+#include <signal.h>
+#include <sys/wait.h>
+#include <sys/poll.h>
#include "cache.h"
#include "refs.h"
#include "pkt-line.h"
#include "object.h"
#include "commit.h"
#include "exec_cmd.h"
-#include <signal.h>
-#include <sys/poll.h>
-#include <sys/wait.h>
static const char upload_pack_usage[] = "git-upload-pack [--strict] [--timeout=nn] <dir>";
-#define THEY_HAVE (1U << 0)
-#define OUR_REF (1U << 1)
-#define WANTED (1U << 2)
-#define MAX_HAS 256
-#define MAX_NEEDS 256
-static int nr_has = 0, nr_needs = 0, multi_ack = 0, nr_our_refs = 0;
+/* bits #0..7 in revision.h, #8..10 in commit.c */
+#define THEY_HAVE (1u << 11)
+#define OUR_REF (1u << 12)
+#define WANTED (1u << 13)
+#define COMMON_KNOWN (1u << 14)
+#define REACHABLE (1u << 15)
+
+static unsigned long oldest_have = 0;
+
+static int multi_ack = 0, nr_our_refs = 0;
static int use_thin_pack = 0;
-static unsigned char has_sha1[MAX_HAS][20];
-static unsigned char needs_sha1[MAX_NEEDS][20];
+static struct object_array have_obj;
+static struct object_array want_obj;
static unsigned int timeout = 0;
+static int use_sideband = 0;
static void reset_timeout(void)
{
return len;
}
+#define PACKET_MAX 1000
+static ssize_t send_client_data(int fd, const char *data, ssize_t sz)
+{
+ ssize_t ssz;
+ const char *p;
+
+ if (!data) {
+ if (!use_sideband)
+ return 0;
+ packet_flush(1);
+ }
+
+ if (!use_sideband) {
+ if (fd == 3)
+ /* emergency quit */
+ fd = 2;
+ if (fd == 2) {
+ xwrite(fd, data, sz);
+ return sz;
+ }
+ return safe_write(fd, data, sz);
+ }
+ p = data;
+ ssz = sz;
+ while (sz) {
+ unsigned n;
+ char hdr[5];
+
+ n = sz;
+ if (PACKET_MAX - 5 < n)
+ n = PACKET_MAX - 5;
+ sprintf(hdr, "%04x", n + 5);
+ hdr[4] = fd;
+ safe_write(1, hdr, 5);
+ safe_write(1, p, n);
+ p += n;
+ sz -= n;
+ }
+ return ssz;
+}
+
static void create_pack_file(void)
{
- /* Pipes between rev-list to pack-objects and pack-objects to us. */
- int lp_pipe[2], pu_pipe[2];
+ /* Pipes between rev-list to pack-objects, pack-objects to us
+ * and pack-objects error stream for progress bar.
