From 358564890ac230ccc8af2661268a6bcb0d6ea18f Mon Sep 17 00:00:00 2001 From: Chris Mason Date: Tue, 22 Apr 2008 14:06:31 -0400 Subject: [PATCH] Add a command to show all of the btrfs filesystems on the box (btrfs-show) --- Makefile | 5 +- btrfs-show.c | 148 +++++++++++++++++++++++++++++++++++++++++++++++++++++++++++ disk-io.c | 2 - mkfs.c | 16 ++++--- utils.c | 26 +++++++++++ utils.h | 1 + volumes.c | 27 +++++------ volumes.h | 6 +++ 8 files changed, 209 insertions(+), 22 deletions(-) create mode 100644 btrfs-show.c diff --git a/Makefile b/Makefile index 63fddcf..e6fbf62 100644 --- a/Makefile +++ b/Makefile @@ -15,7 +15,7 @@ prefix ?= /usr/local bindir = $(prefix)/bin LIBS=-luuid -progs = btrfsctl btrfsck mkfs.btrfs debug-tree quick-test +progs = btrfsctl btrfsck mkfs.btrfs debug-tree quick-test btrfs-show # make C=1 to enable sparse ifdef C @@ -34,6 +34,9 @@ all: $(progs) btrfsctl: $(objects) btrfsctl.o gcc $(CFLAGS) -o btrfsctl btrfsctl.o $(objects) $(LDFLAGS) $(LIBS) +btrfs-show: $(objects) btrfs-show.o + gcc $(CFLAGS) -o btrfs-show btrfs-show.o $(objects) $(LDFLAGS) $(LIBS) + btrfsck: $(objects) btrfsck.o bit-radix.o gcc $(CFLAGS) -o btrfsck btrfsck.o $(objects) bit-radix.o $(LDFLAGS) $(LIBS) diff --git a/btrfs-show.c b/btrfs-show.c new file mode 100644 index 0000000..5c370f1 --- /dev/null +++ b/btrfs-show.c @@ -0,0 +1,148 @@ +/* + * Copyright (C) 2007 Oracle. 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. + */ + +#define _GNU_SOURCE +#ifndef __CHECKER__ +#include +#include +#include "ioctl.h" +#endif +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include "kerncompat.h" +#include "ctree.h" +#include "transaction.h" +#include "utils.h" +#include "volumes.h" + +static int uuid_search(struct btrfs_fs_devices *fs_devices, char *search) +{ + struct list_head *cur; + struct btrfs_device *device; + + list_for_each(cur, &fs_devices->devices) { + device = list_entry(cur, struct btrfs_device, dev_list); + if ((device->label && strcmp(device->label, search) == 0) || + strcmp(device->name, search) == 0) + return 1; + } + return 0; +} + +static void print_one_uuid(struct btrfs_fs_devices *fs_devices) +{ + char uuidbuf[37]; + struct list_head *cur; + struct btrfs_device *device; + char *super_bytes_used; + u64 devs_found = 0; + u64 total; + + uuid_unparse(fs_devices->fsid, uuidbuf); + device = list_entry(fs_devices->devices.next, struct btrfs_device, + dev_list); + if (device->label && device->label[0]) + printf("Label: %s ", device->label); + else + printf("Label: none "); + + super_bytes_used = pretty_sizes(device->super_bytes_used); + + total = device->total_devs; + printf(" uuid: %s\n\tTotal devices %llu FS bytes used %s\n", uuidbuf, + (unsigned long long)total, super_bytes_used); + + free(super_bytes_used); + + list_for_each(cur, &fs_devices->devices) { + char *total_bytes; + char *bytes_used; + device = list_entry(cur, struct btrfs_device, dev_list); + total_bytes = pretty_sizes(device->total_bytes); + bytes_used = pretty_sizes(device->bytes_used); + printf("\tdevid %4llu size %s used %s path %s\n", + (unsigned long long)device->devid, + total_bytes, bytes_used, device->name); + free(total_bytes); + free(bytes_used); + devs_found++; + } + if (devs_found < total) { + printf("\t*** Some devices missing\n"); + } + printf("\n"); +} + +static void print_usage(void) +{ + fprintf(stderr, "usage: