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sched/wqueue/kwork_notifier.c:  Redesign some data structures.  struct works_s must appear at the beginning of the notifier entry structure.  That is because it contains the work queue indices.  This solves a harfault issue.

    net/tcp/tcp_netpoll.c:  tcp_iob_work() needs to free the allocated argument when it is finished.

    net/tcp/tcp_send_buffered.c:  Extend psock_tcp_cansend() so that it also requires that at least on IOB is also avaialble.

    mm/iob:  iob_navail() was returning the number of free IOB chain queue entries, not the number of free IOBs.  Completely misnamed.

    net/tcp/tcp_netpoll.c:  Add logic to receive notifications when IOBs are freed (Needs CONFIG_NET_TCP_WRITE_BUFFERS and CONFIG_IOB_NOTIFIER).  At present, does nothing because the logic in in psock_tcp_cansend() does not check for the availability of IOBs.  That will change.
This commit is contained in:
Gregory Nutt
2018-09-12 08:57:06 -06:00
parent 76eec53e4f
commit b3f0aab00a
5 changed files with 100 additions and 90 deletions
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include/nuttx/wqueue.h
+35 -1
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@@ -291,7 +291,11 @@ enum work_evtype_e
WORK_UDP_READAHEAD /* Notify that TCP read-ahead data is available */
};
/* This structure describes one notification */
/* This structure describes one notification and is provided as input to
* to work_notifier_setup(). This input is copied by work_notifier_setup()
* into an allocated instance of struct work_notifier_entry_s and need not
* persist on the caller's side.
*/
struct work_notifier_s
{
@@ -302,6 +306,36 @@ struct work_notifier_s
worker_t worker; /* The worker function to schedule */
};
/* This structure describes one notification list entry. It is cast-
* compatible with struct work_notifier_s. This structure is an allocated
* container for the user notification data. It is allocated because it
* must persist until the work is executed and must be freed using
* kmm_free() by the work.
*
* With the work notification is scheduled, the work function will receive
* the allocated instance of struct work_notifier_entry_s as its input
* argument. When it completes the notification operation, the work function
* is responsible for freeing that instance.
*/
struct work_notifier_entry_s
{
/* This must appear at the beginning of the structure. A reference to
* the struct work_notifier_entry_s instance must be cast-compatible with
* struct dq_entry_s.
*/
struct work_s work; /* Used for scheduling the work */
/* User notification information */
struct work_notifier_s info; /* The notification info */
/* Additional payload needed to manage the notification */
int16_t key; /* Unique ID for the notification */
};
/****************************************************************************
* Public Data
****************************************************************************/