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; 506e195b0fSDominique Martinet 512bad8471SEric Van Hensbergen res = mode & 0777; 522bad8471SEric Van Hensbergen if (S_ISDIR(mode)) 53bd238fb4SLatchesar Ionkov res |= P9_DMDIR; 54dd6102fbSSripathi Kodi if (v9fs_proto_dotu(v9ses)) { 552bad8471SEric Van Hensbergen if (v9ses->nodev == 0) { 562bad8471SEric Van Hensbergen if (S_ISSOCK(mode)) 57bd238fb4SLatchesar Ionkov res |= P9_DMSOCKET; 582bad8471SEric Van Hensbergen if (S_ISFIFO(mode)) 59bd238fb4SLatchesar Ionkov res |= P9_DMNAMEDPIPE; 602bad8471SEric Van Hensbergen if (S_ISBLK(mode)) 61bd238fb4SLatchesar Ionkov res |= P9_DMDEVICE; 622bad8471SEric Van Hensbergen if (S_ISCHR(mode)) 63bd238fb4SLatchesar Ionkov res |= P9_DMDEVICE; 642bad8471SEric Van Hensbergen } 652bad8471SEric Van Hensbergen 662bad8471SEric Van Hensbergen if ((mode & S_ISUID) == S_ISUID) 67bd238fb4SLatchesar Ionkov res |= P9_DMSETUID; 682bad8471SEric Van Hensbergen if ((mode & S_ISGID) == S_ISGID) 69bd238fb4SLatchesar Ionkov res |= P9_DMSETGID; 70d199d652SAnthony Liguori if ((mode & S_ISVTX) == S_ISVTX) 71d199d652SAnthony Liguori res |= P9_DMSETVTX; 722bad8471SEric Van Hensbergen } 732bad8471SEric Van Hensbergen return res; 742bad8471SEric Van Hensbergen } 752bad8471SEric Van Hensbergen 762bad8471SEric Van Hensbergen /** 77df345c67SAneesh Kumar K.V * p9mode2perm- convert plan9 mode bits to unix permission bits 78df345c67SAneesh Kumar K.V * @v9ses: v9fs session information 79df345c67SAneesh Kumar K.V * @stat: p9_wstat from which mode need to be derived 80df345c67SAneesh Kumar K.V * 81df345c67SAneesh Kumar K.V */ 82df345c67SAneesh Kumar K.V static int p9mode2perm(struct v9fs_session_info *v9ses, 83df345c67SAneesh Kumar K.V struct p9_wstat *stat) 84df345c67SAneesh Kumar K.V { 85df345c67SAneesh Kumar K.V int res; 86df345c67SAneesh Kumar K.V int mode = stat->mode; 87df345c67SAneesh Kumar K.V 88df345c67SAneesh Kumar K.V res = mode & S_IALLUGO; 89df345c67SAneesh Kumar K.V if (v9fs_proto_dotu(v9ses)) { 90df345c67SAneesh Kumar K.V if ((mode & P9_DMSETUID) == P9_DMSETUID) 91df345c67SAneesh Kumar K.V res |= S_ISUID; 92df345c67SAneesh Kumar K.V 93df345c67SAneesh Kumar K.V if ((mode & P9_DMSETGID) == P9_DMSETGID) 94df345c67SAneesh Kumar K.V res |= S_ISGID; 95df345c67SAneesh Kumar K.V 96df345c67SAneesh Kumar K.V if ((mode & P9_DMSETVTX) == P9_DMSETVTX) 97df345c67SAneesh Kumar K.V res |= S_ISVTX; 98df345c67SAneesh Kumar K.V } 99df345c67SAneesh Kumar K.V return res; 100df345c67SAneesh Kumar K.V } 101df345c67SAneesh Kumar K.V 102df345c67SAneesh Kumar K.V /** 1032bad8471SEric Van Hensbergen * p9mode2unixmode- convert plan9 mode bits to unix mode bits 1042bad8471SEric Van Hensbergen * @v9ses: v9fs session information 10545089142SAneesh Kumar K.V * @stat: p9_wstat from which mode need to be derived 10645089142SAneesh Kumar K.V * @rdev: major number, minor number in case of device files. 1072bad8471SEric Van Hensbergen * 1082bad8471SEric Van Hensbergen */ 1093eda0de6SAl Viro static umode_t p9mode2unixmode(struct v9fs_session_info *v9ses, 11045089142SAneesh Kumar K.V struct p9_wstat *stat, dev_t *rdev) 1112bad8471SEric Van Hensbergen { 11205f975cdSDominique Martinet int res, r; 1133eda0de6SAl Viro u32 mode = stat->mode; 1142bad8471SEric Van Hensbergen 11545089142SAneesh Kumar K.V *rdev = 0; 116df345c67SAneesh Kumar K.V res = p9mode2perm(v9ses, stat); 1172bad8471SEric Van Hensbergen 118bd238fb4SLatchesar Ionkov if ((mode & P9_DMDIR) == P9_DMDIR) 1192bad8471SEric Van Hensbergen res |= S_IFDIR; 120dd6102fbSSripathi Kodi else if ((mode & P9_DMSYMLINK) && (v9fs_proto_dotu(v9ses))) 1212bad8471SEric Van Hensbergen res |= S_IFLNK; 122dd6102fbSSripathi Kodi else if ((mode & P9_DMSOCKET) && (v9fs_proto_dotu(v9ses)) 1232bad8471SEric Van Hensbergen && (v9ses->nodev == 0)) 1242bad8471SEric Van Hensbergen res |= S_IFSOCK; 125dd6102fbSSripathi Kodi else if ((mode & P9_DMNAMEDPIPE) && (v9fs_proto_dotu(v9ses)) 1262bad8471SEric Van Hensbergen && (v9ses->nodev == 0)) 1272bad8471SEric Van Hensbergen res |= S_IFIFO; 128dd6102fbSSripathi Kodi else if ((mode & P9_DMDEVICE) && (v9fs_proto_dotu(v9ses)) 12945089142SAneesh Kumar K.V && (v9ses->nodev == 0)) { 13005f975cdSDominique Martinet char type = 0; 13145089142SAneesh Kumar K.V int major = -1, minor = -1; 13245089142SAneesh Kumar K.V 13305f975cdSDominique Martinet r = sscanf(stat->extension, "%c %i %i", &type, &major, &minor); 13405f975cdSDominique Martinet if (r != 3) { 13505f975cdSDominique Martinet p9_debug(P9_DEBUG_ERROR, 13605f975cdSDominique Martinet "invalid device string, umode will be bogus: %s\n", 13705f975cdSDominique Martinet stat->extension); 13805f975cdSDominique Martinet return res; 13905f975cdSDominique Martinet } 14045089142SAneesh Kumar K.V switch (type) { 14145089142SAneesh Kumar K.V case 'c': 14245089142SAneesh Kumar K.V res |= S_IFCHR; 14345089142SAneesh Kumar K.V break; 14445089142SAneesh Kumar K.V case 'b': 1452bad8471SEric Van Hensbergen res |= S_IFBLK; 14645089142SAneesh Kumar K.V break; 14745089142SAneesh Kumar K.V default: 1485d385153SJoe Perches p9_debug(P9_DEBUG_ERROR, "Unknown special type %c %s\n", 1495d385153SJoe Perches type, stat->extension); 15051958817Szhengbin } 15145089142SAneesh Kumar K.V *rdev = MKDEV(major, minor); 15245089142SAneesh Kumar K.V } else 1532bad8471SEric Van Hensbergen res |= S_IFREG; 1542bad8471SEric Van Hensbergen 1552bad8471SEric Van Hensbergen return res; 1562bad8471SEric Van Hensbergen } 1572bad8471SEric Van Hensbergen 158ee443996SEric Van Hensbergen /** 159ee443996SEric Van Hensbergen * v9fs_uflags2omode- convert posix open flags to plan 9 mode bits 160ee443996SEric Van Hensbergen * @uflags: flags to convert 1612e4bef41SEric Van Hensbergen * @extended: if .u extensions are active 162ee443996SEric Van Hensbergen */ 163ee443996SEric Van Hensbergen 1642e4bef41SEric Van Hensbergen int v9fs_uflags2omode(int uflags, int extended) 1656a3124a3SLatchesar Ionkov { 1666a3124a3SLatchesar Ionkov int ret; 1676a3124a3SLatchesar Ionkov 1686a3124a3SLatchesar Ionkov ret = 0; 1696a3124a3SLatchesar Ionkov switch (uflags&3) { 1706a3124a3SLatchesar Ionkov default: 1716a3124a3SLatchesar Ionkov case O_RDONLY: 172bd238fb4SLatchesar Ionkov ret = P9_OREAD; 1736a3124a3SLatchesar Ionkov break; 1746a3124a3SLatchesar Ionkov 1756a3124a3SLatchesar Ionkov case O_WRONLY: 176bd238fb4SLatchesar Ionkov ret = P9_OWRITE; 1776a3124a3SLatchesar Ionkov break; 1786a3124a3SLatchesar Ionkov 1796a3124a3SLatchesar Ionkov case O_RDWR: 180bd238fb4SLatchesar Ionkov ret = P9_ORDWR; 1816a3124a3SLatchesar Ionkov break; 1826a3124a3SLatchesar Ionkov } 1836a3124a3SLatchesar Ionkov 1842e4bef41SEric Van Hensbergen if (extended) { 1852e4bef41SEric Van Hensbergen if (uflags & O_EXCL) 1862e4bef41SEric Van Hensbergen ret |= P9_OEXCL; 1872e4bef41SEric Van Hensbergen 1886a3124a3SLatchesar Ionkov if (uflags & O_APPEND) 189bd238fb4SLatchesar Ionkov ret |= P9_OAPPEND; 1902e4bef41SEric Van Hensbergen } 1916a3124a3SLatchesar Ionkov 1926a3124a3SLatchesar Ionkov return ret; 1936a3124a3SLatchesar Ionkov } 1946a3124a3SLatchesar Ionkov 1952bad8471SEric Van Hensbergen /** 196531b1094SLatchesar Ionkov * v9fs_blank_wstat - helper function to setup a 9P stat structure 197531b1094SLatchesar Ionkov * @wstat: structure to initialize 1982bad8471SEric Van Hensbergen * 1992bad8471SEric Van Hensbergen */ 2002bad8471SEric Van Hensbergen 2017a4439c4SM. Mohan Kumar void 202bd238fb4SLatchesar Ionkov v9fs_blank_wstat(struct p9_wstat *wstat) 2032bad8471SEric Van Hensbergen { 204531b1094SLatchesar Ionkov wstat->type = ~0; 205531b1094SLatchesar Ionkov wstat->dev = ~0; 206531b1094SLatchesar Ionkov wstat->qid.type = ~0; 207531b1094SLatchesar Ionkov wstat->qid.version = ~0; 208531b1094SLatchesar Ionkov *((long long *)&wstat->qid.path) = ~0; 209531b1094SLatchesar Ionkov wstat->mode = ~0; 210531b1094SLatchesar Ionkov wstat->atime = ~0; 211531b1094SLatchesar Ionkov wstat->mtime = ~0; 212531b1094SLatchesar Ionkov wstat->length = ~0; 213531b1094SLatchesar Ionkov wstat->name = NULL; 214531b1094SLatchesar Ionkov wstat->uid = NULL; 215531b1094SLatchesar Ionkov wstat->gid = NULL; 216531b1094SLatchesar Ionkov wstat->muid = NULL; 217447c5094SEric W. Biederman wstat->n_uid = INVALID_UID; 218447c5094SEric W. Biederman wstat->n_gid = INVALID_GID; 219447c5094SEric W. Biederman wstat->n_muid = INVALID_UID; 220531b1094SLatchesar Ionkov wstat->extension = NULL; 2212bad8471SEric Van Hensbergen } 2222bad8471SEric Van Hensbergen 22360e78d2cSAbhishek Kulkarni /** 22460e78d2cSAbhishek Kulkarni * v9fs_alloc_inode - helper function to allocate an inode 225bc868036SDavid Howells * @sb: The superblock to allocate the inode from 22660e78d2cSAbhishek Kulkarni */ 22760e78d2cSAbhishek Kulkarni struct inode *v9fs_alloc_inode(struct super_block *sb) 22860e78d2cSAbhishek Kulkarni { 229a78ce05dSAneesh Kumar K.V struct v9fs_inode *v9inode; 2306e195b0fSDominique Martinet 231fd60b288SMuchun Song v9inode = alloc_inode_sb(sb, v9fs_inode_cache, GFP_KERNEL); 232a78ce05dSAneesh Kumar K.V if (!v9inode) 23360e78d2cSAbhishek Kulkarni return NULL; 