mirror of
https://github.com/kdave/btrfs-progs
synced 2024-12-09 08:00:13 +00:00
e4df433b8a
As btrfs is specific to Linux, %m can be used instead of strerror(errno) in format strings. This has some size reduction benefits for embedded systems. glibc, musl, and uclibc-ng all support %m as a modifier to printf. A quick glance at the BIONIC libc source indicates that it has support for %m as well. BSDs and Windows do not but I do believe them to be beyond the scope of btrfs-progs. Compiled sizes on Ubuntu 16.04: Before: 3916512 btrfs 233688 libbtrfs.so.0.1 4899 bcp 2367672 btrfs-convert 2208488 btrfs-corrupt-block 13302 btrfs-debugfs 2152160 btrfs-debug-tree 2136024 btrfs-find-root 2287592 btrfs-image 2144600 btrfs-map-logical 2130760 btrfs-select-super 2152608 btrfstune 2131760 btrfs-zero-log 2277752 mkfs.btrfs 9166 show-blocks After: 3908744 btrfs 233256 libbtrfs.so.0.1 4899 bcp 2366560 btrfs-convert 2207432 btrfs-corrupt-block 13302 btrfs-debugfs 2151104 btrfs-debug-tree 2134968 btrfs-find-root 2281864 btrfs-image 2143536 btrfs-map-logical 2129704 btrfs-select-super 2151552 btrfstune 2130696 btrfs-zero-log 2276272 mkfs.btrfs 9166 show-blocks Total savings: 23928 (24 kilo)bytes Signed-off-by: Rosen Penev <rosenp@gmail.com> Signed-off-by: David Sterba <dsterba@suse.com>
941 lines
24 KiB
C
941 lines
24 KiB
C
/*
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* This program is free software; you can redistribute it and/or
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* modify it under the terms of the GNU General Public
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* License v2 as published by the Free Software Foundation.
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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 GNU
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* 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
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* License along with this program; if not, write to the
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* Free Software Foundation, Inc., 59 Temple Place - Suite 330,
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* Boston, MA 021110-1307, USA.
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*/
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#include <stdio.h>
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#include <stdlib.h>
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#include <string.h>
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#include <unistd.h>
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#include <getopt.h>
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#include <sys/ioctl.h>
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#include <sys/types.h>
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#include <sys/stat.h>
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#include <fcntl.h>
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#include <errno.h>
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#include "kerncompat.h"
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#include "ctree.h"
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#include "ioctl.h"
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#include "volumes.h"
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#include "commands.h"
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#include "utils.h"
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#include "help.h"
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static const char * const balance_cmd_group_usage[] = {
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"btrfs balance <command> [options] <path>",
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"btrfs balance <path>",
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NULL
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};
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static int parse_one_profile(const char *profile, u64 *flags)
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{
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if (!strcmp(profile, "raid0")) {
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*flags |= BTRFS_BLOCK_GROUP_RAID0;
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} else if (!strcmp(profile, "raid1")) {
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*flags |= BTRFS_BLOCK_GROUP_RAID1;
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} else if (!strcmp(profile, "raid10")) {
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*flags |= BTRFS_BLOCK_GROUP_RAID10;
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} else if (!strcmp(profile, "raid5")) {
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*flags |= BTRFS_BLOCK_GROUP_RAID5;
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} else if (!strcmp(profile, "raid6")) {
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*flags |= BTRFS_BLOCK_GROUP_RAID6;
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} else if (!strcmp(profile, "dup")) {
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*flags |= BTRFS_BLOCK_GROUP_DUP;
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} else if (!strcmp(profile, "single")) {
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*flags |= BTRFS_AVAIL_ALLOC_BIT_SINGLE;
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} else {
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error("unknown profile: %s", profile);
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return 1;
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}
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return 0;
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}
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static int parse_profiles(char *profiles, u64 *flags)
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{
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char *this_char;
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char *save_ptr = NULL; /* Satisfy static checkers */
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for (this_char = strtok_r(profiles, "|", &save_ptr);
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this_char != NULL;
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this_char = strtok_r(NULL, "|", &save_ptr)) {
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if (parse_one_profile(this_char, flags))
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return 1;
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}
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return 0;
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}
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static int parse_u64(const char *str, u64 *result)
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{
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char *endptr;
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u64 val;
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val = strtoull(str, &endptr, 10);
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if (*endptr)
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return 1;
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*result = val;
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return 0;
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}
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/*
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* Parse range that's missing some part that can be implicit:
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* a..b - exact range, a can be equal to b
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* a.. - implicitly unbounded maximum (end == (u64)-1)
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* ..b - implicitly starting at 0
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* a - invalid; unclear semantics, use parse_u64 instead
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*
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* Returned values are u64, value validation and interpretation should be done
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* by the caller.
