afs_rename(OSI_VC_DECL(aodp), char *aname1, struct vcache *andp, char *aname2, struct AFS_UCRED *acred)
#endif
{
register afs_int32 code;
struct afs_fakestat_state ofakestate;
struct afs_fakestat_state nfakestate;
struct vrequest treq;
OSI_VC_CONVERT(aodp);
code = afs_InitReq(&treq, acred);
if (code)
return code;
afs_InitFakeStat(&ofakestate);
afs_InitFakeStat(&nfakestate);
AFS_DISCON_LOCK();
code = afs_EvalFakeStat(&aodp, &ofakestate, &treq);
if (code)
goto done;
code = afs_EvalFakeStat(&andp, &nfakestate, &treq);
if (code)
goto done;
code = afsrename(aodp, aname1, andp, aname2, acred, &treq);
done:
afs_PutFakeStat(&ofakestate);
afs_PutFakeStat(&nfakestate);
AFS_DISCON_UNLOCK();
code = afs_CheckCode(code, &treq, 25);
return code;
}
int
afs_readlink(OSI_VC_DECL(avc), struct uio *auio, afs_ucred_t *acred)
{
afs_int32 code;
struct vrequest *treq = NULL;
char *tp;
struct afs_fakestat_state fakestat;
OSI_VC_CONVERT(avc);
AFS_STATCNT(afs_readlink);
afs_Trace1(afs_iclSetp, CM_TRACE_READLINK, ICL_TYPE_POINTER, avc);
if ((code = afs_CreateReq(&treq, acred)))
return code;
afs_InitFakeStat(&fakestat);
AFS_DISCON_LOCK();
code = afs_EvalFakeStat(&avc, &fakestat, treq);
if (code)
goto done;
code = afs_VerifyVCache(avc, treq);
if (code)
goto done;
if (vType(avc) != VLNK) {
code = EINVAL;
goto done;
}
ObtainWriteLock(&avc->lock, 158);
code = afs_HandleLink(avc, treq);
/* finally uiomove it to user-land */
if (code == 0) {
tp = avc->linkData;
if (tp)
AFS_UIOMOVE(tp, strlen(tp), UIO_READ, auio, code);
else {
code = EIO;
}
}
ReleaseWriteLock(&avc->lock);
done:
afs_PutFakeStat(&fakestat);
AFS_DISCON_UNLOCK();
code = afs_CheckCode(code, treq, 32);
afs_DestroyReq(treq);
return code;
}
/* question: does afs_create need to set CDirty in the adp or the avc?
* I think we can get away without it, but I'm not sure. Note that
* afs_setattr is called in here for truncation.
*/
#ifdef AFS_SGI64_ENV
int
afs_create(OSI_VC_DECL(adp), char *aname, struct vattr *attrs, int flags,
int amode, struct vcache **avcp, afs_ucred_t *acred)
#else /* AFS_SGI64_ENV */
int
afs_create(OSI_VC_DECL(adp), char *aname, struct vattr *attrs,
enum vcexcl aexcl, int amode, struct vcache **avcp,
afs_ucred_t *acred)
#endif /* AFS_SGI64_ENV */
{
afs_int32 origCBs, origZaps, finalZaps;
struct vrequest *treq = NULL;
afs_int32 code;
struct afs_conn *tc;
struct VenusFid newFid;
struct AFSStoreStatus InStatus;
struct AFSFetchStatus *OutFidStatus, *OutDirStatus;
struct AFSVolSync tsync;
struct AFSCallBack CallBack;
afs_int32 now;
struct dcache *tdc;
afs_size_t offset, len;
struct server *hostp = 0;
struct vcache *tvc;
struct volume *volp = 0;
struct afs_fakestat_state fakestate;
struct rx_connection *rxconn;
XSTATS_DECLS;
OSI_VC_CONVERT(adp);
AFS_STATCNT(afs_create);
OutFidStatus = osi_AllocSmallSpace(sizeof(struct AFSFetchStatus));
OutDirStatus = osi_AllocSmallSpace(sizeof(struct AFSFetchStatus));
memset(&InStatus, 0, sizeof(InStatus));
if ((code = afs_CreateReq(&treq, acred)))
goto done2;
afs_Trace3(afs_iclSetp, CM_TRACE_CREATE, ICL_TYPE_POINTER, adp,
ICL_TYPE_STRING, aname, ICL_TYPE_INT32, amode);
afs_InitFakeStat(&fakestate);
#ifdef AFS_SGI65_ENV
/* If avcp is passed not null, it's the old reference to this file.
* We can use this to avoid create races. For now, just decrement
* the reference count on it.
*/
if (*avcp) {
AFS_RELE(AFSTOV(*avcp));
*avcp = NULL;
}
#endif
if (strlen(aname) > AFSNAMEMAX) {
code = ENAMETOOLONG;
goto done3;
}
if (!afs_ENameOK(aname)) {
code = EINVAL;
goto done3;
}
switch (attrs->va_type) {
case VBLK:
case VCHR:
#if !defined(AFS_SUN5_ENV)
case VSOCK:
#endif
case VFIFO:
/* We don't support special devices or FIFOs */
code = EINVAL;
goto done3;
default:
;
}
AFS_DISCON_LOCK();
code = afs_EvalFakeStat(&adp, &fakestate, treq);
if (code)
goto done;
tagain:
code = afs_VerifyVCache(adp, treq);
if (code)
goto done;
/** If the volume is read-only, return error without making an RPC to the
* fileserver
*/
if (adp->f.states & CRO) {
code = EROFS;
goto done;
}
if (AFS_IS_DISCONNECTED && !AFS_IS_DISCON_RW) {
code = ENETDOWN;
goto done;
}
tdc = afs_GetDCache(adp, (afs_size_t) 0, treq, &offset, &len, 1);
ObtainWriteLock(&adp->lock, 135);
if (tdc)
ObtainSharedLock(&tdc->lock, 630);
/*
* Make sure that the data in the cache is current. We may have
* received a callback while we were waiting for the write lock.
*/
if (!(adp->f.states & CStatd)
|| (tdc && !hsame(adp->f.m.DataVersion, tdc->f.versionNo))) {
ReleaseWriteLock(&adp->lock);
if (tdc) {
ReleaseSharedLock(&tdc->lock);
afs_PutDCache(tdc);
}
goto tagain;
}
if (tdc) {
/* see if file already exists. If it does, we only set
* the size attributes (to handle O_TRUNC) */
code = afs_dir_Lookup(tdc, aname, &newFid.Fid); /* use dnlc first xxx */
if (code == 0) {
ReleaseSharedLock(&tdc->lock);
afs_PutDCache(tdc);
ReleaseWriteLock(&adp->lock);
#ifdef AFS_SGI64_ENV
if (flags & VEXCL) {
#else
if (aexcl != NONEXCL) {
#endif
code = EEXIST; /* file exists in excl mode open */
goto done;
}
/* found the file, so use it */
newFid.Cell = adp->f.fid.Cell;
newFid.Fid.Volume = adp->f.fid.Fid.Volume;
tvc = NULL;
if (newFid.Fid.Unique == 0) {
tvc = afs_LookupVCache(&newFid, treq, NULL, adp, aname);
}
if (!tvc) /* lookup failed or wasn't called */
tvc = afs_GetVCache(&newFid, treq, NULL, NULL);
if (tvc) {
/* if the thing exists, we need the right access to open it.
* we must check that here, since no other checks are
* made by the open system call */
len = attrs->va_size; /* only do the truncate */
/*
* We used to check always for READ access before; the
* problem is that we will fail if the existing file
* has mode -w-w-w, which is wrong.
*/
if ((amode & VREAD)
&& !afs_AccessOK(tvc, PRSFS_READ, treq, CHECK_MODE_BITS)) {
afs_PutVCache(tvc);
code = EACCES;
goto done;
}
#if defined(AFS_DARWIN80_ENV)
if ((amode & VWRITE) || VATTR_IS_ACTIVE(attrs, va_data_size))
#elif defined(AFS_SUN5_ENV) || defined(AFS_SGI_ENV)
if ((amode & VWRITE) || (attrs->va_mask & AT_SIZE))
#else
if ((amode & VWRITE) || len != 0xffffffff)
#endif
{
/* needed for write access check */
tvc->f.parent.vnode = adp->f.fid.Fid.Vnode;
tvc->f.parent.unique = adp->f.fid.Fid.Unique;
/* need write mode for these guys */
if (!afs_AccessOK
(tvc, PRSFS_WRITE, treq, CHECK_MODE_BITS)) {
afs_PutVCache(tvc);
code = EACCES;
goto done;
}
}
#if defined(AFS_DARWIN80_ENV)
if (VATTR_IS_ACTIVE(attrs, va_data_size))
#elif defined(AFS_SUN5_ENV) || defined(AFS_SGI_ENV)
if (attrs->va_mask & AT_SIZE)
#else
if (len != 0xffffffff)
#endif
{
if (vType(tvc) != VREG) {
afs_PutVCache(tvc);
code = EISDIR;
goto done;
}
/* do a truncate */
#if defined(AFS_DARWIN80_ENV)
VATTR_INIT(attrs);
VATTR_SET_SUPPORTED(attrs, va_data_size);
VATTR_SET_ACTIVE(attrs, va_data_size);
#elif defined(UKERNEL)
attrs->va_mask = ATTR_SIZE;
#elif defined(AFS_SUN5_ENV) || defined(AFS_SGI_ENV)
attrs->va_mask = AT_SIZE;
#else
VATTR_NULL(attrs);
#endif
attrs->va_size = len;
ObtainWriteLock(&tvc->lock, 136);
tvc->f.states |= CCreating;
ReleaseWriteLock(&tvc->lock);
#if defined(AFS_SUN5_ENV) || defined(AFS_SGI_ENV)
#if defined(AFS_SGI64_ENV)
code =
afs_setattr(VNODE_TO_FIRST_BHV((vnode_t *) tvc),
attrs, 0, acred);
#else
code = afs_setattr(tvc, attrs, 0, acred);
#endif /* AFS_SGI64_ENV */
#else /* SUN5 || SGI */
code = afs_setattr(tvc, attrs, acred);
#endif /* SUN5 || SGI */
ObtainWriteLock(&tvc->lock, 137);
tvc->f.states &= ~CCreating;
ReleaseWriteLock(&tvc->lock);
if (code) {
afs_PutVCache(tvc);
goto done;
}
}
*avcp = tvc;
} else
code = ENOENT; /* shouldn't get here */
/* make sure vrefCount bumped only if code == 0 */
goto done;
}
}
/* if we create the file, we don't do any access checks, since
* that's how O_CREAT is supposed to work */
if (adp->f.states & CForeign) {
origCBs = afs_allCBs;
origZaps = afs_allZaps;
} else {
origCBs = afs_evenCBs; /* if changes, we don't really have a callback */
origZaps = afs_evenZaps; /* number of even numbered vnodes discarded */
}
InStatus.Mask = AFS_SETMODTIME | AFS_SETMODE | AFS_SETGROUP;
InStatus.ClientModTime = osi_Time();
InStatus.Group = (afs_int32) afs_cr_gid(acred);
if (AFS_NFSXLATORREQ(acred)) {
/*
* XXX The following is mainly used to fix a bug in the HP-UX
* nfs client where they create files with mode of 0 without
* doing any setattr later on to fix it. * XXX
*/
#if defined(AFS_AIX_ENV)
if (attrs->va_mode != -1) {
#else
#if defined(AFS_SUN5_ENV) || defined(AFS_SGI_ENV)
if (attrs->va_mask & AT_MODE) {
#else
if (attrs->va_mode != ((unsigned short)-1)) {
#endif
#endif
if (!attrs->va_mode)
attrs->va_mode = 0x1b6; /* XXX default mode: rw-rw-rw XXX */
}
}
if (!AFS_IS_DISCONNECTED) {
/* If not disconnected, connect to the server.*/
InStatus.UnixModeBits = attrs->va_mode & 0xffff; /* only care about protection bits */
do {
tc = afs_Conn(&adp->f.fid, treq, SHARED_LOCK, &rxconn);
if (tc) {
hostp = tc->srvr->server; /* remember for callback processing */
now = osi_Time();
XSTATS_START_TIME(AFS_STATS_FS_RPCIDX_CREATEFILE);
RX_AFS_GUNLOCK();
code =
RXAFS_CreateFile(rxconn, (struct AFSFid *)&adp->f.fid.Fid,
aname, &InStatus, (struct AFSFid *)
&newFid.Fid, OutFidStatus, OutDirStatus,
&CallBack, &tsync);
RX_AFS_GLOCK();
XSTATS_END_TIME;
CallBack.ExpirationTime += now;
} else
code = -1;
} while (afs_Analyze
(tc, rxconn, code, &adp->f.fid, treq, AFS_STATS_FS_RPCIDX_CREATEFILE,
SHARED_LOCK, NULL));
if ((code == EEXIST || code == UAEEXIST) &&
#ifdef AFS_SGI64_ENV
!(flags & VEXCL)
#else /* AFS_SGI64_ENV */
aexcl == NONEXCL
#endif
) {
