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clvmd: skip dev rescan after full scan

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When clvmd does a full label scan just prior to
calling _vg_read(), pass a new flag into _vg_read
to indicate that the normal rescan of VG devs is
not needed.
This commit is contained in:
David Teigland 2018-04-24 14:48:30 -05:00
parent 1fec86571f
commit 47bfac21ca
2 changed files with 9 additions and 0 deletions
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1
lib/metadata/metadata-exported.h
View File

@ -645,6 +645,7 @@ void pvcreate_params_set_defaults(struct pvcreate_params *pp);
*/
#define WARN_PV_READ 0x00000001
#define WARN_INCONSISTENT 0x00000002
#define SKIP_RESCAN 0x00000004
/*
* Utility functions

8
lib/metadata/metadata.c
View File

@ -3864,6 +3864,10 @@ static struct volume_group *_vg_read(struct cmd_context *cmd,
* we can also skip the rescan in that case.
*/
if (!cmd->can_use_one_scan || lvmcache_scan_mismatch(cmd, vgname, vgid)) {
/* the skip rescan special case is for clvmd vg_read_by_vgid */
/* FIXME: this is not a warn flag, pass this differently */
if (warn_flags & SKIP_RESCAN)
goto find_vg;
skipped_rescan = 0;
log_debug_metadata("Rescanning devices for for %s", vgname);
lvmcache_label_rescan_vg(cmd, vgname, vgid);
@ -3872,6 +3876,8 @@ static struct volume_group *_vg_read(struct cmd_context *cmd,
skipped_rescan = 1;
}
find_vg:
if (!(fmt = lvmcache_fmt_from_vgname(cmd, vgname, vgid, 0))) {
log_debug_metadata("Cache did not find fmt for vgname %s", vgname);
return_NULL;
@ -4593,6 +4599,7 @@ struct volume_group *vg_read_by_vgid(struct cmd_context *cmd,
lvmcache_destroy(cmd, 0, 0);
label_scan_destroy(cmd);
lvmcache_label_scan(cmd);
warn_flags |= SKIP_RESCAN;
}
if (!(vgname = lvmcache_vgname_from_vgid(cmd->mem, vgid))) {
@ -4623,6 +4630,7 @@ struct volume_group *vg_read_by_vgid(struct cmd_context *cmd,
lvmcache_destroy(cmd, 0, 0);
label_scan_destroy(cmd);
lvmcache_label_scan(cmd);
warn_flags |= SKIP_RESCAN;
if (!(vg = _vg_read(cmd, vgname, vgid, warn_flags, &consistent, precommitted)))
goto fail;