11da177e4SLinus Torvalds /* dir.c: AFS filesystem directory handling 21da177e4SLinus Torvalds * 31da177e4SLinus Torvalds * Copyright (C) 2002 Red Hat, Inc. All Rights Reserved. 41da177e4SLinus Torvalds * Written by David Howells (dhowells@redhat.com) 51da177e4SLinus Torvalds * 61da177e4SLinus Torvalds * This program is free software; you can redistribute it and/or 71da177e4SLinus Torvalds * modify it under the terms of the GNU General Public License 81da177e4SLinus Torvalds * as published by the Free Software Foundation; either version 91da177e4SLinus Torvalds * 2 of the License, or (at your option) any later version. 101da177e4SLinus Torvalds */ 111da177e4SLinus Torvalds 121da177e4SLinus Torvalds #include <linux/kernel.h> 131da177e4SLinus Torvalds #include <linux/module.h> 141da177e4SLinus Torvalds #include <linux/init.h> 151da177e4SLinus Torvalds #include <linux/fs.h> 1634286d66SNick Piggin #include <linux/namei.h> 171da177e4SLinus Torvalds #include <linux/pagemap.h> 1800d3b7a4SDavid Howells #include <linux/ctype.h> 19e8edc6e0SAlexey Dobriyan #include <linux/sched.h> 201da177e4SLinus Torvalds #include "internal.h" 211da177e4SLinus Torvalds 22260a9803SDavid Howells static struct dentry *afs_lookup(struct inode *dir, struct dentry *dentry, 2300cd8dd3SAl Viro unsigned int flags); 241da177e4SLinus Torvalds static int afs_dir_open(struct inode *inode, struct file *file); 251bbae9f8SAl Viro static int afs_readdir(struct file *file, struct dir_context *ctx); 260b728e19SAl Viro static int afs_d_revalidate(struct dentry *dentry, unsigned int flags); 27fe15ce44SNick Piggin static int afs_d_delete(const struct dentry *dentry); 28260a9803SDavid Howells static void afs_d_release(struct dentry *dentry); 29ac7576f4SMiklos Szeredi static int afs_lookup_filldir(struct dir_context *ctx, const char *name, int nlen, 30afefdbb2SDavid Howells loff_t fpos, u64 ino, unsigned dtype); 314acdaf27SAl Viro static int afs_create(struct inode *dir, struct dentry *dentry, umode_t mode, 32ebfc3b49SAl Viro bool excl); 3318bb1db3SAl Viro static int afs_mkdir(struct inode *dir, struct dentry *dentry, umode_t mode); 34260a9803SDavid Howells static int afs_rmdir(struct inode *dir, struct dentry *dentry); 35260a9803SDavid Howells static int afs_unlink(struct inode *dir, struct dentry *dentry); 36260a9803SDavid Howells static int afs_link(struct dentry *from, struct inode *dir, 37260a9803SDavid Howells struct dentry *dentry); 38260a9803SDavid Howells static int afs_symlink(struct inode *dir, struct dentry *dentry, 39260a9803SDavid Howells const char *content); 40260a9803SDavid Howells static int afs_rename(struct inode *old_dir, struct dentry *old_dentry, 411cd66c93SMiklos Szeredi struct inode *new_dir, struct dentry *new_dentry, 421cd66c93SMiklos Szeredi unsigned int flags); 431da177e4SLinus Torvalds 444b6f5d20SArjan van de Ven const struct file_operations afs_dir_file_operations = { 451da177e4SLinus Torvalds .open = afs_dir_open, 4600d3b7a4SDavid Howells .release = afs_release, 4729884effSAl Viro .iterate_shared = afs_readdir, 48e8d6c554SDavid Howells .lock = afs_lock, 493222a3e5SChristoph Hellwig .llseek = generic_file_llseek, 501da177e4SLinus Torvalds }; 511da177e4SLinus Torvalds 52754661f1SArjan van de Ven const struct inode_operations afs_dir_inode_operations = { 53260a9803SDavid Howells .create = afs_create, 54260a9803SDavid Howells .lookup = afs_lookup, 55260a9803SDavid Howells .link = afs_link, 56260a9803SDavid Howells .unlink = afs_unlink, 57260a9803SDavid Howells .symlink = afs_symlink, 58260a9803SDavid Howells .mkdir = afs_mkdir, 59260a9803SDavid Howells .rmdir = afs_rmdir, 602773bf00SMiklos Szeredi .rename = afs_rename, 6100d3b7a4SDavid Howells .permission = afs_permission, 62416351f2SDavid Howells .getattr = afs_getattr, 6331143d5dSDavid Howells .setattr = afs_setattr, 64d3e3b7eaSDavid Howells .listxattr = afs_listxattr, 651da177e4SLinus Torvalds }; 661da177e4SLinus Torvalds 67d61dcce2SAl Viro const struct dentry_operations afs_fs_dentry_operations = { 681da177e4SLinus Torvalds .d_revalidate = afs_d_revalidate, 691da177e4SLinus Torvalds .d_delete = afs_d_delete, 70260a9803SDavid Howells .d_release = afs_d_release, 71d18610b0SDavid Howells .d_automount = afs_d_automount, 721da177e4SLinus Torvalds }; 731da177e4SLinus Torvalds 741da177e4SLinus Torvalds #define AFS_DIR_HASHTBL_SIZE 128 751da177e4SLinus Torvalds #define AFS_DIR_DIRENT_SIZE 32 761da177e4SLinus Torvalds #define AFS_DIRENT_PER_BLOCK 64 771da177e4SLinus Torvalds 781da177e4SLinus Torvalds union afs_dirent { 791da177e4SLinus Torvalds struct { 801da177e4SLinus Torvalds uint8_t valid; 811da177e4SLinus Torvalds uint8_t unused[1]; 821da177e4SLinus Torvalds __be16 hash_next; 831da177e4SLinus Torvalds __be32 vnode; 841da177e4SLinus Torvalds __be32 unique; 851da177e4SLinus Torvalds uint8_t name[16]; 861da177e4SLinus Torvalds uint8_t overflow[4]; /* if any char of the name (inc 871da177e4SLinus Torvalds * NUL) reaches here, consume 881da177e4SLinus Torvalds * the next dirent too */ 891da177e4SLinus Torvalds } u; 901da177e4SLinus Torvalds uint8_t extended_name[32]; 911da177e4SLinus Torvalds }; 921da177e4SLinus Torvalds 931da177e4SLinus Torvalds /* AFS directory page header (one at the beginning of every 2048-byte chunk) */ 941da177e4SLinus Torvalds struct afs_dir_pagehdr { 951da177e4SLinus Torvalds __be16 npages; 961da177e4SLinus Torvalds __be16 magic; 971da177e4SLinus Torvalds #define AFS_DIR_MAGIC htons(1234) 981da177e4SLinus Torvalds uint8_t nentries; 991da177e4SLinus Torvalds uint8_t bitmap[8]; 1001da177e4SLinus Torvalds uint8_t pad[19]; 1011da177e4SLinus Torvalds }; 1021da177e4SLinus Torvalds 1031da177e4SLinus Torvalds /* directory block layout */ 1041da177e4SLinus Torvalds union afs_dir_block { 1051da177e4SLinus Torvalds 1061da177e4SLinus Torvalds struct afs_dir_pagehdr pagehdr; 1071da177e4SLinus Torvalds 1081da177e4SLinus Torvalds struct { 1091da177e4SLinus Torvalds struct afs_dir_pagehdr pagehdr; 1101da177e4SLinus Torvalds uint8_t alloc_ctrs[128]; 1111da177e4SLinus Torvalds /* dir hash table */ 1121da177e4SLinus Torvalds uint16_t hashtable[AFS_DIR_HASHTBL_SIZE]; 1131da177e4SLinus Torvalds } hdr; 1141da177e4SLinus Torvalds 1151da177e4SLinus Torvalds union afs_dirent dirents[AFS_DIRENT_PER_BLOCK]; 1161da177e4SLinus Torvalds }; 1171da177e4SLinus Torvalds 1181da177e4SLinus Torvalds /* layout on a linux VM page */ 1191da177e4SLinus Torvalds struct afs_dir_page { 1201da177e4SLinus Torvalds union afs_dir_block blocks[PAGE_SIZE / sizeof(union afs_dir_block)]; 1211da177e4SLinus Torvalds }; 1221da177e4SLinus Torvalds 123260a9803SDavid Howells struct afs_lookup_cookie { 1241bbae9f8SAl Viro struct dir_context ctx; 1251da177e4SLinus Torvalds struct afs_fid fid; 1261bbae9f8SAl Viro struct qstr name; 1271da177e4SLinus Torvalds int found; 1281da177e4SLinus Torvalds }; 1291da177e4SLinus Torvalds 1301da177e4SLinus Torvalds /* 1311da177e4SLinus Torvalds * check that a directory page is valid 1321da177e4SLinus Torvalds */ 133be5b82dbSAl Viro static inline bool afs_dir_check_page(struct inode *dir, struct page *page) 1341da177e4SLinus Torvalds { 1351da177e4SLinus Torvalds struct afs_dir_page *dbuf; 1361da177e4SLinus Torvalds loff_t latter; 1371da177e4SLinus Torvalds int tmp, qty; 1381da177e4SLinus Torvalds 1391da177e4SLinus Torvalds #if 0 1401da177e4SLinus Torvalds /* check the page count */ 1411da177e4SLinus Torvalds qty = desc.size / sizeof(dbuf->blocks[0]); 1421da177e4SLinus Torvalds if (qty == 0) 1431da177e4SLinus Torvalds goto error; 1441da177e4SLinus Torvalds 1451da177e4SLinus Torvalds if (page->index == 0 && qty != ntohs(dbuf->blocks[0].pagehdr.npages)) { 1461da177e4SLinus Torvalds printk("kAFS: %s(%lu): wrong number of dir blocks %d!