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 241f3ddee8dSDavid Howells req = kzalloc(sizeof(*req) + sizeof(struct page *) * nr_inline, 242f3ddee8dSDavid Howells GFP_KERNEL); 243f3ddee8dSDavid Howells if (!req) 244f3ddee8dSDavid Howells return ERR_PTR(-ENOMEM); 245f3ddee8dSDavid Howells 246f3ddee8dSDavid Howells refcount_set(&req->usage, 1); 247f3ddee8dSDavid Howells req->nr_pages = nr_pages; 248f3ddee8dSDavid Howells req->actual_len = i_size; /* May change */ 249f3ddee8dSDavid Howells req->len = nr_pages * PAGE_SIZE; /* We can ask for more than there is */ 250f3ddee8dSDavid Howells req->data_version = dvnode->status.data_version; /* May change */ 251f3ddee8dSDavid Howells if (nr_inline > 0) { 252f3ddee8dSDavid Howells req->pages = req->array; 253f3ddee8dSDavid Howells } else { 254f3ddee8dSDavid Howells req->pages = kcalloc(nr_pages, sizeof(struct page *), 255f3ddee8dSDavid Howells GFP_KERNEL); 256f3ddee8dSDavid Howells if (!req->pages) 257f3ddee8dSDavid Howells goto error; 258f3ddee8dSDavid Howells } 259f3ddee8dSDavid Howells 260f3ddee8dSDavid Howells /* Get a list of all the pages that hold or will hold the directory 261f3ddee8dSDavid Howells * content. We need to fill in any gaps that we might find where the 262f3ddee8dSDavid Howells * memory reclaimer has been at work. If there are any gaps, we will 263f3ddee8dSDavid Howells * need to reread the entire directory contents. 264f3ddee8dSDavid Howells */ 265f3ddee8dSDavid Howells i = 0; 266f3ddee8dSDavid Howells do { 267f3ddee8dSDavid Howells n = find_get_pages_contig(dvnode->vfs_inode.i_mapping, i, 268f3ddee8dSDavid Howells req->nr_pages - i, 269f3ddee8dSDavid Howells req->pages + i); 270f3ddee8dSDavid Howells _debug("find %u at %u/%u", n, i, req->nr_pages); 271f3ddee8dSDavid Howells if (n == 0) { 272f3ddee8dSDavid Howells gfp_t gfp = dvnode->vfs_inode.i_mapping->gfp_mask; 273f3ddee8dSDavid Howells 274f3ddee8dSDavid Howells if (test_and_clear_bit(AFS_VNODE_DIR_VALID, &dvnode->flags)) 275f3ddee8dSDavid Howells afs_stat_v(dvnode, n_inval); 276f3ddee8dSDavid Howells 277f3ddee8dSDavid Howells ret = -ENOMEM; 278f3ddee8dSDavid Howells req->pages[i] = __page_cache_alloc(gfp); 279f3ddee8dSDavid Howells if (!req->pages[i]) 280f3ddee8dSDavid Howells goto error; 281f3ddee8dSDavid Howells ret = add_to_page_cache_lru(req->pages[i], 282f3ddee8dSDavid Howells dvnode->vfs_inode.i_mapping, 283f3ddee8dSDavid Howells i, gfp); 284f3ddee8dSDavid Howells if (ret < 0) 285f3ddee8dSDavid Howells goto error; 286f3ddee8dSDavid Howells 287f3ddee8dSDavid Howells set_page_private(req->pages[i], 1); 288f3ddee8dSDavid Howells SetPagePrivate(req->pages[i]); 289f3ddee8dSDavid Howells unlock_page(req->pages[i]); 290f3ddee8dSDavid Howells i++; 291f3ddee8dSDavid Howells } else { 292f3ddee8dSDavid Howells i += n; 293f3ddee8dSDavid Howells } 294f3ddee8dSDavid Howells } while (i < req->nr_pages); 295f3ddee8dSDavid Howells 296f3ddee8dSDavid Howells /* If we're going to reload, we need to lock all the pages to prevent 297f3ddee8dSDavid Howells * races. 298f3ddee8dSDavid Howells */ 299f3ddee8dSDavid Howells ret = -ERESTARTSYS; 300b61f7dcfSDavid Howells if (down_read_killable(&dvnode->validate_lock) < 0) 301b61f7dcfSDavid Howells goto error; 302f3ddee8dSDavid Howells 303f3ddee8dSDavid Howells if (test_bit(AFS_VNODE_DIR_VALID, &dvnode->flags)) 304f3ddee8dSDavid Howells goto success; 305f3ddee8dSDavid Howells 306b61f7dcfSDavid Howells up_read(&dvnode->validate_lock); 307b61f7dcfSDavid Howells if (down_write_killable(&dvnode->validate_lock) < 0) 308b61f7dcfSDavid Howells goto error; 309b61f7dcfSDavid Howells 310b61f7dcfSDavid Howells if (!test_bit(AFS_VNODE_DIR_VALID, &dvnode->flags)) { 31199987c56SDavid Howells trace_afs_reload_dir(dvnode); 312f3ddee8dSDavid Howells ret = afs_fetch_data(dvnode, key, req); 313f3ddee8dSDavid Howells if (ret < 0) 314b61f7dcfSDavid Howells goto error_unlock; 315f3ddee8dSDavid Howells 316f3ddee8dSDavid Howells task_io_account_read(PAGE_SIZE * req->nr_pages); 317f3ddee8dSDavid Howells 318f3ddee8dSDavid Howells if (req->len < req->file_size) 319f3ddee8dSDavid Howells goto content_has_grown; 320f3ddee8dSDavid Howells 321f3ddee8dSDavid Howells /* Validate the data we just read. */ 322f3ddee8dSDavid Howells ret = -EIO; 323445b1028SDavid Howells if (!afs_dir_check_pages(dvnode, req)) 324b61f7dcfSDavid Howells goto error_unlock; 325f3ddee8dSDavid Howells 326f3ddee8dSDavid Howells // TODO: Trim excess pages 327f3ddee8dSDavid Howells 328f3ddee8dSDavid Howells set_bit(AFS_VNODE_DIR_VALID, &dvnode->flags); 329f3ddee8dSDavid Howells } 330f3ddee8dSDavid Howells 331b61f7dcfSDavid Howells downgrade_write(&dvnode->validate_lock); 332f3ddee8dSDavid Howells success: 333f3ddee8dSDavid Howells return req; 334f3ddee8dSDavid Howells 335f3ddee8dSDavid Howells error_unlock: 336b61f7dcfSDavid Howells up_write(&dvnode->validate_lock); 337f3ddee8dSDavid Howells error: 338f3ddee8dSDavid Howells afs_put_read(req); 339f3ddee8dSDavid Howells _leave(" = %d", ret); 340f3ddee8dSDavid Howells return ERR_PTR(ret); 341f3ddee8dSDavid Howells 342f3ddee8dSDavid Howells content_has_grown: 343b61f7dcfSDavid Howells up_write(&dvnode->validate_lock); 344f3ddee8dSDavid Howells afs_put_read(req); 345f3ddee8dSDavid Howells goto retry; 346f3ddee8dSDavid Howells } 347f3ddee8dSDavid Howells 348f3ddee8dSDavid Howells /* 3491da177e4SLinus Torvalds * deal with one block in an AFS directory 3501da177e4SLinus Torvalds */ 351f51375cdSDavid Howells static int afs_dir_iterate_block(struct afs_vnode *dvnode, 352f51375cdSDavid Howells struct dir_context *ctx, 35300317636SDavid Howells union afs_xdr_dir_block *block, 3541bbae9f8SAl Viro unsigned blkoff) 3551da177e4SLinus Torvalds { 35600317636SDavid Howells union afs_xdr_dirent *dire; 3571da177e4SLinus Torvalds unsigned offset, next, curr; 3581da177e4SLinus Torvalds size_t nlen; 3591bbae9f8SAl Viro int tmp; 3601da177e4SLinus Torvalds 3611bbae9f8SAl Viro _enter("%u,%x,%p,,",(unsigned)ctx->pos,blkoff,block); 3621da177e4SLinus Torvalds 36300317636SDavid Howells curr = (ctx->pos - blkoff) / sizeof(union afs_xdr_dirent); 3641da177e4SLinus Torvalds 3651da177e4SLinus Torvalds /* walk through the block, an entry at a time */ 3664ea219a8SDavid Howells for (offset = (blkoff == 0 ? AFS_DIR_RESV_BLOCKS0 : AFS_DIR_RESV_BLOCKS); 3674ea219a8SDavid Howells offset < AFS_DIR_SLOTS_PER_BLOCK; 3681da177e4SLinus Torvalds offset = next 3691da177e4SLinus Torvalds ) { 3701da177e4SLinus Torvalds next = offset + 1; 3711da177e4SLinus Torvalds 3721da177e4SLinus Torvalds /* skip entries marked unused in the bitmap */ 37300317636SDavid Howells if (!(block->hdr.bitmap[offset / 8] & 3741da177e4SLinus Torvalds (1 << (offset % 8)))) { 3755b5e0928SAlexey Dobriyan _debug("ENT[%zu.%u]: unused", 37600317636SDavid Howells blkoff / sizeof(union afs_xdr_dir_block), offset); 3771da177e4SLinus Torvalds if (offset >= curr) 3781bbae9f8SAl Viro ctx->pos = blkoff + 37900317636SDavid Howells next * sizeof(union afs_xdr_dirent); 3801da177e4SLinus Torvalds continue; 3811da177e4SLinus Torvalds } 3821da177e4SLinus Torvalds 3831da177e4SLinus Torvalds /* got a valid entry */ 3841da177e4SLinus Torvalds dire = &block->dirents[offset]; 3851da177e4SLinus Torvalds nlen = strnlen(dire->u.name, 3861da177e4SLinus Torvalds sizeof(*block) - 38700317636SDavid Howells offset * sizeof(union afs_xdr_dirent)); 3881da177e4SLinus Torvalds 3895b5e0928SAlexey Dobriyan _debug("ENT[%zu.%u]: %s %zu \"%s\"", 39000317636SDavid Howells blkoff / sizeof(union afs_xdr_dir_block), offset, 3911da177e4SLinus Torvalds (offset < curr ? "skip" : "fill"), 3921da177e4SLinus Torvalds nlen, dire->u.name); 3931da177e4SLinus Torvalds 3941da177e4SLinus Torvalds /* work out where the next possible entry is */ 39500317636SDavid Howells for (tmp = nlen; tmp > 15; tmp -= sizeof(union afs_xdr_dirent)) { 3964ea219a8SDavid Howells if (next >= AFS_DIR_SLOTS_PER_BLOCK) { 3975b5e0928SAlexey Dobriyan _debug("ENT[%zu.%u]:" 3981da177e4SLinus Torvalds " %u travelled beyond end dir block" 3995b5e0928SAlexey Dobriyan " (len %u/%zu)", 40000317636SDavid Howells blkoff / sizeof(union afs_xdr_dir_block), 4011da177e4SLinus Torvalds offset, next, tmp, nlen); 402f51375cdSDavid Howells return afs_bad(dvnode, afs_file_error_dir_over_end); 4031da177e4SLinus Torvalds } 40400317636SDavid Howells if (!(block->hdr.bitmap[next / 8] & 4051da177e4SLinus Torvalds (1 << (next % 8)))) { 4065b5e0928SAlexey Dobriyan _debug("ENT[%zu.%u]:" 4075b5e0928SAlexey Dobriyan " %u unmarked extension (len %u/%zu)", 40800317636SDavid Howells blkoff / sizeof(union afs_xdr_dir_block), 4091da177e4SLinus Torvalds offset, next, tmp, nlen); 410f51375cdSDavid Howells return afs_bad(dvnode, afs_file_error_dir_unmarked_ext); 4111da177e4SLinus Torvalds } 4121da177e4SLinus Torvalds 4135b5e0928SAlexey Dobriyan _debug("ENT[%zu.