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First attempt on RAIDZ. Right now works only with right phase of the moon.

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This commit is contained in:
Vladimir 'phcoder' Serbinenko 2010-12-06 23:46:01 +01:00
parent c3b87afcd4
commit 39db1a3f75
1 changed files with 88 additions and 34 deletions
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122
grub-core/fs/zfs/zfs.c
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@ -140,7 +140,7 @@ typedef struct dnode_end
struct grub_zfs_device_desc
{
enum { DEVICE_LEAF, DEVICE_MIRROR } type;
enum { DEVICE_LEAF, DEVICE_MIRROR, DEVICE_RAIDZ } type;
grub_uint64_t id;
grub_uint64_t guid;
@ -148,6 +148,9 @@ struct grub_zfs_device_desc
unsigned n_children;
struct grub_zfs_device_desc *children;
/* Valid only for RAIDZ. */
unsigned nparity;
/* Valid only for leaf devices. */
grub_device_t dev;
grub_disk_addr_t vdev_phys_sector;
@ -290,13 +293,13 @@ zio_checksum_verify (zio_cksum_t zc, grub_uint32_t checksum,
|| (actual_cksum.zc_word[2] != zc.zc_word[2])
|| (actual_cksum.zc_word[3] != zc.zc_word[3]))
{
grub_dprintf ("zfs", "checksum %d verification failed\n", checksum);
grub_dprintf ("zfs", "actual checksum %16llx %16llx %16llx %16llx\n",
grub_dprintf ("zfs", "checksum %s verification failed\n", ci->ci_name);
grub_dprintf ("zfs", "actual checksum %016llx %016llx %016llx %016llx\n",
(unsigned long long) actual_cksum.zc_word[0],
(unsigned long long) actual_cksum.zc_word[1],
(unsigned long long) actual_cksum.zc_word[2],
(unsigned long long) actual_cksum.zc_word[3]);
grub_dprintf ("zfs", "expected checksum %16llx %16llx %16llx %16llx\n",
grub_dprintf ("zfs", "expected checksum %016llx %016llx %016llx %016llx\n",
(unsigned long long) zc.zc_word[0],
(unsigned long long) zc.zc_word[1],
(unsigned long long) zc.zc_word[2],
@ -493,21 +496,34 @@ fill_vdev_info_real (const char *nvlist,
return GRUB_ERR_NONE;
}
if (grub_strcmp (type, VDEV_TYPE_MIRROR) == 0)
if (grub_strcmp (type, VDEV_TYPE_MIRROR) == 0
|| grub_strcmp (type, VDEV_TYPE_RAIDZ) == 0)
{
int nelm, i;
fill->type = DEVICE_MIRROR;
if (grub_strcmp (type, VDEV_TYPE_MIRROR) == 0)
fill->type = DEVICE_MIRROR;
else
{
grub_uint64_t par;
fill->type = DEVICE_RAIDZ;
if (!grub_zfs_nvlist_lookup_uint64 (nvlist, "nparity", &par))
return grub_error (GRUB_ERR_BAD_FS, "couldn't find raidz parity");
fill->nparity = par;
}
nelm = grub_zfs_nvlist_lookup_nvlist_array_get_nelm (nvlist, ZPOOL_CONFIG_CHILDREN);
if (nelm <= 0)
return grub_error (GRUB_ERR_BAD_FS, "incorrect mirror VDEV");
fill->n_children = nelm;
fill->children = grub_zalloc (fill->n_children
* sizeof (fill->children[0]));
if (!fill->children)
{
fill->n_children = nelm;
fill->children = grub_zalloc (fill->n_children
* sizeof (fill->children[0]));
}
for (i = 0; i < nelm; i++)
{
@ -789,9 +805,8 @@ scan_disk (grub_device_t dev, struct grub_zfs_data *data,
}
static grub_err_t
scan_devices (struct grub_zfs_data *data, grub_uint64_t id)
scan_devices (struct grub_zfs_data *data)
{
grub_device_t dev_found = NULL;
auto int hook (const char *name);
int hook (const char *name)
{
@ -819,27 +834,29 @@ scan_devices (struct grub_zfs_data *data, grub_uint64_t id)
return 0;
}
