Merge branch 'for_linus' of git://git.kernel.org/pub/scm/linux/kernel/git/jack/linux-fs

Pull ext3, reiserfs, udf & isofs fixes from Jan Kara:
 "The contains a bunch of ext3 cleanups and minor improvements, major
  reiserfs locking changes which should hopefully fix deadlocks
  introduced by BKL removal, and udf/isofs changes to refuse mounting fs
  rw instead of mounting it ro automatically which makes eject button
  work as expected for all media (see the changelog for why userspace
  should be ok with this change)"

* 'for_linus' of git://git.kernel.org/pub/scm/linux/kernel/git/jack/linux-fs:
  jbd: use a single printk for jbd_debug()
  reiserfs: locking, release lock around quota operations
  reiserfs: locking, handle nested locks properly
  reiserfs: locking, push write lock out of xattr code
  jbd: relocate assert after state lock in journal_commit_transaction()
  udf: Refuse RW mount of the filesystem instead of making it RO
  udf: Standardize return values in mount sequence
  isofs: Refuse RW mount of the filesystem instead of making it RO
  ext3: allow specifying external journal by pathname mount option
  jbd: remove unneeded semicolon

Documentation/filesystems/ext3.txt

@@ -26,11 +26,12 @@ journal=inum		When a journal already exists, this option is ignored.
 			Otherwise, it specifies the number of the inode which
 			will represent the ext3 file system's journal file.
 
+journal_path=path
 journal_dev=devnum	When the external journal device's major/minor numbers
-			have changed, this option allows the user to specify
+			have changed, these options allow the user to specify
 			the new journal location.  The journal device is
-			identified through its new major/minor numbers encoded
-			in devnum.
+			identified through either its new major/minor numbers
+			encoded in devnum, or via a path to the device.
 
 norecovery		Don't load the journal on mounting. Note that this forces
 noload			mount of inconsistent filesystem, which can lead to

fs/ext3/super.c

@@ -27,6 +27,7 @@
 #include <linux/seq_file.h>
 #include <linux/log2.h>
 #include <linux/cleancache.h>
+#include <linux/namei.h>
 
 #include <asm/uaccess.h>
 
@@ -819,6 +820,7 @@ enum {
 	Opt_user_xattr, Opt_nouser_xattr, Opt_acl, Opt_noacl,
 	Opt_reservation, Opt_noreservation, Opt_noload, Opt_nobh, Opt_bh,
 	Opt_commit, Opt_journal_update, Opt_journal_inum, Opt_journal_dev,
+	Opt_journal_path,
 	Opt_abort, Opt_data_journal, Opt_data_ordered, Opt_data_writeback,
 	Opt_data_err_abort, Opt_data_err_ignore,
 	Opt_usrjquota, Opt_grpjquota, Opt_offusrjquota, Opt_offgrpjquota,
@@ -860,6 +862,7 @@ static const match_table_t tokens = {
 	{Opt_journal_update, "journal=update"},
 	{Opt_journal_inum, "journal=%u"},
 	{Opt_journal_dev, "journal_dev=%u"},
+	{Opt_journal_path, "journal_path=%s"},
 	{Opt_abort, "abort"},
 	{Opt_data_journal, "data=journal"},
 	{Opt_data_ordered, "data=ordered"},
@@ -975,6 +978,11 @@ static int parse_options (char *options, struct super_block *sb,
 	int option;
 	kuid_t uid;
 	kgid_t gid;
+	char *journal_path;
+	struct inode *journal_inode;
+	struct path path;
+	int error;
+
 #ifdef CONFIG_QUOTA
 	int qfmt;
 #endif
@@ -1129,6 +1137,41 @@ static int parse_options (char *options, struct super_block *sb,
 				return 0;
 			*journal_devnum = option;
 			break;
+		case Opt_journal_path:
+			if (is_remount) {
+				ext3_msg(sb, KERN_ERR, "error: cannot specify "
+				       "journal on remount");
+				return 0;
+			}
+
+			journal_path = match_strdup(&args[0]);
+			if (!journal_path) {
+				ext3_msg(sb, KERN_ERR, "error: could not dup "
+					"journal device string");
+				return 0;
+			}
+
+			error = kern_path(journal_path, LOOKUP_FOLLOW, &path);
+			if (error) {
+				ext3_msg(sb, KERN_ERR, "error: could not find "
+					"journal device path: error %d", error);
+				kfree(journal_path);
+				return 0;
+			}
+
+			journal_inode = path.dentry->d_inode;
+			if (!S_ISBLK(journal_inode->i_mode)) {
+				ext3_msg(sb, KERN_ERR, "error: journal path %s "
+					"is not a block device", journal_path);
+				path_put(&path);
+				kfree(journal_path);
+				return 0;
+			}
+
+			*journal_devnum = new_encode_dev(journal_inode->i_rdev);
+			path_put(&path);
+			kfree(journal_path);
+			break;
 		case Opt_noload:
 			set_opt (sbi->s_mount_opt, NOLOAD);
 			break;

fs/isofs/inode.c

@@ -117,8 +117,8 @@ static void destroy_inodecache(void)
 
 static int isofs_remount(struct super_block *sb, int *flags, char *data)
 {
-	/* we probably want a lot more here */
-	*flags |= MS_RDONLY;
+	if (!(*flags & MS_RDONLY))
+		return -EROFS;
 	return 0;
 }
 
@@ -763,15 +763,6 @@ static int isofs_fill_super(struct super_block *s, void *data, int silent)
 	 */
 	s->s_maxbytes = 0x80000000000LL;
 
-	/*
-	 * The CDROM is read-only, has no nodes (devices) on it, and since
-	 * all of the files appear to be owned by root, we really do not want
-	 * to allow suid.  (suid or devices will not show up unless we have
-	 * Rock Ridge extensions)
-	 */
-
-	s->s_flags |= MS_RDONLY /* | MS_NODEV | MS_NOSUID */;
-
 	/* Set this for reference. Its not currently used except on write
 	   which we don't have .. */
 
@@ -1530,6 +1521,9 @@ struct inode *isofs_iget(struct super_block *sb,
 static struct dentry *isofs_mount(struct file_system_type *fs_type,
 	int flags, const char *dev_name, void *data)
 {
+	/* We don't support read-write mounts */
+	if (!(flags & MS_RDONLY))
+		return ERR_PTR(-EACCES);
 	return mount_bdev(fs_type, flags, dev_name, data, isofs_fill_super);
 }
 

fs/jbd/commit.c

@@ -340,13 +340,13 @@ void journal_commit_transaction(journal_t *journal)
 	J_ASSERT(journal->j_committing_transaction == NULL);
 
 	commit_transaction = journal->j_running_transaction;
-	J_ASSERT(commit_transaction->t_state == T_RUNNING);
 
 	trace_jbd_start_commit(journal, commit_transaction);
 	jbd_debug(1, "JBD: starting commit of transaction %d\n",
 			commit_transaction->t_tid);
 
 	spin_lock(&journal->j_state_lock);
+	J_ASSERT(commit_transaction->t_state == T_RUNNING);
 	commit_transaction->t_state = T_LOCKED;
 
 	trace_jbd_commit_locking(journal, commit_transaction);

fs/jbd/journal.c

@@ -90,6 +90,24 @@ static int journal_convert_superblock_v1(journal_t *, journal_superblock_t *);
 static void __journal_abort_soft (journal_t *journal, int errno);
 static const char *journal_dev_name(journal_t *journal, char *buffer);
 
+#ifdef CONFIG_JBD_DEBUG
+void __jbd_debug(int level, const char *file, const char *func,
+		 unsigned int line, const char *fmt, ...)
+{
+	struct va_format vaf;
+	va_list args;
+
+	if (level > journal_enable_debug)
+		return;
+	va_start(args, fmt);
+	vaf.fmt = fmt;
+	vaf.va = &args;
+	printk(KERN_DEBUG "%s: (%s, %u): %pV\n", file, func, line, &vaf);
+	va_end(args);
+}
+EXPORT_SYMBOL(__jbd_debug);
+#endif
+
 /*
  * Helper function used to manage commit timeouts
  */

fs/reiserfs/bitmap.c

@@ -423,8 +423,11 @@ static void _reiserfs_free_block(struct reiserfs_transaction_handle *th,
 	set_sb_free_blocks(rs, sb_free_blocks(rs) + 1);
 
 	journal_mark_dirty(th, s, sbh);
-	if (for_unformatted)
+	if (for_unformatted) {
+		int depth = reiserfs_write_unlock_nested(s);
 		dquot_free_block_nodirty(inode, 1);
+		reiserfs_write_lock_nested(s, depth);
+	}
 }
 
 void reiserfs_free_block(struct reiserfs_transaction_handle *th,
@@ -1128,6 +1131,7 @@ static inline int blocknrs_and_prealloc_arrays_from_search_start
 	b_blocknr_t finish = SB_BLOCK_COUNT(s) - 1;
 	int passno = 0;
 	int nr_allocated = 0;
+	int depth;
 
 	determine_prealloc_size(hint);
 	if (!hint->formatted_node) {
@@ -1137,10 +1141,13 @@ static inline int blocknrs_and_prealloc_arrays_from_search_start
 			       "reiserquota: allocating %d blocks id=%u",
 			       amount_needed, hint->inode->i_uid);
 #endif
+		depth = reiserfs_write_unlock_nested(s);
 		quota_ret =
 		    dquot_alloc_block_nodirty(hint->inode, amount_needed);
-		if (quota_ret)	/* Quota exceeded? */
+		if (quota_ret) {	/* Quota exceeded? */
+			reiserfs_write_lock_nested(s, depth);
 			return QUOTA_EXCEEDED;
+		}
 		if (hint->preallocate && hint->prealloc_size) {
 #ifdef REISERQUOTA_DEBUG
 			reiserfs_debug(s, REISERFS_DEBUG_CODE,
@@ -1153,6 +1160,7 @@ static inline int blocknrs_and_prealloc_arrays_from_search_start
 				hint->preallocate = hint->prealloc_size = 0;
 		}
 		/* for unformatted nodes, force large allocations */
+		reiserfs_write_lock_nested(s, depth);
 	}
 
 	do {
@@ -1181,9 +1189,11 @@ static inline int blocknrs_and_prealloc_arrays_from_search_start
 					       hint->inode->i_uid);
 #endif
 				/* Free not allocated blocks */
+				depth = reiserfs_write_unlock_nested(s);
 				dquot_free_block_nodirty(hint->inode,
 					amount_needed + hint->prealloc_size -
 					nr_allocated);
+				reiserfs_write_lock_nested(s, depth);
 			}
 			while (nr_allocated--)
 				reiserfs_free_block(hint->th, hint->inode,
@@ -1214,10 +1224,13 @@ static inline int blocknrs_and_prealloc_arrays_from_search_start
 			       REISERFS_I(hint->inode)->i_prealloc_count,
 			       hint->inode->i_uid);
 #endif
+
+		depth = reiserfs_write_unlock_nested(s);
 		dquot_free_block_nodirty(hint->inode, amount_needed +
 					 hint->prealloc_size - nr_allocated -
 					 REISERFS_I(hint->inode)->
 					 i_prealloc_count);
+		reiserfs_write_lock_nested(s, depth);
 	}
 
 	return CARRY_ON;
@@ -1340,10 +1353,11 @@ struct buffer_head *reiserfs_read_bitmap_block(struct super_block *sb,
 		                 "reading failed", __func__, block);
 	else {
 		if (buffer_locked(bh)) {
+			int depth;
 			PROC_INFO_INC(sb, scan_bitmap.wait);
-			reiserfs_write_unlock(sb);
+			depth = reiserfs_write_unlock_nested(sb);
 			__wait_on_buffer(bh);
-			reiserfs_write_lock(sb);
+			reiserfs_write_lock_nested(sb, depth);
 		}
 		BUG_ON(!buffer_uptodate(bh));
 		BUG_ON(atomic_read(&bh->b_count) == 0);

fs/reiserfs/dir.c

@@ -71,6 +71,7 @@ int reiserfs_readdir_inode(struct inode *inode, struct dir_context *ctx)
 	char small_buf[32];	/* avoid kmalloc if we can */
 	struct reiserfs_dir_entry de;
 	int ret = 0;
+	int depth;
 
 	reiserfs_write_lock(inode->i_sb);
 
