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ftrace: rename _hook to _probe 

Impact: clean up

Ingo Molnar did not like the _hook naming convention used by the
select function tracer. Luis Claudio R. Goncalves suggested using
the "_probe" extension. This patch implements the change of
calling the functions and variables "_hook" and replacing them
with "_probe".

Signed-off-by: Steven Rostedt <srostedt@redhat.com>
This commit is contained in:
Steven Rostedt 2009-02-17 12:32:04 -05:00
parent 6a24a244cd
commit b6887d7916
3 changed files with 58 additions and 58 deletions
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12
include/linux/ftrace.h
View File

@ -108,7 +108,7 @@ struct ftrace_func_command {
struct seq_file; struct seq_file;
struct ftrace_hook_ops { struct ftrace_probe_ops {
void (*func)(unsigned long ip, void (*func)(unsigned long ip,
unsigned long parent_ip, unsigned long parent_ip,
void **data); void **data);
@ -116,19 +116,19 @@ struct ftrace_hook_ops {
void (*free)(void **data); void (*free)(void **data);
int (*print)(struct seq_file *m, int (*print)(struct seq_file *m,
unsigned long ip, unsigned long ip,
struct ftrace_hook_ops *ops, struct ftrace_probe_ops *ops,
void *data); void *data);
}; };
extern int extern int
register_ftrace_function_hook(char *glob, struct ftrace_hook_ops *ops, register_ftrace_function_probe(char *glob, struct ftrace_probe_ops *ops,
void *data); void *data);
extern void extern void
unregister_ftrace_function_hook(char *glob, struct ftrace_hook_ops *ops, unregister_ftrace_function_probe(char *glob, struct ftrace_probe_ops *ops,
void *data); void *data);
extern void extern void
unregister_ftrace_function_hook_func(char *glob, struct ftrace_hook_ops *ops); unregister_ftrace_function_probe_func(char *glob, struct ftrace_probe_ops *ops);
extern void unregister_ftrace_function_hook_all(char *glob); extern void unregister_ftrace_function_probe_all(char *glob);
enum { enum {
FTRACE_FL_FREE = (1 << 0), FTRACE_FL_FREE = (1 << 0),

