diff options
| -rw-r--r-- | include/linux/seq_buf.h | 17 | ||||
| -rw-r--r-- | kernel/trace/ftrace.c | 2 | ||||
| -rw-r--r-- | kernel/trace/trace.c | 5 | ||||
| -rw-r--r-- | kernel/trace/trace_events_synth.c | 3 | ||||
| -rw-r--r-- | lib/seq_buf.c | 49 |
5 files changed, 47 insertions, 29 deletions
diff --git a/include/linux/seq_buf.h b/include/linux/seq_buf.h index c44f4b47b945..fe41da005970 100644 --- a/include/linux/seq_buf.h +++ b/include/linux/seq_buf.h @@ -2,7 +2,10 @@ #ifndef _LINUX_SEQ_BUF_H #define _LINUX_SEQ_BUF_H -#include <linux/fs.h> +#include <linux/bug.h> +#include <linux/minmax.h> +#include <linux/seq_file.h> +#include <linux/types.h> /* * Trace sequences are used to allow a function to call several other functions @@ -10,7 +13,7 @@ */ /** - * seq_buf - seq buffer structure + * struct seq_buf - seq buffer structure * @buffer: pointer to the buffer * @size: size of the buffer * @len: the amount of data inside the buffer @@ -77,10 +80,10 @@ static inline unsigned int seq_buf_used(struct seq_buf *s) } /** - * seq_buf_str - get %NUL-terminated C string from seq_buf + * seq_buf_str - get NUL-terminated C string from seq_buf * @s: the seq_buf handle * - * This makes sure that the buffer in @s is nul terminated and + * This makes sure that the buffer in @s is NUL-terminated and * safe to read as a string. * * Note, if this is called when the buffer has overflowed, then @@ -90,7 +93,7 @@ static inline unsigned int seq_buf_used(struct seq_buf *s) * After this function is called, s->buffer is safe to use * in string operations. * - * Returns @s->buf after making sure it is terminated. + * Returns: @s->buf after making sure it is terminated. */ static inline const char *seq_buf_str(struct seq_buf *s) { @@ -110,7 +113,7 @@ static inline const char *seq_buf_str(struct seq_buf *s) * @s: the seq_buf handle * @bufp: the beginning of the buffer is stored here * - * Return the number of bytes available in the buffer, or zero if + * Returns: the number of bytes available in the buffer, or zero if * there's no space. */ static inline size_t seq_buf_get_buf(struct seq_buf *s, char **bufp) @@ -132,7 +135,7 @@ static inline size_t seq_buf_get_buf(struct seq_buf *s, char **bufp) * @num: the number of bytes to commit * * Commit @num bytes of data written to a buffer previously acquired - * by seq_buf_get. To signal an error condition, or that the data + * by seq_buf_get_buf(). To signal an error condition, or that the data * didn't fit in the available space, pass a negative @num value. */ static inline void seq_buf_commit(struct seq_buf *s, int num) diff --git a/kernel/trace/ftrace.c b/kernel/trace/ftrace.c index c060d5b47910..83ba342aef31 100644 --- a/kernel/trace/ftrace.c +++ b/kernel/trace/ftrace.c @@ -5331,7 +5331,7 @@ static int register_ftrace_function_nolock(struct ftrace_ops *ops); * not support ftrace_regs_caller but direct_call, use SAVE_ARGS so that it * jumps from ftrace_caller for multiple ftrace_ops. */ -#ifndef HAVE_DYNAMIC_FTRACE_WITH_REGS +#ifndef CONFIG_HAVE_DYNAMIC_FTRACE_WITH_REGS #define MULTI_FLAGS (FTRACE_OPS_FL_DIRECT | FTRACE_OPS_FL_SAVE_ARGS) #else #define MULTI_FLAGS (FTRACE_OPS_FL_DIRECT | FTRACE_OPS_FL_SAVE_REGS) diff --git a/kernel/trace/trace.c b/kernel/trace/trace.c index 9ff8a439d674..8198bfc54b58 100644 --- a/kernel/trace/trace.c +++ b/kernel/trace/trace.c @@ -39,6 +39,7 @@ #include <linux/ctype.h> #include <linux/init.h> #include <linux/panic_notifier.h> +#include <linux/kmemleak.h> #include <linux/poll.h> #include <linux/nmi.h> #include <linux/fs.h> @@ -1532,7 +1533,7 @@ void disable_trace_on_warning(void) bool tracer_tracing_is_on(struct