11f327613SThomas Gleixner // SPDX-License-Identifier: GPL-2.0-only 22bad8471SEric Van Hensbergen /* 373c592b9SEric Van Hensbergen * This file contains vfs inode ops for the 9P2000 protocol. 42bad8471SEric Van Hensbergen * 52bad8471SEric Van Hensbergen * Copyright (C) 2004 by Eric Van Hensbergen <ericvh@gmail.com> 62bad8471SEric Van Hensbergen * Copyright (C) 2002 by Ron Minnich <rminnich@lanl.gov> 72bad8471SEric Van Hensbergen */ 82bad8471SEric Van Hensbergen 95d385153SJoe Perches #define pr_fmt(fmt) KBUILD_MODNAME ": " fmt 105d385153SJoe Perches 112bad8471SEric Van Hensbergen #include <linux/module.h> 122bad8471SEric Van Hensbergen #include <linux/errno.h> 132bad8471SEric Van Hensbergen #include <linux/fs.h> 142bad8471SEric Van Hensbergen #include <linux/file.h> 152bad8471SEric Van Hensbergen #include <linux/pagemap.h> 162bad8471SEric Van Hensbergen #include <linux/stat.h> 172bad8471SEric Van Hensbergen #include <linux/string.h> 182bad8471SEric Van Hensbergen #include <linux/inet.h> 192bad8471SEric Van Hensbergen #include <linux/namei.h> 202bad8471SEric Van Hensbergen #include <linux/idr.h> 21e8edc6e0SAlexey Dobriyan #include <linux/sched.h> 225a0e3ad6STejun Heo #include <linux/slab.h> 23ebf46264SAneesh Kumar K.V #include <linux/xattr.h> 2485ff872dSAneesh Kumar K.V #include <linux/posix_acl.h> 25bd238fb4SLatchesar Ionkov #include <net/9p/9p.h> 26bd238fb4SLatchesar Ionkov #include <net/9p/client.h> 272bad8471SEric Van Hensbergen 282bad8471SEric Van Hensbergen #include "v9fs.h" 292bad8471SEric Van Hensbergen #include "v9fs_vfs.h" 302bad8471SEric Van Hensbergen #include "fid.h" 3160e78d2cSAbhishek Kulkarni #include "cache.h" 32ebf46264SAneesh Kumar K.V #include "xattr.h" 3385ff872dSAneesh Kumar K.V #include "acl.h" 342bad8471SEric Van Hensbergen 35754661f1SArjan van de Ven static const struct inode_operations v9fs_dir_inode_operations; 369b6533c9SSripathi Kodi static const struct inode_operations v9fs_dir_inode_operations_dotu; 37754661f1SArjan van de Ven static const struct inode_operations v9fs_file_inode_operations; 38754661f1SArjan van de Ven static const struct inode_operations v9fs_symlink_inode_operations; 39f5fc6145SAneesh Kumar K.V 402bad8471SEric Van Hensbergen /** 412bad8471SEric Van Hensbergen * unixmode2p9mode - convert unix mode bits to plan 9 422bad8471SEric Van Hensbergen * @v9ses: v9fs session information 432bad8471SEric Van Hensbergen * @mode: mode to convert 442bad8471SEric Van Hensbergen * 452bad8471SEric Van Hensbergen */ 462bad8471SEric Van Hensbergen 473eda0de6SAl Viro static u32 unixmode2p9mode(struct v9fs_session_info *v9ses, umode_t mode) 482bad8471SEric Van Hensbergen { 492bad8471SEric Van Hensbergen int res; 502bad8471SEric Van Hensbergen res = mode & 0777; 512bad8471SEric Van Hensbergen if (S_ISDIR(mode)) 52bd238fb4SLatchesar Ionkov res |= P9_DMDIR; 53dd6102fbSSripathi Kodi if (v9fs_proto_dotu(v9ses)) { 542bad8471SEric Van Hensbergen if (v9ses->nodev == 0) { 552bad8471SEric Van Hensbergen if (S_ISSOCK(mode)) 56bd238fb4SLatchesar Ionkov res |= P9_DMSOCKET; 572bad8471SEric Van Hensbergen if (S_ISFIFO(mode)) 58bd238fb4SLatchesar Ionkov res |= P9_DMNAMEDPIPE; 592bad8471SEric Van Hensbergen if (S_ISBLK(mode)) 60bd238fb4SLatchesar Ionkov res |= P9_DMDEVICE; 612bad8471SEric Van Hensbergen if (S_ISCHR(mode)) 62bd238fb4SLatchesar Ionkov res |= P9_DMDEVICE; 632bad8471SEric Van Hensbergen } 642bad8471SEric Van Hensbergen 652bad8471SEric Van Hensbergen if ((mode & S_ISUID) == S_ISUID) 66bd238fb4SLatchesar Ionkov res |= P9_DMSETUID; 672bad8471SEric Van Hensbergen if ((mode & S_ISGID) == S_ISGID) 68bd238fb4SLatchesar Ionkov res |= P9_DMSETGID; 69d199d652SAnthony Liguori if ((mode & S_ISVTX) == S_ISVTX) 70d199d652SAnthony Liguori res |= P9_DMSETVTX; 712bad8471SEric Van Hensbergen } 722bad8471SEric Van Hensbergen return res; 732bad8471SEric Van Hensbergen } 742bad8471SEric Van Hensbergen 752bad8471SEric Van Hensbergen /** 76df345c67SAneesh Kumar K.V * p9mode2perm- convert plan9 mode bits to unix permission bits 77df345c67SAneesh Kumar K.V * @v9ses: v9fs session information 78df345c67SAneesh Kumar K.V * @stat: p9_wstat from which mode need to be derived 79df345c67SAneesh Kumar K.V * 80df345c67SAneesh Kumar K.V */ 81df345c67SAneesh Kumar K.V static int p9mode2perm(struct v9fs_session_info *v9ses, 82df345c67SAneesh Kumar K.V struct p9_wstat *stat) 83df345c67SAneesh Kumar K.V { 84df345c67SAneesh Kumar K.V int res; 85df345c67SAneesh Kumar K.V int mode = stat->mode; 86df345c67SAneesh Kumar K.V 87df345c67SAneesh Kumar K.V res = mode & S_IALLUGO; 88df345c67SAneesh Kumar K.V if (v9fs_proto_dotu(v9ses)) { 89df345c67SAneesh Kumar K.V if ((mode & P9_DMSETUID) == P9_DMSETUID) 90df345c67SAneesh Kumar K.V res |= S_ISUID; 91df345c67SAneesh Kumar K.V 92df345c67SAneesh Kumar K.V if ((mode & P9_DMSETGID) == P9_DMSETGID) 93df345c67SAneesh Kumar K.V res |= S_ISGID; 94df345c67SAneesh Kumar K.V 95df345c67SAneesh Kumar K.V if ((mode & P9_DMSETVTX) == P9_DMSETVTX) 96df345c67SAneesh Kumar K.V res |= S_ISVTX; 97df345c67SAneesh Kumar K.V } 98df345c67SAneesh Kumar K.V return res; 99df345c67SAneesh Kumar K.V } 100df345c67SAneesh Kumar K.V 101df345c67SAneesh Kumar K.V /** 1022bad8471SEric Van Hensbergen * p9mode2unixmode- convert plan9 mode bits to unix mode bits 1032bad8471SEric Van Hensbergen * @v9ses: v9fs session information 10445089142SAneesh Kumar K.V * @stat: p9_wstat from which mode need to be derived 10545089142SAneesh Kumar K.V * @rdev: major number, minor number in case of device files. 1062bad8471SEric Van Hensbergen * 1072bad8471SEric Van Hensbergen */ 1083eda0de6SAl Viro static umode_t p9mode2unixmode(struct v9fs_session_info *v9ses, 10945089142SAneesh Kumar K.V struct p9_wstat *stat, dev_t *rdev) 1102bad8471SEric Van Hensbergen { 111*05f975cdSDominique Martinet int res, r; 1123eda0de6SAl Viro u32 mode = stat->mode; 1132bad8471SEric Van Hensbergen 11445089142SAneesh Kumar K.V *rdev = 0; 115df345c67SAneesh Kumar K.V res = p9mode2perm(v9ses, stat); 1162bad8471SEric Van Hensbergen 117bd238fb4SLatchesar Ionkov if ((mode & P9_DMDIR) == P9_DMDIR) 1182bad8471SEric Van Hensbergen res |= S_IFDIR; 119dd6102fbSSripathi Kodi else if ((mode & P9_DMSYMLINK) && (v9fs_proto_dotu(v9ses))) 1202bad8471SEric Van Hensbergen res |= S_IFLNK; 121dd6102fbSSripathi Kodi else if ((mode & P9_DMSOCKET) && (v9fs_proto_dotu(v9ses)) 1222bad8471SEric Van Hensbergen && (v9ses->nodev == 0)) 1232bad8471SEric Van Hensbergen res |= S_IFSOCK; 124dd6102fbSSripathi Kodi else if ((mode & P9_DMNAMEDPIPE) && (v9fs_proto_dotu(v9ses)) 1252bad8471SEric Van Hensbergen && (v9ses->nodev == 0)) 1262bad8471SEric Van Hensbergen res |= S_IFIFO; 127dd6102fbSSripathi Kodi else if ((mode & P9_DMDEVICE) && (v9fs_proto_dotu(v9ses)) 12845089142SAneesh Kumar K.V && (v9ses->nodev == 0)) { 129*05f975cdSDominique Martinet char type = 0; 13045089142SAneesh Kumar K.V int major = -1, minor = -1; 13145089142SAneesh Kumar K.V 132*05f975cdSDominique Martinet r = sscanf(stat->extension, "%c %i %i", &type, &major, &minor); 133*05f975cdSDominique Martinet if (r != 3) { 134*05f975cdSDominique Martinet p9_debug(P9_DEBUG_ERROR, 135*05f975cdSDominique Martinet "invalid device string, umode will be bogus: %s\n", 136*05f975cdSDominique Martinet stat->extension); 137*05f975cdSDominique Martinet return res; 138*05f975cdSDominique Martinet } 13945089142SAneesh Kumar K.V switch (type) { 14045089142SAneesh Kumar K.V case 'c': 14145089142SAneesh Kumar K.V res |= S_IFCHR; 14245089142SAneesh Kumar K.V break; 14345089142SAneesh Kumar K.V case 'b': 1442bad8471SEric Van Hensbergen res |= S_IFBLK; 14545089142SAneesh Kumar K.V break; 14645089142SAneesh Kumar K.V default: 1475d385153SJoe Perches p9_debug(P9_DEBUG_ERROR, "Unknown special type %c %s\n", 1485d385153SJoe Perches type, stat->extension); 14951958817Szhengbin } 15045089142SAneesh Kumar K.V *rdev = MKDEV(major, minor); 15145089142SAneesh Kumar K.V } else 1522bad8471SEric Van Hensbergen res |= S_IFREG; 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 1832e4bef41SEric Van Hensbergen if (extended) { 1842e4bef41SEric Van Hensbergen if (uflags & O_EXCL) 1852e4bef41SEric Van Hensbergen ret |= P9_OEXCL; 1862e4bef41SEric Van Hensbergen 1876a3124a3SLatchesar Ionkov if (uflags & O_APPEND) 188bd238fb4SLatchesar Ionkov ret |= P9_OAPPEND; 1892e4bef41SEric Van Hensbergen } 1906a3124a3SLatchesar Ionkov 1916a3124a3SLatchesar Ionkov return ret; 1926a3124a3SLatchesar Ionkov } 1936a3124a3SLatchesar Ionkov 1942bad8471SEric Van Hensbergen /** 195531b1094SLatchesar Ionkov * v9fs_blank_wstat - helper function to setup a 9P stat structure 196531b1094SLatchesar Ionkov * @wstat: structure to initialize 1972bad8471SEric Van Hensbergen * 1982bad8471SEric Van Hensbergen */ 1992bad8471SEric Van Hensbergen 2007a4439c4SM. Mohan Kumar void 201bd238fb4SLatchesar Ionkov v9fs_blank_wstat(struct p9_wstat *wstat) 2022bad8471SEric Van Hensbergen { 203531b1094SLatchesar Ionkov wstat->type = ~0; 204531b1094SLatchesar Ionkov wstat->dev = ~0; 205531b1094SLatchesar Ionkov wstat->qid.type = ~0; 206531b1094SLatchesar Ionkov wstat->qid.version = ~0; 207531b1094SLatchesar Ionkov *((long long *)&wstat->qid.path) = ~0; 208531b1094SLatchesar Ionkov wstat->mode = ~0; 