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-rw-r--r--fs/xfs/support/ktrace.c323
1 files changed, 0 insertions, 323 deletions
diff --git a/fs/xfs/support/ktrace.c b/fs/xfs/support/ktrace.c
deleted file mode 100644
index 2d494c26717..00000000000
--- a/fs/xfs/support/ktrace.c
+++ /dev/null
@@ -1,323 +0,0 @@
-/*
- * Copyright (c) 2000-2003,2005 Silicon Graphics, Inc.
- * All Rights Reserved.
- *
- * This program is free software; you can redistribute it and/or
- * modify it under the terms of the GNU General Public License as
- * published by the Free Software Foundation.
- *
- * This program is distributed in the hope that it would be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
- * GNU General Public License for more details.
- *
- * You should have received a copy of the GNU General Public License
- * along with this program; if not, write the Free Software Foundation,
- * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
- */
-#include <xfs.h>
-
-static kmem_zone_t *ktrace_hdr_zone;
-static kmem_zone_t *ktrace_ent_zone;
-static int ktrace_zentries;
-
-void __init
-ktrace_init(int zentries)
-{
- ktrace_zentries = roundup_pow_of_two(zentries);
-
- ktrace_hdr_zone = kmem_zone_init(sizeof(ktrace_t),
- "ktrace_hdr");
- ASSERT(ktrace_hdr_zone);
-
- ktrace_ent_zone = kmem_zone_init(ktrace_zentries
- * sizeof(ktrace_entry_t),
- "ktrace_ent");
- ASSERT(ktrace_ent_zone);
-}
-
-void __exit
-ktrace_uninit(void)
-{
- kmem_zone_destroy(ktrace_hdr_zone);
- kmem_zone_destroy(ktrace_ent_zone);
-}
-
-/*
- * ktrace_alloc()
- *
- * Allocate a ktrace header and enough buffering for the given
- * number of entries. Round the number of entries up to a
- * power of 2 so we can do fast masking to get the index from
- * the atomic index counter.
- */
-ktrace_t *
-ktrace_alloc(int nentries, unsigned int __nocast sleep)
-{
- ktrace_t *ktp;
- ktrace_entry_t *ktep;
- int entries;
-
- ktp = (ktrace_t*)kmem_zone_alloc(ktrace_hdr_zone, sleep);
-
- if (ktp == (ktrace_t*)NULL) {
- /*
- * KM_SLEEP callers don't expect failure.
- */
- if (sleep & KM_SLEEP)
- panic("ktrace_alloc: NULL memory on KM_SLEEP request!");
-
- return NULL;
- }
-
- /*
- * Special treatment for buffers with the ktrace_zentries entries
- */
- entries = roundup_pow_of_two(nentries);
- if (entries == ktrace_zentries) {
- ktep = (ktrace_entry_t*)kmem_zone_zalloc(ktrace_ent_zone,
- sleep);
- } else {
- ktep = (ktrace_entry_t*)kmem_zalloc((entries * sizeof(*ktep)),
- sleep | KM_LARGE);
- }
-
- if (ktep == NULL) {
- /*
- * KM_SLEEP callers don't expect failure.
- */
- if (sleep & KM_SLEEP)
- panic("ktrace_alloc: NULL memory on KM_SLEEP request!");
-
- kmem_free(ktp);
-
- return NULL;
- }
-
- ktp->kt_entries = ktep;
- ktp->kt_nentries = entries;
- ASSERT(is_power_of_2(entries));
- ktp->kt_index_mask = entries - 1;
- atomic_set(&ktp->kt_index, 0);
- ktp->kt_rollover = 0;
- return ktp;
-}
-
-
-/*
- * ktrace_free()
- *
- * Free up the ktrace header and buffer. It is up to the caller
- * to ensure that no-one is referencing it.
- */
-void
-ktrace_free(ktrace_t *ktp)
-{
- if (ktp == (ktrace_t *)NULL)
- return;
-
- /*
- * Special treatment for the Vnode trace buffer.
- */
- if (ktp->kt_nentries == ktrace_zentries)
- kmem_zone_free(ktrace_ent_zone, ktp->kt_entries);
- else
- kmem_free(ktp->kt_entries);
-
- kmem_zone_free(ktrace_hdr_zone, ktp);
-}
-
-
-/*
- * Enter the given values into the "next" entry in the trace buffer.
- * kt_index is always the index of the next entry to be filled.
- */
-void
-ktrace_enter(
- ktrace_t *ktp,
- void *val0,
- void *val1,
- void *val2,
- void *val3,
- void *val4,
- void *val5,
- void *val6,
- void *val7,
- void *val8,
- void *val9,
- void *val10,
- void *val11,
- void *val12,
- void *val13,
- void *val14,
- void *val15)
-{
- int index;
- ktrace_entry_t *ktep;
-
- ASSERT(ktp != NULL);
-
- /*
- * Grab an entry by pushing the index up to the next one.
