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; 233b3cbea03SAneesh Kumar K.V v9inode->cache_validity = 0; 2345a7e0a8cSAneesh Kumar K.V mutex_init(&v9inode->v_mutex); 235874c8ca1SDavid Howells return &v9inode->netfs.inode; 23660e78d2cSAbhishek Kulkarni } 23760e78d2cSAbhishek Kulkarni 23860e78d2cSAbhishek Kulkarni /** 2395e8a0770SAl Viro * v9fs_free_inode - destroy an inode 240bc868036SDavid Howells * @inode: The inode to be freed 24160e78d2cSAbhishek Kulkarni */ 24260e78d2cSAbhishek Kulkarni 2435e8a0770SAl Viro void v9fs_free_inode(struct inode *inode) 244fa0d7e3dSNick Piggin { 245a78ce05dSAneesh Kumar K.V kmem_cache_free(v9fs_inode_cache, V9FS_I(inode)); 246fa0d7e3dSNick Piggin } 247fa0d7e3dSNick Piggin 248bc899ee1SDavid Howells /* 249bc899ee1SDavid Howells * Set parameters for the netfs library 250bc899ee1SDavid Howells */ 251bc899ee1SDavid Howells static void v9fs_set_netfs_context(struct inode *inode) 252bc899ee1SDavid Howells { 253e81fb419SLinus Torvalds struct v9fs_inode *v9inode = V9FS_I(inode); 254e81fb419SLinus Torvalds netfs_inode_init(&v9inode->netfs, &v9fs_req_ops); 255bc899ee1SDavid Howells } 256bc899ee1SDavid Howells 2575ffc0cb3SAneesh Kumar K.V int v9fs_init_inode(struct v9fs_session_info *v9ses, 2583eda0de6SAl Viro struct inode *inode, umode_t mode, dev_t rdev) 2592bad8471SEric Van Hensbergen { 2605ffc0cb3SAneesh Kumar K.V int err = 0; 2612bb54115SAbhishek Kulkarni 262f2d40141SChristian Brauner inode_init_owner(&nop_mnt_idmap, inode, NULL, mode); 2632bad8471SEric Van Hensbergen inode->i_blocks = 0; 26445089142SAneesh Kumar K.V inode->i_rdev = rdev; 265078cd827SDeepa Dinamani inode->i_atime = inode->i_mtime = inode->i_ctime = current_time(inode); 266147b31cfSEric Van Hensbergen inode->i_mapping->a_ops = &v9fs_addr_operations; 267987a6485SGreg Kurz inode->i_private = NULL; 2682bad8471SEric Van Hensbergen 2692bad8471SEric Van Hensbergen switch (mode & S_IFMT) { 2702bad8471SEric Van Hensbergen case S_IFIFO: 2712bad8471SEric Van Hensbergen case S_IFBLK: 2722bad8471SEric Van Hensbergen case S_IFCHR: 2732bad8471SEric Van Hensbergen case S_IFSOCK: 2744b43516aSM. Mohan Kumar if (v9fs_proto_dotl(v9ses)) { 2754b43516aSM. Mohan Kumar inode->i_op = &v9fs_file_inode_operations_dotl; 2764b43516aSM. Mohan Kumar } else if (v9fs_proto_dotu(v9ses)) { 2774b43516aSM. Mohan Kumar inode->i_op = &v9fs_file_inode_operations; 2784b43516aSM. Mohan Kumar } else { 2795d385153SJoe Perches p9_debug(P9_DEBUG_ERROR, 280bd238fb4SLatchesar Ionkov "special files without extended mode\n"); 2812bb54115SAbhishek Kulkarni err = -EINVAL; 2822bb54115SAbhishek Kulkarni goto error; 283b501611aSEric Van Hensbergen } 2842bb54115SAbhishek Kulkarni init_special_inode(inode, inode->i_mode, inode->i_rdev); 2855d58bec5SEric Van Hensbergen break; 2862bad8471SEric Van Hensbergen case S_IFREG: 2879b6533c9SSripathi Kodi if (v9fs_proto_dotl(v9ses)) { 2889b6533c9SSripathi Kodi inode->i_op = &v9fs_file_inode_operations_dotl; 2899b6533c9SSripathi Kodi inode->i_fop = &v9fs_file_operations_dotl; 2909b6533c9SSripathi Kodi } else { 2912bad8471SEric Van Hensbergen inode->i_op = &v9fs_file_inode_operations; 2922bad8471SEric Van Hensbergen inode->i_fop = &v9fs_file_operations; 2939b6533c9SSripathi Kodi } 2949b6533c9SSripathi Kodi 2952bad8471SEric Van Hensbergen break; 296b501611aSEric Van Hensbergen case S_IFLNK: 2979b6533c9SSripathi Kodi if (!v9fs_proto_dotu(v9ses) && !v9fs_proto_dotl(v9ses)) { 2985d385153SJoe Perches p9_debug(P9_DEBUG_ERROR, 2995d385153SJoe Perches "extended modes used with legacy protocol\n"); 3002bb54115SAbhishek Kulkarni err = -EINVAL; 3012bb54115SAbhishek Kulkarni goto error; 302b501611aSEric Van Hensbergen } 3039b6533c9SSripathi Kodi 3049b6533c9SSripathi Kodi if (v9fs_proto_dotl(v9ses)) 3059b6533c9SSripathi Kodi inode->i_op = &v9fs_symlink_inode_operations_dotl; 3069b6533c9SSripathi Kodi else 307b501611aSEric Van Hensbergen inode->i_op = &v9fs_symlink_inode_operations; 3089b6533c9SSripathi Kodi 309b501611aSEric Van Hensbergen break; 3102bad8471SEric Van Hensbergen case S_IFDIR: 311d8c76e6fSDave Hansen inc_nlink(inode); 3129b6533c9SSripathi Kodi if (v9fs_proto_dotl(v9ses)) 3139b6533c9SSripathi Kodi inode->i_op = &v9fs_dir_inode_operations_dotl; 3149b6533c9SSripathi Kodi else if (v9fs_proto_dotu(v9ses)) 3159b6533c9SSripathi Kodi inode->i_op = &v9fs_dir_inode_operations_dotu; 316b501611aSEric Van Hensbergen else 3172bad8471SEric Van Hensbergen inode->i_op = &v9fs_dir_inode_operations; 3189b6533c9SSripathi Kodi 3199b6533c9SSripathi Kodi if (v9fs_proto_dotl(v9ses)) 3209b6533c9SSripathi Kodi inode->i_fop = &v9fs_dir_operations_dotl; 3219b6533c9SSripathi Kodi else 3222bad8471SEric Van Hensbergen inode->i_fop = &v9fs_dir_operations; 3239b6533c9SSripathi Kodi 3242bad8471SEric Van Hensbergen break; 3252bad8471SEric Van Hensbergen default: 326609eac1cSLinus Torvalds p9_debug(P9_DEBUG_ERROR, "BAD mode 0x%hx S_IFMT 0x%x\n", 3272bad8471SEric Van Hensbergen mode, mode & S_IFMT); 3282bb54115SAbhishek Kulkarni err = -EINVAL; 3292bb54115SAbhishek Kulkarni goto error; 3302bad8471SEric Van Hensbergen } 331bc899ee1SDavid Howells 332bc899ee1SDavid Howells v9fs_set_netfs_context(inode); 3332bb54115SAbhishek Kulkarni error: 3345ffc0cb3SAneesh Kumar K.V return err; 3355ffc0cb3SAneesh Kumar K.V 3365ffc0cb3SAneesh Kumar K.V } 3375ffc0cb3SAneesh Kumar K.V 3385ffc0cb3SAneesh Kumar K.V /** 3395ffc0cb3SAneesh Kumar K.V * v9fs_get_inode - helper function to setup an inode 3405ffc0cb3SAneesh Kumar K.V * @sb: superblock 3415ffc0cb3SAneesh Kumar K.V * @mode: mode to setup inode with 342bc868036SDavid Howells * @rdev: The device numbers to set 3435ffc0cb3SAneesh Kumar K.V */ 3445ffc0cb3SAneesh Kumar K.V 3453eda0de6SAl Viro struct inode *v9fs_get_inode(struct super_block *sb, umode_t mode, dev_t rdev) 3465ffc0cb3SAneesh Kumar K.V { 3475ffc0cb3SAneesh Kumar K.V int err; 3485ffc0cb3SAneesh Kumar K.V struct inode *inode; 3495ffc0cb3SAneesh Kumar K.V struct v9fs_session_info *v9ses = sb->s_fs_info; 3505ffc0cb3SAneesh Kumar K.V 351609eac1cSLinus Torvalds p9_debug(P9_DEBUG_VFS, "super block: %p mode: %ho\n", sb, mode); 3525ffc0cb3SAneesh Kumar K.V 3535ffc0cb3SAneesh Kumar K.V inode = new_inode(sb); 3545ffc0cb3SAneesh Kumar K.V if (!inode) { 3555d385153SJoe Perches pr_warn("%s (%d): Problem allocating inode\n", 3565d385153SJoe Perches __func__, task_pid_nr(current)); 3575ffc0cb3SAneesh Kumar K.V return ERR_PTR(-ENOMEM); 3585ffc0cb3SAneesh Kumar K.V } 35945089142SAneesh Kumar K.V err = v9fs_init_inode(v9ses, inode, mode, rdev); 3605ffc0cb3SAneesh Kumar K.V if (err) { 3612bb54115SAbhishek Kulkarni iput(inode); 3622bb54115SAbhishek Kulkarni return ERR_PTR(err); 3632bad8471SEric Van Hensbergen } 3645ffc0cb3SAneesh Kumar K.V return inode; 3655ffc0cb3SAneesh Kumar K.V } 3662bad8471SEric Van Hensbergen 36760e78d2cSAbhishek Kulkarni /** 368bc868036SDavid Howells * v9fs_evict_inode - Remove an inode from the inode cache 36960e78d2cSAbhishek Kulkarni * @inode: inode to release 37060e78d2cSAbhishek Kulkarni * 37160e78d2cSAbhishek Kulkarni */ 372b57922d9SAl Viro void v9fs_evict_inode(struct inode *inode) 37360e78d2cSAbhishek Kulkarni { 3746b39f6d2SAneesh Kumar K.V struct v9fs_inode *v9inode = V9FS_I(inode); 37593c84614SDavid Howells __le32 version; 3766b39f6d2SAneesh Kumar K.V 3774ad78628SAl Viro truncate_inode_pages_final(&inode->i_data); 37893c84614SDavid Howells version = cpu_to_le32(v9inode->qid.version); 37993c84614SDavid Howells fscache_clear_inode_writeback(v9fs_inode_cookie(v9inode), inode, 38093c84614SDavid Howells &version); 381dbd5768fSJan Kara clear_inode(inode); 3824ad78628SAl Viro filemap_fdatawrite(&inode->i_data); 38360e78d2cSAbhishek Kulkarni 38424e42e32SDavid Howells fscache_relinquish_cookie(v9fs_inode_cookie(v9inode), false); 3853cf387d7SAneesh Kumar K.V } 38660e78d2cSAbhishek Kulkarni 387fd2421f5SAneesh Kumar K.V static int v9fs_test_inode(struct