78
kernel/trace/ftrace.c
View File

@ -255,9 +255,9 @@ static struct pid * const ftrace_swapper_pid = &init_struct_pid;
static struct hlist_head ftrace_func_hash[FTRACE_FUNC_HASHSIZE] __read_mostly; static struct hlist_head ftrace_func_hash[FTRACE_FUNC_HASHSIZE] __read_mostly;
struct ftrace_func_hook { struct ftrace_func_probe {
struct hlist_node node; struct hlist_node node;
struct ftrace_hook_ops *ops; struct ftrace_probe_ops *ops;
unsigned long flags; unsigned long flags;
unsigned long ip; unsigned long ip;
void *data; void *data;
@ -830,11 +830,11 @@ static void *t_hash_start(struct seq_file *m, loff_t *pos)
static int t_hash_show(struct seq_file *m, void *v) static int t_hash_show(struct seq_file *m, void *v)
{ {
struct ftrace_func_hook *rec; struct ftrace_func_probe *rec;
struct hlist_node *hnd = v; struct hlist_node *hnd = v;
char str[KSYM_SYMBOL_LEN]; char str[KSYM_SYMBOL_LEN];
rec = hlist_entry(hnd, struct ftrace_func_hook, node); rec = hlist_entry(hnd, struct ftrace_func_probe, node);
if (rec->ops->print) if (rec->ops->print)
return rec->ops->print(m, rec->ip, rec->ops, rec->data); return rec->ops->print(m, rec->ip, rec->ops, rec->data);
@ -1351,9 +1351,9 @@ static int __init ftrace_mod_cmd_init(void)
device_initcall(ftrace_mod_cmd_init); device_initcall(ftrace_mod_cmd_init);
static void static void
function_trace_hook_call(unsigned long ip, unsigned long parent_ip) function_trace_probe_call(unsigned long ip, unsigned long parent_ip)
{ {
struct ftrace_func_hook *entry; struct ftrace_func_probe *entry;
struct hlist_head *hhd; struct hlist_head *hhd;
struct hlist_node *n; struct hlist_node *n;
unsigned long key; unsigned long key;
@ -1379,18 +1379,18 @@ function_trace_hook_call(unsigned long ip, unsigned long parent_ip)
ftrace_preempt_enable(resched); ftrace_preempt_enable(resched);
} }
static struct ftrace_ops trace_hook_ops __read_mostly = static struct ftrace_ops trace_probe_ops __read_mostly =
{ {
.func = function_trace_hook_call, .func = function_trace_probe_call,
}; };
static int ftrace_hook_registered; static int ftrace_probe_registered;
static void __enable_ftrace_function_hook(void) static void __enable_ftrace_function_probe(void)
{ {
int i; int i;
if (ftrace_hook_registered) if (ftrace_probe_registered)
return; return;
for (i = 0; i < FTRACE_FUNC_HASHSIZE; i++) { for (i = 0; i < FTRACE_FUNC_HASHSIZE; i++) {
@ -1402,16 +1402,16 @@ static void __enable_ftrace_function_hook(void)
if (i == FTRACE_FUNC_HASHSIZE) if (i == FTRACE_FUNC_HASHSIZE)
return; return;
__register_ftrace_function(&trace_hook_ops); __register_ftrace_function(&trace_probe_ops);
ftrace_startup(0); ftrace_startup(0);
ftrace_hook_registered = 1; ftrace_probe_registered = 1;
} }
static void __disable_ftrace_function_hook(void) static void __disable_ftrace_function_probe(void)
{ {
int i; int i;
if (!ftrace_hook_registered) if (!ftrace_probe_registered)
return; return;
for (i = 0; i < FTRACE_FUNC_HASHSIZE; i++) { for (i = 0; i < FTRACE_FUNC_HASHSIZE; i++) {
@ -1421,16 +1421,16 @@ static void __disable_ftrace_function_hook(void)
} }
/* no more funcs left */ /* no more funcs left */
__unregister_ftrace_function(&trace_hook_ops); __unregister_ftrace_function(&trace_probe_ops);
ftrace_shutdown(0); ftrace_shutdown(0);
ftrace_hook_registered = 0; ftrace_probe_registered = 0;
} }
static void ftrace_free_entry_rcu(struct rcu_head *rhp) static void ftrace_free_entry_rcu(struct rcu_head *rhp)
{ {
struct ftrace_func_hook *entry = struct ftrace_func_probe *entry =
container_of(rhp, struct ftrace_func_hook, rcu); container_of(rhp, struct ftrace_func_probe, rcu);
if (entry->ops->free) if (entry->ops->free)
entry->ops->free(&entry->data); entry->ops->free(&entry->data);
@ -1439,10 +1439,10 @@ static void ftrace_free_entry_rcu(struct rcu_head *rhp)
int int
register_ftrace_function_hook(char *glob, struct ftrace_hook_ops *ops, register_ftrace_function_probe(char *glob, struct ftrace_probe_ops *ops,
void *data) void *data)
{ {
struct ftrace_func_hook *entry; struct ftrace_func_probe *entry;
struct ftrace_page *pg; struct ftrace_page *pg;
struct dyn_ftrace *rec; struct dyn_ftrace *rec;
int type, len, not; int type, len, not;
