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-rw-r--r--Documentation/admin-guide/kdump/gdbmacros.txt73
-rw-r--r--drivers/base/core.c46
-rw-r--r--include/linux/dev_printk.h8
-rw-r--r--include/linux/printk.h6
-rw-r--r--kernel/printk/internal.h4
-rw-r--r--kernel/printk/printk.c166
-rw-r--r--kernel/printk/printk_ringbuffer.h3
-rw-r--r--kernel/printk/printk_safe.c2
-rw-r--r--scripts/gdb/linux/dmesg.py16
9 files changed, 164 insertions, 160 deletions
diff --git a/Documentation/admin-guide/kdump/gdbmacros.txt b/Documentation/admin-guide/kdump/gdbmacros.txt
index 94fabb165abf..82aecdcae8a6 100644
--- a/Documentation/admin-guide/kdump/gdbmacros.txt
+++ b/Documentation/admin-guide/kdump/gdbmacros.txt
@@ -172,13 +172,13 @@ end
define dump_record
set var $desc = $arg0
- if ($argc > 1)
- set var $prev_flags = $arg1
+ set var $info = $arg1
+ if ($argc > 2)
+ set var $prev_flags = $arg2
else
set var $prev_flags = 0
end
- set var $info = &$desc->info
set var $prefix = 1
set var $newline = 1
@@ -237,44 +237,36 @@ define dump_record
# handle dictionary data
- set var $begin = $desc->dict_blk_lpos.begin % (1U << prb->dict_data_ring.size_bits)
- set var $next = $desc->dict_blk_lpos.next % (1U << prb->dict_data_ring.size_bits)
-
- # handle data-less record
- if ($begin & 1)
- set var $dict_len = 0
- set var $dict = ""
- else
- # handle wrapping data block
- if ($begin > $next)
- set var $begin = 0
- end
-
- # skip over descriptor id
- set var $begin = $begin + sizeof(long)
-
- # handle truncated message
- if ($next - $begin < $info->dict_len)
- set var $dict_len = $next - $begin
- else
- set var $dict_len = $info->dict_len
+ set var $dict = &$info->dev_info.subsystem[0]
+ set var $dict_len = sizeof($info->dev_info.subsystem)
+ if ($dict[0] != '\0')
+ printf " SUBSYSTEM="
+ set var $idx = 0
+ while ($idx < $dict_len)
+ set var $c = $dict[$idx]
+ if ($c == '\0')
+ loop_break
+ else
+ if ($c < ' ' || $c >= 127 || $c == '\\')
+ printf "\\x%02x", $c
+ else
+ printf "%c", $c
+ end
+ end
+ set var $idx = $idx + 1
end
-
- set var $dict = &prb->dict_data_ring.data[$begin]
+ printf "\n"
end
- if ($dict_len > 0)
+ set var $dict = &$info->dev_info.device[0]
+ set var $dict_len = sizeof($info->dev_info.device)
+ if ($dict[0] != '\0')
+ printf " DEVICE="
set var $idx = 0
- set var $line = 1
while ($idx < $dict_len)
- if ($line)
- printf " "
- set var $line = 0
- end
set var $c = $dict[$idx]
if ($c == '\0')
- printf "\n"
- set var $line = 1
+ loop_break
else
if ($c < ' ' || $c >= 127 || $c == '\\')
printf "\\x%02x", $c
@@ -288,10 +280,10 @@ define dump_record
end
end
document dump_record
- Dump a single record. The first parameter is the descriptor
- sequence number, the second is optional and specifies the
- previous record's flags, used for properly formatting
- continued lines.
+ Dump a single record. The first parameter is the descriptor,
+ the second parameter is the info, the third parameter is
+ optional and specifies the previous record's flags, used for
+ properly formatting continued lines.
