--- /dev/null
+// -*- mode:C++; tab-width:8; c-basic-offset:2; indent-tabs-mode:t -*-
+// vim: ts=8 sw=2 smarttab
+
+#include "tools/rbd/ArgumentTypes.h"
+#include "tools/rbd/Shell.h"
+#include "tools/rbd/Utils.h"
+#include "include/Context.h"
+#include "common/blkdev.h"
+#include "common/debug.h"
+#include "common/errno.h"
+#include "common/Throttle.h"
+#include "include/compat.h"
+#include "include/encoding.h"
+#include "common/debug.h"
+#include "common/errno.h"
+#include "common/safe_io.h"
+#include <iostream>
+#include <boost/program_options.hpp>
+#include <boost/scoped_ptr.hpp>
+#include "include/assert.h"
+
+#define dout_context g_ceph_context
+#define dout_subsys ceph_subsys_rbd
+
+namespace rbd {
+namespace action {
+namespace import {
+
+struct ImportDiffContext {
+ librbd::Image *image;
+ int fd;
+ size_t size;
+ utils::ProgressContext pc;
+ OrderedThrottle throttle;
+ uint64_t last_offset;
+
+ ImportDiffContext(librbd::Image *image, int fd, size_t size, bool no_progress)
+ : image(image), fd(fd), size(size), pc("Importing image diff", no_progress),
+ throttle((fd == STDIN_FILENO) ? 1 :
+ g_conf->get_val<int64_t>("rbd_concurrent_management_ops"),
+ false),
+ last_offset(0) {
+ }
+
+ void update_size(size_t new_size)
+ {
+ if (fd == STDIN_FILENO) {
+ size = new_size;
+ }
+ }
+
+ void update_progress(uint64_t off)
+ {
+ if (size) {
+ pc.update_progress(off, size);
+ last_offset = off;
+ }
+ }
+
+ void update_progress()
+ {
+ uint64_t off = last_offset;
+ if (fd != STDIN_FILENO) {
+ off = lseek(fd, 0, SEEK_CUR);
+ }
+
+ update_progress(off);
+ }
+
+ void finish(int r)
+ {
+ if (r < 0) {
+ pc.fail();
+ } else {
+ pc.finish();
+ }
+ }
+};
+
+class C_ImportDiff : public Context {
+public:
+ C_ImportDiff(ImportDiffContext *idiffctx, bufferlist data, uint64_t offset,
+ uint64_t length, bool discard)
+ : m_idiffctx(idiffctx), m_data(data), m_offset(offset), m_length(length),
+ m_discard(discard) {
+ // use block offset (stdin) or import file position to report
+ // progress.
+ if (m_idiffctx->fd == STDIN_FILENO) {
+ m_prog_offset = offset;
+ } else {
+ m_prog_offset = lseek(m_idiffctx->fd, 0, SEEK_CUR);
+ }
+ }
+
+ int send()
+ {
+ if (m_idiffctx->throttle.pending_error()) {
+ return m_idiffctx->throttle.wait_for_ret();
+ }
+
+ C_OrderedThrottle *ctx = m_idiffctx->throttle.start_op(this);
+ librbd::RBD::AioCompletion *aio_completion =
+ new librbd::RBD::AioCompletion(ctx, &utils::aio_context_callback);
+
+ int r;
+ if (m_discard) {
+ r = m_idiffctx->image->aio_discard(m_offset, m_length, aio_completion);
+ } else {
+ r = m_idiffctx->image->aio_write2(m_offset, m_length, m_data,
+ aio_completion, LIBRADOS_OP_FLAG_FADVISE_NOCACHE);
+ }
+
+ if (r < 0) {
+ aio_completion->release();
+ ctx->complete(r);
+ }
+
+ return r;
+ }
+
+ void finish(int r) override
+ {
+ m_idiffctx->update_progress(m_prog_offset);
+ m_idiffctx->throttle.end_op(r);
+ }
+
+private:
+ ImportDiffContext *m_idiffctx;
+ bufferlist m_data;
+ uint64_t m_offset;
+ uint64_t m_length;
+ bool m_discard;
+ uint64_t m_prog_offset;
+};
+
+static int do_image_snap_from(ImportDiffContext *idiffctx)
+{
+ int r;
+ string from;
+ r = utils::read_string(idiffctx->fd, 4096, &from); // 4k limit to make sure we don't get a garbage string
+ if (r < 0) {
