diff options
Diffstat (limited to 'ANDROID_3.4.5/fs/nfsd/nfs3xdr.c')
| -rw-r--r-- | ANDROID_3.4.5/fs/nfsd/nfs3xdr.c | 1112 |
1 files changed, 0 insertions, 1112 deletions
diff --git a/ANDROID_3.4.5/fs/nfsd/nfs3xdr.c b/ANDROID_3.4.5/fs/nfsd/nfs3xdr.c deleted file mode 100644 index 43f46cd9..00000000 --- a/ANDROID_3.4.5/fs/nfsd/nfs3xdr.c +++ /dev/null @@ -1,1112 +0,0 @@ -/* - * XDR support for nfsd/protocol version 3. - * - * Copyright (C) 1995, 1996, 1997 Olaf Kirch <okir@monad.swb.de> - * - * 2003-08-09 Jamie Lokier: Use htonl() for nanoseconds, not htons()! - */ - -#include <linux/namei.h> -#include "xdr3.h" -#include "auth.h" - -#define NFSDDBG_FACILITY NFSDDBG_XDR - - -/* - * Mapping of S_IF* types to NFS file types - */ -static u32 nfs3_ftypes[] = { - NF3NON, NF3FIFO, NF3CHR, NF3BAD, - NF3DIR, NF3BAD, NF3BLK, NF3BAD, - NF3REG, NF3BAD, NF3LNK, NF3BAD, - NF3SOCK, NF3BAD, NF3LNK, NF3BAD, -}; - -/* - * XDR functions for basic NFS types - */ -static __be32 * -encode_time3(__be32 *p, struct timespec *time) -{ - *p++ = htonl((u32) time->tv_sec); *p++ = htonl(time->tv_nsec); - return p; -} - -static __be32 * -decode_time3(__be32 *p, struct timespec *time) -{ - time->tv_sec = ntohl(*p++); - time->tv_nsec = ntohl(*p++); - return p; -} - -static __be32 * -decode_fh(__be32 *p, struct svc_fh *fhp) -{ - unsigned int size; - fh_init(fhp, NFS3_FHSIZE); - size = ntohl(*p++); - if (size > NFS3_FHSIZE) - return NULL; - - memcpy(&fhp->fh_handle.fh_base, p, size); - fhp->fh_handle.fh_size = size; - return p + XDR_QUADLEN(size); -} - -/* Helper function for NFSv3 ACL code */ -__be32 *nfs3svc_decode_fh(__be32 *p, struct svc_fh *fhp) -{ - return decode_fh(p, fhp); -} - -static __be32 * -encode_fh(__be32 *p, struct svc_fh *fhp) -{ - unsigned int size = fhp->fh_handle.fh_size; - *p++ = htonl(size); - if (size) p[XDR_QUADLEN(size)-1]=0; - memcpy(p, &fhp->fh_handle.fh_base, size); - return p + XDR_QUADLEN(size); -} - -/* - * 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, NFS3_MAXNAMLEN)) != NULL) { - for (i = 0, name = *namp; i < *lenp; i++, name++) { - if (*name == '\0' || *name == '/') - return NULL; - } - } - - return p; -} - -static __be32 * -decode_sattr3(__be32 *p, struct iattr *iap) -{ - u32 tmp; - - iap->ia_valid = 0; - - if (*p++) { - iap->ia_valid |= ATTR_MODE; - iap->ia_mode = ntohl(*p++); - } - if (*p++) { - iap->ia_valid |= ATTR_UID; - iap->ia_uid = ntohl(*p++); - } - if (*p++) { - iap->ia_valid |= ATTR_GID; - iap->ia_gid = ntohl(*p++); - } - if (*p++) { - u64 newsize; - - iap->ia_valid |= ATTR_SIZE; - p = xdr_decode_hyper(p, &newsize); - if (newsize <= NFS_OFFSET_MAX) - iap->ia_size = newsize; - else - iap->ia_size = NFS_OFFSET_MAX; - } - if ((tmp = ntohl(*p++)) == 1) { /* set to server time */ - iap->ia_valid |= ATTR_ATIME; - } else if (tmp == 2) { /* set to client time */ - iap->ia_valid |= ATTR_ATIME | ATTR_ATIME_SET; - iap->ia_atime.tv_sec = ntohl(*p++); - iap->ia_atime.tv_nsec = ntohl(*p++); - } - if ((tmp = ntohl(*p++)) == 1) { /* set to server time */ - iap->ia_valid |= ATTR_MTIME; - } else if (tmp == 2) { /* set to client time */ - iap->ia_valid |= ATTR_MTIME | ATTR_MTIME_SET; - iap->ia_mtime.tv_sec = ntohl(*p++); - iap->ia_mtime.tv_nsec = ntohl(*p++); - } - return p; -} - -static __be32 *encode_fsid(__be32 *p, struct svc_fh *fhp) -{ - u64 f; - switch(fsid_source(fhp)) { - default: - case FSIDSOURCE_DEV: - p = xdr_encode_hyper(p, (u64)huge_encode_dev - (fhp->fh_dentry->d_inode->i_sb->s_dev)); - break; - case FSIDSOURCE_FSID: - p = xdr_encode_hyper(p, (u64) fhp->fh_export->ex_fsid); - break; - case FSIDSOURCE_UUID: - f = ((u64*)fhp->fh_export->ex_uuid)[0]; - f ^= ((u64*)fhp->fh_export->ex_uuid)[1]; - p = xdr_encode_hyper(p, f); - break; - } - return p; -} - -static __be32 * -encode_fattr3(struct svc_rqst *rqstp, __be32 *p, struct svc_fh *fhp, - struct kstat *stat) -{ - *p++ = htonl(nfs3_ftypes[(stat->mode & S_IFMT) >> 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(stat->mode) && stat->size > NFS3_MAXPATHLEN) { - p = xdr_encode_hyper(p, (u64) NFS3_MAXPATHLEN); - } else { - p = xdr_encode_hyper(p, (u64) stat->size); - } - p = xdr_encode_hyper(p, ((u64)stat->blocks) << 9); - *p++ = htonl((u32) MAJOR(stat->rdev)); - *p++ = htonl((u32) MINOR(stat->rdev)); - p = encode_fsid(p, fhp); - p = xdr_encode_hyper(p, stat->ino); - p = encode_time3(p, &stat->atime); - p = encode_time3(p, &stat->mtime); - p = encode_time3(p, &stat->ctime); - - return p; -} - -static __be32 * -encode_saved_post_attr(struct svc_rqst *rqstp, __be32 *p, struct svc_fh *fhp) -{ - /* Attributes to follow */ - *p++ = xdr_one; - return encode_fattr3(rqstp, p, fhp, &fhp->fh_post_attr); -} - -/* - * Encode post-operation attributes. - * The inode may be NULL if the call failed because of a stale file - * handle. In this case, no attributes are returned. - */ -static __be32 * -encode_post_op_attr(struct svc_rqst *rqstp, __be32 *p, struct svc_fh *fhp) -{ - struct dentry *dentry = fhp->fh_dentry; - if (dentry && dentry->d_inode) { - int err; - struct kstat stat; - - err = vfs_getattr(fhp->fh_export->ex_path.mnt, dentry, &stat); - if (!err) { - *p++ = xdr_one; /* attributes follow */ - lease_get_mtime(dentry->d_inode, &stat.mtime); - return encode_fattr3(rqstp, p, fhp, &stat); - } - } - *p++ = xdr_zero; - return p; -} - -/* Helper for NFSv3 ACLs */ -__be32 * -nfs3svc_encode_post_op_attr(struct svc_rqst *rqstp, __be32 *p, struct svc_fh *fhp) -{ - return encode_post_op_attr(rqstp, p, fhp); -} - -/* - * Enocde weak cache consistency data - */ -static __be32 * -encode_wcc_data(struct svc_rqst *rqstp, __be32 *p, struct svc_fh *fhp) -{ - struct dentry *dentry = fhp->fh_dentry; - - if (dentry && dentry->d_inode && fhp->fh_post_saved) { - if (fhp->fh_pre_saved) { - *p++ = xdr_one; - p = xdr_encode_hyper(p, (u64) fhp->fh_pre_size); - p = encode_time3(p, &fhp->fh_pre_mtime); - p = encode_time3(p, &fhp->fh_pre_ctime); - } else { - *p++ = xdr_zero; - } - return encode_saved_post_attr(rqstp, p, fhp); - } - /* no pre- or post-attrs */ - *p++ = xdr_zero; - return encode_post_op_attr(rqstp, p, fhp); -} - -/* - * Fill in the post_op attr for the wcc data - */ -void fill_post_wcc(struct svc_fh *fhp) -{ - int err; - - if (fhp->fh_post_saved) - printk("nfsd: inode locked twice during operation.