packaging
/
ostree
1
0
Fork 0
Code Issues Pull Requests Packages Projects Releases Wiki Activity
ostree/src/libostree/ostree-repo-private.h

569 lines
21 KiB
C
Raw Blame History

/*
* Copyright (C) 2011,2013 Colin Walters <walters@verbum.org>
*
* SPDX-License-Identifier: LGPL-2.0+
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License as published by the Free Software Foundation; either
* version 2 of the License, or (at your option) any later version.
*
* This library is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with this library. If not, see <https://www.gnu.org/licenses/>.
*/
#pragma once
#include <sys/statvfs.h>
#include "config.h"
#include "otutil.h"
#include "ostree-ref.h"
#include "ostree-repo.h"
#include "ostree-remote-private.h"
G_BEGIN_DECLS
#define OSTREE_DELTAPART_VERSION (0)
#define _OSTREE_SUMMARY_CACHE_DIR "summaries"
#define _OSTREE_CACHE_DIR "cache"
#define _OSTREE_MAX_OUTSTANDING_FETCHER_REQUESTS 8
#define _OSTREE_MAX_OUTSTANDING_DELTAPART_REQUESTS 2
/* We want some parallelism with disk writes, but we also
* want to avoid starting tens or hundreds of threads
* (via GTask) all writing to disk. Eventually we may
* use io_uring which handles backpressure correctly.
* Also, in "immediate fsync" mode, this helps provide
* much more backpressure, helping our I/O patterns
* be nicer for any concurrent processes, such as etcd
* or other databases.
* https://github.com/openshift/machine-config-operator/issues/1897
* */
#define _OSTREE_MAX_OUTSTANDING_WRITE_REQUESTS 3
/* Well-known keys for the additional metadata field in a summary file. */
#define OSTREE_SUMMARY_LAST_MODIFIED "ostree.summary.last-modified"
#define OSTREE_SUMMARY_EXPIRES "ostree.summary.expires"
#define OSTREE_SUMMARY_COLLECTION_ID "ostree.summary.collection-id"
#define OSTREE_SUMMARY_COLLECTION_MAP "ostree.summary.collection-map"
#define OSTREE_SUMMARY_MODE "ostree.summary.mode"
#define OSTREE_SUMMARY_TOMBSTONE_COMMITS "ostree.summary.tombstone-commits"
#define OSTREE_SUMMARY_INDEXED_DELTAS "ostree.summary.indexed-deltas"
#define _OSTREE_PAYLOAD_LINK_PREFIX "../"
#define _OSTREE_PAYLOAD_LINK_PREFIX_LEN (sizeof (_OSTREE_PAYLOAD_LINK_PREFIX) - 1)
/* Well-known keys for the additional metadata field in a commit in a ref entry
* in a summary file. */
#define OSTREE_COMMIT_TIMESTAMP "ostree.commit.timestamp"
#define OSTREE_COMMIT_VERSION "ostree.commit.version"
typedef enum {
OSTREE_REPO_TEST_ERROR_PRE_COMMIT = (1 << 0),
OSTREE_REPO_TEST_ERROR_INVALID_CACHE = (1 << 1),
} OstreeRepoTestErrorFlags;
struct OstreeRepoCommitModifier {
gint refcount; /* atomic */
OstreeRepoCommitModifierFlags flags;
OstreeRepoCommitFilter filter;
gpointer user_data;
GDestroyNotify destroy_notify;
OstreeRepoCommitModifierXattrCallback xattr_callback;
GDestroyNotify xattr_destroy;
gpointer xattr_user_data;
GLnxTmpDir sepolicy_tmpdir;
OstreeSePolicy *sepolicy;
GHashTable *devino_cache;
};
typedef enum {
OSTREE_REPO_SYSROOT_KIND_UNKNOWN,
OSTREE_REPO_SYSROOT_KIND_NO, /* Not a system repo */
OSTREE_REPO_SYSROOT_KIND_VIA_SYSROOT, /* Constructed via ostree_sysroot_get_repo() */
OSTREE_REPO_SYSROOT_KIND_IS_SYSROOT_OSTREE, /* We match /ostree/repo */
} OstreeRepoSysrootKind;
typedef struct {
GHashTable *refs; /* (element-type utf8 utf8) */
GHashTable *collection_refs; /* (element-type OstreeCollectionRef utf8) */
OstreeRepoTransactionStats stats;
/* Implementation of min-free-space-percent */
gulong blocksize;
fsblkcnt_t max_blocks;
} OstreeRepoTxn;
typedef struct {
GMutex mutex; /* All other members should only be accessed with this held */
int fd; /* The open file or flock file descriptor */
guint shared; /* Number of shared locks curently held */
guint exclusive; /* Number of exclusive locks currently held */
} OstreeRepoLock;
typedef enum {
_OSTREE_FEATURE_NO,
_OSTREE_FEATURE_MAYBE,
_OSTREE_FEATURE_YES,
} _OstreeFeatureSupport;
/* Possible values for the sysroot.bootloader configuration variable */
typedef enum {
CFG_SYSROOT_BOOTLOADER_OPT_AUTO = 0,
CFG_SYSROOT_BOOTLOADER_OPT_NONE,
CFG_SYSROOT_BOOTLOADER_OPT_GRUB2,
CFG_SYSROOT_BOOTLOADER_OPT_SYSLINUX,
CFG_SYSROOT_BOOTLOADER_OPT_UBOOT,
CFG_SYSROOT_BOOTLOADER_OPT_ZIPL,
/* Non-exhaustive */
} OstreeCfgSysrootBootloaderOpt;
static const char* const CFG_SYSROOT_BOOTLOADER_OPTS_STR[] = {
/* This must be kept in the same order as the enum */
"auto",
"none",
"grub2",
"syslinux",
"uboot",
"zipl",
NULL,
};
/**
* OstreeRepo:
*
* Private instance structure.
