// SPDX-License-Identifier: GPL-2.0 /* * Process version 2 NFS requests. * * Copyright (C) 1995-1997 Olaf Kirch <okir@monad.swb.de> */ #include <linux/namei.h> #include "cache.h" #include "xdr.h" #include "vfs.h" #define NFSDDBG_FACILITY NFSDDBG_PROC static __be32 nfsd_proc_null(struct svc_rqst *rqstp) { return rpc_success; } /* * Get a file's attributes * N.B. After this call resp->fh needs an fh_put */ static __be32 nfsd_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 | NFSD_MAY_BYPASS_GSS_ON_ROOT); if (resp->status != nfs_ok) goto out; resp->status = fh_getattr(&resp->fh, &resp->stat); out: return rpc_success; } /* * Set a file's attributes * N.B. After this call resp->fh needs an fh_put */ static __be32 nfsd_proc_setattr(struct svc_rqst *rqstp) { struct nfsd_sattrargs *argp = rqstp->rq_argp; struct nfsd_attrstat *resp = rqstp->rq_resp; struct iattr *iap = &argp->attrs; struct svc_fh *fhp; dprintk("nfsd: SETATTR %s, valid=%x, size=%ld\n", SVCFH_fmt(&argp->fh), argp->attrs.ia_valid, (long) argp->attrs.ia_size); fhp = fh_copy(&resp->fh, &argp->fh); /* * NFSv2 does not differentiate between "set-[ac]time-to-now" * which only requires access, and "set-[ac]time-to-X" which * requires ownership. * So if it looks like it might be "set both to the same time which * is close to now", and if setattr_prepare fails, then we * convert to "set to now" instead of "set to explicit time" * * We only call setattr_prepare as the last test as technically * it is not an interface that we should be using. */ #define BOTH_TIME_SET (ATTR_ATIME_SET | ATTR_MTIME_SET) #define MAX_TOUCH_TIME_ERROR (30*60) if ((iap->ia_valid & BOTH_TIME_SET) == BOTH_TIME_SET && iap->ia_mtime.tv_sec == iap->ia_atime.tv_sec) { /* * Looks probable. * * Now just make sure time is in the right ballpark. * Solaris, at least, doesn't seem to care what the time * request is. We require it be within 30 minutes of now. */ time64_t delta = iap->ia_atime.tv_sec - ktime_get_real_seconds(); resp->status = fh_verify(rqstp, fhp, 0, NFSD_MAY_NOP); if (resp->status != nfs_ok) goto out; if (delta < 0) delta = -delta; if (delta < MAX_TOUCH_TIME_ERROR && setattr_prepare(&init_user_ns, fhp->fh_dentry, iap) != 0) { /* * Turn off ATTR_[AM]TIME_SET but leave ATTR_[AM]TIME. * This will cause notify_change to set these times * to "now" */ iap->ia_valid &= ~BOTH_TIME_SET; } } resp->status = nfsd_setattr(rqstp, fhp, iap, 0, (time64_t)0); if (resp->status != nfs_ok) goto out; resp->status = fh_getattr(&resp->fh, &resp->stat); out: return rpc_success; } /* Obsolete, replaced by MNTPROC_MNT. */ static __be32 nfsd_proc_root(struct svc_rqst *rqstp) { return rpc_success; } /* * Look up a path name component * Note: the dentry in the resp->fh may be negative if the file * doesn't exist yet. * N.B. After this call resp->fh needs an fh_put */ static __be32 nfsd_proc_lookup(struct svc_rqst *rqstp) { struct nfsd_diropargs *argp = rqstp->rq_argp; struct nfsd_diropres *resp = rqstp->rq_resp; dprintk("nfsd: LOOKUP %s %.