bp->b_map_count = map_count;
if (map_count == 1) {
- bp->b_maps = &bp->b_map;
+ bp->b_maps = &bp->__b_map;
return 0;
}
xfs_buf_free_maps(
struct xfs_buf *bp)
{
- if (bp->b_maps != &bp->b_map) {
+ if (bp->b_maps != &bp->__b_map) {
kmem_free(bp->b_maps);
bp->b_maps = NULL;
}
}
use_alloc_page:
- start = BBTOB(bp->b_map.bm_bn) >> PAGE_SHIFT;
- end = (BBTOB(bp->b_map.bm_bn + bp->b_length) + PAGE_SIZE - 1)
+ start = BBTOB(bp->b_maps[0].bm_bn) >> PAGE_SHIFT;
+ end = (BBTOB(bp->b_maps[0].bm_bn + bp->b_length) + PAGE_SIZE - 1)
>> PAGE_SHIFT;
page_count = end - start;
error = _xfs_buf_get_pages(bp, page_count, flags);
struct rb_node *parent;
xfs_buf_t *bp;
xfs_daddr_t blkno = map[0].bm_bn;
+ xfs_daddr_t eofs;
int numblks = 0;
int i;
ASSERT(!(numbytes < (1 << btp->bt_sshift)));
ASSERT(!(BBTOB(blkno) & (xfs_off_t)btp->bt_smask));
+ /*
+ * Corrupted block numbers can get through to here, unfortunately, so we
+ * have to check that the buffer falls within the filesystem bounds.
+ */
+ eofs = XFS_FSB_TO_BB(btp->bt_mount, btp->bt_mount->m_sb.sb_dblocks);
+ if (blkno >= eofs) {
+ /*
+ * XXX (dgc): we should really be returning EFSCORRUPTED here,
+ * but none of the higher level infrastructure supports
+ * returning a specific error on buffer lookup failures.
+ */
+ xfs_alert(btp->bt_mount,
+ "%s: Block out of range: block 0x%llx, EOFS 0x%llx ",
+ __func__, blkno, eofs);
+ return NULL;
+ }
+
/* get tree root */
pag = xfs_perag_get(btp->bt_mount,
xfs_daddr_to_agno(btp->bt_mount, blkno));
xfs_buf_flags_t flags)
{
ASSERT(!(flags & XBF_WRITE));
- ASSERT(bp->b_map.bm_bn != XFS_BUF_DADDR_NULL);
+ ASSERT(bp->b_maps[0].bm_bn != XFS_BUF_DADDR_NULL);
bp->b_flags &= ~(XBF_WRITE | XBF_ASYNC | XBF_READ_AHEAD);
bp->b_flags |= flags & (XBF_READ | XBF_ASYNC | XBF_READ_AHEAD);
struct xfs_buf *bp = container_of(b, struct xfs_buf, b_list);
xfs_daddr_t diff;
- diff = ap->b_map.bm_bn - bp->b_map.bm_bn;
+ diff = ap->b_maps[0].bm_bn - bp->b_maps[0].bm_bn;
if (diff < 0)
return -1;
if (diff > 0)