diff options
| author | Kenneth R Westerback <krw@cvs.openbsd.org> | 2009-12-12 06:44:47 +0000 |
|---|---|---|
| committer | Kenneth R Westerback <krw@cvs.openbsd.org> | 2009-12-12 06:44:47 +0000 |
| commit | 6d9e20614adecd5f67d46e3ed51ec1614930dfce (patch) | |
| tree | 0e3be0802714616901a39018c5ed75562cef6d77 | |
| parent | 583cd66bd18d6e3ac9f2e06b7b79b3bf48c9a25b (diff) | |
Add some locking around VOP_CLOSE() and friends. Lets VFSDEBUG
kernels once again mount cd9660 filesystems without crashing.
From an old reverted diff of thib@, parts of which apparently did
not get re-committed.
ok oga@ beck@
| -rw-r--r-- | sys/isofs/cd9660/cd9660_vfsops.c | 19 |
1 files changed, 13 insertions, 6 deletions
diff --git a/sys/isofs/cd9660/cd9660_vfsops.c b/sys/isofs/cd9660/cd9660_vfsops.c index 856cf5f868f..3d6a644f031 100644 --- a/sys/isofs/cd9660/cd9660_vfsops.c +++ b/sys/isofs/cd9660/cd9660_vfsops.c @@ -1,4 +1,4 @@ -/* $OpenBSD: cd9660_vfsops.c,v 1.51 2009/10/31 12:00:08 fgsch Exp $ */ +/* $OpenBSD: cd9660_vfsops.c,v 1.52 2009/12/12 06:44:46 krw Exp $ */ /* $NetBSD: cd9660_vfsops.c,v 1.26 1997/06/13 15:38:58 pk Exp $ */ /*- @@ -251,7 +251,10 @@ iso_mountfs(devvp, mp, p, argp) return (error); if (vcount(devvp) > 1 && devvp != rootvp) return (EBUSY); - if ((error = vinvalbuf(devvp, V_SAVE, p->p_ucred, p, 0, 0)) != 0) + vn_lock(devvp, LK_EXCLUSIVE | LK_RETRY, p); + error = vinvalbuf(devvp, V_SAVE, p->p_ucred, p, 0, 0); + VOP_UNLOCK(devvp, 0, p); + if (error) return (error); error = VOP_OPEN(devvp, ronly ? FREAD : FREAD|FWRITE, FSCRED, p); @@ -443,9 +446,12 @@ out: brelse(bp); if (supbp) brelse(supbp); - if (needclose) - (void)VOP_CLOSE(devvp, ronly ? FREAD : FREAD|FWRITE, NOCRED, - p); + if (needclose) { + vn_lock(devvp, LK_EXCLUSIVE | LK_RETRY, p); + VOP_CLOSE(devvp, ronly ? FREAD : FREAD|FWRITE, NOCRED, p); + VOP_UNLOCK(devvp, 0, p); + } + if (isomp) { free((caddr_t)isomp, M_ISOFSMNT); mp->mnt_data = (qaddr_t)0; @@ -581,8 +587,9 @@ cd9660_unmount(mp, mntflags, p) #endif isomp->im_devvp->v_specmountpoint = NULL; + vn_lock(isomp->im_devvp, LK_EXCLUSIVE | LK_RETRY, p); error = VOP_CLOSE(isomp->im_devvp, FREAD, NOCRED, p); - vrele(isomp->im_devvp); + vput(isomp->im_devvp); free((caddr_t)isomp, M_ISOFSMNT); mp->mnt_data = (qaddr_t)0; mp->mnt_flag &= ~MNT_LOCAL; |