V if (retval == -EOPNOTSUPP) 9414681dbdaSSripathi Kodi retval = p9_client_rename(oldfid, newdirfid, 9429e8fb38eSAneesh Kumar K.V new_dentry->d_name.name); 9439e8fb38eSAneesh Kumar K.V if (retval != -EOPNOTSUPP) 9444681dbdaSSripathi Kodi goto clunk_newdir; 9454681dbdaSSripathi Kodi } 946a534c8d1SAneesh Kumar K.V if (old_dentry->d_parent != new_dentry->d_parent) { 947a534c8d1SAneesh Kumar K.V /* 948a534c8d1SAneesh Kumar K.V * 9P .u can only handle file rename in the same directory 949a534c8d1SAneesh Kumar K.V */ 9504681dbdaSSripathi Kodi 951bd238fb4SLatchesar Ionkov P9_DPRINTK(P9_DEBUG_ERROR, 952bd238fb4SLatchesar Ionkov "old dir and new dir are different\n"); 953621997cdSEric Van Hensbergen retval = -EXDEV; 954bd238fb4SLatchesar Ionkov goto clunk_newdir; 9552bad8471SEric Van Hensbergen } 956531b1094SLatchesar Ionkov v9fs_blank_wstat(&wstat); 957ba17674fSLatchesar Ionkov wstat.muid = v9ses->uname; 958531b1094SLatchesar Ionkov wstat.name = (char *) new_dentry->d_name.name; 959bd238fb4SLatchesar Ionkov retval = p9_client_wstat(oldfid, &wstat); 9602bad8471SEric Van Hensbergen 961bd238fb4SLatchesar Ionkov clunk_newdir: 962b271ec47SAneesh Kumar K.V if (!retval) { 963b271ec47SAneesh Kumar K.V if (new_inode) { 964b271ec47SAneesh Kumar K.V if (S_ISDIR(new_inode->i_mode)) 965b271ec47SAneesh Kumar K.V clear_nlink(new_inode); 966b271ec47SAneesh Kumar K.V else 967b271ec47SAneesh Kumar K.V drop_nlink(new_inode); 968b271ec47SAneesh Kumar K.V } 969b271ec47SAneesh Kumar K.V if (S_ISDIR(old_inode->i_mode)) { 970b271ec47SAneesh Kumar K.V if (!new_inode) 971b271ec47SAneesh Kumar K.V inc_nlink(new_dir); 972b271ec47SAneesh Kumar K.V drop_nlink(old_dir); 973b271ec47SAneesh Kumar K.V } 9743bc86de3SAneesh Kumar K.V v9fs_invalidate_inode_attr(old_inode); 975d28c61f0SAneesh Kumar K.V v9fs_invalidate_inode_attr(old_dir); 976d28c61f0SAneesh Kumar K.V v9fs_invalidate_inode_attr(new_dir); 9773bc86de3SAneesh Kumar K.V 978a534c8d1SAneesh Kumar K.V /* successful rename */ 979a534c8d1SAneesh Kumar K.V d_move(old_dentry, new_dentry); 980b271ec47SAneesh Kumar K.V } 981a534c8d1SAneesh Kumar K.V up_write(&v9ses->rename_sem); 98222150c4fSLatchesar Ionkov p9_client_clunk(newdirfid); 9832bad8471SEric Van Hensbergen 984bd238fb4SLatchesar Ionkov clunk_olddir: 98522150c4fSLatchesar Ionkov p9_client_clunk(olddirfid); 9862bad8471SEric Van Hensbergen 987bd238fb4SLatchesar Ionkov done: 9882bad8471SEric Van Hensbergen return retval; 9892bad8471SEric Van Hensbergen } 9902bad8471SEric Van Hensbergen 9912bad8471SEric Van Hensbergen /** 992943ffb58SAdrian Bunk * v9fs_vfs_getattr - retrieve file metadata 993ee443996SEric Van Hensbergen * @mnt: mount information 994ee443996SEric Van Hensbergen * @dentry: file to get attributes on 995ee443996SEric Van Hensbergen * @stat: metadata structure to populate 9962bad8471SEric Van Hensbergen * 9972bad8471SEric Van Hensbergen */ 9982bad8471SEric Van Hensbergen 9992bad8471SEric Van Hensbergen static int 10002bad8471SEric Van Hensbergen v9fs_vfs_getattr(struct vfsmount *mnt, struct dentry *dentry, 10012bad8471SEric Van Hensbergen struct kstat *stat) 10022bad8471SEric Van Hensbergen { 1003bd238fb4SLatchesar Ionkov int err; 1004bd238fb4SLatchesar Ionkov struct v9fs_session_info *v9ses; 1005bd238fb4SLatchesar Ionkov struct p9_fid *fid; 100651a87c55SEric Van Hensbergen struct p9_wstat *st; 10072bad8471SEric Van Hensbergen 1008bd238fb4SLatchesar Ionkov P9_DPRINTK(P9_DEBUG_VFS, "dentry: %p\n", dentry); 1009bd238fb4SLatchesar Ionkov err = -EPERM; 101042869c8aSAneesh Kumar K.V v9ses = v9fs_dentry2v9ses(dentry); 