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 */ 4026b39f6d2SAneesh Kumar K.V if (v9inode->writeback_fid) { 4036b39f6d2SAneesh Kumar K.V p9_client_clunk(v9inode->writeback_fid); 4046b39f6d2SAneesh Kumar K.V v9inode->writeback_fid = NULL; 4053cf387d7SAneesh Kumar K.V } 40660e78d2cSAbhishek Kulkarni } 40760e78d2cSAbhishek Kulkarni 408fd2421f5SAneesh Kumar K.V static int v9fs_test_inode(struct inode *inode, void *data) 409fd2421f5SAneesh Kumar K.V { 410fd2421f5SAneesh Kumar K.V int umode; 41145089142SAneesh Kumar K.V dev_t rdev; 412fd2421f5SAneesh Kumar K.V struct v9fs_inode *v9inode = V9FS_I(inode); 413fd2421f5SAneesh Kumar K.V struct p9_wstat *st = (struct p9_wstat *)data; 414fd2421f5SAneesh Kumar K.V struct v9fs_session_info *v9ses = v9fs_inode2v9ses(inode); 415fd2421f5SAneesh Kumar K.V 41645089142SAneesh Kumar K.V umode = p9mode2unixmode(v9ses, st, &rdev); 417fd2421f5SAneesh Kumar K.V /* don't match inode of different type */ 4186e3e2c43SAl Viro if (inode_wrong_type(inode, umode)) 419fd2421f5SAneesh Kumar K.V return 0; 420fd2421f5SAneesh Kumar K.V 421fd2421f5SAneesh Kumar K.V /* compare qid details */ 422fd2421f5SAneesh Kumar K.V if (memcmp(&v9inode->qid.version, 423fd2421f5SAneesh Kumar K.V &st->qid.version, sizeof(v9inode->qid.version))) 424fd2421f5SAneesh Kumar K.V return 0; 425fd2421f5SAneesh Kumar K.V 426fd2421f5SAneesh Kumar K.V if (v9inode->qid.type != st->qid.type) 427fd2421f5SAneesh Kumar K.V return 0; 4288ee03163STuomas Tynkkynen 4298ee03163STuomas Tynkkynen if (v9inode->qid.path != st->qid.path) 4308ee03163STuomas Tynkkynen return 0; 431fd2421f5SAneesh Kumar K.V return 1; 432fd2421f5SAneesh Kumar K.V } 433fd2421f5SAneesh Kumar K.V 434ed80fcfaSAneesh Kumar K.V static int v9fs_test_new_inode(struct inode *inode, void *data) 435ed80fcfaSAneesh Kumar K.V { 436ed80fcfaSAneesh Kumar K.V return 0; 437ed80fcfaSAneesh Kumar K.V } 438ed80fcfaSAneesh Kumar K.V 439fd2421f5SAneesh Kumar K.V static int v9fs_set_inode(struct inode *inode, void *data) 440fd2421f5SAneesh Kumar K.V { 441fd2421f5SAneesh Kumar K.V struct v9fs_inode *v9inode = V9FS_I(inode); 442fd2421f5SAneesh Kumar K.V struct p9_wstat *st = (struct p9_wstat *)data; 443fd2421f5SAneesh Kumar K.V 444fd2421f5SAneesh Kumar K.V memcpy(&v9inode->qid, &st->qid, sizeof(st->qid)); 445fd2421f5SAneesh Kumar K.V return 0; 446fd2421f5SAneesh Kumar K.V } 447fd2421f5SAneesh Kumar K.V 4485ffc0cb3SAneesh Kumar K.V static struct inode *v9fs_qid_iget(struct super_block *sb, 4495ffc0cb3SAneesh Kumar K.V struct p9_qid *qid, 450ed80fcfaSAneesh Kumar K.V struct p9_wstat *st, 451ed80fcfaSAneesh Kumar K.V int new) 4525ffc0cb3SAneesh Kumar K.V { 45345089142SAneesh Kumar K.V dev_t rdev; 4543eda0de6SAl Viro int retval; 4553eda0de6SAl Viro umode_t umode; 4565ffc0cb3SAneesh Kumar K.V unsigned long i_ino; 4575ffc0cb3SAneesh Kumar K.V struct inode *inode; 4585ffc0cb3SAneesh Kumar K.V struct v9fs_session_info *v9ses = sb->s_fs_info; 4596e195b0fSDominique Martinet int (*test)(struct inode *inode, void *data); 460ed80fcfaSAneesh Kumar K.V 461ed80fcfaSAneesh Kumar K.V if (new) 462ed80fcfaSAneesh Kumar K.V test = v9fs_test_new_inode; 463ed80fcfaSAneesh Kumar K.V else 464ed80fcfaSAneesh Kumar K.V test = v9fs_test_inode; 4655ffc0cb3SAneesh Kumar K.V 4665ffc0cb3SAneesh Kumar K.V i_ino = v9fs_qid2ino(qid); 467ed80fcfaSAneesh Kumar K.V inode = iget5_locked(sb, i_ino, test, v9fs_set_inode, st); 4685ffc0cb3SAneesh Kumar K.V if (!inode) 4695ffc0cb3SAneesh Kumar K.V return ERR_PTR(-ENOMEM); 4705ffc0cb3SAneesh Kumar K.V if (!(inode->i_state & I_NEW)) 4715ffc0cb3SAneesh Kumar K.V return inode; 4725ffc0cb3SAneesh Kumar K.V /* 4735ffc0cb3SAneesh Kumar K.V * initialize the inode with the stat info 4745ffc0cb3SAneesh Kumar K.V * FIXME!! we may need support for stale inodes 4755ffc0cb3SAneesh Kumar K.V * later. 4765ffc0cb3SAneesh Kumar K.V */ 477fd2421f5SAneesh Kumar K.V inode->i_ino = i_ino; 47845089142SAneesh Kumar K.V umode = p9mode2unixmode(v9ses, st, &rdev); 47945089142SAneesh Kumar K.V retval = v9fs_init_inode(v9ses, inode, umode, rdev); 4805ffc0cb3SAneesh Kumar K.V if (retval) 4815ffc0cb3SAneesh Kumar K.V goto error; 4825ffc0cb3SAneesh Kumar K.V 4835e3cc1eeSHou Tao v9fs_stat2inode(st, inode, sb, 0); 4845ffc0cb3SAneesh Kumar K.V v9fs_cache_inode_get_cookie(inode); 4855ffc0cb3SAneesh Kumar K.V unlock_new_inode(inode); 4865ffc0cb3SAneesh Kumar K.V return inode; 4875ffc0cb3SAneesh Kumar K.V error: 4880a73d0a2SAl Viro iget_failed(inode); 4895ffc0cb3SAneesh Kumar K.V return ERR_PTR(retval); 4905ffc0cb3SAneesh Kumar K.V 4915ffc0cb3SAneesh Kumar K.V } 4925ffc0cb3SAneesh Kumar K.V 49353c06f4eSAneesh Kumar K.V struct inode * 494a78ce05dSAneesh Kumar K.V v9fs_inode_from_fid(struct v9fs_session_info *v9ses, struct p9_fid *fid, 495ed80fcfaSAneesh Kumar K.V struct super_block *sb, int new) 4966a3124a3SLatchesar Ionkov { 49751a87c55SEric Van Hensbergen struct p9_wstat *st; 4985ffc0cb3SAneesh Kumar K.V struct inode *inode = NULL; 4996a3124a3SLatchesar Ionkov 500bd238fb4SLatchesar Ionkov st = p9_client_stat(fid); 50102bc3567SAbhishek Kulkarni if (IS_ERR(st)) 50202bc3567SAbhishek Kulkarni return ERR_CAST(st); 5032bad8471SEric Van Hensbergen 504ed80fcfaSAneesh Kumar K.V inode = v9fs_qid_iget(sb, &st->qid, st, new); 50502bc3567SAbhishek Kulkarni p9stat_free(st); 506bd238fb4SLatchesar Ionkov kfree(st); 5075ffc0cb3SAneesh Kumar K.V return inode; 5082bad8471SEric Van Hensbergen } 5092bad8471SEric Van Hensbergen 5102bad8471SEric Van Hensbergen /** 511f88657ceSAneesh Kumar K.V * v9fs_at_to_dotl_flags- convert Linux specific AT flags to 512f88657ceSAneesh Kumar K.V * plan 9 AT flag. 513f88657ceSAneesh Kumar K.V * @flags: flags to convert 514f88657ceSAneesh Kumar K.V */ 515f88657ceSAneesh Kumar K.V static int v9fs_at_to_dotl_flags(int flags) 516f88657ceSAneesh Kumar K.V { 517f88657ceSAneesh Kumar K.V int rflags = 0; 5186e195b0fSDominique Martinet 519f88657ceSAneesh Kumar K.V if (flags & AT_REMOVEDIR) 520f88657ceSAneesh Kumar K.V rflags |= P9_DOTL_AT_REMOVEDIR; 5216e195b0fSDominique Martinet 522f88657ceSAneesh Kumar K.V return rflags; 523f88657ceSAneesh Kumar K.V } 524f88657ceSAneesh Kumar K.V 525f88657ceSAneesh Kumar K.V /** 526ac89b2efSEryu Guan * v9fs_dec_count - helper functon to drop i_nlink. 527ac89b2efSEryu Guan * 528ac89b2efSEryu Guan * If a directory had nlink <= 2 (including . and ..), then we should not drop 529ac89b2efSEryu Guan * the link count, which indicates the underlying exported fs doesn't maintain 530ac89b2efSEryu Guan * nlink accurately. e.g. 531ac89b2efSEryu Guan * - overlayfs sets nlink to 1 for merged dir 532ac89b2efSEryu Guan * - ext4 (with dir_nlink feature enabled) sets nlink to 1 if a dir has more 533ac89b2efSEryu Guan * than EXT4_LINK_MAX (65000) links. 