@ -1453,7 +1453,7 @@ register_ftrace_function_hook(char *glob, struct ftrace_hook_ops *ops,
type = ftrace_setup_glob(glob, strlen(glob), &search, &not); type = ftrace_setup_glob(glob, strlen(glob), &search, &not);
len = strlen(search); len = strlen(search);
/* we do not support '!' for function hooks */ /* we do not support '!' for function probes */
if (WARN_ON(not)) if (WARN_ON(not))
return -EINVAL; return -EINVAL;
@ -1468,7 +1468,7 @@ register_ftrace_function_hook(char *glob, struct ftrace_hook_ops *ops,
entry = kmalloc(sizeof(*entry), GFP_KERNEL); entry = kmalloc(sizeof(*entry), GFP_KERNEL);
if (!entry) { if (!entry) {
/* If we did not hook to any, then return error */ /* If we did not process any, then return error */
if (!count) if (!count)
count = -ENOMEM; count = -ENOMEM;
goto out_unlock; goto out_unlock;
@ -1498,7 +1498,7 @@ register_ftrace_function_hook(char *glob, struct ftrace_hook_ops *ops,
hlist_add_head_rcu(&entry->node, &ftrace_func_hash[key]); hlist_add_head_rcu(&entry->node, &ftrace_func_hash[key]);
} while_for_each_ftrace_rec(); } while_for_each_ftrace_rec();
__enable_ftrace_function_hook(); __enable_ftrace_function_probe();
out_unlock: out_unlock:
mutex_unlock(&ftrace_lock); mutex_unlock(&ftrace_lock);
@ -1507,15 +1507,15 @@ register_ftrace_function_hook(char *glob, struct ftrace_hook_ops *ops,
} }
enum { enum {
HOOK_TEST_FUNC = 1, PROBE_TEST_FUNC = 1,
HOOK_TEST_DATA = 2 PROBE_TEST_DATA = 2
}; };
static void static void
__unregister_ftrace_function_hook(char *glob, struct ftrace_hook_ops *ops, __unregister_ftrace_function_probe(char *glob, struct ftrace_probe_ops *ops,
void *data, int flags) void *data, int flags)
{ {
struct ftrace_func_hook *entry; struct ftrace_func_probe *entry;
struct hlist_node *n, *tmp; struct hlist_node *n, *tmp;
char str[KSYM_SYMBOL_LEN]; char str[KSYM_SYMBOL_LEN];
int type = MATCH_FULL; int type = MATCH_FULL;
@ -1530,7 +1530,7 @@ __unregister_ftrace_function_hook(char *glob, struct ftrace_hook_ops *ops,
type = ftrace_setup_glob(glob, strlen(glob), &search, &not); type = ftrace_setup_glob(glob, strlen(glob), &search, &not);
len = strlen(search); len = strlen(search);
/* we do not support '!' for function hooks */ /* we do not support '!' for function probes */
if (WARN_ON(not)) if (WARN_ON(not))
return; return;
} }
@ -1542,10 +1542,10 @@ __unregister_ftrace_function_hook(char *glob, struct ftrace_hook_ops *ops,
hlist_for_each_entry_safe(entry, n, tmp, hhd, node) { hlist_for_each_entry_safe(entry, n, tmp, hhd, node) {
/* break up if statements for readability */ /* break up if statements for readability */
if ((flags & HOOK_TEST_FUNC) && entry->ops != ops) if ((flags & PROBE_TEST_FUNC) && entry->ops != ops)
continue; continue;
if ((flags & HOOK_TEST_DATA) && entry->data != data) if ((flags & PROBE_TEST_DATA) && entry->data != data)
continue; continue;
/* do this last, since it is the most expensive */ /* do this last, since it is the most expensive */
@ -1560,27 +1560,27 @@ __unregister_ftrace_function_hook(char *glob, struct ftrace_hook_ops *ops,
call_rcu(&entry->rcu, ftrace_free_entry_rcu); call_rcu(&entry->rcu, ftrace_free_entry_rcu);
} }
} }
__disable_ftrace_function_hook(); __disable_ftrace_function_probe();
mutex_unlock(&ftrace_lock); mutex_unlock(&ftrace_lock);
} }
void void
unregister_ftrace_function_hook(char *glob, struct ftrace_hook_ops *ops, unregister_ftrace_function_probe(char *glob, struct ftrace_probe_ops *ops,
void *data) void *data)
{ {
__unregister_ftrace_function_hook(glob, ops, data, __unregister_ftrace_function_probe(glob, ops, data,
HOOK_TEST_FUNC | HOOK_TEST_DATA); PROBE_TEST_FUNC | PROBE_TEST_DATA);
} }
void void
unregister_ftrace_function_hook_func(char *glob, struct ftrace_hook_ops *ops) unregister_ftrace_function_probe_func(char *glob, struct ftrace_probe_ops *ops)
{ {
__unregister_ftrace_function_hook(glob, ops, NULL, HOOK_TEST_FUNC); __unregister_ftrace_function_probe(glob, ops, NULL, PROBE_TEST_FUNC);
} }
void unregister_ftrace_function_hook_all(char *glob) void unregister_ftrace_function_probe_all(char *glob)
{ {
__unregister_ftrace_function_hook(glob, NULL, NULL, 0); __unregister_ftrace_function_probe(glob, NULL, NULL, 0);
} }
static LIST_HEAD(ftrace_commands); static LIST_HEAD(ftrace_commands);

