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[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index] [xen master] tools/xenstore: split out environment specific live update code
commit 1a7fafdc744f4f725110f6411c4b4f182c77cfe8
Author: Juergen Gross <jgross@xxxxxxxx>
AuthorDate: Tue Jun 27 14:27:48 2023 +0200
Commit: Julien Grall <jgrall@xxxxxxxxxx>
CommitDate: Thu Jun 29 22:38:22 2023 +0100
tools/xenstore: split out environment specific live update code
Instead of using #ifdef in xenstored_control.c split out the code of
environment specific functions (daemon or Mini-OS) to dedicated source
files.
Signed-off-by: Juergen Gross <jgross@xxxxxxxx>
Reviewed-by: Julien Grall <jgrall@xxxxxxxxxx>
---
tools/xenstore/Makefile.common | 8 +-
tools/xenstore/xenstored_control.c | 247 +----------------------------------
tools/xenstore/xenstored_lu.h | 56 ++++++++
tools/xenstore/xenstored_lu_daemon.c | 130 ++++++++++++++++++
tools/xenstore/xenstored_lu_minios.c | 118 +++++++++++++++++
5 files changed, 312 insertions(+), 247 deletions(-)
diff --git a/tools/xenstore/Makefile.common b/tools/xenstore/Makefile.common
index f71c9bfd55..c42796fe34 100644
--- a/tools/xenstore/Makefile.common
+++ b/tools/xenstore/Makefile.common
@@ -4,10 +4,10 @@ XENSTORED_OBJS-y := xenstored_core.o xenstored_watch.o
xenstored_domain.o
XENSTORED_OBJS-y += xenstored_transaction.o xenstored_control.o
XENSTORED_OBJS-y += talloc.o utils.o tdb.o hashtable.o
-XENSTORED_OBJS-$(CONFIG_Linux) += xenstored_posix.o
-XENSTORED_OBJS-$(CONFIG_NetBSD) += xenstored_posix.o
-XENSTORED_OBJS-$(CONFIG_FreeBSD) += xenstored_posix.o
-XENSTORED_OBJS-$(CONFIG_MiniOS) += xenstored_minios.o
+XENSTORED_OBJS-$(CONFIG_Linux) += xenstored_posix.o xenstored_lu_daemon.o
+XENSTORED_OBJS-$(CONFIG_NetBSD) += xenstored_posix.o xenstored_lu_daemon.o
+XENSTORED_OBJS-$(CONFIG_FreeBSD) += xenstored_posix.o xenstored_lu_daemon.o
+XENSTORED_OBJS-$(CONFIG_MiniOS) += xenstored_minios.o xenstored_lu_minios.o
# Include configure output (config.h)
CFLAGS += -include $(XEN_ROOT)/tools/config.h
diff --git a/tools/xenstore/xenstored_control.c
b/tools/xenstore/xenstored_control.c
index 0d131e2ebc..8f1f31fd6a 100644
--- a/tools/xenstore/xenstored_control.c
+++ b/tools/xenstore/xenstored_control.c
@@ -38,63 +38,21 @@
#include "xenstored_core.h"
#include "xenstored_control.h"
#include "xenstored_domain.h"
+#include "xenstored_lu.h"
#include "xenstored_watch.h"
-/* Mini-OS only knows about MAP_ANON. */
-#ifndef MAP_ANONYMOUS
-#define MAP_ANONYMOUS MAP_ANON
-#endif
-
#ifndef NO_LIVE_UPDATE
-struct live_update {
- /* For verification the correct connection is acting. */
- struct connection *conn;
-
- /* Pointer to the command used to request LU */
- struct buffered_data *in;
-
-#ifdef __MINIOS__
- void *kernel;
- unsigned int kernel_size;
- unsigned int kernel_off;
-
- void *dump_state;
- unsigned long dump_size;
-#else
- char *filename;
-#endif
-
- char *cmdline;
-
- /* Start parameters. */
- bool force;
- unsigned int timeout;
- time_t started_at;
-};
-
-static struct live_update *lu_status;
-
-struct lu_dump_state {
- void *buf;
- unsigned int size;
-#ifndef __MINIOS__
- int fd;
- char *filename;
-#endif
-};
+struct live_update *lu_status;
static int lu_destroy(void *data)
{
-#ifdef __MINIOS__
