11da177e4SLinus Torvalds /* dir.c: AFS filesystem directory handling 21da177e4SLinus Torvalds * 3f3ddee8dSDavid Howells * Copyright (C) 2002, 2018 Red Hat, Inc. All Rights Reserved. 41da177e4SLinus Torvalds * Written by David Howells (dhowells@redhat.com) 51da177e4SLinus Torvalds * 61da177e4SLinus Torvalds * This program is free software; you can redistribute it and/or 71da177e4SLinus Torvalds * modify it under the terms of the GNU General Public License 81da177e4SLinus Torvalds * as published by the Free Software Foundation; either version 91da177e4SLinus Torvalds * 2 of the License, or (at your option) any later version. 101da177e4SLinus Torvalds */ 111da177e4SLinus Torvalds 121da177e4SLinus Torvalds #include <linux/kernel.h> 131da177e4SLinus Torvalds #include <linux/fs.h> 1434286d66SNick Piggin #include <linux/namei.h> 151da177e4SLinus Torvalds #include <linux/pagemap.h> 16f3ddee8dSDavid Howells #include <linux/swap.h> 1700d3b7a4SDavid Howells #include <linux/ctype.h> 18e8edc6e0SAlexey Dobriyan #include <linux/sched.h> 19f3ddee8dSDavid Howells #include <linux/task_io_accounting_ops.h> 201da177e4SLinus Torvalds #include "internal.h" 214ea219a8SDavid Howells #include "xdr_fs.h" 221da177e4SLinus Torvalds 23260a9803SDavid Howells static struct dentry *afs_lookup(struct inode *dir, struct dentry *dentry, 2400cd8dd3SAl Viro unsigned int flags); 251da177e4SLinus Torvalds static int afs_dir_open(struct inode *inode, struct file *file); 261bbae9f8SAl Viro static int afs_readdir(struct file *file, struct dir_context *ctx); 270b728e19SAl Viro static int afs_d_revalidate(struct dentry *dentry, unsigned int flags); 28fe15ce44SNick Piggin static int afs_d_delete(const struct dentry *dentry); 295cf9dd55SDavid Howells static int afs_lookup_one_filldir(struct dir_context *ctx, const char *name, int nlen, 305cf9dd55SDavid Howells loff_t fpos, u64 ino, unsigned dtype); 31ac7576f4SMiklos Szeredi static int afs_lookup_filldir(struct dir_context *ctx, const char *name, int nlen, 32afefdbb2SDavid Howells loff_t fpos, u64 ino, unsigned dtype); 334acdaf27SAl Viro static int afs_create(struct inode *dir, struct dentry *dentry, umode_t mode, 34ebfc3b49SAl Viro bool excl); 3518bb1db3SAl Viro static int afs_mkdir(struct inode *dir, struct dentry *dentry, umode_t mode); 36260a9803SDavid Howells static int afs_rmdir(struct inode *dir, struct dentry *dentry); 37260a9803SDavid Howells static int afs_unlink(struct inode *dir, struct dentry *dentry); 38260a9803SDavid Howells static int afs_link(struct dentry *from, struct inode *dir, 39260a9803SDavid Howells struct dentry *dentry); 40260a9803SDavid Howells static int afs_symlink(struct inode *dir, struct dentry *dentry, 41260a9803SDavid Howells const char *content); 42260a9803SDavid Howells static int afs_rename(struct inode *old_dir, struct dentry *old_dentry, 431cd66c93SMiklos Szeredi struct inode *new_dir, struct dentry *new_dentry, 441cd66c93SMiklos Szeredi unsigned int flags); 45f3ddee8dSDavid Howells static int afs_dir_releasepage(struct page *page, gfp_t gfp_flags); 46f3ddee8dSDavid Howells static void afs_dir_invalidatepage(struct page *page, unsigned int offset, 47f3ddee8dSDavid Howells unsigned int length); 48f3ddee8dSDavid Howells 49f3ddee8dSDavid Howells static int afs_dir_set_page_dirty(struct page *page) 50f3ddee8dSDavid Howells { 51f3ddee8dSDavid Howells BUG(); /* This should never happen. */ 52f3ddee8dSDavid Howells } 531da177e4SLinus Torvalds 544b6f5d20SArjan van de Ven const struct file_operations afs_dir_file_operations = { 551da177e4SLinus Torvalds .open = afs_dir_open, 5600d3b7a4SDavid Howells .release = afs_release, 5729884effSAl Viro .iterate_shared = afs_readdir, 58e8d6c554SDavid Howells .lock = afs_lock, 593222a3e5SChristoph Hellwig .llseek = generic_file_llseek, 601da177e4SLinus Torvalds }; 611da177e4SLinus Torvalds 62754661f1SArjan van de Ven const struct inode_operations afs_dir_inode_operations = { 63260a9803SDavid Howells .create = afs_create, 64260a9803SDavid Howells .lookup = afs_lookup, 65260a9803SDavid Howells .link = afs_link, 66260a9803SDavid Howells .unlink = afs_unlink, 67260a9803SDavid Howells .symlink = afs_symlink, 68260a9803SDavid Howells .mkdir = afs_mkdir, 69260a9803SDavid Howells .rmdir = afs_rmdir, 702773bf00SMiklos Szeredi .rename = afs_rename, 7100d3b7a4SDavid Howells .permission = afs_permission, 72416351f2SDavid Howells .getattr = afs_getattr, 7331143d5dSDavid Howells .setattr = afs_setattr, 74d3e3b7eaSDavid Howells .listxattr = afs_listxattr, 751da177e4SLinus Torvalds }; 761da177e4SLinus Torvalds 77f3ddee8dSDavid Howells const struct address_space_operations afs_dir_aops = { 78f3ddee8dSDavid Howells .set_page_dirty = afs_dir_set_page_dirty, 79f3ddee8dSDavid Howells .releasepage = afs_dir_releasepage, 80f3ddee8dSDavid Howells .invalidatepage = afs_dir_invalidatepage, 81f3ddee8dSDavid Howells }; 82f3ddee8dSDavid Howells 83d61dcce2SAl Viro const struct dentry_operations afs_fs_dentry_operations = { 841da177e4SLinus Torvalds .d_revalidate = afs_d_revalidate, 851da177e4SLinus Torvalds .d_delete = afs_d_delete, 86260a9803SDavid Howells .d_release = afs_d_release, 87d18610b0SDavid Howells .d_automount = afs_d_automount, 881da177e4SLinus Torvalds }; 891da177e4SLinus Torvalds 905cf9dd55SDavid Howells struct afs_lookup_one_cookie { 915cf9dd55SDavid Howells struct dir_context ctx; 925cf9dd55SDavid Howells struct qstr name; 935cf9dd55SDavid Howells bool found; 945cf9dd55SDavid Howells struct afs_fid fid; 955cf9dd55SDavid Howells }; 965cf9dd55SDavid Howells 97260a9803SDavid Howells struct afs_lookup_cookie { 981bbae9f8SAl Viro struct dir_context ctx; 991bbae9f8SAl Viro struct qstr name; 1005cf9dd55SDavid Howells bool found; 1015cf9dd55SDavid Howells bool one_only; 1025cf9dd55SDavid Howells unsigned short nr_fids; 1035cf9dd55SDavid Howells struct afs_file_status *statuses; 1045cf9dd55SDavid Howells struct afs_callback *callbacks; 1055cf9dd55SDavid Howells struct afs_fid fids[50]; 1061da177e4SLinus Torvalds }; 1071da177e4SLinus Torvalds 1081da177e4SLinus Torvalds /* 1091da177e4SLinus Torvalds * check that a directory page is valid 1101da177e4SLinus Torvalds */ 111f3ddee8dSDavid Howells static bool afs_dir_check_page(struct afs_vnode *dvnode, struct page *page, 112f3ddee8dSDavid Howells loff_t i_size) 1131da177e4SLinus Torvalds { 11400317636SDavid Howells struct afs_xdr_dir_page *dbuf; 115f3ddee8dSDavid Howells loff_t latter, off; 1161da177e4SLinus Torvalds int tmp, qty; 1171da177e4SLinus Torvalds 118dab17c1aSDavid Howells /* Determine how many magic numbers there should be in this page, but 119dab17c1aSDavid Howells * we must take care because the directory may change size under us. 120dab17c1aSDavid Howells */ 121dab17c1aSDavid Howells off = page_offset(page); 122dab17c1aSDavid Howells if (i_size <= off) 123dab17c1aSDavid Howells goto checked; 124dab17c1aSDavid Howells 125dab17c1aSDavid Howells latter = i_size - off; 1261da177e4SLinus Torvalds if (latter >= PAGE_SIZE) 1271da177e4SLinus Torvalds qty = PAGE_SIZE; 1281da177e4SLinus Torvalds else 1291da177e4SLinus Torvalds qty = latter; 13000317636SDavid Howells qty /= sizeof(union afs_xdr_dir_block); 1311da177e4SLinus Torvalds 1321da177e4SLinus Torvalds /* check them */ 13363a4681fSDavid Howells dbuf = kmap(page); 1341da177e4SLinus Torvalds for (tmp = 0; tmp < qty; tmp++) { 13500317636SDavid Howells if (dbuf->blocks[tmp].hdr.magic != AFS_DIR_MAGIC) { 136dab17c1aSDavid Howells printk("kAFS: %s(%lx): bad magic %d/%d is %04hx\n", 137f3ddee8dSDavid Howells __func__, dvnode->vfs_inode.i_ino, tmp, qty, 13800317636SDavid Howells ntohs(dbuf->blocks[tmp].hdr.magic)); 139f3ddee8dSDavid Howells trace_afs_dir_check_failed(dvnode, off, i_size); 14063a4681fSDavid Howells kunmap(page); 141f51375cdSDavid Howells trace_afs_file_error(dvnode, -EIO, afs_file_error_dir_bad_magic); 1421da177e4SLinus Torvalds goto error; 1431da177e4SLinus Torvalds } 14463a4681fSDavid Howells 14563a4681fSDavid Howells /* Make sure each block is NUL terminated so we can reasonably 14663a4681fSDavid Howells * use string functions on it. The filenames in the page 14763a4681fSDavid Howells * *should* be NUL-terminated anyway. 14863a4681fSDavid Howells */ 14963a4681fSDavid Howells ((u8 *)&dbuf->blocks[tmp])[AFS_DIR_BLOCK_SIZE - 1] = 0; 1501da177e4SLinus Torvalds } 1511da177e4SLinus Torvalds 15263a4681fSDavid Howells kunmap(page); 15363a4681fSDavid Howells 154dab17c1aSDavid Howells checked: 155f3ddee8dSDavid Howells afs_stat_v(dvnode, n_read_dir); 156be5b82dbSAl Viro return true; 1571da177e4SLinus Torvalds 1581da177e4SLinus Torvalds error: 159be5b82dbSAl Viro return false; 160ec26815aSDavid Howells } 1611da177e4SLinus Torvalds 1621da177e4SLinus Torvalds /* 1631da177e4SLinus Torvalds * open an AFS directory file 1641da177e4SLinus Torvalds */ 1651da177e4SLinus Torvalds static int afs_dir_open(struct inode *inode, struct file *file) 1661da177e4SLinus Torvalds { 1671da177e4SLinus Torvalds _enter("{%lu}", inode->i_ino); 1681da177e4SLinus Torvalds 16900317636SDavid Howells BUILD_BUG_ON(sizeof(union afs_xdr_dir_block) != 2048); 17000317636SDavid Howells BUILD_BUG_ON(sizeof(union afs_xdr_dirent) != 32); 1711da177e4SLinus Torvalds 17208e0e7c8SDavid Howells if (test_bit(AFS_VNODE_DELETED, &AFS_FS_I(inode)->flags)) 1731da177e4SLinus Torvalds return -ENOENT; 1741da177e4SLinus Torvalds 17500d3b7a4SDavid Howells return afs_open(inode, file); 176ec26815aSDavid Howells } 1771da177e4SLinus Torvalds 1781da177e4SLinus Torvalds /* 179f3ddee8dSDavid Howells * Read the directory into the pagecache in one go, scrubbing the previous 180f3ddee8dSDavid Howells * contents. The list of pages is returned, pinning them so that they don't 181f3ddee8dSDavid Howells * get reclaimed during the iteration. 182f3ddee8dSDavid Howells */ 183f3ddee8dSDavid Howells static struct afs_read *afs_read_dir(struct afs_vnode *dvnode, struct key *key) 184b61f7dcfSDavid Howells __acquires(&dvnode->validate_lock) 185f3ddee8dSDavid Howells { 186f3ddee8dSDavid Howells struct afs_read *req; 187f3ddee8dSDavid Howells loff_t i_size; 188f3ddee8dSDavid Howells int nr_pages, nr_inline, i, n; 189f3ddee8dSDavid Howells int ret = -ENOMEM; 190f3ddee8dSDavid Howells 191f3ddee8dSDavid Howells retry: 192f3ddee8dSDavid Howells i_size = i_size_read(&dvnode->vfs_inode); 193f3ddee8dSDavid Howells if (i_size < 2048) 194f51375cdSDavid Howells return ERR_PTR(afs_bad(dvnode, afs_file_error_dir_small)); 195f51375cdSDavid Howells if (i_size > 2048 * 1024) { 196f51375cdSDavid Howells trace_afs_file_error(dvnode, -EFBIG, afs_file_error_dir_big); 197f3ddee8dSDavid Howells return ERR_PTR(-EFBIG); 198f51375cdSDavid Howells } 199f3ddee8dSDavid Howells 200f3ddee8dSDavid Howells _enter("%llu", i_size); 201f3ddee8dSDavid Howells 202f3ddee8dSDavid Howells /* Get a request record to hold the page list. We want to hold it 203f3ddee8dSDavid Howells * inline if we can, but we don't want to make an order 1 allocation. 