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-rw-r--r--fs/nfsd/nfs3acl.c278
1 files changed, 278 insertions, 0 deletions
diff --git a/fs/nfsd/nfs3acl.c b/fs/nfsd/nfs3acl.c
new file mode 100644
index 000000000..a34a22e27
--- /dev/null
+++ b/fs/nfsd/nfs3acl.c
@@ -0,0 +1,278 @@
+// SPDX-License-Identifier: GPL-2.0
+/*
+ * Process version 3 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"
+
+/*
+ * NULL call.
+ */
+static __be32
+nfsd3_proc_null(struct svc_rqst *rqstp)
+{
+ return rpc_success;
+}
+
+/*
+ * Get the Access and/or Default ACL of a file.
+ */
+static __be32 nfsd3_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;
+
+ 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;
+
+ 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 nfs3svc_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 nfsd3_proc_setacl(struct svc_rqst *rqstp)
+{
+ struct nfsd3_setaclargs *argp = rqstp->rq_argp;
+ struct nfsd3_attrstat *resp = rqstp->rq_resp;
+ struct inode *inode;
+ svc_fh *fh;
+ int error;
+
+ 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;
+
+ inode_lock(inode);
+
+ 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);
+
+out_drop_lock:
+ inode_unlock(inode);
+ fh_drop_write(fh);
+out_errno:
+ resp->status = nfserrno(error);
+out:
+ /* argp->acl_{access,default} may have been allocated in
+ nfs3svc_decode_setaclargs. */
+ posix_acl_release(argp->acl_access);
+ posix_acl_release(argp->acl_default);
+ return rpc_success;
+}
+
+/*
+ * XDR decode functions
+ */
+
+static bool
+nfs3svc_decode_getaclargs(struct svc_rqst *rqstp, struct xdr_stream *xdr)
+{
+ struct nfsd3_getaclargs *args = rqstp->rq_argp;
+
+ if (!svcxdr_decode_nfs_fh3(xdr, &args->fh))
+ return false;
+ if (xdr_stream_decode_u32(xdr, &args->mask) < 0)
+ return false;
+
+ return true;
+}
+
+static bool
+nfs3svc_decode_setaclargs(struct svc_rqst *rqstp, struct xdr_stream *xdr)
+{
+ struct nfsd3_setaclargs *argp = rqstp->rq_argp;
+
+ if (!svcxdr_decode_nfs_fh3(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;
+}
+
+/*
+ * XDR encode functions
+ */
+
+/* GETACL */
+static bool
+nfs3svc_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;
+
+ if (!svcxdr_encode_nfsstat3(xdr, resp->status))
+ return false;
+ switch (resp->status) {
+ case nfs_ok:
+ inode = d_inode(dentry);
+ if (!svcxdr_encode_post_op_attr(rqstp, xdr, &resp->fh))
+ return false;
+ if (xdr_stream_encode_u32(xdr, resp->mask) < 0)
+ return false;
+
+ if (!nfs_stream_encode_acl(xdr, inode, resp->acl_access,
+ resp->mask & NFS_ACL, 0))
+ return false;
+ if (!nfs_stream_encode_acl(xdr, inode, resp->acl_default,
+ resp->mask & NFS_DFACL,
+ NFS_ACL_DEFAULT))
+ return false;
+ break;
+ default:
+ if (!svcxdr_encode_post_op_attr(rqstp, xdr, &resp->fh))
+ return false;
+ }
+
+ return true;
+}
+
+/* SETACL */
+static bool
+nfs3svc_encode_setaclres(struct svc_rqst *rqstp, struct xdr_stream *xdr)
+{
+ struct nfsd3_attrstat *resp = rqstp->rq_resp;
+
+ return svcxdr_encode_nfsstat3(xdr, resp->status) &&
+ svcxdr_encode_post_op_attr(rqstp, xdr, &resp->fh);
+}
+
+/*
+ * XDR release functions
+ */
+static void nfs3svc_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);
+}
+
+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_procedures3[3] = {
+ [ACLPROC3_NULL] = {
+ .pc_func = nfsd3_proc_null,
+ .pc_decode = nfssvc_decode_voidarg,
+ .pc_encode = nfssvc_encode_voidres,
+ .pc_argsize = sizeof(struct nfsd_voidargs),
+ .pc_argzero = sizeof(struct nfsd_voidargs),
+ .pc_ressize = sizeof(struct nfsd_voidres),
+ .pc_cachetype = RC_NOCACHE,
+ .pc_xdrressize = ST,
+ .pc_name = "NULL",
+ },
+ [ACLPROC3_GETACL] = {
+ .pc_func = nfsd3_proc_getacl,
+ .pc_decode = nfs3svc_decode_getaclargs,
+ .pc_encode = nfs3svc_encode_getaclres,
+ .pc_release = nfs3svc_release_getacl,
+ .pc_argsize = sizeof(struct nfsd3_getaclargs),
+ .pc_argzero = sizeof(struct nfsd3_getaclargs),
+ .pc_ressize = sizeof(struct nfsd3_getaclres),
+ .pc_cachetype = RC_NOCACHE,
+ .pc_xdrressize = ST+1+2*(1+ACL),
+ .pc_name = "GETACL",
+ },
+ [ACLPROC3_SETACL] = {
+ .pc_func = nfsd3_proc_setacl,
+ .pc_decode = nfs3svc_decode_setaclargs,
+ .pc_encode = nfs3svc_encode_setaclres,
+ .pc_release = nfs3svc_release_fhandle,
+ .pc_argsize = sizeof(struct nfsd3_setaclargs),
+ .pc_argzero = sizeof(struct nfsd3_setaclargs),
+ .pc_ressize = sizeof(struct nfsd3_attrstat),
+ .pc_cachetype = RC_NOCACHE,
+ .pc_xdrressize = ST+pAT,
+ .pc_name = "SETACL",
+ },
+};
+
+static unsigned int nfsd_acl_count3[ARRAY_SIZE(nfsd_acl_procedures3)];
+const struct svc_version nfsd_acl_version3 = {
+ .vs_vers = 3,
+ .vs_nproc = 3,
+ .vs_proc = nfsd_acl_procedures3,
+ .vs_count = nfsd_acl_count3,
+ .vs_dispatch = nfsd_dispatch,
+ .vs_xdrsize = NFS3_SVC_XDRSIZE,
+};
+
generated by cgit v1.2.3 (git 2.39.1) at 2024-11-05 05:40:01 +0000