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-rw-r--r--fs/ext4/super.c9
1 files changed, 7 insertions, 2 deletions
diff --git a/fs/ext4/super.c b/fs/ext4/super.c
index 9d15a6293124..829e4a7b59e4 100644
--- a/fs/ext4/super.c
+++ b/fs/ext4/super.c
@@ -1284,7 +1284,7 @@ enum {
Opt_noquota, Opt_barrier, Opt_nobarrier, Opt_err,
Opt_usrquota, Opt_grpquota, Opt_prjquota, Opt_i_version, Opt_dax,
Opt_stripe, Opt_delalloc, Opt_nodelalloc, Opt_mblk_io_submit,
- Opt_lazytime, Opt_nolazytime,
+ Opt_lazytime, Opt_nolazytime, Opt_debug_want_extra_isize,
Opt_nomblk_io_submit, Opt_block_validity, Opt_noblock_validity,
Opt_inode_readahead_blks, Opt_journal_ioprio,
Opt_dioread_nolock, Opt_dioread_lock,
@@ -1352,6 +1352,7 @@ static const match_table_t tokens = {
{Opt_delalloc, "delalloc"},
{Opt_lazytime, "lazytime"},
{Opt_nolazytime, "nolazytime"},
+ {Opt_debug_want_extra_isize, "debug_want_extra_isize=%u"},
{Opt_nodelalloc, "nodelalloc"},
{Opt_removed, "mblk_io_submit"},
{Opt_removed, "nomblk_io_submit"},
@@ -1557,6 +1558,7 @@ static const struct mount_opts {
#endif
{Opt_nouid32, EXT4_MOUNT_NO_UID32, MOPT_SET},
{Opt_debug, EXT4_MOUNT_DEBUG, MOPT_SET},
+ {Opt_debug_want_extra_isize, 0, MOPT_GTE0},
{Opt_quota, EXT4_MOUNT_QUOTA | EXT4_MOUNT_USRQUOTA, MOPT_SET | MOPT_Q},
{Opt_usrquota, EXT4_MOUNT_QUOTA | EXT4_MOUNT_USRQUOTA,
MOPT_SET | MOPT_Q},
@@ -1670,6 +1672,8 @@ static int handle_mount_opt(struct super_block *sb, char *opt, int token,
if (arg == 0)
arg = JBD2_DEFAULT_MAX_COMMIT_AGE;
sbi->s_commit_interval = HZ * arg;
+ } else if (token == Opt_debug_want_extra_isize) {
+ sbi->s_want_extra_isize = arg;
} else if (token == Opt_max_batch_time) {
sbi->s_max_batch_time = arg;
} else if (token == Opt_min_batch_time) {
@@ -4081,7 +4085,8 @@ no_journal:
sb->s_flags |= MS_RDONLY;
/* determine the minimum size of new large inodes, if present */
- if (sbi->s_inode_size > EXT4_GOOD_OLD_INODE_SIZE) {
+ if (sbi->s_inode_size > EXT4_GOOD_OLD_INODE_SIZE &&
+ sbi->s_want_extra_isize == 0) {
sbi->s_want_extra_isize = sizeof(struct ext4_inode) -
EXT4_GOOD_OLD_INODE_SIZE;
if (ext4_has_feature_extra_isize(sb)) {