/* if we get an EEXIST in nonexcl mode, just do a lookup */
if (tdc) {
ReleaseSharedLock(&tdc->lock);
afs_PutDCache(tdc);
}
ReleaseWriteLock(&adp->lock);
#if defined(AFS_SGI64_ENV)
code = afs_lookup(VNODE_TO_FIRST_BHV((vnode_t *) adp), aname, avcp,
NULL, 0, NULL, acred);
#elif defined(AFS_SUN5_ENV) || defined(AFS_SGI_ENV)
code = afs_lookup(adp, aname, avcp, NULL, 0, NULL, acred);
#elif defined(UKERNEL)
code = afs_lookup(adp, aname, avcp, acred, 0);
#elif !defined(AFS_DARWIN_ENV)
code = afs_lookup(adp, aname, avcp, acred);
#endif
goto done;
}
if (code) {
if (code < 0) {
ObtainWriteLock(&afs_xcbhash, 488);
afs_DequeueCallback(adp);
adp->f.states &= ~CStatd;
ReleaseWriteLock(&afs_xcbhash);
osi_dnlc_purgedp(adp);
}
ReleaseWriteLock(&adp->lock);
if (tdc) {
ReleaseSharedLock(&tdc->lock);
afs_PutDCache(tdc);
}
goto done;
}
} else {
/* Generate a fake FID for disconnected mode. */
newFid.Cell = adp->f.fid.Cell;
newFid.Fid.Volume = adp->f.fid.Fid.Volume;
afs_GenFakeFid(&newFid, VREG, 1);
} /* if (!AFS_IS_DISCON_RW) */
/* otherwise, we should see if we can make the change to the dir locally */
if (tdc)
UpgradeSToWLock(&tdc->lock, 631);
if (AFS_IS_DISCON_RW || afs_LocalHero(adp, tdc, OutDirStatus, 1)) {
/* we can do it locally */
ObtainWriteLock(&afs_xdcache, 291);
code = afs_dir_Create(tdc, aname, &newFid.Fid);
ReleaseWriteLock(&afs_xdcache);
if (code) {
ZapDCE(tdc);
DZap(tdc);
}
}
if (tdc) {
ReleaseWriteLock(&tdc->lock);
afs_PutDCache(tdc);
}
if (AFS_IS_DISCON_RW)
adp->f.m.LinkCount++;
newFid.Cell = adp->f.fid.Cell;
newFid.Fid.Volume = adp->f.fid.Fid.Volume;
ReleaseWriteLock(&adp->lock);
volp = afs_FindVolume(&newFid, READ_LOCK);
/* New tricky optimistic callback handling algorithm for file creation works
* as follows. We create the file essentially with no locks set at all. File
* server may thus handle operations from others cache managers as well as from
* this very own cache manager that reference the file in question before
* we managed to create the cache entry. However, if anyone else changes
* any of the status information for a file, we'll see afs_evenCBs increase
* (files always have even fids). If someone on this workstation manages
* to do something to the file, they'll end up having to create a cache
* entry for the new file. Either we'll find it once we've got the afs_xvcache
* lock set, or it was also *deleted* the vnode before we got there, in which case
* we will find evenZaps has changed, too. Thus, we only assume we have the right
* status information if no callbacks or vnode removals have occurred to even
* numbered files from the time the call started until the time that we got the xvcache
* lock set. Of course, this also assumes that any call that modifies a file first
* gets a write lock on the file's vnode, but if that weren't true, the whole cache manager
* would fail, since no call would be able to update the local vnode status after modifying
* a file on a file server. */
ObtainWriteLock(&afs_xvcache, 138);
if (adp->f.states & CForeign)
finalZaps = afs_allZaps; /* do this before calling newvcache */
else
finalZaps = afs_evenZaps; /* do this before calling newvcache */
/* don't need to call RemoveVCB, since only path leaving a callback is the
* one where we pass through afs_NewVCache. Can't have queued a VCB unless
* we created and freed an entry between file creation time and here, and the
* freeing of the vnode will change evenZaps. Don't need to update the VLRU
* queue, since the find will only succeed in the event of a create race, and
* then the vcache will be at the front of the VLRU queue anyway... */
if (!(tvc = afs_FindVCache(&newFid, 0, DO_STATS))) {
tvc = afs_NewVCache(&newFid, hostp);
if (tvc) {
int finalCBs;
ObtainWriteLock(&tvc->lock, 139);
ObtainWriteLock(&afs_xcbhash, 489);
finalCBs = afs_evenCBs;
/* add the callback in */
if (adp->f.states & CForeign) {
tvc->f.states |= CForeign;
finalCBs = afs_allCBs;
}
if (origCBs == finalCBs && origZaps == finalZaps) {
tvc->f.states |= CStatd; /* we've fake entire thing, so don't stat */
tvc->f.states &= ~CBulkFetching;
if (!AFS_IS_DISCON_RW) {
tvc->cbExpires = CallBack.ExpirationTime;
afs_QueueCallback(tvc, CBHash(CallBack.ExpirationTime), volp);
}
} else {
afs_DequeueCallback(tvc);
tvc->f.states &= ~(CStatd | CUnique);
tvc->callback = 0;
if (tvc->f.fid.Fid.Vnode & 1 || (vType(tvc) == VDIR))
osi_dnlc_purgedp(tvc);
}
ReleaseWriteLock(&afs_xcbhash);
if (AFS_IS_DISCON_RW) {
afs_DisconAddDirty(tvc, VDisconCreate, 0);
afs_GenDisconStatus(adp, tvc, &newFid, attrs, treq, VREG);
} else {
afs_ProcessFS(tvc, OutFidStatus, treq);
}
tvc->f.parent.vnode = adp->f.fid.Fid.Vnode;
tvc->f.parent.unique = adp->f.fid.Fid.Unique;
#if !defined(UKERNEL)
if (volp && (volp->states & VPartVisible))
tvc->f.states |= CPartVisible;
#endif
ReleaseWriteLock(&tvc->lock);
*avcp = tvc;
code = 0;
} else
code = ENOENT;
} else {
/* otherwise cache entry already exists, someone else must
* have created it. Comments used to say: "don't need write
* lock to *clear* these flags" but we should do it anyway.
* Code used to clear stat bit and callback, but I don't see
* the point -- we didn't have a create race, somebody else just
* snuck into NewVCache before we got here, probably a racing
* lookup.
*/
*avcp = tvc;
code = 0;
}
ReleaseWriteLock(&afs_xvcache);
done:
AFS_DISCON_UNLOCK();
done3:
if (volp)
afs_PutVolume(volp, READ_LOCK);
if (code == 0) {
if (afs_mariner)
afs_AddMarinerName(aname, *avcp);
/* return the new status in vattr */
afs_CopyOutAttrs(*avcp, attrs);
if (afs_mariner)
afs_MarinerLog("store$Creating", *avcp);
}
afs_PutFakeStat(&fakestate);
code = afs_CheckCode(code, treq, 20);
afs_DestroyReq(treq);
done2:
osi_FreeSmallSpace(OutFidStatus);
osi_FreeSmallSpace(OutDirStatus);
return code;
}
/*
* Check to see if we can track the change locally: requires that
* we have sufficiently recent info in data cache. If so, we
* know the new DataVersion number, and place it correctly in both the
* data and stat cache entries. This routine returns 1 if we should
* do the operation locally, and 0 otherwise.
*
* This routine must be called with the stat cache entry write-locked,
* and dcache entry write-locked.
*/
int
afs_LocalHero(struct vcache *avc, struct dcache *adc,
AFSFetchStatus * astat, int aincr)
{
afs_int32 ok;
afs_hyper_t avers;
AFS_STATCNT(afs_LocalHero);
hset64(avers, astat->dataVersionHigh, astat->DataVersion);
/* avers *is* the version number now, no matter what */
if (adc) {
/* does what's in the dcache *now* match what's in the vcache *now*,
* and do we have a valid callback? if not, our local copy is not "ok" */
ok = (hsame(avc->f.m.DataVersion, adc->f.versionNo) && avc->callback
&& (avc->f.states & CStatd) && avc->cbExpires >= osi_Time());
} else {
ok = 0;
}
if (ok) {
/* check that the DV on the server is what we expect it to be */
afs_hyper_t newDV;
hset(newDV, adc->f.versionNo);
hadd32(newDV, aincr);
if (!hsame(avers, newDV)) {
ok = 0;
}
}
#if defined(AFS_SGI_ENV)
osi_Assert(avc->v.v_type == VDIR);
#endif
/* The bulk status code used the length as a sequence number. */
/* Don't update the vcache entry unless the stats are current. */
if (avc->f.states & CStatd) {
hset(avc->f.m.DataVersion, avers);
#ifdef AFS_64BIT_CLIENT
FillInt64(avc->f.m.Length, astat->Length_hi, astat->Length);
#else /* AFS_64BIT_CLIENT */
avc->f.m.Length = astat->Length;
#endif /* AFS_64BIT_CLIENT */
avc->f.m.Date = astat->ClientModTime;
}
if (ok) {
/* we've been tracking things correctly */
adc->dflags |= DFEntryMod;
adc->f.versionNo = avers;
return 1;
} else {
if (adc) {
ZapDCE(adc);
DZap(adc);
}
if (avc->f.states & CStatd) {
osi_dnlc_purgedp(avc);
}
return 0;
}
}
afs_open(struct vcache **avcp, afs_int32 aflags, afs_ucred_t *acred)
#endif
{
afs_int32 code;
struct vrequest treq;
struct vcache *tvc;
int writing;
struct afs_fakestat_state fakestate;
AFS_STATCNT(afs_open);
if ((code = afs_InitReq(&treq, acred)))
return code;
#ifdef AFS_SGI64_ENV
/* avcpp can be, but is not necesarily, bhp's vnode. */
tvc = VTOAFS(BHV_TO_VNODE(bhv));
#else
tvc = *avcp;
#endif
afs_Trace2(afs_iclSetp, CM_TRACE_OPEN, ICL_TYPE_POINTER, tvc,
ICL_TYPE_INT32, aflags);
afs_InitFakeStat(&fakestate);
AFS_DISCON_LOCK();
code = afs_EvalFakeStat(&tvc, &fakestate, &treq);
if (code)
goto done;
code = afs_VerifyVCache(tvc, &treq);
if (code)
goto done;
ObtainReadLock(&tvc->lock);
if (AFS_IS_DISCONNECTED && (afs_DCacheMissingChunks(tvc) != 0)) {
ReleaseReadLock(&tvc->lock);
/* printf("Network is down in afs_open: missing chunks\n"); */
code = ENETDOWN;
goto done;
}
ReleaseReadLock(&tvc->lock);
if (aflags & (FWRITE | FTRUNC))
writing = 1;
else
writing = 0;
if (vType(tvc) == VDIR) {
/* directory */
if (writing) {
code = EISDIR;
goto done;
} else {
if (!afs_AccessOK
(tvc, ((tvc->f.states & CForeign) ? PRSFS_READ : PRSFS_LOOKUP),
&treq, CHECK_MODE_BITS)) {
code = EACCES;
/* printf("afs_Open: no access for dir\n"); */
goto done;
}
}
} else {
#ifdef AFS_SUN5_ENV
if (AFS_NFSXLATORREQ(acred) && (aflags & FREAD)) {
if (!afs_AccessOK
(tvc, PRSFS_READ, &treq,
CHECK_MODE_BITS | CMB_ALLOW_EXEC_AS_READ)) {
code = EACCES;
goto done;
}
}
#endif
#ifdef AFS_AIX41_ENV
if (aflags & FRSHARE) {
/*
* Hack for AIX 4.1:
* Apparently it is possible for a file to get mapped without
* either VNOP_MAP or VNOP_RDWR being called, if (1) it is a
* sharable library, and (2) it has already been loaded. We must
* ensure that the credp is up to date. We detect the situation
* by checking for O_RSHARE at open time.
