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 { 374*4eb31178SEric Van Hensbergen struct v9fs_inode __maybe_unused *v9inode = V9FS_I(inode); 375*4eb31178SEric Van Hensbergen __le32 __maybe_unused version; 3766b39f6d2SAneesh Kumar K.V 3774ad78628SAl Viro truncate_inode_pages_final(&inode->i_data); 378*4eb31178SEric Van Hensbergen 379*4eb31178SEric Van Hensbergen #ifdef CONFIG_9P_FSCACHE 38093c84614SDavid Howells version = cpu_to_le32(v9inode->qid.version); 38193c84614SDavid Howells fscache_clear_inode_writeback(v9fs_inode_cookie(v9inode), inode, 38293c84614SDavid Howells &version); 383*4eb31178SEric Van Hensbergen #endif 384*4eb31178SEric Van Hensbergen 385dbd5768fSJan Kara clear_inode(inode); 3864ad78628SAl Viro filemap_fdatawrite(&inode->i_data); 38760e78d2cSAbhishek Kulkarni 388*4eb31178SEric Van Hensbergen #ifdef CONFIG_9P_FSCACHE 38924e42e32SDavid Howells fscache_relinquish_cookie(v9fs_inode_cookie(v9inode), false); 390*4eb31178SEric Van Hensbergen #endif 3913cf387d7SAneesh Kumar K.V } 39260e78d2cSAbhishek Kulkarni 393fd2421f5SAneesh Kumar K.V static int v9fs_test_inode(struct inode *inode, void *data) 394fd2421f5SAneesh Kumar K.V { 395fd2421f5SAneesh Kumar K.V int umode; 39645089142SAneesh Kumar K.V dev_t rdev; 397fd2421f5SAneesh Kumar K.V struct v9fs_inode *v9inode = V9FS_I(inode); 398fd2421f5SAneesh Kumar K.V struct p9_wstat *st = (struct p9_wstat *)data; 399fd2421f5SAneesh Kumar K.V struct v9fs_session_info *v9ses = v9fs_inode2v9ses(inode); 400fd2421f5SAneesh Kumar K.V 40145089142SAneesh Kumar K.V umode = p9mode2unixmode(v9ses, st, &rdev); 402fd2421f5SAneesh Kumar K.V /* don't match inode of different type */ 4036e3e2c43SAl Viro if (inode_wrong_type(inode, umode)) 404fd2421f5SAneesh Kumar K.V return 0; 405fd2421f5SAneesh Kumar K.V 406fd2421f5SAneesh Kumar K.V /* compare qid details */ 407fd2421f5SAneesh Kumar K.V if (memcmp(&v9inode->qid.version, 408fd2421f5SAneesh Kumar K.V &st->qid.version, sizeof(v9inode->qid.version))) 409fd2421f5SAneesh Kumar K.V return 0; 410fd2421f5SAneesh Kumar K.V 411fd2421f5SAneesh Kumar K.V if (v9inode->qid.type != st->qid.type) 412fd2421f5SAneesh Kumar K.V return 0; 4138ee03163STuomas Tynkkynen 4148ee03163STuomas Tynkkynen if (v9inode->qid.path != st->qid.path) 4158ee03163STuomas Tynkkynen return 0; 416fd2421f5SAneesh Kumar K.V return 1; 417fd2421f5SAneesh Kumar K.V } 418fd2421f5SAneesh Kumar K.V 419ed80fcfaSAneesh Kumar K.V static int v9fs_test_new_inode(struct inode *inode, void *data) 420ed80fcfaSAneesh Kumar K.V { 421ed80fcfaSAneesh Kumar K.V return 0; 422ed80fcfaSAneesh Kumar K.V } 423ed80fcfaSAneesh Kumar K.V 424fd2421f5SAneesh Kumar K.V static int v9fs_set_inode(struct inode *inode, void *data) 425fd2421f5SAneesh Kumar K.V { 426fd2421f5SAneesh Kumar K.V struct v9fs_inode *v9inode = V9FS_I(inode); 427fd2421f5SAneesh Kumar K.V struct p9_wstat *st = (struct p9_wstat *)data; 428fd2421f5SAneesh Kumar K.V 429fd2421f5SAneesh Kumar K.V memcpy(&v9inode->qid, &st->qid, sizeof(st->qid)); 430fd2421f5SAneesh Kumar K.V return 0; 431fd2421f5SAneesh Kumar K.V } 432fd2421f5SAneesh Kumar K.V 4335ffc0cb3SAneesh Kumar K.V static struct inode *v9fs_qid_iget(struct super_block *sb, 4345ffc0cb3SAneesh Kumar K.V struct p9_qid *qid, 435ed80fcfaSAneesh Kumar K.V struct p9_wstat *st, 436ed80fcfaSAneesh Kumar K.V int new) 4375ffc0cb3SAneesh Kumar K.V { 43845089142SAneesh Kumar K.V dev_t rdev; 4393eda0de6SAl Viro int retval; 4403eda0de6SAl Viro umode_t umode; 4415ffc0cb3SAneesh Kumar K.V unsigned long i_ino; 4425ffc0cb3SAneesh Kumar K.V struct inode *inode; 4435ffc0cb3SAneesh Kumar K.V struct v9fs_session_info *v9ses = sb->s_fs_info; 4446e195b0fSDominique Martinet int (*test)(struct inode *inode, void *data); 445ed80fcfaSAneesh Kumar K.V 446ed80fcfaSAneesh Kumar K.V if (new) 447ed80fcfaSAneesh Kumar K.V test = v9fs_test_new_inode; 448ed80fcfaSAneesh Kumar K.V else 449ed80fcfaSAneesh Kumar K.V test = v9fs_test_inode; 4505ffc0cb3SAneesh Kumar K.V 4515ffc0cb3SAneesh Kumar K.V i_ino = v9fs_qid2ino(qid); 452ed80fcfaSAneesh Kumar K.V inode = iget5_locked(sb, i_ino, test, v9fs_set_inode, st); 4535ffc0cb3SAneesh Kumar K.V if (!inode) 4545ffc0cb3SAneesh Kumar K.V return ERR_PTR(-ENOMEM); 4555ffc0cb3SAneesh Kumar K.V if (!(inode->i_state & I_NEW)) 4565ffc0cb3SAneesh Kumar K.V return inode; 4575ffc0cb3SAneesh Kumar K.V /* 4585ffc0cb3SAneesh Kumar K.V * initialize the inode with the stat info 4595ffc0cb3SAneesh Kumar K.V * FIXME!! we may need support for stale inodes 4605ffc0cb3SAneesh Kumar K.V * later. 4615ffc0cb3SAneesh Kumar K.V */ 462fd2421f5SAneesh Kumar K.V inode->i_ino = i_ino; 46345089142SAneesh Kumar K.V umode = p9mode2unixmode(v9ses, st, &rdev); 46445089142SAneesh Kumar K.V retval = v9fs_init_inode(v9ses, inode, umode, rdev); 4655ffc0cb3SAneesh Kumar K.V if (retval) 4665ffc0cb3SAneesh Kumar K.V goto error; 4675ffc0cb3SAneesh Kumar K.V 4685e3cc1eeSHou Tao v9fs_stat2inode(st, inode, sb, 0); 4695ffc0cb3SAneesh Kumar K.V v9fs_cache_inode_get_cookie(inode); 4705ffc0cb3SAneesh Kumar K.V unlock_new_inode(inode); 4715ffc0cb3SAneesh Kumar K.V return inode; 4725ffc0cb3SAneesh Kumar K.V error: 4730a73d0a2SAl Viro iget_failed(inode); 4745ffc0cb3SAneesh Kumar K.V return ERR_PTR(retval); 4755ffc0cb3SAneesh Kumar K.V 4765ffc0cb3SAneesh Kumar K.V } 4775ffc0cb3SAneesh Kumar K.V 47853c06f4eSAneesh Kumar K.V struct inode * 479a78ce05dSAneesh Kumar K.V v9fs_inode_from_fid(struct v9fs_session_info *v9ses, struct p9_fid *fid, 480ed80fcfaSAneesh Kumar K.V struct super_block *sb, int new) 4816a3124a3SLatchesar Ionkov { 48251a87c55SEric Van Hensbergen struct p9_wstat *st; 4835ffc0cb3SAneesh Kumar K.V struct inode *inode = NULL; 4846a3124a3SLatchesar Ionkov 485bd238fb4SLatchesar Ionkov st = p9_client_stat(fid); 48602bc3567SAbhishek Kulkarni if (IS_ERR(st)) 48702bc3567SAbhishek Kulkarni return ERR_CAST(st); 4882bad8471SEric Van Hensbergen 489ed80fcfaSAneesh Kumar K.V inode = v9fs_qid_iget(sb, &st->qid, st, new); 49002bc3567SAbhishek Kulkarni p9stat_free(st); 491bd238fb4SLatchesar Ionkov kfree(st); 4925ffc0cb3SAneesh Kumar K.V return inode; 4932bad8471SEric Van Hensbergen } 4942bad8471SEric Van Hensbergen 4952bad8471SEric Van Hensbergen /** 496f88657ceSAneesh Kumar K.V * v9fs_at_to_dotl_flags- convert Linux specific AT flags to 497f88657ceSAneesh Kumar K.V * plan 9 AT flag. 498f88657ceSAneesh Kumar K.V * @flags: flags to convert 499f88657ceSAneesh Kumar K.V */ 500f88657ceSAneesh Kumar K.V static int v9fs_at_to_dotl_flags(int flags) 501f88657ceSAneesh Kumar K.V { 502f88657ceSAneesh Kumar K.V int rflags = 0; 5036e195b0fSDominique Martinet 504f88657ceSAneesh Kumar K.V if (flags & AT_REMOVEDIR) 505f88657ceSAneesh Kumar K.V rflags |= P9_DOTL_AT_REMOVEDIR; 5066e195b0fSDominique Martinet 507f88657ceSAneesh Kumar K.V return rflags; 508f88657ceSAneesh Kumar K.V } 509f88657ceSAneesh Kumar K.V 510f88657ceSAneesh Kumar K.V /** 511ac89b2efSEryu Guan * v9fs_dec_count - helper functon to drop i_nlink. 