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> 20e8edc6e0SAlexey Dobriyan #include <linux/sched.h> 215a0e3ad6STejun Heo #include <linux/slab.h> 22ebf46264SAneesh Kumar K.V #include <linux/xattr.h> 2385ff872dSAneesh Kumar K.V #include <linux/posix_acl.h> 24bd238fb4SLatchesar Ionkov #include <net/9p/9p.h> 25bd238fb4SLatchesar Ionkov #include <net/9p/client.h> 262bad8471SEric Van Hensbergen 272bad8471SEric Van Hensbergen #include "v9fs.h" 282bad8471SEric Van Hensbergen #include "v9fs_vfs.h" 292bad8471SEric Van Hensbergen #include "fid.h" 3060e78d2cSAbhishek Kulkarni #include "cache.h" 31ebf46264SAneesh Kumar K.V #include "xattr.h" 3285ff872dSAneesh Kumar K.V #include "acl.h" 332bad8471SEric Van Hensbergen 34754661f1SArjan van de Ven static const struct inode_operations v9fs_dir_inode_operations; 359b6533c9SSripathi Kodi static const struct inode_operations v9fs_dir_inode_operations_dotu; 36754661f1SArjan van de Ven static const struct inode_operations v9fs_file_inode_operations; 37754661f1SArjan van de Ven static const struct inode_operations v9fs_symlink_inode_operations; 38f5fc6145SAneesh Kumar K.V 392bad8471SEric Van Hensbergen /** 402bad8471SEric Van Hensbergen * unixmode2p9mode - convert unix mode bits to plan 9 412bad8471SEric Van Hensbergen * @v9ses: v9fs session information 422bad8471SEric Van Hensbergen * @mode: mode to convert 432bad8471SEric Van Hensbergen * 442bad8471SEric Van Hensbergen */ 452bad8471SEric Van Hensbergen 463eda0de6SAl Viro static u32 unixmode2p9mode(struct v9fs_session_info *v9ses, umode_t mode) 472bad8471SEric Van Hensbergen { 482bad8471SEric Van Hensbergen int res; 496e195b0fSDominique Martinet 502bad8471SEric Van Hensbergen res = mode & 0777; 512bad8471SEric Van Hensbergen if (S_ISDIR(mode)) 52bd238fb4SLatchesar Ionkov res |= P9_DMDIR; 53dd6102fbSSripathi Kodi if (v9fs_proto_dotu(v9ses)) { 542bad8471SEric Van Hensbergen if (v9ses->nodev == 0) { 552bad8471SEric Van Hensbergen if (S_ISSOCK(mode)) 56bd238fb4SLatchesar Ionkov res |= P9_DMSOCKET; 572bad8471SEric Van Hensbergen if (S_ISFIFO(mode)) 58bd238fb4SLatchesar Ionkov res |= P9_DMNAMEDPIPE; 592bad8471SEric Van Hensbergen if (S_ISBLK(mode)) 60bd238fb4SLatchesar Ionkov res |= P9_DMDEVICE; 612bad8471SEric Van Hensbergen if (S_ISCHR(mode)) 62bd238fb4SLatchesar Ionkov res |= P9_DMDEVICE; 632bad8471SEric Van Hensbergen } 642bad8471SEric Van Hensbergen 652bad8471SEric Van Hensbergen if ((mode & S_ISUID) == S_ISUID) 66bd238fb4SLatchesar Ionkov res |= P9_DMSETUID; 672bad8471SEric Van Hensbergen if ((mode & S_ISGID) == S_ISGID) 68bd238fb4SLatchesar Ionkov res |= P9_DMSETGID; 69d199d652SAnthony Liguori if ((mode & S_ISVTX) == S_ISVTX) 70d199d652SAnthony Liguori res |= P9_DMSETVTX; 712bad8471SEric Van Hensbergen } 722bad8471SEric Van Hensbergen return res; 732bad8471SEric Van Hensbergen } 742bad8471SEric Van Hensbergen 752bad8471SEric Van Hensbergen /** 76df345c67SAneesh Kumar K.V * p9mode2perm- convert plan9 mode bits to unix permission bits 77df345c67SAneesh Kumar K.V * @v9ses: v9fs session information 78df345c67SAneesh Kumar K.V * @stat: p9_wstat from which mode need to be derived 79df345c67SAneesh Kumar K.V * 80df345c67SAneesh Kumar K.V */ 81df345c67SAneesh Kumar K.V static int p9mode2perm(struct v9fs_session_info *v9ses, 82df345c67SAneesh Kumar K.V struct p9_wstat *stat) 83df345c67SAneesh Kumar K.V { 84df345c67SAneesh Kumar K.V int res; 85df345c67SAneesh Kumar K.V int mode = stat->mode; 86df345c67SAneesh Kumar K.V 87df345c67SAneesh Kumar K.V res = mode & S_IALLUGO; 88df345c67SAneesh Kumar K.V if (v9fs_proto_dotu(v9ses)) { 89df345c67SAneesh Kumar K.V if ((mode & P9_DMSETUID) == P9_DMSETUID) 90df345c67SAneesh Kumar K.V res |= S_ISUID; 91df345c67SAneesh Kumar K.V 92df345c67SAneesh Kumar K.V if ((mode & P9_DMSETGID) == P9_DMSETGID) 93df345c67SAneesh Kumar K.V res |= S_ISGID; 94df345c67SAneesh Kumar K.V 95df345c67SAneesh Kumar K.V if ((mode & P9_DMSETVTX) == P9_DMSETVTX) 96df345c67SAneesh Kumar K.V res |= S_ISVTX; 97df345c67SAneesh Kumar K.V } 98df345c67SAneesh Kumar K.V return res; 99df345c67SAneesh Kumar K.V } 100df345c67SAneesh Kumar K.V 101df345c67SAneesh Kumar K.V /** 1022bad8471SEric Van Hensbergen * p9mode2unixmode- convert plan9 mode bits to unix mode bits 1032bad8471SEric Van Hensbergen * @v9ses: v9fs session information 10445089142SAneesh Kumar K.V * @stat: p9_wstat from which mode need to be derived 10545089142SAneesh Kumar K.V * @rdev: major number, minor number in case of device files. 1062bad8471SEric Van Hensbergen * 1072bad8471SEric Van Hensbergen */ 1083eda0de6SAl Viro static umode_t p9mode2unixmode(struct v9fs_session_info *v9ses, 10945089142SAneesh Kumar K.V struct p9_wstat *stat, dev_t *rdev) 1102bad8471SEric Van Hensbergen { 11105f975cdSDominique Martinet int res, r; 1123eda0de6SAl Viro u32 mode = stat->mode; 1132bad8471SEric Van Hensbergen 11445089142SAneesh Kumar K.V *rdev = 0; 115df345c67SAneesh Kumar K.V res = p9mode2perm(v9ses, stat); 1162bad8471SEric Van Hensbergen 117bd238fb4SLatchesar Ionkov if ((mode & P9_DMDIR) == P9_DMDIR) 1182bad8471SEric Van Hensbergen res |= S_IFDIR; 119dd6102fbSSripathi Kodi else if ((mode & P9_DMSYMLINK) && (v9fs_proto_dotu(v9ses))) 1202bad8471SEric Van Hensbergen res |= S_IFLNK; 121dd6102fbSSripathi Kodi else if ((mode & P9_DMSOCKET) && (v9fs_proto_dotu(v9ses)) 1222bad8471SEric Van Hensbergen && (v9ses->nodev == 0)) 1232bad8471SEric Van Hensbergen res |= S_IFSOCK; 124dd6102fbSSripathi Kodi else if ((mode & P9_DMNAMEDPIPE) && (v9fs_proto_dotu(v9ses)) 1252bad8471SEric Van Hensbergen && (v9ses->nodev == 0)) 1262bad8471SEric Van Hensbergen res |= S_IFIFO; 127dd6102fbSSripathi Kodi else if ((mode & P9_DMDEVICE) && (v9fs_proto_dotu(v9ses)) 12845089142SAneesh Kumar K.V && (v9ses->nodev == 0)) { 12905f975cdSDominique Martinet char type = 0; 13045089142SAneesh Kumar K.V int major = -1, minor = -1; 13145089142SAneesh Kumar K.V 13205f975cdSDominique Martinet r = sscanf(stat->extension, "%c %i %i", &type, &major, &minor); 13305f975cdSDominique Martinet if (r != 3) { 13405f975cdSDominique Martinet p9_debug(P9_DEBUG_ERROR, 13505f975cdSDominique Martinet "invalid device string, umode will be bogus: %s\n", 13605f975cdSDominique Martinet stat->extension); 13705f975cdSDominique Martinet return res; 13805f975cdSDominique Martinet } 13945089142SAneesh Kumar K.V switch (type) { 14045089142SAneesh Kumar K.V case 'c': 14145089142SAneesh Kumar K.V res |= S_IFCHR; 14245089142SAneesh Kumar K.V break; 14345089142SAneesh Kumar K.V case 'b': 1442bad8471SEric Van Hensbergen res |= S_IFBLK; 14545089142SAneesh Kumar K.V break; 14645089142SAneesh Kumar K.V default: 1475d385153SJoe Perches p9_debug(P9_DEBUG_ERROR, "Unknown special type %c %s\n", 1485d385153SJoe Perches type, stat->extension); 14951958817Szhengbin } 15045089142SAneesh Kumar K.V *rdev = MKDEV(major, minor); 15145089142SAneesh Kumar K.V } else 1522bad8471SEric Van Hensbergen res |= S_IFREG; 1532bad8471SEric Van Hensbergen 1542bad8471SEric Van Hensbergen return res; 1552bad8471SEric Van Hensbergen } 1562bad8471SEric Van Hensbergen 157ee443996SEric Van Hensbergen /** 158ee443996SEric Van Hensbergen * v9fs_uflags2omode- convert posix open flags to plan 9 mode bits 159ee443996SEric Van Hensbergen * @uflags: flags to convert 1602e4bef41SEric Van Hensbergen * @extended: if .u extensions are active 161ee443996SEric Van Hensbergen */ 162ee443996SEric Van Hensbergen 1632e4bef41SEric Van Hensbergen int v9fs_uflags2omode(int uflags, int extended) 1646a3124a3SLatchesar Ionkov { 1656a3124a3SLatchesar Ionkov int ret; 1666a3124a3SLatchesar Ionkov 1676a3124a3SLatchesar Ionkov ret = 0; 1686a3124a3SLatchesar Ionkov switch (uflags&3) { 1696a3124a3SLatchesar Ionkov default: 1706a3124a3SLatchesar Ionkov case O_RDONLY: 171bd238fb4SLatchesar Ionkov ret = P9_OREAD; 1726a3124a3SLatchesar Ionkov break; 1736a3124a3SLatchesar Ionkov 1746a3124a3SLatchesar Ionkov case O_WRONLY: 175bd238fb4SLatchesar Ionkov ret = P9_OWRITE; 1766a3124a3SLatchesar Ionkov break; 1776a3124a3SLatchesar Ionkov 1786a3124a3SLatchesar Ionkov case O_RDWR: 179bd238fb4SLatchesar Ionkov ret = P9_ORDWR; 1806a3124a3SLatchesar Ionkov break; 1816a3124a3SLatchesar Ionkov } 1826a3124a3SLatchesar Ionkov 1832e4bef41SEric Van Hensbergen if (extended) { 1842e4bef41SEric Van Hensbergen if (uflags & O_EXCL) 1852e4bef41SEric Van Hensbergen ret |= P9_OEXCL; 