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The 'device' used to be added in that function, but now it's done by the
caller.
Reviewed-by: Liu Bo <[email protected]>
Signed-off-by: David Sterba <[email protected]>
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We grab fs_info from other parameters.
Reviewed-by: Liu Bo <[email protected]>
Signed-off-by: David Sterba <[email protected]>
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Never used for anything meaningful since we have our own superblock
filler.
Reviewed-by: Liu Bo <[email protected]>
Signed-off-by: David Sterba <[email protected]>
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The 'tree' was used to call locking hook that does not exist anymore.
Reviewed-by: Liu Bo <[email protected]>
Signed-off-by: David Sterba <[email protected]>
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Never used.
Reviewed-by: Liu Bo <[email protected]>
Signed-off-by: David Sterba <[email protected]>
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The logic has been updated in "Btrfs: make mapping->writeback_index
point to the last written page" (a91326679f2a0a4c2) and page is not
needed anymore.
Reviewed-by: Liu Bo <[email protected]>
Signed-off-by: David Sterba <[email protected]>
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This used to hold number of maximum pages to allocate, but this is now
limited by BIO_MAX_PAGES. The local are now unused and removed as well.
Reviewed-by: Liu Bo <[email protected]>
Signed-off-by: David Sterba <[email protected]>
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Not needed.
Reviewed-by: Liu Bo <[email protected]>
Signed-off-by: David Sterba <[email protected]>
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Never needed.
Reviewed-by: Liu Bo <[email protected]>
Signed-off-by: David Sterba <[email protected]>
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None of the checks need to know the ro/rw status as they're all not
changing the superblock. Moreover, we can access the sb flags directly
if we'd need to decide by the ro/rw status.
Reviewed-by: Liu Bo <[email protected]>
Signed-off-by: David Sterba <[email protected]>
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Added but never used.
Reviewed-by: Liu Bo <[email protected]>
Signed-off-by: David Sterba <[email protected]>
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Unused since qgroup refactoring that split data and metadata accounting,
the btrfs_qgroup_free helper.
Reviewed-by: Liu Bo <[email protected]>
Signed-off-by: David Sterba <[email protected]>
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Unused since long ago.
Reviewed-by: Liu Bo <[email protected]>
Signed-off-by: David Sterba <[email protected]>
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Unused since long ago.
Reviewed-by: Liu Bo <[email protected]>
Signed-off-by: David Sterba <[email protected]>
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write_all_supers and write_ctree_super are almost equal, the parameter
'trans' is unused so we can drop it and have just one helper.
Reviewed-by: Liu Bo <[email protected]>
Signed-off-by: David Sterba <[email protected]>
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The barriers are handled by the caller.
Reviewed-by: Liu Bo <[email protected]>
Signed-off-by: David Sterba <[email protected]>
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Never used.
Reviewed-by: Liu Bo <[email protected]>
Signed-off-by: David Sterba <[email protected]>
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Added but never needed.
Reviewed-by: Liu Bo <[email protected]>
Signed-off-by: David Sterba <[email protected]>
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Added but never used.
Reviewed-by: Liu Bo <[email protected]>
Signed-off-by: David Sterba <[email protected]>
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Never used in that function.
Reviewed-by: Liu Bo <[email protected]>
Signed-off-by: David Sterba <[email protected]>
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Change the name so it matches the naming we already use eg. for
btrfs_path.
Suggested-by: Qu Wenruo <[email protected]>
Signed-off-by: David Sterba <[email protected]>
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There was never need for RCU protection around reading nodesize or other
fairly constant filesystem data.
Signed-off-by: David Sterba <[email protected]>
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The helper name is not too helpful and is just wrapping a simple call.
Signed-off-by: David Sterba <[email protected]>
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The quota status used to be tracked as a variable, so the mutex was
needed (until "Btrfs: add a flags field to btrfs_fs_info" afcdd129e05a9).
Since the status is a bit modified atomically and we don't hold the
mutex beyond the check, we can drop it.
Signed-off-by: David Sterba <[email protected]>
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Status of quotas should be the first check in
btrfs_qgroup_account_extent and we can return immediatelly, no need to
do no-op ulist frees.
