[mirror_ubuntu-bionic-kernel.git] / fs / orangefs / namei.c

// 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_new(dentry, 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_new(dentry, 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_new(dentry, 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,
};
Commit	Line	Data
b2441318	1	// SPDX-License-Identifier: GPL-2.0
274dcf55 MM	2	/*
	3	* (C) 2001 Clemson University and The University of Chicago
	4	*
	5	* See COPYING in top-level directory.
	6	*/
	7
	8	/*
	9	* Linux VFS namei operations.
	10	*/
	11
	12	#include "protocol.h"
575e9461	13	#include "orangefs-kernel.h"
274dcf55 MM	14
	15	/*
	16	* Get a newly allocated inode to go with a negative dentry.
	17	*/
8bb8aefd	18	static int orangefs_create(struct inode *dir,
274dcf55 MM	19	struct dentry *dentry,
	20	umode_t mode,
	21	bool exclusive)
	22	{
8bb8aefd YL	23	struct orangefs_inode_s *parent = ORANGEFS_I(dir);
8bb8aefd YL	24	struct orangefs_kernel_op_s *new_op;
db0267e7	25	struct orangefs_object_kref ref;
274dcf55	26	struct inode *inode;
a55f2d86	27	struct iattr iattr;
274dcf55 MM	28	int ret;
274dcf55 MM	29
f66debf1	30	gossip_debug(GOSSIP_NAME_DEBUG, "%s: %pd\n",
5253487e	31	__func__,
f66debf1	32	dentry);
274dcf55	33
8bb8aefd	34	new_op = op_alloc(ORANGEFS_VFS_OP_CREATE);
274dcf55 MM	35	if (!new_op)
	36	return -ENOMEM;
	37
	38	new_op->upcall.req.create.parent_refn = parent->refn;
	39
	40	fill_default_sys_attrs(new_op->upcall.req.create.attributes,
8bb8aefd	41	ORANGEFS_TYPE_METAFILE, mode);
274dcf55 MM	42
274dcf55 MM	43	strncpy(new_op->upcall.req.create.d_name,
47b4948f	44	dentry->d_name.name, ORANGEFS_NAME_MAX);
274dcf55 MM	45
	46	ret = service_operation(new_op, __func__, get_interruptible_flag(dir));
	47
	48	gossip_debug(GOSSIP_NAME_DEBUG,
f66debf1	49	"%s: %pd: handle:%pU: fsid:%d: new_op:%p: ret:%d:\n",
5253487e	50	__func__,
f66debf1	51	dentry,
274dcf55	52	&new_op->downcall.resp.create.refn.khandle,
5253487e MM	53	new_op->downcall.resp.create.refn.fs_id,
	54	new_op,
	55	ret);
274dcf55	56
5253487e	57	if (ret < 0)
274dcf55	58	goto out;
274dcf55	59
db0267e7 MB	60	ref = new_op->downcall.resp.create.refn;
	61	op_release(new_op);
	62
	63	inode = orangefs_new_inode(dir->i_sb, dir, S_IFREG \| mode, 0, &ref);
274dcf55	64	if (IS_ERR(inode)) {
f66debf1	65	gossip_err("%s: Failed to allocate inode for file :%pd:\n",
5253487e	66	__func__,
f66debf1	67	dentry);
274dcf55 MM	68	ret = PTR_ERR(inode);
	69	goto out;
	70	}
	71
	72	gossip_debug(GOSSIP_NAME_DEBUG,
f66debf1	73	"%s: Assigned inode :%pU: for file :%pd:\n",
5253487e MM	74	__func__,
5253487e MM	75	get_khandle_from_ino(inode),
f66debf1	76	dentry);
274dcf55	77
00d2f2d5	78	d_instantiate_new(dentry, inode);
804b1737	79	orangefs_set_timeout(dentry);
8bbb20a8	80	ORANGEFS_I(inode)->getattr_time = jiffies - 1;
68a24a6c	81	ORANGEFS_I(inode)->getattr_mask = STATX_BASIC_STATS;
274dcf55 MM	82
274dcf55 MM	83	gossip_debug(GOSSIP_NAME_DEBUG,
f66debf1	84	"%s: dentry instantiated for %pd\n",
5253487e	85	__func__,
f66debf1	86	dentry);
274dcf55	87
c2050a45	88	dir->i_mtime = dir->i_ctime = current_time(dir);
a55f2d86 MB	89	memset(&iattr, 0, sizeof iattr);
	90	iattr.ia_valid \|= ATTR_MTIME;
	91	orangefs_inode_setattr(dir, &iattr);
274dcf55 MM	92	mark_inode_dirty_sync(dir);
	93	ret = 0;
	94	out:
5253487e	95	gossip_debug(GOSSIP_NAME_DEBUG,
f66debf1	96	"%s: %pd: returning %d\n",
5253487e	97	__func__,
f66debf1	98	dentry,
5253487e	99	ret);
274dcf55 MM	100	return ret;
	101	}
	102
	103	/*
	104	* Attempt to resolve an object name (dentry->d_name), parent handle, and
	105	* fsid into a handle for the object.
