aboutsummaryrefslogtreecommitdiffstats
diff options
context:
space:
mode:
Diffstat
-rw-r--r--include/linux/trace_events.h2
-rw-r--r--init/Kconfig1
-rw-r--r--init/main.c37
-rw-r--r--kernel/trace/trace_events_hist.c227
-rw-r--r--kernel/trace/trace_kprobe.c2
-rw-r--r--lib/Kconfig3
-rw-r--r--lib/Makefile2
-rw-r--r--lib/bootconfig.c15
-rw-r--r--tools/bootconfig/include/linux/memblock.h12
-rw-r--r--tools/bootconfig/include/linux/printk.h2
-rw-r--r--tools/bootconfig/main.c28
-rwxr-xr-xtools/bootconfig/test-bootconfig.sh9
12 files changed, 167 insertions, 173 deletions
diff --git a/include/linux/trace_events.h b/include/linux/trace_events.h
index af2c85d3a1dd..6c7a10a6d71e 100644
--- a/include/linux/trace_events.h
+++ b/include/linux/trace_events.h
@@ -440,7 +440,7 @@ struct synth_event_trace_state {
struct synth_event *event;
unsigned int cur_field;
unsigned int n_u64;
- bool enabled;
+ bool disabled;
bool add_next;
bool add_name;
};
diff --git a/init/Kconfig b/init/Kconfig
index cfee56c151f1..452bc1835cd4 100644
--- a/init/Kconfig
+++ b/init/Kconfig
@@ -1227,7 +1227,6 @@ endif
config BOOT_CONFIG
bool "Boot config support"
depends on BLK_DEV_INITRD
- select LIBXBC
default y
help
Extra boot config allows system admin to pass a config file as
diff --git a/init/main.c b/init/main.c
index cc0ee4873419..f95b014a5479 100644
--- a/init/main.c
+++ b/init/main.c
@@ -142,6 +142,15 @@ static char *extra_command_line;
/* Extra init arguments */
static char *extra_init_args;
+#ifdef CONFIG_BOOT_CONFIG
+/* Is bootconfig on command line? */
+static bool bootconfig_found;
+static bool initargs_found;
+#else
+# define bootconfig_found false
+# define initargs_found false
+#endif
+
static char *execute_command;
static char *ramdisk_execute_command;
@@ -336,17 +345,30 @@ u32 boot_config_checksum(unsigned char *p, u32 size)
return ret;
}
+static int __init bootconfig_params(char *param, char *val,
+ const char *unused, void *arg)
+{
+ if (strcmp(param, "bootconfig") == 0) {
+ bootconfig_found = true;
+ } else if (strcmp(param, "--") == 0) {
+ initargs_found = true;
+ }
+ return 0;
+}
+
static void __init setup_boot_config(const char *cmdline)
{
+ static char tmp_cmdline[COMMAND_LINE_SIZE] __initdata;
u32 size, csum;
char *data, *copy;
- const char *p;
u32 *hdr;
int ret;
- p = strstr(cmdline, "bootconfig");
- if (!p || (p != cmdline && !isspace(*(p-1))) ||
- (p[10] && !isspace(p[10])))
+ strlcpy(tmp_cmdline, boot_command_line, COMMAND_LINE_SIZE);
+ parse_args("bootconfig", tmp_cmdline, NULL, 0, 0, 0, NULL,
+ bootconfig_params);
+
+ if (!bootconfig_found)
return;
if (!initrd_end)
@@ -562,11 +584,12 @@ static void __init setup_command_line(char *command_line)
* to init.
