/*
* Copyright (c) 2020 Stefan Sperling <stsp@openbsd.org>
*
* Permission to use, copy, modify, and distribute this software for any
* purpose with or without fee is hereby granted, provided that the above
* copyright notice and this permission notice appear in all copies.
*
* THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
* WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
* MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
* ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
* WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
* ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
* OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
*/
#include <sys/types.h>
#include <sys/queue.h>
#include <sys/uio.h>
#include <sys/stat.h>
#include <sys/socket.h>
#include <sys/wait.h>
#include <dirent.h>
#include <endian.h>
#include <errno.h>
#include <fcntl.h>
#include <stdint.h>
#include <sha1.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <limits.h>
#include <unistd.h>
#include <imsg.h>
#include "got_error.h"
#include "got_cancel.h"
#include "got_object.h"
#include "got_reference.h"
#include "got_repository.h"
#include "got_repository_admin.h"
#include "got_opentemp.h"
#include "got_path.h"
#include "got_lib_delta.h"
#include "got_lib_object.h"
#include "got_lib_object_idset.h"
#include "got_lib_object_cache.h"
#include "got_lib_pack.h"
#include "got_lib_privsep.h"
#include "got_lib_repository.h"
#include "got_lib_pack_create.h"
#include "got_lib_sha1.h"
#include "got_lib_lockfile.h"
#ifndef nitems
#define nitems(_a) (sizeof((_a)) / sizeof((_a)[0]))
#endif
static const struct got_error *
get_reflist_object_ids(struct got_object_id ***ids, int *nobjects,
unsigned int wanted_obj_type_mask, struct got_reflist_head *refs,
struct got_repository *repo,
got_cancel_cb cancel_cb, void *cancel_arg)
{
const struct got_error *err = NULL;
const size_t alloc_chunksz = 256;
size_t nalloc;
struct got_reflist_entry *re;
int i;
*ids = NULL;
*nobjects = 0;
*ids = reallocarray(NULL, alloc_chunksz, sizeof(struct got_object_id *));
if (*ids == NULL)
return got_error_from_errno("reallocarray");
nalloc = alloc_chunksz;
TAILQ_FOREACH(re, refs, entry) {
struct got_object_id *id;
if (cancel_cb) {
err = cancel_cb(cancel_arg);
if (err)
goto done;
}
err = got_ref_resolve(&id, repo, re->ref);
if (err)
goto done;
if (wanted_obj_type_mask != GOT_OBJ_TYPE_ANY) {
int obj_type;
err = got_object_get_type(&obj_type, repo, id);
if (err)
goto done;
if ((wanted_obj_type_mask & (1 << obj_type)) == 0) {
free(id);
id = NULL;
continue;
}
}
if (nalloc <= *nobjects) {
struct got_object_id **new;
new = recallocarray(*ids, nalloc,
nalloc + alloc_chunksz,
sizeof(struct got_object_id *));
if (new == NULL) {
err = got_error_from_errno(
"recallocarray");
goto done;
}
*ids = new;
nalloc += alloc_chunksz;
}
(*ids)[*nobjects] = id;
if ((*ids)[*nobjects] == NULL) {
err = got_error_from_errno("got_object_id_dup");
goto done;
}
(*nobjects)++;
}
done:
if (err) {
for (i = 0; i < *nobjects; i++)
free((*ids)[i]);
free(*ids);
*ids = NULL;
*nobjects = 0;
}
return err;
}
const struct got_error *
got_repo_pack_objects(FILE **packfile, struct got_object_id **pack_hash,
struct got_reflist_head *include_refs,
struct got_reflist_head *exclude_refs, struct got_repository *repo,
int loose_obj_only, got_pack_progress_cb progress_cb, void *progress_arg,
got_cancel_cb cancel_cb, void *cancel_arg)
{