204f3ddee8dSDavid Howells */ 205f3ddee8dSDavid Howells nr_pages = (i_size + PAGE_SIZE - 1) / PAGE_SIZE; 206f3ddee8dSDavid Howells nr_inline = nr_pages; 207f3ddee8dSDavid Howells if (nr_inline > (PAGE_SIZE - sizeof(*req)) / sizeof(struct page *)) 208f3ddee8dSDavid Howells nr_inline = 0; 209f3ddee8dSDavid Howells 210f3ddee8dSDavid Howells req = kzalloc(sizeof(*req) + sizeof(struct page *) * nr_inline, 211f3ddee8dSDavid Howells GFP_KERNEL); 212f3ddee8dSDavid Howells if (!req) 213f3ddee8dSDavid Howells return ERR_PTR(-ENOMEM); 214f3ddee8dSDavid Howells 215f3ddee8dSDavid Howells refcount_set(&req->usage, 1); 216f3ddee8dSDavid Howells req->nr_pages = nr_pages; 217f3ddee8dSDavid Howells req->actual_len = i_size; /* May change */ 218f3ddee8dSDavid Howells req->len = nr_pages * PAGE_SIZE; /* We can ask for more than there is */ 219f3ddee8dSDavid Howells req->data_version = dvnode->status.data_version; /* May change */ 220f3ddee8dSDavid Howells if (nr_inline > 0) { 221f3ddee8dSDavid Howells req->pages = req->array; 222f3ddee8dSDavid Howells } else { 223f3ddee8dSDavid Howells req->pages = kcalloc(nr_pages, sizeof(struct page *), 224f3ddee8dSDavid Howells GFP_KERNEL); 225f3ddee8dSDavid Howells if (!req->pages) 226f3ddee8dSDavid Howells goto error; 227f3ddee8dSDavid Howells } 228f3ddee8dSDavid Howells 229f3ddee8dSDavid Howells /* Get a list of all the pages that hold or will hold the directory 230f3ddee8dSDavid Howells * content. We need to fill in any gaps that we might find where the 231f3ddee8dSDavid Howells * memory reclaimer has been at work. If there are any gaps, we will 232f3ddee8dSDavid Howells * need to reread the entire directory contents. 233f3ddee8dSDavid Howells */ 234f3ddee8dSDavid Howells i = 0; 235f3ddee8dSDavid Howells do { 236f3ddee8dSDavid Howells n = find_get_pages_contig(dvnode->vfs_inode.i_mapping, i, 237f3ddee8dSDavid Howells req->nr_pages - i, 238f3ddee8dSDavid Howells req->pages + i); 239f3ddee8dSDavid Howells _debug("find %u at %u/%u", n, i, req->nr_pages); 240f3ddee8dSDavid Howells if (n == 0) { 241f3ddee8dSDavid Howells gfp_t gfp = dvnode->vfs_inode.i_mapping->gfp_mask; 242f3ddee8dSDavid Howells 243f3ddee8dSDavid Howells if (test_and_clear_bit(AFS_VNODE_DIR_VALID, &dvnode->flags)) 244f3ddee8dSDavid Howells afs_stat_v(dvnode, n_inval); 245f3ddee8dSDavid Howells 246f3ddee8dSDavid Howells ret = -ENOMEM; 247f3ddee8dSDavid Howells req->pages[i] = __page_cache_alloc(gfp); 248f3ddee8dSDavid Howells if (!req->pages[i]) 249f3ddee8dSDavid Howells goto error; 250f3ddee8dSDavid Howells ret = add_to_page_cache_lru(req->pages[i], 251f3ddee8dSDavid Howells dvnode->vfs_inode.i_mapping, 252f3ddee8dSDavid Howells i, gfp); 253f3ddee8dSDavid Howells if (ret < 0) 254f3ddee8dSDavid Howells goto error; 255f3ddee8dSDavid Howells 256f3ddee8dSDavid Howells set_page_private(req->pages[i], 1); 257f3ddee8dSDavid Howells SetPagePrivate(req->pages[i]); 258f3ddee8dSDavid Howells unlock_page(req->pages[i]); 259f3ddee8dSDavid Howells i++; 260f3ddee8dSDavid Howells } else { 261f3ddee8dSDavid Howells i += n; 262f3ddee8dSDavid Howells } 263f3ddee8dSDavid Howells } while (i < req->nr_pages); 264f3ddee8dSDavid Howells 265f3ddee8dSDavid Howells /* If we're going to reload, we need to lock all the pages to prevent 266f3ddee8dSDavid Howells * races. 267f3ddee8dSDavid Howells */ 268f3ddee8dSDavid Howells ret = -ERESTARTSYS; 269b61f7dcfSDavid Howells if (down_read_killable(&dvnode->validate_lock) < 0) 270b61f7dcfSDavid Howells goto error; 271f3ddee8dSDavid Howells 272f3ddee8dSDavid Howells if (test_bit(AFS_VNODE_DIR_VALID, &dvnode->flags)) 273f3ddee8dSDavid Howells goto success; 274f3ddee8dSDavid Howells 275b61f7dcfSDavid Howells up_read(&dvnode->validate_lock); 276b61f7dcfSDavid Howells if (down_write_killable(&dvnode->validate_lock) < 0) 277b61f7dcfSDavid Howells goto error; 278b61f7dcfSDavid Howells 279b61f7dcfSDavid Howells if (!test_bit(AFS_VNODE_DIR_VALID, &dvnode->flags)) { 280f3ddee8dSDavid Howells ret = afs_fetch_data(dvnode, key, req); 281f3ddee8dSDavid Howells if (ret < 0) 282b61f7dcfSDavid Howells goto error_unlock; 283f3ddee8dSDavid Howells 284f3ddee8dSDavid Howells task_io_account_read(PAGE_SIZE * req->nr_pages); 285f3ddee8dSDavid Howells 286f3ddee8dSDavid Howells if (req->len < req->file_size) 287f3ddee8dSDavid Howells goto content_has_grown; 288f3ddee8dSDavid Howells 289f3ddee8dSDavid Howells /* Validate the data we just read. */ 290f3ddee8dSDavid Howells ret = -EIO; 291f3ddee8dSDavid Howells for (i = 0; i < req->nr_pages; i++) 292f3ddee8dSDavid Howells if (!afs_dir_check_page(dvnode, req->pages[i], 293f3ddee8dSDavid Howells req->actual_len)) 294b61f7dcfSDavid Howells goto error_unlock; 295f3ddee8dSDavid Howells 296f3ddee8dSDavid Howells // TODO: Trim excess pages 297f3ddee8dSDavid Howells 298f3ddee8dSDavid Howells set_bit(AFS_VNODE_DIR_VALID, &dvnode->flags); 299f3ddee8dSDavid Howells } 300f3ddee8dSDavid Howells 301b61f7dcfSDavid Howells downgrade_write(&dvnode->validate_lock); 302f3ddee8dSDavid Howells success: 303f3ddee8dSDavid Howells return req; 304f3ddee8dSDavid Howells 305f3ddee8dSDavid Howells error_unlock: 306b61f7dcfSDavid Howells up_write(&dvnode->validate_lock); 307f3ddee8dSDavid Howells error: 308f3ddee8dSDavid Howells afs_put_read(req); 309f3ddee8dSDavid Howells _leave(" = %d", ret); 310f3ddee8dSDavid Howells return ERR_PTR(ret); 311f3ddee8dSDavid Howells 312f3ddee8dSDavid Howells content_has_grown: 313b61f7dcfSDavid Howells up_write(&dvnode->validate_lock); 314f3ddee8dSDavid Howells afs_put_read(req); 315f3ddee8dSDavid Howells goto retry; 316f3ddee8dSDavid Howells } 317f3ddee8dSDavid Howells 318f3ddee8dSDavid Howells /* 3191da177e4SLinus Torvalds * deal with one block in an AFS directory 3201da177e4SLinus Torvalds */ 321f51375cdSDavid Howells static int afs_dir_iterate_block(struct afs_vnode *dvnode, 322f51375cdSDavid Howells struct dir_context *ctx, 32300317636SDavid Howells union afs_xdr_dir_block *block, 3241bbae9f8SAl Viro unsigned blkoff) 3251da177e4SLinus Torvalds { 32600317636SDavid Howells union afs_xdr_dirent *dire; 3271da177e4SLinus Torvalds unsigned offset, next, curr; 3281da177e4SLinus Torvalds size_t nlen; 3291bbae9f8SAl Viro int tmp; 3301da177e4SLinus Torvalds 3311bbae9f8SAl Viro _enter("%u,%x,%p,,",(unsigned)ctx->pos,blkoff,block); 3321da177e4SLinus Torvalds 33300317636SDavid Howells curr = (ctx->pos - blkoff) / sizeof(union afs_xdr_dirent); 3341da177e4SLinus Torvalds 3351da177e4SLinus Torvalds /* walk through the block, an entry at a time */ 3364ea219a8SDavid Howells for (offset = (blkoff == 0 ? AFS_DIR_RESV_BLOCKS0 : AFS_DIR_RESV_BLOCKS); 3374ea219a8SDavid Howells offset < AFS_DIR_SLOTS_PER_BLOCK; 3381da177e4SLinus Torvalds offset = next 3391da177e4SLinus Torvalds ) { 3401da177e4SLinus Torvalds next = offset + 1; 3411da177e4SLinus Torvalds 3421da177e4SLinus Torvalds /* skip entries marked unused in the bitmap */ 34300317636SDavid Howells if (!(block->hdr.bitmap[offset / 8] & 3441da177e4SLinus Torvalds (1 << (offset % 8)))) { 3455b5e0928SAlexey Dobriyan _debug("ENT[%zu.%u]: unused", 34600317636SDavid Howells blkoff / sizeof(union afs_xdr_dir_block), offset); 3471da177e4SLinus Torvalds if (offset >= curr) 3481bbae9f8SAl Viro ctx->pos = blkoff + 34900317636SDavid Howells next * sizeof(union afs_xdr_dirent); 3501da177e4SLinus Torvalds continue; 3511da177e4SLinus Torvalds } 3521da177e4SLinus Torvalds 3531da177e4SLinus Torvalds /* got a valid entry */ 3541da177e4SLinus Torvalds dire = &block->dirents[offset]; 3551da177e4SLinus Torvalds nlen = strnlen(dire->u.name, 3561da177e4SLinus Torvalds sizeof(*block) - 35700317636SDavid Howells offset * sizeof(union afs_xdr_dirent)); 3581da177e4SLinus Torvalds 3595b5e0928SAlexey Dobriyan _debug("ENT[%zu.%u]: %s %zu \"%s\"", 36000317636SDavid Howells blkoff / sizeof(union afs_xdr_dir_block), offset, 3611da177e4SLinus Torvalds (offset < curr ? "skip" : "fill"), 3621da177e4SLinus Torvalds nlen, dire->u.name); 3631da177e4SLinus Torvalds 3641da177e4SLinus Torvalds /* work out where the next possible entry is */ 36500317636SDavid Howells for (tmp = nlen; tmp > 15; tmp -= sizeof(union afs_xdr_dirent)) { 3664ea219a8SDavid Howells if (next >= AFS_DIR_SLOTS_PER_BLOCK) { 3675b5e0928SAlexey Dobriyan _debug("ENT[%zu.%u]:" 3681da177e4SLinus Torvalds " %u travelled beyond end dir block" 3695b5e0928SAlexey Dobriyan " (len %u/%zu)", 37000317636SDavid Howells blkoff / sizeof(union afs_xdr_dir_block), 3711da177e4SLinus Torvalds offset, next, tmp, nlen); 372f51375cdSDavid Howells return afs_bad(dvnode, afs_file_error_dir_over_end); 3731da177e4SLinus Torvalds } 37400317636SDavid Howells if (!(block->hdr.bitmap[next / 8] & 3751da177e4SLinus Torvalds (1 << (next % 8)))) { 3765b5e0928SAlexey Dobriyan _debug("ENT[%zu.%u]:" 3775b5e0928SAlexey Dobriyan " %u unmarked extension (len %u/%zu)", 37800317636SDavid Howells blkoff / sizeof(union afs_xdr_dir_block), 3791da177e4SLinus Torvalds offset, next, tmp, nlen); 380f51375cdSDavid Howells return afs_bad(dvnode, afs_file_error_dir_unmarked_ext); 3811da177e4SLinus Torvalds } 3821da177e4SLinus Torvalds 3835b5e0928SAlexey Dobriyan _debug("ENT[%zu.%u]: ext %u/%zu", 38400317636SDavid Howells blkoff / sizeof(union afs_xdr_dir_block), 3851da177e4SLinus Torvalds next, tmp, nlen); 3861da177e4SLinus Torvalds next++; 3871da177e4SLinus Torvalds } 3881da177e4SLinus Torvalds 3891da177e4SLinus Torvalds /* skip if starts before the current position */ 3901da177e4SLinus Torvalds if (offset < curr) 3911da177e4SLinus Torvalds continue; 3921da177e4SLinus Torvalds 3931da177e4SLinus Torvalds /* found the next entry */ 3941bbae9f8SAl Viro if (!dir_emit(ctx, dire->u.name, nlen, 3951da177e4SLinus Torvalds ntohl(dire->u.vnode), 3965cf9dd55SDavid Howells (ctx->actor == afs_lookup_filldir || 3975cf9dd55SDavid Howells ctx->actor == afs_lookup_one_filldir)? 