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-rw-r--r--Documentation/admin-guide/bootconfig.rst39
-rw-r--r--init/main.c37
-rw-r--r--kernel/trace/trace.c26
-rw-r--r--kernel/trace/trace_boot.c6
-rw-r--r--kernel/trace/trace_eprobe.c5
-rw-r--r--kernel/trace/trace_events.c1
-rw-r--r--kernel/trace/trace_events_hist.c14
-rw-r--r--kernel/trace/trace_osnoise.c6
-rw-r--r--kernel/trace/trace_output.c11
-rw-r--r--kernel/trace/trace_synth.h2
-rw-r--r--tools/bootconfig/main.c4
-rwxr-xr-xtools/bootconfig/scripts/ftrace2bconf.sh4
-rwxr-xr-xtools/bootconfig/test-bootconfig.sh4
-rw-r--r--tools/testing/selftests/ftrace/test.d/dynevent/add_remove_eprobe.tc2
14 files changed, 122 insertions, 39 deletions
diff --git a/Documentation/admin-guide/bootconfig.rst b/Documentation/admin-guide/bootconfig.rst
index 6a79f2e59396..a1860fc0ca88 100644
--- a/Documentation/admin-guide/bootconfig.rst
+++ b/Documentation/admin-guide/bootconfig.rst
@@ -178,7 +178,7 @@ update the boot loader and the kernel image itself as long as the boot
loader passes the correct initrd file size. If by any chance, the boot
loader passes a longer size, the kernel fails to find the bootconfig data.
-To do this operation, Linux kernel provides "bootconfig" command under
+To do this operation, Linux kernel provides ``bootconfig`` command under
tools/bootconfig, which allows admin to apply or delete the config file
to/from initrd image. You can build it by the following command::
@@ -196,6 +196,43 @@ To remove the config from the image, you can use -d option as below::
Then add "bootconfig" on the normal kernel command line to tell the
kernel to look for the bootconfig at the end of the initrd file.
+
+Kernel parameters via Boot Config
+=================================
+
+In addition to the kernel command line, the boot config can be used for
+passing the kernel parameters. All the key-value pairs under ``kernel``
+key will be passed to kernel cmdline directly. Moreover, the key-value
+pairs under ``init`` will be passed to init process via the cmdline.
+The parameters are concatinated with user-given kernel cmdline string
+as the following order, so that the command line parameter can override
+bootconfig parameters (this depends on how the subsystem handles parameters
+but in general, earlier parameter will be overwritten by later one.)::
+
+ [bootconfig params][cmdline params] -- [bootconfig init params][cmdline init params]
+
+Here is an example of the bootconfig file for kernel/init parameters.::
+
+ kernel {
+ root = 01234567-89ab-cdef-0123-456789abcd
+ }
+ init {
+ splash
+ }
+
+This will be copied into the kernel cmdline string as the following::
+
+ root="01234567-89ab-cdef-0123-456789abcd" -- splash
+
+If user gives some other command line like,::
+
+ ro bootconfig -- quiet
+
+The final kernel cmdline will be the following::
+
+ root="01234567-89ab-cdef-0123-456789abcd" ro bootconfig -- splash quiet
+
+
Config File Limitation
======================
diff --git a/init/main.c b/init/main.c
index 733e1471d95f..5c9a48df90e1 100644
--- a/init/main.c
+++ b/init/main.c
@@ -153,10 +153,10 @@ static char *extra_init_args;
#ifdef CONFIG_BOOT_CONFIG
/* Is bootconfig on command line? */
static bool bootconfig_found;
-static bool initargs_found;
+static size_t initargs_offs;
#else
# define bootconfig_found false
-# define initargs_found false
+# define initargs_offs 0
#endif
static char *execute_command;
@@ -422,9 +422,9 @@ static void __init setup_boot_config(void)
if (IS_ERR(err) || !bootconfig_found)
return;
- /* parse_args() stops at '--' and returns an address */
+ /* parse_args() stops at the next param of '--' and returns an address */
if (err)
- initargs_found = true;
+ initargs_offs = err - tmp_cmdline;
if (!data) {
pr_err("'bootconfig' found on command line, but no bootconfig found\n");
@@ -468,7 +468,12 @@ static void __init setup_boot_config(void)
return;
}
-#else
+static void __init exit_boot_config(void)
+{
+ xbc_destroy_all();
+}
+
+#else /* !CONFIG_BOOT_CONFIG */
static void __init setup_boot_config(void)
{
@@ -481,7 +486,11 @@ static int __init warn_bootconfig(char *str)
pr_warn("WARNING: 'bootconfig' found on the kernel command line but CONFIG_BOOT_CONFIG is not set.\n");
return 0;
}
-#endif
+
+#define exit_boot_config() do {} while (0)
+
+#endif /* CONFIG_BOOT_CONFIG */
+
early_param("bootconfig", warn_bootconfig);
/* Change NUL term back to "=", to make "param" the whole string. */
@@ -646,16 +655,21 @@ static void __init setup_command_line(char *command_line)
* Append supplemental init boot args to saved_command_line
* so that user can check what command line options passed
* to init.
