v4.19.13 snapshot.
diff --git a/fs/nfsd/nfsproc.c b/fs/nfsd/nfsproc.c
new file mode 100644
index 0000000..0d20fd1
--- /dev/null
+++ b/fs/nfsd/nfsproc.c
@@ -0,0 +1,823 @@
+// 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"
+
+typedef struct svc_rqst svc_rqst;
+typedef struct svc_buf svc_buf;
+
+#define NFSDDBG_FACILITY NFSDDBG_PROC
+
+
+static __be32
+nfsd_proc_null(struct svc_rqst *rqstp)
+{
+ return nfs_ok;
+}
+
+static __be32
+nfsd_return_attrs(__be32 err, struct nfsd_attrstat *resp)
+{
+ if (err) return err;
+ return fh_getattr(&resp->fh, &resp->stat);
+}
+static __be32
+nfsd_return_dirop(__be32 err, struct nfsd_diropres *resp)
+{
+ if (err) return err;
+ return fh_getattr(&resp->fh, &resp->stat);
+}
+/*
+ * 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;
+ __be32 nfserr;
+ dprintk("nfsd: GETATTR %s\n", SVCFH_fmt(&argp->fh));
+
+ fh_copy(&resp->fh, &argp->fh);
+ nfserr = fh_verify(rqstp, &resp->fh, 0,
+ NFSD_MAY_NOP | NFSD_MAY_BYPASS_GSS_ON_ROOT);
+ return nfsd_return_attrs(nfserr, resp);
+}
+
+/*
+ * 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;
+ __be32 nfserr;
+
+ 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.
+ */
+ time_t delta = iap->ia_atime.tv_sec - get_seconds();
+
+ nfserr = fh_verify(rqstp, fhp, 0, NFSD_MAY_NOP);
+ if (nfserr)
+ goto done;
+
+ if (delta < 0)
+ delta = -delta;
+ if (delta < MAX_TOUCH_TIME_ERROR &&
+ setattr_prepare(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;
+ }
+ }
+
+ nfserr = nfsd_setattr(rqstp, fhp, iap, 0, (time_t)0);
+done:
+ return nfsd_return_attrs(nfserr, resp);
+}
+
+/*
+ * 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;
+ __be32 nfserr;
+
+ dprintk("nfsd: LOOKUP %s %.*s\n",
+ SVCFH_fmt(&argp->fh), argp->len, argp->name);
+
+ fh_init(&resp->fh, NFS_FHSIZE);
+ nfserr = nfsd_lookup(rqstp, &argp->fh, argp->name, argp->len,
+ &resp->fh);
+
+ fh_put(&argp->fh);
+ return nfsd_return_dirop(nfserr, resp);
+}
+
+/*
+ * Read a symlink.
+ */
+static __be32
+nfsd_proc_readlink(struct svc_rqst *rqstp)
+{
+ struct nfsd_readlinkargs *argp = rqstp->rq_argp;
+ struct nfsd_readlinkres *resp = rqstp->rq_resp;
+ __be32 nfserr;
+
+ dprintk("nfsd: READLINK %s\n", SVCFH_fmt(&argp->fh));
+
+ /* Read the symlink. */
+ resp->len = NFS_MAXPATHLEN;
+ nfserr = nfsd_readlink(rqstp, &argp->fh, argp->buffer, &resp->len);
+
+ fh_put(&argp->fh);
+ return nfserr;
+}
+
+/*
+ * 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;
+ __be32 nfserr;
+
+ dprintk("nfsd: READ %s %d bytes at %d\n",
+ SVCFH_fmt(&argp->fh),
+ argp->count, argp->offset);
+
+ /* Obtain buffer pointer for payload. 19 is 1 word for
+ * status, 17 words for fattr, and 1 word for the byte count.
