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When p_ucred is passed to the venus daemon, first grab the proc lock to

Browse source 
protect the p_ucred pointer, obtain a seperate reference to the ucred,
release the lock, and then pass in the new ucred reference.
This commit is contained in:
John Baldwin 2000-12-15 00:12:30 +00:00
parent ec244c5695
commit ea10b6b78e
Notes: svn2git 2020-12-20 02:59:44 +00:00 
svn path=/head/; revision=70038
2 changed files with 28 additions and 4 deletions
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16
sys/coda/coda_vfsops.c
View file

@ -294,6 +294,7 @@ coda_root(vfsp, vpp)
int error;
struct proc *p = curproc; /* XXX - bnoble */
ViceFid VFid;
struct ucred* uc;
ENTRY;
MARK_ENTRY(CODA_ROOT_STATS);
@ -317,7 +318,12 @@ coda_root(vfsp, vpp)
}
}
error = venus_root(vftomi(vfsp), p->p_ucred, p, &VFid);
PROC_LOCK(p);
uc = p->p_ucred;
crhold(uc);
PROC_UNLOCK(p);
error = venus_root(vftomi(vfsp), uc, p, &VFid);
crfree(uc);
if (!error) {
/*
@ -443,6 +449,7 @@ coda_fhtovp(vfsp, fhp, nam, vpp, exflagsp, creadanonp)
int error;
struct proc *p = curproc; /* XXX -mach */
ViceFid VFid;
struct ucred *uc;
int vtype;
ENTRY;
@ -456,7 +463,12 @@ coda_fhtovp(vfsp, fhp, nam, vpp, exflagsp, creadanonp)
return(0);
}
error = venus_fhtovp(vftomi(vfsp), &cfid->cfid_fid, p->p_ucred, p, &VFid, &vtype);
PROC_LOCK(p);
uc = p->p_ucred;
crhold(uc);
PROC_UNLOCK(p);
error = venus_fhtovp(vftomi(vfsp), &cfid->cfid_fid, uc, p, &VFid, &vtype);
crfree(uc);
if (error) {
CODADEBUG(CODA_VGET, myprintf(("vget error %d\n",error));)

16
sys/fs/coda/coda_vfsops.c
View file

@ -294,6 +294,7 @@ coda_root(vfsp, vpp)
int error;
struct proc *p = curproc; /* XXX - bnoble */
ViceFid VFid;
struct ucred* uc;
ENTRY;
MARK_ENTRY(CODA_ROOT_STATS);
@ -317,7 +318,12 @@ coda_root(vfsp, vpp)
}
}
error = venus_root(vftomi(vfsp), p->p_ucred, p, &VFid);
PROC_LOCK(p);
uc = p->p_ucred;
crhold(uc);
PROC_UNLOCK(p);
error = venus_root(vftomi(vfsp), uc, p, &VFid);
crfree(uc);
if (!error) {
/*
@ -443,6 +449,7 @@ coda_fhtovp(vfsp, fhp, nam, vpp, exflagsp, creadanonp)
int error;
struct proc *p = curproc; /* XXX -mach */
ViceFid VFid;
struct ucred *uc;
int vtype;
ENTRY;
@ -456,7 +463,12 @@ coda_fhtovp(vfsp, fhp, nam, vpp, exflagsp, creadanonp)
return(0);
}
error = venus_fhtovp(vftomi(vfsp), &cfid->cfid_fid, p->p_ucred, p, &VFid, &vtype);
PROC_LOCK(p);
uc = p->p_ucred;
crhold(uc);
PROC_UNLOCK(p);
error = venus_fhtovp(vftomi(vfsp), &cfid->cfid_fid, uc, p, &VFid, &vtype);
crfree(uc);
if (error) {
CODADEBUG(CODA_VGET, myprintf(("vget error %d\n",error));)