summaryrefslogtreecommitdiffstats
path: root/xlators/features/gfid-access/src
diff options
context:
space:
mode:
authorAmar Tumballi <amarts@redhat.com>2013-07-31 22:57:12 +0530
committerAnand Avati <avati@redhat.com>2013-08-21 12:13:50 -0700
commit9cef2810909cf260762b7b9837c5a9fa67f8033c (patch)
tree9a3262128c4081f523da1b0045955c193a3d3758 /xlators/features/gfid-access/src
parentdf9bfff8ea08176a3874fb0cdec8fd4b988d3ffa (diff)
gfid-access: virtual access to filesystem through gfid path
BUG: 952029 Change-Id: I7405d473d369a4a951836eceda4faccbad19ce0e Signed-off-by: Amar Tumballi <amarts@redhat.com> Reviewed-on: http://review.gluster.org/5497 Tested-by: Gluster Build System <jenkins@build.gluster.com> Reviewed-by: Anand Avati <avati@redhat.com>
Diffstat (limited to 'xlators/features/gfid-access/src')
-rw-r--r--xlators/features/gfid-access/src/Makefile.am15
-rw-r--r--xlators/features/gfid-access/src/gfid-access-mem-types.h23
-rw-r--r--xlators/features/gfid-access/src/gfid-access.c1145
-rw-r--r--xlators/features/gfid-access/src/gfid-access.h128
4 files changed, 1311 insertions, 0 deletions
diff --git a/xlators/features/gfid-access/src/Makefile.am b/xlators/features/gfid-access/src/Makefile.am
new file mode 100644
index 0000000..db53aff
--- /dev/null
+++ b/xlators/features/gfid-access/src/Makefile.am
@@ -0,0 +1,15 @@
+xlator_LTLIBRARIES = gfid-access.la
+xlatordir = $(libdir)/glusterfs/$(PACKAGE_VERSION)/xlator/features
+
+gfid_access_la_LDFLAGS = -module -avoid-version
+
+gfid_access_la_SOURCES = gfid-access.c
+gfid_access_la_LIBADD = $(top_builddir)/libglusterfs/src/libglusterfs.la
+
+noinst_HEADERS = gfid-access.h gfid-access-mem-types.h
+
+AM_CPPFLAGS = $(GF_CPPFLAGS) -I$(top_srcdir)/libglusterfs/src
+
+AM_CFLAGS = -Wall $(GF_CFLAGS)
+
+CLEANFILES =
diff --git a/xlators/features/gfid-access/src/gfid-access-mem-types.h b/xlators/features/gfid-access/src/gfid-access-mem-types.h
new file mode 100644
index 0000000..168d67b
--- /dev/null
+++ b/xlators/features/gfid-access/src/gfid-access-mem-types.h
@@ -0,0 +1,23 @@
+/*
+ Copyright (c) 2013 Red Hat, Inc. <http://www.redhat.com>
+ This file is part of GlusterFS.
+
+ This file is licensed to you under your choice of the GNU Lesser
+ General Public License, version 3 or any later version (LGPLv3 or
+ later), or the GNU General Public License, version 2 (GPLv2), in all
+ cases as published by the Free Software Foundation.
+*/
+
+#ifndef _GFID_ACCESS_MEM_TYPES_H
+#define _GFID_ACCESS_MEM_TYPES_H
+
+#include "mem-types.h"
+
+enum gf_changelog_mem_types {
+ gf_gfid_access_mt_priv_t = gf_common_mt_end + 1,
+ gf_gfid_access_mt_gfid_t,
+ gf_gfid_access_mt_end
+};
+
+#endif
+
diff --git a/xlators/features/gfid-access/src/gfid-access.c b/xlators/features/gfid-access/src/gfid-access.c
new file mode 100644
index 0000000..62103b0
--- /dev/null
+++ b/xlators/features/gfid-access/src/gfid-access.c
@@ -0,0 +1,1145 @@
+/*
+ Copyright (c) 2013 Red Hat, Inc. <http://www.redhat.com>
+ This file is part of GlusterFS.
+
+ This file is licensed to you under your choice of the GNU Lesser
+ General Public License, version 3 or any later version (LGPLv3 or
+ later), or the GNU General Public License, version 2 (GPLv2), in all
+ cases as published by the Free Software Foundation.