*s\n", SVCFH_fmt(&argp->fh), argp->len, argp->name); fh_init(&resp->fh, NFS_FHSIZE); resp->status = nfsd_lookup(rqstp, &argp->fh, argp->name, argp->len, &resp->fh); fh_put(&argp->fh); if (resp->status != nfs_ok) goto out; resp->status = fh_getattr(&resp->fh, &resp->stat); out: return rpc_success; } /* * Read a symlink. */ static __be32 nfsd_proc_readlink(struct svc_rqst *rqstp) { struct nfsd_fhandle *argp = rqstp->rq_argp; struct nfsd_readlinkres *resp = rqstp->rq_resp; dprintk("nfsd: READLINK %s\n", SVCFH_fmt(&argp->fh)); /* Read the symlink. */ resp->len = NFS_MAXPATHLEN; resp->page = *(rqstp->rq_next_page++); resp->status = nfsd_readlink(rqstp, &argp->fh, page_address(resp->page), &resp->len); fh_put(&argp->fh); return rpc_success; } /* * Read a portion of a file. * N.B. After this call resp->fh needs an fh_put */ static __be32 nfsd_proc_read(struct svc_rqst *rqstp) { struct nfsd_readargs *argp = rqstp->rq_argp; struct nfsd_readres *resp = rqstp->rq_resp; unsigned int len; u32 eof; int v; dprintk("nfsd: READ %s %d bytes at %d\n", SVCFH_fmt(&argp->fh), argp->count, argp->offset); argp->count = min_t(u32, argp->count, NFSSVC_MAXBLKSIZE_V2); v = 0; len = argp->count; resp->pages = rqstp->rq_next_page; while (len > 0) { struct page *page = *(rqstp->rq_next_page++); rqstp->rq_vec[v].iov_base = page_address(page); rqstp->rq_vec[v].iov_len = min_t(unsigned int, len, PAGE_SIZE); len -= rqstp->rq_vec[v].iov_len; v++; } /* Obtain buffer pointer for payload. 19 is 1 word for * status, 17 words for fattr, and 1 word for the byte count. */ svc_reserve_auth(rqstp, (19<<2) + argp->count + 4); resp->count = argp->count; fh_copy(&resp->fh, &argp->fh); resp->status = nfsd_read(rqstp, &resp->fh, argp->offset, rqstp->rq_vec, v, &resp->count, &eof); if (resp->status == nfs_ok) resp->status = fh_getattr(&resp->fh, &resp->stat); else if (resp->status == nfserr_jukebox) return rpc_drop_reply; return rpc_success; } /* Reserved */ static __be32 nfsd_proc_writecache(struct svc_rqst *rqstp) { return rpc_success; } /* * Write data to a file * N.B. After this call resp->fh needs an fh_put */ static __be32 nfsd_proc_write(struct svc_rqst *rqstp) { struct nfsd_writeargs *argp = rqstp->rq_argp; struct nfsd_attrstat *resp = rqstp->rq_resp; unsigned long cnt = argp->len; unsigned int nvecs; dprintk("nfsd: WRITE %s %u bytes at %d\n", SVCFH_fmt(&argp->fh), argp->len, argp->offset); nvecs = svc_fill_write_vector(rqstp, &argp->payload); resp->status = nfsd_write(rqstp, fh_copy(&resp->fh, &argp->fh), argp->offset, rqstp->rq_vec, nvecs, &cnt, NFS_DATA_SYNC, NULL); if (resp->status == nfs_ok) resp->status = fh_getattr(&resp->fh, &resp->stat); else if (resp->status == nfserr_jukebox) return rpc_drop_reply; return rpc_success; } /* * CREATE processing is complicated. The keyword here is `overloaded.' * The parent directory is kept locked between the check for existence * and the actual create() call in compliance with VFS protocols. * N.B. After this call _both_ argp->fh and resp->fh need an fh_put */ static __be32 nfsd_proc_create(struct svc_rqst *rqstp) { struct nfsd_createargs *argp = rqstp->rq_argp; struct nfsd_diropres *resp = rqstp->rq_resp; svc_fh *dirfhp = &argp->fh; svc_fh *newfhp = &resp->fh; struct iattr *attr = &argp->attrs; struct inode *inode; struct dentry *dchild; int type, mode; int hosterr; dev_t rdev = 0, wanted = new_decode_dev(attr->ia_size); dprintk("nfsd: CREATE %s %.