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 2312ed0b757SLi Heng v9inode = kmem_cache_alloc(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); 237a78ce05dSAneesh Kumar K.V return &v9inode->vfs_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 250*bc899ee1SDavid Howells /* 251*bc899ee1SDavid Howells * Set parameters for the netfs library 252*bc899ee1SDavid Howells */ 253*bc899ee1SDavid Howells static void v9fs_set_netfs_context(struct inode *inode) 254*bc899ee1SDavid Howells { 255*bc899ee1SDavid Howells netfs_i_context_init(inode, &v9fs_req_ops); 256*bc899ee1SDavid Howells } 257*bc899ee1SDavid Howells 2585ffc0cb3SAneesh Kumar K.V int v9fs_init_inode(struct v9fs_session_info *v9ses, 2593eda0de6SAl Viro struct inode *inode, umode_t mode, dev_t rdev) 2602bad8471SEric Van Hensbergen { 2615ffc0cb3SAneesh Kumar K.V int err = 0; 2622bb54115SAbhishek Kulkarni 26321cb47beSChristian Brauner inode_init_owner(&init_user_ns, inode, NULL, mode); 2642bad8471SEric Van Hensbergen inode->i_blocks = 0; 26545089142SAneesh Kumar K.V inode->i_rdev = rdev; 266078cd827SDeepa Dinamani inode->i_atime = inode->i_mtime = inode->i_ctime = current_time(inode); 267147b31cfSEric Van Hensbergen inode->i_mapping->a_ops = &v9fs_addr_operations; 268987a6485SGreg Kurz inode->i_private = NULL; 2692bad8471SEric Van Hensbergen 2702bad8471SEric Van Hensbergen switch (mode & S_IFMT) { 2712bad8471SEric Van Hensbergen case S_IFIFO: 2722bad8471SEric Van Hensbergen case S_IFBLK: 2732bad8471SEric Van Hensbergen case S_IFCHR: 2742bad8471SEric Van Hensbergen case S_IFSOCK: 2754b43516aSM. Mohan Kumar if (v9fs_proto_dotl(v9ses)) { 2764b43516aSM. Mohan Kumar inode->i_op = &v9fs_file_inode_operations_dotl; 2774b43516aSM. Mohan Kumar } else if (v9fs_proto_dotu(v9ses)) { 2784b43516aSM. Mohan Kumar inode->i_op = &v9fs_file_inode_operations; 2794b43516aSM. Mohan Kumar } else { 2805d385153SJoe Perches p9_debug(P9_DEBUG_ERROR, 281bd238fb4SLatchesar Ionkov "special files without extended mode\n"); 2822bb54115SAbhishek Kulkarni err = -EINVAL; 2832bb54115SAbhishek Kulkarni goto error; 284b501611aSEric Van Hensbergen } 2852bb54115SAbhishek Kulkarni init_special_inode(inode, inode->i_mode, inode->i_rdev); 2865d58bec5SEric Van Hensbergen break; 2872bad8471SEric Van Hensbergen case S_IFREG: 2889b6533c9SSripathi Kodi if (v9fs_proto_dotl(v9ses)) { 2899b6533c9SSripathi Kodi inode->i_op = &v9fs_file_inode_operations_dotl; 290fb89b45cSDominique Martinet if (v9ses->cache == CACHE_LOOSE || 291fb89b45cSDominique Martinet v9ses->cache == CACHE_FSCACHE) 29229236f4eSAneesh Kumar K.V inode->i_fop = 29329236f4eSAneesh Kumar K.V &v9fs_cached_file_operations_dotl; 294fb89b45cSDominique Martinet else if (v9ses->cache == CACHE_MMAP) 295fb89b45cSDominique Martinet inode->i_fop = &v9fs_mmap_file_operations_dotl; 29629236f4eSAneesh Kumar K.V else 2979b6533c9SSripathi Kodi inode->i_fop = &v9fs_file_operations_dotl; 2989b6533c9SSripathi Kodi } else { 2992bad8471SEric Van Hensbergen inode->i_op = &v9fs_file_inode_operations; 300fb89b45cSDominique Martinet if (v9ses->cache == CACHE_LOOSE || 301fb89b45cSDominique Martinet v9ses->cache == CACHE_FSCACHE) 302fb89b45cSDominique Martinet inode->i_fop = 303fb89b45cSDominique Martinet &v9fs_cached_file_operations; 304fb89b45cSDominique Martinet else if (v9ses->cache == CACHE_MMAP) 305fb89b45cSDominique Martinet inode->i_fop = &v9fs_mmap_file_operations; 30629236f4eSAneesh Kumar K.V else 3072bad8471SEric Van Hensbergen inode->i_fop = &v9fs_file_operations; 3089b6533c9SSripathi Kodi } 3099b6533c9SSripathi Kodi 3102bad8471SEric Van Hensbergen break; 311b501611aSEric Van Hensbergen case S_IFLNK: 3129b6533c9SSripathi Kodi if (!v9fs_proto_dotu(v9ses) && !v9fs_proto_dotl(v9ses)) { 3135d385153SJoe Perches p9_debug(P9_DEBUG_ERROR, 3145d385153SJoe Perches "extended modes used with legacy protocol\n"); 3152bb54115SAbhishek Kulkarni err = -EINVAL; 3162bb54115SAbhishek Kulkarni goto error; 317b501611aSEric Van Hensbergen } 3189b6533c9SSripathi Kodi 3199b6533c9SSripathi Kodi if (v9fs_proto_dotl(v9ses)) 3209b6533c9SSripathi Kodi inode->i_op = &v9fs_symlink_inode_operations_dotl; 3219b6533c9SSripathi Kodi else 322b501611aSEric Van Hensbergen inode->i_op = &v9fs_symlink_inode_operations; 3239b6533c9SSripathi Kodi 324b501611aSEric Van Hensbergen break; 3252bad8471SEric Van Hensbergen case S_IFDIR: 326d8c76e6fSDave Hansen inc_nlink(inode); 3279b6533c9SSripathi Kodi if (v9fs_proto_dotl(v9ses)) 3289b6533c9SSripathi Kodi inode->i_op = &v9fs_dir_inode_operations_dotl; 3299b6533c9SSripathi Kodi else if (v9fs_proto_dotu(v9ses)) 3309b6533c9SSripathi Kodi inode->i_op = &v9fs_dir_inode_operations_dotu; 331b501611aSEric Van Hensbergen else 3322bad8471SEric Van Hensbergen inode->i_op = &v9fs_dir_inode_operations; 3339b6533c9SSripathi Kodi 3349b6533c9SSripathi Kodi if (v9fs_proto_dotl(v9ses)) 3359b6533c9SSripathi Kodi inode->i_fop = &v9fs_dir_operations_dotl; 3369b6533c9SSripathi Kodi else 3372bad8471SEric Van Hensbergen inode->i_fop = &v9fs_dir_operations; 3389b6533c9SSripathi Kodi 3392bad8471SEric Van Hensbergen break; 3402bad8471SEric Van Hensbergen default: 341609eac1cSLinus Torvalds p9_debug(P9_DEBUG_ERROR, "BAD mode 0x%hx S_IFMT 0x%x\n", 3422bad8471SEric Van Hensbergen mode, mode & S_IFMT); 3432bb54115SAbhishek Kulkarni err = -EINVAL; 3442bb54115SAbhishek Kulkarni goto error; 3452bad8471SEric Van Hensbergen } 346*bc899ee1SDavid Howells 347*bc899ee1SDavid Howells v9fs_set_netfs_context(inode); 3482bb54115SAbhishek Kulkarni error: 3495ffc0cb3SAneesh Kumar K.V return err; 3505ffc0cb3SAneesh Kumar K.V 3515ffc0cb3SAneesh Kumar K.V } 3525ffc0cb3SAneesh Kumar K.V 3535ffc0cb3SAneesh Kumar K.V /** 3545ffc0cb3SAneesh Kumar K.V * v9fs_get_inode - helper function to setup an inode 3555ffc0cb3SAneesh Kumar K.V * @sb: superblock 3565ffc0cb3SAneesh Kumar K.V * @mode: mode to setup inode with 357bc868036SDavid Howells * @rdev: The device numbers to set 3585ffc0cb3SAneesh Kumar K.V */ 3595ffc0cb3SAneesh Kumar K.V 3603eda0de6SAl Viro struct inode *v9fs_get_inode(struct super_block *sb, umode_t mode, dev_t rdev) 3615ffc0cb3SAneesh Kumar K.V { 3625ffc0cb3SAneesh Kumar K.V int err; 3635ffc0cb3SAneesh Kumar K.V struct inode *inode; 3645ffc0cb3SAneesh Kumar K.V struct v9fs_session_info *v9ses = sb->s_fs_info; 3655ffc0cb3SAneesh Kumar K.V 366609eac1cSLinus Torvalds p9_debug(P9_DEBUG_VFS, "super block: %p mode: %ho\n", sb, mode); 3675ffc0cb3SAneesh Kumar K.V 3685ffc0cb3SAneesh Kumar K.V inode = new_inode(sb); 3695ffc0cb3SAneesh Kumar K.V if (!inode) { 3705d385153SJoe Perches pr_warn("%s (%d): Problem allocating inode\n", 3715d385153SJoe Perches __func__, task_pid_nr(current)); 3725ffc0cb3SAneesh Kumar K.V return ERR_PTR(-ENOMEM); 3735ffc0cb3SAneesh Kumar K.V } 37445089142SAneesh Kumar K.V err = v9fs_init_inode(v9ses, inode, mode, rdev); 3755ffc0cb3SAneesh Kumar K.V if (err) { 3762bb54115SAbhishek Kulkarni iput(inode); 3772bb54115SAbhishek Kulkarni return ERR_PTR(err); 3782bad8471SEric Van Hensbergen } 3795ffc0cb3SAneesh Kumar K.V return inode; 3805ffc0cb3SAneesh Kumar K.V } 3812bad8471SEric Van Hensbergen 38260e78d2cSAbhishek Kulkarni /** 383bc868036SDavid Howells * v9fs_evict_inode - Remove an inode from the inode cache 38460e78d2cSAbhishek Kulkarni * @inode: inode to release 38560e78d2cSAbhishek Kulkarni * 38660e78d2cSAbhishek Kulkarni */ 387b57922d9SAl Viro void v9fs_evict_inode(struct inode *inode) 38860e78d2cSAbhishek Kulkarni { 3896b39f6d2SAneesh Kumar K.V struct v9fs_inode *v9inode = V9FS_I(inode); 39093c84614SDavid Howells __le32 version; 3916b39f6d2SAneesh Kumar K.V 3924ad78628SAl Viro truncate_inode_pages_final(&inode->i_data); 39393c84614SDavid Howells version = cpu_to_le32(v9inode->qid.version); 39493c84614SDavid Howells fscache_clear_inode_writeback(v9fs_inode_cookie(v9inode), inode, 39593c84614SDavid Howells &version); 396dbd5768fSJan Kara clear_inode(inode); 3974ad78628SAl Viro filemap_fdatawrite(&inode->i_data); 39860e78d2cSAbhishek