mirror of
https://github.com/kdave/btrfs-progs
synced 2024-12-23 22:53:35 +00:00
a7131ad124
I hit a segfault when deleting a subvolume with very long name(>4096), it's because cmd_subvol_delete() calls strdup() and passes NULL as argument, which is returned by realpath(3). I used the following script to reproduce #!/bin/bash mnt=$1 i=1 path=$mnt/subvol_$i # Create very deep subvolumes while btrfs sub create $path;do ((i++)) path="$path/subvol_$i" done last_vol=$(dirname $path) dir=$(dirname $last_vol) vol=$(basename $last_vol) # Try to delete tha last one, this would get segfault pushd $dir btrfs sub delete $vol popd Fix it by checking return value of realpath(3), also fix the one in find_mount_root(). Signed-off-by: Eryu Guan <guaneryu@gmail.com> Signed-off-by: David Sterba <dsterba@suse.cz> Signed-off-by: Chris Mason <chris.mason@fusionio.com>
982 lines
23 KiB
C
982 lines
23 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 <sys/ioctl.h>
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#include <errno.h>
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#include <sys/stat.h>
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#include <libgen.h>
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#include <limits.h>
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#include <getopt.h>
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#include <uuid/uuid.h>
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#include "kerncompat.h"
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#include "ioctl.h"
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#include "qgroup.h"
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#include "ctree.h"
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#include "commands.h"
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#include "utils.h"
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#include "btrfs-list.h"
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#include "utils.h"
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static const char * const subvolume_cmd_group_usage[] = {
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"btrfs subvolume <command> <args>",
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NULL
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};
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/*
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* test if path is a directory
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* this function return
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* 0-> path exists but it is not a directory
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* 1-> path exists and it is a directory
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* -1 -> path is unaccessible
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*/
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static int test_isdir(char *path)
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{
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struct stat st;
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int res;
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res = stat(path, &st);
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if(res < 0 )
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return -1;
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return S_ISDIR(st.st_mode);
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}
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static const char * const cmd_subvol_create_usage[] = {
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"btrfs subvolume create [-i <qgroupid>] [<dest>/]<name>",
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"Create a subvolume",
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"Create a subvolume <name> in <dest>. If <dest> is not given",
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"subvolume <name> will be created in the current directory.",
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"",
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"-i <qgroupid> add the newly created subvolume to a qgroup. This",
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" option can be given multiple times.",
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NULL
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};
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static int cmd_subvol_create(int argc, char **argv)
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{
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int retval, res, len;
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int fddst = -1;
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char *dupname = NULL;
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char *dupdir = NULL;
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char *newname;
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char *dstdir;
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char *dst;
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struct btrfs_qgroup_inherit *inherit = NULL;
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DIR *dirstream = NULL;
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optind = 1;
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while (1) {
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int c = getopt(argc, argv, "c:i:");
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if (c < 0)