+ */
+
+ if (NFSSVC_MAXBLKSIZE_V2 < argp->count) {
+ char buf[RPC_MAX_ADDRBUFLEN];
+ printk(KERN_NOTICE
+ "oversized read request from %s (%d bytes)\n",
+ svc_print_addr(rqstp, buf, sizeof(buf)),
+ argp->count);
+ argp->count = NFSSVC_MAXBLKSIZE_V2;
+ }
+ svc_reserve_auth(rqstp, (19<<2) + argp->count + 4);
+
+ resp->count = argp->count;
+ nfserr = nfsd_read(rqstp, fh_copy(&resp->fh, &argp->fh),
+ argp->offset,
+ rqstp->rq_vec, argp->vlen,
+ &resp->count);
+
+ if (nfserr) return nfserr;
+ return fh_getattr(&resp->fh, &resp->stat);
+}
+
+/*
+ * 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;
+ __be32 nfserr;
+ unsigned long cnt = argp->len;
+ unsigned int nvecs;
+
+ dprintk("nfsd: WRITE %s %d bytes at %d\n",
+ SVCFH_fmt(&argp->fh),
+ argp->len, argp->offset);
+
+ nvecs = svc_fill_write_vector(rqstp, rqstp->rq_arg.pages,
+ &argp->first, cnt);
+ if (!nvecs)
+ return nfserr_io;
+ nfserr = nfsd_write(rqstp, fh_copy(&resp->fh, &argp->fh),
+ argp->offset, rqstp->rq_vec, nvecs,
+ &cnt, NFS_DATA_SYNC);
+ return nfsd_return_attrs(nfserr, resp);
+}
+
+/*
+ * 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;
+ __be32 nfserr;
+ 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 */
+ nfserr = fh_verify(rqstp, dirfhp, S_IFDIR, NFSD_MAY_EXEC);
+ if (nfserr)
+ goto done; /* must fh_put dirfhp even on error */
+
+ /* Check for NFSD_MAY_WRITE in nfsd_create if necessary */
+
+ nfserr = nfserr_exist;
+ if (isdotent(argp->name, argp->len))
+ goto done;
+ hosterr = fh_want_write(dirfhp);
+ if (hosterr) {
+ nfserr = 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)) {
+ nfserr = nfserrno(PTR_ERR(dchild));
+ goto out_unlock;
+ }
+ fh_init(newfhp, NFS_FHSIZE);
+ nfserr = fh_compose(newfhp, dirfhp->fh_export, dchild, dirfhp);
+ if (!nfserr && d_really_is_negative(dchild))
+ nfserr = nfserr_noent;
+ dput(dchild);
+ if (nfserr) {
+ if (nfserr != 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 ...
+ */
+ nfserr = 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
+ */
+ nfserr = nfsd_permission(rqstp,
+ newfhp->fh_export,
+ newfhp->fh_dentry,
+ NFSD_MAY_WRITE|NFSD_MAY_LOCAL_ACCESS);
+ if (nfserr && nfserr != 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 */
+ nfserr = nfserr_exist;
+ if (inode && type != (inode->i_mode & S_IFMT))
+ goto out_unlock;
+ }
+
+ nfserr = 0;
+ if (!inode) {
+ /* File doesn't exist. Create it and set attrs */
+ nfserr = 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)
+ nfserr = nfsd_setattr(rqstp, newfhp, attr, 0, (time_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);
+ return nfsd_return_dirop(nfserr, resp);
+}
+
+static __be32
+nfsd_proc_remove(struct svc_rqst *rqstp)
+{
+ struct nfsd_diropargs *argp = rqstp->rq_argp;
+ __be32 nfserr;
+
+ dprintk("nfsd: REMOVE %s %.*s\n", SVCFH_fmt(&argp->fh),
+ argp->len, argp->name);
+
+ /* Unlink. -SIFDIR means file must not be a directory */
+ nfserr = nfsd_unlink(rqstp, &argp->fh, -S_IFDIR, argp->name, argp->len);
+ fh_put(&argp->fh);
+ return nfserr;
+}
+
+static __be32
+nfsd_proc_rename(struct svc_rqst *rqstp)
+{
+ struct nfsd_renameargs *argp = rqstp->rq_argp;
+ __be32 nfserr;
+
