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Update the quota scrubber to allow dquots where the realtime block count
exceeds the block count of the rt volume if reflink is enabled.
Signed-off-by: Darrick J. Wong <djwong@kernel.org>
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Signed-off-by: Darrick J. Wong <djwong@kernel.org>
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Use the realtime refcount btree to cross-reference other data
structures.
Signed-off-by: Darrick J. Wong <djwong@kernel.org>
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Add code to scrub realtime refcount btrees.
Signed-off-by: Darrick J. Wong <djwong@kernel.org>
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Whenever we encounter corrupt realtime refcount btree blocks, we should
report that to the health monitoring system for later reporting.
Signed-off-by: Darrick J. Wong <djwong@kernel.org>
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If we're adding a realtime section to the filesystem, create the rt
refcount btree inode before we start adding rt space.
Signed-off-by: Darrick J. Wong <djwong@kernel.org>
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The size of filesystem transaction reservations depends on the maximum
height (maxlevels) of the realtime btrees. Since we don't want a grow
operation to increase the reservation size enough that we'll fail the
minimum log size checks on the next mount, constrain growfs operations
if they would cause an increase in the rt refcount btree maxlevels.
Signed-off-by: Darrick J. Wong <djwong@kernel.org>
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Wire up the copy-on-write extent size hint for realtime files, and
connect it to the rt allocator so that we avoid fragmentation on rt
filesystems.
Signed-off-by: Darrick J. Wong <djwong@kernel.org>
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The copy-on-write extent size hint is subject to the same alignment
constraints as the regular extent size hint. Since we're in the process
of adding reflink (and therefore CoW) to the realtime device, we must
apply the same scattered rextsize alignment validation strategies to
both hints to deal with the possibility of rextsize changing.
Therefore, fix the inode validator to perform rextsize alignment checks
on regular realtime files, and to remove misaligned directory hints.
Signed-off-by: Darrick J. Wong <djwong@kernel.org>
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Currently, we (ab)use xfs_get_extsz_hint so that it always returns a
nonzero value for realtime files. This apparently was done to disable
delayed allocation for realtime files.
However, once we enable realtime reflink, we can also turn on the
alwayscow flag to force CoW writes to realtime files. In this case, the
logic will incorrectly send the write through the delalloc write path.
Fix this by adjusting the logic slightly.
Signed-off-by: Darrick J. Wong <djwong@kernel.org>
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Scan the realtime refcount tree at mount time to get rid of leftover
CoW staging extents.
Signed-off-by: Darrick J. Wong <djwong@kernel.org>
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Now that we can share blocks between realtime files, allow this
combination.
Signed-off-by: Darrick J. Wong <djwong@kernel.org>
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Update the remapping routines to be able to handle realtime files.
Signed-off-by: Darrick J. Wong <djwong@kernel.org>
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Update our write paths to support copy on write on the rt volume. This
works in more or less the same way as it does on the data device, with
the major exception that we never do delalloc on the rt volume.
Because we consider unwritten CoW fork staging extents to be incore
quota reservation, we update xfs_quota_reserve_blkres to support this
case. Though xfs doesn't allow rt and quota together, the change is
trivial and we shouldn't leave a logic bomb here.
Signed-off-by: Darrick J. Wong <djwong@kernel.org>
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Hoist all quota updates for reflink into a helper function, since things
are about to become more complicated.
Signed-off-by: Darrick J. Wong <djwong@kernel.org>
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Compute the maximum possible height of the realtime rmap btree when
reflink is enabled.
Signed-off-by: Darrick J. Wong <djwong@kernel.org>
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Don't error out on CoW staging extent records when realtime reflink is
enabled.
Signed-off-by: Darrick J. Wong <djwong@kernel.org>
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Variable names in this code module are inconsistent and confusing.
xfs_phys_extent describe physical mappings, so rename them "pmap".
xfs_refcount_intents describe refcount intents, so rename them "ri".
Signed-off-by: Darrick J. Wong <djwong@kernel.org>
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Create a library routine to allocate and initialize an empty realtime
refcountbt inode. We'll use this for growfs, mkfs, and repair.
Signed-off-by: Darrick J. Wong <djwong@kernel.org>
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Wire up realtime refcount btree cursors wherever they're needed
throughout the code base.
Signed-off-by: Darrick J. Wong <djwong@kernel.org>
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Plumb in the pieces we need to embed the root of the realtime refcount
btree in an inode's data fork, complete with new fork type and
on-disk interpretation functions.
Signed-off-by: Darrick J. Wong <djwong@kernel.org>
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Reserve some free blocks so that we will always have enough free blocks
in the data volume to handle expansion of the realtime refcount btree.
Signed-off-by: Darrick J. Wong <djwong@kernel.org>
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Add a metadir path to select the realtime refcount btree inode and load
it at mount time. The rtrefcountbt inode will have a unique extent format
code, which means that we also have to update the inode validation and
flush routines to look for it.
Signed-off-by: Darrick J. Wong <djwong@kernel.org>
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Identify rt refcount btree blocks in the log correctly so that we can
validate them during log recovery.
Signed-off-by: Darrick J. Wong <djwong@kernel.org>
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Now that we have reflink on the realtime device, refcount intent items
have to support remapping extents on the realtime volume.
Signed-off-by: Darrick J. Wong <djwong@kernel.org>
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Extend the refcount update (CUI) log items with a new realtime flag that
indicates that the updates apply against the realtime refcountbt. We'll
wire up the actual refcount code later.
