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-rw-r--r--src/import/import-raw.c187
-rw-r--r--src/import/import.c6
2 files changed, 165 insertions, 28 deletions
diff --git a/src/import/import-raw.c b/src/import/import-raw.c
index ac9e6eb847..f1b36cbfcc 100644
--- a/src/import/import-raw.c
+++ b/src/import/import-raw.c
@@ -22,6 +22,7 @@
#include <sys/xattr.h>
#include <linux/fs.h>
#include <curl/curl.h>
+#include <lzma.h>
#include "hashmap.h"
#include "utf8.h"
@@ -47,7 +48,11 @@ struct RawImportFile {
char **old_etags;
uint64_t content_length;
- uint64_t written;
+ uint64_t written_compressed;
+ uint64_t written_uncompressed;
+
+ void *payload;
+ size_t payload_size;
usec_t mtime;
@@ -55,6 +60,9 @@ struct RawImportFile {
bool done;
int disk_fd;
+
+ lzma_stream lzma;
+ bool compressed;
};
struct RawImport {
@@ -72,6 +80,8 @@ struct RawImport {
#define FILENAME_ESCAPE "/.#\"\'"
+#define RAW_MAX_SIZE (1024LLU*1024LLU*1024LLU*8) /* 8 GB */
+
static RawImportFile *raw_import_file_unref(RawImportFile *f) {
if (!f)
return NULL;
@@ -93,6 +103,7 @@ static RawImportFile *raw_import_file_unref(RawImportFile *f) {
free(f->local);
free(f->etag);
strv_free(f->old_etags);
+ free(f->payload);
free(f);
return NULL;
@@ -271,7 +282,7 @@ static void raw_import_curl_on_finished(CurlGlue *g, CURL *curl, CURLcode result
}
if (f->content_length != (uint64_t) -1 &&
- f->content_length != f->written) {
+ f->content_length != f->written_compressed) {
log_error("Download truncated.");
r = -EIO;
goto fail;
@@ -346,50 +357,166 @@ static int raw_import_file_open_disk_for_write(RawImportFile *f) {
return 0;
}
-static size_t raw_import_file_write_callback(void *contents, size_t size, size_t nmemb, void *userdata) {
- RawImportFile *f = userdata;
- size_t sz = size * nmemb;
+static int raw_import_file_write_uncompressed(RawImportFile *f, void *p, size_t sz) {
ssize_t n;
- int r;
- assert(contents);
assert(f);
+ assert(p);
+ assert(sz > 0);
+ assert(f->disk_fd >= 0);
- if (f->done) {
- r = -ESTALE;
- goto fail;
+ if (f->written_uncompressed + sz < f->written_uncompressed) {
+ log_error("File too large, overflow");
+ return -EOVERFLOW;
}
- r = raw_import_file_open_disk_for_write(f);
- if (r < 0)
- goto fail;
+ if (f->written_uncompressed + sz > RAW_MAX_SIZE) {
+ log_error("File overly large, refusing");
+ return -EFBIG;
+ }
+
+ n = write(f->disk_fd, p, sz);
+ if (n < 0) {
+ log_error_errno(errno, "Failed to write file: %m");
+ return -errno;
+ }
+ if ((size_t) n < sz) {
+ log_error("Short write");
+ return -EIO;
+ }
+
+ f->written_uncompressed += sz;
- if (f->written + sz < f->written) {
+ return 0;
+}
+
+static int raw_import_file_write_compressed(RawImportFile *f, void *p, size_t sz) {
+ int r;
+
+ assert(f);
+ assert(p);
+ assert(sz > 0);
+ assert(f->disk_fd >= 0);
+
+ if (f->written_compressed + sz < f->written_compressed) {
log_error("File too large, overflow");
- r = -EOVERFLOW;
- goto fail;
+ return -EOVERFLOW;
}
if (f->content_length != (uint64_t) -1 &&
- f->written + sz > f->content_length) {
+ f->written_compressed + sz > f->content_length) {
log_error("Content length incorrect.");
- r = -EFBIG;
- goto fail;
+ return -EFBIG;
}
- n = write(f->disk_fd, contents, sz);
- if (n < 0) {
- log_error_errno(errno, "Failed to write file: %m");