534ac89b2efSEryu Guan * 535ac89b2efSEryu Guan * @inode: inode whose nlink is being dropped 536ac89b2efSEryu Guan */ 537ac89b2efSEryu Guan static void v9fs_dec_count(struct inode *inode) 538ac89b2efSEryu Guan { 539ac89b2efSEryu Guan if (!S_ISDIR(inode->i_mode) || inode->i_nlink > 2) 540ac89b2efSEryu Guan drop_nlink(inode); 541ac89b2efSEryu Guan } 542ac89b2efSEryu Guan 543ac89b2efSEryu Guan /** 5442bad8471SEric Van Hensbergen * v9fs_remove - helper function to remove files and directories 54573c592b9SEric Van Hensbergen * @dir: directory inode that is being deleted 54648e370ffSAneesh Kumar K.V * @dentry: dentry that is being deleted 547fd2916bdSFabian Frederick * @flags: removing a directory 5482bad8471SEric Van Hensbergen * 5492bad8471SEric Van Hensbergen */ 5502bad8471SEric Van Hensbergen 55148e370ffSAneesh Kumar K.V static int v9fs_remove(struct inode *dir, struct dentry *dentry, int flags) 5522bad8471SEric Van Hensbergen { 55348e370ffSAneesh Kumar K.V struct inode *inode; 55448e370ffSAneesh Kumar K.V int retval = -EOPNOTSUPP; 55548e370ffSAneesh Kumar K.V struct p9_fid *v9fid, *dfid; 55648e370ffSAneesh Kumar K.V struct v9fs_session_info *v9ses; 5572bad8471SEric Van Hensbergen 5585d385153SJoe Perches p9_debug(P9_DEBUG_VFS, "inode: %p dentry: %p rmdir: %x\n", 55948e370ffSAneesh Kumar K.V dir, dentry, flags); 5602bad8471SEric Van Hensbergen 56148e370ffSAneesh Kumar K.V v9ses = v9fs_inode2v9ses(dir); 5622b0143b5SDavid Howells inode = d_inode(dentry); 56377d5a6b7SAl Viro dfid = v9fs_parent_fid(dentry); 56448e370ffSAneesh Kumar K.V if (IS_ERR(dfid)) { 56548e370ffSAneesh Kumar K.V retval = PTR_ERR(dfid); 5665d385153SJoe Perches p9_debug(P9_DEBUG_VFS, "fid lookup failed %d\n", retval); 56748e370ffSAneesh Kumar K.V return retval; 56848e370ffSAneesh Kumar K.V } 56948e370ffSAneesh Kumar K.V if (v9fs_proto_dotl(v9ses)) 570f88657ceSAneesh Kumar K.V retval = p9_client_unlinkat(dfid, dentry->d_name.name, 571f88657ceSAneesh Kumar K.V v9fs_at_to_dotl_flags(flags)); 5726636b6dcSJianyong Wu p9_client_clunk(dfid); 57348e370ffSAneesh Kumar K.V if (retval == -EOPNOTSUPP) { 57448e370ffSAneesh Kumar K.V /* Try the one based on path */ 57548e370ffSAneesh Kumar K.V v9fid = v9fs_fid_clone(dentry); 576da977b2cSEric Van Hensbergen if (IS_ERR(v9fid)) 577da977b2cSEric Van Hensbergen return PTR_ERR(v9fid); 578d994f405SAneesh Kumar K.V retval = p9_client_remove(v9fid); 57948e370ffSAneesh Kumar K.V } 580b271ec47SAneesh Kumar K.V if (!retval) { 581b271ec47SAneesh Kumar K.V /* 582b271ec47SAneesh Kumar K.V * directories on unlink should have zero 583b271ec47SAneesh Kumar K.V * link count 584b271ec47SAneesh Kumar K.V */ 58548e370ffSAneesh Kumar K.V if (flags & AT_REMOVEDIR) { 58648e370ffSAneesh Kumar K.V clear_nlink(inode); 587ac89b2efSEryu Guan v9fs_dec_count(dir); 588b271ec47SAneesh Kumar K.V } else 589ac89b2efSEryu Guan v9fs_dec_count(inode); 590d28c61f0SAneesh Kumar K.V 59148e370ffSAneesh Kumar K.V v9fs_invalidate_inode_attr(inode); 592d28c61f0SAneesh Kumar K.V v9fs_invalidate_inode_attr(dir); 593154372e6SEric Van Hensbergen 594154372e6SEric Van Hensbergen /* invalidate all fids associated with dentry */ 595154372e6SEric Van Hensbergen /* NOTE: This will not include open fids */ 596154372e6SEric Van Hensbergen dentry->d_op->d_release(dentry); 597b271ec47SAneesh Kumar K.V } 598d994f405SAneesh Kumar K.V return retval; 5992bad8471SEric Van Hensbergen } 6002bad8471SEric Van Hensbergen 601bd238fb4SLatchesar Ionkov /** 602bd238fb4SLatchesar Ionkov * v9fs_create - Create a file 603ee443996SEric Van Hensbergen * @v9ses: session information 604ee443996SEric Van Hensbergen * @dir: directory that dentry is being created in 605bd238fb4SLatchesar Ionkov * @dentry: dentry that is being created 6060e15597eSAbhishek Kulkarni * @extension: 9p2000.u extension string to support devices, etc. 607bd238fb4SLatchesar Ionkov * @perm: create permissions 608bd238fb4SLatchesar Ionkov * @mode: open mode 609bd238fb4SLatchesar Ionkov * 610bd238fb4SLatchesar Ionkov */ 611bd238fb4SLatchesar Ionkov static struct p9_fid * 612bd238fb4SLatchesar Ionkov v9fs_create(struct v9fs_session_info *v9ses, struct inode *dir, 613bd238fb4SLatchesar Ionkov struct dentry *dentry, char *extension, u32 perm, u8 mode) 614bd238fb4SLatchesar Ionkov { 615bd238fb4SLatchesar Ionkov int err; 6167880b43bSAl Viro const unsigned char *name; 6176636b6dcSJianyong Wu struct p9_fid *dfid, *ofid = NULL, *fid = NULL; 618bd238fb4SLatchesar Ionkov struct inode *inode; 619bd238fb4SLatchesar Ionkov 6204b8e9923SAl Viro p9_debug(P9_DEBUG_VFS, "name %pd\n", dentry); 62151a87c55SEric Van Hensbergen 622bd238fb4SLatchesar Ionkov err = 0; 6237880b43bSAl Viro name = dentry->d_name.name; 62477d5a6b7SAl Viro dfid = v9fs_parent_fid(dentry); 625bd238fb4SLatchesar Ionkov if (IS_ERR(dfid)) { 626bd238fb4SLatchesar Ionkov err = PTR_ERR(dfid); 6275d385153SJoe Perches p9_debug(P9_DEBUG_VFS, "fid lookup failed %d\n", err); 6286d27e64dSVenkateswararao Jujjuri return ERR_PTR(err); 629bd238fb4SLatchesar Ionkov } 630bd238fb4SLatchesar Ionkov 631bd238fb4SLatchesar Ionkov /* clone a fid to use for creation */ 6327d50a29fSAl Viro ofid = clone_fid(dfid); 633bd238fb4SLatchesar Ionkov if (IS_ERR(ofid)) { 634bd238fb4SLatchesar Ionkov err = PTR_ERR(ofid); 6355d385153SJoe Perches p9_debug(P9_DEBUG_VFS, "p9_client_walk failed %d\n", err); 6366636b6dcSJianyong Wu p9_client_clunk(dfid); 6376d27e64dSVenkateswararao Jujjuri return ERR_PTR(err); 638bd238fb4SLatchesar Ionkov } 639bd238fb4SLatchesar Ionkov 640bd238fb4SLatchesar Ionkov err = p9_client_fcreate(ofid, name, perm, mode, extension); 64151a87c55SEric Van Hensbergen if (err < 0) { 6425d385153SJoe Perches p9_debug(P9_DEBUG_VFS, "p9_client_fcreate failed %d\n", err); 6436636b6dcSJianyong Wu p9_client_clunk(dfid); 644bd238fb4SLatchesar Ionkov goto error; 64551a87c55SEric Van Hensbergen } 646bd238fb4SLatchesar Ionkov 647b6054793SAneesh Kumar K.V if (!(perm & P9_DMLINK)) { 648bd238fb4SLatchesar Ionkov /* now walk from the parent so we can get unopened fid */ 6496d27e64dSVenkateswararao Jujjuri fid = p9_client_walk(dfid, 1, &name, 1); 650bd238fb4SLatchesar Ionkov if (IS_ERR(fid)) { 651bd238fb4SLatchesar Ionkov err = PTR_ERR(fid); 652b6054793SAneesh Kumar K.V p9_debug(P9_DEBUG_VFS, 653b6054793SAneesh Kumar K.V "p9_client_walk failed %d\n", err); 654bd238fb4SLatchesar Ionkov fid = NULL; 6556636b6dcSJianyong Wu p9_client_clunk(dfid); 656bd238fb4SLatchesar Ionkov goto error; 6576d27e64dSVenkateswararao Jujjuri } 658b6054793SAneesh Kumar K.V /* 659b6054793SAneesh Kumar K.V * instantiate inode and assign the unopened fid to the dentry 660b6054793SAneesh Kumar K.V */ 661ed80fcfaSAneesh Kumar K.V inode = v9fs_get_new_inode_from_fid(v9ses, fid, dir->i_sb); 662bd238fb4SLatchesar Ionkov if (IS_ERR(inode)) { 663bd238fb4SLatchesar Ionkov err = PTR_ERR(inode); 664b6054793SAneesh Kumar K.V p9_debug(P9_DEBUG_VFS, 665b6054793SAneesh Kumar K.V "inode creation failed %d\n", err); 6666636b6dcSJianyong Wu p9_client_clunk(dfid); 667bd238fb4SLatchesar Ionkov goto error; 668bd238fb4SLatchesar Ionkov } 6692ea03e1dSAl Viro v9fs_fid_add(dentry, fid); 6705441ae5eSAneesh