2346b39f6d2SAneesh Kumar K.V v9inode->writeback_fid = NULL; 235b3cbea03SAneesh Kumar K.V v9inode->cache_validity = 0; 2365a7e0a8cSAneesh Kumar K.V mutex_init(&v9inode->v_mutex); 237874c8ca1SDavid Howells return &v9inode->netfs.inode; 23860e78d2cSAbhishek Kulkarni } 23960e78d2cSAbhishek Kulkarni 24060e78d2cSAbhishek Kulkarni /** 2415e8a0770SAl Viro * v9fs_free_inode - destroy an inode 242bc868036SDavid Howells * @inode: The inode to be freed 24360e78d2cSAbhishek Kulkarni */ 24460e78d2cSAbhishek Kulkarni 2455e8a0770SAl Viro void v9fs_free_inode(struct inode *inode) 246fa0d7e3dSNick Piggin { 247a78ce05dSAneesh Kumar K.V kmem_cache_free(v9fs_inode_cache, V9FS_I(inode)); 248fa0d7e3dSNick Piggin } 249fa0d7e3dSNick Piggin 250bc899ee1SDavid Howells /* 251bc899ee1SDavid Howells * Set parameters for the netfs library 252bc899ee1SDavid Howells */ 253bc899ee1SDavid Howells static void v9fs_set_netfs_context(struct inode *inode) 254bc899ee1SDavid Howells { 255e81fb419SLinus Torvalds struct v9fs_inode *v9inode = V9FS_I(inode); 256e81fb419SLinus Torvalds netfs_inode_init(&v9inode->netfs, &v9fs_req_ops); 257bc899ee1SDavid Howells } 258bc899ee1SDavid Howells 2595ffc0cb3SAneesh Kumar K.V int v9fs_init_inode(struct v9fs_session_info *v9ses, 2603eda0de6SAl Viro struct inode *inode, umode_t mode, dev_t rdev) 2612bad8471SEric Van Hensbergen { 2625ffc0cb3SAneesh Kumar K.V int err = 0; 2632bb54115SAbhishek Kulkarni 26421cb47beSChristian Brauner inode_init_owner(&init_user_ns, inode, NULL, mode); 2652bad8471SEric Van Hensbergen inode->i_blocks = 0; 26645089142SAneesh Kumar K.V inode->i_rdev = rdev; 267078cd827SDeepa Dinamani inode->i_atime = inode->i_mtime = inode->i_ctime = current_time(inode); 268147b31cfSEric Van Hensbergen inode->i_mapping->a_ops = &v9fs_addr_operations; 269987a6485SGreg Kurz inode->i_private = NULL; 2702bad8471SEric Van Hensbergen 2712bad8471SEric Van Hensbergen switch (mode & S_IFMT) { 2722bad8471SEric Van Hensbergen case S_IFIFO: 2732bad8471SEric Van Hensbergen case S_IFBLK: 2742bad8471SEric Van Hensbergen case S_IFCHR: 2752bad8471SEric Van Hensbergen case S_IFSOCK: 2764b43516aSM. Mohan Kumar if (v9fs_proto_dotl(v9ses)) { 2774b43516aSM. Mohan Kumar inode->i_op = &v9fs_file_inode_operations_dotl; 2784b43516aSM. Mohan Kumar } else if (v9fs_proto_dotu(v9ses)) { 2794b43516aSM. Mohan Kumar inode->i_op = &v9fs_file_inode_operations; 2804b43516aSM. Mohan Kumar } else { 2815d385153SJoe Perches p9_debug(P9_DEBUG_ERROR, 282bd238fb4SLatchesar Ionkov "special files without extended mode\n"); 2832bb54115SAbhishek Kulkarni err = -EINVAL; 2842bb54115SAbhishek Kulkarni goto error; 285b501611aSEric Van Hensbergen } 2862bb54115SAbhishek Kulkarni init_special_inode(inode, inode->i_mode, inode->i_rdev); 2875d58bec5SEric Van Hensbergen break; 2882bad8471SEric Van Hensbergen case S_IFREG: 2899b6533c9SSripathi Kodi if (v9fs_proto_dotl(v9ses)) { 2909b6533c9SSripathi Kodi inode->i_op = &v9fs_file_inode_operations_dotl; 291fb89b45cSDominique Martinet if (v9ses->cache == CACHE_LOOSE || 292fb89b45cSDominique Martinet v9ses->cache == CACHE_FSCACHE) 29329236f4eSAneesh Kumar K.V inode->i_fop = 29429236f4eSAneesh Kumar K.V &v9fs_cached_file_operations_dotl; 295fb89b45cSDominique Martinet else if (v9ses->cache == CACHE_MMAP) 296fb89b45cSDominique Martinet inode->i_fop = &v9fs_mmap_file_operations_dotl; 29729236f4eSAneesh Kumar K.V else 2989b6533c9SSripathi Kodi inode->i_fop = &v9fs_file_operations_dotl; 2999b6533c9SSripathi Kodi } else { 3002bad8471SEric Van Hensbergen inode->i_op = &v9fs_file_inode_operations; 301fb89b45cSDominique Martinet if (v9ses->cache == CACHE_LOOSE || 302fb89b45cSDominique Martinet v9ses->cache == CACHE_FSCACHE) 303fb89b45cSDominique Martinet inode->i_fop = 304fb89b45cSDominique Martinet &v9fs_cached_file_operations; 305fb89b45cSDominique Martinet else if (v9ses->cache == CACHE_MMAP) 306fb89b45cSDominique Martinet inode->i_fop = &v9fs_mmap_file_operations; 30729236f4eSAneesh Kumar K.V else 3082bad8471SEric Van Hensbergen inode->i_fop = &v9fs_file_operations; 3099b6533c9SSripathi Kodi } 3109b6533c9SSripathi Kodi 3112bad8471SEric Van Hensbergen break; 312b501611aSEric Van Hensbergen case S_IFLNK: 3139b6533c9SSripathi Kodi if (!v9fs_proto_dotu(v9ses) && !v9fs_proto_dotl(v9ses)) { 3145d385153SJoe Perches p9_debug(P9_DEBUG_ERROR, 3155d385153SJoe Perches "extended modes used with legacy protocol\n"); 3162bb54115SAbhishek Kulkarni err = -EINVAL; 3172bb54115SAbhishek Kulkarni goto error; 318b501611aSEric Van Hensbergen } 3199b6533c9SSripathi Kodi 3209b6533c9SSripathi Kodi if (v9fs_proto_dotl(v9ses)) 3219b6533c9SSripathi Kodi inode->i_op = &v9fs_symlink_inode_operations_dotl; 3229b6533c9SSripathi Kodi else 323b501611aSEric Van Hensbergen inode->i_op = &v9fs_symlink_inode_operations; 3249b6533c9SSripathi Kodi 325b501611aSEric Van Hensbergen break; 3262bad8471SEric Van Hensbergen case S_IFDIR: 327d8c76e6fSDave Hansen inc_nlink(inode); 3289b6533c9SSripathi Kodi if (v9fs_proto_dotl(v9ses)) 3299b6533c9SSripathi Kodi inode->i_op = &v9fs_dir_inode_operations_dotl; 3309b6533c9SSripathi Kodi else if (v9fs_proto_dotu(v9ses)) 3319b6533c9SSripathi Kodi inode->i_op = &v9fs_dir_inode_operations_dotu; 332b501611aSEric Van Hensbergen else 3332bad8471SEric Van Hensbergen inode->i_op = &v9fs_dir_inode_operations; 3349b6533c9SSripathi Kodi 3359b6533c9SSripathi Kodi if (v9fs_proto_dotl(v9ses)) 3369b6533c9SSripathi Kodi inode->i_fop = &v9fs_dir_operations_dotl; 3379b6533c9SSripathi Kodi else 3382bad8471SEric Van Hensbergen inode->i_fop = &v9fs_dir_operations; 3399b6533c9SSripathi Kodi 3402bad8471SEric Van Hensbergen break; 3412bad8471SEric Van Hensbergen default: 342609eac1cSLinus Torvalds p9_debug(P9_DEBUG_ERROR, "BAD mode 0x%hx S_IFMT 0x%x\n", 3432bad8471SEric Van Hensbergen mode, mode & S_IFMT); 3442bb54115SAbhishek Kulkarni err = -EINVAL; 3452bb54115SAbhishek Kulkarni goto error; 3462bad8471SEric Van Hensbergen } 347bc899ee1SDavid Howells 348bc899ee1SDavid Howells v9fs_set_netfs_context(inode); 3492bb54115SAbhishek Kulkarni error: 3505ffc0cb3SAneesh Kumar K.V return err; 3515ffc0cb3SAneesh Kumar K.V 3525ffc0cb3SAneesh Kumar K.V } 3535ffc0cb3SAneesh Kumar K.V 3545ffc0cb3SAneesh Kumar K.V /** 3555ffc0cb3SAneesh Kumar K.V * v9fs_get_inode - helper function to setup an inode 3565ffc0cb3SAneesh Kumar K.V * @sb: superblock 3575ffc0cb3SAneesh Kumar K.V * @mode: mode to setup inode with 358bc868036SDavid Howells * @rdev: The device numbers to set 3595ffc0cb3SAneesh Kumar K.V */ 3605ffc0cb3SAneesh Kumar K.V 3613eda0de6SAl Viro struct inode *v9fs_get_inode(struct super_block *sb, umode_t mode, dev_t rdev) 3625ffc0cb3SAneesh Kumar K.V { 3635ffc0cb3SAneesh Kumar K.V int err; 3645ffc0cb3SAneesh Kumar K.V struct inode *inode; 3655ffc0cb3SAneesh Kumar K.V struct v9fs_session_info *v9ses = sb->s_fs_info; 3665ffc0cb3SAneesh Kumar K.V 367609eac1cSLinus Torvalds p9_debug(P9_DEBUG_VFS, "super block: %p mode: %ho\n", sb, mode); 3685ffc0cb3SAneesh Kumar K.V 3695ffc0cb3SAneesh Kumar K.V inode = new_inode(sb); 3705ffc0cb3SAneesh Kumar K.V if (!inode) { 3715d385153SJoe Perches pr_warn("%s (%d): Problem allocating inode\n", 3725d385153SJoe Perches __func__, task_pid_nr(current)); 3735ffc0cb3SAneesh Kumar K.V return ERR_PTR(-ENOMEM); 3745ffc0cb3SAneesh Kumar K.V } 37545089142SAneesh Kumar K.V err = v9fs_init_inode(v9ses, inode, mode, rdev); 3765ffc0cb3SAneesh Kumar K.V if (err) { 3772bb54115SAbhishek Kulkarni iput(inode); 3782bb54115SAbhishek Kulkarni return ERR_PTR(err); 3792bad8471SEric Van Hensbergen } 3805ffc0cb3SAneesh Kumar K.V return inode; 3815ffc0cb3SAneesh Kumar K.V } 3822bad8471SEric Van Hensbergen 38360e78d2cSAbhishek Kulkarni /** 384bc868036SDavid Howells * v9fs_evict_inode - Remove an inode from the inode cache 38560e78d2cSAbhishek Kulkarni * @inode: inode to release 38660e78d2cSAbhishek Kulkarni * 38760e78d2cSAbhishek Kulkarni */ 388b57922d9SAl Viro void v9fs_evict_inode(struct inode *inode) 38960e78d2cSAbhishek Kulkarni { 3906b39f6d2SAneesh Kumar K.V struct v9fs_inode *v9inode = V9FS_I(inode); 39193c84614SDavid Howells __le32 version; 3926b39f6d2SAneesh Kumar K.V 3934ad78628SAl Viro truncate_inode_pages_final(&inode->i_data); 39493c84614SDavid Howells version = cpu_to_le32(v9inode->qid.version); 39593c84614SDavid Howells fscache_clear_inode_writeback(v9fs_inode_cookie(v9inode), inode, 39693c84614SDavid Howells &version); 397dbd5768fSJan Kara clear_inode(inode); 3984ad78628SAl Viro filemap_fdatawrite(&inode->i_data); 39960e78d2cSAbhishek Kulkarni 40024e42e32SDavid Howells fscache_relinquish_cookie(v9fs_inode_cookie(v9inode), false); 4016b39f6d2SAneesh Kumar K.V /* clunk the fid stashed in writeback_fid */ 402b48dbb99SDominique Martinet p9_fid_put(v9inode->writeback_fid); 4036b39f6d2SAneesh Kumar K.V v9inode->writeback_fid = NULL; 4043cf387d7SAneesh Kumar K.V } 40560e78d2cSAbhishek Kulkarni 406fd2421f5SAneesh Kumar K.V static int v9fs_test_inode(struct inode *inode, void *data) 407fd2421f5SAneesh Kumar K.V { 408fd2421f5SAneesh Kumar K.V int umode; 40945089142SAneesh Kumar K.V dev_t