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Kernel
提交 62e32ac3 编写于 作者: J Joe Perches 提交者： Linus Torvalds
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printk: rename struct log to struct printk_log 

Rename the struct to enable moving portions of
printk.c to separate files.

The rename changes output of /proc/vmcoreinfo.
Signed-off-by: NJoe Perches <joe@perches.com>
Cc: Samuel Thibault <samuel.thibault@ens-lyon.org>
Cc: Ming Lei <ming.lei@canonical.com>
Signed-off-by: NAndrew Morton <akpm@linux-foundation.org>
Signed-off-by: NLinus Torvalds <torvalds@linux-foundation.org>
上级 23475408
隐藏空白更改
内联 并排
Showing with 40 addition and 40 deletion
kernel/printk/printk.c
浏览文件 @ 62e32ac3
......@@ -173,7 +173,7 @@ static int console_may_schedule;
* 67 "g"
* 0032 00 00 00 padding to next message header
*
* The 'struct log' buffer header must never be directly exported to
* The 'struct printk_log' buffer header must never be directly exported to
* userspace, it is a kernel-private implementation detail that might
* need to be changed in the future, when the requirements change.
*
......@@ -195,7 +195,7 @@ enum log_flags {
LOG_CONT = 8, /* text is a fragment of a continuation line */
};
struct log {
struct printk_log {
u64 ts_nsec; /* timestamp in nanoseconds */
u16 len; /* length of entire record */
u16 text_len; /* length of text buffer */
......@@ -243,7 +243,7 @@ static u32 clear_idx;
#if defined(CONFIG_HAVE_EFFICIENT_UNALIGNED_ACCESS)
#define LOG_ALIGN 4
#else
#define LOG_ALIGN __alignof__(struct log)
#define LOG_ALIGN __alignof__(struct printk_log)
#endif
#define __LOG_BUF_LEN (1 << CONFIG_LOG_BUF_SHIFT)
static char __log_buf[__LOG_BUF_LEN] __aligned(LOG_ALIGN);
......@@ -254,35 +254,35 @@ static u32 log_buf_len = __LOG_BUF_LEN;
static volatile unsigned int logbuf_cpu = UINT_MAX;
/* human readable text of the record */
static char *log_text(const struct log *msg)
static char *log_text(const struct printk_log *msg)
{
return (char *)msg + sizeof(struct log);
return (char *)msg + sizeof(struct printk_log);
}
/* optional key/value pair dictionary attached to the record */
static char *log_dict(const struct log *msg)
static char *log_dict(const struct printk_log *msg)
{
return (char *)msg + sizeof(struct log) + msg->text_len;
return (char *)msg + sizeof(struct printk_log) + msg->text_len;
}
/* get record by index; idx must point to valid msg */
static struct log *log_from_idx(u32 idx)
static struct printk_log *log_from_idx(u32 idx)
{
struct log *msg = (struct log *)(log_buf + idx);
struct printk_log *msg = (struct printk_log *)(log_buf + idx);
/*
* A length == 0 record is the end of buffer marker. Wrap around and
* read the message at the start of the buffer.
*/
if (!msg->len)
return (struct log *)log_buf;
return (struct printk_log *)log_buf;
return msg;
}
/* get next record; idx must point to valid msg */
static u32 log_next(u32 idx)
{
struct log *msg = (struct log *)(log_buf + idx);
struct printk_log *msg = (struct printk_log *)(log_buf + idx);
/* length == 0 indicates the end of the buffer; wrap */
/*
......@@ -291,7 +291,7 @@ static u32 log_next(u32 idx)
* return the one after that.
