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Zero gap after PV structure on write to disk in order to make non LVM tools happier (AED's idea and patch for LVM1)

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This commit is contained in:
Heinz Mauelshagen 2002-01-29 15:52:11 +00:00
parent 6db767961b
commit f7ff4d005f
2 changed files with 37 additions and 11 deletions
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43
lib/format1/disk-rep.c
View File

@ -5,6 +5,7 @@
*/
#include "disk-rep.h"
#include "dbg_malloc.h"
#include "pool.h"
#include "xlate.h"
#include "log.h"
@ -169,7 +170,7 @@ static int _read_lvd(struct device *dev, ulong pos, struct lv_disk *disk)
static int _read_vgd(struct disk_list *data)
{
struct vg_disk *vgd = &data->vgd;
unsigned long pos = data->pvd.vg_on_disk.base;
ulong pos = data->pvd.vg_on_disk.base;
if (dev_read(data->dev, pos, sizeof(*vgd), vgd) != sizeof(*vgd))
fail;
@ -214,7 +215,7 @@ static inline int _check_lvd(struct lv_disk *lvd)
static int _read_lvs(struct disk_list *data)
{
int i, read = 0;
unsigned long pos;
ulong pos;
struct lvd_list *ll;
struct vg_disk *vgd = &data->vgd;
@ -242,7 +243,7 @@ static int _read_extents(struct disk_list *data)
{
size_t len = sizeof(struct pe_disk) * data->pvd.pe_total;
struct pe_disk *extents = pool_alloc(data->mem, len);
unsigned long pos = data->pvd.pe_on_disk.base;
ulong pos = data->pvd.pe_on_disk.base;
if (!extents)
fail;
@ -421,7 +422,7 @@ int read_pvs_in_vg(const char *vg_name, struct dev_filter *filter,
static int _write_vgd(struct disk_list *data)
{
struct vg_disk *vgd = &data->vgd;
unsigned long pos = data->pvd.vg_on_disk.base;
ulong pos = data->pvd.vg_on_disk.base;
_xlate_vgd(vgd);
if (dev_write(data->dev, pos, sizeof(*vgd), vgd) != sizeof(*vgd))
@ -470,7 +471,7 @@ static int _write_lvd(struct device *dev, ulong pos, struct lv_disk *disk)
static int _write_lvs(struct disk_list *data)
{
struct list *lvh;
unsigned long pos;
ulong pos;
pos = data->pvd.lv_on_disk.base;
@ -496,7 +497,7 @@ static int _write_extents(struct disk_list *data)
{
size_t len = sizeof(struct pe_disk) * data->pvd.pe_total;
struct pe_disk *extents = data->extents;
unsigned long pos = data->pvd.pe_on_disk.base;
ulong pos = data->pvd.pe_on_disk.base;
_xlate_extents(extents, data->pvd.pe_total);
if (dev_write(data->dev, pos, len, extents) != len)
@ -509,14 +510,34 @@ static int _write_extents(struct disk_list *data)
static int _write_pvd(struct disk_list *data)
{
struct pv_disk *disk = &data->pvd;
char *buf;
ulong pos = data->pvd.pv_on_disk.base;
ulong size = data->pvd.pv_on_disk.size;
_xlate_pvd(disk);
if (dev_write(data->dev, 0, sizeof(*disk), disk) != sizeof(*disk))
if(size < sizeof(struct pv_disk)) {
log_err("Invalid PV size.");
return 0;
}
/* Make sure that the gap between the PV structure and
the next one is zeroed in order to make non LVM tools
happy (idea from AED) */
buf = dbg_malloc(size);
if(!buf) {
log_err("Couldn't allocate temporary PV buffer.");
return 0;
}
memset(buf, 0, size);
memcpy(buf, &data->pvd, sizeof(struct pv_disk));
_xlate_pvd((struct pv_disk *)buf);
if (dev_write(data->dev, pos, size, buf) != size) {
dbg_free(buf);
fail;
}
_xlate_pvd(disk);
dbg_free(buf);
return 1;
}

5
lib/format1/format1.c
View File

@ -401,6 +401,11 @@ static int _pv_write(struct format_instance *fi, struct physical_volume *pv)
goto bad;
}
/* must be set to be able to zero gap after PV structure in
dev_write in order to make other disk tools happy */
dl->pvd.pv_on_disk.base = METADATA_BASE;
dl->pvd.pv_on_disk.size = PV_SIZE;
list_add(&pvs, &dl->list);
if (!write_disks(&pvs)) {
stack;