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linux/fs/xfs/xfs_aops.h

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xfs: convert to SPDX license tags Remove the verbose license text from XFS files and replace them with SPDX tags. This does not change the license of any of the code, merely refers to the common, up-to-date license files in LICENSES/ This change was mostly scripted. fs/xfs/Makefile and fs/xfs/libxfs/xfs_fs.h were modified by hand, the rest were detected and modified by the following command: for f in `git grep -l "GNU General" fs/xfs/` ; do echo $f cat $f | awk -f hdr.awk > $f.new mv -f $f.new $f done And the hdr.awk script that did the modification (including detecting the difference between GPL-2.0 and GPL-2.0+ licenses) is as follows: $ cat hdr.awk BEGIN { hdr = 1.0 tag = "GPL-2.0" str = "" } /^ \* This program is free software/ { hdr = 2.0; next } /any later version./ { tag = "GPL-2.0+" next } /^ \*\// { if (hdr > 0.0) { print "// SPDX-License-Identifier: " tag print str print $0 str="" hdr = 0.0 next } print $0 next } /^ \* / { if (hdr > 1.0) next if (hdr > 0.0) { if (str != "") str = str "\n" str = str $0 next } print $0 next } /^ \*/ { if (hdr > 0.0) next print $0 next } // { if (hdr > 0.0) { if (str != "") str = str "\n" str = str $0 next } print $0 } END { } $ Signed-off-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>
2018-06-06 02:42:14 +00:00
// SPDX-License-Identifier: GPL-2.0
[XFS] Add in the new xfs_aops.h header file for I/O completion struct. SGI-PV: 934766 SGI-Modid: xfs-linux:xfs-kern:196857a Signed-off-by: Christoph Hellwig <hch@sgi.com> Signed-off-by: Nathan Scott <nathans@sgi.com>
2005-09-04 22:18:12 +00:00
/*
[XFS] Fix a typo in a header file comment. SGI-PV: 904196 SGI-Modid: xfs-linux-melb:xfs-kern:26101a Signed-off-by: Nathan Scott <nathans@sgi.com>
2006-06-09 05:29:12 +00:00
* Copyright (c) 2005-2006 Silicon Graphics, Inc.
[XFS] Update license/copyright notices to match the prefered SGI boilerplate. SGI-PV: 913862 SGI-Modid: xfs-linux:xfs-kern:23903a Signed-off-by: Nathan Scott <nathans@sgi.com>
2005-11-02 03:58:39 +00:00
* All Rights Reserved.
[XFS] Add in the new xfs_aops.h header file for I/O completion struct. SGI-PV: 934766 SGI-Modid: xfs-linux:xfs-kern:196857a Signed-off-by: Christoph Hellwig <hch@sgi.com> Signed-off-by: Nathan Scott <nathans@sgi.com>
2005-09-04 22:18:12 +00:00
*/
#ifndef __XFS_AOPS_H__
#define __XFS_AOPS_H__
xfs: convert to bioset_init()/mempool_init() Convert XFS to embedded bio sets. Acked-by: Darrick J. Wong <darrick.wong@oracle.com> Reviewed-by: Christoph Hellwig <hch@lst.de> Signed-off-by: Kent Overstreet <kent.overstreet@gmail.com> Signed-off-by: Jens Axboe <axboe@kernel.dk>
2018-05-20 22:25:57 +00:00
extern struct bio_set xfs_ioend_bioset;
[XFS] Add in the new xfs_aops.h header file for I/O completion struct. SGI-PV: 934766 SGI-Modid: xfs-linux:xfs-kern:196857a Signed-off-by: Christoph Hellwig <hch@sgi.com> Signed-off-by: Nathan Scott <nathans@sgi.com>
2005-09-04 22:18:12 +00:00
[XFS] Initial pass at going directly-to-bio on the buffered IO path. This allows us to submit much larger I/Os instead of sending down lots of small buffer_heads. To do this we need to have a rather complicated I/O submission and completion tracking infrastructure. Part of the latter has been merged already a long time ago for direct I/O support. Part of the problem is that we need to track sub-pagesize regions and for that we still need buffer_heads for the time beeing. Long-term I hope we can move to better data strucutures and/or maybe move this to fs/mpage.c instead of having it in XFS. Original patch from Nathan Scott with various updates from David Chinner and Christoph Hellwig. SGI-PV: 947118 SGI-Modid: xfs-linux-melb:xfs-kern:203822a Signed-off-by: Christoph Hellwig <hch@sgi.com> Signed-off-by: Nathan Scott <nathans@sgi.com>
2006-01-11 04:40:13 +00:00
/*
xfs: optimize bio handling in the buffer writeback path This patch implements two closely related changes: First it embeds a bio the ioend structure so that we don't have to allocate one separately. Second it uses the block layer bio chaining mechanism to chain additional bios off this first one if needed instead of manually accounting for multiple bio completions in the ioend structure. Together this removes a memory allocation per ioend and greatly simplifies the ioend setup and I/O completion path. Signed-off-by: Christoph Hellwig <hch@lst.de> Reviewed-by: Brian Foster <bfoster@redhat.com> Signed-off-by: Dave Chinner <david@fromorbit.com>
2016-04-05 22:34:30 +00:00
* Structure for buffered I/O completions.