inode *inode, void *data) 388fd2421f5SAneesh Kumar K.V { 389fd2421f5SAneesh Kumar K.V int umode; 39045089142SAneesh Kumar K.V dev_t rdev; 391fd2421f5SAneesh Kumar K.V struct v9fs_inode *v9inode = V9FS_I(inode); 392fd2421f5SAneesh Kumar K.V struct p9_wstat *st = (struct p9_wstat *)data; 393fd2421f5SAneesh Kumar K.V struct v9fs_session_info *v9ses = v9fs_inode2v9ses(inode); 394fd2421f5SAneesh Kumar K.V 39545089142SAneesh Kumar K.V umode = p9mode2unixmode(v9ses, st, &rdev); 396fd2421f5SAneesh Kumar K.V /* don't match inode of different type */ 3976e3e2c43SAl Viro if (inode_wrong_type(inode, umode)) 398fd2421f5SAneesh Kumar K.V return 0; 399fd2421f5SAneesh Kumar K.V 400fd2421f5SAneesh Kumar K.V /* compare qid details */ 401fd2421f5SAneesh Kumar K.V if (memcmp(&v9inode->qid.version, 402fd2421f5SAneesh Kumar K.V &st->qid.version, sizeof(v9inode->qid.version))) 403fd2421f5SAneesh Kumar K.V return 0; 404fd2421f5SAneesh Kumar K.V 405fd2421f5SAneesh Kumar K.V if (v9inode->qid.type != st->qid.type) 406fd2421f5SAneesh Kumar K.V return 0; 4078ee03163STuomas Tynkkynen 4088ee03163STuomas Tynkkynen if (v9inode->qid.path != st->qid.path) 4098ee03163STuomas Tynkkynen return 0; 410fd2421f5SAneesh Kumar K.V return 1; 411fd2421f5SAneesh Kumar K.V } 412fd2421f5SAneesh Kumar K.V 413ed80fcfaSAneesh Kumar K.V static int v9fs_test_new_inode(struct inode *inode, void *data) 414ed80fcfaSAneesh Kumar K.V { 415ed80fcfaSAneesh Kumar K.V return 0; 416ed80fcfaSAneesh Kumar K.V } 417ed80fcfaSAneesh Kumar K.V 418fd2421f5SAneesh Kumar K.V static int v9fs_set_inode(struct inode *inode, void *data) 419fd2421f5SAneesh Kumar K.V { 420fd2421f5SAneesh Kumar K.V struct v9fs_inode *v9inode = V9FS_I(inode); 421fd2421f5SAneesh Kumar K.V struct p9_wstat *st = (struct p9_wstat *)data; 422fd2421f5SAneesh Kumar K.V 423fd2421f5SAneesh Kumar K.V memcpy(&v9inode->qid, &st->qid, sizeof(st->qid)); 424fd2421f5SAneesh Kumar K.V return 0; 425fd2421f5SAneesh Kumar K.V } 426fd2421f5SAneesh Kumar K.V 4275ffc0cb3SAneesh Kumar K.V static struct inode *v9fs_qid_iget(struct super_block *sb, 4285ffc0cb3SAneesh Kumar K.V struct p9_qid *qid, 429ed80fcfaSAneesh Kumar K.V struct p9_wstat *st, 430ed80fcfaSAneesh Kumar K.V int new) 4315ffc0cb3SAneesh Kumar K.V { 43245089142SAneesh Kumar K.V dev_t rdev; 4333eda0de6SAl Viro int retval; 4343eda0de6SAl Viro umode_t umode; 4355ffc0cb3SAneesh Kumar K.V unsigned long i_ino; 4365ffc0cb3SAneesh Kumar K.V struct inode *inode; 4375ffc0cb3SAneesh Kumar K.V struct v9fs_session_info *v9ses = sb->s_fs_info; 4386e195b0fSDominique Martinet int (*test)(struct inode *inode, void *data); 439ed80fcfaSAneesh Kumar K.V 440ed80fcfaSAneesh Kumar K.V if (new) 441ed80fcfaSAneesh Kumar K.V test = v9fs_test_new_inode; 442ed80fcfaSAneesh Kumar K.V else 443ed80fcfaSAneesh Kumar K.V test = v9fs_test_inode; 4445ffc0cb3SAneesh Kumar K.V 4455ffc0cb3SAneesh Kumar K.V i_ino = v9fs_qid2ino(qid); 446ed80fcfaSAneesh Kumar K.V inode = iget5_locked(sb, i_ino, test, v9fs_set_inode, st); 4475ffc0cb3SAneesh Kumar K.V if (!inode) 4485ffc0cb3SAneesh Kumar K.V return ERR_PTR(-ENOMEM); 4495ffc0cb3SAneesh Kumar K.V if (!(inode->i_state & I_NEW)) 4505ffc0cb3SAneesh Kumar K.V return inode; 4515ffc0cb3SAneesh Kumar K.V /* 4525ffc0cb3SAneesh Kumar K.V * initialize the inode with the stat info 4535ffc0cb3SAneesh Kumar K.V * FIXME!! we may need support for stale inodes 4545ffc0cb3SAneesh Kumar K.V * later. 4555ffc0cb3SAneesh Kumar K.V */ 456fd2421f5SAneesh Kumar K.V inode->i_ino = i_ino; 45745089142SAneesh Kumar K.V umode = p9mode2unixmode(v9ses, st, &rdev); 45845089142SAneesh Kumar K.V retval = v9fs_init_inode(v9ses, inode, umode, rdev); 4595ffc0cb3SAneesh Kumar K.V if (retval) 4605ffc0cb3SAneesh Kumar K.V goto error; 4615ffc0cb3SAneesh Kumar K.V 4625e3cc1eeSHou Tao v9fs_stat2inode(st, inode, sb, 0); 4635ffc0cb3SAneesh Kumar K.V v9fs_cache_inode_get_cookie(inode); 4645ffc0cb3SAneesh Kumar K.V unlock_new_inode(inode); 4655ffc0cb3SAneesh Kumar K.V return inode; 4665ffc0cb3SAneesh Kumar K.V error: 4670a73d0a2SAl Viro iget_failed(inode); 4685ffc0cb3SAneesh Kumar K.V return ERR_PTR(retval); 4695ffc0cb3SAneesh Kumar K.V 4705ffc0cb3SAneesh Kumar K.V } 4715ffc0cb3SAneesh Kumar K.V 47253c06f4eSAneesh Kumar K.V struct inode * 473a78ce05dSAneesh Kumar K.V v9fs_inode_from_fid(struct v9fs_session_info *v9ses, struct p9_fid *fid, 474ed80fcfaSAneesh Kumar K.V struct super_block *sb, int new) 4756a3124a3SLatchesar Ionkov { 47651a87c55SEric Van Hensbergen struct p9_wstat *st; 4775ffc0cb3SAneesh Kumar K.V struct inode *inode = NULL; 4786a3124a3SLatchesar Ionkov 479bd238fb4SLatchesar Ionkov st = p9_client_stat(fid); 48002bc3567SAbhishek Kulkarni if (IS_ERR(st)) 48102bc3567SAbhishek Kulkarni return ERR_CAST(st); 4822bad8471SEric Van Hensbergen 483ed80fcfaSAneesh Kumar K.V inode = v9fs_qid_iget(sb, &st->qid, st, new); 48402bc3567SAbhishek Kulkarni p9stat_free(st); 485bd238fb4SLatchesar Ionkov kfree(st); 4865ffc0cb3SAneesh Kumar K.V return inode; 4872bad8471SEric Van Hensbergen } 4882bad8471SEric Van Hensbergen 4892bad8471SEric Van Hensbergen /** 490f88657ceSAneesh Kumar K.V * v9fs_at_to_dotl_flags- convert Linux specific AT flags to 491f88657ceSAneesh Kumar K.V * plan 9 AT flag. 492f88657ceSAneesh Kumar K.V * @flags: flags to convert 493f88657ceSAneesh Kumar K.V */ 494f88657ceSAneesh Kumar K.V static int v9fs_at_to_dotl_flags(int flags) 495f88657ceSAneesh Kumar K.V { 496f88657ceSAneesh Kumar K.V int rflags = 0; 4976e195b0fSDominique Martinet 498f88657ceSAneesh Kumar K.V if (flags & AT_REMOVEDIR) 499f88657ceSAneesh Kumar K.V rflags |= P9_DOTL_AT_REMOVEDIR; 5006e195b0fSDominique Martinet 501f88657ceSAneesh Kumar K.V return rflags; 502f88657ceSAneesh Kumar K.V } 503f88657ceSAneesh Kumar K.V 504f88657ceSAneesh Kumar K.V /** 505ac89b2efSEryu Guan * v9fs_dec_count - helper functon to drop i_nlink. 506ac89b2efSEryu Guan * 507ac89b2efSEryu Guan * If a directory had nlink <= 2 (including . and ..), then we should not drop 508ac89b2efSEryu Guan * the link count, which indicates the underlying exported fs doesn't maintain 509ac89b2efSEryu Guan * nlink accurately. e.g. 510ac89b2efSEryu Guan * - overlayfs sets nlink to 1 for merged dir 511ac89b2efSEryu Guan * - ext4 (with dir_nlink feature enabled) sets nlink to 1 if a dir has more 512ac89b2efSEryu Guan * than EXT4_LINK_MAX (65000) links. 513ac89b2efSEryu Guan * 514ac89b2efSEryu Guan * @inode: inode whose nlink is being dropped 515ac89b2efSEryu Guan */ 516ac89b2efSEryu Guan static void v9fs_dec_count(struct inode *inode) 517ac89b2efSEryu Guan { 518ac89b2efSEryu Guan if (!S_ISDIR(inode->i_mode) || inode->i_nlink > 2) 519ac89b2efSEryu Guan drop_nlink(inode); 520ac89b2efSEryu Guan } 521ac89b2efSEryu Guan 522ac89b2efSEryu Guan /** 5232bad8471SEric Van Hensbergen * v9fs_remove - helper function to remove files and directories 52473c592b9SEric Van Hensbergen * @dir: directory inode that is being deleted 52548e370ffSAneesh Kumar K.V * @dentry: dentry that is being deleted 526fd2916bdSFabian Frederick * @flags: removing a directory 5272bad8471SEric Van Hensbergen * 5282bad8471SEric Van Hensbergen */ 5292bad8471SEric Van Hensbergen 53048e370ffSAneesh Kumar K.V static int v9fs_remove(struct inode *dir, struct dentry *dentry, int flags) 5312bad8471SEric Van Hensbergen { 53248e370ffSAneesh Kumar K.V struct inode *inode; 53348e370ffSAneesh Kumar K.V int retval = -EOPNOTSUPP; 53448e370ffSAneesh Kumar K.V struct p9_fid *v9fid, *dfid; 53548e370ffSAneesh Kumar K.V struct v9fs_session_info *v9ses; 5362bad8471SEric Van Hensbergen 5375d385153SJoe Perches p9_debug(P9_DEBUG_VFS, "inode: %p dentry: %p rmdir: %x\n", 53848e370ffSAneesh Kumar K.V dir, dentry, flags); 5392bad8471SEric Van Hensbergen 54048e370ffSAneesh Kumar K.V v9ses = v9fs_inode2v9ses(dir); 5412b0143b5SDavid Howells inode = d_inode(dentry); 54277d5a6b7SAl Viro dfid = v9fs_parent_fid(dentry); 54348e370ffSAneesh