This patch create space to hold default mount option,
and to use saved default mount option change super.c
to read default mount option first when mount devices.
Signed-off-by: Hidetoshi Seto <seto.hidetoshi@xxxxxxxxxxxxxx>
---
fs/btrfs/ctree.h | 5 ++++-
fs/btrfs/super.c | 2 ++
2 files changed, 6 insertions(+), 1 deletions(-)
diff --git a/fs/btrfs/ctree.h b/fs/btrfs/ctree.h
index fa5c45b..3eb0551 100644
--- a/fs/btrfs/ctree.h
+++ b/fs/btrfs/ctree.h
@@ -458,8 +458,11 @@ struct btrfs_super_block {
__le64 cache_generation;
+ /* default mount options */
+ unsigned long default_mount_opt;
+
/* future expansion */
- __le64 reserved[31];
+ __le64 reserved[30];
u8 sys_chunk_array[BTRFS_SYSTEM_CHUNK_ARRAY_SIZE];
struct btrfs_root_backup super_roots[BTRFS_NUM_BACKUP_ROOTS];
} __attribute__ ((__packed__));
diff --git a/fs/btrfs/super.c b/fs/btrfs/super.c
index e239915..7ef4a2e 100644
--- a/fs/btrfs/super.c
+++ b/fs/btrfs/super.c
@@ -340,6 +340,8 @@ int btrfs_parse_options(struct btrfs_root *root, char *options)
char *compress_type;
bool compress_force = false;
+ info->mount_opt = info->super_copy->default_mount_opt;
+
cache_gen = btrfs_super_cache_generation(root->fs_info->super_copy);
if (cache_gen)
btrfs_set_opt(info->mount_opt, SPACE_CACHE);
--
1.7.7.6
--
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