diff options
Diffstat (limited to 'sys/kern/vfs_init.c')
| -rw-r--r-- | sys/kern/vfs_init.c | 37 |
1 files changed, 29 insertions, 8 deletions
diff --git a/sys/kern/vfs_init.c b/sys/kern/vfs_init.c index cd30d5cfae47..ceda770cb714 100644 --- a/sys/kern/vfs_init.c +++ b/sys/kern/vfs_init.c @@ -103,6 +103,16 @@ struct vattr va_null; * Routines having to do with the management of the vnode table. */ +void +vfs_unref_vfsconf(struct vfsconf *vfsp) +{ + vfsconf_lock(); + KASSERT(vfsp->vfc_refcount > 0, + ("vfs %p refcount underflow %d", vfsp, vfsp->vfc_refcount)); + vfsp->vfc_refcount--; + vfsconf_unlock(); +} + static struct vfsconf * vfs_byname_locked(const char *name) { @@ -123,9 +133,11 @@ vfs_byname(const char *name) { struct vfsconf *vfsp; - vfsconf_slock(); + vfsconf_lock(); vfsp = vfs_byname_locked(name); - vfsconf_sunlock(); + if (vfsp != NULL) + vfsp->vfc_refcount++; + vfsconf_unlock(); return (vfsp); } @@ -387,7 +399,7 @@ vfs_register(struct vfsconf *vfc) static int once; struct vfsconf *tvfc; uint32_t hashval; - int secondpass; + int error, prevmaxconf, secondpass; if (!once) { vattr_null(&va_null); @@ -405,6 +417,7 @@ vfs_register(struct vfsconf *vfc) return (EEXIST); } + prevmaxconf = maxvfsconf; if (vfs_typenumhash != 0) { /* * Calculate a hash on vfc_name to use for vfc_typenum. Unless @@ -497,16 +510,24 @@ vfs_register(struct vfsconf *vfc) vfc->vfc_vfsops = &vfsops_sigdefer; } - if (vfc->vfc_flags & VFCF_JAIL) - prison_add_vfs(vfc); - /* * Call init function for this VFS... */ if ((vfc->vfc_flags & VFCF_SBDRY) != 0) - vfc->vfc_vfsops_sd->vfs_init(vfc); + error = vfc->vfc_vfsops_sd->vfs_init(vfc); else - vfc->vfc_vfsops->vfs_init(vfc); + error = vfc->vfc_vfsops->vfs_init(vfc); + + if (error != 0) { + maxvfsconf = prevmaxconf; + TAILQ_REMOVE(&vfsconf, vfc, vfc_list); + vfsconf_unlock(); + return (error); + } + + if ((vfc->vfc_flags & VFCF_JAIL) != 0) + prison_add_vfs(vfc); + vfsconf_unlock(); /* |