Kumar K.V if (IS_ERR(dfid)) { 54448e370ffSAneesh Kumar K.V retval = PTR_ERR(dfid); 5455d385153SJoe Perches p9_debug(P9_DEBUG_VFS, "fid lookup failed %d\n", retval); 54648e370ffSAneesh Kumar K.V return retval; 54748e370ffSAneesh Kumar K.V } 54848e370ffSAneesh Kumar K.V if (v9fs_proto_dotl(v9ses)) 549f88657ceSAneesh Kumar K.V retval = p9_client_unlinkat(dfid, dentry->d_name.name, 550f88657ceSAneesh Kumar K.V v9fs_at_to_dotl_flags(flags)); 551b48dbb99SDominique Martinet p9_fid_put(dfid); 55248e370ffSAneesh Kumar K.V if (retval == -EOPNOTSUPP) { 55348e370ffSAneesh Kumar K.V /* Try the one based on path */ 55448e370ffSAneesh Kumar K.V v9fid = v9fs_fid_clone(dentry); 555da977b2cSEric Van Hensbergen if (IS_ERR(v9fid)) 556da977b2cSEric Van Hensbergen return PTR_ERR(v9fid); 557d994f405SAneesh Kumar K.V retval = p9_client_remove(v9fid); 55848e370ffSAneesh Kumar K.V } 559b271ec47SAneesh Kumar K.V if (!retval) { 560b271ec47SAneesh Kumar K.V /* 561b271ec47SAneesh Kumar K.V * directories on unlink should have zero 562b271ec47SAneesh Kumar K.V * link count 563b271ec47SAneesh Kumar K.V */ 56448e370ffSAneesh Kumar K.V if (flags & AT_REMOVEDIR) { 56548e370ffSAneesh Kumar K.V clear_nlink(inode); 566ac89b2efSEryu Guan v9fs_dec_count(dir); 567b271ec47SAneesh Kumar K.V } else 568ac89b2efSEryu Guan v9fs_dec_count(inode); 569d28c61f0SAneesh Kumar K.V 57048e370ffSAneesh Kumar K.V v9fs_invalidate_inode_attr(inode); 571d28c61f0SAneesh Kumar K.V v9fs_invalidate_inode_attr(dir); 572154372e6SEric Van Hensbergen 573154372e6SEric Van Hensbergen /* invalidate all fids associated with dentry */ 574154372e6SEric Van Hensbergen /* NOTE: This will not include open fids */ 575154372e6SEric Van Hensbergen dentry->d_op->d_release(dentry); 576b271ec47SAneesh Kumar K.V } 577d994f405SAneesh Kumar K.V return retval; 5782bad8471SEric Van Hensbergen } 5792bad8471SEric Van Hensbergen 580bd238fb4SLatchesar Ionkov /** 581bd238fb4SLatchesar Ionkov * v9fs_create - Create a file 582ee443996SEric Van Hensbergen * @v9ses: session information 583ee443996SEric Van Hensbergen * @dir: directory that dentry is being created in 584bd238fb4SLatchesar Ionkov * @dentry: dentry that is being created 5850e15597eSAbhishek Kulkarni * @extension: 9p2000.u extension string to support devices, etc. 586bd238fb4SLatchesar Ionkov * @perm: create permissions 587bd238fb4SLatchesar Ionkov * @mode: open mode 588bd238fb4SLatchesar Ionkov * 589bd238fb4SLatchesar Ionkov */ 590bd238fb4SLatchesar Ionkov static struct p9_fid * 591bd238fb4SLatchesar Ionkov v9fs_create(struct v9fs_session_info *v9ses, struct inode *dir, 592bd238fb4SLatchesar Ionkov struct dentry *dentry, char *extension, u32 perm, u8 mode) 593bd238fb4SLatchesar Ionkov { 594bd238fb4SLatchesar Ionkov int err; 5957880b43bSAl Viro const unsigned char *name; 5966636b6dcSJianyong Wu struct p9_fid *dfid, *ofid = NULL, *fid = NULL; 597bd238fb4SLatchesar Ionkov struct inode *inode; 598bd238fb4SLatchesar Ionkov 5994b8e9923SAl Viro p9_debug(P9_DEBUG_VFS, "name %pd\n", dentry); 60051a87c55SEric Van Hensbergen 601bd238fb4SLatchesar Ionkov err = 0; 6027880b43bSAl Viro name = dentry->d_name.name; 60377d5a6b7SAl Viro dfid = v9fs_parent_fid(dentry); 604bd238fb4SLatchesar Ionkov if (IS_ERR(dfid)) { 605bd238fb4SLatchesar Ionkov err = PTR_ERR(dfid); 6065d385153SJoe Perches p9_debug(P9_DEBUG_VFS, "fid lookup failed %d\n", err); 6076d27e64dSVenkateswararao Jujjuri return ERR_PTR(err); 608bd238fb4SLatchesar Ionkov } 609bd238fb4SLatchesar Ionkov 610bd238fb4SLatchesar Ionkov /* clone a fid to use for creation */ 6117d50a29fSAl Viro ofid = clone_fid(dfid); 612bd238fb4SLatchesar Ionkov if (IS_ERR(ofid)) { 613bd238fb4SLatchesar Ionkov err = PTR_ERR(ofid); 6145d385153SJoe Perches p9_debug(P9_DEBUG_VFS, "p9_client_walk failed %d\n", err); 615dafbe689SDominique Martinet goto error; 616bd238fb4SLatchesar Ionkov } 617bd238fb4SLatchesar Ionkov 618bd238fb4SLatchesar Ionkov err = p9_client_fcreate(ofid, name, perm, mode, extension); 61951a87c55SEric Van Hensbergen if (err < 0) { 6205d385153SJoe Perches p9_debug(P9_DEBUG_VFS, "p9_client_fcreate failed %d\n", err); 621bd238fb4SLatchesar Ionkov goto error; 62251a87c55SEric Van Hensbergen } 623bd238fb4SLatchesar Ionkov 624b6054793SAneesh Kumar K.V if (!(perm & P9_DMLINK)) { 625bd238fb4SLatchesar Ionkov /* now walk from the parent so we can get unopened fid */ 6266d27e64dSVenkateswararao Jujjuri fid = p9_client_walk(dfid, 1, &name, 1); 627bd238fb4SLatchesar Ionkov if (IS_ERR(fid)) { 628bd238fb4SLatchesar Ionkov err = PTR_ERR(fid); 629b6054793SAneesh Kumar K.V p9_debug(P9_DEBUG_VFS, 630b6054793SAneesh Kumar K.V "p9_client_walk failed %d\n", err); 631bd238fb4SLatchesar Ionkov goto error; 6326d27e64dSVenkateswararao Jujjuri } 633b6054793SAneesh Kumar K.V /* 634b6054793SAneesh Kumar K.V * instantiate inode and assign the unopened fid to the dentry 635b6054793SAneesh Kumar K.V */ 636ed80fcfaSAneesh Kumar K.V inode = v9fs_get_new_inode_from_fid(v9ses, fid, dir->i_sb); 637bd238fb4SLatchesar Ionkov if (IS_ERR(inode)) { 638bd238fb4SLatchesar Ionkov err = PTR_ERR(inode); 639b6054793SAneesh Kumar K.V p9_debug(P9_DEBUG_VFS, 640b6054793SAneesh Kumar K.V "inode creation failed %d\n", err); 641bd238fb4SLatchesar Ionkov goto error; 642bd238fb4SLatchesar Ionkov } 643dafbe689SDominique Martinet v9fs_fid_add(dentry, &fid); 6445441ae5eSAneesh Kumar K.V d_instantiate(dentry, inode); 645b6054793SAneesh Kumar K.V } 646b48dbb99SDominique Martinet p9_fid_put(dfid); 647bd238fb4SLatchesar Ionkov return ofid; 648bd238fb4SLatchesar Ionkov error: 649dafbe689SDominique Martinet p9_fid_put(dfid); 650b48dbb99SDominique Martinet p9_fid_put(ofid); 651b48dbb99SDominique Martinet p9_fid_put(fid); 652bd238fb4SLatchesar Ionkov return ERR_PTR(err); 653bd238fb4SLatchesar Ionkov } 654bd238fb4SLatchesar Ionkov 6552bad8471SEric Van Hensbergen /** 656e43ae79cSMiklos Szeredi * v9fs_vfs_create - VFS hook to create a regular file 6576c960e68SChristian Brauner * @idmap: idmap of the mount 658bc868036SDavid Howells * @dir: The parent directory 659bc868036SDavid Howells * @dentry: The name of file to be created 660bc868036SDavid Howells * @mode: The UNIX file mode to set 661bc868036SDavid Howells * @excl: True if the file must not yet exist 662e43ae79cSMiklos Szeredi * 663e43ae79cSMiklos Szeredi * open(.., O_CREAT) is handled in v9fs_vfs_atomic_open(). This is only called 664e43ae79cSMiklos Szeredi * for mknod(2). 665e43ae79cSMiklos Szeredi * 6662bad8471SEric Van Hensbergen */ 6672bad8471SEric Van Hensbergen 6682bad8471SEric Van Hensbergen static int 6696c960e68SChristian Brauner v9fs_vfs_create(struct mnt_idmap *idmap, struct inode *dir, 670549c7297SChristian Brauner struct dentry *dentry, umode_t mode, bool excl) 6712bad8471SEric Van Hensbergen { 672e43ae79cSMiklos Szeredi struct v9fs_session_info *v9ses = v9fs_inode2v9ses(dir); 673e43ae79cSMiklos Szeredi u32 perm = unixmode2p9mode(v9ses, mode); 674e43ae79cSMiklos Szeredi struct p9_fid *fid; 6756a3124a3SLatchesar Ionkov 676e43ae79cSMiklos Szeredi /* P9_OEXCL? */ 677e43ae79cSMiklos Szeredi fid = v9fs_create(v9ses, dir, dentry, NULL, perm, P9_ORDWR); 678e43ae79cSMiklos Szeredi if (IS_ERR(fid)) 679e43ae79cSMiklos Szeredi return PTR_ERR(fid); 6806a3124a3SLatchesar Ionkov 681d28c61f0SAneesh Kumar K.V v9fs_invalidate_inode_attr(dir); 682b48dbb99SDominique Martinet p9_fid_put(fid); 6836a3124a3SLatchesar Ionkov 6846a3124a3SLatchesar Ionkov return 0; 6852bad8471SEric Van Hensbergen } 6862bad8471SEric Van Hensbergen 6872bad8471SEric Van Hensbergen /** 6882bad8471SEric Van Hensbergen * v9fs_vfs_mkdir - VFS mkdir hook to create a directory 689c54bd91eSChristian Brauner * @idmap: idmap of the mount 690ee443996SEric Van Hensbergen * @dir: inode that is being unlinked 6912bad8471SEric Van Hensbergen * @dentry: dentry that is being unlinked 6922bad8471SEric Van Hensbergen * @mode: mode for new directory 