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2017-04-25xfs: remove bmap block allocation retriesChristoph Hellwig2-46/+0
Now that reflink operations don't set the firstblock value we don't need the workarounds for non-NULL firstblock values without a prior allocation. Signed-off-by: Christoph Hellwig <hch@lst.de> Reviewed-by: Darrick J. Wong <darrick.wong@oracle.com> Signed-off-by: Darrick J. Wong <darrick.wong@oracle.com>
2017-04-25xfs: remove xfs_bmap_remap_allocChristoph Hellwig2-83/+2
The main thing that xfs_bmap_remap_alloc does is fixing the AGFL, similar to what we do in the space allocator. But the reflink code doesn't touch the allocation btree unlike the normal space allocator, so we couldn't care less about the state of the AGFL. So remove xfs_bmap_remap_alloc and just handle the di_nblocks update in the caller. Signed-off-by: Christoph Hellwig <hch@lst.de> Reviewed-by: Darrick J. Wong <darrick.wong@oracle.com> Signed-off-by: Darrick J. Wong <darrick.wong@oracle.com>
2017-04-25xfs: introduce xfs_bmapi_remapChristoph Hellwig1-45/+112
Add a new helper to be used for reflink extent list additions instead of funneling them through xfs_bmapi_write and overloading the firstblock member in struct xfs_bmalloca and struct xfs_alloc_args. With some small changes to xfs_bmap_remap_alloc this also means we do not need a xfs_bmalloca structure for this case at all. Signed-off-by: Christoph Hellwig <hch@lst.de> Reviewed-by: Darrick J. Wong <darrick.wong@oracle.com> Signed-off-by: Darrick J. Wong <darrick.wong@oracle.com>
2017-04-25xfs: pass individual arguments to xfs_bmap_add_extent_hole_realChristoph Hellwig1-59/+64
For the reflink case we'd much rather pass the required arguments than faking up a struct xfs_bmalloca. Signed-off-by: Christoph Hellwig <hch@lst.de> Reviewed-by: Darrick J. Wong <darrick.wong@oracle.com> Signed-off-by: Darrick J. Wong <darrick.wong@oracle.com>
2017-04-25xfs: remove attr fork handling in xfs_bmap_finish_oneChristoph Hellwig1-6/+3
We never do COW operations for the attr fork, so don't pretend we handle them. Signed-off-by: Christoph Hellwig <hch@lst.de> Reviewed-by: Darrick J. Wong <darrick.wong@oracle.com> Signed-off-by: Darrick J. Wong <darrick.wong@oracle.com>
2017-04-25xfs: fix integer truncation in xfs_bmap_remap_allocChristoph Hellwig1-1/+1
bno should be a xfs_fsblock_t, which is 64-bit wides instead of a xfs_aglock_t, which truncates the value to 32 bits. Signed-off-by: Christoph Hellwig <hch@lst.de> Reviewed-by: Darrick J. Wong <darrick.wong@oracle.com> Signed-off-by: Darrick J. Wong <darrick.wong@oracle.com>
2017-04-12xfs: drop iolock from reclaim context to appease lockdepBrian Foster2-9/+8
Lockdep complains about use of the iolock in inode reclaim context because it doesn't understand that reclaim has the last reference to the inode, and thus an iolock->reclaim->iolock deadlock is not possible. The iolock is technically not necessary in xfs_inactive() and was only added to appease an assert in xfs_free_eofblocks(), which can be called from other non-reclaim contexts. Therefore, just kill the assert and drop the use of the iolock from reclaim context to quiet lockdep. Signed-off-by: Brian Foster <bfoster@redhat.com> Reviewed-by: Darrick J. Wong <darrick.wong@oracle.com> Signed-off-by: Darrick J. Wong <darrick.wong@oracle.com>
2017-04-12xfs: remove custom do_div implementationsEric Sandeen1-85/+0
Long ago, all this gunk was added with a lament about problems with gcc's do_div, and a fun recommendation in the changelog: egcs-2.91.66 is the recommended compiler version for building XFS. All this special stuff was needed to work around an old gcc bug, apparently, and it's been there ever since. There should be no need for this anymore, so remove it. Remove the special 32-bit xfs_do_mod as well; just let the kernel's do_div() handle all this. Signed-off-by: Eric Sandeen <sandeen@redhat.com> Reviewed-by: Brian Foster <bfoster@redhat.com> Reviewed-by: Christoph Hellwig <hch@lst.de> Reviewed-by: Darrick J. Wong <darrick.wong@oracle.com> Signed-off-by: Darrick J. Wong <darrick.wong@oracle.com>