3981bbae9f8SAl Viro ntohl(dire->u.unique) : DT_UNKNOWN)) { 3991da177e4SLinus Torvalds _leave(" = 0 [full]"); 4001da177e4SLinus Torvalds return 0; 4011da177e4SLinus Torvalds } 4021da177e4SLinus Torvalds 40300317636SDavid Howells ctx->pos = blkoff + next * sizeof(union afs_xdr_dirent); 4041da177e4SLinus Torvalds } 4051da177e4SLinus Torvalds 4061da177e4SLinus Torvalds _leave(" = 1 [more]"); 4071da177e4SLinus Torvalds return 1; 408ec26815aSDavid Howells } 4091da177e4SLinus Torvalds 4101da177e4SLinus Torvalds /* 41108e0e7c8SDavid Howells * iterate through the data blob that lists the contents of an AFS directory 4121da177e4SLinus Torvalds */ 4131bbae9f8SAl Viro static int afs_dir_iterate(struct inode *dir, struct dir_context *ctx, 4141bbae9f8SAl Viro struct key *key) 4151da177e4SLinus Torvalds { 416f3ddee8dSDavid Howells struct afs_vnode *dvnode = AFS_FS_I(dir); 41700317636SDavid Howells struct afs_xdr_dir_page *dbuf; 41800317636SDavid Howells union afs_xdr_dir_block *dblock; 419f3ddee8dSDavid Howells struct afs_read *req; 4201da177e4SLinus Torvalds struct page *page; 4211da177e4SLinus Torvalds unsigned blkoff, limit; 4221da177e4SLinus Torvalds int ret; 4231da177e4SLinus Torvalds 4241bbae9f8SAl Viro _enter("{%lu},%u,,", dir->i_ino, (unsigned)ctx->pos); 4251da177e4SLinus Torvalds 42608e0e7c8SDavid Howells if (test_bit(AFS_VNODE_DELETED, &AFS_FS_I(dir)->flags)) { 4271da177e4SLinus Torvalds _leave(" = -ESTALE"); 4281da177e4SLinus Torvalds return -ESTALE; 4291da177e4SLinus Torvalds } 4301da177e4SLinus Torvalds 431f3ddee8dSDavid Howells req = afs_read_dir(dvnode, key); 432f3ddee8dSDavid Howells if (IS_ERR(req)) 433f3ddee8dSDavid Howells return PTR_ERR(req); 434f3ddee8dSDavid Howells 4351da177e4SLinus Torvalds /* round the file position up to the next entry boundary */ 43600317636SDavid Howells ctx->pos += sizeof(union afs_xdr_dirent) - 1; 43700317636SDavid Howells ctx->pos &= ~(sizeof(union afs_xdr_dirent) - 1); 4381da177e4SLinus Torvalds 4391da177e4SLinus Torvalds /* walk through the blocks in sequence */ 4401da177e4SLinus Torvalds ret = 0; 441f3ddee8dSDavid Howells while (ctx->pos < req->actual_len) { 44200317636SDavid Howells blkoff = ctx->pos & ~(sizeof(union afs_xdr_dir_block) - 1); 4431da177e4SLinus Torvalds 444f3ddee8dSDavid Howells /* Fetch the appropriate page from the directory and re-add it 445f3ddee8dSDavid Howells * to the LRU. 446f3ddee8dSDavid Howells */ 447f3ddee8dSDavid Howells page = req->pages[blkoff / PAGE_SIZE]; 448f3ddee8dSDavid Howells if (!page) { 449f51375cdSDavid Howells ret = afs_bad(dvnode, afs_file_error_dir_missing_page); 4501da177e4SLinus Torvalds break; 4511da177e4SLinus Torvalds } 452f3ddee8dSDavid Howells mark_page_accessed(page); 4531da177e4SLinus Torvalds 4541da177e4SLinus Torvalds limit = blkoff & ~(PAGE_SIZE - 1); 4551da177e4SLinus Torvalds 456f3ddee8dSDavid Howells dbuf = kmap(page); 4571da177e4SLinus Torvalds 4581da177e4SLinus Torvalds /* deal with the individual blocks stashed on this page */ 4591da177e4SLinus Torvalds do { 4601da177e4SLinus Torvalds dblock = &dbuf->blocks[(blkoff % PAGE_SIZE) / 46100317636SDavid Howells sizeof(union afs_xdr_dir_block)]; 462f51375cdSDavid Howells ret = afs_dir_iterate_block(dvnode, ctx, dblock, blkoff); 4631da177e4SLinus Torvalds if (ret != 1) { 464f3ddee8dSDavid Howells kunmap(page); 4651da177e4SLinus Torvalds goto out; 4661da177e4SLinus Torvalds } 4671da177e4SLinus Torvalds 46800317636SDavid Howells blkoff += sizeof(union afs_xdr_dir_block); 4691da177e4SLinus Torvalds 4701bbae9f8SAl Viro } while (ctx->pos < dir->i_size && blkoff < limit); 4711da177e4SLinus Torvalds 472f3ddee8dSDavid Howells kunmap(page); 4731da177e4SLinus Torvalds ret = 0; 4741da177e4SLinus Torvalds } 4751da177e4SLinus Torvalds 4761da177e4SLinus Torvalds out: 477b61f7dcfSDavid Howells up_read(&dvnode->validate_lock); 478f3ddee8dSDavid Howells afs_put_read(req); 4791da177e4SLinus Torvalds _leave(" = %d", ret); 4801da177e4SLinus Torvalds return ret; 481ec26815aSDavid Howells } 4821da177e4SLinus Torvalds 4831da177e4SLinus Torvalds /* 4841da177e4SLinus Torvalds * read an AFS directory 4851da177e4SLinus Torvalds */ 4861bbae9f8SAl Viro static int afs_readdir(struct file *file, struct dir_context *ctx) 4871da177e4SLinus Torvalds { 488215804a9SDavid Howells return afs_dir_iterate(file_inode(file), ctx, afs_file_key(file)); 489ec26815aSDavid Howells } 4901da177e4SLinus Torvalds 4911da177e4SLinus Torvalds /* 4925cf9dd55SDavid Howells * Search the directory for a single name 4931da177e4SLinus Torvalds * - if afs_dir_iterate_block() spots this function, it'll pass the FID 4941da177e4SLinus Torvalds * uniquifier through dtype 4951da177e4SLinus Torvalds */ 4965cf9dd55SDavid Howells static int afs_lookup_one_filldir(struct dir_context *ctx, const char *name, 497ac7576f4SMiklos Szeredi int nlen, loff_t fpos, u64 ino, unsigned dtype) 4981da177e4SLinus Torvalds { 4995cf9dd55SDavid Howells struct afs_lookup_one_cookie *cookie = 5005cf9dd55SDavid Howells container_of(ctx, struct afs_lookup_one_cookie, ctx); 5011da177e4SLinus Torvalds 5021bbae9f8SAl Viro _enter("{%s,%u},%s,%u,,%llu,%u", 5031bbae9f8SAl Viro cookie->name.name, cookie->name.len, name, nlen, 504ba3e0e1aSDavid S. Miller (unsigned long long) ino, dtype); 5051da177e4SLinus Torvalds 50608e0e7c8SDavid Howells /* insanity checks first */ 50700317636SDavid Howells BUILD_BUG_ON(sizeof(union afs_xdr_dir_block) != 2048); 50800317636SDavid Howells BUILD_BUG_ON(sizeof(union afs_xdr_dirent) != 32); 50908e0e7c8SDavid Howells 5101bbae9f8SAl Viro if (cookie->name.len != nlen || 5111bbae9f8SAl Viro memcmp(cookie->name.name, name, nlen) != 0) { 5121da177e4SLinus Torvalds _leave(" = 0 [no]"); 5131da177e4SLinus Torvalds return 0; 5141da177e4SLinus Torvalds } 5151da177e4SLinus Torvalds 5161da177e4SLinus Torvalds cookie->fid.vnode = ino; 5171da177e4SLinus Torvalds cookie->fid.unique = dtype; 5181da177e4SLinus Torvalds cookie->found = 1; 5191da177e4SLinus Torvalds 5201da177e4SLinus Torvalds _leave(" = -1 [found]"); 5211da177e4SLinus Torvalds return -1; 522ec26815aSDavid Howells } 5231da177e4SLinus Torvalds 5241da177e4SLinus Torvalds /* 5255cf9dd55SDavid Howells * Do a lookup of a single name in a directory 526260a9803SDavid Howells * - just returns the FID the dentry name maps to if found 5271da177e4SLinus Torvalds */ 5285cf9dd55SDavid Howells static int afs_do_lookup_one(struct inode *dir, struct dentry *dentry, 52900d3b7a4SDavid Howells struct afs_fid *fid, struct key *key) 5301da177e4SLinus Torvalds { 5311bbae9f8SAl Viro struct afs_super_info *as = dir->i_sb->s_fs_info; 5325cf9dd55SDavid Howells struct afs_lookup_one_cookie cookie = { 5335cf9dd55SDavid Howells .ctx.actor = afs_lookup_one_filldir, 5341bbae9f8SAl Viro .name = dentry->d_name, 5351bbae9f8SAl Viro .fid.vid = as->volume->vid 5361bbae9f8SAl Viro }; 5371da177e4SLinus Torvalds int ret; 5381da177e4SLinus Torvalds 539a455589fSAl Viro _enter("{%lu},%p{%pd},", dir->i_ino, dentry, dentry); 5401da177e4SLinus Torvalds 5411da177e4SLinus Torvalds /* search the directory */ 5421bbae9f8SAl Viro ret = afs_dir_iterate(dir, &cookie.ctx, key); 5431da177e4SLinus Torvalds if (ret < 0) { 54408e0e7c8SDavid Howells _leave(" = %d [iter]", ret); 54508e0e7c8SDavid Howells return ret; 5461da177e4SLinus Torvalds } 5471da177e4SLinus Torvalds 5481da177e4SLinus Torvalds ret = -ENOENT; 5491da177e4SLinus Torvalds if (!cookie.found) { 55008e0e7c8SDavid Howells _leave(" = -ENOENT [not found]"); 55108e0e7c8SDavid Howells return -ENOENT; 55208e0e7c8SDavid Howells } 55308e0e7c8SDavid Howells 55408e0e7c8SDavid Howells *fid = cookie.fid; 5553b6492dfSDavid Howells _leave(" = 0 { vn=%llu u=%u }", fid->vnode, fid->unique); 55608e0e7c8SDavid Howells return 0; 55708e0e7c8SDavid Howells } 55808e0e7c8SDavid Howells 55908e0e7c8SDavid Howells /* 5605cf9dd55SDavid Howells * search the directory for a name 5615cf9dd55SDavid Howells * - if afs_dir_iterate_block() spots this function, it'll pass the FID 5625cf9dd55SDavid Howells * uniquifier through dtype 5635cf9dd55SDavid Howells */ 5645cf9dd55SDavid Howells static int afs_lookup_filldir(struct dir_context *ctx, const char *name, 5655cf9dd55SDavid Howells int nlen, loff_t fpos, u64 ino, unsigned dtype) 5665cf9dd55SDavid Howells { 5675cf9dd55SDavid Howells struct afs_lookup_cookie *cookie = 5685cf9dd55SDavid Howells container_of(ctx, struct afs_lookup_cookie, ctx); 5695cf9dd55SDavid Howells int ret; 5705cf9dd55SDavid Howells 5715cf9dd55SDavid Howells _enter("{%s,%u},%s,%u,,%llu,%u", 5725cf9dd55SDavid Howells cookie->name.name, cookie->name.len, name, nlen, 5735cf9dd55SDavid Howells (unsigned long long) ino, dtype); 5745cf9dd55SDavid Howells 5755cf9dd55SDavid Howells /* insanity checks first */ 57600317636SDavid Howells BUILD_BUG_ON(sizeof(union afs_xdr_dir_block) != 2048); 57700317636SDavid Howells BUILD_BUG_ON(sizeof(union afs_xdr_dirent) != 32); 5785cf9dd55SDavid Howells 5795cf9dd55SDavid Howells if (cookie->found) { 5805cf9dd55SDavid Howells if (cookie->nr_fids < 50) { 5815cf9dd55SDavid Howells cookie->fids[cookie->nr_fids].vnode = ino; 5825cf9dd55SDavid Howells cookie->fids[cookie->nr_fids].unique = dtype; 5835cf9dd55SDavid Howells cookie->nr_fids++; 5845cf9dd55SDavid Howells } 5855cf9dd55SDavid Howells } else if (cookie->name.len == nlen && 5865cf9dd55SDavid Howells memcmp(cookie->name.name, name, nlen) == 0) { 5875cf9dd55SDavid Howells cookie->fids[0].vnode = ino; 5885cf9dd55SDavid Howells cookie->fids[0].unique = dtype; 5895cf9dd55SDavid Howells cookie->found = 1; 5905cf9dd55SDavid Howells if (cookie->one_only) 5915cf9dd55SDavid Howells return -1; 5925cf9dd55SDavid Howells } 5935cf9dd55SDavid Howells 5945cf9dd55SDavid Howells ret = cookie->nr_fids >= 50 ? -1 : 0; 5955cf9dd55SDavid Howells _leave(" = %d", ret); 5965cf9dd55SDavid Howells return ret; 5975cf9dd55SDavid Howells } 5985cf9dd55SDavid Howells 5995cf9dd55SDavid Howells /* 6005cf9dd55SDavid Howells * Do a lookup in a directory. We make use of bulk lookup to query a slew of 6015cf9dd55SDavid Howells * files in one go and create inodes for them. The inode of the file we were 6025cf9dd55SDavid Howells * asked for is returned. 