X-Git-Url: https://git.tokkee.org/?a=blobdiff_plain;f=upload-pack.c;h=c568ef066c9e7e0021468cfe7cb904f40ac477f1;hb=60c0f8462fefed22fc8fb9c4e529665ed8204536;hp=94aa0dab4866f86f197dc84956db5e19601a603a;hpb=1733832d8ec11655924af58efb67ff4503928b59;p=git.git diff --git a/upload-pack.c b/upload-pack.c index 94aa0dab4..c568ef066 100644 --- a/upload-pack.c +++ b/upload-pack.c @@ -1,27 +1,39 @@ -#include -#include -#include #include "cache.h" #include "refs.h" #include "pkt-line.h" +#include "sideband.h" #include "tag.h" #include "object.h" #include "commit.h" #include "exec_cmd.h" +#include "diff.h" +#include "revision.h" +#include "list-objects.h" static const char upload_pack_usage[] = "git-upload-pack [--strict] [--timeout=nn] "; -#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; -static int use_thin_pack = 0; -static unsigned char has_sha1[MAX_HAS][20]; -static unsigned char needs_sha1[MAX_NEEDS][20]; -static unsigned int timeout = 0; -static int use_sideband = 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) + +#define SHALLOW (1u << 16) +#define NOT_SHALLOW (1u << 17) +#define CLIENT_SHALLOW (1u << 18) + +static unsigned long oldest_have; + +static int multi_ack, nr_our_refs; +static int use_thin_pack, use_ofs_delta; +static struct object_array have_obj; +static struct object_array want_obj; +static unsigned int timeout; +/* 0 for no sideband, + * otherwise maximum packet size (up to 65520 bytes). + */ +static int use_sideband; static void reset_timeout(void) { @@ -35,45 +47,52 @@ static int strip(char *line, int len) 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) + return send_sideband(1, fd, data, sz, use_sideband); + if (fd == 3) + /* emergency quit */ + fd = 2; + if (fd == 2) { + xwrite(fd, data, sz); + return sz; } + return safe_write(fd, data, sz); +} - 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; +FILE *pack_pipe = NULL; +static void show_commit(struct commit *commit) +{ + if (commit->object.flags & BOUNDARY) + fputc('-', pack_pipe); + if (fputs(sha1_to_hex(commit->object.sha1), pack_pipe) < 0) + die("broken output pipe"); + fputc('\n', pack_pipe); + fflush(pack_pipe); + free(commit->buffer); + commit->buffer = NULL; +} + +static void show_object(struct object_array_entry *p) +{ + /* An object with name "foo\n0000000..." can be used to + * confuse downstream git-pack-objects very badly. + */ + const char *ep = strchr(p->name, '\n'); + if (ep) { + fprintf(pack_pipe, "%s %.*s\n", sha1_to_hex(p->item->sha1), + (int) (ep - p->name), + p->name); } - return ssz; + else + fprintf(pack_pipe, "%s %s\n", + sha1_to_hex(p->item->sha1), p->name); +} + +static void show_edge(struct commit *commit) +{ + fprintf(pack_pipe, "-%s\n", sha1_to_hex(commit->object.sha1)); } static void create_pack_file(void) @@ -83,7 +102,7 @@ static void create_pack_file(void) */ 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); + 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."; @@ -97,46 +116,40 @@ static void create_pack_file(void) if (!pid_rev_list) { int i; - int args; - const char **argv; - const char **p; - char *buf; + struct rev_info revs; - if (create_full_pack) { - args = 10; + pack_pipe = fdopen(lp_pipe[1], "w"); + + if (create_full_pack) use_thin_pack = 0; /* no point doing it */ - } - else - args = nr_has + nr_needs + 5; - p = xmalloc(args * sizeof(char *)); - argv = (const char **) p; - buf = xmalloc(args * 45); + init_revisions(&revs, NULL); + revs.tag_objects = 1; + revs.tree_objects = 1; + revs.blob_objects = 1; + if (use_thin_pack) + revs.edge_hint = 1; - dup2(lp_pipe[1], 1); - close(0); - close(lp_pipe[0]); - close(lp_pipe[1]); - *p++ = "rev-list"; - *p++ = use_thin_pack ? "--objects-edge" : "--objects"; - if (create_full_pack || MAX_NEEDS <= nr_needs) - *p++ = "--all"; - else { - for (i = 0; i < nr_needs; i++) { - *p++ = buf; - memcpy(buf, sha1_to_hex(needs_sha1[i]), 41); - buf += 41; + if (create_full_pack) { + const char *args[] = {"rev-list", "--all", NULL}; + setup_revisions(2, args, &revs, NULL); + } else { + for (i = 0; i < want_obj.nr; i++) { + struct object *o = want_obj.objects[i].item; + /* why??? */ + o->flags &= ~UNINTERESTING; + add_pending_object(&revs, o, NULL); } - } - if (!create_full_pack) - for (i = 0; i < nr_has; i++) { - *p++ = buf; - *buf++ = '^'; - memcpy(buf, sha1_to_hex(has_sha1[i]), 41); - buf += 41; + for (i = 0; i < have_obj.nr; i++) { + struct object *o = have_obj.objects[i].item; + o->flags |= UNINTERESTING; + add_pending_object(&revs, o, NULL); } - *p++ = NULL; - execv_git_cmd(argv); - die("git-upload-pack: unable to exec git-rev-list"); + setup_revisions(0, NULL, &revs, NULL); + } + prepare_revision_walk(&revs); + mark_edges_uninteresting(revs.commits, &revs, show_edge); + traverse_commit_list(&revs, show_commit, show_object); + exit(0); } if (pipe(pu_pipe) < 0) @@ -160,7 +173,9 @@ static void create_pack_file(void) close(pu_pipe[1]); close(pe_pipe[0]); close(pe_pipe[1]); - execl_git_cmd("pack-objects", "--stdout", "--progress", NULL); + execl_git_cmd("pack-objects", "--stdout", "--progress", + use_ofs_delta ? "--delta-base-offset" : NULL, + NULL); kill(pid_rev_list, SIGKILL); die("git-upload-pack: unable to exec git-pack-objects"); } @@ -182,6 +197,8 @@ static void create_pack_file(void) ssize_t sz; int pe, pu, pollsize; + reset_timeout(); + pollsize = 0; pe = pu = -1; @@ -306,7 +323,8 @@ static void create_pack_file(void) goto fail; fprintf(stderr, "flushed.