/* * iSCSI over TCP/IP Data-Path lib * * Copyright (C) 2008 Mike Christie * Copyright (C) 2008 Red Hat, Inc. All rights reserved. * maintained by open-iscsi@googlegroups.com * * This program is free software; you can redistribute it and/or modify * it under the terms of the GNU General Public License as published * by the Free Software Foundation; either version 2 of the License, or * (at your option) any later version. * * This program is distributed in the hope that it will be useful, but * WITHOUT ANY WARRANTY; without even the implied warranty of * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU * General Public License for more details. * * See the file COPYING included with this distribution for more details. */ #ifndef LIBISCSI_TCP_H #define LIBISCSI_TCP_H #include struct iscsi_tcp_conn; struct iscsi_segment; struct sk_buff; struct ahash_request; typedef int iscsi_segment_done_fn_t(struct iscsi_tcp_conn *, struct iscsi_segment *); struct iscsi_segment { unsigned char *data; unsigned int size; unsigned int copied; unsigned int total_size; unsigned int total_copied; struct ahash_request *hash; unsigned char padbuf[ISCSI_PAD_LEN]; unsigned char recv_digest[ISCSI_DIGEST_SIZE]; unsigned char digest[ISCSI_DIGEST_SIZE]; unsigned int digest_len; struct scatterlist *sg; void *sg_mapped; unsigned int sg_offset; bool atomic_mapped; iscsi_segment_done_fn_t *done; }; /* Socket connection receive helper */ struct iscsi_tcp_recv { struct iscsi_hdr *hdr; struct iscsi_segment segment; /* Allocate buffer for BHS + AHS */ uint32_t hdr_buf[64]; /* copied and flipped values */ int datalen; }; struct iscsi_tcp_conn { struct iscsi_conn *iscsi_conn; void *dd_data; int stop_stage; /* conn_stop() flag: * * stop to recover, * * stop to terminate */ /* control data */ struct iscsi_tcp_recv in; /* TCP receive context */ /* CRC32C (Rx) LLD should set this is they do not offload */ struct ahash_request *rx_hash; }; struct iscsi_tcp_task { uint32_t exp_datasn; /* expected target's R2TSN/DataSN */ int data_offset; struct iscsi_r2t_info *r2t; /* in progress solict R2T */ struct iscsi_pool r2tpool; struct kfifo r2tqueue; void *dd_data; spinlock_t pool2queue; spinlock_t queue2pool; }; enum { ISCSI_TCP_SEGMENT_DONE, /* curr seg has been processed */ ISCSI_TCP_SKB_DONE, /* skb is out of data */ ISCSI_TCP_CONN_ERR, /* iscsi layer has fired a conn err */ ISCSI_TCP_SUSPENDED, /* conn is suspended */ }; extern void iscsi_tcp_hdr_recv_prep(struct iscsi_tcp_conn *tcp_conn); extern int iscsi_tcp_recv_skb(struct iscsi_conn *conn, struct sk_buff *skb, unsigned int offset, bool offloaded, int *status); extern void iscsi_tcp_cleanup_task(struct iscsi_task *task); extern int iscsi_tcp_task_init(struct iscsi_task *task); extern int iscsi_tcp_task_xmit(struct iscsi_task *task); /* segment helpers */ extern int iscsi_tcp_recv_segment_is_hdr(struct iscsi_tcp_conn *tcp_conn); extern int iscsi_tcp_segment_done(struct iscsi_tcp_conn *tcp_conn, struct iscsi_segment *segment, int recv, unsigned copied); extern void iscsi_tcp_segment_unmap(struct iscsi_segment *segment); extern void iscsi_segment_init_linear(struct iscsi_segment *segment, void *data, size_t size, iscsi_segment_done_fn_t *done, struct ahash_request *hash); extern int iscsi_segment_seek_sg(struct iscsi_segment *segment, struct scatterlist *sg_list, unsigned int sg_count, unsigned int offset, size_t size, iscsi_segment_done_fn_t *done, struct ahash_request *hash); /* digest helpers */ extern void iscsi_tcp_dgst_header(struct ahash_request *hash, const void *hdr, size_t hdrlen, unsigned char digest[ISCSI_DIGEST_SIZE]); extern struct iscsi_cls_conn * iscsi_tcp_conn_setup(struct iscsi_cls_session *cls_session, int dd_data_size, uint32_t conn_idx); extern void iscsi_tcp_conn_teardown(struct iscsi_cls_conn *cls_conn); /* misc helpers */ extern int iscsi_tcp_r2tpool_alloc(struct iscsi_session *session); extern void iscsi_tcp_r2tpool_free(struct iscsi_session *session); extern int iscsi_tcp_set_max_r2t(struct iscsi_conn *conn, char *buf); extern void iscsi_tcp_conn_get_stats(struct iscsi_cls_conn *cls_conn, struct iscsi_stats *stats); #endif /* LIBISCSI_TCP_H */ /option>
authorChristoph Hellwig <hch@lst.de>2017-02-05 18:10:35 +0100
committerJens Axboe <axboe@fb.com>2017-02-06 09:34:46 -0700
commiteeeefd41843218c55a8782a6920f044d9bf6207a (patch)
treec342eac46626e62745aa8e1a982626efca8b121d /sound/soc/codecs/wm9081.c
parentc14024dbb156c8392908aaa822097d27c6af8ec8 (diff)
block: don't try Write Same from __blkdev_issue_zeroout
Write Same can return an error asynchronously if it turns out the underlying SCSI device does not support Write Same, which makes a proper fallback to other methods in __blkdev_issue_zeroout impossible. Thus only issue a Write Same from blkdev_issue_zeroout an don't try it at all from __blkdev_issue_zeroout as a non-invasive workaround. Signed-off-by: Christoph Hellwig <hch@lst.de> Reported-by: Junichi Nomura <j-nomura@ce.jp.nec.com> Fixes: e73c23ff ("block: add async variant of blkdev_issue_zeroout") Tested-by: Junichi Nomura <j-nomura@ce.jp.nec.com> Signed-off-by: Jens Axboe <axboe@fb.com>
Diffstat (limited to 'sound/soc/codecs/wm9081.c')