\n"); - - err = vfs_getattr(fhp->fh_export->ex_path.mnt, fhp->fh_dentry, - &fhp->fh_post_attr); - fhp->fh_post_change = fhp->fh_dentry->d_inode->i_version; - if (err) { - fhp->fh_post_saved = 0; - /* Grab the ctime anyway - set_change_info might use it */ - fhp->fh_post_attr.ctime = fhp->fh_dentry->d_inode->i_ctime; - } else - fhp->fh_post_saved = 1; -} - -/* - * XDR decode functions - */ -int -nfs3svc_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 -nfs3svc_decode_sattrargs(struct svc_rqst *rqstp, __be32 *p, - struct nfsd3_sattrargs *args) -{ - if (!(p = decode_fh(p, &args->fh))) - return 0; - p = decode_sattr3(p, &args->attrs); - - if ((args->check_guard = ntohl(*p++)) != 0) { - struct timespec time; - p = decode_time3(p, &time); - args->guardtime = time.tv_sec; - } - - return xdr_argsize_check(rqstp, p); -} - -int -nfs3svc_decode_diropargs(struct svc_rqst *rqstp, __be32 *p, - struct nfsd3_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 -nfs3svc_decode_accessargs(struct svc_rqst *rqstp, __be32 *p, - struct nfsd3_accessargs *args) -{ - if (!(p = decode_fh(p, &args->fh))) - return 0; - args->access = ntohl(*p++); - - return xdr_argsize_check(rqstp, p); -} - -int -nfs3svc_decode_readargs(struct svc_rqst *rqstp, __be32 *p, - struct nfsd3_readargs *args) -{ - unsigned int len; - int v,pn; - u32 max_blocksize = svc_max_payload(rqstp); - - if (!(p = decode_fh(p, &args->fh))) - return 0; - p = xdr_decode_hyper(p, &args->offset); - - len = args->count = ntohl(*p++); - - if (len > max_blocksize) - len = max_blocksize; - - /* set up the kvec */ - 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 -nfs3svc_decode_writeargs(struct svc_rqst *rqstp, __be32 *p, - struct nfsd3_writeargs *args) -{ - unsigned int len, v, hdr, dlen; - u32 max_blocksize = svc_max_payload(rqstp); - - if (!(p = decode_fh(p, &args->fh))) - return 0; - p = xdr_decode_hyper(p, &args->offset); - - args->count = ntohl(*p++); - args->stable = ntohl(*p++); - len = args->len = ntohl(*p++); - /* - * The count must equal the amount of data passed. - */ - if (args->count != args->len) - 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; - - if (args->count > max_blocksize) { - args->count = max_blocksize; - len = args->len = max_blocksize; - } - 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 -nfs3svc_decode_createargs(struct svc_rqst *rqstp, __be32 *p, - struct nfsd3_createargs *args) -{ - if (!(p = decode_fh(p, &args->fh)) - || !(p = decode_filename(p, &args->name, &args->len))) - return 0; - - switch (args->createmode = ntohl(*p++)) { - case NFS3_CREATE_UNCHECKED: - case NFS3_CREATE_GUARDED: - p = decode_sattr3(p, &args->attrs); - break; - case NFS3_CREATE_EXCLUSIVE: - args->verf = p; - p += 2; - break; - default: - return 0; - } - - return xdr_argsize_check(rqstp, p); -} -int -nfs3svc_decode_mkdirargs(struct svc_rqst *rqstp, __be32 *p, - struct nfsd3_createargs *args) -{ - if (!(p = decode_fh(p, &args->fh)) || - !(p = decode_filename(p, &args->name, &args->len))) - return 0; - p = decode_sattr3(p, &args->attrs); - - return xdr_argsize_check(rqstp, p); -} - -int -nfs3svc_decode_symlinkargs(struct svc_rqst *rqstp, __be32 *p, - struct nfsd3_symlinkargs *args) -{ - unsigned int len, avail; - char *old, *new; - struct kvec *vec; - - if (!