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break;
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switch (c) {
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case 'c':
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res = qgroup_inherit_add_copy(&inherit, optarg, 0);
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if (res) {
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retval = res;
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goto out;
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}
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break;
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case 'i':
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res = qgroup_inherit_add_group(&inherit, optarg);
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if (res) {
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retval = res;
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goto out;
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}
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break;
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default:
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usage(cmd_subvol_create_usage);
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}
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}
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if (check_argc_exact(argc - optind, 1))
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usage(cmd_subvol_create_usage);
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dst = argv[optind];
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retval = 1; /* failure */
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res = test_isdir(dst);
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if (res >= 0) {
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fprintf(stderr, "ERROR: '%s' exists\n", dst);
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goto out;
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}
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dupname = strdup(dst);
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newname = basename(dupname);
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dupdir = strdup(dst);
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dstdir = dirname(dupdir);
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if (!strcmp(newname, ".") || !strcmp(newname, "..") ||
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strchr(newname, '/') ){
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fprintf(stderr, "ERROR: uncorrect subvolume name ('%s')\n",
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newname);
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goto out;
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}
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len = strlen(newname);
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if (len == 0 || len >= BTRFS_VOL_NAME_MAX) {
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fprintf(stderr, "ERROR: subvolume name too long ('%s)\n",
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newname);
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goto out;
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}
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fddst = open_file_or_dir(dstdir, &dirstream);
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if (fddst < 0) {
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fprintf(stderr, "ERROR: can't access to '%s'\n", dstdir);
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goto out;
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}
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printf("Create subvolume '%s/%s'\n", dstdir, newname);
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if (inherit) {
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struct btrfs_ioctl_vol_args_v2 args;
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memset(&args, 0, sizeof(args));
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strncpy_null(args.name, newname);
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args.flags |= BTRFS_SUBVOL_QGROUP_INHERIT;
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args.size = qgroup_inherit_size(inherit);
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args.qgroup_inherit = inherit;
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res = ioctl(fddst, BTRFS_IOC_SUBVOL_CREATE_V2, &args);
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} else {
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struct btrfs_ioctl_vol_args args;
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memset(&args, 0, sizeof(args));
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strncpy_null(args.name, newname);
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res = ioctl(fddst, BTRFS_IOC_SUBVOL_CREATE, &args);
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}
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if (res < 0) {
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fprintf(stderr, "ERROR: cannot create subvolume - %s\n",
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strerror(errno));
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goto out;
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}
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retval = 0; /* success */
