Messages in this thread | | | From | Kumar Gala <> | Subject | generic_setlease and tmpfs -- LTP fcntl failure | Date | Wed, 14 Nov 2007 15:19:31 -0600 |
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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.
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