209531b1094SLatchesar Ionkov wstat->atime = ~0; 210531b1094SLatchesar Ionkov wstat->mtime = ~0; 211531b1094SLatchesar Ionkov wstat->length = ~0; 212531b1094SLatchesar Ionkov wstat->name = NULL; 213531b1094SLatchesar Ionkov wstat->uid = NULL; 214531b1094SLatchesar Ionkov wstat->gid = NULL; 215531b1094SLatchesar Ionkov wstat->muid = NULL; 216447c5094SEric W. Biederman wstat->n_uid = INVALID_UID; 217447c5094SEric W. Biederman wstat->n_gid = INVALID_GID; 218447c5094SEric W. Biederman wstat->n_muid = INVALID_UID; 219531b1094SLatchesar Ionkov wstat->extension = NULL; 2202bad8471SEric Van Hensbergen } 2212bad8471SEric Van Hensbergen 22260e78d2cSAbhishek Kulkarni /** 22360e78d2cSAbhishek Kulkarni * v9fs_alloc_inode - helper function to allocate an inode 224bc868036SDavid Howells * @sb: The superblock to allocate the inode from 22560e78d2cSAbhishek Kulkarni */ 22660e78d2cSAbhishek Kulkarni struct inode *v9fs_alloc_inode(struct super_block *sb) 22760e78d2cSAbhishek Kulkarni { 228a78ce05dSAneesh Kumar K.V struct v9fs_inode *v9inode; 2292ed0b757SLi Heng v9inode = kmem_cache_alloc(v9fs_inode_cache, GFP_KERNEL); 230a78ce05dSAneesh Kumar K.V if (!v9inode) 23160e78d2cSAbhishek Kulkarni return NULL; 232a78ce05dSAneesh Kumar K.V #ifdef CONFIG_9P_FSCACHE 233a78ce05dSAneesh Kumar K.V v9inode->fscache = NULL; 2348f5fed1eSSasha Levin mutex_init(&v9inode->fscache_lock); 235a78ce05dSAneesh Kumar K.V #endif 2366b39f6d2SAneesh Kumar K.V v9inode->writeback_fid = NULL; 237b3cbea03SAneesh Kumar K.V v9inode->cache_validity = 0; 2385a7e0a8cSAneesh Kumar K.V mutex_init(&v9inode->v_mutex); 239a78ce05dSAneesh Kumar K.V return &v9inode->vfs_inode; 24060e78d2cSAbhishek Kulkarni } 24160e78d2cSAbhishek Kulkarni 24260e78d2cSAbhishek Kulkarni /** 2435e8a0770SAl Viro * v9fs_free_inode - destroy an inode 244bc868036SDavid Howells * @inode: The inode to be freed 24560e78d2cSAbhishek Kulkarni */ 24660e78d2cSAbhishek Kulkarni 2475e8a0770SAl Viro void v9fs_free_inode(struct inode *inode) 248fa0d7e3dSNick Piggin { 249a78ce05dSAneesh Kumar K.V kmem_cache_free(v9fs_inode_cache, V9FS_I(inode)); 250fa0d7e3dSNick Piggin } 251fa0d7e3dSNick Piggin 2525ffc0cb3SAneesh Kumar K.V int v9fs_init_inode(struct v9fs_session_info *v9ses, 2533eda0de6SAl Viro struct inode *inode, umode_t mode, dev_t rdev) 2542bad8471SEric Van Hensbergen { 2555ffc0cb3SAneesh Kumar K.V int err = 0; 2562bb54115SAbhishek Kulkarni 25721cb47beSChristian Brauner inode_init_owner(&init_user_ns,inode, NULL, mode); 2582bad8471SEric Van Hensbergen inode->i_blocks = 0; 25945089142SAneesh Kumar K.V inode->i_rdev = rdev; 260078cd827SDeepa Dinamani inode->i_atime = inode->i_mtime = inode->i_ctime = current_time(inode); 261147b31cfSEric Van Hensbergen inode->i_mapping->a_ops = &v9fs_addr_operations; 262987a6485SGreg Kurz inode->i_private = NULL; 2632bad8471SEric Van Hensbergen 2642bad8471SEric Van Hensbergen switch (mode & S_IFMT) { 2652bad8471SEric Van Hensbergen case S_IFIFO: 2662bad8471SEric Van Hensbergen case S_IFBLK: 2672bad8471SEric Van Hensbergen case S_IFCHR: 2682bad8471SEric Van Hensbergen case S_IFSOCK: 2694b43516aSM. Mohan Kumar if (v9fs_proto_dotl(v9ses)) { 2704b43516aSM. Mohan Kumar inode->i_op = &v9fs_file_inode_operations_dotl; 2714b43516aSM. Mohan Kumar } else if (v9fs_proto_dotu(v9ses)) { 2724b43516aSM. Mohan Kumar inode->i_op = &v9fs_file_inode_operations; 2734b43516aSM. Mohan Kumar } else { 2745d385153SJoe Perches p9_debug(P9_DEBUG_ERROR, 275bd238fb4SLatchesar Ionkov "special files without extended mode\n"); 2762bb54115SAbhishek Kulkarni err = -EINVAL; 2772bb54115SAbhishek Kulkarni goto error; 278b501611aSEric Van Hensbergen } 2792bb54115SAbhishek Kulkarni init_special_inode(inode, inode->i_mode, inode->i_rdev); 2805d58bec5SEric Van Hensbergen break; 2812bad8471SEric Van Hensbergen case S_IFREG: 2829b6533c9SSripathi Kodi if (v9fs_proto_dotl(v9ses)) { 2839b6533c9SSripathi Kodi inode->i_op = &v9fs_file_inode_operations_dotl; 284fb89b45cSDominique Martinet if (v9ses->cache == CACHE_LOOSE || 285fb89b45cSDominique Martinet v9ses->cache == CACHE_FSCACHE) 28629236f4eSAneesh Kumar K.V inode->i_fop = 28729236f4eSAneesh Kumar K.V &v9fs_cached_file_operations_dotl; 288fb89b45cSDominique Martinet else if (v9ses->cache == CACHE_MMAP) 289fb89b45cSDominique Martinet inode->i_fop = &v9fs_mmap_file_operations_dotl; 29029236f4eSAneesh Kumar K.V else 2919b6533c9SSripathi Kodi inode->i_fop = &v9fs_file_operations_dotl; 2929b6533c9SSripathi Kodi } else { 2932bad8471SEric Van Hensbergen inode->i_op = &v9fs_file_inode_operations; 294fb89b45cSDominique Martinet if (v9ses->cache == CACHE_LOOSE || 295fb89b45cSDominique Martinet v9ses->cache == CACHE_FSCACHE) 296fb89b45cSDominique Martinet inode->i_fop = 297fb89b45cSDominique Martinet &v9fs_cached_file_operations; 298fb89b45cSDominique Martinet else if (v9ses->cache == CACHE_MMAP) 299fb89b45cSDominique Martinet inode->i_fop = &v9fs_mmap_file_operations; 30029236f4eSAneesh Kumar K.V else 3012bad8471SEric Van Hensbergen inode->i_fop = &v9fs_file_operations; 3029b6533c9SSripathi Kodi } 3039b6533c9SSripathi Kodi 3042bad8471SEric Van Hensbergen break; 305b501611aSEric Van Hensbergen case S_IFLNK: 3069b6533c9SSripathi Kodi if (!v9fs_proto_dotu(v9ses) && !v9fs_proto_dotl(v9ses)) { 3075d385153SJoe Perches p9_debug(P9_DEBUG_ERROR, 3085d385153SJoe Perches "extended modes used with legacy protocol\n"); 3092bb54115SAbhishek Kulkarni err = -EINVAL; 3102bb54115SAbhishek Kulkarni goto error; 311b501611aSEric Van Hensbergen } 3129b6533c9SSripathi Kodi 3139b6533c9SSripathi Kodi if (v9fs_proto_dotl(v9ses)) 3149b6533c9SSripathi Kodi inode->i_op = &v9fs_symlink_inode_operations_dotl; 3159b6533c9SSripathi Kodi else 316b501611aSEric Van Hensbergen inode->i_op = &v9fs_symlink_inode_operations; 3179b6533c9SSripathi Kodi 318b501611aSEric Van Hensbergen break; 3192bad8471SEric Van Hensbergen case S_IFDIR: 320d8c76e6fSDave Hansen inc_nlink(inode); 3219b6533c9SSripathi Kodi if (v9fs_proto_dotl(v9ses)) 3229b6533c9SSripathi Kodi inode->i_op = &v9fs_dir_inode_operations_dotl; 3239b6533c9SSripathi Kodi else if (v9fs_proto_dotu(v9ses)) 3249b6533c9SSripathi Kodi inode->i_op = &v9fs_dir_inode_operations_dotu; 325b501611aSEric Van Hensbergen else 3262bad8471SEric Van Hensbergen inode->i_op = &v9fs_dir_inode_operations; 3279b6533c9SSripathi Kodi 3289b6533c9SSripathi Kodi if (v9fs_proto_dotl(v9ses)) 3299b6533c9SSripathi Kodi inode->i_fop = &v9fs_dir_operations_dotl; 3309b6533c9SSripathi Kodi else 3312bad8471SEric Van Hensbergen inode->i_fop = &v9fs_dir_operations; 3329b6533c9SSripathi Kodi 3332bad8471SEric Van Hensbergen break; 3342bad8471SEric Van Hensbergen default: 335609eac1cSLinus Torvalds p9_debug(P9_DEBUG_ERROR, "BAD mode 0x%hx S_IFMT 0x%x\n", 3362bad8471SEric Van Hensbergen mode, mode & S_IFMT); 3372bb54115SAbhishek Kulkarni err = -EINVAL; 3382bb54115SAbhishek Kulkarni goto error; 3392bad8471SEric Van Hensbergen } 3402bb54115SAbhishek Kulkarni error: 3415ffc0cb3SAneesh Kumar K.V return err; 3425ffc0cb3SAneesh Kumar K.V 3435ffc0cb3SAneesh Kumar K.V } 3445ffc0cb3SAneesh Kumar K.V 3455ffc0cb3SAneesh Kumar K.V /** 3465ffc0cb3SAneesh Kumar K.V * v9fs_get_inode - helper function to setup an inode 3475ffc0cb3SAneesh Kumar K.V * @sb: superblock 3485ffc0cb3SAneesh Kumar K.V * @mode: mode to setup inode with 349bc868036SDavid Howells * @rdev: The device numbers to set 3505ffc0cb3SAneesh Kumar K.V */ 3515ffc0cb3SAneesh Kumar K.V 3523eda0de6SAl Viro struct inode *v9fs_get_inode(struct super_block *sb, umode_t mode, dev_t rdev) 3535ffc0cb3SAneesh Kumar K.V { 3545ffc0cb3SAneesh Kumar K.V int err; 3555ffc0cb3SAneesh Kumar K.V struct inode *inode; 3565ffc0cb3SAneesh Kumar K.V struct v9fs_session_info *v9ses = sb->s_fs_info; 3575ffc0cb3SAneesh Kumar K.V 358609eac1cSLinus Torvalds p9_debug(P9_DEBUG_VFS, "super block: %p mode: %ho\n", sb, mode); 3595ffc0cb3SAneesh Kumar K.V 3605ffc0cb3SAneesh Kumar K.V inode = new_inode(sb); 3615ffc0cb3SAneesh Kumar K.V if (!inode) { 3625d385153SJoe Perches pr_warn("%s (%d): Problem allocating inode\n", 3635d385153SJoe Perches __func__, task_pid_nr(current)); 3645ffc0cb3SAneesh Kumar K.V return ERR_PTR(-ENOMEM); 3655ffc0cb3SAneesh Kumar K.V } 36645089142SAneesh Kumar K.V err = v9fs_init_inode(v9ses, inode, mode, rdev); 3675ffc0cb3SAneesh Kumar K.V if (err) { 3682bb54115SAbhishek Kulkarni iput(inode); 3692bb54115SAbhishek Kulkarni return ERR_PTR(err); 3702bad8471SEric Van Hensbergen } 3715ffc0cb3SAneesh Kumar K.V return inode; 3725ffc0cb3SAneesh Kumar K.V } 3732bad8471SEric Van Hensbergen 37460e78d2cSAbhishek Kulkarni /** 375bc868036SDavid Howells * v9fs_evict_inode - Remove an inode from the inode cache 37660e78d2cSAbhishek Kulkarni * @inode: inode to release 37760e78d2cSAbhishek Kulkarni * 37860e78d2cSAbhishek Kulkarni */ 379b57922d9SAl Viro void v9fs_evict_inode(struct inode *inode) 38060e78d2cSAbhishek Kulkarni { 3816b39f6d2SAneesh Kumar K.V struct v9fs_inode *v9inode = V9FS_I(inode); 3826b39f6d2SAneesh Kumar K.V 3834ad78628SAl Viro truncate_inode_pages_final(&inode->i_data); 384dbd5768fSJan Kara clear_inode(inode); 3854ad78628SAl Viro filemap_fdatawrite(&inode->i_data); 38660e78d2cSAbhishek Kulkarni 38760e78d2cSAbhishek Kulkarni v9fs_cache_inode_put_cookie(inode); 