blob: 9a6637d1b713c2b6e81d34ed00abd3cf317eff5a [file] [log] [blame]
Ken Sumrallb87937c2013-03-19 21:46:39 -07001/*
2 * Copyright (C) 2013 The Android Open Source Project
3 *
4 * Licensed under the Apache License, Version 2.0 (the "License");
5 * you may not use this file except in compliance with the License.
6 * You may obtain a copy of the License at
7 *
8 * http://www.apache.org/licenses/LICENSE-2.0
9 *
10 * Unless required by applicable law or agreed to in writing, software
11 * distributed under the License is distributed on an "AS IS" BASIS,
12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
13 * See the License for the specific language governing permissions and
14 * limitations under the License.
15 */
16
17#include <sys/types.h>
18#include <sys/stat.h>
19#include <fcntl.h>
20#include <unistd.h>
21#include <sys/ioctl.h>
22#include <string.h>
23#include <limits.h>
24#include <linux/fs.h>
Ken Sumrallbc7d5082013-05-07 17:28:21 -070025#include <time.h>
Ken Sumrallb87937c2013-03-19 21:46:39 -070026#include <fs_mgr.h>
Ken Sumrall743a5ec2013-04-22 18:43:28 -070027#include <pthread.h>
Ken Sumrallb87937c2013-03-19 21:46:39 -070028#define LOG_TAG "fstrim"
29#include "cutils/log.h"
Ken Sumralle78cd4f2013-05-01 23:34:57 -070030#include "hardware_legacy/power.h"
31
Ken Sumrallbc7d5082013-05-07 17:28:21 -070032/* These numbers must match what the MountService specified in
33 * frameworks/base/services/java/com/android/server/EventLogTags.logtags
34 */
35#define LOG_FSTRIM_START 2755
36#define LOG_FSTRIM_FINISH 2756
37
Ken Sumralle78cd4f2013-05-01 23:34:57 -070038#define FSTRIM_WAKELOCK "dofstrim"
Ken Sumrallb87937c2013-03-19 21:46:39 -070039
Mark Salyzyn5eecc442014-02-12 14:16:14 -080040#define UNUSED __attribute__((unused))
41
Ken Sumrallbc7d5082013-05-07 17:28:21 -070042static unsigned long long get_boot_time_ms(void)
43{
44 struct timespec t;
45 unsigned long long time_ms;
46
47 t.tv_sec = 0;
48 t.tv_nsec = 0;
49 clock_gettime(CLOCK_BOOTTIME, &t);
50 time_ms = (t.tv_sec * 1000LL) + (t.tv_nsec / 1000000);
51
52 return time_ms;
53}
54
Mark Salyzyn5eecc442014-02-12 14:16:14 -080055static void *do_fstrim_filesystems(void *ignored UNUSED)
Ken Sumrallb87937c2013-03-19 21:46:39 -070056{
57 int i;
58 int fd;
59 int ret = 0;
60 struct fstrim_range range = { 0 };
61 struct stat sb;
62 extern struct fstab *fstab;
63
64 SLOGI("Starting fstrim work...\n");
65
Ken Sumrallbc7d5082013-05-07 17:28:21 -070066 /* Log the start time in the event log */
67 LOG_EVENT_LONG(LOG_FSTRIM_START, get_boot_time_ms());
68
Ken Sumrallb87937c2013-03-19 21:46:39 -070069 for (i = 0; i < fstab->num_entries; i++) {
70 /* Skip raw partitions */
71 if (!strcmp(fstab->recs[i].fs_type, "emmc") ||
72 !strcmp(fstab->recs[i].fs_type, "mtd")) {
73 continue;
74 }
75 /* Skip read-only filesystems */
76 if (fstab->recs[i].flags & MS_RDONLY) {
77 continue;
78 }
79 if (fs_mgr_is_voldmanaged(&fstab->recs[i])) {
80 continue; /* Should we trim fat32 filesystems? */
81 }
82
83 if (stat(fstab->recs[i].mount_point, &sb) == -1) {
84 SLOGE("Cannot stat mount point %s\n", fstab->recs[i].mount_point);
85 ret = -1;
86 continue;
87 }
88 if (!S_ISDIR(sb.st_mode)) {
89 SLOGE("%s is not a directory\n", fstab->recs[i].mount_point);
90 ret = -1;
91 continue;
92 }
93
94 fd = open(fstab->recs[i].mount_point, O_RDONLY);
95 if (fd < 0) {
96 SLOGE("Cannot open %s for FITRIM\n", fstab->recs[i].mount_point);
97 ret = -1;
98 continue;
99 }
100
101 memset(&range, 0, sizeof(range));
102 range.len = ULLONG_MAX;
103 SLOGI("Invoking FITRIM ioctl on %s", fstab->recs[i].mount_point);
104 if (ioctl(fd, FITRIM, &range)) {
105 SLOGE("FITRIM ioctl failed on %s", fstab->recs[i].mount_point);
106 ret = -1;
Ken Sumrall2c4b5632013-04-29 19:17:56 -0700107 } else {
108 SLOGI("Trimmed %llu bytes on %s\n", range.len, fstab->recs[i].mount_point);
Ken Sumrallb87937c2013-03-19 21:46:39 -0700109 }
Ken Sumrallb87937c2013-03-19 21:46:39 -0700110 close(fd);
111 }
Ken Sumrallbc7d5082013-05-07 17:28:21 -0700112
113 /* Log the finish time in the event log */
114 LOG_EVENT_LONG(LOG_FSTRIM_FINISH, get_boot_time_ms());
115
Ken Sumrallb87937c2013-03-19 21:46:39 -0700116 SLOGI("Finished fstrim work.\n");
117
Ken Sumralle78cd4f2013-05-01 23:34:57 -0700118 /* Release the wakelock that let us work */
119 release_wake_lock(FSTRIM_WAKELOCK);
120
Colin Cross346c5b22014-01-22 23:59:41 -0800121 return (void *)(uintptr_t)ret;
Ken Sumrallb87937c2013-03-19 21:46:39 -0700122}
123
Ken Sumrall743a5ec2013-04-22 18:43:28 -0700124int fstrim_filesystems(void)
125{
126 pthread_t t;
127 int ret;
128
Ken Sumralle78cd4f2013-05-01 23:34:57 -0700129 /* Get a wakelock as this may take a while, and we don't want the
130 * device to sleep on us.
131 */
132 acquire_wake_lock(PARTIAL_WAKE_LOCK, FSTRIM_WAKELOCK);
133
Ken Sumrall743a5ec2013-04-22 18:43:28 -0700134 /* Depending on the emmc chip and size, this can take upwards
135 * of a few minutes. If done in the same thread as the caller
136 * of this function, that would block vold from accepting any
137 * commands until the trim is finished. So start another thread
138 * to do the work, and return immediately.
139 *
140 * This function should not be called more than once per day, but
141 * even if it is called a second time before the first one finishes,
142 * the kernel will "do the right thing" and split the work between
143 * the two ioctls invoked in separate threads.
144 */
145 ret = pthread_create(&t, NULL, do_fstrim_filesystems, NULL);
146 if (ret) {
147 SLOGE("Cannot create thread to do fstrim");
148 return ret;
149 }
150
151 ret = pthread_detach(t);
152 if (ret) {
153 SLOGE("Cannot detach thread doing fstrim");
154 return ret;
155 }
156
157 return 0;
158}