fs/orangefs/namei.c - kernel/msm-4.19 - Gitiles

 // SPDX-License-Identifier: GPL-2.0
 /*
  * (C) 2001 Clemson University and The University of Chicago
  *
  * See COPYING in top-level directory.
  */

 /*
  *  Linux VFS namei operations.
  */

 #include "protocol.h"
 #include "orangefs-kernel.h"

 /*
  * Get a newly allocated inode to go with a negative dentry.
  */
 static int orangefs_create(struct inode *dir,
 			struct dentry *dentry,
 			umode_t mode,
 			bool exclusive)
 {
 	struct orangefs_inode_s *parent = ORANGEFS_I(dir);
 	struct orangefs_kernel_op_s *new_op;
 	struct orangefs_object_kref ref;
 	struct inode *inode;
 	struct iattr iattr;
 	int ret;

 	gossip_debug(GOSSIP_NAME_DEBUG, "%s: %pd\n",
 		     __func__,
 		     dentry);

 	new_op = op_alloc(ORANGEFS_VFS_OP_CREATE);
 	if (!new_op)
 		return -ENOMEM;

 	new_op->upcall.req.create.parent_refn = parent->refn;

 	fill_default_sys_attrs(new_op->upcall.req.create.attributes,
 			       ORANGEFS_TYPE_METAFILE, mode);

 	strncpy(new_op->upcall.req.create.d_name,
 		dentry->d_name.name, ORANGEFS_NAME_MAX);

 	ret = service_operation(new_op, __func__, get_interruptible_flag(dir));

 	gossip_debug(GOSSIP_NAME_DEBUG,
 		     "%s: %pd: handle:%pU: fsid:%d: new_op:%p: ret:%d:\n",
 		     __func__,
 		     dentry,
 		     &new_op->downcall.resp.create.refn.khandle,
 		     new_op->downcall.resp.create.refn.fs_id,
 		     new_op,
 		     ret);

 	if (ret < 0)
 		goto out;

 	ref = new_op->downcall.resp.create.refn;
 	op_release(new_op);

 	inode = orangefs_new_inode(dir->i_sb, dir, S_IFREG | mode, 0, &ref);
 	if (IS_ERR(inode)) {
 		gossip_err("%s: Failed to allocate inode for file :%pd:\n",
 			   __func__,
 			   dentry);
 		ret = PTR_ERR(inode);
 		goto out;
 	}

 	gossip_debug(GOSSIP_NAME_DEBUG,
 		     "%s: Assigned inode :%pU: for file :%pd:\n",
 		     __func__,
 		     get_khandle_from_ino(inode),
 		     dentry);

 	d_instantiate(dentry, inode);
 	unlock_new_inode(inode);
 	orangefs_set_timeout(dentry);
 	ORANGEFS_I(inode)->getattr_time = jiffies - 1;
 	ORANGEFS_I(inode)->getattr_mask = STATX_BASIC_STATS;

 	gossip_debug(GOSSIP_NAME_DEBUG,
 		     "%s: dentry instantiated for %pd\n",
 		     __func__,
 		     dentry);

 	dir->i_mtime = dir->i_ctime = current_time(dir);
 	memset(&iattr, 0, sizeof iattr);
 	iattr.ia_valid |= ATTR_MTIME;
 	orangefs_inode_setattr(dir, &iattr);
 	mark_inode_dirty_sync(dir);
 	ret = 0;
 out:
 	gossip_debug(GOSSIP_NAME_DEBUG,
 		     "%s: %pd: returning %d\n",
 		     __func__,
 		     dentry,
 		     ret);
 	return ret;
 }

 /*
  * Attempt to resolve an object name (dentry->d_name), parent handle, and
  * fsid into a handle for the object.
  */
 static struct dentry *orangefs_lookup(struct inode *dir, struct dentry *dentry,
 				   unsigned int flags)
 {
 	struct orangefs_inode_s *parent = ORANGEFS_I(dir);
 	struct orangefs_kernel_op_s *new_op;
 	struct inode *inode;
 	struct dentry *res;
 	int ret = -EINVAL;