2017-04-12xfs: simplify xfs_calc_dquots_per_chunkEric Sandeen1-6/+1
ndquots is a 32-bit value, and we don't care about the remainder; there is no reason to use do_div here, it seems to be the result of a decade+ historical accident. Worse, the do_div implementation in userspace breaks when fed a 32-bit dividend, so we commented it out there in any case. Change to simple division, and then we can change userspace to match, and mandate a 64-bit dividend in the do_div() in userspace as well. Signed-off-by: Eric Sandeen <sandeen@redhat.com>
2017-04-07xfs: actually report xattr extents via iomapDarrick J. Wong1-2/+2
Apparently FIEMAP for xattrs has been broken since we switched to the iomap backend because of an incorrect check for xattr presence. Also fix the broken locking. Signed-off-by: Darrick J. Wong <darrick.wong@oracle.com> Reviewed-by: Brian Foster <bfoster@redhat.com> Reviewed-by: Christoph Hellwig <hch@lst.de>
2017-04-07xfs: fold __xfs_trans_roll into xfs_trans_rollChristoph Hellwig2-16/+2
No one cares about the low-level helper anymore. Signed-off-by: Christoph Hellwig <hch@lst.de> Reviewed-by: Eric Sandeen <sandeen@redhat.com> Reviewed-by: Darrick J. Wong <darrick.wong@oracle.com> Signed-off-by: Darrick J. Wong <darrick.wong@oracle.com>
2017-04-04xfs: report realtime space information via the rtbitmapDarrick J. Wong1-1/+119
Use the realtime bitmap to return free space information via getfsmap. Eventually this will be superseded by the realtime rmapbt code. Signed-off-by: Darrick J. Wong <darrick.wong@oracle.com> Reviewed-by: Brian Foster <bfoster@redhat.com>
2017-04-04xfs: have getfsmap fall back to the freesp btrees when rmap is not presentDarrick J. Wong1-3/+69
If the reverse-mapping btree isn't available, fall back to the free space btrees to provide partial reverse mapping information. The online scrub tool can make use of even partial information to speed up the data block scan. Signed-off-by: Darrick J. Wong <darrick.wong@oracle.com> Reviewed-by: Brian Foster <bfoster@redhat.com>
2017-04-04xfs: implement the GETFSMAP ioctlDarrick J. Wong12-0/+1048
Introduce a new ioctl that uses the reverse mapping btree to return information about the physical layout of the filesystem. Signed-off-by: Darrick J. Wong <darrick.wong@oracle.com> Reviewed-by: Brian Foster <bfoster@redhat.com>
2017-04-04xfs: add a couple of queries to iterate free extents in the rtbitmapDarrick J. Wong2-2/+90
Add _query_range and _query_all functions to the realtime bitmap allocator. These two functions are similar in usage to the btree functions with the same name and will be used for getfsmap and scrub. Signed-off-by: Darrick J. Wong <darrick.wong@oracle.com> Reviewed-by: Brian Foster <bfoster@redhat.com>
2017-04-04xfs: create a function to query all records in a btreeDarrick J. Wong6-7/+57
Create a helper function that will query all records in a btree. This will be used by the online repair functions to examine every record in a btree to rebuild a second btree. Signed-off-by: Darrick J. Wong <darrick.wong@oracle.com> Reviewed-by: Brian Foster <bfoster@redhat.com>
2017-04-04xfs: provide a query_range function for freespace btreesDarrick J. Wong2-0/+52
Implement a query_range function for the bnobt and cntbt. This will be used for getfsmap fallback if there is no rmapbt and by the online scrub and repair code. Signed-off-by: Darrick J. Wong <darrick.wong@oracle.com> Reviewed-by: Brian Foster <bfoster@redhat.com>
2017-04-04xfs: plumb in needed functions for range querying of the freespace btreesDarrick J. Wong1-43/+129
Plumb in the pieces (init_high_key, diff_two_keys) necessary to call query_range on the free space btrees. Remove the debugging asserts so that we can make queries starting from block 0. While we're at it, merge the redundant "if (btnum ==" hunks. Signed-off-by: Darrick J. Wong <darrick.wong@oracle.com> Reviewed-by: Brian Foster <bfoster@redhat.com>