- */
- index = atomic_add_return(1, &ktp->kt_index);
- index = (index - 1) & ktp->kt_index_mask;
- if (!ktp->kt_rollover && index == ktp->kt_nentries - 1)
- ktp->kt_rollover = 1;
-
- ASSERT((index >= 0) && (index < ktp->kt_nentries));
-
- ktep = &(ktp->kt_entries[index]);
-
- ktep->val[0] = val0;
- ktep->val[1] = val1;
- ktep->val[2] = val2;
- ktep->val[3] = val3;
- ktep->val[4] = val4;
- ktep->val[5] = val5;
- ktep->val[6] = val6;
- ktep->val[7] = val7;
- ktep->val[8] = val8;
- ktep->val[9] = val9;
- ktep->val[10] = val10;
- ktep->val[11] = val11;
- ktep->val[12] = val12;
- ktep->val[13] = val13;
- ktep->val[14] = val14;
- ktep->val[15] = val15;
-}
-
-/*
- * Return the number of entries in the trace buffer.
- */
-int
-ktrace_nentries(
- ktrace_t *ktp)
-{
- int index;
- if (ktp == NULL)
- return 0;
-
- index = atomic_read(&ktp->kt_index) & ktp->kt_index_mask;
- return (ktp->kt_rollover ? ktp->kt_nentries : index);
-}
-
-/*
- * ktrace_first()
- *
- * This is used to find the start of the trace buffer.
- * In conjunction with ktrace_next() it can be used to
- * iterate through the entire trace buffer. This code does
- * not do any locking because it is assumed that it is called
- * from the debugger.
- *
- * The caller must pass in a pointer to a ktrace_snap
- * structure in which we will keep some state used to
- * iterate through the buffer. This state must not touched
- * by any code outside of this module.
- */
-ktrace_entry_t *
-ktrace_first(ktrace_t *ktp, ktrace_snap_t *ktsp)
-{
- ktrace_entry_t *ktep;
- int index;
- int nentries;
-
- if (ktp->kt_rollover)
- index = atomic_read(&ktp->kt_index) & ktp->kt_index_mask;
- else
- index = 0;
-
- ktsp->ks_start = index;
- ktep = &(ktp->kt_entries[index]);
-
- nentries = ktrace_nentries(ktp);
- index++;
- if (index < nentries) {
- ktsp->ks_index = index;
- } else {
- ktsp->ks_index = 0;
- if (index > nentries)
- ktep = NULL;
- }
- return ktep;
-}
-
-/*
- * ktrace_next()
- *
- * This is used to iterate through the entries of the given
- * trace buffer. The caller must pass in the ktrace_snap_t
- * structure initialized by ktrace_first(). The return value
- * will be either a pointer to the next ktrace_entry or NULL
- * if all of the entries have been traversed.
- */
-ktrace_entry_t *
-ktrace_next(
- ktrace_t *ktp,
- ktrace_snap_t *ktsp)
-{
- int index;
- ktrace_entry_t *ktep;
-
- index = ktsp->ks_index;
- if (index == ktsp->ks_start) {
- ktep = NULL;
- } else {
- ktep = &ktp->kt_entries[index];
- }
-
- index++;
- if (index == ktrace_nentries(ktp)) {
- ktsp->ks_index = 0;
- } else {
- ktsp->ks_index = index;
- }
-
- return ktep;
-}
-
-/*
- * ktrace_skip()
- *
- * Skip the next "count" entries and return the entry after that.
- * Return NULL if this causes us to iterate past the beginning again.
- */
-ktrace_entry_t *
-ktrace_skip(
- ktrace_t *ktp,
- int count,
- ktrace_snap_t *ktsp)
-{
- int index;
- int new_index;
- ktrace_entry_t *ktep;
- int nentries = ktrace_nentries(ktp);
-
- index = ktsp->ks_index;
- new_index = index + count;
- while (new_index >= nentries) {
- new_index -= nentries;
- }
- if (index == ktsp->ks_start) {
- /*
- * We've iterated around to the start, so we're done.
- */
- ktep = NULL;
- } else if ((new_index < index) && (index < ktsp->ks_index)) {
- /*
- * We've skipped past the start again, so we're done.
- */
- ktep = NULL;
- ktsp->ks_index = ktsp->ks_start;
- } else {
- ktep = &(ktp->kt_entries[new_index]);
- new_index++;
- if (new_index == nentries) {
- ktsp->ks_index = 0;
- } else {
- ktsp->ks_index = new_index;
- }
- }
- return ktep;
-}
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