| /* |
| * Copyright (C) 2011 STRATO. 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 v2 as published by the Free Software Foundation. |
| * |
| * This program is distributed in the hope that it will 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 to the |
| * Free Software Foundation, Inc., 59 Temple Place - Suite 330, |
| * Boston, MA 021110-1307, USA. |
| */ |
| |
| #include "kerncompat.h" |
| #include "androidcompat.h" |
| |
| #include <sys/ioctl.h> |
| #include <sys/wait.h> |
| #include <sys/stat.h> |
| #include <sys/types.h> |
| #include <sys/socket.h> |
| #include <sys/un.h> |
| #include <sys/syscall.h> |
| #include <poll.h> |
| #include <sys/file.h> |
| #include <uuid/uuid.h> |
| #include <fcntl.h> |
| #include <unistd.h> |
| #include <pthread.h> |
| #include <ctype.h> |
| #include <signal.h> |
| #include <stdarg.h> |
| #include <limits.h> |
| |
| #include "ctree.h" |
| #include "ioctl.h" |
| #include "utils.h" |
| #include "volumes.h" |
| #include "disk-io.h" |
| |
| #include "commands.h" |
| |
| static const char * const scrub_cmd_group_usage[] = { |
| "btrfs scrub <command> [options] <path>|<device>", |
| NULL |
| }; |
| |
| #define SCRUB_DATA_FILE "/var/lib/btrfs/scrub.status" |
| #define SCRUB_PROGRESS_SOCKET_PATH "/var/lib/btrfs/scrub.progress" |
| #define SCRUB_FILE_VERSION_PREFIX "scrub status" |
| #define SCRUB_FILE_VERSION "1" |
| |
| struct scrub_stats { |
| time_t t_start; |
| time_t t_resumed; |
| u64 duration; |
| u64 finished; |
| u64 canceled; |
| int in_progress; |
| }; |
| |
| /* TBD: replace with #include "linux/ioprio.h" in some years */ |
| #if !defined (IOPRIO_H) |
| #define IOPRIO_WHO_PROCESS 1 |
| #define IOPRIO_CLASS_SHIFT 13 |
| #define IOPRIO_PRIO_VALUE(class, data) \ |
| (((class) << IOPRIO_CLASS_SHIFT) | (data)) |
| #define IOPRIO_CLASS_IDLE 3 |
| #endif |
| |
| struct scrub_progress { |
| struct btrfs_ioctl_scrub_args scrub_args; |
| int fd; |
| int ret; |
| int skip; |
| struct scrub_stats stats; |
| struct scrub_file_record *resumed; |
| int ioctl_errno; |
| pthread_mutex_t progress_mutex; |
| int ioprio_class; |
| int ioprio_classdata; |
| }; |
| |
| struct scrub_file_record { |
| u8 fsid[BTRFS_FSID_SIZE]; |
| u64 devid; |
| struct scrub_stats stats; |
| struct btrfs_scrub_progress p; |
| }; |
| |
| struct scrub_progress_cycle { |
| int fdmnt; |
| int prg_fd; |
| int do_record; |
| struct btrfs_ioctl_fs_info_args *fi; |
| struct scrub_progress *progress; |
| struct scrub_progress *shared_progress; |
| pthread_mutex_t *write_mutex; |
| }; |
| |
| struct scrub_fs_stat { |
| struct btrfs_scrub_progress p; |
| struct scrub_stats s; |
| int i; |
| }; |
| |
| static void print_scrub_full(struct btrfs_scrub_progress *sp) |
| { |
| printf("\tdata_extents_scrubbed: %lld\n", sp->data_extents_scrubbed); |
| printf("\ttree_extents_scrubbed: %lld\n", sp->tree_extents_scrubbed); |
| printf("\tdata_bytes_scrubbed: %lld\n", sp->data_bytes_scrubbed); |
| printf("\ttree_bytes_scrubbed: %lld\n", sp->tree_bytes_scrubbed); |
| printf("\tread_errors: %lld\n", sp->read_errors); |
| printf("\tcsum_errors: %lld\n", sp->csum_errors); |
| printf("\tverify_errors: %lld\n", sp->verify_errors); |
| printf("\tno_csum: %lld\n", sp->no_csum); |
| printf("\tcsum_discards: %lld\n", sp->csum_discards); |
| printf("\tsuper_errors: %lld\n", sp->super_errors); |
| printf("\tmalloc_errors: %lld\n", sp->malloc_errors); |
| printf("\tuncorrectable_errors: %lld\n", sp->uncorrectable_errors); |
| printf("\tunverified_errors: %lld\n", sp->unverified_errors); |
| printf("\tcorrected_errors: %lld\n", sp->corrected_errors); |
| printf("\tlast_physical: %lld\n", sp->last_physical); |
| } |
| |
| #define ERR(test, ...) do { \ |
| if (test) \ |
| fprintf(stderr, __VA_ARGS__); \ |
| } while (0) |
| |
| #define PRINT_SCRUB_ERROR(test, desc) do { \ |
| if (test) \ |
| printf(" %s=%llu", desc, test); \ |
| } while (0) |
| |
| static void print_scrub_summary(struct btrfs_scrub_progress *p) |
| { |
| u64 err_cnt; |
| u64 err_cnt2; |
| |
| err_cnt = p->read_errors + |
| p->csum_errors + |
| p->verify_errors + |
| p->super_errors; |
| |
| err_cnt2 = p->corrected_errors + p->uncorrectable_errors; |
| |
| if (p->malloc_errors) |
| printf("*** WARNING: memory allocation failed while scrubbing. " |
| "results may be inaccurate\n"); |
| |
| printf("\ttotal bytes scrubbed: %s with %llu errors\n", |
| pretty_size(p->data_bytes_scrubbed + p->tree_bytes_scrubbed), |
| max(err_cnt, err_cnt2)); |
| |
| if (err_cnt || err_cnt2) { |
| printf("\terror details:"); |
| PRINT_SCRUB_ERROR(p->read_errors, "read"); |
| PRINT_SCRUB_ERROR(p->super_errors, "super"); |
| PRINT_SCRUB_ERROR(p->verify_errors, "verify"); |
| PRINT_SCRUB_ERROR(p->csum_errors, "csum"); |
| printf("\n"); |
| printf("\tcorrected errors: %llu, uncorrectable errors: %llu, " |
| "unverified errors: %llu\n", p->corrected_errors, |
| p->uncorrectable_errors, p->unverified_errors); |
| } |
| } |
| |
| #define _SCRUB_FS_STAT(p, name, fs_stat) do { \ |
| fs_stat->p.name += p->name; \ |
| } while (0) |
| |
| #define _SCRUB_FS_STAT_MIN(ss, name, fs_stat) \ |
| do { \ |
| if (fs_stat->s.name > ss->name) { \ |
| fs_stat->s.name = ss->name; \ |
| } \ |
| } while (0) |
| |
| #define _SCRUB_FS_STAT_ZMIN(ss, name, fs_stat) \ |
| do { \ |
| if (!fs_stat->s.name || fs_stat->s.name > ss->name) { \ |
| fs_stat->s.name = ss->name; \ |
| } \ |
| } while (0) |
| |
| #define _SCRUB_FS_STAT_ZMAX(ss, name, fs_stat) \ |
| do { \ |
| if (!(fs_stat)->s.name || (fs_stat)->s.name < (ss)->name) { \ |
| (fs_stat)->s.name = (ss)->name; \ |
| } \ |
| } while (0) |
| |
| static void add_to_fs_stat(struct btrfs_scrub_progress *p, |
| struct scrub_stats *ss, |
| struct scrub_fs_stat *fs_stat) |
| { |
| _SCRUB_FS_STAT(p, data_extents_scrubbed, fs_stat); |
| _SCRUB_FS_STAT(p, tree_extents_scrubbed, fs_stat); |
| _SCRUB_FS_STAT(p, data_bytes_scrubbed, fs_stat); |
| _SCRUB_FS_STAT(p, tree_bytes_scrubbed, fs_stat); |
| _SCRUB_FS_STAT(p, read_errors, fs_stat); |
| _SCRUB_FS_STAT(p, csum_errors, fs_stat); |
| _SCRUB_FS_STAT(p, verify_errors, fs_stat); |
| _SCRUB_FS_STAT(p, no_csum, fs_stat); |
| _SCRUB_FS_STAT(p, csum_discards, fs_stat); |