+ return r;
+ }
+
+ bool exists;
+ r = idiffctx->image->snap_exists2(from.c_str(), &exists);
+ if (r < 0) {
+ return r;
+ }
+
+ if (!exists) {
+ std::cerr << "start snapshot '" << from
+ << "' does not exist in the image, aborting" << std::endl;
+ return -EINVAL;
+ }
+
+ idiffctx->update_progress();
+ return 0;
+}
+
+static int do_image_snap_to(ImportDiffContext *idiffctx, std::string *tosnap)
+{
+ int r;
+ string to;
+ r = utils::read_string(idiffctx->fd, 4096, &to); // 4k limit to make sure we don't get a garbage string
+ if (r < 0) {
+ return r;
+ }
+
+ bool exists;
+ r = idiffctx->image->snap_exists2(to.c_str(), &exists);
+ if (r < 0) {
+ return r;
+ }
+
+ if (exists) {
+ std::cerr << "end snapshot '" << to << "' already exists, aborting" << std::endl;
+ return -EEXIST;
+ }
+
+ *tosnap = to;
+ idiffctx->update_progress();
+
+ return 0;
+}
+
+static int do_image_resize(ImportDiffContext *idiffctx)
+{
+ int r;
+ char buf[sizeof(uint64_t)];
+ uint64_t end_size;
+ r = safe_read_exact(idiffctx->fd, buf, sizeof(buf));
+ if (r < 0) {
+ return r;
+ }
+
+ bufferlist bl;
+ bl.append(buf, sizeof(buf));
+ bufferlist::iterator p = bl.begin();
+ ::decode(end_size, p);
+
+ uint64_t cur_size;
+ idiffctx->image->size(&cur_size);
+ if (cur_size != end_size) {
+ idiffctx->image->resize(end_size);
+ }
+
+ idiffctx->update_size(end_size);
+ idiffctx->update_progress();
+ return 0;
+}
+
+static int do_image_io(ImportDiffContext *idiffctx, bool discard, size_t sparse_size)
+{
+ int r;
+ char buf[16];
+ r = safe_read_exact(idiffctx->fd, buf, sizeof(buf));
+ if (r < 0) {
+ return r;
+ }
+
+ bufferlist bl;
+ bl.append(buf, sizeof(buf));
+ bufferlist::iterator p = bl.begin();
+
+ uint64_t image_offset, buffer_length;
+ ::decode(image_offset, p);
+ ::decode(buffer_length, p);
+
+ if (!discard) {
+ bufferptr bp = buffer::create(buffer_length);
+ r = safe_read_exact(idiffctx->fd, bp.c_str(), buffer_length);
+ if (r < 0) {
+ return r;
+ }
+
+ size_t buffer_offset = 0;
+ while (buffer_offset < buffer_length) {
+ size_t write_length = 0;
+ bool zeroed = false;
+ utils::calc_sparse_extent(bp, sparse_size, buffer_offset, buffer_length,
+ &write_length, &zeroed);
+ assert(write_length > 0);
+
+ bufferlist write_bl;
+ if (!zeroed) {
+ bufferptr write_ptr(bp, buffer_offset, write_length);
+ write_bl.push_back(write_ptr);
+ assert(write_bl.length() == write_length);
+ }
+
+ C_ImportDiff *ctx = new C_ImportDiff(idiffctx, write_bl,
+ image_offset + buffer_offset,
+ write_length, zeroed);
+ r = ctx->send();
+ if (r < 0) {
+ return r;
+ }
+
+ buffer_offset += write_length;
+ }
+ } else {
+ bufferlist data;
+ C_ImportDiff *ctx = new C_ImportDiff(idiffctx, data, image_offset,
+ buffer_length, true);
+ return ctx->send();
+ }
+ return r;
+}
+
+static int validate_banner(int fd, std::string banner)
+{
+ int r;
+ char buf[banner.size() + 1];
+ r = safe_read_exact(fd, buf, banner.size());
+ if (r < 0) {
+ return r;
+ }
+
+ buf[banner.size()] = '\0';
+ if (strcmp(buf, banner.c_str())) {
+ std::cerr << "invalid banner '" << buf << "', expected '" << banner << "'" << std::endl;
+ return -EINVAL;
+ }
+
+ return 0;
+}
+
+static int skip_tag(int fd, uint64_t length)
+{
+ int r;
+
+ if (fd == STDIN_FILENO) {
+ // read the appending data out to skip this tag.
