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-rw-r--r--block/blk-core.c8
-rw-r--r--block/blk-lib.c41
-rw-r--r--block/blk-merge.c117
-rw-r--r--block/genhd.c2
-rw-r--r--block/ioctl.c2
-rw-r--r--block/partitions/ibm.c455
6 files changed, 389 insertions, 236 deletions
diff --git a/block/blk-core.c b/block/blk-core.c
index dc04a901302..d2da6417051 100644
--- a/block/blk-core.c
+++ b/block/blk-core.c
@@ -2252,9 +2252,11 @@ bool blk_update_request(struct request *req, int error, unsigned int nr_bytes)
error_type = "I/O";
break;
}
- printk(KERN_ERR "end_request: %s error, dev %s, sector %llu\n",
- error_type, req->rq_disk ? req->rq_disk->disk_name : "?",
- (unsigned long long)blk_rq_pos(req));
+ printk_ratelimited(KERN_ERR "end_request: %s error, dev %s, sector %llu\n",
+ error_type, req->rq_disk ?
+ req->rq_disk->disk_name : "?",
+ (unsigned long long)blk_rq_pos(req));
+
}
blk_account_io_completion(req, nr_bytes);
diff --git a/block/blk-lib.c b/block/blk-lib.c
index 2b461b496a7..19cc761cacb 100644
--- a/block/blk-lib.c
+++ b/block/blk-lib.c
@@ -44,6 +44,7 @@ int blkdev_issue_discard(struct block_device *bdev, sector_t sector,
struct request_queue *q = bdev_get_queue(bdev);
int type = REQ_WRITE | REQ_DISCARD;
unsigned int max_discard_sectors;
+ unsigned int granularity, alignment, mask;
struct bio_batch bb;
struct bio *bio;
int ret = 0;
@@ -54,18 +55,20 @@ int blkdev_issue_discard(struct block_device *bdev, sector_t sector,
if (!blk_queue_discard(q))
return -EOPNOTSUPP;
+ /* Zero-sector (unknown) and one-sector granularities are the same. */
+ granularity = max(q->limits.discard_granularity >> 9, 1U);
+ mask = granularity - 1;
+ alignment = (bdev_discard_alignment(bdev) >> 9) & mask;
+
/*
* Ensure that max_discard_sectors is of the proper
- * granularity
+ * granularity, so that requests stay aligned after a split.
*/
max_discard_sectors = min(q->limits.max_discard_sectors, UINT_MAX >> 9);
+ max_discard_sectors = round_down(max_discard_sectors, granularity);
if (unlikely(!max_discard_sectors)) {
/* Avoid infinite loop below. Being cautious never hurts. */
return -EOPNOTSUPP;
- } else if (q->limits.discard_granularity) {
- unsigned int disc_sects = q->limits.discard_granularity >> 9;
-
- max_discard_sectors &= ~(disc_sects - 1);
}
if (flags & BLKDEV_DISCARD_SECURE) {
@@ -79,25 +82,37 @@ int blkdev_issue_discard(struct block_device *bdev, sector_t sector,
bb.wait = &wait;
while (nr_sects) {
+ unsigned int req_sects;
+ sector_t end_sect;
+
bio = bio_alloc(gfp_mask, 1);
if (!bio) {
ret = -ENOMEM;
break;
}
+ req_sects = min_t(sector_t, nr_sects, max_discard_sectors);
+
+ /*
+ * If splitting a request, and the next starting sector would be
+ * misaligned, stop the discard at the previous aligned sector.