3886b39f6d2SAneesh Kumar K.V /* clunk the fid stashed in writeback_fid */ 3896b39f6d2SAneesh Kumar K.V if (v9inode->writeback_fid) { 3906b39f6d2SAneesh Kumar K.V p9_client_clunk(v9inode->writeback_fid); 3916b39f6d2SAneesh Kumar K.V v9inode->writeback_fid = NULL; 3923cf387d7SAneesh Kumar K.V } 39360e78d2cSAbhishek Kulkarni } 39460e78d2cSAbhishek Kulkarni 395fd2421f5SAneesh Kumar K.V static int v9fs_test_inode(struct inode *inode, void *data) 396fd2421f5SAneesh Kumar K.V { 397fd2421f5SAneesh Kumar K.V int umode; 39845089142SAneesh Kumar K.V dev_t rdev; 399fd2421f5SAneesh Kumar K.V struct v9fs_inode *v9inode = V9FS_I(inode); 400fd2421f5SAneesh Kumar K.V struct p9_wstat *st = (struct p9_wstat *)data; 401fd2421f5SAneesh Kumar K.V struct v9fs_session_info *v9ses = v9fs_inode2v9ses(inode); 402fd2421f5SAneesh Kumar K.V 40345089142SAneesh Kumar K.V umode = p9mode2unixmode(v9ses, st, &rdev); 404fd2421f5SAneesh Kumar K.V /* don't match inode of different type */ 4056e3e2c43SAl Viro if (inode_wrong_type(inode, umode)) 406fd2421f5SAneesh Kumar K.V return 0; 407fd2421f5SAneesh Kumar K.V 408fd2421f5SAneesh Kumar K.V /* compare qid details */ 409fd2421f5SAneesh Kumar K.V if (memcmp(&v9inode->qid.version, 410fd2421f5SAneesh Kumar K.V &st->qid.version, sizeof(v9inode->qid.version))) 411fd2421f5SAneesh Kumar K.V return 0; 412fd2421f5SAneesh Kumar K.V 413fd2421f5SAneesh Kumar K.V if (v9inode->qid.type != st->qid.type) 414fd2421f5SAneesh Kumar K.V return 0; 4158ee03163STuomas Tynkkynen 4168ee03163STuomas Tynkkynen if (v9inode->qid.path != st->qid.path) 4178ee03163STuomas Tynkkynen return 0; 418fd2421f5SAneesh Kumar K.V return 1; 419fd2421f5SAneesh Kumar K.V } 420fd2421f5SAneesh Kumar K.V 421ed80fcfaSAneesh Kumar K.V static int v9fs_test_new_inode(struct inode *inode, void *data) 422ed80fcfaSAneesh Kumar K.V { 423ed80fcfaSAneesh Kumar K.V return 0; 424ed80fcfaSAneesh Kumar K.V } 425ed80fcfaSAneesh Kumar K.V 426fd2421f5SAneesh Kumar K.V static int v9fs_set_inode(struct inode *inode, void *data) 427fd2421f5SAneesh Kumar K.V { 428fd2421f5SAneesh Kumar K.V struct v9fs_inode *v9inode = V9FS_I(inode); 429fd2421f5SAneesh Kumar K.V struct p9_wstat *st = (struct p9_wstat *)data; 430fd2421f5SAneesh Kumar K.V 431fd2421f5SAneesh Kumar K.V memcpy(&v9inode->qid, &st->qid, sizeof(st->qid)); 432fd2421f5SAneesh Kumar K.V return 0; 433fd2421f5SAneesh Kumar K.V } 434fd2421f5SAneesh Kumar K.V 4355ffc0cb3SAneesh Kumar K.V static struct inode *v9fs_qid_iget(struct super_block *sb, 4365ffc0cb3SAneesh Kumar K.V struct p9_qid *qid, 437ed80fcfaSAneesh Kumar K.V struct p9_wstat *st, 438ed80fcfaSAneesh Kumar K.V int new) 4395ffc0cb3SAneesh Kumar K.V { 44045089142SAneesh Kumar K.V dev_t rdev; 4413eda0de6SAl Viro int retval; 4423eda0de6SAl Viro umode_t umode; 4435ffc0cb3SAneesh Kumar K.V unsigned long i_ino; 4445ffc0cb3SAneesh Kumar K.V struct inode *inode; 4455ffc0cb3SAneesh Kumar K.V struct v9fs_session_info *v9ses = sb->s_fs_info; 446ed80fcfaSAneesh Kumar K.V int (*test)(struct inode *, void *); 447ed80fcfaSAneesh Kumar K.V 448ed80fcfaSAneesh Kumar K.V if (new) 449ed80fcfaSAneesh Kumar K.V test = v9fs_test_new_inode; 450ed80fcfaSAneesh Kumar K.V else 451ed80fcfaSAneesh Kumar K.V test = v9fs_test_inode; 4525ffc0cb3SAneesh Kumar K.V 4535ffc0cb3SAneesh Kumar K.V i_ino = v9fs_qid2ino(qid); 454ed80fcfaSAneesh Kumar K.V inode = iget5_locked(sb, i_ino, test, v9fs_set_inode, st); 4555ffc0cb3SAneesh Kumar K.V if (!inode) 4565ffc0cb3SAneesh Kumar K.V return ERR_PTR(-ENOMEM); 4575ffc0cb3SAneesh Kumar K.V if (!(inode->i_state & I_NEW)) 4585ffc0cb3SAneesh Kumar K.V return inode; 4595ffc0cb3SAneesh Kumar K.V /* 4605ffc0cb3SAneesh Kumar K.V * initialize the inode with the stat info 4615ffc0cb3SAneesh Kumar K.V * FIXME!! we may need support for stale inodes 4625ffc0cb3SAneesh Kumar K.V * later. 4635ffc0cb3SAneesh Kumar K.V */ 464fd2421f5SAneesh Kumar K.V inode->i_ino = i_ino; 46545089142SAneesh Kumar K.V umode = p9mode2unixmode(v9ses, st, &rdev); 46645089142SAneesh Kumar K.V retval = v9fs_init_inode(v9ses, inode, umode, rdev); 4675ffc0cb3SAneesh Kumar K.V if (retval) 4685ffc0cb3SAneesh Kumar K.V goto error; 4695ffc0cb3SAneesh Kumar K.V 4705e3cc1eeSHou Tao v9fs_stat2inode(st, inode, sb, 0); 4715ffc0cb3SAneesh Kumar K.V v9fs_cache_inode_get_cookie(inode); 4725ffc0cb3SAneesh Kumar K.V unlock_new_inode(inode); 4735ffc0cb3SAneesh Kumar K.V return inode; 4745ffc0cb3SAneesh Kumar K.V error: 4750a73d0a2SAl Viro iget_failed(inode); 4765ffc0cb3SAneesh Kumar K.V return ERR_PTR(retval); 4775ffc0cb3SAneesh Kumar K.V 4785ffc0cb3SAneesh Kumar K.V } 4795ffc0cb3SAneesh Kumar K.V 48053c06f4eSAneesh Kumar K.V struct inode * 481a78ce05dSAneesh Kumar K.V v9fs_inode_from_fid(struct v9fs_session_info *v9ses, struct p9_fid *fid, 482ed80fcfaSAneesh Kumar K.V struct super_block *sb, int new) 4836a3124a3SLatchesar Ionkov { 48451a87c55SEric Van Hensbergen struct p9_wstat *st; 4855ffc0cb3SAneesh Kumar K.V struct inode *inode = NULL; 4866a3124a3SLatchesar Ionkov 487bd238fb4SLatchesar Ionkov st = p9_client_stat(fid); 48802bc3567SAbhishek Kulkarni if (IS_ERR(st)) 48902bc3567SAbhishek Kulkarni return ERR_CAST(st); 4902bad8471SEric Van Hensbergen 491ed80fcfaSAneesh Kumar K.V inode = v9fs_qid_iget(sb, &st->qid, st, new); 49202bc3567SAbhishek Kulkarni p9stat_free(st); 493bd238fb4SLatchesar Ionkov kfree(st); 4945ffc0cb3SAneesh Kumar K.V return inode; 4952bad8471SEric Van Hensbergen } 4962bad8471SEric Van Hensbergen 4972bad8471SEric Van Hensbergen /** 498f88657ceSAneesh Kumar K.V * v9fs_at_to_dotl_flags- convert Linux specific AT flags to 499f88657ceSAneesh Kumar K.V * plan 9 AT flag. 500f88657ceSAneesh Kumar K.V * @flags: flags to convert 501f88657ceSAneesh Kumar K.V */ 502f88657ceSAneesh Kumar K.V static int v9fs_at_to_dotl_flags(int flags) 503f88657ceSAneesh Kumar K.V { 504f88657ceSAneesh Kumar K.V int rflags = 0; 505f88657ceSAneesh Kumar K.V if (flags & AT_REMOVEDIR) 506f88657ceSAneesh Kumar K.V rflags |= P9_DOTL_AT_REMOVEDIR; 507f88657ceSAneesh Kumar K.V return rflags; 508f88657ceSAneesh Kumar K.V } 509f88657ceSAneesh Kumar K.V 510f88657ceSAneesh Kumar K.V /** 511ac89b2efSEryu Guan * v9fs_dec_count - helper functon to drop i_nlink. 512ac89b2efSEryu Guan * 513ac89b2efSEryu Guan * If a directory had nlink <= 2 (including . and ..), then we should not drop 514ac89b2efSEryu Guan * the link count, which indicates the underlying exported fs doesn't maintain 515ac89b2efSEryu Guan * nlink accurately. e.g. 516ac89b2efSEryu Guan * - overlayfs sets nlink to 1 for merged dir 517ac89b2efSEryu Guan * - ext4 (with dir_nlink feature enabled) sets nlink to 1 if a dir has more 518ac89b2efSEryu Guan * than EXT4_LINK_MAX (65000) links. 519ac89b2efSEryu Guan * 520ac89b2efSEryu Guan * @inode: inode whose nlink is being dropped 521ac89b2efSEryu Guan */ 522ac89b2efSEryu Guan static void v9fs_dec_count(struct inode *inode) 523ac89b2efSEryu Guan { 524ac89b2efSEryu Guan if (!S_ISDIR(inode->i_mode) || inode->i_nlink > 2) 525ac89b2efSEryu Guan drop_nlink(inode); 526ac89b2efSEryu Guan } 527ac89b2efSEryu Guan 528ac89b2efSEryu Guan /** 5292bad8471SEric Van Hensbergen * v9fs_remove - helper function to remove files and directories 53073c592b9SEric Van Hensbergen * @dir: directory inode that is being deleted 53148e370ffSAneesh Kumar K.V * @dentry: dentry that is being deleted 532fd2916bdSFabian Frederick * @flags: removing a directory 5332bad8471SEric Van Hensbergen * 5342bad8471SEric Van Hensbergen */ 5352bad8471SEric Van Hensbergen 53648e370ffSAneesh Kumar K.V static int v9fs_remove(struct inode *dir, struct dentry *dentry, int flags) 5372bad8471SEric Van Hensbergen { 53848e370ffSAneesh Kumar K.V struct inode *inode; 53948e370ffSAneesh Kumar K.V int retval = -EOPNOTSUPP; 54048e370ffSAneesh Kumar K.V struct p9_fid *v9fid, *dfid; 54148e370ffSAneesh Kumar K.V struct v9fs_session_info *v9ses; 5422bad8471SEric Van Hensbergen 5435d385153SJoe Perches p9_debug(P9_DEBUG_VFS, "inode: %p dentry: %p rmdir: %x\n", 54448e370ffSAneesh Kumar K.V dir, dentry, flags); 5452bad8471SEric Van Hensbergen 54648e370ffSAneesh Kumar K.V v9ses = v9fs_inode2v9ses(dir); 5472b0143b5SDavid Howells inode = d_inode(dentry); 54877d5a6b7SAl Viro dfid = v9fs_parent_fid(dentry); 54948e370ffSAneesh Kumar K.V if (IS_ERR(dfid)) { 55048e370ffSAneesh Kumar K.V retval = PTR_ERR(dfid); 5515d385153SJoe Perches p9_debug(P9_DEBUG_VFS, "fid lookup failed %d\n", retval); 55248e370ffSAneesh Kumar K.V return retval; 55348e370ffSAneesh Kumar K.V } 55448e370ffSAneesh Kumar K.V if (v9fs_proto_dotl(v9ses)) 555f88657ceSAneesh Kumar K.V retval = p9_client_unlinkat(dfid, dentry->d_name.name, 556f88657ceSAneesh Kumar K.V v9fs_at_to_dotl_flags(flags)); 5576636b6dcSJianyong Wu p9_client_clunk(dfid); 55848e370ffSAneesh Kumar K.V if (retval == -EOPNOTSUPP) { 55948e370ffSAneesh Kumar K.V /* Try the one based on path */ 56048e370ffSAneesh Kumar K.V v9fid = v9fs_fid_clone(dentry); 561da977b2cSEric Van Hensbergen if (IS_ERR(v9fid)) 562da977b2cSEric Van Hensbergen return PTR_ERR(v9fid); 563d994f405SAneesh Kumar K.V retval = p9_client_remove(v9fid); 56448e370ffSAneesh Kumar K.V } 565b271ec47SAneesh Kumar K.V if (!retval) { 566b271ec47SAneesh Kumar K.V /* 567b271ec47SAneesh Kumar K.V * directories on unlink should have zero 568b271ec47SAneesh Kumar K.V * link count 569b271ec47SAneesh Kumar K.V */ 57048e370ffSAneesh Kumar K.V if (flags & AT_REMOVEDIR) { 57148e370ffSAneesh Kumar K.V clear_nlink(inode); 572ac89b2efSEryu Guan v9fs_dec_count(dir); 573b271ec47SAneesh Kumar K.V } else 574ac89b2efSEryu Guan v9fs_dec_count(inode); 575d28c61f0SAneesh Kumar K.V 57648e370ffSAneesh Kumar K.V v9fs_invalidate_inode_attr(inode); 577d28c61f0SAneesh Kumar K.V v9fs_invalidate_inode_attr(dir); 578154372e6SEric Van Hensbergen 579154372e6SEric Van Hensbergen /* invalidate all fids associated with dentry */ 580154372e6SEric Van Hensbergen /* NOTE: This will not include open fids */ 581154372e6SEric Van Hensbergen dentry->d_op->d_release(dentry); 582b271ec47SAneesh Kumar K.V } 583d994f405SAneesh Kumar K.V return retval; 5842bad8471SEric Van Hensbergen } 5852bad8471SEric Van Hensbergen 586bd238fb4SLatchesar Ionkov /** 587bd238fb4SLatchesar Ionkov * v9fs_create - Create a file 588ee443996SEric Van Hensbergen * @v9ses: session information 589ee443996SEric Van Hensbergen * @dir: directory that dentry is being created in 590bd238fb4SLatchesar Ionkov * @dentry: dentry that is being created 5910e15597eSAbhishek Kulkarni * @extension: 9p2000.u extension string to support devices, etc. 592bd238fb4SLatchesar Ionkov * @perm: create permissions 593bd238fb4SLatchesar Ionkov * @mode: open mode 594bd238fb4SLatchesar Ionkov * 595bd238fb4SLatchesar Ionkov */ 596bd238fb4SLatchesar Ionkov static struct p9_fid * 597bd238fb4SLatchesar Ionkov v9fs_create(struct v9fs_session_info *v9ses, struct inode *dir, 598bd238fb4SLatchesar Ionkov struct dentry *dentry, char *extension, u32 perm, u8 mode) 599bd238fb4SLatchesar Ionkov { 600bd238fb4SLatchesar Ionkov int err; 6017880b43bSAl Viro const unsigned char *name; 6026636b6dcSJianyong Wu struct p9_fid *dfid, *ofid = NULL, *fid = NULL; 603bd238fb4SLatchesar Ionkov struct inode *inode; 604bd238fb4SLatchesar Ionkov 6054b8e9923SAl Viro p9_debug(P9_DEBUG_VFS, "name %pd\n", dentry); 60651a87c55SEric Van Hensbergen 607bd238fb4SLatchesar Ionkov err = 0; 6087880b43bSAl Viro name = dentry->d_name.name; 60977d5a6b7SAl Viro dfid = v9fs_parent_fid(dentry); 610bd238fb4SLatchesar Ionkov if (IS_ERR(dfid)) { 611bd238fb4SLatchesar Ionkov err = PTR_ERR(dfid); 6125d385153SJoe Perches p9_debug(P9_DEBUG_VFS, "fid lookup failed %d\n", err); 6136d27e64dSVenkateswararao Jujjuri return ERR_PTR(err); 614bd238fb4SLatchesar Ionkov } 615bd238fb4SLatchesar Ionkov 616bd238fb4SLatchesar Ionkov /* clone a fid to use for creation */ 6177d50a29fSAl Viro ofid = clone_fid(dfid); 618bd238fb4SLatchesar Ionkov if (IS_ERR(ofid)) { 619bd238fb4SLatchesar Ionkov err = PTR_ERR(ofid); 6205d385153SJoe Perches p9_debug(P9_DEBUG_VFS, "p9_client_walk failed %d\n", err); 6216636b6dcSJianyong Wu p9_client_clunk(dfid); 6226d27e64dSVenkateswararao Jujjuri return ERR_PTR(err); 623bd238fb4SLatchesar Ionkov } 624bd238fb4SLatchesar Ionkov 625bd238fb4SLatchesar Ionkov err = p9_client_fcreate(ofid, name, perm, mode, extension); 62651a87c55SEric Van Hensbergen if (err < 0) { 6275d385153SJoe Perches p9_debug(P9_DEBUG_VFS, "p9_client_fcreate failed %d\n", err); 6286636b6dcSJianyong Wu p9_client_clunk(dfid); 629bd238fb4SLatchesar Ionkov goto error; 63051a87c55SEric Van Hensbergen } 631bd238fb4SLatchesar Ionkov 632b6054793SAneesh Kumar K.V if (!(perm & P9_DMLINK)) { 633bd238fb4SLatchesar Ionkov /* now walk from the parent so we can get unopened fid */ 6346d27e64dSVenkateswararao Jujjuri fid = p9_client_walk(dfid, 1, &name, 1); 635bd238fb4SLatchesar Ionkov if (IS_ERR(fid)) { 636bd238fb4SLatchesar Ionkov err = PTR_ERR(fid); 637b6054793SAneesh Kumar K.V p9_debug(P9_DEBUG_VFS, 638b6054793SAneesh Kumar K.V "p9_client_walk failed %d\n", err); 639bd238fb4SLatchesar Ionkov fid = NULL; 6406636b6dcSJianyong Wu p9_client_clunk(dfid); 641bd238fb4SLatchesar Ionkov goto error; 6426d27e64dSVenkateswararao Jujjuri } 643b6054793SAneesh Kumar K.V /* 644b6054793SAneesh Kumar K.V * instantiate inode and assign the unopened fid to the dentry 645b6054793SAneesh Kumar K.V */ 646ed80fcfaSAneesh Kumar K.V inode = v9fs_get_new_inode_from_fid(v9ses, fid, dir->i_sb); 647bd238fb4SLatchesar Ionkov if (IS_ERR(inode)) { 648bd238fb4SLatchesar Ionkov err = PTR_ERR(inode); 649b6054793SAneesh Kumar K.V p9_debug(P9_DEBUG_VFS, 650b6054793SAneesh Kumar K.V "inode creation failed %d\n", err); 6516636b6dcSJianyong Wu p9_client_clunk(dfid); 652bd238fb4SLatchesar Ionkov goto error; 653bd238fb4SLatchesar Ionkov } 6542ea03e1dSAl Viro v9fs_fid_add(dentry, fid); 6555441ae5eSAneesh Kumar K.V d_instantiate(dentry, inode); 656b6054793SAneesh Kumar K.V } 6576636b6dcSJianyong Wu p9_client_clunk(dfid); 658bd238fb4SLatchesar Ionkov return ofid; 659bd238fb4SLatchesar Ionkov error: 660bd238fb4SLatchesar Ionkov if (ofid) 661bd238fb4SLatchesar Ionkov p9_client_clunk(ofid); 662bd238fb4SLatchesar Ionkov 663bd238fb4SLatchesar Ionkov if (fid) 664bd238fb4SLatchesar Ionkov p9_client_clunk(fid); 665bd238fb4SLatchesar Ionkov 666bd238fb4SLatchesar Ionkov return ERR_PTR(err); 667bd238fb4SLatchesar Ionkov } 668bd238fb4SLatchesar Ionkov 6692bad8471SEric Van Hensbergen /** 670e43ae79cSMiklos Szeredi * v9fs_vfs_create - VFS hook to create a regular file 671bc868036SDavid Howells * @mnt_userns: The user namespace of the mount 672bc868036SDavid Howells * @dir: The parent directory 673bc868036SDavid Howells * @dentry: The name of file to be created 674bc868036SDavid Howells * @mode: The UNIX file mode to set 675bc868036SDavid Howells * @excl: True if the file must not yet exist 676e43ae79cSMiklos Szeredi * 677e43ae79cSMiklos Szeredi * open(.., O_CREAT) is handled in v9fs_vfs_atomic_open(). This is only called 678e43ae79cSMiklos Szeredi * for mknod(2). 679e43ae79cSMiklos Szeredi * 6802bad8471SEric Van Hensbergen */ 6812bad8471SEric Van Hensbergen 6822bad8471SEric Van Hensbergen static int 683549c7297SChristian Brauner v9fs_vfs_create(struct user_namespace *mnt_userns, struct inode *dir, 684549c7297SChristian Brauner struct dentry *dentry, umode_t mode, bool excl) 6852bad8471SEric Van Hensbergen { 686e43ae79cSMiklos Szeredi struct v9fs_session_info *v9ses = v9fs_inode2v9ses(dir); 687e43ae79cSMiklos Szeredi u32 perm = unixmode2p9mode(v9ses, mode); 688e43ae79cSMiklos Szeredi struct p9_fid *fid; 6896a3124a3SLatchesar Ionkov 690e43ae79cSMiklos Szeredi /* P9_OEXCL? */ 691e43ae79cSMiklos Szeredi fid = v9fs_create(v9ses, dir, dentry, NULL, perm, P9_ORDWR); 692e43ae79cSMiklos Szeredi if (IS_ERR(fid)) 693e43ae79cSMiklos Szeredi return PTR_ERR(fid); 6946a3124a3SLatchesar Ionkov 695d28c61f0SAneesh Kumar K.V v9fs_invalidate_inode_attr(dir); 696bd238fb4SLatchesar Ionkov p9_client_clunk(fid); 6976a3124a3SLatchesar Ionkov 6986a3124a3SLatchesar Ionkov return 0; 6992bad8471SEric Van Hensbergen } 7002bad8471SEric Van Hensbergen 7012bad8471SEric Van Hensbergen /** 7022bad8471SEric Van Hensbergen * v9fs_vfs_mkdir - VFS mkdir hook to create a directory 703bc868036SDavid Howells * @mnt_userns: The user namespace of the mount 704ee443996SEric Van Hensbergen * @dir: inode that is being unlinked 7052bad8471SEric Van Hensbergen * @dentry: dentry that is being unlinked 7062bad8471SEric Van Hensbergen * @mode: mode for new directory 7072bad8471SEric Van Hensbergen * 7082bad8471SEric Van Hensbergen */ 7092bad8471SEric Van Hensbergen 710549c7297SChristian Brauner static int v9fs_vfs_mkdir(struct user_namespace *mnt_userns, struct inode *dir, 711549c7297SChristian Brauner struct dentry *dentry, umode_t mode) 7122bad8471SEric Van Hensbergen { 7136a3124a3SLatchesar Ionkov int err; 714bd238fb4SLatchesar Ionkov u32 perm; 715bd238fb4SLatchesar Ionkov struct p9_fid *fid; 716d28c61f0SAneesh Kumar K.V struct v9fs_session_info *v9ses; 7176a3124a3SLatchesar Ionkov 7184b8e9923SAl Viro p9_debug(P9_DEBUG_VFS, "name %pd\n", dentry); 719bd238fb4SLatchesar Ionkov err = 0; 7206a3124a3SLatchesar Ionkov v9ses = v9fs_inode2v9ses(dir); 7216a3124a3SLatchesar Ionkov perm = unixmode2p9mode(v9ses, mode | S_IFDIR); 722bd238fb4SLatchesar Ionkov fid = v9fs_create(v9ses, dir, dentry, NULL, perm, P9_OREAD); 723bd238fb4SLatchesar Ionkov if (IS_ERR(fid)) { 724bd238fb4SLatchesar Ionkov err = PTR_ERR(fid); 725bd238fb4SLatchesar Ionkov fid = NULL; 726d28c61f0SAneesh Kumar K.V } else { 727b271ec47SAneesh Kumar K.V inc_nlink(dir); 728d28c61f0SAneesh Kumar K.V v9fs_invalidate_inode_attr(dir); 729d28c61f0SAneesh Kumar K.V } 7306a3124a3SLatchesar Ionkov 731bd238fb4SLatchesar Ionkov if (fid) 732bd238fb4SLatchesar Ionkov p9_client_clunk(fid); 7336a3124a3SLatchesar Ionkov 7346a3124a3SLatchesar Ionkov return err; 7352bad8471SEric Van Hensbergen } 7362bad8471SEric Van Hensbergen 7372bad8471SEric Van Hensbergen /** 7382bad8471SEric Van Hensbergen * v9fs_vfs_lookup - VFS lookup hook to "walk" to a new inode 7392bad8471SEric Van Hensbergen * @dir: inode that is being walked from 7402bad8471SEric Van Hensbergen * @dentry: dentry that is being walked to? 741fd2916bdSFabian Frederick * @flags: lookup flags (unused) 7422bad8471SEric Van Hensbergen * 7432bad8471SEric Van Hensbergen */ 7442bad8471SEric Van Hensbergen 74553c06f4eSAneesh Kumar K.V struct dentry *v9fs_vfs_lookup(struct inode *dir, struct