[PATCH 6/9] xfs: kill xfs_bioerror_relse

Dave Chinner
2014-08-15T06:39:16Z

From: Dave Chinner <dchinner@redhat.com>

There is only one caller now - xfs_trans_read_buf_map() - and it has
very well defined call semantics - read, synchronous, and b_iodone
is NULL. Hence it's pretty clear what error handling is necessary
for this case. The bigger problem of untangling
xfs_trans_read_buf_map error handling is left to a future patch.

Signed-off-by: Dave Chinner <dchinner@redhat.com>
---
fs/xfs/xfs_buf.c | 39 ---------------------------------------
fs/xfs/xfs_buf.h | 2 --
fs/xfs/xfs_trans_buf.c | 8 +++++---
3 files changed, 5 insertions(+), 44 deletions(-)

diff --git a/fs/xfs/xfs_buf.c b/fs/xfs/xfs_buf.c
index f444285..352e9219 100644
--- a/fs/xfs/xfs_buf.c
+++ b/fs/xfs/xfs_buf.c
@@ -1071,45 +1071,6 @@ xfs_buf_ioerror_alert(
(__uint64_t)XFS_BUF_ADDR(bp), func, -bp->b_error, bp->b_length);
}

-/*
- * Same as xfs_bioerror, except that we are releasing the buffer
- * here ourselves, and avoiding the xfs_buf_ioend call.
- * This is meant for userdata errors; metadata bufs come with
- * iodone functions attached, so that we can track down errors.
- */
-int
-xfs_bioerror_relse(
- struct xfs_buf *bp)
-{
- int64_t fl = bp->b_flags;
- /*
- * No need to wait until the buffer is unpinned.
- * We aren't flushing it.
- *
- * chunkhold expects B_DONE to be set, whether
- * we actually finish the I/O or not. We don't want to
- * change that interface.
- */
- XFS_BUF_UNREAD(bp);
- XFS_BUF_DONE(bp);
- xfs_buf_stale(bp);
- bp->b_iodone = NULL;
- if (!(fl & XBF_ASYNC)) {
- /*
- * Mark b_error and B_ERROR _both_.
- * Lot's of chunkcache code assumes that.
- * There's no reason to mark error for
- * ASYNC buffers.
- */
- xfs_buf_ioerror(bp, -EIO);
- complete(&bp->b_iowait);
- } else {
- xfs_buf_relse(bp);
- }
-
- return -EIO;
-}
-
int
xfs_bwrite(
struct xfs_buf *bp)
diff --git a/fs/xfs/xfs_buf.h b/fs/xfs/xfs_buf.h
index 44db8cd..d8f57f6 100644
--- a/fs/xfs/xfs_buf.h
+++ b/fs/xfs/xfs_buf.h
@@ -297,8 +297,6 @@ extern void xfs_buf_iomove(xfs_buf_t *, size_t, size_t, void *,
#define xfs_buf_zero(bp, off, len) \
xfs_buf_iomove((bp), (off), (len), NULL, XBRW_ZERO)

-extern int xfs_bioerror_relse(struct xfs_buf *);
-
/* Buffer Utility Routines */
extern xfs_caddr_t xfs_buf_offset(xfs_buf_t *, size_t);

diff --git a/fs/xfs/xfs_trans_buf.c b/fs/xfs/xfs_trans_buf.c
index 96c898e..758c07d 100644
--- a/fs/xfs/xfs_trans_buf.c
+++ b/fs/xfs/xfs_trans_buf.c
@@ -324,11 +324,13 @@ xfs_trans_read_buf_map(
*/
if (XFS_FORCED_SHUTDOWN(mp)) {
trace_xfs_bdstrat_shut(bp, _RET_IP_);
- xfs_bioerror_relse(bp);
- } else {
- xfs_buf_iorequest(bp);
+ bp->b_flags &= ~(XBF_READ | XBF_DONE);
+ xfs_buf_ioerror(bp, -EIO);
+ xfs_buf_stale(bp);
+ return -EIO;
}

+ xfs_buf_iorequest(bp);
error = xfs_buf_iowait(bp);
if (error) {
xfs_buf_ioerror_alert(bp, __func__);
--
2.0.0