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merge component type recognition

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no need to do it in three places...

Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
This commit is contained in:
Al Viro 2011-02-22 15:10:03 -05:00
parent e41f7d4ee5
commit fe479a580d
1 changed files with 22 additions and 26 deletions
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48
fs/namei.c
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@ -1362,6 +1362,7 @@ static int link_path_walk(const char *name, struct nameidata *nd)
unsigned long hash;
struct qstr this;
unsigned int c;
int type;
nd->flags |= LOOKUP_CONTINUE;
@ -1381,6 +1382,16 @@ static int link_path_walk(const char *name, struct nameidata *nd)
this.len = name - (const char *) this.name;
this.hash = end_name_hash(hash);
type = LAST_NORM;
if (this.name[0] == '.') switch (this.len) {
case 2:
if (this.name[1] == '.')
type = LAST_DOTDOT;
break;
case 1:
type = LAST_DOT;
}
/* remove trailing slashes? */
if (!c)
goto last_component;
@ -1393,21 +1404,17 @@ static int link_path_walk(const char *name, struct nameidata *nd)
* to be able to know about the current root directory and
* parent relationships.
*/
if (this.name[0] == '.') switch (this.len) {
default:
break;
case 2:
if (this.name[1] != '.')
break;
if (unlikely(type != LAST_NORM)) {
if (type == LAST_DOTDOT) {
if (nd->flags & LOOKUP_RCU) {
if (follow_dotdot_rcu(nd))
return -ECHILD;
} else
follow_dotdot(nd);
/* fallthrough */
case 1:
continue;
}
continue;
}
/* This does the actual lookups.. */
err = do_lookup(nd, &this, &next, &inode);
if (err)
@ -1441,20 +1448,15 @@ static int link_path_walk(const char *name, struct nameidata *nd)
nd->flags &= lookup_flags | ~LOOKUP_CONTINUE;
if (lookup_flags & LOOKUP_PARENT)
goto lookup_parent;
if (this.name[0] == '.') switch (this.len) {
default:
break;
case 2:
if (this.name[1] != '.')
break;
if (unlikely(type != LAST_NORM)) {
if (type == LAST_DOTDOT) {
if (nd->flags & LOOKUP_RCU) {
if (follow_dotdot_rcu(nd))
return -ECHILD;
} else
follow_dotdot(nd);
/* fallthrough */
case 1:
goto return_reval;
}
goto return_reval;
}
err = do_lookup(nd, &this, &next, &inode);
if (err)
@ -1480,14 +1482,8 @@ static int link_path_walk(const char *name, struct nameidata *nd)
goto return_base;
lookup_parent:
nd->last = this;
nd->last_type = LAST_NORM;
if (this.name[0] != '.')
goto return_base;
if (this.len == 1)
nd->last_type = LAST_DOT;
else if (this.len == 2 && this.name[1] == '.')
nd->last_type = LAST_DOTDOT;
else
nd->last_type = type;
if (type == LAST_NORM)
goto return_base;
return_reval:
/*