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out:
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close_file_or_dir(fddst, dirstream);
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free(inherit);
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free(dupname);
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free(dupdir);
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return retval;
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}
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/*
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* test if path is a subvolume:
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* this function return
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* 0-> path exists but it is not a subvolume
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* 1-> path exists and it is a subvolume
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* -1 -> path is unaccessible
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*/
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int test_issubvolume(char *path)
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{
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struct stat st;
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int res;
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res = stat(path, &st);
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if(res < 0 )
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return -1;
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return (st.st_ino == 256) && S_ISDIR(st.st_mode);
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}
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static const char * const cmd_subvol_delete_usage[] = {
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"btrfs subvolume delete <subvolume> [<subvolume>...]",
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"Delete subvolume(s)",
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NULL
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};
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static int cmd_subvol_delete(int argc, char **argv)
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{
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int res, fd, len, e, cnt = 1, ret = 0;
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struct btrfs_ioctl_vol_args args;
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char *dname, *vname, *cpath;
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char *dupdname = NULL;
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char *dupvname = NULL;
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char *path;
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DIR *dirstream = NULL;
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if (argc < 2)
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usage(cmd_subvol_delete_usage);
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again:
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path = argv[cnt];
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res = test_issubvolume(path);
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if (res < 0) {
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fprintf(stderr, "ERROR: error accessing '%s'\n", path);
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ret = 1;
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goto out;
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}
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if (!res) {
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fprintf(stderr, "ERROR: '%s' is not a subvolume\n", path);
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ret = 1;
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goto out;
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}
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cpath = realpath(path, NULL);
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if (!cpath) {
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ret = errno;
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fprintf(stderr, "ERROR: finding real path for '%s': %s\n",
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path, strerror(errno));
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goto out;
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}
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dupdname = strdup(cpath);
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dname = dirname(dupdname);
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dupvname = strdup(cpath);
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vname = basename(dupvname);
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free(cpath);
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if (!strcmp(vname, ".") || !strcmp(vname, "..") ||
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strchr(vname, '/')) {
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fprintf(stderr, "ERROR: incorrect subvolume name ('%s')\n",
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vname);
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ret = 1;
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goto out;
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}
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len = strlen(vname);
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if (len == 0 || len >= BTRFS_VOL_NAME_MAX) {