%u]: ext %u/%zu", 41400317636SDavid Howells blkoff / sizeof(union afs_xdr_dir_block), 4151da177e4SLinus Torvalds next, tmp, nlen); 4161da177e4SLinus Torvalds next++; 4171da177e4SLinus Torvalds } 4181da177e4SLinus Torvalds 4191da177e4SLinus Torvalds /* skip if starts before the current position */ 4201da177e4SLinus Torvalds if (offset < curr) 4211da177e4SLinus Torvalds continue; 4221da177e4SLinus Torvalds 4231da177e4SLinus Torvalds /* found the next entry */ 4241bbae9f8SAl Viro if (!dir_emit(ctx, dire->u.name, nlen, 4251da177e4SLinus Torvalds ntohl(dire->u.vnode), 4265cf9dd55SDavid Howells (ctx->actor == afs_lookup_filldir || 4275cf9dd55SDavid Howells ctx->actor == afs_lookup_one_filldir)? 4281bbae9f8SAl Viro ntohl(dire->u.unique) : DT_UNKNOWN)) { 4291da177e4SLinus Torvalds _leave(" = 0 [full]"); 4301da177e4SLinus Torvalds return 0; 4311da177e4SLinus Torvalds } 4321da177e4SLinus Torvalds 43300317636SDavid Howells ctx->pos = blkoff + next * sizeof(union afs_xdr_dirent); 4341da177e4SLinus Torvalds } 4351da177e4SLinus Torvalds 4361da177e4SLinus Torvalds _leave(" = 1 [more]"); 4371da177e4SLinus Torvalds return 1; 438ec26815aSDavid Howells } 4391da177e4SLinus Torvalds 4401da177e4SLinus Torvalds /* 44108e0e7c8SDavid Howells * iterate through the data blob that lists the contents of an AFS directory 4421da177e4SLinus Torvalds */ 4431bbae9f8SAl Viro static int afs_dir_iterate(struct inode *dir, struct dir_context *ctx, 4441bbae9f8SAl Viro struct key *key) 4451da177e4SLinus Torvalds { 446f3ddee8dSDavid Howells struct afs_vnode *dvnode = AFS_FS_I(dir); 44700317636SDavid Howells struct afs_xdr_dir_page *dbuf; 44800317636SDavid Howells union afs_xdr_dir_block *dblock; 449f3ddee8dSDavid Howells struct afs_read *req; 4501da177e4SLinus Torvalds struct page *page; 4511da177e4SLinus Torvalds unsigned blkoff, limit; 4521da177e4SLinus Torvalds int ret; 4531da177e4SLinus Torvalds 4541bbae9f8SAl Viro _enter("{%lu},%u,,", dir->i_ino, (unsigned)ctx->pos); 4551da177e4SLinus Torvalds 45608e0e7c8SDavid Howells if (test_bit(AFS_VNODE_DELETED, &AFS_FS_I(dir)->flags)) { 4571da177e4SLinus Torvalds _leave(" = -ESTALE"); 4581da177e4SLinus Torvalds return -ESTALE; 4591da177e4SLinus Torvalds } 4601da177e4SLinus Torvalds 461f3ddee8dSDavid Howells req = afs_read_dir(dvnode, key); 462f3ddee8dSDavid Howells if (IS_ERR(req)) 463f3ddee8dSDavid Howells return PTR_ERR(req); 464f3ddee8dSDavid Howells 4651da177e4SLinus Torvalds /* round the file position up to the next entry boundary */ 46600317636SDavid Howells ctx->pos += sizeof(union afs_xdr_dirent) - 1; 46700317636SDavid Howells ctx->pos &= ~(sizeof(union afs_xdr_dirent) - 1); 4681da177e4SLinus Torvalds 4691da177e4SLinus Torvalds /* walk through the blocks in sequence */ 4701da177e4SLinus Torvalds ret = 0; 471f3ddee8dSDavid Howells while (ctx->pos < req->actual_len) { 47200317636SDavid Howells blkoff = ctx->pos & ~(sizeof(union afs_xdr_dir_block) - 1); 4731da177e4SLinus Torvalds 474f3ddee8dSDavid Howells /* Fetch the appropriate page from the directory and re-add it 475f3ddee8dSDavid Howells * to the LRU. 476f3ddee8dSDavid Howells */ 477f3ddee8dSDavid Howells page = req->pages[blkoff / PAGE_SIZE]; 478f3ddee8dSDavid Howells if (!page) { 479f51375cdSDavid Howells ret = afs_bad(dvnode, afs_file_error_dir_missing_page); 4801da177e4SLinus Torvalds break; 4811da177e4SLinus Torvalds } 482f3ddee8dSDavid Howells mark_page_accessed(page); 4831da177e4SLinus Torvalds 4841da177e4SLinus Torvalds limit = blkoff & ~(PAGE_SIZE - 1); 4851da177e4SLinus Torvalds 486f3ddee8dSDavid Howells dbuf = kmap(page); 4871da177e4SLinus Torvalds 4881da177e4SLinus Torvalds /* deal with the individual blocks stashed on this page */ 4891da177e4SLinus Torvalds do { 4901da177e4SLinus Torvalds dblock = &dbuf->blocks[(blkoff % PAGE_SIZE) / 49100317636SDavid Howells sizeof(union afs_xdr_dir_block)]; 492f51375cdSDavid Howells ret = afs_dir_iterate_block(dvnode, ctx, dblock, blkoff); 4931da177e4SLinus Torvalds if (ret != 1) { 494f3ddee8dSDavid Howells kunmap(page); 4951da177e4SLinus Torvalds goto out; 4961da177e4SLinus Torvalds } 4971da177e4SLinus Torvalds 49800317636SDavid Howells blkoff += sizeof(union afs_xdr_dir_block); 4991da177e4SLinus Torvalds 5001bbae9f8SAl Viro } while (ctx->pos < dir->i_size && blkoff < limit); 5011da177e4SLinus Torvalds 502f3ddee8dSDavid Howells kunmap(page); 5031da177e4SLinus Torvalds ret = 0; 5041da177e4SLinus Torvalds } 5051da177e4SLinus Torvalds 5061da177e4SLinus Torvalds out: 507b61f7dcfSDavid Howells up_read(&dvnode->validate_lock); 508f3ddee8dSDavid Howells afs_put_read(req); 5091da177e4SLinus Torvalds _leave(" = %d", ret); 5101da177e4SLinus Torvalds return ret; 511ec26815aSDavid Howells } 5121da177e4SLinus Torvalds 5131da177e4SLinus Torvalds /* 5141da177e4SLinus Torvalds * read an AFS directory 5151da177e4SLinus Torvalds */ 5161bbae9f8SAl Viro static int afs_readdir(struct file *file, struct dir_context *ctx) 5171da177e4SLinus Torvalds { 518215804a9SDavid Howells return afs_dir_iterate(file_inode(file), ctx, afs_file_key(file)); 519ec26815aSDavid Howells } 5201da177e4SLinus Torvalds 5211da177e4SLinus Torvalds /* 5225cf9dd55SDavid Howells * Search the directory for a single name 5231da177e4SLinus Torvalds * - if afs_dir_iterate_block() spots this function, it'll pass the FID 5241da177e4SLinus Torvalds * uniquifier through dtype 5251da177e4SLinus Torvalds */ 5265cf9dd55SDavid Howells static int afs_lookup_one_filldir(struct dir_context *ctx, const char *name, 527ac7576f4SMiklos Szeredi int nlen, loff_t fpos, u64 ino, unsigned dtype) 5281da177e4SLinus Torvalds { 5295cf9dd55SDavid Howells struct afs_lookup_one_cookie *cookie = 5305cf9dd55SDavid Howells container_of(ctx, struct afs_lookup_one_cookie, ctx); 5311da177e4SLinus Torvalds 5321bbae9f8SAl Viro _enter("{%s,%u},%s,%u,,%llu,%u", 5331bbae9f8SAl Viro cookie->name.name, cookie->name.len, name, nlen, 534ba3e0e1aSDavid S. Miller (unsigned long long) ino, dtype); 5351da177e4SLinus Torvalds 53608e0e7c8SDavid Howells /* insanity checks first */ 53700317636SDavid Howells BUILD_BUG_ON(sizeof(union afs_xdr_dir_block) != 2048); 53800317636SDavid Howells BUILD_BUG_ON(sizeof(union afs_xdr_dirent) != 32); 53908e0e7c8SDavid Howells 5401bbae9f8SAl Viro if (cookie->name.len != nlen || 5411bbae9f8SAl Viro memcmp(cookie->name.name, name, nlen) != 0) { 5421da177e4SLinus Torvalds _leave(" = 0 [no]"); 5431da177e4SLinus Torvalds return 0; 5441da177e4SLinus Torvalds } 5451da177e4SLinus Torvalds 5461da177e4SLinus Torvalds cookie->fid.vnode = ino; 5471da177e4SLinus Torvalds cookie->fid.unique = dtype; 5481da177e4SLinus Torvalds cookie->found = 1; 5491da177e4SLinus Torvalds 5501da177e4SLinus Torvalds _leave(" = -1 [found]"); 5511da177e4SLinus Torvalds return -1; 552ec26815aSDavid Howells } 5531da177e4SLinus Torvalds 5541da177e4SLinus Torvalds /* 5555cf9dd55SDavid Howells * Do a lookup of a single name in a directory 556260a9803SDavid Howells * - just returns the FID the dentry name maps to if found 5571da177e4SLinus Torvalds */ 5585cf9dd55SDavid Howells static int afs_do_lookup_one(struct inode *dir, struct dentry *dentry, 55900d3b7a4SDavid Howells struct afs_fid *fid, struct key *key) 5601da177e4SLinus Torvalds { 5611bbae9f8SAl Viro struct afs_super_info *as = dir->i_sb->s_fs_info; 5625cf9dd55SDavid Howells struct afs_lookup_one_cookie cookie = { 5635cf9dd55SDavid Howells .ctx.actor = afs_lookup_one_filldir, 5641bbae9f8SAl Viro .name = dentry->d_name, 5651bbae9f8SAl Viro .fid.vid = as->volume->vid 5661bbae9f8SAl Viro }; 5671da177e4SLinus Torvalds int ret; 5681da177e4SLinus Torvalds 569a455589fSAl Viro _enter("{%lu},%p{%pd},", dir->i_ino, dentry, dentry); 5701da177e4SLinus Torvalds 5711da177e4SLinus Torvalds /* search the directory */ 5721bbae9f8SAl Viro ret = afs_dir_iterate(dir, &cookie.ctx, key); 5731da177e4SLinus Torvalds if (ret < 0) { 57408e0e7c8SDavid Howells _leave(" = %d [iter]", ret); 57508e0e7c8SDavid Howells return ret; 5761da177e4SLinus Torvalds } 5771da177e4SLinus Torvalds 5781da177e4SLinus Torvalds ret = -ENOENT; 5791da177e4SLinus Torvalds if (!cookie.found) { 58008e0e7c8SDavid Howells _leave(" = -ENOENT [not found]"); 58108e0e7c8SDavid Howells return -ENOENT; 58208e0e7c8SDavid Howells } 58308e0e7c8SDavid Howells 58408e0e7c8SDavid Howells *fid = cookie.fid; 5853b6492dfSDavid Howells _leave(" = 0 { vn=%llu u=%u }", fid->vnode, fid->unique); 58608e0e7c8SDavid Howells return 0; 58708e0e7c8SDavid Howells } 58808e0e7c8SDavid Howells 58908e0e7c8SDavid Howells /* 5905cf9dd55SDavid Howells * search the directory for a name 5915cf9dd55SDavid Howells * - if afs_dir_iterate_block() spots this function, it'll pass the FID 5925cf9dd55SDavid Howells * uniquifier through dtype 5935cf9dd55SDavid Howells */ 5945cf9dd55SDavid Howells static int afs_lookup_filldir(struct dir_context *ctx, const char *name, 5955cf9dd55SDavid Howells int nlen, loff_t fpos, u64 ino, unsigned dtype) 5965cf9dd55SDavid Howells { 5975cf9dd55SDavid Howells struct afs_lookup_cookie *cookie = 5985cf9dd55SDavid Howells container_of(ctx, struct afs_lookup_cookie, ctx); 5995cf9dd55SDavid Howells int ret; 6005cf9dd55SDavid Howells 6015cf9dd55SDavid Howells _enter("{%s,%u},%s,%u,,%llu,%u", 6025cf9dd55SDavid Howells cookie->name.name, cookie->name.len, name, nlen, 6035cf9dd55SDavid Howells (unsigned long long) ino, dtype); 6045cf9dd55SDavid Howells 6055cf9dd55SDavid Howells /* insanity checks first */ 60600317636SDavid Howells BUILD_BUG_ON(sizeof(union afs_xdr_dir_block) != 2048); 60700317636SDavid Howells BUILD_BUG_ON(sizeof(union afs_xdr_dirent) != 32); 6085cf9dd55SDavid Howells 6095cf9dd55SDavid Howells if (cookie->found) { 6105cf9dd55SDavid Howells if (cookie->nr_fids < 50) { 6115cf9dd55SDavid Howells cookie->fids[cookie->nr_fids].vnode = ino; 6125cf9dd55SDavid Howells cookie->fids[cookie->nr_fids].unique = dtype; 6135cf9dd55SDavid Howells cookie->nr_fids++; 6145cf9dd55SDavid Howells } 6155cf9dd55SDavid Howells } else if (cookie->name.len == nlen && 6165cf9dd55SDavid Howells memcmp(cookie->name.name, name, nlen) == 0) { 6175cf9dd55SDavid Howells cookie->fids[0].vnode = ino; 6185cf9dd55SDavid Howells cookie->fids[0].unique = dtype; 6195cf9dd55SDavid Howells cookie->found = 1; 6205cf9dd55SDavid Howells if (cookie->one_only) 6215cf9dd55SDavid Howells return -1; 6225cf9dd55SDavid Howells } 6235cf9dd55SDavid Howells 6245cf9dd55SDavid Howells ret = cookie->nr_fids >= 50 ? -1 : 0; 6255cf9dd55SDavid Howells _leave(" = %d", ret); 6265cf9dd55SDavid Howells return ret; 6275cf9dd55SDavid Howells } 6285cf9dd55SDavid Howells 6295cf9dd55SDavid Howells /* 6305cf9dd55SDavid Howells * Do a lookup in a directory. We make use of bulk lookup to query a slew of 6315cf9dd55SDavid Howells * files in one go and create inodes for them. The inode of the file we were 6325cf9dd55SDavid Howells * asked for is returned. 6335cf9dd55SDavid Howells */ 6345cf9dd55SDavid Howells static struct inode *afs_do_lookup(struct inode *dir, struct dentry *dentry, 6355cf9dd55SDavid Howells struct key *key) 6365cf9dd55SDavid Howells { 6375cf9dd55SDavid Howells struct afs_lookup_cookie *cookie; 638f642404aSDavid Howells struct afs_cb_interest *dcbi, *cbi = NULL; 6395cf9dd55SDavid Howells struct afs_super_info *as = dir->i_sb->s_fs_info; 64087182759SDavid Howells struct afs_status_cb *scb; 641b8359153SDavid Howells struct afs_iget_data iget_data; 6425cf9dd55SDavid Howells struct afs_fs_cursor fc; 643f642404aSDavid Howells struct afs_server *server; 64439db9815SDavid Howells struct afs_vnode *dvnode = AFS_FS_I(dir), *vnode; 64539db9815SDavid Howells struct inode *inode = NULL, *ti; 6465cf9dd55SDavid Howells int ret, i; 6475cf9dd55SDavid Howells 6485cf9dd55SDavid Howells _enter("{%lu},%p{%pd},", dir->i_ino, dentry, dentry); 6495cf9dd55SDavid Howells 6505cf9dd55SDavid Howells cookie = kzalloc(sizeof(struct afs_lookup_cookie), GFP_KERNEL); 6515cf9dd55SDavid Howells if (!cookie) 6525cf9dd55SDavid Howells return ERR_PTR(-ENOMEM); 6535cf9dd55SDavid Howells 6545cf9dd55SDavid Howells cookie->ctx.actor = afs_lookup_filldir; 6555cf9dd55SDavid Howells cookie->name = dentry->d_name; 6565cf9dd55SDavid Howells cookie->nr_fids = 1; /* slot 0 is saved for the fid we actually want */ 6575cf9dd55SDavid Howells 6585cf9dd55SDavid Howells read_seqlock_excl(&dvnode->cb_lock); 659f642404aSDavid Howells dcbi = rcu_dereference_protected(dvnode->cb_interest, 660f642404aSDavid Howells lockdep_is_held(&dvnode->cb_lock.lock)); 661f642404aSDavid Howells if (dcbi) { 662f642404aSDavid Howells server = dcbi->server; 663f642404aSDavid Howells if (server && 664f642404aSDavid Howells test_bit(AFS_SERVER_FL_NO_IBULK, &server->flags)) 6655cf9dd55SDavid Howells cookie->one_only = true; 666f642404aSDavid Howells } 6675cf9dd55SDavid Howells read_sequnlock_excl(&dvnode->cb_lock); 6685cf9dd55SDavid Howells 6695cf9dd55SDavid Howells for (i = 0; i < 50; i++) 6705cf9dd55SDavid Howells cookie->fids[i].vid = as->volume->vid; 6715cf9dd55SDavid Howells 6725cf9dd55SDavid Howells /* search the directory */ 6735cf9dd55SDavid Howells ret = afs_dir_iterate(dir, &cookie->ctx, key); 6745cf9dd55SDavid Howells if (ret < 0) { 6755cf9dd55SDavid Howells inode = ERR_PTR(ret); 6765cf9dd55SDavid Howells goto out; 6775cf9dd55SDavid Howells } 6785cf9dd55SDavid Howells 6795cf9dd55SDavid Howells inode = ERR_PTR(-ENOENT); 6805cf9dd55SDavid Howells if (!cookie->found) 6815cf9dd55SDavid Howells goto out; 6825cf9dd55SDavid Howells 6835cf9dd55SDavid Howells /* Check to see if we already have an inode for the primary fid. */ 684b8359153SDavid Howells iget_data.fid = cookie->fids[0]; 685b8359153SDavid Howells iget_data.volume = dvnode->volume; 686b8359153SDavid Howells iget_data.cb_v_break = dvnode->volume->cb_v_break; 687b8359153SDavid Howells iget_data.cb_s_break = 0; 688b8359153SDavid Howells inode = ilookup5(dir->i_sb, cookie->fids[0].vnode, 689b8359153SDavid Howells afs_iget5_test, &iget_data); 6905cf9dd55SDavid Howells if (inode) 6915cf9dd55SDavid Howells goto out; 6925cf9dd55SDavid Howells 6935cf9dd55SDavid Howells /* Need space for examining all the selected files */ 6945cf9dd55SDavid Howells inode = ERR_PTR(-ENOMEM); 69587182759SDavid Howells cookie->statuses = kvcalloc(cookie->nr_fids, sizeof(struct afs_status_cb), 6965cf9dd55SDavid Howells GFP_KERNEL); 6975cf9dd55SDavid Howells if (!cookie->statuses) 6985cf9dd55SDavid Howells goto out; 6995cf9dd55SDavid Howells 70039db9815SDavid Howells cookie->inodes = kcalloc(cookie->nr_fids, sizeof(struct inode *), 70139db9815SDavid Howells GFP_KERNEL); 70239db9815SDavid Howells if (!cookie->inodes) 70339db9815SDavid Howells goto out_s; 70439db9815SDavid Howells 70539db9815SDavid Howells for (i = 1; i < cookie->nr_fids; i++) { 70639db9815SDavid Howells scb = &cookie->statuses[i]; 70739db9815SDavid Howells 70839db9815SDavid Howells /* Find any inodes that already exist and get their 70939db9815SDavid Howells * callback counters. 71039db9815SDavid Howells */ 71139db9815SDavid Howells iget_data.fid = cookie->fids[i]; 71239db9815SDavid Howells ti = ilookup5_nowait(dir->i_sb, iget_data.fid.vnode, 71339db9815SDavid Howells afs_iget5_test, &iget_data); 71439db9815SDavid Howells if (!IS_ERR_OR_NULL(ti)) { 71539db9815SDavid Howells vnode = AFS_FS_I(ti); 71639db9815SDavid Howells scb->cb_break = afs_calc_vnode_cb_break(vnode); 71739db9815SDavid Howells cookie->inodes[i] = ti; 71839db9815SDavid Howells } 71939db9815SDavid Howells } 72039db9815SDavid Howells 7215cf9dd55SDavid Howells /* Try FS.InlineBulkStatus first. Abort codes for the individual 7225cf9dd55SDavid Howells * lookups contained therein are stored in the reply without aborting 7235cf9dd55SDavid Howells * the whole operation. 7245cf9dd55SDavid Howells */ 7255cf9dd55SDavid Howells if (cookie->one_only) 7265cf9dd55SDavid Howells goto no_inline_bulk_status; 7275cf9dd55SDavid Howells 7285cf9dd55SDavid Howells inode = ERR_PTR(-ERESTARTSYS); 72920b8391fSDavid Howells if (afs_begin_vnode_operation(&fc, dvnode, key, true)) { 7305cf9dd55SDavid Howells while (afs_select_fileserver(&fc)) { 7315cf9dd55SDavid Howells if (test_bit(AFS_SERVER_FL_NO_IBULK, 7325cf9dd55SDavid Howells &fc.cbi->server->flags)) { 7335cf9dd55SDavid Howells fc.ac.abort_code = RX_INVALID_OPERATION; 7345cf9dd55SDavid Howells fc.ac.error = -ECONNABORTED; 7355cf9dd55SDavid Howells break; 7365cf9dd55SDavid Howells } 737b8359153SDavid Howells iget_data.cb_v_break = dvnode->volume->cb_v_break; 738b8359153SDavid Howells iget_data.cb_s_break = fc.cbi->server->cb_s_break; 7395cf9dd55SDavid Howells afs_fs_inline_bulk_status(&fc, 7405cf9dd55SDavid Howells afs_v2net(dvnode), 7415cf9dd55SDavid Howells cookie->fids, 7425cf9dd55SDavid Howells cookie->statuses, 7435cf9dd55SDavid Howells cookie->nr_fids, NULL); 7445cf9dd55SDavid Howells } 7455cf9dd55SDavid Howells 7465cf9dd55SDavid Howells if (fc.ac.error == 0) 7475cf9dd55SDavid Howells cbi = afs_get_cb_interest(fc.cbi); 7485cf9dd55SDavid Howells if (fc.ac.abort_code == RX_INVALID_OPERATION) 7495cf9dd55SDavid Howells set_bit(AFS_SERVER_FL_NO_IBULK, &fc.cbi->server->flags); 7505cf9dd55SDavid Howells inode = ERR_PTR(afs_end_vnode_operation(&fc)); 7515cf9dd55SDavid Howells } 7525cf9dd55SDavid Howells 7535cf9dd55SDavid Howells if (!IS_ERR(inode)) 7545cf9dd55SDavid Howells goto success; 7555cf9dd55SDavid Howells if (fc.ac.abort_code != RX_INVALID_OPERATION) 7565cf9dd55SDavid Howells goto out_c; 7575cf9dd55SDavid Howells 7585cf9dd55SDavid Howells no_inline_bulk_status: 7595cf9dd55SDavid Howells /* We could try FS.BulkStatus next, but this aborts the entire op if 7605cf9dd55SDavid Howells * any of the lookups fails - so, for the moment, revert to 7615cf9dd55SDavid Howells * FS.FetchStatus for just the primary fid. 7625cf9dd55SDavid Howells */ 7635cf9dd55SDavid Howells inode = ERR_PTR(-ERESTARTSYS); 76420b8391fSDavid Howells if (afs_begin_vnode_operation(&fc, dvnode, key, true)) { 7655cf9dd55SDavid Howells while (afs_select_fileserver(&fc)) { 766b8359153SDavid Howells iget_data.cb_v_break = dvnode->volume->cb_v_break; 767b8359153SDavid Howells iget_data.cb_s_break = fc.cbi->server->cb_s_break; 76887182759SDavid Howells scb = &cookie->statuses[0]; 7695cf9dd55SDavid Howells afs_fs_fetch_status(&fc, 7705cf9dd55SDavid Howells afs_v2net(dvnode), 7715cf9dd55SDavid Howells cookie->fids, 772a58823acSDavid Howells scb, 7735cf9dd55SDavid Howells NULL); 7745cf9dd55SDavid Howells } 7755cf9dd55SDavid Howells 7765cf9dd55SDavid Howells if (fc.ac.error == 0) 7775cf9dd55SDavid Howells cbi = afs_get_cb_interest(fc.cbi); 7785cf9dd55SDavid Howells inode = ERR_PTR(afs_end_vnode_operation(&fc)); 7795cf9dd55SDavid Howells } 7805cf9dd55SDavid Howells 7815cf9dd55SDavid Howells if (IS_ERR(inode)) 7825cf9dd55SDavid Howells goto out_c; 7835cf9dd55SDavid Howells 7845cf9dd55SDavid Howells success: 7855cf9dd55SDavid Howells /* Turn all the files into inodes and save the first one - which is the 7865cf9dd55SDavid Howells * one we actually want. 7875cf9dd55SDavid Howells */ 78887182759SDavid Howells scb = &cookie->statuses[0]; 78987182759SDavid Howells if (scb->status.abort_code != 0) 79087182759SDavid Howells inode = ERR_PTR(afs_abort_to_error(scb->status.abort_code)); 7915cf9dd55SDavid Howells 7925cf9dd55SDavid Howells for (i = 0; i < cookie->nr_fids; i++) { 79387182759SDavid Howells struct afs_status_cb *scb = &cookie->statuses[i]; 79439db9815SDavid Howells 79539db9815SDavid Howells if (!scb->have_status && !scb->have_error) 79639db9815SDavid Howells continue; 79739db9815SDavid Howells 79839db9815SDavid Howells if (cookie->inodes[i]) { 79939db9815SDavid Howells afs_vnode_commit_status(&fc, AFS_FS_I(cookie->inodes[i]), 80039db9815SDavid Howells scb->cb_break, NULL, scb); 80139db9815SDavid Howells continue; 80239db9815SDavid Howells } 8035cf9dd55SDavid Howells 80487182759SDavid Howells if (scb->status.abort_code != 0) 8055cf9dd55SDavid Howells continue; 8065cf9dd55SDavid Howells 807b8359153SDavid Howells iget_data.fid = cookie->fids[i]; 808b8359153SDavid Howells ti = afs_iget(dir->i_sb, key, &iget_data, scb, cbi, dvnode); 80939db9815SDavid Howells if (!IS_ERR(ti)) 81039db9815SDavid Howells afs_cache_permit(AFS_FS_I(ti), key, 81139db9815SDavid Howells 0 /* Assume vnode->cb_break is 0 */ + 81239db9815SDavid Howells iget_data.cb_v_break, 81339db9815SDavid Howells scb); 8145cf9dd55SDavid Howells if (i == 0) { 8155cf9dd55SDavid Howells inode = ti; 8165cf9dd55SDavid Howells } else { 8175cf9dd55SDavid Howells if (!IS_ERR(ti)) 8185cf9dd55SDavid Howells iput(ti); 8195cf9dd55SDavid Howells } 8205cf9dd55SDavid Howells } 8215cf9dd55SDavid Howells 8225cf9dd55SDavid Howells out_c: 8235cf9dd55SDavid Howells afs_put_cb_interest(afs_v2net(dvnode), cbi); 82439db9815SDavid Howells if (cookie->inodes) { 82539db9815SDavid Howells for (i = 0; i < cookie->nr_fids; i++) 82639db9815SDavid Howells iput(cookie->inodes[i]); 82739db9815SDavid Howells kfree(cookie->inodes); 82839db9815SDavid Howells } 82939db9815SDavid Howells out_s: 83087182759SDavid Howells kvfree(cookie->statuses); 8315cf9dd55SDavid Howells out: 8325cf9dd55SDavid Howells kfree(cookie); 8335cf9dd55SDavid Howells return inode; 8345cf9dd55SDavid Howells } 8355cf9dd55SDavid Howells 8365cf9dd55SDavid Howells /* 8376f8880d8SDavid Howells * Look up an entry in a directory with @sys substitution. 8386f8880d8SDavid Howells */ 8396f8880d8SDavid Howells static struct dentry *afs_lookup_atsys(struct inode *dir, struct dentry *dentry, 8406f8880d8SDavid Howells struct key *key) 8416f8880d8SDavid Howells { 8426f8880d8SDavid Howells struct afs_sysnames *subs; 8436f8880d8SDavid Howells struct afs_net *net = afs_i2net(dir); 8446f8880d8SDavid Howells struct dentry *ret; 8456f8880d8SDavid Howells char *buf, *p, *name; 8466f8880d8SDavid Howells int len, i; 8476f8880d8SDavid Howells 8486f8880d8SDavid Howells _enter(""); 8496f8880d8SDavid Howells 8506f8880d8SDavid Howells ret = ERR_PTR(-ENOMEM); 8516f8880d8SDavid Howells p = buf = kmalloc(AFSNAMEMAX, GFP_KERNEL); 8526f8880d8SDavid Howells if (!buf) 8536f8880d8SDavid Howells goto out_p; 8546f8880d8SDavid Howells if (dentry->d_name.len > 4) { 8556f8880d8SDavid Howells memcpy(p, dentry->d_name.name, dentry->d_name.len - 4); 8566f8880d8SDavid Howells p += dentry->d_name.len - 4; 8576f8880d8SDavid Howells } 8586f8880d8SDavid Howells 8596f8880d8SDavid Howells /* There is an ordered list of substitutes that we have to try. */ 8606f8880d8SDavid Howells read_lock(&net->sysnames_lock); 8616f8880d8SDavid Howells subs = net->sysnames; 8626f8880d8SDavid Howells refcount_inc(&subs->usage); 8636f8880d8SDavid Howells read_unlock(&net->sysnames_lock); 8646f8880d8SDavid Howells 8656f8880d8SDavid Howells for (i = 0; i < subs->nr; i++) { 8666f8880d8SDavid Howells name = subs->subs[i]; 8676f8880d8SDavid Howells len = dentry->d_name.len - 4 + strlen(name); 8686f8880d8SDavid Howells if (len >= AFSNAMEMAX) { 8696f8880d8SDavid Howells ret = ERR_PTR(-ENAMETOOLONG); 8706f8880d8SDavid Howells goto out_s; 8716f8880d8SDavid Howells } 8726f8880d8SDavid Howells 8736f8880d8SDavid Howells strcpy(p, name); 8746f8880d8SDavid Howells ret = lookup_one_len(buf, dentry->d_parent, len); 8756f8880d8SDavid Howells if (IS_ERR(ret) || d_is_positive(ret)) 8766f8880d8SDavid Howells goto out_s; 8776f8880d8SDavid Howells dput(ret); 8786f8880d8SDavid Howells } 8796f8880d8SDavid Howells 8806f8880d8SDavid Howells /* We don't want to d_add() the @sys dentry here as we don't want to 8816f8880d8SDavid Howells * the cached dentry to hide changes to the sysnames list. 8826f8880d8SDavid Howells */ 8836f8880d8SDavid Howells ret = NULL; 8846f8880d8SDavid Howells out_s: 8856f8880d8SDavid Howells afs_put_sysnames(subs); 8866f8880d8SDavid Howells kfree(buf); 8876f8880d8SDavid Howells out_p: 8886f8880d8SDavid Howells key_put(key); 8896f8880d8SDavid Howells return ret; 8906f8880d8SDavid Howells } 8916f8880d8SDavid Howells 8926f8880d8SDavid Howells /* 89308e0e7c8SDavid Howells * look up an entry in a directory 89408e0e7c8SDavid Howells */ 895260a9803SDavid Howells static struct dentry *afs_lookup(struct inode *dir, struct dentry *dentry, 89600cd8dd3SAl Viro unsigned int flags) 89708e0e7c8SDavid Howells { 8985cf9dd55SDavid Howells struct afs_vnode *dvnode = AFS_FS_I(dir); 89908e0e7c8SDavid Howells struct inode *inode; 90034b2a88fSAl Viro struct dentry *d; 90100d3b7a4SDavid Howells struct key *key; 90208e0e7c8SDavid Howells int ret; 90308e0e7c8SDavid Howells 9043b6492dfSDavid Howells _enter("{%llx:%llu},%p{%pd},", 9055cf9dd55SDavid Howells dvnode->fid.vid, dvnode->fid.vnode, dentry, dentry); 906260a9803SDavid Howells 9072b0143b5SDavid Howells ASSERTCMP(d_inode(dentry), ==, NULL); 90808e0e7c8SDavid Howells 90945222b9eSDavid Howells if (dentry->d_name.len >= AFSNAMEMAX) { 91008e0e7c8SDavid Howells _leave(" = -ENAMETOOLONG"); 91108e0e7c8SDavid Howells return ERR_PTR(-ENAMETOOLONG); 91208e0e7c8SDavid Howells } 91308e0e7c8SDavid Howells 9145cf9dd55SDavid Howells if (test_bit(AFS_VNODE_DELETED, &dvnode->flags)) { 91508e0e7c8SDavid Howells _leave(" = -ESTALE"); 91608e0e7c8SDavid Howells return ERR_PTR(-ESTALE); 91708e0e7c8SDavid Howells } 91808e0e7c8SDavid Howells 9195cf9dd55SDavid Howells key = afs_request_key(dvnode->volume->cell); 92000d3b7a4SDavid Howells if (IS_ERR(key)) { 92100d3b7a4SDavid Howells _leave(" = %ld [key]", PTR_ERR(key)); 922e231c2eeSDavid Howells return ERR_CAST(key); 92300d3b7a4SDavid Howells } 92400d3b7a4SDavid Howells 9255cf9dd55SDavid Howells ret = afs_validate(dvnode, key); 92608e0e7c8SDavid Howells if (ret < 0) { 92700d3b7a4SDavid Howells key_put(key); 928260a9803SDavid Howells _leave(" = %d [val]", ret); 9291da177e4SLinus Torvalds return ERR_PTR(ret); 9301da177e4SLinus Torvalds } 9311da177e4SLinus Torvalds 9326f8880d8SDavid Howells if (dentry->d_name.len >= 4 && 9336f8880d8SDavid Howells dentry->d_name.name[dentry->d_name.len - 4] == '@' && 9346f8880d8SDavid Howells dentry->d_name.name[dentry->d_name.len - 3] == 's' && 9356f8880d8SDavid Howells dentry->d_name.name[dentry->d_name.len - 2] == 'y' && 9366f8880d8SDavid Howells dentry->d_name.name[dentry->d_name.len - 1] == 's') 9376f8880d8SDavid Howells return afs_lookup_atsys(dir, dentry, key); 9386f8880d8SDavid Howells 939d55b4da4SDavid Howells afs_stat_v(dvnode, n_lookup); 9405cf9dd55SDavid Howells inode = afs_do_lookup(dir, dentry, key); 94134b2a88fSAl Viro key_put(key); 94234b2a88fSAl Viro if (inode == ERR_PTR(-ENOENT)) { 9435cf9dd55SDavid Howells inode = afs_try_auto_mntpt(dentry, dir); 94434b2a88fSAl Viro } else { 94534b2a88fSAl Viro dentry->d_fsdata = 94634b2a88fSAl Viro (void *)(unsigned long)dvnode->status.data_version; 947bec5eb61Swanglei } 94834b2a88fSAl Viro d = d_splice_alias(inode, dentry); 94980548b03SDavid Howells if (!IS_ERR_OR_NULL(d)) { 95034b2a88fSAl Viro d->d_fsdata = dentry->d_fsdata; 95180548b03SDavid Howells trace_afs_lookup(dvnode, &d->d_name, 95280548b03SDavid Howells inode ? AFS_FS_I(inode) : NULL); 95380548b03SDavid Howells } else { 95480548b03SDavid Howells trace_afs_lookup(dvnode, &dentry->d_name, 95580548b03SDavid Howells inode ? AFS_FS_I(inode) : NULL); 95680548b03SDavid Howells } 95734b2a88fSAl Viro return d; 958ec26815aSDavid Howells } 9591da177e4SLinus Torvalds 9601da177e4SLinus Torvalds /* 9611da177e4SLinus Torvalds * check that a dentry lookup hit has found a valid entry 9621da177e4SLinus Torvalds * - NOTE! the hit can be a negative hit too, so we can't assume we have an 9631da177e4SLinus Torvalds * inode 9641da177e4SLinus Torvalds */ 9650b728e19SAl Viro static int afs_d_revalidate(struct dentry *dentry, unsigned int flags) 9661da177e4SLinus Torvalds { 967260a9803SDavid Howells struct afs_vnode *vnode, *dir; 968dd0d9a46SArtem Bityutskiy struct afs_fid uninitialized_var(fid); 9691da177e4SLinus Torvalds struct dentry *parent; 970c435ee34SDavid Howells struct inode *inode; 97100d3b7a4SDavid Howells struct key *key; 972a4ff7401SDavid Howells long dir_version, de_version; 9731da177e4SLinus Torvalds int ret; 9741da177e4SLinus Torvalds 9750b728e19SAl Viro if (flags & LOOKUP_RCU) 97634286d66SNick Piggin return -ECHILD; 97734286d66SNick Piggin 978c435ee34SDavid Howells if (d_really_is_positive(dentry)) { 9792b0143b5SDavid Howells vnode = AFS_FS_I(d_inode(dentry)); 9803b6492dfSDavid Howells _enter("{v={%llx:%llu} n=%pd fl=%lx},", 981a455589fSAl Viro vnode->fid.vid, vnode->fid.vnode, dentry, 982260a9803SDavid Howells vnode->flags); 983c435ee34SDavid Howells } else { 984a455589fSAl Viro _enter("{neg n=%pd}", dentry); 985c435ee34SDavid Howells } 9861da177e4SLinus Torvalds 987260a9803SDavid Howells key = afs_request_key(AFS_FS_S(dentry->d_sb)->volume->cell); 98800d3b7a4SDavid Howells if (IS_ERR(key)) 98900d3b7a4SDavid Howells key = NULL; 99000d3b7a4SDavid Howells 991c435ee34SDavid Howells if (d_really_is_positive(dentry)) { 992c435ee34SDavid Howells inode = d_inode(dentry); 993c435ee34SDavid Howells if (inode) { 994c435ee34SDavid Howells vnode = AFS_FS_I(inode); 995c435ee34SDavid Howells afs_validate(vnode, key); 996c435ee34SDavid Howells if (test_bit(AFS_VNODE_DELETED, &vnode->flags)) 997c435ee34SDavid Howells goto out_bad; 998c435ee34SDavid Howells } 999c435ee34SDavid Howells } 1000c435ee34SDavid Howells 10011da177e4SLinus Torvalds /* lock down the parent dentry so we can peer at it */ 100208e0e7c8SDavid Howells parent = dget_parent(dentry); 10032b0143b5SDavid Howells dir = AFS_FS_I(d_inode(parent)); 10041da177e4SLinus Torvalds 1005260a9803SDavid Howells /* validate the parent directory */ 1006260a9803SDavid Howells afs_validate(dir, key); 1007260a9803SDavid Howells 1008260a9803SDavid Howells if (test_bit(AFS_VNODE_DELETED, &dir->flags)) { 1009a455589fSAl Viro _debug("%pd: parent dir deleted", dentry); 1010c435ee34SDavid Howells goto out_bad_parent; 10111da177e4SLinus Torvalds } 10121da177e4SLinus Torvalds 1013a4ff7401SDavid Howells /* We only need to invalidate a dentry if the server's copy changed 1014a4ff7401SDavid Howells * behind our back. If we made the change, it's no problem. Note that 1015a4ff7401SDavid Howells * on a 32-bit system, we only have 32 bits in the dentry to store the 1016a4ff7401SDavid Howells * version. 1017a4ff7401SDavid Howells */ 1018a4ff7401SDavid Howells dir_version = (long)dir->status.data_version; 1019a4ff7401SDavid Howells de_version = (long)dentry->d_fsdata; 1020a4ff7401SDavid Howells if (de_version == dir_version) 1021a4ff7401SDavid Howells goto out_valid; 1022a4ff7401SDavid Howells 1023a4ff7401SDavid Howells dir_version = (long)dir->invalid_before; 1024a4ff7401SDavid Howells if (de_version - dir_version >= 0) 1025a4ff7401SDavid Howells goto out_valid; 1026260a9803SDavid Howells 102708e0e7c8SDavid Howells _debug("dir modified"); 1028d55b4da4SDavid Howells afs_stat_v(dir, n_reval); 10291da177e4SLinus Torvalds 10301da177e4SLinus Torvalds /* search the directory for this vnode */ 10315cf9dd55SDavid Howells ret = afs_do_lookup_one(&dir->vfs_inode, dentry, &fid, key); 1032260a9803SDavid Howells switch (ret) { 1033260a9803SDavid Howells case 0: 1034260a9803SDavid Howells /* the filename maps to something */ 10352b0143b5SDavid Howells if (d_really_is_negative(dentry)) 1036c435ee34SDavid Howells goto out_bad_parent; 1037c435ee34SDavid Howells inode = d_inode(dentry); 1038c435ee34SDavid Howells if (is_bad_inode(inode)) { 1039a455589fSAl Viro printk("kAFS: afs_d_revalidate: %pd2 has bad inode\n", 1040a455589fSAl Viro dentry); 1041c435ee34SDavid Howells goto out_bad_parent; 10421da177e4SLinus Torvalds } 10431da177e4SLinus Torvalds 1044c435ee34SDavid Howells vnode = AFS_FS_I(inode); 1045c435ee34SDavid Howells 10461da177e4SLinus Torvalds /* if the vnode ID has changed, then the dirent points to a 10471da177e4SLinus Torvalds * different file */ 104808e0e7c8SDavid Howells if (fid.vnode != vnode->fid.vnode) { 10493b6492dfSDavid Howells _debug("%pd: dirent changed [%llu != %llu]", 1050a455589fSAl Viro dentry, fid.vnode, 105108e0e7c8SDavid Howells vnode->fid.vnode); 10521da177e4SLinus Torvalds goto not_found; 10531da177e4SLinus Torvalds } 10541da177e4SLinus Torvalds 10551da177e4SLinus Torvalds /* if the vnode ID uniqifier has changed, then the file has 1056260a9803SDavid Howells * been deleted and replaced, and the original vnode ID has 1057260a9803SDavid Howells * been reused */ 105808e0e7c8SDavid Howells if (fid.unique != vnode->fid.unique) { 1059a455589fSAl Viro _debug("%pd: file deleted (uq %u -> %u I:%u)", 1060a455589fSAl Viro dentry, fid.unique, 10617a224228SJean Noel Cordenner vnode->fid.unique, 1062c435ee34SDavid Howells vnode->vfs_inode.i_generation); 1063c435ee34SDavid Howells write_seqlock(&vnode->cb_lock); 106408e0e7c8SDavid Howells set_bit(AFS_VNODE_DELETED, &vnode->flags); 1065c435ee34SDavid Howells write_sequnlock(&vnode->cb_lock); 1066260a9803SDavid Howells goto not_found; 1067260a9803SDavid Howells } 1068260a9803SDavid Howells goto out_valid; 1069260a9803SDavid Howells 1070260a9803SDavid Howells case -ENOENT: 1071260a9803SDavid Howells /* the filename is unknown */ 1072a455589fSAl Viro _debug("%pd: dirent not found", dentry); 10732b0143b5SDavid Howells if (d_really_is_positive(dentry)) 1074260a9803SDavid Howells goto not_found; 1075260a9803SDavid Howells goto out_valid; 1076260a9803SDavid Howells 1077260a9803SDavid Howells default: 1078a455589fSAl Viro _debug("failed to iterate dir %pd: %d", 1079a455589fSAl Viro parent, ret); 1080c435ee34SDavid Howells goto out_bad_parent; 10811da177e4SLinus Torvalds } 108208e0e7c8SDavid Howells 10831da177e4SLinus Torvalds out_valid: 1084a4ff7401SDavid Howells dentry->d_fsdata = (void *)dir_version; 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); 1366a38a7558SDavid Howells __afs_break_callback(vnode); 1367440fbc3aSDavid Howells } 1368a38a7558SDavid Howells write_sequnlock(&vnode->cb_lock); 1369440fbc3aSDavid Howells ret = 0; 1370440fbc3aSDavid Howells } else { 1371a38a7558SDavid Howells afs_break_callback(vnode); 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; 139330062bd1SDavid Howells struct afs_vnode *dvnode = AFS_FS_I(dir), *vnode = NULL; 1394d2ddc776SDavid Howells struct key *key; 139579ddbfa5SDavid Howells bool need_rehash = false; 1396d2ddc776SDavid Howells int ret; 1397d2ddc776SDavid Howells 13983b6492dfSDavid Howells _enter("{%llx:%llu},{%pd}", 1399d2ddc776SDavid Howells dvnode->fid.vid, dvnode->fid.vnode, dentry); 1400d2ddc776SDavid Howells 1401d2ddc776SDavid Howells if (dentry->d_name.len >= AFSNAMEMAX) 1402d2ddc776SDavid Howells return -ENAMETOOLONG; 1403d2ddc776SDavid Howells 1404a58823acSDavid Howells ret = -ENOMEM; 1405a58823acSDavid Howells scb = kcalloc(2, sizeof(struct afs_status_cb), GFP_KERNEL); 