mirror of
https://github.com/systemd/systemd.git
synced 2024-11-07 18:27:04 +03:00
730 lines
22 KiB
C
730 lines
22 KiB
C
/*-*- Mode: C; c-basic-offset: 8; indent-tabs-mode: nil -*-*/
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/***
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This file is part of systemd.
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Copyright 2015 Lennart Poettering
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systemd is free software; you can redistribute it and/or modify it
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under the terms of the GNU Lesser General Public License as published by
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the Free Software Foundation; either version 2.1 of the License, or
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(at your option) any later version.
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systemd is distributed in the hope that it will be useful, but
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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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Lesser General Public License for more details.
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You should have received a copy of the GNU Lesser General Public License
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along with systemd; If not, see <http://www.gnu.org/licenses/>.
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***/
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#include <sys/xattr.h>
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#include "strv.h"
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#include "import-job.h"
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ImportJob* import_job_unref(ImportJob *j) {
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if (!j)
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return NULL;
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curl_glue_remove_and_free(j->glue, j->curl);
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curl_slist_free_all(j->request_header);
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safe_close(j->disk_fd);
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if (j->compressed == IMPORT_JOB_XZ)
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lzma_end(&j->xz);
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else if (j->compressed == IMPORT_JOB_GZIP)
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inflateEnd(&j->gzip);
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else if (j->compressed == IMPORT_JOB_BZIP2)
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BZ2_bzDecompressEnd(&j->bzip2);
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if (j->checksum_context)
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gcry_md_close(j->checksum_context);
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free(j->url);
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free(j->etag);
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strv_free(j->old_etags);
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free(j->payload);
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free(j->checksum);
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free(j);
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return NULL;
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}
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static void import_job_finish(ImportJob *j, int ret) {
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assert(j);
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if (j->state == IMPORT_JOB_DONE ||
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j->state == IMPORT_JOB_FAILED)
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return;
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if (ret == 0) {
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j->state = IMPORT_JOB_DONE;
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log_info("Download of %s complete.", j->url);
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} else {
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j->state = IMPORT_JOB_FAILED;
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j->error = ret;
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}
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if (j->on_finished)
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j->on_finished(j);
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}
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void import_job_curl_on_finished(CurlGlue *g, CURL *curl, CURLcode result) {
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ImportJob *j = NULL;
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CURLcode code;
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long status;
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int r;
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if (curl_easy_getinfo(curl, CURLINFO_PRIVATE, &j) != CURLE_OK)
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return;
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if (!j || j->state == IMPORT_JOB_DONE || j->state == IMPORT_JOB_FAILED)
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return;
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if (result != CURLE_OK) {
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log_error("Transfer failed: %s", curl_easy_strerror(result));
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r = -EIO;
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goto finish;
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}
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code = curl_easy_getinfo(curl, CURLINFO_RESPONSE_CODE, &status);
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if (code != CURLE_OK) {
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log_error("Failed to retrieve response code: %s", curl_easy_strerror(code));
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r = -EIO;
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goto finish;
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} else if (status == 304) {
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log_info("Image already downloaded. Skipping download.");
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j->etag_exists = true;
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r = 0;
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goto finish;
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} else if (status >= 300) {
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log_error("HTTP request to %s failed with code %li.", j->url, status);
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r = -EIO;
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goto finish;
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} else if (status < 200) {
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log_error("HTTP request to %s finished with unexpected code %li.", j->url, status);
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r = -EIO;
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goto finish;
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}
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if (j->state != IMPORT_JOB_RUNNING) {
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log_error("Premature connection termination.");
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r = -EIO;
