dm-linear.c (5e3cdecf7834a764b9d24f6e696adf3e03813fab) dm-linear.c (e76239a3748c90a8b0e197f8f4544a8ce52f126e)
1/*
2 * Copyright (C) 2001-2003 Sistina Software (UK) Limited.
3 *
4 * This file is released under the GPL.
5 */
6
7#include "dm.h"
8#include <linux/module.h>

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97
98static int linear_map(struct dm_target *ti, struct bio *bio)
99{
100 linear_map_bio(ti, bio);
101
102 return DM_MAPIO_REMAPPED;
103}
104
1/*
2 * Copyright (C) 2001-2003 Sistina Software (UK) Limited.
3 *
4 * This file is released under the GPL.
5 */
6
7#include "dm.h"
8#include <linux/module.h>

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97
98static int linear_map(struct dm_target *ti, struct bio *bio)
99{
100 linear_map_bio(ti, bio);
101
102 return DM_MAPIO_REMAPPED;
103}
104
105#ifdef CONFIG_BLK_DEV_ZONED
106static int linear_end_io(struct dm_target *ti, struct bio *bio,
107 blk_status_t *error)
108{
109 struct linear_c *lc = ti->private;
110
111 if (!*error && bio_op(bio) == REQ_OP_ZONE_REPORT)
112 dm_remap_zone_report(ti, bio, lc->start);
113
114 return DM_ENDIO_DONE;
115}
116#endif
117
118static void linear_status(struct dm_target *ti, status_type_t type,
119 unsigned status_flags, char *result, unsigned maxlen)
120{
121 struct linear_c *lc = (struct linear_c *) ti->private;
122
123 switch (type) {
124 case STATUSTYPE_INFO:
125 result[0] = '\0';

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143 * Only pass ioctls through if the device sizes match exactly.
144 */
145 if (lc->start ||
146 ti->len != i_size_read(dev->bdev->bd_inode) >> SECTOR_SHIFT)
147 return 1;
148 return 0;
149}
150
105static void linear_status(struct dm_target *ti, status_type_t type,
106 unsigned status_flags, char *result, unsigned maxlen)
107{
108 struct linear_c *lc = (struct linear_c *) ti->private;
109
110 switch (type) {
111 case STATUSTYPE_INFO:
112 result[0] = '\0';

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130 * Only pass ioctls through if the device sizes match exactly.
131 */
132 if (lc->start ||
133 ti->len != i_size_read(dev->bdev->bd_inode) >> SECTOR_SHIFT)
134 return 1;
135 return 0;
136}
137
138#ifdef CONFIG_BLK_DEV_ZONED
139static int linear_report_zones(struct dm_target *ti, sector_t sector,
140 struct blk_zone *zones, unsigned int *nr_zones,
141 gfp_t gfp_mask)
142{
143 struct linear_c *lc = (struct linear_c *) ti->private;
144 int ret;
145
146 /* Do report and remap it */
147 ret = blkdev_report_zones(lc->dev->bdev, linear_map_sector(ti, sector),
148 zones, nr_zones, gfp_mask);
149 if (ret != 0)
150 return ret;
151
152 if (*nr_zones)
153 dm_remap_zone_report(ti, lc->start, zones, nr_zones);
154 return 0;
155}
156#endif
157
151static int linear_iterate_devices(struct dm_target *ti,
152 iterate_devices_callout_fn fn, void *data)
153{
154 struct linear_c *lc = ti->private;
155
156 return fn(ti, lc->dev, lc->start, ti->len, data);
157}
158

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206#define linear_dax_copy_from_iter NULL
207#define linear_dax_copy_to_iter NULL
208#endif
209
210static struct target_type linear_target = {
211 .name = "linear",
212 .version = {1, 4, 0},
213#ifdef CONFIG_BLK_DEV_ZONED
158static int linear_iterate_devices(struct dm_target *ti,
159 iterate_devices_callout_fn fn, void *data)
160{
161 struct linear_c *lc = ti->private;
162
163 return fn(ti, lc->dev, lc->start, ti->len, data);
164}
165

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213#define linear_dax_copy_from_iter NULL
214#define linear_dax_copy_to_iter NULL
215#endif
216
217static struct target_type linear_target = {
218 .name = "linear",
219 .version = {1, 4, 0},
220#ifdef CONFIG_BLK_DEV_ZONED
214 .end_io = linear_end_io,
215 .features = DM_TARGET_PASSES_INTEGRITY | DM_TARGET_ZONED_HM,
221 .features = DM_TARGET_PASSES_INTEGRITY | DM_TARGET_ZONED_HM,
222 .report_zones = linear_report_zones,
216#else
217 .features = DM_TARGET_PASSES_INTEGRITY,
218#endif
219 .module = THIS_MODULE,
220 .ctr = linear_ctr,
221 .dtr = linear_dtr,
222 .map = linear_map,
223 .status = linear_status,

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224 .features = DM_TARGET_PASSES_INTEGRITY,
225#endif
226 .module = THIS_MODULE,
227 .ctr = linear_ctr,
228 .dtr = linear_dtr,
229 .map = linear_map,
230 .status = linear_status,

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