mirror of
https://git.proxmox.com/git/mirror_zfs.git
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Add some crude debugging support. It leaves alot to be
desired, but it should allow more easy kernel debugging for now. git-svn-id: https://outreach.scidac.gov/svn/spl/trunk@59 7e1ea52c-4ff2-0310-8f11-9dd32ca42a1c
This commit is contained in:
behlendo
parent
e487ee08fb
commit
8d0f1ee907
@ -1,4 +1,11 @@
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#ifndef _SPL_DEBUG_H
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#define _SPL_DEBUG_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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#endif /* SPL_DEBUG_H */
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@ -35,14 +35,14 @@ extern int kmem_warning_flag;
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\
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/* Marked unlikely because we should never be doing this */ \
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if (unlikely((size) > (PAGE_SIZE * 2)) && kmem_warning_flag) \
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printk("Warning: kmem_alloc(%d, 0x%x) large alloc at %s:%d " \
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printk("spl: Warning kmem_alloc(%d, 0x%x) large alloc at %s:%d " \
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"(%ld/%ld)\n", (int)(size), (int)(flags), \
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__FILE__, __LINE__, \
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atomic64_read(&kmem_alloc_used), kmem_alloc_max); \
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\
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_ptr_ = (void *)allocator((size), (flags)); \
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if (_ptr_ == NULL) { \
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printk("Warning: kmem_alloc(%d, 0x%x) failed at %s:%d " \
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printk("spl: Warning kmem_alloc(%d, 0x%x) failed at %s:%d " \
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"(%ld/%ld)\n", (int)(size), (int)(flags), \
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__FILE__, __LINE__, \
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atomic64_read(&kmem_alloc_used), kmem_alloc_max); \
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@ -73,7 +73,7 @@ extern int kmem_warning_flag;
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\
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_ptr_ = (void *)vmalloc((size)); \
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if (_ptr_ == NULL) { \
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printk("Warning: vmem_alloc(%d, 0x%x) failed at %s:%d " \
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printk("spl: Warning vmem_alloc(%d, 0x%x) failed at %s:%d " \
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"(%ld/%ld)\n", (int)(size), (int)(flags), \
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__FILE__, __LINE__, \
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atomic64_read(&vmem_alloc_used), vmem_alloc_max); \
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@ -236,7 +236,7 @@ rw_tryupgrade(krwlock_t *rwlp)
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* lock. If there is, then we know we should
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* not try to upgrade the lock */
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if (!list_empty(&rwlp->rw_sem.wait_list)) {
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printk(KERN_WARNING "There are threads waiting\n");
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printk("spl: Warning There are threads waiting\n");
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spin_unlock(&rwlp->rw_sem.wait_lock);
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return 0;
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}
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@ -80,7 +80,7 @@ extern "C" {
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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("Failed VERIFY3(" FMT " " #OP " " FMT ")\n", \
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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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@ -2,11 +2,24 @@
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#include <sys/vmsystm.h>
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#include <sys/vnode.h>
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#include <sys/kmem.h>
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#include <sys/debug.h>
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#include <linux/proc_fs.h>
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#include "config.h"
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/*
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* Generic support
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*/
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static char spl_debug_buffer[MAXMSGLEN];
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static spinlock_t spl_debug_lock = SPIN_LOCK_UNLOCKED;
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unsigned long spl_debug_mask = 0;
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unsigned long spl_debug_subsys = 0xff;
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EXPORT_SYMBOL(spl_debug_mask);
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EXPORT_SYMBOL(spl_debug_subsys);
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static struct proc_dir_entry *spl_proc_root = NULL;
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static struct proc_dir_entry *spl_proc_debug_mask = NULL;
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static struct proc_dir_entry *spl_proc_debug_subsys = NULL;
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int p0 = 0;
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EXPORT_SYMBOL(p0);
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@ -17,6 +30,7 @@ EXPORT_SYMBOL(hw_serial);
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vmem_t *zio_alloc_arena = NULL;
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EXPORT_SYMBOL(zio_alloc_arena);
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int
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highbit(unsigned long i)
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{
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@ -56,27 +70,221 @@ ddi_strtoul(const char *str, char **nptr, int base, unsigned long *result)
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}
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EXPORT_SYMBOL(ddi_strtoul);
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static int __init spl_init(void)
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/* XXX: Not the most efficient debug function ever. This should be re-done
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* as an internal per-cpu in-memory debug log accessable via /proc/. Not as
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* a shared global buffer everything gets serialize though. That said I'll
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* worry about performance considerations once I've dealt with correctness.
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*/
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void
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__dprintf(const char *file, const char *func, int line, const char *fmt, ...)
