-/* -*- mode: c; c-basic-offset: 8; indent-tabs-mode: nil; -*-
- * vim:expandtab:shiftwidth=8:tabstop=8:
- *
+/*
* GPL HEADER START
*
* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
*
* You should have received a copy of the GNU General Public License
* version 2 along with this program; If not, see
- * http://www.sun.com/software/products/lustre/docs/GPLv2.pdf
- *
- * Please contact Sun Microsystems, Inc., 4150 Network Circle, Santa Clara,
- * CA 95054 USA or visit www.sun.com if you need additional information or
- * have any questions.
+ * http://www.gnu.org/licenses/gpl-2.0.html
*
* GPL HEADER END
*/
/*
- * Copyright 2008 Sun Microsystems, Inc. All rights reserved
+ * Copyright (c) 2008, 2010, Oracle and/or its affiliates. All rights reserved.
* Use is subject to license terms.
+ *
+ * Copyright (c) 2012, 2017, Intel Corporation.
*/
/*
* This file is part of Lustre, http://www.lustre.org/
* Author: Phil Schwan <phil@clusterfs.com>
*/
-
#define DEBUG_SUBSYSTEM S_LNET
-#define LUSTRE_TRACEFILE_PRIVATE
#include "tracefile.h"
+#include <linux/ctype.h>
+#include <linux/fs.h>
+#include <linux/kthread.h>
+#include <linux/pagemap.h>
+#include <linux/poll.h>
+#include <linux/tty.h>
+#include <linux/uaccess.h>
+#include <libcfs/linux/linux-fs.h>
#include <libcfs/libcfs.h>
-/* XXX move things up to the top, comment */
-union trace_data_union (*trace_data[TCD_MAX_TYPES])[NR_CPUS] __cacheline_aligned;
-char tracefile[TRACEFILE_NAME_SIZE];
-long long tracefile_size = TRACEFILE_SIZE;
+enum cfs_trace_buf_type {
+ CFS_TCD_TYPE_PROC = 0,
+ CFS_TCD_TYPE_SOFTIRQ,
+ CFS_TCD_TYPE_IRQ,
+ CFS_TCD_TYPE_CNT
+};
+
+union cfs_trace_data_union (*cfs_trace_data[CFS_TCD_TYPE_CNT])[NR_CPUS] __cacheline_aligned;
+
+char cfs_tracefile[TRACEFILE_NAME_SIZE];
+long long cfs_tracefile_size = CFS_TRACEFILE_SIZE;
static struct tracefiled_ctl trace_tctl;
-struct semaphore trace_thread_sem;
+static DEFINE_MUTEX(cfs_trace_thread_mutex);
static int thread_running = 0;
-atomic_t tage_allocated = ATOMIC_INIT(0);
+static atomic_t cfs_tage_allocated = ATOMIC_INIT(0);
+static DECLARE_RWSEM(cfs_tracefile_sem);
static void put_pages_on_tcd_daemon_list(struct page_collection *pc,
- struct trace_cpu_data *tcd);
+ struct cfs_trace_cpu_data *tcd);
-static inline struct trace_page *tage_from_list(struct list_head *list)
+/* trace file lock routines */
+/* The walking argument indicates the locking comes from all tcd types
+ * iterator and we must lock it and dissable local irqs to avoid deadlocks
+ * with other interrupt locks that might be happening. See LU-1311
+ * for details.
+ */
+int cfs_trace_lock_tcd(struct cfs_trace_cpu_data *tcd, int walking)
+ __acquires(&tcd->tcd_lock)
{
- return list_entry(list, struct trace_page, linkage);
+ __LASSERT(tcd->tcd_type < CFS_TCD_TYPE_CNT);
+ if (tcd->tcd_type == CFS_TCD_TYPE_IRQ)
+ spin_lock_irqsave(&tcd->tcd_lock, tcd->tcd_lock_flags);
+ else if (tcd->tcd_type == CFS_TCD_TYPE_SOFTIRQ)
+ spin_lock_bh(&tcd->tcd_lock);
+ else if (unlikely(walking))
+ spin_lock_irq(&tcd->tcd_lock);
+ else
+ spin_lock(&tcd->tcd_lock);
+ return 1;
}
-static struct trace_page *tage_alloc(int gfp)
+void cfs_trace_unlock_tcd(struct cfs_trace_cpu_data *tcd, int walking)
+ __releases(&tcd->tcd_lock)
{
- cfs_page_t *page;
- struct trace_page *tage;
+ __LASSERT(tcd->tcd_type < CFS_TCD_TYPE_CNT);
+ if (tcd->tcd_type == CFS_TCD_TYPE_IRQ)
+ spin_unlock_irqrestore(&tcd->tcd_lock, tcd->tcd_lock_flags);
+ else if (tcd->tcd_type == CFS_TCD_TYPE_SOFTIRQ)
+ spin_unlock_bh(&tcd->tcd_lock);
+ else if (unlikely(walking))
+ spin_unlock_irq(&tcd->tcd_lock);
+ else
+ spin_unlock(&tcd->tcd_lock);
+}
- /*
- * Don't spam console with allocation failures: they will be reported
- * by upper layer anyway.
- */
- gfp |= CFS_ALLOC_NOWARN;
- page = cfs_alloc_page(gfp);
- if (page == NULL)
- return NULL;
-
- tage = cfs_alloc(sizeof(*tage), gfp);
- if (tage == NULL) {
- cfs_free_page(page);
- return NULL;
- }
+#define cfs_tcd_for_each(tcd, i, j) \
+ for (i = 0; i < CFS_TCD_TYPE_CNT && cfs_trace_data[i]; i++) \
+ for (j = 0, ((tcd) = &(*cfs_trace_data[i])[j].tcd); \
+ j < num_possible_cpus(); \
+ j++, (tcd) = &(*cfs_trace_data[i])[j].tcd)
- tage->page = page;
- atomic_inc(&tage_allocated);
- return tage;
+#define cfs_tcd_for_each_type_lock(tcd, i, cpu) \
+ for (i = 0; i < CFS_TCD_TYPE_CNT && cfs_trace_data[i] && \
+ (tcd = &(*cfs_trace_data[i])[cpu].tcd) && \
+ cfs_trace_lock_tcd(tcd, 1); cfs_trace_unlock_tcd(tcd, 1), i++)
+
+enum cfs_trace_buf_type cfs_trace_buf_idx_get(void)
+{
+ if (in_irq())
+ return CFS_TCD_TYPE_IRQ;
+ if (in_softirq())
+ return CFS_TCD_TYPE_SOFTIRQ;
+ return CFS_TCD_TYPE_PROC;
}
-static void tage_free(struct trace_page *tage)
+static inline struct cfs_trace_cpu_data *
+cfs_trace_get_tcd(void)
{
- __LASSERT(tage != NULL);
- __LASSERT(tage->page != NULL);
+ struct cfs_trace_cpu_data *tcd =
+ &(*cfs_trace_data[cfs_trace_buf_idx_get()])[get_cpu()].tcd;
+
+ cfs_trace_lock_tcd(tcd, 0);
- cfs_free_page(tage->page);
- cfs_free(tage);
- atomic_dec(&tage_allocated);
+ return tcd;
}
-static void tage_to_tail(struct trace_page *tage, struct list_head *queue)
+static inline void cfs_trace_put_tcd(struct cfs_trace_cpu_data *tcd)
{
- __LASSERT(tage != NULL);
- __LASSERT(queue != NULL);
+ cfs_trace_unlock_tcd(tcd, 0);
- list_move_tail(&tage->linkage, queue);
+ put_cpu();
}
-int trace_refill_stock(struct trace_cpu_data *tcd, int gfp,
- struct list_head *stock)
+static inline struct cfs_trace_page *
+cfs_tage_from_list(struct list_head *list)
{
- int i;
+ return list_entry(list, struct cfs_trace_page, linkage);
+}
- /*
- * XXX nikita: do NOT call portals_debug_msg() (CDEBUG/ENTRY/EXIT)
- * from here: this will lead to infinite recursion.
- */
+static struct cfs_trace_page *cfs_tage_alloc(gfp_t gfp)
+{
+ struct page *page;
+ struct cfs_trace_page *tage;
- for (i = 0; i + tcd->tcd_cur_stock_pages < TCD_STOCK_PAGES ; ++ i) {
- struct trace_page *tage;
+ /* My caller is trying to free memory */
+ if (!in_interrupt() && (current->flags & PF_MEMALLOC))
+ return NULL;
- tage = tage_alloc(gfp);
- if (tage == NULL)
- break;
- list_add_tail(&tage->linkage, stock);
- }
- return i;
+ /*
+ * Don't spam console with allocation failures: they will be reported
+ * by upper layer anyway.