btrfs-show [search label or device]\n"); + exit(1); +} + +static struct option long_options[] = { + /* { "byte-count", 1, NULL, 'b' }, */ + { 0, 0, 0, 0} +}; + +int main(int ac, char **av) +{ + struct list_head *all_uuids; + struct btrfs_fs_devices *fs_devices; + struct list_head *cur_uuid; + char *search = NULL; + int ret; + int option_index = 0; + + while(1) { + int c; + c = getopt_long(ac, av, "", long_options, + &option_index); + if (c < 0) + break; + switch(c) { + default: + print_usage(); + } + } + ac = ac - optind; + if (ac != 0) { + search = av[optind]; + } + + ret = btrfs_scan_one_dir("/dev", 0); + if (ret) + fprintf(stderr, "error %d while scanning\n", ret); + + all_uuids = btrfs_scanned_uuids(); + list_for_each(cur_uuid, all_uuids) { + fs_devices = list_entry(cur_uuid, struct btrfs_fs_devices, + list); + if (search && uuid_search(fs_devices, search) == 0) + continue; + print_one_uuid(fs_devices); + } + return 0; +} + diff --git a/disk-io.c b/disk-io.c index 3080e62..dc82a96 100644 --- a/disk-io.c +++ b/disk-io.c @@ -493,8 +493,6 @@ struct btrfs_root *open_ctree_fd(int fp, const char *path, u64 sb_bytenr) fprintf(stderr, "No valid Btrfs found on %s\n", path); return NULL; } - fprintf(stderr, "found Btrfs on %s with %lu devices\n", path, - (unsigned long)total_devs); if (total_devs != 1) { ret = btrfs_scan_for_fsid(fs_devices, total_devs, 1); diff --git a/mkfs.c b/mkfs.c index bb2c58e..a629e49 100644 --- a/mkfs.c +++ b/mkfs.c @@ -296,6 +296,7 @@ int main(int ac, char **av) struct btrfs_root *root; struct btrfs_trans_handle *trans; char *label = NULL; + char *first_file; u64 block_count = 0; u64 dev_block_count = 0; u64 blocks[6]; @@ -375,6 +376,7 @@ int main(int ac, char **av) exit(1); } first_fd = fd; + first_file = file; ret = btrfs_prepare_device(fd, file, zero_end, &dev_block_count); if (block_count == 0) block_count = dev_block_count; @@ -394,12 +396,6 @@ int main(int ac, char **av) fprintf(stderr, "failed to setup the root directory\n"); exit(1); } - printf("fs created label %s on %s\n\tnodesize %u leafsize %u " - "sectorsize %u bytes %llu\n", - label, file, nodesize, leafsize, sectorsize, - (unsigned long long)block_count); - - free(label); root = open_ctree(file, 0); trans = btrfs_start_transaction(root, 1); @@ -452,9 +448,17 @@ int main(int ac, char **av) raid_groups: ret = create_raid_groups(trans, root, data_profile, metadata_profile); + + printf("fs created label %s on %s\n\tnodesize %u leafsize %u " + "sectorsize %u size %s\n", + label, first_file, nodesize, leafsize, sectorsize, + pretty_sizes(btrfs_super_total_bytes(&root->fs_info->super_copy))); + btrfs_commit_transaction(trans, root); ret = close_ctree(root); BUG_ON(ret); + + free(label); return 0; } diff --git a/utils.c b/utils.c index b9d85ac..5845903 100644 --- a/utils.c +++ b/utils.c @@ -774,3 +774,29 @@ brelse: out: return ret; } + +static char *size_strs[] = { "", "KB", "MB", "GB", "TB", + "PB", "EB", "ZB", "YB"}; +char *pretty_sizes(u64 size) +{ + int num_divs = 0; + u64 last_size = size; + u64 fract_size = size; + float fraction; + char *pretty; + + while(size > 0) { + fract_size = last_size; + last_size = size; + size /= 1024; + num_divs++; + } + if (num_divs > ARRAY_SIZE(size_strs)) + return NULL; + + fraction = (float)fract_size / 1024; + pretty = malloc(16); + sprintf(pretty, "%.2f%s", fraction, size_strs[num_divs-1]); + return