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libdm: add dm_get_status_snapshot

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Add dm_get_status_snapshot() for parsing snapshot status.
This commit is contained in:
Zdenek Kabelac 2013-05-26 16:57:50 +02:00
parent 3ba3bc0d66
commit 4707ac7200
3 changed files with 58 additions and 2 deletions
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1
WHATS_NEW_DM
View File

@ -1,5 +1,6 @@
Version 1.02.78 -
===================================
Add dm_get_status_snapshot() for parsing snapshot status.
Detecte mounted fs also via reading /proc/self/mountinfo.
Add dm_mountinfo_read() for parsing /proc/self/mountinfo.
Report error for nonexisting devices in dmeventd communication.

20
libdm/libdevmapper.h
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@ -1,6 +1,6 @@
/*
* Copyright (C) 2001-2004 Sistina Software, Inc. All rights reserved.
* Copyright (C) 2004-2011 Red Hat, Inc. All rights reserved.
* Copyright (C) 2004-2013 Red Hat, Inc. All rights reserved.
*
* This file is part of the device-mapper userspace tools.
*
@ -286,6 +286,24 @@ struct dm_status_raid {
int dm_get_status_raid(struct dm_pool *mem, const char *params,
struct dm_status_raid **status);
/*
* Snapshot target's format:
* <= 1.7.0: <used_sectors>/<total_sectors>
* >= 1.8.0: <used_sectors>/<total_sectors> <metadata_sectors>
*/
struct dm_status_snapshot {
uint64_t used_sectors; /* in 512b units */
uint64_t total_sectors;
uint64_t metadata_sectors;
unsigned has_metadata_sectors : 1; /* set when metadata_sectors is present */
unsigned invalid : 1; /* set when snapshot is invalidated */
unsigned merge_failed : 1; /* set when snapshot merge failed */
};
int dm_get_status_snapshot(struct dm_pool *mem, const char *params,
struct dm_status_snapshot **status);
/*
* Parse params from STATUS call for thin_pool target
*/

39
libdm/libdm-deptree.c
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@ -1,5 +1,5 @@
/*
* Copyright (C) 2005-2012 Red Hat, Inc. All rights reserved.
* Copyright (C) 2005-2013 Red Hat, Inc. All rights reserved.
*
* This file is part of the device-mapper userspace tools.
*
@ -2718,6 +2718,43 @@ int dm_tree_node_add_snapshot_merge_target(struct dm_tree_node *node,
merge_uuid, 1, chunk_size);
}
int dm_get_status_snapshot(struct dm_pool *mem, const char *params,
struct dm_status_snapshot **status)
{
struct dm_status_snapshot *s;
int r;
if (!params) {
log_error("Failed to parse invalid snapshot params.");
return 0;
}
if (!(s = dm_pool_zalloc(mem, sizeof(*s)))) {
log_error("Failed to allocate snapshot status structure.");
return 0;
}
r = sscanf(params, "%" PRIu64 "/%" PRIu64 " %" PRIu64,
&s->used_sectors, &s->total_sectors,
&s->metadata_sectors);
if (r == 3 || r == 2)
s->has_metadata_sectors = (r == 3);
else if (!strcmp(params, "Invalid"))
s->invalid = 1;
else if (!strcmp(params, "Merge failed"))
s->merge_failed = 1;
else {
dm_pool_free(mem, s);
log_error("Failed to parse snapshot params: %s.", params);
return 0;
}
*status = s;
return 1;
}
int dm_tree_node_add_error_target(struct dm_tree_node *node,
uint64_t size)
{