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> 204d673da1SDavid Howells #include <linux/dns_resolver.h> 211da177e4SLinus Torvalds #include "internal.h" 221da177e4SLinus Torvalds 23260a9803SDavid Howells static struct dentry *afs_lookup(struct inode *dir, struct dentry *dentry, 2400cd8dd3SAl Viro unsigned int flags); 254d673da1SDavid Howells static struct dentry *afs_dynroot_lookup(struct inode *dir, struct dentry *dentry, 264d673da1SDavid Howells unsigned int flags); 271da177e4SLinus Torvalds static int afs_dir_open(struct inode *inode, struct file *file); 281bbae9f8SAl Viro static int afs_readdir(struct file *file, struct dir_context *ctx); 290b728e19SAl Viro static int afs_d_revalidate(struct dentry *dentry, unsigned int flags); 30fe15ce44SNick Piggin static int afs_d_delete(const struct dentry *dentry); 31260a9803SDavid Howells static void afs_d_release(struct dentry *dentry); 325cf9dd55SDavid Howells static int afs_lookup_one_filldir(struct dir_context *ctx, const char *name, int nlen, 335cf9dd55SDavid Howells loff_t fpos, u64 ino, unsigned dtype); 34ac7576f4SMiklos Szeredi static int afs_lookup_filldir(struct dir_context *ctx, const char *name, int nlen, 35afefdbb2SDavid Howells loff_t fpos, u64 ino, unsigned dtype); 364acdaf27SAl Viro static int afs_create(struct inode *dir, struct dentry *dentry, umode_t mode, 37ebfc3b49SAl Viro bool excl); 3818bb1db3SAl Viro static int afs_mkdir(struct inode *dir, struct dentry *dentry, umode_t mode); 39260a9803SDavid Howells static int afs_rmdir(struct inode *dir, struct dentry *dentry); 40260a9803SDavid Howells static int afs_unlink(struct inode *dir, struct dentry *dentry); 41260a9803SDavid Howells static int afs_link(struct dentry *from, struct inode *dir, 42260a9803SDavid Howells struct dentry *dentry); 43260a9803SDavid Howells static int afs_symlink(struct inode *dir, struct dentry *dentry, 44260a9803SDavid Howells const char *content); 45260a9803SDavid Howells static int afs_rename(struct inode *old_dir, struct dentry *old_dentry, 461cd66c93SMiklos Szeredi struct inode *new_dir, struct dentry *new_dentry, 471cd66c93SMiklos Szeredi unsigned int flags); 481da177e4SLinus Torvalds 494b6f5d20SArjan van de Ven const struct file_operations afs_dir_file_operations = { 501da177e4SLinus Torvalds .open = afs_dir_open, 5100d3b7a4SDavid Howells .release = afs_release, 5229884effSAl Viro .iterate_shared = afs_readdir, 53e8d6c554SDavid Howells .lock = afs_lock, 543222a3e5SChristoph Hellwig .llseek = generic_file_llseek, 551da177e4SLinus Torvalds }; 561da177e4SLinus Torvalds 57754661f1SArjan van de Ven const struct inode_operations afs_dir_inode_operations = { 58260a9803SDavid Howells .create = afs_create, 59260a9803SDavid Howells .lookup = afs_lookup, 60260a9803SDavid Howells .link = afs_link, 61260a9803SDavid Howells .unlink = afs_unlink, 62260a9803SDavid Howells .symlink = afs_symlink, 63260a9803SDavid Howells .mkdir = afs_mkdir, 64260a9803SDavid Howells .rmdir = afs_rmdir, 652773bf00SMiklos Szeredi .rename = afs_rename, 6600d3b7a4SDavid Howells .permission = afs_permission, 67416351f2SDavid Howells .getattr = afs_getattr, 6831143d5dSDavid Howells .setattr = afs_setattr, 69d3e3b7eaSDavid Howells .listxattr = afs_listxattr, 701da177e4SLinus Torvalds }; 711da177e4SLinus Torvalds 724d673da1SDavid Howells const struct file_operations afs_dynroot_file_operations = { 734d673da1SDavid Howells .open = dcache_dir_open, 744d673da1SDavid Howells .release = dcache_dir_close, 754d673da1SDavid Howells .iterate_shared = dcache_readdir, 764d673da1SDavid Howells .llseek = dcache_dir_lseek, 774d673da1SDavid Howells }; 784d673da1SDavid Howells 794d673da1SDavid Howells const struct inode_operations afs_dynroot_inode_operations = { 804d673da1SDavid Howells .lookup = afs_dynroot_lookup, 814d673da1SDavid Howells }; 824d673da1SDavid Howells 83d61dcce2SAl Viro const struct dentry_operations afs_fs_dentry_operations = { 841da177e4SLinus Torvalds .d_revalidate = afs_d_revalidate, 851da177e4SLinus Torvalds .d_delete = afs_d_delete, 86260a9803SDavid Howells .d_release = afs_d_release, 87d18610b0SDavid Howells .d_automount = afs_d_automount, 881da177e4SLinus Torvalds }; 891da177e4SLinus Torvalds 901da177e4SLinus Torvalds #define AFS_DIR_HASHTBL_SIZE 128 911da177e4SLinus Torvalds #define AFS_DIR_DIRENT_SIZE 32 921da177e4SLinus Torvalds #define AFS_DIRENT_PER_BLOCK 64 931da177e4SLinus Torvalds 941da177e4SLinus Torvalds union afs_dirent { 951da177e4SLinus Torvalds struct { 961da177e4SLinus Torvalds uint8_t valid; 971da177e4SLinus Torvalds uint8_t unused[1]; 981da177e4SLinus Torvalds __be16 hash_next; 991da177e4SLinus Torvalds __be32 vnode; 1001da177e4SLinus Torvalds __be32 unique; 1011da177e4SLinus Torvalds uint8_t name[16]; 1021da177e4SLinus Torvalds uint8_t overflow[4]; /* if any char of the name (inc 1031da177e4SLinus Torvalds * NUL) reaches here, consume 1041da177e4SLinus Torvalds * the next dirent too */ 1051da177e4SLinus Torvalds } u; 1061da177e4SLinus Torvalds uint8_t extended_name[32]; 1071da177e4SLinus Torvalds }; 1081da177e4SLinus Torvalds 1091da177e4SLinus Torvalds /* AFS directory page header (one at the beginning of every 2048-byte chunk) */ 1101da177e4SLinus Torvalds struct afs_dir_pagehdr { 1111da177e4SLinus Torvalds __be16 npages; 1121da177e4SLinus Torvalds __be16 magic; 1131da177e4SLinus Torvalds #define AFS_DIR_MAGIC htons(1234) 1141da177e4SLinus Torvalds uint8_t nentries; 1151da177e4SLinus Torvalds uint8_t bitmap[8]; 1161da177e4SLinus Torvalds uint8_t pad[19]; 1171da177e4SLinus Torvalds }; 1181da177e4SLinus Torvalds 1191da177e4SLinus Torvalds /* directory block layout */ 1201da177e4SLinus Torvalds union afs_dir_block { 1211da177e4SLinus Torvalds 1221da177e4SLinus Torvalds struct afs_dir_pagehdr pagehdr; 1231da177e4SLinus Torvalds 1241da177e4SLinus Torvalds struct { 1251da177e4SLinus Torvalds struct afs_dir_pagehdr pagehdr; 1261da177e4SLinus Torvalds uint8_t alloc_ctrs[128]; 1271da177e4SLinus Torvalds /* dir hash table */ 1281da177e4SLinus Torvalds uint16_t hashtable[AFS_DIR_HASHTBL_SIZE]; 1291da177e4SLinus Torvalds } hdr; 1301da177e4SLinus Torvalds 1311da177e4SLinus Torvalds union afs_dirent dirents[AFS_DIRENT_PER_BLOCK]; 1321da177e4SLinus Torvalds }; 1331da177e4SLinus Torvalds 1341da177e4SLinus Torvalds /* layout on a linux VM page */ 1351da177e4SLinus Torvalds struct afs_dir_page { 1361da177e4SLinus Torvalds union afs_dir_block blocks[PAGE_SIZE / sizeof(union afs_dir_block)]; 1371da177e4SLinus Torvalds }; 1381da177e4SLinus Torvalds 1395cf9dd55SDavid Howells struct afs_lookup_one_cookie { 1405cf9dd55SDavid Howells struct dir_context ctx; 1415cf9dd55SDavid Howells struct qstr name; 1425cf9dd55SDavid Howells bool found; 1435cf9dd55SDavid Howells struct afs_fid fid; 1445cf9dd55SDavid Howells }; 1455cf9dd55SDavid Howells 146260a9803SDavid Howells struct afs_lookup_cookie { 1471bbae9f8SAl Viro struct dir_context ctx; 1481bbae9f8SAl Viro struct qstr name; 1495cf9dd55SDavid Howells bool found; 1505cf9dd55SDavid Howells bool one_only; 1515cf9dd55SDavid Howells unsigned short nr_fids; 1525cf9dd55SDavid Howells struct afs_file_status *statuses; 1535cf9dd55SDavid Howells struct afs_callback *callbacks; 1545cf9dd55SDavid Howells struct afs_fid fids[50]; 1551da177e4SLinus Torvalds }; 1561da177e4SLinus Torvalds 1571da177e4SLinus Torvalds /* 1581da177e4SLinus Torvalds * check that a directory page is valid 1591da177e4SLinus Torvalds */ 160dab17c1aSDavid Howells bool afs_dir_check_page(struct inode *dir, struct page *page) 1611da177e4SLinus Torvalds { 1621da177e4SLinus Torvalds struct afs_dir_page *dbuf; 163dab17c1aSDavid Howells struct afs_vnode *vnode = AFS_FS_I(dir); 164dab17c1aSDavid Howells loff_t latter, i_size, off; 1651da177e4SLinus Torvalds int tmp, qty; 1661da177e4SLinus Torvalds 1671da177e4SLinus Torvalds #if 0 1681da177e4SLinus Torvalds /* check the page count */ 1691da177e4SLinus Torvalds qty = desc.size / sizeof(dbuf->blocks[0]); 1701da177e4SLinus Torvalds if (qty == 0) 1711da177e4SLinus Torvalds goto error; 1721da177e4SLinus Torvalds 1731da177e4SLinus Torvalds if (page->index == 0 && qty != ntohs(dbuf->blocks[0].pagehdr.npages)) { 1741da177e4SLinus Torvalds printk("kAFS: %s(%lu): wrong number of dir blocks %d!=%hu\n", 175530b6412SHarvey Harrison __func__, dir->i_ino, qty, 17608e0e7c8SDavid Howells ntohs(dbuf->blocks[0].pagehdr.npages)); 1771da177e4SLinus Torvalds goto error; 1781da177e4SLinus Torvalds } 1791da177e4SLinus Torvalds #endif 1801da177e4SLinus Torvalds 181dab17c1aSDavid Howells /* Determine how many magic numbers there should be in this page, but 182dab17c1aSDavid Howells * we must take care because the directory may change size under us. 183dab17c1aSDavid Howells */ 184dab17c1aSDavid Howells off = page_offset(page); 185dab17c1aSDavid Howells i_size = i_size_read(dir); 186dab17c1aSDavid Howells if (i_size <= off) 187dab17c1aSDavid Howells goto checked; 188dab17c1aSDavid Howells 189dab17c1aSDavid Howells latter = i_size - off; 1901da177e4SLinus Torvalds if (latter >= PAGE_SIZE) 1911da177e4SLinus Torvalds qty = PAGE_SIZE; 1921da177e4SLinus Torvalds else 1931da177e4SLinus Torvalds qty = latter; 1941da177e4SLinus Torvalds qty /= sizeof(union afs_dir_block); 1951da177e4SLinus Torvalds 1961da177e4SLinus Torvalds /* check them */ 1971da177e4SLinus Torvalds dbuf = page_address(page); 1981da177e4SLinus Torvalds for (tmp = 0; tmp < qty; tmp++) { 1991da177e4SLinus Torvalds if (dbuf->blocks[tmp].pagehdr.magic != AFS_DIR_MAGIC) { 200dab17c1aSDavid Howells printk("kAFS: %s(%lx): bad magic %d/%d is %04hx\n", 201530b6412SHarvey Harrison __func__, dir->i_ino, tmp, qty, 2021da177e4SLinus Torvalds ntohs(dbuf->blocks[tmp].pagehdr.magic)); 