Kulkarni 39924e42e32SDavid Howells fscache_relinquish_cookie(v9fs_inode_cookie(v9inode), false); 4006b39f6d2SAneesh Kumar K.V /* clunk the fid stashed in writeback_fid */ 4016b39f6d2SAneesh Kumar K.V if (v9inode->writeback_fid) { 4026b39f6d2SAneesh Kumar K.V p9_client_clunk(v9inode->writeback_fid); 4036b39f6d2SAneesh Kumar K.V v9inode->writeback_fid = NULL; 4043cf387d7SAneesh Kumar K.V } 40560e78d2cSAbhishek Kulkarni } 40660e78d2cSAbhishek Kulkarni 407fd2421f5SAneesh Kumar K.V static int v9fs_test_inode(struct inode *inode, void *data) 408fd2421f5SAneesh Kumar K.V { 409fd2421f5SAneesh Kumar K.V int umode; 41045089142SAneesh Kumar K.V dev_t rdev; 411fd2421f5SAneesh Kumar K.V struct v9fs_inode *v9inode = V9FS_I(inode); 412fd2421f5SAneesh Kumar K.V struct p9_wstat *st = (struct p9_wstat *)data; 413fd2421f5SAneesh Kumar K.V struct v9fs_session_info *v9ses = v9fs_inode2v9ses(inode); 414fd2421f5SAneesh Kumar K.V 41545089142SAneesh Kumar K.V umode = p9mode2unixmode(v9ses, st, &rdev); 416fd2421f5SAneesh Kumar K.V /* don't match inode of different type */ 4176e3e2c43SAl Viro if (inode_wrong_type(inode, umode)) 418fd2421f5SAneesh Kumar K.V return 0; 419fd2421f5SAneesh Kumar K.V 420fd2421f5SAneesh Kumar K.V /* compare qid details */ 421fd2421f5SAneesh Kumar K.V if (memcmp(&v9inode->qid.version, 422fd2421f5SAneesh Kumar K.V &st->qid.version, sizeof(v9inode->qid.version))) 423fd2421f5SAneesh Kumar K.V return 0; 424fd2421f5SAneesh Kumar K.V 425fd2421f5SAneesh Kumar K.V if (v9inode->qid.type != st->qid.type) 426fd2421f5SAneesh Kumar K.V return 0; 4278ee03163STuomas Tynkkynen 4288ee03163STuomas Tynkkynen if (v9inode->qid.path != st->qid.path) 4298ee03163STuomas Tynkkynen return 0; 430fd2421f5SAneesh Kumar K.V return 1; 431fd2421f5SAneesh Kumar K.V } 432fd2421f5SAneesh Kumar K.V 433ed80fcfaSAneesh Kumar K.V static int v9fs_test_new_inode(struct inode *inode, void *data) 434ed80fcfaSAneesh Kumar K.V { 435ed80fcfaSAneesh Kumar K.V return 0; 436ed80fcfaSAneesh Kumar K.V } 437ed80fcfaSAneesh Kumar K.V 438fd2421f5SAneesh Kumar K.V static int v9fs_set_inode(struct inode *inode, void *data) 439fd2421f5SAneesh Kumar K.V { 440fd2421f5SAneesh Kumar K.V struct v9fs_inode *v9inode = V9FS_I(inode); 441fd2421f5SAneesh Kumar K.V struct p9_wstat *st = (struct p9_wstat *)data; 442fd2421f5SAneesh Kumar K.V 443fd2421f5SAneesh Kumar K.V memcpy(&v9inode->qid, &st->qid, sizeof(st->qid)); 444fd2421f5SAneesh Kumar K.V return 0; 445fd2421f5SAneesh Kumar K.V } 446fd2421f5SAneesh Kumar K.V 4475ffc0cb3SAneesh Kumar K.V static struct inode *v9fs_qid_iget(struct super_block *sb, 4485ffc0cb3SAneesh Kumar K.V struct p9_qid *qid, 449ed80fcfaSAneesh Kumar K.V struct p9_wstat *st, 450ed80fcfaSAneesh Kumar K.V int new) 4515ffc0cb3SAneesh Kumar K.V { 45245089142SAneesh Kumar K.V dev_t rdev; 4533eda0de6SAl Viro int retval; 4543eda0de6SAl Viro umode_t umode; 4555ffc0cb3SAneesh Kumar K.V unsigned long i_ino; 4565ffc0cb3SAneesh Kumar K.V struct inode *inode; 4575ffc0cb3SAneesh Kumar K.V struct v9fs_session_info *v9ses = sb->s_fs_info; 4586e195b0fSDominique Martinet int (*test)(struct inode *inode, void *data); 459ed80fcfaSAneesh Kumar K.V 460ed80fcfaSAneesh Kumar K.V if (new) 461ed80fcfaSAneesh Kumar K.V test = v9fs_test_new_inode; 462ed80fcfaSAneesh Kumar K.V else 463ed80fcfaSAneesh Kumar K.V test = v9fs_test_inode; 4645ffc0cb3SAneesh Kumar K.V 4655ffc0cb3SAneesh Kumar K.V i_ino = v9fs_qid2ino(qid); 466ed80fcfaSAneesh Kumar K.V inode = iget5_locked(sb, i_ino, test, v9fs_set_inode, st); 4675ffc0cb3SAneesh Kumar K.V if (!inode) 4685ffc0cb3SAneesh Kumar K.V return ERR_PTR(-ENOMEM); 4695ffc0cb3SAneesh Kumar K.V if (!(inode->i_state & I_NEW)) 4705ffc0cb3SAneesh Kumar K.V return inode; 4715ffc0cb3SAneesh Kumar K.V /* 4725ffc0cb3SAneesh Kumar K.V * initialize the inode with the stat info 4735ffc0cb3SAneesh Kumar K.V * FIXME!! we may need support for stale inodes 4745ffc0cb3SAneesh Kumar K.V * later. 4755ffc0cb3SAneesh Kumar K.V */ 476fd2421f5SAneesh Kumar K.V inode->i_ino = i_ino; 47745089142SAneesh Kumar K.V umode = p9mode2unixmode(v9ses, st, &rdev); 47845089142SAneesh Kumar K.V retval = v9fs_init_inode(v9ses, inode, umode, rdev); 4795ffc0cb3SAneesh Kumar K.V if (retval) 4805ffc0cb3SAneesh Kumar K.V goto error; 4815ffc0cb3SAneesh Kumar K.V 4825e3cc1eeSHou Tao v9fs_stat2inode(st, inode, sb, 0); 4835ffc0cb3SAneesh Kumar K.V v9fs_cache_inode_get_cookie(inode); 4845ffc0cb3SAneesh Kumar K.V unlock_new_inode(inode); 4855ffc0cb3SAneesh Kumar K.V return inode; 4865ffc0cb3SAneesh Kumar K.V error: 4870a73d0a2SAl Viro iget_failed(inode); 4885ffc0cb3SAneesh Kumar K.V return ERR_PTR(retval); 4895ffc0cb3SAneesh Kumar K.V 4905ffc0cb3SAneesh Kumar K.V } 4915ffc0cb3SAneesh Kumar K.V 49253c06f4eSAneesh Kumar K.V struct inode * 493a78ce05dSAneesh Kumar K.V v9fs_inode_from_fid(struct v9fs_session_info *v9ses, struct p9_fid *fid, 494ed80fcfaSAneesh Kumar K.V struct super_block *sb, int new) 4956a3124a3SLatchesar Ionkov { 49651a87c55SEric Van Hensbergen struct p9_wstat *st; 4975ffc0cb3SAneesh Kumar K.V struct inode *inode = NULL; 4986a3124a3SLatchesar Ionkov 499bd238fb4SLatchesar Ionkov st = p9_client_stat(fid); 50002bc3567SAbhishek Kulkarni if (IS_ERR(st)) 50102bc3567SAbhishek Kulkarni return ERR_CAST(st); 5022bad8471SEric Van Hensbergen 503ed80fcfaSAneesh Kumar K.V inode = v9fs_qid_iget(sb, &st->qid, st, new); 50402bc3567SAbhishek Kulkarni p9stat_free(st); 505bd238fb4SLatchesar Ionkov kfree(st); 5065ffc0cb3SAneesh Kumar K.V return inode; 5072bad8471SEric Van Hensbergen } 5082bad8471SEric Van Hensbergen 5092bad8471SEric Van Hensbergen /** 510f88657ceSAneesh Kumar K.V * v9fs_at_to_dotl_flags- convert Linux specific AT flags to 511f88657ceSAneesh Kumar K.V * plan 9 AT flag. 512f88657ceSAneesh Kumar K.V * @flags: flags to convert 513f88657ceSAneesh Kumar K.V */ 514f88657ceSAneesh Kumar K.V static int v9fs_at_to_dotl_flags(int flags) 515f88657ceSAneesh Kumar K.V { 516f88657ceSAneesh Kumar K.V int rflags = 0; 5176e195b0fSDominique Martinet 518f88657ceSAneesh Kumar K.V if (flags & AT_REMOVEDIR) 519f88657ceSAneesh Kumar K.V rflags |= P9_DOTL_AT_REMOVEDIR; 5206e195b0fSDominique Martinet 521f88657ceSAneesh Kumar K.V return rflags; 522f88657ceSAneesh Kumar K.V } 523f88657ceSAneesh Kumar K.V 524f88657ceSAneesh Kumar K.V /** 525ac89b2efSEryu Guan * v9fs_dec_count - helper functon to drop i_nlink. 526ac89b2efSEryu Guan * 527ac89b2efSEryu Guan * If a directory had nlink <= 2 (including . and ..), then we should not drop 528ac89b2efSEryu Guan * the link count, which indicates the underlying exported fs doesn't maintain 529ac89b2efSEryu Guan * nlink accurately. e.g. 530ac89b2efSEryu Guan * - overlayfs sets nlink to 1 for merged dir 531ac89b2efSEryu Guan * - ext4 (with dir_nlink feature enabled) sets nlink to 1 if a dir has more 532ac89b2efSEryu Guan * than EXT4_LINK_MAX (65000) links. 