1011a1211908SAneesh Kumar K.V if (v9ses->cache == CACHE_LOOSE || v9ses->cache == CACHE_FSCACHE) { 1012a1211908SAneesh Kumar K.V generic_fillattr(dentry->d_inode, stat); 1013a1211908SAneesh Kumar K.V return 0; 1014a1211908SAneesh Kumar K.V } 1015bd238fb4SLatchesar Ionkov fid = v9fs_fid_lookup(dentry); 1016da977b2cSEric Van Hensbergen if (IS_ERR(fid)) 1017da977b2cSEric Van Hensbergen return PTR_ERR(fid); 10182bad8471SEric Van Hensbergen 1019bd238fb4SLatchesar Ionkov st = p9_client_stat(fid); 1020bd238fb4SLatchesar Ionkov if (IS_ERR(st)) 1021bd238fb4SLatchesar Ionkov return PTR_ERR(st); 10222bad8471SEric Van Hensbergen 1023bd238fb4SLatchesar Ionkov v9fs_stat2inode(st, dentry->d_inode, dentry->d_inode->i_sb); 10242bad8471SEric Van Hensbergen generic_fillattr(dentry->d_inode, stat); 10252bad8471SEric Van Hensbergen 102662b2be59SLatchesar Ionkov p9stat_free(st); 1027bd238fb4SLatchesar Ionkov kfree(st); 1028bd238fb4SLatchesar Ionkov return 0; 10292bad8471SEric Van Hensbergen } 10302bad8471SEric Van Hensbergen 10312bad8471SEric Van Hensbergen /** 10322bad8471SEric Van Hensbergen * v9fs_vfs_setattr - set file metadata 10332bad8471SEric Van Hensbergen * @dentry: file whose metadata to set 10342bad8471SEric Van Hensbergen * @iattr: metadata assignment structure 10352bad8471SEric Van Hensbergen * 10362bad8471SEric Van Hensbergen */ 10372bad8471SEric Van Hensbergen 10382bad8471SEric Van Hensbergen static int v9fs_vfs_setattr(struct dentry *dentry, struct iattr *iattr) 10392bad8471SEric Van Hensbergen { 1040bd238fb4SLatchesar Ionkov int retval; 1041bd238fb4SLatchesar Ionkov struct v9fs_session_info *v9ses; 1042bd238fb4SLatchesar Ionkov struct p9_fid *fid; 1043bd238fb4SLatchesar Ionkov struct p9_wstat wstat; 10442bad8471SEric Van Hensbergen 1045bd238fb4SLatchesar Ionkov P9_DPRINTK(P9_DEBUG_VFS, "\n"); 1046059c138bSAneesh Kumar K.V retval = inode_change_ok(dentry->d_inode, iattr); 1047059c138bSAneesh Kumar K.V if (retval) 1048059c138bSAneesh Kumar K.V return retval; 1049059c138bSAneesh Kumar K.V 1050bd238fb4SLatchesar Ionkov retval = -EPERM; 105142869c8aSAneesh Kumar K.V v9ses = v9fs_dentry2v9ses(dentry); 1052bd238fb4SLatchesar Ionkov fid = v9fs_fid_lookup(dentry); 1053da977b2cSEric Van Hensbergen if(IS_ERR(fid)) 1054da977b2cSEric Van Hensbergen return PTR_ERR(fid); 10552bad8471SEric Van Hensbergen 1056531b1094SLatchesar Ionkov v9fs_blank_wstat(&wstat); 10572bad8471SEric Van Hensbergen if (iattr->ia_valid & ATTR_MODE) 1058531b1094SLatchesar Ionkov wstat.mode = unixmode2p9mode(v9ses, iattr->ia_mode); 10592bad8471SEric Van Hensbergen 10602bad8471SEric Van Hensbergen if (iattr->ia_valid & ATTR_MTIME) 1061531b1094SLatchesar Ionkov wstat.mtime = iattr->ia_mtime.tv_sec; 10622bad8471SEric Van Hensbergen 10632bad8471SEric Van Hensbergen if (iattr->ia_valid & ATTR_ATIME) 1064531b1094SLatchesar Ionkov wstat.atime = iattr->ia_atime.tv_sec; 10652bad8471SEric Van Hensbergen 10662bad8471SEric Van Hensbergen if (iattr->ia_valid & ATTR_SIZE) 1067531b1094SLatchesar Ionkov wstat.length = iattr->ia_size; 10682bad8471SEric Van Hensbergen 1069dd6102fbSSripathi Kodi if (v9fs_proto_dotu(v9ses)) { 1070531b1094SLatchesar Ionkov if (iattr->ia_valid & ATTR_UID) 1071531b1094SLatchesar Ionkov wstat.n_uid = iattr->ia_uid; 10722bad8471SEric Van Hensbergen 1073531b1094SLatchesar Ionkov if (iattr->ia_valid & ATTR_GID) 1074531b1094SLatchesar Ionkov wstat.n_gid = iattr->ia_gid; 10752bad8471SEric Van Hensbergen } 1076059c138bSAneesh Kumar K.V 10773dc5436aSAneesh Kumar K.V /* Write all dirty data */ 10783dc5436aSAneesh Kumar K.V if (S_ISREG(dentry->d_inode->i_mode)) 10793dc5436aSAneesh Kumar K.V filemap_write_and_wait(dentry->d_inode->i_mapping); 10803dc5436aSAneesh Kumar K.V 1081f10fc50fSAneesh Kumar K.V retval = p9_client_wstat(fid, &wstat); 1082f10fc50fSAneesh Kumar K.V if (retval < 0) 1083f10fc50fSAneesh Kumar K.V return retval; 1084059c138bSAneesh Kumar K.V 1085059c138bSAneesh Kumar K.V if ((iattr->ia_valid & ATTR_SIZE) && 1086059c138bSAneesh Kumar K.V iattr->ia_size != i_size_read(dentry->d_inode)) 1087059c138bSAneesh Kumar K.V truncate_setsize(dentry->d_inode, iattr->ia_size); 1088059c138bSAneesh Kumar K.V 1089f10fc50fSAneesh Kumar K.V v9fs_invalidate_inode_attr(dentry->d_inode); 10901025774cSChristoph Hellwig 10911025774cSChristoph Hellwig setattr_copy(dentry->d_inode, iattr); 10921025774cSChristoph Hellwig mark_inode_dirty(dentry->d_inode); 10931025774cSChristoph Hellwig return 0; 10942bad8471SEric Van Hensbergen } 10952bad8471SEric Van Hensbergen 10962bad8471SEric Van Hensbergen /** 1097531b1094SLatchesar Ionkov * v9fs_stat2inode - populate an inode structure with mistat info 1098531b1094SLatchesar Ionkov * @stat: Plan 9 metadata (mistat) structure 10992bad8471SEric Van Hensbergen * @inode: inode to populate 11002bad8471SEric Van Hensbergen * @sb: superblock of filesystem 11012bad8471SEric Van Hensbergen * 11022bad8471SEric Van Hensbergen */ 11032bad8471SEric Van Hensbergen 11042bad8471SEric Van Hensbergen void 110551a87c55SEric Van Hensbergen v9fs_stat2inode(struct p9_wstat *stat, struct inode *inode, 11062bad8471SEric Van Hensbergen struct super_block *sb) 11072bad8471SEric Van Hensbergen { 110845089142SAneesh Kumar K.V mode_t mode; 1109531b1094SLatchesar Ionkov char ext[32]; 11105717144aSAneesh Kumar K.V char tag_name[14]; 11115717144aSAneesh Kumar K.V unsigned int i_nlink; 11122bad8471SEric Van Hensbergen struct v9fs_session_info *v9ses = sb->s_fs_info; 1113b3cbea03SAneesh Kumar K.V struct v9fs_inode *v9inode = V9FS_I(inode); 11142bad8471SEric Van Hensbergen 11152bad8471SEric Van Hensbergen inode->i_nlink = 1; 11162bad8471SEric Van Hensbergen 1117531b1094SLatchesar Ionkov inode->i_atime.tv_sec = stat->atime; 1118531b1094SLatchesar Ionkov inode->i_mtime.tv_sec = stat->mtime; 1119531b1094SLatchesar Ionkov inode->i_ctime.tv_sec = stat->mtime; 11202bad8471SEric Van Hensbergen 1121bd32b82dSLatchesar Ionkov inode->i_uid = v9ses->dfltuid; 1122bd32b82dSLatchesar Ionkov inode->i_gid = v9ses->dfltgid; 11232bad8471SEric Van Hensbergen 1124dd6102fbSSripathi Kodi if (v9fs_proto_dotu(v9ses)) { 1125531b1094SLatchesar Ionkov inode->i_uid = stat->n_uid; 1126531b1094SLatchesar Ionkov inode->i_gid = stat->n_gid; 1127531b1094SLatchesar Ionkov } 11285717144aSAneesh Kumar K.V if ((S_ISREG(inode->i_mode)) || (S_ISDIR(inode->i_mode))) { 11295717144aSAneesh Kumar K.V if (v9fs_proto_dotu(v9ses) && (stat->extension[0] != '\0')) { 11305717144aSAneesh Kumar K.V /* 11315717144aSAneesh Kumar K.V * Hadlink support got added later to 11325717144aSAneesh Kumar K.V * to the .u extension. So there can be 11335717144aSAneesh Kumar K.V * server out there that doesn't support 11345717144aSAneesh Kumar K.V * this even with .u extension. So check 11355717144aSAneesh Kumar K.V * for non NULL stat->extension 11365717144aSAneesh Kumar K.V */ 11375717144aSAneesh Kumar K.V strncpy(ext, stat->extension, sizeof(ext)); 11385717144aSAneesh Kumar K.V /* HARDLINKCOUNT %u */ 11395717144aSAneesh Kumar K.V sscanf(ext, "%13s %u", tag_name, &i_nlink); 11405717144aSAneesh Kumar K.V if (!strncmp(tag_name, "HARDLINKCOUNT", 13)) 11415717144aSAneesh Kumar K.V inode->i_nlink = i_nlink; 