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-rw-r--r--src/import/import-raw.c48
-rw-r--r--src/import/import.c52
-rw-r--r--src/import/qcow2-util.c347
-rw-r--r--src/import/qcow2-util.h25
-rw-r--r--src/import/test-qcow2.c55
5 files changed, 519 insertions, 8 deletions
diff --git a/src/import/import-raw.c b/src/import/import-raw.c
index f1b36cbfcc..c15765d51c 100644
--- a/src/import/import-raw.c
+++ b/src/import/import-raw.c
@@ -27,6 +27,7 @@
#include "hashmap.h"
#include "utf8.h"
#include "curl-util.h"
+#include "qcow2-util.h"
#include "import-raw.h"
#include "strv.h"
#include "copy.h"
@@ -235,6 +236,49 @@ finish:
raw_import_finish(f->import, r);
}
+static int raw_import_maybe_convert_qcow2(RawImportFile *f) {
+ _cleanup_close_ int converted_fd = -1;
+ _cleanup_free_ char *t = NULL;
+ int r;
+
+ assert(f);
+ assert(f->disk_fd);
+ assert(f->temp_path);
+
+ r = qcow2_detect(f->disk_fd);
+ if (r < 0)
+ return log_error_errno(r, "Failed to detect whether this is a QCOW2 image: %m");
+ if (r == 0)
+ return 0;
+
+ /* This is a QCOW2 image, let's convert it */
+ r = tempfn_random(f->final_path, &t);
+ if (r < 0)
+ return log_oom();
+
+ converted_fd = open(t, O_RDWR|O_CREAT|O_EXCL|O_NOCTTY|O_CLOEXEC, 0644);
+ if (converted_fd < 0)
+ return log_error_errno(errno, "Failed to create %s: %m", t);
+
+ r = qcow2_convert(f->disk_fd, converted_fd);
+ if (r < 0) {
+ unlink(t);
+ return log_error_errno(r, "Failed to convert qcow2 image: %m");
+ }
+
+ unlink(f->temp_path);
+ free(f->temp_path);
+
+ f->temp_path = t;
+ t = NULL;
+
+ safe_close(f->disk_fd);
+ f->disk_fd = converted_fd;
+ converted_fd = -1;
+
+ return 1;
+}
+
static void raw_import_curl_on_finished(CurlGlue *g, CURL *curl, CURLcode result) {
RawImportFile *f = NULL;
struct stat st;
@@ -288,6 +332,10 @@ static void raw_import_curl_on_finished(CurlGlue *g, CURL *curl, CURLcode result
goto fail;
}
+ r = raw_import_maybe_convert_qcow2(f);
+ if (r < 0)
+ goto fail;
+
if (f->etag)
(void) fsetxattr(f->disk_fd, "user.source_etag", f->etag, strlen(f->etag), 0);
if (f->url)
diff --git a/src/import/import.c b/src/import/import.c
index e457adf629..af8d0ec42b 100644
--- a/src/import/import.c
+++ b/src/import/import.c
@@ -45,10 +45,48 @@ static void on_raw_finished(RawImport *import, int error, void *userdata) {
sd_event_exit(event, error);
}
+static int strip_raw_suffixes(const char *p, char **ret) {
+ static const char suffixes[] =
+ ".xz\0"
+ ".raw\0"
+ ".qcow2\0"
+ ".img\0";
+
+ _cleanup_free_ char *q = NULL;
+
+ q = strdup(p);
+ if (!q)
+ return -ENOMEM;
+
+ for (;;) {
+ const char *sfx;
+ bool changed = false;
+
+ NULSTR_FOREACH(sfx, suffixes) {
+ char *e;
+
+ e = endswith(q, sfx);
+ if (e) {
+ *e = 0;
+ changed = true;
+ }
+ }
+
+ if (!changed)
+ break;
+ }
+
+ *ret = q;
+ q = NULL;
+
+ return 0;
+}
+
static int pull_raw(int argc, char *argv[], void *userdata) {
