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rbd.cc
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// -*- mode:C++; tab-width:8; c-basic-offset:2; indent-tabs-mode:t -*-
// vim: ts=8 sw=2 smarttab
/*
* Ceph - scalable distributed file system
*
* Copyright (C) 2004-2006 Sage Weil <[email protected]>
*
* This is free software; you can redistribute it and/or
* modify it under the terms of the GNU General Public
* License version 2, as published by the Free Software
* Foundation. See file COPYING.
*
*/
#include "mon/MonClient.h"
#include "mon/MonMap.h"
#include "common/config.h"
#include "common/errno.h"
#include "common/ceph_argparse.h"
#include "global/global_init.h"
#include "common/safe_io.h"
#include "common/secret.h"
#include "include/rados/librados.hpp"
#include "include/rbd/librbd.hpp"
#include "include/byteorder.h"
#include "include/intarith.h"
#include <dirent.h>
#include <errno.h>
#include <inttypes.h>
#include <iostream>
#include <memory>
#include <sstream>
#include <stdlib.h>
#include <sys/types.h>
#include <time.h>
#include <tr1/memory>
#include <sys/ioctl.h>
#include "include/rbd_types.h"
#include <linux/fs.h>
#include "include/fiemap.h"
#define MAX_SECRET_LEN 1000
#define MAX_POOL_NAME_SIZE 128
static string dir_oid = RBD_DIRECTORY;
static string dir_info_oid = RBD_INFO;
void usage()
{
cout << "usage: rbd [-n <auth user>] [OPTIONS] <cmd> ...\n"
<< "where 'pool' is a rados pool name (default is 'rbd') and 'cmd' is one of:\n"
<< " <ls | list> [pool-name] list rbd images\n"
<< " info [image-name] show information about image size,\n"
<< " striping, etc.\n"
<< " create [image-name] create an empty image (requires size\n"
<< " param)\n"
<< " resize [image-name] resize (expand or contract) image\n"
<< " (requires size param)\n"
<< " rm [image-name] delete an image\n"
<< " export [image-name] [dest-path] export image to file\n"
<< " import [path] [dst-image] import image from file (dest defaults\n"
<< " as the filename part of file)\n"
<< " <cp | copy> [src-image] [dest-image] copy image to dest\n"
<< " <mv | rename> [src-image] [dest-image] copy image to dest\n"
<< " snap ls [image-name] dump list of image snapshots\n"
<< " snap create <--snap=name> [image-name] create a snapshot\n"
<< " snap rollback <--snap=name> [image-name] rollback image head to snapshot\n"
<< " snap rm <--snap=name> [image-name] deletes a snapshot\n"
<< " watch [image-name] watch events on image\n"
<< " map [image-name] map the image to a block device\n"
<< " using the kernel\n"
<< " unmap [device] unmap a rbd device that was\n"
<< " mapped by the kernel\n"
<< "\n"
<< "Other input options:\n"
<< " -p, --pool <pool> source pool name\n"
<< " --image <image-name> image name\n"
<< " --dest <name> destination [pool and] image name\n"
<< " --snap <snapname> specify snapshot name\n"
<< " --dest-pool <name> destination pool name\n"
<< " --path <path-name> path name for import/export (if not specified)\n"
<< " --size <size in MB> size parameter for create and resize commands\n"
<< "\n"
<< "For the map command:\n"
<< " --user <username> rados user to authenticate as\n"
<< " --secret <path> file containing secret key for use with authx\n";
}
void usage_exit()
{
assert(1);
usage();
exit(1);
}
static void print_info(const char *imgname, librbd::image_info_t& info)
{