+ */
+ end_sect = sector + req_sects;
+ if (req_sects < nr_sects && (end_sect & mask) != alignment) {
+ end_sect =
+ round_down(end_sect - alignment, granularity)
+ + alignment;
+ req_sects = end_sect - sector;
+ }
+
bio->bi_sector = sector;
bio->bi_end_io = bio_batch_end_io;
bio->bi_bdev = bdev;
bio->bi_private = &bb;
- if (nr_sects > max_discard_sectors) {
- bio->bi_size = max_discard_sectors << 9;
- nr_sects -= max_discard_sectors;
- sector += max_discard_sectors;
- } else {
- bio->bi_size = nr_sects << 9;
- nr_sects = 0;
- }
+ bio->bi_size = req_sects << 9;
+ nr_sects -= req_sects;
+ sector = end_sect;
atomic_inc(&bb.done);
submit_bio(type, bio);
diff --git a/block/blk-merge.c b/block/blk-merge.c
index 160035f5488..e76279e4116 100644
--- a/block/blk-merge.c
+++ b/block/blk-merge.c
@@ -110,6 +110,49 @@ static int blk_phys_contig_segment(struct request_queue *q, struct bio *bio,
return 0;
}
+static void
+__blk_segment_map_sg(struct request_queue *q, struct bio_vec *bvec,
+ struct scatterlist *sglist, struct bio_vec **bvprv,
+ struct scatterlist **sg, int *nsegs, int *cluster)
+{
+
+ int nbytes = bvec->bv_len;
+
+ if (*bvprv && *cluster) {
+ if ((*sg)->length + nbytes > queue_max_segment_size(q))
+ goto new_segment;
+
+ if (!BIOVEC_PHYS_MERGEABLE(*bvprv, bvec))
+ goto new_segment;
+ if (!BIOVEC_SEG_BOUNDARY(q, *bvprv, bvec))
+ goto new_segment;
+
+ (*sg)->length += nbytes;
+ } else {
+new_segment:
+ if (!*sg)
+ *sg = sglist;
+ else {
+ /*
+ * If the driver previously mapped a shorter
+ * list, we could see a termination bit
+ * prematurely unless it fully inits the sg
+ * table on each mapping. We KNOW that there
+ * must be more entries here or the driver
+ * would be buggy, so force clear the
+ * termination bit to avoid doing a full
+ * sg_init_table() in drivers for each command.
+ */
+ (*sg)->page_link &= ~0x02;
+ *sg = sg_next(*sg);
+ }
+
+ sg_set_page(*sg, bvec->bv_page, nbytes, bvec->bv_offset);
+ (*nsegs)++;
+ }
+ *bvprv = bvec;
+}
+
/*
* map a request to scatterlist, return number of sg entries setup. Caller
* must make sure sg can hold rq->nr_phys_segments entries
@@ -131,41 +174,8 @@ int blk_rq_map_sg(struct request_queue *q, struct request *rq,
bvprv = NULL;
sg = NULL;
rq_for_each_segment(bvec, rq, iter) {
- int nbytes = bvec->bv_len;
-
- if (bvprv && cluster) {
- if (sg->length + nbytes > queue_max_segment_size(q))
- goto new_segment;
-
- if (!BIOVEC_PHYS_MERGEABLE(bvprv, bvec))
- goto new_segment;
- if (!BIOVEC_SEG_BOUNDARY(q, bvprv, bvec))
- goto new_segment;
-
- sg->length += nbytes;
- } else {
-new_segment:
- if (!sg)
- sg = sglist;
- else {
- /*
- * If the driver previously mapped a shorter
- * list, we could see a termination bit
- * prematurely unless it fully inits the sg
- * table on each mapping. We KNOW that there
- * must be more entries here or the driver
- * would be buggy, so force clear the
- * termination bit to avoid doing a full
- * sg_init_table() in drivers for each command.
