mirror of
https://git.proxmox.com/git/mirror_zfs.git
synced 2026-05-22 10:37:35 +03:00
First commit of lustre style internal debug support. These
changes bring over everything lustre had for debugging with two exceptions. I dropped by the debug daemon and upcalls just because it made things a little easier. They can be readded easily enough if we feel they are needed. Everything compiles and seems to work on first inspection but I suspect there are a handful of issues still lingering which I'll be sorting out right away. I just wanted to get all these changes commited and safe. I'm getting a little paranoid about losing them. git-svn-id: https://outreach.scidac.gov/svn/spl/trunk@75 7e1ea52c-4ff2-0310-8f11-9dd32ca42a1c
This commit is contained in:
behlendo
+310
-3
@@ -1,11 +1,318 @@
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#ifndef _SPL_DEBUG_H
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#define _SPL_DEBUG_H
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#include <linux/sched.h> /* THREAD_SIZE */
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#include <linux/proc_fs.h>
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extern unsigned long spl_debug_mask;
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extern unsigned long spl_debug_subsys;
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void __dprintf(const char *file, const char *func, int line, const char *fmt, ...);
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void spl_set_debug_mask(unsigned long mask);
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void spl_set_debug_subsys(unsigned long mask);
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#define S_UNDEFINED 0x00000001
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#define S_ATOMIC 0x00000002
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#define S_KOBJ 0x00000004
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#define S_VNODE 0x00000008
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#define S_TIME 0x00000010
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#define S_RWLOCK 0x00000020
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#define S_THREAD 0x00000040
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#define S_CONDVAR 0x00000080
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#define S_MUTEX 0x00000100
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#define S_RNG 0x00000200
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#define S_TASKQ 0x00000400
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#define S_KMEM 0x00000800
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#define S_DEBUG 0x00001000
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#define S_GENERIC 0x00002000
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#define S_PROC 0x00004000
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#define D_TRACE 0x00000001
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#define D_INFO 0x00000002
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#define D_WARNING 0x00000004
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#define D_ERROR 0x00000008
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#define D_EMERG 0x00000010
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#define D_CONSOLE 0x00000020
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#define D_IOCTL 0x00000040
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#define D_DPRINTF 0x00000080
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#define D_OTHER 0x00000100
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#define D_CANTMASK (D_ERROR | D_EMERG | D_WARNING | D_CONSOLE)
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#define DEBUG_SUBSYSTEM S_UNDEFINED
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int debug_init(void);
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void debug_fini(void);
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int spl_debug_mask2str(char *str, int size, unsigned long mask, int is_subsys);
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int spl_debug_str2mask(unsigned long *mask, const char *str, int is_subsys);
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extern unsigned long spl_debug_subsys;
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extern unsigned long spl_debug_mask;
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extern unsigned long spl_debug_printk;
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extern int spl_debug_mb;
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extern unsigned int spl_debug_binary;
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extern unsigned int spl_debug_catastrophe;
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extern unsigned int spl_debug_panic_on_bug;
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extern char spl_debug_file_path[PATH_MAX];
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extern unsigned int spl_console_ratelimit;
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extern long spl_console_max_delay;
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extern long spl_console_min_delay;
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extern unsigned int spl_console_backoff;
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extern unsigned int spl_debug_stack;
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#define TCD_MAX_PAGES (5 << (20 - PAGE_SHIFT))
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#define TCD_STOCK_PAGES (TCD_MAX_PAGES)
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#define TRACE_CONSOLE_BUFFER_SIZE 1024
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#define SPL_DEFAULT_MAX_DELAY (600 * HZ)
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#define SPL_DEFAULT_MIN_DELAY ((HZ + 1) / 2)
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#define SPL_DEFAULT_BACKOFF 2
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typedef struct {
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unsigned long cdls_next;
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int cdls_count;
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long cdls_delay;
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} spl_debug_limit_state_t;
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/* Three trace data types */
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typedef enum {
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TCD_TYPE_PROC,
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TCD_TYPE_SOFTIRQ,
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TCD_TYPE_IRQ,
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TCD_TYPE_MAX
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} tcd_type_t;
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union trace_data_union {
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struct trace_cpu_data {
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/* pages with trace records not yet processed by tracefiled */
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struct list_head tcd_pages;
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/* number of pages on ->tcd_pages */
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unsigned long tcd_cur_pages;
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/* Max number of pages allowed on ->tcd_pages */
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unsigned long tcd_max_pages;
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/*
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* preallocated pages to write trace records into. Pages from
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* ->tcd_stock_pages are moved to ->tcd_pages by spl_debug_msg().
