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-rw-r--r--fs/nfsd/nfs2acl.c336
1 files changed, 336 insertions, 0 deletions
diff --git a/fs/nfsd/nfs2acl.c b/fs/nfsd/nfs2acl.c
new file mode 100644
index 000000000000..7cbf0682b2f0
--- /dev/null
+++ b/fs/nfsd/nfs2acl.c
@@ -0,0 +1,336 @@
+/*
+ * linux/fs/nfsd/nfsacl.c
+ *
+ * Process version 2 NFSACL requests.
+ *
+ * Copyright (C) 2002-2003 Andreas Gruenbacher <agruen@suse.de>
+ */
+
+#include <linux/sunrpc/svc.h>
+#include <linux/nfs.h>
+#include <linux/nfsd/nfsd.h>
+#include <linux/nfsd/cache.h>
+#include <linux/nfsd/xdr.h>
+#include <linux/nfsd/xdr3.h>
+#include <linux/posix_acl.h>
+#include <linux/nfsacl.h>
+
+#define NFSDDBG_FACILITY NFSDDBG_PROC
+#define RETURN_STATUS(st) { resp->status = (st); return (st); }
+
+/*
+ * NULL call.
+ */
+static int
+nfsacld_proc_null(struct svc_rqst *rqstp, void *argp, void *resp)
+{
+ return nfs_ok;
+}
+
+/*
+ * Get the Access and/or Default ACL of a file.
+ */
+static int nfsacld_proc_getacl(struct svc_rqst * rqstp,
+ struct nfsd3_getaclargs *argp, struct nfsd3_getaclres *resp)
+{
+ svc_fh *fh;
+ struct posix_acl *acl;
+ int nfserr = 0;
+
+ dprintk("nfsd: GETACL(2acl) %s\n", SVCFH_fmt(&argp->fh));
+
+ fh = fh_copy(&resp->fh, &argp->fh);
+ if ((nfserr = fh_verify(rqstp, &resp->fh, 0, MAY_NOP)))
+ RETURN_STATUS(nfserr_inval);
+
+ if (argp->mask & ~(NFS_ACL|NFS_ACLCNT|NFS_DFACL|NFS_DFACLCNT))
+ RETURN_STATUS(nfserr_inval);
+ resp->mask = argp->mask;
+
+ if (resp->mask & (NFS_ACL|NFS_ACLCNT)) {
+ acl = nfsd_get_posix_acl(fh, ACL_TYPE_ACCESS);
+ if (IS_ERR(acl)) {
+ int err = PTR_ERR(acl);
+
+ if (err == -ENODATA || err == -EOPNOTSUPP)
+ acl = NULL;
+ else {
+ nfserr = nfserrno(err);
+ goto fail;
+ }
+ }
+ if (acl == NULL) {
+ /* Solaris returns the inode's minimum ACL. */
+
+ struct inode *inode = fh->fh_dentry->d_inode;
+ acl = posix_acl_from_mode(inode->i_mode, GFP_KERNEL);
+ }
+ 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 = nfsd_get_posix_acl(fh, ACL_TYPE_DEFAULT);
+ if (IS_ERR(acl)) {
+ int err = PTR_ERR(acl);
+
+ if (err == -ENODATA || err == -EOPNOTSUPP)
+ acl = NULL;
+ else {
+ nfserr = nfserrno(err);
+ goto fail;
+ }
+ }
+ resp->acl_default = acl;
+ }
+
+ /* resp->acl_{access,default} are released in nfssvc_release_getacl. */
+ RETURN_STATUS(0);
+
+fail:
+ posix_acl_release(resp->acl_access);
+ posix_acl_release(resp->acl_default);
+ RETURN_STATUS(nfserr);
+}
+
+/*
+ * Set the Access and/or Default ACL of a file.
