Messages in this thread | | | Date | Fri, 09 May 2003 11:27:03 +0200 (MEST) | From | Ralf Oehler <> | Subject | missing get_empty_inode() |
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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
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