cout << "rbd image '" << imgname << "':\n"
<< "\tsize " << prettybyte_t(info.size) << " in "
<< info.num_objs << " objects"
<< std::endl
<< "\torder " << info.order
<< " (" << prettybyte_t(info.obj_size) << " objects)"
<< std::endl
<< "\tblock_name_prefix: " << info.block_name_prefix
<< std::endl
<< "\tparent: " << info.parent_name
<< " (pool " << info.parent_pool << ")"
<< std::endl;
}
static int do_list(librbd::RBD &rbd, librados::IoCtx& io_ctx)
{
std::vector<string> names;
int r = rbd.list(io_ctx, names);
if (r < 0)
return r;
for (std::vector<string>::const_iterator i = names.begin(); i != names.end(); i++)
cout << *i << std::endl;
return 0;
}
static int do_create(librbd::RBD &rbd, librados::IoCtx& io_ctx,
const char *imgname, uint64_t size, int *order)
{
int r = rbd.create(io_ctx, imgname, size, order);
if (r < 0)
return r;
return 0;
}
static int do_rename(librbd::RBD &rbd, librados::IoCtx& io_ctx,
const char *imgname, const char *destname)
{
int r = rbd.rename(io_ctx, imgname, destname);
if (r < 0)
return r;
return 0;
}
static int do_show_info(const char *imgname, librbd::Image& image)
{
librbd::image_info_t info;
int r = image.stat(info, sizeof(info));
if (r < 0)
return r;
print_info(imgname, info);
return 0;
}
static int do_delete(librbd::RBD &rbd, librados::IoCtx& io_ctx, const char *imgname)
{
int r = rbd.remove(io_ctx, imgname);
if (r < 0)
return r;
return 0;
}
static int do_resize(librbd::Image& image, uint64_t size)
{
int r = image.resize(size);
if (r < 0)
return r;
return 0;
}
static int do_list_snaps(librbd::Image& image)
{
std::vector<librbd::snap_info_t> snaps;
int r = image.snap_list(snaps);
if (r < 0)
return r;
for (std::vector<librbd::snap_info_t>::iterator i = snaps.begin(); i != snaps.end(); ++i) {
cout << i->id << '\t' << i->name << '\t' << i->size << std::endl;
}
return 0;
}
static int do_add_snap(librbd::Image& image, const char *snapname)
{
int r = image.snap_create(snapname);
if (r < 0)
return r;
return 0;
}
static int do_remove_snap(librbd::Image& image, const char *snapname)
{
int r = image.snap_remove(snapname);
if (r < 0)
return r;
return 0;
}
static int do_rollback_snap(librbd::Image& image, const char *snapname)
{
int r = image.snap_rollback(snapname);
if (r < 0)
return r;
return 0;
}
static int export_read_cb(uint64_t ofs, size_t len, const char *buf, void *arg)
{
ssize_t ret;
int fd = *(int *)arg;
if (!buf) /* a hole */
return 0;
ret = lseek64(fd, ofs, SEEK_SET);
if (ret < 0)
return -errno;
ret = write(fd, buf, len);
if (ret < 0)
return -errno;
cerr << "writing " << len << " bytes at ofs " << ofs << std::endl;
return 0;
}
static int do_export(librbd::Image& image, const char *path)
{
int64_t r;
librbd::image_info_t info;
bufferlist bl;
int fd = open(path, O_WRONLY | O_CREAT | O_EXCL, 0644);
if (fd < 0)
return -errno;
r = image.stat(info, sizeof(info));
if (r < 0)
return r;
r = image.read_iterate(0, info.size, export_read_cb, (void *)&fd);
if (r < 0)
return r;
r = write(fd, bl.c_str(), bl.length());
if (r < 0)
return r;
r = ftruncate(fd, info.size);
if (r < 0)
return r;
close(fd);
return 0;
}
static const char *imgname_from_path(const char *path)
{
const char *imgname;
imgname = strrchr(path, '/');
if (imgname)
imgname++;
else
imgname = path;
return imgname;
}
static void update_snap_name(char *imgname, char **snap)
{