+ 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);
+
+ nfserr = nfsd_rename(rqstp, &argp->ffh, argp->fname, argp->flen,
+ &argp->tfh, argp->tname, argp->tlen);
+ fh_put(&argp->ffh);
+ fh_put(&argp->tfh);
+ return nfserr;
+}
+
+static __be32
+nfsd_proc_link(struct svc_rqst *rqstp)
+{
+ struct nfsd_linkargs *argp = rqstp->rq_argp;
+ __be32 nfserr;
+
+ dprintk("nfsd: LINK %s ->\n",
+ SVCFH_fmt(&argp->ffh));
+ dprintk("nfsd: %s %.*s\n",
+ SVCFH_fmt(&argp->tfh),
+ argp->tlen,
+ argp->tname);
+
+ nfserr = nfsd_link(rqstp, &argp->tfh, argp->tname, argp->tlen,
+ &argp->ffh);
+ fh_put(&argp->ffh);
+ fh_put(&argp->tfh);
+ return nfserr;
+}
+
+static __be32
+nfsd_proc_symlink(struct svc_rqst *rqstp)
+{
+ struct nfsd_symlinkargs *argp = rqstp->rq_argp;
+ struct svc_fh newfh;
+ __be32 nfserr;
+
+ if (argp->tlen > NFS_MAXPATHLEN)
+ return nfserr_nametoolong;
+
+ argp->tname = svc_fill_symlink_pathname(rqstp, &argp->first,
+ page_address(rqstp->rq_arg.pages[0]),
+ argp->tlen);
+ if (IS_ERR(argp->tname))
+ return nfserrno(PTR_ERR(argp->tname));
+
+ dprintk("nfsd: SYMLINK %s %.*s -> %.*s\n",
+ SVCFH_fmt(&argp->ffh), argp->flen, argp->fname,
+ argp->tlen, argp->tname);
+
+ fh_init(&newfh, NFS_FHSIZE);
+ nfserr = nfsd_symlink(rqstp, &argp->ffh, argp->fname, argp->flen,
+ argp->tname, &newfh);
+
+ kfree(argp->tname);
+ fh_put(&argp->ffh);
+ fh_put(&newfh);
+ return nfserr;
+}
+
+/*
+ * 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;
+ __be32 nfserr;
+
+ 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);
+ nfserr = nfsd_create(rqstp, &argp->fh, argp->name, argp->len,
+ &argp->attrs, S_IFDIR, 0, &resp->fh);
+ fh_put(&argp->fh);
+ return nfsd_return_dirop(nfserr, resp);
+}
+
+/*
+ * Remove a directory
+ */
+static __be32
+nfsd_proc_rmdir(struct svc_rqst *rqstp)
+{
+ struct nfsd_diropargs *argp = rqstp->rq_argp;
+ __be32 nfserr;
+
+ dprintk("nfsd: RMDIR %s %.*s\n", SVCFH_fmt(&argp->fh), argp->len, argp->name);
+
+ nfserr = nfsd_unlink(rqstp, &argp->fh, S_IFDIR, argp->name, argp->len);
+ fh_put(&argp->fh);
+ return nfserr;
+}
+
+/*
+ * 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;
+ int count;
+ __be32 nfserr;
+ loff_t offset;
+
+ dprintk("nfsd: READDIR %s %d bytes at %d\n",
+ SVCFH_fmt(&argp->fh),
+ argp->count, argp->cookie);
+
+ /* Shrink to the client read size */
+ count = (argp->count >> 2) - 2;
+
+ /* Make sure we've room for the NULL ptr & eof flag */
+ count -= 2;
+ if (count < 0)
+ count = 0;
+
+ resp->buffer = argp->buffer;
+ resp->offset = NULL;
+ resp->buflen = count;
+ resp->common.err = nfs_ok;
+ /* Read directory and encode entries on the fly */
+ offset = argp->cookie;
+ nfserr = nfsd_readdir(rqstp, &argp->fh, &offset,
+ &resp->common, nfssvc_encode_entry);
+
+ resp->count = resp->buffer - argp->buffer;
+ if (resp->offset)
+ *resp->offset = htonl(offset);
+
+ fh_put(&argp->fh);
+ return nfserr;
+}
+
+/*
+ * 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;
+ __be32 nfserr;
+
+ dprintk("nfsd: STATFS %s\n", SVCFH_fmt(&argp->fh));
+
+ nfserr = nfsd_statfs(rqstp, &argp->fh, &resp->stats,
+ NFSD_MAY_BYPASS_GSS_ON_ROOT);
+ fh_put(&argp->fh);
+ return nfserr;
+}
+
+/*
+ * NFSv2 Server procedures.
