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[/] [test_project/] [trunk/] [linux_sd_driver/] [fs/] [nfsd/] [nfsproc.c] - Blame information for rev 62

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/*
 * nfsproc2.c   Process version 2 NFS requests.
 * linux/fs/nfsd/nfs2proc.c
 *
 * Process version 2 NFS requests.
 *
 * Copyright (C) 1995-1997 Olaf Kirch <okir@monad.swb.de>
 */
 
#include <linux/linkage.h>
#include <linux/time.h>
#include <linux/errno.h>
#include <linux/fs.h>
#include <linux/stat.h>
#include <linux/fcntl.h>
#include <linux/net.h>
#include <linux/in.h>
#include <linux/namei.h>
#include <linux/unistd.h>
#include <linux/slab.h>
 
#include <linux/sunrpc/clnt.h>
#include <linux/sunrpc/svc.h>
#include <linux/nfsd/nfsd.h>
#include <linux/nfsd/cache.h>
#include <linux/nfsd/xdr.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, void *argp, void *resp)
{
        return nfs_ok;
}
 
static __be32
nfsd_return_attrs(__be32 err, struct nfsd_attrstat *resp)
{
        if (err) return err;
        return nfserrno(vfs_getattr(resp->fh.fh_export->ex_mnt,
                                    resp->fh.fh_dentry,
                                    &resp->stat));
}
static __be32
nfsd_return_dirop(__be32 err, struct nfsd_diropres *resp)
{
        if (err) return err;
        return nfserrno(vfs_getattr(resp->fh.fh_export->ex_mnt,
                                    resp->fh.fh_dentry,
                                    &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,
                                          struct nfsd_attrstat *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, MAY_NOP);
        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,
                                          struct nfsd_attrstat  *resp)
{
        __be32 nfserr;
        dprintk("nfsd: SETATTR  %s, valid=%x, size=%ld\n",
                SVCFH_fmt(&argp->fh),
                argp->attrs.ia_valid, (long) argp->attrs.ia_size);
 
        fh_copy(&resp->fh, &argp->fh);
        nfserr = nfsd_setattr(rqstp, &resp->fh, &argp->attrs,0, (time_t)0);
        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,
                                         struct nfsd_diropres  *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,
                                           struct nfsd_readlinkres *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,
                                       struct nfsd_readres  *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), NULL,
                                  argp->offset,
                                  rqstp->rq_vec, argp->vlen,
                                  &resp->count);
 
        if (nfserr) return nfserr;
        return nfserrno(vfs_getattr(resp->fh.fh_export->ex_mnt,
                                    resp->fh.fh_dentry,
                                    &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,
                                        struct nfsd_attrstat  *resp)
{
        __be32  nfserr;
        int     stable = 1;
 
        dprintk("nfsd: WRITE    %s %d bytes at %d\n",
                SVCFH_fmt(&argp->fh),
                argp->len, argp->offset);
 
        nfserr = nfsd_write(rqstp, fh_copy(&resp->fh, &argp->fh), NULL,
                                   argp->offset,
                                   rqstp->rq_vec, argp->vlen,
                                   argp->len,
                                   &stable);
        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,
                                         struct nfsd_diropres   *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;
        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, MAY_EXEC);
        if (nfserr)
                goto done; /* must fh_put dirfhp even on error */
 
        /* Check for MAY_WRITE in nfsd_create if necessary */
 
        nfserr = nfserr_acces;
        if (!argp->len)
                goto done;
        nfserr = nfserr_exist;
        if (isdotent(argp->name, argp->len))
                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 && !dchild->d_inode)
                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 = newfhp->fh_dentry->d_inode;
 
        /* 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,
                                                                 MAY_WRITE|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) {
                int     is_borc = 0;
                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 */
                        is_borc = 1;
                        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(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);
 
done:
        fh_put(dirfhp);
        return nfsd_return_dirop(nfserr, resp);
}
 
static __be32
nfsd_proc_remove(struct svc_rqst *rqstp, struct nfsd_diropargs *argp,
                                         void                  *resp)
{
        __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,
                                         void                   *resp)
{
        __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,
                                void                        *resp)
{
        __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,
                                          void                    *resp)
{
        struct svc_fh   newfh;
        __be32          nfserr;
 
        dprintk("nfsd: SYMLINK  %s %.*s -> %.*s\n",
                SVCFH_fmt(&argp->ffh), argp->flen, argp->fname,
                argp->tlen, argp->tname);
 
        fh_init(&newfh, NFS_FHSIZE);
        /*
         * Create the link, look up new file and set attrs.
         */
        nfserr = nfsd_symlink(rqstp, &argp->ffh, argp->fname, argp->flen,
                                                 argp->tname, argp->tlen,
                                                 &newfh, &argp->attrs);
 