+ char buf[4096];
+ uint64_t len = min<uint64_t>(length, sizeof(buf));
+ while (len > 0) {
+ r = safe_read_exact(fd, buf, len);
+ if (r < 0)
+ return r;
+ length -= len;
+ len = min<uint64_t>(length, sizeof(buf));
+ }
+ } else {
+ // lseek to skip this tag
+ off64_t offs = lseek64(fd, length, SEEK_CUR);
+ if (offs < 0) {
+ return -errno;
+ }
+ }
+
+ return 0;
+}
+
+static int read_tag(int fd, __u8 end_tag, int format, __u8 *tag, uint64_t *readlen)
+{
+ int r;
+ __u8 read_tag;
+
+ r = safe_read_exact(fd, &read_tag, sizeof(read_tag));
+ if (r < 0) {
+ return r;
+ }
+
+ *tag = read_tag;
+ if (read_tag != end_tag && format == 2) {
+ char buf[sizeof(uint64_t)];
+ r = safe_read_exact(fd, buf, sizeof(buf));
+ if (r < 0) {
+ return r;
+ }
+
+ bufferlist bl;
+ bl.append(buf, sizeof(buf));
+ bufferlist::iterator p = bl.begin();
+ ::decode(*readlen, p);
+ }
+
+ return 0;
+}
+
+int do_import_diff_fd(librados::Rados &rados, librbd::Image &image, int fd,
+ bool no_progress, int format, size_t sparse_size)
+{
+ int r;
+
+ uint64_t size = 0;
+ bool from_stdin = (fd == STDIN_FILENO);
+ if (!from_stdin) {
+ struct stat stat_buf;
+ r = ::fstat(fd, &stat_buf);
+ if (r < 0) {
+ return r;
+ }
+ size = (uint64_t)stat_buf.st_size;
+ }
+
+ r = validate_banner(fd, (format == 1 ? utils::RBD_DIFF_BANNER :
+ utils::RBD_DIFF_BANNER_V2));
+ if (r < 0) {
+ return r;
+ }
+
+ std::string skip_partial_discard;
+ r = rados.conf_get("rbd_skip_partial_discard", skip_partial_discard);
+ if (r < 0 || skip_partial_discard != "false") {
+ dout(1) << "disabling sparse import" << dendl;
+ sparse_size = 0;
+ r = 0;
+ }
+
+ // begin image import
+ std::string tosnap;
+ ImportDiffContext idiffctx(&image, fd, size, no_progress);
+ while (r == 0) {
+ __u8 tag;
+ uint64_t length = 0;
+
+ r = read_tag(fd, RBD_DIFF_END, format, &tag, &length);
+ if (r < 0 || tag == RBD_DIFF_END) {
+ break;
+ }
+
+ if (tag == RBD_DIFF_FROM_SNAP) {
+ r = do_image_snap_from(&idiffctx);
+ } else if (tag == RBD_DIFF_TO_SNAP) {
+ r = do_image_snap_to(&idiffctx, &tosnap);
+ } else if (tag == RBD_DIFF_IMAGE_SIZE) {
+ r = do_image_resize(&idiffctx);
+ } else if (tag == RBD_DIFF_WRITE || tag == RBD_DIFF_ZERO) {
+ r = do_image_io(&idiffctx, (tag == RBD_DIFF_ZERO), sparse_size);
+ } else {
+ std::cerr << "unrecognized tag byte " << (int)tag << " in stream; skipping"
+ << std::endl;
+ r = skip_tag(fd, length);
+ }
+ }
+
+ int temp_r = idiffctx.throttle.wait_for_ret();
+ r = (r < 0) ? r : temp_r; // preserve original error
+ if (r == 0 && tosnap.length()) {
