/*
* smb_vop_shrlock()
*
* See comments for smb_fsop_shrlock()
*/
int
smb_vop_shrlock(vnode_t *vp, uint32_t uniq_fid, uint32_t desired_access,
uint32_t share_access, cred_t *cr)
{
struct shrlock shr;
struct shr_locowner shr_own;
short new_access = 0;
short deny = 0;
int flag = 0;
int cmd;
cmd = (nbl_need_check(vp)) ? F_SHARE_NBMAND : F_SHARE;
/*
* Check if this is a metadata access
*/
if ((desired_access & FILE_DATA_ALL) == 0) {
new_access |= F_MDACC;
} else {
if (desired_access & (ACE_READ_DATA | ACE_EXECUTE)) {
new_access |= F_RDACC;
flag |= FREAD;
}
if (desired_access & (ACE_WRITE_DATA | ACE_APPEND_DATA |
ACE_ADD_FILE)) {
new_access |= F_WRACC;
flag |= FWRITE;
}
if (SMB_DENY_READ(share_access)) {
deny |= F_RDDNY;
}
if (SMB_DENY_WRITE(share_access)) {
deny |= F_WRDNY;
}
if (cmd == F_SHARE_NBMAND) {
if (desired_access & ACE_DELETE)
new_access |= F_RMACC;
if (SMB_DENY_DELETE(share_access)) {
deny |= F_RMDNY;
}
}
}
shr.s_access = new_access;
shr.s_deny = deny;
shr.s_sysid = smb_ct.cc_sysid;
shr.s_pid = uniq_fid;
shr.s_own_len = sizeof (shr_own);
shr.s_owner = (caddr_t)&shr_own;
shr_own.sl_id = shr.s_sysid;
shr_own.sl_pid = shr.s_pid;
return (VOP_SHRLOCK(vp, cmd, &shr, flag, cr, NULL));
}
/*
* check file sharing rules for current open request
* against existing open instances of the same file
*
* Returns NT_STATUS_SHARING_VIOLATION if there is any
* sharing conflict, otherwise returns NT_STATUS_SUCCESS.
*/
uint32_t
smb_ofile_open_check(smb_ofile_t *of, uint32_t desired_access,
uint32_t share_access)
{
ASSERT(of->f_magic == SMB_OFILE_MAGIC);
mutex_enter(&of->f_mutex);
if (of->f_state != SMB_OFILE_STATE_OPEN) {
mutex_exit(&of->f_mutex);
return (NT_STATUS_INVALID_HANDLE);
}
/* if it's just meta data */
if ((of->f_granted_access & FILE_DATA_ALL) == 0) {
mutex_exit(&of->f_mutex);
return (NT_STATUS_SUCCESS);
}
/*
* Check requested share access against the
* open granted (desired) access
*/
if (SMB_DENY_DELETE(share_access) && (of->f_granted_access & DELETE)) {
mutex_exit(&of->f_mutex);
return (NT_STATUS_SHARING_VIOLATION);
}
if (SMB_DENY_READ(share_access) &&
(of->f_granted_access & (FILE_READ_DATA | FILE_EXECUTE))) {
mutex_exit(&of->f_mutex);
return (NT_STATUS_SHARING_VIOLATION);
}
if (SMB_DENY_WRITE(share_access) &&
(of->f_granted_access & (FILE_WRITE_DATA | FILE_APPEND_DATA))) {
mutex_exit(&of->f_mutex);
return (NT_STATUS_SHARING_VIOLATION);
}
/* check requested desired access against the open share access */
if (SMB_DENY_DELETE(of->f_share_access) && (desired_access & DELETE)) {
mutex_exit(&of->f_mutex);
return (NT_STATUS_SHARING_VIOLATION);
}
if (SMB_DENY_READ(of->f_share_access) &&
(desired_access & (FILE_READ_DATA | FILE_EXECUTE))) {
mutex_exit(&of->f_mutex);
return (NT_STATUS_SHARING_VIOLATION);
}
if (SMB_DENY_WRITE(of->f_share_access) &&
(desired_access & (FILE_WRITE_DATA | FILE_APPEND_DATA))) {
mutex_exit(&of->f_mutex);
return (NT_STATUS_SHARING_VIOLATION);
}
mutex_exit(&of->f_mutex);
return (NT_STATUS_SUCCESS);
}
