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authorJeremy Kerr <jk@ozlabs.org>2013-02-27 16:45:21 +0800
committerJeremy Kerr <jk@ozlabs.org>2013-04-15 15:42:27 +0800
commitc62667e5c78ea212e5ac49244e9792954a1d8f71 (patch)
tree4206cfff1ddd26ad16e279b065fdf41c00664bb6 /discover/paths.c
parentb8122dc9340e2f208220f0c88b4d71f91b78774f (diff)
downloadtalos-petitboot-c62667e5c78ea212e5ac49244e9792954a1d8f71.tar.gz
talos-petitboot-c62667e5c78ea212e5ac49244e9792954a1d8f71.zip
Move boot to discover server
This change moves the boot-via-kexec functionality from the UIs to the discover server. On the UI side: rather than run kexec directly, we just send a message to the discover server. Because this is generic discover client functionality, we no longer need the boot callbacks in the twin- and ncurses-specific code. We also remove the kexec and URL-loading code from the UIs, and add it to the discover server code, in paths.c. We expose this to the server though a new function: load_path(void *, const char *, unsigned int *); On the server side, we simply move hook up the boot() function to use the load_file and kexec calls. Signed-off-by: Jeremy Kerr <jk@ozlabs.org>
Diffstat (limited to 'discover/paths.c')
-rw-r--r--discover/paths.c277
1 files changed, 277 insertions, 0 deletions
diff --git a/discover/paths.c b/discover/paths.c
index c403691..ef8a45f 100644
--- a/discover/paths.c
+++ b/discover/paths.c
@@ -5,6 +5,9 @@
#include <stdlib.h>
#include <talloc/talloc.h>
+#include <system/system.h>
+#include <url/url.h>
+#include <log/log.h>
#include "paths.h"
@@ -153,3 +156,277 @@ char *join_paths(void *alloc_ctx, const char *a, const char *b)
return full_path;
}
+
+static char *local_name(void *ctx)
+{
+ char *tmp, *ret;
+
+ tmp = tempnam(NULL, "pb-");
+
+ if (!tmp)
+ return NULL;
+
+ ret = talloc_strdup(ctx, tmp);
+ free(tmp);
+
+ return ret;
+}
+
+/**
+ * pb_load_nfs - Mounts the NFS export and returns the local file path.
+ *
+ * Returns the local file path in a talloc'ed character string on success,
+ * or NULL on error.
+ */
+static char *load_nfs(void *ctx, struct pb_url *url)
+{
+ int result;
+ const char *argv[8];
+ const char **p;
+ char *local;
+ char *opts;
+
+ local = local_name(ctx);
+
+ if (!local)
+ return NULL;
+
+ result = pb_mkdir_recursive(local);
+
+ if (result)
+ goto fail;
+
+ opts = talloc_strdup(NULL, "ro,nolock,nodiratime");
+
+ if (url->port)
+ opts = talloc_asprintf_append(opts, ",port=%s", url->port);
+
+ p = argv;
+ *p++ = pb_system_apps.mount; /* 1 */
+ *p++ = "-t"; /* 2 */
+ *p++ = "nfs"; /* 3 */
+ *p++ = opts; /* 4 */
+ *p++ = url->host; /* 5 */
+ *p++ = url->dir; /* 6 */
+ *p++ = local; /* 7 */
+ *p++ = NULL; /* 8 */
+
+ result = pb_run_cmd(argv, 1, 0);
+
+ talloc_free(opts);
+
+ if (result)
+ goto fail;
+
+ local = talloc_asprintf_append(local, "/%s", url->path);
+ pb_log("%s: local '%s'\n", __func__, local);
+
+ return local;
+
+fail:
+ pb_rmdir_recursive("/", local);
+ talloc_free(local);
+ return NULL;
+}
+
+/**
+ * pb_load_sftp - Loads a remote file via sftp and returns the local file path.
+ *
+ * Returns the local file path in a talloc'ed character string on success,
+ * or NULL on error.
+ */
+static char *load_sftp(void *ctx, struct pb_url *url)
+{
+ int result;
+ const char *argv[4];
+ const char **p;
+ char *local;
+
+ local = local_name(ctx);
+
+ if (!local)
+ return NULL;
+
+ p = argv;
+ *p++ = pb_system_apps.sftp; /* 1 */
+ *p++ = talloc_asprintf(local, "%s:%s", url->host, url->path); /* 2 */
+ *p++ = local; /* 3 */
+ *p++ = NULL; /* 4 */
+
+ result = pb_run_cmd(argv, 1, 0);
+
+ if (result)
+ goto fail;
+
+ return local;
+
+fail:
+ talloc_free(local);
+ return NULL;
+}
+
+/**
+ * pb_load_tftp - Loads a remote file via tftp and returns the local file path.
