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make 'mode, uid, gid' triplet separate atomized struct 

there are only few combinations for that triplet, and they
occur multiple times reducing the struct sizes a bit. make
sane defaults and prepare to not write defaults to disk
to reduce on-disk installed db size.
cute-signatures
Timo Teräs 2014-11-01 20:18:57 +02:00
parent 36d5b91495
commit 4f823f2a50
3 changed files with 70 additions and 55 deletions
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17
src/apk_database.h
View File

@ -24,16 +24,21 @@
struct apk_name;
APK_ARRAY(apk_name_array, struct apk_name *);
struct apk_db_acl {
mode_t mode;
uid_t uid;
gid_t gid;
};
struct apk_db_file {
struct hlist_node hash_node;
struct hlist_node diri_files_list;
struct apk_db_dir_instance *diri;
mode_t mode;
uid_t uid;
gid_t gid;
struct apk_db_acl *acl;
unsigned short namelen;
unsigned short audited : 1;
unsigned short namelen : 15;
struct apk_checksum csum;
char name[];
};
@ -84,9 +89,7 @@ struct apk_db_dir_instance {
struct hlist_head owned_files;
struct apk_package *pkg;
struct apk_db_dir *dir;
mode_t mode;
uid_t uid;
gid_t gid;
struct apk_db_acl *acl;
};
struct apk_name {

12
src/audit.c
View File

@ -97,7 +97,7 @@ static int audit_file(struct audit_ctx *actx,
if (dbf == NULL)
return 'A';
dbf->mode |= S_SEENFLAG;
dbf->audited = 1;
if (apk_file_get_info(dirfd, name, APK_FI_NOFOLLOW | dbf->csum.type, &fi) != 0)
return -EPERM;
@ -109,11 +109,10 @@ static int audit_file(struct audit_ctx *actx,
if (S_ISLNK(fi.mode) && dbf->csum.type == APK_CHECKSUM_NONE)
return 'U';
if (actx->check_permissions &&
(dbf->mode != 0 || dbf->uid != 0 || dbf->gid != 0)) {
if ((fi.mode & 07777) != (dbf->mode & 07777))
if (actx->check_permissions) {
if ((fi.mode & 07777) != (dbf->acl->mode & 07777))
return 'M';
if (fi.uid != dbf->uid || fi.gid != dbf->gid)
if (fi.uid != dbf->acl->uid || fi.gid != dbf->acl->gid)
return 'M';
}
@ -293,8 +292,7 @@ static int audit_missing_files(apk_hash_item item, void *pctx)
char path[PATH_MAX];
int len;
if (file->mode & S_SEENFLAG)
return 0;
if (file->audited) return 0;
dir = file->diri->dir;
if (dir->mode & S_SEENFLAG) {

