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- dasd: enhance device probing

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- fdasd: geometry handling updated from upstream s390-tools
This commit is contained in:
Brian C. Lane 2015-10-27 17:02:48 -07:00
parent 7f6b65822f
commit b965023a70
3 changed files with 526 additions and 2 deletions
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281
0021-fdasd-geometry-handling-updated-from-upstream-s390-t.patch Normal file
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@ -0,0 +1,281 @@
From 4d480d980a9b69b432b8d60df3c4397ba8cdc965 Mon Sep 17 00:00:00 2001
From: Viktor Mihajlovski <mihajlov@linux.vnet.ibm.com>
Date: Thu, 17 Sep 2015 15:33:28 +0200
Subject: [PATCH 21/22] fdasd: geometry handling updated from upstream
s390-tools
Remove the necessity for DASD-specific ioctls for partition handling.
This allows to correctly handle DASD-backed virtio block devices.
Note that this is necessary because virtio is just the transport.
A DASD, even if provided via virtio, still has it's unique
characteristics, which means that only traditional DASD partition
table formats can be used (no MBR, GPT, or similar).
Use bzero for initialization to make sure all struct members are
properly cleared. Also changed partition list handling code to be
more similar to upstream s390-tools fdasd.
Further, enhanced error handling capabilities by providing a
return code by fdasd_get_geometry.
Code is largely backported from s390-tools project.
Signed-off-by: Viktor Mihajlovski <mihajlov@linux.vnet.ibm.com>
Acked-by: Stefan Haberland <stefan.haberland@de.ibm.com>
Signed-off-by: Hendrik Brueckner <brueckner@linux.vnet.ibm.com>
Signed-off-by: Brian C. Lane <bcl@redhat.com>
---
include/parted/fdasd.in.h | 4 +-
libparted/labels/fdasd.c | 166 ++++++++++++++++++++++++++++++++--------------
2 files changed, 119 insertions(+), 51 deletions(-)
diff --git a/include/parted/fdasd.in.h b/include/parted/fdasd.in.h
index 6f6a7e0..4e351c4 100644
--- a/include/parted/fdasd.in.h
+++ b/include/parted/fdasd.in.h
@@ -190,6 +190,8 @@ typedef struct format_data_t {
#define BLKRRPART _IO(0x12,95)
/* get block device sector size */
#define BLKSSZGET _IO(0x12,104)
+/* device size in bytes (u64 *arg)*/
+#define BLKGETSIZE64 _IOR(0x12,114,size_t)
/* get device geometry */
#define HDIO_GETGEO 0x0301
@@ -285,7 +287,7 @@ enum fdasd_failure {
void fdasd_cleanup (fdasd_anchor_t *anchor);
void fdasd_initialize_anchor (fdasd_anchor_t * anc);
-void fdasd_get_geometry (const PedDevice *dev, fdasd_anchor_t *anc, int fd);
+int fdasd_get_geometry (const PedDevice *dev, fdasd_anchor_t *anc, int fd);
void fdasd_check_api_version (fdasd_anchor_t *anc, int fd);
int fdasd_check_volume (fdasd_anchor_t *anc, int fd);
int fdasd_write_labels (fdasd_anchor_t *anc, int fd);
diff --git a/libparted/labels/fdasd.c b/libparted/labels/fdasd.c
index 1f87937..7e6a77a 100644
--- a/libparted/labels/fdasd.c
+++ b/libparted/labels/fdasd.c
@@ -210,27 +210,7 @@ fdasd_initialize_anchor (fdasd_anchor_t * anc)
partition_info_t *p = NULL;
partition_info_t *q = NULL;
- anc->devno = 0;
- anc->dev_type = 0;
- anc->used_partitions = 0;
-
- anc->silent = 0;
- anc->verbose = 0;
- anc->big_disk = 0;
- anc->volid_specified = 0;
- anc->config_specified = 0;
- anc->auto_partition = 0;
- anc->devname_specified = 0;
- anc->print_table = 0;
-
- anc->option_reuse = 0;
- anc->option_recreate = 0;
-
- anc->vlabel_changed = 0;
- anc->vtoc_changed = 0;
- anc->blksize = 0;
- anc->fspace_trk = 0;
- anc->label_pos = 0;
+ bzero(anc, sizeof(fdasd_anchor_t));
for (i=0; i<USABLE_PARTITIONS; i++)
setpos(anc, i, -1);
@@ -272,24 +252,18 @@ fdasd_initialize_anchor (fdasd_anchor_t * anc)
if (p == NULL)
fdasd_error(anc, malloc_failed,
_("No room for partition info."));
- p->used = 0x00;
- p->len_trk = 0;
- p->start_trk = 0;
- p->fspace_trk = 0;
- p->type = 0;
+ bzero(p, sizeof(partition_info_t));
/* add p to double pointered list */
if (i == 1) {
- anc->first = p;
- p->prev = NULL;
+ anc->first = p;
} else if (i == USABLE_PARTITIONS) {
- anc->last = p;
- p->next = NULL;
+ anc->last = p;
p->prev = q;
q->next = p;
} else {
- p->prev = q;
- q->next = p;
+ p->prev = q;
+ q->next = p;
}
p->f1 = malloc(sizeof(format1_label_t));
@@ -947,15 +921,77 @@ fdasd_check_api_version (fdasd_anchor_t *anc, int f)
}
/*
+ * The following two functions match those in the DASD ECKD device driver.
