diff options
| author | Jan Kara <jack@suse.cz> | 2019-11-05 17:44:16 +0100 |
|---|---|---|
| committer | Theodore Ts'o <tytso@mit.edu> | 2019-11-05 16:00:48 -0500 |
| commit | a413036791d040e33badcc634453a4d0c0705499 (patch) | |
| tree | e975f73d65996deec9fcc1504ae28bd9f2c05e77 /fs/ext4/resize.c | |
| parent | f2890730f8292831b7741d89a65b9c6834d85ee6 (diff) | |
ext4: Provide function to handle transaction restarts
Provide ext4_journal_ensure_credits_fn() function to ensure transaction
has given amount of credits and call helper function to prepare for
restarting a transaction. This allows to remove some boilerplate code
from various places, add proper error handling for the case where
transaction extension or restart fails, and reduces following changes
needed for proper revoke record reservation tracking.
Signed-off-by: Jan Kara <jack@suse.cz>
Link: https://lore.kernel.org/r/20191105164437.32602-10-jack@suse.cz
Signed-off-by: Theodore Ts'o <tytso@mit.edu>
Diffstat (limited to 'fs/ext4/resize.c')
| -rw-r--r-- | fs/ext4/resize.c | 46 |
1 files changed, 10 insertions, 36 deletions
diff --git a/fs/ext4/resize.c b/fs/ext4/resize.c index c0e9aef376a7..3e4286b3901f 100644 --- a/fs/ext4/resize.c +++ b/fs/ext4/resize.c @@ -389,30 +389,6 @@ static struct buffer_head *bclean(handle_t *handle, struct super_block *sb, } /* - * If we have fewer than thresh credits, extend by EXT4_MAX_TRANS_DATA. - * If that fails, restart the transaction & regain write access for the - * buffer head which is used for block_bitmap modifications. - */ -static int extend_or_restart_transaction(handle_t *handle, int thresh) -{ - int err; - - if (ext4_handle_has_enough_credits(handle, thresh)) - return 0; - - err = ext4_journal_extend(handle, EXT4_MAX_TRANS_DATA); - if (err < 0) - return err; - if (err) { - err = ext4_journal_restart(handle, EXT4_MAX_TRANS_DATA); - if (err) - return err; - } - - return 0; -} - -/* * set_flexbg_block_bitmap() mark clusters [@first_cluster, @last_cluster] used. * * Helper function for ext4_setup_new_group_blocks() which set . @@ -451,8 +427,8 @@ static int set_flexbg_block_bitmap(struct super_block *sb, handle_t *handle, continue; } - err = extend_or_restart_transaction(handle, 1); - if (err) + err = ext4_journal_ensure_credits_batch(handle, 1); + if (err < 0) return err; bh = sb_getblk(sb, flex_gd->groups[group].block_bitmap); @@ -544,8 +520,8 @@ static int setup_new_flex_group_blocks(struct super_block *sb, struct buffer_head *gdb; ext4_debug("update backup group %#04llx\n", block); - err = extend_or_restart_transaction(handle, 1); - if (err) + err = ext4_journal_ensure_credits_batch(handle, 1); + if (err < 0) goto out; gdb = sb_getblk(sb, block); @@ -602,8 +578,8 @@ handle_bb: /* Initialize block bitmap of the @group */ block = group_data[i].block_bitmap; - err = extend_or_restart_transaction(handle, 1); - if (err) + err = ext4_journal_ensure_credits_batch(handle, 1); + if (err < 0) goto out; bh = bclean(handle, sb, block); @@ -631,8 +607,8 @@ handle_ib: /* Initialize inode bitmap of the @group */ block = group_data[i].inode_bitmap; - err = extend_or_restart_transaction(handle, 1); - if (err) + err = ext4_journal_ensure_credits_batch(handle, 1); + if (err < 0) goto out; /* Mark unused entries in inode bitmap used */ bh = bclean(handle, sb, block); @@ -1109,10 +1085,8 @@ static void update_backups(struct super_block *sb, sector_t blk_off, char *data, ext4_fsblk_t backup_block; /* Out of journal space, and can't get more - abort - so sad */ - if (ext4_handle_valid(handle) && - handle->h_buffer_credits == 0 && - ext4_journal_extend(handle, EXT4_MAX_TRANS_DATA) && - (err = ext4_journal_restart(handle, EXT4_MAX_TRANS_DATA))) + err = ext4_journal_ensure_credits_batch(handle, 1); + if (err < 0) break; if (meta_bg == 0) |