struct byte_range_lock *do_lock(files_struct *fsp, uint32 lock_pid, SMB_BIG_UINT count, SMB_BIG_UINT offset, enum brl_type lock_type, enum brl_flavour lock_flav, BOOL blocking_lock, NTSTATUS *perr, uint32 *plock_pid) { struct byte_range_lock *br_lck = NULL; if (!fsp->can_lock) { *perr = fsp->is_directory ? NT_STATUS_INVALID_DEVICE_REQUEST : NT_STATUS_INVALID_HANDLE; return NULL; } if (!lp_locking(fsp->conn->params)) { *perr = NT_STATUS_OK; return NULL; } /* NOTE! 0 byte long ranges ARE allowed and should be stored */ DEBUG(10,("do_lock: lock flavour %s lock type %s start=%.0f len=%.0f requested for fnum %d file %s\n", lock_flav_name(lock_flav), lock_type_name(lock_type), (double)offset, (double)count, fsp->fnum, fsp->fsp_name )); br_lck = brl_get_locks(NULL, fsp); if (!br_lck) { *perr = NT_STATUS_NO_MEMORY; return NULL; } *perr = brl_lock(br_lck, lock_pid, procid_self(), offset, count, lock_type, lock_flav, blocking_lock, plock_pid); if (lock_flav == WINDOWS_LOCK && fsp->current_lock_count != NO_LOCKING_COUNT) { /* blocking ie. pending, locks also count here, * as this is an efficiency counter to avoid checking * the lock db. on close. JRA. */ fsp->current_lock_count++; } else { /* Notice that this has had a POSIX lock request. * We can't count locks after this so forget them. */ fsp->current_lock_count = NO_LOCKING_COUNT; } return br_lck; }
NTSTATUS do_lock(files_struct *fsp, uint16 lock_pid, SMB_BIG_UINT count, SMB_BIG_UINT offset, enum brl_type lock_type, enum brl_flavour lock_flav, BOOL *my_lock_ctx) { struct byte_range_lock *br_lck = NULL; NTSTATUS status = NT_STATUS_LOCK_NOT_GRANTED; if (!OPEN_FSP(fsp) || !fsp->can_lock) { return NT_STATUS_INVALID_HANDLE; } if (!lp_locking(SNUM(fsp->conn))) { return NT_STATUS_OK; } /* NOTE! 0 byte long ranges ARE allowed and should be stored */ DEBUG(10,("do_lock: lock flavour %s lock type %s start=%.0f len=%.0f requested for fnum %d file %s\n", lock_flav_name(lock_flav), lock_type_name(lock_type), (double)offset, (double)count, fsp->fnum, fsp->fsp_name )); br_lck = brl_get_locks(fsp); if (!br_lck) { return NT_STATUS_NO_MEMORY; } status = brl_lock(br_lck, lock_pid, procid_self(), offset, count, lock_type, lock_flav, my_lock_ctx); byte_range_lock_destructor(br_lck); return status; }
BOOL is_locked(files_struct *fsp, SMB_BIG_UINT count, SMB_BIG_UINT offset, enum brl_type lock_type) { int snum = SNUM(fsp->conn); int strict_locking = lp_strict_locking(snum); enum brl_flavour lock_flav = lp_posix_cifsu_locktype(); BOOL ret = True; if (count == 0) { return False; } if (!lp_locking(snum) || !strict_locking) { return False; } if (strict_locking == Auto) { if (EXCLUSIVE_OPLOCK_TYPE(fsp->oplock_type) && (lock_type == READ_LOCK || lock_type == WRITE_LOCK)) { DEBUG(10,("is_locked: optimisation - exclusive oplock on file %s\n", fsp->fsp_name )); ret = False; } else if ((fsp->oplock_type == LEVEL_II_OPLOCK) && (lock_type == READ_LOCK)) { DEBUG(10,("is_locked: optimisation - level II oplock on file %s\n", fsp->fsp_name )); ret = False; } else { struct byte_range_lock *br_lck = brl_get_locks(fsp); if (!br_lck) { return False; } ret = !brl_locktest(br_lck, global_smbpid, procid_self(), offset, count, lock_type, lock_flav); byte_range_lock_destructor(br_lck); } } else { struct byte_range_lock *br_lck = brl_get_locks(fsp); if (!br_lck) { return False; } ret = !brl_locktest(br_lck, global_smbpid, procid_self(), offset, count, lock_type, lock_flav); byte_range_lock_destructor(br_lck); } DEBUG(10,("is_locked: flavour = %s brl start=%.0f len=%.0f %s for fnum %d file %s\n", lock_flav_name(lock_flav), (double)offset, (double)count, ret ? "locked" : "unlocked", fsp->fnum, fsp->fsp_name )); return ret; }
