Messages in this thread Patch in this message | | | From | Jeffle Xu <> | Subject | [PATCH v7 08/19] erofs: add mode checking helper | Date | Thu, 31 Mar 2022 19:57:42 +0800 |
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Until then erofs is exactly blockdev based filesystem.
A new fscache-based mode is going to be introduced for erofs to support scenarios where on-demand read semantics is needed, e.g. container image distribution. In this case, erofs could be mounted from data blobs through fscache.
Add a helper checking which mode erofs works in.
Signed-off-by: Jeffle Xu <jefflexu@linux.alibaba.com> --- fs/erofs/internal.h | 5 +++++ 1 file changed, 5 insertions(+)
diff --git a/fs/erofs/internal.h b/fs/erofs/internal.h index fe9564e5091e..05a97533b1e9 100644 --- a/fs/erofs/internal.h +++ b/fs/erofs/internal.h @@ -161,6 +161,11 @@ struct erofs_sb_info { #define set_opt(opt, option) ((opt)->mount_opt |= EROFS_MOUNT_##option) #define test_opt(opt, option) ((opt)->mount_opt & EROFS_MOUNT_##option) +static inline bool erofs_is_fscache_mode(struct super_block *sb) +{ + return IS_ENABLED(CONFIG_EROFS_FS_ONDEMAND) && !sb->s_bdev; +} + enum { EROFS_ZIP_CACHE_DISABLED, EROFS_ZIP_CACHE_READAHEAD, -- 2.27.0
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