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{
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char *sfp, *start, *ptr;
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struct timeval tv;
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va_list ap;
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start = ptr = spl_debug_buffer;
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sfp = strrchr(file, '/');
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do_gettimeofday(&tv);
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spin_lock(&spl_debug_lock);
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ptr += snprintf(ptr, MAXMSGLEN - 1,
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"spl: %lu.%06lu:%d:%u:%s:%d:%s(): ",
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tv.tv_sec, tv.tv_usec, current->pid,
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smp_processor_id(),
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sfp == NULL ? file : sfp + 1,
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line, func);
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va_start(ap, fmt);
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ptr += vsnprintf(ptr, MAXMSGLEN - (ptr - start) - 1, fmt, ap);
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va_end(ap);
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printk("%s", start);
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spin_unlock(&spl_debug_lock);
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}
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EXPORT_SYMBOL(__dprintf);
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static int
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spl_proc_rd_generic_ul(char *page, char **start, off_t off,
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int count, int *eof, unsigned long val)
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{
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int rc;
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if ((rc = kmem_init()))
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return rc;
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*start = page;
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*eof = 1;
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if ((rc = vn_init()))
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return rc;
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if (off || count > PAGE_SIZE)
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return 0;
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strcpy(hw_serial, "007f0100"); /* loopback */
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printk(KERN_INFO "spl: Loaded Solaris Porting Layer v%s\n", VERSION);
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spin_lock(&spl_debug_lock);
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rc = snprintf(page, PAGE_SIZE, "0x%lx\n", val);
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spin_unlock(&spl_debug_lock);
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return rc;
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}
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static int
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spl_proc_rd_debug_mask(char *page, char **start, off_t off,
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int count, int *eof, void *data)
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{
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return spl_proc_rd_generic_ul(page, start, off, count,
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eof, spl_debug_mask);
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}
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static int
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spl_proc_rd_debug_subsys(char *page, char **start, off_t off,
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int count, int *eof, void *data)
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{
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return spl_proc_rd_generic_ul(page, start, off, count,
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eof, spl_debug_subsys);
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}
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static int
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spl_proc_wr_generic_ul(const char *ubuf, unsigned long count,
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unsigned long *val, int base)
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{
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char *end, kbuf[32];
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if (count >= sizeof(kbuf))
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return -EOVERFLOW;
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if (copy_from_user(kbuf, ubuf, count))
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return -EFAULT;
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kbuf[count] = '\0';
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*val = (int)simple_strtoul(kbuf, &end, base);
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if (kbuf == end)
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return -EINVAL;
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return 0;
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}
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static int
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spl_proc_wr_debug_mask(struct file *file, const char *ubuf,
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unsigned long count, void *data, int mode)
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{
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unsigned long val;
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int rc;
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rc = spl_proc_wr_generic_ul(ubuf, count, &val, 16);
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if (rc)
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return rc;
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spin_lock(&spl_debug_lock);
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spl_debug_mask = val;
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spin_unlock(&spl_debug_lock);
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return count;
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}
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static int
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spl_proc_wr_debug_subsys(struct file *file, const char *ubuf,
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unsigned long count, void *data, int mode)
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{
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unsigned long val;
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int rc;
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rc = spl_proc_wr_generic_ul(ubuf, count, &val, 16);
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if (rc)
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return rc;
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spin_lock(&spl_debug_lock);
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spl_debug_subsys = val;
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spin_unlock(&spl_debug_lock);
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return count;
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}
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static struct proc_dir_entry *
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spl_register_proc_entry(const char *name, mode_t mode,
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struct proc_dir_entry *parent, void *data,
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void *read_proc, void *write_proc)
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{
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struct proc_dir_entry *entry;
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entry = create_proc_entry(name, mode, parent);
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if (!entry)
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return ERR_PTR(-EINVAL);
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entry->data = data;
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entry->read_proc = read_proc;
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entry->write_proc = write_proc;
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return entry;
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} /* register_proc_entry() */
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void spl_set_debug_mask(unsigned long mask) {
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spin_lock(&spl_debug_lock);
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spl_debug_mask = mask;
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spin_unlock(&spl_debug_lock);
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}
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EXPORT_SYMBOL(spl_set_debug_mask);
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void spl_set_debug_subsys(unsigned long mask) {
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spin_lock(&spl_debug_lock);
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spl_debug_subsys = mask;
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spin_unlock(&spl_debug_lock);
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}
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EXPORT_SYMBOL(spl_set_debug_subsys);
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static int __init spl_init(void)
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{
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int rc = 0;
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spl_proc_root = proc_mkdir("spl", NULL);
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if (!spl_proc_root) {
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printk("spl: Error unable to create /proc/spl/ directory\n");
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return -EINVAL;
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}
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spl_proc_debug_mask = spl_register_proc_entry("debug_mask", 0644,
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spl_proc_root, NULL,
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spl_proc_rd_debug_mask,
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spl_proc_wr_debug_mask);
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if (IS_ERR(spl_proc_debug_mask)) {