+ */
+ int lp_pipe[2], pu_pipe[2], pe_pipe[2];
pid_t pid_rev_list, pid_pack_objects;
- int create_full_pack = (nr_our_refs == nr_needs && !nr_has);
- char data[8193];
+ int create_full_pack = (nr_our_refs == want_obj.nr && !have_obj.nr);
+ char data[8193], progress[128];
+ char abort_msg[] = "aborting due to possible repository "
+ "corruption on the remote side.";
int buffered = -1;
if (pipe(lp_pipe) < 0)
int i;
int args;
const char **argv;
+ const char **p;
char *buf;
- char **p;
if (create_full_pack) {
args = 10;
use_thin_pack = 0; /* no point doing it */
}
else
- args = nr_has + nr_needs + 5;
+ args = have_obj.nr + want_obj.nr + 5;
p = xmalloc(args * sizeof(char *));
argv = (const char **) p;
buf = xmalloc(args * 45);
close(lp_pipe[1]);
*p++ = "rev-list";
*p++ = use_thin_pack ? "--objects-edge" : "--objects";
- if (create_full_pack || MAX_NEEDS <= nr_needs)
+ if (create_full_pack)
*p++ = "--all";
else {
- for (i = 0; i < nr_needs; i++) {
+ for (i = 0; i < want_obj.nr; i++) {
+ struct object *o = want_obj.objects[i].item;
*p++ = buf;
- memcpy(buf, sha1_to_hex(needs_sha1[i]), 41);
+ memcpy(buf, sha1_to_hex(o->sha1), 41);
buf += 41;
}
}
if (!create_full_pack)
- for (i = 0; i < nr_has; i++) {
+ for (i = 0; i < have_obj.nr; i++) {
+ struct object *o = have_obj.objects[i].item;
*p++ = buf;
*buf++ = '^';
- memcpy(buf, sha1_to_hex(has_sha1[i]), 41);
+ memcpy(buf, sha1_to_hex(o->sha1), 41);
buf += 41;
}
*p++ = NULL;
if (pipe(pu_pipe) < 0)
die("git-upload-pack: unable to create pipe");
+ if (pipe(pe_pipe) < 0)
+ die("git-upload-pack: unable to create pipe");
pid_pack_objects = fork();
if (pid_pack_objects < 0) {
/* daemon sets things up to ignore TERM */
if (!pid_pack_objects) {
dup2(lp_pipe[0], 0);
dup2(pu_pipe[1], 1);
+ dup2(pe_pipe[1], 2);
close(lp_pipe[0]);
close(lp_pipe[1]);
close(pu_pipe[0]);
close(pu_pipe[1]);
- execl_git_cmd("pack-objects", "--stdout", NULL);
+ close(pe_pipe[0]);
+ close(pe_pipe[1]);
+ execl_git_cmd("pack-objects", "--stdout", "--progress", NULL);
kill(pid_rev_list, SIGKILL);
die("git-upload-pack: unable to exec git-pack-objects");
}
close(lp_pipe[0]);
close(lp_pipe[1]);
- /* We read from pu_pipe[0] to capture the pack data.
+ /* We read from pe_pipe[0] to capture stderr output for
+ * progress bar, and pu_pipe[0] to capture the pack data.
*/
+ close(pe_pipe[1]);
close(pu_pipe[1]);
while (1) {
pid_t pid;
int status;
ssize_t sz;
- int pu, pollsize;
+ int pe, pu, pollsize;
+
+ reset_timeout();
pollsize = 0;
- pu = -1;
+ pe = pu = -1;
if (0 <= pu_pipe[0]) {
pfd[pollsize].fd = pu_pipe[0];
pu = pollsize;
pollsize++;
}
+ if (0 <= pe_pipe[0]) {
+ pfd[pollsize].fd = pe_pipe[0];
+ pfd[pollsize].events = POLLIN;
+ pe = pollsize;
+ pollsize++;
+ }
if (pollsize) {
if (poll(pfd, pollsize, -1) < 0) {
}
else
buffered = -1;
- sz = xwrite(1, data, sz);
+ sz = send_client_data(1, data, sz);
if (sz < 0)
goto fail;
}
+ if (0 <= pe && (pfd[pe].revents & (POLLIN|POLLHUP))) {
+ /* Status ready; we ship that in the side-band
+ * or dump to the standard error.