+ * They are used to compute how many records of a given size can be stored
+ * in one track.
+ */
+static unsigned int ceil_quot(unsigned int d1, unsigned int d2)
+{
+ return (d1 + (d2 - 1)) / d2;
+}
+
+/* kl: key length, dl: data length */
+static unsigned int recs_per_track(unsigned short dev_type, unsigned int kl,
+ unsigned int dl)
+{
+ unsigned int dn, kn;
+
+ switch (dev_type) {
+ case DASD_3380_TYPE:
+ if (kl)
+ return 1499 / (15 + 7 + ceil_quot(kl + 12, 32) +
+ ceil_quot(dl + 12, 32));
+ else
+ return 1499 / (15 + ceil_quot(dl + 12, 32));
+ case DASD_3390_TYPE:
+ dn = ceil_quot(dl + 6, 232) + 1;
+ if (kl) {
+ kn = ceil_quot(kl + 6, 232) + 1;
+ return 1729 / (10 + 9 + ceil_quot(kl + 6 * kn, 34) +
+ 9 + ceil_quot(dl + 6 * dn, 34));
+ } else
+ return 1729 / (10 + 9 + ceil_quot(dl + 6 * dn, 34));
+ case DASD_9345_TYPE:
+ dn = ceil_quot(dl + 6, 232) + 1;
+ if (kl) {
+ kn = ceil_quot(kl + 6, 232) + 1;
+ return 1420 / (18 + 7 + ceil_quot(kl + 6 * kn, 34) +
+ ceil_quot(dl + 6 * dn, 34));
+ } else
+ return 1420 / (18 + 7 + ceil_quot(dl + 6 * dn, 34));
+ }
+ return 0;
+}
+
+/*
+ * Verify that number of tracks (heads) per cylinder and number of
+ * sectors per track match the expected values for a given device type
+ * and block size.
+ * Returns 1 for a valid match and 0 otherwise.
+ */
+static int fdasd_verify_geometry(unsigned short dev_type, int blksize,
+ struct fdasd_hd_geometry *geometry)
+{
+ unsigned int expected_sectors;
+ if (geometry->heads != 15)
+ return 0;
+ expected_sectors = recs_per_track(dev_type, 0, blksize);
+ if (geometry->sectors == expected_sectors)
+ return 1;
+ return 0;
+}
+
+/*
* reads dasd geometry data
*/
-void
+int
fdasd_get_geometry (const PedDevice *dev, fdasd_anchor_t *anc, int f)
{
PDEBUG
int blksize = 0;
dasd_information_t dasd_info;
struct dasd_eckd_characteristics *characteristics;
+ unsigned long long size_in_bytes;
/* We can't get geometry from a regular file,
so simulate something usable, for the sake of testing. */
@@ -979,6 +1015,12 @@ fdasd_get_geometry (const PedDevice *dev, fdasd_anchor_t *anc, int f)
anc->geo.heads;
anc->is_file = 1;
} else {
+ if (ioctl(f, BLKGETSIZE64, &size_in_bytes) != 0) {
+ fdasd_error(anc, unable_to_ioctl,
+ _("Could not retrieve disk size."));
+ goto error;
+ }
+
if (ioctl(f, HDIO_GETGEO, &anc->geo) != 0)
fdasd_error(anc, unable_to_ioctl,
_("Could not retrieve disk geometry information."));
@@ -988,27 +1030,51 @@ fdasd_get_geometry (const PedDevice *dev, fdasd_anchor_t *anc, int f)
_("Could not retrieve blocksize information."));
/* get disk type */
- if (ioctl(f, BIODASDINFO, &dasd_info) != 0)
- fdasd_error(anc, unable_to_ioctl,
- _("Could not retrieve disk information."));
-
- characteristics = (struct dasd_eckd_characteristics *)
- &dasd_info.characteristics;
- if (characteristics->no_cyl == LV_COMPAT_CYL &&
- characteristics->long_no_cyl)
- anc->hw_cylinders = characteristics->long_no_cyl;
- else
- anc->hw_cylinders = characteristics->no_cyl;
+ if (ioctl(f, BIODASDINFO, &dasd_info) != 0) {
+ /* verify that the geometry matches a 3390 DASD */
+ if (!fdasd_verify_geometry(DASD_3390_TYPE, blksize,
+ &anc->geo)) {
+ fdasd_error(anc, wrong_disk_type,
+ _("Disk geometry does not match a " \
+ "DASD device of type 3390."));
+ goto error;
+ }
+ anc->dev_type = DASD_3390_TYPE;
+ anc->hw_cylinders =
+ size_in_bytes / (blksize * anc->geo.heads * anc->geo.sectors);
+ /* The VOL1 label on a CDL formatted ECKD DASD is in block 2
+ * It will be verified later, if this position actually holds a
+ * valid label record.
