static void
BStore(struct brequest *ab)
{
struct vcache *tvc;
afs_int32 code;
struct vrequest *treq = NULL;
#if defined(AFS_SGI_ENV)
struct cred *tmpcred;
#endif
AFS_STATCNT(BStore);
if ((code = afs_CreateReq(&treq, ab->cred)))
return;
tvc = ab->vc;
#if defined(AFS_SGI_ENV)
/*
* Since StoreOnLastReference can end up calling osi_SyncVM which
* calls into VM code that assumes that u.u_cred has the
* correct credentials, we set our to theirs for this xaction
*/
tmpcred = OSI_GET_CURRENT_CRED();
OSI_SET_CURRENT_CRED(ab->cred);
/*
* To avoid recursion since the WriteLock may be released during VM
* operations, we hold the VOP_RWLOCK across this transaction as
* do the other callers of StoreOnLastReference
*/
AFS_RWLOCK((vnode_t *) tvc, 1);
#endif
ObtainWriteLock(&tvc->lock, 209);
code = afs_StoreOnLastReference(tvc, treq);
ReleaseWriteLock(&tvc->lock);
#if defined(AFS_SGI_ENV)
OSI_SET_CURRENT_CRED(tmpcred);
AFS_RWUNLOCK((vnode_t *) tvc, 1);
#endif
/* now set final return code, and wakeup anyone waiting */
if ((ab->flags & BUVALID) == 0) {
/* To explain code_raw/code_checkcode:
* Anyone that's waiting won't have our treq, so they won't be able to
* call afs_CheckCode themselves on the return code we provide here.
* But if we give back only the afs_CheckCode value, they won't know
* what the "raw" value was. So give back both values, so the waiter
* can know the "raw" value for interpreting the value internally, as
* well as the afs_CheckCode value to give to the OS. */
ab->code_raw = code;
ab->code_checkcode = afs_CheckCode(code, treq, 430);
ab->flags |= BUVALID;
if (ab->flags & BUWAIT) {
ab->flags &= ~BUWAIT;
afs_osi_Wakeup(ab);
}
}
afs_DestroyReq(treq);
}
static void
BStore(struct brequest *ab)
{
struct vcache *tvc;
afs_int32 code;
struct vrequest treq;
#if defined(AFS_SGI_ENV)
struct cred *tmpcred;
#endif
AFS_STATCNT(BStore);
if ((code = afs_InitReq(&treq, ab->cred)))
return;
code = 0;
tvc = ab->vc;
#if defined(AFS_SGI_ENV)
/*
* Since StoreOnLastReference can end up calling osi_SyncVM which
* calls into VM code that assumes that u.u_cred has the
* correct credentials, we set our to theirs for this xaction
*/
tmpcred = OSI_GET_CURRENT_CRED();
OSI_SET_CURRENT_CRED(ab->cred);
/*
* To avoid recursion since the WriteLock may be released during VM
* operations, we hold the VOP_RWLOCK across this transaction as
* do the other callers of StoreOnLastReference
*/
AFS_RWLOCK((vnode_t *) tvc, 1);
#endif
ObtainWriteLock(&tvc->lock, 209);
code = afs_StoreOnLastReference(tvc, &treq);
ReleaseWriteLock(&tvc->lock);
#if defined(AFS_SGI_ENV)
OSI_SET_CURRENT_CRED(tmpcred);
AFS_RWUNLOCK((vnode_t *) tvc, 1);
#endif
/* now set final return code, and wakeup anyone waiting */
if ((ab->flags & BUVALID) == 0) {
ab->code = afs_CheckCode(code, &treq, 43); /* set final code, since treq doesn't go across processes */
ab->flags |= BUVALID;
if (ab->flags & BUWAIT) {
ab->flags &= ~BUWAIT;
afs_osi_Wakeup(ab);
}
}
}