+ */
+ sz = read(pe_pipe[0], progress,
+ sizeof(progress));
+ if (0 < sz)
+ send_client_data(2, progress, sz);
+ else if (sz == 0) {
+ close(pe_pipe[0]);
+ pe_pipe[0] = -1;
+ }
+ else
+ goto fail;
+ }
}
/* See if the children are still there */
/* flush the data */
if (0 <= buffered) {
data[0] = buffered;
- sz = xwrite(1, data, 1);
+ sz = send_client_data(1, data, 1);
if (sz < 0)
goto fail;
fprintf(stderr, "flushed.\n");
}
+ send_client_data(1, NULL, 0);
return;
}
fail:
kill(pid_pack_objects, SIGKILL);
if (pid_rev_list)
kill(pid_rev_list, SIGKILL);
- die("git-upload-pack: aborting due to possible repository corruption on the remote side.");
+ send_client_data(3, abort_msg, sizeof(abort_msg));
+ die("git-upload-pack: %s", abort_msg);
}
static int got_sha1(char *hex, unsigned char *sha1)
{
+ struct object *o;
+ int we_knew_they_have = 0;
+
if (get_sha1_hex(hex, sha1))
die("git-upload-pack: expected SHA1 object, got '%s'", hex);
if (!has_sha1_file(sha1))
- return 0;
- if (nr_has < MAX_HAS) {
- struct object *o = lookup_object(sha1);
- if (!(o && o->parsed))
- o = parse_object(sha1);
- if (!o)
- die("oops (%s)", sha1_to_hex(sha1));
- if (o->type == TYPE_COMMIT) {
- struct commit_list *parents;
- if (o->flags & THEY_HAVE)
- return 0;
+ return -1;
+
+ o = lookup_object(sha1);
+ if (!(o && o->parsed))
+ o = parse_object(sha1);
+ if (!o)
+ die("oops (%s)", sha1_to_hex(sha1));
+ if (o->type == OBJ_COMMIT) {
+ struct commit_list *parents;
+ struct commit *commit = (struct commit *)o;
+ if (o->flags & THEY_HAVE)
+ we_knew_they_have = 1;
+ else
o->flags |= THEY_HAVE;
- for (parents = ((struct commit*)o)->parents;
- parents;
- parents = parents->next)
- parents->item->object.flags |= THEY_HAVE;
+ if (!oldest_have || (commit->date < oldest_have))
+ oldest_have = commit->date;
+ for (parents = commit->parents;
+ parents;
+ parents = parents->next)
+ parents->item->object.flags |= THEY_HAVE;
+ }
+ if (!we_knew_they_have) {
+ add_object_array(o, NULL, &have_obj);
+ return 1;
+ }
+ return 0;
+}
+
+static int reachable(struct commit *want)
+{
+ struct commit_list *work = NULL;
+
+ insert_by_date(want, &work);
+ while (work) {
+ struct commit_list *list = work->next;
+ struct commit *commit = work->item;
+ free(work);
+ work = list;
+
+ if (commit->object.flags & THEY_HAVE) {
+ want->object.flags |= COMMON_KNOWN;
+ break;
+ }
+ if (!commit->object.parsed)
+ parse_object(commit->object.sha1);
+ if (commit->object.flags & REACHABLE)
+ continue;
+ commit->object.flags |= REACHABLE;
+ if (commit->date < oldest_have)
+ continue;
+ for (list = commit->parents; list; list = list->next) {
+ struct commit *parent = list->item;
+ if (!(parent->object.flags & REACHABLE))
+ insert_by_date(parent, &work);
}
- memcpy(has_sha1[nr_has++], sha1, 20);
+ }
+ want->object.flags |= REACHABLE;
+ clear_commit_marks(want, REACHABLE);
+ free_commit_list(work);
+ return (want->object.flags & COMMON_KNOWN);
+}
+
+static int ok_to_give_up(void)
+{
+ int i;
+
+ if (!have_obj.nr)
+ return 0;
+
+ for (i = 0; i < want_obj.nr; i++) {
+ struct object *want = want_obj.objects[i].item;
+
+ if (want->flags & COMMON_KNOWN)
+ continue;
+ want = deref_tag(want, "a want line", 0);
+ if (!want || want->type != OBJ_COMMIT) {
+ /* no way to tell if this is reachable by
+ * looking at the ancestry chain alone, so
+ * leave a note to ourselves not to worry about
+ * this object anymore.