[XFS] Initial pass at going directly-to-bio on the buffered IO path. This allows us to submit much larger I/Os instead of sending down lots of small buffer_heads. To do this we need to have a rather complicated I/O submission and completion tracking infrastructure. Part of the latter has been merged already a long time ago for direct I/O support. Part of the problem is that we need to track sub-pagesize regions and for that we still need buffer_heads for the time beeing. Long-term I hope we can move to better data strucutures and/or maybe move this to fs/mpage.c instead of having it in XFS. Original patch from Nathan Scott with various updates from David Chinner and Christoph Hellwig. SGI-PV: 947118 SGI-Modid: xfs-linux-melb:xfs-kern:203822a Signed-off-by: Christoph Hellwig <hch@sgi.com> Signed-off-by: Nathan Scott <nathans@sgi.com>
2006-01-11 04:40:13 +00:00
*/
xfs: optimize bio handling in the buffer writeback path This patch implements two closely related changes: First it embeds a bio the ioend structure so that we don't have to allocate one separately. Second it uses the block layer bio chaining mechanism to chain additional bios off this first one if needed instead of manually accounting for multiple bio completions in the ioend structure. Together this removes a memory allocation per ioend and greatly simplifies the ioend setup and I/O completion path. Signed-off-by: Christoph Hellwig <hch@lst.de> Reviewed-by: Brian Foster <bfoster@redhat.com> Signed-off-by: Dave Chinner <david@fromorbit.com>
2016-04-05 22:34:30 +00:00
struct xfs_ioend {
xfs: don't chain ioends during writepage submission Currently we can build a long ioend chain during ->writepages that gets attached to the writepage context. IO submission only then occurs when we finish all the writepage processing. This means we can have many ioends allocated and pending, and this violates the mempool guarantees that we need to give about forwards progress. i.e. we really should only have one ioend being built at a time, otherwise we may drain the mempool trying to allocate a new ioend and that blocks submission, completion and freeing of ioends that are already in progress. To prevent this situation from happening, we need to submit ioends for IO as soon as they are ready for dispatch rather than queuing them for later submission. This means the ioends have bios built immediately and they get queued on any plug that is current active. Hence if we schedule away from writeback, the ioends that have been built will make forwards progress due to the plug flushing on context switch. This will also prevent context switches from creating unnecessary IO submission latency. We can't completely avoid having nested IO allocation - when we have a block size smaller than a page size, we still need to hold the ioend submission until after we have marked the current page dirty. Hence we may need multiple ioends to be held while the current page is completely mapped and made ready for IO dispatch. We cannot avoid this problem - the current code already has this ioend chaining within a page so we can mostly ignore that it occurs. Signed-off-by: Dave Chinner <dchinner@redhat.com> Reviewed-by: Christoph Hellwig <hch@lst.de> Signed-off-by: Dave Chinner <david@fromorbit.com>
2016-02-15 06:23:12 +00:00
struct list_head io_list; /* next ioend in chain */
