11da177e4SLinus Torvalds /* dir.c: AFS filesystem directory handling 21da177e4SLinus Torvalds * 3f3ddee8dSDavid Howells * Copyright (C) 2002, 2018 Red Hat, Inc. All Rights Reserved. 41da177e4SLinus Torvalds * Written by David Howells (dhowells@redhat.com) 51da177e4SLinus Torvalds * 61da177e4SLinus Torvalds * This program is free software; you can redistribute it and/or 71da177e4SLinus Torvalds * modify it under the terms of the GNU General Public License 81da177e4SLinus Torvalds * as published by the Free Software Foundation; either version 91da177e4SLinus Torvalds * 2 of the License, or (at your option) any later version. 101da177e4SLinus Torvalds */ 111da177e4SLinus Torvalds 121da177e4SLinus Torvalds #include <linux/kernel.h> 131da177e4SLinus Torvalds #include <linux/fs.h> 1434286d66SNick Piggin #include <linux/namei.h> 151da177e4SLinus Torvalds #include <linux/pagemap.h> 16f3ddee8dSDavid Howells #include <linux/swap.h> 1700d3b7a4SDavid Howells #include <linux/ctype.h> 18e8edc6e0SAlexey Dobriyan #include <linux/sched.h> 19f3ddee8dSDavid Howells #include <linux/task_io_accounting_ops.h> 201da177e4SLinus Torvalds #include "internal.h" 21a58823acSDavid Howells #include "afs_fs.h" 224ea219a8SDavid Howells #include "xdr_fs.h" 231da177e4SLinus Torvalds 24260a9803SDavid Howells static struct dentry *afs_lookup(struct inode *dir, struct dentry *dentry, 2500cd8dd3SAl Viro unsigned int flags); 261da177e4SLinus Torvalds static int afs_dir_open(struct inode *inode, struct file *file); 271bbae9f8SAl Viro static int afs_readdir(struct file *file, struct dir_context *ctx); 280b728e19SAl Viro static int afs_d_revalidate(struct dentry *dentry, unsigned int flags); 29fe15ce44SNick Piggin static int afs_d_delete(const struct dentry *dentry); 3079ddbfa5SDavid Howells static void afs_d_iput(struct dentry *dentry, struct inode *inode); 315cf9dd55SDavid Howells static int afs_lookup_one_filldir(struct dir_context *ctx, const char *name, int nlen, 325cf9dd55SDavid Howells loff_t fpos, u64 ino, unsigned dtype); 33ac7576f4SMiklos Szeredi static int afs_lookup_filldir(struct dir_context *ctx, const char *name, int nlen, 34afefdbb2SDavid Howells loff_t fpos, u64 ino, unsigned dtype); 354acdaf27SAl Viro static int afs_create(struct inode *dir, struct dentry *dentry, umode_t mode, 36ebfc3b49SAl Viro bool excl); 3718bb1db3SAl Viro static int afs_mkdir(struct inode *dir, struct dentry *dentry, umode_t mode); 38260a9803SDavid Howells static int afs_rmdir(struct inode *dir, struct dentry *dentry); 39260a9803SDavid Howells static int afs_unlink(struct inode *dir, struct dentry *dentry); 40260a9803SDavid Howells static int afs_link(struct dentry *from, struct inode *dir, 41260a9803SDavid Howells struct dentry *dentry); 42260a9803SDavid Howells static int afs_symlink(struct inode *dir, struct dentry *dentry, 43260a9803SDavid Howells const char *content); 44260a9803SDavid Howells static int afs_rename(struct inode *old_dir, struct dentry *old_dentry, 451cd66c93SMiklos Szeredi struct inode *new_dir, struct dentry *new_dentry, 461cd66c93SMiklos Szeredi unsigned int flags); 47f3ddee8dSDavid Howells static int afs_dir_releasepage(struct page *page, gfp_t gfp_flags); 48f3ddee8dSDavid Howells static void afs_dir_invalidatepage(struct page *page, unsigned int offset, 49f3ddee8dSDavid Howells unsigned int length); 50f3ddee8dSDavid Howells 51f3ddee8dSDavid Howells static int afs_dir_set_page_dirty(struct page *page) 52f3ddee8dSDavid Howells { 53f3ddee8dSDavid Howells BUG(); /* This should never happen. */ 54f3ddee8dSDavid Howells } 551da177e4SLinus Torvalds 564b6f5d20SArjan van de Ven const struct file_operations afs_dir_file_operations = { 571da177e4SLinus Torvalds .open = afs_dir_open, 5800d3b7a4SDavid Howells .release = afs_release, 5929884effSAl Viro .iterate_shared = afs_readdir, 60e8d6c554SDavid Howells .lock = afs_lock, 613222a3e5SChristoph Hellwig .llseek = generic_file_llseek, 621da177e4SLinus Torvalds }; 631da177e4SLinus Torvalds 64754661f1SArjan van de Ven const struct inode_operations afs_dir_inode_operations = { 65260a9803SDavid Howells .create = afs_create, 66260a9803SDavid Howells .lookup = afs_lookup, 67260a9803SDavid Howells .link = afs_link, 68260a9803SDavid Howells .unlink = afs_unlink, 69260a9803SDavid Howells .symlink = afs_symlink, 70260a9803SDavid Howells .mkdir = afs_mkdir, 71260a9803SDavid Howells .rmdir = afs_rmdir, 722773bf00SMiklos Szeredi .rename = afs_rename, 7300d3b7a4SDavid Howells .permission = afs_permission, 74416351f2SDavid Howells .getattr = afs_getattr, 7531143d5dSDavid Howells .setattr = afs_setattr, 76d3e3b7eaSDavid Howells .listxattr = afs_listxattr, 771da177e4SLinus Torvalds }; 781da177e4SLinus Torvalds 79f3ddee8dSDavid Howells const struct address_space_operations afs_dir_aops = { 80f3ddee8dSDavid Howells .set_page_dirty = afs_dir_set_page_dirty, 81f3ddee8dSDavid Howells .releasepage = afs_dir_releasepage, 82f3ddee8dSDavid Howells .invalidatepage = afs_dir_invalidatepage, 83f3ddee8dSDavid Howells }; 84f3ddee8dSDavid Howells 85d61dcce2SAl Viro const struct dentry_operations afs_fs_dentry_operations = { 861da177e4SLinus Torvalds .d_revalidate = afs_d_revalidate, 871da177e4SLinus Torvalds .d_delete = afs_d_delete, 88260a9803SDavid Howells .d_release = afs_d_release, 89d18610b0SDavid Howells .d_automount = afs_d_automount, 9079ddbfa5SDavid Howells .d_iput = afs_d_iput, 911da177e4SLinus Torvalds }; 921da177e4SLinus Torvalds 935cf9dd55SDavid Howells struct afs_lookup_one_cookie { 945cf9dd55SDavid Howells struct dir_context ctx; 955cf9dd55SDavid Howells struct qstr name; 965cf9dd55SDavid Howells bool found; 975cf9dd55SDavid Howells struct afs_fid fid; 985cf9dd55SDavid Howells }; 995cf9dd55SDavid Howells 100260a9803SDavid Howells struct afs_lookup_cookie { 1011bbae9f8SAl Viro struct dir_context ctx; 1021bbae9f8SAl Viro struct qstr name; 1035cf9dd55SDavid Howells bool found; 1045cf9dd55SDavid Howells bool one_only; 1055cf9dd55SDavid Howells unsigned short nr_fids; 10639db9815SDavid Howells struct inode **inodes; 10787182759SDavid Howells struct afs_status_cb *statuses; 1085cf9dd55SDavid Howells struct afs_fid fids[50]; 1091da177e4SLinus Torvalds }; 1101da177e4SLinus Torvalds 1111da177e4SLinus Torvalds /* 1121da177e4SLinus Torvalds * check that a directory page is valid 1131da177e4SLinus Torvalds */ 114f3ddee8dSDavid Howells static bool afs_dir_check_page(struct afs_vnode *dvnode, struct page *page, 115f3ddee8dSDavid Howells loff_t i_size) 1161da177e4SLinus Torvalds { 11700317636SDavid Howells struct afs_xdr_dir_page *dbuf; 118f3ddee8dSDavid Howells loff_t latter, off; 1191da177e4SLinus Torvalds int tmp, qty; 1201da177e4SLinus Torvalds 121dab17c1aSDavid Howells /* Determine how many magic numbers there should be in this page, but 122dab17c1aSDavid Howells * we must take care because the directory may change size under us. 123dab17c1aSDavid Howells */ 124dab17c1aSDavid Howells off = page_offset(page); 125dab17c1aSDavid Howells if (i_size <= off) 126dab17c1aSDavid Howells goto checked; 127dab17c1aSDavid Howells 128dab17c1aSDavid Howells latter = i_size - off; 1291da177e4SLinus Torvalds if (latter >= PAGE_SIZE) 1301da177e4SLinus Torvalds qty = PAGE_SIZE; 1311da177e4SLinus Torvalds else 1321da177e4SLinus Torvalds qty = latter; 13300317636SDavid Howells qty /= sizeof(union afs_xdr_dir_block); 1341da177e4SLinus Torvalds 1351da177e4SLinus Torvalds /* check them */ 13663a4681fSDavid Howells dbuf = kmap(page); 1371da177e4SLinus Torvalds for (tmp = 0; tmp < qty; tmp++) { 13800317636SDavid Howells if (dbuf->blocks[tmp].hdr.magic != AFS_DIR_MAGIC) { 139dab17c1aSDavid Howells printk("kAFS: %s(%lx): bad magic %d/%d is %04hx\n", 140f3ddee8dSDavid Howells __func__, dvnode->vfs_inode.i_ino, tmp, qty, 14100317636SDavid Howells ntohs(dbuf->blocks[tmp].hdr.magic)); 142f3ddee8dSDavid Howells trace_afs_dir_check_failed(dvnode, off, i_size); 14363a4681fSDavid Howells kunmap(page); 144f51375cdSDavid Howells trace_afs_file_error(dvnode, -EIO, afs_file_error_dir_bad_magic); 1451da177e4SLinus Torvalds goto error; 1461da177e4SLinus Torvalds } 14763a4681fSDavid Howells 14863a4681fSDavid Howells /* Make sure each block is NUL terminated so we can reasonably 14963a4681fSDavid Howells * use string functions on it. The filenames in the page 15063a4681fSDavid Howells * *should* be NUL-terminated anyway. 15163a4681fSDavid Howells */ 15263a4681fSDavid Howells ((u8 *)&dbuf->blocks[tmp])[AFS_DIR_BLOCK_SIZE - 1] = 0; 1531da177e4SLinus Torvalds } 1541da177e4SLinus Torvalds 15563a4681fSDavid Howells kunmap(page); 15663a4681fSDavid Howells 157dab17c1aSDavid Howells checked: 158f3ddee8dSDavid Howells afs_stat_v(dvnode, n_read_dir); 159be5b82dbSAl Viro return true; 1601da177e4SLinus Torvalds 1611da177e4SLinus Torvalds error: 162be5b82dbSAl Viro return false; 163ec26815aSDavid Howells } 1641da177e4SLinus Torvalds 1651da177e4SLinus Torvalds /* 166445b1028SDavid Howells * Check the contents of a directory that we've just read. 167445b1028SDavid Howells */ 168445b1028SDavid Howells static bool afs_dir_check_pages(struct afs_vnode *dvnode, struct afs_read *req) 169445b1028SDavid Howells { 170445b1028SDavid Howells struct afs_xdr_dir_page *dbuf; 171445b1028SDavid Howells unsigned int i, j, qty = PAGE_SIZE / sizeof(union afs_xdr_dir_block); 172445b1028SDavid Howells 173445b1028SDavid Howells for (i = 0; i < req->nr_pages; i++) 174445b1028SDavid Howells if (!afs_dir_check_page(dvnode, req->pages[i], req->actual_len)) 175445b1028SDavid Howells goto bad; 176445b1028SDavid Howells return true; 177445b1028SDavid Howells 178445b1028SDavid Howells bad: 179445b1028SDavid Howells pr_warn("DIR %llx:%llx f=%llx l=%llx al=%llx r=%llx\n", 180445b1028SDavid Howells dvnode->fid.vid, dvnode->fid.vnode, 181445b1028SDavid Howells req->file_size, req->len, req->actual_len, req->remain); 182445b1028SDavid Howells pr_warn("DIR %llx %x %x %x\n", 183445b1028SDavid Howells req->pos, req->index, req->nr_pages, req->offset); 184445b1028SDavid Howells 185445b1028SDavid Howells for (i = 0; i < req->nr_pages; i++) { 186445b1028SDavid Howells dbuf = kmap(req->pages[i]); 187445b1028SDavid Howells for (j = 0; j < qty; j++) { 188445b1028SDavid Howells union afs_xdr_dir_block *block = &dbuf->blocks[j]; 189445b1028SDavid Howells 190445b1028SDavid Howells pr_warn("[%02x] %32phN\n", i * qty + j, block); 191445b1028SDavid Howells } 192445b1028SDavid Howells kunmap(req->pages[i]); 193445b1028SDavid Howells } 194445b1028SDavid Howells return false; 195445b1028SDavid Howells } 196445b1028SDavid Howells 197445b1028SDavid Howells /* 1981da177e4SLinus Torvalds * open an AFS directory file 1991da177e4SLinus Torvalds */ 2001da177e4SLinus Torvalds static int afs_dir_open(struct inode *inode, struct file *file) 2011da177e4SLinus Torvalds { 2021da177e4SLinus Torvalds _enter("{%lu}", inode->i_ino); 2031da177e4SLinus Torvalds 20400317636SDavid Howells BUILD_BUG_ON(sizeof(union afs_xdr_dir_block) != 2048); 20500317636SDavid Howells BUILD_BUG_ON(sizeof(union afs_xdr_dirent) != 32); 2061da177e4SLinus Torvalds 20708e0e7c8SDavid Howells if (test_bit(AFS_VNODE_DELETED, &AFS_FS_I(inode)->flags)) 2081da177e4SLinus Torvalds return -ENOENT; 2091da177e4SLinus Torvalds 21000d3b7a4SDavid Howells return afs_open(inode, file); 211ec26815aSDavid Howells } 2121da177e4SLinus Torvalds 2131da177e4SLinus Torvalds /* 214f3ddee8dSDavid Howells * Read the directory into the pagecache in one go, scrubbing the previous 215f3ddee8dSDavid Howells * contents. The list of pages is returned, pinning them so that they don't 216f3ddee8dSDavid Howells * get reclaimed during the iteration. 