diff options
| -rw-r--r-- | include/linux/trace_seq.h | 37 | ||||
| -rw-r--r-- | kernel/trace/trace_seq.c | 84 |
2 files changed, 38 insertions, 83 deletions
diff --git a/include/linux/trace_seq.h b/include/linux/trace_seq.h index 07eda413dfcf..db8a73224f1a 100644 --- a/include/linux/trace_seq.h +++ b/include/linux/trace_seq.h @@ -57,40 +57,37 @@ static inline bool trace_seq_has_overflowed(struct trace_seq *s) */ #ifdef CONFIG_TRACING extern __printf(2, 3) -int trace_seq_printf(struct trace_seq *s, const char *fmt, ...); +void trace_seq_printf(struct trace_seq *s, const char *fmt, ...); extern __printf(2, 0) -int trace_seq_vprintf(struct trace_seq *s, const char *fmt, va_list args); -extern int +void trace_seq_vprintf(struct trace_seq *s, const char *fmt, va_list args); +extern void trace_seq_bprintf(struct trace_seq *s, const char *fmt, const u32 *binary); extern int trace_print_seq(struct seq_file *m, struct trace_seq *s); extern int trace_seq_to_user(struct trace_seq *s, char __user *ubuf, int cnt); -extern int trace_seq_puts(struct trace_seq *s, const char *str); -extern int trace_seq_putc(struct trace_seq *s, unsigned char c); -extern int trace_seq_putmem(struct trace_seq *s, const void *mem, unsigned int len); -extern int trace_seq_putmem_hex(struct trace_seq *s, const void *mem, +extern void trace_seq_puts(struct trace_seq *s, const char *str); +extern void trace_seq_putc(struct trace_seq *s, unsigned char c); +extern void trace_seq_putmem(struct trace_seq *s, const void *mem, unsigned int len); +extern void trace_seq_putmem_hex(struct trace_seq *s, const void *mem, unsigned int len); extern int trace_seq_path(struct trace_seq *s, const struct path *path); -extern int trace_seq_bitmask(struct trace_seq *s, const unsigned long *maskp, +extern void trace_seq_bitmask(struct trace_seq *s, const unsigned long *maskp, int nmaskbits); #else /* CONFIG_TRACING */ -static inline int trace_seq_printf(struct trace_seq *s, const char *fmt, ...) +static inline void trace_seq_printf(struct trace_seq *s, const char *fmt, ...) { - return 0; } -static inline int +static inline void trace_seq_bprintf(struct trace_seq *s, const char *fmt, const u32 *binary) { - return 0; } -static inline int +static inline void trace_seq_bitmask(struct trace_seq *s, const unsigned long *maskp, int nmaskbits) { - return 0; } static inline int trace_print_seq(struct seq_file *m, struct trace_seq *s) @@ -102,23 +99,19 @@ static inline int trace_seq_to_user(struct trace_seq *s, char __user *ubuf, { return 0; } -static inline int trace_seq_puts(struct trace_seq *s, const char *str) +static inline void trace_seq_puts(struct trace_seq *s, const char *str) { - return 0; } -static inline int trace_seq_putc(struct trace_seq *s, unsigned char c) +static inline void trace_seq_putc(struct trace_seq *s, unsigned char c) { - return 0; } -static inline int +static inline void trace_seq_putmem(struct trace_seq *s, const void *mem, unsigned int len) { - return 0; } -static inline int trace_seq_putmem_hex(struct trace_seq *s, const void *mem, +static inline void trace_seq_putmem_hex(struct trace_seq *s, const void *mem, unsigned int len) { - return 0; } static inline int trace_seq_path(struct trace_seq *s, const struct path *path) { diff --git a/kernel/trace/trace_seq.c b/kernel/trace/trace_seq.c index b100994a17fe..fabfa0f190a3 100644 --- a/kernel/trace/trace_seq.c +++ b/kernel/trace/trace_seq.c @@ -69,20 +69,15 @@ int trace_print_seq(struct seq_file *m, struct trace_seq *s) * trace_seq_printf() is used to store strings into a special * buffer (@s). Then the output may be either used by * the sequencer or pulled into another buffer. - * - * Returns 1 if we successfully written all the contents to - * the buffer. - * Returns 0 if we the length to write is bigger than the - * reserved buffer space. In this case, nothing gets written. */ -int trace_seq_printf(struct trace_seq *s, const char *fmt, ...) +void trace_seq_printf(struct trace_seq *s, const char *fmt, ...) { unsigned int len = TRACE_SEQ_BUF_LEFT(s); va_list ap; int ret; if (s->full || !len) - return 0; + return; va_start(ap, fmt); ret = vsnprintf(s->buffer + s->len, len, fmt, ap); @@ -91,12 +86,10 @@ int trace_seq_printf(struct trace_seq *s, const char *fmt, ...) /* If we can't write it all, don't bother writing anything */ if (ret >= len) { s->full = 1; - return 0; + return; } s->len += ret; - - return 1; } EXPORT_SYMBOL_GPL(trace_seq_printf); @@ -107,25 +100,18 @@ EXPORT_SYMBOL_GPL(trace_seq_printf); * @nmaskbits: The number of bits that are valid in @maskp * * Writes a ASCII representation of a bitmask string into @s. - * - * Returns 1 if we successfully written all the contents to - * the buffer. - * Returns 