 	/*
 	 * in theory we could skip a lookup here (if the intent is to
 	 * create) in order to avoid a potentially failed lookup, but
 	 * leaving it in can skip a valid lookup and try to create a file
 	 * that already exists (e.g. the vfs already handles checking for
 	 * -EEXIST on O_EXCL opens, which is broken if we skip this lookup
 	 * in the create path)
 	 */
 	gossip_debug(GOSSIP_NAME_DEBUG, "%s called on %pd\n",
 		     __func__, dentry);

 	if (dentry->d_name.len > (ORANGEFS_NAME_MAX - 1))
 		return ERR_PTR(-ENAMETOOLONG);

 	new_op = op_alloc(ORANGEFS_VFS_OP_LOOKUP);
 	if (!new_op)
 		return ERR_PTR(-ENOMEM);

 	new_op->upcall.req.lookup.sym_follow = ORANGEFS_LOOKUP_LINK_NO_FOLLOW;

 	gossip_debug(GOSSIP_NAME_DEBUG, "%s:%s:%d using parent %pU\n",
 		     __FILE__,
 		     __func__,
 		     __LINE__,
 		     &parent->refn.khandle);
 	new_op->upcall.req.lookup.parent_refn = parent->refn;

 	strncpy(new_op->upcall.req.lookup.d_name, dentry->d_name.name,
 		ORANGEFS_NAME_MAX);

 	gossip_debug(GOSSIP_NAME_DEBUG,
 		     "%s: doing lookup on %s under %pU,%d\n",
 		     __func__,
 		     new_op->upcall.req.lookup.d_name,
 		     &new_op->upcall.req.lookup.parent_refn.khandle,
 		     new_op->upcall.req.lookup.parent_refn.fs_id);

 	ret = service_operation(new_op, __func__, get_interruptible_flag(dir));

 	gossip_debug(GOSSIP_NAME_DEBUG,
 		     "Lookup Got %pU, fsid %d (ret=%d)\n",
 		     &new_op->downcall.resp.lookup.refn.khandle,
 		     new_op->downcall.resp.lookup.refn.fs_id,
 		     ret);

 	if (ret < 0) {
 		if (ret == -ENOENT) {
 			/*
 			 * if no inode was found, add a negative dentry to
 			 * dcache anyway; if we don't, we don't hold expected
 			 * lookup semantics and we most noticeably break
 			 * during directory renames.
 			 *
 			 * however, if the operation failed or exited, do not
 			 * add the dentry (e.g. in the case that a touch is
 			 * issued on a file that already exists that was
 			 * interrupted during this lookup -- no need to add
 			 * another negative dentry for an existing file)
 			 */

 			gossip_debug(GOSSIP_NAME_DEBUG,
 				     "orangefs_lookup: Adding *negative* dentry "
 				     "%p for %pd\n",
 				     dentry,
 				     dentry);

 			d_add(dentry, NULL);
 			res = NULL;
 			goto out;
 		}

 		/* must be a non-recoverable error */
 		res = ERR_PTR(ret);
 		goto out;
 	}

 	orangefs_set_timeout(dentry);

 	inode = orangefs_iget(dir->i_sb, &new_op->downcall.resp.lookup.refn);
 	if (IS_ERR(inode)) {
 		gossip_debug(GOSSIP_NAME_DEBUG,
 			"error %ld from iget\n", PTR_ERR(inode));
 		res = ERR_CAST(inode);
 		goto out;
 	}

 	gossip_debug(GOSSIP_NAME_DEBUG,
 		     "%s:%s:%d "
 		     "Found good inode [%lu] with count [%d]\n",
 		     __FILE__,
 		     __func__,
 		     __LINE__,
 		     inode->i_ino,
 		     (int)atomic_read(&inode->i_count));

 	/* update dentry/inode pair into dcache */
 	res = d_splice_alias(inode, dentry);

 	gossip_debug(GOSSIP_NAME_DEBUG,
 		     "Lookup success (inode ct = %d)\n",
 		     (int)atomic_read(&inode->i_count));
 out:
 	op_release(new_op);
 	return res;
 }

 /* return 0 on success; non-zero otherwise */
 static int orangefs_unlink(struct inode *dir, struct dentry *dentry)
 {
 	struct inode *inode = dentry->d_inode;
 	struct orangefs_inode_s *parent = ORANGEFS_I(dir);
 	struct orangefs_kernel_op_s *new_op;
 	struct iattr iattr;
 	int ret;

 	gossip_debug(GOSSIP_NAME_DEBUG,
 		     "%s: called on %pd\n"
 		     "  (inode %pU): Parent is %pU | fs_id %d\n",
 		     __func__,
 		     dentry,
 		     get_khandle_from_ino(inode),
 		     &parent->refn.khandle,
 		     parent->refn.fs_id);

 	new_op = op_alloc(ORANGEFS_VFS_OP_REMOVE);
 	if (!new_op)
 		return -ENOMEM;

