mirror of
https://github.com/morgan9e/systemd
synced 2026-04-14 08:25:20 +09:00
f102bc3e5f
Let's not leak details from src/shared and src/libsystemd into src/basic, even though you can't actually do anything useful with just forward declarations from src/shared. The sd-forward.h header is put in src/libsystemd/sd-common as we don't have a directory for shared internal headers for libsystemd yet. Let's also rename forward.h to basic-forward.h to keep things self-explanatory.
68 lines
2.9 KiB
C
68 lines
2.9 KiB
C
/* SPDX-License-Identifier: LGPL-2.1-or-later */
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#pragma once
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#include <linux/fs.h>
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#include "basic-forward.h"
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/* The chattr() flags to apply when creating a new file *before* writing to it. In particular, flags such as
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* FS_NOCOW_FL don't work if applied a-posteriori. All other flags are fine (or even necessary, think
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* FS_IMMUTABLE_FL!) to apply after writing to the files. */
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#define CHATTR_EARLY_FL \
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(FS_NOATIME_FL | \
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FS_COMPR_FL | \
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FS_NOCOW_FL | \
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FS_NOCOMP_FL | \
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FS_PROJINHERIT_FL)
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#define CHATTR_ALL_FL \
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(FS_NOATIME_FL | \
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FS_SYNC_FL | \
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FS_DIRSYNC_FL | \
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FS_APPEND_FL | \
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FS_COMPR_FL | \
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FS_NODUMP_FL | \
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FS_EXTENT_FL | \
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FS_IMMUTABLE_FL | \
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FS_JOURNAL_DATA_FL | \
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FS_SECRM_FL | \
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FS_UNRM_FL | \
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FS_NOTAIL_FL | \
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FS_TOPDIR_FL | \
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FS_NOCOW_FL | \
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FS_PROJINHERIT_FL)
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typedef enum ChattrApplyFlags {
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CHATTR_FALLBACK_BITWISE = 1 << 0,
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CHATTR_WARN_UNSUPPORTED_FLAGS = 1 << 1,
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} ChattrApplyFlags;
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int chattr_full(int dir_fd, const char *path, unsigned value, unsigned mask, unsigned *ret_previous, unsigned *ret_final, ChattrApplyFlags flags);
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static inline int chattr_at(int dir_fd, const char *path, unsigned value, unsigned mask) {
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return chattr_full(dir_fd, path, value, mask, NULL, NULL, 0);
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}
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static inline int chattr_fd(int fd, unsigned value, unsigned mask) {
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return chattr_full(fd, NULL, value, mask, NULL, NULL, 0);
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}
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static inline int chattr_path(const char *path, unsigned value, unsigned mask) {
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return chattr_full(AT_FDCWD, path, value, mask, NULL, NULL, 0);
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}
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int read_attr_fd(int fd, unsigned *ret);
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int read_attr_at(int dir_fd, const char *path, unsigned *ret);
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int read_fs_xattr_fd(int fd, uint32_t *ret_xflags, uint32_t *ret_projid);
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int set_proj_id(int fd, uint32_t proj_id);
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int set_proj_id_recursive(int fd, uint32_t proj_id);
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/* Combination of chattr flags, that should be appropriate for secrets stored on disk: Secure Remove +
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* Exclusion from Dumping + Synchronous Writing (i.e. not caching in memory) + In-Place Updating (i.e. not
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* spurious copies). */
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#define CHATTR_SECRET_FLAGS (FS_SECRM_FL|FS_NODUMP_FL|FS_SYNC_FL|FS_NOCOW_FL)
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static inline int chattr_secret(int fd, ChattrApplyFlags flags) {
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return chattr_full(fd, NULL, CHATTR_SECRET_FLAGS, CHATTR_SECRET_FLAGS, NULL, NULL, flags|CHATTR_FALLBACK_BITWISE);
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}
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bool inode_type_can_chattr(mode_t mode);
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