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*/
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static int parse_range(const char *range, u64 *start, u64 *end)
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{
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char *dots;
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char *endptr;
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const char *rest;
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int skipped = 0;
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dots = strstr(range, "..");
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if (!dots)
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return 1;
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rest = dots + 2;
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if (!*rest) {
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*end = (u64)-1;
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skipped++;
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} else {
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*end = strtoull(rest, &endptr, 10);
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if (*endptr)
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return 1;
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}
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if (dots == range) {
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*start = 0;
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skipped++;
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} else {
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*start = strtoull(range, &endptr, 10);
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if (*endptr != 0 && *endptr != '.')
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return 1;
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}
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if (*start > *end) {
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error("range %llu..%llu doesn't make sense",
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(unsigned long long)*start,
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(unsigned long long)*end);
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return 1;
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}
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if (skipped <= 1)
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return 0;
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return 1;
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}
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/*
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* Parse range and check if start < end
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*/
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static int parse_range_strict(const char *range, u64 *start, u64 *end)
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{
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if (parse_range(range, start, end) == 0) {
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if (*start >= *end) {
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error("range %llu..%llu not allowed",
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(unsigned long long)*start,
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(unsigned long long)*end);
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return 1;
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}
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return 0;
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}
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return 1;
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}
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/*
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* Convert 64bit range to 32bit with boundary checks
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*/
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static int range_to_u32(u64 start, u64 end, u32 *start32, u32 *end32)
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{
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if (start > (u32)-1)
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return 1;
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if (end != (u64)-1 && end > (u32)-1)
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return 1;
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*start32 = (u32)start;
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*end32 = (u32)end;
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return 0;
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}
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__attribute__ ((unused))
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static int parse_range_u32(const char *range, u32 *start, u32 *end)
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{
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u64 tmp_start;
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u64 tmp_end;
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if (parse_range(range, &tmp_start, &tmp_end))
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return 1;
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if (range_to_u32(tmp_start, tmp_end, start, end))
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return 1;
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return 0;
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}
