12874c5fdSThomas Gleixner // SPDX-License-Identifier: GPL-2.0-or-later 21da177e4SLinus Torvalds /* dir.c: AFS filesystem directory handling 31da177e4SLinus Torvalds * 4f3ddee8dSDavid Howells * Copyright (C) 2002, 2018 Red Hat, Inc. All Rights Reserved. 51da177e4SLinus Torvalds * Written by David Howells (dhowells@redhat.com) 61da177e4SLinus Torvalds */ 71da177e4SLinus Torvalds 81da177e4SLinus Torvalds #include <linux/kernel.h> 91da177e4SLinus Torvalds #include <linux/fs.h> 1034286d66SNick Piggin #include <linux/namei.h> 111da177e4SLinus Torvalds #include <linux/pagemap.h> 12f3ddee8dSDavid Howells #include <linux/swap.h> 1300d3b7a4SDavid Howells #include <linux/ctype.h> 14e8edc6e0SAlexey Dobriyan #include <linux/sched.h> 15f3ddee8dSDavid Howells #include <linux/task_io_accounting_ops.h> 161da177e4SLinus Torvalds #include "internal.h" 17a58823acSDavid Howells #include "afs_fs.h" 184ea219a8SDavid Howells #include "xdr_fs.h" 191da177e4SLinus Torvalds 20260a9803SDavid Howells static struct dentry *afs_lookup(struct inode *dir, struct dentry *dentry, 2100cd8dd3SAl Viro unsigned int flags); 221da177e4SLinus Torvalds static int afs_dir_open(struct inode *inode, struct file *file); 231bbae9f8SAl Viro static int afs_readdir(struct file *file, struct dir_context *ctx); 240b728e19SAl Viro static int afs_d_revalidate(struct dentry *dentry, unsigned int flags); 25fe15ce44SNick Piggin static int afs_d_delete(const struct dentry *dentry); 2679ddbfa5SDavid Howells static void afs_d_iput(struct dentry *dentry, struct inode *inode); 275cf9dd55SDavid Howells static int afs_lookup_one_filldir(struct dir_context *ctx, const char *name, int nlen, 285cf9dd55SDavid Howells loff_t fpos, u64 ino, unsigned dtype); 29ac7576f4SMiklos Szeredi static int afs_lookup_filldir(struct dir_context *ctx, const char *name, int nlen, 30afefdbb2SDavid Howells loff_t fpos, u64 ino, unsigned dtype); 314acdaf27SAl Viro static int afs_create(struct inode *dir, struct dentry *dentry, umode_t mode, 32ebfc3b49SAl Viro bool excl); 3318bb1db3SAl Viro static int afs_mkdir(struct inode *dir, struct dentry *dentry, umode_t mode); 34260a9803SDavid Howells static int afs_rmdir(struct inode *dir, struct dentry *dentry); 35260a9803SDavid Howells static int afs_unlink(struct inode *dir, struct dentry *dentry); 36260a9803SDavid Howells static int afs_link(struct dentry *from, struct inode *dir, 37260a9803SDavid Howells struct dentry *dentry); 38260a9803SDavid Howells static int afs_symlink(struct inode *dir, struct dentry *dentry, 39260a9803SDavid Howells const char *content); 40260a9803SDavid Howells static int afs_rename(struct inode *old_dir, struct dentry *old_dentry, 411cd66c93SMiklos Szeredi struct inode *new_dir, struct dentry *new_dentry, 421cd66c93SMiklos Szeredi unsigned int flags); 43f3ddee8dSDavid Howells static int afs_dir_releasepage(struct page *page, gfp_t gfp_flags); 44f3ddee8dSDavid Howells static void afs_dir_invalidatepage(struct page *page, unsigned int offset, 45f3ddee8dSDavid Howells unsigned int length); 46f3ddee8dSDavid Howells 47f3ddee8dSDavid Howells static int afs_dir_set_page_dirty(struct page *page) 48f3ddee8dSDavid Howells { 49f3ddee8dSDavid Howells BUG(); /* This should never happen. */ 50f3ddee8dSDavid Howells } 511da177e4SLinus Torvalds 524b6f5d20SArjan van de Ven const struct file_operations afs_dir_file_operations = { 531da177e4SLinus Torvalds .open = afs_dir_open, 5400d3b7a4SDavid Howells .release = afs_release, 5529884effSAl Viro .iterate_shared = afs_readdir, 56e8d6c554SDavid Howells .lock = afs_lock, 573222a3e5SChristoph Hellwig .llseek = generic_file_llseek, 581da177e4SLinus Torvalds }; 591da177e4SLinus Torvalds 60754661f1SArjan van de Ven const struct inode_operations afs_dir_inode_operations = { 61260a9803SDavid Howells .create = afs_create, 62260a9803SDavid Howells .lookup = afs_lookup, 63260a9803SDavid Howells .link = afs_link, 64260a9803SDavid Howells .unlink = afs_unlink, 65260a9803SDavid Howells .symlink = afs_symlink, 66260a9803SDavid Howells .mkdir = afs_mkdir, 67260a9803SDavid Howells .rmdir = afs_rmdir, 682773bf00SMiklos Szeredi .rename = afs_rename, 6900d3b7a4SDavid Howells .permission = afs_permission, 70416351f2SDavid Howells .getattr = afs_getattr, 7131143d5dSDavid Howells .setattr = afs_setattr, 72d3e3b7eaSDavid Howells .listxattr = afs_listxattr, 731da177e4SLinus Torvalds }; 741da177e4SLinus Torvalds 75f3ddee8dSDavid Howells const struct address_space_operations afs_dir_aops = { 76f3ddee8dSDavid Howells .set_page_dirty = afs_dir_set_page_dirty, 77f3ddee8dSDavid Howells .releasepage = afs_dir_releasepage, 78f3ddee8dSDavid Howells .invalidatepage = afs_dir_invalidatepage, 79f3ddee8dSDavid Howells }; 80f3ddee8dSDavid Howells 81d61dcce2SAl Viro const struct dentry_operations afs_fs_dentry_operations = { 821da177e4SLinus Torvalds .d_revalidate = afs_d_revalidate, 831da177e4SLinus Torvalds .d_delete = afs_d_delete, 84260a9803SDavid Howells .d_release = afs_d_release, 85d18610b0SDavid Howells .d_automount = afs_d_automount, 8679ddbfa5SDavid Howells .d_iput = afs_d_iput, 871da177e4SLinus Torvalds }; 881da177e4SLinus Torvalds 895cf9dd55SDavid Howells struct afs_lookup_one_cookie { 905cf9dd55SDavid Howells struct dir_context ctx; 915cf9dd55SDavid Howells struct qstr name; 925cf9dd55SDavid Howells bool found; 935cf9dd55SDavid Howells struct afs_fid fid; 945cf9dd55SDavid Howells }; 955cf9dd55SDavid Howells 96260a9803SDavid Howells struct afs_lookup_cookie { 971bbae9f8SAl Viro struct dir_context ctx; 981bbae9f8SAl Viro struct qstr name; 995cf9dd55SDavid Howells bool found; 1005cf9dd55SDavid Howells bool one_only; 1015cf9dd55SDavid Howells unsigned short nr_fids; 10239db9815SDavid Howells struct inode **inodes; 10387182759SDavid Howells struct afs_status_cb *statuses; 1045cf9dd55SDavid Howells struct afs_fid fids[50]; 1051da177e4SLinus Torvalds }; 1061da177e4SLinus Torvalds 1071da177e4SLinus Torvalds /* 1081da177e4SLinus Torvalds * check that a directory page is valid 1091da177e4SLinus Torvalds */ 110f3ddee8dSDavid Howells static bool afs_dir_check_page(struct afs_vnode *dvnode, struct page *page, 111f3ddee8dSDavid Howells loff_t i_size) 1121da177e4SLinus Torvalds { 11300317636SDavid Howells struct afs_xdr_dir_page *dbuf; 114f3ddee8dSDavid Howells loff_t latter, off; 1151da177e4SLinus Torvalds int tmp, qty; 1161da177e4SLinus Torvalds 117dab17c1aSDavid Howells /* Determine how many magic numbers there should be in this page, but 118dab17c1aSDavid Howells * we must take care because the directory may change size under us. 119dab17c1aSDavid Howells */ 120dab17c1aSDavid Howells off = page_offset(page); 121dab17c1aSDavid Howells if (i_size <= off) 122dab17c1aSDavid Howells goto checked; 123dab17c1aSDavid Howells 124dab17c1aSDavid Howells latter = i_size - off; 1251da177e4SLinus Torvalds if (latter >= PAGE_SIZE) 1261da177e4SLinus Torvalds qty = PAGE_SIZE; 1271da177e4SLinus Torvalds else 1281da177e4SLinus Torvalds qty = latter; 12900317636SDavid Howells qty /= sizeof(union afs_xdr_dir_block); 1301da177e4SLinus Torvalds 1311da177e4SLinus Torvalds /* check them */ 13263a4681fSDavid Howells dbuf = kmap(page); 1331da177e4SLinus Torvalds for (tmp = 0; tmp < qty; tmp++) { 13400317636SDavid Howells if (dbuf->blocks[tmp].hdr.magic != AFS_DIR_MAGIC) { 135dab17c1aSDavid Howells printk("kAFS: %s(%lx): bad magic %d/%d is %04hx\n", 136f3ddee8dSDavid Howells __func__, dvnode->vfs_inode.i_ino, tmp, qty, 13700317636SDavid Howells ntohs(dbuf->blocks[tmp].hdr.magic)); 138f3ddee8dSDavid Howells trace_afs_dir_check_failed(dvnode, off, i_size); 13963a4681fSDavid Howells kunmap(page); 140f51375cdSDavid Howells trace_afs_file_error(dvnode, -EIO, afs_file_error_dir_bad_magic); 1411da177e4SLinus Torvalds goto error; 1421da177e4SLinus Torvalds } 14363a4681fSDavid Howells 14463a4681fSDavid Howells /* Make sure each block is NUL terminated so we can reasonably 14563a4681fSDavid Howells * use string functions on it. The filenames in the page 14663a4681fSDavid Howells * *should* be NUL-terminated anyway. 14763a4681fSDavid Howells */ 14863a4681fSDavid Howells ((u8 *)&dbuf->blocks[tmp])[AFS_DIR_BLOCK_SIZE - 1] = 0; 1491da177e4SLinus Torvalds } 1501da177e4SLinus Torvalds 15163a4681fSDavid Howells kunmap(page); 15263a4681fSDavid Howells 153dab17c1aSDavid Howells checked: 154f3ddee8dSDavid Howells afs_stat_v(dvnode, n_read_dir); 155be5b82dbSAl Viro return true; 1561da177e4SLinus Torvalds 1571da177e4SLinus Torvalds error: 158be5b82dbSAl Viro return false; 159ec26815aSDavid Howells } 1601da177e4SLinus Torvalds 1611da177e4SLinus Torvalds /* 162445b1028SDavid Howells * Check the contents of a directory that we've just read. 163445b1028SDavid Howells */ 164445b1028SDavid Howells static bool afs_dir_check_pages(struct afs_vnode *dvnode, struct afs_read *req) 165445b1028SDavid Howells { 166445b1028SDavid Howells struct afs_xdr_dir_page *dbuf; 167445b1028SDavid Howells unsigned int i, j, qty = PAGE_SIZE / sizeof(union afs_xdr_dir_block); 168445b1028SDavid Howells 169445b1028SDavid Howells for (i = 0; i < req->nr_pages; i++) 170445b1028SDavid Howells if (!afs_dir_check_page(dvnode, req->pages[i], req->actual_len)) 171445b1028SDavid Howells goto bad; 172445b1028SDavid Howells return true; 173445b1028SDavid Howells 174445b1028SDavid Howells bad: 175445b1028SDavid Howells pr_warn("DIR %llx:%llx f=%llx l=%llx al=%llx r=%llx\n", 176445b1028SDavid Howells dvnode->fid.vid, dvnode->fid.vnode, 177445b1028SDavid Howells req->file_size, req->len, req->actual_len, req->remain); 178445b1028SDavid Howells pr_warn("DIR %llx %x %x %x\n", 179445b1028SDavid Howells req->pos, req->index, req->nr_pages, req->offset); 180445b1028SDavid Howells 181445b1028SDavid Howells for (i = 0; i < req->nr_pages; i++) { 182445b1028SDavid Howells dbuf = kmap(req->pages[i]); 183445b1028SDavid Howells for (j = 0; j < qty; j++) { 184445b1028SDavid Howells union afs_xdr_dir_block *block = &dbuf->blocks[j]; 185445b1028SDavid Howells 186445b1028SDavid Howells pr_warn("[%02x] %32phN\n", i * qty + j, block); 187445b1028SDavid Howells } 188445b1028SDavid Howells kunmap(req->pages[i]); 189445b1028SDavid Howells } 190445b1028SDavid Howells return false; 191445b1028SDavid Howells } 192445b1028SDavid Howells 193445b1028SDavid Howells /* 1941da177e4SLinus Torvalds * open an AFS directory file 1951da177e4SLinus Torvalds */ 1961da177e4SLinus Torvalds static int afs_dir_open(struct inode *inode, struct file *file) 1971da177e4SLinus Torvalds { 1981da177e4SLinus Torvalds _enter("{%lu}", inode->i_ino); 1991da177e4SLinus Torvalds 20000317636SDavid Howells BUILD_BUG_ON(sizeof(union afs_xdr_dir_block) != 2048); 20100317636SDavid Howells BUILD_BUG_ON(sizeof(union afs_xdr_dirent) != 32); 2021da177e4SLinus Torvalds 20308e0e7c8SDavid Howells if (test_bit(AFS_VNODE_DELETED, &AFS_FS_I(inode)->flags)) 2041da177e4SLinus Torvalds return -ENOENT; 2051da177e4SLinus Torvalds 20600d3b7a4SDavid Howells return afs_open(inode, file); 207ec26815aSDavid Howells } 2081da177e4SLinus Torvalds 2091da177e4SLinus Torvalds /* 210f3ddee8dSDavid Howells * Read the directory into the pagecache in one go, scrubbing the previous 211f3ddee8dSDavid Howells * contents. The list of pages is returned, pinning them so that they don't 212f3ddee8dSDavid Howells * get reclaimed during the iteration. 213f3ddee8dSDavid Howells */ 214f3ddee8dSDavid Howells static struct afs_read *afs_read_dir(struct afs_vnode *dvnode, struct key *key) 215b61f7dcfSDavid Howells __acquires(&dvnode->validate_lock) 216f3ddee8dSDavid Howells { 217f3ddee8dSDavid Howells struct afs_read *req; 218f3ddee8dSDavid Howells loff_t i_size; 219f3ddee8dSDavid Howells int nr_pages, nr_inline, i, n; 220f3ddee8dSDavid Howells int ret = -ENOMEM; 221f3ddee8dSDavid Howells 222f3ddee8dSDavid Howells retry: 223f3ddee8dSDavid Howells i_size = i_size_read(&dvnode->vfs_inode); 224f3ddee8dSDavid Howells if (i_size < 2048) 225f51375cdSDavid Howells return ERR_PTR(afs_bad(dvnode, afs_file_error_dir_small)); 226f51375cdSDavid Howells if (i_size > 2048 * 1024) { 227f51375cdSDavid Howells trace_afs_file_error(dvnode, -EFBIG, afs_file_error_dir_big); 228f3ddee8dSDavid Howells return ERR_PTR(-EFBIG); 229f51375cdSDavid Howells } 230f3ddee8dSDavid Howells 231f3ddee8dSDavid Howells _enter("%llu", i_size); 232f3ddee8dSDavid Howells 233f3ddee8dSDavid Howells /* Get a request record to hold the page list. We want to hold it 234f3ddee8dSDavid Howells * inline if we can, but we don't want to make an order 1 allocation. 