Kumar K.V d_instantiate(dentry, inode); 671b6054793SAneesh Kumar K.V } 6726636b6dcSJianyong Wu p9_client_clunk(dfid); 673bd238fb4SLatchesar Ionkov return ofid; 674bd238fb4SLatchesar Ionkov error: 675bd238fb4SLatchesar Ionkov if (ofid) 676bd238fb4SLatchesar Ionkov p9_client_clunk(ofid); 677bd238fb4SLatchesar Ionkov 678bd238fb4SLatchesar Ionkov if (fid) 679bd238fb4SLatchesar Ionkov p9_client_clunk(fid); 680bd238fb4SLatchesar Ionkov 681bd238fb4SLatchesar Ionkov return ERR_PTR(err); 682bd238fb4SLatchesar Ionkov } 683bd238fb4SLatchesar Ionkov 6842bad8471SEric Van Hensbergen /** 685e43ae79cSMiklos Szeredi * v9fs_vfs_create - VFS hook to create a regular file 686bc868036SDavid Howells * @mnt_userns: The user namespace of the mount 687bc868036SDavid Howells * @dir: The parent directory 688bc868036SDavid Howells * @dentry: The name of file to be created 689bc868036SDavid Howells * @mode: The UNIX file mode to set 690bc868036SDavid Howells * @excl: True if the file must not yet exist 691e43ae79cSMiklos Szeredi * 692e43ae79cSMiklos Szeredi * open(.., O_CREAT) is handled in v9fs_vfs_atomic_open(). This is only called 693e43ae79cSMiklos Szeredi * for mknod(2). 694e43ae79cSMiklos Szeredi * 6952bad8471SEric Van Hensbergen */ 6962bad8471SEric Van Hensbergen 6972bad8471SEric Van Hensbergen static int 698549c7297SChristian Brauner v9fs_vfs_create(struct user_namespace *mnt_userns, struct inode *dir, 699549c7297SChristian Brauner struct dentry *dentry, umode_t mode, bool excl) 7002bad8471SEric Van Hensbergen { 701e43ae79cSMiklos Szeredi struct v9fs_session_info *v9ses = v9fs_inode2v9ses(dir); 702e43ae79cSMiklos Szeredi u32 perm = unixmode2p9mode(v9ses, mode); 703e43ae79cSMiklos Szeredi struct p9_fid *fid; 7046a3124a3SLatchesar Ionkov 705e43ae79cSMiklos Szeredi /* P9_OEXCL? */ 706e43ae79cSMiklos Szeredi fid = v9fs_create(v9ses, dir, dentry, NULL, perm, P9_ORDWR); 707e43ae79cSMiklos Szeredi if (IS_ERR(fid)) 708e43ae79cSMiklos Szeredi return PTR_ERR(fid); 7096a3124a3SLatchesar Ionkov 710d28c61f0SAneesh Kumar K.V v9fs_invalidate_inode_attr(dir); 711bd238fb4SLatchesar Ionkov p9_client_clunk(fid); 7126a3124a3SLatchesar Ionkov 7136a3124a3SLatchesar Ionkov return 0; 7142bad8471SEric Van Hensbergen } 7152bad8471SEric Van Hensbergen 7162bad8471SEric Van Hensbergen /** 7172bad8471SEric Van Hensbergen * v9fs_vfs_mkdir - VFS mkdir hook to create a directory 718bc868036SDavid Howells * @mnt_userns: The user namespace of the mount 719ee443996SEric Van Hensbergen * @dir: inode that is being unlinked 7202bad8471SEric Van Hensbergen * @dentry: dentry that is being unlinked 7212bad8471SEric Van Hensbergen * @mode: mode for new directory 7222bad8471SEric Van Hensbergen * 7232bad8471SEric Van Hensbergen */ 7242bad8471SEric Van Hensbergen 725549c7297SChristian Brauner static int v9fs_vfs_mkdir(struct user_namespace *mnt_userns, struct inode *dir, 726549c7297SChristian Brauner struct dentry *dentry, umode_t mode) 7272bad8471SEric Van Hensbergen { 7286a3124a3SLatchesar Ionkov int err; 729bd238fb4SLatchesar Ionkov u32 perm; 730bd238fb4SLatchesar Ionkov struct p9_fid *fid; 731d28c61f0SAneesh Kumar K.V struct v9fs_session_info *v9ses; 7326a3124a3SLatchesar Ionkov 7334b8e9923SAl Viro p9_debug(P9_DEBUG_VFS, "name %pd\n", dentry); 734bd238fb4SLatchesar Ionkov err = 0; 7356a3124a3SLatchesar Ionkov v9ses = v9fs_inode2v9ses(dir); 7366a3124a3SLatchesar Ionkov perm = unixmode2p9mode(v9ses, mode | S_IFDIR); 737bd238fb4SLatchesar Ionkov fid = v9fs_create(v9ses, dir, dentry, NULL, perm, P9_OREAD); 738bd238fb4SLatchesar Ionkov if (IS_ERR(fid)) { 739bd238fb4SLatchesar Ionkov err = PTR_ERR(fid); 740bd238fb4SLatchesar Ionkov fid = NULL; 741d28c61f0SAneesh Kumar K.V } else { 742b271ec47SAneesh Kumar K.V inc_nlink(dir); 743d28c61f0SAneesh Kumar K.V v9fs_invalidate_inode_attr(dir); 744d28c61f0SAneesh Kumar K.V } 7456a3124a3SLatchesar Ionkov 746bd238fb4SLatchesar Ionkov if (fid) 747bd238fb4SLatchesar Ionkov p9_client_clunk(fid); 7486a3124a3SLatchesar Ionkov 7496a3124a3SLatchesar Ionkov return err; 7502bad8471SEric Van Hensbergen } 7512bad8471SEric Van Hensbergen 7522bad8471SEric Van Hensbergen /** 7532bad8471SEric Van Hensbergen * v9fs_vfs_lookup - VFS lookup hook to "walk" to a new inode 7542bad8471SEric Van Hensbergen * @dir: inode that is being walked from 7552bad8471SEric Van Hensbergen * @dentry: dentry that is being walked to? 756fd2916bdSFabian Frederick * @flags: lookup flags (unused) 7572bad8471SEric Van Hensbergen * 7582bad8471SEric Van Hensbergen */ 7592bad8471SEric Van Hensbergen 76053c06f4eSAneesh Kumar K.V struct dentry *v9fs_vfs_lookup(struct inode *dir, struct dentry *dentry, 76100cd8dd3SAl Viro unsigned int flags) 7622bad8471SEric Van Hensbergen { 76373f50717SAneesh Kumar K.V struct dentry *res; 7642bad8471SEric Van Hensbergen struct v9fs_session_info *v9ses; 765bd238fb4SLatchesar Ionkov struct p9_fid *dfid, *fid; 7662bad8471SEric Van Hensbergen struct inode *inode; 7677880b43bSAl Viro const unsigned char *name; 7682bad8471SEric Van Hensbergen 7694b8e9923SAl Viro p9_debug(P9_DEBUG_VFS, "dir: %p dentry: (%pd) %p flags: %x\n", 7704b8e9923SAl Viro dir, dentry, dentry, flags); 7712bad8471SEric Van Hensbergen 77211e9b49bSSripathi Kodi if (dentry->d_name.len > NAME_MAX) 77311e9b49bSSripathi Kodi return ERR_PTR(-ENAMETOOLONG); 77411e9b49bSSripathi Kodi 7752bad8471SEric Van Hensbergen v9ses = v9fs_inode2v9ses(dir); 776a534c8d1SAneesh Kumar K.V /* We can walk d_parent because we hold the dir->i_mutex */ 77777d5a6b7SAl Viro dfid = v9fs_parent_fid(dentry); 778bd238fb4SLatchesar Ionkov if (IS_ERR(dfid)) 779e231c2eeSDavid Howells return ERR_CAST(dfid); 7802bad8471SEric Van Hensbergen 78173f50717SAneesh Kumar K.V /* 78273f50717SAneesh Kumar K.V * Make sure we don't use a wrong inode due to parallel 78373f50717SAneesh Kumar K.V * unlink. For cached mode create calls request for new 78473f50717SAneesh Kumar K.V * inode. But with cache disabled, lookup should do this. 78573f50717SAneesh Kumar K.V */ 786500e2ab6SAl Viro name = dentry->d_name.name; 787500e2ab6SAl Viro fid = p9_client_walk(dfid, 1, &name, 1); 7886636b6dcSJianyong Wu p9_client_clunk(dfid); 789500e2ab6SAl Viro if (fid == ERR_PTR(-ENOENT)) 790500e2ab6SAl Viro inode = NULL; 791500e2ab6SAl Viro else if (IS_ERR(fid)) 792500e2ab6SAl Viro inode = ERR_CAST(fid); 793500e2ab6SAl Viro else if (v9ses->cache == CACHE_LOOSE || v9ses->cache == CACHE_FSCACHE) 794a78ce05dSAneesh Kumar K.V inode = v9fs_get_inode_from_fid(v9ses, fid, dir->i_sb); 79573f50717SAneesh Kumar K.V else 79673f50717SAneesh Kumar K.V inode = v9fs_get_new_inode_from_fid(v9ses, fid, dir->i_sb); 79773f50717SAneesh Kumar K.V /* 79873f50717SAneesh Kumar K.V * If we had a rename on the server and a parallel lookup 79973f50717SAneesh Kumar K.V * for the new name, then make sure we instantiate with 80073f50717SAneesh Kumar K.V * the new name. ie look up for a/b, while on server somebody 80173f50717SAneesh Kumar K.V * moved