diff options
author | tanimura <tanimura@FreeBSD.org> | 2002-05-20 05:41:09 +0000 |
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committer | tanimura <tanimura@FreeBSD.org> | 2002-05-20 05:41:09 +0000 |
commit | 92d8381dd544a8237b3fd68c4e7fce9bd0903fb2 (patch) | |
tree | 2465ddbcecac65f96c5c6d5cef1a4fe3f1ac03f8 /sys/fs | |
parent | 969293170b27461145f69a538d5abd15fea34ba1 (diff) | |
download | FreeBSD-src-92d8381dd544a8237b3fd68c4e7fce9bd0903fb2.zip FreeBSD-src-92d8381dd544a8237b3fd68c4e7fce9bd0903fb2.tar.gz |
Lock down a socket, milestone 1.
o Add a mutex (sb_mtx) to struct sockbuf. This protects the data in a
socket buffer. The mutex in the receive buffer also protects the data
in struct socket.
o Determine the lock strategy for each members in struct socket.
o Lock down the following members:
- so_count
- so_options
- so_linger
- so_state
o Remove *_locked() socket APIs. Make the following socket APIs
touching the members above now require a locked socket:
- sodisconnect()
- soisconnected()
- soisconnecting()
- soisdisconnected()
- soisdisconnecting()
- sofree()
- soref()
- sorele()
- sorwakeup()
- sotryfree()
- sowakeup()
- sowwakeup()
Reviewed by: alfred
Diffstat (limited to 'sys/fs')
-rw-r--r-- | sys/fs/fifofs/fifo_vnops.c | 32 | ||||
-rw-r--r-- | sys/fs/portalfs/portal_vnops.c | 33 |
2 files changed, 49 insertions, 16 deletions
diff --git a/sys/fs/fifofs/fifo_vnops.c b/sys/fs/fifofs/fifo_vnops.c index 36e8f7c..71ba03c 100644 --- a/sys/fs/fifofs/fifo_vnops.c +++ b/sys/fs/fifofs/fifo_vnops.c @@ -203,26 +203,32 @@ fifo_open(ap) } fip->fi_readers = fip->fi_writers = 0; wso->so_snd.sb_lowat = PIPE_BUF; + SOCK_LOCK(rso); rso->so_state |= SS_CANTRCVMORE; + SOCK_UNLOCK(rso); } if (ap->a_mode & FREAD) { fip->fi_readers++; if (fip->fi_readers == 1) { + SOCK_LOCK(fip->fi_writesock); fip->fi_writesock->so_state &= ~SS_CANTSENDMORE; if (fip->fi_writers > 0) { wakeup((caddr_t)&fip->fi_writers); sowwakeup(fip->fi_writesock); } + SOCK_UNLOCK(fip->fi_writesock); } } if (ap->a_mode & FWRITE) { fip->fi_writers++; if (fip->fi_writers == 1) { + SOCK_LOCK(fip->fi_readsock); fip->fi_readsock->so_state &= ~SS_CANTRCVMORE; if (fip->fi_readers > 0) { wakeup((caddr_t)&fip->fi_readers); sorwakeup(fip->fi_writesock); } + SOCK_UNLOCK(fip->fi_readsock); } } if ((ap->a_mode & FREAD) && (ap->a_mode & O_NONBLOCK) == 0) { @@ -282,15 +288,21 @@ fifo_read(ap) #endif if (uio->uio_resid == 0) return (0); - if (ap->a_ioflag & IO_NDELAY) + if (ap->a_ioflag & IO_NDELAY) { + SOCK_LOCK(rso); rso->so_state |= SS_NBIO; + SOCK_UNLOCK(rso); + } startresid = uio->uio_resid; VOP_UNLOCK(ap->a_vp, 0, td); error = soreceive(rso, (struct sockaddr **)0, uio, (struct mbuf **)0, (struct mbuf **)0, (int *)0); vn_lock(ap->a_vp, LK_EXCLUSIVE | LK_RETRY, td); - if (ap->a_ioflag & IO_NDELAY) + if (ap->a_ioflag & IO_NDELAY) { + SOCK_LOCK(rso); rso->so_state &= ~SS_NBIO; + SOCK_UNLOCK(rso); + } return (error); } @@ -315,14 +327,20 @@ fifo_write(ap) if (ap->a_uio->uio_rw != UIO_WRITE) panic("fifo_write