2 * Copyright 2000, International Business Machines Corporation and others.
5 * This software has been released under the terms of the IBM Public
6 * License. For details, see the LICENSE file in the top-level source
7 * directory or online at http://www.openafs.org/dl/license10.html
11 * osi_vfsops.c for DUX
13 #include "../afs/param.h" /* Should be always first */
14 #include "../afs/sysincludes.h" /* Standard vendor system headers */
15 #include "../afs/afsincludes.h" /* Afs-based standard headers */
16 #include "../afs/afs_stats.h" /* statistics stuff */
17 #include <sys/types.h>
18 #include <kern/mach_param.h>
19 #include <sys/sysconfig.h>
20 #include <sys/systm.h>
21 #include <sys/resource.h>
22 #include <sys/errno.h>
24 #include <machine/machlimits.h>
27 struct vcache *afs_globalVp = 0;
28 struct mount *afs_globalVFS = 0;
30 static u_char afs_mntid;
32 udecl_simple_lock_data(, afsmntid_lock)
33 #define AFSMNTID_LOCK() usimple_lock(&afsmntid_lock)
34 #define AFSMNTID_UNLOCK() usimple_unlock(&afsmntid_lock)
35 #define AFSMNTID_LOCK_INIT() usimple_lock_init(&afsmntid_lock)
38 int mp_afs_mount(struct mount *afsp,char * path, caddr_t data,
39 struct nameidata *ndp)
44 struct mount *xmp, *getvfs();
48 AFS_STATCNT(afs_mount);
50 if (afs_globalVFS) { /* Don't allow remounts. */
56 afsp->vfs_bsize = 8192;
58 * Generate a unique afs mount i.d. ( see nfs_mount() ).
60 afsp->m_stat.f_fsid.val[0] = makedev(130, 0);
61 afsp->m_stat.f_fsid.val[1] = MOUNT_AFS;
67 tfsid.val[0] = makedev(130, afs_mntid);
68 tfsid.val[1] = MOUNT_AFS;
69 BM(AFSMNTID_UNLOCK());
71 while (xmp = getvfs(&tfsid)) {
72 UNMOUNT_READ_UNLOCK(xmp);
78 if (major(tfsid.val[0]) != 130) {
82 afsp->m_stat.f_fsid.val[0] = tfsid.val[0];
84 afsp->m_stat.f_mntonname = AFS_KALLOC(MNAMELEN);
85 afsp->m_stat.f_mntfromname = AFS_KALLOC(MNAMELEN);
86 if ( !afsp->m_stat.f_mntonname || !afsp->m_stat.f_mntfromname)
87 panic("malloc failure in afs_mount\n");
89 bzero(afsp->m_stat.f_mntonname, MNAMELEN);
90 bzero(afsp->m_stat.f_mntfromname, MNAMELEN);
91 AFS_COPYINSTR(path, (caddr_t)afsp->m_stat.f_mntonname, MNAMELEN, &size, code);
92 bcopy("AFS", afsp->m_stat.f_mntfromname, 4);
94 (void) mp_afs_statfs(afsp);
96 afs_vfsdev = afsp->m_stat.f_fsid.val[0];
98 #ifndef AFS_NONFSTRANS
99 /* Set up the xlator in case it wasn't done elsewhere */
108 int mp_afs_unmount (struct mount *afsp, int flag)
111 AFS_STATCNT(afs_unmount);
119 int mp_afs_start(struct mount *mp, int flags)
124 int mp_afs_root (struct mount *afsp, struct vnode **avpp)
126 register afs_int32 code = 0;
127 struct vrequest treq;
128 register struct vcache *tvp=0;
131 AFS_STATCNT(afs_root);
132 if (afs_globalVp && (afs_globalVp->states & CStatd)) {
135 if (!(code = afs_InitReq(&treq, u.u_cred)) &&
136 !(code = afs_CheckInit())) {
137 tvp = afs_GetVCache(&afs_rootFid, &treq, (afs_int32 *)0,
138 (struct vcache*)0, WRITE_LOCK);
139 /* we really want this to stay around */
148 VN_HOLD((struct vnode *)tvp);
149 VN_LOCK((struct vnode *)tvp);
150 tvp->v.v_flag |= VROOT; /* No-op on Ultrix 2.2 */
151 VN_UNLOCK((struct vnode *)tvp);
154 afs_globalVFS = afsp;
155 *avpp = (struct vnode *) tvp;
158 afs_Trace2(afs_iclSetp, CM_TRACE_VFSROOT, ICL_TYPE_POINTER, *avpp,
159 ICL_TYPE_INT32, code);
165 mp_afs_quotactl(struct mount *mp, int cmd, uid_t uid, caddr_t arg)
170 int mp_afs_statfs(struct mount *afsp)
172 struct nstatfs *abp = &afsp->m_stat;
175 AFS_STATCNT(afs_statfs);
177 abp->f_type = MOUNT_AFS;
178 abp->f_bsize = afsp->vfs_bsize;
180 /* Fake a high number below to satisfy programs that use the statfs call
181 * to make sure that there's enough space in the device partition before
182 * storing something there.