+ * The order should always be
+ * " -- "[bootconfig init-param][cmdline init-param]
*/
- len = strlen(saved_command_line);
- if (initargs_found) {
- saved_command_line[len++] = ' ';
+ if (initargs_offs) {
+ len = xlen + initargs_offs;
+ strcpy(saved_command_line + len, extra_init_args);
+ len += ilen - 4; /* strlen(extra_init_args) */
+ strcpy(saved_command_line + len,
+ boot_command_line + initargs_offs - 1);
} else {
+ len = strlen(saved_command_line);
strcpy(saved_command_line + len, " -- ");
len += 4;
+ strcpy(saved_command_line + len, extra_init_args);
}
-
- strcpy(saved_command_line + len, extra_init_args);
}
}
@@ -1494,6 +1508,7 @@ static int __ref kernel_init(void *unused)
kprobe_free_init_mem();
ftrace_free_init_mem();
kgdb_free_init_mem();
+ exit_boot_config();
free_initmem();
mark_readonly();
diff --git a/kernel/trace/trace.c b/kernel/trace/trace.c
index 2dbf797aa133..7896d30d90f7 100644
--- a/kernel/trace/trace.c
+++ b/kernel/trace/trace.c
@@ -2603,6 +2603,15 @@ enum print_line_t trace_handle_return(struct trace_seq *s)
}
EXPORT_SYMBOL_GPL(trace_handle_return);
+static unsigned short migration_disable_value(void)
+{
+#if defined(CONFIG_SMP)
+ return current->migration_disabled;
+#else
+ return 0;
+#endif
+}
+
unsigned int tracing_gen_ctx_irq_test(unsigned int irqs_status)
{
unsigned int trace_flags = irqs_status;
@@ -2621,7 +2630,8 @@ unsigned int tracing_gen_ctx_irq_test(unsigned int irqs_status)
trace_flags |= TRACE_FLAG_NEED_RESCHED;
if (test_preempt_need_resched())
trace_flags |= TRACE_FLAG_PREEMPT_RESCHED;
- return (trace_flags << 16) | (pc & 0xff);
+ return (trace_flags << 16) | (min_t(unsigned int, pc & 0xff, 0xf)) |
+ (min_t(unsigned int, migration_disable_value(), 0xf)) << 4;
}
struct ring_buffer_event *
@@ -4189,9 +4199,10 @@ static void print_lat_help_header(struct seq_file *m)
"# | / _----=> need-resched \n"
"# || / _---=> hardirq/softirq \n"
"# ||| / _--=> preempt-depth \n"
- "# |||| / delay \n"
- "# cmd pid ||||| time | caller \n"
- "# \\ / ||||| \\ | / \n");
+ "# |||| / _-=> migrate-disable \n"
+ "# ||||| / delay \n"
+ "# cmd pid |||||| time | caller \n"
+ "# \\ / |||||| \\ | / \n");
}
static void print_event_info(struct array_buffer *buf, struct seq_file *m)
@@ -4229,9 +4240,10 @@ static void print_func_help_header_irq(struct array_buffer *buf, struct seq_file
seq_printf(m, "# %.*s / _----=> need-resched\n", prec, space);
seq_printf(m, "# %.*s| / _---=> hardirq/softirq\n", prec, space);
seq_printf(m, "# %.*s|| / _--=> preempt-depth\n", prec, space);
- seq_printf(m, "# %.*s||| / delay\n", prec, space);
- seq_printf(m, "# TASK-PID %.*s CPU# |||| TIMESTAMP FUNCTION\n", prec, " TGID ");
