xfs: Check for extent overflow when adding/removing xattrs
mainline inclusion from mainline-v5.12-rc1 commit 3a19bb14 category: bugfix bugzilla: 187510,https://gitee.com/openeuler/kernel/issues/I4KIAO Reference: https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=3a19bb147c72d2e9b77137bf5130b9cfb50a5eef -------------------------------- Adding/removing an xattr can cause XFS_DA_NODE_MAXDEPTH extents to be added. One extra extent for dabtree in case a local attr is large enough to cause a double split. It can also cause extent count to increase proportional to the size of a remote xattr's value. Reviewed-by: NDarrick J. Wong <darrick.wong@oracle.com> Reviewed-by: NChristoph Hellwig <hch@lst.de> Reviewed-by: NAllison Henderson <allison.henderson@oracle.com> Signed-off-by: NChandan Babu R <chandanrlinux@gmail.com> Signed-off-by: NDarrick J. Wong <darrick.wong@oracle.com> Conflict: commit 3a1af6c3 ("xfs: refactor common transaction/inode/quota allocation idiom") is backported, which introduce some conflicts on code context. Signed-off-by: NYu Kuai <yukuai3@huawei.com> Signed-off-by: NGuo Xuenan <guoxuenan@huawei.com> Reviewed-by: NZhang Yi <yi.zhang@huawei.com> Signed-off-by: NZheng Zengkai <zhengzengkai@huawei.com>
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