6035cf9dd55SDavid Howells */ 6045cf9dd55SDavid Howells static struct inode *afs_do_lookup(struct inode *dir, struct dentry *dentry, 6055cf9dd55SDavid Howells struct key *key) 6065cf9dd55SDavid Howells { 6075cf9dd55SDavid Howells struct afs_lookup_cookie *cookie; 6085cf9dd55SDavid Howells struct afs_cb_interest *cbi = NULL; 6095cf9dd55SDavid Howells struct afs_super_info *as = dir->i_sb->s_fs_info; 6105cf9dd55SDavid Howells struct afs_iget_data data; 6115cf9dd55SDavid Howells struct afs_fs_cursor fc; 6125cf9dd55SDavid Howells struct afs_vnode *dvnode = AFS_FS_I(dir); 6135cf9dd55SDavid Howells struct inode *inode = NULL; 6145cf9dd55SDavid Howells int ret, i; 6155cf9dd55SDavid Howells 6165cf9dd55SDavid Howells _enter("{%lu},%p{%pd},", dir->i_ino, dentry, dentry); 6175cf9dd55SDavid Howells 6185cf9dd55SDavid Howells cookie = kzalloc(sizeof(struct afs_lookup_cookie), GFP_KERNEL); 6195cf9dd55SDavid Howells if (!cookie) 6205cf9dd55SDavid Howells return ERR_PTR(-ENOMEM); 6215cf9dd55SDavid Howells 6225cf9dd55SDavid Howells cookie->ctx.actor = afs_lookup_filldir; 6235cf9dd55SDavid Howells cookie->name = dentry->d_name; 6245cf9dd55SDavid Howells cookie->nr_fids = 1; /* slot 0 is saved for the fid we actually want */ 6255cf9dd55SDavid Howells 6265cf9dd55SDavid Howells read_seqlock_excl(&dvnode->cb_lock); 6275cf9dd55SDavid Howells if (dvnode->cb_interest && 6285cf9dd55SDavid Howells dvnode->cb_interest->server && 6295cf9dd55SDavid Howells test_bit(AFS_SERVER_FL_NO_IBULK, &dvnode->cb_interest->server->flags)) 6305cf9dd55SDavid Howells cookie->one_only = true; 6315cf9dd55SDavid Howells read_sequnlock_excl(&dvnode->cb_lock); 6325cf9dd55SDavid Howells 6335cf9dd55SDavid Howells for (i = 0; i < 50; i++) 6345cf9dd55SDavid Howells cookie->fids[i].vid = as->volume->vid; 6355cf9dd55SDavid Howells 6365cf9dd55SDavid Howells /* search the directory */ 6375cf9dd55SDavid Howells ret = afs_dir_iterate(dir, &cookie->ctx, key); 6385cf9dd55SDavid Howells if (ret < 0) { 6395cf9dd55SDavid Howells inode = ERR_PTR(ret); 6405cf9dd55SDavid Howells goto out; 6415cf9dd55SDavid Howells } 6425cf9dd55SDavid Howells 6435cf9dd55SDavid Howells inode = ERR_PTR(-ENOENT); 6445cf9dd55SDavid Howells if (!cookie->found) 6455cf9dd55SDavid Howells goto out; 6465cf9dd55SDavid Howells 6475cf9dd55SDavid Howells /* Check to see if we already have an inode for the primary fid. */ 6485cf9dd55SDavid Howells data.volume = dvnode->volume; 6495cf9dd55SDavid Howells data.fid = cookie->fids[0]; 6505cf9dd55SDavid Howells inode = ilookup5(dir->i_sb, cookie->fids[0].vnode, afs_iget5_test, &data); 6515cf9dd55SDavid Howells if (inode) 6525cf9dd55SDavid Howells goto out; 6535cf9dd55SDavid Howells 6545cf9dd55SDavid Howells /* Need space for examining all the selected files */ 6555cf9dd55SDavid Howells inode = ERR_PTR(-ENOMEM); 6565cf9dd55SDavid Howells cookie->statuses = kcalloc(cookie->nr_fids, sizeof(struct afs_file_status), 6575cf9dd55SDavid Howells GFP_KERNEL); 6585cf9dd55SDavid Howells if (!cookie->statuses) 6595cf9dd55SDavid Howells goto out; 6605cf9dd55SDavid Howells 6615cf9dd55SDavid Howells cookie->callbacks = kcalloc(cookie->nr_fids, sizeof(struct afs_callback), 6625cf9dd55SDavid Howells GFP_KERNEL); 6635cf9dd55SDavid Howells if (!cookie->callbacks) 6645cf9dd55SDavid Howells goto out_s; 6655cf9dd55SDavid Howells 6665cf9dd55SDavid Howells /* Try FS.InlineBulkStatus first. Abort codes for the individual 6675cf9dd55SDavid Howells * lookups contained therein are stored in the reply without aborting 6685cf9dd55SDavid Howells * the whole operation. 6695cf9dd55SDavid Howells */ 6705cf9dd55SDavid Howells if (cookie->one_only) 6715cf9dd55SDavid Howells goto no_inline_bulk_status; 6725cf9dd55SDavid Howells 6735cf9dd55SDavid Howells inode = ERR_PTR(-ERESTARTSYS); 6745cf9dd55SDavid Howells if (afs_begin_vnode_operation(&fc, dvnode, key)) { 6755cf9dd55SDavid Howells while (afs_select_fileserver(&fc)) { 6765cf9dd55SDavid Howells if (test_bit(AFS_SERVER_FL_NO_IBULK, 6775cf9dd55SDavid Howells &fc.cbi->server->flags)) { 6785cf9dd55SDavid Howells fc.ac.abort_code = RX_INVALID_OPERATION; 6795cf9dd55SDavid Howells fc.ac.error = -ECONNABORTED; 6805cf9dd55SDavid Howells break; 6815cf9dd55SDavid Howells } 6825cf9dd55SDavid Howells afs_fs_inline_bulk_status(&fc, 6835cf9dd55SDavid Howells afs_v2net(dvnode), 6845cf9dd55SDavid Howells cookie->fids, 6855cf9dd55SDavid Howells cookie->statuses, 6865cf9dd55SDavid Howells cookie->callbacks, 6875cf9dd55SDavid Howells cookie->nr_fids, NULL); 6885cf9dd55SDavid Howells } 6895cf9dd55SDavid Howells 6905cf9dd55SDavid Howells if (fc.ac.error == 0) 6915cf9dd55SDavid Howells cbi = afs_get_cb_interest(fc.cbi); 6925cf9dd55SDavid Howells if (fc.ac.abort_code == RX_INVALID_OPERATION) 6935cf9dd55SDavid Howells set_bit(AFS_SERVER_FL_NO_IBULK, &fc.cbi->server->flags); 6945cf9dd55SDavid Howells inode = ERR_PTR(afs_end_vnode_operation(&fc)); 6955cf9dd55SDavid Howells } 6965cf9dd55SDavid Howells 6975cf9dd55SDavid Howells if (!IS_ERR(inode)) 6985cf9dd55SDavid Howells goto success; 6995cf9dd55SDavid Howells if (fc.ac.abort_code != RX_INVALID_OPERATION) 7005cf9dd55SDavid Howells goto out_c; 7015cf9dd55SDavid Howells 7025cf9dd55SDavid Howells no_inline_bulk_status: 7035cf9dd55SDavid Howells /* We could try FS.BulkStatus next, but this aborts the entire op if 7045cf9dd55SDavid Howells * any of the lookups fails - so, for the moment, revert to 7055cf9dd55SDavid Howells * FS.FetchStatus for just the primary fid. 7065cf9dd55SDavid Howells */ 7075cf9dd55SDavid Howells cookie->nr_fids = 1; 7085cf9dd55SDavid Howells inode = ERR_PTR(-ERESTARTSYS); 7095cf9dd55SDavid Howells if (afs_begin_vnode_operation(&fc, dvnode, key)) { 7105cf9dd55SDavid Howells while (afs_select_fileserver(&fc)) { 7115cf9dd55SDavid Howells afs_fs_fetch_status(&fc, 7125cf9dd55SDavid Howells afs_v2net(dvnode), 7135cf9dd55SDavid Howells cookie->fids, 7145cf9dd55SDavid Howells cookie->statuses, 7155cf9dd55SDavid Howells cookie->callbacks, 7165cf9dd55SDavid Howells NULL); 7175cf9dd55SDavid Howells } 7185cf9dd55SDavid Howells 7195cf9dd55SDavid Howells if (fc.ac.error == 0) 7205cf9dd55SDavid Howells cbi = afs_get_cb_interest(fc.cbi); 7215cf9dd55SDavid Howells inode = ERR_PTR(afs_end_vnode_operation(&fc)); 7225cf9dd55SDavid Howells } 7235cf9dd55SDavid Howells 7245cf9dd55SDavid Howells if (IS_ERR(inode)) 7255cf9dd55SDavid Howells goto out_c; 7265cf9dd55SDavid Howells 7275cf9dd55SDavid Howells for (i = 0; i < cookie->nr_fids; i++) 7285cf9dd55SDavid Howells cookie->statuses[i].abort_code = 0; 7295cf9dd55SDavid Howells 7305cf9dd55SDavid Howells success: 7315cf9dd55SDavid Howells /* Turn all the files into inodes and save the first one - which is the 7325cf9dd55SDavid Howells * one we actually want. 7335cf9dd55SDavid Howells */ 7345cf9dd55SDavid Howells if (cookie->statuses[0].abort_code != 0) 7355cf9dd55SDavid Howells inode = ERR_PTR(afs_abort_to_error(cookie->statuses[0].abort_code)); 7365cf9dd55SDavid Howells 7375cf9dd55SDavid Howells for (i = 0; i < cookie->nr_fids; i++) { 7385cf9dd55SDavid Howells struct inode *ti; 7395cf9dd55SDavid Howells 7405cf9dd55SDavid Howells if (cookie->statuses[i].abort_code != 0) 7415cf9dd55SDavid Howells continue; 7425cf9dd55SDavid Howells 7435cf9dd55SDavid Howells ti = afs_iget(dir->i_sb, key, &cookie->fids[i], 7445cf9dd55SDavid Howells &cookie->statuses[i], 7455cf9dd55SDavid Howells &cookie->callbacks[i], 7465cf9dd55SDavid Howells cbi); 7475cf9dd55SDavid Howells if (i == 0) { 7485cf9dd55SDavid Howells inode = ti; 7495cf9dd55SDavid Howells } else { 7505cf9dd55SDavid Howells if (!IS_ERR(ti)) 7515cf9dd55SDavid Howells iput(ti); 7525cf9dd55SDavid Howells } 7535cf9dd55SDavid Howells } 7545cf9dd55SDavid Howells 7555cf9dd55SDavid Howells out_c: 7565cf9dd55SDavid Howells afs_put_cb_interest(afs_v2net(dvnode), cbi); 7575cf9dd55SDavid Howells kfree(cookie->callbacks); 7585cf9dd55SDavid Howells out_s: 7595cf9dd55SDavid Howells kfree(cookie->statuses); 7605cf9dd55SDavid Howells out: 7615cf9dd55SDavid Howells kfree(cookie); 7625cf9dd55SDavid Howells return inode; 7635cf9dd55SDavid Howells } 7645cf9dd55SDavid Howells 7655cf9dd55SDavid Howells /* 7666f8880d8SDavid Howells * Look up an entry in a directory with @sys substitution. 7676f8880d8SDavid Howells */ 7686f8880d8SDavid Howells static struct dentry *afs_lookup_atsys(struct inode *dir, struct dentry *dentry, 7696f8880d8SDavid Howells struct key *key) 7706f8880d8SDavid Howells { 7716f8880d8SDavid Howells struct afs_sysnames *subs; 7726f8880d8SDavid Howells struct afs_net *net = afs_i2net(dir); 7736f8880d8SDavid Howells struct dentry *ret; 7746f8880d8SDavid Howells char *buf, *p, *name; 7756f8880d8SDavid Howells int len, i; 7766f8880d8SDavid Howells 7776f8880d8SDavid Howells _enter(""); 7786f8880d8SDavid Howells 7796f8880d8SDavid Howells ret = ERR_PTR(-ENOMEM); 7806f8880d8SDavid Howells p = buf = kmalloc(AFSNAMEMAX, GFP_KERNEL); 7816f8880d8SDavid Howells if (!buf) 7826f8880d8SDavid Howells goto out_p; 7836f8880d8SDavid Howells if (dentry->d_name.len > 4) { 7846f8880d8SDavid Howells memcpy(p, dentry->d_name.name, dentry->d_name.len - 4); 7856f8880d8SDavid Howells p += dentry->d_name.len - 4; 7866f8880d8SDavid Howells } 7876f8880d8SDavid Howells 7886f8880d8SDavid Howells /* There is an ordered list of substitutes that we have to try. */ 7896f8880d8SDavid Howells read_lock(&net->sysnames_lock); 7906f8880d8SDavid Howells subs = net->sysnames; 7916f8880d8SDavid Howells refcount_inc(&subs->usage); 7926f8880d8SDavid Howells read_unlock(&net->sysnames_lock); 7936f8880d8SDavid Howells 7946f8880d8SDavid Howells for (i = 0; i < subs->nr; i++) { 7956f8880d8SDavid Howells name = subs->subs[i]; 7966f8880d8SDavid Howells len = dentry->d_name.len - 4 + strlen(name); 7976f8880d8SDavid Howells if (len >= AFSNAMEMAX) { 7986f8880d8SDavid Howells ret = ERR_PTR(-ENAMETOOLONG); 7996f8880d8SDavid Howells goto out_s; 8006f8880d8SDavid Howells } 8016f8880d8SDavid Howells 8026f8880d8SDavid Howells strcpy(p, name); 8036f8880d8SDavid Howells ret = lookup_one_len(buf, dentry->d_parent, len); 8046f8880d8SDavid Howells if (IS_ERR(ret) || d_is_positive(ret)) 8056f8880d8SDavid Howells goto out_s; 8066f8880d8SDavid Howells dput(ret); 8076f8880d8SDavid Howells } 8086f8880d8SDavid Howells 8096f8880d8SDavid Howells /* We don't want to d_add() the @sys dentry here as we don't want to 8106f8880d8SDavid Howells * the cached dentry to hide changes to the sysnames list. 8116f8880d8SDavid Howells */ 8126f8880d8SDavid Howells ret = NULL; 8136f8880d8SDavid Howells out_s: 8146f8880d8SDavid Howells afs_put_sysnames(subs); 8156f8880d8SDavid Howells kfree(buf); 8166f8880d8SDavid Howells out_p: 