Signed-off-by: David Sterba <[email protected]>
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We can embed range_changed to the extent changeset to address following
problems:
- no need to allocate ulist dynamically, we also get rid of the GFP_NOFS
for free
- fix lack of allocation failure checking in btrfs_qgroup_reserve_data
The stack consuption where extent_changeset is used slightly increases:
before: 16
after: 16 - 8 (for pointer) + 32 (sizeof ulist) = 40
Which is bearable.
Reviewed-by: Qu Wenruo <[email protected]>
Signed-off-by: David Sterba <[email protected]>
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Make ulist_fini externally visible so the ulist API is complete.
Signed-off-by: David Sterba <[email protected]>
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Internal helper.
Signed-off-by: David Sterba <[email protected]>
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We do a readahead of the free space cache inode to speed things up but
the failure is not fatal, like in other readahead cases. Proper reads
would need to happen anyway and any errors would be caught there.
Reviewed-by: Liu Bo <[email protected]>
Signed-off-by: David Sterba <[email protected]>
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Qgroup relations are added/deleted from ioctl, we hold the high level
qgroup lock, no deadlocks or recursion from the allocation possible
here.
Signed-off-by: David Sterba <[email protected]>
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We don't need to use GFP_NOFS here as this is called from ioctls an the
only lock held is the subvol_sem, which is of a high level and protects
creation/renames/deletion and is never held in the writeout paths.
Signed-off-by: David Sterba <[email protected]>
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The qgroup config is read during mount, we do not have to use NOFS.
Signed-off-by: David Sterba <[email protected]>
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We don't need to use GFP_NOFS here as this is called from ioctls an the
only lock held is the subvol_sem, which is of a high level and protects
creation/renames/deletion and is never held in the writeout paths.
Signed-off-by: David Sterba <[email protected]>
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As 0 refers to an existing type BTRFS_ORDERED_IO_DONE, this specifies a
new type 'REGULAR' for regular IO.
Signed-off-by: Liu Bo <[email protected]>
Reviewed-by: David Sterba <[email protected]>
Signed-off-by: David Sterba <[email protected]>
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We have similar codes to create and insert extent mapping around IO path,
this merges them into a single helper.
Signed-off-by: Liu Bo <[email protected]>
Reviewed-by: David Sterba <[email protected]>
Signed-off-by: David Sterba <[email protected]>
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This uses a helper instead of open code around used byte of space_info
everywhere.
Signed-off-by: Liu Bo <[email protected]>
Reviewed-by: David Sterba <[email protected]>
Signed-off-by: David Sterba <[email protected]>
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We don't need to take the lock if the block group has not been cached.
Signed-off-by: Liu Bo <[email protected]>
Reviewed-by: David Sterba <[email protected]>
Signed-off-by: David Sterba <[email protected]>
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The original csum error message only outputs inode number, offset, check
sum and expected check sum.
However no root objectid is outputted, which sometimes makes debugging
quite painful under multi-subvolume case (including relocation).
Also the checksum output is decimal, which seldom makes sense for
users/developers and is hard to read in most time.
This patch will add root objectid, which will be %lld for rootid larger
than LAST_FREE_OBJECTID, and hex csum output for better readability.
Signed-off-by: Qu Wenruo <[email protected]>
Reviewed-by: David Sterba <[email protected]>
Signed-off-by: David Sterba <[email protected]>
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If btrfs_bio_alloc fails in submit_extent_page, submit_extent_page returns
without clearing the writeback bit of the failed page.
__extent_writepage_io, that is a caller of submit_extent_page,
does not clear the remaining writeback bit anywhere.
As a result, this will cause the hang at filemap_fdatawait_range,
because it waits the writeback bit to be cleared from the failed page.
So, we have to call end_page_writeback to clear the writeback bit.
For reproducing the hang, we inject a fault like
if (should_failtest()) { // I define should_failtest()
bio = NULL;
}
else {
bio = btrfs_bio_alloc(...);
}
in submit_extent_page.
We should also check whether page has the bit before end_page_writeback,
to avoid the conflict against the other end_page_writeback in bio_endio.
