[T106][ZXW-22]7520V3SCV2.01.01.02P42U09_VEC_V0.8_AP_VEC origin source commit
Change-Id: Ic6e05d89ecd62fc34f82b23dcf306c93764aec4b
diff --git a/ap/os/linux/linux-3.4.x/fs/nfsd/nfsxdr.c b/ap/os/linux/linux-3.4.x/fs/nfsd/nfsxdr.c
new file mode 100644
index 0000000..65ec595
--- /dev/null
+++ b/ap/os/linux/linux-3.4.x/fs/nfsd/nfsxdr.c
@@ -0,0 +1,545 @@
+/*
+ * XDR support for nfsd
+ *
+ * Copyright (C) 1995, 1996 Olaf Kirch <okir@monad.swb.de>
+ */
+
+#include "xdr.h"
+#include "auth.h"
+
+#define NFSDDBG_FACILITY NFSDDBG_XDR
+
+/*
+ * Mapping of S_IF* types to NFS file types
+ */
+static u32 nfs_ftypes[] = {
+ NFNON, NFCHR, NFCHR, NFBAD,
+ NFDIR, NFBAD, NFBLK, NFBAD,
+ NFREG, NFBAD, NFLNK, NFBAD,
+ NFSOCK, NFBAD, NFLNK, NFBAD,
+};
+
+
+/*
+ * XDR functions for basic NFS types
+ */
+static __be32 *
+decode_fh(__be32 *p, struct svc_fh *fhp)
+{
+ fh_init(fhp, NFS_FHSIZE);
+ memcpy(&fhp->fh_handle.fh_base, p, NFS_FHSIZE);
+ fhp->fh_handle.fh_size = NFS_FHSIZE;
+
+ /* FIXME: Look up export pointer here and verify
+ * Sun Secure RPC if requested */
+ return p + (NFS_FHSIZE >> 2);
+}
+
+/* Helper function for NFSv2 ACL code */
+__be32 *nfs2svc_decode_fh(__be32 *p, struct svc_fh *fhp)
+{
+ return decode_fh(p, fhp);
+}
+
+static __be32 *
+encode_fh(__be32 *p, struct svc_fh *fhp)
+{
+ memcpy(p, &fhp->fh_handle.fh_base, NFS_FHSIZE);
+ return p + (NFS_FHSIZE>> 2);
+}
+
+/*
+ * Decode a file name and make sure that the path contains
+ * no slashes or null bytes.
+ */
+static __be32 *
+decode_filename(__be32 *p, char **namp, unsigned int *lenp)
+{
+ char *name;
+ unsigned int i;
+
+ if ((p = xdr_decode_string_inplace(p, namp, lenp, NFS_MAXNAMLEN)) != NULL) {
+ for (i = 0, name = *namp; i < *lenp; i++, name++) {
+ if (*name == '\0' || *name == '/')
+ return NULL;
+ }
+ }
+
+ return p;
+}
+
+static __be32 *
+decode_pathname(__be32 *p, char **namp, unsigned int *lenp)
+{
+ char *name;
+ unsigned int i;
+
+ if ((p = xdr_decode_string_inplace(p, namp, lenp, NFS_MAXPATHLEN)) != NULL) {
+ for (i = 0, name = *namp; i < *lenp; i++, name++) {
+ if (*name == '\0')
+ return NULL;
+ }
+ }
+
+ return p;
+}
+
+static __be32 *
+decode_sattr(__be32 *p, struct iattr *iap)
+{
+ u32 tmp, tmp1;
+
+ iap->ia_valid = 0;
+
+ /* Sun client bug compatibility check: some sun clients seem to
+ * put 0xffff in the mode field when they mean 0xffffffff.
+ * Quoting the 4.4BSD nfs server code: Nah nah nah nah na nah.
