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* Merge branch 'for-linus' of git://oss.sgi.com/xfs/xfsLinus Torvalds2011-10-2847-2324/+2033
|\ | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | * 'for-linus' of git://oss.sgi.com/xfs/xfs: (69 commits) xfs: add AIL pushing tracepoints xfs: put in missed fix for merge problem xfs: do not flush data workqueues in xfs_flush_buftarg xfs: remove XFS_bflush xfs: remove xfs_buf_target_name xfs: use xfs_ioerror_alert in xfs_buf_iodone_callbacks xfs: clean up xfs_ioerror_alert xfs: clean up buffer allocation xfs: remove buffers from the delwri list in xfs_buf_stale xfs: remove XFS_BUF_STALE and XFS_BUF_SUPER_STALE xfs: remove XFS_BUF_SET_VTYPE and XFS_BUF_SET_VTYPE_REF xfs: remove XFS_BUF_FINISH_IOWAIT xfs: remove xfs_get_buftarg_list xfs: fix buffer flushing during unmount xfs: optimize fsync on directories xfs: reduce the number of log forces from tail pushing xfs: Don't allocate new buffers on every call to _xfs_buf_find xfs: simplify xfs_trans_ijoin* again xfs: unlock the inode before log force in xfs_change_file_space xfs: unlock the inode before log force in xfs_fs_nfs_commit_metadata ...
| * xfs: add AIL pushing tracepointsChristoph Hellwig2011-10-182-0/+45
| | | | | | | | | | | | Signed-off-by: Christoph Hellwig <hch@lst.de> Reviewed-by: Dave Chinner <dchinner@redhat.com> Signed-off-by: Alex Elder <aelder@sgi.com>
| * xfs: put in missed fix for merge problemAlex Elder2011-10-181-1/+1
| | | | | | | | | | | | | | | | | | | | I intended to do this as part of fixing part of the conflict with the merge with Linus' tree, but evidently it didn't get included in the commit. Signed-off-by: Alex Elder <aelder@sgi.com> Reviewed-by: Christoph Hellwig <hch@lst.de>
| * Merge branch 'master' of ↵Alex Elder2011-10-178-62/+69
| |\ | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | git://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux Resolved conflicts: fs/xfs/xfs_trans_priv.h: - deleted struct xfs_ail field xa_flags - kept field xa_log_flush in struct xfs_ail fs/xfs/xfs_trans_ail.c: - in xfsaild_push(), in XFS_ITEM_PUSHBUF case, replaced "flush_log = 1" with "ailp->xa_log_flush++" Signed-off-by: Alex Elder <aelder@sgi.com>
| * | xfs: do not flush data workqueues in xfs_flush_buftargChristoph Hellwig2011-10-121-10/+1
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | When we call xfs_flush_buftarg (generally from sync or umount) it already is too late to flush the data workqueues, as I/O completion is signalled for them and we are thus already done with the data we would flush here. There are places where flushing them might be useful, but the current sync interface doesn't give us that opportunity. Signed-off-by: Christoph Hellwig <hch@lst.de> Reviewed-by: Dave Chinner <dchinner@redhat.com> Signed-off-by: Alex Elder <aelder@sgi.com>
| * | xfs: remove XFS_bflushChristoph Hellwig2011-10-126-8/+6
| | | | | | | | | | | | | | | | | | | | | | | | Signed-off-by: Christoph Hellwig <hch@lst.de> Reviewed-by: Dave Chinner <dchinner@redhat.com> Signed-off-by: Alex Elder <aelder@sgi.com>
| * | xfs: remove xfs_buf_target_nameChristoph Hellwig2011-10-122-10/+5
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | The calling convention that returns a pointer to a static buffer is fairly nasty, so just opencode it in the only caller that is left. Signed-off-by: Christoph Hellwig <hch@lst.de> Reviewed-by: Dave Chinner <dchinner@redhat.com> Signed-off-by: Alex Elder <aelder@sgi.com>
| * | xfs: use xfs_ioerror_alert in xfs_buf_iodone_callbacksChristoph Hellwig2011-10-121-3/+1
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Use xfs_ioerror_alert instead of opencoding a very similar error message. Signed-off-by: Christoph Hellwig <hch@lst.de> Reviewed-by: Dave Chinner <dchinner@redhat.com> Signed-off-by: Alex Elder <aelder@sgi.com>
