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Diffstat (limited to 'fs/xfs/linux-2.6/xfs_aops.c')
-rw-r--r--fs/xfs/linux-2.6/xfs_aops.c156
1 files changed, 90 insertions, 66 deletions
diff --git a/fs/xfs/linux-2.6/xfs_aops.c b/fs/xfs/linux-2.6/xfs_aops.c
index b55cb7f02e8..ed98c7ac7cf 100644
--- a/fs/xfs/linux-2.6/xfs_aops.c
+++ b/fs/xfs/linux-2.6/xfs_aops.c
@@ -104,22 +104,24 @@ xfs_page_trace(
#define xfs_page_trace(tag, inode, page, mask)
#endif
-void
-linvfs_unwritten_done(
- struct buffer_head *bh,
- int uptodate)
+/*
+ * Schedule IO completion handling on a xfsdatad if this was
+ * the final hold on this ioend.
+ */
+STATIC void
+xfs_finish_ioend(
+ xfs_ioend_t *ioend)
{
- xfs_buf_t *pb = (xfs_buf_t *)bh->b_private;
+ if (atomic_dec_and_test(&ioend->io_remaining))
+ queue_work(xfsdatad_workqueue, &ioend->io_work);
+}
- ASSERT(buffer_unwritten(bh));
- bh->b_end_io = NULL;
- clear_buffer_unwritten(bh);
- if (!uptodate)
- pagebuf_ioerror(pb, EIO);
- if (atomic_dec_and_test(&pb->pb_io_remaining) == 1) {
- pagebuf_iodone(pb, 1, 1);
- }
- end_buffer_async_write(bh, uptodate);
+STATIC void
+xfs_destroy_ioend(
+ xfs_ioend_t *ioend)
+{
+ vn_iowake(ioend->io_vnode);
+ mempool_free(ioend, xfs_ioend_pool);
}
/*
@@ -127,20 +129,66 @@ linvfs_unwritten_done(
* to written extents (buffered IO).
*/
STATIC void
-linvfs_unwritten_convert(
- xfs_buf_t *bp)
+xfs_end_bio_unwritten(
+ void *data)
{
- vnode_t *vp = XFS_BUF_FSPRIVATE(bp, vnode_t *);
- int error;
+ xfs_ioend_t *ioend = data;
+ vnode_t *vp = ioend->io_vnode;
+ xfs_off_t offset = ioend->io_offset;
+ size_t size = ioend->io_size;
+ int error;
+
+ if (ioend->io_uptodate)
+ VOP_BMAP(vp, offset, size, BMAPI_UNWRITTEN, NULL, NULL, error);
+ xfs_destroy_ioend(ioend);
+}
+
+/*
+ * Allocate and initialise an IO completion structure.
+ * We need to track unwritten extent write completion here initially.
+ * We'll need to extend this for updating the ondisk inode size later
+ * (vs. incore size).
+ */
+STATIC xfs_ioend_t *
+xfs_alloc_ioend(
+ struct inode *inode)
+{
+ xfs_ioend_t *ioend;
- BUG_ON(atomic_read(&bp->pb_hold) < 1);
- VOP_BMAP(vp, XFS_BUF_OFFSET(bp), XFS_BUF_SIZE(bp),
- BMAPI_UNWRITTEN, NULL, NULL, error);
- XFS_BUF_SET_FSPRIVATE(bp, NULL);
- XFS_BUF_CLR_IODONE_FUNC(bp);
- XFS_BUF_UNDATAIO(bp);
- vn_iowake(vp);
- pagebuf_iodone(bp, 0, 0);
+ ioend = mempool_alloc(xfs_ioend_pool, GFP_NOFS);
+
+ /*
+ * Set the count to 1 initially, which will prevent an I/O
+ * completion callback from happening before we have started
+ * all the I/O from calling the completion routine too early.