- seq_printf(m, "# | | %.*s | |||| | |\n", prec, " | ");
+ seq_printf(m, "# %.*s||| / _-=> migrate-disable\n", prec, space);
+ seq_printf(m, "# %.*s|||| / delay\n", prec, space);
+ seq_printf(m, "# TASK-PID %.*s CPU# ||||| TIMESTAMP FUNCTION\n", prec, " TGID ");
+ seq_printf(m, "# | | %.*s | ||||| | |\n", prec, " | ");
}
void
diff --git a/kernel/trace/trace_boot.c b/kernel/trace/trace_boot.c
index 1060b0446032..388e65d05978 100644
--- a/kernel/trace/trace_boot.c
+++ b/kernel/trace/trace_boot.c
@@ -522,14 +522,14 @@ trace_boot_init_events(struct trace_array *tr, struct xbc_node *node)
if (!node)
return;
/* per-event key starts with "event.GROUP.EVENT" */
- xbc_node_for_each_child(node, gnode) {
+ xbc_node_for_each_subkey(node, gnode) {
data = xbc_node_get_data(gnode);
if (!strcmp(data, "enable")) {
enable_all = true;
continue;
}
enable = false;
- xbc_node_for_each_child(gnode, enode) {
+ xbc_node_for_each_subkey(gnode, enode) {
data = xbc_node_get_data(enode);
if (!strcmp(data, "enable")) {
enable = true;
@@ -625,7 +625,7 @@ trace_boot_init_instances(struct xbc_node *node)
if (!node)
return;
- xbc_node_for_each_child(node, inode) {
+ xbc_node_for_each_subkey(node, inode) {
p = xbc_node_get_data(inode);
if (!p || *p == '\0')
continue;
diff --git a/kernel/trace/trace_eprobe.c b/kernel/trace/trace_eprobe.c
index 56a96e9750cf..3044b762cbd7 100644
--- a/kernel/trace/trace_eprobe.c
+++ b/kernel/trace/trace_eprobe.c
@@ -151,7 +151,7 @@ static struct trace_eprobe *alloc_event_probe(const char *group,
ep = kzalloc(struct_size(ep, tp.args, nargs), GFP_KERNEL);
if (!ep) {
- trace_event_put_ref(ep->event);
+ trace_event_put_ref(event);
goto error;
}
ep->event = event;
@@ -851,7 +851,8 @@ static int __trace_eprobe_create(int argc, const char *argv[])
ret = PTR_ERR(ep);
/* This must return -ENOMEM, else there is a bug */
WARN_ON_ONCE(ret != -ENOMEM);
- goto error; /* We know ep is not allocated */
+ ep = NULL;
+ goto error;
}
argc -= 2; argv += 2;
diff --git a/kernel/trace/trace_events.c b/kernel/trace/trace_events.c
index 1349b6de5eeb..830b3b9940f4 100644
--- a/kernel/trace/trace_events.c
+++ b/kernel/trace/trace_events.c
@@ -181,6 +181,7 @@ static int trace_define_common_fields(void)
__common_field(unsigned short, type);
__common_field(unsigned char, flags);
+ /* Holds both preempt_count and migrate_disable */
__common_field(unsigned char, preempt_count);
__common_field(int, pid);
diff --git a/kernel/trace/trace_events_hist.c b/kernel/trace/trace_events_hist.c
index 9d91b1c06957..a6061a69aa84 100644
--- a/kernel/trace/trace_events_hist.c
+++ b/kernel/trace/trace_events_hist.c
@@ -508,7 +508,8 @@ struct track_data {
struct hist_elt_data {
char *comm;