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__attribute__ ((unused))
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static void print_range(u64 start, u64 end)
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{
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if (start)
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printf("%llu", (unsigned long long)start);
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printf("..");
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if (end != (u64)-1)
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printf("%llu", (unsigned long long)end);
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}
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__attribute__ ((unused))
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static void print_range_u32(u32 start, u32 end)
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{
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if (start)
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printf("%u", start);
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printf("..");
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if (end != (u32)-1)
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printf("%u", end);
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}
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static int parse_filters(char *filters, struct btrfs_balance_args *args)
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{
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char *this_char;
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char *value;
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char *save_ptr = NULL; /* Satisfy static checkers */
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if (!filters)
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return 0;
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for (this_char = strtok_r(filters, ",", &save_ptr);
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this_char != NULL;
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this_char = strtok_r(NULL, ",", &save_ptr)) {
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if ((value = strchr(this_char, '=')) != NULL)
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*value++ = 0;
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if (!strcmp(this_char, "profiles")) {
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if (!value || !*value) {
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error("the profiles filter requires an argument");
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return 1;
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}
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if (parse_profiles(value, &args->profiles)) {
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error("invalid profiles argument");
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return 1;
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}
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args->flags |= BTRFS_BALANCE_ARGS_PROFILES;
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} else if (!strcmp(this_char, "usage")) {
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if (!value || !*value) {
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error("the usage filter requires an argument");
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return 1;
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}
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if (parse_u64(value, &args->usage)) {
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if (parse_range_u32(value, &args->usage_min,
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&args->usage_max)) {
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error("invalid usage argument: %s",
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value);
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return 1;
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}
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if (args->usage_max > 100) {
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error("invalid usage argument: %s",
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value);
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}
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args->flags &= ~BTRFS_BALANCE_ARGS_USAGE;
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args->flags |= BTRFS_BALANCE_ARGS_USAGE_RANGE;
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} else {
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if (args->usage > 100) {
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error("invalid usage argument: %s",
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value);
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return 1;
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}
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args->flags &= ~BTRFS_BALANCE_ARGS_USAGE_RANGE;
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args->flags |= BTRFS_BALANCE_ARGS_USAGE;
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}
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args->flags |= BTRFS_BALANCE_ARGS_USAGE;
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} else if (!strcmp(this_char, "devid")) {
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if (!value || !*value) {
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error("the devid filter requires an argument");
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return 1;