235f3ddee8dSDavid Howells */ 236f3ddee8dSDavid Howells nr_pages = (i_size + PAGE_SIZE - 1) / PAGE_SIZE; 237f3ddee8dSDavid Howells nr_inline = nr_pages; 238f3ddee8dSDavid Howells if (nr_inline > (PAGE_SIZE - sizeof(*req)) / sizeof(struct page *)) 239f3ddee8dSDavid Howells nr_inline = 0; 240f3ddee8dSDavid Howells 241ee102584SZhengyuan Liu req = kzalloc(struct_size(req, array, nr_inline), GFP_KERNEL); 242f3ddee8dSDavid Howells if (!req) 243f3ddee8dSDavid Howells return ERR_PTR(-ENOMEM); 244f3ddee8dSDavid Howells 245f3ddee8dSDavid Howells refcount_set(&req->usage, 1); 246f3ddee8dSDavid Howells req->nr_pages = nr_pages; 247f3ddee8dSDavid Howells req->actual_len = i_size; /* May change */ 248f3ddee8dSDavid Howells req->len = nr_pages * PAGE_SIZE; /* We can ask for more than there is */ 249f3ddee8dSDavid Howells req->data_version = dvnode->status.data_version; /* May change */ 250f3ddee8dSDavid Howells if (nr_inline > 0) { 251f3ddee8dSDavid Howells req->pages = req->array; 252f3ddee8dSDavid Howells } else { 253f3ddee8dSDavid Howells req->pages = kcalloc(nr_pages, sizeof(struct page *), 254f3ddee8dSDavid Howells GFP_KERNEL); 255f3ddee8dSDavid Howells if (!req->pages) 256f3ddee8dSDavid Howells goto error; 257f3ddee8dSDavid Howells } 258f3ddee8dSDavid Howells 259f3ddee8dSDavid Howells /* Get a list of all the pages that hold or will hold the directory 260f3ddee8dSDavid Howells * content. We need to fill in any gaps that we might find where the 261f3ddee8dSDavid Howells * memory reclaimer has been at work. If there are any gaps, we will 262f3ddee8dSDavid Howells * need to reread the entire directory contents. 263f3ddee8dSDavid Howells */ 264f3ddee8dSDavid Howells i = 0; 265f3ddee8dSDavid Howells do { 266f3ddee8dSDavid Howells n = find_get_pages_contig(dvnode->vfs_inode.i_mapping, i, 267f3ddee8dSDavid Howells req->nr_pages - i, 268f3ddee8dSDavid Howells req->pages + i); 269f3ddee8dSDavid Howells _debug("find %u at %u/%u", n, i, req->nr_pages); 270f3ddee8dSDavid Howells if (n == 0) { 271f3ddee8dSDavid Howells gfp_t gfp = dvnode->vfs_inode.i_mapping->gfp_mask; 272f3ddee8dSDavid Howells 273f3ddee8dSDavid Howells if (test_and_clear_bit(AFS_VNODE_DIR_VALID, &dvnode->flags)) 274f3ddee8dSDavid Howells afs_stat_v(dvnode, n_inval); 275f3ddee8dSDavid Howells 276f3ddee8dSDavid Howells ret = -ENOMEM; 277f3ddee8dSDavid Howells req->pages[i] = __page_cache_alloc(gfp); 278f3ddee8dSDavid Howells if (!req->pages[i]) 279f3ddee8dSDavid Howells goto error; 280f3ddee8dSDavid Howells ret = add_to_page_cache_lru(req->pages[i], 281f3ddee8dSDavid Howells dvnode->vfs_inode.i_mapping, 282f3ddee8dSDavid Howells i, gfp); 283f3ddee8dSDavid Howells if (ret < 0) 284f3ddee8dSDavid Howells goto error; 285f3ddee8dSDavid Howells 286f3ddee8dSDavid Howells set_page_private(req->pages[i], 1); 287f3ddee8dSDavid Howells SetPagePrivate(req->pages[i]); 288f3ddee8dSDavid Howells unlock_page(req->pages[i]); 289f3ddee8dSDavid Howells i++; 290f3ddee8dSDavid Howells } else { 291f3ddee8dSDavid Howells i += n; 292f3ddee8dSDavid Howells } 293f3ddee8dSDavid Howells } while (i < req->nr_pages); 294f3ddee8dSDavid Howells 295f3ddee8dSDavid Howells /* If we're going to reload, we need to lock all the pages to prevent 296f3ddee8dSDavid Howells * races. 297f3ddee8dSDavid Howells */ 298f3ddee8dSDavid Howells ret = -ERESTARTSYS; 299b61f7dcfSDavid Howells if (down_read_killable(&dvnode->validate_lock) < 0) 300b61f7dcfSDavid Howells goto error; 301f3ddee8dSDavid Howells 302f3ddee8dSDavid Howells if (test_bit(AFS_VNODE_DIR_VALID, &dvnode->flags)) 303f3ddee8dSDavid Howells goto success; 304f3ddee8dSDavid Howells 305b61f7dcfSDavid Howells up_read(&dvnode->validate_lock); 306b61f7dcfSDavid Howells if (down_write_killable(&dvnode->validate_lock) < 0) 307b61f7dcfSDavid Howells goto error; 308b61f7dcfSDavid Howells 309b61f7dcfSDavid Howells if (!test_bit(AFS_VNODE_DIR_VALID, &dvnode->flags)) { 31099987c56SDavid Howells trace_afs_reload_dir(dvnode); 311f3ddee8dSDavid Howells ret = afs_fetch_data(dvnode, key, req); 312f3ddee8dSDavid Howells if (ret < 0) 313b61f7dcfSDavid Howells goto error_unlock; 314f3ddee8dSDavid Howells 315f3ddee8dSDavid Howells task_io_account_read(PAGE_SIZE * req->nr_pages); 316f3ddee8dSDavid Howells 317f3ddee8dSDavid Howells if (req->len < req->file_size) 318f3ddee8dSDavid Howells goto content_has_grown; 319f3ddee8dSDavid Howells 320f3ddee8dSDavid Howells /* Validate the data we just read. */ 321f3ddee8dSDavid Howells ret = -EIO; 322445b1028SDavid Howells if (!afs_dir_check_pages(dvnode, req)) 323b61f7dcfSDavid Howells goto error_unlock; 324f3ddee8dSDavid Howells 325f3ddee8dSDavid Howells // TODO: Trim excess pages 326f3ddee8dSDavid Howells 327f3ddee8dSDavid Howells set_bit(AFS_VNODE_DIR_VALID, &dvnode->flags); 328f3ddee8dSDavid Howells } 329f3ddee8dSDavid Howells 330b61f7dcfSDavid Howells downgrade_write(&dvnode->validate_lock); 331f3ddee8dSDavid Howells success: 332f3ddee8dSDavid Howells return req; 333f3ddee8dSDavid Howells 334f3ddee8dSDavid Howells error_unlock: 335b61f7dcfSDavid Howells up_write(&dvnode->validate_lock); 336f3ddee8dSDavid Howells error: 337f3ddee8dSDavid Howells afs_put_read(req); 338f3ddee8dSDavid Howells _leave(" = %d", ret); 339f3ddee8dSDavid Howells return ERR_PTR(ret); 340f3ddee8dSDavid Howells 341f3ddee8dSDavid Howells content_has_grown: 342b61f7dcfSDavid Howells up_write(&dvnode->validate_lock); 343f3ddee8dSDavid Howells afs_put_read(req); 344f3ddee8dSDavid Howells goto retry; 345f3ddee8dSDavid Howells } 346f3ddee8dSDavid Howells 347f3ddee8dSDavid Howells /* 3481da177e4SLinus Torvalds * deal with one block in an AFS directory 3491da177e4SLinus Torvalds */ 350f51375cdSDavid Howells static int afs_dir_iterate_block(struct afs_vnode *dvnode, 351f51375cdSDavid Howells struct dir_context *ctx, 35200317636SDavid Howells union afs_xdr_dir_block *block, 3531bbae9f8SAl Viro unsigned blkoff) 3541da177e4SLinus Torvalds { 35500317636SDavid Howells union afs_xdr_dirent *dire; 3561da177e4SLinus Torvalds unsigned offset, next, curr; 3571da177e4SLinus Torvalds size_t nlen; 3581bbae9f8SAl Viro int tmp; 3591da177e4SLinus Torvalds 3601bbae9f8SAl Viro _enter("%u,%x,%p,,",(unsigned)ctx->pos,blkoff,block); 3611da177e4SLinus Torvalds 36200317636SDavid Howells curr = (ctx->pos - blkoff) / sizeof(union afs_xdr_dirent); 3631da177e4SLinus Torvalds 3641da177e4SLinus Torvalds /* walk through the block, an entry at a time */ 3654ea219a8SDavid Howells for (offset = (blkoff == 0 ? AFS_DIR_RESV_BLOCKS0 : AFS_DIR_RESV_BLOCKS); 3664ea219a8SDavid Howells offset < AFS_DIR_SLOTS_PER_BLOCK; 3671da177e4SLinus Torvalds offset = next 3681da177e4SLinus Torvalds ) { 3691da177e4SLinus Torvalds next = offset + 1; 3701da177e4SLinus Torvalds 3711da177e4SLinus Torvalds /* skip entries marked unused in the bitmap */ 37200317636SDavid Howells if (!(block->hdr.bitmap[offset / 8] & 3731da177e4SLinus Torvalds (1 << (offset % 8)))) { 3745b5e0928SAlexey Dobriyan _debug("ENT[%zu.%u]: unused", 37500317636SDavid Howells blkoff / sizeof(union afs_xdr_dir_block), offset); 3761da177e4SLinus Torvalds if (offset >= curr) 3771bbae9f8SAl Viro ctx->pos = blkoff + 37800317636SDavid Howells next * sizeof(union afs_xdr_dirent); 3791da177e4SLinus Torvalds continue; 3801da177e4SLinus Torvalds } 3811da177e4SLinus Torvalds 3821da177e4SLinus Torvalds /* got a valid entry */ 3831da177e4SLinus Torvalds dire = &block->dirents[offset]; 3841da177e4SLinus Torvalds nlen = strnlen(dire->u.name, 3851da177e4SLinus Torvalds sizeof(*block) - 38600317636SDavid Howells offset * sizeof(union afs_xdr_dirent)); 3871da177e4SLinus Torvalds 3885b5e0928SAlexey Dobriyan _debug("ENT[%zu.%u]: %s %zu \"%s\"", 38900317636SDavid Howells blkoff / sizeof(union afs_xdr_dir_block), offset, 3901da177e4SLinus Torvalds (offset < curr ? "skip" : "fill"), 3911da177e4SLinus Torvalds nlen, dire->u.name); 3921da177e4SLinus Torvalds 3931da177e4SLinus Torvalds /* work out where the next possible entry is */ 39400317636SDavid Howells for (tmp = nlen; tmp > 15; tmp -= sizeof(union afs_xdr_dirent)) { 3954ea219a8SDavid Howells if (next >= AFS_DIR_SLOTS_PER_BLOCK) { 3965b5e0928SAlexey Dobriyan _debug("ENT[%zu.%u]:" 3971da177e4SLinus Torvalds " %u travelled beyond end dir block" 3985b5e0928SAlexey Dobriyan " (len %u/%zu)", 39900317636SDavid Howells blkoff / sizeof(union afs_xdr_dir_block), 4001da177e4SLinus Torvalds offset, next, tmp, nlen); 401f51375cdSDavid Howells return afs_bad(dvnode, afs_file_error_dir_over_end); 4021da177e4SLinus Torvalds } 40300317636SDavid Howells if (!(block->hdr.bitmap[next / 8] & 4041da177e4SLinus Torvalds (1 << (next % 8)))) { 4055b5e0928SAlexey Dobriyan _debug("ENT[%zu.%u]:" 4065b5e0928SAlexey Dobriyan " %u unmarked extension (len %u/%zu)", 40700317636SDavid Howells blkoff / sizeof(union afs_xdr_dir_block), 4081da177e4SLinus Torvalds offset, next, tmp, nlen); 409f51375cdSDavid Howells return afs_bad(dvnode, afs_file_error_dir_unmarked_ext); 4101da177e4SLinus Torvalds } 4111da177e4SLinus Torvalds 4125b5e0928SAlexey Dobriyan _debug("ENT[%zu.%u]: ext %u/%zu", 41300317636SDavid Howells blkoff / sizeof(union afs_xdr_dir_block), 4141da177e4SLinus Torvalds next, tmp, nlen); 4151da177e4SLinus Torvalds next++; 4161da177e4SLinus Torvalds } 4171da177e4SLinus Torvalds 4181da177e4SLinus Torvalds /* skip if starts before the current position */ 4191da177e4SLinus Torvalds if (offset < curr) 4201da177e4SLinus Torvalds continue; 4211da177e4SLinus Torvalds 4221da177e4SLinus Torvalds /* found the next entry */ 4231bbae9f8SAl Viro if (!dir_emit(ctx, dire->u.name, nlen, 4241da177e4SLinus Torvalds ntohl(dire->u.vnode), 4255cf9dd55SDavid Howells (ctx->actor == afs_lookup_filldir || 4265cf9dd55SDavid Howells ctx->actor == afs_lookup_one_filldir)? 4271bbae9f8SAl Viro ntohl(dire->u.unique) : DT_UNKNOWN)) { 4281da177e4SLinus Torvalds _leave(" = 0 [full]"); 4291da177e4SLinus Torvalds return 0; 4301da177e4SLinus Torvalds } 4311da177e4SLinus Torvalds 43200317636SDavid Howells ctx->pos = blkoff + next * sizeof(union afs_xdr_dirent); 4331da177e4SLinus Torvalds } 4341da177e4SLinus Torvalds 4351da177e4SLinus Torvalds _leave(" = 1 [more]"); 4361da177e4SLinus Torvalds return 1; 437ec26815aSDavid Howells } 4381da177e4SLinus Torvalds 4391da177e4SLinus Torvalds /* 44008e0e7c8SDavid Howells * iterate through the data blob that lists the contents of an AFS directory 4411da177e4SLinus Torvalds */ 4421bbae9f8SAl Viro static int afs_dir_iterate(struct inode *dir, struct dir_context *ctx, 4431bbae9f8SAl Viro struct key *key) 4441da177e4SLinus Torvalds { 445f3ddee8dSDavid Howells struct afs_vnode *dvnode = AFS_FS_I(dir); 44600317636SDavid Howells struct afs_xdr_dir_page *dbuf; 44700317636SDavid Howells union afs_xdr_dir_block *dblock; 448f3ddee8dSDavid Howells struct afs_read *req; 4491da177e4SLinus Torvalds struct page *page; 4501da177e4SLinus Torvalds unsigned blkoff, limit; 4511da177e4SLinus Torvalds int ret; 4521da177e4SLinus Torvalds 4531bbae9f8SAl Viro _enter("{%lu},%u,,", dir->i_ino, (unsigned)ctx->pos); 4541da177e4SLinus Torvalds 45508e0e7c8SDavid Howells if (test_bit(AFS_VNODE_DELETED, &AFS_FS_I(dir)->flags)) { 4561da177e4SLinus Torvalds _leave(" = -ESTALE"); 4571da177e4SLinus Torvalds return -ESTALE; 4581da177e4SLinus Torvalds } 4591da177e4SLinus Torvalds 460f3ddee8dSDavid Howells req = afs_read_dir(dvnode, key); 461f3ddee8dSDavid Howells if (IS_ERR(req)) 462f3ddee8dSDavid Howells return PTR_ERR(req); 463f3ddee8dSDavid Howells 4641da177e4SLinus Torvalds /* round the file position up to the next entry boundary */ 46500317636SDavid Howells ctx->pos += sizeof(union afs_xdr_dirent) - 1; 46600317636SDavid Howells ctx->pos &= ~(sizeof(union afs_xdr_dirent) - 1); 4671da177e4SLinus Torvalds 4681da177e4SLinus Torvalds /* walk through the blocks