=%hu\n", 147530b6412SHarvey Harrison __func__, dir->i_ino, qty, 14808e0e7c8SDavid Howells ntohs(dbuf->blocks[0].pagehdr.npages)); 1491da177e4SLinus Torvalds goto error; 1501da177e4SLinus Torvalds } 1511da177e4SLinus Torvalds #endif 1521da177e4SLinus Torvalds 1531da177e4SLinus Torvalds /* determine how many magic numbers there should be in this page */ 15454b21a79SAndrew Morton latter = dir->i_size - page_offset(page); 1551da177e4SLinus Torvalds if (latter >= PAGE_SIZE) 1561da177e4SLinus Torvalds qty = PAGE_SIZE; 1571da177e4SLinus Torvalds else 1581da177e4SLinus Torvalds qty = latter; 1591da177e4SLinus Torvalds qty /= sizeof(union afs_dir_block); 1601da177e4SLinus Torvalds 1611da177e4SLinus Torvalds /* check them */ 1621da177e4SLinus Torvalds dbuf = page_address(page); 1631da177e4SLinus Torvalds for (tmp = 0; tmp < qty; tmp++) { 1641da177e4SLinus Torvalds if (dbuf->blocks[tmp].pagehdr.magic != AFS_DIR_MAGIC) { 1651da177e4SLinus Torvalds printk("kAFS: %s(%lu): bad magic %d/%d is %04hx\n", 166530b6412SHarvey Harrison __func__, dir->i_ino, tmp, qty, 1671da177e4SLinus Torvalds ntohs(dbuf->blocks[tmp].pagehdr.magic)); 1681da177e4SLinus Torvalds goto error; 1691da177e4SLinus Torvalds } 1701da177e4SLinus Torvalds } 1711da177e4SLinus Torvalds 1721da177e4SLinus Torvalds SetPageChecked(page); 173be5b82dbSAl Viro return true; 1741da177e4SLinus Torvalds 1751da177e4SLinus Torvalds error: 1761da177e4SLinus Torvalds SetPageError(page); 177be5b82dbSAl Viro return false; 178ec26815aSDavid Howells } 1791da177e4SLinus Torvalds 1801da177e4SLinus Torvalds /* 1811da177e4SLinus Torvalds * discard a page cached in the pagecache 1821da177e4SLinus Torvalds */ 1831da177e4SLinus Torvalds static inline void afs_dir_put_page(struct page *page) 1841da177e4SLinus Torvalds { 1851da177e4SLinus Torvalds kunmap(page); 18609cbfeafSKirill A. Shutemov put_page(page); 187ec26815aSDavid Howells } 1881da177e4SLinus Torvalds 1891da177e4SLinus Torvalds /* 1901da177e4SLinus Torvalds * get a page into the pagecache 1911da177e4SLinus Torvalds */ 19200d3b7a4SDavid Howells static struct page *afs_dir_get_page(struct inode *dir, unsigned long index, 19300d3b7a4SDavid Howells struct key *key) 1941da177e4SLinus Torvalds { 1951da177e4SLinus Torvalds struct page *page; 1961da177e4SLinus Torvalds _enter("{%lu},%lu", dir->i_ino, index); 1971da177e4SLinus Torvalds 198f6d335c0SAl Viro page = read_cache_page(dir->i_mapping, index, afs_page_filler, key); 1991da177e4SLinus Torvalds if (!IS_ERR(page)) { 2001da177e4SLinus Torvalds kmap(page); 201be5b82dbSAl Viro if (unlikely(!PageChecked(page))) { 202be5b82dbSAl Viro if (PageError(page) || !afs_dir_check_page(dir, page)) 2031da177e4SLinus Torvalds goto fail; 2041da177e4SLinus Torvalds } 205be5b82dbSAl Viro } 2061da177e4SLinus Torvalds return page; 2071da177e4SLinus Torvalds 2081da177e4SLinus Torvalds fail: 2091da177e4SLinus Torvalds afs_dir_put_page(page); 21008e0e7c8SDavid Howells _leave(" = -EIO"); 2111da177e4SLinus Torvalds return ERR_PTR(-EIO); 212ec26815aSDavid Howells } 2131da177e4SLinus Torvalds 2141da177e4SLinus Torvalds /* 2151da177e4SLinus Torvalds * open an AFS directory file 2161da177e4SLinus Torvalds */ 2171da177e4SLinus Torvalds static int afs_dir_open(struct inode *inode, struct file *file) 2181da177e4SLinus Torvalds { 2191da177e4SLinus Torvalds _enter("{%lu}", inode->i_ino); 2201da177e4SLinus Torvalds 2212ecd05aeSAlexey Dobriyan BUILD_BUG_ON(sizeof(union afs_dir_block) != 2048); 2222ecd05aeSAlexey Dobriyan BUILD_BUG_ON(sizeof(union afs_dirent) != 32); 2231da177e4SLinus Torvalds 22408e0e7c8SDavid Howells if (test_bit(AFS_VNODE_DELETED, &AFS_FS_I(inode)->flags)) 2251da177e4SLinus Torvalds return -ENOENT; 2261da177e4SLinus Torvalds 22700d3b7a4SDavid Howells return afs_open(inode, file); 228ec26815aSDavid Howells } 2291da177e4SLinus Torvalds 2301da177e4SLinus Torvalds /* 2311da177e4SLinus Torvalds * deal with one block in an AFS directory 2321da177e4SLinus Torvalds */ 2331bbae9f8SAl Viro static int afs_dir_iterate_block(struct dir_context *ctx, 2341da177e4SLinus Torvalds union afs_dir_block *block, 2351bbae9f8SAl Viro unsigned blkoff) 2361da177e4SLinus Torvalds { 2371da177e4SLinus Torvalds union afs_dirent *dire; 2381da177e4SLinus Torvalds unsigned offset, next, curr; 2391da177e4SLinus Torvalds size_t nlen; 2401bbae9f8SAl Viro int tmp; 2411da177e4SLinus Torvalds 2421bbae9f8SAl Viro _enter("%u,%x,%p,,",(unsigned)ctx->pos,blkoff,block); 2431da177e4SLinus Torvalds 2441bbae9f8SAl Viro curr = (ctx->pos - blkoff) / sizeof(union afs_dirent); 2451da177e4SLinus Torvalds 2461da177e4SLinus Torvalds /* walk through the block, an entry at a time */ 2471da177e4SLinus Torvalds for (offset = AFS_DIRENT_PER_BLOCK - block->pagehdr.nentries; 2481da177e4SLinus Torvalds offset < AFS_DIRENT_PER_BLOCK; 2491da177e4SLinus Torvalds offset = next 2501da177e4SLinus Torvalds ) { 2511da177e4SLinus Torvalds next = offset + 1; 2521da177e4SLinus Torvalds 2531da177e4SLinus Torvalds /* skip entries marked unused in the bitmap */ 2541da177e4SLinus Torvalds if (!(block->pagehdr.bitmap[offset / 8] & 2551da177e4SLinus Torvalds (1 << (offset % 8)))) { 2565b5e0928SAlexey Dobriyan _debug("ENT[%zu.%u]: unused", 2571da177e4SLinus Torvalds blkoff / sizeof(union afs_dir_block), offset); 2581da177e4SLinus Torvalds if (offset >= curr) 2591bbae9f8SAl Viro ctx->pos = blkoff + 2601da177e4SLinus Torvalds next * sizeof(union afs_dirent); 2611da177e4SLinus Torvalds continue; 2621da177e4SLinus Torvalds } 2631da177e4SLinus Torvalds 2641da177e4SLinus Torvalds /* got a valid entry */ 2651da177e4SLinus Torvalds dire = &block->dirents[offset]; 2661da177e4SLinus Torvalds nlen = strnlen(dire->u.name, 2671da177e4SLinus Torvalds sizeof(*block) - 2681da177e4SLinus Torvalds offset * sizeof(union afs_dirent)); 2691da177e4SLinus Torvalds 2705b5e0928SAlexey Dobriyan _debug("ENT[%zu.%u]: %s %zu \"%s\"", 2711da177e4SLinus Torvalds blkoff / sizeof(union afs_dir_block), offset, 2721da177e4SLinus Torvalds (offset < curr ? "skip" : "fill"), 2731da177e4SLinus Torvalds nlen, dire->u.name); 2741da177e4SLinus Torvalds 2751da177e4SLinus Torvalds /* work out where the next possible entry is */ 2761da177e4SLinus Torvalds for (tmp = nlen; tmp > 15; tmp -= sizeof(union afs_dirent)) { 2771da177e4SLinus Torvalds if (next >= AFS_DIRENT_PER_BLOCK) { 2785b5e0928SAlexey Dobriyan _debug("ENT[%zu.%u]:" 2791da177e4SLinus Torvalds " %u travelled beyond end dir block" 2805b5e0928SAlexey Dobriyan " (len %u/%zu)", 2811da177e4SLinus Torvalds blkoff / sizeof(union afs_dir_block), 2821da177e4SLinus Torvalds offset, next, tmp, nlen); 2831da177e4SLinus Torvalds return -EIO; 2841da177e4SLinus Torvalds } 2851da177e4SLinus Torvalds if (!(block->pagehdr.bitmap[next / 8] & 2861da177e4SLinus Torvalds (1 << (next % 8)))) { 2875b5e0928SAlexey Dobriyan _debug("ENT[%zu.