int
xfs_check_acl(struct inode *inode, int mask, unsigned int flags)
{
struct xfs_inode *ip;
struct posix_acl *acl;
int error = -EAGAIN;
ip = XFS_I(inode);
trace_xfs_check_acl(ip);
/*
* If there is no attribute fork no ACL exists on this inode and
* we can skip the whole exercise.
*/
if (!XFS_IFORK_Q(ip))
return -EAGAIN;
if (flags & IPERM_FLAG_RCU) {
if (!negative_cached_acl(inode, ACL_TYPE_ACCESS))
return -ECHILD;
return -EAGAIN;
}
acl = xfs_get_acl(inode, ACL_TYPE_ACCESS);
if (IS_ERR(acl))
return PTR_ERR(acl);
if (acl) {
error = posix_acl_permission(inode, acl, mask);
posix_acl_release(acl);
}
return error;
}
int
xfs_check_acl(struct inode *inode, int mask)
{
struct xfs_inode *ip = XFS_I(inode);
struct posix_acl *acl;
int error = -EAGAIN;
xfs_itrace_entry(ip);
/*
* If there is no attribute fork no ACL exists on this inode and
* we can skip the whole exercise.
*/
if (!XFS_IFORK_Q(ip))
return -EAGAIN;
acl = xfs_get_acl(inode, ACL_TYPE_ACCESS);
if (IS_ERR(acl))
return PTR_ERR(acl);
if (acl) {
error = posix_acl_permission(inode, acl, mask);
posix_acl_release(acl);
}
return error;
}
int v9fs_check_acl(struct inode *inode, int mask, unsigned int flags)
{
struct posix_acl *acl;
struct v9fs_session_info *v9ses;
if (flags & IPERM_FLAG_RCU)
return -ECHILD;
v9ses = v9fs_inode2v9ses(inode);
if (((v9ses->flags & V9FS_ACCESS_MASK) != V9FS_ACCESS_CLIENT) ||
((v9ses->flags & V9FS_ACL_MASK) != V9FS_POSIX_ACL)) {
/*
* On access = client and acl = on mode get the acl
* values from the server
*/
return 0;
}
acl = v9fs_get_cached_acl(inode, ACL_TYPE_ACCESS);
if (IS_ERR(acl))
return PTR_ERR(acl);
if (acl) {
int error = posix_acl_permission(inode, acl, mask);
posix_acl_release(acl);
return error;
}
return -EAGAIN;
}
static int pvfs2_check_acl(struct inode *inode, int mask)
{
struct posix_acl *acl = NULL;
gossip_debug(GOSSIP_ACL_DEBUG, "pvfs2_check_acl: called on inode %llu\n",
llu(get_handle_from_ino(inode)));
acl = pvfs2_get_acl(inode, ACL_TYPE_ACCESS);
if (IS_ERR(acl)) {
int error = PTR_ERR(acl);
gossip_debug(GOSSIP_ACL_DEBUG, "pvfs2_check_acl: pvfs2_get_acl returned error %d\n",
error);
return error;
}
if (acl)
{
int error = posix_acl_permission(inode, acl, mask);
posix_acl_release(acl);
gossip_debug(GOSSIP_ACL_DEBUG, "pvfs2_check_acl: posix_acl_permission "
" (inode %llu, acl %p, mask %x) returned %d\n",
llu(get_handle_from_ino(inode)), acl, mask, error);
return error;
}
gossip_debug(GOSSIP_ACL_DEBUG, "pvfs2_check_acl returning EAGAIN\n");
return -EAGAIN;
}
int ocfs2_check_acl(struct inode *inode, int mask)
{
struct ocfs2_super *osb = OCFS2_SB(inode->i_sb);
struct buffer_head *di_bh = NULL;
struct posix_acl *acl;
int ret = -EAGAIN;
if (!(osb->s_mount_opt & OCFS2_MOUNT_POSIX_ACL))
return ret;
ret = ocfs2_read_inode_block(inode, &di_bh);
if (ret < 0) {