0 if we the length to write is bigger than the - * reserved buffer space. In this case, nothing gets written. */ -int trace_seq_bitmask(struct trace_seq *s, const unsigned long *maskp, +void trace_seq_bitmask(struct trace_seq *s, const unsigned long *maskp, int nmaskbits) { unsigned int len = TRACE_SEQ_BUF_LEFT(s); int ret; if (s->full || !len) - return 0; + return; ret = bitmap_scnprintf(s->buffer + s->len, len, maskp, nmaskbits); s->len += ret; - - return 1; } EXPORT_SYMBOL_GPL(trace_seq_bitmask); @@ -139,28 +125,24 @@ EXPORT_SYMBOL_GPL(trace_seq_bitmask); * trace_seq_printf is used to store strings into a special * buffer (@s). Then the output may be either used by * the sequencer or pulled into another buffer. - * - * Returns how much it wrote to the buffer. */ -int trace_seq_vprintf(struct trace_seq *s, const char *fmt, va_list args) +void trace_seq_vprintf(struct trace_seq *s, const char *fmt, va_list args) { unsigned int len = TRACE_SEQ_BUF_LEFT(s); int ret; if (s->full || !len) - return 0; + return; ret = vsnprintf(s->buffer + s->len, len, fmt, args); /* If we can't write it all, don't bother writing anything */ if (ret >= len) { s->full = 1; - return 0; + return; } s->len += ret; - - return len; } EXPORT_SYMBOL_GPL(trace_seq_vprintf); @@ -178,28 +160,24 @@ EXPORT_SYMBOL_GPL(trace_seq_vprintf); * * This function will take the format and the binary array and finish * the conversion into the ASCII string within the buffer. - * - * Returns how much it wrote to the buffer. */ -int trace_seq_bprintf(struct trace_seq *s, const char *fmt, const u32 *binary) +void trace_seq_bprintf(struct trace_seq *s, const char *fmt, const u32 *binary) { unsigned int len = TRACE_SEQ_BUF_LEFT(s); int ret; if (s->full || !len) - return 0; + return; ret = bstr_printf(s->buffer + s->len, len, fmt, binary); /* If we can't write it all, don't bother writing anything */ if (ret >= len) { s->full = 1; - return 0; + return; } s->len += ret; - - return len; } EXPORT_SYMBOL_GPL(trace_seq_bprintf); @@ -212,25 +190,21 @@ EXPORT_SYMBOL_GPL(trace_seq_bprintf); * copy to user routines. This function records a simple string * into a special buffer (@s) for later retrieval by a sequencer * or other mechanism. - * - * Returns how much it wrote to the buffer. */ -int trace_seq_puts(struct trace_seq *s, const char *str) +void trace_seq_puts(struct trace_seq *s, const char *str) { unsigned int len = strlen(str); if (s->full) - return 0; + return; if (len > TRACE_SEQ_BUF_LEFT(s)) { s->full = 1; - return 0; + return; } memcpy(s->buffer + s->len, str, len); s->len += len; - - return len; } EXPORT_SYMBOL_GPL(trace_seq_puts); @@ -243,22 +217,18 @@ EXPORT_SYMBOL_GPL(trace_seq_puts); * copy to user routines. This function records a simple charater * into a special buffer (@s) for later retrieval by a sequencer * or other mechanism. - * - * Returns how much it wrote to the buffer. */ -int trace_seq_putc(struct trace_seq *s, unsigned char c) +void trace_seq_putc(struct trace_seq *s, unsigned char c) { if (s->full) - return 0; + return; if (TRACE_SEQ_BUF_LEFT(s) < 1) { s->full = 1; - return 0; + return; } s->buffer[s->len++] = c; - - return 1; } EXPORT_SYMBOL_GPL(trace_seq_putc); @@ -271,23 +241,19 @@ EXPORT_SYMBOL_GPL(trace_seq_putc); * There may be cases where raw memory needs to be written into the * buffer and a strcpy() would not work. Using this function allows * for such cases. - * - * Returns how much it wrote to the buffer. */ -int trace_seq_putmem(struct trace_seq *s, const void *mem, unsigned int len) +void trace_seq_putmem(struct trace_seq *s, const void *mem, unsigned int len) { if (s->full) - return 0; + return; if (len > TRACE_SEQ_BUF_LEFT(s)) { s->full = 1; - return 0; + return; } memcpy(s->buffer + s->len, mem, len); s->len += len; - - return len; } EXPORT_SYMBOL_GPL(trace_seq_putmem); @@ -303,20 +269,17 @@ EXPORT_SYMBOL_GPL(trace_seq_putmem); * This is similar to trace_seq_putmem() except instead of just copying the * raw memory into the buffer it writes its ASCII representation of it * in hex characters. - * - * Returns how much it wrote to the buffer. */ -int trace_seq_putmem_hex(struct trace_seq *s, const void *mem, +void trace_seq_putmem_hex(struct trace_seq *s, const void *mem, unsigned int len) { unsigned char hex[HEX_CHARS]; const unsigned char *data = mem; unsigned int start_len; int i, j; - int cnt = 0; if (s->full) - return 0; + return; while (len) { start_len = min(len, HEX_CHARS - 1); @@ -335,9 +298,8 @@ int trace_seq_putmem_hex(struct trace_seq *s, const void *mem, len -= j / 2; hex[j++] = ' '; - cnt += trace_seq_putmem(s, hex, j); + trace_seq_putmem(s, hex, j); } - return cnt; } EXPORT_SYMBOL_GPL(trace_seq_putmem_hex); |