+ */
+static int nfsacld_proc_setacl(struct svc_rqst * rqstp,
+ struct nfsd3_setaclargs *argp,
+ struct nfsd_attrstat *resp)
+{
+ svc_fh *fh;
+ int nfserr = 0;
+
+ dprintk("nfsd: SETACL(2acl) %s\n", SVCFH_fmt(&argp->fh));
+
+ fh = fh_copy(&resp->fh, &argp->fh);
+ nfserr = fh_verify(rqstp, &resp->fh, 0, MAY_NOP);
+
+ if (!nfserr) {
+ nfserr = nfserrno( nfsd_set_posix_acl(
+ fh, ACL_TYPE_ACCESS, argp->acl_access) );
+ }
+ if (!nfserr) {
+ nfserr = nfserrno( nfsd_set_posix_acl(
+ fh, ACL_TYPE_DEFAULT, argp->acl_default) );
+ }
+
+ /* 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 nfserr;
+}
+
+/*
+ * Check file attributes
+ */
+static int nfsacld_proc_getattr(struct svc_rqst * rqstp,
+ struct nfsd_fhandle *argp, struct nfsd_attrstat *resp)
+{
+ dprintk("nfsd: GETATTR %s\n", SVCFH_fmt(&argp->fh));
+
+ fh_copy(&resp->fh, &argp->fh);
+ return fh_verify(rqstp, &resp->fh, 0, MAY_NOP);
+}
+
+/*
+ * Check file access
+ */
+static int nfsacld_proc_access(struct svc_rqst *rqstp, struct nfsd3_accessargs *argp,
+ struct nfsd3_accessres *resp)
+{
+ int nfserr;
+
+ dprintk("nfsd: ACCESS(2acl) %s 0x%x\n",
+ SVCFH_fmt(&argp->fh),
+ argp->access);
+
+ fh_copy(&resp->fh, &argp->fh);
+ resp->access = argp->access;
+ nfserr = nfsd_access(rqstp, &resp->fh, &resp->access, NULL);
+ return nfserr;
+}
+
+/*
+ * XDR decode functions
+ */
+static int nfsaclsvc_decode_getaclargs(struct svc_rqst *rqstp, u32 *p,
+ struct nfsd3_getaclargs *argp)
+{
+ if (!(p = nfs2svc_decode_fh(p, &argp->fh)))
+ return 0;
+ argp->mask = ntohl(*p); p++;
+
+ return xdr_argsize_check(rqstp, p);
+}
+
+
+static int nfsaclsvc_decode_setaclargs(struct svc_rqst *rqstp, u32 *p,
+ struct nfsd3_setaclargs *argp)
+{
+ struct kvec *head = rqstp->rq_arg.head;
+ unsigned int base;
+ int n;
+
+ if (!(p = nfs2svc_decode_fh(p, &argp->fh)))
+ return 0;
+ argp->mask = ntohl(*p++);
+ if (argp->mask & ~(NFS_ACL|NFS_ACLCNT|NFS_DFACL|NFS_DFACLCNT) ||
+ !xdr_argsize_check(rqstp, p))
+ return 0;
+
+ base = (char *)p - (char *)head->iov_base;
+ n = nfsacl_decode(&rqstp->rq_arg, base, NULL,
+ (argp->mask & NFS_ACL) ?
+ &argp->acl_access : NULL);
+ if (n > 0)
+ n = nfsacl_decode(&rqstp->rq_arg, base + n, NULL,
+ (argp->mask & NFS_DFACL) ?
+ &argp->acl_default : NULL);
+ return (n > 0);
+}
+
+static int nfsaclsvc_decode_fhandleargs(struct svc_rqst *rqstp, u32 *p,
+ struct nfsd_fhandle *argp)
+{
+ if (!(p = nfs2svc_decode_fh(p, &argp->fh)))
+ return 0;
+ return xdr_argsize_check(rqstp, p);
+}
+
+static int nfsaclsvc_decode_accessargs(struct svc_rqst *rqstp, u32 *p,
+ struct nfsd3_accessargs *argp)
+{
+ if (!(p = nfs2svc_decode_fh(p, &argp->fh)))
+ return 0;
+ argp->access = ntohl(*p++);
+
+ return xdr_argsize_check(rqstp, p);
+}
+
+/*
+ * XDR encode functions
+ */
+
+/* GETACL */
+static int nfsaclsvc_encode_getaclres(struct svc_rqst *rqstp, u32 *p,
+ struct nfsd3_getaclres *resp)
+{
+ struct dentry *dentry = resp->fh.fh_dentry;
+ struct inode *inode = dentry->d_inode;