(p = decode_fh(p, &args->ffh)) || - !(p = decode_filename(p, &args->fname, &args->flen)) - ) - return 0; - p = decode_sattr3(p, &args->attrs); - - /* now decode the pathname, which might be larger than the first page. - * As we have to check for nul's anyway, we copy it into a new page - * This page appears in the rq_res.pages list, but as pages_len is always - * 0, it won't get in the way - */ - len = ntohl(*p++); - if (len == 0 || len > NFS3_MAXPATHLEN || len >= PAGE_SIZE) - return 0; - args->tname = new = - page_address(rqstp->rq_respages[rqstp->rq_resused++]); - args->tlen = len; - /* first copy and check from the first page */ - old = (char*)p; - vec = &rqstp->rq_arg.head[0]; - avail = vec->iov_len - (old - (char*)vec->iov_base); - while (len && avail && *old) { - *new++ = *old++; - len--; - avail--; - } - /* now copy next page if there is one */ - if (len && !avail && rqstp->rq_arg.page_len) { - avail = rqstp->rq_arg.page_len; - if (avail > PAGE_SIZE) - avail = PAGE_SIZE; - old = page_address(rqstp->rq_arg.pages[0]); - } - while (len && avail && *old) { - *new++ = *old++; - len--; - avail--; - } - *new = '\0'; - if (len) - return 0; - - return 1; -} - -int -nfs3svc_decode_mknodargs(struct svc_rqst *rqstp, __be32 *p, - struct nfsd3_mknodargs *args) -{ - if (!(p = decode_fh(p, &args->fh)) - || !(p = decode_filename(p, &args->name, &args->len))) - return 0; - - args->ftype = ntohl(*p++); - - if (args->ftype == NF3BLK || args->ftype == NF3CHR - || args->ftype == NF3SOCK || args->ftype == NF3FIFO) - p = decode_sattr3(p, &args->attrs); - - if (args->ftype == NF3BLK || args->ftype == NF3CHR) { - args->major = ntohl(*p++); - args->minor = ntohl(*p++); - } - - return xdr_argsize_check(rqstp, p); -} - -int -nfs3svc_decode_renameargs(struct svc_rqst *rqstp, __be32 *p, - struct nfsd3_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 -nfs3svc_decode_readlinkargs(struct svc_rqst *rqstp, __be32 *p, - struct nfsd3_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 -nfs3svc_decode_linkargs(struct svc_rqst *rqstp, __be32 *p, - struct nfsd3_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 -nfs3svc_decode_readdirargs(struct svc_rqst *rqstp, __be32 *p, - struct nfsd3_readdirargs *args) -{ - if (!(p = decode_fh(p, &args->fh))) - return 0; - p = xdr_decode_hyper(p, &args->cookie); - args->verf = p; p += 2; - args->dircount = ~0; - 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); -} - -int -nfs3svc_decode_readdirplusargs(struct svc_rqst *rqstp, __be32 *p, - struct nfsd3_readdirargs *args) -{ - int len, pn; - u32 max_blocksize = svc_max_payload(rqstp); - - if (!(p = decode_fh(p, &args->fh))) - return 0; - p = xdr_decode_hyper(p, &args->cookie); - args->verf = p; p += 2; - args->dircount = ntohl(*p++); - args->count = ntohl(*p++); - - len = (args->count > max_blocksize) ? max_blocksize : - args->count; - args->count = len; - - while (len > 0) { - pn = rqstp->rq_resused++; - if (!args->buffer) - args->buffer = page_address(rqstp->rq_respages[pn]); - len -= PAGE_SIZE; - } - - return xdr_argsize_check(rqstp, p); -} - -int -nfs3svc_decode_commitargs(struct svc_rqst *rqstp, __be32 *p, - struct nfsd3_commitargs *args) -{ - if (!