512ac89b2efSEryu Guan * 513ac89b2efSEryu Guan * If a directory had nlink <= 2 (including . and ..), then we should not drop 514ac89b2efSEryu Guan * the link count, which indicates the underlying exported fs doesn't maintain 515ac89b2efSEryu Guan * nlink accurately. e.g. 516ac89b2efSEryu Guan * - overlayfs sets nlink to 1 for merged dir 517ac89b2efSEryu Guan * - ext4 (with dir_nlink feature enabled) sets nlink to 1 if a dir has more 518ac89b2efSEryu Guan * than EXT4_LINK_MAX (65000) links. 519ac89b2efSEryu Guan * 520ac89b2efSEryu Guan * @inode: inode whose nlink is being dropped 521ac89b2efSEryu Guan */ 522ac89b2efSEryu Guan static void v9fs_dec_count(struct inode *inode) 523ac89b2efSEryu Guan { 524ac89b2efSEryu Guan if (!S_ISDIR(inode->i_mode) || inode->i_nlink > 2) 525ac89b2efSEryu Guan drop_nlink(inode); 526ac89b2efSEryu Guan } 527ac89b2efSEryu Guan 528ac89b2efSEryu Guan /** 5292bad8471SEric Van Hensbergen * v9fs_remove - helper function to remove files and directories 53073c592b9SEric Van Hensbergen * @dir: directory inode that is being deleted 53148e370ffSAneesh Kumar K.V * @dentry: dentry that is being deleted 532fd2916bdSFabian Frederick * @flags: removing a directory 5332bad8471SEric Van Hensbergen * 5342bad8471SEric Van Hensbergen */ 5352bad8471SEric Van Hensbergen 53648e370ffSAneesh Kumar K.V static int v9fs_remove(struct inode *dir, struct dentry *dentry, int flags) 5372bad8471SEric Van Hensbergen { 53848e370ffSAneesh Kumar K.V struct inode *inode; 53948e370ffSAneesh Kumar K.V int retval = -EOPNOTSUPP; 54048e370ffSAneesh Kumar K.V struct p9_fid *v9fid, *dfid; 54148e370ffSAneesh Kumar K.V struct v9fs_session_info *v9ses; 5422bad8471SEric Van Hensbergen 5435d385153SJoe Perches p9_debug(P9_DEBUG_VFS, "inode: %p dentry: %p rmdir: %x\n", 54448e370ffSAneesh Kumar K.V dir, dentry, flags); 5452bad8471SEric Van Hensbergen 54648e370ffSAneesh Kumar K.V v9ses = v9fs_inode2v9ses(dir); 5472b0143b5SDavid Howells inode = d_inode(dentry); 54877d5a6b7SAl Viro dfid = v9fs_parent_fid(dentry); 54948e370ffSAneesh Kumar K.V if (IS_ERR(dfid)) { 55048e370ffSAneesh Kumar K.V retval = PTR_ERR(dfid); 5515d385153SJoe Perches p9_debug(P9_DEBUG_VFS, "fid lookup failed %d\n", retval); 55248e370ffSAneesh Kumar K.V return retval; 55348e370ffSAneesh Kumar K.V } 55448e370ffSAneesh Kumar K.V if (v9fs_proto_dotl(v9ses)) 555f88657ceSAneesh Kumar K.V retval = p9_client_unlinkat(dfid, dentry->d_name.name, 556f88657ceSAneesh Kumar K.V v9fs_at_to_dotl_flags(flags)); 557b48dbb99SDominique Martinet p9_fid_put(dfid); 55848e370ffSAneesh Kumar K.V if (retval == -EOPNOTSUPP) { 55948e370ffSAneesh Kumar K.V /* Try the one based on path */ 56048e370ffSAneesh Kumar K.V v9fid = v9fs_fid_clone(dentry); 561da977b2cSEric Van Hensbergen if (IS_ERR(v9fid)) 562da977b2cSEric Van Hensbergen return PTR_ERR(v9fid); 563d994f405SAneesh Kumar K.V retval = p9_client_remove(v9fid); 56448e370ffSAneesh Kumar K.V } 565b271ec47SAneesh Kumar K.V if (!retval) { 566b271ec47SAneesh Kumar K.V /* 567b271ec47SAneesh Kumar K.V * directories on unlink should have zero 568b271ec47SAneesh Kumar K.V * link count 569b271ec47SAneesh Kumar K.V */ 57048e370ffSAneesh Kumar K.V if (flags & AT_REMOVEDIR) { 57148e370ffSAneesh Kumar K.V clear_nlink(inode); 572ac89b2efSEryu Guan v9fs_dec_count(dir); 573b271ec47SAneesh Kumar K.V } else 574ac89b2efSEryu Guan v9fs_dec_count(inode); 575d28c61f0SAneesh Kumar K.V 57648e370ffSAneesh Kumar K.V v9fs_invalidate_inode_attr(inode); 577d28c61f0SAneesh Kumar K.V v9fs_invalidate_inode_attr(dir); 578154372e6SEric Van Hensbergen 579154372e6SEric Van Hensbergen /* invalidate all fids associated with dentry */ 580154372e6SEric Van Hensbergen /* NOTE: This will not include open fids */ 581154372e6SEric Van Hensbergen dentry->d_op->d_release(dentry); 582b271ec47SAneesh Kumar K.V } 583d994f405SAneesh Kumar K.V return retval; 5842bad8471SEric Van Hensbergen } 5852bad8471SEric Van Hensbergen 586bd238fb4SLatchesar Ionkov /** 587bd238fb4SLatchesar Ionkov * v9fs_create - Create a file 588ee443996SEric Van Hensbergen * @v9ses: session information 589ee443996SEric Van Hensbergen * @dir: directory that dentry is being created in 590bd238fb4SLatchesar Ionkov * @dentry: dentry that is being created 5910e15597eSAbhishek Kulkarni * @extension: 9p2000.u extension string to support devices, etc. 592bd238fb4SLatchesar Ionkov * @perm: create permissions 593bd238fb4SLatchesar Ionkov * @mode: open mode 594bd238fb4SLatchesar Ionkov * 595bd238fb4SLatchesar Ionkov */ 596bd238fb4SLatchesar Ionkov static struct p9_fid * 597bd238fb4SLatchesar Ionkov v9fs_create(struct v9fs_session_info *v9ses, struct inode *dir, 598bd238fb4SLatchesar Ionkov struct dentry *dentry, char *extension, u32 perm, u8 mode) 599bd238fb4SLatchesar Ionkov { 600bd238fb4SLatchesar Ionkov int err; 6017880b43bSAl Viro const unsigned char *name; 6026636b6dcSJianyong Wu struct p9_fid *dfid, *ofid = NULL, *fid = NULL; 603bd238fb4SLatchesar Ionkov struct inode *inode; 604bd238fb4SLatchesar Ionkov 6054b8e9923SAl Viro p9_debug(P9_DEBUG_VFS, "name %pd\n", dentry); 60651a87c55SEric Van Hensbergen 607bd238fb4SLatchesar Ionkov err = 0; 6087880b43bSAl Viro name = dentry->d_name.name; 60977d5a6b7SAl Viro dfid = v9fs_parent_fid(dentry); 610bd238fb4SLatchesar Ionkov if (IS_ERR(dfid)) { 611bd238fb4SLatchesar Ionkov err = PTR_ERR(dfid); 6125d385153SJoe Perches p9_debug(P9_DEBUG_VFS, "fid lookup failed %d\n", err); 6136d27e64dSVenkateswararao Jujjuri return ERR_PTR(err); 614bd238fb4SLatchesar Ionkov } 615bd238fb4SLatchesar Ionkov 616bd238fb4SLatchesar Ionkov /* clone a fid to use for creation */ 6177d50a29fSAl Viro ofid = clone_fid(dfid); 618bd238fb4SLatchesar Ionkov if (IS_ERR(ofid)) { 619bd238fb4SLatchesar Ionkov err = PTR_ERR(ofid); 6205d385153SJoe Perches p9_debug(P9_DEBUG_VFS, "p9_client_walk failed %d\n", err); 621dafbe689SDominique Martinet goto error; 622bd238fb4SLatchesar Ionkov } 623bd238fb4SLatchesar Ionkov 624bd238fb4SLatchesar Ionkov err = p9_client_fcreate(ofid, name, perm, mode, extension); 62551a87c55SEric Van Hensbergen if (err < 0) { 6265d385153SJoe Perches p9_debug(P9_DEBUG_VFS, "p9_client_fcreate failed %d\n", err); 627bd238fb4SLatchesar Ionkov goto error; 62851a87c55SEric Van Hensbergen } 629bd238fb4SLatchesar Ionkov 630b6054793SAneesh Kumar K.V if (!