- if (lu_status->dump_state)
- munmap(lu_status->dump_state, lu_status->dump_size);
-#endif
+ lu_destroy_arch(data);
lu_status = NULL;
return 0;
}
-static const char *lu_begin(struct connection *conn)
+const char *lu_begin(struct connection *conn)
{
if (lu_status)
return "live-update session already active.";
@@ -431,203 +389,6 @@ static const char *lu_cmdline(const void *ctx, struct
connection *conn,
return NULL;
}
-#ifdef __MINIOS__
-static const char *lu_binary_alloc(const void *ctx, struct connection *conn,
- unsigned long size)
-{
- const char *ret;
-
- syslog(LOG_INFO, "live-update: binary size %lu\n", size);
-
- ret = lu_begin(conn);
- if (ret)
- return ret;
-
- lu_status->kernel = talloc_size(lu_status, size);
- if (!lu_status->kernel)
- return "Allocation failure.";
-
- lu_status->kernel_size = size;
- lu_status->kernel_off = 0;
-
- errno = 0;
- return NULL;
-}
-
-static const char *lu_binary_save(const void *ctx, struct connection *conn,
- unsigned int size, const char *data)
-{
- if (!lu_status || lu_status->conn != conn)
- return "Not in live-update session.";
-
- if (lu_status->kernel_off + size > lu_status->kernel_size)
- return "Too much kernel data.";
-
- memcpy(lu_status->kernel + lu_status->kernel_off, data, size);
- lu_status->kernel_off += size;
-
- errno = 0;
- return NULL;
-}
-
-static const char *lu_arch(const void *ctx, struct connection *conn,
- char **vec, int num)
-{
- if (num == 2 && !strcmp(vec[0], "-b"))
- return lu_binary_alloc(ctx, conn, atol(vec[1]));
- if (num > 2 && !strcmp(vec[0], "-d"))
- return lu_binary_save(ctx, conn, atoi(vec[1]), vec[2]);
-
- errno = EINVAL;
- return NULL;
-}
-
-static FILE *lu_dump_open(const void *ctx)
-{
- lu_status->dump_size = ROUNDUP(talloc_total_size(NULL) * 2,
- XC_PAGE_SHIFT);
- lu_status->dump_state = mmap(NULL, lu_status->dump_size,
- PROT_READ | PROT_WRITE,
- MAP_PRIVATE | MAP_ANONYMOUS, -1, 0);
- if (lu_status->dump_state == MAP_FAILED)
- return NULL;
-
- return fmemopen(lu_status->dump_state, lu_status->dump_size, "w");
-}
-
-static void lu_dump_close(FILE *fp)
-{
- size_t size;
-
- size = ftell(fp);
- size = ROUNDUP(size, XC_PAGE_SHIFT);
- munmap(lu_status->dump_state + size, lu_status->dump_size - size);
- lu_status->dump_size = size;
-
- fclose(fp);
-}
-
-static void lu_get_dump_state(struct lu_dump_state *state)
-{
-}
-
-static void lu_close_dump_state(struct lu_dump_state *state)
-{
-}
-
-static char *lu_exec(const void *ctx, int argc, char **argv)
-{
- return "NYI";
-}
-#else
-static const char *lu_binary(const void *ctx, struct connection *conn,
- const char *filename)
-{
- const char *ret;
- struct stat statbuf;
-
- syslog(LOG_INFO, "live-update: binary %s\n", filename);
-
- if (stat(filename, &statbuf))
- return "File not accessible.";
- if (!(statbuf.st_mode & (S_IXOTH | S_IXGRP | S_IXUSR)))
- return "File not executable.";
-
- ret = lu_begin(conn);
- if (ret)
- return ret;
-
- lu_status->filename = talloc_strdup(lu_status, filename);
- if (!lu_status->filename)
- return "Allocation failure.";
-
- errno = 0;
- return NULL;
-}
-
-static const char *lu_arch(const void *ctx, struct connection *conn,
- char **vec, int num)
-{
- if (num == 2 && !strcmp(vec[0], "-f"))
- return lu_binary(ctx, conn, vec[1]);
-
- errno = EINVAL;
