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Pushdown Giant for nfs syscalls (nfssvc())

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This commit is contained in:
Matthew Dillon 2001-08-31 22:39:36 +00:00
parent 2afac34da3
commit 4e174404a3
Notes: svn2git 2020-12-20 02:59:44 +00:00 
svn path=/head/; revision=82702
3 changed files with 69 additions and 36 deletions
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35
sys/nfs/nfs_syscalls.c
View File

@ -136,6 +136,9 @@ struct nfssvc_args {
caddr_t argp;
};
#endif
/*
* MPSAFE
*/
int
nfssvc(p, uap)
struct proc *p;
@ -155,18 +158,22 @@ nfssvc(p, uap)
#endif /* NFS_NOSERVER */
int error;
mtx_lock(&Giant);
if ((uap->flag & NFSSVC_LOCKDANS) != 0) {
struct lockd_ans la;
error = copyin(uap->argp, &la, sizeof(la));
return (error != 0 ? error : nfslockdans(p, &la));
if (error == 0)
error = nfslockdans(p, &la);
goto done2;
}
/*
* Must be super user
*/
error = suser(p);
if(error)
return (error);
if (error)
goto done2;
while (nfssvc_sockhead_flag & SLP_INIT) {
nfssvc_sockhead_flag |= SLP_WANTINIT;
(void) tsleep((caddr_t)&nfssvc_sockhead, PSOCK, "nfsd init", 0);
@ -180,32 +187,34 @@ nfssvc(p, uap)
else if (uap->flag & NFSSVC_MNTD) {
error = copyin(uap->argp, (caddr_t)&ncd, sizeof (ncd));
if (error)
return (error);
goto done2;
NDINIT(&nd, LOOKUP, FOLLOW | LOCKLEAF, UIO_USERSPACE,
ncd.ncd_dirp, p);
error = namei(&nd);
if (error)
return (error);
goto done2;
NDFREE(&nd, NDF_ONLY_PNBUF);
if ((nd.ni_vp->v_flag & VROOT) == 0)
error = EINVAL;
nmp = VFSTONFS(nd.ni_vp->v_mount);
vput(nd.ni_vp);
if (error)
return (error);
goto done2;
if ((nmp->nm_state & NFSSTA_MNTD) &&
(uap->flag & NFSSVC_GOTAUTH) == 0)
return (0);
(uap->flag & NFSSVC_GOTAUTH) == 0) {
error = 0;
goto done2;
}
nmp->nm_state |= NFSSTA_MNTD;
error = nqnfs_clientd(nmp, p->p_ucred, &ncd, uap->flag,
uap->argp, p);
} else if (uap->flag & NFSSVC_ADDSOCK) {
error = copyin(uap->argp, (caddr_t)&nfsdarg, sizeof(nfsdarg));
if (error)
return (error);
goto done2;
error = holdsock(p->p_fd, nfsdarg.sock, &fp);
if (error)
return (error);
goto done2;
/*
* Get the client address for connected sockets.
*/
@ -216,7 +225,7 @@ nfssvc(p, uap)
nfsdarg.namelen);
if (error) {
fdrop(fp, p);
return (error);
goto done2;
}
}
error = nfssvc_addsock(fp, nam, p);
@ -224,7 +233,7 @@ nfssvc(p, uap)
} else {
error = copyin(uap->argp, (caddr_t)nsd, sizeof (*nsd));
if (error)
return (error);
goto done2;
if ((uap->flag & NFSSVC_AUTHIN) &&
((nfsd = nsd->nsd_nfsd)) != NULL &&
(nfsd->nfsd_slp->ns_flag & SLP_VALID)) {
@ -323,6 +332,8 @@ nfssvc(p, uap)
#endif /* NFS_NOSERVER */
if (error == EINTR || error == ERESTART)
error = 0;
done2:
mtx_unlock(&Giant);
return (error);
}