	106	*/
8bb8aefd	107	static struct dentry orangefs_lookup(struct inode dir, struct dentry *dentry,
274dcf55 MM	108	unsigned int flags)
274dcf55 MM	109	{
8bb8aefd YL	110	struct orangefs_inode_s *parent = ORANGEFS_I(dir);
8bb8aefd YL	111	struct orangefs_kernel_op_s *new_op;
274dcf55 MM	112	struct inode *inode;
	113	struct dentry *res;
	114	int ret = -EINVAL;
	115
	116	/*
	117	* in theory we could skip a lookup here (if the intent is to
	118	* create) in order to avoid a potentially failed lookup, but
	119	* leaving it in can skip a valid lookup and try to create a file
	120	* that already exists (e.g. the vfs already handles checking for
	121	* -EEXIST on O_EXCL opens, which is broken if we skip this lookup
	122	* in the create path)
	123	*/
f66debf1 AV	124	gossip_debug(GOSSIP_NAME_DEBUG, "%s called on %pd\n",
f66debf1 AV	125	__func__, dentry);
274dcf55	126
47b4948f	127	if (dentry->d_name.len > (ORANGEFS_NAME_MAX - 1))
274dcf55 MM	128	return ERR_PTR(-ENAMETOOLONG);
274dcf55 MM	129
8bb8aefd	130	new_op = op_alloc(ORANGEFS_VFS_OP_LOOKUP);
274dcf55 MM	131	if (!new_op)
	132	return ERR_PTR(-ENOMEM);
	133
7cec28e9	134	new_op->upcall.req.lookup.sym_follow = ORANGEFS_LOOKUP_LINK_NO_FOLLOW;
274dcf55 MM	135
	136	gossip_debug(GOSSIP_NAME_DEBUG, "%s:%s:%d using parent %pU\n",
	137	__FILE__,
	138	__func__,
	139	__LINE__,
	140	&parent->refn.khandle);
	141	new_op->upcall.req.lookup.parent_refn = parent->refn;
	142
	143	strncpy(new_op->upcall.req.lookup.d_name, dentry->d_name.name,
47b4948f	144	ORANGEFS_NAME_MAX);
274dcf55 MM	145
274dcf55 MM	146	gossip_debug(GOSSIP_NAME_DEBUG,
6ceaf781	147	"%s: doing lookup on %s under %pU,%d\n",
274dcf55 MM	148	__func__,
	149	new_op->upcall.req.lookup.d_name,
	150	&new_op->upcall.req.lookup.parent_refn.khandle,
6ceaf781	151	new_op->upcall.req.lookup.parent_refn.fs_id);
274dcf55 MM	152
	153	ret = service_operation(new_op, __func__, get_interruptible_flag(dir));
	154
	155	gossip_debug(GOSSIP_NAME_DEBUG,
	156	"Lookup Got %pU, fsid %d (ret=%d)\n",
	157	&new_op->downcall.resp.lookup.refn.khandle,
	158	new_op->downcall.resp.lookup.refn.fs_id,
	159	ret);
	160
	161	if (ret < 0) {
	162	if (ret == -ENOENT) {
	163	/*
	164	* if no inode was found, add a negative dentry to
	165	* dcache anyway; if we don't, we don't hold expected
	166	* lookup semantics and we most noticeably break
	167	* during directory renames.
