Adding upstream version 255.4.upstream/255.4

Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>

1 files changed, 149 insertions, 0 deletions

diff --git a/src/shared/btrfs-util.h b/src/shared/btrfs-util.h
new file mode 100644
index 0000000..cd80903
--- /dev/null
+++ b/src/shared/btrfs-util.h
@@ -0,0 +1,149 @@
+/* SPDX-License-Identifier: LGPL-2.1-or-later */
+#pragma once
+
+#include <stdbool.h>
+#include <stdint.h>
+#include <sys/types.h>
+
+#include "sd-id128.h"
+
+#include "btrfs.h"
+#include "copy.h"
+#include "time-util.h"
+
+typedef struct BtrfsSubvolInfo {
+        uint64_t subvol_id;
+        usec_t otime;
+
+        sd_id128_t uuid;
+        sd_id128_t parent_uuid;
+
+        bool read_only;
+} BtrfsSubvolInfo;
+
+typedef struct BtrfsQuotaInfo {
+        uint64_t referenced;
+        uint64_t exclusive;
+        uint64_t referenced_max;
+        uint64_t exclusive_max;
+} BtrfsQuotaInfo;
+
+typedef enum BtrfsSnapshotFlags {
+        BTRFS_SNAPSHOT_FALLBACK_COPY      = 1 << 0, /* If the source isn't a subvolume, reflink everything */
+        BTRFS_SNAPSHOT_READ_ONLY          = 1 << 1,
+        BTRFS_SNAPSHOT_RECURSIVE          = 1 << 2,
+        BTRFS_SNAPSHOT_QUOTA              = 1 << 3,
+        BTRFS_SNAPSHOT_FALLBACK_DIRECTORY = 1 << 4, /* If the destination doesn't support subvolumes, reflink/copy instead */
+        BTRFS_SNAPSHOT_FALLBACK_IMMUTABLE = 1 << 5, /* When we can't create a subvolume, use the FS_IMMUTABLE attribute for indicating read-only */
+        BTRFS_SNAPSHOT_SIGINT             = 1 << 6, /* Check for SIGINT regularly, and return EINTR if seen */
+        BTRFS_SNAPSHOT_SIGTERM            = 1 << 7, /* Ditto, but for SIGTERM */
+        BTRFS_SNAPSHOT_LOCK_BSD           = 1 << 8, /* Return a BSD exclusively locked file descriptor referring to snapshot subvolume/directory. */
+} BtrfsSnapshotFlags;
+
+typedef enum BtrfsRemoveFlags {
+        BTRFS_REMOVE_RECURSIVE = 1 << 0,
+        BTRFS_REMOVE_QUOTA     = 1 << 1,
+} BtrfsRemoveFlags;
+
+int btrfs_is_subvol_at(int dir_fd, const char *path);
+static inline int btrfs_is_subvol_fd(int fd) {
+        return btrfs_is_subvol_at(fd, NULL);
+}
+static inline int btrfs_is_subvol(const char *path) {
+        return btrfs_is_subvol_at(AT_FDCWD, path);
+}
+
+int btrfs_get_block_device_at(int dir_fd, const char *path, dev_t *ret);
+static inline int btrfs_get_block_device(const char *path, dev_t *ret) {
+        return btrfs_get_block_device_at(AT_FDCWD, path, ret);
+}
+static inline int btrfs_get_block_device_fd(int fd, dev_t *ret) {
+        return btrfs_get_block_device_at(fd, "", ret);
+}
+
+int btrfs_defrag_fd(int fd);
+int btrfs_defrag(const char *p);
+
+int btrfs_quota_enable_fd(int fd, bool b);
+int btrfs_quota_enable(const char *path, bool b);
+
+int btrfs_quota_scan_start(int fd);
+int btrfs_quota_scan_wait(int fd);
+int btrfs_quota_scan_ongoing(int fd);
+
+int btrfs_subvol_snapshot_at_full(int dir_fdf, const char *from, int dir_fdt, const char *to, BtrfsSnapshotFlags flags, copy_progress_path_t progress_path, copy_progress_bytes_t progress_bytes, void *userdata);
+static inline int btrfs_subvol_snapshot_at(int dir_fdf, const char *from, int dir_fdt, const char *to, BtrfsSnapshotFlags flags) {
+        return btrfs_subvol_snapshot_at_full(dir_fdf, from, dir_fdt, to, flags, NULL, NULL, NULL);
+}
+
+int btrfs_subvol_remove_at(int dir_fd, const char *path, BtrfsRemoveFlags flags);