%u]:" 2885b5e0928SAlexey Dobriyan " %u unmarked extension (len %u/%zu)", 2891da177e4SLinus Torvalds blkoff / sizeof(union afs_dir_block), 2901da177e4SLinus Torvalds offset, next, tmp, nlen); 2911da177e4SLinus Torvalds return -EIO; 2921da177e4SLinus Torvalds } 2931da177e4SLinus Torvalds 2945b5e0928SAlexey Dobriyan _debug("ENT[%zu.%u]: ext %u/%zu", 2951da177e4SLinus Torvalds blkoff / sizeof(union afs_dir_block), 2961da177e4SLinus Torvalds next, tmp, nlen); 2971da177e4SLinus Torvalds next++; 2981da177e4SLinus Torvalds } 2991da177e4SLinus Torvalds 3001da177e4SLinus Torvalds /* skip if starts before the current position */ 3011da177e4SLinus Torvalds if (offset < curr) 3021da177e4SLinus Torvalds continue; 3031da177e4SLinus Torvalds 3041da177e4SLinus Torvalds /* found the next entry */ 3051bbae9f8SAl Viro if (!dir_emit(ctx, dire->u.name, nlen, 3061da177e4SLinus Torvalds ntohl(dire->u.vnode), 3071bbae9f8SAl Viro ctx->actor == afs_lookup_filldir ? 3081bbae9f8SAl Viro ntohl(dire->u.unique) : DT_UNKNOWN)) { 3091da177e4SLinus Torvalds _leave(" = 0 [full]"); 3101da177e4SLinus Torvalds return 0; 3111da177e4SLinus Torvalds } 3121da177e4SLinus Torvalds 3131bbae9f8SAl Viro ctx->pos = blkoff + next * sizeof(union afs_dirent); 3141da177e4SLinus Torvalds } 3151da177e4SLinus Torvalds 3161da177e4SLinus Torvalds _leave(" = 1 [more]"); 3171da177e4SLinus Torvalds return 1; 318ec26815aSDavid Howells } 3191da177e4SLinus Torvalds 3201da177e4SLinus Torvalds /* 32108e0e7c8SDavid Howells * iterate through the data blob that lists the contents of an AFS directory 3221da177e4SLinus Torvalds */ 3231bbae9f8SAl Viro static int afs_dir_iterate(struct inode *dir, struct dir_context *ctx, 3241bbae9f8SAl Viro struct key *key) 3251da177e4SLinus Torvalds { 3261da177e4SLinus Torvalds union afs_dir_block *dblock; 3271da177e4SLinus Torvalds struct afs_dir_page *dbuf; 3281da177e4SLinus Torvalds struct page *page; 3291da177e4SLinus Torvalds unsigned blkoff, limit; 3301da177e4SLinus Torvalds int ret; 3311da177e4SLinus Torvalds 3321bbae9f8SAl Viro _enter("{%lu},%u,,", dir->i_ino, (unsigned)ctx->pos); 3331da177e4SLinus Torvalds 33408e0e7c8SDavid Howells if (test_bit(AFS_VNODE_DELETED, &AFS_FS_I(dir)->flags)) { 3351da177e4SLinus Torvalds _leave(" = -ESTALE"); 3361da177e4SLinus Torvalds return -ESTALE; 3371da177e4SLinus Torvalds } 3381da177e4SLinus Torvalds 3391da177e4SLinus Torvalds /* round the file position up to the next entry boundary */ 3401bbae9f8SAl Viro ctx->pos += sizeof(union afs_dirent) - 1; 3411bbae9f8SAl Viro ctx->pos &= ~(sizeof(union afs_dirent) - 1); 3421da177e4SLinus Torvalds 3431da177e4SLinus Torvalds /* walk through the blocks in sequence */ 3441da177e4SLinus Torvalds ret = 0; 3451bbae9f8SAl Viro while (ctx->pos < dir->i_size) { 3461bbae9f8SAl Viro blkoff = ctx->pos & ~(sizeof(union afs_dir_block) - 1); 3471da177e4SLinus Torvalds 3481da177e4SLinus Torvalds /* fetch the appropriate page from the directory */ 34900d3b7a4SDavid Howells page = afs_dir_get_page(dir, blkoff / PAGE_SIZE, key); 3501da177e4SLinus Torvalds if (IS_ERR(page)) { 3511da177e4SLinus Torvalds ret = PTR_ERR(page); 3521da177e4SLinus Torvalds break; 3531da177e4SLinus Torvalds } 3541da177e4SLinus Torvalds 3551da177e4SLinus Torvalds limit = blkoff & ~(PAGE_SIZE - 1); 3561da177e4SLinus Torvalds 3571da177e4SLinus Torvalds dbuf = page_address(page); 3581da177e4SLinus Torvalds 3591da177e4SLinus Torvalds /* deal with the individual blocks stashed on this page */ 3601da177e4SLinus Torvalds do { 3611da177e4SLinus Torvalds dblock = &dbuf->blocks[(blkoff % PAGE_SIZE) / 3621da177e4SLinus Torvalds sizeof(union afs_dir_block)]; 3631bbae9f8SAl Viro ret = afs_dir_iterate_block(ctx, dblock, blkoff); 3641da177e4SLinus Torvalds if (ret != 1) { 3651da177e4SLinus Torvalds afs_dir_put_page(page); 3661da177e4SLinus Torvalds goto out; 3671da177e4SLinus Torvalds } 3681da177e4SLinus Torvalds 3691da177e4SLinus Torvalds blkoff += sizeof(union afs_dir_block); 3701da177e4SLinus Torvalds 3711bbae9f8SAl Viro } while (ctx->pos < dir->i_size && blkoff < limit); 3721da177e4SLinus Torvalds 3731da177e4SLinus Torvalds afs_dir_put_page(page); 3741da177e4SLinus Torvalds ret = 0; 3751da177e4SLinus Torvalds } 3761da177e4SLinus Torvalds 3771da177e4SLinus Torvalds out: 3781da177e4SLinus Torvalds _leave(" = %d", ret); 3791da177e4SLinus Torvalds return ret; 380ec26815aSDavid Howells } 3811da177e4SLinus Torvalds 3821da177e4SLinus Torvalds /* 3831da177e4SLinus Torvalds * read an AFS directory 3841da177e4SLinus Torvalds */ 3851bbae9f8SAl Viro static int afs_readdir(struct file *file, struct dir_context *ctx) 3861da177e4SLinus Torvalds { 3871bbae9f8SAl Viro return afs_dir_iterate(file_inode(file), 3881bbae9f8SAl Viro ctx, file->private_data); 389ec26815aSDavid Howells } 3901da177e4SLinus Torvalds 3911da177e4SLinus Torvalds /* 3921da177e4SLinus Torvalds * search the directory for a name 3931da177e4SLinus Torvalds * - if afs_dir_iterate_block() spots this function, it'll pass the FID 3941da177e4SLinus Torvalds * uniquifier through dtype 3951da177e4SLinus Torvalds */ 396ac7576f4SMiklos Szeredi static int afs_lookup_filldir(struct dir_context *ctx, const char *name, 397ac7576f4SMiklos Szeredi int nlen, loff_t fpos, u64 ino, unsigned dtype) 3981da177e4SLinus Torvalds { 399ac7576f4SMiklos Szeredi struct afs_lookup_cookie *cookie = 400ac7576f4SMiklos Szeredi container_of(ctx, struct afs_lookup_cookie, ctx); 4011da177e4SLinus Torvalds 4021bbae9f8SAl Viro _enter("{%s,%u},%s,%u,,%llu,%u", 4031bbae9f8SAl Viro cookie->name.name, cookie->name.len, name, nlen, 404ba3e0e1aSDavid S. Miller (unsigned long long) ino, dtype); 4051da177e4SLinus Torvalds 40608e0e7c8SDavid Howells /* insanity checks first */ 40708e0e7c8SDavid Howells BUILD_BUG_ON(sizeof(union afs_dir_block) != 2048); 40808e0e7c8SDavid Howells BUILD_BUG_ON(sizeof(union afs_dirent) != 32); 40908e0e7c8SDavid Howells 4101bbae9f8SAl Viro if (cookie->name.len != nlen || 4111bbae9f8SAl Viro memcmp(cookie->name.name, name, nlen) != 0) { 4121da177e4SLinus Torvalds _leave(" = 0 [no]"); 4131da177e4SLinus Torvalds return 0; 4141da177e4SLinus Torvalds } 4151da177e4SLinus Torvalds 4161da177e4SLinus Torvalds cookie->fid.vnode = ino; 4171da177e4SLinus Torvalds cookie->fid.unique = dtype; 4181da177e4SLinus Torvalds cookie->found = 1; 4191da177e4SLinus Torvalds 4201da177e4SLinus Torvalds _leave(" = -1 [found]"); 4211da177e4SLinus Torvalds return -1; 422ec26815aSDavid Howells } 4231da177e4SLinus Torvalds 4241da177e4SLinus Torvalds /* 42508e0e7c8SDavid Howells * do a lookup in a directory 426260a9803SDavid Howells * - just returns the FID the dentry name maps to if found 4271da177e4SLinus Torvalds */ 42808e0e7c8SDavid Howells static int afs_do_lookup(struct inode *dir, struct dentry *dentry, 42900d3b7a4SDavid Howells struct afs_fid *fid, struct key *key) 4301da177e4SLinus Torvalds { 4311bbae9f8SAl Viro struct afs_super_info *as = dir->i_sb->s_fs_info; 4321bbae9f8SAl Viro struct afs_lookup_cookie cookie = { 4331bbae9f8SAl Viro .ctx.actor = afs_lookup_filldir, 4341bbae9f8SAl Viro .name = dentry->d_name, 4351bbae9f8SAl Viro .fid.vid = as->volume->vid 4361bbae9f8SAl Viro }; 4371da177e4SLinus Torvalds int ret; 4381da177e4SLinus Torvalds 439a455589fSAl Viro _enter("{%lu},%p{%pd},", dir->i_ino, dentry, dentry); 4401da177e4SLinus Torvalds 4411da177e4SLinus Torvalds /* search the directory */ 4421bbae9f8SAl Viro ret = afs_dir_iterate(dir, &cookie.ctx, key); 4431da177e4SLinus Torvalds if (ret < 0) { 44408e0e7c8SDavid Howells _leave(" = %d [iter]", ret); 44508e0e7c8SDavid Howells return ret; 4461da177e4SLinus Torvalds } 4471da177e4SLinus Torvalds 4481da177e4SLinus Torvalds ret = -ENOENT; 4491da177e4SLinus Torvalds if (!cookie.found) { 45008e0e7c8SDavid Howells _leave(" = -ENOENT [not found]"); 45108e0e7c8SDavid Howells return -ENOENT; 45208e0e7c8SDavid Howells } 45308e0e7c8SDavid Howells 45408e0e7c8SDavid Howells *fid = cookie.fid; 45508e0e7c8SDavid Howells _leave(" = 0 { vn=%u u=%u }", fid->vnode, fid->unique); 45608e0e7c8SDavid Howells return 0; 45708e0e7c8SDavid Howells } 45808e0e7c8SDavid Howells 45908e0e7c8SDavid Howells /* 460bec5eb61Swanglei * Try to auto mount the mountpoint with pseudo directory, if the autocell 461bec5eb61Swanglei * operation is setted. 