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@ -20,9 +20,6 @@
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#include "xfs_bmap_util.h"
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#include "xfs_bmap_btree.h"
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#include "xfs_reflink.h"
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#include <linux/gfp.h>
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#include <linux/mpage.h>
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#include <linux/pagevec.h>
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#include <linux/writeback.h>
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/*
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@ -34,25 +31,6 @@ struct xfs_writepage_ctx {
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struct xfs_ioend *ioend;
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};
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void
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xfs_count_page_state(
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struct page *page,
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int *delalloc,
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int *unwritten)
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{
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struct buffer_head *bh, *head;
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*delalloc = *unwritten = 0;
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bh = head = page_buffers(page);
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do {
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if (buffer_unwritten(bh))
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(*unwritten) = 1;
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else if (buffer_delay(bh))
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(*delalloc) = 1;
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} while ((bh = bh->b_this_page) != head);
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}
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struct block_device *
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xfs_find_bdev_for_inode(
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struct inode *inode)
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@ -85,67 +63,17 @@ xfs_finish_page_writeback(
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struct bio_vec *bvec,
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int error)
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{
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struct iomap_page *iop = to_iomap_page(bvec->bv_page);
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if (error) {
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SetPageError(bvec->bv_page);
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mapping_set_error(inode->i_mapping, -EIO);
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}
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end_page_writeback(bvec->bv_page);
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}
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/*
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* We're now finished for good with this page. Update the page state via the
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* associated buffer_heads, paying attention to the start and end offsets that
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* we need to process on the page.
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*
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* Note that we open code the action in end_buffer_async_write here so that we
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* only have to iterate over the buffers attached to the page once. This is not
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* only more efficient, but also ensures that we only calls end_page_writeback
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* at the end of the iteration, and thus avoids the pitfall of having the page
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* and buffers potentially freed after every call to end_buffer_async_write.
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*/
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static void
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xfs_finish_buffer_writeback(
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struct inode *inode,
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struct bio_vec *bvec,
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int error)
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{
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struct buffer_head *head = page_buffers(bvec->bv_page), *bh = head;
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bool busy = false;
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unsigned int off = 0;
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unsigned long flags;
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ASSERT(iop || i_blocksize(inode) == PAGE_SIZE);
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ASSERT(!iop || atomic_read(&iop->write_count) > 0);
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ASSERT(bvec->bv_offset < PAGE_SIZE);
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ASSERT((bvec->bv_offset & (i_blocksize(inode) - 1)) == 0);
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ASSERT(bvec->bv_offset + bvec->bv_len <= PAGE_SIZE);
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ASSERT((bvec->bv_len & (i_blocksize(inode) - 1)) == 0);
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local_irq_save(flags);
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bit_spin_lock(BH_Uptodate_Lock, &head->b_state);
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do {
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if (off >= bvec->bv_offset &&
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off < bvec->bv_offset + bvec->bv_len) {
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ASSERT(buffer_async_write(bh));
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ASSERT(bh->b_end_io == NULL);
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if (error) {
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mark_buffer_write_io_error(bh);
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clear_buffer_uptodate(bh);
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SetPageError(bvec->bv_page);
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} else {
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set_buffer_uptodate(bh);
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}
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clear_buffer_async_write(bh);
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unlock_buffer(bh);
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} else if (buffer_async_write(bh)) {
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ASSERT(buffer_locked(bh));
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busy = true;
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}
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off += bh->b_size;
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} while ((bh = bh->b_this_page) != head);
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bit_spin_unlock(BH_Uptodate_Lock, &head->b_state);
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local_irq_restore(flags);
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if (!busy)
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if (!iop || atomic_dec_and_test(&iop->write_count))
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end_page_writeback(bvec->bv_page);
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}
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@ -179,12 +107,8 @@ xfs_destroy_ioend(
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next = bio->bi_private;
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/* walk each page on bio, ending page IO on them */
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bio_for_each_segment_all(bvec, bio, i) {
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if (page_has_buffers(bvec->bv_page))
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xfs_finish_buffer_writeback(inode, bvec, error);
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else
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xfs_finish_page_writeback(inode, bvec, error);
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}
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bio_for_each_segment_all(bvec, bio, i)
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xfs_finish_page_writeback(inode, bvec, error);
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bio_put(bio);
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}
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@ -638,6 +562,7 @@ xfs_add_to_ioend(
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struct inode *inode,
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xfs_off_t offset,
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struct page *page,
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struct iomap_page *iop,
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struct xfs_writepage_ctx *wpc,
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struct writeback_control *wbc,
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struct list_head *iolist)
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@ -661,100 +586,37 @@ xfs_add_to_ioend(
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bdev, sector);
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}
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/*
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* If the block doesn't fit into the bio we need to allocate a new
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* one. This shouldn't happen more than once for a given block.