| * | xfs: clean up xfs_ioerror_alertChristoph Hellwig2011-10-129-59/+37
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Instead of passing the block number and mount structure explicitly get them off the bp and fix make the argument order more natural. Also move it to xfs_buf.c and stop printing the device name given that we already get the fs name as part of xfs_alert, and we know what device is operates on because of the caller that gets printed, finally rename it to xfs_buf_ioerror_alert and pass __func__ as argument where it makes sense. Signed-off-by: Christoph Hellwig <hch@lst.de> Reviewed-by: Dave Chinner <dchinner@redhat.com> Signed-off-by: Alex Elder <aelder@sgi.com>
| * | xfs: clean up buffer allocationChristoph Hellwig2011-10-123-34/+21
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Change _xfs_buf_initialize to allocate the buffer directly and rename it to xfs_buf_alloc now that is the only buffer allocation routine. Also remove the xfs_buf_deallocate wrapper around the kmem_zone_free calls for buffers. Signed-off-by: Christoph Hellwig <hch@lst.de> Reviewed-by: Dave Chinner <dchinner@redhat.com> Signed-off-by: Alex Elder <aelder@sgi.com>
| * | xfs: remove buffers from the delwri list in xfs_buf_staleChristoph Hellwig2011-10-125-9/+1
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | For each call to xfs_buf_stale we call xfs_buf_delwri_dequeue either directly before or after it, or are guaranteed by the surrounding conditionals that we are never called on delwri buffers. Simply this situation by moving the call to xfs_buf_delwri_dequeue into xfs_buf_stale. Signed-off-by: Christoph Hellwig <hch@lst.de> Reviewed-by: Dave Chinner <dchinner@redhat.com> Signed-off-by: Alex Elder <aelder@sgi.com>
| * | xfs: remove XFS_BUF_STALE and XFS_BUF_SUPER_STALEChristoph Hellwig2011-10-129-21/+22
| | | | | | | | | | | | | | | | | | | | | | | | Signed-off-by: Christoph Hellwig <hch@lst.de> Reviewed-by: Dave Chinner <dchinner@redhat.com> Signed-off-by: Alex Elder <aelder@sgi.com>
| * | xfs: remove XFS_BUF_SET_VTYPE and XFS_BUF_SET_VTYPE_REFChristoph Hellwig2011-10-127-27/+13
| | | | | | | | | | | | | | | | | | | | | | | | Signed-off-by: Christoph Hellwig <hch@lst.de> Reviewed-by: Dave Chinner <dchinner@redhat.com> Signed-off-by: Alex Elder <aelder@sgi.com>
| * | xfs: remove XFS_BUF_FINISH_IOWAITChristoph Hellwig2011-10-122-3/+1
| | | | | | | | | | | | | | | | | | | | | | | | Signed-off-by: Christoph Hellwig <hch@lst.de> Reviewed-by: Dave Chinner <dchinner@redhat.com> Signed-off-by: Alex Elder <aelder@sgi.com>
| * | xfs: remove xfs_get_buftarg_listChristoph Hellwig2011-10-122-12/+0
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | The code is unused and under a config option that doesn't exist, remove it. Signed-off-by: Christoph Hellwig <hch@lst.de> Reviewed-by: Dave Chinner <dchinner@redhat.com> Signed-off-by: Alex Elder <aelder@sgi.com>
| * | xfs: fix buffer flushing during unmountChristoph Hellwig2011-10-122-20/+10
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | The code to flush buffers in the umount code is a bit iffy: we first flush all delwri buffers out, but then might be able to queue up a new one when logging the sb counts. On a normal shutdown that one would get flushed out when doing the synchronous superblock write in xfs_unmountfs_writesb, but we skip that one if the filesystem has been shut down. Fix this by moving the delwri list flushing until just before unmounting the log, and while we're at it also remove the superflous delwri list and buffer lru flusing for the rt and log device that can never have cached or delwri buffers. Signed-off-by: Christoph Hellwig <hch@lst.de> Reported-by: Amit Sahrawat <amit.sahrawat83@gmail.com> Tested-by: Amit Sahrawat <amit.sahrawat83@gmail.com> Signed-off-by: Alex Elder <aelder@sgi.com>
