11f327613SThomas Gleixner // SPDX-License-Identifier: GPL-2.0-only 22bad8471SEric Van Hensbergen /* 373c592b9SEric Van Hensbergen * This file contains vfs inode ops for the 9P2000 protocol. 42bad8471SEric Van Hensbergen * 52bad8471SEric Van Hensbergen * Copyright (C) 2004 by Eric Van Hensbergen <ericvh@gmail.com> 62bad8471SEric Van Hensbergen * Copyright (C) 2002 by Ron Minnich <rminnich@lanl.gov> 72bad8471SEric Van Hensbergen */ 82bad8471SEric Van Hensbergen 95d385153SJoe Perches #define pr_fmt(fmt) KBUILD_MODNAME ": " fmt 105d385153SJoe Perches 112bad8471SEric Van Hensbergen #include <linux/module.h> 122bad8471SEric Van Hensbergen #include <linux/errno.h> 132bad8471SEric Van Hensbergen #include <linux/fs.h> 142bad8471SEric Van Hensbergen #include <linux/file.h> 152bad8471SEric Van Hensbergen #include <linux/pagemap.h> 162bad8471SEric Van Hensbergen #include <linux/stat.h> 172bad8471SEric Van Hensbergen #include <linux/string.h> 182bad8471SEric Van Hensbergen #include <linux/inet.h> 192bad8471SEric Van Hensbergen #include <linux/namei.h> 20e8edc6e0SAlexey Dobriyan #include <linux/sched.h> 215a0e3ad6STejun Heo #include <linux/slab.h> 22ebf46264SAneesh Kumar K.V #include <linux/xattr.h> 2385ff872dSAneesh Kumar K.V #include <linux/posix_acl.h> 24bd238fb4SLatchesar Ionkov #include <net/9p/9p.h> 25bd238fb4SLatchesar Ionkov #include <net/9p/client.h> 262bad8471SEric Van Hensbergen 272bad8471SEric Van Hensbergen #include "v9fs.h" 282bad8471SEric Van Hensbergen #include "v9fs_vfs.h" 292bad8471SEric Van Hensbergen #include "fid.h" 3060e78d2cSAbhishek Kulkarni #include "cache.h" 31ebf46264SAneesh Kumar K.V #include "xattr.h" 3285ff872dSAneesh Kumar K.V #include "acl.h" 332bad8471SEric Van Hensbergen 34754661f1SArjan van de Ven static const struct inode_operations v9fs_dir_inode_operations; 359b6533c9SSripathi Kodi static const struct inode_operations v9fs_dir_inode_operations_dotu; 36754661f1SArjan van de Ven static const struct inode_operations v9fs_file_inode_operations; 37754661f1SArjan van de Ven static const struct inode_operations v9fs_symlink_inode_operations; 38f5fc6145SAneesh Kumar K.V 392bad8471SEric Van Hensbergen /** 402bad8471SEric Van Hensbergen * unixmode2p9mode - convert unix mode bits to plan 9 412bad8471SEric Van Hensbergen * @v9ses: v9fs session information 422bad8471SEric Van Hensbergen * @mode: mode to convert 432bad8471SEric Van Hensbergen * 442bad8471SEric Van Hensbergen */ 452bad8471SEric Van Hensbergen 463eda0de6SAl Viro static u32 unixmode2p9mode(struct v9fs_session_info *v9ses, umode_t mode) 472bad8471SEric Van Hensbergen { 482bad8471SEric Van Hensbergen int res; 496e195b0fSDominique Martinet 502bad8471SEric Van Hensbergen res = mode & 0777; 512bad8471SEric Van Hensbergen if (S_ISDIR(mode)) 52bd238fb4SLatchesar Ionkov res |= P9_DMDIR; 53dd6102fbSSripathi Kodi if (v9fs_proto_dotu(v9ses)) { 542bad8471SEric Van Hensbergen if (v9ses->nodev == 0) { 552bad8471SEric Van Hensbergen if (S_ISSOCK(mode)) 56bd238fb4SLatchesar Ionkov res |= P9_DMSOCKET; 572bad8471SEric Van Hensbergen if (S_ISFIFO(mode)) 58bd238fb4SLatchesar Ionkov res |= P9_DMNAMEDPIPE; 592bad8471SEric Van Hensbergen if (S_ISBLK(mode)) 60bd238fb4SLatchesar Ionkov res |= P9_DMDEVICE; 612bad8471SEric Van Hensbergen if (S_ISCHR(mode)) 62bd238fb4SLatchesar Ionkov res |= P9_DMDEVICE; 632bad8471SEric Van Hensbergen } 642bad8471SEric Van Hensbergen 652bad8471SEric Van Hensbergen if ((mode & S_ISUID) == S_ISUID) 66bd238fb4SLatchesar Ionkov res |= P9_DMSETUID; 672bad8471SEric Van Hensbergen if ((mode & S_ISGID) == S_ISGID) 68bd238fb4SLatchesar Ionkov res |= P9_DMSETGID; 69d199d652SAnthony Liguori if ((mode & S_ISVTX) == S_ISVTX) 70d199d652SAnthony Liguori res |= P9_DMSETVTX; 712bad8471SEric Van Hensbergen } 722bad8471SEric Van Hensbergen return res; 732bad8471SEric Van Hensbergen } 742bad8471SEric Van Hensbergen 752bad8471SEric Van Hensbergen /** 76df345c67SAneesh Kumar K.V * p9mode2perm- convert plan9 mode bits to unix permission bits 77df345c67SAneesh Kumar K.V * @v9ses: v9fs session information 78df345c67SAneesh Kumar K.V * @stat: p9_wstat from which mode need to be derived 79df345c67SAneesh Kumar K.V * 80df345c67SAneesh Kumar K.V */ 81df345c67SAneesh Kumar K.V static int p9mode2perm(struct v9fs_session_info *v9ses, 82df345c67SAneesh Kumar K.V struct p9_wstat *stat) 83df345c67SAneesh Kumar K.V { 84df345c67SAneesh Kumar K.V int res; 85df345c67SAneesh Kumar K.V int mode = stat->mode; 86df345c67SAneesh Kumar K.V 87df345c67SAneesh Kumar K.V res = mode & S_IALLUGO; 88df345c67SAneesh Kumar K.V if (v9fs_proto_dotu(v9ses)) { 89df345c67SAneesh Kumar K.V if ((mode & P9_DMSETUID) == P9_DMSETUID) 90df345c67SAneesh Kumar K.V res |= S_ISUID; 91df345c67SAneesh Kumar K.V 92df345c67SAneesh Kumar K.V if ((mode & P9_DMSETGID) == P9_DMSETGID) 93df345c67SAneesh Kumar K.V res |= S_ISGID; 94df345c67SAneesh Kumar K.V 95df345c67SAneesh Kumar K.V if ((mode & P9_DMSETVTX) == P9_DMSETVTX) 96df345c67SAneesh Kumar K.V res |= S_ISVTX; 97df345c67SAneesh Kumar K.V } 98df345c67SAneesh Kumar K.V return res; 99df345c67SAneesh Kumar K.V } 100df345c67SAneesh Kumar K.V 101df345c67SAneesh Kumar K.V /** 1022bad8471SEric Van Hensbergen * p9mode2unixmode- convert plan9 mode bits to unix mode bits 1032bad8471SEric Van Hensbergen * @v9ses: v9fs session information 10445089142SAneesh Kumar K.V * @stat: p9_wstat from which mode need to be derived 10545089142SAneesh Kumar K.V * @rdev: major number, minor number in case of device files. 1062bad8471SEric Van Hensbergen * 1072bad8471SEric Van Hensbergen */ 1083eda0de6SAl Viro static umode_t p9mode2unixmode(struct v9fs_session_info *v9ses, 10945089142SAneesh Kumar K.V struct p9_wstat *stat, dev_t *rdev) 1102bad8471SEric Van Hensbergen { 11105f975cdSDominique Martinet int res, r; 1123eda0de6SAl Viro u32 mode = stat->mode; 1132bad8471SEric Van Hensbergen 11445089142SAneesh Kumar K.V *rdev = 0; 115df345c67SAneesh Kumar K.V res = p9mode2perm(v9ses, stat); 1162bad8471SEric Van Hensbergen 117bd238fb4SLatchesar Ionkov if ((mode & P9_DMDIR) == P9_DMDIR) 1182bad8471SEric Van Hensbergen res |= S_IFDIR; 119dd6102fbSSripathi Kodi else if ((mode & P9_DMSYMLINK) && (v9fs_proto_dotu(v9ses))) 1202bad8471SEric Van Hensbergen res |= S_IFLNK; 121dd6102fbSSripathi Kodi else if ((mode & P9_DMSOCKET) && (v9fs_proto_dotu(v9ses)) 1222bad8471SEric Van Hensbergen && (v9ses->nodev == 0)) 1232bad8471SEric Van Hensbergen res |= S_IFSOCK; 124dd6102fbSSripathi Kodi else if ((mode & P9_DMNAMEDPIPE) && (v9fs_proto_dotu(v9ses)) 1252bad8471SEric Van Hensbergen && (v9ses->nodev == 0)) 1262bad8471SEric Van Hensbergen res |= S_IFIFO; 127dd6102fbSSripathi Kodi else if ((mode & P9_DMDEVICE) && (v9fs_proto_dotu(v9ses)) 12845089142SAneesh Kumar K.V && (v9ses->nodev == 0)) { 12905f975cdSDominique Martinet char type = 0; 13045089142SAneesh Kumar K.V int major = -1, minor = -1; 13145089142SAneesh Kumar K.V 13205f975cdSDominique Martinet r = sscanf(stat->extension, "%c %i %i", &type, &major, &minor); 13305f975cdSDominique Martinet if (r != 3) { 13405f975cdSDominique Martinet p9_debug(P9_DEBUG_ERROR, 13505f975cdSDominique Martinet "invalid device string, umode will be bogus: %s\n", 13605f975cdSDominique Martinet stat->extension); 13705f975cdSDominique Martinet return res; 13805f975cdSDominique Martinet } 13945089142SAneesh Kumar K.V switch (type) { 14045089142SAneesh Kumar K.V case 'c': 14145089142SAneesh Kumar K.V res |= S_IFCHR; 14245089142SAneesh Kumar K.V break; 14345089142SAneesh Kumar K.V case 'b': 1442bad8471SEric Van Hensbergen res |= S_IFBLK; 14545089142SAneesh Kumar K.V break; 14645089142SAneesh Kumar K.V default: 1475d385153SJoe Perches p9_debug(P9_DEBUG_ERROR, "Unknown special type %c %s\n", 1485d385153SJoe Perches type, stat->extension); 14951958817Szhengbin } 15045089142SAneesh Kumar K.V *rdev = MKDEV(major, minor); 15145089142SAneesh Kumar K.V } else 1522bad8471SEric Van Hensbergen res |= S_IFREG; 1532bad8471SEric Van Hensbergen 1542bad8471SEric Van Hensbergen return res; 1552bad8471SEric Van Hensbergen } 1562bad8471SEric Van Hensbergen 157ee443996SEric Van Hensbergen /** 158ee443996SEric Van Hensbergen * v9fs_uflags2omode- convert posix open flags to plan 9 mode bits 159ee443996SEric Van Hensbergen * @uflags: flags to convert 1602e4bef41SEric Van Hensbergen * @extended: if .u extensions are active 161ee443996SEric Van Hensbergen */ 162ee443996SEric Van Hensbergen 1632e4bef41SEric Van Hensbergen int v9fs_uflags2omode(int uflags, int extended) 1646a3124a3SLatchesar Ionkov { 1656a3124a3SLatchesar Ionkov int ret; 1666a3124a3SLatchesar Ionkov 1676a3124a3SLatchesar Ionkov ret = 0; 1686a3124a3SLatchesar Ionkov switch (uflags&3) { 1696a3124a3SLatchesar Ionkov default: 1706a3124a3SLatchesar Ionkov case O_RDONLY: 171bd238fb4SLatchesar Ionkov ret = P9_OREAD; 1726a3124a3SLatchesar Ionkov break; 1736a3124a3SLatchesar Ionkov 1746a3124a3SLatchesar Ionkov case O_WRONLY: 175bd238fb4SLatchesar Ionkov ret = P9_OWRITE; 1766a3124a3SLatchesar Ionkov break; 1776a3124a3SLatchesar Ionkov 1786a3124a3SLatchesar Ionkov case O_RDWR: 179bd238fb4SLatchesar Ionkov ret = P9_ORDWR; 1806a3124a3SLatchesar Ionkov break; 1816a3124a3SLatchesar Ionkov } 1826a3124a3SLatchesar Ionkov 1832e4bef41SEric Van Hensbergen if (extended) { 1842e4bef41SEric Van Hensbergen if (uflags & O_EXCL) 1852e4bef41SEric Van Hensbergen ret |= P9_OEXCL; 1862e4bef41SEric Van Hensbergen 1876a3124a3SLatchesar Ionkov if (uflags & O_APPEND) 188bd238fb4SLatchesar Ionkov ret |= P9_OAPPEND; 1892e4bef41SEric Van Hensbergen } 1906a3124a3SLatchesar Ionkov 1916a3124a3SLatchesar Ionkov return ret; 1926a3124a3SLatchesar Ionkov } 1936a3124a3SLatchesar Ionkov 1942bad8471SEric Van Hensbergen /** 195531b1094SLatchesar Ionkov * v9fs_blank_wstat - helper function to setup a 9P stat structure 196531b1094SLatchesar Ionkov * @wstat: structure to initialize 1972bad8471SEric Van Hensbergen * 1982bad8471SEric Van Hensbergen */ 1992bad8471SEric Van Hensbergen 2007a4439c4SM. Mohan Kumar void 201bd238fb4SLatchesar Ionkov v9fs_blank_wstat(struct p9_wstat *wstat) 2022bad8471SEric Van Hensbergen { 203531b1094SLatchesar Ionkov wstat->type = ~0; 204531b1094SLatchesar Ionkov wstat->dev = ~0; 205531b1094SLatchesar Ionkov wstat->qid.type = ~0; 206531b1094SLatchesar Ionkov wstat->qid.version = ~0; 207531b1094SLatchesar Ionkov *((long long *)&wstat->qid.path) = ~0; 208531b1094SLatchesar Ionkov wstat->mode = ~0; 209531b1094SLatchesar Ionkov wstat->atime = ~0; 210531b1094SLatchesar Ionkov wstat->mtime = ~0; 211531b1094SLatchesar Ionkov wstat->length = ~0; 212531b1094SLatchesar Ionkov wstat->name = NULL; 213531b1094SLatchesar Ionkov wstat->uid = NULL; 214531b1094SLatchesar Ionkov wstat->gid = NULL; 215531b1094SLatchesar Ionkov wstat->muid = NULL; 216447c5094SEric W. Biederman wstat->n_uid = INVALID_UID; 217447c5094SEric W. Biederman wstat->n_gid = INVALID_GID; 218447c5094SEric W. Biederman wstat->n_muid = INVALID_UID; 219531b1094SLatchesar Ionkov wstat->extension = NULL; 2202bad8471SEric Van Hensbergen } 2212bad8471SEric Van Hensbergen 22260e78d2cSAbhishek Kulkarni /** 22360e78d2cSAbhishek Kulkarni * v9fs_alloc_inode - helper function to allocate an inode 224bc868036SDavid Howells * @sb: The superblock to allocate the inode from 22560e78d2cSAbhishek Kulkarni */ 22660e78d2cSAbhishek Kulkarni struct inode *v9fs_alloc_inode(struct super_block *sb) 22760e78d2cSAbhishek Kulkarni { 228a78ce05dSAneesh Kumar K.V struct v9fs_inode *v9inode; 2296e195b0fSDominique Martinet 230fd60b288SMuchun Song v9inode = alloc_inode_sb(sb, v9fs_inode_cache, GFP_KERNEL); 231a78ce05dSAneesh Kumar K.V if (!v9inode) 23260e78d2cSAbhishek Kulkarni return NULL; 2336b39f6d2SAneesh Kumar K.V v9inode->writeback_fid = NULL; 234b3cbea03SAneesh Kumar K.V v9inode->cache_validity = 0; 2355a7e0a8cSAneesh Kumar K.V mutex_init(&v9inode->v_mutex); 236874c8ca1SDavid Howells return &v9inode->netfs.inode; 23760e78d2cSAbhishek Kulkarni } 23860e78d2cSAbhishek Kulkarni 23960e78d2cSAbhishek Kulkarni /** 2405e8a0770SAl Viro * v9fs_free_inode - destroy an inode 241bc868036SDavid Howells * @inode: The inode to be freed 24260e78d2cSAbhishek Kulkarni */ 24360e78d2cSAbhishek Kulkarni 2445e8a0770SAl Viro void v9fs_free_inode(struct inode *inode) 245fa0d7e3dSNick Piggin { 246a78ce05dSAneesh Kumar K.V kmem_cache_free(v9fs_inode_cache, V9FS_I(inode)); 247fa0d7e3dSNick Piggin } 248fa0d7e3dSNick Piggin 249bc899ee1SDavid Howells /* 250bc899ee1SDavid Howells * Set parameters for the netfs library 251bc899ee1SDavid Howells */ 252bc899ee1SDavid Howells static void v9fs_set_netfs_context(struct inode *inode) 253bc899ee1SDavid Howells { 254e81fb419SLinus Torvalds struct v9fs_inode *v9inode = V9FS_I(inode); 255e81fb419SLinus Torvalds netfs_inode_init(&v9inode->netfs, &v9fs_req_ops); 256bc899ee1SDavid Howells } 257bc899ee1SDavid Howells 2585ffc0cb3SAneesh Kumar K.V int v9fs_init_inode(struct v9fs_session_info *v9ses, 2593eda0de6SAl Viro struct inode *inode, umode_t mode, dev_t rdev) 2602bad8471SEric Van Hensbergen { 2615ffc0cb3SAneesh Kumar K.V int err = 0; 2622bb54115SAbhishek Kulkarni 263f2d40141SChristian Brauner inode_init_owner(&nop_mnt_idmap, inode, NULL, mode); 2642bad8471SEric Van Hensbergen inode->i_blocks = 0; 26545089142SAneesh Kumar K.V inode->i_rdev = rdev; 266078cd827SDeepa Dinamani inode->i_atime = inode->i_mtime = inode->i_ctime = current_time(inode); 267147b31cfSEric Van Hensbergen inode->i_mapping->a_ops = &v9fs_addr_operations; 268987a6485SGreg Kurz inode->i_private = NULL; 2692bad8471SEric Van Hensbergen 2702bad8471SEric Van Hensbergen switch (mode & S_IFMT) { 2712bad8471SEric Van Hensbergen case S_IFIFO: 2722bad8471SEric Van Hensbergen case S_IFBLK: 2732bad8471SEric Van Hensbergen case S_IFCHR: 2742bad8471SEric Van Hensbergen case S_IFSOCK: 2754b43516aSM. Mohan Kumar if (v9fs_proto_dotl(v9ses)) { 2764b43516aSM. Mohan Kumar inode->i_op = &v9fs_file_inode_operations_dotl; 2774b43516aSM. Mohan Kumar } else if (v9fs_proto_dotu(v9ses)) { 2784b43516aSM. Mohan Kumar inode->i_op = &v9fs_file_inode_operations; 2794b43516aSM. Mohan Kumar } else { 2805d385153SJoe Perches p9_debug(P9_DEBUG_ERROR, 281bd238fb4SLatchesar Ionkov "special files without extended mode\n"); 2822bb54115SAbhishek Kulkarni err = -EINVAL; 2832bb54115SAbhishek Kulkarni goto error; 284b501611aSEric Van Hensbergen } 2852bb54115SAbhishek Kulkarni init_special_inode(inode, inode->i_mode, inode->i_rdev); 2865d58bec5SEric Van Hensbergen break; 2872bad8471SEric Van Hensbergen case S_IFREG: 2889b6533c9SSripathi Kodi if (v9fs_proto_dotl(v9ses)) { 2899b6533c9SSripathi Kodi inode->i_op = &v9fs_file_inode_operations_dotl; 2909b6533c9SSripathi Kodi inode->i_fop = &v9fs_file_operations_dotl; 2919b6533c9SSripathi Kodi } else { 2922bad8471SEric Van Hensbergen inode->i_op = &v9fs_file_inode_operations; 2932bad8471SEric Van Hensbergen inode->i_fop = &v9fs_file_operations; 2949b6533c9SSripathi Kodi } 2959b6533c9SSripathi Kodi 2962bad8471SEric Van Hensbergen break; 297b501611aSEric Van Hensbergen case S_IFLNK: 2989b6533c9SSripathi Kodi if (!v9fs_proto_dotu(v9ses) && !v9fs_proto_dotl(v9ses)) { 2995d385153SJoe Perches p9_debug(P9_DEBUG_ERROR, 3005d385153SJoe Perches "extended modes used with legacy protocol\n"); 3012bb54115SAbhishek Kulkarni err = -EINVAL; 3022bb54115SAbhishek Kulkarni goto error; 303b501611aSEric Van Hensbergen } 3049b6533c9SSripathi Kodi 3059b6533c9SSripathi Kodi if (v9fs_proto_dotl(v9ses)) 3069b6533c9SSripathi Kodi inode->i_op = &v9fs_symlink_inode_operations_dotl; 3079b6533c9SSripathi Kodi else 308b501611aSEric Van Hensbergen inode->i_op = &v9fs_symlink_inode_operations; 3099b6533c9SSripathi Kodi 310b501611aSEric Van Hensbergen break; 3112bad8471SEric Van Hensbergen case S_IFDIR: 312d8c76e6fSDave Hansen inc_nlink(inode); 3139b6533c9SSripathi Kodi if (v9fs_proto_dotl(v9ses)) 3149b6533c9SSripathi Kodi inode->i_op = &v9fs_dir_inode_operations_dotl; 3159b6533c9SSripathi Kodi else if (v9fs_proto_dotu(v9ses)) 3169b6533c9SSripathi Kodi inode->i_op = &v9fs_dir_inode_operations_dotu; 317b501611aSEric Van Hensbergen else 3182bad8471SEric Van Hensbergen inode->i_op = &v9fs_dir_inode_operations; 3199b6533c9SSripathi Kodi 3209b6533c9SSripathi Kodi if (v9fs_proto_dotl(v9ses)) 3219b6533c9SSripathi Kodi inode->i_fop = &v9fs_dir_operations_dotl; 3229b6533c9SSripathi Kodi else 3232bad8471SEric Van Hensbergen inode->i_fop = &v9fs_dir_operations; 3249b6533c9SSripathi Kodi 3252bad8471SEric Van Hensbergen break; 3262bad8471SEric Van Hensbergen default: 327609eac1cSLinus Torvalds p9_debug(P9_DEBUG_ERROR, "BAD mode 0x%hx S_IFMT 0x%x\n", 3282bad8471SEric Van Hensbergen mode, mode & S_IFMT); 3292bb54115SAbhishek Kulkarni err = -EINVAL; 3302bb54115SAbhishek Kulkarni goto error; 3312bad8471SEric Van Hensbergen } 332bc899ee1SDavid Howells 333bc899ee1SDavid Howells v9fs_set_netfs_context(inode); 3342bb54115SAbhishek Kulkarni error: 3355ffc0cb3SAneesh Kumar K.V return err; 3365ffc0cb3SAneesh Kumar K.V 3375ffc0cb3SAneesh Kumar K.V } 3385ffc0cb3SAneesh Kumar K.V 3395ffc0cb3SAneesh Kumar K.V /** 3405ffc0cb3SAneesh Kumar K.V * v9fs_get_inode - helper function to setup an inode 3415ffc0cb3SAneesh Kumar K.V * @sb: superblock 3425ffc0cb3SAneesh Kumar K.V * @mode: mode to setup inode with 343bc868036SDavid Howells * @rdev: The device numbers to set 3445ffc0cb3SAneesh Kumar K.V */ 3455ffc0cb3SAneesh Kumar K.V 3463eda0de6SAl Viro struct inode *v9fs_get_inode(struct super_block *sb, umode_t mode, dev_t rdev) 3475ffc0cb3SAneesh Kumar K.V { 3485ffc0cb3SAneesh Kumar K.V int err; 3495ffc0cb3SAneesh Kumar K.V struct inode *inode; 3505ffc0cb3SAneesh Kumar K.V struct v9fs_session_info *v9ses = sb->s_fs_info; 3515ffc0cb3SAneesh Kumar K.V 352609eac1cSLinus Torvalds p9_debug(P9_DEBUG_VFS, "super block: %p mode: %ho\n", sb, mode); 3535ffc0cb3SAneesh Kumar K.V 3545ffc0cb3SAneesh Kumar K.V inode = new_inode(sb); 3555ffc0cb3SAneesh Kumar K.V if (!inode) { 3565d385153SJoe Perches pr_warn("%s (%d): Problem allocating inode\n", 3575d385153SJoe Perches __func__, task_pid_nr(current)); 3585ffc0cb3SAneesh Kumar K.V return ERR_PTR(-ENOMEM); 3595ffc0cb3SAneesh Kumar K.V } 36045089142SAneesh Kumar K.V err = v9fs_init_inode(v9ses, inode, mode, rdev); 3615ffc0cb3SAneesh Kumar K.V if (err) { 3622bb54115SAbhishek Kulkarni iput(inode); 3632bb54115SAbhishek Kulkarni return ERR_PTR(err); 3642bad8471SEric Van Hensbergen } 3655ffc0cb3SAneesh Kumar K.V return inode; 3665ffc0cb3SAneesh Kumar K.V } 3672bad8471SEric Van Hensbergen 36860e78d2cSAbhishek Kulkarni /** 369bc868036SDavid Howells * v9fs_evict_inode - Remove an inode from the inode cache 37060e78d2cSAbhishek Kulkarni * @inode: inode to release 37160e78d2cSAbhishek Kulkarni * 37260e78d2cSAbhishek Kulkarni */ 373b57922d9SAl Viro void v9fs_evict_inode(struct inode *inode) 37460e78d2cSAbhishek Kulkarni { 3756b39f6d2SAneesh Kumar K.V struct v9fs_inode *v9inode = V9FS_I(inode); 