462bec5eb61Swanglei */ 463bec5eb61Swanglei static struct inode *afs_try_auto_mntpt( 464bec5eb61Swanglei int ret, struct dentry *dentry, struct inode *dir, struct key *key, 465bec5eb61Swanglei struct afs_fid *fid) 466bec5eb61Swanglei { 467bec5eb61Swanglei const char *devname = dentry->d_name.name; 468bec5eb61Swanglei struct afs_vnode *vnode = AFS_FS_I(dir); 469bec5eb61Swanglei struct inode *inode; 470bec5eb61Swanglei 471a455589fSAl Viro _enter("%d, %p{%pd}, {%x:%u}, %p", 472a455589fSAl Viro ret, dentry, dentry, vnode->fid.vid, vnode->fid.vnode, key); 473bec5eb61Swanglei 474bec5eb61Swanglei if (ret != -ENOENT || 475bec5eb61Swanglei !test_bit(AFS_VNODE_AUTOCELL, &vnode->flags)) 476bec5eb61Swanglei goto out; 477bec5eb61Swanglei 478bec5eb61Swanglei inode = afs_iget_autocell(dir, devname, strlen(devname), key); 479bec5eb61Swanglei if (IS_ERR(inode)) { 480bec5eb61Swanglei ret = PTR_ERR(inode); 481bec5eb61Swanglei goto out; 482bec5eb61Swanglei } 483bec5eb61Swanglei 484bec5eb61Swanglei *fid = AFS_FS_I(inode)->fid; 485bec5eb61Swanglei _leave("= %p", inode); 486bec5eb61Swanglei return inode; 487bec5eb61Swanglei 488bec5eb61Swanglei out: 489bec5eb61Swanglei _leave("= %d", ret); 490bec5eb61Swanglei return ERR_PTR(ret); 491bec5eb61Swanglei } 492bec5eb61Swanglei 493bec5eb61Swanglei /* 49408e0e7c8SDavid Howells * look up an entry in a directory 49508e0e7c8SDavid Howells */ 496260a9803SDavid Howells static struct dentry *afs_lookup(struct inode *dir, struct dentry *dentry, 49700cd8dd3SAl Viro unsigned int flags) 49808e0e7c8SDavid Howells { 49908e0e7c8SDavid Howells struct afs_vnode *vnode; 50008e0e7c8SDavid Howells struct afs_fid fid; 50108e0e7c8SDavid Howells struct inode *inode; 50200d3b7a4SDavid Howells struct key *key; 50308e0e7c8SDavid Howells int ret; 50408e0e7c8SDavid Howells 505260a9803SDavid Howells vnode = AFS_FS_I(dir); 506260a9803SDavid Howells 507a455589fSAl Viro _enter("{%x:%u},%p{%pd},", 508a455589fSAl Viro vnode->fid.vid, vnode->fid.vnode, dentry, dentry); 509260a9803SDavid Howells 5102b0143b5SDavid Howells ASSERTCMP(d_inode(dentry), ==, NULL); 51108e0e7c8SDavid Howells 51245222b9eSDavid Howells if (dentry->d_name.len >= AFSNAMEMAX) { 51308e0e7c8SDavid Howells _leave(" = -ENAMETOOLONG"); 51408e0e7c8SDavid Howells return ERR_PTR(-ENAMETOOLONG); 51508e0e7c8SDavid Howells } 51608e0e7c8SDavid Howells 51708e0e7c8SDavid Howells if (test_bit(AFS_VNODE_DELETED, &vnode->flags)) { 51808e0e7c8SDavid Howells _leave(" = -ESTALE"); 51908e0e7c8SDavid Howells return ERR_PTR(-ESTALE); 52008e0e7c8SDavid Howells } 52108e0e7c8SDavid Howells 52200d3b7a4SDavid Howells key = afs_request_key(vnode->volume->cell); 52300d3b7a4SDavid Howells if (IS_ERR(key)) { 52400d3b7a4SDavid Howells _leave(" = %ld [key]", PTR_ERR(key)); 525e231c2eeSDavid Howells return ERR_CAST(key); 52600d3b7a4SDavid Howells } 52700d3b7a4SDavid Howells 528260a9803SDavid Howells ret = afs_validate(vnode, key); 52908e0e7c8SDavid Howells if (ret < 0) { 53000d3b7a4SDavid Howells key_put(key); 531260a9803SDavid Howells _leave(" = %d [val]", ret); 5321da177e4SLinus Torvalds return ERR_PTR(ret); 5331da177e4SLinus Torvalds } 5341da177e4SLinus Torvalds 535260a9803SDavid Howells ret = afs_do_lookup(dir, dentry, &fid, key); 536260a9803SDavid Howells if (ret < 0) { 537bec5eb61Swanglei inode = afs_try_auto_mntpt(ret, dentry, dir, key, &fid); 538bec5eb61Swanglei if (!IS_ERR(inode)) { 539bec5eb61Swanglei key_put(key); 540bec5eb61Swanglei goto success; 541bec5eb61Swanglei } 542bec5eb61Swanglei 543bec5eb61Swanglei ret = PTR_ERR(inode); 544260a9803SDavid Howells key_put(key); 545260a9803SDavid Howells if (ret == -ENOENT) { 546260a9803SDavid Howells d_add(dentry, NULL); 547260a9803SDavid Howells _leave(" = NULL [negative]"); 548260a9803SDavid Howells return NULL; 549260a9803SDavid Howells } 550260a9803SDavid Howells _leave(" = %d [do]", ret); 551260a9803SDavid Howells return ERR_PTR(ret); 552260a9803SDavid Howells } 553260a9803SDavid Howells dentry->d_fsdata = (void *)(unsigned long) vnode->status.data_version; 554260a9803SDavid Howells 5551da177e4SLinus Torvalds /* instantiate the dentry */ 556d2ddc776SDavid Howells inode = afs_iget(dir->i_sb, key, &fid, NULL, NULL, NULL); 55700d3b7a4SDavid Howells key_put(key); 55808e0e7c8SDavid Howells if (IS_ERR(inode)) { 55908e0e7c8SDavid Howells _leave(" = %ld", PTR_ERR(inode)); 560e231c2eeSDavid Howells return ERR_CAST(inode); 5611da177e4SLinus Torvalds } 5621da177e4SLinus Torvalds 563bec5eb61Swanglei success: 5641da177e4SLinus Torvalds d_add(dentry, inode); 565d6e43f75SDavid Howells _leave(" = 0 { vn=%u u=%u } -> { ino=%lu v=%u }", 56608e0e7c8SDavid Howells fid.vnode, 56708e0e7c8SDavid Howells fid.unique, 5682b0143b5SDavid Howells d_inode(dentry)->i_ino, 5692b0143b5SDavid Howells d_inode(dentry)->i_generation); 5701da177e4SLinus Torvalds 5711da177e4SLinus Torvalds return NULL; 572ec26815aSDavid Howells } 5731da177e4SLinus Torvalds 5741da177e4SLinus Torvalds /* 5751da177e4SLinus Torvalds * check that a dentry lookup hit has found a valid entry 5761da177e4SLinus Torvalds * - NOTE! the hit can be a negative hit too, so we can't assume we have an 5771da177e4SLinus Torvalds * inode 5781da177e4SLinus Torvalds */ 5790b728e19SAl Viro static int afs_d_revalidate(struct dentry *dentry, unsigned int flags) 5801da177e4SLinus Torvalds { 581260a9803SDavid Howells struct afs_vnode *vnode, *dir; 582dd0d9a46SArtem Bityutskiy struct afs_fid uninitialized_var(fid); 5831da177e4SLinus Torvalds struct dentry *parent; 584c435ee34SDavid Howells struct inode *inode; 58500d3b7a4SDavid Howells struct key *key; 586260a9803SDavid Howells void *dir_version; 5871da177e4SLinus Torvalds int ret; 5881da177e4SLinus Torvalds 5890b728e19SAl Viro if (flags & LOOKUP_RCU) 59034286d66SNick Piggin return -ECHILD; 59134286d66SNick Piggin 592c435ee34SDavid Howells if (d_really_is_positive(dentry)) { 5932b0143b5SDavid Howells vnode = AFS_FS_I(d_inode(dentry)); 594a455589fSAl Viro _enter("{v={%x:%u} n=%pd fl=%lx},", 595a455589fSAl Viro vnode->fid.vid, vnode->fid.vnode, dentry, 596260a9803SDavid Howells vnode->flags); 597c435ee34SDavid Howells } else { 598a455589fSAl Viro _enter("{neg n=%pd}", dentry); 599c435ee34SDavid