 
        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,
                                        struct nfsd_diropres   *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,
                                        void                  *resp)
{
        __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,
                                          struct nfsd_readdirres  *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,
                                          struct nfsd_statfsres *resp)
{
        __be32  nfserr;
 
        dprintk("nfsd: STATFS   %s\n", SVCFH_fmt(&argp->fh));
 
        nfserr = nfsd_statfs(rqstp, &argp->fh, &resp->stats);
        fh_put(&argp->fh);
        return nfserr;
}
 
/*
 * NFSv2 Server procedures.
 * Only the results of non-idempotent operations are cached.
 */
#define nfsd_proc_none          NULL
#define nfssvc_release_none     NULL
struct nfsd_void { int dummy; };
 
#define PROC(name, argt, rest, relt, cache, respsize)   \
 { (svc_procfunc) nfsd_proc_##name,             \
   (kxdrproc_t) nfssvc_decode_##argt,           \
   (kxdrproc_t) nfssvc_encode_##rest,           \
   (kxdrproc_t) nfssvc_release_##relt,          \
   sizeof(struct nfsd_##argt),                  \
   sizeof(struct nfsd_##rest),                  \
   0,                                            \
   cache,                                       \
   respsize,                                    \
 }
 
#define ST 1            /* status */
#define FH 8            /* filehandle */
#define AT 18           /* attributes */
 
static struct svc_procedure             nfsd_procedures2[18] = {
  PROC(null,     void,          void,           none,           RC_NOCACHE, ST),
  PROC(getattr,  fhandle,       attrstat,       fhandle,        RC_NOCACHE, ST+AT),
  PROC(setattr,  sattrargs,     attrstat,       fhandle,        RC_REPLBUFF, ST+AT),
  PROC(none,     void,          void,           none,           RC_NOCACHE, ST),
  PROC(lookup,   diropargs,     diropres,       fhandle,        RC_NOCACHE, ST+FH+AT),
  PROC(readlink, readlinkargs,  readlinkres,    none,           RC_NOCACHE, ST+1+NFS_MAXPATHLEN/4),
  PROC(read,     readargs,      readres,        fhandle,        RC_NOCACHE, ST+AT+1+NFSSVC_MAXBLKSIZE_V2/4),
  PROC(none,     void,          void,           none,           RC_NOCACHE, ST),
  PROC(write,    writeargs,     attrstat,       fhandle,        RC_REPLBUFF, ST+AT),
  PROC(create,   createargs,    diropres,       fhandle,        RC_REPLBUFF, ST+FH+AT),
  PROC(remove,   diropargs,     void,           none,           RC_REPLSTAT, ST),
  PROC(rename,   renameargs,    void,           none,           RC_REPLSTAT, ST),
  PROC(link,     linkargs,      void,           none,           RC_REPLSTAT, ST),
  PROC(symlink,  symlinkargs,   void,           none,           RC_REPLSTAT, ST),
  PROC(mkdir,    createargs,    diropres,       fhandle,        RC_REPLBUFF, ST+FH+AT),
  PROC(rmdir,    diropargs,     void,           none,           RC_REPLSTAT, ST),
  PROC(readdir,  readdirargs,   readdirres,     none,           RC_NOCACHE, 0),
  PROC(statfs,   fhandle,       statfsres,      none,           RC_NOCACHE, ST+5),
};
 
 
struct svc_version      nfsd_version2 = {
                .vs_vers        = 2,
                .vs_nproc       = 18,
                .vs_proc        = nfsd_procedures2,
                .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_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_dropit, -EAGAIN },
                { nfserr_dropit, -ENOMEM },
                { nfserr_badname, -ESRCH },
                { nfserr_io, -ETXTBSY },
                { nfserr_notsupp, -EOPNOTSUPP },
        };
        int     i;
 
        for (i = 0; i < ARRAY_SIZE(nfs_errtbl); i++) {
                if (nfs_errtbl[i].syserr == errno)
                        return nfs_errtbl[i].nfserr;
        }
        printk (KERN_INFO "nfsd: non-standard errno: %d\n", errno);
        return nfserr_io;
}
 

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[/] [test_project/] [trunk/] [linux_sd_driver/] [fs/] [nfsd/] [nfsproc.c] - Blame information for rev 62

