Merge branch 'for-linus' of git://oss.sgi.com/xfs/xfs

[safe/jmp/linux-2.6] / fs / xfs / xfs_iget.c

diff --git a/fs/xfs/xfs_iget.c b/fs/xfs/xfs_iget.c
index f58e5e0..478e587 100644 (file)
--- a/fs/xfs/xfs_iget.c
+++ b/fs/xfs/xfs_iget.c
@@ -246,9 +246,6 @@ xfs_iget_cache_miss(
                goto out_destroy;
        }
 
-       if (lock_flags)
-               xfs_ilock(ip, lock_flags);
-
        /*
         * Preload the radix tree so we can insert safely under the
         * write spinlock. Note that we cannot sleep inside the preload
@@ -256,7 +253,16 @@ xfs_iget_cache_miss(
         */
        if (radix_tree_preload(GFP_KERNEL)) {
                error = EAGAIN;
-               goto out_unlock;
+               goto out_destroy;
+       }
+
+       /*
+        * Because the inode hasn't been added to the radix-tree yet it can't
+        * be found by another thread, so we can do the non-sleeping lock here.
+        */
+       if (lock_flags) {
+               if (!xfs_ilock_nowait(ip, lock_flags))
+                       BUG();
        }
 
        mask = ~(((XFS_INODE_CLUSTER_SIZE(mp) >> mp->m_sb.sb_inodelog)) - 1);
@@ -284,7 +290,6 @@ xfs_iget_cache_miss(
 out_preload_end:
        write_unlock(&pag->pag_ici_lock);
        radix_tree_preload_end();
-out_unlock:
        if (lock_flags)
                xfs_iunlock(ip, lock_flags);
 out_destroy:
@@ -362,7 +367,6 @@ again:
        }
        xfs_put_perag(mp, pag);
 
-       xfs_iflags_set(ip, XFS_IMODIFIED);
        *ipp = ip;
 
        ASSERT(ip->i_df.if_ext_max ==
@@ -806,3 +810,51 @@ xfs_isilocked(
 }
 #endif
 
+#ifdef XFS_INODE_TRACE
+
+#define KTRACE_ENTER(ip, vk, s, line, ra)                      \
+       ktrace_enter((ip)->i_trace,                             \
+/*  0 */               (void *)(__psint_t)(vk),                \
+/*  1 */               (void *)(s),                            \
+/*  2 */               (void *)(__psint_t) line,               \
+/*  3 */               (void *)(__psint_t)atomic_read(&VFS_I(ip)->i_count), \
+/*  4 */               (void *)(ra),                           \
+/*  5 */               NULL,                                   \
+/*  6 */               (void *)(__psint_t)current_cpu(),       \
+/*  7 */               (void *)(__psint_t)current_pid(),       \
+/*  8 */               (void *)__return_address,               \
+/*  9 */               NULL, NULL, NULL, NULL, NULL, NULL, NULL)
+
+/*
+ * Vnode tracing code.
+ */
+void
+_xfs_itrace_entry(xfs_inode_t *ip, const char *func, inst_t *ra)
+{
+       KTRACE_ENTER(ip, INODE_KTRACE_ENTRY, func, 0, ra);
+}
+
+void
+_xfs_itrace_exit(xfs_inode_t *ip, const char *func, inst_t *ra)
+{
+       KTRACE_ENTER(ip, INODE_KTRACE_EXIT, func, 0, ra);
+}
+
+void
+xfs_itrace_hold(xfs_inode_t *ip, char *file, int line, inst_t *ra)
+{
+       KTRACE_ENTER(ip, INODE_KTRACE_HOLD, file, line, ra);
+}
+
+void
+_xfs_itrace_ref(xfs_inode_t *ip, char *file, int line, inst_t *ra)
+{
+       KTRACE_ENTER(ip, INODE_KTRACE_REF, file, line, ra);
+}
+
+void
+xfs_itrace_rele(xfs_inode_t *ip, char *file, int line, inst_t *ra)
+{
+       KTRACE_ENTER(ip, INODE_KTRACE_RELE, file, line, ra);
+}
+#endif /* XFS_INODE_TRACE */