(perm & P9_DMLINK)) { 631bd238fb4SLatchesar Ionkov /* now walk from the parent so we can get unopened fid */ 6326d27e64dSVenkateswararao Jujjuri fid = p9_client_walk(dfid, 1, &name, 1); 633bd238fb4SLatchesar Ionkov if (IS_ERR(fid)) { 634bd238fb4SLatchesar Ionkov err = PTR_ERR(fid); 635b6054793SAneesh Kumar K.V p9_debug(P9_DEBUG_VFS, 636b6054793SAneesh Kumar K.V "p9_client_walk failed %d\n", err); 637bd238fb4SLatchesar Ionkov goto error; 6386d27e64dSVenkateswararao Jujjuri } 639b6054793SAneesh Kumar K.V /* 640b6054793SAneesh Kumar K.V * instantiate inode and assign the unopened fid to the dentry 641b6054793SAneesh Kumar K.V */ 642ed80fcfaSAneesh Kumar K.V inode = v9fs_get_new_inode_from_fid(v9ses, fid, dir->i_sb); 643bd238fb4SLatchesar Ionkov if (IS_ERR(inode)) { 644bd238fb4SLatchesar Ionkov err = PTR_ERR(inode); 645b6054793SAneesh Kumar K.V p9_debug(P9_DEBUG_VFS, 646b6054793SAneesh Kumar K.V "inode creation failed %d\n", err); 647bd238fb4SLatchesar Ionkov goto error; 648bd238fb4SLatchesar Ionkov } 649dafbe689SDominique Martinet v9fs_fid_add(dentry, &fid); 6505441ae5eSAneesh Kumar K.V d_instantiate(dentry, inode); 651b6054793SAneesh Kumar K.V } 652b48dbb99SDominique Martinet p9_fid_put(dfid); 653bd238fb4SLatchesar Ionkov return ofid; 654bd238fb4SLatchesar Ionkov error: 655dafbe689SDominique Martinet p9_fid_put(dfid); 656b48dbb99SDominique Martinet p9_fid_put(ofid); 657b48dbb99SDominique Martinet p9_fid_put(fid); 658bd238fb4SLatchesar Ionkov return ERR_PTR(err); 659bd238fb4SLatchesar Ionkov } 660bd238fb4SLatchesar Ionkov 6612bad8471SEric Van Hensbergen /** 662e43ae79cSMiklos Szeredi * v9fs_vfs_create - VFS hook to create a regular file 6636c960e68SChristian Brauner * @idmap: idmap of the mount 664bc868036SDavid Howells * @dir: The parent directory 665bc868036SDavid Howells * @dentry: The name of file to be created 666bc868036SDavid Howells * @mode: The UNIX file mode to set 667bc868036SDavid Howells * @excl: True if the file must not yet exist 668e43ae79cSMiklos Szeredi * 669e43ae79cSMiklos Szeredi * open(.., O_CREAT) is handled in v9fs_vfs_atomic_open(). This is only called 670e43ae79cSMiklos Szeredi * for mknod(2). 671e43ae79cSMiklos Szeredi * 6722bad8471SEric Van Hensbergen */ 6732bad8471SEric Van Hensbergen 6742bad8471SEric Van Hensbergen static int 6756c960e68SChristian Brauner v9fs_vfs_create(struct mnt_idmap *idmap, struct inode *dir, 676549c7297SChristian Brauner struct dentry *dentry, umode_t mode, bool excl) 6772bad8471SEric Van Hensbergen { 678e43ae79cSMiklos Szeredi struct v9fs_session_info *v9ses = v9fs_inode2v9ses(dir); 679e43ae79cSMiklos Szeredi u32 perm = unixmode2p9mode(v9ses, mode); 680e43ae79cSMiklos Szeredi struct p9_fid *fid; 6816a3124a3SLatchesar Ionkov 682e43ae79cSMiklos Szeredi /* P9_OEXCL? */ 683e43ae79cSMiklos Szeredi fid = v9fs_create(v9ses, dir, dentry, NULL, perm, P9_ORDWR); 684e43ae79cSMiklos Szeredi if (IS_ERR(fid)) 685e43ae79cSMiklos Szeredi return PTR_ERR(fid); 6866a3124a3SLatchesar Ionkov 687d28c61f0SAneesh Kumar K.V v9fs_invalidate_inode_attr(dir); 688b48dbb99SDominique Martinet p9_fid_put(fid); 6896a3124a3SLatchesar Ionkov 6906a3124a3SLatchesar Ionkov return 0; 6912bad8471SEric Van Hensbergen } 6922bad8471SEric Van Hensbergen 6932bad8471SEric Van Hensbergen /** 6942bad8471SEric Van Hensbergen * v9fs_vfs_mkdir - VFS mkdir hook to create a directory 695c54bd91eSChristian Brauner * @idmap: idmap of the mount 696ee443996SEric Van Hensbergen * @dir: inode that is being unlinked 6972bad8471SEric Van Hensbergen * @dentry: dentry that is being unlinked 6982bad8471SEric Van Hensbergen * @mode: mode for new directory 6992bad8471SEric Van Hensbergen * 7002bad8471SEric Van Hensbergen */ 7012bad8471SEric Van Hensbergen 702c54bd91eSChristian Brauner static int v9fs_vfs_mkdir(struct mnt_idmap *idmap, struct inode *dir, 703549c7297SChristian Brauner struct dentry *dentry, umode_t mode) 7042bad8471SEric Van Hensbergen { 7056a3124a3SLatchesar Ionkov int err; 706bd238fb4SLatchesar Ionkov u32 perm; 707bd238fb4SLatchesar Ionkov struct p9_fid *fid; 708d28c61f0SAneesh Kumar K.V struct v9fs_session_info *v9ses; 7096a3124a3SLatchesar Ionkov 7104b8e9923SAl Viro p9_debug(P9_DEBUG_VFS, "name %pd\n", dentry); 711bd238fb4SLatchesar Ionkov err = 0; 7126a3124a3SLatchesar Ionkov v9ses = v9fs_inode2v9ses(dir); 7136a3124a3SLatchesar Ionkov perm = unixmode2p9mode(v9ses, mode | S_IFDIR); 714bd238fb4SLatchesar Ionkov fid = v9fs_create(v9ses, dir, dentry, NULL, perm, P9_OREAD); 715bd238fb4SLatchesar Ionkov if (IS_ERR(fid)) { 716bd238fb4SLatchesar Ionkov err = PTR_ERR(fid); 717bd238fb4SLatchesar Ionkov fid = NULL; 718d28c61f0SAneesh Kumar K.V } else { 719b271ec47SAneesh Kumar K.V inc_nlink(dir); 720d28c61f0SAneesh Kumar K.V v9fs_invalidate_inode_attr(dir); 721d28c61f0SAneesh Kumar K.V } 7226a3124a3SLatchesar Ionkov 723bd238fb4SLatchesar Ionkov if (fid) 724b48dbb99SDominique Martinet p9_fid_put(fid); 7256a3124a3SLatchesar Ionkov 7266a3124a3SLatchesar Ionkov return err; 7272bad8471SEric Van Hensbergen } 7282bad8471SEric Van Hensbergen 7292bad8471SEric Van Hensbergen /** 7302bad8471SEric Van Hensbergen * v9fs_vfs_lookup - VFS lookup hook to "walk" to a new inode 7312bad8471SEric Van Hensbergen * @dir: inode that is being walked from 7322bad8471SEric Van Hensbergen * @dentry: dentry that is being walked to? 733fd2916bdSFabian Frederick * @flags: lookup flags (unused) 7342bad8471SEric Van Hensbergen * 7352bad8471SEric Van Hensbergen */ 7362bad8471SEric Van Hensbergen 73753c06f4eSAneesh Kumar K.V struct dentry *v9fs_vfs_lookup(struct inode *dir, struct dentry *dentry, 73800cd8dd3SAl Viro unsigned int flags) 7392bad8471SEric Van Hensbergen { 74073f50717SAneesh Kumar K.V struct dentry *res; 7412bad8471SEric Van Hensbergen struct v9fs_session_info *v9ses; 742bd238fb4SLatchesar Ionkov struct p9_fid *dfid, *fid; 7432bad8471SEric Van Hensbergen struct inode *inode; 7447880b43bSAl Viro const unsigned char *name; 7452bad8471SEric Van Hensbergen 7464b8e9923SAl Viro p9_debug(P9_DEBUG_VFS, "dir: %p dentry: (%pd) %p flags: %x\n", 7474b8e9923SAl Viro dir, dentry, dentry, flags); 7482bad8471SEric Van Hensbergen 74911e9b49bSSripathi Kodi if (dentry->d_name.len > NAME_MAX) 75011e9b49bSSripathi Kodi return ERR_PTR(-ENAMETOOLONG); 75111e9b49bSSripathi Kodi 7522bad8471SEric Van Hensbergen v9ses = v9fs_inode2v9ses(dir); 753a534c8d1SAneesh Kumar K.V /* We can walk d_parent because we hold the dir->i_mutex */ 75477d5a6b7SAl Viro dfid = v9fs_parent_fid(dentry); 755bd238fb4SLatchesar Ionkov if (IS_ERR(dfid)) 756e231c2eeSDavid Howells return ERR_CAST(dfid); 7572bad8471SEric Van Hensbergen 75873f50717SAneesh Kumar K.V /* 75973f50717SAneesh Kumar K.V * Make sure we don't use a wrong inode due to parallel 76073f50717SAneesh Kumar K.V * unlink. For cached mode create calls request for new 76173f50717SAneesh Kumar K.V * inode. But with cache disabled, lookup should do this. 76273f50717SAneesh Kumar K.V */ 763500e2ab6SAl Viro name = dentry->d_name.name; 764500e2ab6SAl Viro fid = p9_client_walk(dfid, 1, &name, 1); 765b48dbb99SDominique Martinet p9_fid_put(dfid); 766500e2ab6SAl Viro if (fid == ERR_PTR(-ENOENT)) 767500e2ab6SAl Viro inode = NULL; 768500e2ab6SAl Viro else if (IS_ERR(fid)) 769500e2ab6SAl Viro inode = ERR_CAST(fid); 770*4eb31178SEric Van Hensbergen else if (v9ses->cache & (CACHE_META|CACHE_LOOSE)) 771a78ce05dSAneesh Kumar K.V inode = v9fs_get_inode_from_fid(v9ses, fid, dir->i_sb); 77273f50717SAneesh Kumar K.V else 77373f50717SAneesh Kumar K.V inode = v9fs_get_new_inode_from_fid(v9ses, fid, dir->i_sb); 77473f50717SAneesh Kumar K.V /* 77573f50717SAneesh Kumar K.V * If we had a rename on the server and a parallel lookup 77673f50717SAneesh Kumar K.V * for the new name, then make sure we instantiate with 77773f50717SAneesh Kumar K.V * the new name. ie look up for a/b, while on server somebody 77873f50717SAneesh Kumar K.V * moved b under k and client parallely did a lookup for 77973f50717SAneesh