217f3ddee8dSDavid Howells */ 218f3ddee8dSDavid Howells static struct afs_read *afs_read_dir(struct afs_vnode *dvnode, struct key *key) 219b61f7dcfSDavid Howells __acquires(&dvnode->validate_lock) 220f3ddee8dSDavid Howells { 221f3ddee8dSDavid Howells struct afs_read *req; 222f3ddee8dSDavid Howells loff_t i_size; 223f3ddee8dSDavid Howells int nr_pages, nr_inline, i, n; 224f3ddee8dSDavid Howells int ret = -ENOMEM; 225f3ddee8dSDavid Howells 226f3ddee8dSDavid Howells retry: 227f3ddee8dSDavid Howells i_size = i_size_read(&dvnode->vfs_inode); 228f3ddee8dSDavid Howells if (i_size < 2048) 229f51375cdSDavid Howells return ERR_PTR(afs_bad(dvnode, afs_file_error_dir_small)); 230f51375cdSDavid Howells if (i_size > 2048 * 1024) { 231f51375cdSDavid Howells trace_afs_file_error(dvnode, -EFBIG, afs_file_error_dir_big); 232f3ddee8dSDavid Howells return ERR_PTR(-EFBIG); 233f51375cdSDavid Howells } 234f3ddee8dSDavid Howells 235f3ddee8dSDavid Howells _enter("%llu", i_size); 236f3ddee8dSDavid Howells 237f3ddee8dSDavid Howells /* Get a request record to hold the page list. We want to hold it 238f3ddee8dSDavid Howells * inline if we can, but we don't want to make an order 1 allocation. 239f3ddee8dSDavid Howells */ 240f3ddee8dSDavid Howells nr_pages = (i_size + PAGE_SIZE - 1) / PAGE_SIZE; 241f3ddee8dSDavid Howells nr_inline = nr_pages; 242f3ddee8dSDavid Howells if (nr_inline > (PAGE_SIZE - sizeof(*req)) / sizeof(struct page *)) 243f3ddee8dSDavid Howells nr_inline = 0; 244f3ddee8dSDavid Howells 245f3ddee8dSDavid Howells req = kzalloc(sizeof(*req) + sizeof(struct page *) * nr_inline, 246f3ddee8dSDavid Howells GFP_KERNEL); 247f3ddee8dSDavid Howells if (!req) 248f3ddee8dSDavid Howells return ERR_PTR(-ENOMEM); 249f3ddee8dSDavid Howells 250f3ddee8dSDavid Howells refcount_set(&req->usage, 1); 251f3ddee8dSDavid Howells req->nr_pages = nr_pages; 252f3ddee8dSDavid Howells req->actual_len = i_size; /* May change */ 253f3ddee8dSDavid Howells req->len = nr_pages * PAGE_SIZE; /* We can ask for more than there is */ 254f3ddee8dSDavid Howells req->data_version = dvnode->status.data_version; /* May change */ 255f3ddee8dSDavid Howells if (nr_inline > 0) { 256f3ddee8dSDavid Howells req->pages = req->array; 257f3ddee8dSDavid Howells } else { 258f3ddee8dSDavid Howells req->pages = kcalloc(nr_pages, sizeof(struct page *), 259f3ddee8dSDavid Howells GFP_KERNEL); 260f3ddee8dSDavid Howells if (!req->pages) 261f3ddee8dSDavid Howells goto error; 262f3ddee8dSDavid Howells } 263f3ddee8dSDavid Howells 264f3ddee8dSDavid Howells /* Get a list of all the pages that hold or will hold the directory 265f3ddee8dSDavid Howells * content. We need to fill in any gaps that we might find where the 266f3ddee8dSDavid Howells * memory reclaimer has been at work. If there are any gaps, we will 267f3ddee8dSDavid Howells * need to reread the entire directory contents. 268f3ddee8dSDavid Howells */ 269f3ddee8dSDavid Howells i = 0; 270f3ddee8dSDavid Howells do { 271f3ddee8dSDavid Howells n = find_get_pages_contig(dvnode->vfs_inode.i_mapping, i, 272f3ddee8dSDavid Howells req->nr_pages - i, 273f3ddee8dSDavid Howells req->pages + i); 274f3ddee8dSDavid Howells _debug("find %u at %u/%u", n, i, req->nr_pages); 275f3ddee8dSDavid Howells if (n == 0) { 276f3ddee8dSDavid Howells gfp_t gfp = dvnode->vfs_inode.i_mapping->gfp_mask; 277f3ddee8dSDavid Howells 278f3ddee8dSDavid Howells if (test_and_clear_bit(AFS_VNODE_DIR_VALID, &dvnode->flags)) 279f3ddee8dSDavid Howells afs_stat_v(dvnode, n_inval); 280f3ddee8dSDavid Howells 281f3ddee8dSDavid Howells ret = -ENOMEM; 282f3ddee8dSDavid Howells req->pages[i] = __page_cache_alloc(gfp); 283f3ddee8dSDavid Howells if (!req->pages[i]) 284f3ddee8dSDavid Howells goto error; 285f3ddee8dSDavid Howells ret = add_to_page_cache_lru(req->pages[i], 286f3ddee8dSDavid Howells dvnode->vfs_inode.i_mapping, 287f3ddee8dSDavid Howells i, gfp); 288f3ddee8dSDavid Howells if (ret < 0) 289f3ddee8dSDavid Howells goto error; 290f3ddee8dSDavid Howells 291f3ddee8dSDavid Howells set_page_private(req->pages[i], 1); 292f3ddee8dSDavid Howells SetPagePrivate(req->pages[i]); 293f3ddee8dSDavid Howells unlock_page(req->pages[i]); 294f3ddee8dSDavid Howells i++; 295f3ddee8dSDavid Howells } else { 296f3ddee8dSDavid Howells i += n; 297f3ddee8dSDavid Howells } 298f3ddee8dSDavid Howells } while (i < req->nr_pages); 299f3ddee8dSDavid Howells 300f3ddee8dSDavid Howells /* If we're going to reload, we need to lock all the pages to prevent 301f3ddee8dSDavid Howells * races. 302f3ddee8dSDavid Howells */ 303f3ddee8dSDavid Howells ret = -ERESTARTSYS; 304b61f7dcfSDavid Howells if (down_read_killable(&dvnode->validate_lock) < 0) 305b61f7dcfSDavid Howells goto error; 306f3ddee8dSDavid Howells 307f3ddee8dSDavid Howells if (test_bit(AFS_VNODE_DIR_VALID, &dvnode->flags)) 308f3ddee8dSDavid Howells goto success; 309f3ddee8dSDavid Howells 310b61f7dcfSDavid Howells up_read(&dvnode->validate_lock); 311b61f7dcfSDavid Howells if (down_write_killable(&dvnode->validate_lock) < 0) 312b61f7dcfSDavid Howells goto error; 313b61f7dcfSDavid Howells 314b61f7dcfSDavid Howells if (!test_bit(AFS_VNODE_DIR_VALID, &dvnode->flags)) { 31599987c56SDavid Howells trace_afs_reload_dir(dvnode); 316f3ddee8dSDavid Howells ret = afs_fetch_data(dvnode, key, req); 317f3ddee8dSDavid Howells if (ret < 0) 318b61f7dcfSDavid Howells goto error_unlock; 319f3ddee8dSDavid Howells 320f3ddee8dSDavid Howells task_io_account_read(PAGE_SIZE * req->nr_pages); 321f3ddee8dSDavid Howells 322f3ddee8dSDavid Howells if (req->len < req->file_size) 323f3ddee8dSDavid Howells goto content_has_grown; 324f3ddee8dSDavid Howells 325f3ddee8dSDavid Howells /* Validate the data we just read. */ 326f3ddee8dSDavid Howells ret = -EIO; 327445b1028SDavid Howells if (!afs_dir_check_pages(dvnode, req)) 328b61f7dcfSDavid Howells goto error_unlock; 329f3ddee8dSDavid Howells 330f3ddee8dSDavid Howells // TODO: Trim excess pages 331f3ddee8dSDavid Howells 332f3ddee8dSDavid Howells set_bit(AFS_VNODE_DIR_VALID, &dvnode->flags); 333f3ddee8dSDavid Howells } 334f3ddee8dSDavid Howells 335b61f7dcfSDavid Howells downgrade_write(&dvnode->validate_lock); 336f3ddee8dSDavid Howells success: 337f3ddee8dSDavid Howells return req; 338f3ddee8dSDavid Howells 339f3ddee8dSDavid Howells error_unlock: 340b61f7dcfSDavid Howells up_write(&dvnode->validate_lock); 341f3ddee8dSDavid Howells error: 342f3ddee8dSDavid Howells afs_put_read(req); 343f3ddee8dSDavid Howells _leave(" = %d", ret); 344f3ddee8dSDavid Howells return ERR_PTR(ret); 345f3ddee8dSDavid Howells 346f3ddee8dSDavid Howells content_has_grown: 347b61f7dcfSDavid Howells up_write(&dvnode->validate_lock); 348f3ddee8dSDavid Howells afs_put_read(req); 349f3ddee8dSDavid Howells goto retry; 350f3ddee8dSDavid Howells } 351f3ddee8dSDavid Howells 352f3ddee8dSDavid Howells /* 3531da177e4SLinus Torvalds * deal with one block in an AFS directory 3541da177e4SLinus Torvalds */ 355f51375cdSDavid Howells static int afs_dir_iterate_block(struct afs_vnode *dvnode, 356f51375cdSDavid Howells struct dir_context *ctx, 35700317636SDavid Howells union afs_xdr_dir_block *block, 3581bbae9f8SAl Viro unsigned blkoff) 3591da177e4SLinus Torvalds { 36000317636SDavid Howells union afs_xdr_dirent *dire; 3611da177e4SLinus Torvalds unsigned offset, next, curr; 3621da177e4SLinus Torvalds size_t nlen; 3631bbae9f8SAl Viro int tmp; 3641da177e4SLinus Torvalds 3651bbae9f8SAl Viro _enter("%u,%x,%p,,",(unsigned)ctx->pos,blkoff,block); 3661da177e4SLinus Torvalds 36700317636SDavid Howells curr = (ctx->pos - blkoff) / sizeof(union afs_xdr_dirent); 3681da177e4SLinus Torvalds 3691da177e4SLinus Torvalds /* walk through the block, an entry at a time */ 3704ea219a8SDavid Howells for (offset = (blkoff == 0 ? AFS_DIR_RESV_BLOCKS0 : AFS_DIR_RESV_BLOCKS); 3714ea219a8SDavid Howells offset < AFS_DIR_SLOTS_PER_BLOCK; 3721da177e4SLinus Torvalds offset = next 3731da177e4SLinus Torvalds ) { 3741da177e4SLinus Torvalds next = offset + 1; 3751da177e4SLinus Torvalds 3761da177e4SLinus Torvalds /* skip entries marked unused in the bitmap */ 37700317636SDavid Howells if (!(block->hdr.bitmap[offset / 8] & 3781da177e4SLinus Torvalds (1 << (offset % 8)))) { 3795b5e0928SAlexey Dobriyan _debug("ENT[%zu.%u]: unused", 38000317636SDavid Howells blkoff / sizeof(union afs_xdr_dir_block), offset); 3811da177e4SLinus Torvalds if (offset >= curr) 3821bbae9f8SAl Viro ctx->pos = blkoff + 38300317636SDavid Howells next * sizeof(union afs_xdr_dirent); 3841da177e4SLinus Torvalds continue; 3851da177e4SLinus Torvalds } 3861da177e4SLinus Torvalds 3871da177e4SLinus Torvalds /* got a valid entry */ 3881da177e4SLinus Torvalds dire = &block->dirents[offset]; 3891da177e4SLinus Torvalds nlen = strnlen(dire->u.name, 3901da177e4SLinus Torvalds sizeof(*block) - 39100317636SDavid Howells offset * sizeof(union afs_xdr_dirent)); 3921da177e4SLinus Torvalds 3935b5e0928SAlexey Dobriyan _debug("ENT[%zu.%u]: %s %zu \"%s\"", 39400317636SDavid Howells blkoff / sizeof(union afs_xdr_dir_block), offset, 3951da177e4SLinus Torvalds (offset < curr ? "skip" : "fill"), 3961da177e4SLinus Torvalds nlen, dire->u.name); 3971da177e4SLinus Torvalds 3981da177e4SLinus Torvalds /* work out where the next possible entry is */ 39900317636SDavid Howells for (tmp = nlen; tmp > 15; tmp -= sizeof(union afs_xdr_dirent)) { 4004ea219a8SDavid Howells if (next >= AFS_DIR_SLOTS_PER_BLOCK) { 4015b5e0928SAlexey Dobriyan _debug("ENT[%zu.%u]:" 4021da177e4SLinus Torvalds " %u travelled beyond end dir block" 4035b5e0928SAlexey Dobriyan " (len %u/%zu)", 40400317636SDavid Howells blkoff / sizeof(union afs_xdr_dir_block), 4051da177e4SLinus Torvalds offset, next, tmp, nlen); 406f51375cdSDavid Howells return afs_bad(dvnode, afs_file_error_dir_over_end); 4071da177e4SLinus Torvalds } 40800317636SDavid Howells if (!(block->hdr.bitmap[next / 8] & 4091da177e4SLinus Torvalds (1 << (next % 8)))) { 4105b5e0928SAlexey Dobriyan _debug("ENT[%zu.%u]:" 4115b5e0928SAlexey Dobriyan " %u unmarked extension (len %u/%zu)", 41200317636SDavid Howells blkoff / sizeof(union afs_xdr_dir_block), 4131da177e4SLinus Torvalds offset, next, tmp, nlen); 414f51375cdSDavid Howells return afs_bad(dvnode, afs_file_error_dir_unmarked_ext); 4151da177e4SLinus Torvalds } 4161da177e4SLinus Torvalds 4175b5e0928SAlexey Dobriyan _debug("ENT[%zu.%u]: ext %u/%zu", 41800317636SDavid Howells blkoff / sizeof(union afs_xdr_dir_block), 4191da177e4SLinus Torvalds next, tmp, nlen); 4201da177e4SLinus Torvalds next++; 4211da177e4SLinus Torvalds } 4221da177e4SLinus Torvalds 4231da177e4SLinus Torvalds /* skip if starts before the current position */ 4241da177e4SLinus Torvalds if (offset < curr) 4251da177e4SLinus Torvalds continue; 4261da177e4SLinus Torvalds 4271da177e4SLinus Torvalds /* found the next entry */ 4281bbae9f8SAl Viro if (!dir_emit(ctx, dire->u.name, nlen, 4291da177e4SLinus Torvalds ntohl(dire->u.vnode), 4305cf9dd55SDavid Howells (ctx->actor == afs_lookup_filldir || 4315cf9dd55SDavid Howells ctx->actor == afs_lookup_one_filldir)? 