1862e4bef41SEric Van Hensbergen 1876a3124a3SLatchesar Ionkov if (uflags & O_APPEND) 188bd238fb4SLatchesar Ionkov ret |= P9_OAPPEND; 1892e4bef41SEric Van Hensbergen } 1906a3124a3SLatchesar Ionkov 1916a3124a3SLatchesar Ionkov return ret; 1926a3124a3SLatchesar Ionkov } 1936a3124a3SLatchesar Ionkov 1942bad8471SEric Van Hensbergen /** 195531b1094SLatchesar Ionkov * v9fs_blank_wstat - helper function to setup a 9P stat structure 196531b1094SLatchesar Ionkov * @wstat: structure to initialize 1972bad8471SEric Van Hensbergen * 1982bad8471SEric Van Hensbergen */ 1992bad8471SEric Van Hensbergen 2007a4439c4SM. Mohan Kumar void 201bd238fb4SLatchesar Ionkov v9fs_blank_wstat(struct p9_wstat *wstat) 2022bad8471SEric Van Hensbergen { 203531b1094SLatchesar Ionkov wstat->type = ~0; 204531b1094SLatchesar Ionkov wstat->dev = ~0; 205531b1094SLatchesar Ionkov wstat->qid.type = ~0; 206531b1094SLatchesar Ionkov wstat->qid.version = ~0; 207531b1094SLatchesar Ionkov *((long long *)&wstat->qid.path) = ~0; 208531b1094SLatchesar Ionkov wstat->mode = ~0; 209531b1094SLatchesar Ionkov wstat->atime = ~0; 210531b1094SLatchesar Ionkov wstat->mtime = ~0; 211531b1094SLatchesar Ionkov wstat->length = ~0; 212531b1094SLatchesar Ionkov wstat->name = NULL; 213531b1094SLatchesar Ionkov wstat->uid = NULL; 214531b1094SLatchesar Ionkov wstat->gid = NULL; 215531b1094SLatchesar Ionkov wstat->muid = NULL; 216447c5094SEric W. Biederman wstat->n_uid = INVALID_UID; 217447c5094SEric W. Biederman wstat->n_gid = INVALID_GID; 218447c5094SEric W. Biederman wstat->n_muid = INVALID_UID; 219531b1094SLatchesar Ionkov wstat->extension = NULL; 2202bad8471SEric Van Hensbergen } 2212bad8471SEric Van Hensbergen 22260e78d2cSAbhishek Kulkarni /** 22360e78d2cSAbhishek Kulkarni * v9fs_alloc_inode - helper function to allocate an inode 224bc868036SDavid Howells * @sb: The superblock to allocate the inode from 22560e78d2cSAbhishek Kulkarni */ 22660e78d2cSAbhishek Kulkarni struct inode *v9fs_alloc_inode(struct super_block *sb) 22760e78d2cSAbhishek Kulkarni { 228a78ce05dSAneesh Kumar K.V struct v9fs_inode *v9inode; 2296e195b0fSDominique Martinet 230fd60b288SMuchun Song v9inode = alloc_inode_sb(sb, v9fs_inode_cache, GFP_KERNEL); 231a78ce05dSAneesh Kumar K.V if (!v9inode) 23260e78d2cSAbhishek Kulkarni return NULL; 2336b39f6d2SAneesh Kumar K.V v9inode->writeback_fid = NULL; 234b3cbea03SAneesh Kumar K.V v9inode->cache_validity = 0; 2355a7e0a8cSAneesh Kumar K.V mutex_init(&v9inode->v_mutex); 236874c8ca1SDavid Howells return &v9inode->netfs.inode; 23760e78d2cSAbhishek Kulkarni } 23860e78d2cSAbhishek Kulkarni 23960e78d2cSAbhishek Kulkarni /** 2405e8a0770SAl Viro * v9fs_free_inode - destroy an inode 241bc868036SDavid Howells * @inode: The inode to be freed 24260e78d2cSAbhishek Kulkarni */ 24360e78d2cSAbhishek Kulkarni 2445e8a0770SAl Viro void v9fs_free_inode(struct inode *inode) 245fa0d7e3dSNick Piggin { 246a78ce05dSAneesh Kumar K.V kmem_cache_free(v9fs_inode_cache, V9FS_I(inode)); 247fa0d7e3dSNick Piggin } 248fa0d7e3dSNick Piggin 249bc899ee1SDavid Howells /* 250bc899ee1SDavid Howells * Set parameters for the netfs library 251bc899ee1SDavid Howells */ 252bc899ee1SDavid Howells static void v9fs_set_netfs_context(struct inode *inode) 253bc899ee1SDavid Howells { 254e81fb419SLinus Torvalds struct v9fs_inode *v9inode = V9FS_I(inode); 255e81fb419SLinus Torvalds netfs_inode_init(&v9inode->netfs, &v9fs_req_ops); 256bc899ee1SDavid Howells } 257bc899ee1SDavid 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 } 346bc899ee1SDavid Howells 347bc899ee1SDavid 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 */ 401b48dbb99SDominique Martinet p9_fid_put(v9inode->writeback_fid); 4026b39f6d2SAneesh Kumar K.V v9inode->writeback_fid = NULL; 4033cf387d7SAneesh Kumar K.V } 40460e78d2cSAbhishek Kulkarni 405fd2421f5SAneesh Kumar K.V static int v9fs_test_inode(struct inode *inode, void *data) 406fd2421f5SAneesh Kumar K.V { 407fd2421f5SAneesh Kumar K.V int umode; 40845089142SAneesh Kumar K.V dev_t rdev; 409fd2421f5SAneesh Kumar K.V struct v9fs_inode *v9inode = V9FS_I(inode); 410fd2421f5SAneesh Kumar K.V struct p9_wstat *st = (struct p9_wstat *)data; 411fd2421f5SAneesh Kumar K.V struct v9fs_session_info *v9ses = v9fs_inode2v9ses(inode); 412fd2421f5SAneesh Kumar K.V 41345089142SAneesh Kumar K.V umode = p9mode2unixmode(v9ses, st, &rdev); 414fd2421f5SAneesh Kumar K.V /* don't match inode of different type */ 4156e3e2c43SAl Viro if (inode_wrong_type(inode, umode)) 416fd2421f5SAneesh Kumar K.V return 0; 417fd2421f5SAneesh Kumar K.V 418fd2421f5SAneesh Kumar K.V /* compare qid details */ 419fd2421f5SAneesh Kumar K.V if (memcmp(&v9inode->qid.version, 420fd2421f5SAneesh Kumar K.V &st->qid.version, sizeof(v9inode->qid.version))) 421fd2421f5SAneesh Kumar K.V return 0; 422fd2421f5SAneesh Kumar K.V 423fd2421f5SAneesh Kumar K.V if (v9inode->qid.type != st->qid.type) 424fd2421f5SAneesh Kumar K.V return 0; 4258ee03163STuomas Tynkkynen 4268ee03163STuomas Tynkkynen if (v9inode->qid.path != st->qid.path) 4278ee03163STuomas Tynkkynen return 0; 428fd2421f5SAneesh Kumar K.V return 1; 429fd2421f5SAneesh Kumar K.V } 430fd2421f5SAneesh Kumar K.V 431ed80fcfaSAneesh Kumar K.V static int v9fs_test_new_inode(struct inode *inode, void *data) 432ed80fcfaSAneesh Kumar K.V { 433ed80fcfaSAneesh Kumar K.V return 0; 434ed80fcfaSAneesh Kumar K.V } 435ed80fcfaSAneesh Kumar K.V 436fd2421f5SAneesh Kumar K.V static int v9fs_set_inode(struct inode *inode, void *data) 437fd2421f5SAneesh Kumar K.V { 438fd2421f5SAneesh Kumar K.V struct v9fs_inode *v9inode = V9FS_I(inode); 439fd2421f5SAneesh Kumar K.V struct p9_wstat *st = (struct p9_wstat *)data; 440fd2421f5SAneesh Kumar K.V 441fd2421f5SAneesh Kumar K.V memcpy(&v9inode->qid, &st->qid, sizeof(st->qid)); 442fd2421f5SAneesh Kumar K.V return 0; 443fd2421f5SAneesh Kumar K.V } 444fd2421f5SAneesh Kumar K.V 4455ffc0cb3SAneesh Kumar K.V static struct inode *v9fs_qid_iget(struct super_block *sb, 4465ffc0cb3SAneesh Kumar K.V struct p9_qid *qid, 447ed80fcfaSAneesh Kumar K.V struct p9_wstat *st, 448ed80fcfaSAneesh Kumar K.V int new) 4495ffc0cb3SAneesh Kumar K.V { 45045089142SAneesh Kumar K.V dev_t rdev; 4513eda0de6SAl Viro int retval; 4523eda0de6SAl Viro umode_t umode; 4535ffc0cb3SAneesh Kumar K.V unsigned long i_ino; 4545ffc0cb3SAneesh Kumar K.V struct inode *inode; 4555ffc0cb3SAneesh Kumar K.V struct v9fs_session_info *v9ses = sb->s_fs_info; 4566e195b0fSDominique Martinet int (*test)(struct inode *inode, void *data); 457ed80fcfaSAneesh Kumar K.V 458ed80fcfaSAneesh Kumar K.V if (new) 459ed80fcfaSAneesh Kumar K.V test = v9fs_test_new_inode; 460ed80fcfaSAneesh Kumar K.V else 461ed80fcfaSAneesh Kumar K.V test = v9fs_test_inode; 4625ffc0cb3SAneesh Kumar K.V 4635ffc0cb3SAneesh Kumar K.V i_ino = v9fs_qid2ino(qid); 464ed80fcfaSAneesh Kumar K.V inode = iget5_locked(sb, i_ino, test, v9fs_set_inode, st); 4655ffc0cb3SAneesh Kumar K.V if (!inode) 4665ffc0cb3SAneesh Kumar K.V return ERR_PTR(-ENOMEM); 4675ffc0cb3SAneesh Kumar K.V if (!(inode->i_state & I_NEW)) 4685ffc0cb3SAneesh Kumar K.V return inode; 4695ffc0cb3SAneesh Kumar K.V /* 4705ffc0cb3SAneesh Kumar K.V * initialize the inode with the stat info 4715ffc0cb3SAneesh Kumar K.V * FIXME!! we may need support for stale inodes 4725ffc0cb3SAneesh Kumar K.V * later. 