533ac89b2efSEryu Guan * 534ac89b2efSEryu Guan * @inode: inode whose nlink is being dropped 535ac89b2efSEryu Guan */ 536ac89b2efSEryu Guan static void v9fs_dec_count(struct inode *inode) 537ac89b2efSEryu Guan { 538ac89b2efSEryu Guan if (!S_ISDIR(inode->i_mode) || inode->i_nlink > 2) 539ac89b2efSEryu Guan drop_nlink(inode); 540ac89b2efSEryu Guan } 541ac89b2efSEryu Guan 542ac89b2efSEryu Guan /** 5432bad8471SEric Van Hensbergen * v9fs_remove - helper function to remove files and directories 54473c592b9SEric Van Hensbergen * @dir: directory inode that is being deleted 54548e370ffSAneesh Kumar K.V * @dentry: dentry that is being deleted 546fd2916bdSFabian Frederick * @flags: removing a directory 5472bad8471SEric Van Hensbergen * 5482bad8471SEric Van Hensbergen */ 5492bad8471SEric Van Hensbergen 55048e370ffSAneesh Kumar K.V static int v9fs_remove(struct inode *dir, struct dentry *dentry, int flags) 5512bad8471SEric Van Hensbergen { 55248e370ffSAneesh Kumar K.V struct inode *inode; 55348e370ffSAneesh Kumar K.V int retval = -EOPNOTSUPP; 55448e370ffSAneesh Kumar K.V struct p9_fid *v9fid, *dfid; 55548e370ffSAneesh Kumar K.V struct v9fs_session_info *v9ses; 5562bad8471SEric Van Hensbergen 5575d385153SJoe Perches p9_debug(P9_DEBUG_VFS, "inode: %p dentry: %p rmdir: %x\n", 55848e370ffSAneesh Kumar K.V dir, dentry, flags); 5592bad8471SEric Van Hensbergen 56048e370ffSAneesh Kumar K.V v9ses = v9fs_inode2v9ses(dir); 5612b0143b5SDavid Howells inode = d_inode(dentry); 56277d5a6b7SAl Viro dfid = v9fs_parent_fid(dentry); 56348e370ffSAneesh Kumar K.V if (IS_ERR(dfid)) { 56448e370ffSAneesh Kumar K.V retval = PTR_ERR(dfid); 5655d385153SJoe Perches p9_debug(P9_DEBUG_VFS, "fid lookup failed %d\n", retval); 56648e370ffSAneesh Kumar K.V return retval; 56748e370ffSAneesh Kumar K.V } 56848e370ffSAneesh Kumar K.V if (v9fs_proto_dotl(v9ses)) 569f88657ceSAneesh Kumar K.V retval = p9_client_unlinkat(dfid, dentry->d_name.name, 570f88657ceSAneesh Kumar K.V v9fs_at_to_dotl_flags(flags)); 5716636b6dcSJianyong Wu p9_client_clunk(dfid); 57248e370ffSAneesh Kumar K.V if (retval == -EOPNOTSUPP) { 57348e370ffSAneesh Kumar K.V /* Try the one based on path */ 57448e370ffSAneesh Kumar K.V v9fid = v9fs_fid_clone(dentry); 575da977b2cSEric Van Hensbergen if (IS_ERR(v9fid)) 576da977b2cSEric Van Hensbergen return PTR_ERR(v9fid); 577d994f405SAneesh Kumar K.V retval = p9_client_remove(v9fid); 57848e370ffSAneesh Kumar K.V } 579b271ec47SAneesh Kumar K.V if (!retval) { 580b271ec47SAneesh Kumar K.V /* 581b271ec47SAneesh Kumar K.V * directories on unlink should have zero 582b271ec47SAneesh Kumar K.V * link count 583b271ec47SAneesh Kumar K.V */ 58448e370ffSAneesh Kumar K.V if (flags & AT_REMOVEDIR) { 58548e370ffSAneesh Kumar K.V clear_nlink(inode); 586ac89b2efSEryu Guan v9fs_dec_count(dir); 587b271ec47SAneesh Kumar K.V } else 588ac89b2efSEryu Guan v9fs_dec_count(inode); 589d28c61f0SAneesh Kumar K.V 59048e370ffSAneesh Kumar K.V v9fs_invalidate_inode_attr(inode); 591d28c61f0SAneesh Kumar K.V v9fs_invalidate_inode_attr(dir); 592154372e6SEric Van Hensbergen 593154372e6SEric Van Hensbergen /* invalidate all fids associated with dentry */ 594154372e6SEric Van Hensbergen /* NOTE: This will not include open fids */ 595154372e6SEric Van Hensbergen dentry->d_op->d_release(dentry); 596b271ec47SAneesh Kumar K.V } 597d994f405SAneesh Kumar K.V return retval; 5982bad8471SEric Van Hensbergen } 5992bad8471SEric Van Hensbergen 600bd238fb4SLatchesar Ionkov /** 601bd238fb4SLatchesar Ionkov * v9fs_create - Create a file 602ee443996SEric Van Hensbergen * @v9ses: session information 603ee443996SEric Van Hensbergen * @dir: directory that dentry is being created in 604bd238fb4SLatchesar Ionkov * @dentry: dentry that is being created 6050e15597eSAbhishek Kulkarni * @extension: 9p2000.u extension string to support devices, etc. 606bd238fb4SLatchesar Ionkov * @perm: create permissions 607bd238fb4SLatchesar Ionkov * @mode: open mode 608bd238fb4SLatchesar Ionkov * 609bd238fb4SLatchesar Ionkov */ 610bd238fb4SLatchesar Ionkov static struct p9_fid * 611bd238fb4SLatchesar Ionkov v9fs_create(struct v9fs_session_info *v9ses, struct inode *dir, 612bd238fb4SLatchesar Ionkov struct dentry *dentry, char *extension, u32 perm, u8 mode) 613bd238fb4SLatchesar Ionkov { 614bd238fb4SLatchesar Ionkov int err; 6157880b43bSAl Viro const unsigned char *name; 6166636b6dcSJianyong Wu struct p9_fid *dfid, *ofid = NULL, *fid = NULL; 617bd238fb4SLatchesar Ionkov struct inode *inode; 618bd238fb4SLatchesar Ionkov 6194b8e9923SAl Viro p9_debug(P9_DEBUG_VFS, "name %pd\n", dentry); 62051a87c55SEric Van Hensbergen 621bd238fb4SLatchesar Ionkov err = 0; 6227880b43bSAl Viro name = dentry->d_name.name; 62377d5a6b7SAl Viro dfid = v9fs_parent_fid(dentry); 624bd238fb4SLatchesar Ionkov if (IS_ERR(dfid)) { 625bd238fb4SLatchesar Ionkov err = PTR_ERR(dfid); 6265d385153SJoe Perches p9_debug(P9_DEBUG_VFS, "fid lookup failed %d\n", err); 6276d27e64dSVenkateswararao Jujjuri return ERR_PTR(err); 628bd238fb4SLatchesar Ionkov } 629bd238fb4SLatchesar Ionkov 630bd238fb4SLatchesar Ionkov /* clone a fid to use for creation */ 6317d50a29fSAl Viro ofid = clone_fid(dfid); 632bd238fb4SLatchesar Ionkov if (IS_ERR(ofid)) { 633bd238fb4SLatchesar Ionkov err = PTR_ERR(ofid); 6345d385153SJoe Perches p9_debug(P9_DEBUG_VFS, "p9_client_walk failed %d\n", err); 6356636b6dcSJianyong Wu p9_client_clunk(dfid); 6366d27e64dSVenkateswararao Jujjuri return ERR_PTR(err); 637bd238fb4SLatchesar Ionkov } 638bd238fb4SLatchesar Ionkov 639bd238fb4SLatchesar Ionkov err = p9_client_fcreate(ofid, name, perm, mode, extension); 64051a87c55SEric Van Hensbergen if (err < 0) { 6415d385153SJoe Perches p9_debug(P9_DEBUG_VFS, "p9_client_fcreate failed %d\n", err); 6426636b6dcSJianyong Wu p9_client_clunk(dfid); 643bd238fb4SLatchesar Ionkov goto error; 64451a87c55SEric Van Hensbergen } 645bd238fb4SLatchesar Ionkov 646b6054793SAneesh Kumar K.V if (!(perm & P9_DMLINK)) { 647bd238fb4SLatchesar Ionkov /* now walk from the parent so we can get unopened fid */ 6486d27e64dSVenkateswararao Jujjuri fid = p9_client_walk(dfid, 1, &name, 1); 649bd238fb4SLatchesar Ionkov if (IS_ERR(fid)) { 650bd238fb4SLatchesar Ionkov err = PTR_ERR(fid); 651b6054793SAneesh Kumar K.V p9_debug(P9_DEBUG_VFS, 652b6054793SAneesh Kumar K.V "p9_client_walk failed %d\n", err); 653bd238fb4SLatchesar Ionkov fid = NULL; 6546636b6dcSJianyong Wu p9_client_clunk(dfid); 655bd238fb4SLatchesar Ionkov goto error; 6566d27e64dSVenkateswararao Jujjuri } 657b6054793SAneesh Kumar K.V /* 658b6054793SAneesh Kumar K.V * instantiate inode and assign the unopened fid to the dentry 659b6054793SAneesh Kumar K.V */ 660ed80fcfaSAneesh Kumar K.V inode = v9fs_get_new_inode_from_fid(v9ses, fid, dir->i_sb); 661bd238fb4SLatchesar Ionkov if (IS_ERR(inode)) { 662bd238fb4SLatchesar Ionkov err = PTR_ERR(inode); 663b6054793SAneesh Kumar K.V p9_debug(P9_DEBUG_VFS, 664b6054793SAneesh Kumar K.V "inode creation failed %d\n", err); 6656636b6dcSJianyong Wu p9_client_clunk(dfid); 666bd238fb4SLatchesar Ionkov goto error; 667bd238fb4SLatchesar Ionkov } 6682ea03e1dSAl Viro v9fs_fid_add(dentry, fid); 6695441ae5eSAneesh Kumar K.V d_instantiate(dentry, inode); 670b6054793SAneesh Kumar K.V } 6716636b6dcSJianyong Wu p9_client_clunk(dfid); 672bd238fb4SLatchesar Ionkov return ofid; 673bd238fb4SLatchesar Ionkov error: 674bd238fb4SLatchesar Ionkov if (ofid) 675bd238fb4SLatchesar Ionkov p9_client_clunk(ofid); 676bd238fb4SLatchesar Ionkov 677bd238fb4SLatchesar Ionkov if (fid) 678bd238fb4SLatchesar Ionkov p9_client_clunk(fid); 679bd238fb4SLatchesar Ionkov 680bd238fb4SLatchesar Ionkov return ERR_PTR(err); 681bd238fb4SLatchesar Ionkov } 682bd238fb4SLatchesar Ionkov 6832bad8471SEric Van Hensbergen /** 684e43ae79cSMiklos Szeredi * v9fs_vfs_create - VFS hook to create a regular file 685bc868036SDavid Howells * @mnt_userns: The user namespace of the mount 686bc868036SDavid Howells * @dir: The parent directory 687bc868036SDavid Howells * @dentry: The name of file to be created 688bc868036SDavid Howells * @mode: The UNIX file mode to set 689bc868036SDavid Howells * @excl: True if the file must not yet exist 690e43ae79cSMiklos Szeredi * 691e43ae79cSMiklos Szeredi * open(.., O_CREAT) is handled in v9fs_vfs_atomic_open(). This is only called 692e43ae79cSMiklos Szeredi * for mknod(2). 