203dab17c1aSDavid Howells trace_afs_dir_check_failed(vnode, off, i_size); 2041da177e4SLinus Torvalds goto error; 2051da177e4SLinus Torvalds } 2061da177e4SLinus Torvalds } 2071da177e4SLinus Torvalds 208dab17c1aSDavid Howells checked: 2091da177e4SLinus Torvalds SetPageChecked(page); 210be5b82dbSAl Viro return true; 2111da177e4SLinus Torvalds 2121da177e4SLinus Torvalds error: 2131da177e4SLinus Torvalds SetPageError(page); 214be5b82dbSAl Viro return false; 215ec26815aSDavid Howells } 2161da177e4SLinus Torvalds 2171da177e4SLinus Torvalds /* 2181da177e4SLinus Torvalds * discard a page cached in the pagecache 2191da177e4SLinus Torvalds */ 2201da177e4SLinus Torvalds static inline void afs_dir_put_page(struct page *page) 2211da177e4SLinus Torvalds { 2221da177e4SLinus Torvalds kunmap(page); 223dab17c1aSDavid Howells unlock_page(page); 22409cbfeafSKirill A. Shutemov put_page(page); 225ec26815aSDavid Howells } 2261da177e4SLinus Torvalds 2271da177e4SLinus Torvalds /* 2281da177e4SLinus Torvalds * get a page into the pagecache 2291da177e4SLinus Torvalds */ 23000d3b7a4SDavid Howells static struct page *afs_dir_get_page(struct inode *dir, unsigned long index, 23100d3b7a4SDavid Howells struct key *key) 2321da177e4SLinus Torvalds { 2331da177e4SLinus Torvalds struct page *page; 2341da177e4SLinus Torvalds _enter("{%lu},%lu", dir->i_ino, index); 2351da177e4SLinus Torvalds 236f6d335c0SAl Viro page = read_cache_page(dir->i_mapping, index, afs_page_filler, key); 2371da177e4SLinus Torvalds if (!IS_ERR(page)) { 238dab17c1aSDavid Howells lock_page(page); 2391da177e4SLinus Torvalds kmap(page); 240be5b82dbSAl Viro if (unlikely(!PageChecked(page))) { 241dab17c1aSDavid Howells if (PageError(page)) 2421da177e4SLinus Torvalds goto fail; 2431da177e4SLinus Torvalds } 244be5b82dbSAl Viro } 2451da177e4SLinus Torvalds return page; 2461da177e4SLinus Torvalds 2471da177e4SLinus Torvalds fail: 2481da177e4SLinus Torvalds afs_dir_put_page(page); 24908e0e7c8SDavid Howells _leave(" = -EIO"); 2501da177e4SLinus Torvalds return ERR_PTR(-EIO); 251ec26815aSDavid Howells } 2521da177e4SLinus Torvalds 2531da177e4SLinus Torvalds /* 2541da177e4SLinus Torvalds * open an AFS directory file 2551da177e4SLinus Torvalds */ 2561da177e4SLinus Torvalds static int afs_dir_open(struct inode *inode, struct file *file) 2571da177e4SLinus Torvalds { 2581da177e4SLinus Torvalds _enter("{%lu}", inode->i_ino); 2591da177e4SLinus Torvalds 2602ecd05aeSAlexey Dobriyan BUILD_BUG_ON(sizeof(union afs_dir_block) != 2048); 2612ecd05aeSAlexey Dobriyan BUILD_BUG_ON(sizeof(union afs_dirent) != 32); 2621da177e4SLinus Torvalds 26308e0e7c8SDavid Howells if (test_bit(AFS_VNODE_DELETED, &AFS_FS_I(inode)->flags)) 2641da177e4SLinus Torvalds return -ENOENT; 2651da177e4SLinus Torvalds 26600d3b7a4SDavid Howells return afs_open(inode, file); 267ec26815aSDavid Howells } 2681da177e4SLinus Torvalds 2691da177e4SLinus Torvalds /* 2701da177e4SLinus Torvalds * deal with one block in an AFS directory 2711da177e4SLinus Torvalds */ 2721bbae9f8SAl Viro static int afs_dir_iterate_block(struct dir_context *ctx, 2731da177e4SLinus Torvalds union afs_dir_block *block, 2741bbae9f8SAl Viro unsigned blkoff) 2751da177e4SLinus Torvalds { 2761da177e4SLinus Torvalds union afs_dirent *dire; 2771da177e4SLinus Torvalds unsigned offset, next, curr; 2781da177e4SLinus Torvalds size_t nlen; 2791bbae9f8SAl Viro int tmp; 2801da177e4SLinus Torvalds 2811bbae9f8SAl Viro _enter("%u,%x,%p,,",(unsigned)ctx->pos,blkoff,block); 2821da177e4SLinus Torvalds 2831bbae9f8SAl Viro curr = (ctx->pos - blkoff) / sizeof(union afs_dirent); 2841da177e4SLinus Torvalds 2851da177e4SLinus Torvalds /* walk through the block, an entry at a time */ 2861da177e4SLinus Torvalds for (offset = AFS_DIRENT_PER_BLOCK - block->pagehdr.nentries; 2871da177e4SLinus Torvalds offset < AFS_DIRENT_PER_BLOCK; 2881da177e4SLinus Torvalds offset = next 2891da177e4SLinus Torvalds ) { 2901da177e4SLinus Torvalds next = offset + 1; 2911da177e4SLinus Torvalds 2921da177e4SLinus Torvalds /* skip entries marked unused in the bitmap */ 2931da177e4SLinus Torvalds if (!(block->pagehdr.bitmap[offset / 8] & 2941da177e4SLinus Torvalds (1 << (offset % 8)))) { 2955b5e0928SAlexey Dobriyan _debug("ENT[%zu.%u]: unused", 2961da177e4SLinus Torvalds blkoff / sizeof(union afs_dir_block), offset); 2971da177e4SLinus Torvalds if (offset >= curr) 2981bbae9f8SAl Viro ctx->pos = blkoff + 2991da177e4SLinus Torvalds next * sizeof(union afs_dirent); 3001da177e4SLinus Torvalds continue; 3011da177e4SLinus Torvalds } 3021da177e4SLinus Torvalds 3031da177e4SLinus Torvalds /* got a valid entry */ 3041da177e4SLinus Torvalds dire = &block->dirents[offset]; 3051da177e4SLinus Torvalds nlen = strnlen(dire->u.name, 3061da177e4SLinus Torvalds sizeof(*block) - 3071da177e4SLinus Torvalds offset * sizeof(union afs_dirent)); 3081da177e4SLinus Torvalds 3095b5e0928SAlexey Dobriyan _debug("ENT[%zu.%u]: %s %zu \"%s\"", 3101da177e4SLinus Torvalds blkoff / sizeof(union afs_dir_block), offset, 3111da177e4SLinus Torvalds (offset < curr ? "skip" : "fill"), 3121da177e4SLinus Torvalds nlen, dire->u.name); 3131da177e4SLinus Torvalds 3141da177e4SLinus Torvalds /* work out where the next possible entry is */ 3151da177e4SLinus Torvalds for (tmp = nlen; tmp > 15; tmp -= sizeof(union afs_dirent)) { 3161da177e4SLinus Torvalds if (next >= AFS_DIRENT_PER_BLOCK) { 3175b5e0928SAlexey Dobriyan _debug("ENT[%zu.%u]:" 3181da177e4SLinus Torvalds " %u travelled beyond end dir block" 3195b5e0928SAlexey Dobriyan " (len %u/%zu)", 3201da177e4SLinus Torvalds blkoff / sizeof(union afs_dir_block), 3211da177e4SLinus Torvalds offset, next, tmp, nlen); 3221da177e4SLinus Torvalds return -EIO; 3231da177e4SLinus Torvalds } 3241da177e4SLinus Torvalds if (!(block->pagehdr.bitmap[next / 8] & 3251da177e4SLinus Torvalds (1 << (next % 8)))) { 3265b5e0928SAlexey Dobriyan _debug("ENT[%zu.%u]:" 3275b5e0928SAlexey Dobriyan " %u unmarked extension (len %u/%zu)", 3281da177e4SLinus Torvalds blkoff / sizeof(union afs_dir_block), 3291da177e4SLinus Torvalds offset, next, tmp, nlen); 3301da177e4SLinus Torvalds return -EIO; 3311da177e4SLinus Torvalds } 3321da177e4SLinus Torvalds 3335b5e0928SAlexey Dobriyan _debug("ENT[%zu.%u]: ext %u/%zu", 3341da177e4SLinus Torvalds blkoff / sizeof(union afs_dir_block), 3351da177e4SLinus Torvalds next, tmp, nlen); 3361da177e4SLinus Torvalds next++; 3371da177e4SLinus Torvalds } 3381da177e4SLinus Torvalds 3391da177e4SLinus Torvalds /* skip if starts before the current position */ 3401da177e4SLinus Torvalds if (offset < curr) 3411da177e4SLinus Torvalds continue; 3421da177e4SLinus Torvalds 3431da177e4SLinus Torvalds /* found the next entry */ 3441bbae9f8SAl Viro if (!dir_emit(ctx, dire->u.name, nlen, 3451da177e4SLinus Torvalds ntohl(dire->u.vnode), 3465cf9dd55SDavid Howells (ctx->actor == afs_lookup_filldir || 3475cf9dd55SDavid Howells ctx->actor == afs_lookup_one_filldir)? 3481bbae9f8SAl Viro ntohl(dire->u.unique) : DT_UNKNOWN)) { 3491da177e4SLinus Torvalds _leave(" = 0 [full]"); 3501da177e4SLinus Torvalds return 0; 3511da177e4SLinus Torvalds } 3521da177e4SLinus Torvalds 3531bbae9f8SAl Viro ctx->pos = blkoff + next * sizeof(union afs_dirent); 3541da177e4SLinus Torvalds } 3551da177e4SLinus Torvalds 3561da177e4SLinus Torvalds _leave(" = 1 [more]"); 3571da177e4SLinus Torvalds return 1; 358ec26815aSDavid Howells } 3591da177e4SLinus Torvalds 3601da177e4SLinus Torvalds /* 36108e0e7c8SDavid Howells * iterate through the data blob that lists the contents of an AFS directory 3621da177e4SLinus Torvalds */ 3631bbae9f8SAl Viro static int afs_dir_iterate(struct inode *dir, struct dir_context *ctx, 3641bbae9f8SAl Viro struct key *key) 3651da177e4SLinus Torvalds { 3661da177e4SLinus Torvalds union afs_dir_block *dblock; 3671da177e4SLinus Torvalds struct afs_dir_page *dbuf; 3681da177e4SLinus Torvalds struct page *page; 3691da177e4SLinus Torvalds unsigned blkoff, limit; 3701da177e4SLinus Torvalds int ret; 3711da177e4SLinus Torvalds 3721bbae9f8SAl Viro _enter("{%lu},%u,,", dir->i_ino, (unsigned)ctx->pos); 3731da177e4SLinus Torvalds 37408e0e7c8SDavid Howells if (test_bit(AFS_VNODE_DELETED, &AFS_FS_I(dir)->flags)) { 3751da177e4SLinus Torvalds _leave(" = -ESTALE"); 3761da177e4SLinus Torvalds return -ESTALE; 3771da177e4SLinus Torvalds } 3781da177e4SLinus Torvalds 3791da177e4SLinus Torvalds /* round the file position up to the next entry boundary */ 3801bbae9f8SAl Viro ctx->pos += sizeof(union afs_dirent) - 1; 3811bbae9f8SAl Viro ctx->pos &= ~(sizeof(union afs_dirent) - 1); 3821da177e4SLinus Torvalds 3831da177e4SLinus Torvalds /* walk through the blocks in sequence */ 3841da177e4SLinus Torvalds ret = 0; 3851bbae9f8SAl Viro while (ctx->pos < dir->i_size) { 3861bbae9f8SAl Viro blkoff = ctx->pos & ~(sizeof(union afs_dir_block) - 1); 3871da177e4SLinus Torvalds 3881da177e4SLinus Torvalds /* fetch the appropriate page from the directory */ 38900d3b7a4SDavid Howells page = afs_dir_get_page(dir, blkoff / PAGE_SIZE, key); 3901da177e4SLinus Torvalds if (IS_ERR(page)) { 3911da177e4SLinus Torvalds ret = PTR_ERR(page); 3921da177e4SLinus Torvalds break; 3931da177e4SLinus Torvalds } 3941da177e4SLinus Torvalds 3951da177e4SLinus Torvalds limit = blkoff & ~(PAGE_SIZE - 1); 3961da177e4SLinus Torvalds 3971da177e4SLinus Torvalds dbuf = page_address(page); 3981da177e4SLinus Torvalds 3991da177e4SLinus Torvalds /* deal with the individual blocks stashed on this page */ 4001da177e4SLinus Torvalds do { 4011da177e4SLinus Torvalds dblock = &dbuf->blocks[(blkoff % PAGE_SIZE) / 4021da177e4SLinus Torvalds sizeof(union afs_dir_block)]; 4031bbae9f8SAl Viro ret = afs_dir_iterate_block(ctx, dblock, blkoff); 4041da177e4SLinus Torvalds if (ret != 1) { 4051da177e4SLinus