@@ -181,17 +182,17 @@ int reiserfs_readdir_inode(struct inode *inode, struct dir_context *ctx)
 				 * Since filldir might sleep, we can release
 				 * the write lock here for other waiters
 				 */
-				reiserfs_write_unlock(inode->i_sb);
+				depth = reiserfs_write_unlock_nested(inode->i_sb);
 				if (!dir_emit
 				    (ctx, local_buf, d_reclen, d_ino,
 				     DT_UNKNOWN)) {
-					reiserfs_write_lock(inode->i_sb);
+					reiserfs_write_lock_nested(inode->i_sb, depth);
 					if (local_buf != small_buf) {
 						kfree(local_buf);
 					}
 					goto end;
 				}
-				reiserfs_write_lock(inode->i_sb);
+				reiserfs_write_lock_nested(inode->i_sb, depth);
 				if (local_buf != small_buf) {
 					kfree(local_buf);
 				}

fs/reiserfs/fix_node.c

@@ -1022,9 +1022,9 @@ static int get_far_parent(struct tree_balance *tb,
 	if (buffer_locked(*pcom_father)) {
 
 		/* Release the write lock while the buffer is busy */
-		reiserfs_write_unlock(tb->tb_sb);
+		int depth = reiserfs_write_unlock_nested(tb->tb_sb);
 		__wait_on_buffer(*pcom_father);
-		reiserfs_write_lock(tb->tb_sb);
+		reiserfs_write_lock_nested(tb->tb_sb, depth);
 		if (FILESYSTEM_CHANGED_TB(tb)) {
 			brelse(*pcom_father);
 			return REPEAT_SEARCH;
@@ -1929,9 +1929,9 @@ static int get_direct_parent(struct tree_balance *tb, int h)
 		return REPEAT_SEARCH;
 
 	if (buffer_locked(bh)) {
-		reiserfs_write_unlock(tb->tb_sb);
+		int depth = reiserfs_write_unlock_nested(tb->tb_sb);
 		__wait_on_buffer(bh);
-		reiserfs_write_lock(tb->tb_sb);
+		reiserfs_write_lock_nested(tb->tb_sb, depth);
 		if (FILESYSTEM_CHANGED_TB(tb))
 			return REPEAT_SEARCH;
 	}
@@ -1952,6 +1952,7 @@ static int get_neighbors(struct tree_balance *tb, int h)
 	unsigned long son_number;
 	struct super_block *sb = tb->tb_sb;
 	struct buffer_head *bh;
+	int depth;
 
 	PROC_INFO_INC(sb, get_neighbors[h]);
 
@@ -1969,9 +1970,9 @@ static int get_neighbors(struct tree_balance *tb, int h)
 		     tb->FL[h]) ? tb->lkey[h] : B_NR_ITEMS(tb->
 								       FL[h]);
 		son_number = B_N_CHILD_NUM(tb->FL[h], child_position);
-		reiserfs_write_unlock(sb);
+		depth = reiserfs_write_unlock_nested(tb->tb_sb);
 		bh = sb_bread(sb, son_number);
-		reiserfs_write_lock(sb);
+		reiserfs_write_lock_nested(tb->tb_sb, depth);
 		if (!bh)
 			return IO_ERROR;
 		if (FILESYSTEM_CHANGED_TB(tb)) {
@@ -2009,9 +2010,9 @@ static int get_neighbors(struct tree_balance *tb, int h)
 		child_position =
 		    (bh == tb->FR[h]) ? tb->rkey[h] + 1 : 0;
 		son_number = B_N_CHILD_NUM(tb->FR[h], child_position);
-		reiserfs_write_unlock(sb);
+		depth = reiserfs_write_unlock_nested(tb->tb_sb);
 		bh = sb_bread(sb, son_number);
-		reiserfs_write_lock(sb);
+		reiserfs_write_lock_nested(tb->tb_sb, depth);
 		if (!bh)
 			return IO_ERROR;
 		if (FILESYSTEM_CHANGED_TB(tb)) {
@@ -2272,6 +2273,7 @@ static int wait_tb_buffers_until_unlocked(struct tree_balance *tb)
 		}
 
 		if (locked) {
+			int depth;
 #ifdef CONFIG_REISERFS_CHECK
 			repeat_counter++;
 			if ((repeat_counter % 10000) == 0) {
@@ -2286,9 +2288,9 @@ static int wait_tb_buffers_until_unlocked(struct tree_balance *tb)
 				    REPEAT_SEARCH : CARRY_ON;
 			}
 #endif
-			reiserfs_write_unlock(tb->tb_sb);
+			depth = reiserfs_write_unlock_nested(tb->tb_sb);
 			__wait_on_buffer(locked);
-			reiserfs_write_lock(tb->tb_sb);
+			reiserfs_write_lock_nested(tb->tb_sb, depth);
 			if (FILESYSTEM_CHANGED_TB(tb))
 				return REPEAT_SEARCH;
 		}
@@ -2359,9 +2361,9 @@ int fix_nodes(int op_mode, struct tree_balance *tb,
 
 	/* if it possible in indirect_to_direct conversion */
 	if (buffer_locked(tbS0)) {
-		reiserfs_write_unlock(tb->tb_sb);
+		int depth = reiserfs_write_unlock_nested(tb->tb_sb);
 		__wait_on_buffer(tbS0);
-		reiserfs_write_lock(tb->tb_sb);
+		reiserfs_write_lock_nested(tb->tb_sb, depth);
 		if (FILESYSTEM_CHANGED_TB(tb))
 			return REPEAT_SEARCH;
 	}

fs/reiserfs/inode.c

@@ -30,7 +30,6 @@ void reiserfs_evict_inode(struct inode *inode)
 	    JOURNAL_PER_BALANCE_CNT * 2 +
 	    2 * REISERFS_QUOTA_INIT_BLOCKS(inode->i_sb);
 	struct reiserfs_transaction_handle th;
-	int depth;
 	int err;
 
 	if (!inode->i_nlink && !is_bad_inode(inode))
@@ -40,12 +39,13 @@ void reiserfs_evict_inode(struct inode *inode)
 	if (inode->i_nlink)
 		goto no_delete;
 
-	depth = reiserfs_write_lock_once(inode->i_sb);
-
 	/* The = 0 happens when we abort creating a new inode for some reason like lack of space.. */
 	if (!(inode->i_state & I_NEW) && INODE_PKEY(inode)->k_objectid != 0) {	/* also handles bad_inode case */
+
 		reiserfs_delete_xattrs(inode);
 
+		reiserfs_write_lock(inode->i_sb);
+
 		if (journal_begin(&th, inode->i_sb, jbegin_count))
 			goto out;
 		reiserfs_update_inode_transaction(inode);
@@ -57,8 +57,11 @@ void reiserfs_evict_inode(struct inode *inode)
 		/* Do quota update inside a transaction for journaled quotas. We must do that
 		 * after delete_object so that quota updates go into the same transaction as
 		 * stat data deletion */
-		if (!err) 
+		if (!err) {
+			int depth = reiserfs_write_unlock_nested(inode->i_sb);
 			dquot_free_inode(inode);
+			reiserfs_write_lock_nested(inode->i_sb, depth);
+		}
 
 		if (journal_end(&th, inode->i_sb, jbegin_count))
 			goto out;
@@ -72,12 +75,12 @@ void reiserfs_evict_inode(struct inode *inode)
 		/* all items of file are deleted, so we can remove "save" link */
 		remove_save_link(inode, 0 /* not truncate */ );	/* we can't do anything
 								 * about an error here */
+out:
+		reiserfs_write_unlock(inode->i_sb);
 	} else {
 		/* no object items are in the tree */
 		;
 	}
-      out:
-	reiserfs_write_unlock_once(inode->i_sb, depth);
 	clear_inode(inode);	/* note this must go after the journal_end to prevent deadlock */
 	dquot_drop(inode);
 	inode->i_blocks = 0;
@@ -610,7 +613,6 @@ int reiserfs_get_block(struct inode *inode, sector_t block,
 	__le32 *item;
 	int done;
 	int fs_gen;
-	int lock_depth;
 	struct reiserfs_transaction_handle *th = NULL;
 	/* space reserved in transaction batch:
 	   . 3 balancings in direct->indirect conversion
@@ -626,11 +628,11 @@ int reiserfs_get_block(struct inode *inode, sector_t block,
 	loff_t new_offset =
 	    (((loff_t) block) << inode->i_sb->s_blocksize_bits) + 1;
 
-	lock_depth = reiserfs_write_lock_once(inode->i_sb);
+	reiserfs_write_lock(inode->i_sb);
 	version = get_inode_item_key_version(inode);
 
 	if (!file_capable(inode, block)) {
-		reiserfs_write_unlock_once(inode->i_sb, lock_depth);
+		reiserfs_write_unlock(inode->i_sb);
 		return -EFBIG;
 	}
 
@@ -642,7 +644,7 @@ int reiserfs_get_block(struct inode *inode, sector_t block,
 		/* find number of block-th logical block of the file */
 		ret = _get_block_create_0(inode, block, bh_result,
 					  create | GET_BLOCK_READ_DIRECT);
-		reiserfs_write_unlock_once(inode->i_sb, lock_depth);
+		reiserfs_write_unlock(inode->i_sb);
 		return ret;
 	}
 	/*
@@ -760,7 +762,7 @@ int reiserfs_get_block(struct inode *inode, sector_t block,
 		if (!dangle && th)
 			retval = reiserfs_end_persistent_transaction(th);
 
-		reiserfs_write_unlock_once(inode->i_sb, lock_depth);
+		reiserfs_write_unlock(inode->i_sb);
 
 		/* the item was found, so new blocks were not added to the file
 		 ** there is no need to make sure the inode is updated with this
@@ -1011,11 +1013,7 @@ int reiserfs_get_block(struct inode *inode, sector_t block,
 		 * long time.  reschedule if needed and also release the write
 		 * lock for others.
 		 */
-		if (need_resched()) {
-			reiserfs_write_unlock_once(inode->i_sb, lock_depth);
-			schedule();
-			lock_depth = reiserfs_write_lock_once(inode->i_sb);
-		}
+		reiserfs_cond_resched(inode->i_sb);
 
 		retval = search_for_position_by_key(inode->i_sb, &key, &path);
 		if (retval == IO_ERROR) {
@@ -1050,7 +1048,7 @@ int reiserfs_get_block(struct inode *inode, sector_t block,
 			retval = err;
 	}
 
-	reiserfs_write_unlock_once(inode->i_sb, lock_depth);
+	reiserfs_write_unlock(inode->i_sb);
 	reiserfs_check_path(&path);
 	return retval;
 }
@@ -1509,14 +1507,15 @@ struct inode *reiserfs_iget(struct super_block *s, const struct cpu_key *key)
 {
 	struct inode *inode;
 	struct reiserfs_iget_args args;
+	int depth;
 
 	args.objectid = key->on_disk_key.k_objectid;
 	args.dirid = key->on_disk_key.k_dir_id;
-	reiserfs_write_unlock(s);
+	depth = reiserfs_write_unlock_nested(s);
 	inode = iget5_locked(s, key->on_disk_key.k_objectid,
 			     reiserfs_find_actor, reiserfs_init_locked_inode,
 			     (void *)(&args));
-	reiserfs_write_lock(s);
+	reiserfs_write_lock_nested(s, depth);
 	if (!inode)
 		return ERR_PTR(-ENOMEM);
 
@@ -1772,7 +1771,7 @@ int reiserfs_new_inode(struct reiserfs_transaction_handle *th,
 		       struct inode *inode,
 		       struct reiserfs_security_handle *security)
 {
-	struct super_block *sb;
+	struct super_block *sb = dir->i_sb;
 	struct reiserfs_iget_args args;
 	INITIALIZE_PATH(path_to_key);
 	struct cpu_key key;
@@ -1780,12 +1779,13 @@ int reiserfs_new_inode(struct reiserfs_transaction_handle *th,
 	struct stat_data sd;
 	int retval;
 	int err;
+	int depth;
 