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fprintf(stderr, "ERROR: snapshot name too long ('%s)\n",
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vname);
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ret = 1;
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goto out;
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}
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fd = open_file_or_dir(dname, &dirstream);
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if (fd < 0) {
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fprintf(stderr, "ERROR: can't access to '%s'\n", dname);
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ret = 1;
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goto out;
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}
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printf("Delete subvolume '%s/%s'\n", dname, vname);
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strncpy_null(args.name, vname);
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res = ioctl(fd, BTRFS_IOC_SNAP_DESTROY, &args);
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e = errno;
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close_file_or_dir(fd, dirstream);
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if(res < 0 ){
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fprintf( stderr, "ERROR: cannot delete '%s/%s' - %s\n",
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dname, vname, strerror(e));
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ret = 1;
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goto out;
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}
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out:
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free(dupdname);
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free(dupvname);
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cnt++;
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if (cnt < argc)
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goto again;
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return ret;
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}
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/*
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* Naming of options:
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* - uppercase for filters and sort options
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* - lowercase for enabling specific items in the output
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*/
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static const char * const cmd_subvol_list_usage[] = {
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"btrfs subvolume list [options] [-G [+|-]value] [-C [+|-]value] "
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"[--sort=gen,ogen,rootid,path] <path>",
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"List subvolumes (and snapshots)",
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"",
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"-p print parent ID",
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"-a print all the subvolumes in the filesystem and",
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" distinguish absolute and relative path with respect",
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" to the given <path>",
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"-c print the ogeneration of the subvolume",
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"-g print the generation of the subvolume",
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"-o print only subvolumes bellow specified path",
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"-u print the uuid of subvolumes (and snapshots)",
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"-q print the parent uuid of the snapshots",
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"-t print the result as a table",
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"-s list snapshots only in the filesystem",
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"-r list readonly subvolumes (including snapshots)",
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"-G [+|-]value",
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" filter the subvolumes by generation",
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" (+value: >= value; -value: <= value; value: = value)",
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"-C [+|-]value",
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" filter the subvolumes by ogeneration",
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" (+value: >= value; -value: <= value; value: = value)",
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"--sort=gen,ogen,rootid,path",
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" list the subvolume in order of gen, ogen, rootid or path",
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" you also can add '+' or '-' in front of each items.",
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" (+:ascending, -:descending, ascending default)",
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NULL,
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};
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static int cmd_subvol_list(int argc, char **argv)
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{