end
define dmesg
@@ -311,12 +303,13 @@ define dmesg
while (1)
set var $desc = &prb->desc_ring.descs[$id % $desc_count]
+ set var $info = &prb->desc_ring.infos[$id % $desc_count]
# skip non-committed record
set var $state = 3 & ($desc->state_var.counter >> $desc_flags_shift)
if ($state == $desc_committed || $state == $desc_finalized)
- dump_record $desc $prev_flags
- set var $prev_flags = $desc->info.flags
+ dump_record $desc $info $prev_flags
+ set var $prev_flags = $info->flags
end
set var $id = ($id + 1) & $id_mask
diff --git a/drivers/base/core.c b/drivers/base/core.c
index 67d39a90b45c..22d83aedb64e 100644
--- a/drivers/base/core.c
+++ b/drivers/base/core.c
@@ -3815,22 +3815,21 @@ void device_shutdown(void)
*/
#ifdef CONFIG_PRINTK
-static int
-create_syslog_header(const struct device *dev, char *hdr, size_t hdrlen)
+static void
+set_dev_info(const struct device *dev, struct dev_printk_info *dev_info)
{
const char *subsys;
- size_t pos = 0;
+
+ memset(dev_info, 0, sizeof(*dev_info));
if (dev->class)
subsys = dev->class->name;
else if (dev->bus)
subsys = dev->bus->name;
else
- return 0;
+ return;
- pos += snprintf(hdr + pos, hdrlen - pos, "SUBSYSTEM=%s", subsys);
- if (pos >= hdrlen)
- goto overflow;
+ strscpy(dev_info->subsystem, subsys, sizeof(dev_info->subsystem));
/*
* Add device identifier DEVICE=:
@@ -3846,41 +3845,28 @@ create_syslog_header(const struct device *dev, char *hdr, size_t hdrlen)
c = 'b';
else
c = 'c';
- pos++;
- pos += snprintf(hdr + pos, hdrlen - pos,
- "DEVICE=%c%u:%u",
- c, MAJOR(dev->devt), MINOR(dev->devt));
+
+ snprintf(dev_info->device, sizeof(dev_info->device),
+ "%c%u:%u", c, MAJOR(dev->devt), MINOR(dev->devt));
} else if (strcmp(subsys, "net") == 0) {
struct net_device *net = to_net_dev(dev);
- pos++;
- pos += snprintf(hdr + pos, hdrlen - pos,
- "DEVICE=n%u", net->ifindex);
+ snprintf(dev_info->device, sizeof(dev_info->device),
+ "n%u", net->ifindex);
} else {
- pos++;
- pos += snprintf(hdr + pos, hdrlen - pos,
- "DEVICE=+%s:%s", subsys, dev_name(dev));
+ snprintf(dev_info->device, sizeof(dev_info->device),
+ "+%s:%s", subsys, dev_name(dev));
}
-
- if (pos >= hdrlen)
- goto overflow;
-
- return pos;
-
-overflow:
- dev_WARN(dev, "device/subsystem name too long");
- return 0;
}
int dev_vprintk_emit(int level, const struct device *dev,
const char *fmt, va_list args)
{
- char hdr[128];
- size_t hdrlen;
+ struct dev_printk_info dev_info;
- hdrlen = create_syslog_header(dev, hdr, sizeof(hdr));
+ set_dev_info(dev, &dev_info);
- return vprintk_emit(0, level, hdrlen ? hdr : NULL, hdrlen, fmt, args);
+ return vprintk_emit(0, level, &dev_info, fmt, args);
}
EXPORT_SYMBOL(dev_vprintk_emit);
diff --git a/include/linux/dev_printk.h b/include/linux/dev_printk.h
index 3028b644b4fb..6f009559ee54 100644
--- a/include/linux/dev_printk.h
+++ b/include/linux/dev_printk.h
@@ -21,6 +21,14 @@
struct device;
+#define PRINTK_INFO_SUBSYSTEM_LEN 16
+#define PRINTK_INFO_DEVICE_LEN 48
+
+struct dev_printk_info {
+ char subsystem[PRINTK_INFO_SUBSYSTEM_LEN];
+ char device[PRINTK_INFO_DEVICE_LEN];
+};
+
#ifdef CONFIG_PRINTK
__printf(3, 0) __cold
diff --git a/include/linux/printk.h b/include/linux/printk.h
index fc8f03c54543..071500ee7281 100644
--- a/include/linux/printk.h
+++ b/include/linux/printk.h
@@ -158,10 +158,12 @@ static inline void printk_nmi_direct_enter(void) { }
static inline void printk_nmi_direct_exit(void) { }
#endif /* PRINTK_NMI */
+struct dev_printk_info;
+
#ifdef CONFIG_PRINTK
-asmlinkage __printf(5, 0)
+asmlinkage __printf(4, 0)
int vprintk_emit(int facility, int level,
- const char *dict, size_t dictlen,
+ const struct dev_printk_info *dev_info,
const char *fmt, va_list args);
asmlinkage __printf(1, 0)
diff --git a/kernel/printk/internal.h b/kernel/printk/internal.h
index 660f9a6bf73a..3a8fd491758c 100644
--- a/kernel/printk/internal.h
+++ b/kernel/printk/internal.h
@@ -14,9 +14,9 @@
extern raw_spinlock_t logbuf_lock;
-__printf(5, 0)
+__printf(4, 0)
int vprintk_store(int facility, int level,
- const char *dict, size_t dictlen,
+ const struct dev_printk_info *dev_info,
const char *fmt, va_list args);
__printf(1, 0) int vprintk_default(const char *fmt, va_list args);
diff --git a/kernel/printk/printk.c b/kernel/printk/printk.c
index 25cfe4fe48af..f1e243cc284a 100644
--- a/kernel/printk/printk.c
+++ b/kernel/printk/printk.c
@@ -296,8 +296,8 @@ static int console_msg_format = MSG_FORMAT_DEFAULT;
/*
* The printk log buffer consists of a sequenced collection of records, each
- * containing variable length message and dictionary text. Every record
- * also contains its own meta-data (@info).
