XFS: add some tracing calls in the read/write path

Modid: 2.5.x-xfs:slinx:129126a

diff --git a/fs/xfs/linux/xfs_lrw.c b/fs/xfs/linux/xfs_lrw.c
index faf5fc7ba018ae53e2b063a173d55d7445ff73b8..d1e92fbb052382a06fb33bbe341de7203c5f6c55 100644 (file)
--- a/fs/xfs/linux/xfs_lrw.c
+++ b/fs/xfs/linux/xfs_lrw.c
@@ -136,11 +136,14 @@ xfs_read(
        xfs_fsize_t             n;
        xfs_inode_t             *ip;
        xfs_mount_t             *mp;
+       vnode_t                 *vp;
        unsigned long           seg;
        int                     direct = filp->f_flags & O_DIRECT;
 
        ip = XFS_BHVTOI(bdp);
+       vp = BHV_TO_VNODE(bdp);
        mp = ip->i_mount;
+       vn_trace_entry(vp, "xfs_read", (inst_t *)__return_address);
 
        XFS_STATS_INC(xfsstats.xs_read_calls);
 
@@ -194,7 +197,7 @@ xfs_read(
 
        xfs_ilock(ip, XFS_IOLOCK_SHARED);
 
-       if (DM_EVENT_ENABLED(BHV_TO_VNODE(bdp)->v_vfsp, ip, DM_EVENT_READ) &&
+       if (DM_EVENT_ENABLED(vp->v_vfsp, ip, DM_EVENT_READ) &&
            !(filp->f_mode & FINVIS)) {
                int error;
                vrwlock_t locktype = VRWLOCK_READ;
@@ -469,6 +472,7 @@ xfs_write(
        XFS_STATS_INC(xfsstats.xs_write_calls);
 
        vp = BHV_TO_VNODE(bdp);
+       vn_trace_entry(vp, "xfs_write", (inst_t *)__return_address);
        xip = XFS_BHVTOI(bdp);
 
        /* START copy & waste from filemap.c */
@@ -877,6 +881,8 @@ xfs_strategy(bhv_desc_t *bdp,
        xfs_trans_t     *tp;
 
        ip = XFS_BHVTOI(bdp);
+       vn_trace_entry(BHV_TO_VNODE(bdp), "xfs_strategy",
+                                       (inst_t *)__return_address);
        io = &ip->i_iocore;
        mp = ip->i_mount;
        /* is_xfs = IO_IS_XFS(io); */