184 abp->f_blocks = abp->f_bfree = abp->f_bavail = abp->f_files =
185 abp->f_ffree = 2000000;
188 abp->f_fsid.val[0] = afsp->m_stat.f_fsid.val[0];
189 abp->f_fsid.val[1] = afsp->m_stat.f_fsid.val[1];
196 int mp_afs_sync(struct mount *mp, int flags)
198 AFS_STATCNT(afs_sync);
203 int mp_afs_fhtovp(struct mount *afsp, struct fid *fidp, struct vnode **avcp)
205 struct vrequest treq;
209 AFS_STATCNT(afs_vget);
213 if ((code = afs_InitReq(&treq, u.u_cred)) == 0) {
214 code = afs_osi_vget((struct vcache**)avcp, fidp, &treq);
217 afs_Trace3(afs_iclSetp, CM_TRACE_VGET, ICL_TYPE_POINTER, *avcp,
218 ICL_TYPE_INT32, treq.uid, ICL_TYPE_FID, fidp);
220 code = afs_CheckCode(code, &treq, 42);
229 * afs_vptofh can return two flavors of NFS fid, depending on if submounts are
230 * allowed. The reason for this is that we can't guarantee that we found all
231 * the entry points any OS might use to get the fid for the NFS mountd.
232 * Hence we return a "magic" fid for all but /afs. If it goes through the
233 * translator code, it will get transformed into a SmallFid that we recognize.
234 * So, if submounts are disallowed, and an NFS client tries a submount, it will
235 * get a fid which we don't recognize and the mount will either fail or we
236 * will ignore subsequent requests for that mount.
238 * The Alpha fid is organized differently than for other platforms. Their
239 * intention was to have the data portion of the fid aligned on a 4 byte
240 * boundary. To do so, the fid is organized as:
244 * The len field is the length of the entire fid, from reserved through data.
245 * This length is used by fid_copy to include copying the reserved field.
246 * Alpha's zero the reserved field before handing us the fid, but they use
247 * it in fid_cmp. We use the reserved field to store the 16 bits of the Vnode.
249 * Note that the SmallFid only allows for 8 bits of the cell index and
250 * 16 bits of the vnode.
