diff -urdbB linux-2.4.18-58/fs/ioctl.c linux-2.4.18-59/fs/ioctl.c
--- linux-2.4.18-58/fs/ioctl.c Fri Feb 9 11:29:44 2001
+++ linux-2.4.18-59/fs/ioctl.c Thu May 1 09:52:18 2003
@@ -39,6 +39,13 @@
return put_user(inode->i_sb->s_blocksize, (int *) arg);
case FIONREAD:
return put_user(inode->i_size - filp->f_pos, (int *) arg);
+
+ case FIOFLUSH:
+ write_inode_now(inode, 1);
+ invalidate_inode_buffers(inode);
+ invalidate_inode_pages(inode);
+ return 0;
+
}
if (filp->f_op && filp->f_op->ioctl)
return filp->f_op->ioctl(inode, filp, cmd, arg);
diff -urdbB linux-2.4.18-58/include/asm/ioctls.h linux-2.4.18-59/include/asm/ioctls.h
--- linux-2.4.18-58/include/asm-i386/ioctls.h Fri Jul 24 11:10:16 1998
+++ linux-2.4.18-59/include/asm-i386/ioctls.h Thu May 1 09:53:51 2003
@@ -32,6 +32,7 @@
#define TIOCGSOFTCAR 0x5419
#define TIOCSSOFTCAR 0x541A
#define FIONREAD 0x541B
+#define FIOFLUSH _IO('F', 1) /* flush a file out of the caches */
#define TIOCINQ FIONREAD
#define TIOCLINUX 0x541C
#define TIOCCONS 0x541D
On Wed, May 21, 2003 at 10:28:03AM -0700, Ross Biro wrote:
>
> Here's a patch against 2.4.18 that allows user space to flush a file
> from both the buffer cache and the page cache. The reason for flushing
> a file from the caches is to the read the file again to verify it made
> it to more permanent storage correctly. Someone may want to add
> similiar code to 2.5.
This came up at SGI some time ago and the right solution is _not_ a new
ioctl but fadvise(..., POSIX_FADV_DONTNEED). I'll submit a clean backport
once 2.4.21 is out (if that will ever happen)
On Wednesday 21 May 2003 19:38, Christoph Hellwig wrote:
Hi Christoph,
> This came up at SGI some time ago and the right solution is _not_ a new
> ioctl but fadvise(..., POSIX_FADV_DONTNEED). I'll submit a clean backport
could you please send it to me even 2.4.21 is not out? Thank you.
> once 2.4.21 is out (if that will ever happen)
ROTFL! :-)
ciao, Marc