rdev; 410fd2421f5SAneesh Kumar K.V struct v9fs_inode *v9inode = V9FS_I(inode); 411fd2421f5SAneesh Kumar K.V struct p9_wstat *st = (struct p9_wstat *)data; 412fd2421f5SAneesh Kumar K.V struct v9fs_session_info *v9ses = v9fs_inode2v9ses(inode); 413fd2421f5SAneesh Kumar K.V 41445089142SAneesh Kumar K.V umode = p9mode2unixmode(v9ses, st, &rdev); 415fd2421f5SAneesh Kumar K.V /* don't match inode of different type */ 4166e3e2c43SAl Viro if (inode_wrong_type(inode, umode)) 417fd2421f5SAneesh Kumar K.V return 0; 418fd2421f5SAneesh Kumar K.V 419fd2421f5SAneesh Kumar K.V /* compare qid details */ 420fd2421f5SAneesh Kumar K.V if (memcmp(&v9inode->qid.version, 421fd2421f5SAneesh Kumar K.V &st->qid.version, sizeof(v9inode->qid.version))) 422fd2421f5SAneesh Kumar K.V return 0; 423fd2421f5SAneesh Kumar K.V 424fd2421f5SAneesh Kumar K.V if (v9inode->qid.type != st->qid.type) 425fd2421f5SAneesh Kumar K.V return 0; 4268ee03163STuomas Tynkkynen 4278ee03163STuomas Tynkkynen if (v9inode->qid.path != st->qid.path) 4288ee03163STuomas Tynkkynen return 0; 429fd2421f5SAneesh Kumar K.V return 1; 430fd2421f5SAneesh Kumar K.V } 431fd2421f5SAneesh Kumar K.V 432ed80fcfaSAneesh Kumar K.V static int v9fs_test_new_inode(struct inode *inode, void *data) 433ed80fcfaSAneesh Kumar K.V { 434ed80fcfaSAneesh Kumar K.V return 0; 435ed80fcfaSAneesh Kumar K.V } 436ed80fcfaSAneesh Kumar K.V 437fd2421f5SAneesh Kumar K.V static int v9fs_set_inode(struct inode *inode, void *data) 438fd2421f5SAneesh Kumar K.V { 439fd2421f5SAneesh Kumar K.V struct v9fs_inode *v9inode = V9FS_I(inode); 440fd2421f5SAneesh Kumar K.V struct p9_wstat *st = (struct p9_wstat *)data; 441fd2421f5SAneesh Kumar K.V 442fd2421f5SAneesh Kumar K.V memcpy(&v9inode->qid, &st->qid, sizeof(st->qid)); 443fd2421f5SAneesh Kumar K.V return 0; 444fd2421f5SAneesh Kumar K.V } 445fd2421f5SAneesh Kumar K.V 4465ffc0cb3SAneesh Kumar K.V static struct inode *v9fs_qid_iget(struct super_block *sb, 4475ffc0cb3SAneesh Kumar K.V struct p9_qid *qid, 448ed80fcfaSAneesh Kumar K.V struct p9_wstat *st, 449ed80fcfaSAneesh Kumar K.V int new) 4505ffc0cb3SAneesh Kumar K.V { 45145089142SAneesh Kumar K.V dev_t rdev; 4523eda0de6SAl Viro int retval; 4533eda0de6SAl Viro umode_t umode; 4545ffc0cb3SAneesh Kumar K.V unsigned long i_ino; 4555ffc0cb3SAneesh Kumar K.V struct inode *inode; 4565ffc0cb3SAneesh Kumar K.V struct v9fs_session_info *v9ses = sb->s_fs_info; 4576e195b0fSDominique Martinet int (*test)(struct inode *inode, void *data); 458ed80fcfaSAneesh Kumar K.V 459ed80fcfaSAneesh Kumar K.V if (new) 460ed80fcfaSAneesh Kumar K.V test = v9fs_test_new_inode; 461ed80fcfaSAneesh Kumar K.V else 462ed80fcfaSAneesh Kumar K.V test = v9fs_test_inode; 4635ffc0cb3SAneesh Kumar K.V 4645ffc0cb3SAneesh Kumar K.V i_ino = v9fs_qid2ino(qid); 465ed80fcfaSAneesh Kumar K.V inode = iget5_locked(sb, i_ino, test, v9fs_set_inode, st); 4665ffc0cb3SAneesh Kumar K.V if (!inode) 4675ffc0cb3SAneesh Kumar K.V return ERR_PTR(-ENOMEM); 4685ffc0cb3SAneesh Kumar K.V if (!(inode->i_state & I_NEW)) 4695ffc0cb3SAneesh Kumar K.V return inode; 4705ffc0cb3SAneesh Kumar K.V /* 4715ffc0cb3SAneesh Kumar K.V * initialize the inode with the stat info 4725ffc0cb3SAneesh Kumar K.V * FIXME!! we may need support for stale inodes 4735ffc0cb3SAneesh Kumar K.V * later. 4745ffc0cb3SAneesh Kumar K.V */ 475fd2421f5SAneesh Kumar K.V inode->i_ino = i_ino; 47645089142SAneesh Kumar K.V umode = p9mode2unixmode(v9ses, st, &rdev); 47745089142SAneesh Kumar K.V retval = v9fs_init_inode(v9ses, inode, umode, rdev); 4785ffc0cb3SAneesh Kumar K.V if (retval) 4795ffc0cb3SAneesh Kumar K.V goto error; 4805ffc0cb3SAneesh Kumar K.V 4815e3cc1eeSHou Tao v9fs_stat2inode(st, inode, sb, 0); 4825ffc0cb3SAneesh Kumar K.V v9fs_cache_inode_get_cookie(inode); 4835ffc0cb3SAneesh Kumar K.V unlock_new_inode(inode); 4845ffc0cb3SAneesh Kumar K.V return inode; 4855ffc0cb3SAneesh Kumar K.V error: 4860a73d0a2SAl Viro iget_failed(inode); 4875ffc0cb3SAneesh Kumar K.V return ERR_PTR(retval); 4885ffc0cb3SAneesh Kumar K.V 4895ffc0cb3SAneesh Kumar K.V } 4905ffc0cb3SAneesh Kumar K.V 49153c06f4eSAneesh Kumar K.V struct inode * 492a78ce05dSAneesh Kumar K.V v9fs_inode_from_fid(struct v9fs_session_info *v9ses, struct p9_fid *fid, 493ed80fcfaSAneesh Kumar K.V struct super_block *sb, int new) 4946a3124a3SLatchesar Ionkov { 49551a87c55SEric Van Hensbergen struct p9_wstat *st; 4965ffc0cb3SAneesh Kumar K.V struct inode *inode = NULL; 4976a3124a3SLatchesar Ionkov 498bd238fb4SLatchesar Ionkov st = p9_client_stat(fid); 49902bc3567SAbhishek Kulkarni if (IS_ERR(st)) 50002bc3567SAbhishek Kulkarni return ERR_CAST(st); 5012bad8471SEric Van Hensbergen 502ed80fcfaSAneesh Kumar K.V inode = v9fs_qid_iget(sb, &st->qid, st, new); 50302bc3567SAbhishek Kulkarni p9stat_free(st); 504bd238fb4SLatchesar Ionkov kfree(st); 5055ffc0cb3SAneesh Kumar K.V return inode; 5062bad8471SEric Van Hensbergen } 5072bad8471SEric Van Hensbergen 5082bad8471SEric Van Hensbergen /** 509f88657ceSAneesh Kumar K.V * v9fs_at_to_dotl_flags- convert Linux specific AT flags to 510f88657ceSAneesh Kumar K.V * plan 9 AT flag. 511f88657ceSAneesh Kumar K.V * @flags: flags to convert 512f88657ceSAneesh Kumar K.V */ 513f88657ceSAneesh Kumar K.V static int v9fs_at_to_dotl_flags(int flags) 514f88657ceSAneesh Kumar K.V { 515f88657ceSAneesh Kumar K.V int rflags = 0; 5166e195b0fSDominique Martinet 517f88657ceSAneesh Kumar K.V if (flags & AT_REMOVEDIR) 518f88657ceSAneesh Kumar K.V rflags |= P9_DOTL_AT_REMOVEDIR; 5196e195b0fSDominique Martinet 520f88657ceSAneesh Kumar K.V return rflags; 521f88657ceSAneesh Kumar K.V } 522f88657ceSAneesh Kumar K.V 523f88657ceSAneesh Kumar K.V /** 524ac89b2efSEryu Guan * v9fs_dec_count - helper functon to drop i_nlink. 525ac89b2efSEryu Guan * 526ac89b2efSEryu Guan * If a directory had nlink <= 2 (including . and ..), then we should not drop 527ac89b2efSEryu Guan * the link count, which indicates the underlying exported fs doesn't maintain 528ac89b2efSEryu Guan * nlink accurately. e.g. 529ac89b2efSEryu Guan * - overlayfs sets nlink to 1 for merged dir 530ac89b2efSEryu Guan * - ext4 (with dir_nlink feature enabled) sets nlink to 1 if a dir has more 531ac89b2efSEryu Guan * than EXT4_LINK_MAX (65000) links. 532ac89b2efSEryu Guan * 533ac89b2efSEryu Guan * @inode: inode whose nlink is being dropped 534ac89b2efSEryu Guan */ 535ac89b2efSEryu Guan static void v9fs_dec_count(struct inode *inode) 536ac89b2efSEryu Guan { 537ac89b2efSEryu Guan if (!S_ISDIR(inode->i_mode) || inode->i_nlink > 2) 538ac89b2efSEryu Guan drop_nlink(inode); 539ac89b2efSEryu Guan } 540ac89b2efSEryu Guan 541ac89b2efSEryu Guan /** 5422bad8471SEric Van Hensbergen * v9fs_remove - helper function to remove files and directories 54373c592b9SEric Van Hensbergen * @dir: directory inode that is being deleted 54448e370ffSAneesh Kumar K.V * @dentry: dentry that is being deleted 545fd2916bdSFabian Frederick * @flags: removing a directory 5462bad8471SEric Van Hensbergen * 5472bad8471SEric Van Hensbergen */ 5482bad8471SEric Van Hensbergen 54948e370ffSAneesh Kumar K.V static int v9fs_remove(struct inode *dir, struct dentry *dentry, int flags) 5502bad8471SEric Van Hensbergen { 55148e370ffSAneesh Kumar K.V struct inode *inode; 55248e370ffSAneesh Kumar K.V int retval = -EOPNOTSUPP; 55348e370ffSAneesh Kumar K.V struct p9_fid *v9fid, *dfid; 55448e370ffSAneesh Kumar K.V struct v9fs_session_info *v9ses; 5552bad8471SEric Van Hensbergen 5565d385153SJoe Perches p9_debug(P9_DEBUG_VFS, "inode: %p dentry: %p rmdir: %x\n", 55748e370ffSAneesh Kumar K.V dir, dentry, flags); 5582bad8471SEric Van Hensbergen 55948e370ffSAneesh Kumar K.V v9ses = v9fs_inode2v9ses(dir); 5602b0143b5SDavid Howells inode = d_inode(dentry); 56177d5a6b7SAl Viro dfid = v9fs_parent_fid(dentry); 56248e370ffSAneesh Kumar K.V if (IS_ERR(dfid)) { 56348e370ffSAneesh Kumar K.V retval = PTR_ERR(dfid); 5645d385153SJoe Perches p9_debug(P9_DEBUG_VFS, "fid lookup failed %d\n", retval); 56548e370ffSAneesh Kumar K.V return retval; 56648e370ffSAneesh Kumar K.V } 56748e370ffSAneesh Kumar K.V if (v9fs_proto_dotl(v9ses)) 568f88657ceSAneesh Kumar K.V retval = p9_client_unlinkat(dfid, dentry->d_name.name, 569f88657ceSAneesh Kumar K.V v9fs_at_to_dotl_flags(flags)); 570b48dbb99SDominique Martinet p9_fid_put(dfid); 57148e370ffSAneesh Kumar K.V if (retval == -EOPNOTSUPP) { 57248e370ffSAneesh Kumar K.V /* Try the one based on path */ 57348e370ffSAneesh Kumar K.V v9fid = v9fs_fid_clone(dentry); 574da977b2cSEric Van Hensbergen if (IS_ERR(v9fid)) 575da977b2cSEric Van Hensbergen return PTR_ERR(v9fid); 576d994f405SAneesh Kumar K.V retval = p9_client_remove(v9fid); 57748e370ffSAneesh Kumar K.V } 578b271ec47SAneesh Kumar K.V if (!retval) { 579b271ec47SAneesh Kumar K.V /* 580b271ec47SAneesh Kumar K.V * directories on unlink should have zero 581b271ec47SAneesh Kumar K.V * link count 582b271ec47SAneesh Kumar K.V */ 58348e370ffSAneesh Kumar K.V if (flags & AT_REMOVEDIR) { 58448e370ffSAneesh Kumar K.V clear_nlink(inode); 585ac89b2efSEryu Guan v9fs_dec_count(dir); 586b271ec47SAneesh Kumar K.V } else 587ac89b2efSEryu