- return NULL;
-}
-
-static FILE *lu_dump_open(const void *ctx)
-{
- char *filename;
- int fd;
-
- filename = talloc_asprintf(ctx, "%s/state_dump",
- xenstore_daemon_rundir());
- if (!filename)
- return NULL;
-
- fd = open(filename, O_WRONLY | O_CREAT | O_TRUNC, S_IRUSR | S_IWUSR);
- if (fd < 0)
- return NULL;
-
- return fdopen(fd, "w");
-}
-
-static void lu_dump_close(FILE *fp)
-{
- fclose(fp);
-}
-
-static void lu_get_dump_state(struct lu_dump_state *state)
-{
- struct stat statbuf;
-
- state->size = 0;
-
- state->filename = talloc_asprintf(NULL, "%s/state_dump",
- xenstore_daemon_rundir());
- if (!state->filename)
- barf("Allocation failure");
-
- state->fd = open(state->filename, O_RDONLY);
- if (state->fd < 0)
- return;
- if (fstat(state->fd, &statbuf) != 0)
- goto out_close;
- state->size = statbuf.st_size;
-
- state->buf = mmap(NULL, state->size, PROT_READ, MAP_PRIVATE,
- state->fd, 0);
- if (state->buf == MAP_FAILED) {
- state->size = 0;
- goto out_close;
- }
-
- return;
-
- out_close:
- close(state->fd);
-}
-
-static void lu_close_dump_state(struct lu_dump_state *state)
-{
- assert(state->filename != NULL);
-
- munmap(state->buf, state->size);
- close(state->fd);
-
- unlink(state->filename);
- talloc_free(state->filename);
-}
-
-static char *lu_exec(const void *ctx, int argc, char **argv)
-{
- argv[0] = lu_status->filename;
- execvp(argv[0], argv);
-
- return "Error activating new binary.";
-}
-#endif
-
static bool lu_check_lu_allowed(void)
{
struct connection *conn;
diff --git a/tools/xenstore/xenstored_lu.h b/tools/xenstore/xenstored_lu.h
new file mode 100644
index 0000000000..1c09b9b639
--- /dev/null
+++ b/tools/xenstore/xenstored_lu.h
@@ -0,0 +1,56 @@
+/* SPDX-License-Identifier: MIT */
+
+/*
+ * Live Update interfaces for Xen Store Daemon.
+ * Copyright (C) 2022 Juergen Gross, SUSE LLC
+ */
+
+#ifndef NO_LIVE_UPDATE
+struct live_update {
+ /* For verification the correct connection is acting. */
+ struct connection *conn;
+
+ /* Pointer to the command used to request LU */
+ struct buffered_data *in;
+
+#ifdef __MINIOS__
+ void *kernel;
+ unsigned int kernel_size;
+ unsigned int kernel_off;
+
+ void *dump_state;
+ unsigned long dump_size;
+#else
+ char *filename;
+#endif
+
+ char *cmdline;
+
+ /* Start parameters. */
+ bool force;
+ unsigned int timeout;
+ time_t started_at;
+};
+
+struct lu_dump_state {
+ void *buf;
+ unsigned int size;
+#ifndef __MINIOS__
+ int fd;
+ char *filename;
+#endif
+};
+
+extern struct live_update *lu_status;
+
+/* Live update private interfaces. */
+void lu_get_dump_state(struct lu_dump_state *state);
+void lu_close_dump_state(struct lu_dump_state *state);
+FILE *lu_dump_open(const void *ctx);
+void lu_dump_close(FILE *fp);
+char *lu_exec(const void *ctx, int argc, char **argv);
+const char *lu_arch(const void *ctx, struct connection *conn, char **vec,
+ int num);
+const char *lu_begin(struct connection *conn);
+void lu_destroy_arch(void *data);
+#endif
diff --git a/tools/xenstore/xenstored_lu_daemon.c
b/tools/xenstore/xenstored_lu_daemon.c
new file mode 100644
index 0000000000..310fb8c2e6
--- /dev/null
+++ b/tools/xenstore/xenstored_lu_daemon.c
@@ -0,0 +1,130 @@
+/* SPDX-License-Identifier: GPL-2.0-or-later */
+
+/*
+ * Live Update for Xen Store Daemon.
