From 4d4be482a4d78ca906f45e99fd9fdb91e907f5ad Mon Sep 17 00:00:00 2001 From: Christoph Hellwig Date: Tue, 9 Dec 2008 04:47:33 -0500 Subject: [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 Signed-off-by: Lachlan McIlroy --- fs/xfs/linux-2.6/xfs_file.c | 145 ++++++-------------------------------------- 1 file changed, 20 insertions(+), 125 deletions(-) (limited to 'fs/xfs/linux-2.6/xfs_file.c') diff --git a/fs/xfs/linux-2.6/xfs_file.c b/fs/xfs/linux-2.6/xfs_file.c index f999d20a429..a0c45cc8a6b 100644 --- a/fs/xfs/linux-2.6/xfs_file.c +++ b/fs/xfs/linux-2.6/xfs_file.c @@ -45,80 +45,44 @@ static struct vm_operations_struct xfs_file_vm_ops; -STATIC_INLINE ssize_t -__xfs_file_read( +STATIC ssize_t +xfs_file_aio_read( struct kiocb *iocb, const struct iovec *iov, unsigned long nr_segs, - int ioflags, loff_t pos) { struct file *file = iocb->ki_filp; + int ioflags = IO_ISAIO; BUG_ON(iocb->ki_pos != pos); if (unlikely(file->f_flags & O_DIRECT)) ioflags |= IO_ISDIRECT; + if (file->f_mode & FMODE_NOCMTIME) + ioflags |= IO_INVIS; return xfs_read(XFS_I(file->f_path.dentry->d_inode), iocb, iov, nr_segs, &iocb->ki_pos, ioflags); } STATIC ssize_t -xfs_file_aio_read( - struct kiocb *iocb, - const struct iovec *iov, - unsigned long nr_segs, - loff_t pos) -{ - return __xfs_file_read(iocb, iov, nr_segs, IO_ISAIO, pos); -} - -STATIC ssize_t -xfs_file_aio_read_invis( - struct kiocb *iocb, - const struct iovec *iov, - unsigned long nr_segs, - loff_t pos) -{ - return __xfs_file_read(iocb, iov, nr_segs, IO_ISAIO|IO_INVIS, pos); -} - -STATIC_INLINE ssize_t -__xfs_file_write( +xfs_file_aio_write( struct kiocb *iocb, const struct iovec *iov, unsigned long nr_segs, - int ioflags, loff_t pos) { - struct file *file = iocb->ki_filp; + struct file *file = iocb->ki_filp; + int ioflags = IO_ISAIO; BUG_ON(iocb->ki_pos != pos); if (unlikely(file->f_flags & O_DIRECT)) ioflags |= IO_ISDIRECT; + if (file->f_mode & FMODE_NOCMTIME) + ioflags |= IO_INVIS; return xfs_write(XFS_I(file->f_mapping->host), iocb, iov, nr_segs, &iocb->ki_pos, ioflags); } -STATIC ssize_t -xfs_file_aio_write( - struct kiocb *iocb, - const struct iovec *iov, - unsigned long nr_segs, - loff_t pos) -{ - return __xfs_file_write(iocb, iov, nr_segs, IO_ISAIO, pos); -} - -STATIC ssize_t -xfs_file_aio_write_invis( - struct kiocb *iocb, - const struct iovec *iov, - unsigned long nr_segs, - loff_t pos) -{ - return __xfs_file_write(iocb, iov, nr_segs, IO_ISAIO|IO_INVIS, pos); -} - STATIC ssize_t xfs_file_splice_read( struct file *infilp, @@ -127,20 +91,13 @@ xfs_file_splice_read( size_t len, unsigned int flags) { - return xfs_splice_read(XFS_I(infilp->f_path.dentry->d_inode), - infilp, ppos, pipe, len, flags, 0); -} + int ioflags = 0; + + if (infilp->f_mode & FMODE_NOCMTIME) + ioflags |= IO_INVIS; -STATIC ssize_t -xfs_file_splice_read_invis( - struct file *infilp, - loff_t *ppos, - struct pipe_inode_info *pipe, - size_t len, - unsigned int flags) -{ return xfs_splice_read(XFS_I(infilp->f_path.dentry->d_inode), - infilp, ppos, pipe, len, flags, IO_INVIS); + infilp, ppos, pipe, len, flags, ioflags); } STATIC ssize_t @@ -151,20 +108,13 @@ xfs_file_splice_write( size_t len, unsigned int flags) { - return xfs_splice_write(XFS_I(outfilp->f_path.dentry->d_inode), - pipe, outfilp, ppos, len, flags, 0); -} + int ioflags = 0; + + if (outfilp->f_mode & FMODE_NOCMTIME) + ioflags |= IO_INVIS; -STATIC ssize_t -xfs_file_splice_write_invis( - struct pipe_inode_info *pipe, - struct file *outfilp, - loff_t *ppos, - size_t len, - unsigned int flags) -{ return xfs_splice_write(XFS_I(outfilp->f_path.dentry->d_inode), - pipe, outfilp, ppos, len, flags, IO_INVIS); + pipe, outfilp, ppos, len, flags, ioflags); } STATIC int @@ -275,42 +225,6 @@ xfs_file_mmap( return 0; } -STATIC long -xfs_file_ioctl( - struct file *filp, - unsigned int cmd, - unsigned long p) -{ - struct inode *inode = filp->f_path.dentry->d_inode; - - - /* NOTE: some of the ioctl's return positive #'s as a - * byte count indicating success, such as - * readlink_by_handle. So we don't "sign flip" - * like most other routines. This means true - * errors need to be returned as a negative value. - */ - return xfs_ioctl(XFS_I(inode), filp, 0, cmd, (void __user *)p); -} - -STATIC long -xfs_file_ioctl_invis( - struct file *filp, - unsigned int cmd, - unsigned long p) -{ - struct inode *inode = filp->f_path.dentry->d_inode; - - - /* NOTE: some of the ioctl's return positive #'s as a - * byte count indicating success, such as - * readlink_by_handle. So we don't "sign flip" - * like most other routines. This means true - * errors need to be returned as a negative value. - */ - return xfs_ioctl(XFS_I(inode), filp, IO_INVIS, cmd, (void __user *)p); -} - /* * mmap()d file has taken write protection fault and is being made * writable. We can set the page state up correctly for a writable @@ -346,25 +260,6 @@ const struct file_operations xfs_file_operations = { #endif }; -const struct file_operations xfs_invis_file_operations = { - .llseek = generic_file_llseek, - .read = do_sync_read, - .write = do_sync_write, - .aio_read = xfs_file_aio_read_invis, - .aio_write = xfs_file_aio_write_invis, - .splice_read = xfs_file_splice_read_invis, - .splice_write = xfs_file_splice_write_invis, - .unlocked_ioctl = xfs_file_ioctl_invis, -#ifdef CONFIG_COMPAT - .compat_ioctl = xfs_file_compat_invis_ioctl, -#endif - .mmap = xfs_file_mmap, - .open = xfs_file_open, - .release = xfs_file_release, - .fsync = xfs_file_fsync, -}; - - const struct file_operations xfs_dir_file_operations = { .open = xfs_dir_open, .read = generic_read_dir, -- cgit v1.2.3