693e43ae79cSMiklos Szeredi * 6942bad8471SEric Van Hensbergen */ 6952bad8471SEric Van Hensbergen 6962bad8471SEric Van Hensbergen static int 697549c7297SChristian Brauner v9fs_vfs_create(struct user_namespace *mnt_userns, struct inode *dir, 698549c7297SChristian Brauner struct dentry *dentry, umode_t mode, bool excl) 6992bad8471SEric Van Hensbergen { 700e43ae79cSMiklos Szeredi struct v9fs_session_info *v9ses = v9fs_inode2v9ses(dir); 701e43ae79cSMiklos Szeredi u32 perm = unixmode2p9mode(v9ses, mode); 702e43ae79cSMiklos Szeredi struct p9_fid *fid; 7036a3124a3SLatchesar Ionkov 704e43ae79cSMiklos Szeredi /* P9_OEXCL? */ 705e43ae79cSMiklos Szeredi fid = v9fs_create(v9ses, dir, dentry, NULL, perm, P9_ORDWR); 706e43ae79cSMiklos Szeredi if (IS_ERR(fid)) 707e43ae79cSMiklos Szeredi return PTR_ERR(fid); 7086a3124a3SLatchesar Ionkov 709d28c61f0SAneesh Kumar K.V v9fs_invalidate_inode_attr(dir); 710bd238fb4SLatchesar Ionkov p9_client_clunk(fid); 7116a3124a3SLatchesar Ionkov 7126a3124a3SLatchesar Ionkov return 0; 7132bad8471SEric Van Hensbergen } 7142bad8471SEric Van Hensbergen 7152bad8471SEric Van Hensbergen /** 7162bad8471SEric Van Hensbergen * v9fs_vfs_mkdir - VFS mkdir hook to create a directory 717bc868036SDavid Howells * @mnt_userns: The user namespace of the mount 718ee443996SEric Van Hensbergen * @dir: inode that is being unlinked 7192bad8471SEric Van Hensbergen * @dentry: dentry that is being unlinked 7202bad8471SEric Van Hensbergen * @mode: mode for new directory 7212bad8471SEric Van Hensbergen * 7222bad8471SEric Van Hensbergen */ 7232bad8471SEric Van Hensbergen 724549c7297SChristian Brauner static int v9fs_vfs_mkdir(struct user_namespace *mnt_userns, struct inode *dir, 725549c7297SChristian Brauner struct dentry *dentry, umode_t mode) 7262bad8471SEric Van Hensbergen { 7276a3124a3SLatchesar Ionkov int err; 728bd238fb4SLatchesar Ionkov u32 perm; 729bd238fb4SLatchesar Ionkov struct p9_fid *fid; 730d28c61f0SAneesh Kumar K.V struct v9fs_session_info *v9ses; 7316a3124a3SLatchesar Ionkov 7324b8e9923SAl Viro p9_debug(P9_DEBUG_VFS, "name %pd\n", dentry); 733bd238fb4SLatchesar Ionkov err = 0; 7346a3124a3SLatchesar Ionkov v9ses = v9fs_inode2v9ses(dir); 7356a3124a3SLatchesar Ionkov perm = unixmode2p9mode(v9ses, mode | S_IFDIR); 736bd238fb4SLatchesar Ionkov fid = v9fs_create(v9ses, dir, dentry, NULL, perm, P9_OREAD); 737bd238fb4SLatchesar Ionkov if (IS_ERR(fid)) { 738bd238fb4SLatchesar Ionkov err = PTR_ERR(fid); 739bd238fb4SLatchesar Ionkov fid = NULL; 740d28c61f0SAneesh Kumar K.V } else { 741b271ec47SAneesh Kumar K.V inc_nlink(dir); 742d28c61f0SAneesh Kumar K.V v9fs_invalidate_inode_attr(dir); 743d28c61f0SAneesh Kumar K.V } 7446a3124a3SLatchesar Ionkov 745bd238fb4SLatchesar Ionkov if (fid) 746bd238fb4SLatchesar Ionkov p9_client_clunk(fid); 7476a3124a3SLatchesar Ionkov 7486a3124a3SLatchesar Ionkov return err; 7492bad8471SEric Van Hensbergen } 7502bad8471SEric Van Hensbergen 7512bad8471SEric Van Hensbergen /** 7522bad8471SEric Van Hensbergen * v9fs_vfs_lookup - VFS lookup hook to "walk" to a new inode 7532bad8471SEric Van Hensbergen * @dir: inode that is being walked from 7542bad8471SEric Van Hensbergen * @dentry: dentry that is being walked to? 755fd2916bdSFabian Frederick * @flags: lookup flags (unused) 7562bad8471SEric Van Hensbergen * 7572bad8471SEric Van Hensbergen */ 7582bad8471SEric Van Hensbergen 75953c06f4eSAneesh Kumar K.V struct dentry *v9fs_vfs_lookup(struct inode *dir, struct dentry *dentry, 76000cd8dd3SAl Viro unsigned int flags) 7612bad8471SEric Van Hensbergen { 76273f50717SAneesh Kumar K.V struct dentry *res; 7632bad8471SEric Van Hensbergen struct v9fs_session_info *v9ses; 764bd238fb4SLatchesar Ionkov struct p9_fid *dfid, *fid; 7652bad8471SEric Van Hensbergen struct inode *inode; 7667880b43bSAl Viro const unsigned char *name; 7672bad8471SEric Van Hensbergen 7684b8e9923SAl Viro p9_debug(P9_DEBUG_VFS, "dir: %p dentry: (%pd) %p flags: %x\n", 7694b8e9923SAl Viro dir, dentry, dentry, flags); 7702bad8471SEric Van Hensbergen 77111e9b49bSSripathi Kodi if (dentry->d_name.len > NAME_MAX) 77211e9b49bSSripathi Kodi return ERR_PTR(-ENAMETOOLONG); 77311e9b49bSSripathi Kodi 7742bad8471SEric Van Hensbergen v9ses = v9fs_inode2v9ses(dir); 775a534c8d1SAneesh Kumar K.V /* We can walk d_parent because we hold the dir->i_mutex */ 77677d5a6b7SAl Viro dfid = v9fs_parent_fid(dentry); 777bd238fb4SLatchesar Ionkov if (IS_ERR(dfid)) 778e231c2eeSDavid Howells return ERR_CAST(dfid); 7792bad8471SEric Van Hensbergen 78073f50717SAneesh Kumar K.V /* 78173f50717SAneesh Kumar K.V * Make sure we don't use a wrong inode due to parallel 78273f50717SAneesh Kumar K.V * unlink. For cached mode create calls request for new 78373f50717SAneesh Kumar K.V * inode. But with cache disabled, lookup should do this. 78473f50717SAneesh Kumar K.V */ 785500e2ab6SAl Viro name = dentry->d_name.name; 786500e2ab6SAl Viro fid = p9_client_walk(dfid, 1, &name, 1); 7876636b6dcSJianyong Wu p9_client_clunk(dfid); 788500e2ab6SAl Viro if (fid == ERR_PTR(-ENOENT)) 789500e2ab6SAl Viro inode = NULL; 790500e2ab6SAl Viro else if (IS_ERR(fid)) 791500e2ab6SAl Viro inode = ERR_CAST(fid); 792500e2ab6SAl Viro else if (v9ses->cache == CACHE_LOOSE || v9ses->cache == CACHE_FSCACHE) 793a78ce05dSAneesh Kumar K.V inode = v9fs_get_inode_from_fid(v9ses, fid, dir->i_sb); 79473f50717SAneesh Kumar K.V else 79573f50717SAneesh Kumar K.V inode = v9fs_get_new_inode_from_fid(v9ses, fid, dir->i_sb); 79673f50717SAneesh Kumar K.V /* 79773f50717SAneesh Kumar K.V * If we had a rename on the server and a parallel lookup 79873f50717SAneesh Kumar K.V * for the new name, then make sure we instantiate with 79973f50717SAneesh Kumar K.V * the new name. ie look up for a/b, while on server somebody 80073f50717SAneesh Kumar K.V * moved b under k and client parallely did a lookup for 80173f50717SAneesh Kumar K.V * k/b. 80273f50717SAneesh Kumar K.V */ 80341d28bcaSAl Viro res = d_splice_alias(inode, dentry); 804500e2ab6SAl Viro if (!IS_ERR(fid)) { 805a3b2157eSAl Viro if (!res) 806a3b2157eSAl Viro v9fs_fid_add(dentry, fid); 807a3b2157eSAl Viro else if (!IS_ERR(res)) 808a3b2157eSAl Viro v9fs_fid_add(res, fid); 809a3b2157eSAl Viro else 810bd238fb4SLatchesar Ionkov p9_client_clunk(fid); 811500e2ab6SAl Viro } 8127b5be621SAl Viro return res; 8132bad8471SEric Van Hensbergen } 8142bad8471SEric Van Hensbergen 815d9585277SAl Viro static int 816e43ae79cSMiklos Szeredi v9fs_vfs_atomic_open(struct inode *dir, struct dentry *dentry, 8176e195b0fSDominique Martinet struct file *file, unsigned int flags, umode_t mode) 818e43ae79cSMiklos Szeredi { 819e43ae79cSMiklos Szeredi int err; 820e43ae79cSMiklos Szeredi u32 perm; 821e43ae79cSMiklos Szeredi struct v9fs_inode *v9inode; 822e43ae79cSMiklos Szeredi struct v9fs_session_info *v9ses; 823e43ae79cSMiklos Szeredi struct p9_fid *fid, *inode_fid; 824e43ae79cSMiklos Szeredi struct dentry *res = NULL; 825987a6485SGreg Kurz struct inode *inode; 826e43ae79cSMiklos Szeredi 82700699ad8SAl Viro if (d_in_lookup(dentry)) { 82800cd8dd3SAl Viro res = v9fs_vfs_lookup(dir, dentry, 0); 829e43ae79cSMiklos Szeredi if (IS_ERR(res)) 830d9585277SAl Viro return PTR_ERR(res); 831e43ae79cSMiklos Szeredi 832e43ae79cSMiklos Szeredi if (res) 833e43ae79cSMiklos Szeredi dentry = res; 834e43ae79cSMiklos Szeredi } 835e43ae79cSMiklos Szeredi 836e43ae79cSMiklos Szeredi /* Only creates */ 8372b0143b5SDavid Howells if (!(flags & O_CREAT) || d_really_is_positive(dentry)) 838e45198a6SAl Viro return finish_no_open(file, res); 839e43ae79cSMiklos Szeredi 840e43ae79cSMiklos Szeredi err = 0; 841fae74696SGeyslan G. Bem 842e43ae79cSMiklos Szeredi v9ses = v9fs_inode2v9ses(dir); 843e43ae79cSMiklos Szeredi perm = unixmode2p9mode(v9ses, mode); 844e43ae79cSMiklos Szeredi fid = v9fs_create(v9ses, dir, dentry, NULL, perm, 845e43ae79cSMiklos Szeredi v9fs_uflags2omode(flags, 846e43ae79cSMiklos Szeredi v9fs_proto_dotu(v9ses))); 847e43ae79cSMiklos Szeredi if (IS_ERR(fid)) { 848e43ae79cSMiklos Szeredi err = PTR_ERR(fid); 849e43ae79cSMiklos Szeredi fid = NULL; 850e43ae79cSMiklos Szeredi goto error; 851e43ae79cSMiklos Szeredi } 852e43ae79cSMiklos Szeredi 853e43ae79cSMiklos Szeredi v9fs_invalidate_inode_attr(dir); 854987a6485SGreg Kurz inode = d_inode(dentry); 855987a6485SGreg Kurz v9inode = V9FS_I(inode); 856e43ae79cSMiklos Szeredi mutex_lock(&v9inode->v_mutex); 857fb89b45cSDominique Martinet if ((v9ses->cache == CACHE_LOOSE || v9ses->cache == CACHE_FSCACHE) && 858fb89b45cSDominique Martinet !v9inode->writeback_fid && 859e43ae79cSMiklos Szeredi ((flags & O_ACCMODE) != O_RDONLY)) { 860e43ae79cSMiklos Szeredi /* 861e43ae79cSMiklos Szeredi * clone a fid and add it to writeback_fid 862e43ae79cSMiklos Szeredi * we do it during open time instead of 863e43ae79cSMiklos Szeredi * page