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Differential D28833 Diff 84732 sys/fs/nfsclient/nfs_clvnops.c

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sys/fs/nfsclient/nfs_clvnops.c

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nfs_allocate(struct vop_allocate_args *ap) nfs_allocate(struct vop_allocate_args *ap)
{ {
struct vnode *vp = ap->a_vp; struct vnode *vp = ap->a_vp;
struct thread *td = curthread; struct thread *td = curthread;
struct nfsvattr nfsva; struct nfsvattr nfsva;
struct nfsmount *nmp; struct nfsmount *nmp;
int attrflag, error, ret; int attrflag, error, ret;
if ((ap->a_flags & SPACECTL_F_CANEXTEND) == 0)
*ap->a_len = omin(
*ap->a_len, VTONFS(vp)->n_size - *ap->a_offset);
if (*ap->a_len == 0)
return (0);
attrflag = 0; attrflag = 0;
nmp = VFSTONFS(vp->v_mount); nmp = VFSTONFS(vp->v_mount);
mtx_lock(&nmp->nm_mtx); mtx_lock(&nmp->nm_mtx);
if (NFSHASNFSV4(nmp) && nmp->nm_minorvers >= NFSV42_MINORVERSION && if (NFSHASNFSV4(nmp) && nmp->nm_minorvers >= NFSV42_MINORVERSION &&
(nmp->nm_privflag & NFSMNTP_NOALLOCATE) == 0) { (nmp->nm_privflag & NFSMNTP_NOALLOCATE) == 0) {
mtx_unlock(&nmp->nm_mtx); mtx_unlock(&nmp->nm_mtx);
/* /*
* Flush first to ensure that the allocate adds to the * Flush first to ensure that the allocate adds to the
* file's allocation on the server. * file's allocation on the server.
*/ */
error = ncl_flush(vp, MNT_WAIT, td, 1, 0); error = ncl_flush(vp, MNT_WAIT, td, 1, 0);
if (error == 0) if (error == 0)
error = nfsrpc_allocate(vp, *ap->a_offset, *ap->a_len, error = nfsrpc_allocate(vp, *ap->a_offset, *ap->a_len,
&nfsva, &attrflag, td->td_ucred, td, NULL); &nfsva, &attrflag, ap->a_cred, td, NULL);
if (error == 0) { if (error == 0) {
*ap->a_offset += *ap->a_len; *ap->a_offset += *ap->a_len;
*ap->a_len = 0; *ap->a_len = 0;
} else if (error == NFSERR_NOTSUPP) { } else if (error == NFSERR_NOTSUPP) {
mtx_lock(&nmp->nm_mtx); mtx_lock(&nmp->nm_mtx);
nmp->nm_privflag |= NFSMNTP_NOALLOCATE; nmp->nm_privflag |= NFSMNTP_NOALLOCATE;
mtx_unlock(&nmp->nm_mtx); mtx_unlock(&nmp->nm_mtx);
} }
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