Howells } 6001da177e4SLinus Torvalds 601260a9803SDavid Howells key = afs_request_key(AFS_FS_S(dentry->d_sb)->volume->cell); 60200d3b7a4SDavid Howells if (IS_ERR(key)) 60300d3b7a4SDavid Howells key = NULL; 60400d3b7a4SDavid Howells 605c435ee34SDavid Howells if (d_really_is_positive(dentry)) { 606c435ee34SDavid Howells inode = d_inode(dentry); 607c435ee34SDavid Howells if (inode) { 608c435ee34SDavid Howells vnode = AFS_FS_I(inode); 609c435ee34SDavid Howells afs_validate(vnode, key); 610c435ee34SDavid Howells if (test_bit(AFS_VNODE_DELETED, &vnode->flags)) 611c435ee34SDavid Howells goto out_bad; 612c435ee34SDavid Howells } 613c435ee34SDavid Howells } 614c435ee34SDavid Howells 6151da177e4SLinus Torvalds /* lock down the parent dentry so we can peer at it */ 61608e0e7c8SDavid Howells parent = dget_parent(dentry); 6172b0143b5SDavid Howells dir = AFS_FS_I(d_inode(parent)); 6181da177e4SLinus Torvalds 619260a9803SDavid Howells /* validate the parent directory */ 620260a9803SDavid Howells afs_validate(dir, key); 621260a9803SDavid Howells 622260a9803SDavid Howells if (test_bit(AFS_VNODE_DELETED, &dir->flags)) { 623a455589fSAl Viro _debug("%pd: parent dir deleted", dentry); 624c435ee34SDavid Howells goto out_bad_parent; 6251da177e4SLinus Torvalds } 6261da177e4SLinus Torvalds 627260a9803SDavid Howells dir_version = (void *) (unsigned long) dir->status.data_version; 628260a9803SDavid Howells if (dentry->d_fsdata == dir_version) 629260a9803SDavid Howells goto out_valid; /* the dir contents are unchanged */ 630260a9803SDavid Howells 63108e0e7c8SDavid Howells _debug("dir modified"); 6321da177e4SLinus Torvalds 6331da177e4SLinus Torvalds /* search the directory for this vnode */ 634260a9803SDavid Howells ret = afs_do_lookup(&dir->vfs_inode, dentry, &fid, key); 635260a9803SDavid Howells switch (ret) { 636260a9803SDavid Howells case 0: 637260a9803SDavid Howells /* the filename maps to something */ 6382b0143b5SDavid Howells if (d_really_is_negative(dentry)) 639c435ee34SDavid Howells goto out_bad_parent; 640c435ee34SDavid Howells inode = d_inode(dentry); 641c435ee34SDavid Howells if (is_bad_inode(inode)) { 642a455589fSAl Viro printk("kAFS: afs_d_revalidate: %pd2 has bad inode\n", 643a455589fSAl Viro dentry); 644c435ee34SDavid Howells goto out_bad_parent; 6451da177e4SLinus Torvalds } 6461da177e4SLinus Torvalds 647c435ee34SDavid Howells vnode = AFS_FS_I(inode); 648c435ee34SDavid Howells 6491da177e4SLinus Torvalds /* if the vnode ID has changed, then the dirent points to a 6501da177e4SLinus Torvalds * different file */ 65108e0e7c8SDavid Howells if (fid.vnode != vnode->fid.vnode) { 652a455589fSAl Viro _debug("%pd: dirent changed [%u != %u]", 653a455589fSAl Viro dentry, fid.vnode, 65408e0e7c8SDavid Howells vnode->fid.vnode); 6551da177e4SLinus Torvalds goto not_found; 6561da177e4SLinus Torvalds } 6571da177e4SLinus Torvalds 6581da177e4SLinus Torvalds /* if the vnode ID uniqifier has changed, then the file has 659260a9803SDavid Howells * been deleted and replaced, and the original vnode ID has 660260a9803SDavid Howells * been reused */ 66108e0e7c8SDavid Howells if (fid.unique != vnode->fid.unique) { 662a455589fSAl Viro _debug("%pd: file deleted (uq %u -> %u I:%u)", 663a455589fSAl Viro dentry, fid.unique, 6647a224228SJean Noel Cordenner vnode->fid.unique, 665c435ee34SDavid Howells vnode->vfs_inode.i_generation); 666c435ee34SDavid Howells write_seqlock(&vnode->cb_lock); 66708e0e7c8SDavid Howells set_bit(AFS_VNODE_DELETED, &vnode->flags); 668c435ee34SDavid Howells write_sequnlock(&vnode->cb_lock); 669260a9803SDavid Howells goto not_found; 670260a9803SDavid Howells } 671260a9803SDavid Howells goto out_valid; 672260a9803SDavid Howells 673260a9803SDavid Howells case -ENOENT: 674260a9803SDavid Howells /* the filename is unknown */ 675a455589fSAl Viro _debug("%pd: dirent not found", dentry); 6762b0143b5SDavid Howells if (d_really_is_positive(dentry)) 677260a9803SDavid Howells goto not_found; 678260a9803SDavid Howells goto out_valid; 679260a9803SDavid Howells 680260a9803SDavid Howells default: 681a455589fSAl Viro _debug("failed to iterate dir %pd: %d", 682a455589fSAl Viro parent, ret); 683c435ee34SDavid Howells goto out_bad_parent; 6841da177e4SLinus Torvalds } 68508e0e7c8SDavid Howells 6861da177e4SLinus Torvalds out_valid: 687260a9803SDavid Howells dentry->d_fsdata = dir_version; 6881da177e4SLinus Torvalds dput(parent); 68900d3b7a4SDavid Howells key_put(key); 6901da177e4SLinus Torvalds _leave(" = 1 [valid]"); 6911da177e4SLinus Torvalds return 1; 6921da177e4SLinus Torvalds 6931da177e4SLinus Torvalds /* the dirent, if it exists, now points to a different vnode */ 6941da177e4SLinus Torvalds not_found: 6951da177e4SLinus Torvalds spin_lock(&dentry->d_lock); 6961da177e4SLinus Torvalds dentry->d_flags |= DCACHE_NFSFS_RENAMED; 6971da177e4SLinus Torvalds spin_unlock(&dentry->d_lock); 6981da177e4SLinus Torvalds 699c435ee34SDavid Howells out_bad_parent: 700a455589fSAl Viro _debug("dropping dentry %pd2", dentry); 7011da177e4SLinus Torvalds dput(parent); 702c435ee34SDavid Howells out_bad: 70300d3b7a4SDavid Howells key_put(key); 7041da177e4SLinus Torvalds 7051da177e4SLinus Torvalds _leave(" = 0 [bad]"); 7061da177e4SLinus Torvalds return 0; 707ec26815aSDavid Howells } 7081da177e4SLinus Torvalds 7091da177e4SLinus Torvalds /* 7101da177e4SLinus Torvalds * allow the VFS to enquire as to whether a dentry should be unhashed (mustn't 7111da177e4SLinus Torvalds * sleep) 7121da177e4SLinus Torvalds * - called from dput() when d_count is going to 0. 7131da177e4SLinus Torvalds * - return 1 to request dentry be unhashed, 0 otherwise 7141da177e4SLinus Torvalds */ 715fe15ce44SNick Piggin static int afs_d_delete(const struct dentry *dentry) 7161da177e4SLinus Torvalds { 717a455589fSAl Viro _enter("%pd", dentry); 7181da177e4SLinus Torvalds 7191da177e4SLinus Torvalds if (dentry->d_flags & DCACHE_NFSFS_RENAMED) 7201da177e4SLinus Torvalds goto zap; 7211da177e4SLinus Torvalds 7222b0143b5SDavid Howells if (d_really_is_positive(dentry) && 7232b0143b5SDavid Howells (test_bit(AFS_VNODE_DELETED, &AFS_FS_I(d_inode(dentry))->flags) || 7242b0143b5SDavid Howells test_bit(AFS_VNODE_PSEUDODIR, &AFS_FS_I(d_inode(dentry))->flags))) 7251da177e4SLinus Torvalds goto zap; 7261da177e4SLinus Torvalds 7271da177e4SLinus Torvalds _leave(" = 0 [keep]"); 7281da177e4SLinus Torvalds return 0; 7291da177e4SLinus Torvalds 7301da177e4SLinus Torvalds zap: 7311da177e4SLinus Torvalds _leave(" = 1 [zap]"); 7321da177e4SLinus Torvalds return 1; 733ec26815aSDavid Howells } 734260a9803SDavid Howells 735260a9803SDavid Howells /* 736260a9803SDavid Howells * handle dentry release 737260a9803SDavid Howells */ 738260a9803SDavid Howells static void afs_d_release(struct dentry *dentry) 739260a9803SDavid Howells { 740a455589fSAl Viro _enter("%pd", dentry); 741260a9803SDavid Howells } 742260a9803SDavid Howells 743260a9803SDavid Howells /* 744d2ddc776SDavid Howells * Create a new inode for create/mkdir/symlink 745d2ddc776SDavid Howells */ 746d2ddc776SDavid Howells static void afs_vnode_new_inode(struct afs_fs_cursor *fc, 747d2ddc776SDavid Howells struct dentry *new_dentry, 748d2ddc776SDavid Howells struct afs_fid *newfid, 749d2ddc776SDavid Howells struct afs_file_status *newstatus, 750d2ddc776SDavid Howells struct afs_callback *newcb) 751d2ddc776SDavid Howells { 752d2ddc776SDavid Howells struct inode *inode; 753d2ddc776SDavid Howells 754d2ddc776SDavid Howells if (fc->ac.error < 0) 755d2ddc776SDavid Howells return; 756d2ddc776SDavid Howells 757d2ddc776SDavid Howells inode = afs_iget(fc->vnode->vfs_inode.i_sb, fc->key, 758d2ddc776SDavid Howells newfid, newstatus, newcb, fc->cbi); 759d2ddc776SDavid Howells if (IS_ERR(inode)) { 760d2ddc776SDavid Howells /* ENOMEM or EINTR at a really inconvenient time - just abandon 761d2ddc776SDavid Howells * the new directory on the server. 