4321bbae9f8SAl Viro ntohl(dire->u.unique) : DT_UNKNOWN)) { 4331da177e4SLinus Torvalds _leave(" = 0 [full]"); 4341da177e4SLinus Torvalds return 0; 4351da177e4SLinus Torvalds } 4361da177e4SLinus Torvalds 43700317636SDavid Howells ctx->pos = blkoff + next * sizeof(union afs_xdr_dirent); 4381da177e4SLinus Torvalds } 4391da177e4SLinus Torvalds 4401da177e4SLinus Torvalds _leave(" = 1 [more]"); 4411da177e4SLinus Torvalds return 1; 442ec26815aSDavid Howells } 4431da177e4SLinus Torvalds 4441da177e4SLinus Torvalds /* 44508e0e7c8SDavid Howells * iterate through the data blob that lists the contents of an AFS directory 4461da177e4SLinus Torvalds */ 4471bbae9f8SAl Viro static int afs_dir_iterate(struct inode *dir, struct dir_context *ctx, 4481bbae9f8SAl Viro struct key *key) 4491da177e4SLinus Torvalds { 450f3ddee8dSDavid Howells struct afs_vnode *dvnode = AFS_FS_I(dir); 45100317636SDavid Howells struct afs_xdr_dir_page *dbuf; 45200317636SDavid Howells union afs_xdr_dir_block *dblock; 453f3ddee8dSDavid Howells struct afs_read *req; 4541da177e4SLinus Torvalds struct page *page; 4551da177e4SLinus Torvalds unsigned blkoff, limit; 4561da177e4SLinus Torvalds int ret; 4571da177e4SLinus Torvalds 4581bbae9f8SAl Viro _enter("{%lu},%u,,", dir->i_ino, (unsigned)ctx->pos); 4591da177e4SLinus Torvalds 46008e0e7c8SDavid Howells if (test_bit(AFS_VNODE_DELETED, &AFS_FS_I(dir)->flags)) { 4611da177e4SLinus Torvalds _leave(" = -ESTALE"); 4621da177e4SLinus Torvalds return -ESTALE; 4631da177e4SLinus Torvalds } 4641da177e4SLinus Torvalds 465f3ddee8dSDavid Howells req = afs_read_dir(dvnode, key); 466f3ddee8dSDavid Howells if (IS_ERR(req)) 467f3ddee8dSDavid Howells return PTR_ERR(req); 468f3ddee8dSDavid Howells 4691da177e4SLinus Torvalds /* round the file position up to the next entry boundary */ 47000317636SDavid Howells ctx->pos += sizeof(union afs_xdr_dirent) - 1; 47100317636SDavid Howells ctx->pos &= ~(sizeof(union afs_xdr_dirent) - 1); 4721da177e4SLinus Torvalds 4731da177e4SLinus Torvalds /* walk through the blocks in sequence */ 4741da177e4SLinus Torvalds ret = 0; 475f3ddee8dSDavid Howells while (ctx->pos < req->actual_len) { 47600317636SDavid Howells blkoff = ctx->pos & ~(sizeof(union afs_xdr_dir_block) - 1); 4771da177e4SLinus Torvalds 478f3ddee8dSDavid Howells /* Fetch the appropriate page from the directory and re-add it 479f3ddee8dSDavid Howells * to the LRU. 480f3ddee8dSDavid Howells */ 481f3ddee8dSDavid Howells page = req->pages[blkoff / PAGE_SIZE]; 482f3ddee8dSDavid Howells if (!page) { 483f51375cdSDavid Howells ret = afs_bad(dvnode, afs_file_error_dir_missing_page); 4841da177e4SLinus Torvalds break; 4851da177e4SLinus Torvalds } 486f3ddee8dSDavid Howells mark_page_accessed(page); 4871da177e4SLinus Torvalds 4881da177e4SLinus Torvalds limit = blkoff & ~(PAGE_SIZE - 1); 4891da177e4SLinus Torvalds 490f3ddee8dSDavid Howells dbuf = kmap(page); 4911da177e4SLinus Torvalds 4921da177e4SLinus Torvalds /* deal with the individual blocks stashed on this page */ 4931da177e4SLinus Torvalds do { 4941da177e4SLinus Torvalds dblock = &dbuf->blocks[(blkoff % PAGE_SIZE) / 49500317636SDavid Howells sizeof(union afs_xdr_dir_block)]; 496f51375cdSDavid Howells ret = afs_dir_iterate_block(dvnode, ctx, dblock, blkoff); 4971da177e4SLinus Torvalds if (ret != 1) { 498f3ddee8dSDavid Howells kunmap(page); 4991da177e4SLinus Torvalds goto out; 5001da177e4SLinus Torvalds } 5011da177e4SLinus Torvalds 50200317636SDavid Howells blkoff += sizeof(union afs_xdr_dir_block); 5031da177e4SLinus Torvalds 5041bbae9f8SAl Viro } while (ctx->pos < dir->i_size && blkoff < limit); 5051da177e4SLinus Torvalds 506f3ddee8dSDavid Howells kunmap(page); 5071da177e4SLinus Torvalds ret = 0; 5081da177e4SLinus Torvalds } 5091da177e4SLinus Torvalds 5101da177e4SLinus Torvalds out: 511b61f7dcfSDavid Howells up_read(&dvnode->validate_lock); 512f3ddee8dSDavid Howells afs_put_read(req); 5131da177e4SLinus Torvalds _leave(" = %d", ret); 5141da177e4SLinus Torvalds return ret; 515ec26815aSDavid Howells } 5161da177e4SLinus Torvalds 5171da177e4SLinus Torvalds /* 5181da177e4SLinus Torvalds * read an AFS directory 5191da177e4SLinus Torvalds */ 5201bbae9f8SAl Viro static int afs_readdir(struct file *file, struct dir_context *ctx) 5211da177e4SLinus Torvalds { 522215804a9SDavid Howells return afs_dir_iterate(file_inode(file), ctx, afs_file_key(file)); 523ec26815aSDavid Howells } 5241da177e4SLinus Torvalds 5251da177e4SLinus Torvalds /* 5265cf9dd55SDavid Howells * Search the directory for a single name 5271da177e4SLinus Torvalds * - if afs_dir_iterate_block() spots this function, it'll pass the FID 5281da177e4SLinus Torvalds * uniquifier through dtype 5291da177e4SLinus Torvalds */ 5305cf9dd55SDavid Howells static int afs_lookup_one_filldir(struct dir_context *ctx, const char *name, 531ac7576f4SMiklos Szeredi int nlen, loff_t fpos, u64 ino, unsigned dtype) 5321da177e4SLinus Torvalds { 5335cf9dd55SDavid Howells struct afs_lookup_one_cookie *cookie = 5345cf9dd55SDavid Howells container_of(ctx, struct afs_lookup_one_cookie, ctx); 5351da177e4SLinus Torvalds 5361bbae9f8SAl Viro _enter("{%s,%u},%s,%u,,%llu,%u", 5371bbae9f8SAl Viro cookie->name.name, cookie->name.len, name, nlen, 538ba3e0e1aSDavid S. Miller (unsigned long long) ino, dtype); 5391da177e4SLinus Torvalds 54008e0e7c8SDavid Howells /* insanity checks first */ 54100317636SDavid Howells BUILD_BUG_ON(sizeof(union afs_xdr_dir_block) != 2048); 54200317636SDavid Howells BUILD_BUG_ON(sizeof(union afs_xdr_dirent) != 32); 54308e0e7c8SDavid Howells 5441bbae9f8SAl Viro if (cookie->name.len != nlen || 5451bbae9f8SAl Viro memcmp(cookie->name.name, name, nlen) != 0) { 5461da177e4SLinus Torvalds _leave(" = 0 [no]"); 5471da177e4SLinus Torvalds return 0; 5481da177e4SLinus Torvalds } 5491da177e4SLinus Torvalds 5501da177e4SLinus Torvalds cookie->fid.vnode = ino; 5511da177e4SLinus Torvalds cookie->fid.unique = dtype; 5521da177e4SLinus Torvalds cookie->found = 1; 5531da177e4SLinus Torvalds 5541da177e4SLinus Torvalds _leave(" = -1 [found]"); 5551da177e4SLinus Torvalds return -1; 556ec26815aSDavid Howells } 5571da177e4SLinus Torvalds 5581da177e4SLinus Torvalds /* 5595cf9dd55SDavid Howells * Do a lookup of a single name in a directory 560260a9803SDavid Howells * - just returns the FID the dentry name maps to if found 5611da177e4SLinus Torvalds */ 5625cf9dd55SDavid Howells static int afs_do_lookup_one(struct inode *dir, struct dentry *dentry, 56300d3b7a4SDavid Howells struct afs_fid *fid, struct key *key) 5641da177e4SLinus Torvalds { 5651bbae9f8SAl Viro struct afs_super_info *as = dir->i_sb->s_fs_info; 5665cf9dd55SDavid Howells struct afs_lookup_one_cookie cookie = { 5675cf9dd55SDavid Howells .ctx.actor = afs_lookup_one_filldir, 5681bbae9f8SAl Viro .name = dentry->d_name, 5691bbae9f8SAl Viro .fid.vid = as->volume->vid 5701bbae9f8SAl Viro }; 5711da177e4SLinus Torvalds int ret; 5721da177e4SLinus Torvalds 573a455589fSAl Viro _enter("{%lu},%p{%pd},", dir->i_ino, dentry, dentry); 5741da177e4SLinus Torvalds 5751da177e4SLinus Torvalds /* search the directory */ 5761bbae9f8SAl Viro ret = afs_dir_iterate(dir, &cookie.ctx, key); 5771da177e4SLinus Torvalds if (ret < 0) { 57808e0e7c8SDavid Howells _leave(" = %d [iter]", ret); 57908e0e7c8SDavid Howells return ret; 5801da177e4SLinus Torvalds } 5811da177e4SLinus Torvalds 5821da177e4SLinus Torvalds ret = -ENOENT; 5831da177e4SLinus Torvalds if (!cookie.found) { 58408e0e7c8SDavid Howells _leave(" = -ENOENT [not found]"); 58508e0e7c8SDavid Howells return -ENOENT; 58608e0e7c8SDavid Howells } 58708e0e7c8SDavid Howells 58808e0e7c8SDavid Howells *fid = cookie.fid; 5893b6492dfSDavid Howells _leave(" = 0 { vn=%llu u=%u }", fid->vnode, fid->unique); 59008e0e7c8SDavid Howells return 0; 59108e0e7c8SDavid Howells } 59208e0e7c8SDavid Howells 59308e0e7c8SDavid Howells /* 5945cf9dd55SDavid Howells * search the directory for a name 5955cf9dd55SDavid Howells * - if afs_dir_iterate_block() spots this function, it'll pass the FID 5965cf9dd55SDavid Howells * uniquifier through dtype 5975cf9dd55SDavid Howells */ 5985cf9dd55SDavid Howells static int afs_lookup_filldir(struct dir_context *ctx, const char *name, 5995cf9dd55SDavid Howells int nlen, loff_t fpos, u64 ino, unsigned dtype) 6005cf9dd55SDavid Howells { 6015cf9dd55SDavid Howells struct afs_lookup_cookie *cookie = 6025cf9dd55SDavid Howells container_of(ctx, struct afs_lookup_cookie, ctx); 6035cf9dd55SDavid Howells int ret; 6045cf9dd55SDavid Howells 6055cf9dd55SDavid Howells _enter("{%s,%u},%s,%u,,%llu,%u", 6065cf9dd55SDavid Howells cookie->name.name, cookie->name.len, name, nlen, 6075cf9dd55SDavid Howells (unsigned long long) ino, dtype); 6085cf9dd55SDavid Howells 6095cf9dd55SDavid Howells /* insanity checks first */ 61000317636SDavid Howells BUILD_BUG_ON(sizeof(union afs_xdr_dir_block) != 2048); 61100317636SDavid Howells BUILD_BUG_ON(sizeof(union afs_xdr_dirent) != 32); 6125cf9dd55SDavid Howells 6135cf9dd55SDavid Howells if (cookie->found) { 6145cf9dd55SDavid Howells if (cookie->nr_fids < 50) { 6155cf9dd55SDavid Howells cookie->fids[cookie->nr_fids].vnode = ino; 6165cf9dd55SDavid Howells cookie->fids[cookie->nr_fids].unique = dtype; 6175cf9dd55SDavid Howells cookie->nr_fids++; 6185cf9dd55SDavid Howells } 6195cf9dd55SDavid Howells } else if (cookie->name.len == nlen && 6205cf9dd55SDavid Howells memcmp(cookie->name.name, name, nlen) == 0) { 6215cf9dd55SDavid Howells cookie->fids[0].vnode = ino; 6225cf9dd55SDavid Howells cookie->fids[0].unique = dtype; 6235cf9dd55SDavid Howells cookie->found = 1; 6245cf9dd55SDavid Howells if (cookie->one_only) 6255cf9dd55SDavid Howells return -1; 6265cf9dd55SDavid Howells } 6275cf9dd55SDavid Howells 6285cf9dd55SDavid Howells ret = cookie->nr_fids >= 50 ? -1 : 0; 6295cf9dd55SDavid Howells _leave(" = %d", ret); 6305cf9dd55SDavid Howells return ret; 6315cf9dd55SDavid Howells } 6325cf9dd55SDavid Howells 6335cf9dd55SDavid Howells /* 6345cf9dd55SDavid Howells * Do a lookup in a directory. We make use of bulk lookup to query a slew of 6355cf9dd55SDavid Howells * files in one go and create inodes for them. The inode of the file we were 6365cf9dd55SDavid Howells * asked for is returned. 6375cf9dd55SDavid Howells */ 6385cf9dd55SDavid Howells static struct inode *afs_do_lookup(struct inode *dir, struct dentry *dentry, 6395cf9dd55SDavid Howells struct key *key) 6405cf9dd55SDavid Howells { 6415cf9dd55SDavid Howells struct afs_lookup_cookie *cookie; 642f642404aSDavid Howells struct afs_cb_interest *dcbi, *cbi = NULL; 6435cf9dd55SDavid Howells struct afs_super_info *as = dir->i_sb->s_fs_info; 64487182759SDavid Howells struct afs_status_cb *scb; 645b8359153SDavid Howells struct afs_iget_data iget_data; 6465cf9dd55SDavid Howells struct afs_fs_cursor fc; 647f642404aSDavid Howells struct afs_server *server; 64839db9815SDavid Howells struct afs_vnode *dvnode = AFS_FS_I(dir), *vnode; 64939db9815SDavid Howells struct inode *inode = NULL, *ti; 6505cf9dd55SDavid Howells int ret, i; 6515cf9dd55SDavid Howells 6525cf9dd55SDavid Howells _enter("{%lu},%p{%pd},", dir->i_ino, dentry, dentry); 6535cf9dd55SDavid Howells 6545cf9dd55SDavid Howells cookie = kzalloc(sizeof(struct afs_lookup_cookie), GFP_KERNEL); 6555cf9dd55SDavid Howells if (!cookie) 6565cf9dd55SDavid Howells return ERR_PTR(-ENOMEM); 6575cf9dd55SDavid Howells 6585cf9dd55SDavid Howells cookie->ctx.actor = afs_lookup_filldir; 6595cf9dd55SDavid Howells cookie->name = dentry->d_name; 6605cf9dd55SDavid Howells cookie->nr_fids = 1; /* slot 0 is saved for the fid we actually want */ 6615cf9dd55SDavid Howells 6625cf9dd55SDavid Howells read_seqlock_excl(&dvnode->cb_lock); 663f642404aSDavid Howells dcbi = rcu_dereference_protected(dvnode->cb_interest, 664f642404aSDavid Howells lockdep_is_held(&dvnode->cb_lock.lock)); 665f642404aSDavid Howells if (dcbi) { 666f642404aSDavid Howells server = dcbi->server; 667f642404aSDavid Howells if (server && 668f642404aSDavid Howells test_bit(AFS_SERVER_FL_NO_IBULK, &server->flags)) 6695cf9dd55SDavid Howells cookie->one_only = true; 670f642404aSDavid Howells } 6715cf9dd55SDavid Howells read_sequnlock_excl(&dvnode->cb_lock); 6725cf9dd55SDavid Howells 6735cf9dd55SDavid Howells for (i = 0; i < 50; i++) 6745cf9dd55SDavid Howells cookie->fids[i].vid = as->volume->vid; 6755cf9dd55SDavid Howells 6765cf9dd55SDavid Howells /* search the directory */ 6775cf9dd55SDavid Howells ret = afs_dir_iterate(dir, &cookie->ctx, key); 6785cf9dd55SDavid Howells if (ret < 0) { 6795cf9dd55SDavid Howells inode = ERR_PTR(ret); 6805cf9dd55SDavid Howells goto out; 6815cf9dd55SDavid Howells } 6825cf9dd55SDavid Howells 6835cf9dd55SDavid Howells inode = ERR_PTR(-ENOENT); 6845cf9dd55SDavid Howells if (!cookie->found) 6855cf9dd55SDavid Howells goto out; 6865cf9dd55SDavid Howells 6875cf9dd55SDavid Howells /* Check to see if we already have an inode for the primary fid. */ 688b8359153SDavid Howells iget_data.fid = cookie->fids[0]; 689b8359153SDavid Howells iget_data.volume = dvnode->volume; 690b8359153SDavid Howells iget_data.cb_v_break = dvnode->volume->cb_v_break; 691b8359153SDavid Howells iget_data.cb_s_break = 0; 692b8359153SDavid Howells inode = ilookup5(dir->i_sb, cookie->fids[0].vnode, 693b8359153SDavid Howells afs_iget5_test, &iget_data); 6945cf9dd55SDavid Howells if (inode) 6955cf9dd55SDavid Howells goto out; 6965cf9dd55SDavid Howells 6975cf9dd55SDavid Howells /* Need space for examining all the selected files */ 6985cf9dd55SDavid Howells inode = ERR_PTR(-ENOMEM); 69987182759SDavid Howells cookie->statuses = kvcalloc(cookie->nr_fids, sizeof(struct afs_status_cb), 7005cf9dd55SDavid Howells GFP_KERNEL); 7015cf9dd55SDavid Howells if (!cookie->statuses) 7025cf9dd55SDavid Howells goto out; 7035cf9dd55SDavid Howells 70439db9815SDavid Howells cookie->inodes = kcalloc(cookie->nr_fids, sizeof(struct inode *), 70539db9815SDavid Howells GFP_KERNEL); 70639db9815SDavid Howells if (!cookie->inodes) 70739db9815SDavid Howells goto out_s; 70839db9815SDavid Howells 70939db9815SDavid Howells for (i = 1; i < cookie->nr_fids; i++) { 71039db9815SDavid Howells scb = &cookie->statuses[i]; 71139db9815SDavid Howells 71239db9815SDavid Howells /* Find any inodes that already exist and get their 71339db9815SDavid Howells * callback counters. 