74 lines
1.8 KiB
Diff
74 lines
1.8 KiB
Diff
From fba28cfe2f13dd8bdae3cec76178f42b001a40ca Mon Sep 17 00:00:00 2001
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From: Jeff Layton <jlayton@samba.org>
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Date: Mon, 31 Jan 2011 15:04:35 -0500
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Subject: [PATCH] mount.cifs: don't try to alter mtab if it's a symlink
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Some distros replace /etc/mtab with a symlink to /proc/mounts. In that
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situation, mount.cifs will hang for a while trying to lock the mtab.
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/bin/mount checks to see if the mtab is a symlink. If it is or if a
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stat() call on it fails, it doesn't try to to update the mtab. Have
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mount.cifs do the same.
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Signed-off-by: Jeff Layton <jlayton@samba.org>
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---
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mount.cifs.c | 2 +-
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mount.h | 1 +
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mtab.c | 16 ++++++++++++++++
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3 files changed, 18 insertions(+), 1 deletions(-)
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diff --git a/mount.cifs.c b/mount.cifs.c
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index f537a07..5f29761 100644
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--- a/mount.cifs.c
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+++ b/mount.cifs.c
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@@ -1934,7 +1934,7 @@ mount_retry:
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goto mount_exit;
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}
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- if (!parsed_info->nomtab)
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+ if (!parsed_info->nomtab && !mtab_unusable())
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rc = add_mtab(orig_dev, mountpoint, parsed_info->flags, fstype);
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mount_exit:
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diff --git a/mount.h b/mount.h
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index 23ea4f0..d49c2ea 100644
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--- a/mount.h
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+++ b/mount.h
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@@ -32,6 +32,7 @@
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#define _PATH_MOUNTED_LOCK _PATH_MOUNTED "~"
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#define _PATH_MOUNTED_TMP _PATH_MOUNTED ".tmp"
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+extern int mtab_unusable(void);
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extern int lock_mtab(void);
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extern void unlock_mtab(void);
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diff --git a/mtab.c b/mtab.c
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index 64e7250..9cd50d8 100644
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--- a/mtab.c
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+++ b/mtab.c
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@@ -77,6 +77,22 @@ mono_time(void) {
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return ret;
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}
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+/*
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+ * See if mtab is present and whether it's a symlink. Returns errno from stat()
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+ * call or EMLINK if it's a symlink.
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+ */
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+int
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+mtab_unusable(void)
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+{
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+ struct stat mstat;
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+
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+ if(lstat(_PATH_MOUNTED, &mstat))
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+ return errno;
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+ else if (S_ISLNK(mstat.st_mode))
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+ return EMLINK;
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+ return 0;
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+}
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+
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/* Remove lock file. */
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void
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unlock_mtab (void) {
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--
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1.7.3.4
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