11425717144aSAneesh Kumar K.V } 11435717144aSAneesh Kumar K.V } 114445089142SAneesh Kumar K.V mode = stat->mode & S_IALLUGO; 114545089142SAneesh Kumar K.V mode |= inode->i_mode & ~S_IALLUGO; 114645089142SAneesh Kumar K.V inode->i_mode = mode; 11477549ae3eSAbhishek Kulkarni i_size_write(inode, stat->length); 11482bad8471SEric Van Hensbergen 1149bd238fb4SLatchesar Ionkov /* not real number of blocks, but 512 byte ones ... */ 11507549ae3eSAbhishek Kulkarni inode->i_blocks = (i_size_read(inode) + 512 - 1) >> 9; 1151b3cbea03SAneesh Kumar K.V v9inode->cache_validity &= ~V9FS_INO_INVALID_ATTR; 11522bad8471SEric Van Hensbergen } 11532bad8471SEric Van Hensbergen 11542bad8471SEric Van Hensbergen /** 11552bad8471SEric Van Hensbergen * v9fs_qid2ino - convert qid into inode number 11562bad8471SEric Van Hensbergen * @qid: qid to hash 11572bad8471SEric Van Hensbergen * 11582bad8471SEric Van Hensbergen * BUG: potential for inode number collisions? 11592bad8471SEric Van Hensbergen */ 11602bad8471SEric Van Hensbergen 1161bd238fb4SLatchesar Ionkov ino_t v9fs_qid2ino(struct p9_qid *qid) 11622bad8471SEric Van Hensbergen { 11632bad8471SEric Van Hensbergen u64 path = qid->path + 2; 11642bad8471SEric Van Hensbergen ino_t i = 0; 11652bad8471SEric Van Hensbergen 11662bad8471SEric Van Hensbergen if (sizeof(ino_t) == sizeof(path)) 11672bad8471SEric Van Hensbergen memcpy(&i, &path, sizeof(ino_t)); 11682bad8471SEric Van Hensbergen else 11692bad8471SEric Van Hensbergen i = (ino_t) (path ^ (path >> 32)); 11702bad8471SEric Van Hensbergen 11712bad8471SEric Van Hensbergen return i; 11722bad8471SEric Van Hensbergen } 11732bad8471SEric Van Hensbergen 11742bad8471SEric Van Hensbergen /** 11752bad8471SEric Van Hensbergen * v9fs_readlink - read a symlink's location (internal version) 11762bad8471SEric Van Hensbergen * @dentry: dentry for symlink 117773c592b9SEric Van Hensbergen * @buffer: buffer to load symlink location into 11782bad8471SEric Van Hensbergen * @buflen: length of buffer 11792bad8471SEric Van Hensbergen * 11802bad8471SEric Van Hensbergen */ 11812bad8471SEric Van Hensbergen 11822bad8471SEric Van Hensbergen static int v9fs_readlink(struct dentry *dentry, char *buffer, int buflen) 11832bad8471SEric Van Hensbergen { 1184bd238fb4SLatchesar Ionkov int retval; 11852bad8471SEric Van Hensbergen 1186bd238fb4SLatchesar Ionkov struct v9fs_session_info *v9ses; 1187bd238fb4SLatchesar Ionkov struct p9_fid *fid; 118851a87c55SEric Van Hensbergen struct p9_wstat *st; 11892bad8471SEric Van Hensbergen 1190bd238fb4SLatchesar Ionkov P9_DPRINTK(P9_DEBUG_VFS, " %s\n", dentry->d_name.name); 1191bd238fb4SLatchesar Ionkov retval = -EPERM; 119242869c8aSAneesh Kumar K.V v9ses = v9fs_dentry2v9ses(dentry); 1193bd238fb4SLatchesar Ionkov fid = v9fs_fid_lookup(dentry); 1194da977b2cSEric Van Hensbergen if (IS_ERR(fid)) 1195da977b2cSEric Van Hensbergen return PTR_ERR(fid); 11962bad8471SEric Van Hensbergen 1197329176ccSM. Mohan Kumar if (!v9fs_proto_dotu(v9ses)) 1198bd238fb4SLatchesar Ionkov return -EBADF; 11992bad8471SEric Van Hensbergen 1200bd238fb4SLatchesar Ionkov st = p9_client_stat(fid); 1201bd238fb4SLatchesar Ionkov if (IS_ERR(st)) 1202bd238fb4SLatchesar Ionkov return PTR_ERR(st); 12032bad8471SEric Van Hensbergen 1204bd238fb4SLatchesar Ionkov if (!