diff options
Diffstat (limited to 'fs')
75 files changed, 1187 insertions, 1017 deletions
diff --git a/fs/afs/dir.c b/fs/afs/dir.c index c14533ef108f..b5b8de521f99 100644 --- a/fs/afs/dir.c +++ b/fs/afs/dir.c @@ -124,7 +124,7 @@ static void afs_dir_read_cleanup(struct afs_read *req) if (xas_retry(&xas, folio)) continue; BUG_ON(xa_is_value(folio)); - ASSERTCMP(folio_file_mapping(folio), ==, mapping); + ASSERTCMP(folio->mapping, ==, mapping); folio_put(folio); } @@ -202,12 +202,12 @@ static void afs_dir_dump(struct afs_vnode *dvnode, struct afs_read *req) if (xas_retry(&xas, folio)) continue; - BUG_ON(folio_file_mapping(folio) != mapping); + BUG_ON(folio->mapping != mapping); size = min_t(loff_t, folio_size(folio), req->actual_len - folio_pos(folio)); for (offset = 0; offset < size; offset += sizeof(*block)) { block = kmap_local_folio(folio, offset); - pr_warn("[%02lx] %32phN\n", folio_index(folio) + offset, block); + pr_warn("[%02lx] %32phN\n", folio->index + offset, block); kunmap_local(block); } } @@ -233,7 +233,7 @@ static int afs_dir_check(struct afs_vnode *dvnode, struct afs_read *req) if (xas_retry(&xas, folio)) continue; - BUG_ON(folio_file_mapping(folio) != mapping); + BUG_ON(folio->mapping != mapping); if (!afs_dir_check_folio(dvnode, folio, req->actual_len)) { afs_dir_dump(dvnode, req); @@ -474,6 +474,14 @@ static int afs_dir_iterate_block(struct afs_vnode *dvnode, continue; } + /* Don't expose silly rename entries to userspace. */ + if (nlen > 6 && + dire->u.name[0] == '.' && + ctx->actor != afs_lookup_filldir && + ctx->actor != afs_lookup_one_filldir && + memcmp(dire->u.name, ".__afs", 6) == 0) + continue; + /* found the next entry */ if (!dir_emit(ctx, dire->u.name, nlen, ntohl(dire->u.vnode), @@ -708,6 +716,8 @@ static void afs_do_lookup_success(struct afs_operation *op) break; } + if (vp->scb.status.abort_code) + trace_afs_bulkstat_error(op, &vp->fid, i, vp->scb.status.abort_code); if (!vp->scb.have_status && !vp->scb.have_error) continue; @@ -897,12 +907,16 @@ static struct inode *afs_do_lookup(struct inode *dir, struct dentry *dentry, afs_begin_vnode_operation(op); afs_wait_for_operation(op); } - inode = ERR_PTR(afs_op_error(op)); out_op: if (!afs_op_error(op)) { - inode = &op->file[1].vnode->netfs.inode; - op->file[1].vnode = NULL; + if (op->file[1].scb.status.abort_code) { + afs_op_accumulate_error(op, -ECONNABORTED, + op->file[1].scb.status.abort_code); + } else { + inode = &op->file[1].vnode->netfs.inode; + op->file[1].vnode = NULL; + } } if (op->file[0].scb.have_status) @@ -2022,7 +2036,7 @@ static bool afs_dir_release_folio(struct folio *folio, gfp_t gfp_flags) { struct afs_vnode *dvnode = AFS_FS_I(folio_inode(folio)); - _enter("{{%llx:%llu}[%lu]}", dvnode->fid.vid, dvnode->fid.vnode, folio_index(folio)); + _enter("{{%llx:%llu}[%lu]}", dvnode->fid.vid, dvnode->fid.vnode, folio->index); folio_detach_private(folio); diff --git a/fs/afs/dynroot.c b/fs/afs/dynroot.c index d3bc4a2d7085..c4d2711e20ad 100644 --- a/fs/afs/dynroot.c +++ b/fs/afs/dynroot.c @@ -258,16 +258,7 @@ const struct inode_operations afs_dynroot_inode_operations = { .lookup = afs_dynroot_lookup, }; -/* - * Dirs in the dynamic root don't need revalidation. - */ -static int afs_dynroot_d_revalidate(struct dentry *dentry, unsigned int flags) -{ - return 1; -} - const struct dentry_operations afs_dynroot_dentry_operations = { - .d_revalidate = afs_dynroot_d_revalidate, .d_delete = always_delete_dentry, .d_release = afs_d_release, .d_automount = afs_d_automount, diff --git a/fs/afs/proc.c b/fs/afs/proc.c index 3bd02571f30d..15eab053af6d 100644 --- a/fs/afs/proc.c +++ b/fs/afs/proc.c @@ -166,7 +166,7 @@ static int afs_proc_addr_prefs_show(struct seq_file *m, void *v) if (!preflist) { seq_puts(m, "NO PREFS\n"); - return 0; + goto out; } seq_printf(m, "PROT SUBNET PRIOR (v=%u n=%u/%u/%u)\n", @@ -191,7 +191,8 @@ static int afs_proc_addr_prefs_show(struct seq_file *m, void *v) } } - rcu_read_lock(); +out: + rcu_read_unlock(); return 0; } diff --git a/fs/bcachefs/alloc_background.c b/fs/bcachefs/alloc_background.c index 10704f2d3af5..fd3e175d8342 100644 --- a/fs/bcachefs/alloc_background.c +++ b/fs/bcachefs/alloc_background.c @@ -1715,7 +1715,7 @@ static int bch2_discard_one_bucket(struct btree_trans *trans, * This works without any other locks because this is the only * thread that removes items from the need_discard tree */ - bch2_trans_unlock(trans); + bch2_trans_unlock_long(trans); blkdev_issue_discard(ca->disk_sb.bdev, k.k->p.offset * ca->mi.bucket_size, ca->mi.bucket_size, diff --git a/fs/bcachefs/btree_locking.c b/fs/bcachefs/btree_locking.c index bed75c93c069..684397442338 100644 --- a/fs/bcachefs/btree_locking.c +++ b/fs/bcachefs/btree_locking.c @@ -92,7 +92,7 @@ static noinline void print_cycle(struct printbuf *out, struct lock_graph *g) continue; bch2_btree_trans_to_text(out, i->trans); - bch2_prt_task_backtrace(out, task, i == g->g ? 5 : 1); + bch2_prt_task_backtrace(out, task, i == g->g ? 5 : 1, GFP_NOWAIT); } } @@ -227,7 +227,7 @@ static noinline int break_cycle(struct lock_graph *g, struct printbuf *cycle) prt_printf(&buf, "backtrace:"); prt_newline(&buf); printbuf_indent_add(&buf, 2); - bch2_prt_task_backtrace(&buf, trans->locking_wait.task, 2); + bch2_prt_task_backtrace(&buf, trans->locking_wait.task, 2, GFP_NOWAIT); printbuf_indent_sub(&buf, 2); prt_newline(&buf); } diff --git a/fs/bcachefs/debug.c b/fs/bcachefs/debug.c index cadda9bbe4a4..7bdba8507fc9 100644 --- a/fs/bcachefs/debug.c +++ b/fs/bcachefs/debug.c @@ -627,7 +627,7 @@ restart: prt_printf(&i->buf, "backtrace:"); prt_newline(&i->buf); printbuf_indent_add(&i->buf, 2); - bch2_prt_task_backtrace(&i->buf, task, 0); + bch2_prt_task_backtrace(&i->buf, task, 0, GFP_KERNEL); printbuf_indent_sub(&i->buf, 2); prt_newline(&i->buf); diff --git a/fs/bcachefs/fs-io.c b/fs/bcachefs/fs-io.c index dc52918d06ef..8c70123b6a0c 100644 --- a/fs/bcachefs/fs-io.c +++ b/fs/bcachefs/fs-io.c @@ -79,7 +79,7 @@ void bch2_inode_flush_nocow_writes_async(struct bch_fs *c, continue; bio = container_of(bio_alloc_bioset(ca->disk_sb.bdev, 0, - REQ_OP_FLUSH, + REQ_OP_WRITE|REQ_PREFLUSH, GFP_KERNEL, &c->nocow_flush_bioset), struct nocow_flush, bio); diff --git a/fs/bcachefs/fsck.c b/fs/bcachefs/fsck.c index 4f0ecd605675..6a760777bafb 100644 --- a/fs/bcachefs/fsck.c +++ b/fs/bcachefs/fsck.c @@ -119,22 +119,19 @@ static int lookup_inode(struct btree_trans *trans, u64 inode_nr, if (!ret) *snapshot = iter.pos.snapshot; err: - bch_err_msg(trans->c, ret, "fetching inode %llu:%u", inode_nr, *snapshot); bch2_trans_iter_exit(trans, &iter); return ret; } -static int __lookup_dirent(struct btree_trans *trans, +static int lookup_dirent_in_snapshot(struct btree_trans *trans, struct bch_hash_info hash_info, subvol_inum dir, struct qstr *name, - u64 *target, unsigned *type) + u64 *target, unsigned *type, u32 snapshot) { struct btree_iter iter; struct bkey_s_c_dirent d; - int ret; - - ret = bch2_hash_lookup(trans, &iter, bch2_dirent_hash_desc, - &hash_info, dir, name, 0); + int ret = bch2_hash_lookup_in_snapshot(trans, &iter, bch2_dirent_hash_desc, + &hash_info, dir, name, 0, snapshot); if (ret) return ret; @@ -225,15 +222,16 @@ static int lookup_lostfound(struct btree_trans *trans, u32 snapshot, struct bch_inode_unpacked root_inode; struct bch_hash_info root_hash_info; - ret = lookup_inode(trans, root_inum.inum, &root_inode, &snapshot); + u32 root_inode_snapshot = snapshot; + ret = lookup_inode(trans, root_inum.inum, &root_inode, &root_inode_snapshot); bch_err_msg(c, ret, "looking up root inode"); if (ret) return ret; root_hash_info = bch2_hash_info_init(c, &root_inode); - ret = __lookup_dirent(trans, root_hash_info, root_inum, - &lostfound_str, &inum, &d_type); + ret = lookup_dirent_in_snapshot(trans, root_hash_info, root_inum, + &lostfound_str, &inum, &d_type, snapshot); if (bch2_err_matches(ret, ENOENT)) goto create_lostfound; @@ -250,7 +248,10 @@ static int lookup_lostfound(struct btree_trans *trans, u32 snapshot, * The bch2_check_dirents pass has already run, dangling dirents * shouldn't exist here: */ - return lookup_inode(trans, inum, lostfound, &snapshot); + ret = lookup_inode(trans, inum, lostfound, &snapshot); + bch_err_msg(c, ret, "looking up lost+found %llu:%u in (root inode %llu, snapshot root %u)", + inum, snapshot, root_inum.inum, bch2_snapshot_root(c, snapshot)); + return ret; create_lostfound: /* diff --git a/fs/bcachefs/journal.c b/fs/bcachefs/journal.c index d71d26e39521..bc890776eb57 100644 --- a/fs/bcachefs/journal.c +++ b/fs/bcachefs/journal.c @@ -233,7 +233,7 @@ static void __journal_entry_close(struct journal *j, unsigned closed_val, bool t prt_str(&pbuf, "entry size: "); prt_human_readable_u64(&pbuf, vstruct_bytes(buf->data)); prt_newline(&pbuf); - bch2_prt_task_backtrace(&pbuf, current, 1); + bch2_prt_task_backtrace(&pbuf, current, 1, GFP_NOWAIT); trace_journal_entry_close(c, pbuf.buf); printbuf_exit(&pbuf); } diff --git a/fs/bcachefs/journal_io.c b/fs/bcachefs/journal_io.c index 04a1e79a5ed3..bfd6585e746d 100644 --- a/fs/bcachefs/journal_io.c +++ b/fs/bcachefs/journal_io.c @@ -1988,7 +1988,8 @@ CLOSURE_CALLBACK(bch2_journal_write) percpu_ref_get(&ca->io_ref); bio = ca->journal.bio; - bio_reset(bio, ca->disk_sb.bdev, REQ_OP_FLUSH); + bio_reset(bio, ca->disk_sb.bdev, + REQ_OP_WRITE|REQ_PREFLUSH); bio->bi_end_io = journal_write_endio; bio->bi_private = ca; closure_bio_submit(bio, cl); diff --git a/fs/bcachefs/str_hash.h b/fs/bcachefs/str_hash.h index 89fdb7c21134..fcaa5a888744 100644 --- a/fs/bcachefs/str_hash.h +++ b/fs/bcachefs/str_hash.h @@ -160,21 +160,16 @@ static inline bool is_visible_key(struct bch_hash_desc desc, subvol_inum inum, s } static __always_inline int -bch2_hash_lookup(struct btree_trans *trans, +bch2_hash_lookup_in_snapshot(struct btree_trans *trans, struct btree_iter *iter, const struct bch_hash_desc desc, const struct bch_hash_info *info, subvol_inum inum, const void *key, - unsigned flags) + unsigned flags, u32 snapshot) { struct bkey_s_c k; - u32 snapshot; int ret; - ret = bch2_subvolume_get_snapshot(trans, inum.subvol, &snapshot); - if (ret) - return ret; - for_each_btree_key_upto_norestart(trans, *iter, desc.btree_id, SPOS(inum.inum, desc.hash_key(info, key), snapshot), POS(inum.inum, U64_MAX), @@ -195,6 +190,19 @@ bch2_hash_lookup(struct btree_trans *trans, } static __always_inline int +bch2_hash_lookup(struct btree_trans *trans, + struct btree_iter *iter, + const struct bch_hash_desc desc, + const struct bch_hash_info *info, + subvol_inum inum, const void *key, + unsigned flags) +{ + u32 snapshot; + return bch2_subvolume_get_snapshot(trans, inum.subvol, &snapshot) ?: + bch2_hash_lookup_in_snapshot(trans, iter, desc, info, inum, key, flags, snapshot); +} + +static __always_inline int bch2_hash_hole(struct btree_trans *trans, struct btree_iter *iter, const struct bch_hash_desc desc, diff --git a/fs/bcachefs/util.c b/fs/bcachefs/util.c index a135136adeee..56b815fd9fc6 100644 --- a/fs/bcachefs/util.c +++ b/fs/bcachefs/util.c @@ -272,14 +272,14 @@ void bch2_print_string_as_lines(const char *prefix, const char *lines) console_unlock(); } -int bch2_save_backtrace(bch_stacktrace *stack, struct task_struct *task, unsigned skipnr) +int bch2_save_backtrace(bch_stacktrace *stack, struct task_struct *task, unsigned skipnr, + gfp_t gfp) { #ifdef CONFIG_STACKTRACE unsigned nr_entries = 0; - int ret = 0; stack->nr = 0; - ret = darray_make_room(stack, 32); + int ret = darray_make_room_gfp(stack, 32, gfp); if (ret) return ret; @@ -308,10 +308,10 @@ void bch2_prt_backtrace(struct printbuf *out, bch_stacktrace *stack) } } -int bch2_prt_task_backtrace(struct printbuf *out, struct task_struct *task, unsigned skipnr) +int bch2_prt_task_backtrace(struct printbuf *out, struct task_struct *task, unsigned skipnr, gfp_t gfp) { bch_stacktrace stack = { 0 }; - int ret = bch2_save_backtrace(&stack, task, skipnr + 1); + int ret = bch2_save_backtrace(&stack, task, skipnr + 1, gfp); bch2_prt_backtrace(out, &stack); darray_exit(&stack); diff --git a/fs/bcachefs/util.h b/fs/bcachefs/util.h index df67bf55fe2b..b414736d59a5 100644 --- a/fs/bcachefs/util.h +++ b/fs/bcachefs/util.h @@ -348,9 +348,9 @@ void bch2_prt_u64_base2(struct printbuf *, u64); void bch2_print_string_as_lines(const char *prefix, const char *lines); typedef DARRAY(unsigned long) bch_stacktrace; -int bch2_save_backtrace(bch_stacktrace *stack, struct task_struct *, unsigned); +int bch2_save_backtrace(bch_stacktrace *stack, struct task_struct *, unsigned, gfp_t); void bch2_prt_backtrace(struct printbuf *, bch_stacktrace *); -int bch2_prt_task_backtrace(struct printbuf *, struct task_struct *, unsigned); +int bch2_prt_task_backtrace(struct printbuf *, struct task_struct *, unsigned, gfp_t); static inline void prt_bdevname(struct printbuf *out, struct block_device *bdev) { diff --git a/fs/btrfs/compression.c b/fs/btrfs/compression.c index 193168214eeb..68345f73d429 100644 --- a/fs/btrfs/compression.c +++ b/fs/btrfs/compression.c @@ -141,16 +141,16 @@ static int compression_decompress_bio(struct list_head *ws, } static int compression_decompress(int type, struct list_head *ws, - const u8 *data_in, struct page *dest_page, - unsigned long start_byte, size_t srclen, size_t destlen) + const u8 *data_in, struct page *dest_page, + unsigned long dest_pgoff, size_t srclen, size_t destlen) { switch (type) { case BTRFS_COMPRESS_ZLIB: return zlib_decompress(ws, data_in, dest_page, - start_byte, srclen, destlen); + dest_pgoff, srclen, destlen); case BTRFS_COMPRESS_LZO: return lzo_decompress(ws, data_in, dest_page, - start_byte, srclen, destlen); + dest_pgoff, srclen, destlen); case BTRFS_COMPRESS_ZSTD: return zstd_decompress(ws, data_in, dest_page, - start_byte, srclen, destlen); + dest_pgoff, srclen, destlen); case BTRFS_COMPRESS_NONE: default: /* @@ -1037,14 +1037,23 @@ static int btrfs_decompress_bio(struct compressed_bio *cb) * start_byte tells us the offset into the compressed data we're interested in */ int btrfs_decompress(int type, const u8 *data_in, struct page *dest_page, - unsigned long start_byte, size_t srclen, size_t destlen) + unsigned long dest_pgoff, size_t srclen, size_t destlen) { + struct btrfs_fs_info *fs_info = btrfs_sb(dest_page->mapping->host->i_sb); struct list_head *workspace; + const u32 sectorsize = fs_info->sectorsize; int ret; + /* + * The full destination page range should not exceed the page size. + * And the @destlen should not exceed sectorsize, as this is only called for + * inline file extents, which should not exceed sectorsize. + */ + ASSERT(dest_pgoff + destlen <= PAGE_SIZE && destlen <= sectorsize); + workspace = get_workspace(type, 0); ret = compression_decompress(type, workspace, data_in, dest_page, - start_byte, srclen, destlen); + dest_pgoff, srclen, destlen); put_workspace(type, workspace); return ret; diff --git a/fs/btrfs/compression.h b/fs/btrfs/compression.h index 93cc92974dee..afd7e50d073d 100644 --- a/fs/btrfs/compression.h +++ b/fs/btrfs/compression.h @@ -148,7 +148,7 @@ int zlib_compress_pages(struct list_head *ws, struct address_space *mapping, unsigned long *total_in, unsigned long *total_out); int zlib_decompress_bio(struct list_head *ws, struct compressed_bio *cb); int zlib_decompress(struct list_head *ws, const u8 *data_in, - struct page *dest_page, unsigned long start_byte, size_t srclen, + struct page *dest_page, unsigned long dest_pgoff, size_t srclen, size_t destlen); struct list_head *zlib_alloc_workspace(unsigned int level); void zlib_free_workspace(struct list_head *ws); @@ -159,7 +159,7 @@ int lzo_compress_pages(struct list_head *ws, struct address_space *mapping, unsigned long *total_in, unsigned long *total_out); int lzo_decompress_bio(struct list_head *ws, struct compressed_bio *cb); int lzo_decompress(struct list_head *ws, const u8 *data_in, - struct page *dest_page, unsigned long start_byte, size_t srclen, + struct page *dest_page, unsigned long dest_pgoff, size_t srclen, size_t destlen); struct list_head *lzo_alloc_workspace(unsigned int level); void lzo_free_workspace(struct list_head *ws); diff --git a/fs/btrfs/extent-tree.c b/fs/btrfs/extent-tree.c index f396aba92c57..8e8cc1111277 100644 --- a/fs/btrfs/extent-tree.c +++ b/fs/btrfs/extent-tree.c @@ -1260,7 +1260,8 @@ static int btrfs_issue_discard(struct block_device *bdev, u64 start, u64 len, u64 bytes_left, end; u64 aligned_start = ALIGN(start, 1 << SECTOR_SHIFT); - if (WARN_ON(start != aligned_start)) { + /* Adjust the range to be aligned to 512B sectors if necessary. */ + if (start != aligned_start) { len -= aligned_start - start; len = round_down(len, 1 << SECTOR_SHIFT); start = aligned_start; @@ -4298,6 +4299,42 @@ static int prepare_allocation_clustered(struct btrfs_fs_info *fs_info, return 0; } +static int prepare_allocation_zoned(struct btrfs_fs_info *fs_info, + struct find_free_extent_ctl *ffe_ctl) +{ + if (ffe_ctl->for_treelog) { + spin_lock(&fs_info->treelog_bg_lock); + if (fs_info->treelog_bg) + ffe_ctl->hint_byte = fs_info->treelog_bg; + spin_unlock(&fs_info->treelog_bg_lock); + } else if (ffe_ctl->for_data_reloc) { + spin_lock(&fs_info->relocation_bg_lock); + if (fs_info->data_reloc_bg) + ffe_ctl->hint_byte = fs_info->data_reloc_bg; + spin_unlock(&fs_info->relocation_bg_lock); + } else if (ffe_ctl->flags & BTRFS_BLOCK_GROUP_DATA) { + struct btrfs_block_group *block_group; + + spin_lock(&fs_info->zone_active_bgs_lock); + list_for_each_entry(block_group, &fs_info->zone_active_bgs, active_bg_list) { + /* + * No lock is OK here because avail is monotinically + * decreasing, and this is just a hint. + */ + u64 avail = block_group->zone_capacity - block_group->alloc_offset; + + if (block_group_bits(block_group, ffe_ctl->flags) && + avail >= ffe_ctl->num_bytes) { + ffe_ctl->hint_byte = block_group->start; + break; + } + } + spin_unlock(&fs_info->zone_active_bgs_lock); + } + + return 0; +} + static int prepare_allocation(struct btrfs_fs_info *fs_info, struct find_free_extent_ctl *ffe_ctl, struct btrfs_space_info *space_info, @@ -4308,19 +4345,7 @@ static int prepare_allocation(struct btrfs_fs_info *fs_info, return prepare_allocation_clustered(fs_info, ffe_ctl, space_info, ins); case BTRFS_EXTENT_ALLOC_ZONED: - if (ffe_ctl->for_treelog) { - spin_lock(&fs_info->treelog_bg_lock); - if (fs_info->treelog_bg) - ffe_ctl->hint_byte = fs_info->treelog_bg; - spin_unlock(&fs_info->treelog_bg_lock); - } - if (ffe_ctl->for_data_reloc) { - spin_lock(&fs_info->relocation_bg_lock); - if (fs_info->data_reloc_bg) - ffe_ctl->hint_byte = fs_info->data_reloc_bg; - spin_unlock(&fs_info->relocation_bg_lock); - } - return 0; + return prepare_allocation_zoned(fs_info, ffe_ctl); default: BUG(); } diff --git a/fs/btrfs/inode.c b/fs/btrfs/inode.c index 809b11472a80..1eb93d3962aa 100644 --- a/fs/btrfs/inode.c +++ b/fs/btrfs/inode.c @@ -4458,6 +4458,8 @@ int btrfs_delete_subvolume(struct btrfs_inode *dir, struct dentry *dentry) u64 root_flags; int ret; + down_write(&fs_info->subvol_sem); + /* * Don't allow to delete a subvolume with send in progress. This is * inside the inode lock so the error handling that has to drop the bit @@ -4469,25 +4471,25 @@ int btrfs_delete_subvolume(struct btrfs_inode *dir, struct dentry *dentry) btrfs_warn(fs_info, "attempt to delete subvolume %llu during send", dest->root_key.objectid); - return -EPERM; + ret = -EPERM; + goto out_up_write; } if (atomic_read(&dest->nr_swapfiles)) { spin_unlock(&dest->root_item_lock); btrfs_warn(fs_info, "attempt to delete subvolume %llu with active swapfile", root->root_key.objectid); - return -EPERM; + ret = -EPERM; + goto out_up_write; } root_flags = btrfs_root_flags(&dest->root_item); btrfs_set_root_flags(&dest->root_item, root_flags | BTRFS_ROOT_SUBVOL_DEAD); spin_unlock(&dest->root_item_lock); - down_write(&fs_info->subvol_sem); - ret = may_destroy_subvol(dest); if (ret) - goto out_up_write; + goto out_undead; btrfs_init_block_rsv(&block_rsv, BTRFS_BLOCK_RSV_TEMP); /* @@ -4497,7 +4499,7 @@ int btrfs_delete_subvolume(struct btrfs_inode *dir, struct dentry *dentry) */ ret = btrfs_subvolume_reserve_metadata(root, &block_rsv, 5, true); if (ret) - goto out_up_write; + goto out_undead; trans = btrfs_start_transaction(root, 0); if (IS_ERR(trans)) { @@ -4563,15 +4565,17 @@ out_end_trans: inode->i_flags |= S_DEAD; out_release: btrfs_subvolume_release_metadata(root, &block_rsv); -out_up_write: - up_write(&fs_info->subvol_sem); +out_undead: if (ret) { spin_lock(&dest->root_item_lock); root_flags = btrfs_root_flags(&dest->root_item); btrfs_set_root_flags(&dest->root_item, root_flags & ~BTRFS_ROOT_SUBVOL_DEAD); spin_unlock(&dest->root_item_lock); - } else { + } +out_up_write: + up_write(&fs_info->subvol_sem); + if (!ret) { d_invalidate(dentry); btrfs_prune_dentries(dest); ASSERT(dest->send_in_progress == 0); diff --git a/fs/btrfs/ioctl.c b/fs/btrfs/ioctl.c index 41b479861b3c..dfed9dd9c2d7 100644 --- a/fs/btrfs/ioctl.c +++ b/fs/btrfs/ioctl.c @@ -790,6 +790,9 @@ static int create_snapshot(struct btrfs_root *root, struct inode *dir, return -EOPNOTSUPP; } + if (btrfs_root_refs(&root->root_item) == 0) + return -ENOENT; + if (!test_bit(BTRFS_ROOT_SHAREABLE, &root->state)) return -EINVAL; @@ -2608,6 +2611,10 @@ static int btrfs_ioctl_defrag(struct file *file, void __user *argp) ret = -EFAULT; goto out; } + if (range.flags & ~BTRFS_DEFRAG_RANGE_FLAGS_SUPP) { + ret = -EOPNOTSUPP; + goto out; + } /* compression requires us to start the IO */ if ((range.flags & BTRFS_DEFRAG_RANGE_COMPRESS)) { range.flags |= BTRFS_DEFRAG_RANGE_START_IO; diff --git a/fs/btrfs/lzo.c b/fs/btrfs/lzo.c index 1131d5a29d61..e43bc0fdc74e 100644 --- a/fs/btrfs/lzo.c +++ b/fs/btrfs/lzo.c @@ -425,16 +425,16 @@ int lzo_decompress_bio(struct list_head *ws, struct compressed_bio *cb) } int lzo_decompress(struct list_head *ws, const u8 *data_in, - struct page *dest_page, unsigned long start_byte, size_t srclen, + struct page *dest_page, unsigned long dest_pgoff, size_t srclen, size_t destlen) { struct workspace *workspace = list_entry(ws, struct workspace, list); + struct btrfs_fs_info *fs_info = btrfs_sb(dest_page->mapping->host->i_sb); + const u32 sectorsize = fs_info->sectorsize; size_t in_len; size_t out_len; size_t max_segment_len = WORKSPACE_BUF_LENGTH; int ret = 0; - char *kaddr; - unsigned long bytes; if (srclen < LZO_LEN || srclen > max_segment_len + LZO_LEN * 2) return -EUCLEAN; @@ -451,7 +451,7 @@ int lzo_decompress(struct list_head *ws, const u8 *data_in, } data_in += LZO_LEN; - out_len = PAGE_SIZE; + out_len = sectorsize; ret = lzo1x_decompress_safe(data_in, in_len, workspace->buf, &out_len); if (ret != LZO_E_OK) { pr_warn("BTRFS: decompress failed!\n"); @@ -459,29 +459,13 @@ int lzo_decompress(struct list_head *ws, const u8 *data_in, goto out; } - if (out_len < start_byte) { + ASSERT(out_len <= sectorsize); + memcpy_to_page(dest_page, dest_pgoff, workspace->buf, out_len); + /* Early end, considered as an error. */ + if (unlikely(out_len < destlen)) { ret = -EIO; - goto out; + memzero_page(dest_page, dest_pgoff + out_len, destlen - out_len); } - - /* - * the caller is already checking against PAGE_SIZE, but lets - * move this check closer to the memcpy/memset - */ - destlen = min_t(unsigned long, destlen, PAGE_SIZE); - bytes = min_t(unsigned long, destlen, out_len - start_byte); - - kaddr = kmap_local_page(dest_page); - memcpy(kaddr, workspace->buf + start_byte, bytes); - - /* - * btrfs_getblock is doing a zero on the tail of the page too, - * but this will cover anything missing from the decompressed - * data. - */ - if (bytes < destlen) - memset(kaddr+bytes, 0, destlen-bytes); - kunmap_local(kaddr); out: return ret; } diff --git a/fs/btrfs/ref-verify.c b/fs/btrfs/ref-verify.c index 6486f0d7e993..8c4fc98ca9ce 100644 --- a/fs/btrfs/ref-verify.c +++ b/fs/btrfs/ref-verify.c @@ -889,8 +889,10 @@ int btrfs_ref_tree_mod(struct btrfs_fs_info *fs_info, out_unlock: spin_unlock(&fs_info->ref_verify_lock); out: - if (ret) + if (ret) { + btrfs_free_ref_cache(fs_info); btrfs_clear_opt(fs_info->mount_opt, REF_VERIFY); + } return ret; } @@ -1021,8 +1023,8 @@ int btrfs_build_ref_tree(struct btrfs_fs_info *fs_info) } } if (ret) { - btrfs_clear_opt(fs_info->mount_opt, REF_VERIFY); btrfs_free_ref_cache(fs_info); + btrfs_clear_opt(fs_info->mount_opt, REF_VERIFY); } btrfs_free_path(path); return ret; diff --git a/fs/btrfs/scrub.c b/fs/btrfs/scrub.c index a01807cbd4d4..0123d2728923 100644 --- a/fs/btrfs/scrub.c +++ b/fs/btrfs/scrub.c @@ -1098,12 +1098,22 @@ out: static void scrub_read_endio(struct btrfs_bio *bbio) { struct scrub_stripe *stripe = bbio->private; + struct bio_vec *bvec; + int sector_nr = calc_sector_number(stripe, bio_first_bvec_all(&bbio->bio)); + int num_sectors; + u32 bio_size = 0; + int i; + + ASSERT(sector_nr < stripe->nr_sectors); + bio_for_each_bvec_all(bvec, &bbio->bio, i) + bio_size += bvec->bv_len; + num_sectors = bio_size >> stripe->bg->fs_info->sectorsize_bits; if (bbio->bio.bi_status) { - bitmap_set(&stripe->io_error_bitmap, 0, stripe->nr_sectors); - bitmap_set(&stripe->error_bitmap, 0, stripe->nr_sectors); + bitmap_set(&stripe->io_error_bitmap, sector_nr, num_sectors); + bitmap_set(&stripe->error_bitmap, sector_nr, num_sectors); } else { - bitmap_clear(&stripe->io_error_bitmap, 0, stripe->nr_sectors); + bitmap_clear(&stripe->io_error_bitmap, sector_nr, num_sectors); } bio_put(&bbio->bio); if (atomic_dec_and_test(&stripe->pending_io)) { @@ -1636,6 +1646,9 @@ static void scrub_submit_extent_sector_read(struct scrub_ctx *sctx, { struct btrfs_fs_info *fs_info = stripe->bg->fs_info; struct btrfs_bio *bbio = NULL; + unsigned int nr_sectors = min(BTRFS_STRIPE_LEN, stripe->bg->start + + stripe->bg->length - stripe->logical) >> + fs_info->sectorsize_bits; u64 stripe_len = BTRFS_STRIPE_LEN; int mirror = stripe->mirror_num; int i; @@ -1646,6 +1659,10 @@ static void scrub_submit_extent_sector_read(struct scrub_ctx *sctx, struct page *page = scrub_stripe_get_page(stripe, i); unsigned int pgoff = scrub_stripe_get_page_offset(stripe, i); + /* We're beyond the chunk boundary, no need to read anymore. */ + if (i >= nr_sectors) + break; + /* The current sector cannot be merged, submit the bio. */ if (bbio && ((i > 0 && @@ -1701,6 +1718,9 @@ static void scrub_submit_initial_read(struct scrub_ctx *sctx, { struct btrfs_fs_info *fs_info = sctx->fs_info; struct btrfs_bio *bbio; + unsigned int nr_sectors = min(BTRFS_STRIPE_LEN, stripe->bg->start + + stripe->bg->length - stripe->logical) >> + fs_info->sectorsize_bits; int mirror = stripe->mirror_num; ASSERT(stripe->bg); @@ -1715,14 +1735,16 @@ static void scrub_submit_initial_read(struct scrub_ctx *sctx, bbio = btrfs_bio_alloc(SCRUB_STRIPE_PAGES, REQ_OP_READ, fs_info, scrub_read_endio, stripe); - /* Read the whole stripe. */ bbio->bio.bi_iter.bi_sector = stripe->logical >> SECTOR_SHIFT; - for (int i = 0; i < BTRFS_STRIPE_LEN >> PAGE_SHIFT; i++) { + /* Read the whole range inside the chunk boundary. */ + for (unsigned int cur = 0; cur < nr_sectors; cur++) { + struct page *page = scrub_stripe_get_page(stripe, cur); + unsigned int pgoff = scrub_stripe_get_page_offset(stripe, cur); int ret; - ret = bio_add_page(&bbio->bio, stripe->pages[i], PAGE_SIZE, 0); + ret = bio_add_page(&bbio->bio, page, fs_info->sectorsize, pgoff); /* We should have allocated enough bio vectors. */ - ASSERT(ret == PAGE_SIZE); + ASSERT(ret == fs_info->sectorsize); } atomic_inc(&stripe->pending_io); diff --git a/fs/btrfs/send.c b/fs/btrfs/send.c index 4e36550618e5..2d7519a6ce72 100644 --- a/fs/btrfs/send.c +++ b/fs/btrfs/send.c @@ -8205,8 +8205,8 @@ long btrfs_ioctl_send(struct inode *inode, struct btrfs_ioctl_send_args *arg) goto out; } - sctx->clone_roots = kvcalloc(sizeof(*sctx->clone_roots), - arg->clone_sources_count + 1, + sctx->clone_roots = kvcalloc(arg->clone_sources_count + 1, + sizeof(*sctx->clone_roots), GFP_KERNEL); if (!sctx->clone_roots) { ret = -ENOMEM; diff --git a/fs/btrfs/subpage.c b/fs/btrfs/subpage.c index 93511d54abf8..0e49dab8dad2 100644 --- a/fs/btrfs/subpage.c +++ b/fs/btrfs/subpage.c @@ -475,7 +475,8 @@ void btrfs_subpage_set_writeback(const struct btrfs_fs_info *fs_info, spin_lock_irqsave(&subpage->lock, flags); bitmap_set(subpage->bitmaps, start_bit, len >> fs_info->sectorsize_bits); - folio_start_writeback(folio); + if (!folio_test_writeback(folio)) + folio_start_writeback(folio); spin_unlock_irqrestore(&subpage->lock, flags); } diff --git a/fs/btrfs/super.c b/fs/btrfs/super.c index 896acfda1789..101f786963d4 100644 --- a/fs/btrfs/super.c +++ b/fs/btrfs/super.c @@ -1457,6 +1457,14 @@ static int btrfs_reconfigure(struct fs_context *fc) btrfs_info_to_ctx(fs_info, &old_ctx); + /* + * This is our "bind mount" trick, we don't want to allow the user to do + * anything other than mount a different ro/rw and a different subvol, + * all of the mount options should be maintained. + */ + if (mount_reconfigure) + ctx->mount_opt = old_ctx.mount_opt; + sync_filesystem(sb); set_bit(BTRFS_FS_STATE_REMOUNTING, &fs_info->fs_state); diff --git a/fs/btrfs/tree-checker.c b/fs/btrfs/tree-checker.c index 50fdc69fdddf..6eccf8496486 100644 --- a/fs/btrfs/tree-checker.c +++ b/fs/btrfs/tree-checker.c @@ -1436,7 +1436,7 @@ static int check_extent_item(struct extent_buffer *leaf, if (unlikely(ptr + btrfs_extent_inline_ref_size(inline_type) > end)) { extent_err(leaf, slot, "inline ref item overflows extent item, ptr %lu iref size %u end %lu", - ptr, inline_type, end); + ptr, btrfs_extent_inline_ref_size(inline_type), end); return -EUCLEAN; } diff --git a/fs/btrfs/volumes.c b/fs/btrfs/volumes.c index 4c32497311d2..d67785be2c77 100644 --- a/fs/btrfs/volumes.c +++ b/fs/btrfs/volumes.c @@ -3087,7 +3087,6 @@ struct btrfs_chunk_map *btrfs_get_chunk_map(struct btrfs_fs_info *fs_info, map = btrfs_find_chunk_map(fs_info, logical, length); if (unlikely(!map)) { - read_unlock(&fs_info->mapping_tree_lock); btrfs_crit(fs_info, "unable to find chunk map for logical %llu length %llu", logical, length); @@ -3095,7 +3094,6 @@ struct btrfs_chunk_map *btrfs_get_chunk_map(struct btrfs_fs_info *fs_info, } if (unlikely(map->start > logical || map->start + map->chunk_len <= logical)) { - read_unlock(&fs_info->mapping_tree_lock); btrfs_crit(fs_info, "found a bad chunk map, wanted %llu-%llu, found %llu-%llu", logical, logical + length, map->start, diff --git a/fs/btrfs/zlib.c b/fs/btrfs/zlib.c index 36cf1f0e338e..8da66ea699e8 100644 --- a/fs/btrfs/zlib.c +++ b/fs/btrfs/zlib.c @@ -354,18 +354,13 @@ done: } int zlib_decompress(struct list_head *ws, const u8 *data_in, - struct page *dest_page, unsigned long start_byte, size_t srclen, + struct page *dest_page, unsigned long dest_pgoff, size_t srclen, size_t destlen) { struct workspace *workspace = list_entry(ws, struct workspace, list); int ret = 0; int wbits = MAX_WBITS; - unsigned long bytes_left; - unsigned long total_out = 0; - unsigned long pg_offset = 0; - - destlen = min_t(unsigned long, destlen, PAGE_SIZE); - bytes_left = destlen; + unsigned long to_copy; workspace->strm.next_in = data_in; workspace->strm.avail_in = srclen; @@ -390,60 +385,30 @@ int zlib_decompress(struct list_head *ws, const u8 *data_in, return -EIO; } - while (bytes_left > 0) { - unsigned long buf_start; - unsigned long buf_offset; - unsigned long bytes; - - ret = zlib_inflate(&workspace->strm, Z_NO_FLUSH); - if (ret != Z_OK && ret != Z_STREAM_END) - break; - - buf_start = total_out; - total_out = workspace->strm.total_out; - - if (total_out == buf_start) { - ret = -EIO; - break; - } - - if (total_out <= start_byte) - goto next; - - if (total_out > start_byte && buf_start < start_byte) - buf_offset = start_byte - buf_start; - else - buf_offset = 0; - - bytes = min(PAGE_SIZE - pg_offset, - PAGE_SIZE - (buf_offset % PAGE_SIZE)); - bytes = min(bytes, bytes_left); + /* + * Everything (in/out buf) should be at most one sector, there should + * be no need to switch any input/output buffer. + */ + ret = zlib_inflate(&workspace->strm, Z_FINISH); + to_copy = min(workspace->strm.total_out, destlen); + if (ret != Z_STREAM_END) + goto out; - memcpy_to_page(dest_page, pg_offset, - workspace->buf + buf_offset, bytes); + memcpy_to_page(dest_page, dest_pgoff, workspace->buf, to_copy); - pg_offset += bytes; - bytes_left -= bytes; -next: - workspace->strm.next_out = workspace->buf; - workspace->strm.avail_out = workspace->buf_size; - } - - if (ret != Z_STREAM_END && bytes_left != 0) +out: + if (unlikely(to_copy != destlen)) { + pr_warn_ratelimited("BTRFS: infalte failed, decompressed=%lu expected=%zu\n", + to_copy, destlen); ret = -EIO; - else + } else { ret = 0; + } zlib_inflateEnd(&workspace->strm); - /* - * this should only happen if zlib returned fewer bytes than we - * expected. btrfs_get_block is responsible for zeroing from the - * end of the inline extent (destlen) to the end of the page - */ - if (pg_offset < destlen) { - memzero_page(dest_page, pg_offset, destlen - pg_offset); - } + if (unlikely(to_copy < destlen)) + memzero_page(dest_page, dest_pgoff + to_copy, destlen - to_copy); return ret; } diff --git a/fs/btrfs/zoned.c b/fs/btrfs/zoned.c index 5bd76813b23f..168af9d000d1 100644 --- a/fs/btrfs/zoned.c +++ b/fs/btrfs/zoned.c @@ -2055,6 +2055,7 @@ bool btrfs_zone_activate(struct btrfs_block_group *block_group) map = block_group->physical_map; + spin_lock(&fs_info->zone_active_bgs_lock); spin_lock(&block_group->lock); if (test_bit(BLOCK_GROUP_FLAG_ZONE_IS_ACTIVE, &block_group->runtime_flags)) { ret = true; @@ -2067,7 +2068,6 @@ bool btrfs_zone_activate(struct btrfs_block_group *block_group) goto out_unlock; } - spin_lock(&fs_info->zone_active_bgs_lock); for (i = 0; i < map->num_stripes; i++) { struct btrfs_zoned_device_info *zinfo; int reserved = 0; @@ -2087,20 +2087,17 @@ bool btrfs_zone_activate(struct btrfs_block_group *block_group) */ if (atomic_read(&zinfo->active_zones_left) <= reserved) { ret = false; - spin_unlock(&fs_info->zone_active_bgs_lock); goto out_unlock; } if (!btrfs_dev_set_active_zone(device, physical)) { /* Cannot activate the zone */ ret = false; - spin_unlock(&fs_info->zone_active_bgs_lock); goto out_unlock; } if (!is_data) zinfo->reserved_active_zones--; } - spin_unlock(&fs_info->zone_active_bgs_lock); /* Successfully activated all the zones */ set_bit(BLOCK_GROUP_FLAG_ZONE_IS_ACTIVE, &block_group->runtime_flags); @@ -2108,8 +2105,6 @@ bool btrfs_zone_activate(struct btrfs_block_group *block_group) /* For the active block group list */ btrfs_get_block_group(block_group); - - spin_lock(&fs_info->zone_active_bgs_lock); list_add_tail(&block_group->active_bg_list, &fs_info->zone_active_bgs); spin_unlock(&fs_info->zone_active_bgs_lock); @@ -2117,6 +2112,7 @@ bool btrfs_zone_activate(struct btrfs_block_group *block_group) out_unlock: spin_unlock(&block_group->lock); + spin_unlock(&fs_info->zone_active_bgs_lock); return ret; } diff --git a/fs/cachefiles/ondemand.c b/fs/cachefiles/ondemand.c index 5fd74ec60bef..4ba42f1fa3b4 100644 --- a/fs/cachefiles/ondemand.c +++ b/fs/cachefiles/ondemand.c @@ -539,6 +539,9 @@ int cachefiles_ondemand_init_object(struct cachefiles_object *object) struct fscache_volume *volume = object->volume->vcookie; size_t volume_key_size, cookie_key_size, data_len; + if (!object->ondemand) + return 0; + /* * CacheFiles will firstly check the cache file under the root cache * directory. If the coherency check failed, it will fallback to diff --git a/fs/erofs/compress.h b/fs/erofs/compress.h index 279933e007d2..7cc5841577b2 100644 --- a/fs/erofs/compress.h +++ b/fs/erofs/compress.h @@ -11,13 +11,12 @@ struct z_erofs_decompress_req { struct super_block *sb; struct page **in, **out; - unsigned short pageofs_in, pageofs_out; unsigned int inputsize, outputsize; - /* indicate the algorithm will be used for decompression */ - unsigned int alg; + unsigned int alg; /* the algorithm for decompression */ bool inplace_io, partial_decoding, fillgaps; + gfp_t gfp; /* allocation flags for extra temporary buffers */ }; struct z_erofs_decompressor { diff --git a/fs/erofs/decompressor.c b/fs/erofs/decompressor.c index 072ef6a66823..d4cee95af14c 100644 --- a/fs/erofs/decompressor.c +++ b/fs/erofs/decompressor.c @@ -111,8 +111,9 @@ static int z_erofs_lz4_prepare_dstpages(struct z_erofs_lz4_decompress_ctx *ctx, victim = availables[--top]; get_page(victim); } else { - victim = erofs_allocpage(pagepool, - GFP_KERNEL | __GFP_NOFAIL); + victim = erofs_allocpage(pagepool, rq->gfp); + if (!victim) + return -ENOMEM; set_page_private(victim, Z_EROFS_SHORTLIVED_PAGE); } rq->out[i] = victim; diff --git a/fs/erofs/decompressor_deflate.c b/fs/erofs/decompressor_deflate.c index 4a64a9c91dd3..b98872058abe 100644 --- a/fs/erofs/decompressor_deflate.c +++ b/fs/erofs/decompressor_deflate.c @@ -95,7 +95,7 @@ int z_erofs_load_deflate_config(struct super_block *sb, } int z_erofs_deflate_decompress(struct z_erofs_decompress_req *rq, - struct page **pagepool) + struct page **pgpl) { const unsigned int nrpages_out = PAGE_ALIGN(rq->pageofs_out + rq->outputsize) >> PAGE_SHIFT; @@ -158,8 +158,12 @@ again: strm->z.avail_out = min_t(u32, outsz, PAGE_SIZE - pofs); outsz -= strm->z.avail_out; if (!rq->out[no]) { - rq->out[no] = erofs_allocpage(pagepool, - GFP_KERNEL | __GFP_NOFAIL); + rq->out[no] = erofs_allocpage(pgpl, rq->gfp); + if (!rq->out[no]) { + kout = NULL; + err = -ENOMEM; + break; + } set_page_private(rq->out[no], Z_EROFS_SHORTLIVED_PAGE); } @@ -211,8 +215,11 @@ again: DBG_BUGON(erofs_page_is_managed(EROFS_SB(sb), rq->in[j])); - tmppage = erofs_allocpage(pagepool, - GFP_KERNEL | __GFP_NOFAIL); + tmppage = erofs_allocpage(pgpl, rq->gfp); + if (!tmppage) { + err = -ENOMEM; + goto failed; + } set_page_private(tmppage, Z_EROFS_SHORTLIVED_PAGE); copy_highpage(tmppage, rq->in[j]); rq->in[j] = tmppage; @@ -230,7 +237,7 @@ again: break; } } - +failed: if (zlib_inflateEnd(&strm->z) != Z_OK && !err) err = -EIO; if (kout) diff --git a/fs/erofs/decompressor_lzma.c b/fs/erofs/decompressor_lzma.c index 2dd14f99c1dc..6ca357d83cfa 100644 --- a/fs/erofs/decompressor_lzma.c +++ b/fs/erofs/decompressor_lzma.c @@ -148,7 +148,7 @@ again: } int z_erofs_lzma_decompress(struct