xfs: remove the io_type field from the writeback context and ioend The io_type field contains what is basically a summary of information from the inode fork and the imap. But we can just as easily use that information directly, simplifying a few bits here and there and improving the trace points. 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>
2019-02-15 16:02:46 +00:00
int io_fork; /* inode fork written back */
xfs_exntst_t io_state; /* extent state */
[XFS] move v_iocount from bhv_vnode to xfs_inode struct bhv_vnode is on it's way out, so move the I/O count to the XFS inode. SGI-PV: 969608 SGI-Modid: xfs-linux-melb:xfs-kern:29497a Signed-off-by: Christoph Hellwig <hch@infradead.org> Signed-off-by: David Chinner <dgc@sgi.com> Signed-off-by: Tim Shimmin <tes@sgi.com>
2007-08-29 01:46:28 +00:00
struct inode *io_inode; /* file being written to */
[XFS] Add in the new xfs_aops.h header file for I/O completion struct. SGI-PV: 934766 SGI-Modid: xfs-linux:xfs-kern:196857a Signed-off-by: Christoph Hellwig <hch@sgi.com> Signed-off-by: Nathan Scott <nathans@sgi.com>
2005-09-04 22:18:12 +00:00
size_t io_size; /* size of the extent */
xfs_off_t io_offset; /* offset in the file */
xfs: log file size updates at I/O completion time Do not use unlogged metadata updates and the VFS dirty bit for updating the file size after writeback. In addition to causing various problems with updates getting delayed for far too long this also drags in the unscalable VFS dirty tracking, and is one of the few remaining unlogged metadata updates. Reviewed-by: Dave Chinner <dchinner@redhat.com> Signed-off-by: Christoph Hellwig <hch@lst.de> Reviewed-by: Mark Tinguely <tinguely@sgi.com> Signed-off-by: Ben Myers <bpm@sgi.com>
2012-03-13 08:41:05 +00:00
struct xfs_trans *io_append_trans;/* xact. for size update */
xfs: build bios directly in xfs_add_to_ioend Currently adding a buffer to the ioend and then building a bio from the buffer list are two separate operations. We don't build the bios and submit them until the ioend is submitted, and this places a fixed dependency on bufferhead chaining in the ioend. The first step to removing the bufferhead chaining in the ioend is on the IO submission side. We can build the bio directly as we add the buffers to the ioend chain, thereby removing the need for a latter "buffer-to-bio" submission loop. This allows us to submit bios on large ioends as soon as we cannot add more data to the bio. These bios then get captured by the active plug, and hence will be dispatched as soon as either the plug overflows or we schedule away from the writeback context. This will reduce submission latency for large IOs, but will also allow more timely request queue based writeback blocking when the device becomes congested. Signed-off-by: Dave Chinner <dchinner@redhat.com> [hch: various small updates] Signed-off-by: Christoph Hellwig <hch@lst.de> Reviewed-by: Brian Foster <bfoster@redhat.com> Signed-off-by: Dave Chinner <david@fromorbit.com>
2016-04-05 22:11:25 +00:00
struct bio *io_bio; /* bio being built */
xfs: optimize bio handling in the buffer writeback path This patch implements two closely related changes: First it embeds a bio the ioend structure so that we don't have to allocate one separately. Second it uses the block layer bio chaining mechanism to chain additional bios off this first one if needed instead of manually accounting for multiple bio completions in the ioend structure. Together this removes a memory allocation per ioend and greatly simplifies the ioend setup and I/O completion path. Signed-off-by: Christoph Hellwig <hch@lst.de> Reviewed-by: Brian Foster <bfoster@redhat.com> Signed-off-by: Dave Chinner <david@fromorbit.com>
