Changeset d2c8533 in mainline for uspace/srv/vfs/vfs_ops.c

Timestamp:

2017-05-08T20:38:47Z (8 years ago)

Author:

Jiri Svoboda <jiri@…>

Branches:

lfn, master, serial, ticket/834-toolchain-update, topic/msim-upgrade, topic/simplify-dev-export

Children:

f066a87

Parents:

582a0b8

Message:

File system probing groundwork. Only MFS can do it for now.

File:

• uspace/srv/vfs/vfs_ops.c (modified) (1 diff)

uspace/srv/vfs/vfs_ops.c

@@ -190 +190 @@
 }
 
+int vfs_op_fsprobe(const char *fs_name, service_id_t sid,
+    vfs_fs_probe_info_t *info)
+{
+        fs_handle_t fs_handle = 0;
+        sysarg_t rc;
+        int retval;
+        
+        fibril_mutex_lock(&fs_list_lock);
+        fs_handle = fs_name_to_handle(0, fs_name, false);
+        fibril_mutex_unlock(&fs_list_lock);
+        
+        if (fs_handle == 0)
+                return ENOFS;
+        
+        /* Send probe request to the file system server */
+        ipc_call_t answer;
+        async_exch_t *exch = vfs_exchange_grab(fs_handle);
+        aid_t msg = async_send_1(exch, VFS_OUT_FSPROBE, (sysarg_t) sid,
+            &answer);
+        if (msg == 0)
+                return EINVAL;
+        
+        /* Read probe information */
+        retval = async_data_read_start(exch, info, sizeof(*info));
+        if (retval != EOK) {
+                async_forget(msg);
+                return retval;
+        }
+        
+        async_wait_for(msg, &rc);
+        vfs_exchange_release(exch);
+        return rc;
+}
+
 int vfs_op_mount(int mpfd, unsigned service_id, unsigned flags,
     unsigned instance, const char *opts, const char *fs_name, int *outfd)