dirty time via write_begin/page_mkwrite 864e43ae79cSMiklos Szeredi * because we want write after unlink usecase 865e43ae79cSMiklos Szeredi * to work. 866e43ae79cSMiklos Szeredi */ 867e43ae79cSMiklos Szeredi inode_fid = v9fs_writeback_fid(dentry); 868e43ae79cSMiklos Szeredi if (IS_ERR(inode_fid)) { 869e43ae79cSMiklos Szeredi err = PTR_ERR(inode_fid); 870e43ae79cSMiklos Szeredi mutex_unlock(&v9inode->v_mutex); 871e43ae79cSMiklos Szeredi goto error; 872e43ae79cSMiklos Szeredi } 873e43ae79cSMiklos Szeredi v9inode->writeback_fid = (void *) inode_fid; 874e43ae79cSMiklos Szeredi } 875e43ae79cSMiklos Szeredi mutex_unlock(&v9inode->v_mutex); 876be12af3eSAl Viro err = finish_open(file, dentry, generic_file_open); 87730d90494SAl Viro if (err) 878e43ae79cSMiklos Szeredi goto error; 879e43ae79cSMiklos Szeredi 88030d90494SAl Viro file->private_data = fid; 881fb89b45cSDominique Martinet if (v9ses->cache == CACHE_LOOSE || v9ses->cache == CACHE_FSCACHE) 88224e42e32SDavid Howells fscache_use_cookie(v9fs_inode_cookie(v9inode), 88324e42e32SDavid Howells file->f_mode & FMODE_WRITE); 884987a6485SGreg Kurz v9fs_open_fid_add(inode, fid); 885e43ae79cSMiklos Szeredi 88673a09dd9SAl Viro file->f_mode |= FMODE_CREATED; 887e43ae79cSMiklos Szeredi out: 888e43ae79cSMiklos Szeredi dput(res); 889d9585277SAl Viro return err; 890e43ae79cSMiklos Szeredi 891e43ae79cSMiklos Szeredi error: 892e43ae79cSMiklos Szeredi if (fid) 893e43ae79cSMiklos Szeredi p9_client_clunk(fid); 894e43ae79cSMiklos Szeredi goto out; 895e43ae79cSMiklos Szeredi } 896e43ae79cSMiklos Szeredi 8972bad8471SEric Van Hensbergen /** 8982bad8471SEric Van Hensbergen * v9fs_vfs_unlink - VFS unlink hook to delete an inode 8992bad8471SEric Van Hensbergen * @i: inode that is being unlinked 90073c592b9SEric Van Hensbergen * @d: dentry that is being unlinked 9012bad8471SEric Van Hensbergen * 9022bad8471SEric Van Hensbergen */ 9032bad8471SEric Van Hensbergen 90453c06f4eSAneesh Kumar K.V int v9fs_vfs_unlink(struct inode *i, struct dentry *d) 9052bad8471SEric Van Hensbergen { 9062bad8471SEric Van Hensbergen return v9fs_remove(i, d, 0); 9072bad8471SEric Van Hensbergen } 9082bad8471SEric Van Hensbergen 9092bad8471SEric Van Hensbergen /** 9102bad8471SEric Van Hensbergen * v9fs_vfs_rmdir - VFS unlink hook to delete a directory 9112bad8471SEric Van Hensbergen * @i: inode that is being unlinked 91273c592b9SEric Van Hensbergen * @d: dentry that is being unlinked 9132bad8471SEric Van Hensbergen * 9142bad8471SEric Van Hensbergen */ 9152bad8471SEric Van Hensbergen 91653c06f4eSAneesh Kumar K.V int v9fs_vfs_rmdir(struct inode *i, struct dentry *d) 9172bad8471SEric Van Hensbergen { 91848e370ffSAneesh Kumar K.V return v9fs_remove(i, d, AT_REMOVEDIR); 9192bad8471SEric Van Hensbergen } 9202bad8471SEric Van Hensbergen 9212bad8471SEric Van Hensbergen /** 9222bad8471SEric Van Hensbergen * v9fs_vfs_rename - VFS hook to rename an inode 923bc868036SDavid Howells * @mnt_userns: The user namespace of the mount 9242bad8471SEric Van Hensbergen * @old_dir: old dir inode 9252bad8471SEric Van Hensbergen * @old_dentry: old dentry 9262bad8471SEric Van Hensbergen * @new_dir: new dir inode 9272bad8471SEric Van Hensbergen * @new_dentry: new dentry 928bc868036SDavid Howells * @flags: RENAME_* flags 9292bad8471SEric Van Hensbergen * 9302bad8471SEric Van Hensbergen */ 9312bad8471SEric Van Hensbergen 93253c06f4eSAneesh Kumar K.V int 933549c7297SChristian Brauner v9fs_vfs_rename(struct user_namespace *mnt_userns, struct inode *old_dir, 934549c7297SChristian Brauner struct dentry *old_dentry, struct inode *new_dir, 935549c7297SChristian Brauner struct dentry *new_dentry, unsigned int flags) 9362bad8471SEric Van Hensbergen { 937d28c61f0SAneesh Kumar K.V int retval; 938bd238fb4SLatchesar Ionkov struct inode *old_inode; 939b271ec47SAneesh Kumar K.V struct inode *new_inode; 940bd238fb4SLatchesar Ionkov struct v9fs_session_info *v9ses; 9416636b6dcSJianyong Wu struct p9_fid *oldfid, *dfid; 942bd238fb4SLatchesar Ionkov struct p9_fid *olddirfid; 943bd238fb4SLatchesar Ionkov struct p9_fid *newdirfid; 944bd238fb4SLatchesar Ionkov struct p9_wstat wstat; 9452bad8471SEric Van Hensbergen 9461cd66c93SMiklos Szeredi if (flags) 9471cd66c93SMiklos Szeredi return -EINVAL; 9481cd66c93SMiklos Szeredi 9495d385153SJoe Perches p9_debug(P9_DEBUG_VFS, "\n"); 950bd238fb4SLatchesar Ionkov retval = 0; 9512b0143b5SDavid Howells old_inode = d_inode(old_dentry); 9522b0143b5SDavid Howells new_inode = d_inode(new_dentry); 953bd238fb4SLatchesar Ionkov v9ses = v9fs_inode2v9ses(old_inode); 954bd238fb4SLatchesar Ionkov oldfid = v9fs_fid_lookup(old_dentry); 955da977b2cSEric Van Hensbergen if (IS_ERR(oldfid)) 956da977b2cSEric Van Hensbergen return PTR_ERR(oldfid); 957da977b2cSEric Van Hensbergen 9586636b6dcSJianyong Wu dfid = v9fs_parent_fid(old_dentry); 9596636b6dcSJianyong Wu olddirfid = clone_fid(dfid); 9606636b6dcSJianyong Wu if (dfid && !IS_ERR(dfid)) 9616636b6dcSJianyong Wu p9_client_clunk(dfid); 9626636b6dcSJianyong Wu 963da977b2cSEric Van Hensbergen if (IS_ERR(olddirfid)) { 964da977b2cSEric Van Hensbergen retval = PTR_ERR(olddirfid); 965bd238fb4SLatchesar Ionkov goto done; 966da977b2cSEric Van Hensbergen } 967da977b2cSEric Van Hensbergen 9686636b6dcSJianyong Wu dfid = v9fs_parent_fid(new_dentry); 9696636b6dcSJianyong Wu newdirfid = clone_fid(dfid); 9706636b6dcSJianyong Wu p9_client_clunk(dfid); 9716636b6dcSJianyong Wu 972da977b2cSEric Van Hensbergen if (IS_ERR(newdirfid)) { 973da977b2cSEric Van Hensbergen retval = PTR_ERR(newdirfid); 974bd238fb4SLatchesar Ionkov goto clunk_olddir; 9752bad8471SEric Van Hensbergen } 9762bad8471SEric Van Hensbergen 977a534c8d1SAneesh Kumar K.V down_write(&v9ses->rename_sem); 9784681dbdaSSripathi Kodi if (v9fs_proto_dotl(v9ses)) { 9799e8fb38eSAneesh Kumar K.V retval = p9_client_renameat(olddirfid, old_dentry->d_name.name, 9809e8fb38eSAneesh Kumar K.V newdirfid, new_dentry->d_name.name); 9819e8fb38eSAneesh Kumar K.V if (retval == -EOPNOTSUPP) 9824681dbdaSSripathi Kodi retval = p9_client_rename(oldfid, newdirfid, 9839e8fb38eSAneesh Kumar K.V new_dentry->d_name.name); 9849e8fb38eSAneesh Kumar K.V if (retval != -EOPNOTSUPP) 9854681dbdaSSripathi Kodi goto clunk_newdir; 9864681dbdaSSripathi Kodi } 987a534c8d1SAneesh Kumar K.V if (old_dentry->d_parent != new_dentry->d_parent) { 988a534c8d1SAneesh Kumar K.V /* 989a534c8d1SAneesh Kumar K.V * 9P .u can only handle file rename in the same directory 990a534c8d1SAneesh Kumar K.V */ 9914681dbdaSSripathi Kodi 9925d385153SJoe Perches p9_debug(P9_DEBUG_ERROR, "old dir and new dir are different\n"); 993621997cdSEric Van Hensbergen retval = -EXDEV; 994bd238fb4SLatchesar Ionkov goto clunk_newdir; 9952bad8471SEric Van Hensbergen } 996531b1094SLatchesar Ionkov v9fs_blank_wstat(&wstat); 997ba17674fSLatchesar Ionkov wstat.muid = v9ses->uname; 9987880b43bSAl Viro wstat.name = new_dentry->d_name.name; 999bd238fb4SLatchesar Ionkov retval = p9_client_wstat(oldfid, &wstat); 10002bad8471SEric Van Hensbergen 1001bd238fb4SLatchesar Ionkov clunk_newdir: 1002b271ec47SAneesh Kumar K.V if (!retval) { 1003b271ec47SAneesh Kumar K.V if (new_inode) { 1004b271ec47SAneesh Kumar K.V if (S_ISDIR(new_inode->i_mode)) 1005b271ec47SAneesh Kumar K.V clear_nlink(new_inode); 1006b271ec47SAneesh Kumar K.V else 1007ac89b2efSEryu Guan v9fs_dec_count(new_inode); 1008b271ec47SAneesh Kumar K.V } 1009b271ec47SAneesh Kumar K.V if (S_ISDIR(old_inode->i_mode)) { 1010b271ec47SAneesh Kumar K.V if (!new_inode) 1011b271ec47SAneesh Kumar K.V inc_nlink(new_dir); 1012ac89b2efSEryu Guan v9fs_dec_count(old_dir); 1013b271ec47SAneesh Kumar K.V } 10143bc86de3SAneesh Kumar K.V v9fs_invalidate_inode_attr(old_inode); 1015d28c61f0SAneesh Kumar K.V v9fs_invalidate_inode_attr(old_dir); 1016d28c61f0SAneesh Kumar K.V v9fs_invalidate_inode_attr(new_dir); 10173bc86de3SAneesh Kumar K.V 1018a534c8d1SAneesh Kumar K.V /* successful rename */ 1019a534c8d1SAneesh Kumar K.V d_move(old_dentry, new_dentry); 1020b271ec47SAneesh Kumar K.V } 1021a534c8d1SAneesh Kumar K.V up_write(&v9ses->rename_sem); 102222150c4fSLatchesar Ionkov p9_client_clunk(newdirfid); 10232bad8471SEric Van Hensbergen 1024bd238fb4SLatchesar Ionkov clunk_olddir: 102522150c4fSLatchesar Ionkov p9_client_clunk(olddirfid); 10262bad8471SEric Van Hensbergen 1027bd238fb4SLatchesar Ionkov done: 10286636b6dcSJianyong Wu p9_client_clunk(oldfid); 10292bad8471SEric Van Hensbergen return retval; 10302bad8471SEric Van Hensbergen } 10312bad8471SEric Van Hensbergen 10322bad8471SEric Van Hensbergen /** 1033943ffb58SAdrian Bunk * v9fs_vfs_getattr - retrieve file metadata 1034bc868036SDavid Howells * @mnt_userns: The user namespace of the mount 1035a528d35eSDavid Howells * @path: Object to query 1036ee443996SEric Van Hensbergen * @stat: metadata structure to populate 1037a528d35eSDavid Howells * @request_mask: Mask of STATX_xxx flags indicating the caller's interests 1038a528d35eSDavid Howells * @flags: AT_STATX_xxx setting 10392bad8471SEric Van Hensbergen * 10402bad8471SEric Van Hensbergen */ 10412bad8471SEric Van Hensbergen 10422bad8471SEric Van Hensbergen static int 1043549c7297SChristian Brauner v9fs_vfs_getattr(struct user_namespace *mnt_userns, const struct path *path, 1044549c7297SChristian Brauner struct kstat *stat, u32 request_mask, unsigned int flags) 10452bad8471SEric Van Hensbergen { 1046a528d35eSDavid Howells struct dentry *dentry = path->dentry; 1047bd238fb4SLatchesar Ionkov struct v9fs_session_info *v9ses; 1048bd238fb4SLatchesar Ionkov struct p9_fid *fid; 104951a87c55SEric Van Hensbergen struct p9_wstat *st; 10502bad8471SEric Van Hensbergen 10515d385153SJoe Perches p9_debug(P9_DEBUG_VFS, "dentry: %p\n", dentry); 105242869c8aSAneesh Kumar K.V v9ses = v9fs_dentry2v9ses(dentry); 1053a1211908SAneesh Kumar K.V if (v9ses->cache == CACHE_LOOSE || v9ses->cache == CACHE_FSCACHE) { 10540d56a451SChristian Brauner generic_fillattr(&init_user_ns, d_inode(dentry), stat); 1055a1211908SAneesh Kumar K.V return 0; 1056a1211908SAneesh Kumar K.V } 1057bd238fb4SLatchesar Ionkov fid = v9fs_fid_lookup(dentry); 1058da977b2cSEric Van Hensbergen if (IS_ERR(fid)) 1059da977b2cSEric Van Hensbergen return PTR_ERR(fid); 10602bad8471SEric Van Hensbergen 1061bd238fb4SLatchesar Ionkov st = p9_client_stat(fid); 10626636b6dcSJianyong Wu p9_client_clunk(fid); 1063bd238fb4SLatchesar Ionkov if (IS_ERR(st)) 1064bd238fb4SLatchesar Ionkov return PTR_ERR(st); 10652bad8471SEric Van Hensbergen 10665e3cc1eeSHou Tao v9fs_stat2inode(st, d_inode(dentry), dentry->d_sb, 0); 10670d56a451SChristian Brauner generic_fillattr(&init_user_ns, d_inode(dentry), stat); 10682bad8471SEric Van Hensbergen 106962b2be59SLatchesar Ionkov p9stat_free(st); 1070bd238fb4SLatchesar Ionkov kfree(st); 1071bd238fb4SLatchesar Ionkov return 0; 10722bad8471SEric Van Hensbergen } 10732bad8471SEric Van Hensbergen 10742bad8471SEric Van Hensbergen /** 10752bad8471SEric Van Hensbergen * v9fs_vfs_setattr - set file metadata 1076bc868036SDavid Howells * @mnt_userns: The user namespace of the mount 10772bad8471SEric Van Hensbergen * @dentry: file whose metadata to set 10782bad8471SEric Van Hensbergen * @iattr: metadata assignment structure 10792bad8471SEric Van Hensbergen * 10802bad8471SEric Van Hensbergen */ 10812bad8471SEric Van Hensbergen 1082549c7297SChristian Brauner static int v9fs_vfs_setattr(struct user_namespace *mnt_userns, 1083549c7297SChristian Brauner struct dentry *dentry, struct iattr *iattr) 10842bad8471SEric Van Hensbergen { 10856636b6dcSJianyong Wu int retval, use_dentry = 0; 108624e42e32SDavid Howells struct inode *inode = d_inode(dentry); 108724e42e32SDavid Howells struct v9fs_inode *v9inode = V9FS_I(inode); 1088bd238fb4SLatchesar Ionkov struct v9fs_session_info *v9ses; 108966246641SJianyong Wu struct p9_fid *fid = NULL; 1090bd238fb4SLatchesar Ionkov struct p9_wstat wstat; 10912bad8471SEric Van Hensbergen 10925d385153SJoe Perches p9_debug(P9_DEBUG_VFS, "\n"); 10932f221d6fSChristian Brauner retval = setattr_prepare(&init_user_ns, dentry, iattr); 1094059c138bSAneesh Kumar K.V if (retval) 1095059c138bSAneesh Kumar K.V return retval; 1096059c138bSAneesh Kumar K.V 1097bd238fb4SLatchesar Ionkov retval = -EPERM; 109842869c8aSAneesh Kumar K.V v9ses = v9fs_dentry2v9ses(dentry); 109966246641SJianyong Wu if (iattr->ia_valid & ATTR_FILE) { 110066246641SJianyong Wu fid = iattr->ia_file->private_data; 110166246641SJianyong Wu WARN_ON(!fid); 110266246641SJianyong Wu } 11036636b6dcSJianyong Wu if (!fid) { 1104bd238fb4SLatchesar Ionkov fid = v9fs_fid_lookup(dentry); 11056636b6dcSJianyong Wu use_dentry = 1; 11066636b6dcSJianyong Wu } 1107da977b2cSEric Van Hensbergen if (IS_ERR(fid)) 1108da977b2cSEric Van Hensbergen return PTR_ERR(fid); 11092bad8471SEric Van Hensbergen 1110531b1094SLatchesar Ionkov v9fs_blank_wstat(&wstat); 11112bad8471SEric Van Hensbergen if (iattr->ia_valid & ATTR_MODE) 1112531b1094SLatchesar Ionkov wstat.mode = unixmode2p9mode(v9ses, iattr->ia_mode); 11132bad8471SEric Van Hensbergen 11142bad8471SEric Van Hensbergen if (iattr->ia_valid & ATTR_MTIME) 1115531b1094SLatchesar Ionkov wstat.mtime = iattr->ia_mtime.tv_sec; 11162bad8471SEric Van Hensbergen 11172bad8471SEric Van Hensbergen if (iattr->ia_valid & ATTR_ATIME) 1118531b1094SLatchesar Ionkov wstat.atime = iattr->ia_atime.tv_sec; 11192bad8471SEric Van Hensbergen 11202bad8471SEric Van Hensbergen if (iattr->ia_valid & ATTR_SIZE) 1121531b1094SLatchesar Ionkov wstat.length = iattr->ia_size; 11222bad8471SEric Van Hensbergen 1123dd6102fbSSripathi Kodi if (v9fs_proto_dotu(v9ses)) { 1124531b1094SLatchesar Ionkov if (iattr->ia_valid & ATTR_UID) 1125531b1094SLatchesar Ionkov wstat.n_uid = iattr->ia_uid; 11262bad8471SEric Van Hensbergen 1127531b1094SLatchesar Ionkov if (iattr->ia_valid & ATTR_GID) 1128531b1094SLatchesar Ionkov wstat.n_gid = iattr->ia_gid; 11292bad8471SEric Van Hensbergen } 1130059c138bSAneesh Kumar K.V 11313dc5436aSAneesh Kumar K.V /* Write all dirty data */ 1132e36cb0b8SDavid Howells if (d_is_reg(dentry)) 113324e42e32SDavid Howells filemap_write_and_wait(inode->i_mapping); 11343dc5436aSAneesh Kumar K.V 1135f10fc50fSAneesh Kumar K.V retval = p9_client_wstat(fid, &wstat); 11366636b6dcSJianyong Wu 11376636b6dcSJianyong Wu if (use_dentry) 11386636b6dcSJianyong Wu p9_client_clunk(fid); 11396636b6dcSJianyong Wu 1140f10fc50fSAneesh Kumar K.V if (retval < 0) 1141f10fc50fSAneesh Kumar K.V return retval; 1142059c138bSAneesh Kumar K.V 1143059c138bSAneesh Kumar K.V if ((iattr->ia_valid & ATTR_SIZE) && 114424e42e32SDavid Howells iattr->ia_size != i_size_read(inode)) { 114524e42e32SDavid Howells truncate_setsize(inode, iattr->ia_size); 114624e42e32SDavid Howells fscache_resize_cookie(v9fs_inode_cookie(v9inode), iattr->ia_size); 114724e42e32SDavid Howells } 1148059c138bSAneesh Kumar K.V 114924e42e32SDavid Howells v9fs_invalidate_inode_attr(inode); 11501025774cSChristoph Hellwig 115124e42e32SDavid Howells setattr_copy(&init_user_ns, inode, iattr); 115224e42e32SDavid Howells mark_inode_dirty(inode); 11531025774cSChristoph Hellwig return 0; 11542bad8471SEric Van Hensbergen } 11552bad8471SEric Van Hensbergen 11562bad8471SEric Van Hensbergen /** 1157531b1094SLatchesar Ionkov * v9fs_stat2inode - populate an inode structure with mistat info 1158531b1094SLatchesar Ionkov * @stat: Plan 9 metadata (mistat) structure 11592bad8471SEric Van Hensbergen * @inode: inode to populate 11602bad8471SEric Van Hensbergen * @sb: superblock of filesystem 11615e3cc1eeSHou Tao * @flags: control flags (e.g. V9FS_STAT2INODE_KEEP_ISIZE) 11622bad8471SEric Van Hensbergen * 11632bad8471SEric Van Hensbergen */ 11642bad8471SEric Van Hensbergen 11652bad8471SEric Van Hensbergen void 116651a87c55SEric Van Hensbergen v9fs_stat2inode(struct p9_wstat *stat, struct inode *inode, 11675e3cc1eeSHou Tao struct super_block *sb, unsigned int flags) 11682bad8471SEric Van Hensbergen { 11693eda0de6SAl Viro umode_t mode; 11702bad8471SEric Van Hensbergen struct v9fs_session_info *v9ses = sb->s_fs_info; 1171b3cbea03SAneesh Kumar K.V struct v9fs_inode *v9inode = V9FS_I(inode); 11722bad8471SEric Van Hensbergen 1173bfe86848SMiklos Szeredi set_nlink(inode, 1); 11742bad8471SEric Van Hensbergen 1175531b1094SLatchesar Ionkov inode->i_atime.tv_sec = stat->atime; 1176531b1094SLatchesar Ionkov inode->i_mtime.tv_sec = stat->mtime; 1177531b1094SLatchesar Ionkov inode->i_ctime.tv_sec = stat->mtime; 11782bad8471SEric Van Hensbergen 1179bd32b82dSLatchesar Ionkov inode->i_uid = v9ses->dfltuid; 1180bd32b82dSLatchesar Ionkov inode->i_gid = v9ses->dfltgid; 11812bad8471SEric Van Hensbergen 1182dd6102fbSSripathi Kodi if (v9fs_proto_dotu(v9ses)) { 1183531b1094SLatchesar Ionkov inode->i_uid = stat->n_uid; 1184531b1094SLatchesar Ionkov inode->i_gid = stat->n_gid; 1185531b1094SLatchesar Ionkov } 11865717144aSAneesh Kumar K.V if ((S_ISREG(inode->i_mode)) || (S_ISDIR(inode->i_mode))) { 11879652c732SAl Viro if (v9fs_proto_dotu(v9ses)) { 11889652c732SAl Viro unsigned int i_nlink; 11895717144aSAneesh Kumar K.V /* 11909652c732SAl Viro * Hadlink support got added later to the .u extension. 