#include <afsconfig.h>
#include <afs/param.h>
-RCSID("$Header$");
-#include <afs/sysincludes.h> /* Standard vendor system headers */
-#include <afsincludes.h> /* Afs-based standard headers */
-#include <afs/afs_stats.h> /* statistics */
+#include <afs/sysincludes.h> /* Standard vendor system headers */
+#include <afsincludes.h> /* Afs-based standard headers */
+#include <afs/afs_stats.h> /* statistics */
#include <sys/malloc.h>
#include <sys/namei.h>
#include <sys/conf.h>
+#include <sys/module.h>
+#include <sys/sysproto.h>
#include <sys/syscall.h>
+#include <sys/sysent.h>
-struct vcache *afs_globalVp = 0;
-struct mount *afs_globalVFS = 0;
-int afs_pbuf_freecnt=-1;
-int
-afs_quotactl()
+struct vcache *afs_globalVp = NULL;
+struct mount *afs_globalVFS = NULL;
+int afs_pbuf_freecnt = -1;
+
+extern int Afs_xsetgroups();
+extern int afs_xioctl();
+
+static struct syscall_helper_data afs_syscalls[] = {
+ {
+ .syscall_no = AFS_SYSCALL,
+ .new_sysent = {
+ .sy_narg = 5,
+ .sy_call = (sy_call_t *)afs3_syscall,
+ .sy_auevent = AUE_NULL,
+ },
+ },
+ SYSCALL_INIT_LAST
+};
+
+static int
+afs_init(struct vfsconf *vfc)
{
- return EOPNOTSUPP;
+ int code;
+#if defined(FBSD_SYSCALL_REGISTER_TAKES_FLAGS)
+ code = syscall_helper_register(afs_syscalls, 0);
+#else
+ code = syscall_helper_register(afs_syscalls);
+#endif
+ if (code) {
+ printf("AFS_SYSCALL in use, error %i. aborting\n", code);
+ return code;
+ }
+ osi_Init();
+ afs_pbuf_freecnt = nswbuf / 2 + 1;
+ return 0;
}
-int
-afs_fhtovp(mp, fhp, vpp)
-struct mount *mp;
-struct fid *fhp;
-struct vnode **vpp;
+static int
+afs_uninit(struct vfsconf *vfc)
{
+ if (afs_globalVFS)
+ return EBUSY;
- return (EINVAL);
+ return syscall_helper_unregister(afs_syscalls);
}
-int
-afs_vptofh(vp, fhp)
-struct vnode *vp;
-struct fid *fhp;
+static int
+afs_statfs(struct mount *mp, struct statfs *abp)
{
+ AFS_GLOCK();
+ AFS_STATCNT(afs_statfs);
- return (EINVAL);
-}
+ abp->f_bsize = mp->vfs_bsize;
+ abp->f_iosize = mp->vfs_bsize;
-int
-afs_start(mp, flags, p)
-struct mount *mp;
-int flags;
-struct proc *p;
-{
- afs_pbuf_freecnt = nswbuf / 2 + 1;
- return (0); /* nothing to do. ? */
+ abp->f_blocks = abp->f_bfree = abp->f_bavail = abp->f_files =
+ abp->f_ffree = AFS_VFS_FAKEFREE;
+
+ abp->f_fsid.val[0] = mp->mnt_stat.f_fsid.val[0];
+ abp->f_fsid.val[1] = mp->mnt_stat.f_fsid.val[1];
+ if (abp != &mp->mnt_stat) {
+ abp->f_type = mp->mnt_vfc->vfc_typenum;
+ memcpy((caddr_t) & abp->f_mntonname[0],
+ (caddr_t) mp->mnt_stat.f_mntonname, MNAMELEN);
+ memcpy((caddr_t) & abp->f_mntfromname[0],
+ (caddr_t) mp->mnt_stat.f_mntfromname, MNAMELEN);
+ }
+
+ AFS_GUNLOCK();
+ return 0;
}
-int
-afs_mount(mp, path, data, ndp, p)
-register struct mount *mp;
-char *path;
-caddr_t data;
-struct nameidata *ndp;
-struct proc *p;
+static int
+afs_omount(struct mount *mp, char *path, caddr_t data)
{
/* ndp contains the mounted-from device. Just ignore it.
- we also don't care about our proc struct. */
+ * we also don't care about our thread struct. */
size_t size;
if (mp->mnt_flag & MNT_UPDATE)
AFS_GLOCK();
AFS_STATCNT(afs_mount);
- if (afs_globalVFS) { /* Don't allow remounts. */
+ if (afs_globalVFS) { /* Don't allow remounts. */
AFS_GUNLOCK();
- return (EBUSY);
+ return EBUSY;
}
afs_globalVFS = mp;
mp->vfs_bsize = 8192;
vfs_getnewfsid(mp);
- mp->mnt_stat.f_iosize=8192;
-
- (void) copyinstr(path, mp->mnt_stat.f_mntonname, MNAMELEN-1, &size);
+ /*
+ * This is kind of ugly, as the interlock has grown to encompass
+ * more fields over time and there's not a good way to group the
+ * code without duplication.
