0   ! /* SPDX-License-Identifier: GPL-2.0-only */ /* * Copyright (C) 2003 Sistina Software * Copyright (C) 2004 - 2008 Red Hat, Inc. All rights reserved. * * Device-Mapper low-level I/O. * * This file is released under the GPL. */ #ifndef _LINUX_DM_IO_H #define _LINUX_DM_IO_H #ifdef __KERNEL__ #include #include struct dm_io_region { struct block_device *bdev; sector_t sector; sector_t count; /* If this is zero the region is ignored. */ }; struct page_list { struct page_list *next; struct page *page; }; typedef void (*io_notify_fn)(unsigned int long error, void *context); enum dm_io_mem_type { DM_IO_PAGE_LIST,/* Page list */ DM_IO_BIO, /* Bio vector */ DM_IO_VMA, /* Virtual memory area */ DM_IO_KMEM, /* Kernel memory */ }; struct dm_io_memory { enum dm_io_mem_type type; unsigned int offset; union { struct page_list *pl; struct bio *bio; void *vma; void *addr; } ptr; }; struct dm_io_notify { io_notify_fn fn; /* Callback for asynchronous requests */ void *context; /* Passed to callback */ }; /* * IO request structure */ struct dm_io_client; struct dm_io_request { blk_opf_t bi_opf; /* Request type and flags */ struct dm_io_memory mem; /* Memory to use for io */ struct dm_io_notify notify; /* Synchronous if notify.fn is NULL */ struct dm_io_client *client; /* Client memory handler */ }; /* * For async io calls, users can alternatively use the dm_io() function below * and dm_io_client_create() to create private mempools for the client. * * Create/destroy may block. */ struct dm_io_client *dm_io_client_create(void); void dm_io_client_destroy(struct dm_io_client *client); /* * IO interface using private per-client pools. * Each bit in the optional 'sync_error_bits' bitset indicates whether an * error occurred doing io to the corresponding region. */ int dm_io(struct dm_io_request *io_req, unsigned int num_regions, struct dm_io_region *region, unsigned int long *sync_error_bits, unsigned short ioprio); #endif /* __KERNEL__ */ #endif /* _LINUX_DM_IO_H */ 5 lzTҁ~EpF te_ub &=L*VBl(? ELF>H@ @8 @(0(0@@@auau33  dh   $$Std PtdQtdRtd  ``GNUGNUrx rn^68+ @  $     @   PKhDH  "!RH0I> B&  /+0134579;@BCFHIKLMOQTV\_behijmnorsuvx{|}4646ϗ,{F6ȹ6MmVf=U))n]+ (8!(8HHD55rs áB}vt~vt~-"Xr#Xr<_A<=FʈGʈT++ZIܹDZIѠ7ܹD7GG SA  |ZSA|ZSAVWSASASAeeaa+jVf??Q/zB}kKkKfTPQ@V:A;rZ;Pe PeSWASWA 60 60zD{Dجޭ*5+5CNNCKBk\ýg_p^`p^`sJLgX LgXQQPePe