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locks: rename lease functions to reflect locks.c conventions

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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: "J. Bruce Fields" <bfields@citi.umich.edu>
This commit is contained in:
J. Bruce Fields 2007-06-07 17:09:49 -04:00
parent 6d5e8b05ca
commit a9933cea7a
3 changed files with 13 additions and 14 deletions
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15
fs/locks.c
View file

@ -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;

10
fs/nfsd/nfs4state.c
View file

@ -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);

2
include/linux/fs.h
View file

@ -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);