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Hello:
Everyone,I want to port WinApi DeviceIoControl to Linux Ioctl.

//Windows
USHORT in = COMPRESSION_FORMAT_DEFAULT;
DWORD cbReturned; 
DeviceIoControl(hDevice,FSCTL_SET_COMPRESSION,&in,sizeof(in),NULL,0,&cbReturned,NULL);

//Linux
ioctl(hDevice,FSCTL_SET_COMPRESSION,&value)

But.I can not find FSCTL_SET_COMPRESSION in my Linux.

What is head name of FSCTL_SET_COMPRESSION?

http://lxr.free-electrons.com/source/fs/cifs/smbfsctl.h#L41[^]

What should i do? Thanks.

Hello how do i port DeviceIoControl(hDevice,FSCTL_SET_COMPRESSION,&in,sizeof(in),NULL,0,&cbReturned,NULL) to Linux Thanks.
Posted 24-Jun-13 0:42am
Edited 24-Jun-13 2:32am
v2

1 solution

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Solution 1

The answer is here:

int flags = 0;
ioctl(fd,FS_IOC_GETFLAGS,&flags);
flags |= FS_COMPR_FL;
flags &= ~FS_NOCOMP_FL;
ioctl(fd,FS_IOC_SETFLAGS,&flags);
Thanks!
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v2

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