11919652c732SAl Viro * So there can be a server out there that doesn't 11929652c732SAl Viro * support this even with .u extension. That would 11939652c732SAl Viro * just leave us with stat->extension being an empty 11949652c732SAl Viro * string, though. 11955717144aSAneesh Kumar K.V */ 11965717144aSAneesh Kumar K.V /* HARDLINKCOUNT %u */ 11979652c732SAl Viro if (sscanf(stat->extension, 11989652c732SAl Viro " HARDLINKCOUNT %u", &i_nlink) == 1) 1199bfe86848SMiklos Szeredi set_nlink(inode, i_nlink); 12005717144aSAneesh Kumar K.V } 12015717144aSAneesh Kumar K.V } 1202df345c67SAneesh Kumar K.V mode = p9mode2perm(v9ses, stat); 120345089142SAneesh Kumar K.V mode |= inode->i_mode & ~S_IALLUGO; 120445089142SAneesh Kumar K.V inode->i_mode = mode; 12052bad8471SEric Van Hensbergen 12065e3cc1eeSHou Tao if (!(flags & V9FS_STAT2INODE_KEEP_ISIZE)) 12075e3cc1eeSHou Tao v9fs_i_size_write(inode, stat->length); 1208bd238fb4SLatchesar Ionkov /* not real number of blocks, but 512 byte ones ... */ 12095e3cc1eeSHou Tao inode->i_blocks = (stat->length + 512 - 1) >> 9; 1210b3cbea03SAneesh Kumar K.V v9inode->cache_validity &= ~V9FS_INO_INVALID_ATTR; 12112bad8471SEric Van Hensbergen } 12122bad8471SEric Van Hensbergen 12132bad8471SEric Van Hensbergen /** 12142bad8471SEric Van Hensbergen * v9fs_qid2ino - convert qid into inode number 12152bad8471SEric Van Hensbergen * @qid: qid to hash 12162bad8471SEric Van Hensbergen * 12172bad8471SEric Van Hensbergen * BUG: potential for inode number collisions? 12182bad8471SEric Van Hensbergen */ 12192bad8471SEric Van Hensbergen 1220bd238fb4SLatchesar Ionkov ino_t v9fs_qid2ino(struct p9_qid *qid) 12212bad8471SEric Van Hensbergen { 12222bad8471SEric Van Hensbergen u64 path = qid->path + 2; 12232bad8471SEric Van Hensbergen ino_t i = 0; 12242bad8471SEric Van Hensbergen 12252bad8471SEric Van Hensbergen if (sizeof(ino_t) == sizeof(path)) 12262bad8471SEric Van Hensbergen memcpy(&i, &path, sizeof(ino_t)); 12272bad8471SEric Van Hensbergen else 12282bad8471SEric Van Hensbergen i = (ino_t) (path ^ (path >> 32)); 12292bad8471SEric Van Hensbergen 12302bad8471SEric Van Hensbergen return i; 12312bad8471SEric Van Hensbergen } 12322bad8471SEric Van Hensbergen 12332bad8471SEric Van Hensbergen /** 12346b255391SAl Viro * v9fs_vfs_get_link - follow a symlink path 12352bad8471SEric Van Hensbergen * @dentry: dentry for symlink 12366b255391SAl Viro * @inode: inode for symlink 1237fceef393SAl Viro * @done: delayed call for when we are done with the return value 12382bad8471SEric Van Hensbergen */ 12392bad8471SEric Van Hensbergen 12406b255391SAl Viro static const char *v9fs_vfs_get_link(struct dentry *dentry, 1241fceef393SAl Viro struct inode *inode, 1242fceef393SAl Viro struct delayed_call *done) 12432bad8471SEric Van Hensbergen { 12446b255391SAl Viro struct v9fs_session_info *v9ses; 12456b255391SAl Viro struct p9_fid *fid; 124690e4fc88SAl Viro struct p9_wstat *st; 1247680baacbSAl Viro char *res; 12482bad8471SEric Van Hensbergen 12496b255391SAl Viro if (!dentry) 12506b255391SAl Viro return ERR_PTR(-ECHILD); 12516b255391SAl Viro 12526b255391SAl Viro v9ses = v9fs_dentry2v9ses(dentry); 12536b255391SAl Viro fid = v9fs_fid_lookup(dentry); 12544b8e9923SAl Viro p9_debug(P9_DEBUG_VFS, "%pd\n", dentry); 12552bad8471SEric Van Hensbergen 125690e4fc88SAl Viro if (IS_ERR(fid)) 125790e4fc88SAl Viro return ERR_CAST(fid); 12582bad8471SEric Van Hensbergen 125990e4fc88SAl Viro if (!v9fs_proto_dotu(v9ses)) 126090e4fc88SAl Viro return ERR_PTR(-EBADF); 126190e4fc88SAl Viro 126290e4fc88SAl Viro st = p9_client_stat(fid); 12636636b6dcSJianyong Wu p9_client_clunk(fid); 126490e4fc88SAl Viro if (IS_ERR(st)) 126590e4fc88SAl Viro return ERR_CAST(st); 126690e4fc88SAl Viro 126790e4fc88SAl Viro if (!(st->mode & P9_DMSYMLINK)) { 126890e4fc88SAl Viro p9stat_free(st); 126990e4fc88SAl Viro kfree(st); 127090e4fc88SAl Viro return ERR_PTR(-EINVAL); 12712bad8471SEric Van Hensbergen } 1272680baacbSAl Viro res = st->extension; 127390e4fc88SAl Viro st->extension = NULL; 1274680baacbSAl Viro if (strlen(res) >= PATH_MAX) 1275680baacbSAl Viro res[PATH_MAX - 1] = '\0'; 1276680baacbSAl Viro 127790e4fc88SAl Viro p9stat_free(st); 127890e4fc88SAl Viro kfree(st); 1279fceef393SAl Viro set_delayed_call(done, kfree_link, res); 1280fceef393SAl Viro return res; 12812bad8471SEric Van Hensbergen } 12822bad8471SEric Van Hensbergen 12832bad8471SEric Van Hensbergen /** 1284ee443996SEric Van Hensbergen * v9fs_vfs_mkspecial - create a special file 1285ee443996SEric Van Hensbergen * @dir: inode to create special file in 1286ee443996SEric Van Hensbergen * @dentry: dentry to create 1287fd2916bdSFabian Frederick * @perm: mode to create special file 1288ee443996SEric Van Hensbergen * @extension: 9p2000.u format extension string representing special file 1289ee443996SEric Van Hensbergen * 1290ee443996SEric Van Hensbergen */ 1291ee443996SEric Van Hensbergen 1292531b1094SLatchesar Ionkov static int v9fs_vfs_mkspecial(struct inode *dir, struct dentry *dentry, 1293c2837de7SAl Viro u32 perm, const char *extension) 1294531b1094SLatchesar Ionkov { 1295bd238fb4SLatchesar Ionkov struct p9_fid *fid; 1296d28c61f0SAneesh Kumar K.V struct v9fs_session_info *v9ses; 1297531b1094SLatchesar Ionkov 12986a3124a3SLatchesar Ionkov v9ses = v9fs_inode2v9ses(dir); 1299dd6102fbSSripathi Kodi if (!v9fs_proto_dotu(v9ses)) { 13005d385153SJoe Perches p9_debug(P9_DEBUG_ERROR, "not extended\n"); 13016a3124a3SLatchesar Ionkov return -EPERM; 1302531b1094SLatchesar Ionkov } 1303531b1094SLatchesar Ionkov 1304bd238fb4SLatchesar Ionkov fid = v9fs_create(v9ses, dir, dentry, (char *) extension, perm, 1305bd238fb4SLatchesar Ionkov P9_OREAD); 1306bd238fb4SLatchesar Ionkov if (IS_ERR(fid)) 1307bd238fb4SLatchesar Ionkov return PTR_ERR(fid); 1308da977b2cSEric Van Hensbergen 1309d28c61f0SAneesh Kumar K.V v9fs_invalidate_inode_attr(dir); 1310bd238fb4SLatchesar Ionkov p9_client_clunk(fid); 13116a3124a3SLatchesar Ionkov return 0; 1312531b1094SLatchesar Ionkov } 1313531b1094SLatchesar Ionkov 1314531b1094SLatchesar Ionkov /** 1315531b1094SLatchesar Ionkov * v9fs_vfs_symlink - helper function to create symlinks 1316bc868036SDavid Howells * @mnt_userns: The user namespace of the mount 1317531b1094SLatchesar Ionkov * @dir: directory inode containing symlink 1318531b1094SLatchesar Ionkov * @dentry: dentry for symlink 1319531b1094SLatchesar Ionkov * @symname: symlink data 1320531b1094SLatchesar Ionkov * 1321ee443996SEric Van Hensbergen * See Also: 9P2000.u RFC for more information 1322531b1094SLatchesar Ionkov * 1323531b1094SLatchesar Ionkov */ 1324531b1094SLatchesar Ionkov 1325531b1094SLatchesar Ionkov static int 1326549c7297SChristian Brauner v9fs_vfs_symlink(struct user_namespace *mnt_userns, struct inode *dir, 1327549c7297SChristian Brauner struct dentry *dentry, const char *symname) 1328531b1094SLatchesar Ionkov { 13294b8e9923SAl Viro p9_debug(P9_DEBUG_VFS, " %lu,%pd,%s\n", 