The migration ioctl creates a temporary inode. Since this inode is
never linked to a directory, we don't need to reserve journal credits
required for modifying the directory.
Signed-off-by: "Theodore Ts'o" <tytso@xxxxxxx>
---
fs/ext4/migrate.c | 11 +++++++----
1 file changed, 7 insertions(+), 4 deletions(-)
diff --git a/fs/ext4/migrate.c b/fs/ext4/migrate.c
index 4e4fcfd..480acf4 100644
--- a/fs/ext4/migrate.c
+++ b/fs/ext4/migrate.c
@@ -456,11 +456,14 @@ int ext4_ext_migrate(struct inode *inode)
*/
return retval;
+ /*
+ * Worst case we can touch the allocation bitmaps, a bgd
+ * block, and a block to link in the orphan list. We do need
+ * need to worry about credits for modifying the quota inode.
+ */
handle = ext4_journal_start(inode, EXT4_HT_MIGRATE,
- EXT4_DATA_TRANS_BLOCKS(inode->i_sb) +
- EXT4_INDEX_EXTRA_TRANS_BLOCKS + 3 +
- EXT4_MAXQUOTAS_INIT_BLOCKS(inode->i_sb)
- + 1);
+ 4 + EXT4_MAXQUOTAS_TRANS_BLOCKS(inode->i_sb));
+
if (IS_ERR(handle)) {
retval = PTR_ERR(handle);
return retval;
--
1.7.12.rc0.22.gcdd159b
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