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[PATCH 05/11] xfs: add a proper transaction pointer to struct xfs_buf

To: xfs@xxxxxxxxxxx
Subject: [PATCH 05/11] xfs: add a proper transaction pointer to struct xfs_buf
From: Christoph Hellwig <hch@xxxxxxxxxxxxx>
Date: Sun, 10 Jul 2011 16:49:21 -0400
References: <20110710204916.856267100@xxxxxxxxxxxxxxxxxxxxxx>
User-agent: quilt/0.48-1
Replace the typeless b_fspriv2 and the ugly macros around it with a properly
typed transaction pointer.

Signed-off-by: Christoph Hellwig <hch@xxxxxx>

Index: xfs/fs/xfs/linux-2.6/xfs_buf.h
===================================================================
--- xfs.orig/fs/xfs/linux-2.6/xfs_buf.h 2011-07-01 11:35:50.000000000 +0200
+++ xfs/fs/xfs/linux-2.6/xfs_buf.h      2011-07-01 11:43:33.737416011 +0200
@@ -149,7 +149,7 @@ typedef struct xfs_buf {
        xfs_buf_iodone_t        b_iodone;       /* I/O completion function */
        struct completion       b_iowait;       /* queue for I/O waiters */
        void                    *b_fspriv;
-       void                    *b_fspriv2;
+       struct xfs_trans        *b_transp;
        struct page             **b_pages;      /* array of page pointers */
        struct page             *b_page_array[XB_PAGES]; /* inline pages */
        unsigned long           b_queuetime;    /* time buffer was queued */
@@ -282,8 +282,6 @@ void xfs_buf_stale(struct xfs_buf *bp);
 
 #define XFS_BUF_FSPRIVATE(bp, type)            ((type)(bp)->b_fspriv)
 #define XFS_BUF_SET_FSPRIVATE(bp, val)         ((bp)->b_fspriv = (void*)(val))
-#define XFS_BUF_FSPRIVATE2(bp, type)           ((type)(bp)->b_fspriv2)
-#define XFS_BUF_SET_FSPRIVATE2(bp, val)                ((bp)->b_fspriv2 = 
(void*)(val))
 #define XFS_BUF_SET_START(bp)                  do { } while (0)
 
 #define XFS_BUF_PTR(bp)                        (xfs_caddr_t)((bp)->b_addr)
Index: xfs/fs/xfs/xfs_buf_item.c
===================================================================
--- xfs.orig/fs/xfs/xfs_buf_item.c      2011-07-01 11:35:50.000000000 +0200
+++ xfs/fs/xfs/xfs_buf_item.c   2011-07-01 11:43:33.737416011 +0200
@@ -443,7 +443,7 @@ xfs_buf_item_unpin(
                         * Since the transaction no longer refers to the buffer,
                         * the buffer should no longer refer to the transaction.
                         */
-                       XFS_BUF_SET_FSPRIVATE2(bp, NULL);
+                       bp->b_transp = NULL;
                }
 
                /*
@@ -525,7 +525,7 @@ xfs_buf_item_unlock(
        uint                    hold;
 
        /* Clear the buffer's association with this transaction. */
-       XFS_BUF_SET_FSPRIVATE2(bp, NULL);
+       bp->b_transp = NULL;
 
        /*
         * If this is a transaction abort, don't return early.  Instead, allow
Index: xfs/fs/xfs/xfs_log.c
===================================================================
--- xfs.orig/fs/xfs/xfs_log.c   2011-07-01 11:35:51.000000000 +0200
+++ xfs/fs/xfs/xfs_log.c        2011-07-01 11:43:33.740749344 +0200
@@ -876,8 +876,6 @@ xlog_iodone(xfs_buf_t *bp)
        int             aborted;
 
        iclog = XFS_BUF_FSPRIVATE(bp, xlog_in_core_t *);
-       ASSERT(XFS_BUF_FSPRIVATE2(bp, unsigned long) == (unsigned long) 2);
-       XFS_BUF_SET_FSPRIVATE2(bp, (unsigned long)1);
        aborted = 0;
        l = iclog->ic_log;
 
@@ -1057,7 +1055,6 @@ xlog_alloc_log(xfs_mount_t        *mp,
        if (!bp)
                goto out_free_log;
        XFS_BUF_SET_IODONE_FUNC(bp, xlog_iodone);
-       XFS_BUF_SET_FSPRIVATE2(bp, (unsigned long)1);
        ASSERT(XFS_BUF_ISBUSY(bp));
        ASSERT(xfs_buf_islocked(bp));
        log->l_xbuf = bp;
@@ -1092,7 +1089,6 @@ xlog_alloc_log(xfs_mount_t        *mp,
                        goto out_free_iclog;
 