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*/
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while (bio_add_page(wpc->ioend->io_bio, page, len, poff) != len)
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xfs_chain_bio(wpc->ioend, wbc, bdev, sector);
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if (!__bio_try_merge_page(wpc->ioend->io_bio, page, len, poff)) {
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if (iop)
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atomic_inc(&iop->write_count);
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if (bio_full(wpc->ioend->io_bio))
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xfs_chain_bio(wpc->ioend, wbc, bdev, sector);
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__bio_add_page(wpc->ioend->io_bio, page, len, poff);
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}
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wpc->ioend->io_size += len;
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}
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STATIC void
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xfs_map_buffer(
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struct inode *inode,
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struct buffer_head *bh,
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struct xfs_bmbt_irec *imap,
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xfs_off_t offset)
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{
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sector_t bn;
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struct xfs_mount *m = XFS_I(inode)->i_mount;
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xfs_off_t iomap_offset = XFS_FSB_TO_B(m, imap->br_startoff);
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xfs_daddr_t iomap_bn = xfs_fsb_to_db(XFS_I(inode), imap->br_startblock);
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ASSERT(imap->br_startblock != HOLESTARTBLOCK);
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ASSERT(imap->br_startblock != DELAYSTARTBLOCK);
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bn = (iomap_bn >> (inode->i_blkbits - BBSHIFT)) +
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((offset - iomap_offset) >> inode->i_blkbits);
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ASSERT(bn || XFS_IS_REALTIME_INODE(XFS_I(inode)));
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bh->b_blocknr = bn;
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set_buffer_mapped(bh);
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}
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STATIC void
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xfs_map_at_offset(
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struct inode *inode,
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struct buffer_head *bh,
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struct xfs_bmbt_irec *imap,
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xfs_off_t offset)
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{
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ASSERT(imap->br_startblock != HOLESTARTBLOCK);
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ASSERT(imap->br_startblock != DELAYSTARTBLOCK);
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lock_buffer(bh);
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xfs_map_buffer(inode, bh, imap, offset);
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set_buffer_mapped(bh);
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clear_buffer_delay(bh);
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clear_buffer_unwritten(bh);
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/*
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* If this is a realtime file, data may be on a different device.
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* to that pointed to from the buffer_head b_bdev currently. We can't
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* trust that the bufferhead has a already been mapped correctly, so
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* set the bdev now.
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*/
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bh->b_bdev = xfs_find_bdev_for_inode(inode);
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bh->b_end_io = NULL;
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set_buffer_async_write(bh);
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set_buffer_uptodate(bh);
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clear_buffer_dirty(bh);
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}
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STATIC void
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xfs_vm_invalidatepage(
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struct page *page,
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unsigned int offset,
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unsigned int length)
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{
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trace_xfs_invalidatepage(page->mapping->host, page, offset,
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length);
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/*
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* If we are invalidating the entire page, clear the dirty state from it
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* so that we can check for attempts to release dirty cached pages in
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* xfs_vm_releasepage().
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*/
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if (offset == 0 && length >= PAGE_SIZE)
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cancel_dirty_page(page);
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block_invalidatepage(page, offset, length);
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trace_xfs_invalidatepage(page->mapping->host, page, offset, length);
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iomap_invalidatepage(page, offset, length);
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}
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/*
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* If the page has delalloc buffers on it, we need to punch them out before we
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* invalidate the page. If we don't, we leave a stale delalloc mapping on the
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* inode that can trip a BUG() in xfs_get_blocks() later on if a direct IO read
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* is done on that same region - the delalloc extent is returned when none is
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* supposed to be there.
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* If the page has delalloc blocks on it, we need to punch them out before we
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* invalidate the page. If we don't, we leave a stale delalloc mapping on the
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* inode that can trip up a later direct I/O read operation on the same region.
