@@ -3287,6 +3287,12 @@ int __cold open_ctree(struct super_block *sb, struct btrfs_fs_devices *fs_device
fs_info->csums_per_leaf = BTRFS_MAX_ITEM_SIZE(fs_info) / fs_info->csum_size;
fs_info->stripesize = stripesize;
+ /*
+ * Handle the space caching options appropriately now that we have the
+ * super loaded and validated.
+ */
+ btrfs_set_free_space_cache_settings(fs_info);
+
ret = btrfs_parse_options(fs_info, options, sb->s_flags);
if (ret)
goto fail_alloc;
@@ -3298,17 +3304,6 @@ int __cold open_ctree(struct super_block *sb, struct btrfs_fs_devices *fs_device
if (sectorsize < PAGE_SIZE) {
struct btrfs_subpage_info *subpage_info;
- /*
- * V1 space cache has some hardcoded PAGE_SIZE usage, and is
- * going to be deprecated.
- *
- * Force to use v2 cache for subpage case.
- */
- btrfs_clear_opt(fs_info->mount_opt, SPACE_CACHE);
- btrfs_set_and_info(fs_info, FREE_SPACE_TREE,
- "forcing free space tree for sector size %u with page size %lu",
- sectorsize, PAGE_SIZE);
-
btrfs_warn(fs_info,
"read-write for sector size %u with page size %lu is experimental",
sectorsize, PAGE_SIZE);
@@ -152,6 +152,7 @@ int btrfs_trim_block_group_bitmaps(struct btrfs_block_group *block_group,
bool btrfs_free_space_cache_v1_active(struct btrfs_fs_info *fs_info);
int btrfs_set_free_space_cache_v1_active(struct btrfs_fs_info *fs_info, bool active);
+
/* Support functions for running our sanity tests */
#ifdef CONFIG_BTRFS_FS_RUN_SANITY_TESTS
int test_add_free_space_entry(struct btrfs_block_group *cache,
@@ -266,6 +266,31 @@ static bool check_options(struct btrfs_fs_info *info, unsigned long flags)
return true;
}
+void btrfs_set_free_space_cache_settings(struct btrfs_fs_info *fs_info)
+{
+ if (btrfs_fs_compat_ro(fs_info, FREE_SPACE_TREE))
+ btrfs_set_opt(fs_info->mount_opt, FREE_SPACE_TREE);
+ else if (btrfs_free_space_cache_v1_active(fs_info)) {
+ if (btrfs_is_zoned(fs_info)) {
+ btrfs_info(fs_info,
+ "zoned: clearing existing space cache");
+ btrfs_set_super_cache_generation(fs_info->super_copy, 0);
+ } else {
+ btrfs_set_opt(fs_info->mount_opt, SPACE_CACHE);
+ }
+ }
+
+ if (fs_info->sectorsize < PAGE_SIZE) {
+ btrfs_clear_opt(fs_info->mount_opt, SPACE_CACHE);
+ if (!btrfs_test_opt(fs_info, FREE_SPACE_TREE)) {
+ btrfs_info(fs_info,
+ "forcing free space tree for sector size %u with page size %lu",
+ fs_info->sectorsize, PAGE_SIZE);
+ btrfs_set_opt(fs_info->mount_opt, FREE_SPACE_TREE);
+ }
+ }
+}
+
static int parse_rescue_options(struct btrfs_fs_info *info, const char *options)
{
char *opts;
@@ -345,18 +370,6 @@ int btrfs_parse_options(struct btrfs_fs_info *info, char *options,
bool saved_compress_force;
int no_compress = 0;
- if (btrfs_fs_compat_ro(info, FREE_SPACE_TREE))
- btrfs_set_opt(info->mount_opt, FREE_SPACE_TREE);
- else if (btrfs_free_space_cache_v1_active(info)) {
- if (btrfs_is_zoned(info)) {
- btrfs_info(info,
- "zoned: clearing existing space cache");
- btrfs_set_super_cache_generation(info->super_copy, 0);
- } else {
- btrfs_set_opt(info->mount_opt, SPACE_CACHE);
- }
- }
-
/*
* Even the options are empty, we still need to do extra check
* against new flags
@@ -649,8 +662,13 @@ int btrfs_parse_options(struct btrfs_fs_info *info, char *options,
* compat_ro(FREE_SPACE_TREE) set, and we aren't going
* to allow v1 to be set for extent tree v2, simply
* ignore this setting if we're extent tree v2.
+ *
+ * For subpage blocksize we don't allow space cache v1,
+ * and we'll turn on v2, so we can skip the settings
+ * here as well.
*/
- if (btrfs_fs_incompat(info, EXTENT_TREE_V2))
+ if (btrfs_fs_incompat(info, EXTENT_TREE_V2) ||
+ info->sectorsize < PAGE_SIZE)
break;
if (token == Opt_space_cache ||
strcmp(args[0].from, "v1") == 0) {
@@ -8,6 +8,7 @@ int btrfs_parse_options(struct btrfs_fs_info *info, char *options,
int btrfs_sync_fs(struct super_block *sb, int wait);
char *btrfs_get_subvol_name_from_objectid(struct btrfs_fs_info *fs_info,
u64 subvol_objectid);
+void btrfs_set_free_space_cache_settings(struct btrfs_fs_info *fs_info);
static inline struct btrfs_fs_info *btrfs_sb(struct super_block *sb)
{
Currently we pre-load the space cache settings in btrfs_parse_options, however when we switch to the new mount API the mount option parsing will happen before we have the super block loaded. Add a helper to set the appropriate options based on the fs settings, this will allow us to have consistent free space cache settings. This also folds in the space cache related decisions we make for subpage sectorsize support, so all of this is done in one place. Signed-off-by: Josef Bacik <josef@toxicpanda.com> --- fs/btrfs/disk-io.c | 17 +++++--------- fs/btrfs/free-space-cache.h | 1 + fs/btrfs/super.c | 44 ++++++++++++++++++++++++++----------- fs/btrfs/super.h | 1 + 4 files changed, 39 insertions(+), 24 deletions(-)