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authorDarrick J. Wong <darrick.wong@oracle.com>2019-07-04 05:36:29 +0200
committerDarrick J. Wong <darrick.wong@oracle.com>2019-07-04 16:52:24 +0200
commitbf3cb394479210a9ebcf8fef7a7f8fcabc7b9928 (patch)
treeb1e1742480e6775b16317046b6eec682d8f6ef7d /include/asm-generic/irqflags.h
parentxfs: specify AG in bulk req (diff)
downloadlinux-bf3cb394479210a9ebcf8fef7a7f8fcabc7b9928.tar.xz
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xfs: allow single bulkstat of special inodes
Create a new bulk ireq flag that enables userspace to ask us for a special inode number instead of interpreting @ino as a literal inode number. This enables us to query the root inode easily. The reason for adding the ability to query specifically the root directory inode is that certain programs (xfsdump and xfsrestore) want to confirm when they've been pointed to the root directory. The userspace code assumes the root directory is always the first result from calling bulkstat with lastino == 0, but this isn't true if the (initial btree roots + initial AGFL + inode alignment padding) is itself long enough to be allocated to new inodes if all of those blocks should happen to be free at the same time. Rather than make userspace guess at internal filesystem state, we provide a direct query. Signed-off-by: Darrick J. Wong <darrick.wong@oracle.com> Reviewed-by: Allison Collins <allison.henderson@oracle.com> Reviewed-by: Brian Foster <bfoster@redhat.com>
Diffstat (limited to 'include/asm-generic/irqflags.h')
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