*/
len = strlen(saved_command_line);
- if (!strstr(boot_command_line, " -- ")) {
+ if (initargs_found) {
+ saved_command_line[len++] = ' ';
+ } else {
strcpy(saved_command_line + len, " -- ");
len += 4;
- } else
- saved_command_line[len++] = ' ';
+ }
strcpy(saved_command_line + len, extra_init_args);
}
diff --git a/kernel/trace/trace_events_hist.c b/kernel/trace/trace_events_hist.c
index e7ce7cdac62f..483b3fd1094f 100644
--- a/kernel/trace/trace_events_hist.c
+++ b/kernel/trace/trace_events_hist.c
@@ -1798,6 +1798,60 @@ void synth_event_cmd_init(struct dynevent_cmd *cmd, char *buf, int maxlen)
}
EXPORT_SYMBOL_GPL(synth_event_cmd_init);
+static inline int
+__synth_event_trace_start(struct trace_event_file *file,
+ struct synth_event_trace_state *trace_state)
+{
+ int entry_size, fields_size = 0;
+ int ret = 0;
+
+ /*
+ * Normal event tracing doesn't get called at all unless the
+ * ENABLED bit is set (which attaches the probe thus allowing
+ * this code to be called, etc). Because this is called
+ * directly by the user, we don't have that but we still need
+ * to honor not logging when disabled. For the the iterated
+ * trace case, we save the enabed state upon start and just
+ * ignore the following data calls.
+ */
+ if (!(file->flags & EVENT_FILE_FL_ENABLED) ||
+ trace_trigger_soft_disabled(file)) {
+ trace_state->disabled = true;
+ ret = -ENOENT;
+ goto out;
+ }
+
+ trace_state->event = file->event_call->data;
+
+ fields_size = trace_state->event->n_u64 * sizeof(u64);
+
+ /*
+ * Avoid ring buffer recursion detection, as this event
+ * is being performed within another event.
+ */
+ trace_state->buffer = file->tr->array_buffer.buffer;
+ ring_buffer_nest_start(trace_state->buffer);
+
+ entry_size = sizeof(*trace_state->entry) + fields_size;
+ trace_state->entry = trace_event_buffer_reserve(&trace_state->fbuffer,
+ file,
+ entry_size);
+ if (!trace_state->entry) {
+ ring_buffer_nest_end(trace_state->buffer);
+ ret = -EINVAL;
+ }
+out:
+ return ret;
+}
+
+static inline void
+__synth_event_trace_end(struct synth_event_trace_state *trace_state)
+{
+ trace_event_buffer_commit(&trace_state->fbuffer);
+
+ ring_buffer_nest_end(trace_state->buffer);
+}
+
/**
* synth_event_trace - Trace a synthetic event
* @file: The trace_event_file representing the synthetic event
@@ -1819,71 +1873,38 @@ EXPORT_SYMBOL_GPL(synth_event_cmd_init);
*/
int synth_event_trace(struct trace_event_file *file, unsigned int n_vals, ...)
{
- struct trace_event_buffer fbuffer;
- struct synth_trace_event *entry;
- struct trace_buffer *buffer;
- struct synth_event *event;
+ struct synth_event_trace_state state;
unsigned int i, n_u64;
- int fields_size = 0;
va_list args;
- int ret = 0;
-
- /*
- * Normal event generation doesn't get called at all unless
- * the ENABLED bit is set (which attaches the probe thus
- * allowing this code to be called, etc). Because this is
- * called directly by the user, we don't have that but we
- * still need to honor not logging when disabled.
- */
- if (!(file->flags & EVENT_FILE_FL_ENABLED))
- return 0;
-
- event = file->event_call->data;
-
- if (n_vals != event->n_fields)
- return -EINVAL;
-
- if (trace_trigger_soft_disabled(file))
- return -EINVAL;
-
- fields_size = event->n_u64 * sizeof(u64);
-
- /*
- * Avoid ring buffer recursion detection, as this event
- * is being performed within another event.
