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authorDave Hansen <haveblue@us.ibm.com>2008-02-15 14:37:31 -0800
committerAl Viro <viro@zeniv.linux.org.uk>2008-04-19 00:25:32 -0400
commitaceaf78da92a53f5e1b105649a1b8c0afdb2135c (patch)
treecab04e05f8b504b0a11d4986045bc3b08a3a1e75 /include/linux/file.h
parent8366025eb80dfa0d8d94b286d53027081c280ef1 (diff)
[PATCH] r/o bind mounts: create helper to drop file write access
If someone decides to demote a file from r/w to just r/o, they can use this same code as __fput(). NFS does just that, and will use this in the next patch. AV: drop write access in __fput() only after we evict from file list. Signed-off-by: Dave Hansen <haveblue@us.ibm.com> Cc: Erez Zadok <ezk@cs.sunysb.edu> Cc: Trond Myklebust <trond.myklebust@fys.uio.no> Cc: "J Bruce Fields" <bfields@fieldses.org> Acked-by: Al Viro <viro@ZenIV.linux.org.uk> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Christoph Hellwig <hch@lst.de> Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
Diffstat (limited to 'include/linux/file.h')
-rw-r--r--include/linux/file.h1
1 files changed, 1 insertions, 0 deletions
diff --git a/include/linux/file.h b/include/linux/file.h
index 7239baac81a9..653477021e4c 100644
--- a/include/linux/file.h
+++ b/include/linux/file.h
@@ -61,6 +61,7 @@ extern struct kmem_cache *filp_cachep;
extern void __fput(struct file *);
extern void fput(struct file *);
+extern void drop_file_write_access(struct file *file);
struct file_operations;
struct vfsmount;