762d2ddc776SDavid Howells */ 763d2ddc776SDavid Howells fc->ac.error = PTR_ERR(inode); 764d2ddc776SDavid Howells return; 765d2ddc776SDavid Howells } 766d2ddc776SDavid Howells 767d2ddc776SDavid Howells d_instantiate(new_dentry, inode); 768d2ddc776SDavid Howells if (d_unhashed(new_dentry)) 769d2ddc776SDavid Howells d_rehash(new_dentry); 770d2ddc776SDavid Howells } 771d2ddc776SDavid Howells 772d2ddc776SDavid Howells /* 773260a9803SDavid Howells * create a directory on an AFS filesystem 774260a9803SDavid Howells */ 77518bb1db3SAl Viro static int afs_mkdir(struct inode *dir, struct dentry *dentry, umode_t mode) 776260a9803SDavid Howells { 777d2ddc776SDavid Howells struct afs_file_status newstatus; 778d2ddc776SDavid Howells struct afs_fs_cursor fc; 779d2ddc776SDavid Howells struct afs_callback newcb; 780d2ddc776SDavid Howells struct afs_vnode *dvnode = AFS_FS_I(dir); 781d2ddc776SDavid Howells struct afs_fid newfid; 782260a9803SDavid Howells struct key *key; 783260a9803SDavid Howells int ret; 784260a9803SDavid Howells 785d2ddc776SDavid Howells mode |= S_IFDIR; 786260a9803SDavid Howells 787a455589fSAl Viro _enter("{%x:%u},{%pd},%ho", 788a455589fSAl Viro dvnode->fid.vid, dvnode->fid.vnode, dentry, mode); 789260a9803SDavid Howells 790260a9803SDavid Howells key = afs_request_key(dvnode->volume->cell); 791260a9803SDavid Howells if (IS_ERR(key)) { 792260a9803SDavid Howells ret = PTR_ERR(key); 793260a9803SDavid Howells goto error; 794260a9803SDavid Howells } 795260a9803SDavid Howells 796d2ddc776SDavid Howells ret = -ERESTARTSYS; 797d2ddc776SDavid Howells if (afs_begin_vnode_operation(&fc, dvnode, key)) { 798d2ddc776SDavid Howells while (afs_select_fileserver(&fc)) { 799d2ddc776SDavid Howells fc.cb_break = dvnode->cb_break + dvnode->cb_s_break; 800d2ddc776SDavid Howells afs_fs_create(&fc, dentry->d_name.name, mode, 801d2ddc776SDavid Howells &newfid, &newstatus, &newcb); 802d2ddc776SDavid Howells } 803d2ddc776SDavid Howells 804d2ddc776SDavid Howells afs_check_for_remote_deletion(&fc, fc.vnode); 805d2ddc776SDavid Howells afs_vnode_commit_status(&fc, dvnode, fc.cb_break); 806d2ddc776SDavid Howells afs_vnode_new_inode(&fc, dentry, &newfid, &newstatus, &newcb); 807d2ddc776SDavid Howells ret = afs_end_vnode_operation(&fc); 808260a9803SDavid Howells if (ret < 0) 809d2ddc776SDavid Howells goto error_key; 810260a9803SDavid Howells } 811260a9803SDavid Howells 812260a9803SDavid Howells key_put(key); 813260a9803SDavid Howells _leave(" = 0"); 814260a9803SDavid Howells return 0; 815260a9803SDavid Howells 816d2ddc776SDavid Howells error_key: 817260a9803SDavid Howells key_put(key); 818260a9803SDavid Howells error: 819260a9803SDavid Howells d_drop(dentry); 820260a9803SDavid Howells _leave(" = %d", ret); 821260a9803SDavid Howells return ret; 822260a9803SDavid Howells } 823260a9803SDavid Howells 824260a9803SDavid Howells /* 825d2ddc776SDavid Howells * Remove a subdir from a directory. 826260a9803SDavid Howells */ 827d2ddc776SDavid Howells static void afs_dir_remove_subdir(struct dentry *dentry) 828260a9803SDavid Howells { 8292b0143b5SDavid Howells if (d_really_is_positive(dentry)) { 830d2ddc776SDavid Howells struct afs_vnode *vnode = AFS_FS_I(d_inode(dentry)); 831d2ddc776SDavid Howells 832260a9803SDavid Howells clear_nlink(&vnode->vfs_inode); 833260a9803SDavid Howells set_bit(AFS_VNODE_DELETED, &vnode->flags); 834c435ee34SDavid Howells clear_bit(AFS_VNODE_CB_PROMISED, &vnode->flags); 835260a9803SDavid Howells } 836260a9803SDavid Howells } 837260a9803SDavid Howells 838260a9803SDavid Howells /* 839d2ddc776SDavid Howells * remove a directory from an AFS filesystem 840260a9803SDavid Howells */ 841d2ddc776SDavid Howells static int afs_rmdir(struct inode *dir, struct dentry *dentry) 842260a9803SDavid Howells { 843d2ddc776SDavid Howells struct afs_fs_cursor fc; 844d2ddc776SDavid Howells struct afs_vnode *dvnode = AFS_FS_I(dir); 845260a9803SDavid Howells struct key *key; 846260a9803SDavid Howells int ret; 847260a9803SDavid Howells 848a455589fSAl Viro _enter("{%x:%u},{%pd}", 849a455589fSAl Viro dvnode->fid.vid, dvnode->fid.vnode, dentry); 850260a9803SDavid Howells 851260a9803SDavid Howells key = afs_request_key(dvnode->volume->cell); 852260a9803SDavid Howells if (IS_ERR(key)) { 853260a9803SDavid Howells ret = PTR_ERR(key); 854260a9803SDavid Howells goto error; 855260a9803SDavid Howells } 856260a9803SDavid Howells 857d2ddc776SDavid Howells ret = -ERESTARTSYS; 858d2ddc776SDavid Howells if (afs_begin_vnode_operation(&fc, dvnode, key)) { 859d2ddc776SDavid Howells while (afs_select_fileserver(&fc)) { 860d2ddc776SDavid Howells fc.cb_break = dvnode->cb_break + dvnode->cb_s_break; 861d2ddc776SDavid Howells afs_fs_remove(&fc, dentry->d_name.name, true); 862260a9803SDavid Howells } 863260a9803SDavid Howells 864d2ddc776SDavid Howells afs_vnode_commit_status(&fc, dvnode, fc.cb_break); 865d2ddc776SDavid Howells ret = afs_end_vnode_operation(&fc); 866d2ddc776SDavid Howells if (ret == 0) 867d2ddc776SDavid Howells afs_dir_remove_subdir(dentry); 868260a9803SDavid Howells } 869260a9803SDavid Howells 870260a9803SDavid Howells key_put(key); 871d2ddc776SDavid Howells error: 872d2ddc776SDavid Howells return ret; 873d2ddc776SDavid Howells } 874260a9803SDavid Howells 875d2ddc776SDavid Howells /* 876d2ddc776SDavid Howells * Remove a link to a file or symlink from a directory. 877d2ddc776SDavid Howells * 878d2ddc776SDavid Howells * If the file was not deleted due to excess hard links, the fileserver will 879d2ddc776SDavid Howells * break the callback promise on the file - if it had one - before it returns 880d2ddc776SDavid Howells * to us, and if it was deleted, it won't 881d2ddc776SDavid Howells * 882d2ddc776SDavid Howells * However, if we didn't have a callback promise outstanding, or it was 883d2ddc776SDavid Howells * outstanding on a different server, then it won't break it either... 884d2ddc776SDavid Howells */ 885d2ddc776SDavid Howells static int afs_dir_remove_link(struct dentry *dentry, struct key *key) 886d2ddc776SDavid Howells { 887d2ddc776SDavid Howells int ret = 0; 888d2ddc776SDavid Howells 889d2ddc776SDavid Howells if (d_really_is_positive(dentry)) { 890d2ddc776SDavid Howells struct afs_vnode *vnode = AFS_FS_I(d_inode(dentry)); 891d2ddc776SDavid Howells 892d2ddc776SDavid Howells if (test_bit(AFS_VNODE_DELETED, &vnode->flags)) 893d2ddc776SDavid Howells kdebug("AFS_VNODE_DELETED"); 894d2ddc776SDavid Howells clear_bit(AFS_VNODE_CB_PROMISED, &vnode->flags); 895d2ddc776SDavid Howells 896d2ddc776SDavid Howells ret = afs_validate(vnode, key); 897d2ddc776SDavid Howells if (ret == -ESTALE) 898d2ddc776SDavid Howells ret = 0; 899d2ddc776SDavid Howells _debug("nlink %d [val %d]", vnode->vfs_inode.i_nlink, ret); 900d2ddc776SDavid Howells } 901d2ddc776SDavid Howells 902d2ddc776SDavid Howells return ret; 903d2ddc776SDavid Howells } 904d2ddc776SDavid Howells 905d2ddc776SDavid Howells /* 906d2ddc776SDavid Howells * Remove a file or symlink from an AFS filesystem. 