| _SCRUB_FS_STAT(p, super_errors, fs_stat); |
| _SCRUB_FS_STAT(p, malloc_errors, fs_stat); |
| _SCRUB_FS_STAT(p, uncorrectable_errors, fs_stat); |
| _SCRUB_FS_STAT(p, corrected_errors, fs_stat); |
| _SCRUB_FS_STAT(p, last_physical, fs_stat); |
| _SCRUB_FS_STAT_ZMIN(ss, t_start, fs_stat); |
| _SCRUB_FS_STAT_ZMIN(ss, t_resumed, fs_stat); |
| _SCRUB_FS_STAT_ZMAX(ss, duration, fs_stat); |
| _SCRUB_FS_STAT_ZMAX(ss, canceled, fs_stat); |
| _SCRUB_FS_STAT_MIN(ss, finished, fs_stat); |
| } |
| |
| static void init_fs_stat(struct scrub_fs_stat *fs_stat) |
| { |
| memset(fs_stat, 0, sizeof(*fs_stat)); |
| fs_stat->s.finished = 1; |
| } |
| |
| static void _print_scrub_ss(struct scrub_stats *ss) |
| { |
| char t[4096]; |
| struct tm tm; |
| time_t seconds; |
| unsigned hours; |
| |
| if (!ss || !ss->t_start) { |
| printf("\tno stats available\n"); |
| return; |
| } |
| if (ss->t_resumed) { |
| localtime_r(&ss->t_resumed, &tm); |
| strftime(t, sizeof(t), "%c", &tm); |
| t[sizeof(t) - 1] = '\0'; |
| printf("\tscrub resumed at %s", t); |
| } else { |
| localtime_r(&ss->t_start, &tm); |
| strftime(t, sizeof(t), "%c", &tm); |
| t[sizeof(t) - 1] = '\0'; |
| printf("\tscrub started at %s", t); |
| } |
| |
| seconds = ss->duration; |
| hours = ss->duration / (60 * 60); |
| gmtime_r(&seconds, &tm); |
| strftime(t, sizeof(t), "%M:%S", &tm); |
| if (ss->in_progress) |
| printf(", running for %02u:%s\n", hours, t); |
| else if (ss->canceled) |
| printf(" and was aborted after %02u:%s\n", hours, t); |
| else if (ss->finished) |
| printf(" and finished after %02u:%s\n", hours, t); |
| else |
| printf(", interrupted after %02u:%s, not running\n", |
| hours, t); |
| } |
| |
| static void print_scrub_dev(struct btrfs_ioctl_dev_info_args *di, |
| struct btrfs_scrub_progress *p, int raw, |
| const char *append, struct scrub_stats *ss) |
| { |
| printf("scrub device %s (id %llu) %s\n", di->path, di->devid, |
| append ? append : ""); |
| |
| _print_scrub_ss(ss); |
| |
| if (p) { |
| if (raw) |
| print_scrub_full(p); |
| else |
| print_scrub_summary(p); |
| } |
| } |
| |
| static void print_fs_stat(struct scrub_fs_stat *fs_stat, int raw) |
| { |
| _print_scrub_ss(&fs_stat->s); |
| |
| if (raw) |
| print_scrub_full(&fs_stat->p); |
| else |
| print_scrub_summary(&fs_stat->p); |
| } |
| |
| static void free_history(struct scrub_file_record **last_scrubs) |
| { |
| struct scrub_file_record **l = last_scrubs; |
| if (!l || IS_ERR(l)) |
| return; |
| while (*l) |
| free(*l++); |
| free(last_scrubs); |
| } |
| |
| /* |
| * cancels a running scrub and makes the master process record the current |
| * progress status before exiting. |
| */ |
| static int cancel_fd = -1; |
| static void scrub_sigint_record_progress(int signal) |
| { |
| int ret; |
| |
| ret = ioctl(cancel_fd, BTRFS_IOC_SCRUB_CANCEL, NULL); |
| if (ret < 0) |
| perror("Scrub cancel failed"); |
| } |
| |
| static int scrub_handle_sigint_parent(void) |
| { |
| struct sigaction sa = { |
| .sa_handler = SIG_IGN, |
| .sa_flags = SA_RESTART, |
| }; |
| |
| return sigaction(SIGINT, &sa, NULL); |
| } |
| |
| static int scrub_handle_sigint_child(int fd) |
| { |
| struct sigaction sa = { |
| .sa_handler = fd == -1 ? SIG_DFL : scrub_sigint_record_progress, |
| }; |
| |
| cancel_fd = fd; |
| return sigaction(SIGINT, &sa, NULL); |
| } |
| |
| static int scrub_datafile(const char *fn_base, const char *fn_local, |
| const char *fn_tmp, char *datafile, int size) |
| { |
| int ret; |
| int end = size - 2; |
| |
| datafile[end + 1] = '\0'; |
| strncpy(datafile, fn_base, end); |
| ret = strlen(datafile); |
| |
| if (ret + 1 > end) |
| return -EOVERFLOW; |
| |
| datafile[ret] = '.'; |
| strncpy(datafile + ret + 1, fn_local, end - ret - 1); |
| ret = strlen(datafile); |
| |
| if (ret + 1 > end) |
| return -EOVERFLOW; |
| |
| if (fn_tmp) { |
| datafile[ret] = '_'; |
| strncpy(datafile + ret + 1, fn_tmp, end - ret - 1); |
| ret = strlen(datafile); |
| |
| if (ret > end) |
| return -EOVERFLOW; |
| } |
| |
| return 0; |
| } |
| |
| static int scrub_open_file(const char *datafile, int m) |
| { |
| int fd; |
| int ret; |
| |
| fd = open(datafile, m, 0600); |
| if (fd < 0) |
| return -errno; |
| |
| ret = flock(fd, LOCK_EX|LOCK_NB); |
| if (ret) { |
| ret = errno; |
| close(fd); |
| return -ret; |
| } |
| |
| return fd; |
| } |
| |
| static int scrub_open_file_r(const char *fn_base, const char *fn_local) |
| { |
| int ret; |
| char datafile[PATH_MAX]; |
| ret = scrub_datafile(fn_base, fn_local, NULL, |
| datafile, sizeof(datafile)); |
| if (ret < 0) |
| return ret; |
| return scrub_open_file(datafile, O_RDONLY); |
| } |
| |
| static int scrub_open_file_w(const char *fn_base, const char *fn_local, |
| const char *tmp) |
| { |
| int ret; |
| char datafile[PATH_MAX]; |
| ret = scrub_datafile(fn_base, fn_local, tmp, |
| datafile, sizeof(datafile)); |
| if (ret < 0) |
| return ret; |
| return scrub_open_file(datafile, O_WRONLY|O_CREAT); |
| } |
| |
| static int scrub_rename_file(const char *fn_base, const char *fn_local, |
| const char *tmp) |
| { |
| int ret; |
| char datafile_old[PATH_MAX]; |
| char datafile_new[PATH_MAX]; |
| ret = scrub_datafile(fn_base, fn_local, tmp, |
| datafile_old, sizeof(datafile_old)); |
| if (ret < 0) |
| return ret; |
| ret = scrub_datafile(fn_base, fn_local, NULL, |
| datafile_new, sizeof(datafile_new)); |
| if (ret < 0) |
| return ret; |
| ret = rename(datafile_old, datafile_new); |
| return ret ? -errno : 0; |
| } |
| |
| #define _SCRUB_KVREAD(ret, i, name, avail, l, dest) if (ret == 0) { \ |
| ret = scrub_kvread(i, sizeof(#name), avail, l, #name, dest.name); \ |
| } |
| |
| /* |
| * returns 0 if the key did not match (nothing was read) |
| * 1 if the key did match (success) |
| * -1 if the key did match and an error occured |
| */ |
| static int scrub_kvread(int *i, int len, int avail, const char *buf, |
| const char *key, u64 *dest) |
| { |
| int j; |
| |
| if (*i + len + 1 < avail && strncmp(&buf[*i], key, len - 1) == 0) { |
| *i += len - 1; |
| if (buf[*i] != ':') |
| return -1; |
| *i += 1; |
| for (j = 0; isdigit(buf[*i + j]) && *i + j < avail; ++j) |
| ; |
| if (*i + j >= avail) |
| return -1; |