71439db9815SDavid Howells */ 71539db9815SDavid Howells iget_data.fid = cookie->fids[i]; 71639db9815SDavid Howells ti = ilookup5_nowait(dir->i_sb, iget_data.fid.vnode, 71739db9815SDavid Howells afs_iget5_test, &iget_data); 71839db9815SDavid Howells if (!IS_ERR_OR_NULL(ti)) { 71939db9815SDavid Howells vnode = AFS_FS_I(ti); 72039db9815SDavid Howells scb->cb_break = afs_calc_vnode_cb_break(vnode); 72139db9815SDavid Howells cookie->inodes[i] = ti; 72239db9815SDavid Howells } 72339db9815SDavid Howells } 72439db9815SDavid Howells 7255cf9dd55SDavid Howells /* Try FS.InlineBulkStatus first. Abort codes for the individual 7265cf9dd55SDavid Howells * lookups contained therein are stored in the reply without aborting 7275cf9dd55SDavid Howells * the whole operation. 7285cf9dd55SDavid Howells */ 7295cf9dd55SDavid Howells if (cookie->one_only) 7305cf9dd55SDavid Howells goto no_inline_bulk_status; 7315cf9dd55SDavid Howells 7325cf9dd55SDavid Howells inode = ERR_PTR(-ERESTARTSYS); 73320b8391fSDavid Howells if (afs_begin_vnode_operation(&fc, dvnode, key, true)) { 7345cf9dd55SDavid Howells while (afs_select_fileserver(&fc)) { 7355cf9dd55SDavid Howells if (test_bit(AFS_SERVER_FL_NO_IBULK, 7365cf9dd55SDavid Howells &fc.cbi->server->flags)) { 7375cf9dd55SDavid Howells fc.ac.abort_code = RX_INVALID_OPERATION; 7385cf9dd55SDavid Howells fc.ac.error = -ECONNABORTED; 7395cf9dd55SDavid Howells break; 7405cf9dd55SDavid Howells } 741b8359153SDavid Howells iget_data.cb_v_break = dvnode->volume->cb_v_break; 742b8359153SDavid Howells iget_data.cb_s_break = fc.cbi->server->cb_s_break; 7435cf9dd55SDavid Howells afs_fs_inline_bulk_status(&fc, 7445cf9dd55SDavid Howells afs_v2net(dvnode), 7455cf9dd55SDavid Howells cookie->fids, 7465cf9dd55SDavid Howells cookie->statuses, 7475cf9dd55SDavid Howells cookie->nr_fids, NULL); 7485cf9dd55SDavid Howells } 7495cf9dd55SDavid Howells 7505cf9dd55SDavid Howells if (fc.ac.error == 0) 7515cf9dd55SDavid Howells cbi = afs_get_cb_interest(fc.cbi); 7525cf9dd55SDavid Howells if (fc.ac.abort_code == RX_INVALID_OPERATION) 7535cf9dd55SDavid Howells set_bit(AFS_SERVER_FL_NO_IBULK, &fc.cbi->server->flags); 7545cf9dd55SDavid Howells inode = ERR_PTR(afs_end_vnode_operation(&fc)); 7555cf9dd55SDavid Howells } 7565cf9dd55SDavid Howells 7575cf9dd55SDavid Howells if (!IS_ERR(inode)) 7585cf9dd55SDavid Howells goto success; 7595cf9dd55SDavid Howells if (fc.ac.abort_code != RX_INVALID_OPERATION) 7605cf9dd55SDavid Howells goto out_c; 7615cf9dd55SDavid Howells 7625cf9dd55SDavid Howells no_inline_bulk_status: 7635cf9dd55SDavid Howells /* We could try FS.BulkStatus next, but this aborts the entire op if 7645cf9dd55SDavid Howells * any of the lookups fails - so, for the moment, revert to 7655cf9dd55SDavid Howells * FS.FetchStatus for just the primary fid. 7665cf9dd55SDavid Howells */ 7675cf9dd55SDavid Howells inode = ERR_PTR(-ERESTARTSYS); 76820b8391fSDavid Howells if (afs_begin_vnode_operation(&fc, dvnode, key, true)) { 7695cf9dd55SDavid Howells while (afs_select_fileserver(&fc)) { 770b8359153SDavid Howells iget_data.cb_v_break = dvnode->volume->cb_v_break; 771b8359153SDavid Howells iget_data.cb_s_break = fc.cbi->server->cb_s_break; 77287182759SDavid Howells scb = &cookie->statuses[0]; 7735cf9dd55SDavid Howells afs_fs_fetch_status(&fc, 7745cf9dd55SDavid Howells afs_v2net(dvnode), 7755cf9dd55SDavid Howells cookie->fids, 776a58823acSDavid Howells scb, 7775cf9dd55SDavid Howells NULL); 7785cf9dd55SDavid Howells } 7795cf9dd55SDavid Howells 7805cf9dd55SDavid Howells if (fc.ac.error == 0) 7815cf9dd55SDavid Howells cbi = afs_get_cb_interest(fc.cbi); 7825cf9dd55SDavid Howells inode = ERR_PTR(afs_end_vnode_operation(&fc)); 7835cf9dd55SDavid Howells } 7845cf9dd55SDavid Howells 7855cf9dd55SDavid Howells if (IS_ERR(inode)) 7865cf9dd55SDavid Howells goto out_c; 7875cf9dd55SDavid Howells 7885cf9dd55SDavid Howells success: 7895cf9dd55SDavid Howells /* Turn all the files into inodes and save the first one - which is the 7905cf9dd55SDavid Howells * one we actually want. 7915cf9dd55SDavid Howells */ 79287182759SDavid Howells scb = &cookie->statuses[0]; 79387182759SDavid Howells if (scb->status.abort_code != 0) 79487182759SDavid Howells inode = ERR_PTR(afs_abort_to_error(scb->status.abort_code)); 7955cf9dd55SDavid Howells 7965cf9dd55SDavid Howells for (i = 0; i < cookie->nr_fids; i++) { 79787182759SDavid Howells struct afs_status_cb *scb = &cookie->statuses[i]; 79839db9815SDavid Howells 79939db9815SDavid Howells if (!scb->have_status && !scb->have_error) 80039db9815SDavid Howells continue; 80139db9815SDavid Howells 80239db9815SDavid Howells if (cookie->inodes[i]) { 80339db9815SDavid Howells afs_vnode_commit_status(&fc, AFS_FS_I(cookie->inodes[i]), 80439db9815SDavid Howells scb->cb_break, NULL, scb); 80539db9815SDavid Howells continue; 80639db9815SDavid Howells } 8075cf9dd55SDavid Howells 80887182759SDavid Howells if (scb->status.abort_code != 0) 8095cf9dd55SDavid Howells continue; 8105cf9dd55SDavid Howells 811b8359153SDavid Howells iget_data.fid = cookie->fids[i]; 812b8359153SDavid Howells ti = afs_iget(dir->i_sb, key, &iget_data, scb, cbi, dvnode); 81339db9815SDavid Howells if (!IS_ERR(ti)) 81439db9815SDavid Howells afs_cache_permit(AFS_FS_I(ti), key, 81539db9815SDavid Howells 0 /* Assume vnode->cb_break is 0 */ + 81639db9815SDavid Howells iget_data.cb_v_break, 81739db9815SDavid Howells scb); 8185cf9dd55SDavid Howells if (i == 0) { 8195cf9dd55SDavid Howells inode = ti; 8205cf9dd55SDavid Howells } else { 8215cf9dd55SDavid Howells if (!IS_ERR(ti)) 8225cf9dd55SDavid Howells iput(ti); 8235cf9dd55SDavid Howells } 8245cf9dd55SDavid Howells } 8255cf9dd55SDavid Howells 8265cf9dd55SDavid Howells out_c: 8275cf9dd55SDavid Howells afs_put_cb_interest(afs_v2net(dvnode), cbi); 82839db9815SDavid Howells if (cookie->inodes) { 82939db9815SDavid Howells for (i = 0; i < cookie->nr_fids; i++) 83039db9815SDavid Howells iput(cookie->inodes[i]); 83139db9815SDavid Howells kfree(cookie->inodes); 83239db9815SDavid Howells } 83339db9815SDavid Howells out_s: 83487182759SDavid Howells kvfree(cookie->statuses); 8355cf9dd55SDavid Howells out: 8365cf9dd55SDavid Howells kfree(cookie); 8375cf9dd55SDavid Howells return inode; 8385cf9dd55SDavid Howells } 8395cf9dd55SDavid Howells 8405cf9dd55SDavid Howells /* 8416f8880d8SDavid Howells * Look up an entry in a directory with @sys substitution. 8426f8880d8SDavid Howells */ 8436f8880d8SDavid Howells static struct dentry *afs_lookup_atsys(struct inode *dir, struct dentry *dentry, 8446f8880d8SDavid Howells struct key *key) 8456f8880d8SDavid Howells { 8466f8880d8SDavid Howells struct afs_sysnames *subs; 8476f8880d8SDavid Howells struct afs_net *net = afs_i2net(dir); 8486f8880d8SDavid Howells struct dentry *ret; 8496f8880d8SDavid Howells char *buf, *p, *name; 8506f8880d8SDavid Howells int len, i; 8516f8880d8SDavid Howells 8526f8880d8SDavid Howells _enter(""); 8536f8880d8SDavid Howells 8546f8880d8SDavid Howells ret = ERR_PTR(-ENOMEM); 8556f8880d8SDavid Howells p = buf = kmalloc(AFSNAMEMAX, GFP_KERNEL); 8566f8880d8SDavid Howells if (!buf) 8576f8880d8SDavid Howells goto out_p; 8586f8880d8SDavid Howells if (dentry->d_name.len > 4) { 8596f8880d8SDavid Howells memcpy(p, dentry->d_name.name, dentry->d_name.len - 4); 8606f8880d8SDavid Howells p += dentry->d_name.len - 4; 8616f8880d8SDavid Howells } 8626f8880d8SDavid Howells 8636f8880d8SDavid Howells /* There is an ordered list of substitutes that we have to try. */ 8646f8880d8SDavid Howells read_lock(&net->sysnames_lock); 8656f8880d8SDavid Howells subs = net->sysnames; 8666f8880d8SDavid Howells refcount_inc(&subs->usage); 8676f8880d8SDavid Howells read_unlock(&net->sysnames_lock); 8686f8880d8SDavid Howells 8696f8880d8SDavid Howells for (i = 0; i < subs->nr; i++) { 8706f8880d8SDavid Howells name = subs->subs[i]; 8716f8880d8SDavid Howells len = dentry->d_name.len - 4 + strlen(name); 8726f8880d8SDavid Howells if (len >= AFSNAMEMAX) { 8736f8880d8SDavid Howells ret = ERR_PTR(-ENAMETOOLONG); 8746f8880d8SDavid Howells goto out_s; 8756f8880d8SDavid Howells } 8766f8880d8SDavid Howells 8776f8880d8SDavid Howells strcpy(p, name); 8786f8880d8SDavid Howells ret = lookup_one_len(buf, dentry->d_parent, len); 8796f8880d8SDavid Howells if (IS_ERR(ret) || d_is_positive(ret)) 8806f8880d8SDavid Howells goto out_s; 8816f8880d8SDavid Howells dput(ret); 8826f8880d8SDavid Howells } 8836f8880d8SDavid Howells 8846f8880d8SDavid Howells /* We don't want to d_add() the @sys dentry here as we don't want to 8856f8880d8SDavid Howells * the cached dentry to hide changes to the sysnames list. 8866f8880d8SDavid Howells */ 8876f8880d8SDavid Howells ret = NULL; 8886f8880d8SDavid Howells out_s: 8896f8880d8SDavid Howells afs_put_sysnames(subs); 8906f8880d8SDavid Howells kfree(buf); 8916f8880d8SDavid Howells out_p: 8926f8880d8SDavid Howells key_put(key); 8936f8880d8SDavid Howells return ret; 8946f8880d8SDavid Howells } 8956f8880d8SDavid Howells 8966f8880d8SDavid Howells /* 89708e0e7c8SDavid Howells * look up an entry in a directory 89808e0e7c8SDavid Howells */ 899260a9803SDavid Howells static struct dentry *afs_lookup(struct inode *dir, struct dentry *dentry, 90000cd8dd3SAl Viro unsigned int flags) 90108e0e7c8SDavid Howells { 9025cf9dd55SDavid Howells struct afs_vnode *dvnode = AFS_FS_I(dir); 90308e0e7c8SDavid Howells struct inode *inode; 90434b2a88fSAl Viro struct dentry *d; 90500d3b7a4SDavid Howells struct key *key; 90608e0e7c8SDavid Howells int ret; 90708e0e7c8SDavid Howells 9083b6492dfSDavid Howells _enter("{%llx:%llu},%p{%pd},", 9095cf9dd55SDavid Howells dvnode->fid.vid, dvnode->fid.vnode, dentry, dentry); 910260a9803SDavid Howells 9112b0143b5SDavid Howells ASSERTCMP(d_inode(dentry), ==, NULL); 91208e0e7c8SDavid Howells 91345222b9eSDavid Howells if (dentry->d_name.len >= AFSNAMEMAX) { 91408e0e7c8SDavid Howells _leave(" = -ENAMETOOLONG"); 91508e0e7c8SDavid Howells return ERR_PTR(-ENAMETOOLONG); 91608e0e7c8SDavid Howells } 91708e0e7c8SDavid Howells 9185cf9dd55SDavid Howells if (test_bit(AFS_VNODE_DELETED, &dvnode->flags)) { 91908e0e7c8SDavid Howells _leave(" = -ESTALE"); 92008e0e7c8SDavid Howells return ERR_PTR(-ESTALE); 92108e0e7c8SDavid Howells } 92208e0e7c8SDavid Howells 9235cf9dd55SDavid Howells key = afs_request_key(dvnode->volume->cell); 92400d3b7a4SDavid Howells if (IS_ERR(key)) { 92500d3b7a4SDavid Howells _leave(" = %ld [key]", PTR_ERR(key)); 926e231c2eeSDavid Howells return ERR_CAST(key); 92700d3b7a4SDavid Howells } 92800d3b7a4SDavid Howells 9295cf9dd55SDavid Howells ret = afs_validate(dvnode, key); 93008e0e7c8SDavid Howells if (ret < 0) { 93100d3b7a4SDavid Howells key_put(key); 932260a9803SDavid Howells _leave(" = %d [val]", ret); 9331da177e4SLinus Torvalds return ERR_PTR(ret); 9341da177e4SLinus Torvalds } 9351da177e4SLinus Torvalds 9366f8880d8SDavid Howells if (dentry->d_name.len >= 4 && 9376f8880d8SDavid Howells dentry->d_name.name[dentry->d_name.len - 4] == '@' && 9386f8880d8SDavid Howells dentry->d_name.name[dentry->d_name.len - 3] == 's' && 9396f8880d8SDavid Howells dentry->d_name.name[dentry->d_name.len - 2] == 'y' && 9406f8880d8SDavid Howells dentry->d_name.name[dentry->d_name.len - 1] == 's') 9416f8880d8SDavid Howells return afs_lookup_atsys(dir, dentry, key); 9426f8880d8SDavid Howells 943d55b4da4SDavid Howells afs_stat_v(dvnode, n_lookup); 9445cf9dd55SDavid Howells inode = afs_do_lookup(dir, dentry, key); 94534b2a88fSAl Viro key_put(key); 94634b2a88fSAl Viro if (inode == ERR_PTR(-ENOENT)) { 9475cf9dd55SDavid Howells inode = afs_try_auto_mntpt(dentry, dir); 94834b2a88fSAl Viro } else { 94934b2a88fSAl Viro dentry->d_fsdata = 95034b2a88fSAl Viro (void *)(unsigned long)dvnode->status.data_version; 951bec5eb61Swanglei } 95234b2a88fSAl Viro d = d_splice_alias(inode, dentry); 95380548b03SDavid Howells if (!IS_ERR_OR_NULL(d)) { 95434b2a88fSAl Viro d->d_fsdata = dentry->d_fsdata; 95580548b03SDavid Howells trace_afs_lookup(dvnode, &d->d_name, 