8176f8880d8SDavid Howells key_put(key); 8186f8880d8SDavid Howells return ret; 8196f8880d8SDavid Howells } 8206f8880d8SDavid Howells 8216f8880d8SDavid Howells /* 82208e0e7c8SDavid Howells * look up an entry in a directory 82308e0e7c8SDavid Howells */ 824260a9803SDavid Howells static struct dentry *afs_lookup(struct inode *dir, struct dentry *dentry, 82500cd8dd3SAl Viro unsigned int flags) 82608e0e7c8SDavid Howells { 8275cf9dd55SDavid Howells struct afs_vnode *dvnode = AFS_FS_I(dir); 82808e0e7c8SDavid Howells struct inode *inode; 82934b2a88fSAl Viro struct dentry *d; 83000d3b7a4SDavid Howells struct key *key; 83108e0e7c8SDavid Howells int ret; 83208e0e7c8SDavid Howells 8333b6492dfSDavid Howells _enter("{%llx:%llu},%p{%pd},", 8345cf9dd55SDavid Howells dvnode->fid.vid, dvnode->fid.vnode, dentry, dentry); 835260a9803SDavid Howells 8362b0143b5SDavid Howells ASSERTCMP(d_inode(dentry), ==, NULL); 83708e0e7c8SDavid Howells 83845222b9eSDavid Howells if (dentry->d_name.len >= AFSNAMEMAX) { 83908e0e7c8SDavid Howells _leave(" = -ENAMETOOLONG"); 84008e0e7c8SDavid Howells return ERR_PTR(-ENAMETOOLONG); 84108e0e7c8SDavid Howells } 84208e0e7c8SDavid Howells 8435cf9dd55SDavid Howells if (test_bit(AFS_VNODE_DELETED, &dvnode->flags)) { 84408e0e7c8SDavid Howells _leave(" = -ESTALE"); 84508e0e7c8SDavid Howells return ERR_PTR(-ESTALE); 84608e0e7c8SDavid Howells } 84708e0e7c8SDavid Howells 8485cf9dd55SDavid Howells key = afs_request_key(dvnode->volume->cell); 84900d3b7a4SDavid Howells if (IS_ERR(key)) { 85000d3b7a4SDavid Howells _leave(" = %ld [key]", PTR_ERR(key)); 851e231c2eeSDavid Howells return ERR_CAST(key); 85200d3b7a4SDavid Howells } 85300d3b7a4SDavid Howells 8545cf9dd55SDavid Howells ret = afs_validate(dvnode, key); 85508e0e7c8SDavid Howells if (ret < 0) { 85600d3b7a4SDavid Howells key_put(key); 857260a9803SDavid Howells _leave(" = %d [val]", ret); 8581da177e4SLinus Torvalds return ERR_PTR(ret); 8591da177e4SLinus Torvalds } 8601da177e4SLinus Torvalds 8616f8880d8SDavid Howells if (dentry->d_name.len >= 4 && 8626f8880d8SDavid Howells dentry->d_name.name[dentry->d_name.len - 4] == '@' && 8636f8880d8SDavid Howells dentry->d_name.name[dentry->d_name.len - 3] == 's' && 8646f8880d8SDavid Howells dentry->d_name.name[dentry->d_name.len - 2] == 'y' && 8656f8880d8SDavid Howells dentry->d_name.name[dentry->d_name.len - 1] == 's') 8666f8880d8SDavid Howells return afs_lookup_atsys(dir, dentry, key); 8676f8880d8SDavid Howells 868d55b4da4SDavid Howells afs_stat_v(dvnode, n_lookup); 8695cf9dd55SDavid Howells inode = afs_do_lookup(dir, dentry, key); 87034b2a88fSAl Viro key_put(key); 87134b2a88fSAl Viro if (inode == ERR_PTR(-ENOENT)) { 8725cf9dd55SDavid Howells inode = afs_try_auto_mntpt(dentry, dir); 87334b2a88fSAl Viro } else { 87434b2a88fSAl Viro dentry->d_fsdata = 87534b2a88fSAl Viro (void *)(unsigned long)dvnode->status.data_version; 876bec5eb61Swanglei } 87734b2a88fSAl Viro d = d_splice_alias(inode, dentry); 87834b2a88fSAl Viro if (!IS_ERR_OR_NULL(d)) 87934b2a88fSAl Viro d->d_fsdata = dentry->d_fsdata; 88034b2a88fSAl Viro return d; 881ec26815aSDavid Howells } 8821da177e4SLinus Torvalds 8831da177e4SLinus Torvalds /* 8841da177e4SLinus Torvalds * check that a dentry lookup hit has found a valid entry 8851da177e4SLinus Torvalds * - NOTE! the hit can be a negative hit too, so we can't assume we have an 8861da177e4SLinus Torvalds * inode 8871da177e4SLinus Torvalds */ 8880b728e19SAl Viro static int afs_d_revalidate(struct dentry *dentry, unsigned int flags) 8891da177e4SLinus Torvalds { 890260a9803SDavid Howells struct afs_vnode *vnode, *dir; 891dd0d9a46SArtem Bityutskiy struct afs_fid uninitialized_var(fid); 8921da177e4SLinus Torvalds struct dentry *parent; 893c435ee34SDavid Howells struct inode *inode; 89400d3b7a4SDavid Howells struct key *key; 895a4ff7401SDavid Howells long dir_version, de_version; 8961da177e4SLinus Torvalds int ret; 8971da177e4SLinus Torvalds 8980b728e19SAl Viro if (flags & LOOKUP_RCU) 89934286d66SNick Piggin return -ECHILD; 90034286d66SNick Piggin 901c435ee34SDavid Howells if (d_really_is_positive(dentry)) { 9022b0143b5SDavid Howells vnode = AFS_FS_I(d_inode(dentry)); 9033b6492dfSDavid Howells _enter("{v={%llx:%llu} n=%pd fl=%lx},", 904a455589fSAl Viro vnode->fid.vid, vnode->fid.vnode, dentry, 905260a9803SDavid Howells vnode->flags); 906c435ee34SDavid Howells } else { 907a455589fSAl Viro _enter("{neg n=%pd}", dentry); 908c435ee34SDavid Howells } 9091da177e4SLinus Torvalds 910260a9803SDavid Howells key = afs_request_key(AFS_FS_S(dentry->d_sb)->volume->cell); 91100d3b7a4SDavid Howells if (IS_ERR(key)) 91200d3b7a4SDavid Howells key = NULL; 91300d3b7a4SDavid Howells 914c435ee34SDavid Howells if (d_really_is_positive(dentry)) { 915c435ee34SDavid Howells inode = d_inode(dentry); 916c435ee34SDavid Howells if (inode) { 917c435ee34SDavid Howells vnode = AFS_FS_I(inode); 918c435ee34SDavid Howells afs_validate(vnode, key); 919c435ee34SDavid Howells if (test_bit(AFS_VNODE_DELETED, &vnode->flags)) 920c435ee34SDavid Howells goto out_bad; 921c435ee34SDavid Howells } 922c435ee34SDavid Howells } 923c435ee34SDavid Howells 9241da177e4SLinus Torvalds /* lock down the parent dentry so we can peer at it */ 92508e0e7c8SDavid Howells parent = dget_parent(dentry); 9262b0143b5SDavid Howells dir = AFS_FS_I(d_inode(parent)); 9271da177e4SLinus Torvalds 928260a9803SDavid Howells /* validate the parent directory */ 929260a9803SDavid Howells afs_validate(dir, key); 930260a9803SDavid Howells 931260a9803SDavid Howells if (test_bit(AFS_VNODE_DELETED, &dir->flags)) { 932a455589fSAl Viro _debug("%pd: parent dir deleted", dentry); 933c435ee34SDavid Howells goto out_bad_parent; 9341da177e4SLinus Torvalds } 9351da177e4SLinus Torvalds 936a4ff7401SDavid Howells /* We only need to invalidate a dentry if the server's copy changed 937a4ff7401SDavid Howells * behind our back. If we made the change, it's no problem. Note that 938a4ff7401SDavid Howells * on a 32-bit system, we only have 32 bits in the dentry to store the 939a4ff7401SDavid Howells * version. 940a4ff7401SDavid Howells */ 941a4ff7401SDavid Howells dir_version = (long)dir->status.data_version; 942a4ff7401SDavid Howells de_version = (long)dentry->d_fsdata; 943a4ff7401SDavid Howells if (de_version == dir_version) 944a4ff7401SDavid Howells goto out_valid; 945a4ff7401SDavid Howells 946a4ff7401SDavid Howells dir_version = (long)dir->invalid_before; 947a4ff7401SDavid Howells if (de_version - dir_version >= 0) 948a4ff7401SDavid Howells goto out_valid; 949260a9803SDavid Howells 95008e0e7c8SDavid Howells _debug("dir modified"); 951d55b4da4SDavid Howells afs_stat_v(dir, n_reval); 9521da177e4SLinus Torvalds 9531da177e4SLinus Torvalds /* search the directory for this vnode */ 9545cf9dd55SDavid Howells ret = afs_do_lookup_one(&dir->vfs_inode, dentry, &fid, key); 955260a9803SDavid Howells switch (ret) { 956260a9803SDavid Howells case 0: 957260a9803SDavid Howells /* the filename maps to something */ 9582b0143b5SDavid Howells if (d_really_is_negative(dentry)) 959c435ee34SDavid Howells goto out_bad_parent; 960c435ee34SDavid Howells inode = d_inode(dentry); 961c435ee34SDavid Howells if (is_bad_inode(inode)) { 962a455589fSAl Viro printk("kAFS: afs_d_revalidate: %pd2 has bad inode\n", 963a455589fSAl Viro dentry); 964c435ee34SDavid Howells goto out_bad_parent; 9651da177e4SLinus Torvalds } 9661da177e4SLinus Torvalds 967c435ee34SDavid Howells vnode = AFS_FS_I(inode); 968c435ee34SDavid Howells 9691da177e4SLinus Torvalds /* if the vnode ID has changed, then the dirent points to a 9701da177e4SLinus Torvalds * different file */ 97108e0e7c8SDavid Howells if (fid.vnode != vnode->fid.vnode) { 9723b6492dfSDavid Howells _debug("%pd: dirent changed [%llu != %llu]", 973a455589fSAl Viro dentry, fid.vnode, 97408e0e7c8SDavid Howells vnode->fid.vnode); 9751da177e4SLinus Torvalds goto not_found; 9761da177e4SLinus Torvalds } 9771da177e4SLinus Torvalds 9781da177e4SLinus Torvalds /* if the vnode ID uniqifier has changed, then the file has 979260a9803SDavid Howells * been deleted and replaced, and the original vnode ID has 980260a9803SDavid Howells * been reused */ 98108e0e7c8SDavid Howells if (fid.unique != vnode->fid.unique) { 982a455589fSAl Viro _debug("%pd: file deleted (uq %u -> %u I:%u)", 983a455589fSAl Viro dentry, fid.unique, 9847a224228SJean Noel Cordenner vnode->fid.unique, 985c435ee34SDavid Howells vnode->vfs_inode.i_generation); 986c435ee34SDavid Howells write_seqlock(&vnode->cb_lock); 98708e0e7c8SDavid Howells set_bit(AFS_VNODE_DELETED, &vnode->flags); 988c435ee34SDavid Howells write_sequnlock(&vnode->cb_lock); 989260a9803SDavid Howells goto not_found; 990260a9803SDavid Howells } 991260a9803SDavid Howells goto out_valid; 992260a9803SDavid Howells 993260a9803SDavid Howells case -ENOENT: 994260a9803SDavid Howells /* the filename is unknown */ 995a455589fSAl Viro _debug("%pd: dirent not found", dentry); 9962b0143b5SDavid Howells if (d_really_is_positive(dentry)) 997260a9803SDavid Howells goto not_found; 998260a9803SDavid Howells goto out_valid; 999260a9803SDavid Howells 1000260a9803SDavid Howells default: 1001a455589fSAl Viro _debug("failed to iterate dir %pd: %d", 1002a455589fSAl Viro parent, ret); 1003c435ee34SDavid Howells goto out_bad_parent; 10041da177e4SLinus Torvalds } 100508e0e7c8SDavid Howells 10061da177e4SLinus Torvalds out_valid: 1007a4ff7401SDavid Howells dentry->d_fsdata = (void *)dir_version; 10081da177e4SLinus Torvalds dput(parent); 100900d3b7a4SDavid Howells key_put(key); 10101da177e4SLinus Torvalds _leave(" = 1 [valid]"); 10111da177e4SLinus Torvalds return 1; 10121da177e4SLinus Torvalds 10131da177e4SLinus Torvalds /* the dirent, if it exists, now points to a different vnode */ 10141da177e4SLinus Torvalds not_found: 10151da177e4SLinus Torvalds spin_lock(&dentry->d_lock); 10161da177e4SLinus Torvalds dentry->d_flags |= DCACHE_NFSFS_RENAMED; 10171da177e4SLinus Torvalds spin_unlock(&dentry->d_lock); 10181da177e4SLinus Torvalds 1019c435ee34SDavid Howells out_bad_parent: 1020a455589fSAl Viro _debug("dropping dentry %pd2", dentry); 10211da177e4SLinus Torvalds dput(parent); 1022c435ee34SDavid Howells out_bad: 102300d3b7a4SDavid Howells key_put(key); 10241da177e4SLinus Torvalds 10251da177e4SLinus Torvalds _leave(" = 0 [bad]"); 10261da177e4SLinus Torvalds return 0; 1027ec26815aSDavid Howells } 10281da177e4SLinus Torvalds 10291da177e4SLinus Torvalds /* 10301da177e4SLinus Torvalds * allow the VFS to enquire as to whether a dentry should be unhashed (mustn't 10311da177e4SLinus Torvalds * sleep) 10321da177e4SLinus Torvalds * - called from dput() when d_count is going to 0. 