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[PATCH] do namei_flags calculation inside open_namei()

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My end goal here is to make sure all users of may_open()
return filps.  This will ensure that we properly release
mount write counts which were taken for the filp in
may_open().

This patch moves the sys_open flags to namei flags
calculation into fs/namei.c.  We'll shortly be moving
the nameidata_to_filp() calls into namei.c, and this
gets the sys_open flags to a place where we can get
at them when we need them.

Acked-by: Al Viro <[email protected]>
Signed-off-by: Christoph Hellwig <[email protected]>
Signed-off-by: Dave Hansen <[email protected]>
Signed-off-by: Al Viro <[email protected]>
This commit is contained in:
Dave Hansen 2008-02-15 14:37:27 -08:00 • committed by Al Viro
commit d57999e152
2 changed files with 36 additions and 29 deletions
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22
fs/open.c
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@ -796,31 +796,13 @@ cleanup_file:
return ERR_PTR(error);
}
/*
* Note that while the flag value (low two bits) for sys_open means:
* 00 - read-only
* 01 - write-only
* 10 - read-write
* 11 - special
* it is changed into
* 00 - no permissions needed
* 01 - read-permission
* 10 - write-permission
* 11 - read-write
* for the internal routines (ie open_namei()/follow_link() etc). 00 is
* used by symlinks.
*/
static struct file *do_filp_open(int dfd, const char *filename, int flags,
int mode)
{
int namei_flags, error;
int error;
struct nameidata nd;
namei_flags = flags;
if ((namei_flags+1) & O_ACCMODE)
namei_flags++;
error = open_namei(dfd, filename, namei_flags, mode, &nd);
error = open_namei(dfd, filename, flags, mode, &nd);
if (!error)
return nameidata_to_filp(&nd, flags);