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goto finish;
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}
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if (j->content_length != (uint64_t) -1 &&
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j->content_length != j->written_compressed) {
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log_error("Download truncated.");
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r = -EIO;
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goto finish;
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}
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if (j->checksum_context) {
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uint8_t *k;
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k = gcry_md_read(j->checksum_context, GCRY_MD_SHA256);
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if (!k) {
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log_error("Failed to get checksum.");
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r = -EIO;
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goto finish;
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}
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j->checksum = hexmem(k, gcry_md_get_algo_dlen(GCRY_MD_SHA256));
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if (!j->checksum) {
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r = log_oom();
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goto finish;
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}
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log_debug("SHA256 of %s is %s.", j->url, j->checksum);
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}
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if (j->disk_fd >= 0 && j->allow_sparse) {
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/* Make sure the file size is right, in case the file was
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* sparse and we just seeked for the last part */
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if (ftruncate(j->disk_fd, j->written_uncompressed) < 0) {
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log_error_errno(errno, "Failed to truncate file: %m");
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r = -errno;
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goto finish;
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}
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if (j->etag)
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(void) fsetxattr(j->disk_fd, "user.source_etag", j->etag, strlen(j->etag), 0);
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if (j->url)
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(void) fsetxattr(j->disk_fd, "user.source_url", j->url, strlen(j->url), 0);
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if (j->mtime != 0) {
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struct timespec ut[2];
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timespec_store(&ut[0], j->mtime);
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ut[1] = ut[0];
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(void) futimens(j->disk_fd, ut);
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(void) fd_setcrtime(j->disk_fd, j->mtime);
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}
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}
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r = 0;
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finish:
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import_job_finish(j, r);
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}
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static int import_job_write_uncompressed(ImportJob *j, void *p, size_t sz) {
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ssize_t n;
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assert(j);
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assert(p);
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if (sz <= 0)
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return 0;
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if (j->written_uncompressed + sz < j->written_uncompressed) {
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log_error("File too large, overflow");
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return -EOVERFLOW;
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}
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if (j->written_uncompressed + sz > j->uncompressed_max) {
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log_error("File overly large, refusing");
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return -EFBIG;
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}
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if (j->disk_fd >= 0) {
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if (j->allow_sparse)
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n = sparse_write(j->disk_fd, p, sz, 64);
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else
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n = write(j->disk_fd, p, sz);
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if (n < 0) {
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log_error_errno(errno, "Failed to write file: %m");
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return -errno;
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}
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if ((size_t) n < sz) {
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log_error("Short write");
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return -EIO;
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}
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} else {
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if (!GREEDY_REALLOC(j->payload, j->payload_allocated, j->payload_size + sz))
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return log_oom();
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memcpy(j->payload + j->payload_size, p, sz);
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j->payload_size += sz;
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}
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j->written_uncompressed += sz;
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return 0;
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}
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static int import_job_write_compressed(ImportJob *j, void *p, size_t sz) {
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int r;
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assert(j);
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assert(p);
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if (sz <= 0)
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return 0;
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if (j->written_compressed + sz < j->written_compressed) {
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log_error("File too large, overflow");
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return -EOVERFLOW;
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}
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if (j->written_compressed + sz > j->compressed_max) {
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log_error("File overly large, refusing.");
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return -EFBIG;
