Processing data packets at a storage service module of a switch

A system for routing a data packet of an information unit sequence, comprising:

• an interface of a switch operable to receive a data packet of an information unit sequence of a block storage exchange from a storage client, the sequence associated with a source identifier and a target identifier identifying a target;
• and
• a processor coupled to the interface and operable to:
• determine a storage resource identifier corresponding to the target identifier according to a forwarding table;
• associate a sequence identifier with the source identifier the sequence identifier corresponding to the target;
• record the source identifier and the sequence identifier at a context table;
• route the data packet according to the storage resource identifier;
• receive a next data packet associated with the sequence identifier;
• and
• route the next data packet according to the context table.

Logic for routing a data packet of an information unit sequence, the logic embodied in a computer readable storage medium and operable to:

• receive at a switch a data packet of an information unit sequence of a block storage exchange from a storage client, the sequence associated with a source identifier and a target identifier identifying a target;
• determine a storage resource identifier corresponding to the target identifier according to a forwarding table;
• associate a sequence identifier with the source identifier, the sequence identifier corresponding to the target;
• record the source identifier and the sequence identifier at a context table;
• route the data packet according to the storage resource identifier;
• receive a next data packet associated with the sequence identifier;
• and
• route the next data packet according to the context table.

A system for routing a data packet of an information unit sequence, comprising:

• means for receiving at a switch a data packet of an information unit sequence of a block storage exchange from a storage client, the sequence associated with a source identifier and a target identifier identifying a target;
• means for determining a storage resource identifier corresponding to the target identifier according to a forwarding table;
• means for associating a sequence identifier with the source identifier, the sequence identifier corresponding to the target;
• means for recording the source identifier and the sequence identifier at a context table;
• means for routing the data packet according to the storage resource identifier,
• means for receiving a next data packet associated with the sequence identifier;
• and
• routing the next data packet according to the context table.

A method for routing a data packet of an information unit sequence, comprising:

• receiving at a switch a data packet of an information unit sequence of a block storage exchange from a storage client, the sequence associated with a source identifier and a target identifier identifying a target;
• determining a storage resource identifier corresponding to the target identifier according to a forwarding table;
• associating a sequence identifier with the source identifier, the sequence identifier corresponding to the target;
• recording the source identifier and the sequence identifier at a context table;
• routing the data packet according to the storage resource identifier;
• receiving a next data packet associated with the sequence identifier, and routing the next data packet according to the context table;
• repeating the following until a final response is received from the storage resource if the sequence comprises a read command:
• receiving data from the storage resource, and routing the data to the storage client using a hardware accelerator;
• repeating the following until a final response is received from the storage client if the sequence comprises a first write command:
• receiving data from the storage client, and routing the data to the storage resource using a hardware accelerator;
• repeating the following until a final response is received from the storage client if the sequence comprises a second write command corresponding to a plurality of storage resources, the plurality of storage resources comprising the storage resource:
• receiving data from the storage client, and routing the data to the plurality of storage resources using a hardware accelerator;
• and
• repeating the following until a final response is received from the storage resource if the sequence comprises a third party copy command to copy data from the storage resource to a destination resource:
• receiving data from the storage resource, and routing the data to the destination resource.

A method for routing a data packet, comprising:

• receiving at a switch a first data packet from a storage client, the first data packet having a first source address and a first destination address, the first destination address corresponding to a target identifier;
• determining a storage resource address corresponding to the target identifier;
• rewriting the first destination address of the first data packet at a hardware accelerator, the rewritten first destination address comprising the storage resource address;
• routing the first data packet according to the rewritten first destination address;
• assigning an identifier to the first data packet;
• recording the first source address of the first data packet at the switch;
• receiving at the switch a second data packet from a storage resource corresponding to the storage resource address, the second data packet having a second source address and a second destination address, the second data packet associated with the identifier assigned to the first data packet;
• retrieving the recorded first source address in accordance with the identifier assigned to the first data packet;
• rewriting the second destination address of the first data packet at the hardware accelerator, the rewritten second destination address comprising the first source address;
• and
• routing the first data packet according to the rewritten second destination address.

A system for routing a data packet, comprising:

• an input operable to receive at a switch a first data packet from a storage client, the first data packet having a first source address and a first destination address, the first destination address corresponding to a target identifier;
• and
• a processor coupled to the input and operable to:
• determine a storage resource address corresponding to the target identifier;
• rewrite the first destination address of the first data packet at a hardware accelerator, the rewritten first destination address comprising the storage resource address;
• route the first data packet according to the rewritten first destination address;
• assign an identifier to the first data packet;
• record the first source address of the first data packet at the switch;
• receive at the switch a second data packet from a storage resource corresponding to the storage resource address, the second data packet having a second source address and a second destination address, the second data packet associated with the identifier assigned to the first data packet;
• retrieve the recorded first source address in accordance with the identifier assigned to the first data packet;
• rewrite the second destination address of the first data packet at the hardware accelerator, the rewritten second destination address comprising the first source address;
• and
• route the first data packet according to the rewritten second destination address.

Logic for routing a data packet, the logic embodied in a computer readable storage medium and operable to:

• receive at a switch a first data packet from a storage client, the first data packet having a first source address and a first destination address, the first destination address corresponding to a target identifier;
• determine a storage resource address corresponding to the target identifier;
• rewrite the first destination address of the first data packet at a hardware accelerator, the rewritten first destination address comprising the storage resource address;
• route the first data packet according to the rewritten first destination address;
• assign an identifier to the first data packet;
• record the first source address of the first data packet at the switch;
• receive at the switch a second data packet from a storage resource corresponding to the storage resource address, the second data packet having a second source address and a second destination address, the second data packet associated with the identifier assigned to the first data packet;
• retrieve the recorded first source address in accordance with the identifier assigned to the first data packet;
• rewrite the second destination address of the first data packet at the hardware accelerator, the rewritten second destination address comprising the first source address;
• and
• route the first data packet according to the rewritten second destination address.