2016-04-05 22:34:30 +00:00
struct bio io_inline_bio; /* MUST BE LAST! */
};
[XFS] Add in the new xfs_aops.h header file for I/O completion struct. SGI-PV: 934766 SGI-Modid: xfs-linux:xfs-kern:196857a Signed-off-by: Christoph Hellwig <hch@sgi.com> Signed-off-by: Nathan Scott <nathans@sgi.com>
2005-09-04 22:18:12 +00:00
[PATCH] mark address_space_operations const Same as with already do with the file operations: keep them in .rodata and prevents people from doing runtime patching. Signed-off-by: Christoph Hellwig <hch@lst.de> Cc: Steven French <sfrench@us.ibm.com> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
2006-06-28 11:26:44 +00:00
extern const struct address_space_operations xfs_address_space_operations;
xfs, dax: introduce xfs_dax_aops In preparation for the dax implementation to start associating dax pages to inodes via page->mapping, we need to provide a 'struct address_space_operations' instance for dax. Otherwise, direct-I/O triggers incorrect page cache assumptions and warnings like the following: WARNING: CPU: 27 PID: 1783 at fs/xfs/xfs_aops.c:1468 xfs_vm_set_page_dirty+0xf3/0x1b0 [xfs] [..] CPU: 27 PID: 1783 Comm: dma-collision Tainted: G O 4.15.0-rc2+ #984 [..] Call Trace: set_page_dirty_lock+0x40/0x60 bio_set_pages_dirty+0x37/0x50 iomap_dio_actor+0x2b7/0x3b0 ? iomap_dio_zero+0x110/0x110 iomap_apply+0xa4/0x110 iomap_dio_rw+0x29e/0x3b0 ? iomap_dio_zero+0x110/0x110 ? xfs_file_dio_aio_read+0x7c/0x1a0 [xfs] xfs_file_dio_aio_read+0x7c/0x1a0 [xfs] xfs_file_read_iter+0xa0/0xc0 [xfs] __vfs_read+0xf9/0x170 vfs_read+0xa6/0x150 SyS_pread64+0x93/0xb0 entry_SYSCALL_64_fastpath+0x1f/0x96 ...where the default set_page_dirty() handler assumes that dirty state is being tracked in 'struct page' flags. Cc: Jeff Moyer <jmoyer@redhat.com> Cc: Matthew Wilcox <mawilcox@microsoft.com> Cc: Ross Zwisler <ross.zwisler@linux.intel.com> Suggested-by: Jan Kara <jack@suse.cz> Suggested-by: Dave Chinner <david@fromorbit.com> Reviewed-by: Christoph Hellwig <hch@lst.de> Reviewed-by: Jan Kara <jack@suse.cz> Signed-off-by: Dan Williams <dan.j.williams@intel.com>
2018-03-07 23:26:44 +00:00
extern const struct address_space_operations xfs_dax_aops;
xfs: add DAX file operations support Add the initial support for DAX file operations to XFS. This includes the necessary block allocation and mmap page fault hooks for DAX to function. Note that there are changes to the splice interfaces to ensure that for DAX splice avoids direct page cache manipulations and instead takes the DAX IO paths for read/write operations. Signed-off-by: Dave Chinner <dchinner@redhat.com> Reviewed-by: Brian Foster <bfoster@redhat.com> Signed-off-by: Dave Chinner <david@fromorbit.com>
2015-06-03 23:18:53 +00:00
xfs: refactor xfs_setfilesize Rename the current function to __xfs_setfilesize and add a non-static wrapper that also takes care of creating the transaction. This new helper will be used by the new iomap-based DAX path. Signed-off-by: Christoph Hellwig <hch@lst.de> Reviewed-by: Dave Chinner <dchinner@redhat.com> Signed-off-by: Dave Chinner <david@fromorbit.com>
2016-09-19 01:26:41 +00:00