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}
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if (j->content_length != (uint64_t) -1 &&
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j->written_compressed + sz > j->content_length) {
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log_error("Content length incorrect.");
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return -EFBIG;
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}
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if (j->checksum_context)
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gcry_md_write(j->checksum_context, p, sz);
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switch (j->compressed) {
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case IMPORT_JOB_UNCOMPRESSED:
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r = import_job_write_uncompressed(j, p, sz);
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if (r < 0)
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return r;
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break;
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case IMPORT_JOB_XZ:
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j->xz.next_in = p;
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j->xz.avail_in = sz;
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while (j->xz.avail_in > 0) {
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uint8_t buffer[16 * 1024];
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lzma_ret lzr;
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j->xz.next_out = buffer;
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j->xz.avail_out = sizeof(buffer);
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lzr = lzma_code(&j->xz, LZMA_RUN);
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if (lzr != LZMA_OK && lzr != LZMA_STREAM_END) {
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log_error("Decompression error.");
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return -EIO;
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}
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r = import_job_write_uncompressed(j, buffer, sizeof(buffer) - j->xz.avail_out);
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if (r < 0)
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return r;
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}
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break;
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case IMPORT_JOB_GZIP:
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j->gzip.next_in = p;
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j->gzip.avail_in = sz;
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while (j->gzip.avail_in > 0) {
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uint8_t buffer[16 * 1024];
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j->gzip.next_out = buffer;
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j->gzip.avail_out = sizeof(buffer);
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r = inflate(&j->gzip, Z_NO_FLUSH);
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if (r != Z_OK && r != Z_STREAM_END) {
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log_error("Decompression error.");
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return -EIO;
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}
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r = import_job_write_uncompressed(j, buffer, sizeof(buffer) - j->gzip.avail_out);
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if (r < 0)
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return r;
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}
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break;
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case IMPORT_JOB_BZIP2:
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j->bzip2.next_in = p;
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j->bzip2.avail_in = sz;
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while (j->bzip2.avail_in > 0) {
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uint8_t buffer[16 * 1024];
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j->bzip2.next_out = (char*) buffer;
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j->bzip2.avail_out = sizeof(buffer);
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r = BZ2_bzDecompress(&j->bzip2);
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if (r != BZ_OK && r != BZ_STREAM_END) {
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log_error("Decompression error.");
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return -EIO;
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}
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r = import_job_write_uncompressed(j, buffer, sizeof(buffer) - j->bzip2.avail_out);
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if (r < 0)
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return r;
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}
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break;
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default:
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assert_not_reached("Unknown compression");
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}
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j->written_compressed += sz;
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return 0;
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}
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static int import_job_open_disk(ImportJob *j) {
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int r;
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assert(j);
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if (j->on_open_disk) {
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r = j->on_open_disk(j);
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if (r < 0)
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return r;
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}
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if (j->disk_fd >= 0) {
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/* Check if we can do sparse files */
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if (lseek(j->disk_fd, SEEK_SET, 0) == 0)
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j->allow_sparse = true;
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else {
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if (errno != ESPIPE)
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return log_error_errno(errno, "Failed to seek on file descriptor: %m");
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j->allow_sparse = false;
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}
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}
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if (j->calc_checksum) {
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if (gcry_md_open(&j->checksum_context, GCRY_MD_SHA256, 0) != 0) {
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log_error("Failed to initialize hash context.");
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return -EIO;
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}
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}
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return 0;
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}