+ */
+ gfp |= __GFP_NOWARN;
+ page = alloc_page(gfp);
+ if (page == NULL)
+ return NULL;
+
+ tage = kmalloc(sizeof(*tage), gfp);
+ if (tage == NULL) {
+ __free_page(page);
+ return NULL;
+ }
+
+ tage->page = page;
+ atomic_inc(&cfs_tage_allocated);
+ return tage;
+}
+
+static void cfs_tage_free(struct cfs_trace_page *tage)
+{
+ __LASSERT(tage != NULL);
+ __LASSERT(tage->page != NULL);
+
+ __free_page(tage->page);
+ kfree(tage);
+ atomic_dec(&cfs_tage_allocated);
+}
+
+static void cfs_tage_to_tail(struct cfs_trace_page *tage,
+ struct list_head *queue)
+{
+ __LASSERT(tage != NULL);
+ __LASSERT(queue != NULL);
+
+ list_move_tail(&tage->linkage, queue);
}
/* return a page that has 'len' bytes left at the end */
-static struct trace_page *trace_get_tage_try(struct trace_cpu_data *tcd,
- unsigned long len)
+static struct cfs_trace_page *
+cfs_trace_get_tage_try(struct cfs_trace_cpu_data *tcd, unsigned long len)
{
- struct trace_page *tage;
+ struct cfs_trace_page *tage;
if (tcd->tcd_cur_pages > 0) {
- __LASSERT(!list_empty(&tcd->tcd_pages));
- tage = tage_from_list(tcd->tcd_pages.prev);
- if (tage->used + len <= CFS_PAGE_SIZE)
+ __LASSERT(!list_empty(&tcd->tcd_pages));
+ tage = cfs_tage_from_list(tcd->tcd_pages.prev);
+ if (tage->used + len <= PAGE_SIZE)
return tage;
}
- if (tcd->tcd_cur_pages < tcd->tcd_max_pages) {
- if (tcd->tcd_cur_stock_pages > 0) {
- tage = tage_from_list(tcd->tcd_stock_pages.prev);
- -- tcd->tcd_cur_stock_pages;
- list_del_init(&tage->linkage);
- } else {
- tage = tage_alloc(CFS_ALLOC_ATOMIC);
- if (tage == NULL) {
- printk(KERN_WARNING
- "failure to allocate a tage (%ld)\n",
- tcd->tcd_cur_pages);
- return NULL;
- }
- }
-
- tage->used = 0;
- tage->cpu = smp_processor_id();
- tage->type = tcd->tcd_type;
- list_add_tail(&tage->linkage, &tcd->tcd_pages);
- tcd->tcd_cur_pages++;
-
- if (tcd->tcd_cur_pages > 8 && thread_running) {
- struct tracefiled_ctl *tctl = &trace_tctl;
- /*
- * wake up tracefiled to process some pages.
- */
- cfs_waitq_signal(&tctl->tctl_waitq);
- }
- return tage;
+ if (tcd->tcd_cur_pages < tcd->tcd_max_pages) {
+ if (tcd->tcd_cur_stock_pages > 0) {
+ tage = cfs_tage_from_list(tcd->tcd_stock_pages.prev);
+ --tcd->tcd_cur_stock_pages;
+ list_del_init(&tage->linkage);
+ } else {
+ tage = cfs_tage_alloc(GFP_ATOMIC);
+ if (unlikely(tage == NULL)) {
+ if ((!(current->flags & PF_MEMALLOC) ||
+ in_interrupt()) && printk_ratelimit())
+ pr_warn("Lustre: cannot allocate a tage (%ld)\n",
+ tcd->tcd_cur_pages);
+ return NULL;
+ }
+ }
+
+ tage->used = 0;
+ tage->cpu = smp_processor_id();
+ tage->type = tcd->tcd_type;
+ list_add_tail(&tage->linkage, &tcd->tcd_pages);
+ tcd->tcd_cur_pages++;
+
+ if (tcd->tcd_cur_pages > 8 && thread_running) {
+ struct tracefiled_ctl *tctl = &trace_tctl;
+ /*
+ * wake up tracefiled to process some pages.
+ */
+ wake_up(&tctl->tctl_waitq);
+ }
+ return tage;
}
return NULL;
}
-static void tcd_shrink(struct trace_cpu_data *tcd)
+static void cfs_tcd_shrink(struct cfs_trace_cpu_data *tcd)
{
- int pgcount = tcd->tcd_cur_pages / 10;
- struct page_collection pc;
- struct trace_page *tage;
- struct trace_page *tmp;
+ int pgcount = tcd->tcd_cur_pages / 10;
+ struct page_collection pc;
+ struct cfs_trace_page *tage;
+ struct cfs_trace_page *tmp;
/*
* XXX nikita: do NOT call portals_debug_msg() (CDEBUG/ENTRY/EXIT)
* from here: this will lead to infinite recursion.
*/
- if (printk_ratelimit())
- printk(KERN_WARNING "debug daemon buffer overflowed; "
- "discarding 10%% of pages (%d of %ld)\n",
- pgcount + 1, tcd->tcd_cur_pages);
+ if (printk_ratelimit())
+ pr_warn("Lustre: debug daemon buffer overflowed; discarding 10%% of pages (%d of %ld)\n",
+ pgcount + 1, tcd->tcd_cur_pages);
- CFS_INIT_LIST_HEAD(&pc.pc_pages);
- spin_lock_init(&pc.pc_lock);
+ INIT_LIST_HEAD(&pc.pc_pages);
- list_for_each_entry_safe(tage, tmp, &tcd->tcd_pages, linkage) {
- if (pgcount-- == 0)
- break;
+ list_for_each_entry_safe(tage, tmp, &tcd->tcd_pages, linkage) {
+ if (pgcount-- == 0)
+ break;
- list_move_tail(&tage->linkage, &pc.pc_pages);
- tcd->tcd_cur_pages--;
- }
- put_pages_on_tcd_daemon_list(&pc, tcd);
+ list_move_tail(&tage->linkage, &pc.pc_pages);
+ tcd->tcd_cur_pages--;
+ }
+ put_pages_on_tcd_daemon_list(&pc, tcd);
}
/* return a page that has 'len' bytes left at the end */
-static struct trace_page *trace_get_tage(struct trace_cpu_data *tcd,
- unsigned long len)
+static struct cfs_trace_page *cfs_trace_get_tage(struct cfs_trace_cpu_data *tcd,
+ unsigned long len)
{
- struct trace_page *tage;
+ struct cfs_trace_page *tage;
- /*
- * XXX nikita: do NOT call portals_debug_msg() (CDEBUG/ENTRY/EXIT)
- * from here: this will lead to infinite recursion.
- */
+ /*
+ * XXX nikita: do NOT call portals_debug_msg() (CDEBUG/ENTRY/EXIT)
+ * from here: this will lead to infinite recursion.
+ */
- if (len > CFS_PAGE_SIZE) {
- printk(KERN_ERR
- "cowardly refusing to write %lu bytes in a page\n", len);
- return NULL;
- }
+ if (len > PAGE_SIZE) {
+ pr_err("LustreError: cowardly refusing to write %lu bytes in a page\n",
+ len);
+ return NULL;
+ }
- tage = trace_get_tage_try(tcd, len);
+ tage = cfs_trace_get_tage_try(tcd, len);
if (tage != NULL)
return tage;
if (thread_running)
- tcd_shrink(tcd);
+ cfs_tcd_shrink(tcd);
if (tcd->tcd_cur_pages > 0) {
- tage = tage_from_list(tcd->tcd_pages.next);
+ tage = cfs_tage_from_list(tcd->tcd_pages.next);
tage->used = 0;
- tage_to_tail(tage, &tcd->tcd_pages);
+ cfs_tage_to_tail(tage, &tcd->tcd_pages);
}
return tage;
}
-int libcfs_debug_vmsg2(cfs_debug_limit_state_t *cdls, int subsys, int mask,
- const char *file, const char *fn, const int line,
- const char *format1, va_list args,
- const char *format2, ...)
+static void cfs_set_ptldebug_header(struct ptldebug_header *header,
+ struct libcfs_debug_msg_data *msgdata,
+ unsigned long stack)
{
- struct trace_cpu_data *tcd = NULL;
- struct ptldebug_header header;
- struct trace_page *tage;
- /* string_buf is used only if tcd != NULL, and is always set then */
- char *string_buf = NULL;
- char *debug_buf;
- int known_size;
- int needed = 85; /* average message length */
- int max_nob;
- va_list ap;
- int depth;
- int i;
- int remain;
-
- if (strchr(file, '/'))
- file = strrchr(file, '/') + 1;
-
-
- set_ptldebug_header(&header, subsys, mask, line, CDEBUG_STACK());
-
- tcd = trace_get_tcd();
- if (tcd == NULL) /* arch may not log in IRQ context */
- goto console;
-
- if (tcd->tcd_shutting_down) {
- trace_put_tcd(tcd);
- tcd = NULL;
- goto console;
- }
+ struct timespec64 ts;
- depth = __current_nesting_level();
- known_size = strlen(file) + 1 + depth;
- if (fn)
- known_size += strlen(fn) + 1;
+ ktime_get_real_ts64(&ts);
- if (libcfs_debug_binary)
- known_size += sizeof(header);
+ header->ph_subsys = msgdata->msg_subsys;
+ header->ph_mask = msgdata->msg_mask;
+ header->ph_cpu_id = smp_processor_id();
+ header->ph_type = cfs_trace_buf_idx_get();
+ /* y2038 safe since all user space treats this as unsigned, but
+ * will overflow in 2106
+ */
+ header->ph_sec = (u32)ts.tv_sec;
+ header->ph_usec = ts.tv_nsec / NSEC_PER_USEC;
+ header->ph_stack = stack;
+ header->ph_pid = current->pid;
+ header->ph_line_num = msgdata->msg_line;
+ header->ph_extern_pid = 0;
+}
- /*/
- * '2' used because vsnprintf return real size required for output
- * _without_ terminating NULL.