+ */
+ if ((tmp = ntohl(*p++)) != (u32)-1 && tmp != 0xffff) {
+ iap->ia_valid |= ATTR_MODE;
+ iap->ia_mode = tmp;
+ }
+ if ((tmp = ntohl(*p++)) != (u32)-1) {
+ iap->ia_valid |= ATTR_UID;
+ iap->ia_uid = tmp;
+ }
+ if ((tmp = ntohl(*p++)) != (u32)-1) {
+ iap->ia_valid |= ATTR_GID;
+ iap->ia_gid = tmp;
+ }
+ if ((tmp = ntohl(*p++)) != (u32)-1) {
+ iap->ia_valid |= ATTR_SIZE;
+ iap->ia_size = tmp;
+ }
+ tmp = ntohl(*p++); tmp1 = ntohl(*p++);
+ if (tmp != (u32)-1 && tmp1 != (u32)-1) {
+ iap->ia_valid |= ATTR_ATIME | ATTR_ATIME_SET;
+ iap->ia_atime.tv_sec = tmp;
+ iap->ia_atime.tv_nsec = tmp1 * 1000;
+ }
+ tmp = ntohl(*p++); tmp1 = ntohl(*p++);
+ if (tmp != (u32)-1 && tmp1 != (u32)-1) {
+ iap->ia_valid |= ATTR_MTIME | ATTR_MTIME_SET;
+ iap->ia_mtime.tv_sec = tmp;
+ iap->ia_mtime.tv_nsec = tmp1 * 1000;
+ /*
+ * Passing the invalid value useconds=1000000 for mtime
+ * is a Sun convention for "set both mtime and atime to
+ * current server time". It's needed to make permissions
+ * checks for the "touch" program across v2 mounts to
+ * Solaris and Irix boxes work correctly. See description of
+ * sattr in section 6.1 of "NFS Illustrated" by
+ * Brent Callaghan, Addison-Wesley, ISBN 0-201-32750-5
+ */
+ if (tmp1 == 1000000)
+ iap->ia_valid &= ~(ATTR_ATIME_SET|ATTR_MTIME_SET);
+ }
+ return p;
+}
+
+static __be32 *
+encode_fattr(struct svc_rqst *rqstp, __be32 *p, struct svc_fh *fhp,
+ struct kstat *stat)
+{
+ struct dentry *dentry = fhp->fh_dentry;
+ int type;
+ struct timespec time;
+ u32 f;
+
+ type = (stat->mode & S_IFMT);
+
+ *p++ = htonl(nfs_ftypes[type >> 12]);
+ *p++ = htonl((u32) stat->mode);
+ *p++ = htonl((u32) stat->nlink);
+ *p++ = htonl((u32) nfsd_ruid(rqstp, stat->uid));
+ *p++ = htonl((u32) nfsd_rgid(rqstp, stat->gid));
+
+ if (S_ISLNK(type) && stat->size > NFS_MAXPATHLEN) {
+ *p++ = htonl(NFS_MAXPATHLEN);
+ } else {
+ *p++ = htonl((u32) stat->size);
+ }
+ *p++ = htonl((u32) stat->blksize);
+ if (S_ISCHR(type) || S_ISBLK(type))
+ *p++ = htonl(new_encode_dev(stat->rdev));
+ else
+ *p++ = htonl(0xffffffff);
+ *p++ = htonl((u32) stat->blocks);
+ switch (fsid_source(fhp)) {
+ default:
+ case FSIDSOURCE_DEV:
+ *p++ = htonl(new_encode_dev(stat->dev));
+ break;
+ case FSIDSOURCE_FSID:
+ *p++ = htonl((u32) fhp->fh_export->ex_fsid);
+ break;
+ case FSIDSOURCE_UUID:
+ f = ((u32*)fhp->fh_export->ex_uuid)[0];
+ f ^= ((u32*)fhp->fh_export->ex_uuid)[1];
+ f ^= ((u32*)fhp->fh_export->ex_uuid)[2];
+ f ^= ((u32*)fhp->fh_export->ex_uuid)[3];
+ *p++ = htonl(f);
+ break;
+ }
+ *p++ = htonl((u32) stat->ino);
+ *p++ = htonl((u32) stat->atime.tv_sec);
+ *p++ = htonl(stat->atime.tv_nsec ? stat->atime.tv_nsec / 1000 : 0);
+ lease_get_mtime(dentry->d_inode, &time);
+ *p++ = htonl((u32) time.tv_sec);
+ *p++ = htonl(time.tv_nsec ? time.tv_nsec / 1000 : 0);
+ *p++ = htonl((u32) stat->ctime.tv_sec);