+ */
+ anc->label_pos = 2 * blksize;
+ /* A devno 0 is actually a valid devno, which could exist
+ * in the system. Since we use this number only to create
+ * a default volume serial, there is no serious conflict.
+ */
+ anc->devno = 0;
+ } else {
+ characteristics = (struct dasd_eckd_characteristics *)
+ &dasd_info.characteristics;
+ if (characteristics->no_cyl == LV_COMPAT_CYL &&
+ characteristics->long_no_cyl)
+ anc->hw_cylinders = characteristics->long_no_cyl;
+ else
+ anc->hw_cylinders = characteristics->no_cyl;
+ anc->dev_type = dasd_info.dev_type;
+ anc->label_pos = dasd_info.label_block * blksize;
+ anc->devno = dasd_info.devno;
+ anc->label_block = dasd_info.label_block;
+ anc->FBA_layout = dasd_info.FBA_layout;
+ }
anc->is_file = 0;
}
- anc->dev_type = dasd_info.dev_type;
- anc->blksize = blksize;
- anc->label_pos = dasd_info.label_block * blksize;
- anc->devno = dasd_info.devno;
- anc->label_block = dasd_info.label_block;
- anc->FBA_layout = dasd_info.FBA_layout;
+ anc->blksize = blksize;
+ return 1;
+
+ error:
+ return 0;
}
/*
--
2.4.3

238
0022-dasd-enhance-device-probing.patch Normal file
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@ -0,0 +1,238 @@
From 834713b5aee1edc004f863231dd489ee3a79f536 Mon Sep 17 00:00:00 2001
From: Viktor Mihajlovski <mihajlov@linux.vnet.ibm.com>
Date: Thu, 17 Sep 2015 15:33:29 +0200
Subject: [PATCH 22/22] dasd: enhance device probing
Probe for all device/transport types as every block device
could be a DASD on s390.
Since the calculation of the minimum and optimum alignment
is different between DASDs and common fixed block disks
we need a means other than dev->type == PED_DEVICE_DASD.
For that purpose a static function _ped_device_like_dasd()
offering a DASD detection heuristic has been added to
arch/linux.c.
By always providing arch-specific alignment functions the
need for DASD-specific code could be removed from device.c.
Observe fdasd_get_geometry return code for proper error
handling.
Remove the obsolete API check as we no longer require the
DASD-specific IOCTLs.
Signed-off-by: Viktor Mihajlovski <mihajlov@linux.vnet.ibm.com>
Acked-by: Stefan Haberland <stefan.haberland@de.ibm.com>
Signed-off-by: Hendrik Brueckner <brueckner@linux.vnet.ibm.com>
Signed-off-by: Brian C. Lane <bcl@redhat.com>
---
libparted/arch/linux.c | 85 ++++++++++++++++++++++++++++++++++++++++---------
libparted/device.c | 14 +++-----
libparted/labels/dasd.c | 18 +++++------
3 files changed, 82 insertions(+), 35 deletions(-)
diff --git a/libparted/arch/linux.c b/libparted/arch/linux.c
index adc368d..9344ceb 100644
--- a/libparted/arch/linux.c
+++ b/libparted/arch/linux.c
@@ -785,9 +785,13 @@ _device_set_sector_size (PedDevice* dev)
#endif
#if defined __s390__ || defined __s390x__
+ /* The real_sector_size is currently needed for DASD layouts,
+ * so we set it unconditionally. In the long run it should
+ * be considered to use the dev->phys_sector_size in label/dasd.c.