dentry *dentry, 74600cd8dd3SAl Viro unsigned int flags) 7472bad8471SEric Van Hensbergen { 74873f50717SAneesh Kumar K.V struct dentry *res; 7492bad8471SEric Van Hensbergen struct v9fs_session_info *v9ses; 750bd238fb4SLatchesar Ionkov struct p9_fid *dfid, *fid; 7512bad8471SEric Van Hensbergen struct inode *inode; 7527880b43bSAl Viro const unsigned char *name; 7532bad8471SEric Van Hensbergen 7544b8e9923SAl Viro p9_debug(P9_DEBUG_VFS, "dir: %p dentry: (%pd) %p flags: %x\n", 7554b8e9923SAl Viro dir, dentry, dentry, flags); 7562bad8471SEric Van Hensbergen 75711e9b49bSSripathi Kodi if (dentry->d_name.len > NAME_MAX) 75811e9b49bSSripathi Kodi return ERR_PTR(-ENAMETOOLONG); 75911e9b49bSSripathi Kodi 7602bad8471SEric Van Hensbergen v9ses = v9fs_inode2v9ses(dir); 761a534c8d1SAneesh Kumar K.V /* We can walk d_parent because we hold the dir->i_mutex */ 76277d5a6b7SAl Viro dfid = v9fs_parent_fid(dentry); 763bd238fb4SLatchesar Ionkov if (IS_ERR(dfid)) 764e231c2eeSDavid Howells return ERR_CAST(dfid); 7652bad8471SEric Van Hensbergen 76673f50717SAneesh Kumar K.V /* 76773f50717SAneesh Kumar K.V * Make sure we don't use a wrong inode due to parallel 76873f50717SAneesh Kumar K.V * unlink. For cached mode create calls request for new 76973f50717SAneesh Kumar K.V * inode. But with cache disabled, lookup should do this. 77073f50717SAneesh Kumar K.V */ 771500e2ab6SAl Viro name = dentry->d_name.name; 772500e2ab6SAl Viro fid = p9_client_walk(dfid, 1, &name, 1); 7736636b6dcSJianyong Wu p9_client_clunk(dfid); 774500e2ab6SAl Viro if (fid == ERR_PTR(-ENOENT)) 775500e2ab6SAl Viro inode = NULL; 776500e2ab6SAl Viro else if (IS_ERR(fid)) 777500e2ab6SAl Viro inode = ERR_CAST(fid); 778500e2ab6SAl Viro else if (v9ses->cache == CACHE_LOOSE || v9ses->cache == CACHE_FSCACHE) 779a78ce05dSAneesh Kumar K.V inode = v9fs_get_inode_from_fid(v9ses, fid, dir->i_sb); 78073f50717SAneesh Kumar K.V else 78173f50717SAneesh Kumar K.V inode = v9fs_get_new_inode_from_fid(v9ses, fid, dir->i_sb); 78273f50717SAneesh Kumar K.V /* 78373f50717SAneesh Kumar K.V * If we had a rename on the server and a parallel lookup 78473f50717SAneesh Kumar K.V * for the new name, then make sure we instantiate with 78573f50717SAneesh Kumar K.V * the new name. ie look up for a/b, while on server somebody 78673f50717SAneesh Kumar K.V * moved b under k and client parallely did a lookup for 78773f50717SAneesh Kumar K.V * k/b. 78873f50717SAneesh Kumar K.V */ 78941d28bcaSAl Viro res = d_splice_alias(inode, dentry); 790500e2ab6SAl Viro if (!IS_ERR(fid)) { 791a3b2157eSAl Viro if (!res) 792a3b2157eSAl Viro v9fs_fid_add(dentry, fid); 793a3b2157eSAl Viro else if (!IS_ERR(res)) 794a3b2157eSAl Viro v9fs_fid_add(res, fid); 795a3b2157eSAl Viro else 796bd238fb4SLatchesar Ionkov p9_client_clunk(fid); 797500e2ab6SAl Viro } 7987b5be621SAl Viro return res; 7992bad8471SEric Van Hensbergen } 8002bad8471SEric Van Hensbergen 801d9585277SAl Viro static int 802e43ae79cSMiklos Szeredi v9fs_vfs_atomic_open(struct inode *dir, struct dentry *dentry, 80344907d79SAl Viro struct file *file, unsigned flags, umode_t mode) 804e43ae79cSMiklos Szeredi { 805e43ae79cSMiklos Szeredi int err; 806e43ae79cSMiklos Szeredi u32 perm; 807e43ae79cSMiklos Szeredi struct v9fs_inode *v9inode; 808e43ae79cSMiklos Szeredi struct v9fs_session_info *v9ses; 809e43ae79cSMiklos Szeredi struct p9_fid *fid, *inode_fid; 810e43ae79cSMiklos Szeredi struct dentry *res = NULL; 811987a6485SGreg Kurz struct inode *inode; 812e43ae79cSMiklos Szeredi 81300699ad8SAl Viro if (d_in_lookup(dentry)) { 81400cd8dd3SAl Viro res = v9fs_vfs_lookup(dir, dentry, 0); 815e43ae79cSMiklos Szeredi if (IS_ERR(res)) 816d9585277SAl Viro return PTR_ERR(res); 817e43ae79cSMiklos Szeredi 818e43ae79cSMiklos Szeredi if (res) 819e43ae79cSMiklos Szeredi dentry = res; 820e43ae79cSMiklos Szeredi } 821e43ae79cSMiklos Szeredi 822e43ae79cSMiklos Szeredi /* Only creates */ 8232b0143b5SDavid Howells if (!(flags & O_CREAT) || d_really_is_positive(dentry)) 824e45198a6SAl Viro return finish_no_open(file, res); 825e43ae79cSMiklos Szeredi 826e43ae79cSMiklos Szeredi err = 0; 827fae74696SGeyslan G. Bem 828e43ae79cSMiklos Szeredi v9ses = v9fs_inode2v9ses(dir); 829e43ae79cSMiklos Szeredi perm = unixmode2p9mode(v9ses, mode); 830e43ae79cSMiklos Szeredi fid = v9fs_create(v9ses, dir, dentry, NULL, perm, 831e43ae79cSMiklos Szeredi v9fs_uflags2omode(flags, 832e43ae79cSMiklos Szeredi v9fs_proto_dotu(v9ses))); 833e43ae79cSMiklos Szeredi if (IS_ERR(fid)) { 834e43ae79cSMiklos Szeredi err = PTR_ERR(fid); 835e43ae79cSMiklos Szeredi fid = NULL; 836e43ae79cSMiklos Szeredi goto error; 837e43ae79cSMiklos Szeredi } 838e43ae79cSMiklos Szeredi 839e43ae79cSMiklos Szeredi v9fs_invalidate_inode_attr(dir); 840987a6485SGreg Kurz inode = d_inode(dentry); 841987a6485SGreg Kurz v9inode = V9FS_I(inode); 842e43ae79cSMiklos Szeredi mutex_lock(&v9inode->v_mutex); 843fb89b45cSDominique Martinet if ((v9ses->cache == CACHE_LOOSE || v9ses->cache == CACHE_FSCACHE) && 844fb89b45cSDominique Martinet !v9inode->writeback_fid && 845e43ae79cSMiklos Szeredi ((flags & O_ACCMODE) != O_RDONLY)) { 846e43ae79cSMiklos Szeredi /* 847e43ae79cSMiklos Szeredi * clone a fid and add it to writeback_fid 848e43ae79cSMiklos Szeredi * we do it during open time instead of 849e43ae79cSMiklos Szeredi * page dirty time via write_begin/page_mkwrite 850e43ae79cSMiklos Szeredi * because we want write after unlink usecase 851e43ae79cSMiklos Szeredi * to work. 852e43ae79cSMiklos Szeredi */ 853e43ae79cSMiklos Szeredi inode_fid = v9fs_writeback_fid(dentry); 854e43ae79cSMiklos Szeredi if (IS_ERR(inode_fid)) { 855e43ae79cSMiklos Szeredi err = PTR_ERR(inode_fid); 856e43ae79cSMiklos Szeredi mutex_unlock(&v9inode->v_mutex); 857e43ae79cSMiklos Szeredi goto error; 858e43ae79cSMiklos Szeredi } 859e43ae79cSMiklos Szeredi v9inode->writeback_fid = (void *) inode_fid; 860e43ae79cSMiklos Szeredi } 861e43ae79cSMiklos Szeredi mutex_unlock(&v9inode->v_mutex); 862be12af3eSAl Viro err = finish_open(file, dentry, generic_file_open); 86330d90494SAl Viro if (err) 864e43ae79cSMiklos Szeredi goto error; 865e43ae79cSMiklos Szeredi 86630d90494SAl Viro file->private_data = fid; 867fb89b45cSDominique Martinet if (v9ses->cache == CACHE_LOOSE || v9ses->cache == CACHE_FSCACHE) 8682b0143b5SDavid Howells v9fs_cache_inode_set_cookie(d_inode(dentry), file); 869987a6485SGreg Kurz v9fs_open_fid_add(inode, fid); 870e43ae79cSMiklos Szeredi 87173a09dd9SAl Viro file->f_mode |= FMODE_CREATED; 872e43ae79cSMiklos Szeredi out: 873e43ae79cSMiklos Szeredi dput(res); 874d9585277SAl Viro return err; 875e43ae79cSMiklos Szeredi 876e43ae79cSMiklos Szeredi error: 877e43ae79cSMiklos Szeredi if (fid) 878e43ae79cSMiklos Szeredi p9_client_clunk(fid); 879e43ae79cSMiklos Szeredi goto out; 880e43ae79cSMiklos Szeredi } 881e43ae79cSMiklos Szeredi 8822bad8471SEric Van Hensbergen /** 8832bad8471SEric Van Hensbergen * v9fs_vfs_unlink - VFS unlink hook to delete an inode 8842bad8471SEric Van Hensbergen * @i: inode that is being unlinked 88573c592b9SEric Van Hensbergen * @d: dentry that is being unlinked 8862bad8471SEric Van Hensbergen * 8872bad8471SEric Van Hensbergen */ 8882bad8471SEric Van Hensbergen 88953c06f4eSAneesh Kumar K.V int v9fs_vfs_unlink(struct inode *i, struct dentry *d) 8902bad8471SEric Van Hensbergen { 8912bad8471SEric Van Hensbergen return v9fs_remove(i, d, 0); 8922bad8471SEric Van Hensbergen } 8932bad8471SEric Van Hensbergen 8942bad8471SEric Van Hensbergen /** 8952bad8471SEric Van Hensbergen * v9fs_vfs_rmdir - VFS unlink hook to delete a directory 8962bad8471SEric Van Hensbergen * @i: inode that is being unlinked 89773c592b9SEric Van Hensbergen * @d: dentry that is being unlinked 8982bad8471SEric Van Hensbergen * 8992bad8471SEric Van Hensbergen */ 9002bad8471SEric Van Hensbergen 90153c06f4eSAneesh Kumar K.V int v9fs_vfs_rmdir(struct inode *i, struct dentry *d) 9022bad8471SEric Van Hensbergen { 90348e370ffSAneesh Kumar K.V return v9fs_remove(i, d, AT_REMOVEDIR); 9042bad8471SEric Van Hensbergen } 9052bad8471SEric Van Hensbergen 9062bad8471SEric Van Hensbergen /** 9072bad8471SEric Van Hensbergen * v9fs_vfs_rename - VFS hook to rename an inode 908bc868036SDavid Howells * @mnt_userns: The user namespace of the mount 9092bad8471SEric Van Hensbergen * @old_dir: old dir inode 9102bad8471SEric Van Hensbergen * @old_dentry: old dentry 9112bad8471SEric Van Hensbergen * @new_dir: new dir inode 9122bad8471SEric Van Hensbergen * @new_dentry: new dentry 913bc868036SDavid Howells * @flags: RENAME_* flags 9142bad8471SEric Van Hensbergen * 9152bad8471SEric Van Hensbergen */ 9162bad8471SEric Van Hensbergen 91753c06f4eSAneesh Kumar K.V int 918549c7297SChristian Brauner v9fs_vfs_rename(struct user_namespace *mnt_userns, struct inode *old_dir, 919549c7297SChristian Brauner struct dentry *old_dentry, struct inode *new_dir, 920549c7297SChristian Brauner struct dentry *new_dentry, unsigned int flags) 9212bad8471SEric Van Hensbergen { 922d28c61f0SAneesh Kumar K.V int retval; 923bd238fb4SLatchesar Ionkov struct inode *old_inode; 924b271ec47SAneesh Kumar K.V struct inode *new_inode; 925bd238fb4SLatchesar Ionkov struct v9fs_session_info *v9ses; 9266636b6dcSJianyong Wu struct p9_fid *oldfid, *dfid; 927bd238fb4SLatchesar Ionkov