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posix_acl: Add set_posix_acl

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Factor out part of posix_acl_xattr_set into a common function that takes
a posix_acl, which nfsd can also call.

The prototype already exists in include/linux/posix_acl.h.

Signed-off-by: Andreas Gruenbacher <agruenba@redhat.com>
Cc: stable@vger.kernel.org
Cc: Christoph Hellwig <hch@infradead.org>
Cc: Al Viro <viro@zeniv.linux.org.uk>
Signed-off-by: J. Bruce Fields <bfields@redhat.com>
This commit is contained in:
Andreas Gruenbacher 2016-06-22 23:57:25 +02:00 committed by J. Bruce Fields
parent 8c7245abda
commit 485e71e8fb
1 changed files with 23 additions and 19 deletions
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42
fs/posix_acl.c
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@ -820,6 +820,28 @@ posix_acl_xattr_get(const struct xattr_handler *handler,
return error;
}
int
set_posix_acl(struct inode *inode, int type, struct posix_acl *acl)
{
if (!IS_POSIXACL(inode))
return -EOPNOTSUPP;
if (!inode->i_op->set_acl)
return -EOPNOTSUPP;
if (type == ACL_TYPE_DEFAULT && !S_ISDIR(inode->i_mode))
return acl ? -EACCES : 0;
if (!inode_owner_or_capable(inode))
return -EPERM;
if (acl) {
int ret = posix_acl_valid(acl);
if (ret)
return ret;
}
return inode->i_op->set_acl(inode, acl, type);
}
EXPORT_SYMBOL(set_posix_acl);
static int
posix_acl_xattr_set(const struct xattr_handler *handler,
struct dentry *unused, struct inode *inode,
@ -829,30 +851,12 @@ posix_acl_xattr_set(const struct xattr_handler *handler,
struct posix_acl *acl = NULL;
int ret;
if (!IS_POSIXACL(inode))
return -EOPNOTSUPP;
if (!inode->i_op->set_acl)
return -EOPNOTSUPP;
if (handler->flags == ACL_TYPE_DEFAULT && !S_ISDIR(inode->i_mode))
return value ? -EACCES : 0;
if (!inode_owner_or_capable(inode))
return -EPERM;
if (value) {
acl = posix_acl_from_xattr(&init_user_ns, value, size);
if (IS_ERR(acl))
return PTR_ERR(acl);
if (acl) {
ret = posix_acl_valid(acl);
if (ret)
goto out;
}
}
ret = inode->i_op->set_acl(inode, acl, handler->flags);
out:
ret = set_posix_acl(inode, handler->flags, acl);
posix_acl_release(acl);
return ret;
}