z_erofs_decompress_req *rq, - struct page **pagepool) + struct page **pgpl) { const unsigned int nrpages_out = PAGE_ALIGN(rq->pageofs_out + rq->outputsize) >> PAGE_SHIFT; @@ -215,8 +215,11 @@ again: PAGE_SIZE - pageofs); outlen -= strm->buf.out_size; if (!rq->out[no] && rq->fillgaps) { /* deduped */ - rq->out[no] = erofs_allocpage(pagepool, - GFP_KERNEL | __GFP_NOFAIL); + rq->out[no] = erofs_allocpage(pgpl, rq->gfp); + if (!rq->out[no]) { + err = -ENOMEM; + break; + } set_page_private(rq->out[no], Z_EROFS_SHORTLIVED_PAGE); } @@ -258,8 +261,11 @@ again: DBG_BUGON(erofs_page_is_managed(EROFS_SB(rq->sb), rq->in[j])); - tmppage = erofs_allocpage(pagepool, - GFP_KERNEL | __GFP_NOFAIL); + tmppage = erofs_allocpage(pgpl, rq->gfp); + if (!tmppage) { + err = -ENOMEM; + goto failed; + } set_page_private(tmppage, Z_EROFS_SHORTLIVED_PAGE); copy_highpage(tmppage, rq->in[j]); rq->in[j] = tmppage; @@ -277,6 +283,7 @@ again: break; } } +failed: if (no < nrpages_out && strm->buf.out) kunmap(rq->out[no]); if (ni < nrpages_in) diff --git a/fs/erofs/fscache.c b/fs/erofs/fscache.c index bc12030393b2..5ff90026fd43 100644 --- a/fs/erofs/fscache.c +++ b/fs/erofs/fscache.c @@ -459,7 +459,7 @@ static struct erofs_fscache *erofs_fscache_acquire_cookie(struct super_block *sb inode->i_size = OFFSET_MAX; inode->i_mapping->a_ops = &erofs_fscache_meta_aops; - mapping_set_gfp_mask(inode->i_mapping, GFP_NOFS); + mapping_set_gfp_mask(inode->i_mapping, GFP_KERNEL); inode->i_blkbits = EROFS_SB(sb)->blkszbits; inode->i_private = ctx; diff --git a/fs/erofs/inode.c b/fs/erofs/inode.c index 3d616dea55dc..36e638e8b53a 100644 --- a/fs/erofs/inode.c +++ b/fs/erofs/inode.c @@ -60,7 +60,7 @@ static void *erofs_read_inode(struct erofs_buf *buf, } else { const unsigned int gotten = sb->s_blocksize - *ofs; - copied = kmalloc(vi->inode_isize, GFP_NOFS); + copied = kmalloc(vi->inode_isize, GFP_KERNEL); if (!copied) { err = -ENOMEM; goto err_out; diff --git a/fs/erofs/utils.c b/fs/erofs/utils.c index 5dea308764b4..e146d09151af 100644 --- a/fs/erofs/utils.c +++ b/fs/erofs/utils.c @@ -81,7 +81,7 @@ struct erofs_workgroup *erofs_insert_workgroup(struct super_block *sb, repeat: xa_lock(&sbi->managed_pslots); pre = __xa_cmpxchg(&sbi->managed_pslots, grp->index, - NULL, grp, GFP_NOFS); + NULL, grp, GFP_KERNEL); if (pre) { if (xa_is_err(pre)) { pre = ERR_PTR(xa_err(pre)); diff --git a/fs/erofs/zdata.c b/fs/erofs/zdata.c index 692c0c39be63..ff0aa72b0db3 100644 --- a/fs/erofs/zdata.c +++ b/fs/erofs/zdata.c @@ -82,6 +82,9 @@ struct z_erofs_pcluster { /* L: indicate several pageofs_outs or not */ bool multibases; + /* L: whether extra buffer allocations are best-effort */ + bool besteffort; + /* A: compressed bvecs (can be cached or inplaced pages) */ struct z_erofs_bvec compressed_bvecs[]; }; @@ -230,7 +233,7 @@ static int z_erofs_bvec_enqueue(struct z_erofs_bvec_iter *iter, struct page *nextpage = *candidate_bvpage; if (!nextpage) { - nextpage = erofs_allocpage(pagepool, GFP_NOFS); + nextpage = erofs_allocpage(pagepool, GFP_KERNEL); if (!nextpage) return -ENOMEM; set_page_private(nextpage, Z_EROFS_SHORTLIVED_PAGE); @@ -302,7 +305,7 @@ static struct z_erofs_pcluster *z_erofs_alloc_pcluster(unsigned int size) if (nrpages > pcs->maxpages) continue; - pcl = kmem_cache_zalloc(pcs->slab, GFP_NOFS); + pcl = kmem_cache_zalloc(pcs->slab, GFP_KERNEL); if (!pcl) return ERR_PTR(-ENOMEM); pcl->pclustersize = size; @@ -563,21 +566,19 @@ static void z_erofs_bind_cache(struct z_erofs_decompress_frontend *fe) __GFP_NOMEMALLOC | __GFP_NORETRY | __GFP_NOWARN; unsigned int i; - if (i_blocksize(fe->inode) != PAGE_SIZE) - return; - if (fe->mode < Z_EROFS_PCLUSTER_FOLLOWED) + if (i_blocksize(fe->inode) != PAGE_SIZE || + fe->mode < Z_EROFS_PCLUSTER_FOLLOWED) return; for (i = 0; i < pclusterpages; ++i) { struct page *page, *newpage; void *t; /* mark pages just found for debugging */ - /* the compressed page was loaded before */ + /* Inaccurate check w/o locking to avoid unneeded lookups */ if (READ_ONCE(pcl->compressed_bvecs[i].page)) continue; page = find_get_page(mc, pcl->obj.index + i); - if (page) { t = (void *)((unsigned long)page | 1); newpage = NULL; @@ -597,9 +598,13 @@ static void z_erofs_bind_cache(struct z_erofs_decompress_frontend *fe) set_page_private(newpage, Z_EROFS_PREALLOCATED_PAGE); t = (void *)((unsigned long)newpage | 1); } - - if (!cmpxchg_relaxed(&pcl->compressed_bvecs[i].page, NULL, t)) + spin_lock(&pcl->obj.lockref.lock); + if (!pcl->compressed_bvecs[i].page) { + pcl->compressed_bvecs[i].page = t; + spin_unlock(&pcl->obj.lockref.lock); continue; + } + spin_unlock(&pcl->obj.lockref.lock); if (page) put_page(page); @@ -694,7 +699,7 @@ static void z_erofs_cache_invalidate_folio(struct folio *folio, DBG_BUGON(stop > folio_size(folio) || stop < length); if (offset == 0 && stop == folio_size(folio)) - while (!z_erofs_cache_release_folio(folio, GFP_NOFS)) + while (!z_erofs_cache_release_folio(folio, 0)) cond_resched(); } @@ -713,36 +718,30 @@ int erofs_init_managed_cache(struct super_block *sb) set_nlink(inode, 1); inode->i_size = OFFSET_MAX; inode->i_mapping->a_ops = &z_erofs_cache_aops; - mapping_set_gfp_mask(inode->i_mapping, GFP_NOFS); + mapping_set_gfp_mask(inode->i_mapping, GFP_KERNEL); EROFS_SB(sb)->managed_cache = inode; return 0; } -static bool z_erofs_try_inplace_io(struct z_erofs_decompress_frontend *fe, - struct z_erofs_bvec *bvec) -{ - struct z_erofs_pcluster *const pcl = fe->pcl; - - while (fe->icur > 0) { - if (!cmpxchg(&pcl->compressed_bvecs[--fe->icur].page, - NULL, bvec->page)) { - pcl->compressed_bvecs[fe->icur] = *bvec; - return true; - } - } - return false; -} - /* callers must be with pcluster lock held */ static int z_erofs_attach_page(struct z_erofs_decompress_frontend *fe, struct z_erofs_bvec *bvec, bool exclusive) { + struct z_erofs_pcluster *pcl = fe->pcl; int ret; if (exclusive) { /* give priority for inplaceio to use file pages first */ - if (z_erofs_try_inplace_io(fe, bvec)) + spin_lock(&pcl->obj.lockref.lock); + while (fe->icur > 0) { + if (pcl->compressed_bvecs[--fe->icur].page) + continue; + pcl->compressed_bvecs[fe->icur] = *bvec; + spin_unlock(&pcl->obj.lockref.lock); return 0; + } + spin_unlock(&pcl->obj.lockref.lock); + /* otherwise, check if it can be used as a bvpage */ if (fe->mode >= Z_EROFS_PCLUSTER_FOLLOWED && !fe->candidate_bvpage) @@ -964,7 +963,7 @@ static int z_erofs_read_fragment(struct super_block *sb, struct page *page, } static int z_erofs_do_read_page(struct z_erofs_decompress_frontend *fe, - struct page *page) + struct page *page, bool ra) { struct inode *const inode = fe->inode; struct erofs_map_blocks *const map = &fe->map; @@ -1014,6 +1013,7 @@ repeat: err = z_erofs_pcluster_begin(fe); if (err) goto out; + fe->pcl->besteffort |= !ra; } /* @@ -1280,6 +1280,9 @@ static int z_erofs_decompress_pcluster(struct z_erofs_decompress_backend *be, .inplace_io = overlapped, .partial_decoding = pcl->partial, .fillgaps = pcl->multibases, + .gfp = pcl->besteffort ? + GFP_KERNEL | __GFP_NOFAIL : + GFP_NOWAIT | __GFP_NORETRY }, be->pagepool); /* must handle all compressed pages before actual file pages */ @@ -1322,6 +1325,7 @@ static int z_erofs_decompress_pcluster(struct z_erofs_decompress_backend *be, pcl->length = 0; pcl->partial = true; pcl->multibases = false; + pcl->besteffort = false; pcl->bvset.nextpage = NULL; pcl->vcnt = 0; @@ -1423,23 +1427,26 @@ static void z_erofs_fill_bio_vec(struct bio_vec *bvec, { gfp_t gfp = mapping_gfp_mask(mc); bool tocache = false; - struct z_erofs_bvec *zbv = pcl->compressed_bvecs + nr; + struct z_erofs_bvec zbv; struct address_space *mapping; - struct page *page, *oldpage; + struct page *page; int justfound, bs = i_blocksize(f->inode); /* Except for inplace pages, the entire page can be used for I/Os */ bvec->bv_offset = 0; bvec->bv_len = PAGE_SIZE; repeat: - oldpage = READ_ONCE(zbv->page); - if (!oldpage) + spin_lock(&pcl->obj.lockref.lock); + zbv = pcl->compressed_bvecs[nr]; + page = zbv.page; + justfound = (unsigned long)page & 1UL; + page = (struct page *)((unsigned long)page & ~1UL); + pcl->compressed_bvecs[nr].page = page; + spin_unlock(&pcl->obj.lockref.lock); + if (!page) goto out_allocpage; - justfound = (unsigned long)oldpage & 1UL; - page = (struct page *)((unsigned long)oldpage & ~1UL); bvec->bv_page = page; - DBG_BUGON(z_erofs_is_shortlived_page(page)); /* * Handle preallocated cached pages. We tried to allocate such pages @@ -1448,7 +1455,6 @@ repeat: */ if (page->private == Z_EROFS_PREALLOCATED_PAGE) { set_page_private(page, 0); - WRITE_ONCE(zbv->page, page); tocache = true; goto out_tocache; } @@ -1459,9 +1465,9 @@ repeat: * therefore it is impossible for `mapping` to be NULL. */ if (mapping && mapping != mc) { - if (zbv->offset < 0) - bvec->bv_offset = round_up(-zbv->offset, bs); - bvec->bv_len = round_up(zbv->end, bs) - bvec->bv_offset; + if (zbv.offset < 0) + bvec->bv_offset = round_up(-zbv.offset, bs); + bvec->bv_len = round_up(zbv.end, bs) - bvec->bv_offset; return; } @@ -1471,7 +1477,6 @@ repeat: /* the cached page is still in managed cache */ if (page->mapping == mc) { - WRITE_ONCE(zbv->page, page); /* * The cached page is still available but without a valid * `->private` pcluster hint. Let's reconnect them. @@ -1503,11 +1508,15 @@ repeat: put_page(page); out_allocpage: page = erofs_allocpage(&f->pagepool, gfp | __GFP_NOFAIL); - if (oldpage != cmpxchg(&zbv->page, oldpage, page)) { + spin_lock(&pcl->obj.lockref.lock); + if (pcl->compressed_bvecs[nr].page) { erofs_pagepool_add(&f->pagepool, page); + spin_unlock(&pcl->obj.lockref.lock); cond_resched(); goto repeat; } + pcl->compressed_bvecs[nr].page = page; + spin_unlock(&pcl->obj.lockref.lock); bvec->bv_page = page; out_tocache: if (!tocache || bs != PAGE_SIZE || @@ -1685,6 +1694,7 @@ submit_bio_retry: if (cur + bvec.bv_len > end) bvec.bv_len = end - cur; + DBG_BUGON(bvec.bv_len < sb->s_blocksize); if (!bio_add_page(bio, bvec.bv_page, bvec.bv_len, bvec.bv_offset)) goto submit_bio_retry; @@ -1785,7 +1795,7 @@ static void z_erofs_pcluster_readmore(struct z_erofs_decompress_frontend *f, if (PageUptodate(page)) unlock_page(page); else - (void)z_erofs_do_read_page(f, page); + (void)z_erofs_do_read_page(f, page, !!rac); put_page(page); } @@ -1806,7 +1816,7 @@ static int z_erofs_read_folio(struct file *file, struct folio *folio) f.headoffset = (erofs_off_t)folio->index << PAGE_SHIFT; z_erofs_pcluster_readmore(&f, NULL, true); - err = z_erofs_do_read_page(&f, &folio->page); + err = z_erofs_do_read_page(&f, &folio->page, false); z_erofs_pcluster_readmore(&f, NULL, false); z_erofs_pcluster_end(&f); @@ -1847,7 +1857,7 @@ static void z_erofs_readahead(struct readahead_control *rac) folio = head; head = folio_get_private(folio); - err = z_erofs_do_read_page(&f, &folio->page); + err = z_erofs_do_read_page(&f, &folio->page, true); if (err && err != -EINTR) erofs_err(inode->i_sb, "readahead error at folio %lu @ nid %llu", folio->index, EROFS_I(inode)->nid); diff --git a/fs/exec.c b/fs/exec.c index 8cdd5b2dd09c..af4fbb61cd53 100644 --- a/fs/exec.c +++ b/fs/exec.c @@ -128,7 +128,7 @@ SYSCALL_DEFINE1(uselib, const char __user *, library) struct filename *tmp = getname(library); int error = PTR_ERR(tmp); static const struct open_flags uselib_flags = { - .open_flag = O_LARGEFILE | O_RDONLY | __FMODE_EXEC, + .open_flag = O_LARGEFILE | O_RDONLY, .acc_mode = MAY_READ | MAY_EXEC, .intent = LOOKUP_OPEN, .lookup_flags = LOOKUP_FOLLOW, @@ -904,6 +904,10 @@ EXPORT_SYMBOL(transfer_args_to_stack); #endif /* CONFIG_MMU */ +/* + * On success, caller must call do_close_execat() on the returned + * struct file to close it. + */ static struct file *do_open_execat(int fd, struct filename *name, int flags) { struct file *file; @@ -948,6 +952,17 @@ exit: return ERR_PTR(err); } +/** + * open_exec - Open a path name for execution + * + * @name: path name to open with the intent of executing it. + * + * Returns ERR_PTR on failure or allocated struct file on success. + * + * As this is a wrapper for the internal do_open_execat(), callers + * must call allow_write_access() before fput() on release. Also see + * do_close_execat(). + */ struct file *open_exec(const char *name) { struct filename *filename = getname_kernel(name); @@ -1409,6 +1424,9 @@ int begin_new_exec(struct linux_binprm * bprm) out_unlock: up_write(&me->signal->exec_update_lock); + if (!bprm->cred) + mutex_unlock(&me->signal->cred_guard_mutex); + out: return retval; } @@ -1484,6 +1502,15 @@ static int prepare_bprm_creds(struct linux_binprm *bprm) return -ENOMEM; } +/* Matches do_open_execat() */ +static void do_close_execat(struct file *file) +{ + if (!file) + return; + allow_write_access(file); + fput(file); +} + static void free_bprm(struct linux_binprm *bprm) { if (bprm->mm) { @@ -1495,10 +1522,7 @@ static void free_bprm(struct linux_binprm *bprm) mutex_unlock(¤t->signal->cred_guard_mutex); abort_creds(bprm->cred); } - if (bprm->file) { - allow_write_access(bprm->file); - fput(bprm->file); - } + do_close_execat(bprm->file); if (bprm->executable) fput(bprm->executable); /* If a binfmt changed the interp, free it. */ @@ -1520,8 +1544,7 @@ static struct linux_binprm *alloc_bprm(int fd, struct filename *filename, int fl bprm = kzalloc(sizeof(*bprm), GFP_KERNEL); if (!bprm) { - allow_write_access(file); - fput(file); + do_close_execat(file); return ERR_PTR(-ENOMEM); } @@ -1610,6 +1633,7 @@ static void check_unsafe_exec(struct linux_binprm *bprm) } rcu_read_unlock(); + /* "users" and "in_exec" locked for copy_fs() */ if (p->fs->users > n_fs) bprm->unsafe |= LSM_UNSAFE_SHARE; else @@ -1826,9 +1850,6 @@ static int exec_binprm(struct linux_binprm *bprm) return 0; } -/* - * sys_execve() executes a new program. - */ static int bprm_execve(struct linux_binprm *bprm) { int retval; diff --git a/fs/exfat/inode.c b/fs/exfat/inode.c index 522edcbb2ce4..0687f952956c 100644 --- a/fs/exfat/inode.c +++ b/fs/exfat/inode.c @@ -501,7 +501,7 @@ static ssize_t exfat_direct_IO(struct kiocb *iocb, struct iov_iter *iter) struct inode *inode = mapping->host; struct exfat_inode_info *ei = EXFAT_I(inode); loff_t pos = iocb->ki_pos; - loff_t size = iocb->ki_pos + iov_iter_count(iter); + loff_t size = pos + iov_iter_count(iter); int rw = iov_iter_rw(iter); ssize_t ret; @@ -525,11 +525,10 @@ static ssize_t exfat_direct_IO(struct kiocb *iocb, struct iov_iter *iter) */ ret = blockdev_direct_IO(iocb, inode, iter, exfat_get_block); if (ret < 0) { - if (rw == WRITE) + if (rw == WRITE && ret != -EIOCBQUEUED) exfat_write_failed(mapping, size); - if (ret != -EIOCBQUEUED) - return ret; + return ret; } else size = pos + ret; diff --git a/fs/gfs2/dentry.c b/fs/gfs2/dentry.c index 177f1f41f225..2e215e8c3c88 100644 --- a/fs/gfs2/dentry.c +++ b/fs/gfs2/dentry.c @@ -32,25 +32,21 @@ static int gfs2_drevalidate(struct dentry *dentry, unsigned int flags) { - struct dentry *parent = NULL; + struct dentry *parent; struct gfs2_sbd *sdp; struct gfs2_inode *dip; - struct inode *dinode, *inode; + struct inode *inode; struct gfs2_holder d_gh; struct gfs2_inode *ip = NULL; int error, valid = 0; int had_lock = 0; - if (flags & LOOKUP_RCU) { - dinode = d_inode_rcu(READ_ONCE(dentry->d_parent)); - if (!dinode) - return -ECHILD; - } else { - parent = dget_parent(dentry); - dinode = d_inode(parent); - } - sdp = GFS2_SB(dinode); - dip = GFS2_I(dinode); + if (flags & LOOKUP_RCU) + return -ECHILD; + + parent = dget_parent(dentry); + sdp = GFS2_SB(d_inode(parent)); + dip = GFS2_I(d_inode(parent)); inode = d_inode(dentry); if (inode) { @@ -66,8 +62,7 @@ static int gfs2_drevalidate(struct dentry *dentry, unsigned int flags) had_lock = (gfs2_glock_is_locked_by_me(dip->i_gl) != NULL); if (!had_lock) { - error = gfs2_glock_nq_init(dip->i_gl, LM_ST_SHARED, - flags & LOOKUP_RCU ? GL_NOBLOCK : 0, &d_gh); + error = gfs2_glock_nq_init(dip->i_gl, LM_ST_SHARED, 0, &d_gh); if (error) goto out; } diff --git a/fs/gfs2/inode.c b/fs/gfs2/inode.c index 6bfc9383b7b8..1b95db2c3aac 100644 --- a/fs/gfs2/inode.c +++ b/fs/gfs2/inode.c @@ -1882,10 +1882,10 @@ int gfs2_permission(struct mnt_idmap *idmap, struct inode *inode, WARN_ON_ONCE(!may_not_block); return -ECHILD; } - if (gfs2_glock_is_locked_by_me(ip->i_gl) == NULL) { - int noblock = may_not_block ? GL_NOBLOCK : 0; - error = gfs2_glock_nq_init(ip->i_gl, LM_ST_SHARED, - LM_FLAG_ANY | noblock, &i_gh); + if (gfs2_glock_is_locked_by_me(gl) == NULL) { + if (may_not_block) + return -ECHILD; + error = gfs2_glock_nq_init(gl, LM_ST_SHARED, LM_FLAG_ANY, &i_gh); if (error) return error; } diff --git a/fs/hugetlbfs/inode.c b/fs/hugetlbfs/inode.c index ea5b8e57d904..671664fed307 100644 --- a/fs/hugetlbfs/inode.c +++ b/fs/hugetlbfs/inode.c @@ -340,7 +340,7 @@ static ssize_t hugetlbfs_read_iter(struct kiocb *iocb, struct iov_iter *to) } else { folio_unlock(folio); - if (!folio_test_has_hwpoisoned(folio)) + if (!folio_test_hwpoison(folio)) want = nr; else { /* diff --git a/fs/jfs/jfs_dmap.c b/fs/jfs/jfs_dmap.c index 8eec84c651bf..cb3cda1390ad 100644 --- a/fs/jfs/jfs_dmap.c +++ b/fs/jfs/jfs_dmap.c @@ -2763,9 +2763,7 @@ static int dbBackSplit(dmtree_t *tp, int leafno, bool is_ctl) * leafno - the number of the leaf to be updated. * newval - the new value for the leaf. * - * RETURN VALUES: - * 0 - success - * -EIO - i/o error + * RETURN VALUES: none */ static int dbJoin(dmtree_t *tp, int leafno, int newval, bool is_ctl) { @@ -2792,10 +2790,6 @@ static int dbJoin(dmtree_t *tp, int leafno, int newval, bool is_ctl) * get the buddy size (number of words covered) of * the new value. */ - - if ((newval - tp->dmt_budmin) > BUDMIN) - return -EIO; - budsz = BUDSIZE(newval, tp->dmt_budmin); /* try to join. diff --git a/fs/netfs/buffered_read.c b/fs/netfs/buffered_read.c index a59e7b2edaac..3298c29b5548 100644 --- a/fs/netfs/buffered_read.c +++ b/fs/netfs/buffered_read.c @@ -101,7 +101,7 @@ void netfs_rreq_unlock_folios(struct netfs_io_request *rreq) } if (!test_bit(NETFS_RREQ_DONT_UNLOCK_FOLIOS, &rreq->flags)) { - if (folio_index(folio) == rreq->no_unlock_folio && + if (folio->index == rreq->no_unlock_folio && test_bit(NETFS_RREQ_NO_UNLOCK_FOLIO, &rreq->flags)) _debug("no unlock"); else @@ -246,13 +246,13 @@ EXPORT_SYMBOL(netfs_readahead); */ int netfs_read_folio(struct file *file, struct folio *folio) { - struct address_space *mapping = folio_file_mapping(folio); + struct address_space *mapping = folio->mapping; struct netfs_io_request *rreq; struct netfs_inode *ctx = netfs_inode(mapping->host); struct folio *sink = NULL; int ret; - _enter("%lx", folio_index(folio)); + _enter("%lx", folio->index); rreq = netfs_alloc_request(mapping, file, folio_file_pos(folio), folio_size(folio), @@ -460,7 +460,7 @@ retry: ret = PTR_ERR(rreq); goto error; } - rreq->no_unlock_folio = folio_index(folio); + rreq->no_unlock_folio = folio->index; __set_bit(NETFS_RREQ_NO_UNLOCK_FOLIO, &rreq->flags); ret = netfs_begin_cache_read(rreq, ctx); @@ -518,7 +518,7 @@ int netfs_prefetch_for_write(struct file *file, struct folio *folio, size_t offset, size_t len) { struct netfs_io_request *rreq; - struct address_space *mapping = folio_file_mapping(folio); + struct address_space *mapping = folio->mapping; struct netfs_inode *ctx = netfs_inode(mapping->host); unsigned long long start = folio_pos(folio); size_t flen = folio_size(folio); @@ -535,7 +535,7 @@ int netfs_prefetch_for_write(struct file *file, struct folio *folio, goto error; } - rreq->no_unlock_folio = folio_index(folio); + rreq->no_unlock_folio = folio->index; __set_bit(NETFS_RREQ_NO_UNLOCK_FOLIO, &rreq->flags); ret = netfs_begin_cache_read(rreq, ctx); if (ret == -ENOMEM || ret == -EINTR || ret == -ERESTARTSYS) diff --git a/fs/netfs/buffered_write.c b/fs/netfs/buffered_write.c index 93dc76f34e39..a3059b3168fd 100644 --- a/fs/netfs/buffered_write.c +++ b/fs/netfs/buffered_write.c @@ -221,10 +221,11 @@ ssize_t netfs_perform_write(struct kiocb *iocb, struct iov_iter *iter, if (unlikely(fault_in_iov_iter_readable(iter, part) == part)) break; - ret = -ENOMEM; folio = netfs_grab_folio_for_write(mapping, pos, part); - if (!folio) + if (IS_ERR(folio)) { + ret = PTR_ERR(folio); break; + } flen = folio_size(folio); offset = pos & (flen - 1); @@ -343,7 +344,7 @@ ssize_t netfs_perform_write(struct kiocb *iocb, struct iov_iter *iter, break; default: WARN(true, "Unexpected modify type %u ix=%lx\n", - howto, folio_index(folio)); + howto, folio->index); ret = -EIO; goto error_folio_unlock; } @@ -648,7 +649,7 @@ static void netfs_pages_written_back(struct netfs_io_request *wreq) xas_for_each(&xas, folio, last) { WARN(!folio_test_writeback(folio), "bad %zx @%llx page %lx %lx\n", - wreq->len, wreq->start, folio_index(folio), last); + wreq->len, wreq->start, folio->index, last); if ((finfo = netfs_folio_info(folio))) { /* Streaming writes cannot be redirtied whilst under @@ -795,7 +796,7 @@ static void netfs_extend_writeback(struct address_space *mapping, continue; if (xa_is_value(folio)) break; - if (folio_index(folio) != index) { + if (folio->index != index) { xas_reset(xas); break; } @@ -901,7 +902,7 @@ static ssize_t netfs_write_back_from_locked_folio(struct address_space *mapping, long count = wbc->nr_to_write; int ret; - _enter(",%lx,%llx-%llx,%u", folio_index(folio), start, end, caching); + _enter(",%lx,%llx-%llx,%u", folio->index, start, end, caching); wreq = netfs_alloc_request(mapping, NULL, start, folio_size(folio), NETFS_WRITEBACK); @@ -1047,7 +1048,7 @@ search_again: start = folio_pos(folio); /* May regress with THPs */ - _debug("wback %lx", folio_index(folio)); + _debug("wback %lx", folio->index); /* At this point we hold neither the i_pages lock nor the page lock: * the page may be truncated or invalidated (changing page->mapping to diff --git a/fs/netfs/fscache_cache.c b/fs/netfs/fscache_cache.c index d645f8b302a2..9397ed39b0b4 100644 --- a/fs/netfs/fscache_cache.c +++ b/fs/netfs/fscache_cache.c @@ -179,13 +179,14 @@ EXPORT_SYMBOL(fscache_acquire_cache); void fscache_put_cache(struct fscache_cache *cache, enum fscache_cache_trace where) { - unsigned int debug_id = cache->debug_id; + unsigned int debug_id; bool zero; int ref; if (IS_ERR_OR_NULL(cache)) return; + debug_id = cache->debug_id; zero = __refcount_dec_and_test(&cache->ref, &ref); trace_fscache_cache(debug_id, ref - 1, where); diff --git a/fs/netfs/io.c b/fs/netfs/io.c index 4309edf33862..e8ff1e61ce79 100644 --- a/fs/netfs/io.c +++ b/fs/netfs/io.c @@ -124,7 +124,7 @@ static void netfs_rreq_unmark_after_write(struct netfs_io_request *rreq, /* We might have multiple writes from the same huge * folio, but we mustn't unlock a folio more than once. */ - if (have_unlocked && folio_index(folio) <= unlocked) + if (have_unlocked && folio->index <= unlocked) continue; unlocked = folio_next_index(folio) - 1; trace_netfs_folio(folio, netfs_folio_trace_end_copy); diff --git a/fs/netfs/misc.c b/fs/netfs/misc.c index 0e3af37fc924..90051ced8e2a 100644 --- a/fs/netfs/misc.c +++ b/fs/netfs/misc.c @@ -180,7 +180,7 @@ void netfs_invalidate_folio(struct folio *folio, size_t offset, size_t length) struct netfs_folio *finfo = NULL; size_t flen = folio_size(folio); - _enter("{%lx},%zx,%zx", folio_index(folio), offset, length); + _enter("{%lx},%zx,%zx", folio->index, offset, length); folio_wait_fscache(folio); diff --git a/fs/nfsd/nfs4state.c b/fs/nfsd/nfs4state.c index 2fa54cfd4882..6dc6340e2852 100644 --- a/fs/nfsd/nfs4state.c +++ b/fs/nfsd/nfs4state.c @@ -7911,14 +7911,16 @@ check_for_locks(struct nfs4_file *fp, struct nfs4_lockowner *lowner) { struct file_lock *fl; int status = false; - struct nfsd_file *nf = find_any_file(fp); + struct nfsd_file *nf; struct inode *inode; struct file_lock_context *flctx; + spin_lock(&fp->fi_lock); + nf = find_any_file_locked(fp); if (!nf) { /* Any valid lock stateid should have some sort of access */ WARN_ON_ONCE(1); - return status; + goto out; } inode = file_inode(nf->nf_file); @@ -7934,7 +7936,8 @@ check_for_locks(struct nfs4_file *fp, struct nfs4_lockowner *lowner) } spin_unlock(&flctx->flc_lock); } - nfsd_file_put(nf); +out: + spin_unlock(&fp->fi_lock); return status; } @@ -7944,10 +7947,8 @@ check_for_locks(struct nfs4_file *fp, struct nfs4_lockowner *lowner) * @cstate: NFSv4 COMPOUND state * @u: RELEASE_LOCKOWNER arguments * - * The lockowner's so_count is bumped when a lock record is added - * or when copying a conflicting lock. The latter case is brief, - * but can lead to fleeting false positives when looking for - * locks-in-use. + * Check if theree are any locks still held and if not - free the lockowner + * and any lock state that is owned. * * Return values: * %nfs_ok: lockowner released or not found @@ -7983,10 +7984,13 @@ nfsd4_release_lockowner(struct svc_rqst *rqstp, spin_unlock(&clp->cl_lock); return nfs_ok; } - if (atomic_read(&lo->lo_owner.so_count) != 2) { - spin_unlock(&clp->cl_lock); - nfs4_put_stateowner(&lo->lo_owner); - return nfserr_locks_held; + + list_for_each_entry(stp, &lo->lo_owner.so_stateids, st_perstateowner) { + if (check_for_locks(stp->st_stid.sc_file, lo)) { + spin_unlock(&clp->cl_lock); + nfs4_put_stateowner(&lo->lo_owner); + return nfserr_locks_held; + } } unhash_lockowner_locked(lo); while (!list_empty(&lo->lo_owner.so_stateids)) { diff --git a/fs/overlayfs/namei.c b/fs/overlayfs/namei.c index 984ffdaeed6c..5764f91d283e 100644 --- a/fs/overlayfs/namei.c +++ b/fs/overlayfs/namei.c @@ -18,10 +18,11 @@ struct ovl_lookup_data { struct super_block *sb; - struct vfsmount *mnt; + const struct ovl_layer *layer; struct qstr name; bool is_dir; bool opaque; + bool xwhiteouts; bool stop; bool last; char *redirect; @@ -201,17 +202,13 @@ struct dentry *ovl_decode_real_fh(struct ovl_fs *ofs, struct ovl_fh *fh, return real; } -static bool ovl_is_opaquedir(struct ovl_fs *ofs, const struct path *path) -{ - return ovl_path_check_dir_xattr(ofs, path, OVL_XATTR_OPAQUE); -} - static struct dentry *ovl_lookup_positive_unlocked(struct ovl_lookup_data *d, const char *name, struct dentry *base, int len, bool drop_negative) { - struct dentry *ret = lookup_one_unlocked(mnt_idmap(d->mnt), name, base, len); + struct dentry *ret = lookup_one_unlocked(mnt_idmap(d->layer->mnt), name, + base, len); if (!IS_ERR(ret) && d_flags_negative(smp_load_acquire(&ret->d_flags))) { if (drop_negative && ret->d_lockref.count == 1) { @@ -232,10 +229,13 @@ static int ovl_lookup_single(struct dentry *base, struct ovl_lookup_data *d, size_t prelen, const char *post, struct dentry **ret, bool drop_negative) { + struct ovl_fs *ofs = OVL_FS(d->sb); struct dentry *this; struct path path; int err; bool last_element = !post[0]; + bool is_upper = d->layer->idx == 0; + char val; this = ovl_lookup_positive_unlocked(d, name, base, namelen, drop_negative); if (IS_ERR(this)) { @@ -253,8 +253,8 @@ static int ovl_lookup_single(struct dentry *base, struct ovl_lookup_data *d, } path.dentry = this; - path.mnt = d->mnt; - if (ovl_path_is_whiteout(OVL_FS(d->sb), &path)) { + path.mnt = d->layer->mnt; + if (ovl_path_is_whiteout(ofs, &path)) { d->stop = d->opaque = true; goto put_and_out; } @@ -272,7 +272,7 @@ static int ovl_lookup_single(struct dentry *base, struct ovl_lookup_data *d, d->stop = true; goto put_and_out; } - err = ovl_check_metacopy_xattr(OVL_FS(d->sb), &path, NULL); + err = ovl_check_metacopy_xattr(ofs, &path, NULL); if (err < 0) goto out_err; @@ -292,7 +292,12 @@ static int ovl_lookup_single(struct dentry *base, struct ovl_lookup_data *d, if (d->last) goto out; - if (ovl_is_opaquedir(OVL_FS(d->sb), &path)) { + /* overlay.opaque=x means xwhiteouts directory */ + val = ovl_get_opaquedir_val(ofs, &path); + if (last_element && !is_upper && val == 'x') { + d->xwhiteouts = true; + ovl_layer_set_xwhiteouts(ofs, d->layer); + } else if (val == 'y') { d->stop = true; if (last_element) d->opaque = true; @@ -863,7 +868,8 @@ fail: * Returns next layer in stack starting from top. * Returns -1 if this is the last layer. */ -int ovl_path_next(int idx, struct dentry *dentry, struct path *path) +int ovl_path_next(int idx, struct dentry *dentry, struct path *path, + const struct ovl_layer **layer) { struct ovl_entry *oe = OVL_E(dentry); struct ovl_path *lowerstack = ovl_lowerstack(oe); @@ -871,13 +877,16 @@ int ovl_path_next(int idx, struct dentry *dentry, struct path *path) BUG_ON(idx < 0); if (idx == 0) { ovl_path_upper(dentry, path); - if (path->dentry) + if (path->dentry) { + *layer = &OVL_FS(dentry->d_sb)->layers[0]; return ovl_numlower(oe) ? 1 : -1; + } idx++; } BUG_ON(idx > ovl_numlower(oe)); path->dentry = lowerstack[idx - 1].dentry; - path->mnt = lowerstack[idx - 1].layer->mnt; + *layer = lowerstack[idx - 1].layer; + path->mnt = (*layer)->mnt; return (idx < ovl_numlower(oe)) ? idx + 1 : -1; } @@ -1055,7 +1064,7 @@ struct dentry *ovl_lookup(struct inode *dir, struct dentry *dentry, old_cred = ovl_override_creds(dentry->d_sb); upperdir = ovl_dentry_upper(dentry->d_parent); if (upperdir) { - d.mnt = ovl_upper_mnt(ofs); + d.layer = &ofs->layers[0]; err = ovl_lookup_layer(upperdir, &d, &upperdentry, true); if (err) goto out; @@ -1111,7 +1120,7 @@ struct dentry *ovl_lookup(struct inode *dir, struct dentry *dentry, else if (d.is_dir || !ofs->numdatalayer) d.last = lower.layer->idx == ovl_numlower(roe); - d.mnt = lower.layer->mnt; + d.layer = lower.layer; err = ovl_lookup_layer(lower.dentry, &d, &this, false); if (err) goto out_put; @@ -1278,6 +1287,8 @@ struct dentry *ovl_lookup(struct inode *dir, struct dentry *dentry, if (upperopaque) ovl_dentry_set_opaque(dentry); + if (d.xwhiteouts) + ovl_dentry_set_xwhiteouts(dentry); if (upperdentry) ovl_dentry_set_upper_alias(dentry); diff --git a/fs/overlayfs/overlayfs.h b/fs/overlayfs/overlayfs.h index 5ba11eb43767..ee949f3e7c77 100644 --- a/fs/overlayfs/overlayfs.h +++ b/fs/overlayfs/overlayfs.h @@ -50,7 +50,6 @@ enum ovl_xattr { OVL_XATTR_METACOPY, OVL_XATTR_PROTATTR, OVL_XATTR_XWHITEOUT, - OVL_XATTR_XWHITEOUTS, }; enum ovl_inode_flag { @@ -70,6 +69,8 @@ enum ovl_entry_flag { OVL_E_UPPER_ALIAS, OVL_E_OPAQUE, OVL_E_CONNECTED, + /* Lower stack may contain xwhiteout entries */ + OVL_E_XWHITEOUTS, }; enum { @@ -477,6 +478,10 @@ bool ovl_dentry_test_flag(unsigned long flag, struct dentry *dentry); bool ovl_dentry_is_opaque(struct dentry *dentry); bool ovl_dentry_is_whiteout(struct dentry *dentry); void ovl_dentry_set_opaque(struct dentry *dentry); +bool ovl_dentry_has_xwhiteouts(struct dentry *dentry); +void ovl_dentry_set_xwhiteouts(struct dentry *dentry); +void ovl_layer_set_xwhiteouts(struct ovl_fs *ofs, + const struct ovl_layer *layer); bool ovl_dentry_has_upper_alias(struct dentry *dentry); void ovl_dentry_set_upper_alias(struct dentry *dentry); bool ovl_dentry_needs_data_copy_up(struct dentry *dentry, int flags); @@ -494,11 +499,10 @@ struct file *ovl_path_open(const struct path *path, int flags); int ovl_copy_up_start(struct dentry *dentry, int flags); void ovl_copy_up_end(struct dentry *dentry); bool ovl_already_copied_up(struct dentry *dentry, int flags); -bool ovl_path_check_dir_xattr(struct ovl_fs *ofs, const struct path *path, - enum ovl_xattr ox); +char ovl_get_dir_xattr_val(struct ovl_fs *ofs, const struct path *path, + enum ovl_xattr ox); bool ovl_path_check_origin_xattr(struct ovl_fs *ofs, const struct path *path); bool ovl_path_check_xwhiteout_xattr(struct ovl_fs *ofs, const struct path *path); -bool ovl_path_check_xwhiteouts_xattr(struct ovl_fs *ofs, const struct path *path); bool ovl_init_uuid_xattr(struct super_block *sb, struct ovl_fs *ofs, const struct path *upperpath); @@ -573,7 +577,13 @@ static inline bool ovl_is_impuredir(struct super_block *sb, .mnt = ovl_upper_mnt(ofs), }; - return ovl_path_check_dir_xattr(ofs, &upperpath, OVL_XATTR_IMPURE); + return ovl_get_dir_xattr_val(ofs, &upperpath, OVL_XATTR_IMPURE) == 'y'; +} + +static inline char ovl_get_opaquedir_val(struct ovl_fs *ofs, + const struct path *path) +{ + return ovl_get_dir_xattr_val(ofs, path, OVL_XATTR_OPAQUE); } static inline bool ovl_redirect_follow(struct ovl_fs *ofs) @@ -680,7 +690,8 @@ int ovl_get_index_name(struct ovl_fs *ofs, struct dentry *origin, struct dentry *ovl_get_index_fh(struct ovl_fs *ofs, struct ovl_fh *fh); struct dentry *ovl_lookup_index(struct ovl_fs *ofs, struct dentry *upper, struct dentry *origin, bool verify); -int ovl_path_next(int idx, struct dentry *dentry, struct path *path); +int ovl_path_next(int idx, struct dentry *dentry, struct path *path, + const struct ovl_layer **layer); int ovl_verify_lowerdata(struct dentry *dentry); struct dentry *ovl_lookup(struct inode *dir, struct dentry *dentry, unsigned int flags); diff --git a/fs/overlayfs/ovl_entry.h b/fs/overlayfs/ovl_entry.h index 5fa9c58af65f..cb449ab310a7 100644 --- a/fs/overlayfs/ovl_entry.h +++ b/fs/overlayfs/ovl_entry.h @@ -40,6 +40,8 @@ struct ovl_layer { int idx; /* One fsid per unique underlying sb (upper fsid == 0) */ int fsid; + /* xwhiteouts were found on this layer */ + bool has_xwhiteouts; }; struct ovl_path { @@ -59,7 +61,7 @@ struct ovl_fs { unsigned int numfs; /* Number of data-only lower layers */ unsigned int numdatalayer; - const struct ovl_layer *layers; + struct ovl_layer *layers; struct ovl_sb *fs; /* workbasedir is the path at workdir= mount option */ struct dentry *workbasedir; diff --git a/fs/overlayfs/readdir.c b/fs/overlayfs/readdir.c index e71156baa7bc..0ca8af060b0c 100644 --- a/fs/overlayfs/readdir.c +++ b/fs/overlayfs/readdir.c @@ -305,8 +305,6 @@ static inline int ovl_dir_read(const struct path *realpath, if (IS_ERR(realfile)) return PTR_ERR(realfile); - rdd->in_xwhiteouts_dir = rdd->dentry && - ovl_path_check_xwhiteouts_xattr(OVL_FS(rdd->dentry->d_sb), realpath); rdd->first_maybe_whiteout = NULL; rdd->ctx.pos = 0; do { @@ -359,10 +357,13 @@ static int ovl_dir_read_merged(struct dentry *dentry, struct list_head *list, .is_lowest = false, }; int idx, next; + const struct ovl_layer *layer; for (idx = 0; idx != -1; idx = next) { - next = ovl_path_next(idx, dentry, &realpath); + next = ovl_path_next(idx, dentry, &realpath, &layer); rdd.is_upper = ovl_dentry_upper(dentry) == realpath.dentry; + rdd.in_xwhiteouts_dir = layer->has_xwhiteouts && + ovl_dentry_has_xwhiteouts(dentry); if (next != -1) { err = ovl_dir_read(&realpath, &rdd); diff --git a/fs/overlayfs/super.c b/fs/overlayfs/super.c index 4ab66e3d4cff..2eef6c70b2ae 100644 --- a/fs/overlayfs/super.c +++ b/fs/overlayfs/super.c @@ -1249,6 +1249,7 @@ static struct dentry *ovl_get_root(struct super_block *sb, struct ovl_entry *oe) { struct dentry *root; + struct ovl_fs *ofs = OVL_FS(sb); struct ovl_path *lowerpath = ovl_lowerstack(oe); unsigned long ino = d_inode(lowerpath->dentry)->i_ino; int fsid = lowerpath->layer->fsid; @@ -1270,6 +1271,20 @@ static struct dentry *ovl_get_root(struct super_block *sb, ovl_set_flag(OVL_IMPURE, d_inode(root)); } + /* Look for xwhiteouts marker except in the lowermost layer */ + for (int i = 0; i < ovl_numlower(oe) - 1; i++, lowerpath++) { + struct path path = { + .mnt = lowerpath->layer->mnt, + .dentry = lowerpath->dentry, + }; + + /* overlay.opaque=x means xwhiteouts directory */ + if (ovl_get_opaquedir_val(ofs, &path) == 'x') { + ovl_layer_set_xwhiteouts(ofs, lowerpath->layer); + ovl_dentry_set_xwhiteouts(root); + } + } + /* Root is always merge -> can have whiteouts */ ovl_set_flag(OVL_WHITEOUTS, d_inode(root)); ovl_dentry_set_flag(OVL_E_CONNECTED, root); diff --git a/fs/overlayfs/util.c b/fs/overlayfs/util.c index 0217094c23ea..a8e17f14d7a2 100644 --- a/fs/overlayfs/util.c +++ b/fs/overlayfs/util.c @@ -461,6 +461,33 @@ void ovl_dentry_set_opaque(struct dentry *dentry) ovl_dentry_set_flag(OVL_E_OPAQUE, dentry); } +bool ovl_dentry_has_xwhiteouts(struct dentry *dentry) +{ + return ovl_dentry_test_flag(OVL_E_XWHITEOUTS, dentry); +} + +void ovl_dentry_set_xwhiteouts(struct dentry *dentry) +{ + ovl_dentry_set_flag(OVL_E_XWHITEOUTS, dentry); +} + +/* + * ovl_layer_set_xwhiteouts() is called before adding the overlay dir + * dentry to dcache, while readdir of that same directory happens after + * the overlay dir dentry is in dcache, so if some cpu observes that + * ovl_dentry_is_xwhiteouts(), it will also observe layer->has_xwhiteouts + * for the layers where xwhiteouts marker was found in that merge dir. + */ +void ovl_layer_set_xwhiteouts(struct ovl_fs *ofs, + const struct ovl_layer *layer) +{ + if (layer->has_xwhiteouts) + return; + + /* Write once to read-mostly layer properties */ + ofs->layers[layer->idx].has_xwhiteouts = true; +} + /* * For hard links and decoded file handles, it's possible for ovl_dentry_upper() * to return positive, while there's no actual upper alias for the inode. @@ -739,19 +766,6 @@ bool ovl_path_check_xwhiteout_xattr(struct ovl_fs *ofs, const struct path *path) return res >= 0; } -bool ovl_path_check_xwhiteouts_xattr(struct ovl_fs *ofs, const struct path *path) -{ - struct dentry *dentry = path->dentry; - int res; - - /* xattr.whiteouts must be a directory */ - if (!d_is_dir(dentry)) - return false; - - res = ovl_path_getxattr(ofs, path, OVL_XATTR_XWHITEOUTS, NULL, 0); - return res >= 0; -} - /* * Load persistent uuid from xattr into s_uuid if found, or store a new * random generated value in s_uuid and in xattr. @@ -811,20 +825,17 @@ fail: return false; } -bool ovl_path_check_dir_xattr(struct ovl_fs *ofs, const struct path *path, - enum ovl_xattr ox) +char ovl_get_dir_xattr_val(struct ovl_fs *ofs, const struct path *path, + enum ovl_xattr ox) { int res; char val; if (!d_is_dir(path->dentry)) - return false; + return 0; res = ovl_path_getxattr(ofs, path, ox, &val, 1); - if (res == 1 && val == 'y') - return true; - - return false; + return res == 1 ? val : 0; } #define OVL_XATTR_OPAQUE_POSTFIX "opaque" @@ -837,7 +848,6 @@ bool ovl_path_check_dir_xattr(struct ovl_fs *ofs, const struct path *path, #define OVL_XATTR_METACOPY_POSTFIX "metacopy" #define OVL_XATTR_PROTATTR_POSTFIX "protattr" #define OVL_XATTR_XWHITEOUT_POSTFIX "whiteout" -#define OVL_XATTR_XWHITEOUTS_POSTFIX "whiteouts" #define OVL_XATTR_TAB_ENTRY(x) \ [x] = { [false] = OVL_XATTR_TRUSTED_PREFIX x ## _POSTFIX, \ @@ -854,7 +864,6 @@ const char *const ovl_xattr_table[][2] = { OVL_XATTR_TAB_ENTRY(OVL_XATTR_METACOPY), OVL_XATTR_TAB_ENTRY(OVL_XATTR_PROTATTR), OVL_XATTR_TAB_ENTRY(OVL_XATTR_XWHITEOUT), - OVL_XATTR_TAB_ENTRY(OVL_XATTR_XWHITEOUTS), }; int