Guan v9fs_dec_count(inode); 588d28c61f0SAneesh Kumar K.V 58948e370ffSAneesh Kumar K.V v9fs_invalidate_inode_attr(inode); 590d28c61f0SAneesh Kumar K.V v9fs_invalidate_inode_attr(dir); 591154372e6SEric Van Hensbergen 592154372e6SEric Van Hensbergen /* invalidate all fids associated with dentry */ 593154372e6SEric Van Hensbergen /* NOTE: This will not include open fids */ 594154372e6SEric Van Hensbergen dentry->d_op->d_release(dentry); 595b271ec47SAneesh Kumar K.V } 596d994f405SAneesh Kumar K.V return retval; 5972bad8471SEric Van Hensbergen } 5982bad8471SEric Van Hensbergen 599bd238fb4SLatchesar Ionkov /** 600bd238fb4SLatchesar Ionkov * v9fs_create - Create a file 601ee443996SEric Van Hensbergen * @v9ses: session information 602ee443996SEric Van Hensbergen * @dir: directory that dentry is being created in 603bd238fb4SLatchesar Ionkov * @dentry: dentry that is being created 6040e15597eSAbhishek Kulkarni * @extension: 9p2000.u extension string to support devices, etc. 605bd238fb4SLatchesar Ionkov * @perm: create permissions 606bd238fb4SLatchesar Ionkov * @mode: open mode 607bd238fb4SLatchesar Ionkov * 608bd238fb4SLatchesar Ionkov */ 609bd238fb4SLatchesar Ionkov static struct p9_fid * 610bd238fb4SLatchesar Ionkov v9fs_create(struct v9fs_session_info *v9ses, struct inode *dir, 611bd238fb4SLatchesar Ionkov struct dentry *dentry, char *extension, u32 perm, u8 mode) 612bd238fb4SLatchesar Ionkov { 613bd238fb4SLatchesar Ionkov int err; 6147880b43bSAl Viro const unsigned char *name; 6156636b6dcSJianyong Wu struct p9_fid *dfid, *ofid = NULL, *fid = NULL; 616bd238fb4SLatchesar Ionkov struct inode *inode; 617bd238fb4SLatchesar Ionkov 6184b8e9923SAl Viro p9_debug(P9_DEBUG_VFS, "name %pd\n", dentry); 61951a87c55SEric Van Hensbergen 620bd238fb4SLatchesar Ionkov err = 0; 6217880b43bSAl Viro name = dentry->d_name.name; 62277d5a6b7SAl Viro dfid = v9fs_parent_fid(dentry); 623bd238fb4SLatchesar Ionkov if (IS_ERR(dfid)) { 624bd238fb4SLatchesar Ionkov err = PTR_ERR(dfid); 6255d385153SJoe Perches p9_debug(P9_DEBUG_VFS, "fid lookup failed %d\n", err); 6266d27e64dSVenkateswararao Jujjuri return ERR_PTR(err); 627bd238fb4SLatchesar Ionkov } 628bd238fb4SLatchesar Ionkov 629bd238fb4SLatchesar Ionkov /* clone a fid to use for creation */ 6307d50a29fSAl Viro ofid = clone_fid(dfid); 631bd238fb4SLatchesar Ionkov if (IS_ERR(ofid)) { 632bd238fb4SLatchesar Ionkov err = PTR_ERR(ofid); 6335d385153SJoe Perches p9_debug(P9_DEBUG_VFS, "p9_client_walk failed %d\n", err); 634*dafbe689SDominique Martinet goto error; 635bd238fb4SLatchesar Ionkov } 636bd238fb4SLatchesar Ionkov 637bd238fb4SLatchesar Ionkov err = p9_client_fcreate(ofid, name, perm, mode, extension); 63851a87c55SEric Van Hensbergen if (err < 0) { 6395d385153SJoe Perches p9_debug(P9_DEBUG_VFS, "p9_client_fcreate failed %d\n", err); 640bd238fb4SLatchesar Ionkov goto error; 64151a87c55SEric Van Hensbergen } 642bd238fb4SLatchesar Ionkov 643b6054793SAneesh Kumar K.V if (!(perm & P9_DMLINK)) { 644bd238fb4SLatchesar Ionkov /* now walk from the parent so we can get unopened fid */ 6456d27e64dSVenkateswararao Jujjuri fid = p9_client_walk(dfid, 1, &name, 1); 646bd238fb4SLatchesar Ionkov if (IS_ERR(fid)) { 647bd238fb4SLatchesar Ionkov err = PTR_ERR(fid); 648b6054793SAneesh Kumar K.V p9_debug(P9_DEBUG_VFS, 649b6054793SAneesh Kumar K.V "p9_client_walk failed %d\n", err); 650bd238fb4SLatchesar Ionkov goto error; 6516d27e64dSVenkateswararao Jujjuri } 652b6054793SAneesh Kumar K.V /* 653b6054793SAneesh Kumar K.V * instantiate inode and assign the unopened fid to the dentry 654b6054793SAneesh Kumar K.V */ 655ed80fcfaSAneesh Kumar K.V inode = v9fs_get_new_inode_from_fid(v9ses, fid, dir->i_sb); 656bd238fb4SLatchesar Ionkov if (IS_ERR(inode)) { 657bd238fb4SLatchesar Ionkov err = PTR_ERR(inode); 658b6054793SAneesh Kumar K.V p9_debug(P9_DEBUG_VFS, 659b6054793SAneesh Kumar K.V "inode creation failed %d\n", err); 660bd238fb4SLatchesar Ionkov goto error; 661bd238fb4SLatchesar Ionkov } 662*dafbe689SDominique Martinet v9fs_fid_add(dentry, &fid); 6635441ae5eSAneesh Kumar K.V d_instantiate(dentry, inode); 664b6054793SAneesh Kumar K.V } 665b48dbb99SDominique Martinet p9_fid_put(dfid); 666bd238fb4SLatchesar Ionkov return ofid; 667bd238fb4SLatchesar Ionkov error: 668*dafbe689SDominique Martinet p9_fid_put(dfid); 669b48dbb99SDominique Martinet p9_fid_put(ofid); 670b48dbb99SDominique Martinet p9_fid_put(fid); 671bd238fb4SLatchesar Ionkov return ERR_PTR(err); 672bd238fb4SLatchesar Ionkov } 673bd238fb4SLatchesar Ionkov 6742bad8471SEric Van Hensbergen /** 675e43ae79cSMiklos Szeredi * v9fs_vfs_create - VFS hook to create a regular file 676bc868036SDavid Howells * @mnt_userns: The user namespace of the mount 677bc868036SDavid Howells * @dir: The parent directory 678bc868036SDavid Howells * @dentry: The name of file to be created 679bc868036SDavid Howells * @mode: The UNIX file mode to set 680bc868036SDavid Howells * @excl: True if the file must not yet exist 681e43ae79cSMiklos Szeredi * 682e43ae79cSMiklos Szeredi * open(.., O_CREAT) is handled in v9fs_vfs_atomic_open(). This is only called 683e43ae79cSMiklos Szeredi * for mknod(2). 684e43ae79cSMiklos Szeredi * 6852bad8471SEric Van Hensbergen */ 6862bad8471SEric Van Hensbergen 6872bad8471SEric Van Hensbergen static int 688549c7297SChristian Brauner v9fs_vfs_create(struct user_namespace *mnt_userns, struct inode *dir, 689549c7297SChristian Brauner struct dentry *dentry, umode_t mode, bool excl) 6902bad8471SEric Van Hensbergen { 691e43ae79cSMiklos Szeredi struct v9fs_session_info *v9ses = v9fs_inode2v9ses(dir); 692e43ae79cSMiklos Szeredi u32 perm = unixmode2p9mode(v9ses, mode); 693e43ae79cSMiklos Szeredi struct p9_fid *fid; 6946a3124a3SLatchesar Ionkov 695e43ae79cSMiklos Szeredi /* P9_OEXCL? */ 696e43ae79cSMiklos Szeredi fid = v9fs_create(v9ses, dir, dentry, NULL, perm, P9_ORDWR); 697e43ae79cSMiklos Szeredi if (IS_ERR(fid)) 698e43ae79cSMiklos Szeredi return PTR_ERR(fid); 6996a3124a3SLatchesar Ionkov 700d28c61f0SAneesh Kumar K.V v9fs_invalidate_inode_attr(dir); 701b48dbb99SDominique Martinet p9_fid_put(fid); 7026a3124a3SLatchesar Ionkov 7036a3124a3SLatchesar Ionkov return 0; 7042bad8471SEric Van Hensbergen } 7052bad8471SEric Van Hensbergen 7062bad8471SEric Van Hensbergen /** 7072bad8471SEric Van Hensbergen * v9fs_vfs_mkdir - VFS mkdir hook to create a directory 708bc868036SDavid Howells * @mnt_userns: The user namespace of the mount 709ee443996SEric Van Hensbergen * @dir: inode that is being unlinked 7102bad8471SEric Van Hensbergen * @dentry: dentry that is being unlinked 7112bad8471SEric Van Hensbergen * @mode: mode for new directory 7122bad8471SEric Van Hensbergen * 7132bad8471SEric Van Hensbergen */ 7142bad8471SEric Van Hensbergen 715549c7297SChristian Brauner static int v9fs_vfs_mkdir(struct user_namespace *mnt_userns, struct inode *dir, 716549c7297SChristian Brauner struct dentry *dentry, umode_t mode) 7172bad8471SEric Van Hensbergen { 7186a3124a3SLatchesar Ionkov int err; 719bd238fb4SLatchesar Ionkov u32 perm; 720bd238fb4SLatchesar Ionkov struct p9_fid *fid; 721d28c61f0SAneesh Kumar K.V struct v9fs_session_info *v9ses; 7226a3124a3SLatchesar Ionkov 7234b8e9923SAl Viro p9_debug(P9_DEBUG_VFS, "name %pd\n", dentry); 724bd238fb4SLatchesar Ionkov err = 0; 7256a3124a3SLatchesar Ionkov v9ses = v9fs_inode2v9ses(dir); 7266a3124a3SLatchesar Ionkov perm = unixmode2p9mode(v9ses, mode | S_IFDIR); 727bd238fb4SLatchesar Ionkov fid = v9fs_create(v9ses, dir, dentry, NULL, perm, P9_OREAD); 728bd238fb4SLatchesar Ionkov if (IS_ERR(fid)) { 729bd238fb4SLatchesar Ionkov err = PTR_ERR(fid); 730bd238fb4SLatchesar Ionkov fid = NULL; 731d28c61f0SAneesh Kumar K.V } else { 732b271ec47SAneesh Kumar K.V inc_nlink(dir); 733d28c61f0SAneesh Kumar K.V v9fs_invalidate_inode_attr(dir); 734d28c61f0SAneesh Kumar K.V } 7356a3124a3SLatchesar Ionkov 736bd238fb4SLatchesar Ionkov if (fid) 737b48dbb99SDominique Martinet p9_fid_put(fid); 7386a3124a3SLatchesar Ionkov 7396a3124a3SLatchesar Ionkov return err; 7402bad8471SEric Van Hensbergen } 7412bad8471SEric Van Hensbergen 7422bad8471SEric Van Hensbergen /** 7432bad8471SEric Van Hensbergen * v9fs_vfs_lookup - VFS lookup hook to "walk" to a new inode 7442bad8471SEric Van Hensbergen * @dir: inode that is being walked from 7452bad8471SEric Van Hensbergen * @dentry: dentry that is being walked to? 746fd2916bdSFabian Frederick * @flags: lookup flags (unused) 7472bad8471SEric Van Hensbergen * 7482bad8471SEric Van Hensbergen */ 7492bad8471SEric Van Hensbergen 75053c06f4eSAneesh Kumar K.V struct dentry *v9fs_vfs_lookup(struct inode *dir, struct dentry *dentry, 75100cd8dd3SAl Viro unsigned int flags) 7522bad8471SEric Van Hensbergen { 75373f50717SAneesh Kumar K.V struct dentry *res; 7542bad8471SEric Van Hensbergen struct v9fs_session_info *v9ses; 755bd238fb4SLatchesar Ionkov struct p9_fid *dfid, *fid; 7562bad8471SEric Van Hensbergen struct inode *inode; 7577880b43bSAl Viro const unsigned char *name; 7582bad8471SEric Van Hensbergen 7594b8e9923SAl Viro p9_debug(P9_DEBUG_VFS, "dir: %p dentry: (%pd) %p flags: %x\n", 