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From 1e02c945fbf54f2b9179ab84794a05cffb3efd98 Mon Sep 17 00:00:00 2001
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From: Michal Sekletar <msekleta@redhat.com>
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Date: Tue, 12 Dec 2017 20:00:31 +0100
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Subject: [PATCH] cryptsetup: use more descriptive name for the variable and
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 drop redundant function
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Let's rename escaped_name to disk_path since this is an actual content
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that pointer refers to. It is either path to encrypted block device
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or path to encrypted image file.
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Also drop redundant function disk_major_minor(). src is always set, and
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it always points to either encrypted block device path (or symlink to
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such device) or to encrypted image. In case it is set to device path
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there is no need to reset it to /dev/block/major:minor symlink since
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those paths are equivalent.
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(cherry-picked from commit ea7e7c1e9c3b579ee94a11a192f1013ee4cb829e)
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Related: #1511043
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---
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 src/cryptsetup/cryptsetup.c | 41 ++++++++---------------------------------
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 1 file changed, 8 insertions(+), 33 deletions(-)
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diff --git a/src/cryptsetup/cryptsetup.c b/src/cryptsetup/cryptsetup.c
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index c57d2b294..69a015614 100644
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--- a/src/cryptsetup/cryptsetup.c
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+++ b/src/cryptsetup/cryptsetup.c
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@@ -217,23 +217,6 @@ static void log_glue(int level, const char *msg, void *usrptr) {
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         log_debug("%s", msg);
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 }
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-static int disk_major_minor(const char *path, char **ret) {
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-        struct stat st;
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-
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-        assert(path);
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-
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-        if (stat(path, &st) < 0)
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-                return -errno;
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-
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-        if (!S_ISBLK(st.st_mode))
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-                return -EINVAL;
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-
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-        if (asprintf(ret, "/dev/block/%d:%d", major(st.st_rdev), minor(st.st_rdev)) < 0)
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-                return -errno;
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-
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-        return 0;
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-}
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-
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 static char* disk_description(const char *path) {
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         static const char name_fields[] =
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@@ -299,11 +282,11 @@ static int get_password(const char *vol, const char *src, usec_t until, bool acc
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         int r = 0;
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         char **p;
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         _cleanup_free_ char *text = NULL;
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-        _cleanup_free_ char *escaped_name = NULL;
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+        _cleanup_free_ char *disk_path = NULL;
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         char *id;
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         const char *name = NULL;
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         _cleanup_free_ char *description = NULL, *name_buffer = NULL,
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-                *mount_point = NULL, *maj_min = NULL;
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+                *mount_point = NULL;
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         assert(vol);
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         assert(src);
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@@ -312,6 +295,10 @@ static int get_password(const char *vol, const char *src, usec_t until, bool acc
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         description = disk_description(src);
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         mount_point = disk_mount_point(vol);
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+        disk_path = cescape(src);
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+        if (!disk_path)
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+                return log_oom();
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+
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         if (description && streq(vol, description)) {
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                 /* If the description string is simply the
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                  * volume name, then let's not show this
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@@ -335,19 +322,7 @@ static int get_password(const char *vol, const char *src, usec_t until, bool acc
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         if (asprintf(&text, "Please enter passphrase for disk %s!", name) < 0)
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                 return log_oom();
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-        if (src)
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-                (void) disk_major_minor(src, &maj_min);
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-
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-        if (maj_min) {
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-                escaped_name = maj_min;
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-                maj_min = NULL;
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-        } else
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-                escaped_name = cescape(src);
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-
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-        if (!escaped_name)
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-                return log_oom();
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-
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-        id = strjoina("cryptsetup:", escaped_name);
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+        id = strjoina("cryptsetup:", disk_path);
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         r = ask_password_auto(text, "drive-harddisk", id, until, accept_cached, passwords);
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         if (r < 0)
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@@ -361,7 +336,7 @@ static int get_password(const char *vol, const char *src, usec_t until, bool acc
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                 if (asprintf(&text, "Please enter passphrase for disk %s! (verification)", name) < 0)
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                         return log_oom();
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-                id = strjoina("cryptsetup-verification:", escaped_name);
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+                id = strjoina("cryptsetup-verification:", disk_path);
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                 r = ask_password_auto(text, "drive-harddisk", id, until, false, &passwords2);
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                 if (r < 0)