Author: shurd Date: Tue Apr 10 19:42:50 2018 New Revision: 332388 URL: https://svnweb.freebsd.org/changeset/base/332388
Log: Make BPF global lock an SX This allows NIC drivers to sleep on polling config operations. Submitted by: Matthew Macy <mm...@mattmacy.io> Reviewed by: shurd Sponsored by: Limelight Networks Differential Revision: https://reviews.freebsd.org/D14982 Modified: head/sys/kern/subr_witness.c head/sys/net/bpf.c head/sys/net/bpfdesc.h Modified: head/sys/kern/subr_witness.c ============================================================================== --- head/sys/kern/subr_witness.c Tue Apr 10 19:18:16 2018 (r332387) +++ head/sys/kern/subr_witness.c Tue Apr 10 19:42:50 2018 (r332388) @@ -569,7 +569,7 @@ static struct witness_order_list_entry order_lists[] = /* * BPF */ - { "bpf global lock", &lock_class_mtx_sleep }, + { "bpf global lock", &lock_class_sx }, { "bpf interface lock", &lock_class_rw }, { "bpf cdev lock", &lock_class_mtx_sleep }, { NULL, NULL }, Modified: head/sys/net/bpf.c ============================================================================== --- head/sys/net/bpf.c Tue Apr 10 19:18:16 2018 (r332387) +++ head/sys/net/bpf.c Tue Apr 10 19:42:50 2018 (r332388) @@ -159,6 +159,9 @@ struct bpf_dltlist32 { #define BIOCSETFNR32 _IOW('B', 130, struct bpf_program32) #endif +#define BPF_LOCK() sx_xlock(&bpf_sx) +#define BPF_UNLOCK() sx_xunlock(&bpf_sx) +#define BPF_LOCK_ASSERT() sx_assert(&bpf_sx, SA_XLOCKED) /* * bpf_iflist is a list of BPF interface structures, each corresponding to a * specific DLT. The same network interface might have several BPF interface @@ -166,7 +169,7 @@ struct bpf_dltlist32 { * frames, ethernet frames, etc). */ static LIST_HEAD(, bpf_if) bpf_iflist, bpf_freelist; -static struct mtx bpf_mtx; /* bpf global lock */ +static struct sx bpf_sx; /* bpf global lock */ static int bpf_bpfd_cnt; static void bpf_attachd(struct bpf_d *, struct bpf_if *); @@ -2821,7 +2824,7 @@ bpf_drvinit(void *unused) { struct cdev *dev; - mtx_init(&bpf_mtx, "bpf global lock", NULL, MTX_DEF); + sx_init(&bpf_sx, "bpf global lock"); LIST_INIT(&bpf_iflist); LIST_INIT(&bpf_freelist); Modified: head/sys/net/bpfdesc.h ============================================================================== --- head/sys/net/bpfdesc.h Tue Apr 10 19:18:16 2018 (r332387) +++ head/sys/net/bpfdesc.h Tue Apr 10 19:42:50 2018 (r332388) @@ -118,9 +118,6 @@ struct bpf_d { #define BPF_PID_REFRESH(bd, td) (bd)->bd_pid = (td)->td_proc->p_pid #define BPF_PID_REFRESH_CUR(bd) (bd)->bd_pid = curthread->td_proc->p_pid -#define BPF_LOCK() mtx_lock(&bpf_mtx) -#define BPF_UNLOCK() mtx_unlock(&bpf_mtx) -#define BPF_LOCK_ASSERT() mtx_assert(&bpf_mtx, MA_OWNED) /* * External representation of the bpf descriptor */ _______________________________________________ svn-src-head@freebsd.org mailing list https://lists.freebsd.org/mailman/listinfo/svn-src-head To unsubscribe, send any mail to "svn-src-head-unsubscr...@freebsd.org"