b under k and client parallely did a lookup for 80273f50717SAneesh Kumar K.V * k/b. 80373f50717SAneesh Kumar K.V */ 80441d28bcaSAl Viro res = d_splice_alias(inode, dentry); 805500e2ab6SAl Viro if (!IS_ERR(fid)) { 806a3b2157eSAl Viro if (!res) 807a3b2157eSAl Viro v9fs_fid_add(dentry, fid); 808a3b2157eSAl Viro else if (!IS_ERR(res)) 809a3b2157eSAl Viro v9fs_fid_add(res, fid); 810a3b2157eSAl Viro else 811bd238fb4SLatchesar Ionkov p9_client_clunk(fid); 812500e2ab6SAl Viro } 8137b5be621SAl Viro return res; 8142bad8471SEric Van Hensbergen } 8152bad8471SEric Van Hensbergen 816d9585277SAl Viro static int 817e43ae79cSMiklos Szeredi v9fs_vfs_atomic_open(struct inode *dir, struct dentry *dentry, 8186e195b0fSDominique Martinet struct file *file, unsigned int flags, umode_t mode) 819e43ae79cSMiklos Szeredi { 820e43ae79cSMiklos Szeredi int err; 821e43ae79cSMiklos Szeredi u32 perm; 822e43ae79cSMiklos Szeredi struct v9fs_inode *v9inode; 823e43ae79cSMiklos Szeredi struct v9fs_session_info *v9ses; 824e43ae79cSMiklos Szeredi struct p9_fid *fid, *inode_fid; 825e43ae79cSMiklos Szeredi struct dentry *res = NULL; 826987a6485SGreg Kurz struct inode *inode; 827e43ae79cSMiklos Szeredi 82800699ad8SAl Viro if (d_in_lookup(dentry)) { 82900cd8dd3SAl Viro res = v9fs_vfs_lookup(dir, dentry, 0); 830e43ae79cSMiklos Szeredi if (IS_ERR(res)) 831d9585277SAl Viro return PTR_ERR(res); 832e43ae79cSMiklos Szeredi 833e43ae79cSMiklos Szeredi if (res) 834e43ae79cSMiklos Szeredi dentry = res; 835e43ae79cSMiklos Szeredi } 836e43ae79cSMiklos Szeredi 837e43ae79cSMiklos Szeredi /* Only creates */ 8382b0143b5SDavid Howells if (!(flags & O_CREAT) || d_really_is_positive(dentry)) 839e45198a6SAl Viro return finish_no_open(file, res); 840e43ae79cSMiklos Szeredi 841e43ae79cSMiklos Szeredi err = 0; 842fae74696SGeyslan G. Bem 843e43ae79cSMiklos Szeredi v9ses = v9fs_inode2v9ses(dir); 844e43ae79cSMiklos Szeredi perm = unixmode2p9mode(v9ses, mode); 845e43ae79cSMiklos Szeredi fid = v9fs_create(v9ses, dir, dentry, NULL, perm, 846e43ae79cSMiklos Szeredi v9fs_uflags2omode(flags, 847e43ae79cSMiklos Szeredi v9fs_proto_dotu(v9ses))); 848e43ae79cSMiklos Szeredi if (IS_ERR(fid)) { 849e43ae79cSMiklos Szeredi err = PTR_ERR(fid); 850e43ae79cSMiklos Szeredi fid = NULL; 851e43ae79cSMiklos Szeredi goto error; 852e43ae79cSMiklos Szeredi } 853e43ae79cSMiklos Szeredi 854e43ae79cSMiklos Szeredi v9fs_invalidate_inode_attr(dir); 855987a6485SGreg Kurz inode = d_inode(dentry); 856987a6485SGreg Kurz v9inode = V9FS_I(inode); 857e43ae79cSMiklos Szeredi mutex_lock(&v9inode->v_mutex); 858fb89b45cSDominique Martinet if ((v9ses->cache == CACHE_LOOSE || v9ses->cache == CACHE_FSCACHE) && 859fb89b45cSDominique Martinet !v9inode->writeback_fid && 860e43ae79cSMiklos Szeredi ((flags & O_ACCMODE) != O_RDONLY)) { 861e43ae79cSMiklos Szeredi /* 862e43ae79cSMiklos Szeredi * clone a fid and add it to writeback_fid 863e43ae79cSMiklos Szeredi * we do it during open time instead of 864e43ae79cSMiklos Szeredi * page dirty time via write_begin/page_mkwrite 865e43ae79cSMiklos Szeredi * because we want write after unlink usecase 866e43ae79cSMiklos Szeredi * to work. 867e43ae79cSMiklos Szeredi */ 868e43ae79cSMiklos Szeredi inode_fid = v9fs_writeback_fid(dentry); 869e43ae79cSMiklos Szeredi if (IS_ERR(inode_fid)) { 870e43ae79cSMiklos Szeredi err = PTR_ERR(inode_fid); 871e43ae79cSMiklos Szeredi mutex_unlock(&v9inode->v_mutex); 872e43ae79cSMiklos Szeredi goto error; 873e43ae79cSMiklos Szeredi } 874e43ae79cSMiklos Szeredi v9inode->writeback_fid = (void *) inode_fid; 875e43ae79cSMiklos Szeredi } 876e43ae79cSMiklos Szeredi mutex_unlock(&v9inode->v_mutex); 877be12af3eSAl Viro err = finish_open(file, dentry, generic_file_open); 87830d90494SAl Viro if (err) 879e43ae79cSMiklos Szeredi goto error; 880e43ae79cSMiklos Szeredi 88130d90494SAl Viro file->private_data = fid; 882fb89b45cSDominique Martinet if (v9ses->cache == CACHE_LOOSE || v9ses->cache == CACHE_FSCACHE) 88324e42e32SDavid Howells fscache_use_cookie(v9fs_inode_cookie(v9inode), 88424e42e32SDavid Howells file->f_mode & FMODE_WRITE); 885987a6485SGreg Kurz v9fs_open_fid_add(inode, fid); 886e43ae79cSMiklos Szeredi 88773a09dd9SAl Viro file->f_mode |= FMODE_CREATED; 888e43ae79cSMiklos Szeredi out: 889e43ae79cSMiklos Szeredi dput(res); 890d9585277SAl Viro return err; 891e43ae79cSMiklos Szeredi 892e43ae79cSMiklos Szeredi error: 893e43ae79cSMiklos Szeredi if (fid) 894e43ae79cSMiklos Szeredi p9_client_clunk(fid); 895e43ae79cSMiklos Szeredi goto out; 896e43ae79cSMiklos Szeredi } 897e43ae79cSMiklos Szeredi 8982bad8471SEric Van Hensbergen /** 8992bad8471SEric Van Hensbergen * v9fs_vfs_unlink - VFS unlink hook to delete an inode 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_unlink(struct inode *i, struct dentry *d) 9062bad8471SEric Van Hensbergen { 9072bad8471SEric Van Hensbergen return v9fs_remove(i, d, 0); 9082bad8471SEric Van Hensbergen } 9092bad8471SEric Van Hensbergen 9102bad8471SEric Van Hensbergen /** 9112bad8471SEric Van Hensbergen * v9fs_vfs_rmdir - VFS unlink hook to delete a directory 9122bad8471SEric Van Hensbergen * @i: inode that is being unlinked 91373c592b9SEric Van Hensbergen * @d: dentry that is being unlinked 9142bad8471SEric Van Hensbergen * 9152bad8471SEric Van Hensbergen */ 9162bad8471SEric Van Hensbergen 91753c06f4eSAneesh Kumar K.V int v9fs_vfs_rmdir(struct inode *i, struct dentry *d) 9182bad8471SEric Van Hensbergen { 91948e370ffSAneesh Kumar K.V return v9fs_remove(i, d, AT_REMOVEDIR); 9202bad8471SEric Van Hensbergen } 9212bad8471SEric Van Hensbergen 9222bad8471SEric Van Hensbergen /** 9232bad8471SEric Van Hensbergen * v9fs_vfs_rename - VFS hook to rename an inode 924bc868036SDavid Howells * @mnt_userns: The user namespace of the mount 9252bad8471SEric Van Hensbergen * @old_dir: old dir inode 9262bad8471SEric Van Hensbergen * @old_dentry: old dentry 9272bad8471SEric Van Hensbergen * @new_dir: new dir inode 9282bad8471SEric Van Hensbergen * @new_dentry: new dentry 929bc868036SDavid Howells * @flags: RENAME_* flags 9302bad8471SEric Van Hensbergen * 9312bad8471SEric Van Hensbergen */ 9322bad8471SEric Van Hensbergen 93353c06f4eSAneesh Kumar K.V int 934549c7297SChristian Brauner v9fs_vfs_rename(struct user_namespace *mnt_userns, struct inode *old_dir, 935549c7297SChristian Brauner struct dentry *old_dentry, struct inode *new_dir, 936549c7297SChristian Brauner struct dentry *new_dentry, unsigned int flags) 9372bad8471SEric Van Hensbergen { 938d28c61f0SAneesh Kumar K.V int retval; 939bd238fb4SLatchesar Ionkov struct inode *old_inode; 940b271ec47SAneesh Kumar K.V struct inode *new_inode; 941bd238fb4SLatchesar Ionkov struct v9fs_session_info *v9ses; 9426636b6dcSJianyong Wu struct p9_fid *oldfid, *dfid; 943bd238fb4SLatchesar Ionkov struct p9_fid *olddirfid; 944bd238fb4SLatchesar Ionkov struct p9_fid *newdirfid; 945bd238fb4SLatchesar Ionkov struct p9_wstat wstat; 9462bad8471SEric Van Hensbergen 9471cd66c93SMiklos Szeredi