@@ -3094,6 +3094,7 @@ ssize_t btrfs_listxattr(struct dentry *dentry, char *buffer, size_t size);
/* super.c */
int btrfs_parse_options(struct btrfs_root *root, char *options);
+void btrfs_chk_lzo_incompat(struct btrfs_root *root);
int btrfs_sync_fs(struct super_block *sb, int wait);
void btrfs_printk(struct btrfs_fs_info *fs_info, const char *fmt, ...);
void __btrfs_std_error(struct btrfs_fs_info *fs_info, const char *function,
@@ -401,6 +401,7 @@ int btrfs_parse_options(struct btrfs_root *root, char *options)
compress_type = "lzo";
info->compress_type = BTRFS_COMPRESS_LZO;
btrfs_set_opt(info->mount_opt, COMPRESS);
+ btrfs_chk_lzo_incompat(root);
} else if (strncmp(args[0].from, "no", 2) == 0) {
compress_type = "no";
info->compress_type = BTRFS_COMPRESS_NONE;
@@ -587,6 +588,23 @@ out:
}
/*
+ * Check the INCOMPAT features in the super block, and set the
+ * LZO INCOMPAT flag if it has not been set.
+ */
+void btrfs_chk_lzo_incompat(struct btrfs_root *root)
+{
+ struct btrfs_super_block *disk_super;
+ u64 features;
+
+ disk_super = root->fs_info->super_copy;
+ features = btrfs_super_incompat_flags(disk_super);
+ if (!(features & BTRFS_FEATURE_INCOMPAT_COMPRESS_LZO)) {
+ features |= BTRFS_FEATURE_INCOMPAT_COMPRESS_LZO;
+ btrfs_set_super_incompat_flags(disk_super, features);
+ }
+}
+
+/*
* Parse mount options that are required early in the mount process.
*
* All other options will be parsed on much later in the mount process and
In support of the recently added capability to remount with lzo compression, check the compression INCOMPAT flags when remounting with lzo compression, and set the flags if necessary. Signed-off-by: Mitch Harder <mitch.harder@sabayonlinux.org> --- v1-v2: - Remove extraneous formatting change. fs/btrfs/ctree.h | 1 + fs/btrfs/super.c | 18 ++++++++++++++++++ 2 files changed, 19 insertions(+), 0 deletions(-)