mlog_errno(ret);
return ret;
}
acl = ocfs2_get_acl_nolock(inode, ACL_TYPE_ACCESS, di_bh);
brelse(di_bh);
if (IS_ERR(acl)) {
mlog_errno(PTR_ERR(acl));
return PTR_ERR(acl);
}
if (acl) {
ret = posix_acl_permission(inode, acl, mask);
posix_acl_release(acl);
return ret;
}
return -EAGAIN;
}
int
generic_check_acl(struct inode *inode, int mask)
{
struct posix_acl *acl = get_cached_acl(inode, ACL_TYPE_ACCESS);
if (acl) {
int error = posix_acl_permission(inode, acl, mask);
posix_acl_release(acl);
return error;
}
return -EAGAIN;
}
/**
* shmem_check_acl - check_acl() callback for generic_permission()
*/
static int
shmem_check_acl(struct inode *inode, int mask)
{
struct posix_acl *acl = shmem_get_acl(inode, ACL_TYPE_ACCESS);
if (acl) {
int error = posix_acl_permission(inode, acl, mask);
posix_acl_release(acl);
return error;
}
return -EAGAIN;
}
int jfs_check_acl(struct inode *inode, int mask)
{
struct posix_acl *acl = jfs_get_acl(inode, ACL_TYPE_ACCESS);
if (IS_ERR(acl))
return PTR_ERR(acl);
if (acl) {
int error = posix_acl_permission(inode, acl, mask);
posix_acl_release(acl);
return error;
}
return -EAGAIN;
}
int ocfs2_check_acl(struct inode *inode, int mask)
{
struct posix_acl *acl = ocfs2_get_acl(inode, ACL_TYPE_ACCESS);
if (IS_ERR(acl))
return PTR_ERR(acl);
if (acl) {
int ret = posix_acl_permission(inode, acl, mask);
posix_acl_release(acl);
return ret;
}
return -EAGAIN;
}
static int jffs2_check_acl(struct inode *inode, int mask)
{
struct posix_acl *acl;
int rc;
acl = jffs2_get_acl(inode, ACL_TYPE_ACCESS);
if (IS_ERR(acl))
return PTR_ERR(acl);
if (acl) {
rc = posix_acl_permission(inode, acl, mask);
posix_acl_release(acl);
return rc;
}
return -EAGAIN;
}
static int jfs_check_acl(struct inode *inode, int mask)
{
struct jfs_inode_info *ji = JFS_IP(inode);
if (ji->i_acl == JFS_ACL_NOT_CACHED) {
struct posix_acl *acl = jfs_get_acl(inode, ACL_TYPE_ACCESS);
if (IS_ERR(acl))
return PTR_ERR(acl);
posix_acl_release(acl);
}
if (ji->i_acl)
return posix_acl_permission(inode, ji->i_acl, mask);
return -EAGAIN;
}
int gfs2_check_acl(struct inode *inode, int mask)
{
struct posix_acl *acl;
int error;
acl = gfs2_acl_get(GFS2_I(inode), ACL_TYPE_ACCESS);
if (IS_ERR(acl))
return PTR_ERR(acl);
if (acl) {
error = posix_acl_permission(inode, acl, mask);
posix_acl_release(acl);
return error;
}
return -EAGAIN;
}
static int
__zpl_check_acl(struct inode *ip, int mask)
{
struct posix_acl *acl;
int error;
acl = zpl_get_acl(ip, ACL_TYPE_ACCESS);
if (IS_ERR(acl))
return (PTR_ERR(acl));
if (acl) {
error = posix_acl_permission(ip, acl, mask);
zpl_posix_acl_release(acl);
return (error);
}
return (-EAGAIN);
}
int jffs2_check_acl(struct inode *inode, int mask, unsigned int flags)
{
struct posix_acl *acl;
int rc;
if (flags & IPERM_FLAG_RCU)
return -ECHILD;