Torvalds afs_dir_put_page(page); 4061da177e4SLinus Torvalds goto out; 4071da177e4SLinus Torvalds } 4081da177e4SLinus Torvalds 4091da177e4SLinus Torvalds blkoff += sizeof(union afs_dir_block); 4101da177e4SLinus Torvalds 4111bbae9f8SAl Viro } while (ctx->pos < dir->i_size && blkoff < limit); 4121da177e4SLinus Torvalds 4131da177e4SLinus Torvalds afs_dir_put_page(page); 4141da177e4SLinus Torvalds ret = 0; 4151da177e4SLinus Torvalds } 4161da177e4SLinus Torvalds 4171da177e4SLinus Torvalds out: 4181da177e4SLinus Torvalds _leave(" = %d", ret); 4191da177e4SLinus Torvalds return ret; 420ec26815aSDavid Howells } 4211da177e4SLinus Torvalds 4221da177e4SLinus Torvalds /* 4231da177e4SLinus Torvalds * read an AFS directory 4241da177e4SLinus Torvalds */ 4251bbae9f8SAl Viro static int afs_readdir(struct file *file, struct dir_context *ctx) 4261da177e4SLinus Torvalds { 427215804a9SDavid Howells return afs_dir_iterate(file_inode(file), ctx, afs_file_key(file)); 428ec26815aSDavid Howells } 4291da177e4SLinus Torvalds 4301da177e4SLinus Torvalds /* 4315cf9dd55SDavid Howells * Search the directory for a single name 4321da177e4SLinus Torvalds * - if afs_dir_iterate_block() spots this function, it'll pass the FID 4331da177e4SLinus Torvalds * uniquifier through dtype 4341da177e4SLinus Torvalds */ 4355cf9dd55SDavid Howells static int afs_lookup_one_filldir(struct dir_context *ctx, const char *name, 436ac7576f4SMiklos Szeredi int nlen, loff_t fpos, u64 ino, unsigned dtype) 4371da177e4SLinus Torvalds { 4385cf9dd55SDavid Howells struct afs_lookup_one_cookie *cookie = 4395cf9dd55SDavid Howells container_of(ctx, struct afs_lookup_one_cookie, ctx); 4401da177e4SLinus Torvalds 4411bbae9f8SAl Viro _enter("{%s,%u},%s,%u,,%llu,%u", 4421bbae9f8SAl Viro cookie->name.name, cookie->name.len, name, nlen, 443ba3e0e1aSDavid S. Miller (unsigned long long) ino, dtype); 4441da177e4SLinus Torvalds 44508e0e7c8SDavid Howells /* insanity checks first */ 44608e0e7c8SDavid Howells BUILD_BUG_ON(sizeof(union afs_dir_block) != 2048); 44708e0e7c8SDavid Howells BUILD_BUG_ON(sizeof(union afs_dirent) != 32); 44808e0e7c8SDavid Howells 4491bbae9f8SAl Viro if (cookie->name.len != nlen || 4501bbae9f8SAl Viro memcmp(cookie->name.name, name, nlen) != 0) { 4511da177e4SLinus Torvalds _leave(" = 0 [no]"); 4521da177e4SLinus Torvalds return 0; 4531da177e4SLinus Torvalds } 4541da177e4SLinus Torvalds 4551da177e4SLinus Torvalds cookie->fid.vnode = ino; 4561da177e4SLinus Torvalds cookie->fid.unique = dtype; 4571da177e4SLinus Torvalds cookie->found = 1; 4581da177e4SLinus Torvalds 4591da177e4SLinus Torvalds _leave(" = -1 [found]"); 4601da177e4SLinus Torvalds return -1; 461ec26815aSDavid Howells } 4621da177e4SLinus Torvalds 4631da177e4SLinus Torvalds /* 4645cf9dd55SDavid Howells * Do a lookup of a single name in a directory 465260a9803SDavid Howells * - just returns the FID the dentry name maps to if found 4661da177e4SLinus Torvalds */ 4675cf9dd55SDavid Howells static int afs_do_lookup_one(struct inode *dir, struct dentry *dentry, 46800d3b7a4SDavid Howells struct afs_fid *fid, struct key *key) 4691da177e4SLinus Torvalds { 4701bbae9f8SAl Viro struct afs_super_info *as = dir->i_sb->s_fs_info; 4715cf9dd55SDavid Howells struct afs_lookup_one_cookie cookie = { 4725cf9dd55SDavid Howells .ctx.actor = afs_lookup_one_filldir, 4731bbae9f8SAl Viro .name = dentry->d_name, 4741bbae9f8SAl Viro .fid.vid = as->volume->vid 4751bbae9f8SAl Viro }; 4761da177e4SLinus Torvalds int ret; 4771da177e4SLinus Torvalds 478a455589fSAl Viro _enter("{%lu},%p{%pd},", dir->i_ino, dentry, dentry); 4791da177e4SLinus Torvalds 4801da177e4SLinus Torvalds /* search the directory */ 4811bbae9f8SAl Viro ret = afs_dir_iterate(dir, &cookie.ctx, key); 4821da177e4SLinus Torvalds if (ret < 0) { 48308e0e7c8SDavid Howells _leave(" = %d [iter]", ret); 48408e0e7c8SDavid Howells return ret; 4851da177e4SLinus Torvalds } 4861da177e4SLinus Torvalds 4871da177e4SLinus Torvalds ret = -ENOENT; 4881da177e4SLinus Torvalds if (!cookie.found) { 48908e0e7c8SDavid Howells _leave(" = -ENOENT [not found]"); 49008e0e7c8SDavid Howells return -ENOENT; 49108e0e7c8SDavid Howells } 49208e0e7c8SDavid Howells 49308e0e7c8SDavid Howells *fid = cookie.fid; 49408e0e7c8SDavid Howells _leave(" = 0 { vn=%u u=%u }", fid->vnode, fid->unique); 49508e0e7c8SDavid Howells return 0; 49608e0e7c8SDavid Howells } 49708e0e7c8SDavid Howells 49808e0e7c8SDavid Howells /* 4995cf9dd55SDavid Howells * search the directory for a name 5005cf9dd55SDavid Howells * - if afs_dir_iterate_block() spots this function, it'll pass the FID 5015cf9dd55SDavid Howells * uniquifier through dtype 5025cf9dd55SDavid Howells */ 5035cf9dd55SDavid Howells static int afs_lookup_filldir(struct dir_context *ctx, const char *name, 5045cf9dd55SDavid Howells int nlen, loff_t fpos, u64 ino, unsigned dtype) 5055cf9dd55SDavid Howells { 5065cf9dd55SDavid Howells struct afs_lookup_cookie *cookie = 5075cf9dd55SDavid Howells container_of(ctx, struct afs_lookup_cookie, ctx); 5085cf9dd55SDavid Howells int ret; 5095cf9dd55SDavid Howells 5105cf9dd55SDavid Howells _enter("{%s,%u},%s,%u,,%llu,%u", 5115cf9dd55SDavid Howells cookie->name.name, cookie->name.len, name, nlen, 5125cf9dd55SDavid Howells (unsigned long long) ino, dtype); 5135cf9dd55SDavid Howells 5145cf9dd55SDavid Howells /* insanity checks first */ 5155cf9dd55SDavid Howells BUILD_BUG_ON(sizeof(union afs_dir_block) != 2048); 5165cf9dd55SDavid Howells BUILD_BUG_ON(sizeof(union afs_dirent) != 32); 5175cf9dd55SDavid Howells 5185cf9dd55SDavid Howells if (cookie->found) { 5195cf9dd55SDavid Howells if (cookie->nr_fids < 50) { 5205cf9dd55SDavid Howells cookie->fids[cookie->nr_fids].vnode = ino; 5215cf9dd55SDavid Howells cookie->fids[cookie->nr_fids].unique = dtype; 5225cf9dd55SDavid Howells cookie->nr_fids++; 5235cf9dd55SDavid Howells } 5245cf9dd55SDavid Howells } else if (cookie->name.len == nlen && 5255cf9dd55SDavid Howells memcmp(cookie->name.name, name, nlen) == 0) { 5265cf9dd55SDavid Howells cookie->fids[0].vnode = ino; 5275cf9dd55SDavid Howells cookie->fids[0].unique = dtype; 5285cf9dd55SDavid Howells cookie->found = 1; 5295cf9dd55SDavid Howells if (cookie->one_only) 5305cf9dd55SDavid Howells return -1; 5315cf9dd55SDavid Howells } 5325cf9dd55SDavid Howells 5335cf9dd55SDavid Howells ret = cookie->nr_fids >= 50 ? -1 : 0; 5345cf9dd55SDavid Howells _leave(" = %d", ret); 5355cf9dd55SDavid Howells return ret; 5365cf9dd55SDavid Howells } 5375cf9dd55SDavid Howells 5385cf9dd55SDavid Howells /* 5395cf9dd55SDavid Howells * Do a lookup in a directory. We make use of bulk lookup to query a slew of 5405cf9dd55SDavid Howells * files in one go and create inodes for them. The inode of the file we were 5415cf9dd55SDavid Howells * asked for is returned. 5425cf9dd55SDavid Howells */ 5435cf9dd55SDavid Howells static struct inode *afs_do_lookup(struct inode *dir, struct dentry *dentry, 5445cf9dd55SDavid Howells struct key *key) 5455cf9dd55SDavid Howells { 5465cf9dd55SDavid Howells struct afs_lookup_cookie *cookie; 5475cf9dd55SDavid Howells struct afs_cb_interest *cbi = NULL; 5485cf9dd55SDavid Howells struct afs_super_info *as = dir->i_sb->s_fs_info; 5495cf9dd55SDavid Howells struct afs_iget_data data; 5505cf9dd55SDavid Howells struct afs_fs_cursor fc; 5515cf9dd55SDavid Howells struct afs_vnode *dvnode = AFS_FS_I(dir); 5525cf9dd55SDavid Howells struct inode *inode = NULL; 5535cf9dd55SDavid Howells int ret, i; 5545cf9dd55SDavid Howells 5555cf9dd55SDavid Howells _enter("{%lu},%p{%pd},", dir->i_ino, dentry, dentry); 5565cf9dd55SDavid Howells 5575cf9dd55SDavid Howells cookie = kzalloc(sizeof(struct afs_lookup_cookie), GFP_KERNEL); 5585cf9dd55SDavid Howells if (!cookie) 5595cf9dd55SDavid Howells return ERR_PTR(-ENOMEM); 5605cf9dd55SDavid Howells 5615cf9dd55SDavid Howells cookie->ctx.actor = afs_lookup_filldir; 5625cf9dd55SDavid Howells cookie->name = dentry->d_name; 5635cf9dd55SDavid Howells cookie->nr_fids = 1; /* slot 0 is saved for the fid we actually want */ 5645cf9dd55SDavid Howells 5655cf9dd55SDavid Howells read_seqlock_excl(&dvnode->cb_lock); 5665cf9dd55SDavid Howells if (dvnode->cb_interest && 5675cf9dd55SDavid Howells dvnode->cb_interest->server && 5685cf9dd55SDavid Howells test_bit(AFS_SERVER_FL_NO_IBULK, &dvnode->cb_interest->server->flags)) 5695cf9dd55SDavid Howells cookie->one_only = true; 5705cf9dd55SDavid Howells read_sequnlock_excl(&dvnode->cb_lock); 5715cf9dd55SDavid Howells 5725cf9dd55SDavid Howells for (i = 0; i < 50; i++) 5735cf9dd55SDavid Howells cookie->fids[i].vid = as->volume->vid; 5745cf9dd55SDavid Howells 5755cf9dd55SDavid Howells /* search the directory */ 5765cf9dd55SDavid Howells ret = afs_dir_iterate(dir, &cookie->ctx, key); 5775cf9dd55SDavid Howells if (ret < 0) { 5785cf9dd55SDavid Howells inode = ERR_PTR(ret); 5795cf9dd55SDavid Howells goto out; 5805cf9dd55SDavid Howells } 5815cf9dd55SDavid Howells 5825cf9dd55SDavid Howells inode = ERR_PTR(-ENOENT); 5835cf9dd55SDavid Howells if (!cookie->found) 5845cf9dd55SDavid Howells goto out; 5855cf9dd55SDavid Howells 5865cf9dd55SDavid Howells /* Check to see if we already have an inode for the primary fid. */ 5875cf9dd55SDavid Howells data.volume = dvnode->volume; 5885cf9dd55SDavid Howells data.fid = cookie->fids[0]; 5895cf9dd55SDavid Howells inode = ilookup5(dir->i_sb, cookie->fids[0].vnode, afs_iget5_test, &data); 5905cf9dd55SDavid Howells if (inode) 5915cf9dd55SDavid Howells goto out; 5925cf9dd55SDavid Howells 5935cf9dd55SDavid Howells /* Need space for examining all the selected files */ 5945cf9dd55SDavid Howells inode = ERR_PTR(-ENOMEM); 5955cf9dd55SDavid Howells cookie->statuses = kcalloc(cookie->nr_fids, sizeof(struct afs_file_status), 5965cf9dd55SDavid Howells GFP_KERNEL); 5975cf9dd55SDavid Howells if (!cookie->statuses) 5985cf9dd55SDavid Howells goto out; 5995cf9dd55SDavid Howells 6005cf9dd55SDavid Howells cookie->callbacks = kcalloc(cookie->nr_fids, sizeof(struct afs_callback), 6015cf9dd55SDavid Howells GFP_KERNEL); 6025cf9dd55SDavid Howells if (!cookie->callbacks) 6035cf9dd55SDavid Howells goto out_s; 6045cf9dd55SDavid Howells 6055cf9dd55SDavid Howells /* Try FS.InlineBulkStatus first. Abort codes for the individual 6065cf9dd55SDavid Howells * lookups contained therein are stored in the reply without aborting 6075cf9dd55SDavid Howells * the whole operation. 