7604b8e9923SAl Viro dir, dentry, dentry, flags); 7612bad8471SEric Van Hensbergen 76211e9b49bSSripathi Kodi if (dentry->d_name.len > NAME_MAX) 76311e9b49bSSripathi Kodi return ERR_PTR(-ENAMETOOLONG); 76411e9b49bSSripathi Kodi 7652bad8471SEric Van Hensbergen v9ses = v9fs_inode2v9ses(dir); 766a534c8d1SAneesh Kumar K.V /* We can walk d_parent because we hold the dir->i_mutex */ 76777d5a6b7SAl Viro dfid = v9fs_parent_fid(dentry); 768bd238fb4SLatchesar Ionkov if (IS_ERR(dfid)) 769e231c2eeSDavid Howells return ERR_CAST(dfid); 7702bad8471SEric Van Hensbergen 77173f50717SAneesh Kumar K.V /* 77273f50717SAneesh Kumar K.V * Make sure we don't use a wrong inode due to parallel 77373f50717SAneesh Kumar K.V * unlink. For cached mode create calls request for new 77473f50717SAneesh Kumar K.V * inode. But with cache disabled, lookup should do this. 77573f50717SAneesh Kumar K.V */ 776500e2ab6SAl Viro name = dentry->d_name.name; 777500e2ab6SAl Viro fid = p9_client_walk(dfid, 1, &name, 1); 778b48dbb99SDominique Martinet p9_fid_put(dfid); 779500e2ab6SAl Viro if (fid == ERR_PTR(-ENOENT)) 780500e2ab6SAl Viro inode = NULL; 781500e2ab6SAl Viro else if (IS_ERR(fid)) 782500e2ab6SAl Viro inode = ERR_CAST(fid); 783500e2ab6SAl Viro else if (v9ses->cache == CACHE_LOOSE || v9ses->cache == CACHE_FSCACHE) 784a78ce05dSAneesh Kumar K.V inode = v9fs_get_inode_from_fid(v9ses, fid, dir->i_sb); 78573f50717SAneesh Kumar K.V else 78673f50717SAneesh Kumar K.V inode = v9fs_get_new_inode_from_fid(v9ses, fid, dir->i_sb); 78773f50717SAneesh Kumar K.V /* 78873f50717SAneesh Kumar K.V * If we had a rename on the server and a parallel lookup 78973f50717SAneesh Kumar K.V * for the new name, then make sure we instantiate with 79073f50717SAneesh Kumar K.V * the new name. ie look up for a/b, while on server somebody 79173f50717SAneesh Kumar K.V * moved b under k and client parallely did a lookup for 79273f50717SAneesh Kumar K.V * k/b. 79373f50717SAneesh Kumar K.V */ 79441d28bcaSAl Viro res = d_splice_alias(inode, dentry); 795500e2ab6SAl Viro if (!IS_ERR(fid)) { 796a3b2157eSAl Viro if (!res) 797*dafbe689SDominique Martinet v9fs_fid_add(dentry, &fid); 798a3b2157eSAl Viro else if (!IS_ERR(res)) 799*dafbe689SDominique Martinet v9fs_fid_add(res, &fid); 800a3b2157eSAl Viro else 801b48dbb99SDominique Martinet p9_fid_put(fid); 802500e2ab6SAl Viro } 8037b5be621SAl Viro return res; 8042bad8471SEric Van Hensbergen } 8052bad8471SEric Van Hensbergen 806d9585277SAl Viro static int 807e43ae79cSMiklos Szeredi v9fs_vfs_atomic_open(struct inode *dir, struct dentry *dentry, 8086e195b0fSDominique Martinet struct file *file, unsigned int flags, umode_t mode) 809e43ae79cSMiklos Szeredi { 810e43ae79cSMiklos Szeredi int err; 811e43ae79cSMiklos Szeredi u32 perm; 812e43ae79cSMiklos Szeredi struct v9fs_inode *v9inode; 813e43ae79cSMiklos Szeredi struct v9fs_session_info *v9ses; 814e43ae79cSMiklos Szeredi struct p9_fid *fid, *inode_fid; 815e43ae79cSMiklos Szeredi struct dentry *res = NULL; 816987a6485SGreg Kurz struct inode *inode; 817e43ae79cSMiklos Szeredi 81800699ad8SAl Viro if (d_in_lookup(dentry)) { 81900cd8dd3SAl Viro res = v9fs_vfs_lookup(dir, dentry, 0); 820e43ae79cSMiklos Szeredi if (IS_ERR(res)) 821d9585277SAl Viro return PTR_ERR(res); 822e43ae79cSMiklos Szeredi 823e43ae79cSMiklos Szeredi if (res) 824e43ae79cSMiklos Szeredi dentry = res; 825e43ae79cSMiklos Szeredi } 826e43ae79cSMiklos Szeredi 827e43ae79cSMiklos Szeredi /* Only creates */ 8282b0143b5SDavid Howells if (!(flags & O_CREAT) || d_really_is_positive(dentry)) 829e45198a6SAl Viro return finish_no_open(file, res); 830e43ae79cSMiklos Szeredi 831e43ae79cSMiklos Szeredi err = 0; 832fae74696SGeyslan G. Bem 833e43ae79cSMiklos Szeredi v9ses = v9fs_inode2v9ses(dir); 834e43ae79cSMiklos Szeredi perm = unixmode2p9mode(v9ses, mode); 835e43ae79cSMiklos Szeredi fid = v9fs_create(v9ses, dir, dentry, NULL, perm, 836e43ae79cSMiklos Szeredi v9fs_uflags2omode(flags, 837e43ae79cSMiklos Szeredi v9fs_proto_dotu(v9ses))); 838e43ae79cSMiklos Szeredi if (IS_ERR(fid)) { 839e43ae79cSMiklos Szeredi err = PTR_ERR(fid); 840e43ae79cSMiklos Szeredi goto error; 841e43ae79cSMiklos Szeredi } 842e43ae79cSMiklos Szeredi 843e43ae79cSMiklos Szeredi v9fs_invalidate_inode_attr(dir); 844987a6485SGreg Kurz inode = d_inode(dentry); 845987a6485SGreg Kurz v9inode = V9FS_I(inode); 846e43ae79cSMiklos Szeredi mutex_lock(&v9inode->v_mutex); 847fb89b45cSDominique Martinet if ((v9ses->cache == CACHE_LOOSE || v9ses->cache == CACHE_FSCACHE) && 848fb89b45cSDominique Martinet !v9inode->writeback_fid && 849e43ae79cSMiklos Szeredi ((flags & O_ACCMODE) != O_RDONLY)) { 850e43ae79cSMiklos Szeredi /* 851e43ae79cSMiklos Szeredi * clone a fid and add it to writeback_fid 852e43ae79cSMiklos Szeredi * we do it during open time instead of 853e43ae79cSMiklos Szeredi * page dirty time via write_begin/page_mkwrite 854e43ae79cSMiklos Szeredi * because we want write after unlink usecase 855e43ae79cSMiklos Szeredi * to work. 856e43ae79cSMiklos Szeredi */ 857e43ae79cSMiklos Szeredi inode_fid = v9fs_writeback_fid(dentry); 858e43ae79cSMiklos Szeredi if (IS_ERR(inode_fid)) { 859e43ae79cSMiklos Szeredi err = PTR_ERR(inode_fid); 860e43ae79cSMiklos Szeredi mutex_unlock(&v9inode->v_mutex); 861e43ae79cSMiklos Szeredi goto error; 862e43ae79cSMiklos Szeredi } 863e43ae79cSMiklos Szeredi v9inode->writeback_fid = (void *) inode_fid; 864e43ae79cSMiklos Szeredi } 865e43ae79cSMiklos Szeredi mutex_unlock(&v9inode->v_mutex); 866be12af3eSAl Viro err = finish_open(file, dentry, generic_file_open); 86730d90494SAl Viro if (err) 868e43ae79cSMiklos Szeredi goto error; 869e43ae79cSMiklos Szeredi 87030d90494SAl Viro file->private_data = fid; 871fb89b45cSDominique Martinet if (v9ses->cache == CACHE_LOOSE || v9ses->cache == CACHE_FSCACHE) 87224e42e32SDavid Howells fscache_use_cookie(v9fs_inode_cookie(v9inode), 87324e42e32SDavid Howells file->f_mode & FMODE_WRITE); 874*dafbe689SDominique Martinet v9fs_open_fid_add(inode, &fid); 875e43ae79cSMiklos Szeredi 87673a09dd9SAl Viro file->f_mode |= FMODE_CREATED; 877e43ae79cSMiklos Szeredi out: 878e43ae79cSMiklos Szeredi dput(res); 879d9585277SAl Viro return err; 880e43ae79cSMiklos Szeredi 881e43ae79cSMiklos Szeredi error: 882b48dbb99SDominique Martinet p9_fid_put(fid); 883e43ae79cSMiklos Szeredi goto out; 884e43ae79cSMiklos Szeredi } 885e43ae79cSMiklos Szeredi 8862bad8471SEric Van Hensbergen /** 8872bad8471SEric Van Hensbergen * v9fs_vfs_unlink - VFS unlink hook to delete an inode 8882bad8471SEric Van Hensbergen * @i: inode that is being unlinked 88973c592b9SEric Van Hensbergen * @d: dentry that is being unlinked 8902bad8471SEric Van Hensbergen * 8912bad8471SEric Van Hensbergen */ 8922bad8471SEric Van Hensbergen 89353c06f4eSAneesh Kumar K.V int v9fs_vfs_unlink(struct inode *i, struct dentry *d) 8942bad8471SEric Van Hensbergen { 8952bad8471SEric Van Hensbergen return v9fs_remove(i, d, 0); 8962bad8471SEric Van Hensbergen } 8972bad8471SEric Van Hensbergen 8982bad8471SEric Van Hensbergen /** 8992bad8471SEric Van Hensbergen * v9fs_vfs_rmdir - VFS unlink hook to delete a directory 9002bad8471SEric Van Hensbergen * @i: inode that is being unlinked 90173c592b9SEric Van Hensbergen * @d: dentry that is being unlinked 9022bad8471SEric Van Hensbergen * 9032bad8471SEric Van Hensbergen */ 9042bad8471SEric Van Hensbergen 90553c06f4eSAneesh Kumar K.V int v9fs_vfs_rmdir(struct inode *i, struct dentry *d) 9062bad8471SEric Van Hensbergen { 90748e370ffSAneesh Kumar K.V return v9fs_remove(i, d, AT_REMOVEDIR); 9082bad8471SEric Van Hensbergen } 9092bad8471SEric Van Hensbergen 9102bad8471SEric Van Hensbergen /** 9112bad8471SEric Van Hensbergen * v9fs_vfs_rename - VFS hook to rename an inode 912bc868036SDavid Howells * @mnt_userns: The user namespace of the mount 9132bad8471SEric Van Hensbergen * @old_dir: old dir inode 9142bad8471SEric Van Hensbergen * @old_dentry: old dentry 9152bad8471SEric Van Hensbergen * @new_dir: new dir inode 9162bad8471SEric Van Hensbergen * @new_dentry: new dentry 917bc868036SDavid Howells * @flags: RENAME_* flags 9182bad8471SEric Van Hensbergen * 9192bad8471SEric Van Hensbergen */ 9202bad8471SEric Van Hensbergen 92153c06f4eSAneesh Kumar K.V int 922549c7297SChristian Brauner v9fs_vfs_rename(struct user_namespace *mnt_userns, struct inode *old_dir, 923549c7297SChristian Brauner struct dentry *old_dentry, struct inode *new_dir, 924549c7297SChristian Brauner struct dentry *new_dentry, unsigned int flags) 9252bad8471SEric Van Hensbergen { 926d28c61f0SAneesh Kumar K.V int retval; 927bd238fb4SLatchesar Ionkov struct inode *old_inode; 928b271ec47SAneesh Kumar K.V struct inode *new_inode; 929bd238fb4SLatchesar Ionkov struct v9fs_session_info *v9ses; 930*dafbe689SDominique Martinet struct p9_fid *oldfid = NULL, *dfid = NULL; 931*dafbe689SDominique Martinet struct p9_fid *olddirfid = NULL; 932*dafbe689SDominique Martinet struct p9_fid *newdirfid = NULL; 933bd238fb4SLatchesar Ionkov struct p9_wstat wstat; 9342bad8471SEric Van Hensbergen 9351cd66c93SMiklos Szeredi if (flags) 9361cd66c93SMiklos Szeredi return -EINVAL; 