+ *
+ * Returns the local file path in a talloc'ed character string on success,
+ * or NULL on error.
+ */
+
+static char *load_tftp(void *ctx, struct pb_url *url)
+{
+ int result;
+ const char *argv[10];
+ const char **p;
+ char *local;
+
+ local = local_name(ctx);
+
+ if (!local)
+ return NULL;
+
+ /* first try busybox tftp args */
+
+ p = argv;
+ *p++ = pb_system_apps.tftp; /* 1 */
+ *p++ = "-g"; /* 2 */
+ *p++ = "-l"; /* 3 */
+ *p++ = local; /* 4 */
+ *p++ = "-r"; /* 5 */
+ *p++ = url->path; /* 6 */
+ *p++ = url->host; /* 7 */
+ if (url->port)
+ *p++ = url->port; /* 8 */
+ *p++ = NULL; /* 9 */
+
+ result = pb_run_cmd(argv, 1, 0);
+
+ if (!result)
+ return local;
+
+ /* next try tftp-hpa args */
+
+ p = argv;
+ *p++ = pb_system_apps.tftp; /* 1 */
+ *p++ = "-m"; /* 2 */
+ *p++ = "binary"; /* 3 */
+ *p++ = url->host; /* 4 */
+ if (url->port)
+ *p++ = url->port; /* 5 */
+ *p++ = "-c"; /* 6 */
+ *p++ = "get"; /* 7 */
+ *p++ = url->path; /* 8 */
+ *p++ = local; /* 9 */
+ *p++ = NULL; /* 10 */
+
+ result = pb_run_cmd(argv, 1, 0);
+
+ if (!result)
+ return local;
+
+ talloc_free(local);
+ return NULL;
+}
+
+enum wget_flags {
+ wget_empty = 0,
+ wget_no_check_certificate = 1,
+};
+
+/**
+ * pb_load_wget - Loads a remote file via wget and returns the local file path.
+ *
+ * Returns the local file path in a talloc'ed character string on success,
+ * or NULL on error.
+ */
+
+static char *load_wget(void *ctx, struct pb_url *url, enum wget_flags flags)
+{
+ int result;
+ const char *argv[7];
+ const char **p;
+ char *local;
+
+ local = local_name(ctx);
+
+ if (!local)
+ return NULL;
+
+ p = argv;
+ *p++ = pb_system_apps.wget; /* 1 */
+#if !defined(DEBUG)
+ *p++ = "--quiet"; /* 2 */
+#endif
+ *p++ = "-O"; /* 3 */
+ *p++ = local; /* 4 */
+ *p++ = url->full; /* 5 */
+ if (flags & wget_no_check_certificate)
+ *p++ = "--no-check-certificate"; /* 6 */
+ *p++ = NULL; /* 7 */
+
+ result = pb_run_cmd(argv, 1, 0);
+
+ if (result)
+ goto fail;
+
+ return local;
+
+fail:
+ talloc_free(local);
+ return NULL;
+}
+
+/**
+ * pb_load_file - Loads a (possibly) remote file and returns the local file
+ * path.
+ * @ctx: The talloc context to associate with the returned string.
+ * @remote: The remote file URL.
+ * @tempfile: An optional variable pointer to be set when a temporary local
+ * file is created.
+ *
+ * Returns the local file path in a talloc'ed character string on success,
+ * or NULL on error.
+ */
+
+char *load_file(void *ctx, const char *remote, unsigned int *tempfile)
+{
+ struct pb_url *url = pb_url_parse(ctx, remote);
+ char *local;
+ int tmp = 0;
+
+ if (!url)
+ return NULL;
+
+ switch (url->scheme) {
+ case pb_url_ftp:
+ case pb_url_http:
+ local = load_wget(ctx, url, 0);
+ tmp = !!local;
+ break;
+ case pb_url_https:
+ local = load_wget(ctx, url, wget_no_check_certificate);
+ tmp = !!local;
+ break;
+ case pb_url_nfs:
+ local = load_nfs(ctx, url);
+ tmp = !!local;
+ break;
+ case pb_url_sftp:
+ local = load_sftp(ctx, url);
+ tmp = !!local;
+ break;
+ case pb_url_tftp:
+ local = load_tftp(ctx, url);
+ tmp = !!local;
+ break;
+ default:
+ local = talloc_strdup(ctx, url->full);
+ tmp = 0;
+ break;
+ }
+
+ if (tempfile)
+ *tempfile = tmp;
+
+ talloc_free(url);
+ return local;
+}
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