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logical: Clean up allocation when building regex on the fly

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Rather than a loop reallocating space to build the regex, just allocate
it once up front, then if there's more than 1 nextent, append a comma and
another regex_unit string.

Signed-off-by: John Ferlan <jferlan@redhat.com>
This commit is contained in:
John Ferlan 2016-02-01 10:26:02 -05:00
parent c6d526f33f
commit 6ec319b84f
1 changed files with 3 additions and 4 deletions
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7
src/storage/storage_backend_logical.c
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@ -120,12 +120,11 @@ virStorageBackendLogicalParseVolExtents(virStorageVolDefPtr vol,
goto cleanup;
}
if (VIR_STRDUP(regex, regex_unit) < 0)
/* Allocate space for 'nextents' regex_unit strings plus a comma for each */
if (VIR_ALLOC_N(regex, nextents * (strlen(regex_unit) + 1) + 1) < 0)
goto cleanup;
strncat(regex, regex_unit, strlen(regex_unit));
for (i = 1; i < nextents; i++) {
if (VIR_REALLOC_N(regex, strlen(regex) + strlen(regex_unit) + 2) < 0)
goto cleanup;
/* "," is the separator of "devices" field */
strcat(regex, ",");
strncat(regex, regex_unit, strlen(regex_unit));