+ int w = nfsacl_size(
+ (resp->mask & NFS_ACL) ? resp->acl_access : NULL,
+ (resp->mask & NFS_DFACL) ? resp->acl_default : NULL);
+ struct kvec *head = rqstp->rq_res.head;
+ unsigned int base;
+ int n;
+
+ if (dentry == NULL || dentry->d_inode == NULL)
+ return 0;
+ inode = dentry->d_inode;
+
+ p = nfs2svc_encode_fattr(rqstp, p, &resp->fh);
+ *p++ = htonl(resp->mask);
+ if (!xdr_ressize_check(rqstp, p))
+ return 0;
+ base = (char *)p - (char *)head->iov_base;
+
+ rqstp->rq_res.page_len = w;
+ while (w > 0) {
+ if (!svc_take_res_page(rqstp))
+ return 0;
+ w -= PAGE_SIZE;
+ }
+
+ n = nfsacl_encode(&rqstp->rq_res, base, inode,
+ resp->acl_access,
+ resp->mask & NFS_ACL, 0);
+ if (n > 0)
+ n = nfsacl_encode(&rqstp->rq_res, base + n, inode,
+ resp->acl_default,
+ resp->mask & NFS_DFACL,
+ NFS_ACL_DEFAULT);
+ if (n <= 0)
+ return 0;
+ return 1;
+}
+
+static int nfsaclsvc_encode_attrstatres(struct svc_rqst *rqstp, u32 *p,
+ struct nfsd_attrstat *resp)
+{
+ p = nfs2svc_encode_fattr(rqstp, p, &resp->fh);
+ return xdr_ressize_check(rqstp, p);
+}
+
+/* ACCESS */
+static int nfsaclsvc_encode_accessres(struct svc_rqst *rqstp, u32 *p,
+ struct nfsd3_accessres *resp)
+{
+ p = nfs2svc_encode_fattr(rqstp, p, &resp->fh);
+ *p++ = htonl(resp->access);
+ return xdr_ressize_check(rqstp, p);
+}
+
+/*
+ * XDR release functions
+ */
+static int nfsaclsvc_release_getacl(struct svc_rqst *rqstp, u32 *p,
+ struct nfsd3_getaclres *resp)
+{
+ fh_put(&resp->fh);
+ posix_acl_release(resp->acl_access);
+ posix_acl_release(resp->acl_default);
+ return 1;
+}
+
+static int nfsaclsvc_release_fhandle(struct svc_rqst *rqstp, u32 *p,
+ struct nfsd_fhandle *resp)
+{
+ fh_put(&resp->fh);
+ return 1;
+}
+
+#define nfsaclsvc_decode_voidargs NULL
+#define nfsaclsvc_encode_voidres NULL
+#define nfsaclsvc_release_void NULL
+#define nfsd3_fhandleargs nfsd_fhandle
+#define nfsd3_attrstatres nfsd_attrstat
+#define nfsd3_voidres nfsd3_voidargs
+struct nfsd3_voidargs { int dummy; };
+
+#define PROC(name, argt, rest, relt, cache, respsize) \
+ { (svc_procfunc) nfsacld_proc_##name, \
+ (kxdrproc_t) nfsaclsvc_decode_##argt##args, \
+ (kxdrproc_t) nfsaclsvc_encode_##rest##res, \
+ (kxdrproc_t) nfsaclsvc_release_##relt, \
+ sizeof(struct nfsd3_##argt##args), \
+ sizeof(struct nfsd3_##rest##res), \
+ 0, \
+ cache, \
+ respsize, \
+ }
+
+#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 struct svc_procedure nfsd_acl_procedures2[] = {
+ PROC(null, void, void, void, RC_NOCACHE, ST),
+ PROC(getacl, getacl, getacl, getacl, RC_NOCACHE, ST+1+2*(1+ACL)),
+ PROC(setacl, setacl, attrstat, fhandle, RC_NOCACHE, ST+AT),
+ PROC(getattr, fhandle, attrstat, fhandle, RC_NOCACHE, ST+AT),
+ PROC(access, access, access, fhandle, RC_NOCACHE, ST+AT+1),
+};
+
+struct svc_version nfsd_acl_version2 = {
+ .vs_vers = 2,
+ .vs_nproc = 5,
+ .vs_proc = nfsd_acl_procedures2,
+ .vs_dispatch = nfsd_dispatch,
+ .vs_xdrsize = NFS3_SVC_XDRSIZE,
+};