+ *p++ = htonl(stat->ctime.tv_nsec ? stat->ctime.tv_nsec / 1000 : 0);
+
+ return p;
+}
+
+/* Helper function for NFSv2 ACL code */
+__be32 *nfs2svc_encode_fattr(struct svc_rqst *rqstp, __be32 *p, struct svc_fh *fhp)
+{
+ struct kstat stat;
+ vfs_getattr(fhp->fh_export->ex_path.mnt, fhp->fh_dentry, &stat);
+ return encode_fattr(rqstp, p, fhp, &stat);
+}
+
+/*
+ * XDR decode functions
+ */
+int
+nfssvc_decode_void(struct svc_rqst *rqstp, __be32 *p, void *dummy)
+{
+ return xdr_argsize_check(rqstp, p);
+}
+
+int
+nfssvc_decode_fhandle(struct svc_rqst *rqstp, __be32 *p, struct nfsd_fhandle *args)
+{
+ if (!(p = decode_fh(p, &args->fh)))
+ return 0;
+ return xdr_argsize_check(rqstp, p);
+}
+
+int
+nfssvc_decode_sattrargs(struct svc_rqst *rqstp, __be32 *p,
+ struct nfsd_sattrargs *args)
+{
+ p = decode_fh(p, &args->fh);
+ if (!p)
+ return 0;
+ p = decode_sattr(p, &args->attrs);
+
+ return xdr_argsize_check(rqstp, p);
+}
+
+int
+nfssvc_decode_diropargs(struct svc_rqst *rqstp, __be32 *p,
+ struct nfsd_diropargs *args)
+{
+ if (!(p = decode_fh(p, &args->fh))
+ || !(p = decode_filename(p, &args->name, &args->len)))
+ return 0;
+
+ return xdr_argsize_check(rqstp, p);
+}
+
+int
+nfssvc_decode_readargs(struct svc_rqst *rqstp, __be32 *p,
+ struct nfsd_readargs *args)
+{
+ unsigned int len;
+ int v,pn;
+ if (!(p = decode_fh(p, &args->fh)))
+ return 0;
+
+ args->offset = ntohl(*p++);
+ len = args->count = ntohl(*p++);
+ p++; /* totalcount - unused */
+
+ if (len > NFSSVC_MAXBLKSIZE_V2)
+ len = NFSSVC_MAXBLKSIZE_V2;
+
+ /* set up somewhere to store response.
+ * We take pages, put them on reslist and include in iovec
+ */
+ v=0;
+ while (len > 0) {
+ pn = rqstp->rq_resused++;
+ rqstp->rq_vec[v].iov_base = page_address(rqstp->rq_respages[pn]);
+ rqstp->rq_vec[v].iov_len = len < PAGE_SIZE?len:PAGE_SIZE;
+ len -= rqstp->rq_vec[v].iov_len;
+ v++;
+ }
+ args->vlen = v;
+ return xdr_argsize_check(rqstp, p);
+}
+
+int
+nfssvc_decode_writeargs(struct svc_rqst *rqstp, __be32 *p,
+ struct nfsd_writeargs *args)
+{
+ unsigned int len, hdr, dlen;
+ int v;
+
+ if (!(p = decode_fh(p, &args->fh)))
+ return 0;
+
+ p++; /* beginoffset */
+ args->offset = ntohl(*p++); /* offset */
+ p++; /* totalcount */
+ len = args->len = ntohl(*p++);
+ /*
+ * The protocol specifies a maximum of 8192 bytes.
+ */
+ if (len > NFSSVC_MAXBLKSIZE_V2)
+ return 0;
+
+ /*
+ * Check to make sure that we got the right number of
+ * bytes.
+ */
+ hdr = (void*)p - rqstp->rq_arg.head[0].iov_base;
+ dlen = rqstp->rq_arg.head[0].iov_len + rqstp->rq_arg.page_len
+ - hdr;
+
+ /*
+ * Round the length of the data which was specified up to
+ * the next multiple of XDR units and then compare that
+ * against the length which was actually received.
+ * Note that when RPCSEC/GSS (for example) is used, the
+ * data buffer can be padded so dlen might be larger
+ * than required. It must never be smaller.