+ */
+ want_obj.objects[i].item->flags |= COMMON_KNOWN;
+ continue;
+ }
+ if (!reachable((struct commit *)want))
+ return 0;
}
return 1;
}
static int get_common_commits(void)
{
static char line[1000];
- unsigned char sha1[20], last_sha1[20];
+ unsigned char sha1[20];
+ char hex[41], last_hex[41];
int len;
track_object_refs = 0;
reset_timeout();
if (!len) {
- if (nr_has == 0 || multi_ack)
+ if (have_obj.nr == 0 || multi_ack)
packet_write(1, "NAK\n");
continue;
}
len = strip(line, len);
if (!strncmp(line, "have ", 5)) {
- if (got_sha1(line+5, sha1) &&
- (multi_ack || nr_has == 1)) {
- if (nr_has >= MAX_HAS)
- multi_ack = 0;
- packet_write(1, "ACK %s%s\n",
- sha1_to_hex(sha1),
- multi_ack ? " continue" : "");
- if (multi_ack)
- memcpy(last_sha1, sha1, 20);
+ switch (got_sha1(line+5, sha1)) {
+ case -1: /* they have what we do not */
+ if (multi_ack && ok_to_give_up())
+ packet_write(1, "ACK %s continue\n",
+ sha1_to_hex(sha1));
+ break;
+ default:
+ memcpy(hex, sha1_to_hex(sha1), 41);
+ if (multi_ack) {
+ const char *msg = "ACK %s continue\n";
+ packet_write(1, msg, hex);
+ memcpy(last_hex, hex, 41);
+ }
+ else if (have_obj.nr == 1)
+ packet_write(1, "ACK %s\n", hex);
+ break;
}
continue;
}
if (!strcmp(line, "done")) {
- if (nr_has > 0) {
+ if (have_obj.nr > 0) {
if (multi_ack)
- packet_write(1, "ACK %s\n",
- sha1_to_hex(last_sha1));
+ packet_write(1, "ACK %s\n", last_hex);
return 0;
}
packet_write(1, "NAK\n");
}
}
-static int receive_needs(void)
+static void receive_needs(void)
{
static char line[1000];
- int len, needs;
+ int len;
- needs = 0;
for (;;) {
struct object *o;
- unsigned char dummy[20], *sha1_buf;
+ unsigned char sha1_buf[20];
len = packet_read_line(0, line, sizeof(line));
reset_timeout();
if (!len)
- return needs;
-
- sha1_buf = dummy;
- if (needs == MAX_NEEDS) {
- fprintf(stderr,
- "warning: supporting only a max of %d requests. "
- "sending everything instead.\n",
- MAX_NEEDS);
- }
- else if (needs < MAX_NEEDS)
- sha1_buf = needs_sha1[needs];
+ return;
- if (strncmp("want ", line, 5) || get_sha1_hex(line+5, sha1_buf))
+ if (strncmp("want ", line, 5) ||
+ get_sha1_hex(line+5, sha1_buf))
die("git-upload-pack: protocol error, "
"expected to get sha, not '%s'", line);
if (strstr(line+45, "multi_ack"))
multi_ack = 1;
if (strstr(line+45, "thin-pack"))
use_thin_pack = 1;
+ if (strstr(line+45, "side-band"))
+ use_sideband = 1;
/* We have sent all our refs already, and the other end
* should have chosen out of them; otherwise they are
die("git-upload-pack: not our ref %s", line+5);
if (!(o->flags & WANTED)) {
o->flags |= WANTED;
- needs++;
+ add_object_array(o, NULL, &want_obj);
}
}
}
static int send_ref(const char *refname, const unsigned char *sha1)
{
- static char *capabilities = "multi_ack thin-pack";
+ static const char *capabilities = "multi_ack thin-pack side-band";
struct object *o = parse_object(sha1);
if (!o)
o->flags |= OUR_REF;
nr_our_refs++;
}
- if (o->type == TYPE_TAG) {
+ if (o->type == OBJ_TAG) {
o = deref_tag(o, refname, 0);
packet_write(1, "%s %s^{}\n", sha1_to_hex(o->sha1), refname);
}
head_ref(send_ref);
for_each_ref(send_ref);
packet_flush(1);
- nr_needs = receive_needs();
- if (!nr_needs)
+ receive_needs();
+ if (!want_obj.nr)
return 0;
get_common_commits();
create_pack_file();