ovl_check_setxattr(struct ovl_fs *ofs, struct dentry *upperdentry, diff --git a/fs/smb/client/cached_dir.c b/fs/smb/client/cached_dir.c index 971892620504..1daeb5714faa 100644 --- a/fs/smb/client/cached_dir.c +++ b/fs/smb/client/cached_dir.c @@ -145,21 +145,27 @@ int open_cached_dir(unsigned int xid, struct cifs_tcon *tcon, struct cached_fid *cfid; struct cached_fids *cfids; const char *npath; + int retries = 0, cur_sleep = 1; if (tcon == NULL || tcon->cfids == NULL || tcon->nohandlecache || is_smb1_server(tcon->ses->server) || (dir_cache_timeout == 0)) return -EOPNOTSUPP; ses = tcon->ses; - server = cifs_pick_channel(ses); cfids = tcon->cfids; - if (!server->ops->new_lease_key) - return -EIO; - if (cifs_sb->root == NULL) return -ENOENT; +replay_again: + /* reinitialize for possible replay */ + flags = 0; + oplock = SMB2_OPLOCK_LEVEL_II; + server = cifs_pick_channel(ses); + + if (!server->ops->new_lease_key) + return -EIO; + utf16_path = cifs_convert_path_to_utf16(path, cifs_sb); if (!utf16_path) return -ENOMEM; @@ -268,6 +274,11 @@ int open_cached_dir(unsigned int xid, struct cifs_tcon *tcon, */ cfid->has_lease = true; + if (retries) { + smb2_set_replay(server, &rqst[0]); + smb2_set_replay(server, &rqst[1]); + } + rc = compound_send_recv(xid, ses, server, flags, 2, rqst, resp_buftype, rsp_iov); @@ -367,6 +378,11 @@ out: atomic_inc(&tcon->num_remote_opens); } kfree(utf16_path); + + if (is_replayable_error(rc) && + smb2_should_replay(tcon, &retries, &cur_sleep)) + goto replay_again; + return rc; } diff --git a/fs/smb/client/cifsencrypt.c b/fs/smb/client/cifsencrypt.c index ef4c2e3c9fa6..6322f0f68a17 100644 --- a/fs/smb/client/cifsencrypt.c +++ b/fs/smb/client/cifsencrypt.c @@ -572,7 +572,7 @@ static int calc_ntlmv2_hash(struct cifs_ses *ses, char *ntlmv2_hash, len = cifs_strtoUTF16(user, ses->user_name, len, nls_cp); UniStrupr(user); } else { - memset(user, '\0', 2); + *(u16 *)user = 0; } rc = crypto_shash_update(ses->server->secmech.hmacmd5, diff --git a/fs/smb/client/cifsfs.c b/fs/smb/client/cifsfs.c index e902de4e475a..2a4a4e3a8751 100644 --- a/fs/smb/client/cifsfs.c +++ b/fs/smb/client/cifsfs.c @@ -396,7 +396,7 @@ cifs_alloc_inode(struct super_block *sb) spin_lock_init(&cifs_inode->writers_lock); cifs_inode->writers = 0; cifs_inode->netfs.inode.i_blkbits = 14; /* 2**14 = CIFS_MAX_MSGSIZE */ - cifs_inode->server_eof = 0; + cifs_inode->netfs.remote_i_size = 0; cifs_inode->uniqueid = 0; cifs_inode->createtime = 0; cifs_inode->epoch = 0; @@ -1380,6 +1380,7 @@ ssize_t cifs_file_copychunk_range(unsigned int xid, struct inode *src_inode = file_inode(src_file); struct inode *target_inode = file_inode(dst_file); struct cifsInodeInfo *src_cifsi = CIFS_I(src_inode); + struct cifsInodeInfo *target_cifsi = CIFS_I(target_inode); struct cifsFileInfo *smb_file_src; struct cifsFileInfo *smb_file_target; struct cifs_tcon *src_tcon; @@ -1428,7 +1429,7 @@ ssize_t cifs_file_copychunk_range(unsigned int xid, * Advance the EOF marker after the flush above to the end of the range * if it's short of that. */ - if (src_cifsi->server_eof < off + len) { + if (src_cifsi->netfs.remote_i_size < off + len) { rc = cifs_precopy_set_eof(src_inode, src_cifsi, src_tcon, xid, off + len); if (rc < 0) goto unlock; @@ -1452,12 +1453,22 @@ ssize_t cifs_file_copychunk_range(unsigned int xid, /* Discard all the folios that overlap the destination region. */ truncate_inode_pages_range(&target_inode->i_data, fstart, fend); + fscache_invalidate(cifs_inode_cookie(target_inode), NULL, + i_size_read(target_inode), 0); + rc = file_modified(dst_file); if (!rc) { rc = target_tcon->ses->server->ops->copychunk_range(xid, smb_file_src, smb_file_target, off, len, destoff); - if (rc > 0 && destoff + rc > i_size_read(target_inode)) + if (rc > 0 && destoff + rc > i_size_read(target_inode)) { truncate_setsize(target_inode, destoff + rc); + netfs_resize_file(&target_cifsi->netfs, + i_size_read(target_inode), true); + fscache_resize_cookie(cifs_inode_cookie(target_inode), + i_size_read(target_inode)); + } + if (rc > 0 && destoff + rc > target_cifsi->netfs.zero_point) + target_cifsi->netfs.zero_point = destoff + rc; } file_accessed(src_file); diff --git a/fs/smb/client/cifsglob.h b/fs/smb/client/cifsglob.h index 20036fb16cec..16befff4cbb4 100644 --- a/fs/smb/client/cifsglob.h +++ b/fs/smb/client/cifsglob.h @@ -50,6 +50,11 @@ #define CIFS_DEF_ACTIMEO (1 * HZ) /* + * max sleep time before retry to server + */ +#define CIFS_MAX_SLEEP 2000 + +/* * max attribute cache timeout (jiffies) - 2^30 */ #define CIFS_MAX_ACTIMEO (1 << 30) @@ -1501,6 +1506,7 @@ struct cifs_writedata { struct smbd_mr *mr; #endif struct cifs_credits credits; + bool replay; }; /* @@ -1561,7 +1567,6 @@ struct cifsInodeInfo { spinlock_t writers_lock; unsigned int writers; /* Number of writers on this inode */ unsigned long time; /* jiffies of last update of inode */ - u64 server_eof; /* current file size on server -- protected by i_lock */ u64 uniqueid; /* server inode number */ u64 createtime; /* creation time on server */ __u8 lease_key[SMB2_LEASE_KEY_SIZE]; /* lease key for this inode */ @@ -1831,6 +1836,13 @@ static inline bool is_retryable_error(int error) return false; } +static inline bool is_replayable_error(int error) +{ + if (error == -EAGAIN || error == -ECONNABORTED) + return true; + return false; +} + /* cifs_get_writable_file() flags */ #define FIND_WR_ANY 0 diff --git a/fs/smb/client/file.c b/fs/smb/client/file.c index 3a213432775b..b75282c204da 100644 --- a/fs/smb/client/file.c +++ b/fs/smb/client/file.c @@ -87,7 +87,7 @@ void cifs_pages_written_back(struct inode *inode, loff_t start, unsigned int len continue; if (!folio_test_writeback(folio)) { WARN_ONCE(1, "bad %x @%llx page %lx %lx\n", - len, start, folio_index(folio), end); + len, start, folio->index, end); continue; } @@ -120,7 +120,7 @@ void cifs_pages_write_failed(struct inode *inode, loff_t start, unsigned int len continue; if (!folio_test_writeback(folio)) { WARN_ONCE(1, "bad %x @%llx page %lx %lx\n", - len, start, folio_index(folio), end); + len, start, folio->index, end); continue; } @@ -151,7 +151,7 @@ void cifs_pages_write_redirty(struct inode *inode, loff_t start, unsigned int le xas_for_each(&xas, folio, end) { if (!folio_test_writeback(folio)) { WARN_ONCE(1, "bad %x @%llx page %lx %lx\n", - len, start, folio_index(folio), end); + len, start, folio->index, end); continue; } @@ -2120,8 +2120,8 @@ cifs_update_eof(struct cifsInodeInfo *cifsi, loff_t offset, { loff_t end_of_write = offset + bytes_written; - if (end_of_write > cifsi->server_eof) - cifsi->server_eof = end_of_write; + if (end_of_write > cifsi->netfs.remote_i_size) + netfs_resize_file(&cifsi->netfs, end_of_write, true); } static ssize_t @@ -2651,7 +2651,7 @@ static void cifs_extend_writeback(struct address_space *mapping, continue; if (xa_is_value(folio)) break; - if (folio_index(folio) != index) + if (folio->index != index) break; if (!folio_try_get_rcu(folio)) { xas_reset(&xas); @@ -2899,7 +2899,7 @@ redo_folio: goto skip_write; } - if (folio_mapping(folio) != mapping || + if (folio->mapping != mapping || !folio_test_dirty(folio)) { start += folio_size(folio); folio_unlock(folio); @@ -3247,8 +3247,8 @@ cifs_uncached_writev_complete(struct work_struct *work) spin_lock(&inode->i_lock); cifs_update_eof(cifsi, wdata->offset, wdata->bytes); - if (cifsi->server_eof > inode->i_size) - i_size_write(inode, cifsi->server_eof); + if (cifsi->netfs.remote_i_size > inode->i_size) + i_size_write(inode, cifsi->netfs.remote_i_size); spin_unlock(&inode->i_lock); complete(&wdata->done); @@ -3300,6 +3300,7 @@ cifs_resend_wdata(struct cifs_writedata *wdata, struct list_head *wdata_list, if (wdata->cfile->invalidHandle) rc = -EAGAIN; else { + wdata->replay = true; #ifdef CONFIG_CIFS_SMB_DIRECT if (wdata->mr) { wdata->mr->need_invalidate = true; diff --git a/fs/smb/client/inode.c b/fs/smb/client/inode.c index f0989484f2c6..d02f8ba29cb5 100644 --- a/fs/smb/client/inode.c +++ b/fs/smb/client/inode.c @@ -104,7 +104,7 @@ cifs_revalidate_cache(struct inode *inode, struct cifs_fattr *fattr) fattr->cf_mtime = timestamp_truncate(fattr->cf_mtime, inode); mtime = inode_get_mtime(inode); if (timespec64_equal(&mtime, &fattr->cf_mtime) && - cifs_i->server_eof == fattr->cf_eof) { + cifs_i->netfs.remote_i_size == fattr->cf_eof) { cifs_dbg(FYI, "%s: inode %llu is unchanged\n", __func__, cifs_i->uniqueid); return; @@ -194,7 +194,7 @@ cifs_fattr_to_inode(struct inode *inode, struct cifs_fattr *fattr) else clear_bit(CIFS_INO_DELETE_PENDING, &cifs_i->flags); - cifs_i->server_eof = fattr->cf_eof; + cifs_i->netfs.remote_i_size = fattr->cf_eof; /* * Can't safely change the file size here if the client is writing to * it due to potential races. @@ -2858,7 +2858,7 @@ cifs_set_file_size(struct inode *inode, struct iattr *attrs, set_size_out: if (rc == 0) { - cifsInode->server_eof = attrs->ia_size; + netfs_resize_file(&cifsInode->netfs, attrs->ia_size, true); cifs_setsize(inode, attrs->ia_size); /* * i_blocks is not related to (i_size / i_blksize), but instead @@ -3011,6 +3011,7 @@ cifs_setattr_unix(struct dentry *direntry, struct iattr *attrs) if ((attrs->ia_valid & ATTR_SIZE) && attrs->ia_size != i_size_read(inode)) { truncate_setsize(inode, attrs->ia_size); + netfs_resize_file(&cifsInode->netfs, attrs->ia_size, true); fscache_resize_cookie(cifs_inode_cookie(inode), attrs->ia_size); } @@ -3210,6 +3211,7 @@ cifs_setattr_nounix(struct dentry *direntry, struct iattr *attrs) if ((attrs->ia_valid & ATTR_SIZE) && attrs->ia_size != i_size_read(inode)) { truncate_setsize(inode, attrs->ia_size); + netfs_resize_file(&cifsInode->netfs, attrs->ia_size, true); fscache_resize_cookie(cifs_inode_cookie(inode), attrs->ia_size); } diff --git a/fs/smb/client/readdir.c b/fs/smb/client/readdir.c index 94255401b38d..3b1b01d10f7d 100644 --- a/fs/smb/client/readdir.c +++ b/fs/smb/client/readdir.c @@ -141,7 +141,7 @@ retry: if (likely(reparse_inode_match(inode, fattr))) { fattr->cf_mode = inode->i_mode; fattr->cf_rdev = inode->i_rdev; - fattr->cf_eof = CIFS_I(inode)->server_eof; + fattr->cf_eof = CIFS_I(inode)->netfs.remote_i_size; fattr->cf_symlink_target = NULL; } else { CIFS_I(inode)->time = 0; diff --git a/fs/smb/client/smb2inode.c b/fs/smb/client/smb2inode.c index a652200540c8..05818cd6d932 100644 --- a/fs/smb/client/smb2inode.c +++ b/fs/smb/client/smb2inode.c @@ -120,6 +120,14 @@ static int smb2_compound_op(const unsigned int xid, struct cifs_tcon *tcon, unsigned int size[2]; void *data[2]; int len; + int retries = 0, cur_sleep = 1; + +replay_again: + /* reinitialize for possible replay */ + flags = 0; + oplock = SMB2_OPLOCK_LEVEL_NONE; + num_rqst = 0; + server = cifs_pick_channel(ses); vars = kzalloc(sizeof(*vars), GFP_ATOMIC); if (vars == NULL) @@ -127,8 +135,6 @@ static int smb2_compound_op(const unsigned int xid, struct cifs_tcon *tcon, rqst = &vars->rqst[0]; rsp_iov = &vars->rsp_iov[0]; - server = cifs_pick_channel(ses); - if (smb3_encryption_required(tcon)) flags |= CIFS_TRANSFORM_REQ; @@ -463,15 +469,24 @@ static int smb2_compound_op(const unsigned int xid, struct cifs_tcon *tcon, num_rqst++; if (cfile) { + if (retries) + for (i = 1; i < num_rqst - 2; i++) + smb2_set_replay(server, &rqst[i]); + rc = compound_send_recv(xid, ses, server, flags, num_rqst - 2, &rqst[1], &resp_buftype[1], &rsp_iov[1]); - } else + } else { + if (retries) + for (i = 0; i < num_rqst; i++) + smb2_set_replay(server, &rqst[i]); + rc = compound_send_recv(xid, ses, server, flags, num_rqst, rqst, resp_buftype, rsp_iov); + } finished: num_rqst = 0; @@ -620,9 +635,6 @@ finished: } SMB2_close_free(&rqst[num_rqst]); - if (cfile) - cifsFileInfo_put(cfile); - num_cmds += 2; if (out_iov && out_buftype) { memcpy(out_iov, rsp_iov, num_cmds * sizeof(*out_iov)); @@ -632,7 +644,16 @@ finished: for (i = 0; i < num_cmds; i++) free_rsp_buf(resp_buftype[i], rsp_iov[i].iov_base); } + num_cmds -= 2; /* correct num_cmds as there could be a retry */ kfree(vars); + + if (is_replayable_error(rc) && + smb2_should_replay(tcon, &retries, &cur_sleep)) + goto replay_again; + + if (cfile) + cifsFileInfo_put(cfile); + return rc; } diff --git a/fs/smb/client/smb2ops.c b/fs/smb/client/smb2ops.c index d9553c2556a2..83c898afc835 100644 --- a/fs/smb/client/smb2ops.c +++ b/fs/smb/client/smb2ops.c @@ -1108,7 +1108,7 @@ smb2_set_ea(const unsigned int xid, struct cifs_tcon *tcon, { struct smb2_compound_vars *vars; struct cifs_ses *ses = tcon->ses; - struct TCP_Server_Info *server = cifs_pick_channel(ses); + struct TCP_Server_Info *server; struct smb_rqst *rqst; struct kvec *rsp_iov; __le16 *utf16_path = NULL; @@ -1124,6 +1124,13 @@ smb2_set_ea(const unsigned int xid, struct cifs_tcon *tcon, struct smb2_file_full_ea_info *ea = NULL; struct smb2_query_info_rsp *rsp; int rc, used_len = 0; + int retries = 0, cur_sleep = 1; + +replay_again: + /* reinitialize for possible replay */ + flags = CIFS_CP_CREATE_CLOSE_OP; + oplock = SMB2_OPLOCK_LEVEL_NONE; + server = cifs_pick_channel(ses); if (smb3_encryption_required(tcon)) flags |= CIFS_TRANSFORM_REQ; @@ -1244,6 +1251,12 @@ smb2_set_ea(const unsigned int xid, struct cifs_tcon *tcon, goto sea_exit; smb2_set_related(&rqst[2]); + if (retries) { + smb2_set_replay(server, &rqst[0]); + smb2_set_replay(server, &rqst[1]); + smb2_set_replay(server, &rqst[2]); + } + rc = compound_send_recv(xid, ses, server, flags, 3, rqst, resp_buftype, rsp_iov); @@ -1260,6 +1273,11 @@ smb2_set_ea(const unsigned int xid, struct cifs_tcon *tcon, kfree(vars); out_free_path: kfree(utf16_path); + + if (is_replayable_error(rc) && + smb2_should_replay(tcon, &retries, &cur_sleep)) + goto replay_again; + return rc; } #endif @@ -1484,7 +1502,7 @@ smb2_ioctl_query_info(const unsigned int xid, struct smb_rqst *rqst; struct kvec *rsp_iov; struct cifs_ses *ses = tcon->ses; - struct TCP_Server_Info *server = cifs_pick_channel(ses); + struct TCP_Server_Info *server; char __user *arg = (char __user *)p; struct smb_query_info qi; struct smb_query_info __user *pqi; @@ -1501,6 +1519,13 @@ smb2_ioctl_query_info(const unsigned int xid, void *data[2]; int create_options = is_dir ? CREATE_NOT_FILE : CREATE_NOT_DIR; void (*free_req1_func)(struct smb_rqst *r); + int retries = 0, cur_sleep = 1; + +replay_again: + /* reinitialize for possible replay */ + flags = CIFS_CP_CREATE_CLOSE_OP; + oplock = SMB2_OPLOCK_LEVEL_NONE; + server = cifs_pick_channel(ses); vars = kzalloc(sizeof(*vars), GFP_ATOMIC); if (vars == NULL) @@ -1641,6 +1666,12 @@ smb2_ioctl_query_info(const unsigned int xid, goto free_req_1; smb2_set_related(&rqst[2]); + if (retries) { + smb2_set_replay(server, &rqst[0]); + smb2_set_replay(server, &rqst[1]); + smb2_set_replay(server, &rqst[2]); + } + rc = compound_send_recv(xid, ses, server, flags, 3, rqst, resp_buftype, rsp_iov); @@ -1701,6 +1732,11 @@ free_output_buffer: kfree(buffer); free_vars: kfree(vars); + + if (is_replayable_error(rc) && + smb2_should_replay(tcon, &retries, &cur_sleep)) + goto replay_again; + return rc; } @@ -2227,8 +2263,14 @@ smb2_query_dir_first(const unsigned int xid, struct cifs_tcon *tcon, struct cifs_open_parms oparms; struct smb2_query_directory_rsp *qd_rsp = NULL; struct smb2_create_rsp *op_rsp = NULL; - struct TCP_Server_Info *server = cifs_pick_channel(tcon->ses); - int retry_count = 0; + struct TCP_Server_Info *server; + int retries = 0, cur_sleep = 1; + +replay_again: + /* reinitialize for possible replay */ + flags = 0; + oplock = SMB2_OPLOCK_LEVEL_NONE; + server = cifs_pick_channel(tcon->ses); utf16_path = cifs_convert_path_to_utf16(path, cifs_sb); if (!utf16_path) @@ -2278,14 +2320,15 @@ smb2_query_dir_first(const unsigned int xid, struct cifs_tcon *tcon, smb2_set_related(&rqst[1]); -again: + if (retries) { + smb2_set_replay(server, &rqst[0]); + smb2_set_replay(server, &rqst[1]); + } + rc = compound_send_recv(xid, tcon->ses, server, flags, 2, rqst, resp_buftype, rsp_iov); - if (rc == -EAGAIN && retry_count++ < 10) - goto again; - /* If the open failed there is nothing to do */ op_rsp = (struct smb2_create_rsp *)rsp_iov[0].iov_base; if (op_rsp == NULL || op_rsp->hdr.Status != STATUS_SUCCESS) { @@ -2333,6 +2376,11 @@ again: SMB2_query_directory_free(&rqst[1]); free_rsp_buf(resp_buftype[0], rsp_iov[0].iov_base); free_rsp_buf(resp_buftype[1], rsp_iov[1].iov_base); + + if (is_replayable_error(rc) && + smb2_should_replay(tcon, &retries, &cur_sleep)) + goto replay_again; + return rc; } @@ -2458,6 +2506,22 @@ smb2_oplock_response(struct cifs_tcon *tcon, __u64 persistent_fid, } void +smb2_set_replay(struct TCP_Server_Info *server, struct smb_rqst *rqst) +{ + struct smb2_hdr *shdr; + + if (server->dialect < SMB30_PROT_ID) + return; + + shdr = (struct smb2_hdr *)(rqst->rq_iov[0].iov_base); + if (shdr == NULL) { + cifs_dbg(FYI, "shdr NULL in smb2_set_related\n"); + return; + } + shdr->Flags |= SMB2_FLAGS_REPLAY_OPERATION; +} + +void smb2_set_related(struct smb_rqst *rqst) { struct smb2_hdr *shdr; @@ -2530,6 +2594,27 @@ smb2_set_next_command(struct cifs_tcon *tcon, struct smb_rqst *rqst) } /* + * helper function for exponential backoff and check if replayable + */ +bool smb2_should_replay(struct cifs_tcon *tcon, + int *pretries, + int *pcur_sleep) +{ + if (!pretries || !pcur_sleep) + return false; + + if (tcon->retry || (*pretries)++ < tcon->ses->server->retrans) { + msleep(*pcur_sleep); + (*pcur_sleep) = ((*pcur_sleep) << 1); + if ((*pcur_sleep) > CIFS_MAX_SLEEP) + (*pcur_sleep) = CIFS_MAX_SLEEP; + return true; + } + + return false; +} + +/* * Passes the query info response back to the caller on success. * Caller need to free this with free_rsp_buf(). */ @@ -2542,7 +2627,7 @@ smb2_query_info_compound(const unsigned int xid, struct cifs_tcon *tcon, { struct smb2_compound_vars *vars; struct cifs_ses *ses = tcon->ses; - struct TCP_Server_Info *server = cifs_pick_channel(ses); + struct TCP_Server_Info *server; int flags = CIFS_CP_CREATE_CLOSE_OP; struct smb_rqst *rqst; int resp_buftype[3]; @@ -2553,6 +2638,13 @@ smb2_query_info_compound(const unsigned int xid, struct cifs_tcon *tcon, int rc; __le16 *utf16_path; struct cached_fid *cfid = NULL; + int retries = 0, cur_sleep = 1; + +replay_again: + /* reinitialize for possible replay */ + flags = CIFS_CP_CREATE_CLOSE_OP; + oplock = SMB2_OPLOCK_LEVEL_NONE; + server = cifs_pick_channel(ses); if (!path) path = ""; @@ -2633,6 +2725,14 @@ smb2_query_info_compound(const unsigned int xid, struct cifs_tcon *tcon, goto qic_exit; smb2_set_related(&rqst[2]); + if (retries) { + if (!cfid) { + smb2_set_replay(server, &rqst[0]); + smb2_set_replay(server, &rqst[2]); + } + smb2_set_replay(server, &rqst[1]); + } + if (cfid) { rc = compound_send_recv(xid, ses, server, flags, 1, &rqst[1], @@ -2665,6 +2765,11 @@ smb2_query_info_compound(const unsigned int xid, struct cifs_tcon *tcon, kfree(vars); out_free_path: kfree(utf16_path); + + if (is_replayable_error(rc) && + smb2_should_replay(tcon, &retries, &cur_sleep)) + goto replay_again; + return rc; } @@ -3213,6 +3318,9 @@ static long smb3_zero_range(struct file *file, struct cifs_tcon *tcon, cfile->fid.volatile_fid, cfile->pid, new_size); if (rc >= 0) { truncate_setsize(inode, new_size); + netfs_resize_file(&cifsi->netfs, new_size, true); + if (offset < cifsi->netfs.zero_point) + cifsi->netfs.zero_point = offset; fscache_resize_cookie(cifs_inode_cookie(inode), new_size); } } @@ -3436,7 +3544,7 @@ static long smb3_simple_falloc(struct file *file, struct cifs_tcon *tcon, rc = SMB2_set_eof(xid, tcon, cfile->fid.persistent_fid, cfile->fid.volatile_fid, cfile->pid, new_eof); if (rc == 0) { - cifsi->server_eof = new_eof; + netfs_resize_file(&cifsi->netfs, new_eof, true); cifs_setsize(inode, new_eof); cifs_truncate_page(inode->i_mapping, inode->i_size); truncate_setsize(inode, new_eof); @@ -3528,8 +3636,9 @@ static long smb3_collapse_range(struct file *file, struct cifs_tcon *tcon, int rc; unsigned int xid; struct inode *inode = file_inode(file); - struct cifsFileInfo *cfile = file->private_data; struct cifsInodeInfo *cifsi = CIFS_I(inode); + struct cifsFileInfo *cfile = file->private_data; + struct netfs_inode *ictx = &cifsi->netfs; loff_t old_eof, new_eof; xid = get_xid(); @@ -3549,6 +3658,7 @@ static long smb3_collapse_range(struct file *file, struct cifs_tcon *tcon, goto out_2; truncate_pagecache_range(inode, off, old_eof); + ictx->zero_point = old_eof; rc = smb2_copychunk_range(xid, cfile, cfile, off + len, old_eof - off - len, off); @@ -3563,9 +3673,10 @@ static long smb3_collapse_range(struct file *file, struct cifs_tcon *tcon, rc = 0; - cifsi->server_eof = i_size_read(inode) - len; - truncate_setsize(inode, cifsi->server_eof); - fscache_resize_cookie(cifs_inode_cookie(inode), cifsi->server_eof); + truncate_setsize(inode, new_eof); + netfs_resize_file(&cifsi->netfs, new_eof, true); + ictx->zero_point = new_eof; + fscache_resize_cookie(cifs_inode_cookie(inode), new_eof); out_2: filemap_invalidate_unlock(inode->i_mapping); out: @@ -3581,6 +3692,7 @@ static long smb3_insert_range(struct file *file, struct cifs_tcon *tcon, unsigned int xid; struct cifsFileInfo *cfile = file->private_data; struct inode *inode = file_inode(file); + struct cifsInodeInfo *cifsi = CIFS_I(inode); __u64 count, old_eof, new_eof; xid = get_xid(); @@ -3608,6 +3720,7 @@ static long smb3_insert_range(struct file *file, struct cifs_tcon *tcon, goto out_2; truncate_setsize(inode, new_eof); + netfs_resize_file(&cifsi->netfs, i_size_read(inode), true); fscache_resize_cookie(cifs_inode_cookie(inode), i_size_read(inode)); rc = smb2_copychunk_range(xid, cfile, cfile, off, count, off + len); diff --git a/fs/smb/client/smb2pdu.c b/fs/smb/client/smb2pdu.c index 288199f0b987..86f6f35b7f32 100644 --- a/fs/smb/client/smb2pdu.c +++ b/fs/smb/client/smb2pdu.c @@ -195,7 +195,6 @@ cifs_chan_skip_or_disable(struct cifs_ses *ses, pserver = server->primary_server; cifs_signal_cifsd_for_reconnect(pserver, false); skip_terminate: - mutex_unlock(&ses->session_mutex); return -EHOSTDOWN; } @@ -2765,7 +2764,14 @@ int smb311_posix_mkdir(const unsigned int xid, struct inode *inode, int flags = 0; unsigned int total_len; __le16 *utf16_path = NULL; - struct TCP_Server_Info *server = cifs_pick_channel(ses); + struct TCP_Server_Info *server; + int retries = 0, cur_sleep = 1; + +replay_again: + /* reinitialize for possible replay */ + flags = 0; + n_iov = 2; + server = cifs_pick_channel(ses); cifs_dbg(FYI, "mkdir\n"); @@ -2869,6 +2875,10 @@ int smb311_posix_mkdir(const unsigned int xid, struct inode *inode, /* no need to inc num_remote_opens because we close it just below */ trace_smb3_posix_mkdir_enter(xid, tcon->tid, ses->Suid, full_path, CREATE_NOT_FILE, FILE_WRITE_ATTRIBUTES); + + if (retries) + smb2_set_replay(server, &rqst); + /* resource #4: response buffer */ rc = cifs_send_recv(xid, ses, server, &rqst, &resp_buftype, flags, &rsp_iov); @@ -2906,6 +2916,11 @@ err_free_req: cifs_small_buf_release(req); err_free_path: kfree(utf16_path); + + if (is_replayable_error(rc) && + smb2_should_replay(tcon, &retries, &cur_sleep)) + goto replay_again; + return rc; } @@ -3101,12 +3116,18 @@ SMB2_open(const unsigned int xid, struct cifs_open_parms *oparms, __le16 *path, struct smb2_create_rsp *rsp = NULL; struct cifs_tcon *tcon = oparms->tcon; struct cifs_ses *ses = tcon->ses; - struct TCP_Server_Info *server = cifs_pick_channel(ses); + struct TCP_Server_Info *server; struct kvec iov[SMB2_CREATE_IOV_SIZE]; struct kvec rsp_iov = {NULL, 0}; int resp_buftype = CIFS_NO_BUFFER; int rc = 0; int flags = 0; + int retries = 0, cur_sleep = 1; + +replay_again: + /* reinitialize for possible replay */ + flags = 0; + server = cifs_pick_channel(ses); cifs_dbg(FYI, "create/open\n"); if (!ses || !server) @@ -3128,6 +3149,9 @@ SMB2_open(const unsigned int xid, struct cifs_open_parms *oparms, __le16 *path, trace_smb3_open_enter(xid, tcon->tid, tcon->ses->Suid, oparms->path, oparms->create_options, oparms->desired_access); + if (retries) + smb2_set_replay(server, &rqst); + rc = cifs_send_recv(xid, ses, server, &rqst, &resp_buftype, flags, &rsp_iov); @@ -3181,6 +3205,11 @@ SMB2_open(const unsigned int xid, struct cifs_open_parms *oparms, __le16 *path, creat_exit: SMB2_open_free(&rqst); free_rsp_buf(resp_buftype, rsp); + + if (is_replayable_error(rc) && + smb2_should_replay(tcon, &retries, &cur_sleep)) + goto replay_again; + return rc; } @@ -3305,15 +3334,7 @@ SMB2_ioctl(const unsigned int xid, struct cifs_tcon *tcon, u64 persistent_fid, int resp_buftype = CIFS_NO_BUFFER; int rc = 0; int flags = 0; - - cifs_dbg(FYI, "SMB2 IOCTL\n"); - - if (out_data != NULL) - *out_data = NULL; - - /* zero out returned data len, in case of error */ - if (plen) - *plen = 0; + int retries = 0, cur_sleep = 1; if (!tcon) return -EIO; @@ -3322,10 +3343,23 @@ SMB2_ioctl(const unsigned int xid, struct cifs_tcon *tcon, u64 persistent_fid, if (!ses) return -EIO; +replay_again: + /* reinitialize for possible replay */ + flags = 0; server = cifs_pick_channel(ses); + if (!server) return -EIO; + cifs_dbg(FYI, "SMB2 IOCTL\n"); + + if (out_data != NULL) + *out_data = NULL; + + /* zero out returned data len, in case of error */ + if (plen) + *plen = 0; + if (smb3_encryption_required(tcon)) flags |= CIFS_TRANSFORM_REQ; @@ -3340,6 +3374,9 @@ SMB2_ioctl(const unsigned int xid, struct cifs_tcon *tcon, u64 persistent_fid, if (rc) goto ioctl_exit; + if (retries) + smb2_set_replay(server, &rqst); + rc = cifs_send_recv(xid, ses, server, &rqst, &resp_buftype, flags, &rsp_iov); @@ -3409,6 +3446,11 @@ SMB2_ioctl(const unsigned int xid, struct cifs_tcon *tcon, u64 persistent_fid, ioctl_exit: SMB2_ioctl_free(&rqst); free_rsp_buf(resp_buftype, rsp); + + if (is_replayable_error(rc) && + smb2_should_replay(tcon, &retries, &cur_sleep)) + goto replay_again; + return rc; } @@ -3480,13 +3522,20 @@ __SMB2_close(const unsigned int xid, struct cifs_tcon *tcon, struct smb_rqst rqst; struct smb2_close_rsp *rsp = NULL; struct cifs_ses *ses = tcon->ses; - struct TCP_Server_Info *server = cifs_pick_channel(ses); + struct TCP_Server_Info *server; struct kvec iov[1]; struct kvec rsp_iov; int resp_buftype = CIFS_NO_BUFFER; int rc = 0; int flags = 0; bool query_attrs = false; + int retries = 0, cur_sleep = 1; + +replay_again: + /* reinitialize for possible replay */ + flags = 0; + query_attrs = false; + server = cifs_pick_channel(ses); cifs_dbg(FYI, "Close\n"); @@ -3512,6 +3561,9 @@ __SMB2_close(const unsigned int xid, struct cifs_tcon *tcon, if (rc) goto close_exit; + if (retries) + smb2_set_replay(server, &rqst); + rc = cifs_send_recv(xid, ses, server, &rqst, &resp_buftype, flags, &rsp_iov); rsp = (struct smb2_close_rsp *)rsp_iov.iov_base; @@ -3545,6 +3597,11 @@ close_exit: cifs_dbg(VFS, "handle cancelled close fid 0x%llx returned error %d\n", persistent_fid, tmp_rc); } + + if (is_replayable_error(rc) && + smb2_should_replay(tcon, &retries, &cur_sleep)) + goto replay_again; + return rc; } @@ -3675,12 +3732,19 @@ query_info(const unsigned int xid, struct cifs_tcon *tcon, struct TCP_Server_Info *server; int flags = 0; bool allocated = false; + int retries = 0, cur_sleep = 1; cifs_dbg(FYI, "Query Info\n"); if (!ses) return -EIO; + +replay_again: + /* reinitialize for possible replay */ + flags = 0; + allocated = false; server = cifs_pick_channel(ses); + if (!server) return -EIO; @@ -3702,6 +3766,9 @@ query_info(const unsigned int xid, struct cifs_tcon *tcon, trace_smb3_query_info_enter(xid, persistent_fid, tcon->tid, ses->Suid, info_class, (__u32)info_type); + if (retries) + smb2_set_replay(server, &rqst); + rc = cifs_send_recv(xid, ses, server, &rqst, &resp_buftype, flags, &rsp_iov); rsp = (struct smb2_query_info_rsp *)rsp_iov.iov_base; @@ -3744,6 +3811,11 @@ query_info(const unsigned int xid, struct cifs_tcon *tcon, qinf_exit: SMB2_query_info_free(&rqst); free_rsp_buf(resp_buftype, rsp); + + if (is_replayable_error(rc) && + smb2_should_replay(tcon, &retries, &cur_sleep)) + goto replay_again; + return rc; } @@ -3844,7 +3916,7 @@ SMB2_change_notify(const unsigned int xid, struct cifs_tcon *tcon, u32 *plen /* returned data len */) { struct cifs_ses *ses = tcon->ses; - struct TCP_Server_Info *server = cifs_pick_channel(ses); + struct TCP_Server_Info *server; struct smb_rqst rqst; struct smb2_change_notify_rsp *smb_rsp; struct kvec iov[1]; @@ -3852,6 +3924,12 @@ SMB2_change_notify(const unsigned int xid, struct cifs_tcon *tcon, int resp_buftype = CIFS_NO_BUFFER; int flags = 0; int rc = 0; + int retries = 0, cur_sleep = 1; + +replay_again: + /* reinitialize for possible replay */ + flags = 0; + server = cifs_pick_channel(ses); cifs_dbg(FYI, "change notify\n"); if (!ses || !server) @@ -3876,6 +3954,10 @@ SMB2_change_notify(const unsigned int xid, struct cifs_tcon *tcon, trace_smb3_notify_enter(xid, persistent_fid, tcon->tid, ses->Suid, (u8)watch_tree, completion_filter); + + if (retries) + smb2_set_replay(server, &rqst); + rc = cifs_send_recv(xid, ses, server, &rqst, &resp_buftype, flags, &rsp_iov); @@ -3910,6 +3992,11 @@ SMB2_change_notify(const unsigned int xid, struct cifs_tcon *tcon, if (rqst.rq_iov) cifs_small_buf_release(rqst.rq_iov[0].iov_base); /* request */ free_rsp_buf(resp_buftype, rsp_iov.iov_base); + + if (is_replayable_error(rc) && + smb2_should_replay(tcon, &retries, &cur_sleep)) + goto replay_again; + return rc; } @@ -4152,10 +4239,16 @@ SMB2_flush(const unsigned int xid, struct cifs_tcon *tcon, u64 persistent_fid, struct smb_rqst rqst; struct kvec iov[1]; struct kvec rsp_iov = {NULL, 0}; - struct TCP_Server_Info *server = cifs_pick_channel(ses); + struct TCP_Server_Info *server; int resp_buftype = CIFS_NO_BUFFER; int flags = 0; int rc = 0; + int retries = 0, cur_sleep = 1; + +replay_again: + /* reinitialize for possible replay */ + flags = 0; + server = cifs_pick_channel(ses); cifs_dbg(FYI, "flush\n"); if (!ses || !(ses->server)) @@ -4175,6 +4268,10 @@ SMB2_flush(const unsigned int xid, struct cifs_tcon *tcon, u64 persistent_fid, goto flush_exit; trace_smb3_flush_enter(xid, persistent_fid, tcon->tid, ses->Suid); + + if (retries) + smb2_set_replay(server, &rqst); + rc = cifs_send_recv(xid, ses, server, &rqst, &resp_buftype, flags, &rsp_iov); @@ -4189,6 +4286,11 @@ SMB2_flush(const unsigned int xid, struct cifs_tcon *tcon, u64 persistent_fid, flush_exit: SMB2_flush_free(&rqst); free_rsp_buf(resp_buftype, rsp_iov.iov_base); + + if (is_replayable_error(rc) && + smb2_should_replay(tcon, &retries, &cur_sleep)) + goto replay_again; + return rc; } @@ -4668,7 +4770,7 @@ smb2_async_writev(struct cifs_writedata *wdata, struct cifs_io_parms *io_parms = NULL; int credit_request; - if (!wdata->server) + if (!wdata->server || wdata->replay) server = wdata->server = cifs_pick_channel(tcon->ses); /* @@ -4753,6 +4855,8 @@ smb2_async_writev(struct cifs_writedata *wdata, rqst.rq_nvec = 1; rqst.rq_iter = wdata->iter; rqst.rq_iter_size = iov_iter_count(&rqst.rq_iter); + if (wdata->replay) + smb2_set_replay(server, &rqst); #ifdef CONFIG_CIFS_SMB_DIRECT if (wdata->mr) iov[0].iov_len += sizeof(struct smbd_buffer_descriptor_v1); @@ -4826,18 +4930,21 @@ SMB2_write(const unsigned int xid, struct cifs_io_parms *io_parms, int flags = 0; unsigned int total_len; struct TCP_Server_Info *server; + int retries = 0, cur_sleep = 1; +replay_again: + /* reinitialize for possible replay */ + flags = 0; *nbytes = 0; - - if (n_vec < 1) - return rc; - if (!io_parms->server) io_parms->server = cifs_pick_channel(io_parms->tcon->ses); server = io_parms->server; if (server == NULL) return -ECONNABORTED; + if (n_vec < 1) + return rc; + rc = smb2_plain_req_init(SMB2_WRITE, io_parms->tcon, server, (void **) &req, &total_len); if (rc) @@ -4871,6 +4978,9 @@ SMB2_write(const unsigned int xid, struct cifs_io_parms *io_parms, rqst.rq_iov = iov; rqst.rq_nvec = n_vec + 1; + if (retries) + smb2_set_replay(server, &rqst); + rc = cifs_send_recv(xid, io_parms->tcon->ses, server, &rqst, &resp_buftype, flags, &rsp_iov); @@ -4895,6 +5005,11 @@ SMB2_write(const unsigned int xid, struct cifs_io_parms *io_parms, cifs_small_buf_release(req); free_rsp_buf(resp_buftype, rsp); + + if (is_replayable_error(rc) && + smb2_should_replay(io_parms->tcon, &retries, &cur_sleep)) + goto replay_again; + return rc; } @@ -5206,8 +5321,14 @@ SMB2_query_directory(const unsigned int xid, struct cifs_tcon *tcon, struct kvec rsp_iov; int rc = 0; struct cifs_ses *ses = tcon->ses; - struct TCP_Server_Info *server = cifs_pick_channel(ses); + struct TCP_Server_Info *server; int flags = 0; + int retries = 0, cur_sleep = 1; + +replay_again: + /* reinitialize for possible replay */ + flags = 0; + server = cifs_pick_channel(ses); if (!ses || !(ses->server)) return -EIO; @@ -5227,6 +5348,9 @@ SMB2_query_directory(const unsigned int xid, struct cifs_tcon *tcon, if (rc) goto qdir_exit; + if (retries) + smb2_set_replay(server, &rqst); + rc = cifs_send_recv(xid, ses, server, &rqst, &resp_buftype, flags, &rsp_iov); rsp = (struct smb2_query_directory_rsp *)rsp_iov.iov_base; @@ -5261,6 +5385,11 @@ SMB2_query_directory(const unsigned int xid, struct cifs_tcon *tcon, qdir_exit: SMB2_query_directory_free(&rqst); free_rsp_buf(resp_buftype, rsp); + + if (is_replayable_error(rc) && + smb2_should_replay(tcon, &retries, &cur_sleep)) + goto replay_again; + return rc; } @@ -5327,8 +5456,14 @@ send_set_info(const unsigned int xid, struct cifs_tcon *tcon, int rc = 0; int resp_buftype; struct cifs_ses *ses = tcon->ses; - struct TCP_Server_Info *server = cifs_pick_channel(ses); + struct TCP_Server_Info *server; int flags = 0; + int retries = 0, cur_sleep = 1; + +replay_again: + /* reinitialize for possible replay */ + flags = 0; + server = cifs_pick_channel(ses); if (!ses || !server) return -EIO; @@ -5356,6 +5491,8 @@ send_set_info(const unsigned int xid, struct cifs_tcon *tcon, return rc; } + if (retries) + smb2_set_replay(server, &rqst); rc = cifs_send_recv(xid, ses, server, &rqst, &resp_buftype, flags, @@ -5371,6 +5508,11 @@ send_set_info(const unsigned int xid, struct cifs_tcon *tcon, free_rsp_buf(resp_buftype, rsp); kfree(iov); + + if (is_replayable_error(rc) && + smb2_should_replay(tcon, &retries, &cur_sleep)) + goto replay_again; + return rc; } @@ -5423,12 +5565,18 @@ SMB2_oplock_break(const unsigned int xid, struct cifs_tcon *tcon, int rc; struct smb2_oplock_break *req = NULL; struct cifs_ses *ses = tcon->ses; - struct TCP_Server_Info *server = cifs_pick_channel(ses); + struct TCP_Server_Info *server; int flags = CIFS_OBREAK_OP; unsigned int total_len; struct kvec iov[1]; struct kvec rsp_iov; int resp_buf_type; + int retries = 0, cur_sleep = 1; + +replay_again: + /* reinitialize for possible replay */ + flags = CIFS_OBREAK_OP; + server = cifs_pick_channel(ses); cifs_dbg(FYI, "SMB2_oplock_break\n"); rc = smb2_plain_req_init(SMB2_OPLOCK_BREAK, tcon, server, @@ -5453,15 +5601,21 @@ SMB2_oplock_break(const unsigned int xid, struct cifs_tcon *tcon, rqst.rq_iov = iov; rqst.rq_nvec = 1; + if (retries) + smb2_set_replay(server, &rqst); + rc = cifs_send_recv(xid, ses, server, &rqst, &resp_buf_type, flags, &rsp_iov); cifs_small_buf_release(req); - if (rc) { cifs_stats_fail_inc(tcon, SMB2_OPLOCK_BREAK_HE); cifs_dbg(FYI, "Send error in Oplock Break = %d\n", rc); } + if (is_replayable_error(rc) && + smb2_should_replay(tcon, &retries, &cur_sleep)) + goto replay_again; + return rc; } @@ -5547,9 +5701,15 @@ SMB311_posix_qfs_info(const unsigned int xid, struct cifs_tcon *tcon, int rc = 0; int resp_buftype; struct cifs_ses *ses = tcon->ses; - struct TCP_Server_Info *server = cifs_pick_channel(ses); + struct TCP_Server_Info *server; FILE_SYSTEM_POSIX_INFO *info = NULL; int flags = 0; + int retries = 0, cur_sleep = 1; + +replay_again: + /* reinitialize for possible replay */ + flags = 0; + server = cifs_pick_channel(ses); rc = build_qfs_info_req(&iov, tcon, server, FS_POSIX_INFORMATION, @@ -5565,6 +5725,9 @@ SMB311_posix_qfs_info(const unsigned int xid, struct cifs_tcon *tcon, rqst.rq_iov = &iov; rqst.rq_nvec = 1; + if (retries) + smb2_set_replay(server, &rqst); + rc = cifs_send_recv(xid, ses, server, &rqst, &resp_buftype, flags, &rsp_iov); free_qfs_info_req(&iov); @@ -5584,6 +5747,11 @@ SMB311_posix_qfs_info(const unsigned int xid, struct cifs_tcon *tcon, posix_qfsinf_exit: free_rsp_buf(resp_buftype, rsp_iov.iov_base); + + if (is_replayable_error(rc) && + smb2_should_replay(tcon, &retries, &cur_sleep)) + goto replay_again; + return rc; } @@ -5598,9 +5766,15 @@ SMB2_QFS_info(const unsigned int xid, struct cifs_tcon *tcon, int rc = 0; int resp_buftype; struct cifs_ses *ses = tcon->ses; - struct TCP_Server_Info *server = cifs_pick_channel(ses); + struct TCP_Server_Info *server; struct smb2_fs_full_size_info *info = NULL; int flags = 0; + int retries = 0, cur_sleep = 1; + +replay_again: + /* reinitialize for possible replay */ + flags = 0; + server = cifs_pick_channel(ses); rc = build_qfs_info_req(&iov, tcon, server, FS_FULL_SIZE_INFORMATION, @@ -5616,6 +5790,9 @@ SMB2_QFS_info(const unsigned int xid, struct cifs_tcon *tcon, rqst.rq_iov = &iov; rqst.rq_nvec = 1; + if (retries) + smb2_set_replay(server, &rqst); + rc = cifs_send_recv(xid, ses, server, &rqst, &resp_buftype, flags, &rsp_iov); free_qfs_info_req(&iov); @@ -5635,6 +5812,11 @@ SMB2_QFS_info(const unsigned int xid, struct cifs_tcon *tcon, qfsinf_exit: free_rsp_buf(resp_buftype, rsp_iov.iov_base); + + if (is_replayable_error(rc) && + smb2_should_replay(tcon, &retries, &cur_sleep)) + goto replay_again; + return rc; } @@ -5649,9 +5831,15 @@ SMB2_QFS_attr(const unsigned int xid, struct cifs_tcon *tcon, int rc = 0; int resp_buftype, max_len, min_len; struct cifs_ses *ses = tcon->ses; - struct TCP_Server_Info *server = cifs_pick_channel(ses); + struct TCP_Server_Info *server; unsigned int rsp_len, offset; int flags = 0; + int retries = 0, cur_sleep = 1; + +replay_again: + /* reinitialize for possible replay */ + flags = 0; + server = cifs_pick_channel(ses); if (level == FS_DEVICE_INFORMATION) { max_len = sizeof(FILE_SYSTEM_DEVICE_INFO); @@ -5683,6 +5871,9 @@ SMB2_QFS_attr(const unsigned int xid, struct cifs_tcon *tcon, rqst.rq_iov = &iov; rqst.rq_nvec = 1; + if (retries) + smb2_set_replay(server, &rqst); + rc = cifs_send_recv(xid, ses, server, &rqst, &resp_buftype, flags, &rsp_iov); free_qfs_info_req(&iov); @@ -5720,6 +5911,11 @@ SMB2_QFS_attr(const unsigned int xid, struct cifs_tcon *tcon, qfsattr_exit: free_rsp_buf(resp_buftype, rsp_iov.iov_base); + + if (is_replayable_error(rc) && + smb2_should_replay(tcon, &retries, &cur_sleep)) + goto replay_again; + return rc; } @@ -5737,7 +5933,13 @@ smb2_lockv(const unsigned int xid, struct cifs_tcon *tcon, unsigned int count; int flags = CIFS_NO_RSP_BUF; unsigned int total_len; - struct TCP_Server_Info *server = cifs_pick_channel(tcon->ses); + struct TCP_Server_Info *server; + int retries = 0, cur_sleep = 1; + +replay_again: + /* reinitialize for possible replay */ + flags = CIFS_NO_RSP_BUF; + server = cifs_pick_channel(tcon->ses); cifs_dbg(FYI, "smb2_lockv num lock %d\n", num_lock); @@ -5768,6 +5970,9 @@ smb2_lockv(const unsigned int xid, struct cifs_tcon *tcon, rqst.rq_iov = iov; rqst.rq_nvec = 2; + if (retries) + smb2_set_replay(server, &rqst); + rc = cifs_send_recv(xid, tcon->ses, server, &rqst, &resp_buf_type, flags, &rsp_iov); @@ -5779,6 +5984,10 @@ smb2_lockv(const unsigned int xid, struct cifs_tcon *tcon, tcon->ses->Suid, rc); } + if (is_replayable_error(rc) && + smb2_should_replay(tcon, &retries, &cur_sleep)) + goto replay_again; + return rc; } diff --git a/fs/smb/client/smb2proto.h b/fs/smb/client/smb2proto.h index 0034b537b0b3..b3069911e9dd 100644 --- a/fs/smb/client/smb2proto.h +++ b/fs/smb/client/smb2proto.h @@ -122,6 +122,11 @@ extern unsigned long smb_rqst_len(struct TCP_Server_Info *server, extern void smb2_set_next_command(struct cifs_tcon *tcon, struct smb_rqst *rqst); extern void smb2_set_related(struct smb_rqst *rqst); +extern void smb2_set_replay(struct TCP_Server_Info *server, + struct smb_rqst *rqst); +extern bool smb2_should_replay(struct cifs_tcon *tcon, + int *pretries, + int *pcur_sleep); /* * SMB2 Worker functions - most of protocol specific implementation details diff --git a/fs/smb/client/smbencrypt.c b/fs/smb/client/smbencrypt.c index f0ce26414f17..1d1ee9f18f37 100644 --- a/fs/smb/client/smbencrypt.c +++ b/fs/smb/client/smbencrypt.c @@ -26,13 +26,6 @@ #include "cifsproto.h" #include "../common/md4.h" -#ifndef false -#define false 0 -#endif -#ifndef true -#define true 1 -#endif - /* following came from the other byteorder.h to avoid include conflicts */ #define CVAL(buf,pos) (((unsigned char *)(buf))[pos]) #define SSVALX(buf,pos,val) (CVAL(buf,pos)=(val)&0xFF,CVAL(buf,pos+1)=(val)>>8) diff --git a/fs/smb/client/transport.c b/fs/smb/client/transport.c index 4f717ad7c21b..e00278fcfa4f 100644 --- a/fs/smb/client/transport.c +++ b/fs/smb/client/transport.c @@ -400,10 +400,17 @@ unmask: server->conn_id, server->hostname); } smbd_done: - if (rc < 0 && rc != -EINTR) + /* + * there's hardly any use for the layers above to know the + * actual error code here. All they should do at this point is + * to retry the connection and hope it goes away. + */ + if (rc < 0 && rc != -EINTR && rc != -EAGAIN) { cifs_server_dbg(VFS, "Error %d sending data on socket to server\n", rc); - else if (rc > 0) + rc = -ECONNABORTED; + cifs_signal_cifsd_for_reconnect(server, false); + } else if (rc > 0) rc = 0; out: cifs_in_send_dec(server); @@ -1026,6 +1033,9 @@ struct TCP_Server_Info *cifs_pick_channel(struct cifs_ses *ses) if (!server || server->terminate) continue; + if (CIFS_CHAN_NEEDS_RECONNECT(ses, i)) + continue; + /* * strictly speaking, we should pick up req_lock to read * server->in_flight. But it shouldn't matter much here if we diff --git a/fs/smb/server/ksmbd_netlink.h b/fs/smb/server/ksmbd_netlink.h index b7521e41402e..0ebf91ffa236 100644 --- a/fs/smb/server/ksmbd_netlink.h +++ b/fs/smb/server/ksmbd_netlink.h @@ -304,7 +304,8 @@ enum ksmbd_event { KSMBD_EVENT_SPNEGO_AUTHEN_REQUEST, KSMBD_EVENT_SPNEGO_AUTHEN_RESPONSE = 15, - KSMBD_EVENT_MAX + __KSMBD_EVENT_MAX, + KSMBD_EVENT_MAX = __KSMBD_EVENT_MAX - 1 }; /* diff --git a/fs/smb/server/transport_ipc.c b/fs/smb/server/transport_ipc.c index b49d47bdafc9..f29bb03f0dc4 100644 --- a/fs/smb/server/transport_ipc.c +++ b/fs/smb/server/transport_ipc.c @@ -74,7 +74,7 @@ static int handle_unsupported_event(struct sk_buff *skb, struct genl_info *info) static int handle_generic_event(struct sk_buff *skb, struct genl_info *info); static int ksmbd_ipc_heartbeat_request(void); -static const struct nla_policy ksmbd_nl_policy[KSMBD_EVENT_MAX] = { +static const struct nla_policy ksmbd_nl_policy[KSMBD_EVENT_MAX + 1] = { [KSMBD_EVENT_UNSPEC] = { .len = 0, }, @@ -403,7 +403,7 @@ static int handle_generic_event(struct sk_buff *skb, struct genl_info *info) return -EPERM; #endif - if (type >= KSMBD_EVENT_MAX) { + if (type > KSMBD_EVENT_MAX) { WARN_ON(1); return -EINVAL; } diff --git a/fs/smb/server/transport_tcp.c b/fs/smb/server/transport_tcp.c index 9d4222154dcc..002a3f0dc7c5 100644 --- a/fs/smb/server/transport_tcp.c +++ b/fs/smb/server/transport_tcp.c @@ -365,6 +365,7 @@ static int ksmbd_tcp_readv(struct tcp_transport *t, struct kvec *iov_orig, * @t: TCP transport instance * @buf: buffer to store read data from socket * @to_read: number of bytes to read from socket + * @max_retries: number of retries if reading from socket fails * * Return: on success return number of bytes read from socket, * otherwise return error number @@ -416,6 +417,7 @@ static void tcp_destroy_socket(struct socket *ksmbd_socket) /** * create_socket - create socket for ksmbd/0 + * @iface: interface to bind the created socket to * * Return: 0 on success, error number otherwise */ diff --git a/fs/tracefs/event_inode.c b/fs/tracefs/event_inode.c index 6795fda2af19..110e8a272189 100644 --- a/fs/tracefs/event_inode.c +++ b/fs/tracefs/event_inode.c @@ -34,7 +34,15 @@ static DEFINE_MUTEX(eventfs_mutex); /* Choose something "unique" ;-) */ #define EVENTFS_FILE_INODE_INO 0x12c4e37 -#define EVENTFS_DIR_INODE_INO 0x134b2f5 + +/* Just try to make something consistent and unique */ +static int eventfs_dir_ino(struct eventfs_inode *ei) +{ + if (!ei->ino) + ei->ino = get_next_ino(); + + return ei->ino; +} /* * The eventfs_inode (ei) itself is protected by SRCU. It is released from @@ -54,6 +62,46 @@ enum { #define EVENTFS_MODE_MASK (EVENTFS_SAVE_MODE - 1) +/* + * eventfs_inode reference count management. + * + * NOTE! We count only references from dentries, in the + * form 'dentry->d_fsdata'. There are also references from + * directory inodes ('ti->private'), but the dentry reference + * count is always a superset of the inode reference count. + */ +static void release_ei(struct kref *ref) +{ + struct eventfs_inode *ei = container_of(ref, struct eventfs_inode, kref); + + WARN_ON_ONCE(!ei->is_freed); + + kfree(ei->entry_attrs); + kfree_const(ei->name); + kfree_rcu(ei, rcu); +} + +static inline void put_ei(struct eventfs_inode *ei) +{ + if (ei) + kref_put(&ei->kref, release_ei); +} + +static inline void free_ei(struct eventfs_inode *ei) +{ + if (ei) { + ei->is_freed = 1; + put_ei(ei); + } +} + +static inline struct eventfs_inode *get_ei(struct eventfs_inode *ei) +{ + if (ei) + kref_get(&ei->kref); + return ei; +} + static struct dentry *eventfs_root_lookup(struct inode *dir, struct dentry *dentry, unsigned int flags); @@ -148,33 +196,30 @@ static int eventfs_set_attr(struct mnt_idmap *idmap, struct dentry *dentry, return ret; } -static void update_top_events_attr(struct eventfs_inode *ei, struct dentry *dentry) +static void update_top_events_attr(struct eventfs_inode *ei, struct super_block *sb) { - struct inode *inode; + struct inode *root; /* Only update if the "events" was on the top level */ if (!ei || !(ei->attr.mode & EVENTFS_TOPLEVEL)) return; /* Get the tracefs root inode. */ - inode = d_inode(dentry->d_sb->s_root); - ei->attr.uid = inode->i_uid; - ei->attr.gid = inode->i_gid; + root = d_inode(sb->s_root); + ei->attr.uid = root->i_uid; + ei->attr.gid = root->i_gid; } static void set_top_events_ownership(struct inode *inode) { struct tracefs_inode *ti = get_tracefs(inode); struct eventfs_inode *ei = ti->private; - struct dentry *dentry; /* The top events directory doesn't get automatically updated */ if (!ei || !ei->is_events || !(ei->attr.mode & EVENTFS_TOPLEVEL)) return; - dentry = ei->dentry; - - update_top_events_attr(ei, dentry); + update_top_events_attr(ei, inode->i_sb); if (!(ei->attr.mode & EVENTFS_SAVE_UID)) inode->i_uid = ei->attr.uid; @@ -225,10 +270,11 @@ static struct eventfs_inode *eventfs_find_events(struct dentry *dentry) { struct eventfs_inode *ei; - mutex_lock(&eventfs_mutex); do { - /* The parent always has an ei, except for events itself */ - ei = dentry->d_parent->d_fsdata; + // The parent is stable because we do not do renames + dentry = dentry->d_parent; + // ... and directories always have d_fsdata + ei = dentry->d_fsdata; /* * If the ei is being freed, the ownership of the children @@ -238,12 +284,10 @@ static struct eventfs_inode *eventfs_find_events(struct dentry *dentry) ei = NULL; break; } - - dentry = ei->dentry; + // Walk upwards until you find the events inode } while (!ei->is_events); - mutex_unlock(&eventfs_mutex); - update_top_events_attr(ei, dentry); + update_top_events_attr(ei, dentry->d_sb); return ei; } @@ -273,50 +317,11 @@ static void update_inode_attr(struct dentry *dentry, struct inode *inode, inode->i_gid = attr->gid; } -static void update_gid(struct eventfs_inode *ei, kgid_t gid, int level) -{ - struct eventfs_inode *ei_child; - - /* at most we have events/system/event */ - if (WARN_ON_ONCE(level > 3)) - return; - - ei->attr.gid = gid; - - if (ei->entry_attrs) { - for (int i = 0; i < ei->nr_entries; i++) { - ei->entry_attrs[i].gid = gid; - } - } - - /* - * Only eventfs_inode with dentries are updated, make sure - * all eventfs_inodes are updated. If one of the children - * do not have a dentry, this function must traverse it. - */ - list_for_each_entry_srcu(ei_child, &ei->children, list, - srcu_read_lock_held(&eventfs_srcu)) { - if (!ei_child->dentry) - update_gid(ei_child, gid, level + 1); - } -} - -void eventfs_update_gid(struct dentry *dentry, kgid_t gid) -{ - struct eventfs_inode *ei = dentry->d_fsdata; - int idx; - - idx = srcu_read_lock(&eventfs_srcu); - update_gid(ei, gid, 0); - srcu_read_unlock(&eventfs_srcu, idx); -} - /** - * create_file - create a file in the tracefs filesystem - * @name: the name of the file to create. + * lookup_file - look up a file in the tracefs filesystem + * @dentry: the dentry to look up * @mode: the permission that the file should have. * @attr: saved attributes changed by user - * @parent: parent dentry for this file. * @data: something that the caller will want to get to later on. * @fop: struct file_operations that should be used for this file. * @@ -324,30 +329,25 @@ void eventfs_update_gid(struct dentry *dentry, kgid_t gid) * directory. The inode.i_private pointer will point to @data in the open() * call. */ -static struct dentry *create_file(const char *name, umode_t mode, +static struct dentry *lookup_file(struct eventfs_inode *parent_ei, + struct dentry *dentry, + umode_t mode, struct eventfs_attr *attr, - struct dentry *parent, void *data, + void *data, const struct file_operations *fop) { struct tracefs_inode *ti; - struct dentry *dentry; struct inode *inode; if (!(mode & S_IFMT)) mode |= S_IFREG; if (WARN_ON_ONCE(!S_ISREG(mode))) - return NULL; - - WARN_ON_ONCE(!parent); - dentry = eventfs_start_creating(name, parent); - - if (IS_ERR(dentry)) - return dentry; + return ERR_PTR(-EIO); inode = tracefs_get_inode(dentry->d_sb); if (unlikely(!inode)) - return eventfs_failed_creating(dentry); + return ERR_PTR(-ENOMEM); /* If the user updated the directory's attributes, use them */ update_inode_attr(dentry, inode, attr, mode); @@ -361,32 +361,31 @@ static struct dentry *create_file(const char *name, umode_t mode, ti = get_tracefs(inode); ti->flags |= TRACEFS_EVENT_INODE; - d_instantiate(dentry, inode); - fsnotify_create(dentry->d_parent->d_inode, dentry); - return eventfs_end_creating(dentry); + + // Files have their parent's ei as their fsdata + dentry->d_fsdata = get_ei(parent_ei); + + d_add(dentry, inode); + return NULL; }; /** - * create_dir - create a dir in the tracefs filesystem + * lookup_dir_entry - look up a dir in the tracefs filesystem + * @dentry: the directory to look up * @ei: the eventfs_inode that represents the directory to create - * @parent: parent dentry for this file. * - * This function will create a dentry for a directory represented by + * This function will look up a dentry for a directory represented by * a eventfs_inode. */ -static struct dentry *create_dir(struct eventfs_inode *ei, struct dentry *parent) +static struct dentry *lookup_dir_entry(struct dentry *dentry, + struct eventfs_inode *pei, struct eventfs_inode *ei) { struct tracefs_inode *ti; - struct dentry *dentry; struct inode *inode; - dentry = eventfs_start_creating(ei->name, parent); - if (IS_ERR(dentry)) - return dentry; - inode = tracefs_get_inode(dentry->d_sb); if (unlikely(!inode)) - return eventfs_failed_creating(dentry); + return ERR_PTR(-ENOMEM); /* If the user updated the directory's attributes, use them */ update_inode_attr(dentry, inode, &ei->attr, @@ -396,68 +395,50 @@ static struct dentry *create_dir(struct eventfs_inode *ei, struct dentry *parent inode->i_fop = &eventfs_file_operations; /* All directories will have the same inode number */ - inode->i_ino = EVENTFS_DIR_INODE_INO; + inode->i_ino = eventfs_dir_ino(ei); ti = get_tracefs(inode); ti->flags |= TRACEFS_EVENT_INODE; + /* Only directories have ti->private set to an ei, not files */ + ti->private = ei; - inc_nlink(inode); - d_instantiate(dentry, inode); - inc_nlink(dentry->d_parent->d_inode); - fsnotify_mkdir(dentry->d_parent->d_inode, dentry); - return eventfs_end_creating(dentry); + dentry->d_fsdata = get_ei(ei); + + d_add(dentry, inode); + return NULL; } -static void free_ei(struct eventfs_inode *ei) +static inline struct eventfs_inode *alloc_ei(const char *name) { - kfree_const(ei->name); - kfree(ei->d_children); - kfree(ei->entry_attrs); - kfree(ei); + struct eventfs_inode *ei = kzalloc(sizeof(*ei), GFP_KERNEL); + + if (!ei) + return NULL; + + ei->name = kstrdup_const(name, GFP_KERNEL); + if (!ei->name) { + kfree(ei); + return NULL; + } + kref_init(&ei->kref); + return ei; } /** - * eventfs_set_ei_status_free - remove the dentry reference from an eventfs_inode - * @ti: the tracefs_inode of the dentry + * eventfs_d_release - dentry is going away * @dentry: dentry which has the reference to remove. * * Remove the association between a dentry from an eventfs_inode. */ -void eventfs_set_ei_status_free(struct tracefs_inode *ti, struct dentry *dentry) +void eventfs_d_release(struct dentry *dentry) { - struct eventfs_inode *ei; - int i; - - mutex_lock(&eventfs_mutex); - - ei = dentry->d_fsdata; - if (!ei) - goto out; - - /* This could belong to one of the files of the ei */ - if (ei->dentry != dentry) { - for (i = 0; i < ei->nr_entries; i++) { - if (ei->d_children[i] == dentry) - break; - } - if (WARN_ON_ONCE(i == ei->nr_entries)) - goto out; - ei->d_children[i] = NULL; - } else if (ei->is_freed) { - free_ei(ei); - } else { - ei->dentry = NULL; - } - - dentry->d_fsdata = NULL; - out: - mutex_unlock(&eventfs_mutex); + put_ei(dentry->d_fsdata); } /** - * create_file_dentry - create a dentry for a file of an eventfs_inode + * lookup_file_dentry - create a dentry for a file of an eventfs_inode * @ei: the eventfs_inode that the file will be created under - * @idx: the index into the d_children[] of the @ei + * @idx: the index into the entry_attrs[] of the @ei * @parent: The parent dentry of the created file. * @name: The name of the file to create * @mode: The mode of the file. @@ -468,163 +449,17 @@ void eventfs_set_ei_status_free(struct tracefs_inode *ti, struct dentry *dentry) * address located at @e_dentry. */ static struct dentry * -create_file_dentry(struct eventfs_inode *ei, int idx, - struct dentry *parent, const char *name, umode_t mode, void *data, +lookup_file_dentry(struct dentry *dentry, + struct eventfs_inode *ei, int idx, + umode_t mode, void *data, const struct file_operations *fops) { struct eventfs_attr *attr = NULL; - struct dentry **e_dentry = &ei->d_children[idx]; - struct dentry *dentry; - - WARN_ON_ONCE(!inode_is_locked(parent->d_inode)); - mutex_lock(&eventfs_mutex); - if (ei->is_freed) { - mutex_unlock(&eventfs_mutex); - return NULL; - } - /* If the e_dentry already has a dentry, use it */ - if (*e_dentry) { - dget(*e_dentry); - mutex_unlock(&eventfs_mutex); - return *e_dentry; - } - - /* ei->entry_attrs are protected by SRCU */ if (ei->entry_attrs) attr = &ei->entry_attrs[idx]; - mutex_unlock(&eventfs_mutex); - - dentry = create_file(name, mode, attr, parent, data, fops); - - mutex_lock(&eventfs_mutex); - - if (IS_ERR_OR_NULL(dentry)) { - /* - * When the mutex was released, something else could have - * created the dentry for this e_dentry. In which case - * use that one. - * - * If ei->is_freed is set, the e_dentry is currently on its - * way to being freed, don't return it. If e_dentry is NULL - * it means it was already freed. - */ - if (ei->is_freed) { - dentry = NULL; - } else { - dentry = *e_dentry; - dget(dentry); - } - mutex_unlock(&eventfs_mutex); - return dentry; - } - - if (!*e_dentry && !ei->is_freed) { - *e_dentry = dentry; - dentry->d_fsdata = ei; - } else { - /* - * Should never happen unless we get here due to being freed. - * Otherwise it means two dentries exist with the same name. - */ - WARN_ON_ONCE(!ei->is_freed); - dentry = NULL; - } - mutex_unlock(&eventfs_mutex); - - return dentry; -} - -/** - * eventfs_post_create_dir - post create dir routine - * @ei: eventfs_inode of recently created dir - * - * Map the meta-data of files within an eventfs dir to their parent dentry - */ -static void eventfs_post_create_dir(struct eventfs_inode *ei) -{ - struct eventfs_inode *ei_child; - struct tracefs_inode *ti; - - lockdep_assert_held(&eventfs_mutex); - - /* srcu lock already held */ - /* fill parent-child relation */ - list_for_each_entry_srcu(ei_child, &ei->children, list, - srcu_read_lock_held(&eventfs_srcu)) { - ei_child->d_parent = ei->dentry; - } - - ti = get_tracefs(ei->dentry->d_inode); - ti->private = ei; -} - -/** - * create_dir_dentry - Create a directory dentry for the eventfs_inode - * @pei: The eventfs_inode parent of ei. - * @ei: The eventfs_inode to create the directory for - * @parent: The dentry of the parent of this directory - * - * This creates and attaches a directory dentry to the eventfs_inode @ei. - */ -static struct dentry * -create_dir_dentry(struct eventfs_inode *pei, struct eventfs_inode *ei, - struct dentry *parent) -{ - struct dentry *dentry = NULL; - - WARN_ON_ONCE(!inode_is_locked(parent->d_inode)); - - mutex_lock(&eventfs_mutex); - if (pei->is_freed || ei->is_freed) { - mutex_unlock(&eventfs_mutex); - return NULL; - } - if (ei->dentry) { - /* If the eventfs_inode already has a dentry, use it */ - dentry = ei->dentry; - dget(dentry); - mutex_unlock(&eventfs_mutex); - return dentry; - } - mutex_unlock(&eventfs_mutex); - - dentry = create_dir(ei, parent); - - mutex_lock(&eventfs_mutex); - - if (IS_ERR_OR_NULL(dentry) && !ei->is_freed) { - /* - * When the mutex was released, something else could have - * created the dentry for this e_dentry. In which case - * use that one. - * - * If ei->is_freed is set, the e_dentry is currently on its - * way to being freed. - */ - dentry = ei->dentry; - if (dentry) - dget(dentry); - mutex_unlock(&eventfs_mutex); - return dentry; - } - - if (!ei->dentry && !ei->is_freed) { - ei->dentry = dentry; - eventfs_post_create_dir(ei); - dentry->d_fsdata = ei; - } else { - /* - * Should never happen unless we get here due to being freed. - * Otherwise it means two dentries exist with the same name. - */ - WARN_ON_ONCE(!ei->is_freed); - dentry = NULL; - } - mutex_unlock(&eventfs_mutex); - - return dentry; + return lookup_file(ei, dentry, mode, attr, data, fops); } /** @@ -641,79 +476,50 @@ static struct dentry *eventfs_root_lookup(struct inode *dir, struct dentry *dentry, unsigned int flags) { - const struct file_operations *fops; - const struct eventfs_entry *entry; struct eventfs_inode *ei_child; struct tracefs_inode *ti; struct eventfs_inode *ei; - struct dentry *ei_dentry = NULL; - struct dentry *ret = NULL; - struct dentry *d; const char *name = dentry->d_name.name; - umode_t mode; - void *data; - int idx; - int i; - int r; + struct dentry *result = NULL; ti = get_tracefs(dir); if (!