Line No.	Rev	Author	Line
1	62	marcus.erl	`/*`
2			`* nfsproc2.c Process version 2 NFS requests.`
3			`* linux/fs/nfsd/nfs2proc.c`
4			`*`
5			`* Process version 2 NFS requests.`
6			`*`
7			`* Copyright (C) 1995-1997 Olaf Kirch <okir@monad.swb.de>`
8			`*/`
9
10			`#include <linux/linkage.h>`
11			`#include <linux/time.h>`
12			`#include <linux/errno.h>`
13			`#include <linux/fs.h>`
14			`#include <linux/stat.h>`
15			`#include <linux/fcntl.h>`
16			`#include <linux/net.h>`
17			`#include <linux/in.h>`
18			`#include <linux/namei.h>`
19			`#include <linux/unistd.h>`
20			`#include <linux/slab.h>`
21
22			`#include <linux/sunrpc/clnt.h>`
23			`#include <linux/sunrpc/svc.h>`
24			`#include <linux/nfsd/nfsd.h>`
25			`#include <linux/nfsd/cache.h>`
26			`#include <linux/nfsd/xdr.h>`
27
28			`typedef struct svc_rqst svc_rqst;`
29			`typedef struct svc_buf svc_buf;`
30
31			`#define NFSDDBG_FACILITY NFSDDBG_PROC`
32
33
34			`static __be32`
35			`nfsd_proc_null(struct svc_rqst rqstp, void argp, void *resp)`
36			`{`
37			`return nfs_ok;`
38			`}`
39
40			`static __be32`
41			`nfsd_return_attrs(__be32 err, struct nfsd_attrstat *resp)`
42			`{`
43			`if (err) return err;`
44			`return nfserrno(vfs_getattr(resp->fh.fh_export->ex_mnt,`
45			`resp->fh.fh_dentry,`
46			`&resp->stat));`
47			`}`
48			`static __be32`
49			`nfsd_return_dirop(__be32 err, struct nfsd_diropres *resp)`
50			`{`
51			`if (err) return err;`
52			`return nfserrno(vfs_getattr(resp->fh.fh_export->ex_mnt,`
53			`resp->fh.fh_dentry,`
54			`&resp->stat));`
55			`}`
56			`/*`
57			`* Get a file's attributes`
58			`* N.B. After this call resp->fh needs an fh_put`
59			`*/`
60			`static __be32`
61			`nfsd_proc_getattr(struct svc_rqst rqstp, struct nfsd_fhandle argp,`
62			`struct nfsd_attrstat *resp)`
63			`{`
64			`__be32 nfserr;`
65			`dprintk("nfsd: GETATTR %s\n", SVCFH_fmt(&argp->fh));`
66
67			`fh_copy(&resp->fh, &argp->fh);`
68			`nfserr = fh_verify(rqstp, &resp->fh, 0, MAY_NOP);`
69			`return nfsd_return_attrs(nfserr, resp);`
70			`}`
71
72			`/*`
73			`* Set a file's attributes`
74			`* N.B. After this call resp->fh needs an fh_put`
75			`*/`
76			`static __be32`
77			`nfsd_proc_setattr(struct svc_rqst rqstp, struct nfsd_sattrargs argp,`
78			`struct nfsd_attrstat *resp)`
79			`{`
80			`__be32 nfserr;`
81			`dprintk("nfsd: SETATTR %s, valid=%x, size=%ld\n",`
82			`SVCFH_fmt(&argp->fh),`
83			`argp->attrs.ia_valid, (long) argp->attrs.ia_size);`
84
85			`fh_copy(&resp->fh, &argp->fh);`
86			`nfserr = nfsd_setattr(rqstp, &resp->fh, &argp->attrs,0, (time_t)0);`
87			`return nfsd_return_attrs(nfserr, resp);`
88			`}`
89
90			`/*`
91			`* Look up a path name component`
92			`* Note: the dentry in the resp->fh may be negative if the file`
93			`* doesn't exist yet.`
94			`* N.B. After this call resp->fh needs an fh_put`
95			`*/`
96			`static __be32`
97			`nfsd_proc_lookup(struct svc_rqst rqstp, struct nfsd_diropargs argp,`
98			`struct nfsd_diropres *resp)`
99			`{`
100			`__be32 nfserr;`
101
102			`dprintk("nfsd: LOOKUP %s %.*s\n",`
103			`SVCFH_fmt(&argp->fh), argp->len, argp->name);`
104
105			`fh_init(&resp->fh, NFS_FHSIZE);`
106			`nfserr = nfsd_lookup(rqstp, &argp->fh, argp->name, argp->len,`
107			`&resp->fh);`
108
109			`fh_put(&argp->fh);`
110			`return nfsd_return_dirop(nfserr, resp);`
