Hi all,
I have format block device with XFS as follows.
root@node2:~# mkfs.xfs -f -r rtdev=/dev/sda3 /dev/sda4
meta-data=/dev/sda4 isize=256 agcount=4, agsize=56122440 blks
= sectsz=512 attr=2, projid32bit=0
data = bsize=4096 blocks=224489757, imaxpct=25
= sunit=0 swidth=0 blks
naming =version 2 bsize=4096 ascii-ci=0
log =internal log bsize=4096 blocks=109614, version=2
= sectsz=512 sunit=0 blks, lazy-count=1
realtime =/dev/sda3 extsz=4096 blocks=14865657,
rtextents=14865657
And I also write user-space codes as follows.
root@node2:~/test# cat xfs.c
#include <stdio.h>
#include <unistd.h>
#include <sys/types.h>
#include <sys/stat.h>
#include <fcntl.h>
#include <xfs/xfs.h>
#include <xfs/xfs_fs.h>
int main(int argc, char **argv) {
int fd;
int xfs_ret = 0;
fd = open("./1", O_RDWR);
if (fd < 0) {
fprintf(stderr, "open error!\n");
return -1;
}
xfs_ret = xfsctl("./1", fd, XFS_IOC_FSGETXATTR, NULL);
return 0;
}
Now, I am wondering how to feel the real time feature of XFS from userspace?
Could anyone please give me some suggestions? Thanks in advance.
--
Thanks
Weiwei Jia (Harry Wei)
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