in sequence */ 4691da177e4SLinus Torvalds ret = 0; 470f3ddee8dSDavid Howells while (ctx->pos < req->actual_len) { 47100317636SDavid Howells blkoff = ctx->pos & ~(sizeof(union afs_xdr_dir_block) - 1); 4721da177e4SLinus Torvalds 473f3ddee8dSDavid Howells /* Fetch the appropriate page from the directory and re-add it 474f3ddee8dSDavid Howells * to the LRU. 475f3ddee8dSDavid Howells */ 476f3ddee8dSDavid Howells page = req->pages[blkoff / PAGE_SIZE]; 477f3ddee8dSDavid Howells if (!page) { 478f51375cdSDavid Howells ret = afs_bad(dvnode, afs_file_error_dir_missing_page); 4791da177e4SLinus Torvalds break; 4801da177e4SLinus Torvalds } 481f3ddee8dSDavid Howells mark_page_accessed(page); 4821da177e4SLinus Torvalds 4831da177e4SLinus Torvalds limit = blkoff & ~(PAGE_SIZE - 1); 4841da177e4SLinus Torvalds 485f3ddee8dSDavid Howells dbuf = kmap(page); 4861da177e4SLinus Torvalds 4871da177e4SLinus Torvalds /* deal with the individual blocks stashed on this page */ 4881da177e4SLinus Torvalds do { 4891da177e4SLinus Torvalds dblock = &dbuf->blocks[(blkoff % PAGE_SIZE) / 49000317636SDavid Howells sizeof(union afs_xdr_dir_block)]; 491f51375cdSDavid Howells ret = afs_dir_iterate_block(dvnode, ctx, dblock, blkoff); 4921da177e4SLinus Torvalds if (ret != 1) { 493f3ddee8dSDavid Howells kunmap(page); 4941da177e4SLinus Torvalds goto out; 4951da177e4SLinus Torvalds } 4961da177e4SLinus Torvalds 49700317636SDavid Howells blkoff += sizeof(union afs_xdr_dir_block); 4981da177e4SLinus Torvalds 4991bbae9f8SAl Viro } while (ctx->pos < dir->i_size && blkoff < limit); 5001da177e4SLinus Torvalds 501f3ddee8dSDavid Howells kunmap(page); 5021da177e4SLinus Torvalds ret = 0; 5031da177e4SLinus Torvalds } 5041da177e4SLinus Torvalds 5051da177e4SLinus Torvalds out: 506b61f7dcfSDavid Howells up_read(&dvnode->validate_lock); 507f3ddee8dSDavid Howells afs_put_read(req); 5081da177e4SLinus Torvalds _leave(" = %d", ret); 5091da177e4SLinus Torvalds return ret; 510ec26815aSDavid Howells } 5111da177e4SLinus Torvalds 5121da177e4SLinus Torvalds /* 5131da177e4SLinus Torvalds * read an AFS directory 5141da177e4SLinus Torvalds */ 5151bbae9f8SAl Viro static int afs_readdir(struct file *file, struct dir_context *ctx) 5161da177e4SLinus Torvalds { 517215804a9SDavid Howells return afs_dir_iterate(file_inode(file), ctx, afs_file_key(file)); 518ec26815aSDavid Howells } 5191da177e4SLinus Torvalds 5201da177e4SLinus Torvalds /* 5215cf9dd55SDavid Howells * Search the directory for a single name 5221da177e4SLinus Torvalds * - if afs_dir_iterate_block() spots this function, it'll pass the FID 5231da177e4SLinus Torvalds * uniquifier through dtype 5241da177e4SLinus Torvalds */ 5255cf9dd55SDavid Howells static int afs_lookup_one_filldir(struct dir_context *ctx, const char *name, 526ac7576f4SMiklos Szeredi int nlen, loff_t fpos, u64 ino, unsigned dtype) 5271da177e4SLinus Torvalds { 5285cf9dd55SDavid Howells struct afs_lookup_one_cookie *cookie = 5295cf9dd55SDavid Howells container_of(ctx, struct afs_lookup_one_cookie, ctx); 5301da177e4SLinus Torvalds 5311bbae9f8SAl Viro _enter("{%s,%u},%s,%u,,%llu,%u", 5321bbae9f8SAl Viro cookie->name.name, cookie->name.len, name, nlen, 533ba3e0e1aSDavid S. Miller (unsigned long long) ino, dtype); 5341da177e4SLinus Torvalds 53508e0e7c8SDavid Howells /* insanity checks first */ 53600317636SDavid Howells BUILD_BUG_ON(sizeof(union afs_xdr_dir_block) != 2048); 53700317636SDavid Howells BUILD_BUG_ON(sizeof(union afs_xdr_dirent) != 32); 53808e0e7c8SDavid Howells 5391bbae9f8SAl Viro if (cookie->name.len != nlen || 5401bbae9f8SAl Viro memcmp(cookie->name.name, name, nlen) != 0) { 5411da177e4SLinus Torvalds _leave(" = 0 [no]"); 5421da177e4SLinus Torvalds return 0; 5431da177e4SLinus Torvalds } 5441da177e4SLinus Torvalds 5451da177e4SLinus Torvalds cookie->fid.vnode = ino; 5461da177e4SLinus Torvalds cookie->fid.unique = dtype; 5471da177e4SLinus Torvalds cookie->found = 1; 5481da177e4SLinus Torvalds 5491da177e4SLinus Torvalds _leave(" = -1 [found]"); 5501da177e4SLinus Torvalds return -1; 551ec26815aSDavid Howells } 5521da177e4SLinus Torvalds 5531da177e4SLinus Torvalds /* 5545cf9dd55SDavid Howells * Do a lookup of a single name in a directory 555260a9803SDavid Howells * - just returns the FID the dentry name maps to if found 5561da177e4SLinus Torvalds */ 5575cf9dd55SDavid Howells static int afs_do_lookup_one(struct inode *dir, struct dentry *dentry, 55800d3b7a4SDavid Howells struct afs_fid *fid, struct key *key) 5591da177e4SLinus Torvalds { 5601bbae9f8SAl Viro struct afs_super_info *as = dir->i_sb->s_fs_info; 5615cf9dd55SDavid Howells struct afs_lookup_one_cookie cookie = { 5625cf9dd55SDavid Howells .ctx.actor = afs_lookup_one_filldir, 5631bbae9f8SAl Viro .name = dentry->d_name, 5641bbae9f8SAl Viro .fid.vid = as->volume->vid 5651bbae9f8SAl Viro }; 5661da177e4SLinus Torvalds int ret; 5671da177e4SLinus Torvalds 568a455589fSAl Viro _enter("{%lu},%p{%pd},", dir->i_ino, dentry, dentry); 5691da177e4SLinus Torvalds 5701da177e4SLinus Torvalds /* search the directory */ 5711bbae9f8SAl Viro ret = afs_dir_iterate(dir, &cookie.ctx, key); 5721da177e4SLinus Torvalds if (ret < 0) { 57308e0e7c8SDavid Howells _leave(" = %d [iter]", ret); 57408e0e7c8SDavid Howells return ret; 5751da177e4SLinus Torvalds } 5761da177e4SLinus Torvalds 5771da177e4SLinus Torvalds ret = -ENOENT; 5781da177e4SLinus Torvalds if (!cookie.found) { 57908e0e7c8SDavid Howells _leave(" = -ENOENT [not found]"); 58008e0e7c8SDavid Howells return -ENOENT; 58108e0e7c8SDavid Howells } 58208e0e7c8SDavid Howells 58308e0e7c8SDavid Howells *fid = cookie.fid; 5843b6492dfSDavid Howells _leave(" = 0 { vn=%llu u=%u }", fid->vnode, fid->unique); 58508e0e7c8SDavid Howells return 0; 58608e0e7c8SDavid Howells } 58708e0e7c8SDavid Howells 58808e0e7c8SDavid Howells /* 5895cf9dd55SDavid Howells * search the directory for a name 5905cf9dd55SDavid Howells * - if afs_dir_iterate_block() spots this function, it'll pass the FID 5915cf9dd55SDavid Howells * uniquifier through dtype 5925cf9dd55SDavid Howells */ 5935cf9dd55SDavid Howells static int afs_lookup_filldir(struct dir_context *ctx, const char *name, 5945cf9dd55SDavid Howells int nlen, loff_t fpos, u64 ino, unsigned dtype) 5955cf9dd55SDavid Howells { 5965cf9dd55SDavid Howells struct afs_lookup_cookie *cookie = 5975cf9dd55SDavid Howells container_of(ctx, struct afs_lookup_cookie, ctx); 5985cf9dd55SDavid Howells int ret; 5995cf9dd55SDavid Howells 6005cf9dd55SDavid Howells _enter("{%s,%u},%s,%u,,%llu,%u", 6015cf9dd55SDavid Howells cookie->name.name, cookie->name.len, name, nlen, 6025cf9dd55SDavid Howells (unsigned long long) ino, dtype); 6035cf9dd55SDavid Howells 6045cf9dd55SDavid Howells /* insanity checks first */ 60500317636SDavid Howells BUILD_BUG_ON(sizeof(union afs_xdr_dir_block) != 2048); 60600317636SDavid Howells BUILD_BUG_ON(sizeof(union afs_xdr_dirent) != 32); 6075cf9dd55SDavid Howells 6085cf9dd55SDavid Howells if (cookie->found) { 6095cf9dd55SDavid Howells if (cookie->nr_fids < 50) { 6105cf9dd55SDavid Howells cookie->fids[cookie->nr_fids].vnode = ino; 6115cf9dd55SDavid Howells cookie->fids[cookie->nr_fids].unique = dtype; 6125cf9dd55SDavid Howells cookie->nr_fids++; 6135cf9dd55SDavid Howells } 6145cf9dd55SDavid Howells } else if (cookie->name.len == nlen && 6155cf9dd55SDavid Howells memcmp(cookie->name.name, name, nlen) == 0) { 6165cf9dd55SDavid Howells cookie->fids[0].vnode = ino; 6175cf9dd55SDavid Howells cookie->fids[0].unique = dtype; 6185cf9dd55SDavid Howells cookie->found = 1; 6195cf9dd55SDavid Howells if (cookie->one_only) 6205cf9dd55SDavid Howells return -1; 6215cf9dd55SDavid Howells } 6225cf9dd55SDavid Howells 6235cf9dd55SDavid Howells ret = cookie->nr_fids >= 50 ? -1 : 0; 6245cf9dd55SDavid Howells _leave(" = %d", ret); 6255cf9dd55SDavid Howells return ret; 6265cf9dd55SDavid Howells } 6275cf9dd55SDavid Howells 6285cf9dd55SDavid Howells /* 6295cf9dd55SDavid Howells * Do a lookup in a directory. We make use of bulk lookup to query a slew of 6305cf9dd55SDavid Howells * files in one go and create inodes for them. The inode of the file we were 6315cf9dd55SDavid Howells * asked for is returned. 6325cf9dd55SDavid Howells */ 6335cf9dd55SDavid Howells static struct inode *afs_do_lookup(struct inode *dir, struct dentry *dentry, 6345cf9dd55SDavid Howells struct key *key) 6355cf9dd55SDavid Howells { 6365cf9dd55SDavid Howells struct afs_lookup_cookie *cookie; 637f642404aSDavid Howells struct afs_cb_interest *dcbi, *cbi = NULL; 6385cf9dd55SDavid Howells struct afs_super_info *as = dir->i_sb->s_fs_info; 63987182759SDavid Howells struct afs_status_cb *scb; 640b8359153SDavid Howells struct afs_iget_data iget_data; 6415cf9dd55SDavid Howells struct afs_fs_cursor fc; 642f642404aSDavid Howells struct afs_server *server; 64339db9815SDavid Howells struct afs_vnode *dvnode = AFS_FS_I(dir), *vnode; 64439db9815SDavid Howells struct inode *inode = NULL, *ti; 6455cf9dd55SDavid Howells int ret, i; 6465cf9dd55SDavid Howells 6475cf9dd55SDavid Howells _enter("{%lu},%p{%pd},", dir->i_ino, dentry, dentry); 6485cf9dd55SDavid Howells 6495cf9dd55SDavid Howells cookie = kzalloc(sizeof(struct afs_lookup_cookie), GFP_KERNEL); 6505cf9dd55SDavid Howells if (!cookie) 6515cf9dd55SDavid Howells return ERR_PTR(-ENOMEM); 6525cf9dd55SDavid Howells 6535cf9dd55SDavid Howells cookie->ctx.actor = afs_lookup_filldir; 6545cf9dd55SDavid Howells cookie->name = dentry->d_name; 6555cf9dd55SDavid Howells cookie->nr_fids = 1; /* slot 0 is saved for the fid we actually want */ 6565cf9dd55SDavid Howells 6575cf9dd55SDavid Howells read_seqlock_excl(&dvnode->cb_lock); 658f642404aSDavid Howells dcbi = rcu_dereference_protected(dvnode->cb_interest, 659f642404aSDavid Howells lockdep_is_held(&dvnode->cb_lock.lock)); 660f642404aSDavid Howells if (dcbi) { 661f642404aSDavid Howells server = dcbi->server; 662f642404aSDavid Howells if (server && 663f642404aSDavid Howells test_bit(AFS_SERVER_FL_NO_IBULK, &server->flags)) 6645cf9dd55SDavid Howells cookie->one_only = true; 665f642404aSDavid Howells } 6665cf9dd55SDavid Howells read_sequnlock_excl(&dvnode->cb_lock); 6675cf9dd55SDavid Howells 6685cf9dd55SDavid Howells for (i = 0; i < 50; i++) 6695cf9dd55SDavid Howells cookie->fids[i].vid = as->volume->vid; 6705cf9dd55SDavid Howells 6715cf9dd55SDavid Howells /* search the directory */ 6725cf9dd55SDavid Howells ret = afs_dir_iterate(dir, &cookie->ctx, key); 6735cf9dd55SDavid Howells if (ret < 0) { 6745cf9dd55SDavid Howells inode = ERR_PTR(ret); 6755cf9dd55SDavid Howells goto out; 6765cf9dd55SDavid Howells } 6775cf9dd55SDavid Howells 6785cf9dd55SDavid Howells inode = ERR_PTR(-ENOENT); 6795cf9dd55SDavid Howells if (!cookie->found) 6805cf9dd55SDavid Howells goto out; 6815cf9dd55SDavid Howells 6825cf9dd55SDavid Howells /* Check to see if we already have an inode for the primary fid. */ 683b8359153SDavid Howells iget_data.fid = cookie->fids[0]; 684b8359153SDavid Howells iget_data.volume = dvnode->volume; 685b8359153SDavid Howells iget_data.cb_v_break = dvnode->volume->cb_v_break; 686b8359153SDavid Howells iget_data.cb_s_break = 0; 687b8359153SDavid Howells inode = ilookup5(dir->i_sb, cookie->fids[0].vnode, 688b8359153SDavid Howells afs_iget5_test, &iget_data); 6895cf9dd55SDavid Howells if (inode) 6905cf9dd55SDavid Howells goto out; 6915cf9dd55SDavid Howells 6925cf9dd55SDavid Howells /* Need space for examining all the selected files */ 6935cf9dd55SDavid Howells inode = ERR_PTR(-ENOMEM); 69487182759SDavid Howells cookie->statuses = kvcalloc(cookie->nr_fids, sizeof(struct afs_status_cb), 6955cf9dd55SDavid Howells GFP_KERNEL); 6965cf9dd55SDavid Howells if (!cookie->statuses) 6975cf9dd55SDavid Howells goto out; 6985cf9dd55SDavid Howells 69939db9815SDavid Howells cookie->inodes = kcalloc(cookie->nr_fids, sizeof(struct inode *), 70039db9815SDavid Howells GFP_KERNEL); 70139db9815SDavid Howells if (!cookie->inodes) 70239db9815SDavid Howells goto out_s; 70339db9815SDavid Howells 70439db9815SDavid Howells for (i = 1; i < cookie->nr_fids; i++) { 70539db9815SDavid Howells scb = &cookie->statuses[i]; 70639db9815SDavid Howells 70739db9815SDavid Howells /* Find any inodes that already exist and get their 70839db9815SDavid Howells * callback counters. 