- * if needed is to small for this format.
- */
- for (i=0;i<2;i++) {
- tage = trace_get_tage(tcd, needed + known_size + 1);
- if (tage == NULL) {
- if (needed + known_size > CFS_PAGE_SIZE)
- mask |= D_ERROR;
-
- trace_put_tcd(tcd);
- tcd = NULL;
- goto console;
- }
-
- string_buf = (char *)cfs_page_address(tage->page)+tage->used+known_size;
-
- max_nob = CFS_PAGE_SIZE - tage->used - known_size;
- if (max_nob <= 0) {
- printk(KERN_EMERG "negative max_nob: %i\n", max_nob);
- mask |= D_ERROR;
- trace_put_tcd(tcd);
- tcd = NULL;
- goto console;
- }
-
- needed = 0;
- if (format1) {
- va_copy(ap, args);
- needed = vsnprintf(string_buf, max_nob, format1, ap);
- va_end(ap);
- }
-
-
- if (format2) {
- remain = max_nob - needed;
- if (remain < 0)
- remain = 0;
-
- va_start(ap, format2);
- needed += vsnprintf(string_buf+needed, remain, format2, ap);
- va_end(ap);
- }
-
- if (needed < max_nob) /* well. printing ok.. */
- break;
- }
-
- if (*(string_buf+needed-1) != '\n')
- printk(KERN_INFO "format at %s:%d:%s doesn't end in newline\n",
- file, line, fn);
-
- header.ph_len = known_size + needed;
- debug_buf = (char *)cfs_page_address(tage->page) + tage->used;
-
- if (libcfs_debug_binary) {
- memcpy(debug_buf, &header, sizeof(header));
- tage->used += sizeof(header);
- debug_buf += sizeof(header);
- }
+/**
+ * tty_write_msg - write a message to a certain tty, not just the console.
+ * @tty: the destination tty_struct
+ * @msg: the message to write
+ *
+ * tty_write_message is not exported, so write a same function for it
+ *
+ */
+static void tty_write_msg(struct tty_struct *tty, const char *msg)
+{
+ mutex_lock(&tty->atomic_write_lock);
+ tty_lock(tty);
+ if (tty->ops->write && tty->count > 0)
+ tty->ops->write(tty, msg, strlen(msg));
+ tty_unlock(tty);
+ mutex_unlock(&tty->atomic_write_lock);
+ wake_up_interruptible_poll(&tty->write_wait, POLLOUT);
+}
- /* indent message according to the nesting level */
- while (depth-- > 0) {
- *(debug_buf++) = '.';
- ++ tage->used;
- }
+static void cfs_tty_write_message(const char *prefix, int mask, const char *msg)
+{
+ struct tty_struct *tty;
+
+ tty = get_current_tty();
+ if (!tty)
+ return;
+
+ tty_write_msg(tty, prefix);
+ if ((mask & D_EMERG) || (mask & D_ERROR))
+ tty_write_msg(tty, "Error");
+ tty_write_msg(tty, ": ");
+ tty_write_msg(tty, msg);
+ tty_kref_put(tty);
+}
- strcpy(debug_buf, file);
- tage->used += strlen(file) + 1;
- debug_buf += strlen(file) + 1;
+static void cfs_vprint_to_console(struct ptldebug_header *hdr, int mask,
+ struct va_format *vaf, const char *file,
+ const char *fn)
+{
+ char *prefix = "Lustre";
+
+ if (hdr->ph_subsys == S_LND || hdr->ph_subsys == S_LNET)
+ prefix = "LNet";
+
+ if (mask & D_CONSOLE) {
+ if (mask & D_EMERG)
+ pr_emerg("%sError: %pV", prefix, vaf);
+ else if (mask & D_ERROR)
+ pr_err("%sError: %pV", prefix, vaf);
+ else if (mask & D_WARNING)
+ pr_warn("%s: %pV", prefix, vaf);
+ else if (mask & libcfs_printk)
+ pr_info("%s: %pV", prefix, vaf);
+ } else {
+ if (mask & D_EMERG)
+ pr_emerg("%sError: %d:%d:(%s:%d:%s()) %pV", prefix,
+ hdr->ph_pid, hdr->ph_extern_pid, file,
+ hdr->ph_line_num, fn, vaf);
+ else if (mask & D_ERROR)
+ pr_err("%sError: %d:%d:(%s:%d:%s()) %pV", prefix,
+ hdr->ph_pid, hdr->ph_extern_pid, file,
+ hdr->ph_line_num, fn, vaf);
+ else if (mask & D_WARNING)
+ pr_warn("%s: %d:%d:(%s:%d:%s()) %pV", prefix,
+ hdr->ph_pid, hdr->ph_extern_pid, file,
+ hdr->ph_line_num, fn, vaf);
+ else if (mask & (D_CONSOLE | libcfs_printk))
+ pr_info("%s: %pV", prefix, vaf);
+ }
- if (fn) {
- strcpy(debug_buf, fn);
- tage->used += strlen(fn) + 1;
- debug_buf += strlen(fn) + 1;
- }
+ if (mask & D_TTY)
+ /* tty_write_msg doesn't handle formatting */
+ cfs_tty_write_message(prefix, mask, vaf->fmt);
+}
- __LASSERT(debug_buf == string_buf);
+static void cfs_print_to_console(struct ptldebug_header *hdr, int mask,
+ const char *file, const char *fn,
+ const char *fmt, ...)
+{
+ struct va_format vaf;
+ va_list args;
- tage->used += needed;
- __LASSERT (tage->used <= CFS_PAGE_SIZE);
+ va_start(args, fmt);
+ vaf.fmt = fmt;
+ vaf.va = &args;
+ cfs_vprint_to_console(hdr, mask, &vaf, file, fn);
+}
-console:
- if ((mask & libcfs_printk) == 0) {
- /* no console output requested */
- if (tcd != NULL)
- trace_put_tcd(tcd);
- return 1;
- }
+int libcfs_debug_msg(struct libcfs_debug_msg_data *msgdata,
+ const char *format, ...)
+{
+ struct cfs_trace_cpu_data *tcd = NULL;
+ struct ptldebug_header header = {0};
+ struct cfs_trace_page *tage;
+ /* string_buf is used only if tcd != NULL, and is always set then */
+ char *string_buf = NULL;
+ char *debug_buf;
+ int known_size;
+ int needed = 85; /* seeded with average message length */
+ int max_nob;
+ va_list ap;
+ int retry;
+ int mask = msgdata->msg_mask;
+ char *file = (char *)msgdata->msg_file;
+ struct cfs_debug_limit_state *cdls = msgdata->msg_cdls;
+
+ if (strchr(file, '/'))
+ file = strrchr(file, '/') + 1;
+
+ tcd = cfs_trace_get_tcd();
+
+ /* cfs_trace_get_tcd() grabs a lock, which disables preemption and
+ * pins us to a particular CPU. This avoids an smp_processor_id()
+ * warning on Linux when debugging is enabled.