96
src/database.c
View File

@ -72,6 +72,8 @@ const char * const apk_installed_file = "lib/apk/db/installed";
static const char * const apk_installed_file_tmp = "lib/apk/db/installed.new";
static const char * const apk_installed_file_old = "var/lib/apk/installed";
static struct apk_db_acl *apk_default_acl_dir, *apk_default_acl_file;
struct install_ctx {
struct apk_database *db;
struct apk_package *pkg;
@ -222,6 +224,14 @@ struct apk_name *apk_db_get_name(struct apk_database *db, apk_blob_t name)
return pn;
}
static struct apk_db_acl *apk_db_acl_atomize(mode_t mode, uid_t uid, gid_t gid)
{
struct apk_db_acl acl = { .mode = mode & 07777, .uid = uid, .gid = gid };
apk_blob_t *b;
b = apk_blob_atomize_dup(APK_BLOB_STRUCT(acl));
return (struct apk_db_acl *) b->ptr;
}
static void apk_db_dir_prepare(struct apk_database *db, struct apk_db_dir *dir, mode_t newmode)
{
struct stat st;
@ -356,6 +366,7 @@ static struct apk_db_dir_instance *apk_db_diri_new(struct apk_database *db,
*after = &diri->pkg_dirs_list.next;
diri->dir = apk_db_dir_get(db, name);
diri->pkg = pkg;
diri->acl = apk_default_acl_dir;
}
return diri;
@ -364,23 +375,20 @@ static struct apk_db_dir_instance *apk_db_diri_new(struct apk_database *db,
static void apk_db_dir_apply_diri_permissions(struct apk_db_dir_instance *diri)
{
struct apk_db_dir *dir = diri->dir;
struct apk_db_acl *acl = diri->acl;
if (diri->uid < dir->uid ||
(diri->uid == dir->uid && diri->gid < dir->gid)) {
dir->uid = diri->uid;
dir->gid = diri->gid;
dir->mode = diri->mode;
} else if (diri->uid == dir->uid && diri->gid == dir->gid) {
dir->mode &= diri->mode;
if (acl->uid < dir->uid || (acl->uid == dir->uid && acl->gid < dir->gid)) {
dir->uid = acl->uid;
dir->gid = acl->gid;
dir->mode = acl->mode;
} else if (acl->uid == dir->uid && acl->gid == dir->gid) {
dir->mode &= acl->mode;
}
}
static void apk_db_diri_set(struct apk_db_dir_instance *diri, mode_t mode,
uid_t uid, gid_t gid)
static void apk_db_diri_set(struct apk_db_dir_instance *diri, struct apk_db_acl *acl)
{
diri->mode = mode & 07777;
diri->uid = uid;
diri->gid = gid;
diri->acl = acl;
apk_db_dir_apply_diri_permissions(diri);
}
@ -431,19 +439,13 @@ static struct apk_db_file *apk_db_file_new(struct apk_db_dir_instance *diri,
file->namelen = name.len;
file->diri = diri;
file->acl = apk_default_acl_file;
hlist_add_after(&file->diri_files_list, *after);
*after = &file->diri_files_list.next;
return file;
}
static void apk_db_file_set(struct apk_db_file *file, mode_t mode, uid_t uid, gid_t gid)
{
file->mode = mode & 07777;
file->uid = uid;
file->gid = gid;
}
static struct apk_db_file *apk_db_file_get(struct apk_database *db,
struct apk_db_dir_instance *diri,
apk_blob_t name,
@ -737,6 +739,7 @@ int apk_db_index_read(struct apk_database *db, struct apk_bstream *bs, int repo)
struct apk_installed_package *ipkg = NULL;
struct apk_db_dir_instance *diri = NULL;
struct apk_db_file *file = NULL;
struct apk_db_acl *acl;
struct hlist_node **diri_node = NULL;
struct hlist_node **file_diri_node = NULL;
apk_blob_t token = APK_BLOB_STR("\n"), l;
@ -813,10 +816,11 @@ int apk_db_index_read(struct apk_database *db, struct apk_bstream *bs, int repo)
gid = apk_blob_pull_uint(&l, 10);
apk_blob_pull_char(&l, ':');
mode = apk_blob_pull_uint(&l, 8);
acl = apk_db_acl_atomize(mode, uid, gid);
if (field == 'M')
apk_db_diri_set(diri, mode, uid, gid);
apk_db_diri_set(diri, acl);
else
apk_db_file_set(file, mode, uid, gid);