+ */
+ arch_specific->real_sector_size = dev->sector_size;
/* Return PED_SECTOR_SIZE_DEFAULT for DASDs. */
if (dev->type == PED_DEVICE_DASD) {
- arch_specific->real_sector_size = dev->sector_size;
dev->sector_size = PED_SECTOR_SIZE_DEFAULT;
}
#endif
@@ -3167,19 +3171,72 @@ linux_disk_commit (PedDisk* disk)
{
if (disk->dev->type != PED_DEVICE_FILE) {
- /* We now require BLKPG support. If this assertion fails,
- please write to the mailing list describing your system.
- Assuming it's never triggered, ...
- FIXME: remove this assertion in 2012. */
- assert (_have_blkpg ());
+ /* We now require BLKPG support. If this assertion fails,
+ please write to the mailing list describing your system.
+ Assuming it's never triggered, ...
+ FIXME: remove this assertion in 2012. */
+ assert (_have_blkpg ());
- if (!_disk_sync_part_table (disk))
- return 0;
+ if (!_disk_sync_part_table (disk))
+ return 0;
}
return 1;
}
+#if defined __s390__ || defined __s390x__
+/**
+ * Check whether this device could be a DASD
+ *
+ * The device probing yields PED_DEVICE_DASD for native DASD transport
+ * If the block device uses a different transport (e.g. virtio)
+ * a simplified heuristic (assuming a model 3390 with 4K sectors)
+ * is applied (only) on s390x systems for this check.
+ *
+ * \return 1 if the geometry indicates this could be a DASD
+ * and 0 otherwise
+ */
+static int
+_ped_device_like_dasd(const PedDevice *dev)
+{
+ return (dev->type == PED_DEVICE_DASD)
+ || (dev->hw_geom.heads == 15
+ && dev->hw_geom.sectors == 12
+ && (dev->hw_geom.cylinders
+ * dev->hw_geom.heads
+ * dev->hw_geom.sectors
+ * dev->phys_sector_size
+ == dev->length * dev->sector_size));
+}
+
+
+
+static PedAlignment*
+s390_get_minimum_alignment(const PedDevice *dev)
+{
+#if USE_BLKID
+ return linux_get_minimum_alignment(dev);
+#else
+ return ped_alignment_new(0,
+ dev->phys_sector_size
+ / dev->sector_size);
+#endif
+}
+
+static PedAlignment*
+s390_get_optimum_alignment(const PedDevice *dev)
+{
+ /* DASD needs to use minimum alignment */
+ if (_ped_device_like_dasd(dev))
+ return s390_get_minimum_alignment(dev);
+#if USE_BLKID
+ return linux_get_optimum_alignment(dev);
+#else
+ return NULL;
+#endif
+}
+#endif
+
#if USE_BLKID
static PedAlignment*
linux_get_minimum_alignment(const PedDevice *dev)
@@ -3220,15 +3277,10 @@ linux_get_optimum_alignment(const PedDevice *dev)
&& PED_DEFAULT_ALIGNMENT % optimal_io == 0)
|| (!optimal_io && minimum_io
&& PED_DEFAULT_ALIGNMENT % minimum_io == 0)
- ) {
- /* DASD needs to use minimum alignment */
- if (dev->type == PED_DEVICE_DASD)
- return linux_get_minimum_alignment(dev);
-
+ )
return ped_alignment_new(
blkid_topology_get_alignment_offset(tp) / dev->sector_size,
PED_DEFAULT_ALIGNMENT / dev->sector_size);
- }
/* If optimal_io_size is 0 and we don't meet the other criteria
for using the device.c default, return the minimum alignment. */
@@ -3255,7 +3307,10 @@ static PedDeviceArchOps linux_dev_ops = {
sync: linux_sync,
sync_fast: linux_sync_fast,
probe_all: linux_probe_all,
-#if USE_BLKID
+#if defined __s390__ || defined __s390x__
+ get_minimum_alignment: s390_get_minimum_alignment,
+ get_optimum_alignment: s390_get_optimum_alignment,
+#elif USE_BLKID
get_minimum_alignment: linux_get_minimum_alignment,
get_optimum_alignment: linux_get_optimum_alignment,
#endif