 	new_op->upcall.req.remove.parent_refn = parent->refn;
 	strncpy(new_op->upcall.req.remove.d_name, dentry->d_name.name,
 		ORANGEFS_NAME_MAX);

 	ret = service_operation(new_op, "orangefs_unlink",
 				get_interruptible_flag(inode));

 	gossip_debug(GOSSIP_NAME_DEBUG,
 		     "%s: service_operation returned:%d:\n",
 		     __func__,
 		     ret);

 	op_release(new_op);

 	if (!ret) {
 		drop_nlink(inode);

 		dir->i_mtime = dir->i_ctime = current_time(dir);
 		memset(&iattr, 0, sizeof iattr);
 		iattr.ia_valid |= ATTR_MTIME;
 		orangefs_inode_setattr(dir, &iattr);
 		mark_inode_dirty_sync(dir);
 	}
 	return ret;
 }

 static int orangefs_symlink(struct inode *dir,
 			 struct dentry *dentry,
 			 const char *symname)
 {
 	struct orangefs_inode_s *parent = ORANGEFS_I(dir);
 	struct orangefs_kernel_op_s *new_op;
 	struct orangefs_object_kref ref;
 	struct inode *inode;
 	struct iattr iattr;
 	int mode = 755;
 	int ret;

 	gossip_debug(GOSSIP_NAME_DEBUG, "%s: called\n", __func__);

 	if (!symname)
 		return -EINVAL;

 	if (strlen(symname)+1 > ORANGEFS_NAME_MAX)
 		return -ENAMETOOLONG;

 	new_op = op_alloc(ORANGEFS_VFS_OP_SYMLINK);
 	if (!new_op)
 		return -ENOMEM;

 	new_op->upcall.req.sym.parent_refn = parent->refn;

 	fill_default_sys_attrs(new_op->upcall.req.sym.attributes,
 			       ORANGEFS_TYPE_SYMLINK,
 			       mode);

 	strncpy(new_op->upcall.req.sym.entry_name,
 		dentry->d_name.name,
 		ORANGEFS_NAME_MAX);
 	strncpy(new_op->upcall.req.sym.target, symname, ORANGEFS_NAME_MAX);

 	ret = service_operation(new_op, __func__, get_interruptible_flag(dir));

 	gossip_debug(GOSSIP_NAME_DEBUG,
 		     "Symlink Got ORANGEFS handle %pU on fsid %d (ret=%d)\n",
 		     &new_op->downcall.resp.sym.refn.khandle,
 		     new_op->downcall.resp.sym.refn.fs_id, ret);

 	if (ret < 0) {
 		gossip_debug(GOSSIP_NAME_DEBUG,
 			    "%s: failed with error code %d\n",
 			    __func__, ret);
 		goto out;
 	}

 	ref = new_op->downcall.resp.sym.refn;
 	op_release(new_op);

 	inode = orangefs_new_inode(dir->i_sb, dir, S_IFLNK | mode, 0, &ref);
 	if (IS_ERR(inode)) {
 		gossip_err
 		    ("*** Failed to allocate orangefs symlink inode\n");
 		ret = PTR_ERR(inode);
 		goto out;
 	}

 	gossip_debug(GOSSIP_NAME_DEBUG,
 		     "Assigned symlink inode new number of %pU\n",
 		     get_khandle_from_ino(inode));

 	d_instantiate(dentry, inode);
 	unlock_new_inode(inode);
 	orangefs_set_timeout(dentry);
 	ORANGEFS_I(inode)->getattr_time = jiffies - 1;
 	ORANGEFS_I(inode)->getattr_mask = STATX_BASIC_STATS;

 	gossip_debug(GOSSIP_NAME_DEBUG,
 		     "Inode (Symlink) %pU -> %pd\n",
 		     get_khandle_from_ino(inode),
 		     dentry);

 	dir->i_mtime = dir->i_ctime = current_time(dir);
 	memset(&iattr, 0, sizeof iattr);
 	iattr.ia_valid |= ATTR_MTIME;
 	orangefs_inode_setattr(dir, &iattr);
 	mark_inode_dirty_sync(dir);
 	ret = 0;
 out:
 	return ret;
 }

 static int orangefs_mkdir(struct inode *dir, struct dentry *dentry, umode_t mode)
 {
 	struct orangefs_inode_s *parent = ORANGEFS_I(dir);
 	struct orangefs_kernel_op_s *new_op;
 	struct orangefs_object_kref ref;
 	struct inode *inode;
 	struct iattr iattr;
 	int ret;