+ * containing variable length message text. Every record also contains its
+ * own meta-data (@info).
*
* Every record meta-data carries the timestamp in microseconds, as well as
* the standard userspace syslog level and syslog facility. The usual kernel
@@ -310,9 +310,7 @@ static int console_msg_format = MSG_FORMAT_DEFAULT;
* terminated.
*
* Optionally, a record can carry a dictionary of properties (key/value
- * pairs), to provide userspace with a machine-readable message context. The
- * length of the dictionary is available in @dict_len. The dictionary is not
- * terminated.
+ * pairs), to provide userspace with a machine-readable message context.
*
* Examples for well-defined, commonly used property names are:
* DEVICE=b12:8 device identifier
@@ -322,21 +320,20 @@ static int console_msg_format = MSG_FORMAT_DEFAULT;
* +sound:card0 subsystem:devname
* SUBSYSTEM=pci driver-core subsystem name
*
- * Valid characters in property names are [a-zA-Z0-9.-_]. The plain text value
- * follows directly after a '=' character. Every property is terminated by
- * a '\0' character. The last property is not terminated.
+ * Valid characters in property names are [a-zA-Z0-9.-_]. Property names
+ * and values are terminated by a '\0' character.
*
* Example of record values:
- * record.text_buf = "it's a line" (unterminated)
- * record.dict_buf = "DEVICE=b8:2\0DRIVER=bug" (unterminated)
- * record.info.seq = 56
- * record.info.ts_nsec = 36863
- * record.info.text_len = 11
- * record.info.dict_len = 22
- * record.info.facility = 0 (LOG_KERN)
- * record.info.flags = 0
- * record.info.level = 3 (LOG_ERR)
- * record.info.caller_id = 299 (task 299)
+ * record.text_buf = "it's a line" (unterminated)
+ * record.info.seq = 56
+ * record.info.ts_nsec = 36863
+ * record.info.text_len = 11
+ * record.info.facility = 0 (LOG_KERN)
+ * record.info.flags = 0
+ * record.info.level = 3 (LOG_ERR)
+ * record.info.caller_id = 299 (task 299)
+ * record.info.dev_info.subsystem = "pci" (terminated)
+ * record.info.dev_info.device = "+pci:0000:00:01.0" (terminated)
*
* The 'struct printk_info' buffer must never be directly exported to
* userspace, it is a kernel-private implementation detail that might
@@ -498,19 +495,19 @@ static void truncate_msg(u16 *text_len, u16 *trunc_msg_len)
/* insert record into the buffer, discard old ones, update heads */
static int log_store(u32 caller_id, int facility, int level,
enum log_flags flags, u64 ts_nsec,
- const char *dict, u16 dict_len,
+ const struct dev_printk_info *dev_info,
const char *text, u16 text_len)
{
struct prb_reserved_entry e;
struct printk_record r;
u16 trunc_msg_len = 0;
- prb_rec_init_wr(&r, text_len, dict_len);
+ prb_rec_init_wr(&r, text_len, 0);
if (!prb_reserve(&e, prb, &r)) {
/* truncate the message if it is too long for empty buffer */
truncate_msg(&text_len, &trunc_msg_len);
- prb_rec_init_wr(&r, text_len + trunc_msg_len, dict_len);
+ prb_rec_init_wr(&r, text_len + trunc_msg_len, 0);