6932bad8471SEric Van Hensbergen * 6942bad8471SEric Van Hensbergen */ 6952bad8471SEric Van Hensbergen 696c54bd91eSChristian Brauner static int v9fs_vfs_mkdir(struct mnt_idmap *idmap, struct inode *dir, 697549c7297SChristian Brauner struct dentry *dentry, umode_t mode) 6982bad8471SEric Van Hensbergen { 6996a3124a3SLatchesar Ionkov int err; 700bd238fb4SLatchesar Ionkov u32 perm; 701bd238fb4SLatchesar Ionkov struct p9_fid *fid; 702d28c61f0SAneesh Kumar K.V struct v9fs_session_info *v9ses; 7036a3124a3SLatchesar Ionkov 7044b8e9923SAl Viro p9_debug(P9_DEBUG_VFS, "name %pd\n", dentry); 705bd238fb4SLatchesar Ionkov err = 0; 7066a3124a3SLatchesar Ionkov v9ses = v9fs_inode2v9ses(dir); 7076a3124a3SLatchesar Ionkov perm = unixmode2p9mode(v9ses, mode | S_IFDIR); 708bd238fb4SLatchesar Ionkov fid = v9fs_create(v9ses, dir, dentry, NULL, perm, P9_OREAD); 709bd238fb4SLatchesar Ionkov if (IS_ERR(fid)) { 710bd238fb4SLatchesar Ionkov err = PTR_ERR(fid); 711bd238fb4SLatchesar Ionkov fid = NULL; 712d28c61f0SAneesh Kumar K.V } else { 713b271ec47SAneesh Kumar K.V inc_nlink(dir); 714d28c61f0SAneesh Kumar K.V v9fs_invalidate_inode_attr(dir); 715d28c61f0SAneesh Kumar K.V } 7166a3124a3SLatchesar Ionkov 717bd238fb4SLatchesar Ionkov if (fid) 718b48dbb99SDominique Martinet p9_fid_put(fid); 7196a3124a3SLatchesar Ionkov 7206a3124a3SLatchesar Ionkov return err; 7212bad8471SEric Van Hensbergen } 7222bad8471SEric Van Hensbergen 7232bad8471SEric Van Hensbergen /** 7242bad8471SEric Van Hensbergen * v9fs_vfs_lookup - VFS lookup hook to "walk" to a new inode 7252bad8471SEric Van Hensbergen * @dir: inode that is being walked from 7262bad8471SEric Van Hensbergen * @dentry: dentry that is being walked to? 727fd2916bdSFabian Frederick * @flags: lookup flags (unused) 7282bad8471SEric Van Hensbergen * 7292bad8471SEric Van Hensbergen */ 7302bad8471SEric Van Hensbergen 73153c06f4eSAneesh Kumar K.V struct dentry *v9fs_vfs_lookup(struct inode *dir, struct dentry *dentry, 73200cd8dd3SAl Viro unsigned int flags) 7332bad8471SEric Van Hensbergen { 73473f50717SAneesh Kumar K.V struct dentry *res; 7352bad8471SEric Van Hensbergen struct v9fs_session_info *v9ses; 736bd238fb4SLatchesar Ionkov struct p9_fid *dfid, *fid; 7372bad8471SEric Van Hensbergen struct inode *inode; 7387880b43bSAl Viro const unsigned char *name; 7392bad8471SEric Van Hensbergen 7404b8e9923SAl Viro p9_debug(P9_DEBUG_VFS, "dir: %p dentry: (%pd) %p flags: %x\n", 7414b8e9923SAl Viro dir, dentry, dentry, flags); 7422bad8471SEric Van Hensbergen 74311e9b49bSSripathi Kodi if (dentry->d_name.len > NAME_MAX) 74411e9b49bSSripathi Kodi return ERR_PTR(-ENAMETOOLONG); 74511e9b49bSSripathi Kodi 7462bad8471SEric Van Hensbergen v9ses = v9fs_inode2v9ses(dir); 747a534c8d1SAneesh Kumar K.V /* We can walk d_parent because we hold the dir->i_mutex */ 74877d5a6b7SAl Viro dfid = v9fs_parent_fid(dentry); 749bd238fb4SLatchesar Ionkov if (IS_ERR(dfid)) 750e231c2eeSDavid Howells return ERR_CAST(dfid); 7512bad8471SEric Van Hensbergen 75273f50717SAneesh Kumar K.V /* 75373f50717SAneesh Kumar K.V * Make sure we don't use a wrong inode due to parallel 75473f50717SAneesh Kumar K.V * unlink. For cached mode create calls request for new 75573f50717SAneesh Kumar K.V * inode. But with cache disabled, lookup should do this. 75673f50717SAneesh Kumar K.V */ 757500e2ab6SAl Viro name = dentry->d_name.name; 758500e2ab6SAl Viro fid = p9_client_walk(dfid, 1, &name, 1); 759b48dbb99SDominique Martinet p9_fid_put(dfid); 760500e2ab6SAl Viro if (fid == ERR_PTR(-ENOENT)) 761500e2ab6SAl Viro inode = NULL; 762500e2ab6SAl Viro else if (IS_ERR(fid)) 763500e2ab6SAl Viro inode = ERR_CAST(fid); 764500e2ab6SAl Viro else if (v9ses->cache == CACHE_LOOSE || v9ses->cache == CACHE_FSCACHE) 765a78ce05dSAneesh Kumar K.V inode = v9fs_get_inode_from_fid(v9ses, fid, dir->i_sb); 76673f50717SAneesh Kumar K.V else 76773f50717SAneesh Kumar K.V inode = v9fs_get_new_inode_from_fid(v9ses, fid, dir->i_sb); 76873f50717SAneesh Kumar K.V /* 76973f50717SAneesh Kumar K.V * If we had a rename on the server and a parallel lookup 77073f50717SAneesh Kumar K.V * for the new name, then make sure we instantiate with 77173f50717SAneesh Kumar K.V * the new name. ie look up for a/b, while on server somebody 77273f50717SAneesh Kumar K.V * moved b under k and client parallely did a lookup for 77373f50717SAneesh Kumar K.V * k/b. 77473f50717SAneesh Kumar K.V */ 77541d28bcaSAl Viro res = d_splice_alias(inode, dentry); 776500e2ab6SAl Viro if (!IS_ERR(fid)) { 777a3b2157eSAl Viro if (!res) 778dafbe689SDominique Martinet v9fs_fid_add(dentry, &fid); 779a3b2157eSAl Viro else if (!IS_ERR(res)) 780dafbe689SDominique Martinet v9fs_fid_add(res, &fid); 781a3b2157eSAl Viro else 782b48dbb99SDominique Martinet p9_fid_put(fid); 783500e2ab6SAl Viro } 7847b5be621SAl Viro return res; 7852bad8471SEric Van Hensbergen } 7862bad8471SEric Van Hensbergen 787d9585277SAl Viro static int 788e43ae79cSMiklos Szeredi v9fs_vfs_atomic_open(struct inode *dir, struct dentry *dentry, 7896e195b0fSDominique Martinet struct file *file, unsigned int flags, umode_t mode) 790e43ae79cSMiklos Szeredi { 791e43ae79cSMiklos Szeredi int err; 792e43ae79cSMiklos Szeredi u32 perm; 793e43ae79cSMiklos Szeredi struct v9fs_inode *v9inode; 794e43ae79cSMiklos Szeredi struct v9fs_session_info *v9ses; 795*1543b4c5SEric Van Hensbergen struct p9_fid *fid; 796e43ae79cSMiklos Szeredi struct dentry *res = NULL; 797987a6485SGreg Kurz struct inode *inode; 798*1543b4c5SEric Van Hensbergen int p9_omode; 799e43ae79cSMiklos Szeredi 80000699ad8SAl Viro if (d_in_lookup(dentry)) { 80100cd8dd3SAl Viro res = v9fs_vfs_lookup(dir, dentry, 0); 802e43ae79cSMiklos Szeredi if (IS_ERR(res)) 803d9585277SAl Viro return PTR_ERR(res); 804e43ae79cSMiklos Szeredi 805e43ae79cSMiklos Szeredi if (res) 806e43ae79cSMiklos Szeredi dentry = res; 807e43ae79cSMiklos Szeredi } 808e43ae79cSMiklos Szeredi 809e43ae79cSMiklos Szeredi /* Only creates */ 8102b0143b5SDavid Howells if (!(flags & O_CREAT) || d_really_is_positive(dentry)) 811e45198a6SAl Viro return finish_no_open(file, res); 812e43ae79cSMiklos Szeredi 813e43ae79cSMiklos Szeredi err = 0; 814fae74696SGeyslan G. Bem 815e43ae79cSMiklos Szeredi v9ses = v9fs_inode2v9ses(dir); 816e43ae79cSMiklos Szeredi perm = unixmode2p9mode(v9ses, mode); 817*1543b4c5SEric Van Hensbergen p9_omode = v9fs_uflags2omode(flags, v9fs_proto_dotu(v9ses)); 818*1543b4c5SEric Van Hensbergen 819*1543b4c5SEric Van Hensbergen if ((v9ses->cache >= CACHE_WRITEBACK) && (p9_omode & P9_OWRITE)) { 820*1543b4c5SEric Van Hensbergen p9_omode = (p9_omode & !P9_OWRITE) | P9_ORDWR; 821*1543b4c5SEric Van Hensbergen p9_debug(P9_DEBUG_CACHE, 822*1543b4c5SEric Van Hensbergen "write-only file with writeback enabled, creating w/ O_RDWR\n"); 823*1543b4c5SEric Van Hensbergen } 824*1543b4c5SEric Van Hensbergen fid = v9fs_create(v9ses, dir, dentry, NULL, perm, p9_omode); 825e43ae79cSMiklos Szeredi if (IS_ERR(fid)) { 826e43ae79cSMiklos Szeredi err = PTR_ERR(fid); 827e43ae79cSMiklos Szeredi goto error; 828e43ae79cSMiklos Szeredi } 829e43ae79cSMiklos Szeredi 830e43ae79cSMiklos Szeredi v9fs_invalidate_inode_attr(dir); 831987a6485SGreg Kurz inode = d_inode(dentry); 832987a6485SGreg Kurz v9inode = V9FS_I(inode); 833be12af3eSAl Viro err = finish_open(file, dentry, generic_file_open); 83430d90494SAl Viro if (err) 835e43ae79cSMiklos Szeredi goto error; 836e43ae79cSMiklos Szeredi 83730d90494SAl Viro file->private_data = fid; 838fb89b45cSDominique Martinet if (v9ses->cache == CACHE_LOOSE || v9ses->cache == CACHE_FSCACHE) 83924e42e32SDavid Howells fscache_use_cookie(v9fs_inode_cookie(v9inode), 84024e42e32SDavid Howells file->f_mode & FMODE_WRITE); 841*1543b4c5SEric Van Hensbergen 842*1543b4c5SEric Van Hensbergen v9fs_fid_add_modes(fid, v9ses->flags, v9ses->cache, file->f_flags); 843dafbe689SDominique Martinet v9fs_open_fid_add(inode, &fid); 844e43ae79cSMiklos Szeredi 84573a09dd9SAl Viro