111			`}`
112
113			`/*`
114			`* Read a symlink.`
115			`*/`
116			`static __be32`
117			`nfsd_proc_readlink(struct svc_rqst rqstp, struct nfsd_readlinkargs argp,`
118			`struct nfsd_readlinkres *resp)`
119			`{`
120			`__be32 nfserr;`
121
122			`dprintk("nfsd: READLINK %s\n", SVCFH_fmt(&argp->fh));`
123
124			`/* Read the symlink. */`
125			`resp->len = NFS_MAXPATHLEN;`
126			`nfserr = nfsd_readlink(rqstp, &argp->fh, argp->buffer, &resp->len);`
127
128			`fh_put(&argp->fh);`
129			`return nfserr;`
130			`}`
131
132			`/*`
133			`* Read a portion of a file.`
134			`* N.B. After this call resp->fh needs an fh_put`
135			`*/`
136			`static __be32`
137			`nfsd_proc_read(struct svc_rqst rqstp, struct nfsd_readargs argp,`
138			`struct nfsd_readres *resp)`
139			`{`
140			`__be32 nfserr;`
141
142			`dprintk("nfsd: READ %s %d bytes at %d\n",`
143			`SVCFH_fmt(&argp->fh),`
144			`argp->count, argp->offset);`
145
146			`/* Obtain buffer pointer for payload. 19 is 1 word for`
147			`* status, 17 words for fattr, and 1 word for the byte count.`
148			`*/`
149
150			`if (NFSSVC_MAXBLKSIZE_V2 < argp->count) {`
151			`char buf[RPC_MAX_ADDRBUFLEN];`
152			`printk(KERN_NOTICE`
153			`"oversized read request from %s (%d bytes)\n",`
154			`svc_print_addr(rqstp, buf, sizeof(buf)),`
155			`argp->count);`
156			`argp->count = NFSSVC_MAXBLKSIZE_V2;`
157			`}`
158			`svc_reserve_auth(rqstp, (19<<2) + argp->count + 4);`
159
160			`resp->count = argp->count;`
161			`nfserr = nfsd_read(rqstp, fh_copy(&resp->fh, &argp->fh), NULL,`
162			`argp->offset,`
163			`rqstp->rq_vec, argp->vlen,`
164			`&resp->count);`
165
166			`if (nfserr) return nfserr;`
167			`return nfserrno(vfs_getattr(resp->fh.fh_export->ex_mnt,`
168			`resp->fh.fh_dentry,`
169			`&resp->stat));`
170			`}`
171
172			`/*`
173			`* Write data to a file`
174			`* N.B. After this call resp->fh needs an fh_put`
175			`*/`
176			`static __be32`
177			`nfsd_proc_write(struct svc_rqst rqstp, struct nfsd_writeargs argp,`
178			`struct nfsd_attrstat *resp)`
179			`{`
180			`__be32 nfserr;`
181			`int stable = 1;`
182
183			`dprintk("nfsd: WRITE %s %d bytes at %d\n",`
184			`SVCFH_fmt(&argp->fh),`
185			`argp->len, argp->offset);`
186
187			`nfserr = nfsd_write(rqstp, fh_copy(&resp->fh, &argp->fh), NULL,`
188			`argp->offset,`
189			`rqstp->rq_vec, argp->vlen,`
190			`argp->len,`
191			`&stable);`
192			`return nfsd_return_attrs(nfserr, resp);`
193			`}`
194
195			`/*`
196			* CREATE processing is complicated. The keyword here is `overloaded.'
197			`* The parent directory is kept locked between the check for existence`
198			`* and the actual create() call in compliance with VFS protocols.`
199			`* N.B. After this call _both_ argp->fh and resp->fh need an fh_put`
200			`*/`
201			`static __be32`
202			`nfsd_proc_create(struct svc_rqst rqstp, struct nfsd_createargs argp,`
203			`struct nfsd_diropres *resp)`
204			`{`
205			`svc_fh *dirfhp = &argp->fh;`
206			`svc_fh *newfhp = &resp->fh;`
207			`struct iattr *attr = &argp->attrs;`
208			`struct inode *inode;`
209			`struct dentry *dchild;`
210			`int type, mode;`
211			`__be32 nfserr;`
212			`dev_t rdev = 0, wanted = new_decode_dev(attr->ia_size);`
213
214			`dprintk("nfsd: CREATE %s %.*s\n",`
215			`SVCFH_fmt(dirfhp), argp->len, argp->name);`