- */
- buffer = file->tr->array_buffer.buffer;
- ring_buffer_nest_start(buffer);
+ int ret;
- entry = trace_event_buffer_reserve(&fbuffer, file,
- sizeof(*entry) + fields_size);
- if (!entry) {
- ret = -EINVAL;
- goto out;
+ ret = __synth_event_trace_start(file, &state);
+ if (ret) {
+ if (ret == -ENOENT)
+ ret = 0; /* just disabled, not really an error */
+ return ret;
}
va_start(args, n_vals);
- for (i = 0, n_u64 = 0; i < event->n_fields; i++) {
+ for (i = 0, n_u64 = 0; i < state.event->n_fields; i++) {
u64 val;
val = va_arg(args, u64);
- if (event->fields[i]->is_string) {
+ if (state.event->fields[i]->is_string) {
char *str_val = (char *)(long)val;
- char *str_field = (char *)&entry->fields[n_u64];
+ char *str_field = (char *)&state.entry->fields[n_u64];
strscpy(str_field, str_val, STR_VAR_LEN_MAX);
n_u64 += STR_VAR_LEN_MAX / sizeof(u64);
} else {
- entry->fields[n_u64] = val;
+ state.entry->fields[n_u64] = val;
n_u64++;
}
}
va_end(args);
- trace_event_buffer_commit(&fbuffer);
-out:
- ring_buffer_nest_end(buffer);
+ __synth_event_trace_end(&state);
return ret;
}
@@ -1910,64 +1931,31 @@ EXPORT_SYMBOL_GPL(synth_event_trace);
int synth_event_trace_array(struct trace_event_file *file, u64 *vals,
unsigned int n_vals)
{
- struct trace_event_buffer fbuffer;
- struct synth_trace_event *entry;
- struct trace_buffer *buffer;
- struct synth_event *event;
+ struct synth_event_trace_state state;
unsigned int i, n_u64;
- int fields_size = 0;
- int ret = 0;
-
- /*
- * Normal event generation doesn't get called at all unless
- * the ENABLED bit is set (which attaches the probe thus
- * allowing this code to be called, etc). Because this is
- * called directly by the user, we don't have that but we
- * still need to honor not logging when disabled.
- */
- if (!(file->flags & EVENT_FILE_FL_ENABLED))
- return 0;
-
- event = file->event_call->data;
-
- if (n_vals != event->n_fields)
- return -EINVAL;
-
- if (trace_trigger_soft_disabled(file))
- return -EINVAL;
-
- fields_size = event->n_u64 * sizeof(u64);
-
- /*
- * Avoid ring buffer recursion detection, as this event
- * is being performed within another event.
- */
- buffer = file->tr->array_buffer.buffer;
- ring_buffer_nest_start(buffer);
+ int ret;
- entry = trace_event_buffer_reserve(&fbuffer, file,
- sizeof(*entry) + fields_size);
- if (!entry) {
- ret = -EINVAL;
- goto out;
+ ret = __synth_event_trace_start(file, &state);
+ if (ret) {
+ if (ret == -ENOENT)
+ ret = 0; /* just disabled, not really an error */
+ return ret;
}
- for (i = 0, n_u64 = 0; i < event->n_fields; i++) {
- if (event->fields[i]->is_string) {
+ for (i = 0, n_u64 = 0; i < state.event->n_fields; i++) {
+ if (state.event->fields[i]->is_string) {
char *str_val = (char *)(long)vals[i];
- char *str_field = (char *)&entry->fields[n_u64];
+ char *str_field = (char *)&state.entry->fields[n_u64];
strscpy(str_field, str_val, STR_VAR_LEN_MAX);
n_u64 += STR_VAR_LEN_MAX / sizeof(u64);
} else {
- entry->fields[n_u64] = vals[i];
+ state.entry->fields[n_u64] = vals[i];
n_u64++;
}
}
- trace_event_buffer_commit(&fbuffer);
-out:
- ring_buffer_nest_end(buffer);
+ __synth_event_trace_end(&state);
return ret;
}
@@ -2004,58 +1992,17 @@ EXPORT_SYMBOL_GPL(synth_event_trace_array);
int synth_event_trace_start(struct trace_event_file *file,
struct synth_event_trace_state *trace_state)
{
- struct synth_trace_event *entry;
- int fields_size = 0;
- int ret = 0;
+ int ret;
- if (!trace_state) {
- ret = -EINVAL;
- goto out;
- }
+ if (!trace_state)
+ return -EINVAL;
memset(trace_state, '\0', sizeof(*trace_state));
- /*
- * Normal event tracing doesn't get called at all unless the
- * ENABLED bit is set (which attaches the probe thus allowing
- * this code to be called, etc). Because this is called
- * directly by the user, we don't have that but we still need
- * to honor not logging when disabled. For the the iterated
- * trace case, we save the enabed state upon start and just
- * ignore the following data calls.