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}
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if (parse_u64(value, &args->devid) || args->devid == 0) {
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error("invalid devid argument: %s", value);
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return 1;
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}
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args->flags |= BTRFS_BALANCE_ARGS_DEVID;
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} else if (!strcmp(this_char, "drange")) {
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if (!value || !*value) {
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error("the drange filter requires an argument");
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return 1;
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}
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if (parse_range_strict(value, &args->pstart, &args->pend)) {
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error("invalid drange argument");
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return 1;
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}
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args->flags |= BTRFS_BALANCE_ARGS_DRANGE;
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} else if (!strcmp(this_char, "vrange")) {
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if (!value || !*value) {
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error("the vrange filter requires an argument");
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return 1;
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}
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if (parse_range_strict(value, &args->vstart, &args->vend)) {
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error("invalid vrange argument");
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return 1;
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}
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args->flags |= BTRFS_BALANCE_ARGS_VRANGE;
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} else if (!strcmp(this_char, "convert")) {
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if (!value || !*value) {
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error("the convert option requires an argument");
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return 1;
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}
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if (parse_one_profile(value, &args->target)) {
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error("invalid convert argument");
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return 1;
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}
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args->flags |= BTRFS_BALANCE_ARGS_CONVERT;
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} else if (!strcmp(this_char, "soft")) {
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args->flags |= BTRFS_BALANCE_ARGS_SOFT;
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} else if (!strcmp(this_char, "limit")) {
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if (!value || !*value) {
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error("the limit filter requires an argument");
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return 1;
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}
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if (parse_u64(value, &args->limit)) {
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if (parse_range_u32(value, &args->limit_min,
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&args->limit_max)) {
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error("Invalid limit argument: %s",
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value);
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return 1;
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}
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args->flags &= ~BTRFS_BALANCE_ARGS_LIMIT;
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args->flags |= BTRFS_BALANCE_ARGS_LIMIT_RANGE;
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} else {
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args->flags &= ~BTRFS_BALANCE_ARGS_LIMIT_RANGE;
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args->flags |= BTRFS_BALANCE_ARGS_LIMIT;
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}
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} else if (!strcmp(this_char, "stripes")) {
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if (!value || !*value) {
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error("the stripes filter requires an argument");
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return 1;
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}
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if (parse_range_u32(value, &args->stripes_min,
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&args->stripes_max)) {
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error("invalid stripes argument");
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return 1;
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}
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args->flags |= BTRFS_BALANCE_ARGS_STRIPES_RANGE;
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} else {
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error("unrecognized balance option: %s", this_char);
