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* xfs: move bulkstat ichunk helpers to iwalk codeDarrick J. Wong2019-07-023-104/+93
| | | | | | | | Now that we've reworked the bulkstat code to use iwalk, we can move the old bulkstat ichunk helpers to xfs_iwalk.c. No functional changes here. Signed-off-by: Darrick J. Wong <darrick.wong@oracle.com> Reviewed-by: Brian Foster <bfoster@redhat.com>
* xfs: calculate inode walk prefetch more carefullyDarrick J. Wong2019-07-021-3/+45
| | | | | | | | | | | | The existing inode walk prefetch is based on the old bulkstat code, which simply allocated 4 pages worth of memory and prefetched that many inobt records, regardless of however many inodes the caller requested. 65536 inodes is a lot to prefetch (~32M on x64, ~512M on arm64) so let's scale things down a little more intelligently based on the number of inodes requested, etc. Signed-off-by: Darrick J. Wong <darrick.wong@oracle.com> Reviewed-by: Brian Foster <bfoster@redhat.com>
* xfs: convert bulkstat to new iwalk infrastructureDarrick J. Wong2019-07-025-406/+264
| | | | | | | | | | | Create a new ibulk structure incore to help us deal with bulk inode stat state tracking and then convert the bulkstat code to use the new iwalk iterator. This disentangles inode walking from bulk stat control for simpler code and enables us to isolate the formatter functions to the ioctl handling code. Signed-off-by: Darrick J. Wong <darrick.wong@oracle.com> Reviewed-by: Brian Foster <bfoster@redhat.com>
* xfs: bulkstat should copy lastip whenever userspace supplies oneDarrick J. Wong2019-07-022-14/+12
| | | | | | | | When userspace passes in a @lastip pointer we should copy the results back, even if the @ocount pointer is NULL. Signed-off-by: Darrick J. Wong <darrick.wong@oracle.com> Reviewed-by: Brian Foster <bfoster@redhat.com>
* xfs: convert quotacheck to use the new iwalk functionsDarrick J. Wong2019-07-021-43/+20
| | | | | | | | | Convert quotacheck to use the new iwalk iterator to dig through the inodes. Signed-off-by: Darrick J. Wong <darrick.wong@oracle.com> Reviewed-by: Dave Chinner <dchinner@redhat.com> Reviewed-by: Brian Foster <bfoster@redhat.com>
* xfs: create simplified inode walk functionDarrick J. Wong2019-07-028-6/+496
| | | | | | | | | Create a new iterator function to simplify walking inodes in an XFS filesystem. This new iterator will replace the existing open-coded walking that goes on in various places. Signed-off-by: Darrick J. Wong <darrick.wong@oracle.com> Reviewed-by: Brian Foster <bfoster@redhat.com>
* xfs: create iterator error codesDarrick J. Wong2019-07-026-8/+14
| | | | | | | | | | | | Currently, xfs doesn't have generic error codes defined for "stop iterating"; we just reuse the XFS_BTREE_QUERY_* return values. This looks a little weird if we're not actually iterating a btree index. Before we start adding more iterators, we should create general XFS_ITER_{CONTINUE,ABORT} return values and define the XFS_BTREE_QUERY_* ones from that. Signed-off-by: Darrick J. Wong <darrick.wong@oracle.com> Reviewed-by: Brian Foster <bfoster@redhat.com>
* xfs: remove XFS_TRANS_NOFSChristoph Hellwig2019-06-306-23/+41
| | | | | | | | | | Instead of a magic flag for xfs_trans_alloc, just ensure all callers that can't relclaim through the file system use memalloc_nofs_save to set the per-task nofs flag. 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>
* xfs: simplify xfs_ioend_can_mergeChristoph Hellwig2019-06-301-12/+2
| | | | | | | | | Compare the block layer status directly instead of converting it to an errno first. 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>
* xfs: allow merging ioends over append boundariesChristoph Hellwig2019-06-301-7/+21
| | | | | | | | | | | | There is no real problem merging ioends that go beyond i_size into an ioend that doesn't. We just need to move the append transaction to the base ioend. Also use the opportunity to use a real error code instead of the magic 1 to cancel the transactions, and write a comment explaining the scheme. 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>
* xfs: fix a comment typo in xfs_submit_ioendChristoph Hellwig2019-06-301-1/+1
| | | | | | | | The fail argument is long gone, update the comment. 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>
* xfs: remove the unused xfs_count_page_state declarationChristoph Hellwig2019-06-301-1/+0
| | | | | | 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>
* xfs: fix iclog allocation sizeChristoph Hellwig2019-06-281-1/+2
| | | | | | | | | | | Properly allocate the space for the bio_vecs instead of just one byte per bio_vec. Fixes: 79b54d9bfcdcd0a ("xfs: use bios directly to write log buffers") Reported-by: syzbot+b75afdbe271a0d7ac4f6@syzkaller.appspotmail.com 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>
* xfs: remove unused header filesEric Sandeen2019-06-28113-570/+0