- */
- if (!(file->flags & EVENT_FILE_FL_ENABLED)) {
- trace_state->enabled = false;
- goto out;
- }
-
- trace_state->enabled = true;
-
- trace_state->event = file->event_call->data;
-
- if (trace_trigger_soft_disabled(file)) {
- ret = -EINVAL;
- goto out;
- }
+ ret = __synth_event_trace_start(file, trace_state);
+ if (ret == -ENOENT)
+ ret = 0; /* just disabled, not really an error */
- fields_size = trace_state->event->n_u64 * sizeof(u64);
-
- /*
- * Avoid ring buffer recursion detection, as this event
- * is being performed within another event.
- */
- trace_state->buffer = file->tr->array_buffer.buffer;
- ring_buffer_nest_start(trace_state->buffer);
-
- entry = trace_event_buffer_reserve(&trace_state->fbuffer, file,
- sizeof(*entry) + fields_size);
- if (!entry) {
- ret = -EINVAL;
- goto out;
- }
-
- trace_state->entry = entry;
-out:
return ret;
}
EXPORT_SYMBOL_GPL(synth_event_trace_start);
@@ -2088,7 +2035,7 @@ static int __synth_event_add_val(const char *field_name, u64 val,
trace_state->add_next = true;
}
- if (!trace_state->enabled)
+ if (trace_state->disabled)
goto out;
event = trace_state->event;
@@ -2223,9 +2170,7 @@ int synth_event_trace_end(struct synth_event_trace_state *trace_state)
if (!trace_state)
return -EINVAL;
- trace_event_buffer_commit(&trace_state->fbuffer);
-
- ring_buffer_nest_end(trace_state->buffer);
+ __synth_event_trace_end(trace_state);
return 0;
}
diff --git a/kernel/trace/trace_kprobe.c b/kernel/trace/trace_kprobe.c
index d8264ebb9581..362cca52f5de 100644
--- a/kernel/trace/trace_kprobe.c
+++ b/kernel/trace/trace_kprobe.c
@@ -1012,7 +1012,7 @@ int __kprobe_event_add_fields(struct dynevent_cmd *cmd, ...)
{
struct dynevent_arg arg;
va_list args;
- int ret;
+ int ret = 0;
if (cmd->type != DYNEVENT_TYPE_KPROBE)
return -EINVAL;
diff --git a/lib/Kconfig b/lib/Kconfig
index 0cf875fd627c..bc7e56370129 100644
--- a/lib/Kconfig
+++ b/lib/Kconfig
@@ -573,9 +573,6 @@ config DIMLIB
config LIBFDT
bool
-config LIBXBC
- bool
-
config OID_REGISTRY
tristate
help
diff --git a/lib/Makefile b/lib/Makefile
index 5d64890d6b6a..611872c06926 100644
--- a/lib/Makefile
+++ b/lib/Makefile
@@ -230,7 +230,7 @@ $(foreach file, $(libfdt_files), \
$(eval CFLAGS_$(file) = -I $(srctree)/scripts/dtc/libfdt))
lib-$(CONFIG_LIBFDT) += $(libfdt_files)
-lib-$(CONFIG_LIBXBC) += bootconfig.o
+lib-$(CONFIG_BOOT_CONFIG) += bootconfig.o
obj-$(CONFIG_RBTREE_TEST) += rbtree_test.o
obj-$(CONFIG_INTERVAL_TREE_TEST) += interval_tree_test.o
diff --git a/lib/bootconfig.c b/lib/bootconfig.c
index afb2e767e6fe..3ea601a2eba5 100644
--- a/lib/bootconfig.c
+++ b/lib/bootconfig.c
@@ -6,12 +6,13 @@
#define pr_fmt(fmt) "bootconfig: " fmt
+#include <linux/bootconfig.h>
#include <linux/bug.h>
#include <linux/ctype.h>
#include <linux/errno.h>
#include <linux/kernel.h>
+#include <linux/memblock.h>
#include <linux/printk.h>
-#include <linux/bootconfig.h>
#include <linux/string.h>
/*
@@ -23,7 +24,7 @@
* node (for array).