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static int import_job_detect_compression(ImportJob *j) {
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static const uint8_t xz_signature[] = {
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0xfd, '7', 'z', 'X', 'Z', 0x00
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};
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static const uint8_t gzip_signature[] = {
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0x1f, 0x8b
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};
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static const uint8_t bzip2_signature[] = {
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'B', 'Z', 'h'
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};
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_cleanup_free_ uint8_t *stub = NULL;
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size_t stub_size;
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int r;
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assert(j);
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if (j->payload_size < MAX3(sizeof(xz_signature),
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sizeof(gzip_signature),
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sizeof(bzip2_signature)))
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return 0;
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if (memcmp(j->payload, xz_signature, sizeof(xz_signature)) == 0)
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j->compressed = IMPORT_JOB_XZ;
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else if (memcmp(j->payload, gzip_signature, sizeof(gzip_signature)) == 0)
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j->compressed = IMPORT_JOB_GZIP;
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else if (memcmp(j->payload, bzip2_signature, sizeof(bzip2_signature)) == 0)
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j->compressed = IMPORT_JOB_BZIP2;
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else
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j->compressed = IMPORT_JOB_UNCOMPRESSED;
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log_debug("Stream is XZ compressed: %s", yes_no(j->compressed == IMPORT_JOB_XZ));
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log_debug("Stream is GZIP compressed: %s", yes_no(j->compressed == IMPORT_JOB_GZIP));
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log_debug("Stream is BZIP2 compressed: %s", yes_no(j->compressed == IMPORT_JOB_BZIP2));
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if (j->compressed == IMPORT_JOB_XZ) {
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lzma_ret xzr;
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xzr = lzma_stream_decoder(&j->xz, UINT64_MAX, LZMA_TELL_UNSUPPORTED_CHECK);
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if (xzr != LZMA_OK) {
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log_error("Failed to initialize XZ decoder.");
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return -EIO;
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}
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}
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if (j->compressed == IMPORT_JOB_GZIP) {
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r = inflateInit2(&j->gzip, 15+16);
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if (r != Z_OK) {
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log_error("Failed to initialize gzip decoder.");
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return -EIO;
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}
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}
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if (j->compressed == IMPORT_JOB_BZIP2) {
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r = BZ2_bzDecompressInit(&j->bzip2, 0, 0);
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if (r != BZ_OK) {
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log_error("Failed to initialize bzip2 decoder.");
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return -EIO;
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}
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}
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r = import_job_open_disk(j);
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if (r < 0)
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return r;
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/* Now, take the payload we read so far, and decompress it */
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stub = j->payload;
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stub_size = j->payload_size;
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j->payload = NULL;
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j->payload_size = 0;
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j->payload_allocated = 0;
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j->state = IMPORT_JOB_RUNNING;
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r = import_job_write_compressed(j, stub, stub_size);
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if (r < 0)
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return r;
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return 0;
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}
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static size_t import_job_write_callback(void *contents, size_t size, size_t nmemb, void *userdata) {
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ImportJob *j = userdata;
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size_t sz = size * nmemb;
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int r;
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assert(contents);
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assert(j);
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switch (j->state) {
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case IMPORT_JOB_ANALYZING:
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/* Let's first check what it actually is */
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if (!GREEDY_REALLOC(j->payload, j->payload_allocated, j->payload_size + sz)) {
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r = log_oom();
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goto fail;
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}
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memcpy(j->payload + j->payload_size, contents, sz);
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j->payload_size += sz;
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r = import_job_detect_compression(j);
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if (r < 0)
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goto fail;
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break;
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case IMPORT_JOB_RUNNING:
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r = import_job_write_compressed(j, contents, sz);
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if (r < 0)
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goto fail;
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break;
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case IMPORT_JOB_DONE:
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case IMPORT_JOB_FAILED:
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r = -ESTALE;