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*
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* This list is necessary, because on some platforms it's
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* impossible to perform efficient atomic page allocation in a
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* non-blockable context.
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*
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* Such platforms fill ->tcd_stock_pages "on occasion", when
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* tracing code is entered in blockable context.
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*
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* trace_get_tage_try() tries to get a page from
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* ->tcd_stock_pages first and resorts to atomic page
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* allocation only if this queue is empty. ->tcd_stock_pages
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* is replenished when tracing code is entered in blocking
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* context (darwin-tracefile.c:trace_get_tcd()). We try to
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* maintain TCD_STOCK_PAGES (40 by default) pages in this
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* queue. Atomic allocation is only required if more than
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* TCD_STOCK_PAGES pagesful are consumed by trace records all
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* emitted in non-blocking contexts. Which is quite unlikely.
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*/
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struct list_head tcd_stock_pages;
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/* number of pages on ->tcd_stock_pages */
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unsigned long tcd_cur_stock_pages;
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unsigned short tcd_shutting_down;
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unsigned short tcd_cpu;
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unsigned short tcd_type;
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/* The factors to share debug memory. */
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unsigned short tcd_pages_factor;
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} tcd;
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char __pad[L1_CACHE_ALIGN(sizeof(struct trace_cpu_data))];
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};
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extern union trace_data_union (*trace_data[TCD_TYPE_MAX])[NR_CPUS];
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#define tcd_for_each(tcd, i, j) \
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for (i = 0; trace_data[i] != NULL; i++) \
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for (j = 0, ((tcd) = &(*trace_data[i])[j].tcd); \
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j < num_possible_cpus(); j++, (tcd) = &(*trace_data[i])[j].tcd)
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#define tcd_for_each_type_lock(tcd, i) \
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for (i = 0; trace_data[i] && \
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(tcd = &(*trace_data[i])[smp_processor_id()].tcd) && \
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trace_lock_tcd(tcd); trace_unlock_tcd(tcd), i++)
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struct trace_page {
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struct page * page; /* page itself */
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struct list_head linkage; /* Used by lists in trace_data_union */
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unsigned int used; /* number of bytes used within this page */
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unsigned short cpu; /* cpu that owns this page */
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unsigned short type; /* type(context) of this page */
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};
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struct page_collection {
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struct list_head pc_pages;
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spinlock_t pc_lock;
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int pc_want_daemon_pages;
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};
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/* ASSERTION that is safe to use within the debug system */
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#define __ASSERT(cond) \
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do { \
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if (unlikely(!(cond))) { \
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printk(KERN_ERR "ASSERTION("#cond") failed"); \
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BUG(); \
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} \
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} while (0)
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#define __ASSERT_TAGE_INVARIANT(tage) \
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do { \
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__ASSERT(tage != NULL); \
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__ASSERT(tage->page != NULL); \
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__ASSERT(tage->used <= PAGE_SIZE); \
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__ASSERT(page_count(tage->page) > 0); \
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} while(0)
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/* ASSERTION that will debug log used outside the debug sysytem */
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#define ASSERT(cond) \
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do { \
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if (unlikely(!(cond))) { \
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spl_debug_msg(NULL, DEBUG_SUBSYSTEM, D_EMERG, \
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__FILE__, __FUNCTION__, __LINE__, \
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"ASSERTION(" #cond ") failed\n"); \
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spl_debug_bug(__FILE__, __FUNCTION__, __LINE__); \
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} \
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} while (0)
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#define ASSERTF(cond, fmt, a...) \
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do { \
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if (unlikely(!(cond))) { \
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spl_debug_msg(NULL, DEBUG_SUBSYSTEM, D_EMERG, \
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__FILE__, __FUNCTION__, __LINE__, \
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"ASSERTION(" #cond ") failed:" fmt, \
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## a); \
