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Add bcachectl: to start bcache, add and remove devices.

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Useful for lifecycle management of bcache devices.

Change-Id: Icdcb559786ab0557dbe7f2a30b5dbeacf7dad665
Signed-off-by: Surbhi Palande <sap@daterainc.com>
This commit is contained in:
Surbhi Palande 2014-08-05 11:25:20 -07:00 committed by Surbhi Palande
parent 039b45dfe9
commit 73ef76c1c0
3 changed files with 59 additions and 4 deletions
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7
Makefile
View File

@ -5,10 +5,10 @@ DRACUTLIBDIR=/lib/dracut
INSTALL=install
CFLAGS+=-O2 -Wall -g
all: make-bcache probe-bcache bcache-super-show
all: make-bcache probe-bcache bcache-super-show bcachectl
install: make-bcache probe-bcache bcache-super-show
$(INSTALL) -m0755 make-bcache bcache-super-show $(DESTDIR)${PREFIX}/sbin/
$(INSTALL) -m0755 make-bcache bcache-super-show bcachectl $(DESTDIR)${PREFIX}/sbin/
$(INSTALL) -m0755 probe-bcache bcache-register $(DESTDIR)$(UDEVLIBDIR)/
$(INSTALL) -m0644 69-bcache.rules $(DESTDIR)$(UDEVLIBDIR)/rules.d/
-$(INSTALL) -T -m0755 initramfs/hook $(DESTDIR)/usr/share/initramfs-tools/hooks/bcache
@ -19,7 +19,7 @@ install: make-bcache probe-bcache bcache-super-show
# $(INSTALL) -m0755 bcache-test $(DESTDIR)${PREFIX}/sbin/
clean:
$(RM) -f make-bcache probe-bcache bcache-super-show bcache-test *.o
$(RM) -f make-bcache probe-bcache bcache-super-show bcache-test bcachectl *.o
bcache-test: LDLIBS += `pkg-config --libs openssl`
make-bcache: LDLIBS += `pkg-config --libs uuid blkid`
@ -30,3 +30,4 @@ probe-bcache: CFLAGS += `pkg-config --cflags uuid blkid`
bcache-super-show: LDLIBS += `pkg-config --libs uuid`
bcache-super-show: CFLAGS += -std=gnu99
bcache-super-show: bcache.o
bcachectl: bcachectl.o

5
Makefile.am
View File

@ -7,7 +7,8 @@ AM_CFLAGS=-O2 -Wall -g -std=gnu99
bin_PROGRAMS=make-bcache \
probe-bcache \
bcache-super-show
bcache-super-show \
bcachectl
noinst_PROGRAMS=bcache-test
@ -23,6 +24,8 @@ bcache_super_show_SOURCES=bcache-super-show.c bcache.c
bcache_super_show_LDFLAGS=`pkg-config --libs uuid`
bcache_super_show_CFLAGS=$(AM_CFLAGS) `pkg-config --cflags uuid`
bcachectl_SOURCES=bcachectl.c
bcache_test_SOURCE=bcache-test.c
bcache_test_LDFLAGS=-lm `pkg-config --libs openssl`
bcache_test_CFLAGS=$(AM_CFLAGS) `pkg-config --cflags openssl`

51
bcachectl.c Normal file
View File

@ -0,0 +1,51 @@
#include <errno.h>
#include <fcntl.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <sys/ioctl.h>
#define __KERNEL__
#include <linux/bcache-ioctl.h>
#undef __KERNEL__
int bcachefd;
static int register_devices(int argc, char *argv[])
{
int ret;
ret = ioctl(bcachefd, BCH_IOCTL_REGISTER, argv);
if (ret < 0) {
fprintf(stderr, "ioctl error %d", ret);
exit(EXIT_FAILURE);
}
return 0;
}
int main(int argc, char *argv[])
{
char *ioctl = argv[2];
if (argc < 3) {
fprintf(stderr, "Enter bcache device and an ioctl to issue\n");
exit(EXIT_FAILURE);
}
bcachefd = open(argv[1], O_RDWR);
if (bcachefd < 0) {
perror("Can't open bcache device");
exit(EXIT_FAILURE);
}
argc -= 3;
argv += 3;
if (!strcmp(ioctl, "register_devices"))
return register_devices(argc, argv);
else {
fprintf(stderr, "Unknown ioctl\n");
exit(EXIT_FAILURE);
}
}