+ * Only the results of non-idempotent operations are cached.
+ */
+struct nfsd_void { int dummy; };
+
+#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_void,
+ .pc_encode = nfssvc_encode_void,
+ .pc_argsize = sizeof(struct nfsd_void),
+ .pc_ressize = sizeof(struct nfsd_void),
+ .pc_cachetype = RC_NOCACHE,
+ .pc_xdrressize = ST,
+ },
+ [NFSPROC_GETATTR] = {
+ .pc_func = nfsd_proc_getattr,
+ .pc_decode = nfssvc_decode_fhandle,
+ .pc_encode = nfssvc_encode_attrstat,
+ .pc_release = nfssvc_release_fhandle,
+ .pc_argsize = sizeof(struct nfsd_fhandle),
+ .pc_ressize = sizeof(struct nfsd_attrstat),
+ .pc_cachetype = RC_NOCACHE,
+ .pc_xdrressize = ST+AT,
+ },
+ [NFSPROC_SETATTR] = {
+ .pc_func = nfsd_proc_setattr,
+ .pc_decode = nfssvc_decode_sattrargs,
+ .pc_encode = nfssvc_encode_attrstat,
+ .pc_release = nfssvc_release_fhandle,
+ .pc_argsize = sizeof(struct nfsd_sattrargs),
+ .pc_ressize = sizeof(struct nfsd_attrstat),
+ .pc_cachetype = RC_REPLBUFF,
+ .pc_xdrressize = ST+AT,
+ },
+ [NFSPROC_ROOT] = {
+ .pc_decode = nfssvc_decode_void,
+ .pc_encode = nfssvc_encode_void,
+ .pc_argsize = sizeof(struct nfsd_void),
+ .pc_ressize = sizeof(struct nfsd_void),
+ .pc_cachetype = RC_NOCACHE,
+ .pc_xdrressize = ST,
+ },
+ [NFSPROC_LOOKUP] = {
+ .pc_func = nfsd_proc_lookup,
+ .pc_decode = nfssvc_decode_diropargs,
+ .pc_encode = nfssvc_encode_diropres,
+ .pc_release = nfssvc_release_fhandle,
+ .pc_argsize = sizeof(struct nfsd_diropargs),
+ .pc_ressize = sizeof(struct nfsd_diropres),
+ .pc_cachetype = RC_NOCACHE,
+ .pc_xdrressize = ST+FH+AT,
+ },
+ [NFSPROC_READLINK] = {
+ .pc_func = nfsd_proc_readlink,
+ .pc_decode = nfssvc_decode_readlinkargs,
+ .pc_encode = nfssvc_encode_readlinkres,
+ .pc_argsize = sizeof(struct nfsd_readlinkargs),
+ .pc_ressize = sizeof(struct nfsd_readlinkres),
+ .pc_cachetype = RC_NOCACHE,
+ .pc_xdrressize = ST+1+NFS_MAXPATHLEN/4,
+ },
+ [NFSPROC_READ] = {
+ .pc_func = nfsd_proc_read,
+ .pc_decode = nfssvc_decode_readargs,
+ .pc_encode = nfssvc_encode_readres,
+ .pc_release = nfssvc_release_fhandle,
+ .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,
+ },
+ [NFSPROC_WRITECACHE] = {
+ .pc_decode = nfssvc_decode_void,
+ .pc_encode = nfssvc_encode_void,
+ .pc_argsize = sizeof(struct nfsd_void),
+ .pc_ressize = sizeof(struct nfsd_void),
+ .pc_cachetype = RC_NOCACHE,
+ .pc_xdrressize = ST,
+ },
+ [NFSPROC_WRITE] = {
+ .pc_func = nfsd_proc_write,
+ .pc_decode = nfssvc_decode_writeargs,
+ .pc_encode = nfssvc_encode_attrstat,
+ .pc_release = nfssvc_release_fhandle,
+ .pc_argsize = sizeof(struct nfsd_writeargs),