6085cf9dd55SDavid Howells */ 6095cf9dd55SDavid Howells if (cookie->one_only) 6105cf9dd55SDavid Howells goto no_inline_bulk_status; 6115cf9dd55SDavid Howells 6125cf9dd55SDavid Howells inode = ERR_PTR(-ERESTARTSYS); 6135cf9dd55SDavid Howells if (afs_begin_vnode_operation(&fc, dvnode, key)) { 6145cf9dd55SDavid Howells while (afs_select_fileserver(&fc)) { 6155cf9dd55SDavid Howells if (test_bit(AFS_SERVER_FL_NO_IBULK, 6165cf9dd55SDavid Howells &fc.cbi->server->flags)) { 6175cf9dd55SDavid Howells fc.ac.abort_code = RX_INVALID_OPERATION; 6185cf9dd55SDavid Howells fc.ac.error = -ECONNABORTED; 6195cf9dd55SDavid Howells break; 6205cf9dd55SDavid Howells } 6215cf9dd55SDavid Howells afs_fs_inline_bulk_status(&fc, 6225cf9dd55SDavid Howells afs_v2net(dvnode), 6235cf9dd55SDavid Howells cookie->fids, 6245cf9dd55SDavid Howells cookie->statuses, 6255cf9dd55SDavid Howells cookie->callbacks, 6265cf9dd55SDavid Howells cookie->nr_fids, NULL); 6275cf9dd55SDavid Howells } 6285cf9dd55SDavid Howells 6295cf9dd55SDavid Howells if (fc.ac.error == 0) 6305cf9dd55SDavid Howells cbi = afs_get_cb_interest(fc.cbi); 6315cf9dd55SDavid Howells if (fc.ac.abort_code == RX_INVALID_OPERATION) 6325cf9dd55SDavid Howells set_bit(AFS_SERVER_FL_NO_IBULK, &fc.cbi->server->flags); 6335cf9dd55SDavid Howells inode = ERR_PTR(afs_end_vnode_operation(&fc)); 6345cf9dd55SDavid Howells } 6355cf9dd55SDavid Howells 6365cf9dd55SDavid Howells if (!IS_ERR(inode)) 6375cf9dd55SDavid Howells goto success; 6385cf9dd55SDavid Howells if (fc.ac.abort_code != RX_INVALID_OPERATION) 6395cf9dd55SDavid Howells goto out_c; 6405cf9dd55SDavid Howells 6415cf9dd55SDavid Howells no_inline_bulk_status: 6425cf9dd55SDavid Howells /* We could try FS.BulkStatus next, but this aborts the entire op if 6435cf9dd55SDavid Howells * any of the lookups fails - so, for the moment, revert to 6445cf9dd55SDavid Howells * FS.FetchStatus for just the primary fid. 6455cf9dd55SDavid Howells */ 6465cf9dd55SDavid Howells cookie->nr_fids = 1; 6475cf9dd55SDavid Howells inode = ERR_PTR(-ERESTARTSYS); 6485cf9dd55SDavid Howells if (afs_begin_vnode_operation(&fc, dvnode, key)) { 6495cf9dd55SDavid Howells while (afs_select_fileserver(&fc)) { 6505cf9dd55SDavid Howells afs_fs_fetch_status(&fc, 6515cf9dd55SDavid Howells afs_v2net(dvnode), 6525cf9dd55SDavid Howells cookie->fids, 6535cf9dd55SDavid Howells cookie->statuses, 6545cf9dd55SDavid Howells cookie->callbacks, 6555cf9dd55SDavid Howells NULL); 6565cf9dd55SDavid Howells } 6575cf9dd55SDavid Howells 6585cf9dd55SDavid Howells if (fc.ac.error == 0) 6595cf9dd55SDavid Howells cbi = afs_get_cb_interest(fc.cbi); 6605cf9dd55SDavid Howells inode = ERR_PTR(afs_end_vnode_operation(&fc)); 6615cf9dd55SDavid Howells } 6625cf9dd55SDavid Howells 6635cf9dd55SDavid Howells if (IS_ERR(inode)) 6645cf9dd55SDavid Howells goto out_c; 6655cf9dd55SDavid Howells 6665cf9dd55SDavid Howells for (i = 0; i < cookie->nr_fids; i++) 6675cf9dd55SDavid Howells cookie->statuses[i].abort_code = 0; 6685cf9dd55SDavid Howells 6695cf9dd55SDavid Howells success: 6705cf9dd55SDavid Howells /* Turn all the files into inodes and save the first one - which is the 6715cf9dd55SDavid Howells * one we actually want. 6725cf9dd55SDavid Howells */ 6735cf9dd55SDavid Howells if (cookie->statuses[0].abort_code != 0) 6745cf9dd55SDavid Howells inode = ERR_PTR(afs_abort_to_error(cookie->statuses[0].abort_code)); 6755cf9dd55SDavid Howells 6765cf9dd55SDavid Howells for (i = 0; i < cookie->nr_fids; i++) { 6775cf9dd55SDavid Howells struct inode *ti; 6785cf9dd55SDavid Howells 6795cf9dd55SDavid Howells if (cookie->statuses[i].abort_code != 0) 6805cf9dd55SDavid Howells continue; 6815cf9dd55SDavid Howells 6825cf9dd55SDavid Howells ti = afs_iget(dir->i_sb, key, &cookie->fids[i], 6835cf9dd55SDavid Howells &cookie->statuses[i], 6845cf9dd55SDavid Howells &cookie->callbacks[i], 6855cf9dd55SDavid Howells cbi); 6865cf9dd55SDavid Howells if (i == 0) { 6875cf9dd55SDavid Howells inode = ti; 6885cf9dd55SDavid Howells } else { 6895cf9dd55SDavid Howells if (!IS_ERR(ti)) 6905cf9dd55SDavid Howells iput(ti); 6915cf9dd55SDavid Howells } 6925cf9dd55SDavid Howells } 6935cf9dd55SDavid Howells 6945cf9dd55SDavid Howells out_c: 6955cf9dd55SDavid Howells afs_put_cb_interest(afs_v2net(dvnode), cbi); 6965cf9dd55SDavid Howells kfree(cookie->callbacks); 6975cf9dd55SDavid Howells out_s: 6985cf9dd55SDavid Howells kfree(cookie->statuses); 6995cf9dd55SDavid Howells out: 7005cf9dd55SDavid Howells kfree(cookie); 7015cf9dd55SDavid Howells return inode; 7025cf9dd55SDavid Howells } 7035cf9dd55SDavid Howells 7045cf9dd55SDavid Howells /* 7054d673da1SDavid Howells * Probe to see if a cell may exist. This prevents positive dentries from 7064d673da1SDavid Howells * being created unnecessarily. 7074d673da1SDavid Howells */ 7084d673da1SDavid Howells static int afs_probe_cell_name(struct dentry *dentry) 7094d673da1SDavid Howells { 7104d673da1SDavid Howells struct afs_cell *cell; 7114d673da1SDavid Howells const char *name = dentry->d_name.name; 7124d673da1SDavid Howells size_t len = dentry->d_name.len; 7134d673da1SDavid Howells int ret; 7144d673da1SDavid Howells 7154d673da1SDavid Howells /* Names prefixed with a dot are R/W mounts. */ 7164d673da1SDavid Howells if (name[0] == '.') { 7174d673da1SDavid Howells if (len == 1) 7184d673da1SDavid Howells return -EINVAL; 7194d673da1SDavid Howells name++; 7204d673da1SDavid Howells len--; 7214d673da1SDavid Howells } 7224d673da1SDavid Howells 7234d673da1SDavid Howells cell = afs_lookup_cell_rcu(afs_d2net(dentry), name, len); 7244d673da1SDavid Howells if (!IS_ERR(cell)) { 7254d673da1SDavid Howells afs_put_cell(afs_d2net(dentry), cell); 7264d673da1SDavid Howells return 0; 7274d673da1SDavid Howells } 7284d673da1SDavid Howells 7294d673da1SDavid Howells ret = dns_query("afsdb", name, len, "ipv4", NULL, NULL); 7304d673da1SDavid Howells if (ret == -ENODATA) 7314d673da1SDavid Howells ret = -EDESTADDRREQ; 7324d673da1SDavid Howells return ret; 7334d673da1SDavid Howells } 7344d673da1SDavid Howells 7354d673da1SDavid Howells /* 736bec5eb61Swanglei * Try to auto mount the mountpoint with pseudo directory, if the autocell 737bec5eb61Swanglei * operation is setted. 738bec5eb61Swanglei */ 7395cf9dd55SDavid Howells static struct inode *afs_try_auto_mntpt(struct dentry *dentry, struct inode *dir) 740bec5eb61Swanglei { 741bec5eb61Swanglei struct afs_vnode *vnode = AFS_FS_I(dir); 742bec5eb61Swanglei struct inode *inode; 7434d673da1SDavid Howells int ret = -ENOENT; 744bec5eb61Swanglei 7454d673da1SDavid Howells _enter("%p{%pd}, {%x:%u}", 7464d673da1SDavid Howells dentry, dentry, vnode->fid.vid, vnode->fid.vnode); 747bec5eb61Swanglei 7484d673da1SDavid Howells if (!test_bit(AFS_VNODE_AUTOCELL, &vnode->flags)) 749bec5eb61Swanglei goto out; 750bec5eb61Swanglei 7514d673da1SDavid Howells ret = afs_probe_cell_name(dentry); 7524d673da1SDavid Howells if (ret < 0) 7534d673da1SDavid Howells goto out; 7544d673da1SDavid Howells 7554d673da1SDavid Howells inode = afs_iget_pseudo_dir(dir->i_sb, false); 756bec5eb61Swanglei if (IS_ERR(inode)) { 757bec5eb61Swanglei ret = PTR_ERR(inode); 758bec5eb61Swanglei goto out; 759bec5eb61Swanglei } 760bec5eb61Swanglei 761bec5eb61Swanglei _leave("= %p", inode); 762bec5eb61Swanglei return inode; 763bec5eb61Swanglei 764bec5eb61Swanglei out: 765bec5eb61Swanglei _leave("= %d", ret); 766bec5eb61Swanglei return ERR_PTR(ret); 767bec5eb61Swanglei } 768bec5eb61Swanglei 769bec5eb61Swanglei /* 7706f8880d8SDavid Howells * Look up an entry in a directory with @sys substitution. 7716f8880d8SDavid Howells */ 7726f8880d8SDavid Howells static struct dentry *afs_lookup_atsys(struct inode *dir, struct dentry *dentry, 7736f8880d8SDavid Howells struct key *key) 7746f8880d8SDavid Howells { 7756f8880d8SDavid Howells struct afs_sysnames *subs; 7766f8880d8SDavid Howells struct afs_net *net = afs_i2net(dir); 7776f8880d8SDavid Howells struct dentry *ret; 7786f8880d8SDavid Howells char *buf, *p, *name; 7796f8880d8SDavid Howells int len, i; 7806f8880d8SDavid Howells 7816f8880d8SDavid Howells _enter(""); 7826f8880d8SDavid Howells 7836f8880d8SDavid Howells ret = ERR_PTR(-ENOMEM); 7846f8880d8SDavid Howells p = buf = kmalloc(AFSNAMEMAX, GFP_KERNEL); 7856f8880d8SDavid Howells if (!buf) 7866f8880d8SDavid Howells goto out_p; 7876f8880d8SDavid Howells if (dentry->d_name.len > 4) { 7886f8880d8SDavid Howells memcpy(p, dentry->d_name.name, dentry->d_name.len - 4); 7896f8880d8SDavid Howells p += dentry->d_name.len - 4; 7906f8880d8SDavid Howells } 7916f8880d8SDavid Howells 7926f8880d8SDavid Howells /* There is an ordered list of substitutes that we have to try. */ 7936f8880d8SDavid Howells read_lock(&net->sysnames_lock); 7946f8880d8SDavid Howells subs = net->sysnames; 7956f8880d8SDavid Howells refcount_inc(&subs->usage); 7966f8880d8SDavid Howells read_unlock(&net->sysnames_lock); 7976f8880d8SDavid Howells 7986f8880d8SDavid Howells for (i = 0; i < subs->nr; i++) { 7996f8880d8SDavid Howells name = subs->subs[i]; 8006f8880d8SDavid Howells len = dentry->d_name.len - 4 + strlen(name); 8016f8880d8SDavid Howells if (len >= AFSNAMEMAX) { 8026f8880d8SDavid