char *s;
s = strrchr(imgname, '@');
if (!s)
return;
*s = '\0';
if (!snap)
return;
s++;
if (*s)
*snap = s;
}
static void set_pool_image_name(const char *orig_pool, const char *orig_img,
char **new_pool, char **new_img, char **snap)
{
const char *sep;
if (orig_pool)
return;
if (!orig_img) {
*new_pool = strdup("rbd");
return;
}
sep = strchr(orig_img, '/');
if (!sep) {
*new_pool= strdup("rbd");
*new_img = strdup(orig_img);
goto done_img;
}
*new_pool = strdup(orig_img);
sep = strchr(*new_pool, '/');
assert (sep);
*(char *)sep = '\0';
*new_img = strdup(sep + 1);
done_img:
update_snap_name(*new_img, snap);
}
static int do_import(librbd::RBD &rbd, librados::IoCtx& io_ctx,
const char *imgname, int *order, const char *path)
{
int fd = open(path, O_RDONLY);
int r;
uint64_t size;
struct stat stat_buf;
string md_oid;
struct fiemap *fiemap;
if (fd < 0) {
r = -errno;
cerr << "error opening " << path << std::endl;
return r;
}
r = fstat(fd, &stat_buf);
if (r < 0) {
r = -errno;
cerr << "stat error " << path << std::endl;
return r;
}
size = (uint64_t)stat_buf.st_size;
assert(imgname);
md_oid = imgname;
md_oid += RBD_SUFFIX;
r = do_create(rbd, io_ctx, imgname, size, order);
if (r < 0) {
cerr << "image creation failed" << std::endl;
return r;
}
librbd::Image image;
r = rbd.open(io_ctx, image, imgname);
if (r < 0) {
cerr << "failed to open image" << std::endl;
return r;
}
fsync(fd); /* flush it first, otherwise extents information might not have been flushed yet */
fiemap = read_fiemap(fd);
if (fiemap && !fiemap->fm_mapped_extents) {
cerr << "empty fiemap!" << std::endl;
free(fiemap);
fiemap = NULL;
}
if (!fiemap) {
fiemap = (struct fiemap *)malloc(sizeof(struct fiemap) + sizeof(struct fiemap_extent));
if (!fiemap) {
cerr << "Failed to allocate fiemap, not enough memory." << std::endl;
return -ENOMEM;
}
fiemap->fm_start = 0;
fiemap->fm_length = size;
fiemap->fm_flags = 0;
fiemap->fm_extent_count = 1;
fiemap->fm_mapped_extents = 1;
fiemap->fm_extents[0].fe_logical = 0;
fiemap->fm_extents[0].fe_physical = 0;
fiemap->fm_extents[0].fe_length = size;
fiemap->fm_extents[0].fe_flags = 0;
}
uint64_t extent = 0;
while (extent < fiemap->fm_mapped_extents) {
off_t file_pos, end_ofs;
size_t extent_len = 0;
file_pos = fiemap->fm_extents[extent].fe_logical; /* position within the file we're reading */
do { /* try to merge consecutive extents */
#define LARGE_ENOUGH_EXTENT (32 * 1024 * 1024)
if (extent_len &&
extent_len + fiemap->fm_extents[extent].fe_length > LARGE_ENOUGH_EXTENT)
break; /* don't try to merge if we're big enough */
extent_len += fiemap->fm_extents[extent].fe_length; /* length of current extent */
end_ofs = MIN((off_t)size, file_pos + (off_t)extent_len);
extent++;
if (extent == fiemap->fm_mapped_extents)
break;
} while (end_ofs == (off_t)fiemap->fm_extents[extent].fe_logical);
cerr << "rbd import file_pos=" << file_pos << " extent_len=" << extent_len << std::endl;
#define READ_BLOCK_LEN (4 * 1024 * 1024)
uint64_t left = end_ofs - file_pos;
while (left) {
uint64_t cur_seg = (left < READ_BLOCK_LEN ? left : READ_BLOCK_LEN);
while (cur_seg) {
bufferptr p(cur_seg);
cerr << "reading " << cur_seg << " bytes at offset " << file_pos << std::endl;
ssize_t rval = TEMP_FAILURE_RETRY(::pread(fd, p.c_str(), cur_seg, file_pos));
if (rval < 0) {
r = -errno;