37693c84614SDavid Howells __le32 version; 3776b39f6d2SAneesh Kumar K.V 3784ad78628SAl Viro truncate_inode_pages_final(&inode->i_data); 37993c84614SDavid Howells version = cpu_to_le32(v9inode->qid.version); 38093c84614SDavid Howells fscache_clear_inode_writeback(v9fs_inode_cookie(v9inode), inode, 38193c84614SDavid Howells &version); 382dbd5768fSJan Kara clear_inode(inode); 3834ad78628SAl Viro filemap_fdatawrite(&inode->i_data); 38460e78d2cSAbhishek Kulkarni 38524e42e32SDavid Howells fscache_relinquish_cookie(v9fs_inode_cookie(v9inode), false); 3866b39f6d2SAneesh Kumar K.V /* clunk the fid stashed in writeback_fid */ 387b48dbb99SDominique Martinet p9_fid_put(v9inode->writeback_fid); 3886b39f6d2SAneesh Kumar K.V v9inode->writeback_fid = NULL; 3893cf387d7SAneesh Kumar K.V } 39060e78d2cSAbhishek Kulkarni 391fd2421f5SAneesh Kumar K.V static int v9fs_test_inode(struct inode *inode, void *data) 392fd2421f5SAneesh Kumar K.V { 393fd2421f5SAneesh Kumar K.V int umode; 39445089142SAneesh Kumar K.V dev_t rdev; 395fd2421f5SAneesh Kumar K.V struct v9fs_inode *v9inode = V9FS_I(inode); 396fd2421f5SAneesh Kumar K.V struct p9_wstat *st = (struct p9_wstat *)data; 397fd2421f5SAneesh Kumar K.V struct v9fs_session_info *v9ses = v9fs_inode2v9ses(inode); 398fd2421f5SAneesh Kumar K.V 39945089142SAneesh Kumar K.V umode = p9mode2unixmode(v9ses, st, &rdev); 400fd2421f5SAneesh Kumar K.V /* don't match inode of different type */ 4016e3e2c43SAl Viro if (inode_wrong_type(inode, umode)) 402fd2421f5SAneesh Kumar K.V return 0; 403fd2421f5SAneesh Kumar K.V 404fd2421f5SAneesh Kumar K.V /* compare qid details */ 405fd2421f5SAneesh Kumar K.V if (memcmp(&v9inode->qid.version, 406fd2421f5SAneesh Kumar K.V &st->qid.version, sizeof(v9inode->qid.version))) 407fd2421f5SAneesh Kumar K.V return 0; 408fd2421f5SAneesh Kumar K.V 409fd2421f5SAneesh Kumar K.V if (v9inode->qid.type != st->qid.type) 410fd2421f5SAneesh Kumar K.V return 0; 4118ee03163STuomas Tynkkynen 4128ee03163STuomas Tynkkynen if (v9inode->qid.path != st->qid.path) 4138ee03163STuomas Tynkkynen return 0; 414fd2421f5SAneesh Kumar K.V return 1; 415fd2421f5SAneesh Kumar K.V } 416fd2421f5SAneesh Kumar K.V 417ed80fcfaSAneesh Kumar K.V static int v9fs_test_new_inode(struct inode *inode, void *data) 418ed80fcfaSAneesh Kumar K.V { 419ed80fcfaSAneesh Kumar K.V return 0; 420ed80fcfaSAneesh Kumar K.V } 421ed80fcfaSAneesh Kumar K.V 422fd2421f5SAneesh Kumar K.V static int v9fs_set_inode(struct inode *inode, void *data) 423fd2421f5SAneesh Kumar K.V { 424fd2421f5SAneesh Kumar K.V struct v9fs_inode *v9inode = V9FS_I(inode); 425fd2421f5SAneesh Kumar K.V struct p9_wstat *st = (struct p9_wstat *)data; 426fd2421f5SAneesh Kumar K.V 427fd2421f5SAneesh Kumar K.V memcpy(&v9inode->qid, &st->qid, sizeof(st->qid)); 428fd2421f5SAneesh Kumar K.V return 0; 429fd2421f5SAneesh Kumar K.V } 430fd2421f5SAneesh Kumar K.V 4315ffc0cb3SAneesh Kumar K.V static struct inode *v9fs_qid_iget(struct super_block *sb, 4325ffc0cb3SAneesh Kumar K.V struct p9_qid *qid, 433ed80fcfaSAneesh Kumar K.V struct p9_wstat *st, 434ed80fcfaSAneesh Kumar K.V int new) 4355ffc0cb3SAneesh Kumar K.V { 43645089142SAneesh Kumar K.V dev_t rdev; 4373eda0de6SAl Viro int retval; 4383eda0de6SAl Viro umode_t umode; 4395ffc0cb3SAneesh Kumar K.V unsigned long i_ino; 4405ffc0cb3SAneesh Kumar K.V struct inode *inode; 4415ffc0cb3SAneesh Kumar K.V struct v9fs_session_info *v9ses = sb->s_fs_info; 4426e195b0fSDominique Martinet int (*test)(struct inode *inode, void *data); 443ed80fcfaSAneesh Kumar K.V 444ed80fcfaSAneesh Kumar K.V if (new) 445ed80fcfaSAneesh Kumar K.V test = v9fs_test_new_inode; 446ed80fcfaSAneesh Kumar K.V else 447ed80fcfaSAneesh Kumar K.V test = v9fs_test_inode; 4485ffc0cb3SAneesh Kumar K.V 4495ffc0cb3SAneesh Kumar K.V i_ino = v9fs_qid2ino(qid); 450ed80fcfaSAneesh Kumar K.V inode = iget5_locked(sb, i_ino, test, v9fs_set_inode, st); 4515ffc0cb3SAneesh Kumar K.V if (!inode) 4525ffc0cb3SAneesh Kumar K.V return ERR_PTR(-ENOMEM); 4535ffc0cb3SAneesh Kumar K.V if (!(inode->i_state & I_NEW)) 4545ffc0cb3SAneesh Kumar K.V return inode; 4555ffc0cb3SAneesh Kumar K.V /* 4565ffc0cb3SAneesh Kumar K.V * initialize the inode with the stat info 4575ffc0cb3SAneesh Kumar K.V * FIXME!! we may need support for stale inodes 4585ffc0cb3SAneesh Kumar K.V * later. 4595ffc0cb3SAneesh Kumar K.V */ 460fd2421f5SAneesh Kumar K.V inode->i_ino = i_ino; 46145089142SAneesh Kumar K.V umode = p9mode2unixmode(v9ses, st, &rdev); 46245089142SAneesh Kumar K.V retval = v9fs_init_inode(v9ses, inode, umode, rdev); 4635ffc0cb3SAneesh Kumar K.V if (retval) 4645ffc0cb3SAneesh Kumar K.V goto error; 4655ffc0cb3SAneesh Kumar K.V 4665e3cc1eeSHou Tao v9fs_stat2inode(st, inode, sb, 0); 4675ffc0cb3SAneesh Kumar K.V v9fs_cache_inode_get_cookie(inode); 4685ffc0cb3SAneesh Kumar K.V unlock_new_inode(inode); 4695ffc0cb3SAneesh Kumar K.V return inode; 4705ffc0cb3SAneesh Kumar K.V error: 4710a73d0a2SAl Viro iget_failed(inode); 4725ffc0cb3SAneesh Kumar K.V return ERR_PTR(retval); 4735ffc0cb3SAneesh Kumar K.V 4745ffc0cb3SAneesh Kumar K.V } 4755ffc0cb3SAneesh Kumar K.V 47653c06f4eSAneesh Kumar K.V struct inode * 477a78ce05dSAneesh Kumar K.V v9fs_inode_from_fid(struct v9fs_session_info *v9ses, struct p9_fid *fid, 478ed80fcfaSAneesh Kumar K.V struct super_block *sb, int new) 4796a3124a3SLatchesar Ionkov { 48051a87c55SEric Van Hensbergen struct p9_wstat *st; 4815ffc0cb3SAneesh Kumar K.V struct inode *inode = NULL; 4826a3124a3SLatchesar Ionkov 483bd238fb4SLatchesar Ionkov st = p9_client_stat(fid); 48402bc3567SAbhishek Kulkarni if (IS_ERR(st)) 48502bc3567SAbhishek Kulkarni return ERR_CAST(st); 4862bad8471SEric Van Hensbergen 487ed80fcfaSAneesh Kumar K.V inode = v9fs_qid_iget(sb, &st->qid, st, new); 48802bc3567SAbhishek Kulkarni p9stat_free(st); 489bd238fb4SLatchesar Ionkov kfree(st); 4905ffc0cb3SAneesh Kumar K.V return inode; 4912bad8471SEric Van Hensbergen } 4922bad8471SEric Van Hensbergen 4932bad8471SEric Van Hensbergen /** 494f88657ceSAneesh Kumar K.V * v9fs_at_to_dotl_flags- convert Linux specific AT flags to 495f88657ceSAneesh Kumar K.V * plan 9 AT flag. 496f88657ceSAneesh Kumar K.V * @flags: flags to convert 497f88657ceSAneesh Kumar K.V */ 498f88657ceSAneesh Kumar K.V static int v9fs_at_to_dotl_flags(int flags) 499f88657ceSAneesh Kumar K.V { 500f88657ceSAneesh Kumar K.V int rflags = 0; 5016e195b0fSDominique Martinet 502f88657ceSAneesh Kumar K.V if (flags & AT_REMOVEDIR) 503f88657ceSAneesh Kumar K.V rflags |= P9_DOTL_AT_REMOVEDIR; 5046e195b0fSDominique Martinet 505f88657ceSAneesh Kumar K.V return rflags; 506f88657ceSAneesh Kumar K.V } 507f88657ceSAneesh Kumar K.V 508f88657ceSAneesh Kumar K.V /** 509ac89b2efSEryu Guan * v9fs_dec_count - helper functon to drop i_nlink. 510ac89b2efSEryu Guan * 511ac89b2efSEryu Guan * If a directory had nlink <= 2 (including . and ..), then we should not drop 512ac89b2efSEryu Guan * the link count, which indicates the underlying exported fs doesn't maintain 513ac89b2efSEryu Guan * nlink accurately. e.g. 514ac89b2efSEryu Guan * - overlayfs sets nlink to 1 for merged dir 515ac89b2efSEryu Guan * - ext4 (with dir_nlink feature enabled) sets nlink to 1 if a dir has more 516ac89b2efSEryu Guan * than EXT4_LINK_MAX (65000) links. 517ac89b2efSEryu Guan * 518ac89b2efSEryu Guan * @inode: inode whose nlink is being dropped 519ac89b2efSEryu Guan */ 520ac89b2efSEryu Guan static void v9fs_dec_count(struct inode *inode) 521ac89b2efSEryu Guan { 522ac89b2efSEryu Guan if (!S_ISDIR(inode->i_mode) || inode->i_nlink > 2) 523ac89b2efSEryu Guan drop_nlink(inode); 524ac89b2efSEryu Guan } 525ac89b2efSEryu Guan 526ac89b2efSEryu Guan /** 5272bad8471SEric Van Hensbergen * v9fs_remove - helper function to remove files and directories 52873c592b9SEric Van Hensbergen * @dir: directory inode that is being deleted 52948e370ffSAneesh Kumar K.V * @dentry: dentry that is being deleted 530fd2916bdSFabian Frederick * @flags: removing a directory 5312bad8471SEric Van Hensbergen * 5322bad8471SEric Van Hensbergen */ 5332bad8471SEric Van Hensbergen 53448e370ffSAneesh Kumar K.V static int v9fs_remove(struct inode *dir, struct dentry *dentry, int flags) 5352bad8471SEric Van Hensbergen { 53648e370ffSAneesh Kumar K.V struct inode *inode; 53748e370ffSAneesh Kumar K.V int retval = -EOPNOTSUPP; 53848e370ffSAneesh Kumar K.V struct p9_fid *v9fid, *dfid; 53948e370ffSAneesh Kumar K.V struct v9fs_session_info *v9ses; 5402bad8471SEric Van Hensbergen 5415d385153SJoe Perches p9_debug(P9_DEBUG_VFS, "inode: %p dentry: %p rmdir: %x\n", 54248e370ffSAneesh Kumar K.V dir, dentry, flags); 5432bad8471SEric Van Hensbergen 54448e370ffSAneesh Kumar K.V v9ses = v9fs_inode2v9ses(dir); 5452b0143b5SDavid Howells inode = d_inode(dentry); 54677d5a6b7SAl Viro dfid = v9fs_parent_fid(dentry); 54748e370ffSAneesh Kumar K.V if (IS_ERR(dfid)) { 54848e370ffSAneesh Kumar K.V retval = PTR_ERR(dfid); 5495d385153SJoe Perches p9_debug(P9_DEBUG_VFS, "fid lookup failed %d\n", retval); 55048e370ffSAneesh Kumar K.V return retval; 55148e370ffSAneesh Kumar K.V } 55248e370ffSAneesh Kumar K.V if (v9fs_proto_dotl(v9ses)) 553f88657ceSAneesh Kumar K.V retval = p9_client_unlinkat(dfid, dentry->d_name.name, 554f88657ceSAneesh Kumar K.V v9fs_at_to_dotl_flags(flags)); 555b48dbb99SDominique Martinet p9_fid_put(dfid); 55648e370ffSAneesh Kumar K.V if (retval == -EOPNOTSUPP) { 55748e370ffSAneesh Kumar K.V /* Try the one based on path */ 55848e370ffSAneesh Kumar K.V v9fid = v9fs_fid_clone(dentry); 