*/
struct OstreeRepo {
GObject parent;
char *stagedir_prefix;
GLnxTmpDir commit_stagedir;
GLnxLockFile commit_stagedir_lock;
/* A cached fd-relative version, distinct from the case where we may have a
* user-provided absolute path.
*/
GFile *repodir_fdrel;
GFile *repodir; /* May be %NULL if we were opened via ostree_repo_open_at() */
int repo_dir_fd;
int tmp_dir_fd;
int cache_dir_fd;
char *cache_dir;
int objects_dir_fd;
int uncompressed_objects_dir_fd;
GFile *sysroot_dir;
GWeakRef sysroot; /* Weak to avoid a circular ref; see also `is_system` */
char *remotes_config_dir;
OstreeRepoLock lock;
GMutex txn_lock;
OstreeRepoTxn txn;
gboolean txn_locked;
_OstreeFeatureSupport fs_verity_wanted;
_OstreeFeatureSupport fs_verity_supported;
GMutex cache_lock;
guint dirmeta_cache_refcount;
/* char * checksum → GVariant * for dirmeta objects, used in the checkout path */
GHashTable *dirmeta_cache;
gboolean inited;
gboolean writable;
OstreeRepoSysrootKind sysroot_kind;
GError *writable_error;
gboolean in_transaction;
gboolean disable_fsync;
gboolean per_object_fsync;
gboolean disable_xattrs;
guint zlib_compression_level;
GHashTable *loose_object_devino_hash;
GHashTable *updated_uncompressed_dirs;
/* FIXME: The object sizes hash table is really per-commit state, not repo
* state. Using a single table for the repo means that commits cannot be
* built simultaneously if they're adding size information. This data should
* probably be in OstreeMutableTree, but that's gone by the time the actual
* commit is constructed. At that point the only commit state is in the root
* OstreeRepoFile.
*/
GHashTable *object_sizes;
/* Cache the repo's device/inode to use for comparisons elsewhere */
dev_t device;
ino_t inode;
uid_t owner_uid; /* Cache of repo's owner uid */
guint min_free_space_percent; /* See the min-free-space-percent config option */
guint64 min_free_space_mb; /* See the min-free-space-size config option */
guint64 reserved_blocks;
gboolean cleanup_stagedir;
guint test_error_flags; /* OstreeRepoTestErrorFlags */
GKeyFile *config;
GHashTable *remotes;
GMutex remotes_lock;
OstreeRepoMode mode;
gboolean enable_uncompressed_cache;
gboolean generate_sizes;
guint64 tmp_expiry_seconds;
gchar *collection_id;
gboolean add_remotes_config_dir; /* Add new remotes in remotes.d dir */
gint lock_timeout_seconds;
guint64 payload_link_threshold;
gint fs_support_reflink; /* The underlying filesystem has support for ioctl (FICLONE..) */
gchar **repo_finders;
OstreeCfgSysrootBootloaderOpt bootloader; /* Configure which bootloader to use. */
GHashTable *bls_append_values; /* Parsed key-values from bls-append-except-default key in config. */
OstreeRepo *parent_repo;
};
typedef struct {
dev_t dev;
ino_t ino;
char checksum[OSTREE_SHA256_STRING_LEN+1];
} OstreeDevIno;
/* A MemoryCacheRef is an in-memory cache of objects (currently just DIRMETA). This can
* be used when performing an operation that traverses a repository in someway. Currently,
* the primary use case is ostree_repo_checkout_at() avoiding lots of duplicate dirmeta
* lookups.