+ idiffctx.image->snap_create(tosnap.c_str());
+ }
+
+ idiffctx.finish(r);
+ return r;
+}
+
+int do_import_diff(librados::Rados &rados, librbd::Image &image,
+ const char *path, bool no_progress, size_t sparse_size)
+{
+ int r;
+ int fd;
+
+ if (strcmp(path, "-") == 0) {
+ fd = STDIN_FILENO;
+ } else {
+ fd = open(path, O_RDONLY);
+ if (fd < 0) {
+ r = -errno;
+ std::cerr << "rbd: error opening " << path << std::endl;
+ return r;
+ }
+ }
+ r = do_import_diff_fd(rados, image, fd, no_progress, 1, sparse_size);
+
+ if (fd != 0)
+ close(fd);
+ return r;
+}
+
+namespace at = argument_types;
+namespace po = boost::program_options;
+
+void get_arguments_diff(po::options_description *positional,
+ po::options_description *options) {
+ at::add_path_options(positional, options,
+ "import file (or '-' for stdin)");
+ at::add_image_spec_options(positional, options, at::ARGUMENT_MODIFIER_NONE);
+ at::add_sparse_size_option(options);
+ at::add_no_progress_option(options);
+}
+
+int execute_diff(const po::variables_map &vm) {
+ std::string path;
+ int r = utils::get_path(vm, utils::get_positional_argument(vm, 0), &path);
+ if (r < 0) {
+ return r;
+ }
+
+ size_t arg_index = 1;
+ std::string pool_name;
+ std::string image_name;
+ std::string snap_name;
+ r = utils::get_pool_image_snapshot_names(
+ vm, at::ARGUMENT_MODIFIER_NONE, &arg_index, &pool_name, &image_name,
+ &snap_name, utils::SNAPSHOT_PRESENCE_NONE, utils::SPEC_VALIDATION_NONE);
+ if (r < 0) {
+ return r;
+ }
+
+ size_t sparse_size = utils::RBD_DEFAULT_SPARSE_SIZE;
+ if (vm.count(at::IMAGE_SPARSE_SIZE)) {
+ sparse_size = vm[at::IMAGE_SPARSE_SIZE].as<size_t>();
+ }
+
+ librados::Rados rados;
+ librados::IoCtx io_ctx;
+ librbd::Image image;
+ r = utils::init_and_open_image(pool_name, image_name, "", "", false,
+ &rados, &io_ctx, &image);
+ if (r < 0) {
+ return r;
+ }
+
+ r = do_import_diff(rados, image, path.c_str(),
+ vm[at::NO_PROGRESS].as<bool>(), sparse_size);
+ if (r < 0) {
+ cerr << "rbd: import-diff failed: " << cpp_strerror(r) << std::endl;
+ return r;
+ }
+ return 0;
+}
+
+Shell::Action action_diff(
+ {"import-diff"}, {}, "Import an incremental diff.", "", &get_arguments_diff,
+ &execute_diff);
+
+class C_Import : public Context {
+public:
+ C_Import(SimpleThrottle &simple_throttle, librbd::Image &image,
+ bufferlist &bl, uint64_t offset)
+ : m_throttle(simple_throttle), m_image(image),
+ m_aio_completion(
+ new librbd::RBD::AioCompletion(this, &utils::aio_context_callback)),
+ m_bufferlist(bl), m_offset(offset)
+ {
+ }
+
+ void send()
+ {
+ m_throttle.start_op();
+