559da977b2cSEric Van Hensbergen if (IS_ERR(v9fid)) 560da977b2cSEric Van Hensbergen return PTR_ERR(v9fid); 561d994f405SAneesh Kumar K.V retval = p9_client_remove(v9fid); 56248e370ffSAneesh Kumar K.V } 563b271ec47SAneesh Kumar K.V if (!retval) { 564b271ec47SAneesh Kumar K.V /* 565b271ec47SAneesh Kumar K.V * directories on unlink should have zero 566b271ec47SAneesh Kumar K.V * link count 567b271ec47SAneesh Kumar K.V */ 56848e370ffSAneesh Kumar K.V if (flags & AT_REMOVEDIR) { 56948e370ffSAneesh Kumar K.V clear_nlink(inode); 570ac89b2efSEryu Guan v9fs_dec_count(dir); 571b271ec47SAneesh Kumar K.V } else 572ac89b2efSEryu Guan v9fs_dec_count(inode); 573d28c61f0SAneesh Kumar K.V 57448e370ffSAneesh Kumar K.V v9fs_invalidate_inode_attr(inode); 575d28c61f0SAneesh Kumar K.V v9fs_invalidate_inode_attr(dir); 576154372e6SEric Van Hensbergen 577154372e6SEric Van Hensbergen /* invalidate all fids associated with dentry */ 578154372e6SEric Van Hensbergen /* NOTE: This will not include open fids */ 579154372e6SEric Van Hensbergen dentry->d_op->d_release(dentry); 580b271ec47SAneesh Kumar K.V } 581d994f405SAneesh Kumar K.V return retval; 5822bad8471SEric Van Hensbergen } 5832bad8471SEric Van Hensbergen 584bd238fb4SLatchesar Ionkov /** 585bd238fb4SLatchesar Ionkov * v9fs_create - Create a file 586ee443996SEric Van Hensbergen * @v9ses: session information 587ee443996SEric Van Hensbergen * @dir: directory that dentry is being created in 588bd238fb4SLatchesar Ionkov * @dentry: dentry that is being created 5890e15597eSAbhishek Kulkarni * @extension: 9p2000.u extension string to support devices, etc. 590bd238fb4SLatchesar Ionkov * @perm: create permissions 591bd238fb4SLatchesar Ionkov * @mode: open mode 592bd238fb4SLatchesar Ionkov * 593bd238fb4SLatchesar Ionkov */ 594bd238fb4SLatchesar Ionkov static struct p9_fid * 595bd238fb4SLatchesar Ionkov v9fs_create(struct v9fs_session_info *v9ses, struct inode *dir, 596bd238fb4SLatchesar Ionkov struct dentry *dentry, char *extension, u32 perm, u8 mode) 597bd238fb4SLatchesar Ionkov { 598bd238fb4SLatchesar Ionkov int err; 5997880b43bSAl Viro const unsigned char *name; 6006636b6dcSJianyong Wu struct p9_fid *dfid, *ofid = NULL, *fid = NULL; 601bd238fb4SLatchesar Ionkov struct inode *inode; 602bd238fb4SLatchesar Ionkov 6034b8e9923SAl Viro p9_debug(P9_DEBUG_VFS, "name %pd\n", dentry); 60451a87c55SEric Van Hensbergen 605bd238fb4SLatchesar Ionkov err = 0; 6067880b43bSAl Viro name = dentry->d_name.name; 60777d5a6b7SAl Viro dfid = v9fs_parent_fid(dentry); 608bd238fb4SLatchesar Ionkov if (IS_ERR(dfid)) { 609bd238fb4SLatchesar Ionkov err = PTR_ERR(dfid); 6105d385153SJoe Perches p9_debug(P9_DEBUG_VFS, "fid lookup failed %d\n", err); 6116d27e64dSVenkateswararao Jujjuri return ERR_PTR(err); 612bd238fb4SLatchesar Ionkov } 613bd238fb4SLatchesar Ionkov 614bd238fb4SLatchesar Ionkov /* clone a fid to use for creation */ 6157d50a29fSAl Viro ofid = clone_fid(dfid); 616bd238fb4SLatchesar Ionkov if (IS_ERR(ofid)) { 617bd238fb4SLatchesar Ionkov err = PTR_ERR(ofid); 6185d385153SJoe Perches p9_debug(P9_DEBUG_VFS, "p9_client_walk failed %d\n", err); 619dafbe689SDominique Martinet goto error; 620bd238fb4SLatchesar Ionkov } 621bd238fb4SLatchesar Ionkov 622bd238fb4SLatchesar Ionkov err = p9_client_fcreate(ofid, name, perm, mode, extension); 62351a87c55SEric Van Hensbergen if (err < 0) { 6245d385153SJoe Perches p9_debug(P9_DEBUG_VFS, "p9_client_fcreate failed %d\n", err); 625bd238fb4SLatchesar Ionkov goto error; 62651a87c55SEric Van Hensbergen } 627bd238fb4SLatchesar Ionkov 628b6054793SAneesh Kumar K.V if (!(perm & P9_DMLINK)) { 629bd238fb4SLatchesar Ionkov /* now walk from the parent so we can get unopened fid */ 6306d27e64dSVenkateswararao Jujjuri fid = p9_client_walk(dfid, 1, &name, 1); 631bd238fb4SLatchesar Ionkov if (IS_ERR(fid)) { 632bd238fb4SLatchesar Ionkov err = PTR_ERR(fid); 633b6054793SAneesh Kumar K.V p9_debug(P9_DEBUG_VFS, 634b6054793SAneesh Kumar K.V "p9_client_walk failed %d\n", err); 635bd238fb4SLatchesar Ionkov goto error; 6366d27e64dSVenkateswararao Jujjuri } 637b6054793SAneesh Kumar K.V /* 638b6054793SAneesh Kumar K.V * instantiate inode and assign the unopened fid to the dentry 639b6054793SAneesh Kumar K.V */ 640ed80fcfaSAneesh Kumar K.V inode = v9fs_get_new_inode_from_fid(v9ses, fid, dir->i_sb); 641bd238fb4SLatchesar Ionkov if (IS_ERR(inode)) { 642bd238fb4SLatchesar Ionkov err = PTR_ERR(inode); 643b6054793SAneesh Kumar K.V p9_debug(P9_DEBUG_VFS, 644b6054793SAneesh Kumar K.V "inode creation failed %d\n", err); 645bd238fb4SLatchesar Ionkov goto error; 646bd238fb4SLatchesar Ionkov } 647dafbe689SDominique Martinet v9fs_fid_add(dentry, &fid); 6485441ae5eSAneesh Kumar K.V d_instantiate(dentry, inode); 649b6054793SAneesh Kumar K.V } 650b48dbb99SDominique Martinet p9_fid_put(dfid); 651bd238fb4SLatchesar Ionkov return ofid; 652bd238fb4SLatchesar Ionkov error: 653dafbe689SDominique Martinet p9_fid_put(dfid); 654b48dbb99SDominique Martinet p9_fid_put(ofid); 655b48dbb99SDominique Martinet p9_fid_put(fid); 656bd238fb4SLatchesar Ionkov return ERR_PTR(err); 657bd238fb4SLatchesar Ionkov } 658bd238fb4SLatchesar Ionkov 6592bad8471SEric Van Hensbergen /** 660e43ae79cSMiklos Szeredi * v9fs_vfs_create - VFS hook to create a regular file 6616c960e68SChristian Brauner * @idmap: idmap of the mount 662bc868036SDavid Howells * @dir: The parent directory 663bc868036SDavid Howells * @dentry: The name of file to be created 664bc868036SDavid Howells * @mode: The UNIX file mode to set 665bc868036SDavid Howells * @excl: True if the file must not yet exist 666e43ae79cSMiklos Szeredi * 667e43ae79cSMiklos Szeredi * open(.., O_CREAT) is handled in v9fs_vfs_atomic_open(). This is only called 668e43ae79cSMiklos Szeredi * for mknod(2). 669e43ae79cSMiklos Szeredi * 6702bad8471SEric Van Hensbergen */ 6712bad8471SEric Van Hensbergen 6722bad8471SEric Van Hensbergen static int 6736c960e68SChristian Brauner v9fs_vfs_create(struct mnt_idmap *idmap, struct inode *dir, 674549c7297SChristian Brauner struct dentry *dentry, umode_t mode, bool excl) 6752bad8471SEric Van Hensbergen { 676e43ae79cSMiklos Szeredi struct v9fs_session_info *v9ses = v9fs_inode2v9ses(dir); 677e43ae79cSMiklos Szeredi u32 perm = unixmode2p9mode(v9ses, mode); 678e43ae79cSMiklos Szeredi struct p9_fid *fid; 6796a3124a3SLatchesar Ionkov 680e43ae79cSMiklos Szeredi /* P9_OEXCL? */ 681e43ae79cSMiklos Szeredi fid = v9fs_create(v9ses, dir, dentry, NULL, perm, P9_ORDWR); 682e43ae79cSMiklos Szeredi if (IS_ERR(fid)) 683e43ae79cSMiklos Szeredi return PTR_ERR(fid); 6846a3124a3SLatchesar Ionkov 685d28c61f0SAneesh Kumar K.V v9fs_invalidate_inode_attr(dir); 686b48dbb99SDominique Martinet p9_fid_put(fid); 6876a3124a3SLatchesar Ionkov 6886a3124a3SLatchesar Ionkov return 0; 6892bad8471SEric Van Hensbergen } 6902bad8471SEric Van Hensbergen 6912bad8471SEric Van Hensbergen /** 6922bad8471SEric Van Hensbergen * v9fs_vfs_mkdir - VFS mkdir hook to create a directory 693c54bd91eSChristian Brauner * @idmap: idmap of the mount 694ee443996SEric Van Hensbergen * @dir: inode that is being unlinked 6952bad8471SEric Van Hensbergen * @dentry: dentry that is being unlinked 6962bad8471SEric Van Hensbergen * @mode: mode for new directory 6972bad8471SEric Van Hensbergen * 6982bad8471SEric Van Hensbergen */ 6992bad8471SEric Van Hensbergen 700c54bd91eSChristian Brauner static int v9fs_vfs_mkdir(struct mnt_idmap *idmap, struct inode *dir, 701549c7297SChristian Brauner struct dentry *dentry, umode_t mode) 7022bad8471SEric Van Hensbergen { 7036a3124a3SLatchesar Ionkov int err; 704bd238fb4SLatchesar Ionkov u32 perm; 705bd238fb4SLatchesar Ionkov struct p9_fid *fid; 706d28c61f0SAneesh Kumar K.V struct v9fs_session_info *v9ses; 7076a3124a3SLatchesar Ionkov 7084b8e9923SAl Viro p9_debug(P9_DEBUG_VFS, "name %pd\n", dentry); 709bd238fb4SLatchesar Ionkov err = 0; 7106a3124a3SLatchesar Ionkov v9ses = v9fs_inode2v9ses(dir); 7116a3124a3SLatchesar Ionkov perm = unixmode2p9mode(v9ses, mode | S_IFDIR); 712bd238fb4SLatchesar Ionkov fid = v9fs_create(v9ses, dir, dentry, NULL, perm, P9_OREAD); 713bd238fb4SLatchesar Ionkov if (IS_ERR(fid)) { 714bd238fb4SLatchesar Ionkov err = PTR_ERR(fid); 715bd238fb4SLatchesar Ionkov fid = NULL; 716d28c61f0SAneesh Kumar K.V } else { 717b271ec47SAneesh Kumar K.V inc_nlink(dir); 718d28c61f0SAneesh Kumar K.V v9fs_invalidate_inode_attr(dir); 719d28c61f0SAneesh Kumar K.V } 7206a3124a3SLatchesar Ionkov 721bd238fb4SLatchesar Ionkov if (fid) 722b48dbb99SDominique Martinet p9_fid_put(fid); 7236a3124a3SLatchesar Ionkov 7246a3124a3SLatchesar Ionkov return err; 7252bad8471SEric Van Hensbergen } 7262bad8471SEric Van Hensbergen 7272bad8471SEric Van Hensbergen /** 7282bad8471SEric Van Hensbergen * v9fs_vfs_lookup - VFS lookup hook to "walk" to a new inode 7292bad8471SEric Van Hensbergen * @dir: inode that is being walked from 7302bad8471SEric Van Hensbergen * @dentry: dentry that is being walked to? 731fd2916bdSFabian Frederick * @flags: lookup flags (unused) 7322bad8471SEric Van Hensbergen * 7332bad8471SEric Van Hensbergen */ 7342bad8471SEric Van Hensbergen 73553c06f4eSAneesh Kumar K.V struct dentry *v9fs_vfs_lookup(struct inode *dir, struct dentry *dentry, 73600cd8dd3SAl Viro unsigned int flags) 7372bad8471SEric Van Hensbergen { 73873f50717SAneesh Kumar K.V struct dentry *res; 7392bad8471SEric Van Hensbergen struct v9fs_session_info *v9ses; 740bd238fb4SLatchesar Ionkov struct p9_fid *dfid, *fid; 7412bad8471SEric