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393 lines
9.4 KiB
393 lines
9.4 KiB
// SPDX-License-Identifier: GPL-2.0 |
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/* |
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* Process version 2 NFSACL requests. |
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* |
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* Copyright (C) 2002-2003 Andreas Gruenbacher <[email protected]> |
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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 NFSDDBG_FACILITY NFSDDBG_PROC |
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/* |
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* NULL call. |
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*/ |
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static __be32 |
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nfsacld_proc_null(struct svc_rqst *rqstp) |
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{ |
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return rpc_success; |
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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 nfsacld_proc_getacl(struct svc_rqst *rqstp) |
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{ |
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struct nfsd3_getaclargs *argp = rqstp->rq_argp; |
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struct nfsd3_getaclres *resp = rqstp->rq_resp; |
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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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dprintk("nfsd: GETACL(2acl) %s\n", SVCFH_fmt(&argp->fh)); |
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fh = fh_copy(&resp->fh, &argp->fh); |
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resp->status = fh_verify(rqstp, &resp->fh, 0, NFSD_MAY_NOP); |
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if (resp->status != nfs_ok) |
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goto out; |
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inode = d_inode(fh->fh_dentry); |
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if (argp->mask & ~NFS_ACL_MASK) { |
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resp->status = nfserr_inval; |
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goto out; |
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} |
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resp->mask = argp->mask; |
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resp->status = fh_getattr(fh, &resp->stat); |
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if (resp->status != nfs_ok) |
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goto out; |
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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 (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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if (IS_ERR(acl)) { |
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resp->status = nfserrno(PTR_ERR(acl)); |
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goto fail; |
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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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resp->status = 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 nfssvc_release_getacl. */ |
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out: |
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return rpc_success; |
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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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goto out; |
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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 nfsacld_proc_setacl(struct svc_rqst *rqstp) |
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{ |
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struct nfsd3_setaclargs *argp = rqstp->rq_argp; |
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struct nfsd_attrstat *resp = rqstp->rq_resp; |
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struct inode *inode; |
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svc_fh *fh; |
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int error; |
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dprintk("nfsd: SETACL(2acl) %s\n", SVCFH_fmt(&argp->fh)); |
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fh = fh_copy(&resp->fh, &argp->fh); |
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resp->status = fh_verify(rqstp, &resp->fh, 0, NFSD_MAY_SATTR); |
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if (resp->status != nfs_ok) |
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goto out; |
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inode = d_inode(fh->fh_dentry); |
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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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fh_lock(fh); |
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error = set_posix_acl(&init_user_ns, inode, ACL_TYPE_ACCESS, |
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argp->acl_access); |
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if (error) |
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goto out_drop_lock; |
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error = set_posix_acl(&init_user_ns, inode, ACL_TYPE_DEFAULT, |
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argp->acl_default); |
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if (error) |
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goto out_drop_lock; |
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fh_unlock(fh); |
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fh_drop_write(fh); |
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resp->status = fh_getattr(fh, &resp->stat); |
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out: |
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/* argp->acl_{access,default} may have been allocated in |
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nfssvc_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 rpc_success; |
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out_drop_lock: |
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fh_unlock(fh); |
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fh_drop_write(fh); |
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out_errno: |
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resp->status = nfserrno(error); |
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goto out; |
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} |
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/* |
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* Check file attributes |
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*/ |
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static __be32 nfsacld_proc_getattr(struct svc_rqst *rqstp) |
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{ |
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struct nfsd_fhandle *argp = rqstp->rq_argp; |
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struct nfsd_attrstat *resp = rqstp->rq_resp; |
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dprintk("nfsd: GETATTR %s\n", SVCFH_fmt(&argp->fh)); |
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fh_copy(&resp->fh, &argp->fh); |
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resp->status = fh_verify(rqstp, &resp->fh, 0, NFSD_MAY_NOP); |
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if (resp->status != nfs_ok) |
