Correlation of network connections and processes in a virtualized computing environment

1. A method, comprising:

in a computer, running a hypervisor that allocates resources of a memory and of a network to one or more Virtual Machines (VMs), which run VM processes and communicate over network connections;

identifying, by monitoring the network connections in the hypervisor, a VM that is associated with a given network connection;

identifying that the given network connection is associated with a given VM process, by:

reconstructing a physical address of a data structure in a region of the memory assigned to the identified VM, wherein the data structure is managed by a guest operating system of the identified VM and indicates the given process, and wherein reconstructing the physical address is performed by accessing the guest operating system via a cache that caches previously-reconstructed physical addresses; and

directly accessing the data structure, in the hypervisor, at the physical address; and

establishing an association between the given network connection and the given VM process.

2. The method according to claim 1 , wherein reconstructing the physical address comprises cloning the guest operating system, and creating in the cloned guest operating system a process that queries the cloned guest operating system for the physical address and exports the queried physical address.

3. The method according to claim 1 , wherein reconstructing the physical address comprises accessing, on a virtual disk allocated to the guest operating system, a file that indicates the physical address.

4. The method according to claim 1 , wherein accessing the data structure comprises finding a match to one or more parameters of the given connection in a list of currently-active processes of the guest operating system.

5. The method according to claim 1 , wherein accessing the data structure comprises finding a match to one or more parameters of the given connection in a Transmission Control Protocol/Internet Protocol (TCP/IP) lookup table of the guest operating system.

6. The method according to claim 1 , wherein identifying that the given network connection is associated with a given VM process comprises periodically polling the region of the memory.

7. An apparatus, comprising:

a memory; and

a processor, configured to:

run a hypervisor that allocates resources of the memory and of a network to one or more Virtual Machines (VMs), which run VM processes and communicate over network connections;

identify, by monitoring the network connections in the hypervisor, a VM that is associated with a given network connection;

identify that the given network connection is associated with a given VM process, by:

reconstructing a physical address of a data structure in a region of the memory assigned to the identified VM, wherein the data structure is managed by a guest operating system of the identified VM and indicates the given process, and wherein reconstructing the physical address is performed by accessing the guest operating system via a cache that caches previously-reconstructed physical addresses; and

directly accessing the data structure, in the hypervisor, at the physical address; and

establish an association between the given network connection and the given VM process.

8. The apparatus according to claim 7 , wherein the processor is configured to reconstruct the physical address by cloning the guest operating system, and creating in the cloned guest operating system a process that queries the cloned guest operating system for the physical address and exports the queried physical address.

9. The apparatus according to claim 7 , wherein the processor is configured to reconstruct the physical address by accessing, on a virtual disk allocated to the guest operating system, a file that indicates the physical address.

10. The apparatus according to claim 7 , wherein the data structure comprises a list of currently-active processes of the guest operating system, and wherein the processor is configured to find a match to one or more parameters of the given connection in the list of currently-active processes.

11. The apparatus according to claim 7 , wherein the data structure comprises a Transmission Control Protocol/Internet Protocol (TCP/IP) lookup table of the guest operating system, and wherein the processor is configured to find a match to one or more parameters of the given connection in the TCP/IP lookup table.

12. The apparatus according to claim 7 , wherein the processor is configured to identify that the given network connection is associated with a given VM process by periodically polling the regions of the memory.

13. A computer software product, the product comprising a tangible non-transitory computer-readable medium in which program instructions are stored, which instructions, when read by a processor, cause the processor to:

run a hypervisor that allocates resources of the memory and of a network to one or more Virtual Machines (VMs), which run VM processes and communicate over network connections;

identify, by monitoring the network connections in the hypervisor, a VM that is associated with a given network connection;

identify that the given network connection is associated with a given VM process, by:

reconstructing a physical address of a data structure in a region of the memory assigned to the identified VM, wherein the data structure is managed by a guest operating system of the identified VM and indicates the given process, and wherein reconstructing the physical address is performed by accessing the guest operating system via a cache that caches previously-reconstructed physical addresses; and

directly accessing the data structure, in the hypervisor, at the physical address; and

establish an association between the given network connection and the given VM process.