+ * Copyright (C) 2022 Juergen Gross, SUSE LLC
+ */
+
+#include <assert.h>
+#include <stdio.h>
+#include <syslog.h>
+#include <sys/stat.h>
+#include <sys/mman.h>
+#include <xen-tools/xenstore-common.h>
+
+#include "talloc.h"
+#include "xenstored_core.h"
+#include "xenstored_lu.h"
+
+#ifndef NO_LIVE_UPDATE
+void lu_get_dump_state(struct lu_dump_state *state)
+{
+ struct stat statbuf;
+
+ state->size = 0;
+
+ state->filename = talloc_asprintf(NULL, "%s/state_dump",
+ xenstore_daemon_rundir());
+ if (!state->filename)
+ barf("Allocation failure");
+
+ state->fd = open(state->filename, O_RDONLY);
+ if (state->fd < 0)
+ return;
+ if (fstat(state->fd, &statbuf) != 0)
+ goto out_close;
+ state->size = statbuf.st_size;
+
+ state->buf = mmap(NULL, state->size, PROT_READ, MAP_PRIVATE,
+ state->fd, 0);
+ if (state->buf == MAP_FAILED) {
+ state->size = 0;
+ goto out_close;
+ }
+
+ return;
+
+ out_close:
+ close(state->fd);
+}
+
+void lu_close_dump_state(struct lu_dump_state *state)
+{
+ assert(state->filename != NULL);
+
+ munmap(state->buf, state->size);
+ close(state->fd);
+
+ unlink(state->filename);
+ talloc_free(state->filename);
+}
+
+FILE *lu_dump_open(const void *ctx)
+{
+ char *filename;
+ int fd;
+
+ filename = talloc_asprintf(ctx, "%s/state_dump",
+ xenstore_daemon_rundir());
+ if (!filename)
+ return NULL;
+
+ fd = open(filename, O_WRONLY | O_CREAT | O_TRUNC, S_IRUSR | S_IWUSR);
+ if (fd < 0)
+ return NULL;
+
+ return fdopen(fd, "w");
+}
+
+void lu_dump_close(FILE *fp)
+{
+ fclose(fp);
+}
+
+char *lu_exec(const void *ctx, int argc, char **argv)
+{
+ argv[0] = lu_status->filename;
+ execvp(argv[0], argv);
+
+ return "Error activating new binary.";
+}
+
+void lu_destroy_arch(void *data)
+{
+}
+
+static const char *lu_binary(const void *ctx, struct connection *conn,
+ const char *filename)
+{
+ const char *ret;
+ struct stat statbuf;
+
+ syslog(LOG_INFO, "live-update: binary %s\n", filename);
+
+ if (stat(filename, &statbuf))
+ return "File not accessible.";
+ if (!(statbuf.st_mode & (S_IXOTH | S_IXGRP | S_IXUSR)))
+ return "File not executable.";
+
+ ret = lu_begin(conn);
+ if (ret)
+ return ret;
+
+ lu_status->filename = talloc_strdup(lu_status, filename);
+ if (!lu_status->filename)
+ return "Allocation failure.";
+
+ errno = 0;
+ return NULL;
+}
+
+const char *lu_arch(const void *ctx, struct connection *conn, char **vec,
+ int num)
+{
+ if (num == 2 && !strcmp(vec[0], "-f"))
+ return lu_binary(ctx, conn, vec[1]);
+
+ errno = EINVAL;
+ return NULL;
+}
+#endif
diff --git a/tools/xenstore/xenstored_lu_minios.c
b/tools/xenstore/xenstored_lu_minios.c
new file mode 100644
index 0000000000..88fb9e0f38
--- /dev/null
+++ b/tools/xenstore/xenstored_lu_minios.c
@@ -0,0 +1,118 @@
+/* SPDX-License-Identifier: GPL-2.0-or-later */
+
+/*
+ * Live Update for Xen Store Daemon.