4735ffc0cb3SAneesh Kumar K.V */ 474fd2421f5SAneesh Kumar K.V inode->i_ino = i_ino; 47545089142SAneesh Kumar K.V umode = p9mode2unixmode(v9ses, st, &rdev); 47645089142SAneesh Kumar K.V retval = v9fs_init_inode(v9ses, inode, umode, rdev); 4775ffc0cb3SAneesh Kumar K.V if (retval) 4785ffc0cb3SAneesh Kumar K.V goto error; 4795ffc0cb3SAneesh Kumar K.V 4805e3cc1eeSHou Tao v9fs_stat2inode(st, inode, sb, 0); 4815ffc0cb3SAneesh Kumar K.V v9fs_cache_inode_get_cookie(inode); 4825ffc0cb3SAneesh Kumar K.V unlock_new_inode(inode); 4835ffc0cb3SAneesh Kumar K.V return inode; 4845ffc0cb3SAneesh Kumar K.V error: 4850a73d0a2SAl Viro iget_failed(inode); 4865ffc0cb3SAneesh Kumar K.V return ERR_PTR(retval); 4875ffc0cb3SAneesh Kumar K.V 4885ffc0cb3SAneesh Kumar K.V } 4895ffc0cb3SAneesh Kumar K.V 49053c06f4eSAneesh Kumar K.V struct inode * 491a78ce05dSAneesh Kumar K.V v9fs_inode_from_fid(struct v9fs_session_info *v9ses, struct p9_fid *fid, 492ed80fcfaSAneesh Kumar K.V struct super_block *sb, int new) 4936a3124a3SLatchesar Ionkov { 49451a87c55SEric Van Hensbergen struct p9_wstat *st; 4955ffc0cb3SAneesh Kumar K.V struct inode *inode = NULL; 4966a3124a3SLatchesar Ionkov 497bd238fb4SLatchesar Ionkov st = p9_client_stat(fid); 49802bc3567SAbhishek Kulkarni if (IS_ERR(st)) 49902bc3567SAbhishek Kulkarni return ERR_CAST(st); 5002bad8471SEric Van Hensbergen 501ed80fcfaSAneesh Kumar K.V inode = v9fs_qid_iget(sb, &st->qid, st, new); 50202bc3567SAbhishek Kulkarni p9stat_free(st); 503bd238fb4SLatchesar Ionkov kfree(st); 5045ffc0cb3SAneesh Kumar K.V return inode; 5052bad8471SEric Van Hensbergen } 5062bad8471SEric Van Hensbergen 5072bad8471SEric Van Hensbergen /** 508f88657ceSAneesh Kumar K.V * v9fs_at_to_dotl_flags- convert Linux specific AT flags to 509f88657ceSAneesh Kumar K.V * plan 9 AT flag. 510f88657ceSAneesh Kumar K.V * @flags: flags to convert 511f88657ceSAneesh Kumar K.V */ 512f88657ceSAneesh Kumar K.V static int v9fs_at_to_dotl_flags(int flags) 513f88657ceSAneesh Kumar K.V { 514f88657ceSAneesh Kumar K.V int rflags = 0; 5156e195b0fSDominique Martinet 516f88657ceSAneesh Kumar K.V if (flags & AT_REMOVEDIR) 517f88657ceSAneesh Kumar K.V rflags |= P9_DOTL_AT_REMOVEDIR; 5186e195b0fSDominique Martinet 519f88657ceSAneesh Kumar K.V return rflags; 520f88657ceSAneesh Kumar K.V } 521f88657ceSAneesh Kumar K.V 522f88657ceSAneesh Kumar K.V /** 523ac89b2efSEryu Guan * v9fs_dec_count - helper functon to drop i_nlink. 524ac89b2efSEryu Guan * 525ac89b2efSEryu Guan * If a directory had nlink <= 2 (including . and ..), then we should not drop 526ac89b2efSEryu Guan * the link count, which indicates the underlying exported fs doesn't maintain 527ac89b2efSEryu Guan * nlink accurately. e.g. 528ac89b2efSEryu Guan * - overlayfs sets nlink to 1 for merged dir 529ac89b2efSEryu Guan * - ext4 (with dir_nlink feature enabled) sets nlink to 1 if a dir has more 530ac89b2efSEryu Guan * than EXT4_LINK_MAX (65000) links. 531ac89b2efSEryu Guan * 532ac89b2efSEryu Guan * @inode: inode whose nlink is being dropped 533ac89b2efSEryu Guan */ 534ac89b2efSEryu Guan static void v9fs_dec_count(struct inode *inode) 535ac89b2efSEryu Guan { 536ac89b2efSEryu Guan if (!S_ISDIR(inode->i_mode) || inode->i_nlink > 2) 537ac89b2efSEryu Guan drop_nlink(inode); 538ac89b2efSEryu Guan } 539ac89b2efSEryu Guan 540ac89b2efSEryu Guan /** 5412bad8471SEric Van Hensbergen * v9fs_remove - helper function to remove files and directories 54273c592b9SEric Van Hensbergen * @dir: directory inode that is being deleted 54348e370ffSAneesh Kumar K.V * @dentry: dentry that is being deleted 544fd2916bdSFabian Frederick * @flags: removing a directory 5452bad8471SEric Van Hensbergen * 5462bad8471SEric Van Hensbergen */ 5472bad8471SEric Van Hensbergen 54848e370ffSAneesh Kumar K.V static int v9fs_remove(struct inode *dir, struct dentry *dentry, int flags) 5492bad8471SEric Van Hensbergen { 55048e370ffSAneesh Kumar K.V struct inode *inode; 55148e370ffSAneesh Kumar K.V int retval = -EOPNOTSUPP; 55248e370ffSAneesh Kumar K.V struct p9_fid *v9fid, *dfid; 55348e370ffSAneesh Kumar K.V struct v9fs_session_info *v9ses; 5542bad8471SEric Van Hensbergen 5555d385153SJoe Perches p9_debug(P9_DEBUG_VFS, "inode: %p dentry: %p rmdir: %x\n", 55648e370ffSAneesh Kumar K.V dir, dentry, flags); 5572bad8471SEric Van Hensbergen 55848e370ffSAneesh Kumar K.V v9ses = v9fs_inode2v9ses(dir); 5592b0143b5SDavid Howells inode = d_inode(dentry); 56077d5a6b7SAl Viro dfid = v9fs_parent_fid(dentry); 56148e370ffSAneesh Kumar K.V if (IS_ERR(dfid)) { 56248e370ffSAneesh Kumar K.V retval = PTR_ERR(dfid); 5635d385153SJoe Perches p9_debug(P9_DEBUG_VFS, "fid lookup failed %d\n", retval); 56448e370ffSAneesh Kumar K.V return retval; 56548e370ffSAneesh Kumar K.V } 56648e370ffSAneesh Kumar K.V if (v9fs_proto_dotl(v9ses)) 567f88657ceSAneesh Kumar K.V retval = p9_client_unlinkat(dfid, dentry->d_name.name, 568f88657ceSAneesh Kumar K.V v9fs_at_to_dotl_flags(flags)); 569b48dbb99SDominique Martinet p9_fid_put(dfid); 57048e370ffSAneesh Kumar K.V if (retval == -EOPNOTSUPP) { 57148e370ffSAneesh Kumar K.V /* Try the one based on path */ 57248e370ffSAneesh Kumar K.V v9fid = v9fs_fid_clone(dentry); 573da977b2cSEric Van Hensbergen if (IS_ERR(v9fid)) 574da977b2cSEric Van Hensbergen return PTR_ERR(v9fid); 575d994f405SAneesh Kumar K.V retval = p9_client_remove(v9fid); 57648e370ffSAneesh Kumar K.V } 577b271ec47SAneesh Kumar K.V if (!retval) { 578b271ec47SAneesh Kumar K.V /* 579b271ec47SAneesh Kumar K.V * directories on unlink should have zero 580b271ec47SAneesh Kumar K.V * link count 581b271ec47SAneesh Kumar K.V */ 58248e370ffSAneesh Kumar K.V if (flags & AT_REMOVEDIR) { 58348e370ffSAneesh Kumar K.V clear_nlink(inode); 584ac89b2efSEryu Guan v9fs_dec_count(dir); 585b271ec47SAneesh Kumar K.V } else 586ac89b2efSEryu Guan v9fs_dec_count(inode); 587d28c61f0SAneesh Kumar K.V 58848e370ffSAneesh Kumar K.V v9fs_invalidate_inode_attr(inode); 589d28c61f0SAneesh Kumar K.V v9fs_invalidate_inode_attr(dir); 590154372e6SEric Van Hensbergen 591154372e6SEric Van Hensbergen /* invalidate all fids associated with dentry */ 592154372e6SEric Van Hensbergen /* NOTE: This will not include open fids */ 593154372e6SEric Van Hensbergen dentry->d_op->d_release(dentry); 594b271ec47SAneesh Kumar K.V } 595d994f405SAneesh Kumar K.V return retval; 5962bad8471SEric Van Hensbergen } 5972bad8471SEric Van Hensbergen 598bd238fb4SLatchesar Ionkov /** 599bd238fb4SLatchesar Ionkov * v9fs_create - Create a file 600ee443996SEric Van Hensbergen * @v9ses: session information 601ee443996SEric Van Hensbergen * @dir: directory that dentry is being created in 602bd238fb4SLatchesar Ionkov * @dentry: dentry that is being created 6030e15597eSAbhishek Kulkarni * @extension: 9p2000.u extension string to support devices, etc. 604bd238fb4SLatchesar Ionkov * @perm: create permissions 605bd238fb4SLatchesar Ionkov * @mode: open mode 606bd238fb4SLatchesar Ionkov * 607bd238fb4SLatchesar Ionkov */ 608bd238fb4SLatchesar Ionkov static struct p9_fid * 609bd238fb4SLatchesar Ionkov v9fs_create(struct v9fs_session_info *v9ses, struct inode *dir, 610bd238fb4SLatchesar Ionkov struct dentry *dentry, char *extension, u32 perm, u8 mode) 611bd238fb4SLatchesar Ionkov { 612bd238fb4SLatchesar Ionkov int err; 6137880b43bSAl Viro const unsigned char *name; 6146636b6dcSJianyong Wu struct p9_fid *dfid, *ofid = NULL, *fid = NULL; 615bd238fb4SLatchesar Ionkov struct inode *inode; 616bd238fb4SLatchesar Ionkov 6174b8e9923SAl Viro p9_debug(P9_DEBUG_VFS, "name %pd\n", dentry); 61851a87c55SEric Van Hensbergen 619bd238fb4SLatchesar Ionkov err = 0; 6207880b43bSAl Viro name = dentry->d_name.name; 62177d5a6b7SAl Viro dfid = v9fs_parent_fid(dentry); 622bd238fb4SLatchesar Ionkov if (IS_ERR(dfid)) { 623bd238fb4SLatchesar Ionkov err = PTR_ERR(dfid); 6245d385153SJoe Perches p9_debug(P9_DEBUG_VFS, "fid lookup failed %d\n", err); 6256d27e64dSVenkateswararao Jujjuri return ERR_PTR(err); 626bd238fb4SLatchesar Ionkov } 627bd238fb4SLatchesar Ionkov 628bd238fb4SLatchesar Ionkov /* clone a fid to use for creation */ 6297d50a29fSAl Viro ofid = clone_fid(dfid); 630bd238fb4SLatchesar Ionkov if (IS_ERR(ofid)) { 631bd238fb4SLatchesar Ionkov err = PTR_ERR(ofid); 6325d385153SJoe Perches p9_debug(P9_DEBUG_VFS, "p9_client_walk failed %d\n", err); 633dafbe689SDominique Martinet goto error; 634bd238fb4SLatchesar Ionkov } 635bd238fb4SLatchesar Ionkov 636bd238fb4SLatchesar Ionkov err = p9_client_fcreate(ofid, name, perm, mode, extension); 63751a87c55SEric Van Hensbergen if (err < 0) { 6385d385153SJoe Perches p9_debug(P9_DEBUG_VFS, "p9_client_fcreate failed %d\n", err); 639bd238fb4SLatchesar Ionkov goto error; 64051a87c55SEric Van Hensbergen } 641bd238fb4SLatchesar Ionkov 642b6054793SAneesh Kumar K.V if (!