216
217			`/* First verify the parent file handle */`
218			`nfserr = fh_verify(rqstp, dirfhp, S_IFDIR, MAY_EXEC);`
219			`if (nfserr)`
220			`goto done; /* must fh_put dirfhp even on error */`
221
222			`/* Check for MAY_WRITE in nfsd_create if necessary */`
223
224			`nfserr = nfserr_acces;`
225			`if (!argp->len)`
226			`goto done;`
227			`nfserr = nfserr_exist;`
228			`if (isdotent(argp->name, argp->len))`
229			`goto done;`
230			`fh_lock_nested(dirfhp, I_MUTEX_PARENT);`
231			`dchild = lookup_one_len(argp->name, dirfhp->fh_dentry, argp->len);`
232			`if (IS_ERR(dchild)) {`
233			`nfserr = nfserrno(PTR_ERR(dchild));`
234			`goto out_unlock;`
235			`}`
236			`fh_init(newfhp, NFS_FHSIZE);`
237			`nfserr = fh_compose(newfhp, dirfhp->fh_export, dchild, dirfhp);`
238			`if (!nfserr && !dchild->d_inode)`
239			`nfserr = nfserr_noent;`
240			`dput(dchild);`
241			`if (nfserr) {`
242			`if (nfserr != nfserr_noent)`
243			`goto out_unlock;`
244			`/*`
245			`* If the new file handle wasn't verified, we can't tell`
246			`* whether the file exists or not. Time to bail ...`
247			`*/`
248			`nfserr = nfserr_acces;`
249			`if (!newfhp->fh_dentry) {`
250			`printk(KERN_WARNING`
251			`"nfsd_proc_create: file handle not verified\n");`
252			`goto out_unlock;`
253			`}`
254			`}`
255
256			`inode = newfhp->fh_dentry->d_inode;`
257
258			`/* Unfudge the mode bits */`
259			`if (attr->ia_valid & ATTR_MODE) {`
260			`type = attr->ia_mode & S_IFMT;`
261			`mode = attr->ia_mode & ~S_IFMT;`
262			`if (!type) {`
263			`/* no type, so if target exists, assume same as that,`
264			`* else assume a file */`
265			`if (inode) {`
266			`type = inode->i_mode & S_IFMT;`
267			`switch(type) {`
268			`case S_IFCHR:`
269			`case S_IFBLK:`
270			`/* reserve rdev for later checking */`
271			`rdev = inode->i_rdev;`
272			`attr->ia_valid \|= ATTR_SIZE;`
273
274			`/* FALLTHROUGH */`
275			`case S_IFIFO:`
276			`/* this is probably a permission check..`
277			`* at least IRIX implements perm checking on`
278			`* echo thing > device-special-file-or-pipe`
279			`* by doing a CREATE with type==0`
280			`*/`
281			`nfserr = nfsd_permission(rqstp,`
282			`newfhp->fh_export,`
283			`newfhp->fh_dentry,`
284			`MAY_WRITE\|MAY_LOCAL_ACCESS);`
285			`if (nfserr && nfserr != nfserr_rofs)`
286			`goto out_unlock;`
287			`}`
288			`} else`
289			`type = S_IFREG;`
290			`}`
291			`} else if (inode) {`
292			`type = inode->i_mode & S_IFMT;`
293			`mode = inode->i_mode & ~S_IFMT;`
294			`} else {`
295			`type = S_IFREG;`
296			`mode = 0; /* ??? */`
297			`}`
298
299			`attr->ia_valid \|= ATTR_MODE;`
300			`attr->ia_mode = mode;`
301
302			`/* Special treatment for non-regular files according to the`
303			`* gospel of sun micro`
304			`*/`
305			`if (type != S_IFREG) {`
306			`int is_borc = 0;`
307			`if (type != S_IFBLK && type != S_IFCHR) {`
308			`rdev = 0;`
309			`} else if (type == S_IFCHR && !(attr->ia_valid & ATTR_SIZE)) {`
310			`/* If you think you've seen the worst, grok this. */`
311			`type = S_IFIFO;`
312			`} else {`
313			`/* Okay, char or block special */`
314			`is_borc = 1;`
315			`if (!rdev)`
316			`rdev = wanted;`
317			`}`
318
319			`/* we've used the SIZE information, so discard it */`
320			`attr->ia_valid &= ~ATTR_SIZE;`
321
