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| author | Dave Hansen <haveblue@us.ibm.com> | 2008-02-15 14:37:31 -0800 |
|---|---|---|
| committer | Al Viro <viro@zeniv.linux.org.uk> | 2008-04-19 00:25:32 -0400 |
| commit | aceaf78da92a53f5e1b105649a1b8c0afdb2135c (patch) | |
| tree | cab04e05f8b504b0a11d4986045bc3b08a3a1e75 /include/linux/file.h | |
| parent | 8366025eb80dfa0d8d94b286d53027081c280ef1 (diff) | |
| download | lwn-aceaf78da92a53f5e1b105649a1b8c0afdb2135c.tar.gz lwn-aceaf78da92a53f5e1b105649a1b8c0afdb2135c.zip | |
[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.h | 1 |
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; |