xnu-2050.7.9.tar.gz

[apple/xnu.git] / bsd / nfs / nfs_node.c

diff --git a/bsd/nfs/nfs_node.c b/bsd/nfs/nfs_node.c
index b3f2a47b9e669d8397bad62a94b526e67e4a8e4f..7fc9ddaef8c8eed4132aa73247b0fae0666a2170 100644 (file)
--- a/bsd/nfs/nfs_node.c
+++ b/bsd/nfs/nfs_node.c
@@ -76,6 +76,7 @@
 #include <sys/ubc.h>
 #include <sys/malloc.h>
 #include <sys/fcntl.h>
+#include <sys/time.h>
 
 #include <nfs/rpcv2.h>
 #include <nfs/nfsproto.h>
@@ -1177,3 +1178,36 @@ nfs_data_update_size(nfsnode_t np, int datalocked)
        FSDBG_BOT(272, np, np->n_flag, np->n_size, np->n_newsize);
 }
 
+#define DODEBUG 1
+int
+nfs_mount_is_dirty(mount_t mp)
+{
+       u_long i;
+       nfsnode_t np;
+#ifdef DODEBUG 
+       struct timeval now, then, diff;
+       u_long ncnt = 0;
+       microuptime(&now);
+#endif
+       lck_mtx_lock(nfs_node_hash_mutex);
+       for (i = 0; i <= nfsnodehash; i++) {
+               LIST_FOREACH(np, &nfsnodehashtbl[i], n_hash) {
+#ifdef DODEBUG
+                       ncnt++;
+#endif                 
+                       if (np->n_mount == mp && !LIST_EMPTY(&np->n_dirtyblkhd))
+                               goto out;
+               }
+       }
+out:
+       lck_mtx_unlock(nfs_node_hash_mutex);
+#ifdef DODEBUG
+       microuptime(&then);
+       timersub(&then, &now, &diff);
+       
+       printf("nfs_mount_is_dirty took %lld mics for %ld slots and %ld nodes return %d\n",
+              (uint64_t)diff.tv_sec * 1000000LL + diff.tv_usec, i, ncnt, (i <= nfsnodehash));
+#endif
+
+       return (i <=  nfsnodehash);
+}