const struct got_error *err = NULL;
struct got_object_id **ours = NULL, **theirs = NULL;
int nours = 0, ntheirs = 0, packfd = -1, i;
char *tmpfile_path = NULL, *path = NULL, *packfile_path = NULL;
char *sha1_str = NULL;
*packfile = NULL;
*pack_hash = NULL;
if (asprintf(&path, "%s/%s/packing.pack",
got_repo_get_path_git_dir(repo), GOT_OBJECTS_PACK_DIR) == -1) {
err = got_error_from_errno("asprintf");
goto done;
}
err = got_opentemp_named_fd(&tmpfile_path, &packfd, path);
if (err)
goto done;
if (fchmod(packfd, GOT_DEFAULT_FILE_MODE) != 0) {
err = got_error_from_errno2("fchmod", tmpfile_path);
goto done;
}
*packfile = fdopen(packfd, "w");
if (*packfile == NULL) {
err = got_error_from_errno2("fdopen", tmpfile_path);
goto done;
}
packfd = -1;
err = get_reflist_object_ids(&ours, &nours,
(1 << GOT_OBJ_TYPE_COMMIT) | (1 << GOT_OBJ_TYPE_TAG),
include_refs, repo, cancel_cb, cancel_arg);
if (err)
goto done;
if (nours == 0) {
err = got_error(GOT_ERR_CANNOT_PACK);
goto done;
}
if (!TAILQ_EMPTY(exclude_refs)) {
err = get_reflist_object_ids(&theirs, &ntheirs,
(1 << GOT_OBJ_TYPE_COMMIT) | (1 << GOT_OBJ_TYPE_TAG),
exclude_refs, repo,
cancel_cb, cancel_arg);
if (err)
goto done;
}
*pack_hash = calloc(1, sizeof(**pack_hash));
if (*pack_hash == NULL) {
err = got_error_from_errno("calloc");
goto done;
}
err = got_pack_create((*pack_hash)->sha1, *packfile, theirs, ntheirs,
ours, nours, repo, loose_obj_only, 0, progress_cb, progress_arg,
cancel_cb, cancel_arg);
if (err)
goto done;
err = got_object_id_str(&sha1_str, *pack_hash);
if (err)
goto done;
if (asprintf(&packfile_path, "%s/%s/pack-%s.pack",
got_repo_get_path_git_dir(repo), GOT_OBJECTS_PACK_DIR,
sha1_str) == -1) {
err = got_error_from_errno("asprintf");
goto done;
}
if (fflush(*packfile) == -1) {
err = got_error_from_errno("fflush");
goto done;
}
if (fseek(*packfile, 0L, SEEK_SET) == -1) {
err = got_error_from_errno("fseek");
goto done;
}
if (rename(tmpfile_path, packfile_path) == -1) {
err = got_error_from_errno3("rename", tmpfile_path,
packfile_path);
goto done;
}
free(tmpfile_path);
tmpfile_path = NULL;
done:
for (i = 0; i < nours; i++)
free(ours[i]);
free(ours);
for (i = 0; i < ntheirs; i++)
free(theirs[i]);
free(theirs);
if (packfd != -1 && close(packfd) == -1 && err == NULL)
err = got_error_from_errno2("close", packfile_path);
if (tmpfile_path && unlink(tmpfile_path) == -1 && err == NULL)
err = got_error_from_errno2("unlink", tmpfile_path);
free(tmpfile_path);
free(packfile_path);
free(sha1_str);
free(path);
if (err) {
free(*pack_hash);
*pack_hash = NULL;
if (*packfile)
fclose(*packfile);
*packfile = NULL;
}
return err;
}
const struct got_error *
got_repo_index_pack(FILE *packfile, struct got_object_id *pack_hash,
struct got_repository *repo,
got_pack_index_progress_cb progress_cb, void *progress_arg,
got_cancel_cb cancel_cb, void *cancel_arg)
{
size_t i;
char *path;
int imsg_idxfds[2];
int npackfd = -1, idxfd = -1, nidxfd = -1;
int tmpfds[3];
int idxstatus, done = 0;
const struct got_error *err;
struct imsgbuf idxibuf;
pid_t idxpid;
char *tmpidxpath = NULL;
char *packfile_path = NULL, *idxpath = NULL, *id_str = NULL;
const char *repo_path = got_repo_get_path_git_dir(repo);
struct stat sb;
for (i = 0; i < nitems(tmpfds); i++)
tmpfds[i] = -1;
if (asprintf(&path, "%s/%s/indexing.idx",
repo_path, GOT_OBJECTS_PACK_DIR) == -1) {
err = got_error_from_errno("asprintf");
goto done;
}
err = got_opentemp_named_fd(&tmpidxpath, &idxfd, path);