*/
typedef struct {
OstreeRepo *repo;
} OstreeRepoMemoryCacheRef;
void
_ostree_repo_memory_cache_ref_init (OstreeRepoMemoryCacheRef *state,
OstreeRepo *repo);
void
_ostree_repo_memory_cache_ref_destroy (OstreeRepoMemoryCacheRef *state);
G_DEFINE_AUTO_CLEANUP_CLEAR_FUNC(OstreeRepoMemoryCacheRef, _ostree_repo_memory_cache_ref_destroy)
#define OSTREE_REPO_TMPDIR_STAGING "staging-"
gboolean
_ostree_repo_allocate_tmpdir (int tmpdir_dfd,
const char *tmpdir_prefix,
GLnxTmpDir *tmpdir_out,
GLnxLockFile *file_lock_out,
gboolean * reusing_dir_out,
GCancellable *cancellable,
GError **error);
gboolean
_ostree_repo_has_staging_prefix (const char *filename);
gboolean
_ostree_repo_try_lock_tmpdir (int tmpdir_dfd,
const char *tmpdir_name,
GLnxLockFile *file_lock_out,
gboolean *out_did_lock,
GError **error);
gboolean
_ostree_repo_ensure_loose_objdir_at (int dfd,
const char *loose_path,
GCancellable *cancellable,
GError **error);
GFile *
_ostree_repo_get_commit_metadata_loose_path (OstreeRepo *self,
const char *checksum);
gboolean
_ostree_repo_has_loose_object (OstreeRepo *self,
const char *checksum,
OstreeObjectType objtype,
gboolean *out_is_stored,
GCancellable *cancellable,
GError **error);
gboolean
_ostree_write_bareuser_metadata (int fd,
guint32 uid,
guint32 gid,
guint32 mode,
GVariant *xattrs,
GError **error);
gboolean
_ostree_repo_write_directory_meta (OstreeRepo *self,
GFileInfo *file_info,
GVariant *xattrs,
guchar **out_csum,
GCancellable *cancellable,
GError **error);
gboolean
_ostree_repo_update_refs (OstreeRepo *self,
GHashTable *refs,
GCancellable *cancellable,
GError **error);
gboolean
_ostree_repo_update_collection_refs (OstreeRepo *self,
GHashTable *refs,
GCancellable *cancellable,
GError **error);
gboolean
_ostree_repo_file_replace_contents (OstreeRepo *self,
int dfd,
const char *path,
const guint8 *buf,
gsize len,
GCancellable *cancellable,
GError **error);
gboolean
_ostree_repo_write_ref (OstreeRepo *self,
const char *remote,
const OstreeCollectionRef *ref,
const char *rev,
const char *alias,
GCancellable *cancellable,
GError **error);
OstreeRepoFile *
_ostree_repo_file_new_for_commit (OstreeRepo *repo,
const char *commit,
GError **error);
OstreeRepoFile *
_ostree_repo_file_new_root (OstreeRepo *repo,
const char *contents_checksum,
const char *metadata_checksum);
gboolean
_ostree_repo_traverse_dirtree_internal (OstreeRepo *repo,
const char *dirtree_checksum,
int recursion_depth,
GHashTable *inout_reachable,
GHashTable *inout_content_names,
GCancellable *cancellable,
GError **error);
OstreeRepoCommitFilterResult
_ostree_repo_commit_modifier_apply (OstreeRepo *self,
OstreeRepoCommitModifier *modifier,
const char *path,
GFileInfo *file_info,
GFileInfo **out_modified_info);
void
_ostree_repo_setup_generate_sizes (OstreeRepo *self,
OstreeRepoCommitModifier *modifier);
gboolean
_ostree_repo_remote_name_is_file (const char *remote_name);
#ifndef OSTREE_DISABLE_GPGME
OstreeGpgVerifyResult *
_ostree_repo_gpg_verify_with_metadata (OstreeRepo *self,
GBytes *signed_data,
GVariant *metadata,
const char *remote_name,
GFile *keyringdir,
GFile *extra_keyring,
GCancellable *cancellable,
GError **error);
OstreeGpgVerifyResult *
_ostree_repo_verify_commit_internal (OstreeRepo *self,
const char *commit_checksum,
const char *remote_name,
GFile *keyringdir,
GFile *extra_keyring,
GCancellable *cancellable,
GError **error);
#endif /* OSTREE_DISABLE_GPGME */
typedef enum {
_OSTREE_REPO_IMPORT_FLAGS_NONE = 0,
_OSTREE_REPO_IMPORT_FLAGS_TRUSTED = (1 << 0),
_OSTREE_REPO_IMPORT_FLAGS_VERIFY_BAREUSERONLY = (1 << 1),
} OstreeRepoImportFlags;
gboolean
_ostree_repo_import_object (OstreeRepo *self,
OstreeRepo *source,
OstreeObjectType objtype,
const char *checksum,
OstreeRepoImportFlags flags,
GCancellable *cancellable,
GError **error);
gboolean
_ostree_repo_commit_tmpf_final (OstreeRepo *self,