 	BUG_ON(!th->t_trans_id);
 
-	reiserfs_write_unlock(inode->i_sb);
+	depth = reiserfs_write_unlock_nested(sb);
 	err = dquot_alloc_inode(inode);
-	reiserfs_write_lock(inode->i_sb);
+	reiserfs_write_lock_nested(sb, depth);
 	if (err)
 		goto out_end_trans;
 	if (!dir->i_nlink) {
@@ -1793,8 +1793,6 @@ int reiserfs_new_inode(struct reiserfs_transaction_handle *th,
 		goto out_bad_inode;
 	}
 
-	sb = dir->i_sb;
-
 	/* item head of new item */
 	ih.ih_key.k_dir_id = reiserfs_choose_packing(dir);
 	ih.ih_key.k_objectid = cpu_to_le32(reiserfs_get_unused_objectid(th));
@@ -1812,10 +1810,10 @@ int reiserfs_new_inode(struct reiserfs_transaction_handle *th,
 	memcpy(INODE_PKEY(inode), &(ih.ih_key), KEY_SIZE);
 	args.dirid = le32_to_cpu(ih.ih_key.k_dir_id);
 
-	reiserfs_write_unlock(inode->i_sb);
+	depth = reiserfs_write_unlock_nested(inode->i_sb);
 	err = insert_inode_locked4(inode, args.objectid,
 			     reiserfs_find_actor, &args);
-	reiserfs_write_lock(inode->i_sb);
+	reiserfs_write_lock_nested(inode->i_sb, depth);
 	if (err) {
 		err = -EINVAL;
 		goto out_bad_inode;
@@ -1941,7 +1939,9 @@ int reiserfs_new_inode(struct reiserfs_transaction_handle *th,
 	}
 
 	if (reiserfs_posixacl(inode->i_sb)) {
+		reiserfs_write_unlock(inode->i_sb);
 		retval = reiserfs_inherit_default_acl(th, dir, dentry, inode);
+		reiserfs_write_lock(inode->i_sb);
 		if (retval) {
 			err = retval;
 			reiserfs_check_path(&path_to_key);
@@ -1956,7 +1956,9 @@ int reiserfs_new_inode(struct reiserfs_transaction_handle *th,
 		inode->i_flags |= S_PRIVATE;
 
 	if (security->name) {
+		reiserfs_write_unlock(inode->i_sb);
 		retval = reiserfs_security_write(th, inode, security);
+		reiserfs_write_lock(inode->i_sb);
 		if (retval) {
 			err = retval;
 			reiserfs_check_path(&path_to_key);
@@ -1982,14 +1984,16 @@ int reiserfs_new_inode(struct reiserfs_transaction_handle *th,
 	INODE_PKEY(inode)->k_objectid = 0;
 
 	/* Quota change must be inside a transaction for journaling */
+	depth = reiserfs_write_unlock_nested(inode->i_sb);
 	dquot_free_inode(inode);
+	reiserfs_write_lock_nested(inode->i_sb, depth);
 
       out_end_trans:
 	journal_end(th, th->t_super, th->t_blocks_allocated);
-	reiserfs_write_unlock(inode->i_sb);
 	/* Drop can be outside and it needs more credits so it's better to have it outside */
+	depth = reiserfs_write_unlock_nested(inode->i_sb);
 	dquot_drop(inode);
-	reiserfs_write_lock(inode->i_sb);
+	reiserfs_write_lock_nested(inode->i_sb, depth);
 	inode->i_flags |= S_NOQUOTA;
 	make_bad_inode(inode);
 
@@ -2103,9 +2107,8 @@ int reiserfs_truncate_file(struct inode *inode, int update_timestamps)
 	int error;
 	struct buffer_head *bh = NULL;
 	int err2;
-	int lock_depth;
 
-	lock_depth = reiserfs_write_lock_once(inode->i_sb);
+	reiserfs_write_lock(inode->i_sb);
 
 	if (inode->i_size > 0) {
 		error = grab_tail_page(inode, &page, &bh);
@@ -2174,7 +2177,7 @@ int reiserfs_truncate_file(struct inode *inode, int update_timestamps)
 		page_cache_release(page);
 	}
 
-	reiserfs_write_unlock_once(inode->i_sb, lock_depth);
+	reiserfs_write_unlock(inode->i_sb);
 
 	return 0;
       out:
@@ -2183,7 +2186,7 @@ int reiserfs_truncate_file(struct inode *inode, int update_timestamps)
 		page_cache_release(page);
 	}
 
-	reiserfs_write_unlock_once(inode->i_sb, lock_depth);
+	reiserfs_write_unlock(inode->i_sb);
 
 	return error;
 }
@@ -2648,10 +2651,11 @@ int __reiserfs_write_begin(struct page *page, unsigned from, unsigned len)
 	struct inode *inode = page->mapping->host;
 	int ret;
 	int old_ref = 0;
+	int depth;
 
-	reiserfs_write_unlock(inode->i_sb);
+	depth = reiserfs_write_unlock_nested(inode->i_sb);
 	reiserfs_wait_on_write_block(inode->i_sb);
-	reiserfs_write_lock(inode->i_sb);
+	reiserfs_write_lock_nested(inode->i_sb, depth);
 
 	fix_tail_page_for_writing(page);
 	if (reiserfs_transaction_running(inode->i_sb)) {
@@ -2708,7 +2712,6 @@ static int reiserfs_write_end(struct file *file, struct address_space *mapping,
 	int update_sd = 0;
 	struct reiserfs_transaction_handle *th;
 	unsigned start;
-	int lock_depth = 0;
 	bool locked = false;
 
 	if ((unsigned long)fsdata & AOP_FLAG_CONT_EXPAND)
@@ -2737,7 +2740,7 @@ static int reiserfs_write_end(struct file *file, struct address_space *mapping,
 	 */
 	if (pos + copied > inode->i_size) {
 		struct reiserfs_transaction_handle myth;
-		lock_depth = reiserfs_write_lock_once(inode->i_sb);
+		reiserfs_write_lock(inode->i_sb);
 		locked = true;
 		/* If the file have grown beyond the border where it
 		   can have a tail, unmark it as needing a tail
@@ -2768,7 +2771,7 @@ static int reiserfs_write_end(struct file *file, struct address_space *mapping,
 	}
 	if (th) {
 		if (!locked) {
-			lock_depth = reiserfs_write_lock_once(inode->i_sb);
+			reiserfs_write_lock(inode->i_sb);
 			locked = true;
 		}
 		if (!update_sd)
@@ -2780,7 +2783,7 @@ static int reiserfs_write_end(struct file *file, struct address_space *mapping,
 
       out:
 	if (locked)
-		reiserfs_write_unlock_once(inode->i_sb, lock_depth);
+		reiserfs_write_unlock(inode->i_sb);
 	unlock_page(page);
 	page_cache_release(page);
 
@@ -2790,7 +2793,7 @@ static int reiserfs_write_end(struct file *file, struct address_space *mapping,
 	return ret == 0 ? copied : ret;
 
       journal_error:
-	reiserfs_write_unlock_once(inode->i_sb, lock_depth);
+	reiserfs_write_unlock(inode->i_sb);
 	locked = false;
 	if (th) {
 		if (!update_sd)
@@ -2808,10 +2811,11 @@ int reiserfs_commit_write(struct file *f, struct page *page,
 	int ret = 0;
 	int update_sd = 0;
 	struct reiserfs_transaction_handle *th = NULL;
+	int depth;
 
-	reiserfs_write_unlock(inode->i_sb);
+	depth = reiserfs_write_unlock_nested(inode->i_sb);
 	reiserfs_wait_on_write_block(inode->i_sb);
-	reiserfs_write_lock(inode->i_sb);
+	reiserfs_write_lock_nested(inode->i_sb, depth);
 
 	if (reiserfs_transaction_running(inode->i_sb)) {
 		th = current->journal_info;
@@ -3110,7 +3114,6 @@ int reiserfs_setattr(struct dentry *dentry, struct iattr *attr)
 {
 	struct inode *inode = dentry->d_inode;
 	unsigned int ia_valid;
-	int depth;
 	int error;
 
 	error = inode_change_ok(inode, attr);
@@ -3122,13 +3125,14 @@ int reiserfs_setattr(struct dentry *dentry, struct iattr *attr)
 
 	if (is_quota_modification(inode, attr))
 		dquot_initialize(inode);
-	depth = reiserfs_write_lock_once(inode->i_sb);
+	reiserfs_write_lock(inode->i_sb);
 	if (attr->ia_valid & ATTR_SIZE) {
 		/* version 2 items will be caught by the s_maxbytes check
 		 ** done for us in vmtruncate
 		 */
 		if (get_inode_item_key_version(inode) == KEY_FORMAT_3_5 &&
 		    attr->ia_size > MAX_NON_LFS) {
+			reiserfs_write_unlock(inode->i_sb);
 			error = -EFBIG;
 			goto out;
 		}
@@ -3150,8 +3154,10 @@ int reiserfs_setattr(struct dentry *dentry, struct iattr *attr)
 				if (err)
 					error = err;
 			}
-			if (error)
+			if (error) {
+				reiserfs_write_unlock(inode->i_sb);
 				goto out;
+			}
 			/*
 			 * file size is changed, ctime and mtime are
 			 * to be updated
@@ -3159,6 +3165,7 @@ int reiserfs_setattr(struct dentry *dentry, struct iattr *attr)
 			attr->ia_valid |= (ATTR_MTIME | ATTR_CTIME);
 		}
 	}
+	reiserfs_write_unlock(inode->i_sb);
 
 	if ((((attr->ia_valid & ATTR_UID) && (from_kuid(&init_user_ns, attr->ia_uid) & ~0xffff)) ||
 	     ((attr->ia_valid & ATTR_GID) && (from_kgid(&init_user_ns, attr->ia_gid) & ~0xffff))) &&
@@ -3183,14 +3190,16 @@ int reiserfs_setattr(struct dentry *dentry, struct iattr *attr)
 			return error;
 
 		/* (user+group)*(old+new) structure - we count quota info and , inode write (sb, inode) */
+		reiserfs_write_lock(inode->i_sb);
 		error = journal_begin(&th, inode->i_sb, jbegin_count);
+		reiserfs_write_unlock(inode->i_sb);
 		if (error)
 			goto out;
-		reiserfs_write_unlock_once(inode->i_sb, depth);
 		error = dquot_transfer(inode, attr);
-		depth = reiserfs_write_lock_once(inode->i_sb);
+		reiserfs_write_lock(inode->i_sb);
 		if (error) {
 			journal_end(&th, inode->i_sb, jbegin_count);
+			reiserfs_write_unlock(inode->i_sb);
 			goto out;
 		}
 
@@ -3202,17 +3211,11 @@ int reiserfs_setattr(struct dentry *dentry, struct iattr *attr)
 			inode->i_gid = attr->ia_gid;
 		mark_inode_dirty(inode);
 		error = journal_end(&th, inode->i_sb, jbegin_count);
+		reiserfs_write_unlock(inode->i_sb);
 		if (error)
 			goto out;
 	}
 
-	/*
-	 * Relax the lock here, as it might truncate the
-	 * inode pages and wait for inode pages locks.
-	 * To release such page lock, the owner needs the
-	 * reiserfs lock
-	 */
-	reiserfs_write_unlock_once(inode->i_sb, depth);
 	if ((attr->ia_valid & ATTR_SIZE) &&
 	    attr->ia_size != i_size_read(inode)) {
 		error = inode_newsize_ok(inode, attr->ia_size);
@@ -3226,16 +3229,13 @@ int reiserfs_setattr(struct dentry *dentry, struct iattr *attr)
 		setattr_copy(inode, attr);
 		mark_inode_dirty(inode);
 	}
-	depth = reiserfs_write_lock_once(inode->i_sb);
 
 	if (!error && reiserfs_posixacl(inode->i_sb)) {
 		if (attr->ia_valid & ATTR_MODE)
 			error = reiserfs_acl_chmod(inode);
 	}
 