(perm & P9_DMLINK)) { 643bd238fb4SLatchesar Ionkov /* now walk from the parent so we can get unopened fid */ 6446d27e64dSVenkateswararao Jujjuri fid = p9_client_walk(dfid, 1, &name, 1); 645bd238fb4SLatchesar Ionkov if (IS_ERR(fid)) { 646bd238fb4SLatchesar Ionkov err = PTR_ERR(fid); 647b6054793SAneesh Kumar K.V p9_debug(P9_DEBUG_VFS, 648b6054793SAneesh Kumar K.V "p9_client_walk failed %d\n", err); 649bd238fb4SLatchesar Ionkov goto error; 6506d27e64dSVenkateswararao Jujjuri } 651b6054793SAneesh Kumar K.V /* 652b6054793SAneesh Kumar K.V * instantiate inode and assign the unopened fid to the dentry 653b6054793SAneesh Kumar K.V */ 654ed80fcfaSAneesh Kumar K.V inode = v9fs_get_new_inode_from_fid(v9ses, fid, dir->i_sb); 655bd238fb4SLatchesar Ionkov if (IS_ERR(inode)) { 656bd238fb4SLatchesar Ionkov err = PTR_ERR(inode); 657b6054793SAneesh Kumar K.V p9_debug(P9_DEBUG_VFS, 658b6054793SAneesh Kumar K.V "inode creation failed %d\n", err); 659bd238fb4SLatchesar Ionkov goto error; 660bd238fb4SLatchesar Ionkov } 661dafbe689SDominique Martinet v9fs_fid_add(dentry, &fid); 6625441ae5eSAneesh Kumar K.V d_instantiate(dentry, inode); 663b6054793SAneesh Kumar K.V } 664b48dbb99SDominique Martinet p9_fid_put(dfid); 665bd238fb4SLatchesar Ionkov return ofid; 666bd238fb4SLatchesar Ionkov error: 667dafbe689SDominique Martinet p9_fid_put(dfid); 668b48dbb99SDominique Martinet p9_fid_put(ofid); 669b48dbb99SDominique Martinet p9_fid_put(fid); 670bd238fb4SLatchesar Ionkov return ERR_PTR(err); 671bd238fb4SLatchesar Ionkov } 672bd238fb4SLatchesar Ionkov 6732bad8471SEric Van Hensbergen /** 674e43ae79cSMiklos Szeredi * v9fs_vfs_create - VFS hook to create a regular file 6756c960e68SChristian Brauner * @idmap: idmap of the mount 676bc868036SDavid Howells * @dir: The parent directory 677bc868036SDavid Howells * @dentry: The name of file to be created 678bc868036SDavid Howells * @mode: The UNIX file mode to set 679bc868036SDavid Howells * @excl: True if the file must not yet exist 680e43ae79cSMiklos Szeredi * 681e43ae79cSMiklos Szeredi * open(.., O_CREAT) is handled in v9fs_vfs_atomic_open(). This is only called 682e43ae79cSMiklos Szeredi * for mknod(2). 683e43ae79cSMiklos Szeredi * 6842bad8471SEric Van Hensbergen */ 6852bad8471SEric Van Hensbergen 6862bad8471SEric Van Hensbergen static int 6876c960e68SChristian Brauner v9fs_vfs_create(struct mnt_idmap *idmap, struct inode *dir, 688549c7297SChristian Brauner struct dentry *dentry, umode_t mode, bool excl) 6892bad8471SEric Van Hensbergen { 690e43ae79cSMiklos Szeredi struct v9fs_session_info *v9ses = v9fs_inode2v9ses(dir); 691e43ae79cSMiklos Szeredi u32 perm = unixmode2p9mode(v9ses, mode); 692e43ae79cSMiklos Szeredi struct p9_fid *fid; 6936a3124a3SLatchesar Ionkov 694e43ae79cSMiklos Szeredi /* P9_OEXCL? */ 695e43ae79cSMiklos Szeredi fid = v9fs_create(v9ses, dir, dentry, NULL, perm, P9_ORDWR); 696e43ae79cSMiklos Szeredi if (IS_ERR(fid)) 697e43ae79cSMiklos Szeredi return PTR_ERR(fid); 6986a3124a3SLatchesar Ionkov 699d28c61f0SAneesh Kumar K.V v9fs_invalidate_inode_attr(dir); 700b48dbb99SDominique Martinet p9_fid_put(fid); 7016a3124a3SLatchesar Ionkov 7026a3124a3SLatchesar Ionkov return 0; 7032bad8471SEric Van Hensbergen } 7042bad8471SEric Van Hensbergen 7052bad8471SEric Van Hensbergen /** 7062bad8471SEric Van Hensbergen * v9fs_vfs_mkdir - VFS mkdir hook to create a directory 707c54bd91eSChristian Brauner * @idmap: idmap of the mount 708ee443996SEric Van Hensbergen * @dir: inode that is being unlinked 7092bad8471SEric Van Hensbergen * @dentry: dentry that is being unlinked 7102bad8471SEric Van Hensbergen * @mode: mode for new directory 7112bad8471SEric Van Hensbergen * 7122bad8471SEric Van Hensbergen */ 7132bad8471SEric Van Hensbergen 714c54bd91eSChristian Brauner static int v9fs_vfs_mkdir(struct mnt_idmap *idmap, struct inode *dir, 715549c7297SChristian Brauner struct dentry *dentry, umode_t mode) 7162bad8471SEric Van Hensbergen { 7176a3124a3SLatchesar Ionkov int err; 718bd238fb4SLatchesar Ionkov u32 perm; 719bd238fb4SLatchesar Ionkov struct p9_fid *fid; 720d28c61f0SAneesh Kumar K.V struct v9fs_session_info *v9ses; 7216a3124a3SLatchesar Ionkov 7224b8e9923SAl Viro p9_debug(P9_DEBUG_VFS, "name %pd\n", dentry); 723bd238fb4SLatchesar Ionkov err = 0; 7246a3124a3SLatchesar Ionkov v9ses = v9fs_inode2v9ses(dir); 7256a3124a3SLatchesar Ionkov perm = unixmode2p9mode(v9ses, mode | S_IFDIR); 726bd238fb4SLatchesar Ionkov fid = v9fs_create(v9ses, dir, dentry, NULL, perm, P9_OREAD); 727bd238fb4SLatchesar Ionkov if (IS_ERR(fid)) { 728bd238fb4SLatchesar Ionkov err = PTR_ERR(fid); 729bd238fb4SLatchesar Ionkov fid = NULL; 730d28c61f0SAneesh Kumar K.V } else { 731b271ec47SAneesh Kumar K.V inc_nlink(dir); 732d28c61f0SAneesh Kumar K.V v9fs_invalidate_inode_attr(dir); 733d28c61f0SAneesh Kumar K.V } 7346a3124a3SLatchesar Ionkov 735bd238fb4SLatchesar Ionkov if (fid) 736b48dbb99SDominique Martinet p9_fid_put(fid); 7376a3124a3SLatchesar Ionkov 7386a3124a3SLatchesar Ionkov return err; 7392bad8471SEric Van Hensbergen } 7402bad8471SEric Van Hensbergen 7412bad8471SEric Van Hensbergen /** 7422bad8471SEric Van Hensbergen * v9fs_vfs_lookup - VFS lookup hook to "walk" to a new inode 7432bad8471SEric Van Hensbergen * @dir: inode that is being walked from 7442bad8471SEric Van Hensbergen * @dentry: dentry that is being walked to? 745fd2916bdSFabian Frederick * @flags: lookup flags (unused) 7462bad8471SEric Van Hensbergen * 7472bad8471SEric Van Hensbergen */ 7482bad8471SEric Van Hensbergen 74953c06f4eSAneesh Kumar K.V struct dentry *v9fs_vfs_lookup(struct inode *dir, struct dentry *dentry, 75000cd8dd3SAl Viro unsigned int flags) 7512bad8471SEric Van Hensbergen { 75273f50717SAneesh Kumar K.V struct dentry *res; 7532bad8471SEric Van Hensbergen struct v9fs_session_info *v9ses; 754bd238fb4SLatchesar Ionkov struct p9_fid *dfid, *fid; 7552bad8471SEric Van Hensbergen struct inode *inode; 7567880b43bSAl Viro const unsigned char *name; 7572bad8471SEric Van Hensbergen 7584b8e9923SAl Viro p9_debug(P9_DEBUG_VFS, "dir: %p dentry: (%pd) %p flags: %x\n", 7594b8e9923SAl Viro dir, dentry, dentry, flags); 7602bad8471SEric Van Hensbergen 76111e9b49bSSripathi Kodi if (dentry->d_name.len > NAME_MAX) 76211e9b49bSSripathi Kodi return ERR_PTR(-ENAMETOOLONG); 76311e9b49bSSripathi Kodi 7642bad8471SEric Van Hensbergen v9ses = v9fs_inode2v9ses(dir); 765a534c8d1SAneesh Kumar K.V /* We can walk d_parent because we hold the dir->i_mutex */ 76677d5a6b7SAl Viro dfid = v9fs_parent_fid(dentry); 767bd238fb4SLatchesar Ionkov if (IS_ERR(dfid)) 768e231c2eeSDavid Howells return ERR_CAST(dfid); 7692bad8471SEric Van Hensbergen 77073f50717SAneesh Kumar K.V /* 77173f50717SAneesh Kumar K.V * Make sure we don't use a wrong inode due to parallel 77273f50717SAneesh Kumar K.V * unlink. For cached mode create calls request for new 77373f50717SAneesh Kumar K.V * inode. But with cache disabled, lookup should do this. 77473f50717SAneesh Kumar K.V */ 775500e2ab6SAl Viro name = dentry->d_name.name; 776500e2ab6SAl Viro fid = p9_client_walk(dfid, 1, &name, 1); 777b48dbb99SDominique Martinet p9_fid_put(dfid); 778500e2ab6SAl Viro if (fid == ERR_PTR(-ENOENT)) 779500e2ab6SAl Viro inode = NULL; 780500e2ab6SAl Viro else if (IS_ERR(fid)) 781500e2ab6SAl Viro inode = ERR_CAST(fid); 782500e2ab6SAl Viro else if (v9ses->cache == CACHE_LOOSE || v9ses->cache == CACHE_FSCACHE) 783a78ce05dSAneesh Kumar K.V inode = v9fs_get_inode_from_fid(v9ses, fid, dir->i_sb); 78473f50717SAneesh Kumar K.V else 78573f50717SAneesh Kumar K.V inode = v9fs_get_new_inode_from_fid(v9ses, fid, dir->i_sb); 78673f50717SAneesh Kumar K.V /* 78773f50717SAneesh Kumar K.V * If we had a rename on the server and a parallel lookup 78873f50717SAneesh Kumar K.V * for the new name, then make sure we instantiate with 78973f50717SAneesh Kumar K.V * the new name. ie look up for a/b, while on server somebody 79073f50717SAneesh Kumar K.V * moved b under k and client parallely did a lookup for 79173f50717SAneesh Kumar K.V * k/b. 79273f50717SAneesh Kumar K.V */ 79341d28bcaSAl Viro res = d_splice_alias(inode, dentry); 794500e2ab6SAl Viro if (!IS_ERR(fid)) { 795a3b2157eSAl Viro if (!res) 796dafbe689SDominique Martinet v9fs_fid_add(dentry, &fid); 797a3b2157eSAl Viro else if (!IS_ERR(res)) 798dafbe689SDominique Martinet v9fs_fid_add(res, &fid); 799a3b2157eSAl Viro else 800b48dbb99SDominique Martinet p9_fid_put(fid); 801500e2ab6SAl Viro } 8027b5be621SAl Viro return res; 8032bad8471SEric Van Hensbergen } 8042bad8471SEric Van Hensbergen 805d9585277SAl Viro static int 806e43ae79cSMiklos Szeredi v9fs_vfs_atomic_open(struct inode *dir, struct dentry *dentry, 8076e195b0fSDominique Martinet struct file *file, unsigned int flags, umode_t mode) 808e43ae79cSMiklos Szeredi { 809e43ae79cSMiklos Szeredi int err; 810e43ae79cSMiklos Szeredi u32 perm; 811e43ae79cSMiklos Szeredi struct v9fs_inode *v9inode; 812e43ae79cSMiklos Szeredi struct v9fs_session_info *v9ses; 813e43ae79cSMiklos Szeredi struct p9_fid *fid, *inode_fid; 814e43ae79cSMiklos Szeredi struct dentry *res = NULL; 815987a6485SGreg Kurz struct inode *inode; 816e43ae79cSMiklos Szeredi 81700699ad8SAl Viro if (d_in_lookup(dentry)) { 81800cd8dd3SAl Viro res = v9fs_vfs_lookup(dir, dentry, 0); 819e43ae79cSMiklos Szeredi if (IS_ERR(res)) 820d9585277SAl Viro return PTR_ERR(res); 821e43ae79cSMiklos Szeredi 822e43ae79cSMiklos Szeredi if (res) 823e43ae79cSMiklos Szeredi dentry = res; 824e43ae79cSMiklos Szeredi } 825e43ae79cSMiklos Szeredi 826e43ae79cSMiklos Szeredi /* Only creates */ 8272b0143b5SDavid Howells if (!