From: Christian Couder <christian.couder@gmail.com>
To: git@vger.kernel.org
Cc: Junio C Hamano <gitster@pobox.com>, Jeff King <peff@peff.net>,
Ben Peart <Ben.Peart@microsoft.com>,
Jonathan Tan <jonathantanmy@google.com>,
Nguyen Thai Ngoc Duy <pclouds@gmail.com>,
Mike Hommey <mh@glandium.org>,
Lars Schneider <larsxschneider@gmail.com>,
Eric Wong <e@80x24.org>,
Christian Couder <chriscool@tuxfamily.org>,
Jeff Hostetler <jeffhost@microsoft.com>
Subject: [PATCH v2 25/36] odb-helper: add odb_helper_get_raw_object()
Date: Mon, 19 Mar 2018 14:31:36 +0100 [thread overview]
Message-ID: <20180319133147.15413-26-chriscool@tuxfamily.org> (raw)
In-Reply-To: <20180319133147.15413-1-chriscool@tuxfamily.org>
The existing odb_helper_get_object() is renamed
odb_helper_get_git_object() and a new odb_helper_get_raw_object()
is introduced to deal with external objects that are not in Git format.
Signed-off-by: Christian Couder <chriscool@tuxfamily.org>
---
odb-helper.c | 113 ++++++++++++++++++++++++++++++++++++++++++++++++++-
1 file changed, 111 insertions(+), 2 deletions(-)
diff --git a/odb-helper.c b/odb-helper.c
index 2734af793b..fdd062ec8d 100644
--- a/odb-helper.c
+++ b/odb-helper.c
@@ -235,8 +235,107 @@ int odb_helper_has_object(struct odb_helper *o, const unsigned char *sha1)
return !!odb_helper_lookup(o, sha1);
}
-int odb_helper_get_object(struct odb_helper *o, const unsigned char *sha1,
- int fd)
+static int odb_helper_get_raw_object(struct odb_helper *o,
+ const unsigned char *sha1,
+ int fd)
+{
+ struct odb_helper_object *obj;
+ struct odb_helper_cmd cmd;
+ unsigned long total_got = 0;
+
+ char hdr[32];
+ int hdrlen;
+
+ int ret = Z_STREAM_END;
+ unsigned char compressed[4096];
+ git_zstream stream;
+ git_SHA_CTX hash;
+ unsigned char real_sha1[20];
+
+ obj = odb_helper_lookup(o, sha1);
+ if (!obj)
+ return -1;
+
+ if (odb_helper_start(o, &cmd, 0, "get_raw_obj %s", sha1_to_hex(sha1)) < 0)
+ return -1;
+
+ /* Set it up */
+ git_deflate_init(&stream, zlib_compression_level);
+ stream.next_out = compressed;
+ stream.avail_out = sizeof(compressed);
+ git_SHA1_Init(&hash);
+
+ /* First header.. */
+ hdrlen = xsnprintf(hdr, sizeof(hdr), "%s %lu", type_name(obj->type), obj->size) + 1;
+ stream.next_in = (unsigned char *)hdr;
+ stream.avail_in = hdrlen;
+ while (git_deflate(&stream, 0) == Z_OK)
+ ; /* nothing */
+ git_SHA1_Update(&hash, hdr, hdrlen);
+
+ for (;;) {
+ unsigned char buf[4096];
+ int r;
+
+ r = xread(cmd.child.out, buf, sizeof(buf));
+ if (r < 0) {
+ error("unable to read from odb helper '%s': %s",
+ o->name, strerror(errno));
+ close(cmd.child.out);
+ odb_helper_finish(o, &cmd);
+ git_deflate_end(&stream);
+ return -1;
+ }
+ if (r == 0)
+ break;
+
+ total_got += r;
+
+ /* Then the data itself.. */
+ stream.next_in = (void *)buf;
+ stream.avail_in = r;
+ do {
+ unsigned char *in0 = stream.next_in;
+ ret = git_deflate(&stream, Z_FINISH);
+ git_SHA1_Update(&hash, in0, stream.next_in - in0);
+ write_or_die(fd, compressed, stream.next_out - compressed);
+ stream.next_out = compressed;
+ stream.avail_out = sizeof(compressed);
+ } while (ret == Z_OK);
+ }
+
+ close(cmd.child.out);
+ if (ret != Z_STREAM_END) {
+ warning("bad zlib data from odb helper '%s' for %s",
+ o->name, sha1_to_hex(sha1));
+ return -1;
+ }
+ ret = git_deflate_end_gently(&stream);
+ if (ret != Z_OK) {
+ warning("deflateEnd on object %s from odb helper '%s' failed (%d)",
+ sha1_to_hex(sha1), o->name, ret);
+ return -1;
+ }
+ git_SHA1_Final(real_sha1, &hash);
+ if (hashcmp(sha1, real_sha1)) {
+ warning("sha1 mismatch from odb helper '%s' for %s (got %s)",
+ o->name, sha1_to_hex(sha1), sha1_to_hex(real_sha1));
+ return -1;
+ }
+ if (odb_helper_finish(o, &cmd))
+ return -1;
+ if (total_got != obj->size) {
+ warning("size mismatch from odb helper '%s' for %s (%lu != %lu)",
+ o->name, sha1_to_hex(sha1), total_got, obj->size);
+ return -1;
+ }
+
+ return 0;
+}
+
+static int odb_helper_get_git_object(struct odb_helper *o,
+ const unsigned char *sha1,
+ int fd)
{
struct odb_helper_object *obj;
struct odb_helper_cmd cmd;
@@ -383,6 +482,16 @@ int odb_helper_get_many_direct(struct odb_helper *o,
return res;
}
+int odb_helper_get_object(struct odb_helper *o,