| * | xfs: optimize fsync on directoriesChristoph Hellwig2011-10-122-1/+31
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Directories are only updated transactionally, which means fsync only needs to flush the log the inode is currently dirty, but not bother with checking for dirty data, non-transactional updates, and most importanly doesn't have to flush disk caches except as part of a transaction commit. While the first two optimizations can't easily be measured, the latter actually makes a difference when doing lots of fsync that do not actually have to commit the inode, e.g. because an earlier fsync already pushed the log far enough. The new xfs_dir_fsync is identical to xfs_nfs_commit_metadata except for the prototype, but I'm not sure creating a common helper for the two is worth it given how simple the functions are. Signed-off-by: Christoph Hellwig <hch@lst.de> Signed-off-by: Alex Elder <aelder@sgi.com>
| * | xfs: reduce the number of log forces from tail pushingDave Chinner2011-10-122-13/+21
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | The AIL push code will issue a log force on ever single push loop that it exits and has encountered pinned items. It doesn't rescan these pinned items until it revisits the AIL from the start. Hence we only need to force the log once per walk from the start of the AIL to the target LSN. This results in numbers like this: xs_push_ail_flush..... 1456 xs_log_force......... 1485 For an 8-way 50M inode create workload - almost all the log forces are coming from the AIL pushing code. Reduce the number of log forces by only forcing the log if the previous walk found pinned buffers. This reduces the numbers to: xs_push_ail_flush..... 665 xs_log_force......... 682 For the same test. Signed-off-by: Dave Chinner <dchinner@redhat.com> Reviewed-by: Christoph Hellwig <hch@lst.de> Signed-off-by: Alex Elder <aelder@sgi.com>
| * | xfs: Don't allocate new buffers on every call to _xfs_buf_findDave Chinner2011-10-121-20/+28
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Stats show that for an 8-way unlink @ ~80,000 unlinks/s we are doing ~1 million cache hit lookups to ~3000 buffer creates. That's almost 3 orders of magnitude more cahce hits than misses, so optimising for cache hits is quite important. In the cache hit case, we do not need to allocate a new buffer in case of a cache miss, so we are effectively hitting the allocator for no good reason for vast the majority of calls to _xfs_buf_find. 8-way create workloads are showing similar cache hit/miss ratios. The result is profiles that look like this: samples pcnt function DSO _______ _____ _______________________________ _________________ 1036.00 10.0% _xfs_buf_find [kernel.kallsyms] 582.00 5.6% kmem_cache_alloc [kernel.kallsyms] 519.00 5.0% __memcpy [kernel.kallsyms] 468.00 4.5% __ticket_spin_lock [kernel.kallsyms] 388.00 3.7% kmem_cache_free [kernel.kallsyms] 331.00 3.2% xfs_log_commit_cil [kernel.kallsyms] Further, there is a fair bit of work involved in initialising a new buffer once a cache miss has occurred and we currently do that under the rbtree spinlock. That increases spinlock hold time on what are heavily used trees. To fix this, remove the initialisation of the buffer from _xfs_buf_find() and only allocate the new buffer once we've had a cache miss. Initialise the buffer immediately after allocating it in xfs_buf_get, too, so that is it ready for insert if we get another cache miss after allocation. This minimises lock hold time and avoids unnecessary allocator churn. The resulting profiles look like: samples pcnt function DSO _______ _____ ___________________________ _________________ 8111.00 9.1% _xfs_buf_find [kernel.kallsyms] 4380.00 4.9% __memcpy [kernel.kallsyms] 4341.00 4.8% __ticket_spin_lock [kernel.kallsyms] 3401.00 3.8% kmem_cache_alloc [kernel.kallsyms] 2856.00 3.2% xfs_log_commit_cil [kernel.kallsyms] 2625.00 2.9% __kmalloc [kernel.kallsyms] 2380.00 2.7% kfree [kernel.kallsyms] 2016.00 2.3% kmem_cache_free [kernel.kallsyms] Showing a significant reduction in time spent doing allocation and freeing from slabs (kmem_cache_alloc and kmem_cache_free). Signed-off-by: Dave Chinner <dchinner@redhat.com> Reviewed-by: Christoph Hellwig <hch@lst.de> Signed-off-by: Alex Elder <aelder@sgi.com>