 	new_op = op_alloc(ORANGEFS_VFS_OP_MKDIR);
 	if (!new_op)
 		return -ENOMEM;

 	new_op->upcall.req.mkdir.parent_refn = parent->refn;

 	fill_default_sys_attrs(new_op->upcall.req.mkdir.attributes,
 			      ORANGEFS_TYPE_DIRECTORY, mode);

 	strncpy(new_op->upcall.req.mkdir.d_name,
 		dentry->d_name.name, ORANGEFS_NAME_MAX);

 	ret = service_operation(new_op, __func__, get_interruptible_flag(dir));

 	gossip_debug(GOSSIP_NAME_DEBUG,
 		     "Mkdir Got ORANGEFS handle %pU on fsid %d\n",
 		     &new_op->downcall.resp.mkdir.refn.khandle,
 		     new_op->downcall.resp.mkdir.refn.fs_id);

 	if (ret < 0) {
 		gossip_debug(GOSSIP_NAME_DEBUG,
 			     "%s: failed with error code %d\n",
 			     __func__, ret);
 		goto out;
 	}

 	ref = new_op->downcall.resp.mkdir.refn;
 	op_release(new_op);

 	inode = orangefs_new_inode(dir->i_sb, dir, S_IFDIR | mode, 0, &ref);
 	if (IS_ERR(inode)) {
 		gossip_err("*** Failed to allocate orangefs dir inode\n");
 		ret = PTR_ERR(inode);
 		goto out;
 	}

 	gossip_debug(GOSSIP_NAME_DEBUG,
 		     "Assigned dir inode new number of %pU\n",
 		     get_khandle_from_ino(inode));

 	d_instantiate(dentry, inode);
 	unlock_new_inode(inode);
 	orangefs_set_timeout(dentry);
 	ORANGEFS_I(inode)->getattr_time = jiffies - 1;
 	ORANGEFS_I(inode)->getattr_mask = STATX_BASIC_STATS;

 	gossip_debug(GOSSIP_NAME_DEBUG,
 		     "Inode (Directory) %pU -> %pd\n",
 		     get_khandle_from_ino(inode),
 		     dentry);

 	/*
 	 * NOTE: we have no good way to keep nlink consistent for directories
 	 * across clients; keep constant at 1.
 	 */
 	dir->i_mtime = dir->i_ctime = current_time(dir);
 	memset(&iattr, 0, sizeof iattr);
 	iattr.ia_valid |= ATTR_MTIME;
 	orangefs_inode_setattr(dir, &iattr);
 	mark_inode_dirty_sync(dir);
 out:
 	return ret;
 }

 static int orangefs_rename(struct inode *old_dir,
 			struct dentry *old_dentry,
 			struct inode *new_dir,
 			struct dentry *new_dentry,
 			unsigned int flags)
 {
 	struct orangefs_kernel_op_s *new_op;
 	int ret;

 	if (flags)
 		return -EINVAL;

 	gossip_debug(GOSSIP_NAME_DEBUG,
 		     "orangefs_rename: called (%pd2 => %pd2) ct=%d\n",
 		     old_dentry, new_dentry, d_count(new_dentry));

 	ORANGEFS_I(new_dentry->d_parent->d_inode)->getattr_time = jiffies - 1;

 	new_op = op_alloc(ORANGEFS_VFS_OP_RENAME);
 	if (!new_op)
 		return -EINVAL;

 	new_op->upcall.req.rename.old_parent_refn = ORANGEFS_I(old_dir)->refn;
 	new_op->upcall.req.rename.new_parent_refn = ORANGEFS_I(new_dir)->refn;

 	strncpy(new_op->upcall.req.rename.d_old_name,
 		old_dentry->d_name.name,
 		ORANGEFS_NAME_MAX);
 	strncpy(new_op->upcall.req.rename.d_new_name,
 		new_dentry->d_name.name,
 		ORANGEFS_NAME_MAX);

 	ret = service_operation(new_op,
 				"orangefs_rename",
 				get_interruptible_flag(old_dentry->d_inode));

 	gossip_debug(GOSSIP_NAME_DEBUG,
 		     "orangefs_rename: got downcall status %d\n",
 		     ret);

 	if (new_dentry->d_inode)
 		new_dentry->d_inode->i_ctime = current_time(new_dentry->d_inode);

