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| author | Denys Vlasenko <vda.linux@googlemail.com> | 2018-07-13 20:30:02 +0200 |
|---|---|---|
| committer | Denys Vlasenko <vda.linux@googlemail.com> | 2018-07-13 20:30:02 +0200 |
| commit | 79fb6ac7a5acc4178b66314c573aeada1d387ed9 (patch) | |
| tree | 421fd899e9dfcc5533b3107af6eba3de0f153044 /libbb/copy_file.c | |
| parent | 253f555f01fa380083a7436a569397a4e7f997b0 (diff) | |
| download | busybox-79fb6ac7a5acc4178b66314c573aeada1d387ed9.tar.gz | |
cp: optional --reflink support
function old new delta
cp_main 428 512 +84
copy_file 1676 1742 +66
Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
Diffstat (limited to 'libbb/copy_file.c')
| -rw-r--r-- | libbb/copy_file.c | 19 |
1 files changed, 19 insertions, 0 deletions
diff --git a/libbb/copy_file.c b/libbb/copy_file.c index 1b8befd65..98bd4fe72 100644 --- a/libbb/copy_file.c +++ b/libbb/copy_file.c @@ -340,8 +340,27 @@ int FAST_FUNC copy_file(const char *source, const char *dest, int flags) } } #endif +#if ENABLE_FEATURE_CP_REFLINK +# undef BTRFS_IOCTL_MAGIC +# define BTRFS_IOCTL_MAGIC 0x94 +# undef BTRFS_IOC_CLONE +# define BTRFS_IOC_CLONE _IOW (BTRFS_IOCTL_MAGIC, 9, int) + if (flags & FILEUTILS_REFLINK) { + retval = ioctl(dst_fd, BTRFS_IOC_CLONE, src_fd); + if (retval == 0) + goto do_close; + /* reflink did not work */ + if (flags & FILEUTILS_REFLINK_ALWAYS) { + bb_perror_msg("failed to clone '%s' from '%s'", dest, source); + goto do_close; + } + /* fall through to standard copy */ + retval = 0; + } +#endif if (bb_copyfd_eof(src_fd, dst_fd) == -1) retval = -1; + IF_FEATURE_CP_REFLINK(do_close:) /* Careful with writing... */ if (close(dst_fd) < 0) { bb_perror_msg("error writing to '%s'", dest); |