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author | Russell King <rmk+kernel@arm.linux.org.uk> | 2009-09-22 19:54:53 (GMT) |
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committer | Russell King <rmk+kernel@arm.linux.org.uk> | 2009-09-22 20:01:40 (GMT) |
commit | ae19ffbadc1b2100285a5b5b3d0a4e0a11390904 (patch) | |
tree | 3c2086ab67398a019089a47ca3f362a4bc6db74f /kernel/trace/ftrace.c | |
parent | 34e84f39a27d059a3e6ec6e8b94aafa702e6f220 (diff) | |
parent | 9173a8ef24a6b1b8031507b35b8ffe5f85a87692 (diff) | |
download | linux-fsl-qoriq-ae19ffbadc1b2100285a5b5b3d0a4e0a11390904.tar.xz |
Merge branch 'master' into for-linus
Diffstat (limited to 'kernel/trace/ftrace.c')
-rw-r--r-- | kernel/trace/ftrace.c | 158 |
1 files changed, 44 insertions, 114 deletions
diff --git a/kernel/trace/ftrace.c b/kernel/trace/ftrace.c index 8c804e2..cc615f8 100644 --- a/kernel/trace/ftrace.c +++ b/kernel/trace/ftrace.c @@ -1323,11 +1323,10 @@ static int __init ftrace_dyn_table_alloc(unsigned long num_to_init) enum { FTRACE_ITER_FILTER = (1 << 0), - FTRACE_ITER_CONT = (1 << 1), - FTRACE_ITER_NOTRACE = (1 << 2), - FTRACE_ITER_FAILURES = (1 << 3), - FTRACE_ITER_PRINTALL = (1 << 4), - FTRACE_ITER_HASH = (1 << 5), + FTRACE_ITER_NOTRACE = (1 << 1), + FTRACE_ITER_FAILURES = (1 << 2), + FTRACE_ITER_PRINTALL = (1 << 3), + FTRACE_ITER_HASH = (1 << 4), }; #define FTRACE_BUFF_MAX (KSYM_SYMBOL_LEN+4) /* room for wildcards */ @@ -1337,8 +1336,7 @@ struct ftrace_iterator { int hidx; int idx; unsigned flags; - unsigned char buffer[FTRACE_BUFF_MAX+1]; - unsigned buffer_idx; + struct trace_parser parser; }; static void * @@ -1407,7 +1405,7 @@ static int t_hash_show(struct seq_file *m, void *v) if (rec->ops->print) return rec->ops->print(m, rec->ip, rec->ops, rec->data); - seq_printf(m, "%pf:%pf", (void *)rec->ip, (void *)rec->ops->func); + seq_printf(m, "%ps:%ps", (void *)rec->ip, (void *)rec->ops->func); if (rec->data) seq_printf(m, ":%p", rec->data); @@ -1517,7 +1515,7 @@ static int t_show(struct seq_file *m, void *v) if (!rec) return 0; - seq_printf(m, "%pf\n", (void *)rec->ip); + seq_printf(m, "%ps\n", (void *)rec->ip); return 0; } @@ -1604,6 +1602,11 @@ ftrace_regex_open(struct inode *inode, struct file *file, int enable) if (!iter) return -ENOMEM; + if (trace_parser_get_init(&iter->parser, FTRACE_BUFF_MAX)) { + kfree(iter); + return -ENOMEM; + } + mutex_lock(&ftrace_regex_lock); if ((file->f_mode & FMODE_WRITE) && (file->f_flags & O_TRUNC)) @@ -2059,9 +2062,9 @@ __unregister_ftrace_function_probe(char *glob, struct ftrace_probe_ops *ops, int i, len = 0; char *search; - if (glob && (strcmp(glob, "*") || !strlen(glob))) + if (glob && (strcmp(glob, "*") == 0 || !strlen(glob))) glob = NULL; - else { + else if (glob) { int not; type = ftrace_setup_glob(glob, strlen(glob), &search, ¬); @@ -2196,9 +2199,8 @@ ftrace_regex_write(struct file *file, const char __user *ubuf, size_t cnt, loff_t *ppos, int enable) { struct ftrace_iterator *iter; - char ch; - size_t read = 0; - ssize_t ret; + struct trace_parser *parser; + ssize_t ret, read; if (!cnt || cnt < 0) return 0; @@ -2211,72 +2213,23 @@ ftrace_regex_write(struct file *file, const char __user *ubuf, } else iter = file->private_data; - if (!*ppos) { - iter->flags &= ~FTRACE_ITER_CONT; - iter->buffer_idx = 0; - } - - ret = get_user(ch, ubuf++); - if (ret) - goto out; - read++; - cnt--; + parser = &iter->parser; + read = trace_get_user(parser, ubuf, cnt, ppos); - /* - * If the parser haven't finished with the last write, - * continue reading the user input without skipping spaces. - */ - if (!