Implement tracepoint wildcard support

[lttng-modules.git] / lttng-syscalls.c

diff --git a/lttng-syscalls.c b/lttng-syscalls.c
index 622da6e206a5c683a5c1b006387789c46ac0126e..ee09a0419498a07f0dc06a0bb0f56afcc8a3771a 100644 (file)
--- a/lttng-syscalls.c
+++ b/lttng-syscalls.c
@@ -29,11 +29,14 @@
 #include <linux/in6.h>
 #include <linux/seq_file.h>
 #include <linux/stringify.h>
+#include <linux/file.h>
+#include <linux/anon_inodes.h>
 #include <asm/ptrace.h>
 #include <asm/syscall.h>
 
 #include "lib/bitfield.h"
 #include "wrapper/tracepoint.h"
+#include "wrapper/file.h"
 #include "lttng-events.h"
 
 #ifndef CONFIG_COMPAT
@@ -714,7 +717,7 @@ int fill_table(const struct trace_syscall_entry *table, size_t table_len,
                ev.name[LTTNG_KERNEL_SYM_NAME_LEN - 1] = '\0';
                ev.instrumentation = LTTNG_KERNEL_NOOP;
                chan_table[i] = lttng_event_create(chan, &ev, filter,
-                                               desc);
+                                               desc, ev.instrumentation);
                WARN_ON_ONCE(!chan_table[i]);
                if (IS_ERR(chan_table[i])) {
                        /*
@@ -778,7 +781,8 @@ int lttng_syscalls_register(struct lttng_channel *chan, void *filter)
                ev.name[LTTNG_KERNEL_SYM_NAME_LEN - 1] = '\0';
                ev.instrumentation = LTTNG_KERNEL_NOOP;
                chan->sc_unknown = lttng_event_create(chan, &ev, filter,
-                                                   desc);
+                                               desc,
+                                               ev.instrumentation);
                WARN_ON_ONCE(!chan->sc_unknown);
                if (IS_ERR(chan->sc_unknown)) {
                        return PTR_ERR(chan->sc_unknown);
@@ -794,7 +798,8 @@ int lttng_syscalls_register(struct lttng_channel *chan, void *filter)
                ev.name[LTTNG_KERNEL_SYM_NAME_LEN - 1] = '\0';
                ev.instrumentation = LTTNG_KERNEL_NOOP;
                chan->sc_compat_unknown = lttng_event_create(chan, &ev, filter,
-                                                          desc);
+                                               desc,
+                                               ev.instrumentation);
                WARN_ON_ONCE(!chan->sc_unknown);
                if (IS_ERR(chan->sc_compat_unknown)) {
                        return PTR_ERR(chan->sc_compat_unknown);
@@ -810,7 +815,8 @@ int lttng_syscalls_register(struct lttng_channel *chan, void *filter)
                ev.name[LTTNG_KERNEL_SYM_NAME_LEN - 1] = '\0';
                ev.instrumentation = LTTNG_KERNEL_NOOP;
                chan->compat_sc_exit_unknown = lttng_event_create(chan, &ev,
-                                               filter, desc);
+                                               filter, desc,
+                                               ev.instrumentation);
                WARN_ON_ONCE(!chan->compat_sc_exit_unknown);
                if (IS_ERR(chan->compat_sc_exit_unknown)) {
                        return PTR_ERR(chan->compat_sc_exit_unknown);
@@ -826,7 +832,7 @@ int lttng_syscalls_register(struct lttng_channel *chan, void *filter)
                ev.name[LTTNG_KERNEL_SYM_NAME_LEN - 1] = '\0';
                ev.instrumentation = LTTNG_KERNEL_NOOP;
                chan->sc_exit_unknown = lttng_event_create(chan, &ev, filter,
-                                                desc);
+                                               desc, ev.instrumentation);
                WARN_ON_ONCE(!chan->sc_exit_unknown);
                if (IS_ERR(chan->sc_exit_unknown)) {
                        return PTR_ERR(chan->sc_exit_unknown);
@@ -1261,3 +1267,39 @@ long lttng_channel_syscall_mask(struct lttng_channel *channel,
        kfree(tmp_mask);
        return ret;
 }
+
+int lttng_abi_syscall_list(void)
+{
+       struct file *syscall_list_file;
+       int file_fd, ret;
+
+       file_fd = lttng_get_unused_fd();
+       if (file_fd < 0) {
+               ret = file_fd;
+               goto fd_error;
+       }
+
+       syscall_list_file = anon_inode_getfile("[lttng_syscall_list]",
+                                         &lttng_syscall_list_fops,
+                                         NULL, O_RDWR);
+       if (IS_ERR(syscall_list_file)) {
+               ret = PTR_ERR(syscall_list_file);
+               goto file_error;
+       }
+       ret = lttng_syscall_list_fops.open(NULL, syscall_list_file);
+       if (ret < 0)
+               goto open_error;
+       fd_install(file_fd, syscall_list_file);
+       if (file_fd < 0) {
+               ret = file_fd;
+               goto fd_error;
+       }
+       return file_fd;
+
+open_error:
+       fput(syscall_list_file);
+file_error:
+       put_unused_fd(file_fd);
+fd_error:
+       return ret;
+}