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segments: mark more of them unzeroable

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Use segment flags to avoid zeroing of cache, cache pool
snapshot and thin pool segments.

We never want to zero these segment types.

Note:
Snapshot COW and Cache origin are created as stripes
thus are then properly zeroed.
This commit is contained in:
Zdenek Kabelac 2014-10-20 14:57:24 +02:00
parent 784c216d2b
commit 298de1f5c3
4 changed files with 4 additions and 3 deletions
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1
WHATS_NEW
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@ -1,5 +1,6 @@
Version 2.02.112 -
=====================================
Mark pools and snapshots as unzeroable volumes.
Check for zeroing of volume after segment type is fully detected.
Better support for persistent major and minor options with lvcreate.
Refactor lvcreate towards more complete validation of all supported options.

2
lib/cache_segtype/cache.c
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@ -391,7 +391,7 @@ int init_cache_segtypes(struct cmd_context *cmd,
segtype->cmd = cmd;
segtype->name = "cache-pool";
segtype->flags = SEG_CACHE_POOL;
segtype->flags = SEG_CACHE_POOL | SEG_CANNOT_BE_ZEROED;
segtype->ops = &_cache_pool_ops;
segtype->private = NULL;

2
lib/snapshot/snapshot.c
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@ -262,7 +262,7 @@ struct segment_type *init_segtype(struct cmd_context *cmd)
segtype->ops = &_snapshot_ops;
segtype->name = "snapshot";
segtype->private = NULL;
segtype->flags = SEG_SNAPSHOT;
segtype->flags = SEG_SNAPSHOT | SEG_CANNOT_BE_ZEROED;
#ifdef DEVMAPPER_SUPPORT
# ifdef DMEVENTD

2
lib/thin/thin.c
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@ -753,7 +753,7 @@ int init_multiple_segtypes(struct cmd_context *cmd, struct segtype_library *segl
const char name[16];
uint32_t flags;
} reg_segtypes[] = {
{ &_thin_pool_ops, "thin-pool", SEG_THIN_POOL },
{ &_thin_pool_ops, "thin-pool", SEG_THIN_POOL | SEG_CANNOT_BE_ZEROED },
/* FIXME Maybe use SEG_THIN_VOLUME instead of SEG_VIRTUAL */
{ &_thin_ops, "thin", SEG_THIN_VOLUME | SEG_VIRTUAL }
};