file->f_mode |= FMODE_CREATED; 846e43ae79cSMiklos Szeredi out: 847e43ae79cSMiklos Szeredi dput(res); 848d9585277SAl Viro return err; 849e43ae79cSMiklos Szeredi 850e43ae79cSMiklos Szeredi error: 851b48dbb99SDominique Martinet p9_fid_put(fid); 852e43ae79cSMiklos Szeredi goto out; 853e43ae79cSMiklos Szeredi } 854e43ae79cSMiklos Szeredi 8552bad8471SEric Van Hensbergen /** 8562bad8471SEric Van Hensbergen * v9fs_vfs_unlink - VFS unlink hook to delete an inode 8572bad8471SEric Van Hensbergen * @i: inode that is being unlinked 85873c592b9SEric Van Hensbergen * @d: dentry that is being unlinked 8592bad8471SEric Van Hensbergen * 8602bad8471SEric Van Hensbergen */ 8612bad8471SEric Van Hensbergen 86253c06f4eSAneesh Kumar K.V int v9fs_vfs_unlink(struct inode *i, struct dentry *d) 8632bad8471SEric Van Hensbergen { 8642bad8471SEric Van Hensbergen return v9fs_remove(i, d, 0); 8652bad8471SEric Van Hensbergen } 8662bad8471SEric Van Hensbergen 8672bad8471SEric Van Hensbergen /** 8682bad8471SEric Van Hensbergen * v9fs_vfs_rmdir - VFS unlink hook to delete a directory 8692bad8471SEric Van Hensbergen * @i: inode that is being unlinked 87073c592b9SEric Van Hensbergen * @d: dentry that is being unlinked 8712bad8471SEric Van Hensbergen * 8722bad8471SEric Van Hensbergen */ 8732bad8471SEric Van Hensbergen 87453c06f4eSAneesh Kumar K.V int v9fs_vfs_rmdir(struct inode *i, struct dentry *d) 8752bad8471SEric Van Hensbergen { 87648e370ffSAneesh Kumar K.V return v9fs_remove(i, d, AT_REMOVEDIR); 8772bad8471SEric Van Hensbergen } 8782bad8471SEric Van Hensbergen 8792bad8471SEric Van Hensbergen /** 8802bad8471SEric Van Hensbergen * v9fs_vfs_rename - VFS hook to rename an inode 881e18275aeSChristian Brauner * @idmap: The idmap of the mount 8822bad8471SEric Van Hensbergen * @old_dir: old dir inode 8832bad8471SEric Van Hensbergen * @old_dentry: old dentry 8842bad8471SEric Van Hensbergen * @new_dir: new dir inode 8852bad8471SEric Van Hensbergen * @new_dentry: new dentry 886bc868036SDavid Howells * @flags: RENAME_* flags 8872bad8471SEric Van Hensbergen * 8882bad8471SEric Van Hensbergen */ 8892bad8471SEric Van Hensbergen 89053c06f4eSAneesh Kumar K.V int 891e18275aeSChristian Brauner v9fs_vfs_rename(struct mnt_idmap *idmap, struct inode *old_dir, 892549c7297SChristian Brauner struct dentry *old_dentry, struct inode *new_dir, 893549c7297SChristian Brauner struct dentry *new_dentry, unsigned int flags) 8942bad8471SEric Van Hensbergen { 895d28c61f0SAneesh Kumar K.V int retval; 896bd238fb4SLatchesar Ionkov struct inode *old_inode; 897b271ec47SAneesh Kumar K.V struct inode *new_inode; 898bd238fb4SLatchesar Ionkov struct v9fs_session_info *v9ses; 899dafbe689SDominique Martinet struct p9_fid *oldfid = NULL, *dfid = NULL; 900dafbe689SDominique Martinet struct p9_fid *olddirfid = NULL; 901dafbe689SDominique Martinet struct p9_fid *newdirfid = NULL; 902bd238fb4SLatchesar Ionkov struct p9_wstat wstat; 9032bad8471SEric Van Hensbergen 9041cd66c93SMiklos Szeredi if (flags) 9051cd66c93SMiklos Szeredi return -EINVAL; 9061cd66c93SMiklos Szeredi 9075d385153SJoe Perches p9_debug(P9_DEBUG_VFS, "\n"); 908bd238fb4SLatchesar Ionkov retval = 0; 9092b0143b5SDavid Howells old_inode = d_inode(old_dentry); 9102b0143b5SDavid Howells new_inode = d_inode(new_dentry); 911bd238fb4SLatchesar Ionkov v9ses = v9fs_inode2v9ses(old_inode); 912bd238fb4SLatchesar Ionkov oldfid = v9fs_fid_lookup(old_dentry); 913da977b2cSEric Van Hensbergen if (IS_ERR(oldfid)) 914da977b2cSEric Van Hensbergen return PTR_ERR(oldfid); 915da977b2cSEric Van Hensbergen 9166636b6dcSJianyong Wu dfid = v9fs_parent_fid(old_dentry); 9176636b6dcSJianyong Wu olddirfid = clone_fid(dfid); 918b48dbb99SDominique Martinet p9_fid_put(dfid); 919dafbe689SDominique Martinet dfid = NULL; 9206636b6dcSJianyong Wu 921da977b2cSEric Van Hensbergen if (IS_ERR(olddirfid)) { 922da977b2cSEric Van Hensbergen retval = PTR_ERR(olddirfid); 923dafbe689SDominique Martinet goto error; 924da977b2cSEric Van Hensbergen } 925da977b2cSEric Van Hensbergen 9266636b6dcSJianyong Wu dfid = v9fs_parent_fid(new_dentry); 9276636b6dcSJianyong Wu newdirfid = clone_fid(dfid); 928b48dbb99SDominique Martinet p9_fid_put(dfid); 929dafbe689SDominique Martinet dfid = NULL; 9306636b6dcSJianyong Wu 931da977b2cSEric Van Hensbergen if (IS_ERR(newdirfid)) { 932da977b2cSEric Van Hensbergen retval = PTR_ERR(newdirfid); 933dafbe689SDominique Martinet goto error; 9342bad8471SEric Van Hensbergen } 9352bad8471SEric Van Hensbergen 936a534c8d1SAneesh Kumar K.V down_write(&v9ses->rename_sem); 9374681dbdaSSripathi Kodi if (v9fs_proto_dotl(v9ses)) { 9389e8fb38eSAneesh Kumar K.V retval = p9_client_renameat(olddirfid, old_dentry->d_name.name, 9399e8fb38eSAneesh Kumar K.V newdirfid, new_dentry->d_name.name); 9409e8fb38eSAneesh Kumar K.V if (retval == -EOPNOTSUPP) 9414681dbdaSSripathi Kodi retval = p9_client_rename(oldfid, newdirfid, 9429e8fb38eSAneesh Kumar K.V new_dentry->d_name.name); 9439e8fb38eSAneesh Kumar K.V if (retval != -EOPNOTSUPP) 944dafbe689SDominique Martinet goto error_locked; 9454681dbdaSSripathi Kodi } 946a534c8d1SAneesh Kumar K.V if (old_dentry->d_parent != new_dentry->d_parent) { 947a534c8d1SAneesh Kumar K.V /* 948a534c8d1SAneesh Kumar K.V * 9P .u can only handle file rename in the same directory 949a534c8d1SAneesh Kumar K.V */ 9504681dbdaSSripathi Kodi 9515d385153SJoe Perches p9_debug(P9_DEBUG_ERROR, "old dir and new dir are different\n"); 952621997cdSEric Van Hensbergen retval = -EXDEV; 953dafbe689SDominique Martinet goto error_locked; 9542bad8471SEric Van Hensbergen } 955531b1094SLatchesar Ionkov v9fs_blank_wstat(&wstat); 956ba17674fSLatchesar Ionkov wstat.muid = v9ses->uname; 9577880b43bSAl Viro wstat.name = new_dentry->d_name.name; 958bd238fb4SLatchesar Ionkov retval = p9_client_wstat(oldfid, &wstat); 9592bad8471SEric Van Hensbergen 960dafbe689SDominique Martinet error_locked: 961b271ec47SAneesh Kumar K.V if (!retval) { 962b271ec47SAneesh Kumar K.V if (new_inode) { 963b271ec47SAneesh Kumar K.V if (S_ISDIR(new_inode->i_mode)) 964b271ec47SAneesh Kumar K.V clear_nlink(new_inode); 965b271ec47SAneesh Kumar K.V else 966ac89b2efSEryu Guan v9fs_dec_count(new_inode); 967b271ec47SAneesh Kumar K.V } 968b271ec47SAneesh Kumar K.V if (S_ISDIR(old_inode->i_mode)) { 969b271ec47SAneesh Kumar K.V if (!new_inode) 970b271ec47SAneesh Kumar K.V inc_nlink(new_dir); 971ac89b2efSEryu Guan v9fs_dec_count(old_dir); 972b271ec47SAneesh Kumar K.V } 9733bc86de3SAneesh Kumar K.V v9fs_invalidate_inode_attr(old_inode); 974d28c61f0SAneesh Kumar K.V v9fs_invalidate_inode_attr(old_dir); 975d28c61f0SAneesh Kumar K.V v9fs_invalidate_inode_attr(new_dir); 9763bc86de3SAneesh Kumar K.V 977a534c8d1SAneesh Kumar K.V /* successful rename */ 978a534c8d1SAneesh Kumar K.V d_move(old_dentry, new_dentry); 979b271ec47SAneesh Kumar K.V } 980a534c8d1SAneesh Kumar K.V up_write(&v9ses->rename_sem); 981dafbe689SDominique Martinet 982dafbe689SDominique Martinet error: 983b48dbb99SDominique Martinet p9_fid_put(newdirfid); 984b48dbb99SDominique Martinet p9_fid_put(olddirfid); 985b48dbb99SDominique Martinet p9_fid_put(oldfid); 9862bad8471SEric Van Hensbergen return retval; 9872bad8471SEric Van Hensbergen } 9882bad8471SEric Van Hensbergen 9892bad8471SEric Van Hensbergen /** 990943ffb58SAdrian Bunk * v9fs_vfs_getattr - retrieve file metadata 991b74d24f7SChristian Brauner * @idmap: idmap of the mount 992a528d35eSDavid Howells * @path: Object to query 993ee443996SEric Van Hensbergen * @stat: metadata structure to populate 994a528d35eSDavid Howells * @request_mask: Mask of STATX_xxx flags indicating the caller's interests 995a528d35eSDavid Howells * @flags: AT_STATX_xxx setting 9962bad8471SEric Van Hensbergen * 9972bad8471SEric Van Hensbergen */ 9982bad8471SEric Van Hensbergen 9992bad8471SEric Van Hensbergen static int 1000b74d24f7SChristian Brauner v9fs_vfs_getattr(struct mnt_idmap *idmap, const struct path *path, 