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spl_debug_bug(__FILE__, __FUNCTION__, __LINE__) \
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} \
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} while (0)
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#define VERIFY3_IMPL(LEFT, OP, RIGHT, TYPE, FMT, CAST) \
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do { \
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const TYPE __left = (TYPE)(LEFT); \
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const TYPE __right = (TYPE)(RIGHT); \
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if (!(__left OP __right)) { \
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spl_debug_msg(NULL, DEBUG_SUBSYSTEM, D_EMERG, \
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__FILE__, __FUNCTION__, __LINE__, \
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"VERIFY3(" FMT " " #OP " " FMT ")\n", \
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CAST __left, CAST __right); \
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spl_debug_bug(__FILE__, __FUNCTION__, __LINE__) \
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} \
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} while (0)
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#define VERIFY3S(x,y,z) VERIFY3_IMPL(x, y, z, int64_t, "%ld", (long))
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#define VERIFY3U(x,y,z) VERIFY3_IMPL(x, y, z, uint64_t, "%lu", (unsigned long))
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#define VERIFY3P(x,y,z) VERIFY3_IMPL(x, y, z, uintptr_t, "%p", (void *))
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#define ASSERT3S(x,y,z) VERIFY3S(x, y, z)
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#define ASSERT3U(x,y,z) VERIFY3U(x, y, z)
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#define ASSERT3P(x,y,z) VERIFY3P(x, y, z)
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#define VERIFY(x) ASSERT(x)
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#define SBUG() spl_debug_bug(__FILE__, __FUNCTION__, __LINE__);
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#define spl_debug_msg(cdls, subsys, mask, file, fn, line, format, a...) \
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spl_debug_vmsg(cdls, subsys, mask, file, fn, \
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line, NULL, NULL, format, ##a)
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#ifdef __ia64__
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#define CDEBUG_STACK() (THREAD_SIZE - \
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((unsigned long)__builtin_dwarf_cfa() & \
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(THREAD_SIZE - 1)))
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#else
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#define CDEBUG_STACK() (THREAD_SIZE - \
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((unsigned long)__builtin_frame_address(0) & \
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(THREAD_SIZE - 1)))
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# endif /* __ia64__ */
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#define __CHECK_STACK(file, func, line) \
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do { \
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unsigned long _stack = CDEBUG_STACK(); \
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\
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if (_stack > (3*THREAD_SIZE/4) && _stack > spl_debug_stack) { \
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spl_debug_stack = _stack; \
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spl_debug_msg(NULL, D_TRACE, D_WARNING, \
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file, func, line, \
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"Exceeded maximum safe stack " \
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"%lu/%lu\n", _stack, THREAD_SIZE); \
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__ASSERT(0); \
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} \
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} while (0)
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#define CHECK_STACK()__CHECK_STACK(__FILE__, __func__, __LINE__)
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#define __CDEBUG(cdls, subsys, mask, format, a...) \
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do { \
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CHECK_STACK(); \
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\
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if (((mask) & D_CANTMASK) != 0 || \
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((spl_debug_mask & (mask)) != 0 && \
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(spl_debug_subsys & (subsys)) != 0)) \
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spl_debug_msg(cdls, subsys, mask, \
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__FILE__, __FUNCTION__, __LINE__, \
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format, ## a); \
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} while (0)
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#define CDEBUG(mask, format, a...) \
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__CDEBUG(NULL, DEBUG_SUBSYSTEM, mask, format, ## a)
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#define __CDEBUG_LIMIT(subsys, mask, format, a...) \
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do { \
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static spl_debug_limit_state_t cdls; \
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\
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__CDEBUG(&cdls, subsys, mask, format, ## a); \
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} while (0)
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#define CDEBUG_LIMIT(mask, format, a...) \
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__CDEBUG_LIMIT(DEBUG_SUBSYSTEM, mask, format, ## a)
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#define dprintf(fmt, a...) CDEBUG_LIMIT(D_INFO, fmt, ## a)
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#define CWARN(fmt, a...) CDEBUG_LIMIT(D_WARNING, fmt, ## a)
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#define CERROR(fmt, a...) CDEBUG_LIMIT(D_ERROR, fmt, ## a)
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#define CEMERG(fmt, a...) CDEBUG_LIMIT(D_EMERG, fmt, ## a)
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#define CONSOLE(mask, fmt, a...) CDEBUG(D_CONSOLE | (mask), fmt, ## a)
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#define GOTO(label, rc) \
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do { \
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long GOTO__ret = (long)(rc); \
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CDEBUG(D_TRACE,"Process leaving via %s (rc=%lu : %ld : %lx)\n", \
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#label, (unsigned long)GOTO__ret, (signed long)GOTO__ret,\
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(signed long)GOTO__ret); \
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goto label; \
