#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 cfs_trace_data_union (*cfs_trace_data[TCD_MAX_TYPES])[NR_CPUS] __cacheline_aligned;
+char *cfs_trace_console_buffers[NR_CPUS][CFS_TCD_TYPE_MAX];
char cfs_tracefile[TRACEFILE_NAME_SIZE];
long long cfs_tracefile_size = CFS_TRACEFILE_SIZE;
static struct tracefiled_ctl trace_tctl;
(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 inline struct cfs_trace_cpu_data *
cfs_trace_get_tcd(void)
{
put_cpu();
}
+/* percents to share the total debug memory for each type */
+static unsigned int pages_factor[CFS_TCD_TYPE_MAX] = {
+ 80, /* 80% pages for CFS_TCD_TYPE_PROC */
+ 10, /* 10% pages for CFS_TCD_TYPE_SOFTIRQ */
+ 10 /* 10% pages for CFS_TCD_TYPE_IRQ */
+};
+
+int cfs_tracefile_init_arch(void)
+{
+ 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_MAX; 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;
+ }
+
+ /* arch related info initialized */
+ cfs_tcd_for_each(tcd, i, j) {
+ spin_lock_init(&tcd->tcd_lock);
+ tcd->tcd_pages_factor = pages_factor[i];
+ tcd->tcd_type = i;
+ tcd->tcd_cpu = j;
+ }
+
+ for (i = 0; i < num_possible_cpus(); i++)
+ for (j = 0; j < 3; j++) {
+ cfs_trace_console_buffers[i][j] =
+ kmalloc(CFS_TRACE_CONSOLE_BUFFER_SIZE,
+ GFP_KERNEL);
+
+ if (!cfs_trace_console_buffers[i][j])
+ goto out_buffers;
+ }
+
+ return 0;
+
+out_buffers:
+ for (i = 0; i < num_possible_cpus(); i++)
+ for (j = 0; j < 3; j++) {
+ kfree(cfs_trace_console_buffers[i][j]);
+ cfs_trace_console_buffers[i][j] = NULL;
+ }
+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;
+}
+
+void cfs_tracefile_fini_arch(void)
+{
+ int i;
+ int j;
+
+ for (i = 0; i < num_possible_cpus(); i++)
+ for (j = 0; j < 3; j++) {
+ kfree(cfs_trace_console_buffers[i][j]);
+ cfs_trace_console_buffers[i][j] = NULL;
+ }
+
+ for (i = 0; cfs_trace_data[i]; i++) {
+ kfree(cfs_trace_data[i]);
+ cfs_trace_data[i] = NULL;
+ }
+}
+
static inline struct cfs_trace_page *
cfs_tage_from_list(struct list_head *list)
{
return tage;
}
+static void cfs_set_ptldebug_header(struct ptldebug_header *header,
+ struct libcfs_debug_msg_data *msgdata,
+ unsigned long stack)
+{
+ struct timespec64 ts;
+
+ ktime_get_real_ts64(&ts);
+
+ 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;
+}
+
+/**
+ * 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);
+}
+
+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);
+}
+
+static void cfs_print_to_console(struct ptldebug_header *hdr, int mask,
+ const char *buf, int len, 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: %.*s", prefix, len, buf);
+ else if (mask & D_ERROR)
+ pr_err("%sError: %.*s", prefix, len, buf);
+ else if (mask & D_WARNING)
+ pr_warn("%s: %.*s", prefix, len, buf);
+ else if (mask & libcfs_printk)
+ pr_info("%s: %.*s", prefix, len, buf);
+ } else {
+ if (mask & D_EMERG)
+ pr_emerg("%sError: %d:%d:(%s:%d:%s()) %.*s", prefix,
+ hdr->ph_pid, hdr->ph_extern_pid, file,
+ hdr->ph_line_num, fn, len, buf);
+ else if (mask & D_ERROR)
+ pr_err("%sError: %d:%d:(%s:%d:%s()) %.*s", prefix,
+ hdr->ph_pid, hdr->ph_extern_pid, file,
+ hdr->ph_line_num, fn, len, buf);
+ else if (mask & D_WARNING)
+ pr_warn("%s: %d:%d:(%s:%d:%s()) %.*s", prefix,
+ hdr->ph_pid, hdr->ph_extern_pid, file,
+ hdr->ph_line_num, fn, len, buf);
+ else if (mask & (D_CONSOLE | libcfs_printk))
+ pr_info("%s: %.*s", prefix, len, buf);
+ }
+
+ if (mask & D_TTY)
+ cfs_tty_write_message(prefix, mask, buf);
+}
+
int libcfs_debug_msg(struct libcfs_debug_msg_data *msgdata,
const char *format, ...)
{
git://git.whamcloud.com / fs / lustre-release.git / blobdiff