| *dest = atoll(&buf[*i]); |
| *i += j; |
| return 1; |
| } |
| |
| return 0; |
| } |
| |
| #define _SCRUB_INVALID do { \ |
| if (report_errors) \ |
| fprintf(stderr, "WARNING: invalid data in line %d pos " \ |
| "%d state %d (near \"%.*s\") at %s:%d\n", \ |
| lineno, i, state, 20 > avail ? avail : 20, \ |
| l + i, __FILE__, __LINE__); \ |
| goto skip; \ |
| } while (0) |
| |
| static struct scrub_file_record **scrub_read_file(int fd, int report_errors) |
| { |
| int avail = 0; |
| int old_avail = 0; |
| char l[16 * 1024]; |
| int state = 0; |
| int curr = -1; |
| int i = 0; |
| int j; |
| int ret; |
| int eof = 0; |
| int lineno = 0; |
| u64 version; |
| char empty_uuid[BTRFS_FSID_SIZE] = {0}; |
| struct scrub_file_record **p = NULL; |
| |
| again: |
| old_avail = avail - i; |
| BUG_ON(old_avail < 0); |
| if (old_avail) |
| memmove(l, l + i, old_avail); |
| avail = read(fd, l + old_avail, sizeof(l) - old_avail); |
| if (avail == 0) |
| eof = 1; |
| if (avail == 0 && old_avail == 0) { |
| if (curr >= 0 && |
| memcmp(p[curr]->fsid, empty_uuid, BTRFS_FSID_SIZE) == 0) { |
| p[curr] = NULL; |
| } else if (curr == -1) { |
| p = ERR_PTR(-ENODATA); |
| } |
| return p; |
| } |
| if (avail == -1) { |
| free_history(p); |
| return ERR_PTR(-errno); |
| } |
| avail += old_avail; |
| |
| i = 0; |
| while (i < avail) { |
| void *tmp; |
| |
| switch (state) { |
| case 0: /* start of file */ |
| ret = scrub_kvread(&i, |
| sizeof(SCRUB_FILE_VERSION_PREFIX), avail, l, |
| SCRUB_FILE_VERSION_PREFIX, &version); |
| if (ret != 1) |
| _SCRUB_INVALID; |
| if (version != atoll(SCRUB_FILE_VERSION)) |
| return ERR_PTR(-ENOTSUP); |
| state = 6; |
| continue; |
| case 1: /* start of line, alloc */ |
| /* |
| * this state makes sure we have a complete line in |
| * further processing, so we don't need wrap-tracking |
| * everywhere. |
| */ |
| if (!eof && !memchr(l + i, '\n', avail - i)) |
| goto again; |
| ++lineno; |
| if (curr > -1 && memcmp(p[curr]->fsid, empty_uuid, |
| BTRFS_FSID_SIZE) == 0) { |
| state = 2; |
| continue; |
| } |
| ++curr; |
| tmp = p; |
| p = realloc(p, (curr + 2) * sizeof(*p)); |
| if (!p) { |
| free_history(tmp); |
| return ERR_PTR(-errno); |
| } |
| p[curr] = malloc(sizeof(**p)); |
| if (!p[curr]) { |
| free_history(p); |
| return ERR_PTR(-errno); |
| } |
| memset(p[curr], 0, sizeof(**p)); |
| p[curr + 1] = NULL; |
| ++state; |
| /* fall through */ |
| case 2: /* start of line, skip space */ |
| while (isspace(l[i]) && i < avail) { |
| if (l[i] == '\n') |
| ++lineno; |
| ++i; |
| } |
| if (i >= avail || |
| (!eof && !memchr(l + i, '\n', avail - i))) |
| goto again; |
| ++state; |
| /* fall through */ |
| case 3: /* read fsid */ |
| if (i == avail) |
| continue; |
| for (j = 0; l[i + j] != ':' && i + j < avail; ++j) |
| ; |
| if (i + j + 1 >= avail) |
| _SCRUB_INVALID; |
| if (j != BTRFS_UUID_UNPARSED_SIZE - 1) |
| _SCRUB_INVALID; |
| l[i + j] = '\0'; |
| ret = uuid_parse(l + i, p[curr]->fsid); |
| if (ret) |
| _SCRUB_INVALID; |
| i += j + 1; |
| ++state; |
| /* fall through */ |
| case 4: /* read dev id */ |
| for (j = 0; isdigit(l[i + j]) && i+j < avail; ++j) |
| ; |
| if (j == 0 || i + j + 1 >= avail) |
| _SCRUB_INVALID; |
| p[curr]->devid = atoll(&l[i]); |
| i += j + 1; |
| ++state; |
| /* fall through */ |
| case 5: /* read key/value pair */ |
| ret = 0; |
| _SCRUB_KVREAD(ret, &i, data_extents_scrubbed, avail, l, |
| &p[curr]->p); |
| _SCRUB_KVREAD(ret, &i, data_extents_scrubbed, avail, l, |
| &p[curr]->p); |
| _SCRUB_KVREAD(ret, &i, tree_extents_scrubbed, avail, l, |
| &p[curr]->p); |
| _SCRUB_KVREAD(ret, &i, data_bytes_scrubbed, avail, l, |
| &p[curr]->p); |
| _SCRUB_KVREAD(ret, &i, tree_bytes_scrubbed, avail, l, |
| &p[curr]->p); |
| _SCRUB_KVREAD(ret, &i, read_errors, avail, l, |
| &p[curr]->p); |
| _SCRUB_KVREAD(ret, &i, csum_errors, avail, l, |
| &p[curr]->p); |
| _SCRUB_KVREAD(ret, &i, verify_errors, avail, l, |
| &p[curr]->p); |
| _SCRUB_KVREAD(ret, &i, no_csum, avail, l, |
| &p[curr]->p); |
| _SCRUB_KVREAD(ret, &i, csum_discards, avail, l, |
| &p[curr]->p); |
| _SCRUB_KVREAD(ret, &i, super_errors, avail, l, |
| &p[curr]->p); |
| _SCRUB_KVREAD(ret, &i, malloc_errors, avail, l, |
| &p[curr]->p); |
| _SCRUB_KVREAD(ret, &i, uncorrectable_errors, avail, l, |
| &p[curr]->p); |
| _SCRUB_KVREAD(ret, &i, corrected_errors, avail, l, |
| &p[curr]->p); |
| _SCRUB_KVREAD(ret, &i, last_physical, avail, l, |
| &p[curr]->p); |
| _SCRUB_KVREAD(ret, &i, finished, avail, l, |
| &p[curr]->stats); |
| _SCRUB_KVREAD(ret, &i, t_start, avail, l, |
| (u64 *)&p[curr]->stats); |
| _SCRUB_KVREAD(ret, &i, t_resumed, avail, l, |
| (u64 *)&p[curr]->stats); |
| _SCRUB_KVREAD(ret, &i, duration, avail, l, |
| (u64 *)&p[curr]->stats); |
| _SCRUB_KVREAD(ret, &i, canceled, avail, l, |
| &p[curr]->stats); |
| if (ret != 1) |
| _SCRUB_INVALID; |
| ++state; |
| /* fall through */ |
| case 6: /* after number */ |
| if (l[i] == '|') |
| state = 5; |
| else if (l[i] == '\n') |
| state = 1; |
| else |
| _SCRUB_INVALID; |
| ++i; |
| continue; |
| case 99: /* skip rest of line */ |
| skip: |
| state = 99; |
| do { |
| ++i; |
| if (l[i - 1] == '\n') { |
| state = 1; |
| break; |
| } |
| } while (i < avail); |
| continue; |
| } |
| BUG(); |
| } |
| goto again; |
| } |
| |
| static int scrub_write_buf(int fd, const void *data, int len) |
| { |
| int ret; |
| ret = write(fd, data, len); |
| return ret - len; |
| } |
| |
| static int scrub_writev(int fd, char *buf, int max, const char *fmt, ...) |
| __attribute__ ((format (printf, 4, 5))); |
| static int scrub_writev(int fd, char *buf, int max, const char *fmt, ...) |
| { |
| int ret; |
| va_list args; |
| |
| va_start(args, fmt); |
| ret = vsnprintf(buf, max, fmt, args); |
| va_end(args); |
| if (ret >= max) |
| return ret - max; |
| return scrub_write_buf(fd, buf, ret); |
| } |
| |
| #define _SCRUB_SUM(dest, data, name) dest->scrub_args.progress.name = \ |
| data->resumed->p.name + data->scrub_args.progress.name |
| |
| static struct scrub_progress *scrub_resumed_stats(struct scrub_progress *data, |
| struct scrub_progress *dest) |
| { |
| if (!data->resumed || data->skip) |
| return data; |
| |
| _SCRUB_SUM(dest, data, data_extents_scrubbed); |