+ int op_flags = LIBRADOS_OP_FLAG_FADVISE_SEQUENTIAL |
+ LIBRADOS_OP_FLAG_FADVISE_NOCACHE;
+ int r = m_image.aio_write2(m_offset, m_bufferlist.length(), m_bufferlist,
+ m_aio_completion, op_flags);
+ if (r < 0) {
+ std::cerr << "rbd: error requesting write to destination image"
+ << std::endl;
+ m_aio_completion->release();
+ m_throttle.end_op(r);
+ }
+ }
+
+ void finish(int r) override
+ {
+ if (r < 0) {
+ std::cerr << "rbd: error writing to destination image at offset "
+ << m_offset << ": " << cpp_strerror(r) << std::endl;
+ }
+ m_throttle.end_op(r);
+ }
+
+private:
+ SimpleThrottle &m_throttle;
+ librbd::Image &m_image;
+ librbd::RBD::AioCompletion *m_aio_completion;
+ bufferlist m_bufferlist;
+ uint64_t m_offset;
+};
+
+static int decode_and_set_image_option(int fd, uint64_t imageopt, librbd::ImageOptions& opts)
+{
+ int r;
+ char buf[sizeof(uint64_t)];
+
+ r = safe_read_exact(fd, buf, sizeof(buf));
+ if (r < 0) {
+ return r;
+ }
+
+ bufferlist bl;
+ bl.append(buf, sizeof(buf));
+ bufferlist::iterator it;
+ it = bl.begin();
+
+ uint64_t val;
+ ::decode(val, it);
+
+ if (opts.get(imageopt, &val) != 0) {
+ opts.set(imageopt, val);
+ }
+
+ return 0;
+}
+
+static int do_import_header(int fd, int import_format, uint64_t &size, librbd::ImageOptions& opts)
+{
+ // There is no header in v1 image.
+ if (import_format == 1) {
+ return 0;
+ }
+
+ if (fd == STDIN_FILENO || size < utils::RBD_IMAGE_BANNER_V2.size()) {
+ return -EINVAL;
+ }
+
+ int r;
+ r = validate_banner(fd, utils::RBD_IMAGE_BANNER_V2);
+ if (r < 0) {
+ return r;
+ }
+
+ // As V1 format for image is already deprecated, import image in V2 by default.
+ uint64_t image_format = 2;
+ if (opts.get(RBD_IMAGE_OPTION_FORMAT, &image_format) != 0) {
+ opts.set(RBD_IMAGE_OPTION_FORMAT, image_format);
+ }
+
+ while (r == 0) {
+ __u8 tag;
+ uint64_t length;
+ r = read_tag(fd, RBD_EXPORT_IMAGE_END, image_format, &tag, &length);
+ if (r < 0 || tag == RBD_EXPORT_IMAGE_END) {
+ break;
+ }
+
+ if (tag == RBD_EXPORT_IMAGE_ORDER) {
+ r = decode_and_set_image_option(fd, RBD_IMAGE_OPTION_ORDER, opts);
+ } else if (tag == RBD_EXPORT_IMAGE_FEATURES) {
+ r = decode_and_set_image_option(fd, RBD_IMAGE_OPTION_FEATURES, opts);
+ } else if (tag == RBD_EXPORT_IMAGE_STRIPE_UNIT) {
+ r = decode_and_set_image_option(fd, RBD_IMAGE_OPTION_STRIPE_UNIT, opts);
+ } else if (tag == RBD_EXPORT_IMAGE_STRIPE_COUNT) {
+ r = decode_and_set_image_option(fd, RBD_IMAGE_OPTION_STRIPE_COUNT, opts);
+ } else {
+ std::cerr << "rbd: invalid tag in image properties zone: " << tag << "Skip it."