+ */
+ MNT_ILOCK(mp);
+ mp->mnt_flag &= ~MNT_LOCAL;
+#if __FreeBSD_version < 1000021
+ mp->mnt_kern_flag |= MNTK_MPSAFE; /* solid steel */
+#endif
+ /*
+ * XXX mnt_stat "is considered stable as long as a ref is held".
+ * We should check that we hold the only ref.
+ */
+ mp->mnt_stat.f_iosize = 8192;
+
+ if (path != NULL)
+ copyinstr(path, mp->mnt_stat.f_mntonname, MNAMELEN - 1, &size);
+ else
+ bcopy("/afs", mp->mnt_stat.f_mntonname, size = 4);
memset(mp->mnt_stat.f_mntonname + size, 0, MNAMELEN - size);
memset(mp->mnt_stat.f_mntfromname, 0, MNAMELEN);
strcpy(mp->mnt_stat.f_mntfromname, "AFS");
/* null terminated string "AFS" will fit, just leave it be. */
strcpy(mp->mnt_stat.f_fstypename, "afs");
+ MNT_IUNLOCK(mp);
AFS_GUNLOCK();
- (void) afs_statfs(mp, &mp->mnt_stat, p);
+ afs_statfs(mp, &mp->mnt_stat);
+
return 0;
}
-int
-afs_unmount(mp, flags, p)
-struct mount *mp;
-int flags;
-struct proc *p;
+static int
+afs_mount(struct mount *mp)
+{
+ return afs_omount(mp, NULL, NULL);
+}
+
+static int
+#if __FreeBSD_version >= 1000004
+afs_cmount(struct mntarg *ma, void *data, uint64_t flags)
+#else
+afs_cmount(struct mntarg *ma, void *data, int flags)
+#endif
+{
+ return kernel_mount(ma, flags);
+}
+
+static int
+afs_unmount(struct mount *mp, int flags)
{
-
+ int error = 0;
+
+ AFS_GLOCK();
+ if (afs_globalVp &&
+ ((flags & MNT_FORCE) || !VREFCOUNT_GT(afs_globalVp, 1))) {
+ /* Put back afs_root's ref */
+ struct vcache *gvp = afs_globalVp;
+ afs_globalVp = NULL;
+ afs_PutVCache(gvp);
+ }
+ if (afs_globalVp)
+ error = EBUSY;
+ AFS_GUNLOCK();
+
+ if (!error) {
+ /*
+ * Release any remaining vnodes on this mount point. The second
+ * argument is how many refs we hold on the root vnode. Since we
+ * released our reference to the root vnode up above, give 0.
+ */
+ error = vflush(mp, 0, (flags & MNT_FORCE) ? FORCECLOSE : 0, curthread);
+ }
+ if (error)
+ goto out;
AFS_GLOCK();
AFS_STATCNT(afs_unmount);
afs_globalVFS = 0;
- afs_shutdown();
+ afs_shutdown(AFS_WARM);
AFS_GUNLOCK();
- return 0;
+out:
+ return error;
}
-int
-afs_root(struct mount *mp,
- struct vnode **vpp)
+static int
+afs_root(struct mount *mp, int flags, struct vnode **vpp)
{
int error;
struct vrequest treq;
- register struct vcache *tvp = 0;
-#ifdef AFS_FBSD50_ENV
+ struct vcache *tvp = 0;
+ struct vcache *gvp;
struct thread *td = curthread;
- struct ucred cr = *td->td_ucred;
-#else
- struct proc *p = curproc;
- struct ucred cr = *p->p_cred->pc_ucred;
-#endif
+ struct ucred *cr = osi_curcred();
AFS_GLOCK();
AFS_STATCNT(afs_root);
- if (afs_globalVp && (afs_globalVp->states & CStatd)) {
+ crhold(cr);
+tryagain:
+ if (afs_globalVp && (afs_globalVp->f.states & CStatd)) {
tvp = afs_globalVp;
- error=0;
+ error = 0;
} else {
- if (afs_globalVp) {
- afs_PutVCache(afs_globalVp);
- afs_globalVp = NULL;
- }
-
- if (!(error = afs_InitReq(&treq, &cr)) &&
- !(error = afs_CheckInit())) {
- tvp = afs_GetVCache(&afs_rootFid, &treq, NULL, NULL);
+ if (!(error = afs_InitReq(&treq, cr)) && !(error = afs_CheckInit())) {
+ tvp = afs_GetVCache(&afs_rootFid, &treq);
/* we really want this to stay around */
if (tvp) {
- afs_globalVp = tvp;
+ gvp = afs_globalVp;
+ afs_globalVp = tvp;
+ if (gvp) {
+ afs_PutVCache(gvp);
+ if (tvp != afs_globalVp) {
+ /* someone raced us and won */
+ afs_PutVCache(tvp);
+ goto tryagain;
+ }
+ }
} else
- error = ENOENT;
+ error = EIO;
}
}
if (tvp) {
- osi_vnhold(tvp,0);
- AFS_GUNLOCK();
-#ifdef AFS_FBSD50_ENV
- vn_lock(AFSTOV(tvp), LK_EXCLUSIVE | LK_RETRY, td);
-#else
- vn_lock(AFSTOV(tvp), LK_EXCLUSIVE | LK_RETRY, p);
-#endif
- AFS_GLOCK();
+ struct vnode *vp = AFSTOV(tvp);
+
+ ASSERT_VI_UNLOCKED(vp, "afs_root");
+ AFS_GUNLOCK();
+ error = vget(vp, LK_EXCLUSIVE | LK_RETRY, td);
+ AFS_GLOCK();
+ /* we dropped the glock, so re-check everything it had serialized */
+ if (!afs_globalVp || !(afs_globalVp->f.states & CStatd) ||
+ tvp != afs_globalVp) {
+ vput(vp);
+ afs_PutVCache(tvp);
+ goto tryagain;
+ }
+ if (error != 0)
+ goto tryagain;
+ /*
+ * I'm uncomfortable about this. Shouldn't this happen at a
+ * higher level, and shouldn't we busy the top-level directory
+ * to prevent recycling?