70939db9815SDavid Howells */ 71039db9815SDavid Howells iget_data.fid = cookie->fids[i]; 71139db9815SDavid Howells ti = ilookup5_nowait(dir->i_sb, iget_data.fid.vnode, 71239db9815SDavid Howells afs_iget5_test, &iget_data); 71339db9815SDavid Howells if (!IS_ERR_OR_NULL(ti)) { 71439db9815SDavid Howells vnode = AFS_FS_I(ti); 71539db9815SDavid Howells scb->cb_break = afs_calc_vnode_cb_break(vnode); 71639db9815SDavid Howells cookie->inodes[i] = ti; 71739db9815SDavid Howells } 71839db9815SDavid Howells } 71939db9815SDavid Howells 7205cf9dd55SDavid Howells /* Try FS.InlineBulkStatus first. Abort codes for the individual 7215cf9dd55SDavid Howells * lookups contained therein are stored in the reply without aborting 7225cf9dd55SDavid Howells * the whole operation. 7235cf9dd55SDavid Howells */ 7245cf9dd55SDavid Howells if (cookie->one_only) 7255cf9dd55SDavid Howells goto no_inline_bulk_status; 7265cf9dd55SDavid Howells 7275cf9dd55SDavid Howells inode = ERR_PTR(-ERESTARTSYS); 72820b8391fSDavid Howells if (afs_begin_vnode_operation(&fc, dvnode, key, true)) { 7295cf9dd55SDavid Howells while (afs_select_fileserver(&fc)) { 7305cf9dd55SDavid Howells if (test_bit(AFS_SERVER_FL_NO_IBULK, 7315cf9dd55SDavid Howells &fc.cbi->server->flags)) { 7325cf9dd55SDavid Howells fc.ac.abort_code = RX_INVALID_OPERATION; 7335cf9dd55SDavid Howells fc.ac.error = -ECONNABORTED; 7345cf9dd55SDavid Howells break; 7355cf9dd55SDavid Howells } 736b8359153SDavid Howells iget_data.cb_v_break = dvnode->volume->cb_v_break; 737b8359153SDavid Howells iget_data.cb_s_break = fc.cbi->server->cb_s_break; 7385cf9dd55SDavid Howells afs_fs_inline_bulk_status(&fc, 7395cf9dd55SDavid Howells afs_v2net(dvnode), 7405cf9dd55SDavid Howells cookie->fids, 7415cf9dd55SDavid Howells cookie->statuses, 7425cf9dd55SDavid Howells cookie->nr_fids, NULL); 7435cf9dd55SDavid Howells } 7445cf9dd55SDavid Howells 7455cf9dd55SDavid Howells if (fc.ac.error == 0) 7465cf9dd55SDavid Howells cbi = afs_get_cb_interest(fc.cbi); 7475cf9dd55SDavid Howells if (fc.ac.abort_code == RX_INVALID_OPERATION) 7485cf9dd55SDavid Howells set_bit(AFS_SERVER_FL_NO_IBULK, &fc.cbi->server->flags); 7495cf9dd55SDavid Howells inode = ERR_PTR(afs_end_vnode_operation(&fc)); 7505cf9dd55SDavid Howells } 7515cf9dd55SDavid Howells 7525cf9dd55SDavid Howells if (!IS_ERR(inode)) 7535cf9dd55SDavid Howells goto success; 7545cf9dd55SDavid Howells if (fc.ac.abort_code != RX_INVALID_OPERATION) 7555cf9dd55SDavid Howells goto out_c; 7565cf9dd55SDavid Howells 7575cf9dd55SDavid Howells no_inline_bulk_status: 7585cf9dd55SDavid Howells /* We could try FS.BulkStatus next, but this aborts the entire op if 7595cf9dd55SDavid Howells * any of the lookups fails - so, for the moment, revert to 7605cf9dd55SDavid Howells * FS.FetchStatus for just the primary fid. 7615cf9dd55SDavid Howells */ 7625cf9dd55SDavid Howells inode = ERR_PTR(-ERESTARTSYS); 76320b8391fSDavid Howells if (afs_begin_vnode_operation(&fc, dvnode, key, true)) { 7645cf9dd55SDavid Howells while (afs_select_fileserver(&fc)) { 765b8359153SDavid Howells iget_data.cb_v_break = dvnode->volume->cb_v_break; 766b8359153SDavid Howells iget_data.cb_s_break = fc.cbi->server->cb_s_break; 76787182759SDavid Howells scb = &cookie->statuses[0]; 7685cf9dd55SDavid Howells afs_fs_fetch_status(&fc, 7695cf9dd55SDavid Howells afs_v2net(dvnode), 7705cf9dd55SDavid Howells cookie->fids, 771a58823acSDavid Howells scb, 7725cf9dd55SDavid Howells NULL); 7735cf9dd55SDavid Howells } 7745cf9dd55SDavid Howells 7755cf9dd55SDavid Howells if (fc.ac.error == 0) 7765cf9dd55SDavid Howells cbi = afs_get_cb_interest(fc.cbi); 7775cf9dd55SDavid Howells inode = ERR_PTR(afs_end_vnode_operation(&fc)); 7785cf9dd55SDavid Howells } 7795cf9dd55SDavid Howells 7805cf9dd55SDavid Howells if (IS_ERR(inode)) 7815cf9dd55SDavid Howells goto out_c; 7825cf9dd55SDavid Howells 7835cf9dd55SDavid Howells success: 7845cf9dd55SDavid Howells /* Turn all the files into inodes and save the first one - which is the 7855cf9dd55SDavid Howells * one we actually want. 7865cf9dd55SDavid Howells */ 78787182759SDavid Howells scb = &cookie->statuses[0]; 78887182759SDavid Howells if (scb->status.abort_code != 0) 78987182759SDavid Howells inode = ERR_PTR(afs_abort_to_error(scb->status.abort_code)); 7905cf9dd55SDavid Howells 7915cf9dd55SDavid Howells for (i = 0; i < cookie->nr_fids; i++) { 79287182759SDavid Howells struct afs_status_cb *scb = &cookie->statuses[i]; 79339db9815SDavid Howells 79439db9815SDavid Howells if (!scb->have_status && !scb->have_error) 79539db9815SDavid Howells continue; 79639db9815SDavid Howells 79739db9815SDavid Howells if (cookie->inodes[i]) { 79839db9815SDavid Howells afs_vnode_commit_status(&fc, AFS_FS_I(cookie->inodes[i]), 79939db9815SDavid Howells scb->cb_break, NULL, scb); 80039db9815SDavid Howells continue; 80139db9815SDavid Howells } 8025cf9dd55SDavid Howells 80387182759SDavid Howells if (scb->status.abort_code != 0) 8045cf9dd55SDavid Howells continue; 8055cf9dd55SDavid Howells 806b8359153SDavid Howells iget_data.fid = cookie->fids[i]; 807b8359153SDavid Howells ti = afs_iget(dir->i_sb, key, &iget_data, scb, cbi, dvnode); 80839db9815SDavid Howells if (!IS_ERR(ti)) 80939db9815SDavid Howells afs_cache_permit(AFS_FS_I(ti), key, 81039db9815SDavid Howells 0 /* Assume vnode->cb_break is 0 */ + 81139db9815SDavid Howells iget_data.cb_v_break, 81239db9815SDavid Howells scb); 8135cf9dd55SDavid Howells if (i == 0) { 8145cf9dd55SDavid Howells inode = ti; 8155cf9dd55SDavid Howells } else { 8165cf9dd55SDavid Howells if (!IS_ERR(ti)) 8175cf9dd55SDavid Howells iput(ti); 8185cf9dd55SDavid Howells } 8195cf9dd55SDavid Howells } 8205cf9dd55SDavid Howells 8215cf9dd55SDavid Howells out_c: 8225cf9dd55SDavid Howells afs_put_cb_interest(afs_v2net(dvnode), cbi); 82339db9815SDavid Howells if (cookie->inodes) { 82439db9815SDavid Howells for (i = 0; i < cookie->nr_fids; i++) 82539db9815SDavid Howells iput(cookie->inodes[i]); 82639db9815SDavid Howells kfree(cookie->inodes); 82739db9815SDavid Howells } 82839db9815SDavid Howells out_s: 82987182759SDavid Howells kvfree(cookie->statuses); 8305cf9dd55SDavid Howells out: 8315cf9dd55SDavid Howells kfree(cookie); 8325cf9dd55SDavid Howells return inode; 8335cf9dd55SDavid Howells } 8345cf9dd55SDavid Howells 8355cf9dd55SDavid Howells /* 8366f8880d8SDavid Howells * Look up an entry in a directory with @sys substitution. 8376f8880d8SDavid Howells */ 8386f8880d8SDavid Howells static struct dentry *afs_lookup_atsys(struct inode *dir, struct dentry *dentry, 8396f8880d8SDavid Howells struct key *key) 8406f8880d8SDavid Howells { 8416f8880d8SDavid Howells struct afs_sysnames *subs; 8426f8880d8SDavid Howells struct afs_net *net = afs_i2net(dir); 8436f8880d8SDavid Howells struct dentry *ret; 8446f8880d8SDavid Howells char *buf, *p, *name; 8456f8880d8SDavid Howells int len, i; 8466f8880d8SDavid Howells 8476f8880d8SDavid Howells _enter(""); 8486f8880d8SDavid Howells 8496f8880d8SDavid Howells ret = ERR_PTR(-ENOMEM); 8506f8880d8SDavid Howells p = buf = kmalloc(AFSNAMEMAX, GFP_KERNEL); 8516f8880d8SDavid Howells if (!buf) 8526f8880d8SDavid Howells goto out_p; 8536f8880d8SDavid Howells if (dentry->d_name.len > 4) { 8546f8880d8SDavid Howells memcpy(p, dentry->d_name.name, dentry->d_name.len - 4); 8556f8880d8SDavid Howells p += dentry->d_name.len - 4; 8566f8880d8SDavid Howells } 8576f8880d8SDavid Howells 8586f8880d8SDavid Howells /* There is an ordered list of substitutes that we have to try. */ 8596f8880d8SDavid Howells read_lock(&net->sysnames_lock); 8606f8880d8SDavid Howells subs = net->sysnames; 8616f8880d8SDavid Howells refcount_inc(&subs->usage); 8626f8880d8SDavid Howells read_unlock(&net->sysnames_lock); 8636f8880d8SDavid Howells 8646f8880d8SDavid Howells for (i = 0; i < subs->nr; i++) { 8656f8880d8SDavid Howells name = subs->subs[i]; 8666f8880d8SDavid Howells len = dentry->d_name.len - 4 + strlen(name); 8676f8880d8SDavid Howells if (len >= AFSNAMEMAX) { 8686f8880d8SDavid Howells ret = ERR_PTR(-ENAMETOOLONG); 8696f8880d8SDavid Howells goto out_s; 8706f8880d8SDavid Howells } 8716f8880d8SDavid Howells 8726f8880d8SDavid Howells strcpy(p, name); 8736f8880d8SDavid Howells ret = lookup_one_len(buf, dentry->d_parent, len); 8746f8880d8SDavid Howells if (IS_ERR(ret) || d_is_positive(ret)) 8756f8880d8SDavid Howells goto out_s; 8766f8880d8SDavid Howells dput(ret); 8776f8880d8SDavid Howells } 8786f8880d8SDavid Howells 8796f8880d8SDavid Howells /* We don't want to d_add() the @sys dentry here as we don't want to 8806f8880d8SDavid Howells * the cached dentry to hide changes to the sysnames list. 8816f8880d8SDavid Howells */ 8826f8880d8SDavid Howells ret = NULL; 8836f8880d8SDavid Howells out_s: 8846f8880d8SDavid Howells afs_put_sysnames(subs); 8856f8880d8SDavid Howells kfree(buf); 8866f8880d8SDavid Howells out_p: 8876f8880d8SDavid Howells key_put(key); 8886f8880d8SDavid Howells return ret; 8896f8880d8SDavid Howells } 8906f8880d8SDavid Howells 8916f8880d8SDavid Howells /* 89208e0e7c8SDavid Howells * look up an entry in a directory 89308e0e7c8SDavid Howells */ 894260a9803SDavid Howells static struct dentry *afs_lookup(struct inode *dir, struct dentry *dentry, 89500cd8dd3SAl Viro unsigned int flags) 89608e0e7c8SDavid Howells { 8975cf9dd55SDavid Howells struct afs_vnode *dvnode = AFS_FS_I(dir); 89808e0e7c8SDavid Howells struct inode *inode; 89934b2a88fSAl Viro struct dentry *d; 90000d3b7a4SDavid Howells struct key *key; 90108e0e7c8SDavid Howells int ret; 90208e0e7c8SDavid Howells 9033b6492dfSDavid Howells _enter("{%llx:%llu},%p{%pd},", 9045cf9dd55SDavid Howells dvnode->fid.vid, dvnode->fid.vnode, dentry, dentry); 905260a9803SDavid Howells 9062b0143b5SDavid Howells ASSERTCMP(d_inode(dentry), ==, NULL); 90708e0e7c8SDavid Howells 90845222b9eSDavid Howells if (dentry->d_name.len >= AFSNAMEMAX) { 90908e0e7c8SDavid Howells _leave(" = -ENAMETOOLONG"); 91008e0e7c8SDavid Howells return ERR_PTR(-ENAMETOOLONG); 91108e0e7c8SDavid Howells } 91208e0e7c8SDavid Howells 9135cf9dd55SDavid Howells if (test_bit(AFS_VNODE_DELETED, &dvnode->flags)) { 91408e0e7c8SDavid Howells _leave(" = -ESTALE"); 91508e0e7c8SDavid Howells return ERR_PTR(-ESTALE); 91608e0e7c8SDavid Howells } 91708e0e7c8SDavid Howells 9185cf9dd55SDavid Howells key = afs_request_key(dvnode->volume->cell); 91900d3b7a4SDavid Howells if (IS_ERR(key)) { 92000d3b7a4SDavid Howells _leave(" = %ld [key]", PTR_ERR(key)); 921e231c2eeSDavid Howells return ERR_CAST(key); 92200d3b7a4SDavid Howells } 92300d3b7a4SDavid Howells 9245cf9dd55SDavid Howells ret = afs_validate(dvnode, key); 92508e0e7c8SDavid Howells if (ret < 0) { 92600d3b7a4SDavid Howells key_put(key); 927260a9803SDavid Howells _leave(" = %d [val]", ret); 9281da177e4SLinus Torvalds return ERR_PTR(ret); 9291da177e4SLinus Torvalds } 9301da177e4SLinus Torvalds 9316f8880d8SDavid Howells if (dentry->d_name.len >= 4 && 9326f8880d8SDavid Howells dentry->d_name.name[dentry->d_name.len - 4] == '@' && 9336f8880d8SDavid Howells dentry->d_name.name[dentry->d_name.len - 3] == 's' && 9346f8880d8SDavid Howells dentry->d_name.name[dentry->d_name.len - 2] == 'y' && 9356f8880d8SDavid Howells dentry->d_name.name[dentry->d_name.len - 1] == 's') 9366f8880d8SDavid Howells return afs_lookup_atsys(dir, dentry, key); 9376f8880d8SDavid Howells 938d55b4da4SDavid Howells afs_stat_v(dvnode, n_lookup); 9395cf9dd55SDavid Howells inode = afs_do_lookup(dir, dentry, key); 94034b2a88fSAl Viro key_put(key); 94134b2a88fSAl Viro if (inode == ERR_PTR(-ENOENT)) { 9425cf9dd55SDavid Howells inode = afs_try_auto_mntpt(dentry, dir); 94334b2a88fSAl Viro } else { 94434b2a88fSAl Viro dentry->d_fsdata = 94534b2a88fSAl Viro (void *)(unsigned long)dvnode->status.data_version; 946bec5eb61Swanglei } 94734b2a88fSAl Viro d = d_splice_alias(inode, dentry); 94880548b03SDavid Howells if (!IS_ERR_OR_NULL(d)) { 94934b2a88fSAl Viro d->d_fsdata = dentry->d_fsdata; 95080548b03SDavid Howells trace_afs_lookup(dvnode, &d->d_name, 95180548b03SDavid Howells inode ? AFS_FS_I(inode) : NULL); 95280548b03SDavid Howells } else { 95380548b03SDavid Howells trace_afs_lookup(dvnode, &dentry->d_name, 95480548b03SDavid