Van Hensbergen struct inode *inode; 7427880b43bSAl Viro const unsigned char *name; 7432bad8471SEric Van Hensbergen 7444b8e9923SAl Viro p9_debug(P9_DEBUG_VFS, "dir: %p dentry: (%pd) %p flags: %x\n", 7454b8e9923SAl Viro dir, dentry, dentry, flags); 7462bad8471SEric Van Hensbergen 74711e9b49bSSripathi Kodi if (dentry->d_name.len > NAME_MAX) 74811e9b49bSSripathi Kodi return ERR_PTR(-ENAMETOOLONG); 74911e9b49bSSripathi Kodi 7502bad8471SEric Van Hensbergen v9ses = v9fs_inode2v9ses(dir); 751a534c8d1SAneesh Kumar K.V /* We can walk d_parent because we hold the dir->i_mutex */ 75277d5a6b7SAl Viro dfid = v9fs_parent_fid(dentry); 753bd238fb4SLatchesar Ionkov if (IS_ERR(dfid)) 754e231c2eeSDavid Howells return ERR_CAST(dfid); 7552bad8471SEric Van Hensbergen 75673f50717SAneesh Kumar K.V /* 75773f50717SAneesh Kumar K.V * Make sure we don't use a wrong inode due to parallel 75873f50717SAneesh Kumar K.V * unlink. For cached mode create calls request for new 75973f50717SAneesh Kumar K.V * inode. But with cache disabled, lookup should do this. 76073f50717SAneesh Kumar K.V */ 761500e2ab6SAl Viro name = dentry->d_name.name; 762500e2ab6SAl Viro fid = p9_client_walk(dfid, 1, &name, 1); 763b48dbb99SDominique Martinet p9_fid_put(dfid); 764500e2ab6SAl Viro if (fid == ERR_PTR(-ENOENT)) 765500e2ab6SAl Viro inode = NULL; 766500e2ab6SAl Viro else if (IS_ERR(fid)) 767500e2ab6SAl Viro inode = ERR_CAST(fid); 768500e2ab6SAl Viro else if (v9ses->cache == CACHE_LOOSE || v9ses->cache == CACHE_FSCACHE) 769a78ce05dSAneesh Kumar K.V inode = v9fs_get_inode_from_fid(v9ses, fid, dir->i_sb); 77073f50717SAneesh Kumar K.V else 77173f50717SAneesh Kumar K.V inode = v9fs_get_new_inode_from_fid(v9ses, fid, dir->i_sb); 77273f50717SAneesh Kumar K.V /* 77373f50717SAneesh Kumar K.V * If we had a rename on the server and a parallel lookup 77473f50717SAneesh Kumar K.V * for the new name, then make sure we instantiate with 77573f50717SAneesh Kumar K.V * the new name. ie look up for a/b, while on server somebody 77673f50717SAneesh Kumar K.V * moved b under k and client parallely did a lookup for 77773f50717SAneesh Kumar K.V * k/b. 77873f50717SAneesh Kumar K.V */ 77941d28bcaSAl Viro res = d_splice_alias(inode, dentry); 780500e2ab6SAl Viro if (!IS_ERR(fid)) { 781a3b2157eSAl Viro if (!res) 782dafbe689SDominique Martinet v9fs_fid_add(dentry, &fid); 783a3b2157eSAl Viro else if (!IS_ERR(res)) 784dafbe689SDominique Martinet v9fs_fid_add(res, &fid); 785a3b2157eSAl Viro else 786b48dbb99SDominique Martinet p9_fid_put(fid); 787500e2ab6SAl Viro } 7887b5be621SAl Viro return res; 7892bad8471SEric Van Hensbergen } 7902bad8471SEric Van Hensbergen 791d9585277SAl Viro static int 792e43ae79cSMiklos Szeredi v9fs_vfs_atomic_open(struct inode *dir, struct dentry *dentry, 7936e195b0fSDominique Martinet struct file *file, unsigned int flags, umode_t mode) 794e43ae79cSMiklos Szeredi { 795e43ae79cSMiklos Szeredi int err; 796e43ae79cSMiklos Szeredi u32 perm; 797e43ae79cSMiklos Szeredi struct v9fs_inode *v9inode; 798e43ae79cSMiklos Szeredi struct v9fs_session_info *v9ses; 799e43ae79cSMiklos Szeredi struct p9_fid *fid, *inode_fid; 800e43ae79cSMiklos Szeredi struct dentry *res = NULL; 801987a6485SGreg Kurz struct inode *inode; 802e43ae79cSMiklos Szeredi 80300699ad8SAl Viro if (d_in_lookup(dentry)) { 80400cd8dd3SAl Viro res = v9fs_vfs_lookup(dir, dentry, 0); 805e43ae79cSMiklos Szeredi if (IS_ERR(res)) 806d9585277SAl Viro return PTR_ERR(res); 807e43ae79cSMiklos Szeredi 808e43ae79cSMiklos Szeredi if (res) 809e43ae79cSMiklos Szeredi dentry = res; 810e43ae79cSMiklos Szeredi } 811e43ae79cSMiklos Szeredi 812e43ae79cSMiklos Szeredi /* Only creates */ 8132b0143b5SDavid Howells if (!(flags & O_CREAT) || d_really_is_positive(dentry)) 814e45198a6SAl Viro return finish_no_open(file, res); 815e43ae79cSMiklos Szeredi 816e43ae79cSMiklos Szeredi err = 0; 817fae74696SGeyslan G. Bem 818e43ae79cSMiklos Szeredi v9ses = v9fs_inode2v9ses(dir); 819e43ae79cSMiklos Szeredi perm = unixmode2p9mode(v9ses, mode); 820e43ae79cSMiklos Szeredi fid = v9fs_create(v9ses, dir, dentry, NULL, perm, 821e43ae79cSMiklos Szeredi v9fs_uflags2omode(flags, 822e43ae79cSMiklos Szeredi v9fs_proto_dotu(v9ses))); 823e43ae79cSMiklos Szeredi if (IS_ERR(fid)) { 824e43ae79cSMiklos Szeredi err = PTR_ERR(fid); 825e43ae79cSMiklos Szeredi goto error; 826e43ae79cSMiklos Szeredi } 827e43ae79cSMiklos Szeredi 828e43ae79cSMiklos Szeredi v9fs_invalidate_inode_attr(dir); 829987a6485SGreg Kurz inode = d_inode(dentry); 830987a6485SGreg Kurz v9inode = V9FS_I(inode); 831e43ae79cSMiklos Szeredi mutex_lock(&v9inode->v_mutex); 832*d9bc0d11SEric Van Hensbergen if ((v9ses->cache >= CACHE_WRITEBACK) && !v9inode->writeback_fid && 833e43ae79cSMiklos Szeredi ((flags & O_ACCMODE) != O_RDONLY)) { 834e43ae79cSMiklos Szeredi /* 835e43ae79cSMiklos Szeredi * clone a fid and add it to writeback_fid 836e43ae79cSMiklos Szeredi * we do it during open time instead of 837e43ae79cSMiklos Szeredi * page dirty time via write_begin/page_mkwrite 838e43ae79cSMiklos Szeredi * because we want write after unlink usecase 839e43ae79cSMiklos Szeredi * to work. 840e43ae79cSMiklos Szeredi */ 841e43ae79cSMiklos Szeredi inode_fid = v9fs_writeback_fid(dentry); 842e43ae79cSMiklos Szeredi if (IS_ERR(inode_fid)) { 843e43ae79cSMiklos Szeredi err = PTR_ERR(inode_fid); 844e43ae79cSMiklos Szeredi mutex_unlock(&v9inode->v_mutex); 845e43ae79cSMiklos Szeredi goto error; 846e43ae79cSMiklos Szeredi } 847e43ae79cSMiklos Szeredi v9inode->writeback_fid = (void *) inode_fid; 848e43ae79cSMiklos Szeredi } 849e43ae79cSMiklos Szeredi mutex_unlock(&v9inode->v_mutex); 850be12af3eSAl Viro err = finish_open(file, dentry, generic_file_open); 85130d90494SAl Viro if (err) 852e43ae79cSMiklos Szeredi goto error; 853e43ae79cSMiklos Szeredi 85430d90494SAl Viro file->private_data = fid; 855fb89b45cSDominique Martinet if (v9ses->cache == CACHE_LOOSE || v9ses->cache == CACHE_FSCACHE) 85624e42e32SDavid Howells fscache_use_cookie(v9fs_inode_cookie(v9inode), 85724e42e32SDavid Howells file->f_mode & FMODE_WRITE); 858dafbe689SDominique Martinet v9fs_open_fid_add(inode, &fid); 859e43ae79cSMiklos Szeredi 86073a09dd9SAl Viro file->f_mode |= FMODE_CREATED; 861e43ae79cSMiklos Szeredi out: 862e43ae79cSMiklos Szeredi dput(res); 863d9585277SAl Viro return err; 864e43ae79cSMiklos Szeredi 865e43ae79cSMiklos Szeredi error: 866b48dbb99SDominique Martinet p9_fid_put(fid); 867e43ae79cSMiklos Szeredi goto out; 868e43ae79cSMiklos Szeredi } 869e43ae79cSMiklos Szeredi 8702bad8471SEric Van Hensbergen /** 8712bad8471SEric Van Hensbergen * v9fs_vfs_unlink - VFS unlink hook to delete an inode 8722bad8471SEric Van Hensbergen * @i: inode that is being unlinked 87373c592b9SEric Van Hensbergen * @d: dentry that is being unlinked 8742bad8471SEric Van Hensbergen * 8752bad8471SEric Van Hensbergen */ 8762bad8471SEric Van Hensbergen 87753c06f4eSAneesh Kumar K.V int v9fs_vfs_unlink(struct inode *i, struct dentry *d) 8782bad8471SEric Van Hensbergen { 8792bad8471SEric Van Hensbergen return v9fs_remove(i, d, 0); 8802bad8471SEric Van Hensbergen } 8812bad8471SEric Van Hensbergen 8822bad8471SEric Van Hensbergen /** 8832bad8471SEric Van Hensbergen * v9fs_vfs_rmdir - VFS unlink hook to delete a directory 8842bad8471SEric Van Hensbergen * @i: inode that is being unlinked 88573c592b9SEric Van Hensbergen * @d: dentry that is being unlinked 8862bad8471SEric Van Hensbergen * 8872bad8471SEric Van Hensbergen */ 8882bad8471SEric Van Hensbergen 88953c06f4eSAneesh Kumar K.V int v9fs_vfs_rmdir(struct inode *i, struct dentry *d) 8902bad8471SEric Van Hensbergen { 89148e370ffSAneesh Kumar K.V return v9fs_remove(i, d, AT_REMOVEDIR); 8922bad8471SEric Van Hensbergen } 8932bad8471SEric Van Hensbergen 8942bad8471SEric Van Hensbergen /** 8952bad8471SEric Van Hensbergen * v9fs_vfs_rename - VFS hook to rename an inode 896e18275aeSChristian Brauner * @idmap: The idmap of the mount 8972bad8471SEric Van Hensbergen * @old_dir: old dir inode 8982bad8471SEric Van Hensbergen * @old_dentry: old dentry 8992bad8471SEric Van Hensbergen * @new_dir: new dir inode 9002bad8471SEric Van Hensbergen * @new_dentry: new dentry 901bc868036SDavid Howells * @flags: RENAME_* flags 9022bad8471SEric Van Hensbergen * 9032bad8471SEric Van Hensbergen */ 9042bad8471SEric Van Hensbergen 90553c06f4eSAneesh Kumar K.V int 906e18275aeSChristian Brauner v9fs_vfs_rename(struct mnt_idmap *idmap, struct inode *old_dir, 907549c7297SChristian Brauner struct dentry *old_dentry, struct inode *new_dir, 908549c7297SChristian Brauner struct dentry *new_dentry, unsigned int flags) 9092bad8471SEric Van Hensbergen { 910d28c61f0SAneesh Kumar K.V int retval; 911bd238fb4SLatchesar Ionkov struct inode *old_inode; 912b271ec47SAneesh Kumar K.V struct inode *new_inode; 913bd238fb4SLatchesar Ionkov struct v9fs_session_info *v9ses; 914dafbe689SDominique Martinet struct p9_fid *oldfid = NULL, *dfid = NULL; 915dafbe689SDominique Martinet struct p9_fid *olddirfid = NULL; 916dafbe689SDominique Martinet struct p9_fid *newdirfid = NULL; 917bd238fb4SLatchesar Ionkov struct p9_wstat wstat; 9182bad8471SEric Van Hensbergen 9191cd66c93SMiklos Szeredi if (flags) 9201cd66c93SMiklos Szeredi return -EINVAL; 9211cd66c93SMiklos Szeredi 9225d385153SJoe Perches p9_debug(P9_DEBUG_VFS, "\n"); 923bd238fb4SLatchesar Ionkov retval = 0; 9242b0143b5SDavid Howells old_inode = d_inode(old_dentry); 9252b0143b5SDavid Howells new_inode = d_inode(new_dentry); 926bd238fb4SLatchesar