1 files changed, 0 insertions, 450 deletions

diff --git a/ANDROID_3.4.5/drivers/md/dm-stripe.c b/ANDROID_3.4.5/drivers/md/dm-stripe.c
deleted file mode 100644
index 35c94ff2..00000000
--- a/ANDROID_3.4.5/drivers/md/dm-stripe.c
+++ /dev/null
@@ -1,450 +0,0 @@
-/*
- * Copyright (C) 2001-2003 Sistina Software (UK) Limited.
- *
- * This file is released under the GPL.
- */
-
-#include <linux/device-mapper.h>
-
-#include <linux/module.h>
-#include <linux/init.h>
-#include <linux/blkdev.h>
-#include <linux/bio.h>
-#include <linux/slab.h>
-#include <linux/log2.h>
-
-#define DM_MSG_PREFIX "striped"
-#define DM_IO_ERROR_THRESHOLD 15
-
-struct stripe {
-	struct dm_dev *dev;
-	sector_t physical_start;
-
-	atomic_t error_count;
-};
-
-struct stripe_c {
-	uint32_t stripes;
-	int stripes_shift;
-	sector_t stripes_mask;
-
-	/* The size of this target / num. stripes */
-	sector_t stripe_width;
-
-	/* stripe chunk size */
-	uint32_t chunk_shift;
-	sector_t chunk_mask;
-
-	/* Needed for handling events */
-	struct dm_target *ti;
-
-	/* Work struct used for triggering events*/
-	struct work_struct trigger_event;
-
-	struct stripe stripe[0];
-};
-
-/*
- * An event is triggered whenever a drive
- * drops out of a stripe volume.
- */
-static void trigger_event(struct work_struct *work)
-{
-	struct stripe_c *sc = container_of(work, struct stripe_c,
-					   trigger_event);
-	dm_table_event(sc->ti->table);
-}
-
-static inline struct stripe_c *alloc_context(unsigned int stripes)
-{
-	size_t len;
-
-	if (dm_array_too_big(sizeof(struct stripe_c), sizeof(struct stripe),
-			     stripes))
-		return NULL;
-
-	len = sizeof(struct stripe_c) + (sizeof(struct stripe) * stripes);
-
-	return kmalloc(len, GFP_KERNEL);
-}
-
-/*
- * Parse a single <dev> <sector> pair
- */
-static int get_stripe(struct dm_target *ti, struct stripe_c *sc,
-		      unsigned int stripe, char **argv)
-{
-	unsigned long long start;
-	char dummy;
-
-	if (sscanf(argv[1], "%llu%c", &start, &dummy) != 1)
-		return -EINVAL;
-
-	if (dm_get_device(ti, argv[0], dm_table_get_mode(ti->table),
-			  &sc->stripe[stripe].dev))
-		return -ENXIO;
-
-	sc->stripe[stripe].physical_start = start;
-
-	return 0;
-}
-
-/*
- * Construct a striped mapping.
- * <number of stripes> <chunk size (2^^n)> [<dev_path> <offset>]+
- */
-static int stripe_ctr(struct dm_target *ti, unsigned int argc, char **argv)
-{
-	struct stripe_c *sc;
-	sector_t width;
-	uint32_t stripes;
-	uint32_t chunk_size;
-	char *end;
-	int r;
-	unsigned int i;
-
-	if (argc < 2) {
-		ti->error = "Not enough arguments";
-		return -EINVAL;
-	}
-
-	stripes = simple_strtoul(argv[0], &end, 10);
-	if (!stripes || *end) {
-		ti->error = "Invalid stripe count";
-		return -EINVAL;
-	}
-
-	chunk_size = simple_strtoul(argv[1], &end, 10);
-	if (*end) {
-		ti->error = "Invalid chunk_size";
-		return -EINVAL;
-	}
-
-	/*
-	 * chunk_size is a power of two
-	 */
-	if (!is_power_of_2(chunk_size) ||
-	    (chunk_size < (PAGE_SIZE >> SECTOR_SHIFT))) {
-		ti->error = "Invalid chunk size";
-		return -EINVAL;
-	}
-
-	if (ti->len & (chunk_size - 1)) {
-		ti->error = "Target length not divisible by "
-		    "chunk size";
-		return -EINVAL;
-	}
-
-	width = ti->len;
-	if (sector_div(width, stripes)) {
-		ti->error = "Target length not divisible by "
-		    "number of stripes";
-		return -EINVAL;
-	}
-
-	/*
-	 * Do we have enough arguments for that many stripes ?
