11da177e4SLinus Torvalds /* dir.c: AFS filesystem directory handling 21da177e4SLinus Torvalds * 3f3ddee8dSDavid Howells * Copyright (C) 2002, 2018 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/fs.h> 1434286d66SNick Piggin #include <linux/namei.h> 151da177e4SLinus Torvalds #include <linux/pagemap.h> 16f3ddee8dSDavid Howells #include <linux/swap.h> 1700d3b7a4SDavid Howells #include <linux/ctype.h> 18e8edc6e0SAlexey Dobriyan #include <linux/sched.h> 19f3ddee8dSDavid Howells #include <linux/task_io_accounting_ops.h> 201da177e4SLinus Torvalds #include "internal.h" 214ea219a8SDavid Howells #include "xdr_fs.h" 221da177e4SLinus Torvalds 23260a9803SDavid Howells static struct dentry *afs_lookup(struct inode *dir, struct dentry *dentry, 2400cd8dd3SAl Viro unsigned int flags); 251da177e4SLinus Torvalds static int afs_dir_open(struct inode *inode, struct file *file); 261bbae9f8SAl Viro static int afs_readdir(struct file *file, struct dir_context *ctx); 270b728e19SAl Viro static int afs_d_revalidate(struct dentry *dentry, unsigned int flags); 28fe15ce44SNick Piggin static int afs_d_delete(const struct dentry *dentry); 295cf9dd55SDavid Howells static int afs_lookup_one_filldir(struct dir_context *ctx, const char *name, int nlen, 305cf9dd55SDavid Howells loff_t fpos, u64 ino, unsigned dtype); 31ac7576f4SMiklos Szeredi static int afs_lookup_filldir(struct dir_context *ctx, const char *name, int nlen, 32afefdbb2SDavid Howells loff_t fpos, u64 ino, unsigned dtype); 334acdaf27SAl Viro static int afs_create(struct inode *dir, struct dentry *dentry, umode_t mode, 34ebfc3b49SAl Viro bool excl); 3518bb1db3SAl Viro static int afs_mkdir(struct inode *dir, struct dentry *dentry, umode_t mode); 36260a9803SDavid Howells static int afs_rmdir(struct inode *dir, struct dentry *dentry); 37260a9803SDavid Howells static int afs_unlink(struct inode *dir, struct dentry *dentry); 38260a9803SDavid Howells static int afs_link(struct dentry *from, struct inode *dir, 39260a9803SDavid Howells struct dentry *dentry); 40260a9803SDavid Howells static int afs_symlink(struct inode *dir, struct dentry *dentry, 41260a9803SDavid Howells const char *content); 42260a9803SDavid Howells static int afs_rename(struct inode *old_dir, struct dentry *old_dentry, 431cd66c93SMiklos Szeredi struct inode *new_dir, struct dentry *new_dentry, 441cd66c93SMiklos Szeredi unsigned int flags); 45f3ddee8dSDavid Howells static int afs_dir_releasepage(struct page *page, gfp_t gfp_flags); 46f3ddee8dSDavid Howells static void afs_dir_invalidatepage(struct page *page, unsigned int offset, 47f3ddee8dSDavid Howells unsigned int length); 48f3ddee8dSDavid Howells 49f3ddee8dSDavid Howells static int afs_dir_set_page_dirty(struct page *page) 50f3ddee8dSDavid Howells { 51f3ddee8dSDavid Howells BUG(); /* This should never happen. */ 52f3ddee8dSDavid Howells } 531da177e4SLinus Torvalds 544b6f5d20SArjan van de Ven const struct file_operations afs_dir_file_operations = { 551da177e4SLinus Torvalds .open = afs_dir_open, 5600d3b7a4SDavid Howells .release = afs_release, 5729884effSAl Viro .iterate_shared = afs_readdir, 58e8d6c554SDavid Howells .lock = afs_lock, 593222a3e5SChristoph Hellwig .llseek = generic_file_llseek, 601da177e4SLinus Torvalds }; 611da177e4SLinus Torvalds 62754661f1SArjan van de Ven const struct inode_operations afs_dir_inode_operations = { 63260a9803SDavid Howells .create = afs_create, 64260a9803SDavid Howells .lookup = afs_lookup, 65260a9803SDavid Howells .link = afs_link, 66260a9803SDavid Howells .unlink = afs_unlink, 67260a9803SDavid Howells .symlink = afs_symlink, 68260a9803SDavid Howells .mkdir = afs_mkdir, 69260a9803SDavid Howells .rmdir = afs_rmdir, 702773bf00SMiklos Szeredi .rename = afs_rename, 7100d3b7a4SDavid Howells .permission = afs_permission, 72416351f2SDavid Howells .getattr = afs_getattr, 7331143d5dSDavid Howells .setattr = afs_setattr, 74d3e3b7eaSDavid Howells .listxattr = afs_listxattr, 751da177e4SLinus Torvalds }; 761da177e4SLinus Torvalds 77f3ddee8dSDavid Howells const struct address_space_operations afs_dir_aops = { 78f3ddee8dSDavid Howells .set_page_dirty = afs_dir_set_page_dirty, 79f3ddee8dSDavid Howells .releasepage = afs_dir_releasepage, 80f3ddee8dSDavid Howells .invalidatepage = afs_dir_invalidatepage, 81f3ddee8dSDavid Howells }; 82f3ddee8dSDavid 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 905cf9dd55SDavid Howells struct afs_lookup_one_cookie { 915cf9dd55SDavid Howells struct dir_context ctx; 925cf9dd55SDavid Howells struct qstr name; 935cf9dd55SDavid Howells bool found; 945cf9dd55SDavid Howells struct afs_fid fid; 955cf9dd55SDavid Howells }; 965cf9dd55SDavid Howells 97260a9803SDavid Howells struct afs_lookup_cookie { 981bbae9f8SAl Viro struct dir_context ctx; 991bbae9f8SAl Viro struct qstr name; 1005cf9dd55SDavid Howells bool found; 1015cf9dd55SDavid Howells bool one_only; 1025cf9dd55SDavid Howells unsigned short nr_fids; 1035cf9dd55SDavid Howells struct afs_file_status *statuses; 1045cf9dd55SDavid Howells struct afs_callback *callbacks; 1055cf9dd55SDavid Howells struct afs_fid fids[50]; 1061da177e4SLinus Torvalds }; 1071da177e4SLinus Torvalds 1081da177e4SLinus Torvalds /* 1091da177e4SLinus Torvalds * check that a directory page is valid 1101da177e4SLinus Torvalds */ 111f3ddee8dSDavid Howells static bool afs_dir_check_page(struct afs_vnode *dvnode, struct page *page, 112f3ddee8dSDavid Howells loff_t i_size) 1131da177e4SLinus Torvalds { 11400317636SDavid Howells struct afs_xdr_dir_page *dbuf; 115f3ddee8dSDavid Howells loff_t latter, off; 1161da177e4SLinus Torvalds int tmp, qty; 1171da177e4SLinus Torvalds 118dab17c1aSDavid Howells /* Determine how many magic numbers there should be in this page, but 119dab17c1aSDavid Howells * we must take care because the directory may change size under us. 120dab17c1aSDavid Howells */ 121dab17c1aSDavid Howells off = page_offset(page); 122dab17c1aSDavid Howells if (i_size <= off) 123dab17c1aSDavid Howells goto checked; 124dab17c1aSDavid Howells 125dab17c1aSDavid Howells latter = i_size - off; 1261da177e4SLinus Torvalds if (latter >= PAGE_SIZE) 1271da177e4SLinus Torvalds qty = PAGE_SIZE; 1281da177e4SLinus Torvalds else 1291da177e4SLinus Torvalds qty = latter; 13000317636SDavid Howells qty /= sizeof(union afs_xdr_dir_block); 1311da177e4SLinus Torvalds 1321da177e4SLinus Torvalds /* check them */ 1331da177e4SLinus Torvalds dbuf = page_address(page); 1341da177e4SLinus Torvalds for (tmp = 0; tmp < qty; tmp++) { 13500317636SDavid Howells if (dbuf->blocks[tmp].hdr.magic != AFS_DIR_MAGIC) { 136dab17c1aSDavid Howells printk("kAFS: %s(%lx): bad magic %d/%d is %04hx\n", 137f3ddee8dSDavid Howells __func__, dvnode->vfs_inode.i_ino, tmp, qty, 13800317636SDavid Howells ntohs(dbuf->blocks[tmp].hdr.magic)); 139f3ddee8dSDavid Howells trace_afs_dir_check_failed(dvnode, off, i_size); 1401da177e4SLinus Torvalds goto error; 1411da177e4SLinus Torvalds } 1421da177e4SLinus Torvalds } 1431da177e4SLinus Torvalds 144dab17c1aSDavid Howells checked: 145f3ddee8dSDavid Howells afs_stat_v(dvnode, n_read_dir); 146be5b82dbSAl Viro return true; 1471da177e4SLinus Torvalds 1481da177e4SLinus Torvalds error: 149be5b82dbSAl Viro return false; 150ec26815aSDavid Howells } 1511da177e4SLinus Torvalds 1521da177e4SLinus Torvalds /* 1531da177e4SLinus Torvalds * open an AFS directory file 1541da177e4SLinus Torvalds */ 1551da177e4SLinus Torvalds static int afs_dir_open(struct inode *inode, struct file *file) 1561da177e4SLinus Torvalds { 1571da177e4SLinus Torvalds _enter("{%lu}", inode->i_ino); 1581da177e4SLinus Torvalds 15900317636SDavid Howells BUILD_BUG_ON(sizeof(union afs_xdr_dir_block) != 2048); 16000317636SDavid Howells BUILD_BUG_ON(sizeof(union afs_xdr_dirent) != 32); 1611da177e4SLinus Torvalds 16208e0e7c8SDavid Howells if (test_bit(AFS_VNODE_DELETED, &AFS_FS_I(inode)->flags)) 1631da177e4SLinus Torvalds return -ENOENT; 1641da177e4SLinus Torvalds 16500d3b7a4SDavid Howells return afs_open(inode, file); 166ec26815aSDavid Howells } 1671da177e4SLinus Torvalds 1681da177e4SLinus Torvalds /* 169f3ddee8dSDavid Howells * Read the directory into the pagecache in one go, scrubbing the previous 170f3ddee8dSDavid Howells * contents. The list of pages is returned, pinning them so that they don't 171f3ddee8dSDavid Howells * get reclaimed during the iteration. 172f3ddee8dSDavid Howells */ 173f3ddee8dSDavid Howells static struct afs_read *afs_read_dir(struct afs_vnode *dvnode, struct key *key) 174f3ddee8dSDavid Howells { 175f3ddee8dSDavid Howells struct afs_read *req; 176f3ddee8dSDavid Howells loff_t i_size; 177f3ddee8dSDavid Howells int nr_pages, nr_inline, i, n; 178f3ddee8dSDavid Howells int ret = -ENOMEM; 179f3ddee8dSDavid Howells 180f3ddee8dSDavid Howells retry: 181f3ddee8dSDavid Howells i_size = i_size_read(&dvnode->vfs_inode); 182f3ddee8dSDavid Howells if (i_size < 2048) 183f3ddee8dSDavid Howells return ERR_PTR(-EIO); 184f3ddee8dSDavid Howells if (i_size > 2048 * 1024) 185f3ddee8dSDavid Howells return ERR_PTR(-EFBIG); 186f3ddee8dSDavid Howells 187f3ddee8dSDavid Howells _enter("%llu", i_size); 188f3ddee8dSDavid Howells 189f3ddee8dSDavid Howells /* Get a request record to hold the page list. We want to hold it 190f3ddee8dSDavid Howells * inline if we can, but we don't want to make an order 1 allocation. 