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*
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* We prevent this by truncating away the delalloc regions on the page before
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* invalidating it. Because they are delalloc, we can do this without needing a
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* transaction. Indeed - if we get ENOSPC errors, we have to be able to do this
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* truncation without a transaction as there is no space left for block
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* reservation (typically why we see a ENOSPC in writeback).
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* We prevent this by truncating away the delalloc regions on the page. Because
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* they are delalloc, we can do this without needing a transaction. Indeed - if
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* we get ENOSPC errors, we have to be able to do this truncation without a
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* transaction as there is no space left for block reservation (typically why we
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* see a ENOSPC in writeback).
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*/
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STATIC void
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xfs_aops_discard_page(
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@ -786,7 +648,7 @@ out_invalidate:
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* We implement an immediate ioend submission policy here to avoid needing to
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* chain multiple ioends and hence nest mempool allocations which can violate
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* forward progress guarantees we need to provide. The current ioend we are
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* adding buffers to is cached on the writepage context, and if the new buffer
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* adding blocks to is cached on the writepage context, and if the new block
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* does not append to the cached ioend it will create a new ioend and cache that
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* instead.
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*
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@ -807,54 +669,33 @@ xfs_writepage_map(
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uint64_t end_offset)
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{
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LIST_HEAD(submit_list);
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struct iomap_page *iop = to_iomap_page(page);
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unsigned len = i_blocksize(inode);
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struct xfs_ioend *ioend, *next;
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struct buffer_head *bh = NULL;
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ssize_t len = i_blocksize(inode);
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uint64_t file_offset; /* file offset of page */
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unsigned poffset; /* offset into page */
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int error = 0;
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int count = 0;
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int error = 0, count = 0, i;
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if (page_has_buffers(page))
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bh = page_buffers(page);
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ASSERT(iop || i_blocksize(inode) == PAGE_SIZE);
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ASSERT(!iop || atomic_read(&iop->write_count) == 0);
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/*
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* Walk the blocks on the page, and if we run off the end of the current
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* map or find the current map invalid, grab a new one. We only use
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* bufferheads here to check per-block state - they no longer control
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* the iteration through the page. This allows us to replace the
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* bufferhead with some other state tracking mechanism in future.
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* Walk through the page to find areas to write back. If we run off the
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* end of the current map or find the current map invalid, grab a new
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* one.
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*/
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for (poffset = 0, file_offset = page_offset(page);
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poffset < PAGE_SIZE;
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poffset += len, file_offset += len) {
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/* past the range we are writing, so nothing more to write. */
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if (file_offset >= end_offset)
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break;
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if (bh && !buffer_uptodate(bh)) {
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if (PageUptodate(page))
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ASSERT(buffer_mapped(bh));
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bh = bh->b_this_page;
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for (i = 0, file_offset = page_offset(page);
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i < (PAGE_SIZE >> inode->i_blkbits) && file_offset < end_offset;
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i++, file_offset += len) {
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if (iop && !test_bit(i, iop->uptodate))
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continue;
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}
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error = xfs_map_blocks(wpc, inode, file_offset);
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if (error)
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|
|
|
break;
|
|
|
|
|
|
|
|
|
|
if (wpc->io_type == XFS_IO_HOLE) {
|
|
|
|
|
if (bh)
|
|
|
|
|
bh = bh->b_this_page;
|
|
|
|
|
if (wpc->io_type == XFS_IO_HOLE)
|
|
|
|
|
continue;
|
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
if (bh) {
|
|
|
|
|
xfs_map_at_offset(inode, bh, &wpc->imap, file_offset);
|
|
|
|
|
bh = bh->b_this_page;
|
|
|
|
|
}
|
|
|
|
|
xfs_add_to_ioend(inode, file_offset, page, wpc, wbc,
|
|
|
|
|
&submit_list);
|
|
|
|
|
xfs_add_to_ioend(inode, file_offset, page, iop, wpc, wbc,
|
|
|
|
|
&submit_list);
|
|
|
|
|
count++;
|
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
@ -863,21 +704,18 @@ xfs_writepage_map(
|
|
|
|
|
ASSERT(!PageWriteback(page));
|
|
|
|
|
|
|
|
|
|
/*
|
|
|
|
|
* On error, we have to fail the ioend here because we have locked
|
|
|
|
|
* buffers in the ioend. If we don't do this, we'll deadlock
|
|
|
|
|
* invalidating the page as that tries to lock the buffers on the page.
