#include <sys/snapshot.h>
#include <sys/attr.h>
#include <unistd.h>
#include <errno.h>
#include <stdint.h>
#include <stdlib.h>
extern int __fs_snapshot(uint32_t, int, const char *, const char *, void *,
uint32_t);
int
fs_snapshot_create(int dirfd, const char *name, uint32_t flags)
{
return __fs_snapshot(SNAPSHOT_OP_CREATE, dirfd, name, NULL, NULL, flags);
}
int
fs_snapshot_list(int dirfd, struct attrlist *alist, void *attrbuf, size_t bufsize,
uint32_t flags)
{
if (flags != 0) {
errno = EINVAL;
return (-1);
}
return (getattrlistbulk(dirfd, alist, attrbuf, bufsize,
FSOPT_LIST_SNAPSHOT));
}
int
fs_snapshot_delete(int dirfd, const char *name, uint32_t flags)
{
return __fs_snapshot(SNAPSHOT_OP_DELETE, dirfd, name, NULL, NULL, flags);
}
int
fs_snapshot_rename(int dirfd, const char *old, const char *new, uint32_t flags)
{
return __fs_snapshot(SNAPSHOT_OP_RENAME, dirfd, old, new, NULL, flags);
}
int
fs_snapshot_revert(int dirfd, const char *name, uint32_t flags)
{
return __fs_snapshot(SNAPSHOT_OP_REVERT, dirfd, name, NULL, NULL, flags);
}
#include <sys/stat.h>
#include "strings.h"
#ifndef SNAPSHOT_OP_MOUNT
#define SNAPSHOT_OP_MOUNT 0x4
#endif
#define FS_MOUNT_SNAPSHOT 2
#define MAX_SNAPSHOT_NAMELEN 256
struct fs_mount_options {
uint32_t fs_flags;
uint8_t _padding_[2];
};
struct fs_mount_args {
char *specdev;
struct fs_mount_options options;
uint16_t mode;
uint16_t _padding_[3];
union {
struct { dev_t snap_fsys;
char snap_name[MAX_SNAPSHOT_NAMELEN];
};
struct { };
};
};
int
fs_snapshot_mount(int dirfd, const char *dir, const char *snapshot,
uint32_t flags)
{
struct stat st;
struct fs_mount_args mnt_args;
mnt_args.specdev = NULL;
mnt_args.mode = FS_MOUNT_SNAPSHOT;
if (fstat(dirfd, &st) == -1)
return (-1);
mnt_args.snap_fsys = st.st_dev;
strlcpy(mnt_args.snap_name, snapshot, sizeof(mnt_args.snap_name));
return (__fs_snapshot(SNAPSHOT_OP_MOUNT, dirfd, snapshot, dir,
(void *)&mnt_args, flags));
}