Merge branch 'for_linus' of git://git.kernel.org/pub/scm/linux/kernel/git/jack/linux-fs-2.6

* 'for_linus' of git://git.kernel.org/pub/scm/linux/kernel/git/jack/linux-fs-2.6:
  ext3: Always set dx_node's fake_dirent explicitly.
  ext3: Fix an overflow in ext3_trim_fs.
  jbd: Remove one to many n's in a word.
  ext3: skip orphan cleanup on rocompat fs
  ext2: Fix link count corruption under heavy link+rename load
  ext3: speed up group trim with the right free block count.
  ext3: Adjust trim start with first_data_block.
  quota: return -ENOMEM when memory allocation fails

3 files changed, 20 insertions, 10 deletions

diff --git a/fs/ext3/balloc.c b/fs/ext3/balloc.c
index 045995c8ce5..153242187fc 100644
--- a/fs/ext3/balloc.c
+++ b/fs/ext3/balloc.c
@@ -1991,6 +1991,7 @@ ext3_grpblk_t ext3_trim_all_free(struct super_block *sb, unsigned int group,
 		spin_unlock(sb_bgl_lock(sbi, group));
 		percpu_counter_sub(&sbi->s_freeblocks_counter, next - start);
 
+		free_blocks -= next - start;
 		/* Do not issue a TRIM on extents smaller than minblocks */
 		if ((next - start) < minblocks)
 			goto free_extent;
@@ -2040,7 +2041,7 @@ free_extent:
 		cond_resched();
 
 		/* No more suitable extents */
-		if ((free_blocks - count) < minblocks)
+		if (free_blocks < minblocks)
 			break;
 	}
 
@@ -2090,7 +2091,8 @@ int ext3_trim_fs(struct super_block *sb, struct fstrim_range *range)
 	ext3_fsblk_t max_blks = le32_to_cpu(es->s_blocks_count);
 	int ret = 0;
 
-	start = range->start >> sb->s_blocksize_bits;
+	start = (range->start >> sb->s_blocksize_bits) +
+		le32_to_cpu(es->s_first_data_block);
 	len = range->len >> sb->s_blocksize_bits;
 	minlen = range->minlen >> sb->s_blocksize_bits;
 	trimmed = 0;
@@ -2099,10 +2101,6 @@ int ext3_trim_fs(struct super_block *sb, struct fstrim_range *range)
 		return -EINVAL;
 	if (start >= max_blks)
 		goto out;
-	if (start < le32_to_cpu(es->s_first_data_block)) {
-		len -= le32_to_cpu(es->s_first_data_block) - start;
-		start = le32_to_cpu(es->s_first_data_block);
-	}
 	if (start + len > max_blks)
 		len = max_blks - start;
 
@@ -2129,10 +2127,15 @@ int ext3_trim_fs(struct super_block *sb, struct fstrim_range *range)
 		if (free_blocks < minlen)
 			continue;
 
-		if (len >= EXT3_BLOCKS_PER_GROUP(sb))
-			len -= (EXT3_BLOCKS_PER_GROUP(sb) - first_block);
-		else
+		/*
+		 * For all the groups except the last one, last block will
+		 * always be EXT3_BLOCKS_PER_GROUP(sb), so we only need to
+		 * change it for the last group in which case first_block +
+		 * len < EXT3_BLOCKS_PER_GROUP(sb).
+		 */
+		if (first_block + len < EXT3_BLOCKS_PER_GROUP(sb))
 			last_block = first_block + len;
+		len -= last_block - first_block;
 
 		ret = ext3_trim_all_free(sb, group, first_block,
 					last_block, minlen);
diff --git a/fs/ext3/namei.c b/fs/ext3/namei.c
index 0521a007ae6..32f3b869585 100644
--- a/fs/ext3/namei.c
+++ b/fs/ext3/namei.c
@@ -1540,8 +1540,8 @@ static int ext3_dx_add_entry(handle_t *handle, struct dentry *dentry,
 			goto cleanup;
 		node2 = (struct dx_node *)(bh2->b_data);
 		entries2 = node2->entries;
+		memset(&node2->fake, 0, sizeof(struct fake_dirent));
 		node2->fake.rec_len = ext3_rec_len_to_disk(sb->s_blocksize);
-		node2->fake.inode = 0;
 		BUFFER_TRACE(frame->bh, "get_write_access");
 		err = ext3_journal_get_write_access(handle, frame->bh);
 		if (err)
diff --git a/fs/ext3/super.c b/fs/ext3/super.c
index 9cc19a1dea8..071689f86e1 100644
--- a/fs/ext3/super.c
+++ b/fs/ext3/super.c
@@ -1464,6 +1464,13 @@ static void ext3_orphan_cleanup (struct super_block * sb,
 		return;
 	}
 
+	/* Check if feature set allows readwrite operations */
+	if (EXT3_HAS_RO_COMPAT_FEATURE(sb, ~EXT3_FEATURE_RO_COMPAT_SUPP)) {
+		ext3_msg(sb, KERN_INFO, "Skipping orphan cleanup due to "
+			 "unknown ROCOMPAT features");
+		return;
+	}
+
 	if (EXT3_SB(sb)->s_mount_state & EXT3_ERROR_FS) {
 		if (es->s_last_orphan)
 			jbd_debug(1, "Errors on filesystem, "