(st->mode & P9_DMSYMLINK)) { 12052bad8471SEric Van Hensbergen retval = -EINVAL; 1206bd238fb4SLatchesar Ionkov goto done; 12072bad8471SEric Van Hensbergen } 12082bad8471SEric Van Hensbergen 12092bad8471SEric Van Hensbergen /* copy extension buffer into buffer */ 121051a87c55SEric Van Hensbergen strncpy(buffer, st->extension, buflen); 12112bad8471SEric Van Hensbergen 1212bd238fb4SLatchesar Ionkov P9_DPRINTK(P9_DEBUG_VFS, 121351a87c55SEric Van Hensbergen "%s -> %s (%s)\n", dentry->d_name.name, st->extension, buffer); 1214bd238fb4SLatchesar Ionkov 12152511cd0bSMartin Stava retval = strnlen(buffer, buflen); 1216bd238fb4SLatchesar Ionkov done: 121762b2be59SLatchesar Ionkov p9stat_free(st); 1218bd238fb4SLatchesar Ionkov kfree(st); 12192bad8471SEric Van Hensbergen return retval; 12202bad8471SEric Van Hensbergen } 12212bad8471SEric Van Hensbergen 12222bad8471SEric Van Hensbergen /** 12232bad8471SEric Van Hensbergen * v9fs_vfs_follow_link - follow a symlink path 12242bad8471SEric Van Hensbergen * @dentry: dentry for symlink 12252bad8471SEric Van Hensbergen * @nd: nameidata 12262bad8471SEric Van Hensbergen * 12272bad8471SEric Van Hensbergen */ 12282bad8471SEric Van Hensbergen 12292bad8471SEric Van Hensbergen static void *v9fs_vfs_follow_link(struct dentry *dentry, struct nameidata *nd) 12302bad8471SEric Van Hensbergen { 12312bad8471SEric Van Hensbergen int len = 0; 12322bad8471SEric Van Hensbergen char *link = __getname(); 12332bad8471SEric Van Hensbergen 1234bd238fb4SLatchesar Ionkov P9_DPRINTK(P9_DEBUG_VFS, "%s n", dentry->d_name.name); 12352bad8471SEric Van Hensbergen 12362bad8471SEric Van Hensbergen if (!link) 12372bad8471SEric Van Hensbergen link = ERR_PTR(-ENOMEM); 12382bad8471SEric Van Hensbergen else { 123916cce6d2SLatchesar Ionkov len = v9fs_readlink(dentry, link, PATH_MAX); 12402bad8471SEric Van Hensbergen 12412bad8471SEric Van Hensbergen if (len < 0) { 1242ce44eeb6SDavi Arnaut __putname(link); 12432bad8471SEric Van Hensbergen link = ERR_PTR(len); 12442bad8471SEric Van Hensbergen } else 12452511cd0bSMartin Stava link[min(len, PATH_MAX-1)] = 0; 12462bad8471SEric Van Hensbergen } 12472bad8471SEric Van Hensbergen nd_set_link(nd, link); 12482bad8471SEric Van Hensbergen 12492bad8471SEric Van Hensbergen return NULL; 12502bad8471SEric Van Hensbergen } 12512bad8471SEric Van Hensbergen 12522bad8471SEric Van Hensbergen /** 12532bad8471SEric Van Hensbergen * v9fs_vfs_put_link - release a symlink path 12542bad8471SEric Van Hensbergen * @dentry: dentry for symlink 12552bad8471SEric Van Hensbergen * @nd: nameidata 1256ee443996SEric Van Hensbergen * @p: unused 12572bad8471SEric Van Hensbergen * 12582bad8471SEric Van Hensbergen */ 12592bad8471SEric Van Hensbergen 126053c06f4eSAneesh Kumar K.V void 1261ee443996SEric Van Hensbergen v9fs_vfs_put_link(struct dentry *dentry, struct nameidata *nd, void *p) 12622bad8471SEric Van Hensbergen { 12632bad8471SEric Van Hensbergen char *s = nd_get_link(nd); 12642bad8471SEric Van Hensbergen 12656ff23207SDuane Griffin P9_DPRINTK(P9_DEBUG_VFS, " %s %s\n", dentry->d_name.name, 12666ff23207SDuane Griffin IS_ERR(s) ? "<error>" : s); 12672bad8471SEric Van Hensbergen if (!IS_ERR(s)) 1268ce44eeb6SDavi Arnaut __putname(s); 12692bad8471SEric Van Hensbergen } 12702bad8471SEric Van Hensbergen 1271ee443996SEric Van Hensbergen /** 1272ee443996SEric Van Hensbergen * v9fs_vfs_mkspecial - create a special file 1273ee443996SEric Van Hensbergen * @dir: inode to create special file in 1274ee443996SEric Van Hensbergen * @dentry: dentry to create 1275ee443996SEric Van Hensbergen * @mode: mode to create special file 1276ee443996SEric Van Hensbergen * @extension: 9p2000.u format extension string representing special file 1277ee443996SEric Van Hensbergen * 1278ee443996SEric Van Hensbergen */ 1279ee443996SEric Van Hensbergen 1280531b1094SLatchesar Ionkov static int v9fs_vfs_mkspecial(struct