d40aa3372f
Assignments should not happen inside an if conditional, but in the line before. This issue was reported by checkpatch. The semantic patch that makes this change is as follows (http://coccinelle.lip6.fr/): // <smpl> @@ identifier i1; expression e1; statement S; @@ -if(!(i1 = e1)) S +i1 = e1; +if(!i1) +S // </smpl> It has been tested by compilation. Signed-off-by: Benoit Taine <benoit.taine@lip6.fr> Signed-off-by: J. Bruce Fields <bfields@redhat.com>
274 lines
6.4 KiB
C
274 lines
6.4 KiB
C
/*
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* Process version 3 NFSACL requests.
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*
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* Copyright (C) 2002-2003 Andreas Gruenbacher <agruen@suse.de>
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*/
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#include "nfsd.h"
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/* FIXME: nfsacl.h is a broken header */
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#include <linux/nfsacl.h>
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#include <linux/gfp.h>
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#include "cache.h"
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#include "xdr3.h"
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#include "vfs.h"
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#define RETURN_STATUS(st) { resp->status = (st); return (st); }
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/*
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* NULL call.
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*/
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static __be32
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nfsd3_proc_null(struct svc_rqst *rqstp, void *argp, void *resp)
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{
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return nfs_ok;
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}
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/*
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* Get the Access and/or Default ACL of a file.
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*/
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static __be32 nfsd3_proc_getacl(struct svc_rqst * rqstp,
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struct nfsd3_getaclargs *argp, struct nfsd3_getaclres *resp)
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{
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struct posix_acl *acl;
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struct inode *inode;
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svc_fh *fh;
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__be32 nfserr = 0;
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fh = fh_copy(&resp->fh, &argp->fh);
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nfserr = fh_verify(rqstp, &resp->fh, 0, NFSD_MAY_NOP);
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if (nfserr)
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RETURN_STATUS(nfserr);
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inode = fh->fh_dentry->d_inode;
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if (argp->mask & ~(NFS_ACL|NFS_ACLCNT|NFS_DFACL|NFS_DFACLCNT))
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RETURN_STATUS(nfserr_inval);
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resp->mask = argp->mask;
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if (resp->mask & (NFS_ACL|NFS_ACLCNT)) {
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acl = get_acl(inode, ACL_TYPE_ACCESS);
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if (IS_ERR(acl)) {
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nfserr = nfserrno(PTR_ERR(acl));
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goto fail;
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}
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if (acl == NULL) {
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/* Solaris returns the inode's minimum ACL. */
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acl = posix_acl_from_mode(inode->i_mode, GFP_KERNEL);
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}
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resp->acl_access = acl;
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}
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if (resp->mask & (NFS_DFACL|NFS_DFACLCNT)) {
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/* Check how Solaris handles requests for the Default ACL
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of a non-directory! */
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acl = get_acl(inode, ACL_TYPE_DEFAULT);
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if (IS_ERR(acl)) {
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nfserr = nfserrno(PTR_ERR(acl));
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goto fail;
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}
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resp->acl_default = acl;
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}
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/* resp->acl_{access,default} are released in nfs3svc_release_getacl. */
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RETURN_STATUS(0);
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fail:
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posix_acl_release(resp->acl_access);
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posix_acl_release(resp->acl_default);
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RETURN_STATUS(nfserr);
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}
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/*
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* Set the Access and/or Default ACL of a file.
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*/
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static __be32 nfsd3_proc_setacl(struct svc_rqst * rqstp,
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struct nfsd3_setaclargs *argp,
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struct nfsd3_attrstat *resp)
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{
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struct inode *inode;
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svc_fh *fh;
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__be32 nfserr = 0;
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int error;
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fh = fh_copy(&resp->fh, &argp->fh);
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nfserr = fh_verify(rqstp, &resp->fh, 0, NFSD_MAY_SATTR);
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if (nfserr)
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goto out;
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inode = fh->fh_dentry->d_inode;
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if (!IS_POSIXACL(inode) || !inode->i_op->set_acl) {
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error = -EOPNOTSUPP;
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goto out_errno;
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}
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error = fh_want_write(fh);
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if (error)
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goto out_errno;
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error = inode->i_op->set_acl(inode, argp->acl_access, ACL_TYPE_ACCESS);
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if (error)
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goto out_drop_write;
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error = inode->i_op->set_acl(inode, argp->acl_default,
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ACL_TYPE_DEFAULT);
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out_drop_write:
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fh_drop_write(fh);
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out_errno:
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nfserr = nfserrno(error);
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out:
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/* argp->acl_{access,default} may have been allocated in
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nfs3svc_decode_setaclargs. */
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posix_acl_release(argp->acl_access);
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posix_acl_release(argp->acl_default);
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RETURN_STATUS(nfserr);
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}
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/*
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* XDR decode functions
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*/
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static int nfs3svc_decode_getaclargs(struct svc_rqst *rqstp, __be32 *p,
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struct nfsd3_getaclargs *args)
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{
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p = nfs3svc_decode_fh(p, &args->fh);
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if (!p)
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return 0;
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args->mask = ntohl(*p); p++;
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return xdr_argsize_check(rqstp, p);
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}
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static int nfs3svc_decode_setaclargs(struct svc_rqst *rqstp, __be32 *p,
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struct nfsd3_setaclargs *args)
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{
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struct kvec *head = rqstp->rq_arg.head;
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unsigned int base;
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int n;
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p = nfs3svc_decode_fh(p, &args->fh);
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if (!p)
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return 0;
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args->mask = ntohl(*p++);
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if (args->mask & ~(NFS_ACL|NFS_ACLCNT|NFS_DFACL|NFS_DFACLCNT) ||
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!xdr_argsize_check(rqstp, p))
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return 0;
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base = (char *)p - (char *)head->iov_base;
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n = nfsacl_decode(&rqstp->rq_arg, base, NULL,
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(args->mask & NFS_ACL) ?