cerr << "error reading file: " << cpp_strerror(r) << std::endl;
goto done;
}
size_t len = rval;
if (!len) {
r = 0;
goto done;
}
bufferlist bl;
bl.append(p);
librbd::RBD::AioCompletion *completion = new librbd::RBD::AioCompletion(NULL, NULL);
if (!completion) {
r = -ENOMEM;
goto done;
}
r = image.aio_write(file_pos, len, bl, completion);
if (r < 0)
goto done;
completion->wait_for_complete();
r = completion->get_return_value();
completion->release();
if (r < 0) {
cerr << "error writing to image block" << std::endl;
goto done;
}
file_pos += len;
cur_seg -= len;
left -= len;
}
}
}
r = 0;
done:
free(fiemap);
return r;
}
static int do_copy(librbd::Image &src, librados::IoCtx& dest_pp,
const char *destname)
{
int r = src.copy(dest_pp, destname);
if (r < 0)
return r;
return 0;
}
class RbdWatchCtx : public librados::WatchCtx {
string name;
public:
RbdWatchCtx(const char *imgname) : name(imgname) {}
virtual ~RbdWatchCtx() {}
virtual void notify(uint8_t opcode, uint64_t ver, bufferlist& bl) {
cout << name << " got notification opcode=" << (int)opcode << " ver=" << ver << " bl.length=" << bl.length() << std::endl;
}
};
static int do_watch(librados::IoCtx& pp, const char *imgname)
{
string md_oid, dest_md_oid;
uint64_t cookie;
RbdWatchCtx ctx(imgname);
md_oid = imgname;
md_oid += RBD_SUFFIX;
int r = pp.watch(md_oid, 0, &cookie, &ctx);
if (r < 0) {
cerr << "watch failed" << std::endl;
return r;
}
cout << "press enter to exit..." << std::endl;
getchar();
return 0;
}
static int do_kernel_add(const char *poolname, const char *imgname, const char *secretfile, const char *user)
{
MonMap monmap(ceph_clock_now(g_ceph_context));
int r = MonClient::build_initial_monmap(g_ceph_context, monmap);
if (r < 0)
return r;
map<string, entity_addr_t>::const_iterator it = monmap.mon_addr.begin();
ostringstream oss;
for (size_t i = 0; i < monmap.mon_addr.size(); ++i) {
oss << it->second.addr;
if (i + 1 < monmap.mon_addr.size())
oss << ",";
}
oss << " name=" << user;
if (secretfile) {
char secret[MAX_SECRET_LEN];
r = read_secret_from_file(secretfile, secret, sizeof(secret));
if (r < 0)
return r;
char option[MAX_SECRET_LEN + 7];
char key_name[strlen(user) + strlen("client.")];
snprintf(key_name, sizeof(key_name), "client.%s", user);
r = get_secret_option(secret, key_name, option, sizeof(option));
if (r < 0)
return r;
oss << "," << option;
}
oss << " " << poolname << " " << imgname;
// write to /sys/bus/rbd/add
int fd = open("/sys/bus/rbd/add", O_WRONLY);
if (fd < 0) {
r = -errno;
if (r == -ENOENT) {
cerr << "/sys/bus/rbd/add does not exist!" << std::endl
<< "Did you run 'modprobe rbd' or is your rbd module too old?" << std::endl;
}
return r;
}
string add = oss.str();
r = safe_write(fd, add.c_str(), add.size());
close(fd);
return r;
}
static int read_file(const char *filename, char *buf, size_t bufsize)
{
int fd = open(filename, O_RDONLY);
if (fd < 0)
return -errno;
int r = safe_read(fd, buf, bufsize);
if (r < 0) {
cerr << "Warning: could not read " << filename << ": " << cpp_strerror(-r) << std::endl;
return r;
}
char *end = buf;
while (end < buf + bufsize && *end && *end != '\n') {
end++;
}
*end = '\0';
close(fd);
return r;
}
void do_closedir(DIR *dp)
{
if (dp)
closedir(dp);
}
static int do_kernel_showmapped()
{
int r;
const char *devices_path = "/sys/bus/rbd/devices";
std::tr1::shared_ptr<DIR> device_dir(opendir(devices_path), do_closedir);