-	 */
-	if (argc != (2 + 2 * stripes)) {
-		ti->error = "Not enough destinations "
-			"specified";
-		return -EINVAL;
-	}
-
-	sc = alloc_context(stripes);
-	if (!sc) {
-		ti->error = "Memory allocation for striped context "
-		    "failed";
-		return -ENOMEM;
-	}
-
-	INIT_WORK(&sc->trigger_event, trigger_event);
-
-	/* Set pointer to dm target; used in trigger_event */
-	sc->ti = ti;
-	sc->stripes = stripes;
-	sc->stripe_width = width;
-
-	if (stripes & (stripes - 1))
-		sc->stripes_shift = -1;
-	else {
-		sc->stripes_shift = ffs(stripes) - 1;
-		sc->stripes_mask = ((sector_t) stripes) - 1;
-	}
-
-	ti->split_io = chunk_size;
-	ti->num_flush_requests = stripes;
-	ti->num_discard_requests = stripes;
-
-	sc->chunk_shift = ffs(chunk_size) - 1;
-	sc->chunk_mask = ((sector_t) chunk_size) - 1;
-
-	/*
-	 * Get the stripe destinations.
-	 */
-	for (i = 0; i < stripes; i++) {
-		argv += 2;
-
-		r = get_stripe(ti, sc, i, argv);
-		if (r < 0) {
-			ti->error = "Couldn't parse stripe destination";
-			while (i--)
-				dm_put_device(ti, sc->stripe[i].dev);
-			kfree(sc);
-			return r;
-		}
-		atomic_set(&(sc->stripe[i].error_count), 0);
-	}
-
-	ti->private = sc;
-
-	return 0;
-}
-
-static void stripe_dtr(struct dm_target *ti)
-{
-	unsigned int i;
-	struct stripe_c *sc = (struct stripe_c *) ti->private;
-
-	for (i = 0; i < sc->stripes; i++)
-		dm_put_device(ti, sc->stripe[i].dev);
-
-	flush_work_sync(&sc->trigger_event);
-	kfree(sc);
-}
-
-static void stripe_map_sector(struct stripe_c *sc, sector_t sector,
-			      uint32_t *stripe, sector_t *result)
-{
-	sector_t offset = dm_target_offset(sc->ti, sector);
-	sector_t chunk = offset >> sc->chunk_shift;
-
-	if (sc->stripes_shift < 0)
-		*stripe = sector_div(chunk, sc->stripes);
-	else {
-		*stripe = chunk & sc->stripes_mask;
-		chunk >>= sc->stripes_shift;
-	}
-
-	*result = (chunk << sc->chunk_shift) | (offset & sc->chunk_mask);
-}
-
-static void stripe_map_range_sector(struct stripe_c *sc, sector_t sector,
-				    uint32_t target_stripe, sector_t *result)
-{
-	uint32_t stripe;
-
-	stripe_map_sector(sc, sector, &stripe, result);
-	if (stripe == target_stripe)
-		return;
-	*result &= ~sc->chunk_mask;			/* round down */
-	if (target_stripe < stripe)
-		*result += sc->chunk_mask + 1;		/* next chunk */
-}
-
-static int stripe_map_discard(struct stripe_c *sc, struct bio *bio,
-			      uint32_t target_stripe)
-{
-	sector_t begin, end;
-
-	stripe_map_range_sector(sc, bio->bi_sector, target_stripe, &begin);
-	stripe_map_range_sector(sc, bio->bi_sector + bio_sectors(bio),
-				target_stripe, &end);
-	if (begin < end) {
-		bio->bi_bdev = sc->stripe[target_stripe].dev->bdev;
-		bio->bi_sector = begin + sc->stripe[target_stripe].physical_start;
-		bio->bi_size = to_bytes(end - begin);
-		return DM_MAPIO_REMAPPED;
-	} else {
-		/* The range doesn't map to the target stripe */
-		bio_endio(bio, 0);
-		return DM_MAPIO_SUBMITTED;
-	}
-}
-
-static int stripe_map(struct dm_target *ti, struct bio *bio,
-		      union map_info *map_context)
-{
-	struct stripe_c *sc = ti->private;
-	uint32_t stripe;
-	unsigned target_request_nr;
-
-	if (bio->bi_rw & REQ_FLUSH) {
-		target_request_nr = map_context->target_request_nr;
-		BUG_ON(target_request_nr >= sc->stripes);
-		bio->bi_bdev = sc->stripe[target_request_nr].dev->bdev;
-		return DM_MAPIO_REMAPPED;
-	}
-	if (unlikely(bio->bi_rw & REQ_DISCARD)) {
-		target_request_nr = map_context->target_request_nr;
-		BUG_ON(target_request_nr >= sc->stripes);
-		return stripe_map_discard(sc, bio, target_request_nr);
-	}
-
-	stripe_map_sector(sc, bio->bi_sector, &stripe, &bio->bi_sector);
-
-	bio->bi_sector += sc->stripe[stripe].physical_start;
-	bio->bi_bdev = sc->stripe[stripe].dev->bdev;
-
-	return DM_MAPIO_REMAPPED;
-}
-
-/*
- * Stripe status:
- *
- * INFO
- * #stripes [stripe_name <stripe_name>] [group word count]
- * [error count 'A|D' <error count 'A|D'>]
- *
- * TABLE
- * #stripes [stripe chunk size]
- * [stripe_name physical_start <stripe_name physical_start>]
- *
- */
-
-static int stripe_status(struct dm_target *ti,
-			 status_type_t type, char *result, unsigned int maxlen)
-{
-	struct stripe_c *sc = (struct stripe_c *) ti->private;
-	char buffer[sc->stripes + 1];
-	unsigned int sz = 0;
-	unsigned int i;
-
-	switch (type) {
-	case STATUSTYPE_INFO:
-		DMEMIT("%d ", sc->stripes);
-		for (i = 0; i < sc->stripes; i++)  {
-			DMEMIT("%s ", sc->stripe[i].dev->name);
-			buffer[i] = atomic_read(&(sc->stripe[i].error_count)) ?