Howells ret = ERR_PTR(-ENAMETOOLONG); 8036f8880d8SDavid Howells goto out_s; 8046f8880d8SDavid Howells } 8056f8880d8SDavid Howells 8066f8880d8SDavid Howells strcpy(p, name); 8076f8880d8SDavid Howells ret = lookup_one_len(buf, dentry->d_parent, len); 8086f8880d8SDavid Howells if (IS_ERR(ret) || d_is_positive(ret)) 8096f8880d8SDavid Howells goto out_s; 8106f8880d8SDavid Howells dput(ret); 8116f8880d8SDavid Howells } 8126f8880d8SDavid Howells 8136f8880d8SDavid Howells /* We don't want to d_add() the @sys dentry here as we don't want to 8146f8880d8SDavid Howells * the cached dentry to hide changes to the sysnames list. 8156f8880d8SDavid Howells */ 8166f8880d8SDavid Howells ret = NULL; 8176f8880d8SDavid Howells out_s: 8186f8880d8SDavid Howells afs_put_sysnames(subs); 8196f8880d8SDavid Howells kfree(buf); 8206f8880d8SDavid Howells out_p: 8216f8880d8SDavid Howells key_put(key); 8226f8880d8SDavid Howells return ret; 8236f8880d8SDavid Howells } 8246f8880d8SDavid Howells 8256f8880d8SDavid Howells /* 82608e0e7c8SDavid Howells * look up an entry in a directory 82708e0e7c8SDavid Howells */ 828260a9803SDavid Howells static struct dentry *afs_lookup(struct inode *dir, struct dentry *dentry, 82900cd8dd3SAl Viro unsigned int flags) 83008e0e7c8SDavid Howells { 8315cf9dd55SDavid Howells struct afs_vnode *dvnode = AFS_FS_I(dir); 83208e0e7c8SDavid Howells struct inode *inode; 83300d3b7a4SDavid Howells struct key *key; 83408e0e7c8SDavid Howells int ret; 83508e0e7c8SDavid Howells 836a455589fSAl Viro _enter("{%x:%u},%p{%pd},", 8375cf9dd55SDavid Howells dvnode->fid.vid, dvnode->fid.vnode, dentry, dentry); 838260a9803SDavid Howells 8392b0143b5SDavid Howells ASSERTCMP(d_inode(dentry), ==, NULL); 84008e0e7c8SDavid Howells 84145222b9eSDavid Howells if (dentry->d_name.len >= AFSNAMEMAX) { 84208e0e7c8SDavid Howells _leave(" = -ENAMETOOLONG"); 84308e0e7c8SDavid Howells return ERR_PTR(-ENAMETOOLONG); 84408e0e7c8SDavid Howells } 84508e0e7c8SDavid Howells 8465cf9dd55SDavid Howells if (test_bit(AFS_VNODE_DELETED, &dvnode->flags)) { 84708e0e7c8SDavid Howells _leave(" = -ESTALE"); 84808e0e7c8SDavid Howells return ERR_PTR(-ESTALE); 84908e0e7c8SDavid Howells } 85008e0e7c8SDavid Howells 8515cf9dd55SDavid Howells key = afs_request_key(dvnode->volume->cell); 85200d3b7a4SDavid Howells if (IS_ERR(key)) { 85300d3b7a4SDavid Howells _leave(" = %ld [key]", PTR_ERR(key)); 854e231c2eeSDavid Howells return ERR_CAST(key); 85500d3b7a4SDavid Howells } 85600d3b7a4SDavid Howells 8575cf9dd55SDavid Howells ret = afs_validate(dvnode, key); 85808e0e7c8SDavid Howells if (ret < 0) { 85900d3b7a4SDavid Howells key_put(key); 860260a9803SDavid Howells _leave(" = %d [val]", ret); 8611da177e4SLinus Torvalds return ERR_PTR(ret); 8621da177e4SLinus Torvalds } 8631da177e4SLinus Torvalds 8646f8880d8SDavid Howells if (dentry->d_name.len >= 4 && 8656f8880d8SDavid Howells dentry->d_name.name[dentry->d_name.len - 4] == '@' && 8666f8880d8SDavid Howells dentry->d_name.name[dentry->d_name.len - 3] == 's' && 8676f8880d8SDavid Howells dentry->d_name.name[dentry->d_name.len - 2] == 'y' && 8686f8880d8SDavid Howells dentry->d_name.name[dentry->d_name.len - 1] == 's') 8696f8880d8SDavid Howells return afs_lookup_atsys(dir, dentry, key); 8706f8880d8SDavid Howells 8715cf9dd55SDavid Howells inode = afs_do_lookup(dir, dentry, key); 8725cf9dd55SDavid Howells if (IS_ERR(inode)) { 8735cf9dd55SDavid Howells ret = PTR_ERR(inode); 8744d673da1SDavid Howells if (ret == -ENOENT) { 8755cf9dd55SDavid Howells inode = afs_try_auto_mntpt(dentry, dir); 876bec5eb61Swanglei if (!IS_ERR(inode)) { 877bec5eb61Swanglei key_put(key); 878bec5eb61Swanglei goto success; 879bec5eb61Swanglei } 880bec5eb61Swanglei 881bec5eb61Swanglei ret = PTR_ERR(inode); 8824d673da1SDavid Howells } 8834d673da1SDavid Howells 884260a9803SDavid Howells key_put(key); 885260a9803SDavid Howells if (ret == -ENOENT) { 886260a9803SDavid Howells d_add(dentry, NULL); 887260a9803SDavid Howells _leave(" = NULL [negative]"); 888260a9803SDavid Howells return NULL; 889260a9803SDavid Howells } 890260a9803SDavid Howells _leave(" = %d [do]", ret); 891260a9803SDavid Howells return ERR_PTR(ret); 892260a9803SDavid Howells } 8935cf9dd55SDavid Howells dentry->d_fsdata = (void *)(unsigned long)dvnode->status.data_version; 894260a9803SDavid Howells 8951da177e4SLinus Torvalds /* instantiate the dentry */ 89600d3b7a4SDavid Howells key_put(key); 89708e0e7c8SDavid Howells if (IS_ERR(inode)) { 89808e0e7c8SDavid Howells _leave(" = %ld", PTR_ERR(inode)); 899e231c2eeSDavid Howells return ERR_CAST(inode); 9001da177e4SLinus Torvalds } 9011da177e4SLinus Torvalds 902bec5eb61Swanglei success: 9031da177e4SLinus Torvalds d_add(dentry, inode); 9045cf9dd55SDavid Howells _leave(" = 0 { ino=%lu v=%u }", 9052b0143b5SDavid Howells d_inode(dentry)->i_ino, 9062b0143b5SDavid Howells d_inode(dentry)->i_generation); 9071da177e4SLinus Torvalds 9081da177e4SLinus Torvalds return NULL; 909ec26815aSDavid Howells } 9101da177e4SLinus Torvalds 9111da177e4SLinus Torvalds /* 9124d673da1SDavid Howells * Look up an entry in a dynroot directory. 9134d673da1SDavid Howells */ 9144d673da1SDavid Howells static struct dentry *afs_dynroot_lookup(struct inode *dir, struct dentry *dentry, 9154d673da1SDavid Howells unsigned int flags) 9164d673da1SDavid Howells { 9174d673da1SDavid Howells struct afs_vnode *vnode; 9184d673da1SDavid Howells struct inode *inode; 9194d673da1SDavid Howells int ret; 9204d673da1SDavid Howells 9214d673da1SDavid Howells vnode = AFS_FS_I(dir); 9224d673da1SDavid Howells 9234d673da1SDavid Howells _enter("%pd", dentry); 9244d673da1SDavid Howells 9254d673da1SDavid Howells ASSERTCMP(d_inode(dentry), ==, NULL); 9264d673da1SDavid Howells 9274d673da1SDavid Howells if (dentry->d_name.len >= AFSNAMEMAX) { 9284d673da1SDavid Howells _leave(" = -ENAMETOOLONG"); 9294d673da1SDavid Howells return ERR_PTR(-ENAMETOOLONG); 9304d673da1SDavid Howells } 9314d673da1SDavid Howells 9325cf9dd55SDavid Howells inode = afs_try_auto_mntpt(dentry, dir); 9334d673da1SDavid Howells if (IS_ERR(inode)) { 9344d673da1SDavid Howells ret = PTR_ERR(inode); 9354d673da1SDavid Howells if (ret == -ENOENT) { 9364d673da1SDavid Howells d_add(dentry, NULL); 9374d673da1SDavid Howells _leave(" = NULL [negative]"); 9384d673da1SDavid Howells return NULL; 9394d673da1SDavid Howells } 9404d673da1SDavid Howells _leave(" = %d [do]", ret); 9414d673da1SDavid Howells return ERR_PTR(ret); 9424d673da1SDavid Howells } 9434d673da1SDavid Howells 9444d673da1SDavid Howells d_add(dentry, inode); 9454d673da1SDavid Howells _leave(" = 0 { ino=%lu v=%u }", 9464d673da1SDavid Howells d_inode(dentry)->i_ino, d_inode(dentry)->i_generation); 9474d673da1SDavid Howells return NULL; 9484d673da1SDavid Howells } 9494d673da1SDavid Howells 9504d673da1SDavid Howells /* 9511da177e4SLinus Torvalds * check that a dentry lookup hit has found a valid entry 9521da177e4SLinus Torvalds * - NOTE! the hit can be a negative hit too, so we can't assume we have an 9531da177e4SLinus Torvalds * inode 9541da177e4SLinus Torvalds */ 9550b728e19SAl Viro static int afs_d_revalidate(struct dentry *dentry, unsigned int flags) 9561da177e4SLinus Torvalds { 9574d673da1SDavid Howells struct afs_super_info *as = dentry->d_sb->s_fs_info; 958260a9803SDavid Howells struct afs_vnode *vnode, *dir; 959dd0d9a46SArtem Bityutskiy struct afs_fid uninitialized_var(fid); 9601da177e4SLinus Torvalds struct dentry *parent; 961c435ee34SDavid Howells struct inode *inode; 96200d3b7a4SDavid Howells struct key *key; 963260a9803SDavid Howells void *dir_version; 9641da177e4SLinus Torvalds int ret; 9651da177e4SLinus Torvalds 9660b728e19SAl Viro if (flags & LOOKUP_RCU) 96734286d66SNick Piggin return -ECHILD; 96834286d66SNick Piggin 9694d673da1SDavid Howells if (as->dyn_root) 9704d673da1SDavid Howells return 1; 9714d673da1SDavid Howells 972c435ee34SDavid Howells if (d_really_is_positive(dentry)) { 9732b0143b5SDavid Howells vnode = AFS_FS_I(d_inode(dentry)); 974a455589fSAl Viro _enter("{v={%x:%u} n=%pd fl=%lx},", 975a455589fSAl Viro vnode->fid.vid, vnode->fid.vnode, dentry, 976260a9803SDavid Howells vnode->flags); 977c435ee34SDavid Howells } else { 978a455589fSAl Viro _enter("{neg n=%pd}", dentry); 979c435ee34SDavid Howells } 9801da177e4SLinus Torvalds 981260a9803SDavid Howells key = afs_request_key(AFS_FS_S(dentry->d_sb)->volume->cell); 98200d3b7a4SDavid Howells if (IS_ERR(key)) 98300d3b7a4SDavid Howells key = NULL; 98400d3b7a4SDavid Howells 985c435ee34SDavid Howells if (d_really_is_positive(dentry)) { 986c435ee34SDavid Howells inode = d_inode(dentry); 987c435ee34SDavid Howells if (inode) { 988c435ee34SDavid Howells vnode = AFS_FS_I(inode); 989c435ee34SDavid Howells afs_validate(vnode, key); 990c435ee34SDavid Howells if (test_bit(AFS_VNODE_DELETED, &vnode->flags)) 991c435ee34SDavid Howells goto out_bad; 992c435ee34SDavid Howells } 993c435ee34SDavid Howells } 994c435ee34SDavid Howells 9951da177e4SLinus Torvalds /* lock down the parent dentry so we can peer at it */ 99608e0e7c8SDavid Howells parent = dget_parent(dentry); 9972b0143b5SDavid Howells dir = AFS_FS_I(d_inode(parent)); 9981da177e4SLinus Torvalds 999260a9803SDavid Howells /* validate the parent directory */ 1000260a9803SDavid Howells afs_validate(dir, key); 1001260a9803SDavid Howells 1002260a9803SDavid Howells if (test_bit(AFS_VNODE_DELETED, &dir->flags)) { 1003a455589fSAl Viro _debug("%pd: parent dir deleted", dentry); 1004c435ee34SDavid Howells goto out_bad_parent; 10051da177e4SLinus Torvalds } 10061da177e4SLinus Torvalds 1007260a9803SDavid Howells dir_version = (void *) (unsigned long) dir->status.data_version; 1008260a9803SDavid Howells if (dentry->d_fsdata == dir_version) 1009260a9803SDavid Howells goto out_valid; /* the