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NFSD: add posix ACLs to struct nfsd_attrs
pacl and dpacl pointers are added to struct nfsd_attrs, which requires that we have an nfsd_attrs_free() function to free them. Those nfsv4 functions that can set ACLs now set up these pointers based on the passed in NFSv4 ACL. nfsd_setattr() sets the acls as appropriate. Errors are handled as with security labels. Signed-off-by: NeilBrown <neilb@suse.de> Signed-off-by: Chuck Lever <chuck.lever@oracle.com>
This commit is contained in:
NeilBrown
Chuck Lever
parent
d6a97d3f58
commit
c0cbe70742
@ -38,6 +38,8 @@
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struct nfs4_acl;
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struct svc_fh;
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struct svc_rqst;
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struct nfsd_attrs;
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enum nfs_ftype4;
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int nfs4_acl_bytes(int entries);
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int nfs4_acl_get_whotype(char *, u32);
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@ -45,7 +47,7 @@ __be32 nfs4_acl_write_who(struct xdr_stream *xdr, int who);
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int nfsd4_get_nfs4_acl(struct svc_rqst *rqstp, struct dentry *dentry,
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struct nfs4_acl **acl);
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__be32 nfsd4_set_nfs4_acl(struct svc_rqst *rqstp, struct svc_fh *fhp,
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struct nfs4_acl *acl);
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__be32 nfsd4_acl_to_attr(enum nfs_ftype4 type, struct nfs4_acl *acl,
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struct nfsd_attrs *attr);
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#endif /* LINUX_NFS4_ACL_H */
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@ -751,58 +751,26 @@ out_estate:
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return ret;
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}
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__be32
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nfsd4_set_nfs4_acl(struct svc_rqst *rqstp, struct svc_fh *fhp,
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struct nfs4_acl *acl)
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__be32 nfsd4_acl_to_attr(enum nfs_ftype4 type, struct nfs4_acl *acl,
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struct nfsd_attrs *attr)
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{
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__be32 error;
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int host_error;
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struct dentry *dentry;
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struct inode *inode;
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struct posix_acl *pacl = NULL, *dpacl = NULL;
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unsigned int flags = 0;
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/* Get inode */
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error = fh_verify(rqstp, fhp, 0, NFSD_MAY_SATTR);
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if (error)
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return error;
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if (!acl)
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return nfs_ok;
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dentry = fhp->fh_dentry;
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inode = d_inode(dentry);
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if (S_ISDIR(inode->i_mode))
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if (type == NF4DIR)
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flags = NFS4_ACL_DIR;
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host_error = nfs4_acl_nfsv4_to_posix(acl, &pacl, &dpacl, flags);
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host_error = nfs4_acl_nfsv4_to_posix(acl, &attr->na_pacl,
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&attr->na_dpacl, flags);
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if (host_error == -EINVAL)
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return nfserr_attrnotsupp;
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if (host_error < 0)
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goto out_nfserr;
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fh_lock(fhp);
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host_error = set_posix_acl(&init_user_ns, inode, ACL_TYPE_ACCESS, pacl);
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if (host_error < 0)
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goto out_drop_lock;
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if (S_ISDIR(inode->i_mode)) {
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host_error = set_posix_acl(&init_user_ns, inode,
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ACL_TYPE_DEFAULT, dpacl);
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}
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out_drop_lock:
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fh_unlock(fhp);
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posix_acl_release(pacl);
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posix_acl_release(dpacl);
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out_nfserr:
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if (host_error == -EOPNOTSUPP)
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return nfserr_attrnotsupp;
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else
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return nfserrno(host_error);
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}
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static short
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ace2type(struct nfs4_ace *ace)
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{
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@ -128,26 +128,6 @@ is_create_with_attrs(struct nfsd4_open *open)
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|| open->op_createmode == NFS4_CREATE_EXCLUSIVE4_1);
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}
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/*
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* if error occurs when setting the acl, just clear the acl bit
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* in the returned attr bitmap.