u64 *var_ref_vals;
- char *field_var_str[SYNTH_FIELDS_MAX];
+ char **field_var_str;
+ int n_field_var_str;
};
struct snapshot_context {
@@ -1401,9 +1402,11 @@ static void hist_elt_data_free(struct hist_elt_data *elt_data)
{
unsigned int i;
- for (i = 0; i < SYNTH_FIELDS_MAX; i++)
+ for (i = 0; i < elt_data->n_field_var_str; i++)
kfree(elt_data->field_var_str[i]);
+ kfree(elt_data->field_var_str);
+
kfree(elt_data->comm);
kfree(elt_data);
}
@@ -1451,6 +1454,13 @@ static int hist_trigger_elt_data_alloc(struct tracing_map_elt *elt)
size = STR_VAR_LEN_MAX;
+ elt_data->field_var_str = kcalloc(n_str, sizeof(char *), GFP_KERNEL);
+ if (!elt_data->field_var_str) {
+ hist_elt_data_free(elt_data);
+ return -EINVAL;
+ }
+ elt_data->n_field_var_str = n_str;
+
for (i = 0; i < n_str; i++) {
elt_data->field_var_str[i] = kzalloc(size, GFP_KERNEL);
if (!elt_data->field_var_str[i]) {
diff --git a/kernel/trace/trace_osnoise.c b/kernel/trace/trace_osnoise.c
index 65b08b8e5bf8..ce053619f289 100644
--- a/kernel/trace/trace_osnoise.c
+++ b/kernel/trace/trace_osnoise.c
@@ -1548,7 +1548,7 @@ static int start_kthread(unsigned int cpu)
static int start_per_cpu_kthreads(struct trace_array *tr)
{
struct cpumask *current_mask = &save_cpumask;
- int retval;
+ int retval = 0;
int cpu;
cpus_read_lock();
@@ -1568,13 +1568,13 @@ static int start_per_cpu_kthreads(struct trace_array *tr)
retval = start_kthread(cpu);
if (retval) {
stop_per_cpu_kthreads();
- return retval;
+ break;
}
}
cpus_read_unlock();
- return 0;
+ return retval;
}
#ifdef CONFIG_HOTPLUG_CPU
diff --git a/kernel/trace/trace_output.c b/kernel/trace/trace_output.c
index a0bf446bb034..c2ca40e8595b 100644
--- a/kernel/trace/trace_output.c
+++ b/kernel/trace/trace_output.c
@@ -492,8 +492,13 @@ int trace_print_lat_fmt(struct trace_seq *s, struct trace_entry *entry)
trace_seq_printf(s, "%c%c%c",
irqs_off, need_resched, hardsoft_irq);
- if (entry->preempt_count)
- trace_seq_printf(s, "%x", entry->preempt_count);
+ if (entry->preempt_count & 0xf)
+ trace_seq_printf(s, "%x", entry->preempt_count & 0xf);
+ else
+ trace_seq_putc(s, '.');
+
+ if (entry->preempt_count & 0xf0)
+ trace_seq_printf(s, "%x", entry->preempt_count >> 4);
else
trace_seq_putc(s, '.');
@@ -656,7 +661,7 @@ int trace_print_lat_context(struct trace_iterator *iter)
trace_seq_printf(
s, "%16s %7d %3d %d %08x %08lx ",
comm, entry->pid, iter->cpu, entry->flags,
- entry->preempt_count, iter->idx);
+ entry->preempt_count & 0xf, iter->idx);
} else {
lat_print_generic(s, entry, iter->cpu);
}
diff --git a/kernel/trace/trace_synth.h b/kernel/trace/trace_synth.h
index 4007fe95cf42..b29595fe3ac5 100644
--- a/kernel/trace/trace_synth.h