inode *dir, struct dentry *dentry, 1281531b1094SLatchesar Ionkov int mode, const char *extension) 1282531b1094SLatchesar Ionkov { 1283bd238fb4SLatchesar Ionkov u32 perm; 1284bd238fb4SLatchesar Ionkov struct p9_fid *fid; 1285d28c61f0SAneesh Kumar K.V struct v9fs_session_info *v9ses; 1286531b1094SLatchesar Ionkov 12876a3124a3SLatchesar Ionkov v9ses = v9fs_inode2v9ses(dir); 1288dd6102fbSSripathi Kodi if (!v9fs_proto_dotu(v9ses)) { 1289bd238fb4SLatchesar Ionkov P9_DPRINTK(P9_DEBUG_ERROR, "not extended\n"); 12906a3124a3SLatchesar Ionkov return -EPERM; 1291531b1094SLatchesar Ionkov } 1292531b1094SLatchesar Ionkov 1293da977b2cSEric Van Hensbergen perm = unixmode2p9mode(v9ses, mode); 1294bd238fb4SLatchesar Ionkov fid = v9fs_create(v9ses, dir, dentry, (char *) extension, perm, 1295bd238fb4SLatchesar Ionkov P9_OREAD); 1296bd238fb4SLatchesar Ionkov if (IS_ERR(fid)) 1297bd238fb4SLatchesar Ionkov return PTR_ERR(fid); 1298da977b2cSEric Van Hensbergen 1299d28c61f0SAneesh Kumar K.V v9fs_invalidate_inode_attr(dir); 1300bd238fb4SLatchesar Ionkov p9_client_clunk(fid); 13016a3124a3SLatchesar Ionkov return 0; 1302531b1094SLatchesar Ionkov } 1303531b1094SLatchesar Ionkov 1304531b1094SLatchesar Ionkov /** 1305531b1094SLatchesar Ionkov * v9fs_vfs_symlink - helper function to create symlinks 1306531b1094SLatchesar Ionkov * @dir: directory inode containing symlink 1307531b1094SLatchesar Ionkov * @dentry: dentry for symlink 1308531b1094SLatchesar Ionkov * @symname: symlink data 1309531b1094SLatchesar Ionkov * 1310ee443996SEric Van Hensbergen * See Also: 9P2000.u RFC for more information 1311531b1094SLatchesar Ionkov * 1312531b1094SLatchesar Ionkov */ 1313531b1094SLatchesar Ionkov 1314531b1094SLatchesar Ionkov static int 1315531b1094SLatchesar Ionkov v9fs_vfs_symlink(struct inode *dir, struct dentry *dentry, const char *symname) 1316531b1094SLatchesar Ionkov { 1317bd238fb4SLatchesar Ionkov P9_DPRINTK(P9_DEBUG_VFS, " %lu,%s,%s\n", dir->i_ino, 1318bd238fb4SLatchesar Ionkov dentry->d_name.name, symname); 1319531b1094SLatchesar Ionkov 1320531b1094SLatchesar Ionkov return v9fs_vfs_mkspecial(dir, dentry, S_IFLNK, symname); 1321531b1094SLatchesar Ionkov } 1322531b1094SLatchesar Ionkov 13232bad8471SEric Van Hensbergen /** 13242bad8471SEric Van Hensbergen * v9fs_vfs_link - create a hardlink 13252bad8471SEric Van Hensbergen * @old_dentry: dentry for file to link to 13262bad8471SEric Van Hensbergen * @dir: inode destination for new link 132773c592b9SEric Van Hensbergen * @dentry: dentry for link 13282bad8471SEric Van Hensbergen * 13292bad8471SEric Van Hensbergen */ 13302bad8471SEric Van Hensbergen 13312bad8471SEric Van Hensbergen static int 13322bad8471SEric Van Hensbergen v9fs_vfs_link(struct dentry *old_dentry, struct inode *dir, 13332bad8471SEric Van Hensbergen struct dentry *dentry) 13342bad8471SEric Van Hensbergen { 1335531b1094SLatchesar Ionkov int retval; 1336531b1094SLatchesar Ionkov char *name; 1337d28c61f0SAneesh Kumar K.V struct p9_fid *oldfid; 13382bad8471SEric Van Hensbergen 1339bd238fb4SLatchesar Ionkov P9_DPRINTK(P9_DEBUG_VFS, 1340bd238fb4SLatchesar Ionkov " %lu,%s,%s\n", dir->i_ino, dentry->d_name.name, 13412bad8471SEric Van Hensbergen old_dentry->d_name.name); 13422bad8471SEric Van Hensbergen 1343da977b2cSEric Van Hensbergen oldfid = v9fs_fid_clone(old_dentry); 1344da977b2cSEric Van Hensbergen if (IS_ERR(oldfid)) 1345da977b2cSEric Van Hensbergen return PTR_ERR(oldfid); 13462bad8471SEric Van Hensbergen 1347531b1094SLatchesar Ionkov name = __getname(); 1348da977b2cSEric Van Hensbergen if (unlikely(!name)) { 