+ */
+ cfs_set_ptldebug_header(&header, msgdata, CDEBUG_STACK());
- if (cdls != NULL) {
- if (libcfs_console_ratelimit &&
- cdls->cdls_next != 0 && /* not first time ever */
- !cfs_time_after(cfs_time_current(), cdls->cdls_next)) {
- /* skipping a console message */
- cdls->cdls_count++;
- if (tcd != NULL)
- trace_put_tcd(tcd);
- return 1;
- }
-
- if (cfs_time_after(cfs_time_current(), cdls->cdls_next +
- libcfs_console_max_delay
- + cfs_time_seconds(10))) {
- /* last timeout was a long time ago */
- cdls->cdls_delay /= libcfs_console_backoff * 4;
- } else {
- cdls->cdls_delay *= libcfs_console_backoff;
-
- if (cdls->cdls_delay < libcfs_console_min_delay)
- cdls->cdls_delay = libcfs_console_min_delay;
- else if (cdls->cdls_delay > libcfs_console_max_delay)
- cdls->cdls_delay = libcfs_console_max_delay;
- }
-
- /* ensure cdls_next is never zero after it's been seen */
- cdls->cdls_next = (cfs_time_current() + cdls->cdls_delay) | 1;
- }
+ if (!tcd) /* arch may not log in IRQ context */
+ goto console;
- if (tcd != NULL) {
- print_to_console(&header, mask, string_buf, needed, file, fn);
- trace_put_tcd(tcd);
- } else {
- string_buf = trace_get_console_buffer();
-
- needed = 0;
- if (format1 != NULL) {
- va_copy(ap, args);
- needed = vsnprintf(string_buf, TRACE_CONSOLE_BUFFER_SIZE, format1, ap);
- va_end(ap);
- }
- if (format2 != NULL) {
- remain = TRACE_CONSOLE_BUFFER_SIZE - needed;
- if (remain > 0) {
- va_start(ap, format2);
- needed += vsnprintf(string_buf+needed, remain, format2, ap);
- va_end(ap);
- }
- }
- print_to_console(&header, mask,
- string_buf, needed, file, fn);
-
- trace_put_console_buffer(string_buf);
- }
+ if (tcd->tcd_cur_pages == 0)
+ header.ph_flags |= PH_FLAG_FIRST_RECORD;
- if (cdls != NULL && cdls->cdls_count != 0) {
- string_buf = trace_get_console_buffer();
+ if (tcd->tcd_shutting_down) {
+ cfs_trace_put_tcd(tcd);
+ tcd = NULL;
+ goto console;
+ }
- needed = snprintf(string_buf, TRACE_CONSOLE_BUFFER_SIZE,
- "Skipped %d previous similar message%s\n",
- cdls->cdls_count, (cdls->cdls_count > 1) ? "s" : "");
+ known_size = strlen(file) + 1;
+ if (msgdata->msg_fn)
+ known_size += strlen(msgdata->msg_fn) + 1;
- print_to_console(&header, mask,
- string_buf, needed, file, fn);
+ if (libcfs_debug_binary)
+ known_size += sizeof(header);
- trace_put_console_buffer(string_buf);
- cdls->cdls_count = 0;
- }
+ /*
+ * May perform an additional pass to update 'needed' and increase
+ * tage buffer size to match vsnprintf reported size required
+ * On the second pass (retry=1) use vscnprintf [which returns
+ * number of bytes written not including the terminating nul]
+ * to clarify `needed` is used as number of bytes written
+ * for the remainder of this function
+ */
+ for (retry = 0; retry < 2; retry++) {
+ tage = cfs_trace_get_tage(tcd, needed + known_size + 1);
+ if (!tage) {
+ if (needed + known_size > PAGE_SIZE)
+ mask |= D_ERROR;
+
+ cfs_trace_put_tcd(tcd);
+ tcd = NULL;
+ goto console;
+ }
+
+ string_buf = (char *)page_address(tage->page) +
+ tage->used + known_size;
+
+ max_nob = PAGE_SIZE - tage->used - known_size;
+ if (max_nob <= 0) {
+ pr_emerg("LustreError: negative max_nob: %d\n",
+ max_nob);
+ mask |= D_ERROR;
+ cfs_trace_put_tcd(tcd);
+ tcd = NULL;
+ goto console;
+ }
+
+ va_start(ap, format);
+ if (retry)
+ needed = vscnprintf(string_buf, max_nob, format, ap);
+ else
+ needed = vsnprintf(string_buf, max_nob, format, ap);
+ va_end(ap);
- return 0;
-}
-EXPORT_SYMBOL(libcfs_debug_vmsg2);
+ if (needed < max_nob) /* well. printing ok.. */
+ break;
+ }
-void
-libcfs_assertion_failed(const char *expr, const char *file,
- const char *func, const int line)
-{
- libcfs_debug_msg(NULL, 0, D_EMERG, file, func, line,
- "ASSERTION(%s) failed\n", expr);
- lbug_with_loc(file, func, line);
+ /* `needed` is actual bytes written to string_buf */
+ if (*(string_buf + needed - 1) != '\n') {
+ pr_info("Lustre: format at %s:%d:%s doesn't end in newline\n",
+ file, msgdata->msg_line, msgdata->msg_fn);
+ } else if (mask & D_TTY) {
+ /* TTY needs '\r\n' to move carriage to leftmost position */
+ if (needed < 2 || *(string_buf + needed - 2) != '\r')
+ pr_info("Lustre: format at %s:%d:%s doesn't end in '\\r\\n'\n",
+ file, msgdata->msg_line, msgdata->msg_fn);
+ if (strnchr(string_buf, needed, '%'))
+ pr_info("Lustre: format at %s:%d:%s mustn't contain %%\n",
+ file, msgdata->msg_line, msgdata->msg_fn);
+ }
+
+ header.ph_len = known_size + needed;
+ debug_buf = (char *)page_address(tage->page) + tage->used;
+
+ if (libcfs_debug_binary) {
+ memcpy(debug_buf, &header, sizeof(header));
+ tage->used += sizeof(header);
+ debug_buf += sizeof(header);
+ }
+
+ strlcpy(debug_buf, file, PAGE_SIZE - tage->used);
+ tage->used += strlen(file) + 1;
+ debug_buf += strlen(file) + 1;
+
+ if (msgdata->msg_fn) {
+ strlcpy(debug_buf, msgdata->msg_fn, PAGE_SIZE - tage->used);
+ tage->used += strlen(msgdata->msg_fn) + 1;
+ debug_buf += strlen(msgdata->msg_fn) + 1;
+ }
+
+ __LASSERT(debug_buf == string_buf);
+
+ tage->used += needed;
+ __LASSERT(tage->used <= PAGE_SIZE);
+
+console:
+ if ((mask & libcfs_printk) == 0) {
+ /* no console output requested */
+ if (tcd != NULL)
+ cfs_trace_put_tcd(tcd);
+ return 1;
+ }
+
+ if (cdls != NULL) {
+ if (libcfs_console_ratelimit &&
+ cdls->cdls_next != 0 && /* not first time ever */
+ time_before(jiffies, cdls->cdls_next)) {
+ /* skipping a console message */
+ cdls->cdls_count++;
+ if (tcd != NULL)
+ cfs_trace_put_tcd(tcd);
+ return 1;
+ }
+
+ if (time_after(jiffies, cdls->cdls_next +
+ libcfs_console_max_delay +
+ cfs_time_seconds(10))) {
+ /* last timeout was a long time ago */
+ cdls->cdls_delay /= libcfs_console_backoff * 4;
+ } else {
+ cdls->cdls_delay *= libcfs_console_backoff;
+ }
+
+ if (cdls->cdls_delay < libcfs_console_min_delay)
+ cdls->cdls_delay = libcfs_console_min_delay;
+ else if (cdls->cdls_delay > libcfs_console_max_delay)
+ cdls->cdls_delay = libcfs_console_max_delay;
+
+ /* ensure cdls_next is never zero after it's been seen */
+ cdls->cdls_next = (jiffies + cdls->cdls_delay) | 1;
+ }
+
+ if (tcd) {
+ cfs_print_to_console(&header, mask, file, msgdata->msg_fn,
+ "%s", string_buf);
+ cfs_trace_put_tcd(tcd);
+ } else {
+ struct va_format vaf;
+
+ va_start(ap, format);
+ vaf.fmt = format;
+ vaf.va = ≈
+ cfs_vprint_to_console(&header, mask,
+ &vaf, file, msgdata->msg_fn);
+ va_end(ap);
+ }
+
+ if (cdls != NULL && cdls->cdls_count != 0) {
+ /* Do not allow print this to TTY */
+ cfs_print_to_console(&header, mask & ~D_TTY, file,
+ msgdata->msg_fn,
+ "Skipped %d previous similar message%s\n",
+ cdls->cdls_count,
+ (cdls->cdls_count > 1) ? "s" : "");
+
+ cdls->cdls_count = 0;
+ }
+
+ return 0;
}
-EXPORT_SYMBOL(libcfs_assertion_failed);
+EXPORT_SYMBOL(libcfs_debug_msg);
void
-trace_assertion_failed(const char *str,
- const char *fn, const char *file, int line)
+cfs_trace_assertion_failed(const char *str,
+ struct libcfs_debug_msg_data *msgdata)
{
- struct ptldebug_header hdr;
