diff options
Diffstat (limited to 'kernel/trace/trace_events_filter.c')
| -rw-r--r-- | kernel/trace/trace_events_filter.c | 119 |
1 files changed, 76 insertions, 43 deletions
diff --git a/kernel/trace/trace_events_filter.c b/kernel/trace/trace_events_filter.c index 9daa9b3bc6d9..59a411ff60c7 100644 --- a/kernel/trace/trace_events_filter.c +++ b/kernel/trace/trace_events_filter.c @@ -108,12 +108,12 @@ static char *err_text[] = { }; struct opstack_op { - int op; + enum filter_op_ids op; struct list_head list; }; struct postfix_elt { - int op; + enum filter_op_ids op; char *operand; struct list_head list; }; @@ -145,34 +145,50 @@ struct pred_stack { /* If not of not match is equal to not of not, then it is a match */ #define DEFINE_COMPARISON_PRED(type) \ -static int filter_pred_##type(struct filter_pred *pred, void *event) \ +static int filter_pred_LT_##type(struct filter_pred *pred, void *event) \ { \ type *addr = (type *)(event + pred->offset); \ type val = (type)pred->val; \ - int match = 0; \ - \ - switch (pred->op) { \ - case OP_LT: \ - match = (*addr < val); \ - break; \ - case OP_LE: \ - match = (*addr <= val); \ - break; \ - case OP_GT: \ - match = (*addr > val); \ - break; \ - case OP_GE: \ - match = (*addr >= val); \ - break; \ - case OP_BAND: \ - match = (*addr & val); \ - break; \ - default: \ - break; \ - } \ - \ + int match = (*addr < val); \ return !!match == !pred->not; \ -} +} \ +static int filter_pred_LE_##type(struct filter_pred *pred, void *event) \ +{ \ + type *addr = (type *)(event + pred->offset); \ + type val = (type)pred->val; \ + int match = (*addr <= val); \ + return !!match == !pred->not; \ +} \ +static int filter_pred_GT_##type(struct filter_pred *pred, void *event) \ +{ \ + type *addr = (type *)(event + pred->offset); \ + type val = (type)pred->val; \ + int match = (*addr > val); \ + return !!match == !pred->not; \ +} \ +static int filter_pred_GE_##type(struct filter_pred *pred, void *event) \ +{ \ + type *addr = (type *)(event + pred->offset); \ + type val = (type)pred->val; \ + int match = (*addr >= val); \ + return !!match == !pred->not; \ +} \ +static int filter_pred_BAND_##type(struct filter_pred *pred, void *event) \ +{ \ + type *addr = (type *)(event + pred->offset); \ + type val = (type)pred->val; \ + int match = !!(*addr & val); \ + return match == !pred->not; \ +} \ +static const filter_pred_fn_t pred_funcs_##type[] = { \ + filter_pred_LT_##type, \ + filter_pred_LE_##type, \ + filter_pred_GT_##type, \ + filter_pred_GE_##type, \ + filter_pred_BAND_##type, \ +}; + +#define PRED_FUNC_START OP_LT #define DEFINE_EQUALITY_PRED(size) \ static int filter_pred_##size(struct filter_pred *pred, void *event) \ @@ -344,6 +360,12 @@ static int regex_match_end(char *str, struct regex *r, int len) return 0; } +static int regex_match_glob(char *str, struct regex *r, int len __maybe_unused) +{ + if (glob_match(r->pattern, str)) + return 1; + return 0; +} /** * filter_parse_regex - parse a basic regex * @buff: the raw regex @@ -380,14 +402,20 @@ enum regex_type filter_parse_regex(char *buff, int len, char **search, int *not) if (!i) { *search = buff + 1; type = MATCH_END_ONLY; - } else { + } else if (i == len - 1) { if (type == MATCH_END_ONLY) type = MATCH_MIDDLE_ONLY; else type = MATCH_FRONT_ONLY; buff[i] = 0; break; + } else { /* pattern continues, use full glob */ + type = MATCH_GLOB; + break; } + } else if (strchr("[?