diff options
| -rw-r--r-- | fs/xfs/linux-2.6/xfs_aops.c | 91 |
1 files changed, 34 insertions, 57 deletions
diff --git a/fs/xfs/linux-2.6/xfs_aops.c b/fs/xfs/linux-2.6/xfs_aops.c index 64c909e5c1e5..98d26c8e0565 100644 --- a/fs/xfs/linux-2.6/xfs_aops.c +++ b/fs/xfs/linux-2.6/xfs_aops.c @@ -806,7 +806,8 @@ xfs_page_state_convert( unsigned int type; __uint64_t end_offset; pgoff_t end_index, last_index, tlast; - int flags, len, err, iomap_valid = 0, uptodate = 1; + ssize_t size, len; + int flags, err, iomap_valid = 0, uptodate = 1; int page_dirty, count = 0, trylock_flag = 0; /* wait for other IO threads? */ @@ -875,21 +876,36 @@ xfs_page_state_convert( * * Second case, allocate space for a delalloc buffer. * We can return EAGAIN here in the release page case. - */ - if (buffer_unwritten(bh) || buffer_delay(bh)) { + * + * Third case, an unmapped buffer was found, and we are + * in a path where we need to write the whole page out. + */ + if (buffer_unwritten(bh) || buffer_delay(bh) || + ((buffer_uptodate(bh) || PageUptodate(page)) && + !buffer_mapped(bh) && (unmapped || startio))) { if (buffer_unwritten(bh)) { type = IOMAP_UNWRITTEN; flags = BMAPI_WRITE|BMAPI_IGNSTATE; - } else { + } else if (buffer_delay(bh)) { type = IOMAP_DELAY; flags = BMAPI_ALLOCATE; if (!startio) flags |= trylock_flag; + } else { + type = 0; + flags = BMAPI_WRITE|BMAPI_MMAP; } if (!iomap_valid) { - err = xfs_map_blocks(inode, offset, len, &iomap, - flags); + if (type == 0) { + size = xfs_probe_unmapped_cluster(inode, + page, bh, head); + } else { + size = len; + } + + err = xfs_map_blocks(inode, offset, size, + &iomap, flags); if (err) goto error; iomap_valid = xfs_iomap_valid(&iomap, offset); @@ -909,61 +925,22 @@ xfs_page_state_convert( page_dirty--; count++; } - } else if ((buffer_uptodate(bh) || PageUptodate(page)) && - (unmapped || startio)) { - + } else if (buffer_uptodate(bh) && startio) { type = 0; - if (!buffer_mapped(bh)) { - - /* - * Getting here implies an unmapped buffer - * was found, and we are in a path where we - * need to write the whole page out. - */ - if (!iomap_valid) { - int size; - - size = xfs_probe_unmapped_cluster( - inode, page, bh, head); - err = xfs_map_blocks(inode, offset, - size, &iomap, - BMAPI_WRITE|BMAPI_MMAP); - if (err) - goto error; - iomap_valid = xfs_iomap_valid(&iomap, - offset); - } - if (iomap_valid) { - xfs_map_at_offset(bh, offset, - inode->i_blkbits, - &iomap); - if (startio) { - xfs_add_to_ioend(inode, - bh, p_offset, type, - &ioend, !iomap_valid); - } else { - set_buffer_dirty(bh); - unlock_buffer(bh); - mark_buffer_dirty(bh); - } - page_dirty--; - count++; - } - } else if (startio) { - if (buffer_uptodate(bh) && - !test_and_set_bit(BH_Lock, &bh->b_state)) { - ASSERT(buffer_mapped(bh)); - xfs_add_to_ioend(inode, - bh, p_offset, type, - &ioend, !iomap_valid); - page_dirty--; - count++; - } else { - iomap_valid = 0; - } + + if (!test_and_set_bit(BH_Lock, &bh->b_state)) { + ASSERT(buffer_mapped(bh)); + xfs_add_to_ioend(inode, + bh, p_offset, type, + &ioend, !iomap_valid); + page_dirty--; + count++; } else { iomap_valid = 0; } + } else if ((buffer_uptodate(bh) || PageUptodate(page)) && + (unmapped || startio)) { + iomap_valid = 0; } if (!iohead) |