/* survive when the log buffer is too small for trunc_msg */
if (!prb_reserve(&e, prb, &r))
return 0;
@@ -521,10 +518,6 @@ static int log_store(u32 caller_id, int facility, int level,
if (trunc_msg_len)
memcpy(&r.text_buf[text_len], trunc_msg, trunc_msg_len);
r.info->text_len = text_len + trunc_msg_len;
- if (r.dict_buf) {
- memcpy(&r.dict_buf[0], dict, dict_len);
- r.info->dict_len = dict_len;
- }
r.info->facility = facility;
r.info->level = level & 7;
r.info->flags = flags & 0x1f;
@@ -533,6 +526,8 @@ static int log_store(u32 caller_id, int facility, int level,
else
r.info->ts_nsec = local_clock();
r.info->caller_id = caller_id;
+ if (dev_info)
+ memcpy(&r.info->dev_info, dev_info, sizeof(r.info->dev_info));
/* insert message */
if ((flags & LOG_CONT) || !(flags & LOG_NEWLINE))
@@ -613,9 +608,9 @@ static ssize_t info_print_ext_header(char *buf, size_t size,
ts_usec, info->flags & LOG_CONT ? 'c' : '-', caller);
}
-static ssize_t msg_print_ext_body(char *buf, size_t size,
- char *dict, size_t dict_len,
- char *text, size_t text_len)
+static ssize_t msg_add_ext_text(char *buf, size_t size,
+ const char *text, size_t text_len,
+ unsigned char endc)
{
char *p = buf, *e = buf + size;
size_t i;
@@ -629,36 +624,44 @@ static ssize_t msg_print_ext_body(char *buf, size_t size,
else
append_char(&p, e, c);
}
- append_char(&p, e, '\n');
+ append_char(&p, e, endc);
- if (dict_len) {
- bool line = true;
+ return p - buf;
+}
- for (i = 0; i < dict_len; i++) {
- unsigned char c = dict[i];
+static ssize_t msg_add_dict_text(char *buf, size_t size,
+ const char *key, const char *val)
+{
+ size_t val_len = strlen(val);
+ ssize_t len;
- if (line) {
- append_char(&p, e, ' ');
- line = false;
- }
+ if (!val_len)
+ return 0;
- if (c == '\0') {
- append_char(&p, e, '\n');
- line = true;
- continue;
- }
+ len = msg_add_ext_text(buf, size, "", 0, ' '); /* dict prefix */
+ len += msg_add_ext_text(buf + len, size - len, key, strlen(key), '=');
+ len += msg_add_ext_text(buf + len, size - len, val, val_len, '\n');
- if (c < ' ' || c >= 127 || c == '\\') {
- p += scnprintf(p, e - p, "\\x%02x", c);
- continue;
- }
+ return len;
+}
- append_char(&p, e, c);
- }
- append_char(&p, e, '\n');
- }
+static ssize_t msg_print_ext_body(char *buf, size_t size,
+ char *text, size_t text_len,
+ struct dev_printk_info *dev_info)
+{
+ ssize_t len;
- return p - buf;
+ len = msg_add_ext_text(buf, size, text, text_len, '\n');
+
+ if (!dev_info)
+ goto out;
+
+ len += msg_add_dict_text(buf + len, size - len, "SUBSYSTEM",
+ dev_info->subsystem);
+ len += msg_add_dict_text(buf + len, size - len, "DEVICE",
+ dev_info->device);
+out:
+ return len;
}
/* /dev/kmsg - userspace message inject/listen interface */
@@ -670,7 +673,6 @@ struct devkmsg_user {
struct printk_info info;
char text_buf[CONSOLE_EXT_LOG_MAX];
- char dict_buf[CONSOLE_EXT_LOG_MAX];
struct printk_record record;
};
@@ -681,7 +683,7 @@ int devkmsg_emit(int facility, int level, const char *fmt, ...)