*s\n", SVCFH_fmt(dirfhp), argp->len, argp->name); /* First verify the parent file handle */ resp->status = fh_verify(rqstp, dirfhp, S_IFDIR, NFSD_MAY_EXEC); if (resp->status != nfs_ok) goto done; /* must fh_put dirfhp even on error */ /* Check for NFSD_MAY_WRITE in nfsd_create if necessary */ resp->status = nfserr_exist; if (isdotent(argp->name, argp->len)) goto done; hosterr = fh_want_write(dirfhp); if (hosterr) { resp->status = nfserrno(hosterr); goto done; } fh_lock_nested(dirfhp, I_MUTEX_PARENT); dchild = lookup_one_len(argp->name, dirfhp->fh_dentry, argp->len); if (IS_ERR(dchild)) { resp->status = nfserrno(PTR_ERR(dchild)); goto out_unlock; } fh_init(newfhp, NFS_FHSIZE); resp->status = fh_compose(newfhp, dirfhp->fh_export, dchild, dirfhp); if (!resp->status && d_really_is_negative(dchild)) resp->status = nfserr_noent; dput(dchild); if (resp->status) { if (resp->status != nfserr_noent) goto out_unlock; /* * If the new file handle wasn't verified, we can't tell * whether the file exists or not. Time to bail ... */ resp->status = nfserr_acces; if (!newfhp->fh_dentry) { printk(KERN_WARNING "nfsd_proc_create: file handle not verified\n"); goto out_unlock; } } inode = d_inode(newfhp->fh_dentry); /* Unfudge the mode bits */ if (attr->ia_valid & ATTR_MODE) { type = attr->ia_mode & S_IFMT; mode = attr->ia_mode & ~S_IFMT; if (!type) { /* no type, so if target exists, assume same as that, * else assume a file */ if (inode) { type = inode->i_mode & S_IFMT; switch(type) { case S_IFCHR: case S_IFBLK: /* reserve rdev for later checking */ rdev = inode->i_rdev; attr->ia_valid |= ATTR_SIZE; fallthrough; case S_IFIFO: /* this is probably a permission check.. * at least IRIX implements perm checking on * echo thing > device-special-file-or-pipe * by doing a CREATE with type==0 */ resp->status = nfsd_permission(rqstp, newfhp->fh_export, newfhp->fh_dentry, NFSD_MAY_WRITE|NFSD_MAY_LOCAL_ACCESS); if (resp->status && resp->status != nfserr_rofs) goto out_unlock; } } else type = S_IFREG; } } else if (inode) { type = inode->i_mode & S_IFMT; mode = inode->i_mode & ~S_IFMT; } else { type = S_IFREG; mode = 0; /* ??? */ } attr->ia_valid |= ATTR_MODE; attr->ia_mode = mode; /* Special treatment for non-regular files according to the * gospel of sun micro */ if (type != S_IFREG) { if (type != S_IFBLK && type != S_IFCHR) { rdev = 0; } else if (type == S_IFCHR && !(attr->ia_valid & ATTR_SIZE)) { /* If you think you've seen the worst, grok this. */ type = S_IFIFO; } else { /* Okay, char or block special */ if (!rdev) rdev = wanted; } /* we've used the SIZE information, so discard it */ attr->ia_valid &= ~ATTR_SIZE; /* Make sure the type and device matches */ resp->status = nfserr_exist; if (inode && inode_wrong_type(inode, type)) goto out_unlock; } resp->status = nfs_ok; if (!inode) { /* File doesn't exist. Create it and