1001549c7297SChristian Brauner struct kstat *stat, u32 request_mask, unsigned int flags) 10022bad8471SEric Van Hensbergen { 1003a528d35eSDavid Howells struct dentry *dentry = path->dentry; 1004d9bc0d11SEric Van Hensbergen struct inode *inode = d_inode(dentry); 1005bd238fb4SLatchesar Ionkov struct v9fs_session_info *v9ses; 1006bd238fb4SLatchesar Ionkov struct p9_fid *fid; 100751a87c55SEric Van Hensbergen struct p9_wstat *st; 10082bad8471SEric Van Hensbergen 10095d385153SJoe Perches p9_debug(P9_DEBUG_VFS, "dentry: %p\n", dentry); 101042869c8aSAneesh Kumar K.V v9ses = v9fs_dentry2v9ses(dentry); 1011a1211908SAneesh Kumar K.V if (v9ses->cache == CACHE_LOOSE || v9ses->cache == CACHE_FSCACHE) { 1012*1543b4c5SEric Van Hensbergen generic_fillattr(&nop_mnt_idmap, inode, stat); 1013a1211908SAneesh Kumar K.V return 0; 1014d9bc0d11SEric Van Hensbergen } else if (v9ses->cache >= CACHE_WRITEBACK) { 1015d9bc0d11SEric Van Hensbergen if (S_ISREG(inode->i_mode)) { 1016d9bc0d11SEric Van Hensbergen int retval = filemap_fdatawrite(inode->i_mapping); 1017d9bc0d11SEric Van Hensbergen 1018d9bc0d11SEric Van Hensbergen if (retval) 1019d9bc0d11SEric Van Hensbergen p9_debug(P9_DEBUG_ERROR, 1020d9bc0d11SEric Van Hensbergen "flushing writeback during getattr returned %d\n", retval); 1021d9bc0d11SEric Van Hensbergen } 1022a1211908SAneesh Kumar K.V } 1023bd238fb4SLatchesar Ionkov fid = v9fs_fid_lookup(dentry); 1024da977b2cSEric Van Hensbergen if (IS_ERR(fid)) 1025da977b2cSEric Van Hensbergen return PTR_ERR(fid); 10262bad8471SEric Van Hensbergen 1027bd238fb4SLatchesar Ionkov st = p9_client_stat(fid); 1028b48dbb99SDominique Martinet p9_fid_put(fid); 1029bd238fb4SLatchesar Ionkov if (IS_ERR(st)) 1030bd238fb4SLatchesar Ionkov return PTR_ERR(st); 10312bad8471SEric Van Hensbergen 10325e3cc1eeSHou Tao v9fs_stat2inode(st, d_inode(dentry), dentry->d_sb, 0); 1033b74d24f7SChristian Brauner generic_fillattr(&nop_mnt_idmap, d_inode(dentry), stat); 10342bad8471SEric Van Hensbergen 103562b2be59SLatchesar Ionkov p9stat_free(st); 1036bd238fb4SLatchesar Ionkov kfree(st); 1037bd238fb4SLatchesar Ionkov return 0; 10382bad8471SEric Van Hensbergen } 10392bad8471SEric Van Hensbergen 10402bad8471SEric Van Hensbergen /** 10412bad8471SEric Van Hensbergen * v9fs_vfs_setattr - set file metadata 1042c1632a0fSChristian Brauner * @idmap: idmap of the mount 10432bad8471SEric Van Hensbergen * @dentry: file whose metadata to set 10442bad8471SEric Van Hensbergen * @iattr: metadata assignment structure 10452bad8471SEric Van Hensbergen * 10462bad8471SEric Van Hensbergen */ 10472bad8471SEric Van Hensbergen 1048c1632a0fSChristian Brauner static int v9fs_vfs_setattr(struct mnt_idmap *idmap, 1049549c7297SChristian Brauner struct dentry *dentry, struct iattr *iattr) 10502bad8471SEric Van Hensbergen { 10516636b6dcSJianyong Wu int retval, use_dentry = 0; 105224e42e32SDavid Howells struct inode *inode = d_inode(dentry); 105324e42e32SDavid Howells struct v9fs_inode *v9inode = V9FS_I(inode); 1054bd238fb4SLatchesar Ionkov struct v9fs_session_info *v9ses; 105566246641SJianyong Wu struct p9_fid *fid = NULL; 1056bd238fb4SLatchesar Ionkov struct p9_wstat wstat; 10572bad8471SEric Van Hensbergen 10585d385153SJoe Perches p9_debug(P9_DEBUG_VFS, "\n"); 1059c1632a0fSChristian Brauner retval = setattr_prepare(&nop_mnt_idmap, dentry, iattr); 1060059c138bSAneesh Kumar K.V if (retval) 1061059c138bSAneesh Kumar K.V return retval; 1062059c138bSAneesh Kumar K.V 1063bd238fb4SLatchesar Ionkov retval = -EPERM; 106442869c8aSAneesh Kumar K.V v9ses = v9fs_dentry2v9ses(dentry); 106566246641SJianyong Wu if (iattr->ia_valid & ATTR_FILE) { 106666246641SJianyong Wu fid = iattr->ia_file->private_data; 106766246641SJianyong Wu WARN_ON(!fid); 106866246641SJianyong Wu } 10696636b6dcSJianyong Wu if (!fid) { 1070bd238fb4SLatchesar Ionkov fid = v9fs_fid_lookup(dentry); 10716636b6dcSJianyong Wu use_dentry = 1; 10726636b6dcSJianyong Wu } 1073da977b2cSEric Van Hensbergen if (IS_ERR(fid)) 1074da977b2cSEric Van Hensbergen return PTR_ERR(fid); 10752bad8471SEric Van Hensbergen 1076531b1094SLatchesar Ionkov v9fs_blank_wstat(&wstat); 10772bad8471SEric Van Hensbergen if (iattr->ia_valid & ATTR_MODE) 1078531b1094SLatchesar Ionkov wstat.mode = unixmode2p9mode(v9ses, iattr->ia_mode); 10792bad8471SEric Van Hensbergen 10802bad8471SEric Van Hensbergen if (iattr->ia_valid & ATTR_MTIME) 1081531b1094SLatchesar Ionkov wstat.mtime = iattr->ia_mtime.tv_sec; 10822bad8471SEric Van Hensbergen 10832bad8471SEric Van Hensbergen if (iattr->ia_valid & ATTR_ATIME) 1084531b1094SLatchesar Ionkov wstat.atime = iattr->ia_atime.tv_sec; 10852bad8471SEric Van Hensbergen 10862bad8471SEric Van Hensbergen if (iattr->ia_valid & ATTR_SIZE) 1087531b1094SLatchesar Ionkov wstat.length = iattr->ia_size; 10882bad8471SEric Van Hensbergen 1089dd6102fbSSripathi Kodi if (v9fs_proto_dotu(v9ses)) { 1090531b1094SLatchesar Ionkov if (iattr->ia_valid & ATTR_UID) 1091531b1094SLatchesar Ionkov wstat.n_uid = iattr->ia_uid; 10922bad8471SEric Van Hensbergen 1093531b1094SLatchesar Ionkov if (iattr->ia_valid & ATTR_GID) 1094531b1094SLatchesar Ionkov wstat.n_gid = iattr->ia_gid; 10952bad8471SEric Van Hensbergen } 1096059c138bSAneesh Kumar K.V 10973dc5436aSAneesh Kumar K.V /* Write all dirty data */ 1098d9bc0d11SEric Van Hensbergen if (d_is_reg(dentry)) { 1099d9bc0d11SEric Van Hensbergen retval = filemap_fdatawrite(inode->i_mapping); 1100d9bc0d11SEric Van Hensbergen if (retval) 1101d9bc0d11SEric Van Hensbergen p9_debug(P9_DEBUG_ERROR, 1102d9bc0d11SEric Van Hensbergen "flushing writeback during setattr returned %d\n", retval); 1103d9bc0d11SEric Van Hensbergen } 11043dc5436aSAneesh Kumar K.V 1105f10fc50fSAneesh Kumar K.V retval = p9_client_wstat(fid, &wstat); 11066636b6dcSJianyong Wu 11076636b6dcSJianyong Wu if (use_dentry) 1108b48dbb99SDominique Martinet p9_fid_put(fid); 11096636b6dcSJianyong Wu 1110f10fc50fSAneesh Kumar K.V if (retval < 0) 1111f10fc50fSAneesh Kumar K.V return retval; 1112059c138bSAneesh Kumar K.V 1113059c138bSAneesh Kumar K.V if ((iattr->ia_valid & ATTR_SIZE) && 111424e42e32SDavid Howells iattr->ia_size != i_size_read(inode)) { 111524e42e32SDavid Howells truncate_setsize(inode, iattr->ia_size); 1116*1543b4c5SEric Van Hensbergen truncate_pagecache(inode, iattr->ia_size); 1117*1543b4c5SEric Van Hensbergen 1118d9bc0d11SEric Van Hensbergen if (v9ses->cache == CACHE_FSCACHE) 111924e42e32SDavid Howells fscache_resize_cookie(v9fs_inode_cookie(v9inode), iattr->ia_size); 112024e42e32SDavid Howells } 1121059c138bSAneesh Kumar K.V 112224e42e32SDavid Howells v9fs_invalidate_inode_attr(inode); 11231025774cSChristoph Hellwig 1124c1632a0fSChristian Brauner setattr_copy(&nop_mnt_idmap, inode, iattr); 112524e42e32SDavid Howells mark_inode_dirty(inode); 11261025774cSChristoph Hellwig return 0; 11272bad8471SEric Van Hensbergen } 11282bad8471SEric Van Hensbergen 11292bad8471SEric Van Hensbergen /** 1130531b1094SLatchesar Ionkov * v9fs_stat2inode - populate an inode structure with mistat info 1131531b1094SLatchesar Ionkov * @stat: Plan 9 metadata (mistat) structure 11322bad8471SEric Van Hensbergen * @inode: inode to populate 11332bad8471SEric Van Hensbergen * @sb: superblock of filesystem 11345e3cc1eeSHou Tao * @flags: control flags (e.g. V9FS_STAT2INODE_KEEP_ISIZE) 11352bad8471SEric Van Hensbergen * 11362bad8471SEric Van Hensbergen */ 11372bad8471SEric Van Hensbergen 11382bad8471SEric Van Hensbergen void 113951a87c55SEric Van Hensbergen v9fs_stat2inode(struct p9_wstat *stat, struct inode *inode, 11405e3cc1eeSHou Tao struct super_block *sb, unsigned int flags) 11412bad8471SEric Van Hensbergen { 11423eda0de6SAl Viro umode_t mode; 11432bad8471SEric Van Hensbergen struct v9fs_session_info *v9ses = sb->s_fs_info; 1144b3cbea03SAneesh Kumar K.V struct v9fs_inode *v9inode = V9FS_I(inode); 11452bad8471SEric Van Hensbergen 1146bfe86848SMiklos Szeredi set_nlink(inode, 1); 11472bad8471SEric Van Hensbergen 1148531b1094SLatchesar Ionkov inode->i_atime.tv_sec = stat->atime; 1149531b1094SLatchesar Ionkov inode->i_mtime.tv_sec = stat->mtime; 1150531b1094SLatchesar Ionkov inode->i_ctime.tv_sec = stat->mtime; 11512bad8471SEric Van Hensbergen 1152bd32b82dSLatchesar Ionkov inode->i_uid = v9ses->dfltuid; 1153bd32b82dSLatchesar Ionkov inode->i_gid = v9ses->dfltgid; 11542bad8471SEric Van Hensbergen 1155dd6102fbSSripathi Kodi if (v9fs_proto_dotu(v9ses)) { 1156531b1094SLatchesar Ionkov inode->i_uid = stat->n_uid; 1157531b1094SLatchesar Ionkov inode->i_gid = stat->n_gid; 1158531b1094SLatchesar Ionkov } 11595717144aSAneesh Kumar K.V if ((S_ISREG(inode->i_mode)) || (S_ISDIR(inode->i_mode))) { 11609652c732SAl Viro if (v9fs_proto_dotu(v9ses)) { 11619652c732SAl Viro unsigned int i_nlink; 11625717144aSAneesh Kumar K.V /* 11639652c732SAl Viro * Hadlink support got added later to the .u extension. 