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goto out; |
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resp->status = fh_getattr(&resp->fh, &resp->stat); |
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out: |
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return rpc_success; |
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} |
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/* |
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* Check file access |
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*/ |
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static __be32 nfsacld_proc_access(struct svc_rqst *rqstp) |
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{ |
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struct nfsd3_accessargs *argp = rqstp->rq_argp; |
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struct nfsd3_accessres *resp = rqstp->rq_resp; |
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dprintk("nfsd: ACCESS(2acl) %s 0x%x\n", |
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SVCFH_fmt(&argp->fh), |
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argp->access); |
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fh_copy(&resp->fh, &argp->fh); |
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resp->access = argp->access; |
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resp->status = nfsd_access(rqstp, &resp->fh, &resp->access, NULL); |
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if (resp->status != nfs_ok) |
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goto out; |
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resp->status = fh_getattr(&resp->fh, &resp->stat); |
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out: |
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return rpc_success; |
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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 nfsaclsvc_decode_getaclargs(struct svc_rqst *rqstp, __be32 *p) |
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{ |
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struct xdr_stream *xdr = &rqstp->rq_arg_stream; |
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struct nfsd3_getaclargs *argp = rqstp->rq_argp; |
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if (!svcxdr_decode_fhandle(xdr, &argp->fh)) |
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return 0; |
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if (xdr_stream_decode_u32(xdr, &argp->mask) < 0) |
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return 0; |
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return 1; |
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} |
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static int nfsaclsvc_decode_setaclargs(struct svc_rqst *rqstp, __be32 *p) |
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{ |
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struct xdr_stream *xdr = &rqstp->rq_arg_stream; |
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struct nfsd3_setaclargs *argp = rqstp->rq_argp; |
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if (!svcxdr_decode_fhandle(xdr, &argp->fh)) |
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return 0; |
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if (xdr_stream_decode_u32(xdr, &argp->mask) < 0) |
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return 0; |
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if (argp->mask & ~NFS_ACL_MASK) |
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return 0; |
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if (!nfs_stream_decode_acl(xdr, NULL, (argp->mask & NFS_ACL) ? |
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&argp->acl_access : NULL)) |
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return 0; |
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if (!nfs_stream_decode_acl(xdr, NULL, (argp->mask & NFS_DFACL) ? |
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&argp->acl_default : NULL)) |
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return 0; |
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return 1; |
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} |
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static int nfsaclsvc_decode_accessargs(struct svc_rqst *rqstp, __be32 *p) |
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{ |
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struct xdr_stream *xdr = &rqstp->rq_arg_stream; |
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struct nfsd3_accessargs *args = rqstp->rq_argp; |
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if (!svcxdr_decode_fhandle(xdr, &args->fh)) |
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return 0; |
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if (xdr_stream_decode_u32(xdr, &args->access) < 0) |
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return 0; |
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return 1; |
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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 nfsaclsvc_encode_getaclres(struct svc_rqst *rqstp, __be32 *p) |
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{ |
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struct xdr_stream *xdr = &rqstp->rq_res_stream; |
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struct nfsd3_getaclres *resp = rqstp->rq_resp; |
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struct dentry *dentry = resp->fh.fh_dentry; |
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struct inode *inode; |
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int w; |
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if (!svcxdr_encode_stat(xdr, resp->status)) |
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return 0; |
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if (dentry == NULL || d_really_is_negative(dentry)) |
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return 1; |
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inode = d_inode(dentry); |
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if (!svcxdr_encode_fattr(rqstp, xdr, &resp->fh, &resp->stat)) |
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return 0; |
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if (xdr_stream_encode_u32(xdr, resp->mask) < 0) |
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return 0; |
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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 1; |
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w -= PAGE_SIZE; |
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} |
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if (!nfs_stream_encode_acl(xdr, inode, resp->acl_access, |
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resp->mask & NFS_ACL, 0)) |
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return 0; |
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if (!nfs_stream_encode_acl(xdr, inode, resp->acl_default, |
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resp->mask & NFS_DFACL, NFS_ACL_DEFAULT)) |
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return 0; |
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return 1; |
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} |
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/* ACCESS */ |
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static int nfsaclsvc_encode_accessres(struct svc_rqst *rqstp, __be32 *p) |
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{ |
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struct xdr_stream *xdr = &rqstp->rq_res_stream; |
