From 1e02c945fbf54f2b9179ab84794a05cffb3efd98 Mon Sep 17 00:00:00 2001
From: Michal Sekletar <msekleta@redhat.com>
Date: Tue, 12 Dec 2017 20:00:31 +0100
Subject: [PATCH] cryptsetup: use more descriptive name for the variable and
 drop redundant function

Let's rename escaped_name to disk_path since this is an actual content
that pointer refers to. It is either path to encrypted block device
or path to encrypted image file.

Also drop redundant function disk_major_minor(). src is always set, and
it always points to either encrypted block device path (or symlink to
such device) or to encrypted image. In case it is set to device path
there is no need to reset it to /dev/block/major:minor symlink since
those paths are equivalent.

(cherry-picked from commit ea7e7c1e9c3b579ee94a11a192f1013ee4cb829e)

Related: #1511043
---
 src/cryptsetup/cryptsetup.c | 41 ++++++++-----------------------------
 1 file changed, 8 insertions(+), 33 deletions(-)

diff --git a/src/cryptsetup/cryptsetup.c b/src/cryptsetup/cryptsetup.c
index c57d2b2948..69a0156144 100644
--- a/src/cryptsetup/cryptsetup.c
+++ b/src/cryptsetup/cryptsetup.c
@@ -217,23 +217,6 @@ static void log_glue(int level, const char *msg, void *usrptr) {
         log_debug("%s", msg);
 }
 
-static int disk_major_minor(const char *path, char **ret) {
-        struct stat st;
-
-        assert(path);
-
-        if (stat(path, &st) < 0)
-                return -errno;
-
-        if (!S_ISBLK(st.st_mode))
-                return -EINVAL;
-
-        if (asprintf(ret, "/dev/block/%d:%d", major(st.st_rdev), minor(st.st_rdev)) < 0)
-                return -errno;
-
-        return 0;
-}
-
 static char* disk_description(const char *path) {
 
         static const char name_fields[] =
@@ -299,11 +282,11 @@ static int get_password(const char *vol, const char *src, usec_t until, bool acc
         int r = 0;
         char **p;
         _cleanup_free_ char *text = NULL;
-        _cleanup_free_ char *escaped_name = NULL;
+        _cleanup_free_ char *disk_path = NULL;
         char *id;
         const char *name = NULL;
         _cleanup_free_ char *description = NULL, *name_buffer = NULL,
-                *mount_point = NULL, *maj_min = NULL;
+                *mount_point = NULL;
 
         assert(vol);
         assert(src);
@@ -312,6 +295,10 @@ static int get_password(const char *vol, const char *src, usec_t until, bool acc
         description = disk_description(src);
         mount_point = disk_mount_point(vol);
 
+        disk_path = cescape(src);
+        if (!disk_path)
+                return log_oom();
+
         if (description && streq(vol, description)) {
                 /* If the description string is simply the
                  * volume name, then let's not show this
@@ -335,19 +322,7 @@ static int get_password(const char *vol, const char *src, usec_t until, bool acc
         if (asprintf(&text, "Please enter passphrase for disk %s!", name) < 0)
                 return log_oom();
 
-        if (src)
-                (void) disk_major_minor(src, &maj_min);
-
-        if (maj_min) {
-                escaped_name = maj_min;
-                maj_min = NULL;
-        } else
-                escaped_name = cescape(src);
-
-        if (!escaped_name)
-                return log_oom();
-
-        id = strjoina("cryptsetup:", escaped_name);
+        id = strjoina("cryptsetup:", disk_path);
 
         r = ask_password_auto(text, "drive-harddisk", id, until, accept_cached, passwords);
         if (r < 0)
@@ -361,7 +336,7 @@ static int get_password(const char *vol, const char *src, usec_t until, bool acc
                 if (asprintf(&text, "Please enter passphrase for disk %s! (verification)", name) < 0)
                         return log_oom();
 
-                id = strjoina("cryptsetup-verification:", escaped_name);
+                id = strjoina("cryptsetup-verification:", disk_path);
 
                 r = ask_password_auto(text, "drive-harddisk", id, until, false, &passwords2);
                 if (r < 0)