(flags & O_CREAT) || d_really_is_positive(dentry)) 828e45198a6SAl Viro return finish_no_open(file, res); 829e43ae79cSMiklos Szeredi 830e43ae79cSMiklos Szeredi err = 0; 831fae74696SGeyslan G. Bem 832e43ae79cSMiklos Szeredi v9ses = v9fs_inode2v9ses(dir); 833e43ae79cSMiklos Szeredi perm = unixmode2p9mode(v9ses, mode); 834e43ae79cSMiklos Szeredi fid = v9fs_create(v9ses, dir, dentry, NULL, perm, 835e43ae79cSMiklos Szeredi v9fs_uflags2omode(flags, 836e43ae79cSMiklos Szeredi v9fs_proto_dotu(v9ses))); 837e43ae79cSMiklos Szeredi if (IS_ERR(fid)) { 838e43ae79cSMiklos Szeredi err = PTR_ERR(fid); 839e43ae79cSMiklos Szeredi goto error; 840e43ae79cSMiklos Szeredi } 841e43ae79cSMiklos Szeredi 842e43ae79cSMiklos Szeredi v9fs_invalidate_inode_attr(dir); 843987a6485SGreg Kurz inode = d_inode(dentry); 844987a6485SGreg Kurz v9inode = V9FS_I(inode); 845e43ae79cSMiklos Szeredi mutex_lock(&v9inode->v_mutex); 846fb89b45cSDominique Martinet if ((v9ses->cache == CACHE_LOOSE || v9ses->cache == CACHE_FSCACHE) && 847fb89b45cSDominique Martinet !v9inode->writeback_fid && 848e43ae79cSMiklos Szeredi ((flags & O_ACCMODE) != O_RDONLY)) { 849e43ae79cSMiklos Szeredi /* 850e43ae79cSMiklos Szeredi * clone a fid and add it to writeback_fid 851e43ae79cSMiklos Szeredi * we do it during open time instead of 852e43ae79cSMiklos Szeredi * page dirty time via write_begin/page_mkwrite 853e43ae79cSMiklos Szeredi * because we want write after unlink usecase 854e43ae79cSMiklos Szeredi * to work. 855e43ae79cSMiklos Szeredi */ 856e43ae79cSMiklos Szeredi inode_fid = v9fs_writeback_fid(dentry); 857e43ae79cSMiklos Szeredi if (IS_ERR(inode_fid)) { 858e43ae79cSMiklos Szeredi err = PTR_ERR(inode_fid); 859e43ae79cSMiklos Szeredi mutex_unlock(&v9inode->v_mutex); 860e43ae79cSMiklos Szeredi goto error; 861e43ae79cSMiklos Szeredi } 862e43ae79cSMiklos Szeredi v9inode->writeback_fid = (void *) inode_fid; 863e43ae79cSMiklos Szeredi } 864e43ae79cSMiklos Szeredi mutex_unlock(&v9inode->v_mutex); 865be12af3eSAl Viro err = finish_open(file, dentry, generic_file_open); 86630d90494SAl Viro if (err) 867e43ae79cSMiklos Szeredi goto error; 868e43ae79cSMiklos Szeredi 86930d90494SAl Viro file->private_data = fid; 870fb89b45cSDominique Martinet if (v9ses->cache == CACHE_LOOSE || v9ses->cache == CACHE_FSCACHE) 87124e42e32SDavid Howells fscache_use_cookie(v9fs_inode_cookie(v9inode), 87224e42e32SDavid Howells file->f_mode & FMODE_WRITE); 873dafbe689SDominique Martinet v9fs_open_fid_add(inode, &fid); 874e43ae79cSMiklos Szeredi 87573a09dd9SAl Viro file->f_mode |= FMODE_CREATED; 876e43ae79cSMiklos Szeredi out: 877e43ae79cSMiklos Szeredi dput(res); 878d9585277SAl Viro return err; 879e43ae79cSMiklos Szeredi 880e43ae79cSMiklos Szeredi error: 881b48dbb99SDominique Martinet p9_fid_put(fid); 882e43ae79cSMiklos Szeredi goto out; 883e43ae79cSMiklos Szeredi } 884e43ae79cSMiklos Szeredi 8852bad8471SEric Van Hensbergen /** 8862bad8471SEric Van Hensbergen * v9fs_vfs_unlink - VFS unlink hook to delete an inode 8872bad8471SEric Van Hensbergen * @i: inode that is being unlinked 88873c592b9SEric Van Hensbergen * @d: dentry that is being unlinked 8892bad8471SEric Van Hensbergen * 8902bad8471SEric Van Hensbergen */ 8912bad8471SEric Van Hensbergen 89253c06f4eSAneesh Kumar K.V int v9fs_vfs_unlink(struct inode *i, struct dentry *d) 8932bad8471SEric Van Hensbergen { 8942bad8471SEric Van Hensbergen return v9fs_remove(i, d, 0); 8952bad8471SEric Van Hensbergen } 8962bad8471SEric Van Hensbergen 8972bad8471SEric Van Hensbergen /** 8982bad8471SEric Van Hensbergen * v9fs_vfs_rmdir - VFS unlink hook to delete a directory 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_rmdir(struct inode *i, struct dentry *d) 9052bad8471SEric Van Hensbergen { 90648e370ffSAneesh Kumar K.V return v9fs_remove(i, d, AT_REMOVEDIR); 9072bad8471SEric Van Hensbergen } 9082bad8471SEric Van Hensbergen 9092bad8471SEric Van Hensbergen /** 9102bad8471SEric Van Hensbergen * v9fs_vfs_rename - VFS hook to rename an inode 911bc868036SDavid Howells * @mnt_userns: The user namespace of the mount 9122bad8471SEric Van Hensbergen * @old_dir: old dir inode 9132bad8471SEric Van Hensbergen * @old_dentry: old dentry 9142bad8471SEric Van Hensbergen * @new_dir: new dir inode 9152bad8471SEric Van Hensbergen * @new_dentry: new dentry 916bc868036SDavid Howells * @flags: RENAME_* flags 9172bad8471SEric Van Hensbergen * 9182bad8471SEric Van Hensbergen */ 9192bad8471SEric Van Hensbergen 92053c06f4eSAneesh Kumar K.V int 921549c7297SChristian Brauner v9fs_vfs_rename(struct user_namespace *mnt_userns, struct inode *old_dir, 922549c7297SChristian Brauner struct dentry *old_dentry, struct inode *new_dir, 923549c7297SChristian Brauner struct dentry *new_dentry, unsigned int flags) 9242bad8471SEric Van Hensbergen { 925d28c61f0SAneesh Kumar K.V int retval; 926bd238fb4SLatchesar Ionkov struct inode *old_inode; 927b271ec47SAneesh Kumar K.V struct inode *new_inode; 928bd238fb4SLatchesar Ionkov struct v9fs_session_info *v9ses; 929dafbe689SDominique Martinet struct p9_fid *oldfid = NULL, *dfid = NULL; 930dafbe689SDominique Martinet struct p9_fid *olddirfid = NULL; 931dafbe689SDominique Martinet struct p9_fid *newdirfid = NULL; 932bd238fb4SLatchesar Ionkov struct p9_wstat wstat; 9332bad8471SEric Van Hensbergen 9341cd66c93SMiklos Szeredi if (flags) 9351cd66c93SMiklos Szeredi return -EINVAL; 9361cd66c93SMiklos Szeredi 9375d385153SJoe Perches p9_debug(P9_DEBUG_VFS, "\n"); 938bd238fb4SLatchesar Ionkov retval = 0; 9392b0143b5SDavid Howells old_inode = d_inode(old_dentry); 9402b0143b5SDavid Howells new_inode = d_inode(new_dentry); 941bd238fb4SLatchesar Ionkov v9ses = v9fs_inode2v9ses(old_inode); 942bd238fb4SLatchesar Ionkov oldfid = v9fs_fid_lookup(old_dentry); 943da977b2cSEric Van Hensbergen if (IS_ERR(oldfid)) 944da977b2cSEric Van Hensbergen return PTR_ERR(oldfid); 945da977b2cSEric Van Hensbergen 9466636b6dcSJianyong Wu dfid = v9fs_parent_fid(old_dentry); 9476636b6dcSJianyong Wu olddirfid = clone_fid(dfid); 948b48dbb99SDominique Martinet p9_fid_put(dfid); 949dafbe689SDominique Martinet dfid = NULL; 9506636b6dcSJianyong Wu 951da977b2cSEric Van Hensbergen if (IS_ERR(olddirfid)) { 952da977b2cSEric Van Hensbergen retval = PTR_ERR(olddirfid); 953dafbe689SDominique Martinet goto error; 954da977b2cSEric Van Hensbergen } 955da977b2cSEric Van Hensbergen 9566636b6dcSJianyong Wu dfid = v9fs_parent_fid(new_dentry); 9576636b6dcSJianyong Wu newdirfid = clone_fid(dfid); 958b48dbb99SDominique Martinet p9_fid_put(dfid); 959dafbe689SDominique Martinet dfid = NULL; 9606636b6dcSJianyong Wu 961da977b2cSEric Van Hensbergen if (IS_ERR(newdirfid)) { 962da977b2cSEric Van Hensbergen retval = PTR_ERR(newdirfid); 963dafbe689SDominique Martinet goto error; 9642bad8471SEric Van Hensbergen } 9652bad8471SEric Van Hensbergen 966a534c8d1SAneesh Kumar K.V down_write(&v9ses->rename_sem); 9674681dbdaSSripathi Kodi if (v9fs_proto_dotl(v9ses)) { 9689e8fb38eSAneesh Kumar K.V retval = p9_client_renameat(olddirfid, old_dentry->d_name.name, 9699e8fb38eSAneesh Kumar K.V newdirfid, new_dentry->d_name.name); 9709e8fb38eSAneesh Kumar K.V if (retval == -EOPNOTSUPP) 9714681dbdaSSripathi Kodi retval = p9_client_rename(oldfid, newdirfid, 9729e8fb38eSAneesh Kumar K.V new_dentry->d_name.name); 9739e8fb38eSAneesh Kumar K.V if (retval != -EOPNOTSUPP) 974dafbe689SDominique Martinet goto error_locked; 9754681dbdaSSripathi Kodi } 976a534c8d1SAneesh Kumar K.V if (old_dentry->d_parent != new_dentry->d_parent) { 977a534c8d1SAneesh Kumar K.V /* 978a534c8d1SAneesh Kumar K.V * 9P .u can only handle file rename in the same directory 979a534c8d1SAneesh Kumar K.V */ 9804681dbdaSSripathi Kodi 9815d385153SJoe Perches p9_debug(P9_DEBUG_ERROR, "old dir and new dir are different\n"); 982621997cdSEric Van Hensbergen retval = -EXDEV; 983dafbe689SDominique Martinet goto error_locked; 9842bad8471SEric Van Hensbergen } 985531b1094SLatchesar Ionkov v9fs_blank_wstat(&wstat); 986ba17674fSLatchesar Ionkov wstat.muid = v9ses->uname; 9877880b43bSAl Viro wstat.name = new_dentry->d_name.name; 988bd238fb4SLatchesar Ionkov retval = p9_client_wstat(oldfid, &wstat); 9892bad8471SEric Van Hensbergen 990dafbe689SDominique Martinet error_locked: 991b271ec47SAneesh Kumar K.V if (!retval) { 992b271ec47SAneesh Kumar K.V if (new_inode) { 993b271ec47SAneesh Kumar K.V if (S_ISDIR(new_inode->i_mode)) 994b271ec47SAneesh Kumar K.V clear_nlink(new_inode); 995b271ec47SAneesh Kumar K.V else 996ac89b2efSEryu Guan v9fs_dec_count(new_inode); 997b271ec47SAneesh Kumar K.V } 998b271ec47SAneesh Kumar K.V if (S_ISDIR(old_inode->i_mode)) { 999b271ec47SAneesh Kumar K.V if (!new_inode) 1000b271ec47SAneesh Kumar K.V inc_nlink(new_dir); 1001ac89b2efSEryu Guan v9fs_dec_count(old_dir); 1002b271ec47SAneesh Kumar K.V } 10033bc86de3SAneesh Kumar K.V v9fs_invalidate_inode_attr(old_inode); 1004d28c61f0SAneesh Kumar K.V v9fs_invalidate_inode_attr(old_dir); 1005d28c61f0SAneesh Kumar K.V v9fs_invalidate_inode_attr(new_dir); 10063bc86de3SAneesh Kumar K.V 1007a534c8d1SAneesh Kumar K.V /* successful rename */ 1008a534c8d1SAneesh Kumar K.V d_move(old_dentry, new_dentry); 1009b271ec47SAneesh Kumar K.V } 1010a534c8d1SAneesh Kumar K.V up_write(&v9ses->rename_sem); 1011dafbe689SDominique Martinet 1012dafbe689SDominique Martinet error: 1013b48dbb99SDominique Martinet p9_fid_put(newdirfid); 1014b48dbb99SDominique Martinet p9_fid_put(olddirfid); 1015b48dbb99SDominique Martinet p9_fid_put(oldfid); 10162bad8471SEric Van Hensbergen return retval; 10172bad8471SEric Van Hensbergen } 10182bad8471SEric Van Hensbergen 10192bad8471SEric Van Hensbergen /** 1020943ffb58SAdrian Bunk * v9fs_vfs_getattr - retrieve file metadata 1021b74d24f7SChristian Brauner * @idmap: idmap of the mount 1022a528d35eSDavid Howells * @path: Object to query 1023ee443996SEric Van Hensbergen * @stat: metadata structure to populate 1024a528d35eSDavid Howells * @request_mask: Mask of STATX_xxx flags indicating the caller's interests 1025a528d35eSDavid Howells * @flags: AT_STATX_xxx setting 10262bad8471SEric Van Hensbergen * 10272bad8471SEric Van Hensbergen */ 10282bad8471SEric Van Hensbergen 10292bad8471SEric Van Hensbergen static int 1030b74d24f7SChristian Brauner v9fs_vfs_getattr(struct mnt_idmap *idmap, const struct path *path, 1031549c7297SChristian Brauner struct kstat *stat, u32 request_mask, unsigned int flags) 10322bad8471SEric Van Hensbergen { 1033a528d35eSDavid Howells struct dentry *dentry = path->dentry; 1034bd238fb4SLatchesar Ionkov struct v9fs_session_info *v9ses; 1035bd238fb4SLatchesar Ionkov struct p9_fid *fid; 103651a87c55SEric Van Hensbergen struct p9_wstat *st; 10372bad8471SEric Van Hensbergen 10385d385153SJoe Perches p9_debug(P9_DEBUG_VFS, "dentry: %p\n", dentry); 103942869c8aSAneesh Kumar K.V v9ses = v9fs_dentry2v9ses(dentry); 1040a1211908SAneesh Kumar K.V if (v9ses->cache == CACHE_LOOSE || v9ses->cache == CACHE_FSCACHE) { 1041b74d24f7SChristian Brauner generic_fillattr(&nop_mnt_idmap, d_inode(dentry), stat); 1042a1211908SAneesh Kumar K.V return 0; 1043a1211908SAneesh Kumar K.V } 1044bd238fb4SLatchesar Ionkov fid = v9fs_fid_lookup(dentry); 1045da977b2cSEric Van Hensbergen if (IS_ERR(fid)) 1046da977b2cSEric Van Hensbergen return PTR_ERR(fid); 10472bad8471SEric Van Hensbergen 1048bd238fb4SLatchesar Ionkov st = p9_client_stat(fid); 1049b48dbb99SDominique Martinet p9_fid_put(fid); 1050bd238fb4SLatchesar Ionkov if (IS_ERR(st)) 1051bd238fb4SLatchesar Ionkov return PTR_ERR(st); 10522bad8471SEric Van Hensbergen 10535e3cc1eeSHou Tao v9fs_stat2inode(st, d_inode(dentry), dentry->d_sb, 0); 1054b74d24f7SChristian Brauner generic_fillattr(&nop_mnt_idmap, d_inode(dentry), stat); 10552bad8471SEric Van Hensbergen 105662b2be59SLatchesar Ionkov p9stat_free(st); 1057bd238fb4SLatchesar Ionkov kfree(st); 1058bd238fb4SLatchesar Ionkov return 0; 10592bad8471SEric Van Hensbergen } 10602bad8471SEric Van Hensbergen 10612bad8471SEric Van Hensbergen /** 10622bad8471SEric Van Hensbergen * v9fs_vfs_setattr - set file metadata 1063c1632a0fSChristian Brauner * @idmap: idmap of the mount 10642bad8471SEric Van Hensbergen * @dentry: file whose metadata to set 10652bad8471SEric Van Hensbergen * @iattr: metadata assignment structure 10662bad8471SEric Van Hensbergen * 10672bad8471SEric Van Hensbergen */ 10682bad8471SEric Van Hensbergen 1069c1632a0fSChristian Brauner static int v9fs_vfs_setattr(struct mnt_idmap *idmap, 1070549c7297SChristian Brauner struct dentry *dentry, struct iattr *iattr) 10712bad8471SEric Van Hensbergen { 10726636b6dcSJianyong Wu int retval, use_dentry = 0; 107324e42e32SDavid Howells struct inode *inode = d_inode(dentry); 107424e42e32SDavid Howells struct v9fs_inode *v9inode = V9FS_I(inode); 1075bd238fb4SLatchesar Ionkov struct v9fs_session_info *v9ses; 107666246641SJianyong Wu struct p9_fid *fid = NULL; 1077bd238fb4SLatchesar Ionkov struct p9_wstat wstat; 10782bad8471SEric Van Hensbergen 10795d385153SJoe Perches p9_debug(P9_DEBUG_VFS, "\n"); 1080c1632a0fSChristian Brauner retval = setattr_prepare(&nop_mnt_idmap, dentry, iattr); 1081059c138bSAneesh Kumar K.V if (retval) 1082059c138bSAneesh Kumar K.V return retval; 1083059c138bSAneesh Kumar K.V 1084bd238fb4SLatchesar Ionkov retval = -EPERM; 108542869c8aSAneesh Kumar K.V v9ses = v9fs_dentry2v9ses(dentry); 108666246641SJianyong Wu if (iattr->ia_valid & ATTR_FILE) { 108766246641SJianyong Wu fid = iattr->ia_file->private_data; 108866246641SJianyong Wu WARN_ON(!fid); 108966246641SJianyong Wu } 10906636b6dcSJianyong Wu if (!fid) { 1091bd238fb4SLatchesar Ionkov fid = v9fs_fid_lookup(dentry); 10926636b6dcSJianyong Wu use_dentry = 1; 10936636b6dcSJianyong Wu } 1094da977b2cSEric Van Hensbergen if (IS_ERR(fid)) 1095da977b2cSEric Van Hensbergen return PTR_ERR(fid); 10962bad8471SEric Van Hensbergen 1097531b1094SLatchesar Ionkov v9fs_blank_wstat(&wstat); 10982bad8471SEric Van Hensbergen if (iattr->ia_valid & ATTR_MODE) 1099531b1094SLatchesar Ionkov wstat.mode = unixmode2p9mode(v9ses, iattr->ia_mode); 11002bad8471SEric Van Hensbergen 11012bad8471SEric Van Hensbergen if (iattr->ia_valid & ATTR_MTIME) 1102531b1094SLatchesar Ionkov wstat.mtime = iattr->ia_mtime.tv_sec; 11032bad8471SEric Van Hensbergen 11042bad8471SEric Van Hensbergen if (iattr->ia_valid & ATTR_ATIME) 1105531b1094SLatchesar Ionkov wstat.atime = iattr->ia_atime.tv_sec; 11062bad8471SEric Van Hensbergen 11072bad8471SEric Van Hensbergen if (iattr->ia_valid & ATTR_SIZE) 1108531b1094SLatchesar Ionkov wstat.length = iattr->ia_size; 11092bad8471SEric Van Hensbergen 1110dd6102fbSSripathi Kodi if (v9fs_proto_dotu(v9ses)) { 1111531b1094SLatchesar Ionkov if (iattr->ia_valid & ATTR_UID) 1112531b1094SLatchesar Ionkov wstat.n_uid = iattr->ia_uid; 11132bad8471SEric Van Hensbergen 1114531b1094SLatchesar Ionkov if (iattr->ia_valid & ATTR_GID) 1115531b1094SLatchesar Ionkov wstat.n_gid = iattr->ia_gid; 11162bad8471SEric Van Hensbergen } 1117059c138bSAneesh Kumar K.V 11183dc5436aSAneesh Kumar K.V /* Write all dirty data */ 1119e36cb0b8SDavid Howells if (d_is_reg(dentry)) 112024e42e32SDavid Howells filemap_write_and_wait(inode->i_mapping); 11213dc5436aSAneesh Kumar K.V 1122f10fc50fSAneesh Kumar K.V retval = p9_client_wstat(fid, &wstat); 11236636b6dcSJianyong Wu 11246636b6dcSJianyong Wu if (use_dentry) 1125b48dbb99SDominique Martinet p9_fid_put(fid); 11266636b6dcSJianyong Wu 1127f10fc50fSAneesh Kumar K.V if (retval < 0) 1128f10fc50fSAneesh Kumar K.V return retval; 1129059c138bSAneesh Kumar K.V 1130059c138bSAneesh Kumar K.V if ((iattr->ia_valid & ATTR_SIZE) && 113124e42e32SDavid Howells iattr->ia_size != i_size_read(inode)) { 113224e42e32SDavid Howells truncate_setsize(inode, iattr->ia_size); 113324e42e32SDavid Howells fscache_resize_cookie(v9fs_inode_cookie(v9inode), iattr->ia_size); 113424e42e32SDavid Howells } 1135059c138bSAneesh Kumar K.V 113624e42e32SDavid Howells v9fs_invalidate_inode_attr(inode); 11371025774cSChristoph Hellwig 1138c1632a0fSChristian Brauner setattr_copy(&nop_mnt_idmap, inode, iattr); 113924e42e32SDavid Howells mark_inode_dirty(inode); 11401025774cSChristoph Hellwig return 0; 11412bad8471SEric Van Hensbergen } 11422bad8471SEric Van Hensbergen 11432bad8471SEric Van Hensbergen /** 1144531b1094SLatchesar Ionkov * v9fs_stat2inode - populate an inode structure