Ionkov v9ses = v9fs_inode2v9ses(old_inode); 927bd238fb4SLatchesar Ionkov oldfid = v9fs_fid_lookup(old_dentry); 928da977b2cSEric Van Hensbergen if (IS_ERR(oldfid)) 929da977b2cSEric Van Hensbergen return PTR_ERR(oldfid); 930da977b2cSEric Van Hensbergen 9316636b6dcSJianyong Wu dfid = v9fs_parent_fid(old_dentry); 9326636b6dcSJianyong Wu olddirfid = clone_fid(dfid); 933b48dbb99SDominique Martinet p9_fid_put(dfid); 934dafbe689SDominique Martinet dfid = NULL; 9356636b6dcSJianyong Wu 936da977b2cSEric Van Hensbergen if (IS_ERR(olddirfid)) { 937da977b2cSEric Van Hensbergen retval = PTR_ERR(olddirfid); 938dafbe689SDominique Martinet goto error; 939da977b2cSEric Van Hensbergen } 940da977b2cSEric Van Hensbergen 9416636b6dcSJianyong Wu dfid = v9fs_parent_fid(new_dentry); 9426636b6dcSJianyong Wu newdirfid = clone_fid(dfid); 943b48dbb99SDominique Martinet p9_fid_put(dfid); 944dafbe689SDominique Martinet dfid = NULL; 9456636b6dcSJianyong Wu 946da977b2cSEric Van Hensbergen if (IS_ERR(newdirfid)) { 947da977b2cSEric Van Hensbergen retval = PTR_ERR(newdirfid); 948dafbe689SDominique Martinet goto error; 9492bad8471SEric Van Hensbergen } 9502bad8471SEric Van Hensbergen 951a534c8d1SAneesh Kumar K.V down_write(&v9ses->rename_sem); 9524681dbdaSSripathi Kodi if (v9fs_proto_dotl(v9ses)) { 9539e8fb38eSAneesh Kumar K.V retval = p9_client_renameat(olddirfid, old_dentry->d_name.name, 9549e8fb38eSAneesh Kumar K.V newdirfid, new_dentry->d_name.name); 9559e8fb38eSAneesh Kumar K.V if (retval == -EOPNOTSUPP) 9564681dbdaSSripathi Kodi retval = p9_client_rename(oldfid, newdirfid, 9579e8fb38eSAneesh Kumar K.V new_dentry->d_name.name); 9589e8fb38eSAneesh Kumar K.V if (retval != -EOPNOTSUPP) 959dafbe689SDominique Martinet goto error_locked; 9604681dbdaSSripathi Kodi } 961a534c8d1SAneesh Kumar K.V if (old_dentry->d_parent != new_dentry->d_parent) { 962a534c8d1SAneesh Kumar K.V /* 963a534c8d1SAneesh Kumar K.V * 9P .u can only handle file rename in the same directory 964a534c8d1SAneesh Kumar K.V */ 9654681dbdaSSripathi Kodi 9665d385153SJoe Perches p9_debug(P9_DEBUG_ERROR, "old dir and new dir are different\n"); 967621997cdSEric Van Hensbergen retval = -EXDEV; 968dafbe689SDominique Martinet goto error_locked; 9692bad8471SEric Van Hensbergen } 970531b1094SLatchesar Ionkov v9fs_blank_wstat(&wstat); 971ba17674fSLatchesar Ionkov wstat.muid = v9ses->uname; 9727880b43bSAl Viro wstat.name = new_dentry->d_name.name; 973bd238fb4SLatchesar Ionkov retval = p9_client_wstat(oldfid, &wstat); 9742bad8471SEric Van Hensbergen 975dafbe689SDominique Martinet error_locked: 976b271ec47SAneesh Kumar K.V if (!retval) { 977b271ec47SAneesh Kumar K.V if (new_inode) { 978b271ec47SAneesh Kumar K.V if (S_ISDIR(new_inode->i_mode)) 979b271ec47SAneesh Kumar K.V clear_nlink(new_inode); 980b271ec47SAneesh Kumar K.V else 981ac89b2efSEryu Guan v9fs_dec_count(new_inode); 982b271ec47SAneesh Kumar K.V } 983b271ec47SAneesh Kumar K.V if (S_ISDIR(old_inode->i_mode)) { 984b271ec47SAneesh Kumar K.V if (!new_inode) 985b271ec47SAneesh Kumar K.V inc_nlink(new_dir); 986ac89b2efSEryu Guan v9fs_dec_count(old_dir); 987b271ec47SAneesh Kumar K.V } 9883bc86de3SAneesh Kumar K.V v9fs_invalidate_inode_attr(old_inode); 989d28c61f0SAneesh Kumar K.V v9fs_invalidate_inode_attr(old_dir); 990d28c61f0SAneesh Kumar K.V v9fs_invalidate_inode_attr(new_dir); 9913bc86de3SAneesh Kumar K.V 992a534c8d1SAneesh Kumar K.V /* successful rename */ 993a534c8d1SAneesh Kumar K.V d_move(old_dentry, new_dentry); 994b271ec47SAneesh Kumar K.V } 995a534c8d1SAneesh Kumar K.V up_write(&v9ses->rename_sem); 996dafbe689SDominique Martinet 997dafbe689SDominique Martinet error: 998b48dbb99SDominique Martinet p9_fid_put(newdirfid); 999b48dbb99SDominique Martinet p9_fid_put(olddirfid); 1000b48dbb99SDominique Martinet p9_fid_put(oldfid); 10012bad8471SEric Van Hensbergen return retval; 10022bad8471SEric Van Hensbergen } 10032bad8471SEric Van Hensbergen 10042bad8471SEric Van Hensbergen /** 1005943ffb58SAdrian Bunk * v9fs_vfs_getattr - retrieve file metadata 1006b74d24f7SChristian Brauner * @idmap: idmap of the mount 1007a528d35eSDavid Howells * @path: Object to query 1008ee443996SEric Van Hensbergen * @stat: metadata structure to populate 1009a528d35eSDavid Howells * @request_mask: Mask of STATX_xxx flags indicating the caller's interests 1010a528d35eSDavid Howells * @flags: AT_STATX_xxx setting 10112bad8471SEric Van Hensbergen * 10122bad8471SEric Van Hensbergen */ 10132bad8471SEric Van Hensbergen 10142bad8471SEric Van Hensbergen static int 1015b74d24f7SChristian Brauner v9fs_vfs_getattr(struct mnt_idmap *idmap, const struct path *path, 1016549c7297SChristian Brauner struct kstat *stat, u32 request_mask, unsigned int flags) 10172bad8471SEric Van Hensbergen { 1018a528d35eSDavid Howells struct dentry *dentry = path->dentry; 1019*d9bc0d11SEric Van Hensbergen struct inode *inode = d_inode(dentry); 1020bd238fb4SLatchesar Ionkov struct v9fs_session_info *v9ses; 1021bd238fb4SLatchesar Ionkov struct p9_fid *fid; 102251a87c55SEric Van Hensbergen struct p9_wstat *st; 10232bad8471SEric Van Hensbergen 10245d385153SJoe Perches p9_debug(P9_DEBUG_VFS, "dentry: %p\n", dentry); 102542869c8aSAneesh Kumar K.V v9ses = v9fs_dentry2v9ses(dentry); 1026a1211908SAneesh Kumar K.V if (v9ses->cache == CACHE_LOOSE || v9ses->cache == CACHE_FSCACHE) { 1027b74d24f7SChristian Brauner generic_fillattr(&nop_mnt_idmap, d_inode(dentry), stat); 1028a1211908SAneesh Kumar K.V return 0; 1029*d9bc0d11SEric Van Hensbergen } else if (v9ses->cache >= CACHE_WRITEBACK) { 1030*d9bc0d11SEric Van Hensbergen if (S_ISREG(inode->i_mode)) { 1031*d9bc0d11SEric Van Hensbergen int retval = filemap_fdatawrite(inode->i_mapping); 1032*d9bc0d11SEric Van Hensbergen 1033*d9bc0d11SEric Van Hensbergen if (retval) 1034*d9bc0d11SEric Van Hensbergen p9_debug(P9_DEBUG_ERROR, 1035*d9bc0d11SEric Van Hensbergen "flushing writeback during getattr returned %d\n", retval); 1036*d9bc0d11SEric Van Hensbergen } 1037a1211908SAneesh Kumar K.V } 1038bd238fb4SLatchesar Ionkov fid = v9fs_fid_lookup(dentry); 1039da977b2cSEric Van Hensbergen if (IS_ERR(fid)) 1040da977b2cSEric Van Hensbergen return PTR_ERR(fid); 10412bad8471SEric Van Hensbergen 1042bd238fb4SLatchesar Ionkov st = p9_client_stat(fid); 1043b48dbb99SDominique Martinet p9_fid_put(fid); 1044bd238fb4SLatchesar Ionkov if (IS_ERR(st)) 1045bd238fb4SLatchesar Ionkov return PTR_ERR(st); 10462bad8471SEric Van Hensbergen 10475e3cc1eeSHou Tao v9fs_stat2inode(st, d_inode(dentry), dentry->d_sb, 0); 1048b74d24f7SChristian Brauner generic_fillattr(&nop_mnt_idmap, d_inode(dentry), stat); 10492bad8471SEric Van Hensbergen 105062b2be59SLatchesar Ionkov p9stat_free(st); 1051bd238fb4SLatchesar Ionkov kfree(st); 1052bd238fb4SLatchesar Ionkov return 0; 10532bad8471SEric Van Hensbergen } 10542bad8471SEric Van Hensbergen 10552bad8471SEric Van Hensbergen /** 10562bad8471SEric Van Hensbergen * v9fs_vfs_setattr - set file metadata 1057c1632a0fSChristian Brauner * @idmap: idmap of the mount 10582bad8471SEric Van Hensbergen * @dentry: file whose metadata to set 10592bad8471SEric Van Hensbergen * @iattr: metadata assignment structure 10602bad8471SEric Van Hensbergen * 10612bad8471SEric Van Hensbergen */ 10622bad8471SEric Van Hensbergen 1063c1632a0fSChristian Brauner static int v9fs_vfs_setattr(struct mnt_idmap *idmap, 1064549c7297SChristian Brauner struct dentry *dentry, struct iattr *iattr) 10652bad8471SEric Van Hensbergen { 10666636b6dcSJianyong Wu int retval, use_dentry = 0; 106724e42e32SDavid Howells struct inode *inode = d_inode(dentry); 106824e42e32SDavid Howells struct v9fs_inode *v9inode = V9FS_I(inode); 1069bd238fb4SLatchesar Ionkov struct v9fs_session_info *v9ses; 107066246641SJianyong Wu struct p9_fid *fid = NULL; 1071bd238fb4SLatchesar Ionkov struct p9_wstat wstat; 10722bad8471SEric Van Hensbergen 10735d385153SJoe Perches p9_debug(P9_DEBUG_VFS, "\n"); 1074c1632a0fSChristian Brauner retval = setattr_prepare(&nop_mnt_idmap, dentry, iattr); 1075059c138bSAneesh Kumar K.V if (retval) 1076059c138bSAneesh Kumar K.V return retval; 1077059c138bSAneesh Kumar K.V 1078bd238fb4SLatchesar Ionkov retval = -EPERM; 107942869c8aSAneesh Kumar K.V v9ses = v9fs_dentry2v9ses(dentry); 108066246641SJianyong Wu if (iattr->ia_valid & ATTR_FILE) { 108166246641SJianyong Wu fid = iattr->ia_file->private_data; 108266246641SJianyong Wu WARN_ON(!fid); 108366246641SJianyong Wu } 10846636b6dcSJianyong Wu if (!fid) { 1085bd238fb4SLatchesar Ionkov fid = v9fs_fid_lookup(dentry); 10866636b6dcSJianyong Wu use_dentry = 1; 10876636b6dcSJianyong Wu } 1088da977b2cSEric Van Hensbergen if (IS_ERR(fid)) 1089da977b2cSEric Van Hensbergen return PTR_ERR(fid); 10902bad8471SEric Van Hensbergen 1091531b1094SLatchesar Ionkov v9fs_blank_wstat(&wstat); 10922bad8471SEric Van Hensbergen if (iattr->ia_valid & ATTR_MODE) 1093531b1094SLatchesar Ionkov wstat.mode = unixmode2p9mode(v9ses, iattr->ia_mode); 10942bad8471SEric Van Hensbergen 10952bad8471SEric Van Hensbergen if (iattr->ia_valid & ATTR_MTIME) 1096531b1094SLatchesar Ionkov wstat.mtime = iattr->ia_mtime.tv_sec; 10972bad8471SEric Van Hensbergen 10982bad8471SEric Van Hensbergen if (iattr->ia_valid & ATTR_ATIME) 1099531b1094SLatchesar Ionkov wstat.atime = iattr->ia_atime.tv_sec; 11002bad8471SEric Van Hensbergen 11012bad8471SEric Van Hensbergen if (iattr->ia_valid & ATTR_SIZE) 1102531b1094SLatchesar Ionkov wstat.length = iattr->ia_size; 11032bad8471SEric Van Hensbergen 1104dd6102fbSSripathi