+*/
+#ifndef _CONFIG_H
+#define _CONFIG_H
+#include "config.h"
+#endif
+
+#include "gfid-access.h"
+#include "inode.h"
+#include "byte-order.h"
+
+
+
+void
+ga_newfile_args_free (ga_newfile_args_t *args)
+{
+ if (!args)
+ goto out;
+
+ GF_FREE (args->bname);
+
+ if (S_ISLNK (args->st_mode) && args->args.symlink.linkpath) {
+ GF_FREE (args->args.symlink.linkpath);
+ args->args.symlink.linkpath = NULL;
+ }
+
+ mem_put (args);
+out:
+ return;
+}
+
+
+void
+ga_heal_args_free (ga_heal_args_t *args)
+{
+ if (!args)
+ goto out;
+
+ GF_FREE (args->bname);
+
+ mem_put (args);
+out:
+ return;
+}
+
+
+ga_newfile_args_t *
+ga_newfile_parse_args (xlator_t *this, data_t *data)
+{
+ ga_newfile_args_t *args = NULL;
+ ga_private_t *priv = NULL;
+ int len = 0;
+ int blob_len = 0;
+ int min_len = 0;
+ void *blob = NULL;
+
+ priv = this->private;
+
+ blob = data->data;
+ blob_len = data->len;
+
+ min_len = sizeof (args->uid) + sizeof (args->gid) + sizeof (args->gfid)
+ + sizeof (args->st_mode) + 2 + 2;
+ if (blob_len < min_len)
+ goto err;
+
+ args = mem_get0 (priv->newfile_args_pool);
+ if (args == NULL)
+ goto err;
+
+ args->uid = ntoh32 (*(uint32_t *)blob);
+ blob += sizeof (uint32_t);
+ blob_len -= sizeof (uint32_t);
+
+ args->gid = ntoh32 (*(uint32_t *)blob);
+ blob += sizeof (uint32_t);
+ blob_len -= sizeof (uint32_t);
+
+ memcpy (args->gfid, blob, sizeof (args->gfid));
+ blob += sizeof (args->gfid);
+ blob_len -= sizeof (args->gfid);
+
+ args->st_mode = ntoh32 (*(uint32_t *)blob);
+ blob += sizeof (uint32_t);
+ blob_len -= sizeof (uint32_t);
+
+ len = strnlen (blob, blob_len);
+ if (len == blob_len)
+ goto err;
+
+ args->bname = GF_CALLOC (1, (len + 1), gf_common_mt_char);
+ if (args->bname == NULL)
+ goto err;
+
+ memcpy (args->bname, blob, (len + 1));
+ blob += (len + 1);
+ blob_len -= (len + 1);
+
+ if (S_ISDIR (args->st_mode)) {
+ if (blob_len < sizeof (uint32_t))
+ goto err;
+ args->args.mkdir.mode = ntoh32 (*(uint32_t *)blob);
+ blob += sizeof (uint32_t);
+ blob_len -= sizeof (uint32_t);
+
+ if (blob_len < sizeof (uint32_t))
+ goto err;
+ args->args.mkdir.umask = ntoh32 (*(uint32_t *)blob);
+ blob += sizeof (uint32_t);
+ blob_len -= sizeof (uint32_t);
+ if (blob_len < 0)
+ goto err;
+
+ } else if (S_ISLNK (args->st_mode)) {
+ len = strnlen (blob, blob_len);
+ if (len == blob_len)
+ goto err;
+
+ args->args.symlink.linkpath = GF_CALLOC (1, len + 1,
+ gf_common_mt_char);
+ if (args->args.symlink.linkpath == NULL)
+ goto err;
+
+ memcpy (args->args.symlink.linkpath, blob, (len + 1));
+ blob += (len + 1);
+ blob_len -= (len + 1);
+ } else {
+ if (blob_len < sizeof (uint32_t))
+ goto err;
+ args->args.mknod.mode = ntoh32 (*(uint32_t *)blob);
+ blob += sizeof (uint32_t);
+ blob_len -= sizeof (uint32_t);
+
+ if (blob_len < sizeof (uint32_t))
+ goto err;
+ args->args.mknod.rdev = ntoh32 (*(uint32_t *)blob);
+ blob += sizeof (uint32_t);
+ blob_len -= sizeof (uint32_t);
+
+ if (blob_len < sizeof (uint32_t))
+ goto err;
+ args->args.mknod.umask = ntoh32 (*(uint32_t *)blob);
+ blob += sizeof (uint32_t);
+ blob_len -= sizeof (uint32_t);
+ }
+
+ if (blob_len)
+ goto err;
+
+ return args;
+
+err:
+ if (args)
+ ga_newfile_args_free (args);
+
+ return NULL;
+}
+
+ga_heal_args_t *
+ga_heal_parse_args (xlator_t *this, data_t *data)
+{
+ ga_heal_args_t *args = NULL;
+ ga_private_t *priv = NULL;
+ void *blob = NULL;
+ int len = 0;
+ int blob_len = 0;
+
+ blob = data->data;
+ blob_len = data->len;
+
+ priv = this->private;
+
+ /* bname should at least contain a character */
+ if (blob_len < (sizeof (args->gfid) + 2))
+ goto err;
+
+ args = mem_get0 (priv->heal_args_pool);
+ if (!args)
+ goto err;
+
+ memcpy (args->gfid, blob, sizeof (args->gfid));
+ blob += sizeof (args->gfid);
+ blob_len -= sizeof (args->gfid);
+
+ len = strnlen (blob, blob_len);
+ if (len == blob_len)
+ goto err;
+
+ args->bname = GF_CALLOC (1, len + 1, gf_common_mt_char);
+ if (!args->bname)
+ goto err;
+
+ memcpy (args->bname, blob, len);
+ blob_len -= (len + 1);
+
+ if (blob_len)
+ goto err;
+
+ return args;
+
+err:
+ if (args)
+ ga_heal_args_free (args);
+
+ return NULL;
+}
+
+static int32_t
+ga_fill_tmp_loc (loc_t *loc, xlator_t *this, char *gfid,
+ char *bname, dict_t *xdata, loc_t *new_loc)
+{
+ int ret = -1;
+ uint64_t value = 0;
+ inode_t *parent = NULL;
+
+ parent = loc->inode;
+ ret = inode_ctx_get (loc->inode, this, &value);
+ if (!ret) {
+ parent = (void *)value;
+ }
+
+ /* parent itself should be looked up */
+ uuid_copy (new_loc->pargfid, parent->gfid);
+ new_loc->parent = inode_ref (parent);
+
+ new_loc->inode = inode_grep (parent->table, parent, bname);
+ if (!new_loc->inode)
+ new_loc->inode = inode_new (parent->table);
+
+ loc_path (new_loc, bname);
+ new_loc->name = basename (new_loc->path);
+
+ /* As GFID would not be set on the entry yet, lets not send entry
+ gfid in the request */
+ /*uuid_copy (new_loc->gfid, (const unsigned char *)gfid); */
+
+ ret = dict_set_static_bin (xdata, "gfid-req", gfid, 16);
+ if (ret < 0)
+ goto out;
+
+ ret = 0;
+
+out:
+ return ret;
+}
+
+
+
+static gf_boolean_t
+__is_gfid_access_dir (uuid_t gfid)
+{
+ uuid_t aux_gfid;
+
+ memset (aux_gfid, 0, 16);
+ aux_gfid[15] = GF_AUX_GFID;
+
+ if (uuid_compare (gfid, aux_gfid) == 0)
+ return _gf_true;
+
+ return _gf_false;
+}
+
+int32_t
+ga_forget (xlator_t *this, inode_t *inode)
+{
+ int ret = -1;
+ uint64_t value = 0;
+ inode_t *tmp_inode = NULL;
+
+ ret = inode_ctx_del (inode, this, &value);
+ if (ret)
+ goto out;
+
+ tmp_inode = (void *)value;
+ inode_unref (tmp_inode);
+
+out:
+ return 0;
+}
+
+
+static int
+ga_heal_cbk (call_frame_t *frame, void *cookie, xlator_t *this,
+ int32_t op_ret, int32_t op_errno,
+ inode_t *inode, struct iatt *stat, dict_t *dict,
+ struct iatt *postparent)
+{
+ call_frame_t *orig_frame = NULL;
+
+ orig_frame = frame->local;
+ frame->local = NULL;
+
+ /* don't worry about inode linking and other stuff. They'll happen on
+ * the next lookup.
