/*
- * Copyright (c) 2000-2004 Apple Computer, Inc. All rights reserved.
+ * Copyright (c) 2000-2004, 2012-2014 Apple Inc. All rights reserved.
*
* @APPLE_OSREFERENCE_LICENSE_HEADER_START@
*
@field sc_reserved Reserved, must be set to zero.
*/
struct sockaddr_ctl {
- u_char sc_len; /* depends on size of bundle ID string */
- u_char sc_family; /* AF_SYSTEM */
+ u_char sc_len; /* depends on size of bundle ID string */
+ u_char sc_family; /* AF_SYSTEM */
u_int16_t ss_sysaddr; /* AF_SYS_KERNCONTROL */
u_int32_t sc_id; /* Controller unique identifier */
u_int32_t sc_unit; /* Developer private unit number */
u_int32_t sc_reserved[5];
};
+#ifdef PRIVATE
+
+struct xkctl_reg {
+ u_int32_t xkr_len;
+ u_int32_t xkr_kind;
+ u_int32_t xkr_id;
+ u_int32_t xkr_reg_unit;
+ u_int32_t xkr_flags;
+ u_int64_t xkr_kctlref;
+ u_int32_t xkr_recvbufsize;
+ u_int32_t xkr_sendbufsize;
+ u_int32_t xkr_lastunit;
+ u_int32_t xkr_pcbcount;
+ u_int64_t xkr_connect;
+ u_int64_t xkr_disconnect;
+ u_int64_t xkr_send;
+ u_int64_t xkr_send_list;
+ u_int64_t xkr_setopt;
+ u_int64_t xkr_getopt;
+ u_int64_t xkr_rcvd;
+ char xkr_name[MAX_KCTL_NAME];
+};
+
+struct xkctlpcb {
+ u_int32_t xkp_len;
+ u_int32_t xkp_kind;
+ u_int64_t xkp_kctpcb;
+ u_int32_t xkp_unit;
+ u_int32_t xkp_kctlid;
+ u_int64_t xkp_kctlref;
+ char xkp_kctlname[MAX_KCTL_NAME];
+};
+
+struct kctlstat {
+ u_int64_t kcs_reg_total __attribute__((aligned(8)));
+ u_int64_t kcs_reg_count __attribute__((aligned(8)));
+ u_int64_t kcs_pcbcount __attribute__((aligned(8)));
+ u_int64_t kcs_gencnt __attribute__((aligned(8)));
+ u_int64_t kcs_connections __attribute__((aligned(8)));
+ u_int64_t kcs_conn_fail __attribute__((aligned(8)));
+ u_int64_t kcs_send_fail __attribute__((aligned(8)));
+ u_int64_t kcs_send_list_fail __attribute__((aligned(8)));
+ u_int64_t kcs_enqueue_fail __attribute__((aligned(8)));
+ u_int64_t kcs_enqueue_fullsock __attribute__((aligned(8)));
+
+};
+
+#endif /* PRIVATE */
+
#ifdef KERNEL
#include <sys/kpi_mbuf.h>
*/
#define CTL_FLAG_REG_SOCK_STREAM 0x4
+#ifdef KERNEL_PRIVATE
+/*!
+ @defined CTL_FLAG_REG_EXTENDED
+ @discussion This flag indicates that this kernel control utilizes the
+ the extended fields within the kern_ctl_reg structure.
+*/
+#define CTL_FLAG_REG_EXTENDED 0x8
+
+/*!
+ @defined CTL_FLAG_REG_CRIT
+ @discussion This flag indicates that this kernel control utilizes the
+ the extended fields within the kern_ctl_reg structure.
+*/
+#define CTL_FLAG_REG_CRIT 0x10
+#endif /* KERNEL_PRIVATE */
+
/* Data flags for controllers */
/*!
@defined CTL_DATA_NOWAKEUP
the client after all of the data has been enqueued.
*/
#define CTL_DATA_NOWAKEUP 0x1
+
/*!
@defined CTL_DATA_EOR
- @discussion The CTL_DATA_NOWAKEUP flag can be used for the enqueue
+ @discussion The CTL_DATA_EOR flag can be used for the enqueue
data and enqueue mbuf functions to mark the end of a record.
*/
#define CTL_DATA_EOR 0x2
+#ifdef KERNEL_PRIVATE
+/*!
+ @defined CTL_DATA_CRIT
+ @discussion This flag indicates the data is critical to the client
+ and that it needs to be forced into the socket buffer
+ by resizing it if needed.
+*/
+#define CTL_DATA_CRIT 0x4
+#endif /* KERNEL_PRIVATE */
+
+__BEGIN_DECLS
+
/*!
@typedef ctl_connect_func
@discussion The ctl_connect_func is used to receive
If CTL_FLAG_REG_ID_UNIT was not set when the kernel control was
registered, sc_unit is the dynamically allocated unit number of
the new kernel control instance that is used for this connection.
- @param unitinfo A place for the kernel control to store a pointer to
- per-connection data.