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return 1;
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}
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}
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return 0;
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}
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static void dump_balance_args(struct btrfs_balance_args *args)
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{
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if (args->flags & BTRFS_BALANCE_ARGS_CONVERT) {
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printf("converting, target=%llu, soft is %s",
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(unsigned long long)args->target,
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(args->flags & BTRFS_BALANCE_ARGS_SOFT) ? "on" : "off");
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} else {
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printf("balancing");
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}
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if (args->flags & BTRFS_BALANCE_ARGS_PROFILES)
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printf(", profiles=%llu", (unsigned long long)args->profiles);
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if (args->flags & BTRFS_BALANCE_ARGS_USAGE)
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printf(", usage=%llu", (unsigned long long)args->usage);
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if (args->flags & BTRFS_BALANCE_ARGS_USAGE_RANGE) {
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printf(", usage=");
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print_range_u32(args->usage_min, args->usage_max);
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}
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if (args->flags & BTRFS_BALANCE_ARGS_DEVID)
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printf(", devid=%llu", (unsigned long long)args->devid);
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if (args->flags & BTRFS_BALANCE_ARGS_DRANGE)
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printf(", drange=%llu..%llu",
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(unsigned long long)args->pstart,
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(unsigned long long)args->pend);
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if (args->flags & BTRFS_BALANCE_ARGS_VRANGE)
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printf(", vrange=%llu..%llu",
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(unsigned long long)args->vstart,
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(unsigned long long)args->vend);
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if (args->flags & BTRFS_BALANCE_ARGS_LIMIT)
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printf(", limit=%llu", (unsigned long long)args->limit);
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if (args->flags & BTRFS_BALANCE_ARGS_LIMIT_RANGE) {
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printf(", limit=");
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print_range_u32(args->limit_min, args->limit_max);
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}
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if (args->flags & BTRFS_BALANCE_ARGS_STRIPES_RANGE) {
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printf(", stripes=");
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print_range_u32(args->stripes_min, args->stripes_max);
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}
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printf("\n");
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}
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static void dump_ioctl_balance_args(struct btrfs_ioctl_balance_args *args)
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{
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printf("Dumping filters: flags 0x%llx, state 0x%llx, force is %s\n",
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(unsigned long long)args->flags, (unsigned long long)args->state,
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(args->flags & BTRFS_BALANCE_FORCE) ? "on" : "off");
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if (args->flags & BTRFS_BALANCE_DATA) {
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printf(" DATA (flags 0x%llx): ",
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(unsigned long long)args->data.flags);
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dump_balance_args(&args->data);
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}
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if (args->flags & BTRFS_BALANCE_METADATA) {
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printf(" METADATA (flags 0x%llx): ",
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(unsigned long long)args->meta.flags);
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dump_balance_args(&args->meta);
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}
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if (args->flags & BTRFS_BALANCE_SYSTEM) {
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printf(" SYSTEM (flags 0x%llx): ",
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(unsigned long long)args->sys.flags);
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dump_balance_args(&args->sys);
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}
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}