+ */
+ STACK_DESTROY (frame->root);
+
+ STACK_UNWIND_STRICT (setxattr, orig_frame, op_ret, op_errno, dict);
+
+ return 0;
+}
+
+static int
+ga_newentry_cbk (call_frame_t *frame, void *cookie, xlator_t *this,
+ int32_t op_ret, int32_t op_errno,
+ inode_t *inode, struct iatt *buf,
+ struct iatt *preparent, struct iatt *postparent,
+ dict_t *xdata)
+{
+ call_frame_t *orig_frame = NULL;
+
+ orig_frame = frame->local;
+ frame->local = NULL;
+
+ /* don't worry about inode linking and other stuff. They'll happen on
+ * the next lookup.
+ */
+ STACK_DESTROY (frame->root);
+
+ STACK_UNWIND_STRICT (setxattr, orig_frame, op_ret, op_errno, xdata);
+
+ return 0;
+}
+
+int32_t
+ga_new_entry (call_frame_t *frame, xlator_t *this, loc_t *loc, data_t *data,
+ dict_t *xdata)
+{
+ int ret = -1;
+ ga_newfile_args_t *args = NULL;
+ loc_t tmp_loc = {0,};
+ call_frame_t *new_frame = NULL;
+
+ args = ga_newfile_parse_args (this, data);
+ if (!args)
+ goto out;
+
+ if (!xdata)
+ xdata = dict_new ();
+
+ ret = ga_fill_tmp_loc (loc, this, args->gfid,
+ args->bname, xdata, &tmp_loc);
+ if (ret)
+ goto out;
+
+ new_frame = copy_frame (frame);
+ if (!new_frame)
+ goto out;
+ new_frame->local = (void *)frame;
+
+ new_frame->root->uid = args->uid;
+ new_frame->root->gid = args->gid;
+
+ if (S_ISDIR (args->st_mode)) {
+ STACK_WIND (new_frame, ga_newentry_cbk,
+ FIRST_CHILD(this), FIRST_CHILD(this)->fops->mkdir,
+ &tmp_loc, args->args.mkdir.mode,
+ args->args.mkdir.umask, xdata);
+ } else if (S_ISLNK (args->st_mode)) {
+ STACK_WIND (new_frame, ga_newentry_cbk,
+ FIRST_CHILD(this), FIRST_CHILD(this)->fops->symlink,
+ args->args.symlink.linkpath,
+ &tmp_loc, 0, xdata);
+ } else {
+ if (S_ISREG (args->st_mode)) {
+ ret = dict_set_uint32 (xdata,
+ GLUSTERFS_CREATE_MODE_KEY,
+ args->args.mknod.mode);
+ if (ret < 0) {
+ gf_log (THIS->name, GF_LOG_ERROR,
+ "failed to set the create-mode-key");
+ goto out;
+ }
+ args->args.mknod.mode = IA_IFREG;
+ }
+
+ STACK_WIND (new_frame, ga_newentry_cbk,
+ FIRST_CHILD(this), FIRST_CHILD(this)->fops->mknod,
+ &tmp_loc, args->args.mknod.mode,
+ args->args.mknod.rdev, args->args.mknod.umask,
+ xdata);
+ }
+
+ ret = 0;
+out:
+ ga_newfile_args_free (args);
+
+ return ret;
+}
+
+int32_t
+ga_heal_entry (call_frame_t *frame, xlator_t *this, loc_t *loc, data_t *data,
+ dict_t *xdata)
+{
+ int ret = -1;
+ ga_heal_args_t *args = NULL;
+ loc_t tmp_loc = {0,};
+ call_frame_t *new_frame = NULL;
+
+ args = ga_heal_parse_args (this, data);
+ if (!args)
+ goto out;
+
+ if (!xdata)
+ xdata = dict_new ();
+
+ ret = ga_fill_tmp_loc (loc, this, args->gfid, args->bname,
+ xdata, &tmp_loc);
+ if (ret)
+ goto out;
+
+ new_frame = copy_frame (frame);
+ if (!new_frame)
+ goto out;
+ new_frame->local = (void *)frame;
+
+ STACK_WIND (new_frame, ga_heal_cbk, FIRST_CHILD (this),
+ FIRST_CHILD(this)->fops->lookup,
+ &tmp_loc, xdata);
+
+ ret = 0;
+out:
+ if (args)
+ ga_heal_args_free (args);
+
+ return ret;
+}
+
+int32_t
+ga_setxattr_cbk (call_frame_t *frame, void *cookie, xlator_t *this,
+ int32_t op_ret, int32_t op_errno,
+ dict_t *xdata)
+{
+ STACK_UNWIND_STRICT (setxattr, frame, op_ret, op_errno, xdata);
+ return 0;
+}
+
+int32_t
+ga_setxattr (call_frame_t *frame, xlator_t *this, loc_t *loc, dict_t *dict,
+ int32_t flags, dict_t *xdata)
+{
+
+ data_t *data = NULL;
+ int op_errno = ENOMEM;
+ int ret = 0;
+ inode_t *unref = NULL;
+
+ if ((loc->name && !strcmp (GF_GFID_DIR, loc->name)) &&
+ ((loc->parent &&
+ __is_root_gfid (loc->parent->gfid)) ||
+ __is_root_gfid (loc->pargfid))) {
+ op_errno = EPERM;
+ goto err;
+ }
+
+ data = dict_get (dict, GF_FUSE_AUX_GFID_NEWFILE);
+ if (data) {
+ ret = ga_new_entry (frame, this, loc, data, xdata);
+ if (ret)
+ goto err;
+ return 0;
+ }
+
+ data = dict_get (dict, GF_FUSE_AUX_GFID_HEAL);
+ if (data) {
+ ret = ga_heal_entry (frame, this, loc, data, xdata);
+ if (ret)
+ goto err;
+ return 0;
+ }
+