| _SCRUB_SUM(dest, data, tree_extents_scrubbed); |
| _SCRUB_SUM(dest, data, data_bytes_scrubbed); |
| _SCRUB_SUM(dest, data, tree_bytes_scrubbed); |
| _SCRUB_SUM(dest, data, read_errors); |
| _SCRUB_SUM(dest, data, csum_errors); |
| _SCRUB_SUM(dest, data, verify_errors); |
| _SCRUB_SUM(dest, data, no_csum); |
| _SCRUB_SUM(dest, data, csum_discards); |
| _SCRUB_SUM(dest, data, super_errors); |
| _SCRUB_SUM(dest, data, malloc_errors); |
| _SCRUB_SUM(dest, data, uncorrectable_errors); |
| _SCRUB_SUM(dest, data, corrected_errors); |
| _SCRUB_SUM(dest, data, last_physical); |
| dest->stats.canceled = data->stats.canceled; |
| dest->stats.finished = data->stats.finished; |
| dest->stats.t_resumed = data->stats.t_start; |
| dest->stats.t_start = data->resumed->stats.t_start; |
| dest->stats.duration = data->resumed->stats.duration + |
| data->stats.duration; |
| dest->scrub_args.devid = data->scrub_args.devid; |
| return dest; |
| } |
| |
| #define _SCRUB_KVWRITE(fd, buf, name, use) \ |
| scrub_kvwrite(fd, buf, sizeof(buf), #name, \ |
| use->scrub_args.progress.name) |
| |
| #define _SCRUB_KVWRITE_STATS(fd, buf, name, use) \ |
| scrub_kvwrite(fd, buf, sizeof(buf), #name, \ |
| use->stats.name) |
| |
| static int scrub_kvwrite(int fd, char *buf, int max, const char *key, u64 val) |
| { |
| return scrub_writev(fd, buf, max, "|%s:%lld", key, val); |
| } |
| |
| static int scrub_write_file(int fd, const char *fsid, |
| struct scrub_progress *data, int n) |
| { |
| int ret = 0; |
| int i; |
| char buf[1024]; |
| struct scrub_progress local; |
| struct scrub_progress *use; |
| |
| if (n < 1) |
| return -EINVAL; |
| |
| /* each -1 is to subtract one \0 byte, the + 2 is for ':' and '\n' */ |
| ret = scrub_write_buf(fd, SCRUB_FILE_VERSION_PREFIX ":" |
| SCRUB_FILE_VERSION "\n", |
| (sizeof(SCRUB_FILE_VERSION_PREFIX) - 1) + |
| (sizeof(SCRUB_FILE_VERSION) - 1) + 2); |
| if (ret) |
| return -EOVERFLOW; |
| |
| for (i = 0; i < n; ++i) { |
| use = scrub_resumed_stats(&data[i], &local); |
| if (scrub_write_buf(fd, fsid, strlen(fsid)) || |
| scrub_write_buf(fd, ":", 1) || |
| scrub_writev(fd, buf, sizeof(buf), "%lld", |
| use->scrub_args.devid) || |
| scrub_write_buf(fd, buf, ret) || |
| _SCRUB_KVWRITE(fd, buf, data_extents_scrubbed, use) || |
| _SCRUB_KVWRITE(fd, buf, tree_extents_scrubbed, use) || |
| _SCRUB_KVWRITE(fd, buf, data_bytes_scrubbed, use) || |
| _SCRUB_KVWRITE(fd, buf, tree_bytes_scrubbed, use) || |
| _SCRUB_KVWRITE(fd, buf, read_errors, use) || |
| _SCRUB_KVWRITE(fd, buf, csum_errors, use) || |
| _SCRUB_KVWRITE(fd, buf, verify_errors, use) || |
| _SCRUB_KVWRITE(fd, buf, no_csum, use) || |
| _SCRUB_KVWRITE(fd, buf, csum_discards, use) || |
| _SCRUB_KVWRITE(fd, buf, super_errors, use) || |
| _SCRUB_KVWRITE(fd, buf, malloc_errors, use) || |
| _SCRUB_KVWRITE(fd, buf, uncorrectable_errors, use) || |
| _SCRUB_KVWRITE(fd, buf, corrected_errors, use) || |
| _SCRUB_KVWRITE(fd, buf, last_physical, use) || |
| _SCRUB_KVWRITE_STATS(fd, buf, t_start, use) || |
| _SCRUB_KVWRITE_STATS(fd, buf, t_resumed, use) || |
| _SCRUB_KVWRITE_STATS(fd, buf, duration, use) || |
| _SCRUB_KVWRITE_STATS(fd, buf, canceled, use) || |
| _SCRUB_KVWRITE_STATS(fd, buf, finished, use) || |
| scrub_write_buf(fd, "\n", 1)) { |
| return -EOVERFLOW; |
| } |
| } |
| |
| return 0; |
| } |
| |
| static int scrub_write_progress(pthread_mutex_t *m, const char *fsid, |
| struct scrub_progress *data, int n) |
| { |
| int ret; |
| int err; |
| int fd = -1; |
| int old; |
| |
| ret = pthread_setcancelstate(PTHREAD_CANCEL_DISABLE, &old); |
| if (ret) { |
| err = -ret; |
| goto out3; |
| } |
| |
| ret = pthread_mutex_lock(m); |
| if (ret) { |
| err = -ret; |
| goto out2; |
| } |
| |
| fd = scrub_open_file_w(SCRUB_DATA_FILE, fsid, "tmp"); |
| if (fd < 0) { |
| err = fd; |
| goto out1; |
| } |
| err = scrub_write_file(fd, fsid, data, n); |
| if (err) |
| goto out1; |
| err = scrub_rename_file(SCRUB_DATA_FILE, fsid, "tmp"); |
| if (err) |
| goto out1; |
| |
| out1: |
| if (fd >= 0) { |
| ret = close(fd); |
| if (ret) |
| err = -errno; |
| } |
| |
| ret = pthread_mutex_unlock(m); |
| if (ret && !err) |
| err = -ret; |
| |
| out2: |
| ret = pthread_setcancelstate(PTHREAD_CANCEL_ENABLE, &old); |
| if (ret && !err) |
| err = -ret; |
| |
| out3: |
| return err; |
| } |
| |
| static void *scrub_one_dev(void *ctx) |
| { |
| struct scrub_progress *sp = ctx; |
| int ret; |
| struct timeval tv; |
| |
| sp->stats.canceled = 0; |
| sp->stats.duration = 0; |
| sp->stats.finished = 0; |
| |
| ret = syscall(SYS_ioprio_set, IOPRIO_WHO_PROCESS, 0, |
| IOPRIO_PRIO_VALUE(sp->ioprio_class, |
| sp->ioprio_classdata)); |
| if (ret) |
| fprintf(stderr, |
| "WARNING: setting ioprio failed: %s (ignored).\n", |
| strerror(errno)); |
| |
| ret = ioctl(sp->fd, BTRFS_IOC_SCRUB, &sp->scrub_args); |
| gettimeofday(&tv, NULL); |
| sp->ret = ret; |
| sp->stats.duration = tv.tv_sec - sp->stats.t_start; |
| sp->stats.canceled = !!ret; |
| sp->ioctl_errno = errno; |
| ret = pthread_mutex_lock(&sp->progress_mutex); |
| if (ret) |
| return ERR_PTR(-ret); |
| sp->stats.finished = 1; |
| ret = pthread_mutex_unlock(&sp->progress_mutex); |
| if (ret) |
| return ERR_PTR(-ret); |
| |
| return NULL; |
| } |
| |
| static void *progress_one_dev(void *ctx) |
| { |
| struct scrub_progress *sp = ctx; |
| |
| sp->ret = ioctl(sp->fd, BTRFS_IOC_SCRUB_PROGRESS, &sp->scrub_args); |
| sp->ioctl_errno = errno; |
| |
| return NULL; |
| } |
| |
| /* nb: returns a negative errno via ERR_PTR */ |
| static void *scrub_progress_cycle(void *ctx) |
| { |
| int ret = 0; |
| int perr = 0; /* positive / pthread error returns */ |
| int old; |
| int i; |
| char fsid[BTRFS_UUID_UNPARSED_SIZE]; |
| struct scrub_progress *sp; |
| struct scrub_progress *sp_last; |
| struct scrub_progress *sp_shared; |
| struct timeval tv; |
| struct scrub_progress_cycle *spc = ctx; |
| int ndev = spc->fi->num_devices; |
| int this = 1; |
| int last = 0; |
| int peer_fd = -1; |
| struct pollfd accept_poll_fd = { |
| .fd = spc->prg_fd, |
| .events = POLLIN, |
| .revents = 0, |
| }; |
| struct pollfd write_poll_fd = { |
| .events = POLLOUT, |
| .revents = 0, |
| }; |
| struct sockaddr_un peer; |