+ .pc_ressize = sizeof(struct nfsd_attrstat),
+ .pc_cachetype = RC_REPLBUFF,
+ .pc_xdrressize = ST+AT,
+ },
+ [NFSPROC_CREATE] = {
+ .pc_func = nfsd_proc_create,
+ .pc_decode = nfssvc_decode_createargs,
+ .pc_encode = nfssvc_encode_diropres,
+ .pc_release = nfssvc_release_fhandle,
+ .pc_argsize = sizeof(struct nfsd_createargs),
+ .pc_ressize = sizeof(struct nfsd_diropres),
+ .pc_cachetype = RC_REPLBUFF,
+ .pc_xdrressize = ST+FH+AT,
+ },
+ [NFSPROC_REMOVE] = {
+ .pc_func = nfsd_proc_remove,
+ .pc_decode = nfssvc_decode_diropargs,
+ .pc_encode = nfssvc_encode_void,
+ .pc_argsize = sizeof(struct nfsd_diropargs),
+ .pc_ressize = sizeof(struct nfsd_void),
+ .pc_cachetype = RC_REPLSTAT,
+ .pc_xdrressize = ST,
+ },
+ [NFSPROC_RENAME] = {
+ .pc_func = nfsd_proc_rename,
+ .pc_decode = nfssvc_decode_renameargs,
+ .pc_encode = nfssvc_encode_void,
+ .pc_argsize = sizeof(struct nfsd_renameargs),
+ .pc_ressize = sizeof(struct nfsd_void),
+ .pc_cachetype = RC_REPLSTAT,
+ .pc_xdrressize = ST,
+ },
+ [NFSPROC_LINK] = {
+ .pc_func = nfsd_proc_link,
+ .pc_decode = nfssvc_decode_linkargs,
+ .pc_encode = nfssvc_encode_void,
+ .pc_argsize = sizeof(struct nfsd_linkargs),
+ .pc_ressize = sizeof(struct nfsd_void),
+ .pc_cachetype = RC_REPLSTAT,
+ .pc_xdrressize = ST,
+ },
+ [NFSPROC_SYMLINK] = {
+ .pc_func = nfsd_proc_symlink,
+ .pc_decode = nfssvc_decode_symlinkargs,
+ .pc_encode = nfssvc_encode_void,
+ .pc_argsize = sizeof(struct nfsd_symlinkargs),
+ .pc_ressize = sizeof(struct nfsd_void),
+ .pc_cachetype = RC_REPLSTAT,
+ .pc_xdrressize = ST,
+ },
+ [NFSPROC_MKDIR] = {
+ .pc_func = nfsd_proc_mkdir,
+ .pc_decode = nfssvc_decode_createargs,
+ .pc_encode = nfssvc_encode_diropres,
+ .pc_release = nfssvc_release_fhandle,
+ .pc_argsize = sizeof(struct nfsd_createargs),
+ .pc_ressize = sizeof(struct nfsd_diropres),
+ .pc_cachetype = RC_REPLBUFF,
+ .pc_xdrressize = ST+FH+AT,
+ },
+ [NFSPROC_RMDIR] = {
+ .pc_func = nfsd_proc_rmdir,
+ .pc_decode = nfssvc_decode_diropargs,
+ .pc_encode = nfssvc_encode_void,
+ .pc_argsize = sizeof(struct nfsd_diropargs),
+ .pc_ressize = sizeof(struct nfsd_void),
+ .pc_cachetype = RC_REPLSTAT,
+ .pc_xdrressize = ST,
+ },
+ [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,
+ },
+ [NFSPROC_STATFS] = {
+ .pc_func = nfsd_proc_statfs,
+ .pc_decode = nfssvc_decode_fhandle,
+ .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,
+ },
+};
+
+
+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_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, -EUCLEAN },
+ { nfserr_perm, -ENOKEY },
+ };
+ 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;
+}
+