set attrs */ resp->status = nfsd_create_locked(rqstp, dirfhp, argp->name, argp->len, attr, type, rdev, newfhp); } else if (type == S_IFREG) { dprintk("nfsd: existing %s, valid=%x, size=%ld\n", argp->name, attr->ia_valid, (long) attr->ia_size); /* File already exists. We ignore all attributes except * size, so that creat() behaves exactly like * open(..., O_CREAT|O_TRUNC|O_WRONLY). */ attr->ia_valid &= ATTR_SIZE; if (attr->ia_valid) resp->status = nfsd_setattr(rqstp, newfhp, attr, 0, (time64_t)0); } out_unlock: /* We don't really need to unlock, as fh_put does it. */ fh_unlock(dirfhp); fh_drop_write(dirfhp); done: fh_put(dirfhp); if (resp->status != nfs_ok) goto out; resp->status = fh_getattr(&resp->fh, &resp->stat); out: return rpc_success; } static __be32 nfsd_proc_remove(struct svc_rqst *rqstp) { struct nfsd_diropargs *argp = rqstp->rq_argp; struct nfsd_stat *resp = rqstp->rq_resp; dprintk("nfsd: REMOVE %s %.*s\n", SVCFH_fmt(&argp->fh), argp->len, argp->name); /* Unlink. -SIFDIR means file must not be a directory */ resp->status = nfsd_unlink(rqstp, &argp->fh, -S_IFDIR, argp->name, argp->len); fh_put(&argp->fh); return rpc_success; } static __be32 nfsd_proc_rename(struct svc_rqst *rqstp) { struct nfsd_renameargs *argp = rqstp->rq_argp; struct nfsd_stat *resp = rqstp->rq_resp; dprintk("nfsd: RENAME %s %.*s -> \n", SVCFH_fmt(&argp->ffh), argp->flen, argp->fname); dprintk("nfsd: -> %s %.*s\n", SVCFH_fmt(&argp->tfh), argp->tlen, argp->tname); resp->status = nfsd_rename(rqstp, &argp->ffh, argp->fname, argp->flen, &argp->tfh, argp->tname, argp->tlen); fh_put(&argp->ffh); fh_put(&argp->tfh); return rpc_success; } static __be32 nfsd_proc_link(struct svc_rqst *rqstp) { struct nfsd_linkargs *argp = rqstp->rq_argp; struct nfsd_stat *resp = rqstp->rq_resp; dprintk("nfsd: LINK %s ->\n", SVCFH_fmt(&argp->ffh)); dprintk("nfsd: %s %.*s\n", SVCFH_fmt(&argp->tfh), argp->tlen, argp->tname); resp->status = nfsd_link(rqstp, &argp->tfh, argp->tname, argp->tlen, &argp->ffh); fh_put(&argp->ffh); fh_put(&argp->tfh); return rpc_success; } static __be32 nfsd_proc_symlink(struct svc_rqst *rqstp) { struct nfsd_symlinkargs *argp = rqstp->rq_argp; struct nfsd_stat *resp = rqstp->rq_resp; struct svc_fh newfh; if (argp->tlen > NFS_MAXPATHLEN) { resp->status = nfserr_nametoolong; goto out; } argp->tname = svc_fill_symlink_pathname(rqstp, &argp->first, page_address(rqstp->rq_arg.pages[0]), argp->tlen); if (IS_ERR(argp->tname)) { resp->status = nfserrno(PTR_ERR(argp->tname)); goto out; } dprintk("nfsd: SYMLINK %s %.*s -> %.*s\n", SVCFH_fmt(&argp->ffh), argp->flen, argp->fname, argp->tlen, argp->tname); fh_init(&newfh, NFS_FHSIZE); resp->status = nfsd_symlink(rqstp, &argp->ffh, argp->fname, argp->flen, argp->tname, &newfh); kfree(argp->tname); fh_put(&argp->ffh); fh_put(&newfh); out: return rpc_success; } /* * Make directory. This operation is not idempotent. * N.B. After this call resp->fh needs an fh_put */ static __be32 nfsd_proc_mkdir(struct svc_rqst *rqstp) { struct nfsd_createargs *argp = rqstp->rq_argp; struct nfsd_diropres *resp = rqstp->rq_resp; dprintk("nfsd: MKDIR %s %.