322			`/* Make sure the type and device matches */`
323			`nfserr = nfserr_exist;`
324			`if (inode && type != (inode->i_mode & S_IFMT))`
325			`goto out_unlock;`
326			`}`
327
328			`nfserr = 0;`
329			`if (!inode) {`
330			`/* File doesn't exist. Create it and set attrs */`
331			`nfserr = nfsd_create(rqstp, dirfhp, argp->name, argp->len,`
332			`attr, type, rdev, newfhp);`
333			`} else if (type == S_IFREG) {`
334			`dprintk("nfsd: existing %s, valid=%x, size=%ld\n",`
335			`argp->name, attr->ia_valid, (long) attr->ia_size);`
336			`/* File already exists. We ignore all attributes except`
337			`* size, so that creat() behaves exactly like`
338			`* open(..., O_CREAT\|O_TRUNC\|O_WRONLY).`
339			`*/`
340			`attr->ia_valid &= ATTR_SIZE;`
341			`if (attr->ia_valid)`
342			`nfserr = nfsd_setattr(rqstp, newfhp, attr, 0, (time_t)0);`
343			`}`
344
345			`out_unlock:`
346			`/* We don't really need to unlock, as fh_put does it. */`
347			`fh_unlock(dirfhp);`
348
349			`done:`
350			`fh_put(dirfhp);`
351			`return nfsd_return_dirop(nfserr, resp);`
352			`}`
353
354			`static __be32`
355			`nfsd_proc_remove(struct svc_rqst rqstp, struct nfsd_diropargs argp,`
356			`void *resp)`
357			`{`
358			`__be32 nfserr;`
359
360			`dprintk("nfsd: REMOVE %s %.*s\n", SVCFH_fmt(&argp->fh),`
361			`argp->len, argp->name);`
362
363			`/* Unlink. -SIFDIR means file must not be a directory */`
364			`nfserr = nfsd_unlink(rqstp, &argp->fh, -S_IFDIR, argp->name, argp->len);`
365			`fh_put(&argp->fh);`
366			`return nfserr;`
367			`}`
368
369			`static __be32`
370			`nfsd_proc_rename(struct svc_rqst rqstp, struct nfsd_renameargs argp,`
371			`void *resp)`
372			`{`
373			`__be32 nfserr;`
374
375			`dprintk("nfsd: RENAME %s %.*s -> \n",`
376			`SVCFH_fmt(&argp->ffh), argp->flen, argp->fname);`
377			`dprintk("nfsd: -> %s %.*s\n",`
378			`SVCFH_fmt(&argp->tfh), argp->tlen, argp->tname);`
379
380			`nfserr = nfsd_rename(rqstp, &argp->ffh, argp->fname, argp->flen,`
381			`&argp->tfh, argp->tname, argp->tlen);`
382			`fh_put(&argp->ffh);`
383			`fh_put(&argp->tfh);`
384			`return nfserr;`
385			`}`
386
387			`static __be32`
388			`nfsd_proc_link(struct svc_rqst rqstp, struct nfsd_linkargs argp,`
389			`void *resp)`
390			`{`
391			`__be32 nfserr;`
392
393			`dprintk("nfsd: LINK %s ->\n",`
394			`SVCFH_fmt(&argp->ffh));`
395			`dprintk("nfsd: %s %.*s\n",`
396			`SVCFH_fmt(&argp->tfh),`
397			`argp->tlen,`
398			`argp->tname);`
399
400			`nfserr = nfsd_link(rqstp, &argp->tfh, argp->tname, argp->tlen,`
401			`&argp->ffh);`
402			`fh_put(&argp->ffh);`
403			`fh_put(&argp->tfh);`
404			`return nfserr;`
405			`}`
406
407			`static __be32`
408			`nfsd_proc_symlink(struct svc_rqst rqstp, struct nfsd_symlinkargs argp,`
409			`void *resp)`
410			`{`
411			`struct svc_fh newfh;`
412			`__be32 nfserr;`
413
414			`dprintk("nfsd: SYMLINK %s %.s -> %.s\n",`
415			`SVCFH_fmt(&argp->ffh), argp->flen, argp->fname,`
416			`argp->tlen, argp->tname);`
417
418			`fh_init(&newfh, NFS_FHSIZE);`
419			`/*`
420			`* Create the link, look up new file and set attrs.`
421			`*/`
422			`nfserr = nfsd_symlink(rqstp, &argp->ffh, argp->fname, argp->flen,`
423			`argp->tname, argp->tlen,`
424			`&newfh, &argp->attrs);`
425
426
427			`fh_put(&argp->ffh);`
428			`fh_put(&newfh);`
429			`return nfserr;`