+ struct ptldebug_header hdr;
- libcfs_panic_in_progress = 1;
- libcfs_catastrophe = 1;
- mb();
+ libcfs_panic_in_progress = 1;
+ libcfs_catastrophe = 1;
+ smp_mb();
- set_ptldebug_header(&hdr, DEBUG_SUBSYSTEM, D_EMERG, line,
- CDEBUG_STACK());
+ cfs_set_ptldebug_header(&hdr, msgdata, CDEBUG_STACK());
- print_to_console(&hdr, D_EMERG, str, strlen(str), file, fn);
+ cfs_print_to_console(&hdr, D_EMERG, msgdata->msg_file, msgdata->msg_fn,
+ "%s", str);
- LIBCFS_PANIC("Lustre debug assertion failure\n");
+ panic("Lustre debug assertion failure\n");
- /* not reached */
+ /* not reached */
}
static void
panic_collect_pages(struct page_collection *pc)
{
- /* Do the collect_pages job on a single CPU: assumes that all other
- * CPUs have been stopped during a panic. If this isn't true for some
- * arch, this will have to be implemented separately in each arch. */
- int i;
- int j;
- struct trace_cpu_data *tcd;
-
- CFS_INIT_LIST_HEAD(&pc->pc_pages);
-
- tcd_for_each(tcd, i, j) {
- list_splice_init(&tcd->tcd_pages, &pc->pc_pages);
- tcd->tcd_cur_pages = 0;
-
- if (pc->pc_want_daemon_pages) {
- list_splice_init(&tcd->tcd_daemon_pages, &pc->pc_pages);
- tcd->tcd_cur_daemon_pages = 0;
- }
- }
+ /* Do the collect_pages job on a single CPU: assumes that all other
+ * CPUs have been stopped during a panic. If this isn't true for some
+ * arch, this will have to be implemented separately in each arch. */
+ int i;
+ int j;
+ struct cfs_trace_cpu_data *tcd;
+
+ INIT_LIST_HEAD(&pc->pc_pages);
+
+ cfs_tcd_for_each(tcd, i, j) {
+ list_splice_init(&tcd->tcd_pages, &pc->pc_pages);
+ tcd->tcd_cur_pages = 0;
+
+ if (pc->pc_want_daemon_pages) {
+ list_splice_init(&tcd->tcd_daemon_pages,
+ &pc->pc_pages);
+ tcd->tcd_cur_daemon_pages = 0;
+ }
+ }
}
-static void collect_pages_on_cpu(void *info)
+static void collect_pages_on_all_cpus(struct page_collection *pc)
{
- struct trace_cpu_data *tcd;
- struct page_collection *pc = info;
- int i;
-
- spin_lock(&pc->pc_lock);
- tcd_for_each_type_lock(tcd, i) {
- list_splice_init(&tcd->tcd_pages, &pc->pc_pages);
- tcd->tcd_cur_pages = 0;
- if (pc->pc_want_daemon_pages) {
- list_splice_init(&tcd->tcd_daemon_pages, &pc->pc_pages);
- tcd->tcd_cur_daemon_pages = 0;
- }
- }
- spin_unlock(&pc->pc_lock);
+ struct cfs_trace_cpu_data *tcd;
+ int i, cpu;
+
+ for_each_possible_cpu(cpu) {
+ cfs_tcd_for_each_type_lock(tcd, i, cpu) {
+ list_splice_init(&tcd->tcd_pages, &pc->pc_pages);
+ tcd->tcd_cur_pages = 0;
+ if (pc->pc_want_daemon_pages) {
+ list_splice_init(&tcd->tcd_daemon_pages,
+ &pc->pc_pages);
+ tcd->tcd_cur_daemon_pages = 0;
+ }
+ }
+ }
}
static void collect_pages(struct page_collection *pc)
{
- CFS_INIT_LIST_HEAD(&pc->pc_pages);
+ INIT_LIST_HEAD(&pc->pc_pages);
- if (libcfs_panic_in_progress)
- panic_collect_pages(pc);
- else
- trace_call_on_all_cpus(collect_pages_on_cpu, pc);
+ if (libcfs_panic_in_progress)
+ panic_collect_pages(pc);
+ else
+ collect_pages_on_all_cpus(pc);
}
-static void put_pages_back_on_cpu(void *info)
+static void put_pages_back_on_all_cpus(struct page_collection *pc)
{
- struct page_collection *pc = info;
- struct trace_cpu_data *tcd;
- struct list_head *cur_head;
- struct trace_page *tage;
- struct trace_page *tmp;
- int i;
+ struct cfs_trace_cpu_data *tcd;
+ struct list_head *cur_head;
+ struct cfs_trace_page *tage;
+ struct cfs_trace_page *tmp;
+ int i, cpu;
- spin_lock(&pc->pc_lock);
- tcd_for_each_type_lock(tcd, i) {
- cur_head = tcd->tcd_pages.next;
+ for_each_possible_cpu(cpu) {
+ cfs_tcd_for_each_type_lock(tcd, i, cpu) {
+ cur_head = tcd->tcd_pages.next;
- list_for_each_entry_safe(tage, tmp, &pc->pc_pages, linkage) {
+ list_for_each_entry_safe(tage, tmp, &pc->pc_pages,
+ linkage) {
- __LASSERT_TAGE_INVARIANT(tage);
+ __LASSERT_TAGE_INVARIANT(tage);
- if (tage->cpu != smp_processor_id() || tage->type != i)
- continue;
+ if (tage->cpu != cpu || tage->type != i)
+ continue;
- tage_to_tail(tage, cur_head);
- tcd->tcd_cur_pages++;
- }
- }
- spin_unlock(&pc->pc_lock);
+ cfs_tage_to_tail(tage, cur_head);
+ tcd->tcd_cur_pages++;
+ }
+ }
+ }
}
static void put_pages_back(struct page_collection *pc)
{
if (!libcfs_panic_in_progress)
- trace_call_on_all_cpus(put_pages_back_on_cpu, pc);
+ put_pages_back_on_all_cpus(pc);
}
/* Add pages to a per-cpu debug daemon ringbuffer. This buffer makes sure that
* if we have been steadily writing (and otherwise discarding) pages via the
* debug daemon. */
static void put_pages_on_tcd_daemon_list(struct page_collection *pc,
- struct trace_cpu_data *tcd)
+ struct cfs_trace_cpu_data *tcd)
{
- struct trace_page *tage;
- struct trace_page *tmp;
+ struct cfs_trace_page *tage;
+ struct cfs_trace_page *tmp;
- spin_lock(&pc->pc_lock);
- list_for_each_entry_safe(tage, tmp, &pc->pc_pages, linkage) {
+ list_for_each_entry_safe(tage, tmp, &pc->pc_pages, linkage) {
+ __LASSERT_TAGE_INVARIANT(tage);
- __LASSERT_TAGE_INVARIANT(tage);
+ if (tage->cpu != tcd->tcd_cpu || tage->type != tcd->tcd_type)
+ continue;
- if (tage->cpu != smp_processor_id() ||
- tage->type != tcd->tcd_type)
- continue;
+ cfs_tage_to_tail(tage, &tcd->tcd_daemon_pages);
+ tcd->tcd_cur_daemon_pages++;
- tage_to_tail(tage, &tcd->tcd_daemon_pages);
- tcd->tcd_cur_daemon_pages++;
+ if (tcd->tcd_cur_daemon_pages > tcd->tcd_max_pages) {
+ struct cfs_trace_page *victim;
- if (tcd->tcd_cur_daemon_pages > tcd->tcd_max_pages) {
- struct trace_page *victim;
-
- __LASSERT(!list_empty(&tcd->tcd_daemon_pages));
- victim = tage_from_list(tcd->tcd_daemon_pages.next);
+ __LASSERT(!list_empty(&tcd->tcd_daemon_pages));
+ victim = cfs_tage_from_list(tcd->tcd_daemon_pages.next);
__LASSERT_TAGE_INVARIANT(victim);
- list_del(&victim->linkage);
- tage_free(victim);
- tcd->tcd_cur_daemon_pages--;
- }
- }
- spin_unlock(&pc->pc_lock);
-}
-
-static void put_pages_on_daemon_list_on_cpu(void *info)
-{
- struct trace_cpu_data *tcd;
- int i;
-
- tcd_for_each_type_lock(tcd, i)
- put_pages_on_tcd_daemon_list(info, tcd);
+ list_del(&victim->linkage);
+ cfs_tage_free(victim);
+ tcd->tcd_cur_daemon_pages--;
+ }
+ }
}
static void put_pages_on_daemon_list(struct page_collection *pc)
{
- trace_call_on_all_cpus(put_pages_on_daemon_list_on_cpu, pc);
+ struct cfs_trace_cpu_data *tcd;
+ int i, cpu;
+
+ for_each_possible_cpu(cpu) {
+ cfs_tcd_for_each_type_lock(tcd, i, cpu)
+ put_pages_on_tcd_daemon_list(pc, tcd);
+ }
}
-void trace_debug_print(void)
+#ifdef LNET_DUMP_ON_PANIC
+void cfs_trace_debug_print(void)
{
- struct page_collection pc;
- struct trace_page *tage;
- struct trace_page *tmp;
-
- spin_lock_init(&pc.pc_lock);
-
- pc.pc_want_daemon_pages = 1;
- collect_pages(&pc);
- list_for_each_entry_safe(tage, tmp, &pc.pc_pages, linkage) {
- char *p, *file, *fn;
- cfs_page_t *page;
-
- __LASSERT_TAGE_INVARIANT(tage);
-
- page = tage->page;
- p = cfs_page_address(page);
- while (p < ((char *)cfs_page_address(page) + tage->used)) {
- struct ptldebug_header *hdr;
- int len;
- hdr = (void *)p;
- p += sizeof(*hdr);
- file = p;
- p += strlen(file) + 1;