| socklen_t peer_size = sizeof(peer); |
| |
| perr = pthread_setcanceltype(PTHREAD_CANCEL_ASYNCHRONOUS, &old); |
| if (perr) |
| goto out; |
| |
| uuid_unparse(spc->fi->fsid, fsid); |
| |
| for (i = 0; i < ndev; ++i) { |
| sp = &spc->progress[i]; |
| sp_last = &spc->progress[i + ndev]; |
| sp_shared = &spc->shared_progress[i]; |
| sp->scrub_args.devid = sp_last->scrub_args.devid = |
| sp_shared->scrub_args.devid; |
| sp->fd = sp_last->fd = spc->fdmnt; |
| sp->stats.t_start = sp_last->stats.t_start = |
| sp_shared->stats.t_start; |
| sp->resumed = sp_last->resumed = sp_shared->resumed; |
| sp->skip = sp_last->skip = sp_shared->skip; |
| sp->stats.finished = sp_last->stats.finished = |
| sp_shared->stats.finished; |
| } |
| |
| while (1) { |
| ret = poll(&accept_poll_fd, 1, 5 * 1000); |
| if (ret == -1) { |
| ret = -errno; |
| goto out; |
| } |
| if (ret) |
| peer_fd = accept(spc->prg_fd, (struct sockaddr *)&peer, |
| &peer_size); |
| gettimeofday(&tv, NULL); |
| this = (this + 1)%2; |
| last = (last + 1)%2; |
| for (i = 0; i < ndev; ++i) { |
| sp = &spc->progress[this * ndev + i]; |
| sp_last = &spc->progress[last * ndev + i]; |
| sp_shared = &spc->shared_progress[i]; |
| if (sp->stats.finished) |
| continue; |
| progress_one_dev(sp); |
| sp->stats.duration = tv.tv_sec - sp->stats.t_start; |
| if (!sp->ret) |
| continue; |
| if (sp->ioctl_errno != ENOTCONN && |
| sp->ioctl_errno != ENODEV) { |
| ret = -sp->ioctl_errno; |
| goto out; |
| } |
| /* |
| * scrub finished or device removed, check the |
| * finished flag. if unset, just use the last |
| * result we got for the current write and go |
| * on. flag should be set on next cycle, then. |
| */ |
| perr = pthread_setcancelstate( |
| PTHREAD_CANCEL_DISABLE, &old); |
| if (perr) |
| goto out; |
| perr = pthread_mutex_lock(&sp_shared->progress_mutex); |
| if (perr) |
| goto out; |
| if (!sp_shared->stats.finished) { |
| perr = pthread_mutex_unlock( |
| &sp_shared->progress_mutex); |
| if (perr) |
| goto out; |
| perr = pthread_setcancelstate( |
| PTHREAD_CANCEL_ENABLE, &old); |
| if (perr) |
| goto out; |
| memcpy(sp, sp_last, sizeof(*sp)); |
| continue; |
| } |
| perr = pthread_mutex_unlock(&sp_shared->progress_mutex); |
| if (perr) |
| goto out; |
| perr = pthread_setcancelstate( |
| PTHREAD_CANCEL_ENABLE, &old); |
| if (perr) |
| goto out; |
| memcpy(sp, sp_shared, sizeof(*sp)); |
| memcpy(sp_last, sp_shared, sizeof(*sp)); |
| } |
| if (peer_fd != -1) { |
| write_poll_fd.fd = peer_fd; |
| ret = poll(&write_poll_fd, 1, 0); |
| if (ret == -1) { |
| ret = -errno; |
| goto out; |
| } |
| if (ret) { |
| ret = scrub_write_file( |
| peer_fd, fsid, |
| &spc->progress[this * ndev], ndev); |
| if (ret) |
| goto out; |
| } |
| close(peer_fd); |
| peer_fd = -1; |
| } |
| if (!spc->do_record) |
| continue; |
| ret = scrub_write_progress(spc->write_mutex, fsid, |
| &spc->progress[this * ndev], ndev); |
| if (ret) |
| goto out; |
| } |
| out: |
| if (peer_fd != -1) |
| close(peer_fd); |
| if (perr) |
| ret = -perr; |
| return ERR_PTR(ret); |
| } |
| |
| static struct scrub_file_record *last_dev_scrub( |
| struct scrub_file_record *const *const past_scrubs, u64 devid) |
| { |
| int i; |
| |
| if (!past_scrubs || IS_ERR(past_scrubs)) |
| return NULL; |
| |
| for (i = 0; past_scrubs[i]; ++i) |
| if (past_scrubs[i]->devid == devid) |
| return past_scrubs[i]; |
| |
| return NULL; |
| } |
| |
| static int mkdir_p(char *path) |
| { |
| int i; |
| int ret; |
| |
| for (i = 1; i < strlen(path); ++i) { |
| if (path[i] != '/') |
| continue; |
| path[i] = '\0'; |
| ret = mkdir(path, 0777); |
| if (ret && errno != EEXIST) |
| return -errno; |
| path[i] = '/'; |
| } |
| |
| return 0; |
| } |
| |
| static int is_scrub_running_on_fs(struct btrfs_ioctl_fs_info_args *fi_args, |
| struct btrfs_ioctl_dev_info_args *di_args, |
| struct scrub_file_record **past_scrubs) |
| { |
| int i; |
| |
| if (!fi_args || !di_args || !past_scrubs) |
| return 0; |
| |
| for (i = 0; i < fi_args->num_devices; i++) { |
| struct scrub_file_record *sfr = |
| last_dev_scrub(past_scrubs, di_args[i].devid); |
| |
| if (!sfr) |
| continue; |
| if (!(sfr->stats.finished || sfr->stats.canceled)) |
| return 1; |
| } |
| return 0; |
| } |
| |
| static int is_scrub_running_in_kernel(int fd, |
| struct btrfs_ioctl_dev_info_args *di_args, u64 max_devices) |
| { |
| struct scrub_progress sp; |
| int i; |
| int ret; |
| |
| for (i = 0; i < max_devices; i++) { |
| memset(&sp, 0, sizeof(sp)); |
| sp.scrub_args.devid = di_args[i].devid; |
| ret = ioctl(fd, BTRFS_IOC_SCRUB_PROGRESS, &sp.scrub_args); |
| if (!ret) |
| return 1; |
| } |
| |
| return 0; |
| } |
| |
| static const char * const cmd_scrub_start_usage[]; |
| static const char * const cmd_scrub_resume_usage[]; |
| |
| static int scrub_start(int argc, char **argv, int resume) |
| { |
| int fdmnt; |
| int prg_fd = -1; |
| int fdres = -1; |
| int ret; |
| pid_t pid; |
| int c; |
| int i; |
| int err = 0; |
| int e_uncorrectable = 0; |
| int e_correctable = 0; |
| int print_raw = 0; |
| char *path; |
| int do_background = 1; |
| int do_wait = 0; |
| int do_print = 0; |
| int do_quiet = 0; |
| int do_record = 1; |
| int readonly = 0; |
| int do_stats_per_dev = 0; |
| int ioprio_class = IOPRIO_CLASS_IDLE; |
| int ioprio_classdata = 0; |
| int n_start = 0; |
| int n_skip = 0; |
| int n_resume = 0; |
| struct btrfs_ioctl_fs_info_args fi_args; |
| struct btrfs_ioctl_dev_info_args *di_args = NULL; |
| struct scrub_progress *sp = NULL; |
| struct scrub_fs_stat fs_stat; |
| struct timeval tv; |
| struct sockaddr_un addr = { |
| .sun_family = AF_UNIX, |
| }; |
| pthread_t *t_devs = NULL; |
| pthread_t t_prog; |
| struct scrub_file_record **past_scrubs = NULL; |
| struct scrub_file_record *last_scrub = NULL; |
| char *datafile = strdup(SCRUB_DATA_FILE); |
| char fsid[BTRFS_UUID_UNPARSED_SIZE]; |
| char sock_path[PATH_MAX] = ""; |
| struct scrub_progress_cycle spc; |
| pthread_mutex_t spc_write_mutex = PTHREAD_MUTEX_INITIALIZER; |
| void *terr; |
| u64 devid; |
| DIR *dirstream = NULL; |
| int force = 0; |
| int nothing_to_resume = 0; |
| |
| optind = 1; |
| while ((c = getopt(argc, argv, "BdqrRc:n:f")) != -1) { |