free(path);
if (err)
goto done;
if (fchmod(idxfd, GOT_DEFAULT_FILE_MODE) != 0) {
err = got_error_from_errno2("fchmod", tmpidxpath);
goto done;
}
nidxfd = dup(idxfd);
if (nidxfd == -1) {
err = got_error_from_errno("dup");
goto done;
}
for (i = 0; i < nitems(tmpfds); i++) {
tmpfds[i] = got_opentempfd();
if (tmpfds[i] == -1) {
err = got_error_from_errno("got_opentempfd");
goto done;
}
}
err = got_object_id_str(&id_str, pack_hash);
if (err)
goto done;
if (asprintf(&packfile_path, "%s/%s/pack-%s.pack",
repo_path, GOT_OBJECTS_PACK_DIR, id_str) == -1) {
err = got_error_from_errno("asprintf");
goto done;
}
if (fstat(fileno(packfile), &sb) == -1) {
err = got_error_from_errno2("fstat", packfile_path);
goto done;
}
if (asprintf(&idxpath, "%s/%s/pack-%s.idx",
repo_path, GOT_OBJECTS_PACK_DIR, id_str) == -1) {
err = got_error_from_errno("asprintf");
goto done;
}
if (socketpair(AF_UNIX, SOCK_STREAM, PF_UNSPEC, imsg_idxfds) == -1) {
err = got_error_from_errno("socketpair");
goto done;
}
idxpid = fork();
if (idxpid == -1) {
err= got_error_from_errno("fork");
goto done;
} else if (idxpid == 0)
got_privsep_exec_child(imsg_idxfds,
GOT_PATH_PROG_INDEX_PACK, packfile_path);
if (close(imsg_idxfds[1]) == -1) {
err = got_error_from_errno("close");
goto done;
}
imsg_init(&idxibuf, imsg_idxfds[0]);
npackfd = dup(fileno(packfile));
if (npackfd == -1) {
err = got_error_from_errno("dup");
goto done;
}
err = got_privsep_send_index_pack_req(&idxibuf, pack_hash->sha1,
npackfd);
if (err != NULL)
goto done;
npackfd = -1;
err = got_privsep_send_index_pack_outfd(&idxibuf, nidxfd);
if (err != NULL)
goto done;
nidxfd = -1;
for (i = 0; i < nitems(tmpfds); i++) {
err = got_privsep_send_tmpfd(&idxibuf, tmpfds[i]);
if (err != NULL)
goto done;
tmpfds[i] = -1;
}
done = 0;
while (!done) {
int nobj_total, nobj_indexed, nobj_loose, nobj_resolved;
if (cancel_cb) {
err = cancel_cb(cancel_arg);
if (err)
goto done;
}
err = got_privsep_recv_index_progress(&done, &nobj_total,
&nobj_indexed, &nobj_loose, &nobj_resolved,
&idxibuf);
if (err != NULL)
goto done;
if (nobj_indexed != 0) {
err = progress_cb(progress_arg, sb.st_size,
nobj_total, nobj_indexed, nobj_loose,
nobj_resolved);
if (err)
break;
}
imsg_clear(&idxibuf);
}
if (close(imsg_idxfds[0]) == -1) {
err = got_error_from_errno("close");
goto done;
}
if (waitpid(idxpid, &idxstatus, 0) == -1) {
err = got_error_from_errno("waitpid");
goto done;
}
if (rename(tmpidxpath, idxpath) == -1) {
err = got_error_from_errno3("rename", tmpidxpath, idxpath);
goto done;
}
free(tmpidxpath);
tmpidxpath = NULL;
done:
if (tmpidxpath && unlink(tmpidxpath) == -1 && err == NULL)
err = got_error_from_errno2("unlink", tmpidxpath);
if (npackfd != -1 && close(npackfd) == -1 && err == NULL)
err = got_error_from_errno("close");
if (idxfd != -1 && close(idxfd) == -1 && err == NULL)
err = got_error_from_errno("close");
for (i = 0; i < nitems(tmpfds); i++) {
if (tmpfds[i] != -1 && close(tmpfds[i]) == -1 && err == NULL)
err = got_error_from_errno("close");
}
free(tmpidxpath);
free(idxpath);
free(packfile_path);
return err;
}
const struct got_error *
got_repo_find_pack(FILE **packfile, struct got_object_id **pack_hash,
struct got_repository *repo, const char *packfile_path)
{
const struct got_error *err = NULL;
const char *packdir_path = NULL;
char *packfile_name = NULL, *p, *dot;
struct got_object_id id;
int packfd = -1;
*packfile = NULL;
*pack_hash = NULL;