Kodi if (v9fs_proto_dotu(v9ses)) { 1105531b1094SLatchesar Ionkov if (iattr->ia_valid & ATTR_UID) 1106531b1094SLatchesar Ionkov wstat.n_uid = iattr->ia_uid; 11072bad8471SEric Van Hensbergen 1108531b1094SLatchesar Ionkov if (iattr->ia_valid & ATTR_GID) 1109531b1094SLatchesar Ionkov wstat.n_gid = iattr->ia_gid; 11102bad8471SEric Van Hensbergen } 1111059c138bSAneesh Kumar K.V 11123dc5436aSAneesh Kumar K.V /* Write all dirty data */ 1113*d9bc0d11SEric Van Hensbergen if (d_is_reg(dentry)) { 1114*d9bc0d11SEric Van Hensbergen retval = filemap_fdatawrite(inode->i_mapping); 1115*d9bc0d11SEric Van Hensbergen if (retval) 1116*d9bc0d11SEric Van Hensbergen p9_debug(P9_DEBUG_ERROR, 1117*d9bc0d11SEric Van Hensbergen "flushing writeback during setattr returned %d\n", retval); 1118*d9bc0d11SEric Van Hensbergen } 11193dc5436aSAneesh Kumar K.V 1120f10fc50fSAneesh Kumar K.V retval = p9_client_wstat(fid, &wstat); 11216636b6dcSJianyong Wu 11226636b6dcSJianyong Wu if (use_dentry) 1123b48dbb99SDominique Martinet p9_fid_put(fid); 11246636b6dcSJianyong Wu 1125f10fc50fSAneesh Kumar K.V if (retval < 0) 1126f10fc50fSAneesh Kumar K.V return retval; 1127059c138bSAneesh Kumar K.V 1128059c138bSAneesh Kumar K.V if ((iattr->ia_valid & ATTR_SIZE) && 112924e42e32SDavid Howells iattr->ia_size != i_size_read(inode)) { 113024e42e32SDavid Howells truncate_setsize(inode, iattr->ia_size); 1131*d9bc0d11SEric Van Hensbergen if (v9ses->cache == CACHE_FSCACHE) 113224e42e32SDavid Howells fscache_resize_cookie(v9fs_inode_cookie(v9inode), iattr->ia_size); 1133*d9bc0d11SEric Van Hensbergen else 1134*d9bc0d11SEric Van Hensbergen invalidate_mapping_pages(&inode->i_data, 0, -1); 113524e42e32SDavid Howells } 1136059c138bSAneesh Kumar K.V 113724e42e32SDavid Howells v9fs_invalidate_inode_attr(inode); 11381025774cSChristoph Hellwig 1139c1632a0fSChristian Brauner setattr_copy(&nop_mnt_idmap, inode, iattr); 114024e42e32SDavid Howells mark_inode_dirty(inode); 11411025774cSChristoph Hellwig return 0; 11422bad8471SEric Van Hensbergen } 11432bad8471SEric Van Hensbergen 11442bad8471SEric Van Hensbergen /** 1145531b1094SLatchesar Ionkov * v9fs_stat2inode - populate an inode structure with mistat info 1146531b1094SLatchesar Ionkov * @stat: Plan 9 metadata (mistat) structure 11472bad8471SEric Van Hensbergen * @inode: inode to populate 11482bad8471SEric Van Hensbergen * @sb: superblock of filesystem 11495e3cc1eeSHou Tao * @flags: control flags (e.g. V9FS_STAT2INODE_KEEP_ISIZE) 11502bad8471SEric Van Hensbergen * 11512bad8471SEric Van Hensbergen */ 11522bad8471SEric Van Hensbergen 11532bad8471SEric Van Hensbergen void 115451a87c55SEric Van Hensbergen v9fs_stat2inode(struct p9_wstat *stat, struct inode *inode, 11555e3cc1eeSHou Tao struct super_block *sb, unsigned int flags) 11562bad8471SEric Van Hensbergen { 11573eda0de6SAl Viro umode_t mode; 11582bad8471SEric Van Hensbergen struct v9fs_session_info *v9ses = sb->s_fs_info; 1159b3cbea03SAneesh Kumar K.V struct v9fs_inode *v9inode = V9FS_I(inode); 11602bad8471SEric Van Hensbergen 1161bfe86848SMiklos Szeredi set_nlink(inode, 1); 11622bad8471SEric Van Hensbergen 1163531b1094SLatchesar Ionkov inode->i_atime.tv_sec = stat->atime; 1164531b1094SLatchesar Ionkov inode->i_mtime.tv_sec = stat->mtime; 1165531b1094SLatchesar Ionkov inode->i_ctime.tv_sec = stat->mtime; 11662bad8471SEric Van Hensbergen 1167bd32b82dSLatchesar Ionkov inode->i_uid = v9ses->dfltuid; 1168bd32b82dSLatchesar Ionkov inode->i_gid = v9ses->dfltgid; 11692bad8471SEric Van Hensbergen 1170dd6102fbSSripathi Kodi if (v9fs_proto_dotu(v9ses)) { 1171531b1094SLatchesar Ionkov inode->i_uid = stat->n_uid; 1172531b1094SLatchesar Ionkov inode->i_gid = stat->n_gid; 1173531b1094SLatchesar Ionkov } 11745717144aSAneesh Kumar K.V if ((S_ISREG(inode->i_mode)) || (S_ISDIR(inode->i_mode))) { 11759652c732SAl Viro if (v9fs_proto_dotu(v9ses)) { 11769652c732SAl Viro unsigned int i_nlink; 11775717144aSAneesh Kumar K.V /* 11789652c732SAl Viro * Hadlink support got added later to the .u extension. 11799652c732SAl Viro * So there can be a server out there that doesn't 11809652c732SAl Viro * support this even with .u extension. That would 11819652c732SAl Viro * just leave us with stat->extension being an empty 11829652c732SAl Viro * string, though. 11835717144aSAneesh Kumar K.V */ 11845717144aSAneesh Kumar K.V /* HARDLINKCOUNT %u */ 11859652c732SAl Viro if (sscanf(stat->extension, 11869652c732SAl Viro " HARDLINKCOUNT %u", &i_nlink) == 1) 1187bfe86848SMiklos Szeredi set_nlink(inode, i_nlink); 11885717144aSAneesh Kumar K.V } 11895717144aSAneesh Kumar K.V } 1190df345c67SAneesh Kumar K.V mode = p9mode2perm(v9ses, stat); 119145089142SAneesh Kumar K.V mode |= inode->i_mode & ~S_IALLUGO; 119245089142SAneesh Kumar K.V inode->i_mode = mode; 11932bad8471SEric Van Hensbergen 11945e3cc1eeSHou Tao if (!(flags & V9FS_STAT2INODE_KEEP_ISIZE)) 11955e3cc1eeSHou Tao v9fs_i_size_write(inode, stat->length); 1196bd238fb4SLatchesar Ionkov /* not real number of blocks, but 512 byte ones ... */ 11975e3cc1eeSHou Tao inode->i_blocks = (stat->length + 512 - 1) >> 9; 1198b3cbea03SAneesh Kumar K.V v9inode->cache_validity &= ~V9FS_INO_INVALID_ATTR; 11992bad8471SEric Van Hensbergen } 12002bad8471SEric Van Hensbergen 12012bad8471SEric Van Hensbergen /** 12022bad8471SEric Van Hensbergen * v9fs_qid2ino - convert qid into inode number 12032bad8471SEric Van Hensbergen * @qid: qid to hash 12042bad8471SEric Van Hensbergen * 12052bad8471SEric Van Hensbergen * BUG: potential for inode number collisions? 12062bad8471SEric Van Hensbergen */ 12072bad8471SEric Van Hensbergen 1208bd238fb4SLatchesar Ionkov ino_t v9fs_qid2ino(struct p9_qid *qid) 12092bad8471SEric Van Hensbergen { 12102bad8471SEric Van Hensbergen u64 path = qid->path + 2; 12112bad8471SEric Van Hensbergen ino_t i = 0; 12122bad8471SEric Van Hensbergen 12132bad8471SEric Van Hensbergen if (sizeof(ino_t) == sizeof(path)) 12142bad8471SEric Van Hensbergen memcpy(&i, &path, sizeof(ino_t)); 12152bad8471SEric Van Hensbergen else 12162bad8471SEric Van Hensbergen i = (ino_t) (path ^ (path >> 32)); 12172bad8471SEric Van Hensbergen 12182bad8471SEric Van Hensbergen return i; 12192bad8471SEric Van Hensbergen } 12202bad8471SEric Van Hensbergen 12212bad8471SEric Van Hensbergen /** 12226b255391SAl Viro * v9fs_vfs_get_link - follow a symlink path 12232bad8471SEric Van Hensbergen * @dentry: dentry for symlink 12246b255391SAl Viro * @inode: inode for symlink 1225fceef393SAl Viro * @done: delayed call for when we are done with the return value 12262bad8471SEric Van Hensbergen */ 12272bad8471SEric Van Hensbergen 12286b255391SAl Viro static const char *v9fs_vfs_get_link(struct dentry *dentry, 1229fceef393SAl Viro struct inode *inode, 1230fceef393SAl Viro struct delayed_call *done) 12312bad8471SEric Van Hensbergen { 12326b255391SAl Viro struct v9fs_session_info *v9ses; 12336b255391SAl Viro struct p9_fid *fid; 123490e4fc88SAl Viro struct p9_wstat *st; 1235680baacbSAl Viro char *res; 12362bad8471SEric Van Hensbergen 12376b255391SAl Viro if (!dentry) 12386b255391SAl Viro return ERR_PTR(-ECHILD); 12396b255391SAl Viro 12406b255391SAl Viro v9ses = v9fs_dentry2v9ses(dentry); 1241e5690f26SDominique Martinet if (!v9fs_proto_dotu(v9ses)) 1242e5690f26SDominique Martinet return ERR_PTR(-EBADF); 1243e5690f26SDominique Martinet 12444b8e9923SAl Viro p9_debug(P9_DEBUG_VFS, "%pd\n", dentry); 1245e5690f26SDominique Martinet fid = v9fs_fid_lookup(dentry); 12462bad8471SEric Van Hensbergen 124790e4fc88SAl Viro if (IS_ERR(fid)) 124890e4fc88SAl Viro return ERR_CAST(fid); 12492bad8471SEric Van Hensbergen 125090e4fc88SAl Viro st = p9_client_stat(fid); 1251b48dbb99SDominique Martinet p9_fid_put(fid); 125290e4fc88SAl Viro if (IS_ERR(st)) 125390e4fc88SAl Viro return ERR_CAST(st); 125490e4fc88SAl Viro 125590e4fc88SAl Viro if (!(st->mode & P9_DMSYMLINK)) { 125690e4fc88SAl Viro p9stat_free(st); 125790e4fc88SAl Viro kfree(st); 125890e4fc88SAl Viro return ERR_PTR(-EINVAL); 12592bad8471SEric Van Hensbergen } 1260680baacbSAl Viro res = st->extension; 126190e4fc88SAl Viro st->extension = NULL; 1262680baacbSAl Viro if (strlen(res) >= PATH_MAX) 1263680baacbSAl Viro res[PATH_MAX - 1] = '\0'; 1264680baacbSAl Viro 126590e4fc88SAl Viro p9stat_free(st); 126690e4fc88SAl Viro kfree(st); 1267fceef393SAl Viro set_delayed_call(done, kfree_link, res); 1268fceef393SAl Viro return res; 12692bad8471SEric Van Hensbergen } 12702bad8471SEric Van Hensbergen 12712bad8471SEric Van Hensbergen /** 1272ee443996SEric Van Hensbergen * v9fs_vfs_mkspecial - create a special file 1273ee443996SEric Van Hensbergen * @dir: inode to create special file in 1274ee443996SEric Van Hensbergen * @dentry: dentry to create 1275fd2916bdSFabian Frederick * @perm: mode to create special file 1276ee443996SEric Van Hensbergen * @extension: 9p2000.u format extension string representing special file 1277ee443996SEric Van Hensbergen * 1278ee443996SEric Van Hensbergen */ 1279ee443996SEric Van Hensbergen 1280531b1094SLatchesar Ionkov static int v9fs_vfs_mkspecial(struct inode *dir, struct dentry *dentry, 1281c2837de7SAl Viro u32 perm, const char *extension) 1282531b1094SLatchesar Ionkov { 1283bd238fb4SLatchesar Ionkov struct p9_fid *fid; 1284d28c61f0SAneesh Kumar K.V struct v9fs_session_info *v9ses; 1285531b1094SLatchesar Ionkov 12866a3124a3SLatchesar Ionkov v9ses = v9fs_inode2v9ses(dir); 1287dd6102fbSSripathi Kodi if (!v9fs_proto_dotu(v9ses)) { 12885d385153SJoe Perches