*s\n", SVCFH_fmt(&argp->fh), argp->len, argp->name); if (resp->fh.fh_dentry) { printk(KERN_WARNING "nfsd_proc_mkdir: response already verified??\n"); } argp->attrs.ia_valid &= ~ATTR_SIZE; fh_init(&resp->fh, NFS_FHSIZE); resp->status = nfsd_create(rqstp, &argp->fh, argp->name, argp->len, &argp->attrs, S_IFDIR, 0, &resp->fh); fh_put(&argp->fh); if (resp->status != nfs_ok) goto out; resp->status = fh_getattr(&resp->fh, &resp->stat); out: return rpc_success; } /* * Remove a directory */ static __be32 nfsd_proc_rmdir(struct svc_rqst *rqstp) { struct nfsd_diropargs *argp = rqstp->rq_argp; struct nfsd_stat *resp = rqstp->rq_resp; dprintk("nfsd: RMDIR %s %.*s\n", SVCFH_fmt(&argp->fh), argp->len, argp->name); resp->status = nfsd_unlink(rqstp, &argp->fh, S_IFDIR, argp->name, argp->len); fh_put(&argp->fh); return rpc_success; } static void nfsd_init_dirlist_pages(struct svc_rqst *rqstp, struct nfsd_readdirres *resp, u32 count) { struct xdr_buf *buf = &resp->dirlist; struct xdr_stream *xdr = &resp->xdr; count = clamp(count, (u32)(XDR_UNIT * 2), svc_max_payload(rqstp)); memset(buf, 0, sizeof(*buf)); /* Reserve room for the NULL ptr & eof flag (-2 words) */ buf->buflen = count - XDR_UNIT * 2; buf->pages = rqstp->rq_next_page; rqstp->rq_next_page++; /* This is xdr_init_encode(), but it assumes that * the head kvec has already been consumed. */ xdr_set_scratch_buffer(xdr, NULL, 0); xdr->buf = buf; xdr->page_ptr = buf->pages; xdr->iov = NULL; xdr->p = page_address(*buf->pages); xdr->end = (void *)xdr->p + min_t(u32, buf->buflen, PAGE_SIZE); xdr->rqst = NULL; } /* * Read a portion of a directory. */ static __be32 nfsd_proc_readdir(struct svc_rqst *rqstp) { struct nfsd_readdirargs *argp = rqstp->rq_argp; struct nfsd_readdirres *resp = rqstp->rq_resp; loff_t offset; dprintk("nfsd: READDIR %s %d bytes at %d\n", SVCFH_fmt(&argp->fh), argp->count, argp->cookie); nfsd_init_dirlist_pages(rqstp, resp, argp->count); resp->common.err = nfs_ok; resp->cookie_offset = 0; offset = argp->cookie; resp->status = nfsd_readdir(rqstp, &argp->fh, &offset, &resp->common, nfssvc_encode_entry); nfssvc_encode_nfscookie(resp, offset); fh_put(&argp->fh); return rpc_success; } /* * Get file system info */ static __be32 nfsd_proc_statfs(struct svc_rqst *rqstp) { struct nfsd_fhandle *argp = rqstp->rq_argp; struct nfsd_statfsres *resp = rqstp->rq_resp; dprintk("nfsd: STATFS %s\n", SVCFH_fmt(&argp->fh)); resp->status = nfsd_statfs(rqstp, &argp->fh, &resp->stats, NFSD_MAY_BYPASS_GSS_ON_ROOT); fh_put(&argp->fh); return rpc_success; } /* * NFSv2 Server procedures. * Only the results of non-idempotent operations are cached. */ #define ST 1 /* status */ #define FH 8 /* filehandle */ #define AT 18 /* attributes */ static const struct svc_procedure nfsd_procedures2[18] = { [NFSPROC_NULL] = { .pc_func = nfsd_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 = 0, .pc_name = "NULL", }, [NFSPROC_GETATTR] = { .pc_func = nfsd_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", }, [NFSPROC_SETATTR] = { .pc_func = nfsd_proc_setattr, .pc_decode = nfssvc_decode_sattrargs, .pc_encode = nfssvc_encode_attrstatres, .pc_release = nfssvc_release_attrstat, .pc_argsize = sizeof(struct nfsd_sattrargs), .pc_ressize = sizeof(struct nfsd_attrstat), .pc_cachetype = RC_REPLBUFF, .pc_xdrressize = ST+AT, .pc_name = "SETATTR", }, [NFSPROC_ROOT] = { .pc_func = nfsd_proc_root, .