lnet/libcfs/tracefile.h

   1 #ifndef __LIBCFS_TRACEFILE_H__
   2 #define __LIBCFS_TRACEFILE_H__
   3
   4 #include <libcfs/libcfs.h>
   5
   6 int tracefile_dump_all_pages(char *filename);
   7 void trace_debug_print(void);
   8 void trace_flush_pages(void);
   9 int trace_start_thread(void);
  10 void trace_stop_thread(void);
  11 int tracefile_init(void);
  12 void tracefile_exit(void);
  13 int trace_write_daemon_file(struct file *file, const char *buffer,
  14                             unsigned long count, void *data);
  15 int trace_read_daemon_file(char *page, char **start, off_t off, int count,
  16                            int *eof, void *data);
  17 int trace_write_debug_mb(struct file *file, const char *buffer,
  18                          unsigned long count, void *data);
  19 int trace_read_debug_mb(char *page, char **start, off_t off, int count,
  20                         int *eof, void *data);
  21 int trace_dk(struct file *file, const char *buffer, unsigned long count,
  22              void *data);
  23
  24 #ifdef LUSTRE_TRACEFILE_PRIVATE
  25 /*
  26  * Private declare for tracefile
  27  */
  28 #define TCD_MAX_PAGES (5 << (20 - PAGE_SHIFT))
  29
  30 #define TRACEFILE_SIZE (500 << 20)
  31
  32 union trace_data_union {
  33         struct trace_cpu_data {
  34                 struct list_head        tcd_pages;
  35                 unsigned long           tcd_cur_pages;
  36
  37                 struct list_head        tcd_daemon_pages;
  38                 unsigned long           tcd_cur_daemon_pages;
  39
  40                 unsigned long           tcd_max_pages;
  41                 int                     tcd_shutting_down;
  42         } tcd;
  43         char __pad[SMP_CACHE_BYTES];
  44 };
  45
  46 struct page_collection {
  47         struct list_head        pc_pages;
  48         spinlock_t              pc_lock;
  49         int                     pc_want_daemon_pages;
  50 };
  51
  52 struct tracefiled_ctl {
  53         struct completion       tctl_start;
  54         struct completion       tctl_stop;
  55         cfs_waitq_t             tctl_waitq;
  56         pid_t                   tctl_pid;
  57         atomic_t                tctl_shutdown;
  58 };
  59
  60 /*
  61  * small data-structure for each page owned by tracefiled.
  62  */
  63 struct trace_page {
  64         /*
  65          * page itself
  66          */
  67         cfs_page_t      *page;
  68         /*
  69          * linkage into one of the lists in trace_data_union or
  70          * page_collection
  71          */
  72         struct list_head linkage;
  73         /*
  74          * number of bytes used within this page
  75          */
  76         unsigned int     used;
  77         /*
  78          * cpu that owns this page
  79          */
  80         int              cpu;
  81 };
  82
  83 extern void set_ptldebug_header(struct ptldebug_header *header,
  84                            int subsys, int mask, const int line,
  85                            unsigned long stack);
  86 extern void print_to_console(struct ptldebug_header *hdr, int mask,
  87                              char *buf, int len, char *file, const char *fn);
  88 extern struct trace_cpu_data * __trace_get_tcd (unsigned long *flags);
  89 extern void __trace_put_tcd (struct trace_cpu_data *tcd, unsigned long flags);
  90
  91 #define trace_get_tcd(f)        __trace_get_tcd(&(f))
  92 #define trace_put_tcd(t, f)     __trace_put_tcd(t, f)
  93
  94 #endif  /* LUSTRE_TRACEFILE_PRIVATE */
  95
  96 #endif /* __PORTALS_TRACEFILE_H */