*/
if (!msg->len) {
msg = (struct log *)log_buf;
msg = (struct printk_log *)log_buf;
return msg->len;
}
return idx + msg->len;
......@@ -303,11 +303,11 @@ static void log_store(int facility, int level,
const char *dict, u16 dict_len,
const char *text, u16 text_len)
{
struct log *msg;
struct printk_log *msg;
u32 size, pad_len;
/* number of '\0' padding bytes to next message */
size = sizeof(struct log) + text_len + dict_len;
size = sizeof(struct printk_log) + text_len + dict_len;
pad_len = (-size) & (LOG_ALIGN - 1);
size += pad_len;
......@@ -319,7 +319,7 @@ static void log_store(int facility, int level,
else
free = log_first_idx - log_next_idx;
if (free > size + sizeof(struct log))
if (free > size + sizeof(struct printk_log))
break;
/* drop old messages until we have enough contiuous space */
......@@ -327,18 +327,18 @@ static void log_store(int facility, int level,
log_first_seq++;
}
if (log_next_idx + size + sizeof(struct log) >= log_buf_len) {
if (log_next_idx + size + sizeof(struct printk_log) >= log_buf_len) {
/*
* This message + an additional empty header does not fit
* at the end of the buffer. Add an empty header with len == 0
* to signify a wrap around.
*/
memset(log_buf + log_next_idx, 0, sizeof(struct log));
memset(log_buf + log_next_idx, 0, sizeof(struct printk_log));
log_next_idx = 0;
}
/* fill message */
msg = (struct log *)(log_buf + log_next_idx);
msg = (struct printk_log *)(log_buf + log_next_idx);
memcpy(log_text(msg), text, text_len);
msg->text_len = text_len;
memcpy(log_dict(msg), dict, dict_len);
......@@ -351,7 +351,7 @@ static void log_store(int facility, int level,
else
msg->ts_nsec = local_clock();
memset(log_dict(msg) + dict_len, 0, pad_len);
msg->len = sizeof(struct log) + text_len + dict_len + pad_len;
msg->len = sizeof(struct printk_log) + text_len + dict_len + pad_len;
/* insert message */
log_next_idx += msg->len;
......@@ -474,7 +474,7 @@ static ssize_t devkmsg_read(struct file *file, char __user *buf,
size_t count, loff_t *ppos)
{
struct devkmsg_user *user = file->private_data;
struct log *msg;
struct printk_log *msg;
u64 ts_usec;
size_t i;
char cont = '-';
......@@ -719,14 +719,14 @@ void log_buf_kexec_setup(void)
VMCOREINFO_SYMBOL(log_first_idx);
VMCOREINFO_SYMBOL(log_next_idx);
/*
* Export struct log size and field offsets. User space tools can
* Export struct printk_log size and field offsets. User space tools can
* parse it and detect any changes to structure down the line.
*/
VMCOREINFO_STRUCT_SIZE(log);
VMCOREINFO_OFFSET(log, ts_nsec);
VMCOREINFO_OFFSET(log, len);
VMCOREINFO_OFFSET(log, text_len);
VMCOREINFO_OFFSET(log, dict_len);
VMCOREINFO_STRUCT_SIZE(printk_log);
VMCOREINFO_OFFSET(printk_log, ts_nsec);
VMCOREINFO_OFFSET(printk_log, len);
VMCOREINFO_OFFSET(printk_log, text_len);
VMCOREINFO_OFFSET(printk_log, dict_len);
}
#endif
......@@ -879,7 +879,7 @@ static size_t print_time(u64 ts, char *buf)
(unsigned long)ts, rem_nsec / 1000);
}
static size_t print_prefix(const struct log *msg, bool syslog, char *buf)
static size_t print_prefix(const struct printk_log *msg, bool syslog, char *buf)
{
size_t len = 0;
unsigned int prefix = (msg->facility << 3) | msg->level;
......@@ -902,7 +902,7 @@ static size_t print_prefix(const struct log *msg, bool syslog, char *buf)
return len;
}
static size_t msg_print_text(const struct log *msg, enum log_flags prev,
static size_t msg_print_text(const struct printk_log *msg, enum log_flags prev,
bool syslog, char *buf, size_t size)
{
const char *text = log_text(msg);