Howells inode ? AFS_FS_I(inode) : NULL); 95580548b03SDavid Howells } 95634b2a88fSAl Viro return d; 957ec26815aSDavid Howells } 9581da177e4SLinus Torvalds 9591da177e4SLinus Torvalds /* 9601da177e4SLinus Torvalds * check that a dentry lookup hit has found a valid entry 9611da177e4SLinus Torvalds * - NOTE! the hit can be a negative hit too, so we can't assume we have an 9621da177e4SLinus Torvalds * inode 9631da177e4SLinus Torvalds */ 9640b728e19SAl Viro static int afs_d_revalidate(struct dentry *dentry, unsigned int flags) 9651da177e4SLinus Torvalds { 966260a9803SDavid Howells struct afs_vnode *vnode, *dir; 967dd0d9a46SArtem Bityutskiy struct afs_fid uninitialized_var(fid); 9681da177e4SLinus Torvalds struct dentry *parent; 969c435ee34SDavid Howells struct inode *inode; 97000d3b7a4SDavid Howells struct key *key; 971a4ff7401SDavid Howells long dir_version, de_version; 9721da177e4SLinus Torvalds int ret; 9731da177e4SLinus Torvalds 9740b728e19SAl Viro if (flags & LOOKUP_RCU) 97534286d66SNick Piggin return -ECHILD; 97634286d66SNick Piggin 977c435ee34SDavid Howells if (d_really_is_positive(dentry)) { 9782b0143b5SDavid Howells vnode = AFS_FS_I(d_inode(dentry)); 9793b6492dfSDavid Howells _enter("{v={%llx:%llu} n=%pd fl=%lx},", 980a455589fSAl Viro vnode->fid.vid, vnode->fid.vnode, dentry, 981260a9803SDavid Howells vnode->flags); 982c435ee34SDavid Howells } else { 983a455589fSAl Viro _enter("{neg n=%pd}", dentry); 984c435ee34SDavid Howells } 9851da177e4SLinus Torvalds 986260a9803SDavid Howells key = afs_request_key(AFS_FS_S(dentry->d_sb)->volume->cell); 98700d3b7a4SDavid Howells if (IS_ERR(key)) 98800d3b7a4SDavid Howells key = NULL; 98900d3b7a4SDavid Howells 990c435ee34SDavid Howells if (d_really_is_positive(dentry)) { 991c435ee34SDavid Howells inode = d_inode(dentry); 992c435ee34SDavid Howells if (inode) { 993c435ee34SDavid Howells vnode = AFS_FS_I(inode); 994c435ee34SDavid Howells afs_validate(vnode, key); 995c435ee34SDavid Howells if (test_bit(AFS_VNODE_DELETED, &vnode->flags)) 996c435ee34SDavid Howells goto out_bad; 997c435ee34SDavid Howells } 998c435ee34SDavid Howells } 999c435ee34SDavid Howells 10001da177e4SLinus Torvalds /* lock down the parent dentry so we can peer at it */ 100108e0e7c8SDavid Howells parent = dget_parent(dentry); 10022b0143b5SDavid Howells dir = AFS_FS_I(d_inode(parent)); 10031da177e4SLinus Torvalds 1004260a9803SDavid Howells /* validate the parent directory */ 1005260a9803SDavid Howells afs_validate(dir, key); 1006260a9803SDavid Howells 1007260a9803SDavid Howells if (test_bit(AFS_VNODE_DELETED, &dir->flags)) { 1008a455589fSAl Viro _debug("%pd: parent dir deleted", dentry); 1009c435ee34SDavid Howells goto out_bad_parent; 10101da177e4SLinus Torvalds } 10111da177e4SLinus Torvalds 1012a4ff7401SDavid Howells /* We only need to invalidate a dentry if the server's copy changed 1013a4ff7401SDavid Howells * behind our back. If we made the change, it's no problem. Note that 1014a4ff7401SDavid Howells * on a 32-bit system, we only have 32 bits in the dentry to store the 1015a4ff7401SDavid Howells * version. 1016a4ff7401SDavid Howells */ 1017a4ff7401SDavid Howells dir_version = (long)dir->status.data_version; 1018a4ff7401SDavid Howells de_version = (long)dentry->d_fsdata; 1019a4ff7401SDavid Howells if (de_version == dir_version) 10205dc84855SDavid Howells goto out_valid_noupdate; 1021a4ff7401SDavid Howells 1022a4ff7401SDavid Howells dir_version = (long)dir->invalid_before; 1023a4ff7401SDavid Howells if (de_version - dir_version >= 0) 1024a4ff7401SDavid Howells goto out_valid; 1025260a9803SDavid Howells 102608e0e7c8SDavid Howells _debug("dir modified"); 1027d55b4da4SDavid Howells afs_stat_v(dir, n_reval); 10281da177e4SLinus Torvalds 10291da177e4SLinus Torvalds /* search the directory for this vnode */ 10305cf9dd55SDavid Howells ret = afs_do_lookup_one(&dir->vfs_inode, dentry, &fid, key); 1031260a9803SDavid Howells switch (ret) { 1032260a9803SDavid Howells case 0: 1033260a9803SDavid Howells /* the filename maps to something */ 10342b0143b5SDavid Howells if (d_really_is_negative(dentry)) 1035c435ee34SDavid Howells goto out_bad_parent; 1036c435ee34SDavid Howells inode = d_inode(dentry); 1037c435ee34SDavid Howells if (is_bad_inode(inode)) { 1038a455589fSAl Viro printk("kAFS: afs_d_revalidate: %pd2 has bad inode\n", 1039a455589fSAl Viro dentry); 1040c435ee34SDavid Howells goto out_bad_parent; 10411da177e4SLinus Torvalds } 10421da177e4SLinus Torvalds 1043c435ee34SDavid Howells vnode = AFS_FS_I(inode); 1044c435ee34SDavid Howells 10451da177e4SLinus Torvalds /* if the vnode ID has changed, then the dirent points to a 10461da177e4SLinus Torvalds * different file */ 104708e0e7c8SDavid Howells if (fid.vnode != vnode->fid.vnode) { 10483b6492dfSDavid Howells _debug("%pd: dirent changed [%llu != %llu]", 1049a455589fSAl Viro dentry, fid.vnode, 105008e0e7c8SDavid Howells vnode->fid.vnode); 10511da177e4SLinus Torvalds goto not_found; 10521da177e4SLinus Torvalds } 10531da177e4SLinus Torvalds 10541da177e4SLinus Torvalds /* if the vnode ID uniqifier has changed, then the file has 1055260a9803SDavid Howells * been deleted and replaced, and the original vnode ID has 1056260a9803SDavid Howells * been reused */ 105708e0e7c8SDavid Howells if (fid.unique != vnode->fid.unique) { 1058a455589fSAl Viro _debug("%pd: file deleted (uq %u -> %u I:%u)", 1059a455589fSAl Viro dentry, fid.unique, 10607a224228SJean Noel Cordenner vnode->fid.unique, 1061c435ee34SDavid Howells vnode->vfs_inode.i_generation); 1062c435ee34SDavid Howells write_seqlock(&vnode->cb_lock); 106308e0e7c8SDavid Howells set_bit(AFS_VNODE_DELETED, &vnode->flags); 1064c435ee34SDavid Howells write_sequnlock(&vnode->cb_lock); 1065260a9803SDavid Howells goto not_found; 1066260a9803SDavid Howells } 1067260a9803SDavid Howells goto out_valid; 1068260a9803SDavid Howells 1069260a9803SDavid Howells case -ENOENT: 1070260a9803SDavid Howells /* the filename is unknown */ 1071a455589fSAl Viro _debug("%pd: dirent not found", dentry); 10722b0143b5SDavid Howells if (d_really_is_positive(dentry)) 1073260a9803SDavid Howells goto not_found; 1074260a9803SDavid Howells goto out_valid; 1075260a9803SDavid Howells 1076260a9803SDavid Howells default: 1077a455589fSAl Viro _debug("failed to iterate dir %pd: %d", 1078a455589fSAl Viro parent, ret); 1079c435ee34SDavid Howells goto out_bad_parent; 10801da177e4SLinus Torvalds } 108108e0e7c8SDavid Howells 10821da177e4SLinus Torvalds out_valid: 1083a4ff7401SDavid Howells dentry->d_fsdata = (void *)dir_version; 10845dc84855SDavid Howells out_valid_noupdate: 10851da177e4SLinus Torvalds dput(parent); 108600d3b7a4SDavid Howells key_put(key); 10871da177e4SLinus Torvalds _leave(" = 1 [valid]"); 10881da177e4SLinus Torvalds return 1; 10891da177e4SLinus Torvalds 10901da177e4SLinus Torvalds /* the dirent, if it exists, now points to a different vnode */ 10911da177e4SLinus Torvalds not_found: 10921da177e4SLinus Torvalds spin_lock(&dentry->d_lock); 10931da177e4SLinus Torvalds dentry->d_flags |= DCACHE_NFSFS_RENAMED; 10941da177e4SLinus Torvalds spin_unlock(&dentry->d_lock); 10951da177e4SLinus Torvalds 1096c435ee34SDavid Howells out_bad_parent: 1097a455589fSAl Viro _debug("dropping dentry %pd2", dentry); 10981da177e4SLinus Torvalds dput(parent); 1099c435ee34SDavid Howells out_bad: 110000d3b7a4SDavid Howells key_put(key); 11011da177e4SLinus Torvalds 11021da177e4SLinus Torvalds _leave(" = 0 [bad]"); 11031da177e4SLinus Torvalds return 0; 1104ec26815aSDavid Howells } 11051da177e4SLinus Torvalds 11061da177e4SLinus Torvalds /* 11071da177e4SLinus Torvalds * allow the VFS to enquire as to whether a dentry should be unhashed (mustn't 11081da177e4SLinus Torvalds * sleep) 11091da177e4SLinus Torvalds * - called from dput() when d_count is going to 0. 11101da177e4SLinus Torvalds * - return 1 to request dentry be unhashed, 0 otherwise 11111da177e4SLinus Torvalds */ 1112fe15ce44SNick Piggin static int afs_d_delete(const struct dentry *dentry) 11131da177e4SLinus Torvalds { 1114a455589fSAl Viro _enter("%pd", dentry); 11151da177e4SLinus Torvalds 11161da177e4SLinus Torvalds if (dentry->d_flags & DCACHE_NFSFS_RENAMED) 11171da177e4SLinus Torvalds goto zap; 11181da177e4SLinus Torvalds 11192b0143b5SDavid Howells if (d_really_is_positive(dentry) && 11202b0143b5SDavid Howells (test_bit(AFS_VNODE_DELETED, &AFS_FS_I(d_inode(dentry))->flags) || 11212b0143b5SDavid Howells test_bit(AFS_VNODE_PSEUDODIR, &AFS_FS_I(d_inode(dentry))->flags))) 11221da177e4SLinus Torvalds goto zap; 11231da177e4SLinus Torvalds 11241da177e4SLinus Torvalds _leave(" = 0 [keep]"); 11251da177e4SLinus Torvalds return 0; 11261da177e4SLinus Torvalds 11271da177e4SLinus Torvalds zap: 11281da177e4SLinus Torvalds _leave(" = 1 [zap]"); 11291da177e4SLinus Torvalds return 1; 1130ec26815aSDavid Howells } 1131260a9803SDavid Howells 1132260a9803SDavid Howells /* 113379ddbfa5SDavid Howells * Clean up sillyrename files on dentry removal. 113479ddbfa5SDavid Howells */ 113579ddbfa5SDavid Howells static void afs_d_iput(struct dentry *dentry, struct inode *inode) 113679ddbfa5SDavid Howells { 113779ddbfa5SDavid Howells if (dentry->d_flags & DCACHE_NFSFS_RENAMED) 113879ddbfa5SDavid Howells afs_silly_iput(dentry, inode); 113979ddbfa5SDavid Howells iput(inode); 114079ddbfa5SDavid Howells } 114179ddbfa5SDavid Howells 114279ddbfa5SDavid Howells /* 1143260a9803SDavid Howells * handle dentry release 1144260a9803SDavid Howells */ 114566c7e1d3SDavid Howells void afs_d_release(struct dentry *dentry) 1146260a9803SDavid Howells { 1147a455589fSAl Viro _enter("%pd", dentry); 1148260a9803SDavid Howells } 1149260a9803SDavid Howells 1150260a9803SDavid Howells /* 1151d2ddc776SDavid Howells * Create a new inode for create/mkdir/symlink 1152d2ddc776SDavid Howells */ 1153d2ddc776SDavid Howells static void afs_vnode_new_inode(struct afs_fs_cursor *fc, 1154d2ddc776SDavid Howells struct dentry *new_dentry, 1155b8359153SDavid Howells struct afs_iget_data *new_data, 1156a58823acSDavid Howells struct afs_status_cb *new_scb) 1157d2ddc776SDavid Howells { 11585a813276SDavid Howells struct afs_vnode *vnode; 1159d2ddc776SDavid Howells struct inode *inode; 1160d2ddc776SDavid Howells 1161d2ddc776SDavid Howells if (fc->ac.error < 0) 1162d2ddc776SDavid Howells return; 1163d2ddc776SDavid Howells 1164d2ddc776SDavid Howells inode = afs_iget(fc->vnode->vfs_inode.i_sb, fc->key, 1165b8359153SDavid Howells new_data, new_scb, fc->cbi, fc->vnode); 1166d2ddc776SDavid Howells if (IS_ERR(inode)) { 1167d2ddc776SDavid Howells /* ENOMEM or EINTR at a really inconvenient time - just abandon 1168d2ddc776SDavid Howells * the new directory on the server. 