Generalized verification scheme for safe metadata modification

A data storage system comprising:

• one or more processors;
• a storage device coupled to said one or more processors;
• and
• memory coupled to said one or more processors and storing instructions that, when executed by said one or more processors, implement:
• a file system creation utility configured to reserve a first plurality of metadata areas in a file system volume of said storage device, the first plurality of metadata areas configured to store a plurality of metadata records, wherein said plurality of metadata records comprises a first metadata record;
• a namespace utility configured to create, in a namespace storage area of said storage device different than and outside of said file system volume, a namespace for said reserving responsive to a first indication, wherein said file system creation utility is further configured to generate values associated with a set of descriptors in said namespace for characterizing a respective metadata area of said first plurality of metadata areas, wherein said first indication indicates to verify a write operation request associated with a prescribed category with verification logic;
• a file system driver configured to generate write operation requests related to said metadata areas;
• and
• the verification logic configured to:
• receive a first write operation request for performing a first write operation on said first metadata record in said file system volume;
• and
• responsive to said first indication and said first write operation request, before performing said write operation in said file system volume, verifying said first write operation request based on comparing extracted information of said first write operation request to said stored values in said namespace storage area to determine whether to perform said first write operation in said file system volume.

A system comprising:

• one or more processors;
• a storage device coupled to said one or more processors;
• and
• memory coupled to said one or more processors and storing instructions that, when executed by said one or more processors, cause said one or more processors to perform a method comprising:
• receiving a first indication to verify a write operation request associated with a prescribed category;
• reserving a first plurality of metadata areas in a file system volume, the first plurality of metadata areas configured to store a plurality of metadata records, wherein said plurality of metadata records comprises a first metadata record;
• creating, in a namespace storage area of the storage device different than and outside of the file system volume, a namespace for said reserving responsive to said first indication, wherein said namespace comprises stored values associated with a set of descriptors for characterizing a respective metadata area of said first plurality of metadata areas, and wherein said set of descriptors comprises metadata structure;
• receiving a first write operation request for a performing a first write operation on said first metadata record in the file system volume;
• and
• verifying, using verification logic before performing said first write operation in said file system volume, based on said first indication and in response to said first write operation request, said first write operation request based on comparing extracted information of said first write operation request to said stored values in said namespace storage area to determine whether to perform said first write operation in said file system volume.