packdir_path = got_repo_get_path_objects_pack(repo);
if (packdir_path == NULL)
return got_error_from_errno("got_repo_get_path_objects_pack");
if (!got_path_is_child(packfile_path, packdir_path,
strlen(packdir_path))) {
err = got_error_path(packfile_path, GOT_ERR_BAD_PATH);
goto done;
}
err = got_path_basename(&packfile_name, packfile_path);
if (err)
goto done;
p = packfile_name;
if (strncmp(p, "pack-", 5) != 0) {
err = got_error_fmt(GOT_ERR_BAD_PATH,
"'%s' is not a valid pack file name",
packfile_name);
goto done;
}
p += 5;
dot = strchr(p, '.');
if (dot == NULL) {
err = got_error_fmt(GOT_ERR_BAD_PATH,
"'%s' is not a valid pack file name",
packfile_name);
goto done;
}
if (strcmp(dot + 1, "pack") != 0) {
err = got_error_fmt(GOT_ERR_BAD_PATH,
"'%s' is not a valid pack file name",
packfile_name);
goto done;
}
*dot = '\0';
if (!got_parse_sha1_digest(id.sha1, p)) {
err = got_error_fmt(GOT_ERR_BAD_PATH,
"'%s' is not a valid pack file name",
packfile_name);
goto done;
}
*pack_hash = got_object_id_dup(&id);
if (*pack_hash == NULL) {
err = got_error_from_errno("got_object_id_dup");
goto done;
}
packfd = open(packfile_path, O_RDONLY | O_NOFOLLOW);
if (packfd == -1) {
err = got_error_from_errno2("open", packfile_path);
goto done;
}
*packfile = fdopen(packfd, "r");
if (*packfile == NULL) {
err = got_error_from_errno2("fdopen", packfile_path);
goto done;
}
packfd = -1;
done:
if (packfd != -1 && close(packfd) == -1 && err == NULL)
err = got_error_from_errno2("close", packfile_path);
free(packfile_name);
if (err) {
free(*pack_hash);
*pack_hash = NULL;
}
return err;
}
const struct got_error *
got_repo_list_pack(FILE *packfile, struct got_object_id *pack_hash,
struct got_repository *repo, got_pack_list_cb list_cb, void *list_arg,
got_cancel_cb cancel_cb, void *cancel_arg)
{
const struct got_error *err = NULL;
char *id_str = NULL, *idxpath = NULL, *packpath = NULL;
struct got_packidx *packidx = NULL;
struct got_pack *pack = NULL;
uint32_t nobj, i;
err = got_object_id_str(&id_str, pack_hash);
if (err)
goto done;
if (asprintf(&packpath, "%s/pack-%s.pack",
GOT_OBJECTS_PACK_DIR, id_str) == -1) {
err = got_error_from_errno("asprintf");
goto done;
}
if (asprintf(&idxpath, "%s/pack-%s.idx",
GOT_OBJECTS_PACK_DIR, id_str) == -1) {
err = got_error_from_errno("asprintf");
goto done;
}
err = got_packidx_open(&packidx, got_repo_get_fd(repo), idxpath, 1);
if (err)
goto done;
err = got_repo_cache_pack(&pack, repo, packpath, packidx);
if (err)
goto done;
nobj = be32toh(packidx->hdr.fanout_table[0xff]);
for (i = 0; i < nobj; i++) {
struct got_packidx_object_id *oid;
struct got_object_id id, base_id;
off_t offset, base_offset = 0;
uint8_t type;
uint64_t size;
size_t tslen, len;
if (cancel_cb) {
err = cancel_cb(cancel_arg);
if (err)
break;
}
oid = &packidx->hdr.sorted_ids[i];
memcpy(id.sha1, oid->sha1, SHA1_DIGEST_LENGTH);
offset = got_packidx_get_object_offset(packidx, i);
if (offset == -1) {
err = got_error(GOT_ERR_BAD_PACKIDX);
goto done;
}
err = got_pack_parse_object_type_and_size(&type, &size, &tslen,
pack, offset);
if (err)
goto done;
switch (type) {
case GOT_OBJ_TYPE_OFFSET_DELTA:
err = got_pack_parse_offset_delta(&base_offset, &len,
pack, offset, tslen);
if (err)
goto done;
break;
case GOT_OBJ_TYPE_REF_DELTA:
err = got_pack_parse_ref_delta(&base_id,
pack, offset, tslen);
if (err)
goto done;
break;
}
err = (*list_cb)(list_arg, &id, type, offset, size,
base_offset, &base_id);
if (err)
goto done;