95680548b03SDavid Howells inode ? AFS_FS_I(inode) : NULL); 95780548b03SDavid Howells } else { 95880548b03SDavid Howells trace_afs_lookup(dvnode, &dentry->d_name, 95980548b03SDavid Howells inode ? AFS_FS_I(inode) : NULL); 96080548b03SDavid Howells } 96134b2a88fSAl Viro return d; 962ec26815aSDavid Howells } 9631da177e4SLinus Torvalds 9641da177e4SLinus Torvalds /* 9651da177e4SLinus Torvalds * check that a dentry lookup hit has found a valid entry 9661da177e4SLinus Torvalds * - NOTE! the hit can be a negative hit too, so we can't assume we have an 9671da177e4SLinus Torvalds * inode 9681da177e4SLinus Torvalds */ 9690b728e19SAl Viro static int afs_d_revalidate(struct dentry *dentry, unsigned int flags) 9701da177e4SLinus Torvalds { 971260a9803SDavid Howells struct afs_vnode *vnode, *dir; 972dd0d9a46SArtem Bityutskiy struct afs_fid uninitialized_var(fid); 9731da177e4SLinus Torvalds struct dentry *parent; 974c435ee34SDavid Howells struct inode *inode; 97500d3b7a4SDavid Howells struct key *key; 976a4ff7401SDavid Howells long dir_version, de_version; 9771da177e4SLinus Torvalds int ret; 9781da177e4SLinus Torvalds 9790b728e19SAl Viro if (flags & LOOKUP_RCU) 98034286d66SNick Piggin return -ECHILD; 98134286d66SNick Piggin 982c435ee34SDavid Howells if (d_really_is_positive(dentry)) { 9832b0143b5SDavid Howells vnode = AFS_FS_I(d_inode(dentry)); 9843b6492dfSDavid Howells _enter("{v={%llx:%llu} n=%pd fl=%lx},", 985a455589fSAl Viro vnode->fid.vid, vnode->fid.vnode, dentry, 986260a9803SDavid Howells vnode->flags); 987c435ee34SDavid Howells } else { 988a455589fSAl Viro _enter("{neg n=%pd}", dentry); 989c435ee34SDavid Howells } 9901da177e4SLinus Torvalds 991260a9803SDavid Howells key = afs_request_key(AFS_FS_S(dentry->d_sb)->volume->cell); 99200d3b7a4SDavid Howells if (IS_ERR(key)) 99300d3b7a4SDavid Howells key = NULL; 99400d3b7a4SDavid Howells 995c435ee34SDavid Howells if (d_really_is_positive(dentry)) { 996c435ee34SDavid Howells inode = d_inode(dentry); 997c435ee34SDavid Howells if (inode) { 998c435ee34SDavid Howells vnode = AFS_FS_I(inode); 999c435ee34SDavid Howells afs_validate(vnode, key); 1000c435ee34SDavid Howells if (test_bit(AFS_VNODE_DELETED, &vnode->flags)) 1001c435ee34SDavid Howells goto out_bad; 1002c435ee34SDavid Howells } 1003c435ee34SDavid Howells } 1004c435ee34SDavid Howells 10051da177e4SLinus Torvalds /* lock down the parent dentry so we can peer at it */ 100608e0e7c8SDavid Howells parent = dget_parent(dentry); 10072b0143b5SDavid Howells dir = AFS_FS_I(d_inode(parent)); 10081da177e4SLinus Torvalds 1009260a9803SDavid Howells /* validate the parent directory */ 1010260a9803SDavid Howells afs_validate(dir, key); 1011260a9803SDavid Howells 1012260a9803SDavid Howells if (test_bit(AFS_VNODE_DELETED, &dir->flags)) { 1013a455589fSAl Viro _debug("%pd: parent dir deleted", dentry); 1014c435ee34SDavid Howells goto out_bad_parent; 10151da177e4SLinus Torvalds } 10161da177e4SLinus Torvalds 1017a4ff7401SDavid Howells /* We only need to invalidate a dentry if the server's copy changed 1018a4ff7401SDavid Howells * behind our back. If we made the change, it's no problem. Note that 1019a4ff7401SDavid Howells * on a 32-bit system, we only have 32 bits in the dentry to store the 1020a4ff7401SDavid Howells * version. 1021a4ff7401SDavid Howells */ 1022a4ff7401SDavid Howells dir_version = (long)dir->status.data_version; 1023a4ff7401SDavid Howells de_version = (long)dentry->d_fsdata; 1024a4ff7401SDavid Howells if (de_version == dir_version) 1025a4ff7401SDavid Howells goto out_valid; 1026a4ff7401SDavid Howells 1027a4ff7401SDavid Howells dir_version = (long)dir->invalid_before; 1028a4ff7401SDavid Howells if (de_version - dir_version >= 0) 1029a4ff7401SDavid Howells goto out_valid; 1030260a9803SDavid Howells 103108e0e7c8SDavid Howells _debug("dir modified"); 1032d55b4da4SDavid Howells afs_stat_v(dir, n_reval); 10331da177e4SLinus Torvalds 10341da177e4SLinus Torvalds /* search the directory for this vnode */ 10355cf9dd55SDavid Howells ret = afs_do_lookup_one(&dir->vfs_inode, dentry, &fid, key); 1036260a9803SDavid Howells switch (ret) { 1037260a9803SDavid Howells case 0: 1038260a9803SDavid Howells /* the filename maps to something */ 10392b0143b5SDavid Howells if (d_really_is_negative(dentry)) 1040c435ee34SDavid Howells goto out_bad_parent; 1041c435ee34SDavid Howells inode = d_inode(dentry); 1042c435ee34SDavid Howells if (is_bad_inode(inode)) { 1043a455589fSAl Viro printk("kAFS: afs_d_revalidate: %pd2 has bad inode\n", 1044a455589fSAl Viro dentry); 1045c435ee34SDavid Howells goto out_bad_parent; 10461da177e4SLinus Torvalds } 10471da177e4SLinus Torvalds 1048c435ee34SDavid Howells vnode = AFS_FS_I(inode); 1049c435ee34SDavid Howells 10501da177e4SLinus Torvalds /* if the vnode ID has changed, then the dirent points to a 10511da177e4SLinus Torvalds * different file */ 105208e0e7c8SDavid Howells if (fid.vnode != vnode->fid.vnode) { 10533b6492dfSDavid Howells _debug("%pd: dirent changed [%llu != %llu]", 1054a455589fSAl Viro dentry, fid.vnode, 105508e0e7c8SDavid Howells vnode->fid.vnode); 10561da177e4SLinus Torvalds goto not_found; 10571da177e4SLinus Torvalds } 10581da177e4SLinus Torvalds 10591da177e4SLinus Torvalds /* if the vnode ID uniqifier has changed, then the file has 1060260a9803SDavid Howells * been deleted and replaced, and the original vnode ID has 1061260a9803SDavid Howells * been reused */ 106208e0e7c8SDavid Howells if (fid.unique != vnode->fid.unique) { 1063a455589fSAl Viro _debug("%pd: file deleted (uq %u -> %u I:%u)", 1064a455589fSAl Viro dentry, fid.unique, 10657a224228SJean Noel Cordenner vnode->fid.unique, 1066c435ee34SDavid Howells vnode->vfs_inode.i_generation); 1067c435ee34SDavid Howells write_seqlock(&vnode->cb_lock); 106808e0e7c8SDavid Howells set_bit(AFS_VNODE_DELETED, &vnode->flags); 1069c435ee34SDavid Howells write_sequnlock(&vnode->cb_lock); 1070260a9803SDavid Howells goto not_found; 1071260a9803SDavid Howells } 1072260a9803SDavid Howells goto out_valid; 1073260a9803SDavid Howells 1074260a9803SDavid Howells case -ENOENT: 1075260a9803SDavid Howells /* the filename is unknown */ 1076a455589fSAl Viro _debug("%pd: dirent not found", dentry); 10772b0143b5SDavid Howells if (d_really_is_positive(dentry)) 1078260a9803SDavid Howells goto not_found; 1079260a9803SDavid Howells goto out_valid; 1080260a9803SDavid Howells 1081260a9803SDavid Howells default: 1082a455589fSAl Viro _debug("failed to iterate dir %pd: %d", 1083a455589fSAl Viro parent, ret); 1084c435ee34SDavid Howells goto out_bad_parent; 10851da177e4SLinus Torvalds } 108608e0e7c8SDavid Howells 10871da177e4SLinus Torvalds out_valid: 1088a4ff7401SDavid Howells dentry->d_fsdata = (void *)dir_version; 10891da177e4SLinus Torvalds dput(parent); 109000d3b7a4SDavid Howells key_put(key); 10911da177e4SLinus Torvalds _leave(" = 1 [valid]"); 10921da177e4SLinus Torvalds return 1; 10931da177e4SLinus Torvalds 10941da177e4SLinus Torvalds /* the dirent, if it exists, now points to a different vnode */ 10951da177e4SLinus Torvalds not_found: 10961da177e4SLinus Torvalds spin_lock(&dentry->d_lock); 10971da177e4SLinus Torvalds dentry->d_flags |= DCACHE_NFSFS_RENAMED; 10981da177e4SLinus Torvalds spin_unlock(&dentry->d_lock); 10991da177e4SLinus Torvalds 1100c435ee34SDavid Howells out_bad_parent: 1101a455589fSAl Viro _debug("dropping dentry %pd2", dentry); 11021da177e4SLinus Torvalds dput(parent); 1103c435ee34SDavid Howells out_bad: 110400d3b7a4SDavid Howells key_put(key); 11051da177e4SLinus Torvalds 11061da177e4SLinus Torvalds _leave(" = 0 [bad]"); 11071da177e4SLinus Torvalds return 0; 1108ec26815aSDavid Howells } 11091da177e4SLinus Torvalds 11101da177e4SLinus Torvalds /* 11111da177e4SLinus Torvalds * allow the VFS to enquire as to whether a dentry should be unhashed (mustn't 11121da177e4SLinus Torvalds * sleep) 11131da177e4SLinus Torvalds * - called from dput() when d_count is going to 0. 11141da177e4SLinus Torvalds * - return 1 to request dentry be unhashed, 0 otherwise 11151da177e4SLinus Torvalds */ 1116fe15ce44SNick Piggin static int afs_d_delete(const struct dentry *dentry) 11171da177e4SLinus Torvalds { 1118a455589fSAl Viro _enter("%pd", dentry); 11191da177e4SLinus Torvalds 11201da177e4SLinus Torvalds if (dentry->d_flags & DCACHE_NFSFS_RENAMED) 11211da177e4SLinus Torvalds goto zap; 11221da177e4SLinus Torvalds 11232b0143b5SDavid Howells if (d_really_is_positive(dentry) && 11242b0143b5SDavid Howells (test_bit(AFS_VNODE_DELETED, &AFS_FS_I(d_inode(dentry))->flags) || 11252b0143b5SDavid Howells test_bit(AFS_VNODE_PSEUDODIR, &AFS_FS_I(d_inode(dentry))->flags))) 11261da177e4SLinus Torvalds goto zap; 11271da177e4SLinus Torvalds 11281da177e4SLinus Torvalds _leave(" = 0 [keep]"); 11291da177e4SLinus Torvalds return 0; 11301da177e4SLinus Torvalds 11311da177e4SLinus Torvalds zap: 11321da177e4SLinus Torvalds _leave(" = 1 [zap]"); 11331da177e4SLinus Torvalds return 1; 1134ec26815aSDavid Howells } 1135260a9803SDavid Howells 1136260a9803SDavid Howells /* 113779ddbfa5SDavid Howells * Clean up sillyrename files on dentry removal. 113879ddbfa5SDavid Howells */ 113979ddbfa5SDavid Howells static void afs_d_iput(struct dentry *dentry, struct inode *inode) 114079ddbfa5SDavid Howells { 114179ddbfa5SDavid Howells if (dentry->d_flags & DCACHE_NFSFS_RENAMED) 114279ddbfa5SDavid Howells afs_silly_iput(dentry, inode); 114379ddbfa5SDavid Howells iput(inode); 114479ddbfa5SDavid Howells } 114579ddbfa5SDavid Howells 114679ddbfa5SDavid Howells /* 1147260a9803SDavid Howells * handle dentry release 1148260a9803SDavid Howells */ 114966c7e1d3SDavid Howells void afs_d_release(struct dentry *dentry) 1150260a9803SDavid Howells { 1151a455589fSAl Viro _enter("%pd", dentry); 1152260a9803SDavid Howells } 1153260a9803SDavid Howells 1154260a9803SDavid Howells /* 1155d2ddc776SDavid Howells * Create a new inode for create/mkdir/symlink 1156d2ddc776SDavid Howells */ 1157d2ddc776SDavid Howells static void afs_vnode_new_inode(struct afs_fs_cursor *fc, 1158d2ddc776SDavid Howells struct dentry *new_dentry, 1159b8359153SDavid Howells struct afs_iget_data *new_data, 1160a58823acSDavid Howells struct afs_status_cb *new_scb) 1161d2ddc776SDavid Howells { 11625a813276SDavid Howells struct afs_vnode *vnode; 1163d2ddc776SDavid Howells struct inode *inode; 1164d2ddc776SDavid Howells 1165d2ddc776SDavid Howells if (fc->ac.error < 0) 1166d2ddc776SDavid Howells return; 1167d2ddc776SDavid Howells 1168d2ddc776SDavid Howells inode = afs_iget(fc->vnode->vfs_inode.i_sb, fc->key, 1169b8359153SDavid Howells new_data, new_scb, fc->cbi, fc->vnode); 1170d2ddc776SDavid Howells if (IS_ERR(inode)) { 1171d2ddc776SDavid Howells /* ENOMEM or EINTR at a really inconvenient time - just abandon 1172d2ddc776SDavid Howells * the new directory on the server. 