| switch (c) { |
| case 'B': |
| do_background = 0; |
| do_wait = 1; |
| do_print = 1; |
| break; |
| case 'd': |
| do_stats_per_dev = 1; |
| break; |
| case 'q': |
| do_quiet = 1; |
| break; |
| case 'r': |
| readonly = 1; |
| break; |
| case 'R': |
| print_raw = 1; |
| break; |
| case 'c': |
| ioprio_class = (int)strtol(optarg, NULL, 10); |
| break; |
| case 'n': |
| ioprio_classdata = (int)strtol(optarg, NULL, 10); |
| break; |
| case 'f': |
| force = 1; |
| break; |
| case '?': |
| default: |
| usage(resume ? cmd_scrub_resume_usage : |
| cmd_scrub_start_usage); |
| } |
| } |
| |
| /* try to catch most error cases before forking */ |
| |
| if (check_argc_exact(argc - optind, 1)) { |
| usage(resume ? cmd_scrub_resume_usage : |
| cmd_scrub_start_usage); |
| } |
| |
| spc.progress = NULL; |
| if (do_quiet && do_print) |
| do_print = 0; |
| |
| if (mkdir_p(datafile)) { |
| ERR(!do_quiet, "WARNING: cannot create scrub data " |
| "file, mkdir %s failed: %s. Status recording " |
| "disabled\n", datafile, strerror(errno)); |
| do_record = 0; |
| } |
| free(datafile); |
| |
| path = argv[optind]; |
| |
| fdmnt = open_path_or_dev_mnt(path, &dirstream); |
| |
| if (fdmnt < 0) { |
| if (errno == EINVAL) |
| ERR(!do_quiet, |
| "ERROR: '%s' is not a mounted btrfs device\n", |
| path); |
| else |
| ERR(!do_quiet, "ERROR: can't access '%s': %s\n", |
| path, strerror(errno)); |
| return 1; |
| } |
| |
| ret = get_fs_info(path, &fi_args, &di_args); |
| if (ret) { |
| ERR(!do_quiet, "ERROR: getting dev info for scrub failed: " |
| "%s\n", strerror(-ret)); |
| err = 1; |
| goto out; |
| } |
| if (!fi_args.num_devices) { |
| ERR(!do_quiet, "ERROR: no devices found\n"); |
| err = 1; |
| goto out; |
| } |
| |
| uuid_unparse(fi_args.fsid, fsid); |
| fdres = scrub_open_file_r(SCRUB_DATA_FILE, fsid); |
| if (fdres < 0 && fdres != -ENOENT) { |
| ERR(!do_quiet, "WARNING: failed to open status file: " |
| "%s\n", strerror(-fdres)); |
| } else if (fdres >= 0) { |
| past_scrubs = scrub_read_file(fdres, !do_quiet); |
| if (IS_ERR(past_scrubs)) |
| ERR(!do_quiet, "WARNING: failed to read status file: " |
| "%s\n", strerror(-PTR_ERR(past_scrubs))); |
| close(fdres); |
| } |
| |
| /* |
| * Check for stale information in the status file, ie. if it's |
| * canceled=0, finished=0 but no scrub is running. |
| */ |
| if (!is_scrub_running_in_kernel(fdmnt, di_args, fi_args.num_devices)) |
| force = 1; |
| |
| /* |
| * check whether any involved device is already busy running a |
| * scrub. This would cause damaged status messages and the state |
| * "aborted" without the explanation that a scrub was already |
| * running. Therefore check it first, prevent it and give some |
| * feedback to the user if scrub is already running. |
| * Note that if scrub is started with a block device as the |
| * parameter, only that particular block device is checked. It |
| * is a normal mode of operation to start scrub on multiple |
| * single devices, there is no reason to prevent this. |
| */ |
| if (!force && is_scrub_running_on_fs(&fi_args, di_args, past_scrubs)) { |
| ERR(!do_quiet, |
| "ERROR: scrub is already running.\n" |
| "To cancel use 'btrfs scrub cancel %s'.\n" |
| "To see the status use 'btrfs scrub status [-d] %s'.\n", |
| path, path); |
| err = 1; |
| goto out; |
| } |
| |
| t_devs = malloc(fi_args.num_devices * sizeof(*t_devs)); |
| sp = calloc(fi_args.num_devices, sizeof(*sp)); |
| spc.progress = calloc(fi_args.num_devices * 2, sizeof(*spc.progress)); |
| |
| if (!t_devs || !sp || !spc.progress) { |
| ERR(!do_quiet, "ERROR: scrub failed: %s", strerror(errno)); |
| err = 1; |
| goto out; |
| } |
| |
| for (i = 0; i < fi_args.num_devices; ++i) { |
| devid = di_args[i].devid; |
| ret = pthread_mutex_init(&sp[i].progress_mutex, NULL); |
| if (ret) { |
| ERR(!do_quiet, "ERROR: pthread_mutex_init failed: " |
| "%s\n", strerror(ret)); |
| err = 1; |
| goto out; |
| } |
| last_scrub = last_dev_scrub(past_scrubs, devid); |
| sp[i].scrub_args.devid = devid; |
| sp[i].fd = fdmnt; |
| if (resume && last_scrub && (last_scrub->stats.canceled || |
| !last_scrub->stats.finished)) { |
| ++n_resume; |
| sp[i].scrub_args.start = last_scrub->p.last_physical; |
| sp[i].resumed = last_scrub; |
| } else if (resume) { |
| ++n_skip; |
| sp[i].skip = 1; |
| sp[i].resumed = last_scrub; |
| continue; |
| } else { |
| ++n_start; |
| sp[i].scrub_args.start = 0ll; |
| sp[i].resumed = NULL; |
| } |
| sp[i].skip = 0; |
| sp[i].scrub_args.end = (u64)-1ll; |
| sp[i].scrub_args.flags = readonly ? BTRFS_SCRUB_READONLY : 0; |
| sp[i].ioprio_class = ioprio_class; |
| sp[i].ioprio_classdata = ioprio_classdata; |
| } |
| |
| if (!n_start && !n_resume) { |
| if (!do_quiet) |
| printf("scrub: nothing to resume for %s, fsid %s\n", |
| path, fsid); |
| nothing_to_resume = 1; |
| goto out; |
| } |
| |
| ret = prg_fd = socket(AF_UNIX, SOCK_STREAM, 0); |
| while (ret != -1) { |
| ret = scrub_datafile(SCRUB_PROGRESS_SOCKET_PATH, fsid, NULL, |
| sock_path, sizeof(sock_path)); |
| /* ignore EOVERFLOW, try using a shorter path for the socket */ |
| addr.sun_path[sizeof(addr.sun_path) - 1] = '\0'; |
| strncpy(addr.sun_path, sock_path, sizeof(addr.sun_path) - 1); |
| ret = bind(prg_fd, (struct sockaddr *)&addr, sizeof(addr)); |
| if (ret != -1 || errno != EADDRINUSE) |
| break; |
| /* |
| * bind failed with EADDRINUSE. so let's see if anyone answers |
| * when we make a call to the socket ... |
| */ |
| ret = connect(prg_fd, (struct sockaddr *)&addr, sizeof(addr)); |
| if (!ret || errno != ECONNREFUSED) { |
| /* ... yes, so scrub must be running. error out */ |
| fprintf(stderr, "ERROR: scrub already running\n"); |
| close(prg_fd); |
| prg_fd = -1; |
| goto out; |
| } |
| /* |
| * ... no, this means someone left us alone with an unused |
| * socket in the file system. remove it and try again. |
| */ |
| ret = unlink(sock_path); |
| } |
| if (ret != -1) |
| ret = listen(prg_fd, 100); |
| if (ret == -1) { |
| ERR(!do_quiet, "WARNING: failed to open the progress status " |
| "socket at %s: %s. Progress cannot be queried\n", |
| sock_path[0] ? sock_path : SCRUB_PROGRESS_SOCKET_PATH, |
| strerror(errno)); |
| if (prg_fd != -1) { |