+ << std::endl;
+ r = skip_tag(fd, length);
+ }
+ }
+
+ return r;
+}
+
+static int do_import_v2(librados::Rados &rados, int fd, librbd::Image &image,
+ uint64_t size, size_t imgblklen,
+ utils::ProgressContext &pc, size_t sparse_size)
+{
+ int r = 0;
+ r = validate_banner(fd, utils::RBD_IMAGE_DIFFS_BANNER_V2);
+ if (r < 0) {
+ return r;
+ }
+
+ char buf[sizeof(uint64_t)];
+ r = safe_read_exact(fd, buf, sizeof(buf));
+ if (r < 0) {
+ return r;
+ }
+ bufferlist bl;
+ bl.append(buf, sizeof(buf));
+ bufferlist::iterator p = bl.begin();
+ uint64_t diff_num;
+ ::decode(diff_num, p);
+
+ for (size_t i = 0; i < diff_num; i++) {
+ r = do_import_diff_fd(rados, image, fd, true, 2, sparse_size);
+ if (r < 0) {
+ pc.fail();
+ std::cerr << "rbd: import-diff failed: " << cpp_strerror(r) << std::endl;
+ return r;
+ }
+ pc.update_progress(i + 1, diff_num);
+ }
+
+ return r;
+}
+
+static int do_import_v1(int fd, librbd::Image &image, uint64_t size,
+ size_t imgblklen, utils::ProgressContext &pc,
+ size_t sparse_size)
+{
+ int r = 0;
+ size_t reqlen = imgblklen; // amount requested from read
+ ssize_t readlen; // amount received from one read
+ size_t blklen = 0; // amount accumulated from reads to fill blk
+ char *p = new char[imgblklen];
+ uint64_t image_pos = 0;
+ bool from_stdin = (fd == STDIN_FILENO);
+ boost::scoped_ptr<SimpleThrottle> throttle;
+
+ if (from_stdin) {
+ throttle.reset(new SimpleThrottle(1, false));
+ } else {
+ throttle.reset(new SimpleThrottle(
+ g_conf->get_val<int64_t>("rbd_concurrent_management_ops"), false));
+ }
+
+ reqlen = min<uint64_t>(reqlen, size);
+ // loop body handles 0 return, as we may have a block to flush
+ while ((readlen = ::read(fd, p + blklen, reqlen)) >= 0) {
+ if (throttle->pending_error()) {
+ break;
+ }
+
+ blklen += readlen;
+ // if read was short, try again to fill the block before writing
+ if (readlen && ((size_t)readlen < reqlen)) {
+ reqlen -= readlen;
+ continue;
+ }
+ if (!from_stdin)
+ pc.update_progress(image_pos, size);
+
+ bufferptr blkptr(p, blklen);
+ // resize output image by binary expansion as we go for stdin
+ if (from_stdin && (image_pos + (size_t)blklen) > size) {
+ size *= 2;
+ r = image.resize(size);
+ if (r < 0) {
+ std::cerr << "rbd: can't resize image during import" << std::endl;
+ goto out;
+ }
+ }
+
+ // write as much as we got; perhaps less than imgblklen
+ // but skip writing zeros to create sparse images
+ size_t buffer_offset = 0;
+ while (buffer_offset < blklen) {
+ size_t write_length = 0;
+ bool zeroed = false;
+ utils::calc_sparse_extent(blkptr, sparse_size, buffer_offset, blklen,
+ &write_length, &zeroed);
+
+ if (!zeroed) {
+ bufferlist write_bl;
+ bufferptr write_ptr(blkptr, buffer_offset, write_length);
+ write_bl.push_back(write_ptr);
+ assert(write_bl.length() == write_length);
+
+ C_Import *ctx = new C_Import(*throttle, image, write_bl,
+ image_pos + buffer_offset);
+ ctx->send();
+ }
+
+ buffer_offset += write_length;
+ }
+
+ // done with whole block, whether written or not