Kumar K.V * k/b. 78073f50717SAneesh Kumar K.V */ 78141d28bcaSAl Viro res = d_splice_alias(inode, dentry); 782500e2ab6SAl Viro if (!IS_ERR(fid)) { 783a3b2157eSAl Viro if (!res) 784dafbe689SDominique Martinet v9fs_fid_add(dentry, &fid); 785a3b2157eSAl Viro else if (!IS_ERR(res)) 786dafbe689SDominique Martinet v9fs_fid_add(res, &fid); 787a3b2157eSAl Viro else 788b48dbb99SDominique Martinet p9_fid_put(fid); 789500e2ab6SAl Viro } 7907b5be621SAl Viro return res; 7912bad8471SEric Van Hensbergen } 7922bad8471SEric Van Hensbergen 793d9585277SAl Viro static int 794e43ae79cSMiklos Szeredi v9fs_vfs_atomic_open(struct inode *dir, struct dentry *dentry, 7956e195b0fSDominique Martinet struct file *file, unsigned int flags, umode_t mode) 796e43ae79cSMiklos Szeredi { 797e43ae79cSMiklos Szeredi int err; 798e43ae79cSMiklos Szeredi u32 perm; 799*4eb31178SEric Van Hensbergen struct v9fs_inode __maybe_unused *v9inode; 800e43ae79cSMiklos Szeredi struct v9fs_session_info *v9ses; 8011543b4c5SEric Van Hensbergen struct p9_fid *fid; 802e43ae79cSMiklos Szeredi struct dentry *res = NULL; 803987a6485SGreg Kurz struct inode *inode; 8041543b4c5SEric Van Hensbergen int p9_omode; 805e43ae79cSMiklos Szeredi 80600699ad8SAl Viro if (d_in_lookup(dentry)) { 80700cd8dd3SAl Viro res = v9fs_vfs_lookup(dir, dentry, 0); 808e43ae79cSMiklos Szeredi if (IS_ERR(res)) 809d9585277SAl Viro return PTR_ERR(res); 810e43ae79cSMiklos Szeredi 811e43ae79cSMiklos Szeredi if (res) 812e43ae79cSMiklos Szeredi dentry = res; 813e43ae79cSMiklos Szeredi } 814e43ae79cSMiklos Szeredi 815e43ae79cSMiklos Szeredi /* Only creates */ 8162b0143b5SDavid Howells if (!(flags & O_CREAT) || d_really_is_positive(dentry)) 817e45198a6SAl Viro return finish_no_open(file, res); 818e43ae79cSMiklos Szeredi 819e43ae79cSMiklos Szeredi err = 0; 820fae74696SGeyslan G. Bem 821e43ae79cSMiklos Szeredi v9ses = v9fs_inode2v9ses(dir); 822e43ae79cSMiklos Szeredi perm = unixmode2p9mode(v9ses, mode); 8231543b4c5SEric Van Hensbergen p9_omode = v9fs_uflags2omode(flags, v9fs_proto_dotu(v9ses)); 8241543b4c5SEric Van Hensbergen 825*4eb31178SEric Van Hensbergen if ((v9ses->cache & CACHE_WRITEBACK) && (p9_omode & P9_OWRITE)) { 8261543b4c5SEric Van Hensbergen p9_omode = (p9_omode & !P9_OWRITE) | P9_ORDWR; 8271543b4c5SEric Van Hensbergen p9_debug(P9_DEBUG_CACHE, 8281543b4c5SEric Van Hensbergen "write-only file with writeback enabled, creating w/ O_RDWR\n"); 8291543b4c5SEric Van Hensbergen } 8301543b4c5SEric Van Hensbergen fid = v9fs_create(v9ses, dir, dentry, NULL, perm, p9_omode); 831e43ae79cSMiklos Szeredi if (IS_ERR(fid)) { 832e43ae79cSMiklos Szeredi err = PTR_ERR(fid); 833e43ae79cSMiklos Szeredi goto error; 834e43ae79cSMiklos Szeredi } 835e43ae79cSMiklos Szeredi 836e43ae79cSMiklos Szeredi v9fs_invalidate_inode_attr(dir); 837987a6485SGreg Kurz inode = d_inode(dentry); 838987a6485SGreg Kurz v9inode = V9FS_I(inode); 839be12af3eSAl Viro err = finish_open(file, dentry, generic_file_open); 84030d90494SAl Viro if (err) 841e43ae79cSMiklos Szeredi goto error; 842e43ae79cSMiklos Szeredi 84330d90494SAl Viro file->private_data = fid; 844*4eb31178SEric Van Hensbergen #ifdef CONFIG_9P_FSCACHE 845*4eb31178SEric Van Hensbergen if (v9ses->cache & CACHE_FSCACHE) 84624e42e32SDavid Howells fscache_use_cookie(v9fs_inode_cookie(v9inode), 84724e42e32SDavid Howells file->f_mode & FMODE_WRITE); 848*4eb31178SEric Van Hensbergen #endif 8491543b4c5SEric Van Hensbergen 8501543b4c5SEric Van Hensbergen v9fs_fid_add_modes(fid, v9ses->flags, v9ses->cache, file->f_flags); 851dafbe689SDominique Martinet v9fs_open_fid_add(inode, &fid); 852e43ae79cSMiklos Szeredi 85373a09dd9SAl Viro file->f_mode |= FMODE_CREATED; 854e43ae79cSMiklos Szeredi out: 855e43ae79cSMiklos Szeredi dput(res); 856d9585277SAl Viro return err; 857e43ae79cSMiklos Szeredi 858e43ae79cSMiklos Szeredi error: 859b48dbb99SDominique Martinet p9_fid_put(fid); 860e43ae79cSMiklos Szeredi goto out; 861e43ae79cSMiklos Szeredi } 862e43ae79cSMiklos Szeredi 8632bad8471SEric Van Hensbergen /** 8642bad8471SEric Van Hensbergen * v9fs_vfs_unlink - VFS unlink hook to delete an inode 8652bad8471SEric Van Hensbergen * @i: inode that is being unlinked 86673c592b9SEric Van Hensbergen * @d: dentry that is being unlinked 8672bad8471SEric Van Hensbergen * 8682bad8471SEric Van Hensbergen */ 8692bad8471SEric Van Hensbergen 87053c06f4eSAneesh Kumar K.V int v9fs_vfs_unlink(struct inode *i, struct dentry *d) 8712bad8471SEric Van Hensbergen { 8722bad8471SEric Van Hensbergen return v9fs_remove(i, d, 0); 8732bad8471SEric Van Hensbergen } 8742bad8471SEric Van Hensbergen 8752bad8471SEric Van Hensbergen /** 8762bad8471SEric Van Hensbergen * v9fs_vfs_rmdir - VFS unlink hook to delete a directory 8772bad8471SEric Van Hensbergen * @i: inode that is being unlinked 87873c592b9SEric Van Hensbergen * @d: dentry that is being unlinked 8792bad8471SEric Van Hensbergen * 8802bad8471SEric Van Hensbergen */ 8812bad8471SEric Van Hensbergen 88253c06f4eSAneesh Kumar K.V int v9fs_vfs_rmdir(struct inode *i, struct dentry *d) 8832bad8471SEric Van Hensbergen { 88448e370ffSAneesh Kumar K.V return v9fs_remove(i, d, AT_REMOVEDIR); 8852bad8471SEric Van Hensbergen } 8862bad8471SEric Van Hensbergen 8872bad8471SEric Van Hensbergen /** 8882bad8471SEric Van Hensbergen * v9fs_vfs_rename - VFS hook to rename an inode 889e18275aeSChristian Brauner * @idmap: The idmap of the mount 8902bad8471SEric Van Hensbergen * @old_dir: old dir inode 8912bad8471SEric Van Hensbergen * @old_dentry: old dentry 8922bad8471SEric Van Hensbergen * @new_dir: new dir inode 8932bad8471SEric Van Hensbergen * @new_dentry: new dentry 894bc868036SDavid Howells * @flags: RENAME_* flags 8952bad8471SEric Van Hensbergen * 8962bad8471SEric Van Hensbergen */ 8972bad8471SEric Van Hensbergen 89853c06f4eSAneesh Kumar K.V int 899e18275aeSChristian Brauner v9fs_vfs_rename(struct mnt_idmap *idmap, struct inode *old_dir, 900549c7297SChristian Brauner struct dentry *old_dentry, struct inode *new_dir, 901549c7297SChristian Brauner struct dentry *new_dentry, unsigned int flags) 9022bad8471SEric Van Hensbergen { 903d28c61f0SAneesh Kumar K.V int retval; 904bd238fb4SLatchesar Ionkov struct inode *old_inode; 905b271ec47SAneesh Kumar K.V struct inode *new_inode; 906bd238fb4SLatchesar Ionkov struct v9fs_session_info *v9ses; 907dafbe689SDominique Martinet struct p9_fid *oldfid = NULL, *dfid = NULL; 908dafbe689SDominique Martinet struct p9_fid *olddirfid = NULL; 909dafbe689SDominique Martinet struct p9_fid *newdirfid = NULL; 910bd238fb4SLatchesar Ionkov struct p9_wstat wstat; 9112bad8471SEric Van Hensbergen 9121cd66c93SMiklos Szeredi if (flags) 9131cd66c93SMiklos Szeredi return -EINVAL; 9141cd66c93SMiklos Szeredi 9155d385153SJoe Perches p9_debug(P9_DEBUG_VFS, "\n"); 916bd238fb4SLatchesar Ionkov retval = 0; 9172b0143b5SDavid Howells old_inode = d_inode(old_dentry); 9182b0143b5SDavid Howells new_inode = d_inode(new_dentry); 919bd238fb4SLatchesar Ionkov v9ses = v9fs_inode2v9ses(old_inode); 920bd238fb4SLatchesar Ionkov oldfid = v9fs_fid_lookup(old_dentry); 921da977b2cSEric Van