const char *checksum,
OstreeObjectType objtype,
GLnxTmpfile *tmpf,
GCancellable *cancellable,
GError **error);
typedef struct {
gboolean initialized;
gpointer opaque0[10];
guint opaque1[10];
} OstreeRepoBareContent;
void _ostree_repo_bare_content_cleanup (OstreeRepoBareContent *regwrite);
G_DEFINE_AUTO_CLEANUP_CLEAR_FUNC(OstreeRepoBareContent, _ostree_repo_bare_content_cleanup)
gboolean
_ostree_repo_bare_content_open (OstreeRepo *self,
const char *checksum,
guint64 content_len,
guint uid,
guint gid,
guint mode,
GVariant *xattrs,
OstreeRepoBareContent *out_regwrite,
GCancellable *cancellable,
GError **error);
gboolean
_ostree_repo_bare_content_write (OstreeRepo *repo,
OstreeRepoBareContent *barewrite,
const guint8 *buf,
size_t len,
GCancellable *cancellable,
GError **error);
gboolean
_ostree_repo_bare_content_commit (OstreeRepo *self,
OstreeRepoBareContent *barewrite,
char *checksum_buf,
size_t buflen,
GCancellable *cancellable,
GError **error);
OstreeContentWriter *
_ostree_content_writer_new (OstreeRepo *repo,
const char *checksum,
guint uid,
guint gid,
guint mode,
guint64 content_len,
GVariant *xattrs,
GError **error);
gboolean
_ostree_repo_load_file_bare (OstreeRepo *self,
const char *checksum,
int *out_fd,
struct stat *out_stbuf,
char **out_symlink,
GVariant **out_xattrs,
GCancellable *cancellable,
GError **error);
gboolean
_ostree_repo_update_mtime (OstreeRepo *self,
GError **error);
gboolean
_ostree_repo_add_remote (OstreeRepo *self,
OstreeRemote *remote);
gboolean
_ostree_repo_remove_remote (OstreeRepo *self,
OstreeRemote *remote);
OstreeRemote *
_ostree_repo_get_remote (OstreeRepo *self,
const char *name,
GError **error);
OstreeRemote *
_ostree_repo_get_remote_inherited (OstreeRepo *self,
const char *name,
GError **error);
gboolean
_ostree_repo_maybe_regenerate_summary (OstreeRepo *self,
GCancellable *cancellable,
GError **error);
gboolean _ostree_repo_parse_fsverity_config (OstreeRepo *self, GError **error);
gboolean
_ostree_tmpf_fsverity_core (GLnxTmpfile *tmpf,
_OstreeFeatureSupport fsverity_requested,
gboolean *supported,
GError **error);
gboolean
_ostree_tmpf_fsverity (OstreeRepo *self,
GLnxTmpfile *tmpf,
GError **error);
gboolean
_ostree_repo_verify_bindings (const char *collection_id,
const char *ref_name,
GVariant *commit,
GError **error);
GHashTable *
ostree_repo_list_objects_set (OstreeRepo *self,
OstreeRepoListObjectsFlags flags,
GCancellable *cancellable,
GError **error);
/**
* OstreeRepoAutoTransaction:
*
* A transaction guard for a specific #OstreeRepo. It can be explicitly
* completed through abort/commit. If the guard has not been completed
* beforehand, on cleanup it is automatically aborted.
*
* Taken from flatpak; may be made into public API later
*/
typedef struct
{
gint atomic_refcount;
OstreeRepo *repo;
} OstreeRepoAutoTransaction;
OstreeRepoAutoTransaction *
_ostree_repo_auto_transaction_start (OstreeRepo *repo,
GCancellable *cancellable,
GError **error);
gboolean
_ostree_repo_auto_transaction_abort (OstreeRepoAutoTransaction *txn,
GCancellable *cancellable,
GError **error);
gboolean
_ostree_repo_auto_transaction_commit (OstreeRepoAutoTransaction *txn,
OstreeRepoTransactionStats *out_stats,
GCancellable *cancellable,
GError **error);
OstreeRepoAutoTransaction *
_ostree_repo_auto_transaction_ref (OstreeRepoAutoTransaction *txn);
void
_ostree_repo_auto_transaction_unref (OstreeRepoAutoTransaction *txn);
GType _ostree_repo_auto_transaction_get_type (void);
G_DEFINE_AUTOPTR_CLEANUP_FUNC (OstreeRepoAutoTransaction, _ostree_repo_auto_transaction_unref);
/* Internal function to break a circular dependency:
* should not be made into public API, even if the rest is */
OstreeRepoAutoTransaction *_ostree_repo_auto_transaction_new (OstreeRepo *repo);
G_END_DECLS
Reference in New Issue View Git Blame Copy Permalink