- */
- sg->page_link &= ~0x02;
- sg = sg_next(sg);
- }
-
- sg_set_page(sg, bvec->bv_page, nbytes, bvec->bv_offset);
- nsegs++;
- }
- bvprv = bvec;
+ __blk_segment_map_sg(q, bvec, sglist, &bvprv, &sg,
+ &nsegs, &cluster);
} /* segments in rq */
@@ -199,6 +209,43 @@ new_segment:
}
EXPORT_SYMBOL(blk_rq_map_sg);
+/**
+ * blk_bio_map_sg - map a bio to a scatterlist
+ * @q: request_queue in question
+ * @bio: bio being mapped
+ * @sglist: scatterlist being mapped
+ *
+ * Note:
+ * Caller must make sure sg can hold bio->bi_phys_segments entries
+ *
+ * Will return the number of sg entries setup
+ */
+int blk_bio_map_sg(struct request_queue *q, struct bio *bio,
+ struct scatterlist *sglist)
+{
+ struct bio_vec *bvec, *bvprv;
+ struct scatterlist *sg;
+ int nsegs, cluster;
+ unsigned long i;
+
+ nsegs = 0;
+ cluster = blk_queue_cluster(q);
+
+ bvprv = NULL;
+ sg = NULL;
+ bio_for_each_segment(bvec, bio, i) {
+ __blk_segment_map_sg(q, bvec, sglist, &bvprv, &sg,
+ &nsegs, &cluster);
+ } /* segments in bio */
+
+ if (sg)
+ sg_mark_end(sg);
+
+ BUG_ON(bio->bi_phys_segments && nsegs > bio->bi_phys_segments);
+ return nsegs;
+}
+EXPORT_SYMBOL(blk_bio_map_sg);
+
static inline int ll_new_hw_segment(struct request_queue *q,
struct request *req,
struct bio *bio)
diff --git a/block/genhd.c b/block/genhd.c
index a2f3d6a5f55..6cace663a80 100644
--- a/block/genhd.c
+++ b/block/genhd.c
@@ -835,7 +835,7 @@ static void disk_seqf_stop(struct seq_file *seqf, void *v)
static void *show_partition_start(struct seq_file *seqf, loff_t *pos)
{
- static void *p;
+ void *p;
p = disk_seqf_start(seqf, pos);
if (!IS_ERR_OR_NULL(p) && !*pos)
diff --git a/block/ioctl.c b/block/ioctl.c
index 4476e0e85d1..4a85096f541 100644
--- a/block/ioctl.c
+++ b/block/ioctl.c
@@ -41,7 +41,7 @@ static int blkpg_ioctl(struct block_device *bdev, struct blkpg_ioctl_arg __user
sizeof(long long) > sizeof(long)) {
long pstart = start, plength = length;
if (pstart != start || plength != length
- || pstart < 0 || plength < 0)
+ || pstart < 0 || plength < 0 || partno > 65535)
return -EINVAL;
}
diff --git a/block/partitions/ibm.c b/block/partitions/ibm.c
index 1104acac780..47a61474e79 100644
--- a/block/partitions/ibm.c
+++ b/block/partitions/ibm.c
@@ -1,9 +1,8 @@
/*
- * File...........: linux/fs/partitions/ibm.c
* Author(s)......: Holger Smolinski <Holger.Smolinski@de.ibm.com>
* Volker Sameske <sameske@de.ibm.com>
* Bugreports.to..: <Linux390@de.ibm.com>
- * (C) IBM Corporation, IBM Deutschland Entwicklung GmbH, 1999,2000
+ * Copyright IBM Corp. 1999, 2012
*/
#include <linux/buffer_head.h>
@@ -17,17 +16,23 @@
#include "check.h"
#include "ibm.h"
+
+union label_t {
+ struct vtoc_volume_label_cdl vol;
+ struct vtoc_volume_label_ldl lnx;
+ struct vtoc_cms_label cms;
+};
+
/*
* compute the block number from a
* cyl-cyl-head-head structure
*/
-static sector_t
-cchh2blk (struct vtoc_cchh *ptr, struct hd_geometry *geo) {
-
+static sector_t cchh2blk(struct vtoc_cchh *ptr, struct hd_geometry *geo)
+{
sector_t cyl;
__u16 head;
- /*decode cylinder and heads for large volumes */
+ /* decode cylinder and heads for large volumes */
cyl = ptr->hh & 0xFFF0;
cyl <<= 12;
cyl |= ptr->cc;
@@ -40,13 +45,12 @@ cchh2blk (struct vtoc_cchh *ptr, struct hd_geometry *geo) {
* compute the block number from a
* cyl-cyl-head-head-block structure
*/
-static sector_t
-cchhb2blk (struct vtoc_cchhb *ptr, struct hd_geometry *geo) {
-
+static sector_t cchhb2blk(struct vtoc_cchhb *ptr, struct hd_geometry *geo)
+{
sector_t cyl;
__u16 head;
- /*decode cylinder and heads for large volumes */
+ /* decode cylinder and heads for large volumes */
cyl = ptr->hh & 0xFFF0;
cyl <<= 12;
cyl |= ptr->cc;
@@ -56,26 +60,243 @@ cchhb2blk (struct vtoc_cchhb *ptr, struct hd_geometry *geo) {
ptr->b;
}
+static int find_label(struct parsed_partitions *state,
+ dasd_information2_t *info,
+ struct hd_geometry *geo,
+ int blocksize,
+ sector_t *labelsect,
+ char name[],
+ char type[],
+ union label_t *label)
+{
+ Sector sect;
+ unsigned char *data;
+ sector_t testsect[3];
+ unsigned char temp[5];
+ int found = 0;
+ int i, testcount;
+
+ /* There a three places where we may find a valid label:
+ * - on an ECKD disk it's block 2
+ * - on an FBA disk it's block 1
+ * - on an CMS formatted FBA disk it is sector 1, even if the block size
+ * is larger than 512 bytes (possible if the DIAG discipline is used)
+ * If we have a valid info structure, then we know exactly which case we
+ * have, otherwise we just search through all possebilities.