(p = decode_fh(p, &args->fh))) - return 0; - p = xdr_decode_hyper(p, &args->offset); - args->count = ntohl(*p++); - - return xdr_argsize_check(rqstp, p); -} - -/* - * XDR encode functions - */ -/* - * There must be an encoding function for void results so svc_process - * will work properly. - */ -int -nfs3svc_encode_voidres(struct svc_rqst *rqstp, __be32 *p, void *dummy) -{ - return xdr_ressize_check(rqstp, p); -} - -/* GETATTR */ -int -nfs3svc_encode_attrstat(struct svc_rqst *rqstp, __be32 *p, - struct nfsd3_attrstat *resp) -{ - if (resp->status == 0) { - lease_get_mtime(resp->fh.fh_dentry->d_inode, - &resp->stat.mtime); - p = encode_fattr3(rqstp, p, &resp->fh, &resp->stat); - } - return xdr_ressize_check(rqstp, p); -} - -/* SETATTR, REMOVE, RMDIR */ -int -nfs3svc_encode_wccstat(struct svc_rqst *rqstp, __be32 *p, - struct nfsd3_attrstat *resp) -{ - p = encode_wcc_data(rqstp, p, &resp->fh); - return xdr_ressize_check(rqstp, p); -} - -/* LOOKUP */ -int -nfs3svc_encode_diropres(struct svc_rqst *rqstp, __be32 *p, - struct nfsd3_diropres *resp) -{ - if (resp->status == 0) { - p = encode_fh(p, &resp->fh); - p = encode_post_op_attr(rqstp, p, &resp->fh); - } - p = encode_post_op_attr(rqstp, p, &resp->dirfh); - return xdr_ressize_check(rqstp, p); -} - -/* ACCESS */ -int -nfs3svc_encode_accessres(struct svc_rqst *rqstp, __be32 *p, - struct nfsd3_accessres *resp) -{ - p = encode_post_op_attr(rqstp, p, &resp->fh); - if (resp->status == 0) - *p++ = htonl(resp->access); - return xdr_ressize_check(rqstp, p); -} - -/* READLINK */ -int -nfs3svc_encode_readlinkres(struct svc_rqst *rqstp, __be32 *p, - struct nfsd3_readlinkres *resp) -{ - p = encode_post_op_attr(rqstp, p, &resp->fh); - if (resp->status == 0) { - *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; - } else - return xdr_ressize_check(rqstp, p); -} - -/* READ */ -int -nfs3svc_encode_readres(struct svc_rqst *rqstp, __be32 *p, - struct nfsd3_readres *resp) -{ - p = encode_post_op_attr(rqstp, p, &resp->fh); - if (resp->status == 0) { - *p++ = htonl(resp->count); - *p++ = htonl(resp->eof); - *p++ = htonl(resp->count); /* xdr opaque 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; - } else - return xdr_ressize_check(rqstp, p); -} - -/* WRITE */ -int -nfs3svc_encode_writeres(struct svc_rqst *rqstp, __be32 *p, - struct nfsd3_writeres *resp) -{ - p = encode_wcc_data(rqstp, p, &resp->fh); - if (resp->status == 0) { - *p++ = htonl(resp->count); - *p++ = htonl(resp->committed); - *p++ = htonl(nfssvc_boot.tv_sec); - *p++ = htonl(nfssvc_boot.tv_usec); - } - return xdr_ressize_check(rqstp, p); -} - -/* CREATE, MKDIR, SYMLINK, MKNOD */ -int -nfs3svc_encode_createres(struct svc_rqst *rqstp, __be32 *p, - struct nfsd3_diropres *resp) -{ - if (resp->status == 0) { - *p++ = xdr_one; - p = encode_fh(p, &resp->fh); - p = encode_post_op_attr(rqstp, p, &resp->fh); - } - p = encode_wcc_data(rqstp, p, &resp->dirfh); - return xdr_ressize_check(rqstp, p); -} - -/* RENAME */ -int -nfs3svc_encode_renameres(struct svc_rqst *rqstp, __be32 *p, - struct nfsd3_renameres *resp) -{ - p = encode_wcc_data(rqstp, p, &resp->ffh); - p = encode_wcc_data(rqstp, p, &resp->tfh); - return xdr_ressize_check(rqstp, p); -} - -/* LINK */ -int -nfs3svc_encode_linkres(struct svc_rqst *rqstp, __be32 *p, - struct nfsd3_linkres *resp) -{ - p = encode_post_op_attr(rqstp, p, &resp->fh); - p = encode_wcc_data(rqstp, p, &resp->tfh); - return xdr_ressize_check(rqstp, p); -} - -/* READDIR */ -int -nfs3svc_encode_readdirres(struct svc_rqst *rqstp, __be32 *p, - struct nfsd3_readdirres *resp) -{ - p = encode_post_op_attr(rqstp, p, &resp->fh); - - if (resp->status == 0) { - /* stupid readdir cookie */ - memcpy(p, resp->verf, 8); p += 2; - xdr_ressize_check(rqstp, p); - if (rqstp->rq_res.head[0].iov_len + (2<<2) > PAGE_SIZE) - return 1; /*No room for trailer */ - rqstp->rq_res.page_len = (resp->count) << 2; - - /* add the 'tail' to the end of the 'head' page - page 0. */ - rqstp->rq_res.tail[0].iov_base = p; - *p++ = 0; /* no more entries */ - *p++ = htonl(resp->common.err == nfserr_eof); - rqstp->rq_res.tail[0].iov_len = 2<<2; - return 1; - } else - return xdr_ressize_check(rqstp, p); -} - -static __be32 * -encode_entry_baggage(struct nfsd3_readdirres *cd, __be32 *p, const char *name, - int namlen, u64 ino) -{ - *p++ = xdr_one; /* mark entry present */ - p = xdr_encode_hyper(p, ino); /* file id */ - p = xdr_encode_array(p, name, namlen);/* name length & name */ - - cd->offset = p; /* remember pointer */ - p = xdr_encode_hyper(p, NFS_OFFSET_MAX);/* offset of next entry */ - - return p; -} - -static __be32 -compose_entry_fh(struct nfsd3_readdirres *cd, struct svc_fh *fhp, - const char *name, int namlen) -{ - struct svc_export *exp; - struct dentry *dparent, *dchild; - __be32 rv = nfserr_noent; - - dparent = cd->fh.fh_dentry; - exp = cd->fh.fh_export; - - if (isdotent(name, namlen)) { - if (namlen == 2) { - dchild = dget_parent(dparent); - /* filesystem root - cannot return filehandle for ".." */ - if (dchild == dparent) - goto out; - } else - dchild = dget(dparent); - } else - dchild = lookup_one_len(name, dparent, namlen); - if (IS_ERR(dchild)) - return rv; - if (d_mountpoint(dchild)) - goto out; - if (!dchild->d_inode) - goto out; - rv = fh_compose(fhp, exp, dchild, &cd->fh); -out: - dput(dchild); - return rv; -} - -static __be32 *encode_entryplus_baggage(struct nfsd3_readdirres *cd, __be32 *p, const char *name, int namlen) -{ - struct svc_fh fh; - __be32 err; - - fh_init(&fh, NFS3_FHSIZE); - err = compose_entry_fh(cd, &fh, name, namlen); - if (err) { - *p++ = 0; - *p++ = 0; - goto out; - } - p = encode_post_op_attr(cd->rqstp, p, &fh); - *p++ = xdr_one; /* yes, a file handle follows */ - p = encode_fh(p, &fh); -out: - fh_put(&fh); - return p; -} - -/* - * Encode a directory entry. This one works for both normal readdir - * and readdirplus. - * The normal readdir reply requires 2 (fileid) + 1 (stringlen) - * + string + 2 (cookie) + 1 (next) words, i.e. 6 + strlen. - * - * The readdirplus baggage is 1+21 words for post_op_attr, plus the - * file handle. - */ - -#define NFS3_ENTRY_BAGGAGE (2 + 1 + 2 + 1) -#define NFS3_ENTRYPLUS_BAGGAGE (1 + 21 + 1 + (NFS3_FHSIZE >> 2)) -static int -encode_entry(struct readdir_cd *ccd, const char *name, int namlen, - loff_t offset, u64 ino, unsigned int d_type, int plus) -{ - struct nfsd3_readdirres *cd = container_of(ccd, struct nfsd3_readdirres, - common); - __be32 *p = cd->buffer; - caddr_t curr_page_addr = NULL; - int pn; /* current page number */ - int slen; /* string (name) length */ - int elen; /* estimated entry length in words */ - int num_entry_words = 0; /* actual number of words */ - - if (cd->offset) { - u64 offset64 = offset; - - if (unlikely(cd->offset1)) { - /* we ended up with offset on a page boundary */ - *cd->offset = htonl(offset64 >> 32); - *cd->offset1 = htonl(offset64 & 0xffffffff); - cd->offset1 = NULL; - } else { - xdr_encode_hyper(cd->offset, offset64); - } - } - - /* - dprintk("encode_entry(%.*s @%ld%s)\n", - namlen, name, (long) offset, plus? " plus" : ""); - */ - - /* truncate filename if too long */ - if (namlen > NFS3_MAXNAMLEN) - namlen = NFS3_MAXNAMLEN; - - slen = XDR_QUADLEN(namlen); - elen = slen + NFS3_ENTRY_BAGGAGE - + (plus? NFS3_ENTRYPLUS_BAGGAGE : 0); - - if (cd->buflen < elen) { - cd->common.err = nfserr_toosmall; - return -EINVAL; - } - - /* determine which page in rq_respages[] we are currently filling */ - for (pn=1; pn < cd->rqstp->rq_resused; pn++) { - curr_page_addr = page_address(cd->rqstp->rq_respages[pn]); - - if (((caddr_t)cd->buffer >= curr_page_addr) && - ((caddr_t)cd->buffer < curr_page_addr + PAGE_SIZE)) - break; - } - - if ((caddr_t)(cd->buffer + elen) < (curr_page_addr + PAGE_SIZE)) { - /* encode entry in current page */ - - p = encode_entry_baggage(cd, p, name, namlen, ino); - - if (plus) - p = encode_entryplus_baggage(cd, p, name, namlen); - num_entry_words = p - cd->buffer; - } else if (cd->rqstp->rq_respages[pn+1] != NULL) { - /* temporarily encode entry into next page, then move back to - * current and next page in rq_respages[] */ - __be32 *p1, *tmp; - int len1, len2; - - /* grab next page for temporary storage of entry */ - p1 = tmp = page_address(cd->rqstp->rq_respages[pn+1]); - - p1 = encode_entry_baggage(cd, p1, name, namlen, ino); - - if (plus) - p1 = encode_entryplus_baggage(cd, p1, name, namlen); - - /* determine entry word length and lengths to go in pages */ - num_entry_words = p1 - tmp; - len1 = curr_page_addr + PAGE_SIZE - (caddr_t)cd->buffer; - if ((num_entry_words << 2) < len1) { - /* the actual number of words in the entry is less - * than elen and can still fit in the current page - */ - memmove(p, tmp, num_entry_words << 2); - p += num_entry_words; - - /* update offset */ - cd->offset = cd->buffer + (cd->offset - tmp); - } else { - unsigned int offset_r = (cd->offset - tmp) << 2; - - /* update pointer to offset location. - * This is a 64bit quantity, so we need to - * deal with 3 cases: - * - entirely in first page - * - entirely in second page - * - 4 bytes in each page - */ - if (offset_r + 8 <= len1) { - cd->offset = p + (cd->offset - tmp); - } else if (offset_r >= len1) { - cd->offset -= len1 >> 2; - } else { - /* sitting on the fence */ - BUG_ON(offset_r != len1 - 4); - cd->offset = p + (cd->offset - tmp); - cd->offset1 = tmp; - } - - len2 = (num_entry_words << 