- fn = p;
- p += strlen(fn) + 1;
- len = hdr->ph_len - (p - (char *)hdr);
-
- print_to_console(hdr, D_EMERG, p, len, file, fn);
-
- p += len;
- }
-
- list_del(&tage->linkage);
- tage_free(tage);
- }
+ struct page_collection pc;
+ struct cfs_trace_page *tage;
+ struct cfs_trace_page *tmp;
+
+ pc.pc_want_daemon_pages = 1;
+ collect_pages(&pc);
+ list_for_each_entry_safe(tage, tmp, &pc.pc_pages, linkage) {
+ char *p, *file, *fn;
+ struct page *page;
+
+ __LASSERT_TAGE_INVARIANT(tage);
+
+ page = tage->page;
+ p = page_address(page);
+ while (p < ((char *)page_address(page) + tage->used)) {
+ struct ptldebug_header *hdr;
+ int len;
+ hdr = (void *)p;
+ p += sizeof(*hdr);
+ file = p;
+ p += strlen(file) + 1;
+ fn = p;
+ p += strlen(fn) + 1;
+ len = hdr->ph_len - (int)(p - (char *)hdr);
+
+ cfs_print_to_console(hdr, D_EMERG, file, fn,
+ "%.*s", len, p);
+
+ p += len;
+ }
+
+ list_del(&tage->linkage);
+ cfs_tage_free(tage);
+ }
}
+#endif /* LNET_DUMP_ON_PANIC */
-int tracefile_dump_all_pages(char *filename)
+int cfs_tracefile_dump_all_pages(char *filename)
{
- struct page_collection pc;
- cfs_file_t *filp;
- struct trace_page *tage;
- struct trace_page *tmp;
- int rc;
-
- CFS_DECL_MMSPACE;
-
- tracefile_write_lock();
-
- filp = cfs_filp_open(filename,
- O_CREAT|O_EXCL|O_WRONLY|O_LARGEFILE, 0600, &rc);
- if (!filp) {
- if (rc != -EEXIST)
- printk(KERN_ERR "LustreError: can't open %s for dump: rc %d\n",
- filename, rc);
- goto out;
- }
+ struct page_collection pc;
+ struct file *filp;
+ struct cfs_trace_page *tage;
+ struct cfs_trace_page *tmp;
+ char *buf;
+ int rc;
+
+ down_write(&cfs_tracefile_sem);
+
+ filp = filp_open(filename, O_CREAT|O_EXCL|O_WRONLY|O_LARGEFILE, 0600);
+ if (IS_ERR(filp)) {
+ rc = PTR_ERR(filp);
+ filp = NULL;
+ pr_err("LustreError: can't open %s for dump: rc = %d\n",
+ filename, rc);
+ goto out;
+ }
- spin_lock_init(&pc.pc_lock);
pc.pc_want_daemon_pages = 1;
collect_pages(&pc);
- if (list_empty(&pc.pc_pages)) {
+ if (list_empty(&pc.pc_pages)) {
rc = 0;
goto close;
}
- /* ok, for now, just write the pages. in the future we'll be building
- * iobufs with the pages and calling generic_direct_IO */
- CFS_MMSPACE_OPEN;
- list_for_each_entry_safe(tage, tmp, &pc.pc_pages, linkage) {
-
- __LASSERT_TAGE_INVARIANT(tage);
-
- rc = cfs_filp_write(filp, cfs_page_address(tage->page),
- tage->used, cfs_filp_poff(filp));
- if (rc != (int)tage->used) {
- printk(KERN_WARNING "wanted to write %u but wrote "
- "%d\n", tage->used, rc);
- put_pages_back(&pc);
- __LASSERT(list_empty(&pc.pc_pages));
- break;
- }
- list_del(&tage->linkage);
- tage_free(tage);
+ /* ok, for now, just write the pages. in the future we'll be building
+ * iobufs with the pages and calling generic_direct_IO */
+ list_for_each_entry_safe(tage, tmp, &pc.pc_pages, linkage) {
+
+ __LASSERT_TAGE_INVARIANT(tage);
+
+ buf = kmap(tage->page);
+ rc = cfs_kernel_write(filp, buf, tage->used, &filp->f_pos);
+ kunmap(tage->page);
+ if (rc != (int)tage->used) {
+ pr_warn("Lustre: wanted to write %u but wrote %d\n",
+ tage->used, rc);
+ put_pages_back(&pc);
+ __LASSERT(list_empty(&pc.pc_pages));
+ break;
+ }
+ list_del(&tage->linkage);
+ cfs_tage_free(tage);
}
- CFS_MMSPACE_CLOSE;
- rc = cfs_filp_fsync(filp);
- if (rc)
- printk(KERN_ERR "sync returns %d\n", rc);
- close:
- cfs_filp_close(filp);
- out:
- tracefile_write_unlock();
- return rc;
-}
-
-void trace_flush_pages(void)
-{
- struct page_collection pc;
- struct trace_page *tage;
- struct trace_page *tmp;
- spin_lock_init(&pc.pc_lock);
-
- pc.pc_want_daemon_pages = 1;
- collect_pages(&pc);
- list_for_each_entry_safe(tage, tmp, &pc.pc_pages, linkage) {
-
- __LASSERT_TAGE_INVARIANT(tage);
-
- list_del(&tage->linkage);
- tage_free(tage);
- }
+ rc = vfs_fsync_range(filp, 0, LLONG_MAX, 1);
+ if (rc)
+ pr_err("LustreError: sync returns: rc = %d\n", rc);
+close:
+ filp_close(filp, NULL);
+out:
+ up_write(&cfs_tracefile_sem);
+ return rc;
}
-int trace_copyin_string(char *knl_buffer, int knl_buffer_nob,
- const char *usr_buffer, int usr_buffer_nob)
+void cfs_trace_flush_pages(void)
{
- int nob;
-
- if (usr_buffer_nob > knl_buffer_nob)
- return -EOVERFLOW;
-
- if (copy_from_user((void *)knl_buffer,
- (void *)usr_buffer, usr_buffer_nob))
- return -EFAULT;
-
- nob = strnlen(knl_buffer, usr_buffer_nob);
- while (nob-- >= 0) /* strip trailing whitespace */
- if (!isspace(knl_buffer[nob]))
- break;
-
- if (nob < 0) /* empty string */
- return -EINVAL;
-
- if (nob == knl_buffer_nob) /* no space to terminate */
- return -EOVERFLOW;
-
- knl_buffer[nob + 1] = 0; /* terminate */
- return 0;
+ struct page_collection pc;
+ struct cfs_trace_page *tage;
+
+ pc.pc_want_daemon_pages = 1;
+ collect_pages(&pc);
+ while (!list_empty(&pc.pc_pages)) {
+ tage = list_first_entry(&pc.pc_pages,
+ struct cfs_trace_page, linkage);
+ __LASSERT_TAGE_INVARIANT(tage);
+
+ list_del(&tage->linkage);
+ cfs_tage_free(tage);
+ }
}
-int trace_copyout_string(char *usr_buffer, int usr_buffer_nob,
- const char *knl_buffer, char *append)
+int cfs_trace_copyout_string(char __user *usr_buffer, int usr_buffer_nob,
+ const char *knl_buffer, char *append)
{
/* NB if 'append' != NULL, it's a single character to append to the
* copied out string - usually "\n", for /proc entries and "" (i.e. a
if (nob > usr_buffer_nob)
nob = usr_buffer_nob;
- if (copy_to_user(usr_buffer, knl_buffer, nob))
+ if (copy_to_user(usr_buffer, knl_buffer, nob))
return -EFAULT;
if (append != NULL && nob < usr_buffer_nob) {
- if (copy_to_user(usr_buffer + nob, append, 1))
+ if (copy_to_user(usr_buffer + nob, append, 1))
return -EFAULT;
nob++;
return nob;
}
+EXPORT_SYMBOL(cfs_trace_copyout_string);
-int trace_allocate_string_buffer(char **str, int nob)
+int cfs_trace_allocate_string_buffer(char **str, int nob)
{
- if (nob > 2 * CFS_PAGE_SIZE) /* string must be "sensible" */
+ if (nob > 2 * PAGE_SIZE) /* string must be "sensible" */
return -EINVAL;
- *str = cfs_alloc(nob, CFS_ALLOC_STD | CFS_ALLOC_ZERO);
+ *str = kmalloc(nob, GFP_KERNEL | __GFP_ZERO);
if (*str == NULL)
return -ENOMEM;
return 0;
}
-void trace_free_string_buffer(char *str, int nob)
+int cfs_trace_dump_debug_buffer_usrstr(void __user *usr_str, int usr_str_nob)
{
- cfs_free(str);
-}
-
-int trace_dump_debug_buffer_usrstr(void *usr_str, int usr_str_nob)
-{
- char *str;
- int rc;
+ char *str;
+ char *path;
+ int rc;
- rc = trace_allocate_string_buffer(&str, usr_str_nob + 1);
- if (rc != 0)
- return rc;
+ str = memdup_user_nul(usr_str, usr_str_nob);
+ if (!str)
+ return -ENOMEM;
- rc = trace_copyin_string(str, usr_str_nob + 1,
- usr_str, usr_str_nob);
- if (rc != 0)
- goto out;
+ path = strim(str);
+ if (path[0] != '/')
+ rc = -EINVAL;
+ else
+ rc = cfs_tracefile_dump_all_pages(path);
+ kfree(str);
-#if !defined(__WINNT__)
- if (str[0] != '/') {
- rc = -EINVAL;
- goto out;
- }
-#endif
- rc = tracefile_dump_all_pages(str);
-out:
- trace_free_string_buffer(str, usr_str_nob + 1);
- return rc;
+ return rc;
}
