lkml.org 
[lkml]   [2003]   [May]   [9]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
 
Messages in this thread
/
Date
From
Subjectmissing get_empty_inode()
Hello, list

Currently I'm porting my driver sources from 2.4.18 to 2.4.20 an I noticed
the absence of get_empty_inode().
I didn't find an exported function to get a sb-less inode.
My goal is to open sd- and an sg- devices in order to do
ioctl(send_scsi_cmd) on them. As my driver acts as a block device driver
(layered pseudo block device), there is no sb assigned to it.

What is, according to the current philosophy, the cleanest code-sniplet to

- open
- ioctl
- close

an sd-device ?
an sg-device ?

Currently (2.4.18), I do it like



open-sd:
dummy_inode = get_empty_inode();
init_special_inode( dummy_inode,
S_IFBLK | 0600,
kdev );
dummy_inode->i_bdev = bdev;
dummy_inode->i_dev = dummy_inode->i_rdev;
insert_inode_hash(dummy_inode);

close-sd:
def_blk_fops.release(dummy_inode, &dummy_filp);

ioctl-sd:
ioctl_by_bdev(dummy_inode->i_bdev, cmd, arg);




open-sg:
dummy_inode = get_empty_inode();
init_special_inode( dummy_inode,
S_IFCHR | 0600,
kdev );
dummy_inode->i_dev = dummy_inode->i_rdev;
dummy_dentry.d_inode = dummy_inode;
ret = init_private_file( dummy_file,
dummy_dentry,
FMODE_READ|FMODE_WRITE ); /* calls open() */
insert_inode_hash(dummy_inode);

close-sg:
dummy_file->f_op->release(dummy_inode, dummy_file);
fops_put(filp->f_op);
filp->f_dentry = NULL;
dummy_inode->i_state |= I_FREEING;
clear_inode(dummy_inode);
dummy_inode = NULL;

ioctl-sg:
filp->f_op->ioctl( dummy_inode, filp, cmd, arg );





Regards,
Ralf


--
--------------------------------------------------------------------------
| Ralf Oehler
|
| GDA - Gesellschaft fuer Digitale _/
| Archivierungstechnik mbH & CoKG _/
| Ein Unternehmen der Bechtle AG #/_/_/_/ _/_/_/_/ _/_/_/_/
| _/ _/ _/ _/ _/
| E-Mail: R.Oehler@GDAmbH.com _/ _/ _/ _/ _/ _/
| Tel.: +49 6182-9271-23 _/_/_/_/ _/_/_/#/ _/_/_/#/
| Fax.: +49 6182-25035 _/
| Mail: GDA, Bensbruchstraße 11, _/_/_/_/
| D-63533 Mainhausen
| HTTP: www.GDAmbH.com
--------------------------------------------------------------------------

time is a funny concept








[unhandled content-type:application/pgp-signature]
\
 
 \ /
  Last update: 2005-03-22 13:35    [W:0.031 / U:0.060 seconds]
©2003-2020 Jasper Spaans|hosted at Digital Ocean and TransIP|Read the blog|Advertise on this site