Fencing for zipheader corruption for inline compression feature system and method
A method, computer program product, and computer system for receiving, at a computing device, an I/O request directed to a compressed data portion of a file system. A field associated with the compressed data portion may be determined to be invalid. An error may be generated in response to determining that the field associated with the compressed data portion is invalid. The file system may be maintained in an online status while the compressed data portion is invalid.
1. A computer-implemented method comprising:
receiving, at a computing device, an I/O request directed to a compressed data portion of a file system;
determining that a field associated with the compressed data portion is invalid, wherein the field associated with the compressed data portion includes one of a header version in a ZipHeader and a checksum value for the ZipHeader, wherein the ZipHeader is stored in memory as a global value;
generating an error in response to determining that the field associated with the compressed data portion is invalid;
maintaining the file system in an online status while the compressed data portion is invalid; and
allocating a new block for the compressed data portion when the I/O request is a write request.
2. The computer-implemented method of claim 1 further comprising returning the error for the I/O request, when the I/O request is a read request, based upon, at least in part, determining that the field associated with the compressed data portion is invalid.
3. The computer-implemented method of claim 1 wherein allocating the new block for the compressed data portion, when the I/O request is the write request, is based upon, at least in part, determining that the field associated with the compressed data portion is invalid.
4. The computer-implemented method of claim 3 further comprising filling the new block with zeros.
5. The computer-implemented method of claim 4 further comprising marking the new block as invalid.
6. The computer-implemented method of claim 5 further comprising writing new data for the write request in the new block.
7. A computer program product residing on a non-transitory computer readable storage medium having a plurality of instructions stored thereon which, when executed across one or more processors, causes at least a portion of the one or more processors to perform operations comprising:
receiving an I/O request directed to a compressed data portion of a file system;
determining that a field associated with the compressed data portion is invalid, wherein the field associated with the compressed data portion includes one of a header version in a ZipHeader and a checksum value for the ZipHeader, wherein the ZipHeader is stored in memory as a global value;
generating an error in response to determining that the field associated with the compressed data portion is invalid;
maintaining the file system in an online status while the compressed data portion is invalid; and
allocating a new block for the compressed data portion when the I/O request is a write request.
8. The computer program product of claim 7 wherein the operations further comprise returning the error for the I/O request, when the I/O request is a read request, based upon, at least in part, determining that the field associated with the compressed data portion is invalid.
9. The computer program product of claim 7 wherein allocating the new block for the compressed data portion, when the I/O request is the write request, is based upon, at least in part, determining that the field associated with the compressed data portion is invalid.
10. The computer program product of claim 9 wherein the operations further comprise filling the new block with zeros.
11. The computer program product of claim 10 wherein the operations further comprise marking the new block as invalid.
12. The computer program product of claim 11 wherein the operations further comprise writing new data for the write request in the new block.
13. A computing system including one or more processors and one or more memories configured to perform operations comprising:
receiving an I/O request directed to a compressed data portion of a file system;
determining that a field associated with the compressed data portion is invalid, wherein the field associated with the compressed data portion includes one of a header version in a ZipHeader and a checksum value for the ZipHeader, wherein the ZipHeader is stored in memory as a global value;
generating an error in response to determining that the field associated with the compressed data portion is invalid;
maintaining the file system in an online status while the compressed data portion is invalid; and
allocating a new block for the compressed data portion when the I/O request is a write request.
14. The computing system of claim 13 wherein the operations further comprise returning the error for the I/O request, when the I/O request is a read request, based upon, at least in part, determining that the field associated with the compressed data portion is invalid.
15. The computing system of claim 13 wherein allocating the new block for the compressed data portion, when the I/O request is the write request, is based upon, at least in part, determining that the field associated with the compressed data portion is invalid.
16. The computing system of claim 15 wherein the operations further comprise filling the new block with zeros.
17. The computing system of claim 16 wherein the operations further comprise marking the new block as invalid and writing new data for the write request in the new block.