fs/9p: Add hardlink support to .u extension
For regular file and directories we put the link
count in th extension field in a tagged string format.
Signed-off-by: Aneesh Kumar K.V <aneesh.kumar@linux.vnet.ibm.com>
Signed-off-by: Eric Van Hensbergen <ericvh@gmail.com>
diff --git a/fs/9p/vfs_inode.c b/fs/9p/vfs_inode.c
index d3d3c3c..5fe45d6 100644
--- a/fs/9p/vfs_inode.c
+++ b/fs/9p/vfs_inode.c
@@ -887,6 +887,8 @@
struct super_block *sb)
{
char ext[32];
+ char tag_name[14];
+ unsigned int i_nlink;
struct v9fs_session_info *v9ses = sb->s_fs_info;
inode->i_nlink = 1;
@@ -902,7 +904,22 @@
inode->i_uid = stat->n_uid;
inode->i_gid = stat->n_gid;
}
-
+ if ((S_ISREG(inode->i_mode)) || (S_ISDIR(inode->i_mode))) {
+ if (v9fs_proto_dotu(v9ses) && (stat->extension[0] != '\0')) {
+ /*
+ * Hadlink support got added later to
+ * to the .u extension. So there can be
+ * server out there that doesn't support
+ * this even with .u extension. So check
+ * for non NULL stat->extension
+ */
+ strncpy(ext, stat->extension, sizeof(ext));
+ /* HARDLINKCOUNT %u */
+ sscanf(ext, "%13s %u", tag_name, &i_nlink);
+ if (!strncmp(tag_name, "HARDLINKCOUNT", 13))
+ inode->i_nlink = i_nlink;
+ }
+ }
inode->i_mode = p9mode2unixmode(v9ses, stat->mode);
if ((S_ISBLK(inode->i_mode)) || (S_ISCHR(inode->i_mode))) {
char type = 0;