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authorJeremy Kerr <jk@ozlabs.org>2013-06-20 10:33:29 +0800
committerJeremy Kerr <jk@ozlabs.org>2013-06-24 13:07:58 +0800
commite9fd07f945135224708253845a2fa08943755b53 (patch)
tree80176b1ba0681bcf6058edfde9a32dadab49c10c /discover/boot.c
parent72332700113065602e3545b7a358a34c102851d8 (diff)
downloadtalos-petitboot-e9fd07f945135224708253845a2fa08943755b53.tar.gz
talos-petitboot-e9fd07f945135224708253845a2fa08943755b53.zip
discover/boot: Add boot hooks
Add a method of running pre-boot hooks. Executable files in /etc/petitboot/boot.d/ are run (in order) before we start the boot process. Signed-off-by: Jeremy Kerr <jk@ozlabs.org>
Diffstat (limited to 'discover/boot.c')
-rw-r--r--discover/boot.c63
1 files changed, 63 insertions, 0 deletions
diff --git a/discover/boot.c b/discover/boot.c
index ae44717..8c2e8e1 100644
--- a/discover/boot.c
+++ b/discover/boot.c
@@ -1,6 +1,13 @@
+#define _GNU_SOURCE
+
#include <stdbool.h>
+#include <stdlib.h>
#include <assert.h>
+#include <dirent.h>
+#include <string.h>
+#include <fcntl.h>
+#include <sys/types.h>
#include <log/log.h>
#include <pb-protocol/pb-protocol.h>
@@ -13,6 +20,8 @@
#include "paths.h"
#include "resource.h"
+static const char *boot_hook_dir = PKG_SYSCONF_DIR "/boot.d";
+
struct boot_task {
char *local_image;
char *local_initrd;
@@ -139,6 +148,58 @@ static void update_status(boot_status_fn fn, void *arg, int type,
fn(arg, &status);
}
+static int hook_filter(const struct dirent *dirent)
+{
+ return dirent->d_type == DT_REG || dirent->d_type == DT_LNK;
+}
+
+static int hook_cmp(const struct dirent **a, const struct dirent **b)
+{
+ return strcmp((*a)->d_name, (*b)->d_name);
+}
+
+static void run_boot_hooks(void *ctx, struct boot_task *task,
+ boot_status_fn status_fn, void *status_arg)
+{
+ struct dirent **hooks;
+ int i, n;
+
+ n = scandir(boot_hook_dir, &hooks, hook_filter, hook_cmp);
+ if (n < 1)
+ return;
+
+ update_status(status_fn, status_arg, BOOT_STATUS_INFO,
+ "running boot hooks");
+
+ /* pass boot data to hooks */
+ setenv("boot_image", task->local_image, 1);
+ if (task->local_initrd)
+ setenv("boot_initrd", task->local_initrd, 1);
+ if (task->local_dtb)
+ setenv("boot_dtb", task->local_dtb, 1);
+ if (task->args)
+ setenv("boot_args", task->args, 1);
+
+ for (i = 0; i < n; i++) {
+ char *path;
+ const char *argv[2] = { NULL, NULL };
+
+ path = join_paths(ctx, boot_hook_dir, hooks[i]->d_name);
+
+ if (access(path, X_OK))
+ continue;
+
+ pb_log("running boot hook %s\n", hooks[i]->d_name);
+
+ argv[0] = path;
+ pb_run_cmd(argv, 1, task->dry_run);
+
+ talloc_free(path);
+ }
+
+ free(hooks);
+}
+
int boot(void *ctx, struct discover_boot_option *opt, struct boot_command *cmd,
int dry_run, boot_status_fn status_fn, void *status_arg)
{
@@ -218,6 +279,8 @@ int boot(void *ctx, struct discover_boot_option *opt, struct boot_command *cmd,
}
}
+ run_boot_hooks(ctx, &boot_task, status_fn, status_arg);
+
update_status(status_fn, status_arg, BOOT_STATUS_INFO,
"performing kexec_load");
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