| | | | | | | | | | | | | | | | There are many, many xfs header files which are included but unneeded (or included twice) in the xfs code, so remove them. nb: xfs_linux.h includes about 9 headers for everyone, so those explicit includes get removed by this. I'm not sure what the preference is, but if we wanted explicit includes everywhere, a followup patch could remove those xfs_*.h includes from xfs_linux.h and move them into the files that need them. Or it could be left as-is. Signed-off-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>
* xfs: implement cgroup aware writebackChristoph Hellwig2019-06-282-1/+5
| | | | | | | | | | Link every newly allocated writeback bio to cgroup pointed to by the writeback control structure, and charge every byte written back to it. Tested-by: Stefan Priebe - Profihost AG <s.priebe@profihost.ag> 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>
* xfs: simplify xfs_chain_bioChristoph Hellwig2019-06-281-18/+17
| | | | | | | | | | Move setting up operation and write hint to xfs_alloc_ioend, and then just copy over all needed information from the previous bio in xfs_chain_bio and stop passing various parameters to it. 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>
* xfs: account for log space when formatting new AGsDarrick J. Wong2019-06-281-0/+67
| | | | | | | | | | When we're writing out a fresh new AG, make sure that we don't list an internal log as free and that we create the rmap for the region. growfs never does this, but we will need it when we hook up mkfs. Signed-off-by: Darrick J. Wong <darrick.wong@oracle.com> Reviewed-by: Allison Collins <allison.henderson@oracle.com> Reviewed-by: Christoph Hellwig <hch@lst.de>
* xfs: refactor free space btree record initializationDarrick J. Wong2019-06-281-11/+16
| | | | | | | | | | Refactor the code that populates the free space btrees of a new AG so that we can avoid code duplication once things start getting complicated. Signed-off-by: Darrick J. Wong <darrick.wong@oracle.com> Reviewed-by: Allison Collins <allison.henderson@oracle.com> Reviewed-by: Christoph Hellwig <hch@lst.de>
* xfs: always update params on small allocationBrian Foster2019-06-281-2/+2
| | | | | | | | | | | | | | xfs_alloc_ag_vextent_small() doesn't update the output parameters in the event of an AGFL allocation. Instead, it updates the xfs_alloc_arg structure directly to complete the allocation. Update both args and the output params to provide consistent behavior for future callers. Signed-off-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>
* xfs: skip small alloc cntbt logic on NULL cursorBrian Foster2019-06-281-2/+9
| | | | | | | | | | | | | | | | | | | | | The small allocation helper is implemented in a way that is fairly tightly integrated to the existing allocation algorithms. It expects a cntbt cursor beyond the end of the tree, attempts to locate the last record in the tree and only attempts an AGFL allocation if the cntbt is empty. The upcoming generic algorithm doesn't rely on the cntbt processing of this function. It will only call this function when the cntbt doesn't have a big enough extent or is empty and thus AGFL allocation is the only remaining option. Tweak xfs_alloc_ag_vextent_small() to handle a NULL cntbt cursor and skip the cntbt logic. This facilitates use by the existing allocation code and new code that only requires an AGFL allocation attempt. Signed-off-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>
* xfs: move small allocation helperBrian Foster2019-06-281-96/+94
| | | | | | | | | | Move the small allocation helper further up in the file to avoid the need for a function declaration. The remaining declarations will be removed by followup patches. No functional changes. 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>
* xfs: clean up small allocation helperBrian Foster2019-06-281-72/+60
| | | | | | | | | | xfs_alloc_ag_vextent_small() is kind of a mess. Clean it up in preparation for future changes. No functional changes. Signed-off-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>
* xfs: merge xfs_trans_bmap.c into xfs_bmap_item.cChristoph Hellwig2019-06-284-229/+198
| | | | | | | | | Keep all bmap item related code together. Signed-off-by: Christoph Hellwig <hch@lst.de> Reviewed-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>
* xfs: merge xfs_trans_rmap.c into xfs_rmap_item.cChristoph Hellwig2019-06-284-259/+229
| | | | | | | | | Keep all rmap item related code together in one file. Signed-off-by: Christoph Hellwig <hch@lst.de> Reviewed-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>
* xfs: merge xfs_trans_refcount.c into xfs_refcount_item.cChristoph Hellwig2019-06-284-237/+207
| | | | | | | | | Keep all the refcount item related code together in one file. Signed-off-by: Christoph Hellwig <hch@lst.de> Reviewed-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>
* xfs: merge xfs_trans_extfree.c into xfs_extfree_item.cChristoph Hellwig2019-06-284-270/+244
