diff options
Diffstat (limited to 'kernel/trace')
-rw-r--r-- | kernel/trace/Kconfig | 4 | ||||
-rw-r--r-- | kernel/trace/blktrace.c | 10 | ||||
-rw-r--r-- | kernel/trace/trace.c | 37 | ||||
-rw-r--r-- | kernel/trace/trace_branch.c | 8 | ||||
-rw-r--r-- | kernel/trace/trace_events.c | 12 | ||||
-rw-r--r-- | kernel/trace/trace_events_filter.c | 14 | ||||
-rw-r--r-- | kernel/trace/trace_events_stage_2.h | 4 | ||||
-rw-r--r-- | kernel/trace/trace_power.c | 7 | ||||
-rw-r--r-- | kernel/trace/trace_syscalls.c | 2 |
9 files changed, 65 insertions, 33 deletions
diff --git a/kernel/trace/Kconfig b/kernel/trace/Kconfig index 2246141bda4..417d1985e29 100644 --- a/kernel/trace/Kconfig +++ b/kernel/trace/Kconfig @@ -312,7 +312,7 @@ config KMEMTRACE and profile kernel code. This requires an userspace application to use. See - Documentation/vm/kmemtrace.txt for more information. + Documentation/trace/kmemtrace.txt for more information. Saying Y will make the kernel somewhat larger and slower. However, if you disable kmemtrace at run-time or boot-time, the performance @@ -403,7 +403,7 @@ config MMIOTRACE implementation and works via page faults. Tracing is disabled by default and can be enabled at run-time. - See Documentation/tracers/mmiotrace.txt. + See Documentation/trace/mmiotrace.txt. If you are not helping to develop drivers, say N. config MMIOTRACE_TEST diff --git a/kernel/trace/blktrace.c b/kernel/trace/blktrace.c index b32ff446c3f..921ef5d1f0b 100644 --- a/kernel/trace/blktrace.c +++ b/kernel/trace/blktrace.c @@ -1377,12 +1377,12 @@ static int blk_trace_str2mask(const char *str) { int i; int mask = 0; - char *s, *token; + char *buf, *s, *token; - s = kstrdup(str, GFP_KERNEL); - if (s == NULL) + buf = kstrdup(str, GFP_KERNEL); + if (buf == NULL) return -ENOMEM; - s = strstrip(s); + s = strstrip(buf); while (1) { token = strsep(&s, ","); @@ -1403,7 +1403,7 @@ static int blk_trace_str2mask(const char *str) break; } } - kfree(s); + kfree(buf); return mask; } diff --git a/kernel/trace/trace.c b/kernel/trace/trace.c index 9d28476a985..a884c09006c 100644 --- a/kernel/trace/trace.c +++ b/kernel/trace/trace.c @@ -3277,19 +3277,13 @@ static int tracing_buffers_open(struct inode *inode, struct file *filp) info->tr = &global_trace; info->cpu = cpu; - info->spare = ring_buffer_alloc_read_page(info->tr->buffer); + info->spare = NULL; /* Force reading ring buffer for first read */ info->read = (unsigned int)-1; - if (!info->spare) - goto out; filp->private_data = info; - return 0; - - out: - kfree(info); - return -ENOMEM; + return nonseekable_open(inode, filp); } static ssize_t @@ -3304,6 +3298,11 @@ tracing_buffers_read(struct file *filp, char __user *ubuf, if (!count) return 0; + if (!info->spare) + info->spare = ring_buffer_alloc_read_page(info->tr->buffer); + if (!info->spare) + return -ENOMEM; + /* Do we have previous read data to read? */ if (info->read < PAGE_SIZE) goto read; @@ -3342,7 +3341,8 @@ static int tracing_buffers_release(struct inode *inode, struct file *file) { struct ftrace_buffer_info *info = file->private_data; - ring_buffer_free_read_page(info->tr->buffer, info->spare); + if (info->spare) + ring_buffer_free_read_page(info->tr->buffer, info->spare); kfree(info); return 0; @@ -3428,14 +3428,19 @@ tracing_buffers_splice_read(struct file *file, loff_t *ppos, int size, i; size_t ret; - /* - * We can't seek on a buffer input - */ - if (unlikely(*ppos)) - return -ESPIPE; + if (*ppos & (PAGE_SIZE - 1)) { + WARN_ONCE(1, "Ftrace: previous read must page-align\n"); + return -EINVAL; + } + if (len & (PAGE_SIZE - 1)) { + WARN_ONCE(1, "Ftrace: splice_read should page-align\n"); + if (len < PAGE_SIZE) + return -EINVAL; + len &= PAGE_MASK; + } - for (i = 0; i < PIPE_BUFFERS && len; i++, len -= size) { + for (i = 0; i < PIPE_BUFFERS && len; i++, len -= PAGE_SIZE) { struct page *page; int r; @@ -3443,6 +3448,7 @@ tracing_buffers_splice_read(struct file *file, loff_t *ppos, if (!ref) break; + ref->ref = 1; ref->buffer = info->tr->buffer; ref->page = ring_buffer_alloc_read_page(ref->buffer); if (!ref->page) { @@ -3474,6 +3480,7 @@ tracing_buffers_splice_read(struct file *file, loff_t *ppos, spd.partial[i].offset = 0; spd.partial[i].private = (unsigned long)ref; spd.nr_pages++; + *ppos += PAGE_SIZE; } spd.nr_pages = i; diff --git a/kernel/trace/trace_branch.c b/kernel/trace/trace_branch.c index ad8c22efff4..8333715e406 100644 --- a/kernel/trace/trace_branch.c +++ b/kernel/trace/trace_branch.c @@ -155,6 +155,13 @@ static enum print_line_t