*/
/*
* We keep the caller's credentials since an async daemon will
* handle the request at some point. We assume that the same
* credentials will be used.
*/
ObtainWriteLock(&tvc->lock, 140);
if (!tvc->credp || (tvc->credp != acred)) {
crhold(acred);
if (tvc->credp) {
struct ucred *crp = tvc->credp;
tvc->credp = NULL;
crfree(crp);
}
tvc->credp = acred;
}
ReleaseWriteLock(&tvc->lock);
}
#endif
/* normal file or symlink */
osi_FlushText(tvc); /* only needed to flush text if text locked last time */
#ifdef AFS_BOZONLOCK_ENV
afs_BozonLock(&tvc->pvnLock, tvc);
#endif
osi_FlushPages(tvc, acred);
#ifdef AFS_BOZONLOCK_ENV
afs_BozonUnlock(&tvc->pvnLock, tvc);
#endif
}
/* set date on file if open in O_TRUNC mode */
if (aflags & FTRUNC) {
/* this fixes touch */
ObtainWriteLock(&tvc->lock, 123);
tvc->f.m.Date = osi_Time();
tvc->f.states |= CDirty;
ReleaseWriteLock(&tvc->lock);
}
ObtainReadLock(&tvc->lock);
if (writing)
tvc->execsOrWriters++;
tvc->opens++;
#if defined(AFS_SGI_ENV) || defined (AFS_LINUX26_ENV)
if (writing && tvc->cred == NULL) {
crhold(acred);
tvc->cred = acred;
}
#endif
ReleaseReadLock(&tvc->lock);
if ((afs_preCache != 0) && (writing == 0) && (vType(tvc) != VDIR) &&
(!afs_BBusy())) {
struct dcache *tdc;
afs_size_t offset, len;
tdc = afs_GetDCache(tvc, 0, &treq, &offset, &len, 1);
ObtainSharedLock(&tdc->mflock, 865);
if (!(tdc->mflags & DFFetchReq)) {
struct brequest *bp;
/* start the daemon (may already be running, however) */
UpgradeSToWLock(&tdc->mflock, 666);
tdc->mflags |= DFFetchReq; /* guaranteed to be cleared by BKG or
GetDCache */
/* last parm (1) tells bkg daemon to do an afs_PutDCache when it
is done, since we don't want to wait for it to finish before
doing so ourselves.
*/
bp = afs_BQueue(BOP_FETCH, tvc, B_DONTWAIT, 0, acred,
(afs_size_t) 0, (afs_size_t) 1, tdc,
(void *)0, (void *)0);
if (!bp) {
tdc->mflags &= ~DFFetchReq;
}
ReleaseWriteLock(&tdc->mflock);
} else {
ReleaseSharedLock(&tdc->mflock);
}
}
done:
afs_PutFakeStat(&fakestate);
AFS_DISCON_UNLOCK();
code = afs_CheckCode(code, &treq, 4); /* avoid AIX -O bug */
afs_Trace2(afs_iclSetp, CM_TRACE_OPEN, ICL_TYPE_POINTER, tvc,
ICL_TYPE_INT32, 999999);
return code;
}
/* Note that we don't set CDirty here, this is OK because the unlink
* RPC is called synchronously */
int
afs_remove(OSI_VC_DECL(adp), char *aname, afs_ucred_t *acred)
{
struct vrequest treq;
register struct dcache *tdc;
struct VenusFid unlinkFid;
register afs_int32 code;
register struct vcache *tvc;
afs_size_t offset, len;
struct afs_fakestat_state fakestate;
OSI_VC_CONVERT(adp);
AFS_STATCNT(afs_remove);
afs_Trace2(afs_iclSetp, CM_TRACE_REMOVE, ICL_TYPE_POINTER, adp,
ICL_TYPE_STRING, aname);
if ((code = afs_InitReq(&treq, acred))) {
return code;
}
afs_InitFakeStat(&fakestate);
AFS_DISCON_LOCK();
code = afs_EvalFakeStat(&adp, &fakestate, &treq);
if (code)
goto done;
/* Check if this is dynroot */
if (afs_IsDynroot(adp)) {
code = afs_DynrootVOPRemove(adp, acred, aname);
goto done;
}
if (afs_IsDynrootMount(adp)) {
code = ENOENT;
goto done;
}
if (strlen(aname) > AFSNAMEMAX) {
code = ENAMETOOLONG;
goto done;
}
tagain:
code = afs_VerifyVCache(adp, &treq);
tvc = NULL;
if (code) {
code = afs_CheckCode(code, &treq, 23);
goto done;
}
/** If the volume is read-only, return error without making an RPC to the
* fileserver
*/
if (adp->f.states & CRO) {
code = EROFS;
goto done;
}
/* If we're running disconnected without logging, go no further... */
if (AFS_IS_DISCONNECTED && !AFS_IS_DISCON_RW) {
code = ENETDOWN;
goto done;
}
tdc = afs_GetDCache(adp, (afs_size_t) 0, &treq, &offset, &len, 1); /* test for error below */
ObtainWriteLock(&adp->lock, 142);
if (tdc)
ObtainSharedLock(&tdc->lock, 638);
/*
* Make sure that the data in the cache is current. We may have
* received a callback while we were waiting for the write lock.
*/
if (!(adp->f.states & CStatd)
|| (tdc && !hsame(adp->f.m.DataVersion, tdc->f.versionNo))) {
ReleaseWriteLock(&adp->lock);
if (tdc) {
ReleaseSharedLock(&tdc->lock);
afs_PutDCache(tdc);
}
goto tagain;
}
unlinkFid.Fid.Vnode = 0;
if (!tvc) {
tvc = osi_dnlc_lookup(adp, aname, WRITE_LOCK);
}
/* This should not be necessary since afs_lookup() has already
* done the work.
*/
if (!tvc)
if (tdc) {
code = afs_dir_Lookup(tdc, aname, &unlinkFid.Fid);
if (code == 0) {
afs_int32 cached = 0;
unlinkFid.Cell = adp->f.fid.Cell;
unlinkFid.Fid.Volume = adp->f.fid.Fid.Volume;
if (unlinkFid.Fid.Unique == 0) {
tvc =
afs_LookupVCache(&unlinkFid, &treq, &cached, adp,
aname);
} else {
ObtainReadLock(&afs_xvcache);
tvc = afs_FindVCache(&unlinkFid, 0, DO_STATS);
ReleaseReadLock(&afs_xvcache);
}
}
}
if (AFS_IS_DISCON_RW) {
if (!adp->f.shadow.vnode && !(adp->f.ddirty_flags & VDisconCreate)) {
/* Make shadow copy of parent dir. */
afs_MakeShadowDir(adp, tdc);
}
/* Can't hold a dcache lock whilst we're getting a vcache one */
if (tdc)
ReleaseSharedLock(&tdc->lock);
/* XXX - We're holding adp->lock still, and we've got no
* guarantee about whether the ordering matches the lock hierarchy */
ObtainWriteLock(&tvc->lock, 713);
/* If we were locally created, then we don't need to do very
* much beyond ensuring that we don't exist anymore */
if (tvc->f.ddirty_flags & VDisconCreate) {
afs_DisconRemoveDirty(tvc);
} else {
/* Add removed file vcache to dirty list. */
afs_DisconAddDirty(tvc, VDisconRemove, 1);
}
adp->f.m.LinkCount--;
ReleaseWriteLock(&tvc->lock);
if (tdc)
ObtainSharedLock(&tdc->lock, 714);
}
if (tvc && osi_Active(tvc)) {
/* about to delete whole file, prefetch it first */
ReleaseWriteLock(&adp->lock);
if (tdc)
ReleaseSharedLock(&tdc->lock);
ObtainWriteLock(&tvc->lock, 143);
FetchWholeEnchilada(tvc, &treq);
ReleaseWriteLock(&tvc->lock);
ObtainWriteLock(&adp->lock, 144);
/* Technically I don't think we need this back, but let's hold it
anyway; The "got" reference should actually be sufficient. */
if (tdc)
ObtainSharedLock(&tdc->lock, 640);
}
osi_dnlc_remove(adp, aname, tvc);
Tadp1 = adp;
#ifndef AFS_DARWIN80_ENV
Tadpr = VREFCOUNT(adp);
#endif
Ttvc = tvc;
Tnam = aname;
Tnam1 = 0;
#ifndef AFS_DARWIN80_ENV
if (tvc)
Ttvcr = VREFCOUNT(tvc);
#endif
#ifdef AFS_AIX_ENV
if (tvc && VREFCOUNT_GT(tvc, 2) && tvc->opens > 0
&& !(tvc->f.states & CUnlinked)) {
#else
if (tvc && VREFCOUNT_GT(tvc, 1) && tvc->opens > 0
&& !(tvc->f.states & CUnlinked)) {
#endif
char *unlname = afs_newname();
ReleaseWriteLock(&adp->lock);
if (tdc)
ReleaseSharedLock(&tdc->lock);
code = afsrename(adp, aname, adp, unlname, acred, &treq);
Tnam1 = unlname;
if (!code) {
struct VenusFid *oldmvid = NULL;
if (tvc->mvid)
oldmvid = tvc->mvid;
tvc->mvid = (struct VenusFid *)unlname;
if (oldmvid)
osi_FreeSmallSpace(oldmvid);
crhold(acred);
if (tvc->uncred) {
crfree(tvc->uncred);
}
tvc->uncred = acred;
tvc->f.states |= CUnlinked;
/* if rename succeeded, remove should not */
ObtainWriteLock(&tvc->lock, 715);
if (tvc->f.ddirty_flags & VDisconRemove) {
tvc->f.ddirty_flags &= ~VDisconRemove;
}
ReleaseWriteLock(&tvc->lock);
} else {
osi_FreeSmallSpace(unlname);
}
if (tdc)
afs_PutDCache(tdc);
afs_PutVCache(tvc);
} else {
code = afsremove(adp, tdc, tvc, aname, acred, &treq);
}
done:
afs_PutFakeStat(&fakestate);
#ifndef AFS_DARWIN80_ENV
/* we can't track by thread, it's not exported in the KPI; only do
this on !macos */
osi_Assert(!WriteLocked(&adp->lock) || (adp->lock.pid_writer != MyPidxx));
#endif
AFS_DISCON_UNLOCK();
return code;
}
/* afs_remunlink -- This tries to delete the file at the server after it has
* been renamed when unlinked locally but now has been finally released.
