virtio-9p: Implement TXATTRWALK

TXATTRWALK: Descend a ATTR namespace

 size[4] TXATTRWALK tag[2] fid[4] newfid[4] name[s]
 size[4] RXATTRWALK tag[2] size[8]

txattrwalk gets a fid pointing to xattr. This fid can later be
used to get read the xattr value. If name is NULL the fid returned
can be used to get the list of extended attribute associated to
the file system object.

Signed-off-by: Aneesh Kumar K.V <aneesh.kumar@linux.vnet.ibm.com>

1 files changed, 14 insertions, 0 deletions

diff --git a/hw/virtio-9p.h b/hw/virtio-9p.h
index faca6b2e94..005df49290 100644
--- a/hw/virtio-9p.h
+++ b/hw/virtio-9p.h
@@ -29,6 +29,8 @@ enum {
     P9_RGETATTR,
     P9_TSETATTR = 26,
     P9_RSETATTR,
+    P9_TXATTRWALK = 30,
+    P9_RXATTRWALK,
     P9_TREADDIR = 40,
     P9_RREADDIR,
     P9_TLINK = 70,
@@ -416,6 +418,18 @@ typedef struct V9fsRenameState {
     V9fsString name;
 } V9fsRenameState;
 
+typedef struct V9fsXattrState
+{
+    V9fsPDU *pdu;
+    size_t offset;
+    V9fsFidState *file_fidp;
+    V9fsFidState *xattr_fidp;
+    V9fsString name;
+    int64_t size;
+    int flags;
+    void *value;
+} V9fsXattrState;
+
 extern size_t pdu_packunpack(void *addr, struct iovec *sg, int sg_count,
                             size_t offset, size_t size, int pack);