\n"); } - send_client_data(1, NULL, 0); + if (use_sideband) + packet_flush(1); return; } fail: @@ -320,27 +338,98 @@ static void create_pack_file(void) 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; } @@ -348,7 +437,8 @@ static int got_sha1(char *hex, unsigned char *sha1) 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; @@ -359,29 +449,35 @@ static int get_common_commits(void) 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"); @@ -391,39 +487,55 @@ static int get_common_commits(void) } } -static int receive_needs(void) +static void receive_needs(void) { + struct object_array shallows = {0, 0, NULL}; static char line[1000]; - int len, needs; + int len, depth = 0; - 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]; + break; - if (strncmp("want ", line, 5) || get_sha1_hex(line+5, sha1_buf)) + if (!strncmp("shallow ", line, 8)) { + unsigned char sha1[20]; + struct object *object; + use_thin_pack = 0; + if (get_sha1(line + 8, sha1)) + die("invalid shallow line: %s", line); + object = parse_object(sha1); + if (!object) + die("did not find object for %s", line); + object->flags |= CLIENT_SHALLOW; + add_object_array(object, NULL, &shallows); + continue; + } + if (!strncmp("deepen ", line, 7)) { + char *end; + use_thin_pack = 0; + depth = strtol(line + 7, &end, 0); + if (end == line + 7 || depth <= 0) + die("Invalid deepen: %s", line); + continue; + } + 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; + if (strstr(line+45, "ofs-delta")) + use_ofs_delta = 1; + if (strstr(line+45, "side-band-64k")) + use_sideband = LARGE_PACKET_MAX; + else if (strstr(line+45, "side-band")) + use_sideband = DEFAULT_PACKET_MAX; /* We have sent all our refs already, and the other end * should have chosen out of them; otherwise they are @@ -438,14 +550,61 @@ static int receive_needs(void) 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); } } + if (depth == 0 && shallows.nr == 0) + return; + if (depth > 0) { + struct commit_list *result, *backup; + int i; + backup = result = get_shallow_commits(&want_obj, depth, + SHALLOW, NOT_SHALLOW); + while (result) { + struct object *object = &result->item->object; + if (!(object->flags & (CLIENT_SHALLOW|NOT_SHALLOW))) { + packet_write(1, "shallow %s", + sha1_to_hex(object->sha1)); + register_shallow(object->sha1); + } + result = result->next; + } + free_commit_list(backup); + for (i = 0; i < shallows.nr; i++) { + struct object *object = shallows.objects[i].item; + if (object->flags & NOT_SHALLOW) { + struct commit_list *parents; + packet_write(1, "unshallow %s", + sha1_to_hex(object->sha1)); + object->flags &= ~CLIENT_SHALLOW; + /* make sure the real parents are parsed */ + unregister_shallow(object->sha1); + object->parsed = 0; + parse_commit((struct commit *)object); + parents = ((struct commit *)object)->parents; + while (parents) { + add_object_array(&parents->item->object, + NULL, &want_obj); + parents = parents->next; + } + } + /* make sure commit traversal conforms to client */ + register_shallow(object->sha1); + } + packet_flush(1); + } else + if (shallows.nr > 0) { + int i; + for (i = 0; i < shallows.nr; i++) + register_shallow(shallows.objects[i].item->sha1); + } + free(shallows.objects); } -static int send_ref(const char *refname, const unsigned char *sha1) +static int send_ref(const char *refname, const unsigned char *sha1, int flag, void *cb_data) { - static const char *capabilities = "multi_ack thin-pack side-band"; + static const char *capabilities = "multi_ack thin-pack side-band" + " side-band-64k ofs-delta shallow"; struct object *o = parse_object(sha1); if (!o) @@ -461,25 +620,24 @@ static int send_ref(const char *refname, const unsigned char *sha1) 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); } return 0; } -static int upload_pack(void) +static void upload_pack(void) { reset_timeout(); - head_ref(send_ref); - for_each_ref(send_ref); + head_ref(send_ref, NULL); + for_each_ref(send_ref, NULL); packet_flush(1); - nr_needs = receive_needs(); - if (!nr_needs) - return 0; - get_common_commits(); - create_pack_file(); - return 0; + receive_needs(); + if (want_obj.nr) { + get_common_commits(); + create_pack_file(); + } } int main(int argc, char **argv)