struct p9_fid *olddirfid; 928bd238fb4SLatchesar Ionkov struct p9_fid *newdirfid; 929bd238fb4SLatchesar Ionkov struct p9_wstat wstat; 9302bad8471SEric Van Hensbergen 9311cd66c93SMiklos Szeredi if (flags) 9321cd66c93SMiklos Szeredi return -EINVAL; 9331cd66c93SMiklos Szeredi 9345d385153SJoe Perches p9_debug(P9_DEBUG_VFS, "\n"); 935bd238fb4SLatchesar Ionkov retval = 0; 9362b0143b5SDavid Howells old_inode = d_inode(old_dentry); 9372b0143b5SDavid Howells new_inode = d_inode(new_dentry); 938bd238fb4SLatchesar Ionkov v9ses = v9fs_inode2v9ses(old_inode); 939bd238fb4SLatchesar Ionkov oldfid = v9fs_fid_lookup(old_dentry); 940da977b2cSEric Van Hensbergen if (IS_ERR(oldfid)) 941da977b2cSEric Van Hensbergen return PTR_ERR(oldfid); 942da977b2cSEric Van Hensbergen 9436636b6dcSJianyong Wu dfid = v9fs_parent_fid(old_dentry); 9446636b6dcSJianyong Wu olddirfid = clone_fid(dfid); 9456636b6dcSJianyong Wu if (dfid && !IS_ERR(dfid)) 9466636b6dcSJianyong Wu p9_client_clunk(dfid); 9476636b6dcSJianyong Wu 948da977b2cSEric Van Hensbergen if (IS_ERR(olddirfid)) { 949da977b2cSEric Van Hensbergen retval = PTR_ERR(olddirfid); 950bd238fb4SLatchesar Ionkov goto done; 951da977b2cSEric Van Hensbergen } 952da977b2cSEric Van Hensbergen 9536636b6dcSJianyong Wu dfid = v9fs_parent_fid(new_dentry); 9546636b6dcSJianyong Wu newdirfid = clone_fid(dfid); 9556636b6dcSJianyong Wu p9_client_clunk(dfid); 9566636b6dcSJianyong Wu 957da977b2cSEric Van Hensbergen if (IS_ERR(newdirfid)) { 958da977b2cSEric Van Hensbergen retval = PTR_ERR(newdirfid); 959bd238fb4SLatchesar Ionkov goto clunk_olddir; 9602bad8471SEric Van Hensbergen } 9612bad8471SEric Van Hensbergen 962a534c8d1SAneesh Kumar K.V down_write(&v9ses->rename_sem); 9634681dbdaSSripathi Kodi if (v9fs_proto_dotl(v9ses)) { 9649e8fb38eSAneesh Kumar K.V retval = p9_client_renameat(olddirfid, old_dentry->d_name.name, 9659e8fb38eSAneesh Kumar K.V newdirfid, new_dentry->d_name.name); 9669e8fb38eSAneesh Kumar K.V if (retval == -EOPNOTSUPP) 9674681dbdaSSripathi Kodi retval = p9_client_rename(oldfid, newdirfid, 9689e8fb38eSAneesh Kumar K.V new_dentry->d_name.name); 9699e8fb38eSAneesh Kumar K.V if (retval != -EOPNOTSUPP) 9704681dbdaSSripathi Kodi goto clunk_newdir; 9714681dbdaSSripathi Kodi } 972a534c8d1SAneesh Kumar K.V if (old_dentry->d_parent != new_dentry->d_parent) { 973a534c8d1SAneesh Kumar K.V /* 974a534c8d1SAneesh Kumar K.V * 9P .u can only handle file rename in the same directory 975a534c8d1SAneesh Kumar K.V */ 9764681dbdaSSripathi Kodi 9775d385153SJoe Perches p9_debug(P9_DEBUG_ERROR, "old dir and new dir are different\n"); 978621997cdSEric Van Hensbergen retval = -EXDEV; 979bd238fb4SLatchesar Ionkov goto clunk_newdir; 9802bad8471SEric Van Hensbergen } 981531b1094SLatchesar Ionkov v9fs_blank_wstat(&wstat); 982ba17674fSLatchesar Ionkov wstat.muid = v9ses->uname; 9837880b43bSAl Viro wstat.name = new_dentry->d_name.name; 984bd238fb4SLatchesar Ionkov retval = p9_client_wstat(oldfid, &wstat); 9852bad8471SEric Van Hensbergen 986bd238fb4SLatchesar Ionkov clunk_newdir: 987b271ec47SAneesh Kumar K.V if (!retval) { 988b271ec47SAneesh Kumar K.V if (new_inode) { 989b271ec47SAneesh Kumar K.V if (S_ISDIR(new_inode->i_mode)) 990b271ec47SAneesh Kumar K.V clear_nlink(new_inode); 991b271ec47SAneesh Kumar K.V else 992ac89b2efSEryu Guan v9fs_dec_count(new_inode); 993b271ec47SAneesh Kumar K.V } 994b271ec47SAneesh Kumar K.V if (S_ISDIR(old_inode->i_mode)) { 995b271ec47SAneesh Kumar K.V if (!new_inode) 996b271ec47SAneesh Kumar K.V inc_nlink(new_dir); 997ac89b2efSEryu Guan v9fs_dec_count(old_dir); 998b271ec47SAneesh Kumar K.V } 9993bc86de3SAneesh Kumar K.V v9fs_invalidate_inode_attr(old_inode); 1000d28c61f0SAneesh Kumar K.V v9fs_invalidate_inode_attr(old_dir); 1001d28c61f0SAneesh Kumar K.V v9fs_invalidate_inode_attr(new_dir); 10023bc86de3SAneesh Kumar K.V 1003a534c8d1SAneesh Kumar K.V /* successful rename */ 1004a534c8d1SAneesh Kumar K.V d_move(old_dentry, new_dentry); 1005b271ec47SAneesh Kumar K.V } 1006a534c8d1SAneesh Kumar K.V up_write(&v9ses->rename_sem); 100722150c4fSLatchesar Ionkov p9_client_clunk(newdirfid); 10082bad8471SEric Van Hensbergen 1009bd238fb4SLatchesar Ionkov clunk_olddir: 101022150c4fSLatchesar Ionkov p9_client_clunk(olddirfid); 10112bad8471SEric Van Hensbergen 1012bd238fb4SLatchesar Ionkov done: 10136636b6dcSJianyong Wu p9_client_clunk(oldfid); 10142bad8471SEric Van Hensbergen return retval; 10152bad8471SEric Van Hensbergen } 10162bad8471SEric Van Hensbergen 10172bad8471SEric Van Hensbergen /** 1018943ffb58SAdrian Bunk * v9fs_vfs_getattr - retrieve file metadata 1019bc868036SDavid Howells * @mnt_userns: The user namespace of the mount 1020a528d35eSDavid Howells * @path: Object to query 1021ee443996SEric Van Hensbergen * @stat: metadata structure to populate 1022a528d35eSDavid Howells * @request_mask: Mask of STATX_xxx flags indicating the caller's interests 1023a528d35eSDavid Howells * @flags: AT_STATX_xxx setting 10242bad8471SEric Van Hensbergen * 10252bad8471SEric Van Hensbergen */ 10262bad8471SEric Van Hensbergen 10272bad8471SEric Van Hensbergen static int 1028549c7297SChristian Brauner v9fs_vfs_getattr(struct user_namespace *mnt_userns, const struct path *path, 1029549c7297SChristian Brauner struct kstat *stat, u32 request_mask, unsigned int flags) 10302bad8471SEric Van Hensbergen { 1031a528d35eSDavid Howells struct dentry *dentry = path->dentry; 1032bd238fb4SLatchesar Ionkov struct v9fs_session_info *v9ses; 1033bd238fb4SLatchesar Ionkov struct p9_fid *fid; 103451a87c55SEric Van Hensbergen struct p9_wstat *st; 10352bad8471SEric Van Hensbergen 10365d385153SJoe Perches p9_debug(P9_DEBUG_VFS, "dentry: %p\n", dentry); 103742869c8aSAneesh Kumar K.V v9ses = v9fs_dentry2v9ses(dentry); 1038a1211908SAneesh Kumar K.V if (v9ses->cache == CACHE_LOOSE || v9ses->cache == CACHE_FSCACHE) { 10390d56a451SChristian Brauner generic_fillattr(&init_user_ns, d_inode(dentry), stat); 1040a1211908SAneesh Kumar K.V return 0; 1041a1211908SAneesh Kumar K.V } 1042bd238fb4SLatchesar Ionkov fid = v9fs_fid_lookup(dentry); 1043da977b2cSEric Van Hensbergen if (IS_ERR(fid)) 1044da977b2cSEric Van Hensbergen return PTR_ERR(fid); 10452bad8471SEric Van Hensbergen 1046bd238fb4SLatchesar Ionkov st = p9_client_stat(fid); 10476636b6dcSJianyong Wu p9_client_clunk(fid); 1048bd238fb4SLatchesar Ionkov if (IS_ERR(st)) 1049bd238fb4SLatchesar Ionkov return PTR_ERR(st); 10502bad8471SEric Van Hensbergen 10515e3cc1eeSHou Tao v9fs_stat2inode(st, d_inode(dentry), dentry->d_sb, 0); 10520d56a451SChristian Brauner generic_fillattr(&init_user_ns, d_inode(dentry), stat); 10532bad8471SEric Van Hensbergen 105462b2be59SLatchesar Ionkov p9stat_free(st); 1055bd238fb4SLatchesar Ionkov kfree(st); 1056bd238fb4SLatchesar Ionkov return 0; 10572bad8471SEric Van Hensbergen } 10582bad8471SEric Van Hensbergen 10592bad8471SEric Van Hensbergen /** 10602bad8471SEric Van Hensbergen * v9fs_vfs_setattr - set file metadata 1061bc868036SDavid Howells * @mnt_userns: The user namespace of the mount 10622bad8471SEric Van Hensbergen * @dentry: file whose metadata to set 10632bad8471SEric Van Hensbergen * @iattr: metadata assignment structure 10642bad8471SEric Van Hensbergen * 10652bad8471SEric Van Hensbergen */ 10662bad8471SEric Van Hensbergen 1067549c7297SChristian Brauner static int v9fs_vfs_setattr(struct user_namespace *mnt_userns, 1068549c7297SChristian Brauner struct dentry *dentry, struct iattr *iattr) 10692bad8471SEric Van Hensbergen { 10706636b6dcSJianyong Wu int retval, use_dentry = 0; 1071bd238fb4SLatchesar Ionkov struct v9fs_session_info *v9ses; 107266246641SJianyong Wu struct p9_fid *fid = NULL; 1073bd238fb4SLatchesar Ionkov struct p9_wstat wstat; 10742bad8471SEric Van Hensbergen 10755d385153SJoe Perches p9_debug(P9_DEBUG_VFS, "\n"); 10762f221d6fSChristian Brauner retval = setattr_prepare(&init_user_ns, dentry, iattr); 1077059c138bSAneesh Kumar K.V if (retval) 1078059c138bSAneesh Kumar K.V return retval; 1079059c138bSAneesh Kumar K.V 1080bd238fb4SLatchesar Ionkov retval = -EPERM; 108142869c8aSAneesh Kumar K.V v9ses = v9fs_dentry2v9ses(dentry); 108266246641SJianyong Wu if (iattr->ia_valid & ATTR_FILE) { 108366246641SJianyong Wu fid = iattr->ia_file->private_data; 108466246641SJianyong Wu WARN_ON(!fid); 108566246641SJianyong Wu } 10866636b6dcSJianyong Wu if (!fid) { 1087bd238fb4SLatchesar Ionkov fid = v9fs_fid_lookup(dentry); 10886636b6dcSJianyong Wu use_dentry = 1; 10896636b6dcSJianyong Wu } 1090da977b2cSEric Van Hensbergen if(IS_ERR(fid)) 1091da977b2cSEric Van Hensbergen return PTR_ERR(fid); 10922bad8471SEric Van Hensbergen 1093531b1094SLatchesar Ionkov v9fs_blank_wstat(&wstat); 10942bad8471SEric Van Hensbergen if (iattr->ia_valid & ATTR_MODE) 1095531b1094SLatchesar Ionkov wstat.mode = unixmode2p9mode(v9ses, iattr->ia_mode); 10962bad8471SEric Van Hensbergen 10972bad8471SEric Van Hensbergen if (iattr->ia_valid & ATTR_MTIME) 1098531b1094SLatchesar Ionkov wstat.mtime = iattr->ia_mtime.tv_sec; 10992bad8471SEric Van Hensbergen 11002bad8471SEric Van Hensbergen if (iattr->ia_valid & ATTR_ATIME) 1101531b1094SLatchesar Ionkov wstat.atime = iattr->ia_atime.tv_sec; 11022bad8471SEric Van Hensbergen 11032bad8471SEric Van Hensbergen if (iattr->ia_valid & ATTR_SIZE) 1104531b1094SLatchesar