Hensbergen if (IS_ERR(oldfid)) 922da977b2cSEric Van Hensbergen return PTR_ERR(oldfid); 923da977b2cSEric Van Hensbergen 9246636b6dcSJianyong Wu dfid = v9fs_parent_fid(old_dentry); 9256636b6dcSJianyong Wu olddirfid = clone_fid(dfid); 926b48dbb99SDominique Martinet p9_fid_put(dfid); 927dafbe689SDominique Martinet dfid = NULL; 9286636b6dcSJianyong Wu 929da977b2cSEric Van Hensbergen if (IS_ERR(olddirfid)) { 930da977b2cSEric Van Hensbergen retval = PTR_ERR(olddirfid); 931dafbe689SDominique Martinet goto error; 932da977b2cSEric Van Hensbergen } 933da977b2cSEric Van Hensbergen 9346636b6dcSJianyong Wu dfid = v9fs_parent_fid(new_dentry); 9356636b6dcSJianyong Wu newdirfid = clone_fid(dfid); 936b48dbb99SDominique Martinet p9_fid_put(dfid); 937dafbe689SDominique Martinet dfid = NULL; 9386636b6dcSJianyong Wu 939da977b2cSEric Van Hensbergen if (IS_ERR(newdirfid)) { 940da977b2cSEric Van Hensbergen retval = PTR_ERR(newdirfid); 941dafbe689SDominique Martinet goto error; 9422bad8471SEric Van Hensbergen } 9432bad8471SEric Van Hensbergen 944a534c8d1SAneesh Kumar K.V down_write(&v9ses->rename_sem); 9454681dbdaSSripathi Kodi if (v9fs_proto_dotl(v9ses)) { 9469e8fb38eSAneesh Kumar K.V retval = p9_client_renameat(olddirfid, old_dentry->d_name.name, 9479e8fb38eSAneesh Kumar K.V newdirfid, new_dentry->d_name.name); 9489e8fb38eSAneesh Kumar K.V if (retval == -EOPNOTSUPP) 9494681dbdaSSripathi Kodi retval = p9_client_rename(oldfid, newdirfid, 9509e8fb38eSAneesh Kumar K.V new_dentry->d_name.name); 9519e8fb38eSAneesh Kumar K.V if (retval != -EOPNOTSUPP) 952dafbe689SDominique Martinet goto error_locked; 9534681dbdaSSripathi Kodi } 954a534c8d1SAneesh Kumar K.V if (old_dentry->d_parent != new_dentry->d_parent) { 955a534c8d1SAneesh Kumar K.V /* 956a534c8d1SAneesh Kumar K.V * 9P .u can only handle file rename in the same directory 957a534c8d1SAneesh Kumar K.V */ 9584681dbdaSSripathi Kodi 9595d385153SJoe Perches p9_debug(P9_DEBUG_ERROR, "old dir and new dir are different\n"); 960621997cdSEric Van Hensbergen retval = -EXDEV; 961dafbe689SDominique Martinet goto error_locked; 9622bad8471SEric Van Hensbergen } 963531b1094SLatchesar Ionkov v9fs_blank_wstat(&wstat); 964ba17674fSLatchesar Ionkov wstat.muid = v9ses->uname; 9657880b43bSAl Viro wstat.name = new_dentry->d_name.name; 966bd238fb4SLatchesar Ionkov retval = p9_client_wstat(oldfid, &wstat); 9672bad8471SEric Van Hensbergen 968dafbe689SDominique Martinet error_locked: 969b271ec47SAneesh Kumar K.V if (!retval) { 970b271ec47SAneesh Kumar K.V if (new_inode) { 971b271ec47SAneesh Kumar K.V if (S_ISDIR(new_inode->i_mode)) 972b271ec47SAneesh Kumar K.V clear_nlink(new_inode); 973b271ec47SAneesh Kumar K.V else 974ac89b2efSEryu Guan v9fs_dec_count(new_inode); 975b271ec47SAneesh Kumar K.V } 976b271ec47SAneesh Kumar K.V if (S_ISDIR(old_inode->i_mode)) { 977b271ec47SAneesh Kumar K.V if (!new_inode) 978b271ec47SAneesh Kumar K.V inc_nlink(new_dir); 979ac89b2efSEryu Guan v9fs_dec_count(old_dir); 980b271ec47SAneesh Kumar K.V } 9813bc86de3SAneesh Kumar K.V v9fs_invalidate_inode_attr(old_inode); 982d28c61f0SAneesh Kumar K.V v9fs_invalidate_inode_attr(old_dir); 983d28c61f0SAneesh Kumar K.V v9fs_invalidate_inode_attr(new_dir); 9843bc86de3SAneesh Kumar K.V 985a534c8d1SAneesh Kumar K.V /* successful rename */ 986a534c8d1SAneesh Kumar K.V d_move(old_dentry, new_dentry); 987b271ec47SAneesh Kumar K.V } 988a534c8d1SAneesh Kumar K.V up_write(&v9ses->rename_sem); 989dafbe689SDominique Martinet 990dafbe689SDominique Martinet error: 991b48dbb99SDominique Martinet p9_fid_put(newdirfid); 992b48dbb99SDominique Martinet p9_fid_put(olddirfid); 993b48dbb99SDominique Martinet p9_fid_put(oldfid); 9942bad8471SEric Van Hensbergen return retval; 9952bad8471SEric Van Hensbergen } 9962bad8471SEric Van Hensbergen 9972bad8471SEric Van Hensbergen /** 998943ffb58SAdrian Bunk * v9fs_vfs_getattr - retrieve file metadata 999b74d24f7SChristian Brauner * @idmap: idmap of the mount 1000a528d35eSDavid Howells * @path: Object to query 1001ee443996SEric Van Hensbergen * @stat: metadata structure to populate 1002a528d35eSDavid Howells * @request_mask: Mask of STATX_xxx flags indicating the caller's interests 1003a528d35eSDavid Howells * @flags: AT_STATX_xxx setting 10042bad8471SEric Van Hensbergen * 10052bad8471SEric Van Hensbergen */ 10062bad8471SEric Van Hensbergen 10072bad8471SEric Van Hensbergen static int 1008b74d24f7SChristian Brauner v9fs_vfs_getattr(struct mnt_idmap *idmap, const struct path *path, 1009549c7297SChristian Brauner struct kstat *stat, u32 request_mask, unsigned int flags) 10102bad8471SEric Van Hensbergen { 1011a528d35eSDavid Howells struct dentry *dentry = path->dentry; 1012d9bc0d11SEric Van Hensbergen struct inode *inode = d_inode(dentry); 1013bd238fb4SLatchesar Ionkov struct v9fs_session_info *v9ses; 1014bd238fb4SLatchesar Ionkov struct p9_fid *fid; 101551a87c55SEric Van Hensbergen struct p9_wstat *st; 10162bad8471SEric Van Hensbergen 10175d385153SJoe Perches p9_debug(P9_DEBUG_VFS, "dentry: %p\n", dentry); 101842869c8aSAneesh Kumar K.V v9ses = v9fs_dentry2v9ses(dentry); 1019*4eb31178SEric Van Hensbergen if (v9ses->cache & (CACHE_META|CACHE_LOOSE)) { 10201543b4c5SEric Van Hensbergen generic_fillattr(&nop_mnt_idmap, inode, stat); 1021a1211908SAneesh Kumar K.V return 0; 1022*4eb31178SEric Van Hensbergen } else if (v9ses->cache & CACHE_WRITEBACK) { 1023d9bc0d11SEric Van Hensbergen if (S_ISREG(inode->i_mode)) { 1024d9bc0d11SEric Van Hensbergen int retval = filemap_fdatawrite(inode->i_mapping); 1025d9bc0d11SEric Van Hensbergen 1026d9bc0d11SEric Van Hensbergen if (retval) 1027d9bc0d11SEric Van Hensbergen p9_debug(P9_DEBUG_ERROR, 1028d9bc0d11SEric Van Hensbergen "flushing writeback during getattr returned %d\n", retval); 1029d9bc0d11SEric Van Hensbergen } 1030a1211908SAneesh Kumar K.V } 1031bd238fb4SLatchesar Ionkov fid = v9fs_fid_lookup(dentry); 1032da977b2cSEric Van Hensbergen if (IS_ERR(fid)) 1033da977b2cSEric Van Hensbergen return PTR_ERR(fid); 10342bad8471SEric Van Hensbergen 1035bd238fb4SLatchesar Ionkov st = p9_client_stat(fid); 1036b48dbb99SDominique Martinet p9_fid_put(fid); 1037bd238fb4SLatchesar Ionkov if (IS_ERR(st)) 1038bd238fb4SLatchesar Ionkov return PTR_ERR(st); 10392bad8471SEric Van Hensbergen 10405e3cc1eeSHou Tao v9fs_stat2inode(st, d_inode(dentry), dentry->d_sb, 0); 1041b74d24f7SChristian Brauner generic_fillattr(&nop_mnt_idmap, d_inode(dentry), stat); 10422bad8471SEric Van Hensbergen 104362b2be59SLatchesar Ionkov p9stat_free(st); 1044bd238fb4SLatchesar Ionkov kfree(st); 1045bd238fb4SLatchesar Ionkov return 0; 10462bad8471SEric Van Hensbergen } 10472bad8471SEric Van Hensbergen 10482bad8471SEric Van Hensbergen /** 10492bad8471SEric Van Hensbergen * v9fs_vfs_setattr - set file metadata 1050c1632a0fSChristian Brauner * @idmap: idmap of the mount 10512bad8471SEric Van Hensbergen * @dentry: file whose metadata to set 10522bad8471SEric Van Hensbergen * @iattr: metadata assignment structure 10532bad8471SEric Van Hensbergen * 10542bad8471SEric Van Hensbergen */ 10552bad8471SEric Van Hensbergen 1056c1632a0fSChristian