int xfs_setfilesize(struct xfs_inode *ip, xfs_off_t offset, size_t size);
xfs: direct calls in the direct I/O path We control both the callers and callees of ->direct_IO, so remove the indirect calls. Signed-off-by: Christoph Hellwig <hch@lst.de> Reviewed-by: Dave Chinner <dchinner@redhat.com> Signed-off-by: Dave Chinner <david@fromorbit.com>
2016-07-20 01:38:01 +00:00
xfs: simplify xfs_vm_writepage The writepage implementation in XFS still tries to deal with dirty but unmapped buffers which used to caused by writes through shared mmaps. Since the introduction of ->page_mkwrite these can't happen anymore, so remove the code dealing with them. Note that the all_bh variable which causes us to start I/O on all buffers on the pages was controlled by the count of unmapped buffers, which also included those not actually dirty. It's now unconditionally initialized to 0 but set to 1 for the case of small file size extensions. It probably can be removed entirely, but that's left for another patch. Signed-off-by: Christoph Hellwig <hch@lst.de> Reviewed-by: Dave Chinner <dchinner@redhat.com>
2010-06-23 23:46:01 +00:00
extern void xfs_count_page_state(struct page *, int *, int *);
dax: give DAX clearing code correct bdev dax_clear_blocks() needs a valid struct block_device and previously it was using inode->i_sb->s_bdev in all cases. This is correct for normal inodes on mounted ext2, ext4 and XFS filesystems, but is incorrect for DAX raw block devices and for XFS real-time devices. Instead, rename dax_clear_blocks() to dax_clear_sectors(), and change its arguments to take a bdev and a sector instead of an inode and a block. This better reflects what the function does, and it allows the filesystem and raw block device code to pass in an appropriate struct block_device. Signed-off-by: Ross Zwisler <ross.zwisler@linux.intel.com> Suggested-by: Dan Williams <dan.j.williams@intel.com> Reviewed-by: Jan Kara <jack@suse.cz> Cc: Theodore Ts'o <tytso@mit.edu> Cc: Al Viro <viro@ftp.linux.org.uk> Cc: Dave Chinner <david@fromorbit.com> Cc: Jens Axboe <axboe@fb.com> Cc: Matthew Wilcox <matthew.r.wilcox@intel.com> Cc: Ross Zwisler <ross.zwisler@linux.intel.com> Cc: Theodore Ts'o <tytso@mit.edu> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2016-02-26 23:19:52 +00:00
extern struct block_device *xfs_find_bdev_for_inode(struct inode *);
xfs: perform dax_device lookup at mount The ->iomap_begin() operation is a hot path, so cache the fs_dax_get_by_host() result at mount time to avoid the incurring the hash lookup overhead on a per-i/o basis. Reported-by: Christoph Hellwig <hch@lst.de> Reviewed-by: Christoph Hellwig <hch@lst.de> Reviewed-by: Darrick J. Wong <darrick.wong@oracle.com> Signed-off-by: Dan Williams <dan.j.williams@intel.com>
2017-08-24 22:12:50 +00:00
extern struct dax_device *xfs_find_daxdev_for_inode(struct inode *);
xfs: event tracing support Convert the old xfs tracing support that could only be used with the out of tree kdb and xfsidbg patches to use the generic event tracer. To use it make sure CONFIG_EVENT_TRACING is enabled and then enable all xfs trace channels by: echo 1 > /sys/kernel/debug/tracing/events/xfs/enable or alternatively enable single events by just doing the same in one event subdirectory, e.g. echo 1 > /sys/kernel/debug/tracing/events/xfs/xfs_ihold/enable or set more complex filters, etc. In Documentation/trace/events.txt