-      out:
-	reiserfs_write_unlock_once(inode->i_sb, depth);
-
+out:
 	return error;
 }
 

fs/reiserfs/ioctl.c

@@ -167,7 +167,6 @@ int reiserfs_commit_write(struct file *f, struct page *page,
 int reiserfs_unpack(struct inode *inode, struct file *filp)
 {
 	int retval = 0;
-	int depth;
 	int index;
 	struct page *page;
 	struct address_space *mapping;
@@ -183,11 +182,11 @@ int reiserfs_unpack(struct inode *inode, struct file *filp)
 		return 0;
 	}
 
-	depth = reiserfs_write_lock_once(inode->i_sb);
-
 	/* we need to make sure nobody is changing the file size beneath us */
 	reiserfs_mutex_lock_safe(&inode->i_mutex, inode->i_sb);
 
+	reiserfs_write_lock(inode->i_sb);
+
 	write_from = inode->i_size & (blocksize - 1);
 	/* if we are on a block boundary, we are already unpacked.  */
 	if (write_from == 0) {
@@ -221,6 +220,6 @@ int reiserfs_unpack(struct inode *inode, struct file *filp)
 
       out:
 	mutex_unlock(&inode->i_mutex);
-	reiserfs_write_unlock_once(inode->i_sb, depth);
+	reiserfs_write_unlock(inode->i_sb);
 	return retval;
 }

fs/reiserfs/journal.c

@@ -947,9 +947,11 @@ static int reiserfs_async_progress_wait(struct super_block *s)
 	struct reiserfs_journal *j = SB_JOURNAL(s);
 
 	if (atomic_read(&j->j_async_throttle)) {
-		reiserfs_write_unlock(s);
+		int depth;
+
+		depth = reiserfs_write_unlock_nested(s);
 		congestion_wait(BLK_RW_ASYNC, HZ / 10);
-		reiserfs_write_lock(s);
+		reiserfs_write_lock_nested(s, depth);
 	}
 
 	return 0;
@@ -972,6 +974,7 @@ static int flush_commit_list(struct super_block *s,
 	struct reiserfs_journal *journal = SB_JOURNAL(s);
 	int retval = 0;
 	int write_len;
+	int depth;
 
 	reiserfs_check_lock_depth(s, "flush_commit_list");
 
@@ -1018,12 +1021,12 @@ static int flush_commit_list(struct super_block *s,
 		 * We might sleep in numerous places inside
 		 * write_ordered_buffers. Relax the write lock.
 		 */
-		reiserfs_write_unlock(s);
+		depth = reiserfs_write_unlock_nested(s);
 		ret = write_ordered_buffers(&journal->j_dirty_buffers_lock,
 					    journal, jl, &jl->j_bh_list);
 		if (ret < 0 && retval == 0)
 			retval = ret;
-		reiserfs_write_lock(s);
+		reiserfs_write_lock_nested(s, depth);
 	}
 	BUG_ON(!list_empty(&jl->j_bh_list));
 	/*
@@ -1043,9 +1046,9 @@ static int flush_commit_list(struct super_block *s,
 		tbh = journal_find_get_block(s, bn);
 		if (tbh) {
 			if (buffer_dirty(tbh)) {
-		            reiserfs_write_unlock(s);
+		            depth = reiserfs_write_unlock_nested(s);
 			    ll_rw_block(WRITE, 1, &tbh);
-			    reiserfs_write_lock(s);
+			    reiserfs_write_lock_nested(s, depth);
 			}
 			put_bh(tbh) ;
 		}
@@ -1057,17 +1060,17 @@ static int flush_commit_list(struct super_block *s,
 		    (jl->j_start + i) % SB_ONDISK_JOURNAL_SIZE(s);
 		tbh = journal_find_get_block(s, bn);
 
-		reiserfs_write_unlock(s);
-		wait_on_buffer(tbh);
-		reiserfs_write_lock(s);
+		depth = reiserfs_write_unlock_nested(s);
+		__wait_on_buffer(tbh);
+		reiserfs_write_lock_nested(s, depth);
 		// since we're using ll_rw_blk above, it might have skipped over
 		// a locked buffer.  Double check here
 		//
 		/* redundant, sync_dirty_buffer() checks */
 		if (buffer_dirty(tbh)) {
-			reiserfs_write_unlock(s);
+			depth = reiserfs_write_unlock_nested(s);
 			sync_dirty_buffer(tbh);
-			reiserfs_write_lock(s);
+			reiserfs_write_lock_nested(s, depth);
 		}
 		if (unlikely(!buffer_uptodate(tbh))) {
 #ifdef CONFIG_REISERFS_CHECK
@@ -1091,12 +1094,12 @@ static int flush_commit_list(struct super_block *s,
 		if (buffer_dirty(jl->j_commit_bh))
 			BUG();
 		mark_buffer_dirty(jl->j_commit_bh) ;
-		reiserfs_write_unlock(s);
+		depth = reiserfs_write_unlock_nested(s);
 		if (reiserfs_barrier_flush(s))
 			__sync_dirty_buffer(jl->j_commit_bh, WRITE_FLUSH_FUA);
 		else
 			sync_dirty_buffer(jl->j_commit_bh);
-		reiserfs_write_lock(s);
+		reiserfs_write_lock_nested(s, depth);
 	}
 
 	/* If there was a write error in the journal - we can't commit this
@@ -1228,15 +1231,16 @@ static int _update_journal_header_block(struct super_block *sb,
 {
 	struct reiserfs_journal_header *jh;
 	struct reiserfs_journal *journal = SB_JOURNAL(sb);
+	int depth;
 
 	if (reiserfs_is_journal_aborted(journal))
 		return -EIO;
 
 	if (trans_id >= journal->j_last_flush_trans_id) {
 		if (buffer_locked((journal->j_header_bh))) {
-			reiserfs_write_unlock(sb);
-			wait_on_buffer((journal->j_header_bh));
-			reiserfs_write_lock(sb);
+			depth = reiserfs_write_unlock_nested(sb);
+			__wait_on_buffer(journal->j_header_bh);
+			reiserfs_write_lock_nested(sb, depth);
 			if (unlikely(!buffer_uptodate(journal->j_header_bh))) {
 #ifdef CONFIG_REISERFS_CHECK
 				reiserfs_warning(sb, "journal-699",
@@ -1254,14 +1258,14 @@ static int _update_journal_header_block(struct super_block *sb,
 		jh->j_mount_id = cpu_to_le32(journal->j_mount_id);
 
 		set_buffer_dirty(journal->j_header_bh);
-		reiserfs_write_unlock(sb);
+		depth = reiserfs_write_unlock_nested(sb);
 
 		if (reiserfs_barrier_flush(sb))
 			__sync_dirty_buffer(journal->j_header_bh, WRITE_FLUSH_FUA);
 		else
 			sync_dirty_buffer(journal->j_header_bh);
 
-		reiserfs_write_lock(sb);
+		reiserfs_write_lock_nested(sb, depth);
 		if (!buffer_uptodate(journal->j_header_bh)) {
 			reiserfs_warning(sb, "journal-837",
 					 "IO error during journal replay");
@@ -1341,6 +1345,7 @@ static int flush_journal_list(struct super_block *s,
 	unsigned long j_len_saved = jl->j_len;
 	struct reiserfs_journal *journal = SB_JOURNAL(s);
 	int err = 0;
+	int depth;
 
 	BUG_ON(j_len_saved <= 0);
 
@@ -1495,9 +1500,9 @@ static int flush_journal_list(struct super_block *s,
 						       "cn->bh is NULL");
 				}
 
-				reiserfs_write_unlock(s);
-				wait_on_buffer(cn->bh);
-				reiserfs_write_lock(s);
+				depth = reiserfs_write_unlock_nested(s);
+				__wait_on_buffer(cn->bh);
+				reiserfs_write_lock_nested(s, depth);
 
 				if (!cn->bh) {
 					reiserfs_panic(s, "journal-1012",
@@ -1974,6 +1979,7 @@ static int journal_compare_desc_commit(struct super_block *sb,
 /* returns 0 if it did not find a description block
 ** returns -1 if it found a corrupt commit block
 ** returns 1 if both desc and commit were valid
+** NOTE: only called during fs mount
 */
 static int journal_transaction_is_valid(struct super_block *sb,
 					struct buffer_head *d_bh,
@@ -2073,8 +2079,9 @@ static void brelse_array(struct buffer_head **heads, int num)
 
 /*
 ** given the start, and values for the oldest acceptable transactions,
-** this either reads in a replays a transaction, or returns because the transaction
-** is invalid, or too old.
+** this either reads in a replays a transaction, or returns because the
+** transaction is invalid, or too old.
+** NOTE: only called during fs mount
 */
 static int journal_read_transaction(struct super_block *sb,
 				    unsigned long cur_dblock,
@@ -2208,10 +2215,7 @@ static int journal_read_transaction(struct super_block *sb,
 	ll_rw_block(READ, get_desc_trans_len(desc), log_blocks);
 	for (i = 0; i < get_desc_trans_len(desc); i++) {
 
-		reiserfs_write_unlock(sb);
 		wait_on_buffer(log_blocks[i]);
-		reiserfs_write_lock(sb);
-
 		if (!buffer_uptodate(log_blocks[i])) {
 			reiserfs_warning(sb, "journal-1212",
 					 "REPLAY FAILURE fsck required! "
@@ -2318,12 +2322,13 @@ static struct buffer_head *reiserfs_breada(struct block_device *dev,
 
 /*
 ** read and replay the log
-** on a clean unmount, the journal header's next unflushed pointer will be to an invalid
-** transaction.  This tests that before finding all the transactions in the log, which makes normal mount times fast.
-**
-** After a crash, this starts with the next unflushed transaction, and replays until it finds one too old, or invalid.
-**
+** on a clean unmount, the journal header's next unflushed pointer will
+** be to an invalid transaction.  This tests that before finding all the
+** transactions in the log, which makes normal mount times fast.
+** After a crash, this starts with the next unflushed transaction, and
+** replays until it finds one too old, or invalid.
 ** On exit, it sets things up so the first transaction will work correctly.
+** NOTE: only called during fs mount
 */
 static int journal_read(struct super_block *sb)
 {
@@ -2501,14 +2506,18 @@ static int journal_read(struct super_block *sb)
 			      "replayed %d transactions in %lu seconds\n",
 			      replay_count, get_seconds() - start);
 	}
+	/* needed to satisfy the locking in _update_journal_header_block */
+	reiserfs_write_lock(sb);
 	if (!bdev_read_only(sb->s_bdev) &&
 	    _update_journal_header_block(sb, journal->j_start,
 					 journal->j_last_flush_trans_id)) {
+		reiserfs_write_unlock(sb);
 		/* replay failed, caller must call free_journal_ram and abort
 		 ** the mount
 		 */
 		return -1;
 	}
+	reiserfs_write_unlock(sb);
 	return 0;
 }
 
@@ -2828,13 +2837,7 @@ int journal_init(struct super_block *sb, const char *j_dev_name,
 		goto free_and_return;
 	}
 