191f3ddee8dSDavid Howells */ 192f3ddee8dSDavid Howells nr_pages = (i_size + PAGE_SIZE - 1) / PAGE_SIZE; 193f3ddee8dSDavid Howells nr_inline = nr_pages; 194f3ddee8dSDavid Howells if (nr_inline > (PAGE_SIZE - sizeof(*req)) / sizeof(struct page *)) 195f3ddee8dSDavid Howells nr_inline = 0; 196f3ddee8dSDavid Howells 197f3ddee8dSDavid Howells req = kzalloc(sizeof(*req) + sizeof(struct page *) * nr_inline, 198f3ddee8dSDavid Howells GFP_KERNEL); 199f3ddee8dSDavid Howells if (!req) 200f3ddee8dSDavid Howells return ERR_PTR(-ENOMEM); 201f3ddee8dSDavid Howells 202f3ddee8dSDavid Howells refcount_set(&req->usage, 1); 203f3ddee8dSDavid Howells req->nr_pages = nr_pages; 204f3ddee8dSDavid Howells req->actual_len = i_size; /* May change */ 205f3ddee8dSDavid Howells req->len = nr_pages * PAGE_SIZE; /* We can ask for more than there is */ 206f3ddee8dSDavid Howells req->data_version = dvnode->status.data_version; /* May change */ 207f3ddee8dSDavid Howells if (nr_inline > 0) { 208f3ddee8dSDavid Howells req->pages = req->array; 209f3ddee8dSDavid Howells } else { 210f3ddee8dSDavid Howells req->pages = kcalloc(nr_pages, sizeof(struct page *), 211f3ddee8dSDavid Howells GFP_KERNEL); 212f3ddee8dSDavid Howells if (!req->pages) 213f3ddee8dSDavid Howells goto error; 214f3ddee8dSDavid Howells } 215f3ddee8dSDavid Howells 216f3ddee8dSDavid Howells /* Get a list of all the pages that hold or will hold the directory 217f3ddee8dSDavid Howells * content. We need to fill in any gaps that we might find where the 218f3ddee8dSDavid Howells * memory reclaimer has been at work. If there are any gaps, we will 219f3ddee8dSDavid Howells * need to reread the entire directory contents. 220f3ddee8dSDavid Howells */ 221f3ddee8dSDavid Howells i = 0; 222f3ddee8dSDavid Howells do { 223f3ddee8dSDavid Howells n = find_get_pages_contig(dvnode->vfs_inode.i_mapping, i, 224f3ddee8dSDavid Howells req->nr_pages - i, 225f3ddee8dSDavid Howells req->pages + i); 226f3ddee8dSDavid Howells _debug("find %u at %u/%u", n, i, req->nr_pages); 227f3ddee8dSDavid Howells if (n == 0) { 228f3ddee8dSDavid Howells gfp_t gfp = dvnode->vfs_inode.i_mapping->gfp_mask; 229f3ddee8dSDavid Howells 230f3ddee8dSDavid Howells if (test_and_clear_bit(AFS_VNODE_DIR_VALID, &dvnode->flags)) 231f3ddee8dSDavid Howells afs_stat_v(dvnode, n_inval); 232f3ddee8dSDavid Howells 233f3ddee8dSDavid Howells ret = -ENOMEM; 234f3ddee8dSDavid Howells req->pages[i] = __page_cache_alloc(gfp); 235f3ddee8dSDavid Howells if (!req->pages[i]) 236f3ddee8dSDavid Howells goto error; 237f3ddee8dSDavid Howells ret = add_to_page_cache_lru(req->pages[i], 238f3ddee8dSDavid Howells dvnode->vfs_inode.i_mapping, 239f3ddee8dSDavid Howells i, gfp); 240f3ddee8dSDavid Howells if (ret < 0) 241f3ddee8dSDavid Howells goto error; 242f3ddee8dSDavid Howells 243f3ddee8dSDavid Howells set_page_private(req->pages[i], 1); 244f3ddee8dSDavid Howells SetPagePrivate(req->pages[i]); 245f3ddee8dSDavid Howells unlock_page(req->pages[i]); 246f3ddee8dSDavid Howells i++; 247f3ddee8dSDavid Howells } else { 248f3ddee8dSDavid Howells i += n; 249f3ddee8dSDavid Howells } 250f3ddee8dSDavid Howells } while (i < req->nr_pages); 251f3ddee8dSDavid Howells 252f3ddee8dSDavid Howells /* If we're going to reload, we need to lock all the pages to prevent 253f3ddee8dSDavid Howells * races. 254f3ddee8dSDavid Howells */ 255f3ddee8dSDavid Howells if (!test_bit(AFS_VNODE_DIR_VALID, &dvnode->flags)) { 256f3ddee8dSDavid Howells ret = -ERESTARTSYS; 257f3ddee8dSDavid Howells for (i = 0; i < req->nr_pages; i++) 258f3ddee8dSDavid Howells if (lock_page_killable(req->pages[i]) < 0) 259f3ddee8dSDavid Howells goto error_unlock; 260f3ddee8dSDavid Howells 261f3ddee8dSDavid Howells if (test_bit(AFS_VNODE_DIR_VALID, &dvnode->flags)) 262f3ddee8dSDavid Howells goto success; 263f3ddee8dSDavid Howells 264f3ddee8dSDavid Howells ret = afs_fetch_data(dvnode, key, req); 265f3ddee8dSDavid Howells if (ret < 0) 266f3ddee8dSDavid Howells goto error_unlock_all; 267f3ddee8dSDavid Howells 268f3ddee8dSDavid Howells task_io_account_read(PAGE_SIZE * req->nr_pages); 269f3ddee8dSDavid Howells 270f3ddee8dSDavid Howells if (req->len < req->file_size) 271f3ddee8dSDavid Howells goto content_has_grown; 272f3ddee8dSDavid Howells 273f3ddee8dSDavid Howells /* Validate the data we just read. */ 274f3ddee8dSDavid Howells ret = -EIO; 275f3ddee8dSDavid Howells for (i = 0; i < req->nr_pages; i++) 276f3ddee8dSDavid Howells if (!afs_dir_check_page(dvnode, req->pages[i], 277f3ddee8dSDavid Howells req->actual_len)) 278f3ddee8dSDavid Howells goto error_unlock_all; 279f3ddee8dSDavid Howells 280f3ddee8dSDavid Howells // TODO: Trim excess pages 281f3ddee8dSDavid Howells 282f3ddee8dSDavid Howells set_bit(AFS_VNODE_DIR_VALID, &dvnode->flags); 283f3ddee8dSDavid Howells } 284f3ddee8dSDavid Howells 285f3ddee8dSDavid Howells success: 286f3ddee8dSDavid Howells i = req->nr_pages; 287f3ddee8dSDavid Howells while (i > 0) 288f3ddee8dSDavid Howells unlock_page(req->pages[--i]); 289f3ddee8dSDavid Howells return req; 290f3ddee8dSDavid Howells 291f3ddee8dSDavid Howells error_unlock_all: 292f3ddee8dSDavid Howells i = req->nr_pages; 293f3ddee8dSDavid Howells error_unlock: 294f3ddee8dSDavid Howells while (i > 0) 295f3ddee8dSDavid Howells unlock_page(req->pages[--i]); 296f3ddee8dSDavid Howells error: 297f3ddee8dSDavid Howells afs_put_read(req); 298f3ddee8dSDavid Howells _leave(" = %d", ret); 299f3ddee8dSDavid Howells return ERR_PTR(ret); 300f3ddee8dSDavid Howells 301f3ddee8dSDavid Howells content_has_grown: 302f3ddee8dSDavid Howells i = req->nr_pages; 303f3ddee8dSDavid Howells while (i > 0) 304f3ddee8dSDavid Howells unlock_page(req->pages[--i]); 305f3ddee8dSDavid Howells afs_put_read(req); 306f3ddee8dSDavid Howells goto retry; 307f3ddee8dSDavid Howells } 308f3ddee8dSDavid Howells 309f3ddee8dSDavid Howells /* 3101da177e4SLinus Torvalds * deal with one block in an AFS directory 3111da177e4SLinus Torvalds */ 3121bbae9f8SAl Viro static int afs_dir_iterate_block(struct dir_context *ctx, 31300317636SDavid Howells union afs_xdr_dir_block *block, 3141bbae9f8SAl Viro unsigned blkoff) 3151da177e4SLinus Torvalds { 31600317636SDavid Howells union afs_xdr_dirent *dire; 3171da177e4SLinus Torvalds unsigned offset, next, curr; 3181da177e4SLinus Torvalds size_t nlen; 3191bbae9f8SAl Viro int tmp; 3201da177e4SLinus Torvalds 3211bbae9f8SAl Viro _enter("%u,%x,%p,,",(unsigned)ctx->pos,blkoff,block); 3221da177e4SLinus Torvalds 32300317636SDavid Howells curr = (ctx->pos - blkoff) / sizeof(union afs_xdr_dirent); 3241da177e4SLinus Torvalds 3251da177e4SLinus Torvalds /* walk through the block, an entry at a time */ 3264ea219a8SDavid Howells for (offset = (blkoff == 0 ? AFS_DIR_RESV_BLOCKS0 : AFS_DIR_RESV_BLOCKS); 3274ea219a8SDavid Howells offset < AFS_DIR_SLOTS_PER_BLOCK; 3281da177e4SLinus Torvalds offset = next 3291da177e4SLinus Torvalds ) { 3301da177e4SLinus Torvalds next = offset + 1; 3311da177e4SLinus Torvalds 3321da177e4SLinus Torvalds /* skip entries marked unused in the bitmap */ 33300317636SDavid Howells if (!(block->hdr.bitmap[offset / 8] & 3341da177e4SLinus Torvalds (1 << (offset % 8)))) { 3355b5e0928SAlexey Dobriyan _debug("ENT[%zu.%u]: unused", 33600317636SDavid Howells blkoff / sizeof(union afs_xdr_dir_block), offset); 3371da177e4SLinus Torvalds if (offset >= curr) 3381bbae9f8SAl Viro ctx->pos = blkoff + 33900317636SDavid Howells next * sizeof(union afs_xdr_dirent); 3401da177e4SLinus Torvalds continue; 3411da177e4SLinus Torvalds } 3421da177e4SLinus Torvalds 3431da177e4SLinus Torvalds /* got a valid entry */ 3441da177e4SLinus Torvalds dire = &block->dirents[offset]; 3451da177e4SLinus Torvalds nlen = strnlen(dire->u.name, 3461da177e4SLinus Torvalds sizeof(*block) - 34700317636SDavid Howells offset * sizeof(union afs_xdr_dirent)); 3481da177e4SLinus Torvalds 3495b5e0928SAlexey Dobriyan _debug("ENT[%zu.%u]: %s %zu \"%s\"", 35000317636SDavid Howells blkoff / sizeof(union afs_xdr_dir_block), offset, 3511da177e4SLinus Torvalds (offset < curr ? "skip" : "fill"), 3521da177e4SLinus Torvalds nlen, dire->u.name); 3531da177e4SLinus Torvalds 3541da177e4SLinus Torvalds /* work out where the next possible entry is */ 35500317636SDavid Howells for (tmp = nlen; tmp > 15; tmp -= sizeof(union afs_xdr_dirent)) { 3564ea219a8SDavid Howells if (next >= AFS_DIR_SLOTS_PER_BLOCK) { 3575b5e0928SAlexey Dobriyan _debug("ENT[%zu.%u]:" 3581da177e4SLinus Torvalds " %u travelled beyond end dir block" 3595b5e0928SAlexey Dobriyan " (len %u/%zu)", 36000317636SDavid Howells blkoff / sizeof(union afs_xdr_dir_block), 3611da177e4SLinus Torvalds offset, next, tmp, nlen); 3621da177e4SLinus Torvalds return -EIO; 3631da177e4SLinus Torvalds } 36400317636SDavid Howells if (!(block->hdr.bitmap[next / 8] & 3651da177e4SLinus Torvalds (1 << (next % 8)))) { 3665b5e0928SAlexey Dobriyan _debug("ENT[%zu.%u]:" 3675b5e0928SAlexey Dobriyan " %u unmarked extension (len %u/%zu)", 36800317636SDavid Howells blkoff / sizeof(union afs_xdr_dir_block), 3691da177e4SLinus Torvalds offset, next, tmp, nlen); 3701da177e4SLinus Torvalds return -EIO; 3711da177e4SLinus Torvalds } 3721da177e4SLinus Torvalds 3735b5e0928SAlexey Dobriyan _debug("ENT[%zu.%u]: ext %u/%zu", 37400317636SDavid Howells blkoff / sizeof(union afs_xdr_dir_block), 3751da177e4SLinus Torvalds next, tmp, nlen); 3761da177e4SLinus Torvalds next++; 3771da177e4SLinus Torvalds } 3781da177e4SLinus Torvalds 3791da177e4SLinus Torvalds /* skip if starts before the current position */ 3801da177e4SLinus Torvalds if (offset < curr) 3811da177e4SLinus Torvalds continue; 3821da177e4SLinus Torvalds 3831da177e4SLinus Torvalds /* found the next entry */ 3841bbae9f8SAl Viro if (!dir_emit(ctx, dire->u.name, nlen, 3851da177e4SLinus Torvalds ntohl(dire->u.vnode), 3865cf9dd55SDavid Howells (ctx->actor == afs_lookup_filldir || 3875cf9dd55SDavid Howells ctx->actor == afs_lookup_one_filldir)? 