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Commit 1c994a09 authored by Jeff Layton's avatar Jeff Layton
Browse files

locks: consolidate "nolease" routines 



GFS2 and NFS have setlease routines that always just return -EINVAL.
Turn that into a generic routine that can live in fs/libfs.c.

Cc: <linux-nfs@vger.kernel.org>
Cc: Steven Whitehouse <swhiteho@redhat.com>
Cc: <cluster-devel@redhat.com>
Signed-off-by: default avatarJeff Layton <jlayton@primarydata.com>
Acked-by: default avatarTrond Myklebust <trond.myklebust@primarydata.com>
Reviewed-by: default avatarChristoph Hellwig <hch@lst.de>
parent 699688a4

fs/gfs2/file.c

+1 −21
Original line number Diff line number Diff line
@@ -912,26 +912,6 @@ static long gfs2_fallocate(struct file *file, int mode, loff_t offset, 


#ifdef CONFIG_GFS2_FS_LOCKING_DLM



/**

 * gfs2_setlease - acquire/release a file lease

 * @file: the file pointer

 * @arg: lease type

 * @fl: file lock

 *

 * We don't currently have a way to enforce a lease across the whole

 * cluster; until we do, disable leases (by just returning -EINVAL),

 * unless the administrator has requested purely local locking.

 *

 * Locking: called under i_lock

 *

 * Returns: errno

 */



static int gfs2_setlease(struct file *file, long arg, struct file_lock **fl)

{

	return -EINVAL;

}



/**

 * gfs2_lock - acquire/release a posix lock on a file

 * @file: the file pointer
@@ -1069,7 +1049,7 @@ const struct file_operations gfs2_file_fops = { 
	.flock		= gfs2_flock,

	.splice_read	= generic_file_splice_read,

	.splice_write	= iter_file_splice_write,

	.setlease	= gfs2_setlease,

	.setlease	= simple_nosetlease,

	.fallocate	= gfs2_fallocate,

};

fs/libfs.c

+16 −0
Original line number Diff line number Diff line
@@ -1075,3 +1075,19 @@ struct inode *alloc_anon_inode(struct super_block *s) 
	return inode;

}

EXPORT_SYMBOL(alloc_anon_inode);



/**

 * simple_nosetlease - generic helper for prohibiting leases

 * @filp: file pointer

 * @arg: type of lease to obtain

 * @flp: new lease supplied for insertion

 *

 * Generic helper for filesystems that do not wish to allow leases to be set.

 * All arguments are ignored and it just returns -EINVAL.

 */

int

simple_nosetlease(struct file *filp, long arg, struct file_lock **flp)

{

	return -EINVAL;

}

EXPORT_SYMBOL(simple_nosetlease);

fs/nfs/file.c

+1 −12
Original line number Diff line number Diff line
@@ -891,17 +891,6 @@ int nfs_flock(struct file *filp, int cmd, struct file_lock *fl) 
}

EXPORT_SYMBOL_GPL(nfs_flock);



/*

 * There is no protocol support for leases, so we have no way to implement

 * them correctly in the face of opens by other clients.

 */

int nfs_setlease(struct file *file, long arg, struct file_lock **fl)

{

	dprintk("NFS: setlease(%pD2, arg=%ld)\n", file, arg);

	return -EINVAL;

}

EXPORT_SYMBOL_GPL(nfs_setlease);



const struct file_operations nfs_file_operations = {

	.llseek		= nfs_file_llseek,

	.read		= new_sync_read,
@@ -918,6 +907,6 @@ const struct file_operations nfs_file_operations = { 
	.splice_read	= nfs_file_splice_read,

	.splice_write	= iter_file_splice_write,

	.check_flags	= nfs_check_flags,

	.setlease	= nfs_setlease,

	.setlease	= simple_nosetlease,

};

EXPORT_SYMBOL_GPL(nfs_file_operations);

fs/nfs/internal.h

+0 −1
Original line number Diff line number Diff line
@@ -346,7 +346,6 @@ int nfs_file_release(struct inode *, struct file *); 
int nfs_lock(struct file *, int, struct file_lock *);

int nfs_flock(struct file *, int, struct file_lock *);

int nfs_check_flags(int);

int nfs_setlease(struct file *, long, struct file_lock **);



/* inode.c */

extern struct workqueue_struct *nfsiod_workqueue;

fs/nfs/nfs4file.c

+1 −1
Original line number Diff line number Diff line
@@ -131,5 +131,5 @@ const struct file_operations nfs4_file_operations = { 
	.splice_read	= nfs_file_splice_read,

	.splice_write	= iter_file_splice_write,

	.check_flags	= nfs_check_flags,

	.setlease	= nfs_setlease,

	.setlease	= simple_nosetlease,

};