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)
14 extern union trace_data_union trace_data[NR_CPUS];
16 static long max_permit_mb = (64 * 1024);
18 spinlock_t trace_cpu_serializer;
21 * thread currently executing tracefile code or NULL if none does. Used to
22 * detect recursive calls to libcfs_debug_msg().
24 static thread_t trace_owner = NULL;
26 extern int get_preemption_level(void);
27 extern atomic_t tage_allocated;
29 struct rw_semaphore tracefile_sem;
31 int tracefile_init_arch() {
32 init_rwsem(&tracefile_sem);
33 #error "Todo: initialise per-cpu console buffers"
37 void tracefile_fini_arch() {
40 void tracefile_read_lock() {
41 down_read(&tracefile_sem);
44 void tracefile_read_unlock() {
45 up_read(&tracefile_sem);
48 void tracefile_write_lock() {
49 down_write(&tracefile_sem);
52 void tracefile_write_unlock() {
53 up_write(&tracefile_sem);
56 char *trace_get_console_buffer(void)
58 #error "todo: return a per-cpu/interrupt console buffer and disable pre-emption"
61 void trace_put_console_buffer(char *buffer)
63 #error "todo: re-enable pre-emption"
66 struct trace_cpu_data *trace_get_tcd(void)
68 struct trace_cpu_data *tcd;
70 struct list_head pages;
73 * XXX nikita: do NOT call libcfs_debug_msg() (CDEBUG/ENTRY/EXIT)
74 * from here: this will lead to infinite recursion.
78 * debugging check for recursive call to libcfs_debug_msg()
80 if (trace_owner == current_thread()) {
84 printk(KERN_EMERG "recursive call to %s", __FUNCTION__);
86 * "The death of God left the angels in a strange position."
90 tcd = &trace_data[0].tcd;
91 CFS_INIT_LIST_HEAD(&pages);
92 if (get_preemption_level() == 0)
93 nr_pages = trace_refill_stock(tcd, CFS_ALLOC_STD, &pages);
96 spin_lock(&trace_cpu_serializer);
97 trace_owner = current_thread();
98 tcd->tcd_cur_stock_pages += nr_pages;
99 list_splice(&pages, &tcd->tcd_stock_pages);
103 extern void raw_page_death_row_clean(void);
105 void __trace_put_tcd(struct trace_cpu_data *tcd)
108 * XXX nikita: do NOT call libcfs_debug_msg() (CDEBUG/ENTRY/EXIT)
109 * from here: this will lead to infinite recursion.
111 LASSERT(trace_owner == current_thread());
113 spin_unlock(&trace_cpu_serializer);
114 if (get_preemption_level() == 0)
115 /* purge all pending pages */
116 raw_page_death_row_clean();
119 int tcd_owns_tage(struct trace_cpu_data *tcd, struct trace_page *tage)
122 * XXX nikita: do NOT call libcfs_debug_msg() (CDEBUG/ENTRY/EXIT)
123 * from here: this will lead to infinite recursion.
125 /* XNU has global tcd, and all pages are owned by it */
130 set_ptldebug_header(struct ptldebug_header *header, int subsys, int mask,
131 const int line, unsigned long stack)
136 * XXX nikita: do NOT call libcfs_debug_msg() (CDEBUG/ENTRY/EXIT)
137 * from here: this will lead to infinite recursion.
139 do_gettimeofday(&tv);
140 header->ph_subsys = subsys;
141 header->ph_mask = mask;
142 header->ph_cpu_id = smp_processor_id();
143 header->ph_sec = (__u32)tv.tv_sec;
144 header->ph_usec = tv.tv_usec;
145 header->ph_stack = stack;
146 header->ph_pid = cfs_curproc_pid();
147 header->ph_line_num = line;
148 header->ph_extern_pid = (__u32)current_thread();
151 void print_to_console(struct ptldebug_header *hdr, int mask, const char *buf,
152 int len, const char *file, const char *fn)
154 char *prefix = "Lustre", *ptype = KERN_INFO;
157 * XXX nikita: do NOT call libcfs_debug_msg() (CDEBUG/ENTRY/EXIT)
158 * from here: this will lead to infinite recursion.
160 if ((mask & D_EMERG) != 0) {
161 prefix = "LustreError";
163 } else if ((mask & D_ERROR) != 0) {
164 prefix = "LustreError";
166 } else if ((mask & D_WARNING) != 0) {
168 ptype = KERN_WARNING;
169 } else if ((mask & libcfs_printk) != 0 || (mask & D_CONSOLE)) {
174 if ((mask & D_CONSOLE) != 0) {
175 printk("%s%s: %.*s", ptype, prefix, len, buf);
177 printk("%s%s: %d:%d:(%s:%d:%s()) %*s",
178 ptype, prefix, hdr->ph_pid, hdr->ph_extern_pid,
179 file, hdr->ph_line_num, fn, len, buf);
183 int trace_max_debug_mb(void)
185 return max_permit_mb;
189 trace_call_on_all_cpus(void (*fn)(void *arg), void *arg)