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static int do_balance_v1(int fd)
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{
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struct btrfs_ioctl_vol_args args;
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int ret;
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memset(&args, 0, sizeof(args));
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ret = ioctl(fd, BTRFS_IOC_BALANCE, &args);
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return ret;
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}
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enum {
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BALANCE_START_FILTERS = 1 << 0,
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BALANCE_START_NOWARN = 1 << 1
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};
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static int do_balance(const char *path, struct btrfs_ioctl_balance_args *args,
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unsigned flags)
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{
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int fd;
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int ret;
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DIR *dirstream = NULL;
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fd = btrfs_open_dir(path, &dirstream, 1);
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if (fd < 0)
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return 1;
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if (!(flags & BALANCE_START_FILTERS) && !(flags & BALANCE_START_NOWARN)) {
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int delay = 10;
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printf("WARNING:\n\n");
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printf("\tFull balance without filters requested. This operation is very\n");
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printf("\tintense and takes potentially very long. It is recommended to\n");
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printf("\tuse the balance filters to narrow down the scope of balance.\n");
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printf("\tUse 'btrfs balance start --full-balance' option to skip this\n");
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printf("\twarning. The operation will start in %d seconds.\n", delay);
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printf("\tUse Ctrl-C to stop it.\n");
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while (delay) {
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printf("%2d", delay--);
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fflush(stdout);
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sleep(1);
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}
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printf("\nStarting balance without any filters.\n");
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}
|
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|
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ret = ioctl(fd, BTRFS_IOC_BALANCE_V2, args);
|
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if (ret < 0) {
|
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/*
|
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* older kernels don't have the new balance ioctl, try the
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* old one. But, the old one doesn't know any filters, so
|
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* don't fall back if they tried to use the fancy new things
|
|
*/
|
|
if (errno == ENOTTY && !(flags & BALANCE_START_FILTERS)) {
|
|
ret = do_balance_v1(fd);
|
|
if (ret == 0)
|
|
goto out;
|
|
}
|
|
|
|
if (errno == ECANCELED) {
|
|
if (args->state & BTRFS_BALANCE_STATE_PAUSE_REQ)
|
|
fprintf(stderr, "balance paused by user\n");
|
|
if (args->state & BTRFS_BALANCE_STATE_CANCEL_REQ)
|
|
fprintf(stderr, "balance canceled by user\n");
|
|
ret = 0;
|
|
} else {
|
|
error("error during balancing '%s': %m", path);
|
|
if (errno != EINPROGRESS)
|
|
fprintf(stderr,
|
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"There may be more info in syslog - try dmesg | tail\n");
|
|
ret = 1;
|
|
}
|
|
} else {
|
|
printf("Done, had to relocate %llu out of %llu chunks\n",
|
|
(unsigned long long)args->stat.completed,
|
|
(unsigned long long)args->stat.considered);
|
|
ret = 0;
|
|
}
|
|
|
|
out:
|
|
close_file_or_dir(fd, dirstream);
|
|
return ret;
|
|
}
|
|
|
|
static const char * const cmd_balance_start_usage[] = {
|
|
"btrfs balance start [options] <path>",
|
|
"Balance chunks across the devices",
|
|
"Balance and/or convert (change allocation profile of) chunks that",
|
|
"passed all filters in a comma-separated list of filters for a",
|
|
"particular chunk type. If filter list is not given balance all",
|
|
"chunks of that type. In case none of the -d, -m or -s options is",
|
|
"given balance all chunks in a filesystem. This is potentially",
|
|
"long operation and the user is warned before this start, with",
|
|
"a delay to stop it.",
|
|
"",
|
|
"-d[filters] act on data chunks",
|
|
"-m[filters] act on metadata chunks",
|
|
"-s[filters] act on system chunks (only under -f)",
|
|
"-v be verbose",
|
|
"-f force reducing of metadata integrity",
|
|
"--full-balance do not print warning and do not delay start",
|
|
"--background|--bg",
|
|
" run the balance as a background process",
|
|
NULL
|
|
};
|
|
|
|