3881bbae9f8SAl Viro ntohl(dire->u.unique) : DT_UNKNOWN)) { 3891da177e4SLinus Torvalds _leave(" = 0 [full]"); 3901da177e4SLinus Torvalds return 0; 3911da177e4SLinus Torvalds } 3921da177e4SLinus Torvalds 39300317636SDavid Howells ctx->pos = blkoff + next * sizeof(union afs_xdr_dirent); 3941da177e4SLinus Torvalds } 3951da177e4SLinus Torvalds 3961da177e4SLinus Torvalds _leave(" = 1 [more]"); 3971da177e4SLinus Torvalds return 1; 398ec26815aSDavid Howells } 3991da177e4SLinus Torvalds 4001da177e4SLinus Torvalds /* 40108e0e7c8SDavid Howells * iterate through the data blob that lists the contents of an AFS directory 4021da177e4SLinus Torvalds */ 4031bbae9f8SAl Viro static int afs_dir_iterate(struct inode *dir, struct dir_context *ctx, 4041bbae9f8SAl Viro struct key *key) 4051da177e4SLinus Torvalds { 406f3ddee8dSDavid Howells struct afs_vnode *dvnode = AFS_FS_I(dir); 40700317636SDavid Howells struct afs_xdr_dir_page *dbuf; 40800317636SDavid Howells union afs_xdr_dir_block *dblock; 409f3ddee8dSDavid Howells struct afs_read *req; 4101da177e4SLinus Torvalds struct page *page; 4111da177e4SLinus Torvalds unsigned blkoff, limit; 4121da177e4SLinus Torvalds int ret; 4131da177e4SLinus Torvalds 4141bbae9f8SAl Viro _enter("{%lu},%u,,", dir->i_ino, (unsigned)ctx->pos); 4151da177e4SLinus Torvalds 41608e0e7c8SDavid Howells if (test_bit(AFS_VNODE_DELETED, &AFS_FS_I(dir)->flags)) { 4171da177e4SLinus Torvalds _leave(" = -ESTALE"); 4181da177e4SLinus Torvalds return -ESTALE; 4191da177e4SLinus Torvalds } 4201da177e4SLinus Torvalds 421f3ddee8dSDavid Howells req = afs_read_dir(dvnode, key); 422f3ddee8dSDavid Howells if (IS_ERR(req)) 423f3ddee8dSDavid Howells return PTR_ERR(req); 424f3ddee8dSDavid Howells 4251da177e4SLinus Torvalds /* round the file position up to the next entry boundary */ 42600317636SDavid Howells ctx->pos += sizeof(union afs_xdr_dirent) - 1; 42700317636SDavid Howells ctx->pos &= ~(sizeof(union afs_xdr_dirent) - 1); 4281da177e4SLinus Torvalds 4291da177e4SLinus Torvalds /* walk through the blocks in sequence */ 4301da177e4SLinus Torvalds ret = 0; 431f3ddee8dSDavid Howells while (ctx->pos < req->actual_len) { 43200317636SDavid Howells blkoff = ctx->pos & ~(sizeof(union afs_xdr_dir_block) - 1); 4331da177e4SLinus Torvalds 434f3ddee8dSDavid Howells /* Fetch the appropriate page from the directory and re-add it 435f3ddee8dSDavid Howells * to the LRU. 436f3ddee8dSDavid Howells */ 437f3ddee8dSDavid Howells page = req->pages[blkoff / PAGE_SIZE]; 438f3ddee8dSDavid Howells if (!page) { 439f3ddee8dSDavid Howells ret = -EIO; 4401da177e4SLinus Torvalds break; 4411da177e4SLinus Torvalds } 442f3ddee8dSDavid Howells mark_page_accessed(page); 4431da177e4SLinus Torvalds 4441da177e4SLinus Torvalds limit = blkoff & ~(PAGE_SIZE - 1); 4451da177e4SLinus Torvalds 446f3ddee8dSDavid Howells dbuf = kmap(page); 4471da177e4SLinus Torvalds 4481da177e4SLinus Torvalds /* deal with the individual blocks stashed on this page */ 4491da177e4SLinus Torvalds do { 4501da177e4SLinus Torvalds dblock = &dbuf->blocks[(blkoff % PAGE_SIZE) / 45100317636SDavid Howells sizeof(union afs_xdr_dir_block)]; 4521bbae9f8SAl Viro ret = afs_dir_iterate_block(ctx, dblock, blkoff); 4531da177e4SLinus Torvalds if (ret != 1) { 454f3ddee8dSDavid Howells kunmap(page); 4551da177e4SLinus Torvalds goto out; 4561da177e4SLinus Torvalds } 4571da177e4SLinus Torvalds 45800317636SDavid Howells blkoff += sizeof(union afs_xdr_dir_block); 4591da177e4SLinus Torvalds 4601bbae9f8SAl Viro } while (ctx->pos < dir->i_size && blkoff < limit); 4611da177e4SLinus Torvalds 462f3ddee8dSDavid Howells kunmap(page); 4631da177e4SLinus Torvalds ret = 0; 4641da177e4SLinus Torvalds } 4651da177e4SLinus Torvalds 4661da177e4SLinus Torvalds out: 467f3ddee8dSDavid Howells afs_put_read(req); 4681da177e4SLinus Torvalds _leave(" = %d", ret); 4691da177e4SLinus Torvalds return ret; 470ec26815aSDavid Howells } 4711da177e4SLinus Torvalds 4721da177e4SLinus Torvalds /* 4731da177e4SLinus Torvalds * read an AFS directory 4741da177e4SLinus Torvalds */ 4751bbae9f8SAl Viro static int afs_readdir(struct file *file, struct dir_context *ctx) 4761da177e4SLinus Torvalds { 477215804a9SDavid Howells return afs_dir_iterate(file_inode(file), ctx, afs_file_key(file)); 478ec26815aSDavid Howells } 4791da177e4SLinus Torvalds 4801da177e4SLinus Torvalds /* 4815cf9dd55SDavid Howells * Search the directory for a single name 4821da177e4SLinus Torvalds * - if afs_dir_iterate_block() spots this function, it'll pass the FID 4831da177e4SLinus Torvalds * uniquifier through dtype 4841da177e4SLinus Torvalds */ 4855cf9dd55SDavid Howells static int afs_lookup_one_filldir(struct dir_context *ctx, const char *name, 486ac7576f4SMiklos Szeredi int nlen, loff_t fpos, u64 ino, unsigned dtype) 4871da177e4SLinus Torvalds { 4885cf9dd55SDavid Howells struct afs_lookup_one_cookie *cookie = 4895cf9dd55SDavid Howells container_of(ctx, struct afs_lookup_one_cookie, ctx); 4901da177e4SLinus Torvalds 4911bbae9f8SAl Viro _enter("{%s,%u},%s,%u,,%llu,%u", 4921bbae9f8SAl Viro cookie->name.name, cookie->name.len, name, nlen, 493ba3e0e1aSDavid S. Miller (unsigned long long) ino, dtype); 4941da177e4SLinus Torvalds 49508e0e7c8SDavid Howells /* insanity checks first */ 49600317636SDavid Howells BUILD_BUG_ON(sizeof(union afs_xdr_dir_block) != 2048); 49700317636SDavid Howells BUILD_BUG_ON(sizeof(union afs_xdr_dirent) != 32); 49808e0e7c8SDavid Howells 4991bbae9f8SAl Viro if (cookie->name.len != nlen || 5001bbae9f8SAl Viro memcmp(cookie->name.name, name, nlen) != 0) { 5011da177e4SLinus Torvalds _leave(" = 0 [no]"); 5021da177e4SLinus Torvalds return 0; 5031da177e4SLinus Torvalds } 5041da177e4SLinus Torvalds 5051da177e4SLinus Torvalds cookie->fid.vnode = ino; 5061da177e4SLinus Torvalds cookie->fid.unique = dtype; 5071da177e4SLinus Torvalds cookie->found = 1; 5081da177e4SLinus Torvalds 5091da177e4SLinus Torvalds _leave(" = -1 [found]"); 5101da177e4SLinus Torvalds return -1; 511ec26815aSDavid Howells } 5121da177e4SLinus Torvalds 5131da177e4SLinus Torvalds /* 5145cf9dd55SDavid Howells * Do a lookup of a single name in a directory 515260a9803SDavid Howells * - just returns the FID the dentry name maps to if found 5161da177e4SLinus Torvalds */ 5175cf9dd55SDavid Howells static int afs_do_lookup_one(struct inode *dir, struct dentry *dentry, 51800d3b7a4SDavid Howells struct afs_fid *fid, struct key *key) 5191da177e4SLinus Torvalds { 5201bbae9f8SAl Viro struct afs_super_info *as = dir->i_sb->s_fs_info; 5215cf9dd55SDavid Howells struct afs_lookup_one_cookie cookie = { 5225cf9dd55SDavid Howells .ctx.actor = afs_lookup_one_filldir, 5231bbae9f8SAl Viro .name = dentry->d_name, 5241bbae9f8SAl Viro .fid.vid = as->volume->vid 5251bbae9f8SAl Viro }; 5261da177e4SLinus Torvalds int ret; 5271da177e4SLinus Torvalds 528a455589fSAl Viro _enter("{%lu},%p{%pd},", dir->i_ino, dentry, dentry); 5291da177e4SLinus Torvalds 5301da177e4SLinus Torvalds /* search the directory */ 5311bbae9f8SAl Viro ret = afs_dir_iterate(dir, &cookie.ctx, key); 5321da177e4SLinus Torvalds if (ret < 0) { 53308e0e7c8SDavid Howells _leave(" = %d [iter]", ret); 53408e0e7c8SDavid Howells return ret; 5351da177e4SLinus Torvalds } 5361da177e4SLinus Torvalds 5371da177e4SLinus Torvalds ret = -ENOENT; 5381da177e4SLinus Torvalds if (!cookie.found) { 53908e0e7c8SDavid Howells _leave(" = -ENOENT [not found]"); 54008e0e7c8SDavid Howells return -ENOENT; 54108e0e7c8SDavid Howells } 54208e0e7c8SDavid Howells 54308e0e7c8SDavid Howells *fid = cookie.fid; 54408e0e7c8SDavid Howells _leave(" = 0 { vn=%u u=%u }", fid->vnode, fid->unique); 54508e0e7c8SDavid Howells return 0; 54608e0e7c8SDavid Howells } 54708e0e7c8SDavid Howells 54808e0e7c8SDavid Howells /* 5495cf9dd55SDavid Howells * search the directory for a name 5505cf9dd55SDavid Howells * - if afs_dir_iterate_block() spots this function, it'll pass the FID 5515cf9dd55SDavid Howells * uniquifier through dtype 5525cf9dd55SDavid Howells */ 5535cf9dd55SDavid Howells static int afs_lookup_filldir(struct dir_context *ctx, const char *name, 5545cf9dd55SDavid Howells int nlen, loff_t fpos, u64 ino, unsigned dtype) 5555cf9dd55SDavid Howells { 5565cf9dd55SDavid Howells struct afs_lookup_cookie *cookie = 5575cf9dd55SDavid Howells container_of(ctx, struct afs_lookup_cookie, ctx); 5585cf9dd55SDavid Howells int ret; 5595cf9dd55SDavid Howells 5605cf9dd55SDavid Howells _enter("{%s,%u},%s,%u,,%llu,%u", 5615cf9dd55SDavid Howells cookie->name.name, cookie->name.len, name, nlen, 5625cf9dd55SDavid Howells (unsigned long long) ino, dtype); 5635cf9dd55SDavid Howells 5645cf9dd55SDavid Howells /* insanity checks first */ 56500317636SDavid Howells BUILD_BUG_ON(sizeof(union afs_xdr_dir_block) != 2048); 56600317636SDavid Howells BUILD_BUG_ON(sizeof(union afs_xdr_dirent) != 32); 5675cf9dd55SDavid Howells 5685cf9dd55SDavid Howells if (cookie->found) { 5695cf9dd55SDavid Howells if (cookie->nr_fids < 50) { 5705cf9dd55SDavid Howells cookie->fids[cookie->nr_fids].vnode = ino; 5715cf9dd55SDavid Howells cookie->fids[cookie->nr_fids].unique = dtype; 5725cf9dd55SDavid Howells cookie->nr_fids++; 5735cf9dd55SDavid Howells } 5745cf9dd55SDavid Howells } else if (cookie->name.len == nlen && 5755cf9dd55SDavid Howells memcmp(cookie->name.name, name, nlen) == 0) { 5765cf9dd55SDavid Howells cookie->fids[0].vnode = ino; 5775cf9dd55SDavid Howells cookie->fids[0].unique = dtype; 5785cf9dd55SDavid Howells cookie->found = 1; 5795cf9dd55SDavid Howells if (cookie->one_only) 5805cf9dd55SDavid Howells return -1; 5815cf9dd55SDavid Howells } 5825cf9dd55SDavid Howells 5835cf9dd55SDavid Howells ret = cookie->nr_fids >= 50 ? -1 : 0; 5845cf9dd55SDavid Howells _leave(" = %d", ret); 5855cf9dd55SDavid Howells return ret; 5865cf9dd55SDavid Howells } 5875cf9dd55SDavid Howells 5885cf9dd55SDavid Howells /* 5895cf9dd55SDavid Howells * Do a lookup in a directory. We make use of bulk lookup to query a slew of 5905cf9dd55SDavid Howells * files in one go and create inodes for them. The inode of the file we were 5915cf9dd55SDavid Howells * asked for is returned. 