+ @param unitinfo A placeholder for a pointer to the optional user-defined
+ private data associated with this kernel control instance. This
+ opaque info will be provided to the user when the rest of the
+ callback routines are executed. For example, it can be used
+ to pass a pointer to an instance-specific data structure in
+ order for the user to keep track of the states related to this
+ kernel control instance.
*/
typedef errno_t (*ctl_connect_func)(kern_ctl_ref kctlref,
struct sockaddr_ctl *sac,
disconnected from.
@param unit The unit number of the kernel control instance the client has
disconnected from.
- @param unitinfo The unitinfo value specified by the connect function
- when the client connected.
+ @param unitinfo The user-defined private data initialized by the
+ ctl_connect_func callback.
*/
typedef errno_t (*ctl_disconnect_func)(kern_ctl_ref kctlref, u_int32_t unit, void *unitinfo);
@param kctlref The control ref of the kernel control.
@param unit The unit number of the kernel control instance the client has
connected to.
- @param unitinfo The unitinfo value specified by the connect function
- when the client connected.
+ @param unitinfo The user-defined private data initialized by the
+ ctl_connect_func callback.
@param m The data sent by the client to the kernel control in an
+ mbuf chain. Your function is responsible for releasing the
mbuf chain.
@param flags The flags specified by the client when calling
send/sendto/sendmsg (MSG_OOB/MSG_DONTROUTE).
calls for the SYSPROTO_CONTROL option level.
@param kctlref The control ref of the kernel control.
@param unit The unit number of the kernel control instance.
- @param unitinfo The unitinfo value specified by the connect function
- when the client connected.
+ @param unitinfo The user-defined private data initialized by the
+ ctl_connect_func callback.
@param opt The socket option.
@param data A pointer to the socket option data. The data has
already been copied in to the kernel for you.
return an error.
@param kctlref The control ref of the kernel control.
@param unit The unit number of the kernel control instance.
- @param unitinfo The unitinfo value specified by the connect function
- when the client connected.
+ @param unitinfo The user-defined private data initialized by the
+ ctl_connect_func callback.
@param opt The socket option.
@param data A buffer to copy the results in to. May be NULL, see
discussion.
typedef errno_t (*ctl_getopt_func)(kern_ctl_ref kctlref, u_int32_t unit, void *unitinfo,
int opt, void *data, size_t *len);
+#ifdef KERNEL_PRIVATE
+/*!
+ @typedef ctl_rcvd_func
+ @discussion The ctl_rcvd_func is called when the client reads data from
+ the kernel control socket. The kernel control can use this callback
+ in combination with ctl_getenqueuespace() to avoid overflowing
+ the socket's receive buffer. When ctl_getenqueuespace() returns
+ 0 or ctl_enqueuedata()/ctl_enqueuembuf() return ENOBUFS, the
+ kernel control can wait until this callback is called before
+ trying to enqueue the data again.
+ @param kctlref The control ref of the kernel control.
+ @param unit The unit number of the kernel control instance.
+ @param unitinfo The user-defined private data initialized by the
+ ctl_connect_func callback.
+ @param flags The recv flags. See the recv(2) man page.
+ */
+typedef void (*ctl_rcvd_func)(kern_ctl_ref kctlref, u_int32_t unit, void *unitinfo,
+ int flags);
+
+/*!
+ @typedef ctl_send_list_func
+ @discussion The ctl_send_list_func is used to receive data sent from
+ the client to the kernel control.
+ @param kctlref The control ref of the kernel control.
+ @param unit The unit number of the kernel control instance the client has
+ connected to.
+ @param unitinfo The user-defined private data initialized by the
+ ctl_connect_func callback.
+ @param m The data sent by the client to the kernel control in an
+ mbuf packet chain. Your function is responsible for releasing
+ mbuf packet chain.
+ @param flags The flags specified by the client when calling
+ send/sendto/sendmsg (MSG_OOB/MSG_DONTROUTE).
+ */
+typedef errno_t (*ctl_send_list_func)(kern_ctl_ref kctlref, u_int32_t unit, void *unitinfo,
+ mbuf_t m, int flags);
+#endif /* KERNEL_PRIVATE */
+
/*!
@struct kern_ctl_reg
@discussion This structure defines the properties of a kernel
ctl_send_func ctl_send;
ctl_setopt_func ctl_setopt;
ctl_getopt_func ctl_getopt;
+#ifdef KERNEL_PRIVATE
+ ctl_rcvd_func ctl_rcvd; /* Only valid if CTL_FLAG_REG_EXTENDED is set */
+ ctl_send_list_func ctl_send_list; /* Only valid if CTL_FLAG_REG_EXTENDED is set */
+#endif /* KERNEL_PRIVATE */
};
/*!
@param unit The unit number of the kernel control instance.
@param data A pointer to the data to send.
@param len The length of data to send.
- @param flags Send flags. CTL_DATA_NOWAKEUP is currently the only
- supported flag.
+ @param flags Send flags. CTL_DATA_NOWAKEUP and CTL_DATA_EOR are currently
+ the only supported flags.
@result 0 - Data was enqueued to be read by the client.