1406a58823acSDavid Howells if (!scb) 1407a58823acSDavid Howells goto error; 1408a58823acSDavid Howells 1409d2ddc776SDavid Howells key = afs_request_key(dvnode->volume->cell); 1410d2ddc776SDavid Howells if (IS_ERR(key)) { 1411d2ddc776SDavid Howells ret = PTR_ERR(key); 1412a58823acSDavid Howells goto error_scb; 1413d2ddc776SDavid Howells } 1414d2ddc776SDavid Howells 1415d2ddc776SDavid Howells /* Try to make sure we have a callback promise on the victim. */ 1416d2ddc776SDavid Howells if (d_really_is_positive(dentry)) { 1417d2ddc776SDavid Howells vnode = AFS_FS_I(d_inode(dentry)); 1418d2ddc776SDavid Howells ret = afs_validate(vnode, key); 1419d2ddc776SDavid Howells if (ret < 0) 1420d2ddc776SDavid Howells goto error_key; 1421d2ddc776SDavid Howells } 1422d2ddc776SDavid Howells 142379ddbfa5SDavid Howells spin_lock(&dentry->d_lock); 142479ddbfa5SDavid Howells if (vnode && d_count(dentry) > 1) { 142579ddbfa5SDavid Howells spin_unlock(&dentry->d_lock); 142679ddbfa5SDavid Howells /* Start asynchronous writeout of the inode */ 142779ddbfa5SDavid Howells write_inode_now(d_inode(dentry), 0); 142879ddbfa5SDavid Howells ret = afs_sillyrename(dvnode, vnode, dentry, key); 142979ddbfa5SDavid Howells goto error_key; 143079ddbfa5SDavid Howells } 143179ddbfa5SDavid Howells if (!d_unhashed(dentry)) { 143279ddbfa5SDavid Howells /* Prevent a race with RCU lookup. */ 143379ddbfa5SDavid Howells __d_drop(dentry); 143479ddbfa5SDavid Howells need_rehash = true; 143579ddbfa5SDavid Howells } 143679ddbfa5SDavid Howells spin_unlock(&dentry->d_lock); 143779ddbfa5SDavid Howells 1438d2ddc776SDavid Howells ret = -ERESTARTSYS; 143920b8391fSDavid Howells if (afs_begin_vnode_operation(&fc, dvnode, key, true)) { 1440a58823acSDavid Howells afs_dataversion_t data_version = dvnode->status.data_version + 1; 1441a38a7558SDavid Howells afs_dataversion_t data_version_2 = vnode->status.data_version; 1442a58823acSDavid Howells 1443d2ddc776SDavid Howells while (afs_select_fileserver(&fc)) { 144468251f0aSDavid Howells fc.cb_break = afs_calc_vnode_cb_break(dvnode); 1445a38a7558SDavid Howells fc.cb_break_2 = afs_calc_vnode_cb_break(vnode); 144630062bd1SDavid Howells 144730062bd1SDavid Howells if (test_bit(AFS_SERVER_FL_IS_YFS, &fc.cbi->server->flags) && 144830062bd1SDavid Howells !test_bit(AFS_SERVER_FL_NO_RM2, &fc.cbi->server->flags)) { 144930062bd1SDavid Howells yfs_fs_remove_file2(&fc, vnode, dentry->d_name.name, 1450a58823acSDavid Howells &scb[0], &scb[1]); 145130062bd1SDavid Howells if (fc.ac.error != -ECONNABORTED || 145230062bd1SDavid Howells fc.ac.abort_code != RXGEN_OPCODE) 145330062bd1SDavid Howells continue; 145430062bd1SDavid Howells set_bit(AFS_SERVER_FL_NO_RM2, &fc.cbi->server->flags); 145530062bd1SDavid Howells } 145630062bd1SDavid Howells 1457a58823acSDavid Howells afs_fs_remove(&fc, vnode, dentry->d_name.name, false, &scb[0]); 1458d2ddc776SDavid Howells } 1459d2ddc776SDavid Howells 1460a58823acSDavid Howells afs_vnode_commit_status(&fc, dvnode, fc.cb_break, 1461a58823acSDavid Howells &data_version, &scb[0]); 1462a38a7558SDavid Howells afs_vnode_commit_status(&fc, vnode, fc.cb_break_2, 1463a38a7558SDavid Howells &data_version_2, &scb[1]); 1464d2ddc776SDavid Howells ret = afs_end_vnode_operation(&fc); 1465a38a7558SDavid Howells if (ret == 0 && !(scb[1].have_status || scb[1].have_error)) 1466a38a7558SDavid Howells ret = afs_dir_remove_link(dvnode, dentry, key); 146763a4681fSDavid Howells if (ret == 0 && 146863a4681fSDavid Howells test_bit(AFS_VNODE_DIR_VALID, &dvnode->flags)) 146963a4681fSDavid Howells afs_edit_dir_remove(dvnode, &dentry->d_name, 147063a4681fSDavid Howells afs_edit_dir_for_unlink); 1471d2ddc776SDavid Howells } 1472d2ddc776SDavid Howells 147379ddbfa5SDavid Howells if (need_rehash && ret < 0 && ret != -ENOENT) 147479ddbfa5SDavid Howells d_rehash(dentry); 147579ddbfa5SDavid Howells 1476d2ddc776SDavid Howells error_key: 1477260a9803SDavid Howells key_put(key); 1478a58823acSDavid Howells error_scb: 1479a58823acSDavid Howells kfree(scb); 1480260a9803SDavid Howells error: 1481260a9803SDavid Howells _leave(" = %d", ret); 1482260a9803SDavid Howells return ret; 1483260a9803SDavid Howells } 1484260a9803SDavid Howells 1485260a9803SDavid Howells /* 1486260a9803SDavid Howells * create a regular file on an AFS filesystem 1487260a9803SDavid Howells */ 14884acdaf27SAl Viro static int afs_create(struct inode *dir, struct dentry *dentry, umode_t mode, 1489ebfc3b49SAl Viro bool excl) 1490260a9803SDavid Howells { 1491b8359153SDavid Howells struct afs_iget_data iget_data; 1492d2ddc776SDavid Howells struct afs_fs_cursor fc; 1493a58823acSDavid Howells struct afs_status_cb *scb; 149443dd388bSColin Ian King struct afs_vnode *dvnode = AFS_FS_I(dir); 1495260a9803SDavid Howells struct key *key; 1496260a9803SDavid Howells int ret; 1497260a9803SDavid Howells 1498d2ddc776SDavid Howells mode |= S_IFREG; 1499260a9803SDavid Howells 15003b6492dfSDavid Howells _enter("{%llx:%llu},{%pd},%ho,", 1501a455589fSAl Viro dvnode->fid.vid, dvnode->fid.vnode, dentry, mode); 1502260a9803SDavid Howells 1503d2ddc776SDavid Howells ret = -ENAMETOOLONG; 1504d2ddc776SDavid Howells if (dentry->d_name.len >= AFSNAMEMAX) 1505d2ddc776SDavid Howells goto error; 1506d2ddc776SDavid Howells 1507260a9803SDavid Howells key = afs_request_key(dvnode->volume->cell); 1508260a9803SDavid Howells if (IS_ERR(key)) { 1509260a9803SDavid Howells ret = PTR_ERR(key); 1510260a9803SDavid Howells goto error; 1511260a9803SDavid Howells } 1512260a9803SDavid Howells 1513a58823acSDavid Howells ret = -ENOMEM; 1514a58823acSDavid Howells scb = kcalloc(2, sizeof(struct afs_status_cb), GFP_KERNEL); 1515a58823acSDavid Howells if (!scb) 1516a58823acSDavid Howells goto error_scb; 1517a58823acSDavid Howells 1518d2ddc776SDavid Howells ret = -ERESTARTSYS; 151920b8391fSDavid Howells if (afs_begin_vnode_operation(&fc, dvnode, key, true)) { 1520a58823acSDavid Howells afs_dataversion_t data_version = dvnode->status.data_version + 1; 1521a58823acSDavid Howells 1522d2ddc776SDavid Howells while (afs_select_fileserver(&fc)) { 152368251f0aSDavid Howells fc.cb_break = afs_calc_vnode_cb_break(dvnode); 1524b8359153SDavid Howells afs_prep_for_new_inode(&fc, &iget_data); 1525a58823acSDavid Howells afs_fs_create(&fc, dentry->d_name.name, mode, 1526b8359153SDavid Howells &scb[0], &iget_data.fid, &scb[1]); 1527d2ddc776SDavid Howells } 1528d2ddc776SDavid Howells 1529a58823acSDavid Howells afs_check_for_remote_deletion(&fc, dvnode); 1530a58823acSDavid Howells afs_vnode_commit_status(&fc, dvnode, fc.cb_break, 1531a58823acSDavid Howells &data_version, &scb[0]); 1532b8359153SDavid Howells afs_vnode_new_inode(&fc, dentry, &iget_data, &scb[1]); 1533d2ddc776SDavid Howells ret = afs_end_vnode_operation(&fc); 1534260a9803SDavid Howells if (ret < 0) 1535d2ddc776SDavid Howells goto error_key; 15364433b691SDavid Howells } else { 15374433b691SDavid Howells goto error_key; 1538260a9803SDavid Howells } 1539260a9803SDavid Howells 154063a4681fSDavid Howells if (test_bit(AFS_VNODE_DIR_VALID, &dvnode->flags)) 1541b8359153SDavid Howells afs_edit_dir_add(dvnode, &dentry->d_name, &iget_data.fid, 154263a4681fSDavid Howells afs_edit_dir_for_create); 154363a4681fSDavid Howells 1544a58823acSDavid Howells kfree(scb); 1545260a9803SDavid Howells key_put(key); 1546260a9803SDavid Howells _leave(" = 0"); 1547260a9803SDavid Howells return 0; 1548260a9803SDavid Howells 1549a58823acSDavid Howells error_scb: 1550a58823acSDavid Howells kfree(scb); 1551d2ddc776SDavid Howells error_key: 1552260a9803SDavid Howells key_put(key); 1553260a9803SDavid Howells error: 1554260a9803SDavid Howells d_drop(dentry); 1555260a9803SDavid Howells _leave(" = %d", ret); 1556260a9803SDavid Howells return ret; 1557260a9803SDavid Howells } 1558260a9803SDavid Howells 1559260a9803SDavid Howells /* 1560260a9803SDavid Howells * create a hard link between files in an AFS filesystem 1561260a9803SDavid Howells */ 1562260a9803SDavid Howells static int afs_link(struct dentry *from, struct inode *dir, 1563260a9803SDavid Howells struct dentry *dentry) 1564260a9803SDavid Howells { 1565d2ddc776SDavid Howells struct afs_fs_cursor fc; 1566a58823acSDavid Howells struct afs_status_cb *scb; 1567a58823acSDavid Howells struct afs_vnode *dvnode = AFS_FS_I(dir); 1568a58823acSDavid Howells struct afs_vnode *vnode = AFS_FS_I(d_inode(from)); 1569260a9803SDavid Howells struct key *key; 1570260a9803SDavid Howells int ret; 1571260a9803SDavid Howells 15723b6492dfSDavid Howells _enter("{%llx:%llu},{%llx:%llu},{%pd}", 1573260a9803SDavid Howells vnode->fid.vid, vnode->fid.vnode, 1574260a9803SDavid Howells dvnode->fid.vid, dvnode->fid.vnode, 1575a455589fSAl Viro dentry); 1576260a9803SDavid