Rapid side-channel access to storage devices
Disclosed are systems, methods, and apparatuses for providing a high-speed data path to storage devices. In one embodiment, a method is disclosed comprising receiving, by the processor, a data access command, the data access command specifying a location in memory to access data; issuing, by the processor, the data access command to the storage device via a first datapath, the first datapath comprising a non-block datapath; and accessing, by the processor, the non-volatile storage component through the first datapath and the memory, wherein the non-volatile storage component of the storage device is mapped to memory accessible by the processor.
1. A method comprising:
receiving, by a processor, a data access command, the data access command specifying a host address of a memory to access data;
determining, by the processor, that the data access command is a critical access command based on the content of the data access command;
issuing, by the processor, the data access command to a controller of a storage device via a non-block datapath; and
accessing, by the processor, a non-volatile storage component of the storage device through the non-block datapath, wherein the non-volatile storage component is mapped to the memory accessible by the processor.
2. The method of claim 1 , the determining that the data access command is a critical access command comprising determining that the data access command is a critical access command based on the content of the data access command.
3. The method of claim 2 , the determining that the data access command is a critical access command based on the content of the data access command comprising analyzing a payload of a write command and determining that a size of the payload is lower than a pre-determined threshold.
4. The method of claim 1 , the determining that the data access command is a critical access command comprising determining that the data access command was issued via a separate system call for critical data access.
5. The method of claim 4 , the determining that the data access command was issued via a separate system call for critical data access comprising analyzing a name of the separate system call.
6. The method of claim 1 , the determining that the data access command is a critical access command comprising determining that a POSIX system call associated with the data access command includes a critical flag.
7. The method of claim 1 , the determining that the data access command is a critical access command comprising determining that a filepath associated with the data access command is memory-mapped to a critical location of the storage device.
8. The method of claim 7 , the determining that a filepath associated with the data access command is memory-mapped to a critical location of the storage device comprising determining that the filepath is mapped to a controller memory buffer (CMB) window of the storage device.
9. A device comprising:
a processor; and
a storage medium for tangibly storing thereon program logic for execution by the processor, the stored program logic comprising logic causing the processor to perform the operations of:
receiving a data access command, the data access command specifying a host address of a memory to access data,
determining that the data access command is a critical access command based on the content of the data access command,
issuing the data access command to a controller of a storage device via a non-block datapath, and
accessing a non-volatile storage component of the storage device through the non-block datapath, wherein the non-volatile storage component is mapped to the memory accessible by the processor.
10. The device of claim 9 , the determining that the data access command is a critical access command comprising determining that the data access command is a critical access command based on the content of the data access command.
11. The device of claim 10 , the determining that the data access command is a critical access command based on the content of the data access command comprising analyzing a payload of a write command and determining that a size of the payload is lower than a pre-determined threshold.
12. The device of claim 9 , the determining that the data access command is a critical access command comprising determining that the data access command was issued via a separate system call for critical data access.
13. The device of claim 12 , the determining that the data access command was issued via a separate system call for critical data access comprising analyzing a name of the separate system call.
14. The device of claim 9 , the determining that the data access command is a critical access command comprising determining that a POSIX system call associated with the data access command includes a critical flag.
15. The device of claim 9 , the determining that the data access command is a critical access command comprising determining that a filepath associated with the data access command is memory-mapped to a critical location of the storage device.
16. The device of claim 15 , the determining that a filepath associated with the data access command is memory-mapped to a critical location of the storage device comprising determining that the filepath is mapped to a controller memory buffer (CMB) window of the storage device.
17. A non-transitory computer-readable storage medium for tangibly storing computer program instructions capable of being executed by a computer processor, the computer program instructions defining the steps of:
receiving, by a processor, a data access command, the data access command specifying a host address of a memory to access data;
determining, by the processor, that the data access command is a critical access command based on the content of the data access command;
issuing, by the processor, the data access command to a controller of a storage device via a non-block datapath; and
accessing, by the processor, a non-volatile storage component of the storage device through the non-block datapath, wherein the non-volatile storage component is mapped to the memory accessible by the processor.
18. The non-transitory computer-readable storage medium of claim 17 , the determining that the data access command is a critical access command comprising determining that the data access command is a critical access command based on the content of the data access command.
19. The non-transitory computer-readable storage medium of claim 17 , the determining that the data access command is a critical access command comprising determining that the data access command was issued via a separate system call for critical data access.
20. The non-transitory computer-readable storage medium of claim 17 , the determining that the data access command is a critical access command comprising determining that a filepath associated with the data access command is memory-mapped to a critical location of the storage device.