*
* CAUTION -- may be called with avc unheld. */
int
afs_remunlink(register struct vcache *avc, register int doit)
{
afs_ucred_t *cred;
char *unlname;
struct vcache *adp;
struct vrequest treq;
struct VenusFid dirFid;
register struct dcache *tdc;
afs_int32 code = 0;
if (NBObtainWriteLock(&avc->lock, 423))
return 0;
#if defined(AFS_DARWIN80_ENV)
if (vnode_get(AFSTOV(avc))) {
ReleaseWriteLock(&avc->lock);
return 0;
}
#endif
if (avc->mvid && (doit || (avc->f.states & CUnlinkedDel))) {
if ((code = afs_InitReq(&treq, avc->uncred))) {
ReleaseWriteLock(&avc->lock);
} else {
/* Must bump the refCount because GetVCache may block.
* Also clear mvid so no other thread comes here if we block.
*/
unlname = (char *)avc->mvid;
avc->mvid = NULL;
cred = avc->uncred;
avc->uncred = NULL;
#if defined(AFS_DARWIN_ENV) && !defined(AFS_DARWIN80_ENV)
VREF(AFSTOV(avc));
#else
AFS_FAST_HOLD(avc);
#endif
/* We'll only try this once. If it fails, just release the vnode.
* Clear after doing hold so that NewVCache doesn't find us yet.
*/
avc->f.states &= ~(CUnlinked | CUnlinkedDel);
ReleaseWriteLock(&avc->lock);
dirFid.Cell = avc->f.fid.Cell;
dirFid.Fid.Volume = avc->f.fid.Fid.Volume;
dirFid.Fid.Vnode = avc->f.parent.vnode;
dirFid.Fid.Unique = avc->f.parent.unique;
adp = afs_GetVCache(&dirFid, &treq, NULL, NULL);
if (adp) {
tdc = afs_FindDCache(adp, (afs_size_t) 0);
ObtainWriteLock(&adp->lock, 159);
if (tdc)
ObtainSharedLock(&tdc->lock, 639);
/* afsremove releases the adp & tdc locks, and does vn_rele(avc) */
code = afsremove(adp, tdc, avc, unlname, cred, &treq);
afs_PutVCache(adp);
} else {
/* we failed - and won't be back to try again. */
afs_PutVCache(avc);
}
osi_FreeSmallSpace(unlname);
crfree(cred);
}
} else {
#if defined(AFS_DARWIN80_ENV)
vnode_put(AFSTOV(avc));
#endif
ReleaseWriteLock(&avc->lock);
}
return code;
}
static int afs_export_get_name(struct dentry *parent, char *name,
struct dentry *child)
{
struct afs_fakestat_state fakestate;
struct get_name_data data;
struct vrequest treq;
struct volume *tvp;
struct vcache *vcp;
struct dcache *tdc;
cred_t *credp;
afs_size_t dirOffset, dirLen;
afs_int32 code = 0;
if (!parent->d_inode) {
#ifdef OSI_EXPORT_DEBUG
/* can't lookup name in a negative dentry */
printk("afs: get_name(%s, %s): no parent inode\n",
parent->d_name.name ? (char *)parent->d_name.name : "?",
child->d_name.name ? (char *)child->d_name.name : "?");
#endif
return -EIO;
}
if (!child->d_inode) {
#ifdef OSI_EXPORT_DEBUG
/* can't find the FID of negative dentry */
printk("afs: get_name(%s, %s): no child inode\n",
parent->d_name.name ? (char *)parent->d_name.name : "?",
child->d_name.name ? (char *)child->d_name.name : "?");
#endif
return -ENOENT;
}
afs_InitFakeStat(&fakestate);
credp = crref();
AFS_GLOCK();
vcp = VTOAFS(child->d_inode);
/* special case dynamic mount directory */
if (afs_IsDynrootMount(vcp)) {
#ifdef OSI_EXPORT_DEBUG
printk("afs: get_name(%s, 0x%08x/%d/%d.%d): this is the dynmount dir\n",
parent->d_name.name ? (char *)parent->d_name.name : "?",
vcp->f.fid.Cell, vcp->f.fid.Fid.Volume,
vcp->f.fid.Fid.Vnode, vcp->f.fid.Fid.Unique);
#endif
data.fid = vcp->f.fid;
if (VTOAFS(parent->d_inode) == afs_globalVp)
strcpy(name, AFS_DYNROOT_MOUNTNAME);
else
code = -ENOENT;
goto done;
}
/* Figure out what FID to look for */
if (vcp->mvstat == 2) { /* volume root */
tvp = afs_GetVolume(&vcp->f.fid, 0, READ_LOCK);
if (!tvp) {
#ifdef OSI_EXPORT_DEBUG
printk("afs: get_name(%s, 0x%08x/%d/%d.%d): no volume for root\n",
parent->d_name.name ? (char *)parent->d_name.name : "?",
vcp->f.fid.Cell, vcp->f.fid.Fid.Volume,
vcp->f.fid.Fid.Vnode, vcp->f.fid.Fid.Unique);
#endif
code = ENOENT;
goto done;
}
data.fid = tvp->mtpoint;
afs_PutVolume(tvp, READ_LOCK);
} else {
data.fid = vcp->f.fid;
}
vcp = VTOAFS(parent->d_inode);
#ifdef OSI_EXPORT_DEBUG
printk("afs: get_name(%s, 0x%08x/%d/%d.%d): parent is 0x%08x/%d/%d.%d\n",
parent->d_name.name ? (char *)parent->d_name.name : "?",
data.fid.Cell, data.fid.Fid.Volume,
data.fid.Fid.Vnode, data.fid.Fid.Unique,
vcp->f.fid.Cell, vcp->f.fid.Fid.Volume,
vcp->f.fid.Fid.Vnode, vcp->f.fid.Fid.Unique);
#endif
code = afs_InitReq(&treq, credp);
if (code) {
#ifdef OSI_EXPORT_DEBUG
printk("afs: get_name(%s, 0x%08x/%d/%d.%d): afs_InitReq: %d\n",
parent->d_name.name ? (char *)parent->d_name.name : "?",
data.fid.Cell, data.fid.Fid.Volume,
data.fid.Fid.Vnode, data.fid.Fid.Unique, code);
#endif
goto done;
}
/* a dynamic mount point in the dynamic mount directory */
if (afs_IsDynrootMount(vcp) && afs_IsDynrootAnyFid(&data.fid)
&& VNUM_TO_VNTYPE(data.fid.Fid.Vnode) == VN_TYPE_MOUNT) {
#ifdef OSI_EXPORT_DEBUG
printk("afs: get_name(%s, 0x%08x/%d/%d.%d): dynamic mount point\n",
parent->d_name.name ? (char *)parent->d_name.name : "?",
data.fid.Cell, data.fid.Fid.Volume,
data.fid.Fid.Vnode, data.fid.Fid.Unique);
#endif
vcp = afs_GetVCache(&data.fid, &treq, NULL, NULL);
if (vcp) {
ObtainReadLock(&vcp->lock);
if (strlen(vcp->linkData + 1) <= NAME_MAX)
strcpy(name, vcp->linkData + 1);
else
code = ENOENT;
ReleaseReadLock(&vcp->lock);
afs_PutVCache(vcp);
} else {
#ifdef OSI_EXPORT_DEBUG
printk("afs: get_name(%s, 0x%08x/%d/%d.%d): no vcache\n",
parent->d_name.name ? (char *)parent->d_name.name : "?",
data.fid.Cell, data.fid.Fid.Volume,
data.fid.Fid.Vnode, data.fid.Fid.Unique);
#endif
code = ENOENT;
}
goto done;
}
code = afs_EvalFakeStat(&vcp, &fakestate, &treq);
if (code)
goto done;
if (vcp->f.fid.Cell != data.fid.Cell ||
vcp->f.fid.Fid.Volume != data.fid.Fid.Volume) {
/* parent is not the expected cell and volume; thus it
* cannot possibly contain the fid we are looking for */
#ifdef OSI_EXPORT_DEBUG
printk("afs: get_name(%s, 0x%08x/%d/%d.%d): wrong parent 0x%08x/%d\n",
parent->d_name.name ? (char *)parent->d_name.name : "?",
data.fid.Cell, data.fid.Fid.Volume,
data.fid.Fid.Vnode, data.fid.Fid.Unique,
vcp->f.fid.Cell, vcp->f.fid.Fid.Volume);
#endif
code = ENOENT;
goto done;
}
redo:
if (!(vcp->f.states & CStatd)) {
if ((code = afs_VerifyVCache2(vcp, &treq))) {
#ifdef OSI_EXPORT_DEBUG
printk("afs: get_name(%s, 0x%08x/%d/%d.%d): VerifyVCache2(0x%08x/%d/%d.%d): %d\n",
parent->d_name.name ? (char *)parent->d_name.name : "?",
data.fid.Cell, data.fid.Fid.Volume,
data.fid.Fid.Vnode, data.fid.Fid.Unique,
vcp->f.fid.Cell, vcp->f.fid.Fid.Volume,
vcp->f.fid.Fid.Vnode, vcp->f.fid.Fid.Unique, code);
#endif
goto done;
}
}
tdc = afs_GetDCache(vcp, (afs_size_t) 0, &treq, &dirOffset, &dirLen, 1);
if (!tdc) {
#ifdef OSI_EXPORT_DEBUG
printk("afs: get_name(%s, 0x%08x/%d/%d.%d): GetDCache(0x%08x/%d/%d.%d): %d\n",
parent->d_name.name ? (char *)parent->d_name.name : "?",
data.fid.Cell, data.fid.Fid.Volume,
data.fid.Fid.Vnode, data.fid.Fid.Unique,
vcp->f.fid.Cell, vcp->f.fid.Fid.Volume,
vcp->f.fid.Fid.Vnode, vcp->f.fid.Fid.Unique, code);
#endif
code = EIO;
goto done;
}
ObtainReadLock(&vcp->lock);
ObtainReadLock(&tdc->lock);
/*
* Make sure that the data in the cache is current. There are two
* cases we need to worry about:
* 1. The cache data is being fetched by another process.
