9p: Be robust against paths without FS_IOC_GETVERSION

Submitted by Gabriel de Perthuis on May 8, 2013, 11:33 p.m.

Details

Message ID 518AE0D5.9010307@gmail.com
State New
Headers show

Commit Message

Gabriel de Perthuis May 8, 2013, 11:33 p.m.
The current implementation checked for supported filesystems at mount
time, but actual support depends on the path.  Don't error out when
finding unversioned paths.

This fix allows booting a linux kernel with the same / filesystem as the
host; otherwise the boot fails when mounting devtmpfs.

Signed-off-by: Gabriel de Perthuis <g2p.code@gmail.com>
---
 hw/9pfs/cofile.c | 4 ++++
 1 file changed, 4 insertions(+)

Patch hide | download patch | download mbox

diff --git a/hw/9pfs/cofile.c b/hw/9pfs/cofile.c
index 2efebf3..194c130 100644
--- a/hw/9pfs/cofile.c
+++ b/hw/9pfs/cofile.c
@@ -36,10 +36,14 @@  int v9fs_co_st_gen(V9fsPDU *pdu, V9fsPath *path, mode_t st_mode,
                     err = -errno;
                 }
             });
         v9fs_path_unlock(s);
     }
+    /* The ioctl may not be supported depending on the path */
+    if (err == -ENOTTY) {
+        err = 0;
+    }
     return err;
 }
 
 int v9fs_co_lstat(V9fsPDU *pdu, V9fsPath *path, struct stat *stbuf)
 {