+++ b/kernel/trace/trace_synth.h
@@ -5,7 +5,7 @@
#include "trace_dynevent.h"
#define SYNTH_SYSTEM "synthetic"
-#define SYNTH_FIELDS_MAX 32
+#define SYNTH_FIELDS_MAX 64
#define STR_VAR_LEN_MAX MAX_FILTER_STR_VAL /* must be multiple of sizeof(u64) */
diff --git a/tools/bootconfig/main.c b/tools/bootconfig/main.c
index f45fa992e01d..fd67496a947f 100644
--- a/tools/bootconfig/main.c
+++ b/tools/bootconfig/main.c
@@ -111,9 +111,11 @@ static void xbc_show_list(void)
char key[XBC_KEYLEN_MAX];
struct xbc_node *leaf;
const char *val;
+ int ret;
xbc_for_each_key_value(leaf, val) {
- if (xbc_node_compose_key(leaf, key, XBC_KEYLEN_MAX) < 0) {
+ ret = xbc_node_compose_key(leaf, key, XBC_KEYLEN_MAX);
+ if (ret < 0) {
fprintf(stderr, "Failed to compose key %d\n", ret);
break;
}
diff --git a/tools/bootconfig/scripts/ftrace2bconf.sh b/tools/bootconfig/scripts/ftrace2bconf.sh
index fbaf07dc91bf..6183b36c6846 100755
--- a/tools/bootconfig/scripts/ftrace2bconf.sh
+++ b/tools/bootconfig/scripts/ftrace2bconf.sh
@@ -239,8 +239,8 @@ instance_options() { # [instance-name]
emit_kv $PREFIX.cpumask = $val
fi
val=`cat $INSTANCE/tracing_on`
- if [ `echo $val | sed -e s/f//g`x != x ]; then
- emit_kv $PREFIX.tracing_on = $val
+ if [ "$val" = "0" ]; then
+ emit_kv $PREFIX.tracing_on = 0
fi
val=`cat $INSTANCE/current_tracer`
diff --git a/tools/bootconfig/test-bootconfig.sh b/tools/bootconfig/test-bootconfig.sh
index baed891d0ba4..f68e2e9eef8b 100755
--- a/tools/bootconfig/test-bootconfig.sh
+++ b/tools/bootconfig/test-bootconfig.sh
@@ -26,7 +26,7 @@ trap cleanup EXIT TERM
NO=1
xpass() { # pass test command
- echo "test case $NO ($3)... "
+ echo "test case $NO ($*)... "
if ! ($@ && echo "\t\t[OK]"); then
echo "\t\t[NG]"; NG=$((NG + 1))
fi
@@ -34,7 +34,7 @@ xpass() { # pass test command
}
xfail() { # fail test command
- echo "test case $NO ($3)... "
+ echo "test case $NO ($*)... "
if ! (! $@ && echo "\t\t[OK]"); then
echo "\t\t[NG]"; NG=$((NG + 1))
fi
diff --git a/tools/testing/selftests/ftrace/test.d/dynevent/add_remove_eprobe.tc b/tools/testing/selftests/ftrace/test.d/dynevent/add_remove_eprobe.tc
index 25a3da4eaa44..5f5b2ba3e557 100644
--- a/tools/testing/selftests/ftrace/test.d/dynevent/add_remove_eprobe.tc
+++ b/tools/testing/selftests/ftrace/test.d/dynevent/add_remove_eprobe.tc
@@ -22,7 +22,7 @@ ls
echo 0 > events/eprobes/$EPROBE/enable
content=`grep '^ *ls-' trace | grep 'file='`
-nocontent=`grep '^ *ls-' trace | grep 'file=' | grep -v -e '"/' -e '"."'` || true
+nocontent=`grep '^ *ls-' trace | grep 'file=' | grep -v -e '"/' -e '"."' -e '(fault)' ` || true
if [ -z "$content" ]; then
exit_fail
generated by cgit v1.2.3 (git 2.39.0) at 2024-06-02 22:10:35 +0300