| // SPDX-License-Identifier: GPL-2.0 |
| /* |
| * Process version 2 NFSACL requests. |
| * |
| * Copyright (C) 2002-2003 Andreas Gruenbacher <agruen@suse.de> |
| */ |
| |
| #include "nfsd.h" |
| /* FIXME: nfsacl.h is a broken header */ |
| #include <linux/nfsacl.h> |
| #include <linux/gfp.h> |
| #include "cache.h" |
| #include "xdr3.h" |
| #include "vfs.h" |
| |
| #define NFSDDBG_FACILITY NFSDDBG_PROC |
| |
| /* |
| * NULL call. |
| */ |
| static __be32 |
| nfsacld_proc_null(struct svc_rqst *rqstp) |
| { |
| return rpc_success; |
| } |
| |
| /* |
| * Get the Access and/or Default ACL of a file. |
| */ |
| static __be32 nfsacld_proc_getacl(struct svc_rqst *rqstp) |
| { |
| struct nfsd3_getaclargs *argp = rqstp->rq_argp; |
| struct nfsd3_getaclres *resp = rqstp->rq_resp; |
| struct posix_acl *acl; |
| struct inode *inode; |
| svc_fh *fh; |
| |
| dprintk("nfsd: GETACL(2acl) %s\n", SVCFH_fmt(&argp->fh)); |
| |
| fh = fh_copy(&resp->fh, &argp->fh); |
| resp->status = fh_verify(rqstp, &resp->fh, 0, NFSD_MAY_NOP); |
| if (resp->status != nfs_ok) |
| goto out; |
| |
| inode = d_inode(fh->fh_dentry); |
| |
| if (argp->mask & ~NFS_ACL_MASK) { |
| resp->status = nfserr_inval; |
| goto out; |
| } |
| resp->mask = argp->mask; |
| |
| resp->status = fh_getattr(fh, &resp->stat); |
| if (resp->status != nfs_ok) |
| goto out; |
| |
| if (resp->mask & (NFS_ACL|NFS_ACLCNT)) { |
| acl = get_acl(inode, ACL_TYPE_ACCESS); |
| if (acl == NULL) { |
| /* Solaris returns the inode's minimum ACL. */ |
| acl = posix_acl_from_mode(inode->i_mode, GFP_KERNEL); |
| } |
| if (IS_ERR(acl)) { |
| resp->status = nfserrno(PTR_ERR(acl)); |
| goto fail; |
| } |
| resp->acl_access = acl; |
| } |
| if (resp->mask & (NFS_DFACL|NFS_DFACLCNT)) { |
| /* Check how Solaris handles requests for the Default ACL |
| of a non-directory! */ |
| acl = get_acl(inode, ACL_TYPE_DEFAULT); |
| if (IS_ERR(acl)) { |
| resp->status = nfserrno(PTR_ERR(acl)); |
| goto fail; |
| } |
| resp->acl_default = acl; |
| } |
| |
| /* resp->acl_{access,default} are released in nfssvc_release_getacl. */ |
| out: |
| return rpc_success; |
| |
| fail: |
| posix_acl_release(resp->acl_access); |
| posix_acl_release(resp->acl_default); |
| goto out; |
| } |
| |
| /* |
| * Set the Access and/or Default ACL of a file. |
| */ |
| static __be32 nfsacld_proc_setacl(struct svc_rqst *rqstp) |
| { |
| struct nfsd3_setaclargs *argp = rqstp->rq_argp; |
| struct nfsd_attrstat *resp = rqstp->rq_resp; |
| struct inode *inode; |
| svc_fh *fh; |
| int error; |
| |
| dprintk("nfsd: SETACL(2acl) %s\n", SVCFH_fmt(&argp->fh)); |
| |
| fh = fh_copy(&resp->fh, &argp->fh); |
| resp->status = fh_verify(rqstp, &resp->fh, 0, NFSD_MAY_SATTR); |
| if (resp->status != nfs_ok) |
| goto out; |
| |
| inode = d_inode(fh->fh_dentry); |
| |
| error = fh_want_write(fh); |
| if (error) |
| goto out_errno; |
| |
| fh_lock(fh); |
| |
| error = set_posix_acl(&init_user_ns, inode, ACL_TYPE_ACCESS, |
| argp->acl_access); |
| if (error) |
| goto out_drop_lock; |
| error = set_posix_acl(&init_user_ns, inode, ACL_TYPE_DEFAULT, |
| argp->acl_default); |
| if (error) |
| goto out_drop_lock; |
| |
| fh_unlock(fh); |
| |
| fh_drop_write(fh); |
| |
| resp->status = fh_getattr(fh, &resp->stat); |
| |
| out: |
| /* argp->acl_{access,default} may have been allocated in |
| nfssvc_decode_setaclargs. */ |
| posix_acl_release(argp->acl_access); |
| posix_acl_release(argp->acl_default); |
| return rpc_success; |
| |
| out_drop_lock: |
| fh_unlock(fh); |
| fh_drop_write(fh); |
| out_errno: |
