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authorAlexey Dobriyan <adobriyan@gmail.com>2009-02-20 17:04:33 +0300
committerAlexey Dobriyan <adobriyan@gmail.com>2009-03-31 01:14:27 +0400
commit3dec7f59c370c7b58184d63293c3dc984d475840 (patch)
tree54df7ab53c1f625179e2b69c78b782b5a867363e /fs/proc/internal.h
parent09729a9919fdaf137995b0f19cbd401e22229cac (diff)
proc 1/2: do PDE usecounting even for ->read_proc, ->write_proc
struct proc_dir_entry::owner is going to be removed. Now it's only necessary to protect PDEs which are using ->read_proc, ->write_proc hooks. However, ->owner assignments are racy and make it very easy for someone to switch ->owner on live PDE (as some subsystems do) without fixing refcounts and so on. http://bugzilla.kernel.org/show_bug.cgi?id=12454 So, ->owner is on death row. Proxy file operations exist already (proc_file_operations), just bump usecount when necessary. Signed-off-by: Alexey Dobriyan <adobriyan@gmail.com>
Diffstat (limited to 'fs/proc/internal.h')
-rw-r--r--fs/proc/internal.h1
1 files changed, 1 insertions, 0 deletions
diff --git a/fs/proc/internal.h b/fs/proc/internal.h
index cd53ff838498..f6db9618a888 100644
--- a/fs/proc/internal.h
+++ b/fs/proc/internal.h
@@ -91,3 +91,4 @@ struct pde_opener {
int (*release)(struct inode *, struct file *);
struct list_head lh;
};
+void pde_users_dec(struct proc_dir_entry *pde);