(ti->flags & TRACEFS_EVENT_INODE)) - return NULL; - - /* Grab srcu to prevent the ei from going away */ - idx = srcu_read_lock(&eventfs_srcu); + return ERR_PTR(-EIO); - /* - * Grab the eventfs_mutex to consistent value from ti->private. - * This s - */ mutex_lock(&eventfs_mutex); - ei = READ_ONCE(ti->private); - if (ei && !ei->is_freed) - ei_dentry = READ_ONCE(ei->dentry); - mutex_unlock(&eventfs_mutex); - if (!ei || !ei_dentry) + ei = ti->private; + if (!ei || ei->is_freed) goto out; - data = ei->data; - - list_for_each_entry_srcu(ei_child, &ei->children, list, - srcu_read_lock_held(&eventfs_srcu)) { + list_for_each_entry(ei_child, &ei->children, list) { if (strcmp(ei_child->name, name) != 0) continue; - ret = simple_lookup(dir, dentry, flags); - if (IS_ERR(ret)) + if (ei_child->is_freed) goto out; - d = create_dir_dentry(ei, ei_child, ei_dentry); - dput(d); + result = lookup_dir_entry(dentry, ei, ei_child); goto out; } - for (i = 0; i < ei->nr_entries; i++) { - entry = &ei->entries[i]; - if (strcmp(name, entry->name) == 0) { - void *cdata = data; - mutex_lock(&eventfs_mutex); - /* If ei->is_freed, then the event itself may be too */ - if (!ei->is_freed) - r = entry->callback(name, &mode, &cdata, &fops); - else - r = -1; - mutex_unlock(&eventfs_mutex); - if (r <= 0) - continue; - ret = simple_lookup(dir, dentry, flags); - if (IS_ERR(ret)) - goto out; - d = create_file_dentry(ei, i, ei_dentry, name, mode, cdata, fops); - dput(d); - break; - } + for (int i = 0; i < ei->nr_entries; i++) { + void *data; + umode_t mode; + const struct file_operations *fops; + const struct eventfs_entry *entry = &ei->entries[i]; + + if (strcmp(name, entry->name) != 0) + continue; + + data = ei->data; + if (entry->callback(name, &mode, &data, &fops) <= 0) + goto out; + + result = lookup_file_dentry(dentry, ei, i, mode, data, fops); + goto out; } out: - srcu_read_unlock(&eventfs_srcu, idx); - return ret; + mutex_unlock(&eventfs_mutex); + return result; } /* @@ -802,7 +608,7 @@ static int eventfs_iterate(struct file *file, struct dir_context *ctx) name = ei_child->name; - ino = EVENTFS_DIR_INODE_INO; + ino = eventfs_dir_ino(ei_child); if (!dir_emit(ctx, name, strlen(name), ino, DT_DIR)) goto out_dec; @@ -863,25 +669,10 @@ struct eventfs_inode *eventfs_create_dir(const char *name, struct eventfs_inode if (!parent) return ERR_PTR(-EINVAL); - ei = kzalloc(sizeof(*ei), GFP_KERNEL); + ei = alloc_ei(name); if (!ei) return ERR_PTR(-ENOMEM); - ei->name = kstrdup_const(name, GFP_KERNEL); - if (!ei->name) { - kfree(ei); - return ERR_PTR(-ENOMEM); - } - - if (size) { - ei->d_children = kcalloc(size, sizeof(*ei->d_children), GFP_KERNEL); - if (!ei->d_children) { - kfree_const(ei->name); - kfree(ei); - return ERR_PTR(-ENOMEM); - } - } - ei->entries = entries; ei->nr_entries = size; ei->data = data; @@ -889,10 +680,8 @@ struct eventfs_inode *eventfs_create_dir(const char *name, struct eventfs_inode INIT_LIST_HEAD(&ei->list); mutex_lock(&eventfs_mutex); - if (!parent->is_freed) { + if (!parent->is_freed) list_add_tail(&ei->list, &parent->children); - ei->d_parent = parent->dentry; - } mutex_unlock(&eventfs_mutex); /* Was the parent freed? */ @@ -932,28 +721,20 @@ struct eventfs_inode *eventfs_create_events_dir(const char *name, struct dentry if (IS_ERR(dentry)) return ERR_CAST(dentry); - ei = kzalloc(sizeof(*ei), GFP_KERNEL); + ei = alloc_ei(name); if (!ei) - goto fail_ei; + goto fail; inode = tracefs_get_inode(dentry->d_sb); if (unlikely(!inode)) goto fail; - if (size) { - ei->d_children = kcalloc(size, sizeof(*ei->d_children), GFP_KERNEL); - if (!ei->d_children) - goto fail; - } - - ei->dentry = dentry; + // Note: we have a ref to the dentry from tracefs_start_creating() + ei->events_dir = dentry; ei->entries = entries; ei->nr_entries = size; ei->is_events = 1; ei->data = data; - ei->name = kstrdup_const(name, GFP_KERNEL); - if (!ei->name) - goto fail; /* Save the ownership of this directory */ uid = d_inode(dentry->d_parent)->i_uid; @@ -984,11 +765,19 @@ struct eventfs_inode *eventfs_create_events_dir(const char *name, struct dentry inode->i_op = &eventfs_root_dir_inode_operations; inode->i_fop = &eventfs_file_operations; - dentry->d_fsdata = ei; + dentry->d_fsdata = get_ei(ei); - /* directory inodes start off with i_nlink == 2 (for "." entry) */ - inc_nlink(inode); + /* + * Keep all eventfs directories with i_nlink == 1. + * Due to the dynamic nature of the dentry creations and not + * wanting to add a pointer to the parent eventfs_inode in the + * eventfs_inode structure, keeping the i_nlink in sync with the + * number of directories would cause too much complexity for + * something not worth much. Keeping directory links at 1 + * tells userspace not to trust the link number. + */ d_instantiate(dentry, inode); + /* The dentry of the "events" parent does keep track though */ inc_nlink(dentry->d_parent->d_inode); fsnotify_mkdir(dentry->d_parent->d_inode, dentry); tracefs_end_creating(dentry); @@ -996,72 +785,11 @@ struct eventfs_inode *eventfs_create_events_dir(const char *name, struct dentry return ei; fail: - kfree(ei->d_children); - kfree(ei); - fail_ei: + free_ei(ei); tracefs_failed_creating(dentry); return ERR_PTR(-ENOMEM); } -static LLIST_HEAD(free_list); - -static void eventfs_workfn(struct work_struct *work) -{ - struct eventfs_inode *ei, *tmp; - struct llist_node *llnode; - - llnode = llist_del_all(&free_list); - llist_for_each_entry_safe(ei, tmp, llnode, llist) { - /* This dput() matches the dget() from unhook_dentry() */ - for (int i = 0; i < ei->nr_entries; i++) { - if (ei->d_children[i]) - dput(ei->d_children[i]); - } - /* This should only get here if it had a dentry */ - if (!WARN_ON_ONCE(!ei->dentry)) - dput(ei->dentry); - } -} - -static DECLARE_WORK(eventfs_work, eventfs_workfn); - -static void free_rcu_ei(struct rcu_head *head) -{ - struct eventfs_inode *ei = container_of(head, struct eventfs_inode, rcu); - - if (ei->dentry) { - /* Do not free the ei until all references of dentry are gone */ - if (llist_add(&ei->llist, &free_list)) - queue_work(system_unbound_wq, &eventfs_work); - return; - } - - /* If the ei doesn't have a dentry, neither should its children */ - for (int i = 0; i < ei->nr_entries; i++) { - WARN_ON_ONCE(ei->d_children[i]); - } - - free_ei(ei); -} - -static void unhook_dentry(struct dentry *dentry) -{ - if (!dentry) - return; - /* - * Need to add a reference to the dentry that is expected by - * simple_recursive_removal(), which will include a dput(). - */ - dget(dentry); - - /* - * Also add a reference for the dput() in eventfs_workfn(). - * That is required as that dput() will free the ei after - * the SRCU grace period is over. - */ - dget(dentry); -} - /** * eventfs_remove_rec - remove eventfs dir or file from list * @ei: eventfs_inode to be removed. @@ -1074,8 +802,6 @@ static void eventfs_remove_rec(struct eventfs_inode *ei, int level) { struct eventfs_inode *ei_child; - if (!ei) - return; /* * Check recursion depth. It should never be greater than 3: * 0 - events/ @@ -1087,28 +813,11 @@ static void eventfs_remove_rec(struct eventfs_inode *ei, int level) return; /* search for nested folders or files */ - list_for_each_entry_srcu(ei_child, &ei->children, list, - lockdep_is_held(&eventfs_mutex)) { - /* Children only have dentry if parent does */ - WARN_ON_ONCE(ei_child->dentry && !ei->dentry); + list_for_each_entry(ei_child, &ei->children, list) eventfs_remove_rec(ei_child, level + 1); - } - - - ei->is_freed = 1; - for (int i = 0; i < ei->nr_entries; i++) { - if (ei->d_children[i]) { - /* Children only have dentry if parent does */ - WARN_ON_ONCE(!ei->dentry); - unhook_dentry(ei->d_children[i]); - } - } - - unhook_dentry(ei->dentry); - - list_del_rcu(&ei->list); - call_srcu(&eventfs_srcu, &ei->rcu, free_rcu_ei); + list_del(&ei->list); + free_ei(ei); } /** @@ -1119,22 +828,12 @@ static void eventfs_remove_rec(struct eventfs_inode *ei, int level) */ void eventfs_remove_dir(struct eventfs_inode *ei) { - struct dentry *dentry; - if (!ei) return; mutex_lock(&eventfs_mutex); - dentry = ei->dentry; eventfs_remove_rec(ei, 0); mutex_unlock(&eventfs_mutex); - - /* - * If any of the ei children has a dentry, then the ei itself - * must have a dentry. - */ - if (dentry) - simple_recursive_removal(dentry, NULL); } /** @@ -1147,7 +846,11 @@ void eventfs_remove_events_dir(struct eventfs_inode *ei) { struct dentry *dentry; - dentry = ei->dentry; + dentry = ei->events_dir; + if (!dentry) + return; + + ei->events_dir = NULL; eventfs_remove_dir(ei); /* @@ -1157,5 +860,6 @@ void eventfs_remove_events_dir(struct eventfs_inode *ei) * sticks around while the other ei->dentry are created * and destroyed dynamically. */ + d_invalidate(dentry); dput(dentry); } diff --git a/fs/tracefs/inode.c b/fs/tracefs/inode.c index e1b172c0e091..d65ffad4c327 100644 --- a/fs/tracefs/inode.c +++ b/fs/tracefs/inode.c @@ -38,8 +38,6 @@ static struct inode *tracefs_alloc_inode(struct super_block *sb) if (!ti) return NULL; - ti->flags = 0; - return &ti->vfs_inode; } @@ -379,21 +377,30 @@ static const struct super_operations tracefs_super_operations = { .show_options = tracefs_show_options, }; -static void tracefs_dentry_iput(struct dentry *dentry, struct inode *inode) +/* + * It would be cleaner if eventfs had its own dentry ops. + * + * Note that d_revalidate is called potentially under RCU, + * so it can't take the eventfs mutex etc. It's fine - if + * we open a file just as it's marked dead, things will + * still work just fine, and just see the old stale case. + */ +static void tracefs_d_release(struct dentry *dentry) { - struct tracefs_inode *ti; + if (dentry->d_fsdata) + eventfs_d_release(dentry); +} - if (!dentry || !inode) - return; +static int tracefs_d_revalidate(struct dentry *dentry, unsigned int flags) +{ + struct eventfs_inode *ei = dentry->d_fsdata; - ti = get_tracefs(inode); - if (ti && ti->flags & TRACEFS_EVENT_INODE) - eventfs_set_ei_status_free(ti, dentry); - iput(inode); + return !(ei && ei->is_freed); } static const struct dentry_operations tracefs_dentry_operations = { - .d_iput = tracefs_dentry_iput, + .d_revalidate = tracefs_d_revalidate, + .d_release = tracefs_d_release, }; static int trace_fill_super(struct super_block *sb, void *data, int silent) @@ -497,75 +504,6 @@ struct dentry *tracefs_end_creating(struct dentry *dentry) return dentry; } -/** - * eventfs_start_creating - start the process of creating a dentry - * @name: Name of the file created for the dentry - * @parent: The parent dentry where this dentry will be created - * - * This is a simple helper function for the dynamically created eventfs - * files. When the directory of the eventfs files are accessed, their - * dentries are created on the fly. This function is used to start that - * process. - */ -struct dentry *eventfs_start_creating(const char *name, struct dentry *parent) -{ - struct dentry *dentry; - int error; - - /* Must always have a parent. */ - if (WARN_ON_ONCE(!parent)) - return ERR_PTR(-EINVAL); - - error = simple_pin_fs(&trace_fs_type, &tracefs_mount, - &tracefs_mount_count); - if (error) - return ERR_PTR(error); - - if (unlikely(IS_DEADDIR(parent->d_inode))) - dentry = ERR_PTR(-ENOENT); - else - dentry = lookup_one_len(name, parent, strlen(name)); - - if (!IS_ERR(dentry) && dentry->d_inode) { - dput(dentry); - dentry = ERR_PTR(-EEXIST); - } - - if (IS_ERR(dentry)) - simple_release_fs(&tracefs_mount, &tracefs_mount_count); - - return dentry; -} - -/** - * eventfs_failed_creating - clean up a failed eventfs dentry creation - * @dentry: The dentry to clean up - * - * If after calling eventfs_start_creating(), a failure is detected, the - * resources created by eventfs_start_creating() needs to be cleaned up. In - * that case, this function should be called to perform that clean up. - */ -struct dentry *eventfs_failed_creating(struct dentry *dentry) -{ - dput(dentry); - simple_release_fs(&tracefs_mount, &tracefs_mount_count); - return NULL; -} - -/** - * eventfs_end_creating - Finish the process of creating a eventfs dentry - * @dentry: The dentry that has successfully been created. - * - * This function is currently just a place holder to match - * eventfs_start_creating(). In case any synchronization needs to be added, - * this function will be used to implement that without having to modify - * the callers of eventfs_start_creating(). - */ -struct dentry *eventfs_end_creating(struct dentry *dentry) -{ - return dentry; -} - /* Find the inode that this will use for default */ static struct inode *instance_inode(struct dentry *parent, struct inode *inode) { @@ -779,7 +717,11 @@ static void init_once(void *foo) { struct tracefs_inode *ti = (struct tracefs_inode *) foo; + /* inode_init_once() calls memset() on the vfs_inode portion */ inode_init_once(&ti->vfs_inode); + + /* Zero out the rest */ + memset_after(ti, 0, vfs_inode); } static int __init tracefs_init(void) diff --git a/fs/tracefs/internal.h b/fs/tracefs/internal.h index 12b7d0150ae9..beb3dcd0e434 100644 --- a/fs/tracefs/internal.h +++ b/fs/tracefs/internal.h @@ -11,9 +11,10 @@ enum { }; struct tracefs_inode { + struct inode vfs_inode; + /* The below gets initialized with memset_after(ti, 0, vfs_inode) */ unsigned long flags; void *private; - struct inode vfs_inode; }; /* @@ -31,42 +32,37 @@ struct eventfs_attr { /* * struct eventfs_inode - hold the properties of the eventfs directories. * @list: link list into the parent directory + * @rcu: Union with @list for freeing + * @children: link list into the child eventfs_inode * @entries: the array of entries representing the files in the directory * @name: the name of the directory to create - * @children: link list into the child eventfs_inode - * @dentry: the dentry of the directory - * @d_parent: pointer to the parent's dentry - * @d_children: The array of dentries to represent the files when created + * @events_dir: the dentry of the events directory * @entry_attrs: Saved mode and ownership of the @d_children - * @attr: Saved mode and ownership of eventfs_inode itself * @data: The private data to pass to the callbacks + * @attr: Saved mode and ownership of eventfs_inode itself * @is_freed: Flag set if the eventfs is on its way to be freed * Note if is_freed is set, then dentry is corrupted. + * @is_events: Flag set for only the top level "events" directory * @nr_entries: The number of items in @entries + * @ino: The saved inode number */ struct eventfs_inode { - struct list_head list; + union { + struct list_head list; + struct rcu_head rcu; + }; + struct list_head children; const struct eventfs_entry *entries; const char *name; - struct list_head children; - struct dentry *dentry; /* Check is_freed to access */ - struct dentry *d_parent; - struct dentry **d_children; + struct dentry *events_dir; struct eventfs_attr *entry_attrs; - struct eventfs_attr attr; void *data; - /* - * Union - used for deletion - * @llist: for calling dput() if needed after RCU - * @rcu: eventfs_inode to delete in RCU - */ - union { - struct llist_node llist; - struct rcu_head rcu; - }; + struct eventfs_attr attr; + struct kref kref; unsigned int is_freed:1; unsigned int is_events:1; unsigned int nr_entries:30; + unsigned int ino; }; static inline struct tracefs_inode *get_tracefs(const struct inode *inode) @@ -78,10 +74,7 @@ struct dentry *tracefs_start_creating(const char *name, struct dentry *parent); struct dentry *tracefs_end_creating(struct dentry *dentry); struct dentry *tracefs_failed_creating(struct dentry *dentry); struct inode *tracefs_get_inode(struct super_block *sb); -struct dentry *eventfs_start_creating(const char *name, struct dentry *parent); -struct dentry *eventfs_failed_creating(struct dentry *dentry); -struct dentry *eventfs_end_creating(struct dentry *dentry); -void eventfs_update_gid(struct dentry *dentry, kgid_t gid); -void eventfs_set_ei_status_free(struct tracefs_inode *ti, struct dentry *dentry); + +void eventfs_d_release(struct dentry *dentry); #endif /* _TRACEFS_INTERNAL_H */ diff --git a/fs/xfs/xfs_super.c b/fs/xfs/xfs_super.c index aff20ddd4a9f..5a2512d20bd0 100644 --- a/fs/xfs/xfs_super.c +++ b/fs/xfs/xfs_super.c @@ -1496,6 +1496,18 @@ xfs_fs_fill_super( mp->m_super = sb; + /* + * Copy VFS mount flags from the context now that all parameter parsing + * is guaranteed to have been completed by either the old mount API or + * the newer fsopen/fsconfig API. + */ + if (fc->sb_flags & SB_RDONLY) + set_bit(XFS_OPSTATE_READONLY, &mp->m_opstate); + if (fc->sb_flags & SB_DIRSYNC) + mp->m_features |= XFS_FEAT_DIRSYNC; + if (fc->sb_flags & SB_SYNCHRONOUS) + mp->m_features |= XFS_FEAT_WSYNC; + error = xfs_fs_validate_params(mp); if (error) return error; @@ -1965,6 +1977,11 @@ static const struct fs_context_operations xfs_context_ops = { .free = xfs_fs_free, }; +/* + * WARNING: do not initialise any parameters in this function that depend on + * mount option parsing having already been performed as this can be called from + * fsopen() before any parameters have been set. + */ static int xfs_init_fs_context( struct fs_context *fc) { @@ -1996,16 +2013,6 @@ static int xfs_init_fs_context( mp->m_logbsize = -1; mp->m_allocsize_log = 16; /* 64k */ - /* - * Copy binary VFS mount flags we are interested in. - */ - if (fc->sb_flags & SB_RDONLY) - set_bit(XFS_OPSTATE_READONLY, &mp->m_opstate); - if (fc->sb_flags & SB_DIRSYNC) - mp->m_features |= XFS_FEAT_DIRSYNC; - if (fc->sb_flags & SB_SYNCHRONOUS) - mp->m_features |= XFS_FEAT_WSYNC; - fc->s_fs_info = mp; fc->ops = &xfs_context_ops; |