| resp->status = nfserrno(error); |
| goto out; |
| } |
| |
| /* |
| * Check file attributes |
| */ |
| static __be32 nfsacld_proc_getattr(struct svc_rqst *rqstp) |
| { |
| struct nfsd_fhandle *argp = rqstp->rq_argp; |
| struct nfsd_attrstat *resp = rqstp->rq_resp; |
| |
| dprintk("nfsd: GETATTR %s\n", SVCFH_fmt(&argp->fh)); |
| |
| fh_copy(&resp->fh, &argp->fh); |
| resp->status = fh_verify(rqstp, &resp->fh, 0, NFSD_MAY_NOP); |
| if (resp->status != nfs_ok) |
| goto out; |
| resp->status = fh_getattr(&resp->fh, &resp->stat); |
| out: |
| return rpc_success; |
| } |
| |
| /* |
| * Check file access |
| */ |
| static __be32 nfsacld_proc_access(struct svc_rqst *rqstp) |
| { |
| struct nfsd3_accessargs *argp = rqstp->rq_argp; |
| struct nfsd3_accessres *resp = rqstp->rq_resp; |
| |
| dprintk("nfsd: ACCESS(2acl) %s 0x%x\n", |
| SVCFH_fmt(&argp->fh), |
| argp->access); |
| |
| fh_copy(&resp->fh, &argp->fh); |
| resp->access = argp->access; |
| resp->status = nfsd_access(rqstp, &resp->fh, &resp->access, NULL); |
| if (resp->status != nfs_ok) |
| goto out; |
| resp->status = fh_getattr(&resp->fh, &resp->stat); |
| out: |
| return rpc_success; |
| } |
| |
| /* |
| * XDR decode functions |
| */ |
| |
| static bool |
| nfsaclsvc_decode_getaclargs(struct svc_rqst *rqstp, struct xdr_stream *xdr) |
| { |
| struct nfsd3_getaclargs *argp = rqstp->rq_argp; |
| |
| if (!svcxdr_decode_fhandle(xdr, &argp->fh)) |
| return false; |
| if (xdr_stream_decode_u32(xdr, &argp->mask) < 0) |
| return false; |
| |
| return true; |
| } |
| |
| static bool |
| nfsaclsvc_decode_setaclargs(struct svc_rqst *rqstp, struct xdr_stream *xdr) |
| { |
| struct nfsd3_setaclargs *argp = rqstp->rq_argp; |
| |
| if (!svcxdr_decode_fhandle(xdr, &argp->fh)) |
| return false; |
| if (xdr_stream_decode_u32(xdr, &argp->mask) < 0) |
| return false; |
| if (argp->mask & ~NFS_ACL_MASK) |
| return false; |
| if (!nfs_stream_decode_acl(xdr, NULL, (argp->mask & NFS_ACL) ? |
| &argp->acl_access : NULL)) |
| return false; |
| if (!nfs_stream_decode_acl(xdr, NULL, (argp->mask & NFS_DFACL) ? |
| &argp->acl_default : NULL)) |
| return false; |
| |
| return true; |
| } |
| |
| static bool |
| nfsaclsvc_decode_accessargs(struct svc_rqst *rqstp, struct xdr_stream *xdr) |
| { |
| struct nfsd3_accessargs *args = rqstp->rq_argp; |
| |
| if (!svcxdr_decode_fhandle(xdr, &args->fh)) |
| return false; |
| if (xdr_stream_decode_u32(xdr, &args->access) < 0) |
| return false; |
| |
| return true; |
| } |
| |
| /* |
| * XDR encode functions |
| */ |
| |
| /* GETACL */ |
| static bool |
| nfsaclsvc_encode_getaclres(struct svc_rqst *rqstp, struct xdr_stream *xdr) |
| { |
| struct nfsd3_getaclres *resp = rqstp->rq_resp; |
| struct dentry *dentry = resp->fh.fh_dentry; |
| struct inode *inode; |
| int w; |
| |
| if (!svcxdr_encode_stat(xdr, resp->status)) |
| return 0; |
| |
| if (dentry == NULL || d_really_is_negative(dentry)) |
| return 1; |
| inode = d_inode(dentry); |
| |
| if (!svcxdr_encode_fattr(rqstp, xdr, &resp->fh, &resp->stat)) |
| return 0; |
| if (xdr_stream_encode_u32(xdr, resp->mask) < 0) |
| return 0; |
| |
| rqstp->rq_res.page_len = w = nfsacl_size( |
| (resp->mask & NFS_ACL) ? resp->acl_access : NULL, |
| (resp->mask & NFS_DFACL) ? resp->acl_default : NULL); |
| while (w > 0) { |
| if (!*(rqstp->rq_next_page++)) |
| return 1; |
| w -= PAGE_SIZE; |
| } |
| |
| if (!nfs_stream_encode_acl(xdr, inode, resp->acl_access, |
| resp->mask & NFS_ACL, 0)) |
| return 0; |
| if (!nfs_stream_encode_acl(xdr, inode, resp->acl_default, |