dev_found = dev;
return 1;
return 0;
}
grub_device_iterate (hook);
if (!dev_found)
return grub_error (GRUB_ERR_BAD_FS,
"couldn't find device 0x%" PRIxGRUB_UINT64_T, id);
return GRUB_ERR_NONE;
}
static grub_err_t
read_device (grub_uint64_t sector, struct grub_zfs_device_desc *desc,
read_device (grub_uint64_t offset, struct grub_zfs_device_desc *desc,
grub_size_t len, void *buf)
{
switch (desc->type)
{
case DEVICE_LEAF:
if (!desc->dev)
return grub_error (GRUB_ERR_BAD_FS, "member drive unknown");
/* read in a data block */
return grub_disk_read (desc->dev->disk, sector, 0, len, buf);
{
grub_uint64_t sector;
sector = DVA_OFFSET_TO_PHYS_SECTOR (offset);
if (!desc->dev)
{
return grub_error (GRUB_ERR_BAD_FS, "member drive unknown");
}
/* read in a data block */
return grub_disk_read (desc->dev->disk, sector, 0, len, buf);
}
case DEVICE_MIRROR:
{
grub_err_t err;
@ -849,7 +866,7 @@ read_device (grub_uint64_t sector, struct grub_zfs_device_desc *desc,
"non-positive number of mirror children");
for (i = 0; i < desc->n_children; i++)
{
err = read_device (sector, &desc->children[i],
err = read_device (offset, &desc->children[i],
len, buf);
if (!err)
break;
@ -857,9 +874,41 @@ read_device (grub_uint64_t sector, struct grub_zfs_device_desc *desc,
}
return (grub_errno = err);
}
default:
return grub_error (GRUB_ERR_BAD_FS, "unsupported device type");
case DEVICE_RAIDZ:
{
grub_uint64_t sector;
grub_uint64_t high;
grub_uint32_t devn;
if (desc->n_children <= 0)
return grub_error (GRUB_ERR_BAD_FS,
"non-positive number of mirror children");
offset += 512;
sector = offset >> 9;
high = grub_divmod64 (sector, desc->n_children, &devn);
while (len > 0)
{
grub_size_t csize;
grub_err_t err;
csize = 0x200 * desc->n_children - (offset & 0x1ff);
if (csize > len)
csize = len;
err = read_device (high << 9, &desc->children[devn],
csize, buf);
if (err)
return err;
len -= csize;
buf = (grub_uint8_t *) buf + csize;
devn = (devn + 1) % desc->n_children;
high++;
}
}
return GRUB_ERR_NONE;
}
return grub_error (GRUB_ERR_BAD_FS, "unsupported device type");
}
static grub_err_t
@ -867,26 +916,30 @@ read_dva (const dva_t *dva,
grub_zfs_endian_t endian, struct grub_zfs_data *data,
void *buf, grub_size_t len)
{
grub_uint64_t offset, sector;
grub_uint64_t offset;
unsigned i;
grub_err_t err;
int try = 0;
offset = dva_get_offset (dva, endian);
sector = DVA_OFFSET_TO_PHYS_SECTOR (offset);
for (try = 0; try < 1; try++)
for (try = 0; try < 2; try++)
{
for (i = 0; i < data->n_devices_attached; i++)
if (data->devices_attached[i].id == DVA_GET_VDEV (dva))
return read_device (sector, &data->devices_attached[i],
len, buf);
err = scan_devices (data, DVA_GET_VDEV (dva));
{
err = read_device (offset, &data->devices_attached[i],
len, buf);
if (!err)
return GRUB_ERR_NONE;
break;
}
if (try == 1)
break;
err = scan_devices (data);
if (err)
return err;
}
return grub_error (GRUB_ERR_BAD_FS,
"couldn't find device 0x%" PRIxGRUB_UINT64_T,
DVA_GET_VDEV (dva));
return err;
}
/*
@ -2359,6 +2412,7 @@ unmount_device (struct grub_zfs_device_desc *desc)
if (!desc->original && desc->dev)
grub_device_close (desc->dev);
return;
case DEVICE_RAIDZ:
case DEVICE_MIRROR:
for (i = 0; i < desc->n_children; i++)
unmount_device (&desc->children[i]);