	168	*
	169	* however, if the operation failed or exited, do not
	170	* add the dentry (e.g. in the case that a touch is
	171	* issued on a file that already exists that was
	172	* interrupted during this lookup -- no need to add
	173	* another negative dentry for an existing file)
	174	*/
	175
	176	gossip_debug(GOSSIP_NAME_DEBUG,
8bb8aefd	177	"orangefs_lookup: Adding negative dentry "
f66debf1	178	"%p for %pd\n",
274dcf55	179	dentry,
f66debf1	180	dentry);
274dcf55 MM	181
	182	d_add(dentry, NULL);
	183	res = NULL;
	184	goto out;
	185	}
	186
	187	/* must be a non-recoverable error */
	188	res = ERR_PTR(ret);
	189	goto out;
	190	}
	191
804b1737	192	orangefs_set_timeout(dentry);
31b7c1ab	193
8bb8aefd	194	inode = orangefs_iget(dir->i_sb, &new_op->downcall.resp.lookup.refn);
274dcf55 MM	195	if (IS_ERR(inode)) {
	196	gossip_debug(GOSSIP_NAME_DEBUG,
	197	"error %ld from iget\n", PTR_ERR(inode));
	198	res = ERR_CAST(inode);
	199	goto out;
	200	}
	201
	202	gossip_debug(GOSSIP_NAME_DEBUG,
	203	"%s:%s:%d "
	204	"Found good inode [%lu] with count [%d]\n",
	205	__FILE__,
	206	__func__,
	207	__LINE__,
	208	inode->i_ino,
	209	(int)atomic_read(&inode->i_count));
	210
	211	/* update dentry/inode pair into dcache */
	212	res = d_splice_alias(inode, dentry);
	213
	214	gossip_debug(GOSSIP_NAME_DEBUG,
	215	"Lookup success (inode ct = %d)\n",
	216	(int)atomic_read(&inode->i_count));
	217	out:
	218	op_release(new_op);
	219	return res;
	220	}
	221
	222	/* return 0 on success; non-zero otherwise */
8bb8aefd	223	static int orangefs_unlink(struct inode dir, struct dentry dentry)
274dcf55 MM	224	{
274dcf55 MM	225	struct inode *inode = dentry->d_inode;
8bb8aefd YL	226	struct orangefs_inode_s *parent = ORANGEFS_I(dir);
8bb8aefd YL	227	struct orangefs_kernel_op_s *new_op;
a55f2d86	228	struct iattr iattr;
274dcf55 MM	229	int ret;
	230
	231	gossip_debug(GOSSIP_NAME_DEBUG,
f66debf1	232	"%s: called on %pd\n"
274dcf55 MM	233	" (inode %pU): Parent is %pU \| fs_id %d\n",
274dcf55 MM	234	__func__,
f66debf1	235	dentry,
274dcf55 MM	236	get_khandle_from_ino(inode),
	237	&parent->refn.khandle,
	238	parent->refn.fs_id);
	239
8bb8aefd	240	new_op = op_alloc(ORANGEFS_VFS_OP_REMOVE);
274dcf55 MM	241	if (!new_op)
	242	return -ENOMEM;
	243
	244	new_op->upcall.req.remove.parent_refn = parent->refn;
	245	strncpy(new_op->upcall.req.remove.d_name, dentry->d_name.name,
47b4948f	246	ORANGEFS_NAME_MAX);
274dcf55	247
8bb8aefd	248	ret = service_operation(new_op, "orangefs_unlink",
274dcf55 MM	249	get_interruptible_flag(inode));
274dcf55 MM	250
5253487e MM	251	gossip_debug(GOSSIP_NAME_DEBUG,
	252	"%s: service_operation returned:%d:\n",
	253	__func__,
	254	ret);
	255