+ const unsigned char *sha1,
+ int fd)
+{
+ if (o->supported_capabilities & ODB_HELPER_CAP_GET_RAW_OBJ)
+ return odb_helper_get_raw_object(o, sha1, fd);
+ else
+ return odb_helper_get_git_object(o, sha1, fd);
+}
+
int odb_helper_put_object(struct odb_helper *o,
const void *buf, size_t len,
const char *type, unsigned char *sha1)
--
2.17.0.rc0.37.g8f476fabe9
next prev parent reply other threads:[~2018-03-19 13:34 UTC|newest]
Thread overview: 38+ messages / expand[flat|nested] mbox.gz Atom feed top
2018-03-19 13:31 [PATCH v2 00/36] Promisor remotes and external ODB support Christian Couder
2018-03-19 13:31 ` [PATCH v2 01/36] Add initial external odb support Christian Couder
2018-03-19 13:31 ` [PATCH v2 02/36] sha1_file: add prepare_external_alt_odb() Christian Couder
2018-03-19 13:31 ` [PATCH v2 03/36] Add GIT_NO_EXTERNAL_ODB env variable Christian Couder
2018-03-19 13:31 ` [PATCH v2 04/36] external-odb: add has_external_odb() Christian Couder
2018-03-19 13:31 ` [PATCH v2 05/36] external-odb: implement external_odb_get_direct Christian Couder
2018-03-19 13:31 ` [PATCH v2 06/36] sha1_file: prepare for external odbs Christian Couder
2018-03-19 13:31 ` [PATCH v2 07/36] odb-helper: add 'enum odb_helper_type' Christian Couder
2018-03-19 13:31 ` [PATCH v2 08/36] external-odb: add external_odb_reinit() Christian Couder
2018-03-19 13:31 ` [PATCH v2 09/36] external-odb: add script mode support Christian Couder
2018-03-19 13:31 ` [PATCH v2 10/36] odb-helper: add 'script_mode' to 'struct odb_helper' Christian Couder
2018-03-19 13:31 ` [PATCH v2 11/36] odb-helper: add odb_helper_init() to send 'init' instruction Christian Couder
2018-03-19 13:31 ` [PATCH v2 12/36] external-odb: add external_odb_get_many_direct() Christian Couder
2018-03-19 13:31 ` [PATCH v2 13/36] Use external_odb_get_direct() and has_external_odb() Christian Couder
2018-03-19 13:31 ` [PATCH v2 14/36] Use odb.origin.partialclonefilter instead of core.partialclonefilter Christian Couder
2018-03-19 13:31 ` [PATCH v2 15/36] external-odb: add 'get_direct' support Christian Couder
2018-03-19 13:31 ` [PATCH v2 16/36] t0500: add 'put_raw_obj' instruction to odb-helper script Christian Couder
2018-03-19 13:31 ` [PATCH v2 17/36] external odb: add 'put_raw_obj' support Christian Couder
2018-03-19 13:31 ` [PATCH v2 18/36] external-odb: accept only blobs for now Christian Couder
2018-03-19 13:31 ` [PATCH v2 19/36] t0500: add test for external odb write support Christian Couder
2018-03-19 13:31 ` [PATCH v2 20/36] Add t0510 to test external ODB transfer Christian Couder
2018-03-19 13:31 ` [PATCH v2 21/36] lib-httpd: pass config file to start_httpd() Christian Couder
2018-03-19 13:31 ` [PATCH v2 22/36] lib-httpd: add upload.sh Christian Couder
2018-03-19 13:31 ` [PATCH v2 23/36] lib-httpd: add list.sh Christian Couder
2018-03-19 13:31 ` [PATCH v2 24/36] lib-httpd: add apache-e-odb.conf Christian Couder
2018-03-19 13:31 ` Christian Couder [this message]
2018-03-19 13:31 ` [PATCH v2 26/36] pack-objects: don't pack objects in external odbs Christian Couder
2018-03-19 13:31 ` [PATCH v2 27/36] Add t0520 to test transfer to HTTP external odb Christian Couder
2018-03-19 13:31 ` [PATCH v2 28/36] odb-helper: add init_object_process() Christian Couder
2018-03-19 13:31 ` [PATCH v2 29/36] Add t0550 to test 'get_direct' mechanism Christian Couder
2018-03-19 13:31 ` [PATCH v2 30/36] Add t0560 to test passing git objects Christian Couder
2018-03-19 13:31 ` [PATCH v2 31/36] odb-helper: add put_object_process() Christian Couder
2018-03-19 13:31 ` [PATCH v2 32/36] Add t0570 to test passing raw objects Christian Couder
2018-03-19 13:31 ` [PATCH v2 33/36] odb-helper: add have_object_process() Christian Couder
2018-03-19 13:31 ` [PATCH v2 34/36] Add t0580 to test "have" capability and raw objects Christian Couder
2018-03-19 13:31 ` [PATCH v2 35/36] external-odb: use 'odb=magic' attribute to mark odb blobs Christian Couder
2018-03-19 13:31 ` [PATCH v2 36/36] Add Documentation/technical/external-odb.txt Christian Couder
2018-03-19 19:13 ` [PATCH v2 00/36] Promisor remotes and external ODB support Junio C Hamano
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