11649652c732SAl Viro * So there can be a server out there that doesn't 11659652c732SAl Viro * support this even with .u extension. That would 11669652c732SAl Viro * just leave us with stat->extension being an empty 11679652c732SAl Viro * string, though. 11685717144aSAneesh Kumar K.V */ 11695717144aSAneesh Kumar K.V /* HARDLINKCOUNT %u */ 11709652c732SAl Viro if (sscanf(stat->extension, 11719652c732SAl Viro " HARDLINKCOUNT %u", &i_nlink) == 1) 1172bfe86848SMiklos Szeredi set_nlink(inode, i_nlink); 11735717144aSAneesh Kumar K.V } 11745717144aSAneesh Kumar K.V } 1175df345c67SAneesh Kumar K.V mode = p9mode2perm(v9ses, stat); 117645089142SAneesh Kumar K.V mode |= inode->i_mode & ~S_IALLUGO; 117745089142SAneesh Kumar K.V inode->i_mode = mode; 11782bad8471SEric Van Hensbergen 11795e3cc1eeSHou Tao if (!(flags & V9FS_STAT2INODE_KEEP_ISIZE)) 11805e3cc1eeSHou Tao v9fs_i_size_write(inode, stat->length); 1181bd238fb4SLatchesar Ionkov /* not real number of blocks, but 512 byte ones ... */ 11825e3cc1eeSHou Tao inode->i_blocks = (stat->length + 512 - 1) >> 9; 1183b3cbea03SAneesh Kumar K.V v9inode->cache_validity &= ~V9FS_INO_INVALID_ATTR; 11842bad8471SEric Van Hensbergen } 11852bad8471SEric Van Hensbergen 11862bad8471SEric Van Hensbergen /** 11872bad8471SEric Van Hensbergen * v9fs_qid2ino - convert qid into inode number 11882bad8471SEric Van Hensbergen * @qid: qid to hash 11892bad8471SEric Van Hensbergen * 11902bad8471SEric Van Hensbergen * BUG: potential for inode number collisions? 11912bad8471SEric Van Hensbergen */ 11922bad8471SEric Van Hensbergen 1193bd238fb4SLatchesar Ionkov ino_t v9fs_qid2ino(struct p9_qid *qid) 11942bad8471SEric Van Hensbergen { 11952bad8471SEric Van Hensbergen u64 path = qid->path + 2; 11962bad8471SEric Van Hensbergen ino_t i = 0; 11972bad8471SEric Van Hensbergen 11982bad8471SEric Van Hensbergen if (sizeof(ino_t) == sizeof(path)) 11992bad8471SEric Van Hensbergen memcpy(&i, &path, sizeof(ino_t)); 12002bad8471SEric Van Hensbergen else 12012bad8471SEric Van Hensbergen i = (ino_t) (path ^ (path >> 32)); 12022bad8471SEric Van Hensbergen 12032bad8471SEric Van Hensbergen return i; 12042bad8471SEric Van Hensbergen } 12052bad8471SEric Van Hensbergen 12062bad8471SEric Van Hensbergen /** 12076b255391SAl Viro * v9fs_vfs_get_link - follow a symlink path 12082bad8471SEric Van Hensbergen * @dentry: dentry for symlink 12096b255391SAl Viro * @inode: inode for symlink 1210fceef393SAl Viro * @done: delayed call for when we are done with the return value 12112bad8471SEric Van Hensbergen */ 12122bad8471SEric Van Hensbergen 12136b255391SAl Viro static const char *v9fs_vfs_get_link(struct dentry *dentry, 1214fceef393SAl Viro struct inode *inode, 1215fceef393SAl Viro struct delayed_call *done) 12162bad8471SEric Van Hensbergen { 12176b255391SAl Viro struct v9fs_session_info *v9ses; 12186b255391SAl Viro struct p9_fid *fid; 121990e4fc88SAl Viro struct p9_wstat *st; 1220680baacbSAl Viro char *res; 12212bad8471SEric Van Hensbergen 12226b255391SAl Viro if (!dentry) 12236b255391SAl Viro return ERR_PTR(-ECHILD); 12246b255391SAl Viro 12256b255391SAl Viro v9ses = v9fs_dentry2v9ses(dentry); 1226e5690f26SDominique Martinet if (!v9fs_proto_dotu(v9ses)) 1227e5690f26SDominique Martinet return ERR_PTR(-EBADF); 1228e5690f26SDominique Martinet 12294b8e9923SAl Viro p9_debug(P9_DEBUG_VFS, "%pd\n", dentry); 1230e5690f26SDominique Martinet fid = v9fs_fid_lookup(dentry); 12312bad8471SEric Van Hensbergen 123290e4fc88SAl Viro if (IS_ERR(fid)) 123390e4fc88SAl Viro return ERR_CAST(fid); 12342bad8471SEric Van Hensbergen 123590e4fc88SAl Viro st = p9_client_stat(fid); 1236b48dbb99SDominique Martinet p9_fid_put(fid); 123790e4fc88SAl Viro if (IS_ERR(st)) 123890e4fc88SAl Viro return ERR_CAST(st); 123990e4fc88SAl Viro 124090e4fc88SAl Viro if (!(st->mode & P9_DMSYMLINK)) { 124190e4fc88SAl Viro p9stat_free(st); 124290e4fc88SAl Viro kfree(st); 124390e4fc88SAl Viro return ERR_PTR(-EINVAL); 12442bad8471SEric Van Hensbergen } 1245680baacbSAl Viro res = st->extension; 124690e4fc88SAl Viro st->extension = NULL; 1247680baacbSAl Viro if (strlen(res) >= PATH_MAX) 1248680baacbSAl Viro res[PATH_MAX - 1] = '\0'; 1249680baacbSAl Viro 125090e4fc88SAl Viro p9stat_free(st); 125190e4fc88SAl Viro kfree(st); 1252fceef393SAl Viro set_delayed_call(done, kfree_link, res); 1253fceef393SAl Viro return res; 12542bad8471SEric Van Hensbergen } 12552bad8471SEric Van Hensbergen 12562bad8471SEric Van Hensbergen /** 1257ee443996SEric Van Hensbergen * v9fs_vfs_mkspecial - create a special file 1258ee443996SEric Van Hensbergen * @dir: inode to create special file in 1259ee443996SEric Van Hensbergen * @dentry: dentry to create 1260fd2916bdSFabian Frederick * @perm: mode to create special file 1261ee443996SEric Van Hensbergen * @extension: 9p2000.u format extension string representing special file 1262ee443996SEric Van Hensbergen * 1263ee443996SEric Van Hensbergen */ 1264ee443996SEric Van Hensbergen 1265531b1094SLatchesar Ionkov static int v9fs_vfs_mkspecial(struct inode *dir, struct dentry *dentry, 1266c2837de7SAl Viro u32 perm, const char *extension) 1267531b1094SLatchesar Ionkov { 1268bd238fb4SLatchesar Ionkov struct p9_fid *fid; 1269d28c61f0SAneesh Kumar K.V struct v9fs_session_info *v9ses; 1270531b1094SLatchesar Ionkov 12716a3124a3SLatchesar Ionkov v9ses = v9fs_inode2v9ses(dir); 1272dd6102fbSSripathi Kodi if (!v9fs_proto_dotu(v9ses)) { 12735d385153SJoe Perches p9_debug(P9_DEBUG_ERROR, "not extended\n"); 12746a3124a3SLatchesar Ionkov return -EPERM; 1275531b1094SLatchesar Ionkov } 1276531b1094SLatchesar Ionkov 1277bd238fb4SLatchesar Ionkov fid = v9fs_create(v9ses, dir, dentry, (char *) extension, perm, 1278bd238fb4SLatchesar Ionkov P9_OREAD); 1279bd238fb4SLatchesar Ionkov if (IS_ERR(fid)) 1280bd238fb4SLatchesar Ionkov return PTR_ERR(fid); 1281da977b2cSEric Van Hensbergen 1282d28c61f0SAneesh Kumar K.V v9fs_invalidate_inode_attr(dir); 1283b48dbb99SDominique Martinet p9_fid_put(fid); 12846a3124a3SLatchesar Ionkov return 0; 1285531b1094SLatchesar Ionkov } 1286531b1094SLatchesar Ionkov 1287531b1094SLatchesar Ionkov /** 1288531b1094SLatchesar Ionkov * v9fs_vfs_symlink - helper function to create symlinks 12897a77db95SChristian Brauner * @idmap: idmap of the mount 1290531b1094SLatchesar Ionkov * @dir: directory inode containing symlink 1291531b1094SLatchesar Ionkov * @dentry: dentry for symlink 1292531b1094SLatchesar Ionkov * @symname: symlink data 1293531b1094SLatchesar Ionkov * 1294ee443996SEric Van Hensbergen * See Also: 9P2000.u RFC for more information 1295531b1094SLatchesar Ionkov * 1296531b1094SLatchesar Ionkov */ 1297531b1094SLatchesar Ionkov 1298531b1094SLatchesar Ionkov static int 12997a77db95SChristian Brauner v9fs_vfs_symlink(struct mnt_idmap *idmap, struct inode *dir, 1300549c7297SChristian Brauner struct dentry *dentry, const char *symname) 1301531b1094SLatchesar Ionkov { 13024b8e9923SAl Viro p9_debug(P9_DEBUG_VFS, " %lu,%pd,%s\n", 13034b8e9923SAl Viro dir->i_ino, dentry, symname); 