if (!device_dir.get()) {
r = -errno;
cerr << "Could not open " << devices_path << ": " << cpp_strerror(-r) << std::endl;
return r;
}
struct dirent *dent;
dent = readdir(device_dir.get());
if (!dent) {
r = -errno;
cerr << "Error reading " << devices_path << ": " << cpp_strerror(-r) << std::endl;
return r;
}
cout << "id\tpool\timage\tsnap\tdevice" << std::endl;
do {
if (strcmp(dent->d_name, ".") == 0 || strcmp(dent->d_name, "..") == 0)
continue;
char fn[PATH_MAX];
char dev[PATH_MAX];
snprintf(dev, sizeof(dev), "/dev/rbd%s", dent->d_name);
char name[RBD_MAX_IMAGE_NAME_SIZE];
snprintf(fn, sizeof(fn), "%s/%s/name", devices_path, dent->d_name);
r = read_file(fn, name, sizeof(name));
if (r < 0) {
cerr << "could not read name from " << fn << ": " << cpp_strerror(-r) << std::endl;
continue;
}
char pool[4096];
snprintf(fn, sizeof(fn), "%s/%s/pool", devices_path, dent->d_name);
r = read_file(fn, pool, sizeof(pool));
if (r < 0) {
cerr << "could not read name from " << fn << ": " << cpp_strerror(-r) << std::endl;
continue;
}
char snap[4096];
snprintf(fn, sizeof(fn), "%s/%s/current_snap", devices_path, dent->d_name);
r = read_file(fn, snap, sizeof(snap));
if (r < 0) {
cerr << "could not read name from " << fn << ": " << cpp_strerror(-r) << std::endl;
continue;
}
cout << dent->d_name << "\t" << pool << "\t" << name << "\t" << snap << "\t" << dev << std::endl;
} while ((dent = readdir(device_dir.get())));
return 0;
}
static int get_rbd_seq(int major_num, string &seq)
{
int r;
const char *devices_path = "/sys/bus/rbd/devices";
DIR *device_dir = opendir(devices_path);
if (!device_dir) {
r = -errno;
cerr << "Could not open " << devices_path << ": " << cpp_strerror(-r) << std::endl;
return r;
}
struct dirent *dent;
dent = readdir(device_dir);
if (!dent) {
r = -errno;
cerr << "Error reading " << devices_path << ": " << cpp_strerror(-r) << std::endl;
return r;
}
char major[32];
do {
if (strcmp(dent->d_name, ".") == 0 || strcmp(dent->d_name, "..") == 0)
continue;
char fn[strlen(devices_path) + strlen(dent->d_name) + strlen("//major") + 1];
snprintf(fn, sizeof(fn), "%s/%s/major", devices_path, dent->d_name);
r = read_file(fn, major, sizeof(major));
if (r < 0) {
cerr << "could not read major number from " << fn << ": " << cpp_strerror(-r) << std::endl;
continue;
}
int cur_major = atoi(major);
if (cur_major == major_num) {
seq = string(dent->d_name);
return 0;
}
} while ((dent = readdir(device_dir)));
return -ENOENT;
}
static int do_kernel_rm(const char *dev)
{
struct stat dev_stat;
int r = stat(dev, &dev_stat);
if (!S_ISBLK(dev_stat.st_mode)) {
cerr << dev << " is not a block device" << std::endl;
return -EINVAL;
}
int major = major(dev_stat.st_rdev);
string seq_num;
r = get_rbd_seq(major, seq_num);
if (r == -ENOENT) {
cerr << dev << " is not an rbd device" << std::endl;
return -EINVAL;
}
if (r < 0)
return r;
int fd = open("/sys/bus/rbd/remove", O_WRONLY);
if (fd < 0) {
return -errno;
}
r = safe_write(fd, seq_num.c_str(), seq_num.size());
if (r < 0) {
cerr << "Failed to remove rbd device" << ": " << cpp_strerror(-r) << std::endl;
close(fd);
return r;
}
r = close(fd);
if (r < 0)
r = -errno;
return r;
}
enum {
OPT_NO_CMD = 0,
OPT_LIST,
OPT_INFO,
OPT_CREATE,
OPT_RESIZE,
OPT_RM,
OPT_EXPORT,
OPT_IMPORT,
OPT_COPY,
OPT_RENAME,
OPT_SNAP_CREATE,
