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[PATCH] merge open_namei() and do_filp_open()

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open_namei() will, in the future, need to take mount write counts
over its creation and truncation (via may_open()) operations.  It
needs to keep these write counts until any potential filp that is
created gets __fput()'d.

This gets complicated in the error handling and becomes very murky
as to how far open_namei() actually got, and whether or not that
mount write count was taken.  That makes it a bad interface.

All that the current do_filp_open() really does is allocate the
nameidata on the stack, then call open_namei().

So, this merges those two functions and moves filp_open() over
to namei.c so it can be close to its buddy: do_filp_open().  It
also gets a kerneldoc comment in the process.

Acked-by: Al Viro <viro@ZenIV.linux.org.uk>
Signed-off-by: Christoph Hellwig <hch@lst.de>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Dave Hansen <haveblue@us.ibm.com>
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
This commit is contained in:
Christoph Hellwig 2008-02-15 14:37:28 -08:00 • committed by Al Viro
parent d57999e152
commit a70e65df88
3 changed files with 59 additions and 63 deletions
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19
fs/open.c
View file

@ -796,25 +796,6 @@ cleanup_file:
return ERR_PTR(error);
}
static struct file *do_filp_open(int dfd, const char *filename, int flags,
int mode)
{
int error;
struct nameidata nd;
error = open_namei(dfd, filename, flags, mode, &nd);
if (!error)
return nameidata_to_filp(&nd, flags);
return ERR_PTR(error);
}
struct file *filp_open(const char *filename, int flags, int mode)
{
return do_filp_open(AT_FDCWD, filename, flags, mode);
}
EXPORT_SYMBOL(filp_open);
/**
* lookup_instantiate_filp - instantiates the open intent filp
* @nd: pointer to nameidata