}
done:
free(id_str);
free(idxpath);
free(packpath);
if (packidx)
got_packidx_close(packidx);
return err;
}
static const struct got_error *
get_loose_object_ids(struct got_object_idset **loose_ids, off_t *ondisk_size,
got_cleanup_progress_cb progress_cb, void *progress_arg,
struct got_repository *repo)
{
const struct got_error *err = NULL;
char *path_objects = NULL, *path = NULL;
DIR *dir = NULL;
struct got_object *obj = NULL;
struct got_object_id id;
int i, fd = -1;
struct stat sb;
*ondisk_size = 0;
*loose_ids = got_object_idset_alloc();
if (*loose_ids == NULL)
return got_error_from_errno("got_object_idset_alloc");
path_objects = got_repo_get_path_objects(repo);
if (path_objects == NULL) {
err = got_error_from_errno("got_repo_get_path_objects");
goto done;
}
for (i = 0; i <= 0xff; i++) {
struct dirent *dent;
if (asprintf(&path, "%s/%.2x", path_objects, i) == -1) {
err = got_error_from_errno("asprintf");
break;
}
dir = opendir(path);
if (dir == NULL) {
if (errno == ENOENT) {
err = NULL;
continue;
}
err = got_error_from_errno2("opendir", path);
break;
}
while ((dent = readdir(dir)) != NULL) {
char *id_str;
if (strcmp(dent->d_name, ".") == 0 ||
strcmp(dent->d_name, "..") == 0)
continue;
if (asprintf(&id_str, "%.2x%s", i, dent->d_name) == -1) {
err = got_error_from_errno("asprintf");
goto done;
}
memset(&id, 0, sizeof(id));
if (!got_parse_sha1_digest(id.sha1, id_str)) {
free(id_str);
continue;
}
free(id_str);
err = got_object_open_loose_fd(&fd, &id, repo);
if (err)
goto done;
if (fstat(fd, &sb) == -1) {
err = got_error_from_errno("fstat");
goto done;
}
err = got_object_read_header_privsep(&obj, &id, repo,
fd);
if (err)
goto done;
fd = -1; /* already closed */
switch (obj->type) {
case GOT_OBJ_TYPE_COMMIT:
case GOT_OBJ_TYPE_TREE:
case GOT_OBJ_TYPE_BLOB:
case GOT_OBJ_TYPE_TAG:
break;
default:
err = got_error_fmt(GOT_ERR_OBJ_TYPE,
"%d", obj->type);
goto done;
}
got_object_close(obj);
obj = NULL;
(*ondisk_size) += sb.st_size;
err = got_object_idset_add(*loose_ids, &id, NULL);
if (err)
goto done;
if (progress_cb) {
err = progress_cb(progress_arg,
got_object_idset_num_elements(*loose_ids),
-1, -1);
if (err)
goto done;
}
}
if (closedir(dir) != 0) {
err = got_error_from_errno("closedir");
goto done;
}
dir = NULL;
free(path);
path = NULL;
}
done:
if (dir && closedir(dir) != 0 && err == NULL)
err = got_error_from_errno("closedir");
if (fd != -1 && close(fd) == -1 && err == NULL)
err = got_error_from_errno("close");
if (err) {
got_object_idset_free(*loose_ids);
*loose_ids = NULL;
}
if (obj)
got_object_close(obj);
free(path_objects);
free(path);
return err;
}
static const struct got_error *
preserve_loose_object(struct got_object_idset *loose_ids,
struct got_object_id *id, struct got_repository *repo, int *npacked)
{
const struct got_error *err = NULL;
struct got_object *obj;
if (!got_object_idset_contains(loose_ids, id))
return NULL;
/*
* Try to open this object from a pack file. This ensures that
* we do in fact have a valid packed copy of the object. Otherwise
* we should not delete the loose representation of this object.
*/
err = got_object_open_packed(&obj, id, repo);
if (err == NULL) {
got_object_close(obj);
/*
* The object is referenced and packed.
* We can purge the redundantly stored loose object.
*/
(*npacked)++;
return NULL;
} else if (err->code != GOT_ERR_NO_OBJ)
return err;
/*
* This object is referenced and not packed.
* Remove it from our purge set.