OPT_SNAP_ROLLBACK,
OPT_SNAP_REMOVE,
OPT_SNAP_LIST,
OPT_WATCH,
OPT_MAP,
OPT_UNMAP,
OPT_SHOWMAPPED,
};
static int get_cmd(const char *cmd, bool snapcmd)
{
if (!snapcmd) {
if (strcmp(cmd, "ls") == 0 ||
strcmp(cmd, "list") == 0)
return OPT_LIST;
if (strcmp(cmd, "info") == 0)
return OPT_INFO;
if (strcmp(cmd, "create") == 0)
return OPT_CREATE;
if (strcmp(cmd, "resize") == 0)
return OPT_RESIZE;
if (strcmp(cmd, "rm") == 0)
return OPT_RM;
if (strcmp(cmd, "export") == 0)
return OPT_EXPORT;
if (strcmp(cmd, "import") == 0)
return OPT_IMPORT;
if (strcmp(cmd, "copy") == 0 ||
strcmp(cmd, "cp") == 0)
return OPT_COPY;
if (strcmp(cmd, "rename") == 0 ||
strcmp(cmd, "mv") == 0)
return OPT_RENAME;
if (strcmp(cmd, "watch") == 0)
return OPT_WATCH;
if (strcmp(cmd, "map") == 0)
return OPT_MAP;
if (strcmp(cmd, "showmapped") == 0)
return OPT_SHOWMAPPED;
if (strcmp(cmd, "unmap") == 0)
return OPT_UNMAP;
} else {
if (strcmp(cmd, "create") == 0||
strcmp(cmd, "add") == 0)
return OPT_SNAP_CREATE;
if (strcmp(cmd, "rollback") == 0||
strcmp(cmd, "revert") == 0)
return OPT_SNAP_ROLLBACK;
if (strcmp(cmd, "remove") == 0||
strcmp(cmd, "rm") == 0)
return OPT_SNAP_REMOVE;
if (strcmp(cmd, "ls") == 0||
strcmp(cmd, "list") == 0)
return OPT_SNAP_LIST;
}
return OPT_NO_CMD;
}
static void set_conf_param(const char *param, const char **var1, const char **var2)
{
if (!*var1)
*var1 = param;
else if (var2 && !*var2)
*var2 = param;
else
usage_exit();
}
int main(int argc, const char **argv)
{
librados::Rados rados;
librbd::RBD rbd;
librados::IoCtx io_ctx, dest_io_ctx;
librbd::Image image;
vector<const char*> args;
argv_to_vec(argc, argv, args);
env_to_vec(args);
int opt_cmd = OPT_NO_CMD;
global_init(args, CEPH_ENTITY_TYPE_CLIENT, CODE_ENVIRONMENT_UTILITY, 0);
common_init_finish(g_ceph_context);
const char *poolname = NULL;
uint64_t size = 0;
int order = 0;
const char *imgname = NULL, *snapname = NULL, *destname = NULL, *dest_poolname = NULL, *path = NULL, *secretfile = NULL, *user = NULL, *devpath = NULL;
std::string val;
std::ostringstream err;
long long sizell = 0;
std::vector<const char*>::iterator i;
for (i = args.begin(); i != args.end(); ) {
if (ceph_argparse_double_dash(args, i)) {
break;
} else if (ceph_argparse_flag(args, i, "-h", "--help", (char*)NULL)) {
usage();
exit(0);
} else if (ceph_argparse_witharg(args, i, &val, "-p", "--pool", (char*)NULL)) {
poolname = strdup(val.c_str());
} else if (ceph_argparse_witharg(args, i, &val, "--dest-pool", (char*)NULL)) {
dest_poolname = strdup(val.c_str());
} else if (ceph_argparse_witharg(args, i, &val, "--snap", (char*)NULL)) {
snapname = strdup(val.c_str());
} else if (ceph_argparse_witharg(args, i, &val, "-i", "--image", (char*)NULL)) {
imgname = strdup(val.c_str());
} else if (ceph_argparse_withlonglong(args, i, &sizell, &err, "-s", "--size", (char*)NULL)) {
if (!err.str().empty()) {
cerr << err.str() << std::endl;
exit(EXIT_FAILURE);
}
size = sizell;
} else if (ceph_argparse_withint(args, i, &order, &err, "--order", (char*)NULL)) {
if (!err.str().empty()) {
cerr << err.str() << std::endl;
exit(EXIT_FAILURE);
}
} else if (ceph_argparse_witharg(args, i, &val, "--path", (char*)NULL)) {
path = strdup(val.c_str());
} else if (ceph_argparse_witharg(args, i, &val, "--dest", (char*)NULL)) {
destname = strdup(val.c_str());