|
|
|
|
|
* Also, because we may have set pages under writeback, we have to make
|
|
|
|
|
* sure we run IO completion to mark the error state of the IO
|
|
|
|
|
* appropriately, so we can't cancel the ioend directly here. That means
|
|
|
|
|
* we have to mark this page as under writeback if we included any
|
|
|
|
|
* buffers from it in the ioend chain so that completion treats it
|
|
|
|
|
* correctly.
|
|
|
|
|
* On error, we have to fail the ioend here because we may have set
|
|
|
|
|
* pages under writeback, we have to make sure we run IO completion to
|
|
|
|
|
* mark the error state of the IO appropriately, so we can't cancel the
|
|
|
|
|
* ioend directly here. That means we have to mark this page as under
|
|
|
|
|
* writeback if we included any blocks from it in the ioend chain so
|
|
|
|
|
* that completion treats it correctly.
|
|
|
|
|
*
|
|
|
|
|
* If we didn't include the page in the ioend, the on error we can
|
|
|
|
|
* simply discard and unlock it as there are no other users of the page
|
|
|
|
|
* or it's buffers right now. The caller will still need to trigger
|
|
|
|
|
* submission of outstanding ioends on the writepage context so they are
|
|
|
|
|
* treated correctly on error.
|
|
|
|
|
* now. The caller will still need to trigger submission of outstanding
|
|
|
|
|
* ioends on the writepage context so they are treated correctly on
|
|
|
|
|
* error.
|
|
|
|
|
*/
|
|
|
|
|
if (unlikely(error)) {
|
|
|
|
|
if (!count) {
|
|
|
|
|
@ -918,8 +756,8 @@ xfs_writepage_map(
|
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
/*
|
|
|
|
|
* We can end up here with no error and nothing to write if we race with
|
|
|
|
|
* a partial page truncate on a sub-page block sized filesystem.
|
|
|
|
|
* We can end up here with no error and nothing to write only if we race
|
|
|
|
|
* with a partial page truncate on a sub-page block sized filesystem.
|
|
|
|
|
*/
|
|
|
|
|
if (!count)
|
|
|
|
|
end_page_writeback(page);
|
|
|
|
|
@ -934,7 +772,6 @@ done:
|
|
|
|
|
* For delalloc space on the page we need to allocate space and flush it.
|
|
|
|
|
* For unwritten space on the page we need to start the conversion to
|
|
|
|
|
* regular allocated space.
|
|
|
|
|
* For any other dirty buffer heads on the page we should flush them.
|
|
|
|
|
*/
|
|
|
|
|
STATIC int
|
|
|
|
|
xfs_do_writepage(
|
|
|
|
|
@ -1088,166 +925,13 @@ xfs_dax_writepages(
|
|
|
|
|
xfs_find_bdev_for_inode(mapping->host), wbc);
|
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
/*
|
|
|
|
|
* Called to move a page into cleanable state - and from there
|
|
|
|
|
* to be released. The page should already be clean. We always
|
|
|
|
|
* have buffer heads in this call.
|
|
|
|
|
*
|
|
|
|
|
* Returns 1 if the page is ok to release, 0 otherwise.
|
|
|
|
|
*/
|
|
|
|
|
STATIC int
|
|
|
|
|
xfs_vm_releasepage(
|
|
|
|
|
struct page *page,
|
|
|
|
|
gfp_t gfp_mask)
|
|
|
|
|
{
|
|
|
|
|
int delalloc, unwritten;
|
|
|
|
|
|
|
|
|
|
trace_xfs_releasepage(page->mapping->host, page, 0, 0);
|
|
|
|
|
|
|
|
|
|
/*
|
|
|
|
|
* mm accommodates an old ext3 case where clean pages might not have had
|
|
|
|
|
* the dirty bit cleared. Thus, it can send actual dirty pages to
|
|
|
|
|
* ->releasepage() via shrink_active_list(). Conversely,
|
|
|
|
|
* block_invalidatepage() can send pages that are still marked dirty but
|
|
|
|
|
* otherwise have invalidated buffers.
|
|
|
|
|
*
|
|
|
|
|
* We want to release the latter to avoid unnecessary buildup of the
|
|
|
|
|
* LRU, so xfs_vm_invalidatepage() clears the page dirty flag on pages
|
|
|
|
|
* that are entirely invalidated and need to be released. Hence the
|
|
|
|
|
* only time we should get dirty pages here is through
|
|
|
|
|
* shrink_active_list() and so we can simply skip those now.