*/
return got_object_idset_remove(NULL, loose_ids, id);
}
static const struct got_error *
load_tree_entries(struct got_object_id_queue *ids,
struct got_object_idset *loose_ids,
struct got_object_idset *traversed_ids, struct got_object_id *tree_id,
const char *dpath, struct got_repository *repo, int *npacked,
got_cancel_cb cancel_cb, void *cancel_arg)
{
const struct got_error *err;
struct got_tree_object *tree;
char *p = NULL;
int i;
err = got_object_open_as_tree(&tree, repo, tree_id);
if (err)
return err;
for (i = 0; i < got_object_tree_get_nentries(tree); i++) {
struct got_tree_entry *e = got_object_tree_get_entry(tree, i);
struct got_object_id *id = got_tree_entry_get_id(e);
mode_t mode = got_tree_entry_get_mode(e);
if (cancel_cb) {
err = (*cancel_cb)(cancel_arg);
if (err)
break;
}
if (got_object_tree_entry_is_symlink(e) ||
got_object_tree_entry_is_submodule(e) ||
got_object_idset_contains(traversed_ids, id))
continue;
if (asprintf(&p, "%s%s%s", dpath, dpath[0] != '\0' ? "/" : "",
got_tree_entry_get_name(e)) == -1) {
err = got_error_from_errno("asprintf");
break;
}
if (S_ISDIR(mode)) {
struct got_object_qid *qid;
err = got_object_qid_alloc(&qid, id);
if (err)
break;
STAILQ_INSERT_TAIL(ids, qid, entry);
} else if (S_ISREG(mode)) {
/* This blob is referenced. */
err = preserve_loose_object(loose_ids, id, repo,
npacked);
if (err)
break;
err = got_object_idset_add(traversed_ids, id, NULL);
if (err)
break;
}
free(p);
p = NULL;
}
got_object_tree_close(tree);
free(p);
return err;
}
static const struct got_error *
load_tree(struct got_object_idset *loose_ids,
struct got_object_idset *traversed_ids, struct got_object_id *tree_id,
const char *dpath, struct got_repository *repo, int *npacked,
got_cancel_cb cancel_cb, void *cancel_arg)
{
const struct got_error *err = NULL;
struct got_object_id_queue tree_ids;
struct got_object_qid *qid;
err = got_object_qid_alloc(&qid, tree_id);
if (err)
return err;
STAILQ_INIT(&tree_ids);
STAILQ_INSERT_TAIL(&tree_ids, qid, entry);
while (!STAILQ_EMPTY(&tree_ids)) {
if (cancel_cb) {
err = (*cancel_cb)(cancel_arg);
if (err)
break;
}
qid = STAILQ_FIRST(&tree_ids);
STAILQ_REMOVE_HEAD(&tree_ids, entry);
if (got_object_idset_contains(traversed_ids, qid->id)) {
got_object_qid_free(qid);
continue;
}
err = got_object_idset_add(traversed_ids, qid->id, NULL);
if (err) {
got_object_qid_free(qid);
break;
}
/* This tree is referenced. */
err = preserve_loose_object(loose_ids, qid->id, repo, npacked);
if (err)
break;
err = load_tree_entries(&tree_ids, loose_ids, traversed_ids,
qid->id, dpath, repo, npacked, cancel_cb, cancel_arg);
got_object_qid_free(qid);
if (err)
break;
}
got_object_id_queue_free(&tree_ids);
return err;
}
static const struct got_error *
load_commit_or_tag(struct got_object_idset *loose_ids, int *ncommits,
int *npacked, struct got_object_idset *traversed_ids,
struct got_object_id *id, struct got_repository *repo,
got_cleanup_progress_cb progress_cb, void *progress_arg, int nloose,
got_cancel_cb cancel_cb, void *cancel_arg)
{
const struct got_error *err;
struct got_commit_object *commit = NULL;
struct got_tag_object *tag = NULL;
struct got_object_id *tree_id = NULL;
struct got_object_id_queue ids;
struct got_object_qid *qid;
int obj_type;
err = got_object_qid_alloc(&qid, id);
if (err)
return err;
STAILQ_INIT(&ids);
STAILQ_INSERT_TAIL(&ids, qid, entry);
while (!STAILQ_EMPTY(&ids)) {
if (cancel_cb) {
err = (*cancel_cb)(cancel_arg);
if (err)
break;
}
qid = STAILQ_FIRST(&ids);
STAILQ_REMOVE_HEAD(&ids, entry);
if (got_object_idset_contains(traversed_ids, qid->id)) {
got_object_qid_free(qid);
qid = NULL;
continue;
}
err = got_object_idset_add(traversed_ids, qid->id, NULL);
if (err)
break;
/* This commit or tag is referenced. */
err = preserve_loose_object(loose_ids, qid->id, repo, npacked);
if (err)
break;
err = got_object_get_type(&obj_type, repo, qid->id);
if (err)
break;
switch (obj_type) {
case GOT_OBJ_TYPE_COMMIT:
err = got_object_open_as_commit(&commit, repo, qid->id);
if (err)
goto done;
break;
case GOT_OBJ_TYPE_TAG:
err = got_object_open_as_tag(&tag, repo, qid->id);
if (err)
goto done;
break;
default:
/* should not happen */
err = got_error(GOT_ERR_OBJ_TYPE);
goto done;
}
/* Find a tree object to scan. */
if (commit) {
tree_id = got_object_commit_get_tree_id(commit);
} else if (tag) {
obj_type = got_object_tag_get_object_type(tag);
switch (obj_type) {
case GOT_OBJ_TYPE_COMMIT:
err = got_object_open_as_commit(&commit, repo,
got_object_tag_get_object_id(tag));
if (err)
goto done;
tree_id = got_object_commit_get_tree_id(commit);
break;
case GOT_OBJ_TYPE_TREE:
tree_id = got_object_tag_get_object_id(tag);
break;
default:
/*
* Tag points at something other than a
* commit or tree. Leave this weird tag object
* and the object it points to on disk.