struct byte_range_lock *do_lock(struct messaging_context *msg_ctx, files_struct *fsp, uint64_t smblctx, uint64_t count, uint64_t offset, enum brl_type lock_type, enum brl_flavour lock_flav, bool blocking_lock, NTSTATUS *perr, uint64_t *psmblctx, struct blocking_lock_record *blr) { struct byte_range_lock *br_lck = NULL; /* silently return ok on print files as we don't do locking there */ if (fsp->print_file) { *perr = NT_STATUS_OK; return NULL; } if (!fsp->can_lock) { *perr = fsp->is_directory ? NT_STATUS_INVALID_DEVICE_REQUEST : NT_STATUS_INVALID_HANDLE; return NULL; } if (!lp_locking(fsp->conn->params)) { *perr = NT_STATUS_OK; return NULL; } /* NOTE! 0 byte long ranges ARE allowed and should be stored */ DEBUG(10,("do_lock: lock flavour %s lock type %s start=%.0f len=%.0f " "blocking_lock=%s requested for %s file %s\n", lock_flav_name(lock_flav), lock_type_name(lock_type), (double)offset, (double)count, blocking_lock ? "true" : "false", fsp_fnum_dbg(fsp), fsp_str_dbg(fsp))); br_lck = brl_get_locks(talloc_tos(), fsp); if (!br_lck) { *perr = NT_STATUS_NO_MEMORY; return NULL; } *perr = brl_lock(msg_ctx, br_lck, smblctx, messaging_server_id(fsp->conn->sconn->msg_ctx), offset, count, lock_type, lock_flav, blocking_lock, psmblctx, blr); DEBUG(10, ("do_lock: returning status=%s\n", nt_errstr(*perr))); increment_current_lock_count(fsp, lock_flav); return br_lck; }
bool strict_lock_default(files_struct *fsp, struct lock_struct *plock) { int strict_locking = lp_strict_locking(fsp->conn->params); bool ret = False; if (plock->size == 0) { return True; } if (!lp_locking(fsp->conn->params) || !strict_locking) { return True; } if (strict_locking == Auto) { if (EXCLUSIVE_OPLOCK_TYPE(fsp->oplock_type) && (plock->lock_type == READ_LOCK || plock->lock_type == WRITE_LOCK)) { DEBUG(10,("is_locked: optimisation - exclusive oplock on file %s\n", fsp_str_dbg(fsp))); ret = True; } else if ((fsp->oplock_type == LEVEL_II_OPLOCK) && (plock->lock_type == READ_LOCK)) { DEBUG(10,("is_locked: optimisation - level II oplock on file %s\n", fsp_str_dbg(fsp))); ret = True; } else { struct byte_range_lock *br_lck; br_lck = brl_get_locks_readonly(fsp); if (!br_lck) { return True; } ret = brl_locktest(br_lck, plock->context.smblctx, plock->context.pid, plock->start, plock->size, plock->lock_type, plock->lock_flav); } } else { struct byte_range_lock *br_lck; br_lck = brl_get_locks_readonly(fsp); if (!br_lck) { return True; } ret = brl_locktest(br_lck, plock->context.smblctx, plock->context.pid, plock->start, plock->size, plock->lock_type, plock->lock_flav); } DEBUG(10,("strict_lock_default: flavour = %s brl start=%.0f " "len=%.0f %s for fnum %llu file %s\n", lock_flav_name(plock->lock_flav), (double)plock->start, (double)plock->size, ret ? "unlocked" : "locked", (unsigned long long)plock->fnum, fsp_str_dbg(fsp))); return ret; }