1304531b1094SLatchesar Ionkov 1305c2837de7SAl Viro return v9fs_vfs_mkspecial(dir, dentry, P9_DMSYMLINK, symname); 1306531b1094SLatchesar Ionkov } 1307531b1094SLatchesar Ionkov 1308b46c267eSAl Viro #define U32_MAX_DIGITS 10 1309b46c267eSAl Viro 13102bad8471SEric Van Hensbergen /** 13112bad8471SEric Van Hensbergen * v9fs_vfs_link - create a hardlink 13122bad8471SEric Van Hensbergen * @old_dentry: dentry for file to link to 13132bad8471SEric Van Hensbergen * @dir: inode destination for new link 131473c592b9SEric Van Hensbergen * @dentry: dentry for link 13152bad8471SEric Van Hensbergen * 13162bad8471SEric Van Hensbergen */ 13172bad8471SEric Van Hensbergen 13182bad8471SEric Van Hensbergen static int 13192bad8471SEric Van Hensbergen v9fs_vfs_link(struct dentry *old_dentry, struct inode *dir, 13202bad8471SEric Van Hensbergen struct dentry *dentry) 13212bad8471SEric Van Hensbergen { 1322531b1094SLatchesar Ionkov int retval; 1323b46c267eSAl Viro char name[1 + U32_MAX_DIGITS + 2]; /* sign + number + \n + \0 */ 1324d28c61f0SAneesh Kumar K.V struct p9_fid *oldfid; 13252bad8471SEric Van Hensbergen 13264b8e9923SAl Viro p9_debug(P9_DEBUG_VFS, " %lu,%pd,%pd\n", 13274b8e9923SAl Viro dir->i_ino, dentry, old_dentry); 13282bad8471SEric Van Hensbergen 1329da977b2cSEric Van Hensbergen oldfid = v9fs_fid_clone(old_dentry); 1330da977b2cSEric Van Hensbergen if (IS_ERR(oldfid)) 1331da977b2cSEric Van Hensbergen return PTR_ERR(oldfid); 13322bad8471SEric Van Hensbergen 133316cce6d2SLatchesar Ionkov sprintf(name, "%d\n", oldfid->fid); 1334bd238fb4SLatchesar Ionkov retval = v9fs_vfs_mkspecial(dir, dentry, P9_DMLINK, name); 1335c06c066aSAneesh Kumar K.V if (!retval) { 13362b0143b5SDavid Howells v9fs_refresh_inode(oldfid, d_inode(old_dentry)); 1337d28c61f0SAneesh Kumar K.V v9fs_invalidate_inode_attr(dir); 1338c06c066aSAneesh Kumar K.V } 1339b48dbb99SDominique Martinet p9_fid_put(oldfid); 13402bad8471SEric Van Hensbergen return retval; 13412bad8471SEric Van Hensbergen } 13422bad8471SEric Van Hensbergen 13432bad8471SEric Van Hensbergen /** 13442bad8471SEric Van Hensbergen * v9fs_vfs_mknod - create a special file 13455ebb29beSChristian Brauner * @idmap: idmap of the mount 13462bad8471SEric Van Hensbergen * @dir: inode destination for new link 13472bad8471SEric Van Hensbergen * @dentry: dentry for file 13482bad8471SEric Van Hensbergen * @mode: mode for creation 1349ee443996SEric Van Hensbergen * @rdev: device associated with special file 13502bad8471SEric Van Hensbergen * 13512bad8471SEric Van Hensbergen */ 13522bad8471SEric Van Hensbergen 13532bad8471SEric Van Hensbergen static int 13545ebb29beSChristian Brauner v9fs_vfs_mknod(struct mnt_idmap *idmap, struct inode *dir, 1355549c7297SChristian Brauner struct dentry *dentry, umode_t mode, dev_t rdev) 13562bad8471SEric Van Hensbergen { 1357c2837de7SAl Viro struct v9fs_session_info *v9ses = v9fs_inode2v9ses(dir); 1358531b1094SLatchesar Ionkov int retval; 1359b46c267eSAl Viro char name[2 + U32_MAX_DIGITS + 1 + U32_MAX_DIGITS + 1]; 1360c2837de7SAl Viro u32 perm; 13612bad8471SEric Van Hensbergen 13626e195b0fSDominique Martinet p9_debug(P9_DEBUG_VFS, " %lu,%pd mode: %x MAJOR: %u MINOR: %u\n", 13634b8e9923SAl Viro dir->i_ino, dentry, mode, 13645d385153SJoe Perches MAJOR(rdev), MINOR(rdev)); 13652bad8471SEric Van Hensbergen 13662bad8471SEric Van Hensbergen /* build extension */ 13672bad8471SEric Van Hensbergen if (S_ISBLK(mode)) 1368531b1094SLatchesar Ionkov sprintf(name, "b %u %u", MAJOR(rdev), MINOR(rdev)); 13692bad8471SEric Van Hensbergen else if (S_ISCHR(mode)) 1370531b1094SLatchesar Ionkov sprintf(name, "c %u %u", MAJOR(rdev), MINOR(rdev)); 1371b46c267eSAl Viro else 1372531b1094SLatchesar Ionkov *name = 0; 13732bad8471SEric Van Hensbergen 1374c2837de7SAl Viro perm = unixmode2p9mode(v9ses, mode); 1375c2837de7SAl Viro retval = v9fs_vfs_mkspecial(dir, dentry, perm, name); 13762bad8471SEric Van Hensbergen 13772bad8471SEric Van Hensbergen return retval; 13782bad8471SEric Van Hensbergen } 13792bad8471SEric Van Hensbergen 1380b3cbea03SAneesh Kumar K.V int v9fs_refresh_inode(struct p9_fid *fid, struct inode *inode) 1381b3cbea03SAneesh Kumar K.V { 138245089142SAneesh Kumar K.V int umode; 138345089142SAneesh Kumar K.V dev_t rdev; 1384b3cbea03SAneesh Kumar K.V struct p9_wstat *st; 1385b3cbea03SAneesh Kumar K.V struct v9fs_session_info *v9ses; 13865e3cc1eeSHou Tao unsigned int flags; 1387b3cbea03SAneesh Kumar K.V 1388b3cbea03SAneesh Kumar K.V v9ses = v9fs_inode2v9ses(inode); 1389b3cbea03SAneesh Kumar K.V st = p9_client_stat(fid); 1390b3cbea03SAneesh Kumar K.V if (IS_ERR(st)) 1391b3cbea03SAneesh Kumar K.V return PTR_ERR(st); 139245089142SAneesh Kumar K.V /* 139345089142SAneesh Kumar K.V * Don't update inode if the file type is different 139445089142SAneesh Kumar K.V */ 139545089142SAneesh Kumar K.V umode = p9mode2unixmode(v9ses, st, &rdev); 13966e3e2c43SAl Viro if (inode_wrong_type(inode, umode)) 139745089142SAneesh Kumar K.V goto out; 1398b3cbea03SAneesh Kumar K.V 1399b3cbea03SAneesh Kumar K.V /* 1400b3cbea03SAneesh Kumar K.V * We don't want to refresh inode->i_size, 1401b3cbea03SAneesh Kumar K.V * because we may have cached data 1402b3cbea03SAneesh Kumar K.V */ 14035e3cc1eeSHou Tao flags = (v9ses->cache == CACHE_LOOSE || v9ses->cache == CACHE_FSCACHE) ? 14045e3cc1eeSHou Tao V9FS_STAT2INODE_KEEP_ISIZE : 0; 14055e3cc1eeSHou Tao v9fs_stat2inode(st, inode, inode->i_sb, flags); 140645089142SAneesh Kumar K.V out: 1407b3cbea03SAneesh Kumar K.V p9stat_free(st); 1408b3cbea03SAneesh Kumar K.V kfree(st); 1409b3cbea03SAneesh Kumar K.V return 0; 1410b3cbea03SAneesh Kumar K.V } 1411b3cbea03SAneesh Kumar K.V 14129b6533c9SSripathi Kodi static const struct inode_operations v9fs_dir_inode_operations_dotu = { 14139b6533c9SSripathi Kodi .create = v9fs_vfs_create, 14149b6533c9SSripathi Kodi .lookup = v9fs_vfs_lookup, 1415e43ae79cSMiklos Szeredi .atomic_open = v9fs_vfs_atomic_open, 14169b6533c9SSripathi Kodi .symlink = v9fs_vfs_symlink, 141750cc42ffSVenkateswararao Jujjuri (JV) .link = v9fs_vfs_link, 14189b6533c9SSripathi Kodi .unlink = v9fs_vfs_unlink, 14199b6533c9SSripathi Kodi .mkdir = v9fs_vfs_mkdir, 14209b6533c9SSripathi Kodi .rmdir = v9fs_vfs_rmdir, 14211d76e313SAneesh Kumar K.V .mknod = v9fs_vfs_mknod, 14229b6533c9SSripathi Kodi .rename = v9fs_vfs_rename, 14239b6533c9SSripathi Kodi .getattr = v9fs_vfs_getattr, 14249b6533c9SSripathi Kodi .setattr = v9fs_vfs_setattr, 14259b6533c9SSripathi Kodi }; 14269b6533c9SSripathi Kodi 1427754661f1SArjan van de Ven static const struct inode_operations v9fs_dir_inode_operations = { 1428b501611aSEric Van Hensbergen .create = v9fs_vfs_create, 1429b501611aSEric Van Hensbergen .lookup = v9fs_vfs_lookup, 1430e43ae79cSMiklos Szeredi .atomic_open = v9fs_vfs_atomic_open, 1431b501611aSEric Van Hensbergen .unlink = v9fs_vfs_unlink, 1432b501611aSEric Van Hensbergen .mkdir = v9fs_vfs_mkdir, 1433b501611aSEric Van Hensbergen .rmdir = v9fs_vfs_rmdir, 1434b501611aSEric Van Hensbergen .mknod = v9fs_vfs_mknod, 1435b501611aSEric Van Hensbergen .rename = v9fs_vfs_rename, 1436b501611aSEric Van Hensbergen .getattr = v9fs_vfs_getattr, 1437b501611aSEric Van Hensbergen .setattr = v9fs_vfs_setattr, 1438b501611aSEric Van Hensbergen }; 1439b501611aSEric Van Hensbergen 1440754661f1SArjan van de Ven static const struct inode_operations v9fs_file_inode_operations = { 14412bad8471SEric Van Hensbergen .getattr = v9fs_vfs_getattr, 14422bad8471SEric Van Hensbergen .setattr = v9fs_vfs_setattr, 14432bad8471SEric Van Hensbergen }; 14442bad8471SEric Van Hensbergen 1445754661f1SArjan van de Ven static const struct inode_operations v9fs_symlink_inode_operations = { 14466b255391SAl Viro .get_link = v9fs_vfs_get_link, 14472bad8471SEric Van Hensbergen .getattr = v9fs_vfs_getattr, 14482bad8471SEric Van Hensbergen .setattr = v9fs_vfs_setattr, 14492bad8471SEric Van Hensbergen }; 14509b6533c9SSripathi Kodi 1451