 	op_release(new_op);
 	return ret;
 }

 /* ORANGEFS implementation of VFS inode operations for directories */
 const struct inode_operations orangefs_dir_inode_operations = {
 	.lookup = orangefs_lookup,
 	.get_acl = orangefs_get_acl,
 	.set_acl = orangefs_set_acl,
 	.create = orangefs_create,
 	.unlink = orangefs_unlink,
 	.symlink = orangefs_symlink,
 	.mkdir = orangefs_mkdir,
 	.rmdir = orangefs_unlink,
 	.rename = orangefs_rename,
 	.setattr = orangefs_setattr,
 	.getattr = orangefs_getattr,
 	.listxattr = orangefs_listxattr,
 	.permission = orangefs_permission,
 	.update_time = orangefs_update_time,
 };
	// SPDX-License-Identifier: GPL-2.0
	/*
	* (C) 2001 Clemson University and The University of Chicago
	*
	* See COPYING in top-level directory.
	*/

	/*
	* Linux VFS namei operations.
	*/

	#include "protocol.h"
	#include "orangefs-kernel.h"

	/*
	* Get a newly allocated inode to go with a negative dentry.
	*/
	static int orangefs_create(struct inode *dir,
	struct dentry *dentry,
	umode_t mode,
	bool exclusive)
	{
	struct orangefs_inode_s *parent = ORANGEFS_I(dir);
	struct orangefs_kernel_op_s *new_op;
	struct orangefs_object_kref ref;
	struct inode *inode;
	struct iattr iattr;
	int ret;

	gossip_debug(GOSSIP_NAME_DEBUG, "%s: %pd\n",
	__func__,
	dentry);

	new_op = op_alloc(ORANGEFS_VFS_OP_CREATE);
	if (!new_op)
	return -ENOMEM;

	new_op->upcall.req.create.parent_refn = parent->refn;

	fill_default_sys_attrs(new_op->upcall.req.create.attributes,
	ORANGEFS_TYPE_METAFILE, mode);

	strncpy(new_op->upcall.req.create.d_name,
	dentry->d_name.name, ORANGEFS_NAME_MAX);

	ret = service_operation(new_op, __func__, get_interruptible_flag(dir));

	gossip_debug(GOSSIP_NAME_DEBUG,
	"%s: %pd: handle:%pU: fsid:%d: new_op:%p: ret:%d:\n",
	__func__,
	dentry,
	&new_op->downcall.resp.create.refn.khandle,
	new_op->downcall.resp.create.refn.fs_id,
	new_op,
	ret);

	if (ret < 0)
	goto out;

	ref = new_op->downcall.resp.create.refn;
	op_release(new_op);

	inode = orangefs_new_inode(dir->i_sb, dir, S_IFREG \| mode, 0, &ref);
	if (IS_ERR(inode)) {
	gossip_err("%s: Failed to allocate inode for file :%pd:\n",
	__func__,
	dentry);
	ret = PTR_ERR(inode);
	goto out;
	}

	gossip_debug(GOSSIP_NAME_DEBUG,
	"%s: Assigned inode :%pU: for file :%pd:\n",
	__func__,
	get_khandle_from_ino(inode),
	dentry);

	d_instantiate(dentry, inode);
	unlock_new_inode(inode);
	orangefs_set_timeout(dentry);
	ORANGEFS_I(inode)->getattr_time = jiffies - 1;
	ORANGEFS_I(inode)->getattr_mask = STATX_BASIC_STATS;

	gossip_debug(GOSSIP_NAME_DEBUG,
	"%s: dentry instantiated for %pd\n",
	__func__,
	dentry);

	dir->i_mtime = dir->i_ctime = current_time(dir);
	memset(&iattr, 0, sizeof iattr);
	iattr.ia_valid \|= ATTR_MTIME;
	orangefs_inode_setattr(dir, &iattr);
	mark_inode_dirty_sync(dir);
	ret = 0;
	out:
	gossip_debug(GOSSIP_NAME_DEBUG,
	"%s: %pd: returning %d\n",
	__func__,
	dentry,
	ret);
	return ret;
	}

	/*
	* Attempt to resolve an object name (dentry->d_name), parent handle, and
	* fsid into a handle for the object.
	*/
	static struct dentry orangefs_lookup(struct inode dir, struct dentry *dentry,
	unsigned int flags)
	{
	struct orangefs_inode_s *parent = ORANGEFS_I(dir);
	struct orangefs_kernel_op_s *new_op;
	struct inode *inode;
	struct dentry *res;
	int ret = -EINVAL;

