JFS: Fix i_blocks accounting when allocation fails

A failure in dbAlloc caused a directory's i_blocks to be incorrectly
incremented, causing jfs_fsck to find the inode to be corrupt.

Signed-off-by: Dave Kleikamp <shaggy@austin.ibm.com>

1 files changed, 9 insertions, 4 deletions

diff --git a/fs/jfs/jfs_dtree.c b/fs/jfs/jfs_dtree.c
index 73b5fc7eda80..404f33eae507 100644
--- a/fs/jfs/jfs_dtree.c
+++ b/fs/jfs/jfs_dtree.c
@@ -381,9 +381,12 @@ static u32 add_index(tid_t tid, struct inode *ip, s64 bn, int slot)
                  * It's time to move the inline table to an external
                  * page and begin to build the xtree
                  */
-                if (DQUOT_ALLOC_BLOCK(ip, sbi->nbperpage) ||
-                    dbAlloc(ip, 0, sbi->nbperpage, &xaddr))
-                        goto clean_up;  /* No space */
+                if (DQUOT_ALLOC_BLOCK(ip, sbi->nbperpage))
+                        goto clean_up;
+                if (dbAlloc(ip, 0, sbi->nbperpage, &xaddr)) {
+                        DQUOT_FREE_BLOCK(ip, sbi->nbperpage);
+                        goto clean_up;
+                }
 
                 /*
                  * Save the table, we're going to overwrite it with the
@@ -397,13 +400,15 @@ static u32 add_index(tid_t tid, struct inode *ip, s64 bn, int slot)
                 xtInitRoot(tid, ip);
 
                 /*
-                 * Allocate the first block & add it to the xtree
+                 * Add the first block to the xtree
                  */
                 if (xtInsert(tid, ip, 0, 0, sbi->nbperpage, &xaddr, 0)) {
                         /* This really shouldn't fail */
                         jfs_warn("add_index: xtInsert failed!");
                         memcpy(&jfs_ip->i_dirtable, temp_table,
                                sizeof (temp_table));
+                        dbFree(ip, xaddr, sbi->nbperpage);
+                        DQUOT_FREE_BLOCK(ip, sbi->nbperpage);
                         goto clean_up;
                 }
                 ip->i_size = PSIZE;