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&args->acl_access : NULL);
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if (n > 0)
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n = nfsacl_decode(&rqstp->rq_arg, base + n, NULL,
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(args->mask & NFS_DFACL) ?
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&args->acl_default : NULL);
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return (n > 0);
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}
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/*
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* XDR encode functions
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*/
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/* GETACL */
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static int nfs3svc_encode_getaclres(struct svc_rqst *rqstp, __be32 *p,
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struct nfsd3_getaclres *resp)
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{
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struct dentry *dentry = resp->fh.fh_dentry;
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p = nfs3svc_encode_post_op_attr(rqstp, p, &resp->fh);
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if (resp->status == 0 && dentry && dentry->d_inode) {
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struct inode *inode = dentry->d_inode;
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struct kvec *head = rqstp->rq_res.head;
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unsigned int base;
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int n;
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int w;
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*p++ = htonl(resp->mask);
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if (!xdr_ressize_check(rqstp, p))
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return 0;
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base = (char *)p - (char *)head->iov_base;
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rqstp->rq_res.page_len = w = nfsacl_size(
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(resp->mask & NFS_ACL) ? resp->acl_access : NULL,
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(resp->mask & NFS_DFACL) ? resp->acl_default : NULL);
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while (w > 0) {
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if (!*(rqstp->rq_next_page++))
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return 0;
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w -= PAGE_SIZE;
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}
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n = nfsacl_encode(&rqstp->rq_res, base, inode,
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resp->acl_access,
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resp->mask & NFS_ACL, 0);
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if (n > 0)
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n = nfsacl_encode(&rqstp->rq_res, base + n, inode,
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resp->acl_default,
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resp->mask & NFS_DFACL,
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NFS_ACL_DEFAULT);
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if (n <= 0)
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return 0;
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} else
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if (!xdr_ressize_check(rqstp, p))
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return 0;
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return 1;
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}
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/* SETACL */
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static int nfs3svc_encode_setaclres(struct svc_rqst *rqstp, __be32 *p,
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struct nfsd3_attrstat *resp)
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{
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p = nfs3svc_encode_post_op_attr(rqstp, p, &resp->fh);
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return xdr_ressize_check(rqstp, p);
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}
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/*
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* XDR release functions
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*/
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static int nfs3svc_release_getacl(struct svc_rqst *rqstp, __be32 *p,
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struct nfsd3_getaclres *resp)
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{
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fh_put(&resp->fh);
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posix_acl_release(resp->acl_access);
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posix_acl_release(resp->acl_default);
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return 1;
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}
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#define nfs3svc_decode_voidargs NULL
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#define nfs3svc_release_void NULL
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#define nfsd3_setaclres nfsd3_attrstat
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#define nfsd3_voidres nfsd3_voidargs
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struct nfsd3_voidargs { int dummy; };
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#define PROC(name, argt, rest, relt, cache, respsize) \
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{ (svc_procfunc) nfsd3_proc_##name, \
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(kxdrproc_t) nfs3svc_decode_##argt##args, \
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(kxdrproc_t) nfs3svc_encode_##rest##res, \
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(kxdrproc_t) nfs3svc_release_##relt, \
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sizeof(struct nfsd3_##argt##args), \
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sizeof(struct nfsd3_##rest##res), \
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0, \
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cache, \
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respsize, \
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}
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#define ST 1 /* status*/
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#define AT 21 /* attributes */
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#define pAT (1+AT) /* post attributes - conditional */
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#define ACL (1+NFS_ACL_MAX_ENTRIES*3) /* Access Control List */
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static struct svc_procedure nfsd_acl_procedures3[] = {
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PROC(null, void, void, void, RC_NOCACHE, ST),
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PROC(getacl, getacl, getacl, getacl, RC_NOCACHE, ST+1+2*(1+ACL)),
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PROC(setacl, setacl, setacl, fhandle, RC_NOCACHE, ST+pAT),
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};
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struct svc_version nfsd_acl_version3 = {
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.vs_vers = 3,
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.vs_nproc = 3,
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.vs_proc = nfsd_acl_procedures3,
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.vs_dispatch = nfsd_dispatch,
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.vs_xdrsize = NFS3_SVC_XDRSIZE,
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.vs_hidden = 0,
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};
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