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-rw-r--r--fs/xfs/xfs_trans_buf.c184
1 files changed, 46 insertions, 138 deletions
diff --git a/fs/xfs/xfs_trans_buf.c b/fs/xfs/xfs_trans_buf.c
index 4e1b6892c10..9cd809025f3 100644
--- a/fs/xfs/xfs_trans_buf.c
+++ b/fs/xfs/xfs_trans_buf.c
@@ -40,11 +40,51 @@
#include "xfs_rw.h"
#include "xfs_trace.h"
+/*
+ * Check to see if a buffer matching the given parameters is already
+ * a part of the given transaction.
+ */
+STATIC struct xfs_buf *
+xfs_trans_buf_item_match(
+ struct xfs_trans *tp,
+ struct xfs_buftarg *target,
+ xfs_daddr_t blkno,
+ int len)
+{
+ xfs_log_item_chunk_t *licp;
+ xfs_log_item_desc_t *lidp;
+ xfs_buf_log_item_t *blip;
+ int i;
-STATIC xfs_buf_t *xfs_trans_buf_item_match(xfs_trans_t *, xfs_buftarg_t *,
- xfs_daddr_t, int);
-STATIC xfs_buf_t *xfs_trans_buf_item_match_all(xfs_trans_t *, xfs_buftarg_t *,
- xfs_daddr_t, int);
+ len = BBTOB(len);
+ for (licp = &tp->t_items; licp != NULL; licp = licp->lic_next) {
+ if (xfs_lic_are_all_free(licp)) {
+ ASSERT(licp == &tp->t_items);
+ ASSERT(licp->lic_next == NULL);
+ return NULL;
+ }
+
+ for (i = 0; i < licp->lic_unused; i++) {
+ /*
+ * Skip unoccupied slots.
+ */
+ if (xfs_lic_isfree(licp, i))
+ continue;
+
+ lidp = xfs_lic_slot(licp, i);
+ blip = (xfs_buf_log_item_t *)lidp->lid_item;
+ if (blip->bli_item.li_type != XFS_LI_BUF)
+ continue;
+
+ if (XFS_BUF_TARGET(blip->bli_buf) == target &&
+ XFS_BUF_ADDR(blip->bli_buf) == blkno &&
+ XFS_BUF_COUNT(blip->bli_buf) == len)
+ return blip->bli_buf;
+ }
+ }
+
+ return NULL;
+}
/*
* Add the locked buffer to the transaction.
@@ -112,14 +152,6 @@ xfs_trans_bjoin(
* within the transaction, just increment its lock recursion count
* and return a pointer to it.
*
- * Use the fast path function xfs_trans_buf_item_match() or the buffer
- * cache routine incore_match() to find the buffer
- * if it is already owned by this transaction.
- *
- * If we don't already own the buffer, use get_buf() to get it.
- * If it doesn't yet have an associated xfs_buf_log_item structure,
- * then allocate one and add the item to this transaction.
- *
* If the transaction pointer is NULL, make this just a normal
* get_buf() call.
*/
@@ -149,11 +181,7 @@ xfs_trans_get_buf(xfs_trans_t *tp,
* have it locked. In this case we just increment the lock
* recursion count and return the buffer to the caller.
*/
- if (tp->t_items.lic_next == NULL) {
- bp = xfs_trans_buf_item_match(tp, target_dev, blkno, len);
- } else {
- bp = xfs_trans_buf_item_match_all(tp, target_dev, blkno, len);
- }
+ bp = xfs_trans_buf_item_match(tp, target_dev, blkno, len);
if (bp != NULL) {
ASSERT(XFS_BUF_VALUSEMA(bp) <= 0);
if (XFS_FORCED_SHUTDOWN(tp->t_mountp))
@@ -259,14 +287,6 @@ int xfs_error_mod = 33;
* within the transaction and already read in, just increment its
* lock recursion count and return a pointer to it.
*
- * Use the fast path function xfs_trans_buf_item_match() or the buffer
- * cache routine incore_match() to find the buffer
- * if it is already owned by this transaction.
- *
- * If we don't already own the buffer, use read_buf() to get it.
- * If it doesn't yet have an associated xfs_buf_log_item structure,
- * then allocate one and add the item to this transaction.