trace_array *tr) { if (tr->array_buffer.buffer) - return ring_buffer_record_is_on(tr->array_buffer.buffer); + return ring_buffer_record_is_set_on(tr->array_buffer.buffer); return !tr->buffer_disabled; } @@ -2339,6 +2340,7 @@ static void free_saved_cmdlines_buffer(struct saved_cmdlines_buffer *s) int order = get_order(sizeof(*s) + s->cmdline_num * TASK_COMM_LEN); kfree(s->map_cmdline_to_pid); + kmemleak_free(s); free_pages((unsigned long)s, order); } @@ -2358,6 +2360,7 @@ static struct saved_cmdlines_buffer *allocate_cmdlines_buffer(unsigned int val) return NULL; s = page_address(page); + kmemleak_alloc(s, size, 1, GFP_KERNEL); memset(s, 0, sizeof(*s)); /* Round up to actual allocation */ diff --git a/kernel/trace/trace_events_synth.c b/kernel/trace/trace_events_synth.c index e7af286af4f1..c82b401a294d 100644 --- a/kernel/trace/trace_events_synth.c +++ b/kernel/trace/trace_events_synth.c @@ -441,8 +441,9 @@ static unsigned int trace_string(struct synth_trace_event *entry, if (is_dynamic) { union trace_synth_field *data = &entry->fields[*n_u64]; + len = fetch_store_strlen((unsigned long)str_val); data->as_dynamic.offset = struct_size(entry, fields, event->n_u64) + data_size; - data->as_dynamic.len = fetch_store_strlen((unsigned long)str_val); + data->as_dynamic.len = len; ret = fetch_store_string((unsigned long)str_val, &entry->fields[*n_u64], entry); diff --git a/lib/seq_buf.c b/lib/seq_buf.c index 010c730ca7fc..f3f3436d60a9 100644 --- a/lib/seq_buf.c +++ b/lib/seq_buf.c @@ -13,16 +13,26 @@ * seq_buf_init() more than once to reset the seq_buf to start * from scratch. */ -#include <linux/uaccess.h> -#include <linux/seq_file.h> + +#include <linux/bug.h> +#include <linux/err.h> +#include <linux/export.h> +#include <linux/hex.h> +#include <linux/minmax.h> +#include <linux/printk.h> #include <linux/seq_buf.h> +#include <linux/seq_file.h> +#include <linux/sprintf.h> +#include <linux/string.h> +#include <linux/types.h> +#include <linux/uaccess.h> /** * seq_buf_can_fit - can the new data fit in the current buffer? * @s: the seq_buf descriptor * @len: The length to see if it can fit in the current buffer * - * Returns true if there's enough unused space in the seq_buf buffer + * Returns: true if there's enough unused space in the seq_buf buffer * to fit the amount of new data according to @len. */ static bool seq_buf_can_fit(struct seq_buf *s, size_t len) @@ -35,7 +45,7 @@ static bool seq_buf_can_fit(struct seq_buf *s, size_t len) * @m: the seq_file descriptor that is the destination * @s: the seq_buf descriptor that is the source. * - * Returns zero on success, non zero otherwise + * Returns: zero on success, non-zero otherwise. */ int seq_buf_print_seq(struct seq_file *m, struct seq_buf *s) { @@ -50,9 +60,9 @@ int seq_buf_print_seq(struct seq_file *m, struct seq_buf *s) * @fmt: printf format string * @args: va_list of arguments from a printf() type function * - * Writes a vnprintf() format into the sequencce buffer. + * Writes a vnprintf() format into the sequence buffer. * - * Returns zero on success, -1 on overflow. + * Returns: zero on success, -1 on overflow. */ int seq_buf_vprintf(struct seq_buf *s, const char *fmt, va_list args) { @@ -78,7 +88,7 @@ int seq_buf_vprintf(struct seq_buf *s, const char *fmt, va_list args) * * Writes a printf() format into the sequence buffer. * - * Returns zero on success, -1 on overflow. + * Returns: zero on success, -1 on overflow. */ int seq_buf_printf(struct seq_buf *s, const char *fmt, ...) { @@ -94,12 +104,12 @@ int seq_buf_printf(struct seq_buf *s, const char *fmt, ...) EXPORT_SYMBOL_GPL(seq_buf_printf); /** - * seq_buf_do_printk - printk