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*/
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static void
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do_set_nfs4_acl(struct svc_rqst *rqstp, struct svc_fh *fhp,
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struct nfs4_acl *acl, u32 *bmval)
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{
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__be32 status;
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status = nfsd4_set_nfs4_acl(rqstp, fhp, acl);
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if (status)
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/*
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* We should probably fail the whole open at this point,
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* but we've already created the file, so it's too late;
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* So this seems the least of evils:
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*/
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bmval[0] &= ~FATTR4_WORD0_ACL;
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}
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static inline void
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fh_dup2(struct svc_fh *dst, struct svc_fh *src)
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{
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@ -281,6 +261,9 @@ nfsd4_create_file(struct svc_rqst *rqstp, struct svc_fh *fhp,
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if (host_err)
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return nfserrno(host_err);
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if (is_create_with_attrs(open))
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nfsd4_acl_to_attr(NF4REG, open->op_acl, &attrs);
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fh_lock_nested(fhp, I_MUTEX_PARENT);
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child = lookup_one_len(open->op_fname, parent, open->op_fnamelen);
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@ -382,8 +365,11 @@ set_attr:
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if (attrs.na_labelerr)
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open->op_bmval[2] &= ~FATTR4_WORD2_SECURITY_LABEL;
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if (attrs.na_aclerr)
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open->op_bmval[0] &= ~FATTR4_WORD0_ACL;
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out:
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fh_unlock(fhp);
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nfsd_attrs_free(&attrs);
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if (child && !IS_ERR(child))
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dput(child);
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fh_drop_write(fhp);
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@ -446,9 +432,6 @@ do_open_lookup(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, stru
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if (status)
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goto out;
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if (is_create_with_attrs(open) && open->op_acl != NULL)
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do_set_nfs4_acl(rqstp, *resfh, open->op_acl, open->op_bmval);
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nfsd4_set_open_owner_reply_cache(cstate, open, *resfh);
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accmode = NFSD_MAY_NOP;
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if (open->op_created ||
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@ -779,6 +762,7 @@ nfsd4_create(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
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if (status)
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return status;
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status = nfsd4_acl_to_attr(create->cr_type, create->cr_acl, &attrs);
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current->fs->umask = create->cr_umask;
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switch (create->cr_type) {
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case NF4LNK:
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@ -837,10 +821,8 @@ nfsd4_create(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
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if (attrs.na_labelerr)
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create->cr_bmval[2] &= ~FATTR4_WORD2_SECURITY_LABEL;
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if (create->cr_acl != NULL)
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do_set_nfs4_acl(rqstp, &resfh, create->cr_acl,
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create->cr_bmval);
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if (attrs.na_aclerr)
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create->cr_bmval[0] &= ~FATTR4_WORD0_ACL;
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fh_unlock(&cstate->current_fh);
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set_change_info(&create->cr_cinfo, &cstate->current_fh);
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@ -849,6 +831,7 @@ out:
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fh_put(&resfh);
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out_umask:
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current->fs->umask = 0;
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nfsd_attrs_free(&attrs);
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return status;
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}
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@ -1123,6 +1106,7 @@ nfsd4_setattr(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
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.na_iattr = &setattr->sa_iattr,
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.na_seclabel = &setattr->sa_label,
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};
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struct inode *inode;
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__be32 status = nfs_ok;
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int err;
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@ -1145,9 +1129,10 @@ nfsd4_setattr(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
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if (status)
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goto out;
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if (setattr->sa_acl != NULL)
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status = nfsd4_set_nfs4_acl(rqstp, &cstate->current_fh,
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setattr->sa_acl);
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inode = cstate->current_fh.fh_dentry->d_inode;
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status = nfsd4_acl_to_attr(S_ISDIR(inode->i_mode) ? NF4DIR : NF4REG,
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setattr->sa_acl, &attrs);
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if (status)
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goto out;
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status = nfsd_setattr(rqstp, &cstate->current_fh, &attrs,
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@ -1155,6 +1140,7 @@ nfsd4_setattr(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
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if (!status)
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status = nfserrno(attrs.na_labelerr);
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out:
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nfsd_attrs_free(&attrs);
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fh_drop_write(&cstate->current_fh);
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return status;
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}
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@ -461,6 +461,15 @@ out_unlock:
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if (attr->na_seclabel && attr->na_seclabel->len)
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attr->na_labelerr = security_inode_setsecctx(dentry,
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attr->na_seclabel->data, attr->na_seclabel->len);
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if (IS_ENABLED(CONFIG_FS_POSIX_ACL) && attr->na_pacl)
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attr->na_aclerr = set_posix_acl(&init_user_ns,
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inode, ACL_TYPE_ACCESS,
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attr->na_pacl);
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if (IS_ENABLED(CONFIG_FS_POSIX_ACL) &&
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!attr->na_aclerr && attr->na_dpacl && S_ISDIR(inode->i_mode))
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attr->na_aclerr = set_posix_acl(&init_user_ns,
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inode, ACL_TYPE_DEFAULT,
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attr->na_dpacl);
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fh_unlock(fhp);
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if (size_change)
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put_write_access(inode);
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@ -6,6 +6,8 @@
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#ifndef LINUX_NFSD_VFS_H
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#define LINUX_NFSD_VFS_H
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#include <linux/fs.h>
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#include <linux/posix_acl.h>
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#include "nfsfh.h"
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#include "nfsd.h"
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@ -45,10 +47,19 @@ typedef int (*nfsd_filldir_t)(void *, const char *, int, loff_t, u64, unsigned);
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struct nfsd_attrs {
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struct iattr *na_iattr; /* input */
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struct xdr_netobj *na_seclabel; /* input */
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struct posix_acl *na_pacl; /* input */
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struct posix_acl *na_dpacl; /* input */
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int na_labelerr; /* output */
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int na_aclerr; /* output */
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};
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static inline void nfsd_attrs_free(struct nfsd_attrs *attrs)
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{
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posix_acl_release(attrs->na_pacl);
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posix_acl_release(attrs->na_dpacl);
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}
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int nfsd_cross_mnt(struct svc_rqst *rqstp, struct dentry **dpp,
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struct svc_export **expp);
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__be32 nfsd_lookup(struct svc_rqst *, struct svc_fh *,
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