file->acl = acl;
break;
case 'R':
if (diri == NULL) goto bad_entry;
@ -866,6 +870,19 @@ bad_entry:
return -1;
}
static void apk_blob_push_db_acl(apk_blob_t *b, char field, struct apk_db_acl *acl)
{
char hdr[2] = { field, ':' };
apk_blob_push_blob(b, APK_BLOB_BUF(hdr));
apk_blob_push_uint(b, acl->uid, 10);
apk_blob_push_blob(b, APK_BLOB_STR(":"));
apk_blob_push_uint(b, acl->gid, 10);
apk_blob_push_blob(b, APK_BLOB_STR(":"));
apk_blob_push_uint(b, acl->mode, 8);
apk_blob_push_blob(b, APK_BLOB_STR("\n"));
}
static int apk_db_write_fdb(struct apk_database *db, struct apk_ostream *os)
{
struct apk_installed_package *ipkg;
@ -909,31 +926,25 @@ static int apk_db_write_fdb(struct apk_database *db, struct apk_ostream *os)
hlist_for_each_entry(diri, c1, &ipkg->owned_dirs, pkg_dirs_list) {
apk_blob_push_blob(&bbuf, APK_BLOB_STR("F:"));
apk_blob_push_blob(&bbuf, APK_BLOB_PTR_LEN(diri->dir->name, diri->dir->namelen));
apk_blob_push_blob(&bbuf, APK_BLOB_STR("\nM:"));
apk_blob_push_uint(&bbuf, diri->uid, 10);
apk_blob_push_blob(&bbuf, APK_BLOB_STR(":"));
apk_blob_push_uint(&bbuf, diri->gid, 10);
apk_blob_push_blob(&bbuf, APK_BLOB_STR(":"));
apk_blob_push_uint(&bbuf, diri->mode, 8);
apk_blob_push_blob(&bbuf, APK_BLOB_STR("\n"));
if (1 || diri->acl != apk_default_acl_dir)
apk_blob_push_db_acl(&bbuf, 'M', diri->acl);
hlist_for_each_entry(file, c2, &diri->owned_files, diri_files_list) {
apk_blob_push_blob(&bbuf, APK_BLOB_STR("R:"));
apk_blob_push_blob(&bbuf, APK_BLOB_PTR_LEN(file->name, file->namelen));
if (file->mode != 0 || file->uid != 0 || file->gid != 0) {
apk_blob_push_blob(&bbuf, APK_BLOB_STR("\na:"));
apk_blob_push_uint(&bbuf, file->uid, 10);
apk_blob_push_blob(&bbuf, APK_BLOB_STR(":"));
apk_blob_push_uint(&bbuf, file->gid, 10);
apk_blob_push_blob(&bbuf, APK_BLOB_STR(":"));
apk_blob_push_uint(&bbuf, file->mode, 8);
}
if (file->csum.type != APK_CHECKSUM_NONE) {
apk_blob_push_blob(&bbuf, APK_BLOB_STR("\nZ:"));
apk_blob_push_csum(&bbuf, &file->csum);
}
apk_blob_push_blob(&bbuf, APK_BLOB_STR("\n"));
if (1 || file->acl != apk_default_acl_file)
apk_blob_push_db_acl(&bbuf, 'a', file->acl);
if (file->csum.type != APK_CHECKSUM_NONE) {
apk_blob_push_blob(&bbuf, APK_BLOB_STR("Z:"));
apk_blob_push_csum(&bbuf, &file->csum);
apk_blob_push_blob(&bbuf, APK_BLOB_STR("\n"));
}
if (os->write(os, buf, bbuf.ptr - buf) != bbuf.ptr - buf)
return -EIO;
bbuf = APK_BLOB_BUF(buf);
@ -1440,6 +1451,9 @@ int apk_db_open(struct apk_database *db, struct apk_db_options *dbopts)
apk_blob_t blob;
int r, fd, write_arch = FALSE;
apk_default_acl_dir = apk_db_acl_atomize(0755, 0, 0);
apk_default_acl_file = apk_db_acl_atomize(0644, 0, 0);
memset(db, 0, sizeof(*db));
if (apk_flags & APK_SIMULATE) {
dbopts->open_flags &= ~(APK_OPENF_CREATE | APK_OPENF_WRITE);
@ -2363,7 +2377,7 @@ static int apk_db_install_archive_entry(void *_ctx,
apk_message("%s", ae->name);
/* Extract the file as name.apk-new */
apk_db_file_set(file, ae->mode, ae->uid, ae->gid);
file->acl = apk_db_acl_atomize(ae->mode, ae->uid, ae->gid);
r = apk_archive_entry_extract(db->root_fd, ae, ".apk-new", is,
extract_cb, ctx);
@ -2405,7 +2419,7 @@ static int apk_db_install_archive_entry(void *_ctx,
diri = apk_db_install_directory_entry(ctx, name);
apk_db_dir_prepare(db, diri->dir, ae->mode);
apk_db_diri_set(diri, ae->mode, ae->uid, ae->gid);
apk_db_diri_set(diri, apk_db_acl_atomize(ae->mode, ae->uid, ae->gid));
}
ctx->installed_size += ctx->current_file_size;