	/*
	* in theory we could skip a lookup here (if the intent is to
	* create) in order to avoid a potentially failed lookup, but
	* leaving it in can skip a valid lookup and try to create a file
	* that already exists (e.g. the vfs already handles checking for
	* -EEXIST on O_EXCL opens, which is broken if we skip this lookup
	* in the create path)
	*/
	gossip_debug(GOSSIP_NAME_DEBUG, "%s called on %pd\n",
	__func__, dentry);

	if (dentry->d_name.len > (ORANGEFS_NAME_MAX - 1))
	return ERR_PTR(-ENAMETOOLONG);

	new_op = op_alloc(ORANGEFS_VFS_OP_LOOKUP);
	if (!new_op)
	return ERR_PTR(-ENOMEM);

	new_op->upcall.req.lookup.sym_follow = ORANGEFS_LOOKUP_LINK_NO_FOLLOW;

	gossip_debug(GOSSIP_NAME_DEBUG, "%s:%s:%d using parent %pU\n",
	__FILE__,
	__func__,
	__LINE__,
	&parent->refn.khandle);
	new_op->upcall.req.lookup.parent_refn = parent->refn;

	strncpy(new_op->upcall.req.lookup.d_name, dentry->d_name.name,
	ORANGEFS_NAME_MAX);

	gossip_debug(GOSSIP_NAME_DEBUG,
	"%s: doing lookup on %s under %pU,%d\n",
	__func__,
	new_op->upcall.req.lookup.d_name,
	&new_op->upcall.req.lookup.parent_refn.khandle,
	new_op->upcall.req.lookup.parent_refn.fs_id);

	ret = service_operation(new_op, __func__, get_interruptible_flag(dir));

	gossip_debug(GOSSIP_NAME_DEBUG,
	"Lookup Got %pU, fsid %d (ret=%d)\n",
	&new_op->downcall.resp.lookup.refn.khandle,
	new_op->downcall.resp.lookup.refn.fs_id,
	ret);

	if (ret < 0) {
	if (ret == -ENOENT) {
	/*
	* if no inode was found, add a negative dentry to
	* dcache anyway; if we don't, we don't hold expected
	* lookup semantics and we most noticeably break
	* during directory renames.
	*
	* however, if the operation failed or exited, do not
	* add the dentry (e.g. in the case that a touch is
	* issued on a file that already exists that was
	* interrupted during this lookup -- no need to add
	* another negative dentry for an existing file)
	*/

	gossip_debug(GOSSIP_NAME_DEBUG,
	"orangefs_lookup: Adding negative dentry "
	"%p for %pd\n",
	dentry,
	dentry);

	d_add(dentry, NULL);
	res = NULL;
	goto out;
	}

	/* must be a non-recoverable error */
	res = ERR_PTR(ret);
	goto out;
	}

	orangefs_set_timeout(dentry);

	inode = orangefs_iget(dir->i_sb, &new_op->downcall.resp.lookup.refn);
	if (IS_ERR(inode)) {
	gossip_debug(GOSSIP_NAME_DEBUG,
	"error %ld from iget\n", PTR_ERR(inode));
	res = ERR_CAST(inode);
	goto out;
	}

	gossip_debug(GOSSIP_NAME_DEBUG,
	"%s:%s:%d "
	"Found good inode [%lu] with count [%d]\n",
	__FILE__,
	__func__,
	__LINE__,
	inode->i_ino,
	(int)atomic_read(&inode->i_count));

	/* update dentry/inode pair into dcache */
	res = d_splice_alias(inode, dentry);

	gossip_debug(GOSSIP_NAME_DEBUG,
	"Lookup success (inode ct = %d)\n",
	(int)atomic_read(&inode->i_count));
	out:
	op_release(new_op);
	return res;
	}

	/* return 0 on success; non-zero otherwise */
	static int orangefs_unlink(struct inode dir, struct dentry dentry)
	{
	struct inode *inode = dentry->d_inode;
	struct orangefs_inode_s *parent = ORANGEFS_I(dir);
	struct orangefs_kernel_op_s *new_op;
	struct iattr iattr;
	int ret;

	gossip_debug(GOSSIP_NAME_DEBUG,
	"%s: called on %pd\n"
	" (inode %pU): Parent is %pU \| fs_id %d\n",
	__func__,
	dentry,
	get_khandle_from_ino(inode),
	&parent->refn.khandle,
	parent->refn.fs_id);

	new_op = op_alloc(ORANGEFS_VFS_OP_REMOVE);
	if (!new_op)
	return -ENOMEM;