13304b8e9923SAl Viro dir->i_ino, dentry, symname); 1331531b1094SLatchesar Ionkov 1332c2837de7SAl Viro return v9fs_vfs_mkspecial(dir, dentry, P9_DMSYMLINK, symname); 1333531b1094SLatchesar Ionkov } 1334531b1094SLatchesar Ionkov 1335b46c267eSAl Viro #define U32_MAX_DIGITS 10 1336b46c267eSAl Viro 13372bad8471SEric Van Hensbergen /** 13382bad8471SEric Van Hensbergen * v9fs_vfs_link - create a hardlink 13392bad8471SEric Van Hensbergen * @old_dentry: dentry for file to link to 13402bad8471SEric Van Hensbergen * @dir: inode destination for new link 134173c592b9SEric Van Hensbergen * @dentry: dentry for link 13422bad8471SEric Van Hensbergen * 13432bad8471SEric Van Hensbergen */ 13442bad8471SEric Van Hensbergen 13452bad8471SEric Van Hensbergen static int 13462bad8471SEric Van Hensbergen v9fs_vfs_link(struct dentry *old_dentry, struct inode *dir, 13472bad8471SEric Van Hensbergen struct dentry *dentry) 13482bad8471SEric Van Hensbergen { 1349531b1094SLatchesar Ionkov int retval; 1350b46c267eSAl Viro char name[1 + U32_MAX_DIGITS + 2]; /* sign + number + \n + \0 */ 1351d28c61f0SAneesh Kumar K.V struct p9_fid *oldfid; 13522bad8471SEric Van Hensbergen 13534b8e9923SAl Viro p9_debug(P9_DEBUG_VFS, " %lu,%pd,%pd\n", 13544b8e9923SAl Viro dir->i_ino, dentry, old_dentry); 13552bad8471SEric Van Hensbergen 1356da977b2cSEric Van Hensbergen oldfid = v9fs_fid_clone(old_dentry); 1357da977b2cSEric Van Hensbergen if (IS_ERR(oldfid)) 1358da977b2cSEric Van Hensbergen return PTR_ERR(oldfid); 13592bad8471SEric Van Hensbergen 136016cce6d2SLatchesar Ionkov sprintf(name, "%d\n", oldfid->fid); 1361bd238fb4SLatchesar Ionkov retval = v9fs_vfs_mkspecial(dir, dentry, P9_DMLINK, name); 1362c06c066aSAneesh Kumar K.V if (!retval) { 13632b0143b5SDavid Howells v9fs_refresh_inode(oldfid, d_inode(old_dentry)); 1364d28c61f0SAneesh Kumar K.V v9fs_invalidate_inode_attr(dir); 1365c06c066aSAneesh Kumar K.V } 1366bd238fb4SLatchesar Ionkov p9_client_clunk(oldfid); 13672bad8471SEric Van Hensbergen return retval; 13682bad8471SEric Van Hensbergen } 13692bad8471SEric Van Hensbergen 13702bad8471SEric Van Hensbergen /** 13712bad8471SEric Van Hensbergen * v9fs_vfs_mknod - create a special file 1372bc868036SDavid Howells * @mnt_userns: The user namespace of the mount 13732bad8471SEric Van Hensbergen * @dir: inode destination for new link 13742bad8471SEric Van Hensbergen * @dentry: dentry for file 13752bad8471SEric Van Hensbergen * @mode: mode for creation 1376ee443996SEric Van Hensbergen * @rdev: device associated with special file 13772bad8471SEric Van Hensbergen * 13782bad8471SEric Van Hensbergen */ 13792bad8471SEric Van Hensbergen 13802bad8471SEric Van Hensbergen static int 1381549c7297SChristian Brauner v9fs_vfs_mknod(struct user_namespace *mnt_userns, struct inode *dir, 1382549c7297SChristian Brauner struct dentry *dentry, umode_t mode, dev_t rdev) 13832bad8471SEric Van Hensbergen { 1384c2837de7SAl Viro struct v9fs_session_info *v9ses = v9fs_inode2v9ses(dir); 1385531b1094SLatchesar Ionkov int retval; 1386b46c267eSAl Viro char name[2 + U32_MAX_DIGITS + 1 + U32_MAX_DIGITS + 1]; 1387c2837de7SAl Viro u32 perm; 13882bad8471SEric Van Hensbergen 13896e195b0fSDominique Martinet p9_debug(P9_DEBUG_VFS, " %lu,%pd mode: %x MAJOR: %u MINOR: %u\n", 13904b8e9923SAl Viro dir->i_ino, dentry, mode, 13915d385153SJoe Perches MAJOR(rdev), MINOR(rdev)); 13922bad8471SEric Van Hensbergen 13932bad8471SEric Van Hensbergen /* build extension */ 13942bad8471SEric Van Hensbergen if (S_ISBLK(mode)) 1395531b1094SLatchesar Ionkov sprintf(name, "b %u %u", MAJOR(rdev), MINOR(rdev)); 13962bad8471SEric Van Hensbergen else if (S_ISCHR(mode)) 1397531b1094SLatchesar Ionkov sprintf(name, "c %u %u", MAJOR(rdev), MINOR(rdev)); 1398b46c267eSAl Viro else 1399531b1094SLatchesar Ionkov *name = 0; 14002bad8471SEric Van Hensbergen 1401c2837de7SAl Viro perm = unixmode2p9mode(v9ses, mode); 1402c2837de7SAl Viro retval = v9fs_vfs_mkspecial(dir, dentry, perm, name); 14032bad8471SEric Van Hensbergen 14042bad8471SEric Van Hensbergen return retval; 14052bad8471SEric Van Hensbergen } 14062bad8471SEric Van Hensbergen 1407b3cbea03SAneesh Kumar K.V int v9fs_refresh_inode(struct p9_fid *fid, struct inode *inode) 1408b3cbea03SAneesh Kumar K.V { 140945089142SAneesh Kumar K.V int umode; 141045089142SAneesh Kumar K.V dev_t rdev; 1411b3cbea03SAneesh Kumar K.V struct p9_wstat *st; 1412b3cbea03SAneesh Kumar K.V struct v9fs_session_info *v9ses; 14135e3cc1eeSHou Tao unsigned int flags; 1414b3cbea03SAneesh Kumar K.V 1415b3cbea03SAneesh Kumar K.V v9ses = v9fs_inode2v9ses(inode); 1416b3cbea03SAneesh Kumar K.V st = p9_client_stat(fid); 1417b3cbea03SAneesh Kumar K.V if (IS_ERR(st)) 1418b3cbea03SAneesh Kumar K.V return PTR_ERR(st); 141945089142SAneesh Kumar K.V /* 142045089142SAneesh Kumar K.V * Don't update inode if the file type is different 142145089142SAneesh Kumar K.V */ 142245089142SAneesh Kumar K.V umode = p9mode2unixmode(v9ses, st, &rdev); 14236e3e2c43SAl Viro if (inode_wrong_type(inode, umode)) 142445089142SAneesh Kumar K.V goto out; 1425b3cbea03SAneesh Kumar K.V 1426b3cbea03SAneesh Kumar K.V /* 1427b3cbea03SAneesh Kumar K.V * We don't want to refresh inode->i_size, 1428b3cbea03SAneesh Kumar K.V * because we may have cached data 1429b3cbea03SAneesh Kumar K.V */ 14305e3cc1eeSHou Tao flags = (v9ses->cache == CACHE_LOOSE || v9ses->cache == CACHE_FSCACHE) ? 14315e3cc1eeSHou Tao V9FS_STAT2INODE_KEEP_ISIZE : 0; 14325e3cc1eeSHou Tao v9fs_stat2inode(st, inode, inode->i_sb, flags); 143345089142SAneesh Kumar K.V out: 1434b3cbea03SAneesh Kumar K.V p9stat_free(st); 1435b3cbea03SAneesh Kumar K.V kfree(st); 1436b3cbea03SAneesh Kumar K.V return 0; 1437b3cbea03SAneesh Kumar K.V } 1438b3cbea03SAneesh Kumar K.V 14399b6533c9SSripathi Kodi static const struct inode_operations v9fs_dir_inode_operations_dotu = { 14409b6533c9SSripathi Kodi .create = v9fs_vfs_create, 14419b6533c9SSripathi Kodi .lookup = v9fs_vfs_lookup, 1442e43ae79cSMiklos Szeredi .atomic_open = v9fs_vfs_atomic_open, 14439b6533c9SSripathi Kodi .symlink = v9fs_vfs_symlink, 144450cc42ffSVenkateswararao Jujjuri (JV) .link = v9fs_vfs_link, 14459b6533c9SSripathi Kodi .unlink = v9fs_vfs_unlink, 14469b6533c9SSripathi Kodi .mkdir = v9fs_vfs_mkdir, 14479b6533c9SSripathi Kodi .rmdir = v9fs_vfs_rmdir, 14481d76e313SAneesh Kumar K.V .mknod = v9fs_vfs_mknod, 14499b6533c9SSripathi Kodi .rename = v9fs_vfs_rename, 14509b6533c9SSripathi Kodi .getattr = v9fs_vfs_getattr, 14519b6533c9SSripathi Kodi .setattr = v9fs_vfs_setattr, 14529b6533c9SSripathi Kodi }; 14539b6533c9SSripathi Kodi 1454754661f1SArjan van de Ven static const struct inode_operations v9fs_dir_inode_operations = { 1455b501611aSEric Van Hensbergen .create = v9fs_vfs_create, 1456b501611aSEric Van Hensbergen .lookup = v9fs_vfs_lookup, 1457e43ae79cSMiklos Szeredi .atomic_open = v9fs_vfs_atomic_open, 1458b501611aSEric Van Hensbergen .unlink = v9fs_vfs_unlink, 1459b501611aSEric Van Hensbergen .mkdir = v9fs_vfs_mkdir, 1460b501611aSEric Van Hensbergen .rmdir = v9fs_vfs_rmdir, 1461b501611aSEric Van Hensbergen .mknod = v9fs_vfs_mknod, 1462b501611aSEric Van Hensbergen .rename = v9fs_vfs_rename, 1463b501611aSEric Van Hensbergen .getattr = v9fs_vfs_getattr, 1464b501611aSEric Van Hensbergen .setattr = v9fs_vfs_setattr, 1465b501611aSEric Van Hensbergen }; 1466b501611aSEric Van Hensbergen 1467754661f1SArjan van de Ven static const struct inode_operations v9fs_file_inode_operations = { 14682bad8471SEric Van Hensbergen .getattr = v9fs_vfs_getattr, 14692bad8471SEric Van Hensbergen .setattr = v9fs_vfs_setattr, 14702bad8471SEric Van Hensbergen }; 14712bad8471SEric Van Hensbergen 1472754661f1SArjan van de Ven static const struct inode_operations v9fs_symlink_inode_operations = { 14736b255391SAl Viro .get_link = v9fs_vfs_get_link, 14742bad8471SEric Van Hensbergen .getattr = v9fs_vfs_getattr, 14752bad8471SEric Van Hensbergen .setattr = v9fs_vfs_setattr, 14762bad8471SEric Van Hensbergen }; 14779b6533c9SSripathi Kodi 1478