Signed-off-by: Darrick J. Wong <djwong@kernel.org>
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Prepare the high-level refcount functions to deal with the new realtime
refcountbt and its slightly different conventions. Provide the ability
to talk to either refcountbt or rtrefcountbt formats from the same high
level code.
Note that we leave the _recover_cow_leftovers functions for a separate
patch so that we can convert it all at once.
Signed-off-by: Darrick J. Wong <djwong@kernel.org>
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Implement the generic btree operations needed to manipulate rtrefcount
btree blocks. This is different from the regular refcountbt in that we
allocate space from the filesystem at large, and are neither constrained
to the free space nor any particular AG.
Signed-off-by: Darrick J. Wong <djwong@kernel.org>
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Make sure that there's enough log reservation to handle mapping
and unmapping realtime extents. We have to reserve enough space
to handle a split in the rtrefcountbt to add the record and a second
split in the regular refcountbt to record the rtrefcountbt split.
Signed-off-by: Darrick J. Wong <djwong@kernel.org>
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Start filling out the rtrefcount btree implementation. Start with the
on-disk btree format; add everything needed to read, write and
manipulate refcount btree blocks. This prepares the way for connecting
the btree operations implementation.
Signed-off-by: Darrick J. Wong <djwong@kernel.org>
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Add new realtime refcount btree definitions. The realtime refcount btree
will be rooted from a hidden inode, but has its own shape and therefore
needs to have most of its own separate types.
Signed-off-by: Darrick J. Wong <djwong@kernel.org>
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Change the startblock and blockcount fields of xfs_refcount_irec to be
64 bits wide. This enables us to use the same high level refcount code
for either tree. We'll also collect all the resulting breakage fixes
here.
Signed-off-by: Darrick J. Wong <djwong@kernel.org>
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In preparation for widening the refcount code to accept 64-bit extents,
clean up the method signature for xfs_reflink_find_shared by passing in
the bmbt irec that both callers are checking, and pass back out the same
types that are found in the irec. Make the function static since there
are fewer callers than there used to be.
Signed-off-by: Darrick J. Wong <djwong@kernel.org>
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Remove this single-use helper.
Signed-off-by: Darrick J. Wong <djwong@kernel.org>
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Pass the incore refcount intent structure to the tracepoints instead of
open-coding the argument passing.
Signed-off-by: Darrick J. Wong <djwong@kernel.org>
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Pass the incore refcount intent through the CUI logging code instead of
repeatedly boxing and unboxing parameters. We'll clean up the
tracepoints shortly.
Signed-off-by: Darrick J. Wong <djwong@kernel.org>
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Prepare the rest of refcount btree tracepoints for use with realtime
reflink by making them take the btree cursor object as a parameter.
This will save us a lot of trouble later on.
Remove the xfs_refcount_recover_extent tracepoint since it's already
covered by other refcount tracepoints.
Signed-off-by: Darrick J. Wong <djwong@kernel.org>
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The only user of the "ag" tracepoint event classes is the refcount
btree, so rename them to make that obvious and make them take the btree
cursor to simplify the arguments. This will save us a lot of trouble
later on.
Signed-off-by: Darrick J. Wong <djwong@kernel.org>
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Convert all the refcount tracepoints to use the btree error tracepoint
class.
Signed-off-by: Darrick J. Wong <djwong@kernel.org>
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Don't allow inode allocations from this group if it's marked noalloc.
Signed-off-by: Darrick J. Wong <djwong@kernel.org>
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Add an administrative interface so that userspace can hide an allocation
group from block allocation.
Signed-off-by: Darrick J. Wong <djwong@kernel.org>
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Create a new noalloc state for the per-AG structure that will disable
block allocation in this AG. We accomplish this by subtracting from
fdblocks all the free blocks in this AG, hiding those blocks from the
allocator, and preventing freed blocks from updating fdblocks until
we're ready to lift noalloc mode.
Note that we reduce the free block count of the filesystem so that we
can prevent transactions from entering the allocator looking for "free"
space that we've turned off incore.
Signed-off-by: Darrick J. Wong <djwong@kernel.org>
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Compact the flags in the per-ag structure so that we use less space.
Signed-off-by: Darrick J. Wong <djwong@kernel.org>
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Signed-off-by: Darrick J. Wong <djwong@kernel.org>
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Repair the realtime rmap btree while mounted.
Signed-off-by: Darrick J. Wong <djwong@kernel.org>
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Rebuild the realtime bitmap from the realtime rmap btree.
Signed-off-by: Darrick J. Wong <djwong@kernel.org>
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Plumb into the inode core repair code the ability to search for extents
on realtime devices.
Signed-off-by: Darrick J. Wong <djwong@kernel.org>
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Repair the block mappings of realtime files.
Signed-off-by: Darrick J. Wong <djwong@kernel.org>
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When we're rebuilding the data device rmap, if we encounter an "rmap"
format fork, we have to walk the (realtime) rmap btree inode to build
the appropriate mappings.
Signed-off-by: Darrick J. Wong <djwong@kernel.org>
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Teach the bmbt scrubber how to perform a comprehensive check that the
rmapbt does not contain /any/ mappings that are not described by bmbt
records when it's dealing with a realtime file.
Signed-off-by: Darrick J. Wong <djwong@kernel.org>
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