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struct btrfs_list_filter_set *filter_set;
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struct btrfs_list_comparer_set *comparer_set;
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u64 flags = 0;
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int fd = -1;
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u64 top_id;
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int ret = -1, uerr = 0;
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int c;
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char *subvol;
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int is_tab_result = 0;
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int is_list_all = 0;
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int is_only_in_path = 0;
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struct option long_options[] = {
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{"sort", 1, NULL, 'S'},
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{NULL, 0, NULL, 0}
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};
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DIR *dirstream = NULL;
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filter_set = btrfs_list_alloc_filter_set();
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comparer_set = btrfs_list_alloc_comparer_set();
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optind = 1;
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while(1) {
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c = getopt_long(argc, argv,
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"acgopqsurG:C:t", long_options, NULL);
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if (c < 0)
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break;
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switch(c) {
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case 'p':
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btrfs_list_setup_print_column(BTRFS_LIST_PARENT);
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break;
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case 'a':
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is_list_all = 1;
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break;
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case 'c':
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btrfs_list_setup_print_column(BTRFS_LIST_OGENERATION);
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break;
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case 'g':
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btrfs_list_setup_print_column(BTRFS_LIST_GENERATION);
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break;
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case 'o':
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is_only_in_path = 1;
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break;
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case 't':
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is_tab_result = 1;
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break;
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case 's':
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btrfs_list_setup_filter(&filter_set,
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BTRFS_LIST_FILTER_SNAPSHOT_ONLY,
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0);
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btrfs_list_setup_print_column(BTRFS_LIST_OGENERATION);
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btrfs_list_setup_print_column(BTRFS_LIST_OTIME);
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break;
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case 'u':
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btrfs_list_setup_print_column(BTRFS_LIST_UUID);
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break;
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case 'q':
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btrfs_list_setup_print_column(BTRFS_LIST_PUUID);
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break;
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case 'r':
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flags |= BTRFS_ROOT_SUBVOL_RDONLY;
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break;
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case 'G':
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btrfs_list_setup_print_column(BTRFS_LIST_GENERATION);
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ret = btrfs_list_parse_filter_string(optarg,
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&filter_set,
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BTRFS_LIST_FILTER_GEN);
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if (ret) {
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uerr = 1;
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goto out;
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}
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break;
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|
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case 'C':
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btrfs_list_setup_print_column(BTRFS_LIST_OGENERATION);
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ret = btrfs_list_parse_filter_string(optarg,