                XFS_BUF_SET_IODONE_FUNC(bp, xlog_iodone);
-               XFS_BUF_SET_FSPRIVATE2(bp, (unsigned long)1);
                iclog->ic_bp = bp;
                iclog->ic_data = bp->b_addr;
 #ifdef DEBUG
@@ -1349,8 +1345,6 @@ xlog_sync(xlog_t          *log,
        }
 
        bp = iclog->ic_bp;
-       ASSERT(XFS_BUF_FSPRIVATE2(bp, unsigned long) == (unsigned long)1);
-       XFS_BUF_SET_FSPRIVATE2(bp, (unsigned long)2);
        XFS_BUF_SET_ADDR(bp, BLOCK_LSN(be64_to_cpu(iclog->ic_header.h_lsn)));
 
        XFS_STATS_ADD(xs_log_blocks, BTOBB(count));
@@ -1408,9 +1402,6 @@ xlog_sync(xlog_t          *log,
        }
        if (split) {
                bp = iclog->ic_log->l_xbuf;
-               ASSERT(XFS_BUF_FSPRIVATE2(bp, unsigned long) ==
-                                                       (unsigned long)1);
-               XFS_BUF_SET_FSPRIVATE2(bp, (unsigned long)2);
                XFS_BUF_SET_ADDR(bp, 0);             /* logical 0 */
                XFS_BUF_SET_PTR(bp, 
(xfs_caddr_t)((__psint_t)&(iclog->ic_header)+
                                            (__psint_t)count), split);
Index: xfs/fs/xfs/xfs_trans_buf.c
===================================================================
--- xfs.orig/fs/xfs/xfs_trans_buf.c     2011-07-01 11:35:50.000000000 +0200
+++ xfs/fs/xfs/xfs_trans_buf.c  2011-07-01 11:44:04.924082291 +0200
@@ -81,7 +81,7 @@ _xfs_trans_bjoin(
        struct xfs_buf_log_item *bip;
 
        ASSERT(XFS_BUF_ISBUSY(bp));
-       ASSERT(XFS_BUF_FSPRIVATE2(bp, void *) == NULL);
+       ASSERT(bp->b_transp == NULL);
 
        /*
         * The xfs_buf_log_item pointer is stored in b_fsprivate.  If
@@ -110,7 +110,7 @@ _xfs_trans_bjoin(
         * Initialize b_fsprivate2 so we can find it with incore_match()
         * in xfs_trans_get_buf() and friends above.
         */
-       XFS_BUF_SET_FSPRIVATE2(bp, tp);
+       bp->b_transp = tp;
 
 }
 
@@ -172,7 +172,7 @@ xfs_trans_get_buf(xfs_trans_t       *tp,
                else if (XFS_BUF_ISSTALE(bp))
                        ASSERT(!XFS_BUF_ISDELAYWRITE(bp));
 
-               ASSERT(XFS_BUF_FSPRIVATE2(bp, xfs_trans_t *) == tp);
+               ASSERT(bp->b_transp == tp);
                bip = XFS_BUF_FSPRIVATE(bp, xfs_buf_log_item_t *);
                ASSERT(bip != NULL);
                ASSERT(atomic_read(&bip->bli_refcount) > 0);
@@ -232,7 +232,7 @@ xfs_trans_getsb(xfs_trans_t *tp,
         * recursion count and return the buffer to the caller.
         */
        bp = mp->m_sb_bp;
-       if (XFS_BUF_FSPRIVATE2(bp, xfs_trans_t *) == tp) {
+       if (bp->b_transp == tp) {
                bip = XFS_BUF_FSPRIVATE(bp, xfs_buf_log_item_t*);
                ASSERT(bip != NULL);
                ASSERT(atomic_read(&bip->bli_refcount) > 0);
@@ -328,7 +328,7 @@ xfs_trans_read_buf(
        bp = xfs_trans_buf_item_match(tp, target, blkno, len);
        if (bp != NULL) {
                ASSERT(xfs_buf_islocked(bp));
-               ASSERT(XFS_BUF_FSPRIVATE2(bp, xfs_trans_t *) == tp);
+               ASSERT(bp->b_transp == tp);
                ASSERT(XFS_BUF_FSPRIVATE(bp, void *) != NULL);
                ASSERT((XFS_BUF_ISERROR(bp)) == 0);
                if (!(XFS_BUF_ISDONE(bp))) {
@@ -466,7 +466,7 @@ xfs_trans_brelse(xfs_trans_t        *tp,
         * Default to a normal brelse() call if the tp is NULL.
         */
        if (tp == NULL) {
-               ASSERT(XFS_BUF_FSPRIVATE2(bp, void *) == NULL);
+               ASSERT(bp->b_transp == NULL);
                /*
                 * If there's a buf log item attached to the buffer,
                 * then let the AIL know that the buffer is being
@@ -484,7 +484,7 @@ xfs_trans_brelse(xfs_trans_t        *tp,
                return;
        }
 