if (flags) 9481cd66c93SMiklos Szeredi return -EINVAL; 9491cd66c93SMiklos Szeredi 9505d385153SJoe Perches p9_debug(P9_DEBUG_VFS, "\n"); 951bd238fb4SLatchesar Ionkov retval = 0; 9522b0143b5SDavid Howells old_inode = d_inode(old_dentry); 9532b0143b5SDavid Howells new_inode = d_inode(new_dentry); 954bd238fb4SLatchesar Ionkov v9ses = v9fs_inode2v9ses(old_inode); 955bd238fb4SLatchesar Ionkov oldfid = v9fs_fid_lookup(old_dentry); 956da977b2cSEric Van Hensbergen if (IS_ERR(oldfid)) 957da977b2cSEric Van Hensbergen return PTR_ERR(oldfid); 958da977b2cSEric Van Hensbergen 9596636b6dcSJianyong Wu dfid = v9fs_parent_fid(old_dentry); 9606636b6dcSJianyong Wu olddirfid = clone_fid(dfid); 9616636b6dcSJianyong Wu if (dfid && !IS_ERR(dfid)) 9626636b6dcSJianyong Wu p9_client_clunk(dfid); 9636636b6dcSJianyong Wu 964da977b2cSEric Van Hensbergen if (IS_ERR(olddirfid)) { 965da977b2cSEric Van Hensbergen retval = PTR_ERR(olddirfid); 966bd238fb4SLatchesar Ionkov goto done; 967da977b2cSEric Van Hensbergen } 968da977b2cSEric Van Hensbergen 9696636b6dcSJianyong Wu dfid = v9fs_parent_fid(new_dentry); 9706636b6dcSJianyong Wu newdirfid = clone_fid(dfid); 9716636b6dcSJianyong Wu p9_client_clunk(dfid); 9726636b6dcSJianyong Wu 973da977b2cSEric Van Hensbergen if (IS_ERR(newdirfid)) { 974da977b2cSEric Van Hensbergen retval = PTR_ERR(newdirfid); 975bd238fb4SLatchesar Ionkov goto clunk_olddir; 9762bad8471SEric Van Hensbergen } 9772bad8471SEric Van Hensbergen 978a534c8d1SAneesh Kumar K.V down_write(&v9ses->rename_sem); 9794681dbdaSSripathi Kodi if (v9fs_proto_dotl(v9ses)) { 9809e8fb38eSAneesh Kumar K.V retval = p9_client_renameat(olddirfid, old_dentry->d_name.name, 9819e8fb38eSAneesh Kumar K.V newdirfid, new_dentry->d_name.name); 9829e8fb38eSAneesh Kumar K.V if (retval == -EOPNOTSUPP) 9834681dbdaSSripathi Kodi retval = p9_client_rename(oldfid, newdirfid, 9849e8fb38eSAneesh Kumar K.V new_dentry->d_name.name); 9859e8fb38eSAneesh Kumar K.V if (retval != -EOPNOTSUPP) 9864681dbdaSSripathi Kodi goto clunk_newdir; 9874681dbdaSSripathi Kodi } 988a534c8d1SAneesh Kumar K.V if (old_dentry->d_parent != new_dentry->d_parent) { 989a534c8d1SAneesh Kumar K.V /* 990a534c8d1SAneesh Kumar K.V * 9P .u can only handle file rename in the same directory 991a534c8d1SAneesh Kumar K.V */ 9924681dbdaSSripathi Kodi 9935d385153SJoe Perches p9_debug(P9_DEBUG_ERROR, "old dir and new dir are different\n"); 994621997cdSEric Van Hensbergen retval = -EXDEV; 995bd238fb4SLatchesar Ionkov goto clunk_newdir; 9962bad8471SEric Van Hensbergen } 997531b1094SLatchesar Ionkov v9fs_blank_wstat(&wstat); 998ba17674fSLatchesar Ionkov wstat.muid = v9ses->uname; 9997880b43bSAl Viro wstat.name = new_dentry->d_name.name; 1000bd238fb4SLatchesar Ionkov retval = p9_client_wstat(oldfid, &wstat); 10012bad8471SEric Van Hensbergen 1002bd238fb4SLatchesar Ionkov clunk_newdir: 1003b271ec47SAneesh Kumar K.V if (!retval) { 1004b271ec47SAneesh Kumar K.V if (new_inode) { 1005b271ec47SAneesh Kumar K.V if (S_ISDIR(new_inode->i_mode)) 1006b271ec47SAneesh Kumar K.V clear_nlink(new_inode); 1007b271ec47SAneesh Kumar K.V else 1008ac89b2efSEryu Guan v9fs_dec_count(new_inode); 1009b271ec47SAneesh Kumar K.V } 1010b271ec47SAneesh Kumar K.V if (S_ISDIR(old_inode->i_mode)) { 1011b271ec47SAneesh Kumar K.V if (!new_inode) 1012b271ec47SAneesh Kumar K.V inc_nlink(new_dir); 1013ac89b2efSEryu Guan v9fs_dec_count(old_dir); 1014b271ec47SAneesh Kumar K.V } 10153bc86de3SAneesh Kumar K.V v9fs_invalidate_inode_attr(old_inode); 1016d28c61f0SAneesh Kumar K.V v9fs_invalidate_inode_attr(old_dir); 1017d28c61f0SAneesh Kumar K.V v9fs_invalidate_inode_attr(new_dir); 10183bc86de3SAneesh Kumar K.V 1019a534c8d1SAneesh Kumar K.V /* successful rename */ 1020a534c8d1SAneesh Kumar K.V d_move(old_dentry, new_dentry); 1021b271ec47SAneesh Kumar K.V } 1022a534c8d1SAneesh Kumar K.V up_write(&v9ses->rename_sem); 102322150c4fSLatchesar Ionkov p9_client_clunk(newdirfid); 10242bad8471SEric Van Hensbergen 1025bd238fb4SLatchesar Ionkov clunk_olddir: 102622150c4fSLatchesar Ionkov p9_client_clunk(olddirfid); 10272bad8471SEric Van Hensbergen 1028bd238fb4SLatchesar Ionkov done: 10296636b6dcSJianyong Wu p9_client_clunk(oldfid); 10302bad8471SEric Van Hensbergen return retval; 10312bad8471SEric Van Hensbergen } 10322bad8471SEric Van Hensbergen 10332bad8471SEric Van Hensbergen /** 1034943ffb58SAdrian Bunk * v9fs_vfs_getattr - retrieve file metadata 1035bc868036SDavid Howells * @mnt_userns: The user namespace of the mount 1036a528d35eSDavid Howells * @path: Object to query 1037ee443996SEric Van Hensbergen * @stat: metadata structure to populate 1038a528d35eSDavid Howells * @request_mask: Mask of STATX_xxx flags indicating the caller's interests 1039a528d35eSDavid Howells * @flags: AT_STATX_xxx setting 10402bad8471SEric Van Hensbergen * 10412bad8471SEric Van Hensbergen */ 10422bad8471SEric Van Hensbergen 10432bad8471SEric Van Hensbergen static int 1044549c7297SChristian Brauner v9fs_vfs_getattr(struct user_namespace *mnt_userns, const struct path *path, 1045549c7297SChristian Brauner struct kstat *stat, u32 request_mask, unsigned int flags) 10462bad8471SEric Van Hensbergen { 1047a528d35eSDavid Howells struct dentry *dentry = path->dentry; 1048bd238fb4SLatchesar Ionkov struct v9fs_session_info *v9ses; 1049bd238fb4SLatchesar Ionkov struct p9_fid *fid; 105051a87c55SEric Van Hensbergen struct p9_wstat *st; 10512bad8471SEric Van Hensbergen 10525d385153SJoe Perches p9_debug(P9_DEBUG_VFS, "dentry: %p\n", dentry); 105342869c8aSAneesh Kumar K.V v9ses = v9fs_dentry2v9ses(dentry); 1054a1211908SAneesh Kumar K.V if (v9ses->cache == CACHE_LOOSE || v9ses->cache == CACHE_FSCACHE) { 10550d56a451SChristian Brauner generic_fillattr(&init_user_ns, d_inode(dentry), stat); 1056a1211908SAneesh Kumar K.V return 0; 1057a1211908SAneesh Kumar K.V } 1058bd238fb4SLatchesar Ionkov fid = v9fs_fid_lookup(dentry); 1059da977b2cSEric Van Hensbergen if (IS_ERR(fid)) 1060da977b2cSEric Van Hensbergen return PTR_ERR(fid); 10612bad8471SEric Van Hensbergen 1062bd238fb4SLatchesar Ionkov st = p9_client_stat(fid); 10636636b6dcSJianyong Wu p9_client_clunk(fid); 1064bd238fb4SLatchesar Ionkov if (IS_ERR(st)) 1065bd238fb4SLatchesar Ionkov return PTR_ERR(st); 10662bad8471SEric Van Hensbergen 10675e3cc1eeSHou Tao v9fs_stat2inode(st, d_inode(dentry), dentry->d_sb, 0); 10680d56a451SChristian Brauner generic_fillattr(&init_user_ns, d_inode(dentry), stat); 10692bad8471SEric Van Hensbergen 107062b2be59SLatchesar Ionkov p9stat_free(st); 1071bd238fb4SLatchesar Ionkov kfree(st); 1072bd238fb4SLatchesar Ionkov return 0; 10732bad8471SEric Van Hensbergen } 10742bad8471SEric Van Hensbergen 10752bad8471SEric Van Hensbergen /** 10762bad8471SEric Van Hensbergen * v9fs_vfs_setattr - set file metadata 1077bc868036SDavid Howells * @mnt_userns: The user namespace of the mount 10782bad8471SEric Van Hensbergen * @dentry: file whose metadata to set 10792bad8471SEric Van Hensbergen * @iattr: metadata