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goto fail;
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default:
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assert_not_reached("Impossible state.");
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}
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return sz;
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fail:
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import_job_finish(j, r);
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return 0;
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}
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static size_t import_job_header_callback(void *contents, size_t size, size_t nmemb, void *userdata) {
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ImportJob *j = userdata;
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size_t sz = size * nmemb;
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_cleanup_free_ char *length = NULL, *last_modified = NULL;
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char *etag;
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int r;
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assert(contents);
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assert(j);
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if (j->state == IMPORT_JOB_DONE || j->state == IMPORT_JOB_FAILED) {
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r = -ESTALE;
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goto fail;
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}
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assert(j->state == IMPORT_JOB_ANALYZING);
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r = curl_header_strdup(contents, sz, "ETag:", &etag);
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if (r < 0) {
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log_oom();
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goto fail;
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}
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if (r > 0) {
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free(j->etag);
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j->etag = etag;
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if (strv_contains(j->old_etags, j->etag)) {
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log_info("Image already downloaded. Skipping download.");
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j->etag_exists = true;
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import_job_finish(j, 0);
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return sz;
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}
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return sz;
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}
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r = curl_header_strdup(contents, sz, "Content-Length:", &length);
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if (r < 0) {
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log_oom();
|
|
goto fail;
|
|
}
|
|
if (r > 0) {
|
|
(void) safe_atou64(length, &j->content_length);
|
|
|
|
if (j->content_length != (uint64_t) -1) {
|
|
char bytes[FORMAT_BYTES_MAX];
|
|
|
|
if (j->content_length > j->compressed_max) {
|
|
log_error("Content too large.");
|
|
r = -EFBIG;
|
|
goto fail;
|
|
}
|
|
|
|
log_info("Downloading %s for %s.", format_bytes(bytes, sizeof(bytes), j->content_length), j->url);
|
|
}
|
|
|
|
return sz;
|
|
}
|
|
|
|
r = curl_header_strdup(contents, sz, "Last-Modified:", &last_modified);
|
|
if (r < 0) {
|
|
log_oom();
|
|
goto fail;
|
|
}
|
|
if (r > 0) {
|
|
(void) curl_parse_http_time(last_modified, &j->mtime);
|
|
return sz;
|
|
}
|
|
|
|
if (j->on_header) {
|
|
r = j->on_header(j, contents, sz);
|
|
if (r < 0)
|
|
goto fail;
|
|
}
|
|
|
|
return sz;
|
|
|
|
fail:
|
|
import_job_finish(j, r);
|
|
return 0;
|
|
}
|
|
|
|
static int import_job_progress_callback(void *userdata, curl_off_t dltotal, curl_off_t dlnow, curl_off_t ultotal, curl_off_t ulnow) {
|
|
ImportJob *j = userdata;
|
|
unsigned percent;
|
|
usec_t n;
|
|
|
|
assert(j);
|
|
|
|
if (dltotal <= 0)
|
|
return 0;
|
|
|
|
percent = ((100 * dlnow) / dltotal);
|
|
n = now(CLOCK_MONOTONIC);
|
|
|
|
if (n > j->last_status_usec + USEC_PER_SEC &&
|
|
percent != j->progress_percent &&
|
|
dlnow < dltotal) {
|
|
char buf[FORMAT_TIMESPAN_MAX];
|
|
|
|
if (n - j->start_usec > USEC_PER_SEC && dlnow > 0) {
|
|
char y[FORMAT_BYTES_MAX];
|
|
usec_t left, done;
|
|
|
|
done = n - j->start_usec;
|
|
left = (usec_t) (((double) done * (double) dltotal) / dlnow) - done;
|
|
|
|
log_info("Got %u%% of %s. %s left at %s/s.",
|
|
percent,
|
|
j->url,
|
|
format_timespan(buf, sizeof(buf), left, USEC_PER_SEC),
|
|
format_bytes(y, sizeof(y), (uint64_t) ((double) dlnow / ((double) done / (double) USEC_PER_SEC))));
|
|
} else
|
|
log_info("Got %u%% of %s.", percent, j->url);
|
|
|
|
j->progress_percent = percent;
|
|
j->last_status_usec = n;
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
int import_job_new(ImportJob **ret, const char *url, CurlGlue *glue, void *userdata) {
|
|
_cleanup_(import_job_unrefp) ImportJob *j = NULL;
|
|
|
|
assert(url);
|
|
assert(glue);
|
|
assert(ret);
|
|
|
|
j = new0(ImportJob, 1);
|
|
if (!j)
|
|
return -ENOMEM;
|
|
|
|
j->state = IMPORT_JOB_INIT;
|
|
j->disk_fd = -1;
|
|
j->userdata = userdata;
|
|
j->glue = glue;
|
|
j->content_length = (uint64_t) -1;
|
|
j->start_usec = now(CLOCK_MONOTONIC);
|
|
j->compressed_max = j->uncompressed_max = 8LLU * 1024LLU * 1024LLU * 1024LLU; /* 8GB */
|
|
|
|
j->url = strdup(url);
|
|
if (!j->url)
|
|
return -ENOMEM;
|
|
|
|
*ret = j;
|
|
j = NULL;
|
|
|
|
return 0;
|
|
}
|
|
|
|
int import_job_begin(ImportJob *j) {
|
|
int r;
|
|
|
|
assert(j);
|
|
|
|
if (j->state != IMPORT_JOB_INIT)
|
|
return -EBUSY;
|
|
|
|
r = curl_glue_make(&j->curl, j->url, j);
|
|
if (r < 0)
|
|
return r;
|
|
|
|
if (!strv_isempty(j->old_etags)) {
|
|
_cleanup_free_ char *cc = NULL, *hdr = NULL;
|
|
|
|
cc = strv_join(j->old_etags, ", ");
|
|
if (!cc)
|
|
return -ENOMEM;
|
|
|
|
hdr = strappend("If-None-Match: ", cc);
|
|
if (!hdr)
|
|
return -ENOMEM;
|
|
|
|
if (!j->request_header) {
|
|
j->request_header = curl_slist_new(hdr, NULL);
|
|
if (!j->request_header)
|
|
return -ENOMEM;
|
|
} else {
|
|
struct curl_slist *l;
|
|
|
|
l = curl_slist_append(j->request_header, hdr);
|
|
if (!l)
|
|
return -ENOMEM;
|
|
|
|
j->request_header = l;
|
|
}
|
|
}
|
|
|
|
if (j->request_header) {
|
|
if (curl_easy_setopt(j->curl, CURLOPT_HTTPHEADER, j->request_header) != CURLE_OK)
|
|
return -EIO;
|
|
}
|
|
|
|
if (curl_easy_setopt(j->curl, CURLOPT_WRITEFUNCTION, import_job_write_callback) != CURLE_OK)
|
|
return -EIO;
|
|
|
|
if (curl_easy_setopt(j->curl, CURLOPT_WRITEDATA, j) != CURLE_OK)
|
|
return -EIO;
|
|
|
|
if (curl_easy_setopt(j->curl, CURLOPT_HEADERFUNCTION, import_job_header_callback) != CURLE_OK)
|
|
return -EIO;
|
|
|
|
if (curl_easy_setopt(j->curl, CURLOPT_HEADERDATA, j) != CURLE_OK)
|
|
return -EIO;
|
|
|
|
if (curl_easy_setopt(j->curl, CURLOPT_XFERINFOFUNCTION, import_job_progress_callback) != CURLE_OK)
|
|
return -EIO;
|
|
|
|
if (curl_easy_setopt(j->curl, CURLOPT_XFERINFODATA, j) != CURLE_OK)
|
|
return -EIO;
|
|
|
|
if (curl_easy_setopt(j->curl, CURLOPT_NOPROGRESS, 0) != CURLE_OK)
|
|
return -EIO;
|
|
|
|
r = curl_glue_add(j->glue, j->curl);
|
|
if (r < 0)
|
|
return r;
|
|
|
|
j->state = IMPORT_JOB_ANALYZING;
|
|
|
|
return 0;
|
|
}
|