+ image_pos += blklen;
+ if (!from_stdin && image_pos >= size)
+ break;
+ // if read had returned 0, we're at EOF and should quit
+ if (readlen == 0)
+ break;
+ blklen = 0;
+ reqlen = imgblklen;
+ }
+ r = throttle->wait_for_ret();
+ if (r < 0) {
+ goto out;
+ }
+
+ if (fd == STDIN_FILENO) {
+ r = image.resize(image_pos);
+ if (r < 0) {
+ std::cerr << "rbd: final image resize failed" << std::endl;
+ goto out;
+ }
+ }
+out:
+ delete[] p;
+ return r;
+}
+
+static int do_import(librados::Rados &rados, librbd::RBD &rbd,
+ librados::IoCtx& io_ctx, const char *imgname,
+ const char *path, librbd::ImageOptions& opts,
+ bool no_progress, int import_format, size_t sparse_size)
+{
+ int fd, r;
+ struct stat stat_buf;
+ utils::ProgressContext pc("Importing image", no_progress);
+
+ assert(imgname);
+
+ uint64_t order;
+ if (opts.get(RBD_IMAGE_OPTION_ORDER, &order) != 0) {
+ order = g_conf->get_val<int64_t>("rbd_default_order");
+ }
+
+ // try to fill whole imgblklen blocks for sparsification
+ size_t imgblklen = 1 << order;
+ librbd::Image image;
+ uint64_t size = 0;
+
+ bool from_stdin = !strcmp(path, "-");
+ if (from_stdin) {
+ fd = STDIN_FILENO;
+ size = 1ULL << order;
+ } else {
+ if ((fd = open(path, O_RDONLY)) < 0) {
+ r = -errno;
+ std::cerr << "rbd: error opening " << path << std::endl;
+ goto done2;
+ }
+
+ if ((fstat(fd, &stat_buf)) < 0) {
+ r = -errno;
+ std::cerr << "rbd: stat error " << path << std::endl;
+ goto done;
+ }
+ if (S_ISDIR(stat_buf.st_mode)) {
+ r = -EISDIR;
+ std::cerr << "rbd: cannot import a directory" << std::endl;
+ goto done;
+ }
+ if (stat_buf.st_size)
+ size = (uint64_t)stat_buf.st_size;
+
+ if (!size) {
+ int64_t bdev_size = 0;
+ r = get_block_device_size(fd, &bdev_size);
+ if (r < 0) {
+ std::cerr << "rbd: unable to get size of file/block device"
+ << std::endl;
+ goto done;
+ }
+ assert(bdev_size >= 0);
+ size = (uint64_t) bdev_size;
+ }
+#ifdef HAVE_POSIX_FADVISE
+ posix_fadvise(fd, 0, 0, POSIX_FADV_SEQUENTIAL);
+#endif
+ }
+
+ r = do_import_header(fd, import_format, size, opts);
+ if (r < 0) {
+ std::cerr << "rbd: import header failed." << std::endl;
+ goto done;
+ }
+
+ r = rbd.create4(io_ctx, imgname, size, opts);
+ if (r < 0) {
+ std::cerr << "rbd: image creation failed" << std::endl;
+ goto done;
+ }
+
+ r = rbd.open(io_ctx, image, imgname);
+ if (r < 0) {
+ std::cerr << "rbd: failed to open image" << std::endl;
+ goto err;
+ }
+
+ if (import_format == 1) {
+ r = do_import_v1(fd, image, size, imgblklen, pc, sparse_size);
+ } else {
+ r = do_import_v2(rados, fd, image, size, imgblklen, pc, sparse_size);
+ }
+ if (r < 0) {
+ std::cerr << "rbd: failed to import image" << std::endl;
+ image.close();
+ goto err;
+ }
+
+ r = image.close();
+err:
+ if (r < 0)
+ rbd.remove(io_ctx, imgname);
+done:
+ if (r < 0)
+ pc.fail();
+ else
+ pc.finish();
+ if (!from_stdin)
+ close(fd);
+done2:
+ return r;
+}
+
+void get_arguments(po::options_description *positional,
+ po::options_description *options) {
+ at::add_path_options(positional, options,