diff --git a/libparted/device.c b/libparted/device.c
index cdcc117..36fecd2 100644
--- a/libparted/device.c
+++ b/libparted/device.c
@@ -550,16 +550,10 @@ ped_device_get_optimum_alignment(const PedDevice *dev)
/* If the arch specific code could not give as an alignment
return a default value based on the type of device. */
if (align == NULL) {
- switch (dev->type) {
- case PED_DEVICE_DASD:
- align = ped_device_get_minimum_alignment(dev);
- break;
- default:
- /* Align to a grain of 1MiB (like vista / win7) */
- align = ped_alignment_new(0,
- (PED_DEFAULT_ALIGNMENT
- / dev->sector_size));
- }
+ /* Align to a grain of 1MiB (like vista / win7) */
+ align = ped_alignment_new(0,
+ (PED_DEFAULT_ALIGNMENT
+ / dev->sector_size));
}
return align;
diff --git a/libparted/labels/dasd.c b/libparted/labels/dasd.c
index fa9414f..bb32d66 100644
--- a/libparted/labels/dasd.c
+++ b/libparted/labels/dasd.c
@@ -214,19 +214,13 @@ dasd_probe (const PedDevice *dev)
PED_ASSERT(dev != NULL);
- if (!(dev->type == PED_DEVICE_DASD
- || dev->type == PED_DEVICE_VIODASD
- || dev->type == PED_DEVICE_FILE))
- return 0;
-
arch_specific = LINUX_SPECIFIC(dev);
/* add partition test here */
fdasd_initialize_anchor(&anchor);
- fdasd_get_geometry(dev, &anchor, arch_specific->fd);
-
- fdasd_check_api_version(&anchor, arch_specific->fd);
+ if (fdasd_get_geometry(dev, &anchor, arch_specific->fd) == 0)
+ goto error_cleanup;
/* Labels are required on CDL formatted DASDs. */
if (fdasd_check_volume(&anchor, arch_specific->fd) &&
@@ -276,7 +270,9 @@ dasd_read (PedDisk* disk)
fdasd_initialize_anchor(&anchor);
- fdasd_get_geometry(disk->dev, &anchor, arch_specific->fd);
+ if (fdasd_get_geometry(disk->dev, &anchor, arch_specific->fd) == 0)
+ goto error_close_dev;
+
disk_specific->label_block = anchor.label_block;
if ((anchor.geo.cylinders * anchor.geo.heads) > BIG_DISK_SIZE)
@@ -630,7 +626,9 @@ dasd_write (const PedDisk* disk)
/* initialize the anchor */
fdasd_initialize_anchor(&anchor);
- fdasd_get_geometry(disk->dev, &anchor, arch_specific->fd);
+ if (fdasd_get_geometry(disk->dev, &anchor, arch_specific->fd) == 0)
+ goto error;
+
fdasd_check_volume(&anchor, arch_specific->fd);
memcpy(anchor.vlabel, &disk_specific->vlabel, sizeof(volume_label_t));
anchor.vlabel_changed++;
--
2.4.3

9
parted.spec
View File

@ -4,7 +4,7 @@
Summary: The GNU disk partition manipulation program
Name: parted
Version: 3.2
Release: 11%{?dist}
Release: 12%{?dist}
License: GPLv3+
Group: Applications/System
URL: http://www.gnu.org/software/parted
@ -34,7 +34,8 @@ Patch0017: 0017-libparted-Fix-possible-memory-leaks.patch
Patch0018: 0018-libparted-Stop-converting-.-in-sys-path-to.patch
Patch0019: 0019-libparted-Use-read-only-when-probing-devices-on-linu.patch
Patch0020: 0020-tests-Use-wait_for_dev_to_-functions.patch
Patch0021: 0021-fdasd-geometry-handling-updated-from-upstream-s390-t.patch
Patch0022: 0022-dasd-enhance-device-probing.patch
Buildroot: %{_tmppath}/%{name}-%{version}-%{release}-root-%(%{__id_u} -n)
BuildRequires: e2fsprogs-devel
@ -177,6 +178,10 @@ fi
%changelog
* Tue Oct 27 2015 Brian C. Lane <bcl@redhat.com> 3.2-12
- dasd: enhance device probing
- fdasd: geometry handling updated from upstream s390-tools
* Fri Aug 07 2015 Brian C. Lane <bcl@redhat.com> 3.2-11
- tests: Fix patch 0012 test for extended partition length
- UI: Avoid memory leaks