1169d2ddc776SDavid Howells */ 1170d2ddc776SDavid Howells fc->ac.error = PTR_ERR(inode); 1171d2ddc776SDavid Howells return; 1172d2ddc776SDavid Howells } 1173d2ddc776SDavid Howells 11745a813276SDavid Howells vnode = AFS_FS_I(inode); 11755a813276SDavid Howells set_bit(AFS_VNODE_NEW_CONTENT, &vnode->flags); 1176a58823acSDavid Howells if (fc->ac.error == 0) 1177a58823acSDavid Howells afs_cache_permit(vnode, fc->key, vnode->cb_break, new_scb); 117873116df7SDavid Howells d_instantiate(new_dentry, inode); 1179d2ddc776SDavid Howells } 1180d2ddc776SDavid Howells 1181b8359153SDavid Howells static void afs_prep_for_new_inode(struct afs_fs_cursor *fc, 1182b8359153SDavid Howells struct afs_iget_data *iget_data) 1183b8359153SDavid Howells { 1184b8359153SDavid Howells iget_data->volume = fc->vnode->volume; 1185b8359153SDavid Howells iget_data->cb_v_break = fc->vnode->volume->cb_v_break; 1186b8359153SDavid Howells iget_data->cb_s_break = fc->cbi->server->cb_s_break; 1187b8359153SDavid Howells } 1188b8359153SDavid Howells 1189d2ddc776SDavid Howells /* 1190260a9803SDavid Howells * create a directory on an AFS filesystem 1191260a9803SDavid Howells */ 119218bb1db3SAl Viro static int afs_mkdir(struct inode *dir, struct dentry *dentry, umode_t mode) 1193260a9803SDavid Howells { 1194b8359153SDavid Howells struct afs_iget_data iget_data; 1195a58823acSDavid Howells struct afs_status_cb *scb; 1196d2ddc776SDavid Howells struct afs_fs_cursor fc; 1197d2ddc776SDavid Howells struct afs_vnode *dvnode = AFS_FS_I(dir); 1198260a9803SDavid Howells struct key *key; 1199260a9803SDavid Howells int ret; 1200260a9803SDavid Howells 1201d2ddc776SDavid Howells mode |= S_IFDIR; 1202260a9803SDavid Howells 12033b6492dfSDavid Howells _enter("{%llx:%llu},{%pd},%ho", 1204a455589fSAl Viro dvnode->fid.vid, dvnode->fid.vnode, dentry, mode); 1205260a9803SDavid Howells 1206a58823acSDavid Howells ret = -ENOMEM; 1207a58823acSDavid Howells scb = kcalloc(2, sizeof(struct afs_status_cb), GFP_KERNEL); 1208a58823acSDavid Howells if (!scb) 1209a58823acSDavid Howells goto error; 1210a58823acSDavid Howells 1211260a9803SDavid Howells key = afs_request_key(dvnode->volume->cell); 1212260a9803SDavid Howells if (IS_ERR(key)) { 1213260a9803SDavid Howells ret = PTR_ERR(key); 1214a58823acSDavid Howells goto error_scb; 1215260a9803SDavid Howells } 1216260a9803SDavid Howells 1217d2ddc776SDavid Howells ret = -ERESTARTSYS; 121820b8391fSDavid Howells if (afs_begin_vnode_operation(&fc, dvnode, key, true)) { 1219a58823acSDavid Howells afs_dataversion_t data_version = dvnode->status.data_version + 1; 1220a58823acSDavid Howells 1221d2ddc776SDavid Howells while (afs_select_fileserver(&fc)) { 122268251f0aSDavid Howells fc.cb_break = afs_calc_vnode_cb_break(dvnode); 1223b8359153SDavid Howells afs_prep_for_new_inode(&fc, &iget_data); 1224a58823acSDavid Howells afs_fs_create(&fc, dentry->d_name.name, mode, 1225b8359153SDavid Howells &scb[0], &iget_data.fid, &scb[1]); 1226d2ddc776SDavid Howells } 1227d2ddc776SDavid Howells 1228a58823acSDavid Howells afs_check_for_remote_deletion(&fc, dvnode); 1229a58823acSDavid Howells afs_vnode_commit_status(&fc, dvnode, fc.cb_break, 1230a58823acSDavid Howells &data_version, &scb[0]); 1231b8359153SDavid Howells afs_vnode_new_inode(&fc, dentry, &iget_data, &scb[1]); 1232d2ddc776SDavid Howells ret = afs_end_vnode_operation(&fc); 1233260a9803SDavid Howells if (ret < 0) 1234d2ddc776SDavid Howells goto error_key; 12354433b691SDavid Howells } else { 12364433b691SDavid Howells goto error_key; 1237260a9803SDavid Howells } 1238260a9803SDavid Howells 123963a4681fSDavid Howells if (ret == 0 && 124063a4681fSDavid Howells test_bit(AFS_VNODE_DIR_VALID, &dvnode->flags)) 1241b8359153SDavid Howells afs_edit_dir_add(dvnode, &dentry->d_name, &iget_data.fid, 124263a4681fSDavid Howells afs_edit_dir_for_create); 124363a4681fSDavid Howells 1244260a9803SDavid Howells key_put(key); 1245a58823acSDavid Howells kfree(scb); 1246260a9803SDavid Howells _leave(" = 0"); 1247260a9803SDavid Howells return 0; 1248260a9803SDavid Howells 1249d2ddc776SDavid Howells error_key: 1250260a9803SDavid Howells key_put(key); 1251a58823acSDavid Howells error_scb: 1252a58823acSDavid Howells kfree(scb); 1253260a9803SDavid Howells error: 1254260a9803SDavid Howells d_drop(dentry); 1255260a9803SDavid Howells _leave(" = %d", ret); 1256260a9803SDavid Howells return ret; 1257260a9803SDavid Howells } 1258260a9803SDavid Howells 1259260a9803SDavid Howells /* 1260d2ddc776SDavid Howells * Remove a subdir from a directory. 1261260a9803SDavid Howells */ 1262d2ddc776SDavid Howells static void afs_dir_remove_subdir(struct dentry *dentry) 1263260a9803SDavid Howells { 12642b0143b5SDavid Howells if (d_really_is_positive(dentry)) { 1265d2ddc776SDavid Howells struct afs_vnode *vnode = AFS_FS_I(d_inode(dentry)); 1266d2ddc776SDavid Howells 1267260a9803SDavid Howells clear_nlink(&vnode->vfs_inode); 1268260a9803SDavid Howells set_bit(AFS_VNODE_DELETED, &vnode->flags); 1269c435ee34SDavid Howells clear_bit(AFS_VNODE_CB_PROMISED, &vnode->flags); 127063a4681fSDavid Howells clear_bit(AFS_VNODE_DIR_VALID, &vnode->flags); 1271260a9803SDavid Howells } 1272260a9803SDavid Howells } 1273260a9803SDavid Howells 1274260a9803SDavid Howells /* 1275d2ddc776SDavid Howells * remove a directory from an AFS filesystem 1276260a9803SDavid Howells */ 1277d2ddc776SDavid Howells static int afs_rmdir(struct inode *dir, struct dentry *dentry) 1278260a9803SDavid Howells { 1279a58823acSDavid Howells struct afs_status_cb *scb; 1280d2ddc776SDavid Howells struct afs_fs_cursor fc; 1281f58db83fSDavid Howells struct afs_vnode *dvnode = AFS_FS_I(dir), *vnode = NULL; 1282260a9803SDavid Howells struct key *key; 1283260a9803SDavid Howells int ret; 1284260a9803SDavid Howells 12853b6492dfSDavid Howells _enter("{%llx:%llu},{%pd}", 1286a455589fSAl Viro dvnode->fid.vid, dvnode->fid.vnode, dentry); 1287260a9803SDavid Howells 1288a58823acSDavid Howells scb = kzalloc(sizeof(struct afs_status_cb), GFP_KERNEL); 1289a58823acSDavid Howells if (!scb) 1290a58823acSDavid Howells return -ENOMEM; 1291a58823acSDavid Howells 1292260a9803SDavid Howells key = afs_request_key(dvnode->volume->cell); 1293260a9803SDavid Howells if (IS_ERR(key)) { 1294260a9803SDavid Howells ret = PTR_ERR(key); 1295260a9803SDavid Howells goto error; 1296260a9803SDavid Howells } 1297260a9803SDavid Howells 1298f58db83fSDavid Howells /* Try to make sure we have a callback promise on the victim. */ 1299f58db83fSDavid Howells if (d_really_is_positive(dentry)) { 1300f58db83fSDavid Howells vnode = AFS_FS_I(d_inode(dentry)); 1301f58db83fSDavid Howells ret = afs_validate(vnode, key); 1302f58db83fSDavid Howells if (ret < 0) 1303f58db83fSDavid Howells goto error_key; 1304f58db83fSDavid Howells } 1305f58db83fSDavid Howells 130679ddbfa5SDavid Howells if (vnode) { 130779ddbfa5SDavid Howells ret = down_write_killable(&vnode->rmdir_lock); 130879ddbfa5SDavid Howells if (ret < 0) 130979ddbfa5SDavid Howells goto error_key; 131079ddbfa5SDavid Howells } 131179ddbfa5SDavid Howells 1312d2ddc776SDavid Howells ret = -ERESTARTSYS; 131320b8391fSDavid Howells if (afs_begin_vnode_operation(&fc, dvnode, key, true)) { 1314a58823acSDavid Howells afs_dataversion_t data_version = dvnode->status.data_version + 1; 1315a58823acSDavid Howells 1316d2ddc776SDavid Howells while (afs_select_fileserver(&fc)) { 131768251f0aSDavid Howells fc.cb_break = afs_calc_vnode_cb_break(dvnode); 1318a58823acSDavid Howells afs_fs_remove(&fc, vnode, dentry->d_name.name, true, scb); 1319260a9803SDavid Howells } 1320260a9803SDavid Howells 1321a58823acSDavid Howells afs_vnode_commit_status(&fc, dvnode, fc.cb_break, 1322a58823acSDavid Howells &data_version, scb); 1323d2ddc776SDavid Howells ret = afs_end_vnode_operation(&fc); 132463a4681fSDavid Howells if (ret == 0) { 1325d2ddc776SDavid Howells afs_dir_remove_subdir(dentry); 132663a4681fSDavid Howells if (test_bit(AFS_VNODE_DIR_VALID, &dvnode->flags)) 132763a4681fSDavid Howells afs_edit_dir_remove(dvnode, &dentry->d_name, 132863a4681fSDavid Howells afs_edit_dir_for_rmdir); 132963a4681fSDavid Howells } 1330260a9803SDavid Howells } 1331260a9803SDavid Howells 133279ddbfa5SDavid Howells if (vnode) 133379ddbfa5SDavid Howells up_write(&vnode->rmdir_lock); 1334f58db83fSDavid Howells error_key: 1335260a9803SDavid Howells key_put(key); 1336d2ddc776SDavid Howells error: 1337a58823acSDavid Howells kfree(scb); 1338d2ddc776SDavid Howells return ret; 1339d2ddc776SDavid Howells } 1340260a9803SDavid Howells 1341d2ddc776SDavid Howells /* 1342d2ddc776SDavid Howells * Remove a link to a file or symlink from a directory. 1343d2ddc776SDavid Howells * 1344d2ddc776SDavid Howells * If the file was not deleted due to excess hard links, the fileserver will 1345d2ddc776SDavid Howells * break the callback promise on the file - if it had one - before it returns 1346d2ddc776SDavid Howells * to us, and if it was deleted, it won't 1347d2ddc776SDavid Howells * 1348d2ddc776SDavid Howells * However, if we didn't have a callback promise outstanding, or it was 1349d2ddc776SDavid Howells * outstanding on a different server, then it won't break it either... 1350d2ddc776SDavid Howells */ 1351a38a7558SDavid Howells static int afs_dir_remove_link(struct afs_vnode *dvnode, struct dentry *dentry, 1352a38a7558SDavid Howells struct key *key) 1353d2ddc776SDavid Howells { 1354d2ddc776SDavid Howells int ret = 0; 1355d2ddc776SDavid Howells 1356d2ddc776SDavid Howells if (d_really_is_positive(dentry)) { 1357d2ddc776SDavid Howells struct afs_vnode *vnode = AFS_FS_I(d_inode(dentry)); 1358d2ddc776SDavid Howells 135930062bd1SDavid Howells if (test_bit(AFS_VNODE_DELETED, &vnode->flags)) { 136030062bd1SDavid Howells /* Already done */ 1361a38a7558SDavid Howells } else if (test_bit(AFS_VNODE_DIR_VALID, &dvnode->flags)) { 1362a38a7558SDavid Howells write_seqlock(&vnode->cb_lock); 1363440fbc3aSDavid Howells drop_nlink(&vnode->vfs_inode); 1364440fbc3aSDavid Howells if (vnode->vfs_inode.i_nlink == 0) { 1365440fbc3aSDavid Howells set_bit(AFS_VNODE_DELETED, &vnode->flags); 1366051d2525SDavid Howells __afs_break_callback(vnode, afs_cb_break_for_unlink); 1367440fbc3aSDavid Howells } 1368a38a7558SDavid Howells write_sequnlock(&vnode->cb_lock); 1369440fbc3aSDavid Howells ret = 0; 1370440fbc3aSDavid Howells } else { 1371051d2525SDavid Howells afs_break_callback(vnode, afs_cb_break_for_unlink); 1372440fbc3aSDavid Howells 1373d2ddc776SDavid Howells if (test_bit(AFS_VNODE_DELETED, &vnode->flags)) 1374d2ddc776SDavid Howells kdebug("AFS_VNODE_DELETED"); 1375d2ddc776SDavid Howells 1376d2ddc776SDavid Howells ret = afs_validate(vnode, key); 1377d2ddc776SDavid Howells if (ret == -ESTALE) 1378d2ddc776SDavid Howells ret = 0; 1379440fbc3aSDavid Howells } 1380d2ddc776SDavid Howells _debug("nlink %d [val %d]", vnode->vfs_inode.i_nlink, ret); 1381d2ddc776SDavid Howells } 1382d2ddc776SDavid Howells 1383d2ddc776SDavid Howells return ret; 1384d2ddc776SDavid Howells } 1385d2ddc776SDavid Howells 1386d2ddc776SDavid Howells /* 1387d2ddc776SDavid Howells * Remove a file or symlink from an AFS filesystem. 1388d2ddc776SDavid Howells */ 1389d2ddc776SDavid Howells static int afs_unlink(struct inode *dir, struct dentry *dentry) 1390d2ddc776SDavid Howells { 1391d2ddc776SDavid Howells struct afs_fs_cursor fc; 1392a58823acSDavid Howells struct afs_status_cb *scb; 1393fa59f52fSDavid Howells struct afs_vnode *dvnode = AFS_FS_I(dir); 1394fa59f52fSDavid Howells struct afs_vnode *vnode = AFS_FS_I(d_inode(dentry)); 1395d2ddc776SDavid Howells struct key *key; 139679ddbfa5SDavid Howells bool need_rehash = false; 1397d2ddc776SDavid Howells int ret; 1398d2ddc776SDavid Howells 13993b6492dfSDavid Howells _enter("{%llx:%llu},{%pd}", 1400d2ddc776SDavid Howells dvnode->fid.vid, dvnode->fid.vnode, dentry); 1401d2ddc776SDavid Howells 1402d2ddc776SDavid Howells if (dentry->d_name.len >= AFSNAMEMAX) 1403d2ddc776SDavid Howells return -ENAMETOOLONG; 1404d2ddc776SDavid Howells 1405a58823acSDavid Howells ret = -ENOMEM; 1406a58823acSDavid Howells scb = kcalloc(2, sizeof(struct afs_status_cb), GFP_KERNEL); 1407a58823acSDavid Howells if (!scb) 1408a58823acSDavid Howells goto error; 1409a58823acSDavid Howells 1410d2ddc776SDavid Howells key = afs_request_key(dvnode->volume->cell); 1411d2ddc776SDavid Howells if (IS_ERR(key)) { 1412d2ddc776SDavid Howells ret = PTR_ERR(key); 1413a58823acSDavid Howells goto error_scb; 1414d2ddc776SDavid Howells } 1415d2ddc776SDavid Howells 1416d2ddc776SDavid Howells /* Try to make sure we have a callback promise on the victim. */ 1417d2ddc776SDavid Howells ret = afs_validate(vnode, key); 1418d2ddc776SDavid Howells if (ret < 0) 1419d2ddc776SDavid Howells goto error_key; 1420d2ddc776SDavid Howells 142179ddbfa5SDavid Howells spin_lock(&dentry->d_lock); 1422fa59f52fSDavid Howells if (d_count(dentry) > 1) { 142379ddbfa5SDavid Howells spin_unlock(&dentry->d_lock); 142479ddbfa5SDavid Howells /* Start asynchronous writeout of the inode */ 142579ddbfa5SDavid Howells write_inode_now(d_inode(dentry), 0); 142679ddbfa5SDavid Howells ret = afs_sillyrename(dvnode, vnode, dentry, key); 142779ddbfa5SDavid Howells goto error_key; 142879ddbfa5SDavid Howells } 142979ddbfa5SDavid Howells if (!d_unhashed(dentry)) { 143079ddbfa5SDavid Howells /* Prevent a race with RCU lookup. */ 143179ddbfa5SDavid Howells __d_drop(dentry); 143279ddbfa5SDavid Howells need_rehash = true; 143379ddbfa5SDavid Howells } 143479ddbfa5SDavid Howells spin_unlock(&dentry->d_lock); 143579ddbfa5SDavid Howells 1436d2ddc776SDavid Howells ret = -ERESTARTSYS; 143720b8391fSDavid Howells if (afs_begin_vnode_operation(&fc, dvnode, key, true)) { 1438a58823acSDavid Howells afs_dataversion_t data_version = dvnode->status.data_version + 1; 1439a38a7558SDavid Howells afs_dataversion_t data_version_2 = vnode->status.data_version; 1440a58823acSDavid Howells 1441d2ddc776SDavid Howells while (afs_select_fileserver(&fc)) { 144268251f0aSDavid Howells fc.cb_break = afs_calc_vnode_cb_break(dvnode); 1443a38a7558SDavid Howells fc.cb_break_2 = afs_calc_vnode_cb_break(vnode); 144430062bd1SDavid Howells 144530062bd1SDavid Howells if (test_bit(AFS_SERVER_FL_IS_YFS, &fc.cbi->server->flags) && 144630062bd1SDavid Howells !test_bit(AFS_SERVER_FL_NO_RM2, &fc.cbi->server->flags)) { 144730062bd1SDavid Howells yfs_fs_remove_file2(&fc, vnode, dentry->d_name.name, 1448a58823acSDavid Howells &scb[0], &scb[1]); 144930062bd1SDavid Howells if (fc.ac.error != -ECONNABORTED || 145030062bd1SDavid Howells fc.ac.abort_code != RXGEN_OPCODE) 145130062bd1SDavid Howells continue; 145230062bd1SDavid Howells set_bit(AFS_SERVER_FL_NO_RM2, &fc.cbi->server->flags); 145330062bd1SDavid Howells } 145430062bd1SDavid Howells 1455a58823acSDavid Howells afs_fs_remove(&fc, vnode, dentry->d_name.name, false, &scb[0]); 1456d2ddc776SDavid Howells } 1457d2ddc776SDavid Howells 1458a58823acSDavid Howells afs_vnode_commit_status(&fc, dvnode, fc.cb_break, 1459a58823acSDavid Howells &data_version, &scb[0]); 1460a38a7558SDavid Howells afs_vnode_commit_status(&fc, vnode, fc.cb_break_2, 1461a38a7558SDavid Howells &data_version_2, &scb[1]); 1462d2ddc776SDavid Howells ret = afs_end_vnode_operation(&fc); 1463a38a7558SDavid Howells if (ret == 0 && !