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Commit a9933cea authored by J. Bruce Fields's avatar J. Bruce Fields
Browse files

locks: rename lease functions to reflect locks.c conventions 



We've been using the convention that vfs_foo is the function that calls
a filesystem-specific foo method if it exists, or falls back on a
generic method if it doesn't; thus vfs_foo is what is called when some
other part of the kernel (normally lockd or nfsd) wants to get a lock,
whereas foo is what filesystems call to use the underlying local
functionality as part of their lock implementation.

So rename setlease to vfs_setlease (which will call a
filesystem-specific setlease after a later patch) and __setlease to
setlease.

Also, vfs_setlease need only be GPL-exported as long as it's only needed
by lockd and nfsd.

Signed-off-by: default avatar"J. Bruce Fields" <bfields@citi.umich.edu>
parent 6d5e8b05

fs/locks.c

+7 −8
Original line number Diff line number Diff line
@@ -1326,7 +1326,7 @@ int fcntl_getlease(struct file *filp) 
}



/**

 *	__setlease	-	sets a lease on an open file

 *	setlease	-	sets a lease on an open file

 *	@filp: file pointer

 *	@arg: type of lease to obtain

 *	@flp: input - file_lock to use, output - file_lock inserted
@@ -1336,7 +1336,7 @@ int fcntl_getlease(struct file *filp) 
 *

 *	Called with kernel lock held.

 */

static int __setlease(struct file *filp, long arg, struct file_lock **flp)

static int setlease(struct file *filp, long arg, struct file_lock **flp)

{

	struct file_lock *fl, **before, **my_before = NULL, *lease;

	struct dentry *dentry = filp->f_path.dentry;
@@ -1423,7 +1423,7 @@ out: 
}



 /**

 *	setlease        -       sets a lease on an open file

 *	vfs_setlease        -       sets a lease on an open file

 *	@filp: file pointer

 *	@arg: type of lease to obtain

 *	@lease: file_lock to use
@@ -1432,18 +1432,17 @@ out: 
 *	The fl_lmops fl_break function is required by break_lease

 */



int setlease(struct file *filp, long arg, struct file_lock **lease)

int vfs_setlease(struct file *filp, long arg, struct file_lock **lease)

{

	int error;



	lock_kernel();

	error = __setlease(filp, arg, lease);

	error = setlease(filp, arg, lease);

	unlock_kernel();



	return error;

}



EXPORT_SYMBOL(setlease);

EXPORT_SYMBOL_GPL(vfs_setlease);



/**

 *	fcntl_setlease	-	sets a lease on an open file
@@ -1469,7 +1468,7 @@ int fcntl_setlease(unsigned int fd, struct file *filp, long arg) 


	lock_kernel();



	error = __setlease(filp, arg, &flp);

	error = vfs_setlease(filp, arg, &flp);

	if (error || arg == F_UNLCK)

		goto out_unlock;

fs/nfsd/nfs4state.c

+5 −5
Original line number Diff line number Diff line
@@ -256,7 +256,7 @@ nfs4_close_delegation(struct nfs4_delegation *dp) 
	/* The following nfsd_close may not actually close the file,

	 * but we want to remove the lease in any case. */

	if (dp->dl_flock)

		setlease(filp, F_UNLCK, &dp->dl_flock);

		vfs_setlease(filp, F_UNLCK, &dp->dl_flock);

	nfsd_close(filp);

}
@@ -1402,7 +1402,7 @@ void nfsd_release_deleg_cb(struct file_lock *fl) 
/*

 * Set the delegation file_lock back pointer.

 *

 * Called from __setlease() with lock_kernel() held.

 * Called from setlease() with lock_kernel() held.

 */

static

void nfsd_copy_lock_deleg_cb(struct file_lock *new, struct file_lock *fl)
@@ -1416,7 +1416,7 @@ void nfsd_copy_lock_deleg_cb(struct file_lock *new, struct file_lock *fl) 
}



/*

 * Called from __setlease() with lock_kernel() held

 * Called from setlease() with lock_kernel() held

 */

static

int nfsd_same_client_deleg_cb(struct file_lock *onlist, struct file_lock *try)
@@ -1716,10 +1716,10 @@ nfs4_open_delegation(struct svc_fh *fh, struct nfsd4_open *open, struct nfs4_sta 
	fl.fl_file = stp->st_vfs_file;

	fl.fl_pid = current->tgid;



	/* setlease checks to see if delegation should be handed out.

	/* vfs_setlease checks to see if delegation should be handed out.

	 * the lock_manager callbacks fl_mylease and fl_change are used

	 */

	if ((status = setlease(stp->st_vfs_file,

	if ((status = vfs_setlease(stp->st_vfs_file,

		flag == NFS4_OPEN_DELEGATE_READ? F_RDLCK: F_WRLCK, &flp))) {

		dprintk("NFSD: setlease failed [%d], no delegation\n", status);

		unhash_delegation(dp);

include/linux/fs.h

+1 −1
Original line number Diff line number Diff line
@@ -872,7 +872,7 @@ extern int vfs_cancel_lock(struct file *filp, struct file_lock *fl); 
extern int flock_lock_file_wait(struct file *filp, struct file_lock *fl);

extern int __break_lease(struct inode *inode, unsigned int flags);

extern void lease_get_mtime(struct inode *, struct timespec *time);

extern int setlease(struct file *, long, struct file_lock **);

extern int vfs_setlease(struct file *, long, struct file_lock **);

extern int lease_modify(struct file_lock **, int);

extern int lock_may_read(struct inode *, loff_t start, unsigned long count);

extern int lock_may_write(struct inode *, loff_t start, unsigned long count);