src-test2/sys/net/raw_cb.c, branch release/6.2.0_cvs

This commit was manufactured by cvs2svn to create tag

2007-01-11T22:54:46Z

'RELENG_6_2_0_RELEASE'. This commit was manufactured to restore the state of the 6.2-RELEASE image.

Acquire the raw_cb mutex around LIST_REMOVE() of a raw socket control

2005-01-24T22:56:09Z

block from the global raw socket list. Submitted by: Roselyn Lee MFC after: 1 week

/* -> /*- for license, minor formatting changes

2005-01-07T01:45:51Z

Push acquisition of the accept mutex out of sofree() into the caller

2004-10-18T22:19:43Z

(sorele()/sotryfree()): - This permits the caller to acquire the accept mutex before the socket mutex, avoiding sofree() having to drop the socket mutex and re-order, which could lead to races permitting more than one thread to enter sofree() after a socket is ready to be free'd. - This also covers clearing of the so_pcb weak socket reference from the protocol to the socket, preventing races in clearing and evaluation of the reference such that sofree() might be called more than once on the same socket. This appears to close a race I was able to easily trigger by repeatedly opening and resetting TCP connections to a host, in which the tcp_close() code called as a result of the RST raced with the close() of the accepted socket in the user process resulting in simultaneous attempts to de-allocate the same socket. The new locking increases the overhead for operations that may potentially free the socket, so we will want to revise the synchronization strategy here as we normalize the reference counting model for sockets. The use of the accept mutex in freeing of sockets that are not listen sockets is primarily motivated by the potential need to remove the socket from the incomplete connection queue on its parent (listen) socket, so cleaning up the reference model here may allow us to substantially weaken the synchronization requirements. RELENG_5_3 candidate. MFC after: 3 days Reviewed by: dwhite Discussed with: gnn, dwhite, green Reported by: Marc UBM Bocklet Reported by: Vlad

Lock down rawcb_list, a global list of control blocks for raw sockets,

2004-06-15T04:13:59Z

using rawcb_mtx. Hold this mutex while modifying or iterating over the control list; this means that the mutex is held over calls into socket delivery code, which no longer causes a lock order reversal as the routing socket code uses a netisr to avoid recursing socket -> routing -> socket. Note: Locking of IPsec consumers of rawcb_list is not included in this commit.

Extend coverage of SOCK_LOCK(so) to include so_count, the socket

2004-06-12T20:47:32Z

reference count: - Assert SOCK_LOCK(so) macros that directly manipulate so_count: soref(), sorele(). - Assert SOCK_LOCK(so) in macros/functions that rely on the state of so_count: sofree(), sotryfree(). - Acquire SOCK_LOCK(so) before calling these functions or macros in various contexts in the stack, both at the socket and protocol layers. - In some cases, perform soisdisconnected() before sotryfree(), as this could result in frobbing of a non-present socket if sotryfree() actually frees the socket. - Note that sofree()/sotryfree() will release the socket lock even if they don't free the socket. Submitted by: sam Sponsored by: FreeBSD Foundation Obtained from: BSD/OS

Constify raw_sendspace and raw_recvspace, as they're not mutable.

2004-06-11T03:52:56Z

Remove advertising clause from University of California Regent's

2004-04-07T20:46:16Z

license, per letter dated July 22, 1999 and email from Peter Wemm, Alan Cox and Robert Watson. Approved by: core, peter, alc, rwatson

Back out M_* changes, per decision of the TRB.

2003-02-19T05:47:46Z

Approved by: trb

Remove M_TRYWAIT/M_WAITOK/M_WAIT. Callers should use 0.

2003-01-21T08:56:16Z

Merge M_NOWAIT/M_DONTWAIT into a single flag M_NOWAIT.