pretty; +} + diff --git a/utils.h b/utils.h index f93f8b3..18707d0 100644 --- a/utils.h +++ b/utils.h @@ -39,4 +39,5 @@ int btrfs_scan_one_dir(char *dirname, int run_ioctl); int check_mounted(char *devicename); int btrfs_device_already_in_root(struct btrfs_root *root, int fd, int super_offset); +char *pretty_sizes(u64 size); #endif diff --git a/volumes.c b/volumes.c index 97aa57a..d3eeaf9 100644 --- a/volumes.c +++ b/volumes.c @@ -119,6 +119,13 @@ static int device_list_add(const char *path, kfree(device); return -ENOMEM; } + device->label = kstrdup(disk_super->label, GFP_NOFS); + device->total_devs = btrfs_super_num_devices(disk_super); + device->super_bytes_used = btrfs_super_bytes_used(disk_super); + device->total_bytes = + btrfs_stack_device_total_bytes(&disk_super->dev_item); + device->bytes_used = + btrfs_stack_device_bytes_used(&disk_super->dev_item); list_add(&device->dev_list, &fs_devices->devices); } @@ -156,13 +163,13 @@ int btrfs_open_devices(struct btrfs_fs_devices *fs_devices, int flags) list_for_each(cur, head) { device = list_entry(cur, struct btrfs_device, dev_list); + fd = open(device->name, flags); -printk("opening %s devid %llu fd %d\n", device->name, - (unsigned long long)device->devid, fd); if (fd < 0) { ret = -errno; goto fail; } + if (device->devid == fs_devices->latest_devid) fs_devices->latest_bdev = fd; if (device->devid == fs_devices->lowest_devid) @@ -205,12 +212,6 @@ int btrfs_scan_one_device(int fd, const char *path, *total_devs = btrfs_super_num_devices(disk_super); uuid_unparse(disk_super->fsid, uuidbuf); - printf("device "); - if (disk_super->label[0]) - printf("label %s ", disk_super->label); - else - printf("fsuuid %s ", uuidbuf); - printf("devid %llu %s\n", (unsigned long long)devid, path); ret = device_list_add(path, disk_super, devid, fs_devices_ret); error_brelse: @@ -764,7 +765,6 @@ again: *num_bytes = chunk_bytes_by_type(type, calc_size, num_stripes, sub_stripes); index = 0; -printk("new chunk type %Lu start %Lu size %Lu\n", type, key.offset, *num_bytes); while(index < num_stripes) { struct btrfs_stripe *stripe; BUG_ON(list_empty(&private_devs)); @@ -781,10 +781,7 @@ printk("new chunk type %Lu start %Lu size %Lu\n", type, key.offset, *num_bytes); BTRFS_FIRST_CHUNK_TREE_OBJECTID, key.offset, calc_size, &dev_offset); BUG_ON(ret); -printk("\talloc chunk size %llu from dev %llu phys %llu\n", - (unsigned long long)calc_size, - (unsigned long long)device->devid, - (unsigned long long)dev_offset); + device->bytes_used += calc_size; ret = btrfs_update_device(trans, device); BUG_ON(ret); @@ -1297,3 +1294,7 @@ error: return ret; } +struct list_head *btrfs_scanned_uuids(void) +{ + return &fs_uuids; +} diff --git a/volumes.h b/volumes.h index 07d1c0a..9aec0e3 100644 --- a/volumes.h +++ b/volumes.h @@ -28,6 +28,11 @@ struct btrfs_device { char *name; + /* these are read off the super block, only in the progs */ + char *label; + u64 total_devs; + u64 super_bytes_used; + /* the internal btrfs device id */ u64 devid; @@ -109,4 +114,5 @@ int btrfs_scan_one_device(int fd, const char *path, int btrfs_num_copies(struct btrfs_mapping_tree *map_tree, u64 logical, u64 len); int btrfs_bootstrap_super_map(struct btrfs_mapping_tree *map_tree, struct btrfs_fs_devices *fs_devices); +struct list_head *btrfs_scanned_uuids(void); #endif -- 2.7.4