+ */
+ if (dlen < XDR_QUADLEN(len)*4)
+ return 0;
+
+ rqstp->rq_vec[0].iov_base = (void*)p;
+ rqstp->rq_vec[0].iov_len = rqstp->rq_arg.head[0].iov_len - hdr;
+ v = 0;
+ while (len > rqstp->rq_vec[v].iov_len) {
+ len -= rqstp->rq_vec[v].iov_len;
+ v++;
+ rqstp->rq_vec[v].iov_base = page_address(rqstp->rq_pages[v]);
+ rqstp->rq_vec[v].iov_len = PAGE_SIZE;
+ }
+ rqstp->rq_vec[v].iov_len = len;
+ args->vlen = v + 1;
+ return 1;
+}
+
+int
+nfssvc_decode_createargs(struct svc_rqst *rqstp, __be32 *p,
+ struct nfsd_createargs *args)
+{
+ if ( !(p = decode_fh(p, &args->fh))
+ || !(p = decode_filename(p, &args->name, &args->len)))
+ return 0;
+ p = decode_sattr(p, &args->attrs);
+
+ return xdr_argsize_check(rqstp, p);
+}
+
+int
+nfssvc_decode_renameargs(struct svc_rqst *rqstp, __be32 *p,
+ struct nfsd_renameargs *args)
+{
+ if (!(p = decode_fh(p, &args->ffh))
+ || !(p = decode_filename(p, &args->fname, &args->flen))
+ || !(p = decode_fh(p, &args->tfh))
+ || !(p = decode_filename(p, &args->tname, &args->tlen)))
+ return 0;
+
+ return xdr_argsize_check(rqstp, p);
+}
+
+int
+nfssvc_decode_readlinkargs(struct svc_rqst *rqstp, __be32 *p, struct nfsd_readlinkargs *args)
+{
+ if (!(p = decode_fh(p, &args->fh)))
+ return 0;
+ args->buffer = page_address(rqstp->rq_respages[rqstp->rq_resused++]);
+
+ return xdr_argsize_check(rqstp, p);
+}
+
+int
+nfssvc_decode_linkargs(struct svc_rqst *rqstp, __be32 *p,
+ struct nfsd_linkargs *args)
+{
+ if (!(p = decode_fh(p, &args->ffh))
+ || !(p = decode_fh(p, &args->tfh))
+ || !(p = decode_filename(p, &args->tname, &args->tlen)))
+ return 0;
+
+ return xdr_argsize_check(rqstp, p);
+}
+
+int
+nfssvc_decode_symlinkargs(struct svc_rqst *rqstp, __be32 *p,
+ struct nfsd_symlinkargs *args)
+{
+ if ( !(p = decode_fh(p, &args->ffh))
+ || !(p = decode_filename(p, &args->fname, &args->flen))
+ || !(p = decode_pathname(p, &args->tname, &args->tlen)))
+ return 0;
+ p = decode_sattr(p, &args->attrs);
+
+ return xdr_argsize_check(rqstp, p);
+}
+
+int
+nfssvc_decode_readdirargs(struct svc_rqst *rqstp, __be32 *p,
+ struct nfsd_readdirargs *args)
+{
+ if (!(p = decode_fh(p, &args->fh)))
+ return 0;
+ args->cookie = ntohl(*p++);
+ args->count = ntohl(*p++);
+ if (args->count > PAGE_SIZE)
+ args->count = PAGE_SIZE;
+
+ args->buffer = page_address(rqstp->rq_respages[rqstp->rq_resused++]);
+
+ return xdr_argsize_check(rqstp, p);
+}
+
+/*
+ * XDR encode functions
+ */
+int
+nfssvc_encode_void(struct svc_rqst *rqstp, __be32 *p, void *dummy)
+{
+ return xdr_ressize_check(rqstp, p);
+}
+
+int
+nfssvc_encode_attrstat(struct svc_rqst *rqstp, __be32 *p,
+ struct nfsd_attrstat *resp)
+{
+ p = encode_fattr(rqstp, p, &resp->fh, &resp->stat);
+ return xdr_ressize_check(rqstp, p);
+}
+
+int
+nfssvc_encode_diropres(struct svc_rqst *rqstp, __be32 *p,
+ struct nfsd_diropres *resp)
+{
+ p = encode_fh(p, &resp->fh);
+ p = encode_fattr(rqstp, p, &resp->fh, &resp->stat);
