- 12 Aug, 2018 3 commits
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Eric Sandeen authored
The old lock tracking infrastructure in xfs using the b_last_holder field seems to only be useful if you can get into the system with a debugger; it seems that the existing tracepoints would be the way to go these days, and this old infrastructure can be removed. Signed-off-by:
Eric Sandeen <sandeen@redhat.com> Reviewed-by:
Darrick J. Wong <darrick.wong@oracle.com> Signed-off-by:
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Andreas Gruenbacher authored
Instead of open-coding pos & (PAGE_SIZE - 1) and pos & ~PAGE_MASK, use the offset_in_page macro. Signed-off-by:
Andreas Gruenbacher <agruenba@redhat.com> Reviewed-by:
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Dave Jiang authored
This patch is the duplicate of ross's fix for ext4 for xfs. If the refcount of a page is lowered between the time that it is returned by dax_busy_page() and when the refcount is again checked in xfs_break_layouts() => ___wait_var_event(), the waiting function xfs_wait_dax_page() will never be called. This means that xfs_break_layouts() will still have 'retry' set to false, so we'll stop looping and never check the refcount of other pages in this inode. Instead, always continue looping as long as dax_layout_busy_page() gives us a page which it found with an elevated refcount. Signed-off-by:
Dave Jiang <dave.jiang@intel.com> Reviewed-by:
Jan Kara <jack@suse.cz> Reviewed-by:
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- 10 Aug, 2018 3 commits
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Darrick J. Wong authored
Rebuild the AGI header items with some help from the rmapbt. Signed-off-by:
Brian Foster <bfoster@redhat.com>
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Darrick J. Wong authored
Repair the AGFL from the rmap data. Signed-off-by:
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Darrick J. Wong authored
Regenerate the AGF from the rmap data. Signed-off-by:
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- 07 Aug, 2018 2 commits
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Brian Foster authored
Colin Ian King reports that commit 82ff27bc ("xfs: automatic dfops buffer relogging") leaves around some dead error handling code in xfs_dquot_disk_alloc(). This was discovered via Coverity scan. Since the associated commit eliminates the act of joining a buffer to a dfops, this intermediate error state is no longer possible and the error handling code can be removed. Since the caller cancels the transaction on error, which cancels the dfops, eliminate the unnecessary xfs_defer_cancel() call and error handling labels. Fixes: 82ff27bc ("xfs: automatic dfops buffer relogging") Reported-by:
Colin Ian King <colin.king@canonical.com> Signed-off-by:
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Christoph Hellwig authored
This adds ordering of the updates and makes sure we always see the if_seq update before the extent tree is modified. Signed-off-by:
Christoph Hellwig <hch@lst.de> Reviewed-by:
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- 03 Aug, 2018 18 commits
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Huang Chong authored
Fix the comment in xfs_log_reserve to avoid confusing. Signed-of-by:
Huang Chong <huang.chong@zte.com.cn> Reviewed-by:
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Darrick J. Wong authored
Skip the summary counter checks for secondary superblocks and inprogress primary superblocks because mkfs has always written those out with zeroed summary counters. Signed-off-by:
Carlos Maiolino <cmaiolino@redhat.com>
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Thomas Bianchi authored
Inside xfs_attr_shortform_list removes spaces at the beginnig of the line and replaces with tabs. Issue found by checkpatch. ERROR: code indent should use tabs where possible Signed-off-by:
Thomas Bianchi <thomas.bianchi8@gmail.com> Reviewed-by:
Bill O'Donnell <billodo@redhat.com> Reviewed-by:
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Brian Foster authored
struct xfs_defer_ops has now been reduced to a single list_head. The external dfops mechanism is unused and thus everywhere a (permanent) transaction is accessible the associated dfops structure is as well. Remove the xfs_defer_ops structure and fold the list_head into the transaction. Also remove the last remnant of external dfops in xfs_trans_dup(). Signed-off-by:
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Brian Foster authored
The AGFL fixup code conditionally defers block frees from the free list based on whether the current transaction has an associated xfs_defer_ops structure. Now that dfops is embedded in the transaction and the internal dfops is used unconditionally, this invariant is always true. Remove the now dead logic to check for ->t_dfops in xfs_alloc_fix_freelist() and unconditionally defer AGFL block frees. Signed-off-by:
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Brian Foster authored
The majority of remaining references to struct xfs_defer_ops in XFS are associated with xfs_defer_add(). At this point, there are no more external xfs_defer_ops users left. All instances of xfs_defer_ops are embedded in the transaction, which means we can safely pass the transaction down to the dfops add interface. Update xfs_defer_add() to receive the transaction as a parameter. Various subsystems implement wrappers to allocate and construct the context specific data structures for the associated deferred operation type. Update these to also carry the transaction down as needed and clean up unused dfops parameters along the way. This removes most of the remaining references to struct xfs_defer_ops throughout the code and facilitates removal of the structure. Signed-off-by:
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Brian Foster authored