*/
-static struct xbc_node xbc_nodes[XBC_NODE_MAX] __initdata;
+static struct xbc_node *xbc_nodes __initdata;
static int xbc_node_num __initdata;
static char *xbc_data __initdata;
static size_t xbc_data_size __initdata;
@@ -719,7 +720,8 @@ void __init xbc_destroy_all(void)
xbc_data = NULL;
xbc_data_size = 0;
xbc_node_num = 0;
- memset(xbc_nodes, 0, sizeof(xbc_nodes));
+ memblock_free(__pa(xbc_nodes), sizeof(struct xbc_node) * XBC_NODE_MAX);
+ xbc_nodes = NULL;
}
/**
@@ -748,6 +750,13 @@ int __init xbc_init(char *buf)
return -ERANGE;
}
+ xbc_nodes = memblock_alloc(sizeof(struct xbc_node) * XBC_NODE_MAX,
+ SMP_CACHE_BYTES);
+ if (!xbc_nodes) {
+ pr_err("Failed to allocate memory for bootconfig nodes.\n");
+ return -ENOMEM;
+ }
+ memset(xbc_nodes, 0, sizeof(struct xbc_node) * XBC_NODE_MAX);
xbc_data = buf;
xbc_data_size = ret + 1;
last_parent = NULL;
diff --git a/tools/bootconfig/include/linux/memblock.h b/tools/bootconfig/include/linux/memblock.h
new file mode 100644
index 000000000000..7862f217d85d
--- /dev/null
+++ b/tools/bootconfig/include/linux/memblock.h
@@ -0,0 +1,12 @@
+/* SPDX-License-Identifier: GPL-2.0 */
+#ifndef _XBC_LINUX_MEMBLOCK_H
+#define _XBC_LINUX_MEMBLOCK_H
+
+#include <stdlib.h>
+
+#define __pa(addr) (addr)
+#define SMP_CACHE_BYTES 0
+#define memblock_alloc(size, align) malloc(size)
+#define memblock_free(paddr, size) free(paddr)
+
+#endif
diff --git a/tools/bootconfig/include/linux/printk.h b/tools/bootconfig/include/linux/printk.h
index 017bcd6912a5..e978a63d3222 100644
--- a/tools/bootconfig/include/linux/printk.h
+++ b/tools/bootconfig/include/linux/printk.h
@@ -7,7 +7,7 @@
/* controllable printf */
extern int pr_output;
#define printk(fmt, ...) \
- (pr_output ? printf(fmt, __VA_ARGS__) : 0)
+ (pr_output ? printf(fmt, ##__VA_ARGS__) : 0)
#define pr_err printk
#define pr_warn printk
diff --git a/tools/bootconfig/main.c b/tools/bootconfig/main.c
index 47f488458328..e18eeb070562 100644
--- a/tools/bootconfig/main.c
+++ b/tools/bootconfig/main.c
@@ -140,7 +140,7 @@ int load_xbc_from_initrd(int fd, char **buf)
return 0;
if (lseek(fd, -8, SEEK_END) < 0) {
- printf("Failed to lseek: %d\n", -errno);
+ pr_err("Failed to lseek: %d\n", -errno);
return -errno;
}
@@ -155,7 +155,7 @@ int load_xbc_from_initrd(int fd, char **buf)
return 0;
if (lseek(fd, stat.st_size - 8 - size, SEEK_SET) < 0) {
- printf("Failed to lseek: %d\n", -errno);
+ pr_err("Failed to lseek: %d\n", -errno);
return -errno;
}
@@ -166,7 +166,7 @@ int load_xbc_from_initrd(int fd, char **buf)
/* Wrong Checksum, maybe no boot config here */
rcsum = checksum((unsigned char *)*buf, size);
if (csum != rcsum) {
- printf("checksum error: %d != %d\n", csum, rcsum);
+ pr_err("checksum error: %d != %d\n", csum, rcsum);
return 0;
}
@@ -185,13 +185,13 @@ int show_xbc(const char *path)
fd = open(path, O_RDONLY);
if (fd < 0) {
- printf("Failed to open initrd %s: %d\n", path, fd);
+ pr_err("Failed to open initrd %s: %d\n", path, fd);
return -errno;
}
ret = load_xbc_from_initrd(fd, &buf);