int r;
va_start(args, fmt);
- r = vprintk_emit(facility, level, NULL, 0, fmt, args);
+ r = vprintk_emit(facility, level, NULL, fmt, args);
va_end(args);
return r;
@@ -791,8 +793,8 @@ static ssize_t devkmsg_read(struct file *file, char __user *buf,
len = info_print_ext_header(user->buf, sizeof(user->buf), r->info);
len += msg_print_ext_body(user->buf + len, sizeof(user->buf) - len,
- &r->dict_buf[0], r->info->dict_len,
- &r->text_buf[0], r->info->text_len);
+ &r->text_buf[0], r->info->text_len,
+ &r->info->dev_info);
user->seq = r->info->seq + 1;
logbuf_unlock_irq();
@@ -897,7 +899,7 @@ static int devkmsg_open(struct inode *inode, struct file *file)
prb_rec_init_rd(&user->record, &user->info,
&user->text_buf[0], sizeof(user->text_buf),
- &user->dict_buf[0], sizeof(user->dict_buf));
+ NULL, 0);
logbuf_lock_irq();
user->seq = prb_first_valid_seq(prb);
@@ -941,6 +943,8 @@ const struct file_operations kmsg_fops = {
*/
void log_buf_vmcoreinfo_setup(void)
{
+ struct dev_printk_info *dev_info = NULL;
+
VMCOREINFO_SYMBOL(prb);
VMCOREINFO_SYMBOL(printk_rb_static);
VMCOREINFO_SYMBOL(clear_seq);
@@ -978,6 +982,13 @@ void log_buf_vmcoreinfo_setup(void)
VMCOREINFO_OFFSET(printk_info, text_len);
VMCOREINFO_OFFSET(printk_info, dict_len);
VMCOREINFO_OFFSET(printk_info, caller_id);
+ VMCOREINFO_OFFSET(printk_info, dev_info);
+
+ VMCOREINFO_STRUCT_SIZE(dev_printk_info);
+ VMCOREINFO_OFFSET(dev_printk_info, subsystem);
+ VMCOREINFO_LENGTH(printk_info_subsystem, sizeof(dev_info->subsystem));
+ VMCOREINFO_OFFSET(dev_printk_info, device);
+ VMCOREINFO_LENGTH(printk_info_device, sizeof(dev_info->device));
VMCOREINFO_STRUCT_SIZE(prb_data_ring);
VMCOREINFO_OFFSET(prb_data_ring, size_bits);
@@ -1070,22 +1081,19 @@ static unsigned int __init add_to_rb(struct printk_ringbuffer *rb,
struct prb_reserved_entry e;
struct printk_record dest_r;
- prb_rec_init_wr(&dest_r, r->info->text_len, r->info->dict_len);
+ prb_rec_init_wr(&dest_r, r->info->text_len, 0);
if (!prb_reserve(&e, rb, &dest_r))
return 0;
memcpy(&dest_r.text_buf[0], &r->text_buf[0], r->info->text_len);
dest_r.info->text_len = r->info->text_len;
- if (dest_r.dict_buf) {
- memcpy(&dest_r.dict_buf[0], &r->dict_buf[0], r->info->dict_len);
- dest_r.info->dict_len = r->info->dict_len;
- }
dest_r.info->facility = r->info->facility;
dest_r.info->level = r->info->level;
dest_r.info->flags = r->info->flags;
dest_r.info->ts_nsec = r->info->ts_nsec;
dest_r.info->caller_id = r->info->caller_id;
+ memcpy(&dest_r.info->dev_info, &r->info->dev_info, sizeof(dest_r.info->dev_info));
prb_final_commit(&e);
@@ -1093,7 +1101,6 @@ static unsigned int __init add_to_rb(struct printk_ringbuffer *rb,
}
static char setup_text_buf[CONSOLE_EXT_LOG_MAX] __initdata;
-static char setup_dict_buf[CONSOLE_EXT_LOG_MAX] __initdata;
void __init setup_log_buf(int early)
{
@@ -1165,7 +1172,7 @@ void __init setup_log_buf(int early)
prb_rec_init_rd(&r, &info,
&setup_text_buf[0], sizeof(setup_text_buf),
- &setup_dict_buf[0], sizeof(setup_dict_buf));
+ NULL, 0);
prb_init(&printk_rb_dynamic,
new_log_buf, ilog2(new_log_buf_len),
@@ -1903,7 +1910,9 @@ static inline u32 printk_caller_id(void)
0x80000000 + raw_smp_processor_id();
}
-static size_t log_output(int facility, int level, enum log_flags lflags, const char *dict, size_t dictlen, char *text, size_t text_len)
+static size_t log_output(int facility, int level, enum log_flags lflags,
+ const struct dev_printk_info *dev_info,
+ char *text, size_t text_len)
{
const u32 caller_id = printk_caller_id();