with mistat info 1145531b1094SLatchesar Ionkov * @stat: Plan 9 metadata (mistat) structure 11462bad8471SEric Van Hensbergen * @inode: inode to populate 11472bad8471SEric Van Hensbergen * @sb: superblock of filesystem 11485e3cc1eeSHou Tao * @flags: control flags (e.g. V9FS_STAT2INODE_KEEP_ISIZE) 11492bad8471SEric Van Hensbergen * 11502bad8471SEric Van Hensbergen */ 11512bad8471SEric Van Hensbergen 11522bad8471SEric Van Hensbergen void 115351a87c55SEric Van Hensbergen v9fs_stat2inode(struct p9_wstat *stat, struct inode *inode, 11545e3cc1eeSHou Tao struct super_block *sb, unsigned int flags) 11552bad8471SEric Van Hensbergen { 11563eda0de6SAl Viro umode_t mode; 11572bad8471SEric Van Hensbergen struct v9fs_session_info *v9ses = sb->s_fs_info; 1158b3cbea03SAneesh Kumar K.V struct v9fs_inode *v9inode = V9FS_I(inode); 11592bad8471SEric Van Hensbergen 1160bfe86848SMiklos Szeredi set_nlink(inode, 1); 11612bad8471SEric Van Hensbergen 1162531b1094SLatchesar Ionkov inode->i_atime.tv_sec = stat->atime; 1163531b1094SLatchesar Ionkov inode->i_mtime.tv_sec = stat->mtime; 1164531b1094SLatchesar Ionkov inode->i_ctime.tv_sec = stat->mtime; 11652bad8471SEric Van Hensbergen 1166bd32b82dSLatchesar Ionkov inode->i_uid = v9ses->dfltuid; 1167bd32b82dSLatchesar Ionkov inode->i_gid = v9ses->dfltgid; 11682bad8471SEric Van Hensbergen 1169dd6102fbSSripathi Kodi if (v9fs_proto_dotu(v9ses)) { 1170531b1094SLatchesar Ionkov inode->i_uid = stat->n_uid; 1171531b1094SLatchesar Ionkov inode->i_gid = stat->n_gid; 1172531b1094SLatchesar Ionkov } 11735717144aSAneesh Kumar K.V if ((S_ISREG(inode->i_mode)) || (S_ISDIR(inode->i_mode))) { 11749652c732SAl Viro if (v9fs_proto_dotu(v9ses)) { 11759652c732SAl Viro unsigned int i_nlink; 11765717144aSAneesh Kumar K.V /* 11779652c732SAl Viro * Hadlink support got added later to the .u extension. 11789652c732SAl Viro * So there can be a server out there that doesn't 11799652c732SAl Viro * support this even with .u extension. That would 11809652c732SAl Viro * just leave us with stat->extension being an empty 11819652c732SAl Viro * string, though. 11825717144aSAneesh Kumar K.V */ 11835717144aSAneesh Kumar K.V /* HARDLINKCOUNT %u */ 11849652c732SAl Viro if (sscanf(stat->extension, 11859652c732SAl Viro " HARDLINKCOUNT %u", &i_nlink) == 1) 1186bfe86848SMiklos Szeredi set_nlink(inode, i_nlink); 11875717144aSAneesh Kumar K.V } 11885717144aSAneesh Kumar K.V } 1189df345c67SAneesh Kumar K.V mode = p9mode2perm(v9ses, stat); 119045089142SAneesh Kumar K.V mode |= inode->i_mode & ~S_IALLUGO; 119145089142SAneesh Kumar K.V inode->i_mode = mode; 11922bad8471SEric Van Hensbergen 11935e3cc1eeSHou Tao if (!(flags & V9FS_STAT2INODE_KEEP_ISIZE)) 11945e3cc1eeSHou Tao v9fs_i_size_write(inode, stat->length); 1195bd238fb4SLatchesar Ionkov /* not real number of blocks, but 512 byte ones ... */ 11965e3cc1eeSHou Tao inode->i_blocks = (stat->length + 512 - 1) >> 9; 1197b3cbea03SAneesh Kumar K.V v9inode->cache_validity &= ~V9FS_INO_INVALID_ATTR; 11982bad8471SEric Van Hensbergen } 11992bad8471SEric Van Hensbergen 12002bad8471SEric Van Hensbergen /** 12012bad8471SEric Van Hensbergen * v9fs_qid2ino - convert qid into inode number 12022bad8471SEric Van Hensbergen * @qid: qid to hash 12032bad8471SEric Van Hensbergen * 12042bad8471SEric Van Hensbergen * BUG: potential for inode number collisions? 12052bad8471SEric Van Hensbergen */ 12062bad8471SEric Van Hensbergen 1207bd238fb4SLatchesar Ionkov ino_t v9fs_qid2ino(struct p9_qid *qid) 12082bad8471SEric Van Hensbergen { 12092bad8471SEric Van Hensbergen u64 path = qid->path + 2; 12102bad8471SEric Van Hensbergen ino_t i = 0; 12112bad8471SEric Van Hensbergen 12122bad8471SEric Van Hensbergen if (sizeof(ino_t) == sizeof(path)) 12132bad8471SEric Van Hensbergen memcpy(&i, &path, sizeof(ino_t)); 12142bad8471SEric Van Hensbergen else 12152bad8471SEric Van Hensbergen i = (ino_t) (path ^ (path >> 32)); 12162bad8471SEric Van Hensbergen 12172bad8471SEric Van Hensbergen return i; 12182bad8471SEric Van Hensbergen } 12192bad8471SEric Van Hensbergen 12202bad8471SEric Van Hensbergen /** 12216b255391SAl Viro * v9fs_vfs_get_link - follow a symlink path 12222bad8471SEric Van Hensbergen * @dentry: dentry for symlink 12236b255391SAl Viro * @inode: inode for symlink 1224fceef393SAl Viro * @done: delayed call for when we are done with the return value 12252bad8471SEric Van Hensbergen */ 12262bad8471SEric Van Hensbergen 12276b255391SAl Viro static const char *v9fs_vfs_get_link(struct dentry *dentry, 1228fceef393SAl Viro struct inode *inode, 1229fceef393SAl Viro struct delayed_call *done) 12302bad8471SEric Van Hensbergen { 12316b255391SAl Viro struct v9fs_session_info *v9ses; 12326b255391SAl Viro struct p9_fid *fid; 123390e4fc88SAl Viro struct p9_wstat *st; 1234680baacbSAl Viro char *res; 12352bad8471SEric Van Hensbergen 12366b255391SAl Viro if (!dentry) 12376b255391SAl Viro return ERR_PTR(-ECHILD); 12386b255391SAl Viro 12396b255391SAl Viro v9ses = v9fs_dentry2v9ses(dentry); 1240e5690f26SDominique Martinet if (!v9fs_proto_dotu(v9ses)) 1241e5690f26SDominique Martinet return ERR_PTR(-EBADF); 1242e5690f26SDominique Martinet 12434b8e9923SAl Viro p9_debug(P9_DEBUG_VFS, "%pd\n", dentry); 1244e5690f26SDominique Martinet fid = v9fs_fid_lookup(dentry); 12452bad8471SEric Van Hensbergen 124690e4fc88SAl Viro if (IS_ERR(fid)) 124790e4fc88SAl Viro return ERR_CAST(fid); 12482bad8471SEric Van Hensbergen 124990e4fc88SAl Viro st = p9_client_stat(fid); 1250b48dbb99SDominique Martinet p9_fid_put(fid); 125190e4fc88SAl Viro if (IS_ERR(st)) 125290e4fc88SAl Viro return ERR_CAST(st); 125390e4fc88SAl Viro 125490e4fc88SAl Viro if (!(st->mode & P9_DMSYMLINK)) { 125590e4fc88SAl Viro p9stat_free(st); 125690e4fc88SAl Viro kfree(st); 125790e4fc88SAl Viro return ERR_PTR(-EINVAL); 12582bad8471SEric Van Hensbergen } 1259680baacbSAl Viro res = st->extension; 126090e4fc88SAl Viro st->extension = NULL; 1261680baacbSAl Viro if (strlen(res) >= PATH_MAX) 1262680baacbSAl Viro res[PATH_MAX - 1] = '\0'; 1263680baacbSAl Viro 126490e4fc88SAl Viro p9stat_free(st); 126590e4fc88SAl Viro kfree(st); 1266fceef393SAl Viro set_delayed_call(done, kfree_link, res); 1267fceef393SAl Viro return res; 12682bad8471SEric Van Hensbergen } 12692bad8471SEric Van Hensbergen 12702bad8471SEric Van Hensbergen /** 1271ee443996SEric Van Hensbergen * v9fs_vfs_mkspecial - create a special file 1272ee443996SEric Van Hensbergen * @dir: inode to create special file in 1273ee443996SEric Van Hensbergen * @dentry: dentry to create 1274fd2916bdSFabian Frederick * @perm: mode to create special file 1275ee443996SEric Van Hensbergen * @extension: 9p2000.u format extension string representing special file 1276ee443996SEric Van Hensbergen * 1277ee443996SEric Van Hensbergen */ 1278ee443996SEric Van Hensbergen 1279531b1094SLatchesar Ionkov static int v9fs_vfs_mkspecial(struct inode *dir, struct dentry *dentry, 1280c2837de7SAl Viro u32 perm, const char *extension) 1281531b1094SLatchesar Ionkov { 1282bd238fb4SLatchesar Ionkov struct p9_fid *fid; 1283d28c61f0SAneesh Kumar K.V struct v9fs_session_info *v9ses; 1284531b1094SLatchesar Ionkov 12856a3124a3SLatchesar Ionkov v9ses = v9fs_inode2v9ses(dir); 1286dd6102fbSSripathi Kodi if (!v9fs_proto_dotu(v9ses)) { 12875d385153SJoe Perches p9_debug(P9_DEBUG_ERROR, "not extended\n"); 12886a3124a3SLatchesar Ionkov return -EPERM; 1289531b1094SLatchesar Ionkov } 1290531b1094SLatchesar Ionkov 1291bd238fb4SLatchesar Ionkov fid = v9fs_create(v9ses, dir, dentry, (char *) extension, perm, 1292bd238fb4SLatchesar Ionkov P9_OREAD); 1293bd238fb4SLatchesar Ionkov if (IS_ERR(fid)) 1294bd238fb4SLatchesar Ionkov return PTR_ERR(fid); 1295da977b2cSEric Van Hensbergen 1296d28c61f0SAneesh Kumar K.V v9fs_invalidate_inode_attr(dir); 1297b48dbb99SDominique Martinet p9_fid_put(fid); 12986a3124a3SLatchesar Ionkov return 0; 1299531b1094SLatchesar Ionkov } 1300531b1094SLatchesar Ionkov 1301531b1094SLatchesar Ionkov /** 1302531b1094SLatchesar Ionkov * v9fs_vfs_symlink - helper function to create symlinks 13037a77db95SChristian Brauner * @idmap: idmap of the mount 1304531b1094SLatchesar Ionkov * @dir: directory inode containing symlink 1305531b1094SLatchesar Ionkov * @dentry: dentry for symlink 1306531b1094SLatchesar Ionkov * @symname: symlink data 1307531b1094SLatchesar Ionkov * 1308ee443996SEric Van Hensbergen * See Also: 9P2000.u RFC