1349da977b2cSEric Van Hensbergen retval = -ENOMEM; 1350da977b2cSEric Van Hensbergen goto clunk_fid; 1351da977b2cSEric Van Hensbergen } 13520710d36aSFlorin Malita 135316cce6d2SLatchesar Ionkov sprintf(name, "%d\n", oldfid->fid); 1354bd238fb4SLatchesar Ionkov retval = v9fs_vfs_mkspecial(dir, dentry, P9_DMLINK, name); 1355531b1094SLatchesar Ionkov __putname(name); 1356c06c066aSAneesh Kumar K.V if (!retval) { 1357c06c066aSAneesh Kumar K.V v9fs_refresh_inode(oldfid, old_dentry->d_inode); 1358d28c61f0SAneesh Kumar K.V v9fs_invalidate_inode_attr(dir); 1359c06c066aSAneesh Kumar K.V } 1360da977b2cSEric Van Hensbergen clunk_fid: 1361bd238fb4SLatchesar Ionkov p9_client_clunk(oldfid); 13622bad8471SEric Van Hensbergen return retval; 13632bad8471SEric Van Hensbergen } 13642bad8471SEric Van Hensbergen 13652bad8471SEric Van Hensbergen /** 13662bad8471SEric Van Hensbergen * v9fs_vfs_mknod - create a special file 13672bad8471SEric Van Hensbergen * @dir: inode destination for new link 13682bad8471SEric Van Hensbergen * @dentry: dentry for file 13692bad8471SEric Van Hensbergen * @mode: mode for creation 1370ee443996SEric Van Hensbergen * @rdev: device associated with special file 13712bad8471SEric Van Hensbergen * 13722bad8471SEric Van Hensbergen */ 13732bad8471SEric Van Hensbergen 13742bad8471SEric Van Hensbergen static int 13752bad8471SEric Van Hensbergen v9fs_vfs_mknod(struct inode *dir, struct dentry *dentry, int mode, dev_t rdev) 13762bad8471SEric Van Hensbergen { 1377531b1094SLatchesar Ionkov int retval; 1378531b1094SLatchesar Ionkov char *name; 13792bad8471SEric Van Hensbergen 1380bd238fb4SLatchesar Ionkov P9_DPRINTK(P9_DEBUG_VFS, 1381bd238fb4SLatchesar Ionkov " %lu,%s mode: %x MAJOR: %u MINOR: %u\n", dir->i_ino, 13822bad8471SEric Van Hensbergen dentry->d_name.name, mode, MAJOR(rdev), MINOR(rdev)); 13832bad8471SEric Van Hensbergen 1384531b1094SLatchesar Ionkov if (!new_valid_dev(rdev)) 1385531b1094SLatchesar Ionkov return -EINVAL; 138673c592b9SEric Van Hensbergen 1387531b1094SLatchesar Ionkov name = __getname(); 1388c0291a05SEugene Teo if (!name) 1389c0291a05SEugene Teo return -ENOMEM; 13902bad8471SEric Van Hensbergen /* build extension */ 13912bad8471SEric Van Hensbergen if (S_ISBLK(mode)) 1392531b1094SLatchesar Ionkov sprintf(name, "b %u %u", MAJOR(rdev), MINOR(rdev)); 13932bad8471SEric Van Hensbergen else if (S_ISCHR(mode)) 1394531b1094SLatchesar Ionkov sprintf(name, "c %u %u", MAJOR(rdev), MINOR(rdev)); 139573c592b9SEric Van Hensbergen else if (S_ISFIFO(mode)) 1396531b1094SLatchesar Ionkov *name = 0; 139775cc5c9bSVenkateswararao Jujjuri else if (S_ISSOCK(mode)) 139875cc5c9bSVenkateswararao Jujjuri *name = 0; 13992bad8471SEric Van Hensbergen else { 1400531b1094SLatchesar Ionkov __putname(name); 1401531b1094SLatchesar Ionkov return -EINVAL; 14022bad8471SEric Van Hensbergen } 14032bad8471SEric Van Hensbergen 1404531b1094SLatchesar Ionkov retval = v9fs_vfs_mkspecial(dir, dentry, mode, name); 1405531b1094SLatchesar Ionkov __putname(name); 14062bad8471SEric Van Hensbergen 14072bad8471SEric Van Hensbergen return retval; 14082bad8471SEric Van Hensbergen } 14092bad8471SEric Van Hensbergen 1410b3cbea03SAneesh Kumar K.V int v9fs_refresh_inode(struct p9_fid *fid, struct inode *inode) 1411b3cbea03SAneesh Kumar K.V { 141245089142SAneesh Kumar K.V int umode; 141345089142SAneesh Kumar K.V dev_t rdev; 1414b3cbea03SAneesh Kumar K.V loff_t i_size; 1415b3cbea03SAneesh Kumar K.V struct p9_wstat *st; 1416b3cbea03SAneesh Kumar K.V struct v9fs_session_info *v9ses; 1417b3cbea03SAneesh Kumar K.V 1418b3cbea03SAneesh Kumar K.V v9ses = v9fs_inode2v9ses(inode); 1419b3cbea03SAneesh Kumar K.V st = p9_client_stat(fid); 1420b3cbea03SAneesh Kumar K.V if (IS_ERR(st)) 1421b3cbea03SAneesh Kumar K.V return PTR_ERR(st); 142245089142SAneesh Kumar K.V /* 142345089142SAneesh Kumar K.V * Don't update inode if the file type is different 142445089142SAneesh Kumar K.V */ 142545089142SAneesh Kumar K.V umode = p9mode2unixmode(v9ses, st, &rdev); 142645089142SAneesh Kumar K.V if ((inode->i_mode & S_IFMT) != (umode & S_IFMT)) 142745089142SAneesh Kumar K.V goto out; 1428b3cbea03SAneesh Kumar K.V 1429b3cbea03SAneesh Kumar K.V spin_lock(&inode->i_lock); 1430b3cbea03SAneesh Kumar K.V /* 1431b3cbea03SAneesh Kumar K.V * We don't want to refresh inode->i_size, 1432b3cbea03SAneesh Kumar K.V * because we may have cached data 1433b3cbea03SAneesh Kumar K.V */ 1434b3cbea03SAneesh Kumar K.V i_size = inode->i_size; 1435b3cbea03SAneesh Kumar K.V v9fs_stat2inode(st, inode, inode->i_sb); 1436b3cbea03SAneesh Kumar K.V if (v9ses->cache) 1437b3cbea03SAneesh Kumar K.V inode->i_size = i_size; 1438b3cbea03SAneesh Kumar K.V spin_unlock(&inode->i_lock); 143945089142SAneesh Kumar K.V out: 1440b3cbea03SAneesh Kumar K.V p9stat_free(st); 1441b3cbea03SAneesh Kumar K.V kfree(st); 1442b3cbea03SAneesh Kumar K.V return 0; 1443b3cbea03SAneesh Kumar K.V } 1444b3cbea03SAneesh Kumar K.V 14459b6533c9SSripathi Kodi static const struct inode_operations v9fs_dir_inode_operations_dotu = { 14469b6533c9SSripathi Kodi .create = v9fs_vfs_create, 14479b6533c9SSripathi Kodi .lookup = v9fs_vfs_lookup, 14489b6533c9SSripathi Kodi .symlink = v9fs_vfs_symlink, 144950cc42ffSVenkateswararao Jujjuri (JV) .link = v9fs_vfs_link, 14509b6533c9SSripathi Kodi .unlink = v9fs_vfs_unlink, 14519b6533c9SSripathi Kodi .mkdir = v9fs_vfs_mkdir, 14529b6533c9SSripathi Kodi .rmdir = v9fs_vfs_rmdir, 14531d76e313SAneesh Kumar K.V .mknod = v9fs_vfs_mknod, 14549b6533c9SSripathi Kodi .rename = v9fs_vfs_rename, 14559b6533c9SSripathi Kodi .getattr = v9fs_vfs_getattr, 14569b6533c9SSripathi Kodi .setattr = v9fs_vfs_setattr, 14579b6533c9SSripathi Kodi }; 14589b6533c9SSripathi Kodi 1459754661f1SArjan van de Ven static const struct inode_operations v9fs_dir_inode_operations = { 1460b501611aSEric Van Hensbergen .create = v9fs_vfs_create, 1461b501611aSEric Van Hensbergen .lookup = v9fs_vfs_lookup, 1462b501611aSEric Van Hensbergen .unlink = v9fs_vfs_unlink, 1463b501611aSEric Van Hensbergen .mkdir = v9fs_vfs_mkdir, 1464b501611aSEric Van Hensbergen .rmdir = v9fs_vfs_rmdir, 1465b501611aSEric Van Hensbergen .mknod = v9fs_vfs_mknod, 1466b501611aSEric Van Hensbergen .rename = v9fs_vfs_rename, 1467b501611aSEric Van Hensbergen .getattr = v9fs_vfs_getattr, 1468b501611aSEric Van Hensbergen .setattr = v9fs_vfs_setattr, 1469b501611aSEric Van Hensbergen }; 1470b501611aSEric Van Hensbergen 1471754661f1SArjan van de Ven static const struct inode_operations v9fs_file_inode_operations = { 14722bad8471SEric Van Hensbergen .getattr = v9fs_vfs_getattr, 14732bad8471SEric Van Hensbergen .setattr = v9fs_vfs_setattr, 14742bad8471SEric Van Hensbergen }; 14752bad8471SEric Van Hensbergen 1476754661f1SArjan van de Ven static const struct inode_operations v9fs_symlink_inode_operations = { 1477204f2f0eSAl Viro .readlink = generic_readlink, 14782bad8471SEric Van Hensbergen .follow_link = v9fs_vfs_follow_link, 14792bad8471SEric Van Hensbergen .put_link = v9fs_vfs_put_link, 14802bad8471SEric Van Hensbergen .getattr = v9fs_vfs_getattr, 14812bad8471SEric Van Hensbergen .setattr = v9fs_vfs_setattr, 14822bad8471SEric Van Hensbergen }; 14839b6533c9SSripathi Kodi 1484