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Improve data directory write checking for NFS mounts 

If `is_writable()` fails, fall back to logic that attempts to create a file
and then checks if it exists. If this check fails, an error occurs as it
did before.

Discussion on this solution was found here:
https://help.nextcloud.com/t/write-errors-for-nfs-mount/23328

Fixes #7124

Signed-off-by: Robert Dailey <rcdailey@gmail.com>
This commit is contained in:
Robert Dailey 2018-12-22 11:14:55 -06:00
parent 20854f463b
commit a170bf80ec
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GPG Key ID: 97751323F0627314
1 changed files with 15 additions and 7 deletions
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22
lib/private/legacy/util.php
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@ -43,6 +43,7 @@
* @author Victor Dubiniuk <dubiniuk@owncloud.com>
* @author Vincent Petry <pvince81@owncloud.com>
* @author Volkan Gezer <volkangezer@gmail.com>
* @author Robert Dailey <rcdailey@gmail.com>
*
* @license AGPL-3.0
*
@ -789,13 +790,20 @@ class OC_Util {
];
}
} else if (!is_writable($CONFIG_DATADIRECTORY) or !is_readable($CONFIG_DATADIRECTORY)) {
//common hint for all file permissions error messages
$permissionsHint = $l->t('Permissions can usually be fixed by giving the webserver write access to the root directory. See %s.',
[$urlGenerator->linkToDocs('admin-dir_permissions')]);
$errors[] = [
'error' => 'Your data directory is not writable',
'hint' => $permissionsHint
];
// is_writable doesn't work for NFS mounts, so try to write a file and check if it exists.
$testFile = sprintf('%s/%s.tmp', $CONFIG_DATADIRECTORY, uniqid('data_dir_writability_test_'));
$handle = fopen($testFile, 'w');
if (!$handle || fwrite($handle, 'Test write operation') === FALSE) {
$permissionsHint = $l->t('Permissions can usually be fixed by giving the webserver write access to the root directory. See %s.',
[$urlGenerator->linkToDocs('admin-dir_permissions')]);
$errors[] = [
'error' => 'Your data directory is not writable',
'hint' => $permissionsHint
];
} else {
fclose($handle);
unlink($testFile);
}
} else {
$errors = array_merge($errors, self::checkDataDirectoryPermissions($CONFIG_DATADIRECTORY));
}