......@@ -964,7 +964,7 @@ static size_t msg_print_text(const struct log *msg, enum log_flags prev,
static int syslog_print(char __user *buf, int size)
{
char *text;
struct log *msg;
struct printk_log *msg;
int len = 0;
text = kmalloc(LOG_LINE_MAX + PREFIX_MAX, GFP_KERNEL);
......@@ -1055,7 +1055,7 @@ static int syslog_print_all(char __user *buf, int size, bool clear)
idx = clear_idx;
prev = 0;
while (seq < log_next_seq) {
struct log *msg = log_from_idx(idx);
struct printk_log *msg = log_from_idx(idx);
len += msg_print_text(msg, prev, true, NULL, 0);
prev = msg->flags;
......@@ -1068,7 +1068,7 @@ static int syslog_print_all(char __user *buf, int size, bool clear)
idx = clear_idx;
prev = 0;
while (len > size && seq < log_next_seq) {
struct log *msg = log_from_idx(idx);
struct printk_log *msg = log_from_idx(idx);
len -= msg_print_text(msg, prev, true, NULL, 0);
prev = msg->flags;
......@@ -1082,7 +1082,7 @@ static int syslog_print_all(char __user *buf, int size, bool clear)
len = 0;
prev = 0;
while (len >= 0 && seq < next_seq) {
struct log *msg = log_from_idx(idx);
struct printk_log *msg = log_from_idx(idx);
int textlen;
textlen = msg_print_text(msg, prev, true, text,
......@@ -1228,7 +1228,7 @@ int do_syslog(int type, char __user *buf, int len, bool from_file)
error = 0;
while (seq < log_next_seq) {
struct log *msg = log_from_idx(idx);
struct printk_log *msg = log_from_idx(idx);
error += msg_print_text(msg, prev, true, NULL, 0);
idx = log_next(idx);
......@@ -1714,10 +1714,10 @@ static struct cont {
u8 level;
bool flushed:1;
} cont;
static struct log *log_from_idx(u32 idx) { return NULL; }
static struct printk_log *log_from_idx(u32 idx) { return NULL; }
static u32 log_next(u32 idx) { return 0; }
static void call_console_drivers(int level, const char *text, size_t len) {}
static size_t msg_print_text(const struct log *msg, enum log_flags prev,
static size_t msg_print_text(const struct printk_log *msg, enum log_flags prev,
bool syslog, char *buf, size_t size) { return 0; }
static size_t cont_print_text(char *text, size_t size) { return 0; }
......@@ -2029,7 +2029,7 @@ void console_unlock(void)
console_cont_flush(text, sizeof(text));
again:
for (;;) {
struct log *msg;
struct printk_log *msg;
size_t len;
int level;
......@@ -2645,7 +2645,7 @@ void kmsg_dump(enum kmsg_dump_reason reason)
bool kmsg_dump_get_line_nolock(struct kmsg_dumper *dumper, bool syslog,
char *line, size_t size, size_t *len)
{
struct log *msg;
struct printk_log *msg;
size_t l = 0;
bool ret = false;
......@@ -2757,7 +2757,7 @@ bool kmsg_dump_get_buffer(struct kmsg_dumper *dumper, bool syslog,
idx = dumper->cur_idx;
prev = 0;
while (seq < dumper->next_seq) {
struct log *msg = log_from_idx(idx);
struct printk_log *msg = log_from_idx(idx);
l += msg_print_text(msg, prev, true, NULL, 0);
idx = log_next(idx);
......@@ -2770,7 +2770,7 @@ bool kmsg_dump_get_buffer(struct kmsg_dumper *dumper, bool syslog,
idx = dumper->cur_idx;
prev = 0;
while (l > size && seq < dumper->next_seq) {
struct log *msg = log_from_idx(idx);
struct printk_log *msg = log_from_idx(idx);
l -= msg_print_text(msg, prev, true, NULL, 0);
idx = log_next(idx);
......@@ -2785,7 +2785,7 @@ bool kmsg_dump_get_buffer(struct kmsg_dumper *dumper, bool syslog,
l = 0;
prev = 0;
while (seq < dumper->next_seq) {
struct log *msg = log_from_idx(idx);
struct printk_log *msg = log_from_idx(idx);
l += msg_print_text(msg, prev, syslog, buf + l, size - l);
idx = log_next(idx);
......
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