10331da177e4SLinus Torvalds * - return 1 to request dentry be unhashed, 0 otherwise 10341da177e4SLinus Torvalds */ 1035fe15ce44SNick Piggin static int afs_d_delete(const struct dentry *dentry) 10361da177e4SLinus Torvalds { 1037a455589fSAl Viro _enter("%pd", dentry); 10381da177e4SLinus Torvalds 10391da177e4SLinus Torvalds if (dentry->d_flags & DCACHE_NFSFS_RENAMED) 10401da177e4SLinus Torvalds goto zap; 10411da177e4SLinus Torvalds 10422b0143b5SDavid Howells if (d_really_is_positive(dentry) && 10432b0143b5SDavid Howells (test_bit(AFS_VNODE_DELETED, &AFS_FS_I(d_inode(dentry))->flags) || 10442b0143b5SDavid Howells test_bit(AFS_VNODE_PSEUDODIR, &AFS_FS_I(d_inode(dentry))->flags))) 10451da177e4SLinus Torvalds goto zap; 10461da177e4SLinus Torvalds 10471da177e4SLinus Torvalds _leave(" = 0 [keep]"); 10481da177e4SLinus Torvalds return 0; 10491da177e4SLinus Torvalds 10501da177e4SLinus Torvalds zap: 10511da177e4SLinus Torvalds _leave(" = 1 [zap]"); 10521da177e4SLinus Torvalds return 1; 1053ec26815aSDavid Howells } 1054260a9803SDavid Howells 1055260a9803SDavid Howells /* 1056260a9803SDavid Howells * handle dentry release 1057260a9803SDavid Howells */ 105866c7e1d3SDavid Howells void afs_d_release(struct dentry *dentry) 1059260a9803SDavid Howells { 1060a455589fSAl Viro _enter("%pd", dentry); 1061260a9803SDavid Howells } 1062260a9803SDavid Howells 1063260a9803SDavid Howells /* 1064d2ddc776SDavid Howells * Create a new inode for create/mkdir/symlink 1065d2ddc776SDavid Howells */ 1066d2ddc776SDavid Howells static void afs_vnode_new_inode(struct afs_fs_cursor *fc, 1067d2ddc776SDavid Howells struct dentry *new_dentry, 1068d2ddc776SDavid Howells struct afs_fid *newfid, 1069d2ddc776SDavid Howells struct afs_file_status *newstatus, 1070d2ddc776SDavid Howells struct afs_callback *newcb) 1071d2ddc776SDavid Howells { 10725a813276SDavid Howells struct afs_vnode *vnode; 1073d2ddc776SDavid Howells struct inode *inode; 1074d2ddc776SDavid Howells 1075d2ddc776SDavid Howells if (fc->ac.error < 0) 1076d2ddc776SDavid Howells return; 1077d2ddc776SDavid Howells 1078bc1527dcSDavid Howells d_drop(new_dentry); 1079bc1527dcSDavid Howells 1080d2ddc776SDavid Howells inode = afs_iget(fc->vnode->vfs_inode.i_sb, fc->key, 1081d2ddc776SDavid Howells newfid, newstatus, newcb, fc->cbi); 1082d2ddc776SDavid Howells if (IS_ERR(inode)) { 1083d2ddc776SDavid Howells /* ENOMEM or EINTR at a really inconvenient time - just abandon 1084d2ddc776SDavid Howells * the new directory on the server. 1085d2ddc776SDavid Howells */ 1086d2ddc776SDavid Howells fc->ac.error = PTR_ERR(inode); 1087d2ddc776SDavid Howells return; 1088d2ddc776SDavid Howells } 1089d2ddc776SDavid Howells 10905a813276SDavid Howells vnode = AFS_FS_I(inode); 10915a813276SDavid Howells set_bit(AFS_VNODE_NEW_CONTENT, &vnode->flags); 1092bc1527dcSDavid Howells d_add(new_dentry, inode); 1093d2ddc776SDavid Howells } 1094d2ddc776SDavid Howells 1095d2ddc776SDavid Howells /* 1096260a9803SDavid Howells * create a directory on an AFS filesystem 1097260a9803SDavid Howells */ 109818bb1db3SAl Viro static int afs_mkdir(struct inode *dir, struct dentry *dentry, umode_t mode) 1099260a9803SDavid Howells { 1100d2ddc776SDavid Howells struct afs_file_status newstatus; 1101d2ddc776SDavid Howells struct afs_fs_cursor fc; 1102d2ddc776SDavid Howells struct afs_callback newcb; 1103d2ddc776SDavid Howells struct afs_vnode *dvnode = AFS_FS_I(dir); 1104d2ddc776SDavid Howells struct afs_fid newfid; 1105260a9803SDavid Howells struct key *key; 110663a4681fSDavid Howells u64 data_version = dvnode->status.data_version; 1107260a9803SDavid Howells int ret; 1108260a9803SDavid Howells 1109d2ddc776SDavid Howells mode |= S_IFDIR; 1110260a9803SDavid Howells 11113b6492dfSDavid Howells _enter("{%llx:%llu},{%pd},%ho", 1112a455589fSAl Viro dvnode->fid.vid, dvnode->fid.vnode, dentry, mode); 1113260a9803SDavid Howells 1114260a9803SDavid Howells key = afs_request_key(dvnode->volume->cell); 1115260a9803SDavid Howells if (IS_ERR(key)) { 1116260a9803SDavid Howells ret = PTR_ERR(key); 1117260a9803SDavid Howells goto error; 1118260a9803SDavid Howells } 1119260a9803SDavid Howells 1120d2ddc776SDavid Howells ret = -ERESTARTSYS; 1121d2ddc776SDavid Howells if (afs_begin_vnode_operation(&fc, dvnode, key)) { 1122d2ddc776SDavid Howells while (afs_select_fileserver(&fc)) { 112368251f0aSDavid Howells fc.cb_break = afs_calc_vnode_cb_break(dvnode); 112463a4681fSDavid Howells afs_fs_create(&fc, dentry->d_name.name, mode, data_version, 1125d2ddc776SDavid Howells &newfid, &newstatus, &newcb); 1126d2ddc776SDavid Howells } 1127d2ddc776SDavid Howells 1128d2ddc776SDavid Howells afs_check_for_remote_deletion(&fc, fc.vnode); 1129d2ddc776SDavid Howells afs_vnode_commit_status(&fc, dvnode, fc.cb_break); 1130d2ddc776SDavid Howells afs_vnode_new_inode(&fc, dentry, &newfid, &newstatus, &newcb); 1131d2ddc776SDavid Howells ret = afs_end_vnode_operation(&fc); 1132260a9803SDavid Howells if (ret < 0) 1133d2ddc776SDavid Howells goto error_key; 11344433b691SDavid Howells } else { 11354433b691SDavid Howells goto error_key; 1136260a9803SDavid Howells } 1137260a9803SDavid Howells 113863a4681fSDavid Howells if (ret == 0 && 113963a4681fSDavid Howells test_bit(AFS_VNODE_DIR_VALID, &dvnode->flags)) 114063a4681fSDavid Howells afs_edit_dir_add(dvnode, &dentry->d_name, &newfid, 114163a4681fSDavid Howells afs_edit_dir_for_create); 114263a4681fSDavid Howells 1143260a9803SDavid Howells key_put(key); 1144260a9803SDavid Howells _leave(" = 0"); 1145260a9803SDavid Howells return 0; 1146260a9803SDavid Howells 1147d2ddc776SDavid Howells error_key: 1148260a9803SDavid Howells key_put(key); 1149260a9803SDavid Howells error: 1150260a9803SDavid Howells d_drop(dentry); 1151260a9803SDavid Howells _leave(" = %d", ret); 1152260a9803SDavid Howells return ret; 1153260a9803SDavid Howells } 1154260a9803SDavid Howells 1155260a9803SDavid Howells /* 1156d2ddc776SDavid Howells * Remove a subdir from a directory. 1157260a9803SDavid Howells */ 1158d2ddc776SDavid Howells static void afs_dir_remove_subdir(struct dentry *dentry) 1159260a9803SDavid Howells { 11602b0143b5SDavid Howells if (d_really_is_positive(dentry)) { 1161d2ddc776SDavid Howells struct afs_vnode *vnode = AFS_FS_I(d_inode(dentry)); 1162d2ddc776SDavid Howells 1163260a9803SDavid Howells clear_nlink(&vnode->vfs_inode); 1164260a9803SDavid Howells set_bit(AFS_VNODE_DELETED, &vnode->flags); 1165c435ee34SDavid Howells clear_bit(AFS_VNODE_CB_PROMISED, &vnode->flags); 116663a4681fSDavid Howells clear_bit(AFS_VNODE_DIR_VALID, &vnode->flags); 1167260a9803SDavid Howells } 1168260a9803SDavid Howells } 1169260a9803SDavid Howells 1170260a9803SDavid Howells /* 1171d2ddc776SDavid Howells * remove a directory from an AFS filesystem 1172260a9803SDavid Howells */ 1173d2ddc776SDavid Howells static int afs_rmdir(struct inode *dir, struct dentry *dentry) 1174260a9803SDavid Howells { 1175d2ddc776SDavid Howells struct afs_fs_cursor fc; 1176d2ddc776SDavid Howells struct afs_vnode *dvnode = AFS_FS_I(dir); 1177260a9803SDavid Howells struct key *key; 117863a4681fSDavid Howells u64 data_version = dvnode->status.data_version; 1179260a9803SDavid Howells int ret; 1180260a9803SDavid Howells 11813b6492dfSDavid Howells _enter("{%llx:%llu},{%pd}", 1182a455589fSAl Viro dvnode->fid.vid, dvnode->fid.vnode, dentry); 1183260a9803SDavid Howells 1184260a9803SDavid Howells key = afs_request_key(dvnode->volume->cell); 1185260a9803SDavid Howells if (IS_ERR(key)) { 1186260a9803SDavid Howells ret = PTR_ERR(key); 1187260a9803SDavid Howells goto error; 1188260a9803SDavid Howells } 1189260a9803SDavid Howells 1190d2ddc776SDavid Howells ret = -ERESTARTSYS; 1191d2ddc776SDavid Howells if (afs_begin_vnode_operation(&fc, dvnode, key)) { 1192d2ddc776SDavid Howells while (afs_select_fileserver(&fc)) { 119368251f0aSDavid Howells fc.cb_break = afs_calc_vnode_cb_break(dvnode); 119463a4681fSDavid Howells afs_fs_remove(&fc, dentry->d_name.name, true, 119563a4681fSDavid Howells data_version); 1196260a9803SDavid Howells } 1197260a9803SDavid Howells 1198d2ddc776SDavid Howells afs_vnode_commit_status(&fc, dvnode, fc.cb_break); 1199d2ddc776SDavid Howells ret = afs_end_vnode_operation(&fc); 120063a4681fSDavid Howells if (ret == 0) { 1201d2ddc776SDavid Howells afs_dir_remove_subdir(dentry); 120263a4681fSDavid Howells if (test_bit(AFS_VNODE_DIR_VALID, &dvnode->flags)) 120363a4681fSDavid Howells afs_edit_dir_remove(dvnode, &dentry->d_name, 120463a4681fSDavid Howells afs_edit_dir_for_rmdir); 120563a4681fSDavid Howells } 1206260a9803SDavid Howells } 1207260a9803SDavid Howells 1208260a9803SDavid Howells key_put(key); 1209d2ddc776SDavid Howells error: 1210d2ddc776SDavid Howells return ret; 1211d2ddc776SDavid Howells } 1212260a9803SDavid Howells 1213d2ddc776SDavid Howells /* 1214d2ddc776SDavid Howells * Remove a link to a file or symlink from a directory. 1215d2ddc776SDavid Howells * 1216d2ddc776SDavid Howells * If the file was not deleted due to excess hard links, the fileserver will 1217d2ddc776SDavid Howells * break the callback promise on the file - if it had one - before it returns 1218d2ddc776SDavid Howells * to us, and if it was deleted, it won't 1219d2ddc776SDavid Howells * 1220d2ddc776SDavid Howells * However, if we didn't have a callback promise outstanding, or it was 1221d2ddc776SDavid Howells * outstanding on a different server, then it won't break it either... 1222d2ddc776SDavid Howells */ 1223440fbc3aSDavid Howells static int afs_dir_remove_link(struct dentry *dentry, struct key *key, 1224440fbc3aSDavid Howells unsigned long d_version_before, 1225440fbc3aSDavid Howells unsigned long d_version_after) 1226d2ddc776SDavid Howells { 1227440fbc3aSDavid Howells bool dir_valid; 1228d2ddc776SDavid Howells int ret = 0; 1229d2ddc776SDavid Howells 1230440fbc3aSDavid Howells /* There were no intervening changes on the server if the version 1231440fbc3aSDavid Howells * number we got back was incremented by exactly 1. 