summaryrefslogtreecommitdiffstats
path: root/fs/xfs/xfs_buf.h
diff options
context:
space:
mode:
Diffstat (limited to 'fs/xfs/xfs_buf.h')
-rw-r--r--fs/xfs/xfs_buf.h20
1 files changed, 20 insertions, 0 deletions
diff --git a/fs/xfs/xfs_buf.h b/fs/xfs/xfs_buf.h
index 4eb89bd4ee73..8bfb974f0772 100644
--- a/fs/xfs/xfs_buf.h
+++ b/fs/xfs/xfs_buf.h
@@ -183,6 +183,26 @@ typedef struct xfs_buf {
unsigned int b_page_count; /* size of page array */
unsigned int b_offset; /* page offset in first page */
int b_error; /* error code on I/O */
+
+ /*
+ * async write failure retry count. Initialised to zero on the first
+ * failure, then when it exceeds the maximum configured without a
+ * success the write is considered to be failed permanently and the
+ * iodone handler will take appropriate action.
+ *
+ * For retry timeouts, we record the jiffie of the first failure. This
+ * means that we can change the retry timeout for buffers already under
+ * I/O and thus avoid getting stuck in a retry loop with a long timeout.
+ *
+ * last_error is used to ensure that we are getting repeated errors, not
+ * different errors. e.g. a block device might change ENOSPC to EIO when
+ * a failure timeout occurs, so we want to re-initialise the error
+ * retry behaviour appropriately when that happens.
+ */
+ int b_retries;
+ unsigned long b_first_retry_time; /* in jiffies */
+ int b_last_error;
+
const struct xfs_buf_ops *b_ops;
#ifdef XFS_BUF_LOCK_TRACKING