+ */
+ if (info) {
+ if ((info->cu_type == 0x6310 && info->dev_type == 0x9336) ||
+ (info->cu_type == 0x3880 && info->dev_type == 0x3370))
+ testsect[0] = info->label_block;
+ else
+ testsect[0] = info->label_block * (blocksize >> 9);
+ testcount = 1;
+ } else {
+ testsect[0] = 1;
+ testsect[1] = (blocksize >> 9);
+ testsect[2] = 2 * (blocksize >> 9);
+ testcount = 3;
+ }
+ for (i = 0; i < testcount; ++i) {
+ data = read_part_sector(state, testsect[i], &sect);
+ if (data == NULL)
+ continue;
+ memcpy(label, data, sizeof(*label));
+ memcpy(temp, data, 4);
+ temp[4] = 0;
+ EBCASC(temp, 4);
+ put_dev_sector(sect);
+ if (!strcmp(temp, "VOL1") ||
+ !strcmp(temp, "LNX1") ||
+ !strcmp(temp, "CMS1")) {
+ if (!strcmp(temp, "VOL1")) {
+ strncpy(type, label->vol.vollbl, 4);
+ strncpy(name, label->vol.volid, 6);
+ } else {
+ strncpy(type, label->lnx.vollbl, 4);
+ strncpy(name, label->lnx.volid, 6);
+ }
+ EBCASC(type, 4);
+ EBCASC(name, 6);
+ *labelsect = testsect[i];
+ found = 1;
+ break;
+ }
+ }
+ if (!found)
+ memset(label, 0, sizeof(*label));
+
+ return found;
+}
+
+static int find_vol1_partitions(struct parsed_partitions *state,
+ struct hd_geometry *geo,
+ int blocksize,
+ char name[],
+ union label_t *label)
+{
+ sector_t blk;
+ int counter;
+ char tmp[64];
+ Sector sect;
+ unsigned char *data;
+ loff_t offset, size;
+ struct vtoc_format1_label f1;
+ int secperblk;
+
+ snprintf(tmp, sizeof(tmp), "VOL1/%8s:", name);
+ strlcat(state->pp_buf, tmp, PAGE_SIZE);
+ /*
+ * get start of VTOC from the disk label and then search for format1
+ * and format8 labels
+ */
+ secperblk = blocksize >> 9;
+ blk = cchhb2blk(&label->vol.vtoc, geo) + 1;
+ counter = 0;
+ data = read_part_sector(state, blk * secperblk, &sect);
+ while (data != NULL) {
+ memcpy(&f1, data, sizeof(struct vtoc_format1_label));
+ put_dev_sector(sect);
+ /* skip FMT4 / FMT5 / FMT7 labels */
+ if (f1.DS1FMTID == _ascebc['4']
+ || f1.DS1FMTID == _ascebc['5']
+ || f1.DS1FMTID == _ascebc['7']
+ || f1.DS1FMTID == _ascebc['9']) {
+ blk++;
+ data = read_part_sector(state, blk * secperblk, &sect);
+ continue;
+ }
+ /* only FMT1 and 8 labels valid at this point */
+ if (f1.DS1FMTID != _ascebc['1'] &&
+ f1.DS1FMTID != _ascebc['8'])
+ break;
+ /* OK, we got valid partition data */
+ offset = cchh2blk(&f1.DS1EXT1.llimit, geo);
+ size = cchh2blk(&f1.DS1EXT1.ulimit, geo) -
+ offset + geo->sectors;
+ offset *= secperblk;
+ size *= secperblk;
+ if (counter >= state->limit)
+ break;
+ put_partition(state, counter + 1, offset, size);
