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Date: Tue, 1 Jul 2014 23:47:13 +0200 From: Thomas Schoebel-Theuer <tst@...oebel-theuer.de> To: linux-kernel@...r.kernel.org Subject: [PATCH 33/50] mars: add new file include/linux/xio/xio_if.h Signed-off-by: Thomas Schoebel-Theuer <tst@...oebel-theuer.de> --- include/linux/xio/xio_if.h | 93 ++++++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 93 insertions(+) create mode 100644 include/linux/xio/xio_if.h diff --git a/include/linux/xio/xio_if.h b/include/linux/xio/xio_if.h new file mode 100644 index 0000000..ec7f226 --- /dev/null +++ b/include/linux/xio/xio_if.h @@ -0,0 +1,93 @@ +/* (c) 2010 Thomas Schoebel-Theuer / 1&1 Internet AG */ +#ifndef XIO_IF_H +#define XIO_IF_H + +#include <linux/semaphore.h> + +#define HT_SHIFT 6 /* ???? */ +#define XIO_MAX_SEGMENT_SIZE (1U << (9+HT_SHIFT)) + +#define MAX_BIO 32 + +/************************ global tuning ***********************/ + +extern int if_throttle_start_size; /* in kb */ +extern struct xio_limiter if_throttle; + +/***********************************************/ + +/* I don't want to enhance / intrude into struct bio for compatibility reasons + * (support for a variety of kernel versions). + * The following is just a silly workaround which could be removed again. + */ +struct bio_wrapper { + struct bio *bio; + atomic_t bi_comp_cnt; + unsigned long start_time; +}; + +struct if_aio_aspect { + GENERIC_ASPECT(aio); + struct list_head plug_head; + struct list_head hash_head; + int hash_index; + int bio_count; + int current_len; + int max_len; + struct page *orig_page; + struct bio_wrapper *orig_biow[MAX_BIO]; + struct if_input *input; +}; + +struct if_hash_anchor; + +struct if_input { + XIO_INPUT(if); + /* TODO: move this to if_brick (better systematics) */ + struct list_head plug_anchor; + struct request_queue *q; + struct gendisk *disk; + struct block_device *bdev; + loff_t capacity; + atomic_t plugged_count; + atomic_t flying_count; + + /* only for statistics */ + atomic_t read_flying_count; + atomic_t write_flying_count; + atomic_t total_reada_count; + atomic_t total_read_count; + atomic_t total_write_count; + atomic_t total_empty_count; + atomic_t total_fire_count; + atomic_t total_skip_sync_count; + atomic_t total_aio_read_count; + atomic_t total_aio_write_count; + spinlock_t req_lock; + struct semaphore kick_sem; + struct if_hash_anchor *hash_table; +}; + +struct if_output { + XIO_OUTPUT(if); +}; + +struct if_brick { + XIO_BRICK(if); + /* parameters */ + loff_t dev_size; + int max_plugged; + int readahead; + bool skip_sync; + + /* inspectable */ + atomic_t open_count; + + /* private */ + struct semaphore switch_sem; + struct say_channel *say_channel; +}; + +XIO_TYPES(if); + +#endif -- 2.0.0 -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@...r.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
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