Howells 1577d2ddc776SDavid Howells ret = -ENAMETOOLONG; 1578d2ddc776SDavid Howells if (dentry->d_name.len >= AFSNAMEMAX) 1579d2ddc776SDavid Howells goto error; 1580d2ddc776SDavid Howells 1581a58823acSDavid Howells ret = -ENOMEM; 1582a58823acSDavid Howells scb = kcalloc(2, sizeof(struct afs_status_cb), GFP_KERNEL); 1583a58823acSDavid Howells if (!scb) 1584a58823acSDavid Howells goto error; 1585a58823acSDavid Howells 1586260a9803SDavid Howells key = afs_request_key(dvnode->volume->cell); 1587260a9803SDavid Howells if (IS_ERR(key)) { 1588260a9803SDavid Howells ret = PTR_ERR(key); 1589a58823acSDavid Howells goto error_scb; 1590260a9803SDavid Howells } 1591260a9803SDavid Howells 1592d2ddc776SDavid Howells ret = -ERESTARTSYS; 159320b8391fSDavid Howells if (afs_begin_vnode_operation(&fc, dvnode, key, true)) { 1594a58823acSDavid Howells afs_dataversion_t data_version = dvnode->status.data_version + 1; 1595a58823acSDavid Howells 1596d2ddc776SDavid Howells if (mutex_lock_interruptible_nested(&vnode->io_lock, 1) < 0) { 1597d2ddc776SDavid Howells afs_end_vnode_operation(&fc); 1598bc1527dcSDavid Howells goto error_key; 1599d2ddc776SDavid Howells } 1600260a9803SDavid Howells 1601d2ddc776SDavid Howells while (afs_select_fileserver(&fc)) { 160268251f0aSDavid Howells fc.cb_break = afs_calc_vnode_cb_break(dvnode); 160368251f0aSDavid Howells fc.cb_break_2 = afs_calc_vnode_cb_break(vnode); 1604a58823acSDavid Howells afs_fs_link(&fc, vnode, dentry->d_name.name, 1605a58823acSDavid Howells &scb[0], &scb[1]); 1606d2ddc776SDavid Howells } 1607d2ddc776SDavid Howells 1608a58823acSDavid Howells afs_vnode_commit_status(&fc, dvnode, fc.cb_break, 1609a58823acSDavid Howells &data_version, &scb[0]); 1610a58823acSDavid Howells afs_vnode_commit_status(&fc, vnode, fc.cb_break_2, 1611a58823acSDavid Howells NULL, &scb[1]); 16127de9c6eeSAl Viro ihold(&vnode->vfs_inode); 1613260a9803SDavid Howells d_instantiate(dentry, &vnode->vfs_inode); 1614d2ddc776SDavid Howells 1615d2ddc776SDavid Howells mutex_unlock(&vnode->io_lock); 1616d2ddc776SDavid Howells ret = afs_end_vnode_operation(&fc); 1617d2ddc776SDavid Howells if (ret < 0) 1618d2ddc776SDavid Howells goto error_key; 16194433b691SDavid Howells } else { 16204433b691SDavid Howells goto error_key; 1621d2ddc776SDavid Howells } 1622d2ddc776SDavid Howells 162363a4681fSDavid Howells if (test_bit(AFS_VNODE_DIR_VALID, &dvnode->flags)) 162463a4681fSDavid Howells afs_edit_dir_add(dvnode, &dentry->d_name, &vnode->fid, 162563a4681fSDavid Howells afs_edit_dir_for_link); 162663a4681fSDavid Howells 1627260a9803SDavid Howells key_put(key); 1628a58823acSDavid Howells kfree(scb); 1629260a9803SDavid Howells _leave(" = 0"); 1630260a9803SDavid Howells return 0; 1631260a9803SDavid Howells 1632d2ddc776SDavid Howells error_key: 1633260a9803SDavid Howells key_put(key); 1634a58823acSDavid Howells error_scb: 1635a58823acSDavid Howells kfree(scb); 1636260a9803SDavid Howells error: 1637260a9803SDavid Howells d_drop(dentry); 1638260a9803SDavid Howells _leave(" = %d", ret); 1639260a9803SDavid Howells return ret; 1640260a9803SDavid Howells } 1641260a9803SDavid Howells 1642260a9803SDavid Howells /* 1643260a9803SDavid Howells * create a symlink in an AFS filesystem 1644260a9803SDavid Howells */ 1645260a9803SDavid Howells static int afs_symlink(struct inode *dir, struct dentry *dentry, 1646260a9803SDavid Howells const char *content) 1647260a9803SDavid Howells { 1648b8359153SDavid Howells struct afs_iget_data iget_data; 1649d2ddc776SDavid Howells struct afs_fs_cursor fc; 1650a58823acSDavid Howells struct afs_status_cb *scb; 1651d2ddc776SDavid Howells struct afs_vnode *dvnode = AFS_FS_I(dir); 1652260a9803SDavid Howells struct key *key; 1653260a9803SDavid Howells int ret; 1654260a9803SDavid Howells 16553b6492dfSDavid Howells _enter("{%llx:%llu},{%pd},%s", 1656a455589fSAl Viro dvnode->fid.vid, dvnode->fid.vnode, dentry, 1657260a9803SDavid Howells content); 1658260a9803SDavid Howells 1659d2ddc776SDavid Howells ret = -ENAMETOOLONG; 1660d2ddc776SDavid Howells if (dentry->d_name.len >= AFSNAMEMAX) 1661d2ddc776SDavid Howells goto error; 1662d2ddc776SDavid Howells 1663260a9803SDavid Howells ret = -EINVAL; 166445222b9eSDavid Howells if (strlen(content) >= AFSPATHMAX) 1665260a9803SDavid Howells goto error; 1666260a9803SDavid Howells 1667a58823acSDavid Howells ret = -ENOMEM; 1668a58823acSDavid Howells scb = kcalloc(2, sizeof(struct afs_status_cb), GFP_KERNEL); 1669a58823acSDavid Howells if (!scb) 1670a58823acSDavid Howells goto error; 1671a58823acSDavid Howells 1672260a9803SDavid Howells key = afs_request_key(dvnode->volume->cell); 1673260a9803SDavid Howells if (IS_ERR(key)) { 1674260a9803SDavid Howells ret = PTR_ERR(key); 1675a58823acSDavid Howells goto error_scb; 1676260a9803SDavid Howells } 1677260a9803SDavid Howells 1678d2ddc776SDavid Howells ret = -ERESTARTSYS; 167920b8391fSDavid Howells if (afs_begin_vnode_operation(&fc, dvnode, key, true)) { 1680a58823acSDavid Howells afs_dataversion_t data_version = dvnode->status.data_version + 1; 1681a58823acSDavid Howells 1682d2ddc776SDavid Howells while (afs_select_fileserver(&fc)) { 168368251f0aSDavid Howells fc.cb_break = afs_calc_vnode_cb_break(dvnode); 1684b8359153SDavid Howells afs_prep_for_new_inode(&fc, &iget_data); 1685a58823acSDavid Howells afs_fs_symlink(&fc, dentry->d_name.name, content, 1686b8359153SDavid Howells &scb[0], &iget_data.fid, &scb[1]); 1687d2ddc776SDavid Howells } 1688d2ddc776SDavid Howells 1689a58823acSDavid Howells afs_check_for_remote_deletion(&fc, dvnode); 1690a58823acSDavid Howells afs_vnode_commit_status(&fc, dvnode, fc.cb_break, 1691a58823acSDavid Howells &data_version, &scb[0]); 1692b8359153SDavid Howells afs_vnode_new_inode(&fc, dentry, &iget_data, &scb[1]); 1693d2ddc776SDavid Howells ret = afs_end_vnode_operation(&fc); 1694260a9803SDavid Howells if (ret < 0) 1695d2ddc776SDavid Howells goto error_key; 16964433b691SDavid Howells } else { 16974433b691SDavid Howells goto error_key; 1698260a9803SDavid Howells } 1699260a9803SDavid Howells 170063a4681fSDavid Howells if (test_bit(AFS_VNODE_DIR_VALID, &dvnode->flags)) 1701b8359153SDavid Howells afs_edit_dir_add(dvnode, &dentry->d_name, &iget_data.fid, 170263a4681fSDavid Howells afs_edit_dir_for_symlink); 170363a4681fSDavid Howells 1704260a9803SDavid Howells key_put(key); 1705a58823acSDavid Howells kfree(scb); 1706260a9803SDavid Howells _leave(" = 0"); 1707260a9803SDavid Howells return 0; 1708260a9803SDavid Howells 1709d2ddc776SDavid Howells error_key: 1710260a9803SDavid Howells key_put(key); 1711a58823acSDavid Howells error_scb: 1712a58823acSDavid Howells kfree(scb); 1713260a9803SDavid Howells error: 1714260a9803SDavid Howells d_drop(dentry); 1715260a9803SDavid Howells _leave(" = %d", ret); 1716260a9803SDavid Howells return ret; 1717260a9803SDavid Howells } 1718260a9803SDavid Howells 1719260a9803SDavid Howells /* 1720260a9803SDavid Howells * rename a file in an AFS filesystem and/or move it between directories 1721260a9803SDavid Howells */ 1722260a9803SDavid Howells static int afs_rename(struct inode *old_dir, struct dentry *old_dentry, 17231cd66c93SMiklos Szeredi struct inode *new_dir, struct dentry *new_dentry, 17241cd66c93SMiklos Szeredi unsigned int flags) 1725260a9803SDavid Howells { 1726d2ddc776SDavid Howells struct afs_fs_cursor fc; 1727a58823acSDavid Howells struct afs_status_cb *scb; 1728260a9803SDavid Howells struct afs_vnode *orig_dvnode, *new_dvnode, *vnode; 172979ddbfa5SDavid Howells struct dentry *tmp = NULL, *rehash = NULL; 173079ddbfa5SDavid Howells struct inode *new_inode; 1731260a9803SDavid Howells struct key *key; 173263a4681fSDavid Howells bool new_negative = d_is_negative(new_dentry); 1733260a9803SDavid Howells int ret; 1734260a9803SDavid Howells 17351cd66c93SMiklos Szeredi if (flags) 17361cd66c93SMiklos Szeredi return -EINVAL; 17371cd66c93SMiklos Szeredi 173879ddbfa5SDavid Howells /* Don't allow silly-rename files be moved around. */ 173979ddbfa5SDavid Howells if (old_dentry->d_flags & DCACHE_NFSFS_RENAMED) 174079ddbfa5SDavid Howells return -EINVAL; 174179ddbfa5SDavid Howells 17422b0143b5SDavid Howells vnode = AFS_FS_I(d_inode(old_dentry)); 1743260a9803SDavid Howells orig_dvnode = AFS_FS_I(old_dir); 1744260a9803SDavid Howells new_dvnode = AFS_FS_I(new_dir); 1745260a9803SDavid Howells 17463b6492dfSDavid Howells _enter("{%llx:%llu},{%llx:%llu},{%llx:%llu},{%pd}", 1747260a9803SDavid Howells orig_dvnode->fid.vid, orig_dvnode->fid.vnode, 1748260a9803SDavid Howells vnode->fid.vid, vnode->fid.vnode, 1749260a9803SDavid Howells new_dvnode->fid.vid, new_dvnode->fid.vnode, 1750a455589fSAl Viro new_dentry); 1751260a9803SDavid Howells 1752a58823acSDavid Howells ret = -ENOMEM; 1753a58823acSDavid Howells scb = kcalloc(2, sizeof(struct afs_status_cb), GFP_KERNEL); 1754a58823acSDavid Howells if (!scb) 1755a58823acSDavid Howells goto error; 1756a58823acSDavid Howells 1757260a9803SDavid Howells key = afs_request_key(orig_dvnode->volume->cell); 1758260a9803SDavid Howells if (IS_ERR(key)) { 1759260a9803SDavid Howells ret = PTR_ERR(key); 1760a58823acSDavid Howells goto error_scb; 1761260a9803SDavid Howells } 1762260a9803SDavid Howells 176379ddbfa5SDavid Howells /* For non-directories, check whether the target is busy and if so, 176479ddbfa5SDavid Howells * make a copy of the dentry and then do a silly-rename. If the 176579ddbfa5SDavid Howells * silly-rename succeeds, the copied dentry is hashed and becomes the 176679ddbfa5SDavid Howells * new target. 