_cleanup_(raw_import_unrefp) RawImport *import = NULL;
_cleanup_event_unref_ sd_event *event = NULL;
- const char *url, *local, *suffix;
+ const char *url, *local;
+ _cleanup_free_ char *l = NULL;
int r;
url = argv[1];
@@ -79,13 +117,11 @@ static int pull_raw(int argc, char *argv[], void *userdata) {
if (local) {
const char *p;
- suffix = endswith(local, ".raw.xz");
- if (!suffix)
- suffix = endswith(local, ".raw");
- if (!suffix)
- suffix = endswith(local, ".xz");
- if (suffix)
- local = strndupa(local, suffix - local);
+ r = strip_raw_suffixes(local, &l);
+ if (r < 0)
+ return log_oom();
+
+ local = l;
if (!machine_name_is_valid(local)) {
log_error("Local image name '%s' is not valid.", local);
diff --git a/src/import/qcow2-util.c b/src/import/qcow2-util.c
new file mode 100644
index 0000000000..c84c6aa0d7
--- /dev/null
+++ b/src/import/qcow2-util.c
@@ -0,0 +1,347 @@
+/*-*- Mode: C; c-basic-offset: 8; indent-tabs-mode: nil -*-*/
+
+/***
+ This file is part of systemd.
+
+ Copyright 2015 Lennart Poettering
+
+ systemd is free software; you can redistribute it and/or modify it
+ under the terms of the GNU Lesser General Public License as published by
+ the Free Software Foundation; either version 2.1 of the License, or
+ (at your option) any later version.
+
+ systemd 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
+ Lesser General Public License for more details.
+
+ You should have received a copy of the GNU Lesser General Public License
+ along with systemd; If not, see <http://www.gnu.org/licenses/>.
+***/
+
+#include <zlib.h>
+
+#include "util.h"
+#include "sparse-endian.h"
+#include "qcow2-util.h"
+
+#define QCOW2_MAGIC 0x514649fb
+
+#define QCOW2_COPIED (1ULL << 63)
+#define QCOW2_COMPRESSED (1ULL << 62)
+#define QCOW2_ZERO (1ULL << 0)
+
+typedef struct _packed_ Header {
+ be32_t magic;
+ be32_t version;
+
+ be64_t backing_file_offset;
+ be32_t backing_file_size;
+
+ be32_t cluster_bits;
+ be64_t size;
+ be32_t crypt_method;
+
+ be32_t l1_size;
+ be64_t l1_table_offset;
+
+ be64_t refcount_table_offset;
+ be32_t refcount_table_clusters;
+
+ be32_t nb_snapshots;
+ be64_t snapshots_offset;
+
+ /* The remainder is only present on QCOW3 */
+ be64_t incompatible_features;
+ be64_t compatible_features;
+ be64_t autoclear_features;
+
+ be32_t refcount_order;
+ be32_t header_length;
+} Header;
+
+#define HEADER_MAGIC(header) be32toh((header)->magic)
+#define HEADER_VERSION(header) be32toh((header)->version)
+#define HEADER_CLUSTER_BITS(header) be32toh((header)->cluster_bits)
+#define HEADER_CLUSTER_SIZE(header) (1ULL << HEADER_CLUSTER_BITS(header))
+#define HEADER_L2_BITS(header) (HEADER_CLUSTER_BITS(header) - 3)
+#define HEADER_SIZE(header) be64toh((header)->size)
+#define HEADER_CRYPT_METHOD(header) be32toh((header)->crypt_method)