907d2ddc776SDavid Howells */ 908d2ddc776SDavid Howells static int afs_unlink(struct inode *dir, struct dentry *dentry) 909d2ddc776SDavid Howells { 910d2ddc776SDavid Howells struct afs_fs_cursor fc; 911d2ddc776SDavid Howells struct afs_vnode *dvnode = AFS_FS_I(dir), *vnode; 912d2ddc776SDavid Howells struct key *key; 913d2ddc776SDavid Howells int ret; 914d2ddc776SDavid Howells 915d2ddc776SDavid Howells _enter("{%x:%u},{%pd}", 916d2ddc776SDavid Howells dvnode->fid.vid, dvnode->fid.vnode, dentry); 917d2ddc776SDavid Howells 918d2ddc776SDavid Howells if (dentry->d_name.len >= AFSNAMEMAX) 919d2ddc776SDavid Howells return -ENAMETOOLONG; 920d2ddc776SDavid Howells 921d2ddc776SDavid Howells key = afs_request_key(dvnode->volume->cell); 922d2ddc776SDavid Howells if (IS_ERR(key)) { 923d2ddc776SDavid Howells ret = PTR_ERR(key); 924d2ddc776SDavid Howells goto error; 925d2ddc776SDavid Howells } 926d2ddc776SDavid Howells 927d2ddc776SDavid Howells /* Try to make sure we have a callback promise on the victim. */ 928d2ddc776SDavid Howells if (d_really_is_positive(dentry)) { 929d2ddc776SDavid Howells vnode = AFS_FS_I(d_inode(dentry)); 930d2ddc776SDavid Howells ret = afs_validate(vnode, key); 931d2ddc776SDavid Howells if (ret < 0) 932d2ddc776SDavid Howells goto error_key; 933d2ddc776SDavid Howells } 934d2ddc776SDavid Howells 935d2ddc776SDavid Howells ret = -ERESTARTSYS; 936d2ddc776SDavid Howells if (afs_begin_vnode_operation(&fc, dvnode, key)) { 937d2ddc776SDavid Howells while (afs_select_fileserver(&fc)) { 938d2ddc776SDavid Howells fc.cb_break = dvnode->cb_break + dvnode->cb_s_break; 939d2ddc776SDavid Howells afs_fs_remove(&fc, dentry->d_name.name, false); 940d2ddc776SDavid Howells } 941d2ddc776SDavid Howells 942d2ddc776SDavid Howells afs_vnode_commit_status(&fc, dvnode, fc.cb_break); 943d2ddc776SDavid Howells ret = afs_end_vnode_operation(&fc); 944d2ddc776SDavid Howells if (ret == 0) 945d2ddc776SDavid Howells ret = afs_dir_remove_link(dentry, key); 946d2ddc776SDavid Howells } 947d2ddc776SDavid Howells 948d2ddc776SDavid Howells error_key: 949260a9803SDavid Howells key_put(key); 950260a9803SDavid Howells error: 951260a9803SDavid Howells _leave(" = %d", ret); 952260a9803SDavid Howells return ret; 953260a9803SDavid Howells } 954260a9803SDavid Howells 955260a9803SDavid Howells /* 956260a9803SDavid Howells * create a regular file on an AFS filesystem 957260a9803SDavid Howells */ 9584acdaf27SAl Viro static int afs_create(struct inode *dir, struct dentry *dentry, umode_t mode, 959ebfc3b49SAl Viro bool excl) 960260a9803SDavid Howells { 961d2ddc776SDavid Howells struct afs_fs_cursor fc; 962d2ddc776SDavid Howells struct afs_file_status newstatus; 963d2ddc776SDavid Howells struct afs_callback newcb; 964d2ddc776SDavid Howells struct afs_vnode *dvnode = dvnode = AFS_FS_I(dir); 965d2ddc776SDavid Howells struct afs_fid newfid; 966260a9803SDavid Howells struct key *key; 967260a9803SDavid Howells int ret; 968260a9803SDavid Howells 969d2ddc776SDavid Howells mode |= S_IFREG; 970260a9803SDavid Howells 971a455589fSAl Viro _enter("{%x:%u},{%pd},%ho,", 972a455589fSAl Viro dvnode->fid.vid, dvnode->fid.vnode, dentry, mode); 973260a9803SDavid Howells 974d2ddc776SDavid Howells ret = -ENAMETOOLONG; 975d2ddc776SDavid Howells if (dentry->d_name.len >= AFSNAMEMAX) 976d2ddc776SDavid Howells goto error; 977d2ddc776SDavid Howells 978260a9803SDavid Howells key = afs_request_key(dvnode->volume->cell); 979260a9803SDavid Howells if (IS_ERR(key)) { 980260a9803SDavid Howells ret = PTR_ERR(key); 981260a9803SDavid Howells goto error; 982260a9803SDavid Howells } 983260a9803SDavid Howells 984d2ddc776SDavid Howells ret = -ERESTARTSYS; 985d2ddc776SDavid Howells if (afs_begin_vnode_operation(&fc, dvnode, key)) { 986d2ddc776SDavid Howells while (afs_select_fileserver(&fc)) { 987d2ddc776SDavid Howells fc.cb_break = dvnode->cb_break + dvnode->cb_s_break; 988d2ddc776SDavid Howells afs_fs_create(&fc, dentry->d_name.name, mode, 989d2ddc776SDavid Howells &newfid, &newstatus, &newcb); 990d2ddc776SDavid Howells } 991d2ddc776SDavid Howells 992d2ddc776SDavid Howells afs_check_for_remote_deletion(&fc, fc.vnode); 993d2ddc776SDavid Howells afs_vnode_commit_status(&fc, dvnode, fc.cb_break); 994d2ddc776SDavid Howells afs_vnode_new_inode(&fc, dentry, &newfid, &newstatus, &newcb); 995d2ddc776SDavid Howells ret = afs_end_vnode_operation(&fc); 996260a9803SDavid Howells if (ret < 0) 997d2ddc776SDavid Howells goto error_key; 998260a9803SDavid Howells } 999260a9803SDavid Howells 1000260a9803SDavid Howells key_put(key); 1001260a9803SDavid Howells _leave(" = 0"); 1002260a9803SDavid Howells return 0; 1003260a9803SDavid Howells 1004d2ddc776SDavid Howells error_key: 1005260a9803SDavid Howells key_put(key); 1006260a9803SDavid Howells error: 1007260a9803SDavid Howells d_drop(dentry); 1008260a9803SDavid Howells _leave(" = %d", ret); 1009260a9803SDavid Howells return ret; 1010260a9803SDavid Howells } 1011260a9803SDavid Howells 1012260a9803SDavid Howells /* 1013260a9803SDavid Howells * create a hard link between files in an AFS filesystem 1014260a9803SDavid Howells */ 1015260a9803SDavid Howells static int afs_link(struct dentry *from, struct inode *dir, 1016260a9803SDavid Howells struct dentry *dentry) 1017260a9803SDavid Howells { 1018d2ddc776SDavid Howells struct afs_fs_cursor fc; 1019260a9803SDavid Howells struct afs_vnode *dvnode, *vnode; 1020260a9803SDavid Howells struct key *key; 1021260a9803SDavid Howells int ret; 1022260a9803SDavid Howells 10232b0143b5SDavid Howells vnode = AFS_FS_I(d_inode(from)); 1024260a9803SDavid Howells dvnode = AFS_FS_I(dir); 1025260a9803SDavid Howells 1026a455589fSAl Viro _enter("{%x:%u},{%x:%u},{%pd}", 1027260a9803SDavid Howells vnode->fid.vid, vnode->fid.vnode, 1028260a9803SDavid Howells dvnode->fid.vid, dvnode->fid.vnode, 1029a455589fSAl Viro dentry); 1030260a9803SDavid Howells 1031d2ddc776SDavid Howells ret = -ENAMETOOLONG; 1032d2ddc776SDavid Howells if (dentry->d_name.len >= AFSNAMEMAX) 1033d2ddc776SDavid Howells goto error; 1034d2ddc776SDavid Howells 1035260a9803SDavid Howells key = afs_request_key(dvnode->volume->cell); 1036260a9803SDavid Howells if (IS_ERR(key)) { 1037260a9803SDavid Howells ret = PTR_ERR(key); 1038260a9803SDavid Howells goto error; 1039260a9803SDavid Howells } 1040260a9803SDavid Howells 1041d2ddc776SDavid Howells ret = -ERESTARTSYS; 1042d2ddc776SDavid Howells if (afs_begin_vnode_operation(&fc, dvnode, key)) { 1043d2ddc776SDavid Howells if (mutex_lock_interruptible_nested(&vnode->io_lock, 1) < 0) { 1044d2ddc776SDavid Howells afs_end_vnode_operation(&fc); 1045d2ddc776SDavid Howells return -ERESTARTSYS; 1046d2ddc776SDavid Howells } 1047260a9803SDavid Howells 1048d2ddc776SDavid Howells while (afs_select_fileserver(&fc)) { 1049d2ddc776SDavid Howells fc.cb_break = dvnode->cb_break + dvnode->cb_s_break; 1050d2ddc776SDavid Howells fc.cb_break_2 = vnode->cb_break + vnode->cb_s_break; 1051d2ddc776SDavid Howells afs_fs_link(&fc, vnode, dentry->d_name.name); 