430			`}`
431
432			`/*`
433			`* Make directory. This operation is not idempotent.`
434			`* N.B. After this call resp->fh needs an fh_put`
435			`*/`
436			`static __be32`
437			`nfsd_proc_mkdir(struct svc_rqst rqstp, struct nfsd_createargs argp,`
438			`struct nfsd_diropres *resp)`
439			`{`
440			`__be32 nfserr;`
441
442			`dprintk("nfsd: MKDIR %s %.*s\n", SVCFH_fmt(&argp->fh), argp->len, argp->name);`
443
444			`if (resp->fh.fh_dentry) {`
445			`printk(KERN_WARNING`
446			`"nfsd_proc_mkdir: response already verified??\n");`
447			`}`
448
449			`argp->attrs.ia_valid &= ~ATTR_SIZE;`
450			`fh_init(&resp->fh, NFS_FHSIZE);`
451			`nfserr = nfsd_create(rqstp, &argp->fh, argp->name, argp->len,`
452			`&argp->attrs, S_IFDIR, 0, &resp->fh);`
453			`fh_put(&argp->fh);`
454			`return nfsd_return_dirop(nfserr, resp);`
455			`}`
456
457			`/*`
458			`* Remove a directory`
459			`*/`
460			`static __be32`
461			`nfsd_proc_rmdir(struct svc_rqst rqstp, struct nfsd_diropargs argp,`
462			`void *resp)`
463			`{`
464			`__be32 nfserr;`
465
466			`dprintk("nfsd: RMDIR %s %.*s\n", SVCFH_fmt(&argp->fh), argp->len, argp->name);`
467
468			`nfserr = nfsd_unlink(rqstp, &argp->fh, S_IFDIR, argp->name, argp->len);`
469			`fh_put(&argp->fh);`
470			`return nfserr;`
471			`}`
472
473			`/*`
474			`* Read a portion of a directory.`
475			`*/`
476			`static __be32`
477			`nfsd_proc_readdir(struct svc_rqst rqstp, struct nfsd_readdirargs argp,`
478			`struct nfsd_readdirres *resp)`
479			`{`
480			`int count;`
481			`__be32 nfserr;`
482			`loff_t offset;`
483
484			`dprintk("nfsd: READDIR %s %d bytes at %d\n",`
485			`SVCFH_fmt(&argp->fh),`
486			`argp->count, argp->cookie);`
487
488			`/* Shrink to the client read size */`
489			`count = (argp->count >> 2) - 2;`
490
491			`/* Make sure we've room for the NULL ptr & eof flag */`
492			`count -= 2;`
493			`if (count < 0)`
494			`count = 0;`
495
496			`resp->buffer = argp->buffer;`
497			`resp->offset = NULL;`
498			`resp->buflen = count;`
499			`resp->common.err = nfs_ok;`
500			`/* Read directory and encode entries on the fly */`
501			`offset = argp->cookie;`
502			`nfserr = nfsd_readdir(rqstp, &argp->fh, &offset,`
503			`&resp->common, nfssvc_encode_entry);`
504
505			`resp->count = resp->buffer - argp->buffer;`
506			`if (resp->offset)`
507			`*resp->offset = htonl(offset);`
508
509			`fh_put(&argp->fh);`
510			`return nfserr;`
511			`}`
512
513			`/*`
514			`* Get file system info`
515			`*/`
516			`static __be32`
517			`nfsd_proc_statfs(struct svc_rqst * rqstp, struct nfsd_fhandle *argp,`
518			`struct nfsd_statfsres *resp)`
519			`{`
520			`__be32 nfserr;`
521
522			`dprintk("nfsd: STATFS %s\n", SVCFH_fmt(&argp->fh));`
523
524			`nfserr = nfsd_statfs(rqstp, &argp->fh, &resp->stats);`
525			`fh_put(&argp->fh);`
526			`return nfserr;`
527			`}`
528
529			`/*`
530			`* NFSv2 Server procedures.`
531			`* Only the results of non-idempotent operations are cached.`
532			`*/`
533			`#define nfsd_proc_none NULL`
534			`#define nfssvc_release_none NULL`
535			`struct nfsd_void { int dummy; };`
536
537			`#define PROC(name, argt, rest, relt, cache, respsize) \`
538			`{ (svc_procfunc) nfsd_proc_##name, \`
539			`(kxdrproc_t) nfssvc_decode_##argt, \`
540			`(kxdrproc_t) nfssvc_encode_##rest, \`