+ /* now, check if the setxattr() is on gfid-path */
+ if (!((loc->parent &&
+ __is_gfid_access_dir (loc->parent->gfid)) ||
+ __is_gfid_access_dir (loc->pargfid))) {
+ goto wind;
+ }
+
+ GFID_ACCESS_GET_VALID_DIR_INODE (this, loc, unref, wind);
+
+wind:
+ STACK_WIND (frame, ga_setxattr_cbk, FIRST_CHILD(this),
+ FIRST_CHILD(this)->fops->setxattr, loc, dict, flags,
+ xdata);
+ if (unref)
+ inode_unref (unref);
+
+ return 0;
+err:
+ STACK_UNWIND_STRICT (setxattr, frame, -1, op_errno, xdata);
+ return 0;
+}
+
+
+int32_t
+ga_virtual_lookup_cbk (call_frame_t *frame, void *cookie, xlator_t *this,
+ int32_t op_ret, int32_t op_errno, inode_t *inode,
+ struct iatt *buf, dict_t *xdata, struct iatt *postparent)
+{
+ int j = 0;
+ int i = 0;
+ int ret = 0;
+ uint64_t temp_ino = 0;
+ inode_t *cbk_inode = NULL;
+ inode_t *true_inode = NULL;
+ uuid_t random_gfid = {0,};
+
+ if (frame->local)
+ cbk_inode = frame->local;
+ else
+ cbk_inode = inode;
+
+ frame->local = NULL;
+ if (op_ret)
+ goto unwind;
+
+ if (!IA_ISDIR (buf->ia_type))
+ goto unwind;
+
+ /* need to send back a different inode for linking in itable */
+ if (cbk_inode == inode) {
+ /* check if the inode is in the 'itable' or
+ if its just previously discover()'d inode */
+ true_inode = inode_find (inode->table, buf->ia_gfid);
+ if (!true_inode) {
+ cbk_inode = inode_new (inode->table);
+
+ if (!cbk_inode) {
+ op_ret = -1;
+ op_errno = ENOMEM;
+ goto unwind;
+ }
+ /* the inode is not present in itable, ie, the actual
+ path is not yet looked up. Use the current inode
+ itself for now */
+ inode_ref (inode);
+ } else {
+ /* 'inode_ref()' has been done in inode_find() */
+ inode = true_inode;
+ }
+
+ ret = inode_ctx_put (cbk_inode, this, (uint64_t)inode);
+ if (ret) {
+ gf_log (this->name, GF_LOG_WARNING,
+ "failed to set the inode ctx with"
+ "the actual inode");
+ if (inode)
+ inode_unref (inode);
+ }
+ inode = NULL;
+ }
+
+ if (!uuid_is_null (cbk_inode->gfid)) {
+ /* if the previous linked inode is used, use the
+ same gfid */
+ uuid_copy (random_gfid, cbk_inode->gfid);
+ } else {
+ /* replace the buf->ia_gfid to a random gfid
+ for directory, for files, what we received is fine */
+ uuid_generate (random_gfid);
+ }
+
+ uuid_copy (buf->ia_gfid, random_gfid);
+
+ for (i = 15; i > (15 - 8); i--) {
+ temp_ino += (uint64_t)(buf->ia_gfid[i]) << j;
+ j += 8;
+ }
+ buf->ia_ino = temp_ino;
+
+unwind:
+ STACK_UNWIND_STRICT (lookup, frame, op_ret, op_errno, cbk_inode, buf,
+ xdata, postparent);
+
+ return 0;
+}
+
+int32_t
+ga_lookup_cbk (call_frame_t *frame, void *cookie, xlator_t *this,
+ int32_t op_ret, int32_t op_errno, inode_t *inode,
+ struct iatt *buf, dict_t *xdata, struct iatt *postparent)
+{
+ ga_private_t *priv = NULL;
+
+ /* if the entry in question is not 'root',
+ then follow the normal path */
+ if (op_ret || !__is_root_gfid(buf->ia_gfid))
+ goto unwind;
+
+ priv = this->private;
+
+ /* do we need to copy root stbuf everytime? */
+ /* mostly yes, as we want to have the 'stat' info show latest
+ in every _cbk() */
+
+ /* keep the reference for root stat buf */
+ priv->root_stbuf = *buf;
+ priv->gfiddir_stbuf = priv->root_stbuf;
+ priv->gfiddir_stbuf.ia_gfid[15] = GF_AUX_GFID;
+ priv->gfiddir_stbuf.ia_ino = GF_AUX_GFID;
+
+unwind:
+ STACK_UNWIND_STRICT (lookup, frame, op_ret, op_errno, inode, buf,
+ xdata, postparent);
+ return 0;
+}
+
+int32_t
+ga_lookup (call_frame_t *frame, xlator_t *this, loc_t *loc, dict_t *xdata)
+{
+ ga_private_t *priv = NULL;
+ int ret = -1;
+ uuid_t tmp_gfid = {0,};
+ loc_t tmp_loc = {0,};
+ uint64_t value = 0;
+ inode_t *inode = NULL;
+ inode_t *true_inode = NULL;
+ int32_t op_errno = ENOENT;
+
+ /* if its discover(), no need for any action here */
+ if (!loc->name)
+ goto wind;
+
+ /* if its revalidate, and inode is not of type directory,
+ proceed with 'wind' */
+ if (loc->inode && loc->inode->ia_type &&
+ !IA_ISDIR (loc->inode->ia_type))
+ goto wind;
+
+ priv = this->private;
