* Dual LGPL v2.1/GPL v2 license.
*/
-struct lib_ring_buffer_backend_page {
- void *virt; /* page virtual address (cached) */
- struct page *page; /* pointer to page structure */
-};
+#include "shm_internal.h"
struct lib_ring_buffer_backend_pages {
unsigned long mmap_offset; /* offset of the subbuffer in mmap */
union v_atomic records_commit; /* current records committed count */
union v_atomic records_unread; /* records to read */
unsigned long data_size; /* Amount of data to read from subbuf */
- struct lib_ring_buffer_backend_page p[];
+ DECLARE_SHMP(char, p); /* Backing memory map */
};
struct lib_ring_buffer_backend_subbuffer {
struct channel;
struct lib_ring_buffer;
+struct lib_ring_buffer_backend_pages_shmp {
+ DECLARE_SHMP(struct lib_ring_buffer_backend_pages, shmp);
+};
+
struct lib_ring_buffer_backend {
/* Array of ring_buffer_backend_subbuffer for writer */
- struct lib_ring_buffer_backend_subbuffer *buf_wsb;
+ DECLARE_SHMP(struct lib_ring_buffer_backend_subbuffer, buf_wsb);
/* ring_buffer_backend_subbuffer for reader */
struct lib_ring_buffer_backend_subbuffer buf_rsb;
/*
* Pointer array of backend pages, for whole buffer.
* Indexed by ring_buffer_backend_subbuffer identifier (id) index.
*/
- struct lib_ring_buffer_backend_pages **array;
- unsigned int num_pages_per_subbuf;
+ DECLARE_SHMP(struct lib_ring_buffer_backend_pages_shmp, array);
+ DECLARE_SHMP(char, memory_map); /* memory mapping */
- struct channel *chan; /* Associated channel */
+ DECLARE_SHMP(struct channel, chan); /* Associated channel */
int cpu; /* This buffer's cpu. -1 if global. */
union v_atomic records_read; /* Number of records read */
unsigned int allocated:1; /* Bool: is buffer allocated ? */
};
+struct lib_ring_buffer_shmp {
+ DECLARE_SHMP(struct lib_ring_buffer, shmp); /* Channel per-cpu buffers */
+};
+
struct channel_backend {
unsigned long buf_size; /* Size of the buffer */
unsigned long subbuf_size; /* Sub-buffer size */
*/
unsigned int buf_size_order; /* Order of buffer size */
int extra_reader_sb:1; /* Bool: has extra reader subbuffer */
- struct lib_ring_buffer *buf; /* Channel per-cpu buffers */
-
unsigned long num_subbuf; /* Number of sub-buffers for writer */
u64 start_tsc; /* Channel creation TSC value */
void *priv; /* Client-specific information */
const struct lib_ring_buffer_config *config; /* Ring buffer configuration */
char name[NAME_MAX]; /* Channel name */
+ struct lib_ring_buffer_shmp buf[];
};
#endif /* _LINUX_RING_BUFFER_BACKEND_TYPES_H */