| * | xfs: simplify xfs_trans_ijoin* againChristoph Hellwig2011-10-1218-83/+65
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | There is no reason to keep a reference to the inode even if we unlock it during transaction commit because we never drop a reference between the ijoin and commit. Also use this fact to merge xfs_trans_ijoin_ref back into xfs_trans_ijoin - the third argument decides if an unlock is needed now. I'm actually starting to wonder if allowing inodes to be unlocked at transaction commit really is worth the effort. The only real benefit is that they can be unlocked earlier when commiting a synchronous transactions, but that could be solved by doing the log force manually after the unlock, too. Signed-off-by: Christoph Hellwig <hch@lst.de> Signed-off-by: Alex Elder <aelder@sgi.com>
| * | xfs: unlock the inode before log force in xfs_change_file_spaceChristoph Hellwig2011-10-121-8/+2
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Let the transaction commit unlock the inode before it potentially causes a synchronous log force. Signed-off-by: Christoph Hellwig <hch@lst.de> Reviewed-by: Dave Chinner <dchinner@redhat.com> Signed-off-by: Alex Elder <aelder@sgi.com>
| * | xfs: unlock the inode before log force in xfs_fs_nfs_commit_metadataChristoph Hellwig2011-10-121-6/+6
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Only read the LSN we need to push to with the ilock held, and then release it before we do the log force to improve concurrency. Signed-off-by: Christoph Hellwig <hch@lst.de> Reviewed-by: Dave Chinner <dchinner@redhat.com> Signed-off-by: Alex Elder <aelder@sgi.com>
| * | xfs: unlock the inode before log force in xfs_fsyncChristoph Hellwig2011-10-123-18/+13
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Only read the LSN we need to push to with the ilock held, and then release it before we do the log force to improve concurrency. This also removes the only direct caller of _xfs_trans_commit, thus allowing it to be merged into the plain xfs_trans_commit again. Signed-off-by: Christoph Hellwig <hch@lst.de> Signed-off-by: Alex Elder <aelder@sgi.com>
| * | xfs: XFS_TRANS_SWAPEXT is not a valid flag for xfs_trans_commitChristoph Hellwig2011-10-121-1/+1
| | | | | | | | | | | | | | | | | | | | | | | | | | | XFS_TRANS_SWAPEXT is a transaction type, not a flag for xfs_trans_commit, so don't pass it in xfs_swap_extents. Signed-off-by: Christoph Hellwig <hch@lst.de> Signed-off-by: Alex Elder <aelder@sgi.com>
| * | xfs: fix possible overflow in xfs_ioc_trim()Lukas Czerner2011-10-121-10/+10
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | In xfs_ioc_trim it is possible that computing the last allocation group to discard might overflow for big start & len values, because the result might be bigger then xfs_agnumber_t which is 32 bit long. Fix this by not allowing the start and end block of the range to be beyond the end of the file system. Note that if the start is beyond the end of the file system we have to return -EINVAL, but in the "end" case we have to truncate it to the fs size. Also introduce "end" variable, rather than using start+len which which might be more confusing to get right as this bug shows. Signed-off-by: Lukas Czerner <lczerner@redhat.com> Reviewed-by: Christoph Hellwig <hch@lst.de> Signed-off-by: Alex Elder <aelder@sgi.com>
