diff options
| -rw-r--r-- | include/applets.src.h | 1 | ||||
| -rw-r--r-- | util-linux/Config.src | 7 | ||||
| -rw-r--r-- | util-linux/Kbuild.src | 1 | ||||
| -rw-r--r-- | util-linux/fstrim.c | 111 |
4 files changed, 120 insertions, 0 deletions
diff --git a/include/applets.src.h b/include/applets.src.h index 3a47e15b9..5268200f5 100644 --- a/include/applets.src.h +++ b/include/applets.src.h @@ -167,6 +167,7 @@ IF_FSCK(APPLET(fsck, BB_DIR_SBIN, BB_SUID_DROP)) //IF_E2FSCK(APPLET_ODDNAME(fsck.ext2, e2fsck, BB_DIR_SBIN, BB_SUID_DROP, fsck_ext2)) //IF_E2FSCK(APPLET_ODDNAME(fsck.ext3, e2fsck, BB_DIR_SBIN, BB_SUID_DROP, fsck_ext3)) IF_FSCK_MINIX(APPLET_ODDNAME(fsck.minix, fsck_minix, BB_DIR_SBIN, BB_SUID_DROP, fsck_minix)) +IF_FSTRIM(APPLET(fstrim, BB_DIR_SBIN, BB_SUID_DROP)) IF_FSYNC(APPLET_NOFORK(fsync, fsync, BB_DIR_BIN, BB_SUID_DROP, fsync)) IF_FTPD(APPLET(ftpd, BB_DIR_USR_SBIN, BB_SUID_DROP)) IF_FTPGET(APPLET_ODDNAME(ftpget, ftpgetput, BB_DIR_USR_BIN, BB_SUID_DROP, ftpget)) diff --git a/util-linux/Config.src b/util-linux/Config.src index 5a8b0063b..ef7039720 100644 --- a/util-linux/Config.src +++ b/util-linux/Config.src @@ -246,6 +246,13 @@ config FSCK_MINIX check for and attempt to repair any corruption that occurs to a minix filesystem. +config FSTRIM + bool "fstrim" + default y + select PLATFORM_LINUX + help + Discard unused blocks on a mounted filesystem. + config MKFS_EXT2 bool "mkfs_ext2" default y diff --git a/util-linux/Kbuild.src b/util-linux/Kbuild.src index 468fc6bc1..429cf1100 100644 --- a/util-linux/Kbuild.src +++ b/util-linux/Kbuild.src @@ -18,6 +18,7 @@ lib-$(CONFIG_FINDFS) += findfs.o lib-$(CONFIG_FLOCK) += flock.o lib-$(CONFIG_FREERAMDISK) += freeramdisk.o lib-$(CONFIG_FSCK_MINIX) += fsck_minix.o +lib-$(CONFIG_FSTRIM) += fstrim.o lib-$(CONFIG_GETOPT) += getopt.o lib-$(CONFIG_HEXDUMP) += hexdump.o lib-$(CONFIG_HWCLOCK) += hwclock.o 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 <malek-degachi@laposte.net> + * 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] <mountpoint>" +//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 <linux/fs.h> + +#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; +} + |