[Qemu-devel] [PATCH] 9pfs: add xattrwalk_fid field in V9fsFidState struct

[Li Qiang <liq3ea@gmail.com>]

From: Li Qiang <liqiang6-s@360.cn>

Currently, 9pfs sets the fs.xattr.copied_len field in V9fsFidState
to -1 to indicate a xattr walk fid. As the fs.xattr.copied_len is also
used to account for copied bytes, this may cause confusion. This patch
add a bool variable to represent the xattr walk fid.

Signed-off-by: Li Qiang <liqiang6-s@360.cn>
---
 hw/9pfs/9p.c | 7 ++++---
 hw/9pfs/9p.h | 1 +
 2 files changed, 5 insertions(+), 3 deletions(-)

diff --git a/hw/9pfs/9p.c b/hw/9pfs/9p.c
index 8c7488f..9625296 100644
--- a/hw/9pfs/9p.c
+++ b/hw/9pfs/9p.c
@@ -325,7 +325,7 @@ static int v9fs_xattr_fid_clunk(V9fsPDU *pdu, V9fsFidState *fidp)
 {
     int retval = 0;
 
-    if (fidp->fs.xattr.copied_len == -1) {
+    if (fidp->xattrwalk_fid) {
         /* getxattr/listxattr fid */
         goto free_value;
     }
@@ -3181,7 +3181,7 @@ static void v9fs_xattrwalk(void *opaque)
          */
         xattr_fidp->fs.xattr.len = size;
         xattr_fidp->fid_type = P9_FID_XATTR;
-        xattr_fidp->fs.xattr.copied_len = -1;
+        xattr_fidp->xattrwalk_fid  = true;
         if (size) {
             xattr_fidp->fs.xattr.value = g_malloc(size);
             err = v9fs_co_llistxattr(pdu, &xattr_fidp->path,
@@ -3214,7 +3214,7 @@ static void v9fs_xattrwalk(void *opaque)
          */
         xattr_fidp->fs.xattr.len = size;
         xattr_fidp->fid_type = P9_FID_XATTR;
-        xattr_fidp->fs.xattr.copied_len = -1;
+        xattr_fidp->xattrwalk_fid  = true;
         if (size) {
             xattr_fidp->fs.xattr.value = g_malloc(size);
             err = v9fs_co_lgetxattr(pdu, &xattr_fidp->path,
@@ -3269,6 +3269,7 @@ static void v9fs_xattrcreate(void *opaque)
     /* Make the file fid point to xattr */
     xattr_fidp = file_fidp;
     xattr_fidp->fid_type = P9_FID_XATTR;
+    xattr_fidp->xattrwalk_fid  = false;
     xattr_fidp->fs.xattr.copied_len = 0;
     xattr_fidp->fs.xattr.len = size;
     xattr_fidp->fs.xattr.flags = flags;
diff --git a/hw/9pfs/9p.h b/hw/9pfs/9p.h
index 22198f6..7e1e70b 100644
--- a/hw/9pfs/9p.h
+++ b/hw/9pfs/9p.h
@@ -214,6 +214,7 @@ struct V9fsFidState
     uid_t uid;
     int ref;
     int clunked;
+    bool xattrwalk_fid;
     V9fsFidState *next;
     V9fsFidState *rclm_lst;
 };
-- 
1.8.3.1