@@ -1927,12 +1936,12 @@ static size_t log_output(int facility, int level, enum log_flags lflags, const c
/* Store it in the record log */
return log_store(caller_id, facility, level, lflags, 0,
- dict, dictlen, text, text_len);
+ dev_info, text, text_len);
}
/* Must be called under logbuf_lock. */
int vprintk_store(int facility, int level,
- const char *dict, size_t dictlen,
+ const struct dev_printk_info *dev_info,
const char *fmt, va_list args)
{
static char textbuf[LOG_LINE_MAX];
@@ -1974,15 +1983,14 @@ int vprintk_store(int facility, int level,
if (level == LOGLEVEL_DEFAULT)
level = default_message_loglevel;
- if (dict)
+ if (dev_info)
lflags |= LOG_NEWLINE;
- return log_output(facility, level, lflags,
- dict, dictlen, text, text_len);
+ return log_output(facility, level, lflags, dev_info, text, text_len);
}
asmlinkage int vprintk_emit(int facility, int level,
- const char *dict, size_t dictlen,
+ const struct dev_printk_info *dev_info,
const char *fmt, va_list args)
{
int printed_len;
@@ -2003,7 +2011,7 @@ asmlinkage int vprintk_emit(int facility, int level,
/* This stops the holder of console_sem just where we want him */
logbuf_lock_irqsave(flags);
- printed_len = vprintk_store(facility, level, dict, dictlen, fmt, args);
+ printed_len = vprintk_store(facility, level, dev_info, fmt, args);
logbuf_unlock_irqrestore(flags);
/* If called from the scheduler, we can not call up(). */
@@ -2037,7 +2045,7 @@ EXPORT_SYMBOL(vprintk);
int vprintk_default(const char *fmt, va_list args)
{
- return vprintk_emit(0, LOGLEVEL_DEFAULT, NULL, 0, fmt, args);
+ return vprintk_emit(0, LOGLEVEL_DEFAULT, NULL, fmt, args);
}
EXPORT_SYMBOL_GPL(vprintk_default);
@@ -2100,8 +2108,8 @@ static ssize_t info_print_ext_header(char *buf, size_t size,
return 0;
}
static ssize_t msg_print_ext_body(char *buf, size_t size,
- char *dict, size_t dict_len,
- char *text, size_t text_len) { return 0; }
+ char *text, size_t text_len,
+ struct dev_printk_info *dev_info) { return 0; }
static void console_lock_spinning_enable(void) { }
static int console_lock_spinning_disable_and_check(void) { return 0; }
static void call_console_drivers(const char *ext_text, size_t ext_len,
@@ -2390,7 +2398,6 @@ void console_unlock(void)
{
static char ext_text[CONSOLE_EXT_LOG_MAX];
static char text[LOG_LINE_MAX + PREFIX_MAX];
- static char dict[LOG_LINE_MAX];
unsigned long flags;
bool do_cond_resched, retry;
struct printk_info info;
@@ -2401,7 +2408,7 @@ void console_unlock(void)
return;
}
- prb_rec_init_rd(&r, &info, text, sizeof(text), dict, sizeof(dict));
+ prb_rec_init_rd(&r, &info, text, sizeof(text), NULL, 0);
/*
* Console drivers are called with interrupts disabled, so
@@ -2473,10 +2480,9 @@ skip:
r.info);
ext_len += msg_print_ext_body(ext_text + ext_len,
sizeof(ext_text) - ext_len,
- &r.dict_buf[0],
- r.info->dict_len,
&r.text_buf[0],
- r.info->text_len);
+ r.info->text_len,
+ &r.info->dev_info);
}
len = record_print_text(&r,
console_msg_format & MSG_FORMAT_SYSLOG,
@@ -3055,7 +3061,7 @@ int vprintk_deferred(const char *fmt, va_list args)
{
int r;
- r = vprintk_emit(0, LOGLEVEL_SCHED, NULL, 0, fmt, args);
+ r = vprintk_emit(0, LOGLEVEL_SCHED, NULL, fmt, args);
defer_console_output();
return r;
diff --git a/kernel/printk/printk_ringbuffer.h b/kernel/printk/printk_ringbuffer.h
index 97c8561e74e0..480499ce3c6b 100644
--- a/kernel/printk/printk_ringbuffer.h
+++ b/kernel/printk/printk_ringbuffer.h
@@ -4,6 +4,7 @@
#define _KERNEL_PRINTK_RINGBUFFER_H
#include <linux/atomic.h>
+#include <linux/dev_printk.h>
/*
* Meta information about each stored message.