if (ret < 0)
- printf("Failed to load a boot config from initrd: %d\n", ret);
+ pr_err("Failed to load a boot config from initrd: %d\n", ret);
else
xbc_show_compact_tree();
@@ -209,7 +209,7 @@ int delete_xbc(const char *path)
fd = open(path, O_RDWR);
if (fd < 0) {
- printf("Failed to open initrd %s: %d\n", path, fd);
+ pr_err("Failed to open initrd %s: %d\n", path, fd);
return -errno;
}
@@ -222,7 +222,7 @@ int delete_xbc(const char *path)
pr_output = 1;
if (size < 0) {
ret = size;
- printf("Failed to load a boot config from initrd: %d\n", ret);
+ pr_err("Failed to load a boot config from initrd: %d\n", ret);
} else if (size > 0) {
ret = fstat(fd, &stat);
if (!ret)
@@ -245,7 +245,7 @@ int apply_xbc(const char *path, const char *xbc_path)
ret = load_xbc_file(xbc_path, &buf);
if (ret < 0) {
- printf("Failed to load %s : %d\n", xbc_path, ret);
+ pr_err("Failed to load %s : %d\n", xbc_path, ret);
return ret;
}
size = strlen(buf) + 1;
@@ -262,7 +262,7 @@ int apply_xbc(const char *path, const char *xbc_path)
/* Check the data format */
ret = xbc_init(buf);
if (ret < 0) {
- printf("Failed to parse %s: %d\n", xbc_path, ret);
+ pr_err("Failed to parse %s: %d\n", xbc_path, ret);
free(data);
free(buf);
return ret;
@@ -279,20 +279,20 @@ int apply_xbc(const char *path, const char *xbc_path)
/* Remove old boot config if exists */
ret = delete_xbc(path);
if (ret < 0) {
- printf("Failed to delete previous boot config: %d\n", ret);
+ pr_err("Failed to delete previous boot config: %d\n", ret);
return ret;
}
/* Apply new one */
fd = open(path, O_RDWR | O_APPEND);
if (fd < 0) {
- printf("Failed to open %s: %d\n", path, fd);
+ pr_err("Failed to open %s: %d\n", path, fd);
return fd;
}
/* TODO: Ensure the @path is initramfs/initrd image */
ret = write(fd, data, size + 8);
if (ret < 0) {
- printf("Failed to apply a boot config: %d\n", ret);
+ pr_err("Failed to apply a boot config: %d\n", ret);
return ret;
}
close(fd);
@@ -334,12 +334,12 @@ int main(int argc, char **argv)
}
if (apply && delete) {
- printf("Error: You can not specify both -a and -d at once.\n");
+ pr_err("Error: You can not specify both -a and -d at once.\n");
return usage();
}
if (optind >= argc) {
- printf("Error: No initrd is specified.\n");
+ pr_err("Error: No initrd is specified.\n");
return usage();
}
diff --git a/tools/bootconfig/test-bootconfig.sh b/tools/bootconfig/test-bootconfig.sh
index 87725e8723f8..1de06de328e2 100755
--- a/tools/bootconfig/test-bootconfig.sh
+++ b/tools/bootconfig/test-bootconfig.sh
@@ -64,6 +64,15 @@ echo "File size check"
new_size=$(stat -c %s $INITRD)
xpass test $new_size -eq $initrd_size
+echo "No error messge while applying"
+OUTFILE=`mktemp tempout-XXXX`
+dd if=/dev/zero of=$INITRD bs=4096 count=1
+printf " \0\0\0 \0\0\0" >> $INITRD
+$BOOTCONF -a $TEMPCONF $INITRD > $OUTFILE 2>&1
+xfail grep -i "failed" $OUTFILE
+xfail grep -i "error" $OUTFILE
+rm $OUTFILE
+
echo "Max node number check"
echo -n > $TEMPCONF
Copyright © 1996 – 2023 Jason A. Donenfeld. All Rights Reverse Engineered.