在 2024/7/12 09:35, fdmanana@xxxxxxxxxx 写道:
From: Filipe Manana <fdmanana@xxxxxxxx>
Commit 199d0a992536df3702a0c4843d2a449d54f399c2 ("common/btrfs: introduce
_require_btrfs_send_version") turned _require_btrfs_send_v2 into a generic
helper to detect support for any send stream version, however it's only
working for detecting kernel support, it misses detecting the support from
btrfs-progs - it always checks only that it supports v2 (the send command
supports the --compressed-data option).
Fix that by verifying that btrfs-progs supports the requested version.
Signed-off-by: Filipe Manana <fdmanana@xxxxxxxx>
---
common/btrfs | 21 +++++++++++++++++----
1 file changed, 17 insertions(+), 4 deletions(-)
diff --git a/common/btrfs b/common/btrfs
index be5948db..953dc2a0 100644
--- a/common/btrfs
+++ b/common/btrfs
@@ -777,17 +777,30 @@ _require_btrfs_corrupt_block()
_require_btrfs_send_version()
{
local version=$1
+ local ret
- # Check first if btrfs-progs supports the v2 stream.
- _require_btrfs_command send --compressed-data
-
- # Now check the kernel support. If send_stream_version does not exists,
+ # Check the kernel support. If send_stream_version does not exists,
# then it's a kernel that only supports v1.
[ -f /sys/fs/btrfs/features/send_stream_version ] || \
_notrun "kernel does not support send stream $version"
[ $(cat /sys/fs/btrfs/features/send_stream_version) -ge $version ] || \
_notrun "kernel does not support send stream $version"
+
+ # Now check that btrfs-progs supports the requested stream version.
+ _scratch_mkfs &> /dev/null || \
+ _fail "mkfs failed at _require_btrfs_send_version"
+ _scratch_mount
+ $BTRFS_UTIL_PROG subvolume snapshot -r $SCRATCH_MNT \
+ $SCRATCH_MNT/snap &> /dev/null
+ $BTRFS_UTIL_PROG send --proto $version -f /dev/null \
+ $SCRATCH_MNT/snap 2> /dev/null
IHMO we can just skip the -f option and redirect both stderr and stdout
into /dev/null.
Otherwise looks good to me.
Reviewed-by: Qu Wenruo <wqu@xxxxxxxx>
Thanks,
Qu
+ ret=$?
+ _scratch_unmount
+
+ if [ $ret -ne 0 ]; then
+ _notrun "btrfs-progs does not support send stream version $version"
+ fi
}
# Get the bytenr associated to a file extent item at a given file offset.