-				'D' : 'A';
-		}
-		buffer[i] = '\0';
-		DMEMIT("1 %s", buffer);
-		break;
-
-	case STATUSTYPE_TABLE:
-		DMEMIT("%d %llu", sc->stripes,
-			(unsigned long long)sc->chunk_mask + 1);
-		for (i = 0; i < sc->stripes; i++)
-			DMEMIT(" %s %llu", sc->stripe[i].dev->name,
-			    (unsigned long long)sc->stripe[i].physical_start);
-		break;
-	}
-	return 0;
-}
-
-static int stripe_end_io(struct dm_target *ti, struct bio *bio,
-			 int error, union map_info *map_context)
-{
-	unsigned i;
-	char major_minor[16];
-	struct stripe_c *sc = ti->private;
-
-	if (!error)
-		return 0; /* I/O complete */
-
-	if ((error == -EWOULDBLOCK) && (bio->bi_rw & REQ_RAHEAD))
-		return error;
-
-	if (error == -EOPNOTSUPP)
-		return error;
-
-	memset(major_minor, 0, sizeof(major_minor));
-	sprintf(major_minor, "%d:%d",
-		MAJOR(disk_devt(bio->bi_bdev->bd_disk)),
-		MINOR(disk_devt(bio->bi_bdev->bd_disk)));
-
-	/*
-	 * Test to see which stripe drive triggered the event
-	 * and increment error count for all stripes on that device.
-	 * If the error count for a given device exceeds the threshold
-	 * value we will no longer trigger any further events.
-	 */
-	for (i = 0; i < sc->stripes; i++)
-		if (!strcmp(sc->stripe[i].dev->name, major_minor)) {
-			atomic_inc(&(sc->stripe[i].error_count));
-			if (atomic_read(&(sc->stripe[i].error_count)) <
-			    DM_IO_ERROR_THRESHOLD)
-				schedule_work(&sc->trigger_event);
-		}
-
-	return error;
-}
-
-static int stripe_iterate_devices(struct dm_target *ti,
-				  iterate_devices_callout_fn fn, void *data)
-{
-	struct stripe_c *sc = ti->private;
-	int ret = 0;
-	unsigned i = 0;
-
-	do {
-		ret = fn(ti, sc->stripe[i].dev,
-			 sc->stripe[i].physical_start,
-			 sc->stripe_width, data);
-	} while (!ret && ++i < sc->stripes);
-
-	return ret;
-}
-
-static void stripe_io_hints(struct dm_target *ti,
-			    struct queue_limits *limits)
-{
-	struct stripe_c *sc = ti->private;
-	unsigned chunk_size = (sc->chunk_mask + 1) << 9;
-
-	blk_limits_io_min(limits, chunk_size);
-	blk_limits_io_opt(limits, chunk_size * sc->stripes);
-}
-
-static int stripe_merge(struct dm_target *ti, struct bvec_merge_data *bvm,
-			struct bio_vec *biovec, int max_size)
-{
-	struct stripe_c *sc = ti->private;
-	sector_t bvm_sector = bvm->bi_sector;
-	uint32_t stripe;
-	struct request_queue *q;
-
-	stripe_map_sector(sc, bvm_sector, &stripe, &bvm_sector);
-
-	q = bdev_get_queue(sc->stripe[stripe].dev->bdev);
-	if (!q->merge_bvec_fn)
-		return max_size;
-
-	bvm->bi_bdev = sc->stripe[stripe].dev->bdev;
-	bvm->bi_sector = sc->stripe[stripe].physical_start + bvm_sector;
-
-	return min(max_size, q->merge_bvec_fn(q, bvm, biovec));
-}
-
-static struct target_type stripe_target = {
-	.name   = "striped",
-	.version = {1, 4, 0},
-	.module = THIS_MODULE,
-	.ctr    = stripe_ctr,
-	.dtr    = stripe_dtr,
-	.map    = stripe_map,
-	.end_io = stripe_end_io,
-	.status = stripe_status,
-	.iterate_devices = stripe_iterate_devices,
-	.io_hints = stripe_io_hints,
-	.merge  = stripe_merge,
-};
-
-int __init dm_stripe_init(void)
-{
-	int r;
-
-	r = dm_register_target(&stripe_target);
-	if (r < 0) {
-		DMWARN("target registration failed");
-		return r;
-	}
-
-	return r;
-}
-
-void dm_stripe_exit(void)
-{
-	dm_unregister_target(&stripe_target);
-}