+
+ /* need to check if the lookup is on virtual dir */
+ if ((loc->name && !strcmp (GF_GFID_DIR, loc->name)) &&
+ ((loc->parent && __is_root_gfid (loc->parent->gfid)) ||
+ __is_root_gfid (loc->pargfid))) {
+ /* this means, the query is on '/.gfid', return the fake stat,
+ and say success */
+
+ STACK_UNWIND_STRICT (lookup, frame, 0, 0, loc->inode,
+ &priv->gfiddir_stbuf, xdata,
+ &priv->root_stbuf);
+ return 0;
+ }
+
+ /* now, check if the lookup() is on an existing entry,
+ but on gfid-path */
+ if (!((loc->parent && __is_gfid_access_dir (loc->parent->gfid)) ||
+ __is_gfid_access_dir (loc->pargfid)))
+ goto wind;
+
+ /* make sure the 'basename' is actually a 'canonical-gfid',
+ otherwise, return error */
+ ret = uuid_parse (loc->name, tmp_gfid);
+ if (ret)
+ goto err;
+
+ /* if its fresh lookup, go ahead and send it down, if not,
+ for directory, we need indirection to actual dir inode */
+ if (!(loc->inode && loc->inode->ia_type))
+ goto discover;
+
+ /* revalidate on directory */
+ ret = inode_ctx_get (loc->inode, this, &value);
+ if (ret)
+ goto err;
+
+ inode = (void *)value;
+
+ /* valid inode, already looked up, work on that */
+ if (inode->ia_type)
+ goto discover;
+
+ /* check if the inode is in the 'itable' or
+ if its just previously discover()'d inode */
+ true_inode = inode_find (loc->inode->table, tmp_gfid);
+ if (true_inode) {
+ /* time do another lookup and update the context
+ with proper inode */
+ op_errno = ESTALE;
+ goto err;
+ }
+
+discover:
+ /* for the virtual entries, we don't need to send 'gfid-req' key, as
+ for these entries, we don't want to 'set' a new gfid */
+ if (xdata)
+ dict_del (xdata, "gfid-req");
+
+ uuid_copy (tmp_loc.gfid, tmp_gfid);
+
+ /* if revalidate, then we need to have the proper reference */
+ if (inode) {
+ tmp_loc.inode = inode_ref (inode);
+ frame->local = loc->inode;
+ } else {
+ tmp_loc.inode = inode_ref (loc->inode);
+ }
+
+ STACK_WIND (frame, ga_virtual_lookup_cbk, FIRST_CHILD(this),
+ FIRST_CHILD(this)->fops->lookup, &tmp_loc, xdata);
+
+ inode_unref (tmp_loc.inode);
+
+ return 0;
+
+wind:
+ /* used for all the normal lookup path */
+ STACK_WIND (frame, ga_lookup_cbk, FIRST_CHILD(this),
+ FIRST_CHILD(this)->fops->lookup, loc, xdata);
+
+ return 0;
+
+err:
+ STACK_UNWIND_STRICT (lookup, frame, -1, op_errno, loc->inode,
+ &priv->gfiddir_stbuf, xdata,
+ &priv->root_stbuf);
+ return 0;
+}
+
+int
+ga_mkdir (call_frame_t *frame, xlator_t *this, loc_t *loc, mode_t mode,
+ mode_t umask, dict_t *xdata)
+{
+ int op_errno = 0;
+
+ GFID_ACCESS_ENTRY_OP_CHECK (loc, op_errno, err);
+
+ STACK_WIND (frame, default_mkdir_cbk, FIRST_CHILD(this),
+ FIRST_CHILD(this)->fops->mkdir, loc, mode, umask,
+ xdata);
+
+ return 0;
+
+err:
+ STACK_UNWIND_STRICT (mkdir, frame, -1, op_errno, loc->inode,
+ NULL, NULL, NULL, xdata);
+ return 0;
+}
+
+
+int
+ga_create (call_frame_t *frame, xlator_t *this, loc_t *loc, int flags,
+ mode_t mode, mode_t umask, fd_t *fd, dict_t *xdata)
+{
+ int op_errno = 0;
+
+ GFID_ACCESS_ENTRY_OP_CHECK (loc, op_errno, err);
+
+ STACK_WIND (frame, default_create_cbk,
+ FIRST_CHILD(this), FIRST_CHILD(this)->fops->create,
+ loc, flags, mode, umask, fd, xdata);
+ return 0;
+err:
+ STACK_UNWIND_STRICT (create, frame, -1, op_errno, NULL,
+ NULL, NULL, NULL, NULL, xdata);
+
+ return 0;
+
+}
+
+int
+ga_symlink (call_frame_t *frame, xlator_t *this, const char *linkname,
+ loc_t *loc, mode_t umask, dict_t *xdata)
+{
+ int op_errno = 0;
+
+ GFID_ACCESS_ENTRY_OP_CHECK (loc, op_errno, err);
+
+ STACK_WIND (frame, default_symlink_cbk,
+ FIRST_CHILD(this), FIRST_CHILD(this)->fops->symlink,
+ linkname, loc, umask, xdata);
+ return 0;
+err:
+ STACK_UNWIND_STRICT (symlink, frame, -1, op_errno, NULL,
+ NULL, NULL, NULL, xdata);
+
+ return 0;
+}
+
+int
+ga_mknod (call_frame_t *frame, xlator_t *this, loc_t *loc, mode_t mode,
+ dev_t rdev, mode_t umask, dict_t *xdata)
+{
+ int op_errno = 0;
