+++ /dev/null
-#ifndef __LIBCFS_TRACEFILE_H__
-#define __LIBCFS_TRACEFILE_H__
-
-#include <libcfs/libcfs.h>
-
-/* trace file lock routines */
-
-#define TRACEFILE_NAME_SIZE 1024
-extern char tracefile[TRACEFILE_NAME_SIZE];
-extern long long tracefile_size;
-
-int tracefile_init_arch(void);
-void tracefile_fini_arch(void);
-
-void tracefile_read_lock(void);
-void tracefile_read_unlock(void);
-void tracefile_write_lock(void);
-void tracefile_write_unlock(void);
-
-int tracefile_dump_all_pages(char *filename);
-void trace_debug_print(void);
-void trace_flush_pages(void);
-int trace_start_thread(void);
-void trace_stop_thread(void);
-int tracefile_init(int max_pages);
-void tracefile_exit(void);
-
-
-
-int trace_copyin_string(char *knl_buffer, int knl_buffer_nob,
- const char *usr_buffer, int usr_buffer_nob);
-int trace_copyout_string(char *usr_buffer, int usr_buffer_nob,
- const char *knl_str, char *append);
-int trace_allocate_string_buffer(char **str, int nob);
-void trace_free_string_buffer(char *str, int nob);
-int trace_dump_debug_buffer_usrstr(void *usr_str, int usr_str_nob);
-int trace_daemon_command(char *str);
-int trace_daemon_command_usrstr(void *usr_str, int usr_str_nob);
-int trace_set_debug_mb(int mb);
-int trace_set_debug_mb_usrstr(void *usr_str, int usr_str_nob);
-int trace_get_debug_mb(void);
-
-extern void libcfs_debug_dumplog_internal(void *arg);
-extern void libcfs_register_panic_notifier(void);
-extern void libcfs_unregister_panic_notifier(void);
-extern int libcfs_panic_in_progress;
-extern int trace_max_debug_mb(void);
-
-#define TCD_MAX_PAGES (5 << (20 - CFS_PAGE_SHIFT))
-#define TCD_STOCK_PAGES (TCD_MAX_PAGES)
-#define TRACEFILE_SIZE (500 << 20)
-
-#ifdef LUSTRE_TRACEFILE_PRIVATE
-
-/*
- * Private declare for tracefile
- */
-#define TCD_MAX_PAGES (5 << (20 - CFS_PAGE_SHIFT))
-#define TCD_STOCK_PAGES (TCD_MAX_PAGES)
-
-#define TRACEFILE_SIZE (500 << 20)
-
-/* Size of a buffer for sprinting console messages if we can't get a page
- * from system */
-#define TRACE_CONSOLE_BUFFER_SIZE 1024
-
-union trace_data_union {
- struct trace_cpu_data {
- /*
- * pages with trace records not yet processed by tracefiled.
- */
- struct list_head tcd_pages;
- /* number of pages on ->tcd_pages */
- unsigned long tcd_cur_pages;
-
- /*
- * pages with trace records already processed by
- * tracefiled. These pages are kept in memory, so that some
- * portion of log can be written in the event of LBUG. This
- * list is maintained in LRU order.
- *
- * Pages are moved to ->tcd_daemon_pages by tracefiled()
- * (put_pages_on_daemon_list()). LRU pages from this list are
- * discarded when list grows too large.
- */
- struct list_head tcd_daemon_pages;
- /* number of pages on ->tcd_daemon_pages */
- unsigned long tcd_cur_daemon_pages;
-
- /*
- * Maximal number of pages allowed on ->tcd_pages and
- * ->tcd_daemon_pages each.
- * Always TCD_MAX_PAGES * tcd_pages_factor / 100 in current
- * implementation.
- */
- unsigned long tcd_max_pages;
-
- /*
- * preallocated pages to write trace records into. Pages from
- * ->tcd_stock_pages are moved to ->tcd_pages by
- * portals_debug_msg().
- *
- * This list is necessary, because on some platforms it's
- * impossible to perform efficient atomic page allocation in a
- * non-blockable context.
- *
- * Such platforms fill ->tcd_stock_pages "on occasion", when
- * tracing code is entered in blockable context.
- *
- * trace_get_tage_try() tries to get a page from
- * ->tcd_stock_pages first and resorts to atomic page
- * allocation only if this queue is empty. ->tcd_stock_pages
- * is replenished when tracing code is entered in blocking
- * context (darwin-tracefile.c:trace_get_tcd()). We try to
- * maintain TCD_STOCK_PAGES (40 by default) pages in this
- * queue. Atomic allocation is only required if more than
- * TCD_STOCK_PAGES pagesful are consumed by trace records all
- * emitted in non-blocking contexts. Which is quite unlikely.
