- Apply the same naming rules of LVM names as done in the LVM code itself.

PR:		kern/135874

1 files changed, 27 insertions, 16 deletions

diff --git a/sys/geom/linux_lvm/g_linux_lvm.c b/sys/geom/linux_lvm/g_linux_lvm.c
index 5f0db7a..d210611 100644
--- a/sys/geom/linux_lvm/g_linux_lvm.c
+++ b/sys/geom/linux_lvm/g_linux_lvm.c
@@ -826,14 +826,6 @@ llvm_md_decode(const u_char *data, struct g_llvm_metadata *md,
 	return (0);
 }
 
-#define	GRAB_NAME(tok, name, len)					\
-	len = 0;							\
-	while (tok[len] && (isalpha(tok[len]) || isdigit(tok[len])) &&	\
-	    len < G_LLVM_NAMELEN - 1)					\
-		len++;							\
-	bcopy(tok, name, len);						\
-	name[len] = '\0';
-
 #define	GRAB_INT(key, tok1, tok2, v)					\
 	if (tok1 && tok2 && strncmp(tok1, key, sizeof(key)) == 0) {	\
 		v = strtol(tok2, &tok1, 10);				\
@@ -864,6 +856,27 @@ llvm_md_decode(const u_char *data, struct g_llvm_metadata *md,
 			break;						\
 		}
 
+static size_t 
+llvm_grab_name(char *name, const char *tok)
+{
+	size_t len;
+
+	len = 0;
+	if (tok == NULL)
+		return (0);
+	if (tok[0] == '-')
+		return (0);
+	if (strcmp(tok, ".") == 0 || strcmp(tok, "..") == 0)
+		return (0);
+	while (tok[len] && (isalpha(tok[len]) || isdigit(tok[len]) ||
+	    tok[len] == '.' || tok[len] == '_' || tok[len] == '-' ||
+	    tok[len] == '+') && len < G_LLVM_NAMELEN - 1)
+		len++;
+	bcopy(tok, name, len);
+	name[len] = '\0';
+	return (len);
+}
+
 static int
 llvm_textconf_decode(u_char *data, int buflen, struct g_llvm_metadata *md)
 {
@@ -872,7 +885,7 @@ llvm_textconf_decode(u_char *data, int buflen, struct g_llvm_metadata *md)
 	char *tok, *v;
 	char name[G_LLVM_NAMELEN];
 	char uuid[G_LLVM_UUIDLEN];
-	int len;
+	size_t len;
 
 	if (buf == NULL || *buf == '\0')
 		return (EINVAL);
@@ -880,7 +893,7 @@ llvm_textconf_decode(u_char *data, int buflen, struct g_llvm_metadata *md)
 	tok = strsep(&buf, "\n");
 	if (tok == NULL)
 		return (EINVAL);
-	GRAB_NAME(tok, name, len);
+	len = llvm_grab_name(name, tok);
 	if (len == 0)
 		return (EINVAL);
 
@@ -970,7 +983,7 @@ llvm_textconf_decode_pv(char **buf, char *tok, struct g_llvm_vg *vg)
 {
 	struct g_llvm_pv	*pv;
 	char *v;
-	int len;
+	size_t len;
 
 	if (*buf == NULL || **buf == '\0')
 		return (EINVAL);
@@ -983,7 +996,7 @@ llvm_textconf_decode_pv(char **buf, char *tok, struct g_llvm_vg *vg)
 	len = 0;
 	if (tok == NULL)
 		goto bad;
-	GRAB_NAME(tok, pv->pv_name, len);
+	len = llvm_grab_name(pv->pv_name, tok);
 	if (len == 0)
 		goto bad;
 
@@ -1024,7 +1037,7 @@ llvm_textconf_decode_lv(char **buf, char *tok, struct g_llvm_vg *vg)
 	struct g_llvm_lv	*lv;
 	struct g_llvm_segment *sg;
 	char *v;
-	int len;
+	size_t len;
 
 	if (*buf == NULL || **buf == '\0')
 		return (EINVAL);
@@ -1036,10 +1049,9 @@ llvm_textconf_decode_lv(char **buf, char *tok, struct g_llvm_vg *vg)
 	lv->lv_vg = vg;
 	LIST_INIT(&lv->lv_segs);
 
-	len = 0;
 	if (tok == NULL)
 		goto bad;
-	GRAB_NAME(tok, lv->lv_name, len);
+	len = llvm_grab_name(lv->lv_name, tok);
 	if (len == 0)
 		goto bad;
 
@@ -1162,7 +1174,6 @@ bad:
 	free(sg, M_GLLVM);
 	return (-1);
 }
-#undef	GRAB_NAME
 #undef	GRAB_INT
 #undef	GRAB_STR
 #undef	SPLIT