- *
* If the transaction pointer is NULL, make this just a normal
* read_buf() call.
*/
@@ -328,11 +348,7 @@ xfs_trans_read_buf(
* If the buffer is not yet read in, then we read it in, increment
* the lock recursion count, and return it to the caller.
*/
- if (tp->t_items.lic_next == NULL) {
- bp = xfs_trans_buf_item_match(tp, target, blkno, len);
- } else {
- bp = xfs_trans_buf_item_match_all(tp, target, blkno, len);
- }
+ bp = xfs_trans_buf_item_match(tp, target, blkno, len);
if (bp != NULL) {
ASSERT(XFS_BUF_VALUSEMA(bp) <= 0);
ASSERT(XFS_BUF_FSPRIVATE2(bp, xfs_trans_t *) == tp);
@@ -901,111 +917,3 @@ xfs_trans_dquot_buf(
bip->bli_format.blf_flags |= type;
}
-
-/*
- * Check to see if a buffer matching the given parameters is already
- * a part of the given transaction. Only check the first, embedded
- * chunk, since we don't want to spend all day scanning large transactions.
- */
-STATIC xfs_buf_t *
-xfs_trans_buf_item_match(
- xfs_trans_t *tp,
- xfs_buftarg_t *target,
- xfs_daddr_t blkno,
- int len)
-{
- xfs_log_item_chunk_t *licp;
- xfs_log_item_desc_t *lidp;
- xfs_buf_log_item_t *blip;
- xfs_buf_t *bp;
- int i;
-
- bp = NULL;
- len = BBTOB(len);
- licp = &tp->t_items;
- if (!xfs_lic_are_all_free(licp)) {
- for (i = 0; i < licp->lic_unused; i++) {
- /*
- * Skip unoccupied slots.
- */
- if (xfs_lic_isfree(licp, i)) {
- continue;
- }
-
- lidp = xfs_lic_slot(licp, i);
- blip = (xfs_buf_log_item_t *)lidp->lid_item;
- if (blip->bli_item.li_type != XFS_LI_BUF) {
- continue;
- }
-
- bp = blip->bli_buf;
- if ((XFS_BUF_TARGET(bp) == target) &&
- (XFS_BUF_ADDR(bp) == blkno) &&
- (XFS_BUF_COUNT(bp) == len)) {
- /*
- * We found it. Break out and
- * return the pointer to the buffer.
- */
- break;
- } else {
- bp = NULL;
- }
- }
- }
- return bp;
-}
-
-/*
- * Check to see if a buffer matching the given parameters is already
- * a part of the given transaction. Check all the chunks, we
- * want to be thorough.
- */
-STATIC xfs_buf_t *
-xfs_trans_buf_item_match_all(
- xfs_trans_t *tp,
- xfs_buftarg_t *target,
- xfs_daddr_t blkno,
- int len)
-{
- xfs_log_item_chunk_t *licp;
- xfs_log_item_desc_t *lidp;
- xfs_buf_log_item_t *blip;
- xfs_buf_t *bp;
- int i;
-
- bp = NULL;
- len = BBTOB(len);
- for (licp = &tp->t_items; licp != NULL; licp = licp->lic_next) {
- if (xfs_lic_are_all_free(licp)) {
- ASSERT(licp == &tp->t_items);
- ASSERT(licp->lic_next == NULL);
- return NULL;
- }
- for (i = 0; i < licp->lic_unused; i++) {
- /*
- * Skip unoccupied slots.
- */
- if (xfs_lic_isfree(licp, i)) {
- continue;
- }
-
- lidp = xfs_lic_slot(licp, i);
- blip = (xfs_buf_log_item_t *)lidp->lid_item;
- if (blip->bli_item.li_type != XFS_LI_BUF) {
- continue;
- }
-
- bp = blip->bli_buf;
- if ((XFS_BUF_TARGET(bp) == target) &&
- (XFS_BUF_ADDR(bp) == blkno) &&
- (XFS_BUF_COUNT(bp) == len)) {
- /*
- * We found it. Break out and
- * return the pointer to the buffer.
- */
- return bp;
- }
- }
- }
- return NULL;
-}
generated by cgit v1.2.3-18-g5258 (git 2.32.0) at 2024-11-26 04:35:50 +0000