253 #define AFS_FIDDATASIZE 8
254 #define AFS_SIZEOFSMALLFID 12 /* full size of fid, including len field */
255 extern int afs_NFSRootOnly; /* 1 => only allow NFS mounts of /afs. */
256 int afs_fid_vnodeoverflow=0, afs_fid_uniqueoverflow=0;
258 int mp_afs_vptofh(struct vnode *avn, struct fid *fidp)
260 struct SmallFid Sfid;
262 register struct cell *tcell;
264 struct vcache *avc = (struct vcache *)avn;
267 AFS_STATCNT(afs_fid);
269 if (afs_shuttingdown) {
274 if (afs_NFSRootOnly && (avc == afs_globalVp)) rootvp = 1;
275 if (!afs_NFSRootOnly || rootvp) {
276 tcell = afs_GetCell(avc->fid.Cell, READ_LOCK);
277 Sfid.Volume = avc->fid.Fid.Volume;
278 fidp->fid_reserved = avc->fid.Fid.Vnode;
279 Sfid.CellAndUnique = ((tcell->cellIndex << 24) +
280 (avc->fid.Fid.Unique & 0xffffff));
281 afs_PutCell(tcell, READ_LOCK);
282 if (avc->fid.Fid.Vnode > 0xffff)
283 afs_fid_vnodeoverflow++;
284 if (avc->fid.Fid.Unique > 0xffffff)
285 afs_fid_uniqueoverflow++;
287 fidp->fid_reserved = AFS_XLATOR_MAGIC;
290 VN_HOLD((struct vnode *)avc);
294 /* Use the fid pointer passed to us. */
295 fidp->fid_len = AFS_SIZEOFSMALLFID;
296 if (afs_NFSRootOnly) {
298 bcopy((caddr_t)&Sfid, fidp->fid_data, AFS_FIDDATASIZE);
300 bcopy((caddr_t)addr, fidp->fid_data, AFS_FIDDATASIZE);
303 bcopy((caddr_t)&Sfid, fidp->fid_data, AFS_FIDDATASIZE);
310 int mp_Afs_init(void); /* vfs_init - defined below */
313 /* This is only called by vfs_mount when afs is going to be mounted as root.
314 * Since we don't support diskless clients we shouldn't come here.
317 int mp_afs_mountroot(struct mount *afsp, struct vnode **vp)
320 AFS_STATCNT(afs_mountroot);
327 /* It's called to setup swapping over the net for diskless clients; again
331 int mp_afs_swapvp(void)
334 AFS_STATCNT(afs_swapvp);
341 struct vfsops afs_vfsops = {
349 mp_afs_fhtovp, /* afs_vget */
358 * System Call Entry Points
360 #define NULL_FUNC (int (*)(int))0
362 int (*afs_syscall_func)() = NULL_FUNC;
363 int (*afs_xsetgroups_func)() = NULL_FUNC;
364 int (*afs_xioctl_func)() = NULL_FUNC;
366 afssyscall(p, args, retval)
375 func = afs_syscall_func;
376 if (func == NULL_FUNC) {
377 code = nosys(p, args, retval);
379 code = (*func)(p, args, retval);
385 afsxsetgroups(p, args, retval)
394 func = afs_xsetgroups_func;
395 if (func == NULL_FUNC) {
396 code = nosys(p, args, retval);
398 code = (*func)(p, args, retval);
404 afsxioctl(p, args, retval)
413 func = afs_xioctl_func;
414 if (func == NULL_FUNC) {
415 code = nosys(p, args, retval);
417 code = (*func)(p, args, retval);
425 * VFS initialization and unload
434 cfg_subsys_attr_t afs_attributes[] = {
435 {"", 0, 0, 0, 0, 0, 0} /* must be the last element */
438 afs_configure(cfg_op_t op, caddr_t indata, size_t indata_size, caddr_t outdata, size_t outdata_size)
440 cfg_attr_t *attributes;
446 case CFG_OP_CONFIGURE:
448 * The indata parameter is a list of attributes to be configured, and
449 * indata_size is the count of attributes.
451 if ((ret = vfssw_add_fsname(MOUNT_AFS, &afs_vfsops, "afs")) != 0)
454 case CFG_OP_UNCONFIGURE:
455 if ((ret = afs_unconfig()) != 0)
466 int mp_Afs_init(void)
468 extern int Afs_xsetgroups(), afs_xioctl(), afs3_syscall();
471 sysent[AFS_SYSCALL].sy_call = afs3_syscall;
472 sysent[AFS_SYSCALL].sy_parallel = 0;
473 sysent[AFS_SYSCALL].sy_narg = 6;
474 sysent[SYS_setgroups].sy_call = Afs_xsetgroups;
475 afs_xioctl_func = afsxioctl;
476 afs_xsetgroups_func = afsxsetgroups;
477 afs_syscall_func = afssyscall;