541			`(kxdrproc_t) nfssvc_release_##relt, \`
542			`sizeof(struct nfsd_##argt), \`
543			`sizeof(struct nfsd_##rest), \`
544			`0, \`
545			`cache, \`
546			`respsize, \`
547			`}`
548
549			`#define ST 1 /* status */`
550			`#define FH 8 /* filehandle */`
551			`#define AT 18 /* attributes */`
552
553			`static struct svc_procedure nfsd_procedures2[18] = {`
554			`PROC(null, void, void, none, RC_NOCACHE, ST),`
555			`PROC(getattr, fhandle, attrstat, fhandle, RC_NOCACHE, ST+AT),`
556			`PROC(setattr, sattrargs, attrstat, fhandle, RC_REPLBUFF, ST+AT),`
557			`PROC(none, void, void, none, RC_NOCACHE, ST),`
558			`PROC(lookup, diropargs, diropres, fhandle, RC_NOCACHE, ST+FH+AT),`
559			`PROC(readlink, readlinkargs, readlinkres, none, RC_NOCACHE, ST+1+NFS_MAXPATHLEN/4),`
560			`PROC(read, readargs, readres, fhandle, RC_NOCACHE, ST+AT+1+NFSSVC_MAXBLKSIZE_V2/4),`
561			`PROC(none, void, void, none, RC_NOCACHE, ST),`
562			`PROC(write, writeargs, attrstat, fhandle, RC_REPLBUFF, ST+AT),`
563			`PROC(create, createargs, diropres, fhandle, RC_REPLBUFF, ST+FH+AT),`
564			`PROC(remove, diropargs, void, none, RC_REPLSTAT, ST),`
565			`PROC(rename, renameargs, void, none, RC_REPLSTAT, ST),`
566			`PROC(link, linkargs, void, none, RC_REPLSTAT, ST),`
567			`PROC(symlink, symlinkargs, void, none, RC_REPLSTAT, ST),`
568			`PROC(mkdir, createargs, diropres, fhandle, RC_REPLBUFF, ST+FH+AT),`
569			`PROC(rmdir, diropargs, void, none, RC_REPLSTAT, ST),`
570			`PROC(readdir, readdirargs, readdirres, none, RC_NOCACHE, 0),`
571			`PROC(statfs, fhandle, statfsres, none, RC_NOCACHE, ST+5),`
572			`};`
573
574
575			`struct svc_version nfsd_version2 = {`
576			`.vs_vers = 2,`
577			`.vs_nproc = 18,`
578			`.vs_proc = nfsd_procedures2,`
579			`.vs_dispatch = nfsd_dispatch,`
580			`.vs_xdrsize = NFS2_SVC_XDRSIZE,`
581			`};`
582
583			`/*`
584			`* Map errnos to NFS errnos.`
585			`*/`
586			`__be32`
587			`nfserrno (int errno)`
588			`{`
589			`static struct {`
590			`__be32 nfserr;`
591			`int syserr;`
592			`} nfs_errtbl[] = {`
593			`{ nfs_ok, 0 },`
594			`{ nfserr_perm, -EPERM },`
595			`{ nfserr_noent, -ENOENT },`
596			`{ nfserr_io, -EIO },`
597			`{ nfserr_nxio, -ENXIO },`
598			`{ nfserr_acces, -EACCES },`
599			`{ nfserr_exist, -EEXIST },`
600			`{ nfserr_xdev, -EXDEV },`
601			`{ nfserr_mlink, -EMLINK },`
602			`{ nfserr_nodev, -ENODEV },`
603			`{ nfserr_notdir, -ENOTDIR },`
604			`{ nfserr_isdir, -EISDIR },`
605			`{ nfserr_inval, -EINVAL },`
606			`{ nfserr_fbig, -EFBIG },`
607			`{ nfserr_nospc, -ENOSPC },`
608			`{ nfserr_rofs, -EROFS },`
609			`{ nfserr_mlink, -EMLINK },`
610			`{ nfserr_nametoolong, -ENAMETOOLONG },`
611			`{ nfserr_notempty, -ENOTEMPTY },`
612			`#ifdef EDQUOT`
613			`{ nfserr_dquot, -EDQUOT },`
614			`#endif`
615			`{ nfserr_stale, -ESTALE },`
616			`{ nfserr_jukebox, -ETIMEDOUT },`
617			`{ nfserr_dropit, -EAGAIN },`
618			`{ nfserr_dropit, -ENOMEM },`
619			`{ nfserr_badname, -ESRCH },`
620			`{ nfserr_io, -ETXTBSY },`
621			`{ nfserr_notsupp, -EOPNOTSUPP },`
622			`};`
623			`int i;`
624
625			`for (i = 0; i < ARRAY_SIZE(nfs_errtbl); i++) {`
626			`if (nfs_errtbl[i].syserr == errno)`
627			`return nfs_errtbl[i].nfserr;`
628			`}`
629			`printk (KERN_INFO "nfsd: non-standard errno: %d\n", errno);`
630			`return nfserr_io;`
631			`}`
632