} else if (ceph_argparse_witharg(args, i, &val, "--secret", (char*)NULL)) {
secretfile = strdup(val.c_str());
} else if (ceph_argparse_witharg(args, i, &val, "--user", (char*)NULL)) {
user = strdup(val.c_str());
} else {
++i;
}
}
i = args.begin();
if (i == args.end()) {
cerr << "you must specify a command." << std::endl;
usage_exit();
}
else if (strcmp(*i, "snap") == 0) {
i = args.erase(i);
if (i == args.end()) {
cerr << "which snap command do you want?" << std::endl;
usage_exit();
}
opt_cmd = get_cmd(*i, true);
}
else {
opt_cmd = get_cmd(*i, false);
}
if (opt_cmd == OPT_NO_CMD) {
cerr << "error parsing command '" << *i << "'" << std::endl;
usage_exit();
}
for (i = args.erase(i); i != args.end(); ++i) {
const char *v = *i;
switch (opt_cmd) {
case OPT_LIST:
set_conf_param(v, &poolname, NULL);
break;
case OPT_INFO:
case OPT_CREATE:
case OPT_RESIZE:
case OPT_RM:
case OPT_SNAP_CREATE:
case OPT_SNAP_ROLLBACK:
case OPT_SNAP_REMOVE:
case OPT_SNAP_LIST:
case OPT_WATCH:
case OPT_MAP:
set_conf_param(v, &imgname, NULL);
break;
case OPT_UNMAP:
set_conf_param(v, &devpath, NULL);
break;
case OPT_EXPORT:
set_conf_param(v, &imgname, &path);
break;
case OPT_IMPORT:
set_conf_param(v, &path, &destname);
break;
case OPT_COPY:
case OPT_RENAME:
set_conf_param(v, &imgname, &destname);
break;
default:
assert(0);
break;
}
}
if (!user)
user = "admin";
if (opt_cmd == OPT_EXPORT && !imgname) {
cerr << "error: image name was not specified" << std::endl;
usage_exit();
}
if (opt_cmd == OPT_IMPORT && !path) {
cerr << "error: path was not specified" << std::endl;
usage_exit();
}
if (opt_cmd == OPT_IMPORT && !destname)
destname = imgname_from_path(path);
if (opt_cmd != OPT_LIST && opt_cmd != OPT_IMPORT && opt_cmd != OPT_UNMAP && opt_cmd != OPT_SHOWMAPPED &&
!imgname) {
cerr << "error: image name was not specified" << std::endl;
usage_exit();
}
set_pool_image_name(poolname, imgname, (char **)&poolname, (char **)&imgname, (char **)&snapname);
set_pool_image_name(dest_poolname, destname, (char **)&dest_poolname, (char **)&destname, NULL);
if ((opt_cmd == OPT_SNAP_CREATE || opt_cmd == OPT_SNAP_ROLLBACK ||
opt_cmd == OPT_SNAP_REMOVE) && !snapname) {
cerr << "error: snap name was not specified" << std::endl;
usage_exit();
}
if (!dest_poolname)
dest_poolname = poolname;
if (opt_cmd == OPT_EXPORT && !path)
path = imgname;
if (opt_cmd == OPT_COPY && !destname ) {
cerr << "error: destination image name was not specified" << std::endl;
usage_exit();
}
bool talk_to_cluster = (opt_cmd != OPT_MAP && opt_cmd != OPT_UNMAP);
if (talk_to_cluster && rados.init_with_context(g_ceph_context) < 0) {
cerr << "error: couldn't initialize rados!" << std::endl;
exit(1);
}
if (talk_to_cluster && rados.connect() < 0) {
cerr << "error: couldn't connect to the cluster!" << std::endl;
exit(1);
}
int r;
if (talk_to_cluster) {
r = rados.ioctx_create(poolname, io_ctx);
if (r < 0) {
cerr << "error opening pool " << poolname << " (err=" << r << ")" << std::endl;
exit(1);
}
}
if (imgname &&
(opt_cmd == OPT_RESIZE || opt_cmd == OPT_INFO || opt_cmd == OPT_SNAP_LIST ||
opt_cmd == OPT_SNAP_CREATE || opt_cmd == OPT_SNAP_ROLLBACK ||
opt_cmd == OPT_SNAP_REMOVE || opt_cmd == OPT_EXPORT || opt_cmd == OPT_WATCH ||
opt_cmd == OPT_COPY)) {
r = rbd.open(io_ctx, image, imgname);
if (r < 0) {
cerr << "error opening image " << imgname << ": " << strerror(r) << std::endl;