+#define HEADER_L1_SIZE(header) be32toh((header)->l1_size)
+#define HEADER_L2_SIZE(header) (HEADER_CLUSTER_SIZE(header)/sizeof(uint64_t))
+#define HEADER_L1_TABLE_OFFSET(header) be64toh((header)->l1_table_offset)
+
+static uint32_t HEADER_HEADER_LENGTH(const Header *h) {
+ if (HEADER_VERSION(h) < 3)
+ return offsetof(Header, incompatible_features);
+
+ return be32toh(h->header_length);
+}
+
+static int copy_cluster(
+ int sfd, uint64_t soffset,
+ int dfd, uint64_t doffset,
+ uint64_t cluster_size,
+ void *buffer) {
+
+ ssize_t l;
+
+ l = pread(sfd, buffer, cluster_size, soffset);
+ if (l < 0)
+ return -errno;
+ if ((uint64_t) l != cluster_size)
+ return -EIO;
+
+ l = pwrite(dfd, buffer, cluster_size, doffset);
+ if (l < 0)
+ return -errno;
+ if ((uint64_t) l != cluster_size)
+ return -EIO;
+
+ return 0;
+}
+
+static int decompress_cluster(
+ int sfd, uint64_t soffset,
+ int dfd, uint64_t doffset,
+ uint64_t compressed_size,
+ uint64_t cluster_size,
+ void *buffer1,
+ void *buffer2) {
+
+ _cleanup_free_ void *large_buffer = NULL;
+ z_stream s = {};
+ uint64_t sz;
+ ssize_t l;
+ int r;
+
+ if (compressed_size > cluster_size) {
+ /* The usual cluster buffer doesn't suffice, let's
+ * allocate a larger one, temporarily */
+
+ large_buffer = malloc(compressed_size);
+ if (!large_buffer)
+ return -ENOMEM;
+
+ buffer1 = large_buffer;
+ }
+
+ l = pread(sfd, buffer1, compressed_size, soffset);
+ if (l < 0)
+ return -errno;
+ if ((uint64_t) l != compressed_size)
+ return -EIO;
+
+ s.next_in = buffer1;
+ s.avail_in = compressed_size;
+ s.next_out = buffer2;
+ s.avail_out = cluster_size;
+
+ r = inflateInit2(&s, -12);
+ if (r != Z_OK)
+ return -EIO;
+
+ r = inflate(&s, Z_FINISH);
+ sz = (uint8_t*) s.next_out - (uint8_t*) buffer2;
+ inflateEnd(&s);
+ if (r != Z_STREAM_END || sz != cluster_size)
+ return -EIO;
+
+ l = pwrite(dfd, buffer2, cluster_size, doffset);
+ if (l < 0)
+ return -errno;
+ if ((uint64_t) l != cluster_size)
+ return -EIO;
+
+ return 0;
+}
+
+static int normalize_offset(
+ const Header *header,
+ uint64_t p,
+ uint64_t *ret,
+ bool *compressed,
+ uint64_t *compressed_size) {
+
+ uint64_t q;
+
+ q = be64toh(p);
+
+ if (q & QCOW2_COMPRESSED) {
+ uint64_t sz, csize_shift, csize_mask;
+
+ if (!compressed)
+ return -ENOTSUP;
+
+ csize_shift = 64 - 2 - (HEADER_CLUSTER_BITS(header) - 8);
+ csize_mask = (1ULL << (HEADER_CLUSTER_BITS(header) - 8)) - 1;
+ sz = (((q >> csize_shift) & csize_mask) + 1) * 512 - (q & 511);
+ q &= ((1ULL << csize_shift) - 1);
+
+ if (compressed_size)
+ *compressed_size = sz;
+
+ *compressed = true;
+
+ } else {
+ if (compressed) {
+ *compressed = false;
+ *compressed_size = 0;
+ }
+
+ if (q & QCOW2_ZERO) {
+ /* We make no distinction between zero blocks and holes */
+ *ret = 0;
+ return 0;
+ }
+
+ q &= ~QCOW2_COPIED;
+ }
+
+ *ret = q;
+ return q > 0; /* returns positive if not a hole */
