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xfs: reuse _xfs_buf_read for re-reading the superblock 

Instead of poking deeply into buffer cache internals when re-reading the
superblock during log recovery just generalize _xfs_buf_read and use it
there.  Note that we don't have to explicitly set up the ops as they
must be set from the initial read.

Signed-off-by: Christoph Hellwig <hch@lst.de>
Reviewed-by: Darrick J. Wong <darrick.wong@oracle.com>
Signed-off-by: Darrick J. Wong <darrick.wong@oracle.com>
pull/193/head
Christoph Hellwig 2020-09-01 10:55:47 -07:00 committed by Darrick J. Wong
parent b3f8e08ca8
commit 26e328759b
3 changed files with 14 additions and 18 deletions
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15
fs/xfs/xfs_buf.c
View File

@ -52,6 +52,15 @@ static kmem_zone_t *xfs_buf_zone;
* b_lock (trylock due to inversion)
*/
static int __xfs_buf_submit(struct xfs_buf *bp, bool wait);
static inline int
xfs_buf_submit(
struct xfs_buf *bp)
{
return __xfs_buf_submit(bp, !(bp->b_flags & XBF_ASYNC));
}
static inline int
xfs_buf_is_vmapped(
struct xfs_buf *bp)
@ -751,7 +760,7 @@ found:
return 0;
}
STATIC int
int
_xfs_buf_read(
xfs_buf_t *bp,
xfs_buf_flags_t flags)
@ -759,7 +768,7 @@ _xfs_buf_read(
ASSERT(!(flags & XBF_WRITE));
ASSERT(bp->b_maps[0].bm_bn != XFS_BUF_DADDR_NULL);
bp->b_flags &= ~(XBF_WRITE | XBF_ASYNC | XBF_READ_AHEAD);
bp->b_flags &= ~(XBF_WRITE | XBF_ASYNC | XBF_READ_AHEAD | XBF_DONE);
bp->b_flags |= flags & (XBF_READ | XBF_ASYNC | XBF_READ_AHEAD);
return xfs_buf_submit(bp);
@ -1639,7 +1648,7 @@ xfs_buf_iowait(
* safe to reference the buffer after a call to this function unless the caller
* holds an additional reference itself.
*/
int
static int
__xfs_buf_submit(
struct xfs_buf *bp,
bool wait)

9
fs/xfs/xfs_buf.h
View File

@ -249,6 +249,7 @@ int xfs_buf_get_uncached(struct xfs_buftarg *target, size_t numblks, int flags,
int xfs_buf_read_uncached(struct xfs_buftarg *target, xfs_daddr_t daddr,
size_t numblks, int flags, struct xfs_buf **bpp,
const struct xfs_buf_ops *ops);
int _xfs_buf_read(struct xfs_buf *bp, xfs_buf_flags_t flags);
void xfs_buf_hold(struct xfs_buf *bp);
/* Releasing Buffers */
@ -275,14 +276,6 @@ extern void __xfs_buf_ioerror(struct xfs_buf *bp, int error,
#define xfs_buf_ioerror(bp, err) __xfs_buf_ioerror((bp), (err), __this_address)
extern void xfs_buf_ioerror_alert(struct xfs_buf *bp, xfs_failaddr_t fa);
void xfs_buf_ioend_fail(struct xfs_buf *);
extern int __xfs_buf_submit(struct xfs_buf *bp, bool);
static inline int xfs_buf_submit(struct xfs_buf *bp)
{
bool wait = bp->b_flags & XBF_ASYNC ? false : true;
return __xfs_buf_submit(bp, wait);
}
void xfs_buf_zero(struct xfs_buf *bp, size_t boff, size_t bsize);
void __xfs_buf_mark_corrupt(struct xfs_buf *bp, xfs_failaddr_t fa);
#define xfs_buf_mark_corrupt(bp) __xfs_buf_mark_corrupt((bp), __this_address)

8
fs/xfs/xfs_log_recover.c
View File

@ -3309,13 +3309,7 @@ xlog_do_recover(
*/
xfs_buf_lock(bp);
xfs_buf_hold(bp);
ASSERT(bp->b_flags & XBF_DONE);
bp->b_flags &= ~(XBF_DONE | XBF_ASYNC);
ASSERT(!(bp->b_flags & XBF_WRITE));
bp->b_flags |= XBF_READ;
bp->b_ops = &xfs_sb_buf_ops;
error = xfs_buf_submit(bp);
error = _xfs_buf_read(bp, XBF_READ);
if (error) {
if (!XFS_FORCED_SHUTDOWN(mp)) {
xfs_buf_ioerror_alert(bp, __this_address);