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-rw-r--r--xlators/nfs/server/src/nfs-common.c379
1 files changed, 379 insertions, 0 deletions
diff --git a/xlators/nfs/server/src/nfs-common.c b/xlators/nfs/server/src/nfs-common.c
new file mode 100644
index 00000000000..3623f041c14
--- /dev/null
+++ b/xlators/nfs/server/src/nfs-common.c
@@ -0,0 +1,379 @@
+/*
+ Copyright (c) 2010 Gluster, Inc. <http://www.gluster.com>
+ This file is part of GlusterFS.
+
+ GlusterFS is free software; you can redistribute it and/or modify
+ it under the terms of the GNU General Public License as published
+ by the Free Software Foundation; either version 3 of the License,
+ or (at your option) any later version.
+
+ GlusterFS is distributed in the hope that it will be useful, but
+ WITHOUT ANY WARRANTY; without even the implied warranty of
+ MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
+ General Public License for more details.
+
+ You should have received a copy of the GNU General Public License
+ along with this program. If not, see
+ <http://www.gnu.org/licenses/>.
+*/
+
+#ifndef _CONFIG_H
+#define _CONFIG_H
+#include "config.h"
+#endif
+
+#include "rpcsvc.h"
+#include "dict.h"
+#include "xlator.h"
+#include "xdr-nfs3.h"
+#include "msg-nfs3.h"
+#include "iobuf.h"
+#include "nfs-common.h"
+#include "nfs-fops.h"
+#include "rpcsvc.h"
+#include "iatt.h"
+
+#include <libgen.h>
+
+xlator_t *
+nfs_xlid_to_xlator (xlator_list_t *cl, uint8_t xlid)
+{
+ xlator_t *xl = NULL;
+ uint8_t id = 0;
+
+ while (id <= xlid) {
+ if (!cl) {
+ xl = NULL;
+ break;
+ }
+
+ xl = cl->xlator;
+ cl = cl->next;
+ id++;
+ }
+
+ return xl;
+}
+
+
+xlator_t *
+nfs_path_to_xlator (xlator_list_t *cl, char *path)
+{
+ return NULL;
+}
+
+
+uint16_t
+nfs_xlator_to_xlid (xlator_list_t *cl, xlator_t *xl)
+{
+ uint16_t xlid = 0;
+
+ if ((!cl) || (!xl))
+ return 0;
+
+ while (cl) {
+ if (xl == cl->xlator)
+ break;
+ cl = cl->next;
+ ++xlid;
+ }
+
+ return xlid;
+}
+
+
+xlator_t *
+nfs_mntpath_to_xlator (xlator_list_t *cl, char *path)
+{
+ char volname[MNTPATHLEN];
+ char *volptr = NULL;
+ int pathlen = 0;
+ xlator_t *targetxl = NULL;
+
+ if ((!cl) || (!path))
+ return NULL;
+
+ strcpy (volname, path);
+ pathlen = strlen (volname);
+ gf_log (GF_NFS, GF_LOG_TRACE, "Subvolume search: %s", path);
+ if (volname[0] == '/')
+ volptr = &volname[1];
+ else
+ volptr = &volname[0];
+
+ if (volname[pathlen - 1] == '/')
+ volname[pathlen - 1] = '\0';
+
+ while (cl) {
+ if (strcmp (volptr, cl->xlator->name) == 0) {
+ targetxl = cl->xlator;
+ break;
+ }
+
+ cl = cl->next;
+ }
+
+ return targetxl;
+
+}
+
+
+/* Returns 1 if the stat seems to be filled with zeroes. */
+int
+nfs_zero_filled_stat (struct iatt *buf)
+{
+ if (!buf)
+ return 1;
+
+ /* Do not use st_dev because it is transformed to store the xlator id
+ * in place of the device number. Do not use st_ino because by this time
+ * we've already mapped the root ino to 1 so it is not guaranteed to be
+ * 0.
