From 1d39e33d46f32862da2ec1c394401239515206b8 Mon Sep 17 00:00:00 2001 From: Malek Degachi Date: Sat, 9 Nov 2013 21:27:27 +0100 Subject: fstrim: New applet fstrim applet is a port from util-linux. "Trimming" your NAND/eMMC storage will restore the write performance back to normal after having slow down issues on sequential write and random write due to usage over time. Good reading on subject: http://forum.xda-developers.com/showthread.php?t=1971852 (with long options and CLEAN_UP turned on) function old new delta .rodata 148494 148791 +297 fstrim_main - 283 +283 fstrim_sfx - 128 +128 packed_usage 28826 28903 +77 applet_main 2760 2768 +8 applet_names 2343 2350 +7 applet_nameofs 690 692 +2 ------------------------------------------------------------------------------ (add/remove: 3/0 grow/shrink: 5/0 up/down: 802/0) Total: 802 bytes Signed-off-by: Malek Degachi Cc: Eugene San (eugenesan) Signed-off-by: Bernhard Reutner-Fischer --- util-linux/fstrim.c | 111 ++++++++++++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 111 insertions(+) create mode 100644 util-linux/fstrim.c (limited to 'util-linux/fstrim.c') diff --git a/util-linux/fstrim.c b/util-linux/fstrim.c new file mode 100644 index 000000000..2fa457b5e --- /dev/null +++ b/util-linux/fstrim.c @@ -0,0 +1,111 @@ +/* vi: set sw=4 ts=4: */ +/* + * fstrim.c - discard the part (or whole) of mounted filesystem. + * + * 03 March 2012 - Malek Degachi + * Adapted for busybox from util-linux-2.12a. + * + * Licensed under GPLv2 or later, see file LICENSE in this source tree. + */ + +//usage:#define fstrim_trivial_usage +//usage: "[Options] " +//usage:#define fstrim_full_usage "\n\n" +//usage: "Options:" +//usage: IF_LONG_OPTS( +//usage: "\n -o,--offset=offset offset in bytes to discard from" +//usage: "\n -l,--length=length length of bytes to discard from the offset" +//usage: "\n -m,--minimum=minimum minimum extent length to discard" +//usage: "\n -v,--verbose print number of discarded bytes" +//usage: ) +//usage: IF_NOT_LONG_OPTS( +//usage: "\n -o offset offset in bytes to discard from" +//usage: "\n -l length length of bytes to discard from the offset" +//usage: "\n -m minimum minimum extent length to discard" +//usage: "\n -v, print number of discarded bytes" +//usage: ) + +#include "libbb.h" +#include + +#ifndef FITRIM +struct fstrim_range { + uint64_t start; + uint64_t len; + uint64_t minlen; +}; +#define FITRIM _IOWR('X', 121, struct fstrim_range) +#endif + +static const struct suffix_mult fstrim_sfx[] = { + { "KiB", 1024 }, + { "kiB", 1024 }, + { "K", 1024 }, + { "k", 1024 }, + { "MiB", 1048576 }, + { "miB", 1048576 }, + { "M", 1048576 }, + { "m", 1048576 }, + { "GiB", 1073741824 }, + { "giB", 1073741824 }, + { "G", 1073741824 }, + { "g", 1073741824 }, + { "KB", 1000 }, + { "MB", 1000000 }, + { "GB", 1000000000 }, + { "", 0 } +}; + +int fstrim_main(int argc, char **argv) MAIN_EXTERNALLY_VISIBLE; +int fstrim_main(int argc UNUSED_PARAM, char **argv) +{ + struct fstrim_range range; + char *arg_o; + char *arg_l; + char *arg_m; + unsigned opts; + int fd; + + enum { + OPT_o = (1 << 0), + OPT_l = (1 << 1), + OPT_m = (1 << 2), + OPT_v = (1 << 3), + }; + +#if ENABLE_LONG_OPTS + static const char getopt_longopts[] ALIGN1 = + "offset\0" Required_argument "o" + "length\0" Required_argument "l" + "minimum\0" Required_argument "m" + "verbose\0" No_argument "v" + ; + applet_long_options = getopt_longopts; +#endif + + opt_complementary = "=1"; /* exactly one non-option arg: the mountpoint */ + opts = getopt32(argv, "o:l:m:v", &arg_o, &arg_l, &arg_m); + + memset(&range, 0, sizeof(range)); + range.len = ULLONG_MAX; + + if (opts & OPT_o) + range.start = xatoull_sfx(arg_o, fstrim_sfx); + if (opts & OPT_l) + range.len = xatoull_sfx(arg_l, fstrim_sfx); + if (opts & OPT_m) + range.minlen = xatoull_sfx(arg_m, fstrim_sfx); + + if (find_block_device(argv[optind])) { + fd = xopen_nonblocking(argv[optind]); + xioctl(fd, FITRIM, &range); + if (ENABLE_FEATURE_CLEAN_UP) + close(fd); + + if (opts & OPT_v) + printf("%s: %llu bytes were trimmed\n", argv[optind], range.len); + } + + return EXIT_SUCCESS; +} + -- cgit v1.2.3