dm.c (7bf7eac8d648057519adb6fce1e31458c902212c) dm.c (51b86f9a8d1c4bb4e3862ee4b4c5f46072f7520d)
1/*
2 * Copyright (C) 2001, 2002 Sistina Software (UK) Limited.
3 * Copyright (C) 2004-2008 Red Hat, Inc. All rights reserved.
4 *
5 * This file is released under the GPL.
6 */
7
8#include "dm-core.h"

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1102 ret = ti->type->direct_access(ti, pgoff, nr_pages, kaddr, pfn);
1103
1104 out:
1105 dm_put_live_table(md, srcu_idx);
1106
1107 return ret;
1108}
1109
1/*
2 * Copyright (C) 2001, 2002 Sistina Software (UK) Limited.
3 * Copyright (C) 2004-2008 Red Hat, Inc. All rights reserved.
4 *
5 * This file is released under the GPL.
6 */
7
8#include "dm-core.h"

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1102 ret = ti->type->direct_access(ti, pgoff, nr_pages, kaddr, pfn);
1103
1104 out:
1105 dm_put_live_table(md, srcu_idx);
1106
1107 return ret;
1108}
1109
1110static bool dm_dax_supported(struct dax_device *dax_dev, struct block_device *bdev,
1111 int blocksize, sector_t start, sector_t len)
1112{
1113 struct mapped_device *md = dax_get_private(dax_dev);
1114 struct dm_table *map;
1115 int srcu_idx;
1116 bool ret;
1117
1118 map = dm_get_live_table(md, &srcu_idx);
1119 if (!map)
1120 return false;
1121
1122 ret = dm_table_supports_dax(map, blocksize);
1123
1124 dm_put_live_table(md, srcu_idx);
1125
1126 return ret;
1127}
1128
1129static size_t dm_dax_copy_from_iter(struct dax_device *dax_dev, pgoff_t pgoff,
1130 void *addr, size_t bytes, struct iov_iter *i)
1131{
1132 struct mapped_device *md = dax_get_private(dax_dev);
1133 sector_t sector = pgoff * PAGE_SECTORS;
1134 struct dm_target *ti;
1135 long ret = 0;
1136 int srcu_idx;

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1483static unsigned get_num_write_zeroes_bios(struct dm_target *ti)
1484{
1485 return ti->num_write_zeroes_bios;
1486}
1487
1488static int __send_changing_extent_only(struct clone_info *ci, struct dm_target *ti,
1489 unsigned num_bios)
1490{
1110static size_t dm_dax_copy_from_iter(struct dax_device *dax_dev, pgoff_t pgoff,
1111 void *addr, size_t bytes, struct iov_iter *i)
1112{
1113 struct mapped_device *md = dax_get_private(dax_dev);
1114 sector_t sector = pgoff * PAGE_SECTORS;
1115 struct dm_target *ti;
1116 long ret = 0;
1117 int srcu_idx;

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1464static unsigned get_num_write_zeroes_bios(struct dm_target *ti)
1465{
1466 return ti->num_write_zeroes_bios;
1467}
1468
1469static int __send_changing_extent_only(struct clone_info *ci, struct dm_target *ti,
1470 unsigned num_bios)
1471{
1491 unsigned len = ci->sector_count;
1472 unsigned len;
1492
1493 /*
1494 * Even though the device advertised support for this type of
1495 * request, that does not mean every target supports it, and
1496 * reconfiguration might also have changed that since the
1497 * check was performed.
1498 */
1499 if (!num_bios)
1500 return -EOPNOTSUPP;
1501
1473
1474 /*
1475 * Even though the device advertised support for this type of
1476 * request, that does not mean every target supports it, and
1477 * reconfiguration might also have changed that since the
1478 * check was performed.
1479 */
1480 if (!num_bios)
1481 return -EOPNOTSUPP;
1482
1483 len = min((sector_t)ci->sector_count, max_io_len_target_boundary(ci->sector, ti));
1484
1502 __send_duplicate_bios(ci, ti, num_bios, &len);
1503
1504 ci->sector += len;
1505 ci->sector_count -= len;
1506
1507 return 0;
1508}
1509

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3206 .getgeo = dm_blk_getgeo,
3207 .report_zones = dm_blk_report_zones,
3208 .pr_ops = &dm_pr_ops,
3209 .owner = THIS_MODULE
3210};
3211
3212static const struct dax_operations dm_dax_ops = {
3213 .direct_access = dm_dax_direct_access,
1485 __send_duplicate_bios(ci, ti, num_bios, &len);
1486
1487 ci->sector += len;
1488 ci->sector_count -= len;
1489
1490 return 0;
1491}
1492

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3189 .getgeo = dm_blk_getgeo,
3190 .report_zones = dm_blk_report_zones,
3191 .pr_ops = &dm_pr_ops,
3192 .owner = THIS_MODULE
3193};
3194
3195static const struct dax_operations dm_dax_ops = {
3196 .direct_access = dm_dax_direct_access,
3214 .dax_supported = dm_dax_supported,
3215 .copy_from_iter = dm_dax_copy_from_iter,
3216 .copy_to_iter = dm_dax_copy_to_iter,
3217};
3218
3219/*
3220 * module hooks
3221 */
3222module_init(dm_init);

--- 14 unchanged lines hidden --- 		3197 .copy_from_iter = dm_dax_copy_from_iter,
3198 .copy_to_iter = dm_dax_copy_to_iter,
3199};
3200
3201/*
3202 * module hooks
3203 */
3204module_init(dm_init);

--- 14 unchanged lines hidden ---