Ionkov wstat.length = iattr->ia_size; 11052bad8471SEric Van Hensbergen 1106dd6102fbSSripathi Kodi if (v9fs_proto_dotu(v9ses)) { 1107531b1094SLatchesar Ionkov if (iattr->ia_valid & ATTR_UID) 1108531b1094SLatchesar Ionkov wstat.n_uid = iattr->ia_uid; 11092bad8471SEric Van Hensbergen 1110531b1094SLatchesar Ionkov if (iattr->ia_valid & ATTR_GID) 1111531b1094SLatchesar Ionkov wstat.n_gid = iattr->ia_gid; 11122bad8471SEric Van Hensbergen } 1113059c138bSAneesh Kumar K.V 11143dc5436aSAneesh Kumar K.V /* Write all dirty data */ 1115e36cb0b8SDavid Howells if (d_is_reg(dentry)) 11162b0143b5SDavid Howells filemap_write_and_wait(d_inode(dentry)->i_mapping); 11173dc5436aSAneesh Kumar K.V 1118f10fc50fSAneesh Kumar K.V retval = p9_client_wstat(fid, &wstat); 11196636b6dcSJianyong Wu 11206636b6dcSJianyong Wu if (use_dentry) 11216636b6dcSJianyong Wu p9_client_clunk(fid); 11226636b6dcSJianyong Wu 1123f10fc50fSAneesh Kumar K.V if (retval < 0) 1124f10fc50fSAneesh Kumar K.V return retval; 1125059c138bSAneesh Kumar K.V 1126059c138bSAneesh Kumar K.V if ((iattr->ia_valid & ATTR_SIZE) && 11272b0143b5SDavid Howells iattr->ia_size != i_size_read(d_inode(dentry))) 11282b0143b5SDavid Howells truncate_setsize(d_inode(dentry), iattr->ia_size); 1129059c138bSAneesh Kumar K.V 11302b0143b5SDavid Howells v9fs_invalidate_inode_attr(d_inode(dentry)); 11311025774cSChristoph Hellwig 11322f221d6fSChristian Brauner setattr_copy(&init_user_ns, d_inode(dentry), iattr); 11332b0143b5SDavid Howells mark_inode_dirty(d_inode(dentry)); 11341025774cSChristoph Hellwig return 0; 11352bad8471SEric Van Hensbergen } 11362bad8471SEric Van Hensbergen 11372bad8471SEric Van Hensbergen /** 1138531b1094SLatchesar Ionkov * v9fs_stat2inode - populate an inode structure with mistat info 1139531b1094SLatchesar Ionkov * @stat: Plan 9 metadata (mistat) structure 11402bad8471SEric Van Hensbergen * @inode: inode to populate 11412bad8471SEric Van Hensbergen * @sb: superblock of filesystem 11425e3cc1eeSHou Tao * @flags: control flags (e.g. V9FS_STAT2INODE_KEEP_ISIZE) 11432bad8471SEric Van Hensbergen * 11442bad8471SEric Van Hensbergen */ 11452bad8471SEric Van Hensbergen 11462bad8471SEric Van Hensbergen void 114751a87c55SEric Van Hensbergen v9fs_stat2inode(struct p9_wstat *stat, struct inode *inode, 11485e3cc1eeSHou Tao struct super_block *sb, unsigned int flags) 11492bad8471SEric Van Hensbergen { 11503eda0de6SAl Viro umode_t mode; 11512bad8471SEric Van Hensbergen struct v9fs_session_info *v9ses = sb->s_fs_info; 1152b3cbea03SAneesh Kumar K.V struct v9fs_inode *v9inode = V9FS_I(inode); 11532bad8471SEric Van Hensbergen 1154bfe86848SMiklos Szeredi set_nlink(inode, 1); 11552bad8471SEric Van Hensbergen 1156531b1094SLatchesar Ionkov inode->i_atime.tv_sec = stat->atime; 1157531b1094SLatchesar Ionkov inode->i_mtime.tv_sec = stat->mtime; 1158531b1094SLatchesar Ionkov inode->i_ctime.tv_sec = stat->mtime; 11592bad8471SEric Van Hensbergen 1160bd32b82dSLatchesar Ionkov inode->i_uid = v9ses->dfltuid; 1161bd32b82dSLatchesar Ionkov inode->i_gid = v9ses->dfltgid; 11622bad8471SEric Van Hensbergen 1163dd6102fbSSripathi Kodi if (v9fs_proto_dotu(v9ses)) { 1164531b1094SLatchesar Ionkov inode->i_uid = stat->n_uid; 1165531b1094SLatchesar Ionkov inode->i_gid = stat->n_gid; 1166531b1094SLatchesar Ionkov } 11675717144aSAneesh Kumar K.V if ((S_ISREG(inode->i_mode)) || (S_ISDIR(inode->i_mode))) { 11689652c732SAl Viro if (v9fs_proto_dotu(v9ses)) { 11699652c732SAl Viro unsigned int i_nlink; 11705717144aSAneesh Kumar K.V /* 11719652c732SAl Viro * Hadlink support got added later to the .u extension. 11729652c732SAl Viro * So there can be a server out there that doesn't 11739652c732SAl Viro * support this even with .u extension. That would 11749652c732SAl Viro * just leave us with stat->extension being an empty 11759652c732SAl Viro * string, though. 11765717144aSAneesh Kumar K.V */ 11775717144aSAneesh Kumar K.V /* HARDLINKCOUNT %u */ 11789652c732SAl Viro if (sscanf(stat->extension, 11799652c732SAl Viro " HARDLINKCOUNT %u", &i_nlink) == 1) 1180bfe86848SMiklos Szeredi set_nlink(inode, i_nlink); 11815717144aSAneesh Kumar K.V } 11825717144aSAneesh Kumar K.V } 1183df345c67SAneesh Kumar K.V mode = p9mode2perm(v9ses, stat); 118445089142SAneesh Kumar K.V mode |= inode->i_mode & ~S_IALLUGO; 118545089142SAneesh Kumar K.V inode->i_mode = mode; 11862bad8471SEric Van Hensbergen 11875e3cc1eeSHou Tao if (!(flags & V9FS_STAT2INODE_KEEP_ISIZE)) 11885e3cc1eeSHou Tao v9fs_i_size_write(inode, stat->length); 1189bd238fb4SLatchesar Ionkov /* not real number of blocks, but 512 byte ones ... */ 11905e3cc1eeSHou Tao inode->i_blocks = (stat->length + 512 - 1) >> 9; 1191b3cbea03SAneesh Kumar K.V v9inode->cache_validity &= ~V9FS_INO_INVALID_ATTR; 11922bad8471SEric Van Hensbergen } 11932bad8471SEric Van Hensbergen 11942bad8471SEric Van Hensbergen /** 11952bad8471SEric Van Hensbergen * v9fs_qid2ino - convert qid into inode number 11962bad8471SEric Van Hensbergen * @qid: qid to hash 11972bad8471SEric Van Hensbergen * 11982bad8471SEric Van Hensbergen * BUG: potential for inode number collisions? 11992bad8471SEric Van Hensbergen */ 12002bad8471SEric Van Hensbergen 1201bd238fb4SLatchesar Ionkov ino_t v9fs_qid2ino(struct p9_qid *qid) 12022bad8471SEric Van Hensbergen { 12032bad8471SEric Van Hensbergen u64 path = qid->path + 2; 12042bad8471SEric Van Hensbergen ino_t i = 0; 12052bad8471SEric Van Hensbergen 12062bad8471SEric Van Hensbergen if (sizeof(ino_t) == sizeof(path)) 12072bad8471SEric Van Hensbergen memcpy(&i, &path, sizeof(ino_t)); 12082bad8471SEric Van Hensbergen else 12092bad8471SEric Van Hensbergen i = (ino_t) (path ^ (path >> 32)); 12102bad8471SEric Van Hensbergen 12112bad8471SEric Van Hensbergen return i; 12122bad8471SEric Van Hensbergen } 12132bad8471SEric Van Hensbergen 12142bad8471SEric Van Hensbergen /** 12156b255391SAl Viro * v9fs_vfs_get_link - follow a symlink path 12162bad8471SEric Van Hensbergen * @dentry: dentry for symlink 12176b255391SAl Viro * @inode: inode for symlink 1218fceef393SAl Viro * @done: delayed call for when we are done with the return value 12192bad8471SEric Van Hensbergen */ 12202bad8471SEric Van Hensbergen 12216b255391SAl Viro static const char *v9fs_vfs_get_link(struct dentry *dentry, 1222fceef393SAl Viro struct inode *inode, 1223fceef393SAl Viro struct delayed_call *done) 12242bad8471SEric Van Hensbergen { 12256b255391SAl Viro struct v9fs_session_info *v9ses; 12266b255391SAl Viro struct p9_fid *fid; 122790e4fc88SAl Viro struct p9_wstat *st; 1228680baacbSAl Viro char *res; 12292bad8471SEric Van Hensbergen 12306b255391SAl Viro if (!dentry) 12316b255391SAl Viro return ERR_PTR(-ECHILD); 12326b255391SAl Viro 12336b255391SAl Viro v9ses = v9fs_dentry2v9ses(dentry); 12346b255391SAl Viro fid = v9fs_fid_lookup(dentry); 12354b8e9923SAl Viro p9_debug(P9_DEBUG_VFS, "%pd\n", dentry); 12362bad8471SEric Van Hensbergen 123790e4fc88SAl Viro if (IS_ERR(fid)) 123890e4fc88SAl Viro return ERR_CAST(fid); 12392bad8471SEric Van Hensbergen 124090e4fc88SAl Viro if (!v9fs_proto_dotu(v9ses)) 124190e4fc88SAl Viro return ERR_PTR(-EBADF); 124290e4fc88SAl Viro 124390e4fc88SAl Viro st = p9_client_stat(fid); 12446636b6dcSJianyong Wu p9_client_clunk(fid); 124590e4fc88SAl Viro if (IS_ERR(st)) 124690e4fc88SAl Viro return ERR_CAST(st); 124790e4fc88SAl Viro 124890e4fc88SAl Viro if (!(st->mode & P9_DMSYMLINK)) { 124990e4fc88SAl Viro p9stat_free(st); 125090e4fc88SAl Viro kfree(st); 125190e4fc88SAl Viro return ERR_PTR(-EINVAL); 12522bad8471SEric Van Hensbergen } 1253680baacbSAl Viro res = st->extension; 125490e4fc88SAl Viro st->extension = NULL; 1255680baacbSAl Viro if (strlen(res) >= PATH_MAX) 1256680baacbSAl Viro res[PATH_MAX - 1] = '\0'; 1257680baacbSAl Viro 125890e4fc88SAl Viro p9stat_free(st); 125990e4fc88SAl Viro kfree(st); 1260fceef393SAl Viro set_delayed_call(done, kfree_link, res); 1261fceef393SAl Viro return res; 12622bad8471SEric Van Hensbergen } 12632bad8471SEric Van Hensbergen 12642bad8471SEric Van Hensbergen /** 1265ee443996SEric Van Hensbergen * v9fs_vfs_mkspecial - create a special file 1266ee443996SEric Van Hensbergen * @dir: inode to create special file in 1267ee443996SEric Van Hensbergen * @dentry: dentry to create 1268fd2916bdSFabian Frederick * @perm: mode to create special file 1269ee443996SEric Van Hensbergen * @extension: 9p2000.u format extension string representing special file 1270ee443996SEric Van Hensbergen * 1271ee443996SEric Van Hensbergen */ 1272ee443996SEric Van Hensbergen 1273531b1094SLatchesar Ionkov static int v9fs_vfs_mkspecial(struct inode *dir, struct dentry *dentry, 1274c2837de7SAl Viro u32 perm, const char *extension) 1275531b1094SLatchesar Ionkov { 1276bd238fb4SLatchesar Ionkov struct p9_fid *fid; 1277d28c61f0SAneesh Kumar K.V struct v9fs_session_info *v9ses; 1278531b1094SLatchesar Ionkov 12796a3124a3SLatchesar Ionkov v9ses = v9fs_inode2v9ses(dir); 1280dd6102fbSSripathi Kodi if (!v9fs_proto_dotu(v9ses)) { 12815d385153SJoe Perches p9_debug(P9_DEBUG_ERROR, "not extended\n"); 12826a3124a3SLatchesar Ionkov return -EPERM; 1283531b1094SLatchesar Ionkov } 1284531b1094SLatchesar Ionkov 1285bd238fb4SLatchesar Ionkov fid = v9fs_create(v9ses, dir, dentry, (char *) extension, perm, 1286bd238fb4SLatchesar