EINVAL - Invalid parameters.
EMSGSIZE - The buffer is too large.
@param kctlref The control reference of the kernel control.
@param unit The unit number of the kernel control instance.
@param m An mbuf chain containing the data to send to the client.
- @param flags Send flags. CTL_DATA_NOWAKEUP is currently the only
- supported flag.
+ @param flags Send flags. CTL_DATA_NOWAKEUP and CTL_DATA_EOR are currently
+ the only supported flags.
@result 0 - Data was enqueued to be read by the client.
EINVAL - Invalid parameters.
ENOBUFS - The queue is full.
errno_t
ctl_enqueuembuf(kern_ctl_ref kctlref, u_int32_t unit, mbuf_t m, u_int32_t flags);
+#ifdef PRIVATE
+/*!
+ @function ctl_enqueuembuf_list
+ @discussion Send data stored in an mbuf packet chain from the kernel
+ control to the client. The caller is responsible for freeing
+ the mbuf chain if ctl_enqueuembuf returns an error.
+ Not valid if ctl_flags contains CTL_FLAG_REG_SOCK_STREAM.
+ @param kctlref The control reference of the kernel control.
+ @param unit The unit number of the kernel control instance.
+ @param m An mbuf chain containing the data to send to the client.
+ @param flags Send flags. CTL_DATA_NOWAKEUP is
+ the only supported flags.
+ @param m_remain A pointer to the list of mbuf packets in the chain that
+ could not be enqueued.
+ @result 0 - Data was enqueued to be read by the client.
+ EINVAL - Invalid parameters.
+ ENOBUFS - The queue is full.
+ */
+errno_t
+ctl_enqueuembuf_list(kern_ctl_ref kctlref, u_int32_t unit, mbuf_t m_list,
+ u_int32_t flags, mbuf_t *m_remain);
+
+
+#endif
/*!
@function ctl_getenqueuespace
@param kctlref The control reference of the kernel control.
@param unit The unit number of the kernel control instance.
@param space The address where to return the current space available
- @result 0 - Data was enqueued to be read by the client.
+ @result 0 - Success; the amount of space is returned to caller.
EINVAL - Invalid parameters.
*/
errno_t
ctl_getenqueuespace(kern_ctl_ref kctlref, u_int32_t unit, size_t *space);
+/*!
+ @function ctl_getenqueuereadable
+ @discussion Retrieve the difference between enqueued bytes and
+ low-water mark for the socket receive buffer.
+ @param kctlref The control reference of the kernel control.
+ @param unit The unit number of the kernel control instance.
+ @param u_int32_t The address at which to return the current difference
+ between the low-water mark for the socket and the number of bytes
+ enqueued. 0 indicates that the socket is readable by the client
+ (the number of bytes in the buffer is above the low-water mark).
+ @result 0 - Success; the difference is returned to caller.
+ EINVAL - Invalid parameters.
+ */
+errno_t
+ctl_getenqueuereadable(kern_ctl_ref kctlref, u_int32_t unit, u_int32_t *difference);
+
+#ifdef KERNEL_PRIVATE
+
+#include <sys/queue.h>
+#include <libkern/locks.h>
+
+/*
+ * internal structure maintained for each register controller
+ */
+struct ctl_cb;
+struct socket;
+
+struct kctl {
+ TAILQ_ENTRY(kctl) next; /* controller chain */
+
+ /* controller information provided when registering */
+ char name[MAX_KCTL_NAME]; /* unique nke identifier, provided by DTS */
+ u_int32_t id;
+ u_int32_t reg_unit;
+
+ /* misc communication information */
+ u_int32_t flags; /* support flags */
+ u_int32_t recvbufsize; /* request more than the default buffer size */
+ u_int32_t sendbufsize; /* request more than the default buffer size */
+
+ /* Dispatch functions */
+ ctl_connect_func connect; /* Make contact */
+ ctl_disconnect_func disconnect; /* Break contact */
+ ctl_send_func send; /* Send data to nke */
+ ctl_send_list_func send_list; /* Send list of packets */
+ ctl_setopt_func setopt; /* set kctl configuration */
+ ctl_getopt_func getopt; /* get kctl configuration */
+ ctl_rcvd_func rcvd; /* Notify nke when client reads data */
+
+ TAILQ_HEAD(, ctl_cb) kcb_head;
+ u_int32_t lastunit;
+};
+
+struct ctl_cb {
+ TAILQ_ENTRY(ctl_cb) next; /* controller chain */
+ lck_mtx_t *mtx;
+ struct socket *so; /* controlling socket */
+ struct kctl *kctl; /* back pointer to controller */
+ void *userdata;
+ u_int32_t unit;
+ u_int32_t usecount;
+};
+
+u_int32_t ctl_id_by_name(const char *name);
+errno_t ctl_name_by_id(u_int32_t id, char *out_name, size_t maxsize);
+#endif /* KERNEL_PRIVATE */
+__END_DECLS
#endif /* KERNEL */
#endif /* KPI_KERN_CONTROL_H */
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