Commit 78f69467 authored by Pali Rohár's avatar Pali Rohár Committed by Steve French
Browse files

cifs: Add mount option -o reparse=none 



This new mount option allows to completely disable creating new reparse
points. When -o sfu or -o mfsymlinks or -o symlink= is not specified then
creating any special file (fifo, socket, symlink, block and char) will fail
with -EOPNOTSUPP error.

Signed-off-by: default avatarPali Rohár <pali@kernel.org>
Signed-off-by: default avatarSteve French <stfrench@microsoft.com>
parent 660618dd

fs/smb/client/cifsglob.h

+3 −0
Original line number Diff line number Diff line
@@ -160,6 +160,7 @@ enum upcall_target_enum { 
};



enum cifs_reparse_type {

	CIFS_REPARSE_TYPE_NONE,

	CIFS_REPARSE_TYPE_NFS,

	CIFS_REPARSE_TYPE_WSL,

	CIFS_REPARSE_TYPE_DEFAULT = CIFS_REPARSE_TYPE_NFS,
@@ -168,6 +169,8 @@ enum cifs_reparse_type { 
static inline const char *cifs_reparse_type_str(enum cifs_reparse_type type)

{

	switch (type) {

	case CIFS_REPARSE_TYPE_NONE:

		return "none";

	case CIFS_REPARSE_TYPE_NFS:

		return "nfs";

	case CIFS_REPARSE_TYPE_WSL:

fs/smb/client/fs_context.c

+7 −1
Original line number Diff line number Diff line
@@ -334,6 +334,7 @@ cifs_parse_cache_flavor(struct fs_context *fc, char *value, struct smb3_fs_conte 


static const match_table_t reparse_flavor_tokens = {

	{ Opt_reparse_default,	"default" },

	{ Opt_reparse_none,	"none" },

	{ Opt_reparse_nfs,	"nfs" },

	{ Opt_reparse_wsl,	"wsl" },

	{ Opt_reparse_err,	NULL },
@@ -348,6 +349,9 @@ static int parse_reparse_flavor(struct fs_context *fc, char *value, 
	case Opt_reparse_default:

		ctx->reparse_type = CIFS_REPARSE_TYPE_DEFAULT;

		break;

	case Opt_reparse_none:

		ctx->reparse_type = CIFS_REPARSE_TYPE_NONE;

		break;

	case Opt_reparse_nfs:

		ctx->reparse_type = CIFS_REPARSE_TYPE_NFS;

		break;
@@ -1828,8 +1832,10 @@ enum cifs_symlink_type get_cifs_symlink_type(struct cifs_sb_info *cifs_sb) 
			return CIFS_SYMLINK_TYPE_SFU;

		else if (cifs_sb->ctx->linux_ext && !cifs_sb->ctx->no_linux_ext)

			return CIFS_SYMLINK_TYPE_UNIX;

		else

		else if (cifs_sb->ctx->reparse_type != CIFS_REPARSE_TYPE_NONE)

			return CIFS_SYMLINK_TYPE_NATIVE;

		else

			return CIFS_SYMLINK_TYPE_NONE;

	} else {

		return cifs_sb->ctx->symlink_type;

	}

fs/smb/client/fs_context.h

+1 −0
Original line number Diff line number Diff line
@@ -43,6 +43,7 @@ enum { 


enum cifs_reparse_parm {

	Opt_reparse_default,

	Opt_reparse_none,

	Opt_reparse_nfs,

	Opt_reparse_wsl,

	Opt_reparse_err