Thus, we add PageWriteback checks not only in __extent_writepage_io,
but also in write_one_eb too, because it misses the check.
Signed-off-by: Takafumi Kubota <[email protected]>
Reviewed-by: Liu Bo <[email protected]>
Cc: David Sterba <[email protected]>
Signed-off-by: David Sterba <[email protected]>
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Commit "btrfs: ulist: Add ulist_del() function" (d4b804045924d7f8)
removed some debugging code but left the structure defintions.
Reviewed-by: Qu Wenruo <[email protected]>
Reviewed-by: Liu Bo <[email protected]>
Signed-off-by: David Sterba <[email protected]>
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Since we have a helper to set page bits, let lock_delalloc_pages and
__unlock_for_delalloc use it.
Signed-off-by: Liu Bo <[email protected]>
Reviewed-by: David Sterba <[email protected]>
Signed-off-by: David Sterba <[email protected]>
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Signed-off-by: Liu Bo <[email protected]>
Reviewed-by: David Sterba <[email protected]>
[ changes to the helper separated from the following patch ]
Signed-off-by: David Sterba <[email protected]>
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This introduces a new helper which can be used to process pages bits.
Signed-off-by: Liu Bo <[email protected]>
Reviewed-by: David Sterba <[email protected]>
Signed-off-by: David Sterba <[email protected]>
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run_delalloc_nocow has used trans in two places where they don't
actually need @trans.
For btrfs_lookup_file_extent, we search for file extents without COWing
anything, and for btrfs_cross_ref_exist, the only place where we need
@trans is deferencing it in order to get running_transaction which we
could easily get from the global fs_info.
Signed-off-by: Liu Bo <[email protected]>
Reviewed-by: David Sterba <[email protected]>
Signed-off-by: David Sterba <[email protected]>
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All we need is @delayed_refs, all callers have get it ahead of calling
btrfs_find_delayed_ref_head since lock needs to be acquired firstly,
there is no reason to deference it again inside the function.
Signed-off-by: Liu Bo <[email protected]>
Reviewed-by: David Sterba <[email protected]>
Signed-off-by: David Sterba <[email protected]>
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@trans is not used at all, this removes it.
Signed-off-by: Liu Bo <[email protected]>
Reviewed-by: David Sterba <[email protected]>
Signed-off-by: David Sterba <[email protected]>
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@cached_state is no more required in __extent_writepage_io, also remove
the goto label.
Signed-off-by: Liu Bo <[email protected]>
Signed-off-by: David Sterba <[email protected]>
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Once a qgroup limit is exceeded, it's impossible to restore normal
operation to the subvolume without modifying the limit or removing
the subvolume. This is a surprising situation for many users used
to the typical workflow with quotas on other file systems where it's
possible to remove files until the used space is back under the limit.
When we go to unlink a file and start the transaction, we'll hit
the qgroup limit while trying to reserve space for the items we'll
modify while removing the file. We discussed last month how best
to handle this situation and agreed that there is no perfect solution.
The best principle-of-least-surprise solution is to handle it similarly
to how we already handle ENOSPC when unlinking, which is to allow
the operation to succeed with the expectation that it will ultimately
release space under most circumstances.
This patch modifies the transaction start path to select whether to
honor the qgroups limits. btrfs_start_transaction_fallback_global_rsv
is the only caller that skips enforcement. The reservation and tracking
still happens normally -- it just skips the enforcement step.
Signed-off-by: Jeff Mahoney <[email protected]>
Reviewed-by: Qu Wenruo <[email protected]>
Signed-off-by: David Sterba <[email protected]>
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Commit Btrfs: btrfs_page_mkwrite: Reserve space in sectorsized units"
(d0b7da88) did this, but btrfs_lookup_ordered_range expects a 'length'
rather than a 'page_end'.
Signed-off-by: Liu Bo <[email protected]>
Reviewed-by: Chandan Rajendra <[email protected]>
Signed-off-by: David Sterba <[email protected]>
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Variable 'walk' in lock_stripe_add() is not used. Remove it.
Signed-off-by: Qu Wenruo <[email protected]>
Signed-off-by: David Sterba <[email protected]>
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