mirror of
https://github.com/libguestfs/libguestfs.git
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bf80587367
I suspected data corruption (but didn't prove it). This commit just adds some magic numbers to the structs so we will see data corruption quickly if it happens again.
109 lines
3.4 KiB
C
109 lines
3.4 KiB
C
/* libguestfs
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* Copyright (C) 2016 Red Hat Inc.
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License along
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* with this program; if not, write to the Free Software Foundation, Inc.,
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* 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
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*/
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#ifndef GUESTFS_BOOT_ANALYSIS_H_
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#define GUESTFS_BOOT_ANALYSIS_H_
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#define NR_WARMUP_PASSES 3
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#define NR_TEST_PASSES 5
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/* Per-pass data collected. */
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struct pass_data {
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#define PASS_MAGIC 0x45545545
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uint32_t magic; /* Struct magic. */
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size_t pass;
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struct timespec start_t;
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struct timespec end_t;
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int64_t elapsed_ns;
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/* Array of timestamped events. */
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size_t nr_events;
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struct event *events;
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/* Was the previous appliance log message incomplete? If so, this
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* contains the index of that incomplete message in the events
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* array.
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*/
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ssize_t incomplete_log_message;
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/* Have we seen the launch event yet? We don't record events until
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* this one has been received. This makes it easy to base the
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* timeline at event 0.
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*/
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int seen_launch;
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};
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/* The 'source' field in the event is a guestfs event
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* (GUESTFS_EVENT_*). We also wish to encode libvirt as a source, so
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* we use a magic/impossible value for that here. Note that events
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* are bitmasks, and normally no more than one bit may be set.
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*/
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#define SOURCE_LIBVIRT ((uint64_t)~0)
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extern char *source_to_string (uint64_t source);
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struct event {
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struct timespec t;
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uint64_t source;
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char *message;
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};
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extern struct pass_data pass_data[NR_TEST_PASSES];
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/* The final timeline consisting of various activities starting and
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* ending. We're interested in when the activities start, and how
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* long they take (mean, variance, standard deviation of length).
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*/
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struct activity {
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#define ACTIVITY_MAGIC 0xAC1AC1AC
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uint32_t magic; /* Struct magic. */
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char *name; /* Name of this activity. */
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int flags;
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#define LONG_ACTIVITY 1 /* Expected to take a long time. */
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/* For each pass, record the actual start & end events of this
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* activity.
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*/
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size_t start_event[NR_TEST_PASSES];
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size_t end_event[NR_TEST_PASSES];
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double t; /* Start (ns offset). */
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double end_t; /* t + mean - 1 */
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/* Length of this activity. */
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double mean; /* Mean time elapsed (ns). */
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double variance; /* Variance. */
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double sd; /* Standard deviation. */
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double percent; /* Percent of total elapsed time. */
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int warning; /* Appears in red. */
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};
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extern size_t nr_activities;
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extern struct activity *activities;
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extern int activity_exists (const char *name);
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extern struct activity *add_activity (const char *name, int flags);
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extern struct activity *find_activity (const char *name);
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extern int activity_exists_with_no_data (const char *name, size_t pass);
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extern void construct_timeline (void);
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#endif /* GUESTFS_BOOT_ANALYSIS_H_ */
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