-int trace_daemon_command(char *str)
+int cfs_trace_daemon_command(char *str)
{
int rc = 0;
- tracefile_write_lock();
+ down_write(&cfs_tracefile_sem);
- if (strcmp(str, "stop") == 0) {
- trace_stop_thread();
- memset(tracefile, 0, sizeof(tracefile));
+ if (strcmp(str, "stop") == 0) {
+ up_write(&cfs_tracefile_sem);
+ cfs_trace_stop_thread();
+ down_write(&cfs_tracefile_sem);
+ memset(cfs_tracefile, 0, sizeof(cfs_tracefile));
} else if (strncmp(str, "size=", 5) == 0) {
- tracefile_size = simple_strtoul(str + 5, NULL, 0);
- if (tracefile_size < 10 || tracefile_size > 20480)
- tracefile_size = TRACEFILE_SIZE;
- else
- tracefile_size <<= 20;
-
- } else if (strlen(str) >= sizeof(tracefile)) {
+ unsigned long tmp;
+
+ rc = kstrtoul(str + 5, 10, &tmp);
+ if (!rc) {
+ if (tmp < 10 || tmp > 20480)
+ cfs_tracefile_size = CFS_TRACEFILE_SIZE;
+ else
+ cfs_tracefile_size = tmp << 20;
+ }
+ } else if (strlen(str) >= sizeof(cfs_tracefile)) {
rc = -ENAMETOOLONG;
-#ifndef __WINNT__
} else if (str[0] != '/') {
rc = -EINVAL;
-#endif
} else {
- strcpy(tracefile, str);
+ strcpy(cfs_tracefile, str);
- printk(KERN_INFO "Lustre: debug daemon will attempt to start writing "
- "to %s (%lukB max)\n", tracefile,
- (long)(tracefile_size >> 10));
+ pr_info("Lustre: debug daemon will attempt to start writing to %s (%lukB max)\n",
+ cfs_tracefile, (long)(cfs_tracefile_size >> 10));
- trace_start_thread();
+ cfs_trace_start_thread();
}
- tracefile_write_unlock();
- return rc;
+ up_write(&cfs_tracefile_sem);
+ return rc;
}
-int trace_daemon_command_usrstr(void *usr_str, int usr_str_nob)
+int cfs_trace_daemon_command_usrstr(void __user *usr_str, int usr_str_nob)
{
char *str;
int rc;
- rc = trace_allocate_string_buffer(&str, usr_str_nob + 1);
- if (rc != 0)
- return rc;
+ str = memdup_user_nul(usr_str, usr_str_nob);
+ if (!str)
+ return -ENOMEM;
- rc = trace_copyin_string(str, usr_str_nob + 1,
- usr_str, usr_str_nob);
- if (rc == 0)
- rc = trace_daemon_command(str);
+ rc = cfs_trace_daemon_command(strim(str));
+ kfree(str);
- trace_free_string_buffer(str, usr_str_nob + 1);
return rc;
}
-int trace_set_debug_mb(int mb)
+int cfs_trace_set_debug_mb(int mb)
{
int i;
- int j;
- int pages;
- int limit = trace_max_debug_mb();
- struct trace_cpu_data *tcd;
-
- if (mb < num_possible_cpus())
- return -EINVAL;
+ int j;
+ unsigned long pages;
+ unsigned long total_mb = (cfs_totalram_pages() >> (20 - PAGE_SHIFT));
+ unsigned long limit = max_t(unsigned long, 512, (total_mb * 4) / 5);
+ struct cfs_trace_cpu_data *tcd;
+
+ if (mb < num_possible_cpus()) {
+ pr_warn("Lustre: %d MB is too small for debug buffer size, setting it to %d MB.\n",
+ mb, num_possible_cpus());
+ mb = num_possible_cpus();
+ }
if (mb > limit) {
- printk(KERN_ERR "Lustre: Refusing to set debug buffer size to "
- "%dMB - limit is %d\n", mb, limit);
- return -EINVAL;
+ pr_warn("Lustre: %d MB is too large for debug buffer size, setting it to %lu MB.\n",
+ mb, limit);
+ mb = limit;
}
mb /= num_possible_cpus();
- pages = mb << (20 - CFS_PAGE_SHIFT);
+ pages = mb << (20 - PAGE_SHIFT);
- tracefile_write_lock();
+ down_write(&cfs_tracefile_sem);
- tcd_for_each(tcd, i, j)
+ cfs_tcd_for_each(tcd, i, j)
tcd->tcd_max_pages = (pages * tcd->tcd_pages_factor) / 100;
- tracefile_write_unlock();
+ up_write(&cfs_tracefile_sem);
- return 0;
+ return mb;
}
-int trace_set_debug_mb_usrstr(void *usr_str, int usr_str_nob)
+int cfs_trace_get_debug_mb(void)
{
- char str[32];
- int rc;
-
- rc = trace_copyin_string(str, sizeof(str), usr_str, usr_str_nob);
- if (rc < 0)
- return rc;
-
- return trace_set_debug_mb(simple_strtoul(str, NULL, 0));
-}
-
-int trace_get_debug_mb(void)
-{
- int i;
+ int i;
int j;
- struct trace_cpu_data *tcd;
+ struct cfs_trace_cpu_data *tcd;
int total_pages = 0;
- tracefile_read_lock();
+ down_read(&cfs_tracefile_sem);
- tcd_for_each(tcd, i, j)
+ cfs_tcd_for_each(tcd, i, j)
total_pages += tcd->tcd_max_pages;
- tracefile_read_unlock();
+ up_read(&cfs_tracefile_sem);
- return (total_pages >> (20 - CFS_PAGE_SHIFT)) + 1;
+ return (total_pages >> (20 - PAGE_SHIFT)) + 1;
}
static int tracefiled(void *arg)
{
- struct page_collection pc;
- struct tracefiled_ctl *tctl = arg;
- struct trace_page *tage;
- struct trace_page *tmp;
- struct ptldebug_header *hdr;
- cfs_file_t *filp;
- int rc;
-
- CFS_DECL_MMSPACE;
-
- /* we're started late enough that we pick up init's fs context */
- /* this is so broken in uml? what on earth is going on? */
- cfs_daemonize("ktracefiled");
-
- spin_lock_init(&pc.pc_lock);
- complete(&tctl->tctl_start);
-
- while (1) {
- cfs_waitlink_t __wait;
-
- cfs_waitlink_init(&__wait);
- cfs_waitq_add(&tctl->tctl_waitq, &__wait);
- set_current_state(TASK_INTERRUPTIBLE);
- cfs_waitq_timedwait(&__wait, CFS_TASK_INTERRUPTIBLE,
- cfs_time_seconds(1));
- cfs_waitq_del(&tctl->tctl_waitq, &__wait);
-
- if (atomic_read(&tctl->tctl_shutdown))
- break;
-
- pc.pc_want_daemon_pages = 0;
- collect_pages(&pc);
- if (list_empty(&pc.pc_pages))
- continue;
-
- filp = NULL;
- tracefile_read_lock();
- if (tracefile[0] != 0) {
- filp = cfs_filp_open(tracefile,
- O_CREAT | O_RDWR | O_LARGEFILE,
- 0600, &rc);
- if (!(filp))
- printk(KERN_WARNING "couldn't open %s: %d\n",
- tracefile, rc);
- }
- tracefile_read_unlock();
- if (filp == NULL) {
- put_pages_on_daemon_list(&pc);
- __LASSERT(list_empty(&pc.pc_pages));
- continue;
- }
-
- CFS_MMSPACE_OPEN;
-
- /* mark the first header, so we can sort in chunks */
- tage = tage_from_list(pc.pc_pages.next);
- __LASSERT_TAGE_INVARIANT(tage);
-
- hdr = cfs_page_address(tage->page);
- hdr->ph_flags |= PH_FLAG_FIRST_RECORD;
-
- list_for_each_entry_safe(tage, tmp, &pc.pc_pages, linkage) {
- static loff_t f_pos;
-
- __LASSERT_TAGE_INVARIANT(tage);
-
- if (f_pos >= (off_t)tracefile_size)
- f_pos = 0;
- else if (f_pos > cfs_filp_size(filp))
- f_pos = cfs_filp_size(filp);
-
- rc = cfs_filp_write(filp, cfs_page_address(tage->page),
- tage->used, &f_pos);
- if (rc != (int)tage->used) {
- printk(KERN_WARNING "wanted to write %u but "
- "wrote %d\n", tage->used, rc);
- put_pages_back(&pc);
- __LASSERT(list_empty(&pc.pc_pages));
- }
- }
- CFS_MMSPACE_CLOSE;
-
- cfs_filp_close(filp);
- put_pages_on_daemon_list(&pc);
- __LASSERT(list_empty(&pc.pc_pages));
- }
- complete(&tctl->tctl_stop);
- return 0;
+ struct page_collection pc;
+ struct tracefiled_ctl *tctl = arg;
+ struct cfs_trace_page *tage;
+ struct cfs_trace_page *tmp;
+ struct file *filp;
+ char *buf;
+ int last_loop = 0;
+ int rc;
+
+ /* we're started late enough that we pick up init's fs context */
+ /* this is so broken in uml? what on earth is going on? */
+
+ complete(&tctl->tctl_start);
+
+ pc.pc_want_daemon_pages = 0;
+
+ while (!last_loop) {
+ wait_event_timeout(tctl->tctl_waitq,
+ ({ collect_pages(&pc);
+ !list_empty(&pc.pc_pages); }) ||
+ atomic_read(&tctl->tctl_shutdown),
+ cfs_time_seconds(1));
+ if (atomic_read(&tctl->tctl_shutdown))
+ last_loop = 1;
+ if (list_empty(&pc.pc_pages))
+ continue;
+
+ filp = NULL;