| * | xfs: cleanup xfs_bmap.hChristoph Hellwig2011-10-121-192/+33
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Convert all function prototypes to the short form used elsewhere, and remove duplicates of comments already placed at the function body. Signed-off-by: Christoph Hellwig <hch@lst.de> Signed-off-by: Alex Elder <aelder@sgi.com>
| * | xfs: dont ignore error code from xfs_bmbt_updateChristoph Hellwig2011-10-121-2/+3
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Fix a case in xfs_bmap_add_extent_unwritten_real where we aren't passing the returned error on. Signed-off-by: Christoph Hellwig <hch@lst.de> Signed-off-by: Alex Elder <aelder@sgi.com>
| * | xfs: pass bmalloca to xfs_bmap_add_extent_hole_realChristoph Hellwig2011-10-121-83/+78
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | All the parameters passed to xfs_bmap_add_extent_hole_real() are in the xfs_bmalloca structure now. Just pass the bmalloca parameter to the function instead of 8 separate parameters. Signed-off-by: Christoph Hellwig <hch@lst.de> Signed-off-by: Alex Elder <aelder@sgi.com>
| * | xfs: pass bmalloca to xfs_bmap_add_extent_delay_realChristoph Hellwig2011-10-121-161/+171
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | All the parameters passed to xfs_bmap_add_extent_delay_real() are in the xfs_bmalloca structure now. Just pass the bmalloca parameter to the function instead of 8 separate parameters. Signed-off-by: Christoph Hellwig <hch@lst.de> Signed-off-by: Alex Elder <aelder@sgi.com>
| * | xfs: move logflags into bmallocaChristoph Hellwig2011-10-122-26/+23
| | | | | | | | | | | | | | | | | | | | | Signed-off-by: Christoph Hellwig <hch@lst.de> Signed-off-by: Alex Elder <aelder@sgi.com>
| * | xfs: move lastx and nallocs into bmallocaDave Chinner2011-10-122-26/+23
| | | | | | | | | | | | | | | | | | | | | | | | Signed-off-by: Dave Chinner <dchinner@redhat.com> Signed-off-by: Christoph Hellwig <hch@lst.de> Signed-off-by: Alex Elder <aelder@sgi.com>
| * | xfs: move btree cursor into bmallocaDave Chinner2011-10-122-30/+28
| | | | | | | | | | | | | | | | | | | | | | | | Signed-off-by: Dave Chinner <dchinner@redhat.com> Signed-off-by: Christoph Hellwig <hch@lst.de> Signed-off-by: Alex Elder <aelder@sgi.com>
| * | xfs: do not keep local copies of allocation ranges in xfs_bmapi_allocateDave Chinner2011-10-121-29/+14
| | | | | | | | | | | | | | | | | | | | | | | | Signed-off-by: Dave Chinner <dchinner@redhat.com> Signed-off-by: Christoph Hellwig <hch@lst.de> Signed-off-by: Alex Elder <aelder@sgi.com>
| * | xfs: rename allocation range fields in struct xfs_bmallocaDave Chinner2011-10-123-73/+75
| | | | | | | | | | | | | | | | | | | | | | | | Signed-off-by: Dave Chinner <dchinner@redhat.com> Signed-off-by: Christoph Hellwig <hch@lst.de> Signed-off-by: Alex Elder <aelder@sgi.com>
| * | xfs: move firstblock and bmap freelist cursor into bmalloca structureDave Chinner2011-10-123-50/+48
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Rather than passing the firstblock and freelist structure around, embed it into the bmalloca structure and remove it from the function parameters. This also enables the minleft parameter to be set only once in xfs_bmapi_write(), and the freelist cursor directly queried in xfs_bmapi_allocate to clear it when the lowspace algorithm is activated. Signed-off-by: Dave Chinner <dchinner@redhat.com> Signed-off-by: Christoph Hellwig <hch@lst.de> Signed-off-by: Alex Elder <aelder@sgi.com>
| * | xfs: move extent records into bmalloca structureDave Chinner2011-10-122-50/+47
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Rather that putting extent records on the stack and then pointing to them in the bmalloca structure which is in the same stack frame, put the extent records directly in the bmalloca structure. This reduces the number of args that need to be passed around. Signed-off-by: Dave Chinner <dchinner@redhat.com> Signed-off-by: Christoph Hellwig <hch@lst.de> Signed-off-by: Alex Elder <aelder@sgi.com>