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&filter_set,
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BTRFS_LIST_FILTER_CGEN);
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if (ret) {
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uerr = 1;
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goto out;
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}
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break;
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case 'S':
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ret = btrfs_list_parse_sort_string(optarg,
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&comparer_set);
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if (ret) {
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uerr = 1;
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goto out;
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}
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break;
|
|
|
|
default:
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uerr = 1;
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goto out;
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}
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}
|
|
|
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if (flags)
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btrfs_list_setup_filter(&filter_set, BTRFS_LIST_FILTER_FLAGS,
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flags);
|
|
|
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if (check_argc_exact(argc - optind, 1)) {
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uerr = 1;
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goto out;
|
|
}
|
|
|
|
subvol = argv[optind];
|
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fd = open_file_or_dir(subvol, &dirstream);
|
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if (fd < 0) {
|
|
ret = -1;
|
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fprintf(stderr, "ERROR: can't access '%s'\n", subvol);
|
|
goto out;
|
|
}
|
|
|
|
ret = btrfs_list_get_path_rootid(fd, &top_id);
|
|
if (ret) {
|
|
fprintf(stderr, "ERROR: can't get rootid for '%s'\n", subvol);
|
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goto out;
|
|
}
|
|
|
|
if (is_list_all)
|
|
btrfs_list_setup_filter(&filter_set,
|
|
BTRFS_LIST_FILTER_FULL_PATH,
|
|
top_id);
|
|
else if (is_only_in_path)
|
|
btrfs_list_setup_filter(&filter_set,
|
|
BTRFS_LIST_FILTER_TOPID_EQUAL,
|
|
top_id);
|
|
|
|
/* by default we shall print the following columns*/
|
|
btrfs_list_setup_print_column(BTRFS_LIST_OBJECTID);
|
|
btrfs_list_setup_print_column(BTRFS_LIST_GENERATION);
|
|
btrfs_list_setup_print_column(BTRFS_LIST_TOP_LEVEL);
|
|
btrfs_list_setup_print_column(BTRFS_LIST_PATH);
|
|
|
|
if (is_tab_result)
|
|
ret = btrfs_list_subvols_print(fd, filter_set, comparer_set,
|
|
BTRFS_LIST_LAYOUT_TABLE,
|
|
!is_list_all && !is_only_in_path, NULL);
|
|
else
|
|
ret = btrfs_list_subvols_print(fd, filter_set, comparer_set,
|
|
BTRFS_LIST_LAYOUT_DEFAULT,
|
|
!is_list_all && !is_only_in_path, NULL);
|
|
|
|
out:
|
|
close_file_or_dir(fd, dirstream);
|
|
if (filter_set)
|
|
btrfs_list_free_filter_set(filter_set);
|
|
if (comparer_set)
|
|
btrfs_list_free_comparer_set(comparer_set);
|
|
if (uerr)
|
|
usage(cmd_subvol_list_usage);
|
|
return !!ret;
|
|
}
|
|
|
|
static const char * const cmd_snapshot_usage[] = {
|
|
"btrfs subvolume snapshot [-r] <source> <dest>|[<dest>/]<name>",
|
|
"btrfs subvolume snapshot [-r] [-i <qgroupid>] <source> <dest>|[<dest>/]<name>",
|
|
"Create a snapshot of the subvolume",
|
|
"Create a writable/readonly snapshot of the subvolume <source> with",
|
|
"the name <name> in the <dest> directory. If only <dest> is given,",
|
|
"the subvolume will be named the basename of <source>.",
|
|
"",
|
|
"-r create a readonly snapshot",
|
|
"-i <qgroupid> add the newly created snapshot to a qgroup. This",
|
|
" option can be given multiple times.",
|
|
NULL
|
|
};
|
|
|
|
static int cmd_snapshot(int argc, char **argv)
|
|
{
|
|
char *subvol, *dst;
|
|
int res, retval;
|
|
int fd = -1, fddst = -1;
|
|
int len, readonly = 0;
|
|
char *dupname = NULL;
|
|
char *dupdir = NULL;
|
|
char *newname;
|
|
char *dstdir;
|
|
struct btrfs_ioctl_vol_args_v2 args;
|
|
struct btrfs_qgroup_inherit *inherit = NULL;
|
|
DIR *dirstream1 = NULL, *dirstream2 = NULL;
|
|
|
|
optind = 1;
|
|
memset(&args, 0, sizeof(args));
|
|
while (1) {
|
|
int c = getopt(argc, argv, "c:i:r");
|
|
if (c < 0)
|
|
break;
|
|
|
|
switch (c) {
|
|
case 'c':
|
|
res = qgroup_inherit_add_copy(&inherit, optarg, 0);
|
|
if (res) {
|
|
retval = res;
|
|
goto out;
|
|
}
|
|
break;
|
|
case 'i':
|
|
res = qgroup_inherit_add_group(&inherit, optarg);
|
|
if (res) {
|
|
retval = res;
|
|
goto out;
|
|
}
|
|
break;
|
|
case 'r':
|
|
readonly = 1;
|
|
break;
|
|
case 'x':
|
|
res = qgroup_inherit_add_copy(&inherit, optarg, 1);
|
|
if (res) {
|
|
retval = res;
|
|
goto out;
|
|
}
|
|
break;
|
|
default:
|
|
usage(cmd_snapshot_usage);
|
|
}
|
|
}
|
|
|
|
if (check_argc_exact(argc - optind, 2))
|
|
usage(cmd_snapshot_usage);
|
|
|
|
subvol = argv[optind];
|
|
dst = argv[optind + 1];
|
|
|
|
retval = 1; /* failure */
|
|
res = test_issubvolume(subvol);
|
|
if (res < 0) {
|
|
fprintf(stderr, "ERROR: error accessing '%s'\n", subvol);
|
|
goto out;
|
|
}
|
|
if (!res) {
|
|
fprintf(stderr, "ERROR: '%s' is not a subvolume\n", subvol);
|
|
goto out;
|
|
}
|
|
|
|
res = test_isdir(dst);
