Hi
I could not get a custom "shadow:delimiter" for the vfs shadow_copy2
module to work successfully for me with Samba 4.6.2. I did not try
previous versions. Based on my testing it seems that an additional line
of code is needed in vfs_shadow_copy2.c as shown in the patch below
(some comment updates are included too for code readability).
Without the below patch, previous versions were not being returned by
Samba when using a shadow:delimiter. I was using a sample config of
shadow:snapprefix = ^Snap
shadow:delimiter = _._
shadow:format = %Y.%m.%d-%H.%M.%S
with sample snapshots named:
Snap_testing1_._2016.11.01-01.00.01
Snap_prerelease_._2016.12.01-01.00.02
Snap_postrelease_._2017.01.01-01.00.01
Is anyone able to use a custom shadow:delimiter successfully without any
modifications to the Samba code? If not, how do I go about getting this
patch applied?
diff -up vfs_shadow_copy2.c.orig vfs_shadow_copy2.c
--- vfs_shadow_copy2.c.orig 2017-03-31 14:53:38.722560396 +0100
+++ vfs_shadow_copy2.c 2017-04-02 22:13:41.943038415 +0100
@@ -1866,16 +1866,19 @@ static bool shadow_copy2_snapshot_to_gmt
*/
if (priv->snaps->regex != NULL) {
tmpstr = talloc_strdup(talloc_tos(), name);
- /* point "name" to the time format */
+ /* Point "name" at
<delimiter><time_format> */
name = strstr(name, priv->config->delimiter);
if (name == NULL) {
goto done;
}
- /* Extract the prefix */
+ /* Now point name at <time_format> */
+ name = name + strlen(priv->config->delimiter);
+ /* Locate the the prefix */
tmp = strstr(tmpstr, priv->config->delimiter);
if (tmp == NULL) {
goto done;
}
+ /* Trim <delimiter><time_format> from tmpstr leaving
prefix */
*tmp = '\0';
/* Parse regex */
On Sun, 2017-04-02 at 22:42 +0100, Michael Miller via samba wrote:> Hi > > I could not get a custom "shadow:delimiter" for the vfs shadow_copy2 > module to work successfully for me with Samba 4.6.2. I did not try > previous versions. Based on my testing it seems that an additional line > of code is needed in vfs_shadow_copy2.c as shown in the patch below > (some comment updates are included too for code readability). > > Without the below patch, previous versions were not being returned by > Samba when using a shadow:delimiter. I was using a sample config of > > shadow:snapprefix = ^Snap > shadow:delimiter = _._ > shadow:format = %Y.%m.%d-%H.%M.%S >I think you missed to specify delimiter in format parameter for shadow_copy2 module as below: shadow:format = _._%Y.%m.%d-%H.%M.%S If its still not working, can you please share me the logs(with log level 10) so as to debug the issue?> with sample snapshots named: > Snap_testing1_._2016.11.01-01.00.01 > Snap_prerelease_._2016.12.01-01.00.02 > Snap_postrelease_._2017.01.01-01.00.01 > > Is anyone able to use a custom shadow:delimiter successfully without any > modifications to the Samba code? If not, how do I go about getting this > patch applied? > > > diff -up vfs_shadow_copy2.c.orig vfs_shadow_copy2.c > --- vfs_shadow_copy2.c.orig 2017-03-31 14:53:38.722560396 +0100 > +++ vfs_shadow_copy2.c 2017-04-02 22:13:41.943038415 +0100 > @@ -1866,16 +1866,19 @@ static bool shadow_copy2_snapshot_to_gmt > */ > if (priv->snaps->regex != NULL) { > tmpstr = talloc_strdup(talloc_tos(), name); > - /* point "name" to the time format */ > + /* Point "name" at <delimiter><time_format> */ > name = strstr(name, priv->config->delimiter); > if (name == NULL) { > goto done; > } > - /* Extract the prefix */ > + /* Now point name at <time_format> */ > + name = name + strlen(priv->config->delimiter); > + /* Locate the the prefix */ > tmp = strstr(tmpstr, priv->config->delimiter); > if (tmp == NULL) { > goto done; > } > + /* Trim <delimiter><time_format> from tmpstr leaving > prefix */ > *tmp = '\0'; > > /* Parse regex */ >
Hi
Thank you for your reply. It is very much appreciated.
