diff options
| -rw-r--r-- | .gitignore | 3 | ||||
| -rw-r--r-- | INSTALL | 5 | ||||
| -rw-r--r-- | Makefile | 14 | ||||
| -rw-r--r-- | btrfs-show.c | 156 | ||||
| -rw-r--r-- | btrfs-vol.c | 175 | ||||
| -rw-r--r-- | btrfsctl.c | 273 | ||||
| -rw-r--r-- | man/Makefile | 3 | ||||
| -rw-r--r-- | man/btrfs-image.8.in | 2 | ||||
| -rw-r--r-- | man/btrfs-show.8.in | 22 | ||||
| -rw-r--r-- | man/btrfsck.8.in | 1 | ||||
| -rw-r--r-- | man/btrfsctl.8.in | 48 |
11 files changed, 3 insertions, 699 deletions
@@ -8,10 +8,7 @@ btrfs btrfs.static btrfs-debug-tree btrfs-map-logical -btrfs-show -btrfs-vol btrfsck -btrfsctl calc-size ioctl-test dir-test @@ -1,10 +1,5 @@ Install Instructions -Btrfs puts snapshots and subvolumes into the root directory of the FS. This -directory can only be changed by btrfsctl right now, and normal filesystem -operations do not work on it. The default subvolume is called 'default', -and you can create files and directories in mount_point/default - Btrfs uses libcrc32c in the kernel for file and metadata checksums. You need to compile the kernel with: @@ -44,7 +44,7 @@ endif MAKEOPTS = --no-print-directory Q=$(Q) -progs = btrfsctl mkfs.btrfs btrfs-debug-tree btrfs-show btrfs-vol btrfsck \ +progs = mkfs.btrfs btrfs-debug-tree btrfsck \ btrfs btrfs-map-logical btrfs-image btrfs-zero-log btrfs-convert \ btrfs-find-root btrfstune btrfs-show-super @@ -127,18 +127,6 @@ btrfs-find-root.static: $(static_objects) find-root.static.o @echo " [LD] $@" $(Q)$(CC) $(STATIC_CFLAGS) -o btrfs-find-root.static find-root.static.o $(static_objects) $(STATIC_LDFLAGS) $(STATIC_LIBS) -btrfsctl: $(objects) $(libs) btrfsctl.o - @echo " [LD] $@" - $(Q)$(CC) $(CFLAGS) -o btrfsctl btrfsctl.o $(objects) $(LDFLAGS) $(LIBS) - -btrfs-vol: $(objects) $(libs) btrfs-vol.o - @echo " [LD] $@" - $(Q)$(CC) $(CFLAGS) -o btrfs-vol btrfs-vol.o $(objects) $(LDFLAGS) $(LIBS) - -btrfs-show: $(objects) $(libs) btrfs-show.o - @echo " [LD] $@" - $(Q)$(CC) $(CFLAGS) -o btrfs-show btrfs-show.o $(objects) $(LDFLAGS) $(LIBS) - # For backward compatibility, 'btrfs' changes behaviour to fsck if it's named 'btrfsck' btrfsck: btrfs @echo " [LN] $@" diff --git a/btrfs-show.c b/btrfs-show.c deleted file mode 100644 index 8210fd2c..00000000 --- a/btrfs-show.c +++ /dev/null @@ -1,156 +0,0 @@ -/* - * 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 <sys/ioctl.h> -#include <sys/mount.h> -#include "ioctl.h" -#endif -#include <stdio.h> -#include <stdlib.h> -#include <getopt.h> -#include <sys/types.h> -#include <sys/stat.h> -#include <fcntl.h> -#include <unistd.h> -#include <dirent.h> -#include <uuid/uuid.h> -#include "kerncompat.h" -#include "ctree.h" -#include "transaction.h" -#include "utils.h" -#include "volumes.h" -#include "version.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"); - fprintf(stderr, "%s\n", BTRFS_BUILD_VERSION); - 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; - - printf( "**\n" - "** WARNING: this program is considered deprecated\n" - "** Please consider to switch to the btrfs utility\n" - "**\n"); - - 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); - } - printf("%s\n", BTRFS_BUILD_VERSION); - return 0; -} - diff --git a/btrfs-vol.c b/btrfs-vol.c deleted file mode 100644 index e37b41ab..00000000 --- a/btrfs-vol.c +++ /dev/null @@ -1,175 +0,0 @@ -/* - * 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 <sys/ioctl.h> -#include <sys/mount.h> -#include "ioctl.h" -#endif -#include <stdio.h> -#include <stdlib.h> -#include <getopt.h> -#include <sys/types.h> -#include <sys/stat.h> -#include <fcntl.h> -#include <unistd.h> -#include <dirent.h> -#include <uuid/uuid.h> -#include "kerncompat.h" -#include "ctree.h" -#include "transaction.h" -#include "utils.h" -#include "volumes.h" - -#ifdef __CHECKER__ -#define BLKGETSIZE64 0 -#define BTRFS_IOC_SNAP_CREATE 0 -#define BTRFS_IOC_ADD_DEV 0 -#define BTRFS_IOC_RM_DEV 0 -#define BTRFS_VOL_NAME_MAX 255 -struct btrfs_ioctl_vol_args { char name[BTRFS_VOL_NAME_MAX]; }; -static inline int ioctl(int fd, int define, void *arg) { return 0; } -#endif - -static void print_usage(void) -{ - fprintf(stderr, "usage: btrfs-vol [options] mount_point\n"); - fprintf(stderr, "\t-a device add one device\n"); - fprintf(stderr, "\t-b balance chunks across all devices\n"); - fprintf(stderr, "\t-r device remove one device\n"); - exit(1); -} - -static struct option long_options[] = { - /* { "byte-count", 1, NULL, 'b' }, */ - { "add", 1, NULL, 'a' }, - { "balance", 0, NULL, 'b' }, - { "remove", 1, NULL, 'r' }, - { 0, 0, 0, 0} -}; - -int main(int ac, char **av) -{ - struct stat st; - char *device = NULL; - char *mnt = NULL; - int ret; - int option_index = 0; - int cmd = 0; - int fd; - int devfd = 0; - DIR *dirstream; - struct btrfs_ioctl_vol_args args; - u64 dev_block_count = 0; - - printf( "**\n" - "** WARNING: this program is considered deprecated\n" - "** Please consider to switch to the btrfs utility\n" - "**\n"); - - while(1) { - int c; - c = getopt_long(ac, av, "a:br:", long_options, - &option_index); - if (c < 0) - break; - switch(c) { - case 'a': - device = strdup(optarg); - cmd = BTRFS_IOC_ADD_DEV; - break; - case 'b': - cmd = BTRFS_IOC_BALANCE; - break; - case 'r': - device = strdup(optarg); - cmd = BTRFS_IOC_RM_DEV; - break; - default: - print_usage(); - } - } - ac = ac - optind; - if (ac == 0 || !cmd) { - if (!ac) - fprintf(stderr, "No mountpoint specified\n"); - else - fprintf(stderr, "No command specified\n"); - print_usage(); - } - mnt = av[optind]; - - if (device && strcmp(device, "missing") == 0 && - cmd == BTRFS_IOC_RM_DEV) { - fprintf(stderr, "removing missing devices from %s\n", mnt); - } else if (cmd != BTRFS_IOC_BALANCE) { - if (cmd == BTRFS_IOC_ADD_DEV) { - ret = check_mounted(device); - if (ret < 0) { - fprintf(stderr, - "error checking %s mount status\n", - device); - exit(1); - } - if (ret == 1) { - fprintf(stderr, "%s is mounted\n", device); - exit(1); - } - } - devfd = open(device, O_RDWR); - if (devfd < 0) { - fprintf(stderr, "Unable to open device %s\n", device); - exit(1); - } - ret = fstat(devfd, &st); - if (ret) { - fprintf(stderr, "Unable to stat %s\n", device); - exit(1); - } - if (!S_ISBLK(st.st_mode)) { - fprintf(stderr, "%s is not a block device\n", device); - exit(1); - } - } - dirstream = opendir(mnt); - if (!dirstream) { - fprintf(stderr, "Unable to open directory %s\n", mnt); - exit(1); - } - if (cmd == BTRFS_IOC_ADD_DEV) { - int mixed = 0; - - ret = btrfs_prepare_device(devfd, device, 1, &dev_block_count, - 0, &mixed, 0); - if (ret) { - fprintf(stderr, "Unable to init %s\n", device); - exit(1); - } - } - fd = dirfd(dirstream); - if (device) - strncpy_null(args.name, device); - else - args.name[0] = '\0'; - - ret = ioctl(fd, cmd, &args); - printf("ioctl returns %d\n", ret); - return 0; -} - diff --git a/btrfsctl.c b/btrfsctl.c deleted file mode 100644 index 8fd8cc32..00000000 --- a/btrfsctl.c +++ /dev/null @@ -1,273 +0,0 @@ -/* - * 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. - */ - -#ifndef __CHECKER__ -#include <sys/ioctl.h> -#include <sys/mount.h> -#include "ioctl.h" -#endif -#include <stdio.h> -#include <stdlib.h> -#include <sys/types.h> -#include <sys/stat.h> -#include <fcntl.h> -#include <unistd.h> -#include <dirent.h> -#include <libgen.h> -#include <stdlib.h> -#include "kerncompat.h" -#include "ctree.h" -#include "transaction.h" -#include "utils.h" -#include "version.h" - -#ifdef __CHECKER__ -#define BLKGETSIZE64 0 -#define BTRFS_IOC_SNAP_CREATE 0 -#define BTRFS_VOL_NAME_MAX 255 -struct btrfs_ioctl_vol_args { char name[BTRFS_VOL_NAME_MAX]; }; -static inline int ioctl(int fd, int define, void *arg) { return 0; } -#endif - -static void print_usage(void) -{ - printf("usage: btrfsctl [ -d file|dir] [ -s snap_name subvol|tree ]\n"); - printf(" [-r size] [-A device] [-a] [-c] [-D dir .]\n"); - printf("\t-d filename: defragments one file\n"); - printf("\t-d directory: defragments the entire Btree\n"); - printf("\t-s snap_name dir: creates a new snapshot of dir\n"); - printf("\t-S subvol_name dir: creates a new subvolume\n"); - printf("\t-r [+-]size[gkm]: resize the FS by size amount\n"); - printf("\t-A device: scans the device file for a Btrfs filesystem\n"); - printf("\t-a: scans all devices for Btrfs filesystems\n"); - printf("\t-c: forces a single FS sync\n"); - printf("\t-D: delete snapshot\n"); - printf("\t-m [tree id] directory: set the default mounted subvolume" - " to the [tree id] or the directory\n"); - printf("%s\n", BTRFS_BUILD_VERSION); - exit(1); -} - -static int btrfsctl_open_file_or_dir(const char *fname) -{ - int ret; - struct stat st; - DIR *dirstream; - int fd; - - ret = stat(fname, &st); - if (ret < 0) { - perror("stat:"); - exit(1); - } - if (S_ISDIR(st.st_mode)) { - dirstream = opendir(fname); - if (!dirstream) { - perror("opendir"); - exit(1); - } - fd = dirfd(dirstream); - } else { - fd = open(fname, O_RDWR); - } - if (fd < 0) { - perror("open"); - exit(1); - } - return fd; -} - -int main(int ac, char **av) -{ - char *fname = NULL; - char *snap_location = NULL; - int snap_fd = 0; - int fd; - int ret; - struct btrfs_ioctl_vol_args args; - char *name = NULL; - int i; - unsigned long command = 0; - int len; - char *pos; - char *fullpath; - u64 objectid = 0; - - printf( "**\n" - "** WARNING: this program is considered deprecated\n" - "** Please consider to switch to the btrfs utility\n" - "**\n"); - - if (ac == 2 && strcmp(av[1], "-a") == 0) { - fprintf(stderr, "Scanning for Btrfs filesystems\n"); - btrfs_scan_one_dir("/dev", 1); - exit(0); - } - for (i = 1; i < ac; i++) { - if (strcmp(av[i], "-s") == 0) { - if (i + 1 >= ac - 1) { - fprintf(stderr, "-s requires an arg"); - print_usage(); - } - fullpath = av[i + 1]; - - snap_location = strdup(fullpath); - snap_location = dirname(snap_location); - - snap_fd = btrfsctl_open_file_or_dir(snap_location); - - name = strdup(fullpath); - name = basename(name); - len = strlen(name); - - if (len == 0 || len >= BTRFS_VOL_NAME_MAX) { - fprintf(stderr, - "snapshot name zero length or too long\n"); - exit(1); - } - if (strchr(name, '/')) { - fprintf(stderr, - "error: / not allowed in