-       ASSERT(XFS_BUF_FSPRIVATE2(bp, xfs_trans_t *) == tp);
+       ASSERT(bp->b_transp == tp);
        bip = XFS_BUF_FSPRIVATE(bp, xfs_buf_log_item_t *);
        ASSERT(bip->bli_item.li_type == XFS_LI_BUF);
        ASSERT(!(bip->bli_flags & XFS_BLI_STALE));
@@ -556,7 +556,7 @@ xfs_trans_brelse(xfs_trans_t        *tp,
                xfs_buf_item_relse(bp);
                bip = NULL;
        }
-       XFS_BUF_SET_FSPRIVATE2(bp, NULL);
+       bp->b_transp = NULL;
 
        /*
         * If we've still got a buf log item on the buffer, then
@@ -584,7 +584,7 @@ xfs_trans_bhold(xfs_trans_t *tp,
        xfs_buf_log_item_t      *bip;
 
        ASSERT(XFS_BUF_ISBUSY(bp));
-       ASSERT(XFS_BUF_FSPRIVATE2(bp, xfs_trans_t *) == tp);
+       ASSERT(bp->b_transp == tp);
        ASSERT(XFS_BUF_FSPRIVATE(bp, void *) != NULL);
 
        bip = XFS_BUF_FSPRIVATE(bp, xfs_buf_log_item_t *);
@@ -606,7 +606,7 @@ xfs_trans_bhold_release(xfs_trans_t *tp,
        xfs_buf_log_item_t      *bip;
 
        ASSERT(XFS_BUF_ISBUSY(bp));
-       ASSERT(XFS_BUF_FSPRIVATE2(bp, xfs_trans_t *) == tp);
+       ASSERT(bp->b_transp == tp);
        ASSERT(XFS_BUF_FSPRIVATE(bp, void *) != NULL);
 
        bip = XFS_BUF_FSPRIVATE(bp, xfs_buf_log_item_t *);
@@ -637,7 +637,7 @@ xfs_trans_log_buf(xfs_trans_t       *tp,
        xfs_buf_log_item_t      *bip;
 
        ASSERT(XFS_BUF_ISBUSY(bp));
-       ASSERT(XFS_BUF_FSPRIVATE2(bp, xfs_trans_t *) == tp);
+       ASSERT(bp->b_transp == tp);
        ASSERT(XFS_BUF_FSPRIVATE(bp, void *) != NULL);
        ASSERT((first <= last) && (last < XFS_BUF_COUNT(bp)));
        ASSERT((XFS_BUF_IODONE_FUNC(bp) == NULL) ||
@@ -709,7 +709,7 @@ xfs_trans_binval(
        xfs_buf_log_item_t      *bip;
 
        ASSERT(XFS_BUF_ISBUSY(bp));
-       ASSERT(XFS_BUF_FSPRIVATE2(bp, xfs_trans_t *) == tp);
+       ASSERT(bp->b_transp == tp);
        ASSERT(XFS_BUF_FSPRIVATE(bp, void *) != NULL);
 
        bip = XFS_BUF_FSPRIVATE(bp, xfs_buf_log_item_t *);
@@ -783,7 +783,7 @@ xfs_trans_inode_buf(
        xfs_buf_log_item_t      *bip;
 
        ASSERT(XFS_BUF_ISBUSY(bp));
-       ASSERT(XFS_BUF_FSPRIVATE2(bp, xfs_trans_t *) == tp);
+       ASSERT(bp->b_transp == tp);
        ASSERT(XFS_BUF_FSPRIVATE(bp, void *) != NULL);
 
        bip = XFS_BUF_FSPRIVATE(bp, xfs_buf_log_item_t *);
@@ -809,7 +809,7 @@ xfs_trans_stale_inode_buf(
        xfs_buf_log_item_t      *bip;
 
        ASSERT(XFS_BUF_ISBUSY(bp));
-       ASSERT(XFS_BUF_FSPRIVATE2(bp, xfs_trans_t *) == tp);
+       ASSERT(bp->b_transp == tp);
        ASSERT(XFS_BUF_FSPRIVATE(bp, void *) != NULL);
 
        bip = XFS_BUF_FSPRIVATE(bp, xfs_buf_log_item_t *);
@@ -836,7 +836,7 @@ xfs_trans_inode_alloc_buf(
        xfs_buf_log_item_t      *bip;
 
        ASSERT(XFS_BUF_ISBUSY(bp));
-       ASSERT(XFS_BUF_FSPRIVATE2(bp, xfs_trans_t *) == tp);
+       ASSERT(bp->b_transp == tp);
        ASSERT(XFS_BUF_FSPRIVATE(bp, void *) != NULL);
 
        bip = XFS_BUF_FSPRIVATE(bp, xfs_buf_log_item_t *);
@@ -866,7 +866,7 @@ xfs_trans_dquot_buf(
        xfs_buf_log_item_t      *bip;
 
        ASSERT(XFS_BUF_ISBUSY(bp));
-       ASSERT(XFS_BUF_FSPRIVATE2(bp, xfs_trans_t *) == tp);
+       ASSERT(bp->b_transp == tp);
        ASSERT(XFS_BUF_FSPRIVATE(bp, void *) != NULL);
        ASSERT(type == XFS_BLF_UDQUOT_BUF ||
               type == XFS_BLF_PDQUOT_BUF ||

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