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} while (0)
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#define RETURN(rc) \
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do { \
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typeof(rc) RETURN__ret = (rc); \
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CDEBUG(D_TRACE, "Process leaving (rc=%lu : %ld : %lx)\n", \
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(long)RETURN__ret, (long)RETURN__ret, (long)RETURN__ret);\
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return RETURN__ret; \
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} while (0)
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#define ENTRY \
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do { \
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CDEBUG(D_TRACE, "Process entered\n"); \
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} while (0)
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#define EXIT \
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do { \
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CDEBUG(D_TRACE, "Process leaving\n"); \
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} while(0)
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extern int spl_debug_vmsg(spl_debug_limit_state_t *cdls, int subsys, int mask,
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const char *file, const char *fn, const int line,
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const char *format1, va_list args, const char *format2, ...);
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extern unsigned long spl_debug_set_mask(unsigned long mask);
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extern unsigned long spl_debug_get_mask(void);
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extern unsigned long spl_debug_set_subsys(unsigned long mask);
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extern unsigned long spl_debug_get_subsys(void);
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extern int spl_debug_set_mb(int mb);
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extern int spl_debug_get_mb(void);
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extern int spl_debug_dumplog(void);
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extern void spl_debug_dumpstack(struct task_struct *tsk);
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extern void spl_debug_bug(char *file, const char *func, const int line);
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extern int spl_debug_clear_buffer(void);
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extern int spl_debug_mark_buffer(char *text);
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#endif /* SPL_DEBUG_H */
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@@ -0,0 +1,9 @@
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#ifndef _SPL_PROC_H
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#define _SPL_PROC_H
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#include <linux/proc_fs.h>
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int proc_init(void);
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void proc_fini(void);
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#endif /* SPL_PROC_H */
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+4
-22
@@ -6,6 +6,7 @@ extern "C" {
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#endif
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#include <linux/module.h>
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#include <sys/debug.h>
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#include <sys/varargs.h>
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#include <sys/zone.h>
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#include <sys/signal.h>
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@@ -73,26 +74,6 @@ extern "C" {
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#define bzero(ptr,size) memset(ptr,0,size)
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#define bcopy(src,dest,size) memcpy(dest,src,size)
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#define bcmp(src,dest,size) memcmp((src), (dest), (size_t)(size))
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#define ASSERT(x) BUG_ON(!(x))
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#define VERIFY(x) ASSERT(x)
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#define VERIFY3_IMPL(LEFT, OP, RIGHT, TYPE, FMT, CAST) do { \
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const TYPE __left = (TYPE)(LEFT); \
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const TYPE __right = (TYPE)(RIGHT); \
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if (!(__left OP __right)) { \
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printk("spl: Error VERIFY3(" FMT " " #OP " " FMT ")\n", \
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CAST __left, CAST __right); \
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BUG(); \
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} \
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} while (0)
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#define VERIFY3S(x, y, z) VERIFY3_IMPL(x, y, z, int64_t, "%ld", (long))
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#define VERIFY3U(x, y, z) VERIFY3_IMPL(x, y, z, uint64_t, "%lu", (unsigned long))
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#define VERIFY3P(x, y, z) VERIFY3_IMPL(x, y, z, uintptr_t, "%p", (void *))
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#define ASSERT3S(x, y, z) VERIFY3S(x, y, z)
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#define ASSERT3U(x, y, z) VERIFY3U(x, y, z)
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#define ASSERT3P(x, y, z) VERIFY3P(x, y, z)
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/* Dtrace probes do not exist in the linux kernel */
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@@ -117,12 +98,13 @@ extern "C" {
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#define DTRACE_PROBE4(a, b, c, d, e, f, g, h, i) ((void)0)
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/* Missing globals */
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extern unsigned long spl_hostid;
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extern char spl_hw_serial[11];
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extern int p0;
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extern char hw_serial[11];
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/* Missing misc functions */
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extern int highbit(unsigned long i);
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extern int ddi_strtoul(const char *hw_serial, char **nptr,
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extern int ddi_strtoul(const char *str, char **nptr,
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int base, unsigned long *result);
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#define makedevice(maj,min) makedev(maj,min)
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