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fdc7af232a
fill in an already created dm_task. This allows common code, such as minor number selection, and read_only to be lifted.
102 lines
2.1 KiB
C
102 lines
2.1 KiB
C
/*
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* Copyright (C) 2002 Sistina Software (UK) Limited.
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*
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* This file is released under the LGPL.
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*/
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#include "ll-activate.h"
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#include "lvm-string.h"
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#include "log.h"
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#include <libdevmapper.h>
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/*
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* Emit a target for a given segment.
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* FIXME: tidy this function.
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*/
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static int _emit_target(struct dm_task *dmt, struct stripe_segment *seg)
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{
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char params[1024];
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uint64_t esize = seg->lv->vg->extent_size;
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uint32_t s, stripes = seg->stripes;
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int w = 0, tw = 0, error = 0;
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const char *no_space =
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"Insufficient space to write target parameters.";
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char *filler = "/dev/ioerror";
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char *target;
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if (stripes == 1) {
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if (!seg->area[0].pv) {
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target = "error";
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error = 1;
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}
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else
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target = "linear";
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}
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if (stripes > 1) {
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target = "striped";
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tw = lvm_snprintf(params, sizeof(params), "%u %u ",
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stripes, seg->stripe_size);
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if (tw < 0) {
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log_err(no_space);
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return 0;
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}
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w = tw;
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}
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if (!error) {
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for (s = 0; s < stripes; s++, w += tw) {
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if (!seg->area[s].pv)
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tw = lvm_snprintf(
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params + w, sizeof(params) - w,
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"%s 0%s", filler,
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s == (stripes - 1) ? "" : " ");
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else
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tw = lvm_snprintf(
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params + w, sizeof(params) - w,
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"%s %" PRIu64 "%s",
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dev_name(seg->area[s].pv->dev),
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(seg->area[s].pv->pe_start +
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(esize * seg->area[s].pe)),
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s == (stripes - 1) ? "" : " ");
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if (tw < 0) {
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log_err(no_space);
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return 0;
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}
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}
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}
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log_very_verbose("Adding target: %" PRIu64 " %" PRIu64 " %s %s",
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esize * seg->le, esize * seg->len,
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target, params);
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if (!dm_task_add_target(dmt, esize * seg->le, esize * seg->len,
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target, params)) {
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stack;
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return 0;
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}
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return 1;
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}
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int device_populate_lv(struct dm_task *dmt, struct logical_volume *lv)
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{
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struct list *segh;
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struct stripe_segment *seg;
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log_very_verbose("Generating devmapper table for %s", lv->name);
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list_iterate(segh, &lv->segments) {
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seg = list_item(segh, struct stripe_segment);
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if (!_emit_target(dmt, seg)) {
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log_error("Unable to build table for '%s'", lv->name);
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return 0;
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}
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}
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return 1;
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}
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