names\n"); - exit(1); - } - command = BTRFS_IOC_SNAP_CREATE; - } else if (strcmp(av[i], "-S") == 0) { - if (i + 1 >= ac - 1) { - fprintf(stderr, "-S requires an arg"); - print_usage(); - } - name = av[i + 1]; - len = strlen(name); - if (len == 0 || len >= BTRFS_VOL_NAME_MAX) { - fprintf(stderr, - "snapshot name zero length or too long\n"); - exit(1); - } - if (strchr(name, '/')) { - fprintf(stderr, - "error: / not allowed in names\n"); - exit(1); - } - command = BTRFS_IOC_SUBVOL_CREATE; - } else if (strcmp(av[i], "-d") == 0) { - if (i >= ac - 1) { - fprintf(stderr, "-d requires an arg\n"); - print_usage(); - } - command = BTRFS_IOC_DEFRAG; - } else if (strcmp(av[i], "-D") == 0) { - if (i >= ac - 1) { - fprintf(stderr, "-D requires an arg\n"); - print_usage(); - } - command = BTRFS_IOC_SNAP_DESTROY; - name = av[i + 1]; - len = strlen(name); - pos = strchr(name, '/'); - if (pos) { - if (*(pos + 1) == '\0') - *(pos) = '\0'; - else { - fprintf(stderr, - "error: / not allowed in names\n"); - exit(1); - } - } - if (len == 0 || len >= BTRFS_VOL_NAME_MAX) { - fprintf(stderr, "-D size too long\n"); - exit(1); - } - } else if (strcmp(av[i], "-A") == 0) { - if (i >= ac - 1) { - fprintf(stderr, "-A requires an arg\n"); - print_usage(); - } - command = BTRFS_IOC_SCAN_DEV; - } else if (strcmp(av[i], "-r") == 0) { - if (i >= ac - 1) { - fprintf(stderr, "-r requires an arg\n"); - print_usage(); - } - name = av[i + 1]; - len = strlen(name); - if (len == 0 || len >= BTRFS_VOL_NAME_MAX) { - fprintf(stderr, "-r size too long\n"); - exit(1); - } - command = BTRFS_IOC_RESIZE; - } else if (strcmp(av[i], "-c") == 0) { - command = BTRFS_IOC_SYNC; - } else if (strcmp(av[i], "-m") == 0) { - command = BTRFS_IOC_DEFAULT_SUBVOL; - if (i == ac - 3) { - objectid = (unsigned long long) - strtoll(av[i + 1], NULL, 0); - if (errno == ERANGE) { - fprintf(stderr, "invalid tree id\n"); - exit(1); - } - } - } - } - if (command == 0) { - fprintf(stderr, "no valid commands given\n"); - print_usage(); - exit(1); - } - fname = av[ac - 1]; - - if (command == BTRFS_IOC_SCAN_DEV) { - fd = open("/dev/btrfs-control", O_RDWR); - if (fd < 0) { - perror("failed to open /dev/btrfs-control"); - exit(1); - } - name = fname; - } else { - fd = btrfsctl_open_file_or_dir(fname); - } - - if (name) - strncpy_null(args.name, name); - else - args.name[0] = '\0'; - - if (command == BTRFS_IOC_SNAP_CREATE) { - args.fd = fd; - ret = ioctl(snap_fd, command, &args); - } else if (command == BTRFS_IOC_DEFAULT_SUBVOL) { - printf("objectid is %llu\n", (unsigned long long)objectid); - ret = ioctl(fd, command, &objectid); - } else - ret = ioctl(fd, command, &args); - if (ret < 0) { - perror("ioctl:"); - exit(1); - } - if (ret == 0) { - printf("operation complete\n"); - } else { - printf("ioctl failed with error %d\n", ret); - } - printf("%s\n", BTRFS_BUILD_VERSION); - if (ret) - exit(1); - - return 0; -} - diff --git a/man/Makefile b/man/Makefile index fefbda97..1ba23b5c 100644 --- a/man/Makefile +++ b/man/Makefile @@ -11,8 +11,7 @@ man8dir = $(mandir)/man8 # list only those we use .SUFFIXES: .in .gz -MANPAGES = mkfs.btrfs.8.gz btrfsctl.8.gz btrfsck.8.gz btrfs-image.8.gz \ - btrfs-show.8.gz btrfs.8.gz +MANPAGES = mkfs.btrfs.8.gz btrfsck.8.gz btrfs-image.8.gz btrfs.8.gz INFILES = ${MANPAGES:.in=.gz} all: $(MANPAGES) diff --git a/man/btrfs-image.8.in b/man/btrfs-image.8.in index 7a348f85..f095cbd7 