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pan class="hl com">/* concurrent read */ #define DLM_LOCK_CW 2 /* concurrent write */ #define DLM_LOCK_PR 3 /* protected read */ #define DLM_LOCK_PW 4 /* protected write */ #define DLM_LOCK_EX 5 /* exclusive */ /* * Flags to dlm_lock * * DLM_LKF_NOQUEUE * * Do not queue the lock request on the wait queue if it cannot be granted * immediately. If the lock cannot be granted because of this flag, DLM will * either return -EAGAIN from the dlm_lock call or will return 0 from * dlm_lock and -EAGAIN in the lock status block when the AST is executed. * * DLM_LKF_CANCEL * * Used to cancel a pending lock request or conversion. A converting lock is * returned to its previously granted mode. * * DLM_LKF_CONVERT * * Indicates a lock conversion request. For conversions the name and namelen * are ignored and the lock ID in the LKSB is used to identify the lock. * * DLM_LKF_VALBLK * * Requests DLM to return the current contents of the lock value block in the * lock status block. When this flag is set in a lock conversion from PW or EX * modes, DLM assigns the value specified in the lock status block to the lock * value block of the lock resource. The LVB is a DLM_LVB_LEN size array * containing application-specific information.