| * | xfs: pass bmalloca structure to xfs_bmap_isaeofDave Chinner2011-10-121-11/+11
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | All the variables xfs_bmap_isaeof() is passed are contained within the xfs_bmalloca structure. Pass that instead. Signed-off-by: Dave Chinner <dchinner@redhat.com> Signed-off-by: Christoph Hellwig <hch@lst.de> Signed-off-by: Alex Elder <aelder@sgi.com>
| * | xfs: remove xfs_bmap_add_extentChristoph Hellwig2011-10-121-243/+173
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | There is no real need to the xfs_bmap_add_extent, as the callers know what kind of extents they need to it. Removing it means duplicating the extents to btree conversion logic in three places, but overall it's still much simpler code and quite a bit less code. Signed-off-by: Christoph Hellwig <hch@lst.de> Signed-off-by: Alex Elder <aelder@sgi.com>
| * | xfs: introduce xfs_bmap_last_extentChristoph Hellwig2011-10-121-121/+105
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Add a common helper for finding the last extent in a file. Largely based on a patch from Dave Chinner. Signed-off-by: Christoph Hellwig <hch@lst.de> Signed-off-by: Alex Elder <aelder@sgi.com>
| * | xfs: rename xfs_bmapi to xfs_bmapi_writeDave Chinner2011-10-128-212/+135
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Now that all the read-only users of xfs_bmapi have been converted to use xfs_bmapi_read(), we can remove all the read-only handling cases from xfs_bmapi(). Once this is done, rename xfs_bmapi to xfs_bmapi_write to reflect the fact it is for allocation only. This enables us to kill the XFS_BMAPI_WRITE flag as well. Also clean up xfs_bmapi_write to the style used in the newly added xfs_bmapi_read/delay functions. Signed-off-by: Dave Chinner <dchinner@redhat.com> Signed-off-by: Christoph Hellwig <hch@lst.de> Signed-off-by: Alex Elder <aelder@sgi.com>
| * | xfs: factor unwritten extent map manipulations out of xfs_bmapiDave Chinner2011-10-121-37/+70
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | To further improve the readability of xfs_bmapi(), factor the unwritten extent conversion out into a separate function. This removes large block of logic from the xfs_bmapi() code loop and makes it easier to see the operational logic flow for xfs_bmapi(). Signed-off-by: Dave Chinner <dchinner@redhat.com> Signed-off-by: Christoph Hellwig <hch@lst.de> Signed-off-by: Alex Elder <aelder@sgi.com>
| * | xfs: factor extent allocation out of xfs_bmapiDave Chinner2011-10-121-140/+162
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | To further improve the readability of xfs_bmapi(), factor the extent allocation out into a separate function. This removes a large block of logic from the xfs_bmapi() code loop and makes it easier to see the operational logic flow for xfs_bmapi(). Signed-off-by: Dave Chinner <dchinner@redhat.com> Signed-off-by: Christoph Hellwig <hch@lst.de> Signed-off-by: Alex Elder <aelder@sgi.com>
| * | xfs: do not use xfs_bmap_add_extent for adding delalloc extentsChristoph Hellwig2011-10-121-43/+9
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | We can just call xfs_bmap_add_extent_hole_delay directly to add a delayed allocated regions to the extent tree, instead of going through all the complexities of xfs_bmap_add_extent that aren't needed for this simple case. Signed-off-by: Christoph Hellwig <hch@lst.de> Signed-off-by: Alex Elder <aelder@sgi.com>
| * | xfs: introduce xfs_bmapi_delay()Christoph Hellwig2011-10-123-35/+94