+}
+
+static int verify_header(const Header *header) {
+ assert(header);
+
+ if (HEADER_MAGIC(header) != QCOW2_MAGIC)
+ return -EBADMSG;
+
+ if (HEADER_VERSION(header) != 2 &&
+ HEADER_VERSION(header) != 3)
+ return -ENOTSUP;
+
+ if (HEADER_CRYPT_METHOD(header) != 0)
+ return -ENOTSUP;
+
+ if (HEADER_CLUSTER_BITS(header) < 9) /* 512K */
+ return -EBADMSG;
+
+ if (HEADER_CLUSTER_BITS(header) > 21) /* 2MB */
+ return -EBADMSG;
+
+ if (HEADER_SIZE(header) % HEADER_CLUSTER_SIZE(header) != 0)
+ return -EBADMSG;
+
+ if (HEADER_L1_SIZE(header) > 32*1024*1024) /* 32MB */
+ return -EBADMSG;
+
+ if (HEADER_VERSION(header) == 3) {
+
+ if (header->incompatible_features != 0)
+ return -ENOTSUP;
+
+ if (HEADER_HEADER_LENGTH(header) < sizeof(Header))
+ return -EBADMSG;
+ }
+
+ return 0;
+}
+
+int qcow2_convert(int qcow2_fd, int raw_fd) {
+ _cleanup_free_ void *buffer1 = NULL, *buffer2 = NULL;
+ _cleanup_free_ be64_t *l1_table = NULL, *l2_table = NULL;
+ uint64_t sz, i;
+ Header header;
+ ssize_t l;
+ int r;
+
+ l = pread(qcow2_fd, &header, sizeof(header), 0);
+ if (l < 0)
+ return -errno;
+ if (l != sizeof(header))
+ return -EIO;
+
+ r = verify_header(&header);
+ if (r < 0)
+ return r;
+
+ l1_table = new(be64_t, HEADER_L1_SIZE(&header));
+ if (!l1_table)
+ return -ENOMEM;
+
+ l2_table = malloc(HEADER_CLUSTER_SIZE(&header));
+ if (!l2_table)
+ return -ENOMEM;
+
+ buffer1 = malloc(HEADER_CLUSTER_SIZE(&header));
+ if (!buffer1)
+ return -ENOMEM;
+
+ buffer2 = malloc(HEADER_CLUSTER_SIZE(&header));
+ if (!buffer2)
+ return -ENOMEM;
+
+ /* Empty the file if it exists, we rely on zero bits */
+ if (ftruncate(raw_fd, 0) < 0)
+ return -errno;
+
+ if (ftruncate(raw_fd, HEADER_SIZE(&header)) < 0)
+ return -errno;
+
+ sz = sizeof(uint64_t) * HEADER_L1_SIZE(&header);
+ l = pread(qcow2_fd, l1_table, sz, HEADER_L1_TABLE_OFFSET(&header));
+ if (l < 0)
+ return -errno;
+ if ((uint64_t) l != sz)
+ return -EIO;
+
+ for (i = 0; i < HEADER_L1_SIZE(&header); i ++) {
+ uint64_t l2_begin, j;
+
+ r = normalize_offset(&header, l1_table[i], &l2_begin, NULL, NULL);
+ if (r < 0)
+ return r;
+ if (r == 0)
+ continue;
+
+ l = pread(qcow2_fd, l2_table, HEADER_CLUSTER_SIZE(&header), l2_begin);
+ if (l < 0)
+ return -errno;
+ if ((uint64_t) l != HEADER_CLUSTER_SIZE(&header))
+ return -EIO;
+
+ for (j = 0; j < HEADER_L2_SIZE(&header); j++) {
+ uint64_t data_begin, p, compressed_size;
+ bool compressed;
+
+ p = ((i << HEADER_L2_BITS(&header)) + j) << HEADER_CLUSTER_BITS(&header);
+
+ r = normalize_offset(&header, l2_table[j], &data_begin, &compressed, &compressed_size);
+ if (r < 0)
+ return r;
+ if (r == 0)
+ continue;
+
+ if (compressed)
+ r = decompress_cluster(
+ qcow2_fd, data_begin,
+ raw_fd, p,
+ compressed_size, HEADER_CLUSTER_SIZE(&header),
+ buffer1, buffer2);
+ else
+ r = copy_cluster(
+ qcow2_fd, data_begin,
