grub2/0045-grub2-btrfs-04-grub2-install.patch

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From 0000000000000000000000000000000000000000 Mon Sep 17 00:00:00 2001
From: Michael Chang <mchang@suse.com>
Date: Thu, 21 Aug 2014 03:39:11 +0000
Subject: [PATCH] grub2-btrfs-04-grub2-install
Signed-off-by: Michael Chang <mchang@suse.com>
Signed-off-by: Robbie Harwood <rharwood@redhat.com>
---
grub-core/osdep/linux/getroot.c | 7 +++++++
grub-core/osdep/unix/config.c | 17 +++++++++++++++--
util/config.c | 10 ++++++++++
util/grub-install.c | 15 +++++++++++++++
util/grub-mkrelpath.c | 6 ++++++
include/grub/emu/config.h | 1 +
6 files changed, 54 insertions(+), 2 deletions(-)
diff --git a/grub-core/osdep/linux/getroot.c b/grub-core/osdep/linux/getroot.c
index 001b818fe..caf9b1ccd 100644
--- a/grub-core/osdep/linux/getroot.c
+++ b/grub-core/osdep/linux/getroot.c
@@ -376,6 +376,7 @@ get_btrfs_fs_prefix (const char *mount_path)
return NULL;
}
+int use_relative_path_on_btrfs = 0;
char **
grub_find_root_devices_from_mountinfo (const char *dir, char **relroot)
@@ -519,6 +520,12 @@ again:
{
ret = grub_find_root_devices_from_btrfs (dir);
fs_prefix = get_btrfs_fs_prefix (entries[i].enc_path);
+ if (use_relative_path_on_btrfs)
+ {
+ if (fs_prefix)
+ free (fs_prefix);
+ fs_prefix = xstrdup ("/");
+ }
}
else if (!retry && grub_strcmp (entries[i].fstype, "autofs") == 0)
{
diff --git a/grub-core/osdep/unix/config.c b/grub-core/osdep/unix/config.c
index 7d6325138..46a881530 100644
--- a/grub-core/osdep/unix/config.c
+++ b/grub-core/osdep/unix/config.c
@@ -82,6 +82,19 @@ grub_util_load_config (struct grub_util_config *cfg)
if (v)
cfg->grub_distributor = xstrdup (v);
+ v = getenv ("SUSE_BTRFS_SNAPSHOT_BOOTING");
+ if (v)
+ {
+ if (grub_strncmp(v, "true", sizeof ("true") - 1) == 0)
+ {
+ cfg->is_suse_btrfs_snapshot_enabled = 1;
+ }
+ else
+ {
+ cfg->is_suse_btrfs_snapshot_enabled = 0;
+ }
+ }
+
cfgfile = grub_util_get_config_filename ();
if (!grub_util_is_regular (cfgfile))
return;
@@ -105,8 +118,8 @@ grub_util_load_config (struct grub_util_config *cfg)
*ptr++ = *iptr;
}
- strcpy (ptr, "'; printf \"GRUB_ENABLE_CRYPTODISK=%s\\nGRUB_DISTRIBUTOR=%s\\n\" "
- "\"$GRUB_ENABLE_CRYPTODISK\" \"$GRUB_DISTRIBUTOR\"");
+ strcpy (ptr, "'; printf \"GRUB_ENABLE_CRYPTODISK=%s\\nGRUB_DISTRIBUTOR=%s\\nSUSE_BTRFS_SNAPSHOT_BOOTING=%s\\n\" "
+ "\"$GRUB_ENABLE_CRYPTODISK\" \"$GRUB_DISTRIBUTOR\" \"$SUSE_BTRFS_SNAPSHOT_BOOTING\"");
argv[2] = script;
argv[3] = '\0';
diff --git a/util/config.c b/util/config.c
index ebcdd8f5e..f044a880a 100644
--- a/util/config.c
+++ b/util/config.c
@@ -42,6 +42,16 @@ grub_util_parse_config (FILE *f, struct grub_util_config *cfg, int simple)
cfg->is_cryptodisk_enabled = 1;
continue;
}
+ if (grub_strncmp (ptr, "SUSE_BTRFS_SNAPSHOT_BOOTING=",
+ sizeof ("SUSE_BTRFS_SNAPSHOT_BOOTING=") - 1) == 0)
+ {
+ ptr += sizeof ("SUSE_BTRFS_SNAPSHOT_BOOTING=") - 1;
+ if (*ptr == '"' || *ptr == '\'')
+ ptr++;
+ if (grub_strncmp(ptr, "true", sizeof ("true") - 1) == 0)
+ cfg->is_suse_btrfs_snapshot_enabled = 1;
+ continue;
+ }
if (grub_strncmp (ptr, "GRUB_DISTRIBUTOR=",
sizeof ("GRUB_DISTRIBUTOR=") - 1) == 0)
{
diff --git a/util/grub-install.c b/util/grub-install.c
index 0fbe7f78c..0f66f36d2 100644
--- a/util/grub-install.c
+++ b/util/grub-install.c
@@ -827,6 +827,8 @@ fill_core_services (const char *core_services)
free (sysv_plist);
}
+extern int use_relative_path_on_btrfs;
+
int
main (int argc, char *argv[])
{
@@ -860,6 +862,9 @@ main (int argc, char *argv[])
grub_util_load_config (&config);
+ if (config.is_suse_btrfs_snapshot_enabled)
+ use_relative_path_on_btrfs = 1;
+
if (!bootloader_id && config.grub_distributor)
{
char *ptr;
@@ -1352,6 +1357,16 @@ main (int argc, char *argv[])
fprintf (load_cfg_f, "set debug='%s'\n",
debug_image);
}
+
+ if (config.is_suse_btrfs_snapshot_enabled
+ && grub_strncmp(grub_fs->name, "btrfs", sizeof ("btrfs") - 1) == 0)
+ {
+ if (!load_cfg_f)
+ load_cfg_f = grub_util_fopen (load_cfg, "wb");
+ have_load_cfg = 1;
+ fprintf (load_cfg_f, "set btrfs_relative_path='y'\n");
+ }
+
char *prefix_drive = NULL;
char *install_drive = NULL;
diff --git a/util/grub-mkrelpath.c b/util/grub-mkrelpath.c
index 47a241a39..5db7a9a7d 100644
--- a/util/grub-mkrelpath.c
+++ b/util/grub-mkrelpath.c
@@ -40,9 +40,12 @@ struct arguments
};
static struct argp_option options[] = {
+ {"relative", 'r', 0, 0, "use relative path on btrfs", 0},
{ 0, 0, 0, 0, 0, 0 }
};
+extern int use_relative_path_on_btrfs;
+
static error_t
argp_parser (int key, char *arg, struct argp_state *state)
{
@@ -52,6 +55,9 @@ argp_parser (int key, char *arg, struct argp_state *state)
switch (key)
{
+ case 'r':
+ use_relative_path_on_btrfs = 1;
+ break;
case ARGP_KEY_ARG:
if (state->arg_num == 0)
arguments->pathname = xstrdup (arg);
diff --git a/include/grub/emu/config.h b/include/grub/emu/config.h
index 875d5896c..c9a7e5f4a 100644
--- a/include/grub/emu/config.h
+++ b/include/grub/emu/config.h
@@ -37,6 +37,7 @@ struct grub_util_config
{
int is_cryptodisk_enabled;
char *grub_distributor;
+ int is_suse_btrfs_snapshot_enabled;
};
void