assignment structure 10802bad8471SEric Van Hensbergen * 10812bad8471SEric Van Hensbergen */ 10822bad8471SEric Van Hensbergen 1083549c7297SChristian Brauner static int v9fs_vfs_setattr(struct user_namespace *mnt_userns, 1084549c7297SChristian Brauner struct dentry *dentry, struct iattr *iattr) 10852bad8471SEric Van Hensbergen { 10866636b6dcSJianyong Wu int retval, use_dentry = 0; 108724e42e32SDavid Howells struct inode *inode = d_inode(dentry); 108824e42e32SDavid Howells struct v9fs_inode *v9inode = V9FS_I(inode); 1089bd238fb4SLatchesar Ionkov struct v9fs_session_info *v9ses; 109066246641SJianyong Wu struct p9_fid *fid = NULL; 1091bd238fb4SLatchesar Ionkov struct p9_wstat wstat; 10922bad8471SEric Van Hensbergen 10935d385153SJoe Perches p9_debug(P9_DEBUG_VFS, "\n"); 10942f221d6fSChristian Brauner retval = setattr_prepare(&init_user_ns, dentry, iattr); 1095059c138bSAneesh Kumar K.V if (retval) 1096059c138bSAneesh Kumar K.V return retval; 1097059c138bSAneesh Kumar K.V 1098bd238fb4SLatchesar Ionkov retval = -EPERM; 109942869c8aSAneesh Kumar K.V v9ses = v9fs_dentry2v9ses(dentry); 110066246641SJianyong Wu if (iattr->ia_valid & ATTR_FILE) { 110166246641SJianyong Wu fid = iattr->ia_file->private_data; 110266246641SJianyong Wu WARN_ON(!fid); 110366246641SJianyong Wu } 11046636b6dcSJianyong Wu if (!fid) { 1105bd238fb4SLatchesar Ionkov fid = v9fs_fid_lookup(dentry); 11066636b6dcSJianyong Wu use_dentry = 1; 11076636b6dcSJianyong Wu } 1108da977b2cSEric Van Hensbergen if (IS_ERR(fid)) 1109da977b2cSEric Van Hensbergen return PTR_ERR(fid); 11102bad8471SEric Van Hensbergen 1111531b1094SLatchesar Ionkov v9fs_blank_wstat(&wstat); 11122bad8471SEric Van Hensbergen if (iattr->ia_valid & ATTR_MODE) 1113531b1094SLatchesar Ionkov wstat.mode = unixmode2p9mode(v9ses, iattr->ia_mode); 11142bad8471SEric Van Hensbergen 11152bad8471SEric Van Hensbergen if (iattr->ia_valid & ATTR_MTIME) 1116531b1094SLatchesar Ionkov wstat.mtime = iattr->ia_mtime.tv_sec; 11172bad8471SEric Van Hensbergen 11182bad8471SEric Van Hensbergen if (iattr->ia_valid & ATTR_ATIME) 1119531b1094SLatchesar Ionkov wstat.atime = iattr->ia_atime.tv_sec; 11202bad8471SEric Van Hensbergen 11212bad8471SEric Van Hensbergen if (iattr->ia_valid & ATTR_SIZE) 1122531b1094SLatchesar Ionkov wstat.length = iattr->ia_size; 11232bad8471SEric Van Hensbergen 1124dd6102fbSSripathi Kodi if (v9fs_proto_dotu(v9ses)) { 1125531b1094SLatchesar Ionkov if (iattr->ia_valid & ATTR_UID) 1126531b1094SLatchesar Ionkov wstat.n_uid = iattr->ia_uid; 11272bad8471SEric Van Hensbergen 1128531b1094SLatchesar Ionkov if (iattr->ia_valid & ATTR_GID) 1129531b1094SLatchesar Ionkov wstat.n_gid = iattr->ia_gid; 11302bad8471SEric Van Hensbergen } 1131059c138bSAneesh Kumar K.V 11323dc5436aSAneesh Kumar K.V /* Write all dirty data */ 1133e36cb0b8SDavid Howells if (d_is_reg(dentry)) 113424e42e32SDavid Howells filemap_write_and_wait(inode->i_mapping); 11353dc5436aSAneesh Kumar K.V 1136f10fc50fSAneesh Kumar K.V retval = p9_client_wstat(fid, &wstat); 11376636b6dcSJianyong Wu 11386636b6dcSJianyong Wu if (use_dentry) 11396636b6dcSJianyong Wu p9_client_clunk(fid); 11406636b6dcSJianyong Wu 1141f10fc50fSAneesh Kumar K.V if (retval < 0) 1142f10fc50fSAneesh Kumar K.V return retval; 1143059c138bSAneesh Kumar K.V 1144059c138bSAneesh Kumar K.V if ((iattr->ia_valid & ATTR_SIZE) && 114524e42e32SDavid Howells iattr->ia_size != i_size_read(inode)) { 114624e42e32SDavid Howells truncate_setsize(inode, iattr->ia_size); 114724e42e32SDavid Howells fscache_resize_cookie(v9fs_inode_cookie(v9inode), iattr->ia_size); 114824e42e32SDavid Howells } 1149059c138bSAneesh Kumar K.V 115024e42e32SDavid Howells v9fs_invalidate_inode_attr(inode); 11511025774cSChristoph Hellwig 115224e42e32SDavid Howells setattr_copy(&init_user_ns, inode, iattr); 115324e42e32SDavid Howells mark_inode_dirty(inode); 11541025774cSChristoph Hellwig return 0; 11552bad8471SEric Van Hensbergen } 11562bad8471SEric Van Hensbergen 11572bad8471SEric Van Hensbergen /** 1158531b1094SLatchesar Ionkov * v9fs_stat2inode - populate an inode structure with mistat info 1159531b1094SLatchesar Ionkov * @stat: Plan 9 metadata (mistat) structure 11602bad8471SEric Van Hensbergen * @inode: inode to populate 11612bad8471SEric Van Hensbergen * @sb: superblock of filesystem 11625e3cc1eeSHou Tao * @flags: control flags (e.g. V9FS_STAT2INODE_KEEP_ISIZE) 11632bad8471SEric Van Hensbergen * 11642bad8471SEric Van Hensbergen */ 11652bad8471SEric Van Hensbergen 11662bad8471SEric Van Hensbergen void 116751a87c55SEric Van Hensbergen v9fs_stat2inode(struct p9_wstat *stat, struct inode *inode, 11685e3cc1eeSHou Tao struct super_block *sb, unsigned int flags) 11692bad8471SEric Van Hensbergen { 11703eda0de6SAl Viro umode_t mode; 11712bad8471SEric Van Hensbergen struct v9fs_session_info *v9ses = sb->s_fs_info; 1172b3cbea03SAneesh Kumar K.V struct v9fs_inode *v9inode = V9FS_I(inode); 11732bad8471SEric Van Hensbergen 1174bfe86848SMiklos Szeredi set_nlink(inode, 1); 11752bad8471SEric Van Hensbergen 1176531b1094SLatchesar Ionkov inode->i_atime.tv_sec = stat->atime; 1177531b1094SLatchesar Ionkov inode->i_mtime.tv_sec = stat->mtime; 1178531b1094SLatchesar Ionkov inode->i_ctime.tv_sec = stat->mtime; 11792bad8471SEric Van Hensbergen 1180bd32b82dSLatchesar Ionkov inode->i_uid = v9ses->dfltuid; 1181bd32b82dSLatchesar Ionkov inode->i_gid = v9ses->dfltgid; 11822bad8471SEric Van Hensbergen 1183dd6102fbSSripathi Kodi if (v9fs_proto_dotu(v9ses)) { 1184531b1094SLatchesar Ionkov inode->i_uid = stat->n_uid; 1185531b1094SLatchesar Ionkov inode->i_gid = stat->n_gid; 1186531b1094SLatchesar Ionkov } 11875717144aSAneesh Kumar K.V if ((S_ISREG(inode->i_mode)) || (S_ISDIR(inode->i_mode))) { 11889652c732SAl Viro if (v9fs_proto_dotu(v9ses)) { 11899652c732SAl Viro unsigned int i_nlink; 11905717144aSAneesh Kumar K.V /* 11919652c732SAl Viro * Hadlink support got added later to the .u extension. 11929652c732SAl Viro * So there can be a server out there that doesn't 11939652c732SAl Viro * support this even with .u extension. That would 11949652c732SAl Viro * just leave us with stat->extension being an empty 11959652c732SAl Viro * string, though. 11965717144aSAneesh Kumar K.V */ 11975717144aSAneesh Kumar K.V /* HARDLINKCOUNT %u */ 11989652c732SAl Viro if (sscanf(stat->extension, 11999652c732SAl Viro " HARDLINKCOUNT %u", &i_nlink) == 1) 1200bfe86848SMiklos Szeredi set_nlink(inode, i_nlink); 12015717144aSAneesh Kumar K.V } 12025717144aSAneesh Kumar K.V } 1203df345c67SAneesh Kumar K.V mode = p9mode2perm(v9ses, stat); 120445089142SAneesh Kumar K.V mode |= inode->i_mode & ~S_IALLUGO; 120545089142SAneesh Kumar K.V inode->i_mode = mode; 12062bad8471SEric Van Hensbergen 12075e3cc1eeSHou Tao if (!