* PATCH [7/10] lease interfaces for version 4 NFSD
@ 2004-09-20 20:23 William A.(Andy) Adamson
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From: William A.(Andy) Adamson @ 2004-09-20 20:23 UTC (permalink / raw)
To: linux-fsdevel; +Cc: andros
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VFS: use the inode i_writecount to test for handing out a F_RDLCK lease
Signed-off-by: Andy Adamson <andros@umich.edu>
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diff --recursive -puN old/fs/locks.c new/fs/locks.c
--- old/fs/locks.c 2004-09-20 13:56:25.385316000 -0400
+++ new/fs/locks.c 2004-09-20 14:15:31.144266000 -0400
@@ -1275,10 +1275,10 @@ int __setlease(struct file *filp, long a
if (!flp || !(*flp) || !(*flp)->fl_lmops || !(*flp)->fl_lmops->fl_break)
goto out;
- /*
- * FIXME: What about F_RDLCK and files open for writing?
- */
error = -EAGAIN;
+ if ((arg == F_RDLCK) && (atomic_read(&inode->i_writecount) > 0))
+ goto out;
+
if ((arg == F_WRLCK)
&& ((atomic_read(&dentry->d_count) > 1)
|| (atomic_read(&inode->i_count) > 1)))
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