* 2. The cache data is no longer valid
*/
while ((vcp->f.states & CStatd)
&& (tdc->dflags & DFFetching)
&& hsame(vcp->f.m.DataVersion, tdc->f.versionNo)) {
ReleaseReadLock(&tdc->lock);
ReleaseReadLock(&vcp->lock);
afs_osi_Sleep(&tdc->validPos);
ObtainReadLock(&vcp->lock);
ObtainReadLock(&tdc->lock);
}
if (!(vcp->f.states & CStatd)
|| !hsame(vcp->f.m.DataVersion, tdc->f.versionNo)) {
ReleaseReadLock(&tdc->lock);
ReleaseReadLock(&vcp->lock);
afs_PutDCache(tdc);
#ifdef OSI_EXPORT_DEBUG
printk("afs: get_name(%s, 0x%08x/%d/%d.%d): dir (0x%08x/%d/%d.%d) changed; retrying\n",
parent->d_name.name ? (char *)parent->d_name.name : "?",
data.fid.Cell, data.fid.Fid.Volume,
data.fid.Fid.Vnode, data.fid.Fid.Unique,
vcp->f.fid.Cell, vcp->f.fid.Fid.Volume,
vcp->f.fid.Fid.Vnode, vcp->f.fid.Fid.Unique);
#endif
goto redo;
}
data.name = name;
data.found = 0;
code = afs_dir_EnumerateDir(tdc, get_name_hook, &data);
if (!code && !data.found) {
#ifdef OSI_EXPORT_DEBUG
printk("afs: get_name(%s, 0x%08x/%d/%d.%d): not found\n",
parent->d_name.name ? (char *)parent->d_name.name : "?",
data.fid.Cell, data.fid.Fid.Volume,
data.fid.Fid.Vnode, data.fid.Fid.Unique);
#endif
code = ENOENT;
} else if (code) {
#ifdef OSI_EXPORT_DEBUG
printk("afs: get_name(%s, 0x%08x/%d/%d.%d): Enumeratedir(0x%08x/%d/%d.%d): %d\n",
parent->d_name.name ? (char *)parent->d_name.name : "?",
data.fid.Cell, data.fid.Fid.Volume,
data.fid.Fid.Vnode, data.fid.Fid.Unique,
vcp->f.fid.Cell, vcp->f.fid.Fid.Volume,
vcp->f.fid.Fid.Vnode, vcp->f.fid.Fid.Unique, code);
#endif
}
ReleaseReadLock(&tdc->lock);
ReleaseReadLock(&vcp->lock);
afs_PutDCache(tdc);
done:
if (!code) {
printk("afs: get_name(%s, 0x%08x/%d/%d.%d) => %s\n",
parent->d_name.name ? (char *)parent->d_name.name : "?",
data.fid.Cell, data.fid.Fid.Volume,
data.fid.Fid.Vnode, data.fid.Fid.Unique, name);
}
afs_PutFakeStat(&fakestate);
AFS_GUNLOCK();
crfree(credp);
code = afs_CheckCode(code, &treq, 102);
return -code;
}
/* don't set CDirty in here because RPC is called synchronously */
int
afs_symlink(OSI_VC_DECL(adp), char *aname, struct vattr *attrs,
char *atargetName, struct vcache **tvcp, afs_ucred_t *acred)
{
afs_uint32 now = 0;
struct vrequest *treq = NULL;
afs_int32 code = 0;
struct afs_conn *tc;
struct VenusFid newFid;
struct dcache *tdc;
afs_size_t offset, len;
afs_int32 alen;
struct server *hostp = 0;
struct vcache *tvc;
struct AFSStoreStatus InStatus;
struct AFSFetchStatus *OutFidStatus, *OutDirStatus;
struct AFSCallBack CallBack;
struct AFSVolSync tsync;
struct volume *volp = 0;
struct afs_fakestat_state fakestate;
struct rx_connection *rxconn;
XSTATS_DECLS;
OSI_VC_CONVERT(adp);
AFS_STATCNT(afs_symlink);
afs_Trace2(afs_iclSetp, CM_TRACE_SYMLINK, ICL_TYPE_POINTER, adp,
ICL_TYPE_STRING, aname);
OutFidStatus = osi_AllocSmallSpace(sizeof(struct AFSFetchStatus));
OutDirStatus = osi_AllocSmallSpace(sizeof(struct AFSFetchStatus));
memset(&InStatus, 0, sizeof(InStatus));
if ((code = afs_CreateReq(&treq, acred)))
goto done2;
afs_InitFakeStat(&fakestate);
AFS_DISCON_LOCK();
code = afs_EvalFakeStat(&adp, &fakestate, treq);
if (code)
goto done;
if (strlen(aname) > AFSNAMEMAX || strlen(atargetName) > AFSPATHMAX) {
code = ENAMETOOLONG;
goto done;
}
if (afs_IsDynroot(adp)) {
code = afs_DynrootVOPSymlink(adp, acred, aname, atargetName);
goto done;
}
if (afs_IsDynrootMount(adp)) {
code = EROFS;
goto done;
}
code = afs_VerifyVCache(adp, treq);
if (code) {
code = afs_CheckCode(code, treq, 30);
goto done;
}
/** If the volume is read-only, return error without making an RPC to the
* fileserver
*/
if (adp->f.states & CRO) {
code = EROFS;
goto done;
}
if (AFS_IS_DISCONNECTED && !AFS_IS_DISCON_RW) {
code = ENETDOWN;
goto done;
}
InStatus.Mask = AFS_SETMODTIME | AFS_SETMODE;
InStatus.ClientModTime = osi_Time();
alen = strlen(atargetName); /* we want it to include the null */
if ( (*atargetName == '#' || *atargetName == '%') && alen > 1 && atargetName[alen-1] == '.') {
InStatus.UnixModeBits = 0644; /* mt pt: null from "." at end */
if (alen == 1)
alen++; /* Empty string */
} else {
InStatus.UnixModeBits = 0755;
alen++; /* add in the null */
}
tdc = afs_GetDCache(adp, (afs_size_t) 0, treq, &offset, &len, 1);
volp = afs_FindVolume(&adp->f.fid, READ_LOCK); /*parent is also in same vol */
ObtainWriteLock(&adp->lock, 156);
if (tdc)
ObtainWriteLock(&tdc->lock, 636);
/* No further locks: if the SymLink succeeds, it does not matter what happens
* to our local copy of the directory. If somebody tampers with it in the meantime,
* the copy will be invalidated */
if (!AFS_IS_DISCON_RW) {
do {
tc = afs_Conn(&adp->f.fid, treq, SHARED_LOCK, &rxconn);
if (tc) {
hostp = tc->parent->srvr->server;
XSTATS_START_TIME(AFS_STATS_FS_RPCIDX_SYMLINK);
if (adp->f.states & CForeign) {
now = osi_Time();
RX_AFS_GUNLOCK();
code =
RXAFS_DFSSymlink(rxconn,
(struct AFSFid *)&adp->f.fid.Fid,
aname, atargetName, &InStatus,
(struct AFSFid *)&newFid.Fid,
OutFidStatus, OutDirStatus,
&CallBack, &tsync);
RX_AFS_GLOCK();
} else {
RX_AFS_GUNLOCK();
code =
RXAFS_Symlink(rxconn, (struct AFSFid *)&adp->f.fid.Fid,
aname, atargetName, &InStatus,
(struct AFSFid *)&newFid.Fid,
OutFidStatus, OutDirStatus, &tsync);
RX_AFS_GLOCK();
}
XSTATS_END_TIME;
} else
code = -1;
} while (afs_Analyze
(tc, rxconn, code, &adp->f.fid, treq, AFS_STATS_FS_RPCIDX_SYMLINK,
SHARED_LOCK, NULL));
} else {
newFid.Cell = adp->f.fid.Cell;
newFid.Fid.Volume = adp->f.fid.Fid.Volume;
afs_GenFakeFid(&newFid, VREG, 0);
}
ObtainWriteLock(&afs_xvcache, 40);
if (code) {
if (code < 0) {
afs_StaleVCache(adp);
}
ReleaseWriteLock(&adp->lock);
ReleaseWriteLock(&afs_xvcache);
if (tdc) {
ReleaseWriteLock(&tdc->lock);
afs_PutDCache(tdc);
}
goto done;
}
/* otherwise, we should see if we can make the change to the dir locally */
if (AFS_IS_DISCON_RW || afs_LocalHero(adp, tdc, OutDirStatus, 1)) {
/* we can do it locally */
ObtainWriteLock(&afs_xdcache, 293);
/* If the following fails because the name has been created in the meantime, the
* directory is out-of-date - the file server knows best! */
code = afs_dir_Create(tdc, aname, &newFid.Fid);
ReleaseWriteLock(&afs_xdcache);
if (code && !AFS_IS_DISCON_RW) {
ZapDCE(tdc); /* surprise error -- use invalid value */
DZap(tdc);
}
}
if (tdc) {
ReleaseWriteLock(&tdc->lock);
afs_PutDCache(tdc);
}
newFid.Cell = adp->f.fid.Cell;
newFid.Fid.Volume = adp->f.fid.Fid.Volume;
ReleaseWriteLock(&adp->lock);
/* now we're done with parent dir, create the link's entry. Note that
* no one can get a pointer to the new cache entry until we release
* the xvcache lock. */
tvc = afs_NewVCache(&newFid, hostp);
if (!tvc)
{
code = -2;
ReleaseWriteLock(&afs_xvcache);
goto done;
}
ObtainWriteLock(&tvc->lock, 157);
ObtainWriteLock(&afs_xcbhash, 500);
tvc->f.states |= CStatd; /* have valid info */
tvc->f.states &= ~CBulkFetching;
if (adp->f.states & CForeign) {
tvc->f.states |= CForeign;
/* We don't have to worry about losing the callback since we're doing it
* under the afs_xvcache lock actually, afs_NewVCache may drop the
* afs_xvcache lock, if it calls afs_FlushVCache */
tvc->cbExpires = CallBack.ExpirationTime + now;
afs_QueueCallback(tvc, CBHash(CallBack.ExpirationTime), volp);
} else {
tvc->cbExpires = 0x7fffffff; /* never expires, they can't change */
/* since it never expires, we don't have to queue the callback */
}
ReleaseWriteLock(&afs_xcbhash);
if (AFS_IS_DISCON_RW) {
attrs->va_mode = InStatus.UnixModeBits;
afs_GenDisconStatus(adp, tvc, &newFid, attrs, treq, VLNK);
code = afs_DisconCreateSymlink(tvc, atargetName, treq);
if (code) {
/* XXX - When this goes wrong, we need to tidy up the changes we made to
* the parent, and get rid of the vcache we just created */
ReleaseWriteLock(&tvc->lock);
ReleaseWriteLock(&afs_xvcache);
afs_PutVCache(tvc);
goto done;
}
afs_DisconAddDirty(tvc, VDisconCreate, 0);
} else {
afs_ProcessFS(tvc, OutFidStatus, treq);
}
if (!tvc->linkData) {
tvc->linkData = afs_osi_Alloc(alen);
osi_Assert(tvc->linkData != NULL);
strncpy(tvc->linkData, atargetName, alen - 1);
tvc->linkData[alen - 1] = 0;
}
ReleaseWriteLock(&tvc->lock);
ReleaseWriteLock(&afs_xvcache);
if (tvcp)
*tvcp = tvc;
else
afs_PutVCache(tvc);
code = 0;
done:
afs_PutFakeStat(&fakestate);
if (volp)
afs_PutVolume(volp, READ_LOCK);
AFS_DISCON_UNLOCK();
code = afs_CheckCode(code, treq, 31);
afs_DestroyReq(treq);
done2:
osi_FreeSmallSpace(OutFidStatus);
osi_FreeSmallSpace(OutDirStatus);
return code;
}
int
afs_getattr(OSI_VC_DECL(avc), struct vattr *attrs, afs_ucred_t *acred)
#endif
{
afs_int32 code;
struct vrequest *treq = NULL;
struct unixuser *au;
int inited = 0;
OSI_VC_CONVERT(avc);
AFS_STATCNT(afs_getattr);
afs_Trace2(afs_iclSetp, CM_TRACE_GETATTR, ICL_TYPE_POINTER, avc,
ICL_TYPE_OFFSET, ICL_HANDLE_OFFSET(avc->f.m.Length));
if (afs_fakestat_enable && avc->mvstat == AFS_MVSTAT_MTPT) {
struct afs_fakestat_state fakestat;
struct vrequest *ureq = NULL;
code = afs_CreateReq(&ureq, acred);
if (code) {
return code;
}
afs_InitFakeStat(&fakestat);
code = afs_TryEvalFakeStat(&avc, &fakestat, ureq);
if (code) {
afs_PutFakeStat(&fakestat);
afs_DestroyReq(ureq);
return code;
}
code = afs_CopyOutAttrs(avc, attrs);
afs_PutFakeStat(&fakestat);
afs_DestroyReq(ureq);
return code;
}
#if defined(AFS_SUN5_ENV)
if (flags & ATTR_HINT) {
code = afs_CopyOutAttrs(avc, attrs);
return code;
}
#endif
#if defined(AFS_DARWIN_ENV) && !defined(AFS_DARWIN80_ENV)
if (avc->f.states & CUBCinit) {
code = afs_CopyOutAttrs(avc, attrs);
return code;
}
#endif
AFS_DISCON_LOCK();
if (afs_shuttingdown != AFS_RUNNING) {
AFS_DISCON_UNLOCK();
return EIO;
}
if (!(avc->f.states & CStatd)) {
if (!(code = afs_CreateReq(&treq, acred))) {
code = afs_VerifyVCache2(avc, treq);
inited = 1;
}
} else
code = 0;
#if defined(AFS_SUN5_ENV)
if (code == 0)
osi_FlushPages(avc, acred);
#endif
if (code == 0) {
osi_FlushText(avc); /* only needed to flush text if text locked last time */
code = afs_CopyOutAttrs(avc, attrs);
if (afs_nfsexporter) {
if (!inited) {
if ((code = afs_CreateReq(&treq, acred))) {
return code;
}
inited = 1;
}
if (AFS_NFSXLATORREQ(acred)) {
if ((vType(avc) != VDIR)
&& !afs_AccessOK(avc, PRSFS_READ, treq,
CHECK_MODE_BITS |
CMB_ALLOW_EXEC_AS_READ)) {
afs_DestroyReq(treq);
return EACCES;
}
}
if ((au = afs_FindUser(treq->uid, -1, READ_LOCK))) {
struct afs_exporter *exporter = au->exporter;
if (exporter && !(afs_nfsexporter->exp_states & EXP_UNIXMODE)) {
unsigned int ubits;
/*
* If the remote user wishes to enforce default Unix mode semantics,
* like in the nfs exporter case, we OR in the user bits
* into the group and other bits. We need to do this
* because there is no RFS_ACCESS call and thus nfs
* clients implement nfs_access by interpreting the
* mode bits in the traditional way, which of course
* loses with afs.