26
kernel/trace/trace_functions.c
View File

@ -269,21 +269,21 @@ ftrace_traceoff(unsigned long ip, unsigned long parent_ip, void **data)
static int static int
ftrace_trace_onoff_print(struct seq_file *m, unsigned long ip, ftrace_trace_onoff_print(struct seq_file *m, unsigned long ip,
struct ftrace_hook_ops *ops, void *data); struct ftrace_probe_ops *ops, void *data);
static struct ftrace_hook_ops traceon_hook_ops = { static struct ftrace_probe_ops traceon_probe_ops = {
.func = ftrace_traceon, .func = ftrace_traceon,
.print = ftrace_trace_onoff_print, .print = ftrace_trace_onoff_print,
}; };
static struct ftrace_hook_ops traceoff_hook_ops = { static struct ftrace_probe_ops traceoff_probe_ops = {
.func = ftrace_traceoff, .func = ftrace_traceoff,
.print = ftrace_trace_onoff_print, .print = ftrace_trace_onoff_print,
}; };
static int static int
ftrace_trace_onoff_print(struct seq_file *m, unsigned long ip, ftrace_trace_onoff_print(struct seq_file *m, unsigned long ip,
struct ftrace_hook_ops *ops, void *data) struct ftrace_probe_ops *ops, void *data)
{ {
char str[KSYM_SYMBOL_LEN]; char str[KSYM_SYMBOL_LEN];
long count = (long)data; long count = (long)data;
@ -291,7 +291,7 @@ ftrace_trace_onoff_print(struct seq_file *m, unsigned long ip,
kallsyms_lookup(ip, NULL, NULL, NULL, str); kallsyms_lookup(ip, NULL, NULL, NULL, str);
seq_printf(m, "%s:", str); seq_printf(m, "%s:", str);
if (ops == &traceon_hook_ops) if (ops == &traceon_probe_ops)
seq_printf(m, "traceon"); seq_printf(m, "traceon");
else else
seq_printf(m, "traceoff"); seq_printf(m, "traceoff");
@ -306,15 +306,15 @@ ftrace_trace_onoff_print(struct seq_file *m, unsigned long ip,
static int static int
ftrace_trace_onoff_unreg(char *glob, char *cmd, char *param) ftrace_trace_onoff_unreg(char *glob, char *cmd, char *param)
{ {
struct ftrace_hook_ops *ops; struct ftrace_probe_ops *ops;
/* we register both traceon and traceoff to this callback */ /* we register both traceon and traceoff to this callback */
if (strcmp(cmd, "traceon") == 0) if (strcmp(cmd, "traceon") == 0)
ops = &traceon_hook_ops; ops = &traceon_probe_ops;
else else
ops = &traceoff_hook_ops; ops = &traceoff_probe_ops;
unregister_ftrace_function_hook_func(glob, ops); unregister_ftrace_function_probe_func(glob, ops);
return 0; return 0;
} }
@ -322,7 +322,7 @@ ftrace_trace_onoff_unreg(char *glob, char *cmd, char *param)
static int static int
ftrace_trace_onoff_callback(char *glob, char *cmd, char *param, int enable) ftrace_trace_onoff_callback(char *glob, char *cmd, char *param, int enable)
{ {
struct ftrace_hook_ops *ops; struct ftrace_probe_ops *ops;
void *count = (void *)-1; void *count = (void *)-1;
char *number; char *number;
int ret; int ret;
@ -336,9 +336,9 @@ ftrace_trace_onoff_callback(char *glob, char *cmd, char *param, int enable)
/* we register both traceon and traceoff to this callback */ /* we register both traceon and traceoff to this callback */
if (strcmp(cmd, "traceon") == 0) if (strcmp(cmd, "traceon") == 0)
ops = &traceon_hook_ops; ops = &traceon_probe_ops;
else else
ops = &traceoff_hook_ops; ops = &traceoff_probe_ops;
if (!param) if (!param)
goto out_reg; goto out_reg;
@ -357,7 +357,7 @@ ftrace_trace_onoff_callback(char *glob, char *cmd, char *param, int enable)
return ret; return ret;
out_reg: out_reg:
ret = register_ftrace_function_hook(glob, ops, count); ret = register_ftrace_function_probe(glob, ops, count);
return ret; return ret;
} }