|
|
|
|
|
*
|
|
|
|
|
* warn if we've left any lingering delalloc/unwritten buffers on clean
|
|
|
|
|
* or invalidated pages we are about to release.
|
|
|
|
|
*/
|
|
|
|
|
if (PageDirty(page))
|
|
|
|
|
return 0;
|
|
|
|
|
|
|
|
|
|
xfs_count_page_state(page, &delalloc, &unwritten);
|
|
|
|
|
|
|
|
|
|
if (WARN_ON_ONCE(delalloc))
|
|
|
|
|
return 0;
|
|
|
|
|
if (WARN_ON_ONCE(unwritten))
|
|
|
|
|
return 0;
|
|
|
|
|
|
|
|
|
|
return try_to_free_buffers(page);
|
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
/*
|
|
|
|
|
* If this is O_DIRECT or the mpage code calling tell them how large the mapping
|
|
|
|
|
* is, so that we can avoid repeated get_blocks calls.
|
|
|
|
|
*
|
|
|
|
|
* If the mapping spans EOF, then we have to break the mapping up as the mapping
|
|
|
|
|
* for blocks beyond EOF must be marked new so that sub block regions can be
|
|
|
|
|
* correctly zeroed. We can't do this for mappings within EOF unless the mapping
|
|
|
|
|
* was just allocated or is unwritten, otherwise the callers would overwrite
|
|
|
|
|
* existing data with zeros. Hence we have to split the mapping into a range up
|
|
|
|
|
* to and including EOF, and a second mapping for beyond EOF.
|
|
|
|
|
*/
|
|
|
|
|
static void
|
|
|
|
|
xfs_map_trim_size(
|
|
|
|
|
struct inode *inode,
|
|
|
|
|
sector_t iblock,
|
|
|
|
|
struct buffer_head *bh_result,
|
|
|
|
|
struct xfs_bmbt_irec *imap,
|
|
|
|
|
xfs_off_t offset,
|
|
|
|
|
ssize_t size)
|
|
|
|
|
{
|
|
|
|
|
xfs_off_t mapping_size;
|
|
|
|
|
|
|
|
|
|
mapping_size = imap->br_startoff + imap->br_blockcount - iblock;
|
|
|
|
|
mapping_size <<= inode->i_blkbits;
|
|
|
|
|
|
|
|
|
|
ASSERT(mapping_size > 0);
|
|
|
|
|
if (mapping_size > size)
|
|
|
|
|
mapping_size = size;
|
|
|
|
|
if (offset < i_size_read(inode) &&
|
|
|
|
|
(xfs_ufsize_t)offset + mapping_size >= i_size_read(inode)) {
|
|
|
|
|
/* limit mapping to block that spans EOF */
|
|
|
|
|
mapping_size = roundup_64(i_size_read(inode) - offset,
|
|
|
|
|
i_blocksize(inode));
|
|
|
|
|
}
|
|
|
|
|
if (mapping_size > LONG_MAX)
|
|
|
|
|
mapping_size = LONG_MAX;
|
|
|
|
|
|
|
|
|
|
bh_result->b_size = mapping_size;
|
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
static int
|
|
|
|
|
xfs_get_blocks(
|
|
|
|
|
struct inode *inode,
|
|
|
|
|
sector_t iblock,
|
|
|
|
|
struct buffer_head *bh_result,
|
|
|
|
|
int create)
|
|
|
|
|
{
|
|
|
|
|
struct xfs_inode *ip = XFS_I(inode);
|
|
|
|
|
struct xfs_mount *mp = ip->i_mount;
|
|
|
|
|
xfs_fileoff_t offset_fsb, end_fsb;
|
|
|
|
|
int error = 0;
|
|
|
|
|
int lockmode = 0;
|
|
|
|
|
struct xfs_bmbt_irec imap;
|
|
|
|
|
int nimaps = 1;
|
|
|
|
|
xfs_off_t offset;
|
|
|
|
|
ssize_t size;
|
|
|
|
|
|
|
|
|
|
BUG_ON(create);
|
|
|
|
|
|
|
|
|
|
if (XFS_FORCED_SHUTDOWN(mp))
|
|
|
|
|
return -EIO;
|
|
|
|
|
|
|
|
|
|
offset = (xfs_off_t)iblock << inode->i_blkbits;
|
|
|
|
|
ASSERT(bh_result->b_size >= i_blocksize(inode));
|
|
|
|
|
size = bh_result->b_size;
|
|
|
|
|
|
|
|
|
|
if (offset >= i_size_read(inode))
|
|
|
|
|
return 0;
|
|
|
|
|
|
|
|
|
|
/*
|
|
|
|
|
* Direct I/O is usually done on preallocated files, so try getting
|
|
|
|
|
* a block mapping without an exclusive lock first.