I have recompiled the source (without my patch) and when the
shadow:delimiter is included within the shadow:format Samba does work as
expected. This is consistent with the code which I patched.
However - this configuration appears to contradict the man page for
vfs_shadow which states:
shadow:delimiter
This optional parameter is used as a delimiter between
shadow:snapprefix and shadow:format. This parameter is used only
when shadow:snapprefix is set.
It states that the delimiter is the parameter *between* the snapprefix
and format. The way it is written, I did not understand it to mean that
the delimiter needs to be included within the format parameter.
If the wording is considered to be correct (which I don't) then I would
suggest that an example is included within the man page which clearly
shows the usage of the snapprefix, delimiter and format options when
used together.
Maybe something like:
shadow:snapprefix = ^\(monthly\)\{0,1\}\(daily\)\{0,1\}$
shadow:delimiter = _UTC_
shadow:format = _UTC_%Y.%m.%d-%H.%M.%S
as an example which would include the following directories:
daily_UTC_2017.02.05-01.00.01
monthly_UTC_2017.02.02-01.00.01
monthly_UTC_2017.02.03-01.00.01
and not
weekly_UTC_2017.02.04-01.00.0
Thanks again - your assistance is appreciated as it means I don't need
to try and submit a patch or maintain a separate patched version of Samba :)
Kind regards,
Mike
On 19/04/2017 07:14, Anoop C S via samba wrote:> On Sun, 2017-04-02 at 22:42 +0100, Michael Miller via samba wrote:
>> Hi
>>
>> I could not get a custom "shadow:delimiter" for the vfs
shadow_copy2
>> module to work successfully for me with Samba 4.6.2. I did not try
>> previous versions. Based on my testing it seems that an additional line
>> of code is needed in vfs_shadow_copy2.c as shown in the patch below
>> (some comment updates are included too for code readability).
>>
>> Without the below patch, previous versions were not being returned by
>> Samba when using a shadow:delimiter. I was using a sample config of
>>
>> shadow:snapprefix = ^Snap
>> shadow:delimiter = _._
>> shadow:format = %Y.%m.%d-%H.%M.%S
>>
> I think you missed to specify delimiter in format parameter for
shadow_copy2 module as below:
>
> shadow:format = _._%Y.%m.%d-%H.%M.%S
>
> If its still not working, can you please share me the logs(with log level
10) so as to debug the
> issue?
>
>> with sample snapshots named:
>> Snap_testing1_._2016.11.01-01.00.01
>> Snap_prerelease_._2016.12.01-01.00.02
>> Snap_postrelease_._2017.01.01-01.00.01
>>
>> Is anyone able to use a custom shadow:delimiter successfully without
any
>> modifications to the Samba code? If not, how do I go about getting this
>> patch applied?
>>
>>
>> diff -up vfs_shadow_copy2.c.orig vfs_shadow_copy2.c
>> --- vfs_shadow_copy2.c.orig 2017-03-31 14:53:38.722560396 +0100
>> +++ vfs_shadow_copy2.c 2017-04-02 22:13:41.943038415 +0100
>> @@ -1866,16 +1866,19 @@ static bool shadow_copy2_snapshot_to_gmt
>> */
>> if (priv->snaps->regex != NULL) {
>> tmpstr = talloc_strdup(talloc_tos(), name);
>> - /* point "name" to the time format */
>> + /* Point "name" at
<delimiter><time_format> */
>> name = strstr(name, priv->config->delimiter);
>> if (name == NULL) {
>> goto done;
>> }
>> - /* Extract the prefix */
>> + /* Now point name at <time_format> */
>> + name = name + strlen(priv->config->delimiter);
>> + /* Locate the the prefix */
>> tmp = strstr(tmpstr, priv->config->delimiter);
>> if (tmp == NULL) {
>> goto done;
>> }
>> + /* Trim <delimiter><time_format> from
tmpstr leaving
>> prefix */
>> *tmp = '\0';
>>
>> /* Parse regex */
>>