+ counter++;
+ blk++;
+ data = read_part_sector(state, blk * secperblk, &sect);
+ }
+ strlcat(state->pp_buf, "\n", PAGE_SIZE);
+
+ if (!data)
+ return -1;
+
+ return 1;
+}
+
+static int find_lnx1_partitions(struct parsed_partitions *state,
+ struct hd_geometry *geo,
+ int blocksize,
+ char name[],
+ union label_t *label,
+ sector_t labelsect,
+ loff_t i_size,
+ dasd_information2_t *info)
+{
+ loff_t offset, geo_size, size;
+ char tmp[64];
+ int secperblk;
+
+ snprintf(tmp, sizeof(tmp), "LNX1/%8s:", name);
+ strlcat(state->pp_buf, tmp, PAGE_SIZE);
+ secperblk = blocksize >> 9;
+ if (label->lnx.ldl_version == 0xf2) {
+ size = label->lnx.formatted_blocks * secperblk;
+ } else {
+ /*
+ * Formated w/o large volume support. If the sanity check
+ * 'size based on geo == size based on i_size' is true, then
+ * we can safely assume that we know the formatted size of
+ * the disk, otherwise we need additional information
+ * that we can only get from a real DASD device.
+ */
+ geo_size = geo->cylinders * geo->heads
+ * geo->sectors * secperblk;
+ size = i_size >> 9;
+ if (size != geo_size) {
+ if (!info) {
+ strlcat(state->pp_buf, "\n", PAGE_SIZE);
+ return 1;
+ }
+ if (!strcmp(info->type, "ECKD"))
+ if (geo_size < size)
+ size = geo_size;
+ /* else keep size based on i_size */
+ }
+ }
+ /* first and only partition starts in the first block after the label */
+ offset = labelsect + secperblk;
+ put_partition(state, 1, offset, size - offset);
+ strlcat(state->pp_buf, "\n", PAGE_SIZE);
+ return 1;
+}
+
+static int find_cms1_partitions(struct parsed_partitions *state,
+ struct hd_geometry *geo,
+ int blocksize,
+ char name[],
+ union label_t *label,
+ sector_t labelsect)
+{
+ loff_t offset, size;
+ char tmp[64];
+ int secperblk;
+
+ /*
+ * VM style CMS1 labeled disk
+ */
+ blocksize = label->cms.block_size;
+ secperblk = blocksize >> 9;
+ if (label->cms.disk_offset != 0) {
+ snprintf(tmp, sizeof(tmp), "CMS1/%8s(MDSK):", name);
+ strlcat(state->pp_buf, tmp, PAGE_SIZE);
+ /* disk is reserved minidisk */
+ offset = label->cms.disk_offset * secperblk;
+ size = (label->cms.block_count - 1) * secperblk;
+ } else {
+ snprintf(tmp, sizeof(tmp), "CMS1/%8s:", name);
+ strlcat(state->pp_buf, tmp, PAGE_SIZE);
+ /*
+ * Special case for FBA devices:
+ * If an FBA device is CMS formatted with blocksize > 512 byte
+ * and the DIAG discipline is used, then the CMS label is found
+ * in sector 1 instead of block 1. However, the partition is
+ * still supposed to start in block 2.