5925cf9dd55SDavid Howells */ 5935cf9dd55SDavid Howells static struct inode *afs_do_lookup(struct inode *dir, struct dentry *dentry, 5945cf9dd55SDavid Howells struct key *key) 5955cf9dd55SDavid Howells { 5965cf9dd55SDavid Howells struct afs_lookup_cookie *cookie; 5975cf9dd55SDavid Howells struct afs_cb_interest *cbi = NULL; 5985cf9dd55SDavid Howells struct afs_super_info *as = dir->i_sb->s_fs_info; 5995cf9dd55SDavid Howells struct afs_iget_data data; 6005cf9dd55SDavid Howells struct afs_fs_cursor fc; 6015cf9dd55SDavid Howells struct afs_vnode *dvnode = AFS_FS_I(dir); 6025cf9dd55SDavid Howells struct inode *inode = NULL; 6035cf9dd55SDavid Howells int ret, i; 6045cf9dd55SDavid Howells 6055cf9dd55SDavid Howells _enter("{%lu},%p{%pd},", dir->i_ino, dentry, dentry); 6065cf9dd55SDavid Howells 6075cf9dd55SDavid Howells cookie = kzalloc(sizeof(struct afs_lookup_cookie), GFP_KERNEL); 6085cf9dd55SDavid Howells if (!cookie) 6095cf9dd55SDavid Howells return ERR_PTR(-ENOMEM); 6105cf9dd55SDavid Howells 6115cf9dd55SDavid Howells cookie->ctx.actor = afs_lookup_filldir; 6125cf9dd55SDavid Howells cookie->name = dentry->d_name; 6135cf9dd55SDavid Howells cookie->nr_fids = 1; /* slot 0 is saved for the fid we actually want */ 6145cf9dd55SDavid Howells 6155cf9dd55SDavid Howells read_seqlock_excl(&dvnode->cb_lock); 6165cf9dd55SDavid Howells if (dvnode->cb_interest && 6175cf9dd55SDavid Howells dvnode->cb_interest->server && 6185cf9dd55SDavid Howells test_bit(AFS_SERVER_FL_NO_IBULK, &dvnode->cb_interest->server->flags)) 6195cf9dd55SDavid Howells cookie->one_only = true; 6205cf9dd55SDavid Howells read_sequnlock_excl(&dvnode->cb_lock); 6215cf9dd55SDavid Howells 6225cf9dd55SDavid Howells for (i = 0; i < 50; i++) 6235cf9dd55SDavid Howells cookie->fids[i].vid = as->volume->vid; 6245cf9dd55SDavid Howells 6255cf9dd55SDavid Howells /* search the directory */ 6265cf9dd55SDavid Howells ret = afs_dir_iterate(dir, &cookie->ctx, key); 6275cf9dd55SDavid Howells if (ret < 0) { 6285cf9dd55SDavid Howells inode = ERR_PTR(ret); 6295cf9dd55SDavid Howells goto out; 6305cf9dd55SDavid Howells } 6315cf9dd55SDavid Howells 6325cf9dd55SDavid Howells inode = ERR_PTR(-ENOENT); 6335cf9dd55SDavid Howells if (!cookie->found) 6345cf9dd55SDavid Howells goto out; 6355cf9dd55SDavid Howells 6365cf9dd55SDavid Howells /* Check to see if we already have an inode for the primary fid. */ 6375cf9dd55SDavid Howells data.volume = dvnode->volume; 6385cf9dd55SDavid Howells data.fid = cookie->fids[0]; 6395cf9dd55SDavid Howells inode = ilookup5(dir->i_sb, cookie->fids[0].vnode, afs_iget5_test, &data); 6405cf9dd55SDavid Howells if (inode) 6415cf9dd55SDavid Howells goto out; 6425cf9dd55SDavid Howells 6435cf9dd55SDavid Howells /* Need space for examining all the selected files */ 6445cf9dd55SDavid Howells inode = ERR_PTR(-ENOMEM); 6455cf9dd55SDavid Howells cookie->statuses = kcalloc(cookie->nr_fids, sizeof(struct afs_file_status), 6465cf9dd55SDavid Howells GFP_KERNEL); 6475cf9dd55SDavid Howells if (!cookie->statuses) 6485cf9dd55SDavid Howells goto out; 6495cf9dd55SDavid Howells 6505cf9dd55SDavid Howells cookie->callbacks = kcalloc(cookie->nr_fids, sizeof(struct afs_callback), 6515cf9dd55SDavid Howells GFP_KERNEL); 6525cf9dd55SDavid Howells if (!cookie->callbacks) 6535cf9dd55SDavid Howells goto out_s; 6545cf9dd55SDavid Howells 6555cf9dd55SDavid Howells /* Try FS.InlineBulkStatus first. Abort codes for the individual 6565cf9dd55SDavid Howells * lookups contained therein are stored in the reply without aborting 6575cf9dd55SDavid Howells * the whole operation. 6585cf9dd55SDavid Howells */ 6595cf9dd55SDavid Howells if (cookie->one_only) 6605cf9dd55SDavid Howells goto no_inline_bulk_status; 6615cf9dd55SDavid Howells 6625cf9dd55SDavid Howells inode = ERR_PTR(-ERESTARTSYS); 6635cf9dd55SDavid Howells if (afs_begin_vnode_operation(&fc, dvnode, key)) { 6645cf9dd55SDavid Howells while (afs_select_fileserver(&fc)) { 6655cf9dd55SDavid Howells if (test_bit(AFS_SERVER_FL_NO_IBULK, 6665cf9dd55SDavid Howells &fc.cbi->server->flags)) { 6675cf9dd55SDavid Howells fc.ac.abort_code = RX_INVALID_OPERATION; 6685cf9dd55SDavid Howells fc.ac.error = -ECONNABORTED; 6695cf9dd55SDavid Howells break; 6705cf9dd55SDavid Howells } 6715cf9dd55SDavid Howells afs_fs_inline_bulk_status(&fc, 6725cf9dd55SDavid Howells afs_v2net(dvnode), 6735cf9dd55SDavid Howells cookie->fids, 6745cf9dd55SDavid Howells cookie->statuses, 6755cf9dd55SDavid Howells cookie->callbacks, 6765cf9dd55SDavid Howells cookie->nr_fids, NULL); 6775cf9dd55SDavid Howells } 6785cf9dd55SDavid Howells 6795cf9dd55SDavid Howells if (fc.ac.error == 0) 6805cf9dd55SDavid Howells cbi = afs_get_cb_interest(fc.cbi); 6815cf9dd55SDavid Howells if (fc.ac.abort_code == RX_INVALID_OPERATION) 6825cf9dd55SDavid Howells set_bit(AFS_SERVER_FL_NO_IBULK, &fc.cbi->server->flags); 6835cf9dd55SDavid Howells inode = ERR_PTR(afs_end_vnode_operation(&fc)); 6845cf9dd55SDavid Howells } 6855cf9dd55SDavid Howells 6865cf9dd55SDavid Howells if (!IS_ERR(inode)) 6875cf9dd55SDavid Howells goto success; 6885cf9dd55SDavid Howells if (fc.ac.abort_code != RX_INVALID_OPERATION) 6895cf9dd55SDavid Howells goto out_c; 6905cf9dd55SDavid Howells 6915cf9dd55SDavid Howells no_inline_bulk_status: 6925cf9dd55SDavid Howells /* We could try FS.BulkStatus next, but this aborts the entire op if 6935cf9dd55SDavid Howells * any of the lookups fails - so, for the moment, revert to 6945cf9dd55SDavid Howells * FS.FetchStatus for just the primary fid. 6955cf9dd55SDavid Howells */ 6965cf9dd55SDavid Howells cookie->nr_fids = 1; 6975cf9dd55SDavid Howells inode = ERR_PTR(-ERESTARTSYS); 6985cf9dd55SDavid Howells if (afs_begin_vnode_operation(&fc, dvnode, key)) { 6995cf9dd55SDavid Howells while (afs_select_fileserver(&fc)) { 7005cf9dd55SDavid Howells afs_fs_fetch_status(&fc, 7015cf9dd55SDavid Howells afs_v2net(dvnode), 7025cf9dd55SDavid Howells cookie->fids, 7035cf9dd55SDavid Howells cookie->statuses, 7045cf9dd55SDavid Howells cookie->callbacks, 7055cf9dd55SDavid Howells NULL); 7065cf9dd55SDavid Howells } 7075cf9dd55SDavid Howells 7085cf9dd55SDavid Howells if (fc.ac.error == 0) 7095cf9dd55SDavid Howells cbi = afs_get_cb_interest(fc.cbi); 7105cf9dd55SDavid Howells inode = ERR_PTR(afs_end_vnode_operation(&fc)); 7115cf9dd55SDavid Howells } 7125cf9dd55SDavid Howells 7135cf9dd55SDavid Howells if (IS_ERR(inode)) 7145cf9dd55SDavid Howells goto out_c; 7155cf9dd55SDavid Howells 7165cf9dd55SDavid Howells for (i = 0; i < cookie->nr_fids; i++) 7175cf9dd55SDavid Howells cookie->statuses[i].abort_code = 0; 7185cf9dd55SDavid Howells 7195cf9dd55SDavid Howells success: 7205cf9dd55SDavid Howells /* Turn all the files into inodes and save the first one - which is the 7215cf9dd55SDavid Howells * one we actually want. 7225cf9dd55SDavid Howells */ 7235cf9dd55SDavid Howells if (cookie->statuses[0].abort_code != 0) 7245cf9dd55SDavid Howells inode = ERR_PTR(afs_abort_to_error(cookie->statuses[0].abort_code)); 7255cf9dd55SDavid Howells 7265cf9dd55SDavid Howells for (i = 0; i < cookie->nr_fids; i++) { 7275cf9dd55SDavid Howells struct inode *ti; 7285cf9dd55SDavid Howells 7295cf9dd55SDavid Howells if (cookie->statuses[i].abort_code != 0) 7305cf9dd55SDavid Howells continue; 7315cf9dd55SDavid Howells 7325cf9dd55SDavid Howells ti = afs_iget(dir->i_sb, key, &cookie->fids[i], 7335cf9dd55SDavid Howells &cookie->statuses[i], 7345cf9dd55SDavid Howells &cookie->callbacks[i], 7355cf9dd55SDavid Howells cbi); 7365cf9dd55SDavid Howells if (i == 0) { 7375cf9dd55SDavid Howells inode = ti; 7385cf9dd55SDavid Howells } else { 7395cf9dd55SDavid Howells if (!IS_ERR(ti)) 7405cf9dd55SDavid Howells iput(ti); 7415cf9dd55SDavid Howells } 7425cf9dd55SDavid Howells } 7435cf9dd55SDavid Howells 7445cf9dd55SDavid Howells out_c: 7455cf9dd55SDavid Howells afs_put_cb_interest(afs_v2net(dvnode), cbi); 7465cf9dd55SDavid Howells kfree(cookie->callbacks); 7475cf9dd55SDavid Howells out_s: 7485cf9dd55SDavid Howells kfree(cookie->statuses); 7495cf9dd55SDavid Howells out: 7505cf9dd55SDavid Howells kfree(cookie); 7515cf9dd55SDavid Howells return inode; 7525cf9dd55SDavid Howells } 7535cf9dd55SDavid Howells 7545cf9dd55SDavid Howells /* 7556f8880d8SDavid Howells * Look up an entry in a directory with @sys substitution. 7566f8880d8SDavid Howells */ 7576f8880d8SDavid Howells static struct dentry *afs_lookup_atsys(struct inode *dir, struct dentry *dentry, 7586f8880d8SDavid Howells struct key *key) 7596f8880d8SDavid Howells { 7606f8880d8SDavid Howells struct afs_sysnames *subs; 7616f8880d8SDavid Howells struct afs_net *net = afs_i2net(dir); 7626f8880d8SDavid Howells struct dentry *ret; 7636f8880d8SDavid Howells char *buf, *p, *name; 7646f8880d8SDavid Howells int len, i; 7656f8880d8SDavid Howells 7666f8880d8SDavid Howells _enter(""); 7676f8880d8SDavid Howells 7686f8880d8SDavid Howells ret = ERR_PTR(-ENOMEM); 7696f8880d8SDavid Howells p = buf = kmalloc(AFSNAMEMAX, GFP_KERNEL); 7706f8880d8SDavid Howells if (!buf) 7716f8880d8SDavid Howells goto out_p; 7726f8880d8SDavid Howells if (dentry->d_name.len > 4) { 7736f8880d8SDavid Howells memcpy(p, dentry->d_name.name, dentry->d_name.len - 4); 7746f8880d8SDavid Howells p += dentry->d_name.len - 4; 7756f8880d8SDavid Howells } 7766f8880d8SDavid Howells 7776f8880d8SDavid Howells /* There is an ordered list of substitutes that we have to try. */ 7786f8880d8SDavid Howells read_lock(&net->sysnames_lock); 7796f8880d8SDavid Howells subs = net->sysnames; 7806f8880d8SDavid Howells refcount_inc(&subs->usage); 7816f8880d8SDavid Howells read_unlock(&net->sysnames_lock); 7826f8880d8SDavid Howells 7836f8880d8SDavid Howells for (i = 0; i < subs->nr; i++) { 7846f8880d8SDavid Howells name = subs->subs[i]; 7856f8880d8SDavid Howells len = dentry->d_name.len - 4 + strlen(name); 7866f8880d8SDavid Howells if (len >= AFSNAMEMAX) { 7876f8880d8SDavid Howells ret = ERR_PTR(-ENAMETOOLONG); 7886f8880d8SDavid Howells goto out_s; 7896f8880d8SDavid Howells } 7906f8880d8SDavid Howells 7916f8880d8SDavid Howells strcpy(p, name); 7926f8880d8SDavid Howells ret = lookup_one_len(buf, dentry->d_parent, len); 7936f8880d8SDavid Howells if (IS_ERR(ret) || d_is_positive(ret)) 7946f8880d8SDavid Howells goto out_s; 7956f8880d8SDavid Howells dput(ret); 7966f8880d8SDavid Howells } 7976f8880d8SDavid Howells 