static int cmd_balance_start(int argc, char **argv)
|
|
{
|
|
struct btrfs_ioctl_balance_args args;
|
|
struct btrfs_balance_args *ptrs[] = { &args.data, &args.sys,
|
|
&args.meta, NULL };
|
|
int force = 0;
|
|
int verbose = 0;
|
|
int background = 0;
|
|
unsigned start_flags = 0;
|
|
int i;
|
|
|
|
memset(&args, 0, sizeof(args));
|
|
|
|
while (1) {
|
|
enum { GETOPT_VAL_FULL_BALANCE = 256,
|
|
GETOPT_VAL_BACKGROUND = 257 };
|
|
static const struct option longopts[] = {
|
|
{ "data", optional_argument, NULL, 'd'},
|
|
{ "metadata", optional_argument, NULL, 'm' },
|
|
{ "system", optional_argument, NULL, 's' },
|
|
{ "force", no_argument, NULL, 'f' },
|
|
{ "verbose", no_argument, NULL, 'v' },
|
|
{ "full-balance", no_argument, NULL,
|
|
GETOPT_VAL_FULL_BALANCE },
|
|
{ "background", no_argument, NULL,
|
|
GETOPT_VAL_BACKGROUND },
|
|
{ "bg", no_argument, NULL, GETOPT_VAL_BACKGROUND },
|
|
{ NULL, 0, NULL, 0 }
|
|
};
|
|
|
|
int opt = getopt_long(argc, argv, "d::s::m::fv", longopts, NULL);
|
|
if (opt < 0)
|
|
break;
|
|
|
|
switch (opt) {
|
|
case 'd':
|
|
start_flags |= BALANCE_START_FILTERS;
|
|
args.flags |= BTRFS_BALANCE_DATA;
|
|
|
|
if (parse_filters(optarg, &args.data))
|
|
return 1;
|
|
break;
|
|
case 's':
|
|
start_flags |= BALANCE_START_FILTERS;
|
|
args.flags |= BTRFS_BALANCE_SYSTEM;
|
|
|
|
if (parse_filters(optarg, &args.sys))
|
|
return 1;
|
|
break;
|
|
case 'm':
|
|
start_flags |= BALANCE_START_FILTERS;
|
|
args.flags |= BTRFS_BALANCE_METADATA;
|
|
|
|
if (parse_filters(optarg, &args.meta))
|
|
return 1;
|
|
break;
|
|
case 'f':
|
|
force = 1;
|
|
break;
|
|
case 'v':
|
|
verbose = 1;
|
|
break;
|
|
case GETOPT_VAL_FULL_BALANCE:
|
|
start_flags |= BALANCE_START_NOWARN;
|
|
break;
|
|
case GETOPT_VAL_BACKGROUND:
|
|
background = 1;
|
|
break;
|
|
default:
|
|
usage(cmd_balance_start_usage);
|
|
}
|
|
}
|
|
|
|
if (check_argc_exact(argc - optind, 1))
|
|
usage(cmd_balance_start_usage);
|
|
|
|
/*
|
|
* allow -s only under --force, otherwise do with system chunks
|
|
* the same thing we were ordered to do with meta chunks
|
|
*/
|
|
if (args.flags & BTRFS_BALANCE_SYSTEM) {
|
|
if (!force) {
|
|
error(
|
|
"Refusing to explicitly operate on system chunks.\n"
|
|
"Pass --force if you really want to do that.");
|
|
return 1;
|
|
}
|
|
} else if (args.flags & BTRFS_BALANCE_METADATA) {
|
|
args.flags |= BTRFS_BALANCE_SYSTEM;
|
|
memcpy(&args.sys, &args.meta,
|
|
sizeof(struct btrfs_balance_args));
|
|
}
|
|
|
|
if (!(start_flags & BALANCE_START_FILTERS)) {
|
|
/* relocate everything - no filters */
|
|
args.flags |= BTRFS_BALANCE_TYPE_MASK;
|
|
}
|
|
|
|
/* drange makes sense only when devid is set */
|
|
for (i = 0; ptrs[i]; i++) {
|
|
if ((ptrs[i]->flags & BTRFS_BALANCE_ARGS_DRANGE) &&
|
|
!(ptrs[i]->flags & BTRFS_BALANCE_ARGS_DEVID)) {
|
|
error("drange filter must be used with devid filter");
|
|
return 1;
|
|
}
|
|
}
|
|
|
|
/* soft makes sense only when convert for corresponding type is set */
|
|
for (i = 0; ptrs[i]; i++) {
|
|
if ((ptrs[i]->flags & BTRFS_BALANCE_ARGS_SOFT) &&
|
|
!(ptrs[i]->flags & BTRFS_BALANCE_ARGS_CONVERT)) {
|
|
error("'soft' option can be used only when converting profiles");
|
|
return 1;
|
|
}
|
|
}
|
|
|
|
if (force)
|
|
args.flags |= BTRFS_BALANCE_FORCE;
|
|
if (verbose)
|
|
dump_ioctl_balance_args(&args);
|
|
if (background) {
|
|
switch (fork()) {
|
|
case (-1):
|
|
error("unable to fork to run balance in background");
|
|
return 1;
|
|
case (0):
|
|
setsid();
|
|
switch(fork()) {
|
|
case (-1):
|
|
error(
|
|
"unable to fork to run balance in background");
|
|
exit(1);
|
|
case (0):
|
|
/*
|
|
* Read the return value to silence compiler
|
|
* warning. Change to / should succeed and
|
|
* we're not in a security-sensitive context.
|
|
*/
|
|
i = chdir("/");
|
|
close(0);
|
|
close(1);
|
|
close(2);
|
|
open("/dev/null", O_RDONLY);
|
|
open("/dev/null", O_WRONLY);
|
|
open("/dev/null", O_WRONLY);
|
|
break;
|
|
default:
|
|
exit(0);
|
|
}
|
|
break;
|
|
default:
|
|
exit(0);
|
|
}
|
|
}
|
|
|
|
return do_balance(argv[optind], &args, start_flags);
|
|
}
|
|
|
|
static const char * const cmd_balance_pause_usage[] = {
|
|
"btrfs balance pause <path>",
|
|
"Pause running balance",
|
|
NULL
|
|
};
|
|
|
|
static int cmd_balance_pause(int argc, char **argv)
|
|
{
|
|
const char *path;
|
|
int fd;
|
|
int ret;
|
|
DIR *dirstream = NULL;
|
|
|
|
clean_args_no_options(argc, argv, cmd_balance_pause_usage);
|
|
|
|
if (check_argc_exact(argc - optind, 1))
|
|
usage(cmd_balance_pause_usage);
|
|
|
|
path = argv[optind];
|
|
|
|
fd = btrfs_open_dir(path, &dirstream, 1);
|
|
if (fd < 0)
|
|
return 1;
|
|
|
|
ret = ioctl(fd, BTRFS_IOC_BALANCE_CTL, BTRFS_BALANCE_CTL_PAUSE);
|
|
if (ret < 0) {
|
|
error("balance pause on '%s' failed: %s", path,
|
|
(errno == ENOTCONN) ? "Not running" : strerror(errno));
|
|
if (errno == ENOTCONN)
|
|
ret = 2;
|
|
else
|
|
ret = 1;
|
|
}
|
|
|
|
close_file_or_dir(fd, dirstream);
|
|
return ret;
|
|
}
|
|
|
|
static const char * const cmd_balance_cancel_usage[] = {
|
|
"btrfs balance cancel <path>",
|
|
"Cancel running or paused balance",
|
|
NULL
|
|
};
|
|
|
|
static int cmd_balance_cancel(int argc, char **argv)
|
|
{
|
|
const char *path;
|
|
int fd;
|
|
int ret;
|
|
DIR *dirstream = NULL;
|
|
|
|
clean_args_no_options(argc, argv, cmd_balance_cancel_usage);
|
|
|
|
if (check_argc_exact(argc - optind, 1))
|
|
usage(cmd_balance_cancel_usage);
|
|
|
|
path = argv[optind];
|
|
|
|
fd = btrfs_open_dir(path, &dirstream, 1);
|
|
if (fd < 0)
|
|
return 1;
|
|
|
|
ret = ioctl(fd, BTRFS_IOC_BALANCE_CTL, BTRFS_BALANCE_CTL_CANCEL);