|
|
|
|
|
*/
|
|
|
|
|
lockmode = xfs_ilock_data_map_shared(ip);
|
|
|
|
|
|
|
|
|
|
ASSERT(offset <= mp->m_super->s_maxbytes);
|
|
|
|
|
if (offset > mp->m_super->s_maxbytes - size)
|
|
|
|
|
size = mp->m_super->s_maxbytes - offset;
|
|
|
|
|
end_fsb = XFS_B_TO_FSB(mp, (xfs_ufsize_t)offset + size);
|
|
|
|
|
offset_fsb = XFS_B_TO_FSBT(mp, offset);
|
|
|
|
|
|
|
|
|
|
error = xfs_bmapi_read(ip, offset_fsb, end_fsb - offset_fsb, &imap,
|
|
|
|
|
&nimaps, 0);
|
|
|
|
|
if (error)
|
|
|
|
|
goto out_unlock;
|
|
|
|
|
if (!nimaps) {
|
|
|
|
|
trace_xfs_get_blocks_notfound(ip, offset, size);
|
|
|
|
|
goto out_unlock;
|
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
trace_xfs_get_blocks_found(ip, offset, size,
|
|
|
|
|
imap.br_state == XFS_EXT_UNWRITTEN ?
|
|
|
|
|
XFS_IO_UNWRITTEN : XFS_IO_OVERWRITE, &imap);
|
|
|
|
|
xfs_iunlock(ip, lockmode);
|
|
|
|
|
|
|
|
|
|
/* trim mapping down to size requested */
|
|
|
|
|
xfs_map_trim_size(inode, iblock, bh_result, &imap, offset, size);
|
|
|
|
|
|
|
|
|
|
/*
|
|
|
|
|
* For unwritten extents do not report a disk address in the buffered
|
|
|
|
|
* read case (treat as if we're reading into a hole).
|
|
|
|
|
*/
|
|
|
|
|
if (xfs_bmap_is_real_extent(&imap))
|
|
|
|
|
xfs_map_buffer(inode, bh_result, &imap, offset);
|
|
|
|
|
|
|
|
|
|
/*
|
|
|
|
|
* If this is a realtime file, data may be on a different device.
|
|
|
|
|
* to that pointed to from the buffer_head b_bdev currently.
|
|
|
|
|
*/
|
|
|
|
|
bh_result->b_bdev = xfs_find_bdev_for_inode(inode);
|
|
|
|
|
return 0;
|
|
|
|
|
|
|
|
|
|
out_unlock:
|
|
|
|
|
xfs_iunlock(ip, lockmode);
|
|
|
|
|
return error;
|
|
|
|
|
return iomap_releasepage(page, gfp_mask);
|
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
STATIC sector_t
|
|
|
|
|
@ -1279,9 +963,7 @@ xfs_vm_readpage(
|
|
|
|
|
struct page *page)
|
|
|
|
|
{
|
|
|
|
|
trace_xfs_vm_readpage(page->mapping->host, 1);
|
|
|
|
|
if (i_blocksize(page->mapping->host) == PAGE_SIZE)
|
|
|
|
|
return iomap_readpage(page, &xfs_iomap_ops);
|
|
|
|
|
return mpage_readpage(page, xfs_get_blocks);
|
|
|
|
|
return iomap_readpage(page, &xfs_iomap_ops);
|
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
STATIC int
|
|
|
|
|
@ -1292,65 +974,7 @@ xfs_vm_readpages(
|
|
|
|
|
unsigned nr_pages)
|
|
|
|
|
{
|
|
|
|
|
trace_xfs_vm_readpages(mapping->host, nr_pages);
|
|
|
|
|
if (i_blocksize(mapping->host) == PAGE_SIZE)
|
|
|
|
|
return iomap_readpages(mapping, pages, nr_pages, &xfs_iomap_ops);
|
|
|
|
|
return mpage_readpages(mapping, pages, nr_pages, xfs_get_blocks);
|
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
/*
|
|
|
|
|
* This is basically a copy of __set_page_dirty_buffers() with one
|
|
|
|
|
* small tweak: buffers beyond EOF do not get marked dirty. If we mark them
|
|
|
|
|
* dirty, we'll never be able to clean them because we don't write buffers
|
|
|
|
|
* beyond EOF, and that means we can't invalidate pages that span EOF
|
|
|
|
|
* that have been marked dirty. Further, the dirty state can leak into
|
|
|
|
|
* the file interior if the file is extended, resulting in all sorts of
|
|
|
|
|
* bad things happening as the state does not match the underlying data.
