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Commit 951c0d66 authored by Al Viro's avatar Al Viro
Browse files

get rid of boilerplate switches in posix_acl.h 



the only potentially subtle thing here: get_cached_acl()
is never called with the second argument other than
ACL_TYPE_{ACCESS,DEFAULT}.  IOW, that return ERR_PTR(-EINVAL)
in there might as well be BUG().

Signed-off-by: default avatarAl Viro <viro@zeniv.linux.org.uk>
parent da5aa861

include/linux/posix_acl.h

+20 −42
Original line number Diff line number Diff line
@@ -84,20 +84,22 @@ extern struct posix_acl *get_posix_acl(struct inode *, int); 
extern int set_posix_acl(struct inode *, int, struct posix_acl *);



#ifdef CONFIG_FS_POSIX_ACL

static inline struct posix_acl *get_cached_acl(struct inode *inode, int type)

static inline struct posix_acl **acl_by_type(struct inode *inode, int type)

{

	struct posix_acl **p, *acl;

	switch (type) {

	case ACL_TYPE_ACCESS:

		p = &inode->i_acl;

		break;

		return &inode->i_acl;

	case ACL_TYPE_DEFAULT:

		p = &inode->i_default_acl;

		break;

		return &inode->i_default_acl;

	default:

		return ERR_PTR(-EINVAL);

		BUG();

	}

}

	acl = ACCESS_ONCE(*p);



static inline struct posix_acl *get_cached_acl(struct inode *inode, int type)

{

	struct posix_acl **p = acl_by_type(inode, type);

	struct posix_acl *acl = ACCESS_ONCE(*p);

	if (acl) {

		spin_lock(&inode->i_lock);

		acl = *p;
@@ -110,18 +112,8 @@ static inline struct posix_acl *get_cached_acl(struct inode *inode, int type) 


static inline int negative_cached_acl(struct inode *inode, int type)

{

	struct posix_acl **p, *acl;

	switch (type) {

	case ACL_TYPE_ACCESS:

		p = &inode->i_acl;

		break;

	case ACL_TYPE_DEFAULT:

		p = &inode->i_default_acl;

		break;

	default:

		BUG();

	}

	acl = ACCESS_ONCE(*p);

	struct posix_acl **p = acl_by_type(inode, type);

	struct posix_acl *acl = ACCESS_ONCE(*p);

	if (acl)

		return 0;

	return 1;
@@ -131,18 +123,11 @@ static inline void set_cached_acl(struct inode *inode, 
				  int type,

				  struct posix_acl *acl)

{

	struct posix_acl *old = NULL;

	struct posix_acl **p = acl_by_type(inode, type);

	struct posix_acl *old;

	spin_lock(&inode->i_lock);

	switch (type) {

	case ACL_TYPE_ACCESS:

		old = inode->i_acl;

		inode->i_acl = posix_acl_dup(acl);

		break;

	case ACL_TYPE_DEFAULT:

		old = inode->i_default_acl;

		inode->i_default_acl = posix_acl_dup(acl);

		break;

	}

	old = *p;

	*p = posix_dup_acl(acl);

	spin_unlock(&inode->i_lock);

	if (old != ACL_NOT_CACHED)

		posix_acl_release(old);
@@ -150,18 +135,11 @@ static inline void set_cached_acl(struct inode *inode, 


static inline void forget_cached_acl(struct inode *inode, int type)

{

	struct posix_acl *old = NULL;

	struct posix_acl **p = acl_by_type(inode, type);

	struct posix_acl *old;

	spin_lock(&inode->i_lock);

	switch (type) {

	case ACL_TYPE_ACCESS:

		old = inode->i_acl;

		inode->i_acl = ACL_NOT_CACHED;

		break;

	case ACL_TYPE_DEFAULT:

		old = inode->i_default_acl;

		inode->i_default_acl = ACL_NOT_CACHED;

		break;

	}

	old = *p;

	*p = ACL_NOT_CACHED;

	spin_unlock(&inode->i_lock);

	if (old != ACL_NOT_CACHED)

		posix_acl_release(old);