1173d2ddc776SDavid Howells */ 1174d2ddc776SDavid Howells fc->ac.error = PTR_ERR(inode); 1175d2ddc776SDavid Howells return; 1176d2ddc776SDavid Howells } 1177d2ddc776SDavid Howells 11785a813276SDavid Howells vnode = AFS_FS_I(inode); 11795a813276SDavid Howells set_bit(AFS_VNODE_NEW_CONTENT, &vnode->flags); 1180a58823acSDavid Howells if (fc->ac.error == 0) 1181a58823acSDavid Howells afs_cache_permit(vnode, fc->key, vnode->cb_break, new_scb); 118273116df7SDavid Howells d_instantiate(new_dentry, inode); 1183d2ddc776SDavid Howells } 1184d2ddc776SDavid Howells 1185b8359153SDavid Howells static void afs_prep_for_new_inode(struct afs_fs_cursor *fc, 1186b8359153SDavid Howells struct afs_iget_data *iget_data) 1187b8359153SDavid Howells { 1188b8359153SDavid Howells iget_data->volume = fc->vnode->volume; 1189b8359153SDavid Howells iget_data->cb_v_break = fc->vnode->volume->cb_v_break; 1190b8359153SDavid Howells iget_data->cb_s_break = fc->cbi->server->cb_s_break; 1191b8359153SDavid Howells } 1192b8359153SDavid Howells 1193d2ddc776SDavid Howells /* 1194260a9803SDavid Howells * create a directory on an AFS filesystem 1195260a9803SDavid Howells */ 119618bb1db3SAl Viro static int afs_mkdir(struct inode *dir, struct dentry *dentry, umode_t mode) 1197260a9803SDavid Howells { 1198b8359153SDavid Howells struct afs_iget_data iget_data; 1199a58823acSDavid Howells struct afs_status_cb *scb; 1200d2ddc776SDavid Howells struct afs_fs_cursor fc; 1201d2ddc776SDavid Howells struct afs_vnode *dvnode = AFS_FS_I(dir); 1202260a9803SDavid Howells struct key *key; 1203260a9803SDavid Howells int ret; 1204260a9803SDavid Howells 1205d2ddc776SDavid Howells mode |= S_IFDIR; 1206260a9803SDavid Howells 12073b6492dfSDavid Howells _enter("{%llx:%llu},{%pd},%ho", 1208a455589fSAl Viro dvnode->fid.vid, dvnode->fid.vnode, dentry, mode); 1209260a9803SDavid Howells 1210a58823acSDavid Howells ret = -ENOMEM; 1211a58823acSDavid Howells scb = kcalloc(2, sizeof(struct afs_status_cb), GFP_KERNEL); 1212a58823acSDavid Howells if (!scb) 1213a58823acSDavid Howells goto error; 1214a58823acSDavid Howells 1215260a9803SDavid Howells key = afs_request_key(dvnode->volume->cell); 1216260a9803SDavid Howells if (IS_ERR(key)) { 1217260a9803SDavid Howells ret = PTR_ERR(key); 1218a58823acSDavid Howells goto error_scb; 1219260a9803SDavid Howells } 1220260a9803SDavid Howells 1221d2ddc776SDavid Howells ret = -ERESTARTSYS; 122220b8391fSDavid Howells if (afs_begin_vnode_operation(&fc, dvnode, key, true)) { 1223a58823acSDavid Howells afs_dataversion_t data_version = dvnode->status.data_version + 1; 1224a58823acSDavid Howells 1225d2ddc776SDavid Howells while (afs_select_fileserver(&fc)) { 122668251f0aSDavid Howells fc.cb_break = afs_calc_vnode_cb_break(dvnode); 1227b8359153SDavid Howells afs_prep_for_new_inode(&fc, &iget_data); 1228a58823acSDavid Howells afs_fs_create(&fc, dentry->d_name.name, mode, 1229b8359153SDavid Howells &scb[0], &iget_data.fid, &scb[1]); 1230d2ddc776SDavid Howells } 1231d2ddc776SDavid Howells 1232a58823acSDavid Howells afs_check_for_remote_deletion(&fc, dvnode); 1233a58823acSDavid Howells afs_vnode_commit_status(&fc, dvnode, fc.cb_break, 1234a58823acSDavid Howells &data_version, &scb[0]); 1235b8359153SDavid Howells afs_vnode_new_inode(&fc, dentry, &iget_data, &scb[1]); 1236d2ddc776SDavid Howells ret = afs_end_vnode_operation(&fc); 1237260a9803SDavid Howells if (ret < 0) 1238d2ddc776SDavid Howells goto error_key; 12394433b691SDavid Howells } else { 12404433b691SDavid Howells goto error_key; 1241260a9803SDavid Howells } 1242260a9803SDavid Howells 124363a4681fSDavid Howells if (ret == 0 && 124463a4681fSDavid Howells test_bit(AFS_VNODE_DIR_VALID, &dvnode->flags)) 1245b8359153SDavid Howells afs_edit_dir_add(dvnode, &dentry->d_name, &iget_data.fid, 124663a4681fSDavid Howells afs_edit_dir_for_create); 124763a4681fSDavid Howells 1248260a9803SDavid Howells key_put(key); 1249a58823acSDavid Howells kfree(scb); 1250260a9803SDavid Howells _leave(" = 0"); 1251260a9803SDavid Howells return 0; 1252260a9803SDavid Howells 1253d2ddc776SDavid Howells error_key: 1254260a9803SDavid Howells key_put(key); 1255a58823acSDavid Howells error_scb: 1256a58823acSDavid Howells kfree(scb); 1257260a9803SDavid Howells error: 1258260a9803SDavid Howells d_drop(dentry); 1259260a9803SDavid Howells _leave(" = %d", ret); 1260260a9803SDavid Howells return ret; 1261260a9803SDavid Howells } 1262260a9803SDavid Howells 1263260a9803SDavid Howells /* 1264d2ddc776SDavid Howells * Remove a subdir from a directory. 1265260a9803SDavid Howells */ 1266d2ddc776SDavid Howells static void afs_dir_remove_subdir(struct dentry *dentry) 1267260a9803SDavid Howells { 12682b0143b5SDavid Howells if (d_really_is_positive(dentry)) { 1269d2ddc776SDavid Howells struct afs_vnode *vnode = AFS_FS_I(d_inode(dentry)); 1270d2ddc776SDavid Howells 1271260a9803SDavid Howells clear_nlink(&vnode->vfs_inode); 1272260a9803SDavid Howells set_bit(AFS_VNODE_DELETED, &vnode->flags); 1273c435ee34SDavid Howells clear_bit(AFS_VNODE_CB_PROMISED, &vnode->flags); 127463a4681fSDavid Howells clear_bit(AFS_VNODE_DIR_VALID, &vnode->flags); 1275260a9803SDavid Howells } 1276260a9803SDavid Howells } 1277260a9803SDavid Howells 1278260a9803SDavid Howells /* 1279d2ddc776SDavid Howells * remove a directory from an AFS filesystem 1280260a9803SDavid Howells */ 1281d2ddc776SDavid Howells static int afs_rmdir(struct inode *dir, struct dentry *dentry) 1282260a9803SDavid Howells { 1283a58823acSDavid Howells struct afs_status_cb *scb; 1284d2ddc776SDavid Howells struct afs_fs_cursor fc; 1285f58db83fSDavid Howells struct afs_vnode *dvnode = AFS_FS_I(dir), *vnode = NULL; 1286260a9803SDavid Howells struct key *key; 1287260a9803SDavid Howells int ret; 1288260a9803SDavid Howells 12893b6492dfSDavid Howells _enter("{%llx:%llu},{%pd}", 1290a455589fSAl Viro dvnode->fid.vid, dvnode->fid.vnode, dentry); 1291260a9803SDavid Howells 1292a58823acSDavid Howells scb = kzalloc(sizeof(struct afs_status_cb), GFP_KERNEL); 1293a58823acSDavid Howells if (!scb) 1294a58823acSDavid Howells return -ENOMEM; 1295a58823acSDavid Howells 1296260a9803SDavid Howells key = afs_request_key(dvnode->volume->cell); 1297260a9803SDavid Howells if (IS_ERR(key)) { 1298260a9803SDavid Howells ret = PTR_ERR(key); 1299260a9803SDavid Howells goto error; 1300260a9803SDavid Howells } 1301260a9803SDavid Howells 1302f58db83fSDavid Howells /* Try to make sure we have a callback promise on the victim. */ 1303f58db83fSDavid Howells if (d_really_is_positive(dentry)) { 1304f58db83fSDavid Howells vnode = AFS_FS_I(d_inode(dentry)); 1305f58db83fSDavid Howells ret = afs_validate(vnode, key); 1306f58db83fSDavid Howells if (ret < 0) 1307f58db83fSDavid Howells goto error_key; 1308f58db83fSDavid Howells } 1309f58db83fSDavid Howells 131079ddbfa5SDavid Howells if (vnode) { 131179ddbfa5SDavid Howells ret = down_write_killable(&vnode->rmdir_lock); 131279ddbfa5SDavid Howells if (ret < 0) 131379ddbfa5SDavid Howells goto error_key; 131479ddbfa5SDavid Howells } 131579ddbfa5SDavid Howells 1316d2ddc776SDavid Howells ret = -ERESTARTSYS; 131720b8391fSDavid Howells if (afs_begin_vnode_operation(&fc, dvnode, key, true)) { 1318a58823acSDavid Howells afs_dataversion_t data_version = dvnode->status.data_version + 1; 1319a58823acSDavid Howells 1320d2ddc776SDavid Howells while (afs_select_fileserver(&fc)) { 132168251f0aSDavid Howells fc.cb_break = afs_calc_vnode_cb_break(dvnode); 1322a58823acSDavid Howells afs_fs_remove(&fc, vnode, dentry->d_name.name, true, scb); 1323260a9803SDavid Howells } 1324260a9803SDavid Howells 1325a58823acSDavid Howells afs_vnode_commit_status(&fc, dvnode, fc.cb_break, 1326a58823acSDavid Howells &data_version, scb); 1327d2ddc776SDavid Howells ret = afs_end_vnode_operation(&fc); 132863a4681fSDavid Howells if (ret == 0) { 1329d2ddc776SDavid Howells afs_dir_remove_subdir(dentry); 133063a4681fSDavid Howells if (test_bit(AFS_VNODE_DIR_VALID, &dvnode->flags)) 133163a4681fSDavid Howells afs_edit_dir_remove(dvnode, &dentry->d_name, 133263a4681fSDavid Howells afs_edit_dir_for_rmdir); 133363a4681fSDavid Howells } 1334260a9803SDavid Howells } 1335260a9803SDavid Howells 133679ddbfa5SDavid Howells if (vnode) 133779ddbfa5SDavid Howells up_write(&vnode->rmdir_lock); 1338f58db83fSDavid Howells error_key: 1339260a9803SDavid Howells key_put(key); 1340d2ddc776SDavid Howells error: 1341a58823acSDavid Howells kfree(scb); 1342d2ddc776SDavid Howells return ret; 1343d2ddc776SDavid Howells } 1344260a9803SDavid Howells 1345d2ddc776SDavid Howells /* 1346d2ddc776SDavid Howells * Remove a link to a file or symlink from a directory. 1347d2ddc776SDavid Howells * 1348d2ddc776SDavid Howells * If the file was not deleted due to excess hard links, the fileserver will 1349d2ddc776SDavid Howells * break the callback promise on the file - if it had one - before it returns 1350d2ddc776SDavid Howells * to us, and if it was deleted, it won't 1351d2ddc776SDavid Howells * 1352d2ddc776SDavid Howells * However, if we didn't have a callback promise outstanding, or it was 1353d2ddc776SDavid Howells * outstanding on a different server, then it won't break it either... 1354d2ddc776SDavid Howells */ 1355a38a7558SDavid Howells static int afs_dir_remove_link(struct afs_vnode *dvnode, struct dentry *dentry, 1356a38a7558SDavid Howells struct key *key) 1357d2ddc776SDavid Howells { 1358d2ddc776SDavid Howells int ret = 0; 1359d2ddc776SDavid Howells 1360d2ddc776SDavid Howells if (d_really_is_positive(dentry)) { 1361d2ddc776SDavid Howells struct afs_vnode *vnode = AFS_FS_I(d_inode(dentry)); 1362d2ddc776SDavid Howells 136330062bd1SDavid Howells if (test_bit(AFS_VNODE_DELETED, &vnode->flags)) { 136430062bd1SDavid Howells /* Already done */ 1365a38a7558SDavid Howells } else if (test_bit(AFS_VNODE_DIR_VALID, &dvnode->flags)) { 1366a38a7558SDavid Howells write_seqlock(&vnode->cb_lock); 1367440fbc3aSDavid Howells drop_nlink(&vnode->vfs_inode); 1368440fbc3aSDavid Howells if (vnode->vfs_inode.i_nlink == 0) { 1369440fbc3aSDavid Howells set_bit(AFS_VNODE_DELETED, &vnode->flags); 1370a38a7558SDavid Howells __afs_break_callback(vnode); 1371440fbc3aSDavid Howells } 1372a38a7558SDavid Howells write_sequnlock(&vnode->cb_lock); 1373440fbc3aSDavid Howells ret = 0; 1374440fbc3aSDavid Howells } else { 1375a38a7558SDavid Howells afs_break_callback(vnode); 1376440fbc3aSDavid Howells 1377d2ddc776SDavid Howells if (test_bit(AFS_VNODE_DELETED, &vnode->flags)) 1378d2ddc776SDavid Howells kdebug("AFS_VNODE_DELETED"); 1379d2ddc776SDavid Howells 1380d2ddc776SDavid Howells ret = afs_validate(vnode, key); 1381d2ddc776SDavid Howells if (ret == -ESTALE) 1382d2ddc776SDavid Howells ret = 0; 1383440fbc3aSDavid Howells } 1384d2ddc776SDavid Howells _debug("nlink %d [val %d]", vnode->vfs_inode.i_nlink, ret); 1385d2ddc776SDavid Howells } 1386d2ddc776SDavid Howells 1387d2ddc776SDavid Howells return ret; 1388d2ddc776SDavid Howells } 1389d2ddc776SDavid Howells 1390d2ddc776SDavid Howells /* 1391d2ddc776SDavid Howells * Remove a file or symlink from an AFS filesystem. 1392d2ddc776SDavid Howells */ 1393d2ddc776SDavid Howells static int afs_unlink(struct inode *dir, struct dentry *dentry) 1394d2ddc776SDavid Howells { 1395d2ddc776SDavid Howells struct afs_fs_cursor fc; 1396a58823acSDavid Howells struct afs_status_cb *scb; 139730062bd1SDavid Howells struct afs_vnode *dvnode = AFS_FS_I(dir), *vnode = NULL; 1398d2ddc776SDavid Howells struct key *key; 139979ddbfa5SDavid Howells bool need_rehash = false; 1400d2ddc776SDavid Howells int ret; 1401d2ddc776SDavid Howells 14023b6492dfSDavid Howells _enter("{%llx:%llu},{%pd}", 1403d2ddc776SDavid Howells dvnode->fid.vid, dvnode->fid.vnode, dentry); 1404d2ddc776SDavid Howells 1405d2ddc776SDavid Howells if (dentry->d_name.len >= AFSNAMEMAX) 1406d2ddc776SDavid Howells return -ENAMETOOLONG; 1407d2ddc776SDavid Howells 1408a58823acSDavid Howells ret = -ENOMEM; 1409a58823acSDavid Howells scb = kcalloc(2, sizeof(struct afs_status_cb), GFP_KERNEL); 1410a58823acSDavid Howells if (!scb) 1411a58823acSDavid Howells goto error; 1412a58823acSDavid Howells 1413d2ddc776SDavid Howells key = afs_request_key(dvnode->volume->cell); 1414d2ddc776SDavid Howells if (IS_ERR(key)) { 1415d2ddc776SDavid Howells ret = PTR_ERR(key); 1416a58823acSDavid Howells goto error_scb; 1417d2ddc776SDavid Howells } 1418d2ddc776SDavid Howells 1419d2ddc776SDavid Howells /* Try to make sure we have a callback promise on the victim. */ 1420d2ddc776SDavid Howells if (d_really_is_positive(dentry)) { 1421d2ddc776SDavid Howells vnode = AFS_FS_I(d_inode(dentry)); 1422d2ddc776SDavid Howells ret = afs_validate(vnode, key); 1423d2ddc776SDavid Howells if (ret < 0) 1424d2ddc776SDavid Howells goto error_key; 1425d2ddc776SDavid Howells } 1426d2ddc776SDavid Howells 142779ddbfa5SDavid Howells spin_lock(&dentry->d_lock); 142879ddbfa5SDavid Howells if (vnode && d_count(dentry) > 1) { 142979ddbfa5SDavid Howells spin_unlock(&dentry->d_lock); 143079ddbfa5SDavid Howells /* Start asynchronous writeout of the inode */ 143179ddbfa5SDavid Howells write_inode_now(d_inode(dentry), 0); 143279ddbfa5SDavid Howells ret = afs_sillyrename(dvnode, vnode, dentry, key); 143379ddbfa5SDavid Howells goto error_key; 143479ddbfa5SDavid Howells } 143579ddbfa5SDavid Howells if (!d_unhashed(dentry)) { 143679ddbfa5SDavid Howells /* Prevent a race with RCU lookup. */ 143779ddbfa5SDavid Howells __d_drop(dentry); 143879ddbfa5SDavid Howells need_rehash = true; 143979ddbfa5SDavid Howells } 144079ddbfa5SDavid Howells spin_unlock(&dentry->d_lock); 144179ddbfa5SDavid Howells 1442d2ddc776SDavid Howells ret = -ERESTARTSYS; 144320b8391fSDavid Howells if (afs_begin_vnode_operation(&fc, dvnode, key, true)) { 1444a58823acSDavid Howells afs_dataversion_t data_version = dvnode->status.data_version + 1; 1445a38a7558SDavid Howells afs_dataversion_t data_version_2 = vnode->status.data_version; 1446a58823acSDavid Howells 1447d2ddc776SDavid Howells while (afs_select_fileserver(&fc)) { 144868251f0aSDavid Howells fc.cb_break = afs_calc_vnode_cb_break(dvnode); 1449a38a7558SDavid Howells fc.cb_break_2 = afs_calc_vnode_cb_break(vnode); 145030062bd1SDavid Howells 145130062bd1SDavid Howells if (test_bit(AFS_SERVER_FL_IS_YFS, &fc.cbi->server->flags) && 145230062bd1SDavid Howells !test_bit(AFS_SERVER_FL_NO_RM2, &fc.cbi->server->flags)) { 145330062bd1SDavid Howells yfs_fs_remove_file2(&fc, vnode, dentry->d_name.name, 1454a58823acSDavid Howells &scb[0], &scb[1]); 145530062bd1SDavid Howells if (fc.ac.error != -ECONNABORTED || 145630062bd1SDavid Howells fc.ac.abort_code != RXGEN_OPCODE) 145730062bd1SDavid Howells continue; 145830062bd1SDavid Howells set_bit(AFS_SERVER_FL_NO_RM2, &fc.cbi->server->flags); 145930062bd1SDavid Howells } 146030062bd1SDavid Howells 1461a58823acSDavid Howells afs_fs_remove(&fc, vnode, dentry->d_name.name, false, &scb[0]); 1462d2ddc776SDavid Howells } 1463d2ddc776SDavid Howells 1464a58823acSDavid Howells afs_vnode_commit_status(&fc, dvnode, fc.cb_break, 1465a58823acSDavid Howells &data_version, &scb[0]); 1466a38a7558SDavid Howells afs_vnode_commit_status(&fc, vnode, fc.cb_break_2, 1467a38a7558SDavid Howells &data_version_2, &scb[1]); 1468d2ddc776SDavid Howells ret = afs_end_vnode_operation(&fc); 1469a38a7558SDavid Howells if (ret == 0 && !