trace_branch_print(struct trace_iterator *iter, return TRACE_TYPE_HANDLED; } +static void branch_print_header(struct seq_file *s) +{ + seq_puts(s, "# TASK-PID CPU# TIMESTAMP CORRECT" + " FUNC:FILE:LINE\n"); + seq_puts(s, "# | | | | | " + " |\n"); +} static struct trace_event trace_branch_event = { .type = TRACE_BRANCH, @@ -169,6 +176,7 @@ static struct tracer branch_trace __read_mostly = #ifdef CONFIG_FTRACE_SELFTEST .selftest = trace_selftest_startup_branch, #endif /* CONFIG_FTRACE_SELFTEST */ + .print_header = branch_print_header, }; __init static int init_branch_tracer(void) diff --git a/kernel/trace/trace_events.c b/kernel/trace/trace_events.c index 64ec4d278ff..576f4fa2af0 100644 --- a/kernel/trace/trace_events.c +++ b/kernel/trace/trace_events.c @@ -503,6 +503,7 @@ event_filter_write(struct file *filp, const char __user *ubuf, size_t cnt, if (copy_from_user(&buf, ubuf, cnt)) return -EFAULT; + buf[cnt] = '\0'; pred = kzalloc(sizeof(*pred), GFP_KERNEL); if (!pred) @@ -520,9 +521,10 @@ event_filter_write(struct file *filp, const char __user *ubuf, size_t cnt, return cnt; } - if (filter_add_pred(call, pred)) { + err = filter_add_pred(call, pred); + if (err < 0) { filter_free_pred(pred); - return -EINVAL; + return err; } *ppos += cnt; @@ -569,6 +571,7 @@ subsystem_filter_write(struct file *filp, const char __user *ubuf, size_t cnt, if (copy_from_user(&buf, ubuf, cnt)) return -EFAULT; + buf[cnt] = '\0'; pred = kzalloc(sizeof(*pred), GFP_KERNEL); if (!pred) @@ -586,10 +589,11 @@ subsystem_filter_write(struct file *filp, const char __user *ubuf, size_t cnt, return cnt; } - if (filter_add_subsystem_pred(system, pred)) { + err = filter_add_subsystem_pred(system, pred); + if (err < 0) { filter_free_subsystem_preds(system); filter_free_pred(pred); - return -EINVAL; + return err; } *ppos += cnt; diff --git a/kernel/trace/trace_events_filter.c b/kernel/trace/trace_events_filter.c index 026be412f35..e03cbf1e38f 100644 --- a/kernel/trace/trace_events_filter.c +++ b/kernel/trace/trace_events_filter.c @@ -215,7 +215,7 @@ static int __filter_add_pred(struct ftrace_event_call *call, } } - return -ENOMEM; + return -ENOSPC; } static int is_string_field(const char *type) @@ -319,7 +319,7 @@ int filter_add_subsystem_pred(struct event_subsystem *system, } if (i == MAX_FILTER_PRED) - return -EINVAL; + return -ENOSPC; events_for_each(call) { int err; @@ -410,16 +410,22 @@ int filter_parse(char **pbuf, struct filter_pred *pred) } } + if (!val_str) { + pred->field_name = NULL; + return -EINVAL; + } + pred->field_name = kstrdup(pred->field_name, GFP_KERNEL); if (!pred->field_name) return -ENOMEM; - pred->val = simple_strtoull(val_str, &tmp, 10); + pred->val = simple_strtoull(val_str, &tmp, 0); if (tmp == val_str) { pred->str_val = kstrdup(val_str, GFP_KERNEL); if (!pred->str_val) return -ENOMEM; - } + } else if (*tmp != '\0') + return -EINVAL; return 0; } diff --git a/kernel/trace/trace_events_stage_2.h b/kernel/trace/trace_events_stage_2.h index 30743f7d411..d363c6672c6 100644 --- a/kernel/trace/trace_events_stage_2.h +++ b/kernel/trace/trace_events_stage_2.h @@ -105,10 +105,10 @@ ftrace_raw_output_##call(struct trace_iterator *iter, int flags) \ return 0; #undef __entry -#define __entry "REC" +#define __entry REC #undef TP_printk -#define TP_printk(fmt, args...) "%s, %s\n", #fmt, #args +#define TP_printk(fmt, args...) "%s, %s\n", #fmt, __stringify(args) #undef TP_fast_assign #define TP_fast_assign(args...) args diff --git a/kernel/trace/trace_power.c b/kernel/trace/trace_power.c index bae791ebcc5..118439709fb 100644 --- a/kernel/trace/trace_power.c +++ b/kernel/trace/trace_power.c @@ -186,6 +186,12 @@ static enum print_line_t power_print_line(struct trace_iterator *iter) return TRACE_TYPE_UNHANDLED; } +static void power_print_header(struct seq_file *s) +{ + seq_puts(s, "# TIMESTAMP STATE EVENT\n"); + seq_puts(s, "# | | |\n"); +} + static struct tracer power_tracer __read_mostly = { .name = "power", @@ -194,6 +200,7 @@ static struct tracer power_tracer __read_mostly = .stop = stop_power_trace, .reset = power_trace_reset, .print_line = power_print_line, + .print_header = power_print_header, }; static int init_power_trace(void) diff --git a/kernel/trace/trace_syscalls.c b/kernel/trace/trace_syscalls.c index a2a3af29c94..5e579645ac8 100644 --- a/kernel/trace/trace_syscalls.c +++ b/kernel/trace/trace_syscalls.c @@ -1,5 +1,5 @@ +#include <trace/syscall.h> #include <linux/kernel.h> -#include <linux/ftrace.h> #include <asm/syscall.h> #include "trace_output.h" |