evie/android_kernel_oneplus_msm8998
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pull handling of . and .. into inlined helper

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getting LOOKUP_RCU checks out of link_path_walk()...

Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
This commit is contained in:
Al Viro 2011-03-04 14:22:06 -05:00
parent 7bc055d1d5
commit 9856fa1b28
1 changed files with 16 additions and 14 deletions
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30
fs/namei.c
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@ -1318,6 +1318,18 @@ static inline int may_lookup(struct nameidata *nd)
return exec_permission(nd->inode, 0); return exec_permission(nd->inode, 0);
} }
static inline int handle_dots(struct nameidata *nd, int type)
{
if (type == LAST_DOTDOT) {
if (nd->flags & LOOKUP_RCU) {
if (follow_dotdot_rcu(nd))
return -ECHILD;
} else
follow_dotdot(nd);
}
return 0;
}
/* /*
* Name resolution. * Name resolution.
* This is the basic name resolution function, turning a pathname into * This is the basic name resolution function, turning a pathname into
@ -1393,13 +1405,8 @@ static int link_path_walk(const char *name, struct nameidata *nd)
* parent relationships. * parent relationships.
*/ */
if (unlikely(type != LAST_NORM)) { if (unlikely(type != LAST_NORM)) {
if (type == LAST_DOTDOT) { if (handle_dots(nd, type))
if (nd->flags & LOOKUP_RCU) { return -ECHILD;
if (follow_dotdot_rcu(nd))
return -ECHILD;
} else
follow_dotdot(nd);
}
continue; continue;
} }
@ -1434,13 +1441,8 @@ last_component:
if (lookup_flags & LOOKUP_PARENT) if (lookup_flags & LOOKUP_PARENT)
goto lookup_parent; goto lookup_parent;
if (unlikely(type != LAST_NORM)) { if (unlikely(type != LAST_NORM)) {
if (type == LAST_DOTDOT) { if (handle_dots(nd, type))
if (nd->flags & LOOKUP_RCU) { return -ECHILD;
if (follow_dotdot_rcu(nd))
return -ECHILD;
} else
follow_dotdot(nd);
}
return 0; return 0;
} }
err = do_lookup(nd, &this, &next, &inode); err = do_lookup(nd, &this, &next, &inode);