(scb[1].have_status || scb[1].have_error)) 1470a38a7558SDavid Howells ret = afs_dir_remove_link(dvnode, dentry, key); 147163a4681fSDavid Howells if (ret == 0 && 147263a4681fSDavid Howells test_bit(AFS_VNODE_DIR_VALID, &dvnode->flags)) 147363a4681fSDavid Howells afs_edit_dir_remove(dvnode, &dentry->d_name, 147463a4681fSDavid Howells afs_edit_dir_for_unlink); 1475d2ddc776SDavid Howells } 1476d2ddc776SDavid Howells 147779ddbfa5SDavid Howells if (need_rehash && ret < 0 && ret != -ENOENT) 147879ddbfa5SDavid Howells d_rehash(dentry); 147979ddbfa5SDavid Howells 1480d2ddc776SDavid Howells error_key: 1481260a9803SDavid Howells key_put(key); 1482a58823acSDavid Howells error_scb: 1483a58823acSDavid Howells kfree(scb); 1484260a9803SDavid Howells error: 1485260a9803SDavid Howells _leave(" = %d", ret); 1486260a9803SDavid Howells return ret; 1487260a9803SDavid Howells } 1488260a9803SDavid Howells 1489260a9803SDavid Howells /* 1490260a9803SDavid Howells * create a regular file on an AFS filesystem 1491260a9803SDavid Howells */ 14924acdaf27SAl Viro static int afs_create(struct inode *dir, struct dentry *dentry, umode_t mode, 1493ebfc3b49SAl Viro bool excl) 1494260a9803SDavid Howells { 1495b8359153SDavid Howells struct afs_iget_data iget_data; 1496d2ddc776SDavid Howells struct afs_fs_cursor fc; 1497a58823acSDavid Howells struct afs_status_cb *scb; 149843dd388bSColin Ian King struct afs_vnode *dvnode = AFS_FS_I(dir); 1499260a9803SDavid Howells struct key *key; 1500260a9803SDavid Howells int ret; 1501260a9803SDavid Howells 1502d2ddc776SDavid Howells mode |= S_IFREG; 1503260a9803SDavid Howells 15043b6492dfSDavid Howells _enter("{%llx:%llu},{%pd},%ho,", 1505a455589fSAl Viro dvnode->fid.vid, dvnode->fid.vnode, dentry, mode); 1506260a9803SDavid Howells 1507d2ddc776SDavid Howells ret = -ENAMETOOLONG; 1508d2ddc776SDavid Howells if (dentry->d_name.len >= AFSNAMEMAX) 1509d2ddc776SDavid Howells goto error; 1510d2ddc776SDavid Howells 1511260a9803SDavid Howells key = afs_request_key(dvnode->volume->cell); 1512260a9803SDavid Howells if (IS_ERR(key)) { 1513260a9803SDavid Howells ret = PTR_ERR(key); 1514260a9803SDavid Howells goto error; 1515260a9803SDavid Howells } 1516260a9803SDavid Howells 1517a58823acSDavid Howells ret = -ENOMEM; 1518a58823acSDavid Howells scb = kcalloc(2, sizeof(struct afs_status_cb), GFP_KERNEL); 1519a58823acSDavid Howells if (!scb) 1520a58823acSDavid Howells goto error_scb; 1521a58823acSDavid Howells 1522d2ddc776SDavid Howells ret = -ERESTARTSYS; 152320b8391fSDavid Howells if (afs_begin_vnode_operation(&fc, dvnode, key, true)) { 1524a58823acSDavid Howells afs_dataversion_t data_version = dvnode->status.data_version + 1; 1525a58823acSDavid Howells 1526d2ddc776SDavid Howells while (afs_select_fileserver(&fc)) { 152768251f0aSDavid Howells fc.cb_break = afs_calc_vnode_cb_break(dvnode); 1528b8359153SDavid Howells afs_prep_for_new_inode(&fc, &iget_data); 1529a58823acSDavid Howells afs_fs_create(&fc, dentry->d_name.name, mode, 1530b8359153SDavid Howells &scb[0], &iget_data.fid, &scb[1]); 1531d2ddc776SDavid Howells } 1532d2ddc776SDavid Howells 1533a58823acSDavid Howells afs_check_for_remote_deletion(&fc, dvnode); 1534a58823acSDavid Howells afs_vnode_commit_status(&fc, dvnode, fc.cb_break, 1535a58823acSDavid Howells &data_version, &scb[0]); 1536b8359153SDavid Howells afs_vnode_new_inode(&fc, dentry, &iget_data, &scb[1]); 1537d2ddc776SDavid Howells ret = afs_end_vnode_operation(&fc); 1538260a9803SDavid Howells if (ret < 0) 1539d2ddc776SDavid Howells goto error_key; 15404433b691SDavid Howells } else { 15414433b691SDavid Howells goto error_key; 1542260a9803SDavid Howells } 1543260a9803SDavid Howells 154463a4681fSDavid Howells if (test_bit(AFS_VNODE_DIR_VALID, &dvnode->flags)) 1545b8359153SDavid Howells afs_edit_dir_add(dvnode, &dentry->d_name, &iget_data.fid, 154663a4681fSDavid Howells afs_edit_dir_for_create); 154763a4681fSDavid Howells 1548a58823acSDavid Howells kfree(scb); 1549260a9803SDavid Howells key_put(key); 1550260a9803SDavid Howells _leave(" = 0"); 1551260a9803SDavid Howells return 0; 1552260a9803SDavid Howells 1553a58823acSDavid Howells error_scb: 1554a58823acSDavid Howells kfree(scb); 1555d2ddc776SDavid Howells error_key: 1556260a9803SDavid Howells key_put(key); 1557260a9803SDavid Howells error: 1558260a9803SDavid Howells d_drop(dentry); 1559260a9803SDavid Howells _leave(" = %d", ret); 1560260a9803SDavid Howells return ret; 1561260a9803SDavid Howells } 1562260a9803SDavid Howells 1563260a9803SDavid Howells /* 1564260a9803SDavid Howells * create a hard link between files in an AFS filesystem 1565260a9803SDavid Howells */ 1566260a9803SDavid Howells static int afs_link(struct dentry *from, struct inode *dir, 1567260a9803SDavid Howells struct dentry *dentry) 1568260a9803SDavid Howells { 1569d2ddc776SDavid Howells struct afs_fs_cursor fc; 1570a58823acSDavid Howells struct afs_status_cb *scb; 1571a58823acSDavid Howells struct afs_vnode *dvnode = AFS_FS_I(dir); 1572a58823acSDavid Howells struct afs_vnode *vnode = AFS_FS_I(d_inode(from)); 1573260a9803SDavid Howells struct key *key; 1574260a9803SDavid Howells int ret; 1575260a9803SDavid Howells 15763b6492dfSDavid Howells _enter("{%llx:%llu},{%llx:%llu},{%pd}", 1577260a9803SDavid Howells vnode->fid.vid, vnode->fid.vnode, 1578260a9803SDavid Howells dvnode->fid.vid, dvnode->fid.vnode, 1579a455589fSAl Viro dentry); 1580260a9803SDavid Howells 1581d2ddc776SDavid Howells ret = -ENAMETOOLONG; 1582d2ddc776SDavid Howells if (dentry->d_name.len >= AFSNAMEMAX) 1583d2ddc776SDavid Howells goto error; 1584d2ddc776SDavid Howells 1585a58823acSDavid Howells ret = -ENOMEM; 1586a58823acSDavid Howells scb = kcalloc(2, sizeof(struct afs_status_cb), GFP_KERNEL); 1587a58823acSDavid Howells if (!scb) 1588a58823acSDavid Howells goto error; 1589a58823acSDavid Howells 1590260a9803SDavid Howells key = afs_request_key(dvnode->volume->cell); 1591260a9803SDavid Howells if (IS_ERR(key)) { 1592260a9803SDavid Howells ret = PTR_ERR(key); 1593a58823acSDavid Howells goto error_scb; 1594260a9803SDavid Howells } 1595260a9803SDavid Howells 1596d2ddc776SDavid Howells ret = -ERESTARTSYS; 159720b8391fSDavid Howells if (afs_begin_vnode_operation(&fc, dvnode, key, true)) { 1598a58823acSDavid Howells afs_dataversion_t data_version = dvnode->status.data_version + 1; 1599a58823acSDavid Howells 1600d2ddc776SDavid Howells if (mutex_lock_interruptible_nested(&vnode->io_lock, 1) < 0) { 1601d2ddc776SDavid Howells afs_end_vnode_operation(&fc); 1602bc1527dcSDavid Howells goto error_key; 1603d2ddc776SDavid Howells } 1604260a9803SDavid Howells 1605d2ddc776SDavid Howells while (afs_select_fileserver(&fc)) { 160668251f0aSDavid Howells fc.cb_break = afs_calc_vnode_cb_break(dvnode); 160768251f0aSDavid Howells fc.cb_break_2 = afs_calc_vnode_cb_break(vnode); 1608a58823acSDavid Howells afs_fs_link(&fc, vnode, dentry->d_name.name, 1609a58823acSDavid Howells &scb[0], &scb[1]); 1610d2ddc776SDavid Howells } 1611d2ddc776SDavid Howells 1612a58823acSDavid Howells afs_vnode_commit_status(&fc, dvnode, fc.cb_break, 1613a58823acSDavid Howells &data_version, &scb[0]); 1614a58823acSDavid Howells afs_vnode_commit_status(&fc, vnode, fc.cb_break_2, 1615a58823acSDavid Howells NULL, &scb[1]); 16167de9c6eeSAl Viro ihold(&vnode->vfs_inode); 1617260a9803SDavid Howells d_instantiate(dentry, &vnode->vfs_inode); 1618d2ddc776SDavid Howells 1619d2ddc776SDavid Howells mutex_unlock(&vnode->io_lock); 1620d2ddc776SDavid Howells ret = afs_end_vnode_operation(&fc); 1621d2ddc776SDavid Howells if (ret < 0) 1622d2ddc776SDavid Howells goto error_key; 16234433b691SDavid Howells } else { 16244433b691SDavid Howells goto error_key; 1625d2ddc776SDavid Howells } 1626d2ddc776SDavid Howells 162763a4681fSDavid Howells if (test_bit(AFS_VNODE_DIR_VALID, &dvnode->flags)) 162863a4681fSDavid Howells afs_edit_dir_add(dvnode, &dentry->d_name, &vnode->fid, 162963a4681fSDavid Howells afs_edit_dir_for_link); 163063a4681fSDavid Howells 1631260a9803SDavid Howells key_put(key); 1632a58823acSDavid Howells kfree(scb); 1633260a9803SDavid Howells _leave(" = 0"); 1634260a9803SDavid Howells return 0; 1635260a9803SDavid Howells 1636d2ddc776SDavid Howells error_key: 1637260a9803SDavid Howells key_put(key); 1638a58823acSDavid Howells error_scb: 1639a58823acSDavid Howells kfree(scb); 1640260a9803SDavid Howells error: 1641260a9803SDavid Howells d_drop(dentry); 1642260a9803SDavid Howells _leave(" = %d", ret); 1643260a9803SDavid Howells return ret; 1644260a9803SDavid Howells } 1645260a9803SDavid Howells 1646260a9803SDavid Howells /* 1647260a9803SDavid Howells * create a symlink in an AFS filesystem 1648260a9803SDavid Howells */ 1649260a9803SDavid Howells static int afs_symlink(struct inode *dir, struct dentry *dentry, 1650260a9803SDavid Howells const char *content) 1651260a9803SDavid Howells { 1652b8359153SDavid Howells struct afs_iget_data iget_data; 1653d2ddc776SDavid Howells struct afs_fs_cursor fc; 1654a58823acSDavid Howells struct afs_status_cb *scb; 1655d2ddc776SDavid Howells struct afs_vnode *dvnode = AFS_FS_I(dir); 1656260a9803SDavid Howells struct key *key; 1657260a9803SDavid Howells int ret; 1658260a9803SDavid Howells 16593b6492dfSDavid Howells _enter("{%llx:%llu},{%pd},%s", 1660a455589fSAl Viro dvnode->fid.vid, dvnode->fid.vnode, dentry, 1661260a9803SDavid Howells content); 1662260a9803SDavid Howells 1663d2ddc776SDavid Howells ret = -ENAMETOOLONG; 1664d2ddc776SDavid Howells if (dentry->d_name.len >= AFSNAMEMAX) 1665d2ddc776SDavid Howells goto error; 1666d2ddc776SDavid Howells 1667260a9803SDavid Howells ret = -EINVAL; 166845222b9eSDavid Howells if (strlen(content) >= AFSPATHMAX) 1669260a9803SDavid Howells goto error; 1670260a9803SDavid Howells 1671a58823acSDavid Howells ret = -ENOMEM; 1672a58823acSDavid Howells scb = kcalloc(2, sizeof(struct afs_status_cb), GFP_KERNEL); 1673a58823acSDavid Howells if (!scb) 1674a58823acSDavid Howells goto error; 1675a58823acSDavid Howells 1676260a9803SDavid Howells key = afs_request_key(dvnode->volume->cell); 1677260a9803SDavid Howells if (IS_ERR(key)) { 1678260a9803SDavid Howells ret = PTR_ERR(key); 1679a58823acSDavid Howells goto error_scb; 1680260a9803SDavid Howells } 1681260a9803SDavid Howells 1682d2ddc776SDavid Howells ret = -ERESTARTSYS; 168320b8391fSDavid Howells if (afs_begin_vnode_operation(&fc, dvnode, key, true)) { 1684a58823acSDavid Howells afs_dataversion_t data_version = dvnode->status.data_version + 1; 1685a58823acSDavid Howells 1686d2ddc776SDavid Howells while (afs_select_fileserver(&fc)) { 168768251f0aSDavid Howells fc.cb_break = afs_calc_vnode_cb_break(dvnode); 