(scb[1].have_status || scb[1].have_error)) 1464a38a7558SDavid Howells ret = afs_dir_remove_link(dvnode, dentry, key); 146563a4681fSDavid Howells if (ret == 0 && 146663a4681fSDavid Howells test_bit(AFS_VNODE_DIR_VALID, &dvnode->flags)) 146763a4681fSDavid Howells afs_edit_dir_remove(dvnode, &dentry->d_name, 146863a4681fSDavid Howells afs_edit_dir_for_unlink); 1469d2ddc776SDavid Howells } 1470d2ddc776SDavid Howells 147179ddbfa5SDavid Howells if (need_rehash && ret < 0 && ret != -ENOENT) 147279ddbfa5SDavid Howells d_rehash(dentry); 147379ddbfa5SDavid Howells 1474d2ddc776SDavid Howells error_key: 1475260a9803SDavid Howells key_put(key); 1476a58823acSDavid Howells error_scb: 1477a58823acSDavid Howells kfree(scb); 1478260a9803SDavid Howells error: 1479260a9803SDavid Howells _leave(" = %d", ret); 1480260a9803SDavid Howells return ret; 1481260a9803SDavid Howells } 1482260a9803SDavid Howells 1483260a9803SDavid Howells /* 1484260a9803SDavid Howells * create a regular file on an AFS filesystem 1485260a9803SDavid Howells */ 14864acdaf27SAl Viro static int afs_create(struct inode *dir, struct dentry *dentry, umode_t mode, 1487ebfc3b49SAl Viro bool excl) 1488260a9803SDavid Howells { 1489b8359153SDavid Howells struct afs_iget_data iget_data; 1490d2ddc776SDavid Howells struct afs_fs_cursor fc; 1491a58823acSDavid Howells struct afs_status_cb *scb; 149243dd388bSColin Ian King struct afs_vnode *dvnode = AFS_FS_I(dir); 1493260a9803SDavid Howells struct key *key; 1494260a9803SDavid Howells int ret; 1495260a9803SDavid Howells 1496d2ddc776SDavid Howells mode |= S_IFREG; 1497260a9803SDavid Howells 14983b6492dfSDavid Howells _enter("{%llx:%llu},{%pd},%ho,", 1499a455589fSAl Viro dvnode->fid.vid, dvnode->fid.vnode, dentry, mode); 1500260a9803SDavid Howells 1501d2ddc776SDavid Howells ret = -ENAMETOOLONG; 1502d2ddc776SDavid Howells if (dentry->d_name.len >= AFSNAMEMAX) 1503d2ddc776SDavid Howells goto error; 1504d2ddc776SDavid Howells 1505260a9803SDavid Howells key = afs_request_key(dvnode->volume->cell); 1506260a9803SDavid Howells if (IS_ERR(key)) { 1507260a9803SDavid Howells ret = PTR_ERR(key); 1508260a9803SDavid Howells goto error; 1509260a9803SDavid Howells } 1510260a9803SDavid Howells 1511a58823acSDavid Howells ret = -ENOMEM; 1512a58823acSDavid Howells scb = kcalloc(2, sizeof(struct afs_status_cb), GFP_KERNEL); 1513a58823acSDavid Howells if (!scb) 1514a58823acSDavid Howells goto error_scb; 1515a58823acSDavid Howells 1516d2ddc776SDavid Howells ret = -ERESTARTSYS; 151720b8391fSDavid Howells if (afs_begin_vnode_operation(&fc, dvnode, key, true)) { 1518a58823acSDavid Howells afs_dataversion_t data_version = dvnode->status.data_version + 1; 1519a58823acSDavid Howells 1520d2ddc776SDavid Howells while (afs_select_fileserver(&fc)) { 152168251f0aSDavid Howells fc.cb_break = afs_calc_vnode_cb_break(dvnode); 1522b8359153SDavid Howells afs_prep_for_new_inode(&fc, &iget_data); 1523a58823acSDavid Howells afs_fs_create(&fc, dentry->d_name.name, mode, 1524b8359153SDavid Howells &scb[0], &iget_data.fid, &scb[1]); 1525d2ddc776SDavid Howells } 1526d2ddc776SDavid Howells 1527a58823acSDavid Howells afs_check_for_remote_deletion(&fc, dvnode); 1528a58823acSDavid Howells afs_vnode_commit_status(&fc, dvnode, fc.cb_break, 1529a58823acSDavid Howells &data_version, &scb[0]); 1530b8359153SDavid Howells afs_vnode_new_inode(&fc, dentry, &iget_data, &scb[1]); 1531d2ddc776SDavid Howells ret = afs_end_vnode_operation(&fc); 1532260a9803SDavid Howells if (ret < 0) 1533d2ddc776SDavid Howells goto error_key; 15344433b691SDavid Howells } else { 15354433b691SDavid Howells goto error_key; 1536260a9803SDavid Howells } 1537260a9803SDavid Howells 153863a4681fSDavid Howells if (test_bit(AFS_VNODE_DIR_VALID, &dvnode->flags)) 1539b8359153SDavid Howells afs_edit_dir_add(dvnode, &dentry->d_name, &iget_data.fid, 154063a4681fSDavid Howells afs_edit_dir_for_create); 154163a4681fSDavid Howells 1542a58823acSDavid Howells kfree(scb); 1543260a9803SDavid Howells key_put(key); 1544260a9803SDavid Howells _leave(" = 0"); 1545260a9803SDavid Howells return 0; 1546260a9803SDavid Howells 1547a58823acSDavid Howells error_scb: 1548a58823acSDavid Howells kfree(scb); 1549d2ddc776SDavid Howells error_key: 1550260a9803SDavid Howells key_put(key); 1551260a9803SDavid Howells error: 1552260a9803SDavid Howells d_drop(dentry); 1553260a9803SDavid Howells _leave(" = %d", ret); 1554260a9803SDavid Howells return ret; 1555260a9803SDavid Howells } 1556260a9803SDavid Howells 1557260a9803SDavid Howells /* 1558260a9803SDavid Howells * create a hard link between files in an AFS filesystem 1559260a9803SDavid Howells */ 1560260a9803SDavid Howells static int afs_link(struct dentry *from, struct inode *dir, 1561260a9803SDavid Howells struct dentry *dentry) 1562260a9803SDavid Howells { 1563d2ddc776SDavid Howells struct afs_fs_cursor fc; 1564a58823acSDavid Howells struct afs_status_cb *scb; 1565a58823acSDavid Howells struct afs_vnode *dvnode = AFS_FS_I(dir); 1566a58823acSDavid Howells struct afs_vnode *vnode = AFS_FS_I(d_inode(from)); 1567260a9803SDavid Howells struct key *key; 1568260a9803SDavid Howells int ret; 1569260a9803SDavid Howells 15703b6492dfSDavid Howells _enter("{%llx:%llu},{%llx:%llu},{%pd}", 1571260a9803SDavid Howells vnode->fid.vid, vnode->fid.vnode, 1572260a9803SDavid Howells dvnode->fid.vid, dvnode->fid.vnode, 1573a455589fSAl Viro dentry); 1574260a9803SDavid Howells 1575d2ddc776SDavid Howells ret = -ENAMETOOLONG; 1576d2ddc776SDavid Howells if (dentry->d_name.len >= AFSNAMEMAX) 1577d2ddc776SDavid Howells goto error; 1578d2ddc776SDavid Howells 1579a58823acSDavid Howells ret = -ENOMEM; 1580a58823acSDavid Howells scb = kcalloc(2, sizeof(struct afs_status_cb), GFP_KERNEL); 1581a58823acSDavid Howells if (!scb) 1582a58823acSDavid Howells goto error; 1583a58823acSDavid Howells 1584260a9803SDavid Howells key = afs_request_key(dvnode->volume->cell); 1585260a9803SDavid Howells if (IS_ERR(key)) { 1586260a9803SDavid Howells ret = PTR_ERR(key); 1587a58823acSDavid Howells goto error_scb; 1588260a9803SDavid Howells } 1589260a9803SDavid Howells 1590d2ddc776SDavid Howells ret = -ERESTARTSYS; 159120b8391fSDavid Howells if (afs_begin_vnode_operation(&fc, dvnode, key, true)) { 1592a58823acSDavid Howells afs_dataversion_t data_version = dvnode->status.data_version + 1; 1593a58823acSDavid Howells 1594d2ddc776SDavid Howells if (mutex_lock_interruptible_nested(&vnode->io_lock, 1) < 0) { 1595d2ddc776SDavid Howells afs_end_vnode_operation(&fc); 1596bc1527dcSDavid Howells goto error_key; 1597d2ddc776SDavid Howells } 1598260a9803SDavid Howells 1599d2ddc776SDavid Howells while (afs_select_fileserver(&fc)) { 160068251f0aSDavid Howells fc.cb_break = afs_calc_vnode_cb_break(dvnode); 160168251f0aSDavid Howells fc.cb_break_2 = afs_calc_vnode_cb_break(vnode); 1602a58823acSDavid Howells afs_fs_link(&fc, vnode, dentry->d_name.name, 1603a58823acSDavid Howells &scb[0], &scb[1]); 1604d2ddc776SDavid Howells } 1605d2ddc776SDavid Howells 1606a58823acSDavid Howells afs_vnode_commit_status(&fc, dvnode, fc.cb_break, 1607a58823acSDavid Howells &data_version, &scb[0]); 1608a58823acSDavid Howells afs_vnode_commit_status(&fc, vnode, fc.cb_break_2, 1609a58823acSDavid Howells NULL, &scb[1]); 16107de9c6eeSAl Viro ihold(&vnode->vfs_inode); 1611260a9803SDavid Howells d_instantiate(dentry, &vnode->vfs_inode); 1612d2ddc776SDavid Howells 1613d2ddc776SDavid Howells mutex_unlock(&vnode->io_lock); 1614d2ddc776SDavid Howells ret = afs_end_vnode_operation(&fc); 1615d2ddc776SDavid Howells if (ret < 0) 1616d2ddc776SDavid Howells goto error_key; 16174433b691SDavid Howells } else { 16184433b691SDavid Howells goto error_key; 1619d2ddc776SDavid Howells } 1620d2ddc776SDavid Howells 162163a4681fSDavid Howells if (test_bit(AFS_VNODE_DIR_VALID, &dvnode->flags)) 162263a4681fSDavid Howells afs_edit_dir_add(dvnode, &dentry->d_name, &vnode->fid, 162363a4681fSDavid Howells afs_edit_dir_for_link); 162463a4681fSDavid Howells 1625260a9803SDavid Howells key_put(key); 1626a58823acSDavid Howells kfree(scb); 1627260a9803SDavid Howells _leave(" = 0"); 1628260a9803SDavid Howells return 0; 1629260a9803SDavid Howells 1630d2ddc776SDavid Howells error_key: 1631260a9803SDavid Howells key_put(key); 1632a58823acSDavid Howells error_scb: 1633a58823acSDavid Howells kfree(scb); 1634260a9803SDavid Howells error: 1635260a9803SDavid Howells d_drop(dentry); 1636260a9803SDavid Howells _leave(" = %d", ret); 1637260a9803SDavid Howells return ret; 1638260a9803SDavid Howells } 1639260a9803SDavid Howells 1640260a9803SDavid Howells /* 1641260a9803SDavid Howells * create a symlink in an AFS filesystem 1642260a9803SDavid Howells */ 1643260a9803SDavid Howells static int afs_symlink(struct inode *dir, struct dentry *dentry, 1644260a9803SDavid Howells const char *content) 1645260a9803SDavid Howells { 1646b8359153SDavid Howells struct afs_iget_data iget_data; 1647d2ddc776SDavid Howells struct afs_fs_cursor fc; 1648a58823acSDavid Howells struct afs_status_cb *scb; 1649d2ddc776SDavid Howells struct afs_vnode *dvnode = AFS_FS_I(dir); 1650260a9803SDavid Howells struct key *key; 1651260a9803SDavid Howells int ret; 1652260a9803SDavid Howells 16533b6492dfSDavid Howells _enter("{%llx:%llu},{%pd},%s", 1654a455589fSAl Viro dvnode->fid.vid, dvnode->fid.vnode, dentry, 1655260a9803SDavid Howells content); 1656260a9803SDavid Howells 1657d2ddc776SDavid Howells ret = -ENAMETOOLONG; 1658d2ddc776SDavid Howells if (dentry->d_name.len >= AFSNAMEMAX) 1659d2ddc776SDavid Howells goto error; 1660d2ddc776SDavid Howells 1661260a9803SDavid Howells ret = -EINVAL; 166245222b9eSDavid Howells if (strlen(content) >= AFSPATHMAX) 1663260a9803SDavid Howells goto error; 1664260a9803SDavid Howells 1665a58823acSDavid Howells ret = -ENOMEM; 1666a58823acSDavid Howells scb = kcalloc(2, sizeof(struct afs_status_cb), GFP_KERNEL); 1667a58823acSDavid Howells if (!scb) 1668a58823acSDavid Howells goto error; 1669a58823acSDavid Howells 1670260a9803SDavid Howells key = afs_request_key(dvnode->volume->cell); 1671260a9803SDavid Howells if (IS_ERR(key)) { 1672260a9803SDavid Howells ret = PTR_ERR(key); 1673a58823acSDavid Howells goto error_scb; 1674260a9803SDavid Howells } 1675260a9803SDavid Howells 1676d2ddc776SDavid Howells ret = -ERESTARTSYS; 167720b8391fSDavid Howells if (afs_begin_vnode_operation(&fc, dvnode, key, true)) { 1678a58823acSDavid Howells afs_dataversion_t data_version = dvnode->status.data_version + 1; 1679a58823acSDavid Howells 1680d2ddc776SDavid Howells while (afs_select_fileserver(&fc)) { 168168251f0aSDavid Howells fc.cb_break = afs_calc_vnode_cb_break(dvnode); 1682b8359153SDavid Howells