|
|
if (res == 0) {
|
|
fprintf(stderr, "ERROR: '%s' exists and it is not a directory\n", dst);
|
|
goto out;
|
|
}
|
|
|
|
if (res > 0) {
|
|
dupname = strdup(subvol);
|
|
newname = basename(dupname);
|
|
dstdir = dst;
|
|
} else {
|
|
dupname = strdup(dst);
|
|
newname = basename(dupname);
|
|
dupdir = strdup(dst);
|
|
dstdir = dirname(dupdir);
|
|
}
|
|
|
|
if (!strcmp(newname, ".") || !strcmp(newname, "..") ||
|
|
strchr(newname, '/') ){
|
|
fprintf(stderr, "ERROR: incorrect snapshot name ('%s')\n",
|
|
newname);
|
|
goto out;
|
|
}
|
|
|
|
len = strlen(newname);
|
|
if (len == 0 || len >= BTRFS_VOL_NAME_MAX) {
|
|
fprintf(stderr, "ERROR: snapshot name too long ('%s)\n",
|
|
newname);
|
|
goto out;
|
|
}
|
|
|
|
fddst = open_file_or_dir(dstdir, &dirstream1);
|
|
if (fddst < 0) {
|
|
fprintf(stderr, "ERROR: can't access to '%s'\n", dstdir);
|
|
goto out;
|
|
}
|
|
|
|
fd = open_file_or_dir(subvol, &dirstream2);
|
|
if (fd < 0) {
|
|
fprintf(stderr, "ERROR: can't access to '%s'\n", dstdir);
|
|
goto out;
|
|
}
|
|
|
|
if (readonly) {
|
|
args.flags |= BTRFS_SUBVOL_RDONLY;
|
|
printf("Create a readonly snapshot of '%s' in '%s/%s'\n",
|
|
subvol, dstdir, newname);
|
|
} else {
|
|
printf("Create a snapshot of '%s' in '%s/%s'\n",
|
|
subvol, dstdir, newname);
|
|
}
|
|
|
|
args.fd = fd;
|
|
if (inherit) {
|
|
args.flags |= BTRFS_SUBVOL_QGROUP_INHERIT;
|
|
args.size = qgroup_inherit_size(inherit);
|
|
args.qgroup_inherit = inherit;
|
|
}
|
|
strncpy_null(args.name, newname);
|
|
|
|
res = ioctl(fddst, BTRFS_IOC_SNAP_CREATE_V2, &args);
|
|
|
|
if (res < 0) {
|
|
fprintf( stderr, "ERROR: cannot snapshot '%s' - %s\n",
|
|
subvol, strerror(errno));
|
|
goto out;
|
|
}
|
|
|
|
retval = 0; /* success */
|
|
|
|
out:
|
|
close_file_or_dir(fddst, dirstream1);
|
|
close_file_or_dir(fd, dirstream2);
|
|
free(inherit);
|
|
free(dupname);
|
|
free(dupdir);
|
|
|
|
return retval;
|
|
}
|
|
|
|
static const char * const cmd_subvol_get_default_usage[] = {
|
|
"btrfs subvolume get-default <path>",
|
|
"Get the default subvolume of a filesystem",
|
|
NULL
|
|
};
|
|
|
|
static int cmd_subvol_get_default(int argc, char **argv)
|
|
{
|
|
int fd = -1;
|
|
int ret;
|
|
char *subvol;
|
|
struct btrfs_list_filter_set *filter_set;
|
|
u64 default_id;
|
|
DIR *dirstream = NULL;
|
|
|
|
if (check_argc_exact(argc, 2))
|
|
usage(cmd_subvol_get_default_usage);
|
|
|
|
subvol = argv[1];
|
|
fd = open_file_or_dir(subvol, &dirstream);
|
|
if (fd < 0) {
|
|
fprintf(stderr, "ERROR: can't access '%s'\n", subvol);
|
|
return 1;
|
|
}
|
|
|
|
ret = btrfs_list_get_default_subvolume(fd, &default_id);
|
|
if (ret) {
|
|
fprintf(stderr, "ERROR: can't perform the search - %s\n",
|
|
strerror(errno));
|
|
goto out;
|
|
}
|
|
|
|
ret = 1;
|
|
if (default_id == 0) {
|
|
fprintf(stderr, "ERROR: 'default' dir item not found\n");
|
|
goto out;
|
|
}
|
|
|
|
/* no need to resolve roots if FS_TREE is default */
|
|
if (default_id == BTRFS_FS_TREE_OBJECTID) {
|
|
printf("ID 5 (FS_TREE)\n");
|
|
goto out;
|
|
}
|
|
|
|
filter_set = btrfs_list_alloc_filter_set();
|
|
btrfs_list_setup_filter(&filter_set, BTRFS_LIST_FILTER_ROOTID,
|
|
default_id);
|
|
|
|
/* by default we shall print the following columns*/
|
|
btrfs_list_setup_print_column(BTRFS_LIST_OBJECTID);
|
|
btrfs_list_setup_print_column(BTRFS_LIST_GENERATION);
|
|
btrfs_list_setup_print_column(BTRFS_LIST_TOP_LEVEL);
|
|
btrfs_list_setup_print_column(BTRFS_LIST_PATH);
|
|
|
|
ret = btrfs_list_subvols_print(fd, filter_set, NULL,
|
|
BTRFS_LIST_LAYOUT_DEFAULT, 1, NULL);
|
|
|
|
if (filter_set)
|
|
btrfs_list_free_filter_set(filter_set);
|
|
out:
|
|
close_file_or_dir(fd, dirstream);
|
|
return !!ret;
|
|
}
|
|
|
|
static const char * const cmd_subvol_set_default_usage[] = {
|
|
"btrfs subvolume set-default <subvolid> <path>",
|
|
"Set the default subvolume of a filesystem",
|
|
NULL
|
|
};
|
|
|
|
static int cmd_subvol_set_default(int argc, char **argv)
|
|
{
|
|
int ret=0, fd, e;
|
|
u64 objectid;
|
|
char *path;
|
|
char *subvolid;
|
|
DIR *dirstream = NULL;
|
|
|
|
if (check_argc_exact(argc, 3))
|
|
usage(cmd_subvol_set_default_usage);
|
|
|
|
subvolid = argv[1];
|
|
path = argv[2];
|
|
|
|
objectid = (unsigned long long)strtoll(subvolid, NULL, 0);
|
|
if (errno == ERANGE) {
|
|
fprintf(stderr, "ERROR: invalid tree id (%s)\n", subvolid);
|
|
return 1;
|
|
}
|
|
|
|
fd = open_file_or_dir(path, &dirstream);
|
|
if (fd < 0) {
|
|
fprintf(stderr, "ERROR: can't access to '%s'\n", path);
|
|
return 1;
|
|
}
|
|
|
|
ret = ioctl(fd, BTRFS_IOC_DEFAULT_SUBVOL, &objectid);
|
|
e = errno;
|
|
close_file_or_dir(fd, dirstream);
|
|
if (ret < 0) {
|
|
fprintf(stderr, "ERROR: unable to set a new default subvolume - %s\n",
|
|
strerror(e));
|
|
return 1;
|
|
}
|
|
return 0;
|
|
}
|
|
|
|
static const char * const cmd_find_new_usage[] = {
|
|
"btrfs subvolume find-new <path> <lastgen>",
|
|
"List the recently modified files in a filesystem",
|
|
NULL
|
|
};
|
|
|
|
static int cmd_find_new(int argc, char **argv)
|
|
{
|
|
int fd;
|
|
int ret;
|
|
char *subvol;
|
|
u64 last_gen;
|
|
DIR *dirstream = NULL;
|
|
|
|
if (check_argc_exact(argc, 3))
|
|
usage(cmd_find_new_usage);
|
|
|
|
subvol = argv[1];
|
|
last_gen = atoll(argv[2]);
|
|
|
|
ret = test_issubvolume(subvol);
|
|
if (ret < 0) {
|
|
fprintf(stderr, "ERROR: error accessing '%s'\n", subvol);
|
|
return 1;
|
|
}
|
|
if (!ret) {
|
|
fprintf(stderr, "ERROR: '%s' is not a subvolume\n", subvol);
|
|