100644 --- a/man/btrfs-image.8.in +++ b/man/btrfs-image.8.in @@ -31,4 +31,4 @@ and not suitable for any uses other than benchmarking and review. Please refer to the btrfs wiki http://btrfs.wiki.kernel.org for further details. .SH SEE ALSO -.BR btrfsck (8), btrfsctl (8), mkfs.btrfs (8) +.BR btrfsck (8), mkfs.btrfs (8) diff --git a/man/btrfs-show.8.in b/man/btrfs-show.8.in deleted file mode 100644 index cb98b683..00000000 --- a/man/btrfs-show.8.in +++ /dev/null @@ -1,22 +0,0 @@ -.TH BTRFS-SHOW 8 -.SH NAME -btrfs-show \- scan the /dev directory for btrfs partitions and print results. -.SH SYNOPSIS -.B btrfs-show -.SH NOTE -.B btrfs-show -is deprecated. Please consider to switch to the btrfs utility. -.SH DESCRIPTION -.B btrfs-show -is used to scan the /dev directory for btrfs partitions and display brief -information such as lable, uuid, etc of each btrfs partition. -.SH OPTIONS -none -.SH AVAILABILITY -.B btrfs-show -is part of btrfs-progs. Btrfs is currently under heavy development, -and not suitable for any uses other than benchmarking and review. -Please refer to the btrfs wiki -http://btrfs.wiki.kernel.org for further details. -.SH SEE ALSO -.BR btrfsck (8), btrfsctl (8), mkfs.btrfs (8), btrfs-image (8) diff --git a/man/btrfsck.8.in b/man/btrfsck.8.in index 4bf1cff1..5004ba02 100644 --- a/man/btrfsck.8.in +++ b/man/btrfsck.8.in @@ -14,4 +14,3 @@ Please refer to the btrfs wiki http://btrfs.wiki.kernel.org for further details. .SH SEE ALSO .BR mkfs.btrfs (8) -.BR btrfsctl (8) diff --git a/man/btrfsctl.8.in b/man/btrfsctl.8.in deleted file mode 100644 index 8705fa60..00000000 --- a/man/btrfsctl.8.in +++ /dev/null @@ -1,48 +0,0 @@ -.TH BTRFSCTL 8 -.SH NAME -btrfsctl \- control a btrfs filesystem -.SH SYNOPSIS -.B btrfsctl -[ \fB\-d\fP\fI file|directory \fP ] -[ \fB\-s\fP\fI snapshot-name directory\fP ] -[ \fB \-S\fP\fI subvolume-name directory\fP ] -[ \fB \-r\fP\fI [+-]size\fP ] -[ \fB \-A\fP\fI device\fP ] -[ \fB \-a\fP ] -[ \fB \-c\fP ] -.SH NOTE -B btrfsctl -is deprecated. Please consider to switch to the btrfs utility. -.SH DESCRIPTION -.B btrfsctl -is used to control the filesystem and the files and directories stored. It is the tool to create a new snapshot for the filesystem. -.SH OPTIONS -.TP -\fB\-d\fR \fIfile|directory\fR -Defragment a file or a directory. If the argument is a directory, the entire b-tree under the directory is defragged. -.TP -\fB\-s\fR \fIsnapshot-name directory\fR -Creates a new \fIsnapshot\fP of the \fIdirectory\fP specified. -.TP -\fB\-S\fR \fIsubvolume-name directory\fR -Creates a new subvolume. -.TP -\fB\-r\fR \fI[+|-]size\fR -Resizes the filesystem with the \fIsize\fP specified. If the value is preceded with a signed symbol, the filesystem is resized with respect to the current filesystem size. \fIsize\fP can be suffixed by k,m or g to represent kilobytes, megabytes, or gigabytes respectively. -.TP -\fB\-A\fR \fIdevice\fR -Scans the \fIdevice\fR for btrfs filesystem. -.TP -\fB\-a\fR -Scans all devices present in the system for btrfs filesystem. -.TP -\fB\-c\fR -Forces a filesystem sync. -.SH AVAILABILITY -.B btrfsctl -is part of btrfs-progs. Btrfs is currently under heavy development, -and not suitable for any uses other than benchmarking and review. -Please refer to the btrfs wiki http://btrfs.wiki.kernel.org for -further details. -.SH SEE ALSO -.BR mkfs.btrfs (8) |