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From 811785bdc008e9d0df7e6f3e723c5f67b40cf6de Mon Sep 17 00:00:00 2001
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Message-Id: <811785bdc008e9d0df7e6f3e723c5f67b40cf6de@dist-git>
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From: Peter Krempa <pkrempa@redhat.com>
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Date: Fri, 28 Feb 2020 10:24:33 +0100
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Subject: [PATCH] virStorageFileGetMetadataRecurse: Extract storage access
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MIME-Version: 1.0
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Content-Type: text/plain; charset=UTF-8
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Content-Transfer-Encoding: 8bit
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Extract the code that directly deals with storage. This allows further
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simplification and clarification of virStorageFileGetMetadataRecurse.
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Signed-off-by: Peter Krempa <pkrempa@redhat.com>
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Reviewed-by: Eric Blake <eblake@redhat.com>
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(cherry picked from commit 01adad0932a583b1e2183dd4401bddd8607e77c3)
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https://bugzilla.redhat.com/show_bug.cgi?id=1798148
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Message-Id: <716c58c00cec06dd469b079df124bc896665f169.1582881363.git.pkrempa@redhat.com>
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Reviewed-by: Ján Tomko <jtomko@redhat.com>
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---
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src/util/virstoragefile.c | 71 ++++++++++++++++++++++++++-------------
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1 file changed, 47 insertions(+), 24 deletions(-)
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diff --git a/src/util/virstoragefile.c b/src/util/virstoragefile.c
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index 46d55eda96..7295cebd08 100644
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--- a/src/util/virstoragefile.c
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+++ b/src/util/virstoragefile.c
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@@ -4955,31 +4955,18 @@ virStorageFileReportBrokenChain(int errcode,
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}
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-/* Recursive workhorse for virStorageFileGetMetadata. */
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static int
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-virStorageFileGetMetadataRecurse(virStorageSourcePtr src,
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- virStorageSourcePtr parent,
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- uid_t uid, gid_t gid,
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- bool report_broken,
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- virHashTablePtr cycle,
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- unsigned int depth)
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+virStorageFileGetMetadataRecurseReadHeader(virStorageSourcePtr src,
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+ virStorageSourcePtr parent,
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+ uid_t uid,
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+ gid_t gid,
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+ char **buf,
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+ size_t *headerLen,
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+ virHashTablePtr cycle)
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{
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int ret = -1;
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const char *uniqueName;
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- ssize_t headerLen;
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- int backingFormat;
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- int rv;
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- g_autofree char *buf = NULL;
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- g_autoptr(virStorageSource) backingStore = NULL;
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-
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- VIR_DEBUG("path=%s format=%d uid=%u gid=%u",
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- NULLSTR(src->path), src->format,
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- (unsigned int)uid, (unsigned int)gid);
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-
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- /* exit if we can't load information about the current image */
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- rv = virStorageFileSupportsBackingChainTraversal(src);
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- if (rv <= 0)
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- return rv;
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+ ssize_t len;
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if (virStorageFileInitAs(src, uid, gid) < 0)
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return -1;
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@@ -5002,10 +4989,47 @@ virStorageFileGetMetadataRecurse(virStorageSourcePtr src,
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if (virHashAddEntry(cycle, uniqueName, NULL) < 0)
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goto cleanup;
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- if ((headerLen = virStorageFileRead(src, 0, VIR_STORAGE_MAX_HEADER,
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- &buf)) < 0)
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+ if ((len = virStorageFileRead(src, 0, VIR_STORAGE_MAX_HEADER, buf)) < 0)
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goto cleanup;
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+ *headerLen = len;
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+ ret = 0;
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+
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+ cleanup:
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+ virStorageFileDeinit(src);
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+ return ret;
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+}
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+
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+
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+/* Recursive workhorse for virStorageFileGetMetadata. */
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+static int
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+virStorageFileGetMetadataRecurse(virStorageSourcePtr src,
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+ virStorageSourcePtr parent,
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+ uid_t uid, gid_t gid,
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+ bool report_broken,
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+ virHashTablePtr cycle,
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+ unsigned int depth)
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+{
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+ int ret = -1;
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+ size_t headerLen;
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+ int backingFormat;
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+ int rv;
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+ g_autofree char *buf = NULL;
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+ g_autoptr(virStorageSource) backingStore = NULL;
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+
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+ VIR_DEBUG("path=%s format=%d uid=%u gid=%u",
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+ NULLSTR(src->path), src->format,
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+ (unsigned int)uid, (unsigned int)gid);
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+
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+ /* exit if we can't load information about the current image */
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+ rv = virStorageFileSupportsBackingChainTraversal(src);
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+ if (rv <= 0)
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+ return rv;
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+
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+ if (virStorageFileGetMetadataRecurseReadHeader(src, parent, uid, gid,
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+ &buf, &headerLen, cycle) < 0)
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+ return -1;
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+
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if (virStorageFileGetMetadataInternal(src, buf, headerLen,
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&backingFormat) < 0)
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goto cleanup;
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@@ -5081,7 +5105,6 @@ virStorageFileGetMetadataRecurse(virStorageSourcePtr src,
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ret = 0;
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cleanup:
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- virStorageFileDeinit(src);
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return ret;
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}
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--
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2.25.1
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