+ raw_fd, p,
+ HEADER_CLUSTER_SIZE(&header), buffer1);
+ if (r < 0)
+ return r;
+ }
+ }
+
+ return 0;
+}
+
+int qcow2_detect(int fd) {
+ be32_t id;
+ ssize_t l;
+
+ l = pread(fd, &id, sizeof(id), 0);
+ if (l < 0)
+ return -errno;
+ if (l != sizeof(id))
+ return -EIO;
+
+ return htobe32(QCOW2_MAGIC) == id;
+}
diff --git a/src/import/qcow2-util.h b/src/import/qcow2-util.h
new file mode 100644
index 0000000000..be7fd1d0c9
--- /dev/null
+++ b/src/import/qcow2-util.h
@@ -0,0 +1,25 @@
+/*-*- Mode: C; c-basic-offset: 8; indent-tabs-mode: nil -*-*/
+
+#pragma once
+
+/***
+ This file is part of systemd.
+
+ Copyright 2015 Lennart Poettering
+
+ systemd is free software; you can redistribute it and/or modify it
+ under the terms of the GNU Lesser General Public License as published by
+ the Free Software Foundation; either version 2.1 of the License, or
+ (at your option) any later version.
+
+ systemd 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
+ Lesser General Public License for more details.
+
+ You should have received a copy of the GNU Lesser General Public License
+ along with systemd; If not, see <http://www.gnu.org/licenses/>.
+***/
+
+int qcow2_detect(int fd);
+int qcow2_convert(int qcow2_fd, int raw_fd);
diff --git a/src/import/test-qcow2.c b/src/import/test-qcow2.c
new file mode 100644
index 0000000000..9a6c3e8b35
--- /dev/null
+++ b/src/import/test-qcow2.c
@@ -0,0 +1,55 @@
+/*-*- Mode: C; c-basic-offset: 8; indent-tabs-mode: nil -*-*/
+
+/***
+ This file is part of systemd.
+
+ Copyright 2015 Lennart Poettering
+
+ systemd is free software; you can redistribute it and/or modify it
+ under the terms of the GNU Lesser General Public License as published by
+ the Free Software Foundation; either version 2.1 of the License, or
+ (at your option) any later version.
+
+ systemd 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
+ Lesser General Public License for more details.
+
+ You should have received a copy of the GNU Lesser General Public License
+ along with systemd; If not, see <http://www.gnu.org/licenses/>.
+***/
+
+#include "log.h"
+#include "util.h"
+
+#include "qcow2-util.h"
+
+int main(int argc, char *argv[]) {
+ _cleanup_close_ int sfd = -1, dfd = -1;
+ int r;
+
+ if (argc != 3) {
+ log_error("Needs two arguments.");
+ return EXIT_FAILURE;
+ }
+
+ sfd = open(argv[1], O_RDONLY|O_CLOEXEC|O_NOCTTY);
+ if (sfd < 0) {
+ log_error_errno(errno, "Can't open source file: %m");
+ return EXIT_FAILURE;
+ }
+
+ dfd = open(argv[2], O_WRONLY|O_CREAT|O_CLOEXEC|O_NOCTTY, 0666);
+ if (dfd < 0) {
+ log_error_errno(errno, "Can't open destination file: %m");
+ return EXIT_FAILURE;
+ }
+
+ r = qcow2_convert(sfd, dfd);
+ if (r < 0) {
+ log_error_errno(r, "Failed to unpack: %m");
+ return EXIT_FAILURE;
+ }
+
+ return EXIT_SUCCESS;
+}
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