diff options
Diffstat (limited to 'fs/xfs/xfs_buf.c')
| -rw-r--r-- | fs/xfs/xfs_buf.c | 18 |
1 files changed, 16 insertions, 2 deletions
diff --git a/fs/xfs/xfs_buf.c b/fs/xfs/xfs_buf.c index da14658da310..4db6e8d780f6 100644 --- a/fs/xfs/xfs_buf.c +++ b/fs/xfs/xfs_buf.c @@ -42,6 +42,8 @@ #include "xfs_mount.h" #include "xfs_trace.h" #include "xfs_log.h" +#include "xfs_errortag.h" +#include "xfs_error.h" static kmem_zone_t *xfs_buf_zone; @@ -1258,8 +1260,6 @@ xfs_buf_ioapply_map( int size; int offset; - total_nr_pages = bp->b_page_count; - /* skip the pages in the buffer before the start offset */ page_index = 0; offset = *buf_offset; @@ -2131,3 +2131,17 @@ xfs_buf_terminate(void) { kmem_zone_destroy(xfs_buf_zone); } + +void xfs_buf_set_ref(struct xfs_buf *bp, int lru_ref) +{ + /* + * Set the lru reference count to 0 based on the error injection tag. + * This allows userspace to disrupt buffer caching for debug/testing + * purposes. + */ + if (XFS_TEST_ERROR(false, bp->b_target->bt_mount, + XFS_ERRTAG_BUF_LRU_REF)) + lru_ref = 0; + + atomic_set(&bp->b_lru_ref, lru_ref); +} |