9371cd66c93SMiklos Szeredi 9385d385153SJoe Perches p9_debug(P9_DEBUG_VFS, "\n"); 939bd238fb4SLatchesar Ionkov retval = 0; 9402b0143b5SDavid Howells old_inode = d_inode(old_dentry); 9412b0143b5SDavid Howells new_inode = d_inode(new_dentry); 942bd238fb4SLatchesar Ionkov v9ses = v9fs_inode2v9ses(old_inode); 943bd238fb4SLatchesar Ionkov oldfid = v9fs_fid_lookup(old_dentry); 944da977b2cSEric Van Hensbergen if (IS_ERR(oldfid)) 945da977b2cSEric Van Hensbergen return PTR_ERR(oldfid); 946da977b2cSEric Van Hensbergen 9476636b6dcSJianyong Wu dfid = v9fs_parent_fid(old_dentry); 9486636b6dcSJianyong Wu olddirfid = clone_fid(dfid); 949b48dbb99SDominique Martinet p9_fid_put(dfid); 950*dafbe689SDominique Martinet dfid = NULL; 9516636b6dcSJianyong Wu 952da977b2cSEric Van Hensbergen if (IS_ERR(olddirfid)) { 953da977b2cSEric Van Hensbergen retval = PTR_ERR(olddirfid); 954*dafbe689SDominique Martinet goto error; 955da977b2cSEric Van Hensbergen } 956da977b2cSEric Van Hensbergen 9576636b6dcSJianyong Wu dfid = v9fs_parent_fid(new_dentry); 9586636b6dcSJianyong Wu newdirfid = clone_fid(dfid); 959b48dbb99SDominique Martinet p9_fid_put(dfid); 960*dafbe689SDominique Martinet dfid = NULL; 9616636b6dcSJianyong Wu 962da977b2cSEric Van Hensbergen if (IS_ERR(newdirfid)) { 963da977b2cSEric Van Hensbergen retval = PTR_ERR(newdirfid); 964*dafbe689SDominique Martinet goto error; 9652bad8471SEric Van Hensbergen } 9662bad8471SEric Van Hensbergen 967a534c8d1SAneesh Kumar K.V down_write(&v9ses->rename_sem); 9684681dbdaSSripathi Kodi if (v9fs_proto_dotl(v9ses)) { 9699e8fb38eSAneesh Kumar K.V retval = p9_client_renameat(olddirfid, old_dentry->d_name.name, 9709e8fb38eSAneesh Kumar K.V newdirfid, new_dentry->d_name.name); 9719e8fb38eSAneesh Kumar K.V if (retval == -EOPNOTSUPP) 9724681dbdaSSripathi Kodi retval = p9_client_rename(oldfid, newdirfid, 9739e8fb38eSAneesh Kumar K.V new_dentry->d_name.name); 9749e8fb38eSAneesh Kumar K.V if (retval != -EOPNOTSUPP) 975*dafbe689SDominique Martinet goto error_locked; 9764681dbdaSSripathi Kodi } 977a534c8d1SAneesh Kumar K.V if (old_dentry->d_parent != new_dentry->d_parent) { 978a534c8d1SAneesh Kumar K.V /* 979a534c8d1SAneesh Kumar K.V * 9P .u can only handle file rename in the same directory 980a534c8d1SAneesh Kumar K.V */ 9814681dbdaSSripathi Kodi 9825d385153SJoe Perches p9_debug(P9_DEBUG_ERROR, "old dir and new dir are different\n"); 983621997cdSEric Van Hensbergen retval = -EXDEV; 984*dafbe689SDominique Martinet goto error_locked; 9852bad8471SEric Van Hensbergen } 986531b1094SLatchesar Ionkov v9fs_blank_wstat(&wstat); 987ba17674fSLatchesar Ionkov wstat.muid = v9ses->uname; 9887880b43bSAl Viro wstat.name = new_dentry->d_name.name; 989bd238fb4SLatchesar Ionkov retval = p9_client_wstat(oldfid, &wstat); 9902bad8471SEric Van Hensbergen 991*dafbe689SDominique Martinet error_locked: 992b271ec47SAneesh Kumar K.V if (!retval) { 993b271ec47SAneesh Kumar K.V if (new_inode) { 994b271ec47SAneesh Kumar K.V if (S_ISDIR(new_inode->i_mode)) 995b271ec47SAneesh Kumar K.V clear_nlink(new_inode); 996b271ec47SAneesh Kumar K.V else 997ac89b2efSEryu Guan v9fs_dec_count(new_inode); 998b271ec47SAneesh Kumar K.V } 999b271ec47SAneesh Kumar K.V if (S_ISDIR(old_inode->i_mode)) { 1000b271ec47SAneesh Kumar K.V if (!new_inode) 1001b271ec47SAneesh Kumar K.V inc_nlink(new_dir); 1002ac89b2efSEryu Guan v9fs_dec_count(old_dir); 1003b271ec47SAneesh Kumar K.V } 10043bc86de3SAneesh Kumar K.V v9fs_invalidate_inode_attr(old_inode); 1005d28c61f0SAneesh Kumar K.V v9fs_invalidate_inode_attr(old_dir); 1006d28c61f0SAneesh Kumar K.V v9fs_invalidate_inode_attr(new_dir); 10073bc86de3SAneesh Kumar K.V 1008a534c8d1SAneesh Kumar K.V /* successful rename */ 1009a534c8d1SAneesh Kumar K.V d_move(old_dentry, new_dentry); 1010b271ec47SAneesh Kumar K.V } 1011a534c8d1SAneesh Kumar K.V up_write(&v9ses->rename_sem); 1012*dafbe689SDominique Martinet 1013*dafbe689SDominique Martinet error: 1014b48dbb99SDominique Martinet p9_fid_put(newdirfid); 1015b48dbb99SDominique Martinet p9_fid_put(olddirfid); 1016b48dbb99SDominique Martinet p9_fid_put(oldfid); 10172bad8471SEric Van Hensbergen return retval; 10182bad8471SEric Van Hensbergen } 10192bad8471SEric Van Hensbergen 10202bad8471SEric Van Hensbergen /** 1021943ffb58SAdrian Bunk * v9fs_vfs_getattr - retrieve file metadata 1022bc868036SDavid Howells * @mnt_userns: The user namespace of the mount 1023a528d35eSDavid Howells * @path: Object to query 1024ee443996SEric Van Hensbergen * @stat: metadata structure to populate 1025a528d35eSDavid Howells * @request_mask: Mask of STATX_xxx flags indicating the caller's interests 1026a528d35eSDavid Howells * @flags: AT_STATX_xxx setting 10272bad8471SEric Van Hensbergen * 10282bad8471SEric Van Hensbergen */ 10292bad8471SEric Van Hensbergen 10302bad8471SEric Van Hensbergen static int 1031549c7297SChristian Brauner v9fs_vfs_getattr(struct user_namespace *mnt_userns, const struct path *path, 1032549c7297SChristian Brauner struct kstat *stat, u32 request_mask, unsigned int flags) 10332bad8471SEric Van Hensbergen { 1034a528d35eSDavid Howells struct dentry *dentry = path->dentry; 1035bd238fb4SLatchesar Ionkov struct v9fs_session_info *v9ses; 1036bd238fb4SLatchesar Ionkov struct p9_fid *fid; 103751a87c55SEric Van Hensbergen struct p9_wstat *st; 10382bad8471SEric Van Hensbergen 10395d385153SJoe Perches p9_debug(P9_DEBUG_VFS, "dentry: %p\n", dentry); 104042869c8aSAneesh Kumar K.V v9ses = v9fs_dentry2v9ses(dentry); 1041a1211908SAneesh Kumar K.V if (v9ses->cache == CACHE_LOOSE || v9ses->cache == CACHE_FSCACHE) { 10420d56a451SChristian Brauner generic_fillattr(&init_user_ns, d_inode(dentry), stat); 1043a1211908SAneesh Kumar K.V return 0; 1044a1211908SAneesh Kumar K.V } 1045bd238fb4SLatchesar Ionkov fid = v9fs_fid_lookup(dentry); 1046da977b2cSEric Van Hensbergen if (IS_ERR(fid)) 1047da977b2cSEric Van Hensbergen return PTR_ERR(fid); 10482bad8471SEric Van Hensbergen 1049bd238fb4SLatchesar Ionkov st = p9_client_stat(fid); 1050b48dbb99SDominique Martinet p9_fid_put(fid); 1051bd238fb4SLatchesar Ionkov if (IS_ERR(st)) 1052bd238fb4SLatchesar Ionkov return PTR_ERR(st); 10532bad8471SEric Van Hensbergen 10545e3cc1eeSHou Tao v9fs_stat2inode(st, d_inode(dentry), dentry->d_sb, 0); 10550d56a451SChristian Brauner generic_fillattr(&init_user_ns, d_inode(dentry), stat); 10562bad8471SEric Van Hensbergen 105762b2be59SLatchesar Ionkov p9stat_free(st); 1058bd238fb4SLatchesar Ionkov kfree(st); 1059bd238fb4SLatchesar Ionkov return 0; 10602bad8471SEric Van Hensbergen } 10612bad8471SEric Van Hensbergen 10622bad8471SEric Van Hensbergen /** 10632bad8471SEric Van Hensbergen * v9fs_vfs_setattr - set file metadata 1064bc868036SDavid Howells * @mnt_userns: The user namespace of the mount 10652bad8471SEric Van Hensbergen * @dentry: file whose metadata to set 10662bad8471SEric Van Hensbergen * @iattr: metadata assignment structure 10672bad8471SEric Van Hensbergen * 10682bad8471SEric Van Hensbergen */ 10692bad8471SEric Van Hensbergen 1070549c7297SChristian Brauner static int v9fs_vfs_setattr(struct user_namespace *mnt_userns, 1071549c7297SChristian Brauner struct dentry *dentry, struct iattr *iattr) 10722bad8471SEric Van Hensbergen { 10736636b6dcSJianyong Wu int retval, use_dentry = 0; 107424e42e32SDavid Howells struct inode *inode = d_inode(dentry); 107524e42e32SDavid Howells struct v9fs_inode *v9inode = V9FS_I(inode); 1076bd238fb4SLatchesar Ionkov struct v9fs_session_info *v9ses; 107766246641SJianyong Wu struct p9_fid *fid = NULL; 1078bd238fb4SLatchesar Ionkov struct p9_wstat wstat; 10792bad8471SEric Van Hensbergen 10805d385153SJoe Perches p9_debug(P9_DEBUG_VFS, "\n"); 10812f221d6fSChristian Brauner retval = setattr_prepare(&init_user_ns, dentry, iattr); 1082059c138bSAneesh Kumar K.V if (retval) 1083059c138bSAneesh Kumar K.V return retval; 1084059c138bSAneesh Kumar K.V 1085bd238fb4SLatchesar Ionkov retval = -EPERM; 108642869c8aSAneesh Kumar K.V v9ses = v9fs_dentry2v9ses(dentry); 108766246641SJianyong Wu if (iattr->ia_valid & ATTR_FILE) { 108866246641SJianyong Wu fid = iattr->ia_file->private_data; 108966246641SJianyong Wu WARN_ON(!fid); 109066246641SJianyong Wu } 10916636b6dcSJianyong Wu if (!fid) { 1092bd238fb4SLatchesar Ionkov fid = v9fs_fid_lookup(dentry); 10936636b6dcSJianyong Wu use_dentry = 1; 10946636b6dcSJianyong Wu } 1095da977b2cSEric Van Hensbergen if (IS_ERR(fid)) 1096da977b2cSEric Van Hensbergen return PTR_ERR(fid); 10972bad8471SEric Van Hensbergen 1098531b1094SLatchesar Ionkov v9fs_blank_wstat(&wstat); 10992bad8471SEric Van Hensbergen if (iattr->ia_valid & ATTR_MODE) 1100531b1094SLatchesar Ionkov wstat.mode = unixmode2p9mode(v9ses, iattr->ia_mode); 11012bad8471SEric Van Hensbergen 11022bad8471SEric Van Hensbergen if (iattr->ia_valid & ATTR_MTIME) 1103531b1094SLatchesar Ionkov wstat.mtime = iattr->ia_mtime.tv_sec; 11042bad8471SEric Van Hensbergen 11052bad8471SEric Van Hensbergen if (iattr->ia_valid & ATTR_ATIME) 1106531b1094SLatchesar Ionkov wstat.atime = iattr->ia_atime.tv_sec; 11072bad8471SEric Van Hensbergen 11082bad8471SEric Van Hensbergen if (iattr->ia_valid & ATTR_SIZE) 1109531b1094SLatchesar Ionkov wstat.length = iattr->ia_size; 11102bad8471SEric Van Hensbergen 1111dd6102fbSSripathi Kodi if (v9fs_proto_dotu(v9ses)) { 1112531b1094SLatchesar Ionkov if (iattr->ia_valid & ATTR_UID) 1113531b1094SLatchesar Ionkov wstat.n_uid = iattr->ia_uid; 11142bad8471SEric Van Hensbergen 1115531b1094SLatchesar Ionkov if (iattr->ia_valid & ATTR_GID) 1116531b1094SLatchesar Ionkov wstat.n_gid = iattr->ia_gid; 11172bad8471SEric Van Hensbergen } 1118059c138bSAneesh Kumar K.V 11193dc5436aSAneesh Kumar K.V /* Write all dirty data */ 1120e36cb0b8SDavid Howells if (d_is_reg(dentry)) 112124e42e32SDavid Howells filemap_write_and_wait(inode->i_mapping); 11223dc5436aSAneesh Kumar K.V 1123f10fc50fSAneesh Kumar K.V retval = p9_client_wstat(fid, &wstat); 11246636b6dcSJianyong Wu 11256636b6dcSJianyong Wu if (use_dentry) 1126b48dbb99SDominique Martinet p9_fid_put(fid); 11276636b6dcSJianyong Wu 1128f10fc50fSAneesh Kumar K.V if (retval < 0) 1129f10fc50fSAneesh Kumar K.V return retval; 1130059c138bSAneesh Kumar K.V 1131059c138bSAneesh Kumar K.V if ((iattr->ia_valid & ATTR_SIZE) && 113224e42e32SDavid Howells iattr->ia_size != i_size_read(inode)) { 113324e42e32SDavid Howells truncate_setsize(inode, iattr->ia_size); 113424e42e32SDavid Howells fscache_resize_cookie(v9fs_inode_cookie(v9inode), iattr->ia_size); 113524e42e32SDavid Howells } 1136059c138bSAneesh Kumar K.V 113724e42e32SDavid Howells v9fs_invalidate_inode_attr(inode); 11381025774cSChristoph Hellwig 113924e42e32SDavid Howells setattr_copy(&init_user_ns, inode, iattr); 114024e42e32SDavid Howells mark_inode_dirty(inode); 11411025774cSChristoph Hellwig return 0; 11422bad8471SEric Van Hensbergen } 11432bad8471SEric Van Hensbergen 11442bad8471SEric Van Hensbergen /** 1145531b1094SLatchesar Ionkov * v9fs_stat2inode - populate an inode structure with mistat info 1146531b1094SLatchesar Ionkov * @stat: Plan 9 metadata (mistat) structure 11472bad8471SEric Van Hensbergen * @inode: inode to populate 11482bad8471SEric Van Hensbergen * @sb: superblock of filesystem 11495e3cc1eeSHou Tao * @flags: control flags (e.g. V9FS_STAT2INODE_KEEP_ISIZE) 11502bad8471SEric Van Hensbergen * 11512bad8471SEric Van Hensbergen */ 11522bad8471SEric Van Hensbergen 11532bad8471SEric Van Hensbergen void 115451a87c55SEric Van Hensbergen v9fs_stat2inode(struct p9_wstat *stat, struct inode *inode, 11555e3cc1eeSHou Tao struct super_block *sb, unsigned int flags) 11562bad8471SEric Van Hensbergen { 11573eda0de6SAl Viro umode_t mode; 11582bad8471SEric Van Hensbergen struct v9fs_session_info *v9ses = sb->s_fs_info; 1159b3cbea03SAneesh Kumar K.V struct v9fs_inode *v9inode = V9FS_I(inode); 11602bad8471SEric Van Hensbergen 1161bfe86848SMiklos Szeredi set_nlink(inode, 1); 11622bad8471SEric Van Hensbergen 1163531b1094SLatchesar Ionkov inode->i_atime.tv_sec = stat->atime; 1164531b1094SLatchesar Ionkov inode->i_mtime.tv_sec = stat->mtime; 1165531b1094SLatchesar Ionkov inode->i_ctime.tv_sec = stat->mtime; 11662bad8471SEric Van Hensbergen 1167bd32b82dSLatchesar Ionkov inode->i_uid = v9ses->dfltuid; 1168bd32b82dSLatchesar Ionkov inode->i_gid = v9ses->dfltgid; 11692bad8471SEric Van Hensbergen 1170dd6102fbSSripathi Kodi if (v9fs_proto_dotu(v9ses)) { 1171531b1094SLatchesar Ionkov inode->i_uid = stat->n_uid; 1172531b1094SLatchesar Ionkov inode->i_gid = stat->n_gid; 1173531b1094SLatchesar Ionkov } 11745717144aSAneesh Kumar K.V if ((S_ISREG(inode->i_mode)) || (S_ISDIR(inode->i_mode))) { 11759652c732SAl Viro if (v9fs_proto_dotu(v9ses)) { 11769652c732SAl Viro unsigned int i_nlink; 11775717144aSAneesh Kumar K.V /* 11789652c732SAl Viro * Hadlink support got added later to the .u extension. 11799652c732SAl Viro * So there can be a server out there that doesn't 11809652c732SAl Viro * support this even with .u extension. That would 11819652c732SAl Viro * just leave us with stat->extension being an empty 11829652c732SAl Viro * string, though. 11835717144aSAneesh Kumar K.V */ 11845717144aSAneesh Kumar K.V /* HARDLINKCOUNT %u */ 11859652c732SAl Viro if (sscanf(stat->extension, 11869652c732SAl Viro " HARDLINKCOUNT %u", &i_nlink) == 1) 1187bfe86848SMiklos Szeredi set_nlink(inode, i_nlink); 11885717144aSAneesh Kumar K.V } 11895717144aSAneesh Kumar K.V } 1190df345c67SAneesh Kumar K.V mode = p9mode2perm(v9ses, stat); 119145089142SAneesh Kumar K.V mode |= inode->i_mode & ~S_IALLUGO; 119245089142SAneesh Kumar K.V inode->i_mode = mode; 11932bad8471SEric Van Hensbergen 11945e3cc1eeSHou Tao if (!(flags & V9FS_STAT2INODE_KEEP_ISIZE)) 11955e3cc1eeSHou Tao v9fs_i_size_write(inode, stat->length); 1196bd238fb4SLatchesar Ionkov /* not real number of blocks, but 512 byte ones ... */ 11975e3cc1eeSHou Tao inode->i_blocks = (stat->length + 512 - 1) >> 9; 1198b3cbea03SAneesh Kumar K.V v9inode->cache_validity &= ~V9FS_INO_INVALID_ATTR; 11992bad8471SEric Van Hensbergen } 12002bad8471SEric Van Hensbergen 12012bad8471SEric Van Hensbergen /** 12022bad8471SEric Van Hensbergen * v9fs_qid2ino - convert qid into inode number 12032bad8471SEric Van Hensbergen * @qid: qid to hash 12042bad8471SEric Van Hensbergen * 12052bad8471SEric Van Hensbergen * BUG: potential for inode number collisions? 12062bad8471SEric Van Hensbergen */ 12072bad8471SEric Van Hensbergen 1208bd238fb4SLatchesar Ionkov ino_t v9fs_qid2ino(struct p9_qid *qid) 12092bad8471SEric Van Hensbergen { 12102bad8471SEric Van Hensbergen u64 path = qid->path + 2; 12112bad8471SEric Van Hensbergen ino_t i = 0; 12122bad8471SEric Van Hensbergen 12132bad8471SEric Van Hensbergen if (sizeof(ino_t) == sizeof(path)) 12142bad8471SEric Van Hensbergen memcpy(&i, &path, sizeof(ino_t)); 12152bad8471SEric Van Hensbergen else 12162bad8471SEric Van Hensbergen i = (ino_t) (path ^ (path >> 32)); 12172bad8471SEric Van Hensbergen 12182bad8471SEric Van Hensbergen return i; 12192bad8471SEric Van Hensbergen } 12202bad8471SEric Van Hensbergen 12212bad8471SEric Van Hensbergen /** 12226b255391SAl Viro * v9fs_vfs_get_link - follow a symlink path 12232bad8471SEric Van Hensbergen * @dentry: dentry for symlink 12246b255391SAl Viro * @inode: inode for symlink 1225fceef393SAl Viro * @done: delayed call for when we are done with the return value 12262bad8471SEric Van Hensbergen */ 12272bad8471SEric Van Hensbergen 12286b255391SAl Viro static const char *v9fs_vfs_get_link(struct dentry *dentry, 1229fceef393SAl Viro struct inode *inode, 1230fceef393SAl Viro struct delayed_call *done) 12312bad8471SEric Van Hensbergen { 12326b255391SAl Viro struct v9fs_session_info *v9ses; 12336b255391SAl Viro struct p9_fid *fid; 123490e4fc88SAl Viro struct p9_wstat *st; 1235680baacbSAl Viro char *res; 12362bad8471SEric Van Hensbergen 12376b255391SAl Viro if (!dentry) 12386b255391SAl Viro return ERR_PTR(-ECHILD); 12396b255391SAl Viro 12406b255391SAl Viro v9ses = v9fs_dentry2v9ses(dentry); 1241e5690f26SDominique Martinet if (!v9fs_proto_dotu(v9ses)) 1242e5690f26SDominique Martinet return ERR_PTR(-EBADF); 1243e5690f26SDominique Martinet 12444b8e9923SAl Viro p9_debug(P9_DEBUG_VFS, "%pd\n", dentry); 1245e5690f26SDominique Martinet fid = v9fs_fid_lookup(dentry); 12462bad8471SEric Van Hensbergen 124790e4fc88SAl Viro if (IS_ERR(fid)) 124890e4fc88SAl Viro return ERR_CAST(fid); 12492bad8471SEric Van Hensbergen 125090e4fc88SAl Viro st = p9_client_stat(fid); 1251b48dbb99SDominique Martinet p9_fid_put(fid); 125290e4fc88SAl Viro if (IS_ERR(st)) 125390e4fc88SAl Viro return ERR_CAST(st); 125490e4fc88SAl Viro 125590e4fc88SAl Viro if (!(st->mode & P9_DMSYMLINK)) { 125690e4fc88SAl Viro p9stat_free(st); 125790e4fc88SAl Viro kfree(st); 125890e4fc88SAl Viro return ERR_PTR(-EINVAL); 12592bad8471SEric Van Hensbergen } 1260680baacbSAl Viro res = st->extension; 126190e4fc88SAl Viro st->extension = NULL; 1262680baacbSAl Viro if (strlen(res) >= PATH_MAX) 1263680baacbSAl Viro res[PATH_MAX - 1] = '\0'; 1264680baacbSAl Viro 126590e4fc88SAl Viro p9stat_free(st); 126690e4fc88SAl Viro kfree(st); 1267fceef393SAl Viro set_delayed_call(done, kfree_link, res); 1268fceef393SAl Viro return res; 12692bad8471SEric Van Hensbergen } 12702bad8471SEric Van Hensbergen 12712bad8471SEric 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 1275fd2916bdSFabian Frederick * @perm: 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, 1281c2837de7SAl Viro u32 perm, const char *extension) 1282531b1094SLatchesar Ionkov { 1283bd238fb4SLatchesar Ionkov struct p9_fid *fid; 1284d28c61f0SAneesh Kumar K.V struct v9fs_session_info *v9ses; 1285531b1094SLatchesar Ionkov 12866a3124a3SLatchesar Ionkov v9ses = v9fs_inode2v9ses(dir); 1287dd6102fbSSripathi Kodi if (!v9fs_proto_dotu(v9ses)) { 12885d385153SJoe Perches p9_debug(P9_DEBUG_ERROR, "not extended\n"); 12896a3124a3SLatchesar Ionkov return -EPERM; 1290531b1094SLatchesar Ionkov } 1291531b1094SLatchesar Ionkov 1292bd238fb4SLatchesar Ionkov fid = v9fs_create(v9ses, dir, dentry, (char *) extension, perm, 1293bd238fb4SLatchesar Ionkov P9_OREAD); 1294bd238fb4SLatchesar Ionkov if (IS_ERR(fid)) 1295bd238fb4SLatchesar Ionkov return PTR_ERR(fid); 1296da977b2cSEric Van Hensbergen 1297d28c61f0SAneesh