274dcf55 MM	256	op_release(new_op);
	257
	258	if (!ret) {
	259	drop_nlink(inode);
	260
c2050a45	261	dir->i_mtime = dir->i_ctime = current_time(dir);
a55f2d86 MB	262	memset(&iattr, 0, sizeof iattr);
	263	iattr.ia_valid \|= ATTR_MTIME;
	264	orangefs_inode_setattr(dir, &iattr);
274dcf55 MM	265	mark_inode_dirty_sync(dir);
	266	}
	267	return ret;
	268	}
	269
8bb8aefd	270	static int orangefs_symlink(struct inode *dir,
274dcf55 MM	271	struct dentry *dentry,
	272	const char *symname)
	273	{
8bb8aefd YL	274	struct orangefs_inode_s *parent = ORANGEFS_I(dir);
8bb8aefd YL	275	struct orangefs_kernel_op_s *new_op;
db0267e7	276	struct orangefs_object_kref ref;
274dcf55	277	struct inode *inode;
a55f2d86	278	struct iattr iattr;
274dcf55 MM	279	int mode = 755;
	280	int ret;
	281
	282	gossip_debug(GOSSIP_NAME_DEBUG, "%s: called\n", __func__);
	283
	284	if (!symname)
	285	return -EINVAL;
	286
c62da585 MB	287	if (strlen(symname)+1 > ORANGEFS_NAME_MAX)
	288	return -ENAMETOOLONG;
	289
8bb8aefd	290	new_op = op_alloc(ORANGEFS_VFS_OP_SYMLINK);
274dcf55 MM	291	if (!new_op)
	292	return -ENOMEM;
	293
	294	new_op->upcall.req.sym.parent_refn = parent->refn;
	295
	296	fill_default_sys_attrs(new_op->upcall.req.sym.attributes,
8bb8aefd	297	ORANGEFS_TYPE_SYMLINK,
274dcf55 MM	298	mode);
	299
	300	strncpy(new_op->upcall.req.sym.entry_name,
	301	dentry->d_name.name,
47b4948f MB	302	ORANGEFS_NAME_MAX);
47b4948f MB	303	strncpy(new_op->upcall.req.sym.target, symname, ORANGEFS_NAME_MAX);
274dcf55 MM	304
	305	ret = service_operation(new_op, __func__, get_interruptible_flag(dir));
	306
	307	gossip_debug(GOSSIP_NAME_DEBUG,
8bb8aefd	308	"Symlink Got ORANGEFS handle %pU on fsid %d (ret=%d)\n",
274dcf55 MM	309	&new_op->downcall.resp.sym.refn.khandle,
	310	new_op->downcall.resp.sym.refn.fs_id, ret);
	311
	312	if (ret < 0) {
	313	gossip_debug(GOSSIP_NAME_DEBUG,
	314	"%s: failed with error code %d\n",
	315	__func__, ret);
	316	goto out;
	317	}
	318
db0267e7 MB	319	ref = new_op->downcall.resp.sym.refn;
	320	op_release(new_op);
	321
	322	inode = orangefs_new_inode(dir->i_sb, dir, S_IFLNK \| mode, 0, &ref);
274dcf55 MM	323	if (IS_ERR(inode)) {
274dcf55 MM	324	gossip_err
8bb8aefd	325	("*** Failed to allocate orangefs symlink inode\n");
274dcf55 MM	326	ret = PTR_ERR(inode);
	327	goto out;
	328	}
	329
	330	gossip_debug(GOSSIP_NAME_DEBUG,
	331	"Assigned symlink inode new number of %pU\n",
	332	get_khandle_from_ino(inode));
	333
00d2f2d5	334	d_instantiate_new(dentry, inode);
804b1737	335	orangefs_set_timeout(dentry);
8bbb20a8	336	ORANGEFS_I(inode)->getattr_time = jiffies - 1;
68a24a6c	337	ORANGEFS_I(inode)->getattr_mask = STATX_BASIC_STATS;
274dcf55 MM	338
274dcf55 MM	339	gossip_debug(GOSSIP_NAME_DEBUG,