+ * Copyright (C) 2022 Juergen Gross, SUSE LLC
+ */
+
+#include <stdbool.h>
+#include <stdio.h>
+#include <stdlib.h>
+#include <syslog.h>
+#include <sys/mman.h>
+#include <xenctrl.h>
+#include <xen-tools/common-macros.h>
+
+#include "talloc.h"
+#include "xenstored_lu.h"
+
+/* Mini-OS only knows about MAP_ANON. */
+#ifndef MAP_ANONYMOUS
+#define MAP_ANONYMOUS MAP_ANON
+#endif
+
+#ifndef NO_LIVE_UPDATE
+void lu_get_dump_state(struct lu_dump_state *state)
+{
+}
+
+void lu_close_dump_state(struct lu_dump_state *state)
+{
+}
+
+FILE *lu_dump_open(const void *ctx)
+{
+ lu_status->dump_size = ROUNDUP(talloc_total_size(NULL) * 2,
+ XC_PAGE_SHIFT);
+ lu_status->dump_state = mmap(NULL, lu_status->dump_size,
+ PROT_READ | PROT_WRITE,
+ MAP_PRIVATE | MAP_ANONYMOUS, -1, 0);
+ if (lu_status->dump_state == MAP_FAILED)
+ return NULL;
+
+ return fmemopen(lu_status->dump_state, lu_status->dump_size, "w");
+}
+
+void lu_dump_close(FILE *fp)
+{
+ size_t size;
+
+ size = ftell(fp);
+ size = ROUNDUP(size, XC_PAGE_SHIFT);
+ munmap(lu_status->dump_state + size, lu_status->dump_size - size);
+ lu_status->dump_size = size;
+
+ fclose(fp);
+}
+
+char *lu_exec(const void *ctx, int argc, char **argv)
+{
+ return "NYI";
+}
+
+void lu_destroy_arch(void *data)
+{
+ if (lu_status->dump_state)
+ munmap(lu_status->dump_state, lu_status->dump_size);
+}
+
+static const char *lu_binary_alloc(const void *ctx, struct connection *conn,
+ unsigned long size)
+{
+ const char *ret;
+
+ syslog(LOG_INFO, "live-update: binary size %lu\n", size);
+
+ ret = lu_begin(conn);
+ if (ret)
+ return ret;
+
+ lu_status->kernel = talloc_size(lu_status, size);
+ if (!lu_status->kernel)
+ return "Allocation failure.";
+
+ lu_status->kernel_size = size;
+ lu_status->kernel_off = 0;
+
+ errno = 0;
+ return NULL;
+}
+
+static const char *lu_binary_save(const void *ctx, struct connection *conn,
+ unsigned int size, const char *data)
+{
+ if (!lu_status || lu_status->conn != conn)
+ return "Not in live-update session.";
+
+ if (lu_status->kernel_off + size > lu_status->kernel_size)
+ return "Too much kernel data.";
+
+ memcpy(lu_status->kernel + lu_status->kernel_off, data, size);
+ lu_status->kernel_off += size;
+
+ errno = 0;
+ return NULL;
+}
+
+const char *lu_arch(const void *ctx, struct connection *conn, char **vec,
+ int num)
+{
+ if (num == 2 && !strcmp(vec[0], "-b"))
+ return lu_binary_alloc(ctx, conn, atol(vec[1]));
+ if (num > 2 && !strcmp(vec[0], "-d"))
+ return lu_binary_save(ctx, conn, atoi(vec[1]), vec[2]);
+
+ errno = EINVAL;
+ return NULL;
+}
+#endif
--
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