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);
204 int mp_afs_smoothsync(struct mount *mp, u_int age, u_int smsync_flag)
206 AFS_STATCNT(afs_sync);
211 int mp_afs_fhtovp(struct mount *afsp, struct fid *fidp, struct vnode **avcp)
213 struct vrequest treq;
217 AFS_STATCNT(afs_vget);
221 if ((code = afs_InitReq(&treq, u.u_cred)) == 0) {
222 code = afs_osi_vget((struct vcache**)avcp, fidp, &treq);
225 afs_Trace3(afs_iclSetp, CM_TRACE_VGET, ICL_TYPE_POINTER, *avcp,
226 ICL_TYPE_INT32, treq.uid, ICL_TYPE_FID, fidp);
228 code = afs_CheckCode(code, &treq, 42);
237 * afs_vptofh can return two flavors of NFS fid, depending on if submounts are
238 * allowed. The reason for this is that we can't guarantee that we found all
239 * the entry points any OS might use to get the fid for the NFS mountd.
240 * Hence we return a "magic" fid for all but /afs. If it goes through the
241 * translator code, it will get transformed into a SmallFid that we recognize.
242 * So, if submounts are disallowed, and an NFS client tries a submount, it will
243 * get a fid which we don't recognize and the mount will either fail or we
244 * will ignore subsequent requests for that mount.
246 * The Alpha fid is organized differently than for other platforms. Their
247 * intention was to have the data portion of the fid aligned on a 4 byte
248 * boundary. To do so, the fid is organized as:
252 * The len field is the length of the entire fid, from reserved through data.
253 * This length is used by fid_copy to include copying the reserved field.
254 * Alpha's zero the reserved field before handing us the fid, but they use
255 * it in fid_cmp. We use the reserved field to store the 16 bits of the Vnode.
257 * Note that the SmallFid only allows for 8 bits of the cell index and
258 * 16 bits of the vnode.
261 #define AFS_FIDDATASIZE 8
262 #define AFS_SIZEOFSMALLFID 12 /* full size of fid, including len field */
263 extern int afs_NFSRootOnly; /* 1 => only allow NFS mounts of /afs. */
264 int afs_fid_vnodeoverflow=0, afs_fid_uniqueoverflow=0;
266 int mp_afs_vptofh(struct vnode *avn, struct fid *fidp)
268 struct SmallFid Sfid;
270 register struct cell *tcell;
272 struct vcache *avc = (struct vcache *)avn;
275 AFS_STATCNT(afs_fid);
277 if (afs_shuttingdown) {
282 if (afs_NFSRootOnly && (avc == afs_globalVp)) rootvp = 1;
283 if (!afs_NFSRootOnly || rootvp) {
284 tcell = afs_GetCell(avc->fid.Cell, READ_LOCK);
285 Sfid.Volume = avc->fid.Fid.Volume;
286 fidp->fid_reserved = avc->fid.Fid.Vnode;
287 Sfid.CellAndUnique = ((tcell->cellIndex << 24) +
288 (avc->fid.Fid.Unique & 0xffffff));
289 afs_PutCell(tcell, READ_LOCK);
290 if (avc->fid.Fid.Vnode > 0xffff)
291 afs_fid_vnodeoverflow++;
292 if (avc->fid.Fid.Unique > 0xffffff)
293 afs_fid_uniqueoverflow++;
295 fidp->fid_reserved = AFS_XLATOR_MAGIC;
298 VN_HOLD((struct vnode *)avc);
302 /* Use the fid pointer passed to us. */
303 fidp->fid_len = AFS_SIZEOFSMALLFID;
304 if (afs_NFSRootOnly) {
306 bcopy((caddr_t)&Sfid, fidp->fid_data, AFS_FIDDATASIZE);
308 bcopy((caddr_t)addr, fidp->fid_data, AFS_FIDDATASIZE);
311 bcopy((caddr_t)&Sfid, fidp->fid_data, AFS_FIDDATASIZE);
318 int mp_Afs_init(void); /* vfs_init - defined below */
321 /* This is only called by vfs_mount when afs is going to be mounted as root.
322 * Since we don't support diskless clients we shouldn't come here.
325 int mp_afs_mountroot(struct mount *afsp, struct vnode **vp)
328 AFS_STATCNT(afs_mountroot);
335 /* It's called to setup swapping over the net for diskless clients; again
339 int mp_afs_swapvp(void)
342 AFS_STATCNT(afs_swapvp);
349 struct vfsops afs_vfsops = {
357 mp_afs_fhtovp, /* afs_vget */
369 * System Call Entry Points
371 #define NULL_FUNC (int (*)(int))0
373 int (*afs_syscall_func)() = NULL_FUNC;
374 int (*afs_xsetgroups_func)() = NULL_FUNC;
375 int (*afs_xioctl_func)() = NULL_FUNC;
377 afssyscall(p, args, retval)
386 func = afs_syscall_func;
387 if (func == NULL_FUNC) {
388 code = nosys(p, args, retval);
390 code = (*func)(p, args, retval);
396 afsxsetgroups(p, args, retval)
405 func = afs_xsetgroups_func;
406 if (func == NULL_FUNC) {
407 code = nosys(p, args, retval);
409 code = (*func)(p, args, retval);
415 afsxioctl(p, args, retval)
424 func = afs_xioctl_func;
425 if (func == NULL_FUNC) {
426 code = nosys(p, args, retval);
428 code = (*func)(p, args, retval);
436 * VFS initialization and unload
445 cfg_subsys_attr_t afs_attributes[] = {
446 {"", 0, 0, 0, 0, 0, 0} /* must be the last element */
449 afs_configure(cfg_op_t op, caddr_t indata, size_t indata_size, caddr_t outdata, size_t outdata_size)
451 cfg_attr_t *attributes;
457 case CFG_OP_CONFIGURE:
459 * The indata parameter is a list of attributes to be configured, and
460 * indata_size is the count of attributes.
462 if ((ret = vfssw_add_fsname(MOUNT_AFS, &afs_vfsops, "afs")) != 0)
465 case CFG_OP_UNCONFIGURE:
466 if ((ret = afs_unconfig()) != 0)
477 int mp_Afs_init(void)
479 extern int Afs_xsetgroups(), afs_xioctl(), afs3_syscall();
482 sysent[AFS_SYSCALL].sy_call = afs3_syscall;
483 sysent[AFS_SYSCALL].sy_parallel = 0;
484 sysent[AFS_SYSCALL].sy_narg = 6;
485 sysent[SYS_setgroups].sy_call = Afs_xsetgroups;
486 afs_xioctl_func = afsxioctl;
487 afs_xsetgroups_func = afsxsetgroups;
488 afs_syscall_func = afssyscall;