|
|
if (ret < 0) {
|
|
error("balance cancel on '%s' failed: %s", path,
|
|
(errno == ENOTCONN) ? "Not in progress" : strerror(errno));
|
|
if (errno == ENOTCONN)
|
|
ret = 2;
|
|
else
|
|
ret = 1;
|
|
}
|
|
|
|
close_file_or_dir(fd, dirstream);
|
|
return ret;
|
|
}
|
|
|
|
static const char * const cmd_balance_resume_usage[] = {
|
|
"btrfs balance resume <path>",
|
|
"Resume interrupted balance",
|
|
NULL
|
|
};
|
|
|
|
static int cmd_balance_resume(int argc, char **argv)
|
|
{
|
|
struct btrfs_ioctl_balance_args args;
|
|
const char *path;
|
|
DIR *dirstream = NULL;
|
|
int fd;
|
|
int ret;
|
|
|
|
clean_args_no_options(argc, argv, cmd_balance_resume_usage);
|
|
|
|
if (check_argc_exact(argc - optind, 1))
|
|
usage(cmd_balance_resume_usage);
|
|
|
|
path = argv[optind];
|
|
|
|
fd = btrfs_open_dir(path, &dirstream, 1);
|
|
if (fd < 0)
|
|
return 1;
|
|
|
|
memset(&args, 0, sizeof(args));
|
|
args.flags |= BTRFS_BALANCE_RESUME;
|
|
|
|
ret = ioctl(fd, BTRFS_IOC_BALANCE_V2, &args);
|
|
if (ret < 0) {
|
|
if (errno == ECANCELED) {
|
|
if (args.state & BTRFS_BALANCE_STATE_PAUSE_REQ)
|
|
fprintf(stderr, "balance paused by user\n");
|
|
if (args.state & BTRFS_BALANCE_STATE_CANCEL_REQ)
|
|
fprintf(stderr, "balance canceled by user\n");
|
|
} else if (errno == ENOTCONN || errno == EINPROGRESS) {
|
|
error("balance resume on '%s' failed: %s", path,
|
|
(errno == ENOTCONN) ? "Not in progress" :
|
|
"Already running");
|
|
if (errno == ENOTCONN)
|
|
ret = 2;
|
|
else
|
|
ret = 1;
|
|
} else {
|
|
error("error during balancing '%s': %m\n"
|
|
"There may be more info in syslog - try dmesg | tail",
|
|
path);
|
|
ret = 1;
|
|
}
|
|
} else {
|
|
printf("Done, had to relocate %llu out of %llu chunks\n",
|
|
(unsigned long long)args.stat.completed,
|
|
(unsigned long long)args.stat.considered);
|
|
}
|
|
|
|
close_file_or_dir(fd, dirstream);
|
|
return ret;
|
|
}
|
|
|
|
static const char * const cmd_balance_status_usage[] = {
|
|
"btrfs balance status [-v] <path>",
|
|
"Show status of running or paused balance",
|
|
"",
|
|
"-v be verbose",
|
|
NULL
|
|
};
|
|
|
|
/* Checks the status of the balance if any
|
|
* return codes:
|
|
* 2 : Error failed to know if there is any pending balance
|
|
* 1 : Successful to know status of a pending balance
|
|
* 0 : When there is no pending balance or completed
|
|
*/
|
|
static int cmd_balance_status(int argc, char **argv)
|
|
{
|
|
struct btrfs_ioctl_balance_args args;
|
|
const char *path;
|
|
DIR *dirstream = NULL;
|
|
int fd;
|
|
int verbose = 0;
|
|
int ret;
|
|
|
|
while (1) {
|
|
int opt;
|
|
static const struct option longopts[] = {
|
|
{ "verbose", no_argument, NULL, 'v' },
|
|
{ NULL, 0, NULL, 0 }
|
|
};
|
|
|
|
opt = getopt_long(argc, argv, "v", longopts, NULL);
|
|
if (opt < 0)
|
|
break;
|
|
|
|
switch (opt) {
|
|
case 'v':
|
|
verbose = 1;
|
|
break;
|
|
default:
|
|
usage(cmd_balance_status_usage);
|
|
}
|
|
}
|
|
|
|
if (check_argc_exact(argc - optind, 1))
|
|
usage(cmd_balance_status_usage);
|
|
|
|
path = argv[optind];
|
|
|
|
fd = btrfs_open_dir(path, &dirstream, 1);
|
|
if (fd < 0)
|
|
return 2;
|
|
|
|
ret = ioctl(fd, BTRFS_IOC_BALANCE_PROGRESS, &args);
|
|
if (ret < 0) {
|
|
if (errno == ENOTCONN) {
|
|
printf("No balance found on '%s'\n", path);
|
|
ret = 0;
|
|
goto out;
|
|
}
|
|
error("balance status on '%s' failed: %m", path);
|
|
ret = 2;
|
|
goto out;
|
|
}
|
|
|
|
if (args.state & BTRFS_BALANCE_STATE_RUNNING) {
|
|
printf("Balance on '%s' is running", path);
|
|
if (args.state & BTRFS_BALANCE_STATE_CANCEL_REQ)
|
|
printf(", cancel requested\n");
|
|
else if (args.state & BTRFS_BALANCE_STATE_PAUSE_REQ)
|
|
printf(", pause requested\n");
|
|
else
|
|
printf("\n");
|
|
} else {
|
|
printf("Balance on '%s' is paused\n", path);
|
|
}
|
|
|
|
printf("%llu out of about %llu chunks balanced (%llu considered), "
|
|
"%3.f%% left\n", (unsigned long long)args.stat.completed,
|
|
(unsigned long long)args.stat.expected,
|
|
(unsigned long long)args.stat.considered,
|
|
100 * (1 - (float)args.stat.completed/args.stat.expected));
|
|
|
|
if (verbose)
|
|
dump_ioctl_balance_args(&args);
|
|
|
|
ret = 1;
|
|
out:
|
|
close_file_or_dir(fd, dirstream);
|
|
return ret;
|
|
}
|
|
|
|
static int cmd_balance_full(int argc, char **argv)
|
|
{
|
|
struct btrfs_ioctl_balance_args args;
|
|
|
|
memset(&args, 0, sizeof(args));
|
|
args.flags |= BTRFS_BALANCE_TYPE_MASK;
|
|
|
|
return do_balance(argv[1], &args, BALANCE_START_NOWARN);
|
|
}
|
|
|
|
static const char balance_cmd_group_info[] =
|
|
"balance data across devices, or change block groups using filters";
|
|
|
|
const struct cmd_group balance_cmd_group = {
|
|
balance_cmd_group_usage, balance_cmd_group_info, {
|
|
{ "start", cmd_balance_start, cmd_balance_start_usage, NULL, 0 },
|
|
{ "pause", cmd_balance_pause, cmd_balance_pause_usage, NULL, 0 },
|
|
{ "cancel", cmd_balance_cancel, cmd_balance_cancel_usage, NULL, 0 },
|
|
{ "resume", cmd_balance_resume, cmd_balance_resume_usage, NULL, 0 },
|
|
{ "status", cmd_balance_status, cmd_balance_status_usage, NULL, 0 },
|
|
{ "--full-balance", cmd_balance_full, NULL, NULL, 1 },
|
|
NULL_CMD_STRUCT
|
|
}
|
|
};
|
|
|
|
int cmd_balance(int argc, char **argv)
|
|
{
|
|
if (argc == 2 && strcmp("start", argv[1]) != 0) {
|
|
/* old 'btrfs filesystem balance <path>' syntax */
|
|
struct btrfs_ioctl_balance_args args;
|
|
|
|
memset(&args, 0, sizeof(args));
|
|
args.flags |= BTRFS_BALANCE_TYPE_MASK;
|
|
|
|
return do_balance(argv[1], &args, 0);
|
|
}
|
|
|
|
return handle_command_group(&balance_cmd_group, argc, argv);
|
|
}
|