+ */
+ vp->v_vflag |= VV_ROOT;
+
afs_globalVFS = mp;
- *vpp = AFSTOV(tvp);
- tvp->v.v_flag |= VROOT;
+ *vpp = vp;
}
- afs_Trace2(afs_iclSetp, CM_TRACE_VFSROOT, ICL_TYPE_POINTER, *vpp,
+ afs_Trace2(afs_iclSetp, CM_TRACE_VFSROOT, ICL_TYPE_POINTER, tvp ? AFSTOV(tvp) : NULL,
ICL_TYPE_INT32, error);
AFS_GUNLOCK();
+ crfree(cr);
return error;
}
-int
-afs_vget(mp, lfl, vp)
-struct mount *mp;
-struct vnode *vp;
-int lfl;
-{
- int error;
-
- printf("vget called. help!\n");
- if (vp->v_usecount < 0) {
- vprint("bad usecount", vp);
- panic("afs_vget");
- }
-#ifdef AFS_FBSD50_ENV
- error = vget(vp, lfl, curthread);
-#else
- error = vget(vp, lfl, curproc);
-#endif
- if (!error)
- insmntque(vp, afs_globalVFS); /* take off free list */
- return error;
-}
-
-int afs_statfs(struct mount *mp, struct statfs *abp, struct proc *p)
+static int
+afs_sync(struct mount *mp, int waitfor)
{
- AFS_GLOCK();
- AFS_STATCNT(afs_statfs);
-
-#if 0
- abp->f_type = MOUNT_AFS;
-#endif
- abp->f_bsize = mp->vfs_bsize;
- abp->f_iosize = mp->vfs_bsize;
-
- /* Fake a high number below to satisfy programs that use the statfs call
- * to make sure that there's enough space in the device partition before
- * storing something there.
- */
- abp->f_blocks = abp->f_bfree = abp->f_bavail = abp->f_files =
- abp->f_ffree = 2000000;
-
- abp->f_fsid.val[0] = mp->mnt_stat.f_fsid.val[0];
- abp->f_fsid.val[1] = mp->mnt_stat.f_fsid.val[1];
- if (abp != &mp->mnt_stat) {
- abp->f_type = mp->mnt_vfc->vfc_typenum;
- memcpy((caddr_t)&abp->f_mntonname[0], (caddr_t)mp->mnt_stat.f_mntonname, MNAMELEN);
- memcpy((caddr_t)&abp->f_mntfromname[0], (caddr_t)mp->mnt_stat.f_mntfromname, MNAMELEN);
- }
-
- AFS_GUNLOCK();
return 0;
}
-int afs_sync(mp, waitfor, cred, p)
-struct mount *mp;
-int waitfor;
-struct ucred *cred;
-struct prioc *p;
-{
-return 0;
-}
-
-int afs_sysctl() {
- return EOPNOTSUPP;
-}
-
-
-int afs_init(struct vfsconf *vfc) {
- return 0;
-}
-
struct vfsops afs_vfsops = {
- afs_mount,
- afs_start,
- afs_unmount,
- afs_root,
- afs_quotactl,
- afs_statfs,
- afs_sync,
- afs_vget,
- afs_fhtovp,
-#ifdef AFS_FBSD50_ENV
- vfs_stdcheckexp,
-#endif
- afs_vptofh,
- afs_init,
-#ifdef AFS_FBSD50_ENV
- vfs_stduninit,
-#endif
- afs_sysctl
+ .vfs_init = afs_init,
+ .vfs_mount = afs_mount,
+ .vfs_cmount = afs_cmount,
+ .vfs_root = afs_root,
+ .vfs_statfs = afs_statfs,
+ .vfs_sync = afs_sync,
+ .vfs_uninit = afs_uninit,
+ .vfs_unmount = afs_unmount,
+ .vfs_sysctl = vfs_stdsysctl,
};
git://git.openafs.org / openafs.git / blobdiff