1232440fbc3aSDavid Howells */ 1233440fbc3aSDavid Howells dir_valid = (d_version_after == d_version_before + 1); 1234440fbc3aSDavid Howells 1235d2ddc776SDavid Howells if (d_really_is_positive(dentry)) { 1236d2ddc776SDavid Howells struct afs_vnode *vnode = AFS_FS_I(d_inode(dentry)); 1237d2ddc776SDavid Howells 1238440fbc3aSDavid Howells if (dir_valid) { 1239440fbc3aSDavid Howells drop_nlink(&vnode->vfs_inode); 1240440fbc3aSDavid Howells if (vnode->vfs_inode.i_nlink == 0) { 1241440fbc3aSDavid Howells set_bit(AFS_VNODE_DELETED, &vnode->flags); 1242440fbc3aSDavid Howells clear_bit(AFS_VNODE_CB_PROMISED, &vnode->flags); 1243440fbc3aSDavid Howells } 1244440fbc3aSDavid Howells ret = 0; 1245440fbc3aSDavid Howells } else { 1246440fbc3aSDavid Howells clear_bit(AFS_VNODE_CB_PROMISED, &vnode->flags); 1247440fbc3aSDavid Howells 1248d2ddc776SDavid Howells if (test_bit(AFS_VNODE_DELETED, &vnode->flags)) 1249d2ddc776SDavid Howells kdebug("AFS_VNODE_DELETED"); 1250d2ddc776SDavid Howells 1251d2ddc776SDavid Howells ret = afs_validate(vnode, key); 1252d2ddc776SDavid Howells if (ret == -ESTALE) 1253d2ddc776SDavid Howells ret = 0; 1254440fbc3aSDavid Howells } 1255d2ddc776SDavid Howells _debug("nlink %d [val %d]", vnode->vfs_inode.i_nlink, ret); 1256d2ddc776SDavid Howells } 1257d2ddc776SDavid Howells 1258d2ddc776SDavid Howells return ret; 1259d2ddc776SDavid Howells } 1260d2ddc776SDavid Howells 1261d2ddc776SDavid Howells /* 1262d2ddc776SDavid Howells * Remove a file or symlink from an AFS filesystem. 1263d2ddc776SDavid Howells */ 1264d2ddc776SDavid Howells static int afs_unlink(struct inode *dir, struct dentry *dentry) 1265d2ddc776SDavid Howells { 1266d2ddc776SDavid Howells struct afs_fs_cursor fc; 1267d2ddc776SDavid Howells struct afs_vnode *dvnode = AFS_FS_I(dir), *vnode; 1268d2ddc776SDavid Howells struct key *key; 1269440fbc3aSDavid Howells unsigned long d_version = (unsigned long)dentry->d_fsdata; 127063a4681fSDavid Howells u64 data_version = dvnode->status.data_version; 1271d2ddc776SDavid Howells int ret; 1272d2ddc776SDavid Howells 12733b6492dfSDavid Howells _enter("{%llx:%llu},{%pd}", 1274d2ddc776SDavid Howells dvnode->fid.vid, dvnode->fid.vnode, dentry); 1275d2ddc776SDavid Howells 1276d2ddc776SDavid Howells if (dentry->d_name.len >= AFSNAMEMAX) 1277d2ddc776SDavid Howells return -ENAMETOOLONG; 1278d2ddc776SDavid Howells 1279d2ddc776SDavid Howells key = afs_request_key(dvnode->volume->cell); 1280d2ddc776SDavid Howells if (IS_ERR(key)) { 1281d2ddc776SDavid Howells ret = PTR_ERR(key); 1282d2ddc776SDavid Howells goto error; 1283d2ddc776SDavid Howells } 1284d2ddc776SDavid Howells 1285d2ddc776SDavid Howells /* Try to make sure we have a callback promise on the victim. */ 1286d2ddc776SDavid Howells if (d_really_is_positive(dentry)) { 1287d2ddc776SDavid Howells vnode = AFS_FS_I(d_inode(dentry)); 1288d2ddc776SDavid Howells ret = afs_validate(vnode, key); 1289d2ddc776SDavid Howells if (ret < 0) 1290d2ddc776SDavid Howells goto error_key; 1291d2ddc776SDavid Howells } 1292d2ddc776SDavid Howells 1293d2ddc776SDavid Howells ret = -ERESTARTSYS; 1294d2ddc776SDavid Howells if (afs_begin_vnode_operation(&fc, dvnode, key)) { 1295d2ddc776SDavid Howells while (afs_select_fileserver(&fc)) { 129668251f0aSDavid Howells fc.cb_break = afs_calc_vnode_cb_break(dvnode); 129763a4681fSDavid Howells afs_fs_remove(&fc, dentry->d_name.name, false, 129863a4681fSDavid Howells data_version); 1299d2ddc776SDavid Howells } 1300d2ddc776SDavid Howells 1301d2ddc776SDavid Howells afs_vnode_commit_status(&fc, dvnode, fc.cb_break); 1302d2ddc776SDavid Howells ret = afs_end_vnode_operation(&fc); 1303d2ddc776SDavid Howells if (ret == 0) 1304440fbc3aSDavid Howells ret = afs_dir_remove_link( 1305440fbc3aSDavid Howells dentry, key, d_version, 1306440fbc3aSDavid Howells (unsigned long)dvnode->status.data_version); 130763a4681fSDavid Howells if (ret == 0 && 130863a4681fSDavid Howells test_bit(AFS_VNODE_DIR_VALID, &dvnode->flags)) 130963a4681fSDavid Howells afs_edit_dir_remove(dvnode, &dentry->d_name, 131063a4681fSDavid Howells afs_edit_dir_for_unlink); 1311d2ddc776SDavid Howells } 1312d2ddc776SDavid Howells 1313d2ddc776SDavid Howells error_key: 1314260a9803SDavid Howells key_put(key); 1315260a9803SDavid Howells error: 1316260a9803SDavid Howells _leave(" = %d", ret); 1317260a9803SDavid Howells return ret; 1318260a9803SDavid Howells } 1319260a9803SDavid Howells 1320260a9803SDavid Howells /* 1321260a9803SDavid Howells * create a regular file on an AFS filesystem 1322260a9803SDavid Howells */ 13234acdaf27SAl Viro static int afs_create(struct inode *dir, struct dentry *dentry, umode_t mode, 1324ebfc3b49SAl Viro bool excl) 1325260a9803SDavid Howells { 1326d2ddc776SDavid Howells struct afs_fs_cursor fc; 1327d2ddc776SDavid Howells struct afs_file_status newstatus; 1328d2ddc776SDavid Howells struct afs_callback newcb; 132943dd388bSColin Ian King struct afs_vnode *dvnode = AFS_FS_I(dir); 1330d2ddc776SDavid Howells struct afs_fid newfid; 1331260a9803SDavid Howells struct key *key; 133263a4681fSDavid Howells u64 data_version = dvnode->status.data_version; 1333260a9803SDavid Howells int ret; 1334260a9803SDavid Howells 1335d2ddc776SDavid Howells mode |= S_IFREG; 1336260a9803SDavid Howells 13373b6492dfSDavid Howells _enter("{%llx:%llu},{%pd},%ho,", 1338a455589fSAl Viro dvnode->fid.vid, dvnode->fid.vnode, dentry, mode); 1339260a9803SDavid Howells 1340d2ddc776SDavid Howells ret = -ENAMETOOLONG; 1341d2ddc776SDavid Howells if (dentry->d_name.len >= AFSNAMEMAX) 1342d2ddc776SDavid Howells goto error; 1343d2ddc776SDavid Howells 1344260a9803SDavid Howells key = afs_request_key(dvnode->volume->cell); 1345260a9803SDavid Howells if (IS_ERR(key)) { 1346260a9803SDavid Howells ret = PTR_ERR(key); 1347260a9803SDavid Howells goto error; 1348260a9803SDavid Howells } 1349260a9803SDavid Howells 1350d2ddc776SDavid Howells ret = -ERESTARTSYS; 1351d2ddc776SDavid Howells if (afs_begin_vnode_operation(&fc, dvnode, key)) { 1352d2ddc776SDavid Howells while (afs_select_fileserver(&fc)) { 135368251f0aSDavid Howells fc.cb_break = afs_calc_vnode_cb_break(dvnode); 135463a4681fSDavid Howells afs_fs_create(&fc, dentry->d_name.name, mode, data_version, 1355d2ddc776SDavid Howells &newfid, &newstatus, &newcb); 1356d2ddc776SDavid Howells } 1357d2ddc776SDavid Howells 1358d2ddc776SDavid Howells afs_check_for_remote_deletion(&fc, fc.vnode); 1359d2ddc776SDavid Howells afs_vnode_commit_status(&fc, dvnode, fc.cb_break); 1360d2ddc776SDavid Howells afs_vnode_new_inode(&fc, dentry, &newfid, &newstatus, &newcb); 1361d2ddc776SDavid Howells ret = afs_end_vnode_operation(&fc); 1362260a9803SDavid Howells if (ret < 0) 1363d2ddc776SDavid Howells goto error_key; 13644433b691SDavid Howells } else { 13654433b691SDavid Howells goto error_key; 1366260a9803SDavid Howells } 1367260a9803SDavid Howells 136863a4681fSDavid Howells if (test_bit(AFS_VNODE_DIR_VALID, &dvnode->flags)) 136963a4681fSDavid Howells afs_edit_dir_add(dvnode, &dentry->d_name, &newfid, 137063a4681fSDavid Howells afs_edit_dir_for_create); 137163a4681fSDavid Howells 1372260a9803SDavid Howells key_put(key); 1373260a9803SDavid Howells _leave(" = 0"); 1374260a9803SDavid Howells return 0; 1375260a9803SDavid Howells 1376d2ddc776SDavid Howells error_key: 1377260a9803SDavid Howells key_put(key); 1378260a9803SDavid Howells error: 1379260a9803SDavid Howells d_drop(dentry); 1380260a9803SDavid Howells _leave(" = %d", ret); 1381260a9803SDavid Howells return ret; 1382260a9803SDavid Howells } 1383260a9803SDavid Howells 1384260a9803SDavid Howells /* 1385260a9803SDavid Howells * create a hard link between files in an AFS filesystem 1386260a9803SDavid Howells */ 1387260a9803SDavid Howells static int afs_link(struct dentry *from, struct inode *dir, 1388260a9803SDavid Howells struct dentry *dentry) 1389260a9803SDavid Howells { 1390d2ddc776SDavid Howells struct afs_fs_cursor fc; 1391260a9803SDavid Howells struct afs_vnode *dvnode, *vnode; 1392260a9803SDavid Howells struct key *key; 139363a4681fSDavid Howells u64 data_version; 1394260a9803SDavid Howells int ret; 1395260a9803SDavid Howells 13962b0143b5SDavid Howells vnode = AFS_FS_I(d_inode(from)); 1397260a9803SDavid Howells dvnode = AFS_FS_I(dir); 139863a4681fSDavid Howells data_version = dvnode->status.data_version; 1399260a9803SDavid Howells 14003b6492dfSDavid Howells _enter("{%llx:%llu},{%llx:%llu},{%pd}", 1401260a9803SDavid Howells vnode->fid.vid, vnode->fid.vnode, 1402260a9803SDavid Howells dvnode->fid.vid, dvnode->fid.vnode, 1403a455589fSAl Viro dentry); 1404260a9803SDavid Howells 1405d2ddc776SDavid Howells ret = -ENAMETOOLONG; 1406d2ddc776SDavid Howells if (dentry->d_name.len >= AFSNAMEMAX) 1407d2ddc776SDavid Howells goto error; 1408d2ddc776SDavid Howells 1409260a9803SDavid Howells key = afs_request_key(dvnode->volume->cell); 1410260a9803SDavid Howells if (IS_ERR(key)) { 1411260a9803SDavid Howells ret = PTR_ERR(key); 1412260a9803SDavid Howells goto error; 1413260a9803SDavid Howells } 1414260a9803SDavid Howells 1415d2ddc776SDavid Howells ret = -ERESTARTSYS; 1416d2ddc776SDavid Howells if (afs_begin_vnode_operation(&fc, dvnode, key)) { 1417d2ddc776SDavid Howells if (mutex_lock_interruptible_nested(&vnode->io_lock, 1) < 0) { 1418d2ddc776SDavid Howells afs_end_vnode_operation(&fc); 1419bc1527dcSDavid Howells goto error_key; 1420d2ddc776SDavid Howells } 1421260a9803SDavid Howells 1422d2ddc776SDavid Howells while (afs_select_fileserver(&fc)) { 142368251f0aSDavid Howells fc.cb_break = afs_calc_vnode_cb_break(dvnode); 142468251f0aSDavid Howells fc.cb_break_2 = afs_calc_vnode_cb_break(vnode); 142563a4681fSDavid Howells afs_fs_link(&fc, vnode, dentry->d_name.name, data_version); 1426d2ddc776SDavid Howells } 1427d2ddc776SDavid Howells 1428d2ddc776SDavid Howells afs_vnode_commit_status(&fc, dvnode, fc.cb_break); 1429d2ddc776SDavid Howells afs_vnode_commit_status(&fc, vnode, fc.cb_break_2); 14307de9c6eeSAl Viro ihold(&vnode->vfs_inode); 1431260a9803SDavid Howells d_instantiate(dentry, &vnode->vfs_inode); 1432d2ddc776SDavid Howells 1433d2ddc776SDavid Howells mutex_unlock(&vnode->io_lock); 1434d2ddc776SDavid Howells ret = afs_end_vnode_operation(&fc); 1435d2ddc776SDavid Howells if (ret < 0) 1436d2ddc776SDavid Howells goto error_key; 14374433b691SDavid Howells } else { 14384433b691SDavid Howells goto error_key; 1439d2ddc776SDavid Howells } 1440d2ddc776SDavid Howells 144163a4681fSDavid Howells if (test_bit(AFS_VNODE_DIR_VALID, &dvnode->flags)) 144263a4681fSDavid Howells afs_edit_dir_add(dvnode, &dentry->d_name, &vnode->fid, 144363a4681fSDavid Howells afs_edit_dir_for_link); 144463a4681fSDavid Howells 1445260a9803SDavid Howells key_put(key); 1446260a9803SDavid Howells _leave(" = 