seq_buf line by line + * seq_buf_do_printk - printk() seq_buf line by line * @s: seq_buf descriptor * @lvl: printk level * * printk()-s a multi-line sequential buffer line by line. The function - * makes sure that the buffer in @s is nul terminated and safe to read + * makes sure that the buffer in @s is NUL-terminated and safe to read * as a string. */ void seq_buf_do_printk(struct seq_buf *s, const char *lvl) @@ -139,7 +149,7 @@ EXPORT_SYMBOL_GPL(seq_buf_do_printk); * This function will take the format and the binary array and finish * the conversion into the ASCII string within the buffer. * - * Returns zero on success, -1 on overflow. + * Returns: zero on success, -1 on overflow. */ int seq_buf_bprintf(struct seq_buf *s, const char *fmt, const u32 *binary) { @@ -167,7 +177,7 @@ int seq_buf_bprintf(struct seq_buf *s, const char *fmt, const u32 *binary) * * Copy a simple string into the sequence buffer. * - * Returns zero on success, -1 on overflow + * Returns: zero on success, -1 on overflow. */ int seq_buf_puts(struct seq_buf *s, const char *str) { @@ -196,7 +206,7 @@ EXPORT_SYMBOL_GPL(seq_buf_puts); * * Copy a single character into the sequence buffer. * - * Returns zero on success, -1 on overflow + * Returns: zero on success, -1 on overflow. */ int seq_buf_putc(struct seq_buf *s, unsigned char c) { @@ -212,7 +222,7 @@ int seq_buf_putc(struct seq_buf *s, unsigned char c) EXPORT_SYMBOL_GPL(seq_buf_putc); /** - * seq_buf_putmem - write raw data into the sequenc buffer + * seq_buf_putmem - write raw data into the sequence buffer * @s: seq_buf descriptor * @mem: The raw memory to copy into the buffer * @len: The length of the raw memory to copy (in bytes) @@ -221,7 +231,7 @@ EXPORT_SYMBOL_GPL(seq_buf_putc); * buffer and a strcpy() would not work. Using this function allows * for such cases. * - * Returns zero on success, -1 on overflow + * Returns: zero on success, -1 on overflow. */ int seq_buf_putmem(struct seq_buf *s, const void *mem, unsigned int len) { @@ -249,7 +259,7 @@ int seq_buf_putmem(struct seq_buf *s, const void *mem, unsigned int len) * raw memory into the buffer it writes its ASCII representation of it * in hex characters. * - * Returns zero on success, -1 on overflow + * Returns: zero on success, -1 on overflow. */ int seq_buf_putmem_hex(struct seq_buf *s, const void *mem, unsigned int len) @@ -297,7 +307,7 @@ int seq_buf_putmem_hex(struct seq_buf *s, const void *mem, * * Write a path name into the sequence buffer. * - * Returns the number of written bytes on success, -1 on overflow + * Returns: the number of written bytes on success, -1 on overflow. */ int seq_buf_path(struct seq_buf *s, const struct path *path, const char *esc) { @@ -332,6 +342,7 @@ int seq_buf_path(struct seq_buf *s, const struct path *path, const char *esc) * or until it reaches the end of the content in the buffer (@s->len), * whichever comes first. * + * Returns: * On success, it returns a positive number of the number of bytes * it copied. * @@ -382,11 +393,11 @@ int seq_buf_to_user(struct seq_buf *s, char __user *ubuf, size_t start, int cnt) * linebuf size is maximal length for one line. * 32 * 3 - maximum bytes per line, each printed into 2 chars + 1 for * separating space - * 2 - spaces separating hex dump and ascii representation - * 32 - ascii representation + * 2 - spaces separating hex dump and ASCII representation + * 32 - ASCII representation * 1 - terminating '\0' * - * Returns zero on success, -1 on overflow + * Returns: zero on success, -1 on overflow. */ int seq_buf_hex_dump(struct seq_buf *s, const char *prefix_str, int prefix_type, int rowsize, int groupsize, |