+ */
+ atomic_set(&ioend->io_remaining, 1);
+ ioend->io_uptodate = 1; /* cleared if any I/O fails */
+ ioend->io_vnode = LINVFS_GET_VP(inode);
+ atomic_inc(&ioend->io_vnode->v_iocount);
+ ioend->io_offset = 0;
+ ioend->io_size = 0;
+
+ INIT_WORK(&ioend->io_work, xfs_end_bio_unwritten, ioend);
+
+ return ioend;
+}
+
+void
+linvfs_unwritten_done(
+ struct buffer_head *bh,
+ int uptodate)
+{
+ xfs_ioend_t *ioend = bh->b_private;
+
+ ASSERT(buffer_unwritten(bh));
+ bh->b_end_io = NULL;
+ clear_buffer_unwritten(bh);
+ if (!uptodate)
+ ioend->io_uptodate = 0;
+
+ xfs_finish_ioend(ioend);
+ end_buffer_async_write(bh, uptodate);
}
/*
@@ -255,7 +303,7 @@ xfs_probe_unwritten_page(
struct address_space *mapping,
pgoff_t index,
xfs_iomap_t *iomapp,
- xfs_buf_t *pb,
+ xfs_ioend_t *ioend,
unsigned long max_offset,
unsigned long *fsbs,
unsigned int bbits)
@@ -283,7 +331,7 @@ xfs_probe_unwritten_page(
break;
xfs_map_at_offset(page, bh, p_offset, bbits, iomapp);
set_buffer_unwritten_io(bh);
- bh->b_private = pb;
+ bh->b_private = ioend;
p_offset += bh->b_size;
(*fsbs)++;
} while ((bh = bh->b_this_page) != head);
@@ -434,27 +482,15 @@ xfs_map_unwritten(
{
struct buffer_head *bh = curr;
xfs_iomap_t *tmp;
- xfs_buf_t *pb;
- loff_t offset, size;
+ xfs_ioend_t *ioend;
+ loff_t offset;
unsigned long nblocks = 0;
offset = start_page->index;
offset <<= PAGE_CACHE_SHIFT;
offset += p_offset;
- /* get an "empty" pagebuf to manage IO completion
- * Proper values will be set before returning */
- pb = pagebuf_lookup(iomapp->iomap_target, 0, 0, 0);
- if (!pb)
- return -EAGAIN;
-
- atomic_inc(&LINVFS_GET_VP(inode)->v_iocount);
-
- /* Set the count to 1 initially, this will stop an I/O
- * completion callout which happens before we have started
- * all the I/O from calling pagebuf_iodone too early.
- */
- atomic_set(&pb->pb_io_remaining, 1);
+ ioend = xfs_alloc_ioend(inode);
/* First map forwards in the page consecutive buffers
* covering this unwritten extent
@@ -467,12 +503,12 @@ xfs_map_unwritten(
break;
xfs_map_at_offset(start_page, bh, p_offset, block_bits, iomapp);
set_buffer_unwritten_io(bh);
- bh->b_private = pb;
+ bh->b_private = ioend;
p_offset += bh->b_size;
nblocks++;
} while ((bh = bh->b_this_page) != head);
- atomic_add(nblocks, &pb->pb_io_remaining);
+ atomic_add(nblocks, &ioend->io_remaining);
/* If we reached the end of the page, map forwards in any
* following pages which are also covered by this extent.
@@ -489,13 +525,13 @@ xfs_map_unwritten(
tloff = min(tlast, tloff);
for (tindex = start_page->index + 1; tindex < tloff; tindex++) {
page = xfs_probe_unwritten_page(mapping,
- tindex, iomapp, pb,
+ tindex, iomapp, ioend,
PAGE_CACHE_SIZE, &bs, bbits);
if (!page)
break;
nblocks += bs;
- atomic_add(bs, &pb->pb_io_remaining);
- xfs_convert_page(inode, page, iomapp, wbc, pb,
+ atomic_add(bs, &ioend->io_remaining);
+ xfs_convert_page(inode, page, iomapp, wbc, ioend,
startio, all_bh);
/* stop if converting the next page might add
* enough blocks that the corresponding byte
@@ -507,12 +543,12 @@ xfs_map_unwritten(
if (tindex == tlast &&
(pg_offset = (i_size_read(inode) & (PAGE_CACHE_SIZE - 1)))) {
page = xfs_probe_unwritten_page(mapping,
- tindex, iomapp, pb,
+ tindex, iomapp, ioend,
pg_offset, &bs, bbits);
if (page) {
nblocks += bs;
- atomic_add(bs, &pb->pb_io_remaining);
- xfs_convert_page(inode, page, iomapp, wbc, pb,
+ atomic_add(bs, &ioend->io_remaining);
+ xfs_convert_page(inode, page, iomapp, wbc, ioend,
startio, all_bh);
if (nblocks >= ((ULONG_MAX - PAGE_SIZE) >> block_bits))
goto enough;
@@ -521,21 +557,9 @@ xfs_map_unwritten(
}
enough:
- size = nblocks; /* NB: using 64bit number here */
- size <<= block_bits; /* convert fsb's to byte range */
-
- XFS_BUF_DATAIO(pb);
- XFS_BUF_ASYNC(pb);
- XFS_BUF_SET_SIZE(pb, size);
- XFS_BUF_SET_COUNT(pb, size);
- XFS_BUF_SET_OFFSET(pb, offset);
- XFS_BUF_SET_FSPRIVATE(pb, LINVFS_GET_VP(inode));
- XFS_BUF_SET_IODONE_FUNC(pb, linvfs_unwritten_convert);
-
- if (atomic_dec_and_test(&pb->pb_io_remaining) == 1) {
- pagebuf_iodone(pb, 1, 1);
- }
-
+ ioend->io_size = (xfs_off_t)nblocks << block_bits;
+ ioend->io_offset = offset;
+ xfs_finish_ioend(ioend);
return 0;
}
generated by cgit v1.2.3-70-g09d2 (git 2.46.0) at 2024-12-14 02:04:25 +0000