shaba/lvm2
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Allow mirror images to be resized.

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This commit is contained in:
Alasdair Kergon 2005-06-03 19:48:19 +00:00
parent c77de77790
commit ffb0e5387b
5 changed files with 79 additions and 10 deletions
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1
WHATS_NEW
View File

@ -1,5 +1,6 @@
Version 2.01.11 -
==============================
Allow mirror images to be resized.
Allow mirror images to have more than one segment.
Centralise restrictions on LV names.
Always insert an intermediate layer for mirrors.

23
lib/metadata/lv_manip.c
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@ -300,7 +300,7 @@ static struct alloc_handle *_alloc_init(struct pool *mem,
uint32_t s, area_count;
if (stripes > 1 && mirrors > 1) {
log_error("striped mirrors are not supported yet");
log_error("Striped mirrors are not supported yet");
return NULL;
}
@ -980,7 +980,9 @@ int lv_extend(struct logical_volume *lv,
alloc_policy_t alloc)
{
int r = 1;
uint32_t m;
struct alloc_handle *ah;
struct lv_segment *first_seg;
if (segtype_is_virtual(segtype))
return lv_add_virtual_segment(lv, status, extents, segtype);
@ -992,11 +994,30 @@ int lv_extend(struct logical_volume *lv,
return 0;
}
if (!mirrors) {
if (!lv_add_segment(ah, 0, ah->area_count, lv, segtype, stripe_size,
mirrored_pv, mirrored_pe, status, 0, NULL)) {
stack;
goto out;
}
} else {
list_iterate_items(first_seg, &lv->segments)
break;
for (m = 0; m < mirrors; m++) {
if (!lv_add_segment(ah, m, 1, seg_lv(first_seg, m),
get_segtype_from_string(lv->vg->cmd,
"striped"),
0, NULL, 0, 0, 0, NULL)) {
log_error("Aborting. Failed to extend %s.",
seg_lv(first_seg, m)->name);
return 0;
}
}
first_seg->area_len += extents;
first_seg->len += extents;
lv->le_count += extents;
lv->size += (uint64_t) extents *lv->vg->extent_size;
}
out:
alloc_destroy(ah);

6
tools/commands.h
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@ -178,6 +178,7 @@ xx(lvextend,
"\t[-i|--stripes Stripes [-I|--stripesize StripeSize]]\n"
"\t{-l|--extents [+]LogicalExtentsNumber |\n"
"\t -L|--size [+]LogicalVolumeSize[kKmMgGtT]}\n"
"\t[-m|--mirrors Mirrors]\n"
"\t[-n|--nofsck]\n"
"\t[-r|--resizefs]\n"
"\t[-t|--test]\n"
@ -186,8 +187,9 @@ xx(lvextend,
"\t[--version]" "\n"
"\tLogicalVolume[Path] [ PhysicalVolumePath... ]\n",
alloc_ARG, autobackup_ARG, extents_ARG, nofsck_ARG, resizefs_ARG,
size_ARG, stripes_ARG, stripesize_ARG, test_ARG, type_ARG)
alloc_ARG, autobackup_ARG, extents_ARG, mirrors_ARG, nofsck_ARG,
resizefs_ARG, size_ARG, stripes_ARG, stripesize_ARG, test_ARG,
type_ARG)
xx(lvmchange,
"With the device mapper, this is obsolete and does nothing.",

5
tools/lvcreate.c
View File

@ -497,6 +497,11 @@ static int _lvcreate(struct cmd_context *cmd, struct lvcreate_params *lp)
return 0;
}
if (lp->mirrors && !(vg->fid->fmt->features & FMT_SEGMENTS)) {
log_error("Metadata does not support mirroring.");
return 0;
}
/*
* Create the pv list.
*/