mode"); #endif - if (ap->a_ioflag & IO_NDELAY) + if (ap->a_ioflag & IO_NDELAY) { + SOCK_LOCK(wso); wso->so_state |= SS_NBIO; + SOCK_UNLOCK(wso); + } VOP_UNLOCK(ap->a_vp, 0, td); error = sosend(wso, (struct sockaddr *)0, ap->a_uio, 0, (struct mbuf *)0, 0, td); vn_lock(ap->a_vp, LK_EXCLUSIVE | LK_RETRY, td); - if (ap->a_ioflag & IO_NDELAY) + if (ap->a_ioflag & IO_NDELAY) { + SOCK_LOCK(wso); wso->so_state &= ~SS_NBIO; + SOCK_UNLOCK(wso); + } return (error); } @@ -412,10 +430,13 @@ filt_fiforead(struct knote *kn, long hint) struct socket *so = (struct socket *)kn->kn_hook; kn->kn_data = so->so_rcv.sb_cc; + SOCK_LOCK(so); if (so->so_state & SS_CANTRCVMORE) { + SOCK_UNLOCK(so); kn->kn_flags |= EV_EOF; return (1); } + SOCK_UNLOCK(so); kn->kn_flags &= ~EV_EOF; return (kn->kn_data > 0); } @@ -436,10 +457,13 @@ filt_fifowrite(struct knote *kn, long hint) struct socket *so = (struct socket *)kn->kn_hook; kn->kn_data = sbspace(&so->so_snd); + SOCK_LOCK(so); if (so->so_state & SS_CANTSENDMORE) { + SOCK_UNLOCK(so); kn->kn_flags |= EV_EOF; return (1); } + SOCK_UNLOCK(so); kn->kn_flags &= ~EV_EOF; return (kn->kn_data >= so->so_snd.sb_lowat); } diff --git a/sys/fs/portalfs/portal_vnops.c b/sys/fs/portalfs/portal_vnops.c index b345c57..23b471f 100644 --- a/sys/fs/portalfs/portal_vnops.c +++ b/sys/fs/portalfs/portal_vnops.c @@ -43,24 +43,26 @@ */ #include <sys/param.h> -#include <sys/systm.h> -#include <sys/sysproto.h> -#include <sys/kernel.h> -#include <sys/time.h> -#include <sys/proc.h> -#include <sys/filedesc.h> -#include <sys/vnode.h> #include <sys/fcntl.h> #include <sys/file.h> -#include <sys/stat.h> -#include <sys/mount.h> +#include <sys/filedesc.h> +#include <sys/kernel.h> +#include <sys/lock.h> #include <sys/malloc.h> -#include <sys/namei.h> #include <sys/mbuf.h> +#include <sys/mount.h> +#include <sys/mutex.h> +#include <sys/namei.h> +#include <sys/proc.h> #include <sys/socket.h> #include <sys/socketvar.h> +#include <sys/stat.h> +#include <sys/systm.h> +#include <sys/sysproto.h> +#include <sys/time.h> #include <sys/un.h> #include <sys/unpcb.h> +#include <sys/vnode.h> #include <fs/portalfs/portal.h> static int portal_fileid = PORTAL_ROOTFILEID+1; @@ -182,8 +184,12 @@ portal_connect(so, so2) if (so->so_type != so2->so_type) return (EPROTOTYPE); - if ((so2->so_options & SO_ACCEPTCONN) == 0) + SOCK_LOCK(so2); + if ((so2->so_options & SO_ACCEPTCONN) == 0) { + SOCK_UNLOCK(so2); return (ECONNREFUSED); + } + SOCK_UNLOCK(so2); if ((so3 = sonewconn(so2, 0)) == 0) return (ECONNREFUSED); @@ -280,14 +286,17 @@ portal_open(ap) * and keep polling the reference count. XXX. */ s = splnet(); + SOCK_LOCK(so); while ((so->so_state & SS_ISCONNECTING) && so->so_error == 0) { if (fmp->pm_server->f_count == 1) { + SOCK_UNLOCK(so); error = ECONNREFUSED; splx(s); goto bad; } - (void) tsleep((caddr_t) &so->so_timeo, PSOCK, "portalcon", 5 * hz); + (void) msleep((caddr_t) &so->so_timeo, SOCK_MTX(so), PSOCK, "portalcon", 5 * hz); } + SOCK_UNLOCK(so); splx(s); if (so->so_error) { |