Add a custom VOP_PATHCONF method for fuse.

This method handles _PC_FILESIZEBITS, _PC_SYMLINK_MAX, and _PC_NO_TRUNC.
For other values it defers to vop_stdpathconf().

MFC after:	1 month
Sponsored by:	Chelsio Communications

1 files changed, 21 insertions, 1 deletions

diff --git a/sys/fs/fuse/fuse_vnops.c b/sys/fs/fuse/fuse_vnops.c
index dd78ac8d055a..1c10ca939842 100644
--- a/sys/fs/fuse/fuse_vnops.c
+++ b/sys/fs/fuse/fuse_vnops.c
@@ -126,6 +126,7 @@ static vop_lookup_t fuse_vnop_lookup;
 static vop_mkdir_t fuse_vnop_mkdir;
 static vop_mknod_t fuse_vnop_mknod;
 static vop_open_t fuse_vnop_open;
+static vop_pathconf_t fuse_vnop_pathconf;
 static vop_read_t fuse_vnop_read;
 static vop_readdir_t fuse_vnop_readdir;
 static vop_readlink_t fuse_vnop_readlink;
@@ -158,7 +159,7 @@ struct vop_vector fuse_vnops = {
 	.vop_mkdir = fuse_vnop_mkdir,
 	.vop_mknod = fuse_vnop_mknod,
 	.vop_open = fuse_vnop_open,
-	.vop_pathconf = vop_stdpathconf,
+	.vop_pathconf = fuse_vnop_pathconf,
 	.vop_read = fuse_vnop_read,
 	.vop_readdir = fuse_vnop_readdir,
 	.vop_readlink = fuse_vnop_readlink,
@@ -1175,6 +1176,25 @@ fuse_vnop_open(struct vop_open_args *ap)
 	return error;
 }
 
+static int
+fuse_vnop_pathconf(struct vop_pathconf_args *ap)
+{
+
+	switch (ap->a_name) {
+	case _PC_FILESIZEBITS:
+		*ap->a_retval = 64;
+		return (0);
+	case _PC_SYMLINK_MAX:
+		*ap->a_retval = MAXPATHLEN;
+		return (0);
+	case _PC_NO_TRUNC:
+		*ap->a_retval = 1;
+		return (0);
+	default:
+		return (vop_stdpathconf(ap));
+	}
+}
+
 /*
     struct vnop_read_args {
 	struct vnode *a_vp;