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-rw-r--r--receive-pack.c98
1 files changed, 79 insertions, 19 deletions
diff --git a/receive-pack.c b/receive-pack.c
index ed08660..b8d1270 100644
--- a/receive-pack.c
+++ b/receive-pack.c
@@ -1,4 +1,5 @@
#include "cache.h"
+#include "pack.h"
#include "refs.h"
#include "pkt-line.h"
#include "run-command.h"
@@ -7,9 +8,8 @@
static const char receive_pack_usage[] = "git-receive-pack <git-dir>";
-static const char *unpacker[] = { "unpack-objects", NULL };
-
static int deny_non_fast_forwards = 0;
+static int unpack_limit = 5000;
static int report_status;
static char capabilities[] = "report-status";
@@ -25,6 +25,12 @@ static int receive_pack_config(const char *var, const char *value)
return 0;
}
+ if (strcmp(var, "receive.unpacklimit") == 0)
+ {
+ unpack_limit = git_config_int(var, value);
+ return 0;
+ }
+
return 0;
}
@@ -227,27 +233,81 @@ static void read_head_info(void)
}
}
+static const char *parse_pack_header(struct pack_header *hdr)
+{
+ char *c = (char*)hdr;
+ ssize_t remaining = sizeof(struct pack_header);
+ do {
+ ssize_t r = xread(0, c, remaining);
+ if (r <= 0)
+ return "eof before pack header was fully read";
+ remaining -= r;
+ c += r;
+ } while (remaining > 0);
+ if (hdr->hdr_signature != htonl(PACK_SIGNATURE))
+ return "protocol error (pack signature mismatch detected)";
+ if (!pack_version_ok(hdr->hdr_version))
+ return "protocol error (pack version unsupported)";
+ return NULL;
+}
+
static const char *unpack(void)
{
- int code = run_command_v_opt(1, unpacker, RUN_GIT_CMD);
+ struct pack_header hdr;
+ const char *hdr_err;
+ char hdr_arg[38];
+ int code;
+
+ hdr_err = parse_pack_header(&hdr);
+ if (hdr_err)
+ return hdr_err;
+ snprintf(hdr_arg, sizeof(hdr_arg), "--pack_header=%u,%u",
+ ntohl(hdr.hdr_version), ntohl(hdr.hdr_entries));
+
+ if (ntohl(hdr.hdr_entries) < unpack_limit) {
+ const char *unpacker[3];
+ unpacker[0] = "unpack-objects";
+ unpacker[1] = hdr_arg;
+ unpacker[2] = NULL;
+ code = run_command_v_opt(1, unpacker, RUN_GIT_CMD);
+ } else {
+ const char *keeper[6];
+ char my_host[255], keep_arg[128 + 255];
+
+ if (gethostname(my_host, sizeof(my_host)))
+ strcpy(my_host, "localhost");
+ snprintf(keep_arg, sizeof(keep_arg),
+ "--keep=receive-pack %i on %s",
+ getpid(), my_host);
+
+ keeper[0] = "index-pack";
+ keeper[1] = "--stdin";
+ keeper[2] = "--fix-thin";
+ keeper[3] = hdr_arg;
+ keeper[4] = keep_arg;
+ keeper[5] = NULL;
+ code = run_command_v_opt(1, keeper, RUN_GIT_CMD);
+ if (!code)
+ reprepare_packed_git();
+ }
switch (code) {
- case 0:
- return NULL;
- case -ERR_RUN_COMMAND_FORK:
- return "unpack fork failed";
- case -ERR_RUN_COMMAND_EXEC:
- return "unpack execute failed";
- case -ERR_RUN_COMMAND_WAITPID:
- return "waitpid failed";
- case -ERR_RUN_COMMAND_WAITPID_WRONG_PID:
- return "waitpid is confused";
- case -ERR_RUN_COMMAND_WAITPID_SIGNAL:
- return "unpacker died of signal";
- case -ERR_RUN_COMMAND_WAITPID_NOEXIT:
- return "unpacker died strangely";
- default:
- return "unpacker exited with error code";
+ case 0:
+ return NULL;
+ case -ERR_RUN_COMMAND_FORK:
+ return "unpack fork failed";
+ case -ERR_RUN_COMMAND_EXEC:
+ return "unpack execute failed";
+ case -ERR_RUN_COMMAND_WAITPID:
+ return "waitpid failed";
+ case -ERR_RUN_COMMAND_WAITPID_WRONG_PID:
+ return "waitpid is confused";
+ case -ERR_RUN_COMMAND_WAITPID_SIGNAL:
+ return "unpacker died of signal";
+ case -ERR_RUN_COMMAND_WAITPID_NOEXIT:
+ return "unpacker died strangely";
+ default:
+ return "unpacker exited with error code";
}
}