Date: Sun, 9 Jun 2013 23:51:27 +0000 (UTC) From: Marcel Moolenaar <marcel@FreeBSD.org> To: src-committers@freebsd.org, svn-src-all@freebsd.org, svn-src-head@freebsd.org Subject: svn commit: r251590 - in head/sys: kern sys Message-ID: <201306092351.r59NpRTZ024888@svn.freebsd.org>
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Author: marcel Date: Sun Jun 9 23:51:26 2013 New Revision: 251590 URL: http://svnweb.freebsd.org/changeset/base/251590 Log: Add vfs_mounted and vfs_unmounted events so that components can be informed about mount and unmount events. This is used by Juniper to implement a more optimal implementation of NetBSD's veriexec. Submitted by: stevek@juniper.net Obtained from: Juniper Networks, Inc Modified: head/sys/kern/vfs_mount.c head/sys/sys/mount.h Modified: head/sys/kern/vfs_mount.c ============================================================================== --- head/sys/kern/vfs_mount.c Sun Jun 9 23:50:30 2013 (r251589) +++ head/sys/kern/vfs_mount.c Sun Jun 9 23:51:26 2013 (r251590) @@ -864,6 +864,7 @@ vfs_domount_first( VOP_UNLOCK(newdp, 0); VOP_UNLOCK(vp, 0); mountcheckdirs(vp, newdp); + EVENTHANDLER_INVOKE(vfs_mounted, mp, newdp, td); vrele(newdp); if ((mp->mnt_flag & MNT_RDONLY) == 0) vfs_allocate_syncvnode(mp); @@ -1355,6 +1356,7 @@ dounmount(mp, flags, td) mtx_lock(&mountlist_mtx); TAILQ_REMOVE(&mountlist, mp, mnt_list); mtx_unlock(&mountlist_mtx); + EVENTHANDLER_INVOKE(vfs_unmounted, mp, td); if (coveredvp != NULL) { coveredvp->v_mountedhere = NULL; vput(coveredvp); Modified: head/sys/sys/mount.h ============================================================================== --- head/sys/sys/mount.h Sun Jun 9 23:50:30 2013 (r251589) +++ head/sys/sys/mount.h Sun Jun 9 23:51:26 2013 (r251590) @@ -39,6 +39,7 @@ #include <sys/lock.h> #include <sys/lockmgr.h> #include <sys/_mutex.h> +#include <sys/eventhandler.h> #endif /* @@ -798,6 +799,17 @@ vfs_statfs_t __vfs_statfs; extern char *mountrootfsname; /* + * Event handlers + */ + +typedef void (*vfs_mounted_notify_fn)(void *, struct mount *, struct vnode *, + struct thread *); +typedef void (*vfs_unmounted_notify_fn)(void *, struct mount *, + struct thread *); +EVENTHANDLER_DECLARE(vfs_mounted, vfs_mounted_notify_fn); +EVENTHANDLER_DECLARE(vfs_unmounted, vfs_unmounted_notify_fn); + +/* * exported vnode operations */
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