Brauner static int v9fs_vfs_setattr(struct mnt_idmap *idmap, 1057549c7297SChristian Brauner struct dentry *dentry, struct iattr *iattr) 10582bad8471SEric Van Hensbergen { 10596636b6dcSJianyong Wu int retval, use_dentry = 0; 106024e42e32SDavid Howells struct inode *inode = d_inode(dentry); 1061bd238fb4SLatchesar Ionkov struct v9fs_session_info *v9ses; 106266246641SJianyong Wu struct p9_fid *fid = NULL; 1063bd238fb4SLatchesar Ionkov struct p9_wstat wstat; 10642bad8471SEric Van Hensbergen 10655d385153SJoe Perches p9_debug(P9_DEBUG_VFS, "\n"); 1066c1632a0fSChristian Brauner retval = setattr_prepare(&nop_mnt_idmap, dentry, iattr); 1067059c138bSAneesh Kumar K.V if (retval) 1068059c138bSAneesh Kumar K.V return retval; 1069059c138bSAneesh Kumar K.V 1070bd238fb4SLatchesar Ionkov retval = -EPERM; 107142869c8aSAneesh Kumar K.V v9ses = v9fs_dentry2v9ses(dentry); 107266246641SJianyong Wu if (iattr->ia_valid & ATTR_FILE) { 107366246641SJianyong Wu fid = iattr->ia_file->private_data; 107466246641SJianyong Wu WARN_ON(!fid); 107566246641SJianyong Wu } 10766636b6dcSJianyong Wu if (!fid) { 1077bd238fb4SLatchesar Ionkov fid = v9fs_fid_lookup(dentry); 10786636b6dcSJianyong Wu use_dentry = 1; 10796636b6dcSJianyong Wu } 1080da977b2cSEric Van Hensbergen if (IS_ERR(fid)) 1081da977b2cSEric Van Hensbergen return PTR_ERR(fid); 10822bad8471SEric Van Hensbergen 1083531b1094SLatchesar Ionkov v9fs_blank_wstat(&wstat); 10842bad8471SEric Van Hensbergen if (iattr->ia_valid & ATTR_MODE) 1085531b1094SLatchesar Ionkov wstat.mode = unixmode2p9mode(v9ses, iattr->ia_mode); 10862bad8471SEric Van Hensbergen 10872bad8471SEric Van Hensbergen if (iattr->ia_valid & ATTR_MTIME) 1088531b1094SLatchesar Ionkov wstat.mtime = iattr->ia_mtime.tv_sec; 10892bad8471SEric Van Hensbergen 10902bad8471SEric Van Hensbergen if (iattr->ia_valid & ATTR_ATIME) 1091531b1094SLatchesar Ionkov wstat.atime = iattr->ia_atime.tv_sec; 10922bad8471SEric Van Hensbergen 10932bad8471SEric Van Hensbergen if (iattr->ia_valid & ATTR_SIZE) 1094531b1094SLatchesar Ionkov wstat.length = iattr->ia_size; 10952bad8471SEric Van Hensbergen 1096dd6102fbSSripathi Kodi if (v9fs_proto_dotu(v9ses)) { 1097531b1094SLatchesar Ionkov if (iattr->ia_valid & ATTR_UID) 1098531b1094SLatchesar Ionkov wstat.n_uid = iattr->ia_uid; 10992bad8471SEric Van Hensbergen 1100531b1094SLatchesar Ionkov if (iattr->ia_valid & ATTR_GID) 1101531b1094SLatchesar Ionkov wstat.n_gid = iattr->ia_gid; 11022bad8471SEric Van Hensbergen } 1103059c138bSAneesh Kumar K.V 11043dc5436aSAneesh Kumar K.V /* Write all dirty data */ 1105d9bc0d11SEric Van Hensbergen if (d_is_reg(dentry)) { 1106d9bc0d11SEric Van Hensbergen retval = filemap_fdatawrite(inode->i_mapping); 1107d9bc0d11SEric Van Hensbergen if (retval) 1108d9bc0d11SEric Van Hensbergen p9_debug(P9_DEBUG_ERROR, 1109d9bc0d11SEric Van Hensbergen "flushing writeback during setattr returned %d\n", retval); 1110d9bc0d11SEric Van Hensbergen } 11113dc5436aSAneesh Kumar K.V 1112f10fc50fSAneesh Kumar K.V retval = p9_client_wstat(fid, &wstat); 11136636b6dcSJianyong Wu 11146636b6dcSJianyong Wu if (use_dentry) 1115b48dbb99SDominique Martinet p9_fid_put(fid); 11166636b6dcSJianyong Wu 1117f10fc50fSAneesh Kumar K.V if (retval < 0) 1118f10fc50fSAneesh Kumar K.V return retval; 1119059c138bSAneesh Kumar K.V 1120059c138bSAneesh Kumar K.V if ((iattr->ia_valid & ATTR_SIZE) && 112124e42e32SDavid Howells iattr->ia_size != i_size_read(inode)) { 112224e42e32SDavid Howells truncate_setsize(inode, iattr->ia_size); 11231543b4c5SEric Van Hensbergen truncate_pagecache(inode, iattr->ia_size); 11241543b4c5SEric Van Hensbergen 1125*4eb31178SEric Van Hensbergen #ifdef CONFIG_9P_FSCACHE 1126*4eb31178SEric Van Hensbergen if (v9ses->cache & CACHE_FSCACHE) { 1127*4eb31178SEric Van Hensbergen struct v9fs_inode *v9inode = V9FS_I(inode); 1128*4eb31178SEric Van Hensbergen 112924e42e32SDavid Howells fscache_resize_cookie(v9fs_inode_cookie(v9inode), iattr->ia_size); 113024e42e32SDavid Howells } 1131*4eb31178SEric Van Hensbergen #endif 1132*4eb31178SEric Van Hensbergen } 1133059c138bSAneesh Kumar K.V 113424e42e32SDavid Howells v9fs_invalidate_inode_attr(inode); 11351025774cSChristoph Hellwig 1136c1632a0fSChristian Brauner setattr_copy(&nop_mnt_idmap, inode, iattr); 113724e42e32SDavid Howells mark_inode_dirty(inode); 11381025774cSChristoph Hellwig return 0; 11392bad8471SEric Van Hensbergen } 11402bad8471SEric Van Hensbergen 11412bad8471SEric Van Hensbergen /** 1142531b1094SLatchesar Ionkov * v9fs_stat2inode - populate an inode structure with mistat info 1143531b1094SLatchesar Ionkov * @stat: Plan 9 metadata (mistat) structure 11442bad8471SEric Van Hensbergen * @inode: inode to populate 11452bad8471SEric Van Hensbergen * @sb: superblock of filesystem 11465e3cc1eeSHou Tao * @flags: control flags (e.g. V9FS_STAT2INODE_KEEP_ISIZE) 11472bad8471SEric Van Hensbergen * 11482bad8471SEric Van Hensbergen */ 11492bad8471SEric Van Hensbergen 11502bad8471SEric Van Hensbergen void 115151a87c55SEric Van Hensbergen v9fs_stat2inode(struct p9_wstat *stat, struct inode *inode, 11525e3cc1eeSHou Tao struct super_block *sb, unsigned int flags) 11532bad8471SEric Van Hensbergen { 11543eda0de6SAl Viro umode_t mode; 11552bad8471SEric Van Hensbergen struct v9fs_session_info *v9ses = sb->s_fs_info; 1156b3cbea03SAneesh Kumar K.V struct v9fs_inode *v9inode = V9FS_I(inode); 11572bad8471SEric Van Hensbergen 1158bfe86848SMiklos Szeredi set_nlink(inode, 1); 11592bad8471SEric Van Hensbergen 1160531b1094SLatchesar Ionkov inode->i_atime.tv_sec = stat->atime; 1161531b1094SLatchesar Ionkov inode->i_mtime.tv_sec = stat->mtime; 1162531b1094SLatchesar Ionkov inode->i_ctime.tv_sec = stat->mtime; 11632bad8471SEric Van Hensbergen 1164bd32b82dSLatchesar Ionkov inode->i_uid = v9ses->dfltuid; 1165bd32b82dSLatchesar Ionkov inode->i_gid = v9ses->dfltgid; 11662bad8471SEric Van Hensbergen 1167dd6102fbSSripathi Kodi if (v9fs_proto_dotu(v9ses)) { 1168531b1094SLatchesar Ionkov inode->i_uid = stat->n_uid; 1169531b1094SLatchesar Ionkov inode->i_gid = stat->n_gid; 1170531b1094SLatchesar Ionkov } 11715717144aSAneesh Kumar K.V if ((S_ISREG(inode->i_mode)) || (S_ISDIR(inode->i_mode))) { 11729652c732SAl Viro if (v9fs_proto_dotu(v9ses)) { 11739652c732SAl Viro unsigned int i_nlink; 11745717144aSAneesh Kumar K.V /* 11759652c732SAl Viro * Hadlink support got added later to the .u extension. 11769652c732SAl Viro * So there can be a server out there that doesn't 11779652c732SAl Viro * support this even with .u extension. That would 11789652c732SAl Viro * just leave us with stat->extension being an empty 11799652c732SAl Viro * string, though. 11805717144aSAneesh Kumar K.V */ 11815717144aSAneesh Kumar K.V /* HARDLINKCOUNT %u */ 11829652c732SAl Viro if (sscanf(stat->extension, 11839652c732SAl Viro " HARDLINKCOUNT %u", &i_nlink) == 1) 1184bfe86848SMiklos Szeredi set_nlink(inode, i_nlink); 11855717144aSAneesh Kumar K.V } 11865717144aSAneesh Kumar K.V } 1187df345c67SAneesh Kumar K.V mode = p9mode2perm(v9ses, stat); 118845089142SAneesh Kumar K.V mode |= inode->i_mode & ~S_IALLUGO; 118945089142SAneesh Kumar K.V inode->i_mode = mode; 11902bad8471SEric Van Hensbergen 11915e3cc1eeSHou Tao if (!