p9_debug(P9_DEBUG_ERROR, "not extended\n"); 12896a3124a3SLatchesar Ionkov return -EPERM; 1290531b1094SLatchesar Ionkov } 1291531b1094SLatchesar Ionkov 1292bd238fb4SLatchesar Ionkov fid = v9fs_create(v9ses, dir, dentry, (char *) extension, perm, 1293bd238fb4SLatchesar Ionkov P9_OREAD); 1294bd238fb4SLatchesar Ionkov if (IS_ERR(fid)) 1295bd238fb4SLatchesar Ionkov return PTR_ERR(fid); 1296da977b2cSEric Van Hensbergen 1297d28c61f0SAneesh Kumar K.V v9fs_invalidate_inode_attr(dir); 1298b48dbb99SDominique Martinet p9_fid_put(fid); 12996a3124a3SLatchesar Ionkov return 0; 1300531b1094SLatchesar Ionkov } 1301531b1094SLatchesar Ionkov 1302531b1094SLatchesar Ionkov /** 1303531b1094SLatchesar Ionkov * v9fs_vfs_symlink - helper function to create symlinks 13047a77db95SChristian Brauner * @idmap: idmap of the mount 1305531b1094SLatchesar Ionkov * @dir: directory inode containing symlink 1306531b1094SLatchesar Ionkov * @dentry: dentry for symlink 1307531b1094SLatchesar Ionkov * @symname: symlink data 1308531b1094SLatchesar Ionkov * 1309ee443996SEric Van Hensbergen * See Also: 9P2000.u RFC for more information 1310531b1094SLatchesar Ionkov * 1311531b1094SLatchesar Ionkov */ 1312531b1094SLatchesar Ionkov 1313531b1094SLatchesar Ionkov static int 13147a77db95SChristian Brauner v9fs_vfs_symlink(struct mnt_idmap *idmap, struct inode *dir, 1315549c7297SChristian Brauner struct dentry *dentry, const char *symname) 1316531b1094SLatchesar Ionkov { 13174b8e9923SAl Viro p9_debug(P9_DEBUG_VFS, " %lu,%pd,%s\n", 13184b8e9923SAl Viro dir->i_ino, dentry, symname); 1319531b1094SLatchesar Ionkov 1320c2837de7SAl Viro return v9fs_vfs_mkspecial(dir, dentry, P9_DMSYMLINK, symname); 1321531b1094SLatchesar Ionkov } 1322531b1094SLatchesar Ionkov 1323b46c267eSAl Viro #define U32_MAX_DIGITS 10 1324b46c267eSAl Viro 13252bad8471SEric Van Hensbergen /** 13262bad8471SEric Van Hensbergen * v9fs_vfs_link - create a hardlink 13272bad8471SEric Van Hensbergen * @old_dentry: dentry for file to link to 13282bad8471SEric Van Hensbergen * @dir: inode destination for new link 132973c592b9SEric Van Hensbergen * @dentry: dentry for link 13302bad8471SEric Van Hensbergen * 13312bad8471SEric Van Hensbergen */ 13322bad8471SEric Van Hensbergen 13332bad8471SEric Van Hensbergen static int 13342bad8471SEric Van Hensbergen v9fs_vfs_link(struct dentry *old_dentry, struct inode *dir, 13352bad8471SEric Van Hensbergen struct dentry *dentry) 13362bad8471SEric Van Hensbergen { 1337531b1094SLatchesar Ionkov int retval; 1338b46c267eSAl Viro char name[1 + U32_MAX_DIGITS + 2]; /* sign + number + \n + \0 */ 1339d28c61f0SAneesh Kumar K.V struct p9_fid *oldfid; 13402bad8471SEric Van Hensbergen 13414b8e9923SAl Viro p9_debug(P9_DEBUG_VFS, " %lu,%pd,%pd\n", 13424b8e9923SAl Viro dir->i_ino, dentry, old_dentry); 13432bad8471SEric Van Hensbergen 1344da977b2cSEric Van Hensbergen oldfid = v9fs_fid_clone(old_dentry); 1345da977b2cSEric Van Hensbergen if (IS_ERR(oldfid)) 1346da977b2cSEric Van Hensbergen return PTR_ERR(oldfid); 13472bad8471SEric Van Hensbergen 134816cce6d2SLatchesar Ionkov sprintf(name, "%d\n", oldfid->fid); 1349bd238fb4SLatchesar Ionkov retval = v9fs_vfs_mkspecial(dir, dentry, P9_DMLINK, name); 1350c06c066aSAneesh Kumar K.V if (!retval) { 13512b0143b5SDavid Howells v9fs_refresh_inode(oldfid, d_inode(old_dentry)); 1352d28c61f0SAneesh Kumar K.V v9fs_invalidate_inode_attr(dir); 1353c06c066aSAneesh Kumar K.V } 1354b48dbb99SDominique Martinet p9_fid_put(oldfid); 13552bad8471SEric Van Hensbergen return retval; 13562bad8471SEric Van Hensbergen } 13572bad8471SEric Van Hensbergen 13582bad8471SEric Van Hensbergen /** 13592bad8471SEric Van Hensbergen * v9fs_vfs_mknod - create a special file 13605ebb29beSChristian Brauner * @idmap: idmap of the mount 13612bad8471SEric Van Hensbergen * @dir: inode destination for new link 13622bad8471SEric Van Hensbergen * @dentry: dentry for file 13632bad8471SEric Van Hensbergen * @mode: mode for creation 1364ee443996SEric Van Hensbergen * @rdev: device associated with special file 13652bad8471SEric Van Hensbergen * 13662bad8471SEric Van Hensbergen */ 13672bad8471SEric Van Hensbergen 13682bad8471SEric Van Hensbergen static int 13695ebb29beSChristian Brauner v9fs_vfs_mknod(struct mnt_idmap *idmap, struct inode *dir, 1370549c7297SChristian Brauner struct dentry *dentry, umode_t mode, dev_t rdev) 13712bad8471SEric Van Hensbergen { 1372c2837de7SAl Viro struct v9fs_session_info *v9ses = v9fs_inode2v9ses(dir); 1373531b1094SLatchesar Ionkov int retval; 1374b46c267eSAl Viro char name[2 + U32_MAX_DIGITS + 1 + U32_MAX_DIGITS + 1]; 1375c2837de7SAl Viro u32 perm; 13762bad8471SEric Van Hensbergen 13776e195b0fSDominique Martinet p9_debug(P9_DEBUG_VFS, " %lu,%pd mode: %x MAJOR: %u MINOR: %u\n", 13784b8e9923SAl Viro dir->i_ino, dentry, mode, 13795d385153SJoe Perches MAJOR(rdev), MINOR(rdev)); 13802bad8471SEric Van Hensbergen 13812bad8471SEric Van Hensbergen /* build extension */ 13822bad8471SEric Van Hensbergen if (S_ISBLK(mode)) 1383531b1094SLatchesar Ionkov sprintf(name, "b %u %u", MAJOR(rdev), MINOR(rdev)); 13842bad8471SEric Van Hensbergen else if (S_ISCHR(mode)) 1385531b1094SLatchesar Ionkov sprintf(name, "c %u %u", MAJOR(rdev), MINOR(rdev)); 1386b46c267eSAl Viro else 1387531b1094SLatchesar Ionkov *name = 0; 13882bad8471SEric Van Hensbergen 1389c2837de7SAl Viro perm = unixmode2p9mode(v9ses, mode); 1390c2837de7SAl Viro retval = v9fs_vfs_mkspecial(dir, dentry, perm, name); 13912bad8471SEric Van Hensbergen 13922bad8471SEric Van Hensbergen return retval; 13932bad8471SEric Van Hensbergen } 13942bad8471SEric Van Hensbergen 1395b3cbea03SAneesh Kumar K.V int v9fs_refresh_inode(struct p9_fid *fid, struct inode *inode) 1396b3cbea03SAneesh Kumar K.V { 139745089142SAneesh Kumar K.V int umode; 139845089142SAneesh Kumar K.V dev_t rdev; 1399b3cbea03SAneesh Kumar K.V struct p9_wstat *st; 1400b3cbea03SAneesh Kumar K.V struct v9fs_session_info *v9ses; 14015e3cc1eeSHou Tao unsigned int flags; 1402b3cbea03SAneesh Kumar K.V 1403b3cbea03SAneesh Kumar K.V v9ses = v9fs_inode2v9ses(inode); 1404b3cbea03SAneesh Kumar K.V st = p9_client_stat(fid); 1405b3cbea03SAneesh Kumar K.V if (IS_ERR(st)) 1406b3cbea03SAneesh Kumar K.V return PTR_ERR(st); 140745089142SAneesh Kumar K.V /* 140845089142SAneesh Kumar K.V * Don't update inode if the file type is different 140945089142SAneesh Kumar K.V */ 141045089142SAneesh Kumar K.V umode = p9mode2unixmode(v9ses, st, &rdev); 14116e3e2c43SAl Viro if (inode_wrong_type(inode, umode)) 141245089142SAneesh Kumar K.V goto out; 1413b3cbea03SAneesh Kumar K.V 1414b3cbea03SAneesh Kumar K.V /* 1415b3cbea03SAneesh Kumar K.V * We don't want to refresh inode->i_size, 1416b3cbea03SAneesh Kumar K.V * because we may have cached data 1417b3cbea03SAneesh Kumar K.V */ 14185e3cc1eeSHou Tao flags = (v9ses->cache == CACHE_LOOSE || v9ses->cache == CACHE_FSCACHE) ? 14195e3cc1eeSHou Tao V9FS_STAT2INODE_KEEP_ISIZE : 0; 14205e3cc1eeSHou Tao v9fs_stat2inode(st, inode, inode->i_sb, flags); 142145089142SAneesh Kumar K.V out: 1422b3cbea03SAneesh Kumar K.V p9stat_free(st); 1423b3cbea03SAneesh Kumar K.V kfree(st); 1424b3cbea03SAneesh Kumar K.V return 0; 1425b3cbea03SAneesh Kumar K.V } 1426b3cbea03SAneesh Kumar K.V 14279b6533c9SSripathi Kodi static const struct inode_operations v9fs_dir_inode_operations_dotu = { 14289b6533c9SSripathi Kodi .create = v9fs_vfs_create, 14299b6533c9SSripathi Kodi .lookup = v9fs_vfs_lookup, 1430e43ae79cSMiklos Szeredi .atomic_open = v9fs_vfs_atomic_open, 14319b6533c9SSripathi Kodi .symlink = v9fs_vfs_symlink, 143250cc42ffSVenkateswararao Jujjuri (JV) .link = v9fs_vfs_link, 14339b6533c9SSripathi Kodi .unlink = v9fs_vfs_unlink, 14349b6533c9SSripathi Kodi .mkdir = v9fs_vfs_mkdir, 14359b6533c9SSripathi Kodi .rmdir = v9fs_vfs_rmdir, 14361d76e313SAneesh Kumar K.V .mknod = v9fs_vfs_mknod, 14379b6533c9SSripathi Kodi .rename = v9fs_vfs_rename, 14389b6533c9SSripathi Kodi .getattr = v9fs_vfs_getattr, 14399b6533c9SSripathi Kodi .setattr = v9fs_vfs_setattr, 14409b6533c9SSripathi Kodi }; 14419b6533c9SSripathi Kodi 1442754661f1SArjan van de Ven static const struct inode_operations v9fs_dir_inode_operations = { 1443b501611aSEric Van Hensbergen .create = v9fs_vfs_create, 1444b501611aSEric Van Hensbergen .lookup = v9fs_vfs_lookup, 1445e43ae79cSMiklos Szeredi .atomic_open = v9fs_vfs_atomic_open, 1446b501611aSEric Van Hensbergen .unlink = v9fs_vfs_unlink, 1447b501611aSEric Van Hensbergen .mkdir = v9fs_vfs_mkdir, 1448b501611aSEric Van Hensbergen .rmdir = v9fs_vfs_rmdir, 1449b501611aSEric Van Hensbergen .mknod = v9fs_vfs_mknod, 1450b501611aSEric Van Hensbergen .rename = v9fs_vfs_rename, 1451b501611aSEric Van Hensbergen .getattr = v9fs_vfs_getattr, 1452b501611aSEric Van Hensbergen .setattr = v9fs_vfs_setattr, 1453b501611aSEric Van Hensbergen }; 1454b501611aSEric Van Hensbergen 1455754661f1SArjan van de Ven static const struct inode_operations v9fs_file_inode_operations = { 14562bad8471SEric Van Hensbergen .getattr = v9fs_vfs_getattr, 14572bad8471SEric Van Hensbergen .setattr = v9fs_vfs_setattr, 14582bad8471SEric Van Hensbergen }; 14592bad8471SEric Van Hensbergen 1460754661f1SArjan van de Ven static const struct inode_operations v9fs_symlink_inode_operations = { 14616b255391SAl Viro .get_link = v9fs_vfs_get_link, 14622bad8471SEric Van Hensbergen .getattr = v9fs_vfs_getattr, 14632bad8471SEric Van Hensbergen .setattr = v9fs_vfs_setattr, 14642bad8471SEric Van Hensbergen }; 14659b6533c9SSripathi Kodi 1466