-	/*
-	 * Journal_read needs to be inspected in order to push down
-	 * the lock further inside (or even remove it).
-	 */
-	reiserfs_write_lock(sb);
 	ret = journal_read(sb);
-	reiserfs_write_unlock(sb);
 	if (ret < 0) {
 		reiserfs_warning(sb, "reiserfs-2006",
 				 "Replay Failure, unable to mount");
@@ -2923,9 +2926,9 @@ static void queue_log_writer(struct super_block *s)
 	add_wait_queue(&journal->j_join_wait, &wait);
 	set_current_state(TASK_UNINTERRUPTIBLE);
 	if (test_bit(J_WRITERS_QUEUED, &journal->j_state)) {
-		reiserfs_write_unlock(s);
+		int depth = reiserfs_write_unlock_nested(s);
 		schedule();
-		reiserfs_write_lock(s);
+		reiserfs_write_lock_nested(s, depth);
 	}
 	__set_current_state(TASK_RUNNING);
 	remove_wait_queue(&journal->j_join_wait, &wait);
@@ -2943,9 +2946,12 @@ static void let_transaction_grow(struct super_block *sb, unsigned int trans_id)
 	struct reiserfs_journal *journal = SB_JOURNAL(sb);
 	unsigned long bcount = journal->j_bcount;
 	while (1) {
-		reiserfs_write_unlock(sb);
+		int depth;
+
+		depth = reiserfs_write_unlock_nested(sb);
 		schedule_timeout_uninterruptible(1);
-		reiserfs_write_lock(sb);
+		reiserfs_write_lock_nested(sb, depth);
+
 		journal->j_current_jl->j_state |= LIST_COMMIT_PENDING;
 		while ((atomic_read(&journal->j_wcount) > 0 ||
 			atomic_read(&journal->j_jlock)) &&
@@ -2976,6 +2982,7 @@ static int do_journal_begin_r(struct reiserfs_transaction_handle *th,
 	struct reiserfs_transaction_handle myth;
 	int sched_count = 0;
 	int retval;
+	int depth;
 
 	reiserfs_check_lock_depth(sb, "journal_begin");
 	BUG_ON(nblocks > journal->j_trans_max);
@@ -2996,9 +3003,9 @@ static int do_journal_begin_r(struct reiserfs_transaction_handle *th,
 
 	if (test_bit(J_WRITERS_BLOCKED, &journal->j_state)) {
 		unlock_journal(sb);
-		reiserfs_write_unlock(sb);
+		depth = reiserfs_write_unlock_nested(sb);
 		reiserfs_wait_on_write_block(sb);
-		reiserfs_write_lock(sb);
+		reiserfs_write_lock_nested(sb, depth);
 		PROC_INFO_INC(sb, journal.journal_relock_writers);
 		goto relock;
 	}
@@ -3821,6 +3828,7 @@ void reiserfs_restore_prepared_buffer(struct super_block *sb,
 	if (test_clear_buffer_journal_restore_dirty(bh) &&
 	    buffer_journal_dirty(bh)) {
 		struct reiserfs_journal_cnode *cn;
+		reiserfs_write_lock(sb);
 		cn = get_journal_hash_dev(sb,
 					  journal->j_list_hash_table,
 					  bh->b_blocknr);
@@ -3828,6 +3836,7 @@ void reiserfs_restore_prepared_buffer(struct super_block *sb,
 			set_buffer_journal_test(bh);
 			mark_buffer_dirty(bh);
 		}
+		reiserfs_write_unlock(sb);
 	}
 	clear_buffer_journal_prepared(bh);
 }
@@ -3911,6 +3920,7 @@ static int do_journal_end(struct reiserfs_transaction_handle *th,
 	unsigned long jindex;
 	unsigned int commit_trans_id;
 	int trans_half;
+	int depth;
 
 	BUG_ON(th->t_refcount > 1);
 	BUG_ON(!th->t_trans_id);
@@ -4116,9 +4126,7 @@ static int do_journal_end(struct reiserfs_transaction_handle *th,
 		next = cn->next;
 		free_cnode(sb, cn);
 		cn = next;
-		reiserfs_write_unlock(sb);
-		cond_resched();
-		reiserfs_write_lock(sb);
+		reiserfs_cond_resched(sb);
 	}
 
 	/* we are done  with both the c_bh and d_bh, but
@@ -4165,10 +4173,10 @@ static int do_journal_end(struct reiserfs_transaction_handle *th,
 	 * is lost.
 	 */
 	if (!list_empty(&jl->j_tail_bh_list)) {
-		reiserfs_write_unlock(sb);
+		depth = reiserfs_write_unlock_nested(sb);
 		write_ordered_buffers(&journal->j_dirty_buffers_lock,
 				      journal, jl, &jl->j_tail_bh_list);
-		reiserfs_write_lock(sb);
+		reiserfs_write_lock_nested(sb, depth);
 	}
 	BUG_ON(!list_empty(&jl->j_tail_bh_list));
 	mutex_unlock(&jl->j_commit_mutex);

fs/reiserfs/lock.c

@@ -48,30 +48,35 @@ void reiserfs_write_unlock(struct super_block *s)
 	}
 }
 
-/*
- * If we already own the lock, just exit and don't increase the depth.
- * Useful when we don't want to lock more than once.
- *
- * We always return the lock_depth we had before calling
- * this function.
- */
-int reiserfs_write_lock_once(struct super_block *s)
+int __must_check reiserfs_write_unlock_nested(struct super_block *s)
 {
 	struct reiserfs_sb_info *sb_i = REISERFS_SB(s);
+	int depth;
 
-	if (sb_i->lock_owner != current) {
-		mutex_lock(&sb_i->lock);
-		sb_i->lock_owner = current;
-		return sb_i->lock_depth++;
-	}
+	/* this can happen when the lock isn't always held */
+	if (sb_i->lock_owner != current)
+		return -1;
+
+	depth = sb_i->lock_depth;
+
+	sb_i->lock_depth = -1;
+	sb_i->lock_owner = NULL;
+	mutex_unlock(&sb_i->lock);
 
-	return sb_i->lock_depth;
+	return depth;
 }
 
-void reiserfs_write_unlock_once(struct super_block *s, int lock_depth)
+void reiserfs_write_lock_nested(struct super_block *s, int depth)
 {
-	if (lock_depth == -1)
-		reiserfs_write_unlock(s);
+	struct reiserfs_sb_info *sb_i = REISERFS_SB(s);
+
+	/* this can happen when the lock isn't always held */
+	if (depth == -1)
+		return;
+
+	mutex_lock(&sb_i->lock);
+	sb_i->lock_owner = current;
+	sb_i->lock_depth = depth;
 }
 
 /*
@@ -82,9 +87,7 @@ void reiserfs_check_lock_depth(struct super_block *sb, char *caller)
 {
 	struct reiserfs_sb_info *sb_i = REISERFS_SB(sb);
 
-	if (sb_i->lock_depth < 0)
-		reiserfs_panic(sb, "%s called without kernel lock held %d",
-			       caller);
+	WARN_ON(sb_i->lock_depth < 0);
 }
 
 #ifdef CONFIG_REISERFS_CHECK

fs/reiserfs/namei.c

@@ -325,7 +325,6 @@ static struct dentry *reiserfs_lookup(struct inode *dir, struct dentry *dentry,
 				      unsigned int flags)
 {
 	int retval;
-	int lock_depth;
 	struct inode *inode = NULL;
 	struct reiserfs_dir_entry de;
 	INITIALIZE_PATH(path_to_entry);
@@ -333,12 +332,7 @@ static struct dentry *reiserfs_lookup(struct inode *dir, struct dentry *dentry,
 	if (REISERFS_MAX_NAME(dir->i_sb->s_blocksize) < dentry->d_name.len)
 		return ERR_PTR(-ENAMETOOLONG);
 
-	/*
-	 * Might be called with or without the write lock, must be careful
-	 * to not recursively hold it in case we want to release the lock
-	 * before rescheduling.
-	 */
-	lock_depth = reiserfs_write_lock_once(dir->i_sb);
+	reiserfs_write_lock(dir->i_sb);
 
 	de.de_gen_number_bit_string = NULL;
 	retval =
@@ -349,7 +343,7 @@ static struct dentry *reiserfs_lookup(struct inode *dir, struct dentry *dentry,
 		inode = reiserfs_iget(dir->i_sb,
 				      (struct cpu_key *)&(de.de_dir_id));
 		if (!inode || IS_ERR(inode)) {
-			reiserfs_write_unlock_once(dir->i_sb, lock_depth);
+			reiserfs_write_unlock(dir->i_sb);
 			return ERR_PTR(-EACCES);
 		}
 
@@ -358,7 +352,7 @@ static struct dentry *reiserfs_lookup(struct inode *dir, struct dentry *dentry,
 		if (IS_PRIVATE(dir))
 			inode->i_flags |= S_PRIVATE;
 	}
-	reiserfs_write_unlock_once(dir->i_sb, lock_depth);
+	reiserfs_write_unlock(dir->i_sb);
 	if (retval == IO_ERROR) {
 		return ERR_PTR(-EIO);
 	}
@@ -727,7 +721,6 @@ static int reiserfs_mkdir(struct inode *dir, struct dentry *dentry, umode_t mode
 	struct inode *inode;
 	struct reiserfs_transaction_handle th;
 	struct reiserfs_security_handle security;
-	int lock_depth;
 	/* We need blocks for transaction + (user+group)*(quotas for new inode + update of quota for directory owner) */
 	int jbegin_count =
 	    JOURNAL_PER_BALANCE_CNT * 3 +
@@ -753,7 +746,7 @@ static int reiserfs_mkdir(struct inode *dir, struct dentry *dentry, umode_t mode
 		return retval;
 	}
 	jbegin_count += retval;
-	lock_depth = reiserfs_write_lock_once(dir->i_sb);
+	reiserfs_write_lock(dir->i_sb);
 
 	retval = journal_begin(&th, dir->i_sb, jbegin_count);
 	if (retval) {
@@ -804,7 +797,7 @@ static int reiserfs_mkdir(struct inode *dir, struct dentry *dentry, umode_t mode
 	d_instantiate(dentry, inode);
 	retval = journal_end(&th, dir->i_sb, jbegin_count);
 out_failed:
-	reiserfs_write_unlock_once(dir->i_sb, lock_depth);
+	reiserfs_write_unlock(dir->i_sb);
 	return retval;
 }
 
@@ -920,7 +913,6 @@ static int reiserfs_unlink(struct inode *dir, struct dentry *dentry)
 	struct reiserfs_transaction_handle th;
 	int jbegin_count;
 	unsigned long savelink;
-	int depth;
 
 	dquot_initialize(dir);
 
@@ -934,7 +926,7 @@ static int reiserfs_unlink(struct inode *dir, struct dentry *dentry)
 	    JOURNAL_PER_BALANCE_CNT * 2 + 2 +
 	    4 * REISERFS_QUOTA_TRANS_BLOCKS(dir->i_sb);
 
-	depth = reiserfs_write_lock_once(dir->i_sb);
+	reiserfs_write_lock(dir->i_sb);
 	retval = journal_begin(&th, dir->i_sb, jbegin_count);
 	if (retval)
 		goto out_unlink;
@@ -995,7 +987,7 @@ static int reiserfs_unlink(struct inode *dir, struct dentry *dentry)
 
 	retval = journal_end(&th, dir->i_sb, jbegin_count);
 	reiserfs_check_path(&path);
-	reiserfs_write_unlock_once(dir->i_sb, depth);
+	reiserfs_write_unlock(dir->i_sb);
 	return retval;
 
       end_unlink:
@@ -1005,7 +997,7 @@ static int reiserfs_unlink(struct inode *dir, struct dentry *dentry)
 	if (err)
 		retval = err;
       out_unlink:
-	reiserfs_write_unlock_once(dir->i_sb, depth);
+	reiserfs_write_unlock(dir->i_sb);
 	return retval;
 }
 

fs/reiserfs/prints.c

@@ -358,12 +358,13 @@ void __reiserfs_panic(struct super_block *sb, const char *id,
 	dump_stack();
 #endif
 	if (sb)
-		panic(KERN_WARNING "REISERFS panic (device %s): %s%s%s: %s\n",
+		printk(KERN_WARNING "REISERFS panic (device %s): %s%s%s: %s\n",
 		      sb->s_id, id ? id : "", id ? " " : "",
 		      function, error_buf);
 	else
-		panic(KERN_WARNING "REISERFS panic: %s%s%s: %s\n",
+		printk(KERN_WARNING "REISERFS panic: %s%s%s: %s\n",
 		      id ? id : "", id ? " " : "", function, error_buf);
+	BUG();
 }
 
 void __reiserfs_error(struct super_block *sb, const char *id,

fs/reiserfs/reiserfs.h

@@ -630,8 +630,8 @@ static inline int __reiserfs_is_journal_aborted(struct reiserfs_journal
  */
 void reiserfs_write_lock(struct super_block *s);
 void reiserfs_write_unlock(struct super_block *s);
-int reiserfs_write_lock_once(struct super_block *s);
-void reiserfs_write_unlock_once(struct super_block *s, int lock_depth);
+int __must_check reiserfs_write_unlock_nested(struct super_block *s);
+void reiserfs_write_lock_nested(struct super_block *s, int depth);
 
