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[XFS] add a FMODE flag to make XFS invisible I/O less hacky

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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>
This commit is contained in:
Christoph Hellwig
2008-12-09 04:47:33 -05:00
committed by Lachlan McIlroy
parent 6d73cf133c
commit 4d4be482a4
7 changed files with 78 additions and 185 deletions
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12
fs/xfs/linux-2.6/xfs_ioctl.h
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@@ -67,16 +67,16 @@ xfs_attrmulti_attr_remove(
char *name,
__uint32_t flags);
extern long
xfs_file_ioctl(
struct file *filp,
unsigned int cmd,
unsigned long p);
extern long
xfs_file_compat_ioctl(
struct file *file,
unsigned int cmd,
unsigned long arg);
extern long
xfs_file_compat_invis_ioctl(
struct file *file,
unsigned int cmd,
unsigned long arg);
#endif