0"); 1447260a9803SDavid Howells return 0; 1448260a9803SDavid Howells 1449d2ddc776SDavid Howells error_key: 1450260a9803SDavid Howells key_put(key); 1451260a9803SDavid Howells error: 1452260a9803SDavid Howells d_drop(dentry); 1453260a9803SDavid Howells _leave(" = %d", ret); 1454260a9803SDavid Howells return ret; 1455260a9803SDavid Howells } 1456260a9803SDavid Howells 1457260a9803SDavid Howells /* 1458260a9803SDavid Howells * create a symlink in an AFS filesystem 1459260a9803SDavid Howells */ 1460260a9803SDavid Howells static int afs_symlink(struct inode *dir, struct dentry *dentry, 1461260a9803SDavid Howells const char *content) 1462260a9803SDavid Howells { 1463d2ddc776SDavid Howells struct afs_fs_cursor fc; 1464d2ddc776SDavid Howells struct afs_file_status newstatus; 1465d2ddc776SDavid Howells struct afs_vnode *dvnode = AFS_FS_I(dir); 1466d2ddc776SDavid Howells struct afs_fid newfid; 1467260a9803SDavid Howells struct key *key; 146863a4681fSDavid Howells u64 data_version = dvnode->status.data_version; 1469260a9803SDavid Howells int ret; 1470260a9803SDavid Howells 14713b6492dfSDavid Howells _enter("{%llx:%llu},{%pd},%s", 1472a455589fSAl Viro dvnode->fid.vid, dvnode->fid.vnode, dentry, 1473260a9803SDavid Howells content); 1474260a9803SDavid Howells 1475d2ddc776SDavid Howells ret = -ENAMETOOLONG; 1476d2ddc776SDavid Howells if (dentry->d_name.len >= AFSNAMEMAX) 1477d2ddc776SDavid Howells goto error; 1478d2ddc776SDavid Howells 1479260a9803SDavid Howells ret = -EINVAL; 148045222b9eSDavid Howells if (strlen(content) >= AFSPATHMAX) 1481260a9803SDavid Howells goto error; 1482260a9803SDavid Howells 1483260a9803SDavid Howells key = afs_request_key(dvnode->volume->cell); 1484260a9803SDavid Howells if (IS_ERR(key)) { 1485260a9803SDavid Howells ret = PTR_ERR(key); 1486260a9803SDavid Howells goto error; 1487260a9803SDavid Howells } 1488260a9803SDavid Howells 1489d2ddc776SDavid Howells ret = -ERESTARTSYS; 1490d2ddc776SDavid Howells if (afs_begin_vnode_operation(&fc, dvnode, key)) { 1491d2ddc776SDavid Howells while (afs_select_fileserver(&fc)) { 149268251f0aSDavid Howells fc.cb_break = afs_calc_vnode_cb_break(dvnode); 149363a4681fSDavid Howells afs_fs_symlink(&fc, dentry->d_name.name, 149463a4681fSDavid Howells content, data_version, 1495d2ddc776SDavid Howells &newfid, &newstatus); 1496d2ddc776SDavid Howells } 1497d2ddc776SDavid Howells 1498d2ddc776SDavid Howells afs_check_for_remote_deletion(&fc, fc.vnode); 1499d2ddc776SDavid Howells afs_vnode_commit_status(&fc, dvnode, fc.cb_break); 1500d2ddc776SDavid Howells afs_vnode_new_inode(&fc, dentry, &newfid, &newstatus, NULL); 1501d2ddc776SDavid Howells ret = afs_end_vnode_operation(&fc); 1502260a9803SDavid Howells if (ret < 0) 1503d2ddc776SDavid Howells goto error_key; 15044433b691SDavid Howells } else { 15054433b691SDavid Howells goto error_key; 1506260a9803SDavid Howells } 1507260a9803SDavid Howells 150863a4681fSDavid Howells if (test_bit(AFS_VNODE_DIR_VALID, &dvnode->flags)) 150963a4681fSDavid Howells afs_edit_dir_add(dvnode, &dentry->d_name, &newfid, 151063a4681fSDavid Howells afs_edit_dir_for_symlink); 151163a4681fSDavid Howells 1512260a9803SDavid Howells key_put(key); 1513260a9803SDavid Howells _leave(" = 0"); 1514260a9803SDavid Howells return 0; 1515260a9803SDavid Howells 1516d2ddc776SDavid Howells error_key: 1517260a9803SDavid Howells key_put(key); 1518260a9803SDavid Howells error: 1519260a9803SDavid Howells d_drop(dentry); 1520260a9803SDavid Howells _leave(" = %d", ret); 1521260a9803SDavid Howells return ret; 1522260a9803SDavid Howells } 1523260a9803SDavid Howells 1524260a9803SDavid Howells /* 1525260a9803SDavid Howells * rename a file in an AFS filesystem and/or move it between directories 1526260a9803SDavid Howells */ 1527260a9803SDavid Howells static int afs_rename(struct inode *old_dir, struct dentry *old_dentry, 15281cd66c93SMiklos Szeredi struct inode *new_dir, struct dentry *new_dentry, 15291cd66c93SMiklos Szeredi unsigned int flags) 1530260a9803SDavid Howells { 1531d2ddc776SDavid Howells struct afs_fs_cursor fc; 1532260a9803SDavid Howells struct afs_vnode *orig_dvnode, *new_dvnode, *vnode; 1533260a9803SDavid Howells struct key *key; 153463a4681fSDavid Howells u64 orig_data_version, new_data_version; 153563a4681fSDavid Howells bool new_negative = d_is_negative(new_dentry); 1536260a9803SDavid Howells int ret; 1537260a9803SDavid Howells 15381cd66c93SMiklos Szeredi if (flags) 15391cd66c93SMiklos Szeredi return -EINVAL; 15401cd66c93SMiklos Szeredi 15412b0143b5SDavid Howells vnode = AFS_FS_I(d_inode(old_dentry)); 1542260a9803SDavid Howells orig_dvnode = AFS_FS_I(old_dir); 1543260a9803SDavid Howells new_dvnode = AFS_FS_I(new_dir); 154463a4681fSDavid Howells orig_data_version = orig_dvnode->status.data_version; 154563a4681fSDavid Howells new_data_version = new_dvnode->status.data_version; 1546260a9803SDavid Howells 15473b6492dfSDavid Howells _enter("{%llx:%llu},{%llx:%llu},{%llx:%llu},{%pd}", 1548260a9803SDavid Howells orig_dvnode->fid.vid, orig_dvnode->fid.vnode, 1549260a9803SDavid Howells vnode->fid.vid, vnode->fid.vnode, 1550260a9803SDavid Howells new_dvnode->fid.vid, new_dvnode->fid.vnode, 1551a455589fSAl Viro new_dentry); 1552260a9803SDavid Howells 1553260a9803SDavid Howells key = afs_request_key(orig_dvnode->volume->cell); 1554260a9803SDavid Howells if (IS_ERR(key)) { 1555260a9803SDavid Howells ret = PTR_ERR(key); 1556260a9803SDavid Howells goto error; 1557260a9803SDavid Howells } 1558260a9803SDavid Howells 1559d2ddc776SDavid Howells ret = -ERESTARTSYS; 1560d2ddc776SDavid Howells if (afs_begin_vnode_operation(&fc, orig_dvnode, key)) { 1561d2ddc776SDavid Howells if (orig_dvnode != new_dvnode) { 1562d2ddc776SDavid Howells if (mutex_lock_interruptible_nested(&new_dvnode->io_lock, 1) < 0) { 1563d2ddc776SDavid Howells afs_end_vnode_operation(&fc); 1564bc1527dcSDavid Howells goto error_key; 1565d2ddc776SDavid Howells } 1566d2ddc776SDavid Howells } 1567d2ddc776SDavid Howells while (afs_select_fileserver(&fc)) { 156868251f0aSDavid Howells fc.cb_break = afs_calc_vnode_cb_break(orig_dvnode); 156968251f0aSDavid Howells fc.cb_break_2 = afs_calc_vnode_cb_break(new_dvnode); 1570d2ddc776SDavid Howells afs_fs_rename(&fc, old_dentry->d_name.name, 157163a4681fSDavid Howells new_dvnode, new_dentry->d_name.name, 157263a4681fSDavid Howells orig_data_version, new_data_version); 1573d2ddc776SDavid Howells } 1574d2ddc776SDavid Howells 1575d2ddc776SDavid Howells afs_vnode_commit_status(&fc, orig_dvnode, fc.cb_break); 1576d2ddc776SDavid Howells afs_vnode_commit_status(&fc, new_dvnode, fc.cb_break_2); 1577d2ddc776SDavid Howells if (orig_dvnode != new_dvnode) 1578d2ddc776SDavid Howells mutex_unlock(&new_dvnode->io_lock); 1579d2ddc776SDavid Howells ret = afs_end_vnode_operation(&fc); 1580260a9803SDavid Howells if (ret < 0) 1581d2ddc776SDavid Howells goto error_key; 1582d2ddc776SDavid Howells } 1583d2ddc776SDavid Howells 158463a4681fSDavid Howells if (ret == 0) { 158563a4681fSDavid Howells if (test_bit(AFS_VNODE_DIR_VALID, &orig_dvnode->flags)) 158663a4681fSDavid Howells afs_edit_dir_remove(orig_dvnode, &old_dentry->d_name, 158763a4681fSDavid Howells afs_edit_dir_for_rename); 158863a4681fSDavid Howells 158963a4681fSDavid Howells if (!new_negative && 159063a4681fSDavid Howells test_bit(AFS_VNODE_DIR_VALID, &new_dvnode->flags)) 159163a4681fSDavid Howells afs_edit_dir_remove(new_dvnode, &new_dentry->d_name, 159263a4681fSDavid Howells afs_edit_dir_for_rename); 159363a4681fSDavid Howells 159463a4681fSDavid Howells if (test_bit(AFS_VNODE_DIR_VALID, &new_dvnode->flags)) 159563a4681fSDavid Howells afs_edit_dir_add(new_dvnode, &new_dentry->d_name, 159663a4681fSDavid Howells &vnode->fid, afs_edit_dir_for_rename); 159763a4681fSDavid Howells } 159863a4681fSDavid Howells 1599d2ddc776SDavid Howells error_key: 1600260a9803SDavid Howells key_put(key); 1601260a9803SDavid Howells error: 1602260a9803SDavid Howells _leave(" = %d", ret); 1603260a9803SDavid Howells return ret; 1604260a9803SDavid Howells } 1605f3ddee8dSDavid Howells 1606f3ddee8dSDavid Howells /* 1607f3ddee8dSDavid Howells * Release a directory page and clean up its private state if it's not busy 1608f3ddee8dSDavid Howells * - return true if the page can now be released, false if not 1609f3ddee8dSDavid Howells */ 1610f3ddee8dSDavid Howells static int afs_dir_releasepage(struct page *page, gfp_t gfp_flags) 1611f3ddee8dSDavid Howells { 1612f3ddee8dSDavid Howells struct afs_vnode *dvnode = AFS_FS_I(page->mapping->host); 1613f3ddee8dSDavid Howells 16143b6492dfSDavid Howells _enter("{{%llx:%llu}[%lu]}", dvnode->fid.vid, dvnode->fid.vnode, page->index); 1615f3ddee8dSDavid Howells 1616f3ddee8dSDavid Howells set_page_private(page, 0); 1617f3ddee8dSDavid Howells ClearPagePrivate(page); 1618f3ddee8dSDavid Howells 1619f3ddee8dSDavid Howells /* The directory will need reloading. */ 1620f3ddee8dSDavid Howells if (test_and_clear_bit(AFS_VNODE_DIR_VALID, &dvnode->flags)) 1621f3ddee8dSDavid Howells afs_stat_v(dvnode, n_relpg); 1622f3ddee8dSDavid Howells return 1; 1623f3ddee8dSDavid Howells } 1624f3ddee8dSDavid Howells 1625f3ddee8dSDavid Howells /* 1626f3ddee8dSDavid Howells * invalidate part or all of a page 1627f3ddee8dSDavid Howells * - release a page and clean up its private data if offset is 0 (indicating 1628f3ddee8dSDavid Howells * the entire page) 1629f3ddee8dSDavid Howells */ 1630f3ddee8dSDavid Howells static void afs_dir_invalidatepage(struct page *page, unsigned int offset, 1631f3ddee8dSDavid Howells unsigned int length) 1632f3ddee8dSDavid Howells { 1633f3ddee8dSDavid Howells struct afs_vnode *dvnode = AFS_FS_I(page->mapping->host); 1634f3ddee8dSDavid Howells 1635f3ddee8dSDavid Howells _enter("{%lu},%u,%u", page->index, offset, length); 1636f3ddee8dSDavid Howells 1637f3ddee8dSDavid Howells BUG_ON(!PageLocked(page)); 1638f3ddee8dSDavid Howells 1639f3ddee8dSDavid Howells /* The directory will need reloading. */ 1640f3ddee8dSDavid Howells if (test_and_clear_bit(AFS_VNODE_DIR_VALID, &dvnode->flags)) 1641f3ddee8dSDavid Howells afs_stat_v(dvnode, n_inval); 1642f3ddee8dSDavid Howells 1643f3ddee8dSDavid Howells /* we clean up only if the entire page is being invalidated */ 1644f3ddee8dSDavid Howells if (offset == 0 && length == PAGE_SIZE) { 1645f3ddee8dSDavid Howells set_page_private(page, 0); 1646f3ddee8dSDavid Howells ClearPagePrivate(page); 1647f3ddee8dSDavid Howells } 1648f3ddee8dSDavid Howells } 1649