+ */
+ if ((buf->ia_nlink == 0) && (buf->ia_type == 0))
+ return 1;
+
+ return 0;
+}
+
+
+void
+nfs_loc_wipe (loc_t *loc)
+{
+ if (!loc)
+ return;
+
+ if (loc->path) {
+ FREE (loc->path);
+ loc->path = NULL;
+ }
+
+ if (loc->parent) {
+ inode_unref (loc->parent);
+ loc->parent = NULL;
+ }
+
+ if (loc->inode) {
+ inode_unref (loc->inode);
+ loc->inode = NULL;
+ }
+
+ loc->ino = 0;
+}
+
+
+int
+nfs_loc_copy (loc_t *dst, loc_t *src)
+{
+ int ret = -1;
+
+ dst->ino = src->ino;
+
+ if (src->inode)
+ dst->inode = inode_ref (src->inode);
+
+ if (src->parent)
+ dst->parent = inode_ref (src->parent);
+
+ dst->path = strdup (src->path);
+
+ if (!dst->path)
+ goto out;
+
+ dst->name = strrchr (dst->path, '/');
+ if (dst->name)
+ dst->name++;
+
+ ret = 0;
+out:
+ return ret;
+}
+
+
+int
+nfs_loc_fill (loc_t *loc, inode_t *inode, inode_t *parent, char *path)
+{
+ int ret = -EFAULT;
+
+ if (!loc)
+ return ret;
+
+ if (inode) {
+ loc->inode = inode_ref (inode);
+ loc->ino = inode->ino;
+ }
+
+ if (parent)
+ loc->parent = inode_ref (parent);
+
+ loc->path = strdup (path);
+ if (!loc->path) {
+ gf_log (GF_NFS, GF_LOG_ERROR, "strdup failed");
+ goto loc_wipe;
+ }
+
+ loc->name = strrchr (loc->path, '/');
+ if (loc->name)
+ loc->name++;
+ else
+ goto loc_wipe;
+
+ ret = 0;
+loc_wipe:
+ if (ret < 0)
+ nfs_loc_wipe (loc);
+
+ return ret;
+}
+
+
+int
+nfs_inode_loc_fill (inode_t *inode, loc_t *loc)
+{
+ char *resolvedpath = NULL;
+ inode_t *parent = NULL;
+ int ret = -EFAULT;
+
+ if ((!inode) || (!loc))
+ return ret;
+
+ if ((inode) && (inode->ino == 1))
+ goto ignore_parent;
+
+ parent = inode_parent (inode, 0, NULL);
+ if (!parent)
+ goto err;
+
+ignore_parent:
+ ret = inode_path (inode, NULL, &resolvedpath);
+ if (ret < 0)
+ goto err;
+
+ ret = nfs_loc_fill (loc, inode, parent, resolvedpath);
+ if (ret < 0)
+ goto err;
+
+err:
+ if (parent)
+ inode_unref (parent);
+
+ if (resolvedpath)
+ FREE (resolvedpath);
+
+ return ret;
+}
+
+
+int
+nfs_ino_loc_fill (inode_table_t *itable, uint64_t ino, uint64_t gen, loc_t *loc)
+{
+ int ret = -EFAULT;
+ inode_t *inode = NULL;
+
+ if (!loc)
+ return ret;
+
+ inode = inode_get (itable, ino, gen);
+ if (!inode) {
+ ret = -ENOENT;
+ goto err;
+ }
+
+ ret = nfs_inode_loc_fill (inode, loc);
+
+err:
+ if (inode)
+ inode_unref (inode);
+ return ret;
+}
+
+
+int
+nfs_parent_inode_loc_fill (inode_t *parent, inode_t *entryinode, char *entry,
+ loc_t *loc)
+{
+ int ret = -EFAULT;
+ char *path = NULL;
+
+ if ((!parent) || (!entry) || (!loc) || (!entryinode))
+ return ret;
+
+ ret = inode_path (parent, entry, &path);
+ if (ret < 0)
+ goto err;
+
+ ret = nfs_loc_fill (loc, entryinode, parent, path);
+
+err:
+ return ret;
+}
+
+
+/* Returns -1 if parent is not available, return -2 if the entry is not
+ * available. In case the return is going to be -2, and how = NFS_RESOLVE_CREATE
+ * it does however fill in the loc so that it can be used to perform a lookup
+ * fop for the entry.
+ * On other errors, return -3. 0 on success.
+ */
+int
+nfs_entry_loc_fill (inode_table_t *itable, ino_t ino, uint64_t gen, char *entry,
+ loc_t *loc, int how)
+{
+ inode_t *parent = NULL;
+ inode_t *entryinode = NULL;
+ int ret = -3;
+ char *resolvedpath = NULL;
+
+ if ((!itable) || (!entry) || (!loc))
+ return ret;
+
+ parent = inode_get (itable, ino, gen);
+
+ ret = -1;
+ /* Will need hard resolution now */
+ if (!parent)
+ goto err;
+
+ ret = -2;
+ entryinode = inode_grep (itable, parent, entry);
+ if (!entryinode) {
+ if (how != NFS_RESOLVE_CREATE)
+ goto err;
+ else {
+ /* Even though we'll create the inode and the loc for
+ * a missing inode, we still need to return -2 so
+ * that the caller can use the filled loc to call
+ * lookup.
+ */
+ entryinode = inode_new (itable);
+ nfs_parent_inode_loc_fill (parent, entryinode, entry,
+ loc);
+ goto err;
+ }
+ }
+
+ ret = inode_path (parent, entry, &resolvedpath);
+ if (ret < 0) {
+ ret = -3;
+ goto err;
+ }
+
+ ret = nfs_loc_fill (loc, entryinode, parent, resolvedpath);
+ if (ret < 0)
+ ret = -3;
+
+err:
+ if (parent)
+ inode_unref (parent);
+
+ if (entryinode)
+ inode_unref (entryinode);
+
+ if (resolvedpath)
+ FREE (resolvedpath);
+
+ return ret;
+}
+
+
+