| close(prg_fd); |
| prg_fd = -1; |
| if (sock_path[0]) |
| unlink(sock_path); |
| } |
| } |
| |
| if (do_record) { |
| /* write all-zero progress file for a start */ |
| ret = scrub_write_progress(&spc_write_mutex, fsid, sp, |
| fi_args.num_devices); |
| if (ret) { |
| ERR(!do_quiet, "WARNING: failed to write the progress " |
| "status file: %s. Status recording disabled\n", |
| strerror(-ret)); |
| do_record = 0; |
| } |
| } |
| |
| if (do_background) { |
| pid = fork(); |
| if (pid == -1) { |
| ERR(!do_quiet, "ERROR: cannot scrub, fork failed: " |
| "%s\n", strerror(errno)); |
| err = 1; |
| goto out; |
| } |
| |
| if (pid) { |
| int stat; |
| scrub_handle_sigint_parent(); |
| if (!do_quiet) |
| printf("scrub %s on %s, fsid %s (pid=%d)\n", |
| n_start ? "started" : "resumed", |
| path, fsid, pid); |
| if (!do_wait) { |
| err = 0; |
| goto out; |
| } |
| ret = wait(&stat); |
| if (ret != pid) { |
| ERR(!do_quiet, "ERROR: wait failed: (ret=%d) " |
| "%s\n", ret, strerror(errno)); |
| err = 1; |
| goto out; |
| } |
| if (!WIFEXITED(stat) || WEXITSTATUS(stat)) { |
| ERR(!do_quiet, "ERROR: scrub process failed\n"); |
| err = WIFEXITED(stat) ? WEXITSTATUS(stat) : -1; |
| goto out; |
| } |
| err = 0; |
| goto out; |
| } |
| } |
| |
| scrub_handle_sigint_child(fdmnt); |
| |
| for (i = 0; i < fi_args.num_devices; ++i) { |
| if (sp[i].skip) { |
| sp[i].scrub_args.progress = sp[i].resumed->p; |
| sp[i].stats = sp[i].resumed->stats; |
| sp[i].ret = 0; |
| sp[i].stats.finished = 1; |
| continue; |
| } |
| devid = di_args[i].devid; |
| gettimeofday(&tv, NULL); |
| sp[i].stats.t_start = tv.tv_sec; |
| ret = pthread_create(&t_devs[i], NULL, |
| scrub_one_dev, &sp[i]); |
| if (ret) { |
| if (do_print) |
| fprintf(stderr, "ERROR: creating " |
| "scrub_one_dev[%llu] thread failed: " |
| "%s\n", devid, strerror(ret)); |
| err = 1; |
| goto out; |
| } |
| } |
| |
| spc.fdmnt = fdmnt; |
| spc.prg_fd = prg_fd; |
| spc.do_record = do_record; |
| spc.write_mutex = &spc_write_mutex; |
| spc.shared_progress = sp; |
| spc.fi = &fi_args; |
| ret = pthread_create(&t_prog, NULL, scrub_progress_cycle, &spc); |
| if (ret) { |
| if (do_print) |
| fprintf(stderr, "ERROR: creating progress thread " |
| "failed: %s\n", strerror(ret)); |
| err = 1; |
| goto out; |
| } |
| |
| err = 0; |
| for (i = 0; i < fi_args.num_devices; ++i) { |
| if (sp[i].skip) |
| continue; |
| devid = di_args[i].devid; |
| ret = pthread_join(t_devs[i], NULL); |
| if (ret) { |
| if (do_print) |
| fprintf(stderr, "ERROR: pthread_join failed " |
| "for scrub_one_dev[%llu]: %s\n", devid, |
| strerror(ret)); |
| ++err; |
| continue; |
| } |
| if (sp[i].ret && sp[i].ioctl_errno == ENODEV) { |
| if (do_print) |
| fprintf(stderr, "WARNING: device %lld not " |
| "present\n", devid); |
| continue; |
| } |
| if (sp[i].ret && sp[i].ioctl_errno == ECANCELED) { |
| ++err; |
| } else if (sp[i].ret) { |
| if (do_print) |
| fprintf(stderr, "ERROR: scrubbing %s failed " |
| "for device id %lld (%s)\n", path, |
| devid, strerror(sp[i].ioctl_errno)); |
| ++err; |
| continue; |
| } |
| if (sp[i].scrub_args.progress.uncorrectable_errors > 0) |
| e_uncorrectable++; |
| if (sp[i].scrub_args.progress.corrected_errors > 0 |
| || sp[i].scrub_args.progress.unverified_errors > 0) |
| e_correctable++; |
| } |
| |
| if (do_print) { |
| const char *append = "done"; |
| if (!do_stats_per_dev) |
| init_fs_stat(&fs_stat); |
| for (i = 0; i < fi_args.num_devices; ++i) { |
| if (do_stats_per_dev) { |
| print_scrub_dev(&di_args[i], |
| &sp[i].scrub_args.progress, |
| print_raw, |
| sp[i].ret ? "canceled" : "done", |
| &sp[i].stats); |
| } else { |
| if (sp[i].ret) |
| append = "canceled"; |
| add_to_fs_stat(&sp[i].scrub_args.progress, |
| &sp[i].stats, &fs_stat); |
| } |
| } |
| if (!do_stats_per_dev) { |
| printf("scrub %s for %s\n", append, fsid); |
| print_fs_stat(&fs_stat, print_raw); |
| } |
| } |
| |
| ret = pthread_cancel(t_prog); |
| if (!ret) |
| ret = pthread_join(t_prog, &terr); |
| |
| /* check for errors from the handling of the progress thread */ |
| if (do_print && ret) { |
| fprintf(stderr, "ERROR: progress thread handling failed: %s\n", |
| strerror(ret)); |
| } |
| |
| /* check for errors returned from the progress thread itself */ |
| if (do_print && terr && terr != PTHREAD_CANCELED) { |
| fprintf(stderr, "ERROR: recording progress " |
| "failed: %s\n", strerror(-PTR_ERR(terr))); |
| } |
| |
| if (do_record) { |
| ret = scrub_write_progress(&spc_write_mutex, fsid, sp, |
| fi_args.num_devices); |
| if (ret && do_print) { |
| fprintf(stderr, "ERROR: failed to record the result: " |
| "%s\n", strerror(-ret)); |
| } |
| } |
| |
| scrub_handle_sigint_child(-1); |
| |
| out: |
| free_history(past_scrubs); |
| free(di_args); |
| free(t_devs); |
| free(sp); |
| free(spc.progress); |
| if (prg_fd > -1) { |
| close(prg_fd); |
| if (sock_path[0]) |
| unlink(sock_path); |
| } |
| close_file_or_dir(fdmnt, dirstream); |
| |
| if (err) |
| return 1; |
| if (nothing_to_resume) |
| return 2; |
| if (e_uncorrectable) { |
| ERR(!do_quiet, "ERROR: There are uncorrectable errors.\n"); |
| return 3; |
| } |
| if (e_correctable) |
| ERR(!do_quiet, "WARNING: errors detected during scrubbing, corrected.\n"); |
| |
| return 0; |
| } |
| |
| static const char * const cmd_scrub_start_usage[] = { |
| "btrfs scrub start [-BdqrRf] [-c ioprio_class -n ioprio_classdata] <path>|<device>", |
| "Start a new scrub. If a scrub is already running, the new one fails.", |
| "", |
| "-B do not background", |
| "-d stats per device (-B only)", |
| "-q be quiet", |
| "-r read only mode", |
| "-R raw print mode, print full data instead of summary", |
| "-c set ioprio class (see ionice(1) manpage)", |
| "-n set ioprio classdata (see ionice(1) manpage)", |
| "-f force starting new scrub even if a scrub is already running", |
| " this is useful when scrub stats record file is damaged", |
| NULL |
| }; |
| |
| static int cmd_scrub_start(int argc, char **argv) |
| { |
| return scrub_start(argc, argv, 0); |
| } |
| |
| static const char * const cmd_scrub_cancel_usage[] = { |
| "btrfs scrub cancel <path>|<device>", |
| "Cancel a running scrub", |
| NULL |
| }; |
| |