7986f8880d8SDavid Howells /* We don't want to d_add() the @sys dentry here as we don't want to 7996f8880d8SDavid Howells * the cached dentry to hide changes to the sysnames list. 8006f8880d8SDavid Howells */ 8016f8880d8SDavid Howells ret = NULL; 8026f8880d8SDavid Howells out_s: 8036f8880d8SDavid Howells afs_put_sysnames(subs); 8046f8880d8SDavid Howells kfree(buf); 8056f8880d8SDavid Howells out_p: 8066f8880d8SDavid Howells key_put(key); 8076f8880d8SDavid Howells return ret; 8086f8880d8SDavid Howells } 8096f8880d8SDavid Howells 8106f8880d8SDavid Howells /* 81108e0e7c8SDavid Howells * look up an entry in a directory 81208e0e7c8SDavid Howells */ 813260a9803SDavid Howells static struct dentry *afs_lookup(struct inode *dir, struct dentry *dentry, 81400cd8dd3SAl Viro unsigned int flags) 81508e0e7c8SDavid Howells { 8165cf9dd55SDavid Howells struct afs_vnode *dvnode = AFS_FS_I(dir); 81708e0e7c8SDavid Howells struct inode *inode; 81800d3b7a4SDavid Howells struct key *key; 81908e0e7c8SDavid Howells int ret; 82008e0e7c8SDavid Howells 821a455589fSAl Viro _enter("{%x:%u},%p{%pd},", 8225cf9dd55SDavid Howells dvnode->fid.vid, dvnode->fid.vnode, dentry, dentry); 823260a9803SDavid Howells 8242b0143b5SDavid Howells ASSERTCMP(d_inode(dentry), ==, NULL); 82508e0e7c8SDavid Howells 82645222b9eSDavid Howells if (dentry->d_name.len >= AFSNAMEMAX) { 82708e0e7c8SDavid Howells _leave(" = -ENAMETOOLONG"); 82808e0e7c8SDavid Howells return ERR_PTR(-ENAMETOOLONG); 82908e0e7c8SDavid Howells } 83008e0e7c8SDavid Howells 8315cf9dd55SDavid Howells if (test_bit(AFS_VNODE_DELETED, &dvnode->flags)) { 83208e0e7c8SDavid Howells _leave(" = -ESTALE"); 83308e0e7c8SDavid Howells return ERR_PTR(-ESTALE); 83408e0e7c8SDavid Howells } 83508e0e7c8SDavid Howells 8365cf9dd55SDavid Howells key = afs_request_key(dvnode->volume->cell); 83700d3b7a4SDavid Howells if (IS_ERR(key)) { 83800d3b7a4SDavid Howells _leave(" = %ld [key]", PTR_ERR(key)); 839e231c2eeSDavid Howells return ERR_CAST(key); 84000d3b7a4SDavid Howells } 84100d3b7a4SDavid Howells 8425cf9dd55SDavid Howells ret = afs_validate(dvnode, key); 84308e0e7c8SDavid Howells if (ret < 0) { 84400d3b7a4SDavid Howells key_put(key); 845260a9803SDavid Howells _leave(" = %d [val]", ret); 8461da177e4SLinus Torvalds return ERR_PTR(ret); 8471da177e4SLinus Torvalds } 8481da177e4SLinus Torvalds 8496f8880d8SDavid Howells if (dentry->d_name.len >= 4 && 8506f8880d8SDavid Howells dentry->d_name.name[dentry->d_name.len - 4] == '@' && 8516f8880d8SDavid Howells dentry->d_name.name[dentry->d_name.len - 3] == 's' && 8526f8880d8SDavid Howells dentry->d_name.name[dentry->d_name.len - 2] == 'y' && 8536f8880d8SDavid Howells dentry->d_name.name[dentry->d_name.len - 1] == 's') 8546f8880d8SDavid Howells return afs_lookup_atsys(dir, dentry, key); 8556f8880d8SDavid Howells 856d55b4da4SDavid Howells afs_stat_v(dvnode, n_lookup); 8575cf9dd55SDavid Howells inode = afs_do_lookup(dir, dentry, key); 8585cf9dd55SDavid Howells if (IS_ERR(inode)) { 8595cf9dd55SDavid Howells ret = PTR_ERR(inode); 8604d673da1SDavid Howells if (ret == -ENOENT) { 8615cf9dd55SDavid Howells inode = afs_try_auto_mntpt(dentry, dir); 862bec5eb61Swanglei if (!IS_ERR(inode)) { 863bec5eb61Swanglei key_put(key); 864bec5eb61Swanglei goto success; 865bec5eb61Swanglei } 866bec5eb61Swanglei 867bec5eb61Swanglei ret = PTR_ERR(inode); 8684d673da1SDavid Howells } 8694d673da1SDavid Howells 870260a9803SDavid Howells key_put(key); 871260a9803SDavid Howells if (ret == -ENOENT) { 872260a9803SDavid Howells d_add(dentry, NULL); 873260a9803SDavid Howells _leave(" = NULL [negative]"); 874260a9803SDavid Howells return NULL; 875260a9803SDavid Howells } 876260a9803SDavid Howells _leave(" = %d [do]", ret); 877260a9803SDavid Howells return ERR_PTR(ret); 878260a9803SDavid Howells } 8795cf9dd55SDavid Howells dentry->d_fsdata = (void *)(unsigned long)dvnode->status.data_version; 880260a9803SDavid Howells 8811da177e4SLinus Torvalds /* instantiate the dentry */ 88200d3b7a4SDavid Howells key_put(key); 88308e0e7c8SDavid Howells if (IS_ERR(inode)) { 88408e0e7c8SDavid Howells _leave(" = %ld", PTR_ERR(inode)); 885e231c2eeSDavid Howells return ERR_CAST(inode); 8861da177e4SLinus Torvalds } 8871da177e4SLinus Torvalds 888bec5eb61Swanglei success: 8891da177e4SLinus Torvalds d_add(dentry, inode); 8905cf9dd55SDavid Howells _leave(" = 0 { ino=%lu v=%u }", 8912b0143b5SDavid Howells d_inode(dentry)->i_ino, 8922b0143b5SDavid Howells d_inode(dentry)->i_generation); 8931da177e4SLinus Torvalds 8941da177e4SLinus Torvalds return NULL; 895ec26815aSDavid Howells } 8961da177e4SLinus Torvalds 8971da177e4SLinus Torvalds /* 8981da177e4SLinus Torvalds * check that a dentry lookup hit has found a valid entry 8991da177e4SLinus Torvalds * - NOTE! the hit can be a negative hit too, so we can't assume we have an 9001da177e4SLinus Torvalds * inode 9011da177e4SLinus Torvalds */ 9020b728e19SAl Viro static int afs_d_revalidate(struct dentry *dentry, unsigned int flags) 9031da177e4SLinus Torvalds { 904260a9803SDavid Howells struct afs_vnode *vnode, *dir; 905dd0d9a46SArtem Bityutskiy struct afs_fid uninitialized_var(fid); 9061da177e4SLinus Torvalds struct dentry *parent; 907c435ee34SDavid Howells struct inode *inode; 90800d3b7a4SDavid Howells struct key *key; 909a4ff7401SDavid Howells long dir_version, de_version; 9101da177e4SLinus Torvalds int ret; 9111da177e4SLinus Torvalds 9120b728e19SAl Viro if (flags & LOOKUP_RCU) 91334286d66SNick Piggin return -ECHILD; 91434286d66SNick Piggin 915c435ee34SDavid Howells if (d_really_is_positive(dentry)) { 9162b0143b5SDavid Howells vnode = AFS_FS_I(d_inode(dentry)); 917a455589fSAl Viro _enter("{v={%x:%u} n=%pd fl=%lx},", 918a455589fSAl Viro vnode->fid.vid, vnode->fid.vnode, dentry, 919260a9803SDavid Howells vnode->flags); 920c435ee34SDavid Howells } else { 921a455589fSAl Viro _enter("{neg n=%pd}", dentry); 922c435ee34SDavid Howells } 9231da177e4SLinus Torvalds 924260a9803SDavid Howells key = afs_request_key(AFS_FS_S(dentry->d_sb)->volume->cell); 92500d3b7a4SDavid Howells if (IS_ERR(key)) 92600d3b7a4SDavid Howells key = NULL; 92700d3b7a4SDavid Howells 928c435ee34SDavid Howells if (d_really_is_positive(dentry)) { 929c435ee34SDavid Howells inode = d_inode(dentry); 930c435ee34SDavid Howells if (inode) { 931c435ee34SDavid Howells vnode = AFS_FS_I(inode); 932c435ee34SDavid Howells afs_validate(vnode, key); 933c435ee34SDavid Howells if (test_bit(AFS_VNODE_DELETED, &vnode->flags)) 934c435ee34SDavid Howells goto out_bad; 935c435ee34SDavid Howells } 936c435ee34SDavid Howells } 937c435ee34SDavid Howells 9381da177e4SLinus Torvalds /* lock down the parent dentry so we can peer at it */ 93908e0e7c8SDavid Howells parent = dget_parent(dentry); 9402b0143b5SDavid Howells dir = AFS_FS_I(d_inode(parent)); 9411da177e4SLinus Torvalds 942260a9803SDavid Howells /* validate the parent directory */ 943260a9803SDavid Howells afs_validate(dir, key); 944260a9803SDavid Howells 945260a9803SDavid Howells if (test_bit(AFS_VNODE_DELETED, &dir->flags)) { 946a455589fSAl Viro _debug("%pd: parent dir deleted", dentry); 947c435ee34SDavid Howells goto out_bad_parent; 9481da177e4SLinus Torvalds } 9491da177e4SLinus Torvalds 950a4ff7401SDavid Howells /* We only need to invalidate a dentry if the server's copy changed 951a4ff7401SDavid Howells * behind our back. If we made the change, it's no problem. Note that 952a4ff7401SDavid Howells * on a 32-bit system, we only have 32 bits in the dentry to store the 953a4ff7401SDavid Howells * version. 954a4ff7401SDavid Howells */ 955a4ff7401SDavid Howells dir_version = (long)dir->status.data_version; 956a4ff7401SDavid Howells de_version = (long)dentry->d_fsdata; 957a4ff7401SDavid Howells if (de_version == dir_version) 958a4ff7401SDavid Howells goto out_valid; 959a4ff7401SDavid Howells 960a4ff7401SDavid Howells dir_version = (long)dir->invalid_before; 961a4ff7401SDavid Howells if (de_version - dir_version >= 0) 962a4ff7401SDavid Howells goto out_valid; 963260a9803SDavid Howells 96408e0e7c8SDavid Howells _debug("dir modified"); 965d55b4da4SDavid Howells afs_stat_v(dir, n_reval); 9661da177e4SLinus Torvalds 9671da177e4SLinus Torvalds /* search the directory for this vnode */ 9685cf9dd55SDavid Howells ret = afs_do_lookup_one(&dir->vfs_inode, dentry, &fid, key); 969260a9803SDavid Howells switch (ret) { 970260a9803SDavid Howells case 0: 971260a9803SDavid Howells /* the filename maps to something */ 9722b0143b5SDavid Howells if (d_really_is_negative(dentry)) 973c435ee34SDavid Howells goto out_bad_parent; 974c435ee34SDavid Howells inode = d_inode(dentry); 975c435ee34SDavid Howells if (is_bad_inode(inode)) { 976a455589fSAl Viro printk("kAFS: afs_d_revalidate: %pd2 has bad inode\n", 977a455589fSAl Viro dentry); 978c435ee34SDavid Howells goto out_bad_parent; 9791da177e4SLinus Torvalds } 9801da177e4SLinus Torvalds 981c435ee34SDavid Howells vnode = AFS_FS_I(inode); 982c435ee34SDavid Howells 9831da177e4SLinus Torvalds /* if the vnode ID has changed, then the dirent points to a 9841da177e4SLinus Torvalds * different file */ 98508e0e7c8SDavid Howells if (fid.vnode != vnode->fid.vnode) { 986a455589fSAl Viro _debug("%pd: dirent changed [%u != %u]", 987a455589fSAl Viro dentry, fid.vnode, 98808e0e7c8SDavid Howells vnode->fid.vnode); 9891da177e4SLinus Torvalds goto not_found; 9901da177e4SLinus Torvalds } 9911da177e4SLinus Torvalds 9921da177e4SLinus Torvalds /* if the vnode ID uniqifier has changed, then the file has 993260a9803SDavid Howells * been deleted and replaced, and the original vnode ID has 994260a9803SDavid Howells * been reused */ 99508e0e7c8SDavid Howells if (fid.unique != vnode->fid.unique) { 996a455589fSAl Viro _debug("%pd: file deleted (uq %u -> %u I:%u)", 997a455589fSAl Viro dentry, fid.unique, 9987a224228SJean Noel Cordenner vnode->fid.unique, 999c435ee34SDavid Howells vnode->vfs_inode.i_generation); 1000c435ee34SDavid Howells