1688b8359153SDavid Howells afs_prep_for_new_inode(&fc, &iget_data); 1689a58823acSDavid Howells afs_fs_symlink(&fc, dentry->d_name.name, content, 1690b8359153SDavid Howells &scb[0], &iget_data.fid, &scb[1]); 1691d2ddc776SDavid Howells } 1692d2ddc776SDavid Howells 1693a58823acSDavid Howells afs_check_for_remote_deletion(&fc, dvnode); 1694a58823acSDavid Howells afs_vnode_commit_status(&fc, dvnode, fc.cb_break, 1695a58823acSDavid Howells &data_version, &scb[0]); 1696b8359153SDavid Howells afs_vnode_new_inode(&fc, dentry, &iget_data, &scb[1]); 1697d2ddc776SDavid Howells ret = afs_end_vnode_operation(&fc); 1698260a9803SDavid Howells if (ret < 0) 1699d2ddc776SDavid Howells goto error_key; 17004433b691SDavid Howells } else { 17014433b691SDavid Howells goto error_key; 1702260a9803SDavid Howells } 1703260a9803SDavid Howells 170463a4681fSDavid Howells if (test_bit(AFS_VNODE_DIR_VALID, &dvnode->flags)) 1705b8359153SDavid Howells afs_edit_dir_add(dvnode, &dentry->d_name, &iget_data.fid, 170663a4681fSDavid Howells afs_edit_dir_for_symlink); 170763a4681fSDavid Howells 1708260a9803SDavid Howells key_put(key); 1709a58823acSDavid Howells kfree(scb); 1710260a9803SDavid Howells _leave(" = 0"); 1711260a9803SDavid Howells return 0; 1712260a9803SDavid Howells 1713d2ddc776SDavid Howells error_key: 1714260a9803SDavid Howells key_put(key); 1715a58823acSDavid Howells error_scb: 1716a58823acSDavid Howells kfree(scb); 1717260a9803SDavid Howells error: 1718260a9803SDavid Howells d_drop(dentry); 1719260a9803SDavid Howells _leave(" = %d", ret); 1720260a9803SDavid Howells return ret; 1721260a9803SDavid Howells } 1722260a9803SDavid Howells 1723260a9803SDavid Howells /* 1724260a9803SDavid Howells * rename a file in an AFS filesystem and/or move it between directories 1725260a9803SDavid Howells */ 1726260a9803SDavid Howells static int afs_rename(struct inode *old_dir, struct dentry *old_dentry, 17271cd66c93SMiklos Szeredi struct inode *new_dir, struct dentry *new_dentry, 17281cd66c93SMiklos Szeredi unsigned int flags) 1729260a9803SDavid Howells { 1730d2ddc776SDavid Howells struct afs_fs_cursor fc; 1731a58823acSDavid Howells struct afs_status_cb *scb; 1732260a9803SDavid Howells struct afs_vnode *orig_dvnode, *new_dvnode, *vnode; 173379ddbfa5SDavid Howells struct dentry *tmp = NULL, *rehash = NULL; 173479ddbfa5SDavid Howells struct inode *new_inode; 1735260a9803SDavid Howells struct key *key; 173663a4681fSDavid Howells bool new_negative = d_is_negative(new_dentry); 1737260a9803SDavid Howells int ret; 1738260a9803SDavid Howells 17391cd66c93SMiklos Szeredi if (flags) 17401cd66c93SMiklos Szeredi return -EINVAL; 17411cd66c93SMiklos Szeredi 174279ddbfa5SDavid Howells /* Don't allow silly-rename files be moved around. */ 174379ddbfa5SDavid Howells if (old_dentry->d_flags & DCACHE_NFSFS_RENAMED) 174479ddbfa5SDavid Howells return -EINVAL; 174579ddbfa5SDavid Howells 17462b0143b5SDavid Howells vnode = AFS_FS_I(d_inode(old_dentry)); 1747260a9803SDavid Howells orig_dvnode = AFS_FS_I(old_dir); 1748260a9803SDavid Howells new_dvnode = AFS_FS_I(new_dir); 1749260a9803SDavid Howells 17503b6492dfSDavid Howells _enter("{%llx:%llu},{%llx:%llu},{%llx:%llu},{%pd}", 1751260a9803SDavid Howells orig_dvnode->fid.vid, orig_dvnode->fid.vnode, 1752260a9803SDavid Howells vnode->fid.vid, vnode->fid.vnode, 1753260a9803SDavid Howells new_dvnode->fid.vid, new_dvnode->fid.vnode, 1754a455589fSAl Viro new_dentry); 1755260a9803SDavid Howells 1756a58823acSDavid Howells ret = -ENOMEM; 1757a58823acSDavid Howells scb = kcalloc(2, sizeof(struct afs_status_cb), GFP_KERNEL); 1758a58823acSDavid Howells if (!scb) 1759a58823acSDavid Howells goto error; 1760a58823acSDavid Howells 1761260a9803SDavid Howells key = afs_request_key(orig_dvnode->volume->cell); 1762260a9803SDavid Howells if (IS_ERR(key)) { 1763260a9803SDavid Howells ret = PTR_ERR(key); 1764a58823acSDavid Howells goto error_scb; 1765260a9803SDavid Howells } 1766260a9803SDavid Howells 176779ddbfa5SDavid Howells /* For non-directories, check whether the target is busy and if so, 176879ddbfa5SDavid Howells * make a copy of the dentry and then do a silly-rename. If the 176979ddbfa5SDavid Howells * silly-rename succeeds, the copied dentry is hashed and becomes the 177079ddbfa5SDavid Howells * new target. 177179ddbfa5SDavid Howells */ 177279ddbfa5SDavid Howells if (d_is_positive(new_dentry) && !d_is_dir(new_dentry)) { 177379ddbfa5SDavid Howells /* To prevent any new references to the target during the 177479ddbfa5SDavid Howells * rename, we unhash the dentry in advance. 177579ddbfa5SDavid Howells */ 177679ddbfa5SDavid Howells if (!d_unhashed(new_dentry)) { 177779ddbfa5SDavid Howells d_drop(new_dentry); 177879ddbfa5SDavid Howells rehash = new_dentry; 177979ddbfa5SDavid Howells } 178079ddbfa5SDavid Howells 178179ddbfa5SDavid Howells if (d_count(new_dentry) > 2) { 178279ddbfa5SDavid Howells /* copy the target dentry's name */ 178379ddbfa5SDavid Howells ret = -ENOMEM; 178479ddbfa5SDavid Howells tmp = d_alloc(new_dentry->d_parent, 178579ddbfa5SDavid Howells &new_dentry->d_name); 178679ddbfa5SDavid Howells if (!tmp) 178779ddbfa5SDavid Howells goto error_rehash; 178879ddbfa5SDavid Howells 178979ddbfa5SDavid Howells ret = afs_sillyrename(new_dvnode, 179079ddbfa5SDavid Howells AFS_FS_I(d_inode(new_dentry)), 179179ddbfa5SDavid Howells new_dentry, key); 179279ddbfa5SDavid Howells if (ret) 179379ddbfa5SDavid Howells goto error_rehash; 179479ddbfa5SDavid Howells 179579ddbfa5SDavid Howells new_dentry = tmp; 179679ddbfa5SDavid Howells rehash = NULL; 179779ddbfa5SDavid Howells new_negative = true; 179879ddbfa5SDavid Howells } 179979ddbfa5SDavid Howells } 180079ddbfa5SDavid Howells 1801d2ddc776SDavid Howells ret = -ERESTARTSYS; 180220b8391fSDavid Howells if (afs_begin_vnode_operation(&fc, orig_dvnode, key, true)) { 1803a58823acSDavid Howells afs_dataversion_t orig_data_version; 1804a58823acSDavid Howells afs_dataversion_t new_data_version; 1805a58823acSDavid Howells struct afs_status_cb *new_scb = &scb[1]; 1806a58823acSDavid Howells 1807a58823acSDavid Howells orig_data_version = orig_dvnode->status.data_version + 1; 1808a58823acSDavid Howells 1809d2ddc776SDavid Howells if (orig_dvnode != new_dvnode) { 1810d2ddc776SDavid Howells if (mutex_lock_interruptible_nested(&new_dvnode->io_lock, 1) < 0) { 1811d2ddc776SDavid Howells afs_end_vnode_operation(&fc); 181279ddbfa5SDavid Howells goto error_rehash; 1813d2ddc776SDavid Howells } 1814a58823acSDavid Howells new_data_version = new_dvnode->status.data_version; 1815a58823acSDavid Howells } else { 1816a58823acSDavid Howells new_data_version = orig_data_version; 1817a58823acSDavid Howells new_scb = &scb[0]; 1818d2ddc776SDavid Howells } 1819a58823acSDavid Howells 1820d2ddc776SDavid Howells while (afs_select_fileserver(&fc)) { 182168251f0aSDavid Howells fc.cb_break = afs_calc_vnode_cb_break(orig_dvnode); 182268251f0aSDavid Howells fc.cb_break_2 = afs_calc_vnode_cb_break(new_dvnode); 1823d2ddc776SDavid Howells afs_fs_rename(&fc, old_dentry->d_name.name, 182463a4681fSDavid Howells new_dvnode, new_dentry->d_name.name, 1825a58823acSDavid Howells &scb[0], new_scb); 1826d2ddc776SDavid Howells } 1827d2ddc776SDavid Howells 1828a58823acSDavid Howells afs_vnode_commit_status(&fc, orig_dvnode, fc.cb_break, 1829a58823acSDavid Howells &orig_data_version, &scb[0]); 1830a58823acSDavid Howells if (new_dvnode != orig_dvnode) { 1831a58823acSDavid Howells afs_vnode_commit_status(&fc, new_dvnode, fc.cb_break_2, 1832a58823acSDavid Howells &new_data_version, &scb[1]); 1833d2ddc776SDavid Howells mutex_unlock(&new_dvnode->io_lock); 1834a58823acSDavid Howells } 1835d2ddc776SDavid Howells ret = afs_end_vnode_operation(&fc); 1836260a9803SDavid Howells if (ret < 0) 183779ddbfa5SDavid Howells goto error_rehash; 1838d2ddc776SDavid Howells } 1839d2ddc776SDavid Howells 184063a4681fSDavid Howells if (ret == 0) { 184179ddbfa5SDavid Howells if (rehash) 184279ddbfa5SDavid Howells d_rehash(rehash); 184363a4681fSDavid Howells if (test_bit(AFS_VNODE_DIR_VALID, &orig_dvnode->flags)) 184463a4681fSDavid Howells afs_edit_dir_remove(orig_dvnode, &old_dentry->d_name, 184579ddbfa5SDavid Howells afs_edit_dir_for_rename_0); 184663a4681fSDavid Howells 184763a4681fSDavid Howells if (!new_negative && 184863a4681fSDavid Howells test_bit(AFS_VNODE_DIR_VALID, &new_dvnode->flags)) 184963a4681fSDavid Howells afs_edit_dir_remove(new_dvnode, &new_dentry->d_name, 185079ddbfa5SDavid Howells afs_edit_dir_for_rename_1); 185163a4681fSDavid Howells 185263a4681fSDavid Howells if (test_bit(AFS_VNODE_DIR_VALID, &new_dvnode->flags)) 185363a4681fSDavid Howells afs_edit_dir_add(new_dvnode, &new_dentry->d_name, 185479ddbfa5SDavid Howells &vnode->fid, afs_edit_dir_for_rename_2); 185579ddbfa5SDavid Howells 185679ddbfa5SDavid Howells new_inode = d_inode(new_dentry); 185779ddbfa5SDavid Howells if (new_inode) { 185879ddbfa5SDavid Howells spin_lock(&new_inode->i_lock); 185979ddbfa5SDavid Howells if (new_inode->i_nlink > 0) 186079ddbfa5SDavid Howells drop_nlink(new_inode); 186179ddbfa5SDavid Howells spin_unlock(&new_inode->i_lock); 186279ddbfa5SDavid Howells } 186379ddbfa5SDavid Howells d_move(old_dentry, new_dentry); 186479ddbfa5SDavid Howells goto error_tmp; 186563a4681fSDavid Howells } 186663a4681fSDavid Howells 186779ddbfa5SDavid Howells error_rehash: 186879ddbfa5SDavid Howells if (rehash) 186979ddbfa5SDavid Howells d_rehash(rehash); 187079ddbfa5SDavid Howells error_tmp: 187179ddbfa5SDavid Howells if (tmp) 187279ddbfa5SDavid Howells dput(tmp); 1873260a9803SDavid Howells key_put(key); 1874a58823acSDavid Howells error_scb: 1875a58823acSDavid Howells kfree(scb); 1876260a9803SDavid Howells error: 1877260a9803SDavid Howells _leave(" = %d", ret); 1878260a9803SDavid Howells return ret; 1879260a9803SDavid Howells } 1880f3ddee8dSDavid Howells 1881f3ddee8dSDavid Howells /* 1882f3ddee8dSDavid Howells * Release a directory page and clean up its private state if it's not busy 1883f3ddee8dSDavid Howells * - return true if the page can now be released, false if not 1884f3ddee8dSDavid Howells */ 1885f3ddee8dSDavid Howells static int afs_dir_releasepage(struct page *page, gfp_t gfp_flags) 1886f3ddee8dSDavid Howells { 1887f3ddee8dSDavid Howells struct afs_vnode *dvnode = AFS_FS_I(page->mapping->host); 1888f3ddee8dSDavid Howells 18893b6492dfSDavid Howells _enter("{{%llx:%llu}[%lu]}", dvnode->fid.vid, dvnode->fid.vnode, page->index); 1890f3ddee8dSDavid Howells 1891f3ddee8dSDavid Howells set_page_private(page, 0); 1892f3ddee8dSDavid Howells ClearPagePrivate(page); 1893f3ddee8dSDavid Howells 1894f3ddee8dSDavid Howells /* The directory will need reloading. */ 1895f3ddee8dSDavid Howells if (test_and_clear_bit(AFS_VNODE_DIR_VALID, &dvnode->flags)) 1896f3ddee8dSDavid Howells afs_stat_v(dvnode, n_relpg); 1897f3ddee8dSDavid Howells return 1; 1898f3ddee8dSDavid Howells } 1899f3ddee8dSDavid Howells 1900f3ddee8dSDavid Howells /* 1901f3ddee8dSDavid Howells * invalidate part or all of a page 1902f3ddee8dSDavid Howells * - release a page and clean up its private data if offset is 0 (indicating 1903f3ddee8dSDavid Howells * the entire page) 1904f3ddee8dSDavid Howells */ 1905f3ddee8dSDavid Howells static void afs_dir_invalidatepage(struct page *page, unsigned int offset, 1906f3ddee8dSDavid Howells unsigned int length) 1907f3ddee8dSDavid Howells { 1908f3ddee8dSDavid Howells struct afs_vnode *dvnode = AFS_FS_I(page->mapping->host); 1909f3ddee8dSDavid Howells 1910f3ddee8dSDavid Howells _enter("{%lu},%u,%u", page->index, offset, length); 1911f3ddee8dSDavid Howells 1912f3ddee8dSDavid Howells BUG_ON(!PageLocked(page)); 1913f3ddee8dSDavid Howells 1914f3ddee8dSDavid Howells /* The directory will need reloading. */ 1915f3ddee8dSDavid Howells if (test_and_clear_bit(AFS_VNODE_DIR_VALID, &dvnode->flags)) 1916f3ddee8dSDavid Howells afs_stat_v(dvnode, n_inval); 1917f3ddee8dSDavid Howells 1918f3ddee8dSDavid Howells /* we clean up only if the entire page is being invalidated */ 1919f3ddee8dSDavid Howells if (offset == 0 && length == PAGE_SIZE) { 1920f3ddee8dSDavid Howells set_page_private(page, 0); 1921f3ddee8dSDavid Howells ClearPagePrivate(page); 1922f3ddee8dSDavid Howells } 1923f3ddee8dSDavid Howells } 1924