	new_op->upcall.req.remove.parent_refn = parent->refn;
	strncpy(new_op->upcall.req.remove.d_name, dentry->d_name.name,
	ORANGEFS_NAME_MAX);

	ret = service_operation(new_op, "orangefs_unlink",
	get_interruptible_flag(inode));

	gossip_debug(GOSSIP_NAME_DEBUG,
	"%s: service_operation returned:%d:\n",
	__func__,
	ret);

	op_release(new_op);

	if (!ret) {
	drop_nlink(inode);

	dir->i_mtime = dir->i_ctime = current_time(dir);
	memset(&iattr, 0, sizeof iattr);
	iattr.ia_valid \|= ATTR_MTIME;
	orangefs_inode_setattr(dir, &iattr);
	mark_inode_dirty_sync(dir);
	}
	return ret;
	}

	static int orangefs_symlink(struct inode *dir,
	struct dentry *dentry,
	const char *symname)
	{
	struct orangefs_inode_s *parent = ORANGEFS_I(dir);
	struct orangefs_kernel_op_s *new_op;
	struct orangefs_object_kref ref;
	struct inode *inode;
	struct iattr iattr;
	int mode = 755;
	int ret;

	gossip_debug(GOSSIP_NAME_DEBUG, "%s: called\n", __func__);

	if (!symname)
	return -EINVAL;

	if (strlen(symname)+1 > ORANGEFS_NAME_MAX)
	return -ENAMETOOLONG;

	new_op = op_alloc(ORANGEFS_VFS_OP_SYMLINK);
	if (!new_op)
	return -ENOMEM;

	new_op->upcall.req.sym.parent_refn = parent->refn;

	fill_default_sys_attrs(new_op->upcall.req.sym.attributes,
	ORANGEFS_TYPE_SYMLINK,
	mode);

	strncpy(new_op->upcall.req.sym.entry_name,
	dentry->d_name.name,
	ORANGEFS_NAME_MAX);
	strncpy(new_op->upcall.req.sym.target, symname, ORANGEFS_NAME_MAX);

	ret = service_operation(new_op, __func__, get_interruptible_flag(dir));

	gossip_debug(GOSSIP_NAME_DEBUG,
	"Symlink Got ORANGEFS handle %pU on fsid %d (ret=%d)\n",
	&new_op->downcall.resp.sym.refn.khandle,
	new_op->downcall.resp.sym.refn.fs_id, ret);

	if (ret < 0) {
	gossip_debug(GOSSIP_NAME_DEBUG,
	"%s: failed with error code %d\n",
	__func__, ret);
	goto out;
	}

	ref = new_op->downcall.resp.sym.refn;
	op_release(new_op);

	inode = orangefs_new_inode(dir->i_sb, dir, S_IFLNK \| mode, 0, &ref);
	if (IS_ERR(inode)) {
	gossip_err
	("*** Failed to allocate orangefs symlink inode\n");
	ret = PTR_ERR(inode);
	goto out;
	}

	gossip_debug(GOSSIP_NAME_DEBUG,
	"Assigned symlink inode new number of %pU\n",
	get_khandle_from_ino(inode));

	d_instantiate(dentry, inode);
	unlock_new_inode(inode);
	orangefs_set_timeout(dentry);
	ORANGEFS_I(inode)->getattr_time = jiffies - 1;
	ORANGEFS_I(inode)->getattr_mask = STATX_BASIC_STATS;

	gossip_debug(GOSSIP_NAME_DEBUG,
	"Inode (Symlink) %pU -> %pd\n",
	get_khandle_from_ino(inode),
	dentry);

	dir->i_mtime = dir->i_ctime = current_time(dir);
	memset(&iattr, 0, sizeof iattr);
	iattr.ia_valid \|= ATTR_MTIME;
	orangefs_inode_setattr(dir, &iattr);
	mark_inode_dirty_sync(dir);
	ret = 0;
	out:
	return ret;
	}

	static int orangefs_mkdir(struct inode dir, struct dentry dentry, umode_t mode)
	{
	struct orangefs_inode_s *parent = ORANGEFS_I(dir);
	struct orangefs_kernel_op_s *new_op;
	struct orangefs_object_kref ref;
	struct inode *inode;
	struct iattr iattr;
	int ret;

	new_op = op_alloc(ORANGEFS_VFS_OP_MKDIR);
	if (!new_op)
	return -ENOMEM;

	new_op->upcall.req.mkdir.parent_refn = parent->refn;

	fill_default_sys_attrs(new_op->upcall.req.mkdir.attributes,
	ORANGEFS_TYPE_DIRECTORY, mode);