write_seqlock(&vnode->cb_lock); 100108e0e7c8SDavid Howells set_bit(AFS_VNODE_DELETED, &vnode->flags); 1002c435ee34SDavid Howells write_sequnlock(&vnode->cb_lock); 1003260a9803SDavid Howells goto not_found; 1004260a9803SDavid Howells } 1005260a9803SDavid Howells goto out_valid; 1006260a9803SDavid Howells 1007260a9803SDavid Howells case -ENOENT: 1008260a9803SDavid Howells /* the filename is unknown */ 1009a455589fSAl Viro _debug("%pd: dirent not found", dentry); 10102b0143b5SDavid Howells if (d_really_is_positive(dentry)) 1011260a9803SDavid Howells goto not_found; 1012260a9803SDavid Howells goto out_valid; 1013260a9803SDavid Howells 1014260a9803SDavid Howells default: 1015a455589fSAl Viro _debug("failed to iterate dir %pd: %d", 1016a455589fSAl Viro parent, ret); 1017c435ee34SDavid Howells goto out_bad_parent; 10181da177e4SLinus Torvalds } 101908e0e7c8SDavid Howells 10201da177e4SLinus Torvalds out_valid: 1021a4ff7401SDavid Howells dentry->d_fsdata = (void *)dir_version; 10221da177e4SLinus Torvalds dput(parent); 102300d3b7a4SDavid Howells key_put(key); 10241da177e4SLinus Torvalds _leave(" = 1 [valid]"); 10251da177e4SLinus Torvalds return 1; 10261da177e4SLinus Torvalds 10271da177e4SLinus Torvalds /* the dirent, if it exists, now points to a different vnode */ 10281da177e4SLinus Torvalds not_found: 10291da177e4SLinus Torvalds spin_lock(&dentry->d_lock); 10301da177e4SLinus Torvalds dentry->d_flags |= DCACHE_NFSFS_RENAMED; 10311da177e4SLinus Torvalds spin_unlock(&dentry->d_lock); 10321da177e4SLinus Torvalds 1033c435ee34SDavid Howells out_bad_parent: 1034a455589fSAl Viro _debug("dropping dentry %pd2", dentry); 10351da177e4SLinus Torvalds dput(parent); 1036c435ee34SDavid Howells out_bad: 103700d3b7a4SDavid Howells key_put(key); 10381da177e4SLinus Torvalds 10391da177e4SLinus Torvalds _leave(" = 0 [bad]"); 10401da177e4SLinus Torvalds return 0; 1041ec26815aSDavid Howells } 10421da177e4SLinus Torvalds 10431da177e4SLinus Torvalds /* 10441da177e4SLinus Torvalds * allow the VFS to enquire as to whether a dentry should be unhashed (mustn't 10451da177e4SLinus Torvalds * sleep) 10461da177e4SLinus Torvalds * - called from dput() when d_count is going to 0. 10471da177e4SLinus Torvalds * - return 1 to request dentry be unhashed, 0 otherwise 10481da177e4SLinus Torvalds */ 1049fe15ce44SNick Piggin static int afs_d_delete(const struct dentry *dentry) 10501da177e4SLinus Torvalds { 1051a455589fSAl Viro _enter("%pd", dentry); 10521da177e4SLinus Torvalds 10531da177e4SLinus Torvalds if (dentry->d_flags & DCACHE_NFSFS_RENAMED) 10541da177e4SLinus Torvalds goto zap; 10551da177e4SLinus Torvalds 10562b0143b5SDavid Howells if (d_really_is_positive(dentry) && 10572b0143b5SDavid Howells (test_bit(AFS_VNODE_DELETED, &AFS_FS_I(d_inode(dentry))->flags) || 10582b0143b5SDavid Howells test_bit(AFS_VNODE_PSEUDODIR, &AFS_FS_I(d_inode(dentry))->flags))) 10591da177e4SLinus Torvalds goto zap; 10601da177e4SLinus Torvalds 10611da177e4SLinus Torvalds _leave(" = 0 [keep]"); 10621da177e4SLinus Torvalds return 0; 10631da177e4SLinus Torvalds 10641da177e4SLinus Torvalds zap: 10651da177e4SLinus Torvalds _leave(" = 1 [zap]"); 10661da177e4SLinus Torvalds return 1; 1067ec26815aSDavid Howells } 1068260a9803SDavid Howells 1069260a9803SDavid Howells /* 1070260a9803SDavid Howells * handle dentry release 1071260a9803SDavid Howells */ 107266c7e1d3SDavid Howells void afs_d_release(struct dentry *dentry) 1073260a9803SDavid Howells { 1074a455589fSAl Viro _enter("%pd", dentry); 1075260a9803SDavid Howells } 1076260a9803SDavid Howells 1077260a9803SDavid Howells /* 1078d2ddc776SDavid Howells * Create a new inode for create/mkdir/symlink 1079d2ddc776SDavid Howells */ 1080d2ddc776SDavid Howells static void afs_vnode_new_inode(struct afs_fs_cursor *fc, 1081d2ddc776SDavid Howells struct dentry *new_dentry, 1082d2ddc776SDavid Howells struct afs_fid *newfid, 1083d2ddc776SDavid Howells struct afs_file_status *newstatus, 1084d2ddc776SDavid Howells struct afs_callback *newcb) 1085d2ddc776SDavid Howells { 1086d2ddc776SDavid Howells struct inode *inode; 1087d2ddc776SDavid Howells 1088d2ddc776SDavid Howells if (fc->ac.error < 0) 1089d2ddc776SDavid Howells return; 1090d2ddc776SDavid Howells 1091bc1527dcSDavid Howells d_drop(new_dentry); 1092bc1527dcSDavid Howells 1093d2ddc776SDavid Howells inode = afs_iget(fc->vnode->vfs_inode.i_sb, fc->key, 1094d2ddc776SDavid Howells newfid, newstatus, newcb, fc->cbi); 1095d2ddc776SDavid Howells if (IS_ERR(inode)) { 1096d2ddc776SDavid Howells /* ENOMEM or EINTR at a really inconvenient time - just abandon 1097d2ddc776SDavid Howells * the new directory on the server. 1098d2ddc776SDavid Howells */ 1099d2ddc776SDavid Howells fc->ac.error = PTR_ERR(inode); 1100d2ddc776SDavid Howells return; 1101d2ddc776SDavid Howells } 1102d2ddc776SDavid Howells 1103bc1527dcSDavid Howells d_add(new_dentry, inode); 1104d2ddc776SDavid Howells } 1105d2ddc776SDavid Howells 1106d2ddc776SDavid Howells /* 1107260a9803SDavid Howells * create a directory on an AFS filesystem 1108260a9803SDavid Howells */ 110918bb1db3SAl Viro static int afs_mkdir(struct inode *dir, struct dentry *dentry, umode_t mode) 1110260a9803SDavid Howells { 1111d2ddc776SDavid Howells struct afs_file_status newstatus; 1112d2ddc776SDavid Howells struct afs_fs_cursor fc; 1113d2ddc776SDavid Howells struct afs_callback newcb; 1114d2ddc776SDavid Howells struct afs_vnode *dvnode = AFS_FS_I(dir); 1115d2ddc776SDavid Howells struct afs_fid newfid; 1116260a9803SDavid Howells struct key *key; 1117260a9803SDavid Howells int ret; 1118260a9803SDavid Howells 1119d2ddc776SDavid Howells mode |= S_IFDIR; 1120260a9803SDavid Howells 1121a455589fSAl Viro _enter("{%x:%u},{%pd},%ho", 1122a455589fSAl Viro dvnode->fid.vid, dvnode->fid.vnode, dentry, mode); 1123260a9803SDavid Howells 1124260a9803SDavid Howells key = afs_request_key(dvnode->volume->cell); 1125260a9803SDavid Howells if (IS_ERR(key)) { 1126260a9803SDavid Howells ret = PTR_ERR(key); 1127260a9803SDavid Howells goto error; 1128260a9803SDavid Howells } 1129260a9803SDavid Howells 1130d2ddc776SDavid Howells ret = -ERESTARTSYS; 1131d2ddc776SDavid Howells if (afs_begin_vnode_operation(&fc, dvnode, key)) { 1132d2ddc776SDavid Howells while (afs_select_fileserver(&fc)) { 1133d2ddc776SDavid Howells fc.cb_break = dvnode->cb_break + dvnode->cb_s_break; 1134d2ddc776SDavid Howells afs_fs_create(&fc, dentry->d_name.name, mode, 1135d2ddc776SDavid Howells &newfid, &newstatus, &newcb); 1136d2ddc776SDavid Howells } 1137d2ddc776SDavid Howells 1138d2ddc776SDavid Howells afs_check_for_remote_deletion(&fc, fc.vnode); 1139d2ddc776SDavid Howells afs_vnode_commit_status(&fc, dvnode, fc.cb_break); 1140d2ddc776SDavid Howells afs_vnode_new_inode(&fc, dentry, &newfid, &newstatus, &newcb); 1141d2ddc776SDavid Howells ret = afs_end_vnode_operation(&fc); 1142260a9803SDavid Howells if (ret < 0) 1143d2ddc776SDavid Howells goto error_key; 11444433b691SDavid Howells } else { 11454433b691SDavid Howells goto error_key; 1146260a9803SDavid Howells } 1147260a9803SDavid Howells 1148260a9803SDavid Howells key_put(key); 1149260a9803SDavid Howells _leave(" = 0"); 1150260a9803SDavid Howells return 0; 1151260a9803SDavid Howells 1152d2ddc776SDavid Howells error_key: 1153260a9803SDavid Howells key_put(key); 1154260a9803SDavid Howells error: 1155260a9803SDavid Howells d_drop(dentry); 1156260a9803SDavid Howells _leave(" = %d", ret); 1157260a9803SDavid Howells return ret; 1158260a9803SDavid Howells } 1159260a9803SDavid Howells 1160260a9803SDavid Howells /* 1161d2ddc776SDavid Howells * Remove a subdir from a directory. 1162260a9803SDavid Howells */ 1163d2ddc776SDavid Howells static void afs_dir_remove_subdir(struct dentry *dentry) 1164260a9803SDavid Howells { 11652b0143b5SDavid Howells if (d_really_is_positive(dentry)) { 1166d2ddc776SDavid Howells struct afs_vnode *vnode = AFS_FS_I(d_inode(dentry)); 1167d2ddc776SDavid Howells 1168260a9803SDavid Howells clear_nlink(&vnode->vfs_inode); 1169260a9803SDavid Howells set_bit(AFS_VNODE_DELETED, &vnode->flags); 1170c435ee34SDavid Howells clear_bit(AFS_VNODE_CB_PROMISED, &vnode->flags); 1171260a9803SDavid Howells } 1172260a9803SDavid Howells } 1173260a9803SDavid Howells 1174260a9803SDavid Howells /* 1175d2ddc776SDavid Howells * remove a directory from an AFS filesystem 1176260a9803SDavid Howells */ 1177d2ddc776SDavid Howells static int afs_rmdir(struct inode *dir, struct dentry *dentry) 1178260a9803SDavid Howells { 1179d2ddc776SDavid Howells struct afs_fs_cursor fc; 1180d2ddc776SDavid Howells struct afs_vnode *dvnode = AFS_FS_I(dir); 1181260a9803SDavid Howells struct key *key; 1182260a9803SDavid Howells int ret; 1183260a9803SDavid Howells 1184a455589fSAl Viro _enter("{%x:%u},{%pd}", 1185a455589fSAl Viro dvnode->fid.vid, dvnode->fid.vnode, dentry); 1186260a9803SDavid Howells 1187260a9803SDavid Howells key = afs_request_key(dvnode->volume->cell); 1188260a9803SDavid Howells if (IS_ERR(key)) { 1189260a9803SDavid Howells ret = PTR_ERR(key); 1190260a9803SDavid Howells goto error; 1191260a9803SDavid Howells } 1192260a9803SDavid Howells 1193d2ddc776SDavid Howells ret = -ERESTARTSYS; 1194d2ddc776SDavid Howells if (afs_begin_vnode_operation(&fc, dvnode, key)) { 1195d2ddc776SDavid Howells while (afs_select_fileserver(&fc)) { 1196d2ddc776SDavid Howells fc.cb_break = dvnode->cb_break + dvnode->cb_s_break; 1197d2ddc776SDavid Howells afs_fs_remove(&fc, dentry->d_name.name, true); 1198260a9803SDavid Howells } 1199260a9803SDavid Howells 1200d2ddc776SDavid Howells afs_vnode_commit_status(&fc, dvnode, fc.cb_break); 1201d2ddc776SDavid Howells ret = afs_end_vnode_operation(&fc); 1202d2ddc776SDavid Howells if (ret == 0) 1203d2ddc776SDavid Howells afs_dir_remove_subdir(dentry); 1204260a9803SDavid Howells } 1205260a9803SDavid Howells 1206260a9803SDavid Howells key_put(key); 1207d2ddc776SDavid Howells error: 1208d2ddc776SDavid Howells return ret; 1209d2ddc776SDavid Howells } 1210260a9803SDavid Howells 1211d2ddc776SDavid Howells /* 1212d2ddc776SDavid Howells * Remove a link to a file or symlink from a directory. 