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Delalloc reservations are much simpler than allocations, so give them a separate bmapi-level interface. Using the previously added xfs_bmapi_reserve_delalloc we get a function that is only minimally more complicated than xfs_bmapi_read, which is far from the complexity in xfs_bmapi. Also remove the XFS_BMAPI_DELAY code after switching over the only user to xfs_bmapi_delay. Signed-off-by: Christoph Hellwig <hch@lst.de> Signed-off-by: Alex Elder <aelder@sgi.com>
| * | xfs: factor delalloc reservations out of xfs_bmapiChristoph Hellwig2011-10-121-84/+118
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Move the reservation of delayed allocations, and addition of delalloc regions to the extent trees into a new helper function. For now this adds some twisted goto logic to xfs_bmapi, but that will be cleaned up in the following patches. Signed-off-by: Christoph Hellwig <hch@lst.de> Signed-off-by: Alex Elder <aelder@sgi.com>
| * | xfs: remove xfs_bmapi_single()Dave Chinner2011-10-124-112/+19
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Now we have xfs_bmapi_read, there is no need for xfs_bmapi_single(). Change the remaining caller over and kill the function. Signed-off-by: Dave Chinner <dchinner@redhat.com> Signed-off-by: Christoph Hellwig <hch@lst.de> Signed-off-by: Alex Elder <aelder@sgi.com>
| * | xfs: introduce xfs_bmapi_read()Dave Chinner2011-10-1213-77/+151
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | xfs_bmapi() currently handles both extent map reading and allocation. As a result, the code is littered with "if (wr)" branches to conditionally do allocation operations if required. This makes the code much harder to follow and causes significant indent issues with the code. Given that read mapping is much simpler than allocation, we can split out read mapping from xfs_bmapi() and reuse the logic that we have already factored out do do all the hard work of handling the extent map manipulations. The results in a much simpler function for the common extent read operations, and will allow the allocation code to be simplified in another commit. Once xfs_bmapi_read() is implemented, convert all the callers of xfs_bmapi() that are only reading extents to use the new function. Signed-off-by: Dave Chinner <dchinner@redhat.com> Signed-off-by: Christoph Hellwig <hch@lst.de> Signed-off-by: Alex Elder <aelder@sgi.com>
| * | xfs: factor extent map manipulations out of xfs_bmapiDave Chinner2011-10-121-74/+107
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | To further improve the readability of xfs_bmapi(), factor the pure extent map manipulations out into separate functions. This removes large blocks of logic from the xfs_bmapi() code loop and makes it easier to see the operational logic flow for xfs_bmapi(). Signed-off-by: Dave Chinner <dchinner@redhat.com> Signed-off-by: Christoph Hellwig <hch@lst.de> Signed-off-by: Alex Elder <aelder@sgi.com>
| * | xfs: remove the nextents variable in xfs_bmapiChristoph Hellwig2011-10-121-5/+1
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Instead of using a local variable that needs to updated when we modify the extent map just check ifp->if_bytes directly where we use it. Signed-off-by: Christoph Hellwig <hch@lst.de> Signed-off-by: Alex Elder <aelder@sgi.com>
| * | xfs: remove impossible to read code in xfs_bmap_add_extent_delay_realChristoph Hellwig2011-10-121-27/+8
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | We already have the worst case blocks reserved, so xfs_icsb_modify_counters won't fail in xfs_bmap_add_extent_delay_real. In fact we've had an assert to catch this case since day and it never triggered. So remove the code to try smaller reservations, and just return the error for that case in addition to keeping the assert. Signed-off-by: Christoph Hellwig <hch@lst.de> Signed-off-by: Alex Elder <aelder@sgi.com>