[XFS] add a FMODE flag to make XFS invisible I/O less hacky
XFS has a mode called invisble I/O that doesn't update any of the
timestamps. It's used for HSM-style applications and exposed through
the nasty open by handle ioctl.
Instead of doing directly assignment of file operations that set an
internal flag for it add a new FMODE_NOCMTIME flag that we can check
in the normal file operations.
(addition of the generic VFS flag has been ACKed by Al as an interims
solution)
Signed-off-by: Christoph Hellwig <hch@lst.de>
Signed-off-by: Lachlan McIlroy <lachlan@sgi.com>
diff --git a/fs/xfs/linux-2.6/xfs_ioctl32.c b/fs/xfs/linux-2.6/xfs_ioctl32.c
index b34b3d8..0504cec 100644
--- a/fs/xfs/linux-2.6/xfs_ioctl32.c
+++ b/fs/xfs/linux-2.6/xfs_ioctl32.c
@@ -599,19 +599,24 @@
return error;
}
-STATIC long
-xfs_compat_ioctl(
- xfs_inode_t *ip,
- struct file *filp,
- int ioflags,
- unsigned cmd,
- void __user *arg)
+long
+xfs_file_compat_ioctl(
+ struct file *filp,
+ unsigned cmd,
+ unsigned long p)
{
- struct inode *inode = filp->f_path.dentry->d_inode;
- xfs_mount_t *mp = ip->i_mount;
- int error;
+ struct inode *inode = filp->f_path.dentry->d_inode;
+ struct xfs_inode *ip = XFS_I(inode);
+ struct xfs_mount *mp = ip->i_mount;
+ void __user *arg = (void __user *)p;
+ int ioflags = 0;
+ int error;
- xfs_itrace_entry(XFS_I(inode));
+ if (filp->f_mode & FMODE_NOCMTIME)
+ ioflags |= IO_INVIS;
+
+ xfs_itrace_entry(ip);
+
switch (cmd) {
/* No size or alignment issues on any arch */
case XFS_IOC_DIOINFO:
@@ -632,7 +637,7 @@
case XFS_IOC_GOINGDOWN:
case XFS_IOC_ERROR_INJECTION:
case XFS_IOC_ERROR_CLEARALL:
- return xfs_ioctl(ip, filp, ioflags, cmd, arg);
+ return xfs_file_ioctl(filp, cmd, p);
#ifndef BROKEN_X86_ALIGNMENT
/* These are handled fine if no alignment issues */
case XFS_IOC_ALLOCSP:
@@ -646,7 +651,7 @@
case XFS_IOC_FSGEOMETRY_V1:
case XFS_IOC_FSGROWFSDATA:
case XFS_IOC_FSGROWFSRT:
- return xfs_ioctl(ip, filp, ioflags, cmd, arg);
+ return xfs_file_ioctl(filp, cmd, p);
#else
case XFS_IOC_ALLOCSP_32:
case XFS_IOC_FREESP_32:
@@ -687,7 +692,7 @@
case XFS_IOC_SETXFLAGS_32:
case XFS_IOC_GETVERSION_32:
cmd = _NATIVE_IOC(cmd, long);
- return xfs_ioctl(ip, filp, ioflags, cmd, arg);
+ return xfs_file_ioctl(filp, cmd, p);
case XFS_IOC_SWAPEXT: {
struct xfs_swapext sxp;
struct compat_xfs_swapext __user *sxu = arg;
@@ -738,26 +743,3 @@
return -XFS_ERROR(ENOIOCTLCMD);
}
}
-
-long
-xfs_file_compat_ioctl(
- struct file *filp,
- unsigned int cmd,
- unsigned long p)
-{
- struct inode *inode = filp->f_path.dentry->d_inode;
-
- return xfs_compat_ioctl(XFS_I(inode), filp, 0, cmd, (void __user *)p);
-}
-
-long
-xfs_file_compat_invis_ioctl(
- struct file *filp,
- unsigned int cmd,
- unsigned long p)
-{
- struct inode *inode = filp->f_path.dentry->d_inode;
-
- return xfs_compat_ioctl(XFS_I(inode), filp, IO_INVIS, cmd,
- (void __user *)p);
-}