all this is desctribed in more detail. To reads the events do a cat /sys/kernel/debug/tracing/trace Compared to the last posting this patch converts the tracing mostly to the one tracepoint per callsite model that other users of the new tracing facility also employ. This allows a very fine-grained control of the tracing, a cleaner output of the traces and also enables the perf tool to use each tracepoint as a virtual performance counter, allowing us to e.g. count how often certain workloads git various spots in XFS. Take a look at http://lwn.net/Articles/346470/ for some examples. Also the btree tracing isn't included at all yet, as it will require additional core tracing features not in mainline yet, I plan to deliver it later. And the really nice thing about this patch is that it actually removes many lines of code while adding this nice functionality: fs/xfs/Makefile | 8 fs/xfs/linux-2.6/xfs_acl.c | 1 fs/xfs/linux-2.6/xfs_aops.c | 52 - fs/xfs/linux-2.6/xfs_aops.h | 2 fs/xfs/linux-2.6/xfs_buf.c | 117 +-- fs/xfs/linux-2.6/xfs_buf.h | 33 fs/xfs/linux-2.6/xfs_fs_subr.c | 3 fs/xfs/linux-2.6/xfs_ioctl.c | 1 fs/xfs/linux-2.6/xfs_ioctl32.c | 1 fs/xfs/linux-2.6/xfs_iops.c | 1 fs/xfs/linux-2.6/xfs_linux.h | 1 fs/xfs/linux-2.6/xfs_lrw.c | 87 -- fs/xfs/linux-2.6/xfs_lrw.h | 45 - fs/xfs/linux-2.6/xfs_super.c | 104 --- fs/xfs/linux-2.6/xfs_super.h | 7 fs/xfs/linux-2.6/xfs_sync.c | 1 fs/xfs/linux-2.6/xfs_trace.c | 75 ++ fs/xfs/linux-2.6/xfs_trace.h | 1369 +++++++++++++++++++++++++++++++++++++++++ fs/xfs/linux-2.6/xfs_vnode.h | 4 fs/xfs/quota/xfs_dquot.c | 110 --- fs/xfs/quota/xfs_dquot.h | 21 fs/xfs/quota/xfs_qm.c | 40 - fs/xfs/quota/xfs_qm_syscalls.c | 4 fs/xfs/support/ktrace.c | 323 --------- fs/xfs/support/ktrace.h | 85 -- fs/xfs/xfs.h | 16 fs/xfs/xfs_ag.h | 14 fs/xfs/xfs_alloc.c | 230 +----- fs/xfs/xfs_alloc.h | 27 fs/xfs/xfs_alloc_btree.c | 1 fs/xfs/xfs_attr.c | 107 --- fs/xfs/xfs_attr.h | 10 fs/xfs/xfs_attr_leaf.c | 14 fs/xfs/xfs_attr_sf.h | 40 - fs/xfs/xfs_bmap.c | 507 +++------------ fs/xfs/xfs_bmap.h | 49 - fs/xfs/xfs_bmap_btree.c | 6 fs/xfs/xfs_btree.c | 5 fs/xfs/xfs_btree_trace.h | 17 fs/xfs/xfs_buf_item.c | 87 -- fs/xfs/xfs_buf_item.h | 20 fs/xfs/xfs_da_btree.c | 3 fs/xfs/xfs_da_btree.h | 7 fs/xfs/xfs_dfrag.c | 2 fs/xfs/xfs_dir2.c | 8 fs/xfs/xfs_dir2_block.c | 20 fs/xfs/xfs_dir2_leaf.c | 21 fs/xfs/xfs_dir2_node.c | 27 fs/xfs/xfs_dir2_sf.c | 26 fs/xfs/xfs_dir2_trace.c | 216 ------ fs/xfs/xfs_dir2_trace.h | 72 -- fs/xfs/xfs_filestream.c | 8 fs/xfs/xfs_fsops.c | 2 fs/xfs/xfs_iget.c | 111 --- fs/xfs/xfs_inode.c | 67 -- fs/xfs/xfs_inode.h | 76 -- fs/xfs/xfs_inode_item.c | 5 fs/xfs/xfs_iomap.c | 85 -- fs/xfs/xfs_iomap.h | 8 fs/xfs/xfs_log.c | 181 +---- fs/xfs/xfs_log_priv.h | 20 fs/xfs/xfs_log_recover.c | 1 fs/xfs/xfs_mount.c | 2 fs/xfs/xfs_quota.h | 8 fs/xfs/xfs_rename.c | 1 fs/xfs/xfs_rtalloc.c | 1 fs/xfs/xfs_rw.c | 3 fs/xfs/xfs_trans.h | 47 + fs/xfs/xfs_trans_buf.c | 62 - fs/xfs/xfs_vnodeops.c | 8 70 files changed, 2151 insertions(+), 2592 deletions(-) Signed-off-by: Christoph Hellwig <hch@lst.de> Signed-off-by: Alex Elder <aelder@sgi.com>
2009-12-14 23:14:59 +00:00
[XFS] Fix a typo in a header file comment. SGI-PV: 904196 SGI-Modid: xfs-linux-melb:xfs-kern:26101a Signed-off-by: Nathan Scott <nathans@sgi.com>
2006-06-09 05:29:12 +00:00
#endif /* __XFS_AOPS_H__ */
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