+
+ GFID_ACCESS_ENTRY_OP_CHECK (loc, op_errno, err);
+
+ STACK_WIND (frame, default_mknod_cbk, FIRST_CHILD(this),
+ FIRST_CHILD(this)->fops->mknod, loc, mode, rdev,
+ umask, xdata);
+
+ return 0;
+err:
+ STACK_UNWIND_STRICT (mknod, frame, -1, op_errno, NULL,
+ NULL, NULL, NULL, xdata);
+
+ return 0;
+}
+
+int
+ga_rmdir (call_frame_t *frame, xlator_t *this, loc_t *loc, int flag,
+ dict_t *xdata)
+{
+ int op_errno = 0;
+ inode_t *unref = NULL;
+
+ GFID_ACCESS_ENTRY_OP_CHECK (loc, op_errno, err);
+
+ GFID_ACCESS_GET_VALID_DIR_INODE (this, loc, unref, wind);
+
+wind:
+ STACK_WIND (frame, default_rmdir_cbk,
+ FIRST_CHILD(this), FIRST_CHILD(this)->fops->rmdir,
+ loc, flag, xdata);
+ if (unref)
+ inode_unref (unref);
+
+ return 0;
+err:
+ STACK_UNWIND_STRICT (rmdir, frame, -1, op_errno, NULL,
+ NULL, xdata);
+
+ return 0;
+}
+
+int
+ga_unlink (call_frame_t *frame, xlator_t *this, loc_t *loc, int32_t xflag,
+ dict_t *xdata)
+{
+ int op_errno = 0;
+ inode_t *unref = NULL;
+
+ GFID_ACCESS_ENTRY_OP_CHECK (loc, op_errno, err);
+
+ GFID_ACCESS_GET_VALID_DIR_INODE (this, loc, unref, wind);
+
+wind:
+ STACK_WIND (frame, default_unlink_cbk,
+ FIRST_CHILD(this), FIRST_CHILD(this)->fops->unlink,
+ loc, xflag, xdata);
+
+ if (unref)
+ inode_unref (unref);
+
+ return 0;
+err:
+ STACK_UNWIND_STRICT (unlink, frame, -1, op_errno, NULL,
+ NULL, xdata);
+
+ return 0;
+}
+
+int
+ga_rename (call_frame_t *frame, xlator_t *this,
+ loc_t *oldloc, loc_t *newloc, dict_t *xdata)
+{
+ int op_errno = 0;
+ inode_t *oldloc_unref = NULL;
+ inode_t *newloc_unref = NULL;
+
+ GFID_ACCESS_ENTRY_OP_CHECK (oldloc, op_errno, err);
+ GFID_ACCESS_ENTRY_OP_CHECK (newloc, op_errno, err);
+
+ GFID_ACCESS_GET_VALID_DIR_INODE (this, oldloc, oldloc_unref,
+ handle_newloc);
+
+handle_newloc:
+ GFID_ACCESS_GET_VALID_DIR_INODE (this, newloc, newloc_unref, wind);
+
+wind:
+ STACK_WIND (frame, default_rename_cbk,
+ FIRST_CHILD(this), FIRST_CHILD(this)->fops->rename,
+ oldloc, newloc, xdata);
+
+ if (oldloc_unref)
+ inode_unref (oldloc_unref);
+
+ if (newloc_unref)
+ inode_unref (newloc_unref);
+
+ return 0;
+err:
+ STACK_UNWIND_STRICT (rename, frame, -1, op_errno, NULL,
+ NULL, NULL, NULL, NULL, xdata);
+
+ return 0;
+}
+
+
+int
+ga_link (call_frame_t *frame, xlator_t *this,
+ loc_t *oldloc, loc_t *newloc, dict_t *xdata)
+{
+ int op_errno = 0;
+ inode_t *oldloc_unref = NULL;
+ inode_t *newloc_unref = NULL;
+
+ GFID_ACCESS_ENTRY_OP_CHECK (oldloc, op_errno, err);
+ GFID_ACCESS_ENTRY_OP_CHECK (newloc, op_errno, err);
+
+ GFID_ACCESS_GET_VALID_DIR_INODE (this, oldloc, oldloc_unref,
+ handle_newloc);
+
+handle_newloc:
+ GFID_ACCESS_GET_VALID_DIR_INODE (this, newloc, newloc_unref, wind);
+
+wind:
+ STACK_WIND (frame, default_link_cbk,
+ FIRST_CHILD(this), FIRST_CHILD(this)->fops->link,
+ oldloc, newloc, xdata);
+
+ if (oldloc_unref)
+ inode_unref (oldloc_unref);
+
+ if (newloc_unref)
+ inode_unref (newloc_unref);
+
+ return 0;
+err:
+ STACK_UNWIND_STRICT (link, frame, -1, op_errno, NULL,
+ NULL, NULL, NULL, xdata);
+
+ return 0;
+}
+
+int32_t
+ga_opendir (call_frame_t *frame, xlator_t *this, loc_t *loc,
+ fd_t *fd, dict_t *xdata)
+{
+ int op_errno = 0;
+
+ GFID_ACCESS_ENTRY_OP_CHECK (loc, op_errno, err);
+
+ /* also check if the loc->inode itself is virtual
+ inode, if yes, return with failure, mainly because we
+ can't handle all the readdirp and other things on it. */
+ if (inode_ctx_get (loc->inode, this, NULL) == 0) {
+ op_errno = ENOTSUP;
+ goto err;
+ }
+
+ STACK_WIND (frame, default_opendir_cbk,
+ FIRST_CHILD(this), FIRST_CHILD(this)->fops->opendir,
+ loc, fd, xdata);
+ return 0;
+err:
+ STACK_UNWIND_STRICT (opendir, frame, -1, op_errno, NULL, xdata);
+
+ return 0;
+}
+
+int32_t
+ga_getxattr (call_frame_t *frame, xlator_t *this, loc_t *loc,
+ const char *name, dict_t *xdata)
+{
+ inode_t *unref = NULL;
+
+ GFID_ACCESS_GET_VALID_DIR_INODE (this, loc, unref, wind);
+
+wind:
+ STACK_WIND (frame, default_getxattr_cbk, FIRST_CHILD(this),
+ FIRST_CHILD(this)->fops->getxattr, loc, name, xdata);
+
+ if (unref)
+ inode_unref (unref);
+
+ return 0;
+}
+
+int32_t
+ga_stat (call_frame_t *frame, xlator_t *this, loc_t *loc,
+ dict_t *xdata)
+{
+ inode_t *unref = NULL;
+
+ GFID_ACCESS_GET_VALID_DIR_INODE (this, loc, unref, wind);
+
+wind:
+ STACK_WIND (frame, default_stat_cbk, FIRST_CHILD(this),
+ FIRST_CHILD(this)->fops->stat, loc, xdata);
+ if (unref)
+ inode_unref (unref);
+
+ return 0;
+}
+
+int32_t
+ga_setattr (call_frame_t *frame, xlator_t *this, loc_t *loc,
+ struct iatt *stbuf, int32_t valid,
+ dict_t *xdata)
+{
+ inode_t *unref = NULL;
+
+ GFID_ACCESS_GET_VALID_DIR_INODE (this, loc, unref, wind);
+
+wind:
+ STACK_WIND (frame, default_setattr_cbk, FIRST_CHILD (this),
+ FIRST_CHILD (this)->fops->setattr, loc, stbuf, valid,
+ xdata);
+ if (unref)
+ inode_unref (unref);
+
+ return 0;
+}
+
+int32_t
+ga_removexattr (call_frame_t *frame, xlator_t *this, loc_t *loc,
+ const char *name, dict_t *xdata)
+{
+ inode_t *unref = NULL;
+
+ GFID_ACCESS_GET_VALID_DIR_INODE (this, loc, unref, wind);
+
+wind:
+ STACK_WIND (frame, default_removexattr_cbk, FIRST_CHILD(this),
+ FIRST_CHILD(this)->fops->removexattr, loc, name,
+ xdata);
+ if (unref)
+ inode_unref (unref);
+
+ return 0;
+}
+
+
+int32_t
+mem_acct_init (xlator_t *this)
+{
+ int ret = -1;
+
+ if (!this)
+ return ret;
+
+ ret = xlator_mem_acct_init (this, gf_gfid_access_mt_end + 1);
+
+ if (ret != 0) {
+ gf_log (this->name, GF_LOG_WARNING, "Memory accounting"
+ " init failed");
+ return ret;
+ }
+
+ return ret;
+}
+
+int32_t
+init (xlator_t *this)
+{
+ ga_private_t *priv = NULL;
+ int ret = -1;
+
+ if (!this->children || this->children->next) {
+ gf_log (this->name, GF_LOG_ERROR,
+ "not configured with exactly one child. exiting");
+ goto out;
+ }
+
+ /* This can be the top of graph in certain cases */
+ if (!this->parents) {
+ gf_log (this->name, GF_LOG_DEBUG,
+ "dangling volume. check volfile ");
+ }
+
+ /* TODO: define a mem-type structure */
+ priv = GF_CALLOC (1, sizeof (*priv), gf_gfid_access_mt_priv_t);
+ if (!priv)
+ goto out;
+
+ priv->newfile_args_pool = mem_pool_new (ga_newfile_args_t, 512);
+ if (!priv->newfile_args_pool)
+ goto out;
+
+ priv->heal_args_pool = mem_pool_new (ga_heal_args_t, 512);
+ if (!priv->heal_args_pool)
+ goto out;
+
+ this->private = priv;
+
+ ret = 0;
+out:
+ if (ret && priv) {
+ if (priv->newfile_args_pool)
+ mem_pool_destroy (priv->newfile_args_pool);
+ GF_FREE (priv);
+ }
+
+ return ret;
+}
+
+void
+fini (xlator_t *this)
+{
+ ga_private_t *priv = NULL;
+ priv = this->private;
+ this->private = NULL;
+
+ if (priv) {
+ if (priv->newfile_args_pool)
+ mem_pool_destroy (priv->newfile_args_pool);
+ if (priv->heal_args_pool)
+ mem_pool_destroy (priv->heal_args_pool);
+ GF_FREE (priv);
+ }
+
+ return;
+}
+
+
+struct xlator_fops fops = {
+ .lookup = ga_lookup,
+
+ /* entry fops */
+ .mkdir = ga_mkdir,
+ .mknod = ga_mknod,
+ .create = ga_create,
+ .symlink = ga_symlink,
+ .link = ga_link,
+ .unlink = ga_unlink,
+ .rmdir = ga_rmdir,
+ .rename = ga_rename,
+
+ /* handle any other directory operations here */
+ .opendir = ga_opendir,
+ .stat = ga_stat,
+ .setattr = ga_setattr,
+ .getxattr = ga_getxattr,
+ .removexattr = ga_removexattr,
+
+ /* special fop to handle more entry creations */
+ .setxattr = ga_setxattr,
+};
+
+struct xlator_cbks cbks = {
+ .forget = ga_forget,
+};
+
+struct volume_options options[] = {
+ /* This translator doesn't take any options, or provide any options */
+ { .key = {NULL} },
+};
diff --git a/xlators/features/gfid-access/src/gfid-access.h b/xlators/features/gfid-access/src/gfid-access.h
new file mode 100644
index 0000000..e13c9b7
--- /dev/null
+++ b/xlators/features/gfid-access/src/gfid-access.h
@@ -0,0 +1,128 @@
+/*
+ Copyright (c) 2013 Red Hat, Inc. <http://www.redhat.com>
+ This file is part of GlusterFS.
