File libvirt-Ignore-missing-files-on-pool-refresh.patch of Package libvirt

From e637a008907ba559470bed2d268288807e8ead3d Mon Sep 17 00:00:00 2001
Message-Id: <e637a008907ba559470bed2d268288807e8ead3d@dist-git>
From: =?UTF-8?q?J=C3=A1n=20Tomko?= <jtomko@redhat.com>
Date: Wed, 9 Apr 2014 10:56:29 +0200
Subject: [PATCH] Ignore missing files on pool refresh

If we cannot stat/open a file on pool refresh, returning -1 aborts
the refresh and the pool is undefined.

Only treat missing files as fatal unless VolOpenCheckMode is called
with the VIR_STORAGE_VOL_OPEN_ERROR flag. If this flag is missing
(when it's called from virStorageBackendProbeTarget in
virStorageBackendFileSystemRefresh), only emit a warning and return
-2 to let the caller skip over the file.

https://bugzilla.redhat.com/show_bug.cgi?id=977706
(cherry picked from commit ee640f444bbdc976bdaed305f0d64d241d275376)

Signed-off-by: Jiri Denemark <jdenemar@redhat.com>
---
 src/storage/storage_backend.c | 8 ++++++++
 1 file changed, 8 insertions(+)

diff --git a/src/storage/storage_backend.c b/src/storage/storage_backend.c
index 6a2c51d..81e00e1 100644
--- a/src/storage/storage_backend.c
+++ b/src/storage/storage_backend.c
@@ -1035,6 +1035,10 @@ virStorageBackendVolOpenCheckMode(const char *path, struct stat *sb,
     char *base = last_component(path);
 
     if (lstat(path, sb) < 0) {
+        if (errno == ENOENT && !(flags & VIR_STORAGE_VOL_OPEN_ERROR)) {
+            VIR_WARN("ignoring missing file '%s'", path);
+            return -2;
+        }
         virReportSystemError(errno,
                              _("cannot stat file '%s'"),
                              path);
@@ -1055,6 +1059,10 @@ virStorageBackendVolOpenCheckMode(const char *path, struct stat *sb,
             VIR_WARN("ignoring dangling symlink '%s'", path);
             return -2;
         }
+        if (errno == ENOENT && !(flags & VIR_STORAGE_VOL_OPEN_ERROR)) {
+            VIR_WARN("ignoring missing file '%s'", path);
+            return -2;
+        }
 
         virReportSystemError(errno,
                              _("cannot open volume '%s'"),
-- 
1.9.2