Commit 73598611 authored Jan 07, 2011 by Nick Piggin

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: Nick 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))