for more information 1309531b1094SLatchesar Ionkov * 1310531b1094SLatchesar Ionkov */ 1311531b1094SLatchesar Ionkov 1312531b1094SLatchesar Ionkov static int 13137a77db95SChristian Brauner v9fs_vfs_symlink(struct mnt_idmap *idmap, struct inode *dir, 1314549c7297SChristian Brauner struct dentry *dentry, const char *symname) 1315531b1094SLatchesar Ionkov { 13164b8e9923SAl Viro p9_debug(P9_DEBUG_VFS, " %lu,%pd,%s\n", 13174b8e9923SAl Viro dir->i_ino, dentry, symname); 1318531b1094SLatchesar Ionkov 1319c2837de7SAl Viro return v9fs_vfs_mkspecial(dir, dentry, P9_DMSYMLINK, symname); 1320531b1094SLatchesar Ionkov } 1321531b1094SLatchesar Ionkov 1322b46c267eSAl Viro #define U32_MAX_DIGITS 10 1323b46c267eSAl Viro 13242bad8471SEric Van Hensbergen /** 13252bad8471SEric Van Hensbergen * v9fs_vfs_link - create a hardlink 13262bad8471SEric Van Hensbergen * @old_dentry: dentry for file to link to 13272bad8471SEric Van Hensbergen * @dir: inode destination for new link 132873c592b9SEric Van Hensbergen * @dentry: dentry for link 13292bad8471SEric Van Hensbergen * 13302bad8471SEric Van Hensbergen */ 13312bad8471SEric Van Hensbergen 13322bad8471SEric Van Hensbergen static int 13332bad8471SEric Van Hensbergen v9fs_vfs_link(struct dentry *old_dentry, struct inode *dir, 13342bad8471SEric Van Hensbergen struct dentry *dentry) 13352bad8471SEric Van Hensbergen { 1336531b1094SLatchesar Ionkov int retval; 1337b46c267eSAl Viro char name[1 + U32_MAX_DIGITS + 2]; /* sign + number + \n + \0 */ 1338d28c61f0SAneesh Kumar K.V struct p9_fid *oldfid; 13392bad8471SEric Van Hensbergen 13404b8e9923SAl Viro p9_debug(P9_DEBUG_VFS, " %lu,%pd,%pd\n", 13414b8e9923SAl Viro dir->i_ino, dentry, old_dentry); 13422bad8471SEric Van Hensbergen 1343da977b2cSEric Van Hensbergen oldfid = v9fs_fid_clone(old_dentry); 1344da977b2cSEric Van Hensbergen if (IS_ERR(oldfid)) 1345da977b2cSEric Van Hensbergen return PTR_ERR(oldfid); 13462bad8471SEric Van Hensbergen 134716cce6d2SLatchesar Ionkov sprintf(name, "%d\n", oldfid->fid); 1348bd238fb4SLatchesar Ionkov retval = v9fs_vfs_mkspecial(dir, dentry, P9_DMLINK, name); 1349c06c066aSAneesh Kumar K.V if (!retval) { 13502b0143b5SDavid Howells v9fs_refresh_inode(oldfid, d_inode(old_dentry)); 1351d28c61f0SAneesh Kumar K.V v9fs_invalidate_inode_attr(dir); 1352c06c066aSAneesh Kumar K.V } 1353b48dbb99SDominique Martinet p9_fid_put(oldfid); 13542bad8471SEric Van Hensbergen return retval; 13552bad8471SEric Van Hensbergen } 13562bad8471SEric Van Hensbergen 13572bad8471SEric Van Hensbergen /** 13582bad8471SEric Van Hensbergen * v9fs_vfs_mknod - create a special file 1359*5ebb29beSChristian Brauner * @idmap: idmap of the mount 13602bad8471SEric Van Hensbergen * @dir: inode destination for new link 13612bad8471SEric Van Hensbergen * @dentry: dentry for file 13622bad8471SEric Van Hensbergen * @mode: mode for creation 1363ee443996SEric Van Hensbergen * @rdev: device associated with special file 13642bad8471SEric Van Hensbergen * 13652bad8471SEric Van Hensbergen */ 13662bad8471SEric Van Hensbergen 13672bad8471SEric Van Hensbergen static int 1368*5ebb29beSChristian Brauner v9fs_vfs_mknod(struct mnt_idmap *idmap, struct inode *dir, 1369549c7297SChristian Brauner struct dentry *dentry, umode_t mode, dev_t rdev) 13702bad8471SEric Van Hensbergen { 1371c2837de7SAl Viro struct v9fs_session_info *v9ses = v9fs_inode2v9ses(dir); 1372531b1094SLatchesar Ionkov int retval; 1373b46c267eSAl Viro char name[2 + U32_MAX_DIGITS + 1 + U32_MAX_DIGITS + 1]; 1374c2837de7SAl Viro u32 perm; 13752bad8471SEric Van Hensbergen 13766e195b0fSDominique Martinet p9_debug(P9_DEBUG_VFS, " %lu,%pd mode: %x MAJOR: %u MINOR: %u\n", 13774b8e9923SAl Viro dir->i_ino, dentry, mode, 13785d385153SJoe Perches MAJOR(rdev), MINOR(rdev)); 13792bad8471SEric Van Hensbergen 13802bad8471SEric Van Hensbergen /* build extension */ 13812bad8471SEric Van Hensbergen if (S_ISBLK(mode)) 1382531b1094SLatchesar Ionkov sprintf(name, "b %u %u", MAJOR(rdev), MINOR(rdev)); 13832bad8471SEric Van Hensbergen else if (S_ISCHR(mode)) 1384531b1094SLatchesar Ionkov sprintf(name, "c %u %u", MAJOR(rdev), MINOR(rdev)); 1385b46c267eSAl Viro else 1386531b1094SLatchesar Ionkov *name = 0; 13872bad8471SEric Van Hensbergen 1388c2837de7SAl Viro perm = unixmode2p9mode(v9ses, mode); 1389c2837de7SAl Viro retval = v9fs_vfs_mkspecial(dir, dentry, perm, name); 13902bad8471SEric Van Hensbergen 13912bad8471SEric Van Hensbergen return retval; 13922bad8471SEric Van Hensbergen } 13932bad8471SEric Van Hensbergen 1394b3cbea03SAneesh Kumar K.V int v9fs_refresh_inode(struct p9_fid *fid, struct inode *inode) 1395b3cbea03SAneesh Kumar K.V { 139645089142SAneesh Kumar K.V int umode; 139745089142SAneesh Kumar K.V dev_t rdev; 1398b3cbea03SAneesh Kumar K.V struct p9_wstat *st; 1399b3cbea03SAneesh Kumar K.V struct v9fs_session_info *v9ses; 14005e3cc1eeSHou Tao unsigned int flags; 1401b3cbea03SAneesh Kumar K.V 1402b3cbea03SAneesh Kumar K.V v9ses = v9fs_inode2v9ses(inode); 1403b3cbea03SAneesh Kumar K.V st = p9_client_stat(fid); 1404b3cbea03SAneesh Kumar K.V if (IS_ERR(st)) 1405b3cbea03SAneesh Kumar K.V return PTR_ERR(st); 140645089142SAneesh Kumar K.V /* 140745089142SAneesh Kumar K.V * Don't update inode if the file type is different 140845089142SAneesh Kumar K.V */ 140945089142SAneesh Kumar K.V umode = p9mode2unixmode(v9ses, st, &rdev); 14106e3e2c43SAl Viro if (inode_wrong_type(inode, umode)) 141145089142SAneesh Kumar K.V goto out; 1412b3cbea03SAneesh Kumar K.V 1413b3cbea03SAneesh Kumar K.V /* 1414b3cbea03SAneesh Kumar K.V * We don't want to refresh inode->i_size, 1415b3cbea03SAneesh Kumar K.V * because we may have cached data 1416b3cbea03SAneesh Kumar K.V */ 14175e3cc1eeSHou Tao flags = (v9ses->cache == CACHE_LOOSE || v9ses->cache == CACHE_FSCACHE) ? 14185e3cc1eeSHou Tao V9FS_STAT2INODE_KEEP_ISIZE : 0; 14195e3cc1eeSHou Tao v9fs_stat2inode(st, inode, inode->i_sb, flags); 142045089142SAneesh Kumar K.V out: 1421b3cbea03SAneesh Kumar K.V p9stat_free(st); 1422b3cbea03SAneesh Kumar K.V kfree(st); 1423b3cbea03SAneesh Kumar K.V return 0; 1424b3cbea03SAneesh Kumar K.V } 1425b3cbea03SAneesh Kumar K.V 14269b6533c9SSripathi Kodi static const struct inode_operations v9fs_dir_inode_operations_dotu = { 14279b6533c9SSripathi Kodi .create = v9fs_vfs_create, 14289b6533c9SSripathi Kodi .lookup = v9fs_vfs_lookup, 1429e43ae79cSMiklos Szeredi .atomic_open = v9fs_vfs_atomic_open, 14309b6533c9SSripathi Kodi .symlink = v9fs_vfs_symlink, 143150cc42ffSVenkateswararao Jujjuri (JV) .link = v9fs_vfs_link, 14329b6533c9SSripathi Kodi .unlink = v9fs_vfs_unlink, 14339b6533c9SSripathi Kodi .mkdir = v9fs_vfs_mkdir, 14349b6533c9SSripathi Kodi .rmdir = v9fs_vfs_rmdir, 14351d76e313SAneesh Kumar K.V .mknod = v9fs_vfs_mknod, 14369b6533c9SSripathi Kodi .rename = v9fs_vfs_rename, 14379b6533c9SSripathi Kodi .getattr = v9fs_vfs_getattr, 14389b6533c9SSripathi Kodi .setattr = v9fs_vfs_setattr, 14399b6533c9SSripathi Kodi }; 14409b6533c9SSripathi Kodi 1441754661f1SArjan van de Ven static const struct inode_operations v9fs_dir_inode_operations = { 1442b501611aSEric Van Hensbergen .create = v9fs_vfs_create, 1443b501611aSEric Van Hensbergen .lookup = v9fs_vfs_lookup, 1444e43ae79cSMiklos Szeredi .atomic_open = v9fs_vfs_atomic_open, 1445b501611aSEric Van Hensbergen .unlink = v9fs_vfs_unlink, 1446b501611aSEric Van Hensbergen .mkdir = v9fs_vfs_mkdir, 1447b501611aSEric Van Hensbergen .rmdir = v9fs_vfs_rmdir, 1448b501611aSEric Van Hensbergen .mknod = v9fs_vfs_mknod, 1449b501611aSEric Van Hensbergen .rename = v9fs_vfs_rename, 1450b501611aSEric Van Hensbergen .getattr = v9fs_vfs_getattr, 1451b501611aSEric Van Hensbergen .setattr = v9fs_vfs_setattr, 1452b501611aSEric Van Hensbergen }; 1453b501611aSEric Van Hensbergen 1454754661f1SArjan van de Ven static const struct inode_operations v9fs_file_inode_operations = { 14552bad8471SEric Van Hensbergen .getattr = v9fs_vfs_getattr, 14562bad8471SEric Van Hensbergen .setattr = v9fs_vfs_setattr, 14572bad8471SEric Van Hensbergen }; 14582bad8471SEric Van Hensbergen 1459754661f1SArjan van de Ven static const struct inode_operations v9fs_symlink_inode_operations = { 14606b255391SAl Viro .get_link = v9fs_vfs_get_link, 14612bad8471SEric Van Hensbergen .getattr = v9fs_vfs_getattr, 14622bad8471SEric Van Hensbergen .setattr = v9fs_vfs_setattr, 14632bad8471SEric Van Hensbergen }; 14649b6533c9SSripathi Kodi 1465