1213d2ddc776SDavid Howells * 1214d2ddc776SDavid Howells * If the file was not deleted due to excess hard links, the fileserver will 1215d2ddc776SDavid Howells * break the callback promise on the file - if it had one - before it returns 1216d2ddc776SDavid Howells * to us, and if it was deleted, it won't 1217d2ddc776SDavid Howells * 1218d2ddc776SDavid Howells * However, if we didn't have a callback promise outstanding, or it was 1219d2ddc776SDavid Howells * outstanding on a different server, then it won't break it either... 1220d2ddc776SDavid Howells */ 1221440fbc3aSDavid Howells static int afs_dir_remove_link(struct dentry *dentry, struct key *key, 1222440fbc3aSDavid Howells unsigned long d_version_before, 1223440fbc3aSDavid Howells unsigned long d_version_after) 1224d2ddc776SDavid Howells { 1225440fbc3aSDavid Howells bool dir_valid; 1226d2ddc776SDavid Howells int ret = 0; 1227d2ddc776SDavid Howells 1228440fbc3aSDavid Howells /* There were no intervening changes on the server if the version 1229440fbc3aSDavid Howells * number we got back was incremented by exactly 1. 1230440fbc3aSDavid Howells */ 1231440fbc3aSDavid Howells dir_valid = (d_version_after == d_version_before + 1); 1232440fbc3aSDavid Howells 1233d2ddc776SDavid Howells if (d_really_is_positive(dentry)) { 1234d2ddc776SDavid Howells struct afs_vnode *vnode = AFS_FS_I(d_inode(dentry)); 1235d2ddc776SDavid Howells 1236440fbc3aSDavid Howells if (dir_valid) { 1237440fbc3aSDavid Howells drop_nlink(&vnode->vfs_inode); 1238440fbc3aSDavid Howells if (vnode->vfs_inode.i_nlink == 0) { 1239440fbc3aSDavid Howells set_bit(AFS_VNODE_DELETED, &vnode->flags); 1240440fbc3aSDavid Howells clear_bit(AFS_VNODE_CB_PROMISED, &vnode->flags); 1241440fbc3aSDavid Howells } 1242440fbc3aSDavid Howells ret = 0; 1243440fbc3aSDavid Howells } else { 1244440fbc3aSDavid Howells clear_bit(AFS_VNODE_CB_PROMISED, &vnode->flags); 1245440fbc3aSDavid Howells 1246d2ddc776SDavid Howells if (test_bit(AFS_VNODE_DELETED, &vnode->flags)) 1247d2ddc776SDavid Howells kdebug("AFS_VNODE_DELETED"); 1248d2ddc776SDavid Howells 1249d2ddc776SDavid Howells ret = afs_validate(vnode, key); 1250d2ddc776SDavid Howells if (ret == -ESTALE) 1251d2ddc776SDavid Howells ret = 0; 1252440fbc3aSDavid Howells } 1253d2ddc776SDavid Howells _debug("nlink %d [val %d]", vnode->vfs_inode.i_nlink, ret); 1254d2ddc776SDavid Howells } 1255d2ddc776SDavid Howells 1256d2ddc776SDavid Howells return ret; 1257d2ddc776SDavid Howells } 1258d2ddc776SDavid Howells 1259d2ddc776SDavid Howells /* 1260d2ddc776SDavid Howells * Remove a file or symlink from an AFS filesystem. 1261d2ddc776SDavid Howells */ 1262d2ddc776SDavid Howells static int afs_unlink(struct inode *dir, struct dentry *dentry) 1263d2ddc776SDavid Howells { 1264d2ddc776SDavid Howells struct afs_fs_cursor fc; 1265d2ddc776SDavid Howells struct afs_vnode *dvnode = AFS_FS_I(dir), *vnode; 1266d2ddc776SDavid Howells struct key *key; 1267440fbc3aSDavid Howells unsigned long d_version = (unsigned long)dentry->d_fsdata; 1268d2ddc776SDavid Howells int ret; 1269d2ddc776SDavid Howells 1270d2ddc776SDavid Howells _enter("{%x:%u},{%pd}", 1271d2ddc776SDavid Howells dvnode->fid.vid, dvnode->fid.vnode, dentry); 1272d2ddc776SDavid Howells 1273d2ddc776SDavid Howells if (dentry->d_name.len >= AFSNAMEMAX) 1274d2ddc776SDavid Howells return -ENAMETOOLONG; 1275d2ddc776SDavid Howells 1276d2ddc776SDavid Howells key = afs_request_key(dvnode->volume->cell); 1277d2ddc776SDavid Howells if (IS_ERR(key)) { 1278d2ddc776SDavid Howells ret = PTR_ERR(key); 1279d2ddc776SDavid Howells goto error; 1280d2ddc776SDavid Howells } 1281d2ddc776SDavid Howells 1282d2ddc776SDavid Howells /* Try to make sure we have a callback promise on the victim. */ 1283d2ddc776SDavid Howells if (d_really_is_positive(dentry)) { 1284d2ddc776SDavid Howells vnode = AFS_FS_I(d_inode(dentry)); 1285d2ddc776SDavid Howells ret = afs_validate(vnode, key); 1286d2ddc776SDavid Howells if (ret < 0) 1287d2ddc776SDavid Howells goto error_key; 1288d2ddc776SDavid Howells } 1289d2ddc776SDavid Howells 1290d2ddc776SDavid Howells ret = -ERESTARTSYS; 1291d2ddc776SDavid Howells if (afs_begin_vnode_operation(&fc, dvnode, key)) { 1292d2ddc776SDavid Howells while (afs_select_fileserver(&fc)) { 1293d2ddc776SDavid Howells fc.cb_break = dvnode->cb_break + dvnode->cb_s_break; 1294d2ddc776SDavid Howells afs_fs_remove(&fc, dentry->d_name.name, false); 1295d2ddc776SDavid Howells } 1296d2ddc776SDavid Howells 1297d2ddc776SDavid Howells afs_vnode_commit_status(&fc, dvnode, fc.cb_break); 1298d2ddc776SDavid Howells ret = afs_end_vnode_operation(&fc); 1299d2ddc776SDavid Howells if (ret == 0) 1300440fbc3aSDavid Howells ret = afs_dir_remove_link( 1301440fbc3aSDavid Howells dentry, key, d_version, 1302440fbc3aSDavid Howells (unsigned long)dvnode->status.data_version); 1303d2ddc776SDavid Howells } 1304d2ddc776SDavid Howells 1305d2ddc776SDavid Howells error_key: 1306260a9803SDavid Howells key_put(key); 1307260a9803SDavid Howells error: 1308260a9803SDavid Howells _leave(" = %d", ret); 1309260a9803SDavid Howells return ret; 1310260a9803SDavid Howells } 1311260a9803SDavid Howells 1312260a9803SDavid Howells /* 1313260a9803SDavid Howells * create a regular file on an AFS filesystem 1314260a9803SDavid Howells */ 13154acdaf27SAl Viro static int afs_create(struct inode *dir, struct dentry *dentry, umode_t mode, 1316ebfc3b49SAl Viro bool excl) 1317260a9803SDavid Howells { 1318d2ddc776SDavid Howells struct afs_fs_cursor fc; 1319d2ddc776SDavid Howells struct afs_file_status newstatus; 1320d2ddc776SDavid Howells struct afs_callback newcb; 132143dd388bSColin Ian King struct afs_vnode *dvnode = AFS_FS_I(dir); 1322d2ddc776SDavid Howells struct afs_fid newfid; 1323260a9803SDavid Howells struct key *key; 1324260a9803SDavid Howells int ret; 1325260a9803SDavid Howells 1326d2ddc776SDavid Howells mode |= S_IFREG; 1327260a9803SDavid Howells 1328a455589fSAl Viro _enter("{%x:%u},{%pd},%ho,", 1329a455589fSAl Viro dvnode->fid.vid, dvnode->fid.vnode, dentry, mode); 1330260a9803SDavid Howells 1331d2ddc776SDavid Howells ret = -ENAMETOOLONG; 1332d2ddc776SDavid Howells if (dentry->d_name.len >= AFSNAMEMAX) 1333d2ddc776SDavid Howells goto error; 1334d2ddc776SDavid Howells 1335260a9803SDavid Howells key = afs_request_key(dvnode->volume->cell); 1336260a9803SDavid Howells if (IS_ERR(key)) { 1337260a9803SDavid Howells ret = PTR_ERR(key); 1338260a9803SDavid Howells goto error; 1339260a9803SDavid Howells } 1340260a9803SDavid Howells 1341d2ddc776SDavid Howells ret = -ERESTARTSYS; 1342d2ddc776SDavid Howells if (afs_begin_vnode_operation(&fc, dvnode, key)) { 1343d2ddc776SDavid Howells while (afs_select_fileserver(&fc)) { 1344d2ddc776SDavid Howells fc.cb_break = dvnode->cb_break + dvnode->cb_s_break; 1345d2ddc776SDavid Howells afs_fs_create(&fc, dentry->d_name.name, mode, 1346d2ddc776SDavid Howells &newfid, &newstatus, &newcb); 1347d2ddc776SDavid Howells } 1348d2ddc776SDavid Howells 1349d2ddc776SDavid Howells afs_check_for_remote_deletion(&fc, fc.vnode); 1350d2ddc776SDavid Howells afs_vnode_commit_status(&fc, dvnode, fc.cb_break); 1351d2ddc776SDavid Howells afs_vnode_new_inode(&fc, dentry, &newfid, &newstatus, &newcb); 1352d2ddc776SDavid Howells ret = afs_end_vnode_operation(&fc); 1353260a9803SDavid Howells if (ret < 0) 1354d2ddc776SDavid Howells goto error_key; 13554433b691SDavid Howells } else { 13564433b691SDavid Howells goto error_key; 1357260a9803SDavid Howells } 1358260a9803SDavid Howells 1359260a9803SDavid Howells key_put(key); 1360260a9803SDavid Howells _leave(" = 0"); 1361260a9803SDavid Howells return 0; 1362260a9803SDavid Howells 1363d2ddc776SDavid Howells error_key: 1364260a9803SDavid Howells key_put(key); 1365260a9803SDavid Howells error: 1366260a9803SDavid Howells d_drop(dentry); 1367260a9803SDavid Howells _leave(" = %d", ret); 1368260a9803SDavid Howells return ret; 1369260a9803SDavid Howells } 1370260a9803SDavid Howells 1371260a9803SDavid Howells /* 1372260a9803SDavid Howells * create a hard link between files in an AFS filesystem 1373260a9803SDavid Howells */ 1374260a9803SDavid Howells static int afs_link(struct dentry *from, struct inode *dir, 1375260a9803SDavid Howells struct dentry *dentry) 1376260a9803SDavid Howells { 1377d2ddc776SDavid Howells struct afs_fs_cursor fc; 1378260a9803SDavid Howells struct afs_vnode *dvnode, *vnode; 1379260a9803SDavid Howells struct key *key; 1380260a9803SDavid Howells int ret; 1381260a9803SDavid Howells 13822b0143b5SDavid Howells vnode = AFS_FS_I(d_inode(from)); 1383260a9803SDavid Howells dvnode = AFS_FS_I(dir); 1384260a9803SDavid Howells 1385a455589fSAl Viro _enter("{%x:%u},{%x:%u},{%pd}", 1386260a9803SDavid Howells vnode->fid.vid, vnode->fid.vnode, 1387260a9803SDavid Howells dvnode->fid.vid, dvnode->fid.vnode, 1388a455589fSAl Viro dentry); 1389260a9803SDavid Howells 1390d2ddc776SDavid Howells ret = -ENAMETOOLONG; 1391d2ddc776SDavid Howells if (dentry->d_name.len >= AFSNAMEMAX) 1392d2ddc776SDavid Howells goto error; 1393d2ddc776SDavid Howells 1394260a9803SDavid Howells key = afs_request_key(dvnode->volume->cell); 1395260a9803SDavid Howells if (IS_ERR(key)) { 1396260a9803SDavid Howells ret = PTR_ERR(key); 1397260a9803SDavid Howells goto error; 1398260a9803SDavid Howells } 1399260a9803SDavid Howells 1400d2ddc776SDavid Howells ret = -ERESTARTSYS; 1401d2ddc776SDavid Howells if (afs_begin_vnode_operation(&fc, dvnode, key)) { 1402d2ddc776SDavid Howells if (mutex_lock_interruptible_nested(&vnode->io_lock, 1) < 0) { 1403d2ddc776SDavid Howells afs_end_vnode_operation(&fc); 1404bc1527dcSDavid Howells goto error_key; 1405d2ddc776SDavid Howells } 1406260a9803SDavid Howells 1407d2ddc776SDavid Howells while (afs_select_fileserver(&fc)) { 1408d2ddc776SDavid Howells fc.cb_break = dvnode->cb_break + dvnode->cb_s_break; 1409d2ddc776SDavid Howells fc.cb_break_2 = vnode->cb_break + vnode->cb_s_break; 1410d2ddc776SDavid Howells afs_fs_link(&fc, vnode, dentry->d_name.name); 1411d2ddc776SDavid Howells } 1412d2ddc776SDavid Howells 1413d2ddc776SDavid Howells afs_vnode_commit_status(&fc, dvnode, fc.cb_break); 1414d2ddc776SDavid Howells afs_vnode_commit_status(&fc, vnode, fc.cb_break_2); 14157de9c6eeSAl Viro ihold(&vnode->vfs_inode); 1416260a9803SDavid Howells d_instantiate(dentry, &vnode->vfs_inode); 1417d2ddc776SDavid Howells 1418d2ddc776SDavid Howells mutex_unlock(&vnode->io_lock); 1419d2ddc776SDavid Howells ret = afs_end_vnode_operation(&fc); 1420d2ddc776SDavid Howells if (ret < 0) 1421d2ddc776SDavid Howells goto error_key; 14224433b691SDavid Howells } else { 14234433b691SDavid Howells goto error_key; 1424d2ddc776SDavid Howells } 1425d2ddc776SDavid Howells 1426260a9803SDavid Howells key_put(key); 1427260a9803SDavid Howells _leave(" = 0"); 1428260a9803SDavid Howells return 0; 1429260a9803SDavid Howells 1430d2ddc776SDavid Howells error_key: 1431260a9803SDavid Howells key_put(key); 1432260a9803SDavid Howells error: 1433260a9803SDavid Howells d_drop(dentry); 1434260a9803SDavid Howells _leave(" = %d", ret); 1435260a9803SDavid Howells return ret; 1436260a9803SDavid Howells } 1437260a9803SDavid Howells 1438260a9803SDavid Howells /* 1439260a9803SDavid Howells * create a symlink in an AFS filesystem 1440260a9803SDavid Howells */ 1441260a9803SDavid Howells static int afs_symlink(struct inode *dir, struct dentry *dentry, 1442260a9803SDavid Howells const char *content) 1443260a9803SDavid Howells { 1444d2ddc776SDavid Howells struct afs_fs_cursor fc; 1445d2ddc776SDavid Howells struct afs_file_status newstatus; 1446d2ddc776SDavid Howells struct afs_vnode *dvnode = AFS_FS_I(dir); 1447d2ddc776SDavid Howells struct afs_fid newfid; 1448260a9803SDavid Howells struct key *key; 1449260a9803SDavid Howells int ret; 1450260a9803SDavid Howells 1451a455589fSAl Viro _enter("{%x:%u},{%pd},%s", 1452a455589fSAl Viro dvnode->fid.vid, dvnode->fid.vnode, dentry, 1453260a9803SDavid Howells content); 1454260a9803SDavid Howells 1455d2ddc776SDavid Howells ret = -ENAMETOOLONG; 1456d2ddc776SDavid Howells if (dentry->d_name.len >= AFSNAMEMAX) 1457d2ddc776SDavid Howells goto error; 1458d2ddc776SDavid Howells 1459260a9803SDavid Howells ret = -EINVAL; 146045222b9eSDavid Howells if (strlen(content) >= AFSPATHMAX) 1461260a9803SDavid Howells goto error; 1462260a9803SDavid Howells 1463260a9803SDavid Howells key = afs_request_key(dvnode->volume->cell); 1464260a9803SDavid Howells if (IS_ERR(key)) { 1465260a9803SDavid Howells ret = PTR_ERR(key); 1466260a9803SDavid Howells goto error; 1467260a9803SDavid Howells } 1468260a9803SDavid Howells 1469d2ddc776SDavid Howells ret = -ERESTARTSYS; 1470d2ddc776SDavid Howells if (afs_begin_vnode_operation(&fc, dvnode, key)) { 1471d2ddc776SDavid Howells while (afs_select_fileserver(&fc)) { 1472d2ddc776SDavid Howells fc.cb_break = dvnode->cb_break + dvnode->cb_s_break; 1473d2ddc776SDavid Howells afs_fs_symlink(&fc, dentry->d_name.name, content, 1474d2ddc776SDavid Howells &newfid, &newstatus); 1475d2ddc776SDavid Howells } 1476d2ddc776SDavid Howells 1477d2ddc776SDavid Howells afs_check_for_remote_deletion(&fc, fc.vnode); 1478d2ddc776SDavid Howells afs_vnode_commit_status(&fc, dvnode, fc.cb_break); 1479d2ddc776SDavid Howells afs_vnode_new_inode(&fc, dentry, &newfid, &newstatus, NULL); 1480d2ddc776SDavid Howells ret = afs_end_vnode_operation(&fc); 1481260a9803SDavid Howells if (ret < 0) 1482d2ddc776SDavid Howells goto error_key; 14834433b691SDavid Howells } else { 14844433b691SDavid Howells goto error_key; 1485260a9803SDavid Howells } 1486260a9803SDavid Howells 1487260a9803SDavid Howells key_put(key); 1488260a9803SDavid Howells _leave(" = 0"); 1489260a9803SDavid Howells return 0; 1490260a9803SDavid Howells 1491d2ddc776SDavid Howells error_key: 1492260a9803SDavid Howells key_put(key); 1493260a9803SDavid Howells error: 1494260a9803SDavid Howells d_drop(dentry); 1495260a9803SDavid Howells _leave(" = %d", ret); 1496260a9803SDavid Howells return ret; 1497260a9803SDavid Howells } 1498260a9803SDavid Howells 1499260a9803SDavid Howells /* 1500260a9803SDavid Howells * rename a file in an AFS filesystem and/or move it between directories 1501260a9803SDavid Howells */ 1502260a9803SDavid Howells static int afs_rename(struct inode *old_dir, struct dentry *old_dentry, 15031cd66c93SMiklos Szeredi struct inode *new_dir, struct dentry *new_dentry, 15041cd66c93SMiklos Szeredi unsigned int flags) 1505260a9803SDavid Howells { 1506d2ddc776SDavid Howells struct afs_fs_cursor fc; 1507260a9803SDavid Howells struct afs_vnode *orig_dvnode, *new_dvnode, *vnode; 1508260a9803SDavid Howells struct key *key; 1509260a9803SDavid Howells int ret; 1510260a9803SDavid Howells 15111cd66c93SMiklos Szeredi if (flags) 15121cd66c93SMiklos Szeredi return -EINVAL; 15131cd66c93SMiklos Szeredi 15142b0143b5SDavid Howells vnode = AFS_FS_I(d_inode(old_dentry)); 1515260a9803SDavid Howells orig_dvnode = AFS_FS_I(old_dir); 1516260a9803SDavid Howells new_dvnode = AFS_FS_I(new_dir); 1517260a9803SDavid Howells 1518a455589fSAl Viro _enter("{%x:%u},{%x:%u},{%x:%u},{%pd}", 1519260a9803SDavid Howells orig_dvnode->fid.vid, orig_dvnode->fid.vnode, 1520260a9803SDavid Howells vnode->fid.vid, vnode->fid.vnode, 1521260a9803SDavid Howells new_dvnode->fid.vid, new_dvnode->fid.vnode, 1522a455589fSAl Viro new_dentry); 1523260a9803SDavid Howells 1524260a9803SDavid Howells key = afs_request_key(orig_dvnode->volume->cell); 1525260a9803SDavid Howells if (IS_ERR(key)) { 1526260a9803SDavid Howells ret = PTR_ERR(key); 1527260a9803SDavid Howells goto error; 1528260a9803SDavid Howells } 1529260a9803SDavid Howells 1530d2ddc776SDavid Howells ret = -ERESTARTSYS; 1531d2ddc776SDavid Howells if (afs_begin_vnode_operation(&fc, orig_dvnode, key)) { 1532d2ddc776SDavid Howells if (orig_dvnode != new_dvnode) { 1533d2ddc776SDavid Howells if (mutex_lock_interruptible_nested(&new_dvnode->io_lock, 1) < 0) { 1534d2ddc776SDavid Howells afs_end_vnode_operation(&fc); 1535bc1527dcSDavid Howells goto error_key; 1536d2ddc776SDavid Howells } 1537d2ddc776SDavid Howells } 1538d2ddc776SDavid Howells while (afs_select_fileserver(&fc)) { 1539d2ddc776SDavid Howells fc.cb_break = orig_dvnode->cb_break + orig_dvnode->cb_s_break; 1540d2ddc776SDavid Howells fc.cb_break_2 = new_dvnode->cb_break + new_dvnode->cb_s_break; 1541d2ddc776SDavid Howells afs_fs_rename(&fc, old_dentry->d_name.name, 1542d2ddc776SDavid Howells new_dvnode, new_dentry->d_name.name); 1543d2ddc776SDavid Howells } 1544d2ddc776SDavid Howells 1545d2ddc776SDavid Howells afs_vnode_commit_status(&fc, orig_dvnode, fc.cb_break); 1546d2ddc776SDavid Howells afs_vnode_commit_status(&fc, new_dvnode, fc.cb_break_2); 1547d2ddc776SDavid Howells if (orig_dvnode != new_dvnode) 1548d2ddc776SDavid Howells mutex_unlock(&new_dvnode->io_lock); 1549d2ddc776SDavid Howells ret = afs_end_vnode_operation(&fc); 1550260a9803SDavid Howells if (ret < 0) 1551d2ddc776SDavid Howells goto error_key; 1552d2ddc776SDavid Howells } 1553d2ddc776SDavid Howells 1554d2ddc776SDavid Howells error_key: 1555260a9803SDavid Howells key_put(key); 1556260a9803SDavid Howells error: 1557260a9803SDavid Howells _leave(" = %d", ret); 1558260a9803SDavid Howells return ret; 1559260a9803SDavid Howells } 1560f3ddee8dSDavid Howells 1561f3ddee8dSDavid Howells /* 1562f3ddee8dSDavid Howells * Release a directory page and clean up its private state if it's not busy 1563f3ddee8dSDavid Howells * - return true if the page can now be released, false if not 1564f3ddee8dSDavid Howells */ 1565f3ddee8dSDavid Howells static int afs_dir_releasepage(struct page *page, gfp_t gfp_flags) 1566f3ddee8dSDavid Howells { 1567f3ddee8dSDavid Howells struct afs_vnode *dvnode = AFS_FS_I(page->mapping->host); 1568f3ddee8dSDavid Howells 1569f3ddee8dSDavid Howells _enter("{{%x:%u}[%lu]}", dvnode->fid.vid, dvnode->fid.vnode, page->index); 1570f3ddee8dSDavid Howells 1571f3ddee8dSDavid Howells set_page_private(page, 0); 1572f3ddee8dSDavid Howells ClearPagePrivate(page); 1573f3ddee8dSDavid Howells 1574f3ddee8dSDavid Howells /* The directory will need reloading. */ 1575f3ddee8dSDavid Howells if (test_and_clear_bit(AFS_VNODE_DIR_VALID, &dvnode->flags)) 1576f3ddee8dSDavid Howells afs_stat_v(dvnode, n_relpg); 1577f3ddee8dSDavid Howells return 1; 1578f3ddee8dSDavid Howells } 1579f3ddee8dSDavid Howells 1580f3ddee8dSDavid Howells /* 1581f3ddee8dSDavid Howells * invalidate part or all of a page 1582f3ddee8dSDavid Howells * - release a page and clean up its private data if offset is 0 (indicating 1583f3ddee8dSDavid Howells * the entire page) 1584f3ddee8dSDavid Howells */ 1585f3ddee8dSDavid Howells static void afs_dir_invalidatepage(struct page *page, unsigned int offset, 1586f3ddee8dSDavid Howells unsigned int length) 1587f3ddee8dSDavid Howells { 1588f3ddee8dSDavid Howells struct afs_vnode *dvnode = AFS_FS_I(page->mapping->host); 1589f3ddee8dSDavid Howells 1590f3ddee8dSDavid Howells _enter("{%lu},%u,%u", page->index, offset, length); 1591f3ddee8dSDavid Howells 1592f3ddee8dSDavid Howells BUG_ON(!PageLocked(page)); 1593f3ddee8dSDavid Howells 1594f3ddee8dSDavid Howells /* The directory will need reloading. */ 1595f3ddee8dSDavid Howells if (test_and_clear_bit(AFS_VNODE_DIR_VALID, &dvnode->flags)) 1596f3ddee8dSDavid Howells afs_stat_v(dvnode, n_inval); 1597f3ddee8dSDavid Howells 1598f3ddee8dSDavid Howells /* we clean up only if the entire page is being invalidated */ 1599f3ddee8dSDavid Howells if (offset == 0 && length == PAGE_SIZE) { 1600f3ddee8dSDavid Howells set_page_private(page, 0); 1601f3ddee8dSDavid Howells ClearPagePrivate(page); 1602f3ddee8dSDavid Howells } 1603f3ddee8dSDavid Howells } 1604