@@ -21,6 +22,8 @@ struct printk_info {
u8 flags:5; /* internal record flags */
u8 level:3; /* syslog level */
u32 caller_id; /* thread id or processor id */
+
+ struct dev_printk_info dev_info;
};
/*
diff --git a/kernel/printk/printk_safe.c b/kernel/printk/printk_safe.c
index 50aeae770434..5dbc40160990 100644
--- a/kernel/printk/printk_safe.c
+++ b/kernel/printk/printk_safe.c
@@ -375,7 +375,7 @@ __printf(1, 0) int vprintk_func(const char *fmt, va_list args)
raw_spin_trylock(&logbuf_lock)) {
int len;
- len = vprintk_store(0, LOGLEVEL_DEFAULT, NULL, 0, fmt, args);
+ len = vprintk_store(0, LOGLEVEL_DEFAULT, NULL, fmt, args);
raw_spin_unlock(&logbuf_lock);
defer_console_output();
return len;
diff --git a/scripts/gdb/linux/dmesg.py b/scripts/gdb/linux/dmesg.py
index bce14de5f610..a92c55bd8de5 100644
--- a/scripts/gdb/linux/dmesg.py
+++ b/scripts/gdb/linux/dmesg.py
@@ -52,6 +52,12 @@ class LxDmesg(gdb.Command):
addr = utils.read_ulong(desc_ring, off)
descs = utils.read_memoryview(inf, addr, desc_sz * desc_ring_count).tobytes()
+ # read in info array
+ info_sz = printk_info_type.get_type().sizeof
+ off = prb_desc_ring_type.get_type()['infos'].bitpos // 8
+ addr = utils.read_ulong(desc_ring, off)
+ infos = utils.read_memoryview(inf, addr, info_sz * desc_ring_count).tobytes()
+
# read in text data ring structure
off = printk_ringbuffer_type.get_type()['text_data_ring'].bitpos // 8
addr = prb_addr + off
@@ -73,9 +79,8 @@ class LxDmesg(gdb.Command):
begin_off = off + (prb_data_blk_lpos_type.get_type()['begin'].bitpos // 8)
next_off = off + (prb_data_blk_lpos_type.get_type()['next'].bitpos // 8)
- off = prb_desc_type.get_type()['info'].bitpos // 8
- ts_off = off + printk_info_type.get_type()['ts_nsec'].bitpos // 8
- len_off = off + printk_info_type.get_type()['text_len'].bitpos // 8
+ ts_off = printk_info_type.get_type()['ts_nsec'].bitpos // 8
+ len_off = printk_info_type.get_type()['text_len'].bitpos // 8
# definitions from kernel/printk/printk_ringbuffer.h
desc_committed = 1
@@ -95,6 +100,7 @@ class LxDmesg(gdb.Command):
while True:
ind = did % desc_ring_count
desc_off = desc_sz * ind
+ info_off = info_sz * ind
# skip non-committed record
state = 3 & (utils.read_u64(descs, desc_off + sv_off +
@@ -119,7 +125,7 @@ class LxDmesg(gdb.Command):
# skip over descriptor id
text_start = begin + utils.get_long_type().sizeof
- text_len = utils.read_u16(descs, desc_off + len_off)
+ text_len = utils.read_u16(infos, info_off + len_off)
# handle truncated message
if end - text_start < text_len:
@@ -128,7 +134,7 @@ class LxDmesg(gdb.Command):
text = text_data[text_start:text_start + text_len].decode(
encoding='utf8', errors='replace')
- time_stamp = utils.read_u64(descs, desc_off + ts_off)
+ time_stamp = utils.read_u64(infos, info_off + ts_off)
for line in text.splitlines():
msg = u"[{time:12.6f}] {line}\n".format(
generated by cgit (git 2.34.1) at 2024-06-01 11:32:30 +0000