| resp->mask & NFS_DFACL, NFS_ACL_DEFAULT)) |
| return 0; |
| |
| return 1; |
| } |
| |
| /* ACCESS */ |
| static bool |
| nfsaclsvc_encode_accessres(struct svc_rqst *rqstp, struct xdr_stream *xdr) |
| { |
| struct nfsd3_accessres *resp = rqstp->rq_resp; |
| |
| if (!svcxdr_encode_stat(xdr, resp->status)) |
| return 0; |
| switch (resp->status) { |
| case nfs_ok: |
| if (!svcxdr_encode_fattr(rqstp, xdr, &resp->fh, &resp->stat)) |
| return 0; |
| if (xdr_stream_encode_u32(xdr, resp->access) < 0) |
| return 0; |
| break; |
| } |
| |
| return 1; |
| } |
| |
| /* |
| * XDR release functions |
| */ |
| static void nfsaclsvc_release_getacl(struct svc_rqst *rqstp) |
| { |
| struct nfsd3_getaclres *resp = rqstp->rq_resp; |
| |
| fh_put(&resp->fh); |
| posix_acl_release(resp->acl_access); |
| posix_acl_release(resp->acl_default); |
| } |
| |
| static void nfsaclsvc_release_access(struct svc_rqst *rqstp) |
| { |
| struct nfsd3_accessres *resp = rqstp->rq_resp; |
| |
| fh_put(&resp->fh); |
| } |
| |
| struct nfsd3_voidargs { int dummy; }; |
| |
| #define ST 1 /* status*/ |
| #define AT 21 /* attributes */ |
| #define pAT (1+AT) /* post attributes - conditional */ |
| #define ACL (1+NFS_ACL_MAX_ENTRIES*3) /* Access Control List */ |
| |
| static const struct svc_procedure nfsd_acl_procedures2[5] = { |
| [ACLPROC2_NULL] = { |
| .pc_func = nfsacld_proc_null, |
| .pc_decode = nfssvc_decode_voidarg, |
| .pc_encode = nfssvc_encode_voidres, |
| .pc_argsize = sizeof(struct nfsd_voidargs), |
| .pc_ressize = sizeof(struct nfsd_voidres), |
| .pc_cachetype = RC_NOCACHE, |
| .pc_xdrressize = ST, |
| .pc_name = "NULL", |
| }, |
| [ACLPROC2_GETACL] = { |
| .pc_func = nfsacld_proc_getacl, |
| .pc_decode = nfsaclsvc_decode_getaclargs, |
| .pc_encode = nfsaclsvc_encode_getaclres, |
| .pc_release = nfsaclsvc_release_getacl, |
| .pc_argsize = sizeof(struct nfsd3_getaclargs), |
| .pc_ressize = sizeof(struct nfsd3_getaclres), |
| .pc_cachetype = RC_NOCACHE, |
| .pc_xdrressize = ST+1+2*(1+ACL), |
| .pc_name = "GETACL", |
| }, |
| [ACLPROC2_SETACL] = { |
| .pc_func = nfsacld_proc_setacl, |
| .pc_decode = nfsaclsvc_decode_setaclargs, |
| .pc_encode = nfssvc_encode_attrstatres, |
| .pc_release = nfssvc_release_attrstat, |
| .pc_argsize = sizeof(struct nfsd3_setaclargs), |
| .pc_ressize = sizeof(struct nfsd_attrstat), |
| .pc_cachetype = RC_NOCACHE, |
| .pc_xdrressize = ST+AT, |
| .pc_name = "SETACL", |
| }, |
| [ACLPROC2_GETATTR] = { |
| .pc_func = nfsacld_proc_getattr, |
| .pc_decode = nfssvc_decode_fhandleargs, |
| .pc_encode = nfssvc_encode_attrstatres, |
| .pc_release = nfssvc_release_attrstat, |
| .pc_argsize = sizeof(struct nfsd_fhandle), |
| .pc_ressize = sizeof(struct nfsd_attrstat), |
| .pc_cachetype = RC_NOCACHE, |
| .pc_xdrressize = ST+AT, |
| .pc_name = "GETATTR", |
| }, |
| [ACLPROC2_ACCESS] = { |
| .pc_func = nfsacld_proc_access, |
| .pc_decode = nfsaclsvc_decode_accessargs, |
| .pc_encode = nfsaclsvc_encode_accessres, |
| .pc_release = nfsaclsvc_release_access, |
| .pc_argsize = sizeof(struct nfsd3_accessargs), |
| .pc_ressize = sizeof(struct nfsd3_accessres), |
| .pc_cachetype = RC_NOCACHE, |
| .pc_xdrressize = ST+AT+1, |
| .pc_name = "SETATTR", |
| }, |
| }; |
| |
| static unsigned int nfsd_acl_count2[ARRAY_SIZE(nfsd_acl_procedures2)]; |
| const struct svc_version nfsd_acl_version2 = { |
| .vs_vers = 2, |
| .vs_nproc = 5, |
| .vs_proc = nfsd_acl_procedures2, |
| .vs_count = nfsd_acl_count2, |
| .vs_dispatch = nfsd_dispatch, |
| .vs_xdrsize = NFS3_SVC_XDRSIZE, |
| }; |