f66debf1	340	"Inode (Symlink) %pU -> %pd\n",
274dcf55	341	get_khandle_from_ino(inode),
f66debf1	342	dentry);
274dcf55	343
c2050a45	344	dir->i_mtime = dir->i_ctime = current_time(dir);
a55f2d86 MB	345	memset(&iattr, 0, sizeof iattr);
	346	iattr.ia_valid \|= ATTR_MTIME;
	347	orangefs_inode_setattr(dir, &iattr);
274dcf55 MM	348	mark_inode_dirty_sync(dir);
	349	ret = 0;
	350	out:
274dcf55 MM	351	return ret;
	352	}
	353
8bb8aefd	354	static int orangefs_mkdir(struct inode dir, struct dentry dentry, umode_t mode)
274dcf55	355	{
8bb8aefd YL	356	struct orangefs_inode_s *parent = ORANGEFS_I(dir);
8bb8aefd YL	357	struct orangefs_kernel_op_s *new_op;
db0267e7	358	struct orangefs_object_kref ref;
274dcf55	359	struct inode *inode;
a55f2d86	360	struct iattr iattr;
274dcf55 MM	361	int ret;
274dcf55 MM	362
8bb8aefd	363	new_op = op_alloc(ORANGEFS_VFS_OP_MKDIR);
274dcf55 MM	364	if (!new_op)
	365	return -ENOMEM;
	366
	367	new_op->upcall.req.mkdir.parent_refn = parent->refn;
	368
	369	fill_default_sys_attrs(new_op->upcall.req.mkdir.attributes,
8bb8aefd	370	ORANGEFS_TYPE_DIRECTORY, mode);
274dcf55 MM	371
274dcf55 MM	372	strncpy(new_op->upcall.req.mkdir.d_name,
47b4948f	373	dentry->d_name.name, ORANGEFS_NAME_MAX);
274dcf55 MM	374
	375	ret = service_operation(new_op, __func__, get_interruptible_flag(dir));
	376
	377	gossip_debug(GOSSIP_NAME_DEBUG,
8bb8aefd	378	"Mkdir Got ORANGEFS handle %pU on fsid %d\n",
274dcf55 MM	379	&new_op->downcall.resp.mkdir.refn.khandle,
	380	new_op->downcall.resp.mkdir.refn.fs_id);
	381
	382	if (ret < 0) {
	383	gossip_debug(GOSSIP_NAME_DEBUG,
	384	"%s: failed with error code %d\n",
	385	__func__, ret);
	386	goto out;
	387	}
	388
db0267e7 MB	389	ref = new_op->downcall.resp.mkdir.refn;
	390	op_release(new_op);
	391
	392	inode = orangefs_new_inode(dir->i_sb, dir, S_IFDIR \| mode, 0, &ref);
274dcf55	393	if (IS_ERR(inode)) {
8bb8aefd	394	gossip_err("*** Failed to allocate orangefs dir inode\n");
274dcf55 MM	395	ret = PTR_ERR(inode);
	396	goto out;
	397	}
	398
	399	gossip_debug(GOSSIP_NAME_DEBUG,
	400	"Assigned dir inode new number of %pU\n",
	401	get_khandle_from_ino(inode));
	402
00d2f2d5	403	d_instantiate_new(dentry, inode);
804b1737	404	orangefs_set_timeout(dentry);
8bbb20a8	405	ORANGEFS_I(inode)->getattr_time = jiffies - 1;
68a24a6c	406	ORANGEFS_I(inode)->getattr_mask = STATX_BASIC_STATS;
274dcf55 MM	407
274dcf55 MM	408	gossip_debug(GOSSIP_NAME_DEBUG,
f66debf1	409	"Inode (Directory) %pU -> %pd\n",
274dcf55	410	get_khandle_from_ino(inode),
f66debf1	411	dentry);
274dcf55 MM	412
	413	/*
	414	* NOTE: we have no good way to keep nlink consistent for directories
	415	* across clients; keep constant at 1.