- */
- struct list_head tcd_stock_pages;
- /* number of pages on ->tcd_stock_pages */
- unsigned long tcd_cur_stock_pages;
-
- unsigned short tcd_shutting_down;
- unsigned short tcd_cpu;
- unsigned short tcd_type;
- /* The factors to share debug memory. */
- unsigned short tcd_pages_factor;
- } tcd;
- char __pad[L1_CACHE_ALIGN(sizeof(struct trace_cpu_data))];
-};
-
-#define TCD_MAX_TYPES 8
-extern union trace_data_union (*trace_data[TCD_MAX_TYPES])[NR_CPUS];
-
-#define tcd_for_each(tcd, i, j) \
- for (i = 0; trace_data[i] != NULL; i++) \
- for (j = 0, ((tcd) = &(*trace_data[i])[j].tcd); \
- j < num_possible_cpus(); j++, (tcd) = &(*trace_data[i])[j].tcd)
-
-#define tcd_for_each_type_lock(tcd, i) \
- for (i = 0; trace_data[i] && \
- (tcd = &(*trace_data[i])[smp_processor_id()].tcd) && \
- trace_lock_tcd(tcd); trace_unlock_tcd(tcd), i++)
-
-/* XXX nikita: this declaration is internal to tracefile.c and should probably
- * be moved there */
-struct page_collection {
- struct list_head pc_pages;
- /*
- * spin-lock protecting ->pc_pages. It is taken by smp_call_function()
- * call-back functions. XXX nikita: Which is horrible: all processors
- * receive NMI at the same time only to be serialized by this
- * lock. Probably ->pc_pages should be replaced with an array of
- * NR_CPUS elements accessed locklessly.
- */
- spinlock_t pc_lock;
- /*
- * if this flag is set, collect_pages() will spill both
- * ->tcd_daemon_pages and ->tcd_pages to the ->pc_pages. Otherwise,
- * only ->tcd_pages are spilled.
- */
- int pc_want_daemon_pages;
-};
-
-/* XXX nikita: this declaration is internal to tracefile.c and should probably
- * be moved there */
-struct tracefiled_ctl {
- struct completion tctl_start;
- struct completion tctl_stop;
- cfs_waitq_t tctl_waitq;
- pid_t tctl_pid;
- atomic_t tctl_shutdown;
-};
-
-/*
- * small data-structure for each page owned by tracefiled.
- */
-/* XXX nikita: this declaration is internal to tracefile.c and should probably
- * be moved there */
-struct trace_page {
- /*
- * page itself
- */
- cfs_page_t *page;
- /*
- * linkage into one of the lists in trace_data_union or
- * page_collection
- */
- struct list_head linkage;
- /*
- * number of bytes used within this page
- */
- unsigned int used;
- /*
- * cpu that owns this page
- */
- unsigned short cpu;
- /*
- * type(context) of this page
- */
- unsigned short type;
-};
-
-extern void set_ptldebug_header(struct ptldebug_header *header,
- int subsys, int mask, const int line,
- unsigned long stack);
-extern void print_to_console(struct ptldebug_header *hdr, int mask, const char *buf,
- int len, const char *file, const char *fn);
-
-extern struct trace_cpu_data *trace_get_tcd(void);
-extern void trace_put_tcd(struct trace_cpu_data *tcd);
-extern int trace_lock_tcd(struct trace_cpu_data *tcd);
-extern void trace_unlock_tcd(struct trace_cpu_data *tcd);
-extern char *trace_get_console_buffer(void);
-extern void trace_put_console_buffer(char *buffer);
-
-extern void trace_call_on_all_cpus(void (*fn)(void *arg), void *arg);
-
-int trace_refill_stock(struct trace_cpu_data *tcd, int gfp,
- struct list_head *stock);
-
-
-int tcd_owns_tage(struct trace_cpu_data *tcd, struct trace_page *tage);
-
-extern void trace_assertion_failed(const char *str, const char *fn,
- const char *file, int line);
-
-/* ASSERTION that is safe to use within the debug system */
-#define __LASSERT(cond) \
-({ \
- if (unlikely(!(cond))) { \
- trace_assertion_failed("ASSERTION("#cond") failed", \
- __FUNCTION__, __FILE__, __LINE__); \
- } \
-})
-
-#define __LASSERT_TAGE_INVARIANT(tage) \
-({ \
- __LASSERT(tage != NULL); \
- __LASSERT(tage->page != NULL); \
- __LASSERT(tage->used <= CFS_PAGE_SIZE); \
- __LASSERT(cfs_page_count(tage->page) > 0); \
-})
-
-#endif /* LUSTRE_TRACEFILE_PRIVATE */
-
-#endif /* __LIBCFS_TRACEFILE_H__ */
git://git.whamcloud.com / fs / lustre-release.git / blobdiff