- goto fail;
+ if (!f->compressed) {
+ r = raw_import_file_write_uncompressed(f, p, sz);
+ if (r < 0)
+ return r;
+ } else {
+ f->lzma.next_in = p;
+ f->lzma.avail_in = sz;
+
+ while (f->lzma.avail_in > 0) {
+ uint8_t buffer[16 * 1024];
+ lzma_ret lzr;
+
+ f->lzma.next_out = buffer;
+ f->lzma.avail_out = sizeof(buffer);
+
+ lzr = lzma_code(&f->lzma, LZMA_RUN);
+ if (lzr != LZMA_OK && lzr != LZMA_STREAM_END) {
+ log_error("Decompression error.");
+ return -EIO;
+ }
+
+ r = raw_import_file_write_uncompressed(f, buffer, sizeof(buffer) - f->lzma.avail_out);
+ if (r < 0)
+ return r;
+ }
}
- if ((size_t) n < sz) {
- log_error("Short write");
- r = -EIO;
+ f->written_compressed += sz;
+
+ return 0;
+}
+
+static int raw_import_file_detect_xz(RawImportFile *f) {
+ static const uint8_t xz_signature[] = {
+ '\xfd', '7', 'z', 'X', 'Z', '\x00'
+ };
+ lzma_ret lzr;
+ int r;
+
+ assert(f);
+
+ if (f->payload_size < sizeof(xz_signature))
+ return 0;
+
+ f->compressed = memcmp(f->payload, xz_signature, sizeof(xz_signature)) == 0;
+ log_debug("Stream is XZ compressed: %s", yes_no(f->compressed));
+
+ if (f->compressed) {
+ lzr = lzma_stream_decoder(&f->lzma, UINT64_MAX, LZMA_TELL_UNSUPPORTED_CHECK);
+ if (lzr != LZMA_OK) {
+ log_error("Failed to initialize LZMA decoder.");
+ return -EIO;
+ }
+ }
+
+ r = raw_import_file_open_disk_for_write(f);
+ if (r < 0)
+ return r;
+
+ r = raw_import_file_write_compressed(f, f->payload, f->payload_size);
+ if (r < 0)
+ return r;
+
+ free(f->payload);
+ f->payload = NULL;
+ f->payload_size = 0;
+
+ return 0;
+}
+
+static size_t raw_import_file_write_callback(void *contents, size_t size, size_t nmemb, void *userdata) {
+ RawImportFile *f = userdata;
+ size_t sz = size * nmemb;
+ int r;
+
+ assert(contents);
+ assert(f);
+
+ if (f->done) {
+ r = -ESTALE;
goto fail;
}
- f->written += sz;
+ if (f->disk_fd < 0) {
+ uint8_t *p;
+
+ /* We haven't opened the file yet, let's first check what it actually is */
+
+ p = realloc(f->payload, f->payload_size + sz);
+ if (!p) {
+ r = log_oom();
+ goto fail;
+ }
+
+ memcpy(p + f->payload_size, contents, sz);
+ f->payload_size = sz;
+ f->payload = p;
+
+ r = raw_import_file_detect_xz(f);
+ if (r < 0)
+ goto fail;
+
+ return sz;
+ }
+
+ r = raw_import_file_write_compressed(f, contents, sz);
+ if (r < 0)
+ goto fail;
return sz;
@@ -438,6 +565,12 @@ static size_t raw_import_file_header_callback(void *contents, size_t size, size_
}
if (r > 0) {
(void) safe_atou64(length, &f->content_length);
+
+ if (f->content_length != (uint64_t) -1) {
+ char bytes[FORMAT_BYTES_MAX];
+ log_info("Downloading %s.", format_bytes(bytes, sizeof(bytes), f->content_length));
+ }
+
return sz;
}
diff --git a/src/import/import.c b/src/import/import.c
index b4d859df1f..e457adf629 100644
--- a/src/import/import.c
+++ b/src/import/import.c
@@ -79,7 +79,11 @@ static int pull_raw(int argc, char *argv[], void *userdata) {
if (local) {
const char *p;
- suffix = endswith(local, ".raw");
+ suffix = endswith(local, ".raw.xz");
+ if (!suffix)
+ suffix = endswith(local, ".raw");
+ if (!suffix)
+ suffix = endswith(local, ".xz");
if (suffix)
local = strndupa(local, suffix - local);
generated by cgit v1.2.3-54-g00ecf (git 2.45.2) at 2024-12-11 08:43:00 +0000