From the very beginning of free-space-tree feature, we allow mount
option "space_cache=v2" to convert the filesystem to the new feature.
But this is not the proper practice for new features (no matter if it's
incompat or compat_ro).
This is already making the clear_cache/space_cache mount option more
complex.
Thus this patch introduces the proper way to enable free-space-tree, and
I hope one day we can deprecate the "space_cache=" mount option.
Signed-off-by: Qu Wenruo <wqu@suse.com>
Signed-off-by: David Sterba <dsterba@suse.com>
Currently check/clear-cache.c still uses a lot of global variables like
gfs_info and g_task_ctx, which are only implemented in check/main.c.
Since we have separated clear-cache code into its own c and header files,
we should not utilize those global variables.
Or it would lead to compiling errors for any tools which only has
check/clear-cache.o linked:
/usr/bin/ld: check/clear-cache.o: in function `clear_free_space_cache':
/home/adam/btrfs/btrfs-progs/check/clear-cache.c:46: undefined reference to `gfs_info'
/usr/bin/ld: /home/adam/btrfs/btrfs-progs/check/clear-cache.c:56: undefined reference to `gfs_info'
/usr/bin/ld: /home/adam/btrfs/btrfs-progs/check/clear-cache.c:67: undefined reference to `gfs_info'
/usr/bin/ld: /home/adam/btrfs/btrfs-progs/check/clear-cache.c:73: undefined reference to `gfs_info'
/usr/bin/ld: /home/adam/btrfs/btrfs-progs/check/clear-cache.c:84: undefined reference to `gfs_info'
/usr/bin/ld: check/clear-cache.o:/home/adam/btrfs/btrfs-progs/check/clear-cache.c:85: more undefined references to `gfs_info' follow
/usr/bin/ld: check/clear-cache.o: in function `check_space_cache':
/home/adam/btrfs/btrfs-progs/check/clear-cache.c:357: undefined reference to `g_task_ctx'
/usr/bin/ld: /home/adam/btrfs/btrfs-progs/check/clear-cache.c:357: undefined reference to `g_task_ctx'
/usr/bin/ld: /home/adam/btrfs/btrfs-progs/check/clear-cache.c:358: undefined reference to `gfs_info'
/usr/bin/ld: /home/adam/btrfs/btrfs-progs/check/clear-cache.c:365: undefined reference to `gfs_info'
/usr/bin/ld: /home/adam/btrfs/btrfs-progs/check/clear-cache.c:373: undefined reference to `gfs_info'
/usr/bin/ld: /home/adam/btrfs/btrfs-progs/check/clear-cache.c:374: undefined reference to `gfs_info'
/usr/bin/ld: /home/adam/btrfs/btrfs-progs/check/clear-cache.c:382: undefined reference to `gfs_info'
/usr/bin/ld: check/clear-cache.o:/home/adam/btrfs/btrfs-progs/check/clear-cache.c:383: more undefined references to `gfs_info' follow
collect2: error: ld returned 1 exit status
This provides the basis for later clear cache usage out of check realm.
Signed-off-by: Qu Wenruo <wqu@suse.com>
Signed-off-by: David Sterba <dsterba@suse.com>
Qu Wenruo
David Sterba