xfs: Check for extent overflow when adding dir entries
mainline inclusion from mainline-v5.12-rc1 commit f5d92749 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=f5d92749191402c50e32ac83dd9da3b910f5680f -------------------------------- Directory entry addition can cause the following, 1. Data block can be added/removed. A new extent can cause extent count to increase by 1. 2. Free disk block can be added/removed. Same behaviour as described above for Data block. 3. Dabtree blocks. XFS_DA_NODE_MAXDEPTH blocks can be added. Each of these can be new extents. Hence extent count can increase by XFS_DA_NODE_MAXDEPTH. Signed-off-by: NChandan Babu R <chandanrlinux@gmail.com> Reviewed-by: NDarrick J. Wong <darrick.wong@oracle.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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