(flags & V9FS_STAT2INODE_KEEP_ISIZE)) 11925e3cc1eeSHou Tao v9fs_i_size_write(inode, stat->length); 1193bd238fb4SLatchesar Ionkov /* not real number of blocks, but 512 byte ones ... */ 11945e3cc1eeSHou Tao inode->i_blocks = (stat->length + 512 - 1) >> 9; 1195b3cbea03SAneesh Kumar K.V v9inode->cache_validity &= ~V9FS_INO_INVALID_ATTR; 11962bad8471SEric Van Hensbergen } 11972bad8471SEric Van Hensbergen 11982bad8471SEric Van Hensbergen /** 11992bad8471SEric Van Hensbergen * v9fs_qid2ino - convert qid into inode number 12002bad8471SEric Van Hensbergen * @qid: qid to hash 12012bad8471SEric Van Hensbergen * 12022bad8471SEric Van Hensbergen * BUG: potential for inode number collisions? 12032bad8471SEric Van Hensbergen */ 12042bad8471SEric Van Hensbergen 1205bd238fb4SLatchesar Ionkov ino_t v9fs_qid2ino(struct p9_qid *qid) 12062bad8471SEric Van Hensbergen { 12072bad8471SEric Van Hensbergen u64 path = qid->path + 2; 12082bad8471SEric Van Hensbergen ino_t i = 0; 12092bad8471SEric Van Hensbergen 12102bad8471SEric Van Hensbergen if (sizeof(ino_t) == sizeof(path)) 12112bad8471SEric Van Hensbergen memcpy(&i, &path, sizeof(ino_t)); 12122bad8471SEric Van Hensbergen else 12132bad8471SEric Van Hensbergen i = (ino_t) (path ^ (path >> 32)); 12142bad8471SEric Van Hensbergen 12152bad8471SEric Van Hensbergen return i; 12162bad8471SEric Van Hensbergen } 12172bad8471SEric Van Hensbergen 12182bad8471SEric Van Hensbergen /** 12196b255391SAl Viro * v9fs_vfs_get_link - follow a symlink path 12202bad8471SEric Van Hensbergen * @dentry: dentry for symlink 12216b255391SAl Viro * @inode: inode for symlink 1222fceef393SAl Viro * @done: delayed call for when we are done with the return value 12232bad8471SEric Van Hensbergen */ 12242bad8471SEric Van Hensbergen 12256b255391SAl Viro static const char *v9fs_vfs_get_link(struct dentry *dentry, 1226fceef393SAl Viro struct inode *inode, 1227fceef393SAl Viro struct delayed_call *done) 12282bad8471SEric Van Hensbergen { 12296b255391SAl Viro struct v9fs_session_info *v9ses; 12306b255391SAl Viro struct p9_fid *fid; 123190e4fc88SAl Viro struct p9_wstat *st; 1232680baacbSAl Viro char *res; 12332bad8471SEric Van Hensbergen 12346b255391SAl Viro if (!dentry) 12356b255391SAl Viro return ERR_PTR(-ECHILD); 12366b255391SAl Viro 12376b255391SAl Viro v9ses = v9fs_dentry2v9ses(dentry); 1238e5690f26SDominique Martinet if (!v9fs_proto_dotu(v9ses)) 1239e5690f26SDominique Martinet return ERR_PTR(-EBADF); 1240e5690f26SDominique Martinet 12414b8e9923SAl Viro p9_debug(P9_DEBUG_VFS, "%pd\n", dentry); 1242e5690f26SDominique Martinet fid = v9fs_fid_lookup(dentry); 12432bad8471SEric Van Hensbergen 124490e4fc88SAl Viro if (IS_ERR(fid)) 124590e4fc88SAl Viro return ERR_CAST(fid); 12462bad8471SEric Van Hensbergen 124790e4fc88SAl Viro st = p9_client_stat(fid); 1248b48dbb99SDominique Martinet p9_fid_put(fid); 124990e4fc88SAl Viro if (IS_ERR(st)) 125090e4fc88SAl Viro return ERR_CAST(st); 125190e4fc88SAl Viro 125290e4fc88SAl Viro if (!(st->mode & P9_DMSYMLINK)) { 125390e4fc88SAl Viro p9stat_free(st); 125490e4fc88SAl Viro kfree(st); 125590e4fc88SAl Viro return ERR_PTR(-EINVAL); 12562bad8471SEric Van Hensbergen } 1257680baacbSAl Viro res = st->extension; 125890e4fc88SAl Viro st->extension = NULL; 1259680baacbSAl Viro if (strlen(res) >= PATH_MAX) 1260680baacbSAl Viro res[PATH_MAX - 1] = '\0'; 1261680baacbSAl Viro 126290e4fc88SAl Viro p9stat_free(st); 126390e4fc88SAl Viro kfree(st); 1264fceef393SAl Viro set_delayed_call(done, kfree_link, res); 1265fceef393SAl Viro return res; 12662bad8471SEric Van Hensbergen } 12672bad8471SEric Van Hensbergen 12682bad8471SEric Van Hensbergen /** 1269ee443996SEric Van Hensbergen * v9fs_vfs_mkspecial - create a special file 1270ee443996SEric Van Hensbergen * @dir: inode to create special file in 1271ee443996SEric Van Hensbergen * @dentry: dentry to create 1272fd2916bdSFabian Frederick * @perm: mode to create special file 1273ee443996SEric Van Hensbergen * @extension: 9p2000.u format extension string representing special file 1274ee443996SEric Van Hensbergen * 1275ee443996SEric Van Hensbergen */ 1276ee443996SEric Van Hensbergen 1277531b1094SLatchesar Ionkov static int v9fs_vfs_mkspecial(struct inode *dir, struct dentry *dentry, 1278c2837de7SAl Viro u32 perm, const char *extension) 1279531b1094SLatchesar Ionkov { 1280bd238fb4SLatchesar Ionkov struct p9_fid *fid; 1281d28c61f0SAneesh Kumar K.V struct v9fs_session_info *v9ses; 1282531b1094SLatchesar Ionkov 12836a3124a3SLatchesar Ionkov v9ses = v9fs_inode2v9ses(dir); 1284dd6102fbSSripathi Kodi if (!v9fs_proto_dotu(v9ses)) { 12855d385153SJoe Perches p9_debug(P9_DEBUG_ERROR, "not extended\n"); 12866a3124a3SLatchesar Ionkov return -EPERM; 1287531b1094SLatchesar Ionkov } 1288531b1094SLatchesar Ionkov 1289bd238fb4SLatchesar Ionkov fid = v9fs_create(v9ses, dir, dentry, (char *) extension, perm, 1290bd238fb4SLatchesar Ionkov P9_OREAD); 1291bd238fb4SLatchesar Ionkov if (IS_ERR(fid)) 1292bd238fb4SLatchesar Ionkov return PTR_ERR(fid); 1293da977b2cSEric Van Hensbergen 1294d28c61f0SAneesh Kumar K.V v9fs_invalidate_inode_attr(dir); 1295b48dbb99SDominique Martinet p9_fid_put(fid); 12966a3124a3SLatchesar Ionkov return 0; 1297531b1094SLatchesar Ionkov } 1298531b1094SLatchesar Ionkov 1299531b1094SLatchesar Ionkov /** 1300531b1094SLatchesar Ionkov * v9fs_vfs_symlink - helper function to create symlinks 13017a77db95SChristian Brauner * @idmap: idmap of the mount 1302531b1094SLatchesar Ionkov * @dir: directory inode containing symlink 1303531b1094SLatchesar Ionkov * @dentry: dentry for symlink 1304531b1094SLatchesar Ionkov * @symname: symlink data 1305531b1094SLatchesar Ionkov * 1306ee443996SEric Van Hensbergen * See Also: 9P2000.u RFC for more information 1307531b1094SLatchesar Ionkov * 1308531b1094SLatchesar Ionkov */ 1309531b1094SLatchesar Ionkov 1310531b1094SLatchesar Ionkov static int 13117a77db95SChristian Brauner v9fs_vfs_symlink(struct mnt_idmap *idmap, struct inode *dir, 1312549c7297SChristian Brauner struct dentry *dentry, const char *symname) 1313531b1094SLatchesar Ionkov { 13144b8e9923SAl Viro p9_debug(P9_DEBUG_VFS, " %lu,%pd,%s\n", 13154b8e9923SAl Viro dir->i_ino, dentry, symname); 1316531b1094SLatchesar Ionkov 1317c2837de7SAl Viro return v9fs_vfs_mkspecial(dir, dentry, P9_DMSYMLINK, symname); 1318531b1094SLatchesar Ionkov } 1319531b1094SLatchesar Ionkov 1320b46c267eSAl Viro #define U32_MAX_DIGITS 10 1321b46c267eSAl Viro 13222bad8471SEric Van Hensbergen /** 13232bad8471SEric Van Hensbergen * v9fs_vfs_link - create a hardlink 13242bad8471SEric Van Hensbergen * @old_dentry: dentry for file to link to 13252bad8471SEric Van Hensbergen * @dir: inode destination for new link 132673c592b9SEric Van Hensbergen * @dentry: dentry for link 13272bad8471SEric Van Hensbergen * 13282bad8471SEric Van Hensbergen */ 13292bad8471SEric Van Hensbergen 13302bad8471SEric Van Hensbergen static int 13312bad8471SEric Van Hensbergen v9fs_vfs_link(struct dentry *old_dentry, struct