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struct nfsd3_accessres *resp = rqstp->rq_resp; |
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if (!svcxdr_encode_stat(xdr, resp->status)) |
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return 0; |
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switch (resp->status) { |
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case nfs_ok: |
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if (!svcxdr_encode_fattr(rqstp, xdr, &resp->fh, &resp->stat)) |
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return 0; |
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if (xdr_stream_encode_u32(xdr, resp->access) < 0) |
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return 0; |
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break; |
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} |
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return 1; |
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} |
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/* |
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* XDR release functions |
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*/ |
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static void nfsaclsvc_release_getacl(struct svc_rqst *rqstp) |
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{ |
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struct nfsd3_getaclres *resp = rqstp->rq_resp; |
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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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} |
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static void nfsaclsvc_release_access(struct svc_rqst *rqstp) |
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{ |
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struct nfsd3_accessres *resp = rqstp->rq_resp; |
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fh_put(&resp->fh); |
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} |
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struct nfsd3_voidargs { int dummy; }; |
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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 const struct svc_procedure nfsd_acl_procedures2[5] = { |
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[ACLPROC2_NULL] = { |
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.pc_func = nfsacld_proc_null, |
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.pc_decode = nfssvc_decode_voidarg, |
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.pc_encode = nfssvc_encode_voidres, |
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.pc_argsize = sizeof(struct nfsd_voidargs), |
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.pc_ressize = sizeof(struct nfsd_voidres), |
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.pc_cachetype = RC_NOCACHE, |
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.pc_xdrressize = ST, |
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.pc_name = "NULL", |
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}, |
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[ACLPROC2_GETACL] = { |
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.pc_func = nfsacld_proc_getacl, |
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.pc_decode = nfsaclsvc_decode_getaclargs, |
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.pc_encode = nfsaclsvc_encode_getaclres, |
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.pc_release = nfsaclsvc_release_getacl, |
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.pc_argsize = sizeof(struct nfsd3_getaclargs), |
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.pc_ressize = sizeof(struct nfsd3_getaclres), |
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.pc_cachetype = RC_NOCACHE, |
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.pc_xdrressize = ST+1+2*(1+ACL), |
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.pc_name = "GETACL", |
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}, |
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[ACLPROC2_SETACL] = { |
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.pc_func = nfsacld_proc_setacl, |
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.pc_decode = nfsaclsvc_decode_setaclargs, |
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.pc_encode = nfssvc_encode_attrstatres, |
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.pc_release = nfssvc_release_attrstat, |
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.pc_argsize = sizeof(struct nfsd3_setaclargs), |
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.pc_ressize = sizeof(struct nfsd_attrstat), |
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.pc_cachetype = RC_NOCACHE, |
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.pc_xdrressize = ST+AT, |
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.pc_name = "SETACL", |
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}, |
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[ACLPROC2_GETATTR] = { |
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.pc_func = nfsacld_proc_getattr, |
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.pc_decode = nfssvc_decode_fhandleargs, |
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.pc_encode = nfssvc_encode_attrstatres, |
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.pc_release = nfssvc_release_attrstat, |
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.pc_argsize = sizeof(struct nfsd_fhandle), |
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.pc_ressize = sizeof(struct nfsd_attrstat), |
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.pc_cachetype = RC_NOCACHE, |
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.pc_xdrressize = ST+AT, |
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.pc_name = "GETATTR", |
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}, |
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[ACLPROC2_ACCESS] = { |
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.pc_func = nfsacld_proc_access, |
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.pc_decode = nfsaclsvc_decode_accessargs, |
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.pc_encode = nfsaclsvc_encode_accessres, |
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.pc_release = nfsaclsvc_release_access, |
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.pc_argsize = sizeof(struct nfsd3_accessargs), |
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.pc_ressize = sizeof(struct nfsd3_accessres), |
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.pc_cachetype = RC_NOCACHE, |
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.pc_xdrressize = ST+AT+1, |
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.pc_name = "SETATTR", |
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}, |
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}; |
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static unsigned int nfsd_acl_count2[ARRAY_SIZE(nfsd_acl_procedures2)]; |
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const struct svc_version nfsd_acl_version2 = { |
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.vs_vers = 2, |
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.vs_nproc = 5, |
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.vs_proc = nfsd_acl_procedures2, |
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.vs_count = nfsd_acl_count2, |
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.vs_dispatch = nfsd_dispatch, |
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.vs_xdrsize = NFS3_SVC_XDRSIZE, |
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};
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