*/
err = got_object_idset_remove(NULL, loose_ids,
qid->id);
if (err && err->code != GOT_ERR_NO_OBJ)
goto done;
err = got_object_idset_remove(NULL, loose_ids,
got_object_tag_get_object_id(tag));
if (err && err->code != GOT_ERR_NO_OBJ)
goto done;
err = NULL;
break;
}
}
if (tree_id) {
err = load_tree(loose_ids, traversed_ids, tree_id, "",
repo, npacked, cancel_cb, cancel_arg);
if (err)
break;
}
if (commit || tag)
(*ncommits)++; /* scanned tags are counted as commits */
if (progress_cb) {
err = progress_cb(progress_arg, nloose, *ncommits, -1);
if (err)
break;
}
if (commit) {
/* Find parent commits to scan. */
const struct got_object_id_queue *parent_ids;
parent_ids = got_object_commit_get_parent_ids(commit);
err = got_object_id_queue_copy(parent_ids, &ids);
if (err)
break;
got_object_commit_close(commit);
commit = NULL;
}
if (tag) {
got_object_tag_close(tag);
tag = NULL;
}
got_object_qid_free(qid);
qid = NULL;
}
done:
if (qid)
got_object_qid_free(qid);
if (commit)
got_object_commit_close(commit);
if (tag)
got_object_tag_close(tag);
got_object_id_queue_free(&ids);
return err;
}
struct purge_loose_object_arg {
struct got_repository *repo;
got_cleanup_progress_cb progress_cb;
void *progress_arg;
int nloose;
int ncommits;
int npurged;
off_t size_purged;
int dry_run;
time_t max_mtime;
int ignore_mtime;
};
static const struct got_error *
purge_loose_object(struct got_object_id *id, void *data, void *arg)
{
struct purge_loose_object_arg *a = arg;
const struct got_error *err, *unlock_err = NULL;
char *path = NULL;
int fd = -1;
struct stat sb;
struct got_lockfile *lf = NULL;
err = got_object_get_path(&path, id, a->repo);
if (err)
return err;
err = got_object_open_loose_fd(&fd, id, a->repo);
if (err)
goto done;
if (fstat(fd, &sb) == -1) {
err = got_error_from_errno("fstat");
goto done;
}
/*
* Do not delete objects which are younger than our maximum
* modification time threshold. This prevents a race where
* new objects which are being added to the repository
* concurrently would be deleted.
*/
if (a->ignore_mtime || sb.st_mtime <= a->max_mtime) {
if (!a->dry_run) {
err = got_lockfile_lock(&lf, path, -1);
if (err)
goto done;
if (unlink(path) == -1) {
err = got_error_from_errno2("unlink", path);
goto done;
}
}
a->npurged++;
a->size_purged += sb.st_size;
if (a->progress_cb) {
err = a->progress_cb(a->progress_arg, a->nloose,
a->ncommits, a->npurged);
}
}
done:
if (fd != -1 && close(fd) == -1 && err == NULL)
err = got_error_from_errno("close");
free(path);
if (lf)
unlock_err = got_lockfile_unlock(lf, -1);
return err ? err : unlock_err;
}
const struct got_error *
got_repo_purge_unreferenced_loose_objects(struct got_repository *repo,
off_t *size_before, off_t *size_after, int *npacked, int dry_run,
int ignore_mtime, got_cleanup_progress_cb progress_cb, void *progress_arg,
got_cancel_cb cancel_cb, void *cancel_arg)
{
const struct got_error *err;
struct got_object_idset *loose_ids;
struct got_object_idset *traversed_ids;
struct got_object_id **referenced_ids;
int i, nreferenced, nloose, ncommits = 0;
struct got_reflist_head refs;
struct got_reflist_entry *re;
struct purge_loose_object_arg arg;
time_t max_mtime = 0;
TAILQ_INIT(&refs);
*size_before = 0;
*size_after = 0;
*npacked = 0;
err = get_loose_object_ids(&loose_ids, size_before,
progress_cb, progress_arg, repo);
if (err)
return err;
nloose = got_object_idset_num_elements(loose_ids);
if (nloose == 0) {
got_object_idset_free(loose_ids);
return NULL;
}
traversed_ids = got_object_idset_alloc();
if (traversed_ids == NULL) {
err = got_error_from_errno("got_object_idset_alloc");
goto done;
}
err = got_ref_list(&refs, repo, "", got_ref_cmp_by_name, NULL);
if (err)
goto done;
if (!ignore_mtime) {
TAILQ_FOREACH(re, &refs, entry) {
time_t mtime = got_ref_get_mtime(re->ref);
if (mtime > max_mtime)
max_mtime = mtime;
}
/*
* For safety, keep objects created within 10 minutes
* before the youngest reference was created.