+ */
+ if (labelsect == 1)
+ offset = 2 * secperblk;
+ else
+ offset = labelsect + secperblk;
+ size = label->cms.block_count * secperblk;
+ }
+
+ put_partition(state, 1, offset, size-offset);
+ strlcat(state->pp_buf, "\n", PAGE_SIZE);
+ return 1;
+}
+
+
/*
+ * This is the main function, called by check.c
*/
int ibm_partition(struct parsed_partitions *state)
{
struct block_device *bdev = state->bdev;
int blocksize, res;
- loff_t i_size, offset, size, fmt_size;
+ loff_t i_size, offset, size;
dasd_information2_t *info;
struct hd_geometry *geo;
char type[5] = {0,};
char name[7] = {0,};
- union label_t {
- struct vtoc_volume_label_cdl vol;
- struct vtoc_volume_label_ldl lnx;
- struct vtoc_cms_label cms;
- } *label;
- unsigned char *data;
- Sector sect;
sector_t labelsect;
- char tmp[64];
+ union label_t *label;
res = 0;
blocksize = bdev_logical_block_size(bdev);
@@ -84,7 +305,6 @@ int ibm_partition(struct parsed_partitions *state)
i_size = i_size_read(bdev->bd_inode);
if (i_size == 0)
goto out_exit;
-
info = kmalloc(sizeof(dasd_information2_t), GFP_KERNEL);
if (info == NULL)
goto out_exit;
@@ -94,176 +314,45 @@ int ibm_partition(struct parsed_partitions *state)
label = kmalloc(sizeof(union label_t), GFP_KERNEL);
if (label == NULL)
goto out_nolab;
-
- if (ioctl_by_bdev(bdev, BIODASDINFO2, (unsigned long)info) != 0 ||
- ioctl_by_bdev(bdev, HDIO_GETGEO, (unsigned long)geo) != 0)
+ if (ioctl_by_bdev(bdev, HDIO_GETGEO, (unsigned long)geo) != 0)
goto out_freeall;
-
- /*
- * Special case for FBA disks: label sector does not depend on
- * blocksize.
- */
- if ((info->cu_type == 0x6310 && info->dev_type == 0x9336) ||
- (info->cu_type == 0x3880 && info->dev_type == 0x3370))
- labelsect = info->label_block;
- else
- labelsect = info->label_block * (blocksize >> 9);
-
- /*
- * Get volume label, extract name and type.
- */
- data = read_part_sector(state, labelsect, &sect);
- if (data == NULL)
- goto out_readerr;
-
- memcpy(label, data, sizeof(union label_t));
- put_dev_sector(sect);
-
- if ((!info->FBA_layout) && (!strcmp(info->type, "ECKD"))) {
- strncpy(type, label->vol.vollbl, 4);
- strncpy(name, label->vol.volid, 6);
- } else {
- strncpy(type, label->lnx.vollbl, 4);
- strncpy(name, label->lnx.volid, 6);
+ if (ioctl_by_bdev(bdev, BIODASDINFO2, (unsigned long)info) != 0) {
+ kfree(info);
+ info = NULL;
}
- EBCASC(type, 4);
- EBCASC(name, 6);
-
- res = 1;
- /*
- * Three different formats: LDL, CDL and unformated disk
- *
- * identified by info->format
- *
- * unformated disks we do not have to care about
- */
- if (info->format == DASD_FORMAT_LDL) {
- if (strncmp(type, "CMS1", 4) == 0) {
- /*
- * VM style CMS1 labeled disk
- */
- blocksize = label->cms.block_size;
- if (label->cms.disk_offset != 0) {
- snprintf(tmp, sizeof(tmp), "CMS1/%8s(MDSK):", name);
- strlcat(state->pp_buf, tmp, PAGE_SIZE);
- /* disk is reserved minidisk */
- offset = label->cms.disk_offset;
- size = (label->cms.block_count - 1)
- * (blocksize >> 9);
- } else {
- snprintf(tmp, sizeof(tmp), "CMS1/%8s:", name);
- strlcat(state->pp_buf, tmp, PAGE_SIZE);
- offset = (info->label_block + 1);
- size = label->cms.block_count
- * (blocksize >> 9);
- }
- put_partition(state, 1, offset*(blocksize >> 9),
- size-offset*(blocksize >> 9));
- } else {
- if (strncmp(type, "LNX1", 4) == 0) {
- snprintf(tmp, sizeof(tmp), "LNX1/%8s:", name);
- strlcat(state->pp_buf, tmp, PAGE_SIZE);
- if (label->lnx.ldl_version == 0xf2) {
- fmt_size = label->lnx.formatted_blocks
- * (blocksize >> 9);