Kumar K.V v9fs_invalidate_inode_attr(dir); 1298b48dbb99SDominique Martinet p9_fid_put(fid); 12996a3124a3SLatchesar Ionkov return 0; 1300531b1094SLatchesar Ionkov } 1301531b1094SLatchesar Ionkov 1302531b1094SLatchesar Ionkov /** 1303531b1094SLatchesar Ionkov * v9fs_vfs_symlink - helper function to create symlinks 1304bc868036SDavid Howells * @mnt_userns: The user namespace of the mount 1305531b1094SLatchesar Ionkov * @dir: directory inode containing symlink 1306531b1094SLatchesar Ionkov * @dentry: dentry for symlink 1307531b1094SLatchesar Ionkov * @symname: symlink data 1308531b1094SLatchesar Ionkov * 1309ee443996SEric Van Hensbergen * See Also: 9P2000.u RFC for more information 1310531b1094SLatchesar Ionkov * 1311531b1094SLatchesar Ionkov */ 1312531b1094SLatchesar Ionkov 1313531b1094SLatchesar Ionkov static int 1314549c7297SChristian Brauner v9fs_vfs_symlink(struct user_namespace *mnt_userns, struct inode *dir, 1315549c7297SChristian Brauner struct dentry *dentry, const char *symname) 1316531b1094SLatchesar Ionkov { 13174b8e9923SAl Viro p9_debug(P9_DEBUG_VFS, " %lu,%pd,%s\n", 13184b8e9923SAl Viro dir->i_ino, dentry, symname); 1319531b1094SLatchesar Ionkov 1320c2837de7SAl Viro return v9fs_vfs_mkspecial(dir, dentry, P9_DMSYMLINK, symname); 1321531b1094SLatchesar Ionkov } 1322531b1094SLatchesar Ionkov 1323b46c267eSAl Viro #define U32_MAX_DIGITS 10 1324b46c267eSAl Viro 13252bad8471SEric Van Hensbergen /** 13262bad8471SEric Van Hensbergen * v9fs_vfs_link - create a hardlink 13272bad8471SEric Van Hensbergen * @old_dentry: dentry for file to link to 13282bad8471SEric Van Hensbergen * @dir: inode destination for new link 132973c592b9SEric Van Hensbergen * @dentry: dentry for link 13302bad8471SEric Van Hensbergen * 13312bad8471SEric Van Hensbergen */ 13322bad8471SEric Van Hensbergen 13332bad8471SEric Van Hensbergen static int 13342bad8471SEric Van Hensbergen v9fs_vfs_link(struct dentry *old_dentry, struct inode *dir, 13352bad8471SEric Van Hensbergen struct dentry *dentry) 13362bad8471SEric Van Hensbergen { 1337531b1094SLatchesar Ionkov int retval; 1338b46c267eSAl Viro char name[1 + U32_MAX_DIGITS + 2]; /* sign + number + \n + \0 */ 1339d28c61f0SAneesh Kumar K.V struct p9_fid *oldfid; 13402bad8471SEric Van Hensbergen 13414b8e9923SAl Viro p9_debug(P9_DEBUG_VFS, " %lu,%pd,%pd\n", 13424b8e9923SAl Viro dir->i_ino, dentry, old_dentry); 13432bad8471SEric Van Hensbergen 1344da977b2cSEric Van Hensbergen oldfid = v9fs_fid_clone(old_dentry); 1345da977b2cSEric Van Hensbergen if (IS_ERR(oldfid)) 1346da977b2cSEric Van Hensbergen return PTR_ERR(oldfid); 13472bad8471SEric Van Hensbergen 134816cce6d2SLatchesar Ionkov sprintf(name, "%d\n", oldfid->fid); 1349bd238fb4SLatchesar Ionkov retval = v9fs_vfs_mkspecial(dir, dentry, P9_DMLINK, name); 1350c06c066aSAneesh Kumar K.V if (!retval) { 13512b0143b5SDavid Howells v9fs_refresh_inode(oldfid, d_inode(old_dentry)); 1352d28c61f0SAneesh Kumar K.V v9fs_invalidate_inode_attr(dir); 1353c06c066aSAneesh Kumar K.V } 1354b48dbb99SDominique Martinet p9_fid_put(oldfid); 13552bad8471SEric Van Hensbergen return retval; 13562bad8471SEric Van Hensbergen } 13572bad8471SEric Van Hensbergen 13582bad8471SEric Van Hensbergen /** 13592bad8471SEric Van Hensbergen * v9fs_vfs_mknod - create a special file 1360bc868036SDavid Howells * @mnt_userns: The user namespace of the mount 13612bad8471SEric Van Hensbergen * @dir: inode destination for new link 13622bad8471SEric Van Hensbergen * @dentry: dentry for file 13632bad8471SEric Van Hensbergen * @mode: mode for creation 1364ee443996SEric Van Hensbergen * @rdev: device associated with special file 13652bad8471SEric Van Hensbergen * 13662bad8471SEric Van Hensbergen */ 13672bad8471SEric Van Hensbergen 13682bad8471SEric Van Hensbergen static int 1369549c7297SChristian Brauner v9fs_vfs_mknod(struct user_namespace *mnt_userns, struct inode *dir, 1370549c7297SChristian Brauner struct dentry *dentry, umode_t mode, dev_t rdev) 13712bad8471SEric Van Hensbergen { 1372c2837de7SAl Viro struct v9fs_session_info *v9ses = v9fs_inode2v9ses(dir); 1373531b1094SLatchesar Ionkov int retval; 1374b46c267eSAl Viro char name[2 + U32_MAX_DIGITS + 1 + U32_MAX_DIGITS + 1]; 1375c2837de7SAl Viro u32 perm; 13762bad8471SEric Van Hensbergen 13776e195b0fSDominique Martinet p9_debug(P9_DEBUG_VFS, " %lu,%pd mode: %x MAJOR: %u MINOR: %u\n", 13784b8e9923SAl Viro dir->i_ino, dentry, mode, 13795d385153SJoe Perches MAJOR(rdev), MINOR(rdev)); 13802bad8471SEric Van Hensbergen 13812bad8471SEric Van Hensbergen /* build extension */ 13822bad8471SEric Van Hensbergen if (S_ISBLK(mode)) 1383531b1094SLatchesar Ionkov sprintf(name, "b %u %u", MAJOR(rdev), MINOR(rdev)); 13842bad8471SEric Van Hensbergen else if (S_ISCHR(mode)) 1385531b1094SLatchesar Ionkov sprintf(name, "c %u %u", MAJOR(rdev), MINOR(rdev)); 1386b46c267eSAl Viro else 1387531b1094SLatchesar Ionkov *name = 0; 13882bad8471SEric Van Hensbergen 1389c2837de7SAl Viro perm = unixmode2p9mode(v9ses, mode); 1390c2837de7SAl Viro retval = v9fs_vfs_mkspecial(dir, dentry, perm, name); 13912bad8471SEric Van Hensbergen 13922bad8471SEric Van Hensbergen return retval; 13932bad8471SEric Van Hensbergen } 13942bad8471SEric Van Hensbergen 1395b3cbea03SAneesh Kumar K.V int v9fs_refresh_inode(struct p9_fid *fid, struct inode *inode) 1396b3cbea03SAneesh Kumar K.V { 139745089142SAneesh Kumar K.V int umode; 139845089142SAneesh Kumar K.V dev_t rdev; 1399b3cbea03SAneesh Kumar K.V struct p9_wstat *st; 1400b3cbea03SAneesh Kumar K.V struct v9fs_session_info *v9ses; 14015e3cc1eeSHou Tao unsigned int flags; 1402b3cbea03SAneesh Kumar K.V 1403b3cbea03SAneesh Kumar K.V v9ses = v9fs_inode2v9ses(inode); 1404b3cbea03SAneesh Kumar K.V st = p9_client_stat(fid); 1405b3cbea03SAneesh Kumar K.V if (IS_ERR(st)) 1406b3cbea03SAneesh Kumar K.V return PTR_ERR(st); 140745089142SAneesh Kumar K.V /* 140845089142SAneesh Kumar K.V * Don't update inode if the file type is different 140945089142SAneesh Kumar K.V */ 141045089142SAneesh Kumar K.V umode = p9mode2unixmode(v9ses, st, &rdev); 14116e3e2c43SAl Viro if (inode_wrong_type(inode, umode)) 141245089142SAneesh Kumar K.V goto out; 1413b3cbea03SAneesh Kumar K.V 1414b3cbea03SAneesh Kumar K.V /* 1415b3cbea03SAneesh Kumar K.V * We don't want to refresh inode->i_size, 1416b3cbea03SAneesh Kumar K.V * because we may have cached data 1417b3cbea03SAneesh Kumar K.V */ 14185e3cc1eeSHou Tao flags = (v9ses->cache == CACHE_LOOSE || v9ses->cache == CACHE_FSCACHE) ? 14195e3cc1eeSHou Tao V9FS_STAT2INODE_KEEP_ISIZE : 0; 14205e3cc1eeSHou Tao v9fs_stat2inode(st, inode, inode->i_sb, flags); 142145089142SAneesh Kumar K.V out: 1422b3cbea03SAneesh Kumar K.V p9stat_free(st); 1423b3cbea03SAneesh Kumar K.V kfree(st); 1424b3cbea03SAneesh Kumar K.V return 0; 1425b3cbea03SAneesh Kumar K.V } 1426b3cbea03SAneesh Kumar K.V 14279b6533c9SSripathi Kodi static const struct inode_operations v9fs_dir_inode_operations_dotu = { 14289b6533c9SSripathi Kodi .create = v9fs_vfs_create, 14299b6533c9SSripathi Kodi .lookup = v9fs_vfs_lookup, 1430e43ae79cSMiklos Szeredi .atomic_open = v9fs_vfs_atomic_open, 14319b6533c9SSripathi Kodi .symlink = v9fs_vfs_symlink, 143250cc42ffSVenkateswararao Jujjuri (JV) .link = v9fs_vfs_link, 14339b6533c9SSripathi Kodi .unlink = v9fs_vfs_unlink, 14349b6533c9SSripathi Kodi .mkdir = v9fs_vfs_mkdir, 14359b6533c9SSripathi Kodi .rmdir = v9fs_vfs_rmdir, 14361d76e313SAneesh Kumar K.V .mknod = v9fs_vfs_mknod, 14379b6533c9SSripathi Kodi .rename = v9fs_vfs_rename, 14389b6533c9SSripathi Kodi .getattr = v9fs_vfs_getattr, 14399b6533c9SSripathi Kodi .setattr = v9fs_vfs_setattr, 14409b6533c9SSripathi Kodi }; 14419b6533c9SSripathi Kodi 1442754661f1SArjan van de Ven static const struct inode_operations v9fs_dir_inode_operations = { 1443b501611aSEric Van Hensbergen .create = v9fs_vfs_create, 1444b501611aSEric Van Hensbergen .lookup = v9fs_vfs_lookup, 1445e43ae79cSMiklos Szeredi .atomic_open = v9fs_vfs_atomic_open, 1446b501611aSEric Van Hensbergen .unlink = v9fs_vfs_unlink, 1447b501611aSEric Van Hensbergen .mkdir = v9fs_vfs_mkdir, 1448b501611aSEric Van Hensbergen .rmdir = v9fs_vfs_rmdir, 1449b501611aSEric Van Hensbergen .mknod = v9fs_vfs_mknod, 1450b501611aSEric Van Hensbergen .rename = v9fs_vfs_rename, 1451b501611aSEric Van Hensbergen .getattr = v9fs_vfs_getattr, 1452b501611aSEric Van Hensbergen .setattr = v9fs_vfs_setattr, 1453b501611aSEric Van Hensbergen }; 1454b501611aSEric Van Hensbergen 1455754661f1SArjan van de Ven static const struct inode_operations v9fs_file_inode_operations = { 14562bad8471SEric Van Hensbergen .getattr = v9fs_vfs_getattr, 14572bad8471SEric Van Hensbergen .setattr = v9fs_vfs_setattr, 14582bad8471SEric Van Hensbergen }; 14592bad8471SEric Van Hensbergen 1460754661f1SArjan van de Ven static const struct inode_operations v9fs_symlink_inode_operations = { 14616b255391SAl Viro .get_link = v9fs_vfs_get_link, 14622bad8471SEric Van Hensbergen .getattr = v9fs_vfs_getattr, 14632bad8471SEric Van Hensbergen .setattr = v9fs_vfs_setattr, 14642bad8471SEric Van Hensbergen }; 14659b6533c9SSripathi Kodi 1466