dir contents are unchanged */ 1010260a9803SDavid Howells 101108e0e7c8SDavid Howells _debug("dir modified"); 10121da177e4SLinus Torvalds 10131da177e4SLinus Torvalds /* search the directory for this vnode */ 10145cf9dd55SDavid Howells ret = afs_do_lookup_one(&dir->vfs_inode, dentry, &fid, key); 1015260a9803SDavid Howells switch (ret) { 1016260a9803SDavid Howells case 0: 1017260a9803SDavid Howells /* the filename maps to something */ 10182b0143b5SDavid Howells if (d_really_is_negative(dentry)) 1019c435ee34SDavid Howells goto out_bad_parent; 1020c435ee34SDavid Howells inode = d_inode(dentry); 1021c435ee34SDavid Howells if (is_bad_inode(inode)) { 1022a455589fSAl Viro printk("kAFS: afs_d_revalidate: %pd2 has bad inode\n", 1023a455589fSAl Viro dentry); 1024c435ee34SDavid Howells goto out_bad_parent; 10251da177e4SLinus Torvalds } 10261da177e4SLinus Torvalds 1027c435ee34SDavid Howells vnode = AFS_FS_I(inode); 1028c435ee34SDavid Howells 10291da177e4SLinus Torvalds /* if the vnode ID has changed, then the dirent points to a 10301da177e4SLinus Torvalds * different file */ 103108e0e7c8SDavid Howells if (fid.vnode != vnode->fid.vnode) { 1032a455589fSAl Viro _debug("%pd: dirent changed [%u != %u]", 1033a455589fSAl Viro dentry, fid.vnode, 103408e0e7c8SDavid Howells vnode->fid.vnode); 10351da177e4SLinus Torvalds goto not_found; 10361da177e4SLinus Torvalds } 10371da177e4SLinus Torvalds 10381da177e4SLinus Torvalds /* if the vnode ID uniqifier has changed, then the file has 1039260a9803SDavid Howells * been deleted and replaced, and the original vnode ID has 1040260a9803SDavid Howells * been reused */ 104108e0e7c8SDavid Howells if (fid.unique != vnode->fid.unique) { 1042a455589fSAl Viro _debug("%pd: file deleted (uq %u -> %u I:%u)", 1043a455589fSAl Viro dentry, fid.unique, 10447a224228SJean Noel Cordenner vnode->fid.unique, 1045c435ee34SDavid Howells vnode->vfs_inode.i_generation); 1046c435ee34SDavid Howells write_seqlock(&vnode->cb_lock); 104708e0e7c8SDavid Howells set_bit(AFS_VNODE_DELETED, &vnode->flags); 1048c435ee34SDavid Howells write_sequnlock(&vnode->cb_lock); 1049260a9803SDavid Howells goto not_found; 1050260a9803SDavid Howells } 1051260a9803SDavid Howells goto out_valid; 1052260a9803SDavid Howells 1053260a9803SDavid Howells case -ENOENT: 1054260a9803SDavid Howells /* the filename is unknown */ 1055a455589fSAl Viro _debug("%pd: dirent not found", dentry); 10562b0143b5SDavid Howells if (d_really_is_positive(dentry)) 1057260a9803SDavid Howells goto not_found; 1058260a9803SDavid Howells goto out_valid; 1059260a9803SDavid Howells 1060260a9803SDavid Howells default: 1061a455589fSAl Viro _debug("failed to iterate dir %pd: %d", 1062a455589fSAl Viro parent, ret); 1063c435ee34SDavid Howells goto out_bad_parent; 10641da177e4SLinus Torvalds } 106508e0e7c8SDavid Howells 10661da177e4SLinus Torvalds out_valid: 1067260a9803SDavid Howells dentry->d_fsdata = dir_version; 10681da177e4SLinus Torvalds dput(parent); 106900d3b7a4SDavid Howells key_put(key); 10701da177e4SLinus Torvalds _leave(" = 1 [valid]"); 10711da177e4SLinus Torvalds return 1; 10721da177e4SLinus Torvalds 10731da177e4SLinus Torvalds /* the dirent, if it exists, now points to a different vnode */ 10741da177e4SLinus Torvalds not_found: 10751da177e4SLinus Torvalds spin_lock(&dentry->d_lock); 10761da177e4SLinus Torvalds dentry->d_flags |= DCACHE_NFSFS_RENAMED; 10771da177e4SLinus Torvalds spin_unlock(&dentry->d_lock); 10781da177e4SLinus Torvalds 1079c435ee34SDavid Howells out_bad_parent: 1080a455589fSAl Viro _debug("dropping dentry %pd2", dentry); 10811da177e4SLinus Torvalds dput(parent); 1082c435ee34SDavid Howells out_bad: 108300d3b7a4SDavid Howells key_put(key); 10841da177e4SLinus Torvalds 10851da177e4SLinus Torvalds _leave(" = 0 [bad]"); 10861da177e4SLinus Torvalds return 0; 1087ec26815aSDavid Howells } 10881da177e4SLinus Torvalds 10891da177e4SLinus Torvalds /* 10901da177e4SLinus Torvalds * allow the VFS to enquire as to whether a dentry should be unhashed (mustn't 10911da177e4SLinus Torvalds * sleep) 10921da177e4SLinus Torvalds * - called from dput() when d_count is going to 0. 10931da177e4SLinus Torvalds * - return 1 to request dentry be unhashed, 0 otherwise 10941da177e4SLinus Torvalds */ 1095fe15ce44SNick Piggin static int afs_d_delete(const struct dentry *dentry) 10961da177e4SLinus Torvalds { 1097a455589fSAl Viro _enter("%pd", dentry); 10981da177e4SLinus Torvalds 10991da177e4SLinus Torvalds if (dentry->d_flags & DCACHE_NFSFS_RENAMED) 11001da177e4SLinus Torvalds goto zap; 11011da177e4SLinus Torvalds 11022b0143b5SDavid Howells if (d_really_is_positive(dentry) && 11032b0143b5SDavid Howells (test_bit(AFS_VNODE_DELETED, &AFS_FS_I(d_inode(dentry))->flags) || 11042b0143b5SDavid Howells test_bit(AFS_VNODE_PSEUDODIR, &AFS_FS_I(d_inode(dentry))->flags))) 11051da177e4SLinus Torvalds goto zap; 11061da177e4SLinus Torvalds 11071da177e4SLinus Torvalds _leave(" = 0 [keep]"); 11081da177e4SLinus Torvalds return 0; 11091da177e4SLinus Torvalds 11101da177e4SLinus Torvalds zap: 11111da177e4SLinus Torvalds _leave(" = 1 [zap]"); 11121da177e4SLinus Torvalds return 1; 1113ec26815aSDavid Howells } 1114260a9803SDavid Howells 1115260a9803SDavid Howells /* 1116260a9803SDavid Howells * handle dentry release 1117260a9803SDavid Howells */ 1118260a9803SDavid Howells static void afs_d_release(struct dentry *dentry) 1119260a9803SDavid Howells { 1120a455589fSAl Viro _enter("%pd", dentry); 1121260a9803SDavid Howells } 1122260a9803SDavid Howells 1123260a9803SDavid Howells /* 1124d2ddc776SDavid Howells * Create a new inode for create/mkdir/symlink 1125d2ddc776SDavid Howells */ 1126d2ddc776SDavid Howells static void afs_vnode_new_inode(struct afs_fs_cursor *fc, 1127d2ddc776SDavid Howells struct dentry *new_dentry, 1128d2ddc776SDavid Howells struct afs_fid *newfid, 1129d2ddc776SDavid Howells struct afs_file_status *newstatus, 1130d2ddc776SDavid Howells struct afs_callback *newcb) 1131d2ddc776SDavid Howells { 1132d2ddc776SDavid Howells struct inode *inode; 1133d2ddc776SDavid Howells 1134d2ddc776SDavid Howells if (fc->ac.error < 0) 1135d2ddc776SDavid Howells return; 1136d2ddc776SDavid Howells 1137bc1527dcSDavid Howells d_drop(new_dentry); 1138bc1527dcSDavid Howells 1139d2ddc776SDavid Howells inode = afs_iget(fc->vnode->vfs_inode.i_sb, fc->key, 1140d2ddc776SDavid Howells newfid, newstatus, newcb, fc->cbi); 1141d2ddc776SDavid Howells if (IS_ERR(inode)) { 1142d2ddc776SDavid Howells /* ENOMEM or EINTR at a really inconvenient time - just abandon 1143d2ddc776SDavid Howells * the new directory on the server. 1144d2ddc776SDavid Howells */ 1145d2ddc776SDavid Howells fc->ac.error = PTR_ERR(inode); 1146d2ddc776SDavid Howells return; 1147d2ddc776SDavid Howells } 1148d2ddc776SDavid Howells 1149bc1527dcSDavid Howells d_add(new_dentry, inode); 1150d2ddc776SDavid Howells } 1151d2ddc776SDavid Howells 1152d2ddc776SDavid Howells /* 1153260a9803SDavid Howells * create a directory on an AFS filesystem 1154260a9803SDavid Howells */ 115518bb1db3SAl Viro static int afs_mkdir(struct inode *dir, struct dentry *dentry, umode_t mode) 1156260a9803SDavid Howells { 1157d2ddc776SDavid Howells struct afs_file_status newstatus; 1158d2ddc776SDavid Howells struct afs_fs_cursor fc; 1159d2ddc776SDavid Howells struct afs_callback newcb; 1160d2ddc776SDavid Howells struct afs_vnode *dvnode = AFS_FS_I(dir); 1161d2ddc776SDavid Howells struct afs_fid newfid; 1162260a9803SDavid Howells struct key *key; 1163260a9803SDavid Howells int ret; 1164260a9803SDavid Howells 1165d2ddc776SDavid Howells mode |= S_IFDIR; 1166260a9803SDavid Howells 1167a455589fSAl Viro _enter("{%x:%u},{%pd},%ho", 1168a455589fSAl Viro dvnode->fid.vid, dvnode->fid.vnode, dentry, mode); 1169260a9803SDavid Howells 1170260a9803SDavid Howells key = afs_request_key(dvnode->volume->cell); 1171260a9803SDavid Howells if (IS_ERR(key)) { 1172260a9803SDavid Howells ret = PTR_ERR(key); 1173260a9803SDavid Howells goto error; 1174260a9803SDavid Howells } 1175260a9803SDavid Howells 1176d2ddc776SDavid Howells ret = -ERESTARTSYS; 1177d2ddc776SDavid Howells if (afs_begin_vnode_operation(&fc, dvnode, key)) { 1178d2ddc776SDavid Howells while (afs_select_fileserver(&fc)) { 1179d2ddc776SDavid Howells fc.cb_break = dvnode->cb_break + dvnode->cb_s_break; 1180d2ddc776SDavid Howells afs_fs_create(&fc, dentry->d_name.name, mode, 1181d2ddc776SDavid Howells &newfid, &newstatus, &newcb); 1182d2ddc776SDavid Howells } 1183d2ddc776SDavid Howells 1184d2ddc776SDavid Howells afs_check_for_remote_deletion(&fc, fc.vnode); 1185d2ddc776SDavid Howells afs_vnode_commit_status(&fc, dvnode, fc.cb_break); 1186d2ddc776SDavid Howells afs_vnode_new_inode(&fc, dentry, &newfid, &newstatus, &newcb); 1187d2ddc776SDavid Howells ret = afs_end_vnode_operation(&fc); 1188260a9803SDavid Howells if (ret < 0) 1189d2ddc776SDavid Howells goto error_key; 11904433b691SDavid Howells } else { 11914433b691SDavid Howells goto error_key; 1192260a9803SDavid Howells } 1193260a9803SDavid Howells 1194260a9803SDavid Howells key_put(key); 1195260a9803SDavid Howells _leave(" = 0"); 1196260a9803SDavid Howells return 0; 1197260a9803SDavid Howells 1198d2ddc776SDavid Howells error_key: 1199260a9803SDavid Howells key_put(key); 1200260a9803SDavid Howells error: 1201260a9803SDavid Howells d_drop(dentry); 1202260a9803SDavid Howells _leave(" = %d", ret); 1203260a9803SDavid Howells return ret; 1204260a9803SDavid Howells } 1205260a9803SDavid Howells 1206260a9803SDavid Howells /* 1207d2ddc776SDavid Howells * Remove a subdir from a directory. 