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Remove the requirement to snapshot content files

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The new content file format now includes metadata for previous versions
of files. This allows the fix command to access historical file data from
snapshots as needed, ensuring recovery even if the live filesystem has
changed or the file was deleted during a sync.
This commit is contained in:
Andrea Mazzoleni 2026-04-28 00:35:15 +02:00
parent 786804ba41
commit cbb4ac831a
13 changed files with 209 additions and 368 deletions
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38
cmdline/unix.c
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@ -1461,7 +1461,7 @@ int fssnapshot_create(const char* source, const char* parent_dir, const char* na
memset(&args, 0, sizeof(args));
args.fd = fd_source;
args.flags = 0;
args.flags = BTRFS_SUBVOL_RDONLY;
pathcpy(args.name, BTRFS_SUBVOL_NAME_MAX, name);
/* issue the snapshot command to the PARENT directory of the destination */
@ -1485,42 +1485,6 @@ int fssnapshot_create(const char* source, const char* parent_dir, const char* na
#endif
}
int fssnapshot_readonly(const char* parent_dir, const char* name)
{
#if HAVE_LINUX_DEVICE
char path[PATH_MAX];
pathcpy(path, sizeof(path), parent_dir);
pathcatc(path, sizeof(path), '/');
pathcat(path, sizeof(path), name);
int fd = open(path, O_RDONLY | O_DIRECTORY);
if (fd < 0)
return -1;
/* get existing flags to avoid overwriting other potential flags */
__u64 flags;
if (ioctl(fd, BTRFS_IOC_SUBVOL_GETFLAGS, &flags) < 0) {
close(fd);
return -1;
}
flags |= BTRFS_SUBVOL_RDONLY;
if (ioctl(fd, BTRFS_IOC_SUBVOL_SETFLAGS, &flags) < 0) {
close(fd);
return -1;
}
close(fd);
return 0;
#else
(void)parent_dir;
(void)name;
return -1;
#endif
}
int fssnapshot_delete(const char* parent_dir, const char* name)
{
#if HAVE_LINUX_DEVICE