35
sys/nfsclient/nfs_nfsiod.c
View File

@ -136,6 +136,9 @@ struct nfssvc_args {
caddr_t argp;
};
#endif
/*
* MPSAFE
*/
int
nfssvc(p, uap)
struct proc *p;
@ -155,18 +158,22 @@ nfssvc(p, uap)
#endif /* NFS_NOSERVER */
int error;
mtx_lock(&Giant);
if ((uap->flag & NFSSVC_LOCKDANS) != 0) {
struct lockd_ans la;
error = copyin(uap->argp, &la, sizeof(la));
return (error != 0 ? error : nfslockdans(p, &la));
if (error == 0)
error = nfslockdans(p, &la);
goto done2;
}
/*
* Must be super user
*/
error = suser(p);
if(error)
return (error);
if (error)
goto done2;
while (nfssvc_sockhead_flag & SLP_INIT) {
nfssvc_sockhead_flag |= SLP_WANTINIT;
(void) tsleep((caddr_t)&nfssvc_sockhead, PSOCK, "nfsd init", 0);
@ -180,32 +187,34 @@ nfssvc(p, uap)
else if (uap->flag & NFSSVC_MNTD) {
error = copyin(uap->argp, (caddr_t)&ncd, sizeof (ncd));
if (error)
return (error);
goto done2;
NDINIT(&nd, LOOKUP, FOLLOW | LOCKLEAF, UIO_USERSPACE,
ncd.ncd_dirp, p);
error = namei(&nd);
if (error)
return (error);
goto done2;
NDFREE(&nd, NDF_ONLY_PNBUF);
if ((nd.ni_vp->v_flag & VROOT) == 0)
error = EINVAL;
nmp = VFSTONFS(nd.ni_vp->v_mount);
vput(nd.ni_vp);
if (error)
return (error);
goto done2;
if ((nmp->nm_state & NFSSTA_MNTD) &&
(uap->flag & NFSSVC_GOTAUTH) == 0)
return (0);
(uap->flag & NFSSVC_GOTAUTH) == 0) {
error = 0;
goto done2;
}
nmp->nm_state |= NFSSTA_MNTD;
error = nqnfs_clientd(nmp, p->p_ucred, &ncd, uap->flag,
uap->argp, p);
} else if (uap->flag & NFSSVC_ADDSOCK) {
error = copyin(uap->argp, (caddr_t)&nfsdarg, sizeof(nfsdarg));
if (error)
return (error);
goto done2;
error = holdsock(p->p_fd, nfsdarg.sock, &fp);
if (error)
return (error);
goto done2;
/*
* Get the client address for connected sockets.
*/
@ -216,7 +225,7 @@ nfssvc(p, uap)
nfsdarg.namelen);
if (error) {
fdrop(fp, p);
return (error);
goto done2;
}
}
error = nfssvc_addsock(fp, nam, p);
@ -224,7 +233,7 @@ nfssvc(p, uap)
} else {
error = copyin(uap->argp, (caddr_t)nsd, sizeof (*nsd));
if (error)
return (error);
goto done2;
if ((uap->flag & NFSSVC_AUTHIN) &&
((nfsd = nsd->nsd_nfsd)) != NULL &&
(nfsd->nfsd_slp->ns_flag & SLP_VALID)) {
@ -323,6 +332,8 @@ nfssvc(p, uap)
#endif /* NFS_NOSERVER */
if (error == EINTR || error == ERESTART)
error = 0;
done2:
mtx_unlock(&Giant);
return (error);
}

35
sys/nfsserver/nfs_syscalls.c
View File

@ -136,6 +136,9 @@ struct nfssvc_args {
caddr_t argp;
};
#endif
/*
* MPSAFE
*/
int
nfssvc(p, uap)
struct proc *p;
@ -155,18 +158,22 @@ nfssvc(p, uap)
#endif /* NFS_NOSERVER */
int error;
mtx_lock(&Giant);
if ((uap->flag & NFSSVC_LOCKDANS) != 0) {
struct lockd_ans la;
error = copyin(uap->argp, &la, sizeof(la));
return (error != 0 ? error : nfslockdans(p, &la));
if (error == 0)
error = nfslockdans(p, &la);
goto done2;
}
/*
* Must be super user
*/
error = suser(p);
if(error)
return (error);
if (error)
goto done2;
while (nfssvc_sockhead_flag & SLP_INIT) {
nfssvc_sockhead_flag |= SLP_WANTINIT;
(void) tsleep((caddr_t)&nfssvc_sockhead, PSOCK, "nfsd init", 0);
@ -180,32 +187,34 @@ nfssvc(p, uap)
else if (uap->flag & NFSSVC_MNTD) {
error = copyin(uap->argp, (caddr_t)&ncd, sizeof (ncd));
if (error)
return (error);
goto done2;
NDINIT(&nd, LOOKUP, FOLLOW | LOCKLEAF, UIO_USERSPACE,
ncd.ncd_dirp, p);
error = namei(&nd);
if (error)
return (error);
goto done2;
NDFREE(&nd, NDF_ONLY_PNBUF);
if ((nd.ni_vp->v_flag & VROOT) == 0)
error = EINVAL;
nmp = VFSTONFS(nd.ni_vp->v_mount);
vput(nd.ni_vp);
if (error)
return (error);
goto done2;
if ((nmp->nm_state & NFSSTA_MNTD) &&
(uap->flag & NFSSVC_GOTAUTH) == 0)
return (0);
(uap->flag & NFSSVC_GOTAUTH) == 0) {
error = 0;
goto done2;
}
nmp->nm_state |= NFSSTA_MNTD;
error = nqnfs_clientd(nmp, p->p_ucred, &ncd, uap->flag,
uap->argp, p);
} else if (uap->flag & NFSSVC_ADDSOCK) {
error = copyin(uap->argp, (caddr_t)&nfsdarg, sizeof(nfsdarg));
if (error)
return (error);
goto done2;
error = holdsock(p->p_fd, nfsdarg.sock, &fp);
if (error)
return (error);
goto done2;
/*
* Get the client address for connected sockets.
*/
@ -216,7 +225,7 @@ nfssvc(p, uap)
nfsdarg.namelen);
if (error) {
fdrop(fp, p);
return (error);
goto done2;
}
}
error = nfssvc_addsock(fp, nam, p);
@ -224,7 +233,7 @@ nfssvc(p, uap)
} else {
error = copyin(uap->argp, (caddr_t)nsd, sizeof (*nsd));
if (error)
return (error);
goto done2;
if ((uap->flag & NFSSVC_AUTHIN) &&
((nfsd = nsd->nsd_nfsd)) != NULL &&
(nfsd->nfsd_slp->ns_flag & SLP_VALID)) {
@ -323,6 +332,8 @@ nfssvc(p, uap)
#endif /* NFS_NOSERVER */
if (error == EINTR || error == ERESTART)
error = 0;
done2:
mtx_unlock(&Giant);
return (error);
}