	416	*/
c2050a45	417	dir->i_mtime = dir->i_ctime = current_time(dir);
a55f2d86 MB	418	memset(&iattr, 0, sizeof iattr);
	419	iattr.ia_valid \|= ATTR_MTIME;
	420	orangefs_inode_setattr(dir, &iattr);
274dcf55 MM	421	mark_inode_dirty_sync(dir);
274dcf55 MM	422	out:
274dcf55 MM	423	return ret;
	424	}
	425
8bb8aefd	426	static int orangefs_rename(struct inode *old_dir,
274dcf55 MM	427	struct dentry *old_dentry,
274dcf55 MM	428	struct inode *new_dir,
1cd66c93 MS	429	struct dentry *new_dentry,
1cd66c93 MS	430	unsigned int flags)
274dcf55	431	{
8bb8aefd	432	struct orangefs_kernel_op_s *new_op;
274dcf55 MM	433	int ret;
274dcf55 MM	434
1cd66c93 MS	435	if (flags)
	436	return -EINVAL;
	437
274dcf55	438	gossip_debug(GOSSIP_NAME_DEBUG,
96b0cffb AV	439	"orangefs_rename: called (%pd2 => %pd2) ct=%d\n",
96b0cffb AV	440	old_dentry, new_dentry, d_count(new_dentry));
274dcf55	441
8bbb20a8	442	ORANGEFS_I(new_dentry->d_parent->d_inode)->getattr_time = jiffies - 1;
71680c18	443
8bb8aefd	444	new_op = op_alloc(ORANGEFS_VFS_OP_RENAME);
274dcf55 MM	445	if (!new_op)
	446	return -EINVAL;
	447
8bb8aefd YL	448	new_op->upcall.req.rename.old_parent_refn = ORANGEFS_I(old_dir)->refn;
8bb8aefd YL	449	new_op->upcall.req.rename.new_parent_refn = ORANGEFS_I(new_dir)->refn;
274dcf55 MM	450
	451	strncpy(new_op->upcall.req.rename.d_old_name,
	452	old_dentry->d_name.name,
47b4948f	453	ORANGEFS_NAME_MAX);
274dcf55 MM	454	strncpy(new_op->upcall.req.rename.d_new_name,
274dcf55 MM	455	new_dentry->d_name.name,
47b4948f	456	ORANGEFS_NAME_MAX);
274dcf55 MM	457
274dcf55 MM	458	ret = service_operation(new_op,
8bb8aefd	459	"orangefs_rename",
274dcf55 MM	460	get_interruptible_flag(old_dentry->d_inode));
	461
	462	gossip_debug(GOSSIP_NAME_DEBUG,
8bb8aefd	463	"orangefs_rename: got downcall status %d\n",
274dcf55 MM	464	ret);
	465
	466	if (new_dentry->d_inode)
c2050a45	467	new_dentry->d_inode->i_ctime = current_time(new_dentry->d_inode);
274dcf55 MM	468
	469	op_release(new_op);
	470	return ret;
	471	}
	472
8bb8aefd	473	/* ORANGEFS implementation of VFS inode operations for directories */
6f3fc107	474	const struct inode_operations orangefs_dir_inode_operations = {
8bb8aefd YL	475	.lookup = orangefs_lookup,
	476	.get_acl = orangefs_get_acl,
	477	.set_acl = orangefs_set_acl,
	478	.create = orangefs_create,
	479	.unlink = orangefs_unlink,
	480	.symlink = orangefs_symlink,
	481	.mkdir = orangefs_mkdir,
	482	.rmdir = orangefs_unlink,
	483	.rename = orangefs_rename,
	484	.setattr = orangefs_setattr,
	485	.getattr = orangefs_getattr,
8bb8aefd	486	.listxattr = orangefs_listxattr,
933287da	487	.permission = orangefs_permission,
a55f2d86	488	.update_time = orangefs_update_time,
274dcf55	489	};