	strncpy(new_op->upcall.req.mkdir.d_name,
	dentry->d_name.name, ORANGEFS_NAME_MAX);

	ret = service_operation(new_op, __func__, get_interruptible_flag(dir));

	gossip_debug(GOSSIP_NAME_DEBUG,
	"Mkdir Got ORANGEFS handle %pU on fsid %d\n",
	&new_op->downcall.resp.mkdir.refn.khandle,
	new_op->downcall.resp.mkdir.refn.fs_id);

	if (ret < 0) {
	gossip_debug(GOSSIP_NAME_DEBUG,
	"%s: failed with error code %d\n",
	__func__, ret);
	goto out;
	}

	ref = new_op->downcall.resp.mkdir.refn;
	op_release(new_op);

	inode = orangefs_new_inode(dir->i_sb, dir, S_IFDIR \| mode, 0, &ref);
	if (IS_ERR(inode)) {
	gossip_err("*** Failed to allocate orangefs dir inode\n");
	ret = PTR_ERR(inode);
	goto out;
	}

	gossip_debug(GOSSIP_NAME_DEBUG,
	"Assigned dir inode new number of %pU\n",
	get_khandle_from_ino(inode));

	d_instantiate(dentry, inode);
	unlock_new_inode(inode);
	orangefs_set_timeout(dentry);
	ORANGEFS_I(inode)->getattr_time = jiffies - 1;
	ORANGEFS_I(inode)->getattr_mask = STATX_BASIC_STATS;

	gossip_debug(GOSSIP_NAME_DEBUG,
	"Inode (Directory) %pU -> %pd\n",
	get_khandle_from_ino(inode),
	dentry);

	/*
	* NOTE: we have no good way to keep nlink consistent for directories
	* across clients; keep constant at 1.
	*/
	dir->i_mtime = dir->i_ctime = current_time(dir);
	memset(&iattr, 0, sizeof iattr);
	iattr.ia_valid \|= ATTR_MTIME;
	orangefs_inode_setattr(dir, &iattr);
	mark_inode_dirty_sync(dir);
	out:
	return ret;
	}

	static int orangefs_rename(struct inode *old_dir,
	struct dentry *old_dentry,
	struct inode *new_dir,
	struct dentry *new_dentry,
	unsigned int flags)
	{
	struct orangefs_kernel_op_s *new_op;
	int ret;

	if (flags)
	return -EINVAL;

	gossip_debug(GOSSIP_NAME_DEBUG,
	"orangefs_rename: called (%pd2 => %pd2) ct=%d\n",
	old_dentry, new_dentry, d_count(new_dentry));

	ORANGEFS_I(new_dentry->d_parent->d_inode)->getattr_time = jiffies - 1;

	new_op = op_alloc(ORANGEFS_VFS_OP_RENAME);
	if (!new_op)
	return -EINVAL;

	new_op->upcall.req.rename.old_parent_refn = ORANGEFS_I(old_dir)->refn;
	new_op->upcall.req.rename.new_parent_refn = ORANGEFS_I(new_dir)->refn;

	strncpy(new_op->upcall.req.rename.d_old_name,
	old_dentry->d_name.name,
	ORANGEFS_NAME_MAX);
	strncpy(new_op->upcall.req.rename.d_new_name,
	new_dentry->d_name.name,
	ORANGEFS_NAME_MAX);

	ret = service_operation(new_op,
	"orangefs_rename",
	get_interruptible_flag(old_dentry->d_inode));

	gossip_debug(GOSSIP_NAME_DEBUG,
	"orangefs_rename: got downcall status %d\n",
	ret);

	if (new_dentry->d_inode)
	new_dentry->d_inode->i_ctime = current_time(new_dentry->d_inode);

	op_release(new_op);
	return ret;
	}

	/* ORANGEFS implementation of VFS inode operations for directories */
	const struct inode_operations orangefs_dir_inode_operations = {
	.lookup = orangefs_lookup,
	.get_acl = orangefs_get_acl,
	.set_acl = orangefs_set_acl,
	.create = orangefs_create,
	.unlink = orangefs_unlink,
	.symlink = orangefs_symlink,
	.mkdir = orangefs_mkdir,
	.rmdir = orangefs_unlink,
	.rename = orangefs_rename,
	.setattr = orangefs_setattr,
	.getattr = orangefs_getattr,
	.listxattr = orangefs_listxattr,
	.permission = orangefs_permission,
	.update_time = orangefs_update_time,
	};