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[Qemu-devel] [PATCH 2/2] hw/9pfs: Don't return type from host in readdir


From: Aneesh Kumar K.V
Subject: [Qemu-devel] [PATCH 2/2] hw/9pfs: Don't return type from host in readdir on local 9p filesystem
Date: Thu, 4 Sep 2014 11:01:46 -0500

From: Bastian Blank <address@hidden>

When using mapped mode in 9pfs, readdir implementation
should not return file type in d_type from the host
readdir, instead, it should use the type stored in
the extended attributes.  Since d_type is optional
and reading ext attrs for every readdir is expensive,
it should be sufficient to just set d_type to DT_UNKNOWN,
so guest will know to look it up separately.

This is a -stable material.

Signed-off-by: Bastian Blank <address@hidden>
Signed-off-by: Michael Tokarev <address@hidden>
Signed-off-by: Aneesh Kumar K.V <address@hidden>
---
 hw/9pfs/virtio-9p-local.c | 5 ++++-
 1 file changed, 4 insertions(+), 1 deletion(-)

diff --git a/hw/9pfs/virtio-9p-local.c b/hw/9pfs/virtio-9p-local.c
index 2787ddbe1f5e..a183eee662b6 100644
--- a/hw/9pfs/virtio-9p-local.c
+++ b/hw/9pfs/virtio-9p-local.c
@@ -397,12 +397,15 @@ static int local_readdir_r(FsContext *ctx, 
V9fsFidOpenState *fs,
 
 again:
     ret = readdir_r(fs->dir, entry, result);
-    if (ctx->export_flags & V9FS_SM_MAPPED_FILE) {
+    if (ctx->export_flags & V9FS_SM_MAPPED) {
+        entry->d_type = DT_UNKNOWN;
+    } else if (ctx->export_flags & V9FS_SM_MAPPED_FILE) {
         if (!ret && *result != NULL &&
             !strcmp(entry->d_name, VIRTFS_META_DIR)) {
             /* skp the meta data directory */
             goto again;
         }
+        entry->d_type = DT_UNKNOWN;
     }
     return ret;
 }
-- 
1.9.1




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