(iter->flags & FTRACE_ITER_CONT)) { - /* skip white space */ - while (cnt && isspace(ch)) { - ret = get_user(ch, ubuf++); - if (ret) - goto out; - read++; - cnt--; - } - - /* only spaces were written */ - if (isspace(ch)) { - *ppos += read; - ret = read; - goto out; - } - - iter->buffer_idx = 0; - } - - while (cnt && !isspace(ch)) { - if (iter->buffer_idx < FTRACE_BUFF_MAX) - iter->buffer[iter->buffer_idx++] = ch; - else { - ret = -EINVAL; - goto out; - } - ret = get_user(ch, ubuf++); + if (trace_parser_loaded(parser) && + !trace_parser_cont(parser)) { + ret = ftrace_process_regex(parser->buffer, + parser->idx, enable); if (ret) goto out; - read++; - cnt--; - } - if (isspace(ch)) { - iter->buffer[iter->buffer_idx] = 0; - ret = ftrace_process_regex(iter->buffer, - iter->buffer_idx, enable); - if (ret) - goto out; - iter->buffer_idx = 0; - } else { - iter->flags |= FTRACE_ITER_CONT; - iter->buffer[iter->buffer_idx++] = ch; + trace_parser_clear(parser); } - *ppos += read; ret = read; - out: - mutex_unlock(&ftrace_regex_lock); + mutex_unlock(&ftrace_regex_lock); +out: return ret; } @@ -2381,6 +2334,7 @@ ftrace_regex_release(struct inode *inode, struct file *file, int enable) { struct seq_file *m = (struct seq_file *)file->private_data; struct ftrace_iterator *iter; + struct trace_parser *parser; mutex_lock(&ftrace_regex_lock); if (file->f_mode & FMODE_READ) { @@ -2390,9 +2344,10 @@ ftrace_regex_release(struct inode *inode, struct file *file, int enable) } else iter = file->private_data; - if (iter->buffer_idx) { - iter->buffer[iter->buffer_idx] = 0; - ftrace_match_records(iter->buffer, iter->buffer_idx, enable); + parser = &iter->parser; + if (trace_parser_loaded(parser)) { + parser->buffer[parser->idx] = 0; + ftrace_match_records(parser->buffer, parser->idx, enable); } mutex_lock(&ftrace_lock); @@ -2400,7 +2355,9 @@ ftrace_regex_release(struct inode *inode, struct file *file, int enable) ftrace_run_update_code(FTRACE_ENABLE_CALLS); mutex_unlock(&ftrace_lock); + trace_parser_put(parser); kfree(iter); + mutex_unlock(&ftrace_regex_lock); return 0; } @@ -2499,7 +2456,7 @@ static int g_show(struct seq_file *m, void *v) return 0; } - seq_printf(m, "%pf\n", v); + seq_printf(m, "%ps\n", (void *)*ptr); return 0; } @@ -2602,12 +2559,10 @@ static ssize_t ftrace_graph_write(struct file *file, const char __user *ubuf, size_t cnt, loff_t *ppos) { - unsigned char buffer[FTRACE_BUFF_MAX+1]; + struct trace_parser parser; unsigned long *array; size_t read = 0; ssize_t ret; - int index = 0; - char ch; if (!cnt || cnt < 0) return 0; @@ -2625,51 +2580,26 @@ ftrace_graph_write(struct file *file, const char __user *ubuf, } else array = file->private_data; - ret = get_user(ch, ubuf++); - if (ret) + if (trace_parser_get_init(&parser, FTRACE_BUFF_MAX)) { + ret = -ENOMEM; goto out; - read++; - cnt--; - - /* skip white space */ - while (cnt && isspace(ch)) { - ret = get_user(ch, ubuf++); - if (ret) - goto out; - read++; - cnt--; } - if (isspace(ch)) { - *ppos += read; - ret = read; - goto out; - } + read = trace_get_user(&parser, ubuf, cnt, ppos); - while (cnt && !isspace(ch)) { - if (index < FTRACE_BUFF_MAX) - buffer[index++] = ch; - else { - ret = -EINVAL; - goto out; - } - ret = get_user(ch, ubuf++); + if (trace_parser_loaded((&parser))) { + parser.buffer[parser.idx] = 0; + + /* we allow only one expression at a time */ + ret = ftrace_set_func(array, &ftrace_graph_count, + parser.buffer); if (ret) goto out; - read++; - cnt--; } - buffer[index] = 0; - - /* we allow only one expression at a time */ - ret = ftrace_set_func(array, &ftrace_graph_count, buffer); - if (ret) - goto out; - - file->f_pos += read; ret = read; out: + trace_parser_put(&parser); mutex_unlock(&graph_lock); return ret; |