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rc = PTR_ERR(spl_proc_debug_mask);
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goto out;
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}
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spl_proc_debug_subsys = spl_register_proc_entry("debug_subsys", 0644,
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spl_proc_root, NULL,
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spl_proc_rd_debug_subsys,
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spl_proc_wr_debug_subsys);
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if (IS_ERR(spl_proc_debug_subsys)) {
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rc = PTR_ERR(spl_proc_debug_subsys);
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goto out2;
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}
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if ((rc = kmem_init()))
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goto out2;
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if ((rc = vn_init()))
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goto out2;
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strcpy(hw_serial, "007f0100"); /* loopback */
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printk("spl: Loaded Solaris Porting Layer v%s\n", VERSION);
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return 0;
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out2:
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if (spl_proc_debug_mask)
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remove_proc_entry("debug_mask", spl_proc_root);
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if (spl_proc_debug_subsys)
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remove_proc_entry("debug_subsys", spl_proc_root);
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out:
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remove_proc_entry("spl", NULL);
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return rc;
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}
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static void spl_fini(void)
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{
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vn_fini();
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kmem_fini();
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remove_proc_entry("debug_subsys", spl_proc_root);
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remove_proc_entry("debug_mask", spl_proc_root);
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remove_proc_entry("spl", NULL);
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return;
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}
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@ -291,11 +291,11 @@ kmem_fini(void)
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{
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#ifdef DEBUG_KMEM
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if (atomic64_read(&kmem_alloc_used) != 0)
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printk("Warning: kmem leaked %ld/%ld bytes\n",
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printk("spl: Warning kmem leaked %ld/%ld bytes\n",
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atomic_read(&kmem_alloc_used), kmem_alloc_max);
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if (atomic64_read(&vmem_alloc_used) != 0)
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printk("Warning: vmem leaked %ld/%ld bytes\n",
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printk("spl: Warning vmem leaked %ld/%ld bytes\n",
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atomic_read(&vmem_alloc_used), vmem_alloc_max);
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#endif
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}
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@ -90,7 +90,7 @@ __thread_create(caddr_t stk, size_t stksize, thread_func_t func,
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/* Solaris says this must never fail so we try forever */
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while ((pid = kernel_thread(thread_generic_wrapper, (void *)&tp, 0)) < 0)
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printk(KERN_ERR "Unable to create thread; pid = %ld\n", pid);
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printk(KERN_ERR "spl: Error unable to create thread; pid = %ld\n", pid);
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/* All signals are ignored due to sleeping TASK_UNINTERRUPTIBLE */
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for (;;) {
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@ -428,7 +428,6 @@ vn_getf(int fd)
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if (fp) {
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atomic_inc(&fp->f_ref);
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spin_unlock(&vn_file_lock);
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printk("found file\n");
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return fp;
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}
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@ -473,17 +472,13 @@ vn_getf(int fd)
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return fp;
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out_vnode:
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printk("out_vnode\n");
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vn_free(vp);
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out_fget:
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printk("out_fget\n");
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fput(lfp);
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out_mutex:
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printk("out_mutex\n");
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mutex_exit(&fp->f_lock);
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kmem_cache_free(vn_file_cache, fp);
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out:
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printk("out\n");
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return NULL;
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} /* getf() */
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EXPORT_SYMBOL(getf);
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@ -593,17 +588,17 @@ vn_fini(void)
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rc = kmem_cache_destroy(vn_file_cache);
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if (rc)
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printk("Warning leaked vn_file_cache objects\n");
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printk("spl: Warning leaked vn_file_cache objects\n");
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vn_file_cache = NULL;
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spin_unlock(&vn_file_lock);
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if (leaked > 0)
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printk("Warning: %d files leaked\n", leaked);
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printk("spl: Warning %d files leaked\n", leaked);
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rc = kmem_cache_destroy(vn_cache);
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if (rc)
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printk("Warning leaked vn_cache objects\n");
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printk("spl: Warning leaked vn_cache objects\n");
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return;
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} /* vn_fini() */
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@ -42,7 +42,7 @@
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\
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_sub_ = (splat_subsystem_t *)splat_##type##_init(); \
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if (_sub_ == NULL) { \
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printk(KERN_ERR "Error initializing: " #type "\n"); \
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printk(KERN_ERR "splat: Error initializing: " #type "\n"); \
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} else { \
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spin_lock(&splat_module_lock); \
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list_add_tail(&(_sub_->subsystem_list), \
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@ -70,7 +70,7 @@
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spin_unlock(&splat_module_lock); \
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\
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if (!_flag_) \
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printk(KERN_ERR "Error finalizing: " #type "\n"); \
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printk(KERN_ERR "splat: Error finalizing: " #type "\n"); \
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})
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#define SPLAT_TEST_INIT(sub, n, d, tid, func) \
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@ -78,7 +78,7 @@
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\
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_test_ = (splat_test_t *)kmalloc(sizeof(*_test_), GFP_KERNEL); \
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if (_test_ == NULL) { \
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printk(KERN_ERR "Error initializing: " n "/" #tid" \n");\
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printk(KERN_ERR "splat: Error initializing: " n "/" #tid" \n");\
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} else { \
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memset(_test_, 0, sizeof(*_test_)); \
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strncpy(_test_->desc.name, n, SPLAT_NAME_SIZE); \
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@ -107,7 +107,7 @@
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spin_unlock(&((sub)->test_lock)); \
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\
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if (!_flag_) \
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printk(KERN_ERR "Error finalizing: " #tid "\n"); \
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printk(KERN_ERR "splat: Error finalizing: " #tid "\n"); \
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})
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typedef int (*splat_test_func_t)(struct file *, void *);
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