+ return xdr_ressize_check(rqstp, p);
+}
+
+int
+nfssvc_encode_readlinkres(struct svc_rqst *rqstp, __be32 *p,
+ struct nfsd_readlinkres *resp)
+{
+ *p++ = htonl(resp->len);
+ xdr_ressize_check(rqstp, p);
+ rqstp->rq_res.page_len = resp->len;
+ if (resp->len & 3) {
+ /* need to pad the tail */
+ rqstp->rq_res.tail[0].iov_base = p;
+ *p = 0;
+ rqstp->rq_res.tail[0].iov_len = 4 - (resp->len&3);
+ }
+ return 1;
+}
+
+int
+nfssvc_encode_readres(struct svc_rqst *rqstp, __be32 *p,
+ struct nfsd_readres *resp)
+{
+ p = encode_fattr(rqstp, p, &resp->fh, &resp->stat);
+ *p++ = htonl(resp->count);
+ xdr_ressize_check(rqstp, p);
+
+ /* now update rqstp->rq_res to reflect data as well */
+ rqstp->rq_res.page_len = resp->count;
+ if (resp->count & 3) {
+ /* need to pad the tail */
+ rqstp->rq_res.tail[0].iov_base = p;
+ *p = 0;
+ rqstp->rq_res.tail[0].iov_len = 4 - (resp->count&3);
+ }
+ return 1;
+}
+
+int
+nfssvc_encode_readdirres(struct svc_rqst *rqstp, __be32 *p,
+ struct nfsd_readdirres *resp)
+{
+ xdr_ressize_check(rqstp, p);
+ p = resp->buffer;
+ *p++ = 0; /* no more entries */
+ *p++ = htonl((resp->common.err == nfserr_eof));
+ rqstp->rq_res.page_len = (((unsigned long)p-1) & ~PAGE_MASK)+1;
+
+ return 1;
+}
+
+int
+nfssvc_encode_statfsres(struct svc_rqst *rqstp, __be32 *p,
+ struct nfsd_statfsres *resp)
+{
+ struct kstatfs *stat = &resp->stats;
+
+ *p++ = htonl(NFSSVC_MAXBLKSIZE_V2); /* max transfer size */
+ *p++ = htonl(stat->f_bsize);
+ *p++ = htonl(stat->f_blocks);
+ *p++ = htonl(stat->f_bfree);
+ *p++ = htonl(stat->f_bavail);
+ return xdr_ressize_check(rqstp, p);
+}
+
+int
+nfssvc_encode_entry(void *ccdv, const char *name,
+ int namlen, loff_t offset, u64 ino, unsigned int d_type)
+{
+ struct readdir_cd *ccd = ccdv;
+ struct nfsd_readdirres *cd = container_of(ccd, struct nfsd_readdirres, common);
+ __be32 *p = cd->buffer;
+ int buflen, slen;
+
+ /*
+ dprintk("nfsd: entry(%.*s off %ld ino %ld)\n",
+ namlen, name, offset, ino);
+ */
+
+ if (offset > ~((u32) 0)) {
+ cd->common.err = nfserr_fbig;
+ return -EINVAL;
+ }
+ if (cd->offset)
+ *cd->offset = htonl(offset);
+ if (namlen > NFS2_MAXNAMLEN)
+ namlen = NFS2_MAXNAMLEN;/* truncate filename */
+
+ slen = XDR_QUADLEN(namlen);
+ if ((buflen = cd->buflen - slen - 4) < 0) {
+ cd->common.err = nfserr_toosmall;
+ return -EINVAL;
+ }
+ if (ino > ~((u32) 0)) {
+ cd->common.err = nfserr_fbig;
+ return -EINVAL;
+ }
+ *p++ = xdr_one; /* mark entry present */
+ *p++ = htonl((u32) ino); /* file id */
+ p = xdr_encode_array(p, name, namlen);/* name length & name */
+ cd->offset = p; /* remember pointer */
+ *p++ = htonl(~0U); /* offset of next entry */
+
+ cd->buflen = buflen;
+ cd->buffer = p;
+ cd->common.err = nfs_ok;
+ return 0;
+}
+
+/*
+ * XDR release functions
+ */
+int
+nfssvc_release_fhandle(struct svc_rqst *rqstp, __be32 *p,
+ struct nfsd_fhandle *resp)
+{
+ fh_put(&resp->fh);
+ return 1;
+}