1208260a9803SDavid Howells */ 1209d2ddc776SDavid Howells static void afs_dir_remove_subdir(struct dentry *dentry) 1210260a9803SDavid Howells { 12112b0143b5SDavid Howells if (d_really_is_positive(dentry)) { 1212d2ddc776SDavid Howells struct afs_vnode *vnode = AFS_FS_I(d_inode(dentry)); 1213d2ddc776SDavid Howells 1214260a9803SDavid Howells clear_nlink(&vnode->vfs_inode); 1215260a9803SDavid Howells set_bit(AFS_VNODE_DELETED, &vnode->flags); 1216c435ee34SDavid Howells clear_bit(AFS_VNODE_CB_PROMISED, &vnode->flags); 1217260a9803SDavid Howells } 1218260a9803SDavid Howells } 1219260a9803SDavid Howells 1220260a9803SDavid Howells /* 1221d2ddc776SDavid Howells * remove a directory from an AFS filesystem 1222260a9803SDavid Howells */ 1223d2ddc776SDavid Howells static int afs_rmdir(struct inode *dir, struct dentry *dentry) 1224260a9803SDavid Howells { 1225d2ddc776SDavid Howells struct afs_fs_cursor fc; 1226d2ddc776SDavid Howells struct afs_vnode *dvnode = AFS_FS_I(dir); 1227260a9803SDavid Howells struct key *key; 1228260a9803SDavid Howells int ret; 1229260a9803SDavid Howells 1230a455589fSAl Viro _enter("{%x:%u},{%pd}", 1231a455589fSAl Viro dvnode->fid.vid, dvnode->fid.vnode, dentry); 1232260a9803SDavid Howells 1233260a9803SDavid Howells key = afs_request_key(dvnode->volume->cell); 1234260a9803SDavid Howells if (IS_ERR(key)) { 1235260a9803SDavid Howells ret = PTR_ERR(key); 1236260a9803SDavid Howells goto error; 1237260a9803SDavid Howells } 1238260a9803SDavid Howells 1239d2ddc776SDavid Howells ret = -ERESTARTSYS; 1240d2ddc776SDavid Howells if (afs_begin_vnode_operation(&fc, dvnode, key)) { 1241d2ddc776SDavid Howells while (afs_select_fileserver(&fc)) { 1242d2ddc776SDavid Howells fc.cb_break = dvnode->cb_break + dvnode->cb_s_break; 1243d2ddc776SDavid Howells afs_fs_remove(&fc, dentry->d_name.name, true); 1244260a9803SDavid Howells } 1245260a9803SDavid Howells 1246d2ddc776SDavid Howells afs_vnode_commit_status(&fc, dvnode, fc.cb_break); 1247d2ddc776SDavid Howells ret = afs_end_vnode_operation(&fc); 1248d2ddc776SDavid Howells if (ret == 0) 1249d2ddc776SDavid Howells afs_dir_remove_subdir(dentry); 1250260a9803SDavid Howells } 1251260a9803SDavid Howells 1252260a9803SDavid Howells key_put(key); 1253d2ddc776SDavid Howells error: 1254d2ddc776SDavid Howells return ret; 1255d2ddc776SDavid Howells } 1256260a9803SDavid Howells 1257d2ddc776SDavid Howells /* 1258d2ddc776SDavid Howells * Remove a link to a file or symlink from a directory. 1259d2ddc776SDavid Howells * 1260d2ddc776SDavid Howells * If the file was not deleted due to excess hard links, the fileserver will 1261d2ddc776SDavid Howells * break the callback promise on the file - if it had one - before it returns 1262d2ddc776SDavid Howells * to us, and if it was deleted, it won't 1263d2ddc776SDavid Howells * 1264d2ddc776SDavid Howells * However, if we didn't have a callback promise outstanding, or it was 1265d2ddc776SDavid Howells * outstanding on a different server, then it won't break it either... 1266d2ddc776SDavid Howells */ 1267440fbc3aSDavid Howells static int afs_dir_remove_link(struct dentry *dentry, struct key *key, 1268440fbc3aSDavid Howells unsigned long d_version_before, 1269440fbc3aSDavid Howells unsigned long d_version_after) 1270d2ddc776SDavid Howells { 1271440fbc3aSDavid Howells bool dir_valid; 1272d2ddc776SDavid Howells int ret = 0; 1273d2ddc776SDavid Howells 1274440fbc3aSDavid Howells /* There were no intervening changes on the server if the version 1275440fbc3aSDavid Howells * number we got back was incremented by exactly 1. 1276440fbc3aSDavid Howells */ 1277440fbc3aSDavid Howells dir_valid = (d_version_after == d_version_before + 1); 1278440fbc3aSDavid Howells 1279d2ddc776SDavid Howells if (d_really_is_positive(dentry)) { 1280d2ddc776SDavid Howells struct afs_vnode *vnode = AFS_FS_I(d_inode(dentry)); 1281d2ddc776SDavid Howells 1282440fbc3aSDavid Howells if (dir_valid) { 1283440fbc3aSDavid Howells drop_nlink(&vnode->vfs_inode); 1284440fbc3aSDavid Howells if (vnode->vfs_inode.i_nlink == 0) { 1285440fbc3aSDavid Howells set_bit(AFS_VNODE_DELETED, &vnode->flags); 1286440fbc3aSDavid Howells clear_bit(AFS_VNODE_CB_PROMISED, &vnode->flags); 1287440fbc3aSDavid Howells } 1288440fbc3aSDavid Howells ret = 0; 1289440fbc3aSDavid Howells } else { 1290440fbc3aSDavid Howells clear_bit(AFS_VNODE_CB_PROMISED, &vnode->flags); 1291440fbc3aSDavid Howells 1292d2ddc776SDavid Howells if (test_bit(AFS_VNODE_DELETED, &vnode->flags)) 1293d2ddc776SDavid Howells kdebug("AFS_VNODE_DELETED"); 1294d2ddc776SDavid Howells 1295d2ddc776SDavid Howells ret = afs_validate(vnode, key); 1296d2ddc776SDavid Howells if (ret == -ESTALE) 1297d2ddc776SDavid Howells ret = 0; 1298440fbc3aSDavid Howells } 1299d2ddc776SDavid Howells _debug("nlink %d [val %d]", vnode->vfs_inode.i_nlink, ret); 1300d2ddc776SDavid Howells } 1301d2ddc776SDavid Howells 1302d2ddc776SDavid Howells return ret; 1303d2ddc776SDavid Howells } 1304d2ddc776SDavid Howells 1305d2ddc776SDavid Howells /* 1306d2ddc776SDavid Howells * Remove a file or symlink from an AFS filesystem. 1307d2ddc776SDavid Howells */ 1308d2ddc776SDavid Howells static int afs_unlink(struct inode *dir, struct dentry *dentry) 1309d2ddc776SDavid Howells { 1310d2ddc776SDavid Howells struct afs_fs_cursor fc; 1311d2ddc776SDavid Howells struct afs_vnode *dvnode = AFS_FS_I(dir), *vnode; 1312d2ddc776SDavid Howells struct key *key; 1313440fbc3aSDavid Howells unsigned long d_version = (unsigned long)dentry->d_fsdata; 1314d2ddc776SDavid Howells int ret; 1315d2ddc776SDavid Howells 1316d2ddc776SDavid Howells _enter("{%x:%u},{%pd}", 1317d2ddc776SDavid Howells dvnode->fid.vid, dvnode->fid.vnode, dentry); 1318d2ddc776SDavid Howells 1319d2ddc776SDavid Howells if (dentry->d_name.len >= AFSNAMEMAX) 1320d2ddc776SDavid Howells return -ENAMETOOLONG; 1321d2ddc776SDavid Howells 1322d2ddc776SDavid Howells key = afs_request_key(dvnode->volume->cell); 1323d2ddc776SDavid Howells if (IS_ERR(key)) { 1324d2ddc776SDavid Howells ret = PTR_ERR(key); 1325d2ddc776SDavid Howells goto error; 1326d2ddc776SDavid Howells } 1327d2ddc776SDavid Howells 1328d2ddc776SDavid Howells /* Try to make sure we have a callback promise on the victim. */ 1329d2ddc776SDavid Howells if (d_really_is_positive(dentry)) { 1330d2ddc776SDavid Howells vnode = AFS_FS_I(d_inode(dentry)); 1331d2ddc776SDavid Howells ret = afs_validate(vnode, key); 1332d2ddc776SDavid Howells if (ret < 0) 1333d2ddc776SDavid Howells goto error_key; 1334d2ddc776SDavid Howells } 1335d2ddc776SDavid Howells 1336d2ddc776SDavid Howells ret = -ERESTARTSYS; 1337d2ddc776SDavid Howells if (afs_begin_vnode_operation(&fc, dvnode, key)) { 1338d2ddc776SDavid Howells while (afs_select_fileserver(&fc)) { 1339d2ddc776SDavid Howells fc.cb_break = dvnode->cb_break + dvnode->cb_s_break; 1340d2ddc776SDavid Howells afs_fs_remove(&fc, dentry->d_name.name, false); 1341d2ddc776SDavid Howells } 1342d2ddc776SDavid Howells 1343d2ddc776SDavid Howells afs_vnode_commit_status(&fc, dvnode, fc.cb_break); 1344d2ddc776SDavid Howells ret = afs_end_vnode_operation(&fc); 1345d2ddc776SDavid Howells if (ret == 0) 1346440fbc3aSDavid Howells ret = afs_dir_remove_link( 1347440fbc3aSDavid Howells dentry, key, d_version, 1348440fbc3aSDavid Howells (unsigned long)dvnode->status.data_version); 1349d2ddc776SDavid Howells } 1350d2ddc776SDavid Howells 1351d2ddc776SDavid Howells error_key: 1352260a9803SDavid Howells key_put(key); 1353260a9803SDavid Howells error: 1354260a9803SDavid Howells _leave(" = %d", ret); 1355260a9803SDavid Howells return ret; 1356260a9803SDavid Howells } 1357260a9803SDavid Howells 1358260a9803SDavid Howells /* 1359260a9803SDavid Howells * create a regular file on an AFS filesystem 1360260a9803SDavid Howells */ 13614acdaf27SAl Viro static int afs_create(struct inode *dir, struct dentry *dentry, umode_t mode, 1362ebfc3b49SAl Viro bool excl) 1363260a9803SDavid Howells { 1364d2ddc776SDavid Howells struct afs_fs_cursor fc; 1365d2ddc776SDavid Howells struct afs_file_status newstatus; 1366d2ddc776SDavid Howells struct afs_callback newcb; 136743dd388bSColin Ian King struct afs_vnode *dvnode = AFS_FS_I(dir); 1368d2ddc776SDavid Howells struct afs_fid newfid; 1369260a9803SDavid Howells struct key *key; 1370260a9803SDavid Howells int ret; 1371260a9803SDavid Howells 1372d2ddc776SDavid Howells mode |= S_IFREG; 1373260a9803SDavid Howells 1374a455589fSAl Viro _enter("{%x:%u},{%pd},%ho,", 1375a455589fSAl Viro dvnode->fid.vid, dvnode->fid.vnode, dentry, mode); 1376260a9803SDavid Howells 1377d2ddc776SDavid Howells ret = -ENAMETOOLONG; 1378d2ddc776SDavid Howells if (dentry->d_name.len >= AFSNAMEMAX) 1379d2ddc776SDavid Howells goto error; 1380d2ddc776SDavid Howells 1381260a9803SDavid Howells key = afs_request_key(dvnode->volume->cell); 1382260a9803SDavid Howells if (IS_ERR(key)) { 1383260a9803SDavid Howells ret = PTR_ERR(key); 1384260a9803SDavid Howells goto error; 1385260a9803SDavid Howells } 1386260a9803SDavid Howells 1387d2ddc776SDavid Howells ret = -ERESTARTSYS; 1388d2ddc776SDavid Howells if (afs_begin_vnode_operation(&fc, dvnode, key)) { 1389d2ddc776SDavid Howells while (afs_select_fileserver(&fc)) { 1390d2ddc776SDavid Howells fc.cb_break = dvnode->cb_break + dvnode->cb_s_break; 1391d2ddc776SDavid Howells afs_fs_create(&fc, dentry->d_name.name, mode, 1392d2ddc776SDavid Howells &newfid, &newstatus, &newcb); 1393d2ddc776SDavid Howells } 1394d2ddc776SDavid Howells 1395d2ddc776SDavid Howells afs_check_for_remote_deletion(&fc, fc.vnode); 1396d2ddc776SDavid Howells afs_vnode_commit_status(&fc, dvnode, fc.cb_break); 1397d2ddc776SDavid Howells afs_vnode_new_inode(&fc, dentry, &newfid, &newstatus, &newcb); 1398d2ddc776SDavid Howells ret = afs_end_vnode_operation(&fc); 1399260a9803SDavid Howells if (ret < 0) 1400d2ddc776SDavid Howells goto error_key; 14014433b691SDavid Howells } else { 14024433b691SDavid Howells goto error_key; 1403260a9803SDavid