diff options
| -rw-r--r-- | coreutils/cp.c | 24 | ||||
| -rw-r--r-- | include/libbb.h | 3 | ||||
| -rw-r--r-- | libbb/copy_file.c | 19 |
3 files changed, 46 insertions, 0 deletions
diff --git a/coreutils/cp.c b/coreutils/cp.c index 455bffb..b623aaf 100644 --- a/coreutils/cp.c +++ b/coreutils/cp.c @@ -24,6 +24,11 @@ //config: help //config: Enable long options. //config: Also add support for --parents option. +//config: +//config:config FEATURE_CP_REFLINK +//config: bool "Enable --reflink[=auto] +//config: default y +//config: depends on FEATURE_CP_LONG_OPTIONS //applet:IF_CP(APPLET_NOEXEC(cp, cp, BB_DIR_BIN, BB_SUID_DROP, cp)) /* NOEXEC despite cases when it can be a "runner" (cp -r LARGE_DIR NEW_DIR) */ @@ -72,10 +77,14 @@ int cp_main(int argc, char **argv) #if ENABLE_FEATURE_CP_LONG_OPTIONS /*OPT_rmdest = FILEUTILS_RMDEST = 1 << FILEUTILS_CP_OPTNUM */ OPT_parents = 1 << (FILEUTILS_CP_OPTNUM+1), + OPT_reflink = 1 << (FILEUTILS_CP_OPTNUM+2), #endif }; #if ENABLE_FEATURE_CP_LONG_OPTIONS +# if ENABLE_FEATURE_CP_REFLINK + char *reflink = NULL; +# endif flags = getopt32long(argv, "^" FILEUTILS_CP_OPTSTR "\0" @@ -99,7 +108,22 @@ int cp_main(int argc, char **argv) "update\0" No_argument "u" "remove-destination\0" No_argument "\xff" "parents\0" No_argument "\xfe" +# if ENABLE_FEATURE_CP_REFLINK + "reflink\0" Optional_argument "\xfd" + , &reflink +# endif ); +# if ENABLE_FEATURE_CP_REFLINK + BUILD_BUG_ON(OPT_reflink != FILEUTILS_REFLINK); + if (flags & FILEUTILS_REFLINK) { + if (!reflink) + flags |= FILEUTILS_REFLINK_ALWAYS; + else if (strcmp(reflink, "always") == 0) + flags |= FILEUTILS_REFLINK_ALWAYS; + else if (strcmp(reflink, "auto") != 0) + bb_show_usage(); + } +# endif #else flags = getopt32(argv, "^" FILEUTILS_CP_OPTSTR diff --git a/include/libbb.h b/include/libbb.h index d4ba031..94caba2 100644 --- a/include/libbb.h +++ b/include/libbb.h @@ -410,6 +410,9 @@ enum { /* cp.c, mv.c, install.c depend on these values. CAREFUL when changing th FILEUTILS_PRESERVE_SECURITY_CONTEXT = 1 << 15, /* -c */ #endif FILEUTILS_RMDEST = 1 << (16 - !ENABLE_SELINUX), /* --remove-destination */ + /* bit 17 skipped for "cp --parents" */ + FILEUTILS_REFLINK = 1 << (18 - !ENABLE_SELINUX), /* cp --reflink=auto */ + FILEUTILS_REFLINK_ALWAYS = 1 << (19 - !ENABLE_SELINUX), /* cp --reflink[=always] */ /* * Hole. cp may have some bits set here, * they should not affect remove_file()/copy_file() diff --git a/libbb/copy_file.c b/libbb/copy_file.c index 1b8befd..98bd4fe 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); |