The xfs_defer_ops ->dop_pending list is used to track active deferred operations once intents are logged. These items must be aborted in the event of an error. The list is populated as intents are logged and items are removed as they complete (or are aborted). Now that xfs_defer_finish() cancels on error, there is no need to ever access ->dop_pending outside of xfs_defer_finish(). The list is only ever populated after xfs_defer_finish() begins and is either completed or cancelled before it returns. Remove ->dop_pending from xfs_defer_ops and replace it with a local list in the xfs_defer_finish() path. Pass the local list to the various helpers now that it is not accessible via dfops. Note that we have to check for NULL in the abort case as the final tx roll occurs outside of the scope of the new local list (once the dfops has completed and thus drained the list). Signed-off-by:
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Brian Foster authored
The current semantics of xfs_defer_finish() require the caller to call xfs_defer_cancel() on error. This is slightly inconsistent with transaction commit error handling where a failed commit cleans up the transaction before returning. More significantly, the only requirement for exposure of ->dop_pending outside of xfs_defer_finish() is so that xfs_defer_cancel() can drain it on error. Since the only recourse of xfs_defer_finish() errors is cancellation, mirror the transaction logic and cancel remaining dfops before returning from xfs_defer_finish() with an error. Beside simplifying xfs_defer_finish() semantics, this ensures that xfs_defer_finish() always returns with an empty ->dop_pending and thus facilitates removal of the list from xfs_defer_ops. Signed-off-by:
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Brian Foster authored
The dfops code still passes around the xfs_defer_ops pointer superfluously in a few places. Clean this up wherever the transaction will suffice. Signed-off-by:
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Brian Foster authored
The dfops infrastructure ->finish_item() callback passes the transaction and dfops as separate parameters. Since dfops is always part of a transaction, the latter parameter is no longer necessary. Remove it from the various callbacks. Signed-off-by:
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Brian Foster authored
Inodes that are held across deferred operations are explicitly joined to the dfops structure to ensure appropriate relogging. While inodes are currently joined explicitly, we can detect the conditions that require relogging at dfops finish time by inspecting the transaction item list for inodes with ili_lock_flags == 0. Replace the xfs_defer_ijoin() infrastructure with such detection and automatic relogging of held inodes. This eliminates the need for the per-dfops inode list, replaced by an on-stack variant in xfs_defer_trans_roll(). Signed-off-by:
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Brian Foster authored
Buffers that are held across deferred operations are explicitly joined to the dfops structure to ensure appropriate relogging. While buffers are currently joined explicitly, we can detect the conditions that require relogging at dfops finish time by inspecting the transaction item list for held buffers. Replace the xfs_defer_bjoin() infrastructure with such detection and automatic relogging of held buffers. This eliminates the need for the per-dfops buffer list, replaced by an on-stack variant in xfs_defer_trans_roll(). Signed-off-by:
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Brian Foster authored
Log items that require relogging during deferred operations processing are explicitly joined to the associated dfops via the xfs_defer_*join() helpers. These calls imply that the associated object is "held" by the transaction such that when rolled, the item can be immediately joined to a follow up transaction. For buffers, this means the buffer remains locked and held after each roll. For inodes, this means that the inode remains locked. Failure to join a held item to the dfops structure means the associated object pins the tail of the log while dfops processing completes, because the item never relogs and is not unlocked or released until deferred processing completes. Currently, all buffers that are held in transactions (XFS_BLI_HOLD) with deferred operations are explicitly joined to the dfops. This is not the case for inodes, however, as various contexts defer operations to transactions with held inodes without explicit joins to the associated dfops (and thus not relogging). While this is not a catastrophic problem, it is not ideal. Given that we want to eventually relog such items automatically during dfops processing, start by explicitly adding these missing xfs_defer_ijoin() calls. A call is added everywhere an inode is joined to a transaction without transferring lock ownership and said transaction runs deferred operations. All xfs_defer_ijoin() calls will eventually be replaced by automatic dfops inode relogging. This patch essentially implements the behavior change that would otherwise occur due to automatic inode dfops relogging. Signed-off-by:
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Brian Foster authored
The dop_low field enables the low free space allocation mode when a previous allocation has detected difficulty allocating blocks. It has historically been part of the xfs_defer_ops structure, which means if enabled, it remains enabled across a set of transactions until the deferred operations have completed and the dfops is reset. Now that the dfops is embedded in the transaction, we can save a bit more space by using a transaction flag rather than a standalone boolean. Drop the ->dop_low field and replace it with a transaction flag that is set at the same points, carried across rolling transactions and cleared on completion of deferred operations. This essentially emulates the behavior of ->dop_low and so should not change behavior. Signed-off-by:
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Brian Foster authored
All callers pass ->t_dfops of the associated transactions. Refactor the helpers to receive the transactions and facilitate further cleanups between xfs_defer_ops and xfs_trans. Signed-off-by:
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Brian Foster authored
With no more external dfops users, there is no need for an xfs_defer_ops cancel wrapper. Signed-off-by:
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Brian Foster authored
Log intent recovery is the last user of an external (on-stack) dfops. The pattern exists because the dfops is used to collect additional deferred operations queued during the whole recovery sequence. The dfops is finished with a new transaction after intent recovery completes. We already have a mechanism to create an empty, container-like transaction to support the scrub infrastructure. We can reuse that mechanism here to drop the final user of external dfops. This facilitates folding dfops state (i.e., dop_low) into the transaction, the elimination of now unused external dfops support and also eliminates the only caller of __xfs_defer_cancel(). Replace the on-stack dfops with an empty transaction and pass it around to the various helpers that queue and finish deferred operations during intent recovery. Signed-off-by:
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Brian Foster authored
The current transaction allocation code conditionally initializes the ->t_dfops indirection pointer. Transaction commit/cancel check the validity of the pointer to determine whether to finish/cancel the internal dfops. This disallows the ability to use the internal dfops list as a temporary container (via xfs_trans_alloc_empty()). Refactor transaction allocation to always initialize ->t_dfops and check permanent reservation state on transaction commit/cancel. Signed-off-by:
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- 01 Aug, 2018 3 commits
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Darrick J. Wong authored
Before we start processing what we /think/ is a da3 node block, actually check the magic to make sure that we're looking at a node block. This way we won't blow the asserts in _node_hdr_from_disk on corrupted metadata. Signed-off-by:
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Darrick J. Wong authored
Use a local variable for the block magic number checks instead of abusing blk->magic. Signed-off-by:
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Darrick J. Wong authored
Add a predicate to decide if the log is actively in recovery and use that instead of open-coding a pagf_init check in the attr leaf verifier. Signed-off-by:
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- 31 Jul, 2018 8 commits
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Darrick J. Wong authored
Move the per-AG busy extent tree initialization to the per-ag structure initialization since we don't want online repair to leak the old tree. We only deconstruct the tree at unmount time, so this should be safe. This also enables us to eliminate the commented out initialization in the xfsprogs libxfs. Signed-off-by:
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Christoph Hellwig authored
Used the per-fork sequence counter to avoid lookups in the writeback code unless the COW fork actually changed. Signed-off-by:
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Christoph Hellwig authored
Add a simple 32-bit unsigned integer as the sequence count for modifications to the extent list in the inode fork. This will be used to optimize away extent list lookups in the writeback code. Signed-off-by:
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Darrick J. Wong authored
Make sure we never try to write the superblock with unknown feature bits set. We checked those at mount time, so if they're set now then memory is corrupt. Signed-off-by:
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Darrick J. Wong authored
Add a helper predicate to check the inode count for sanity, then use it in the superblock write verifier to inspect sb_icount. Signed-off-by:
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Bill O'Donnell authored
Current sb verifier doesn't check bounds on sb_fdblocks and sb_ifree. Add sanity checks for these parameters. Signed-off-by:
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Darrick J. Wong authored
Split the superblock verifier into the common checks, the read-time checks, and the write-time check functions. No functional changes, but we're setting up to add more write-only checks. Signed-off-by:
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Darrick J. Wong authored
As mentioned previously, the xrep_extent_list basically implements a bitmap with two functions: set and disjoint union. Rename all these functions to xfs_bitmap to shorten the name and make it more obvious what we're doing. Signed-off-by:
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- 30 Jul, 2018 3 commits
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Christoph Hellwig authored
We have a few places that already check if an inode has actual data in the COW fork to avoid work on reflink inodes that do not actually have outstanding COW blocks. There are a few more places that can avoid working if doing the same check, so add a documented helper for this condition and use it in all places where it makes sense. Signed-off-by:
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Christoph Hellwig authored
We only have a few more callers left, so seize the opportunity and kill it off. Signed-off-by:
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Christoph Hellwig authored
Streamline the code and take advantage of the fact that kmem_realloc through krealloc will be have like a normal allocation if passing in a NULL old pointer. Signed-off-by:
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