return 1;
|
|
}
|
|
|
|
fd = open_file_or_dir(subvol, &dirstream);
|
|
if (fd < 0) {
|
|
fprintf(stderr, "ERROR: can't access '%s'\n", subvol);
|
|
return 1;
|
|
}
|
|
|
|
ret = ioctl(fd, BTRFS_IOC_SYNC);
|
|
if (ret < 0) {
|
|
fprintf(stderr, "ERROR: unable to fs-syncing '%s' - %s\n",
|
|
subvol, strerror(errno));
|
|
close_file_or_dir(fd, dirstream);
|
|
return 1;
|
|
}
|
|
|
|
ret = btrfs_list_find_updated_files(fd, 0, last_gen);
|
|
close_file_or_dir(fd, dirstream);
|
|
return !!ret;
|
|
}
|
|
|
|
static const char * const cmd_subvol_show_usage[] = {
|
|
"btrfs subvolume show <subvol-path>",
|
|
"Show more information of the subvolume",
|
|
NULL
|
|
};
|
|
|
|
static int cmd_subvol_show(int argc, char **argv)
|
|
{
|
|
struct root_info get_ri;
|
|
struct btrfs_list_filter_set *filter_set;
|
|
char tstr[256];
|
|
char uuidparse[37];
|
|
char *fullpath = NULL, *svpath = NULL, *mnt = NULL;
|
|
char raw_prefix[] = "\t\t\t\t";
|
|
u64 sv_id, mntid;
|
|
int fd = -1, mntfd = -1;
|
|
int ret = 1;
|
|
DIR *dirstream1 = NULL, *dirstream2 = NULL;
|
|
|
|
if (check_argc_exact(argc, 2))
|
|
usage(cmd_subvol_show_usage);
|
|
|
|
fullpath = realpath(argv[1], NULL);
|
|
if (!fullpath) {
|
|
fprintf(stderr, "ERROR: finding real path for '%s', %s\n",
|
|
argv[1], strerror(errno));
|
|
goto out;
|
|
}
|
|
|
|
ret = test_issubvolume(fullpath);
|
|
if (ret < 0) {
|
|
fprintf(stderr, "ERROR: error accessing '%s'\n", fullpath);
|
|
goto out;
|
|
}
|
|
if (!ret) {
|
|
fprintf(stderr, "ERROR: '%s' is not a subvolume\n", fullpath);
|
|
goto out;
|
|
}
|
|
|
|
ret = find_mount_root(fullpath, &mnt);
|
|
if (ret < 0) {
|
|
fprintf(stderr, "ERROR: find_mount_root failed on %s: "
|
|
"%s\n", fullpath, strerror(-ret));
|
|
goto out;
|
|
}
|
|
ret = 1;
|
|
svpath = get_subvol_name(mnt, fullpath);
|
|
|
|
fd = open_file_or_dir(fullpath, &dirstream1);
|
|
if (fd < 0) {
|
|
fprintf(stderr, "ERROR: can't access '%s'\n", fullpath);
|
|
goto out;
|
|
}
|
|
|
|
ret = btrfs_list_get_path_rootid(fd, &sv_id);
|
|
if (ret) {
|
|
fprintf(stderr, "ERROR: can't get rootid for '%s'\n",
|
|
fullpath);
|
|
goto out;
|
|
}
|
|
|
|
mntfd = open_file_or_dir(mnt, &dirstream2);
|
|
if (mntfd < 0) {
|
|
fprintf(stderr, "ERROR: can't access '%s'\n", mnt);
|
|
goto out;
|
|
}
|
|
|
|
ret = btrfs_list_get_path_rootid(mntfd, &mntid);
|
|
if (ret) {
|
|
fprintf(stderr, "ERROR: can't get rootid for '%s'\n", mnt);
|
|
goto out;
|
|
}
|
|
|
|
if (sv_id == BTRFS_FS_TREE_OBJECTID) {
|
|
printf("%s is btrfs root\n", fullpath);
|
|
goto out;
|
|
}
|
|
|
|
memset(&get_ri, 0, sizeof(get_ri));
|
|
get_ri.root_id = sv_id;
|
|
|
|
if (btrfs_get_subvol(mntfd, &get_ri)) {
|
|
fprintf(stderr, "ERROR: can't find '%s'\n",
|
|
svpath);
|
|
goto out;
|
|
}
|
|
|
|
ret = 0;
|
|
/* print the info */
|
|
printf("%s\n", fullpath);
|
|
printf("\tName: \t\t\t%s\n", get_ri.name);
|
|
|
|
if (uuid_is_null(get_ri.uuid))
|
|
strcpy(uuidparse, "-");
|
|
else
|
|
uuid_unparse(get_ri.uuid, uuidparse);
|
|
printf("\tuuid: \t\t\t%s\n", uuidparse);
|
|
|
|
if (uuid_is_null(get_ri.puuid))
|
|
strcpy(uuidparse, "-");
|
|
else
|
|
uuid_unparse(get_ri.puuid, uuidparse);
|
|
printf("\tParent uuid: \t\t%s\n", uuidparse);
|
|
|
|
if (get_ri.otime) {
|
|
struct tm tm;
|
|
|
|
localtime_r(&get_ri.otime, &tm);
|
|
strftime(tstr, 256, "%Y-%m-%d %X", &tm);
|
|
} else
|
|
strcpy(tstr, "-");
|
|
printf("\tCreation time: \t\t%s\n", tstr);
|
|
|
|
printf("\tObject ID: \t\t%llu\n", get_ri.root_id);
|
|
printf("\tGeneration (Gen): \t%llu\n", get_ri.gen);
|
|
printf("\tGen at creation: \t%llu\n", get_ri.ogen);
|
|
printf("\tParent: \t\t%llu\n", get_ri.ref_tree);
|
|
printf("\tTop Level: \t\t%llu\n", get_ri.top_id);
|
|
|
|
if (get_ri.flags & BTRFS_ROOT_SUBVOL_RDONLY)
|
|
printf("\tFlags: \t\t\treadonly\n");
|
|
else
|
|
printf("\tFlags: \t\t\t-\n");
|
|
|
|
/* print the snapshots of the given subvol if any*/
|
|
printf("\tSnapshot(s):\n");
|
|
filter_set = btrfs_list_alloc_filter_set();
|
|
btrfs_list_setup_filter(&filter_set, BTRFS_LIST_FILTER_BY_PARENT,
|
|
(u64)(unsigned long)get_ri.uuid);
|
|
btrfs_list_setup_print_column(BTRFS_LIST_PATH);
|
|
btrfs_list_subvols_print(fd, filter_set, NULL, BTRFS_LIST_LAYOUT_RAW,
|
|
1, raw_prefix);
|
|
|
|
/* clean up */
|
|
if (get_ri.path)
|
|
free(get_ri.path);
|
|
if (get_ri.name)
|
|
free(get_ri.name);
|
|
if (get_ri.full_path)
|
|
free(get_ri.full_path);
|
|
if (filter_set)
|
|
btrfs_list_free_filter_set(filter_set);
|
|
|
|
out:
|
|
close_file_or_dir(fd, dirstream1);
|
|
close_file_or_dir(mntfd, dirstream2);
|
|
if (mnt)
|
|
free(mnt);
|
|
if (fullpath)
|
|
free(fullpath);
|
|
return !!ret;
|
|
}
|
|
|
|
const struct cmd_group subvolume_cmd_group = {
|
|
subvolume_cmd_group_usage, NULL, {
|
|
{ "create", cmd_subvol_create, cmd_subvol_create_usage, NULL, 0 },
|
|
{ "delete", cmd_subvol_delete, cmd_subvol_delete_usage, NULL, 0 },
|
|
{ "list", cmd_subvol_list, cmd_subvol_list_usage, NULL, 0 },
|
|
{ "snapshot", cmd_snapshot, cmd_snapshot_usage, NULL, 0 },
|
|
{ "get-default", cmd_subvol_get_default,
|
|
cmd_subvol_get_default_usage, NULL, 0 },
|
|
{ "set-default", cmd_subvol_set_default,
|
|
cmd_subvol_set_default_usage, NULL, 0 },
|
|
{ "find-new", cmd_find_new, cmd_find_new_usage, NULL, 0 },
|
|
{ "show", cmd_subvol_show, cmd_subvol_show_usage, NULL, 0 },
|
|
NULL_CMD_STRUCT
|
|
}
|
|
};
|
|
|
|
int cmd_subvolume(int argc, char **argv)
|
|
{
|
|
return handle_command_group(&subvolume_cmd_group, argc, argv);
|
|
}
|