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Commit 73598611 authored by Nick Piggin's avatar Nick Piggin
Browse files

ext2,3,4: provide simple rcu-walk ACL implementation 



This simple implementation just checks for no ACLs on the inode, and
if so, then the rcu-walk may proceed, otherwise fail it.

Signed-off-by: default avatarNick Piggin <npiggin@kernel.dk>
parent 1e1743eb

fs/ext2/acl.c

+5 −2
Original line number Diff line number Diff line
@@ -236,8 +236,11 @@ ext2_check_acl(struct inode *inode, int mask, unsigned int flags) 
{

	struct posix_acl *acl;



	if (flags & IPERM_FLAG_RCU)

	if (flags & IPERM_FLAG_RCU) {

		if (!negative_cached_acl(inode, ACL_TYPE_ACCESS))

			return -ECHILD;

		return -EAGAIN;

	}



	acl = ext2_get_acl(inode, ACL_TYPE_ACCESS);

	if (IS_ERR(acl))

fs/ext3/acl.c

+5 −2
Original line number Diff line number Diff line
@@ -244,8 +244,11 @@ ext3_check_acl(struct inode *inode, int mask, unsigned int flags) 
{

	struct posix_acl *acl;



	if (flags & IPERM_FLAG_RCU)

	if (flags & IPERM_FLAG_RCU) {

		if (!negative_cached_acl(inode, ACL_TYPE_ACCESS))

			return -ECHILD;

		return -EAGAIN;

	}



	acl = ext3_get_acl(inode, ACL_TYPE_ACCESS);

	if (IS_ERR(acl))

fs/ext4/acl.c

+5 −2
Original line number Diff line number Diff line
@@ -242,8 +242,11 @@ ext4_check_acl(struct inode *inode, int mask, unsigned int flags) 
{

	struct posix_acl *acl;



	if (flags & IPERM_FLAG_RCU)

	if (flags & IPERM_FLAG_RCU) {

		if (!negative_cached_acl(inode, ACL_TYPE_ACCESS))

			return -ECHILD;

		return -EAGAIN;

	}



	acl = ext4_get_acl(inode, ACL_TYPE_ACCESS);

	if (IS_ERR(acl))