 #ifdef CONFIG_REISERFS_CHECK
 void reiserfs_lock_check_recursive(struct super_block *s);
@@ -667,31 +667,33 @@ static inline void reiserfs_lock_check_recursive(struct super_block *s) { }
  * - The inode mutex
  */
 static inline void reiserfs_mutex_lock_safe(struct mutex *m,
-			       struct super_block *s)
+					    struct super_block *s)
 {
-	reiserfs_lock_check_recursive(s);
-	reiserfs_write_unlock(s);
+	int depth;
+
+	depth = reiserfs_write_unlock_nested(s);
 	mutex_lock(m);
-	reiserfs_write_lock(s);
+	reiserfs_write_lock_nested(s, depth);
 }
 
 static inline void
 reiserfs_mutex_lock_nested_safe(struct mutex *m, unsigned int subclass,
-			       struct super_block *s)
+				struct super_block *s)
 {
-	reiserfs_lock_check_recursive(s);
-	reiserfs_write_unlock(s);
+	int depth;
+
+	depth = reiserfs_write_unlock_nested(s);
 	mutex_lock_nested(m, subclass);
-	reiserfs_write_lock(s);
+	reiserfs_write_lock_nested(s, depth);
 }
 
 static inline void
 reiserfs_down_read_safe(struct rw_semaphore *sem, struct super_block *s)
 {
-	reiserfs_lock_check_recursive(s);
-	reiserfs_write_unlock(s);
-	down_read(sem);
-	reiserfs_write_lock(s);
+       int depth;
+       depth = reiserfs_write_unlock_nested(s);
+       down_read(sem);
+       reiserfs_write_lock_nested(s, depth);
 }
 
 /*
@@ -701,9 +703,11 @@ reiserfs_down_read_safe(struct rw_semaphore *sem, struct super_block *s)
 static inline void reiserfs_cond_resched(struct super_block *s)
 {
 	if (need_resched()) {
-		reiserfs_write_unlock(s);
+		int depth;
+
+		depth = reiserfs_write_unlock_nested(s);
 		schedule();
-		reiserfs_write_lock(s);
+		reiserfs_write_lock_nested(s, depth);
 	}
 }
 

fs/reiserfs/resize.c

@@ -34,6 +34,7 @@ int reiserfs_resize(struct super_block *s, unsigned long block_count_new)
 	unsigned long int block_count, free_blocks;
 	int i;
 	int copy_size;
+	int depth;
 
 	sb = SB_DISK_SUPER_BLOCK(s);
 
@@ -43,7 +44,9 @@ int reiserfs_resize(struct super_block *s, unsigned long block_count_new)
 	}
 
 	/* check the device size */
+	depth = reiserfs_write_unlock_nested(s);
 	bh = sb_bread(s, block_count_new - 1);
+	reiserfs_write_lock_nested(s, depth);
 	if (!bh) {
 		printk("reiserfs_resize: can\'t read last block\n");
 		return -EINVAL;
@@ -125,9 +128,12 @@ int reiserfs_resize(struct super_block *s, unsigned long block_count_new)
 		 * transaction begins, and the new bitmaps don't matter if the
 		 * transaction fails. */
 		for (i = bmap_nr; i < bmap_nr_new; i++) {
+			int depth;
 			/* don't use read_bitmap_block since it will cache
 			 * the uninitialized bitmap */
+			depth = reiserfs_write_unlock_nested(s);
 			bh = sb_bread(s, i * s->s_blocksize * 8);
+			reiserfs_write_lock_nested(s, depth);
 			if (!bh) {
 				vfree(bitmap);
 				return -EIO;
@@ -138,9 +144,9 @@ int reiserfs_resize(struct super_block *s, unsigned long block_count_new)
 
 			set_buffer_uptodate(bh);
 			mark_buffer_dirty(bh);
-			reiserfs_write_unlock(s);
+			depth = reiserfs_write_unlock_nested(s);
 			sync_dirty_buffer(bh);
-			reiserfs_write_lock(s);
+			reiserfs_write_lock_nested(s, depth);
 			// update bitmap_info stuff
 			bitmap[i].free_count = sb_blocksize(sb) * 8 - 1;
 			brelse(bh);

fs/reiserfs/stree.c

@@ -524,14 +524,14 @@ static int is_tree_node(struct buffer_head *bh, int level)
  * the caller (search_by_key) will perform other schedule-unsafe
  * operations just after calling this function.
  *
- * @return true if we have unlocked
+ * @return depth of lock to be restored after read completes
  */
-static bool search_by_key_reada(struct super_block *s,
+static int search_by_key_reada(struct super_block *s,
 				struct buffer_head **bh,
 				b_blocknr_t *b, int num)
 {
 	int i, j;
-	bool unlocked = false;
+	int depth = -1;
 
 	for (i = 0; i < num; i++) {
 		bh[i] = sb_getblk(s, b[i]);
@@ -549,15 +549,13 @@ static bool search_by_key_reada(struct super_block *s,
 		 * you have to make sure the prepared bit isn't set on this buffer
 		 */
 		if (!buffer_uptodate(bh[j])) {
-			if (!unlocked) {
-				reiserfs_write_unlock(s);
-				unlocked = true;
-			}
+			if (depth == -1)
+				depth = reiserfs_write_unlock_nested(s);
 			ll_rw_block(READA, 1, bh + j);
 		}
 		brelse(bh[j]);
 	}
-	return unlocked;
+	return depth;
 }
 
 /**************************************************************************
@@ -645,26 +643,26 @@ int search_by_key(struct super_block *sb, const struct cpu_key *key,	/* Key to s
 		   have a pointer to it. */
 		if ((bh = last_element->pe_buffer =
 		     sb_getblk(sb, block_number))) {
-			bool unlocked = false;
 
-			if (!buffer_uptodate(bh) && reada_count > 1)
-				/* may unlock the write lock */
-				unlocked = search_by_key_reada(sb, reada_bh,
-						    reada_blocks, reada_count);
 			/*
-			 * If we haven't already unlocked the write lock,
-			 * then we need to do that here before reading
-			 * the current block
+			 * We'll need to drop the lock if we encounter any
+			 * buffers that need to be read. If all of them are
+			 * already up to date, we don't need to drop the lock.
 			 */
-			if (!buffer_uptodate(bh) && !unlocked) {
-				reiserfs_write_unlock(sb);
-				unlocked = true;
-			}
+			int depth = -1;
+
+			if (!buffer_uptodate(bh) && reada_count > 1)
+				depth = search_by_key_reada(sb, reada_bh,
+						    reada_blocks, reada_count);
+
+			if (!buffer_uptodate(bh) && depth == -1)
+				depth = reiserfs_write_unlock_nested(sb);
+
 			ll_rw_block(READ, 1, &bh);
 			wait_on_buffer(bh);
 
-			if (unlocked)
-				reiserfs_write_lock(sb);
+			if (depth != -1)
+				reiserfs_write_lock_nested(sb, depth);
 			if (!buffer_uptodate(bh))
 				goto io_error;
 		} else {
@@ -1059,9 +1057,7 @@ static char prepare_for_delete_or_cut(struct reiserfs_transaction_handle *th, st
 			reiserfs_free_block(th, inode, block, 1);
 		    }
 
-		    reiserfs_write_unlock(sb);
-		    cond_resched();
-		    reiserfs_write_lock(sb);
+		    reiserfs_cond_resched(sb);
 
 		    if (item_moved (&s_ih, path))  {
 			need_re_search = 1;
@@ -1190,6 +1186,7 @@ int reiserfs_delete_item(struct reiserfs_transaction_handle *th,
 	struct item_head *q_ih;
 	int quota_cut_bytes;
 	int ret_value, del_size, removed;
+	int depth;
 
 #ifdef CONFIG_REISERFS_CHECK
 	char mode;
@@ -1299,7 +1296,9 @@ int reiserfs_delete_item(struct reiserfs_transaction_handle *th,
 		       "reiserquota delete_item(): freeing %u, id=%u type=%c",
 		       quota_cut_bytes, inode->i_uid, head2type(&s_ih));
 #endif
+	depth = reiserfs_write_unlock_nested(inode->i_sb);
 	dquot_free_space_nodirty(inode, quota_cut_bytes);
+	reiserfs_write_lock_nested(inode->i_sb, depth);
 
 	/* Return deleted body length */
 	return ret_value;
@@ -1325,6 +1324,7 @@ int reiserfs_delete_item(struct reiserfs_transaction_handle *th,
 void reiserfs_delete_solid_item(struct reiserfs_transaction_handle *th,
 				struct inode *inode, struct reiserfs_key *key)
 {
+	struct super_block *sb = th->t_super;
 	struct tree_balance tb;
 	INITIALIZE_PATH(path);
 	int item_len = 0;
@@ -1377,14 +1377,17 @@ void reiserfs_delete_solid_item(struct reiserfs_transaction_handle *th,
 		if (retval == CARRY_ON) {
 			do_balance(&tb, NULL, NULL, M_DELETE);
 			if (inode) {	/* Should we count quota for item? (we don't count quotas for save-links) */
+				int depth;
 #ifdef REISERQUOTA_DEBUG
 				reiserfs_debug(th->t_super, REISERFS_DEBUG_CODE,
 					       "reiserquota delete_solid_item(): freeing %u id=%u type=%c",
 					       quota_cut_bytes, inode->i_uid,
 					       key2type(key));
 #endif
+				depth = reiserfs_write_unlock_nested(sb);
 				dquot_free_space_nodirty(inode,
 							 quota_cut_bytes);
+				reiserfs_write_lock_nested(sb, depth);
 			}
 			break;
 		}
@@ -1561,6 +1564,7 @@ int reiserfs_cut_from_item(struct reiserfs_transaction_handle *th,
 	int retval2 = -1;
 	int quota_cut_bytes;
 	loff_t tail_pos = 0;
+	int depth;
 
 	BUG_ON(!th->t_trans_id);
 
@@ -1733,7 +1737,9 @@ int reiserfs_cut_from_item(struct reiserfs_transaction_handle *th,
 		       "reiserquota cut_from_item(): freeing %u id=%u type=%c",
 		       quota_cut_bytes, inode->i_uid, '?');
 #endif
+	depth = reiserfs_write_unlock_nested(sb);
 	dquot_free_space_nodirty(inode, quota_cut_bytes);
+	reiserfs_write_lock_nested(sb, depth);
 	return ret_value;
 }
 
@@ -1953,9 +1959,11 @@ int reiserfs_paste_into_item(struct reiserfs_transaction_handle *th, struct tree
 			     const char *body,	/* Pointer to the bytes to paste.    */
 			     int pasted_size)
 {				/* Size of pasted bytes.             */
+	struct super_block *sb = inode->i_sb;
 	struct tree_balance s_paste_balance;
 	int retval;
 	int fs_gen;
+	int depth;
 
 	BUG_ON(!th->t_trans_id);
 
@@ -1968,9 +1976,9 @@ int reiserfs_paste_into_item(struct reiserfs_transaction_handle *th, struct tree
 		       key2type(&(key->on_disk_key)));
 #endif
 
-	reiserfs_write_unlock(inode->i_sb);
+	depth = reiserfs_write_unlock_nested(sb);
 	retval = dquot_alloc_space_nodirty(inode, pasted_size);
-	reiserfs_write_lock(inode->i_sb);
+	reiserfs_write_lock_nested(sb, depth);
 	if (retval) {
 		pathrelse(search_path);
 		return retval;
@@ -2027,7 +2035,9 @@ int reiserfs_paste_into_item(struct reiserfs_transaction_handle *th, struct tree
 		       pasted_size, inode->i_uid,
 		       key2type(&(key->on_disk_key)));
 #endif
+	depth = reiserfs_write_unlock_nested(sb);
 	dquot_free_space_nodirty(inode, pasted_size);
+	reiserfs_write_lock_nested(sb, depth);
 	return retval;
 }
 
@@ -2050,6 +2060,7 @@ int reiserfs_insert_item(struct reiserfs_transaction_handle *th,
 	BUG_ON(!th->t_trans_id);
 
 	if (inode) {		/* Do we count quotas for item? */
+		int depth;
 		fs_gen = get_generation(inode->i_sb);
 		quota_bytes = ih_item_len(ih);
 