*/
ubits = (attrs->va_mode & 0700) >> 6;
attrs->va_mode = attrs->va_mode | ubits | (ubits << 3);
/* If it's the root of AFS, replace the inode number with the
* inode number of the mounted on directory; otherwise this
* confuses getwd()... */
#ifdef AFS_LINUX22_ENV
if (avc == afs_globalVp) {
struct inode *ip = AFSTOV(avc)->i_sb->s_root->d_inode;
attrs->va_nodeid = ip->i_ino; /* VTOI()? */
}
#else
if (
#if defined(AFS_DARWIN_ENV)
vnode_isvroot(AFSTOV(avc))
#elif defined(AFS_NBSD50_ENV)
AFSTOV(avc)->v_vflag & VV_ROOT
#else
AFSTOV(avc)->v_flag & VROOT
#endif
) {
struct vnode *vp = AFSTOV(avc);
#ifdef AFS_DARWIN80_ENV
/* XXX vp = vnode_mount(vp)->mnt_vnodecovered; */
vp = 0;
#else
vp = vp->v_vfsp->vfs_vnodecovered;
if (vp) { /* Ignore weird failures */
#ifdef AFS_SGI62_ENV
attrs->va_nodeid = VnodeToIno(vp);
#else
struct inode *ip;
ip = (struct inode *)VTOI(vp);
if (ip) /* Ignore weird failures */
attrs->va_nodeid = ip->i_number;
#endif
}
#endif
}
#endif /* AFS_LINUX22_ENV */
}
afs_PutUser(au, READ_LOCK);
}
}
int afs_lockctl(struct vcache * avc, struct AFS_FLOCK * af, int acmd,
afs_ucred_t * acred)
#endif
{
struct vrequest treq;
afs_int32 code;
struct afs_fakestat_state fakestate;
AFS_STATCNT(afs_lockctl);
if ((code = afs_InitReq(&treq, acred)))
return code;
afs_InitFakeStat(&fakestate);
AFS_DISCON_LOCK();
code = afs_EvalFakeStat(&avc, &fakestate, &treq);
if (code) {
goto done;
}
#if defined(AFS_SGI_ENV)
if ((acmd == F_GETLK) || (acmd == F_RGETLK)) {
#else
if (acmd == F_GETLK) {
#endif
if (af->l_type == F_UNLCK) {
code = 0;
goto done;
}
code = HandleGetLock(avc, af, &treq, clid);
code = afs_CheckCode(code, &treq, 2); /* defeat buggy AIX optimz */
goto done;
} else if ((acmd == F_SETLK) || (acmd == F_SETLKW)
#if defined(AFS_SGI_ENV)
|| (acmd == F_RSETLK) || (acmd == F_RSETLKW)) {
#else
) {
#endif
if ((avc->f.states & CRO)) {
/* for RO volumes, don't do anything for locks; the fileserver doesn't
* even track them. A write lock should not be possible, though. */
if (af->l_type == F_WRLCK) {
code = EBADF;
} else {
code = 0;
}
goto done;
}
/* Java VMs ask for l_len=(long)-1 regardless of OS/CPU */
if ((sizeof(af->l_len) == 8) && (af->l_len == 0x7fffffffffffffffLL))
af->l_len = 0;
/* next line makes byte range locks always succeed,
* even when they should block */
if (af->l_whence != 0 || af->l_start != 0 || af->l_len != 0) {
DoLockWarning(acred);
code = 0;
goto done;
}
/* otherwise we can turn this into a whole-file flock */
if (af->l_type == F_RDLCK)
code = LOCK_SH;
else if (af->l_type == F_WRLCK)
code = LOCK_EX;
else if (af->l_type == F_UNLCK)
code = LOCK_UN;
else {
code = EINVAL; /* unknown lock type */
goto done;
}
if (((acmd == F_SETLK)
#if defined(AFS_SGI_ENV)
|| (acmd == F_RSETLK)
#endif
) && code != LOCK_UN)
code |= LOCK_NB; /* non-blocking, s.v.p. */
#if defined(AFS_DARWIN_ENV)
code = HandleFlock(avc, code, &treq, clid, 0 /*!onlymine */ );
#elif defined(AFS_SGI_ENV)
AFS_RWLOCK((vnode_t *) avc, VRWLOCK_WRITE);
code = HandleFlock(avc, code, &treq, clid, 0 /*!onlymine */ );
AFS_RWUNLOCK((vnode_t *) avc, VRWLOCK_WRITE);
#else
code = HandleFlock(avc, code, &treq, 0, 0 /*!onlymine */ );
#endif
code = afs_CheckCode(code, &treq, 3); /* defeat AIX -O bug */
goto done;
}
code = EINVAL;
done:
afs_PutFakeStat(&fakestate);
AFS_DISCON_UNLOCK();
return code;
}
/*
* Get a description of the first lock which would
* block the lock specified. If the specified lock
* would succeed, fill in the lock structure with 'F_UNLCK'.
*
* To do that, we have to ask the server for the lock
* count if:
* 1. The file is not locked by this machine.
* 2. Asking for write lock, and only the current
* PID has the file read locked.
*/
static int
HandleGetLock(struct vcache *avc, struct AFS_FLOCK *af,
struct vrequest *areq, int clid)
{
afs_int32 code;
struct AFS_FLOCK flock;
lockIdSet(&flock, NULL, clid);
ObtainWriteLock(&avc->lock, 122);
if (avc->flockCount == 0) {
/*
* We don't know ourselves, so ask the server. Unfortunately, we
* don't know the pid. Not even the server knows the pid. Besides,
* the process with the lock is on another machine
*/
code = GetFlockCount(avc, areq);
if (code == 0 || (af->l_type == F_RDLCK && code > 0)) {
af->l_type = F_UNLCK;
goto unlck_leave;
}
if (code > 0)
af->l_type = F_RDLCK;
else
af->l_type = F_WRLCK;
af->l_pid = 0;
#if defined(AFS_HAVE_FLOCK_SYSID)
af->l_sysid = 0;
#endif
goto done;
}
if (af->l_type == F_RDLCK) {
/*
* We want a read lock. If there are only
* read locks, or we are the one with the
* write lock, say it is unlocked.
*/
if (avc->flockCount > 0 || /* only read locks */
!lockIdcmp2(&flock, avc, NULL, 1, clid)) {
af->l_type = F_UNLCK;
goto unlck_leave;
}
/* one write lock, but who? */
af->l_type = F_WRLCK; /* not us, so lock would block */
if (avc->slocks) { /* we know who, so tell */
af->l_pid = avc->slocks->pid;
#if defined(AFS_HAVE_FLOCK_SYSID)
af->l_sysid = avc->slocks->sysid;
#endif
} else {
af->l_pid = 0; /* XXX can't happen?? */
#if defined(AFS_HAVE_FLOCK_SYSID)
af->l_sysid = 0;
#endif
}
goto done;
}
/*
* Ok, we want a write lock. If there is a write lock
* already, and it is not this process, we fail.
*/
if (avc->flockCount < 0) {
if (lockIdcmp2(&flock, avc, NULL, 1, clid)) {
af->l_type = F_WRLCK;
if (avc->slocks) {
af->l_pid = avc->slocks->pid;
#if defined(AFS_HAVE_FLOCK_SYSID)
af->l_sysid = avc->slocks->sysid;
#endif
} else {
af->l_pid = 0; /* XXX can't happen?? */
#if defined(AFS_HAVE_FLOCK_SYSID)
af->l_sysid = 0;
#endif
}
goto done;
}
/* we are the one with the write lock */
af->l_type = F_UNLCK;
goto unlck_leave;
}
/*
* Want a write lock, and we know there are read locks.
* If there is more than one, or it isn't us, we cannot lock.
*/
if ((avc->flockCount > 1)
|| lockIdcmp2(&flock, avc, NULL, 1, clid)) {
struct SimpleLocks *slp;
af->l_type = F_RDLCK;
af->l_pid = 0;
#if defined(AFS_HAVE_FLOCK_SYSID)
af->l_sysid = 0;
#endif
/* find a pid that isn't our own */
for (slp = avc->slocks; slp; slp = slp->next) {
if (lockIdcmp2(&flock, NULL, slp, 1, clid)) {
af->l_pid = slp->pid;
#if defined(AFS_HAVE_FLOCK_SYSID)
af->l_sysid = avc->slocks->sysid;
#endif
break;
}
}
goto done;
}
/*
* Ok, we want a write lock. If there is a write lock
* already, and it is not this process, we fail.
