| Message ID | 20220406075612.60298-10-jefflexu@linux.alibaba.com (mailing list archive) |
|---|---|
| State | New, archived |
| Headers | show |
| Series | fscache,erofs: fscache-based on-demand read semantics | expand |
On Wed, Apr 06, 2022 at 03:56:01PM +0800, Jeffle Xu wrote: > 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> Reviewed-by: Gao Xiang <hsiangkao@linux.alibaba.com> Thanks, Gao Xiang > --- > 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
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,
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(+)