*/
if (max_mtime >= 600)
max_mtime -= 600;
}
err = get_reflist_object_ids(&referenced_ids, &nreferenced,
(1 << GOT_OBJ_TYPE_COMMIT) | (1 << GOT_OBJ_TYPE_TAG),
&refs, repo, cancel_cb, cancel_arg);
if (err)
goto done;
for (i = 0; i < nreferenced; i++) {
struct got_object_id *id = referenced_ids[i];
err = load_commit_or_tag(loose_ids, &ncommits, npacked,
traversed_ids, id, repo, progress_cb, progress_arg, nloose,
cancel_cb, cancel_arg);
if (err)
goto done;
}
/* Produce a final progress report in case no objects can be purged. */
if (got_object_idset_num_elements(loose_ids) == 0 && progress_cb) {
err = progress_cb(progress_arg, nloose, ncommits, 0);
if (err)
goto done;
}
/* Any remaining loose objects are unreferenced and can be purged. */
arg.repo = repo;
arg.progress_arg = progress_arg;
arg.progress_cb = progress_cb;
arg.nloose = nloose;
arg.npurged = 0;
arg.size_purged = 0;
arg.ncommits = ncommits;
arg.dry_run = dry_run;
arg.max_mtime = max_mtime;
arg.ignore_mtime = ignore_mtime;
err = got_object_idset_for_each(loose_ids, purge_loose_object, &arg);
if (err)
goto done;
*size_after = *size_before - arg.size_purged;
done:
got_object_idset_free(loose_ids);
got_object_idset_free(traversed_ids);
return err;
}
static const struct got_error *
remove_packidx(int dir_fd, const char *relpath)
{
const struct got_error *err, *unlock_err;
struct got_lockfile *lf;
err = got_lockfile_lock(&lf, relpath, dir_fd);
if (err)
return err;
if (unlinkat(dir_fd, relpath, 0) == -1)
err = got_error_from_errno("unlinkat");
unlock_err = got_lockfile_unlock(lf, dir_fd);
return err ? err : unlock_err;
}
const struct got_error *
got_repo_remove_lonely_packidx(struct got_repository *repo, int dry_run,
got_lonely_packidx_progress_cb progress_cb, void *progress_arg,
got_cancel_cb cancel_cb, void *cancel_arg)
{
const struct got_error *err;
DIR *packdir = NULL;
struct dirent *dent;
char *pack_relpath = NULL;
int packdir_fd;
struct stat sb;
packdir_fd = openat(got_repo_get_fd(repo),
GOT_OBJECTS_PACK_DIR, O_DIRECTORY);
if (packdir_fd == -1) {
if (errno == ENOENT)
return NULL;
return got_error_from_errno_fmt("openat: %s/%s",
got_repo_get_path_git_dir(repo),
GOT_OBJECTS_PACK_DIR);
}
packdir = fdopendir(packdir_fd);
if (packdir == NULL) {
err = got_error_from_errno("fdopendir");
goto done;
}
while ((dent = readdir(packdir)) != NULL) {
if (cancel_cb) {
err = cancel_cb(cancel_arg);
if (err)
goto done;
}
if (!got_repo_is_packidx_filename(dent->d_name, dent->d_namlen))
continue;
err = got_packidx_get_packfile_path(&pack_relpath,
dent->d_name);
if (err)
goto done;
if (fstatat(packdir_fd, pack_relpath, &sb, 0) != -1) {
free(pack_relpath);
pack_relpath = NULL;
continue;
}
if (errno != ENOENT) {
err = got_error_from_errno_fmt("fstatat: %s/%s/%s",
got_repo_get_path_git_dir(repo),
GOT_OBJECTS_PACK_DIR,
pack_relpath);
goto done;
}
if (!dry_run) {
err = remove_packidx(packdir_fd, dent->d_name);
if (err)
goto done;
}
if (progress_cb) {
char *path;
if (asprintf(&path, "%s/%s/%s",
got_repo_get_path_git_dir(repo),
GOT_OBJECTS_PACK_DIR,
dent->d_name) == -1) {
err = got_error_from_errno("asprintf");
goto done;
}
err = progress_cb(progress_arg, path);
free(path);
if (err)
goto done;
}
free(pack_relpath);
pack_relpath = NULL;
}
done:
if (packdir && closedir(packdir) != 0 && err == NULL)
err = got_error_from_errno("closedir");
free(pack_relpath);
return err;
}