1052d2ddc776SDavid Howells } 1053d2ddc776SDavid Howells 1054d2ddc776SDavid Howells afs_vnode_commit_status(&fc, dvnode, fc.cb_break); 1055d2ddc776SDavid Howells afs_vnode_commit_status(&fc, vnode, fc.cb_break_2); 10567de9c6eeSAl Viro ihold(&vnode->vfs_inode); 1057260a9803SDavid Howells d_instantiate(dentry, &vnode->vfs_inode); 1058d2ddc776SDavid Howells 1059d2ddc776SDavid Howells mutex_unlock(&vnode->io_lock); 1060d2ddc776SDavid Howells ret = afs_end_vnode_operation(&fc); 1061d2ddc776SDavid Howells if (ret < 0) 1062d2ddc776SDavid Howells goto error_key; 1063d2ddc776SDavid Howells } 1064d2ddc776SDavid Howells 1065260a9803SDavid Howells key_put(key); 1066260a9803SDavid Howells _leave(" = 0"); 1067260a9803SDavid Howells return 0; 1068260a9803SDavid Howells 1069d2ddc776SDavid Howells error_key: 1070260a9803SDavid Howells key_put(key); 1071260a9803SDavid Howells error: 1072260a9803SDavid Howells d_drop(dentry); 1073260a9803SDavid Howells _leave(" = %d", ret); 1074260a9803SDavid Howells return ret; 1075260a9803SDavid Howells } 1076260a9803SDavid Howells 1077260a9803SDavid Howells /* 1078260a9803SDavid Howells * create a symlink in an AFS filesystem 1079260a9803SDavid Howells */ 1080260a9803SDavid Howells static int afs_symlink(struct inode *dir, struct dentry *dentry, 1081260a9803SDavid Howells const char *content) 1082260a9803SDavid Howells { 1083d2ddc776SDavid Howells struct afs_fs_cursor fc; 1084d2ddc776SDavid Howells struct afs_file_status newstatus; 1085d2ddc776SDavid Howells struct afs_vnode *dvnode = AFS_FS_I(dir); 1086d2ddc776SDavid Howells struct afs_fid newfid; 1087260a9803SDavid Howells struct key *key; 1088260a9803SDavid Howells int ret; 1089260a9803SDavid Howells 1090a455589fSAl Viro _enter("{%x:%u},{%pd},%s", 1091a455589fSAl Viro dvnode->fid.vid, dvnode->fid.vnode, dentry, 1092260a9803SDavid Howells content); 1093260a9803SDavid Howells 1094d2ddc776SDavid Howells ret = -ENAMETOOLONG; 1095d2ddc776SDavid Howells if (dentry->d_name.len >= AFSNAMEMAX) 1096d2ddc776SDavid Howells goto error; 1097d2ddc776SDavid Howells 1098260a9803SDavid Howells ret = -EINVAL; 109945222b9eSDavid Howells if (strlen(content) >= AFSPATHMAX) 1100260a9803SDavid Howells goto error; 1101260a9803SDavid Howells 1102260a9803SDavid Howells key = afs_request_key(dvnode->volume->cell); 1103260a9803SDavid Howells if (IS_ERR(key)) { 1104260a9803SDavid Howells ret = PTR_ERR(key); 1105260a9803SDavid Howells goto error; 1106260a9803SDavid Howells } 1107260a9803SDavid Howells 1108d2ddc776SDavid Howells ret = -ERESTARTSYS; 1109d2ddc776SDavid Howells if (afs_begin_vnode_operation(&fc, dvnode, key)) { 1110d2ddc776SDavid Howells while (afs_select_fileserver(&fc)) { 1111d2ddc776SDavid Howells fc.cb_break = dvnode->cb_break + dvnode->cb_s_break; 1112d2ddc776SDavid Howells afs_fs_symlink(&fc, dentry->d_name.name, content, 1113d2ddc776SDavid Howells &newfid, &newstatus); 1114d2ddc776SDavid Howells } 1115d2ddc776SDavid Howells 1116d2ddc776SDavid Howells afs_check_for_remote_deletion(&fc, fc.vnode); 1117d2ddc776SDavid Howells afs_vnode_commit_status(&fc, dvnode, fc.cb_break); 1118d2ddc776SDavid Howells afs_vnode_new_inode(&fc, dentry, &newfid, &newstatus, NULL); 1119d2ddc776SDavid Howells ret = afs_end_vnode_operation(&fc); 1120260a9803SDavid Howells if (ret < 0) 1121d2ddc776SDavid Howells goto error_key; 1122260a9803SDavid Howells } 1123260a9803SDavid Howells 1124260a9803SDavid Howells key_put(key); 1125260a9803SDavid Howells _leave(" = 0"); 1126260a9803SDavid Howells return 0; 1127260a9803SDavid Howells 1128d2ddc776SDavid Howells error_key: 1129260a9803SDavid Howells key_put(key); 1130260a9803SDavid Howells error: 1131260a9803SDavid Howells d_drop(dentry); 1132260a9803SDavid Howells _leave(" = %d", ret); 1133260a9803SDavid Howells return ret; 1134260a9803SDavid Howells } 1135260a9803SDavid Howells 1136260a9803SDavid Howells /* 1137260a9803SDavid Howells * rename a file in an AFS filesystem and/or move it between directories 1138260a9803SDavid Howells */ 1139260a9803SDavid Howells static int afs_rename(struct inode *old_dir, struct dentry *old_dentry, 11401cd66c93SMiklos Szeredi struct inode *new_dir, struct dentry *new_dentry, 11411cd66c93SMiklos Szeredi unsigned int flags) 1142260a9803SDavid Howells { 1143d2ddc776SDavid Howells struct afs_fs_cursor fc; 1144260a9803SDavid Howells struct afs_vnode *orig_dvnode, *new_dvnode, *vnode; 1145260a9803SDavid Howells struct key *key; 1146260a9803SDavid Howells int ret; 1147260a9803SDavid Howells 11481cd66c93SMiklos Szeredi if (flags) 11491cd66c93SMiklos Szeredi return -EINVAL; 11501cd66c93SMiklos Szeredi 11512b0143b5SDavid Howells vnode = AFS_FS_I(d_inode(old_dentry)); 1152260a9803SDavid Howells orig_dvnode = AFS_FS_I(old_dir); 1153260a9803SDavid Howells new_dvnode = AFS_FS_I(new_dir); 1154260a9803SDavid Howells 1155a455589fSAl Viro _enter("{%x:%u},{%x:%u},{%x:%u},{%pd}", 1156260a9803SDavid Howells orig_dvnode->fid.vid, orig_dvnode->fid.vnode, 1157260a9803SDavid Howells vnode->fid.vid, vnode->fid.vnode, 1158260a9803SDavid Howells new_dvnode->fid.vid, new_dvnode->fid.vnode, 1159a455589fSAl Viro new_dentry); 1160260a9803SDavid Howells 1161260a9803SDavid Howells key = afs_request_key(orig_dvnode->volume->cell); 1162260a9803SDavid Howells if (IS_ERR(key)) { 1163260a9803SDavid Howells ret = PTR_ERR(key); 1164260a9803SDavid Howells goto error; 1165260a9803SDavid Howells } 1166260a9803SDavid Howells 1167d2ddc776SDavid Howells ret = -ERESTARTSYS; 1168d2ddc776SDavid Howells if (afs_begin_vnode_operation(&fc, orig_dvnode, key)) { 1169d2ddc776SDavid Howells if (orig_dvnode != new_dvnode) { 1170d2ddc776SDavid Howells if (mutex_lock_interruptible_nested(&new_dvnode->io_lock, 1) < 0) { 1171d2ddc776SDavid Howells afs_end_vnode_operation(&fc); 1172d2ddc776SDavid Howells return -ERESTARTSYS; 1173d2ddc776SDavid Howells } 1174d2ddc776SDavid Howells } 1175d2ddc776SDavid Howells while (afs_select_fileserver(&fc)) { 1176d2ddc776SDavid Howells fc.cb_break = orig_dvnode->cb_break + orig_dvnode->cb_s_break; 1177d2ddc776SDavid Howells fc.cb_break_2 = new_dvnode->cb_break + new_dvnode->cb_s_break; 1178d2ddc776SDavid Howells afs_fs_rename(&fc, old_dentry->d_name.name, 1179d2ddc776SDavid Howells new_dvnode, new_dentry->d_name.name); 1180d2ddc776SDavid Howells } 1181d2ddc776SDavid Howells 1182d2ddc776SDavid Howells afs_vnode_commit_status(&fc, orig_dvnode, fc.cb_break); 1183d2ddc776SDavid Howells afs_vnode_commit_status(&fc, new_dvnode, fc.cb_break_2); 1184d2ddc776SDavid Howells if (orig_dvnode != new_dvnode) 1185d2ddc776SDavid Howells mutex_unlock(&new_dvnode->io_lock); 1186d2ddc776SDavid Howells ret = afs_end_vnode_operation(&fc); 1187260a9803SDavid Howells if (ret < 0) 1188d2ddc776SDavid Howells goto error_key; 1189d2ddc776SDavid Howells } 1190d2ddc776SDavid Howells 1191260a9803SDavid Howells key_put(key); 1192260a9803SDavid Howells _leave(" = 0"); 1193260a9803SDavid Howells return 0; 1194260a9803SDavid Howells 1195d2ddc776SDavid Howells error_key: 1196260a9803SDavid Howells key_put(key); 1197260a9803SDavid Howells error: 1198260a9803SDavid Howells d_drop(new_dentry); 1199260a9803SDavid Howells _leave(" = %d", ret); 1200260a9803SDavid Howells return ret; 1201260a9803SDavid Howells } 1202