|
|
|
|
|
*
|
|
|
|
|
* XXX: this really indicates that bufferheads in XFS need to die. Warts like
|
|
|
|
|
* this only exist because of bufferheads and how the generic code manages them.
|
|
|
|
|
*/
|
|
|
|
|
STATIC int
|
|
|
|
|
xfs_vm_set_page_dirty(
|
|
|
|
|
struct page *page)
|
|
|
|
|
{
|
|
|
|
|
struct address_space *mapping = page->mapping;
|
|
|
|
|
struct inode *inode = mapping->host;
|
|
|
|
|
loff_t end_offset;
|
|
|
|
|
loff_t offset;
|
|
|
|
|
int newly_dirty;
|
|
|
|
|
|
|
|
|
|
if (unlikely(!mapping))
|
|
|
|
|
return !TestSetPageDirty(page);
|
|
|
|
|
|
|
|
|
|
end_offset = i_size_read(inode);
|
|
|
|
|
offset = page_offset(page);
|
|
|
|
|
|
|
|
|
|
spin_lock(&mapping->private_lock);
|
|
|
|
|
if (page_has_buffers(page)) {
|
|
|
|
|
struct buffer_head *head = page_buffers(page);
|
|
|
|
|
struct buffer_head *bh = head;
|
|
|
|
|
|
|
|
|
|
do {
|
|
|
|
|
if (offset < end_offset)
|
|
|
|
|
set_buffer_dirty(bh);
|
|
|
|
|
bh = bh->b_this_page;
|
|
|
|
|
offset += i_blocksize(inode);
|
|
|
|
|
} while (bh != head);
|
|
|
|
|
}
|
|
|
|
|
/*
|
|
|
|
|
* Lock out page->mem_cgroup migration to keep PageDirty
|
|
|
|
|
* synchronized with per-memcg dirty page counters.
|
|
|
|
|
*/
|
|
|
|
|
lock_page_memcg(page);
|
|
|
|
|
newly_dirty = !TestSetPageDirty(page);
|
|
|
|
|
spin_unlock(&mapping->private_lock);
|
|
|
|
|
|
|
|
|
|
if (newly_dirty)
|
|
|
|
|
__set_page_dirty(page, mapping, 1);
|
|
|
|
|
unlock_page_memcg(page);
|
|
|
|
|
if (newly_dirty)
|
|
|
|
|
__mark_inode_dirty(mapping->host, I_DIRTY_PAGES);
|
|
|
|
|
return newly_dirty;
|
|
|
|
|
return iomap_readpages(mapping, pages, nr_pages, &xfs_iomap_ops);
|
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
static int
|
|
|
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@ -1368,13 +992,13 @@ const struct address_space_operations xfs_address_space_operations = {
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.readpages = xfs_vm_readpages,
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.writepage = xfs_vm_writepage,
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.writepages = xfs_vm_writepages,
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.set_page_dirty = xfs_vm_set_page_dirty,
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.set_page_dirty = iomap_set_page_dirty,
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.releasepage = xfs_vm_releasepage,
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.invalidatepage = xfs_vm_invalidatepage,
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.bmap = xfs_vm_bmap,
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.direct_IO = noop_direct_IO,
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.migratepage = buffer_migrate_page,
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.is_partially_uptodate = block_is_partially_uptodate,
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.migratepage = iomap_migrate_page,
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.is_partially_uptodate = iomap_is_partially_uptodate,
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.error_remove_page = generic_error_remove_page,
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.swap_activate = xfs_iomap_swapfile_activate,
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};
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