2) - len1; - - /* move from temp page to current and next pages */ - memmove(p, tmp, len1); - memmove(tmp, (caddr_t)tmp+len1, len2); - - p = tmp + (len2 >> 2); - } - } - else { - cd->common.err = nfserr_toosmall; - return -EINVAL; - } - - cd->buflen -= num_entry_words; - cd->buffer = p; - cd->common.err = nfs_ok; - return 0; - -} - -int -nfs3svc_encode_entry(void *cd, const char *name, - int namlen, loff_t offset, u64 ino, unsigned int d_type) -{ - return encode_entry(cd, name, namlen, offset, ino, d_type, 0); -} - -int -nfs3svc_encode_entry_plus(void *cd, const char *name, - int namlen, loff_t offset, u64 ino, - unsigned int d_type) -{ - return encode_entry(cd, name, namlen, offset, ino, d_type, 1); -} - -/* FSSTAT */ -int -nfs3svc_encode_fsstatres(struct svc_rqst *rqstp, __be32 *p, - struct nfsd3_fsstatres *resp) -{ - struct kstatfs *s = &resp->stats; - u64 bs = s->f_bsize; - - *p++ = xdr_zero; /* no post_op_attr */ - - if (resp->status == 0) { - p = xdr_encode_hyper(p, bs * s->f_blocks); /* total bytes */ - p = xdr_encode_hyper(p, bs * s->f_bfree); /* free bytes */ - p = xdr_encode_hyper(p, bs * s->f_bavail); /* user available bytes */ - p = xdr_encode_hyper(p, s->f_files); /* total inodes */ - p = xdr_encode_hyper(p, s->f_ffree); /* free inodes */ - p = xdr_encode_hyper(p, s->f_ffree); /* user available inodes */ - *p++ = htonl(resp->invarsec); /* mean unchanged time */ - } - return xdr_ressize_check(rqstp, p); -} - -/* FSINFO */ -int -nfs3svc_encode_fsinfores(struct svc_rqst *rqstp, __be32 *p, - struct nfsd3_fsinfores *resp) -{ - *p++ = xdr_zero; /* no post_op_attr */ - - if (resp->status == 0) { - *p++ = htonl(resp->f_rtmax); - *p++ = htonl(resp->f_rtpref); - *p++ = htonl(resp->f_rtmult); - *p++ = htonl(resp->f_wtmax); - *p++ = htonl(resp->f_wtpref); - *p++ = htonl(resp->f_wtmult); - *p++ = htonl(resp->f_dtpref); - p = xdr_encode_hyper(p, resp->f_maxfilesize); - *p++ = xdr_one; - *p++ = xdr_zero; - *p++ = htonl(resp->f_properties); - } - - return xdr_ressize_check(rqstp, p); -} - -/* PATHCONF */ -int -nfs3svc_encode_pathconfres(struct svc_rqst *rqstp, __be32 *p, - struct nfsd3_pathconfres *resp) -{ - *p++ = xdr_zero; /* no post_op_attr */ - - if (resp->status == 0) { - *p++ = htonl(resp->p_link_max); - *p++ = htonl(resp->p_name_max); - *p++ = htonl(resp->p_no_trunc); - *p++ = htonl(resp->p_chown_restricted); - *p++ = htonl(resp->p_case_insensitive); - *p++ = htonl(resp->p_case_preserving); - } - - return xdr_ressize_check(rqstp, p); -} - -/* COMMIT */ -int -nfs3svc_encode_commitres(struct svc_rqst *rqstp, __be32 *p, - struct nfsd3_commitres *resp) -{ - p = encode_wcc_data(rqstp, p, &resp->fh); - /* Write verifier */ - if (resp->status == 0) { - *p++ = htonl(nfssvc_boot.tv_sec); - *p++ = htonl(nfssvc_boot.tv_usec); - } - return xdr_ressize_check(rqstp, p); -} - -/* - * XDR release functions - */ -int -nfs3svc_release_fhandle(struct svc_rqst *rqstp, __be32 *p, - struct nfsd3_attrstat *resp) -{ - fh_put(&resp->fh); - return 1; -} - -int -nfs3svc_release_fhandle2(struct svc_rqst *rqstp, __be32 *p, - struct nfsd3_fhandle_pair *resp) -{ - fh_put(&resp->fh1); - fh_put(&resp->fh2); - return 1; -} |