| | | | | | | | | Keep all the extree item related code together in one file. Signed-off-by: Christoph Hellwig <hch@lst.de> Reviewed-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>
* xfs: merge xfs_bud_init into xfs_trans_get_budChristoph Hellwig2019-06-283-26/+6
| | | | | | | | | There is no good reason to keep these two functions separate. Signed-off-by: Christoph Hellwig <hch@lst.de> Reviewed-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>
* xfs: merge xfs_rud_init into xfs_trans_get_rudChristoph Hellwig2019-06-283-22/+6
| | | | | | | | | There is no good reason to keep these two functions separate. Signed-off-by: Christoph Hellwig <hch@lst.de> Reviewed-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>
* xfs: merge xfs_cud_init into xfs_trans_get_cudChristoph Hellwig2019-06-283-26/+6
| | | | | | | | | There is no good reason to keep these two functions separate. Signed-off-by: Christoph Hellwig <hch@lst.de> Reviewed-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>
* xfs: merge xfs_efd_init into xfs_trans_get_efdChristoph Hellwig2019-06-283-40/+15
| | | | | | | | | There is no good reason to keep these two functions separate. Signed-off-by: Christoph Hellwig <hch@lst.de> Reviewed-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>
* xfs: remove a pointless comment duplicated above all xfs_item_ops instancesChristoph Hellwig2019-06-288-39/+0
| | | | | | | Signed-off-by: Christoph Hellwig <hch@lst.de> Reviewed-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>
* xfs: use a list_head for iclog callbacksChristoph Hellwig2019-06-284-69/+39
| | | | | | | | | | Replace the hand grown linked list handling and cil context attachment with the standard list_head structure. Signed-off-by: Christoph Hellwig <hch@lst.de> Reviewed-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>
* xfs: remove the xfs_log_item_t typedefChristoph Hellwig2019-06-289-48/+48
| | | | | | | Signed-off-by: Christoph Hellwig <hch@lst.de> Reviewed-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>
* xfs: don't cast inode_log_items to get the log_itemChristoph Hellwig2019-06-281-2/+2
| | | | | | | | | | The cast is not type safe, and we can just dereference the first member instead to start with. Signed-off-by: Christoph Hellwig <hch@lst.de> Reviewed-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>
* xfs: add a flag to release log items on commitChristoph Hellwig2019-06-287-121/+18
| | | | | | | | | | | We have various items that are released from ->iop_comitting. Add a flag to just call ->iop_release from the commit path to avoid tons of boilerplate code. Signed-off-by: Christoph Hellwig <hch@lst.de> Reviewed-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>
* xfs: split iop_unlockChristoph Hellwig2019-06-2813-73/+67
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | The iop_unlock method is called when comitting or cancelling a transaction. In the latter case, the transaction may or may not be aborted. While there is no known problem with the current code in practice, this implementation is limited in that any log item implementation that might want to differentiate between a commit and a cancellation must rely on the aborted state. The aborted bit is only set when the cancelled transaction is dirty, however. This means that there is no way to distinguish between a commit and a clean transaction cancellation. For example, intent log items currently rely on this distinction. The log item is either transferred to the CIL on commit or released on transaction cancel. There is currently no possibility for a clean intent log item in a transaction, but if that state is ever introduced a cancel of such a transaction will immediately result in memory leaks of the associated log item(s). This is an interface deficiency and landmine. To clean this up, replace the iop_unlock method with an iop_release method that is specific to transaction cancel. The existing iop_committing method occurs at the same time as iop_unlock in the commit path and there is no need for two separate callbacks here. Overload the iop_committing method with the current commit time iop_unlock implementations to eliminate the need for the latter and further simplify the interface. Signed-off-by: Christoph Hellwig <hch@lst.de> Reviewed-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>
* xfs: don't use xfs_trans_free_items in the commit pathChristoph Hellwig2019-06-284-12/+14
| | | | | | | | | | | | | While commiting items looks very similar to freeing them on error it is a different operation, and they will diverge a bit soon. Split out the commit case from xfs_trans_free_items, inline it into xfs_log_commit_cil and give it a separate trace point. Signed-off-by: Christoph Hellwig <hch@lst.de> Reviewed-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>
* xfs: remove the dummy iop_push implementation for inode creation itemsChristoph Hellwig2019-06-281-11/+0
| | | | | | | | | This method should never be called, so don't waste code on it. Signed-off-by: Christoph Hellwig <hch@lst.de> Reviewed-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>