+
+ This file is licensed to you under your choice of the GNU Lesser
+ General Public License, version 3 or any later version (LGPLv3 or
+ later), or the GNU General Public License, version 2 (GPLv2), in all
+ cases as published by the Free Software Foundation.
+*/
+#ifndef __GFID_ACCESS_H__
+#define __GFID_ACCESS_H__
+
+#ifndef _CONFIG_H
+#define _CONFIG_H
+#include "config.h"
+#endif
+
+#include "glusterfs.h"
+#include "logging.h"
+#include "dict.h"
+#include "xlator.h"
+#include "defaults.h"
+#include "gfid-access-mem-types.h"
+
+#define UUID_CANONICAL_FORM_LEN 36
+
+#define GF_FUSE_AUX_GFID_NEWFILE "glusterfs.gfid.newfile"
+#define GF_FUSE_AUX_GFID_HEAL "glusterfs.gfid.heal"
+
+#define GF_GFID_KEY "GLUSTERFS_GFID"
+#define GF_GFID_DIR ".gfid"
+#define GF_AUX_GFID 0xd
+
+#define GFID_ACCESS_GET_VALID_DIR_INODE(x,l,unref,lbl) do { \
+ int ret = 0; \
+ uint64_t value = 0; \
+ inode_t *tmp_inode = NULL; \
+ \
+ /* if its an entry operation, on the virtual */ \
+ /* directory inode as parent, we need to handle */ \
+ /* it properly */ \
+ if (l->parent) { \
+ ret = inode_ctx_get (l->parent, x, &value); \
+ if (ret) \
+ goto lbl; \
+ tmp_inode = (inode_t *)value; \
+ unref = inode_ref (tmp_inode); \
+ l->parent = tmp_inode; \
+ /* if parent is virtual, no need to handle */ \
+ /* loc->inode */ \
+ break; \
+ } \
+ \
+ /* if its an inode operation, on the virtual */ \
+ /* directory inode itself, we need to handle */ \
+ /* it properly */ \
+ if (l->inode) { \
+ ret = inode_ctx_get (l->inode, x, &value); \
+ if (ret) \
+ goto lbl; \
+ tmp_inode = (inode_t *)value; \
+ unref = inode_ref (tmp_inode); \
+ l->inode = tmp_inode; \
+ } \
+ \
+ } while (0)
+
+#define GFID_ACCESS_ENTRY_OP_CHECK(loc,err,lbl) do { \
+ /* need to check if the lookup is on virtual dir */ \
+ if ((loc->name && !strcmp (GF_GFID_DIR, loc->name)) && \
+ ((loc->parent && \
+ __is_root_gfid (loc->parent->gfid)) || \
+ __is_root_gfid (loc->pargfid))) { \
+ err = EEXIST; \
+ goto lbl; \
+ } \
+ \
+ /* now, check if the lookup() is on an existing */ \
+ /* entry, but on gfid-path */ \
+ if ((loc->parent && \
+ __is_gfid_access_dir (loc->parent->gfid)) || \
+ __is_gfid_access_dir (loc->pargfid)) { \
+ err = EPERM; \
+ goto lbl; \
+ } \
+ } while (0)
+
+
+typedef struct {
+ unsigned int uid;
+ unsigned int gid;
+ char gfid[UUID_CANONICAL_FORM_LEN + 1];
+ unsigned int st_mode;
+ char *bname;
+
+ union {
+ struct _symlink_in {
+ char *linkpath;
+ } __attribute__ ((__packed__)) symlink;
+
+ struct _mknod_in {
+ unsigned int mode;
+ unsigned int rdev;
+ unsigned int umask;
+ } __attribute__ ((__packed__)) mknod;
+
+ struct _mkdir_in {
+ unsigned int mode;
+ unsigned int umask;
+ } __attribute__ ((__packed__)) mkdir;
+ } __attribute__ ((__packed__)) args;
+} __attribute__((__packed__)) ga_newfile_args_t;
+
+typedef struct {
+ char gfid[UUID_CANONICAL_FORM_LEN + 1];
+ char *bname; /* a null terminated basename */
+} __attribute__((__packed__)) ga_heal_args_t;
+
+struct ga_private {
+ /* root inode's stbuf */
+ struct iatt root_stbuf;
+ struct iatt gfiddir_stbuf;
+ struct mem_pool *newfile_args_pool;
+ struct mem_pool *heal_args_pool;
+};
+typedef struct ga_private ga_private_t;
+
+#endif /* __GFID_ACCESS_H__ */