| static int cmd_scrub_cancel(int argc, char **argv) |
| { |
| char *path; |
| int ret; |
| int fdmnt = -1; |
| DIR *dirstream = NULL; |
| |
| if (check_argc_exact(argc, 2)) |
| usage(cmd_scrub_cancel_usage); |
| |
| path = argv[1]; |
| |
| fdmnt = open_path_or_dev_mnt(path, &dirstream); |
| if (fdmnt < 0) { |
| if (errno == EINVAL) |
| fprintf(stderr, |
| "ERROR: '%s' is not a mounted btrfs device\n", |
| path); |
| else |
| fprintf(stderr, "ERROR: can't access '%s': %s\n", |
| path, strerror(errno)); |
| ret = 1; |
| goto out; |
| } |
| |
| ret = ioctl(fdmnt, BTRFS_IOC_SCRUB_CANCEL, NULL); |
| |
| if (ret < 0) { |
| fprintf(stderr, "ERROR: scrub cancel failed on %s: %s\n", path, |
| errno == ENOTCONN ? "not running" : strerror(errno)); |
| if (errno == ENOTCONN) |
| ret = 2; |
| else |
| ret = 1; |
| goto out; |
| } |
| |
| ret = 0; |
| printf("scrub cancelled\n"); |
| |
| out: |
| close_file_or_dir(fdmnt, dirstream); |
| return ret; |
| } |
| |
| static const char * const cmd_scrub_resume_usage[] = { |
| "btrfs scrub resume [-BdqrR] [-c ioprio_class -n ioprio_classdata] <path>|<device>", |
| "Resume previously canceled or interrupted scrub", |
| "", |
| "-B do not background", |
| "-d stats per device (-B only)", |
| "-q be quiet", |
| "-r read only mode", |
| "-R raw print mode, print full data instead of summary", |
| "-c set ioprio class (see ionice(1) manpage)", |
| "-n set ioprio classdata (see ionice(1) manpage)", |
| NULL |
| }; |
| |
| static int cmd_scrub_resume(int argc, char **argv) |
| { |
| return scrub_start(argc, argv, 1); |
| } |
| |
| static const char * const cmd_scrub_status_usage[] = { |
| "btrfs scrub status [-dR] <path>|<device>", |
| "Show status of running or finished scrub", |
| "", |
| "-d stats per device", |
| "-R print raw stats", |
| NULL |
| }; |
| |
| static int cmd_scrub_status(int argc, char **argv) |
| { |
| char *path; |
| struct btrfs_ioctl_fs_info_args fi_args; |
| struct btrfs_ioctl_dev_info_args *di_args = NULL; |
| struct scrub_file_record **past_scrubs = NULL; |
| struct scrub_file_record *last_scrub; |
| struct scrub_fs_stat fs_stat; |
| struct sockaddr_un addr = { |
| .sun_family = AF_UNIX, |
| }; |
| int in_progress; |
| int ret; |
| int i; |
| int fdmnt; |
| int print_raw = 0; |
| int do_stats_per_dev = 0; |
| int c; |
| char fsid[BTRFS_UUID_UNPARSED_SIZE]; |
| int fdres = -1; |
| int err = 0; |
| DIR *dirstream = NULL; |
| |
| optind = 1; |
| while ((c = getopt(argc, argv, "dR")) != -1) { |
| switch (c) { |
| case 'd': |
| do_stats_per_dev = 1; |
| break; |
| case 'R': |
| print_raw = 1; |
| break; |
| case '?': |
| default: |
| usage(cmd_scrub_status_usage); |
| } |
| } |
| |
| if (check_argc_exact(argc - optind, 1)) |
| usage(cmd_scrub_status_usage); |
| |
| path = argv[optind]; |
| |
| fdmnt = open_path_or_dev_mnt(path, &dirstream); |
| |
| if (fdmnt < 0) { |
| if (errno == EINVAL) |
| fprintf(stderr, |
| "ERROR: '%s' is not a mounted btrfs device\n", |
| path); |
| else |
| fprintf(stderr, "ERROR: can't access '%s': %s\n", |
| path, strerror(errno)); |
| return 1; |
| } |
| |
| ret = get_fs_info(path, &fi_args, &di_args); |
| if (ret) { |
| fprintf(stderr, "ERROR: getting dev info for scrub failed: " |
| "%s\n", strerror(-ret)); |
| err = 1; |
| goto out; |
| } |
| if (!fi_args.num_devices) { |
| fprintf(stderr, "ERROR: no devices found\n"); |
| err = 1; |
| goto out; |
| } |
| |
| uuid_unparse(fi_args.fsid, fsid); |
| |
| fdres = socket(AF_UNIX, SOCK_STREAM, 0); |
| if (fdres == -1) { |
| fprintf(stderr, "ERROR: failed to create socket to " |
| "receive progress information: %s\n", |
| strerror(errno)); |
| err = 1; |
| goto out; |
| } |
| scrub_datafile(SCRUB_PROGRESS_SOCKET_PATH, fsid, |
| NULL, addr.sun_path, sizeof(addr.sun_path)); |
| /* ignore EOVERFLOW, just use shorter name and hope for the best */ |
| addr.sun_path[sizeof(addr.sun_path) - 1] = '\0'; |
| ret = connect(fdres, (struct sockaddr *)&addr, sizeof(addr)); |
| if (ret == -1) { |
| close(fdres); |
| fdres = scrub_open_file_r(SCRUB_DATA_FILE, fsid); |
| if (fdres < 0 && fdres != -ENOENT) { |
| fprintf(stderr, "WARNING: failed to open status file: " |
| "%s\n", strerror(-fdres)); |
| err = 1; |
| goto out; |
| } |
| } |
| |
| if (fdres >= 0) { |
| past_scrubs = scrub_read_file(fdres, 1); |
| if (IS_ERR(past_scrubs)) |
| fprintf(stderr, "WARNING: failed to read status: %s\n", |
| strerror(-PTR_ERR(past_scrubs))); |
| } |
| in_progress = is_scrub_running_in_kernel(fdmnt, di_args, fi_args.num_devices); |
| |
| printf("scrub status for %s\n", fsid); |
| |
| if (do_stats_per_dev) { |
| for (i = 0; i < fi_args.num_devices; ++i) { |
| last_scrub = last_dev_scrub(past_scrubs, |
| di_args[i].devid); |
| if (!last_scrub) { |
| print_scrub_dev(&di_args[i], NULL, print_raw, |
| NULL, NULL); |
| continue; |
| } |
| last_scrub->stats.in_progress = in_progress; |
| print_scrub_dev(&di_args[i], &last_scrub->p, print_raw, |
| last_scrub->stats.finished ? |
| "history" : "status", |
| &last_scrub->stats); |
| } |
| } else { |
| init_fs_stat(&fs_stat); |
| fs_stat.s.in_progress = in_progress; |
| for (i = 0; i < fi_args.num_devices; ++i) { |
| last_scrub = last_dev_scrub(past_scrubs, |
| di_args[i].devid); |
| if (!last_scrub) |
| continue; |
| add_to_fs_stat(&last_scrub->p, &last_scrub->stats, |
| &fs_stat); |
| } |
| print_fs_stat(&fs_stat, print_raw); |
| } |
| |
| out: |
| free_history(past_scrubs); |
| free(di_args); |
| if (fdres > -1) |
| close(fdres); |
| close_file_or_dir(fdmnt, dirstream); |
| |
| return !!err; |
| } |
| |
| static const char scrub_cmd_group_info[] = |
| "verify checksums of data and metadata"; |
| |
| const struct cmd_group scrub_cmd_group = { |
| scrub_cmd_group_usage, scrub_cmd_group_info, { |
| { "start", cmd_scrub_start, cmd_scrub_start_usage, NULL, 0 }, |
| { "cancel", cmd_scrub_cancel, cmd_scrub_cancel_usage, NULL, 0 }, |
| { "resume", cmd_scrub_resume, cmd_scrub_resume_usage, NULL, 0 }, |
| { "status", cmd_scrub_status, cmd_scrub_status_usage, NULL, 0 }, |
| NULL_CMD_STRUCT |
| } |
| }; |
| |
| int cmd_scrub(int argc, char **argv) |
| { |
| return handle_command_group(&scrub_cmd_group, argc, argv); |
| } |