acl = jffs2_get_acl(inode, ACL_TYPE_ACCESS);
if (IS_ERR(acl))
return PTR_ERR(acl);
if (acl) {
rc = posix_acl_permission(inode, acl, mask);
posix_acl_release(acl);
return rc;
}
return -EAGAIN;
}
int
generic_check_acl(struct inode *inode, int mask, unsigned int flags)
{
if (flags & IPERM_FLAG_RCU) {
if (!negative_cached_acl(inode, ACL_TYPE_ACCESS))
return -ECHILD;
} else {
struct posix_acl *acl;
acl = get_cached_acl(inode, ACL_TYPE_ACCESS);
if (acl) {
int error = posix_acl_permission(inode, acl, mask);
posix_acl_release(acl);
return error;
}
}
return -EAGAIN;
}
int
ext3_check_acl(struct inode *inode, int mask, unsigned int flags)
{
struct posix_acl *acl;
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))
return PTR_ERR(acl);
if (acl) {
int error = posix_acl_permission(inode, acl, mask);
posix_acl_release(acl);
return error;
}
return -EAGAIN;
}
/*
* Inode operation listxattr()
*
* We totally ignore the generic listxattr here because it would be stupid
* not to. Since the xattrs are organized in a directory, we can just
* readdir to find them.
*/
ssize_t reiserfs_listxattr(struct dentry * dentry, char *buffer, size_t size)
{
struct dentry *dir;
int err = 0;
loff_t pos = 0;
struct listxattr_buf buf = {
.dentry = dentry,
.buf = buffer,
.size = buffer ? size : 0,
};
if (!dentry->d_inode)
return -EINVAL;
if (!dentry->d_sb->s_xattr ||
get_inode_sd_version(dentry->d_inode) == STAT_DATA_V1)
return -EOPNOTSUPP;
dir = open_xa_dir(dentry->d_inode, XATTR_REPLACE);
if (IS_ERR(dir)) {
err = PTR_ERR(dir);
if (err == -ENODATA)
err = 0; /* Not an error if there aren't any xattrs */
goto out;
}
mutex_lock_nested(&dir->d_inode->i_mutex, I_MUTEX_XATTR);
err = reiserfs_readdir_dentry(dir, &buf, listxattr_filler, &pos);
mutex_unlock(&dir->d_inode->i_mutex);
if (!err)
err = buf.pos;
dput(dir);
out:
return err;
}
static int reiserfs_check_acl(struct inode *inode, int mask, unsigned int flags)
{
struct posix_acl *acl;
int error = -EAGAIN; /* do regular unix permission checks by default */
if (flags & IPERM_FLAG_RCU)
return -ECHILD;
acl = reiserfs_get_acl(inode, ACL_TYPE_ACCESS);
if (acl) {
if (!IS_ERR(acl)) {
error = posix_acl_permission(inode, acl, mask);
posix_acl_release(acl);
} else if (PTR_ERR(acl) != -ENODATA)
error = PTR_ERR(acl);
}
return error;
}
static int create_privroot(struct dentry *dentry)
{
int err;
struct inode *inode = dentry->d_parent->d_inode;
WARN_ON_ONCE(!mutex_is_locked(&inode->i_mutex));
err = xattr_mkdir(inode, dentry, 0700);
if (err || !dentry->d_inode) {
reiserfs_warning(dentry->d_sb, "jdm-20006",
"xattrs/ACLs enabled and couldn't "
"find/create .reiserfs_priv. "
"Failing mount.");
return -EOPNOTSUPP;
}
dentry->d_inode->i_flags |= S_PRIVATE;
reiserfs_info(dentry->d_sb, "Created %s - reserved for xattr "
"storage.\n", PRIVROOT_NAME);
return 0;
}