HAMMER - Implement volume-list command

[dragonfly.git] / sys / vfs / hammer / hammer_volume.c

diff --git a/sys/vfs/hammer/hammer_volume.c b/sys/vfs/hammer/hammer_volume.c
index 212235f..323c31a 100644 (file)
--- a/sys/vfs/hammer/hammer_volume.c
+++ b/sys/vfs/hammer/hammer_volume.c
@@ -438,6 +438,40 @@ end:
 }
 
 
+int
+hammer_ioc_volume_list(hammer_transaction_t trans, hammer_inode_t ip,
+    struct hammer_ioc_volume_list *ioc)
+{
+       struct hammer_mount *hmp = trans->hmp;
+       hammer_volume_t volume;
+       int error = 0;
+       int i, cnt, len;
+
+       for (i = 0, cnt = 0; i < HAMMER_MAX_VOLUMES && cnt < ioc->nvols; i++) {
+               volume = hammer_get_volume(hmp, i, &error);
+               if (volume == NULL && error == ENOENT) {
+                       error = 0;
+                       continue;
+               }
+               KKASSERT(volume != NULL && error == 0);
+
+               len = strlen(volume->vol_name) + 1;
+               KKASSERT(len <= MAXPATHLEN);
+
+               error = copyout(volume->vol_name, ioc->vols[cnt].device_name,
+                               len);
+               if (error) {
+                       hammer_rel_volume(volume, 0);
+                       return (error);
+               }
+               cnt++;
+               hammer_rel_volume(volume, 0);
+       }
+       ioc->nvols = cnt;
+
+       return (error);
+}
+
 /*
  * Iterate over all usable L1 entries of the volume and
  * the corresponding L2 entries.