@@ -2063,11 +2074,11 @@ int reiserfs_insert_item(struct reiserfs_transaction_handle *th,
 			       "reiserquota insert_item(): allocating %u id=%u type=%c",
 			       quota_bytes, inode->i_uid, head2type(ih));
 #endif
-		reiserfs_write_unlock(inode->i_sb);
 		/* We can't dirty inode here. It would be immediately written but
 		 * appropriate stat item isn't inserted yet... */
+		depth = reiserfs_write_unlock_nested(inode->i_sb);
 		retval = dquot_alloc_space_nodirty(inode, quota_bytes);
-		reiserfs_write_lock(inode->i_sb);
+		reiserfs_write_lock_nested(inode->i_sb, depth);
 		if (retval) {
 			pathrelse(path);
 			return retval;
@@ -2118,7 +2129,10 @@ int reiserfs_insert_item(struct reiserfs_transaction_handle *th,
 		       "reiserquota insert_item(): freeing %u id=%u type=%c",
 		       quota_bytes, inode->i_uid, head2type(ih));
 #endif
-	if (inode)
+	if (inode) {
+		int depth = reiserfs_write_unlock_nested(inode->i_sb);
 		dquot_free_space_nodirty(inode, quota_bytes);
+		reiserfs_write_lock_nested(inode->i_sb, depth);
+	}
 	return retval;
 }

fs/reiserfs/super.c

@@ -243,6 +243,7 @@ static int finish_unfinished(struct super_block *s)
 	done = 0;
 	REISERFS_SB(s)->s_is_unlinked_ok = 1;
 	while (!retval) {
+		int depth;
 		retval = search_item(s, &max_cpu_key, &path);
 		if (retval != ITEM_NOT_FOUND) {
 			reiserfs_error(s, "vs-2140",
@@ -298,9 +299,9 @@ static int finish_unfinished(struct super_block *s)
 			retval = remove_save_link_only(s, &save_link_key, 0);
 			continue;
 		}
-		reiserfs_write_unlock(s);
+		depth = reiserfs_write_unlock_nested(inode->i_sb);
 		dquot_initialize(inode);
-		reiserfs_write_lock(s);
+		reiserfs_write_lock_nested(inode->i_sb, depth);
 
 		if (truncate && S_ISDIR(inode->i_mode)) {
 			/* We got a truncate request for a dir which is impossible.
@@ -356,10 +357,12 @@ static int finish_unfinished(struct super_block *s)
 
 #ifdef CONFIG_QUOTA
 	/* Turn quotas off */
+	reiserfs_write_unlock(s);
 	for (i = 0; i < MAXQUOTAS; i++) {
 		if (sb_dqopt(s)->files[i] && quota_enabled[i])
 			dquot_quota_off(s, i);
 	}
+	reiserfs_write_lock(s);
 	if (ms_active_set)
 		/* Restore the flag back */
 		s->s_flags &= ~MS_ACTIVE;
@@ -623,7 +626,6 @@ static void reiserfs_dirty_inode(struct inode *inode, int flags)
 	struct reiserfs_transaction_handle th;
 
 	int err = 0;
-	int lock_depth;
 
 	if (inode->i_sb->s_flags & MS_RDONLY) {
 		reiserfs_warning(inode->i_sb, "clm-6006",
@@ -631,7 +633,7 @@ static void reiserfs_dirty_inode(struct inode *inode, int flags)
 				 inode->i_ino);
 		return;
 	}
-	lock_depth = reiserfs_write_lock_once(inode->i_sb);
+	reiserfs_write_lock(inode->i_sb);
 
 	/* this is really only used for atime updates, so they don't have
 	 ** to be included in O_SYNC or fsync
@@ -644,7 +646,7 @@ static void reiserfs_dirty_inode(struct inode *inode, int flags)
 	journal_end(&th, inode->i_sb, 1);
 
 out:
-	reiserfs_write_unlock_once(inode->i_sb, lock_depth);
+	reiserfs_write_unlock(inode->i_sb);
 }
 
 static int reiserfs_show_options(struct seq_file *seq, struct dentry *root)
@@ -1334,7 +1336,7 @@ static int reiserfs_remount(struct super_block *s, int *mount_flags, char *arg)
 				kfree(qf_names[i]);
 #endif
 		err = -EINVAL;
-		goto out_unlock;
+		goto out_err_unlock;
 	}
 #ifdef CONFIG_QUOTA
 	handle_quota_files(s, qf_names, &qfmt);
@@ -1378,35 +1380,32 @@ static int reiserfs_remount(struct super_block *s, int *mount_flags, char *arg)
 	if (blocks) {
 		err = reiserfs_resize(s, blocks);
 		if (err != 0)
-			goto out_unlock;
+			goto out_err_unlock;
 	}
 
 	if (*mount_flags & MS_RDONLY) {
+		reiserfs_write_unlock(s);
 		reiserfs_xattr_init(s, *mount_flags);
 		/* remount read-only */
 		if (s->s_flags & MS_RDONLY)
 			/* it is read-only already */
-			goto out_ok;
+			goto out_ok_unlocked;
 
-		/*
-		 * Drop write lock. Quota will retake it when needed and lock
-		 * ordering requires calling dquot_suspend() without it.
-		 */
-		reiserfs_write_unlock(s);
 		err = dquot_suspend(s, -1);
 		if (err < 0)
 			goto out_err;
-		reiserfs_write_lock(s);
 
 		/* try to remount file system with read-only permissions */
 		if (sb_umount_state(rs) == REISERFS_VALID_FS
 		    || REISERFS_SB(s)->s_mount_state != REISERFS_VALID_FS) {
-			goto out_ok;
+			goto out_ok_unlocked;
 		}
 
+		reiserfs_write_lock(s);
+
 		err = journal_begin(&th, s, 10);
 		if (err)
-			goto out_unlock;
+			goto out_err_unlock;
 
 		/* Mounting a rw partition read-only. */
 		reiserfs_prepare_for_journal(s, SB_BUFFER_WITH_SB(s), 1);
@@ -1415,13 +1414,14 @@ static int reiserfs_remount(struct super_block *s, int *mount_flags, char *arg)
 	} else {
 		/* remount read-write */
 		if (!(s->s_flags & MS_RDONLY)) {
+			reiserfs_write_unlock(s);
 			reiserfs_xattr_init(s, *mount_flags);
-			goto out_ok;	/* We are read-write already */
+			goto out_ok_unlocked;	/* We are read-write already */
 		}
 
 		if (reiserfs_is_journal_aborted(journal)) {
 			err = journal->j_errno;
-			goto out_unlock;
+			goto out_err_unlock;
 		}
 
 		handle_data_mode(s, mount_options);
@@ -1430,7 +1430,7 @@ static int reiserfs_remount(struct super_block *s, int *mount_flags, char *arg)
 		s->s_flags &= ~MS_RDONLY;	/* now it is safe to call journal_begin */
 		err = journal_begin(&th, s, 10);
 		if (err)
-			goto out_unlock;
+			goto out_err_unlock;
 
 		/* Mount a partition which is read-only, read-write */
 		reiserfs_prepare_for_journal(s, SB_BUFFER_WITH_SB(s), 1);
@@ -1447,26 +1447,22 @@ static int reiserfs_remount(struct super_block *s, int *mount_flags, char *arg)
 	SB_JOURNAL(s)->j_must_wait = 1;
 	err = journal_end(&th, s, 10);
 	if (err)
-		goto out_unlock;
+		goto out_err_unlock;
 
+	reiserfs_write_unlock(s);
 	if (!(*mount_flags & MS_RDONLY)) {
-		/*
-		 * Drop write lock. Quota will retake it when needed and lock
-		 * ordering requires calling dquot_resume() without it.
-		 */
-		reiserfs_write_unlock(s);
 		dquot_resume(s, -1);
 		reiserfs_write_lock(s);
 		finish_unfinished(s);
+		reiserfs_write_unlock(s);
 		reiserfs_xattr_init(s, *mount_flags);
 	}
 
-out_ok:
+out_ok_unlocked:
 	replace_mount_options(s, new_opts);
-	reiserfs_write_unlock(s);
 	return 0;
 
-out_unlock:
+out_err_unlock:
 	reiserfs_write_unlock(s);
 out_err:
 	kfree(new_opts);
@@ -2013,12 +2009,14 @@ static int reiserfs_fill_super(struct super_block *s, void *data, int silent)
 			goto error;
 		}
 
+		reiserfs_write_unlock(s);
 		if ((errval = reiserfs_lookup_privroot(s)) ||
 		    (errval = reiserfs_xattr_init(s, s->s_flags))) {
 			dput(s->s_root);
 			s->s_root = NULL;
-			goto error;
+			goto error_unlocked;
 		}
+		reiserfs_write_lock(s);
 
 		/* look for files which were to be removed in previous session */
 		finish_unfinished(s);
@@ -2027,12 +2025,14 @@ static int reiserfs_fill_super(struct super_block *s, void *data, int silent)
 			reiserfs_info(s, "using 3.5.x disk format\n");
 		}
 
+		reiserfs_write_unlock(s);
 		if ((errval = reiserfs_lookup_privroot(s)) ||
 		    (errval = reiserfs_xattr_init(s, s->s_flags))) {
 			dput(s->s_root);
 			s->s_root = NULL;
-			goto error;
+			goto error_unlocked;
 		}
+		reiserfs_write_lock(s);
 	}
 	// mark hash in super block: it could be unset. overwrite should be ok
 	set_sb_hash_function_code(rs, function2code(sbi->s_hash_function));
@@ -2100,6 +2100,7 @@ static int reiserfs_write_dquot(struct dquot *dquot)
 {
 	struct reiserfs_transaction_handle th;
 	int ret, err;
+	int depth;
 
 	reiserfs_write_lock(dquot->dq_sb);
 	ret =
@@ -2107,9 +2108,9 @@ static int reiserfs_write_dquot(struct dquot *dquot)
 			  REISERFS_QUOTA_TRANS_BLOCKS(dquot->dq_sb));
 	if (ret)
 		goto out;
-	reiserfs_write_unlock(dquot->dq_sb);
+	depth = reiserfs_write_unlock_nested(dquot->dq_sb);
 	ret = dquot_commit(dquot);
-	reiserfs_write_lock(dquot->dq_sb);
+	reiserfs_write_lock_nested(dquot->dq_sb, depth);
 	err =
 	    journal_end(&th, dquot->dq_sb,
 			REISERFS_QUOTA_TRANS_BLOCKS(dquot->dq_sb));
@@ -2124,6 +2125,7 @@ static int reiserfs_acquire_dquot(struct dquot *dquot)
 {
 	struct reiserfs_transaction_handle th;
 	int ret, err;
+	int depth;
 
 	reiserfs_write_lock(dquot->dq_sb);
 	ret =
@@ -2131,9 +2133,9 @@ static int reiserfs_acquire_dquot(struct dquot *dquot)
 			  REISERFS_QUOTA_INIT_BLOCKS(dquot->dq_sb));
 	if (ret)
 		goto out;
-	reiserfs_write_unlock(dquot->dq_sb);
+	depth = reiserfs_write_unlock_nested(dquot->dq_sb);
 	ret = dquot_acquire(dquot);
-	reiserfs_write_lock(dquot->dq_sb);
+	reiserfs_write_lock_nested(dquot->dq_sb, depth);
 	err =
 	    journal_end(&th, dquot->dq_sb,
 			REISERFS_QUOTA_INIT_BLOCKS(dquot->dq_sb));
@@ -2186,15 +2188,16 @@ static int reiserfs_write_info(struct super_block *sb, int type)
 {
 	struct reiserfs_transaction_handle th;
 	int ret, err;
+	int depth;
 
 	/* Data block + inode block */
 	reiserfs_write_lock(sb);
 	ret = journal_begin(&th, sb, 2);
 	if (ret)
 		goto out;
-	reiserfs_write_unlock(sb);
+	depth = reiserfs_write_unlock_nested(sb);
 	ret = dquot_commit_info(sb, type);
-	reiserfs_write_lock(sb);
+	reiserfs_write_lock_nested(sb, depth);
 	err = journal_end(&th, sb, 2);
 	if (!ret && err)
 		ret = err;

fs/reiserfs/xattr.c

@@ -81,8 +81,7 @@ static int xattr_unlink(struct inode *dir, struct dentry *dentry)
 	int error;
 	BUG_ON(!mutex_is_locked(&dir->i_mutex));
 