48
tools/lvresize.c
View File

@ -23,6 +23,7 @@ struct lvresize_params {
uint32_t stripes;
uint32_t stripe_size;
uint32_t mirrors;
struct segment_type *segtype;
@ -119,6 +120,7 @@ static int _lvresize(struct cmd_context *cmd, struct lvresize_params *lp)
struct lvinfo info;
uint32_t stripesize_extents = 0;
uint32_t seg_stripes = 0, seg_stripesize = 0, seg_size = 0;
uint32_t seg_mirrors = 0;
uint32_t extents_used = 0;
uint32_t size_rest;
alloc_policy_t alloc;
@ -161,6 +163,13 @@ static int _lvresize(struct cmd_context *cmd, struct lvresize_params *lp)
log_print("Varied striping not supported. Ignoring.");
}
if (arg_count(cmd, mirrors_ARG)) {
if (vg->fid->fmt->features & FMT_SEGMENTS)
lp->mirrors = arg_uint_value(cmd, mirrors_ARG, 1) + 1;
else
log_print("Mirrors not supported. Ignoring.");
}
if (arg_count(cmd, stripesize_ARG)) {
if (arg_sign_value(cmd, stripesize_ARG, 0) == SIGN_MINUS) {
log_error("Stripesize may not be negative.");
@ -171,6 +180,10 @@ static int _lvresize(struct cmd_context *cmd, struct lvresize_params *lp)
stripesize_ARG, 0);
else
log_print("Varied stripesize not supported. Ignoring.");
if (lp->mirrors) {
log_error("Mirrors and striping cannot be combined yet.");
return ECMD_FAILED;
}
}
lv = lvl->lv;
@ -277,13 +290,34 @@ static int _lvresize(struct cmd_context *cmd, struct lvresize_params *lp)
}
}
/* If extending, find mirrors of last segment */
if ((lp->extents > lv->le_count)) {
list_iterate_back_items(seg, &lv->segments) {
if (seg_is_mirrored(seg))
seg_mirrors = seg->area_count;
else
seg_mirrors = 0;
break;
}
if (!arg_count(cmd, mirrors_ARG) && seg_mirrors) {
log_print("Extending %" PRIu32 " mirror images.",
seg_mirrors);
lp->mirrors = seg_mirrors;
}
if ((arg_count(cmd, mirrors_ARG) || seg_mirrors) &&
(lp->mirrors != seg_mirrors)) {
log_error("Cannot vary number of mirrors in LV yet.");
return EINVALID_CMD_LINE;
}
}
/* If reducing, find stripes, stripesize & size of last segment */
if (lp->extents < lv->le_count) {
extents_used = 0;
if (lp->stripes || lp->stripe_size)
log_error("Ignoring stripes and stripesize arguments "
"when reducing");
if (lp->stripes || lp->stripe_size || lp->mirrors)
log_error("Ignoring stripes, stripesize and mirrors "
"arguments when reducing");
list_iterate_items(seg, &lv->segments) {
seg_extents = seg->len;
@ -293,6 +327,11 @@ static int _lvresize(struct cmd_context *cmd, struct lvresize_params *lp)
seg_stripes = seg->area_count;
}
if (seg_is_mirrored(seg))
seg_mirrors = seg->area_count;
else
seg_mirrors = 0;
if (lp->extents <= extents_used + seg_extents)
break;
@ -302,6 +341,7 @@ static int _lvresize(struct cmd_context *cmd, struct lvresize_params *lp)
seg_size = lp->extents - extents_used;
lp->stripe_size = seg_stripesize;
lp->stripes = seg_stripes;
lp->mirrors = seg_mirrors;
}
if (lp->stripes > 1 && !lp->stripe_size) {
@ -456,7 +496,7 @@ static int _lvresize(struct cmd_context *cmd, struct lvresize_params *lp)
return ECMD_FAILED;
}
} else if (!lv_extend(lv, lp->segtype, lp->stripes,
lp->stripe_size, 0u,
lp->stripe_size, lp->mirrors,
lp->extents - lv->le_count,
NULL, 0u, 0u, pvh, alloc)) {
stack;