*/
if (avc->flockCount < 0) {
if (lockIdcmp2(&flock, avc, NULL, 1, clid)) {
af->l_type = F_WRLCK;
if (avc->slocks) {
af->l_pid = avc->slocks->pid;
#if defined(AFS_HAVE_FLOCK_SYSID)
af->l_sysid = avc->slocks->sysid;
#endif
} else {
af->l_pid = 0; /* XXX can't happen?? */
#if defined(AFS_HAVE_FLOCK_SYSID)
af->l_sysid = 0;
#endif
}
goto done;
}
/* we are the one with the write lock */
af->l_type = F_UNLCK;
goto unlck_leave;
}
/*
* Want a write lock, and we know there are read locks.
* If there is more than one, or it isn't us, we cannot lock.
*/
if ((avc->flockCount > 1)
|| lockIdcmp2(&flock, avc, NULL, 1, clid)) {
struct SimpleLocks *slp;
af->l_type = F_RDLCK;
af->l_pid = 0;
#if defined(AFS_HAVE_FLOCK_SYSID)
af->l_sysid = 0;
#endif
/* find a pid that isn't our own */
for (slp = avc->slocks; slp; slp = slp->next) {
if (lockIdcmp2(&flock, NULL, slp, 1, clid)) {
af->l_pid = slp->pid;
#if defined(AFS_HAVE_FLOCK_SYSID)
af->l_sysid = avc->slocks->sysid;
#endif
break;
}
}
goto done;
}
/*
* Want a write lock, and there is just one read lock, and it
* is this process with a read lock. Ask the server if there
* are any more processes with the file locked.
*/
code = GetFlockCount(avc, areq);
if (code == 0 || code == 1) {
af->l_type = F_UNLCK;
goto unlck_leave;
}
if (code > 0)
af->l_type = F_RDLCK;
else
af->l_type = F_WRLCK;
af->l_pid = 0;
#if defined(AFS_HAVE_FLOCK_SYSID)
af->l_sysid = 0;
#endif
done:
af->l_whence = 0;
af->l_start = 0;
af->l_len = 0; /* to end of file */
unlck_leave:
ReleaseWriteLock(&avc->lock);
return 0;
}
/* Get the 'flock' count from the server. This comes back in a 'spare'
* field from a GetStatus RPC. If we have any problems with the RPC,
* we lie and say the file is unlocked. If we ask any 'old' fileservers,
* the spare field will be a zero, saying the file is unlocked. This is
* OK, as a further 'lock' request will do the right thing.
*/
static int
GetFlockCount(struct vcache *avc, struct vrequest *areq)
{
struct afs_conn *tc;
afs_int32 code;
struct AFSFetchStatus OutStatus;
struct AFSCallBack CallBack;
struct AFSVolSync tsync;
struct rx_connection *rxconn;
int temp;
XSTATS_DECLS;
temp = areq->flags & O_NONBLOCK;
areq->flags |= O_NONBLOCK;
/* If we're disconnected, lie and say that we've got no locks. Ick */
if (AFS_IS_DISCONNECTED)
return 0;
do {
tc = afs_Conn(&avc->f.fid, areq, SHARED_LOCK, &rxconn);
if (tc) {
XSTATS_START_TIME(AFS_STATS_FS_RPCIDX_FETCHSTATUS);
RX_AFS_GUNLOCK();
code =
RXAFS_FetchStatus(rxconn, (struct AFSFid *)&avc->f.fid.Fid,
&OutStatus, &CallBack, &tsync);
RX_AFS_GLOCK();
XSTATS_END_TIME;
} else
code = -1;
} while (afs_Analyze
(tc, rxconn, code, &avc->f.fid, areq, AFS_STATS_FS_RPCIDX_FETCHSTATUS,
SHARED_LOCK, NULL));
if (temp)
areq->flags &= ~O_NONBLOCK;
if (code) {
return (0); /* failed, say it is 'unlocked' */
} else {
return ((int)OutStatus.lockCount);
}
}
afs_link(struct vcache *avc, OSI_VC_DECL(adp), char *aname,
afs_ucred_t *acred)
#endif
{
struct vrequest treq;
struct dcache *tdc;
afs_int32 code;
struct afs_conn *tc;
afs_size_t offset, len;
struct AFSFetchStatus OutFidStatus, OutDirStatus;
struct AFSVolSync tsync;
struct afs_fakestat_state vfakestate, dfakestate;
struct rx_connection *rxconn;
XSTATS_DECLS;
OSI_VC_CONVERT(adp);
AFS_STATCNT(afs_link);
afs_Trace3(afs_iclSetp, CM_TRACE_LINK, ICL_TYPE_POINTER, adp,
ICL_TYPE_POINTER, avc, ICL_TYPE_STRING, aname);
/* create a hard link; new entry is aname in dir adp */
if ((code = afs_InitReq(&treq, acred)))
goto done2;
afs_InitFakeStat(&vfakestate);
afs_InitFakeStat(&dfakestate);
AFS_DISCON_LOCK();
code = afs_EvalFakeStat(&avc, &vfakestate, &treq);
if (code)
goto done;
code = afs_EvalFakeStat(&adp, &dfakestate, &treq);
if (code)
goto done;
if (avc->f.fid.Cell != adp->f.fid.Cell
|| avc->f.fid.Fid.Volume != adp->f.fid.Fid.Volume) {
code = EXDEV;
goto done;
}
if (strlen(aname) > AFSNAMEMAX) {
code = ENAMETOOLONG;
goto done;
}
code = afs_VerifyVCache(adp, &treq);
if (code)
goto done;
/** If the volume is read-only, return error without making an RPC to the
* fileserver
*/
if (adp->f.states & CRO) {
code = EROFS;
goto done;
}
if (AFS_IS_DISCONNECTED) {
code = ENETDOWN;
goto done;
}
tdc = afs_GetDCache(adp, (afs_size_t) 0, &treq, &offset, &len, 1); /* test for error below */
ObtainWriteLock(&adp->lock, 145);
do {
tc = afs_Conn(&adp->f.fid, &treq, SHARED_LOCK, &rxconn);
if (tc) {
XSTATS_START_TIME(AFS_STATS_FS_RPCIDX_LINK);
RX_AFS_GUNLOCK();
code =
RXAFS_Link(rxconn, (struct AFSFid *)&adp->f.fid.Fid, aname,
(struct AFSFid *)&avc->f.fid.Fid, &OutFidStatus,
&OutDirStatus, &tsync);
RX_AFS_GLOCK();
XSTATS_END_TIME;
} else
code = -1;
} while (afs_Analyze
(tc, rxconn, code, &adp->f.fid, &treq, AFS_STATS_FS_RPCIDX_LINK,
SHARED_LOCK, NULL));
if (code) {
if (tdc)
afs_PutDCache(tdc);
if (code < 0) {
ObtainWriteLock(&afs_xcbhash, 492);
afs_DequeueCallback(adp);
adp->f.states &= ~CStatd;
ReleaseWriteLock(&afs_xcbhash);
osi_dnlc_purgedp(adp);
}
ReleaseWriteLock(&adp->lock);
goto done;
}
if (tdc)
ObtainWriteLock(&tdc->lock, 635);
if (afs_LocalHero(adp, tdc, &OutDirStatus, 1)) {
/* we can do it locally */
ObtainWriteLock(&afs_xdcache, 290);
code = afs_dir_Create(tdc, aname, &avc->f.fid.Fid);
ReleaseWriteLock(&afs_xdcache);
if (code) {
ZapDCE(tdc); /* surprise error -- invalid value */
DZap(tdc);
}
}
if (tdc) {
ReleaseWriteLock(&tdc->lock);
afs_PutDCache(tdc); /* drop ref count */
}
ReleaseWriteLock(&adp->lock);
ObtainWriteLock(&avc->lock, 146); /* correct link count */
/* we could lock both dir and file; since we get the new fid
* status back, you'd think we could put it in the cache status
* entry at that point. Note that if we don't lock the file over
* the rpc call, we have no guarantee that the status info
* returned in ustat is the most recent to store in the file's
* cache entry */
ObtainWriteLock(&afs_xcbhash, 493);
afs_DequeueCallback(avc);
avc->f.states &= ~CStatd; /* don't really know new link count */
ReleaseWriteLock(&afs_xcbhash);
if (avc->f.fid.Fid.Vnode & 1 || (vType(avc) == VDIR))
osi_dnlc_purgedp(avc);
ReleaseWriteLock(&avc->lock);
code = 0;
done:
code = afs_CheckCode(code, &treq, 24);
afs_PutFakeStat(&vfakestate);
afs_PutFakeStat(&dfakestate);
AFS_DISCON_UNLOCK();
done2:
return code;
}
int
afs_mkdir(OSI_VC_DECL(adp), char *aname, struct vattr *attrs,
struct vcache **avcp, afs_ucred_t *acred)
{
struct vrequest *treq = NULL;
afs_int32 code;
struct afs_conn *tc;
struct rx_connection *rxconn;
struct VenusFid newFid;
struct dcache *tdc;
struct dcache *new_dc;
afs_size_t offset, len;
struct vcache *tvc;
struct AFSStoreStatus InStatus;
struct AFSFetchStatus *OutFidStatus, *OutDirStatus;
struct AFSCallBack CallBack;
struct AFSVolSync tsync;
afs_int32 now;
struct afs_fakestat_state fakestate;
XSTATS_DECLS;
OSI_VC_CONVERT(adp);
AFS_STATCNT(afs_mkdir);
afs_Trace2(afs_iclSetp, CM_TRACE_MKDIR, ICL_TYPE_POINTER, adp,
ICL_TYPE_STRING, aname);
OutFidStatus = osi_AllocSmallSpace(sizeof(struct AFSFetchStatus));
OutDirStatus = osi_AllocSmallSpace(sizeof(struct AFSFetchStatus));
memset(&InStatus, 0, sizeof(InStatus));
if ((code = afs_CreateReq(&treq, acred)))
goto done2;
afs_InitFakeStat(&fakestate);
if (strlen(aname) > AFSNAMEMAX) {
code = ENAMETOOLONG;
goto done3;
}
if (!afs_ENameOK(aname)) {
code = EINVAL;
goto done3;
}
AFS_DISCON_LOCK();
code = afs_EvalFakeStat(&adp, &fakestate, treq);
if (code)
goto done;
code = afs_VerifyVCache(adp, treq);
if (code)
goto done;
/** If the volume is read-only, return error without making an RPC to the
* fileserver
*/
if (adp->f.states & CRO) {
code = EROFS;
goto done;
}
if (AFS_IS_DISCONNECTED && !AFS_IS_DISCON_RW) {
/*printf("Network is down in afs_mkdir\n");*/
code = ENETDOWN;
goto done;
}
InStatus.Mask = AFS_SETMODTIME | AFS_SETMODE | AFS_SETGROUP;
InStatus.ClientModTime = osi_Time();
InStatus.UnixModeBits = attrs->va_mode & 0xffff; /* only care about protection bits */
InStatus.Group = (afs_int32) afs_cr_gid(acred);
tdc = afs_GetDCache(adp, (afs_size_t) 0, treq, &offset, &len, 1);
ObtainWriteLock(&adp->lock, 153);
if (!AFS_IS_DISCON_RW) {
do {
tc = afs_Conn(&adp->f.fid, treq, SHARED_LOCK, &rxconn);
if (tc) {
XSTATS_START_TIME(AFS_STATS_FS_RPCIDX_MAKEDIR);
now = osi_Time();
RX_AFS_GUNLOCK();
code =
RXAFS_MakeDir(rxconn,
(struct AFSFid *)&adp->f.fid.Fid,
aname,
&InStatus,
(struct AFSFid *)&newFid.Fid,
OutFidStatus,
OutDirStatus,
&CallBack,
&tsync);
RX_AFS_GLOCK();
XSTATS_END_TIME;
CallBack.ExpirationTime += now;
/* DON'T forget to Set the callback value... */
} else
code = -1;
} while (afs_Analyze
(tc, rxconn, code, &adp->f.fid, treq, AFS_STATS_FS_RPCIDX_MAKEDIR,
SHARED_LOCK, NULL));
if (code) {
if (code < 0) {
afs_StaleVCache(adp);
}
ReleaseWriteLock(&adp->lock);
if (tdc)
afs_PutDCache(tdc);
goto done;
}
} else {
/* Disconnected. */
/* We have the dir entry now, we can use it while disconnected. */
if (adp->mvid.target_root == NULL) {
/* If not mount point, generate a new fid. */
newFid.Cell = adp->f.fid.Cell;
newFid.Fid.Volume = adp->f.fid.Fid.Volume;
afs_GenFakeFid(&newFid, VDIR, 1);
}
/* XXX: If mount point???*/
/* Operations with the actual dir's cache entry are further
* down, where the dir entry gets created.