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 = 0, .pc_name = "ROOT", }, [NFSPROC_LOOKUP] = { .pc_func = nfsd_proc_lookup, .pc_decode = nfssvc_decode_diropargs, .pc_encode = nfssvc_encode_diropres, .pc_release = nfssvc_release_diropres, .pc_argsize = sizeof(struct nfsd_diropargs), .pc_ressize = sizeof(struct nfsd_diropres), .pc_cachetype = RC_NOCACHE, .pc_xdrressize = ST+FH+AT, .pc_name = "LOOKUP", }, [NFSPROC_READLINK] = { .pc_func = nfsd_proc_readlink, .pc_decode = nfssvc_decode_fhandleargs, .pc_encode = nfssvc_encode_readlinkres, .pc_argsize = sizeof(struct nfsd_fhandle), .pc_ressize = sizeof(struct nfsd_readlinkres), .pc_cachetype = RC_NOCACHE, .pc_xdrressize = ST+1+NFS_MAXPATHLEN/4, .pc_name = "READLINK", }, [NFSPROC_READ] = { .pc_func = nfsd_proc_read, .pc_decode = nfssvc_decode_readargs, .pc_encode = nfssvc_encode_readres, .pc_release = nfssvc_release_readres, .pc_argsize = sizeof(struct nfsd_readargs), .pc_ressize = sizeof(struct nfsd_readres), .pc_cachetype = RC_NOCACHE, .pc_xdrressize = ST+AT+1+NFSSVC_MAXBLKSIZE_V2/4, .pc_name = "READ", }, [NFSPROC_WRITECACHE] = { .pc_func = nfsd_proc_writecache, .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 = 0, .pc_name = "WRITECACHE", }, [NFSPROC_WRITE] = { .pc_func = nfsd_proc_write, .pc_decode = nfssvc_decode_writeargs, .pc_encode = nfssvc_encode_attrstatres, .pc_release = nfssvc_release_attrstat, .pc_argsize = sizeof(struct nfsd_writeargs), .pc_ressize = sizeof(struct nfsd_attrstat), .pc_cachetype = RC_REPLBUFF, .pc_xdrressize = ST+AT, .pc_name = "WRITE", }, [NFSPROC_CREATE] = { .pc_func = nfsd_proc_create, .pc_decode = nfssvc_decode_createargs, .pc_encode = nfssvc_encode_diropres, .pc_release = nfssvc_release_diropres, .pc_argsize = sizeof(struct nfsd_createargs), .pc_ressize = sizeof(struct nfsd_diropres), .pc_cachetype = RC_REPLBUFF, .pc_xdrressize = ST+FH+AT, .pc_name = "CREATE", }, [NFSPROC_REMOVE] = { .pc_func = nfsd_proc_remove, .pc_decode = nfssvc_decode_diropargs, .pc_encode = nfssvc_encode_statres, .pc_argsize = sizeof(struct nfsd_diropargs), .pc_ressize = sizeof(struct nfsd_stat), .pc_cachetype = RC_REPLSTAT, .pc_xdrressize = ST, .pc_name = "REMOVE", }, [NFSPROC_RENAME] = { .pc_func = nfsd_proc_rename, .pc_decode = nfssvc_decode_renameargs, .pc_encode = nfssvc_encode_statres, .pc_argsize = sizeof(struct nfsd_renameargs), .pc_ressize = sizeof(struct nfsd_stat), .pc_cachetype = RC_REPLSTAT, .pc_xdrressize = ST, .pc_name = "RENAME", }, [NFSPROC_LINK] = { .pc_func = nfsd_proc_link, .pc_decode = nfssvc_decode_linkargs, .pc_encode = nfssvc_encode_statres, .pc_argsize = sizeof(struct nfsd_linkargs), .pc_ressize = sizeof(struct nfsd_stat), .pc_cachetype = RC_REPLSTAT, .pc_xdrressize = ST, .pc_name = "LINK", }, [NFSPROC_SYMLINK] = { .pc_func = nfsd_proc_symlink, .pc_decode = nfssvc_decode_symlinkargs, .pc_encode = nfssvc_encode_statres, .pc_argsize = sizeof(struct nfsd_symlinkargs), .pc_ressize = sizeof(struct nfsd_stat), .pc_cachetype = RC_REPLSTAT, .pc_xdrressize = ST, .pc_name = "SYMLINK", }, [NFSPROC_MKDIR] = { .pc_func = nfsd_proc_mkdir, .pc_decode = nfssvc_decode_createargs, .pc_encode = nfssvc_encode_diropres, .pc_release = nfssvc_release_diropres, .pc_argsize = sizeof(struct nfsd_createargs), .pc_ressize = sizeof(struct nfsd_diropres), .pc_cachetype = RC_REPLBUFF, .pc_xdrressize = ST+FH+AT, .pc_name = "MKDIR", }, [NFSPROC_RMDIR] = { .pc_func = nfsd_proc_rmdir, .pc_decode = nfssvc_decode_diropargs, .pc_encode = nfssvc_encode_statres, .pc_argsize = sizeof(struct nfsd_diropargs), .pc_ressize = sizeof(struct nfsd_stat), .pc_cachetype = RC_REPLSTAT, .pc_xdrressize = ST, .pc_name = "RMDIR", }, [NFSPROC_READDIR] = { .pc_func = nfsd_proc_readdir, .pc_decode = nfssvc_decode_readdirargs, .pc_encode = nfssvc_encode_readdirres, .pc_argsize = sizeof(struct nfsd_readdirargs), .pc_ressize = sizeof(struct nfsd_readdirres), .pc_cachetype = RC_NOCACHE, .pc_name = "READDIR", }, [NFSPROC_STATFS] = { .pc_func = nfsd_proc_statfs, .pc_decode = nfssvc_decode_fhandleargs, .pc_encode = nfssvc_encode_statfsres, .pc_argsize = sizeof(struct nfsd_fhandle), .pc_ressize = sizeof(struct nfsd_statfsres), .pc_cachetype = RC_NOCACHE, .pc_xdrressize = ST+5, .pc_name = "STATFS", }, }; static unsigned int nfsd_count2[ARRAY_SIZE(nfsd_procedures2)]; const struct svc_version nfsd_version2 = { .vs_vers = 2, .vs_nproc = 18, .vs_proc = nfsd_procedures2, .vs_count = nfsd_count2, .vs_dispatch = nfsd_dispatch, .vs_xdrsize = NFS2_SVC_XDRSIZE, }; /* * Map errnos to NFS errnos. */ __be32 nfserrno (int errno) { static struct { __be32 nfserr; int syserr; } nfs_errtbl[] = { { nfs_ok, 0 }, { nfserr_perm, -EPERM }, { nfserr_noent, -ENOENT }, { nfserr_io, -EIO }, { nfserr_nxio, -ENXIO }, { nfserr_fbig, -E2BIG }, { nfserr_stale, -EBADF }, { nfserr_acces, -EACCES }, { nfserr_exist, -EEXIST }, { nfserr_xdev, -EXDEV }, { nfserr_mlink, -EMLINK }, { nfserr_nodev, -ENODEV }, { nfserr_notdir, -ENOTDIR }, { nfserr_isdir, -EISDIR }, { nfserr_inval, -EINVAL }, { nfserr_fbig, -EFBIG }, { nfserr_nospc, -ENOSPC }, { nfserr_rofs, -EROFS }, { nfserr_mlink, -EMLINK }, { nfserr_nametoolong, -ENAMETOOLONG }, { nfserr_notempty, -ENOTEMPTY }, #ifdef EDQUOT { nfserr_dquot, -EDQUOT }, #endif { nfserr_stale, -ESTALE }, { nfserr_jukebox, -ETIMEDOUT }, { nfserr_jukebox, -ERESTARTSYS }, { nfserr_jukebox, -EAGAIN }, { nfserr_jukebox, -EWOULDBLOCK }, { nfserr_jukebox, -ENOMEM }, { nfserr_io, -ETXTBSY }, { nfserr_notsupp, -EOPNOTSUPP }, { nfserr_toosmall, -ETOOSMALL }, { nfserr_serverfault, -ESERVERFAULT }, { nfserr_serverfault, -ENFILE }, { nfserr_io, -EREMOTEIO }, { nfserr_stale, -EOPENSTALE }, { nfserr_io, -EUCLEAN }, { nfserr_perm, -ENOKEY }, { nfserr_no_grace, -ENOGRACE}, }; int i; for (i = 0; i < ARRAY_SIZE(nfs_errtbl); i++) { if (nfs_errtbl[i].syserr == errno) return nfs_errtbl[i].nfserr; } WARN_ONCE(1, "nfsd: non-standard errno: %d\n", errno); return nfserr_io; }