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Subject[PATCH 12/42] ext4: Don't add the inode to journal handle until after the block is allocated
Date
From: Aneesh Kumar K.V <aneesh.kumar@linux.vnet.ibm.com>

Make sure we don't add the inode to the journal handle until after the
block allocation, so that a journal commit will not include the inode in
case of block allocation failure.

Signed-off-by: Aneesh Kumar K.V <aneesh.kumar@linux.vnet.ibm.com>
Signed-off-by: Mingming Cao <cmm@us.ibm.com>
Signed-off-by: "Theodore Ts'o" <tytso@mit.edu>
---
fs/ext4/balloc.c | 2 +-
fs/ext4/inode.c | 36 +++++++++++++++---------------------
2 files changed, 16 insertions(+), 22 deletions(-)

diff --git a/fs/ext4/balloc.c b/fs/ext4/balloc.c
index 87b660b..02068fa 100644
--- a/fs/ext4/balloc.c
+++ b/fs/ext4/balloc.c
@@ -2060,7 +2060,7 @@ ext4_fsblk_t ext4_new_meta_blocks(handle_t *handle, struct inode *inode,
/*
* Account for the allocated meta blocks
*/
- if (!(*errp)) {
+ if (!(*errp) && EXT4_I(inode)->i_delalloc_reserved_flag) {
spin_lock(&EXT4_I(inode)->i_block_reservation_lock);
EXT4_I(inode)->i_allocated_meta_blocks += *count;
spin_unlock(&EXT4_I(inode)->i_block_reservation_lock);
diff --git a/fs/ext4/inode.c b/fs/ext4/inode.c
index b1a6a73..b567e71 100644
--- a/fs/ext4/inode.c
+++ b/fs/ext4/inode.c
@@ -2170,18 +2170,24 @@ static int ext4_da_get_block_write(struct inode *inode, sector_t iblock,
handle_t *handle = NULL;

handle = ext4_journal_current_handle();
- if (!handle) {
- ret = ext4_get_blocks_wrap(handle, inode, iblock, max_blocks,
- bh_result, 0, 0, 0);
- BUG_ON(!ret);
- } else {
- ret = ext4_get_blocks_wrap(handle, inode, iblock, max_blocks,
- bh_result, create, 0, EXT4_DELALLOC_RSVED);
- }
-
+ BUG_ON(!handle);
+ ret = ext4_get_blocks_wrap(handle, inode, iblock, max_blocks,
+ bh_result, create, 0, EXT4_DELALLOC_RSVED);
if (ret > 0) {
+
bh_result->b_size = (ret << inode->i_blkbits);

+ if (ext4_should_order_data(inode)) {
+ int retval;
+ retval = ext4_jbd2_file_inode(handle, inode);
+ if (retval)
+ /*
+ * Failed to add inode for ordered
+ * mode. Don't update file size
+ */
+ return retval;
+ }
+
/*
* Update on-disk size along with block allocation
* we don't use 'extend_disksize' as size may change
@@ -2407,18 +2413,6 @@ restart_loop:
dump_stack();
goto out_writepages;
}
- if (ext4_should_order_data(inode)) {
- /*
- * With ordered mode we need to add
- * the inode to the journal handl
- * when we do block allocation.
- */
- ret = ext4_jbd2_file_inode(handle, inode);
- if (ret) {
- ext4_journal_stop(handle);
- goto out_writepages;
- }
- }

to_write -= wbc->nr_to_write;
ret = mpage_da_writepages(mapping, wbc,
--
1.5.6.1.205.ge2c7.dirty


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