2 #define DEBUG_SUBSYSTEM S_LNET
3 #define LUSTRE_TRACEFILE_PRIVATE
4 #include <libcfs/libcfs.h>
5 #include <libcfs/kp30.h>
9 * We can't support smp tracefile currently.
10 * Everything is put on one cpu.
13 #define M_TCD_MAX_PAGES (128 * 1280)
15 static long max_permit_mb = (64 * 1024);
17 spinlock_t trace_cpu_serializer;
20 * thread currently executing tracefile code or NULL if none does. Used to
21 * detect recursive calls to libcfs_debug_msg().
23 static thread_t trace_owner = NULL;
25 extern int get_preemption_level(void);
26 extern atomic_t tage_allocated;
28 struct rw_semaphore tracefile_sem;
30 int tracefile_init_arch() {
31 init_rwsem(&tracefile_sem);
32 #error "Todo: initialise per-cpu console buffers"
36 void tracefile_fini_arch() {
39 void tracefile_read_lock() {
40 down_read(&tracefile_sem);
43 void tracefile_read_unlock() {
44 up_read(&tracefile_sem);
47 void tracefile_write_lock() {
48 down_write(&tracefile_sem);
51 void tracefile_write_unlock() {
52 up_write(&tracefile_sem);
55 char *trace_get_console_buffer(void)
57 #error "todo: return a per-cpu/interrupt console buffer and disable pre-emption"
60 void trace_put_console_buffer(char *buffer)
62 #error "todo: re-enable pre-emption"
65 struct trace_cpu_data *trace_get_tcd(void)
67 struct trace_cpu_data *tcd;
69 struct list_head pages;
72 * XXX nikita: do NOT call libcfs_debug_msg() (CDEBUG/ENTRY/EXIT)
73 * from here: this will lead to infinite recursion.
77 * debugging check for recursive call to libcfs_debug_msg()
79 if (trace_owner == current_thread()) {
83 printk(KERN_EMERG "recursive call to %s", __FUNCTION__);
85 * "The death of God left the angels in a strange position."
89 tcd = &trace_data[0].tcd;
90 CFS_INIT_LIST_HEAD(&pages);
91 if (get_preemption_level() == 0)
92 nr_pages = trace_refill_stock(tcd, CFS_ALLOC_STD, &pages);
95 spin_lock(&trace_cpu_serializer);
96 trace_owner = current_thread();
97 tcd->tcd_cur_stock_pages += nr_pages;
98 list_splice(&pages, &tcd->tcd_stock_pages);
102 extern void raw_page_death_row_clean(void);
104 void __trace_put_tcd(struct trace_cpu_data *tcd)
107 * XXX nikita: do NOT call libcfs_debug_msg() (CDEBUG/ENTRY/EXIT)
108 * from here: this will lead to infinite recursion.
110 LASSERT(trace_owner == current_thread());
112 spin_unlock(&trace_cpu_serializer);
113 if (get_preemption_level() == 0)
114 /* purge all pending pages */
115 raw_page_death_row_clean();
118 int tcd_owns_tage(struct trace_cpu_data *tcd, struct trace_page *tage)
121 * XXX nikita: do NOT call libcfs_debug_msg() (CDEBUG/ENTRY/EXIT)
122 * from here: this will lead to infinite recursion.
124 /* XNU has global tcd, and all pages are owned by it */
129 set_ptldebug_header(struct ptldebug_header *header, int subsys, int mask,
130 const int line, unsigned long stack)
135 * XXX nikita: do NOT call libcfs_debug_msg() (CDEBUG/ENTRY/EXIT)
136 * from here: this will lead to infinite recursion.
138 do_gettimeofday(&tv);
139 header->ph_subsys = subsys;
140 header->ph_mask = mask;
141 header->ph_cpu_id = smp_processor_id();
142 header->ph_sec = (__u32)tv.tv_sec;
143 header->ph_usec = tv.tv_usec;
144 header->ph_stack = stack;
145 header->ph_pid = cfs_curproc_pid();
146 header->ph_line_num = line;
147 header->ph_extern_pid = (__u32)current_thread();
150 void print_to_console(struct ptldebug_header *hdr, int mask, const char *buf,
151 int len, const char *file, const char *fn)
153 char *prefix = "Lustre", *ptype = KERN_INFO;
156 * XXX nikita: do NOT call libcfs_debug_msg() (CDEBUG/ENTRY/EXIT)
157 * from here: this will lead to infinite recursion.
159 if ((mask & D_EMERG) != 0) {
160 prefix = "LustreError";
162 } else if ((mask & D_ERROR) != 0) {
163 prefix = "LustreError";
165 } else if ((mask & D_WARNING) != 0) {
167 ptype = KERN_WARNING;
168 } else if ((mask & libcfs_printk) != 0 || (mask & D_CONSOLE)) {
173 if ((mask & D_CONSOLE) != 0) {
174 printk("%s%s: %.*s", ptype, prefix, len, buf);
176 printk("%s%s: %d:%d:(%s:%d:%s()) %*s",
177 ptype, prefix, hdr->ph_pid, hdr->ph_extern_pid,
178 file, hdr->ph_line_num, fn, len, buf);
182 int trace_max_debug_mb(void)
184 return max_permit_mb;
188 trace_call_on_all_cpus(void (*fn)(void *arg), void *arg)