-	reiserfs_mutex_lock_nested_safe(&dentry->d_inode->i_mutex,
-					I_MUTEX_CHILD, dir->i_sb);
+	mutex_lock_nested(&dentry->d_inode->i_mutex, I_MUTEX_CHILD);
 	error = dir->i_op->unlink(dir, dentry);
 	mutex_unlock(&dentry->d_inode->i_mutex);
 
@@ -96,8 +95,7 @@ static int xattr_rmdir(struct inode *dir, struct dentry *dentry)
 	int error;
 	BUG_ON(!mutex_is_locked(&dir->i_mutex));
 
-	reiserfs_mutex_lock_nested_safe(&dentry->d_inode->i_mutex,
-					I_MUTEX_CHILD, dir->i_sb);
+	mutex_lock_nested(&dentry->d_inode->i_mutex, I_MUTEX_CHILD);
 	error = dir->i_op->rmdir(dir, dentry);
 	if (!error)
 		dentry->d_inode->i_flags |= S_DEAD;
@@ -232,22 +230,17 @@ static int reiserfs_for_each_xattr(struct inode *inode,
 	if (IS_PRIVATE(inode) || get_inode_sd_version(inode) == STAT_DATA_V1)
 		return 0;
 
-	reiserfs_write_unlock(inode->i_sb);
 	dir = open_xa_dir(inode, XATTR_REPLACE);
 	if (IS_ERR(dir)) {
 		err = PTR_ERR(dir);
-		reiserfs_write_lock(inode->i_sb);
 		goto out;
 	} else if (!dir->d_inode) {
 		err = 0;
-		reiserfs_write_lock(inode->i_sb);
 		goto out_dir;
 	}
 
 	mutex_lock_nested(&dir->d_inode->i_mutex, I_MUTEX_XATTR);
 
-	reiserfs_write_lock(inode->i_sb);
-
 	buf.xadir = dir;
 	while (1) {
 		err = reiserfs_readdir_inode(dir->d_inode, &buf.ctx);
@@ -281,14 +274,17 @@ static int reiserfs_for_each_xattr(struct inode *inode,
 		int blocks = JOURNAL_PER_BALANCE_CNT * 2 + 2 +
 			     4 * REISERFS_QUOTA_TRANS_BLOCKS(inode->i_sb);
 		struct reiserfs_transaction_handle th;
+		reiserfs_write_lock(inode->i_sb);
 		err = journal_begin(&th, inode->i_sb, blocks);
+		reiserfs_write_unlock(inode->i_sb);
 		if (!err) {
 			int jerror;
-			reiserfs_mutex_lock_nested_safe(
-					  &dir->d_parent->d_inode->i_mutex,
-					  I_MUTEX_XATTR, inode->i_sb);
+			mutex_lock_nested(&dir->d_parent->d_inode->i_mutex,
+					  I_MUTEX_XATTR);
 			err = action(dir, data);
+			reiserfs_write_lock(inode->i_sb);
 			jerror = journal_end(&th, inode->i_sb, blocks);
+			reiserfs_write_unlock(inode->i_sb);
 			mutex_unlock(&dir->d_parent->d_inode->i_mutex);
 			err = jerror ?: err;
 		}
@@ -455,9 +451,7 @@ static int lookup_and_delete_xattr(struct inode *inode, const char *name)
 	}
 
 	if (dentry->d_inode) {
-		reiserfs_write_lock(inode->i_sb);
 		err = xattr_unlink(xadir->d_inode, dentry);
-		reiserfs_write_unlock(inode->i_sb);
 		update_ctime(inode);
 	}
 
@@ -491,24 +485,17 @@ reiserfs_xattr_set_handle(struct reiserfs_transaction_handle *th,
 	if (get_inode_sd_version(inode) == STAT_DATA_V1)
 		return -EOPNOTSUPP;
 
-	reiserfs_write_unlock(inode->i_sb);
-
 	if (!buffer) {
 		err = lookup_and_delete_xattr(inode, name);
-		reiserfs_write_lock(inode->i_sb);
 		return err;
 	}
 
 	dentry = xattr_lookup(inode, name, flags);
-	if (IS_ERR(dentry)) {
-		reiserfs_write_lock(inode->i_sb);
+	if (IS_ERR(dentry))
 		return PTR_ERR(dentry);
-	}
 
 	down_write(&REISERFS_I(inode)->i_xattr_sem);
 
-	reiserfs_write_lock(inode->i_sb);
-
 	xahash = xattr_hash(buffer, buffer_size);
 	while (buffer_pos < buffer_size || buffer_pos == 0) {
 		size_t chunk;
@@ -538,6 +525,7 @@ reiserfs_xattr_set_handle(struct reiserfs_transaction_handle *th,
 			rxh->h_hash = cpu_to_le32(xahash);
 		}
 
+		reiserfs_write_lock(inode->i_sb);
 		err = __reiserfs_write_begin(page, page_offset, chunk + skip);
 		if (!err) {
 			if (buffer)
@@ -546,6 +534,7 @@ reiserfs_xattr_set_handle(struct reiserfs_transaction_handle *th,
 						    page_offset + chunk +
 						    skip);
 		}
+		reiserfs_write_unlock(inode->i_sb);
 		unlock_page(page);
 		reiserfs_put_page(page);
 		buffer_pos += chunk;
@@ -563,10 +552,8 @@ reiserfs_xattr_set_handle(struct reiserfs_transaction_handle *th,
 			.ia_valid = ATTR_SIZE | ATTR_CTIME,
 		};
 
-		reiserfs_write_unlock(inode->i_sb);
 		mutex_lock_nested(&dentry->d_inode->i_mutex, I_MUTEX_XATTR);
 		inode_dio_wait(dentry->d_inode);
-		reiserfs_write_lock(inode->i_sb);
 
 		err = reiserfs_setattr(dentry, &newattrs);
 		mutex_unlock(&dentry->d_inode->i_mutex);
@@ -592,18 +579,19 @@ int reiserfs_xattr_set(struct inode *inode, const char *name,
 
 	reiserfs_write_lock(inode->i_sb);
 	error = journal_begin(&th, inode->i_sb, jbegin_count);
+	reiserfs_write_unlock(inode->i_sb);
 	if (error) {
-		reiserfs_write_unlock(inode->i_sb);
 		return error;
 	}
 
 	error = reiserfs_xattr_set_handle(&th, inode, name,
 					  buffer, buffer_size, flags);
 
+	reiserfs_write_lock(inode->i_sb);
 	error2 = journal_end(&th, inode->i_sb, jbegin_count);
+	reiserfs_write_unlock(inode->i_sb);
 	if (error == 0)
 		error = error2;
-	reiserfs_write_unlock(inode->i_sb);
 
 	return error;
 }
@@ -968,7 +956,7 @@ int reiserfs_lookup_privroot(struct super_block *s)
 	int err = 0;
 
 	/* If we don't have the privroot located yet - go find it */
-	reiserfs_mutex_lock_safe(&s->s_root->d_inode->i_mutex, s);
+	mutex_lock(&s->s_root->d_inode->i_mutex);
 	dentry = lookup_one_len(PRIVROOT_NAME, s->s_root,
 				strlen(PRIVROOT_NAME));
 	if (!IS_ERR(dentry)) {
@@ -996,14 +984,14 @@ int reiserfs_xattr_init(struct super_block *s, int mount_flags)
 		goto error;
 
 	if (!privroot->d_inode && !(mount_flags & MS_RDONLY)) {
-		reiserfs_mutex_lock_safe(&s->s_root->d_inode->i_mutex, s);
+		mutex_lock(&s->s_root->d_inode->i_mutex);
 		err = create_privroot(REISERFS_SB(s)->priv_root);
 		mutex_unlock(&s->s_root->d_inode->i_mutex);
 	}
 
 	if (privroot->d_inode) {
 		s->s_xattr = reiserfs_xattr_handlers;
-		reiserfs_mutex_lock_safe(&privroot->d_inode->i_mutex, s);
+		mutex_lock(&privroot->d_inode->i_mutex);
 		if (!REISERFS_SB(s)->xattr_root) {
 			struct dentry *dentry;
 			dentry = lookup_one_len(XAROOT_NAME, privroot,

fs/reiserfs/xattr_acl.c

@@ -49,13 +49,15 @@ posix_acl_set(struct dentry *dentry, const char *name, const void *value,
 
 	reiserfs_write_lock(inode->i_sb);
 	error = journal_begin(&th, inode->i_sb, jcreate_blocks);
+	reiserfs_write_unlock(inode->i_sb);
 	if (error == 0) {
 		error = reiserfs_set_acl(&th, inode, type, acl);
+		reiserfs_write_lock(inode->i_sb);
 		error2 = journal_end(&th, inode->i_sb, jcreate_blocks);
+		reiserfs_write_unlock(inode->i_sb);
 		if (error2)
 			error = error2;
 	}
-	reiserfs_write_unlock(inode->i_sb);
 
       release_and_out:
 	posix_acl_release(acl);
@@ -435,12 +437,14 @@ int reiserfs_cache_default_acl(struct inode *inode)
 	return nblocks;
 }
 
+/*
+ * Called under i_mutex
+ */
 int reiserfs_acl_chmod(struct inode *inode)
 {
 	struct reiserfs_transaction_handle th;
 	struct posix_acl *acl;
 	size_t size;
-	int depth;
 	int error;
 
 	if (IS_PRIVATE(inode))
@@ -454,9 +458,7 @@ int reiserfs_acl_chmod(struct inode *inode)
 		return 0;
 	}
 
-	reiserfs_write_unlock(inode->i_sb);
 	acl = reiserfs_get_acl(inode, ACL_TYPE_ACCESS);
-	reiserfs_write_lock(inode->i_sb);
 	if (!acl)
 		return 0;
 	if (IS_ERR(acl))
@@ -466,16 +468,18 @@ int reiserfs_acl_chmod(struct inode *inode)
 		return error;
 
 	size = reiserfs_xattr_nblocks(inode, reiserfs_acl_size(acl->a_count));
-	depth = reiserfs_write_lock_once(inode->i_sb);
+	reiserfs_write_lock(inode->i_sb);
 	error = journal_begin(&th, inode->i_sb, size * 2);
+	reiserfs_write_unlock(inode->i_sb);
 	if (!error) {
 		int error2;
 		error = reiserfs_set_acl(&th, inode, ACL_TYPE_ACCESS, acl);
+		reiserfs_write_lock(inode->i_sb);
 		error2 = journal_end(&th, inode->i_sb, size * 2);
+		reiserfs_write_unlock(inode->i_sb);
 		if (error2)
 			error = error2;
 	}
-	reiserfs_write_unlock_once(inode->i_sb, depth);
 	posix_acl_release(acl);
 	return error;
 }

include/linux/jbd.h

@@ -57,16 +57,13 @@
 #define JBD_EXPENSIVE_CHECKING
 extern u8 journal_enable_debug;
 
-#define jbd_debug(n, f, a...)						\
-	do {								\
-		if ((n) <= journal_enable_debug) {			\
-			printk (KERN_DEBUG "(%s, %d): %s: ",		\
-				__FILE__, __LINE__, __func__);	\
-			printk (f, ## a);				\
-		}							\
-	} while (0)
+void __jbd_debug(int level, const char *file, const char *func,
+		 unsigned int line, const char *fmt, ...);
+
+#define jbd_debug(n, fmt, a...) \
+	__jbd_debug((n), __FILE__, __func__, __LINE__, (fmt), ##a)
 #else
-#define jbd_debug(f, a...)	/**/
+#define jbd_debug(n, fmt, a...)    /**/
 #endif
 
 static inline void *jbd_alloc(size_t size, gfp_t flags)
@@ -77,7 +74,7 @@ static inline void *jbd_alloc(size_t size, gfp_t flags)
 static inline void jbd_free(void *ptr, size_t size)
 {
 	free_pages((unsigned long)ptr, get_order(size));
-};
+}
 
 #define JFS_MIN_JOURNAL_BLOCKS 1024