inode *dir, 13322bad8471SEric Van Hensbergen struct dentry *dentry) 13332bad8471SEric Van Hensbergen { 1334531b1094SLatchesar Ionkov int retval; 1335b46c267eSAl Viro char name[1 + U32_MAX_DIGITS + 2]; /* sign + number + \n + \0 */ 1336d28c61f0SAneesh Kumar K.V struct p9_fid *oldfid; 13372bad8471SEric Van Hensbergen 13384b8e9923SAl Viro p9_debug(P9_DEBUG_VFS, " %lu,%pd,%pd\n", 13394b8e9923SAl Viro dir->i_ino, dentry, old_dentry); 13402bad8471SEric Van Hensbergen 1341da977b2cSEric Van Hensbergen oldfid = v9fs_fid_clone(old_dentry); 1342da977b2cSEric Van Hensbergen if (IS_ERR(oldfid)) 1343da977b2cSEric Van Hensbergen return PTR_ERR(oldfid); 13442bad8471SEric Van Hensbergen 134516cce6d2SLatchesar Ionkov sprintf(name, "%d\n", oldfid->fid); 1346bd238fb4SLatchesar Ionkov retval = v9fs_vfs_mkspecial(dir, dentry, P9_DMLINK, name); 1347c06c066aSAneesh Kumar K.V if (!retval) { 13482b0143b5SDavid Howells v9fs_refresh_inode(oldfid, d_inode(old_dentry)); 1349d28c61f0SAneesh Kumar K.V v9fs_invalidate_inode_attr(dir); 1350c06c066aSAneesh Kumar K.V } 1351b48dbb99SDominique Martinet p9_fid_put(oldfid); 13522bad8471SEric Van Hensbergen return retval; 13532bad8471SEric Van Hensbergen } 13542bad8471SEric Van Hensbergen 13552bad8471SEric Van Hensbergen /** 13562bad8471SEric Van Hensbergen * v9fs_vfs_mknod - create a special file 13575ebb29beSChristian Brauner * @idmap: idmap of the mount 13582bad8471SEric Van Hensbergen * @dir: inode destination for new link 13592bad8471SEric Van Hensbergen * @dentry: dentry for file 13602bad8471SEric Van Hensbergen * @mode: mode for creation 1361ee443996SEric Van Hensbergen * @rdev: device associated with special file 13622bad8471SEric Van Hensbergen * 13632bad8471SEric Van Hensbergen */ 13642bad8471SEric Van Hensbergen 13652bad8471SEric Van Hensbergen static int 13665ebb29beSChristian Brauner v9fs_vfs_mknod(struct mnt_idmap *idmap, struct inode *dir, 1367549c7297SChristian Brauner struct dentry *dentry, umode_t mode, dev_t rdev) 13682bad8471SEric Van Hensbergen { 1369c2837de7SAl Viro struct v9fs_session_info *v9ses = v9fs_inode2v9ses(dir); 1370531b1094SLatchesar Ionkov int retval; 1371b46c267eSAl Viro char name[2 + U32_MAX_DIGITS + 1 + U32_MAX_DIGITS + 1]; 1372c2837de7SAl Viro u32 perm; 13732bad8471SEric Van Hensbergen 13746e195b0fSDominique Martinet p9_debug(P9_DEBUG_VFS, " %lu,%pd mode: %x MAJOR: %u MINOR: %u\n", 13754b8e9923SAl Viro dir->i_ino, dentry, mode, 13765d385153SJoe Perches MAJOR(rdev), MINOR(rdev)); 13772bad8471SEric Van Hensbergen 13782bad8471SEric Van Hensbergen /* build extension */ 13792bad8471SEric Van Hensbergen if (S_ISBLK(mode)) 1380531b1094SLatchesar Ionkov sprintf(name, "b %u %u", MAJOR(rdev), MINOR(rdev)); 13812bad8471SEric Van Hensbergen else if (S_ISCHR(mode)) 1382531b1094SLatchesar Ionkov sprintf(name, "c %u %u", MAJOR(rdev), MINOR(rdev)); 1383b46c267eSAl Viro else 1384531b1094SLatchesar Ionkov *name = 0; 13852bad8471SEric Van Hensbergen 1386c2837de7SAl Viro perm = unixmode2p9mode(v9ses, mode); 1387c2837de7SAl Viro retval = v9fs_vfs_mkspecial(dir, dentry, perm, name); 13882bad8471SEric Van Hensbergen 13892bad8471SEric Van Hensbergen return retval; 13902bad8471SEric Van Hensbergen } 13912bad8471SEric Van Hensbergen 1392b3cbea03SAneesh Kumar K.V int v9fs_refresh_inode(struct p9_fid *fid, struct inode *inode) 1393b3cbea03SAneesh Kumar K.V { 139445089142SAneesh Kumar K.V int umode; 139545089142SAneesh Kumar K.V dev_t rdev; 1396b3cbea03SAneesh Kumar K.V struct p9_wstat *st; 1397b3cbea03SAneesh Kumar K.V struct v9fs_session_info *v9ses; 13985e3cc1eeSHou Tao unsigned int flags; 1399b3cbea03SAneesh Kumar K.V 1400b3cbea03SAneesh Kumar K.V v9ses = v9fs_inode2v9ses(inode); 1401b3cbea03SAneesh Kumar K.V st = p9_client_stat(fid); 1402b3cbea03SAneesh Kumar K.V if (IS_ERR(st)) 1403b3cbea03SAneesh Kumar K.V return PTR_ERR(st); 140445089142SAneesh Kumar K.V /* 140545089142SAneesh Kumar K.V * Don't update inode if the file type is different 140645089142SAneesh Kumar K.V */ 140745089142SAneesh Kumar K.V umode = p9mode2unixmode(v9ses, st, &rdev); 14086e3e2c43SAl Viro if (inode_wrong_type(inode, umode)) 140945089142SAneesh Kumar K.V goto out; 1410b3cbea03SAneesh Kumar K.V 1411b3cbea03SAneesh Kumar K.V /* 1412b3cbea03SAneesh Kumar K.V * We don't want to refresh inode->i_size, 1413b3cbea03SAneesh Kumar K.V * because we may have cached data 1414b3cbea03SAneesh Kumar K.V */ 1415*4eb31178SEric Van Hensbergen flags = (v9ses->cache & CACHE_LOOSE) ? 14165e3cc1eeSHou Tao V9FS_STAT2INODE_KEEP_ISIZE : 0; 14175e3cc1eeSHou Tao v9fs_stat2inode(st, inode, inode->i_sb, flags); 141845089142SAneesh Kumar K.V out: 1419b3cbea03SAneesh Kumar K.V p9stat_free(st); 1420b3cbea03SAneesh Kumar K.V kfree(st); 1421b3cbea03SAneesh Kumar K.V return 0; 1422b3cbea03SAneesh Kumar K.V } 1423b3cbea03SAneesh Kumar K.V 14249b6533c9SSripathi Kodi static const struct inode_operations v9fs_dir_inode_operations_dotu = { 14259b6533c9SSripathi Kodi .create = v9fs_vfs_create, 14269b6533c9SSripathi Kodi .lookup = v9fs_vfs_lookup, 1427e43ae79cSMiklos Szeredi .atomic_open = v9fs_vfs_atomic_open, 14289b6533c9SSripathi Kodi .symlink = v9fs_vfs_symlink, 142950cc42ffSVenkateswararao Jujjuri (JV) .link = v9fs_vfs_link, 14309b6533c9SSripathi Kodi .unlink = v9fs_vfs_unlink, 14319b6533c9SSripathi Kodi .mkdir = v9fs_vfs_mkdir, 14329b6533c9SSripathi Kodi .rmdir = v9fs_vfs_rmdir, 14331d76e313SAneesh Kumar K.V .mknod = v9fs_vfs_mknod, 14349b6533c9SSripathi Kodi .rename = v9fs_vfs_rename, 14359b6533c9SSripathi Kodi .getattr = v9fs_vfs_getattr, 14369b6533c9SSripathi Kodi .setattr = v9fs_vfs_setattr, 14379b6533c9SSripathi Kodi }; 14389b6533c9SSripathi Kodi 1439754661f1SArjan van de Ven static const struct inode_operations v9fs_dir_inode_operations = { 1440b501611aSEric Van Hensbergen .create = v9fs_vfs_create, 1441b501611aSEric Van Hensbergen .lookup = v9fs_vfs_lookup, 1442e43ae79cSMiklos Szeredi .atomic_open = v9fs_vfs_atomic_open, 1443b501611aSEric Van Hensbergen .unlink = v9fs_vfs_unlink, 1444b501611aSEric Van Hensbergen .mkdir = v9fs_vfs_mkdir, 1445b501611aSEric Van Hensbergen .rmdir = v9fs_vfs_rmdir, 1446b501611aSEric Van Hensbergen .mknod = v9fs_vfs_mknod, 1447b501611aSEric Van Hensbergen .rename = v9fs_vfs_rename, 1448b501611aSEric Van Hensbergen .getattr = v9fs_vfs_getattr, 1449b501611aSEric Van Hensbergen .setattr = v9fs_vfs_setattr, 1450b501611aSEric Van Hensbergen }; 1451b501611aSEric Van Hensbergen 1452754661f1SArjan van de Ven static const struct inode_operations v9fs_file_inode_operations = { 14532bad8471SEric Van Hensbergen .getattr = v9fs_vfs_getattr, 14542bad8471SEric Van Hensbergen .setattr = v9fs_vfs_setattr, 14552bad8471SEric Van Hensbergen }; 14562bad8471SEric Van Hensbergen 1457754661f1SArjan van de Ven static const struct inode_operations v9fs_symlink_inode_operations = { 14586b255391SAl Viro .get_link = v9fs_vfs_get_link, 14592bad8471SEric Van Hensbergen .getattr = v9fs_vfs_getattr, 14602bad8471SEric Van Hensbergen .setattr = v9fs_vfs_setattr, 14612bad8471SEric Van Hensbergen }; 14629b6533c9SSripathi Kodi 1463