Directory selective backups

• US 10,521,307 B1
• Filed: 06/28/2016
• Issued: 12/31/2019
• Est. Priority Date: 06/28/2016
• Status: Active Grant

• Current Assignee: Emc IP Holding Company LLC (Dell Technologies Inc.)
• Original Assignee: Emc IP Holding Company LLC (Dell Technologies Inc.)
• Inventors: Patwardhan, Kedar, Chan, Wallun, Terrien, Dale
• Primary Examiner(s): Skhoun, Hicham
• Application Number:
  US15/194,890
• Time in Patent Office: 1,281 Days
• Field of Search: 707624
• CPC Class Codes: G06F 11/1451 by selection of backup contents
• CPC Class Codes: G06F 11/1458 Management of the backup or restore process
• CPC Class Codes: G06F 16/1815 Journaling file systems

Abstract

Backup operations on selected directories are performed in a computing system. File system operations that impact the ability to backup the selected directories are failed while other file system operations are allowed. In particular, file system operations that would require a trawl of the selected directory in order to perform the backup operation are failed.

Claims

1. A method for performing a backup operation in a computing system, the method comprising:

configuring the backup operation by identifying a zone to backup, the zone including at least a directory;

intercepting a file system operation;

evaluating the file system operation to determine whether the file system operation interferes with an ability of the backup operation to perform the backup operation to backup the zone;

determining that the file system operation interferes with the ability of the backup operation to backup the zone; and

failing the file system operation.

2. The method of claim 1, further comprising determining that the file system operation does not prevent the zone from being backed up and allowing the file system operation when the file system.

3. The method of claim 1, further comprising failing the file system operation when the file system operation renames a directory included in the zone from the zone to a second zone.

4. The method of claim 1, further comprising failing the file system when the file system operation renames a directory not contained in any zone to a path contained within the zone.

5. The method of claim 1, further comprising failing the file system when a hardlink create operation includes a source file name and a target file name that are not contained within the same zone.

6. The method of claim 5, further comprising failing the file system when only one of the source file name and the target file name are within the zone.

7. The method of claim 1, further comprising failing the file system operation when the file system operation modifies a path of a directory in the zone.

8. The method of claim 1, further comprising allowing directory rename operations within the zone.

9. The method of claim 1, further comprising journaling a change associated with the file system operation when the file system operation is not failed.

10. A method for performing a backup operation in a computing system that includes a file system, wherein the backup operation is configured to backup a zone that includes a directory and a subtree of the directory, the method comprising:

receiving a file system operation from an application that is to be performed on the zone;

determining whether the file system operation violates a rule associated with the zone that would prevent the backup operation from performing the backup operation and backing up the zone;

failing the file system operation when the file system operation violates the rule and allowing the file system operation when the file system operation does not violate the rule.

11. The method of claim 10, wherein the rule includes failing the file system operation when the file system operation renames the directory from a first zone to the zone.

12. The method of claim 10, wherein the rule includes failing the file system when the file system operation renames a directory not contained in any zone to a path contained within the zone.

13. The method of claim 10, wherein the rule includes failing the file system when a hardlink create operation includes a source file name and a target file name that are not contained within the zone.

14. The method of claim 10, wherein the rule includes failing the file system when only one of the source file name and the target file name are within the zone.

15. The method of claim 10, wherein the rule includes failing the file system operation when the file system operation modifies a path of the directory in the zone.

16. The method of claim 10, wherein the rule includes allowing directory rename operations with the zone.

17. The method of claim 10, further comprising journaling a change associated with the file system operation when the file system operation is allowed.

18. An apparatus for managing file system operations on a zone selected for backup in a file system by a backup application, the apparatus comprising:

hardware including a storage and a processor;

a kernel;

a tracker module including computer executable instructions implemented in the kernel,

wherein the tracker module is configured to;

intercept file system operations;

evaluate the file system operations to determine whether the file system operations interfere with an ability of the backup application to perform a backup operation to backup the selected zone;

determine that the file system operations interfere with the ability of the backup operation to backup the selected zone;

fail the file system operations when the file system operations prevent the selected zone from being incrementally backed up without a trawl of the selected zone and allow the file system operations when the file system operations do not prevent the selected zone from being incrementally backed up without the trawl of the selected zone.

19. The apparatus of claim 18, wherein the tracker module is associated with a directory list and a journal, wherein changes to the file system are logged in the journal and wherein the directory list stores all zones selected for backup operations.

20. The apparatus of claim 18, wherein the tracker module fails the file system operations when at least one of:

the file system operation renames a directory from a first zone to the selected zone;

the file system operation renames a directory not contained in any zone to a path contained within the selected zone;

a hardlink create operation includes a source file name and a target file name that are not contained within the selected zone or only one of the source file name and the target file name are within the selected zone; and

the file system operation modifies a path of a directory in the selected zone.