Howells } 1404260a9803SDavid Howells 1405260a9803SDavid Howells key_put(key); 1406260a9803SDavid Howells _leave(" = 0"); 1407260a9803SDavid Howells return 0; 1408260a9803SDavid Howells 1409d2ddc776SDavid Howells error_key: 1410260a9803SDavid Howells key_put(key); 1411260a9803SDavid Howells error: 1412260a9803SDavid Howells d_drop(dentry); 1413260a9803SDavid Howells _leave(" = %d", ret); 1414260a9803SDavid Howells return ret; 1415260a9803SDavid Howells } 1416260a9803SDavid Howells 1417260a9803SDavid Howells /* 1418260a9803SDavid Howells * create a hard link between files in an AFS filesystem 1419260a9803SDavid Howells */ 1420260a9803SDavid Howells static int afs_link(struct dentry *from, struct inode *dir, 1421260a9803SDavid Howells struct dentry *dentry) 1422260a9803SDavid Howells { 1423d2ddc776SDavid Howells struct afs_fs_cursor fc; 1424260a9803SDavid Howells struct afs_vnode *dvnode, *vnode; 1425260a9803SDavid Howells struct key *key; 1426260a9803SDavid Howells int ret; 1427260a9803SDavid Howells 14282b0143b5SDavid Howells vnode = AFS_FS_I(d_inode(from)); 1429260a9803SDavid Howells dvnode = AFS_FS_I(dir); 1430260a9803SDavid Howells 1431a455589fSAl Viro _enter("{%x:%u},{%x:%u},{%pd}", 1432260a9803SDavid Howells vnode->fid.vid, vnode->fid.vnode, 1433260a9803SDavid Howells dvnode->fid.vid, dvnode->fid.vnode, 1434a455589fSAl Viro dentry); 1435260a9803SDavid Howells 1436d2ddc776SDavid Howells ret = -ENAMETOOLONG; 1437d2ddc776SDavid Howells if (dentry->d_name.len >= AFSNAMEMAX) 1438d2ddc776SDavid Howells goto error; 1439d2ddc776SDavid Howells 1440260a9803SDavid Howells key = afs_request_key(dvnode->volume->cell); 1441260a9803SDavid Howells if (IS_ERR(key)) { 1442260a9803SDavid Howells ret = PTR_ERR(key); 1443260a9803SDavid Howells goto error; 1444260a9803SDavid Howells } 1445260a9803SDavid Howells 1446d2ddc776SDavid Howells ret = -ERESTARTSYS; 1447d2ddc776SDavid Howells if (afs_begin_vnode_operation(&fc, dvnode, key)) { 1448d2ddc776SDavid Howells if (mutex_lock_interruptible_nested(&vnode->io_lock, 1) < 0) { 1449d2ddc776SDavid Howells afs_end_vnode_operation(&fc); 1450bc1527dcSDavid Howells goto error_key; 1451d2ddc776SDavid Howells } 1452260a9803SDavid Howells 1453d2ddc776SDavid Howells while (afs_select_fileserver(&fc)) { 1454d2ddc776SDavid Howells fc.cb_break = dvnode->cb_break + dvnode->cb_s_break; 1455d2ddc776SDavid Howells fc.cb_break_2 = vnode->cb_break + vnode->cb_s_break; 1456d2ddc776SDavid Howells afs_fs_link(&fc, vnode, dentry->d_name.name); 1457d2ddc776SDavid Howells } 1458d2ddc776SDavid Howells 1459d2ddc776SDavid Howells afs_vnode_commit_status(&fc, dvnode, fc.cb_break); 1460d2ddc776SDavid Howells afs_vnode_commit_status(&fc, vnode, fc.cb_break_2); 14617de9c6eeSAl Viro ihold(&vnode->vfs_inode); 1462260a9803SDavid Howells d_instantiate(dentry, &vnode->vfs_inode); 1463d2ddc776SDavid Howells 1464d2ddc776SDavid Howells mutex_unlock(&vnode->io_lock); 1465d2ddc776SDavid Howells ret = afs_end_vnode_operation(&fc); 1466d2ddc776SDavid Howells if (ret < 0) 1467d2ddc776SDavid Howells goto error_key; 14684433b691SDavid Howells } else { 14694433b691SDavid Howells goto error_key; 1470d2ddc776SDavid Howells } 1471d2ddc776SDavid Howells 1472260a9803SDavid Howells key_put(key); 1473260a9803SDavid Howells _leave(" = 0"); 1474260a9803SDavid Howells return 0; 1475260a9803SDavid Howells 1476d2ddc776SDavid Howells error_key: 1477260a9803SDavid Howells key_put(key); 1478260a9803SDavid Howells error: 1479260a9803SDavid Howells d_drop(dentry); 1480260a9803SDavid Howells _leave(" = %d", ret); 1481260a9803SDavid Howells return ret; 1482260a9803SDavid Howells } 1483260a9803SDavid Howells 1484260a9803SDavid Howells /* 1485260a9803SDavid Howells * create a symlink in an AFS filesystem 1486260a9803SDavid Howells */ 1487260a9803SDavid Howells static int afs_symlink(struct inode *dir, struct dentry *dentry, 1488260a9803SDavid Howells const char *content) 1489260a9803SDavid Howells { 1490d2ddc776SDavid Howells struct afs_fs_cursor fc; 1491d2ddc776SDavid Howells struct afs_file_status newstatus; 1492d2ddc776SDavid Howells struct afs_vnode *dvnode = AFS_FS_I(dir); 1493d2ddc776SDavid Howells struct afs_fid newfid; 1494260a9803SDavid Howells struct key *key; 1495260a9803SDavid Howells int ret; 1496260a9803SDavid Howells 1497a455589fSAl Viro _enter("{%x:%u},{%pd},%s", 1498a455589fSAl Viro dvnode->fid.vid, dvnode->fid.vnode, dentry, 1499260a9803SDavid Howells content); 1500260a9803SDavid Howells 1501d2ddc776SDavid Howells ret = -ENAMETOOLONG; 1502d2ddc776SDavid Howells if (dentry->d_name.len >= AFSNAMEMAX) 1503d2ddc776SDavid Howells goto error; 1504d2ddc776SDavid Howells 1505260a9803SDavid Howells ret = -EINVAL; 150645222b9eSDavid Howells if (strlen(content) >= AFSPATHMAX) 1507260a9803SDavid Howells goto error; 1508260a9803SDavid Howells 1509260a9803SDavid Howells key = afs_request_key(dvnode->volume->cell); 1510260a9803SDavid Howells if (IS_ERR(key)) { 1511260a9803SDavid Howells ret = PTR_ERR(key); 1512260a9803SDavid Howells goto error; 1513260a9803SDavid Howells } 1514260a9803SDavid Howells 1515d2ddc776SDavid Howells ret = -ERESTARTSYS; 1516d2ddc776SDavid Howells if (afs_begin_vnode_operation(&fc, dvnode, key)) { 1517d2ddc776SDavid Howells while (afs_select_fileserver(&fc)) { 1518d2ddc776SDavid Howells fc.cb_break = dvnode->cb_break + dvnode->cb_s_break; 1519d2ddc776SDavid Howells afs_fs_symlink(&fc, dentry->d_name.name, content, 1520d2ddc776SDavid Howells &newfid, &newstatus); 1521d2ddc776SDavid Howells } 1522d2ddc776SDavid Howells 1523d2ddc776SDavid Howells afs_check_for_remote_deletion(&fc, fc.vnode); 1524d2ddc776SDavid Howells afs_vnode_commit_status(&fc, dvnode, fc.cb_break); 1525d2ddc776SDavid Howells afs_vnode_new_inode(&fc, dentry, &newfid, &newstatus, NULL); 1526d2ddc776SDavid Howells ret = afs_end_vnode_operation(&fc); 1527260a9803SDavid Howells if (ret < 0) 1528d2ddc776SDavid Howells goto error_key; 15294433b691SDavid Howells } else { 15304433b691SDavid Howells goto error_key; 1531260a9803SDavid Howells } 1532260a9803SDavid Howells 1533260a9803SDavid Howells key_put(key); 1534260a9803SDavid Howells _leave(" = 0"); 1535260a9803SDavid Howells return 0; 1536260a9803SDavid Howells 1537d2ddc776SDavid Howells error_key: 1538260a9803SDavid Howells key_put(key); 1539260a9803SDavid Howells error: 1540260a9803SDavid Howells d_drop(dentry); 1541260a9803SDavid Howells _leave(" = %d", ret); 1542260a9803SDavid Howells return ret; 1543260a9803SDavid Howells } 1544260a9803SDavid Howells 1545260a9803SDavid Howells /* 1546260a9803SDavid Howells * rename a file in an AFS filesystem and/or move it between directories 1547260a9803SDavid Howells */ 1548260a9803SDavid Howells static int afs_rename(struct inode *old_dir, struct dentry *old_dentry, 15491cd66c93SMiklos Szeredi struct inode *new_dir, struct dentry *new_dentry, 15501cd66c93SMiklos Szeredi unsigned int flags) 1551260a9803SDavid Howells { 1552d2ddc776SDavid Howells struct afs_fs_cursor fc; 1553260a9803SDavid Howells struct afs_vnode *orig_dvnode, *new_dvnode, *vnode; 1554260a9803SDavid Howells struct key *key; 1555260a9803SDavid Howells int ret; 1556260a9803SDavid Howells 15571cd66c93SMiklos Szeredi if (flags) 15581cd66c93SMiklos Szeredi return -EINVAL; 15591cd66c93SMiklos Szeredi 15602b0143b5SDavid Howells vnode = AFS_FS_I(d_inode(old_dentry)); 1561260a9803SDavid Howells orig_dvnode = AFS_FS_I(old_dir); 1562260a9803SDavid Howells new_dvnode = AFS_FS_I(new_dir); 1563260a9803SDavid Howells 1564a455589fSAl Viro _enter("{%x:%u},{%x:%u},{%x:%u},{%pd}", 1565260a9803SDavid Howells orig_dvnode->fid.vid, orig_dvnode->fid.vnode, 1566260a9803SDavid Howells vnode->fid.vid, vnode->fid.vnode, 1567260a9803SDavid Howells new_dvnode->fid.vid, new_dvnode->fid.vnode, 1568a455589fSAl Viro new_dentry); 1569260a9803SDavid Howells 1570260a9803SDavid Howells key = afs_request_key(orig_dvnode->volume->cell); 1571260a9803SDavid Howells if (IS_ERR(key)) { 1572260a9803SDavid Howells ret = PTR_ERR(key); 1573260a9803SDavid Howells goto error; 1574260a9803SDavid Howells } 1575260a9803SDavid Howells 1576d2ddc776SDavid Howells ret = -ERESTARTSYS; 1577d2ddc776SDavid Howells if (afs_begin_vnode_operation(&fc, orig_dvnode, key)) { 1578d2ddc776SDavid Howells if (orig_dvnode != new_dvnode) { 1579d2ddc776SDavid Howells if (mutex_lock_interruptible_nested(&new_dvnode->io_lock, 1) < 0) { 1580d2ddc776SDavid Howells afs_end_vnode_operation(&fc); 1581bc1527dcSDavid Howells goto error_key; 1582d2ddc776SDavid Howells } 1583d2ddc776SDavid Howells } 1584d2ddc776SDavid Howells while (afs_select_fileserver(&fc)) { 1585d2ddc776SDavid Howells fc.cb_break = orig_dvnode->cb_break + orig_dvnode->cb_s_break; 1586d2ddc776SDavid Howells fc.cb_break_2 = new_dvnode->cb_break + new_dvnode->cb_s_break; 1587d2ddc776SDavid Howells afs_fs_rename(&fc, old_dentry->d_name.name, 1588d2ddc776SDavid Howells new_dvnode, new_dentry->d_name.name); 1589d2ddc776SDavid Howells } 1590d2ddc776SDavid Howells 1591d2ddc776SDavid Howells afs_vnode_commit_status(&fc, orig_dvnode, fc.cb_break); 1592d2ddc776SDavid Howells afs_vnode_commit_status(&fc, new_dvnode, fc.cb_break_2); 1593d2ddc776SDavid Howells if (orig_dvnode != new_dvnode) 1594d2ddc776SDavid Howells mutex_unlock(&new_dvnode->io_lock); 1595d2ddc776SDavid Howells ret = afs_end_vnode_operation(&fc); 1596260a9803SDavid Howells if (ret < 0) 1597d2ddc776SDavid Howells goto error_key; 1598d2ddc776SDavid Howells } 1599d2ddc776SDavid Howells 1600d2ddc776SDavid Howells error_key: 1601260a9803SDavid Howells key_put(key); 1602260a9803SDavid Howells error: 1603260a9803SDavid Howells _leave(" = %d", ret); 1604260a9803SDavid Howells return ret; 1605260a9803SDavid Howells } 1606