176779ddbfa5SDavid Howells */ 176879ddbfa5SDavid Howells if (d_is_positive(new_dentry) && !d_is_dir(new_dentry)) { 176979ddbfa5SDavid Howells /* To prevent any new references to the target during the 177079ddbfa5SDavid Howells * rename, we unhash the dentry in advance. 177179ddbfa5SDavid Howells */ 177279ddbfa5SDavid Howells if (!d_unhashed(new_dentry)) { 177379ddbfa5SDavid Howells d_drop(new_dentry); 177479ddbfa5SDavid Howells rehash = new_dentry; 177579ddbfa5SDavid Howells } 177679ddbfa5SDavid Howells 177779ddbfa5SDavid Howells if (d_count(new_dentry) > 2) { 177879ddbfa5SDavid Howells /* copy the target dentry's name */ 177979ddbfa5SDavid Howells ret = -ENOMEM; 178079ddbfa5SDavid Howells tmp = d_alloc(new_dentry->d_parent, 178179ddbfa5SDavid Howells &new_dentry->d_name); 178279ddbfa5SDavid Howells if (!tmp) 178379ddbfa5SDavid Howells goto error_rehash; 178479ddbfa5SDavid Howells 178579ddbfa5SDavid Howells ret = afs_sillyrename(new_dvnode, 178679ddbfa5SDavid Howells AFS_FS_I(d_inode(new_dentry)), 178779ddbfa5SDavid Howells new_dentry, key); 178879ddbfa5SDavid Howells if (ret) 178979ddbfa5SDavid Howells goto error_rehash; 179079ddbfa5SDavid Howells 179179ddbfa5SDavid Howells new_dentry = tmp; 179279ddbfa5SDavid Howells rehash = NULL; 179379ddbfa5SDavid Howells new_negative = true; 179479ddbfa5SDavid Howells } 179579ddbfa5SDavid Howells } 179679ddbfa5SDavid Howells 1797d2ddc776SDavid Howells ret = -ERESTARTSYS; 179820b8391fSDavid Howells if (afs_begin_vnode_operation(&fc, orig_dvnode, key, true)) { 1799a58823acSDavid Howells afs_dataversion_t orig_data_version; 1800a58823acSDavid Howells afs_dataversion_t new_data_version; 1801a58823acSDavid Howells struct afs_status_cb *new_scb = &scb[1]; 1802a58823acSDavid Howells 1803a58823acSDavid Howells orig_data_version = orig_dvnode->status.data_version + 1; 1804a58823acSDavid Howells 1805d2ddc776SDavid Howells if (orig_dvnode != new_dvnode) { 1806d2ddc776SDavid Howells if (mutex_lock_interruptible_nested(&new_dvnode->io_lock, 1) < 0) { 1807d2ddc776SDavid Howells afs_end_vnode_operation(&fc); 180879ddbfa5SDavid Howells goto error_rehash; 1809d2ddc776SDavid Howells } 1810a58823acSDavid Howells new_data_version = new_dvnode->status.data_version; 1811a58823acSDavid Howells } else { 1812a58823acSDavid Howells new_data_version = orig_data_version; 1813a58823acSDavid Howells new_scb = &scb[0]; 1814d2ddc776SDavid Howells } 1815a58823acSDavid Howells 1816d2ddc776SDavid Howells while (afs_select_fileserver(&fc)) { 181768251f0aSDavid Howells fc.cb_break = afs_calc_vnode_cb_break(orig_dvnode); 181868251f0aSDavid Howells fc.cb_break_2 = afs_calc_vnode_cb_break(new_dvnode); 1819d2ddc776SDavid Howells afs_fs_rename(&fc, old_dentry->d_name.name, 182063a4681fSDavid Howells new_dvnode, new_dentry->d_name.name, 1821a58823acSDavid Howells &scb[0], new_scb); 1822d2ddc776SDavid Howells } 1823d2ddc776SDavid Howells 1824a58823acSDavid Howells afs_vnode_commit_status(&fc, orig_dvnode, fc.cb_break, 1825a58823acSDavid Howells &orig_data_version, &scb[0]); 1826a58823acSDavid Howells if (new_dvnode != orig_dvnode) { 1827a58823acSDavid Howells afs_vnode_commit_status(&fc, new_dvnode, fc.cb_break_2, 1828a58823acSDavid Howells &new_data_version, &scb[1]); 1829d2ddc776SDavid Howells mutex_unlock(&new_dvnode->io_lock); 1830a58823acSDavid Howells } 1831d2ddc776SDavid Howells ret = afs_end_vnode_operation(&fc); 1832260a9803SDavid Howells if (ret < 0) 183379ddbfa5SDavid Howells goto error_rehash; 1834d2ddc776SDavid Howells } 1835d2ddc776SDavid Howells 183663a4681fSDavid Howells if (ret == 0) { 183779ddbfa5SDavid Howells if (rehash) 183879ddbfa5SDavid Howells d_rehash(rehash); 183963a4681fSDavid Howells if (test_bit(AFS_VNODE_DIR_VALID, &orig_dvnode->flags)) 184063a4681fSDavid Howells afs_edit_dir_remove(orig_dvnode, &old_dentry->d_name, 184179ddbfa5SDavid Howells afs_edit_dir_for_rename_0); 184263a4681fSDavid Howells 184363a4681fSDavid Howells if (!new_negative && 184463a4681fSDavid Howells test_bit(AFS_VNODE_DIR_VALID, &new_dvnode->flags)) 184563a4681fSDavid Howells afs_edit_dir_remove(new_dvnode, &new_dentry->d_name, 184679ddbfa5SDavid Howells afs_edit_dir_for_rename_1); 184763a4681fSDavid Howells 184863a4681fSDavid Howells if (test_bit(AFS_VNODE_DIR_VALID, &new_dvnode->flags)) 184963a4681fSDavid Howells afs_edit_dir_add(new_dvnode, &new_dentry->d_name, 185079ddbfa5SDavid Howells &vnode->fid, afs_edit_dir_for_rename_2); 185179ddbfa5SDavid Howells 185279ddbfa5SDavid Howells new_inode = d_inode(new_dentry); 185379ddbfa5SDavid Howells if (new_inode) { 185479ddbfa5SDavid Howells spin_lock(&new_inode->i_lock); 185579ddbfa5SDavid Howells if (new_inode->i_nlink > 0) 185679ddbfa5SDavid Howells drop_nlink(new_inode); 185779ddbfa5SDavid Howells spin_unlock(&new_inode->i_lock); 185879ddbfa5SDavid Howells } 185979ddbfa5SDavid Howells d_move(old_dentry, new_dentry); 186079ddbfa5SDavid Howells goto error_tmp; 186163a4681fSDavid Howells } 186263a4681fSDavid Howells 186379ddbfa5SDavid Howells error_rehash: 186479ddbfa5SDavid Howells if (rehash) 186579ddbfa5SDavid Howells d_rehash(rehash); 186679ddbfa5SDavid Howells error_tmp: 186779ddbfa5SDavid Howells if (tmp) 186879ddbfa5SDavid Howells dput(tmp); 1869260a9803SDavid Howells key_put(key); 1870a58823acSDavid Howells error_scb: 1871a58823acSDavid Howells kfree(scb); 1872260a9803SDavid Howells error: 1873260a9803SDavid Howells _leave(" = %d", ret); 1874260a9803SDavid Howells return ret; 1875260a9803SDavid Howells } 1876f3ddee8dSDavid Howells 1877f3ddee8dSDavid Howells /* 1878f3ddee8dSDavid Howells * Release a directory page and clean up its private state if it's not busy 1879f3ddee8dSDavid Howells * - return true if the page can now be released, false if not 1880f3ddee8dSDavid Howells */ 1881f3ddee8dSDavid Howells static int afs_dir_releasepage(struct page *page, gfp_t gfp_flags) 1882f3ddee8dSDavid Howells { 1883f3ddee8dSDavid Howells struct afs_vnode *dvnode = AFS_FS_I(page->mapping->host); 1884f3ddee8dSDavid Howells 18853b6492dfSDavid Howells _enter("{{%llx:%llu}[%lu]}", dvnode->fid.vid, dvnode->fid.vnode, page->index); 1886f3ddee8dSDavid Howells 1887f3ddee8dSDavid Howells set_page_private(page, 0); 1888f3ddee8dSDavid Howells ClearPagePrivate(page); 1889f3ddee8dSDavid Howells 1890f3ddee8dSDavid Howells /* The directory will need reloading. */ 1891f3ddee8dSDavid Howells if (test_and_clear_bit(AFS_VNODE_DIR_VALID, &dvnode->flags)) 1892f3ddee8dSDavid Howells afs_stat_v(dvnode, n_relpg); 1893f3ddee8dSDavid Howells return 1; 1894f3ddee8dSDavid Howells } 1895f3ddee8dSDavid Howells 1896f3ddee8dSDavid Howells /* 1897f3ddee8dSDavid Howells * invalidate part or all of a page 1898f3ddee8dSDavid Howells * - release a page and clean up its private data if offset is 0 (indicating 1899f3ddee8dSDavid Howells * the entire page) 1900f3ddee8dSDavid Howells */ 1901f3ddee8dSDavid Howells static void afs_dir_invalidatepage(struct page *page, unsigned int offset, 1902f3ddee8dSDavid Howells unsigned int length) 1903f3ddee8dSDavid Howells { 1904f3ddee8dSDavid Howells struct afs_vnode *dvnode = AFS_FS_I(page->mapping->host); 1905f3ddee8dSDavid Howells 1906f3ddee8dSDavid Howells _enter("{%lu},%u,%u", page->index, offset, length); 1907f3ddee8dSDavid Howells 1908f3ddee8dSDavid Howells BUG_ON(!PageLocked(page)); 1909f3ddee8dSDavid Howells 1910f3ddee8dSDavid Howells /* The directory will need reloading. */ 1911f3ddee8dSDavid Howells if (test_and_clear_bit(AFS_VNODE_DIR_VALID, &dvnode->flags)) 1912f3ddee8dSDavid Howells afs_stat_v(dvnode, n_inval); 1913f3ddee8dSDavid Howells 1914f3ddee8dSDavid Howells /* we clean up only if the entire page is being invalidated */ 1915f3ddee8dSDavid Howells if (offset == 0 && length == PAGE_SIZE) { 1916f3ddee8dSDavid Howells set_page_private(page, 0); 1917f3ddee8dSDavid Howells ClearPagePrivate(page); 1918f3ddee8dSDavid Howells } 1919f3ddee8dSDavid Howells } 1920