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Diffstat (limited to 'fs/xfs/xfs_inode_buf.c')
-rw-r--r--fs/xfs/xfs_inode_buf.c36
1 files changed, 33 insertions, 3 deletions
diff --git a/fs/xfs/xfs_inode_buf.c b/fs/xfs/xfs_inode_buf.c
index 38fe509827dd..e011d597f12f 100644
--- a/fs/xfs/xfs_inode_buf.c
+++ b/fs/xfs/xfs_inode_buf.c
@@ -61,9 +61,22 @@ xfs_inobp_check(
}
#endif
+/*
+ * If we are doing readahead on an inode buffer, we might be in log recovery
+ * reading an inode allocation buffer that hasn't yet been replayed, and hence
+ * has not had the inode cores stamped into it. Hence for readahead, the buffer
+ * may be potentially invalid.
+ *
+ * If the readahead buffer is invalid, we don't want to mark it with an error,
+ * but we do want to clear the DONE status of the buffer so that a followup read
+ * will re-read it from disk. This will ensure that we don't get an unnecessary
+ * warnings during log recovery and we don't get unnecssary panics on debug
+ * kernels.
+ */
static void
xfs_inode_buf_verify(
- struct xfs_buf *bp)
+ struct xfs_buf *bp,
+ bool readahead)
{
struct xfs_mount *mp = bp->b_target->bt_mount;
int i;
@@ -84,6 +97,11 @@ xfs_inode_buf_verify(
if (unlikely(XFS_TEST_ERROR(!di_ok, mp,
XFS_ERRTAG_ITOBP_INOTOBP,
XFS_RANDOM_ITOBP_INOTOBP))) {
+ if (readahead) {
+ bp->b_flags &= ~XBF_DONE;
+ return;
+ }
+
xfs_buf_ioerror(bp, EFSCORRUPTED);
XFS_CORRUPTION_ERROR(__func__, XFS_ERRLEVEL_HIGH,
mp, dip);
@@ -104,14 +122,21 @@ static void
xfs_inode_buf_read_verify(
struct xfs_buf *bp)
{
- xfs_inode_buf_verify(bp);
+ xfs_inode_buf_verify(bp, false);
+}
+
+static void
+xfs_inode_buf_readahead_verify(
+ struct xfs_buf *bp)
+{
+ xfs_inode_buf_verify(bp, true);
}
static void
xfs_inode_buf_write_verify(
struct xfs_buf *bp)
{
- xfs_inode_buf_verify(bp);
+ xfs_inode_buf_verify(bp, false);
}
const struct xfs_buf_ops xfs_inode_buf_ops = {
@@ -119,6 +144,11 @@ const struct xfs_buf_ops xfs_inode_buf_ops = {
.verify_write = xfs_inode_buf_write_verify,
};
+const struct xfs_buf_ops xfs_inode_buf_ra_ops = {
+ .verify_read = xfs_inode_buf_readahead_verify,
+ .verify_write = xfs_inode_buf_write_verify,
+};
+
/*
* This routine is called to map an inode to the buffer containing the on-disk