locks: share more common lease code

Share more code between setlease (used by nfsd) and fcntl.

Also some minor cleanup.

Signed-off-by: "J. Bruce Fields" <bfields@citi.umich.edu>
Acked-by: Christoph Hellwig <hch@infradead.org>

diff --git a/fs/locks.c b/fs/locks.c
index 838ca54..0e5873b 100644 (file)
--- a/fs/locks.c
+++ b/fs/locks.c
@@ -1343,6 +1343,14 @@ static int __setlease(struct file *filp, long arg, struct file_lock **flp)
        struct inode *inode = dentry->d_inode;
        int error, rdlease_count = 0, wrlease_count = 0;
 
+       if ((current->fsuid != inode->i_uid) && !capable(CAP_LEASE))
+               return -EACCES;
+       if (!S_ISREG(inode->i_mode))
+               return -EINVAL;
+       error = security_file_lock(filp, arg);
+       if (error)
+               return error;
+
        time_out_leases(inode);
 
        BUG_ON(!(*flp)->fl_lmops->fl_break);
@@ -1426,18 +1434,8 @@ out:
 
 int setlease(struct file *filp, long arg, struct file_lock **lease)
 {
-       struct dentry *dentry = filp->f_path.dentry;
-       struct inode *inode = dentry->d_inode;
        int error;
 
-       if ((current->fsuid != inode->i_uid) && !capable(CAP_LEASE))
-               return -EACCES;
-       if (!S_ISREG(inode->i_mode))
-               return -EINVAL;
-       error = security_file_lock(filp, arg);
-       if (error)
-               return error;
-
        lock_kernel();
        error = __setlease(filp, arg, lease);
        unlock_kernel();
@@ -1464,14 +1462,6 @@ int fcntl_setlease(unsigned int fd, struct file *filp, long arg)
        struct inode *inode = dentry->d_inode;
        int error;
 
-       if ((current->fsuid != inode->i_uid) && !capable(CAP_LEASE))
-               return -EACCES;
-       if (!S_ISREG(inode->i_mode))
-               return -EINVAL;
-       error = security_file_lock(filp, arg);
-       if (error)
-               return error;
-
        locks_init_lock(&fl);
        error = lease_init(filp, arg, &fl);
        if (error)
@@ -1485,9 +1475,9 @@ int fcntl_setlease(unsigned int fd, struct file *filp, long arg)
 
        error = fasync_helper(fd, filp, 1, &flp->fl_fasync);
        if (error < 0) {
-               /* remove lease just inserted by __setlease */
+               /* remove lease just inserted by setlease */
                flp->fl_type = F_UNLCK | F_INPROGRESS;
-               flp->fl_break_time = jiffies- 10;
+               flp->fl_break_time = jiffies - 10;
                time_out_leases(inode);
                goto out_unlock;
        }