(flags & V9FS_STAT2INODE_KEEP_ISIZE)) 12085e3cc1eeSHou Tao v9fs_i_size_write(inode, stat->length); 1209bd238fb4SLatchesar Ionkov /* not real number of blocks, but 512 byte ones ... */ 12105e3cc1eeSHou Tao inode->i_blocks = (stat->length + 512 - 1) >> 9; 1211b3cbea03SAneesh Kumar K.V v9inode->cache_validity &= ~V9FS_INO_INVALID_ATTR; 12122bad8471SEric Van Hensbergen } 12132bad8471SEric Van Hensbergen 12142bad8471SEric Van Hensbergen /** 12152bad8471SEric Van Hensbergen * v9fs_qid2ino - convert qid into inode number 12162bad8471SEric Van Hensbergen * @qid: qid to hash 12172bad8471SEric Van Hensbergen * 12182bad8471SEric Van Hensbergen * BUG: potential for inode number collisions? 12192bad8471SEric Van Hensbergen */ 12202bad8471SEric Van Hensbergen 1221bd238fb4SLatchesar Ionkov ino_t v9fs_qid2ino(struct p9_qid *qid) 12222bad8471SEric Van Hensbergen { 12232bad8471SEric Van Hensbergen u64 path = qid->path + 2; 12242bad8471SEric Van Hensbergen ino_t i = 0; 12252bad8471SEric Van Hensbergen 12262bad8471SEric Van Hensbergen if (sizeof(ino_t) == sizeof(path)) 12272bad8471SEric Van Hensbergen memcpy(&i, &path, sizeof(ino_t)); 12282bad8471SEric Van Hensbergen else 12292bad8471SEric Van Hensbergen i = (ino_t) (path ^ (path >> 32)); 12302bad8471SEric Van Hensbergen 12312bad8471SEric Van Hensbergen return i; 12322bad8471SEric Van Hensbergen } 12332bad8471SEric Van Hensbergen 12342bad8471SEric Van Hensbergen /** 12356b255391SAl Viro * v9fs_vfs_get_link - follow a symlink path 12362bad8471SEric Van Hensbergen * @dentry: dentry for symlink 12376b255391SAl Viro * @inode: inode for symlink 1238fceef393SAl Viro * @done: delayed call for when we are done with the return value 12392bad8471SEric Van Hensbergen */ 12402bad8471SEric Van Hensbergen 12416b255391SAl Viro static const char *v9fs_vfs_get_link(struct dentry *dentry, 1242fceef393SAl Viro struct inode *inode, 1243fceef393SAl Viro struct delayed_call *done) 12442bad8471SEric Van Hensbergen { 12456b255391SAl Viro struct v9fs_session_info *v9ses; 12466b255391SAl Viro struct p9_fid *fid; 124790e4fc88SAl Viro struct p9_wstat *st; 1248680baacbSAl Viro char *res; 12492bad8471SEric Van Hensbergen 12506b255391SAl Viro if (!dentry) 12516b255391SAl Viro return ERR_PTR(-ECHILD); 12526b255391SAl Viro 12536b255391SAl Viro v9ses = v9fs_dentry2v9ses(dentry); 1254*e5690f26SDominique Martinet if (!v9fs_proto_dotu(v9ses)) 1255*e5690f26SDominique Martinet return ERR_PTR(-EBADF); 1256*e5690f26SDominique Martinet 12574b8e9923SAl Viro p9_debug(P9_DEBUG_VFS, "%pd\n", dentry); 1258*e5690f26SDominique Martinet fid = v9fs_fid_lookup(dentry); 12592bad8471SEric Van Hensbergen 126090e4fc88SAl Viro if (IS_ERR(fid)) 126190e4fc88SAl Viro return ERR_CAST(fid); 12622bad8471SEric Van Hensbergen 126390e4fc88SAl Viro st = p9_client_stat(fid); 12646636b6dcSJianyong Wu p9_client_clunk(fid); 126590e4fc88SAl Viro if (IS_ERR(st)) 126690e4fc88SAl Viro return ERR_CAST(st); 126790e4fc88SAl Viro 126890e4fc88SAl Viro if (!(st->mode & P9_DMSYMLINK)) { 126990e4fc88SAl Viro p9stat_free(st); 127090e4fc88SAl Viro kfree(st); 127190e4fc88SAl Viro return ERR_PTR(-EINVAL); 12722bad8471SEric Van Hensbergen } 1273680baacbSAl Viro res = st->extension; 127490e4fc88SAl Viro st->extension = NULL; 1275680baacbSAl Viro if (strlen(res) >= PATH_MAX) 1276680baacbSAl Viro res[PATH_MAX - 1] = '\0'; 1277680baacbSAl Viro 127890e4fc88SAl Viro p9stat_free(st); 127990e4fc88SAl Viro kfree(st); 1280fceef393SAl Viro set_delayed_call(done, kfree_link, res); 1281fceef393SAl Viro return res; 12822bad8471SEric Van Hensbergen } 12832bad8471SEric Van Hensbergen 12842bad8471SEric Van Hensbergen /** 1285ee443996SEric Van Hensbergen * v9fs_vfs_mkspecial - create a special file 1286ee443996SEric Van Hensbergen * @dir: inode to create special file in 1287ee443996SEric Van Hensbergen * @dentry: dentry to create 1288fd2916bdSFabian Frederick * @perm: mode to create special file 1289ee443996SEric Van Hensbergen * @extension: 9p2000.u format extension string representing special file 1290ee443996SEric Van Hensbergen * 1291ee443996SEric Van Hensbergen */ 1292ee443996SEric Van Hensbergen 1293531b1094SLatchesar Ionkov static int v9fs_vfs_mkspecial(struct inode *dir, struct dentry *dentry, 1294c2837de7SAl Viro u32 perm, const char *extension) 1295531b1094SLatchesar Ionkov { 1296bd238fb4SLatchesar Ionkov struct p9_fid *fid; 1297d28c61f0SAneesh Kumar K.V struct v9fs_session_info *v9ses; 1298531b1094SLatchesar Ionkov 12996a3124a3SLatchesar Ionkov v9ses = v9fs_inode2v9ses(dir); 1300dd6102fbSSripathi Kodi if (!v9fs_proto_dotu(v9ses)) { 13015d385153SJoe Perches p9_debug(P9_DEBUG_ERROR, "not extended\n"); 13026a3124a3SLatchesar Ionkov return -EPERM; 1303531b1094SLatchesar Ionkov } 1304531b1094SLatchesar Ionkov 1305bd238fb4SLatchesar Ionkov fid = v9fs_create(v9ses, dir, dentry, (char *) extension, perm, 1306bd238fb4SLatchesar Ionkov P9_OREAD); 1307bd238fb4SLatchesar Ionkov if (IS_ERR(fid)) 1308bd238fb4SLatchesar Ionkov return PTR_ERR(fid); 1309da977b2cSEric Van Hensbergen 1310d28c61f0SAneesh Kumar K.V v9fs_invalidate_inode_attr(dir); 1311bd238fb4SLatchesar Ionkov p9_client_clunk(fid); 13126a3124a3SLatchesar Ionkov return 0; 1313531b1094SLatchesar Ionkov } 1314531b1094SLatchesar Ionkov 1315531b1094SLatchesar Ionkov /** 1316531b1094SLatchesar Ionkov * v9fs_vfs_symlink - helper function to create symlinks 1317bc868036SDavid Howells * @mnt_userns: The user namespace of the mount 1318531b1094SLatchesar Ionkov * @dir: directory inode containing symlink 1319531b1094SLatchesar Ionkov * @dentry: dentry for symlink 1320531b1094SLatchesar Ionkov * @symname: symlink data 1321531b1094SLatchesar Ionkov * 1322ee443996SEric Van Hensbergen * See Also: 9P2000.u RFC for more information 1323531b1094SLatchesar Ionkov * 1324531b1094SLatchesar Ionkov */ 1325531b1094SLatchesar Ionkov 1326531b1094SLatchesar Ionkov static int 1327549c7297SChristian Brauner v9fs_vfs_symlink(struct user_namespace *mnt_userns, struct inode *dir, 1328549c7297SChristian Brauner struct dentry *dentry, const char *symname) 1329531b1094SLatchesar Ionkov { 13304b8e9923SAl Viro p9_debug(P9_DEBUG_VFS, " %lu,%pd,%s\n", 13314b8e9923SAl Viro dir->i_ino, dentry, symname); 1332531b1094SLatchesar Ionkov 1333c2837de7SAl Viro return v9fs_vfs_mkspecial(dir, dentry, P9_DMSYMLINK, symname); 1334531b1094SLatchesar Ionkov } 1335531b1094SLatchesar Ionkov 1336b46c267eSAl Viro #define U32_MAX_DIGITS 10 1337b46c267eSAl Viro 13382bad8471SEric Van Hensbergen /** 13392bad8471SEric Van Hensbergen * v9fs_vfs_link - create a hardlink 13402bad8471SEric Van Hensbergen * @old_dentry: dentry for file to link to 13412bad8471SEric Van Hensbergen * @dir: inode destination for new link 134273c592b9SEric Van Hensbergen * @dentry: dentry for link 13432bad8471SEric Van Hensbergen * 13442bad8471SEric Van Hensbergen */ 13452bad8471SEric Van Hensbergen 13462bad8471SEric Van Hensbergen static int 13472bad8471SEric Van Hensbergen v9fs_vfs_link(struct dentry *old_dentry, struct inode *dir, 13482bad8471SEric Van Hensbergen struct dentry *dentry) 13492bad8471SEric Van Hensbergen { 1350531b1094SLatchesar Ionkov int retval; 1351b46c267eSAl Viro char name[1 + U32_MAX_DIGITS + 2]; /* sign + number + \n + \0 */ 1352d28c61f0SAneesh Kumar K.V struct p9_fid *oldfid; 13532bad8471SEric Van Hensbergen 13544b8e9923SAl Viro p9_debug(P9_DEBUG_VFS, " %lu,%pd,%pd\n", 13554b8e9923SAl Viro dir->i_ino, dentry, old_dentry); 13562bad8471SEric Van Hensbergen 1357da977b2cSEric Van Hensbergen oldfid = v9fs_fid_clone(old_dentry); 1358da977b2cSEric Van Hensbergen if (IS_ERR(oldfid)) 1359da977b2cSEric Van Hensbergen return PTR_ERR(oldfid); 13602bad8471SEric Van Hensbergen 136116cce6d2SLatchesar Ionkov sprintf(name, "%d\n", oldfid->fid); 1362bd238fb4SLatchesar Ionkov retval = v9fs_vfs_mkspecial(dir, dentry, P9_DMLINK, name); 1363c06c066aSAneesh Kumar K.V if (!retval) { 13642b0143b5SDavid Howells v9fs_refresh_inode(oldfid, d_inode(old_dentry)); 1365d28c61f0SAneesh Kumar K.V v9fs_invalidate_inode_attr(dir); 1366c06c066aSAneesh Kumar K.V } 1367bd238fb4SLatchesar Ionkov p9_client_clunk(oldfid); 13682bad8471SEric Van Hensbergen return retval; 13692bad8471SEric Van Hensbergen } 13702bad8471SEric Van Hensbergen 13712bad8471SEric Van Hensbergen /** 13722bad8471SEric Van Hensbergen * v9fs_vfs_mknod - create a special file 1373bc868036SDavid Howells * @mnt_userns: The user namespace of the mount 13742bad8471SEric Van Hensbergen * @dir: inode destination for new link 13752bad8471SEric Van Hensbergen * @dentry: dentry for file 13762bad8471SEric Van Hensbergen * @mode: mode for creation 1377ee443996SEric Van Hensbergen * @rdev: device associated with special file 13782bad8471SEric Van Hensbergen * 13792bad8471SEric Van Hensbergen */ 13802bad8471SEric Van Hensbergen 13812bad8471SEric Van Hensbergen static int 1382549c7297SChristian Brauner v9fs_vfs_mknod(struct user_namespace *mnt_userns, struct inode *dir, 1383549c7297SChristian Brauner struct dentry *dentry, umode_t mode, dev_t rdev) 13842bad8471SEric Van Hensbergen { 1385c2837de7SAl Viro struct v9fs_session_info *v9ses = v9fs_inode2v9ses(dir); 1386531b1094SLatchesar Ionkov int retval; 1387b46c267eSAl Viro char name[2 + U32_MAX_DIGITS + 1 + U32_MAX_DIGITS + 1]; 1388c2837de7SAl Viro u32 perm; 13892bad8471SEric Van Hensbergen 13906e195b0fSDominique Martinet p9_debug(P9_DEBUG_VFS, " %lu,%pd mode: %x MAJOR: %u MINOR: %u\n", 13914b8e9923SAl Viro dir->i_ino, dentry, mode, 13925d385153SJoe Perches MAJOR(rdev), MINOR(rdev)); 13932bad8471SEric Van Hensbergen 13942bad8471SEric Van Hensbergen /* build extension */ 13952bad8471SEric Van Hensbergen if (S_ISBLK(mode)) 1396531b1094SLatchesar Ionkov sprintf(name, "b %u %u", MAJOR(rdev), MINOR(rdev)); 13972bad8471SEric Van Hensbergen else if (S_ISCHR(mode)) 1398531b1094SLatchesar Ionkov sprintf(name, "c %u %u", MAJOR(rdev), MINOR(rdev)); 1399b46c267eSAl Viro else 1400531b1094SLatchesar Ionkov *name = 0; 14012bad8471SEric Van Hensbergen 1402c2837de7SAl Viro perm = unixmode2p9mode(v9ses, mode); 1403c2837de7SAl Viro retval = v9fs_vfs_mkspecial(dir, dentry, perm, name); 14042bad8471SEric Van Hensbergen 14052bad8471SEric Van Hensbergen return retval; 14062bad8471SEric Van Hensbergen } 14072bad8471SEric Van Hensbergen 1408b3cbea03SAneesh Kumar K.V int v9fs_refresh_inode(struct p9_fid *fid, struct inode *inode) 1409b3cbea03SAneesh Kumar K.V { 141045089142SAneesh Kumar K.V int umode; 141145089142SAneesh Kumar K.V dev_t rdev; 1412b3cbea03SAneesh Kumar K.V struct p9_wstat *st; 1413b3cbea03SAneesh Kumar K.V struct v9fs_session_info *v9ses; 14145e3cc1eeSHou Tao unsigned int flags; 1415b3cbea03SAneesh Kumar K.V 1416b3cbea03SAneesh Kumar K.V v9ses = v9fs_inode2v9ses(inode); 1417b3cbea03SAneesh Kumar K.V st = p9_client_stat(fid); 1418b3cbea03SAneesh Kumar K.V if (IS_ERR(st)) 1419b3cbea03SAneesh Kumar K.V return PTR_ERR(st); 142045089142SAneesh Kumar K.V /* 142145089142SAneesh Kumar K.V * Don't update inode if the file type is different 142245089142SAneesh Kumar K.V */ 142345089142SAneesh Kumar K.V umode = p9mode2unixmode(v9ses, st, &rdev); 14246e3e2c43SAl Viro if (inode_wrong_type(inode, umode)) 142545089142SAneesh Kumar K.V goto out; 1426b3cbea03SAneesh Kumar K.V 1427b3cbea03SAneesh Kumar K.V /* 1428b3cbea03SAneesh Kumar K.V * We don't want to refresh inode->i_size, 1429b3cbea03SAneesh Kumar K.V * because we may have cached data 1430b3cbea03SAneesh Kumar K.V */ 14315e3cc1eeSHou Tao flags = (v9ses->cache == CACHE_LOOSE || v9ses->cache == CACHE_FSCACHE) ? 14325e3cc1eeSHou Tao V9FS_STAT2INODE_KEEP_ISIZE : 0; 14335e3cc1eeSHou Tao v9fs_stat2inode(st, inode, inode->i_sb, flags); 143445089142SAneesh Kumar K.V out: 1435b3cbea03SAneesh Kumar K.V p9stat_free(st); 1436b3cbea03SAneesh Kumar K.V kfree(st); 1437b3cbea03SAneesh Kumar K.V return 0; 1438b3cbea03SAneesh Kumar K.V } 1439b3cbea03SAneesh Kumar K.V 14409b6533c9SSripathi Kodi static const struct inode_operations v9fs_dir_inode_operations_dotu = { 14419b6533c9SSripathi Kodi .create = v9fs_vfs_create, 14429b6533c9SSripathi Kodi .lookup = v9fs_vfs_lookup, 1443e43ae79cSMiklos Szeredi .atomic_open = v9fs_vfs_atomic_open, 14449b6533c9SSripathi Kodi .symlink = v9fs_vfs_symlink, 144550cc42ffSVenkateswararao Jujjuri (JV) .link = v9fs_vfs_link, 14469b6533c9SSripathi Kodi .unlink = v9fs_vfs_unlink, 14479b6533c9SSripathi Kodi .mkdir = v9fs_vfs_mkdir, 14489b6533c9SSripathi Kodi .rmdir = v9fs_vfs_rmdir, 14491d76e313SAneesh Kumar K.V .mknod = v9fs_vfs_mknod, 14509b6533c9SSripathi Kodi .rename = v9fs_vfs_rename, 14519b6533c9SSripathi Kodi .getattr = v9fs_vfs_getattr, 14529b6533c9SSripathi Kodi .setattr = v9fs_vfs_setattr, 14539b6533c9SSripathi Kodi }; 14549b6533c9SSripathi Kodi 1455754661f1SArjan van de Ven static const struct inode_operations v9fs_dir_inode_operations = { 1456b501611aSEric Van Hensbergen .create = v9fs_vfs_create, 1457b501611aSEric Van Hensbergen .lookup = v9fs_vfs_lookup, 1458e43ae79cSMiklos Szeredi .atomic_open = v9fs_vfs_atomic_open, 1459b501611aSEric Van Hensbergen .unlink = v9fs_vfs_unlink, 1460b501611aSEric Van Hensbergen .mkdir = v9fs_vfs_mkdir, 1461b501611aSEric Van Hensbergen .rmdir = v9fs_vfs_rmdir, 1462b501611aSEric Van Hensbergen .mknod = v9fs_vfs_mknod, 1463b501611aSEric Van Hensbergen .rename = v9fs_vfs_rename, 1464b501611aSEric Van Hensbergen .getattr = v9fs_vfs_getattr, 1465b501611aSEric Van Hensbergen .setattr = v9fs_vfs_setattr, 1466b501611aSEric Van Hensbergen }; 1467b501611aSEric Van Hensbergen 1468754661f1SArjan van de Ven static const struct inode_operations v9fs_file_inode_operations = { 14692bad8471SEric Van Hensbergen .getattr = v9fs_vfs_getattr, 14702bad8471SEric Van Hensbergen .setattr = v9fs_vfs_setattr, 14712bad8471SEric Van Hensbergen }; 14722bad8471SEric Van Hensbergen 1473754661f1SArjan van de Ven static const struct inode_operations v9fs_symlink_inode_operations = { 14746b255391SAl Viro .get_link = v9fs_vfs_get_link, 14752bad8471SEric Van Hensbergen .getattr = v9fs_vfs_getattr, 14762bad8471SEric Van Hensbergen .setattr = v9fs_vfs_setattr, 14772bad8471SEric Van Hensbergen }; 14789b6533c9SSripathi Kodi 1479