+ down_read(&cfs_tracefile_sem);
+ if (cfs_tracefile[0] != 0) {
+ filp = filp_open(cfs_tracefile,
+ O_CREAT | O_RDWR | O_LARGEFILE,
+ 0600);
+ if (IS_ERR(filp)) {
+ rc = PTR_ERR(filp);
+ filp = NULL;
+ pr_warn("Lustre: couldn't open %s: rc = %d\n",
+ cfs_tracefile, rc);
+ }
+ }
+ up_read(&cfs_tracefile_sem);
+ if (filp == NULL) {
+ put_pages_on_daemon_list(&pc);
+ __LASSERT(list_empty(&pc.pc_pages));
+ continue;
+ }
+
+ list_for_each_entry_safe(tage, tmp, &pc.pc_pages, linkage) {
+ struct dentry *de = file_dentry(filp);
+ static loff_t f_pos;
+
+ __LASSERT_TAGE_INVARIANT(tage);
+
+ if (f_pos >= (off_t)cfs_tracefile_size)
+ f_pos = 0;
+ else if (f_pos > i_size_read(de->d_inode))
+ f_pos = i_size_read(de->d_inode);
+
+ buf = kmap(tage->page);
+ rc = cfs_kernel_write(filp, buf, tage->used, &f_pos);
+ kunmap(tage->page);
+ if (rc != (int)tage->used) {
+ pr_warn("Lustre: wanted to write %u but wrote %d\n",
+ tage->used, rc);
+ put_pages_back(&pc);
+ __LASSERT(list_empty(&pc.pc_pages));
+ break;
+ }
+ }
+
+ filp_close(filp, NULL);
+ put_pages_on_daemon_list(&pc);
+ if (!list_empty(&pc.pc_pages)) {
+ int i;
+
+ pr_alert("Lustre: trace pages aren't empty\n");
+ pr_err("Lustre: total cpus(%d): ", num_possible_cpus());
+ for (i = 0; i < num_possible_cpus(); i++)
+ if (cpu_online(i))
+ pr_cont("%d(on) ", i);
+ else
+ pr_cont("%d(off) ", i);
+ pr_cont("\n");
+
+ i = 0;
+ list_for_each_entry_safe(tage, tmp, &pc.pc_pages,
+ linkage)
+ pr_err("Lustre: page %d belongs to cpu %d\n",
+ ++i, tage->cpu);
+ pr_err("Lustre: There are %d pages unwritten\n", i);
+ }
+ __LASSERT(list_empty(&pc.pc_pages));
+ }
+ complete(&tctl->tctl_stop);
+ return 0;
}
-int trace_start_thread(void)
+int cfs_trace_start_thread(void)
{
struct tracefiled_ctl *tctl = &trace_tctl;
int rc = 0;
- mutex_down(&trace_thread_sem);
+ mutex_lock(&cfs_trace_thread_mutex);
if (thread_running)
goto out;
- init_completion(&tctl->tctl_start);
- init_completion(&tctl->tctl_stop);
- cfs_waitq_init(&tctl->tctl_waitq);
- atomic_set(&tctl->tctl_shutdown, 0);
+ init_completion(&tctl->tctl_start);
+ init_completion(&tctl->tctl_stop);
+ init_waitqueue_head(&tctl->tctl_waitq);
+ atomic_set(&tctl->tctl_shutdown, 0);
- if (cfs_kernel_thread(tracefiled, tctl, 0) < 0) {
- rc = -ECHILD;
- goto out;
- }
+ if (IS_ERR(kthread_run(tracefiled, tctl, "ktracefiled"))) {
+ rc = -ECHILD;
+ goto out;
+ }
- wait_for_completion(&tctl->tctl_start);
- thread_running = 1;
+ wait_for_completion(&tctl->tctl_start);
+ thread_running = 1;
out:
- mutex_up(&trace_thread_sem);
+ mutex_unlock(&cfs_trace_thread_mutex);
return rc;
}
-void trace_stop_thread(void)
+void cfs_trace_stop_thread(void)
{
- struct tracefiled_ctl *tctl = &trace_tctl;
-
- mutex_down(&trace_thread_sem);
- if (thread_running) {
- printk(KERN_INFO "Lustre: shutting down debug daemon thread...\n");
- atomic_set(&tctl->tctl_shutdown, 1);
- wait_for_completion(&tctl->tctl_stop);
- thread_running = 0;
- }
- mutex_up(&trace_thread_sem);
+ struct tracefiled_ctl *tctl = &trace_tctl;
+
+ mutex_lock(&cfs_trace_thread_mutex);
+ if (thread_running) {
+ pr_info("Lustre: shutting down debug daemon thread...\n");
+ atomic_set(&tctl->tctl_shutdown, 1);
+ wait_for_completion(&tctl->tctl_stop);
+ thread_running = 0;
+ }
+ mutex_unlock(&cfs_trace_thread_mutex);
}
-int tracefile_init(int max_pages)
-{
- struct trace_cpu_data *tcd;
- int i;
- int j;
- int rc;
- int factor;
-
- rc = tracefile_init_arch();
- if (rc != 0)
- return rc;
-
- tcd_for_each(tcd, i, j) {
- /* tcd_pages_factor is initialized int tracefile_init_arch. */
- factor = tcd->tcd_pages_factor;
- CFS_INIT_LIST_HEAD(&tcd->tcd_pages);
- CFS_INIT_LIST_HEAD(&tcd->tcd_stock_pages);
- CFS_INIT_LIST_HEAD(&tcd->tcd_daemon_pages);
- tcd->tcd_cur_pages = 0;
- tcd->tcd_cur_stock_pages = 0;
- tcd->tcd_cur_daemon_pages = 0;
- tcd->tcd_max_pages = (max_pages * factor) / 100;
- LASSERT(tcd->tcd_max_pages > 0);
- tcd->tcd_shutting_down = 0;
- }
-
- return 0;
-}
+/* percents to share the total debug memory for each type */
+static unsigned int pages_factor[CFS_TCD_TYPE_CNT] = {
+ 80, /* 80% pages for CFS_TCD_TYPE_PROC */
+ 10, /* 10% pages for CFS_TCD_TYPE_SOFTIRQ */
+ 10 /* 10% pages for CFS_TCD_TYPE_IRQ */
+};
-static void trace_cleanup_on_cpu(void *info)
+int cfs_tracefile_init(int max_pages)
{
- struct trace_cpu_data *tcd;
- struct trace_page *tage;
- struct trace_page *tmp;
- int i;
+ struct cfs_trace_cpu_data *tcd;
+ int i;
+ int j;
+
+ /* initialize trace_data */
+ memset(cfs_trace_data, 0, sizeof(cfs_trace_data));
+ for (i = 0; i < CFS_TCD_TYPE_CNT; i++) {
+ cfs_trace_data[i] =
+ kmalloc_array(num_possible_cpus(),
+ sizeof(union cfs_trace_data_union),
+ GFP_KERNEL);
+ if (!cfs_trace_data[i])
+ goto out_trace_data;
+ }
- tcd_for_each_type_lock(tcd, i) {
- tcd->tcd_shutting_down = 1;
+ /* arch related info initialized */
+ cfs_tcd_for_each(tcd, i, j) {
+ int factor = pages_factor[i];
+
+ spin_lock_init(&tcd->tcd_lock);
+ tcd->tcd_pages_factor = factor;
+ tcd->tcd_type = i;
+ tcd->tcd_cpu = j;
+
+ INIT_LIST_HEAD(&tcd->tcd_pages);
+ INIT_LIST_HEAD(&tcd->tcd_stock_pages);
+ INIT_LIST_HEAD(&tcd->tcd_daemon_pages);
+ tcd->tcd_cur_pages = 0;
+ tcd->tcd_cur_stock_pages = 0;
+ tcd->tcd_cur_daemon_pages = 0;
+ tcd->tcd_max_pages = (max_pages * factor) / 100;
+ LASSERT(tcd->tcd_max_pages > 0);
+ tcd->tcd_shutting_down = 0;
+ }
- list_for_each_entry_safe(tage, tmp, &tcd->tcd_pages, linkage) {
- __LASSERT_TAGE_INVARIANT(tage);
+ return 0;
- list_del(&tage->linkage);
- tage_free(tage);
- }
- tcd->tcd_cur_pages = 0;
- }
+out_trace_data:
+ for (i = 0; cfs_trace_data[i]; i++) {
+ kfree(cfs_trace_data[i]);
+ cfs_trace_data[i] = NULL;
+ }
+ pr_err("lnet: Not enough memory\n");
+ return -ENOMEM;
}
-static void trace_cleanup(void)
+static void trace_cleanup_on_all_cpus(void)
{
- struct page_collection pc;
+ struct cfs_trace_cpu_data *tcd;
+ struct cfs_trace_page *tage;
+ int i, cpu;
+
+ for_each_possible_cpu(cpu) {
+ cfs_tcd_for_each_type_lock(tcd, i, cpu) {
+ if (!tcd->tcd_pages_factor)
+ /* Not initialised */
+ continue;
+ tcd->tcd_shutting_down = 1;
+
+ while (!list_empty(&tcd->tcd_pages)) {
+ tage = list_first_entry(&tcd->tcd_pages,
+ struct cfs_trace_page,
+ linkage);
+ __LASSERT_TAGE_INVARIANT(tage);
+
+ list_del(&tage->linkage);
+ cfs_tage_free(tage);
+ }
+ tcd->tcd_cur_pages = 0;
+ }
+ }
+}
+
+static void cfs_trace_cleanup(void)
+{
+ struct page_collection pc;
+ int i;
- CFS_INIT_LIST_HEAD(&pc.pc_pages);
- spin_lock_init(&pc.pc_lock);
+ INIT_LIST_HEAD(&pc.pc_pages);
- trace_call_on_all_cpus(trace_cleanup_on_cpu, &pc);
+ trace_cleanup_on_all_cpus();
- tracefile_fini_arch();
+ for (i = 0; i < CFS_TCD_TYPE_CNT && cfs_trace_data[i]; i++) {
+ kfree(cfs_trace_data[i]);
+ cfs_trace_data[i] = NULL;
+ }
}
-void tracefile_exit(void)
+void cfs_tracefile_exit(void)
{
- trace_stop_thread();
- trace_cleanup();
+ cfs_trace_stop_thread();
+ cfs_trace_cleanup();
}
git://git.whamcloud.com / fs / lustre-release.git / blobdiff