+static inline int btrfs_subvol_remove(const char *path, BtrfsRemoveFlags flags) {
+        return btrfs_subvol_remove_at(AT_FDCWD, path, flags);
+}
+
+int btrfs_subvol_set_read_only_at(int dir_fd, const char *path, bool b);
+static inline int btrfs_subvol_set_read_only_fd(int fd, bool b) {
+        return btrfs_subvol_set_read_only_at(fd, NULL, b);
+}
+static inline int btrfs_subvol_set_read_only(const char *path, bool b) {
+        return btrfs_subvol_set_read_only_at(AT_FDCWD, path, b);
+}
+
+int btrfs_subvol_get_read_only_fd(int fd);
+
+int btrfs_subvol_get_id(int fd, const char *subvolume, uint64_t *ret);
+int btrfs_subvol_get_id_fd(int fd, uint64_t *ret);
+int btrfs_subvol_get_parent(int fd, uint64_t subvol_id, uint64_t *ret);
+
+int btrfs_subvol_get_info_fd(int fd, uint64_t subvol_id, BtrfsSubvolInfo *info);
+
+int btrfs_subvol_find_subtree_qgroup(int fd, uint64_t subvol_id, uint64_t *ret);
+
+int btrfs_subvol_get_subtree_quota(const char *path, uint64_t subvol_id, BtrfsQuotaInfo *quota);
+int btrfs_subvol_get_subtree_quota_fd(int fd, uint64_t subvol_id, BtrfsQuotaInfo *quota);
+
+int btrfs_subvol_set_subtree_quota_limit(const char *path, uint64_t subvol_id, uint64_t referenced_max);
+int btrfs_subvol_set_subtree_quota_limit_fd(int fd, uint64_t subvol_id, uint64_t referenced_max);
+
+int btrfs_subvol_auto_qgroup_fd(int fd, uint64_t subvol_id, bool new_qgroup);
+int btrfs_subvol_auto_qgroup(const char *path, uint64_t subvol_id, bool create_intermediary_qgroup);
+
+int btrfs_qgroupid_make(uint64_t level, uint64_t id, uint64_t *ret);
+int btrfs_qgroupid_split(uint64_t qgroupid, uint64_t *level, uint64_t *id);
+
+int btrfs_qgroup_create(int fd, uint64_t qgroupid);
+int btrfs_qgroup_destroy(int fd, uint64_t qgroupid);
+int btrfs_qgroup_destroy_recursive(int fd, uint64_t qgroupid);
+
+int btrfs_qgroup_set_limit_fd(int fd, uint64_t qgroupid, uint64_t referenced_max);
+int btrfs_qgroup_set_limit(const char *path, uint64_t qgroupid, uint64_t referenced_max);
+
+int btrfs_qgroup_copy_limits(int fd, uint64_t old_qgroupid, uint64_t new_qgroupid);
+
+int btrfs_qgroup_assign(int fd, uint64_t child, uint64_t parent);
+int btrfs_qgroup_unassign(int fd, uint64_t child, uint64_t parent);
+
+int btrfs_qgroup_find_parents(int fd, uint64_t qgroupid, uint64_t **ret);
+
+int btrfs_qgroup_get_quota_fd(int fd, uint64_t qgroupid, BtrfsQuotaInfo *quota);
+int btrfs_qgroup_get_quota(const char *path, uint64_t qgroupid, BtrfsQuotaInfo *quota);
+
+static inline int btrfs_log_dev_root(int level, int ret, const char *p) {
+        return log_full_errno(level, ret,
+                              "File system behind %s is reported by btrfs to be backed by pseudo-device /dev/root, which is not a valid userspace accessible device node. "
+                              "Cannot determine correct backing block device.", p);
+}
+
+static inline bool btrfs_might_be_subvol(const struct stat *st) {
+        if (!st)
+                return false;
+
+        /* Returns true if this 'struct stat' looks like it could refer to a btrfs subvolume. To make a final
+         * decision, needs to be combined with an fstatfs() check to see if this is actually btrfs. */
+
+        return S_ISDIR(st->st_mode) && st->st_ino == 256;
+}
+
+int btrfs_forget_device(const char *path);
+
+int btrfs_get_file_physical_offset_fd(int fd, uint64_t *ret);