\\", buff[i])) { + type = MATCH_GLOB; + break; } } @@ -420,6 +448,9 @@ static void filter_build_regex(struct filter_pred *pred) case MATCH_END_ONLY: r->match = regex_match_end; break; + case MATCH_GLOB: + r->match = regex_match_glob; + break; } pred->not ^= not; @@ -946,7 +977,7 @@ int filter_assign_type(const char *type) return FILTER_OTHER; } -static bool is_legal_op(struct ftrace_event_field *field, int op) +static bool is_legal_op(struct ftrace_event_field *field, enum filter_op_ids op) { if (is_string_field(field) && (op != OP_EQ && op != OP_NE && op != OP_GLOB)) @@ -957,8 +988,8 @@ static bool is_legal_op(struct ftrace_event_field *field, int op) return true; } -static filter_pred_fn_t select_comparison_fn(int op, int field_size, - int field_is_signed) +static filter_pred_fn_t select_comparison_fn(enum filter_op_ids op, + int field_size, int field_is_signed) { filter_pred_fn_t fn = NULL; @@ -967,33 +998,33 @@ static filter_pred_fn_t select_comparison_fn(int op, int field_size, if (op == OP_EQ || op == OP_NE) fn = filter_pred_64; else if (field_is_signed) - fn = filter_pred_s64; + fn = pred_funcs_s64[op - PRED_FUNC_START]; else - fn = filter_pred_u64; + fn = pred_funcs_u64[op - PRED_FUNC_START]; break; case 4: if (op == OP_EQ || op == OP_NE) fn = filter_pred_32; else if (field_is_signed) - fn = filter_pred_s32; + fn = pred_funcs_s32[op - PRED_FUNC_START]; else - fn = filter_pred_u32; + fn = pred_funcs_u32[op - PRED_FUNC_START]; break; case 2: if (op == OP_EQ || op == OP_NE) fn = filter_pred_16; else if (field_is_signed) - fn = filter_pred_s16; + fn = pred_funcs_s16[op - PRED_FUNC_START]; else - fn = filter_pred_u16; + fn = pred_funcs_u16[op - PRED_FUNC_START]; break; case 1: if (op == OP_EQ || op == OP_NE) fn = filter_pred_8; else if (field_is_signed) - fn = filter_pred_s8; + fn = pred_funcs_s8[op - PRED_FUNC_START]; else - fn = filter_pred_u8; + fn = pred_funcs_u8[op - PRED_FUNC_START]; break; } @@ -1166,7 +1197,8 @@ static inline int append_operand_char(struct filter_parse_state *ps, char c) return 0; } -static int filter_opstack_push(struct filter_parse_state *ps, int op) +static int filter_opstack_push(struct filter_parse_state *ps, + enum filter_op_ids op) { struct opstack_op *opstack_op; @@ -1200,7 +1232,7 @@ static int filter_opstack_top(struct filter_parse_state *ps) static int filter_opstack_pop(struct filter_parse_state *ps) { struct opstack_op *opstack_op; - int op; + enum filter_op_ids op; if (filter_opstack_empty(ps)) return OP_NONE; @@ -1245,7 +1277,7 @@ static int postfix_append_operand(struct filter_parse_state *ps, char *operand) return 0; } -static int postfix_append_op(struct filter_parse_state *ps, int op) +static int postfix_append_op(struct filter_parse_state *ps, enum filter_op_ids op) { struct postfix_elt *elt; @@ -1275,8 +1307,8 @@ static void postfix_clear(struct filter_parse_state *ps) static int filter_parse(struct filter_parse_state *ps) { + enum filter_op_ids op, top_op; int in_string = 0; - int op, top_op; char ch; while ((ch = infix_next(ps))) { @@ -1367,7 +1399,8 @@ parse_operand: static struct filter_pred *create_pred(struct filter_parse_state *ps, struct trace_event_call *call, - int op, char *operand1, char *operand2) + enum filter_op_ids op, + char *operand1, char *operand2) { struct ftrace_event_field *field; static struct filter_pred pred; |