- } else if (!strcmp(info->type, "ECKD")) {
- /* formated w/o large volume support */
- fmt_size = geo->cylinders * geo->heads
- * geo->sectors * (blocksize >> 9);
- } else {
- /* old label and no usable disk geometry
- * (e.g. DIAG) */
- fmt_size = i_size >> 9;
- }
- size = i_size >> 9;
- if (fmt_size < size)
- size = fmt_size;
- offset = (info->label_block + 1);
- } else {
- /* unlabeled disk */
- strlcat(state->pp_buf, "(nonl)", PAGE_SIZE);
- size = i_size >> 9;
- offset = (info->label_block + 1);
- }
- put_partition(state, 1, offset*(blocksize >> 9),
- size-offset*(blocksize >> 9));
+ if (find_label(state, info, geo, blocksize, &labelsect, name, type,
+ label)) {
+ if (!strncmp(type, "VOL1", 4)) {
+ res = find_vol1_partitions(state, geo, blocksize, name,
+ label);
+ } else if (!strncmp(type, "LNX1", 4)) {
+ res = find_lnx1_partitions(state, geo, blocksize, name,
+ label, labelsect, i_size,
+ info);
+ } else if (!strncmp(type, "CMS1", 4)) {
+ res = find_cms1_partitions(state, geo, blocksize, name,
+ label, labelsect);
}
- } else if (info->format == DASD_FORMAT_CDL) {
- /*
- * New style CDL formatted disk
- */
- sector_t blk;
- int counter;
-
+ } else if (info) {
/*
- * check if VOL1 label is available
- * if not, something is wrong, skipping partition detection
+ * ugly but needed for backward compatibility:
+ * If the block device is a DASD (i.e. BIODASDINFO2 works),
+ * then we claim it in any case, even though it has no valid
+ * label. If it has the LDL format, then we simply define a
+ * partition as if it had an LNX1 label.
*/
- if (strncmp(type, "VOL1", 4) == 0) {
- snprintf(tmp, sizeof(tmp), "VOL1/%8s:", name);
- strlcat(state->pp_buf, tmp, PAGE_SIZE);
- /*
- * get block number and read then go through format1
- * labels
- */
- blk = cchhb2blk(&label->vol.vtoc, geo) + 1;
- counter = 0;
- data = read_part_sector(state, blk * (blocksize/512),
- &sect);
- while (data != NULL) {
- struct vtoc_format1_label f1;
-
- memcpy(&f1, data,
- sizeof(struct vtoc_format1_label));
- put_dev_sector(sect);
-
- /* skip FMT4 / FMT5 / FMT7 labels */
- if (f1.DS1FMTID == _ascebc['4']
- || f1.DS1FMTID == _ascebc['5']
- || f1.DS1FMTID == _ascebc['7']
- || f1.DS1FMTID == _ascebc['9']) {
- blk++;
- data = read_part_sector(state,
- blk * (blocksize/512), &sect);
- continue;
- }
-
- /* only FMT1 and 8 labels valid at this point */
- if (f1.DS1FMTID != _ascebc['1'] &&
- f1.DS1FMTID != _ascebc['8'])
- break;
-
- /* OK, we got valid partition data */
- offset = cchh2blk(&f1.DS1EXT1.llimit, geo);
- size = cchh2blk(&f1.DS1EXT1.ulimit, geo) -
- offset + geo->sectors;
- if (counter >= state->limit)
- break;
- put_partition(state, counter + 1,
- offset * (blocksize >> 9),
- size * (blocksize >> 9));
- counter++;
- blk++;
- data = read_part_sector(state,
- blk * (blocksize/512), &sect);
- }
-
- if (!data)
- /* Are we not supposed to report this ? */
- goto out_readerr;
- } else
- printk(KERN_INFO "Expected Label VOL1 not "
- "found, treating as CDL formated Disk");
-
- }
-
- strlcat(state->pp_buf, "\n", PAGE_SIZE);
- goto out_freeall;
-
+ res = 1;
+ if (info->format == DASD_FORMAT_LDL) {
+ strlcat(state->pp_buf, "(nonl)", PAGE_SIZE);
+ size = i_size >> 9;
+ offset = (info->label_block + 1) * (blocksize >> 9);
+ put_partition(state, 1, offset, size-offset);
+ strlcat(state->pp_buf, "\n", PAGE_SIZE);
+ }
+ } else
+ res = 0;
-out_readerr:
- res = -1;
out_freeall:
kfree(label);
out_nolab:
generated by cgit v1.2.3-18-g5258 (git 2.32.0) at 2024-12-04 13:30:48 +0000