afs_prep_for_new_inode(&fc, &iget_data); 1683a58823acSDavid Howells afs_fs_symlink(&fc, dentry->d_name.name, content, 1684b8359153SDavid Howells &scb[0], &iget_data.fid, &scb[1]); 1685d2ddc776SDavid Howells } 1686d2ddc776SDavid Howells 1687a58823acSDavid Howells afs_check_for_remote_deletion(&fc, dvnode); 1688a58823acSDavid Howells afs_vnode_commit_status(&fc, dvnode, fc.cb_break, 1689a58823acSDavid Howells &data_version, &scb[0]); 1690b8359153SDavid Howells afs_vnode_new_inode(&fc, dentry, &iget_data, &scb[1]); 1691d2ddc776SDavid Howells ret = afs_end_vnode_operation(&fc); 1692260a9803SDavid Howells if (ret < 0) 1693d2ddc776SDavid Howells goto error_key; 16944433b691SDavid Howells } else { 16954433b691SDavid Howells goto error_key; 1696260a9803SDavid Howells } 1697260a9803SDavid Howells 169863a4681fSDavid Howells if (test_bit(AFS_VNODE_DIR_VALID, &dvnode->flags)) 1699b8359153SDavid Howells afs_edit_dir_add(dvnode, &dentry->d_name, &iget_data.fid, 170063a4681fSDavid Howells afs_edit_dir_for_symlink); 170163a4681fSDavid Howells 1702260a9803SDavid Howells key_put(key); 1703a58823acSDavid Howells kfree(scb); 1704260a9803SDavid Howells _leave(" = 0"); 1705260a9803SDavid Howells return 0; 1706260a9803SDavid Howells 1707d2ddc776SDavid Howells error_key: 1708260a9803SDavid Howells key_put(key); 1709a58823acSDavid Howells error_scb: 1710a58823acSDavid Howells kfree(scb); 1711260a9803SDavid Howells error: 1712260a9803SDavid Howells d_drop(dentry); 1713260a9803SDavid Howells _leave(" = %d", ret); 1714260a9803SDavid Howells return ret; 1715260a9803SDavid Howells } 1716260a9803SDavid Howells 1717260a9803SDavid Howells /* 1718260a9803SDavid Howells * rename a file in an AFS filesystem and/or move it between directories 1719260a9803SDavid Howells */ 1720260a9803SDavid Howells static int afs_rename(struct inode *old_dir, struct dentry *old_dentry, 17211cd66c93SMiklos Szeredi struct inode *new_dir, struct dentry *new_dentry, 17221cd66c93SMiklos Szeredi unsigned int flags) 1723260a9803SDavid Howells { 1724d2ddc776SDavid Howells struct afs_fs_cursor fc; 1725a58823acSDavid Howells struct afs_status_cb *scb; 1726260a9803SDavid Howells struct afs_vnode *orig_dvnode, *new_dvnode, *vnode; 172779ddbfa5SDavid Howells struct dentry *tmp = NULL, *rehash = NULL; 172879ddbfa5SDavid Howells struct inode *new_inode; 1729260a9803SDavid Howells struct key *key; 173063a4681fSDavid Howells bool new_negative = d_is_negative(new_dentry); 1731260a9803SDavid Howells int ret; 1732260a9803SDavid Howells 17331cd66c93SMiklos Szeredi if (flags) 17341cd66c93SMiklos Szeredi return -EINVAL; 17351cd66c93SMiklos Szeredi 173679ddbfa5SDavid Howells /* Don't allow silly-rename files be moved around. */ 173779ddbfa5SDavid Howells if (old_dentry->d_flags & DCACHE_NFSFS_RENAMED) 173879ddbfa5SDavid Howells return -EINVAL; 173979ddbfa5SDavid Howells 17402b0143b5SDavid Howells vnode = AFS_FS_I(d_inode(old_dentry)); 1741260a9803SDavid Howells orig_dvnode = AFS_FS_I(old_dir); 1742260a9803SDavid Howells new_dvnode = AFS_FS_I(new_dir); 1743260a9803SDavid Howells 17443b6492dfSDavid Howells _enter("{%llx:%llu},{%llx:%llu},{%llx:%llu},{%pd}", 1745260a9803SDavid Howells orig_dvnode->fid.vid, orig_dvnode->fid.vnode, 1746260a9803SDavid Howells vnode->fid.vid, vnode->fid.vnode, 1747260a9803SDavid Howells new_dvnode->fid.vid, new_dvnode->fid.vnode, 1748a455589fSAl Viro new_dentry); 1749260a9803SDavid Howells 1750a58823acSDavid Howells ret = -ENOMEM; 1751a58823acSDavid Howells scb = kcalloc(2, sizeof(struct afs_status_cb), GFP_KERNEL); 1752a58823acSDavid Howells if (!scb) 1753a58823acSDavid Howells goto error; 1754a58823acSDavid Howells 1755260a9803SDavid Howells key = afs_request_key(orig_dvnode->volume->cell); 1756260a9803SDavid Howells if (IS_ERR(key)) { 1757260a9803SDavid Howells ret = PTR_ERR(key); 1758a58823acSDavid Howells goto error_scb; 1759260a9803SDavid Howells } 1760260a9803SDavid Howells 176179ddbfa5SDavid Howells /* For non-directories, check whether the target is busy and if so, 176279ddbfa5SDavid Howells * make a copy of the dentry and then do a silly-rename. If the 176379ddbfa5SDavid Howells * silly-rename succeeds, the copied dentry is hashed and becomes the 176479ddbfa5SDavid Howells * new target. 176579ddbfa5SDavid Howells */ 176679ddbfa5SDavid Howells if (d_is_positive(new_dentry) && !d_is_dir(new_dentry)) { 176779ddbfa5SDavid Howells /* To prevent any new references to the target during the 176879ddbfa5SDavid Howells * rename, we unhash the dentry in advance. 176979ddbfa5SDavid Howells */ 177079ddbfa5SDavid Howells if (!d_unhashed(new_dentry)) { 177179ddbfa5SDavid Howells d_drop(new_dentry); 177279ddbfa5SDavid Howells rehash = new_dentry; 177379ddbfa5SDavid Howells } 177479ddbfa5SDavid Howells 177579ddbfa5SDavid Howells if (d_count(new_dentry) > 2) { 177679ddbfa5SDavid Howells /* copy the target dentry's name */ 177779ddbfa5SDavid Howells ret = -ENOMEM; 177879ddbfa5SDavid Howells tmp = d_alloc(new_dentry->d_parent, 177979ddbfa5SDavid Howells &new_dentry->d_name); 178079ddbfa5SDavid Howells if (!tmp) 178179ddbfa5SDavid Howells goto error_rehash; 178279ddbfa5SDavid Howells 178379ddbfa5SDavid Howells ret = afs_sillyrename(new_dvnode, 178479ddbfa5SDavid Howells AFS_FS_I(d_inode(new_dentry)), 178579ddbfa5SDavid Howells new_dentry, key); 178679ddbfa5SDavid Howells if (ret) 178779ddbfa5SDavid Howells goto error_rehash; 178879ddbfa5SDavid Howells 178979ddbfa5SDavid Howells new_dentry = tmp; 179079ddbfa5SDavid Howells rehash = NULL; 179179ddbfa5SDavid Howells new_negative = true; 179279ddbfa5SDavid Howells } 179379ddbfa5SDavid Howells } 179479ddbfa5SDavid Howells 1795d2ddc776SDavid Howells ret = -ERESTARTSYS; 179620b8391fSDavid Howells if (afs_begin_vnode_operation(&fc, orig_dvnode, key, true)) { 1797a58823acSDavid Howells afs_dataversion_t orig_data_version; 1798a58823acSDavid Howells afs_dataversion_t new_data_version; 1799a58823acSDavid Howells struct afs_status_cb *new_scb = &scb[1]; 1800a58823acSDavid Howells 1801a58823acSDavid Howells orig_data_version = orig_dvnode->status.data_version + 1; 1802a58823acSDavid Howells 1803d2ddc776SDavid Howells if (orig_dvnode != new_dvnode) { 1804d2ddc776SDavid Howells if (mutex_lock_interruptible_nested(&new_dvnode->io_lock, 1) < 0) { 1805d2ddc776SDavid Howells afs_end_vnode_operation(&fc); 180679ddbfa5SDavid Howells goto error_rehash; 1807d2ddc776SDavid Howells } 180837c0bbb3SDavid Howells new_data_version = new_dvnode->status.data_version + 1; 1809a58823acSDavid Howells } else { 1810a58823acSDavid Howells new_data_version = orig_data_version; 1811a58823acSDavid Howells new_scb = &scb[0]; 1812d2ddc776SDavid Howells } 1813a58823acSDavid Howells 1814d2ddc776SDavid Howells while (afs_select_fileserver(&fc)) { 181568251f0aSDavid Howells fc.cb_break = afs_calc_vnode_cb_break(orig_dvnode); 181668251f0aSDavid Howells fc.cb_break_2 = afs_calc_vnode_cb_break(new_dvnode); 1817d2ddc776SDavid Howells afs_fs_rename(&fc, old_dentry->d_name.name, 181863a4681fSDavid Howells new_dvnode, new_dentry->d_name.name, 1819a58823acSDavid Howells &scb[0], new_scb); 1820d2ddc776SDavid Howells } 1821d2ddc776SDavid Howells 1822a58823acSDavid Howells afs_vnode_commit_status(&fc, orig_dvnode, fc.cb_break, 1823a58823acSDavid Howells &orig_data_version, &scb[0]); 1824a58823acSDavid Howells if (new_dvnode != orig_dvnode) { 1825a58823acSDavid Howells afs_vnode_commit_status(&fc, new_dvnode, fc.cb_break_2, 1826a58823acSDavid Howells &new_data_version, &scb[1]); 1827d2ddc776SDavid Howells mutex_unlock(&new_dvnode->io_lock); 1828a58823acSDavid Howells } 1829d2ddc776SDavid Howells ret = afs_end_vnode_operation(&fc); 1830260a9803SDavid Howells if (ret < 0) 183179ddbfa5SDavid Howells goto error_rehash; 1832d2ddc776SDavid Howells } 1833d2ddc776SDavid Howells 183463a4681fSDavid Howells if (ret == 0) { 183579ddbfa5SDavid Howells if (rehash) 183679ddbfa5SDavid Howells d_rehash(rehash); 183763a4681fSDavid Howells if (test_bit(AFS_VNODE_DIR_VALID, &orig_dvnode->flags)) 183863a4681fSDavid Howells afs_edit_dir_remove(orig_dvnode, &old_dentry->d_name, 183979ddbfa5SDavid Howells afs_edit_dir_for_rename_0); 184063a4681fSDavid Howells 184163a4681fSDavid Howells if (!new_negative && 184263a4681fSDavid Howells test_bit(AFS_VNODE_DIR_VALID, &new_dvnode->flags)) 184363a4681fSDavid Howells afs_edit_dir_remove(new_dvnode, &new_dentry->d_name, 184479ddbfa5SDavid Howells afs_edit_dir_for_rename_1); 184563a4681fSDavid Howells 184663a4681fSDavid Howells if (test_bit(AFS_VNODE_DIR_VALID, &new_dvnode->flags)) 184763a4681fSDavid Howells afs_edit_dir_add(new_dvnode, &new_dentry->d_name, 184879ddbfa5SDavid Howells &vnode->fid, afs_edit_dir_for_rename_2); 184979ddbfa5SDavid Howells 185079ddbfa5SDavid Howells new_inode = d_inode(new_dentry); 185179ddbfa5SDavid Howells if (new_inode) { 185279ddbfa5SDavid Howells spin_lock(&new_inode->i_lock); 185379ddbfa5SDavid Howells if (new_inode->i_nlink > 0) 185479ddbfa5SDavid Howells drop_nlink(new_inode); 185579ddbfa5SDavid Howells spin_unlock(&new_inode->i_lock); 185679ddbfa5SDavid Howells } 185779ddbfa5SDavid Howells d_move(old_dentry, new_dentry); 185879ddbfa5SDavid Howells goto error_tmp; 185963a4681fSDavid Howells } 186063a4681fSDavid Howells 186179ddbfa5SDavid Howells error_rehash: 186279ddbfa5SDavid Howells if (rehash) 186379ddbfa5SDavid Howells d_rehash(rehash); 186479ddbfa5SDavid Howells error_tmp: 186579ddbfa5SDavid Howells if (tmp) 186679ddbfa5SDavid Howells dput(tmp); 1867260a9803SDavid Howells key_put(key); 1868a58823acSDavid Howells error_scb: 1869a58823acSDavid Howells kfree(scb); 1870260a9803SDavid Howells error: 1871260a9803SDavid Howells _leave(" = %d", ret); 1872260a9803SDavid Howells return ret; 1873260a9803SDavid Howells } 1874f3ddee8dSDavid Howells 1875f3ddee8dSDavid Howells /* 1876f3ddee8dSDavid Howells * Release a directory page and clean up its private state if it's not busy 1877f3ddee8dSDavid Howells * - return true if the page can now be released, false if not 1878f3ddee8dSDavid Howells */ 1879f3ddee8dSDavid Howells static int afs_dir_releasepage(struct page *page, gfp_t gfp_flags) 1880f3ddee8dSDavid Howells { 1881f3ddee8dSDavid Howells struct afs_vnode *dvnode = AFS_FS_I(page->mapping->host); 1882f3ddee8dSDavid Howells 18833b6492dfSDavid Howells _enter("{{%llx:%llu}[%lu]}", dvnode->fid.vid, dvnode->fid.vnode, page->index); 1884f3ddee8dSDavid Howells 1885f3ddee8dSDavid Howells set_page_private(page, 0); 1886f3ddee8dSDavid Howells ClearPagePrivate(page); 1887f3ddee8dSDavid Howells 1888f3ddee8dSDavid Howells /* The directory will need reloading. */ 1889f3ddee8dSDavid Howells if (test_and_clear_bit(AFS_VNODE_DIR_VALID, &dvnode->flags)) 1890f3ddee8dSDavid Howells afs_stat_v(dvnode, n_relpg); 1891f3ddee8dSDavid Howells return 1; 1892f3ddee8dSDavid Howells } 1893f3ddee8dSDavid Howells 1894f3ddee8dSDavid Howells /* 1895f3ddee8dSDavid Howells * invalidate part or all of a page 1896f3ddee8dSDavid Howells * - release a page and clean up its private data if offset is 0 (indicating 1897f3ddee8dSDavid Howells * the entire page) 1898f3ddee8dSDavid Howells */ 1899f3ddee8dSDavid Howells static void afs_dir_invalidatepage(struct page *page, unsigned int offset, 1900f3ddee8dSDavid Howells unsigned int length) 1901f3ddee8dSDavid Howells { 1902f3ddee8dSDavid Howells struct afs_vnode *dvnode = AFS_FS_I(page->mapping->host); 1903f3ddee8dSDavid Howells 1904f3ddee8dSDavid Howells _enter("{%lu},%u,%u", page->index, offset, length); 1905f3ddee8dSDavid Howells 1906f3ddee8dSDavid Howells BUG_ON(!PageLocked(page)); 1907f3ddee8dSDavid Howells 1908f3ddee8dSDavid Howells /* The directory will need reloading. */ 1909f3ddee8dSDavid Howells if (test_and_clear_bit(AFS_VNODE_DIR_VALID, &dvnode->flags)) 1910f3ddee8dSDavid Howells afs_stat_v(dvnode, n_inval); 1911f3ddee8dSDavid Howells 1912f3ddee8dSDavid Howells /* we clean up only if the entire page is being invalidated */ 1913f3ddee8dSDavid Howells if (offset == 0 && length == PAGE_SIZE) { 1914f3ddee8dSDavid Howells set_page_private(page, 0); 1915f3ddee8dSDavid Howells ClearPagePrivate(page); 1916f3ddee8dSDavid Howells } 1917f3ddee8dSDavid Howells } 1918