* xfs: don't require log items to implement optional methodsChristoph Hellwig2019-06-2810-557/+25
| | | | | | | | | Just check if they are present first. Signed-off-by: Christoph Hellwig <hch@lst.de> Reviewed-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>
* xfs: stop using XFS_LI_ABORTED as a parameter flagChristoph Hellwig2019-06-285-19/+16
| | | | | | | | | | Just pass a straight bool aborted instead of abusing XFS_LI_ABORTED as a flag in function parameters. Signed-off-by: Christoph Hellwig <hch@lst.de> Reviewed-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>
* xfs: fix a trivial comment typo in xfs_trans_committed_bulkChristoph Hellwig2019-06-281-1/+1
| | | | | | | Signed-off-by: Christoph Hellwig <hch@lst.de> Reviewed-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>
* xfs: add struct xfs_mount pointer to struct xfs_bufChristoph Hellwig2019-06-2826-88/+85
| | | | | | | | | We need to derive the mount pointer from a buffer in a lot of place. Add a direct pointer to short cut the pointer chasing. 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>
* xfs: remove the b_io_length field in struct xfs_bufChristoph Hellwig2019-06-283-9/+6
| | | | | | | | | This field is now always idential to b_length. Signed-off-by: Christoph Hellwig <hch@lst.de> Reviewed-by: Dave Chinner <dchinner@redhat.com> Reviewed-by: Darrick J. Wong <darrick.wong@oracle.com> Signed-off-by: Darrick J. Wong <darrick.wong@oracle.com>
* xfs: properly type the b_log_item field in struct xfs_bufChristoph Hellwig2019-06-281-1/+1
| | | | | | | | | | Now that the log code doesn't abuse this field any more we can declare it as a struct xfs_buf_log_item pointer. Signed-off-by: Christoph Hellwig <hch@lst.de> Reviewed-by: Dave Chinner <dchinner@redhat.com> Reviewed-by: Darrick J. Wong <darrick.wong@oracle.com> Signed-off-by: Darrick J. Wong <darrick.wong@oracle.com>
* xfs: remove unused buffer cache APIsChristoph Hellwig2019-06-282-108/+2
| | | | | | | | | | Now that the log code uses bios directly we can drop various special cases in the buffer cache code. Signed-off-by: Christoph Hellwig <hch@lst.de> Reviewed-by: Dave Chinner <dchinner@redhat.com> Reviewed-by: Darrick J. Wong <darrick.wong@oracle.com> Signed-off-by: Darrick J. Wong <darrick.wong@oracle.com>
* xfs: stop using bp naming for log recovery buffersChristoph Hellwig2019-06-281-99/+102
| | | | | | | | | | | Now that we don't use struct xfs_buf to hold log recovery buffer rename the related functions and variables to just talk of a buffer instead of using the bp name that we usually use for xfs_buf related functionality. Signed-off-by: Christoph Hellwig <hch@lst.de> Reviewed-by: Dave Chinner <dchinner@redhat.com> Reviewed-by: Darrick J. Wong <darrick.wong@oracle.com> Signed-off-by: Darrick J. Wong <darrick.wong@oracle.com>
* xfs: use bios directly to read and write the log recovery buffersChristoph Hellwig2019-06-284-157/+149
| | | | | | | | | | | The xfs_buf structure is basically used as a glorified container for a memory allocation in the log recovery code. Replace it with a call to kmem_alloc_large and a simple abstraction to read into or write from it synchronously using chained bios. 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>
* xfs: return an offset instead of a pointer from xlog_alignChristoph Hellwig2019-06-281-11/+5
| | | | | | | | | This simplifies both the helper and the callers. We lost a bit of size sanity checking, but that is already covered by KASAN if needed. 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>
* xfs: move the log ioend workqueue to struct xlogChristoph Hellwig2019-06-284-13/+13
| | | | | | | | | | Move the workqueue used for log I/O completions from struct xfs_mount to struct xlog to keep it self contained in the log code. Signed-off-by: Christoph Hellwig <hch@lst.de> Reviewed-by: Darrick J. Wong <darrick.wong@oracle.com> [darrick: destroy the log workqueue after ensuring log ios are done] Signed-off-by: Darrick J. Wong <darrick.wong@oracle.com>
* xfs: use bios directly to write log buffersChristoph Hellwig2019-06-282-130/+118
| | | | | | | | | | | | | | | | | | Currently the XFS logging code uses the xfs_buf structure and associated APIs to write the log buffers to disk. This requires various special cases in the log code and is generally not very optimal. Instead of using a buffer just allocate a kmem_alloc_larger region for each log buffer, and use a bio and bio_vec array embedded in the iclog structure to write the buffer to disk. This also allows for using the bio split and chaining case to deal with the case of a log buffer wrapping around the end of the log. Signed-off-by: Christoph Hellwig <hch@lst.de> Reviewed-by: Darrick J. Wong <darrick.wong@oracle.com> [darrick: don't split if/else with an #endif] Signed-off-by: Darrick J. Wong <darrick.wong@oracle.com>
generated by cgit v1.2.3 (git 2.25.1) at 2024-08-18 19:01:32 +0000