diff options
| author | Ralph Wuerthner <ralph.wuerthner@de.ibm.com> | 2016-01-12 16:00:24 +0100 |
|---|---|---|
| committer | Jeremy Allison <jra@samba.org> | 2018-01-06 00:07:17 +0100 |
| commit | 996249571d0e8f9285d1b714b1c36d66e7649271 (patch) | |
| tree | 8f21fdf268e8e4e1f6f72de7a4e2e651d8ac0600 /docs-xml | |
| parent | 326df161736abc16fb3bd35a18a3e55a44fb3c5d (diff) | |
| download | samba-996249571d0e8f9285d1b714b1c36d66e7649271.tar.gz | |
vfs_fileid: add "fstype/mntdir deny/allow list" option
When using the fsname or fsid algorithm a stat() and statfs() call is
required for all mounted file systems to generate the file_id. If e.g.
an NFS file system is unresponsive such a call might block and the smbd
process will become unresponsive. Add "fileid:fstype deny",
"fileid:fstype allow", "fileid:mntdir deny", and "fileid:mntdir allow"
options to ignore potentially unresponsive file systems.
See also https://lists.samba.org/archive/samba-technical/2016-January/111553.html
for a discussion about why this is useful.
Signed-off-by: Ralph Wuerthner <ralph.wuerthner@de.ibm.com>
Reviewed-by: Ralph Boehme <slow@samba.org>
Reviewed-by: Jeremy Allison <jra@samba.org>
Diffstat (limited to 'docs-xml')
| -rw-r--r-- | docs-xml/manpages/vfs_fileid.8.xml | 47 |
1 files changed, 47 insertions, 0 deletions
diff --git a/docs-xml/manpages/vfs_fileid.8.xml b/docs-xml/manpages/vfs_fileid.8.xml index 5a3a70e9b95..568756ba519 100644 --- a/docs-xml/manpages/vfs_fileid.8.xml +++ b/docs-xml/manpages/vfs_fileid.8.xml @@ -40,6 +40,15 @@ generates the device number based on the configured algorithm (see the "fileid:algorithm" option). </para> + + <para>When using the fsname or fsid algorithm a + <command>stat()</command> and <command>statfs()</command> call is + required for all mounted file systems to generate the file_id. If e.g. + an NFS file system is unresponsive such a call might block and the smbd + process will become unresponsive. Use the "fileid:fstype deny", + "fileid:fstype allow", "fileid:mntdir deny", or "fileid:mntdir allow" + options to ignore potentially unresponsive file systems. + </para> </refsect1> @@ -75,6 +84,44 @@ </listitem> </varlistentry> + <varlistentry> + <term>fileid:fstype deny = LIST</term> + <listitem> + <para>List of file system types to be ignored for file_id + generation. + </para> + </listitem> + </varlistentry> + + <varlistentry> + <term>fileid:fstype allow = LIST</term> + <listitem> + <para>List of file system types to be allowed for file_id + generation. If this option is set, file system types not listed + here are ignored. + </para> + </listitem> + </varlistentry> + + <varlistentry> + <term>fileid:mntdir deny = LIST</term> + <listitem> + <para>List of file system mount points to be ignored for + file_id generation. + </para> + </listitem> + </varlistentry> + + <varlistentry> + <term>fileid:mntdir allow = LIST</term> + <listitem> + <para>List of file system mount points to be allowed for file_id + generation. If this option is set, file system mount points + not listed here are ignored. + </para> + </listitem> + </varlistentry> + </variablelist> </refsect1> |