+ "import file (or '-' for stdin)");
+ at::add_image_spec_options(positional, options, at::ARGUMENT_MODIFIER_DEST);
+ at::add_create_image_options(options, true);
+ at::add_sparse_size_option(options);
+ at::add_no_progress_option(options);
+ at::add_export_format_option(options);
+
+ // TODO legacy rbd allowed import to accept both 'image'/'dest' and
+ // 'pool'/'dest-pool'
+ at::add_pool_option(options, at::ARGUMENT_MODIFIER_NONE, " (deprecated)");
+ at::add_image_option(options, at::ARGUMENT_MODIFIER_NONE, " (deprecated)");
+}
+
+int execute(const po::variables_map &vm) {
+ std::string path;
+ int r = utils::get_path(vm, utils::get_positional_argument(vm, 0), &path);
+ if (r < 0) {
+ return r;
+ }
+
+ // odd check to support legacy / deprecated behavior of import
+ std::string deprecated_pool_name;
+ if (vm.count(at::POOL_NAME)) {
+ deprecated_pool_name = vm[at::POOL_NAME].as<std::string>();
+ std::cerr << "rbd: --pool is deprecated for import, use --dest-pool"
+ << std::endl;
+ }
+
+ std::string deprecated_image_name;
+ if (vm.count(at::IMAGE_NAME)) {
+ deprecated_image_name = vm[at::IMAGE_NAME].as<std::string>();
+ std::cerr << "rbd: --image is deprecated for import, use --dest"
+ << std::endl;
+ } else {
+ deprecated_image_name = path.substr(path.find_last_of("/") + 1);
+ }
+
+ std::string deprecated_snap_name;
+ r = utils::extract_spec(deprecated_image_name, &deprecated_pool_name,
+ &deprecated_image_name, &deprecated_snap_name,
+ utils::SPEC_VALIDATION_FULL);
+ if (r < 0) {
+ return r;
+ }
+
+ size_t sparse_size = utils::RBD_DEFAULT_SPARSE_SIZE;
+ if (vm.count(at::IMAGE_SPARSE_SIZE)) {
+ sparse_size = vm[at::IMAGE_SPARSE_SIZE].as<size_t>();
+ }
+
+ size_t arg_index = 1;
+ std::string pool_name = deprecated_pool_name;
+ std::string image_name;
+ std::string snap_name = deprecated_snap_name;
+ r = utils::get_pool_image_snapshot_names(
+ vm, at::ARGUMENT_MODIFIER_DEST, &arg_index, &pool_name, &image_name,
+ &snap_name, utils::SNAPSHOT_PRESENCE_NONE, utils::SPEC_VALIDATION_FULL,
+ false);
+ if (r < 0) {
+ return r;
+ }
+
+ if (image_name.empty()) {
+ image_name = deprecated_image_name;
+ }
+
+ librbd::ImageOptions opts;
+ r = utils::get_image_options(vm, true, &opts);
+ if (r < 0) {
+ return r;
+ }
+
+ librados::Rados rados;
+ librados::IoCtx io_ctx;
+ r = utils::init(pool_name, &rados, &io_ctx);
+ if (r < 0) {
+ return r;
+ }
+
+ int format = 1;
+ if (vm.count("export-format"))
+ format = vm["export-format"].as<uint64_t>();
+
+ librbd::RBD rbd;
+ r = do_import(rados, rbd, io_ctx, image_name.c_str(), path.c_str(),
+ opts, vm[at::NO_PROGRESS].as<bool>(), format, sparse_size);
+ if (r < 0) {
+ std::cerr << "rbd: import failed: " << cpp_strerror(r) << std::endl;
+ return r;
+ }
+
+ return 0;
+}
+
+Shell::Action action(
+ {"import"}, {}, "Import image from file.", at::get_long_features_help(),
+ &get_arguments, &execute);
+
+} // namespace import
+} // namespace action
+} // namespace rbd
Code Review / stor4nfv.git / blobdiff