Linux-2.6.12-rc2v2.6.12-rc2

Initial git repository build. I'm not bothering with the full history,
even though we have it. We can create a separate "historical" git
archive of that later if we want to, and in the meantime it's about
3.2GB when imported into git - space that would just make the early
git days unnecessarily complicated, when we don't have a lot of good
infrastructure for it.

Let it rip!

1 files changed, 605 insertions, 0 deletions

diff --git a/fs/nfsd/nfsproc.c b/fs/nfsd/nfsproc.c
new file mode 100644
index 000000000000..757f9d208034
--- /dev/null
+++ b/fs/nfsd/nfsproc.c
@@ -0,0 +1,605 @@
+/*
+ * 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/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 int
+nfsd_proc_null(struct svc_rqst *rqstp, void *argp, void *resp)
+{
+        return nfs_ok;
+}
+
+/*
+ * Get a file's attributes
+ * N.B. After this call resp->fh needs an fh_put
+ */
+static int
+nfsd_proc_getattr(struct svc_rqst *rqstp, struct nfsd_fhandle  *argp,
+                                          struct nfsd_attrstat *resp)
+{
+        dprintk("nfsd: GETATTR  %s\n", SVCFH_fmt(&argp->fh));
+
+        fh_copy(&resp->fh, &argp->fh);
+        return fh_verify(rqstp, &resp->fh, 0, MAY_NOP);
+}
+
+/*
+ * Set a file's attributes
+ * N.B. After this call resp->fh needs an fh_put
+ */
+static int
+nfsd_proc_setattr(struct svc_rqst *rqstp, struct nfsd_sattrargs *argp,
+                                          struct nfsd_attrstat  *resp)
+{
+        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);
+        return nfsd_setattr(rqstp, &resp->fh, &argp->attrs,0, (time_t)0);
+}
+
+/*
+ * 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 int
+nfsd_proc_lookup(struct svc_rqst *rqstp, struct nfsd_diropargs *argp,
+                                         struct nfsd_diropres  *resp)
+{
+        int     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 nfserr;
+}
+
+/*
+ * Read a symlink.
+ */
+static int
+nfsd_proc_readlink(struct svc_rqst *rqstp, struct nfsd_readlinkargs *argp,
+                                           struct nfsd_readlinkres *resp)
+{
+        int     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 int
+nfsd_proc_read(struct svc_rqst *rqstp, struct nfsd_readargs *argp,
+                                       struct nfsd_readres  *resp)
+{
+        int     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 < argp->count) {
+                printk(KERN_NOTICE
+                        "oversized read request from %u.%u.%u.%u:%d (%d bytes)\n",
+                                NIPQUAD(rqstp->rq_addr.sin_addr.s_addr),
+                                ntohs(rqstp->rq_addr.sin_port),
+                                argp->count);
+                argp->count = NFSSVC_MAXBLKSIZE;
+        }
+        svc_reserve(rqstp, (19<<2) + argp->count + 4);
+
+        resp->count = argp->count;
+        nfserr = nfsd_read(rqstp, fh_copy(&resp->fh, &argp->fh), NULL,
+                                  argp->offset,
+                                  argp->vec, argp->vlen,
+                                  &resp->count);
+
+        return nfserr;
+}
+
+/*
+ * Write data to a file
+ * N.B. After this call resp->fh needs an fh_put
+ */
+static int
+nfsd_proc_write(struct svc_rqst *rqstp, struct nfsd_writeargs *argp,
+                                        struct nfsd_attrstat  *resp)
+{
+        int     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,
+                                   argp->vec, argp->vlen,
+                                   argp->len,
+                                   &stable);
+        return nfserr;
+}
+
+/*
+ * 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 int
+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             nfserr, type, mode;
+        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(dirfhp);
+        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(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 nfserr;
+}
+
+static int
+nfsd_proc_remove(struct svc_rqst *rqstp, struct nfsd_diropargs *argp,
+                                         void                  *resp)
+{
+        int     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 int
+nfsd_proc_rename(struct svc_rqst *rqstp, struct nfsd_renameargs *argp,
+                                         void                   *resp)
+{
+        int     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 int
+nfsd_proc_link(struct svc_rqst *rqstp, struct nfsd_linkargs *argp,
+                                void                        *resp)
+{
+        int     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 int
+nfsd_proc_symlink(struct svc_rqst *rqstp, struct nfsd_symlinkargs *argp,
+                                          void                    *resp)
+{
+        struct svc_fh   newfh;
+        int             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 int
+nfsd_proc_mkdir(struct svc_rqst *rqstp, struct nfsd_createargs *argp,
+                                        struct nfsd_diropres   *resp)
+{
+        int     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 nfserr;
+}
+
+/*
+ * Remove a directory
+ */
+static int
+nfsd_proc_rmdir(struct svc_rqst *rqstp, struct nfsd_diropargs *argp,
+                                        void                  *resp)
+{
+        int     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 int
+nfsd_proc_readdir(struct svc_rqst *rqstp, struct nfsd_readdirargs *argp,
+                                          struct nfsd_readdirres  *resp)
+{
+        int             nfserr, count;
+        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 int
+nfsd_proc_statfs(struct svc_rqst * rqstp, struct nfsd_fhandle   *argp,
+                                          struct nfsd_statfsres *resp)
+{
+        int     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),
+  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.
+ */
+int
+nfserrno (int errno)
+{
+        static struct {
+                int     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 },
+                { -1, -EIO }
+        };
+        int     i;
+
+        for (i = 0; nfs_errtbl[i].nfserr != -1; 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;
+}
+