lkml.org 
[lkml]   [2007]   [Nov]   [14]   [last100]   RSS Feed
Views: [more markup]  [less markup]  [headers]  [forward] 
 
Messages in this thread
/
FromKumar Gala <>
Subjectgeneric_setlease and tmpfs -- LTP fcntl failure
DateWed, 14 Nov 2007 15:19:31 -0600
In debugging a LTP failure related to fcntl on tmpfs it appears that  
we aren't able to use fcntl(fd, F_SETLEASE, F_WRLCK).  In the  
debugging it looks like we artificial increase the dentry->d_count  
and so generic_setlease() always fails with -EAGAIN since it appears  
dentry->d_count will be 2.

This is my first time delving into fs code so I'm not that familiar  
with why tmpfs is artificially increasing the d_count.  I was  
wondering what a possible solution would be.

Maybe something like:

shmem_setlease(...) {
	if (arg == F_WRLCK) {
		dput(dentry)
		generic_setlease(...)
		dget(dentry)
	} else {
		generic_setlease(...)
	}
}
Not sure what harm doing the dput() / dget() will have.

- k
-
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@vger.kernel.org
More majordomo info at  http://vger.kernel.org/majordomo-info.html
Please read the FAQ at  http://www.tux.org/lkml/

\
 
 \ /
  Last update: 2007-11-14 22:21    [from the cache]
©2003-2008