Ionkov P9_OREAD); 1287bd238fb4SLatchesar Ionkov if (IS_ERR(fid)) 1288bd238fb4SLatchesar Ionkov return PTR_ERR(fid); 1289da977b2cSEric Van Hensbergen 1290d28c61f0SAneesh Kumar K.V v9fs_invalidate_inode_attr(dir); 1291bd238fb4SLatchesar Ionkov p9_client_clunk(fid); 12926a3124a3SLatchesar Ionkov return 0; 1293531b1094SLatchesar Ionkov } 1294531b1094SLatchesar Ionkov 1295531b1094SLatchesar Ionkov /** 1296531b1094SLatchesar Ionkov * v9fs_vfs_symlink - helper function to create symlinks 1297bc868036SDavid Howells * @mnt_userns: The user namespace of the mount 1298531b1094SLatchesar Ionkov * @dir: directory inode containing symlink 1299531b1094SLatchesar Ionkov * @dentry: dentry for symlink 1300531b1094SLatchesar Ionkov * @symname: symlink data 1301531b1094SLatchesar Ionkov * 1302ee443996SEric Van Hensbergen * See Also: 9P2000.u RFC for more information 1303531b1094SLatchesar Ionkov * 1304531b1094SLatchesar Ionkov */ 1305531b1094SLatchesar Ionkov 1306531b1094SLatchesar Ionkov static int 1307549c7297SChristian Brauner v9fs_vfs_symlink(struct user_namespace *mnt_userns, struct inode *dir, 1308549c7297SChristian Brauner struct dentry *dentry, const char *symname) 1309531b1094SLatchesar Ionkov { 13104b8e9923SAl Viro p9_debug(P9_DEBUG_VFS, " %lu,%pd,%s\n", 13114b8e9923SAl Viro dir->i_ino, dentry, symname); 1312531b1094SLatchesar Ionkov 1313c2837de7SAl Viro return v9fs_vfs_mkspecial(dir, dentry, P9_DMSYMLINK, symname); 1314531b1094SLatchesar Ionkov } 1315531b1094SLatchesar Ionkov 1316b46c267eSAl Viro #define U32_MAX_DIGITS 10 1317b46c267eSAl Viro 13182bad8471SEric Van Hensbergen /** 13192bad8471SEric Van Hensbergen * v9fs_vfs_link - create a hardlink 13202bad8471SEric Van Hensbergen * @old_dentry: dentry for file to link to 13212bad8471SEric Van Hensbergen * @dir: inode destination for new link 132273c592b9SEric Van Hensbergen * @dentry: dentry for link 13232bad8471SEric Van Hensbergen * 13242bad8471SEric Van Hensbergen */ 13252bad8471SEric Van Hensbergen 13262bad8471SEric Van Hensbergen static int 13272bad8471SEric Van Hensbergen v9fs_vfs_link(struct dentry *old_dentry, struct inode *dir, 13282bad8471SEric Van Hensbergen struct dentry *dentry) 13292bad8471SEric Van Hensbergen { 1330531b1094SLatchesar Ionkov int retval; 1331b46c267eSAl Viro char name[1 + U32_MAX_DIGITS + 2]; /* sign + number + \n + \0 */ 1332d28c61f0SAneesh Kumar K.V struct p9_fid *oldfid; 13332bad8471SEric Van Hensbergen 13344b8e9923SAl Viro p9_debug(P9_DEBUG_VFS, " %lu,%pd,%pd\n", 13354b8e9923SAl Viro dir->i_ino, dentry, old_dentry); 13362bad8471SEric Van Hensbergen 1337da977b2cSEric Van Hensbergen oldfid = v9fs_fid_clone(old_dentry); 1338da977b2cSEric Van Hensbergen if (IS_ERR(oldfid)) 1339da977b2cSEric Van Hensbergen return PTR_ERR(oldfid); 13402bad8471SEric Van Hensbergen 134116cce6d2SLatchesar Ionkov sprintf(name, "%d\n", oldfid->fid); 1342bd238fb4SLatchesar Ionkov retval = v9fs_vfs_mkspecial(dir, dentry, P9_DMLINK, name); 1343c06c066aSAneesh Kumar K.V if (!retval) { 13442b0143b5SDavid Howells v9fs_refresh_inode(oldfid, d_inode(old_dentry)); 1345d28c61f0SAneesh Kumar K.V v9fs_invalidate_inode_attr(dir); 1346c06c066aSAneesh Kumar K.V } 1347bd238fb4SLatchesar Ionkov p9_client_clunk(oldfid); 13482bad8471SEric Van Hensbergen return retval; 13492bad8471SEric Van Hensbergen } 13502bad8471SEric Van Hensbergen 13512bad8471SEric Van Hensbergen /** 13522bad8471SEric Van Hensbergen * v9fs_vfs_mknod - create a special file 1353bc868036SDavid Howells * @mnt_userns: The user namespace of the mount 13542bad8471SEric Van Hensbergen * @dir: inode destination for new link 13552bad8471SEric Van Hensbergen * @dentry: dentry for file 13562bad8471SEric Van Hensbergen * @mode: mode for creation 1357ee443996SEric Van Hensbergen * @rdev: device associated with special file 13582bad8471SEric Van Hensbergen * 13592bad8471SEric Van Hensbergen */ 13602bad8471SEric Van Hensbergen 13612bad8471SEric Van Hensbergen static int 1362549c7297SChristian Brauner v9fs_vfs_mknod(struct user_namespace *mnt_userns, struct inode *dir, 1363549c7297SChristian Brauner struct dentry *dentry, umode_t mode, dev_t rdev) 13642bad8471SEric Van Hensbergen { 1365c2837de7SAl Viro struct v9fs_session_info *v9ses = v9fs_inode2v9ses(dir); 1366531b1094SLatchesar Ionkov int retval; 1367b46c267eSAl Viro char name[2 + U32_MAX_DIGITS + 1 + U32_MAX_DIGITS + 1]; 1368c2837de7SAl Viro u32 perm; 13692bad8471SEric Van Hensbergen 13704b8e9923SAl Viro p9_debug(P9_DEBUG_VFS, " %lu,%pd mode: %hx MAJOR: %u MINOR: %u\n", 13714b8e9923SAl Viro dir->i_ino, dentry, mode, 13725d385153SJoe Perches MAJOR(rdev), MINOR(rdev)); 13732bad8471SEric Van Hensbergen 13742bad8471SEric Van Hensbergen /* build extension */ 13752bad8471SEric Van Hensbergen if (S_ISBLK(mode)) 1376531b1094SLatchesar Ionkov sprintf(name, "b %u %u", MAJOR(rdev), MINOR(rdev)); 13772bad8471SEric Van Hensbergen else if (S_ISCHR(mode)) 1378531b1094SLatchesar Ionkov sprintf(name, "c %u %u", MAJOR(rdev), MINOR(rdev)); 1379b46c267eSAl Viro else 1380531b1094SLatchesar Ionkov *name = 0; 13812bad8471SEric Van Hensbergen 1382c2837de7SAl Viro perm = unixmode2p9mode(v9ses, mode); 1383c2837de7SAl Viro retval = v9fs_vfs_mkspecial(dir, dentry, perm, name); 13842bad8471SEric Van Hensbergen 13852bad8471SEric Van Hensbergen return retval; 13862bad8471SEric Van Hensbergen } 13872bad8471SEric Van Hensbergen 1388b3cbea03SAneesh Kumar K.V int v9fs_refresh_inode(struct p9_fid *fid, struct inode *inode) 1389b3cbea03SAneesh Kumar K.V { 139045089142SAneesh Kumar K.V int umode; 139145089142SAneesh Kumar K.V dev_t rdev; 1392b3cbea03SAneesh Kumar K.V struct p9_wstat *st; 1393b3cbea03SAneesh Kumar K.V struct v9fs_session_info *v9ses; 13945e3cc1eeSHou Tao unsigned int flags; 1395b3cbea03SAneesh Kumar K.V 1396b3cbea03SAneesh Kumar K.V v9ses = v9fs_inode2v9ses(inode); 1397b3cbea03SAneesh Kumar K.V st = p9_client_stat(fid); 1398b3cbea03SAneesh Kumar K.V if (IS_ERR(st)) 1399b3cbea03SAneesh Kumar K.V return PTR_ERR(st); 140045089142SAneesh Kumar K.V /* 140145089142SAneesh Kumar K.V * Don't update inode if the file type is different 140245089142SAneesh Kumar K.V */ 140345089142SAneesh Kumar K.V umode = p9mode2unixmode(v9ses, st, &rdev); 14046e3e2c43SAl Viro if (inode_wrong_type(inode, umode)) 140545089142SAneesh Kumar K.V goto out; 1406b3cbea03SAneesh Kumar K.V 1407b3cbea03SAneesh Kumar K.V /* 1408b3cbea03SAneesh Kumar K.V * We don't want to refresh inode->i_size, 1409b3cbea03SAneesh Kumar K.V * because we may have cached data 1410b3cbea03SAneesh Kumar K.V */ 14115e3cc1eeSHou Tao flags = (v9ses->cache == CACHE_LOOSE || v9ses->cache == CACHE_FSCACHE) ? 14125e3cc1eeSHou Tao V9FS_STAT2INODE_KEEP_ISIZE : 0; 14135e3cc1eeSHou Tao v9fs_stat2inode(st, inode, inode->i_sb, flags); 141445089142SAneesh Kumar K.V out: 1415b3cbea03SAneesh Kumar K.V p9stat_free(st); 1416b3cbea03SAneesh Kumar K.V kfree(st); 1417b3cbea03SAneesh Kumar K.V return 0; 1418b3cbea03SAneesh Kumar K.V } 1419b3cbea03SAneesh Kumar K.V 14209b6533c9SSripathi Kodi static const struct inode_operations v9fs_dir_inode_operations_dotu = { 14219b6533c9SSripathi Kodi .create = v9fs_vfs_create, 14229b6533c9SSripathi Kodi .lookup = v9fs_vfs_lookup, 1423e43ae79cSMiklos Szeredi .atomic_open = v9fs_vfs_atomic_open, 14249b6533c9SSripathi Kodi .symlink = v9fs_vfs_symlink, 142550cc42ffSVenkateswararao Jujjuri (JV) .link = v9fs_vfs_link, 14269b6533c9SSripathi Kodi .unlink = v9fs_vfs_unlink, 14279b6533c9SSripathi Kodi .mkdir = v9fs_vfs_mkdir, 14289b6533c9SSripathi Kodi .rmdir = v9fs_vfs_rmdir, 14291d76e313SAneesh Kumar K.V .mknod = v9fs_vfs_mknod, 14309b6533c9SSripathi Kodi .rename = v9fs_vfs_rename, 14319b6533c9SSripathi Kodi .getattr = v9fs_vfs_getattr, 14329b6533c9SSripathi Kodi .setattr = v9fs_vfs_setattr, 14339b6533c9SSripathi Kodi }; 14349b6533c9SSripathi Kodi 1435754661f1SArjan van de Ven static const struct inode_operations v9fs_dir_inode_operations = { 1436b501611aSEric Van Hensbergen .create = v9fs_vfs_create, 1437b501611aSEric Van Hensbergen .lookup = v9fs_vfs_lookup, 1438e43ae79cSMiklos Szeredi .atomic_open = v9fs_vfs_atomic_open, 1439b501611aSEric Van Hensbergen .unlink = v9fs_vfs_unlink, 1440b501611aSEric Van Hensbergen .mkdir = v9fs_vfs_mkdir, 1441b501611aSEric Van Hensbergen .rmdir = v9fs_vfs_rmdir, 1442b501611aSEric Van Hensbergen .mknod = v9fs_vfs_mknod, 1443b501611aSEric Van Hensbergen .rename = v9fs_vfs_rename, 1444b501611aSEric Van Hensbergen .getattr = v9fs_vfs_getattr, 1445b501611aSEric Van Hensbergen .setattr = v9fs_vfs_setattr, 1446b501611aSEric Van Hensbergen }; 1447b501611aSEric Van Hensbergen 1448754661f1SArjan van de Ven static const struct inode_operations v9fs_file_inode_operations = { 14492bad8471SEric Van Hensbergen .getattr = v9fs_vfs_getattr, 14502bad8471SEric Van Hensbergen .setattr = v9fs_vfs_setattr, 14512bad8471SEric Van Hensbergen }; 14522bad8471SEric Van Hensbergen 1453754661f1SArjan van de Ven static const struct inode_operations v9fs_symlink_inode_operations = { 14546b255391SAl Viro .get_link = v9fs_vfs_get_link, 14552bad8471SEric Van Hensbergen .getattr = v9fs_vfs_getattr, 14562bad8471SEric Van Hensbergen .setattr = v9fs_vfs_setattr, 14572bad8471SEric Van Hensbergen }; 14589b6533c9SSripathi Kodi 1459