Commit [1] 3a1d4aa089 "btrfs-progs: fix fallthrough cases with proper
attributes" introduced a macro "fallthrough" to better handle compiler
warnings of fallthrough situations.
This macro is defined using the "__has_attribute" built-in
function-like macro, which was introduced in GCC 5. See [2]. It then
test for the "__fallthrough__" attribute, which was introduced in
GCC 7. See [3].
When compiling with a gcc version which supports "__has_attribute" and
not the "__fallthrough__" attribute, compilation fails with error
message:
common/format-output.c: In function 'print_escaped':
common/format-output.c:78:4: error: 'fallthrough' undeclared (first use in this function)
fallthrough;
^
btrfs-progs claim to support gcc at minimal version 4.8 in [4].
This commit fixes this issue by adding the missing definition.
The definition of the unsupported case is duplicated, because testing
for "__has_attribute" and an attribute at the same time is not
portable. See the cpp "__has_attribute" documentation [5].
Note: the issue was found with Buildroot Linux [6], while testing with
the command "utils/test-pkg -a -p btrfs-progs".
[1] 3a1d4aa089
[2] https://gcc.gnu.org/gcc-5/changes.html
[3] https://gcc.gnu.org/gcc-7/changes.html
[4] https://github.com/kdave/btrfs-progs/tree/v6.9.2#build-compatibility
[5] https://gcc.gnu.org/onlinedocs/cpp/_005f_005fhas_005fattribute.html
[6] https://buildroot.org/
Pull-request: #842
Signed-off-by: Julien Olivain <ju.o@free.fr>
Signed-off-by: David Sterba <dsterba@suse.com>
Bit shifts should be done on unsigned type as a matter of good practice
to avoid any problems with bit overflowing to the sign bit.
Signed-off-by: David Sterba <dsterba@suse.com>
Update parts of struct btrfs_delayed_ref_head and updated where used,
add more prototypes. More still needs to be synced.
Signed-off-by: David Sterba <dsterba@suse.com>
Here are the helpers and stubbed out functions to be able to sync in
ctree.c into btrfs-progs. These are various utilities the kernel
provides, 1 relocation and qgroup related function, and a trace point we
have in ctree.c.
Signed-off-by: Josef Bacik <josef@toxicpanda.com>
Signed-off-by: David Sterba <dsterba@suse.com>
This syncs tree-checker.c from the kernel. The main modification was to
add a open ctree flag to skip the deeper leaf checks, and plumbing this
through tree-checker.c. We need this for things like fsck or
btrfs-image that need to work with slightly corrupted file systems, and
these checks simply make us unable to look at the corrupted blocks.
Signed-off-by: Josef Bacik <josef@toxicpanda.com>
Signed-off-by: David Sterba <dsterba@suse.com>
We want locking.h to have all the definitions that get used throughout
the codebase, however we don't want to actually use any of the actual
locking. This sync's the bulk of locking.h, and then stubs out all of
the definitions. We need a locking.c for the root lock helpers that
return the extent buffer, but everything else can simply be inlined out.
Signed-off-by: Josef Bacik <josef@toxicpanda.com>
Signed-off-by: David Sterba <dsterba@suse.com>
This is a bit larger than the previous syncs, because we use
extent_io_tree's everywhere. There's a lot of stuff added to
kerncompat.h, and then I went through and cleaned up all the API
changes, which were
- extent_io_tree_init takes an fs_info and an owner now.
- extent_io_tree_cleanup is now extent_io_tree_release.
- set_extent_dirty takes a gfpmask.
- clear_extent_dirty takes a cached_state.
- find_first_extent_bit takes a cached_state.
The diffstat looks insane for this, but keep in mind extent-io-tree.c
and extent-io-tree.h are ~2000 loc just by themselves.
Signed-off-by: Josef Bacik <josef@toxicpanda.com>
Signed-off-by: David Sterba <dsterba@suse.com>
We won't actually use the async code in progs, however we call the
helpers and such all over the normal code, so sync this into btrfs-progs
to make syncing other parts of the kernel easier.
Signed-off-by: Josef Bacik <josef@toxicpanda.com>
Signed-off-by: David Sterba <dsterba@suse.com>
This syncs accessors.[ch] from the kernel. For the most part
accessors.h will remain the same, there's just some helpers that need to
be adjusted for eb->data instead of eb->pages. Additionally accessors.c
needed to be completely updated to deal with this as well.
This is a set of files where we will likely only sync the header going
forward, and leave the C file in place as it needs to be specific to
btrfs-progs.
This forced a few "unrelated" changes
- Using btrfs_dir_item_ftype() instead of btrfs_dir_item_type(). This
is due to the encryption changes, and was simpler to just do in this
patch.
- Adjusting some of the print tree code to use the actual helpers and
not the btrfs-progs ones.
A local definition of static_assert is used to avoid compilation
failures on older gcc (< 9) where the 2nd parameter is mandatory.
Signed-off-by: Josef Bacik <josef@toxicpanda.com>
Signed-off-by: David Sterba <dsterba@suse.com>
These are the printk helpers from the kernel. There were a few
modifications, the hi-lights are
- We do not have fs_info::fs_state, so that needed to be removed.
- We do not have discard.h sync'ed yet, so that dependency was dropped.
- Anything related to struct super_block was commented out.
- The transaction abort had to be modified to fit with the current
btrfs-progs code.
- Added a btrfs_no_printk() helper to common/messages.* so that the
print statements still worked.
- The 32bit limit checkers are not needed so are behind __KERNEL__
Additionally there were kerncompat.h changes that needed to be made to
handle the dependencies properly. Those are easier to spot.
Any function that needed to be modified has a MODIFIED tag in the
comment section with a list of things that were changed.
Signed-off-by: Josef Bacik <josef@toxicpanda.com>
Signed-off-by: David Sterba <dsterba@suse.com>
We want to keep this file locally as we want to be uptodate with
upstream, so we can build btrfs-progs regardless of which kernel is
currently installed. Sync this with the upstream version and put it in
kernel-shared/uapi to maintain some semblance of where this file comes
from.
There are some changes that need to be synced back to kernel. A local
definition of static_assert is used to avoid compilation problems on gcc
(< 9) due to mandatory 2nd parameter.
Signed-off-by: Josef Bacik <josef@toxicpanda.com>
Signed-off-by: David Sterba <dsterba@suse.com>
Everybody who calls print_trace wraps it around this check, move the
check instead to print_trace and remove the check from all the callers.
Signed-off-by: Josef Bacik <josef@toxicpanda.com>
Signed-off-by: David Sterba <dsterba@suse.com>
Now that we're properly separated with libbtrfs/kerncompat.h and
include/kerncompat.h, go ahead and add the __init definition back so we
can have it available for the kernel synced files.
Signed-off-by: Josef Bacik <josef@toxicpanda.com>
Signed-off-by: David Sterba <dsterba@suse.com>
Julien Olivain
David Sterba
Josef Bacik
Qu Wenruo