ext4: add error checking to calls to ext4_handle_dirty_metadata()

Call ext4_std_error() in various places when we can't bail out
cleanly, so the file system can be marked as in error.

Signed-off-by: "Theodore Ts'o" <tytso@mit.edu>

1 files changed, 46 insertions, 18 deletions

diff --git a/fs/ext4/resize.c b/fs/ext4/resize.c
index dc963929de65..7faf47dde7fb 100644
--- a/fs/ext4/resize.c
+++ b/fs/ext4/resize.c
@@ -220,7 +220,11 @@ static int setup_new_group_blocks(struct super_block *sb,
                 memcpy(gdb->b_data, sbi->s_group_desc[i]->b_data, gdb->b_size);
                 set_buffer_uptodate(gdb);
                 unlock_buffer(gdb);
-                ext4_handle_dirty_metadata(handle, NULL, gdb);
+                err = ext4_handle_dirty_metadata(handle, NULL, gdb);
+                if (unlikely(err)) {
+                        brelse(gdb);
+                        goto exit_bh;
+                }
                 ext4_set_bit(bit, bh->b_data);
                 brelse(gdb);
         }
@@ -253,7 +257,11 @@ static int setup_new_group_blocks(struct super_block *sb,
 
         ext4_mark_bitmap_end(input->blocks_count, sb->s_blocksize * 8,
                              bh->b_data);
-        ext4_handle_dirty_metadata(handle, NULL, bh);
+        err = ext4_handle_dirty_metadata(handle, NULL, bh);
+        if (unlikely(err)) {
+                ext4_std_error(sb, err);
+                goto exit_bh;
+        }
         brelse(bh);
         /* Mark unused entries in inode bitmap used */
         ext4_debug("clear inode bitmap %#04llx (+%llu)\n",
@@ -265,7 +273,9 @@ static int setup_new_group_blocks(struct super_block *sb,
 
         ext4_mark_bitmap_end(EXT4_INODES_PER_GROUP(sb), sb->s_blocksize * 8,
                              bh->b_data);
-        ext4_handle_dirty_metadata(handle, NULL, bh);
+        err = ext4_handle_dirty_metadata(handle, NULL, bh);
+        if (unlikely(err))
+                ext4_std_error(sb, err);
 exit_bh:
         brelse(bh);
 
@@ -417,17 +427,21 @@ static int add_new_gdb(handle_t *handle, struct inode *inode,
                 goto exit_dind;
         }
 
-        if ((err = ext4_journal_get_write_access(handle, EXT4_SB(sb)->s_sbh)))
+        err = ext4_journal_get_write_access(handle, EXT4_SB(sb)->s_sbh);
+        if (unlikely(err))
                 goto exit_dind;
 
-        if ((err = ext4_journal_get_write_access(handle, *primary)))
+        err = ext4_journal_get_write_access(handle, *primary);
+        if (unlikely(err))
                 goto exit_sbh;
 
-        if ((err = ext4_journal_get_write_access(handle, dind)))
-                goto exit_primary;
+        err = ext4_journal_get_write_access(handle, dind);
+        if (unlikely(err))
+                ext4_std_error(sb, err);
 
         /* ext4_reserve_inode_write() gets a reference on the iloc */
-        if ((err = ext4_reserve_inode_write(handle, inode, &iloc)))
+        err = ext4_reserve_inode_write(handle, inode, &iloc);
+        if (unlikely(err))
                 goto exit_dindj;
 
         n_group_desc = kmalloc((gdb_num + 1) * sizeof(struct buffer_head *),
@@ -449,12 +463,20 @@ static int add_new_gdb(handle_t *handle, struct inode *inode,
          * reserved inode, and will become GDT blocks (primary and backup).
          */
         data[gdb_num % EXT4_ADDR_PER_BLOCK(sb)] = 0;
-        ext4_handle_dirty_metadata(handle, NULL, dind);
-        brelse(dind);
+        err = ext4_handle_dirty_metadata(handle, NULL, dind);
+        if (unlikely(err)) {
+                ext4_std_error(sb, err);
+                goto exit_inode;
+        }
         inode->i_blocks -= (gdbackups + 1) * sb->s_blocksize >> 9;
         ext4_mark_iloc_dirty(handle, inode, &iloc);
         memset((*primary)->b_data, 0, sb->s_blocksize);
-        ext4_handle_dirty_metadata(handle, NULL, *primary);
+        err = ext4_handle_dirty_metadata(handle, NULL, *primary);
+        if (unlikely(err)) {
+                ext4_std_error(sb, err);
+                goto exit_inode;
+        }
+        brelse(dind);
 
         o_group_desc = EXT4_SB(sb)->s_group_desc;
         memcpy(n_group_desc, o_group_desc,
@@ -465,19 +487,19 @@ static int add_new_gdb(handle_t *handle, struct inode *inode,
         kfree(o_group_desc);
 
         le16_add_cpu(&es->s_reserved_gdt_blocks, -1);
-        ext4_handle_dirty_metadata(handle, NULL, EXT4_SB(sb)->s_sbh);
+        err = ext4_handle_dirty_metadata(handle, NULL, EXT4_SB(sb)->s_sbh);
+        if (err)
+                ext4_std_error(sb, err);
 
-        return 0;
+        return err;
 
 exit_inode:
         /* ext4_journal_release_buffer(handle, iloc.bh); */
         brelse(iloc.bh);
 exit_dindj:
         /* ext4_journal_release_buffer(handle, dind); */
-exit_primary:
-        /* ext4_journal_release_buffer(handle, *primary); */
 exit_sbh:
-        /* ext4_journal_release_buffer(handle, *primary); */
+        /* ext4_journal_release_buffer(handle, EXT4_SB(sb)->s_sbh); */
 exit_dind:
         brelse(dind);
 exit_bh:
@@ -660,7 +682,9 @@ static void update_backups(struct super_block *sb,
                         memset(bh->b_data + size, 0, rest);
                 set_buffer_uptodate(bh);
                 unlock_buffer(bh);
-                ext4_handle_dirty_metadata(handle, NULL, bh);
+                err = ext4_handle_dirty_metadata(handle, NULL, bh);
+                if (unlikely(err))
+                        ext4_std_error(sb, err);
                 brelse(bh);
         }
         if ((err2 = ext4_journal_stop(handle)) && !err)
@@ -878,7 +902,11 @@ int ext4_group_add(struct super_block *sb, struct ext4_new_group_data *input)
         /* Update the global fs size fields */
         sbi->s_groups_count++;
 
-        ext4_handle_dirty_metadata(handle, NULL, primary);
+        err = ext4_handle_dirty_metadata(handle, NULL, primary);
+        if (unlikely(err)) {
+                ext4_std_error(sb, err);
+                goto exit_journal;
+        }
 
         /* Update the reserved block counts only once the new group is
          * active. */