*/
} /* if (!AFS_IS_DISCON_RW) */
/* otherwise, we should see if we can make the change to the dir locally */
if (tdc)
ObtainWriteLock(&tdc->lock, 632);
if (AFS_IS_DISCON_RW || afs_LocalHero(adp, tdc, OutDirStatus, 1)) {
/* we can do it locally */
ObtainWriteLock(&afs_xdcache, 294);
code = afs_dir_Create(tdc, aname, &newFid.Fid);
ReleaseWriteLock(&afs_xdcache);
if (code) {
ZapDCE(tdc); /* surprise error -- use invalid value */
DZap(tdc);
}
}
if (tdc) {
ReleaseWriteLock(&tdc->lock);
afs_PutDCache(tdc);
}
if (AFS_IS_DISCON_RW)
/* We will have to settle with the local link count. */
adp->f.m.LinkCount++;
else
adp->f.m.LinkCount = OutDirStatus->LinkCount;
newFid.Cell = adp->f.fid.Cell;
newFid.Fid.Volume = adp->f.fid.Fid.Volume;
ReleaseWriteLock(&adp->lock);
if (AFS_IS_DISCON_RW) {
/* When disconnected, we have to create the full dir here. */
/* Generate a new vcache and fill it. */
tvc = afs_NewVCache(&newFid, NULL);
if (tvc) {
*avcp = tvc;
} else {
code = EIO;
goto done;
}
ObtainWriteLock(&tvc->lock, 738);
afs_GenDisconStatus(adp, tvc, &newFid, attrs, treq, VDIR);
ReleaseWriteLock(&tvc->lock);
/* And now make an empty dir, containing . and .. : */
/* Get a new dcache for it first. */
new_dc = afs_GetDCache(tvc, (afs_size_t) 0, treq, &offset, &len, 1);
if (!new_dc) {
/* printf("afs_mkdir: can't get new dcache for dir.\n"); */
code = EIO;
goto done;
}
ObtainWriteLock(&afs_xdcache, 739);
code = afs_dir_MakeDir(new_dc,
(afs_int32 *) &newFid.Fid,
(afs_int32 *) &adp->f.fid.Fid);
ReleaseWriteLock(&afs_xdcache);
/* if (code) printf("afs_mkdir: afs_dirMakeDir code = %u\n", code); */
afs_PutDCache(new_dc);
ObtainWriteLock(&tvc->lock, 731);
/* Update length in the vcache. */
tvc->f.m.Length = new_dc->f.chunkBytes;
afs_DisconAddDirty(tvc, VDisconCreate, 1);
ReleaseWriteLock(&tvc->lock);
} else {
/* now we're done with parent dir, create the real dir's cache entry */
tvc = afs_GetVCache(&newFid, treq, NULL, NULL);
if (tvc) {
code = 0;
*avcp = tvc;
} else {
/* For some reason, we cannot fetch the vcache for our
* newly-created dir. */
code = EIO;
}
} /* if (AFS_DISCON_RW) */
done:
AFS_DISCON_UNLOCK();
done3:
afs_PutFakeStat(&fakestate);
code = afs_CheckCode(code, treq, 26);
afs_DestroyReq(treq);
done2:
osi_FreeSmallSpace(OutFidStatus);
osi_FreeSmallSpace(OutDirStatus);
return code;
}
afs_rmdir(OSI_VC_DECL(adp), char *aname, afs_ucred_t *acred)
#endif
{
struct vrequest *treq = NULL;
struct dcache *tdc;
struct vcache *tvc = NULL;
afs_int32 code;
struct afs_conn *tc;
afs_size_t offset, len;
struct AFSFetchStatus OutDirStatus;
struct AFSVolSync tsync;
struct afs_fakestat_state fakestate;
struct rx_connection *rxconn;
XSTATS_DECLS;
OSI_VC_CONVERT(adp);
AFS_STATCNT(afs_rmdir);
afs_Trace2(afs_iclSetp, CM_TRACE_RMDIR, ICL_TYPE_POINTER, adp,
ICL_TYPE_STRING, aname);
if ((code = afs_CreateReq(&treq, acred)))
goto done2;
afs_InitFakeStat(&fakestate);
if (strlen(aname) > AFSNAMEMAX) {
code = ENAMETOOLONG;
goto done;
}
AFS_DISCON_LOCK();
code = afs_EvalFakeStat(&adp, &fakestate, treq);
if (code)
goto done;
code = afs_VerifyVCache(adp, treq);
if (code)
goto done;
/** If the volume is read-only, return error without making an RPC to the
* fileserver
*/
if (adp->f.states & CRO) {
code = EROFS;
goto done;
}
if (AFS_IS_DISCONNECTED && !AFS_IS_DISCON_RW) {
/* Disconnected read only mode. */
code = ENETDOWN;
goto done;
}
tdc = afs_GetDCache(adp, (afs_size_t) 0, treq, &offset, &len, 1); /* test for error below */
ObtainWriteLock(&adp->lock, 154);
if (tdc)
ObtainSharedLock(&tdc->lock, 633);
if (tdc && (adp->f.states & CForeign)) {
struct VenusFid unlinkFid;
unlinkFid.Fid.Vnode = 0;
code = afs_dir_Lookup(tdc, aname, &unlinkFid.Fid);
if (code == 0) {
afs_int32 cached = 0;
unlinkFid.Cell = adp->f.fid.Cell;
unlinkFid.Fid.Volume = adp->f.fid.Fid.Volume;
if (unlinkFid.Fid.Unique == 0) {
tvc =
afs_LookupVCache(&unlinkFid, treq, &cached, adp, aname);
} else {
ObtainReadLock(&afs_xvcache);
tvc = afs_FindVCache(&unlinkFid, 0, 1 /* do xstats */ );
ReleaseReadLock(&afs_xvcache);
}
}
}
if (!AFS_IS_DISCON_RW) {
/* Not disconnected, can connect to server. */
do {
tc = afs_Conn(&adp->f.fid, treq, SHARED_LOCK, &rxconn);
if (tc) {
XSTATS_START_TIME(AFS_STATS_FS_RPCIDX_REMOVEDIR);
RX_AFS_GUNLOCK();
code =
RXAFS_RemoveDir(rxconn,
(struct AFSFid *)&adp->f.fid.Fid,
aname,
&OutDirStatus,
&tsync);
RX_AFS_GLOCK();
XSTATS_END_TIME;
} else
code = -1;
} while (afs_Analyze
(tc, rxconn, code, &adp->f.fid, treq, AFS_STATS_FS_RPCIDX_REMOVEDIR,
SHARED_LOCK, NULL));
if (code) {
if (tdc) {
ReleaseSharedLock(&tdc->lock);
afs_PutDCache(tdc);
}
if (code < 0) {
afs_StaleVCache(adp);
}
ReleaseWriteLock(&adp->lock);
goto done;
}
/* here if rpc worked; update the in-core link count */
adp->f.m.LinkCount = OutDirStatus.LinkCount;
} else {
/* Disconnected. */
if (!tdc) {
ReleaseWriteLock(&adp->lock);
/* printf("afs_rmdir: No local dcache!\n"); */
code = ENETDOWN;
goto done;
}
if (!tvc) {
/* Find the vcache. */
struct VenusFid tfid;
tfid.Cell = adp->f.fid.Cell;
tfid.Fid.Volume = adp->f.fid.Fid.Volume;
code = afs_dir_Lookup(tdc, aname, &tfid.Fid);
ObtainSharedLock(&afs_xvcache, 764);
tvc = afs_FindVCache(&tfid, 0, 1 /* do xstats */ );
ReleaseSharedLock(&afs_xvcache);
if (!tvc) {
/* printf("afs_rmdir: Can't find dir's vcache!\n"); */
ReleaseSharedLock(&tdc->lock);
afs_PutDCache(tdc); /* drop ref count */
ReleaseWriteLock(&adp->lock);
code = ENETDOWN;
goto done;
}
}
if (tvc->f.m.LinkCount > 2) {
/* This dir contains more than . and .., thus it can't be
* deleted.
*/
ReleaseSharedLock(&tdc->lock);
afs_PutDCache(tdc);
afs_PutVCache(tvc);
ReleaseWriteLock(&adp->lock);
code = ENOTEMPTY;
goto done;
}
/* Make a shadow copy of the parent dir (if not done already).
* If we were created locally, then we don't need to have a shadow
* directory (as there's no server state to remember)
*/
if (!adp->f.shadow.vnode && !(adp->f.ddirty_flags & VDisconCreate)) {
afs_MakeShadowDir(adp, tdc);
}
adp->f.m.LinkCount--;
} /* if (!AFS_IS_DISCON_RW) */
if (tdc)
UpgradeSToWLock(&tdc->lock, 634);
if (AFS_IS_DISCON_RW || afs_LocalHero(adp, tdc, &OutDirStatus, 1)) {
/* we can do it locally */
code = afs_dir_Delete(tdc, aname);
if (code) {
ZapDCE(tdc); /* surprise error -- invalid value */
DZap(tdc);
}
}
if (tdc) {
ReleaseWriteLock(&tdc->lock);
afs_PutDCache(tdc); /* drop ref count */
}
if (tvc)
osi_dnlc_purgedp(tvc); /* get rid of any entries for this directory */
else
osi_dnlc_remove(adp, aname, 0);
if (tvc) {
ObtainWriteLock(&tvc->lock, 155);
tvc->f.states &= ~CUnique; /* For the dfs xlator */
if (AFS_IS_DISCON_RW) {
if (tvc->f.ddirty_flags & VDisconCreate) {
/* If we we were created whilst disconnected, removal doesn't
* need to get logged. Just go away gracefully */
afs_DisconRemoveDirty(tvc);
} else {
afs_DisconAddDirty(tvc, VDisconRemove, 1);
}
}
ReleaseWriteLock(&tvc->lock);
afs_PutVCache(tvc);
}
ReleaseWriteLock(&adp->lock);
/* don't worry about link count since dirs can not be hardlinked */
code = 0;
done:
AFS_DISCON_UNLOCK();
afs_PutFakeStat(&fakestate);
code = afs_CheckCode(code, treq, 27);
afs_DestroyReq(treq);
done2:
return code;
}
